diff --git a/build/ckeditor.js b/build/ckeditor.js index f01000deda..2f4156c889 100644 --- a/build/ckeditor.js +++ b/build/ckeditor.js @@ -2,5 +2,5 @@ * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved. * For licensing, see LICENSE.md. */ -!function(t){t.en=Object.assign(t.en||{},{a:"Cannot upload file:",b:"Image toolbar",c:"Table toolbar",d:"Bold",e:"Block quote",f:"image widget",g:"Insert image or file",h:"Full size image",i:"Side image",j:"Left aligned image",k:"Centered image",l:"Right aligned image",m:"Choose heading",n:"Heading",o:"Italic",p:"Increase indent",q:"Decrease indent",r:"Numbered List",s:"Bulleted List",t:"Insert table",u:"Header column",v:"Insert column left",w:"Insert column right",x:"Delete column",y:"Column",z:"Header row",aa:"Insert row below",ab:"Insert row above",ac:"Delete row",ad:"Row",ae:"Merge cell up",af:"Merge cell right",ag:"Merge cell down",ah:"Merge cell left",ai:"Split cell vertically",aj:"Split cell horizontally",ak:"Merge cells",al:"Insert image",am:"Enter image caption",an:"Upload failed",ao:"media widget",ap:"Insert media",aq:"The URL must not be empty.",ar:"This media URL is not supported.",as:"Link",at:"Change image text 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a.ck.ck-button.ck-button_with-text .ck-button__icon{margin-right:calc(-1*var(--ck-spacing-small));margin-left:var(--ck-spacing-small)}.ck.ck-button.ck-button_with-keystroke .ck-button__label,a.ck.ck-button.ck-button_with-keystroke .ck-button__label{flex-grow:1}.ck.ck-button.ck-on,a.ck.ck-button.ck-on{background:var(--ck-color-button-on-background)}.ck.ck-button.ck-on:not(.ck-disabled):hover,a.ck.ck-button.ck-on:not(.ck-disabled):hover{background:var(--ck-color-button-on-hover-background)}.ck.ck-button.ck-on:not(.ck-disabled):active,a.ck.ck-button.ck-on:not(.ck-disabled):active{background:var(--ck-color-button-on-active-background);box-shadow:inset 0 2px 2px var(--ck-color-button-on-active-shadow)}.ck.ck-button.ck-on.ck-disabled,a.ck.ck-button.ck-on.ck-disabled{background:var(--ck-color-button-on-disabled-background)}.ck.ck-button.ck-button-save,a.ck.ck-button.ck-button-save{color:var(--ck-color-button-save)}.ck.ck-button.ck-button-cancel,a.ck.ck-button.ck-button-cancel{color:var(--ck-color-button-cancel)}.ck.ck-button-action,a.ck.ck-button-action{background:var(--ck-color-button-action-background)}.ck.ck-button-action:not(.ck-disabled):hover,a.ck.ck-button-action:not(.ck-disabled):hover{background:var(--ck-color-button-action-hover-background)}.ck.ck-button-action:not(.ck-disabled):active,a.ck.ck-button-action:not(.ck-disabled):active{background:var(--ck-color-button-action-active-background);box-shadow:inset 0 2px 2px 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i=n(42);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=".ck.ck-editor{position:relative}.ck.ck-editor .ck-editor__top .ck-sticky-panel .ck-toolbar{z-index:var(--ck-z-modal)}.ck.ck-editor__top .ck-sticky-panel .ck-toolbar{border-radius:0}.ck-rounded-corners .ck.ck-editor__top .ck-sticky-panel .ck-toolbar,.ck.ck-editor__top .ck-sticky-panel .ck-toolbar.ck-rounded-corners{border-radius:var(--ck-border-radius);border-bottom-left-radius:0;border-bottom-right-radius:0}.ck.ck-editor__top .ck-sticky-panel .ck-toolbar{border-bottom-width:0}.ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky .ck-toolbar{border-bottom-width:1px;border-radius:0}.ck-rounded-corners .ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky .ck-toolbar,.ck.ck-editor__top .ck-sticky-panel .ck-sticky-panel__content_sticky 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1)}.ck.ck-balloon-panel.ck-balloon-panel_visible{display:block}:root{--ck-balloon-arrow-offset:2px;--ck-balloon-arrow-height:10px;--ck-balloon-arrow-half-width:8px}.ck.ck-balloon-panel{border-radius:0}.ck-rounded-corners .ck.ck-balloon-panel,.ck.ck-balloon-panel.ck-rounded-corners{border-radius:var(--ck-border-radius)}.ck.ck-balloon-panel{box-shadow:var(--ck-drop-shadow),0 0;min-height:15px;background:var(--ck-color-panel-background);border:1px solid var(--ck-color-panel-border)}.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:after,.ck.ck-balloon-panel.ck-balloon-panel_with-arrow:before{width:0;height:0;border-style:solid}.ck.ck-balloon-panel[class*=arrow_n]:after,.ck.ck-balloon-panel[class*=arrow_n]:before{border-left-width:var(--ck-balloon-arrow-half-width);border-bottom-width:var(--ck-balloon-arrow-height);border-right-width:var(--ck-balloon-arrow-half-width);border-top-width:0}.ck.ck-balloon-panel[class*=arrow_n]:before{border-bottom-color:var(--ck-color-panel-border)}.ck.ck-balloon-panel[class*=arrow_n]:after,.ck.ck-balloon-panel[class*=arrow_n]:before{border-left-color:transparent;border-right-color:transparent;border-top-color:transparent}.ck.ck-balloon-panel[class*=arrow_n]:after{border-bottom-color:var(--ck-color-panel-background);margin-top:var(--ck-balloon-arrow-offset)}.ck.ck-balloon-panel[class*=arrow_s]:after,.ck.ck-balloon-panel[class*=arrow_s]:before{border-left-width:var(--ck-balloon-arrow-half-width);border-bottom-width:0;border-right-width:var(--ck-balloon-arrow-half-width);border-top-width:var(--ck-balloon-arrow-height)}.ck.ck-balloon-panel[class*=arrow_s]:before{border-top-color:var(--ck-color-panel-border)}.ck.ck-balloon-panel[class*=arrow_s]:after,.ck.ck-balloon-panel[class*=arrow_s]:before{border-left-color:transparent;border-bottom-color:transparent;border-right-color:transparent}.ck.ck-balloon-panel[class*=arrow_s]:after{border-top-color:var(--ck-color-panel-background);margin-bottom:var(--ck-balloon-arrow-offset)}.ck.ck-balloon-panel.ck-balloon-panel_arrow_n:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_n:before{left:50%;margin-left:calc(-1*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_nw:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_nw:before{left:calc(2*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_ne:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_ne:before{right:calc(2*var(--ck-balloon-arrow-half-width));top:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_s:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_s:before{left:50%;margin-left:calc(-1*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_sw:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_sw:before{left:calc(2*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}.ck.ck-balloon-panel.ck-balloon-panel_arrow_se:after,.ck.ck-balloon-panel.ck-balloon-panel_arrow_se:before{right:calc(2*var(--ck-balloon-arrow-half-width));bottom:calc(-1*var(--ck-balloon-arrow-height))}'},function(t,e,n){var i=n(58);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=".ck .ck-balloon-rotator__navigation{display:flex;align-items:center;justify-content:center}.ck .ck-balloon-rotator__content .ck-toolbar{justify-content:center}.ck .ck-balloon-rotator__navigation{background:var(--ck-color-toolbar-background);border-bottom:1px solid var(--ck-color-toolbar-border);padding:0 var(--ck-spacing-small)}.ck .ck-balloon-rotator__navigation>*{margin-right:var(--ck-spacing-small);margin-top:var(--ck-spacing-small);margin-bottom:var(--ck-spacing-small)}.ck .ck-balloon-rotator__navigation .ck-balloon-rotator__counter{margin-right:var(--ck-spacing-standard);margin-left:var(--ck-spacing-small)}.ck .ck-balloon-rotator__content .ck.ck-annotation-wrapper{box-shadow:none}"},function(t,e,n){var i=n(60);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=".ck .ck-fake-panel{position:absolute;z-index:calc(var(--ck-z-modal) - 1)}.ck .ck-fake-panel div{position:absolute}.ck .ck-fake-panel div:first-child{z-index:2}.ck .ck-fake-panel div:nth-child(2){z-index:1}:root{--ck-balloon-fake-panel-offset-horizontal:6px;--ck-balloon-fake-panel-offset-vertical:6px}.ck .ck-fake-panel div{box-shadow:var(--ck-drop-shadow),0 0;min-height:15px;background:var(--ck-color-panel-background);border:1px solid var(--ck-color-panel-border);border-radius:var(--ck-border-radius);width:100%;height:100%}.ck .ck-fake-panel div:first-child{margin-left:var(--ck-balloon-fake-panel-offset-horizontal);margin-top:var(--ck-balloon-fake-panel-offset-vertical)}.ck .ck-fake-panel div:nth-child(2){margin-left:calc(var(--ck-balloon-fake-panel-offset-horizontal)*2);margin-top:calc(var(--ck-balloon-fake-panel-offset-vertical)*2)}.ck .ck-fake-panel div:nth-child(3){margin-left:calc(var(--ck-balloon-fake-panel-offset-horizontal)*3);margin-top:calc(var(--ck-balloon-fake-panel-offset-vertical)*3)}.ck .ck-balloon-panel_arrow_s+.ck-fake-panel,.ck .ck-balloon-panel_arrow_se+.ck-fake-panel,.ck .ck-balloon-panel_arrow_sw+.ck-fake-panel{--ck-balloon-fake-panel-offset-vertical:-6px}"},function(t,e,n){var i=n(62);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=".ck-content .image{display:table;clear:both;text-align:center;margin:1em auto}.ck-content .image>img{display:block;margin:0 auto;max-width:100%;min-width:50px}"},function(t,e,n){var i=n(64);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=".ck.ck-editor__editable .image{position:relative}.ck.ck-editor__editable .image 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o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports='.ck-image-upload-complete-icon{display:block;position:absolute;top:10px;right:10px;border-radius:50%}.ck-image-upload-complete-icon:after{content:"";position:absolute}:root{--ck-color-image-upload-icon:#fff;--ck-color-image-upload-icon-background:#008a00;--ck-image-upload-icon-size:20px;--ck-image-upload-icon-width:2px}.ck-image-upload-complete-icon{width:var(--ck-image-upload-icon-size);height:var(--ck-image-upload-icon-size);opacity:0;background:var(--ck-color-image-upload-icon-background);animation-name:ck-upload-complete-icon-show,ck-upload-complete-icon-hide;animation-fill-mode:forwards,forwards;animation-duration:.5s,.5s;font-size:var(--ck-image-upload-icon-size);animation-delay:0ms,3s}.ck-image-upload-complete-icon:after{left:25%;top:50%;opacity:0;height:0;width:0;transform:scaleX(-1) rotate(135deg);transform-origin:left top;border-top:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);border-right:var(--ck-image-upload-icon-width) solid var(--ck-color-image-upload-icon);animation-name:ck-upload-complete-icon-check;animation-duration:.5s;animation-delay:.5s;animation-fill-mode:forwards;box-sizing:border-box}@keyframes ck-upload-complete-icon-show{0%{opacity:0}to{opacity:1}}@keyframes ck-upload-complete-icon-hide{0%{opacity:1}to{opacity:0}}@keyframes ck-upload-complete-icon-check{0%{opacity:1;width:0;height:0}33%{width:.3em;height:0}to{opacity:1;width:.3em;height:.45em}}'},function(t,e,n){var i=n(68);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports='.ck .ck-upload-placeholder-loader{position:absolute;display:flex;align-items:center;justify-content:center;top:0;left:0}.ck .ck-upload-placeholder-loader:before{content:"";position:relative}:root{--ck-color-upload-placeholder-loader:#b3b3b3;--ck-upload-placeholder-loader-size:32px}.ck .ck-image-upload-placeholder{width:100%;margin:0}.ck .ck-upload-placeholder-loader{width:100%;height:100%}.ck .ck-upload-placeholder-loader:before{width:var(--ck-upload-placeholder-loader-size);height:var(--ck-upload-placeholder-loader-size);border-radius:50%;border-top:3px solid var(--ck-color-upload-placeholder-loader);border-right:2px solid transparent;animation:ck-upload-placeholder-loader 1s linear infinite}@keyframes ck-upload-placeholder-loader{to{transform:rotate(1turn)}}'},function(t,e){t.exports=".ck.ck-heading_heading1{font-size:20px}.ck.ck-heading_heading2{font-size:17px}.ck.ck-heading_heading3{font-size:14px}.ck[class*=ck-heading_heading]{font-weight:700}.ck.ck-dropdown.ck-heading-dropdown .ck-dropdown__button .ck-button__label{width:8em}.ck.ck-dropdown.ck-heading-dropdown .ck-dropdown__panel .ck-list__item{min-width:18em}"},function(t,e,n){var i=n(71);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=".ck-content .image>figcaption{display:table-caption;caption-side:bottom;word-break:break-word;color:#333;background-color:#f7f7f7;padding:.6em;font-size:.75em;outline-offset:-1px}"},function(t,e,n){var i=n(73);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=":root{--ck-image-style-spacing:1.5em}.ck-content .image-style-align-center,.ck-content .image-style-align-left,.ck-content .image-style-align-right,.ck-content .image-style-side{max-width:50%}.ck-content .image-style-side{float:right;margin-left:var(--ck-image-style-spacing)}.ck-content .image-style-align-left{float:left;margin-right:var(--ck-image-style-spacing)}.ck-content .image-style-align-center{margin-left:auto;margin-right:auto}.ck-content .image-style-align-right{float:right;margin-left:var(--ck-image-style-spacing)}"},function(t,e,n){var i=n(75);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=".ck.ck-link-form{display:flex}.ck.ck-link-form .ck-label{display:none}@media screen and (max-width:600px){.ck.ck-link-form{flex-wrap:wrap}.ck.ck-link-form .ck-labeled-input{flex-basis:100%}.ck.ck-link-form .ck-button{flex-basis:50%}}.ck.ck-link-form_layout-vertical{display:block}.ck.ck-link-form{padding:var(--ck-spacing-standard)}.ck.ck-link-form:focus{outline:none}[dir=ltr] .ck.ck-link-form>:not(:first-child),[dir=rtl] .ck.ck-link-form>:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-form{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-link-form .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-form .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-link-form .ck-button{padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-link-form .ck-button{margin-left:0}[dir=ltr] .ck.ck-link-form .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-form .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}}.ck.ck-link-form_layout-vertical{padding:0;min-width:var(--ck-input-text-width)}.ck.ck-link-form_layout-vertical .ck-labeled-input{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) var(--ck-spacing-small)}.ck.ck-link-form_layout-vertical .ck-labeled-input .ck-input-text{min-width:0;width:100%}.ck.ck-link-form_layout-vertical .ck-button{padding:var(--ck-spacing-standard);margin:0;border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border);width:50%}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=ltr] .ck.ck-link-form_layout-vertical .ck-button:first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button{margin-left:0}[dir=rtl] .ck.ck-link-form_layout-vertical .ck-button:last-of-type{border-right:1px solid var(--ck-color-base-border)}.ck.ck-link-form_layout-vertical .ck.ck-list{margin-left:0}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton{border:0;width:100%}.ck.ck-link-form_layout-vertical .ck.ck-list .ck-button.ck-switchbutton:hover{background:none}"},function(t,e,n){var i=n(77);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports=".ck.ck-link-actions{display:flex;flex-direction:row;flex-wrap:nowrap}.ck.ck-link-actions .ck-link-actions__preview{display:inline-block}.ck.ck-link-actions .ck-link-actions__preview .ck-button__label{overflow:hidden}@media screen and (max-width:600px){.ck.ck-link-actions{flex-wrap:wrap}.ck.ck-link-actions .ck-link-actions__preview{flex-basis:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){flex-basis:50%}}.ck.ck-link-actions{padding:var(--ck-spacing-standard)}.ck.ck-link-actions .ck-button.ck-link-actions__preview{padding-left:0;padding-right:0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{padding:0 var(--ck-spacing-medium);color:var(--ck-color-link-default);text-overflow:ellipsis;cursor:pointer;max-width:var(--ck-input-text-width);min-width:3em;text-align:center}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label:hover{text-decoration:underline}.ck.ck-link-actions .ck-button.ck-link-actions__preview,.ck.ck-link-actions .ck-button.ck-link-actions__preview:active,.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus,.ck.ck-link-actions .ck-button.ck-link-actions__preview:hover{background:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:active{box-shadow:none}.ck.ck-link-actions .ck-button.ck-link-actions__preview:focus .ck-button__label{text-decoration:underline}.ck.ck-link-actions:focus{outline:none}[dir=ltr] .ck.ck-link-actions .ck-button:not(:first-child),[dir=rtl] .ck.ck-link-actions .ck-button:not(:last-child){margin-left:var(--ck-spacing-standard)}@media screen and (max-width:600px){.ck.ck-link-actions{padding:0;width:calc(0.8*var(--ck-input-text-width))}.ck.ck-link-actions .ck-button.ck-link-actions__preview{margin:var(--ck-spacing-standard) var(--ck-spacing-standard) 0}.ck.ck-link-actions .ck-button.ck-link-actions__preview .ck-button__label{min-width:0;max-width:100%}.ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){padding:var(--ck-spacing-standard);margin-top:var(--ck-spacing-standard);border-radius:0;border:0;border-top:1px solid var(--ck-color-base-border)}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){margin-left:0}[dir=ltr] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview):first-of-type{border-right:1px solid var(--ck-color-base-border)}[dir=rtl] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview){margin-left:0}[dir=rtl] .ck.ck-link-actions .ck-button:not(.ck-link-actions__preview):last-of-type{border-right:1px solid var(--ck-color-base-border)}}"},function(t,e,n){var i=n(79);"string"==typeof i&&(i=[[t.i,i,""]]);var o={injectType:"singletonStyleTag",insert:"head",singleton:!0};n(1)(i,o);i.locals&&(t.exports=i.locals)},function(t,e){t.exports='.ck-media__wrapper 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Map}),Object.defineProperty(t,Bi,{value:new Map}))}function qi(...t){const e=function(...t){if(!t.length)throw new Qn.b("observable-bind-to-parse-error: Invalid argument syntax in `to()`.",null);const e={to:[]};let n;"function"==typeof t[t.length-1]&&(e.callback=t.pop());return t.forEach(t=>{if("string"==typeof t)n.properties.push(t);else{if("object"!=typeof t)throw new Qn.b("observable-bind-to-parse-error: Invalid argument syntax in `to()`.",null);n={observable:t,properties:[]},e.to.push(n)}}),e}(...t),n=Array.from(this._bindings.keys()),i=n.length;if(!e.callback&&e.to.length>1)throw new Qn.b("observable-bind-to-no-callback: Binding multiple observables only possible with callback.",this);if(i>1&&e.callback)throw new Qn.b("observable-bind-to-extra-callback: Cannot bind multiple properties and use a callback in one binding.",this);var o;e.to.forEach(t=>{if(t.properties.length&&t.properties.length!==i)throw new Qn.b("observable-bind-to-properties-length: The number of properties must match.",this);t.properties.length||(t.properties=this._bindProperties)}),this._to=e.to,e.callback&&(this._bindings.get(n[0]).callback=e.callback),o=this._observable,this._to.forEach(t=>{const e=o[zi];let n;e.get(t.observable)||o.listenTo(t.observable,"change",(i,r)=>{(n=e.get(t.observable)[r])&&n.forEach(t=>{$i(o,t.property)})})}),function(t){let e;t._bindings.forEach((n,i)=>{t._to.forEach(o=>{e=o.properties[n.callback?0:t._bindProperties.indexOf(i)],n.to.push([o.observable,e]),function(t,e,n,i){const o=t[zi],r=o.get(n),s=r||{};s[i]||(s[i]=new Set);s[i].add(e),r||o.set(n,s)}(t._observable,n,o.observable,e)})})}(this),this._bindProperties.forEach(t=>{$i(this._observable,t)})}function Wi(t,e,n){if(this._bindings.size>1)throw new Qn.b("observable-bind-to-many-not-one-binding: Cannot bind multiple properties with toMany().",this);this.to(...function(t,e){const n=t.map(t=>[t,e]);return Array.prototype.concat.apply([],n)}(t,e),n)}function Yi(t){return t.every(t=>"string"==typeof t)}function $i(t,e){const n=t[Bi].get(e);let i;i=n.callback?n.callback.apply(t,n.to.map(t=>t[0][t[1]])):(i=n.to[0])[0][i[1]],t.hasOwnProperty(e)?t[e]=i:t.set(e,i)}const Gi=Symbol("document");class Qi extends xi{constructor(t,e,n){super(t,e,n),this.set("isReadOnly",!1),this.set("isFocused",!1)}is(t,e=null){const n=t&&t.replace(/^view:/,"");return e?"editableElement"==n&&e==this.name||super.is(t,e):"editableElement"==n||super.is(t)}destroy(){this.stopListening()}get document(){return this.getCustomProperty(Gi)}set _document(t){if(this.getCustomProperty(Gi))throw new Qn.b("view-editableelement-document-already-set: View document is already set.",this);this._setCustomProperty(Gi,t),this.bind("isReadOnly").to(t),this.bind("isFocused").to(t,"isFocused",e=>e&&t.selection.editableElement==this),this.listenTo(t.selection,"change",()=>{this.isFocused=t.isFocused&&t.selection.editableElement==this})}}li(Qi,Ui);const Ki=Symbol("rootName");class Ji extends Qi{constructor(t){super(t),this.rootName="main"}is(t,e=null){const n=t.replace(/^view:/,"");return e?"rootElement"==n&&e==this.name||super.is(t,e):"rootElement"==n||super.is(t)}get rootName(){return this.getCustomProperty(Ki)}set rootName(t){this._setCustomProperty(Ki,t)}set _name(t){this.name=t}}class Zi{constructor(t={}){if(!t.boundaries&&!t.startPosition)throw new Qn.b("view-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.",null);if(t.direction&&"forward"!=t.direction&&"backward"!=t.direction)throw new Qn.b("view-tree-walker-unknown-direction: Only `backward` and `forward` direction allowed.",t.startPosition,{direction:t.direction});this.boundaries=t.boundaries||null,t.startPosition?this.position=Xi._createAt(t.startPosition):this.position=Xi._createAt(t.boundaries["backward"==t.direction?"end":"start"]),this.direction=t.direction||"forward",this.singleCharacters=!!t.singleCharacters,this.shallow=!!t.shallow,this.ignoreElementEnd=!!t.ignoreElementEnd,this._boundaryStartParent=this.boundaries?this.boundaries.start.parent:null,this._boundaryEndParent=this.boundaries?this.boundaries.end.parent:null}[Symbol.iterator](){return this}skip(t){let e,n,i;do{i=this.position,({done:e,value:n}=this.next())}while(!e&&t(n));e||(this.position=i)}next(){return"forward"==this.direction?this._next():this._previous()}_next(){let t=this.position.clone();const e=this.position,n=t.parent;if(null===n.parent&&t.offset===n.childCount)return{done:!0};if(n===this._boundaryEndParent&&t.offset==this.boundaries.end.offset)return{done:!0};let i;if(n instanceof gi){if(t.isAtEnd)return this.position=Xi._createAfter(n),this._next();i=n.data[t.offset]}else i=n.getChild(t.offset);if(i instanceof _i)return this.shallow?t.offset++:t=new Xi(i,0),this.position=t,this._formatReturnValue("elementStart",i,e,t,1);if(i instanceof gi){if(this.singleCharacters)return t=new Xi(i,0),this.position=t,this._next();{let n,o=i.data.length;return i==this._boundaryEndParent?(o=this.boundaries.end.offset,n=new mi(i,0,o),t=Xi._createAfter(n)):(n=new mi(i,0,i.data.length),t.offset++),this.position=t,this._formatReturnValue("text",n,e,t,o)}}if("string"==typeof i){let i;if(this.singleCharacters)i=1;else{i=(n===this._boundaryEndParent?this.boundaries.end.offset:n.data.length)-t.offset}const o=new mi(n,t.offset,i);return t.offset+=i,this.position=t,this._formatReturnValue("text",o,e,t,i)}return t=Xi._createAfter(n),this.position=t,this.ignoreElementEnd?this._next():this._formatReturnValue("elementEnd",n,e,t)}_previous(){let t=this.position.clone();const e=this.position,n=t.parent;if(null===n.parent&&0===t.offset)return{done:!0};if(n==this._boundaryStartParent&&t.offset==this.boundaries.start.offset)return{done:!0};let i;if(n instanceof gi){if(t.isAtStart)return this.position=Xi._createBefore(n),this._previous();i=n.data[t.offset-1]}else i=n.getChild(t.offset-1);if(i instanceof _i)return this.shallow?(t.offset--,this.position=t,this._formatReturnValue("elementStart",i,e,t,1)):(t=new Xi(i,i.childCount),this.position=t,this.ignoreElementEnd?this._previous():this._formatReturnValue("elementEnd",i,e,t));if(i instanceof gi){if(this.singleCharacters)return t=new Xi(i,i.data.length),this.position=t,this._previous();{let n,o=i.data.length;if(i==this._boundaryStartParent){const e=this.boundaries.start.offset;o=(n=new mi(i,e,i.data.length-e)).data.length,t=Xi._createBefore(n)}else n=new mi(i,0,i.data.length),t.offset--;return this.position=t,this._formatReturnValue("text",n,e,t,o)}}if("string"==typeof i){let i;if(this.singleCharacters)i=1;else{const e=n===this._boundaryStartParent?this.boundaries.start.offset:0;i=t.offset-e}t.offset-=i;const o=new mi(n,t.offset,i);return this.position=t,this._formatReturnValue("text",o,e,t,i)}return t=Xi._createBefore(n),this.position=t,this._formatReturnValue("elementStart",n,e,t,1)}_formatReturnValue(t,e,n,i,o){return e instanceof mi&&(e.offsetInText+e.data.length==e.textNode.data.length&&("forward"!=this.direction||this.boundaries&&this.boundaries.end.isEqual(this.position)?n=Xi._createAfter(e.textNode):(i=Xi._createAfter(e.textNode),this.position=i)),0===e.offsetInText&&("backward"!=this.direction||this.boundaries&&this.boundaries.start.isEqual(this.position)?n=Xi._createBefore(e.textNode):(i=Xi._createBefore(e.textNode),this.position=i))),{done:!1,value:{type:t,item:e,previousPosition:n,nextPosition:i,length:o}}}}class Xi{constructor(t,e){this.parent=t,this.offset=e}get nodeAfter(){return this.parent.is("text")?null:this.parent.getChild(this.offset)||null}get nodeBefore(){return this.parent.is("text")?null:this.parent.getChild(this.offset-1)||null}get isAtStart(){return 0===this.offset}get isAtEnd(){const t=this.parent.is("text")?this.parent.data.length:this.parent.childCount;return this.offset===t}get root(){return this.parent.root}get editableElement(){let t=this.parent;for(;!(t instanceof Qi);){if(!t.parent)return null;t=t.parent}return t}getShiftedBy(t){const e=Xi._createAt(this),n=e.offset+t;return e.offset=n<0?0:n,e}getLastMatchingPosition(t,e={}){e.startPosition=this;const n=new Zi(e);return n.skip(t),n.position}getAncestors(){return this.parent.is("documentFragment")?[this.parent]:this.parent.getAncestors({includeSelf:!0})}getCommonAncestor(t){const e=this.getAncestors(),n=t.getAncestors();let i=0;for(;e[i]==n[i]&&e[i];)i++;return 0===i?null:e[i-1]}is(t){return"position"==t||"view:position"==t}isEqual(t){return this.parent==t.parent&&this.offset==t.offset}isBefore(t){return"before"==this.compareWith(t)}isAfter(t){return"after"==this.compareWith(t)}compareWith(t){if(this.root!==t.root)return"different";if(this.isEqual(t))return"same";const e=this.parent.is("node")?this.parent.getPath():[],n=t.parent.is("node")?t.parent.getPath():[];e.push(this.offset),n.push(t.offset);const i=di(e,n);switch(i){case"prefix":return"before";case"extension":return"after";default:return e[i]0?new this(n,i):new this(i,n)}static _createIn(t){return this._createFromParentsAndOffsets(t,0,t,t.childCount)}static _createOn(t){const e=t.is("textProxy")?t.offsetSize:1;return this._createFromPositionAndShift(Xi._createBefore(t),e)}}function eo(t){return!(!t.item.is("attributeElement")&&!t.item.is("uiElement"))}function no(t){let e=0;for(const n of t)e++;return e}class io{constructor(t=null,e,n){this._ranges=[],this._lastRangeBackward=!1,this._isFake=!1,this._fakeSelectionLabel="",this.setTo(t,e,n)}get isFake(){return this._isFake}get fakeSelectionLabel(){return this._fakeSelectionLabel}get anchor(){if(!this._ranges.length)return null;const t=this._ranges[this._ranges.length-1];return(this._lastRangeBackward?t.end:t.start).clone()}get focus(){if(!this._ranges.length)return null;const t=this._ranges[this._ranges.length-1];return(this._lastRangeBackward?t.start:t.end).clone()}get isCollapsed(){return 1===this.rangeCount&&this._ranges[0].isCollapsed}get rangeCount(){return this._ranges.length}get isBackward(){return!this.isCollapsed&&this._lastRangeBackward}get editableElement(){return this.anchor?this.anchor.editableElement:null}*getRanges(){for(const t of this._ranges)yield t.clone()}getFirstRange(){let t=null;for(const e of this._ranges)t&&!e.start.isBefore(t.start)||(t=e);return t?t.clone():null}getLastRange(){let t=null;for(const e of this._ranges)t&&!e.end.isAfter(t.end)||(t=e);return t?t.clone():null}getFirstPosition(){const t=this.getFirstRange();return t?t.start.clone():null}getLastPosition(){const t=this.getLastRange();return t?t.end.clone():null}isEqual(t){if(this.isFake!=t.isFake)return!1;if(this.isFake&&this.fakeSelectionLabel!=t.fakeSelectionLabel)return!1;if(this.rangeCount!=t.rangeCount)return!1;if(0===this.rangeCount)return!0;if(!this.anchor.isEqual(t.anchor)||!this.focus.isEqual(t.focus))return!1;for(const e of this._ranges){let n=!1;for(const i of t._ranges)if(e.isEqual(i)){n=!0;break}if(!n)return!1}return!0}isSimilar(t){if(this.isBackward!=t.isBackward)return!1;const e=no(this.getRanges());if(e!=no(t.getRanges()))return!1;if(0==e)return!0;for(let e of this.getRanges()){e=e.getTrimmed();let n=!1;for(let i of t.getRanges())if(i=i.getTrimmed(),e.start.isEqual(i.start)&&e.end.isEqual(i.end)){n=!0;break}if(!n)return!1}return!0}getSelectedElement(){if(1!==this.rangeCount)return null;const t=this.getFirstRange();let e=t.start.nodeAfter,n=t.end.nodeBefore;return t.start.parent.is("text")&&t.start.isAtEnd&&t.start.parent.nextSibling&&(e=t.start.parent.nextSibling),t.end.parent.is("text")&&t.end.isAtStart&&t.end.parent.previousSibling&&(n=t.end.parent.previousSibling),e instanceof _i&&e==n?e:null}setTo(t,e,n){if(null===t)this._setRanges([]),this._setFakeOptions(e);else if(t instanceof io||t instanceof oo)this._setRanges(t.getRanges(),t.isBackward),this._setFakeOptions({fake:t.isFake,label:t.fakeSelectionLabel});else if(t instanceof to)this._setRanges([t],e&&e.backward),this._setFakeOptions(e);else if(t instanceof Xi)this._setRanges([new to(t)]),this._setFakeOptions(e);else if(t instanceof fi){const i=!!n&&!!n.backward;let o;if(void 0===e)throw new Qn.b("view-selection-setTo-required-second-parameter: selection.setTo requires the second parameter when the first parameter is a node.",this);o="in"==e?to._createIn(t):"on"==e?to._createOn(t):new to(Xi._createAt(t,e)),this._setRanges([o],i),this._setFakeOptions(n)}else{if(!bi(t))throw new Qn.b("view-selection-setTo-not-selectable: Cannot set selection to given place.",this);this._setRanges(t,e&&e.backward),this._setFakeOptions(e)}this.fire("change")}setFocus(t,e){if(null===this.anchor)throw new Qn.b("view-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.",this);const n=Xi._createAt(t,e);if("same"==n.compareWith(this.focus))return;const i=this.anchor;this._ranges.pop(),"before"==n.compareWith(i)?this._addRange(new to(n,i),!0):this._addRange(new to(i,n)),this.fire("change")}is(t){return"selection"==t||"view:selection"==t}_setRanges(t,e=!1){t=Array.from(t),this._ranges=[];for(const e of t)this._addRange(e);this._lastRangeBackward=!!e}_setFakeOptions(t={}){this._isFake=!!t.fake,this._fakeSelectionLabel=t.fake&&t.label||""}_addRange(t,e=!1){if(!(t instanceof to))throw new Qn.b("view-selection-add-range-not-range: Selection range set to an object that is not an instance of view.Range",this);this._pushRange(t),this._lastRangeBackward=!!e}_pushRange(t){for(const e of this._ranges)if(t.isIntersecting(e))throw new Qn.b("view-selection-range-intersects: Trying to add a range that intersects with another range from selection.",this,{addedRange:t,intersectingRange:e});this._ranges.push(new to(t.start,t.end))}}li(io,ni);class oo{constructor(t=null,e,n){this._selection=new io,this._selection.delegate("change").to(this),this._selection.setTo(t,e,n)}get isFake(){return this._selection.isFake}get fakeSelectionLabel(){return this._selection.fakeSelectionLabel}get anchor(){return this._selection.anchor}get focus(){return this._selection.focus}get isCollapsed(){return this._selection.isCollapsed}get rangeCount(){return this._selection.rangeCount}get isBackward(){return this._selection.isBackward}get editableElement(){return this._selection.editableElement}get _ranges(){return this._selection._ranges}*getRanges(){yield*this._selection.getRanges()}getFirstRange(){return this._selection.getFirstRange()}getLastRange(){return this._selection.getLastRange()}getFirstPosition(){return this._selection.getFirstPosition()}getLastPosition(){return this._selection.getLastPosition()}getSelectedElement(){return this._selection.getSelectedElement()}isEqual(t){return this._selection.isEqual(t)}isSimilar(t){return this._selection.isSimilar(t)}is(t){return"selection"==t||"documentSelection"==t||"view:selection"==t||"view:documentSelection"==t}_setTo(t,e,n){this._selection.setTo(t,e,n)}_setFocus(t,e){this._selection.setFocus(t,e)}}li(oo,ni);class ro{constructor(t={}){this._items=[],this._itemMap=new Map,this._idProperty=t.idProperty||"id",this._bindToExternalToInternalMap=new WeakMap,this._bindToInternalToExternalMap=new WeakMap,this._skippedIndexesFromExternal=[]}get length(){return this._items.length}get first(){return this._items[0]||null}get last(){return this._items[this.length-1]||null}add(t,e){let n;const i=this._idProperty;if(i in t){if("string"!=typeof(n=t[i]))throw new Qn.b("collection-add-invalid-id",this);if(this.get(n))throw new Qn.b("collection-add-item-already-exists",this)}else t[i]=n=Zn();if(void 0===e)e=this._items.length;else if(e>this._items.length||e<0)throw new Qn.b("collection-add-item-invalid-index",this);return this._items.splice(e,0,t),this._itemMap.set(n,t),this.fire("add",t,e),this}get(t){let e;if("string"==typeof t)e=this._itemMap.get(t);else{if("number"!=typeof t)throw new Qn.b("collection-get-invalid-arg: Index or id must be given.",this);e=this._items[t]}return e||null}has(t){if("string"==typeof t)return this._itemMap.has(t);{const e=t[this._idProperty];return this._itemMap.has(e)}}getIndex(t){let e;return e="string"==typeof t?this._itemMap.get(t):t,this._items.indexOf(e)}remove(t){let e,n,i,o=!1;const r=this._idProperty;if("string"==typeof t?(n=t,o=!(i=this._itemMap.get(n)),i&&(e=this._items.indexOf(i))):"number"==typeof t?(e=t,o=!(i=this._items[e]),i&&(n=i[r])):(n=(i=t)[r],o=-1==(e=this._items.indexOf(i))||!this._itemMap.get(n)),o)throw new Qn.b("collection-remove-404: Item not found.",this);this._items.splice(e,1),this._itemMap.delete(n);const s=this._bindToInternalToExternalMap.get(i);return this._bindToInternalToExternalMap.delete(i),this._bindToExternalToInternalMap.delete(s),this.fire("remove",i,e),i}map(t,e){return this._items.map(t,e)}find(t,e){return this._items.find(t,e)}filter(t,e){return this._items.filter(t,e)}clear(){for(this._bindToCollection&&(this.stopListening(this._bindToCollection),this._bindToCollection=null);this.length;)this.remove(0)}bindTo(t){if(this._bindToCollection)throw new Qn.b("collection-bind-to-rebind: The collection cannot be bound more than once.",this);return this._bindToCollection=t,{as:t=>{this._setUpBindToBinding(e=>new t(e))},using:t=>{"function"==typeof t?this._setUpBindToBinding(e=>t(e)):this._setUpBindToBinding(e=>e[t])}}}_setUpBindToBinding(t){const e=this._bindToCollection,n=(n,i,o)=>{const r=e._bindToCollection==this,s=e._bindToInternalToExternalMap.get(i);if(r&&s)this._bindToExternalToInternalMap.set(i,s),this._bindToInternalToExternalMap.set(s,i);else{const n=t(i);if(!n)return void this._skippedIndexesFromExternal.push(o);let r=o;for(const t of this._skippedIndexesFromExternal)o>t&&r--;for(const t of e._skippedIndexesFromExternal)r>=t&&r++;this._bindToExternalToInternalMap.set(i,n),this._bindToInternalToExternalMap.set(n,i),this.add(n,r);for(let t=0;t{const i=this._bindToExternalToInternalMap.get(e);i&&this.remove(i),this._skippedIndexesFromExternal=this._skippedIndexesFromExternal.reduce((t,e)=>(ne&&t.push(e),t),[])})}[Symbol.iterator](){return this._items[Symbol.iterator]()}}li(ro,ni);class so{constructor(){this.selection=new oo,this.roots=new ro({idProperty:"rootName"}),this.set("isReadOnly",!1),this.set("isFocused",!1),this.set("isComposing",!1),this._postFixers=new Set}getRoot(t="main"){return this.roots.get(t)}registerPostFixer(t){this._postFixers.add(t)}destroy(){this.roots.map(t=>t.destroy()),this.stopListening()}_callPostFixers(t){let e=!1;do{for(const n of this._postFixers)if(e=n(t))break}while(e)}}li(so,Ui);const ao=10;class co extends _i{constructor(t,e,n){super(t,e,n),this.getFillerOffset=lo,this._priority=ao,this._id=null,this._clonesGroup=null}get priority(){return this._priority}get id(){return this._id}getElementsWithSameId(){if(null===this.id)throw new Qn.b("attribute-element-get-elements-with-same-id-no-id: Cannot get elements with the same id for an attribute element without id.",this);return new Set(this._clonesGroup)}is(t,e=null){const n=t&&t.replace(/^view:/,"");return e?"attributeElement"==n&&e==this.name||super.is(t,e):"attributeElement"==n||super.is(t)}isSimilar(t){return null!==this.id||null!==t.id?this.id===t.id:super.isSimilar(t)&&this.priority==t.priority}_clone(t){const e=super._clone(t);return e._priority=this._priority,e._id=this._id,e}}function lo(){if(ho(this))return null;let t=this.parent;for(;t&&t.is("attributeElement");){if(ho(t)>1)return null;t=t.parent}return!t||ho(t)>1?null:this.childCount}function ho(t){return Array.from(t.getChildren()).filter(t=>!t.is("uiElement")).length}co.DEFAULT_PRIORITY=ao;class uo extends _i{constructor(t,e,n){super(t,e,n),this.getFillerOffset=fo}is(t,e=null){const n=t.replace(/^view:/,"");return e?"emptyElement"==n&&e==this.name||super.is(t,e):"emptyElement"==n||super.is(t)}_insertChild(t,e){if(e&&(e instanceof fi||Array.from(e).length>0))throw new Qn.b("view-emptyelement-cannot-add: Cannot add child nodes to EmptyElement instance.",[this,e])}}function fo(){return null}const go=navigator.userAgent.toLowerCase();var mo={isMac:function(t){return t.indexOf("macintosh")>-1}(go),isEdge:function(t){return!!t.match(/edge\/(\d+.?\d*)/)}(go),isGecko:function(t){return!!t.match(/gecko\/\d+/)}(go),isSafari:function(t){return t.indexOf(" applewebkit/")>-1&&-1===t.indexOf("chrome")}(go),isAndroid:function(t){return t.indexOf("android")>-1}(go),features:{isRegExpUnicodePropertySupported:function(){let t=!1;try{t=0==="ć".search(new RegExp("[\\p{L}]","u"))}catch(t){}return t}()}};const po={"⌘":"ctrl","⇧":"shift","⌥":"alt"},bo={ctrl:"⌘",shift:"⇧",alt:"⌥"},wo=function(){const t={arrowleft:37,arrowup:38,arrowright:39,arrowdown:40,backspace:8,delete:46,enter:13,space:32,esc:27,tab:9,ctrl:1114112,cmd:1114112,shift:2228224,alt:4456448};for(let e=65;e<=90;e++){const n=String.fromCharCode(e);t[n.toLowerCase()]=e}for(let e=48;e<=57;e++)t[e-48]=e;for(let e=112;e<=123;e++)t["f"+(e-111)]=e;return t}();function ko(t){let e;if("string"==typeof t){if(!(e=wo[t.toLowerCase()]))throw new Qn.b("keyboard-unknown-key: Unknown key name.",null,{key:t})}else e=t.keyCode+(t.altKey?wo.alt:0)+(t.ctrlKey?wo.ctrl:0)+(t.shiftKey?wo.shift:0);return e}function _o(t){return"string"==typeof t&&(t=yo(t)),t.map(t=>"string"==typeof t?ko(t):t).reduce((t,e)=>e+t,0)}function vo(t){return mo.isMac?yo(t).map(t=>bo[t.toLowerCase()]||t).reduce((t,e)=>t.slice(-1)in po?t+e:t+"+"+e):t}function yo(t){return t.split(/\s*\+\s*/)}class xo extends _i{constructor(t,e,n){super(t,e,n),this.getFillerOffset=To}is(t,e=null){const n=t.replace(/^view:/,"");return e?"uiElement"==n&&e==this.name||super.is(t,e):"uiElement"==n||super.is(t)}_insertChild(t,e){if(e&&(e instanceof fi||Array.from(e).length>0))throw new Qn.b("view-uielement-cannot-add: Cannot add child nodes to UIElement instance.",this)}render(t){return this.toDomElement(t)}toDomElement(t){const e=t.createElement(this.name);for(const t of this.getAttributeKeys())e.setAttribute(t,this.getAttribute(t));return e}}function Ao(t){t.document.on("keydown",(e,n)=>(function(t,e,n){if(e.keyCode==wo.arrowright){const t=e.domTarget.ownerDocument.defaultView.getSelection(),i=1==t.rangeCount&&t.getRangeAt(0).collapsed;if(i||e.shiftKey){const e=t.focusNode,o=t.focusOffset,r=n.domPositionToView(e,o);if(null===r)return;let s=!1;const a=r.getLastMatchingPosition(t=>(t.item.is("uiElement")&&(s=!0),!(!t.item.is("uiElement")&&!t.item.is("attributeElement"))));if(s){const e=n.viewPositionToDom(a);i?t.collapse(e.parent,e.offset):t.extend(e.parent,e.offset)}}}})(0,n,t.domConverter))}function To(){return null}class Co{constructor(t){this._children=[],t&&this._insertChild(0,t)}[Symbol.iterator](){return this._children[Symbol.iterator]()}get childCount(){return this._children.length}get isEmpty(){return 0===this.childCount}get root(){return this}get parent(){return null}is(t){return"documentFragment"==t||"view:documentFragment"==t}_appendChild(t){return this._insertChild(this.childCount,t)}getChild(t){return this._children[t]}getChildIndex(t){return this._children.indexOf(t)}getChildren(){return this._children[Symbol.iterator]()}_insertChild(t,e){this._fireChange("children",this);let n=0;const i=function(t){if("string"==typeof t)return[new gi(t)];bi(t)||(t=[t]);return Array.from(t).map(t=>"string"==typeof t?new gi(t):t instanceof mi?new gi(t.data):t)}(e);for(const e of i)null!==e.parent&&e._remove(),e.parent=this,this._children.splice(t,0,e),t++,n++;return n}_removeChildren(t,e=1){this._fireChange("children",this);for(let n=t;ni instanceof t))throw new Qn.b("view-writer-insert-invalid-node",n);i.is("text")||t(i.getChildren(),n)}})(e=bi(e)?[...e]:[e],this.document);const n=So(t);if(!n)throw new Qn.b("view-writer-invalid-position-container",this.document);const i=this._breakAttributes(t,!0),o=n._insertChild(i.offset,e);for(const t of e)this._addToClonedElementsGroup(t);const r=i.getShiftedBy(o),s=this.mergeAttributes(i);if(0===o)return new to(s,s);{s.isEqual(i)||r.offset--;const t=this.mergeAttributes(r);return new to(s,t)}}remove(t){const e=t instanceof to?t:to._createOn(t);if(Do(e,this.document),e.isCollapsed)return new Co;const{start:n,end:i}=this._breakAttributesRange(e,!0),o=n.parent,r=i.offset-n.offset,s=o._removeChildren(n.offset,r);for(const t of s)this._removeFromClonedElementsGroup(t);const a=this.mergeAttributes(n);return e.start=a,e.end=a.clone(),new Co(s)}clear(t,e){Do(t,this.document);const n=t.getWalker({direction:"backward",ignoreElementEnd:!0});for(const i of n){const n=i.item;let o;if(n.is("element")&&e.isSimilar(n))o=to._createOn(n);else if(!i.nextPosition.isAfter(t.start)&&n.is("textProxy")){const t=n.getAncestors().find(t=>t.is("element")&&e.isSimilar(t));t&&(o=to._createIn(t))}o&&(o.end.isAfter(t.end)&&(o.end=t.end),o.start.isBefore(t.start)&&(o.start=t.start),this.remove(o))}}move(t,e){let n;if(e.isAfter(t.end)){const i=(e=this._breakAttributes(e,!0)).parent,o=i.childCount;t=this._breakAttributesRange(t,!0),n=this.remove(t),e.offset+=i.childCount-o}else n=this.remove(t);return this.insert(e,n)}wrap(t,e){if(!(e instanceof co))throw new Qn.b("view-writer-wrap-invalid-attribute",this.document);if(Do(t,this.document),t.isCollapsed){let i=t.start;i.parent.is("element")&&(n=i.parent,!Array.from(n.getChildren()).some(t=>!t.is("uiElement")))&&(i=i.getLastMatchingPosition(t=>t.item.is("uiElement"))),i=this._wrapPosition(i,e);const o=this.document.selection;return o.isCollapsed&&o.getFirstPosition().isEqual(t.start)&&this.setSelection(i),new to(i)}return this._wrapRange(t,e);var n}unwrap(t,e){if(!(e instanceof co))throw new Qn.b("view-writer-unwrap-invalid-attribute",this.document);if(Do(t,this.document),t.isCollapsed)return t;const{start:n,end:i}=this._breakAttributesRange(t,!0),o=n.parent,r=this._unwrapChildren(o,n.offset,i.offset,e),s=this.mergeAttributes(r.start);s.isEqual(r.start)||r.end.offset--;const a=this.mergeAttributes(r.end);return new to(s,a)}rename(t,e){const n=new xi(t,e.getAttributes());return this.insert(Xi._createAfter(e),n),this.move(to._createIn(e),Xi._createAt(n,0)),this.remove(to._createOn(e)),n}clearClonedElementsGroup(t){this._cloneGroups.delete(t)}createPositionAt(t,e){return Xi._createAt(t,e)}createPositionAfter(t){return Xi._createAfter(t)}createPositionBefore(t){return Xi._createBefore(t)}createRange(t,e){return new to(t,e)}createRangeOn(t){return to._createOn(t)}createRangeIn(t){return to._createIn(t)}createSelection(t,e,n){return new io(t,e,n)}_wrapChildren(t,e,n,i){let o=e;const r=[];for(;o!1,t.parent._insertChild(t.offset,n);const i=new to(t,t.getShiftedBy(1));this.wrap(i,e);const o=new Xi(n.parent,n.index);n._remove();const r=o.nodeBefore,s=o.nodeAfter;return r instanceof gi&&s instanceof gi?No(r,s):Eo(o)}_wrapAttributeElement(t,e){if(!Lo(t,e))return!1;if(t.name!==e.name||t.priority!==e.priority)return!1;for(const n of t.getAttributeKeys())if("class"!==n&&"style"!==n&&e.hasAttribute(n)&&e.getAttribute(n)!==t.getAttribute(n))return!1;for(const n of t.getStyleNames())if(e.hasStyle(n)&&e.getStyle(n)!==t.getStyle(n))return!1;for(const n of t.getAttributeKeys())"class"!==n&&"style"!==n&&(e.hasAttribute(n)||this.setAttribute(n,t.getAttribute(n),e));for(const n of t.getStyleNames())e.hasStyle(n)||this.setStyle(n,t.getStyle(n),e);for(const n of t.getClassNames())e.hasClass(n)||this.addClass(n,e);return!0}_unwrapAttributeElement(t,e){if(!Lo(t,e))return!1;if(t.name!==e.name||t.priority!==e.priority)return!1;for(const n of t.getAttributeKeys())if("class"!==n&&"style"!==n&&(!e.hasAttribute(n)||e.getAttribute(n)!==t.getAttribute(n)))return!1;if(!e.hasClass(...t.getClassNames()))return!1;for(const n of t.getStyleNames())if(!e.hasStyle(n)||e.getStyle(n)!==t.getStyle(n))return!1;for(const n of t.getAttributeKeys())"class"!==n&&"style"!==n&&this.removeAttribute(n,e);return this.removeClass(Array.from(t.getClassNames()),e),this.removeStyle(Array.from(t.getStyleNames()),e),!0}_breakAttributesRange(t,e=!1){const n=t.start,i=t.end;if(Do(t,this.document),t.isCollapsed){const n=this._breakAttributes(t.start,e);return new to(n,n)}const o=this._breakAttributes(i,e),r=o.parent.childCount,s=this._breakAttributes(n,e);return o.offset+=o.parent.childCount-r,new to(s,o)}_breakAttributes(t,e=!1){const n=t.offset,i=t.parent;if(t.parent.is("emptyElement"))throw new Qn.b("view-writer-cannot-break-empty-element",this.document);if(t.parent.is("uiElement"))throw new Qn.b("view-writer-cannot-break-ui-element",this.document);if(!e&&i.is("text")&&Ro(i.parent))return t.clone();if(Ro(i))return t.clone();if(i.is("text"))return this._breakAttributes(Io(t),e);if(n==i.childCount){const t=new Xi(i.parent,i.index+1);return this._breakAttributes(t,e)}if(0===n){const t=new Xi(i.parent,i.index);return this._breakAttributes(t,e)}{const t=i.index+1,o=i._clone();i.parent._insertChild(t,o),this._addToClonedElementsGroup(o);const r=i.childCount-n,s=i._removeChildren(n,r);o._appendChild(s);const a=new Xi(i.parent,t);return this._breakAttributes(a,e)}}_addToClonedElementsGroup(t){if(!t.root.is("rootElement"))return;if(t.is("element"))for(const e of t.getChildren())this._addToClonedElementsGroup(e);const e=t.id;if(!e)return;let n=this._cloneGroups.get(e);n||(n=new Set,this._cloneGroups.set(e,n)),n.add(t),t._clonesGroup=n}_removeFromClonedElementsGroup(t){if(t.is("element"))for(const e of t.getChildren())this._removeFromClonedElementsGroup(e);const e=t.id;if(!e)return;const n=this._cloneGroups.get(e);n&&n.delete(t)}}function So(t){let e=t.parent;for(;!Ro(e);){if(!e)return;e=e.parent}return e}function Mo(t,e){return t.prioritye.priority)&&t.getIdentity()t.createTextNode(" "),zo=t=>{const e=t.createElement("br");return e.dataset.ckeFiller=!0,e},Bo=7,Fo=(()=>{let t="";for(let e=0;e0&&(r=r.concat(Array(n).fill("equal")));o-n>0&&(r=r.concat(Array(o-n).fill("insert")));i-n>0&&(r=r.concat(Array(i-n).fill("delete")));o0&&n.push({index:i,type:"insert",values:t.slice(i,r)});o-i>0&&n.push({index:i+(r-i),type:"delete",howMany:o-i});return n}(e,o)}function $o(t,e,n){for(let i=0;i200||o>200||i+o>300)return Qo.fastDiff(t,e,n,!0);let r,s;if(ol?-1:1;d[i+u]&&(d[i]=d[i+u].slice(0)),d[i]||(d[i]=[]),d[i].push(o>l?r:s);let f=Math.max(o,l),g=f-i;for(;gl;f--)h[f]=u(f);h[l]=u(l),g++}while(h[l]!==c);return d[l].slice(1)}function Ko(t,e,n){t.insertBefore(n,t.childNodes[e]||null)}function Jo(t){const e=t.parentNode;e&&e.removeChild(t)}function Zo(t){if(t){if(t.defaultView)return t instanceof t.defaultView.Document;if(t.ownerDocument&&t.ownerDocument.defaultView)return t instanceof t.ownerDocument.defaultView.Node}return!1}Qo.fastDiff=Yo;class Xo{constructor(t,e){this.domDocuments=new Set,this.domConverter=t,this.markedAttributes=new Set,this.markedChildren=new Set,this.markedTexts=new Set,this.selection=e,this.isFocused=!1,this._inlineFiller=null,this._fakeSelectionContainer=null}markToSync(t,e){if("text"===t)this.domConverter.mapViewToDom(e.parent)&&this.markedTexts.add(e);else{if(!this.domConverter.mapViewToDom(e))return;if("attributes"===t)this.markedAttributes.add(e);else{if("children"!==t)throw new Qn.b("view-renderer-unknown-type: Unknown type passed to Renderer.markToSync.",this);this.markedChildren.add(e)}}}render(){let t;for(const t of this.markedChildren)this._updateChildrenMappings(t);this._inlineFiller&&!this._isSelectionInInlineFiller()&&this._removeInlineFiller(),this._inlineFiller?t=this._getInlineFillerPosition():this._needsInlineFillerAtSelection()&&(t=this.selection.getFirstPosition(),this.markedChildren.add(t.parent));for(const t of this.markedAttributes)this._updateAttrs(t);for(const e of this.markedChildren)this._updateChildren(e,{inlineFillerPosition:t});for(const e of this.markedTexts)!this.markedChildren.has(e.parent)&&this.domConverter.mapViewToDom(e.parent)&&this._updateText(e,{inlineFillerPosition:t});if(t){const e=this.domConverter.viewPositionToDom(t),n=e.parent.ownerDocument;Uo(e.parent)?this._inlineFiller=e.parent:this._inlineFiller=tr(n,e.parent,e.offset)}else this._inlineFiller=null;this._updateSelection(),this._updateFocus(),this.markedTexts.clear(),this.markedAttributes.clear(),this.markedChildren.clear()}_updateChildrenMappings(t){const e=this.domConverter.mapViewToDom(t);if(!e)return;const n=this.domConverter.mapViewToDom(t).childNodes,i=Array.from(this.domConverter.viewChildrenToDom(t,e.ownerDocument,{withChildren:!1})),o=this._diffNodeLists(n,i),r=this._findReplaceActions(o,n,i);if(-1!==r.indexOf("replace")){const e={equal:0,insert:0,delete:0};for(const o of r)if("replace"===o){const o=e.equal+e.insert,r=e.equal+e.delete,s=t.getChild(o);s&&!s.is("uiElement")&&this._updateElementMappings(s,n[r]),Jo(i[o]),e.equal++}else e[o]++}}_updateElementMappings(t,e){this.domConverter.unbindDomElement(e),this.domConverter.bindElements(e,t),this.markedChildren.add(t),this.markedAttributes.add(t)}_getInlineFillerPosition(){const t=this.selection.getFirstPosition();return t.parent.is("text")?Xi._createBefore(this.selection.getFirstPosition().parent):t}_isSelectionInInlineFiller(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;const t=this.selection.getFirstPosition(),e=this.domConverter.viewPositionToDom(t);return!!(e&&jo(e.parent)&&Uo(e.parent))}_removeInlineFiller(){const t=this._inlineFiller;if(!Uo(t))throw new Qn.b("view-renderer-filler-was-lost: The inline filler node was lost.",this);Ho(t)?t.parentNode.removeChild(t):t.data=t.data.substr(Bo),this._inlineFiller=null}_needsInlineFillerAtSelection(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;const t=this.selection.getFirstPosition(),e=t.parent,n=t.offset;if(!this.domConverter.mapViewToDom(e.root))return!1;if(!e.is("element"))return!1;if(!function(t){if("false"==t.getAttribute("contenteditable"))return!1;const e=t.findAncestor(t=>t.hasAttribute("contenteditable"));return!e||"true"==e.getAttribute("contenteditable")}(e))return!1;if(n===e.getFillerOffset())return!1;const i=t.nodeBefore,o=t.nodeAfter;return!(i instanceof gi||o instanceof gi)}_updateText(t,e){const n=this.domConverter.findCorrespondingDomText(t),i=this.domConverter.viewToDom(t,n.ownerDocument),o=n.data;let r=i.data;const s=e.inlineFillerPosition;if(s&&s.parent==t.parent&&s.offset==t.index&&(r=Fo+r),o!=r){const t=Yo(o,r);for(const e of t)"insert"===e.type?n.insertData(e.index,e.values.join("")):n.deleteData(e.index,e.howMany)}}_updateAttrs(t){const e=this.domConverter.mapViewToDom(t);if(!e)return;const n=Array.from(e.attributes).map(t=>t.name),i=t.getAttributeKeys();for(const n of i)e.setAttribute(n,t.getAttribute(n));for(const i of n)t.hasAttribute(i)||e.removeAttribute(i)}_updateChildren(t,e){const n=this.domConverter.mapViewToDom(t);if(!n)return;const i=e.inlineFillerPosition,o=this.domConverter.mapViewToDom(t).childNodes,r=Array.from(this.domConverter.viewChildrenToDom(t,n.ownerDocument,{bind:!0,inlineFillerPosition:i}));i&&i.parent===t&&tr(n.ownerDocument,r,i.offset);const s=this._diffNodeLists(o,r);let a=0;const c=new Set;for(const t of s)"insert"===t?(Ko(n,a,r[a]),a++):"delete"===t?(c.add(o[a]),Jo(o[a])):(this._markDescendantTextToSync(this.domConverter.domToView(r[a])),a++);for(const t of c)t.parentNode||this.domConverter.unbindDomElement(t)}_diffNodeLists(t,e){return Qo(t=function(t,e){const n=Array.from(t);if(0==n.length||!e)return n;n[n.length-1]==e&&n.pop();return n}(t,this._fakeSelectionContainer),e,nr.bind(null,this.domConverter))}_findReplaceActions(t,e,n){if(-1===t.indexOf("insert")||-1===t.indexOf("delete"))return t;let i=[],o=[],r=[];const s={equal:0,insert:0,delete:0};for(const a of t)"insert"===a?r.push(n[s.equal+s.insert]):"delete"===a?o.push(e[s.equal+s.delete]):((i=i.concat(Qo(o,r,er).map(t=>"equal"===t?"replace":t))).push("equal"),o=[],r=[]),s[a]++;return i.concat(Qo(o,r,er).map(t=>"equal"===t?"replace":t))}_markDescendantTextToSync(t){if(t)if(t.is("text"))this.markedTexts.add(t);else if(t.is("element"))for(const e of t.getChildren())this._markDescendantTextToSync(e)}_updateSelection(){if(0===this.selection.rangeCount)return this._removeDomSelection(),void this._removeFakeSelection();const t=this.domConverter.mapViewToDom(this.selection.editableElement);this.isFocused&&t&&(this.selection.isFake?this._updateFakeSelection(t):(this._removeFakeSelection(),this._updateDomSelection(t)))}_updateFakeSelection(t){const e=t.ownerDocument;this._fakeSelectionContainer||(this._fakeSelectionContainer=function(t){const e=t.createElement("div");return Object.assign(e.style,{position:"fixed",top:0,left:"-9999px",width:"42px"}),e.textContent=" ",e}(e));const n=this._fakeSelectionContainer;if(this.domConverter.bindFakeSelection(n,this.selection),!this._fakeSelectionNeedsUpdate(t))return;n.parentElement&&n.parentElement==t||t.appendChild(n),n.textContent=this.selection.fakeSelectionLabel||" ";const i=e.getSelection(),o=e.createRange();i.removeAllRanges(),o.selectNodeContents(n),i.addRange(o)}_updateDomSelection(t){const e=t.ownerDocument.defaultView.getSelection();if(!this._domSelectionNeedsUpdate(e))return;const n=this.domConverter.viewPositionToDom(this.selection.anchor),i=this.domConverter.viewPositionToDom(this.selection.focus);t.focus(),e.collapse(n.parent,n.offset),e.extend(i.parent,i.offset),mo.isGecko&&function(t,e){const n=t.parent;if(n.nodeType!=Node.ELEMENT_NODE||t.offset!=n.childNodes.length-1)return;const i=n.childNodes[t.offset];i&&"BR"==i.tagName&&e.addRange(e.getRangeAt(0))}(i,e)}_domSelectionNeedsUpdate(t){if(!this.domConverter.isDomSelectionCorrect(t))return!0;const e=t&&this.domConverter.domSelectionToView(t);return(!e||!this.selection.isEqual(e))&&!(!this.selection.isCollapsed&&this.selection.isSimilar(e))}_fakeSelectionNeedsUpdate(t){const e=this._fakeSelectionContainer,n=t.ownerDocument.getSelection();return!e||e.parentElement!==t||(n.anchorNode!==e&&!e.contains(n.anchorNode)||e.textContent!==this.selection.fakeSelectionLabel)}_removeDomSelection(){for(const t of this.domDocuments){if(t.getSelection().rangeCount){const e=t.activeElement,n=this.domConverter.mapDomToView(e);e&&n&&t.getSelection().removeAllRanges()}}}_removeFakeSelection(){const t=this._fakeSelectionContainer;t&&t.remove()}_updateFocus(){if(this.isFocused){const t=this.selection.editableElement;t&&this.domConverter.focus(t)}}}function tr(t,e,n){const i=e instanceof Array?e:e.childNodes,o=i[n];if(jo(o))return 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io(e))}fakeSelectionToView(t){return this._fakeSelectionMapping.get(t)}bindElements(t,e){this._domToViewMapping.set(t,e),this._viewToDomMapping.set(e,t)}unbindDomElement(t){const e=this._domToViewMapping.get(t);if(e){this._domToViewMapping.delete(t),this._viewToDomMapping.delete(e);for(const e of Array.from(t.childNodes))this.unbindDomElement(e)}}bindDocumentFragments(t,e){this._domToViewMapping.set(t,e),this._viewToDomMapping.set(e,t)}viewToDom(t,e,n={}){if(t.is("text")){const n=this._processDataFromViewText(t);return e.createTextNode(n)}{if(this.mapViewToDom(t))return this.mapViewToDom(t);let i;if(t.is("documentFragment"))i=e.createDocumentFragment(),n.bind&&this.bindDocumentFragments(i,t);else{if(t.is("uiElement"))return i=t.render(e),n.bind&&this.bindElements(i,t),i;i=t.hasAttribute("xmlns")?e.createElementNS(t.getAttribute("xmlns"),t.name):e.createElement(t.name),n.bind&&this.bindElements(i,t);for(const e of t.getAttributeKeys())i.setAttribute(e,t.getAttribute(e))}if(n.withChildren||void 0===n.withChildren)for(const o of this.viewChildrenToDom(t,e,n))i.appendChild(o);return i}}*viewChildrenToDom(t,e,n={}){const i=t.getFillerOffset&&t.getFillerOffset();let o=0;for(const r of t.getChildren())i===o&&(yield this._blockFiller(e)),yield this.viewToDom(r,e,n),o++;i===o&&(yield this._blockFiller(e))}viewRangeToDom(t){const e=this.viewPositionToDom(t.start),n=this.viewPositionToDom(t.end),i=document.createRange();return i.setStart(e.parent,e.offset),i.setEnd(n.parent,n.offset),i}viewPositionToDom(t){const e=t.parent;if(e.is("text")){const n=this.findCorrespondingDomText(e);if(!n)return null;let i=t.offset;return Uo(n)&&(i+=Bo),{parent:n,offset:i}}{let n,i,o;if(0===t.offset){if(!(n=this.mapViewToDom(e)))return null;o=n.childNodes[0]}else{const e=t.nodeBefore;if(!(i=e.is("text")?this.findCorrespondingDomText(e):this.mapViewToDom(t.nodeBefore)))return null;n=i.parentNode,o=i.nextSibling}if(jo(o)&&Uo(o))return{parent:o,offset:Bo};return{parent:n,offset:i?or(i)+1:0}}}domToView(t,e={}){if(this.isBlockFiller(t,this.blockFillerMode))return null;const n=this.getParentUIElement(t,this._domToViewMapping);if(n)return n;if(jo(t)){if(Ho(t))return null;{const e=this._processDataFromDomText(t);return""===e?null:new gi(e)}}if(this.isComment(t))return null;{if(this.mapDomToView(t))return this.mapDomToView(t);let n;if(this.isDocumentFragment(t))n=new Co,e.bind&&this.bindDocumentFragments(t,n);else{const i=e.keepOriginalCase?t.tagName:t.tagName.toLowerCase();n=new _i(i),e.bind&&this.bindElements(t,n);const o=t.attributes;for(let t=o.length-1;t>=0;t--)n._setAttribute(o[t].name,o[t].value)}if(e.withChildren||void 0===e.withChildren)for(const i of this.domChildrenToView(t,e))n._appendChild(i);return n}}*domChildrenToView(t,e={}){for(let n=0;n{const{scrollLeft:e,scrollTop:n}=t;i.push([e,n])}),e.focus(),lr(e,t=>{const[e,n]=i.shift();t.scrollLeft=e,t.scrollTop=n}),ir.window.scrollTo(t,n)}}isElement(t){return t&&t.nodeType==Node.ELEMENT_NODE}isDocumentFragment(t){return t&&t.nodeType==Node.DOCUMENT_FRAGMENT_NODE}isComment(t){return t&&t.nodeType==Node.COMMENT_NODE}isBlockFiller(t){return"br"==this.blockFillerMode?t.isEqualNode(sr):!("BR"!==t.tagName||!dr(t,this.blockElements)||1!==t.parentNode.childNodes.length)||function(t,e){return jo(t)&&" "==t.data&&dr(t,e)&&1===t.parentNode.childNodes.length}(t,this.blockElements)}isDomSelectionBackward(t){if(t.isCollapsed)return!1;const e=document.createRange();e.setStart(t.anchorNode,t.anchorOffset),e.setEnd(t.focusNode,t.focusOffset);const n=e.collapsed;return e.detach(),n}getParentUIElement(t){const e=rr(t);for(e.pop();e.length;){const t=e.pop(),n=this._domToViewMapping.get(t);if(n&&n.is("uiElement"))return n}return null}isDomSelectionCorrect(t){return this._isDomSelectionPositionCorrect(t.anchorNode,t.anchorOffset)&&this._isDomSelectionPositionCorrect(t.focusNode,t.focusOffset)}_isDomSelectionPositionCorrect(t,e){if(jo(t)&&Uo(t)&&ethis.preElements.includes(t.name)))return e;if(" "==e.charAt(0)){const n=this._getTouchingViewTextNode(t,!1);!(n&&this._nodeEndsWithSpace(n))&&n||(e=" "+e.substr(1))}if(" "==e.charAt(e.length-1)){const n=this._getTouchingViewTextNode(t,!0);" "!=e.charAt(e.length-2)&&n&&" "!=n.data.charAt(0)||(e=e.substr(0,e.length-1)+" ")}return e.replace(/ {2}/g,"  ")}_nodeEndsWithSpace(t){if(t.getAncestors().some(t=>this.preElements.includes(t.name)))return!1;const e=this._processDataFromViewText(t);return" "==e.charAt(e.length-1)}_processDataFromDomText(t){let e=t.data;if(cr(t,this.preElements))return qo(t);e=e.replace(/[ \n\t\r]{1,}/g," ");const n=this._getTouchingInlineDomNode(t,!1),i=this._getTouchingInlineDomNode(t,!0),o=this._checkShouldLeftTrimDomText(n),r=this._checkShouldRightTrimDomText(t,i);return o&&(e=e.replace(/^ /,"")),r&&(e=e.replace(/ $/,"")),e=(e=qo(new Text(e))).replace(/ \u00A0/g," "),(/( |\u00A0)\u00A0$/.test(e)||!i||i.data&&" "==i.data.charAt(0))&&(e=e.replace(/\u00A0$/," ")),o&&(e=e.replace(/^\u00A0/," ")),e}_checkShouldLeftTrimDomText(t){return!t||(!!Yn(t)||/[^\S\u00A0]/.test(t.data.charAt(t.data.length-1)))}_checkShouldRightTrimDomText(t,e){return!e&&!Uo(t)}_getTouchingViewTextNode(t,e){const n=new Zi({startPosition:e?Xi._createAfter(t):Xi._createBefore(t),direction:e?"forward":"backward"});for(const t of n){if(t.item.is("containerElement"))return null;if(t.item.is("br"))return null;if(t.item.is("textProxy"))return t.item}return null}_getTouchingInlineDomNode(t,e){if(!t.parentNode)return null;const n=e?"nextNode":"previousNode",i=t.ownerDocument,o=rr(t)[0],r=i.createTreeWalker(o,NodeFilter.SHOW_TEXT|NodeFilter.SHOW_ELEMENT,{acceptNode:t=>jo(t)?NodeFilter.FILTER_ACCEPT:"BR"==t.tagName?NodeFilter.FILTER_ACCEPT:NodeFilter.FILTER_SKIP});r.currentNode=t;const s=r[n]();if(null!==s){const e=function(t,e){const n=rr(t),i=rr(e);let o=0;for(;n[o]==i[o]&&n[o];)o++;return 0===o?null:n[o-1]}(t,s);if(e&&!cr(t,this.blockElements,e)&&!cr(s,this.blockElements,e))return s}return null}}function cr(t,e,n){let i=rr(t);return n&&(i=i.slice(i.indexOf(n)+1)),i.some(t=>t.tagName&&e.includes(t.tagName.toLowerCase()))}function lr(t,e){for(;t&&t!=ir.document;)e(t),t=t.parentNode}function dr(t,e){const n=t.parentNode;return n&&n.tagName&&e.includes(n.tagName.toLowerCase())}function hr(t){const e=Object.prototype.toString.apply(t);return"[object Window]"==e||"[object global]"==e}var ur=ji({},ni,{listenTo(t,...e){if(Zo(t)||hr(t)){const n=this._getProxyEmitter(t)||new fr(t);n.attach(...e),t=n}ni.listenTo.call(this,t,...e)},stopListening(t,e,n){if(Zo(t)||hr(t)){const e=this._getProxyEmitter(t);if(!e)return;t=e}ni.stopListening.call(this,t,e,n),t instanceof fr&&t.detach(e)},_getProxyEmitter(t){return e=this,n=gr(t),e[ti]&&e[ti][n]?e[ti][n].emitter:null;var e,n}});class fr{constructor(t){ii(this,gr(t)),this._domNode=t}}function gr(t){return t["data-ck-expando"]||(t["data-ck-expando"]=Zn())}ji(fr.prototype,ni,{attach(t,e,n={}){if(this._domListeners&&this._domListeners[t])return;const i=this._createDomListener(t,!!n.useCapture);this._domNode.addEventListener(t,i,!!n.useCapture),this._domListeners||(this._domListeners={}),this._domListeners[t]=i},detach(t){let e;!this._domListeners[t]||(e=this._events[t])&&e.callbacks.length||this._domListeners[t].removeListener()},_createDomListener(t,e){const n=e=>{this.fire(t,e)};return n.removeListener=()=>{this._domNode.removeEventListener(t,n,e),delete this._domListeners[t]},n}});class mr{constructor(t){this.view=t,this.document=t.document,this.isEnabled=!1}enable(){this.isEnabled=!0}disable(){this.isEnabled=!1}destroy(){this.disable(),this.stopListening()}}li(mr,ur);var pr="__lodash_hash_undefined__";var br=function(t){return this.__data__.set(t,pr),this};var wr=function(t){return this.__data__.has(t)};function kr(t){var e=-1,n=null==t?0:t.length;for(this.__data__=new St;++ea))return!1;var l=r.get(t);if(l&&r.get(e))return l==e;var d=-1,h=!0,u=n&Ar?new _r:void 0;for(r.set(t,e),r.set(e,t);++d{this.listenTo(t,e,(t,e)=>{this.isEnabled&&this.onDomEvent(e)},{useCapture:this.useCapture})})}fire(t,e,n){this.isEnabled&&this.document.fire(t,new ns(this.view,e,n))}}class os extends is{constructor(t){super(t),this.domEventType=["keydown","keyup"]}onDomEvent(t){this.fire(t.type,t,{keyCode:t.keyCode,altKey:t.altKey,ctrlKey:t.ctrlKey||t.metaKey,shiftKey:t.shiftKey,get keystroke(){return ko(this)}})}}var rs=function(){return i.a.Date.now()},ss="[object Symbol]";var as=function(t){return"symbol"==typeof t||w(t)&&m(t)==ss},cs=NaN,ls=/^\s+|\s+$/g,ds=/^[-+]0x[0-9a-f]+$/i,hs=/^0b[01]+$/i,us=/^0o[0-7]+$/i,fs=parseInt;var gs=function(t){if("number"==typeof t)return t;if(as(t))return cs;if(B(t)){var e="function"==typeof t.valueOf?t.valueOf():t;t=B(e)?e+"":e}if("string"!=typeof t)return 0===t?t:+t;t=t.replace(ls,"");var n=hs.test(t);return n||us.test(t)?fs(t.slice(2),n?2:8):ds.test(t)?cs:+t},ms="Expected a function",ps=Math.max,bs=Math.min;var ws=function(t,e,n){var i,o,r,s,a,c,l=0,d=!1,h=!1,u=!0;if("function"!=typeof t)throw new TypeError(ms);function f(e){var n=i,r=o;return i=o=void 0,l=e,s=t.apply(r,n)}function g(t){var n=t-c;return void 0===c||n>=e||n<0||h&&t-l>=r}function m(){var t=rs();if(g(t))return p(t);a=setTimeout(m,function(t){var n=e-(t-c);return h?bs(n,r-(t-l)):n}(t))}function p(t){return a=void 0,u&&i?f(t):(i=o=void 0,s)}function b(){var t=rs(),n=g(t);if(i=arguments,o=this,c=t,n){if(void 0===a)return function(t){return l=t,a=setTimeout(m,e),d?f(t):s}(c);if(h)return clearTimeout(a),a=setTimeout(m,e),f(c)}return void 0===a&&(a=setTimeout(m,e)),s}return e=gs(e)||0,B(n)&&(d=!!n.leading,r=(h="maxWait"in n)?ps(gs(n.maxWait)||0,e):r,u="trailing"in n?!!n.trailing:u),b.cancel=function(){void 0!==a&&clearTimeout(a),l=0,i=c=o=a=void 0},b.flush=function(){return void 0===a?s:p(rs())},b};class ks extends mr{constructor(t){super(t),this._fireSelectionChangeDoneDebounced=ws(t=>this.document.fire("selectionChangeDone",t),200)}observe(){const t=this.document;t.on("keydown",(e,n)=>{t.selection.isFake&&function(t){return t==wo.arrowright||t==wo.arrowleft||t==wo.arrowup||t==wo.arrowdown}(n.keyCode)&&this.isEnabled&&(n.preventDefault(),this._handleSelectionMove(n.keyCode))},{priority:"lowest"})}destroy(){super.destroy(),this._fireSelectionChangeDoneDebounced.cancel()}_handleSelectionMove(t){const e=this.document.selection,n=new io(e.getRanges(),{backward:e.isBackward,fake:!1});t!=wo.arrowleft&&t!=wo.arrowup||n.setTo(n.getFirstPosition()),t!=wo.arrowright&&t!=wo.arrowdown||n.setTo(n.getLastPosition());const i={oldSelection:e,newSelection:n,domSelection:null};this.document.fire("selectionChange",i),this._fireSelectionChangeDoneDebounced(i)}}class _s extends mr{constructor(t){super(t),this.mutationObserver=t.getObserver(es),this.selection=this.document.selection,this.domConverter=t.domConverter,this._documents=new WeakSet,this._fireSelectionChangeDoneDebounced=ws(t=>this.document.fire("selectionChangeDone",t),200),this._clearInfiniteLoopInterval=setInterval(()=>this._clearInfiniteLoop(),1e3),this._loopbackCounter=0}observe(t){const e=t.ownerDocument;this._documents.has(e)||(this.listenTo(e,"selectionchange",()=>{this._handleSelectionChange(e)}),this._documents.add(e))}destroy(){super.destroy(),clearInterval(this._clearInfiniteLoopInterval),this._fireSelectionChangeDoneDebounced.cancel()}_handleSelectionChange(t){if(!this.isEnabled||!this.document.isFocused&&!this.document.isReadOnly)return;this.mutationObserver.flush();const e=t.defaultView.getSelection(),n=this.domConverter.domSelectionToView(e);if(!(this.selection.isEqual(n)&&this.domConverter.isDomSelectionCorrect(e)||++this._loopbackCounter>60))if(this.selection.isSimilar(n))this.view.forceRender();else{const t={oldSelection:this.selection,newSelection:n,domSelection:e};this.document.fire("selectionChange",t),this._fireSelectionChangeDoneDebounced(t)}}_clearInfiniteLoop(){this._loopbackCounter=0}}class vs extends is{constructor(t){super(t),this.domEventType=["focus","blur"],this.useCapture=!0;const e=this.document;e.on("focus",()=>{e.isFocused=!0,this._renderTimeoutId=setTimeout(()=>t.forceRender(),50)}),e.on("blur",(n,i)=>{const o=e.selection.editableElement;null!==o&&o!==i.target||(e.isFocused=!1,t.forceRender())})}onDomEvent(t){this.fire(t.type,t)}destroy(){this._renderTimeoutId&&clearTimeout(this._renderTimeoutId),super.destroy()}}class ys extends is{constructor(t){super(t),this.domEventType=["compositionstart","compositionupdate","compositionend"];const e=this.document;e.on("compositionstart",()=>{e.isComposing=!0}),e.on("compositionend",()=>{e.isComposing=!1})}onDomEvent(t){this.fire(t.type,t)}}class xs extends is{constructor(t){super(t),this.domEventType=["beforeinput"]}onDomEvent(t){this.fire(t.type,t)}}function As(t){return"[object Range]"==Object.prototype.toString.apply(t)}function Ts(t){const e=t.ownerDocument.defaultView.getComputedStyle(t);return{top:parseInt(e.borderTopWidth,10),right:parseInt(e.borderRightWidth,10),bottom:parseInt(e.borderBottomWidth,10),left:parseInt(e.borderLeftWidth,10)}}const Cs=["top","right","bottom","left","width","height"];class Ps{constructor(t){const e=As(t);if(Object.defineProperty(this,"_source",{value:t._source||t,writable:!0,enumerable:!1}),Yn(t)||e)Ss(this,e?Ps.getDomRangeRects(t)[0]:t.getBoundingClientRect());else if(hr(t)){const{innerWidth:e,innerHeight:n}=t;Ss(this,{top:0,right:e,bottom:n,left:0,width:e,height:n})}else Ss(this,t)}clone(){return new Ps(this)}moveTo(t,e){return this.top=e,this.right=t+this.width,this.bottom=e+this.height,this.left=t,this}moveBy(t,e){return this.top+=e,this.right+=t,this.left+=t,this.bottom+=e,this}getIntersection(t){const e={top:Math.max(this.top,t.top),right:Math.min(this.right,t.right),bottom:Math.min(this.bottom,t.bottom),left:Math.max(this.left,t.left)};return e.width=e.right-e.left,e.height=e.bottom-e.top,e.width<0||e.height<0?null:new Ps(e)}getIntersectionArea(t){const e=this.getIntersection(t);return e?e.getArea():0}getArea(){return this.width*this.height}getVisible(){const t=this._source;let e=this.clone();if(!Ms(t)){let n=t.parentNode||t.commonAncestorContainer;for(;n&&!Ms(n);){const t=new Ps(n),i=e.getIntersection(t);if(!i)return null;i.getArea()zs(t,i));const s=zs(t,i);if(Is(i,s,e),i.parent!=i){if(o=i.frameElement,i=i.parent,!o)return}else i=null}}function Is(t,e,n){const i=e.clone().moveBy(0,n),o=e.clone().moveBy(0,-n),r=new Ps(t).excludeScrollbarsAndBorders();if(![o,i].every(t=>r.contains(t))){let{scrollX:s,scrollY:a}=t;Rs(o,r)?a-=r.top-e.top+n:Os(i,r)&&(a+=e.bottom-r.bottom+n),Ds(e,r)?s-=r.left-e.left+n:Ls(e,r)&&(s+=e.right-r.right+n),t.scrollTo(s,a)}}function Ns(t,e){const n=js(t);let i,o;for(;t!=n.document.body;)o=e(),(i=new Ps(t).excludeScrollbarsAndBorders()).contains(o)||(Rs(o,i)?t.scrollTop-=i.top-o.top:Os(o,i)&&(t.scrollTop+=o.bottom-i.bottom),Ds(o,i)?t.scrollLeft-=i.left-o.left:Ls(o,i)&&(t.scrollLeft+=o.right-i.right)),t=t.parentNode}function Os(t,e){return t.bottom>e.bottom}function Rs(t,e){return t.tope.right}function js(t){return As(t)?t.startContainer.ownerDocument.defaultView:t.ownerDocument.defaultView}function Vs(t){if(As(t)){let e=t.commonAncestorContainer;return jo(e)&&(e=e.parentNode),e}return t.parentNode}function zs(t,e){const n=js(t),i=new Ps(t);if(n===e)return i;{let t=n;for(;t!=e;){const e=t.frameElement,n=new Ps(e).excludeScrollbarsAndBorders();i.moveBy(n.left,n.top),t=t.parent}}return i}Object.assign({},{scrollViewportToShowTarget:Es,scrollAncestorsToShowTarget:function(t){Ns(Vs(t),()=>new Ps(t))}});class Bs{constructor(){this.document=new so,this.domConverter=new ar,this.domRoots=new Map,this.set("isRenderingInProgress",!1),this._renderer=new Xo(this.domConverter,this.document.selection),this._renderer.bind("isFocused").to(this.document),this._initialDomRootAttributes=new WeakMap,this._observers=new Map,this._ongoingChange=!1,this._postFixersInProgress=!1,this._renderingDisabled=!1,this._hasChangedSinceTheLastRendering=!1,this._writer=new Po(this.document),this.addObserver(es),this.addObserver(_s),this.addObserver(vs),this.addObserver(os),this.addObserver(ks),this.addObserver(ys),mo.isAndroid&&this.addObserver(xs),this.document.on("keydown",Wo),Ao(this),this.on("render",()=>{this._render(),this.document.fire("layoutChanged"),this._hasChangedSinceTheLastRendering=!1}),this.listenTo(this.document.selection,"change",()=>{this._hasChangedSinceTheLastRendering=!0})}attachDomRoot(t,e="main"){const n=this.document.getRoot(e);n._name=t.tagName.toLowerCase();const i={};for(const{name:e,value:o}of Array.from(t.attributes))i[e]=o,"class"===e?this._writer.addClass(o.split(" "),n):this._writer.setAttribute(e,o,n);this._initialDomRootAttributes.set(t,i);const o=()=>{this._writer.setAttribute("contenteditable",!n.isReadOnly,n),n.isReadOnly?this._writer.addClass("ck-read-only",n):this._writer.removeClass("ck-read-only",n)};o(),this.domRoots.set(e,t),this.domConverter.bindElements(t,n),this._renderer.markToSync("children",n),this._renderer.markToSync("attributes",n),this._renderer.domDocuments.add(t.ownerDocument),n.on("change:children",(t,e)=>this._renderer.markToSync("children",e)),n.on("change:attributes",(t,e)=>this._renderer.markToSync("attributes",e)),n.on("change:text",(t,e)=>this._renderer.markToSync("text",e)),n.on("change:isReadOnly",()=>this.change(o)),n.on("change",()=>{this._hasChangedSinceTheLastRendering=!0});for(const n of this._observers.values())n.observe(t,e)}detachDomRoot(t){const e=this.domRoots.get(t);Array.from(e.attributes).forEach(({name:t})=>e.removeAttribute(t));const n=this._initialDomRootAttributes.get(e);for(const t in n)e.setAttribute(t,n[t]);this.domRoots.delete(t),this.domConverter.unbindDomElement(e)}getDomRoot(t="main"){return this.domRoots.get(t)}addObserver(t){let e=this._observers.get(t);if(e)return e;e=new t(this),this._observers.set(t,e);for(const[t,n]of this.domRoots)e.observe(n,t);return e.enable(),e}getObserver(t){return this._observers.get(t)}disableObservers(){for(const t of this._observers.values())t.disable()}enableObservers(){for(const t of this._observers.values())t.enable()}scrollToTheSelection(){const t=this.document.selection.getFirstRange();t&&Es({target:this.domConverter.viewRangeToDom(t),viewportOffset:20})}focus(){if(!this.document.isFocused){const t=this.document.selection.editableElement;t&&(this.domConverter.focus(t),this.forceRender())}}change(t){if(this.isRenderingInProgress||this._postFixersInProgress)throw new Qn.b("cannot-change-view-tree: Attempting to make changes to the view when it is in an incorrect state: rendering or post-fixers are in progress. This may cause some unexpected behavior and inconsistency between the DOM and the view.",this);try{if(this._ongoingChange)return t(this._writer);this._ongoingChange=!0;const e=t(this._writer);return this._ongoingChange=!1,!this._renderingDisabled&&this._hasChangedSinceTheLastRendering&&(this._postFixersInProgress=!0,this.document._callPostFixers(this._writer),this._postFixersInProgress=!1,this.fire("render")),e}catch(t){Qn.b.rethrowUnexpectedError(t,this)}}forceRender(){this._hasChangedSinceTheLastRendering=!0,this.change(()=>{})}destroy(){for(const t of this._observers.values())t.destroy();this.document.destroy(),this.stopListening()}createPositionAt(t,e){return Xi._createAt(t,e)}createPositionAfter(t){return Xi._createAfter(t)}createPositionBefore(t){return Xi._createBefore(t)}createRange(t,e){return new to(t,e)}createRangeOn(t){return to._createOn(t)}createRangeIn(t){return to._createIn(t)}createSelection(t,e,n){return new io(t,e,n)}_disableRendering(t){this._renderingDisabled=t,0==t&&this.change(()=>{})}_render(){this.isRenderingInProgress=!0,this.disableObservers(),this._renderer.render(),this.enableObservers(),this.isRenderingInProgress=!1}}function Fs(t){return T(t)?pi(t):new Map(t)}li(Bs,Ui);class Us{constructor(t){this.parent=null,this._attrs=Fs(t)}get index(){let t;if(!this.parent)return null;if(null===(t=this.parent.getChildIndex(this)))throw new Qn.b("model-node-not-found-in-parent: The node's parent does not contain this node.",this);return t}get startOffset(){let t;if(!this.parent)return null;if(null===(t=this.parent.getChildStartOffset(this)))throw new Qn.b("model-node-not-found-in-parent: The node's parent does not contain this node.",this);return t}get offsetSize(){return 1}get endOffset(){return this.parent?this.startOffset+this.offsetSize:null}get nextSibling(){const t=this.index;return null!==t&&this.parent.getChild(t+1)||null}get previousSibling(){const t=this.index;return null!==t&&this.parent.getChild(t-1)||null}get root(){let t=this;for(;t.parent;)t=t.parent;return t}get document(){return this.root==this?null:this.root.document||null}getPath(){const t=[];let e=this;for(;e.parent;)t.unshift(e.startOffset),e=e.parent;return t}getAncestors(t={includeSelf:!1,parentFirst:!1}){const e=[];let n=t.includeSelf?this:this.parent;for(;n;)e[t.parentFirst?"push":"unshift"](n),n=n.parent;return e}getCommonAncestor(t,e={}){const n=this.getAncestors(e),i=t.getAncestors(e);let o=0;for(;n[o]==i[o]&&n[o];)o++;return 0===o?null:n[o-1]}isBefore(t){if(this==t)return!1;if(this.root!==t.root)return!1;const e=this.getPath(),n=t.getPath(),i=di(e,n);switch(i){case"prefix":return!0;case"extension":return!1;default:return e[i](t[e[0]]=e[1],t),{})),t}is(t){return"node"==t||"model:node"==t}_clone(){return new Us(this._attrs)}_remove(){this.parent._removeChildren(this.index)}_setAttribute(t,e){this._attrs.set(t,e)}_setAttributesTo(t){this._attrs=Fs(t)}_removeAttribute(t){return this._attrs.delete(t)}_clearAttributes(){this._attrs.clear()}}class Hs extends Us{constructor(t,e){super(e),this._data=t||""}get offsetSize(){return this.data.length}get data(){return this._data}is(t){return"text"==t||"model:text"==t||super.is(t)}toJSON(){const t=super.toJSON();return t.data=this.data,t}_clone(){return new Hs(this.data,this.getAttributes())}static fromJSON(t){return new Hs(t.data,t.attributes)}}class qs{constructor(t,e,n){if(this.textNode=t,e<0||e>t.offsetSize)throw new Qn.b("model-textproxy-wrong-offsetintext: Given offsetInText value is incorrect.",this);if(n<0||e+n>t.offsetSize)throw new Qn.b("model-textproxy-wrong-length: Given length value is incorrect.",this);this.data=t.data.substring(e,e+n),this.offsetInText=e}get startOffset(){return null!==this.textNode.startOffset?this.textNode.startOffset+this.offsetInText:null}get offsetSize(){return this.data.length}get endOffset(){return null!==this.startOffset?this.startOffset+this.offsetSize:null}get isPartial(){return this.offsetSize!==this.textNode.offsetSize}get parent(){return this.textNode.parent}get root(){return this.textNode.root}get document(){return this.textNode.document}is(t){return"textProxy"==t||"model:textProxy"==t}getPath(){const t=this.textNode.getPath();return t.length>0&&(t[t.length-1]+=this.offsetInText),t}getAncestors(t={includeSelf:!1,parentFirst:!1}){const e=[];let n=t.includeSelf?this:this.parent;for(;n;)e[t.parentFirst?"push":"unshift"](n),n=n.parent;return e}hasAttribute(t){return this.textNode.hasAttribute(t)}getAttribute(t){return this.textNode.getAttribute(t)}getAttributes(){return this.textNode.getAttributes()}getAttributeKeys(){return this.textNode.getAttributeKeys()}}class Ws{constructor(t){this._nodes=[],t&&this._insertNodes(0,t)}[Symbol.iterator](){return this._nodes[Symbol.iterator]()}get length(){return this._nodes.length}get maxOffset(){return this._nodes.reduce((t,e)=>t+e.offsetSize,0)}getNode(t){return this._nodes[t]||null}getNodeIndex(t){const e=this._nodes.indexOf(t);return-1==e?null:e}getNodeStartOffset(t){const e=this.getNodeIndex(t);return null===e?null:this._nodes.slice(0,e).reduce((t,e)=>t+e.offsetSize,0)}indexToOffset(t){if(t==this._nodes.length)return this.maxOffset;const e=this._nodes[t];if(!e)throw new Qn.b("model-nodelist-index-out-of-bounds: Given index cannot be found in the node list.",this);return this.getNodeStartOffset(e)}offsetToIndex(t){let e=0;for(const n of this._nodes){if(t>=e&&tt.toJSON())}}class Ys extends Us{constructor(t,e,n){super(e),this.name=t,this._children=new Ws,n&&this._insertChild(0,n)}get childCount(){return this._children.length}get maxOffset(){return this._children.maxOffset}get isEmpty(){return 0===this.childCount}is(t,e=null){const n=t.replace(/^model:/,"");return e?"element"==n&&e==this.name:"element"==n||n==this.name||super.is(t)}getChild(t){return this._children.getNode(t)}getChildren(){return this._children[Symbol.iterator]()}getChildIndex(t){return this._children.getNodeIndex(t)}getChildStartOffset(t){return this._children.getNodeStartOffset(t)}offsetToIndex(t){return this._children.offsetToIndex(t)}getNodeByPath(t){let e=this;for(const n of t)e=e.getChild(e.offsetToIndex(n));return e}toJSON(){const t=super.toJSON();if(t.name=this.name,this._children.length>0){t.children=[];for(const e of this._children)t.children.push(e.toJSON())}return t}_clone(t=!1){const e=t?Array.from(this._children).map(t=>t._clone(!0)):null;return new Ys(this.name,this.getAttributes(),e)}_appendChild(t){this._insertChild(this.childCount,t)}_insertChild(t,e){const n=function(t){if("string"==typeof t)return[new Hs(t)];bi(t)||(t=[t]);return Array.from(t).map(t=>"string"==typeof t?new Hs(t):t instanceof qs?new Hs(t.data,t.getAttributes()):t)}(e);for(const t of n)null!==t.parent&&t._remove(),t.parent=this;this._children._insertNodes(t,n)}_removeChildren(t,e=1){const n=this._children._removeNodes(t,e);for(const t of n)t.parent=null;return n}static fromJSON(t){let e=null;if(t.children){e=[];for(const n of t.children)n.name?e.push(Ys.fromJSON(n)):e.push(Hs.fromJSON(n))}return new Ys(t.name,t.attributes,e)}}class $s{constructor(t={}){if(!t.boundaries&&!t.startPosition)throw new Qn.b("model-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.",null);const e=t.direction||"forward";if("forward"!=e&&"backward"!=e)throw new Qn.b("model-tree-walker-unknown-direction: Only `backward` and `forward` direction allowed.",t,{direction:e});this.direction=e,this.boundaries=t.boundaries||null,t.startPosition?this.position=t.startPosition.clone():this.position=Ks._createAt(this.boundaries["backward"==this.direction?"end":"start"]),this.position.stickiness="toNone",this.singleCharacters=!!t.singleCharacters,this.shallow=!!t.shallow,this.ignoreElementEnd=!!t.ignoreElementEnd,this._boundaryStartParent=this.boundaries?this.boundaries.start.parent:null,this._boundaryEndParent=this.boundaries?this.boundaries.end.parent:null,this._visitedParent=this.position.parent}[Symbol.iterator](){return this}skip(t){let e,n,i,o;do{i=this.position,o=this._visitedParent,({done:e,value:n}=this.next())}while(!e&&t(n));e||(this.position=i,this._visitedParent=o)}next(){return"forward"==this.direction?this._next():this._previous()}_next(){const t=this.position,e=this.position.clone(),n=this._visitedParent;if(null===n.parent&&e.offset===n.maxOffset)return{done:!0};if(n===this._boundaryEndParent&&e.offset==this.boundaries.end.offset)return{done:!0};const i=e.textNode?e.textNode:e.nodeAfter;if(i instanceof Ys)return this.shallow?e.offset++:(e.path.push(0),this._visitedParent=i),this.position=e,Gs("elementStart",i,t,e,1);if(i instanceof Hs){let o;if(this.singleCharacters)o=1;else{let t=i.endOffset;this._boundaryEndParent==n&&this.boundaries.end.offsett&&(t=this.boundaries.start.offset),o=e.offset-t}const r=e.offset-i.startOffset,s=new qs(i,r-o,o);return e.offset-=o,this.position=e,Gs("text",s,t,e,o)}return e.path.pop(),this.position=e,this._visitedParent=n.parent,Gs("elementStart",n,t,e,1)}}function Gs(t,e,n,i,o){return{done:!1,value:{type:t,item:e,previousPosition:n,nextPosition:i,length:o}}}var Qs=function(t){var e=null==t?0:t.length;return e?t[e-1]:void 0};class Ks{constructor(t,e,n="toNone"){if(!t.is("element")&&!t.is("documentFragment"))throw new Qn.b("model-position-root-invalid: Position root invalid.",t);if(!(e instanceof Array)||0===e.length)throw new Qn.b("model-position-path-incorrect-format: Position path must be an array with at least one item.",t,{path:e});e=t.getPath().concat(e),t=t.root,this.root=t,this.path=e,this.stickiness=n}get offset(){return Qs(this.path)}set offset(t){this.path[this.path.length-1]=t}get parent(){let t=this.root;for(let e=0;en.path.length){if(e.offset!==i.maxOffset)return!1;e.path=e.path.slice(0,-1),i=i.parent,e.offset++}else{if(0!==n.offset)return!1;n.path=n.path.slice(0,-1)}}}is(t){return"position"==t||"model:position"==t}hasSameParentAs(t){if(this.root!==t.root)return!1;return"same"==di(this.getParentPath(),t.getParentPath())}getTransformedByOperation(t){let e;switch(t.type){case"insert":e=this._getTransformedByInsertOperation(t);break;case"move":case"remove":case"reinsert":e=this._getTransformedByMoveOperation(t);break;case"split":e=this._getTransformedBySplitOperation(t);break;case"merge":e=this._getTransformedByMergeOperation(t);break;default:e=Ks._createAt(this)}return e}_getTransformedByInsertOperation(t){return this._getTransformedByInsertion(t.position,t.howMany)}_getTransformedByMoveOperation(t){return this._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany)}_getTransformedBySplitOperation(t){const e=t.movedRange;return e.containsPosition(this)||e.start.isEqual(this)&&"toNext"==this.stickiness?this._getCombined(t.splitPosition,t.moveTargetPosition):t.graveyardPosition?this._getTransformedByMove(t.graveyardPosition,t.insertionPosition,1):this._getTransformedByInsertion(t.insertionPosition,1)}_getTransformedByMergeOperation(t){const e=t.movedRange;let n;return e.containsPosition(this)||e.start.isEqual(this)?(n=this._getCombined(t.sourcePosition,t.targetPosition),t.sourcePosition.isBefore(t.targetPosition)&&(n=n._getTransformedByDeletion(t.deletionPosition,1))):n=this.isEqual(t.deletionPosition)?Ks._createAt(t.deletionPosition):this._getTransformedByMove(t.deletionPosition,t.graveyardPosition,1),n}_getTransformedByDeletion(t,e){const n=Ks._createAt(this);if(this.root!=t.root)return n;if("same"==di(t.getParentPath(),this.getParentPath())){if(t.offsetthis.offset)return null;n.offset-=e}}else if("prefix"==di(t.getParentPath(),this.getParentPath())){const i=t.path.length-1;if(t.offset<=this.path[i]){if(t.offset+e>this.path[i])return null;n.path[i]-=e}}return n}_getTransformedByInsertion(t,e){const n=Ks._createAt(this);if(this.root!=t.root)return n;if("same"==di(t.getParentPath(),this.getParentPath()))(t.offsete+1;){const e=i.maxOffset-n.offset;0!==e&&t.push(new Js(n,n.getShiftedBy(e))),n.path=n.path.slice(0,-1),n.offset++,i=i.parent}for(;n.path.length<=this.end.path.length;){const e=this.end.path[n.path.length-1],i=e-n.offset;0!==i&&t.push(new Js(n,n.getShiftedBy(i))),n.offset=e,n.path.push(0)}return t}getWalker(t={}){return t.boundaries=this,new $s(t)}*getItems(t={}){t.boundaries=this,t.ignoreElementEnd=!0;const e=new $s(t);for(const t of e)yield t.item}*getPositions(t={}){t.boundaries=this;const e=new $s(t);yield e.position;for(const t of e)yield t.nextPosition}getTransformedByOperation(t){switch(t.type){case"insert":return this._getTransformedByInsertOperation(t);case"move":case"remove":case"reinsert":return this._getTransformedByMoveOperation(t);case"split":return[this._getTransformedBySplitOperation(t)];case"merge":return[this._getTransformedByMergeOperation(t)]}return[new Js(this.start,this.end)]}getTransformedByOperations(t){const e=[new Js(this.start,this.end)];for(const n of t)for(let t=0;t0?new this(n,i):new this(i,n)}static _createIn(t){return new this(Ks._createAt(t,0),Ks._createAt(t,t.maxOffset))}static _createOn(t){return this._createFromPositionAndShift(Ks._createBefore(t),t.offsetSize)}static _createFromRanges(t){if(0===t.length)throw new Qn.b("range-create-from-ranges-empty-array: At least one range has to be passed.",null);if(1==t.length)return t[0].clone();const e=t[0];t.sort((t,e)=>t.start.isAfter(e.start)?1:-1);const n=t.indexOf(e),i=new this(e.start,e.end);if(n>0)for(let e=n-1;t[e].end.isEqual(i.start);e++)i.start=Ks._createAt(t[e].start);for(let e=n+1;e{if(e.viewPosition)return;const n=this._modelToViewMapping.get(e.modelPosition.parent);e.viewPosition=this._findPositionIn(n,e.modelPosition.offset)},{priority:"low"}),this.on("viewToModelPosition",(t,e)=>{if(e.modelPosition)return;const n=this.findMappedViewAncestor(e.viewPosition),i=this._viewToModelMapping.get(n),o=this._toModelOffset(e.viewPosition.parent,e.viewPosition.offset,n);e.modelPosition=Ks._createAt(i,o)},{priority:"low"})}bindElements(t,e){this._modelToViewMapping.set(t,e),this._viewToModelMapping.set(e,t)}unbindViewElement(t){const e=this.toModelElement(t);if(this._viewToModelMapping.delete(t),this._elementToMarkerNames.has(t))for(const e of this._elementToMarkerNames.get(t))this._unboundMarkerNames.add(e);this._modelToViewMapping.get(e)==t&&this._modelToViewMapping.delete(e)}unbindModelElement(t){const e=this.toViewElement(t);this._modelToViewMapping.delete(t),this._viewToModelMapping.get(e)==t&&this._viewToModelMapping.delete(e)}bindElementToMarker(t,e){const n=this._markerNameToElements.get(e)||new Set;n.add(t);const i=this._elementToMarkerNames.get(t)||new Set;i.add(e),this._markerNameToElements.set(e,n),this._elementToMarkerNames.set(t,i)}unbindElementFromMarkerName(t,e){const n=this._markerNameToElements.get(e);n&&(n.delete(t),0==n.size&&this._markerNameToElements.delete(e));const i=this._elementToMarkerNames.get(t);i&&(i.delete(e),0==i.size&&this._elementToMarkerNames.delete(t))}flushUnboundMarkerNames(){const t=Array.from(this._unboundMarkerNames);return this._unboundMarkerNames.clear(),t}clearBindings(){this._modelToViewMapping=new WeakMap,this._viewToModelMapping=new WeakMap,this._markerNameToElements=new Map,this._elementToMarkerNames=new Map,this._unboundMarkerNames=new Set}toModelElement(t){return this._viewToModelMapping.get(t)}toViewElement(t){return this._modelToViewMapping.get(t)}toModelRange(t){return new Js(this.toModelPosition(t.start),this.toModelPosition(t.end))}toViewRange(t){return new to(this.toViewPosition(t.start),this.toViewPosition(t.end))}toModelPosition(t){const e={viewPosition:t,mapper:this};return this.fire("viewToModelPosition",e),e.modelPosition}toViewPosition(t,e={isPhantom:!1}){const n={modelPosition:t,mapper:this,isPhantom:e.isPhantom};return this.fire("modelToViewPosition",n),n.viewPosition}markerNameToElements(t){const e=this._markerNameToElements.get(t);if(!e)return null;const n=new Set;for(const t of e)if(t.is("attributeElement"))for(const e of t.getElementsWithSameId())n.add(e);else n.add(t);return n}registerViewToModelLength(t,e){this._viewToModelLengthCallbacks.set(t,e)}findMappedViewAncestor(t){let e=t.parent;for(;!this._viewToModelMapping.has(e);)e=e.parent;return e}_toModelOffset(t,e,n){if(n!=t){return this._toModelOffset(t.parent,t.index,n)+this._toModelOffset(t,e,t)}if(t.is("text"))return e;let i=0;for(let n=0;n1?e[0]+":"+e[1]:e[0]}class ea{constructor(t){this.conversionApi=ji({dispatcher:this},t)}convertChanges(t,e,n){for(const e of t.getMarkersToRemove())this.convertMarkerRemove(e.name,e.range,n);for(const e of t.getChanges())"insert"==e.type?this.convertInsert(Js._createFromPositionAndShift(e.position,e.length),n):"remove"==e.type?this.convertRemove(e.position,e.length,e.name,n):this.convertAttribute(e.range,e.attributeKey,e.attributeOldValue,e.attributeNewValue,n);for(const t of this.conversionApi.mapper.flushUnboundMarkerNames()){const i=e.get(t).getRange();this.convertMarkerRemove(t,i,n),this.convertMarkerAdd(t,i,n)}for(const e of t.getMarkersToAdd())this.convertMarkerAdd(e.name,e.range,n)}convertInsert(t,e){this.conversionApi.writer=e,this.conversionApi.consumable=this._createInsertConsumable(t);for(const e of t){const t=e.item,n={item:t,range:Js._createFromPositionAndShift(e.previousPosition,e.length)};this._testAndFire("insert",n);for(const e of t.getAttributeKeys())n.attributeKey=e,n.attributeOldValue=null,n.attributeNewValue=t.getAttribute(e),this._testAndFire(`attribute:${e}`,n)}this._clearConversionApi()}convertRemove(t,e,n,i){this.conversionApi.writer=i,this.fire("remove:"+n,{position:t,length:e},this.conversionApi),this._clearConversionApi()}convertAttribute(t,e,n,i,o){this.conversionApi.writer=o,this.conversionApi.consumable=this._createConsumableForRange(t,`attribute:${e}`);for(const o of t){const t={item:o.item,range:Js._createFromPositionAndShift(o.previousPosition,o.length),attributeKey:e,attributeOldValue:n,attributeNewValue:i};this._testAndFire(`attribute:${e}`,t)}this._clearConversionApi()}convertSelection(t,e,n){const i=Array.from(e.getMarkersAtPosition(t.getFirstPosition()));if(this.conversionApi.writer=n,this.conversionApi.consumable=this._createSelectionConsumable(t,i),this.fire("selection",{selection:t},this.conversionApi),t.isCollapsed){for(const e of i){const n=e.getRange();if(!na(t.getFirstPosition(),e,this.conversionApi.mapper))continue;const i={item:t,markerName:e.name,markerRange:n};this.conversionApi.consumable.test(t,"addMarker:"+e.name)&&this.fire("addMarker:"+e.name,i,this.conversionApi)}for(const e of t.getAttributeKeys()){const n={item:t,range:t.getFirstRange(),attributeKey:e,attributeOldValue:null,attributeNewValue:t.getAttribute(e)};this.conversionApi.consumable.test(t,"attribute:"+n.attributeKey)&&this.fire("attribute:"+n.attributeKey+":$text",n,this.conversionApi)}this._clearConversionApi()}}convertMarkerAdd(t,e,n){if(!e.root.document||"$graveyard"==e.root.rootName)return;this.conversionApi.writer=n;const i="addMarker:"+t,o=new Xs;if(o.add(e,i),this.conversionApi.consumable=o,this.fire(i,{markerName:t,markerRange:e},this.conversionApi),o.test(e,i)){this.conversionApi.consumable=this._createConsumableForRange(e,i);for(const n of e.getItems()){if(!this.conversionApi.consumable.test(n,i))continue;const o={item:n,range:Js._createOn(n),markerName:t,markerRange:e};this.fire(i,o,this.conversionApi)}this._clearConversionApi()}}convertMarkerRemove(t,e,n){e.root.document&&"$graveyard"!=e.root.rootName&&(this.conversionApi.writer=n,this.fire("removeMarker:"+t,{markerName:t,markerRange:e},this.conversionApi),this._clearConversionApi())}_createInsertConsumable(t){const e=new Xs;for(const n of t){const t=n.item;e.add(t,"insert");for(const n of t.getAttributeKeys())e.add(t,"attribute:"+n)}return e}_createConsumableForRange(t,e){const n=new Xs;for(const i of t.getItems())n.add(i,e);return n}_createSelectionConsumable(t,e){const n=new Xs;n.add(t,"selection");for(const i of e)n.add(t,"addMarker:"+i.name);for(const e of t.getAttributeKeys())n.add(t,"attribute:"+e);return n}_testAndFire(t,e){if(!this.conversionApi.consumable.test(e.item,t))return;const n=e.item.name||"$text";this.fire(t+":"+n,e,this.conversionApi)}_clearConversionApi(){delete this.conversionApi.writer,delete this.conversionApi.consumable}}function na(t,e,n){const i=e.getRange(),o=Array.from(t.getAncestors());return o.shift(),o.reverse(),!o.some(t=>{if(i.containsItem(t)){return!!n.toViewElement(t).getCustomProperty("addHighlight")}})}li(ea,ni);class ia{constructor(t,e,n){this._lastRangeBackward=!1,this._ranges=[],this._attrs=new Map,t&&this.setTo(t,e,n)}get anchor(){if(this._ranges.length>0){const t=this._ranges[this._ranges.length-1];return this._lastRangeBackward?t.end:t.start}return null}get focus(){if(this._ranges.length>0){const t=this._ranges[this._ranges.length-1];return this._lastRangeBackward?t.start:t.end}return null}get isCollapsed(){return 1===this._ranges.length&&this._ranges[0].isCollapsed}get rangeCount(){return this._ranges.length}get isBackward(){return!this.isCollapsed&&this._lastRangeBackward}isEqual(t){if(this.rangeCount!=t.rangeCount)return!1;if(0===this.rangeCount)return!0;if(!this.anchor.isEqual(t.anchor)||!this.focus.isEqual(t.focus))return!1;for(const e of this._ranges){let n=!1;for(const i of t._ranges)if(e.isEqual(i)){n=!0;break}if(!n)return!1}return!0}*getRanges(){for(const t of this._ranges)yield new Js(t.start,t.end)}getFirstRange(){let t=null;for(const e of this._ranges)t&&!e.start.isBefore(t.start)||(t=e);return t?new Js(t.start,t.end):null}getLastRange(){let t=null;for(const e of this._ranges)t&&!e.end.isAfter(t.end)||(t=e);return t?new Js(t.start,t.end):null}getFirstPosition(){const t=this.getFirstRange();return t?t.start.clone():null}getLastPosition(){const t=this.getLastRange();return t?t.end.clone():null}setTo(t,e,n){if(null===t)this._setRanges([]);else if(t instanceof ia)this._setRanges(t.getRanges(),t.isBackward);else if(t&&"function"==typeof t.getRanges)this._setRanges(t.getRanges(),t.isBackward);else if(t instanceof Js)this._setRanges([t],!!e&&!!e.backward);else if(t instanceof Ks)this._setRanges([new Js(t)]);else if(t instanceof Us){const i=!!n&&!!n.backward;let o;if("in"==e)o=Js._createIn(t);else if("on"==e)o=Js._createOn(t);else{if(void 0===e)throw new Qn.b("model-selection-setTo-required-second-parameter: selection.setTo requires the second parameter when the first parameter is a node.",[this,t]);o=new Js(Ks._createAt(t,e))}this._setRanges([o],i)}else{if(!bi(t))throw new Qn.b("model-selection-setTo-not-selectable: Cannot set the selection to the given place.",[this,t]);this._setRanges(t,e&&!!e.backward)}}_setRanges(t,e=!1){const n=(t=Array.from(t)).some(e=>{if(!(e instanceof Js))throw new Qn.b("model-selection-set-ranges-not-range: Selection range set to an object that is not an instance of model.Range.",[this,t]);return this._ranges.every(t=>!t.isEqual(e))});if(t.length!==this._ranges.length||n){this._removeAllRanges();for(const e of t)this._pushRange(e);this._lastRangeBackward=!!e,this.fire("change:range",{directChange:!0})}}setFocus(t,e){if(null===this.anchor)throw new Qn.b("model-selection-setFocus-no-ranges: Cannot set selection focus if there are no ranges in selection.",[this,t]);const n=Ks._createAt(t,e);if("same"==n.compareWith(this.focus))return;const i=this.anchor;this._ranges.length&&this._popRange(),"before"==n.compareWith(i)?(this._pushRange(new Js(n,i)),this._lastRangeBackward=!0):(this._pushRange(new Js(i,n)),this._lastRangeBackward=!1),this.fire("change:range",{directChange:!0})}getAttribute(t){return this._attrs.get(t)}getAttributes(){return this._attrs.entries()}getAttributeKeys(){return this._attrs.keys()}hasAttribute(t){return this._attrs.has(t)}removeAttribute(t){this.hasAttribute(t)&&(this._attrs.delete(t),this.fire("change:attribute",{attributeKeys:[t],directChange:!0}))}setAttribute(t,e){this.getAttribute(t)!==e&&(this._attrs.set(t,e),this.fire("change:attribute",{attributeKeys:[t],directChange:!0}))}getSelectedElement(){if(1!==this.rangeCount)return null;const t=this.getFirstRange(),e=t.start.nodeAfter,n=t.end.nodeBefore;return e instanceof Ys&&e==n?e:null}is(t){return"selection"==t||"model:selection"==t}*getSelectedBlocks(){const t=new WeakSet;for(const e of this.getRanges()){const n=sa(e.start,t);n&&aa(n,e)&&(yield n);for(const n of e.getWalker()){const i=n.item;"elementEnd"==n.type&&ra(i,t,e)&&(yield i)}const i=sa(e.end,t);i&&!e.end.isTouching(Ks._createAt(i,0))&&aa(i,e)&&(yield i)}}containsEntireContent(t=this.anchor.root){const e=Ks._createAt(t,0),n=Ks._createAt(t,"end");return e.isTouching(this.getFirstPosition())&&n.isTouching(this.getLastPosition())}_pushRange(t){this._checkRange(t),this._ranges.push(new Js(t.start,t.end))}_checkRange(t){for(let e=0;e0;)this._popRange()}_popRange(){this._ranges.pop()}}function oa(t,e){return!e.has(t)&&(e.add(t),t.document.model.schema.isBlock(t)&&t.parent)}function ra(t,e,n){return oa(t,e)&&aa(t,n)}function sa(t,e){const n=t.parent.document.model.schema,i=t.parent.getAncestors({parentFirst:!0,includeSelf:!0});let o=!1;const r=i.find(t=>!o&&(!(o=n.isLimit(t))&&oa(t,e)));return i.forEach(t=>e.add(t)),r}function aa(t,e){const n=function(t){const e=t.document.model.schema;let n=t.parent;for(;n;){if(e.isBlock(n))return n;n=n.parent}}(t);return!n||!e.containsRange(Js._createOn(n),!0)}li(ia,ni);class ca extends Js{constructor(t,e){super(t,e),la.call(this)}detach(){this.stopListening()}is(t){return"liveRange"==t||"model:liveRange"==t||super.is(t)}toRange(){return new Js(this.start,this.end)}static fromRange(t){return new ca(t.start,t.end)}}function la(){this.listenTo(this.root.document.model,"applyOperation",(t,e)=>{const n=e[0];n.isDocumentOperation&&da.call(this,n)},{priority:"low"})}function da(t){const e=this.getTransformedByOperation(t),n=Js._createFromRanges(e),i=!n.isEqual(this),o=function(t,e){switch(e.type){case"insert":return t.containsPosition(e.position);case"move":case"remove":case"reinsert":case"merge":return t.containsPosition(e.sourcePosition)||t.start.isEqual(e.sourcePosition)||t.containsPosition(e.targetPosition);case"split":return t.containsPosition(e.splitPosition)||t.containsPosition(e.insertionPosition)}return!1}(this,t);let r=null;if(i){"$graveyard"==n.root.rootName&&(r="remove"==t.type?t.sourcePosition:t.deletionPosition);const e=this.toRange();this.start=n.start,this.end=n.end,this.fire("change:range",e,{deletionPosition:r})}else o&&this.fire("change:content",this.toRange(),{deletionPosition:r})}li(ca,ni);const ha="selection:";class ua{constructor(t){this._selection=new fa(t),this._selection.delegate("change:range").to(this),this._selection.delegate("change:attribute").to(this)}get isCollapsed(){return this._selection.isCollapsed}get anchor(){return this._selection.anchor}get focus(){return this._selection.focus}get rangeCount(){return this._selection.rangeCount}get hasOwnRange(){return this._selection.hasOwnRange}get isBackward(){return this._selection.isBackward}get isGravityOverridden(){return this._selection.isGravityOverridden}get markers(){return this._selection.markers}get _ranges(){return this._selection._ranges}getRanges(){return this._selection.getRanges()}getFirstPosition(){return this._selection.getFirstPosition()}getLastPosition(){return this._selection.getLastPosition()}getFirstRange(){return this._selection.getFirstRange()}getLastRange(){return this._selection.getLastRange()}getSelectedBlocks(){return this._selection.getSelectedBlocks()}getSelectedElement(){return this._selection.getSelectedElement()}containsEntireContent(t){return this._selection.containsEntireContent(t)}destroy(){this._selection.destroy()}getAttributeKeys(){return this._selection.getAttributeKeys()}getAttributes(){return this._selection.getAttributes()}getAttribute(t){return this._selection.getAttribute(t)}hasAttribute(t){return this._selection.hasAttribute(t)}refresh(){this._selection._updateMarkers(),this._selection._updateAttributes(!1)}is(t){return"selection"==t||"model:selection"==t||"documentSelection"==t||"model:documentSelection"==t}_setFocus(t,e){this._selection.setFocus(t,e)}_setTo(t,e,n){this._selection.setTo(t,e,n)}_setAttribute(t,e){this._selection.setAttribute(t,e)}_removeAttribute(t){this._selection.removeAttribute(t)}_getStoredAttributes(){return this._selection._getStoredAttributes()}_overrideGravity(){return this._selection.overrideGravity()}_restoreGravity(t){this._selection.restoreGravity(t)}static _getStoreAttributeKey(t){return ha+t}static _isStoreAttributeKey(t){return t.startsWith(ha)}}li(ua,ni);class fa extends ia{constructor(t){super(),this.markers=new ro({idProperty:"name"}),this._model=t.model,this._document=t,this._attributePriority=new Map,this._fixGraveyardRangesData=[],this._hasChangedRange=!1,this._overriddenGravityRegister=new Set,this.listenTo(this._model,"applyOperation",(t,e)=>{const n=e[0];if(n.isDocumentOperation&&"marker"!=n.type&&"rename"!=n.type&&"noop"!=n.type){for(;this._fixGraveyardRangesData.length;){const{liveRange:t,sourcePosition:e}=this._fixGraveyardRangesData.shift();this._fixGraveyardSelection(t,e)}this._hasChangedRange&&(this._hasChangedRange=!1,this.fire("change:range",{directChange:!1}))}},{priority:"lowest"}),this.on("change:range",()=>{for(const t of this.getRanges())if(!this._document._validateSelectionRange(t))throw new Qn.b("document-selection-wrong-position: Range from document selection starts or ends at incorrect position.",this,{range:t})}),this.listenTo(this._model.markers,"update",()=>this._updateMarkers()),this.listenTo(this._document,"change",(t,e)=>{!function(t,e){const n=t.document.differ;for(const i of n.getChanges()){if("insert"!=i.type)continue;const n=i.position.parent;i.length===n.maxOffset&&t.enqueueChange(e,t=>{const e=Array.from(n.getAttributeKeys()).filter(t=>t.startsWith(ha));for(const i of e)t.removeAttribute(i,n)})}}(this._model,e)})}get isCollapsed(){return 0===this._ranges.length?this._document._getDefaultRange().isCollapsed:super.isCollapsed}get anchor(){return super.anchor||this._document._getDefaultRange().start}get focus(){return super.focus||this._document._getDefaultRange().end}get rangeCount(){return this._ranges.length?this._ranges.length:1}get hasOwnRange(){return this._ranges.length>0}get isGravityOverridden(){return!!this._overriddenGravityRegister.size}destroy(){for(let t=0;t{this._hasChangedRange=!0,e.root==this._document.graveyard&&this._fixGraveyardRangesData.push({liveRange:e,sourcePosition:i.deletionPosition})}),e}_updateMarkers(){const t=[];for(const e of this._model.markers){const n=e.getRange();for(const i of this.getRanges())n.containsRange(i,!i.isCollapsed)&&t.push(e)}for(const e of t)this.markers.has(e)||this.markers.add(e);for(const e of Array.from(this.markers))t.includes(e)||this.markers.remove(e)}_updateAttributes(t){const e=Fs(this._getSurroundingAttributes()),n=Fs(this.getAttributes());if(t)this._attributePriority=new Map,this._attrs=new Map;else for(const[t,e]of this._attributePriority)"low"==e&&(this._attrs.delete(t),this._attributePriority.delete(t));this._setAttributesTo(e);const i=[];for(const[t,e]of this.getAttributes())n.has(t)&&n.get(t)===e||i.push(t);for(const[t]of n)this.hasAttribute(t)||i.push(t);i.length>0&&this.fire("change:attribute",{attributeKeys:i,directChange:!1})}_setAttribute(t,e,n=!0){const i=n?"normal":"low";return("low"!=i||"normal"!=this._attributePriority.get(t))&&(super.getAttribute(t)!==e&&(this._attrs.set(t,e),this._attributePriority.set(t,i),!0))}_removeAttribute(t,e=!0){const n=e?"normal":"low";return("low"!=n||"normal"!=this._attributePriority.get(t))&&(this._attributePriority.set(t,n),!!super.hasAttribute(t)&&(this._attrs.delete(t),!0))}_setAttributesTo(t){const e=new Set;for(const[e,n]of this.getAttributes())t.get(e)!==n&&this._removeAttribute(e,!1);for(const[n,i]of t){this._setAttribute(n,i,!1)&&e.add(n)}return e}*_getStoredAttributes(){const t=this.getFirstPosition().parent;if(this.isCollapsed&&t.isEmpty)for(const e of t.getAttributeKeys())if(e.startsWith(ha)){const n=e.substr(ha.length);yield[n,t.getAttribute(e)]}}_getSurroundingAttributes(){const t=this.getFirstPosition(),e=this._model.schema;let n=null;if(this.isCollapsed){const e=t.textNode?t.textNode:t.nodeBefore,i=t.textNode?t.textNode:t.nodeAfter;if(this.isGravityOverridden||(n=ga(e)),n||(n=ga(i)),!this.isGravityOverridden&&!n){let t=e;for(;t&&!n;)n=ga(t=t.previousSibling)}if(!n){let t=i;for(;t&&!n;)n=ga(t=t.nextSibling)}n||(n=this._getStoredAttributes())}else{const t=this.getFirstRange();for(const i of t){if(i.item.is("element")&&e.isObject(i.item))break;if("text"==i.type){n=i.item.getAttributes();break}}}return n}_fixGraveyardSelection(t,e){const n=e.clone(),i=this._model.schema.getNearestSelectionRange(n),o=this._ranges.indexOf(t);if(this._ranges.splice(o,1),t.detach(),i){const t=this._prepareRange(i);this._ranges.splice(o,0,t)}}}function ga(t){return t instanceof qs||t instanceof Hs?t.getAttributes():null}class ma{constructor(t){this._dispatchers=t}add(t){for(const e of this._dispatchers)t(e);return this}}var pa=1,ba=4;var wa=function(t){return Un(t,pa|ba)};class ka extends ma{elementToElement(t){return this.add(function(t){return(t=wa(t)).view=va(t.view,"container"),e=>{e.on("insert:"+t.model,function(t){return(e,n,i)=>{const o=t(n.item,i.writer);if(!o)return;if(!i.consumable.consume(n.item,"insert"))return;const r=i.mapper.toViewPosition(n.range.start);i.mapper.bindElements(n.item,o),i.writer.insert(r,o)}}(t.view),{priority:t.converterPriority||"normal"})}}(t))}attributeToElement(t){return this.add(function(t){let e="attribute:"+((t=wa(t)).model.key?t.model.key:t.model);t.model.name&&(e+=":"+t.model.name);if(t.model.values)for(const e of t.model.values)t.view[e]=va(t.view[e],"attribute");else t.view=va(t.view,"attribute");const n=ya(t);return i=>{i.on(e,function(t){return(e,n,i)=>{const o=t(n.attributeOldValue,i.writer),r=t(n.attributeNewValue,i.writer);if(!o&&!r)return;if(!i.consumable.consume(n.item,e.name))return;const s=i.writer,a=s.document.selection;if(n.item instanceof ia||n.item instanceof ua)s.wrap(a.getFirstRange(),r);else{let t=i.mapper.toViewRange(n.range);null!==n.attributeOldValue&&o&&(t=s.unwrap(t,o)),null!==n.attributeNewValue&&r&&s.wrap(t,r)}}}(n),{priority:t.converterPriority||"normal"})}}(t))}attributeToAttribute(t){return this.add(function(t){let e="attribute:"+((t=wa(t)).model.key?t.model.key:t.model);t.model.name&&(e+=":"+t.model.name);if(t.model.values)for(const e of t.model.values)t.view[e]=xa(t.view[e]);else t.view=xa(t.view);const n=ya(t);return i=>{i.on(e,function(t){return(e,n,i)=>{const o=t(n.attributeOldValue,n),r=t(n.attributeNewValue,n);if(!o&&!r)return;if(!i.consumable.consume(n.item,e.name))return;const s=i.mapper.toViewElement(n.item),a=i.writer;if(!s)throw new Qn.b("conversion-attribute-to-attribute-on-text: Trying to convert text node's attribute with attribute-to-attribute converter.",[n,i]);if(null!==n.attributeOldValue&&o)if("class"==o.key){const t=Array.isArray(o.value)?o.value:[o.value];for(const e of t)a.removeClass(e,s)}else if("style"==o.key){const t=Object.keys(o.value);for(const e of t)a.removeStyle(e,s)}else a.removeAttribute(o.key,s);if(null!==n.attributeNewValue&&r)if("class"==r.key){const t=Array.isArray(r.value)?r.value:[r.value];for(const e of t)a.addClass(e,s)}else if("style"==r.key){const t=Object.keys(r.value);for(const e of t)a.setStyle(e,r.value[e],s)}else a.setAttribute(r.key,r.value,s)}}(n),{priority:t.converterPriority||"normal"})}}(t))}markerToElement(t){return this.add(function(t){return(t=wa(t)).view=va(t.view,"ui"),e=>{e.on("addMarker:"+t.model,function(t){return(e,n,i)=>{n.isOpening=!0;const o=t(n,i.writer);n.isOpening=!1;const r=t(n,i.writer);if(!o||!r)return;const s=n.markerRange;if(s.isCollapsed&&!i.consumable.consume(s,e.name))return;for(const t of s)if(!i.consumable.consume(t.item,e.name))return;const a=i.mapper,c=i.writer;c.insert(a.toViewPosition(s.start),o),i.mapper.bindElementToMarker(o,n.markerName),s.isCollapsed||(c.insert(a.toViewPosition(s.end),r),i.mapper.bindElementToMarker(r,n.markerName)),e.stop()}}(t.view),{priority:t.converterPriority||"normal"}),e.on("removeMarker:"+t.model,(t.view,(t,e,n)=>{const i=n.mapper.markerNameToElements(e.markerName);if(i){for(const t of i)n.mapper.unbindElementFromMarkerName(t,e.markerName),n.writer.clear(n.writer.createRangeOn(t),t);n.writer.clearClonedElementsGroup(e.markerName),t.stop()}}),{priority:t.converterPriority||"normal"})}}(t))}markerToHighlight(t){return this.add(function(t){return e=>{e.on("addMarker:"+t.model,function(t){return(e,n,i)=>{if(!n.item)return;if(!(n.item instanceof ia||n.item instanceof ua||n.item.is("textProxy")))return;const o=Aa(t,n,i);if(!o)return;if(!i.consumable.consume(n.item,e.name))return;const r=_a(o),s=i.writer,a=s.document.selection;if(n.item instanceof ia||n.item instanceof ua)s.wrap(a.getFirstRange(),r,a);else{const t=i.mapper.toViewRange(n.range),e=s.wrap(t,r);for(const t of e.getItems())if(t.is("attributeElement")&&t.isSimilar(r)){i.mapper.bindElementToMarker(t,n.markerName);break}}}}(t.view),{priority:t.converterPriority||"normal"}),e.on("addMarker:"+t.model,function(t){return(e,n,i)=>{if(!n.item)return;if(!(n.item instanceof Ys))return;const o=Aa(t,n,i);if(!o)return;if(!i.consumable.test(n.item,e.name))return;const r=i.mapper.toViewElement(n.item);if(r&&r.getCustomProperty("addHighlight")){i.consumable.consume(n.item,e.name);for(const t of Js._createIn(n.item))i.consumable.consume(t.item,e.name);r.getCustomProperty("addHighlight")(r,o,i.writer),i.mapper.bindElementToMarker(r,n.markerName)}}}(t.view),{priority:t.converterPriority||"normal"}),e.on("removeMarker:"+t.model,function(t){return(e,n,i)=>{if(n.markerRange.isCollapsed)return;const o=Aa(t,n,i);if(!o)return;const r=_a(o),s=i.mapper.markerNameToElements(n.markerName);if(s){for(const t of s)i.mapper.unbindElementFromMarkerName(t,n.markerName),t.is("attributeElement")?i.writer.unwrap(i.writer.createRangeOn(t),r):t.getCustomProperty("removeHighlight")(t,o.id,i.writer);i.writer.clearClonedElementsGroup(n.markerName),e.stop()}}}(t.view),{priority:t.converterPriority||"normal"})}}(t))}}function _a(t){const e=new co("span",t.attributes);return t.classes&&e._addClass(t.classes),t.priority&&(e._priority=t.priority),e._id=t.id,e}function va(t,e){return"function"==typeof t?t:(n,i)=>(function(t,e,n){"string"==typeof t&&(t={name:t});let i;const 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wi(t.view);return(i,o,r)=>{const s=n.match(o.viewItem);if(!s)return;const a=t.model.key,c="function"==typeof t.model.value?t.model.value(o.viewItem):t.model.value;null!==c&&(!function(t,e){const n="function"==typeof t?t(e):t;if("object"==typeof n&&!Pa(n))return!1;return!n.classes&&!n.attributes&&!n.styles}(t.view,o.viewItem)?delete s.match.name:s.match.name=!0,r.consumable.test(o.viewItem,s.match)&&(o.modelRange||(o=Object.assign(o,r.convertChildren(o.viewItem,o.modelCursor))),function(t,e,n,i){let o=!1;for(const r of Array.from(t.getItems({shallow:n})))i.schema.checkAttribute(r,e.key)&&(i.writer.setAttribute(e.key,e.value,r),o=!0);return o}(o.modelRange,{key:a,value:c},e,r)&&r.consumable.consume(o.viewItem,s.match)))}}class Ea{constructor(t){this.model=t,this.view=new Bs,this.mapper=new Zs,this.downcastDispatcher=new ea({mapper:this.mapper});const e=this.model.document,n=e.selection,i=this.model.markers;this.listenTo(this.model,"_beforeChanges",()=>{this.view._disableRendering(!0)},{priority:"highest"}),this.listenTo(this.model,"_afterChanges",()=>{this.view._disableRendering(!1)},{priority:"lowest"}),this.listenTo(e,"change",()=>{this.view.change(t=>{this.downcastDispatcher.convertChanges(e.differ,i,t),this.downcastDispatcher.convertSelection(n,i,t)})},{priority:"low"}),this.listenTo(this.view.document,"selectionChange",function(t,e){return(n,i)=>{const o=i.newSelection,r=new ia,s=[];for(const t of o.getRanges())s.push(e.toModelRange(t));r.setTo(s,{backward:o.isBackward}),r.isEqual(t.document.selection)||t.change(t=>{t.setSelection(r)})}}(this.model,this.mapper)),this.downcastDispatcher.on("insert:$text",(t,e,n)=>{if(!n.consumable.consume(e.item,"insert"))return;const i=n.writer,o=n.mapper.toViewPosition(e.range.start),r=i.createText(e.item.data);i.insert(o,r)},{priority:"lowest"}),this.downcastDispatcher.on("remove",(t,e,n)=>{const i=n.mapper.toViewPosition(e.position),o=e.position.getShiftedBy(e.length),r=n.mapper.toViewPosition(o,{isPhantom:!0}),s=n.writer.createRange(i,r),a=n.writer.remove(s.getTrimmed());for(const t of n.writer.createRangeIn(a).getItems())n.mapper.unbindViewElement(t)},{priority:"low"}),this.downcastDispatcher.on("selection",(t,e,n)=>{const i=n.writer,o=i.document.selection;for(const t of o.getRanges())t.isCollapsed&&t.end.parent.document&&n.writer.mergeAttributes(t.start);i.setSelection(null)},{priority:"low"}),this.downcastDispatcher.on("selection",(t,e,n)=>{const i=e.selection;if(i.isCollapsed)return;if(!n.consumable.consume(i,"selection"))return;const o=[];for(const t of i.getRanges()){const e=n.mapper.toViewRange(t);o.push(e)}n.writer.setSelection(o,{backward:i.isBackward})},{priority:"low"}),this.downcastDispatcher.on("selection",(t,e,n)=>{const i=e.selection;if(!i.isCollapsed)return;if(!n.consumable.consume(i,"selection"))return;const o=n.writer,r=i.getFirstPosition(),s=n.mapper.toViewPosition(r),a=o.breakAttributes(s);o.setSelection(a)},{priority:"low"}),this.view.document.roots.bindTo(this.model.document.roots).using(t=>{if("$graveyard"==t.rootName)return null;const e=new Ji(t.name);return e.rootName=t.rootName,e._document=this.view.document,this.mapper.bindElements(t,e),e})}destroy(){this.view.destroy(),this.stopListening()}}li(Ea,Ui);class Ia{constructor(t,e=[]){this._editor=t,this._availablePlugins=new Map,this._plugins=new Map;for(const t of e)this._availablePlugins.set(t,t),t.pluginName&&this._availablePlugins.set(t.pluginName,t)}*[Symbol.iterator](){for(const t of this._plugins)"function"==typeof t[0]&&(yield t)}get(t){const e=this._plugins.get(t);if(!e){const 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Da{constructor(t={}){this.uiLanguage=t.uiLanguage||"en",this.contentLanguage=t.contentLanguage||this.uiLanguage,this.uiLanguageDirection=La(this.uiLanguage),this.contentLanguageDirection=La(this.contentLanguage),this.t=(...t)=>this._t(...t)}get language(){return console.warn("locale-deprecated-language-property: The Locale#language property has been deprecated and will be removed in the near future. 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t?t:t.is&&(t.is("text")||t.is("textProxy"))?"$text":t.name,this.getDefinitions()[e]}isRegistered(t){return!!this.getDefinition(t)}isBlock(t){const e=this.getDefinition(t);return!(!e||!e.isBlock)}isLimit(t){const e=this.getDefinition(t);return!!e&&!(!e.isLimit&&!e.isObject)}isObject(t){const e=this.getDefinition(t);return!(!e||!e.isObject)}isInline(t){const e=this.getDefinition(t);return!(!e||!e.isInline)}checkChild(t,e){return!!e&&this._checkContextMatch(e,t)}checkAttribute(t,e){const n=this.getDefinition(t.last);return!!n&&n.allowAttributes.includes(e)}checkMerge(t,e=null){if(t instanceof Ks){const e=t.nodeBefore,n=t.nodeAfter;if(!(e instanceof Ys))throw new Qn.b("schema-check-merge-no-element-before: The node before the merge position must be an element.",this);if(!(n instanceof Ys))throw new Qn.b("schema-check-merge-no-element-after: The node after the merge position must be an element.",this);return this.checkMerge(e,n)}for(const n of e.getChildren())if(!this.checkChild(t,n))return!1;return!0}addChildCheck(t){this.on("checkChild",(e,[n,i])=>{if(!i)return;const o=t(n,i);"boolean"==typeof o&&(e.stop(),e.return=o)},{priority:"high"})}addAttributeCheck(t){this.on("checkAttribute",(e,[n,i])=>{const o=t(n,i);"boolean"==typeof o&&(e.stop(),e.return=o)},{priority:"high"})}setAttributeProperties(t,e){this._attributeProperties[t]=Object.assign(this.getAttributeProperties(t),e)}getAttributeProperties(t){return this._attributeProperties[t]||{}}getLimitElement(t){let e;if(t instanceof Ks)e=t.parent;else{e=(t instanceof Js?[t]:Array.from(t.getRanges())).reduce((t,e)=>{const n=e.getCommonAncestor();return t?t.getCommonAncestor(n,{includeSelf:!0}):n},null)}for(;!this.isLimit(e)&&e.parent;)e=e.parent;return e}checkAttributeInSelection(t,e){if(t.isCollapsed){const n=[...t.getFirstPosition().getAncestors(),new Hs("",t.getAttributes())];return this.checkAttribute(n,e)}{const n=t.getRanges();for(const t of n)for(const n of t)if(this.checkAttribute(n.item,e))return!0}return!1}*getValidRanges(t,e){t=function*(t){for(const e of t)yield*e.getMinimalFlatRanges()}(t);for(const n of t)yield*this._getValidRangesForRange(n,e)}getNearestSelectionRange(t,e="both"){if(this.checkChild(t,"$text"))return new Js(t);let n,i;"both"!=e&&"backward"!=e||(n=new $s({startPosition:t,direction:"backward"})),"both"!=e&&"forward"!=e||(i=new $s({startPosition:t}));for(const t of function*(t,e){let n=!1;for(;!n;){if(n=!0,t){const e=t.next();e.done||(n=!1,yield{walker:t,value:e.value})}if(e){const t=e.next();t.done||(n=!1,yield{walker:e,value:t.value})}}}(n,i)){const e=t.walker==n?"elementEnd":"elementStart",i=t.value;if(i.type==e&&this.isObject(i.item))return Js._createOn(i.item);if(this.checkChild(i.nextPosition,"$text"))return new Js(i.nextPosition)}return null}findAllowedParent(t,e){let n=t.parent;for(;n;){if(this.checkChild(n,e))return n;if(this.isLimit(n))return null;n=n.parent}return null}removeDisallowedAttributes(t,e){for(const n of t)if(n.is("text"))Ja(this,n,e);else{const t=Js._createIn(n).getPositions();for(const n of t){Ja(this,n.nodeBefore||n.parent,e)}}}createContext(t){return new Ba(t)}_clearCache(){this._compiledDefinitions=null}_compile(){const t={},e=this._sourceDefinitions,n=Object.keys(e);for(const i of n)t[i]=Fa(e[i],i);for(const e of n)Ua(t,e);for(const e of n)Ha(t,e);for(const e of n)qa(t,e),Wa(t,e);for(const e of n)Ya(t,e),$a(t,e);this._compiledDefinitions=t}_checkContextMatch(t,e,n=e.length-1){const i=e.getItem(n);if(t.allowIn.includes(i.name)){if(0==n)return!0;{const t=this.getDefinition(i);return this._checkContextMatch(t,e,n-1)}}return!1}*_getValidRangesForRange(t,e){let n=t.start,i=t.start;for(const o of t.getItems({shallow:!0}))o.is("element")&&(yield*this._getValidRangesForRange(Js._createIn(o),e)),this.checkAttribute(o,e)||(n.isEqual(i)||(yield new Js(n,i)),n=Ks._createAfter(o)),i=Ks._createAfter(o);n.isEqual(i)||(yield new 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Map,this._modelCursor=null,this.conversionApi=Object.assign({},t),this.conversionApi.convertItem=this._convertItem.bind(this),this.conversionApi.convertChildren=this._convertChildren.bind(this),this.conversionApi.splitToAllowedParent=this._splitToAllowedParent.bind(this),this.conversionApi.getSplitParts=this._getSplitParts.bind(this)}convert(t,e,n=["$root"]){this.fire("viewCleanup",t),this._modelCursor=function(t,e){let n;for(const i of new Ba(t)){const t={};for(const e of i.getAttributeKeys())t[e]=i.getAttribute(e);const o=e.createElement(i.name,t);n&&e.append(o,n),n=Ks._createAt(o,0)}return n}(n,e),this.conversionApi.writer=e,this.conversionApi.consumable=ja.createFrom(t),this.conversionApi.store={};const{modelRange:i}=this._convertItem(t,this._modelCursor),o=e.createDocumentFragment();if(i){this._removeEmptyElements();for(const t of Array.from(this._modelCursor.parent.getChildren()))e.append(t,o);o.markers=function(t,e){const n=new Set,i=new Map,o=Js._createIn(t).getItems();for(const t of o)"$marker"==t.name&&n.add(t);for(const t of n){const n=t.getAttribute("data-name"),o=e.createPositionBefore(t);i.has(n)?i.get(n).end=o.clone():i.set(n,new Js(o.clone())),e.remove(t)}return i}(o,e)}return this._modelCursor=null,this._splitParts.clear(),this.conversionApi.writer=null,this.conversionApi.store=null,o}_convertItem(t,e){const n=Object.assign({viewItem:t,modelCursor:e,modelRange:null});if(t.is("element")?this.fire("element:"+t.name,n,this.conversionApi):t.is("text")?this.fire("text",n,this.conversionApi):this.fire("documentFragment",n,this.conversionApi),n.modelRange&&!(n.modelRange instanceof Js))throw new Qn.b("view-conversion-dispatcher-incorrect-result: Incorrect conversion result was dropped.",this);return{modelRange:n.modelRange,modelCursor:n.modelCursor}}_convertChildren(t,e){const n=new Js(e);let i=e;for(const e of Array.from(t.getChildren())){const t=this._convertItem(e,i);t.modelRange instanceof Js&&(n.end=t.modelRange.end,i=t.modelCursor)}return{modelRange:n,modelCursor:i}}_splitToAllowedParent(t,e){const n=this.conversionApi.schema.findAllowedParent(e,t);if(!n)return null;if(n===e.parent)return{position:e};if(this._modelCursor.parent.getAncestors().includes(n))return null;const i=this.conversionApi.writer.split(e,n),o=[];for(const t of i.range.getWalker())if("elementEnd"==t.type)o.push(t.item);else{const e=o.pop(),n=t.item;this._registerSplitPair(e,n)}return{position:i.position,cursorParent:i.range.end.parent}}_registerSplitPair(t,e){this._splitParts.has(t)||this._splitParts.set(t,[t]);const n=this._splitParts.get(t);this._splitParts.set(e,n),n.push(e)}_getSplitParts(t){let e;return e=this._splitParts.has(t)?this._splitParts.get(t):[t]}_removeEmptyElements(){let t=!1;for(const e of this._splitParts.keys())e.isEmpty&&(this.conversionApi.writer.remove(e),this._splitParts.delete(e),t=!0);t&&this._removeEmptyElements()}}li(Za,ni);class Xa{constructor(t,e){this.model=t,this.processor=e,this.mapper=new Zs,this.downcastDispatcher=new ea({mapper:this.mapper}),this.downcastDispatcher.on("insert:$text",(t,e,n)=>{if(!n.consumable.consume(e.item,"insert"))return;const i=n.writer,o=n.mapper.toViewPosition(e.range.start),r=i.createText(e.item.data);i.insert(o,r)},{priority:"lowest"}),this.upcastDispatcher=new Za({schema:t.schema}),this.upcastDispatcher.on("text",(t,e,n)=>{if(n.schema.checkChild(e.modelCursor,"$text")&&n.consumable.consume(e.viewItem)){const t=n.writer.createText(e.viewItem.data);n.writer.insert(t,e.modelCursor),e.modelRange=Js._createFromPositionAndShift(e.modelCursor,t.offsetSize),e.modelCursor=e.modelRange.end}},{priority:"lowest"}),this.upcastDispatcher.on("element",(t,e,n)=>{if(!e.modelRange&&n.consumable.consume(e.viewItem,{name:!0})){const{modelRange:t,modelCursor:i}=n.convertChildren(e.viewItem,e.modelCursor);e.modelRange=t,e.modelCursor=i}},{priority:"lowest"}),this.upcastDispatcher.on("documentFragment",(t,e,n)=>{if(!e.modelRange&&n.consumable.consume(e.viewItem,{name:!0})){const{modelRange:t,modelCursor:i}=n.convertChildren(e.viewItem,e.modelCursor);e.modelRange=t,e.modelCursor=i}},{priority:"lowest"}),this.decorate("init"),this.on("init",()=>{this.fire("ready")},{priority:"lowest"})}get(t){const{rootName:e="main",trim:n="empty"}=t||{};if(!this._checkIfRootsExists([e]))throw new Qn.b("datacontroller-get-non-existent-root: Attempting to get data from a non-existing root.",this);const i=this.model.document.getRoot(e);return"empty"!==n||this.model.hasContent(i,{ignoreWhitespaces:!0})?this.stringify(i):""}stringify(t){const e=this.toView(t);return this.processor.toData(e)}toView(t){this.mapper.clearBindings();const e=Js._createIn(t),n=new Co,i=new Po(new so);if(this.mapper.bindElements(t,n),this.downcastDispatcher.convertInsert(e,i),!t.is("documentFragment")){const e=function(t){const e=[],n=t.root.document;if(!n)return[];const i=Js._createIn(t);for(const t of n.model.markers){const n=i.getIntersection(t.getRange());n&&e.push([t.name,n])}return e}(t);for(const[t,n]of e)this.downcastDispatcher.convertMarkerAdd(t,n,i)}return n}init(t){if(this.model.document.version)throw new Qn.b("datacontroller-init-document-not-empty: Trying to set initial data to not empty document.",this);let e={};if("string"==typeof t?e.main=t:e=t,!this._checkIfRootsExists(Object.keys(e)))throw new Qn.b("datacontroller-init-non-existent-root: Attempting to init data on a non-existing root.",this);return this.model.enqueueChange("transparent",t=>{for(const n of Object.keys(e)){const i=this.model.document.getRoot(n);t.insert(this.parse(e[n],i),i,0)}}),Promise.resolve()}set(t){let e={};if("string"==typeof t?e.main=t:e=t,!this._checkIfRootsExists(Object.keys(e)))throw new Qn.b("datacontroller-set-non-existent-root: Attempting to set data on a non-existing root.",this);this.model.enqueueChange("transparent",t=>{t.setSelection(null),t.removeSelectionAttribute(this.model.document.selection.getAttributeKeys());for(const n of Object.keys(e)){const i=this.model.document.getRoot(n);t.remove(t.createRangeIn(i)),t.insert(this.parse(e[n],i),i,0)}})}parse(t,e="$root"){const n=this.processor.toView(t);return this.toModel(n,e)}toModel(t,e="$root"){return this.model.change(n=>this.upcastDispatcher.convert(t,n,e))}destroy(){this.stopListening()}_checkIfRootsExists(t){for(const e of t)if(!this.model.document.getRootNames().includes(e))return!1;return!0}}li(Xa,Ui);class tc{constructor(t,e){this._helpers=new Map,this._downcast=Array.isArray(t)?t:[t],this._createConversionHelpers({name:"downcast",dispatchers:this._downcast,isDowncast:!0}),this._upcast=Array.isArray(e)?e:[e],this._createConversionHelpers({name:"upcast",dispatchers:this._upcast,isDowncast:!1})}addAlias(t,e){const n=this._downcast.includes(e);if(!this._upcast.includes(e)&&!n)throw new Qn.b("conversion-add-alias-dispatcher-not-registered: Trying to register and alias for a dispatcher that nas not been registered.",this);this._createConversionHelpers({name:t,dispatchers:[e],isDowncast:n})}for(t){if(!this._helpers.has(t))throw new Qn.b("conversion-for-unknown-group: Trying to add a converter to an unknown dispatchers group.",this);return this._helpers.get(t)}elementToElement(t){this.for("downcast").elementToElement(t);for(const{model:e,view:n}of ec(t))this.for("upcast").elementToElement({model:e,view:n,converterPriority:t.converterPriority})}attributeToElement(t){this.for("downcast").attributeToElement(t);for(const{model:e,view:n}of ec(t))this.for("upcast").elementToAttribute({view:n,model:e,converterPriority:t.converterPriority})}attributeToAttribute(t){this.for("downcast").attributeToAttribute(t);for(const{model:e,view:n}of ec(t))this.for("upcast").attributeToAttribute({view:n,model:e})}_createConversionHelpers({name:t,dispatchers:e,isDowncast:n}){if(this._helpers.has(t))throw new Qn.b("conversion-group-exists: Trying to register a group name that has already been registered.",this);const i=n?new ka(e):new Ta(e);this._helpers.set(t,i)}}function*ec(t){if(t.model.values)for(const e of t.model.values){const n={key:t.model.key,value:e},i=t.view[e],o=t.upcastAlso?t.upcastAlso[e]:void 0;yield*nc(n,i,o)}else yield*nc(t.model,t.view,t.upcastAlso)}function*nc(t,e,n){if(yield{model:t,view:e},n){n=Array.isArray(n)?n:[n];for(const e of n)yield{model:t,view:e}}}class ic{constructor(t="default"){this.operations=[],this.type=t}get baseVersion(){for(const t of this.operations)if(null!==t.baseVersion)return t.baseVersion;return null}addOperation(t){return t.batch=this,this.operations.push(t),t}}class oc{constructor(t){this.baseVersion=t,this.isDocumentOperation=null!==this.baseVersion,this.batch=null}_validate(){}toJSON(){const t=Object.assign({},this);return t.__className=this.constructor.className,delete t.batch,delete t.isDocumentOperation,t}static get className(){return"Operation"}static fromJSON(t){return new this(t.baseVersion)}}class rc{constructor(t){this.markers=new Map,this._children=new Ws,t&&this._insertChild(0,t)}[Symbol.iterator](){return this.getChildren()}get childCount(){return this._children.length}get maxOffset(){return this._children.maxOffset}get isEmpty(){return 0===this.childCount}get root(){return this}get parent(){return null}is(t){return"documentFragment"==t||"model:documentFragment"==t}getChild(t){return this._children.getNode(t)}getChildren(){return this._children[Symbol.iterator]()}getChildIndex(t){return this._children.getNodeIndex(t)}getChildStartOffset(t){return this._children.getNodeStartOffset(t)}getPath(){return[]}getNodeByPath(t){let e=this;for(const n of t)e=e.getChild(e.offsetToIndex(n));return e}offsetToIndex(t){return this._children.offsetToIndex(t)}toJSON(){const t=[];for(const e of this._children)t.push(e.toJSON());return t}static fromJSON(t){const e=[];for(const n of t)n.name?e.push(Ys.fromJSON(n)):e.push(Hs.fromJSON(n));return new rc(e)}_appendChild(t){this._insertChild(this.childCount,t)}_insertChild(t,e){const n=function(t){if("string"==typeof t)return[new Hs(t)];bi(t)||(t=[t]);return Array.from(t).map(t=>"string"==typeof t?new Hs(t):t instanceof qs?new Hs(t.data,t.getAttributes()):t)}(e);for(const t of n)null!==t.parent&&t._remove(),t.parent=this;this._children._insertNodes(t,n)}_removeChildren(t,e=1){const n=this._children._removeNodes(t,e);for(const t of n)t.parent=null;return n}}function sc(t,e){const n=(e=lc(e)).reduce((t,e)=>t+e.offsetSize,0),i=t.parent;hc(t);const o=t.index;return i._insertChild(o,e),dc(i,o+e.length),dc(i,o),new Js(t,t.getShiftedBy(n))}function ac(t){if(!t.isFlat)throw new Qn.b("operation-utils-remove-range-not-flat: Trying to remove a range which starts and ends in different element.",this);const e=t.start.parent;hc(t.start),hc(t.end);const n=e._removeChildren(t.start.index,t.end.index-t.start.index);return dc(e,t.start.index),n}function cc(t,e){if(!t.isFlat)throw new Qn.b("operation-utils-move-range-not-flat: Trying to move a range which starts and ends in different element.",this);const n=ac(t);return sc(e=e._getTransformedByDeletion(t.start,t.end.offset-t.start.offset),n)}function lc(t){const e=[];t instanceof Array||(t=[t]);for(let n=0;nt.maxOffset)throw new Qn.b("move-operation-nodes-do-not-exist: The nodes which should be moved do not exist.",this);if(t===e&&n=n&&this.targetPosition.path[t]t._clone(!0))),e=new bc(this.position,t,this.baseVersion);return e.shouldReceiveAttributes=this.shouldReceiveAttributes,e}getReversed(){const t=this.position.root.document.graveyard,e=new Ks(t,[0]);return new pc(this.position,this.nodes.maxOffset,e,this.baseVersion+1)}_validate(){const t=this.position.parent;if(!t||t.maxOffsett._clone(!0))),sc(this.position,t)}toJSON(){const t=super.toJSON();return t.position=this.position.toJSON(),t.nodes=this.nodes.toJSON(),t}static get className(){return"InsertOperation"}static fromJSON(t,e){const n=[];for(const e of t.nodes)e.name?n.push(Ys.fromJSON(e)):n.push(Hs.fromJSON(e));const i=new bc(Ks.fromJSON(t.position,e),n,t.baseVersion);return i.shouldReceiveAttributes=t.shouldReceiveAttributes,i}}class wc extends oc{constructor(t,e,n,i,o,r){super(r),this.name=t,this.oldRange=e?e.clone():null,this.newRange=n?n.clone():null,this.affectsData=o,this._markers=i}get type(){return"marker"}clone(){return new wc(this.name,this.oldRange,this.newRange,this._markers,this.affectsData,this.baseVersion)}getReversed(){return new wc(this.name,this.newRange,this.oldRange,this._markers,this.affectsData,this.baseVersion+1)}_execute(){const t=this.newRange?"_set":"_remove";this._markers[t](this.name,this.newRange,!0,this.affectsData)}toJSON(){const t=super.toJSON();return this.oldRange&&(t.oldRange=this.oldRange.toJSON()),this.newRange&&(t.newRange=this.newRange.toJSON()),delete t._markers,t}static get className(){return"MarkerOperation"}static fromJSON(t,e){return new wc(t.name,t.oldRange?Js.fromJSON(t.oldRange,e):null,t.newRange?Js.fromJSON(t.newRange,e):null,e.model.markers,t.affectsData,t.baseVersion)}}class kc extends oc{constructor(t,e,n,i){super(i),this.position=t,this.position.stickiness="toNext",this.oldName=e,this.newName=n}get type(){return"rename"}clone(){return new kc(this.position.clone(),this.oldName,this.newName,this.baseVersion)}getReversed(){return new kc(this.position.clone(),this.newName,this.oldName,this.baseVersion+1)}_validate(){const t=this.position.nodeAfter;if(!(t instanceof Ys))throw new Qn.b("rename-operation-wrong-position: Given position is invalid or node after it is not an instance of Element.",this);if(t.name!==this.oldName)throw new Qn.b("rename-operation-wrong-name: Element to change has different name than operation's old name.",this)}_execute(){this.position.nodeAfter.name=this.newName}toJSON(){const t=super.toJSON();return t.position=this.position.toJSON(),t}static get className(){return"RenameOperation"}static fromJSON(t,e){return new kc(Ks.fromJSON(t.position,e),t.oldName,t.newName,t.baseVersion)}}class _c extends oc{constructor(t,e,n,i,o){super(o),this.root=t,this.key=e,this.oldValue=n,this.newValue=i}get type(){return null===this.oldValue?"addRootAttribute":null===this.newValue?"removeRootAttribute":"changeRootAttribute"}clone(){return new _c(this.root,this.key,this.oldValue,this.newValue,this.baseVersion)}getReversed(){return new _c(this.root,this.key,this.newValue,this.oldValue,this.baseVersion+1)}_validate(){if(this.root!=this.root.root||this.root.is("documentFragment"))throw new Qn.b("rootattribute-operation-not-a-root: The element to change is not a root element.",this,{root:this.root,key:this.key});if(null!==this.oldValue&&this.root.getAttribute(this.key)!==this.oldValue)throw new Qn.b("rootattribute-operation-wrong-old-value: Changed node has different attribute value than operation's old attribute value.",this,{root:this.root,key:this.key});if(null===this.oldValue&&null!==this.newValue&&this.root.hasAttribute(this.key))throw new Qn.b("rootattribute-operation-attribute-exists: The attribute with given key already exists.",this,{root:this.root,key:this.key})}_execute(){null!==this.newValue?this.root._setAttribute(this.key,this.newValue):this.root._removeAttribute(this.key)}toJSON(){const t=super.toJSON();return t.root=this.root.toJSON(),t}static get className(){return"RootAttributeOperation"}static fromJSON(t,e){if(!e.getRoot(t.root))throw new Qn.b("rootattribute-operation-fromjson-no-root: Cannot create RootAttributeOperation. Root with specified name does not exist.",this,{rootName:t.root});return new _c(e.getRoot(t.root),t.key,t.oldValue,t.newValue,t.baseVersion)}}class vc extends oc{constructor(t,e,n,i,o){super(o),this.sourcePosition=t.clone(),this.sourcePosition.stickiness="toPrevious",this.howMany=e,this.targetPosition=n.clone(),this.targetPosition.stickiness="toNext",this.graveyardPosition=i.clone()}get type(){return"merge"}get deletionPosition(){return new Ks(this.sourcePosition.root,this.sourcePosition.path.slice(0,-1))}get movedRange(){const t=this.sourcePosition.getShiftedBy(Number.POSITIVE_INFINITY);return new Js(this.sourcePosition,t)}clone(){return new this.constructor(this.sourcePosition,this.howMany,this.targetPosition,this.graveyardPosition,this.baseVersion)}getReversed(){const t=this.targetPosition._getTransformedByMergeOperation(this),e=this.sourcePosition.path.slice(0,-1),n=new Ks(this.sourcePosition.root,e)._getTransformedByMergeOperation(this),i=new yc(t,this.howMany,this.graveyardPosition,this.baseVersion+1);return i.insertionPosition=n,i}_validate(){const t=this.sourcePosition.parent,e=this.targetPosition.parent;if(!t.parent)throw new Qn.b("merge-operation-source-position-invalid: Merge source position is invalid.",this);if(!e.parent)throw new Qn.b("merge-operation-target-position-invalid: Merge target position is invalid.",this);if(this.howMany!=t.maxOffset)throw new Qn.b("merge-operation-how-many-invalid: Merge operation specifies wrong number of nodes to move.",this)}_execute(){const t=this.sourcePosition.parent;cc(Js._createIn(t),this.targetPosition),cc(Js._createOn(t),this.graveyardPosition)}toJSON(){const t=super.toJSON();return t.sourcePosition=t.sourcePosition.toJSON(),t.targetPosition=t.targetPosition.toJSON(),t.graveyardPosition=t.graveyardPosition.toJSON(),t}static get className(){return"MergeOperation"}static fromJSON(t,e){const n=Ks.fromJSON(t.sourcePosition,e),i=Ks.fromJSON(t.targetPosition,e),o=Ks.fromJSON(t.graveyardPosition,e);return new this(n,t.howMany,i,o,t.baseVersion)}}class yc extends oc{constructor(t,e,n,i){super(i),this.splitPosition=t.clone(),this.splitPosition.stickiness="toNext",this.howMany=e,this.insertionPosition=yc.getInsertionPosition(t),this.insertionPosition.stickiness="toNone",this.graveyardPosition=n?n.clone():null,this.graveyardPosition&&(this.graveyardPosition.stickiness="toNext")}get type(){return"split"}get moveTargetPosition(){const t=this.insertionPosition.path.slice();return t.push(0),new Ks(this.insertionPosition.root,t)}get movedRange(){const t=this.splitPosition.getShiftedBy(Number.POSITIVE_INFINITY);return new Js(this.splitPosition,t)}clone(){const t=new this.constructor(this.splitPosition,this.howMany,this.graveyardPosition,this.baseVersion);return t.insertionPosition=this.insertionPosition,t}getReversed(){const t=this.splitPosition.root.document.graveyard,e=new Ks(t,[0]);return new vc(this.moveTargetPosition,this.howMany,this.splitPosition,e,this.baseVersion+1)}_validate(){const t=this.splitPosition.parent,e=this.splitPosition.offset;if(!t||t.maxOffset{for(const e of t.getAttributeKeys())this.removeAttribute(e,t)};if(t instanceof Js)for(const n of t.getItems())e(n);else e(t)}move(t,e,n){if(this._assertWriterUsedCorrectly(),!(t instanceof Js))throw new Qn.b("writer-move-invalid-range: Invalid range to move.",this);if(!t.isFlat)throw new Qn.b("writer-move-range-not-flat: Range to move is not flat.",this);const i=Ks._createAt(e,n);if(i.isEqual(t.start))return;if(this._addOperationForAffectedMarkers("move",t),!Mc(t.root,i.root))throw new Qn.b("writer-move-different-document: Range is going to be moved between different documents.",this);const o=t.root.document?t.root.document.version:null,r=new pc(t.start,t.end.offset-t.start.offset,i,o);this.batch.addOperation(r),this.model.applyOperation(r)}remove(t){this._assertWriterUsedCorrectly();const e=(t instanceof Js?t:Js._createOn(t)).getMinimalFlatRanges().reverse();for(const t of e)this._addOperationForAffectedMarkers("move",t),Sc(t.start,t.end.offset-t.start.offset,this.batch,this.model)}merge(t){this._assertWriterUsedCorrectly();const e=t.nodeBefore,n=t.nodeAfter;if(this._addOperationForAffectedMarkers("merge",t),!(e instanceof Ys))throw new Qn.b("writer-merge-no-element-before: Node before merge position must be an element.",this);if(!(n instanceof Ys))throw new Qn.b("writer-merge-no-element-after: Node after merge position must be an element.",this);t.root.document?this._merge(t):this._mergeDetached(t)}createPositionFromPath(t,e,n){return this.model.createPositionFromPath(t,e,n)}createPositionAt(t,e){return this.model.createPositionAt(t,e)}createPositionAfter(t){return this.model.createPositionAfter(t)}createPositionBefore(t){return this.model.createPositionBefore(t)}createRange(t,e){return this.model.createRange(t,e)}createRangeIn(t){return this.model.createRangeIn(t)}createRangeOn(t){return this.model.createRangeOn(t)}createSelection(t,e,n){return this.model.createSelection(t,e,n)}_mergeDetached(t){const e=t.nodeBefore,n=t.nodeAfter;this.move(Js._createIn(n),Ks._createAt(e,"end")),this.remove(n)}_merge(t){const e=Ks._createAt(t.nodeBefore,"end"),n=Ks._createAt(t.nodeAfter,0),i=t.root.document.graveyard,o=new Ks(i,[0]),r=t.root.document.version,s=new vc(n,t.nodeAfter.maxOffset,e,o,r);this.batch.addOperation(s),this.model.applyOperation(s)}rename(t,e){if(this._assertWriterUsedCorrectly(),!(t instanceof Ys))throw new Qn.b("writer-rename-not-element-instance: Trying to rename an object which is not an instance of Element.",this);const n=t.root.document?t.root.document.version:null,i=new kc(Ks._createBefore(t),t.name,e,n);this.batch.addOperation(i),this.model.applyOperation(i)}split(t,e){this._assertWriterUsedCorrectly();let n,i,o=t.parent;if(!o.parent)throw new Qn.b("writer-split-element-no-parent: Element with no parent can not be split.",this);if(e||(e=o.parent),!t.parent.getAncestors({includeSelf:!0}).includes(e))throw new Qn.b("writer-split-invalid-limit-element: Limit element is not a position ancestor.",this);do{const e=o.root.document?o.root.document.version:null,r=o.maxOffset-t.offset,s=new yc(t,r,null,e);this.batch.addOperation(s),this.model.applyOperation(s),n||i||(n=o,i=t.parent.nextSibling),o=(t=this.createPositionAfter(t.parent)).parent}while(o!==e);return{position:t,range:new Js(Ks._createAt(n,"end"),Ks._createAt(i,0))}}wrap(t,e){if(this._assertWriterUsedCorrectly(),!t.isFlat)throw new Qn.b("writer-wrap-range-not-flat: Range to wrap is not flat.",this);const n=e instanceof Ys?e:new Ys(e);if(n.childCount>0)throw new Qn.b("writer-wrap-element-not-empty: Element to wrap with is not empty.",this);if(null!==n.parent)throw new Qn.b("writer-wrap-element-attached: Element to wrap with is already attached to tree model.",this);this.insert(n,t.start);const i=new Js(t.start.getShiftedBy(1),t.end.getShiftedBy(1));this.move(i,Ks._createAt(n,0))}unwrap(t){if(this._assertWriterUsedCorrectly(),null===t.parent)throw new Qn.b("writer-unwrap-element-no-parent: Trying to unwrap an element which has no parent.",this);this.move(Js._createIn(t),this.createPositionAfter(t)),this.remove(t)}addMarker(t,e){if(this._assertWriterUsedCorrectly(),!e||"boolean"!=typeof e.usingOperation)throw new Qn.b("writer-addMarker-no-usingOperation: The options.usingOperation parameter is required when adding a new marker.",this);const n=e.usingOperation,i=e.range,o=void 0!==e.affectsData&&e.affectsData;if(this.model.markers.has(t))throw new Qn.b("writer-addMarker-marker-exists: Marker with provided name already exists.",this);if(!i)throw new Qn.b("writer-addMarker-no-range: Range parameter is required when adding a new marker.",this);return n?(Pc(this,t,null,i,o),this.model.markers.get(t)):this.model.markers._set(t,i,n,o)}updateMarker(t,e){this._assertWriterUsedCorrectly();const n="string"==typeof t?t:t.name,i=this.model.markers.get(n);if(!i)throw new Qn.b("writer-updateMarker-marker-not-exists: Marker with provided name does not exists.",this);if(!e)return void this.model.markers._refresh(i);const o="boolean"==typeof e.usingOperation,r="boolean"==typeof e.affectsData,s=r?e.affectsData:i.affectsData;if(!o&&!e.range&&!r)throw new Qn.b("writer-updateMarker-wrong-options: One of the options is required - provide range, usingOperations or affectsData.",this);const a=i.getRange(),c=e.range?e.range:a;o&&e.usingOperation!==i.managedUsingOperations?e.usingOperation?Pc(this,n,null,c,s):(Pc(this,n,a,null,s),this.model.markers._set(n,c,void 0,s)):i.managedUsingOperations?Pc(this,n,a,c,s):this.model.markers._set(n,c,void 0,s)}removeMarker(t){this._assertWriterUsedCorrectly();const e="string"==typeof t?t:t.name;if(!this.model.markers.has(e))throw new Qn.b("writer-removeMarker-no-marker: Trying to remove marker which does not exist.",this);const n=this.model.markers.get(e);n.managedUsingOperations?Pc(this,e,n.getRange(),null,n.affectsData):this.model.markers._remove(e)}setSelection(t,e,n){this._assertWriterUsedCorrectly(),this.model.document.selection._setTo(t,e,n)}setSelectionFocus(t,e){this._assertWriterUsedCorrectly(),this.model.document.selection._setFocus(t,e)}setSelectionAttribute(t,e){if(this._assertWriterUsedCorrectly(),"string"==typeof t)this._setSelectionAttribute(t,e);else for(const[e,n]of Fs(t))this._setSelectionAttribute(e,n)}removeSelectionAttribute(t){if(this._assertWriterUsedCorrectly(),"string"==typeof t)this._removeSelectionAttribute(t);else for(const e of t)this._removeSelectionAttribute(e)}overrideSelectionGravity(){return this.model.document.selection._overrideGravity()}restoreSelectionGravity(t){this.model.document.selection._restoreGravity(t)}_setSelectionAttribute(t,e){const n=this.model.document.selection;if(n.isCollapsed&&n.anchor.parent.isEmpty){const i=ua._getStoreAttributeKey(t);this.setAttribute(i,e,n.anchor.parent)}n._setAttribute(t,e)}_removeSelectionAttribute(t){const e=this.model.document.selection;if(e.isCollapsed&&e.anchor.parent.isEmpty){const n=ua._getStoreAttributeKey(t);this.removeAttribute(n,e.anchor.parent)}e._removeAttribute(t)}_assertWriterUsedCorrectly(){if(this.model._currentWriter!==this)throw new Qn.b("writer-incorrect-use: Trying to use a writer outside the change() block.",this)}_addOperationForAffectedMarkers(t,e){for(const n of this.model.markers){if(!n.managedUsingOperations)continue;const i=n.getRange();let o=!1;if("move"==t)o=e.containsPosition(i.start)||e.start.isEqual(i.start)||e.containsPosition(i.end)||e.end.isEqual(i.end);else{const t=e.nodeBefore,n=e.nodeAfter,r=i.start.parent==t&&i.start.isAtEnd,s=i.end.parent==n&&0==i.end.offset,a=i.end.nodeAfter==n,c=i.start.nodeAfter==n;o=r||s||a||c}o&&this.updateMarker(n.name,{range:i})}}}function Tc(t,e,n,i){const o=t.model,r=o.document;let s,a,c,l=i.start;for(const t of i.getWalker({shallow:!0}))c=t.item.getAttribute(e),s&&a!=c&&(a!=n&&d(),l=s),s=t.nextPosition,a=c;function d(){const i=new Js(l,s),c=i.root.document?r.version:null,d=new gc(i,e,a,n,c);t.batch.addOperation(d),o.applyOperation(d)}s instanceof Ks&&s!=l&&a!=n&&d()}function Cc(t,e,n,i){const o=t.model,r=o.document,s=i.getAttribute(e);let a,c;if(s!=n){if(i.root===i){const t=i.document?r.version:null;c=new _c(i,e,s,n,t)}else{const o=(a=new Js(Ks._createBefore(i),t.createPositionAfter(i))).root.document?r.version:null;c=new gc(a,e,s,n,o)}t.batch.addOperation(c),o.applyOperation(c)}}function Pc(t,e,n,i,o){const r=t.model,s=r.document,a=new wc(e,n,i,r.markers,o,s.version);t.batch.addOperation(a),r.applyOperation(a)}function Sc(t,e,n,i){let o;if(t.root.document){const n=i.document,r=new Ks(n.graveyard,[0]);o=new pc(t,e,r,n.version)}else o=new mc(t,e);n.addOperation(o),i.applyOperation(o)}function Mc(t,e){return t===e||t instanceof xc&&e instanceof xc}class Ec{constructor(t){this._markerCollection=t,this._changesInElement=new Map,this._elementSnapshots=new Map,this._changedMarkers=new Map,this._changeCount=0,this._cachedChanges=null,this._cachedChangesWithGraveyard=null}get isEmpty(){return 0==this._changesInElement.size&&0==this._changedMarkers.size}refreshItem(t){if(this._isInInsertedElement(t.parent))return;this._markRemove(t.parent,t.startOffset,t.offsetSize),this._markInsert(t.parent,t.startOffset,t.offsetSize);const e=Js._createOn(t);for(const t of this._markerCollection.getMarkersIntersectingRange(e)){const e=t.getRange();this.bufferMarkerChange(t.name,e,e,t.affectsData)}this._cachedChanges=null}bufferOperation(t){switch(t.type){case"insert":if(this._isInInsertedElement(t.position.parent))return;this._markInsert(t.position.parent,t.position.offset,t.nodes.maxOffset);break;case"addAttribute":case"removeAttribute":case"changeAttribute":for(const e of t.range.getItems({shallow:!0}))this._isInInsertedElement(e.parent)||this._markAttribute(e);break;case"remove":case"move":case"reinsert":{if(t.sourcePosition.isEqual(t.targetPosition)||t.sourcePosition.getShiftedBy(t.howMany).isEqual(t.targetPosition))return;const e=this._isInInsertedElement(t.sourcePosition.parent),n=this._isInInsertedElement(t.targetPosition.parent);e||this._markRemove(t.sourcePosition.parent,t.sourcePosition.offset,t.howMany),n||this._markInsert(t.targetPosition.parent,t.getMovedRangeStart().offset,t.howMany);break}case"rename":{if(this._isInInsertedElement(t.position.parent))return;this._markRemove(t.position.parent,t.position.offset,1),this._markInsert(t.position.parent,t.position.offset,1);const e=Js._createFromPositionAndShift(t.position,1);for(const t of this._markerCollection.getMarkersIntersectingRange(e)){const e=t.getRange();this.bufferMarkerChange(t.name,e,e,t.affectsData)}break}case"split":{const e=t.splitPosition.parent;this._isInInsertedElement(e)||this._markRemove(e,t.splitPosition.offset,t.howMany),this._isInInsertedElement(t.insertionPosition.parent)||this._markInsert(t.insertionPosition.parent,t.insertionPosition.offset,1),t.graveyardPosition&&this._markRemove(t.graveyardPosition.parent,t.graveyardPosition.offset,1);break}case"merge":{const e=t.sourcePosition.parent;this._isInInsertedElement(e.parent)||this._markRemove(e.parent,e.startOffset,1);const n=t.graveyardPosition.parent;this._markInsert(n,t.graveyardPosition.offset,1);const i=t.targetPosition.parent;this._isInInsertedElement(i)||this._markInsert(i,t.targetPosition.offset,e.maxOffset);break}}this._cachedChanges=null}bufferMarkerChange(t,e,n,i){const o=this._changedMarkers.get(t);o?(o.newRange=n,o.affectsData=i,null==o.oldRange&&null==o.newRange&&this._changedMarkers.delete(t)):this._changedMarkers.set(t,{oldRange:e,newRange:n,affectsData:i})}getMarkersToRemove(){const t=[];for(const[e,n]of this._changedMarkers)null!=n.oldRange&&t.push({name:e,range:n.oldRange});return t}getMarkersToAdd(){const t=[];for(const[e,n]of this._changedMarkers)null!=n.newRange&&t.push({name:e,range:n.newRange});return t}getChangedMarkers(){return Array.from(this._changedMarkers).map(t=>({name:t[0],data:{oldRange:t[1].oldRange,newRange:t[1].newRange}}))}hasDataChanges(){for(const[,t]of this._changedMarkers)if(t.affectsData)return!0;return this._changesInElement.size>0}getChanges(t={includeChangesInGraveyard:!1}){if(this._cachedChanges)return t.includeChangesInGraveyard?this._cachedChangesWithGraveyard.slice():this._cachedChanges.slice();const e=[];for(const t of this._changesInElement.keys()){const n=this._changesInElement.get(t).sort((t,e)=>t.offset===e.offset?t.type!=e.type?"remove"==t.type?-1:1:0:t.offsett.position.root!=e.position.root?t.position.root.rootNamen.offset){if(i>o){const t={type:"attribute",offset:o,howMany:i-o,count:this._changeCount++};this._handleChange(t,e),e.push(t)}t.nodesToHandle=n.offset-t.offset,t.howMany=t.nodesToHandle}else t.offset>=n.offset&&t.offseto?(t.nodesToHandle=i-o,t.offset=o):t.nodesToHandle=0);if("remove"==n.type&&t.offsetn.offset){const o={type:"attribute",offset:n.offset,howMany:i-n.offset,count:this._changeCount++};this._handleChange(o,e),e.push(o),t.nodesToHandle=n.offset-t.offset,t.howMany=t.nodesToHandle}"attribute"==n.type&&(t.offset>=n.offset&&i<=o?(t.nodesToHandle=0,t.howMany=0,t.offset=0):t.offset<=n.offset&&i>=o&&(n.howMany=0))}}t.howMany=t.nodesToHandle,delete t.nodesToHandle}_getInsertDiff(t,e,n){return{type:"insert",position:Ks._createAt(t,e),name:n,length:1,changeCount:this._changeCount++}}_getRemoveDiff(t,e,n){return{type:"remove",position:Ks._createAt(t,e),name:n,length:1,changeCount:this._changeCount++}}_getAttributesDiff(t,e,n){const i=[];n=new Map(n);for(const[o,r]of e){const e=n.has(o)?n.get(o):null;e!==r&&i.push({type:"attribute",position:t.start,range:t.clone(),length:1,attributeKey:o,attributeOldValue:r,attributeNewValue:e,changeCount:this._changeCount++}),n.delete(o)}for(const[e,o]of n)i.push({type:"attribute",position:t.start,range:t.clone(),length:1,attributeKey:e,attributeOldValue:null,attributeNewValue:o,changeCount:this._changeCount++});return i}_isInInsertedElement(t){const e=t.parent;if(!e)return!1;const n=this._changesInElement.get(e),i=t.startOffset;if(n)for(const t of n)if("insert"==t.type&&i>=t.offset&&ii){for(let e=0;e{const n=e[0];if(n.isDocumentOperation&&n.baseVersion!==this.version)throw new Qn.b("model-document-applyOperation-wrong-version: Only operations with matching versions can be applied.",this,{operation:n})},{priority:"highest"}),this.listenTo(t,"applyOperation",(t,e)=>{const n=e[0];n.isDocumentOperation&&this.differ.bufferOperation(n)},{priority:"high"}),this.listenTo(t,"applyOperation",(t,e)=>{const n=e[0];n.isDocumentOperation&&(this.version++,this.history.addOperation(n))},{priority:"low"}),this.listenTo(this.selection,"change",()=>{this._hasSelectionChangedFromTheLastChangeBlock=!0}),this.listenTo(t.markers,"update",(t,e,n,i)=>{this.differ.bufferMarkerChange(e.name,n,i,e.affectsData),null===n&&e.on("change",(t,n)=>{this.differ.bufferMarkerChange(e.name,n,e.getRange(),e.affectsData)})})}get graveyard(){return this.getRoot(jc)}createRoot(t="$root",e="main"){if(this.roots.get(e))throw new Qn.b("model-document-createRoot-name-exists: Root with specified name already exists.",this,{name:e});const n=new xc(this,t,e);return this.roots.add(n),n}destroy(){this.selection.destroy(),this.stopListening()}getRoot(t="main"){return this.roots.get(t)}getRootNames(){return Array.from(this.roots,t=>t.rootName).filter(t=>t!=jc)}registerPostFixer(t){this._postFixers.add(t)}toJSON(){const t=ui(this);return t.selection="[engine.model.DocumentSelection]",t.model="[engine.model.Model]",t}_handleChangeBlock(t){this._hasDocumentChangedFromTheLastChangeBlock()&&(this._callPostFixers(t),this.selection.refresh(),this.differ.hasDataChanges()?this.fire("change:data",t.batch):this.fire("change",t.batch),this.selection.refresh(),this.differ.reset()),this._hasSelectionChangedFromTheLastChangeBlock=!1}_hasDocumentChangedFromTheLastChangeBlock(){return!this.differ.isEmpty||this._hasSelectionChangedFromTheLastChangeBlock}_getDefaultRoot(){for(const t of this.roots)if(t!==this.graveyard)return t;return this.graveyard}_getDefaultRange(){const t=this._getDefaultRoot(),e=this.model,n=e.schema,i=e.createPositionFromPath(t,[0]);return n.getNearestSelectionRange(i)||e.createRange(i)}_validateSelectionRange(t){return zc(t.start)&&zc(t.end)}_callPostFixers(t){let e=!1;do{for(const n of this._postFixers)if(this.selection.refresh(),e=n(t))break}while(e)}}function zc(t){const e=t.textNode;if(e){const n=e.data,i=t.offset-e.startOffset;return!Dc(n,i)&&!Lc(n,i)}return!0}li(Vc,ni);class Bc{constructor(){this._markers=new Map}[Symbol.iterator](){return this._markers.values()}has(t){return this._markers.has(t)}get(t){return this._markers.get(t)||null}_set(t,e,n=!1,i=!1){const o=t instanceof Fc?t.name:t,r=this._markers.get(o);if(r){const t=r.getRange();let s=!1;return t.isEqual(e)||(r._attachLiveRange(ca.fromRange(e)),s=!0),n!=r.managedUsingOperations&&(r._managedUsingOperations=n,s=!0),"boolean"==typeof i&&i!=r.affectsData&&(r._affectsData=i,s=!0),s&&this.fire("update:"+o,r,t,e),r}const s=ca.fromRange(e),a=new Fc(o,s,n,i);return this._markers.set(o,a),this.fire("update:"+o,a,null,e),a}_remove(t){const e=t instanceof Fc?t.name:t,n=this._markers.get(e);return!!n&&(this._markers.delete(e),this.fire("update:"+e,n,n.getRange(),null),this._destroyMarker(n),!0)}_refresh(t){const e=t instanceof Fc?t.name:t,n=this._markers.get(e);if(!n)throw new Qn.b("markercollection-refresh-marker-not-exists: Marker with provided name does not exists.",this);const i=n.getRange();this.fire("update:"+e,n,i,i,n.managedUsingOperations,n.affectsData)}*getMarkersAtPosition(t){for(const e of this)e.getRange().containsPosition(t)&&(yield e)}*getMarkersIntersectingRange(t){for(const e of this)null!==e.getRange().getIntersection(t)&&(yield e)}destroy(){for(const t of this._markers.values())this._destroyMarker(t);this._markers=null,this.stopListening()}*getMarkersGroup(t){for(const e of this._markers.values())e.name.startsWith(t+":")&&(yield e)}_destroyMarker(t){t.stopListening(),t._detachLiveRange()}}li(Bc,ni);class Fc{constructor(t,e,n,i){this.name=t,this._liveRange=this._attachLiveRange(e),this._managedUsingOperations=n,this._affectsData=i}get managedUsingOperations(){if(!this._liveRange)throw new Qn.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._managedUsingOperations}get affectsData(){if(!this._liveRange)throw new Qn.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._affectsData}getStart(){if(!this._liveRange)throw new Qn.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.start.clone()}getEnd(){if(!this._liveRange)throw new Qn.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.end.clone()}getRange(){if(!this._liveRange)throw new Qn.b("marker-destroyed: Cannot use a destroyed marker instance.",this);return this._liveRange.toRange()}is(t){return"marker"==t||"model:marker"==t}_attachLiveRange(t){return this._liveRange&&this._detachLiveRange(),t.delegate("change:range").to(this),t.delegate("change:content").to(this),this._liveRange=t,t}_detachLiveRange(){this._liveRange.stopDelegating("change:range",this),this._liveRange.stopDelegating("change:content",this),this._liveRange.detach(),this._liveRange=null}}li(Fc,ni);class Uc extends Ks{constructor(t,e,n="toNone"){if(super(t,e,n),!this.root.is("rootElement"))throw new Qn.b("model-liveposition-root-not-rootelement: LivePosition's root has to be an instance of RootElement.",t);Hc.call(this)}detach(){this.stopListening()}is(t){return"livePosition"==t||"model:livePosition"==t||super.is(t)}toPosition(){return new Ks(this.root,this.path.slice(),this.stickiness)}static fromPosition(t,e){return new this(t.root,t.path.slice(),e||t.stickiness)}}function Hc(){this.listenTo(this.root.document.model,"applyOperation",(t,e)=>{const n=e[0];n.isDocumentOperation&&qc.call(this,n)},{priority:"low"})}function qc(t){const e=this.getTransformedByOperation(t);if(!this.isEqual(e)){const t=this.toPosition();this.path=e.path,this.root=e.root,this.fire("change",t)}}li(Uc,ni);class Wc{constructor(t,e,n){this.model=t,this.writer=e,this.position=n,this.canMergeWith=new Set([this.position.parent]),this.schema=t.schema,this._filterAttributesOf=[],this._affectedStart=null,this._affectedEnd=null}handleNodes(t,e){t=Array.from(t);for(let n=0;n{if(!n.doNotResetEntireContent&&function(t,e){const n=t.getLimitElement(e);if(!e.containsEntireContent(n))return!1;const i=e.getFirstRange();if(i.start.parent==i.end.parent)return!1;return t.checkChild(n,"paragraph")}(o,e))return void function(t,e){const n=t.model.schema.getLimitElement(e);t.remove(t.createRangeIn(n)),$c(t,t.createPositionAt(n,0),e)}(t,e);const r=i.start,s=Uc.fromPosition(i.end,"toNext");if(i.start.isTouching(i.end)||t.remove(i),n.leaveUnmerged||(!function t(e,n,i){const o=n.parent,r=i.parent;if(o==r)return;if(e.model.schema.isLimit(o)||e.model.schema.isLimit(r))return;if(!function(t,e,n){const i=new Js(t,e);for(const t of i.getWalker())if(n.isLimit(t.item))return!1;return!0}(n,i,e.model.schema))return;n=e.createPositionAfter(o),(i=e.createPositionBefore(r)).isEqual(n)||e.insert(r,n);e.merge(n);for(;i.parent.isEmpty;){const t=i.parent;i=e.createPositionBefore(t),e.remove(t)}t(e,n,i)}(t,r,s),o.removeDisallowedAttributes(r.parent.getChildren(),t)),Gc(t,e,r),function(t,e){const n=t.checkChild(e,"$text"),i=t.checkChild(e,"paragraph");return!n&&i}(o,r)){const i=o.getNearestSelectionRange(r);n.doNotAutoparagraph&&i?Gc(t,e,i):$c(t,r,e)}s.detach()})}function $c(t,e,n){const i=t.createElement("paragraph");t.insert(i,e),Gc(t,n,t.createPositionAt(i,0))}function Gc(t,e,n){e instanceof ua?t.setSelection(n):e.setTo(n)}const Qc=' ,.?!:;"-()';function Kc(t,e){if("text"==e.type)return"word"===t.unit?function(t,e){let n=t.position.textNode;if(n){let i=t.position.offset-n.startOffset;for(;!Zc(n.data,i,e)&&!Xc(n,i,e);){t.next();const o=e?t.position.nodeAfter:t.position.nodeBefore;if(o&&o.is("text")){const i=o.data.charAt(e?0:o.data.length-1);Qc.includes(i)||(t.next(),n=t.position.textNode)}i=t.position.offset-n.startOffset}}return t.position}(t.walker,t.isForward):function(t,e){const n=t.position.textNode;if(n){const i=n.data;let o=t.position.offset-n.startOffset;for(;Dc(i,o)||"character"==e&&Lc(i,o);)t.next(),o=t.position.offset-n.startOffset}return t.position}(t.walker,t.unit,t.isForward);if(e.type==(t.isForward?"elementStart":"elementEnd")){if(t.schema.isObject(e.item))return Ks._createAt(e.item,t.isForward?"after":"before");if(t.schema.checkChild(e.nextPosition,"$text"))return e.nextPosition}else{if(t.schema.isLimit(e.item))return void t.walker.skip(()=>!0);if(t.schema.checkChild(e.nextPosition,"$text"))return e.nextPosition}}function Jc(t,e){const n=t.root,i=Ks._createAt(n,e?"end":0);return e?new Js(t,i):new Js(i,t)}function Zc(t,e,n){const i=e+(n?0:-1);return Qc.includes(t.charAt(i))}function Xc(t,e,n){return e===(n?t.endOffset:0)}function tl(t,e){const n=[];Array.from(t.getItems({direction:"backward"})).map(t=>e.createRangeOn(t)).filter(e=>{return(e.start.isAfter(t.start)||e.start.isEqual(t.start))&&(e.end.isBefore(t.end)||e.end.isEqual(t.end))}).forEach(t=>{n.push(t.start.parent),e.remove(t)}),n.forEach(t=>{let n=t;for(;n.parent&&n.isEmpty;){const t=e.createRangeOn(n);n=n.parent,e.remove(t)}})}function el(t){t.document.registerPostFixer(e=>(function(t,e){const n=e.document.selection,i=e.schema,o=[];let r=!1;for(const t of n.getRanges()){const e=nl(t,i);e?(o.push(e),r=!0):o.push(t)}if(r){let e=o;if(o.length>1){const t=o[0].start,n=o[o.length-1].end;e=[new Js(t,n)]}t.setSelection(e,{backward:n.isBackward})}})(e,t))}function nl(t,e){return t.isCollapsed?function(t,e){const n=t.start,i=e.getNearestSelectionRange(n);if(!i)return null;const o=i.start;if(n.isEqual(o))return null;if(o.nodeAfter&&e.isLimit(o.nodeAfter))return new Js(o,Ks._createAfter(o.nodeAfter));return new Js(o)}(t,e):function(t,e){const n=t.start,i=t.end,o=e.checkChild(n,"$text"),r=e.checkChild(i,"$text"),s=e.getLimitElement(n),a=e.getLimitElement(i);if(s===a){if(o&&r)return null;if(function(t,e,n){const i=t.nodeAfter&&!n.isLimit(t.nodeAfter)||n.checkChild(t,"$text"),o=e.nodeBefore&&!n.isLimit(e.nodeBefore)||n.checkChild(e,"$text");return i||o}(n,i,e)){const t=n.nodeAfter&&e.isObject(n.nodeAfter)?null:e.getNearestSelectionRange(n,"forward"),o=i.nodeBefore&&e.isObject(i.nodeBefore)?null:e.getNearestSelectionRange(i,"backward"),r=t?t.start:n,s=o?o.start:i;return new Js(r,s)}}const c=s&&!s.is("rootElement"),l=a&&!a.is("rootElement");if(c||l){const t=n.nodeAfter&&i.nodeBefore&&n.nodeAfter.parent===i.nodeBefore.parent,o=c&&(!t||!ol(n.nodeAfter,e)),r=l&&(!t||!ol(i.nodeBefore,e));let d=n,h=i;return o&&(d=Ks._createBefore(il(s,e))),r&&(h=Ks._createAfter(il(a,e))),new Js(d,h)}return null}(t,e)}function il(t,e){let n=t,i=n;for(;e.isLimit(i)&&i.parent;)n=i,i=i.parent;return n}function ol(t,e){return t&&e.isObject(t)}class rl{constructor(){this.markers=new Bc,this.document=new Vc(this),this.schema=new za,this._pendingChanges=[],this._currentWriter=null,["insertContent","deleteContent","modifySelection","getSelectedContent","applyOperation"].forEach(t=>this.decorate(t)),this.on("applyOperation",(t,e)=>{e[0]._validate()},{priority:"highest"}),this.schema.register("$root",{isLimit:!0}),this.schema.register("$block",{allowIn:"$root",isBlock:!0}),this.schema.register("$text",{allowIn:"$block",isInline:!0}),this.schema.register("$clipboardHolder",{allowContentOf:"$root",isLimit:!0}),this.schema.extend("$text",{allowIn:"$clipboardHolder"}),this.schema.register("$marker"),this.schema.addChildCheck((t,e)=>{if("$marker"===e.name)return!0}),el(this)}change(t){try{return 0===this._pendingChanges.length?(this._pendingChanges.push({batch:new ic,callback:t}),this._runPendingChanges()[0]):t(this._currentWriter)}catch(t){Qn.b.rethrowUnexpectedError(t,this)}}enqueueChange(t,e){try{"string"==typeof t?t=new ic(t):"function"==typeof t&&(e=t,t=new ic),this._pendingChanges.push({batch:t,callback:e}),1==this._pendingChanges.length&&this._runPendingChanges()}catch(t){Qn.b.rethrowUnexpectedError(t,this)}}applyOperation(t){t._execute()}insertContent(t,e,n){return function(t,e,n,i){return t.change(o=>{let r;const s=(r=n?n instanceof ia||n instanceof ua?n:o.createSelection(n,i):t.document.selection).getFirstPosition();r.isCollapsed||t.deleteContent(r,{doNotAutoparagraph:!0});const a=new Wc(t,o,s);let c;c=e.is("documentFragment")?e.getChildren():[e],a.handleNodes(c,{isFirst:!0,isLast:!0});const l=a.getSelectionRange();l&&(r instanceof ua?o.setSelection(l):r.setTo(l));const d=a.getAffectedRange()||t.createRange(s);return a.destroy(),d})}(this,t,e,n)}deleteContent(t,e){Yc(this,t,e)}modifySelection(t,e){!function(t,e,n={}){const i=t.schema,o="backward"!=n.direction,r=n.unit?n.unit:"character",s=e.focus,a=new $s({boundaries:Jc(s,o),singleCharacters:!0,direction:o?"forward":"backward"}),c={walker:a,schema:i,isForward:o,unit:r};let l;for(;l=a.next();){if(l.done)return;const n=Kc(c,l.value);if(n)return void(e instanceof ua?t.change(t=>{t.setSelectionFocus(n)}):e.setFocus(n))}}(this,t,e)}getSelectedContent(t){return function(t,e){return t.change(t=>{const n=t.createDocumentFragment(),i=e.getFirstRange();if(!i||i.isCollapsed)return n;const o=i.start.root,r=i.start.getCommonPath(i.end),s=o.getNodeByPath(r);let a;const c=(a=i.start.parent==i.end.parent?i:t.createRange(t.createPositionAt(s,i.start.path[r.length]),t.createPositionAt(s,i.end.path[r.length]+1))).end.offset-a.start.offset;for(const e of a.getItems({shallow:!0}))e.is("textProxy")?t.appendText(e.data,e.getAttributes(),n):t.append(e._clone(!0),n);if(a!=i){const e=i._getTransformedByMove(a.start,t.createPositionAt(n,0),c)[0],o=t.createRange(t.createPositionAt(n,0),e.start);tl(t.createRange(e.end,t.createPositionAt(n,"end")),t),tl(o,t)}return n})}(this,t)}hasContent(t,e){const n=t instanceof Ys?Js._createIn(t):t;if(n.isCollapsed)return!1;for(const t of this.markers.getMarkersIntersectingRange(n))if(t.affectsData)return!0;const{ignoreWhitespaces:i=!1}=e||{};for(const t of n.getItems())if(t.is("textProxy")){if(!i)return!0;if(-1!==t.data.search(/\S/))return!0}else if(this.schema.isObject(t))return!0;return!1}createPositionFromPath(t,e,n){return new Ks(t,e,n)}createPositionAt(t,e){return Ks._createAt(t,e)}createPositionAfter(t){return Ks._createAfter(t)}createPositionBefore(t){return Ks._createBefore(t)}createRange(t,e){return new Js(t,e)}createRangeIn(t){return Js._createIn(t)}createRangeOn(t){return Js._createOn(t)}createSelection(t,e,n){return new ia(t,e,n)}createBatch(t){return new ic(t)}destroy(){this.document.destroy(),this.stopListening()}_runPendingChanges(){const t=[];for(this.fire("_beforeChanges");this._pendingChanges.length;){const e=this._pendingChanges[0].batch;this._currentWriter=new Ac(this,e);const n=this._pendingChanges[0].callback(this._currentWriter);t.push(n),this.document._handleChangeBlock(this._currentWriter),this._pendingChanges.shift(),this._currentWriter=null}return this.fire("_afterChanges"),t}}li(rl,Ui);class sl{constructor(){this._listener=Object.create(ur)}listenTo(t){this._listener.listenTo(t,"keydown",(t,e)=>{this._listener.fire("_keydown:"+ko(e),e)})}set(t,e,n={}){const i=_o(t),o=n.priority;this._listener.listenTo(this._listener,"_keydown:"+i,(t,n)=>{e(n,()=>{n.preventDefault(),n.stopPropagation(),t.stop()}),t.return=!0},{priority:o})}press(t){return!!this._listener.fire("_keydown:"+ko(t),t)}destroy(){this._listener.stopListening()}}class al extends sl{constructor(t){super(),this.editor=t}set(t,e,n={}){if("string"==typeof e){const t=e;e=(e,n)=>{this.editor.execute(t),n()}}super.set(t,e,n)}}class cl{constructor(t){const e=this.constructor.builtinPlugins;this.config=new $n(t,this.constructor.defaultConfig),this.config.define("plugins",e),this.plugins=new Ia(this,e),this.commands=new Na;const n=this.config.get("language")||{};this.locale=new Da({uiLanguage:"string"==typeof n?n:n.ui,contentLanguage:this.config.get("language.content")}),this.t=this.locale.t,this.set("state","initializing"),this.once("ready",()=>this.state="ready",{priority:"high"}),this.once("destroy",()=>this.state="destroyed",{priority:"high"}),this.set("isReadOnly",!1),this.model=new rl,this.data=new Xa(this.model),this.editing=new Ea(this.model),this.editing.view.document.bind("isReadOnly").to(this),this.conversion=new tc([this.editing.downcastDispatcher,this.data.downcastDispatcher],this.data.upcastDispatcher),this.conversion.addAlias("dataDowncast",this.data.downcastDispatcher),this.conversion.addAlias("editingDowncast",this.editing.downcastDispatcher),this.keystrokes=new al(this),this.keystrokes.listenTo(this.editing.view.document)}initPlugins(){const t=this.config,e=t.get("plugins")||[],n=t.get("removePlugins")||[],i=t.get("extraPlugins")||[];return this.plugins.init(e.concat(i),n)}destroy(){let t=Promise.resolve();return"initializing"==this.state&&(t=new Promise(t=>this.once("ready",t))),t.then(()=>{this.fire("destroy"),this.stopListening(),this.commands.destroy()}).then(()=>this.plugins.destroy()).then(()=>{this.model.destroy(),this.data.destroy(),this.editing.destroy(),this.keystrokes.destroy()})}execute(...t){try{this.commands.execute(...t)}catch(t){Qn.b.rethrowUnexpectedError(t,this)}}}li(cl,Ui);var ll={setData(t){this.data.set(t)},getData(t){return this.data.get(t)}};var dl={updateSourceElement(){if(!this.sourceElement)throw new Qn.b("editor-missing-sourceelement: Cannot update the source element of a detached editor.",this);var t,e;t=this.sourceElement,e=this.data.get(),t instanceof HTMLTextAreaElement&&(t.value=e),t.innerHTML=e}};class hl{getHtml(t){const e=document.implementation.createHTMLDocument("").createElement("div");return e.appendChild(t),e.innerHTML}}class ul{constructor(){this._domParser=new DOMParser,this._domConverter=new ar({blockFillerMode:"nbsp"}),this._htmlWriter=new hl}toData(t){const e=this._domConverter.viewToDom(t,document);return this._htmlWriter.getHtml(e)}toView(t){const e=this._toDom(t);return this._domConverter.domToView(e)}_toDom(t){const e=this._domParser.parseFromString(t,"text/html"),n=e.createDocumentFragment(),i=e.body.childNodes;for(;i.length>0;)n.appendChild(i[0]);return n}}class fl{constructor(t){this.editor=t,this._components=new Map}*names(){for(const t of this._components.values())yield t.originalName}add(t,e){if(this.has(t))throw new Qn.b("componentfactory-item-exists: The item already exists in the component factory.",this,{name:t});this._components.set(gl(t),{callback:e,originalName:t})}create(t){if(!this.has(t))throw new Qn.b("componentfactory-item-missing: The required component is not registered in the factory.",this,{name:t});return this._components.get(gl(t)).callback(this.editor.locale)}has(t){return this._components.has(gl(t))}}function gl(t){return String(t).toLowerCase()}class ml{constructor(){this.set("isFocused",!1),this.set("focusedElement",null),this._elements=new Set,this._nextEventLoopTimeout=null}add(t){if(this._elements.has(t))throw new Qn.b("focusTracker-add-element-already-exist",this);this.listenTo(t,"focus",()=>this._focus(t),{useCapture:!0}),this.listenTo(t,"blur",()=>this._blur(),{useCapture:!0}),this._elements.add(t)}remove(t){t===this.focusedElement&&this._blur(t),this._elements.has(t)&&(this.stopListening(t),this._elements.delete(t))}destroy(){this.stopListening()}_focus(t){clearTimeout(this._nextEventLoopTimeout),this.focusedElement=t,this.isFocused=!0}_blur(){clearTimeout(this._nextEventLoopTimeout),this._nextEventLoopTimeout=setTimeout(()=>{this.focusedElement=null,this.isFocused=!1},0)}}li(ml,ur),li(ml,Ui);class pl{constructor(t){this.editor=t,this.componentFactory=new fl(t),this.focusTracker=new ml,this._editableElementsMap=new Map,this.listenTo(t.editing.view.document,"layoutChanged",()=>this.update())}get element(){return null}update(){this.fire("update")}destroy(){this.stopListening(),this.focusTracker.destroy();for(const t of this._editableElementsMap.values())t.ckeditorInstance=null;this._editableElementsMap=new Map}setEditableElement(t,e){this._editableElementsMap.set(t,e),e.ckeditorInstance||(e.ckeditorInstance=this.editor)}getEditableElement(t="main"){return this._editableElementsMap.get(t)}getEditableElementsNames(){return this._editableElementsMap.keys()}get _editableElements(){return console.warn("editor-ui-deprecated-editable-elements: The EditorUI#_editableElements property has been deprecated and will be removed in the near future.",{editorUI:this}),this._editableElementsMap}}li(pl,ni);n(13);const bl=new WeakMap;function wl(t){const{view:e,element:n,text:i,isDirectHost:o=!0}=t,r=e.document;bl.has(r)||(bl.set(r,new Map),r.registerPostFixer(t=>_l(r,t))),bl.get(r).set(n,{text:i,isDirectHost:o}),e.change(t=>_l(r,t))}function kl(t,e){return!!e.hasClass("ck-placeholder")&&(t.removeClass("ck-placeholder",e),!0)}function _l(t,e){const n=bl.get(t);let i=!1;for(const[t,o]of n)vl(e,t,o)&&(i=!0);return i}function vl(t,e,n){const{text:i,isDirectHost:o}=n,r=o?e:function(t){if(1===t.childCount){const e=t.getChild(0);if(e.is("element")&&!e.is("uiElement"))return e}return null}(e);let s=!1;return!!r&&(n.hostElement=r,r.getAttribute("data-placeholder")!==i&&(t.setAttribute("data-placeholder",i,r),s=!0),!function(t){const e=t.document;if(!e)return!1;const n=!Array.from(t.getChildren()).some(t=>!t.is("uiElement"));if(!e.isFocused&&n)return!0;const i=e.selection.anchor;return!(!n||!i||i.parent===t)}(r)?kl(t,r)&&(s=!0):function(t,e){return!e.hasClass("ck-placeholder")&&(t.addClass("ck-placeholder",e),!0)}(t,r)&&(s=!0),s)}class yl{constructor(){this._replacedElements=[]}replace(t,e){this._replacedElements.push({element:t,newElement:e}),t.style.display="none",e&&t.parentNode.insertBefore(e,t.nextSibling)}restore(){this._replacedElements.forEach(({element:t,newElement:e})=>{t.style.display="",e&&e.remove()}),this._replacedElements=[]}}class xl extends pl{constructor(t,e){var n;super(t),this.view=e,this._toolbarConfig=(n=t.config.get("toolbar"),Array.isArray(n)?{items:n}:n?Object.assign({items:[]},n):{items:[]}),this._elementReplacer=new yl}get element(){return this.view.element}init(t){const e=this.editor,n=this.view,i=e.editing.view,o=n.editable,r=i.document.getRoot();o.name=r.rootName,n.render();const s=o.element;this.setEditableElement(o.name,s),this.focusTracker.add(s),n.editable.bind("isFocused").to(this.focusTracker),i.attachDomRoot(s),t&&this._elementReplacer.replace(t,this.element),this._initPlaceholder(),this._initToolbar(),this.fire("ready")}destroy(){const t=this.view,e=this.editor.editing.view;this._elementReplacer.restore(),e.detachDomRoot(t.editable.name),t.destroy(),super.destroy()}_initToolbar(){const t=this.editor,e=this.view,n=t.editing.view;e.stickyPanel.bind("isActive").to(this.focusTracker,"isFocused"),e.stickyPanel.limiterElement=e.element,this._toolbarConfig.viewportTopOffset&&(e.stickyPanel.viewportTopOffset=this._toolbarConfig.viewportTopOffset),e.toolbar.fillFromConfig(this._toolbarConfig.items,this.componentFactory),function({origin:t,originKeystrokeHandler:e,originFocusTracker:n,toolbar:i,beforeFocus:o,afterBlur:r}){n.add(i.element),e.set("Alt+F10",(t,e)=>{n.isFocused&&!i.focusTracker.isFocused&&(o&&o(),i.focus(),e())}),i.keystrokes.set("Esc",(e,n)=>{i.focusTracker.isFocused&&(t.focus(),r&&r(),n())})}({origin:n,originFocusTracker:this.focusTracker,originKeystrokeHandler:t.keystrokes,toolbar:e.toolbar})}_initPlaceholder(){const t=this.editor,e=t.editing.view,n=e.document.getRoot(),i=t.sourceElement,o=t.config.get("placeholder")||i&&"textarea"===i.tagName.toLowerCase()&&i.getAttribute("placeholder");o&&wl({view:e,element:n,text:o,isDirectHost:!1})}}class Al extends ro{constructor(t){super({idProperty:"viewUid"}),this.on("add",(t,e,n)=>{e.isRendered||e.render(),e.element&&this._parentElement&&this._parentElement.insertBefore(e.element,this._parentElement.children[n])}),this.on("remove",(t,e)=>{e.element&&this._parentElement&&e.element.remove()}),this.locale=t,this._parentElement=null}destroy(){this.map(t=>t.destroy())}setParent(t){this._parentElement=t}delegate(...t){if(!t.length||!t.every(t=>"string"==typeof t))throw new Qn.b("ui-viewcollection-delegate-wrong-events: All event names must be strings.",this);return{to:e=>{for(const n of this)for(const i of t)n.delegate(i).to(e);this.on("add",(n,i)=>{for(const n of t)i.delegate(n).to(e)}),this.on("remove",(n,i)=>{for(const n of t)i.stopDelegating(n,e)})}}}}const Tl="http://www.w3.org/1999/xhtml";class Cl{constructor(t){Object.assign(this,Ll(Dl(t))),this._isRendered=!1,this._revertData=null}render(){const t=this._renderNode({intoFragment:!0});return this._isRendered=!0,t}apply(t){return this._revertData={children:[],bindings:[],attributes:{}},this._renderNode({node:t,isApplying:!0,revertData:this._revertData}),t}revert(t){if(!this._revertData)throw new Qn.b("ui-template-revert-not-applied: Attempting to revert a template which has not been applied yet.",[this,t]);this._revertTemplateFromNode(t,this._revertData)}*getViews(){yield*function*t(e){if(e.children)for(const n of e.children)Fl(n)?yield n:Ul(n)&&(yield*t(n))}(this)}static bind(t,e){return{to:(n,i)=>new Sl({eventNameOrFunction:n,attribute:n,observable:t,emitter:e,callback:i}),if:(n,i,o)=>new Ml({observable:t,emitter:e,attribute:n,valueIfTrue:i,callback:o})}}static extend(t,e){if(t._isRendered)throw new Qn.b("template-extend-render: Attempting to extend a template which has already been rendered.",[this,t]);!function t(e,n){n.attributes&&(e.attributes||(e.attributes={}),zl(e.attributes,n.attributes));n.eventListeners&&(e.eventListeners||(e.eventListeners={}),zl(e.eventListeners,n.eventListeners));n.text&&e.text.push(...n.text);if(n.children&&n.children.length){if(e.children.length!=n.children.length)throw new Qn.b("ui-template-extend-children-mismatch: The number of children in extended definition does not match.",e);let i=0;for(const o of n.children)t(e.children[i++],o)}}(t,Ll(Dl(e)))}_renderNode(t){let e;if(e=t.node?this.tag&&this.text:this.tag?this.text:!this.text)throw new Qn.b('ui-template-wrong-syntax: Node definition must have either "tag" or "text" when rendering a new Node.',this);return this.text?this._renderText(t):this._renderElement(t)}_renderElement(t){let e=t.node;return e||(e=t.node=document.createElementNS(this.ns||Tl,this.tag)),this._renderAttributes(t),this._renderElementChildren(t),this._setUpListeners(t),e}_renderText(t){let e=t.node;return e?t.revertData.text=e.textContent:e=t.node=document.createTextNode(""),El(this.text)?this._bindToObservable({schema:this.text,updater:Nl(e),data:t}):e.textContent=this.text.join(""),e}_renderAttributes(t){let e,n,i,o;if(!this.attributes)return;const r=t.node,s=t.revertData;for(e in this.attributes)if(i=r.getAttribute(e),n=this.attributes[e],s&&(s.attributes[e]=i),o=B(n[0])&&n[0].ns?n[0].ns:null,El(n)){const a=o?n[0].value:n;s&&ql(e)&&a.unshift(i),this._bindToObservable({schema:a,updater:Ol(r,e,o),data:t})}else"style"==e&&"string"!=typeof n[0]?this._renderStyleAttribute(n[0],t):(s&&i&&ql(e)&&n.unshift(i),Bl(n=n.map(t=>t&&t.value||t).reduce((t,e)=>t.concat(e),[]).reduce(Vl,""))||r.setAttributeNS(o,e,n))}_renderStyleAttribute(t,e){const n=e.node;for(const i in t){const o=t[i];El(o)?this._bindToObservable({schema:[o],updater:Rl(n,i),data:e}):n.style[i]=o}}_renderElementChildren(t){const e=t.node,n=t.intoFragment?document.createDocumentFragment():e,i=t.isApplying;let o=0;for(const r of this.children)if(Hl(r)){if(!i){r.setParent(e);for(const t of r)n.appendChild(t.element)}}else if(Fl(r))i||(r.isRendered||r.render(),n.appendChild(r.element));else if(Zo(r))n.appendChild(r);else if(i){const e={children:[],bindings:[],attributes:{}};t.revertData.children.push(e),r._renderNode({node:n.childNodes[o++],isApplying:!0,revertData:e})}else n.appendChild(r.render());t.intoFragment&&e.appendChild(n)}_setUpListeners(t){if(this.eventListeners)for(const e in this.eventListeners){const n=this.eventListeners[e].map(n=>{const[i,o]=e.split("@");return n.activateDomEventListener(i,o,t)});t.revertData&&t.revertData.bindings.push(n)}}_bindToObservable({schema:t,updater:e,data:n}){const i=n.revertData;Il(t,e,n);const o=t.filter(t=>!Bl(t)).filter(t=>t.observable).map(i=>i.activateAttributeListener(t,e,n));i&&i.bindings.push(o)}_revertTemplateFromNode(t,e){for(const t of e.bindings)for(const e of t)e();if(e.text)t.textContent=e.text;else{for(const n in e.attributes){const i=e.attributes[n];null===i?t.removeAttribute(n):t.setAttribute(n,i)}for(let n=0;nIl(t,e,n);return this.emitter.listenTo(this.observable,"change:"+this.attribute,i),()=>{this.emitter.stopListening(this.observable,"change:"+this.attribute,i)}}}class Sl extends Pl{activateDomEventListener(t,e,n){const i=(t,n)=>{e&&!n.target.matches(e)||("function"==typeof this.eventNameOrFunction?this.eventNameOrFunction(n):this.observable.fire(this.eventNameOrFunction,n))};return this.emitter.listenTo(n.node,t,i),()=>{this.emitter.stopListening(n.node,t,i)}}}class Ml extends Pl{getValue(t){return!Bl(super.getValue(t))&&(this.valueIfTrue||!0)}}function El(t){return!!t&&(t.value&&(t=t.value),Array.isArray(t)?t.some(El):t instanceof Pl)}function Il(t,e,{node:n}){let i=function(t,e){return t.map(t=>t instanceof Pl?t.getValue(e):t)}(t,n);Bl(i=1==t.length&&t[0]instanceof Ml?i[0]:i.reduce(Vl,""))?e.remove():e.set(i)}function Nl(t){return{set(e){t.textContent=e},remove(){t.textContent=""}}}function Ol(t,e,n){return{set(i){t.setAttributeNS(n,e,i)},remove(){t.removeAttributeNS(n,e)}}}function Rl(t,e){return{set(n){t.style[e]=n},remove(){t.style[e]=null}}}function Dl(t){return Wn(t,t=>{if(t&&(t instanceof Pl||Ul(t)||Fl(t)||Hl(t)))return t})}function Ll(t){if("string"==typeof t?t=function(t){return{text:[t]}}(t):t.text&&function(t){Array.isArray(t.text)||(t.text=[t.text])}(t),t.on&&(t.eventListeners=function(t){for(const e in t)jl(t,e);return t}(t.on),delete t.on),!t.text){t.attributes&&function(t){for(const e in t)t[e].value&&(t[e].value=[].concat(t[e].value)),jl(t,e)}(t.attributes);const e=[];if(t.children)if(Hl(t.children))e.push(t.children);else for(const n of t.children)Ul(n)||Fl(n)||Zo(n)?e.push(n):e.push(new Cl(n));t.children=e}return t}function jl(t,e){Array.isArray(t[e])||(t[e]=[t[e]])}function Vl(t,e){return Bl(e)?t:Bl(t)?e:`${t} ${e}`}function zl(t,e){for(const n in e)t[n]?t[n].push(...e[n]):t[n]=e[n]}function Bl(t){return!t&&0!==t}function Fl(t){return t instanceof Wl}function Ul(t){return t instanceof Cl}function Hl(t){return t instanceof Al}function ql(t){return"class"==t||"style"==t}n(15);class Wl{constructor(t){this.element=null,this.isRendered=!1,this.locale=t,this.t=t&&t.t,this._viewCollections=new ro,this._unboundChildren=this.createCollection(),this._viewCollections.on("add",(e,n)=>{n.locale=t}),this.decorate("render")}get bindTemplate(){return this._bindTemplate?this._bindTemplate:this._bindTemplate=Cl.bind(this,this)}createCollection(){const t=new Al;return this._viewCollections.add(t),t}registerChild(t){bi(t)||(t=[t]);for(const e of t)this._unboundChildren.add(e)}deregisterChild(t){bi(t)||(t=[t]);for(const e of t)this._unboundChildren.remove(e)}setTemplate(t){this.template=new Cl(t)}extendTemplate(t){Cl.extend(this.template,t)}render(){if(this.isRendered)throw new Qn.b("ui-view-render-already-rendered: This View has already been rendered.",this);this.template&&(this.element=this.template.render(),this.registerChild(this.template.getViews())),this.isRendered=!0}destroy(){this.stopListening(),this._viewCollections.map(t=>t.destroy()),this.template&&this.template._revertData&&this.template.revert(this.element)}}li(Wl,ur),li(Wl,Ui);n(17);class Yl extends Wl{constructor(t){super(t),this.body=this.createCollection()}render(){super.render(),this._renderBodyCollection()}destroy(){return this._bodyCollectionContainer.remove(),super.destroy()}_renderBodyCollection(){const t=this.locale,e=this._bodyCollectionContainer=new Cl({tag:"div",attributes:{class:["ck","ck-reset_all","ck-body","ck-rounded-corners"],dir:t.uiLanguageDirection},children:this.body}).render();document.body.appendChild(e)}}n(19);class $l extends Wl{constructor(t){super(t),this.set("text"),this.set("for");const e=this.bindTemplate;this.setTemplate({tag:"label",attributes:{class:["ck","ck-label"],for:e.to("for")},children:[{text:e.to("text")}]})}}class Gl extends Yl{constructor(t){super(t);const e=Zn();this.top=this.createCollection(),this.main=this.createCollection(),this._voiceLabelView=this._createVoiceLabel(e),this.setTemplate({tag:"div",attributes:{class:["ck","ck-reset","ck-editor","ck-rounded-corners"],role:"application",dir:t.uiLanguageDirection,lang:t.uiLanguage,"aria-labelledby":`ck-editor__aria-label_${e}`},children:[this._voiceLabelView,{tag:"div",attributes:{class:["ck","ck-editor__top","ck-reset_all"],role:"presentation"},children:this.top},{tag:"div",attributes:{class:["ck","ck-editor__main"],role:"presentation"},children:this.main}]})}_createVoiceLabel(t){const e=this.t,n=new $l;return n.text=e("bk"),n.extendTemplate({attributes:{id:`ck-editor__aria-label_${t}`,class:"ck-voice-label"}}),n}}class Ql extends Wl{constructor(t,e,n){super(t),this.setTemplate({tag:"div",attributes:{class:["ck","ck-content","ck-editor__editable","ck-rounded-corners"],lang:t.contentLanguage,dir:t.contentLanguageDirection}}),this.name=null,this.set("isFocused",!1),this._editableElement=n,this._hasExternalElement=!!this._editableElement,this._editingView=e}render(){super.render(),this._hasExternalElement?this.template.apply(this.element=this._editableElement):this._editableElement=this.element,this.on("change:isFocused",()=>this._updateIsFocusedClasses()),this._updateIsFocusedClasses()}destroy(){this._hasExternalElement&&this.template.revert(this._editableElement),super.destroy()}_updateIsFocusedClasses(){const t=this._editingView;function e(e){t.change(n=>{const i=t.document.getRoot(e.name);n.addClass(e.isFocused?"ck-focused":"ck-blurred",i),n.removeClass(e.isFocused?"ck-blurred":"ck-focused",i)})}t.isRenderingInProgress?function n(i){t.once("change:isRenderingInProgress",(t,o,r)=>{r?n(i):e(i)})}(this):e(this)}}class Kl extends Ql{constructor(t,e,n){super(t,e,n),this.extendTemplate({attributes:{role:"textbox",class:"ck-editor__editable_inline"}})}render(){super.render();const t=this._editingView,e=this.t;t.change(n=>{const i=t.document.getRoot(this.name);n.setAttribute("aria-label",e("bs",[this.name]),i)})}}function Jl(t){return e=>e+t}n(21);const Zl=Jl("px");class Xl extends Wl{constructor(t){super(t);const e=this.bindTemplate;this.set("isActive",!1),this.set("isSticky",!1),this.set("limiterElement",null),this.set("limiterBottomOffset",50),this.set("viewportTopOffset",0),this.set("_marginLeft",null),this.set("_isStickyToTheLimiter",!1),this.set("_hasViewportTopOffset",!1),this.content=this.createCollection(),this._contentPanelPlaceholder=new Cl({tag:"div",attributes:{class:["ck","ck-sticky-panel__placeholder"],style:{display:e.to("isSticky",t=>t?"block":"none"),height:e.to("isSticky",t=>t?Zl(this._panelRect.height):null)}}}).render(),this._contentPanel=new Cl({tag:"div",attributes:{class:["ck","ck-sticky-panel__content",e.if("isSticky","ck-sticky-panel__content_sticky"),e.if("_isStickyToTheLimiter","ck-sticky-panel__content_sticky_bottom-limit")],style:{width:e.to("isSticky",t=>t?Zl(this._contentPanelPlaceholder.getBoundingClientRect().width):null),top:e.to("_hasViewportTopOffset",t=>t?Zl(this.viewportTopOffset):null),bottom:e.to("_isStickyToTheLimiter",t=>t?Zl(this.limiterBottomOffset):null),marginLeft:e.to("_marginLeft")}},children:this.content}).render(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-sticky-panel"]},children:[this._contentPanelPlaceholder,this._contentPanel]})}render(){super.render(),this._checkIfShouldBeSticky(),this.listenTo(ir.window,"scroll",()=>{this._checkIfShouldBeSticky()}),this.listenTo(this,"change:isActive",()=>{this._checkIfShouldBeSticky()})}_checkIfShouldBeSticky(){const t=this._panelRect=this._contentPanel.getBoundingClientRect();let e;this.limiterElement?(e=this._limiterRect=this.limiterElement.getBoundingClientRect(),this.isSticky=this.isActive&&e.top{this[e](),n()})}}get first(){return this.focusables.find(ed)||null}get last(){return this.focusables.filter(ed).slice(-1)[0]||null}get next(){return this._getFocusableItem(1)}get previous(){return this._getFocusableItem(-1)}get current(){let t=null;return null===this.focusTracker.focusedElement?null:(this.focusables.find((e,n)=>{const i=e.element===this.focusTracker.focusedElement;return i&&(t=n),i}),t)}focusFirst(){this._focus(this.first)}focusLast(){this._focus(this.last)}focusNext(){this._focus(this.next)}focusPrevious(){this._focus(this.previous)}_focus(t){t&&t.focus()}_getFocusableItem(t){const e=this.current,n=this.focusables.length;if(!n)return null;if(null===e)return this[1===t?"first":"last"];let i=(e+n+t)%n;do{const e=this.focusables.get(i);if(ed(e))return e;i=(i+n+t)%n}while(i!==e);return null}}function ed(t){return!(!t.focus||"none"==ir.window.getComputedStyle(t.element).display)}class nd extends Wl{constructor(t){super(t),this.setTemplate({tag:"span",attributes:{class:["ck","ck-toolbar__separator"]}})}}const id=100;class od{constructor(t){this._callback=t,this._elements=new Set,this._previousRects=new Map,this._periodicCheckTimeout=null}observe(t){this._elements.add(t),1===this._elements.size&&this._startPeriodicCheck()}unobserve(t){this._elements.delete(t),this._previousRects.delete(t),this._elements.size||this._stopPeriodicCheck()}disconnect(){this._elements.forEach(t=>this.unobserve(t))}_startPeriodicCheck(){const t=()=>{this._checkElementRectsAndExecuteCallback(),this._periodicCheckTimeout=setTimeout(t,id)};this.listenTo(ir.window,"resize",()=>{this._checkElementRectsAndExecuteCallback()}),t()}_stopPeriodicCheck(){clearTimeout(this._periodicCheckTimeout),this.stopListening(),this._previousRects.clear()}_checkElementRectsAndExecuteCallback(){const t=[];for(const e of this._elements)this._hasRectChanged(e)&&t.push({target:e,contentRect:this._previousRects.get(e)});t.length&&this._callback(t)}_hasRectChanged(t){if(!t.ownerDocument.body.contains(t))return!1;const e=new Ps(t),n=this._previousRects.get(t),i=!n||!n.isEqual(e);return this._previousRects.set(t,e),i}}li(od,ur);class rd extends Wl{constructor(t){super(t);const e=this.bindTemplate;this.set("isVisible",!1),this.set("position","se"),this.children=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-reset","ck-dropdown__panel",e.to("position",t=>`ck-dropdown__panel_${t}`),e.if("isVisible","ck-dropdown__panel-visible")]},children:this.children,on:{selectstart:e.to(t=>t.preventDefault())}})}focus(){this.children.length&&this.children.first.focus()}focusLast(){if(this.children.length){const t=this.children.last;"function"==typeof t.focusLast?t.focusLast():t.focus()}}}n(23);function sd({element:t,target:e,positions:n,limiter:i,fitInViewport:o}){Y(e)&&(e=e()),Y(i)&&(i=i());const r=function(t){for(;t&&"html"!=t.tagName.toLowerCase();){if("static"!=ir.window.getComputedStyle(t).position)return t;t=t.parentElement}return null}(t.parentElement),s=new Ps(t),a=new Ps(e);let c,l;if(i||o){const t=i&&new Ps(i).getVisible(),e=o&&new Ps(ir.window);[l,c]=function(t,e,n,i,o){let r,s,a=0,c=0;const l=n.getArea();return t.some(t=>{const[d,h]=ad(t,e,n);let u,f;if(i)if(o){const t=i.getIntersection(o);u=t?t.getIntersectionArea(h):0}else u=i.getIntersectionArea(h);function g(){c=f,a=u,r=h,s=d}return o&&(f=o.getIntersectionArea(h)),o&&!i?f>c&&g():!o&&i?u>a&&g():f>c&&u>=a?g():f>=c&&u>a&&g(),u===l}),r?[s,r]:null}(n,a,s,t,e)||ad(n[0],a,s)}else[l,c]=ad(n[0],a,s);let{left:d,top:h}=cd(c);if(r){const t=cd(new Ps(r)),e=Ts(r);d-=t.left,h-=t.top,d+=r.scrollLeft,h+=r.scrollTop,d-=e.left,h-=e.top}return{left:d,top:h,name:l}}function ad(t,e,n){const{left:i,top:o,name:r}=t(e,n);return[r,n.clone().moveTo(i,o)]}function cd({left:t,top:e}){const{scrollX:n,scrollY:i}=ir.window;return{left:t+n,top:e+i}}class ld extends Wl{constructor(t,e,n){super(t);const i=this.bindTemplate;this.buttonView=e,this.panelView=n,this.set("isOpen",!1),this.set("isEnabled",!0),this.set("class"),this.set("panelPosition","auto"),this.focusTracker=new ml,this.keystrokes=new sl,this.setTemplate({tag:"div",attributes:{class:["ck","ck-dropdown",i.to("class"),i.if("isEnabled","ck-disabled",t=>!t)]},children:[e,n]}),e.extendTemplate({attributes:{class:["ck-dropdown__button"]}})}render(){super.render(),this.listenTo(this.buttonView,"open",()=>{this.isOpen=!this.isOpen}),this.panelView.bind("isVisible").to(this,"isOpen"),this.on("change:isOpen",()=>{this.isOpen&&("auto"===this.panelPosition?this.panelView.position=ld._getOptimalPosition({element:this.panelView.element,target:this.buttonView.element,fitInViewport:!0,positions:this._panelPositions}).name:this.panelView.position=this.panelPosition)}),this.keystrokes.listenTo(this.element),this.focusTracker.add(this.element);const t=(t,e)=>{this.isOpen&&(this.buttonView.focus(),this.isOpen=!1,e())};this.keystrokes.set("arrowdown",(t,e)=>{this.buttonView.isEnabled&&!this.isOpen&&(this.isOpen=!0,e())}),this.keystrokes.set("arrowright",(t,e)=>{this.isOpen&&e()}),this.keystrokes.set("arrowleft",t),this.keystrokes.set("esc",t)}focus(){this.buttonView.focus()}get _panelPositions(){const{southEast:t,southWest:e,northEast:n,northWest:i}=ld.defaultPanelPositions;return"ltr"===this.locale.uiLanguageDirection?[t,e,n,i]:[e,t,i,n]}}ld.defaultPanelPositions={southEast:t=>({top:t.bottom,left:t.left,name:"se"}),southWest:(t,e)=>({top:t.bottom,left:t.left-e.width+t.width,name:"sw"}),northEast:(t,e)=>({top:t.top-e.height,left:t.left,name:"ne"}),northWest:(t,e)=>({top:t.bottom-e.height,left:t.left-e.width+t.width,name:"nw"})},ld._getOptimalPosition=sd;n(25);class dd extends Wl{constructor(){super();const t=this.bindTemplate;this.set("content",""),this.set("viewBox","0 0 20 20"),this.set("fillColor",""),this.setTemplate({tag:"svg",ns:"http://www.w3.org/2000/svg",attributes:{class:["ck","ck-icon"],viewBox:t.to("viewBox")}})}render(){super.render(),this._updateXMLContent(),this._colorFillPaths(),this.on("change:content",()=>{this._updateXMLContent(),this._colorFillPaths()}),this.on("change:fillColor",()=>{this._colorFillPaths()})}_updateXMLContent(){if(this.content){const t=(new DOMParser).parseFromString(this.content.trim(),"image/svg+xml").querySelector("svg"),e=t.getAttribute("viewBox");for(e&&(this.viewBox=e),this.element.innerHTML="";t.childNodes.length>0;)this.element.appendChild(t.childNodes[0])}}_colorFillPaths(){this.fillColor&&this.element.querySelectorAll(".ck-icon__fill").forEach(t=>{t.style.fill=this.fillColor})}}n(27);class hd extends Wl{constructor(t){super(t),this.set("text",""),this.set("position","s");const e=this.bindTemplate;this.setTemplate({tag:"span",attributes:{class:["ck","ck-tooltip",e.to("position",t=>"ck-tooltip_"+t),e.if("text","ck-hidden",t=>!t.trim())]},children:[{tag:"span",attributes:{class:["ck","ck-tooltip__text"]},children:[{text:e.to("text")}]}]})}}n(29);class ud extends Wl{constructor(t){super(t);const e=this.bindTemplate,n=Zn();this.set("class"),this.set("labelStyle"),this.set("icon"),this.set("isEnabled",!0),this.set("isOn",!1),this.set("isVisible",!0),this.set("isToggleable",!1),this.set("keystroke"),this.set("label"),this.set("tabindex",-1),this.set("tooltip"),this.set("tooltipPosition","s"),this.set("type","button"),this.set("withText",!1),this.set("withKeystroke",!1),this.children=this.createCollection(),this.tooltipView=this._createTooltipView(),this.labelView=this._createLabelView(n),this.iconView=new dd,this.iconView.extendTemplate({attributes:{class:"ck-button__icon"}}),this.keystrokeView=this._createKeystrokeView(),this.bind("_tooltipString").to(this,"tooltip",this,"label",this,"keystroke",this._getTooltipString.bind(this)),this.setTemplate({tag:"button",attributes:{class:["ck","ck-button",e.to("class"),e.if("isEnabled","ck-disabled",t=>!t),e.if("isVisible","ck-hidden",t=>!t),e.to("isOn",t=>t?"ck-on":"ck-off"),e.if("withText","ck-button_with-text"),e.if("withKeystroke","ck-button_with-keystroke")],type:e.to("type",t=>t||"button"),tabindex:e.to("tabindex"),"aria-labelledby":`ck-editor__aria-label_${n}`,"aria-disabled":e.if("isEnabled",!0,t=>!t),"aria-pressed":e.to("isOn",t=>!!this.isToggleable&&String(t))},children:this.children,on:{mousedown:e.to(t=>{t.preventDefault()}),click:e.to(t=>{this.isEnabled?this.fire("execute"):t.preventDefault()})}})}render(){super.render(),this.icon&&(this.iconView.bind("content").to(this,"icon"),this.children.add(this.iconView)),this.children.add(this.tooltipView),this.children.add(this.labelView),this.withKeystroke&&this.children.add(this.keystrokeView)}focus(){this.element.focus()}_createTooltipView(){const t=new hd;return t.bind("text").to(this,"_tooltipString"),t.bind("position").to(this,"tooltipPosition"),t}_createLabelView(t){const e=new Wl,n=this.bindTemplate;return e.setTemplate({tag:"span",attributes:{class:["ck","ck-button__label"],style:n.to("labelStyle"),id:`ck-editor__aria-label_${t}`},children:[{text:this.bindTemplate.to("label")}]}),e}_createKeystrokeView(){const t=new Wl;return t.setTemplate({tag:"span",attributes:{class:["ck","ck-button__keystroke"]},children:[{text:this.bindTemplate.to("keystroke",t=>vo(t))}]}),t}_getTooltipString(t,e,n){return t?"string"==typeof t?t:(n&&(n=vo(n)),t instanceof Function?t(e,n):`${e}${n?` (${n})`:""}`):""}}var fd='';class gd extends ud{constructor(t){super(t),this.arrowView=this._createArrowView(),this.extendTemplate({attributes:{"aria-haspopup":!0}}),this.delegate("execute").to(this,"open")}render(){super.render(),this.children.add(this.arrowView)}_createArrowView(){const t=new dd;return t.content=fd,t.extendTemplate({attributes:{class:"ck-dropdown__arrow"}}),t}}n(31);class md extends Wl{constructor(){super(),this.items=this.createCollection(),this.focusTracker=new ml,this.keystrokes=new sl,this._focusCycler=new td({focusables:this.items,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"arrowup",focusNext:"arrowdown"}}),this.setTemplate({tag:"ul",attributes:{class:["ck","ck-reset","ck-list"]},children:this.items})}render(){super.render();for(const t of this.items)this.focusTracker.add(t.element);this.items.on("add",(t,e)=>{this.focusTracker.add(e.element)}),this.items.on("remove",(t,e)=>{this.focusTracker.remove(e.element)}),this.keystrokes.listenTo(this.element)}focus(){this._focusCycler.focusFirst()}focusLast(){this._focusCycler.focusLast()}}class pd extends Wl{constructor(t){super(t),this.children=this.createCollection(),this.setTemplate({tag:"li",attributes:{class:["ck","ck-list__item"]},children:this.children})}focus(){this.children.first.focus()}}class bd extends Wl{constructor(t){super(t),this.setTemplate({tag:"li",attributes:{class:["ck","ck-list__separator"]}})}}n(33);class wd extends ud{constructor(t){super(t),this.isToggleable=!0,this.toggleSwitchView=this._createToggleView(),this.extendTemplate({attributes:{class:"ck-switchbutton"}})}render(){super.render(),this.children.add(this.toggleSwitchView)}_createToggleView(){const t=new Wl;return t.setTemplate({tag:"span",attributes:{class:["ck","ck-button__toggle"]},children:[{tag:"span",attributes:{class:["ck","ck-button__toggle__inner"]}}]}),t}}function kd({emitter:t,activator:e,callback:n,contextElements:i}){t.listenTo(document,"mousedown",(t,{target:o})=>{if(e()){for(const t of i)if(t.contains(o))return;n()}})}n(35),n(37);function _d(t,e=gd){const n=new e(t),i=new rd(t),o=new ld(t,n,i);return n.bind("isEnabled").to(o),n instanceof gd?n.bind("isOn").to(o,"isOpen"):n.arrowView.bind("isOn").to(o,"isOpen"),function(t){(function(t){t.on("render",()=>{kd({emitter:t,activator:()=>t.isOpen,callback:()=>{t.isOpen=!1},contextElements:[t.element]})})})(t),function(t){t.on("execute",e=>{e.source instanceof wd||(t.isOpen=!1)})}(t),function(t){t.keystrokes.set("arrowdown",(e,n)=>{t.isOpen&&(t.panelView.focus(),n())}),t.keystrokes.set("arrowup",(e,n)=>{t.isOpen&&(t.panelView.focusLast(),n())})}(t)}(o),o}function vd(t,e){const n=t.locale,i=t.listView=new md(n);i.items.bindTo(e).using(({type:t,model:e})=>{if("separator"===t)return new bd(n);if("button"===t||"switchbutton"===t){const i=new pd(n);let o;return(o="button"===t?new ud(n):new wd(n)).bind(...Object.keys(e)).to(e),o.delegate("execute").to(i),i.children.add(o),i}}),t.panelView.children.add(i),i.items.delegate("execute").to(t)}var yd='\n';n(39);class xd extends Wl{constructor(t,e){super(t);const n=this.bindTemplate,i=this.t;var o;this.options=e||{},this.set("ariaLabel",i("bp")),this.items=this.createCollection(),this.focusTracker=new ml,this.keystrokes=new sl,this.set("class"),this.itemsView=new Ad(t),this.children=this.createCollection(),this.children.add(this.itemsView),this.focusables=this.createCollection(),this._focusCycler=new td({focusables:this.focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:["arrowleft","arrowup"],focusNext:["arrowright","arrowdown"]}}),this.setTemplate({tag:"div",attributes:{class:["ck","ck-toolbar",n.to("class")],role:"toolbar","aria-label":n.to("ariaLabel")},children:this.children,on:{mousedown:(o=this,o.bindTemplate.to(t=>{t.target===o.element&&t.preventDefault()}))}}),this._behavior=this.options.shouldGroupWhenFull?new Cd(this):new Td(this)}render(){super.render();for(const t of this.items)this.focusTracker.add(t.element);this.items.on("add",(t,e)=>{this.focusTracker.add(e.element)}),this.items.on("remove",(t,e)=>{this.focusTracker.remove(e.element)}),this.keystrokes.listenTo(this.element),this._behavior.render(this)}destroy(){return this._behavior.destroy(),super.destroy()}focus(){this._focusCycler.focusFirst()}focusLast(){this._focusCycler.focusLast()}fillFromConfig(t,e){t.map(t=>{"|"==t?this.items.add(new nd):e.has(t)?this.items.add(e.create(t)):console.warn(Object(Qn.a)("toolbarview-item-unavailable: The requested toolbar item is unavailable."),{name:t})})}}class Ad extends Wl{constructor(t){super(t),this.children=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-toolbar__items"]},children:this.children})}}class Td{constructor(t){const e=t.bindTemplate;t.set("isVertical",!1),t.itemsView.children.bindTo(t.items).using(t=>t),t.focusables.bindTo(t.items).using(t=>t),t.extendTemplate({attributes:{class:[e.if("isVertical","ck-toolbar_vertical")]}})}render(){}destroy(){}}class Cd{constructor(t){this.viewChildren=t.children,this.viewFocusables=t.focusables,this.viewItemsView=t.itemsView,this.viewFocusTracker=t.focusTracker,this.viewLocale=t.locale,this.ungroupedItems=t.createCollection(),this.groupedItems=t.createCollection(),this.groupedItemsDropdown=this._createGroupedItemsDropdown(),this.resizeObserver=null,this.cachedPadding=null,t.itemsView.children.bindTo(this.ungroupedItems).using(t=>t),this.ungroupedItems.on("add",this._updateFocusCycleableItems.bind(this)),this.ungroupedItems.on("remove",this._updateFocusCycleableItems.bind(this)),t.children.on("add",this._updateFocusCycleableItems.bind(this)),t.children.on("remove",this._updateFocusCycleableItems.bind(this)),t.items.on("add",(t,e,n)=>{n>this.ungroupedItems.length?this.groupedItems.add(e,n-this.ungroupedItems.length):this.ungroupedItems.add(e,n),this._updateGrouping()}),t.items.on("remove",(t,e,n)=>{n>this.ungroupedItems.length?this.groupedItems.remove(e):this.ungroupedItems.remove(e),this._updateGrouping()}),t.extendTemplate({attributes:{class:["ck-toolbar_grouping"]}})}render(t){this.viewElement=t.element,this._enableGroupingOnResize()}destroy(){this.groupedItemsDropdown.destroy(),this.resizeObserver.disconnect()}_updateGrouping(){if(!this.viewElement.ownerDocument.body.contains(this.viewElement))return;let t;for(;this._areItemsOverflowing;)this._groupLastItem(),t=!0;if(!t&&this.groupedItems.length){for(;this.groupedItems.length&&!this._areItemsOverflowing;)this._ungroupFirstItem();this._areItemsOverflowing&&this._groupLastItem()}}get _areItemsOverflowing(){if(!this.ungroupedItems.length)return!1;const t=this.viewElement,e=this.viewLocale.uiLanguageDirection,n=new Ps(t.lastChild),i=new Ps(t);if(!this.cachedPadding){const n=ir.window.getComputedStyle(t),i="ltr"===e?"paddingRight":"paddingLeft";this.cachedPadding=Number.parseInt(n[i])}return"ltr"===e?n.right>i.right-this.cachedPadding:n.left{t&&t===e.contentRect.width||(this._updateGrouping(),t=e.contentRect.width)},"function"==typeof ir.window.ResizeObserver?new ir.window.ResizeObserver(e):new od(e)),this.resizeObserver.observe(this.viewElement),this._updateGrouping()}_groupLastItem(){this.groupedItems.length||(this.viewChildren.add(new nd),this.viewChildren.add(this.groupedItemsDropdown),this.viewFocusTracker.add(this.groupedItemsDropdown.element)),this.groupedItems.add(this.ungroupedItems.remove(this.ungroupedItems.last),0)}_ungroupFirstItem(){this.ungroupedItems.add(this.groupedItems.remove(this.groupedItems.first)),this.groupedItems.length||(this.viewChildren.remove(this.groupedItemsDropdown),this.viewChildren.remove(this.viewChildren.last),this.viewFocusTracker.remove(this.groupedItemsDropdown.element))}_createGroupedItemsDropdown(){const t=this.viewLocale,e=t.t,n=_d(t);return n.class="ck-toolbar__grouped-dropdown",n.panelPosition="ltr"===t.uiLanguageDirection?"sw":"se",function(t,e){const n=t.locale,i=n.t,o=t.toolbarView=new xd(n);o.set("ariaLabel",i("bl")),t.extendTemplate({attributes:{class:["ck-toolbar-dropdown"]}}),e.map(t=>o.items.add(t)),t.panelView.children.add(o),o.items.delegate("execute").to(t)}(n,[]),n.buttonView.set({label:e("bq"),tooltip:!0,icon:yd}),n.toolbarView.items.bindTo(this.groupedItems).using(t=>t),n}_updateFocusCycleableItems(){this.viewFocusables.clear(),this.ungroupedItems.map(t=>{this.viewFocusables.add(t)}),this.groupedItems.length&&this.viewFocusables.add(this.groupedItemsDropdown)}}n(41);class Pd extends Gl{constructor(t,e,n={}){super(t),this.stickyPanel=new Xl(t),this.toolbar=new xd(t,{shouldGroupWhenFull:n.shouldToolbarGroupWhenFull}),this.editable=new Kl(t,e)}render(){super.render(),this.stickyPanel.content.add(this.toolbar),this.top.add(this.stickyPanel),this.main.add(this.editable)}}class Sd extends cl{constructor(t,e){super(e),Yn(t)&&(this.sourceElement=t),this.data.processor=new ul,this.model.document.createRoot();const n=!this.config.get("toolbar.shouldNotGroupWhenFull"),i=new Pd(this.locale,this.editing.view,{shouldToolbarGroupWhenFull:n});this.ui=new xl(this,i),function(t){if(!Y(t.updateSourceElement))throw new Qn.b("attachtoform-missing-elementapi-interface: Editor passed to attachToForm() must implement ElementApi.",t);const e=t.sourceElement;if(e&&"textarea"===e.tagName.toLowerCase()&&e.form){let n;const i=e.form,o=()=>t.updateSourceElement();Y(i.submit)&&(n=i.submit,i.submit=()=>{o(),n.apply(i)}),i.addEventListener("submit",o),t.on("destroy",()=>{i.removeEventListener("submit",o),n&&(i.submit=n)})}}(this)}destroy(){return this.sourceElement&&this.updateSourceElement(),this.ui.destroy(),super.destroy()}static create(t,e={}){return new Promise(n=>{const i=new this(t,e);n(i.initPlugins().then(()=>i.ui.init(Yn(t)?t:null)).then(()=>{if(!Yn(t)&&e.initialData)throw new Qn.b("editor-create-initial-data: The config.initialData option cannot be used together with initial data passed in Editor.create().",null);const n=e.initialData||function(t){return Yn(t)?(e=t,e instanceof HTMLTextAreaElement?e.value:e.innerHTML):t;var e}(t);return i.data.init(n)}).then(()=>i.fire("ready")).then(()=>i))})}}li(Sd,ll),li(Sd,dl);class Md{constructor(t){this.editor=t}destroy(){this.stopListening()}}li(Md,Ui);class Ed{constructor(t){this.files=function(t){const e=t.files?Array.from(t.files):[],n=t.items?Array.from(t.items):[];if(e.length)return e;return n.filter(t=>"file"===t.kind).map(t=>t.getAsFile())}(t),this._native=t}get types(){return this._native.types}getData(t){return this._native.getData(t)}setData(t,e){this._native.setData(t,e)}}class Id extends is{constructor(t){super(t);const e=this.document;function n(t,n){n.preventDefault();const i=n.dropRange?[n.dropRange]:Array.from(e.selection.getRanges()),o=new Jn(e,"clipboardInput");e.fire(o,{dataTransfer:n.dataTransfer,targetRanges:i}),o.stop.called&&n.stopPropagation()}this.domEventType=["paste","copy","cut","drop","dragover"],this.listenTo(e,"paste",n,{priority:"low"}),this.listenTo(e,"drop",n,{priority:"low"})}onDomEvent(t){const e={dataTransfer:new Ed(t.clipboardData?t.clipboardData:t.dataTransfer)};"drop"==t.type&&(e.dropRange=function(t,e){const n=e.target.ownerDocument,i=e.clientX,o=e.clientY;let r;n.caretRangeFromPoint&&n.caretRangeFromPoint(i,o)?r=n.caretRangeFromPoint(i,o):e.rangeParent&&((r=n.createRange()).setStart(e.rangeParent,e.rangeOffset),r.collapse(!0));return r?t.domConverter.domRangeToView(r):t.document.selection.getFirstRange()}(this.view,t)),this.fire(t.type,t,e)}}const Nd=["figcaption","li"];class Od extends Md{static get pluginName(){return"Clipboard"}init(){const t=this.editor,e=t.model.document,n=t.editing.view,i=n.document;function o(n,o){const r=o.dataTransfer;o.preventDefault();const s=t.data.toView(t.model.getSelectedContent(e.selection));i.fire("clipboardOutput",{dataTransfer:r,content:s,method:n.name})}this._htmlDataProcessor=new ul,n.addObserver(Id),this.listenTo(i,"clipboardInput",e=>{t.isReadOnly&&e.stop()},{priority:"highest"}),this.listenTo(i,"clipboardInput",(t,e)=>{const i=e.dataTransfer;let o="";i.getData("text/html")?o=function(t){return t.replace(/(\s+)<\/span>/g,(t,e)=>1==e.length?" ":e)}(i.getData("text/html")):i.getData("text/plain")&&(o=function(t){return(t=t.replace(//g,">").replace(/\n/g,"

").replace(/^\s/," ").replace(/\s$/," ").replace(/\s\s/g,"  ")).indexOf("

")>-1&&(t=`

${t}

`),t}(i.getData("text/plain"))),o=this._htmlDataProcessor.toView(o),this.fire("inputTransformation",{content:o,dataTransfer:i}),n.scrollToTheSelection()},{priority:"low"}),this.listenTo(this,"inputTransformation",(t,e)=>{if(!e.content.isEmpty){const t=this.editor.data,n=this.editor.model,i=t.toModel(e.content,"$clipboardHolder");if(0==i.childCount)return;n.insertContent(i)}},{priority:"low"}),this.listenTo(i,"copy",o,{priority:"low"}),this.listenTo(i,"cut",(e,n)=>{t.isReadOnly?n.preventDefault():o(e,n)},{priority:"low"}),this.listenTo(i,"clipboardOutput",(n,i)=>{i.content.isEmpty||(i.dataTransfer.setData("text/html",this._htmlDataProcessor.toData(i.content)),i.dataTransfer.setData("text/plain",function t(e){let n="";if(e.is("text")||e.is("textProxy"))n=e.data;else if(e.is("img")&&e.hasAttribute("alt"))n=e.getAttribute("alt");else{let i=null;for(const o of e.getChildren()){const e=t(o);i&&(i.is("containerElement")||o.is("containerElement"))&&(Nd.includes(i.name)||Nd.includes(o.name)?n+="\n":n+="\n\n"),n+=e,i=o}}return n}(i.content))),"cut"==i.method&&t.model.deleteContent(e.selection)},{priority:"low"})}}class Rd{constructor(t){this.editor=t,this.set("value",void 0),this.set("isEnabled",!1),this._disableStack=new Set,this.decorate("execute"),this.listenTo(this.editor.model.document,"change",()=>{this.refresh()}),this.on("execute",t=>{this.isEnabled||t.stop()},{priority:"high"}),this.listenTo(t,"change:isReadOnly",(t,e,n)=>{n?this.forceDisabled("readOnlyMode"):this.clearForceDisabled("readOnlyMode")})}refresh(){this.isEnabled=!0}forceDisabled(t){this._disableStack.add(t),1==this._disableStack.size&&(this.on("set:isEnabled",Dd,{priority:"highest"}),this.isEnabled=!1)}clearForceDisabled(t){this._disableStack.delete(t),0==this._disableStack.size&&(this.off("set:isEnabled",Dd),this.refresh())}execute(){}destroy(){this.stopListening()}}function Dd(t){t.return=!1,t.stop()}function*Ld(t,e){for(const n of e)n&&t.getAttributeProperties(n[0]).copyOnEnter&&(yield n)}li(Rd,Ui);class jd extends Rd{execute(){const t=this.editor.model,e=t.document;t.change(n=>{!function(t,e,n,i){const o=n.isCollapsed,r=n.getFirstRange(),s=r.start.parent,a=r.end.parent;if(i.isLimit(s)||i.isLimit(a))return void(o||s!=a||t.deleteContent(n));if(o){const t=Ld(e.model.schema,n.getAttributes());Vd(e,r.start),e.setSelectionAttribute(t)}else{const i=!(r.start.isAtStart&&r.end.isAtEnd),o=s==a;t.deleteContent(n,{leaveUnmerged:i}),i&&(o?Vd(e,n.focus):e.setSelection(a,0))}}(this.editor.model,n,e.selection,t.schema),this.fire("afterExecute",{writer:n})})}}function Vd(t,e){t.split(e),t.setSelection(e.parent.nextSibling,0)}class zd extends mr{constructor(t){super(t);const e=this.document;e.on("keydown",(t,n)=>{if(this.isEnabled&&n.keyCode==wo.enter){let i;e.once("enter",t=>i=t,{priority:"highest"}),e.fire("enter",new ns(e,n.domEvent,{isSoft:n.shiftKey})),i&&i.stop.called&&t.stop()}})}observe(){}}class Bd extends Md{static get pluginName(){return"Enter"}init(){const t=this.editor,e=t.editing.view,n=e.document;e.addObserver(zd),t.commands.add("enter",new jd(t)),this.listenTo(n,"enter",(n,i)=>{i.preventDefault(),i.isSoft||(t.execute("enter"),e.scrollToTheSelection())},{priority:"low"})}}class Fd extends Rd{execute(){const t=this.editor.model,e=t.document;t.change(n=>{!function(t,e,n){const i=n.isCollapsed,o=n.getFirstRange(),r=o.start.parent,s=o.end.parent,a=r==s;if(i){const i=Ld(t.schema,n.getAttributes());Ud(e,o.end),e.removeSelectionAttribute(n.getAttributeKeys()),e.setSelectionAttribute(i)}else{const i=!(o.start.isAtStart&&o.end.isAtEnd);t.deleteContent(n,{leaveUnmerged:i}),a?Ud(e,n.focus):i&&e.setSelection(s,0)}}(t,n,e.selection),this.fire("afterExecute",{writer:n})})}refresh(){const t=this.editor.model,e=t.document;this.isEnabled=function(t,e){if(e.rangeCount>1)return!1;const n=e.anchor;if(!n||!t.checkChild(n,"softBreak"))return!1;const i=e.getFirstRange(),o=i.start.parent,r=i.end.parent;if((Hd(o,t)||Hd(r,t))&&o!==r)return!1;return!0}(t.schema,e.selection)}}function Ud(t,e){const n=t.createElement("softBreak");t.insert(n,e),t.setSelection(n,"after")}function Hd(t,e){return!t.is("rootElement")&&(e.isLimit(t)||Hd(t.parent,e))}class qd extends Md{static get pluginName(){return"ShiftEnter"}init(){const t=this.editor,e=t.model.schema,n=t.conversion,i=t.editing.view,o=i.document;e.register("softBreak",{allowWhere:"$text",isInline:!0}),n.for("upcast").elementToElement({model:"softBreak",view:"br"}),n.for("downcast").elementToElement({model:"softBreak",view:(t,e)=>e.createEmptyElement("br")}),i.addObserver(zd),t.commands.add("shiftEnter",new Fd(t)),this.listenTo(o,"enter",(e,n)=>{n.preventDefault(),n.isSoft&&(t.execute("shiftEnter"),i.scrollToTheSelection())},{priority:"low"})}}class Wd{constructor(t,e=20){this.model=t,this.size=0,this.limit=e,this.isLocked=!1,this._changeCallback=(t,e)=>{"transparent"!=e.type&&e!==this._batch&&this._reset(!0)},this._selectionChangeCallback=()=>{this._reset()},this.model.document.on("change",this._changeCallback),this.model.document.selection.on("change:range",this._selectionChangeCallback),this.model.document.selection.on("change:attribute",this._selectionChangeCallback)}get batch(){return this._batch||(this._batch=this.model.createBatch()),this._batch}input(t){this.size+=t,this.size>=this.limit&&this._reset(!0)}lock(){this.isLocked=!0}unlock(){this.isLocked=!1}destroy(){this.model.document.off("change",this._changeCallback),this.model.document.selection.off("change:range",this._selectionChangeCallback),this.model.document.selection.off("change:attribute",this._selectionChangeCallback)}_reset(t){this.isLocked&&!t||(this._batch=null,this.size=0)}}class Yd extends Rd{constructor(t,e){super(t),this._buffer=new Wd(t.model,e),this._batches=new WeakSet}get buffer(){return this._buffer}destroy(){super.destroy(),this._buffer.destroy()}execute(t={}){const e=this.editor.model,n=e.document,i=t.text||"",o=i.length,r=t.range||n.selection.getFirstRange(),s=t.resultRange;e.enqueueChange(this._buffer.batch,t=>{const a=r.isCollapsed;this._buffer.lock(),e.deleteContent(e.createSelection(r)),i&&e.insertContent(t.createText(i,n.selection.getAttributes()),r.start),s?t.setSelection(s):a&&t.setSelection(r.start.getShiftedBy(o)),this._buffer.unlock(),this._buffer.input(o),this._batches.add(this._buffer.batch)})}}function $d(t){let e=null;const n=t.model,i=t.editing.view,o=t.commands.get("input");function r(t){const r=n.document,a=i.document.isComposing,c=e&&e.isEqual(r.selection);e=null,o.isEnabled&&(function(t){if(t.ctrlKey)return!0;return Gd.includes(t.keyCode)}(t)||r.selection.isCollapsed||a&&229===t.keyCode||!a&&229===t.keyCode&&c||s())}function s(){const t=o.buffer;t.lock(),n.enqueueChange(t.batch,()=>{n.deleteContent(n.document.selection)}),t.unlock()}mo.isAndroid?i.document.on("beforeinput",(t,e)=>r(e),{priority:"lowest"}):i.document.on("keydown",(t,e)=>r(e),{priority:"lowest"}),i.document.on("compositionstart",(function(){const t=n.document,e=1!==t.selection.rangeCount||t.selection.getFirstRange().isFlat;if(t.selection.isCollapsed||e)return;s()}),{priority:"lowest"}),i.document.on("compositionend",()=>{e=n.createSelection(n.document.selection)},{priority:"lowest"})}const Gd=[ko("arrowUp"),ko("arrowRight"),ko("arrowDown"),ko("arrowLeft"),9,16,17,18,19,20,27,33,34,35,36,45,91,93,144,145,173,174,175,176,177,178,179,255];for(let t=112;t<=135;t++)Gd.push(t);function Qd(t){if(t.newChildren.length-t.oldChildren.length!=1)return;const e=function(t,e){const n=[];let i,o=0;return t.forEach(t=>{"equal"==t?(r(),o++):"insert"==t?(s("insert")?i.values.push(e[o]):(r(),i={type:"insert",index:o,values:[e[o]]}),o++):s("delete")?i.howMany++:(r(),i={type:"delete",index:o,howMany:1})}),r(),n;function r(){i&&(n.push(i),i=null)}function s(t){return i&&i.type==t}}(Qo(t.oldChildren,t.newChildren,Kd),t.newChildren);if(e.length>1)return;const n=e[0];return n.values[0]&&n.values[0].is("text")?n:void 0}function Kd(t,e){return t&&t.is("text")&&e&&e.is("text")?t.data===e.data:t===e}class Jd{constructor(t){this.editor=t,this.editing=this.editor.editing}handle(t,e){if(function(t){if(0==t.length)return!1;for(const e of t)if("children"===e.type&&!Qd(e))return!0;return!1}(t))this._handleContainerChildrenMutations(t,e);else for(const n of t)this._handleTextMutation(n,e),this._handleTextNodeInsertion(n)}_handleContainerChildrenMutations(t,e){const n=function(t){const e=t.map(t=>t.node).reduce((t,e)=>t.getCommonAncestor(e,{includeSelf:!0}));if(!e)return;return e.getAncestors({includeSelf:!0,parentFirst:!0}).find(t=>t.is("containerElement")||t.is("rootElement"))}(t);if(!n)return;const i=this.editor.editing.view.domConverter.mapViewToDom(n),o=new ar,r=this.editor.data.toModel(o.domToView(i)).getChild(0),s=this.editor.editing.mapper.toModelElement(n);if(!s)return;const a=Array.from(r.getChildren()),c=Array.from(s.getChildren()),l=a[a.length-1],d=c[c.length-1];l&&l.is("softBreak")&&d&&!d.is("softBreak")&&a.pop();const h=this.editor.model.schema;if(!Zd(a,h)||!Zd(c,h))return;const u=a.map(t=>t.is("text")?t.data:"@").join("").replace(/\u00A0/g," "),f=c.map(t=>t.is("text")?t.data:"@").join("").replace(/\u00A0/g," ");if(f===u)return;const g=Qo(f,u),{firstChangeAt:m,insertions:p,deletions:b}=Xd(g);let w=null;e&&(w=this.editing.mapper.toModelRange(e.getFirstRange()));const k=u.substr(m,p),_=this.editor.model.createRange(this.editor.model.createPositionAt(s,m),this.editor.model.createPositionAt(s,m+b));this.editor.execute("input",{text:k,range:_,resultRange:w})}_handleTextMutation(t,e){if("text"!=t.type)return;const n=t.newText.replace(/\u00A0/g," "),i=t.oldText.replace(/\u00A0/g," ");if(i===n)return;const o=Qo(i,n),{firstChangeAt:r,insertions:s,deletions:a}=Xd(o);let c=null;e&&(c=this.editing.mapper.toModelRange(e.getFirstRange()));const l=this.editing.view.createPositionAt(t.node,r),d=this.editing.mapper.toModelPosition(l),h=this.editor.model.createRange(d,d.getShiftedBy(a)),u=n.substr(r,s);this.editor.execute("input",{text:u,range:h,resultRange:c})}_handleTextNodeInsertion(t){if("children"!=t.type)return;const e=Qd(t),n=this.editing.view.createPositionAt(t.node,e.index),i=this.editing.mapper.toModelPosition(n),o=e.values[0].data;this.editor.execute("input",{text:o.replace(/\u00A0/g," "),range:this.editor.model.createRange(i)})}}function Zd(t,e){return t.every(t=>e.isInline(t))}function Xd(t){let e=null,n=null;for(let i=0;i{new Jd(t).handle(n,i)})}(t)}isInput(t){return this.editor.commands.get("input")._batches.has(t)}}class eh extends Rd{constructor(t,e){super(t),this.direction=e,this._buffer=new Wd(t.model,t.config.get("typing.undoStep"))}get buffer(){return this._buffer}execute(t={}){const e=this.editor.model,n=e.document;e.enqueueChange(this._buffer.batch,i=>{this._buffer.lock();const o=i.createSelection(t.selection||n.selection),r=o.isCollapsed;if(o.isCollapsed&&e.modifySelection(o,{direction:this.direction,unit:t.unit}),this._shouldEntireContentBeReplacedWithParagraph(t.sequence||1))return void this._replaceEntireContentWithParagraph(i);if(o.isCollapsed)return;let s=0;o.getFirstRange().getMinimalFlatRanges().forEach(t=>{s+=no(t.getWalker({singleCharacters:!0,ignoreElementEnd:!0,shallow:!0}))}),e.deleteContent(o,{doNotResetEntireContent:r}),this._buffer.input(s),i.setSelection(o),this._buffer.unlock()})}_shouldEntireContentBeReplacedWithParagraph(t){if(t>1)return!1;const e=this.editor.model,n=e.document.selection,i=e.schema.getLimitElement(n);if(!(n.isCollapsed&&n.containsEntireContent(i)))return!1;if(!e.schema.checkChild(i,"paragraph"))return!1;const o=i.getChild(0);return!o||"paragraph"!==o.name}_replaceEntireContentWithParagraph(t){const e=this.editor.model,n=e.document.selection,i=e.schema.getLimitElement(n),o=t.createElement("paragraph");t.remove(t.createRangeIn(i)),t.insert(o,i),t.setSelection(o,0)}}class nh extends mr{constructor(t){super(t);const e=t.document;let n=0;function i(t,n,i){let o;e.once("delete",t=>o=t,{priority:Number.POSITIVE_INFINITY}),e.fire("delete",new ns(e,n,i)),o&&o.stop.called&&t.stop()}e.on("keyup",(t,e)=>{e.keyCode!=wo.delete&&e.keyCode!=wo.backspace||(n=0)}),e.on("keydown",(t,e)=>{const o={};if(e.keyCode==wo.delete)o.direction="forward",o.unit="character";else{if(e.keyCode!=wo.backspace)return;o.direction="backward",o.unit="codePoint"}const r=mo.isMac?e.altKey:e.ctrlKey;o.unit=r?"word":o.unit,o.sequence=++n,i(t,e.domEvent,o)}),mo.isAndroid&&e.on("beforeinput",(e,n)=>{if("deleteContentBackward"!=n.domEvent.inputType)return;const o={unit:"codepoint",direction:"backward",sequence:1},r=n.domTarget.ownerDocument.defaultView.getSelection();r.anchorNode==r.focusNode&&r.anchorOffset+1!=r.focusOffset&&(o.selectionToRemove=t.domConverter.domSelectionToView(r)),i(e,n.domEvent,o)})}observe(){}}class ih extends Md{static get pluginName(){return"Delete"}init(){const t=this.editor,e=t.editing.view,n=e.document;if(e.addObserver(nh),t.commands.add("forwardDelete",new eh(t,"forward")),t.commands.add("delete",new eh(t,"backward")),this.listenTo(n,"delete",(n,i)=>{const o={unit:i.unit,sequence:i.sequence};if(i.selectionToRemove){const e=t.model.createSelection(),n=[];for(const e of i.selectionToRemove.getRanges())n.push(t.editing.mapper.toModelRange(e));e.setTo(n),o.selection=e}t.execute("forward"==i.direction?"forwardDelete":"delete",o),i.preventDefault(),e.scrollToTheSelection()}),mo.isAndroid){let t=null;this.listenTo(n,"delete",(e,n)=>{const i=n.domTarget.ownerDocument.defaultView.getSelection();t={anchorNode:i.anchorNode,anchorOffset:i.anchorOffset,focusNode:i.focusNode,focusOffset:i.focusOffset}},{priority:"lowest"}),this.listenTo(n,"keyup",(e,n)=>{if(t){const e=n.domTarget.ownerDocument.defaultView.getSelection();e.collapse(t.anchorNode,t.anchorOffset),e.extend(t.focusNode,t.focusOffset),t=null}})}}}class oh extends Md{static get requires(){return[th,ih]}static get pluginName(){return"Typing"}}class rh extends oc{get type(){return"noop"}clone(){return new rh(this.baseVersion)}getReversed(){return new rh(this.baseVersion+1)}_execute(){}static get className(){return"NoOperation"}}const sh=new Map;function ah(t,e,n){let i=sh.get(t);i||(i=new Map,sh.set(t,i)),i.set(e,n)}function ch(t){return[t]}function lh(t,e,n={}){const i=function(t,e){const n=sh.get(t);return n&&n.has(e)?n.get(e):ch}(t.constructor,e.constructor);try{return i(t=t.clone(),e,n)}catch(t){throw t}}function dh(t,e,n){t=t.slice(),e=e.slice();const i=new hh(n.document,n.useRelations,n.forceWeakRemove);i.setOriginalOperations(t),i.setOriginalOperations(e);const o=i.originalOperations;if(0==t.length||0==e.length)return{operationsA:t,operationsB:e,originalOperations:o};const r=new WeakMap;for(const e of t)r.set(e,0);const s={nextBaseVersionA:t[t.length-1].baseVersion+1,nextBaseVersionB:e[e.length-1].baseVersion+1,originalOperationsACount:t.length,originalOperationsBCount:e.length};let a=0;for(;a{if(t.key===e.key){const i=t.range.getDifference(e.range).map(e=>new gc(e,t.key,t.oldValue,t.newValue,0)),o=t.range.getIntersection(e.range);return o&&n.aIsStrong&&i.push(new gc(o,e.key,e.newValue,t.newValue,0)),0==i.length?[new rh(0)]:i}return[t]}),ah(gc,bc,(t,e)=>{if(t.range.start.hasSameParentAs(e.position)&&t.range.containsPosition(e.position)){const n=t.range._getTransformedByInsertion(e.position,e.howMany,!e.shouldReceiveAttributes).map(e=>new gc(e,t.key,t.oldValue,t.newValue,t.baseVersion));if(e.shouldReceiveAttributes){const i=gh(e,t.key,t.oldValue);i&&n.unshift(i)}return n}return t.range=t.range._getTransformedByInsertion(e.position,e.howMany,!1)[0],[t]}),ah(gc,vc,(t,e)=>{const n=[];t.range.start.hasSameParentAs(e.deletionPosition)&&(t.range.containsPosition(e.deletionPosition)||t.range.start.isEqual(e.deletionPosition))&&n.push(Js._createFromPositionAndShift(e.graveyardPosition,1));const i=t.range._getTransformedByMergeOperation(e);return i.isCollapsed||n.push(i),n.map(e=>new gc(e,t.key,t.oldValue,t.newValue,t.baseVersion))}),ah(gc,pc,(t,e)=>{return function(t,e){const n=Js._createFromPositionAndShift(e.sourcePosition,e.howMany);let i=null,o=[];n.containsRange(t,!0)?i=t:t.start.hasSameParentAs(n.start)?(o=t.getDifference(n),i=t.getIntersection(n)):o=[t];const r=[];for(let t of o){t=t._getTransformedByDeletion(e.sourcePosition,e.howMany);const n=e.getMovedRangeStart(),i=t.start.hasSameParentAs(n);t=t._getTransformedByInsertion(n,e.howMany,i),r.push(...t)}i&&r.push(i._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany,!1)[0]);return r}(t.range,e).map(e=>new gc(e,t.key,t.oldValue,t.newValue,t.baseVersion))}),ah(gc,yc,(t,e)=>{if(t.range.end.isEqual(e.insertionPosition))return e.graveyardPosition||t.range.end.offset++,[t];if(t.range.start.hasSameParentAs(e.splitPosition)&&t.range.containsPosition(e.splitPosition)){const n=t.clone();return n.range=new Js(e.moveTargetPosition.clone(),t.range.end._getCombined(e.splitPosition,e.moveTargetPosition)),t.range.end=e.splitPosition.clone(),t.range.end.stickiness="toPrevious",[t,n]}return t.range=t.range._getTransformedBySplitOperation(e),[t]}),ah(bc,gc,(t,e)=>{const n=[t];if(t.shouldReceiveAttributes&&t.position.hasSameParentAs(e.range.start)&&e.range.containsPosition(t.position)){const i=gh(t,e.key,e.newValue);i&&n.push(i)}return n}),ah(bc,bc,(t,e,n)=>t.position.isEqual(e.position)&&n.aIsStrong?[t]:(t.position=t.position._getTransformedByInsertOperation(e),[t])),ah(bc,pc,(t,e)=>(t.position=t.position._getTransformedByMoveOperation(e),[t])),ah(bc,yc,(t,e)=>(t.position=t.position._getTransformedBySplitOperation(e),[t])),ah(bc,vc,(t,e)=>(t.position=t.position._getTransformedByMergeOperation(e),[t])),ah(wc,bc,(t,e)=>(t.oldRange&&(t.oldRange=t.oldRange._getTransformedByInsertOperation(e)[0]),t.newRange&&(t.newRange=t.newRange._getTransformedByInsertOperation(e)[0]),[t])),ah(wc,wc,(t,e,n)=>{if(t.name==e.name){if(!n.aIsStrong)return[new rh(0)];t.oldRange=e.newRange?e.newRange.clone():null}return[t]}),ah(wc,vc,(t,e)=>(t.oldRange&&(t.oldRange=t.oldRange._getTransformedByMergeOperation(e)),t.newRange&&(t.newRange=t.newRange._getTransformedByMergeOperation(e)),[t])),ah(wc,pc,(t,e,n)=>{if(t.oldRange&&(t.oldRange=Js._createFromRanges(t.oldRange._getTransformedByMoveOperation(e))),t.newRange){if(n.abRelation){const i=Js._createFromRanges(t.newRange._getTransformedByMoveOperation(e));if("left"==n.abRelation.side&&e.targetPosition.isEqual(t.newRange.start))return t.newRange.start.path=n.abRelation.path,t.newRange.end=i.end,[t];if("right"==n.abRelation.side&&e.targetPosition.isEqual(t.newRange.end))return t.newRange.start=i.start,t.newRange.end.path=n.abRelation.path,[t]}t.newRange=Js._createFromRanges(t.newRange._getTransformedByMoveOperation(e))}return[t]}),ah(wc,yc,(t,e,n)=>{if(t.oldRange&&(t.oldRange=t.oldRange._getTransformedBySplitOperation(e)),t.newRange){if(n.abRelation){const i=t.newRange._getTransformedBySplitOperation(e);return t.newRange.start.isEqual(e.splitPosition)&&n.abRelation.wasStartBeforeMergedElement?t.newRange.start=Ks._createAt(e.insertionPosition):t.newRange.start.isEqual(e.splitPosition)&&!n.abRelation.wasInLeftElement&&(t.newRange.start=Ks._createAt(e.moveTargetPosition)),t.newRange.end.isEqual(e.splitPosition)&&n.abRelation.wasInRightElement?t.newRange.end=Ks._createAt(e.moveTargetPosition):t.newRange.end.isEqual(e.splitPosition)&&n.abRelation.wasEndBeforeMergedElement?t.newRange.end=Ks._createAt(e.insertionPosition):t.newRange.end=i.end,[t]}t.newRange=t.newRange._getTransformedBySplitOperation(e)}return[t]}),ah(vc,bc,(t,e)=>(t.sourcePosition.hasSameParentAs(e.position)&&(t.howMany+=e.howMany),t.sourcePosition=t.sourcePosition._getTransformedByInsertOperation(e),t.targetPosition=t.targetPosition._getTransformedByInsertOperation(e),[t])),ah(vc,vc,(t,e,n)=>{if(t.sourcePosition.isEqual(e.sourcePosition)&&t.targetPosition.isEqual(e.targetPosition)){if(n.bWasUndone){const n=e.graveyardPosition.path.slice();return n.push(0),t.sourcePosition=new Ks(e.graveyardPosition.root,n),t.howMany=0,[t]}return[new rh(0)]}if(t.sourcePosition.isEqual(e.sourcePosition)&&!t.targetPosition.isEqual(e.targetPosition)&&!n.bWasUndone&&"splitAtSource"!=n.abRelation){const i="$graveyard"==t.targetPosition.root.rootName,o="$graveyard"==e.targetPosition.root.rootName,r=i&&!o;if(o&&!i||!r&&n.aIsStrong){const n=e.targetPosition._getTransformedByMergeOperation(e),i=t.targetPosition._getTransformedByMergeOperation(e);return[new pc(n,t.howMany,i,0)]}return[new rh(0)]}return t.sourcePosition.hasSameParentAs(e.targetPosition)&&(t.howMany+=e.howMany),t.sourcePosition=t.sourcePosition._getTransformedByMergeOperation(e),t.targetPosition=t.targetPosition._getTransformedByMergeOperation(e),t.graveyardPosition.isEqual(e.graveyardPosition)&&n.aIsStrong||(t.graveyardPosition=t.graveyardPosition._getTransformedByMergeOperation(e)),[t]}),ah(vc,pc,(t,e,n)=>{const i=Js._createFromPositionAndShift(e.sourcePosition,e.howMany);return"remove"==e.type&&!n.bWasUndone&&!n.forceWeakRemove&&t.deletionPosition.hasSameParentAs(e.sourcePosition)&&i.containsPosition(t.sourcePosition)?[new rh(0)]:(t.sourcePosition.hasSameParentAs(e.targetPosition)&&(t.howMany+=e.howMany),t.sourcePosition.hasSameParentAs(e.sourcePosition)&&(t.howMany-=e.howMany),t.sourcePosition=t.sourcePosition._getTransformedByMoveOperation(e),t.targetPosition=t.targetPosition._getTransformedByMoveOperation(e),t.graveyardPosition.isEqual(e.targetPosition)||(t.graveyardPosition=t.graveyardPosition._getTransformedByMoveOperation(e)),[t])}),ah(vc,yc,(t,e,n)=>{if(e.graveyardPosition&&(t.graveyardPosition=t.graveyardPosition._getTransformedByDeletion(e.graveyardPosition,1),t.deletionPosition.isEqual(e.graveyardPosition)&&(t.howMany=e.howMany)),t.targetPosition.isEqual(e.splitPosition)){const i=0!=e.howMany,o=e.graveyardPosition&&t.deletionPosition.isEqual(e.graveyardPosition);if(i||o||"mergeTargetNotMoved"==n.abRelation)return t.sourcePosition=t.sourcePosition._getTransformedBySplitOperation(e),[t]}if(t.sourcePosition.isEqual(e.splitPosition)){if("mergeSourceNotMoved"==n.abRelation)return t.howMany=0,t.targetPosition=t.targetPosition._getTransformedBySplitOperation(e),[t];if("mergeSameElement"==n.abRelation||t.sourcePosition.offset>0)return t.sourcePosition=e.moveTargetPosition.clone(),t.targetPosition=t.targetPosition._getTransformedBySplitOperation(e),[t]}return t.sourcePosition.hasSameParentAs(e.splitPosition)&&(t.howMany=e.splitPosition.offset),t.sourcePosition=t.sourcePosition._getTransformedBySplitOperation(e),t.targetPosition=t.targetPosition._getTransformedBySplitOperation(e),[t]}),ah(pc,bc,(t,e)=>{const n=Js._createFromPositionAndShift(t.sourcePosition,t.howMany)._getTransformedByInsertOperation(e,!1)[0];return t.sourcePosition=n.start,t.howMany=n.end.offset-n.start.offset,t.targetPosition.isEqual(e.position)||(t.targetPosition=t.targetPosition._getTransformedByInsertOperation(e)),[t]}),ah(pc,pc,(t,e,n)=>{const i=Js._createFromPositionAndShift(t.sourcePosition,t.howMany),o=Js._createFromPositionAndShift(e.sourcePosition,e.howMany);let r,s=n.aIsStrong,a=!n.aIsStrong;if("insertBefore"==n.abRelation||"insertAfter"==n.baRelation?a=!0:"insertAfter"!=n.abRelation&&"insertBefore"!=n.baRelation||(a=!1),r=t.targetPosition.isEqual(e.targetPosition)&&a?t.targetPosition._getTransformedByDeletion(e.sourcePosition,e.howMany):t.targetPosition._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany),mh(t,e)&&mh(e,t))return[e.getReversed()];if(i.containsPosition(e.targetPosition)&&i.containsRange(o,!0))return i.start=i.start._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany),i.end=i.end._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany),ph([i],r);if(o.containsPosition(t.targetPosition)&&o.containsRange(i,!0))return i.start=i.start._getCombined(e.sourcePosition,e.getMovedRangeStart()),i.end=i.end._getCombined(e.sourcePosition,e.getMovedRangeStart()),ph([i],r);const c=di(t.sourcePosition.getParentPath(),e.sourcePosition.getParentPath());if("prefix"==c||"extension"==c)return i.start=i.start._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany),i.end=i.end._getTransformedByMove(e.sourcePosition,e.targetPosition,e.howMany),ph([i],r);"remove"!=t.type||"remove"==e.type||n.aWasUndone||n.forceWeakRemove?"remove"==t.type||"remove"!=e.type||n.bWasUndone||n.forceWeakRemove||(s=!1):s=!0;const l=[],d=i.getDifference(o);for(const t of d){t.start=t.start._getTransformedByDeletion(e.sourcePosition,e.howMany),t.end=t.end._getTransformedByDeletion(e.sourcePosition,e.howMany);const n="same"==di(t.start.getParentPath(),e.getMovedRangeStart().getParentPath()),i=t._getTransformedByInsertion(e.getMovedRangeStart(),e.howMany,n);l.push(...i)}const h=i.getIntersection(o);return null!==h&&s&&(h.start=h.start._getCombined(e.sourcePosition,e.getMovedRangeStart()),h.end=h.end._getCombined(e.sourcePosition,e.getMovedRangeStart()),0===l.length?l.push(h):1==l.length?o.start.isBefore(i.start)||o.start.isEqual(i.start)?l.unshift(h):l.push(h):l.splice(1,0,h)),0===l.length?[new rh(t.baseVersion)]:ph(l,r)}),ah(pc,yc,(t,e,n)=>{let i=t.targetPosition.clone();t.targetPosition.isEqual(e.insertionPosition)&&e.graveyardPosition&&"moveTargetAfter"!=n.abRelation||(i=t.targetPosition._getTransformedBySplitOperation(e));const o=Js._createFromPositionAndShift(t.sourcePosition,t.howMany);if(o.end.isEqual(e.insertionPosition))return e.graveyardPosition||t.howMany++,t.targetPosition=i,[t];if(o.start.hasSameParentAs(e.splitPosition)&&o.containsPosition(e.splitPosition)){let t=new Js(e.splitPosition,o.end);return t=t._getTransformedBySplitOperation(e),ph([new Js(o.start,e.splitPosition),t],i)}t.targetPosition.isEqual(e.splitPosition)&&"insertAtSource"==n.abRelation&&(i=e.moveTargetPosition),t.targetPosition.isEqual(e.insertionPosition)&&"insertBetween"==n.abRelation&&(i=t.targetPosition);const r=[o._getTransformedBySplitOperation(e)];if(e.graveyardPosition){const i=o.start.isEqual(e.graveyardPosition)||o.containsPosition(e.graveyardPosition);t.howMany>1&&i&&!n.aWasUndone&&r.push(Js._createFromPositionAndShift(e.insertionPosition,1))}return ph(r,i)}),ah(pc,vc,(t,e,n)=>{const i=Js._createFromPositionAndShift(t.sourcePosition,t.howMany);if(e.deletionPosition.hasSameParentAs(t.sourcePosition)&&i.containsPosition(e.sourcePosition))if("remove"!=t.type||n.forceWeakRemove){if(1==t.howMany)return n.bWasUndone?(t.sourcePosition=e.graveyardPosition.clone(),t.targetPosition=t.targetPosition._getTransformedByMergeOperation(e),[t]):[new rh(0)]}else if(!n.aWasUndone){const n=[];let i=e.graveyardPosition.clone(),o=e.targetPosition._getTransformedByMergeOperation(e);t.howMany>1&&(n.push(new pc(t.sourcePosition,t.howMany-1,t.targetPosition,0)),i=i._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany-1),o=o._getTransformedByMove(t.sourcePosition,t.targetPosition,t.howMany-1));const r=e.deletionPosition._getCombined(t.sourcePosition,t.targetPosition),s=new pc(i,1,r,0),a=s.getMovedRangeStart().path.slice();a.push(0);const c=new Ks(s.targetPosition.root,a);o=o._getTransformedByMove(i,r,1);const l=new pc(o,e.howMany,c,0);return n.push(s),n.push(l),n}const o=Js._createFromPositionAndShift(t.sourcePosition,t.howMany)._getTransformedByMergeOperation(e);return t.sourcePosition=o.start,t.howMany=o.end.offset-o.start.offset,t.targetPosition=t.targetPosition._getTransformedByMergeOperation(e),[t]}),ah(kc,bc,(t,e)=>(t.position=t.position._getTransformedByInsertOperation(e),[t])),ah(kc,vc,(t,e)=>t.position.isEqual(e.deletionPosition)?(t.position=e.graveyardPosition.clone(),t.position.stickiness="toNext",[t]):(t.position=t.position._getTransformedByMergeOperation(e),[t])),ah(kc,pc,(t,e)=>(t.position=t.position._getTransformedByMoveOperation(e),[t])),ah(kc,kc,(t,e,n)=>{if(t.position.isEqual(e.position)){if(!n.aIsStrong)return[new rh(0)];t.oldName=e.newName}return[t]}),ah(kc,yc,(t,e)=>{if("same"==di(t.position.path,e.splitPosition.getParentPath())&&!e.graveyardPosition){const e=new kc(t.position.getShiftedBy(1),t.oldName,t.newName,0);return[t,e]}return t.position=t.position._getTransformedBySplitOperation(e),[t]}),ah(_c,_c,(t,e,n)=>{if(t.root===e.root&&t.key===e.key){if(!n.aIsStrong||t.newValue===e.newValue)return[new rh(0)];t.oldValue=e.newValue}return[t]}),ah(yc,bc,(t,e)=>(t.splitPosition.hasSameParentAs(e.position)&&t.splitPosition.offset{if(!t.graveyardPosition&&!n.bWasUndone&&t.splitPosition.hasSameParentAs(e.sourcePosition)){const n=e.graveyardPosition.path.slice();n.push(0);const i=new Ks(e.graveyardPosition.root,n),o=yc.getInsertionPosition(new Ks(e.graveyardPosition.root,n)),r=new yc(i,0,null,0);return r.insertionPosition=o,t.splitPosition=t.splitPosition._getTransformedByMergeOperation(e),t.insertionPosition=yc.getInsertionPosition(t.splitPosition),t.graveyardPosition=r.insertionPosition.clone(),t.graveyardPosition.stickiness="toNext",[r,t]}return t.splitPosition.hasSameParentAs(e.deletionPosition)&&!t.splitPosition.isAfter(e.deletionPosition)&&t.howMany--,t.splitPosition.hasSameParentAs(e.targetPosition)&&(t.howMany+=e.howMany),t.splitPosition=t.splitPosition._getTransformedByMergeOperation(e),t.insertionPosition=yc.getInsertionPosition(t.splitPosition),t.graveyardPosition&&(t.graveyardPosition=t.graveyardPosition._getTransformedByMergeOperation(e)),[t]}),ah(yc,pc,(t,e,n)=>{const i=Js._createFromPositionAndShift(e.sourcePosition,e.howMany);if(t.graveyardPosition){const o=i.start.isEqual(t.graveyardPosition)||i.containsPosition(t.graveyardPosition);if(!n.bWasUndone&&o){const n=t.splitPosition._getTransformedByMoveOperation(e),i=t.graveyardPosition._getTransformedByMoveOperation(e),o=i.path.slice();o.push(0);const r=new Ks(i.root,o);return[new pc(n,t.howMany,r,0)]}t.graveyardPosition=t.graveyardPosition._getTransformedByMoveOperation(e)}if(t.splitPosition.hasSameParentAs(e.sourcePosition)&&i.containsPosition(t.splitPosition)){const n=e.howMany-(t.splitPosition.offset-e.sourcePosition.offset);return t.howMany-=n,t.splitPosition.hasSameParentAs(e.targetPosition)&&t.splitPosition.offset{if(t.splitPosition.isEqual(e.splitPosition)){if(!t.graveyardPosition&&!e.graveyardPosition)return[new rh(0)];if(t.graveyardPosition&&e.graveyardPosition&&t.graveyardPosition.isEqual(e.graveyardPosition))return[new rh(0)];if("splitBefore"==n.abRelation)return t.howMany=0,t.graveyardPosition=t.graveyardPosition._getTransformedBySplitOperation(e),[t]}if(t.graveyardPosition&&e.graveyardPosition&&t.graveyardPosition.isEqual(e.graveyardPosition)){const i="$graveyard"==t.splitPosition.root.rootName,o="$graveyard"==e.splitPosition.root.rootName,r=i&&!o;if(o&&!i||!r&&n.aIsStrong){const n=[];return e.howMany&&n.push(new pc(e.moveTargetPosition,e.howMany,e.splitPosition,0)),t.howMany&&n.push(new pc(t.splitPosition,t.howMany,t.moveTargetPosition,0)),n}return[new rh(0)]}if(t.graveyardPosition&&(t.graveyardPosition=t.graveyardPosition._getTransformedBySplitOperation(e)),t.splitPosition.isEqual(e.insertionPosition)&&"splitBefore"==n.abRelation)return t.howMany++,[t];if(e.splitPosition.isEqual(t.insertionPosition)&&"splitBefore"==n.baRelation){const n=e.insertionPosition.path.slice();n.push(0);const i=new Ks(e.insertionPosition.root,n);return[t,new pc(t.insertionPosition,1,i,0)]}return t.splitPosition.hasSameParentAs(e.splitPosition)&&t.splitPosition.offset0}addBatch(t){const e=this.editor.model.document.selection,n={ranges:e.hasOwnRange?Array.from(e.getRanges()):[],isBackward:e.isBackward};this._stack.push({batch:t,selection:n}),this.refresh()}clearStack(){this._stack=[],this.refresh()}_restoreSelection(t,e,n){const i=this.editor.model,o=i.document,r=[];for(const e of t){const t=wh(e,n).find(t=>t.start.root!=o.graveyard);t&&r.push(t)}r.length&&i.change(t=>{t.setSelection(r,{backward:e})})}_undo(t,e){const n=this.editor.model,i=n.document;this._createdBatches.add(e);const o=t.operations.slice().filter(t=>t.isDocumentOperation);o.reverse();for(const t of o){const o=t.baseVersion+1,r=Array.from(i.history.getOperations(o)),s=dh([t.getReversed()],r,{useRelations:!0,document:this.editor.model.document,padWithNoOps:!1,forceWeakRemove:!0}).operationsA;for(const o of s)e.addOperation(o),n.applyOperation(o),i.history.setOperationAsUndone(t,o)}}}function wh(t,e){const n=t.getTransformedByOperations(e);n.sort((t,e)=>t.start.isBefore(e.start)?-1:1);for(let t=1;te.batch==t):this._stack.length-1,n=this._stack.splice(e,1)[0],i=this.editor.model.createBatch("transparent");this.editor.model.enqueueChange(i,()=>{this._undo(n.batch,i);const t=this.editor.model.document.history.getOperations(n.batch.baseVersion);this._restoreSelection(n.selection.ranges,n.selection.isBackward,t),this.fire("revert",n.batch,i)}),this.refresh()}}class _h extends bh{execute(){const t=this._stack.pop(),e=this.editor.model.createBatch("transparent");this.editor.model.enqueueChange(e,()=>{const n=t.batch.operations[t.batch.operations.length-1].baseVersion+1,i=this.editor.model.document.history.getOperations(n);this._restoreSelection(t.selection.ranges,t.selection.isBackward,i),this._undo(t.batch,e)}),this.refresh()}}class vh extends Md{static get pluginName(){return"UndoEditing"}constructor(t){super(t),this._batchRegistry=new WeakSet}init(){const t=this.editor;this._undoCommand=new kh(t),this._redoCommand=new _h(t),t.commands.add("undo",this._undoCommand),t.commands.add("redo",this._redoCommand),this.listenTo(t.model,"applyOperation",(t,e)=>{const n=e[0];if(!n.isDocumentOperation)return;const i=n.batch,o=this._redoCommand._createdBatches.has(i),r=this._undoCommand._createdBatches.has(i);this._batchRegistry.has(i)||"transparent"==i.type&&!o&&!r||(o?this._undoCommand.addBatch(i):r||(this._undoCommand.addBatch(i),this._redoCommand.clearStack()),this._batchRegistry.add(i))},{priority:"highest"}),this.listenTo(this._undoCommand,"revert",(t,e,n)=>{this._redoCommand.addBatch(n)}),t.keystrokes.set("CTRL+Z","undo"),t.keystrokes.set("CTRL+Y","redo"),t.keystrokes.set("CTRL+SHIFT+Z","redo")}}var yh='',xh='';class Ah extends Md{init(){const t=this.editor,e=t.locale,n=t.t,i="ltr"==e.uiLanguageDirection?yh:xh,o="ltr"==e.uiLanguageDirection?xh:yh;this._addButton("undo",n("bi"),"CTRL+Z",i),this._addButton("redo",n("bj"),"CTRL+Y",o)}_addButton(t,e,n,i){const o=this.editor;o.ui.componentFactory.add(t,r=>{const s=o.commands.get(t),a=new ud(r);return a.set({label:e,icon:i,keystroke:n,tooltip:!0}),a.bind("isEnabled").to(s,"isEnabled"),this.listenTo(a,"execute",()=>o.execute(t)),a})}}class Th extends Md{static get requires(){return[vh,Ah]}static get pluginName(){return"Undo"}}class Ch extends Md{static get pluginName(){return"PendingActions"}init(){this.set("hasAny",!1),this._actions=new ro({idProperty:"_id"}),this._actions.delegate("add","remove").to(this)}add(t){if("string"!=typeof t)throw new Qn.b("pendingactions-add-invalid-message: The message must be a string.",this);const e=Object.create(Ui);return e.set("message",t),this._actions.add(e),this.hasAny=!0,e}remove(t){this._actions.remove(t),this.hasAny=!!this._actions.length}get first(){return this._actions.get(0)}[Symbol.iterator](){return this._actions[Symbol.iterator]()}}class Ph{constructor(){const t=new window.FileReader;this._reader=t,this._data=void 0,this.set("loaded",0),t.onprogress=t=>{this.loaded=t.loaded}}get error(){return this._reader.error}get data(){return this._data}read(t){const e=this._reader;return this.total=t.size,new Promise((n,i)=>{e.onload=()=>{const t=e.result;this._data=t,n(t)},e.onerror=()=>{i("error")},e.onabort=()=>{i("aborted")},this._reader.readAsDataURL(t)})}abort(){this._reader.abort()}}li(Ph,Ui);class Sh extends Md{static get pluginName(){return"FileRepository"}static get requires(){return[Ch]}init(){this.loaders=new ro,this.loaders.on("add",()=>this._updatePendingAction()),this.loaders.on("remove",()=>this._updatePendingAction()),this._loadersMap=new Map,this._pendingAction=null,this.set("uploaded",0),this.set("uploadTotal",null),this.bind("uploadedPercent").to(this,"uploaded",this,"uploadTotal",(t,e)=>e?t/e*100:0)}getLoader(t){return this._loadersMap.get(t)||null}createLoader(t){if(!this.createUploadAdapter)return console.warn(Object(Qn.a)("filerepository-no-upload-adapter: Upload adapter is not defined.")),null;const e=new Mh(Promise.resolve(t),this.createUploadAdapter);return this.loaders.add(e),this._loadersMap.set(t,e),t instanceof Promise&&e.file.then(t=>{this._loadersMap.set(t,e)}).catch(()=>{}),e.on("change:uploaded",()=>{let t=0;for(const e of this.loaders)t+=e.uploaded;this.uploaded=t}),e.on("change:uploadTotal",()=>{let t=0;for(const e of this.loaders)e.uploadTotal&&(t+=e.uploadTotal);this.uploadTotal=t}),e}destroyLoader(t){const e=t instanceof Mh?t:this.getLoader(t);e._destroy(),this.loaders.remove(e),this._loadersMap.forEach((t,n)=>{t===e&&this._loadersMap.delete(n)})}_updatePendingAction(){const t=this.editor.plugins.get(Ch);if(this.loaders.length){if(!this._pendingAction){const e=this.editor.t,n=t=>`${e("av")} ${parseInt(t)}%.`;this._pendingAction=t.add(n(this.uploadedPercent)),this._pendingAction.bind("message").to(this,"uploadedPercent",n)}}else t.remove(this._pendingAction),this._pendingAction=null}}li(Sh,Ui);class Mh{constructor(t,e){this.id=Zn(),this._filePromiseWrapper=this._createFilePromiseWrapper(t),this._adapter=e(this),this._reader=new Ph,this.set("status","idle"),this.set("uploaded",0),this.set("uploadTotal",null),this.bind("uploadedPercent").to(this,"uploaded",this,"uploadTotal",(t,e)=>e?t/e*100:0),this.set("uploadResponse",null)}get file(){return this._filePromiseWrapper?this._filePromiseWrapper.promise.then(t=>this._filePromiseWrapper?t:null):Promise.resolve(null)}get data(){return this._reader.data}read(){if("idle"!=this.status)throw new Qn.b("filerepository-read-wrong-status: You cannot call read if the status is different than idle.",this);return this.status="reading",this.file.then(t=>this._reader.read(t)).then(t=>{if("reading"!==this.status)throw this.status;return this.status="idle",t}).catch(t=>{if("aborted"===t)throw this.status="aborted","aborted";throw this.status="error",this._reader.error?this._reader.error:t})}upload(){if("idle"!=this.status)throw new Qn.b("filerepository-upload-wrong-status: You cannot call upload if the status is different than idle.",this);return this.status="uploading",this.file.then(()=>this._adapter.upload()).then(t=>(this.uploadResponse=t,this.status="idle",t)).catch(t=>{if("aborted"===this.status)throw"aborted";throw this.status="error",t})}abort(){const t=this.status;this.status="aborted",this._filePromiseWrapper.isFulfilled?"reading"==t?this._reader.abort():"uploading"==t&&this._adapter.abort&&this._adapter.abort():(this._filePromiseWrapper.promise.catch(()=>{}),this._filePromiseWrapper.rejecter("aborted")),this._destroy()}_destroy(){this._filePromiseWrapper=void 0,this._reader=void 0,this._adapter=void 0,this.uploadResponse=void 0}_createFilePromiseWrapper(t){const e={};return e.promise=new Promise((n,i)=>{e.rejecter=i,e.isFulfilled=!1,t.then(t=>{e.isFulfilled=!0,n(t)}).catch(t=>{e.isFulfilled=!0,i(t)})}),e}}li(Mh,Ui);const Eh="ckCsrfToken",Ih=40,Nh="abcdefghijklmnopqrstuvwxyz0123456789";function Oh(){let t=function(t){t=t.toLowerCase();const e=document.cookie.split(";");for(const n of e){const e=n.split("=");if(decodeURIComponent(e[0].trim().toLowerCase())===t)return decodeURIComponent(e[1])}return null}(Eh);var e,n;return t&&t.length==Ih||(t=function(t){let e="";const n=new Uint8Array(t);window.crypto.getRandomValues(n);for(let t=0;t.5?i.toUpperCase():i}return e}(Ih),e=Eh,n=t,document.cookie=encodeURIComponent(e)+"="+encodeURIComponent(n)+";path=/"),t}class Rh extends Md{static get requires(){return[Sh]}static get pluginName(){return"CKFinderUploadAdapter"}init(){const t=this.editor.config.get("ckfinder.uploadUrl");t&&(this.editor.plugins.get(Sh).createUploadAdapter=e=>new Dh(e,t,this.editor.t))}}class Dh{constructor(t,e,n){this.loader=t,this.url=e,this.t=n}upload(){return this.loader.file.then(t=>new Promise((e,n)=>{this._initRequest(),this._initListeners(e,n,t),this._sendRequest(t)}))}abort(){this.xhr&&this.xhr.abort()}_initRequest(){const t=this.xhr=new XMLHttpRequest;t.open("POST",this.url,!0),t.responseType="json"}_initListeners(t,e,n){const i=this.xhr,o=this.loader,r=(0,this.t)("a")+` ${n.name}.`;i.addEventListener("error",()=>e(r)),i.addEventListener("abort",()=>e()),i.addEventListener("load",()=>{const n=i.response;if(!n||!n.uploaded)return e(n&&n.error&&n.error.message?n.error.message:r);t({default:n.url})}),i.upload&&i.upload.addEventListener("progress",t=>{t.lengthComputable&&(o.uploadTotal=t.total,o.uploaded=t.loaded)})}_sendRequest(t){const e=new FormData;e.append("upload",t),e.append("ckCsrfToken",Oh()),this.xhr.send(e)}}class Lh{static get pluginName(){return"BlockAutoformatEditing"}constructor(t,e,n){let i,o=null;"function"==typeof n?i=n:(o=t.commands.get(n),i=()=>{t.execute(n)}),t.model.document.on("change",(n,r)=>{if(o&&!o.isEnabled)return;if("transparent"==r.type)return;const s=Array.from(t.model.document.differ.getChanges()),a=s[0];if(1!=s.length||"insert"!==a.type||"$text"!=a.name||1!=a.length)return;const c=a.position.parent;if(!c.is("paragraph")||1!==c.childCount)return;const l=e.exec(c.getChild(0).data);l&&t.model.enqueueChange(t=>{const e=t.createPositionAt(c,0),n=t.createPositionAt(c,l[0].length),o=new ca(e,n);!1!==i({match:l})&&t.remove(o),o.detach()})})}}class jh{static get pluginName(){return"InlineAutoformatEditing"}constructor(t,e,n){let i,o,r,s;e instanceof RegExp?i=e:r=e,"string"==typeof n?o=n:s=n,r=r||(t=>{let e;const n=[],o=[];for(;null!==(e=i.exec(t))&&!(e&&e.length<4);){let{index:t,1:i,2:r,3:s}=e;const a=i+r+s,c=[t+=e[0].length-a.length,t+i.length],l=[t+i.length+r.length,t+i.length+r.length+s.length];n.push(c),n.push(l),o.push([t+i.length,t+i.length+r.length])}return{remove:n,format:o}}),s=s||((e,n)=>{const i=t.model.schema.getValidRanges(n,o);for(const t of i)e.setAttribute(o,!0,t);e.removeSelectionAttribute(o)}),t.model.document.on("change",(e,n)=>{if("transparent"==n.type)return;const i=t.model,o=i.document.selection;if(!o.isCollapsed)return;const a=Array.from(i.document.differ.getChanges()),c=a[0];if(1!=a.length||"insert"!==c.type||"$text"!=c.name||1!=c.length)return;const l=o.focus,d=l.parent,{text:h,range:u}=function(t,e){let n=t.start;return{text:Array.from(t.getItems()).reduce((t,i)=>i.is("text")||i.is("textProxy")?t+i.data:(n=e.createPositionAfter(i),""),""),range:e.createRange(n,t.end)}}(i.createRange(i.createPositionAt(d,0),l),i),f=r(h),g=Vh(u.start,f.format,i),m=Vh(u.start,f.remove,i);g.length&&m.length&&i.enqueueChange(t=>{if(!1!==s(t,g))for(const e of m.reverse())t.remove(e)})})}}function Vh(t,e,n){return e.filter(t=>void 0!==t[0]&&void 0!==t[1]).map(e=>n.createRange(t.getShiftedBy(e[0]),t.getShiftedBy(e[1])))}function zh(t,e){return(n,i)=>{if(!t.commands.get(e).isEnabled)return!1;const o=t.model.schema.getValidRanges(i,e);for(const t of o)n.setAttribute(e,!0,t);n.removeSelectionAttribute(e)}}class Bh extends Rd{constructor(t,e){super(t),this.attributeKey=e}refresh(){const t=this.editor.model,e=t.document;this.value=this._getValueFromFirstAllowedNode(),this.isEnabled=t.schema.checkAttributeInSelection(e.selection,this.attributeKey)}execute(t={}){const e=this.editor.model,n=e.document.selection,i=void 0===t.forceValue?!this.value:t.forceValue;e.change(t=>{if(n.isCollapsed)i?t.setSelectionAttribute(this.attributeKey,!0):t.removeSelectionAttribute(this.attributeKey);else{const o=e.schema.getValidRanges(n.getRanges(),this.attributeKey);for(const e of o)i?t.setAttribute(this.attributeKey,i,e):t.removeAttribute(this.attributeKey,e)}})}_getValueFromFirstAllowedNode(){const t=this.editor.model,e=t.schema,n=t.document.selection;if(n.isCollapsed)return n.hasAttribute(this.attributeKey);for(const t of n.getRanges())for(const n of t.getItems())if(e.checkAttribute(n,this.attributeKey))return n.hasAttribute(this.attributeKey);return!1}}const Fh="bold";class Uh extends Md{static get pluginName(){return"BoldEditing"}init(){const t=this.editor;t.model.schema.extend("$text",{allowAttributes:Fh}),t.model.schema.setAttributeProperties(Fh,{isFormatting:!0,copyOnEnter:!0}),t.conversion.attributeToElement({model:Fh,view:"strong",upcastAlso:["b",t=>{const e=t.getStyle("font-weight");return e?"bold"==e||Number(e)>=600?{name:!0,styles:["font-weight"]}:void 0:null}]}),t.commands.add(Fh,new Bh(t,Fh)),t.keystrokes.set("CTRL+B",Fh)}}var Hh='';const qh="bold";class Wh extends Md{init(){const t=this.editor,e=t.t;t.ui.componentFactory.add(qh,n=>{const i=t.commands.get(qh),o=new ud(n);return o.set({label:e("d"),icon:Hh,keystroke:"CTRL+B",tooltip:!0,isToggleable:!0}),o.bind("isOn","isEnabled").to(i,"value","isEnabled"),this.listenTo(o,"execute",()=>t.execute(qh)),o})}}const Yh="italic";class $h extends Md{static get pluginName(){return"ItalicEditing"}init(){const t=this.editor;t.model.schema.extend("$text",{allowAttributes:Yh}),t.model.schema.setAttributeProperties(Yh,{isFormatting:!0,copyOnEnter:!0}),t.conversion.attributeToElement({model:Yh,view:"i",upcastAlso:["em",{styles:{"font-style":"italic"}}]}),t.commands.add(Yh,new Bh(t,Yh)),t.keystrokes.set("CTRL+I",Yh)}}var Gh='';const Qh="italic";class Kh extends Md{init(){const t=this.editor,e=t.t;t.ui.componentFactory.add(Qh,n=>{const i=t.commands.get(Qh),o=new ud(n);return o.set({label:e("o"),icon:Gh,keystroke:"CTRL+I",tooltip:!0,isToggleable:!0}),o.bind("isOn","isEnabled").to(i,"value","isEnabled"),this.listenTo(o,"execute",()=>t.execute(Qh)),o})}}function Jh(t){const e=t.next();return e.done?null:e.value}class Zh extends Rd{refresh(){this.value=this._getValue(),this.isEnabled=this._checkEnabled()}execute(t={}){const e=this.editor.model,n=e.schema,i=e.document.selection,o=Array.from(i.getSelectedBlocks()),r=void 0===t.forceValue?!this.value:t.forceValue;e.change(t=>{if(r){const e=o.filter(t=>Xh(t)||eu(n,t));this._applyQuote(t,e)}else this._removeQuote(t,o.filter(Xh))})}_getValue(){const t=Jh(this.editor.model.document.selection.getSelectedBlocks());return!(!t||!Xh(t))}_checkEnabled(){if(this.value)return!0;const t=this.editor.model.document.selection,e=this.editor.model.schema,n=Jh(t.getSelectedBlocks());return!!n&&eu(e,n)}_removeQuote(t,e){tu(t,e).reverse().forEach(e=>{if(e.start.isAtStart&&e.end.isAtEnd)return void t.unwrap(e.start.parent);if(e.start.isAtStart){const n=t.createPositionBefore(e.start.parent);return void t.move(e,n)}e.end.isAtEnd||t.split(e.end);const n=t.createPositionAfter(e.end.parent);t.move(e,n)})}_applyQuote(t,e){const n=[];tu(t,e).reverse().forEach(e=>{let i=Xh(e.start);i||(i=t.createElement("blockQuote"),t.wrap(e,i)),n.push(i)}),n.reverse().reduce((e,n)=>e.nextSibling==n?(t.merge(t.createPositionAfter(e)),e):n)}}function Xh(t){return"blockQuote"==t.parent.name?t.parent:null}function tu(t,e){let n,i=0;const o=[];for(;i{if(t.endsWith("blockQuote")&&"blockQuote"==e.name)return!1}),t.conversion.elementToElement({model:"blockQuote",view:"blockquote"}),t.model.document.registerPostFixer(n=>{const i=t.model.document.differ.getChanges();for(const t of i)if("insert"==t.type){const i=t.position.nodeAfter;if(!i)continue;if(i.is("blockQuote")&&i.isEmpty)return n.remove(i),!0;if(i.is("blockQuote")&&!e.checkChild(t.position,i))return n.unwrap(i),!0;if(i.is("element")){const t=n.createRangeIn(i);for(const i of t.getItems())if(i.is("blockQuote")&&!e.checkChild(n.createPositionBefore(i),i))return n.unwrap(i),!0}}else if("remove"==t.type){const e=t.position.parent;if(e.is("blockQuote")&&e.isEmpty)return n.remove(e),!0}return!1})}afterInit(){const t=this.editor.commands.get("blockQuote");this.listenTo(this.editor.editing.view.document,"enter",(e,n)=>{const i=this.editor.model.document,o=i.selection.getLastPosition().parent;i.selection.isCollapsed&&o.isEmpty&&t.value&&(this.editor.execute("blockQuote"),this.editor.editing.view.scrollToTheSelection(),n.preventDefault(),e.stop())})}}var iu='';n(43);class ou extends Md{init(){const t=this.editor,e=t.t;t.ui.componentFactory.add("blockQuote",n=>{const i=t.commands.get("blockQuote"),o=new ud(n);return o.set({label:e("e"),icon:iu,tooltip:!0,isToggleable:!0}),o.bind("isOn","isEnabled").to(i,"value","isEnabled"),this.listenTo(o,"execute",()=>t.execute("blockQuote")),o})}}var ru='';class su extends Md{static get pluginName(){return"CKFinderUI"}init(){const t=this.editor,e=t.ui.componentFactory,n=t.t;e.add("ckfinder",e=>{const i=t.commands.get("ckfinder"),o=new ud(e);return o.set({label:n("g"),icon:ru,tooltip:!0}),o.bind("isEnabled").to(i),o.on("execute",()=>{t.execute("ckfinder"),t.editing.view.focus()}),o})}}class au extends mr{observe(t){this.listenTo(t,"load",(t,e)=>{"IMG"==e.target.tagName&&this._fireEvents(e)},{useCapture:!0})}_fireEvents(t){this.isEnabled&&(this.document.fire("layoutChanged"),this.document.fire("imageLoaded",t))}}function cu(t){return n=>{n.on(`attribute:${t}:image`,e)};function e(t,e,n){if(!n.consumable.consume(e.item,t.name))return;const i=n.writer,o=n.mapper.toViewElement(e.item).getChild(0);null!==e.attributeNewValue?i.setAttribute(e.attributeKey,e.attributeNewValue,o):i.removeAttribute(e.attributeKey,o)}}class lu{constructor(){this._stack=[]}add(t,e){const n=this._stack,i=n[0];this._insertDescriptor(t);const o=n[0];i===o||du(i,o)||this.fire("change:top",{oldDescriptor:i,newDescriptor:o,writer:e})}remove(t,e){const n=this._stack,i=n[0];this._removeDescriptor(t);const o=n[0];i===o||du(i,o)||this.fire("change:top",{oldDescriptor:i,newDescriptor:o,writer:e})}_insertDescriptor(t){const e=this._stack,n=e.findIndex(e=>e.id===t.id);if(du(t,e[n]))return;n>-1&&e.splice(n,1);let i=0;for(;e[i]&&hu(e[i],t);)i++;e.splice(i,0,t)}_removeDescriptor(t){const e=this._stack,n=e.findIndex(e=>e.id===t);n>-1&&e.splice(n,1)}}function du(t,e){return t&&e&&t.priority==e.priority&&uu(t.classes)==uu(e.classes)}function hu(t,e){return t.priority>e.priority||!(t.priorityuu(e.classes)}function uu(t){return Array.isArray(t)?t.sort().join(","):t}li(lu,ni);var fu='';const gu="ck-widget",mu="ck-widget_selected";function pu(t){return!!t.is("element")&&!!t.getCustomProperty("widget")}function bu(t,e,n={}){return mo.isEdge||e.setAttribute("contenteditable","false",t),e.addClass(gu,t),e.setCustomProperty("widget",!0,t),t.getFillerOffset=vu,n.label&&function(t,e,n){n.setCustomProperty("widgetLabel",e,t)}(t,n.label,e),n.hasSelectionHandle&&function(t,e){const n=e.createUIElement("div",{class:"ck ck-widget__selection-handle"},(function(t){const e=this.toDomElement(t),n=new dd;return n.set("content",fu),n.render(),e.appendChild(n.element),e}));e.insert(e.createPositionAt(t,0),n),e.addClass(["ck-widget_with-selection-handle"],t)}(t,e),function(t,e,n,i){const o=new lu;o.on("change:top",(e,o)=>{o.oldDescriptor&&i(t,o.oldDescriptor,o.writer),o.newDescriptor&&n(t,o.newDescriptor,o.writer)}),e.setCustomProperty("addHighlight",(t,e,n)=>o.add(e,n),t),e.setCustomProperty("removeHighlight",(t,e,n)=>o.remove(e,n),t)}(t,e,(t,e,n)=>n.addClass(i(e.classes),t),(t,e,n)=>n.removeClass(i(e.classes),t)),t;function i(t){return Array.isArray(t)?t:[t]}}function wu(t){const e=t.getCustomProperty("widgetLabel");return e?"function"==typeof e?e():e:""}function ku(t,e){return e.addClass(["ck-editor__editable","ck-editor__nested-editable"],t),mo.isEdge||(e.setAttribute("contenteditable",t.isReadOnly?"false":"true",t),t.on("change:isReadOnly",(n,i,o)=>{e.setAttribute("contenteditable",o?"false":"true",t)})),t.on("change:isFocused",(n,i,o)=>{o?e.addClass("ck-editor__nested-editable_focused",t):e.removeClass("ck-editor__nested-editable_focused",t)}),t}function _u(t,e){const n=t.getSelectedElement();if(n&&e.schema.isBlock(n))return e.createPositionAfter(n);const i=t.getSelectedBlocks().next().value;if(i){if(i.isEmpty)return e.createPositionAt(i,0);const n=e.createPositionAfter(i);return t.focus.isTouching(n)?n:e.createPositionBefore(i)}return t.focus}function vu(){return null}function yu(t){const e=t.getSelectedElement();return e&&function(t){return!!t.getCustomProperty("image")&&pu(t)}(e)?e:null}function xu(t){return!!t&&t.is("image")}function Au(t,e,n={}){const i=t.createElement("image",n),o=_u(e.document.selection,e);e.insertContent(i,o),i.parent&&t.setSelection(i,"on")}function Tu(t){const e=t.schema,n=t.document.selection;return function(t,e,n){const i=function(t,e){const n=_u(t,e).parent;if(n.isEmpty&&!n.is("$root"))return n.parent;return n}(t,n);return e.checkChild(i,"image")}(n,e,t)&&!function(t,e){const n=t.getSelectedElement();return n&&e.isObject(n)}(n,e)&&function(t){return[...t.focus.getAncestors()].every(t=>!t.is("image"))}(n)}class Cu extends Rd{refresh(){this.isEnabled=Tu(this.editor.model)}execute(t){const e=this.editor.model;e.change(n=>{const i=Array.isArray(t.source)?t.source:[t.source];for(const t of i)Au(n,e,{src:t})})}}class Pu extends Md{static get pluginName(){return"ImageEditing"}init(){const t=this.editor,e=t.model.schema,n=t.t,i=t.conversion;t.editing.view.addObserver(au),e.register("image",{isObject:!0,isBlock:!0,allowWhere:"$block",allowAttributes:["alt","src","srcset"]}),i.for("dataDowncast").elementToElement({model:"image",view:(t,e)=>Su(e)}),i.for("editingDowncast").elementToElement({model:"image",view:(t,e)=>(function(t,e,n){return e.setCustomProperty("image",!0,t),bu(t,e,{label:function(){const e=t.getChild(0).getAttribute("alt");return e?`${e} ${n}`:n}})})(Su(e),e,n("f"))}),i.for("downcast").add(cu("src")).add(cu("alt")).add(function(){return e=>{e.on("attribute:srcset:image",t)};function t(t,e,n){if(!n.consumable.consume(e.item,t.name))return;const i=n.writer,o=n.mapper.toViewElement(e.item).getChild(0);if(null===e.attributeNewValue){const t=e.attributeOldValue;t.data&&(i.removeAttribute("srcset",o),i.removeAttribute("sizes",o),t.width&&i.removeAttribute("width",o))}else{const t=e.attributeNewValue;t.data&&(i.setAttribute("srcset",t.data,o),i.setAttribute("sizes","100vw",o),t.width&&i.setAttribute("width",t.width,o))}}}()),i.for("upcast").elementToElement({view:{name:"img",attributes:{src:!0}},model:(t,e)=>e.createElement("image",{src:t.getAttribute("src")})}).attributeToAttribute({view:{name:"img",key:"alt"},model:"alt"}).attributeToAttribute({view:{name:"img",key:"srcset"},model:{key:"srcset",value:t=>{const e={data:t.getAttribute("srcset")};return t.hasAttribute("width")&&(e.width=t.getAttribute("width")),e}}}).add(function(){return e=>{e.on("element:figure",t)};function t(t,e,n){if(!n.consumable.test(e.viewItem,{name:!0,classes:"image"}))return;const i=Array.from(e.viewItem.getChildren()).find(t=>t.is("img"));if(!i||!i.hasAttribute("src")||!n.consumable.test(i,{name:!0}))return;const o=n.convertItem(i,e.modelCursor),r=Jh(o.modelRange.getItems());r&&(n.convertChildren(e.viewItem,n.writer.createPositionAt(r,0)),e.modelRange=o.modelRange,e.modelCursor=o.modelCursor)}}()),t.commands.add("imageInsert",new Cu(t))}}function Su(t){const e=t.createEmptyElement("img"),n=t.createContainerElement("figure",{class:"image"});return t.insert(t.createPositionAt(n,0),e),n}function Mu(t,e,n){return n.createRange(Eu(t,e,!0,n),Eu(t,e,!1,n))}function Eu(t,e,n,i){let o=t.textNode||(n?t.nodeBefore:t.nodeAfter),r=null;for(;o&&o.getAttribute("linkHref")==e;)r=o,o=n?o.previousSibling:o.nextSibling;return r?i.createPositionAt(r,n?"before":"after"):t}class Iu extends Rd{constructor(t){super(t),this.manualDecorators=new ro}restoreManualDecoratorStates(){for(const t of this.manualDecorators)t.value=this._getDecoratorStateFromModel(t.id)}refresh(){const t=this.editor.model,e=t.document;this.value=e.selection.getAttribute("linkHref");for(const t of this.manualDecorators)t.value=this._getDecoratorStateFromModel(t.id);this.isEnabled=t.schema.checkAttributeInSelection(e.selection,"linkHref")}execute(t,e={}){const n=this.editor.model,i=n.document.selection,o=[],r=[];for(const t in e)e[t]?o.push(t):r.push(t);n.change(e=>{if(i.isCollapsed){const s=i.getFirstPosition();if(i.hasAttribute("linkHref")){const a=Mu(s,i.getAttribute("linkHref"),n);e.setAttribute("linkHref",t,a),o.forEach(t=>{e.setAttribute(t,!0,a)}),r.forEach(t=>{e.removeAttribute(t,a)}),e.setSelection(a)}else if(""!==t){const r=Fs(i.getAttributes());r.set("linkHref",t),o.forEach(t=>{r.set(t,!0)});const a=e.createText(t,r);n.insertContent(a,s),e.setSelection(e.createRangeOn(a))}}else{const s=n.schema.getValidRanges(i.getRanges(),"linkHref");for(const n of s)e.setAttribute("linkHref",t,n),o.forEach(t=>{e.setAttribute(t,!0,n)}),r.forEach(t=>{e.removeAttribute(t,n)})}})}_getDecoratorStateFromModel(t){return this.editor.model.document.selection.getAttribute(t)||!1}}class Nu extends Rd{refresh(){this.isEnabled=this.editor.model.document.selection.hasAttribute("linkHref")}execute(){const t=this.editor,e=this.editor.model,n=e.document.selection,i=t.commands.get("link");e.change(t=>{const o=n.isCollapsed?[Mu(n.getFirstPosition(),n.getAttribute("linkHref"),e)]:n.getRanges();for(const e of o)if(t.removeAttribute("linkHref",e),i)for(const n of i.manualDecorators)t.removeAttribute(n.id,e)})}}var Ou=function(t,e,n){var i=-1,o=t.length;e<0&&(e=-e>o?0:o+e),(n=n>o?o:n)<0&&(n+=o),o=e>n?0:n-e>>>0,e>>>=0;for(var r=Array(o);++i=i?t:Ou(t,e,n)},Du=RegExp("[\\u200d\\ud800-\\udfff\\u0300-\\u036f\\ufe20-\\ufe2f\\u20d0-\\u20ff\\ufe0e\\ufe0f]");var Lu=function(t){return Du.test(t)};var ju=function(t){return t.split("")},Vu="[\\ud800-\\udfff]",zu="[\\u0300-\\u036f\\ufe20-\\ufe2f\\u20d0-\\u20ff]",Bu="\\ud83c[\\udffb-\\udfff]",Fu="[^\\ud800-\\udfff]",Uu="(?:\\ud83c[\\udde6-\\uddff]){2}",Hu="[\\ud800-\\udbff][\\udc00-\\udfff]",qu="(?:"+zu+"|"+Bu+")"+"?",Wu="[\\ufe0e\\ufe0f]?"+qu+("(?:\\u200d(?:"+[Fu,Uu,Hu].join("|")+")[\\ufe0e\\ufe0f]?"+qu+")*"),Yu="(?:"+[Fu+zu+"?",zu,Uu,Hu,Vu].join("|")+")",$u=RegExp(Bu+"(?="+Bu+")|"+Yu+Wu,"g");var Gu=function(t){return t.match($u)||[]};var Qu=function(t){return Lu(t)?Gu(t):ju(t)};var Ku=function(t,e){for(var n=-1,i=null==t?0:t.length,o=Array(i);++nthis._definitions.add(t)):this._definitions.add(t)}getDispatcher(){return t=>{t.on("attribute:linkHref",(t,e,n)=>{if(!n.consumable.test(e.item,"attribute:linkHref"))return;const i=n.writer,o=i.document.selection;for(const t of this._definitions){const r=i.createAttributeElement("a",t.attributes,{priority:5});i.setCustomProperty("link",!0,r),t.callback(e.attributeNewValue)?e.item.is("selection")?i.wrap(o.getFirstRange(),r):i.wrap(n.mapper.toViewRange(e.range),r):i.unwrap(n.mapper.toViewRange(e.range),r)}},{priority:"high"})}}}class lf{constructor({id:t,label:e,attributes:n}){this.id=t,this.set("value"),this.label=e,this.attributes=n}}li(lf,Ui);class df{constructor(t,e,n){this.model=t,this.attribute=n,this._modelSelection=t.document.selection,this._overrideUid=null,this._isNextGravityRestorationSkipped=!1,e.listenTo(this._modelSelection,"change:range",(t,e)=>{this._isNextGravityRestorationSkipped?this._isNextGravityRestorationSkipped=!1:this._isGravityOverridden&&(!e.directChange&&hf(this._modelSelection.getFirstPosition(),n)||this._restoreGravity())})}handleForwardMovement(t,e){const n=this.attribute;if(!(this._isGravityOverridden||t.isAtStart&&this._hasSelectionAttribute))return gf(t,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(e),this._removeSelectionAttribute(),!0):uf(t,n)?(this._preventCaretMovement(e),this._overrideGravity(),!0):ff(t,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(e),this._overrideGravity(),!0):void 0}handleBackwardMovement(t,e){const n=this.attribute;return this._isGravityOverridden?gf(t,n)&&this._hasSelectionAttribute?(this._preventCaretMovement(e),this._restoreGravity(),this._removeSelectionAttribute(),!0):(this._preventCaretMovement(e),this._restoreGravity(),t.isAtStart&&this._removeSelectionAttribute(),!0):gf(t,n)&&!this._hasSelectionAttribute?(this._preventCaretMovement(e),this._setSelectionAttributeFromTheNodeBefore(t),!0):t.isAtEnd&&ff(t,n)?this._hasSelectionAttribute?void(mf(t,n)&&(this._skipNextAutomaticGravityRestoration(),this._overrideGravity())):(this._preventCaretMovement(e),this._setSelectionAttributeFromTheNodeBefore(t),!0):t.isAtStart?this._hasSelectionAttribute?(this._removeSelectionAttribute(),this._preventCaretMovement(e),!0):void 0:void(mf(t,n)&&(this._skipNextAutomaticGravityRestoration(),this._overrideGravity()))}get _isGravityOverridden(){return!!this._overrideUid}get _hasSelectionAttribute(){return this._modelSelection.hasAttribute(this.attribute)}_overrideGravity(){this._overrideUid=this.model.change(t=>t.overrideSelectionGravity())}_restoreGravity(){this.model.change(t=>{t.restoreSelectionGravity(this._overrideUid),this._overrideUid=null})}_preventCaretMovement(t){t.preventDefault()}_removeSelectionAttribute(){this.model.change(t=>{t.removeSelectionAttribute(this.attribute)})}_setSelectionAttributeFromTheNodeBefore(t){const e=this.attribute;this.model.change(n=>{n.setSelectionAttribute(this.attribute,t.nodeBefore.getAttribute(e))})}_skipNextAutomaticGravityRestoration(){this._isNextGravityRestorationSkipped=!0}}function hf(t,e){return uf(t,e)||ff(t,e)}function uf(t,e){const{nodeBefore:n,nodeAfter:i}=t,o=!!n&&n.hasAttribute(e);return!!i&&i.hasAttribute(e)&&(!o||n.getAttribute(e)!==i.getAttribute(e))}function ff(t,e){const{nodeBefore:n,nodeAfter:i}=t,o=!!n&&n.hasAttribute(e),r=!!i&&i.hasAttribute(e);return o&&(!r||n.getAttribute(e)!==i.getAttribute(e))}function gf(t,e){const{nodeBefore:n,nodeAfter:i}=t,o=!!n&&n.hasAttribute(e);if(!!i&&i.hasAttribute(e)&&o)return i.getAttribute(e)!==n.getAttribute(e)}function mf(t,e){return hf(t.getShiftedBy(-1),e)}n(45);const pf="ck-link_selected",bf="automatic",wf="manual",kf=/^(https?:)?\/\//;class _f extends Md{static get pluginName(){return"LinkEditing"}constructor(t){super(t),t.config.define("link",{addTargetToExternalLinks:!1})}init(){const t=this.editor,e=t.locale;t.model.schema.extend("$text",{allowAttributes:"linkHref"}),t.conversion.for("dataDowncast").attributeToElement({model:"linkHref",view:sf}),t.conversion.for("editingDowncast").attributeToElement({model:"linkHref",view:(t,e)=>sf(af(t),e)}),t.conversion.for("upcast").elementToAttribute({view:{name:"a",attributes:{href:!0}},model:{key:"linkHref",value:t=>t.getAttribute("href")}}),t.commands.add("link",new Iu(t)),t.commands.add("unlink",new Nu(t));const n=function(t,e){const n={"Open in a new tab":t("aw"),Downloadable:t("ax")};return e.forEach(t=>(t.label&&n[t.label]&&(t.label=n[t.label]),t)),e}(t.t,function(t){const e=[];if(t)for(const[n,i]of Object.entries(t)){const t=Object.assign({},i,{id:`link${nf(n)}`});e.push(t)}return e}(t.config.get("link.decorators")));this._enableAutomaticDecorators(n.filter(t=>t.mode===bf)),this._enableManualDecorators(n.filter(t=>t.mode===wf)),function({view:t,model:e,emitter:n,attribute:i,locale:o}){const r=new df(e,n,i),s=e.document.selection;n.listenTo(t.document,"keydown",(t,e)=>{if(!s.isCollapsed)return;if(e.shiftKey||e.altKey||e.ctrlKey)return;const n=e.keyCode==wo.arrowright,i=e.keyCode==wo.arrowleft;if(!n&&!i)return;const a=s.getFirstPosition(),c=o.contentLanguageDirection;let l;(l="ltr"===c&&n||"rtl"===c&&i?r.handleForwardMovement(a,e):r.handleBackwardMovement(a,e))&&t.stop()},{priority:Xn.get("high")+1})}({view:t.editing.view,model:t.model,emitter:this,attribute:"linkHref",locale:e}),this._setupLinkHighlight()}_enableAutomaticDecorators(t){const e=this.editor,n=new cf;e.config.get("link.addTargetToExternalLinks")&&n.add({id:"linkIsExternal",mode:bf,callback:t=>kf.test(t),attributes:{target:"_blank",rel:"noopener noreferrer"}}),n.add(t),n.length&&e.conversion.for("downcast").add(n.getDispatcher())}_enableManualDecorators(t){if(!t.length)return;const e=this.editor,n=e.commands.get("link").manualDecorators;t.forEach(t=>{e.model.schema.extend("$text",{allowAttributes:t.id}),n.add(new lf(t)),e.conversion.for("downcast").attributeToElement({model:t.id,view:(e,i)=>{if(e){const e=n.get(t.id).attributes,o=i.createAttributeElement("a",e,{priority:5});return i.setCustomProperty("link",!0,o),o}}}),e.conversion.for("upcast").elementToAttribute({view:{name:"a",attributes:n.get(t.id).attributes},model:{key:t.id}})})}_setupLinkHighlight(){const t=this.editor,e=t.editing.view,n=new Set;e.document.registerPostFixer(e=>{const i=t.model.document.selection;let o=!1;if(i.hasAttribute("linkHref")){const r=Mu(i.getFirstPosition(),i.getAttribute("linkHref"),t.model),s=t.editing.mapper.toViewRange(r);for(const t of s.getItems())t.is("a")&&!t.hasClass(pf)&&(e.addClass(pf,t),n.add(t),o=!0)}return o}),t.conversion.for("editingDowncast").add(t=>{function i(){e.change(t=>{for(const e of n.values())t.removeClass(pf,e),n.delete(e)})}t.on("insert",i,{priority:"highest"}),t.on("remove",i,{priority:"highest"}),t.on("attribute",i,{priority:"highest"}),t.on("selection",i,{priority:"highest"})})}}class vf extends Md{static get pluginName(){return"Notification"}init(){this.on("show:warning",(t,e)=>{window.alert(e.message)},{priority:"lowest"})}showSuccess(t,e={}){this._showNotification({message:t,type:"success",namespace:e.namespace,title:e.title})}showInfo(t,e={}){this._showNotification({message:t,type:"info",namespace:e.namespace,title:e.title})}showWarning(t,e={}){this._showNotification({message:t,type:"warning",namespace:e.namespace,title:e.title})}_showNotification(t){const e=`show:${t.type}`+(t.namespace?`:${t.namespace}`:"");this.fire(e,{message:t.message,type:t.type,title:t.title||""})}}class yf extends Rd{constructor(t){super(t),this.stopListening(this.editor.model.document,"change"),this.listenTo(this.editor.model.document,"change",()=>this.refresh(),{priority:"low"})}refresh(){const t=this.editor.commands.get("imageInsert"),e=this.editor.commands.get("link");this.isEnabled=t.isEnabled||e.isEnabled}execute(){const t=this.editor,e=this.editor.config.get("ckfinder.openerMethod")||"modal";if("popup"!=e&&"modal"!=e)throw new Qn.b('ckfinder-unknown-openerMethod: The openerMethod config option must by "popup" or "modal".',t);const n=this.editor.config.get("ckfinder.options")||{};n.chooseFiles=!0;const i=n.onInit;n.language||(n.language=t.locale.uiLanguage),n.onInit=e=>{i&&i(e),e.on("files:choose",n=>{const i=n.data.files.toArray(),o=i.filter(t=>!t.isImage()),r=i.filter(t=>t.isImage());for(const e of o)t.execute("link",e.getUrl());const s=[];for(const t of r){const n=t.getUrl();s.push(n||e.request("file:getProxyUrl",{file:t}))}s.length&&xf(t,s)}),e.on("file:choose:resizedImage",e=>{const n=e.data.resizedUrl;if(n)xf(t,[n]);else{const e=t.plugins.get("Notification"),n=t.locale.t;e.showWarning(n("ca"),{title:n("cb"),namespace:"ckfinder"})}})},window.CKFinder[e](n)}}function xf(t,e){if(t.commands.get("imageInsert").isEnabled)t.execute("imageInsert",{source:e});else{const e=t.plugins.get("Notification"),n=t.locale.t;e.showWarning(n("cc"),{title:n("cd"),namespace:"ckfinder"})}}class Af extends Md{static get pluginName(){return"CKFinderEditing"}static get requires(){return[vf,Pu,_f]}init(){const t=this.editor;t.commands.add("ckfinder",new yf(t))}}const Tf=/^data:(\S*?);base64,/;class Cf{constructor(t,e,n){if(!t)throw new Qn.b("fileuploader-missing-file: File must be provided as the first argument",null);if(!e)throw new Qn.b("fileuploader-missing-token: Token must be provided as the second argument.",null);if(!n)throw new Qn.b("fileuploader-missing-api-address: Api address must be provided as the third argument.",null);this.file=function(t){if("string"!=typeof t)return!1;const e=t.match(Tf);return!(!e||!e.length)}(t)?function(t,e=512){try{const n=t.match(Tf)[1],i=atob(t.replace(Tf,"")),o=[];for(let t=0;tt(n)),this}onError(t){return this.once("error",(e,n)=>t(n)),this}abort(){this.xhr.abort()}send(){return this._prepareRequest(),this._attachXHRListeners(),this._sendRequest()}_prepareRequest(){const t=new XMLHttpRequest;t.open("POST",this._apiAddress),t.setRequestHeader("Authorization",this._token.value),t.responseType="json",this.xhr=t}_attachXHRListeners(){const t=this,e=this.xhr;function n(e){return()=>t.fire("error",e)}e.addEventListener("error",n("Network Error")),e.addEventListener("abort",n("Abort")),e.upload&&e.upload.addEventListener("progress",t=>{t.lengthComputable&&this.fire("progress",{total:t.total,uploaded:t.loaded})}),e.addEventListener("load",()=>{const t=e.status,n=e.response;if(t<200||t>299)return this.fire("error",n.message||n.error)})}_sendRequest(){const t=new FormData,e=this.xhr;return t.append("file",this.file),new Promise((n,i)=>{e.addEventListener("load",()=>{const t=e.status,o=e.response;return t<200||t>299?o.message?i(new Qn.b("fileuploader-uploading-data-failed: Uploading file failed.",this,{message:o.message})):i(o.error):n(o)}),e.addEventListener("error",()=>i(new Error("Network Error"))),e.addEventListener("abort",()=>i(new Error("Abort"))),e.send(t)})}}li(Cf,ni);const Pf={refreshInterval:36e5,autoRefresh:!0};class Sf{constructor(t,e=Pf){if(!t)throw new Qn.b("token-missing-token-url: A `tokenUrl` must be provided as the first constructor argument.",this);this.set("value",e.initValue),this._refresh="function"==typeof t?t:()=>(function(t){return new Promise((e,n)=>{const i=new XMLHttpRequest;i.open("GET",t),i.addEventListener("load",()=>{const t=i.status,o=i.response;return t<200||t>299?n(new Qn.b("token-cannot-download-new-token: Cannot download new token from the provided url.",null)):e(o)}),i.addEventListener("error",()=>n(new Error("Network Error"))),i.addEventListener("abort",()=>n(new Error("Abort"))),i.send()})})(t),this._options=Object.assign({},Pf,e)}init(){return new Promise((t,e)=>{this._options.autoRefresh&&this._startRefreshing(),this.value?t(this):this._refreshToken().then(t).catch(e)})}_refreshToken(){return this._refresh().then(t=>this.set("value",t)).then(()=>this)}destroy(){this._stopRefreshing()}_startRefreshing(){this._refreshInterval=setInterval(()=>this._refreshToken(),this._options.refreshInterval)}_stopRefreshing(){clearInterval(this._refreshInterval)}static create(t,e=Pf){return new Sf(t,e).init()}}li(Sf,Ui);var Mf=Sf;class Ef extends Md{static get pluginName(){return"CloudServices"}init(){const t=this.editor.config.get("cloudServices")||{};for(const e in t)this[e]=t[e];if(this.tokenUrl)return this.token=new Ef.Token(this.tokenUrl),this.token.init();this.token=null}}Ef.Token=Mf;class If extends Md{static get requires(){return[Sh,Ef]}init(){const t=this.editor,e=t.plugins.get(Ef),n=e.token,i=e.uploadUrl;n&&(this._uploadGateway=new If._UploadGateway(n,i),t.plugins.get(Sh).createUploadAdapter=t=>new Nf(this._uploadGateway,t))}}class Nf{constructor(t,e){this.uploadGateway=t,this.loader=e}upload(){return this.loader.file.then(t=>(this.fileUploader=this.uploadGateway.upload(t),this.fileUploader.on("progress",(t,e)=>{this.loader.uploadTotal=e.total,this.loader.uploaded=e.uploaded}),this.fileUploader.send()))}abort(){this.fileUploader.abort()}}If._UploadGateway=class{constructor(t,e){if(!t)throw new Qn.b("uploadgateway-missing-token: Token must be provided.",null);if(!e)throw new Qn.b("uploadgateway-missing-api-address: Api address must be provided.",null);this._token=t,this._apiAddress=e}upload(t){return new Cf(t,this._token,this._apiAddress)}};class Of extends is{constructor(t){super(t),this.domEventType="mousedown"}onDomEvent(t){this.fire(t.type,t)}}n(47);const Rf=_o("Ctrl+A");class Df extends Md{static get pluginName(){return"Widget"}init(){const t=this.editor.editing.view,e=t.document;this._previouslySelected=new Set,this.editor.editing.downcastDispatcher.on("selection",(t,e,n)=>{this._clearPreviouslySelectedWidgets(n.writer);const i=n.writer,o=i.document.selection,r=o.getSelectedElement();let s=null;for(const t of o.getRanges())for(const e of t){const t=e.item;pu(t)&&!Lf(t,s)&&(i.addClass(mu,t),this._previouslySelected.add(t),s=t,t==r&&i.setSelection(o.getRanges(),{fake:!0,label:wu(r)}))}},{priority:"low"}),t.addObserver(Of),this.listenTo(e,"mousedown",(...t)=>this._onMousedown(...t)),this.listenTo(e,"keydown",(...t)=>this._onKeydown(...t),{priority:"high"}),this.listenTo(e,"delete",(t,e)=>{this._handleDelete("forward"==e.direction)&&(e.preventDefault(),t.stop())},{priority:"high"})}_onMousedown(t,e){const n=this.editor,i=n.editing.view,o=i.document;let r=e.target;if(function(t){for(;t;){if(t.is("editableElement")&&!t.is("rootElement"))return!0;if(pu(t))return!1;t=t.parent}return!1}(r)){if(mo.isSafari&&e.domEvent.detail>=3){const t=n.editing.mapper.toModelElement(r);this.editor.model.change(n=>{e.preventDefault(),n.setSelection(t,"in")})}return}if(!pu(r)&&!(r=r.findAncestor(pu)))return;e.preventDefault(),o.isFocused||i.focus();const s=n.editing.mapper.toModelElement(r);this._setSelectionOverElement(s)}_onKeydown(t,e){const n=e.keyCode,i="ltr"===this.editor.locale.contentLanguageDirection,o=n==wo.arrowdown||n==wo[i?"arrowright":"arrowleft"];let r=!1;!function(t){return t==wo.arrowright||t==wo.arrowleft||t==wo.arrowup||t==wo.arrowdown}(n)?!function(t){return ko(t)==Rf}(e)?n===wo.enter&&(r=this._handleEnterKey(e.shiftKey)):r=this._selectAllNestedEditableContent()||this._selectAllContent():r=this._handleArrowKeys(o),r&&(e.preventDefault(),t.stop())}_handleDelete(t){if(this.editor.isReadOnly)return;const e=this.editor.model.document.selection;if(!e.isCollapsed)return;const n=this._getObjectElementNextToSelection(t);return n?(this.editor.model.change(t=>{let i=e.anchor.parent;for(;i.isEmpty;){const e=i;i=e.parent,t.remove(e)}this._setSelectionOverElement(n)}),!0):void 0}_handleArrowKeys(t){const e=this.editor.model,n=e.schema,i=e.document.selection,o=i.getSelectedElement();if(o&&n.isObject(o)){const o=t?i.getLastPosition():i.getFirstPosition(),r=n.getNearestSelectionRange(o,t?"forward":"backward");return r&&e.change(t=>{t.setSelection(r)}),!0}if(!i.isCollapsed)return;const r=this._getObjectElementNextToSelection(t);return r&&n.isObject(r)?(this._setSelectionOverElement(r),!0):void 0}_handleEnterKey(t){const e=this.editor.model,n=e.document.selection.getSelectedElement();if(i=n,o=e.schema,i&&o.isObject(i)&&!o.isInline(i))return e.change(i=>{let o=i.createPositionAt(n,t?"before":"after");const r=i.createElement("paragraph");if(e.schema.isBlock(n.parent)){const t=e.schema.findAllowedParent(o,r);o=i.split(o,t).position}i.insert(r,o),i.setSelection(r,"in")}),!0;var i,o}_selectAllNestedEditableContent(){const t=this.editor.model,e=t.document.selection,n=t.schema.getLimitElement(e);return e.getFirstRange().root!=n&&(t.change(t=>{t.setSelection(t.createRangeIn(n))}),!0)}_selectAllContent(){const t=this.editor.model,e=this.editor.editing,n=e.view.document.selection.getSelectedElement();if(n&&pu(n)){const i=e.mapper.toModelElement(n.parent);return t.change(t=>{t.setSelection(t.createRangeIn(i))}),!0}return!1}_setSelectionOverElement(t){this.editor.model.change(e=>{e.setSelection(e.createRangeOn(t))})}_getObjectElementNextToSelection(t){const e=this.editor.model,n=e.schema,i=e.document.selection,o=e.createSelection(i);e.modifySelection(o,{direction:t?"forward":"backward"});const r=t?o.focus.nodeBefore:o.focus.nodeAfter;return r&&n.isObject(r)?r:null}_clearPreviouslySelectedWidgets(t){for(const e of this._previouslySelected)t.removeClass(mu,e);this._previouslySelected.clear()}}function Lf(t,e){return!!e&&Array.from(t.getAncestors()).includes(e)}class jf extends Rd{refresh(){const t=this.editor.model.document.selection.getSelectedElement();this.isEnabled=xu(t),xu(t)&&t.hasAttribute("alt")?this.value=t.getAttribute("alt"):this.value=!1}execute(t){const e=this.editor.model,n=e.document.selection.getSelectedElement();e.change(e=>{e.setAttribute("alt",t.newValue,n)})}}class Vf extends Md{static get pluginName(){return"ImageTextAlternativeEditing"}init(){this.editor.commands.add("imageTextAlternative",new jf(this.editor))}}n(49);class zf extends Wl{constructor(t,e){super(t);const n=`ck-input-${Zn()}`,i=`ck-status-${Zn()}`;this.set("label"),this.set("value"),this.set("isReadOnly",!1),this.set("errorText",null),this.set("infoText",null),this.labelView=this._createLabelView(n),this.inputView=this._createInputView(e,n,i),this.statusView=this._createStatusView(i),this.bind("_statusText").to(this,"errorText",this,"infoText",(t,e)=>t||e);const o=this.bindTemplate;this.setTemplate({tag:"div",attributes:{class:["ck","ck-labeled-input",o.if("isReadOnly","ck-disabled")]},children:[this.labelView,this.inputView,this.statusView]})}_createLabelView(t){const e=new $l(this.locale);return e.for=t,e.bind("text").to(this,"label"),e}_createInputView(t,e,n){const i=new t(this.locale,n);return i.id=e,i.ariaDescribedById=n,i.bind("value").to(this),i.bind("isReadOnly").to(this),i.bind("hasError").to(this,"errorText",t=>!!t),i.on("input",()=>{this.errorText=null}),i}_createStatusView(t){const e=new Wl(this.locale),n=this.bindTemplate;return e.setTemplate({tag:"div",attributes:{class:["ck","ck-labeled-input__status",n.if("errorText","ck-labeled-input__status_error"),n.if("_statusText","ck-hidden",t=>!t)],id:t,role:n.if("errorText","alert")},children:[{text:n.to("_statusText")}]}),e}select(){this.inputView.select()}focus(){this.inputView.focus()}}n(51);class Bf extends Wl{constructor(t){super(t),this.set("value"),this.set("id"),this.set("placeholder"),this.set("isReadOnly",!1),this.set("hasError",!1),this.set("ariaDescribedById");const e=this.bindTemplate;this.setTemplate({tag:"input",attributes:{type:"text",class:["ck","ck-input","ck-input-text",e.if("hasError","ck-error")],id:e.to("id"),placeholder:e.to("placeholder"),readonly:e.to("isReadOnly"),"aria-invalid":e.if("hasError",!0),"aria-describedby":e.to("ariaDescribedById")},on:{input:e.to("input")}})}render(){super.render();const t=t=>{this.element.value=t||0===t?t:""};t(this.value),this.on("change:value",(e,n,i)=>{t(i)})}select(){this.element.select()}focus(){this.element.focus()}}function Ff({view:t}){t.listenTo(t.element,"submit",(e,n)=>{n.preventDefault(),t.fire("submit")},{useCapture:!0})}var Uf='',Hf='';n(53);class qf extends Wl{constructor(t){super(t);const e=this.locale.t;this.focusTracker=new ml,this.keystrokes=new sl,this.labeledInput=this._createLabeledInputView(),this.saveButtonView=this._createButton(e("bc"),Uf,"ck-button-save"),this.saveButtonView.type="submit",this.cancelButtonView=this._createButton(e("bd"),Hf,"ck-button-cancel","cancel"),this._focusables=new Al,this._focusCycler=new td({focusables:this._focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}}),this.setTemplate({tag:"form",attributes:{class:["ck","ck-text-alternative-form"],tabindex:"-1"},children:[this.labeledInput,this.saveButtonView,this.cancelButtonView]})}render(){super.render(),this.keystrokes.listenTo(this.element),Ff({view:this}),[this.labeledInput,this.saveButtonView,this.cancelButtonView].forEach(t=>{this._focusables.add(t),this.focusTracker.add(t.element)})}_createButton(t,e,n,i){const o=new ud(this.locale);return o.set({label:t,icon:e,tooltip:!0}),o.extendTemplate({attributes:{class:n}}),i&&o.delegate("execute").to(this,i),o}_createLabeledInputView(){const t=this.locale.t,e=new zf(this.locale,Bf);return e.label=t("br"),e.inputView.placeholder=t("br"),e}}n(55);const Wf=Jl("px"),Yf=ir.document.body;class $f extends Wl{constructor(t){super(t);const e=this.bindTemplate;this.set("top",0),this.set("left",0),this.set("position","arrow_nw"),this.set("isVisible",!1),this.set("withArrow",!0),this.set("class"),this.content=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-balloon-panel",e.to("position",t=>`ck-balloon-panel_${t}`),e.if("isVisible","ck-balloon-panel_visible"),e.if("withArrow","ck-balloon-panel_with-arrow"),e.to("class")],style:{top:e.to("top",Wf),left:e.to("left",Wf)}},children:this.content})}show(){this.isVisible=!0}hide(){this.isVisible=!1}attachTo(t){this.show();const e=$f.defaultPositions,n=Object.assign({},{element:this.element,positions:[e.southArrowNorth,e.southArrowNorthWest,e.southArrowNorthEast,e.northArrowSouth,e.northArrowSouthWest,e.northArrowSouthEast],limiter:Yf,fitInViewport:!0},t),i=$f._getOptimalPosition(n),o=parseInt(i.left),r=parseInt(i.top),s=i.name;Object.assign(this,{top:r,left:o,position:s})}pin(t){this.unpin(),this._pinWhenIsVisibleCallback=()=>{this.isVisible?this._startPinning(t):this._stopPinning()},this._startPinning(t),this.listenTo(this,"change:isVisible",this._pinWhenIsVisibleCallback)}unpin(){this._pinWhenIsVisibleCallback&&(this._stopPinning(),this.stopListening(this,"change:isVisible",this._pinWhenIsVisibleCallback),this._pinWhenIsVisibleCallback=null,this.hide())}_startPinning(t){this.attachTo(t);const e=Gf(t.target),n=t.limiter?Gf(t.limiter):Yf;this.listenTo(ir.document,"scroll",(i,o)=>{const r=o.target,s=e&&r.contains(e),a=n&&r.contains(n);!s&&!a&&e&&n||this.attachTo(t)},{useCapture:!0}),this.listenTo(ir.window,"resize",()=>{this.attachTo(t)})}_stopPinning(){this.stopListening(ir.document,"scroll"),this.stopListening(ir.window,"resize")}}function Gf(t){return Yn(t)?t:As(t)?t.commonAncestorContainer:"function"==typeof t?Gf(t()):null}function Qf(t,e){return t.top-e.height-$f.arrowVerticalOffset}function Kf(t){return t.bottom+$f.arrowVerticalOffset}$f.arrowHorizontalOffset=25,$f.arrowVerticalOffset=10,$f._getOptimalPosition=sd,$f.defaultPositions={northArrowSouth:(t,e)=>({top:Qf(t,e),left:t.left+t.width/2-e.width/2,name:"arrow_s"}),northArrowSouthEast:(t,e)=>({top:Qf(t,e),left:t.left+t.width/2-e.width+$f.arrowHorizontalOffset,name:"arrow_se"}),northArrowSouthWest:(t,e)=>({top:Qf(t,e),left:t.left+t.width/2-$f.arrowHorizontalOffset,name:"arrow_sw"}),northWestArrowSouth:(t,e)=>({top:Qf(t,e),left:t.left-e.width/2,name:"arrow_s"}),northWestArrowSouthWest:(t,e)=>({top:Qf(t,e),left:t.left-$f.arrowHorizontalOffset,name:"arrow_sw"}),northWestArrowSouthEast:(t,e)=>({top:Qf(t,e),left:t.left-e.width+$f.arrowHorizontalOffset,name:"arrow_se"}),northEastArrowSouth:(t,e)=>({top:Qf(t,e),left:t.right-e.width/2,name:"arrow_s"}),northEastArrowSouthEast:(t,e)=>({top:Qf(t,e),left:t.right-e.width+$f.arrowHorizontalOffset,name:"arrow_se"}),northEastArrowSouthWest:(t,e)=>({top:Qf(t,e),left:t.right-$f.arrowHorizontalOffset,name:"arrow_sw"}),southArrowNorth:(t,e)=>({top:Kf(t),left:t.left+t.width/2-e.width/2,name:"arrow_n"}),southArrowNorthEast:(t,e)=>({top:Kf(t),left:t.left+t.width/2-e.width+$f.arrowHorizontalOffset,name:"arrow_ne"}),southArrowNorthWest:(t,e)=>({top:Kf(t),left:t.left+t.width/2-$f.arrowHorizontalOffset,name:"arrow_nw"}),southWestArrowNorth:(t,e)=>({top:Kf(t),left:t.left-e.width/2,name:"arrow_n"}),southWestArrowNorthWest:(t,e)=>({top:Kf(t),left:t.left-$f.arrowHorizontalOffset,name:"arrow_nw"}),southWestArrowNorthEast:(t,e)=>({top:Kf(t),left:t.left-e.width+$f.arrowHorizontalOffset,name:"arrow_ne"}),southEastArrowNorth:(t,e)=>({top:Kf(t),left:t.right-e.width/2,name:"arrow_n"}),southEastArrowNorthEast:(t,e)=>({top:Kf(t),left:t.right-e.width+$f.arrowHorizontalOffset,name:"arrow_ne"}),southEastArrowNorthWest:(t,e)=>({top:Kf(t),left:t.right-$f.arrowHorizontalOffset,name:"arrow_nw"})};var Jf='\n',Zf='\n';n(57),n(59);const Xf=Jl("px");class tg extends Md{static get pluginName(){return"ContextualBalloon"}constructor(t){super(t),this.positionLimiter=()=>{const t=this.editor.editing.view,e=t.document.selection.editableElement;return e?t.domConverter.mapViewToDom(e.root):null},this.set("visibleView",null),this.view=new $f(t.locale),t.ui.view.body.add(this.view),t.ui.focusTracker.add(this.view.element),this._viewToStack=new Map,this._idToStack=new Map,this.set("_numberOfStacks",0),this.set("_singleViewMode",!1),this._rotatorView=this._createRotatorView(),this._fakePanelsView=this._createFakePanelsView()}hasView(t){return Array.from(this._viewToStack.keys()).includes(t)}add(t){if(this.hasView(t.view))throw new Qn.b("contextualballoon-add-view-exist: Cannot add configuration of the same view twice.",[this,t]);const e=t.stackId||"main";if(!this._idToStack.has(e))return this._idToStack.set(e,new Map([[t.view,t]])),this._viewToStack.set(t.view,this._idToStack.get(e)),this._numberOfStacks=this._idToStack.size,void(this._visibleStack&&!t.singleViewMode||this.showStack(e));const n=this._idToStack.get(e);t.singleViewMode&&this.showStack(e),n.set(t.view,t),this._viewToStack.set(t.view,n),n===this._visibleStack&&this._showView(t)}remove(t){if(!this.hasView(t))throw new Qn.b("contextualballoon-remove-view-not-exist: Cannot remove the configuration of a non-existent view.",[this,t]);const e=this._viewToStack.get(t);this._singleViewMode&&this.visibleView===t&&(this._singleViewMode=!1),this.visibleView===t&&(1===e.size?this._idToStack.size>1?this._showNextStack():(this.view.hide(),this.visibleView=null,this._rotatorView.hideView()):this._showView(Array.from(e.values())[e.size-2])),1===e.size?(this._idToStack.delete(this._getStackId(e)),this._numberOfStacks=this._idToStack.size):e.delete(t),this._viewToStack.delete(t)}updatePosition(t){t&&(this._visibleStack.get(this.visibleView).position=t),this.view.pin(this._getBalloonPosition()),this._fakePanelsView.updatePosition()}showStack(t){this.visibleStack=t;const e=this._idToStack.get(t);if(!e)throw new Qn.b("contextualballoon-showstack-stack-not-exist: Cannot show a stack that does not exist.",this);this._visibleStack!==e&&this._showView(Array.from(e.values()).pop())}get _visibleStack(){return this._viewToStack.get(this.visibleView)}_getStackId(t){return Array.from(this._idToStack.entries()).find(e=>e[1]===t)[0]}_showNextStack(){const t=Array.from(this._idToStack.values());let e=t.indexOf(this._visibleStack)+1;t[e]||(e=0),this.showStack(this._getStackId(t[e]))}_showPrevStack(){const t=Array.from(this._idToStack.values());let e=t.indexOf(this._visibleStack)-1;t[e]||(e=t.length-1),this.showStack(this._getStackId(t[e]))}_createRotatorView(){const t=new eg(this.editor.locale),e=this.editor.locale.t;return this.view.content.add(t),t.bind("isNavigationVisible").to(this,"_numberOfStacks",this,"_singleViewMode",(t,e)=>!e&&t>1),t.on("change:isNavigationVisible",()=>this.updatePosition(),{priority:"low"}),t.bind("counter").to(this,"visibleView",this,"_numberOfStacks",(t,n)=>{if(n<2)return"";const i=Array.from(this._idToStack.values()).indexOf(this._visibleStack)+1;return e("bm",[i,n])}),t.buttonNextView.on("execute",()=>{t.focusTracker.isFocused&&this.editor.editing.view.focus(),this._showNextStack()}),t.buttonPrevView.on("execute",()=>{t.focusTracker.isFocused&&this.editor.editing.view.focus(),this._showPrevStack()}),t}_createFakePanelsView(){const t=new ng(this.editor.locale,this.view);return t.bind("numberOfPanels").to(this,"_numberOfStacks",this,"_singleViewMode",(t,e)=>{return!e&&t>=2?Math.min(t-1,2):0}),t.listenTo(this.view,"change:top",()=>t.updatePosition()),t.listenTo(this.view,"change:left",()=>t.updatePosition()),this.editor.ui.view.body.add(t),t}_showView({view:t,balloonClassName:e="",withArrow:n=!0,singleViewMode:i=!1}){this.view.class=e,this.view.withArrow=n,this._rotatorView.showView(t),this.visibleView=t,this.view.pin(this._getBalloonPosition()),this._fakePanelsView.updatePosition(),i&&(this._singleViewMode=!0)}_getBalloonPosition(){let t=Array.from(this._visibleStack.values()).pop().position;return t&&!t.limiter&&(t=Object.assign({},t,{limiter:this.positionLimiter})),t}}class eg extends Wl{constructor(t){super(t);const e=t.t,n=this.bindTemplate;this.set("isNavigationVisible",!0),this.focusTracker=new ml,this.buttonPrevView=this._createButtonView(e("bn"),Jf),this.buttonNextView=this._createButtonView(e("bo"),Zf),this.content=this.createCollection(),this.setTemplate({tag:"div",attributes:{class:["ck","ck-balloon-rotator"],"z-index":"-1"},children:[{tag:"div",attributes:{class:["ck-balloon-rotator__navigation",n.to("isNavigationVisible",t=>t?"":"ck-hidden")]},children:[this.buttonPrevView,{tag:"span",attributes:{class:["ck-balloon-rotator__counter"]},children:[{text:n.to("counter")}]},this.buttonNextView]},{tag:"div",attributes:{class:"ck-balloon-rotator__content"},children:this.content}]})}render(){super.render(),this.focusTracker.add(this.element)}showView(t){this.hideView(),this.content.add(t)}hideView(){this.content.clear()}_createButtonView(t,e){const n=new ud(this.locale);return n.set({label:t,icon:e,tooltip:!0}),n}}class ng extends Wl{constructor(t,e){super(t);const n=this.bindTemplate;this.set("top",0),this.set("left",0),this.set("height",0),this.set("width",0),this.set("numberOfPanels",0),this.content=this.createCollection(),this._balloonPanelView=e,this.setTemplate({tag:"div",attributes:{class:["ck-fake-panel",n.to("numberOfPanels",t=>t?"":"ck-hidden")],style:{top:n.to("top",Xf),left:n.to("left",Xf),width:n.to("width",Xf),height:n.to("height",Xf)}},children:this.content}),this.on("change:numberOfPanels",(t,e,n,i)=>{n>i?this._addPanels(n-i):this._removePanels(i-n),this.updatePosition()})}_addPanels(t){for(;t--;){const t=new Wl;t.setTemplate({tag:"div"}),this.content.add(t),this.registerChild(t)}}_removePanels(t){for(;t--;){const t=this.content.last;this.content.remove(t),this.deregisterChild(t),t.destroy()}}updatePosition(){if(this.numberOfPanels){const{top:t,left:e}=this._balloonPanelView,{width:n,height:i}=new Ps(this._balloonPanelView.element);Object.assign(this,{top:t,left:e,width:n,height:i})}}}var ig='';function og(t){const e=t.editing.view,n=$f.defaultPositions;return{target:e.domConverter.viewToDom(e.document.selection.getSelectedElement()),positions:[n.northArrowSouth,n.northArrowSouthWest,n.northArrowSouthEast,n.southArrowNorth,n.southArrowNorthWest,n.southArrowNorthEast]}}class rg extends Md{static get requires(){return[tg]}static get pluginName(){return"ImageTextAlternativeUI"}init(){this._createButton(),this._createForm()}destroy(){super.destroy(),this._form.destroy()}_createButton(){const t=this.editor,e=t.t;t.ui.componentFactory.add("imageTextAlternative",n=>{const i=t.commands.get("imageTextAlternative"),o=new ud(n);return o.set({label:e("at"),icon:ig,tooltip:!0}),o.bind("isEnabled").to(i,"isEnabled"),this.listenTo(o,"execute",()=>this._showForm()),o})}_createForm(){const t=this.editor,e=t.editing.view.document;this._balloon=this.editor.plugins.get("ContextualBalloon"),this._form=new qf(t.locale),this._form.render(),this.listenTo(this._form,"submit",()=>{t.execute("imageTextAlternative",{newValue:this._form.labeledInput.inputView.element.value}),this._hideForm(!0)}),this.listenTo(this._form,"cancel",()=>{this._hideForm(!0)}),this._form.keystrokes.set("Esc",(t,e)=>{this._hideForm(!0),e()}),this.listenTo(t.ui,"update",()=>{yu(e.selection)?this._isVisible&&function(t){const e=t.plugins.get("ContextualBalloon");if(yu(t.editing.view.document.selection)){const n=og(t);e.updatePosition(n)}}(t):this._hideForm(!0)}),kd({emitter:this._form,activator:()=>this._isVisible,contextElements:[this._balloon.view.element],callback:()=>this._hideForm()})}_showForm(){if(this._isVisible)return;const t=this.editor,e=t.commands.get("imageTextAlternative"),n=this._form.labeledInput;this._isInBalloon||this._balloon.add({view:this._form,position:og(t)}),n.value=n.inputView.element.value=e.value||"",this._form.labeledInput.select()}_hideForm(t){this._isInBalloon&&(this._form.focusTracker.isFocused&&this._form.saveButtonView.focus(),this._balloon.remove(this._form),t&&this.editor.editing.view.focus())}get _isVisible(){return this._balloon.visibleView===this._form}get _isInBalloon(){return this._balloon.hasView(this._form)}}class sg extends Md{static get requires(){return[Vf,rg]}static get pluginName(){return"ImageTextAlternative"}}n(61);class ag extends Md{static get requires(){return[Pu,Df,sg]}static get pluginName(){return"Image"}}class cg extends Wl{constructor(t){super(t),this.buttonView=new ud(t),this._fileInputView=new lg(t),this._fileInputView.bind("acceptedType").to(this),this._fileInputView.bind("allowMultipleFiles").to(this),this._fileInputView.delegate("done").to(this),this.setTemplate({tag:"span",attributes:{class:"ck-file-dialog-button"},children:[this.buttonView,this._fileInputView]}),this.buttonView.on("execute",()=>{this._fileInputView.open()})}focus(){this.buttonView.focus()}}class lg extends Wl{constructor(t){super(t),this.set("acceptedType"),this.set("allowMultipleFiles",!1);const e=this.bindTemplate;this.setTemplate({tag:"input",attributes:{class:["ck-hidden"],type:"file",tabindex:"-1",accept:e.to("acceptedType"),multiple:e.to("allowMultipleFiles")},on:{change:e.to(()=>{this.element&&this.element.files&&this.element.files.length&&this.fire("done",this.element.files),this.element.value=""})}})}open(){this.element.click()}}var dg='';function hg(t){const e=t.map(t=>t.replace("+","\\+"));return new RegExp(`^image\\/(${e.join("|")})$`)}function ug(t){return new Promise((e,n)=>{const i=t.getAttribute("src");fetch(i).then(t=>t.blob()).then(t=>{const o=function(t,e){return t.type?t.type:e.match(/data:(image\/\w+);base64/)?e.match(/data:(image\/\w+);base64/)[1].toLowerCase():"image/jpeg"}(t,i),r=function(t,e,n){try{return new File([t],e,{type:n})}catch(t){return null}}(t,`image.${o.replace("image/","")}`,o);r?e(r):n()}).catch(n)})}class fg extends Md{init(){const t=this.editor,e=t.t;t.ui.componentFactory.add("imageUpload",n=>{const i=new cg(n),o=t.commands.get("imageUpload"),r=t.config.get("image.upload.types"),s=hg(r);return i.set({acceptedType:r.map(t=>`image/${t}`).join(","),allowMultipleFiles:!0}),i.buttonView.set({label:e("al"),icon:dg,tooltip:!0}),i.buttonView.bind("isEnabled").to(o),i.on("done",(e,n)=>{const i=Array.from(n).filter(t=>s.test(t.type));i.length&&t.execute("imageUpload",{file:i})}),i})}}var gg='';n(63),n(65),n(67);class mg extends Md{constructor(t){super(t),this.placeholder="data:image/svg+xml;utf8,"+encodeURIComponent(gg)}init(){this.editor.editing.downcastDispatcher.on("attribute:uploadStatus:image",(...t)=>this.uploadStatusChange(...t))}uploadStatusChange(t,e,n){const i=this.editor,o=e.item,r=o.getAttribute("uploadId");if(!n.consumable.consume(e.item,t.name))return;const s=i.plugins.get(Sh),a=r?e.attributeNewValue:null,c=this.placeholder,l=i.editing.mapper.toViewElement(o),d=n.writer;if("reading"==a)return pg(l,d),void bg(c,l,d);if("uploading"==a){const t=s.loaders.get(r);return pg(l,d),void(t?(wg(l,d),function(t,e,n,i){const o=function(t){const e=t.createUIElement("div",{class:"ck-progress-bar"});return t.setCustomProperty("progressBar",!0,e),e}(e);e.insert(e.createPositionAt(t,"end"),o),n.on("change:uploadedPercent",(t,e,n)=>{i.change(t=>{t.setStyle("width",n+"%",o)})})}(l,d,t,i.editing.view),function(t,e,n){if(n.data){const i=t.getChild(0);e.setAttribute("src",n.data,i)}}(l,d,t)):bg(c,l,d))}"complete"==a&&s.loaders.get(r)&&!mo.isEdge&&function(t,e,n){const i=e.createUIElement("div",{class:"ck-image-upload-complete-icon"});e.insert(e.createPositionAt(t,"end"),i),setTimeout(()=>{n.change(t=>t.remove(t.createRangeOn(i)))},3e3)}(l,d,i.editing.view),function(t,e){_g(t,e,"progressBar")}(l,d),wg(l,d),function(t,e){e.removeClass("ck-appear",t)}(l,d)}}function pg(t,e){t.hasClass("ck-appear")||e.addClass("ck-appear",t)}function bg(t,e,n){e.hasClass("ck-image-upload-placeholder")||n.addClass("ck-image-upload-placeholder",e);const i=e.getChild(0);i.getAttribute("src")!==t&&n.setAttribute("src",t,i),kg(e,"placeholder")||n.insert(n.createPositionAfter(i),function(t){const e=t.createUIElement("div",{class:"ck-upload-placeholder-loader"});return t.setCustomProperty("placeholder",!0,e),e}(n))}function wg(t,e){t.hasClass("ck-image-upload-placeholder")&&e.removeClass("ck-image-upload-placeholder",t),_g(t,e,"placeholder")}function kg(t,e){for(const n of t.getChildren())if(n.getCustomProperty(e))return n}function _g(t,e,n){const i=kg(t,n);i&&e.remove(e.createRangeOn(i))}class vg{createDocumentFragment(t){return new Co(t)}createElement(t,e,n){return new _i(t,e,n)}createText(t){return new gi(t)}clone(t,e=!1){return t._clone(e)}appendChild(t,e){return e._appendChild(t)}insertChild(t,e,n){return n._insertChild(t,e)}removeChildren(t,e,n){return n._removeChildren(t,e)}remove(t){const e=t.parent;return e?this.removeChildren(e.getChildIndex(t),1,e):[]}replace(t,e){const n=t.parent;if(n){const i=n.getChildIndex(t);return this.removeChildren(i,1,n),this.insertChild(i,e,n),!0}return!1}unwrapElement(t){const e=t.parent;if(e){const n=e.getChildIndex(t);this.remove(t),this.insertChild(n,t.getChildren(),e)}}rename(t,e){const n=new _i(t,e.getAttributes(),e.getChildren());return this.replace(e,n)?n:null}setAttribute(t,e,n){n._setAttribute(t,e)}removeAttribute(t,e){e._removeAttribute(t)}addClass(t,e){e._addClass(t)}removeClass(t,e){e._removeClass(t)}setStyle(t,e,n){T(t)&&void 0===n&&(n=e),n._setStyle(t,e)}removeStyle(t,e){e._removeStyle(t)}setCustomProperty(t,e,n){n._setCustomProperty(t,e)}removeCustomProperty(t,e){return e._removeCustomProperty(t)}createPositionAt(t,e){return Xi._createAt(t,e)}createPositionAfter(t){return Xi._createAfter(t)}createPositionBefore(t){return Xi._createBefore(t)}createRange(t,e){return new to(t,e)}createRangeOn(t){return to._createOn(t)}createRangeIn(t){return to._createIn(t)}createSelection(t,e,n){return new io(t,e,n)}}class yg extends Rd{refresh(){this.isEnabled=Tu(this.editor.model)}execute(t){const e=this.editor,n=e.model,i=e.plugins.get(Sh);n.change(e=>{const o=Array.isArray(t.file)?t.file:[t.file];for(const t of o)xg(e,n,i,t)})}}function xg(t,e,n,i){const o=n.createLoader(i);o&&Au(t,e,{uploadId:o.id})}class Ag extends Md{static get requires(){return[Sh,vf,Od]}static get pluginName(){return"ImageUploadEditing"}constructor(t){super(t),t.config.define("image",{upload:{types:["jpeg","png","gif","bmp","webp","tiff"]}})}init(){const t=this.editor,e=t.model.document,n=t.model.schema,i=t.conversion,o=t.plugins.get(Sh),r=hg(t.config.get("image.upload.types"));n.extend("image",{allowAttributes:["uploadId","uploadStatus"]}),t.commands.add("imageUpload",new yg(t)),i.for("upcast").attributeToAttribute({view:{name:"img",key:"uploadId"},model:"uploadId"}),this.listenTo(t.editing.view.document,"clipboardInput",(e,n)=>{if(function(t){return Array.from(t.types).includes("text/html")&&""!==t.getData("text/html")}(n.dataTransfer))return;const i=Array.from(n.dataTransfer.files).filter(t=>!!t&&r.test(t.type)),o=n.targetRanges.map(e=>t.editing.mapper.toModelRange(e));t.model.change(n=>{n.setSelection(o),i.length&&(e.stop(),t.model.enqueueChange("default",()=>{t.execute("imageUpload",{file:i})}))})}),this.listenTo(t.plugins.get(Od),"inputTransformation",(e,n)=>{const i=Array.from(t.editing.view.createRangeIn(n.content)).filter(t=>(function(t){return!(!t.is("element","img")||!t.getAttribute("src"))&&(t.getAttribute("src").match(/^data:image\/\w+;base64,/g)||t.getAttribute("src").match(/^blob:/g))})(t.item)&&!t.item.getAttribute("uploadProcessed")).map(t=>({promise:ug(t.item),imageElement:t.item}));if(!i.length)return;const r=new vg;for(const t of i){r.setAttribute("uploadProcessed",!0,t.imageElement);const e=o.createLoader(t.promise);e&&(r.setAttribute("src","",t.imageElement),r.setAttribute("uploadId",e.id,t.imageElement))}}),t.editing.view.document.on("dragover",(t,e)=>{e.preventDefault()}),e.on("change",()=>{const n=e.differ.getChanges({includeChangesInGraveyard:!0});for(const e of n)if("insert"==e.type&&"$text"!=e.name){const n=e.position.nodeAfter,i="$graveyard"==e.position.root.rootName;for(const e of Tg(t,n)){const t=e.getAttribute("uploadId");if(!t)continue;const n=o.loaders.get(t);n&&(i?n.abort():"idle"==n.status&&this._readAndUpload(n,e))}}})}_readAndUpload(t,e){const n=this.editor,i=n.model,o=n.locale.t,r=n.plugins.get(Sh),s=n.plugins.get(vf);return i.enqueueChange("transparent",t=>{t.setAttribute("uploadStatus","reading",e)}),t.read().then(()=>{const o=t.upload();if(mo.isSafari){const t=n.editing.mapper.toViewElement(e).getChild(0);n.editing.view.once("render",()=>{if(!t.parent)return;const e=n.editing.view.domConverter.mapViewToDom(t.parent);if(!e)return;const i=e.style.display;e.style.display="none",e._ckHack=e.offsetHeight,e.style.display=i})}return i.enqueueChange("transparent",t=>{t.setAttribute("uploadStatus","uploading",e)}),o}).then(t=>{i.enqueueChange("transparent",n=>{n.setAttributes({uploadStatus:"complete",src:t.default},e),this._parseAndSetSrcsetAttributeOnImage(t,e,n)}),a()}).catch(n=>{if("error"!==t.status&&"aborted"!==t.status)throw n;"error"==t.status&&n&&s.showWarning(n,{title:o("an"),namespace:"upload"}),a(),i.enqueueChange("transparent",t=>{t.remove(e)})});function a(){i.enqueueChange("transparent",t=>{t.removeAttribute("uploadId",e),t.removeAttribute("uploadStatus",e)}),r.destroyLoader(t)}}_parseAndSetSrcsetAttributeOnImage(t,e,n){let i=0;const o=Object.keys(t).filter(t=>{const e=parseInt(t,10);if(!isNaN(e))return i=Math.max(i,e),!0}).map(e=>`${t[e]} ${e}w`).join(", ");""!=o&&n.setAttribute("srcset",{data:o,width:i},e)}}function Tg(t,e){return Array.from(t.model.createRangeOn(e)).filter(t=>t.item.is("image")).map(t=>t.item)}class Cg extends Md{static get pluginName(){return"ImageUpload"}static get requires(){return[Ag,fg,mg]}}class Pg extends Rd{refresh(){const t=this.editor.model,e=Jh(t.document.selection.getSelectedBlocks());this.value=!!e&&e.is("paragraph"),this.isEnabled=!!e&&Sg(e,t.schema)}execute(t={}){const e=this.editor.model,n=e.document;e.change(i=>{const o=(t.selection||n.selection).getSelectedBlocks();for(const t of o)!t.is("paragraph")&&Sg(t,e.schema)&&i.rename(t,"paragraph")})}}function Sg(t,e){return e.checkChild(t.parent,"paragraph")&&!e.isObject(t)}class Mg extends Md{static get pluginName(){return"Paragraph"}init(){const t=this.editor,e=t.model,n=t.data;t.commands.add("paragraph",new Pg(t)),e.schema.register("paragraph",{inheritAllFrom:"$block"}),t.conversion.elementToElement({model:"paragraph",view:"p"}),t.conversion.for("upcast").elementToElement({model:(t,e)=>Mg.paragraphLikeElements.has(t.name)?t.isEmpty?null:e.createElement("paragraph"):null,converterPriority:"low"}),n.upcastDispatcher.on("element",(t,e,n)=>{n.consumable.test(e.viewItem,{name:e.viewItem.name})&&Ig(e.viewItem,e.modelCursor,n.schema)&&Object.assign(e,Eg(e.viewItem,e.modelCursor,n))},{priority:"low"}),n.upcastDispatcher.on("text",(t,e,n)=>{e.modelRange||Ig(e.viewItem,e.modelCursor,n.schema)&&Object.assign(e,Eg(e.viewItem,e.modelCursor,n))},{priority:"lowest"}),e.document.registerPostFixer(t=>this._autoparagraphEmptyRoots(t)),t.data.on("ready",()=>{e.enqueueChange("transparent",t=>this._autoparagraphEmptyRoots(t))},{priority:"lowest"})}_autoparagraphEmptyRoots(t){const e=this.editor.model;for(const n of e.document.getRootNames()){const i=e.document.getRoot(n);if(i.isEmpty&&"$graveyard"!=i.rootName&&e.schema.checkChild(i,"paragraph"))return t.insertElement("paragraph",i),!0}}}function Eg(t,e,n){const i=n.writer.createElement("paragraph");return n.writer.insert(i,e),n.convertItem(t,n.writer.createPositionAt(i,0))}function Ig(t,e,n){const i=n.createContext(e);return!!n.checkChild(i,"paragraph")&&!!n.checkChild(i.push("paragraph"),t)}Mg.paragraphLikeElements=new Set(["blockquote","dd","div","dt","h1","h2","h3","h4","h5","h6","li","p","td"]);class Ng extends Rd{constructor(t,e){super(t),this.modelElements=e}refresh(){const t=Jh(this.editor.model.document.selection.getSelectedBlocks());this.value=!!t&&this.modelElements.includes(t.name)&&t.name,this.isEnabled=!!t&&this.modelElements.some(e=>Og(t,e,this.editor.model.schema))}execute(t){const e=this.editor.model,n=e.document,i=t.value;e.change(t=>{const o=Array.from(n.selection.getSelectedBlocks()).filter(t=>Og(t,i,e.schema));for(const e of o)e.is(i)||t.rename(e,i)})}}function Og(t,e,n){return n.checkChild(t.parent,e)&&!n.isObject(t)}const Rg="paragraph";class Dg extends Md{static get pluginName(){return"HeadingEditing"}constructor(t){super(t),t.config.define("heading",{options:[{model:"paragraph",title:"Paragraph",class:"ck-heading_paragraph"},{model:"heading1",view:"h2",title:"Heading 1",class:"ck-heading_heading1"},{model:"heading2",view:"h3",title:"Heading 2",class:"ck-heading_heading2"},{model:"heading3",view:"h4",title:"Heading 3",class:"ck-heading_heading3"}]})}static get requires(){return[Mg]}init(){const t=this.editor,e=t.config.get("heading.options"),n=[];for(const i of e)i.model!==Rg&&(t.model.schema.register(i.model,{inheritAllFrom:"$block"}),t.conversion.elementToElement(i),n.push(i.model));this._addDefaultH1Conversion(t),t.commands.add("heading",new Ng(t,n))}afterInit(){const t=this.editor,e=t.commands.get("enter"),n=t.config.get("heading.options");e&&this.listenTo(e,"afterExecute",(e,i)=>{const o=t.model.document.selection.getFirstPosition().parent;n.some(t=>o.is(t.model))&&!o.is(Rg)&&0===o.childCount&&i.writer.rename(o,Rg)})}_addDefaultH1Conversion(t){t.conversion.for("upcast").elementToElement({model:"heading1",view:"h1",converterPriority:Xn.get("low")+1})}}class Lg{constructor(t,e){e&&ji(this,e),t&&this.set(t)}}li(Lg,Ui);n(10);class jg extends Md{init(){const t=this.editor,e=t.t,n=function(t){const e=t.t,n={Paragraph:e("bt"),"Heading 1":e("bu"),"Heading 2":e("bv"),"Heading 3":e("bw"),"Heading 4":e("bx"),"Heading 5":e("by"),"Heading 6":e("bz")};return t.config.get("heading.options").map(t=>{const e=n[t.title];return e&&e!=t.title&&(t.title=e),t})}(t),i=e("m"),o=e("n");t.ui.componentFactory.add("heading",e=>{const r={},s=new ro,a=t.commands.get("heading"),c=t.commands.get("paragraph"),l=[a];for(const t of n){const e={type:"button",model:new Lg({label:t.title,class:t.class,withText:!0})};"paragraph"===t.model?(e.model.bind("isOn").to(c,"value"),e.model.set("commandName","paragraph"),l.push(c)):(e.model.bind("isOn").to(a,"value",e=>e===t.model),e.model.set({commandName:"heading",commandValue:t.model})),s.add(e),r[t.model]=t.title}const d=_d(e);return vd(d,s),d.buttonView.set({isOn:!1,withText:!0,tooltip:o}),d.extendTemplate({attributes:{class:["ck-heading-dropdown"]}}),d.bind("isEnabled").toMany(l,"isEnabled",(...t)=>t.some(t=>t)),d.buttonView.bind("label").to(a,"value",c,"value",(t,e)=>{const n=t||e&&"paragraph";return r[n]?r[n]:i}),this.listenTo(d,"execute",e=>{t.execute(e.source.commandName,e.source.commandValue?{value:e.source.commandValue}:void 0),t.editing.view.focus()}),d})}}function Vg(t){for(const e of t.getChildren())if(e&&e.is("caption"))return e;return null}function zg(t){const e=t.parent;return"figcaption"==t.name&&e&&"figure"==e.name&&e.hasClass("image")?{name:!0}:null}class Bg extends Md{static get pluginName(){return"ImageCaptionEditing"}init(){const t=this.editor,e=t.editing.view,n=t.model.schema,i=t.data,o=t.editing,r=t.t;n.register("caption",{allowIn:"image",allowContentOf:"$block",isLimit:!0}),t.model.document.registerPostFixer(t=>this._insertMissingModelCaptionElement(t)),t.conversion.for("upcast").elementToElement({view:zg,model:"caption"});i.downcastDispatcher.on("insert:caption",Fg(t=>t.createContainerElement("figcaption"),!1));const s=function(t,e){return n=>{const i=n.createEditableElement("figcaption");return n.setCustomProperty("imageCaption",!0,i),wl({view:t,element:i,text:e}),ku(i,n)}}(e,r("am"));o.downcastDispatcher.on("insert:caption",Fg(s)),o.downcastDispatcher.on("insert",this._fixCaptionVisibility(t=>t.item),{priority:"high"}),o.downcastDispatcher.on("remove",this._fixCaptionVisibility(t=>t.position.parent),{priority:"high"}),e.document.registerPostFixer(t=>this._updateCaptionVisibility(t))}_updateCaptionVisibility(t){const e=this.editor.editing.mapper,n=this._lastSelectedCaption;let i;const o=this.editor.model.document.selection,r=o.getSelectedElement();if(r&&r.is("image")){const t=Vg(r);i=e.toViewElement(t)}const s=Ug(o.getFirstPosition().parent);if(s&&(i=e.toViewElement(s)),i)return n?n===i?qg(i,t):(Hg(n,t),this._lastSelectedCaption=i,qg(i,t)):(this._lastSelectedCaption=i,qg(i,t));if(n){const e=Hg(n,t);return this._lastSelectedCaption=null,e}return!1}_fixCaptionVisibility(t){return(e,n,i)=>{const o=Ug(t(n)),r=this.editor.editing.mapper,s=i.writer;if(o){const t=r.toViewElement(o);t&&(o.childCount?s.removeClass("ck-hidden",t):s.addClass("ck-hidden",t))}}}_insertMissingModelCaptionElement(t){const e=this.editor.model,n=e.document.differ.getChanges(),i=[];for(const t of n)if("insert"==t.type&&"$text"!=t.name){const n=t.position.nodeAfter;if(n.is("image")&&!Vg(n)&&i.push(n),!n.is("image")&&n.childCount)for(const t of e.createRangeIn(n).getItems())t.is("image")&&!Vg(t)&&i.push(t)}for(const e of i)t.appendElement("caption",e);return!!i.length}}function Fg(t,e=!0){return(n,i,o)=>{const r=i.item;if((r.childCount||e)&&xu(r.parent)){if(!o.consumable.consume(i.item,"insert"))return;const e=o.mapper.toViewElement(i.range.start.parent),n=t(o.writer),s=o.writer;r.childCount||s.addClass("ck-hidden",n),function(t,e,n,i){const o=i.writer.createPositionAt(n,"end");i.writer.insert(o,t),i.mapper.bindElements(e,t)}(n,i.item,e,o)}}}function Ug(t){const e=t.getAncestors({includeSelf:!0}).find(t=>"caption"==t.name);return e&&e.parent&&"image"==e.parent.name?e:null}function Hg(t,e){return!t.childCount&&!t.hasClass("ck-hidden")&&(e.addClass("ck-hidden",t),!0)}function qg(t,e){return!!t.hasClass("ck-hidden")&&(e.removeClass("ck-hidden",t),!0)}n(70);class Wg extends Rd{constructor(t,e){super(t),this.defaultStyle=!1,this.styles=e.reduce((t,e)=>(t[e.name]=e,e.isDefault&&(this.defaultStyle=e.name),t),{})}refresh(){const t=this.editor.model.document.selection.getSelectedElement();if(this.isEnabled=xu(t),t)if(t.hasAttribute("imageStyle")){const e=t.getAttribute("imageStyle");this.value=!!this.styles[e]&&e}else this.value=this.defaultStyle;else this.value=!1}execute(t){const e=t.value,n=this.editor.model,i=n.document.selection.getSelectedElement();n.change(t=>{this.styles[e].isDefault?t.removeAttribute("imageStyle",i):t.setAttribute("imageStyle",e,i)})}}function Yg(t,e){for(const n of e)if(n.name===t)return n}var $g='',Gg='',Qg='',Kg='';const Jg={full:{name:"full",title:"Full size image",icon:$g,isDefault:!0},side:{name:"side",title:"Side image",icon:Kg,className:"image-style-side"},alignLeft:{name:"alignLeft",title:"Left aligned image",icon:Gg,className:"image-style-align-left"},alignCenter:{name:"alignCenter",title:"Centered image",icon:Qg,className:"image-style-align-center"},alignRight:{name:"alignRight",title:"Right aligned image",icon:Kg,className:"image-style-align-right"}},Zg={full:$g,left:Gg,right:Kg,center:Qg};function Xg(t=[]){return t.map(tm)}function tm(t){if("string"==typeof t){const e=t;Jg[e]?t=Object.assign({},Jg[e]):(console.warn(Object(Qn.a)("image-style-not-found: There is no such image style of given name."),{name:e}),t={name:e})}else if(Jg[t.name]){const e=Jg[t.name],n=Object.assign({},t);for(const i in e)t.hasOwnProperty(i)||(n[i]=e[i]);t=n}return"string"==typeof t.icon&&Zg[t.icon]&&(t.icon=Zg[t.icon]),t}class em extends Md{static get pluginName(){return"ImageStyleEditing"}init(){const t=this.editor,e=t.model.schema,n=t.data,i=t.editing;t.config.define("image.styles",["full","side"]);const o=Xg(t.config.get("image.styles"));e.extend("image",{allowAttributes:"imageStyle"});const r=function(t){return(e,n,i)=>{if(!i.consumable.consume(n.item,e.name))return;const o=Yg(n.attributeNewValue,t),r=Yg(n.attributeOldValue,t),s=i.mapper.toViewElement(n.item),a=i.writer;r&&a.removeClass(r.className,s),o&&a.addClass(o.className,s)}}(o);i.downcastDispatcher.on("attribute:imageStyle:image",r),n.downcastDispatcher.on("attribute:imageStyle:image",r),n.upcastDispatcher.on("element:figure",function(t){const e=t.filter(t=>!t.isDefault);return(t,n,i)=>{if(!n.modelRange)return;const o=n.viewItem,r=Jh(n.modelRange.getItems());if(i.schema.checkAttribute(r,"imageStyle"))for(const t of e)i.consumable.consume(o,{classes:t.className})&&i.writer.setAttribute("imageStyle",t.name,r)}}(o),{priority:"low"}),t.commands.add("imageStyle",new Wg(t,o))}}n(72);class nm extends Md{static get pluginName(){return"ImageStyleUI"}get localizedDefaultStylesTitles(){const t=this.editor.t;return{"Full size image":t("h"),"Side image":t("i"),"Left aligned image":t("j"),"Centered image":t("k"),"Right aligned image":t("l")}}init(){const t=function(t,e){for(const n of t)e[n.title]&&(n.title=e[n.title]);return t}(Xg(this.editor.config.get("image.styles")),this.localizedDefaultStylesTitles);for(const e of t)this._createButton(e)}_createButton(t){const e=this.editor,n=`imageStyle:${t.name}`;e.ui.componentFactory.add(n,n=>{const i=e.commands.get("imageStyle"),o=new ud(n);return o.set({label:t.title,icon:t.icon,tooltip:!0,isToggleable:!0}),o.bind("isEnabled").to(i,"isEnabled"),o.bind("isOn").to(i,"value",e=>e===t.name),this.listenTo(o,"execute",()=>e.execute("imageStyle",{value:t.name})),o})}}class im extends Md{static get requires(){return[tg]}static get pluginName(){return"WidgetToolbarRepository"}init(){const t=this.editor;if(t.plugins.has("BalloonToolbar")){const e=t.plugins.get("BalloonToolbar");this.listenTo(e,"show",e=>{(function(t){const e=t.getSelectedElement();return!(!e||!pu(e))})(t.editing.view.document.selection)&&e.stop()},{priority:"high"})}this._toolbarDefinitions=new Map,this._balloon=this.editor.plugins.get("ContextualBalloon"),this.listenTo(t.ui,"update",()=>{this._updateToolbarsVisibility()}),this.listenTo(t.ui.focusTracker,"change:isFocused",()=>{this._updateToolbarsVisibility()},{priority:"low"})}destroy(){super.destroy();for(const t of this._toolbarDefinitions.values())t.view.destroy()}register(t,{ariaLabel:e,items:n,getRelatedElement:i,balloonClassName:o="ck-toolbar-container"}){const r=this.editor,s=r.t,a=new xd(r.locale);if(a.ariaLabel=e||s("au"),this._toolbarDefinitions.has(t))throw new Qn.b("widget-toolbar-duplicated: Toolbar with the given id was already added.",this,{toolbarId:t});a.fillFromConfig(n,r.ui.componentFactory),this._toolbarDefinitions.set(t,{view:a,getRelatedElement:i,balloonClassName:o})}_updateToolbarsVisibility(){let t=0,e=null,n=null;for(const i of this._toolbarDefinitions.values()){const o=i.getRelatedElement(this.editor.editing.view.document.selection);if(this.editor.ui.focusTracker.isFocused)if(o){const r=o.getAncestors().length;r>t&&(t=r,e=o,n=i)}else this._isToolbarInBalloon(i)&&this._hideToolbar(i);else this._isToolbarVisible(i)&&this._hideToolbar(i)}n&&this._showToolbar(n,e)}_hideToolbar(t){this._balloon.remove(t.view),this.stopListening(this._balloon,"change:visibleView")}_showToolbar(t,e){this._isToolbarVisible(t)?om(this.editor,e):this._isToolbarInBalloon(t)||(this._balloon.add({view:t.view,position:rm(this.editor,e),balloonClassName:t.balloonClassName}),this.listenTo(this._balloon,"change:visibleView",()=>{for(const t of this._toolbarDefinitions.values())if(this._isToolbarVisible(t)){const e=t.getRelatedElement(this.editor.editing.view.document.selection);om(this.editor,e)}}))}_isToolbarVisible(t){return this._balloon.visibleView===t.view}_isToolbarInBalloon(t){return this._balloon.hasView(t.view)}}function om(t,e){const n=t.plugins.get("ContextualBalloon"),i=rm(t,e);n.updatePosition(i)}function rm(t,e){const n=t.editing.view,i=$f.defaultPositions;return{target:n.domConverter.mapViewToDom(e),positions:[i.northArrowSouth,i.northArrowSouthWest,i.northArrowSouthEast,i.southArrowNorth,i.southArrowNorthWest,i.southArrowNorthEast]}}class sm extends Rd{constructor(t){super(t),this._childCommands=[]}refresh(){}execute(...t){this._getFirstEnabledCommand().execute(t)}registerChildCommand(t){this._childCommands.push(t),t.on("change:isEnabled",()=>this._checkEnabled()),this._checkEnabled()}_checkEnabled(){this.isEnabled=!!this._getFirstEnabledCommand()}_getFirstEnabledCommand(){return this._childCommands.find(t=>t.isEnabled)}}class am extends Md{static get pluginName(){return"IndentEditing"}init(){const t=this.editor;t.commands.add("indent",new sm(t)),t.commands.add("outdent",new sm(t))}}var cm='\n',lm='\n';class dm extends Md{static get pluginName(){return"IndentUI"}init(){const t=this.editor,e=t.locale,n=t.t,i="ltr"==e.uiLanguageDirection?cm:lm,o="ltr"==e.uiLanguageDirection?lm:cm;this._defineButton("indent",n("p"),i),this._defineButton("outdent",n("q"),o)}_defineButton(t,e,n){const i=this.editor;i.ui.componentFactory.add(t,o=>{const r=i.commands.get(t),s=new ud(o);return s.set({label:e,icon:n,tooltip:!0}),s.bind("isOn","isEnabled").to(r,"value","isEnabled"),this.listenTo(s,"execute",()=>i.execute(t)),s})}}class hm extends is{constructor(t){super(t),this.domEventType="click"}onDomEvent(t){this.fire(t.type,t)}}n(74);class um extends Wl{constructor(t,e=[]){super(t);const n=t.t;this.focusTracker=new ml,this.keystrokes=new sl,this.urlInputView=this._createUrlInput(),this.saveButtonView=this._createButton(n("bc"),Uf,"ck-button-save"),this.saveButtonView.type="submit",this.cancelButtonView=this._createButton(n("bd"),Hf,"ck-button-cancel","cancel"),this._manualDecoratorSwitches=this._createManualDecoratorSwitches(e),this.children=this._createFormChildren(e),this._focusables=new Al,this._focusCycler=new td({focusables:this._focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}});const i=["ck","ck-link-form"];e.length&&i.push("ck-link-form_layout-vertical"),this.setTemplate({tag:"form",attributes:{class:i,tabindex:"-1"},children:this.children})}getDecoratorSwitchesState(){return Array.from(this._manualDecoratorSwitches).reduce((t,e)=>(t[e.name]=e.isOn,t),{})}render(){super.render(),Ff({view:this}),[this.urlInputView,...this._manualDecoratorSwitches,this.saveButtonView,this.cancelButtonView].forEach(t=>{this._focusables.add(t),this.focusTracker.add(t.element)}),this.keystrokes.listenTo(this.element)}focus(){this._focusCycler.focusFirst()}_createUrlInput(){const t=this.locale.t,e=new zf(this.locale,Bf);return e.label=t("bh"),e.inputView.placeholder="https://example.com",e}_createButton(t,e,n,i){const o=new ud(this.locale);return o.set({label:t,icon:e,tooltip:!0}),o.extendTemplate({attributes:{class:n}}),i&&o.delegate("execute").to(this,i),o}_createManualDecoratorSwitches(t){const e=this.createCollection();for(const n of t){const t=new wd(this.locale);t.set({name:n.id,label:n.label,withText:!0}),t.bind("isOn").to(n,"value"),t.on("execute",()=>{n.set("value",!t.isOn)}),e.add(t)}return e}_createFormChildren(t){const e=this.createCollection();if(e.add(this.urlInputView),t.length){const t=new Wl;t.setTemplate({tag:"ul",children:this._manualDecoratorSwitches.map(t=>({tag:"li",children:[t],attributes:{class:["ck","ck-list__item"]}})),attributes:{class:["ck","ck-reset","ck-list"]}}),e.add(t)}return e.add(this.saveButtonView),e.add(this.cancelButtonView),e}}var fm='',gm='';n(76);class mm extends Wl{constructor(t){super(t);const e=t.t;this.focusTracker=new ml,this.keystrokes=new sl,this.previewButtonView=this._createPreviewButton(),this.unlinkButtonView=this._createButton(e("ay"),fm,"unlink"),this.editButtonView=this._createButton(e("az"),gm,"edit"),this.set("href"),this._focusables=new Al,this._focusCycler=new td({focusables:this._focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}}),this.setTemplate({tag:"div",attributes:{class:["ck","ck-link-actions"],tabindex:"-1"},children:[this.previewButtonView,this.editButtonView,this.unlinkButtonView]})}render(){super.render(),[this.previewButtonView,this.editButtonView,this.unlinkButtonView].forEach(t=>{this._focusables.add(t),this.focusTracker.add(t.element)}),this.keystrokes.listenTo(this.element)}focus(){this._focusCycler.focusFirst()}_createButton(t,e,n){const i=new ud(this.locale);return i.set({label:t,icon:e,tooltip:!0}),i.delegate("execute").to(this,n),i}_createPreviewButton(){const t=new ud(this.locale),e=this.bindTemplate,n=this.t;return t.set({withText:!0,tooltip:n("ba")}),t.extendTemplate({attributes:{class:["ck","ck-link-actions__preview"],href:e.to("href",t=>t&&af(t)),target:"_blank",rel:"noopener noreferrer"}}),t.bind("label").to(this,"href",t=>t||n("bb")),t.bind("isEnabled").to(this,"href",t=>!!t),t.template.tag="a",t.template.eventListeners={},t}}var pm='';const bm="Ctrl+K";class wm extends Md{static get requires(){return[tg]}static get pluginName(){return"LinkUI"}init(){const t=this.editor;t.editing.view.addObserver(hm),this.actionsView=this._createActionsView(),this.formView=this._createFormView(),this._balloon=t.plugins.get(tg),this._createToolbarLinkButton(),this._enableUserBalloonInteractions()}destroy(){super.destroy(),this.formView.destroy()}_createActionsView(){const t=this.editor,e=new mm(t.locale),n=t.commands.get("link"),i=t.commands.get("unlink");return e.bind("href").to(n,"value"),e.editButtonView.bind("isEnabled").to(n),e.unlinkButtonView.bind("isEnabled").to(i),this.listenTo(e,"edit",()=>{this._addFormView()}),this.listenTo(e,"unlink",()=>{t.execute("unlink"),this._hideUI()}),e.keystrokes.set("Esc",(t,e)=>{this._hideUI(),e()}),e.keystrokes.set(bm,(t,e)=>{this._addFormView(),e()}),e}_createFormView(){const t=this.editor,e=t.commands.get("link"),n=new um(t.locale,e.manualDecorators);return n.urlInputView.bind("value").to(e,"value"),n.urlInputView.bind("isReadOnly").to(e,"isEnabled",t=>!t),n.saveButtonView.bind("isEnabled").to(e),this.listenTo(n,"submit",()=>{t.execute("link",n.urlInputView.inputView.element.value,n.getDecoratorSwitchesState()),this._closeFormView()}),this.listenTo(n,"cancel",()=>{this._closeFormView()}),n.keystrokes.set("Esc",(t,e)=>{this._closeFormView(),e()}),n}_createToolbarLinkButton(){const t=this.editor,e=t.commands.get("link"),n=t.t;t.keystrokes.set(bm,(t,n)=>{n(),e.isEnabled&&this._showUI(!0)}),t.ui.componentFactory.add("link",t=>{const i=new ud(t);return i.isEnabled=!0,i.label=n("as"),i.icon=pm,i.keystroke=bm,i.tooltip=!0,i.isToggleable=!0,i.bind("isEnabled").to(e,"isEnabled"),i.bind("isOn").to(e,"value",t=>!!t),this.listenTo(i,"execute",()=>this._showUI(!0)),i})}_enableUserBalloonInteractions(){const t=this.editor.editing.view.document;this.listenTo(t,"click",()=>{this._getSelectedLinkElement()&&this._showUI()}),this.editor.keystrokes.set("Tab",(t,e)=>{this._areActionsVisible&&!this.actionsView.focusTracker.isFocused&&(this.actionsView.focus(),e())},{priority:"high"}),this.editor.keystrokes.set("Esc",(t,e)=>{this._isUIVisible&&(this._hideUI(),e())}),kd({emitter:this.formView,activator:()=>this._isUIInPanel,contextElements:[this._balloon.view.element],callback:()=>this._hideUI()})}_addActionsView(){this._areActionsInPanel||this._balloon.add({view:this.actionsView,position:this._getBalloonPositionData()})}_addFormView(){if(this._isFormInPanel)return;const t=this.editor.commands.get("link");this._balloon.add({view:this.formView,position:this._getBalloonPositionData()}),this._balloon.visibleView===this.formView&&this.formView.urlInputView.select(),this.formView.urlInputView.inputView.element.value=t.value||""}_closeFormView(){const t=this.editor.commands.get("link");t.restoreManualDecoratorStates(),void 0!==t.value?this._removeFormView():this._hideUI()}_removeFormView(){this._isFormInPanel&&(this.formView.saveButtonView.focus(),this._balloon.remove(this.formView),this.editor.editing.view.focus())}_showUI(t=!1){this.editor.commands.get("link").isEnabled&&(this._getSelectedLinkElement()?(this._areActionsVisible?this._addFormView():this._addActionsView(),t&&this._balloon.showStack("main")):(this._addActionsView(),t&&this._balloon.showStack("main"),this._addFormView()),this._startUpdatingUI())}_hideUI(){if(!this._isUIInPanel)return;const t=this.editor;this.stopListening(t.ui,"update"),this.stopListening(this._balloon,"change:visibleView"),t.editing.view.focus(),this._removeFormView(),this._balloon.remove(this.actionsView)}_startUpdatingUI(){const t=this.editor,e=t.editing.view.document;let n=this._getSelectedLinkElement(),i=r();const o=()=>{const t=this._getSelectedLinkElement(),e=r();n&&!t||!n&&e!==i?this._hideUI():this._isUIVisible&&this._balloon.updatePosition(this._getBalloonPositionData()),n=t,i=e};function r(){return e.selection.focus.getAncestors().reverse().find(t=>t.is("element"))}this.listenTo(t.ui,"update",o),this.listenTo(this._balloon,"change:visibleView",o)}get _isFormInPanel(){return this._balloon.hasView(this.formView)}get _areActionsInPanel(){return this._balloon.hasView(this.actionsView)}get _areActionsVisible(){return this._balloon.visibleView===this.actionsView}get _isUIInPanel(){return this._isFormInPanel||this._areActionsInPanel}get _isUIVisible(){return this._balloon.visibleView==this.formView||this._areActionsVisible}_getBalloonPositionData(){const t=this.editor.editing.view,e=t.document,n=this._getSelectedLinkElement();return{target:n?t.domConverter.mapViewToDom(n):t.domConverter.viewRangeToDom(e.selection.getFirstRange())}}_getSelectedLinkElement(){const t=this.editor.editing.view,e=t.document.selection;if(e.isCollapsed)return km(e.getFirstPosition());{const n=e.getFirstRange().getTrimmed(),i=km(n.start),o=km(n.end);return i&&i==o&&t.createRangeIn(i).getTrimmed().isEqual(n)?i:null}}}function km(t){return t.getAncestors().find(t=>(function(t){return t.is("attributeElement")&&!!t.getCustomProperty("link")})(t))}class _m extends Rd{constructor(t,e){super(t),this.type=e}refresh(){this.value=this._getValue(),this.isEnabled=this._checkEnabled()}execute(){const t=this.editor.model,e=t.document,n=Array.from(e.selection.getSelectedBlocks()).filter(e=>ym(e,t.schema)),i=!0===this.value;t.change(t=>{if(i){let e=n[n.length-1].nextSibling,i=Number.POSITIVE_INFINITY,o=[];for(;e&&"listItem"==e.name&&0!==e.getAttribute("listIndent");){const t=e.getAttribute("listIndent");t=n;)r>o.getAttribute("listIndent")&&(r=o.getAttribute("listIndent")),o.getAttribute("listIndent")==r&&t[e?"unshift":"push"](o),o=o[e?"previousSibling":"nextSibling"]}}function ym(t,e){return e.checkChild(t.parent,"listItem")&&!e.isObject(t)}class xm extends Rd{constructor(t,e){super(t),this._indentBy="forward"==e?1:-1}refresh(){this.isEnabled=this._checkEnabled()}execute(){const t=this.editor.model,e=t.document;let n=Array.from(e.selection.getSelectedBlocks());t.change(t=>{const e=n[n.length-1];let i=e.nextSibling;for(;i&&"listItem"==i.name&&i.getAttribute("listIndent")>e.getAttribute("listIndent");)n.push(i),i=i.nextSibling;this._indentBy<0&&(n=n.reverse());for(const e of n){const n=e.getAttribute("listIndent")+this._indentBy;n<0?t.rename(e,"paragraph"):t.setAttribute("listIndent",n,e)}})}_checkEnabled(){const t=Jh(this.editor.model.document.selection.getSelectedBlocks());if(!t||!t.is("listItem"))return!1;if(this._indentBy>0){const e=t.getAttribute("listIndent"),n=t.getAttribute("listType");let i=t.previousSibling;for(;i&&i.is("listItem")&&i.getAttribute("listIndent")>=e;){if(i.getAttribute("listIndent")==e)return i.getAttribute("listType")==n;i=i.previousSibling}return!1}return!0}}function Am(t,e){const n=e.mapper,i=e.writer,o="numbered"==t.getAttribute("listType")?"ol":"ul",r=function(t){const e=t.createContainerElement("li");return e.getFillerOffset=Em,e}(i),s=i.createContainerElement(o,null);return i.insert(i.createPositionAt(s,0),r),n.bindElements(t,r),r}function Tm(t,e,n,i){const o=e.parent,r=n.mapper,s=n.writer;let a=r.toViewPosition(i.createPositionBefore(t));const c=Sm(t.previousSibling,{sameIndent:!0,smallerIndent:!0,listIndent:t.getAttribute("listIndent")}),l=t.previousSibling;if(c&&c.getAttribute("listIndent")==t.getAttribute("listIndent")){const t=r.toViewElement(c);a=s.breakContainer(s.createPositionAfter(t))}else a=l&&"listItem"==l.name?r.toViewPosition(i.createPositionAt(l,"end")):r.toViewPosition(i.createPositionBefore(t));if(a=Pm(a),s.insert(a,o),l&&"listItem"==l.name){const t=r.toViewElement(l),n=s.createRange(s.createPositionAt(t,0),a).getWalker({ignoreElementEnd:!0});for(const t of n)if(t.item.is("li")){const i=s.breakContainer(s.createPositionBefore(t.item)),o=t.item.parent,r=s.createPositionAt(e,"end");Cm(s,r.nodeBefore,r.nodeAfter),s.move(s.createRangeOn(o),r),n.position=i}}else{const n=o.nextSibling;if(n&&(n.is("ul")||n.is("ol"))){let i=null;for(const e of n.getChildren()){const n=r.toModelElement(e);if(!(n&&n.getAttribute("listIndent")>t.getAttribute("listIndent")))break;i=e}i&&(s.breakContainer(s.createPositionAfter(i)),s.move(s.createRangeOn(i.parent),s.createPositionAt(e,"end")))}}Cm(s,o,o.nextSibling),Cm(s,o.previousSibling,o)}function Cm(t,e,n){return!e||!n||"ul"!=e.name&&"ol"!=e.name?null:e.name!=n.name||e.getAttribute("class")!==n.getAttribute("class")?null:t.mergeContainers(t.createPositionAfter(e))}function Pm(t){return t.getLastMatchingPosition(t=>t.item.is("uiElement"))}function Sm(t,e){const n=!!e.sameIndent,i=!!e.smallerIndent,o=e.listIndent;let r=t;for(;r&&"listItem"==r.name;){const t=r.getAttribute("listIndent");if(n&&o==t||i&&o>t)return r;r=r.previousSibling}return null}function Mm(t,e,n,i){t.ui.componentFactory.add(e,o=>{const r=t.commands.get(e),s=new ud(o);return s.set({label:n,icon:i,tooltip:!0,isToggleable:!0}),s.bind("isOn","isEnabled").to(r,"value","isEnabled"),s.on("execute",()=>t.execute(e)),s})}function Em(){const t=!this.isEmpty&&("ul"==this.getChild(0).name||"ol"==this.getChild(0).name);return this.isEmpty||t?0:Ai.call(this)}function Im(t){return(e,n,i)=>{const o=i.consumable;if(!o.test(n.item,"insert")||!o.test(n.item,"attribute:listType")||!o.test(n.item,"attribute:listIndent"))return;o.consume(n.item,"insert"),o.consume(n.item,"attribute:listType"),o.consume(n.item,"attribute:listIndent");const r=n.item;Tm(r,Am(r,i),i,t)}}function Nm(t,e,n){if(!n.consumable.consume(e.item,"attribute:listType"))return;const i=n.mapper.toViewElement(e.item),o=n.writer;o.breakContainer(o.createPositionBefore(i)),o.breakContainer(o.createPositionAfter(i));const r=i.parent,s="numbered"==e.attributeNewValue?"ol":"ul";o.rename(s,r)}function Om(t,e,n){const i=n.mapper.toViewElement(e.item).parent,o=n.writer;Cm(o,i,i.nextSibling),Cm(o,i.previousSibling,i);for(const t of e.item.getChildren())n.consumable.consume(t,"insert")}function Rm(t,e,n){if("listItem"!=e.item.name){let t=n.mapper.toViewPosition(e.range.start);const i=n.writer,o=[];for(;("ul"==t.parent.name||"ol"==t.parent.name)&&"li"==(t=i.breakContainer(t)).parent.name;){const e=t,n=i.createPositionAt(t.parent,"end");if(!e.isEqual(n)){const t=i.remove(i.createRange(e,n));o.push(t)}t=i.createPositionAfter(t.parent)}if(o.length>0){for(let e=0;e0){const e=Cm(i,n,n.nextSibling);e&&e.parent==n&&t.offset--}}Cm(i,t.nodeBefore,t.nodeAfter)}}}function Dm(t,e,n){const i=n.mapper.toViewPosition(e.position),o=i.nodeBefore,r=i.nodeAfter;Cm(n.writer,o,r)}function Lm(t,e,n){if(n.consumable.consume(e.viewItem,{name:!0})){const t=n.writer,i=t.createElement("listItem"),o=function(t){let e=0,n=t.parent;for(;n;){if(n.is("li"))e++;else{const t=n.previousSibling;t&&t.is("li")&&e++}n=n.parent}return e}(e.viewItem);t.setAttribute("listIndent",o,i);const r=e.viewItem.parent&&"ol"==e.viewItem.parent.name?"numbered":"bulleted";t.setAttribute("listType",r,i);const s=n.splitToAllowedParent(i,e.modelCursor);if(!s)return;t.insert(i,s.position);const a=function(t,e,n){const{writer:i,schema:o}=n;let r=i.createPositionAfter(t);for(const s of e)if("ul"==s.name||"ol"==s.name)r=n.convertItem(s,r).modelCursor;else{const e=n.convertItem(s,i.createPositionAt(t,"end")),a=e.modelRange.start.nodeAfter;a&&a.is("element")&&!o.checkChild(t,a.name)&&(t=e.modelCursor.parent.is("listItem")?e.modelCursor.parent:Fm(e.modelCursor),r=i.createPositionAfter(t))}return r}(i,e.viewItem.getChildren(),n);e.modelRange=t.createRange(e.modelCursor,a),s.cursorParent?e.modelCursor=t.createPositionAt(s.cursorParent,0):e.modelCursor=e.modelRange.end}}function jm(t,e,n){if(n.consumable.test(e.viewItem,{name:!0})){const t=Array.from(e.viewItem.getChildren());for(const e of t){!(e.is("li")||Hm(e))&&e._remove()}}}function Vm(t,e,n){if(n.consumable.test(e.viewItem,{name:!0})){if(0===e.viewItem.childCount)return;const t=[...e.viewItem.getChildren()];let n=!1,i=!0;for(const e of t)n&&!Hm(e)&&e._remove(),e.is("text")?(i&&(e._data=e.data.replace(/^\s+/,"")),e.nextSibling&&!Hm(e.nextSibling)||(e._data=e.data.replace(/\s+$/,""))):Hm(e)&&(n=!0),i=!1}}function zm(t){return(e,n)=>{if(n.isPhantom)return;const i=n.modelPosition.nodeBefore;if(i&&i.is("listItem")){const e=n.mapper.toViewElement(i),o=e.getAncestors().find(Hm),r=t.createPositionAt(e,0).getWalker();for(const t of r){if("elementStart"==t.type&&t.item.is("li")){n.viewPosition=t.previousPosition;break}if("elementEnd"==t.type&&t.item==o){n.viewPosition=t.nextPosition;break}}}}}function Bm(t,[e,n]){let i,o=e.is("documentFragment")?e.getChild(0):e;if(i=n?this.createSelection(n):this.document.selection,o&&o.is("listItem")){const t=i.getFirstPosition();let e=null;if(t.parent.is("listItem")?e=t.parent:t.nodeBefore&&t.nodeBefore.is("listItem")&&(e=t.nodeBefore),e){const t=e.getAttribute("listIndent");if(t>0)for(;o&&o.is("listItem");)o._setAttribute("listIndent",o.getAttribute("listIndent")+t),o=o.nextSibling}}}function Fm(t){const e=new $s({startPosition:t});let n;do{n=e.next()}while(!n.value.item.is("listItem"));return n.value.item}function Um(t,e,n,i,o,r){const s=Sm(e.nodeBefore,{sameIndent:!0,smallerIndent:!0,listIndent:t,foo:"b"}),a=o.mapper,c=o.writer,l=s?s.getAttribute("listIndent"):null;let d;if(s)if(l==t){const t=a.toViewElement(s).parent;d=c.createPositionAfter(t)}else{const t=r.createPositionAt(s,"end");d=a.toViewPosition(t)}else d=n;d=Pm(d);for(const t of[...i.getChildren()])Hm(t)&&(d=c.move(c.createRangeOn(t),d).end,Cm(c,t,t.nextSibling),Cm(c,t.previousSibling,t))}function Hm(t){return t.is("ol")||t.is("ul")}class qm extends Md{static get pluginName(){return"ListEditing"}static get requires(){return[Mg]}init(){const t=this.editor;t.model.schema.register("listItem",{inheritAllFrom:"$block",allowAttributes:["listType","listIndent"]});const e=t.data,n=t.editing;var i;t.model.document.registerPostFixer(e=>(function(t,e){const n=t.document.differ.getChanges(),i=new Map;let o=!1;for(const i of n)if("insert"==i.type&&"listItem"==i.name)r(i.position);else if("insert"==i.type&&"listItem"!=i.name){if("$text"!=i.name){const n=i.position.nodeAfter;n.hasAttribute("listIndent")&&(e.removeAttribute("listIndent",n),o=!0),n.hasAttribute("listType")&&(e.removeAttribute("listType",n),o=!0);for(const e of Array.from(t.createRangeIn(n)).filter(t=>t.item.is("listItem")))r(e.previousPosition)}r(i.position.getShiftedBy(i.length))}else"remove"==i.type&&"listItem"==i.name?r(i.position):"attribute"==i.type&&"listIndent"==i.attributeKey?r(i.range.start):"attribute"==i.type&&"listType"==i.attributeKey&&r(i.range.start);for(const t of i.values())s(t),a(t);return o;function r(t){const e=t.nodeBefore;if(e&&e.is("listItem")){let n=e;if(i.has(n))return;for(;n.previousSibling&&n.previousSibling.is("listItem");)if(n=n.previousSibling,i.has(n))return;i.set(t.nodeBefore,n)}else{const e=t.nodeAfter;e&&e.is("listItem")&&i.set(e,e)}}function s(t){let n=0,i=null;for(;t&&t.is("listItem");){const r=t.getAttribute("listIndent");if(r>n){let s;null===i?(i=r-n,s=n):(i>r&&(i=r),s=r-i),e.setAttribute("listIndent",s,t),o=!0}else i=null,n=t.getAttribute("listIndent")+1;t=t.nextSibling}}function a(t){let n=[],i=null;for(;t&&t.is("listItem");){const r=t.getAttribute("listIndent");if(i&&i.getAttribute("listIndent")>r&&(n=n.slice(0,r+1)),0!=r)if(n[r]){const i=n[r];t.getAttribute("listType")!=i&&(e.setAttribute("listType",i,t),o=!0)}else n[r]=t.getAttribute("listType");i=t,t=t.nextSibling}}})(t.model,e)),n.mapper.registerViewToModelLength("li",Wm),e.mapper.registerViewToModelLength("li",Wm),n.mapper.on("modelToViewPosition",zm(n.view)),n.mapper.on("viewToModelPosition",(i=t.model,(t,e)=>{const n=e.viewPosition,o=n.parent,r=e.mapper;if("ul"==o.name||"ol"==o.name){if(n.isAtEnd){const t=r.toModelElement(n.nodeBefore),o=r.getModelLength(n.nodeBefore);e.modelPosition=i.createPositionBefore(t).getShiftedBy(o)}else{const t=r.toModelElement(n.nodeAfter);e.modelPosition=i.createPositionBefore(t)}t.stop()}else if("li"==o.name&&n.nodeBefore&&("ul"==n.nodeBefore.name||"ol"==n.nodeBefore.name)){const s=r.toModelElement(o);let a=1,c=n.nodeBefore;for(;c&&Hm(c);)a+=r.getModelLength(c),c=c.previousSibling;e.modelPosition=i.createPositionBefore(s).getShiftedBy(a),t.stop()}})),e.mapper.on("modelToViewPosition",zm(n.view)),t.conversion.for("editingDowncast").add(e=>{e.on("insert",Rm,{priority:"high"}),e.on("insert:listItem",Im(t.model)),e.on("attribute:listType:listItem",Nm,{priority:"high"}),e.on("attribute:listType:listItem",Om,{priority:"low"}),e.on("attribute:listIndent:listItem",function(t){return(e,n,i)=>{if(!i.consumable.consume(n.item,"attribute:listIndent"))return;const o=i.mapper.toViewElement(n.item),r=i.writer;r.breakContainer(r.createPositionBefore(o)),r.breakContainer(r.createPositionAfter(o));const s=o.parent,a=s.previousSibling,c=r.createRangeOn(s);r.remove(c),a&&a.nextSibling&&Cm(r,a,a.nextSibling),Um(n.attributeOldValue+1,n.range.start,c.start,o,i,t),Tm(n.item,o,i,t);for(const t of n.item.getChildren())i.consumable.consume(t,"insert")}}(t.model)),e.on("remove:listItem",function(t){return(e,n,i)=>{const o=i.mapper.toViewPosition(n.position).getLastMatchingPosition(t=>!t.item.is("li")).nodeAfter,r=i.writer;r.breakContainer(r.createPositionBefore(o)),r.breakContainer(r.createPositionAfter(o));const s=o.parent,a=s.previousSibling,c=r.createRangeOn(s),l=r.remove(c);a&&a.nextSibling&&Cm(r,a,a.nextSibling),Um(i.mapper.toModelElement(o).getAttribute("listIndent")+1,n.position,c.start,o,i,t);for(const t of r.createRangeIn(l).getItems())i.mapper.unbindViewElement(t);e.stop()}}(t.model)),e.on("remove",Dm,{priority:"low"})}),t.conversion.for("dataDowncast").add(e=>{e.on("insert",Rm,{priority:"high"}),e.on("insert:listItem",Im(t.model))}),t.conversion.for("upcast").add(t=>{t.on("element:ul",jm,{priority:"high"}),t.on("element:ol",jm,{priority:"high"}),t.on("element:li",Vm,{priority:"high"}),t.on("element:li",Lm)}),t.model.on("insertContent",Bm,{priority:"high"}),t.commands.add("numberedList",new _m(t,"numbered")),t.commands.add("bulletedList",new _m(t,"bulleted")),t.commands.add("indentList",new xm(t,"forward")),t.commands.add("outdentList",new xm(t,"backward"));const o=n.view.document;this.listenTo(o,"enter",(t,e)=>{const n=this.editor.model.document,i=n.selection.getLastPosition().parent;n.selection.isCollapsed&&"listItem"==i.name&&i.isEmpty&&(this.editor.execute("outdentList"),e.preventDefault(),t.stop())}),this.listenTo(o,"delete",(t,e)=>{if("backward"!==e.direction)return;const n=this.editor.model.document.selection;if(!n.isCollapsed)return;const i=n.getFirstPosition();if(!i.isAtStart)return;const o=i.parent;"listItem"===o.name&&(o.previousSibling&&"listItem"===o.previousSibling.name||(this.editor.execute("outdentList"),e.preventDefault(),t.stop()))},{priority:"high"});const r=t=>(e,n)=>{this.editor.commands.get(t).isEnabled&&(this.editor.execute(t),n())};t.keystrokes.set("Tab",r("indentList")),t.keystrokes.set("Shift+Tab",r("outdentList"))}afterInit(){const t=this.editor.commands,e=t.get("indent"),n=t.get("outdent");e&&e.registerChildCommand(t.get("indentList")),n&&n.registerChildCommand(t.get("outdentList"))}}function Wm(t){let e=1;for(const n of t.getChildren())if("ul"==n.name||"ol"==n.name)for(const t of n.getChildren())e+=Wm(t);return e}var Ym='',$m='';class Gm extends Md{init(){const t=this.editor.t;Mm(this.editor,"numberedList",t("r"),Ym),Mm(this.editor,"bulletedList",t("s"),$m)}}function Qm(t,e){return t=>{t.on("attribute:url:media",n)};function n(n,i,o){if(!o.consumable.consume(i.item,n.name))return;const r=i.attributeNewValue,s=o.writer,a=o.mapper.toViewElement(i.item);s.remove(s.createRangeIn(a));const c=t.getMediaViewElement(s,r,e);s.insert(s.createPositionAt(a,0),c)}}function Km(t,e,n,i){const o=t.createContainerElement("figure",{class:"media"});return o.getFillerOffset=Xm,t.insert(t.createPositionAt(o,0),e.getMediaViewElement(t,n,i)),o}function Jm(t){const e=t.getSelectedElement();return e&&e.is("media")?e:null}function Zm(t,e,n){t.change(i=>{const o=i.createElement("media",{url:e});t.insertContent(o,n),i.setSelection(o,"on")})}function Xm(){return null}class tp extends Rd{refresh(){const t=this.editor.model,e=t.document.selection,n=t.schema,i=e.getFirstPosition(),o=Jm(e);let r=i.parent;r!=r.root&&(r=r.parent),this.value=o?o.getAttribute("url"):null,this.isEnabled=n.checkChild(r,"media")}execute(t){const e=this.editor.model,n=e.document.selection,i=Jm(n);if(i)e.change(e=>{e.setAttribute("url",t,i)});else{const i=_u(n,e);Zm(e,t,i)}}}var ep='';const np="0 0 64 42";class ip{constructor(t,e){const n=e.providers,i=e.extraProviders||[],o=new Set(e.removeProviders),r=n.concat(i).filter(t=>{const e=t.name;return e?!o.has(e):(console.warn(Object(Qn.a)("media-embed-no-provider-name: The configured media provider has no name and cannot be used."),{provider:t}),!1)});this.locale=t,this.providerDefinitions=r}hasMedia(t){return!!this._getMedia(t)}getMediaViewElement(t,e,n){return this._getMedia(e).getViewElement(t,n)}_getMedia(t){if(!t)return new op(this.locale);t=t.trim();for(const e of this.providerDefinitions){const n=e.html;let i=e.url;Array.isArray(i)||(i=[i]);for(const e of i){const i=this._getUrlMatches(t,e);if(i)return new op(this.locale,t,i,n)}}return null}_getUrlMatches(t,e){let n=t.match(e);if(n)return n;let i=t.replace(/^https?:\/\//,"");return(n=i.match(e))?n:(n=(i=i.replace(/^www\./,"")).match(e))||null}}class op{constructor(t,e,n,i){this.url=this._getValidUrl(e),this._t=t.t,this._match=n,this._previewRenderer=i}getViewElement(t,e){const n={};if(e.renderForEditingView||e.renderMediaPreview&&this.url&&this._previewRenderer){this.url&&(n["data-oembed-url"]=this.url),e.renderForEditingView&&(n.class="ck-media__wrapper");const i=this._getPreviewHtml(e);return t.createUIElement("div",n,(function(t){const e=this.toDomElement(t);return e.innerHTML=i,e}))}return this.url&&(n.url=this.url),t.createEmptyElement("oembed",n)}_getPreviewHtml(t){return this._previewRenderer?this._previewRenderer(this._match):this.url&&t.renderForEditingView?this._getPlaceholderHtml():""}_getPlaceholderHtml(){const t=new hd,e=new dd;return t.text=this._t("Open media in new tab"),e.content=ep,e.viewBox=np,new Cl({tag:"div",attributes:{class:"ck ck-reset_all ck-media__placeholder"},children:[{tag:"div",attributes:{class:"ck-media__placeholder__icon"},children:[e]},{tag:"a",attributes:{class:"ck-media__placeholder__url",target:"_blank",rel:"noopener noreferrer",href:this.url},children:[{tag:"span",attributes:{class:"ck-media__placeholder__url__text"},children:[this.url]},t]}]}).render().outerHTML}_getValidUrl(t){return t?t.match(/^https?/)?t:"https://"+t:null}}n(78);class rp extends Md{static get pluginName(){return"MediaEmbedEditing"}constructor(t){super(t),t.config.define("mediaEmbed",{providers:[{name:"dailymotion",url:/^dailymotion\.com\/video\/(\w+)/,html:t=>{return'
'+`
'}},{name:"spotify",url:[/^open\.spotify\.com\/(artist\/\w+)/,/^open\.spotify\.com\/(album\/\w+)/,/^open\.spotify\.com\/(track\/\w+)/],html:t=>{return'
'+`
'}},{name:"youtube",url:[/^(?:m\.)?youtube\.com\/watch\?v=([\w-]+)/,/^(?:m\.)?youtube\.com\/v\/([\w-]+)/,/^youtube\.com\/embed\/([\w-]+)/,/^youtu\.be\/([\w-]+)/],html:t=>{return'
'+`
'}},{name:"vimeo",url:[/^vimeo\.com\/(\d+)/,/^vimeo\.com\/[^/]+\/[^/]+\/video\/(\d+)/,/^vimeo\.com\/album\/[^/]+\/video\/(\d+)/,/^vimeo\.com\/channels\/[^/]+\/(\d+)/,/^vimeo\.com\/groups\/[^/]+\/videos\/(\d+)/,/^vimeo\.com\/ondemand\/[^/]+\/(\d+)/,/^player\.vimeo\.com\/video\/(\d+)/],html:t=>{return'
'+`
'}},{name:"instagram",url:/^instagram\.com\/p\/(\w+)/},{name:"twitter",url:/^twitter\.com/},{name:"googleMaps",url:/^google\.com\/maps/},{name:"flickr",url:/^flickr\.com/},{name:"facebook",url:/^facebook\.com/}]}),this.registry=new ip(t.locale,t.config.get("mediaEmbed"))}init(){const t=this.editor,e=t.model.schema,n=t.t,i=t.conversion,o=t.config.get("mediaEmbed.previewsInData"),r=this.registry;t.commands.add("mediaEmbed",new tp(t)),e.register("media",{isObject:!0,isBlock:!0,allowWhere:"$block",allowAttributes:["url"]}),i.for("dataDowncast").elementToElement({model:"media",view:(t,e)=>{const n=t.getAttribute("url");return Km(e,r,n,{renderMediaPreview:n&&o})}}),i.for("dataDowncast").add(Qm(r,{renderMediaPreview:o})),i.for("editingDowncast").elementToElement({model:"media",view:(t,e)=>{const i=t.getAttribute("url");return function(t,e,n){return e.setCustomProperty("media",!0,t),bu(t,e,{label:n})}(Km(e,r,i,{renderForEditingView:!0}),e,n("ao"))}}),i.for("editingDowncast").add(Qm(r,{renderForEditingView:!0})),i.for("upcast").elementToElement({view:{name:"oembed",attributes:{url:!0}},model:(t,e)=>{const n=t.getAttribute("url");if(r.hasMedia(n))return e.createElement("media",{url:n})}}).elementToElement({view:{name:"div",attributes:{"data-oembed-url":!0}},model:(t,e)=>{const n=t.getAttribute("data-oembed-url");if(r.hasMedia(n))return e.createElement("media",{url:n})}})}}const sp=/^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w.-]+)+[\w\-._~:/?#[\]@!$&'()*+,;=]+$/;class ap extends Md{static get requires(){return[Od,Th]}static get pluginName(){return"AutoMediaEmbed"}constructor(t){super(t),this._timeoutId=null,this._positionToInsert=null}init(){const t=this.editor,e=t.model.document;this.listenTo(t.plugins.get(Od),"inputTransformation",()=>{const t=e.selection.getFirstRange(),n=Uc.fromPosition(t.start);n.stickiness="toPrevious";const i=Uc.fromPosition(t.end);i.stickiness="toNext",e.once("change:data",()=>{this._embedMediaBetweenPositions(n,i),n.detach(),i.detach()},{priority:"high"})}),t.commands.get("undo").on("execute",()=>{this._timeoutId&&(ir.window.clearTimeout(this._timeoutId),this._positionToInsert.detach(),this._timeoutId=null,this._positionToInsert=null)},{priority:"high"})}_embedMediaBetweenPositions(t,e){const n=this.editor,i=n.plugins.get(rp).registry,o=new ca(t,e),r=o.getWalker({ignoreElementEnd:!0});let s="";for(const t of r)t.item.is("textProxy")&&(s+=t.item.data);if(!(s=s.trim()).match(sp))return;if(!i.hasMedia(s))return;n.commands.get("mediaEmbed").isEnabled&&(this._positionToInsert=Uc.fromPosition(t),this._timeoutId=ir.window.setTimeout(()=>{n.model.change(t=>{let e;this._timeoutId=null,t.remove(o),"$graveyard"!==this._positionToInsert.root.rootName&&(e=this._positionToInsert),Zm(n.model,s,e),this._positionToInsert.detach(),this._positionToInsert=null})},100))}}n(80);class cp extends Wl{constructor(t,e){super(e);const n=e.t;this.focusTracker=new ml,this.keystrokes=new sl,this.urlInputView=this._createUrlInput(),this.saveButtonView=this._createButton(n("bc"),Uf,"ck-button-save"),this.saveButtonView.type="submit",this.cancelButtonView=this._createButton(n("bd"),Hf,"ck-button-cancel","cancel"),this._focusables=new Al,this._focusCycler=new td({focusables:this._focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:"shift + tab",focusNext:"tab"}}),this._validators=t,this.setTemplate({tag:"form",attributes:{class:["ck","ck-media-form"],tabindex:"-1"},children:[this.urlInputView,this.saveButtonView,this.cancelButtonView]})}render(){super.render(),Ff({view:this}),[this.urlInputView,this.saveButtonView,this.cancelButtonView].forEach(t=>{this._focusables.add(t),this.focusTracker.add(t.element)}),this.keystrokes.listenTo(this.element);const t=t=>t.stopPropagation();this.keystrokes.set("arrowright",t),this.keystrokes.set("arrowleft",t),this.keystrokes.set("arrowup",t),this.keystrokes.set("arrowdown",t),this.listenTo(this.urlInputView.element,"selectstart",(t,e)=>{e.stopPropagation()},{priority:"high"})}focus(){this._focusCycler.focusFirst()}get url(){return this.urlInputView.inputView.element.value.trim()}set url(t){this.urlInputView.inputView.element.value=t.trim()}isValid(){this.resetFormStatus();for(const t of this._validators){const e=t(this);if(e)return this.urlInputView.errorText=e,!1}return!0}resetFormStatus(){this.urlInputView.errorText=null,this.urlInputView.infoText=this._urlInputViewInfoDefault}_createUrlInput(){const t=this.locale.t,e=new zf(this.locale,Bf),n=e.inputView;return this._urlInputViewInfoDefault=t("be"),this._urlInputViewInfoTip=t("bf"),e.label=t("bg"),e.infoText=this._urlInputViewInfoDefault,n.placeholder="https://example.com",n.on("input",()=>{e.infoText=n.element.value?this._urlInputViewInfoTip:this._urlInputViewInfoDefault}),e}_createButton(t,e,n,i){const o=new ud(this.locale);return o.set({label:t,icon:e,tooltip:!0}),o.extendTemplate({attributes:{class:n}}),i&&o.delegate("execute").to(this,i),o}}var lp='';class dp extends Md{static get requires(){return[rp]}static get pluginName(){return"MediaEmbedUI"}init(){const t=this.editor,e=t.commands.get("mediaEmbed"),n=t.plugins.get(rp).registry;this.form=new cp(function(t,e){return[e=>{if(!e.url.length)return t("aq")},n=>{if(!e.hasMedia(n.url))return t("ar")}]}(t.t,n),t.locale),t.ui.componentFactory.add("mediaEmbed",n=>{const i=_d(n);return this._setUpDropdown(i,this.form,e,t),this._setUpForm(this.form,i,e),i})}_setUpDropdown(t,e,n){const i=this.editor,o=i.t,r=t.buttonView;function s(){i.editing.view.focus(),t.isOpen=!1}t.bind("isEnabled").to(n),t.panelView.children.add(e),r.set({label:o("ap"),icon:lp,tooltip:!0}),r.on("open",()=>{e.url=n.value||"",e.urlInputView.select(),e.focus()},{priority:"low"}),t.on("submit",()=>{e.isValid()&&(i.execute("mediaEmbed",e.url),s())}),t.on("change:isOpen",()=>e.resetFormStatus()),t.on("cancel",()=>s())}_setUpForm(t,e,n){t.delegate("submit","cancel").to(e),t.urlInputView.bind("value").to(n,"value"),t.urlInputView.bind("isReadOnly").to(n,"isEnabled",t=>!t),t.saveButtonView.bind("isEnabled").to(n)}}n(82);function hp(t,e){if(!t.childCount)return;const n=new vg,i=function(t,e){const n=e.createRangeIn(t),i=new wi({name:/^p|h\d+$/,styles:{"mso-list":/.*/}}),o=[];for(const t of n)if("elementStart"===t.type&&i.match(t.item)){const e=up(t.item);o.push({element:t.item,id:e.id,order:e.order,indent:e.indent})}return o}(t,n);if(!i.length)return;let o=null;i.forEach((t,r)=>{if(!o||function(t,e){if(t.id!==e.id)return!0;const 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":Array(e.length+1).join("  ").substr(0,e.length))}function pp(t){const e=new DOMParser,n=function(t){return mp(mp(t)).replace(/([\s]*?)[\r\n]+(\s*<\/span>)/g,"$1$2").replace(/<\/span>/g,"").replace(/ <\//g," <\/o:p>/g," ").replace(/( |\u00A0)<\/o:p>/g,"").replace(/>(\s*[\r\n]\s*)<")}(function(t){const e=t.match(/<\/body>(.*?)(<\/html>|$)/);e&&e[1]&&(t=t.slice(0,e.index)+t.slice(e.index).replace(e[1],""));return t}(t=t.replace(/

abc

\n\t\t\t//\n\t\t\tif ( isAttribute && this._wrapAttributeElement( wrapElement, child ) ) {\n\t\t\t\twrapPositions.push( new Position( parent, i ) );\n\t\t\t}\n\t\t\t//\n\t\t\t// Wrap the child if it is not an attribute element or if it is an attribute element that should be inside\n\t\t\t// `wrapElement` (due to priority).\n\t\t\t//\n\t\t\t//

abc

-->

abc

\n\t\t\t//

abc

-->

abc

\n\t\t\t//\n\t\t\telse if ( isText || isEmpty || isUI || ( isAttribute && shouldABeOutsideB( wrapElement, child ) ) ) {\n\t\t\t\t// Clone attribute.\n\t\t\t\tconst newAttribute = wrapElement._clone();\n\n\t\t\t\t// Wrap current node with new attribute.\n\t\t\t\tchild._remove();\n\t\t\t\tnewAttribute._appendChild( child );\n\n\t\t\t\tparent._insertChild( i, newAttribute );\n\t\t\t\tthis._addToClonedElementsGroup( newAttribute );\n\n\t\t\t\twrapPositions.push( new Position( parent, i ) );\n\t\t\t}\n\t\t\t//\n\t\t\t// If other nested attribute is found and it wasn't wrapped (see above), continue wrapping inside it.\n\t\t\t//\n\t\t\t//

abc

-->

abc

\n\t\t\t//\n\t\t\telse if ( isAttribute ) {\n\t\t\t\tthis._wrapChildren( child, 0, child.childCount, wrapElement );\n\t\t\t}\n\n\t\t\ti++;\n\t\t}\n\n\t\t// Merge at each wrap.\n\t\tlet offsetChange = 0;\n\n\t\tfor ( const position of wrapPositions ) {\n\t\t\tposition.offset -= offsetChange;\n\n\t\t\t// Do not merge with elements outside selected children.\n\t\t\tif ( position.offset == startOffset ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst newPosition = this.mergeAttributes( position );\n\n\t\t\t// If nodes were merged - other merge offsets will change.\n\t\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\t\toffsetChange++;\n\t\t\t\tendOffset--;\n\t\t\t}\n\t\t}\n\n\t\treturn Range._createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n\t}\n\n\t/**\n\t * Unwraps children from provided `unwrapElement`. Only children contained in `parent` element between\n\t * `startOffset` and `endOffset` will be unwrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} parent\n\t * @param {Number} startOffset\n\t * @param {Number} endOffset\n\t * @param {module:engine/view/element~Element} unwrapElement\n\t */\n\t_unwrapChildren( parent, startOffset, endOffset, unwrapElement ) {\n\t\tlet i = startOffset;\n\t\tconst unwrapPositions = [];\n\n\t\t// Iterate over each element between provided offsets inside parent.\n\t\t// We don't use tree walker or range iterator because we will be removing and merging potentially multiple nodes,\n\t\t// so it could get messy. It is safer to it manually in this case.\n\t\twhile ( i < endOffset ) {\n\t\t\tconst child = parent.getChild( i );\n\n\t\t\t// Skip all text nodes. There should be no container element's here either.\n\t\t\tif ( !child.is( 'attributeElement' ) ) {\n\t\t\t\ti++;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// (In all examples, assume that `unwrapElement` is `` element.)\n\t\t\t//\n\t\t\t// If the child is similar to the given attribute element, unwrap it - it will be completely removed.\n\t\t\t//\n\t\t\t//

abcxyz

-->

abcxyz

\n\t\t\t//\n\t\t\tif ( child.isSimilar( unwrapElement ) ) {\n\t\t\t\tconst unwrapped = child.getChildren();\n\t\t\t\tconst count = child.childCount;\n\n\t\t\t\t// Replace wrapper element with its children\n\t\t\t\tchild._remove();\n\t\t\t\tparent._insertChild( i, unwrapped );\n\n\t\t\t\tthis._removeFromClonedElementsGroup( child );\n\n\t\t\t\t// Save start and end position of moved items.\n\t\t\t\tunwrapPositions.push(\n\t\t\t\t\tnew Position( parent, i ),\n\t\t\t\t\tnew Position( parent, i + count )\n\t\t\t\t);\n\n\t\t\t\t// Skip elements that were unwrapped. Assuming there won't be another element to unwrap in child elements.\n\t\t\t\ti += count;\n\t\t\t\tendOffset += count - 1;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// If the child is not similar but is an attribute element, try partial unwrapping - remove the same attributes/styles/classes.\n\t\t\t// Partial unwrapping will happen only if the elements have the same name.\n\t\t\t//\n\t\t\t//

abcxyz

-->

abcxyz

\n\t\t\t//

abcxyz

-->

abcxyz

\n\t\t\t//\n\t\t\tif ( this._unwrapAttributeElement( unwrapElement, child ) ) {\n\t\t\t\tunwrapPositions.push(\n\t\t\t\t\tnew Position( parent, i ),\n\t\t\t\t\tnew Position( parent, i + 1 )\n\t\t\t\t);\n\n\t\t\t\ti++;\n\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t//\n\t\t\t// If other nested attribute is found, look through it's children for elements to unwrap.\n\t\t\t//\n\t\t\t//

abc

-->

abc

\n\t\t\t//\n\t\t\tthis._unwrapChildren( child, 0, child.childCount, unwrapElement );\n\n\t\t\ti++;\n\t\t}\n\n\t\t// Merge at each unwrap.\n\t\tlet offsetChange = 0;\n\n\t\tfor ( const position of unwrapPositions ) {\n\t\t\tposition.offset -= offsetChange;\n\n\t\t\t// Do not merge with elements outside selected children.\n\t\t\tif ( position.offset == startOffset || position.offset == endOffset ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tconst newPosition = this.mergeAttributes( position );\n\n\t\t\t// If nodes were merged - other merge offsets will change.\n\t\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\t\toffsetChange++;\n\t\t\t\tendOffset--;\n\t\t\t}\n\t\t}\n\n\t\treturn Range._createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n\t}\n\n\t/**\n\t * Helper function for `view.writer.wrap`. Wraps range with provided attribute element.\n\t * This method will also merge newly added attribute element with its siblings whenever possible.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t * @returns {module:engine/view/range~Range} New range after wrapping, spanning over wrapping attribute element.\n\t */\n\t_wrapRange( range, attribute ) {\n\t\t// Break attributes at range start and end.\n\t\tconst { start: breakStart, end: breakEnd } = this._breakAttributesRange( range, true );\n\t\tconst parentContainer = breakStart.parent;\n\n\t\t// Wrap all children with attribute.\n\t\tconst newRange = this._wrapChildren( parentContainer, breakStart.offset, breakEnd.offset, attribute );\n\n\t\t// Merge attributes at the both ends and return a new range.\n\t\tconst start = this.mergeAttributes( newRange.start );\n\n\t\t// If start position was merged - move end position back.\n\t\tif ( !start.isEqual( newRange.start ) ) {\n\t\t\tnewRange.end.offset--;\n\t\t}\n\t\tconst end = this.mergeAttributes( newRange.end );\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Helper function for {@link #wrap}. Wraps position with provided attribute element.\n\t * This method will also merge newly added attribute element with its siblings whenever possible.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n\t * an instance of {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} position\n\t * @param {module:engine/view/attributeelement~AttributeElement} attribute\n\t * @returns {module:engine/view/position~Position} New position after wrapping.\n\t */\n\t_wrapPosition( position, attribute ) {\n\t\t// Return same position when trying to wrap with attribute similar to position parent.\n\t\tif ( attribute.isSimilar( position.parent ) ) {\n\t\t\treturn movePositionToTextNode( position.clone() );\n\t\t}\n\n\t\t// When position is inside text node - break it and place new position between two text nodes.\n\t\tif ( position.parent.is( 'text' ) ) {\n\t\t\tposition = breakTextNode( position );\n\t\t}\n\n\t\t// Create fake element that will represent position, and will not be merged with other attributes.\n\t\tconst fakePosition = this.createAttributeElement();\n\t\tfakePosition._priority = Number.POSITIVE_INFINITY;\n\t\tfakePosition.isSimilar = () => false;\n\n\t\t// Insert fake element in position location.\n\t\tposition.parent._insertChild( position.offset, fakePosition );\n\n\t\t// Range around inserted fake attribute element.\n\t\tconst wrapRange = new Range( position, position.getShiftedBy( 1 ) );\n\n\t\t// Wrap fake element with attribute (it will also merge if possible).\n\t\tthis.wrap( wrapRange, attribute );\n\n\t\t// Remove fake element and place new position there.\n\t\tconst newPosition = new Position( fakePosition.parent, fakePosition.index );\n\t\tfakePosition._remove();\n\n\t\t// If position is placed between text nodes - merge them and return position inside.\n\t\tconst nodeBefore = newPosition.nodeBefore;\n\t\tconst nodeAfter = newPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof Text && nodeAfter instanceof Text ) {\n\t\t\treturn mergeTextNodes( nodeBefore, nodeAfter );\n\t\t}\n\n\t\t// If position is next to text node - move position inside.\n\t\treturn movePositionToTextNode( newPosition );\n\t}\n\n\t/**\n\t * \tWraps one {@link module:engine/view/attributeelement~AttributeElement AttributeElement} into another by\n\t * \tmerging them if possible. When merging is possible - all attributes, styles and classes are moved from wrapper\n\t * \telement to element being wrapped.\n\t *\n\t * \t@private\n\t * \t@param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n\t * \t@param {module:engine/view/attributeelement~AttributeElement} toWrap AttributeElement to wrap using wrapper element.\n\t * \t@returns {Boolean} Returns `true` if elements are merged.\n\t */\n\t_wrapAttributeElement( wrapper, toWrap ) {\n\t\tif ( !canBeJoined( wrapper, toWrap ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Can't merge if name or priority differs.\n\t\tif ( wrapper.name !== toWrap.name || wrapper.priority !== toWrap.priority ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if attributes can be merged.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If some attributes are different we cannot wrap.\n\t\t\tif ( toWrap.hasAttribute( key ) && toWrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if styles can be merged.\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\tif ( toWrap.hasStyle( key ) && toWrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Move all attributes/classes/styles from wrapper to wrapped AttributeElement.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// Move only these attributes that are not present - other are similar.\n\t\t\tif ( !toWrap.hasAttribute( key ) ) {\n\t\t\t\tthis.setAttribute( key, wrapper.getAttribute( key ), toWrap );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\tif ( !toWrap.hasStyle( key ) ) {\n\t\t\t\tthis.setStyle( key, wrapper.getStyle( key ), toWrap );\n\t\t\t}\n\t\t}\n\n\t\tfor ( const key of wrapper.getClassNames() ) {\n\t\t\tif ( !toWrap.hasClass( key ) ) {\n\t\t\t\tthis.addClass( key, toWrap );\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Unwraps {@link module:engine/view/attributeelement~AttributeElement AttributeElement} from another by removing\n\t * corresponding attributes, classes and styles. All attributes, classes and styles from wrapper should be present\n\t * inside element being unwrapped.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n\t * @param {module:engine/view/attributeelement~AttributeElement} toUnwrap AttributeElement to unwrap using wrapper element.\n\t * @returns {Boolean} Returns `true` if elements are unwrapped.\n\t **/\n\t_unwrapAttributeElement( wrapper, toUnwrap ) {\n\t\tif ( !canBeJoined( wrapper, toUnwrap ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Can't unwrap if name or priority differs.\n\t\tif ( wrapper.name !== toUnwrap.name || wrapper.priority !== toUnwrap.priority ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper attributes.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\t// If some attributes are missing or different we cannot unwrap.\n\t\t\tif ( !toUnwrap.hasAttribute( key ) || toUnwrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper classes.\n\t\tif ( !toUnwrap.hasClass( ...wrapper.getClassNames() ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if AttributeElement has all wrapper styles.\n\t\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t\t// If some styles are missing or different we cannot unwrap.\n\t\t\tif ( !toUnwrap.hasStyle( key ) || toUnwrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Remove all wrapper's attributes from unwrapped element.\n\t\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t\t// Classes and styles should be checked separately.\n\t\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tthis.removeAttribute( key, toUnwrap );\n\t\t}\n\n\t\t// Remove all wrapper's classes from unwrapped element.\n\t\tthis.removeClass( Array.from( wrapper.getClassNames() ), toUnwrap );\n\n\t\t// Remove all wrapper's styles from unwrapped element.\n\t\tthis.removeStyle( Array.from( wrapper.getStyleNames() ), toUnwrap );\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Helper function used by other `DowncastWriter` methods. Breaks attribute elements at the boundaries of given range.\n\t *\n\t * @private\n\t * @param {module:engine/view/range~Range} range Range which `start` and `end` positions will be used to break attributes.\n\t * @param {Boolean} [forceSplitText=false] If set to `true`, will break text nodes even if they are directly in container element.\n\t * This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.\n\t * @returns {module:engine/view/range~Range} New range with located at break positions.\n\t */\n\t_breakAttributesRange( range, forceSplitText = false ) {\n\t\tconst rangeStart = range.start;\n\t\tconst rangeEnd = range.end;\n\n\t\tvalidateRangeContainer( range, this.document );\n\n\t\t// Break at the collapsed position. Return new collapsed range.\n\t\tif ( range.isCollapsed ) {\n\t\t\tconst position = this._breakAttributes( range.start, forceSplitText );\n\n\t\t\treturn new Range( position, position );\n\t\t}\n\n\t\tconst breakEnd = this._breakAttributes( rangeEnd, forceSplitText );\n\t\tconst count = breakEnd.parent.childCount;\n\t\tconst breakStart = this._breakAttributes( rangeStart, forceSplitText );\n\n\t\t// Calculate new break end offset.\n\t\tbreakEnd.offset += breakEnd.parent.childCount - count;\n\n\t\treturn new Range( breakStart, breakEnd );\n\t}\n\n\t/**\n\t * Helper function used by other `DowncastWriter` methods. Breaks attribute elements at given position.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element` when break position\n\t * is placed inside {@link module:engine/view/emptyelement~EmptyElement EmptyElement}.\n\t *\n\t * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element` when break position\n\t * is placed inside {@link module:engine/view/uielement~UIElement UIElement}.\n\t *\n\t * @private\n\t * @param {module:engine/view/position~Position} position Position where to break attributes.\n\t * @param {Boolean} [forceSplitText=false] If set to `true`, will break text nodes even if they are directly in container element.\n\t * This behavior will result in incorrect view state, but is needed by other view writing methods which then fixes view state.\n\t * @returns {module:engine/view/position~Position} New position after breaking the attributes.\n\t */\n\t_breakAttributes( position, forceSplitText = false ) {\n\t\tconst positionOffset = position.offset;\n\t\tconst positionParent = position.parent;\n\n\t\t// If position is placed inside EmptyElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'emptyElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break inside EmptyElement instance.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-empty-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-empty-element', this.document );\n\t\t}\n\n\t\t// If position is placed inside UIElement - throw an exception as we cannot break inside.\n\t\tif ( position.parent.is( 'uiElement' ) ) {\n\t\t\t/**\n\t\t\t * Cannot break inside UIElement instance.\n\t\t\t *\n\t\t\t * @error view-writer-cannot-break-ui-element\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-cannot-break-ui-element', this.document );\n\t\t}\n\n\t\t// There are no attributes to break and text nodes breaking is not forced.\n\t\tif ( !forceSplitText && positionParent.is( 'text' ) && isContainerOrFragment( positionParent.parent ) ) {\n\t\t\treturn position.clone();\n\t\t}\n\n\t\t// Position's parent is container, so no attributes to break.\n\t\tif ( isContainerOrFragment( positionParent ) ) {\n\t\t\treturn position.clone();\n\t\t}\n\n\t\t// Break text and start again in new position.\n\t\tif ( positionParent.is( 'text' ) ) {\n\t\t\treturn this._breakAttributes( breakTextNode( position ), forceSplitText );\n\t\t}\n\n\t\tconst length = positionParent.childCount;\n\n\t\t//

foobar{}

\n\t\t//

foobar[]

\n\t\t//

foobar[]

\n\t\tif ( positionOffset == length ) {\n\t\t\tconst newPosition = new Position( positionParent.parent, positionParent.index + 1 );\n\n\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t} else {\n\t\t\t//

foo{}bar

\n\t\t\t//

foo[]bar

\n\t\t\t//

foo{}bar

\n\t\t\tif ( positionOffset === 0 ) {\n\t\t\t\tconst newPosition = new Position( positionParent.parent, positionParent.index );\n\n\t\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t\t}\n\t\t\t//

foob{}ar

\n\t\t\t//

foob[]ar

\n\t\t\t//

foob[]ar

\n\t\t\t//

foob[]ar

\n\t\t\telse {\n\t\t\t\tconst offsetAfter = positionParent.index + 1;\n\n\t\t\t\t// Break element.\n\t\t\t\tconst clonedNode = positionParent._clone();\n\n\t\t\t\t// Insert cloned node to position's parent node.\n\t\t\t\tpositionParent.parent._insertChild( offsetAfter, clonedNode );\n\t\t\t\tthis._addToClonedElementsGroup( clonedNode );\n\n\t\t\t\t// Get nodes to move.\n\t\t\t\tconst count = positionParent.childCount - positionOffset;\n\t\t\t\tconst nodesToMove = positionParent._removeChildren( positionOffset, count );\n\n\t\t\t\t// Move nodes to cloned node.\n\t\t\t\tclonedNode._appendChild( nodesToMove );\n\n\t\t\t\t// Create new position to work on.\n\t\t\t\tconst newPosition = new Position( positionParent.parent, offsetAfter );\n\n\t\t\t\treturn this._breakAttributes( newPosition, forceSplitText );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Stores the information that an {@link module:engine/view/attributeelement~AttributeElement attribute element} was\n\t * added to the tree. Saves the reference to the group in the given element and updates the group, so other elements\n\t * from the group now keep a reference to the given attribute element.\n\t *\n\t * The clones group can be obtained using {@link module:engine/view/attributeelement~AttributeElement#getElementsWithSameId}.\n\t *\n\t * Does nothing if added element has no {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} element Attribute element to save.\n\t */\n\t_addToClonedElementsGroup( element ) {\n\t\t// Add only if the element is in document tree.\n\t\tif ( !element.root.is( 'rootElement' ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Traverse the element's children recursively to find other attribute elements that also might got inserted.\n\t\t// The loop is at the beginning so we can make fast returns later in the code.\n\t\tif ( element.is( 'element' ) ) {\n\t\t\tfor ( const child of element.getChildren() ) {\n\t\t\t\tthis._addToClonedElementsGroup( child );\n\t\t\t}\n\t\t}\n\n\t\tconst id = element.id;\n\n\t\tif ( !id ) {\n\t\t\treturn;\n\t\t}\n\n\t\tlet group = this._cloneGroups.get( id );\n\n\t\tif ( !group ) {\n\t\t\tgroup = new Set();\n\t\t\tthis._cloneGroups.set( id, group );\n\t\t}\n\n\t\tgroup.add( element );\n\t\telement._clonesGroup = group;\n\t}\n\n\t/**\n\t * Removes all the information about the given {@link module:engine/view/attributeelement~AttributeElement attribute element}\n\t * from its clones group.\n\t *\n\t * Keep in mind, that the element will still keep a reference to the group (but the group will not keep a reference to it).\n\t * This allows to reference the whole group even if the element was already removed from the tree.\n\t *\n\t * Does nothing if the element has no {@link module:engine/view/attributeelement~AttributeElement#id id}.\n\t *\n\t * @private\n\t * @param {module:engine/view/attributeelement~AttributeElement} element Attribute element to remove.\n\t */\n\t_removeFromClonedElementsGroup( element ) {\n\t\t// Traverse the element's children recursively to find other attribute elements that also got removed.\n\t\t// The loop is at the beginning so we can make fast returns later in the code.\n\t\tif ( element.is( 'element' ) ) {\n\t\t\tfor ( const child of element.getChildren() ) {\n\t\t\t\tthis._removeFromClonedElementsGroup( child );\n\t\t\t}\n\t\t}\n\n\t\tconst id = element.id;\n\n\t\tif ( !id ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst group = this._cloneGroups.get( id );\n\n\t\tif ( !group ) {\n\t\t\treturn;\n\t\t}\n\n\t\tgroup.delete( element );\n\t\t// Not removing group from element on purpose!\n\t\t// If other parts of code have reference to this element, they will be able to get references to other elements from the group.\n\t}\n}\n\n// Helper function for `view.writer.wrap`. Checks if given element has any children that are not ui elements.\nfunction _hasNonUiChildren( parent ) {\n\treturn Array.from( parent.getChildren() ).some( child => !child.is( 'uiElement' ) );\n}\n\n/**\n * Attribute element need to be instance of attribute element.\n *\n * @error view-writer-wrap-invalid-attribute\n */\n\n// Returns first parent container of specified {@link module:engine/view/position~Position Position}.\n// Position's parent node is checked as first, then next parents are checked.\n// Note that {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment} is treated like a container.\n//\n// @param {module:engine/view/position~Position} position Position used as a start point to locate parent container.\n// @returns {module:engine/view/containerelement~ContainerElement|module:engine/view/documentfragment~DocumentFragment|undefined}\n// Parent container element or `undefined` if container is not found.\nfunction getParentContainer( position ) {\n\tlet parent = position.parent;\n\n\twhile ( !isContainerOrFragment( parent ) ) {\n\t\tif ( !parent ) {\n\t\t\treturn undefined;\n\t\t}\n\t\tparent = parent.parent;\n\t}\n\n\treturn parent;\n}\n\n// Checks if first {@link module:engine/view/attributeelement~AttributeElement AttributeElement} provided to the function\n// can be wrapped otuside second element. It is done by comparing elements'\n// {@link module:engine/view/attributeelement~AttributeElement#priority priorities}, if both have same priority\n// {@link module:engine/view/element~Element#getIdentity identities} are compared.\n//\n// @param {module:engine/view/attributeelement~AttributeElement} a\n// @param {module:engine/view/attributeelement~AttributeElement} b\n// @returns {Boolean}\nfunction shouldABeOutsideB( a, b ) {\n\tif ( a.priority < b.priority ) {\n\t\treturn true;\n\t} else if ( a.priority > b.priority ) {\n\t\treturn false;\n\t}\n\n\t// When priorities are equal and names are different - use identities.\n\treturn a.getIdentity() < b.getIdentity();\n}\n\n// Returns new position that is moved to near text node. Returns same position if there is no text node before of after\n// specified position.\n//\n//\t\t

foo[]

->

foo{}

\n//\t\t

[]foo

->

{}foo

\n//\n// @param {module:engine/view/position~Position} position\n// @returns {module:engine/view/position~Position} Position located inside text node or same position if there is no text nodes\n// before or after position location.\nfunction movePositionToTextNode( position ) {\n\tconst nodeBefore = position.nodeBefore;\n\n\tif ( nodeBefore && nodeBefore.is( 'text' ) ) {\n\t\treturn new Position( nodeBefore, nodeBefore.data.length );\n\t}\n\n\tconst nodeAfter = position.nodeAfter;\n\n\tif ( nodeAfter && nodeAfter.is( 'text' ) ) {\n\t\treturn new Position( nodeAfter, 0 );\n\t}\n\n\treturn position;\n}\n\n// Breaks text node into two text nodes when possible.\n//\n//\t\t

foo{}bar

->

foo[]bar

\n//\t\t

{}foobar

->

[]foobar

\n//\t\t

foobar{}

->

foobar[]

\n//\n// @param {module:engine/view/position~Position} position Position that need to be placed inside text node.\n// @returns {module:engine/view/position~Position} New position after breaking text node.\nfunction breakTextNode( position ) {\n\tif ( position.offset == position.parent.data.length ) {\n\t\treturn new Position( position.parent.parent, position.parent.index + 1 );\n\t}\n\n\tif ( position.offset === 0 ) {\n\t\treturn new Position( position.parent.parent, position.parent.index );\n\t}\n\n\t// Get part of the text that need to be moved.\n\tconst textToMove = position.parent.data.slice( position.offset );\n\n\t// Leave rest of the text in position's parent.\n\tposition.parent._data = position.parent.data.slice( 0, position.offset );\n\n\t// Insert new text node after position's parent text node.\n\tposition.parent.parent._insertChild( position.parent.index + 1, new Text( textToMove ) );\n\n\t// Return new position between two newly created text nodes.\n\treturn new Position( position.parent.parent, position.parent.index + 1 );\n}\n\n// Merges two text nodes into first node. Removes second node and returns merge position.\n//\n// @param {module:engine/view/text~Text} t1 First text node to merge. Data from second text node will be moved at the end of\n// this text node.\n// @param {module:engine/view/text~Text} t2 Second text node to merge. This node will be removed after merging.\n// @returns {module:engine/view/position~Position} Position after merging text nodes.\nfunction mergeTextNodes( t1, t2 ) {\n\t// Merge text data into first text node and remove second one.\n\tconst nodeBeforeLength = t1.data.length;\n\tt1._data += t2.data;\n\tt2._remove();\n\n\treturn new Position( t1, nodeBeforeLength );\n}\n\n// Checks if provided nodes are valid to insert. Checks if each node is an instance of\n// {@link module:engine/view/text~Text Text} or {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n// {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n// {@link module:engine/view/emptyelement~EmptyElement EmptyElement} or\n// {@link module:engine/view/uielement~UIElement UIElement}.\n//\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert\n// contains instances that are not {@link module:engine/view/text~Text Texts},\n// {@link module:engine/view/emptyelement~EmptyElement EmptyElements},\n// {@link module:engine/view/uielement~UIElement UIElements},\n// {@link module:engine/view/attributeelement~AttributeElement AttributeElements} or\n// {@link module:engine/view/containerelement~ContainerElement ContainerElements}.\n//\n// @param Iterable. nodes\n// @param {Object} errorContext\nfunction validateNodesToInsert( nodes, errorContext ) {\n\tfor ( const node of nodes ) {\n\t\tif ( !validNodesToInsert.some( ( validNode => node instanceof validNode ) ) ) { // eslint-disable-line no-use-before-define\n\t\t\t/**\n\t\t\t * Inserted nodes should be valid to insert. of {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n\t\t\t * {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n\t\t\t * {@link module:engine/view/emptyelement~EmptyElement EmptyElement},\n\t\t\t * {@link module:engine/view/uielement~UIElement UIElement}, {@link module:engine/view/text~Text Text}.\n\t\t\t *\n\t\t\t * @error view-writer-insert-invalid-node\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-insert-invalid-node', errorContext );\n\t\t}\n\n\t\tif ( !node.is( 'text' ) ) {\n\t\t\tvalidateNodesToInsert( node.getChildren(), errorContext );\n\t\t}\n\t}\n}\n\nconst validNodesToInsert = [ Text, AttributeElement, ContainerElement, EmptyElement, UIElement ];\n\n// Checks if node is ContainerElement or DocumentFragment, because in most cases they should be treated the same way.\n//\n// @param {module:engine/view/node~Node} node\n// @returns {Boolean} Returns `true` if node is instance of ContainerElement or DocumentFragment.\nfunction isContainerOrFragment( node ) {\n\treturn node && ( node.is( 'containerElement' ) || node.is( 'documentFragment' ) );\n}\n\n// Checks if {@link module:engine/view/range~Range#start range start} and {@link module:engine/view/range~Range#end range end} are placed\n// inside same {@link module:engine/view/containerelement~ContainerElement container element}.\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when validation fails.\n//\n// @param {module:engine/view/range~Range} range\n// @param {Object} errorContext\nfunction validateRangeContainer( range, errorContext ) {\n\tconst startContainer = getParentContainer( range.start );\n\tconst endContainer = getParentContainer( range.end );\n\n\tif ( !startContainer || !endContainer || startContainer !== endContainer ) {\n\t\t/**\n\t\t * Range container is invalid. This can happen if {@link module:engine/view/range~Range#start range start} and\n\t\t * {@link module:engine/view/range~Range#end range end} positions are not placed inside same container or\n\t\t * parent container for these positions cannot be found.\n\t\t *\n\t\t * @error view-writer-invalid-range-container\n\t\t */\n\n\t\tthrow new CKEditorError( 'view-writer-invalid-range-container', errorContext );\n\t}\n}\n\n// Checks if two attribute elements can be joined together. Elements can be joined together if, and only if\n// they do not have ids specified.\n//\n// @private\n// @param {module:engine/view/element~Element} a\n// @param {module:engine/view/element~Element} b\n// @returns {Boolean}\nfunction canBeJoined( a, b ) {\n\treturn a.id === null && b.id === null;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/istext\n */\n\n/**\n * Checks if the object is a native DOM Text node.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isText( obj ) {\n\treturn Object.prototype.toString.call( obj ) == '[object Text]';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\n\n/**\n * Set of utils related to block and inline fillers handling.\n *\n * Browsers do not allow to put caret in elements which does not have height. Because of it, we need to fill all\n * empty elements which should be selectable with elements or characters called \"fillers\". Unfortunately there is no one\n * universal filler, this is why two types are uses:\n *\n * * Block filler is an element which fill block elements, like `

`. CKEditor uses `
` as a block filler during the editing,\n * as browsers do natively. So instead of an empty `

` there will be `


`. The advantage of block filler is that\n * it is transparent for the selection, so when the caret is before the `
` and user presses right arrow he will be\n * moved to the next paragraph, not after the `
`. The disadvantage is that it breaks a block, so it can not be used\n * in the middle of a line of text. The {@link module:engine/view/filler~BR_FILLER `
` filler} can be replaced with any other\n * character in the data output, for instance {@link module:engine/view/filler~NBSP_FILLER non-breaking space}.\n *\n * * Inline filler is a filler which does not break a line of text, so it can be used inside the text, for instance in the empty\n * `` surrendered by text: `foobar`, if we want to put the caret there. CKEditor uses a sequence of the zero-width\n * spaces as an {@link module:engine/view/filler~INLINE_FILLER inline filler} having the predetermined\n * {@link module:engine/view/filler~INLINE_FILLER_LENGTH length}. A sequence is used, instead of a single character to\n * avoid treating random zero-width spaces as the inline filler. Disadvantage of the inline filler is that it is not\n * transparent for the selection. The arrow key moves the caret between zero-width spaces characters, so the additional\n * code is needed to handle the caret.\n *\n * Both inline and block fillers are handled by the {@link module:engine/view/renderer~Renderer renderer} and are not present in the\n * view.\n *\n * @module engine/view/filler\n */\n\n/**\n * Non-breaking space filler creator. This is a function which creates ` ` text node.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~BR_FILLER\n * @function\n */\nexport const NBSP_FILLER = domDocument => domDocument.createTextNode( '\\u00A0' );\n\n/**\n * `
` filler creator. This is a function which creates `
` element.\n * It defines how the filler is created.\n *\n * @see module:engine/view/filler~NBSP_FILLER\n * @function\n */\nexport const BR_FILLER = domDocument => {\n\tconst fillerBr = domDocument.createElement( 'br' );\n\tfillerBr.dataset.ckeFiller = true;\n\n\treturn fillerBr;\n};\n\n/**\n * Length of the {@link module:engine/view/filler~INLINE_FILLER INLINE_FILLER}.\n */\nexport const INLINE_FILLER_LENGTH = 7;\n\n/**\n * Inline filler which is a sequence of the zero width spaces.\n */\nexport const INLINE_FILLER = ( () => {\n\tlet inlineFiller = '';\n\n\tfor ( let i = 0; i < INLINE_FILLER_LENGTH; i++ ) {\n\t\tinlineFiller += '\\u200b';\n\t}\n\n\treturn inlineFiller;\n} )(); // Usu IIF so the INLINE_FILLER appears as a constant in the docs.\n\n/**\n * Checks if the node is a text node which starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n *\n *\t\tstartsWithFiller( document.createTextNode( INLINE_FILLER ) ); // true\n *\t\tstartsWithFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // true\n *\t\tstartsWithFiller( document.createTextNode( 'foo' ) ); // false\n *\t\tstartsWithFiller( document.createElement( 'p' ) ); // false\n *\n * @param {Node} domNode DOM node.\n * @returns {Boolean} True if the text node starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n */\nexport function startsWithFiller( domNode ) {\n\treturn isText( domNode ) && ( domNode.data.substr( 0, INLINE_FILLER_LENGTH ) === INLINE_FILLER );\n}\n\n/**\n * Checks if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n *\n *\t\tisInlineFiller( document.createTextNode( INLINE_FILLER ) ); // true\n *\t\tisInlineFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // false\n *\n * @param {Text} domText DOM text node.\n * @returns {Boolean} True if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.\n */\nexport function isInlineFiller( domText ) {\n\treturn domText.data.length == INLINE_FILLER_LENGTH && startsWithFiller( domText );\n}\n\n/**\n * Get string data from the text node, removing an {@link module:engine/view/filler~INLINE_FILLER inline filler} from it,\n * if text node contains it.\n *\n *\t\tgetDataWithoutFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ) == 'foo' // true\n *\t\tgetDataWithoutFiller( document.createTextNode( 'foo' ) ) == 'foo' // true\n *\n * @param {Text} domText DOM text node, possible with inline filler.\n * @returns {String} Data without filler.\n */\nexport function getDataWithoutFiller( domText ) {\n\tif ( startsWithFiller( domText ) ) {\n\t\treturn domText.data.slice( INLINE_FILLER_LENGTH );\n\t} else {\n\t\treturn domText.data;\n\t}\n}\n\n/**\n * Assign key observer which move cursor from the end of the inline filler to the beginning of it when\n * the left arrow is pressed, so the filler does not break navigation.\n *\n * @param {module:engine/view/view~View} view View controller instance we should inject quirks handling on.\n */\nexport function injectQuirksHandling( view ) {\n\tview.document.on( 'keydown', jumpOverInlineFiller );\n}\n\n// Move cursor from the end of the inline filler to the beginning of it when, so the filler does not break navigation.\nfunction jumpOverInlineFiller( evt, data ) {\n\tif ( data.keyCode == keyCodes.arrowleft ) {\n\t\tconst domSelection = data.domTarget.ownerDocument.defaultView.getSelection();\n\n\t\tif ( domSelection.rangeCount == 1 && domSelection.getRangeAt( 0 ).collapsed ) {\n\t\t\tconst domParent = domSelection.getRangeAt( 0 ).startContainer;\n\t\t\tconst domOffset = domSelection.getRangeAt( 0 ).startOffset;\n\n\t\t\tif ( startsWithFiller( domParent ) && domOffset <= INLINE_FILLER_LENGTH ) {\n\t\t\t\tdomSelection.collapse( domParent, 0 );\n\t\t\t}\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/fastdiff\n */\n\n/**\n * Finds positions of the first and last change in the given string/array and generates a set of changes:\n *\n *\t\tfastDiff( '12a', '12xyza' );\n *\t\t// [ { index: 2, type: 'insert', values: [ 'x', 'y', 'z' ] } ]\n *\n *\t\tfastDiff( '12a', '12aa' );\n *\t\t// [ { index: 3, type: 'insert', values: [ 'a' ] } ]\n *\n *\t\tfastDiff( '12xyza', '12a' );\n *\t\t// [ { index: 2, type: 'delete', howMany: 3 } ]\n *\n *\t\tfastDiff( [ '1', '2', 'a', 'a' ], [ '1', '2', 'a' ] );\n *\t\t// [ { index: 3, type: 'delete', howMany: 1 } ]\n *\n *\t\tfastDiff( [ '1', '2', 'a', 'b', 'c', '3' ], [ '2', 'a', 'b' ] );\n *\t\t// [ { index: 0, type: 'insert', values: [ '2', 'a', 'b' ] }, { index: 3, type: 'delete', howMany: 6 } ]\n *\n * Passed arrays can contain any type of data, however to compare them correctly custom comparator function\n * should be passed as a third parameter:\n *\n *\t\tfastDiff( [ { value: 1 }, { value: 2 } ], [ { value: 1 }, { value: 3 } ], ( a, b ) => {\n *\t\t\treturn a.value === b.value;\n *\t\t} );\n *\t\t// [ { index: 1, type: 'insert', values: [ { value: 3 } ] }, { index: 2, type: 'delete', howMany: 1 } ]\n *\n * The resulted set of changes can be applied to the input in order to transform it into the output, for example:\n *\n *\t\tlet input = '12abc3';\n *\t\tconst output = '2ab';\n *\t\tconst changes = fastDiff( input, output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput = input.substring( 0, change.index ) + change.values.join( '' ) + input.substring( change.index );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput = input.substring( 0, change.index ) + input.substring( change.index + change.howMany );\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// input equals output now\n *\n * or in case of arrays:\n *\n *\t\tlet input = [ '1', '2', 'a', 'b', 'c', '3' ];\n *\t\tconst output = [ '2', 'a', 'b' ];\n *\t\tconst changes = fastDiff( input, output );\n *\n *\t\tchanges.forEach( change => {\n *\t\t\tif ( change.type == 'insert' ) {\n *\t\t\t\tinput = input.slice( 0, change.index ).concat( change.values, input.slice( change.index ) );\n *\t\t\t} else if ( change.type == 'delete' ) {\n *\t\t\t\tinput = input.slice( 0, change.index ).concat( input.slice( change.index + change.howMany ) );\n *\t\t\t}\n *\t\t} );\n *\n *\t\t// input equals output now\n *\n * By passing `true` as the fourth parameter (`atomicChanges`) the output of this function will become compatible with\n * the {@link module:utils/diff~diff `diff()`} function:\n *\n *\t\tfastDiff( '12a', '12xyza' );\n *\t\t// [ 'equal', 'equal', 'insert', 'insert', 'insert', 'equal' ]\n *\n * The default output format of this function is compatible with the output format of\n * {@link module:utils/difftochanges~diffToChanges `diffToChanges()`}. The `diffToChanges()` input format is, in turn,\n * compatible with the output of {@link module:utils/diff~diff `diff()`}:\n *\n *\t\tconst a = '1234';\n *\t\tconst b = '12xyz34';\n *\n *\t\t// Both calls will return the same results (grouped changes format).\n *\t\tfastDiff( a, b );\n *\t\tdiffToChanges( diff( a, b ) );\n *\n *\t\t// Again, both calls will return the same results (atomic changes format).\n *\t\tfastDiff( a, b, null, true );\n *\t\tdiff( a, b );\n *\n *\n * @param {Array|String} a Input array or string.\n * @param {Array|String} b Input array or string.\n * @param {Function} [cmp] Optional function used to compare array values, by default `===` (strict equal operator) is used.\n * @param {Boolean} [atomicChanges=false] Whether an array of `inset|delete|equal` operations should\n * be returned instead of changes set. This makes this function compatible with {@link module:utils/diff~diff `diff()`}.\n * @returns {Array} Array of changes.\n */\nexport default function fastDiff( a, b, cmp, atomicChanges = false ) {\n\t// Set the comparator function.\n\tcmp = cmp || function( a, b ) {\n\t\treturn a === b;\n\t};\n\n\t// Transform text or any iterable into arrays for easier, consistent processing.\n\tif ( !Array.isArray( a ) ) {\n\t\ta = Array.from( a );\n\t}\n\n\tif ( !Array.isArray( b ) ) {\n\t\tb = Array.from( b );\n\t}\n\n\t// Find first and last change.\n\tconst changeIndexes = findChangeBoundaryIndexes( a, b, cmp );\n\n\t// Transform into changes array.\n\treturn atomicChanges ? changeIndexesToAtomicChanges( changeIndexes, b.length ) : changeIndexesToChanges( b, changeIndexes );\n}\n\n// Finds position of the first and last change in the given arrays. For example:\n//\n//\t\tconst indexes = findChangeBoundaryIndexes( [ '1', '2', '3', '4' ], [ '1', '3', '4', '2', '4' ] );\n//\t\tconsole.log( indexes ); // { firstIndex: 1, lastIndexOld: 3, lastIndexNew: 4 }\n//\n// The above indexes means that in the first array the modified part is `1[23]4` and in the second array it is `1[342]4`.\n// Based on such indexes, array with `insert`/`delete` operations which allows transforming first value into the second one\n// can be generated.\n//\n// @param {Array} arr1\n// @param {Array} arr2\n// @param {Function} cmp Comparator function.\n// @returns {Object}\n// @returns {Number} return.firstIndex Index of the first change in both values (always the same for both).\n// @returns {Number} result.lastIndexOld Index of the last common value in `arr1`.\n// @returns {Number} result.lastIndexNew Index of the last common value in `arr2`.\nfunction findChangeBoundaryIndexes( arr1, arr2, cmp ) {\n\t// Find the first difference between passed values.\n\tconst firstIndex = findFirstDifferenceIndex( arr1, arr2, cmp );\n\n\t// If arrays are equal return -1 indexes object.\n\tif ( firstIndex === -1 ) {\n\t\treturn { firstIndex: -1, lastIndexOld: -1, lastIndexNew: -1 };\n\t}\n\n\t// Remove the common part of each value and reverse them to make it simpler to find the last difference between them.\n\tconst oldArrayReversed = cutAndReverse( arr1, firstIndex );\n\tconst newArrayReversed = cutAndReverse( arr2, firstIndex );\n\n\t// Find the first difference between reversed values.\n\t// It should be treated as \"how many elements from the end the last difference occurred\".\n\t//\n\t// For example:\n\t//\n\t// \t\t\t\tinitial\t->\tafter cut\t-> reversed:\n\t// oldValue:\t'321ba'\t->\t'21ba'\t\t-> 'ab12'\n\t// newValue:\t'31xba'\t->\t'1xba'\t\t-> 'abx1'\n\t// lastIndex:\t\t\t\t\t\t\t-> 2\n\t//\n\t// So the last change occurred two characters from the end of the arrays.\n\tconst lastIndex = findFirstDifferenceIndex( oldArrayReversed, newArrayReversed, cmp );\n\n\t// Use `lastIndex` to calculate proper offset, starting from the beginning (`lastIndex` kind of starts from the end).\n\tconst lastIndexOld = arr1.length - lastIndex;\n\tconst lastIndexNew = arr2.length - lastIndex;\n\n\treturn { firstIndex, lastIndexOld, lastIndexNew };\n}\n\n// Returns a first index on which given arrays differ. If both arrays are the same, -1 is returned.\n//\n// @param {Array} arr1\n// @param {Array} arr2\n// @param {Function} cmp Comparator function.\n// @returns {Number}\nfunction findFirstDifferenceIndex( arr1, arr2, cmp ) {\n\tfor ( let i = 0; i < Math.max( arr1.length, arr2.length ); i++ ) {\n\t\tif ( arr1[ i ] === undefined || arr2[ i ] === undefined || !cmp( arr1[ i ], arr2[ i ] ) ) {\n\t\t\treturn i;\n\t\t}\n\t}\n\n\treturn -1; // Return -1 if arrays are equal.\n}\n\n// Returns a copy of the given array with `howMany` elements removed starting from the beginning and in reversed order.\n//\n// @param {Array} arr Array to be processed.\n// @param {Number} howMany How many elements from array beginning to remove.\n// @returns {Array} Shortened and reversed array.\nfunction cutAndReverse( arr, howMany ) {\n\treturn arr.slice( howMany ).reverse();\n}\n\n// Generates changes array based on change indexes from `findChangeBoundaryIndexes` function. This function will\n// generate array with 0 (no changes), 1 (deletion or insertion) or 2 records (insertion and deletion).\n//\n// @param {Array} newArray New array for which change indexes were calculated.\n// @param {Object} changeIndexes Change indexes object from `findChangeBoundaryIndexes` function.\n// @returns {Array.} Array of changes compatible with {@link module:utils/difftochanges~diffToChanges} format.\nfunction changeIndexesToChanges( newArray, changeIndexes ) {\n\tconst result = [];\n\tconst { firstIndex, lastIndexOld, lastIndexNew } = changeIndexes;\n\n\t// Order operations as 'insert', 'delete' array to keep compatibility with {@link module:utils/difftochanges~diffToChanges}\n\t// in most cases. However, 'diffToChanges' does not stick to any order so in some cases\n\t// (for example replacing '12345' with 'abcd') it will generate 'delete', 'insert' order.\n\tif ( lastIndexNew - firstIndex > 0 ) {\n\t\tresult.push( {\n\t\t\tindex: firstIndex,\n\t\t\ttype: 'insert',\n\t\t\tvalues: newArray.slice( firstIndex, lastIndexNew )\n\t\t} );\n\t}\n\n\tif ( lastIndexOld - firstIndex > 0 ) {\n\t\tresult.push( {\n\t\t\tindex: firstIndex + ( lastIndexNew - firstIndex ), // Increase index of what was inserted.\n\t\t\ttype: 'delete',\n\t\t\thowMany: lastIndexOld - firstIndex\n\t\t} );\n\t}\n\n\treturn result;\n}\n\n// Generates array with set `equal|insert|delete` operations based on change indexes from `findChangeBoundaryIndexes` function.\n//\n// @param {Object} changeIndexes Change indexes object from `findChangeBoundaryIndexes` function.\n// @param {Number} newLength Length of the new array on which `findChangeBoundaryIndexes` calculated change indexes.\n// @returns {Array.} Array of changes compatible with {@link module:utils/diff~diff} format.\nfunction changeIndexesToAtomicChanges( changeIndexes, newLength ) {\n\tconst { firstIndex, lastIndexOld, lastIndexNew } = changeIndexes;\n\n\t// No changes.\n\tif ( firstIndex === -1 ) {\n\t\treturn Array( newLength ).fill( 'equal' );\n\t}\n\n\tlet result = [];\n\tif ( firstIndex > 0 ) {\n\t\tresult = result.concat( Array( firstIndex ).fill( 'equal' ) );\n\t}\n\n\tif ( lastIndexNew - firstIndex > 0 ) {\n\t\tresult = result.concat( Array( lastIndexNew - firstIndex ).fill( 'insert' ) );\n\t}\n\n\tif ( lastIndexOld - firstIndex > 0 ) {\n\t\tresult = result.concat( Array( lastIndexOld - firstIndex ).fill( 'delete' ) );\n\t}\n\n\tif ( lastIndexNew < newLength ) {\n\t\tresult = result.concat( Array( newLength - lastIndexNew ).fill( 'equal' ) );\n\t}\n\n\treturn result;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/diff\n */\n\nimport fastDiff from '../src/fastdiff';\n\n// The following code is based on the \"O(NP) Sequence Comparison Algorithm\"\n// by Sun Wu, Udi Manber, Gene Myers, Webb Miller.\n\n/**\n * Calculates the difference between two arrays or strings producing an array containing a list of changes\n * necessary to transform input into output.\n *\n *\t\tdiff( 'aba', 'acca' ); // [ 'equal', 'insert', 'insert', 'delete', 'equal' ]\n *\n * This function is based on the \"O(NP) Sequence Comparison Algorithm\" by Sun Wu, Udi Manber, Gene Myers, Webb Miller.\n * Unfortunately, while it gives the most precise results, its to complex for longer strings/arrow (above 200 items).\n * Therefore, `diff()` automatically switches to {@link module:utils/fastdiff~fastDiff `fastDiff()`} when detecting\n * such a scenario. The return formats of both functions are identical.\n *\n * @param {Array|String} a Input array or string.\n * @param {Array|String} b Output array or string.\n * @param {Function} [cmp] Optional function used to compare array values, by default === is used.\n * @returns {Array} Array of changes.\n */\nexport default function diff( a, b, cmp ) {\n\t// Set the comparator function.\n\tcmp = cmp || function( a, b ) {\n\t\treturn a === b;\n\t};\n\n\tconst aLength = a.length;\n\tconst bLength = b.length;\n\n\t// Perform `fastDiff` for longer strings/arrays (see #269).\n\tif ( aLength > 200 || bLength > 200 || aLength + bLength > 300 ) {\n\t\treturn diff.fastDiff( a, b, cmp, true );\n\t}\n\n\t// Temporary action type statics.\n\tlet _insert, _delete;\n\n\t// Swapped the arrays to use the shorter one as the first one.\n\tif ( bLength < aLength ) {\n\t\tconst tmp = a;\n\n\t\ta = b;\n\t\tb = tmp;\n\n\t\t// We swap the action types as well.\n\t\t_insert = 'delete';\n\t\t_delete = 'insert';\n\t} else {\n\t\t_insert = 'insert';\n\t\t_delete = 'delete';\n\t}\n\n\tconst m = a.length;\n\tconst n = b.length;\n\tconst delta = n - m;\n\n\t// Edit scripts, for each diagonal.\n\tconst es = {};\n\t// Furthest points, the furthest y we can get on each diagonal.\n\tconst fp = {};\n\n\tfunction snake( k ) {\n\t\t// We use -1 as an alternative below to handle initial values ( instead of filling the fp with -1 first ).\n\t\t// Furthest points (y) on the diagonal below k.\n\t\tconst y1 = ( fp[ k - 1 ] !== undefined ? fp[ k - 1 ] : -1 ) + 1;\n\t\t// Furthest points (y) on the diagonal above k.\n\t\tconst y2 = fp[ k + 1 ] !== undefined ? fp[ k + 1 ] : -1;\n\t\t// The way we should go to get further.\n\t\tconst dir = y1 > y2 ? -1 : 1;\n\n\t\t// Clone previous changes array (if any).\n\t\tif ( es[ k + dir ] ) {\n\t\t\tes[ k ] = es[ k + dir ].slice( 0 );\n\t\t}\n\n\t\t// Create changes array.\n\t\tif ( !es[ k ] ) {\n\t\t\tes[ k ] = [];\n\t\t}\n\n\t\t// Push the action.\n\t\tes[ k ].push( y1 > y2 ? _insert : _delete );\n\n\t\t// Set the beginning coordinates.\n\t\tlet y = Math.max( y1, y2 );\n\t\tlet x = y - k;\n\n\t\t// Traverse the diagonal as long as the values match.\n\t\twhile ( x < m && y < n && cmp( a[ x ], b[ y ] ) ) {\n\t\t\tx++;\n\t\t\ty++;\n\t\t\t// Push no change action.\n\t\t\tes[ k ].push( 'equal' );\n\t\t}\n\n\t\treturn y;\n\t}\n\n\tlet p = 0;\n\tlet k;\n\n\t// Traverse the graph until we reach the end of the longer string.\n\tdo {\n\t\t// Updates furthest points and edit scripts for diagonals below delta.\n\t\tfor ( k = -p; k < delta; k++ ) {\n\t\t\tfp[ k ] = snake( k );\n\t\t}\n\n\t\t// Updates furthest points and edit scripts for diagonals above delta.\n\t\tfor ( k = delta + p; k > delta; k-- ) {\n\t\t\tfp[ k ] = snake( k );\n\t\t}\n\n\t\t// Updates furthest point and edit script for the delta diagonal.\n\t\t// note that the delta diagonal is the one which goes through the sink (m, n).\n\t\tfp[ delta ] = snake( delta );\n\n\t\tp++;\n\t} while ( fp[ delta ] !== n );\n\n\t// Return the final list of edit changes.\n\t// We remove the first item that represents the action for the injected nulls.\n\treturn es[ delta ].slice( 1 );\n}\n\n// Store the API in static property to easily overwrite it in tests.\n// Too bad dependency injection does not work in Webpack + ES 6 (const) + Babel.\ndiff.fastDiff = fastDiff;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/insertat\n */\n\n/**\n * Inserts node to the parent at given index.\n *\n * @param {Element} parentElement Parent element.\n * @param {Number} index Insertions index.\n * @param {Node} nodeToInsert Node to insert.\n */\nexport default function insertAt( parentElement, index, nodeToInsert ) {\n\tparentElement.insertBefore( nodeToInsert, parentElement.childNodes[ index ] || null );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/remove\n */\n\n/**\n * Removes given node from parent.\n *\n * @param {Node} node Node to remove.\n */\nexport default function remove( node ) {\n\tconst parent = node.parentNode;\n\n\tif ( parent ) {\n\t\tparent.removeChild( node );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/isnode\n */\n\n/**\n * Checks if the object is a native DOM Node.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isNode( obj ) {\n\tif ( obj ) {\n\t\tif ( obj.defaultView ) {\n\t\t\treturn obj instanceof obj.defaultView.Document;\n\t\t} else if ( obj.ownerDocument && obj.ownerDocument.defaultView ) {\n\t\t\treturn obj instanceof obj.ownerDocument.defaultView.Node;\n\t\t}\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals Node */\n\n/**\n * @module engine/view/renderer\n */\n\nimport ViewText from './text';\nimport ViewPosition from './position';\nimport { INLINE_FILLER, INLINE_FILLER_LENGTH, startsWithFiller, isInlineFiller } from './filler';\n\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport diff from '@ckeditor/ckeditor5-utils/src/diff';\nimport insertAt from '@ckeditor/ckeditor5-utils/src/dom/insertat';\nimport remove from '@ckeditor/ckeditor5-utils/src/dom/remove';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\nimport isNode from '@ckeditor/ckeditor5-utils/src/dom/isnode';\nimport fastDiff from '@ckeditor/ckeditor5-utils/src/fastdiff';\nimport env from '@ckeditor/ckeditor5-utils/src/env';\n\n/**\n * Renderer is responsible for updating the DOM structure and the DOM selection based on\n * the {@link module:engine/view/renderer~Renderer#markToSync information about updated view nodes}.\n * In other words, it renders the view to the DOM.\n *\n * Its main responsibility is to make only the necessary, minimal changes to the DOM. However, unlike in many\n * virtual DOM implementations, the primary reason for doing minimal changes is not the performance but ensuring\n * that native editing features such as text composition, autocompletion, spell checking, selection's x-index are\n * affected as little as possible.\n *\n * Renderer uses {@link module:engine/view/domconverter~DomConverter} to transform view nodes and positions\n * to and from the DOM.\n */\nexport default class Renderer {\n\t/**\n\t * Creates a renderer instance.\n\t *\n\t * @param {module:engine/view/domconverter~DomConverter} domConverter Converter instance.\n\t * @param {module:engine/view/documentselection~DocumentSelection} selection View selection.\n\t */\n\tconstructor( domConverter, selection ) {\n\t\t/**\n\t\t * Set of DOM Documents instances.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.}\n\t\t */\n\t\tthis.domDocuments = new Set();\n\n\t\t/**\n\t\t * Converter instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = domConverter;\n\n\t\t/**\n\t\t * Set of nodes which attributes changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.}\n\t\t */\n\t\tthis.markedAttributes = new Set();\n\n\t\t/**\n\t\t * Set of elements which child lists changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.}\n\t\t */\n\t\tthis.markedChildren = new Set();\n\n\t\t/**\n\t\t * Set of text nodes which text data changed and may need to be rendered.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Set.}\n\t\t */\n\t\tthis.markedTexts = new Set();\n\n\t\t/**\n\t\t * View selection. Renderer updates DOM selection based on the view selection.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection}\n\t\t */\n\t\tthis.selection = selection;\n\n\t\t/**\n\t\t * Indicates if the view document is focused and selection can be rendered. Selection will not be rendered if\n\t\t * this is set to `false`.\n\t\t *\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.isFocused = false;\n\n\t\t/**\n\t\t * The text node in which the inline filler was rendered.\n\t\t *\n\t\t * @private\n\t\t * @member {Text}\n\t\t */\n\t\tthis._inlineFiller = null;\n\n\t\t/**\n\t\t * DOM element containing fake selection.\n\t\t *\n\t\t * @private\n\t\t * @type {null|HTMLElement}\n\t\t */\n\t\tthis._fakeSelectionContainer = null;\n\t}\n\n\t/**\n\t * Marks a view node to be updated in the DOM by {@link #render `render()`}.\n\t *\n\t * Note that only view nodes whose parents have corresponding DOM elements need to be marked to be synchronized.\n\t *\n\t * @see #markedAttributes\n\t * @see #markedChildren\n\t * @see #markedTexts\n\t *\n\t * @param {module:engine/view/document~ChangeType} type Type of the change.\n\t * @param {module:engine/view/node~Node} node Node to be marked.\n\t */\n\tmarkToSync( type, node ) {\n\t\tif ( type === 'text' ) {\n\t\t\tif ( this.domConverter.mapViewToDom( node.parent ) ) {\n\t\t\t\tthis.markedTexts.add( node );\n\t\t\t}\n\t\t} else {\n\t\t\t// If the node has no DOM element it is not rendered yet,\n\t\t\t// its children/attributes do not need to be marked to be sync.\n\t\t\tif ( !this.domConverter.mapViewToDom( node ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif ( type === 'attributes' ) {\n\t\t\t\tthis.markedAttributes.add( node );\n\t\t\t} else if ( type === 'children' ) {\n\t\t\t\tthis.markedChildren.add( node );\n\t\t\t} else {\n\t\t\t\t/**\n\t\t\t\t * Unknown type passed to Renderer.markToSync.\n\t\t\t\t *\n\t\t\t\t * @error renderer-unknown-type\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'view-renderer-unknown-type: Unknown type passed to Renderer.markToSync.', this );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Renders all buffered changes ({@link #markedAttributes}, {@link #markedChildren} and {@link #markedTexts}) and\n\t * the current view selection (if needed) to the DOM by applying a minimal set of changes to it.\n\t *\n\t * Renderer tries not to break the text composition (e.g. IME) and x-index of the selection,\n\t * so it does as little as it is needed to update the DOM.\n\t *\n\t * Renderer also handles {@link module:engine/view/filler fillers}. Especially, it checks if the inline filler is needed\n\t * at the selection position and adds or removes it. To prevent breaking text composition inline filler will not be\n\t * removed as long as the selection is in the text node which needed it at first.\n\t */\n\trender() {\n\t\tlet inlineFillerPosition;\n\n\t\t// Refresh mappings.\n\t\tfor ( const element of this.markedChildren ) {\n\t\t\tthis._updateChildrenMappings( element );\n\t\t}\n\n\t\t// There was inline filler rendered in the DOM but it's not\n\t\t// at the selection position any more, so we can remove it\n\t\t// (cause even if it's needed, it must be placed in another location).\n\t\tif ( this._inlineFiller && !this._isSelectionInInlineFiller() ) {\n\t\t\tthis._removeInlineFiller();\n\t\t}\n\n\t\t// If we've got the filler, let's try to guess its position in the view.\n\t\tif ( this._inlineFiller ) {\n\t\t\tinlineFillerPosition = this._getInlineFillerPosition();\n\t\t}\n\t\t// Otherwise, if it's needed, create it at the selection position.\n\t\telse if ( this._needsInlineFillerAtSelection() ) {\n\t\t\tinlineFillerPosition = this.selection.getFirstPosition();\n\n\t\t\t// Do not use `markToSync` so it will be added even if the parent is already added.\n\t\t\tthis.markedChildren.add( inlineFillerPosition.parent );\n\t\t}\n\n\t\tfor ( const element of this.markedAttributes ) {\n\t\t\tthis._updateAttrs( element );\n\t\t}\n\n\t\tfor ( const element of this.markedChildren ) {\n\t\t\tthis._updateChildren( element, { inlineFillerPosition } );\n\t\t}\n\n\t\tfor ( const node of this.markedTexts ) {\n\t\t\tif ( !this.markedChildren.has( node.parent ) && this.domConverter.mapViewToDom( node.parent ) ) {\n\t\t\t\tthis._updateText( node, { inlineFillerPosition } );\n\t\t\t}\n\t\t}\n\n\t\t// Check whether the inline filler is required and where it really is in the DOM.\n\t\t// At this point in most cases it will be in the DOM, but there are exceptions.\n\t\t// For example, if the inline filler was deep in the created DOM structure, it will not be created.\n\t\t// Similarly, if it was removed at the beginning of this function and then neither text nor children were updated,\n\t\t// it will not be present.\n\t\t// Fix those and similar scenarios.\n\t\tif ( inlineFillerPosition ) {\n\t\t\tconst fillerDomPosition = this.domConverter.viewPositionToDom( inlineFillerPosition );\n\t\t\tconst domDocument = fillerDomPosition.parent.ownerDocument;\n\n\t\t\tif ( !startsWithFiller( fillerDomPosition.parent ) ) {\n\t\t\t\t// Filler has not been created at filler position. Create it now.\n\t\t\t\tthis._inlineFiller = addInlineFiller( domDocument, fillerDomPosition.parent, fillerDomPosition.offset );\n\t\t\t} else {\n\t\t\t\t// Filler has been found, save it.\n\t\t\t\tthis._inlineFiller = fillerDomPosition.parent;\n\t\t\t}\n\t\t} else {\n\t\t\t// There is no filler needed.\n\t\t\tthis._inlineFiller = null;\n\t\t}\n\n\t\tthis._updateSelection();\n\t\tthis._updateFocus();\n\n\t\tthis.markedTexts.clear();\n\t\tthis.markedAttributes.clear();\n\t\tthis.markedChildren.clear();\n\t}\n\n\t/**\n\t * Updates mappings of view element's children.\n\t *\n\t * Children that were replaced in the view structure by similar elements (same tag name) are treated as 'replaced'.\n\t * This means that their mappings can be updated so the new view elements are mapped to the existing DOM elements.\n\t * Thanks to that these elements do not need to be re-rendered completely.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewElement The view element whose children mappings will be updated.\n\t */\n\t_updateChildrenMappings( viewElement ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that it was already removed from DOM and there is no need to process it.\n\t\t\treturn;\n\t\t}\n\n\t\tconst actualDomChildren = this.domConverter.mapViewToDom( viewElement ).childNodes;\n\t\tconst expectedDomChildren = Array.from(\n\t\t\tthis.domConverter.viewChildrenToDom( viewElement, domElement.ownerDocument, { withChildren: false } )\n\t\t);\n\t\tconst diff = this._diffNodeLists( actualDomChildren, expectedDomChildren );\n\t\tconst actions = this._findReplaceActions( diff, actualDomChildren, expectedDomChildren );\n\n\t\tif ( actions.indexOf( 'replace' ) !== -1 ) {\n\t\t\tconst counter = { equal: 0, insert: 0, delete: 0 };\n\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action === 'replace' ) {\n\t\t\t\t\tconst insertIndex = counter.equal + counter.insert;\n\t\t\t\t\tconst deleteIndex = counter.equal + counter.delete;\n\t\t\t\t\tconst viewChild = viewElement.getChild( insertIndex );\n\n\t\t\t\t\t// The 'uiElement' is a special one and its children are not stored in a view (#799),\n\t\t\t\t\t// so we cannot use it with replacing flow (since it uses view children during rendering\n\t\t\t\t\t// which will always result in rendering empty element).\n\t\t\t\t\tif ( viewChild && !viewChild.is( 'uiElement' ) ) {\n\t\t\t\t\t\tthis._updateElementMappings( viewChild, actualDomChildren[ deleteIndex ] );\n\t\t\t\t\t}\n\n\t\t\t\t\tremove( expectedDomChildren[ insertIndex ] );\n\t\t\t\t\tcounter.equal++;\n\t\t\t\t} else {\n\t\t\t\t\tcounter[ action ]++;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Updates mappings of a given view element.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewElement The view element whose mappings will be updated.\n\t * @param {Node} domElement The DOM element representing the given view element.\n\t */\n\t_updateElementMappings( viewElement, domElement ) {\n\t\t// Remap 'DomConverter' bindings.\n\t\tthis.domConverter.unbindDomElement( domElement );\n\t\tthis.domConverter.bindElements( domElement, viewElement );\n\n\t\t// View element may have children which needs to be updated, but are not marked, mark them to update.\n\t\tthis.markedChildren.add( viewElement );\n\n\t\t// Because we replace new view element mapping with the existing one, the corresponding DOM element\n\t\t// will not be rerendered. The new view element may have different attributes than the previous one.\n\t\t// Since its corresponding DOM element will not be rerendered, new attributes will not be added\n\t\t// to the DOM, so we need to mark it here to make sure its attributes gets updated. See #1427 for more\n\t\t// detailed case study.\n\t\t// Also there are cases where replaced element is removed from the view structure and then has\n\t\t// its attributes changed or removed. In such cases the element will not be present in `markedAttributes`\n\t\t// and also may be the same (`element.isSimilar()`) as the reused element not having its attributes updated.\n\t\t// To prevent such situations we always mark reused element to have its attributes rerenderd (#1560).\n\t\tthis.markedAttributes.add( viewElement );\n\t}\n\n\t/**\n\t * Gets the position of the inline filler based on the current selection.\n\t * Here, we assume that we know that the filler is needed and\n\t * {@link #_isSelectionInInlineFiller is at the selection position}, and, since it is needed,\n\t * it is somewhere at the selection position.\n\t *\n\t * Note: The filler position cannot be restored based on the filler's DOM text node, because\n\t * when this method is called (before rendering), the bindings will often be broken. View-to-DOM\n\t * bindings are only dependable after rendering.\n\t *\n\t * @private\n\t * @returns {module:engine/view/position~Position}\n\t */\n\t_getInlineFillerPosition() {\n\t\tconst firstPos = this.selection.getFirstPosition();\n\n\t\tif ( firstPos.parent.is( 'text' ) ) {\n\t\t\treturn ViewPosition._createBefore( this.selection.getFirstPosition().parent );\n\t\t} else {\n\t\t\treturn firstPos;\n\t\t}\n\t}\n\n\t/**\n\t * Returns `true` if the selection has not left the inline filler's text node.\n\t * If it is `true`, it means that the filler had been added for a reason and the selection did not\n\t * leave the filler's text node. For example, the user can be in the middle of a composition so it should not be touched.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if the inline filler and selection are in the same place.\n\t */\n\t_isSelectionInInlineFiller() {\n\t\tif ( this.selection.rangeCount != 1 || !this.selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Note, we can't check if selection's position equals position of the\n\t\t// this._inlineFiller node, because of #663. We may not be able to calculate\n\t\t// the filler's position in the view at this stage.\n\t\t// Instead, we check it the other way – whether selection is anchored in\n\t\t// that text node or next to it.\n\n\t\t// Possible options are:\n\t\t// \"FILLER{}\"\n\t\t// \"FILLERadded-text{}\"\n\t\tconst selectionPosition = this.selection.getFirstPosition();\n\t\tconst position = this.domConverter.viewPositionToDom( selectionPosition );\n\n\t\tif ( position && isText( position.parent ) && startsWithFiller( position.parent ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn false;\n\t}\n\n\t/**\n\t * Removes the inline filler.\n\t *\n\t * @private\n\t */\n\t_removeInlineFiller() {\n\t\tconst domFillerNode = this._inlineFiller;\n\n\t\t// Something weird happened and the stored node doesn't contain the filler's text.\n\t\tif ( !startsWithFiller( domFillerNode ) ) {\n\t\t\t/**\n\t\t\t * The inline filler node was lost. Most likely, something overwrote the filler text node\n\t\t\t * in the DOM.\n\t\t\t *\n\t\t\t * @error view-renderer-filler-was-lost\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-renderer-filler-was-lost: The inline filler node was lost.', this );\n\t\t}\n\n\t\tif ( isInlineFiller( domFillerNode ) ) {\n\t\t\tdomFillerNode.parentNode.removeChild( domFillerNode );\n\t\t} else {\n\t\t\tdomFillerNode.data = domFillerNode.data.substr( INLINE_FILLER_LENGTH );\n\t\t}\n\n\t\tthis._inlineFiller = null;\n\t}\n\n\t/**\n\t * Checks if the inline {@link module:engine/view/filler filler} should be added.\n\t *\n\t * @private\n\t * @returns {Boolean} `true` if the inline filler should be added.\n\t */\n\t_needsInlineFillerAtSelection() {\n\t\tif ( this.selection.rangeCount != 1 || !this.selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst selectionPosition = this.selection.getFirstPosition();\n\t\tconst selectionParent = selectionPosition.parent;\n\t\tconst selectionOffset = selectionPosition.offset;\n\n\t\t// If there is no DOM root we do not care about fillers.\n\t\tif ( !this.domConverter.mapViewToDom( selectionParent.root ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( !( selectionParent.is( 'element' ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Prevent adding inline filler inside elements with contenteditable=false.\n\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/1170\n\t\tif ( !isEditable( selectionParent ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// We have block filler, we do not need inline one.\n\t\tif ( selectionOffset === selectionParent.getFillerOffset() ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst nodeBefore = selectionPosition.nodeBefore;\n\t\tconst nodeAfter = selectionPosition.nodeAfter;\n\n\t\tif ( nodeBefore instanceof ViewText || nodeAfter instanceof ViewText ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks if text needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} viewText View text to update.\n\t * @param {Object} options\n\t * @param {module:engine/view/position~Position} options.inlineFillerPosition The position where the inline\n\t * filler should be rendered.\n\t */\n\t_updateText( viewText, options ) {\n\t\tconst domText = this.domConverter.findCorrespondingDomText( viewText );\n\t\tconst newDomText = this.domConverter.viewToDom( viewText, domText.ownerDocument );\n\n\t\tconst actualText = domText.data;\n\t\tlet expectedText = newDomText.data;\n\n\t\tconst filler = options.inlineFillerPosition;\n\n\t\tif ( filler && filler.parent == viewText.parent && filler.offset == viewText.index ) {\n\t\t\texpectedText = INLINE_FILLER + expectedText;\n\t\t}\n\n\t\tif ( actualText != expectedText ) {\n\t\t\tconst actions = fastDiff( actualText, expectedText );\n\n\t\t\tfor ( const action of actions ) {\n\t\t\t\tif ( action.type === 'insert' ) {\n\t\t\t\t\tdomText.insertData( action.index, action.values.join( '' ) );\n\t\t\t\t} else { // 'delete'\n\t\t\t\t\tdomText.deleteData( action.index, action.howMany );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if attribute list needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewElement The view element to update.\n\t */\n\t_updateAttrs( viewElement ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that 'viewElement' is outdated as its mapping was updated\n\t\t\t// in 'this._updateChildrenMappings()'. There is no need to process it as new view element which\n\t\t\t// replaced old 'viewElement' mapping was also added to 'this.markedAttributes'\n\t\t\t// in 'this._updateChildrenMappings()' so it will be processed separately.\n\t\t\treturn;\n\t\t}\n\n\t\tconst domAttrKeys = Array.from( domElement.attributes ).map( attr => attr.name );\n\t\tconst viewAttrKeys = viewElement.getAttributeKeys();\n\n\t\t// Add or overwrite attributes.\n\t\tfor ( const key of viewAttrKeys ) {\n\t\t\tdomElement.setAttribute( key, viewElement.getAttribute( key ) );\n\t\t}\n\n\t\t// Remove from DOM attributes which do not exists in the view.\n\t\tfor ( const key of domAttrKeys ) {\n\t\t\tif ( !viewElement.hasAttribute( key ) ) {\n\t\t\t\tdomElement.removeAttribute( key );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if elements child list needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t * @param {module:engine/view/element~Element} viewElement View element to update.\n\t * @param {Object} options\n\t * @param {module:engine/view/position~Position} options.inlineFillerPosition The position where the inline\n\t * filler should be rendered.\n\t */\n\t_updateChildren( viewElement, options ) {\n\t\tconst domElement = this.domConverter.mapViewToDom( viewElement );\n\n\t\tif ( !domElement ) {\n\t\t\t// If there is no `domElement` it means that it was already removed from DOM.\n\t\t\t// There is no need to process it. It will be processed when re-inserted.\n\t\t\treturn;\n\t\t}\n\n\t\tconst inlineFillerPosition = options.inlineFillerPosition;\n\t\tconst actualDomChildren = this.domConverter.mapViewToDom( viewElement ).childNodes;\n\t\tconst expectedDomChildren = Array.from(\n\t\t\tthis.domConverter.viewChildrenToDom( viewElement, domElement.ownerDocument, { bind: true, inlineFillerPosition } )\n\t\t);\n\n\t\t// Inline filler element has to be created as it is present in the DOM, but not in the view. It is required\n\t\t// during diffing so text nodes could be compared correctly and also during rendering to maintain\n\t\t// proper order and indexes while updating the DOM.\n\t\tif ( inlineFillerPosition && inlineFillerPosition.parent === viewElement ) {\n\t\t\taddInlineFiller( domElement.ownerDocument, expectedDomChildren, inlineFillerPosition.offset );\n\t\t}\n\n\t\tconst diff = this._diffNodeLists( actualDomChildren, expectedDomChildren );\n\n\t\tlet i = 0;\n\t\tconst nodesToUnbind = new Set();\n\n\t\tfor ( const action of diff ) {\n\t\t\tif ( action === 'insert' ) {\n\t\t\t\tinsertAt( domElement, i, expectedDomChildren[ i ] );\n\t\t\t\ti++;\n\t\t\t} else if ( action === 'delete' ) {\n\t\t\t\tnodesToUnbind.add( actualDomChildren[ i ] );\n\t\t\t\tremove( actualDomChildren[ i ] );\n\t\t\t} else { // 'equal'\n\t\t\t\t// Force updating text nodes inside elements which did not change and do not need to be re-rendered (#1125).\n\t\t\t\tthis._markDescendantTextToSync( this.domConverter.domToView( expectedDomChildren[ i ] ) );\n\t\t\t\ti++;\n\t\t\t}\n\t\t}\n\n\t\t// Unbind removed nodes. When node does not have a parent it means that it was removed from DOM tree during\n\t\t// comparision with the expected DOM. We don't need to check child nodes, because if child node was reinserted,\n\t\t// it was moved to DOM tree out of the removed node.\n\t\tfor ( const node of nodesToUnbind ) {\n\t\t\tif ( !node.parentNode ) {\n\t\t\t\tthis.domConverter.unbindDomElement( node );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Shorthand for diffing two arrays or node lists of DOM nodes.\n\t *\n\t * @private\n\t * @param {Array.|NodeList} actualDomChildren Actual DOM children\n\t * @param {Array.|NodeList} expectedDomChildren Expected DOM children.\n\t * @returns {Array.} The list of actions based on the {@link module:utils/diff~diff} function.\n\t */\n\t_diffNodeLists( actualDomChildren, expectedDomChildren ) {\n\t\tactualDomChildren = filterOutFakeSelectionContainer( actualDomChildren, this._fakeSelectionContainer );\n\n\t\treturn diff( actualDomChildren, expectedDomChildren, sameNodes.bind( null, this.domConverter ) );\n\t}\n\n\t/**\n\t * Finds DOM nodes that were replaced with the similar nodes (same tag name) in the view. All nodes are compared\n\t * within one `insert`/`delete` action group, for example:\n\t *\n\t * \t\tActual DOM:\t\t

FooBarBazBax

\n\t * \t\tExpected DOM:\t

Bar123Baz456

\n\t * \t\tInput actions:\t[ insert, insert, delete, delete, equal, insert, delete ]\n\t * \t\tOutput actions:\t[ insert, replace, delete, equal, replace ]\n\t *\n\t * @private\n\t * @param {Array.} actions Actions array which is a result of the {@link module:utils/diff~diff} function.\n\t * @param {Array.|NodeList} actualDom Actual DOM children\n\t * @param {Array.} expectedDom Expected DOM children.\n\t * @returns {Array.} Actions array modified with the `replace` actions.\n\t */\n\t_findReplaceActions( actions, actualDom, expectedDom ) {\n\t\t// If there is no both 'insert' and 'delete' actions, no need to check for replaced elements.\n\t\tif ( actions.indexOf( 'insert' ) === -1 || actions.indexOf( 'delete' ) === -1 ) {\n\t\t\treturn actions;\n\t\t}\n\n\t\tlet newActions = [];\n\t\tlet actualSlice = [];\n\t\tlet expectedSlice = [];\n\n\t\tconst counter = { equal: 0, insert: 0, delete: 0 };\n\n\t\tfor ( const action of actions ) {\n\t\t\tif ( action === 'insert' ) {\n\t\t\t\texpectedSlice.push( expectedDom[ counter.equal + counter.insert ] );\n\t\t\t} else if ( action === 'delete' ) {\n\t\t\t\tactualSlice.push( actualDom[ counter.equal + counter.delete ] );\n\t\t\t} else { // equal\n\t\t\t\tnewActions = newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );\n\t\t\t\tnewActions.push( 'equal' );\n\t\t\t\t// Reset stored elements on 'equal'.\n\t\t\t\tactualSlice = [];\n\t\t\t\texpectedSlice = [];\n\t\t\t}\n\t\t\tcounter[ action ]++;\n\t\t}\n\n\t\treturn newActions.concat( diff( actualSlice, expectedSlice, areSimilar ).map( x => x === 'equal' ? 'replace' : x ) );\n\t}\n\n\t/**\n\t * Marks text nodes to be synchronized.\n\t *\n\t * If a text node is passed, it will be marked. If an element is passed, all descendant text nodes inside it will be marked.\n\t *\n\t * @private\n\t * @param {module:engine/view/node~Node} viewNode View node to sync.\n\t */\n\t_markDescendantTextToSync( viewNode ) {\n\t\tif ( !viewNode ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( viewNode.is( 'text' ) ) {\n\t\t\tthis.markedTexts.add( viewNode );\n\t\t} else if ( viewNode.is( 'element' ) ) {\n\t\t\tfor ( const child of viewNode.getChildren() ) {\n\t\t\t\tthis._markDescendantTextToSync( child );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Checks if the selection needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t */\n\t_updateSelection() {\n\t\t// If there is no selection - remove DOM and fake selections.\n\t\tif ( this.selection.rangeCount === 0 ) {\n\t\t\tthis._removeDomSelection();\n\t\t\tthis._removeFakeSelection();\n\n\t\t\treturn;\n\t\t}\n\n\t\tconst domRoot = this.domConverter.mapViewToDom( this.selection.editableElement );\n\n\t\t// Do nothing if there is no focus, or there is no DOM element corresponding to selection's editable element.\n\t\tif ( !this.isFocused || !domRoot ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Render selection.\n\t\tif ( this.selection.isFake ) {\n\t\t\tthis._updateFakeSelection( domRoot );\n\t\t} else {\n\t\t\tthis._removeFakeSelection();\n\t\t\tthis._updateDomSelection( domRoot );\n\t\t}\n\t}\n\n\t/**\n\t * Updates the fake selection.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where the fake selection container should be added.\n\t */\n\t_updateFakeSelection( domRoot ) {\n\t\tconst domDocument = domRoot.ownerDocument;\n\n\t\tif ( !this._fakeSelectionContainer ) {\n\t\t\tthis._fakeSelectionContainer = createFakeSelectionContainer( domDocument );\n\t\t}\n\n\t\tconst container = this._fakeSelectionContainer;\n\n\t\t// Bind fake selection container with the current selection *position*.\n\t\tthis.domConverter.bindFakeSelection( container, this.selection );\n\n\t\tif ( !this._fakeSelectionNeedsUpdate( domRoot ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !container.parentElement || container.parentElement != domRoot ) {\n\t\t\tdomRoot.appendChild( container );\n\t\t}\n\n\t\tcontainer.textContent = this.selection.fakeSelectionLabel || '\\u00A0';\n\n\t\tconst domSelection = domDocument.getSelection();\n\t\tconst domRange = domDocument.createRange();\n\n\t\tdomSelection.removeAllRanges();\n\t\tdomRange.selectNodeContents( container );\n\t\tdomSelection.addRange( domRange );\n\t}\n\n\t/**\n\t * Updates the DOM selection.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where the DOM selection should be rendered.\n\t */\n\t_updateDomSelection( domRoot ) {\n\t\tconst domSelection = domRoot.ownerDocument.defaultView.getSelection();\n\n\t\t// Let's check whether DOM selection needs updating at all.\n\t\tif ( !this._domSelectionNeedsUpdate( domSelection ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Multi-range selection is not available in most browsers, and, at least in Chrome, trying to\n\t\t// set such selection, that is not continuous, throws an error. Because of that, we will just use anchor\n\t\t// and focus of view selection.\n\t\t// Since we are not supporting multi-range selection, we also do not need to check if proper editable is\n\t\t// selected. If there is any editable selected, it is okay (editable is taken from selection anchor).\n\t\tconst anchor = this.domConverter.viewPositionToDom( this.selection.anchor );\n\t\tconst focus = this.domConverter.viewPositionToDom( this.selection.focus );\n\n\t\t// Focus the new editing host.\n\t\t// Otherwise, FF may throw an error (https://github.com/ckeditor/ckeditor5/issues/721).\n\t\tdomRoot.focus();\n\n\t\tdomSelection.collapse( anchor.parent, anchor.offset );\n\t\tdomSelection.extend( focus.parent, focus.offset );\n\n\t\t// Firefox–specific hack (https://github.com/ckeditor/ckeditor5-engine/issues/1439).\n\t\tif ( env.isGecko ) {\n\t\t\tfixGeckoSelectionAfterBr( focus, domSelection );\n\t\t}\n\t}\n\n\t/**\n\t * Checks whether a given DOM selection needs to be updated.\n\t *\n\t * @private\n\t * @param {Selection} domSelection The DOM selection to check.\n\t * @returns {Boolean}\n\t */\n\t_domSelectionNeedsUpdate( domSelection ) {\n\t\tif ( !this.domConverter.isDomSelectionCorrect( domSelection ) ) {\n\t\t\t// Current DOM selection is in incorrect position. We need to update it.\n\t\t\treturn true;\n\t\t}\n\n\t\tconst oldViewSelection = domSelection && this.domConverter.domSelectionToView( domSelection );\n\n\t\tif ( oldViewSelection && this.selection.isEqual( oldViewSelection ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If selection is not collapsed, it does not need to be updated if it is similar.\n\t\tif ( !this.selection.isCollapsed && this.selection.isSimilar( oldViewSelection ) ) {\n\t\t\t// Selection did not changed and is correct, do not update.\n\t\t\treturn false;\n\t\t}\n\n\t\t// Selections are not similar.\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether the fake selection needs to be updated.\n\t *\n\t * @private\n\t * @param {HTMLElement} domRoot A valid DOM root where a new fake selection container should be added.\n\t * @returns {Boolean}\n\t */\n\t_fakeSelectionNeedsUpdate( domRoot ) {\n\t\tconst container = this._fakeSelectionContainer;\n\t\tconst domSelection = domRoot.ownerDocument.getSelection();\n\n\t\t// Fake selection needs to be updated if there's no fake selection container, or the container currently sits\n\t\t// in a different root.\n\t\tif ( !container || container.parentElement !== domRoot ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Make sure that the selection actually is within the fake selection.\n\t\tif ( domSelection.anchorNode !== container && !container.contains( domSelection.anchorNode ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn container.textContent !== this.selection.fakeSelectionLabel;\n\t}\n\n\t/**\n\t * Removes the DOM selection.\n\t *\n\t * @private\n\t */\n\t_removeDomSelection() {\n\t\tfor ( const doc of this.domDocuments ) {\n\t\t\tconst domSelection = doc.getSelection();\n\n\t\t\tif ( domSelection.rangeCount ) {\n\t\t\t\tconst activeDomElement = doc.activeElement;\n\t\t\t\tconst viewElement = this.domConverter.mapDomToView( activeDomElement );\n\n\t\t\t\tif ( activeDomElement && viewElement ) {\n\t\t\t\t\tdoc.getSelection().removeAllRanges();\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Removes the fake selection.\n\t *\n\t * @private\n\t */\n\t_removeFakeSelection() {\n\t\tconst container = this._fakeSelectionContainer;\n\n\t\tif ( container ) {\n\t\t\tcontainer.remove();\n\t\t}\n\t}\n\n\t/**\n\t * Checks if focus needs to be updated and possibly updates it.\n\t *\n\t * @private\n\t */\n\t_updateFocus() {\n\t\tif ( this.isFocused ) {\n\t\t\tconst editable = this.selection.editableElement;\n\n\t\t\tif ( editable ) {\n\t\t\t\tthis.domConverter.focus( editable );\n\t\t\t}\n\t\t}\n\t}\n}\n\nmix( Renderer, ObservableMixin );\n\n// Checks if provided element is editable.\n//\n// @private\n// @param {module:engine/view/element~Element} element\n// @returns {Boolean}\nfunction isEditable( element ) {\n\tif ( element.getAttribute( 'contenteditable' ) == 'false' ) {\n\t\treturn false;\n\t}\n\n\tconst parent = element.findAncestor( element => element.hasAttribute( 'contenteditable' ) );\n\n\treturn !parent || parent.getAttribute( 'contenteditable' ) == 'true';\n}\n\n// Adds inline filler at a given position.\n//\n// The position can be given as an array of DOM nodes and an offset in that array,\n// or a DOM parent element and an offset in that element.\n//\n// @private\n// @param {Document} domDocument\n// @param {Element|Array.} domParentOrArray\n// @param {Number} offset\n// @returns {Text} The DOM text node that contains an inline filler.\nfunction addInlineFiller( domDocument, domParentOrArray, offset ) {\n\tconst childNodes = domParentOrArray instanceof Array ? domParentOrArray : domParentOrArray.childNodes;\n\tconst nodeAfterFiller = childNodes[ offset ];\n\n\tif ( isText( nodeAfterFiller ) ) {\n\t\tnodeAfterFiller.data = INLINE_FILLER + nodeAfterFiller.data;\n\n\t\treturn nodeAfterFiller;\n\t} else {\n\t\tconst fillerNode = domDocument.createTextNode( INLINE_FILLER );\n\n\t\tif ( Array.isArray( domParentOrArray ) ) {\n\t\t\tchildNodes.splice( offset, 0, fillerNode );\n\t\t} else {\n\t\t\tinsertAt( domParentOrArray, offset, fillerNode );\n\t\t}\n\n\t\treturn fillerNode;\n\t}\n}\n\n// Whether two DOM nodes should be considered as similar.\n// Nodes are considered similar if they have the same tag name.\n//\n// @private\n// @param {Node} node1\n// @param {Node} node2\n// @returns {Boolean}\nfunction areSimilar( node1, node2 ) {\n\treturn isNode( node1 ) && isNode( node2 ) &&\n\t\t!isText( node1 ) && !isText( node2 ) &&\n\t\tnode1.tagName.toLowerCase() === node2.tagName.toLowerCase();\n}\n\n// Whether two dom nodes should be considered as the same.\n// Two nodes which are considered the same are:\n//\n//\t\t* Text nodes with the same text.\n//\t\t* Element nodes represented by the same object.\n//\t\t* Two block filler elements.\n//\n// @private\n// @param {String} blockFillerMode Block filler mode, see {@link module:engine/view/domconverter~DomConverter#blockFillerMode}.\n// @param {Node} node1\n// @param {Node} node2\n// @returns {Boolean}\nfunction sameNodes( domConverter, actualDomChild, expectedDomChild ) {\n\t// Elements.\n\tif ( actualDomChild === expectedDomChild ) {\n\t\treturn true;\n\t}\n\t// Texts.\n\telse if ( isText( actualDomChild ) && isText( expectedDomChild ) ) {\n\t\treturn actualDomChild.data === expectedDomChild.data;\n\t}\n\t// Block fillers.\n\telse if ( domConverter.isBlockFiller( actualDomChild ) &&\n\t\tdomConverter.isBlockFiller( expectedDomChild ) ) {\n\t\treturn true;\n\t}\n\n\t// Not matching types.\n\treturn false;\n}\n\n// The following is a Firefox–specific hack (https://github.com/ckeditor/ckeditor5-engine/issues/1439).\n// When the native DOM selection is at the end of the block and preceded by
e.g.\n//\n//\t\t

foo
[]

\n//\n// which happens a lot when using the soft line break, the browser fails to (visually) move the\n// caret to the new line. A quick fix is as simple as force–refreshing the selection with the same range.\nfunction fixGeckoSelectionAfterBr( focus, domSelection ) {\n\tconst parent = focus.parent;\n\n\t// This fix works only when the focus point is at the very end of an element.\n\t// There is no point in running it in cases unrelated to the browser bug.\n\tif ( parent.nodeType != Node.ELEMENT_NODE || focus.offset != parent.childNodes.length - 1 ) {\n\t\treturn;\n\t}\n\n\tconst childAtOffset = parent.childNodes[ focus.offset ];\n\n\t// To stay on the safe side, the fix being as specific as possible, it targets only the\n\t// selection which is at the very end of the element and preceded by
.\n\tif ( childAtOffset && childAtOffset.tagName == 'BR' ) {\n\t\tdomSelection.addRange( domSelection.getRangeAt( 0 ) );\n\t}\n}\n\nfunction filterOutFakeSelectionContainer( domChildList, fakeSelectionContainer ) {\n\tconst childList = Array.from( domChildList );\n\n\tif ( childList.length == 0 || !fakeSelectionContainer ) {\n\t\treturn childList;\n\t}\n\n\tconst last = childList[ childList.length - 1 ];\n\n\tif ( last == fakeSelectionContainer ) {\n\t\tchildList.pop();\n\t}\n\n\treturn childList;\n}\n\n// Creates a fake selection container for a given document.\n//\n// @private\n// @param {Document} domDocument\n// @returns {HTMLElement}\nfunction createFakeSelectionContainer( domDocument ) {\n\tconst container = domDocument.createElement( 'div' );\n\n\tObject.assign( container.style, {\n\t\tposition: 'fixed',\n\t\ttop: 0,\n\t\tleft: '-9999px',\n\t\t// See https://github.com/ckeditor/ckeditor5/issues/752.\n\t\twidth: '42px'\n\t} );\n\n\t// Fill it with a text node so we can update it later.\n\tcontainer.textContent = '\\u00A0';\n\n\treturn container;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals window, document */\n\n/**\n * @module utils/dom/global\n */\n\n/**\n * A helper (module) giving an access to the global DOM objects such as `window` and\n * `document`. Accessing these objects using this helper allows easy and bulletproof\n * testing, i.e. stubbing native properties:\n *\n *\t\timport global from 'ckeditor5/utils/dom/global.js';\n *\n *\t\t// This stub will work for any code using global module.\n *\t\ttestUtils.sinon.stub( global, 'window', {\n *\t\t\tinnerWidth: 10000\n *\t\t} );\n *\n *\t\tconsole.log( global.window.innerWidth );\n */\nexport default { window, document };\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/indexof\n */\n\n/**\n * Returns index of the node in the parent element.\n *\n * @param {Node} node Node which index is tested.\n * @returns {Number} Index of the node in the parent element. Returns 0 if node has no parent.\n */\nexport default function indexOf( node ) {\n\tlet index = 0;\n\n\twhile ( node.previousSibling ) {\n\t\tnode = node.previousSibling;\n\t\tindex++;\n\t}\n\n\treturn index;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/* globals Node */\n\n/**\n * @module utils/dom/getancestors\n */\n\n/**\n * Returns all ancestors of given DOM node, starting from the top-most (root). Includes the given node itself. If the\n * node is a part of `DocumentFragment` that `DocumentFragment` will be returned. In contrary, if the node is\n * appended to a `Document`, that `Document` will not be returned (algorithms operating on DOM tree care for `Document#documentElement`\n * at most, which will be returned).\n *\n * @param {Node} node DOM node.\n * @returns {Array.} Array of given `node` parents.\n */\nexport default function getAncestors( node ) {\n\tconst nodes = [];\n\n\t// We are interested in `Node`s `DocumentFragment`s only.\n\twhile ( node && node.nodeType != Node.DOCUMENT_NODE ) {\n\t\tnodes.unshift( node );\n\t\tnode = node.parentNode;\n\t}\n\n\treturn nodes;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/domconverter\n */\n\n/* globals document, Node, NodeFilter, Text */\n\nimport ViewText from './text';\nimport ViewElement from './element';\nimport ViewPosition from './position';\nimport ViewRange from './range';\nimport ViewSelection from './selection';\nimport ViewDocumentFragment from './documentfragment';\nimport ViewTreeWalker from './treewalker';\nimport { BR_FILLER, getDataWithoutFiller, INLINE_FILLER_LENGTH, isInlineFiller, NBSP_FILLER, startsWithFiller } from './filler';\n\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport indexOf from '@ckeditor/ckeditor5-utils/src/dom/indexof';\nimport getAncestors from '@ckeditor/ckeditor5-utils/src/dom/getancestors';\nimport getCommonAncestor from '@ckeditor/ckeditor5-utils/src/dom/getcommonancestor';\nimport isText from '@ckeditor/ckeditor5-utils/src/dom/istext';\nimport { isElement } from 'lodash-es';\n\n// eslint-disable-next-line new-cap\nconst BR_FILLER_REF = BR_FILLER( document );\n\n/**\n * DomConverter is a set of tools to do transformations between DOM nodes and view nodes. It also handles\n * {@link module:engine/view/domconverter~DomConverter#bindElements binding} these nodes.\n *\n * The instance of DOMConverter is available in {@link module:engine/view/view~View#domConverter `editor.editing.view.domConverter`}.\n *\n * DomConverter does not check which nodes should be rendered (use {@link module:engine/view/renderer~Renderer}), does not keep a\n * state of a tree nor keeps synchronization between tree view and DOM tree (use {@link module:engine/view/document~Document}).\n *\n * DomConverter keeps DOM elements to View element bindings, so when the converter will be destroyed, the binding will\n * be lost. Two converters will keep separate binding maps, so one tree view can be bound with two DOM trees.\n */\nexport default class DomConverter {\n\t/**\n\t * Creates DOM converter.\n\t *\n\t * @param {Object} options Object with configuration options.\n\t * @param {module:engine/view/filler~BlockFillerMode} [options.blockFillerMode='br'] The type of the block filler to use.\n\t */\n\tconstructor( options = {} ) {\n\t\t/**\n\t\t * The mode of a block filler used by DOM converter.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'br'|'nbsp'} module:engine/view/domconverter~DomConverter#blockFillerMode\n\t\t */\n\t\tthis.blockFillerMode = options.blockFillerMode || 'br';\n\n\t\t/**\n\t\t * Elements which are considered pre-formatted elements.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.} module:engine/view/domconverter~DomConverter#preElements\n\t\t */\n\t\tthis.preElements = [ 'pre' ];\n\n\t\t/**\n\t\t * Elements which are considered block elements (and hence should be filled with a\n\t\t * {@link #isBlockFiller block filler}).\n\t\t *\n\t\t * Whether an element is considered a block element also affects handling of trailing whitespaces.\n\t\t *\n\t\t * You can extend this array if you introduce support for block elements which are not yet recognized here.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.} module:engine/view/domconverter~DomConverter#blockElements\n\t\t */\n\t\tthis.blockElements = [ 'p', 'div', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'li', 'dd', 'dt', 'figcaption' ];\n\n\t\t/**\n\t\t * Block {@link module:engine/view/filler filler} creator, which is used to create all block fillers during the\n\t\t * view to DOM conversion and to recognize block fillers during the DOM to view conversion.\n\t\t *\n\t\t * @readonly\n\t\t * @private\n\t\t * @member {Function} module:engine/view/domconverter~DomConverter#_blockFiller\n\t\t */\n\t\tthis._blockFiller = this.blockFillerMode == 'br' ? BR_FILLER : NBSP_FILLER;\n\n\t\t/**\n\t\t * DOM to View mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_domToViewMapping\n\t\t */\n\t\tthis._domToViewMapping = new WeakMap();\n\n\t\t/**\n\t\t * View to DOM mapping.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_viewToDomMapping\n\t\t */\n\t\tthis._viewToDomMapping = new WeakMap();\n\n\t\t/**\n\t\t * Holds mapping between fake selection containers and corresponding view selections.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakMap} module:engine/view/domconverter~DomConverter#_fakeSelectionMapping\n\t\t */\n\t\tthis._fakeSelectionMapping = new WeakMap();\n\t}\n\n\t/**\n\t * Binds given DOM element that represents fake selection to a **position** of a\n\t * {@link module:engine/view/documentselection~DocumentSelection document selection}.\n\t * Document selection copy is stored and can be retrieved by\n\t * {@link module:engine/view/domconverter~DomConverter#fakeSelectionToView} method.\n\t *\n\t * @param {HTMLElement} domElement\n\t * @param {module:engine/view/documentselection~DocumentSelection} viewDocumentSelection\n\t */\n\tbindFakeSelection( domElement, viewDocumentSelection ) {\n\t\tthis._fakeSelectionMapping.set( domElement, new ViewSelection( viewDocumentSelection ) );\n\t}\n\n\t/**\n\t * Returns {@link module:engine/view/selection~Selection view selection} instance corresponding to\n\t * given DOM element that represents fake selection. Returns `undefined` if binding to given DOM element does not exists.\n\t *\n\t * @param {HTMLElement} domElement\n\t * @returns {module:engine/view/selection~Selection|undefined}\n\t */\n\tfakeSelectionToView( domElement ) {\n\t\treturn this._fakeSelectionMapping.get( domElement );\n\t}\n\n\t/**\n\t * Binds DOM and View elements, so it will be possible to get corresponding elements using\n\t * {@link module:engine/view/domconverter~DomConverter#mapDomToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#mapViewToDom}.\n\t *\n\t * @param {HTMLElement} domElement DOM element to bind.\n\t * @param {module:engine/view/element~Element} viewElement View element to bind.\n\t */\n\tbindElements( domElement, viewElement ) {\n\t\tthis._domToViewMapping.set( domElement, viewElement );\n\t\tthis._viewToDomMapping.set( viewElement, domElement );\n\t}\n\n\t/**\n\t * Unbinds given `domElement` from the view element it was bound to. Unbinding is deep, meaning that all children of\n\t * `domElement` will be unbound too.\n\t *\n\t * @param {HTMLElement} domElement DOM element to unbind.\n\t */\n\tunbindDomElement( domElement ) {\n\t\tconst viewElement = this._domToViewMapping.get( domElement );\n\n\t\tif ( viewElement ) {\n\t\t\tthis._domToViewMapping.delete( domElement );\n\t\t\tthis._viewToDomMapping.delete( viewElement );\n\n\t\t\t// Use Array.from because of MS Edge (#923).\n\t\t\tfor ( const child of Array.from( domElement.childNodes ) ) {\n\t\t\t\tthis.unbindDomElement( child );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Binds DOM and View document fragments, so it will be possible to get corresponding document fragments using\n\t * {@link module:engine/view/domconverter~DomConverter#mapDomToView} and\n\t * {@link module:engine/view/domconverter~DomConverter#mapViewToDom}.\n\t *\n\t * @param {DocumentFragment} domFragment DOM document fragment to bind.\n\t * @param {module:engine/view/documentfragment~DocumentFragment} viewFragment View document fragment to bind.\n\t */\n\tbindDocumentFragments( domFragment, viewFragment ) {\n\t\tthis._domToViewMapping.set( domFragment, viewFragment );\n\t\tthis._viewToDomMapping.set( viewFragment, domFragment );\n\t}\n\n\t/**\n\t * Converts view to DOM. For all text nodes, not bound elements and document fragments new items will\n\t * be created. For bound elements and document fragments function will return corresponding items.\n\t *\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} viewNode\n\t * View node or document fragment to transform.\n\t * @param {Document} domDocument Document which will be used to create DOM nodes.\n\t * @param {Object} [options] Conversion options.\n\t * @param {Boolean} [options.bind=false] Determines whether new elements will be bound.\n\t * @param {Boolean} [options.withChildren=true] If `true`, node's and document fragment's children will be converted too.\n\t * @returns {Node|DocumentFragment} Converted node or DocumentFragment.\n\t */\n\tviewToDom( viewNode, domDocument, options = {} ) {\n\t\tif ( viewNode.is( 'text' ) ) {\n\t\t\tconst textData = this._processDataFromViewText( viewNode );\n\n\t\t\treturn domDocument.createTextNode( textData );\n\t\t} else {\n\t\t\tif ( this.mapViewToDom( viewNode ) ) {\n\t\t\t\treturn this.mapViewToDom( viewNode );\n\t\t\t}\n\n\t\t\tlet domElement;\n\n\t\t\tif ( viewNode.is( 'documentFragment' ) ) {\n\t\t\t\t// Create DOM document fragment.\n\t\t\t\tdomElement = domDocument.createDocumentFragment();\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindDocumentFragments( domElement, viewNode );\n\t\t\t\t}\n\t\t\t} else if ( viewNode.is( 'uiElement' ) ) {\n\t\t\t\t// UIElement has its own render() method (see #799).\n\t\t\t\tdomElement = viewNode.render( domDocument );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domElement, viewNode );\n\t\t\t\t}\n\n\t\t\t\treturn domElement;\n\t\t\t} else {\n\t\t\t\t// Create DOM element.\n\t\t\t\tif ( viewNode.hasAttribute( 'xmlns' ) ) {\n\t\t\t\t\tdomElement = domDocument.createElementNS( viewNode.getAttribute( 'xmlns' ), viewNode.name );\n\t\t\t\t} else {\n\t\t\t\t\tdomElement = domDocument.createElement( viewNode.name );\n\t\t\t\t}\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domElement, viewNode );\n\t\t\t\t}\n\n\t\t\t\t// Copy element's attributes.\n\t\t\t\tfor ( const key of viewNode.getAttributeKeys() ) {\n\t\t\t\t\tdomElement.setAttribute( key, viewNode.getAttribute( key ) );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( options.withChildren || options.withChildren === undefined ) {\n\t\t\t\tfor ( const child of this.viewChildrenToDom( viewNode, domDocument, options ) ) {\n\t\t\t\t\tdomElement.appendChild( child );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn domElement;\n\t\t}\n\t}\n\n\t/**\n\t * Converts children of the view element to DOM using the\n\t * {@link module:engine/view/domconverter~DomConverter#viewToDom} method.\n\t * Additionally, this method adds block {@link module:engine/view/filler filler} to the list of children, if needed.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewElement Parent view element.\n\t * @param {Document} domDocument Document which will be used to create DOM nodes.\n\t * @param {Object} options See {@link module:engine/view/domconverter~DomConverter#viewToDom} options parameter.\n\t * @returns {Iterable.} DOM nodes.\n\t */\n\t* viewChildrenToDom( viewElement, domDocument, options = {} ) {\n\t\tconst fillerPositionOffset = viewElement.getFillerOffset && viewElement.getFillerOffset();\n\t\tlet offset = 0;\n\n\t\tfor ( const childView of viewElement.getChildren() ) {\n\t\t\tif ( fillerPositionOffset === offset ) {\n\t\t\t\tyield this._blockFiller( domDocument );\n\t\t\t}\n\n\t\t\tyield this.viewToDom( childView, domDocument, options );\n\n\t\t\toffset++;\n\t\t}\n\n\t\tif ( fillerPositionOffset === offset ) {\n\t\t\tyield this._blockFiller( domDocument );\n\t\t}\n\t}\n\n\t/**\n\t * Converts view {@link module:engine/view/range~Range} to DOM range.\n\t * Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.\n\t *\n\t * @param {module:engine/view/range~Range} viewRange View range.\n\t * @returns {Range} DOM range.\n\t */\n\tviewRangeToDom( viewRange ) {\n\t\tconst domStart = this.viewPositionToDom( viewRange.start );\n\t\tconst domEnd = this.viewPositionToDom( viewRange.end );\n\n\t\tconst domRange = document.createRange();\n\t\tdomRange.setStart( domStart.parent, domStart.offset );\n\t\tdomRange.setEnd( domEnd.parent, domEnd.offset );\n\n\t\treturn domRange;\n\t}\n\n\t/**\n\t * Converts view {@link module:engine/view/position~Position} to DOM parent and offset.\n\t *\n\t * Inline and block {@link module:engine/view/filler fillers} are handled during the conversion.\n\t * If the converted position is directly before inline filler it is moved inside the filler.\n\t *\n\t * @param {module:engine/view/position~Position} viewPosition View position.\n\t * @returns {Object|null} position DOM position or `null` if view position could not be converted to DOM.\n\t * @returns {Node} position.parent DOM position parent.\n\t * @returns {Number} position.offset DOM position offset.\n\t */\n\tviewPositionToDom( viewPosition ) {\n\t\tconst viewParent = viewPosition.parent;\n\n\t\tif ( viewParent.is( 'text' ) ) {\n\t\t\tconst domParent = this.findCorrespondingDomText( viewParent );\n\n\t\t\tif ( !domParent ) {\n\t\t\t\t// Position is in a view text node that has not been rendered to DOM yet.\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tlet offset = viewPosition.offset;\n\n\t\t\tif ( startsWithFiller( domParent ) ) {\n\t\t\t\toffset += INLINE_FILLER_LENGTH;\n\t\t\t}\n\n\t\t\treturn { parent: domParent, offset };\n\t\t} else {\n\t\t\t// viewParent is instance of ViewElement.\n\t\t\tlet domParent, domBefore, domAfter;\n\n\t\t\tif ( viewPosition.offset === 0 ) {\n\t\t\t\tdomParent = this.mapViewToDom( viewParent );\n\n\t\t\t\tif ( !domParent ) {\n\t\t\t\t\t// Position is in a view element that has not been rendered to DOM yet.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tdomAfter = domParent.childNodes[ 0 ];\n\t\t\t} else {\n\t\t\t\tconst nodeBefore = viewPosition.nodeBefore;\n\n\t\t\t\tdomBefore = nodeBefore.is( 'text' ) ?\n\t\t\t\t\tthis.findCorrespondingDomText( nodeBefore ) :\n\t\t\t\t\tthis.mapViewToDom( viewPosition.nodeBefore );\n\n\t\t\t\tif ( !domBefore ) {\n\t\t\t\t\t// Position is after a view element that has not been rendered to DOM yet.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tdomParent = domBefore.parentNode;\n\t\t\t\tdomAfter = domBefore.nextSibling;\n\t\t\t}\n\n\t\t\t// If there is an inline filler at position return position inside the filler. We should never return\n\t\t\t// the position before the inline filler.\n\t\t\tif ( isText( domAfter ) && startsWithFiller( domAfter ) ) {\n\t\t\t\treturn { parent: domAfter, offset: INLINE_FILLER_LENGTH };\n\t\t\t}\n\n\t\t\tconst offset = domBefore ? indexOf( domBefore ) + 1 : 0;\n\n\t\t\treturn { parent: domParent, offset };\n\t\t}\n\t}\n\n\t/**\n\t * Converts DOM to view. For all text nodes, not bound elements and document fragments new items will\n\t * be created. For bound elements and document fragments function will return corresponding items. For\n\t * {@link module:engine/view/filler fillers} `null` will be returned.\n\t * For all DOM elements rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * @param {Node|DocumentFragment} domNode DOM node or document fragment to transform.\n\t * @param {Object} [options] Conversion options.\n\t * @param {Boolean} [options.bind=false] Determines whether new elements will be bound.\n\t * @param {Boolean} [options.withChildren=true] If `true`, node's and document fragment's children will be converted too.\n\t * @param {Boolean} [options.keepOriginalCase=false] If `false`, node's tag name will be converter to lower case.\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null} Converted node or document fragment\n\t * or `null` if DOM node is a {@link module:engine/view/filler filler} or the given node is an empty text node.\n\t */\n\tdomToView( domNode, options = {} ) {\n\t\tif ( this.isBlockFiller( domNode, this.blockFillerMode ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// When node is inside UIElement return that UIElement as it's view representation.\n\t\tconst uiElement = this.getParentUIElement( domNode, this._domToViewMapping );\n\n\t\tif ( uiElement ) {\n\t\t\treturn uiElement;\n\t\t}\n\n\t\tif ( isText( domNode ) ) {\n\t\t\tif ( isInlineFiller( domNode ) ) {\n\t\t\t\treturn null;\n\t\t\t} else {\n\t\t\t\tconst textData = this._processDataFromDomText( domNode );\n\n\t\t\t\treturn textData === '' ? null : new ViewText( textData );\n\t\t\t}\n\t\t} else if ( this.isComment( domNode ) ) {\n\t\t\treturn null;\n\t\t} else {\n\t\t\tif ( this.mapDomToView( domNode ) ) {\n\t\t\t\treturn this.mapDomToView( domNode );\n\t\t\t}\n\n\t\t\tlet viewElement;\n\n\t\t\tif ( this.isDocumentFragment( domNode ) ) {\n\t\t\t\t// Create view document fragment.\n\t\t\t\tviewElement = new ViewDocumentFragment();\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindDocumentFragments( domNode, viewElement );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\t// Create view element.\n\t\t\t\tconst viewName = options.keepOriginalCase ? domNode.tagName : domNode.tagName.toLowerCase();\n\t\t\t\tviewElement = new ViewElement( viewName );\n\n\t\t\t\tif ( options.bind ) {\n\t\t\t\t\tthis.bindElements( domNode, viewElement );\n\t\t\t\t}\n\n\t\t\t\t// Copy element's attributes.\n\t\t\t\tconst attrs = domNode.attributes;\n\n\t\t\t\tfor ( let i = attrs.length - 1; i >= 0; i-- ) {\n\t\t\t\t\tviewElement._setAttribute( attrs[ i ].name, attrs[ i ].value );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif ( options.withChildren || options.withChildren === undefined ) {\n\t\t\t\tfor ( const child of this.domChildrenToView( domNode, options ) ) {\n\t\t\t\t\tviewElement._appendChild( child );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn viewElement;\n\t\t}\n\t}\n\n\t/**\n\t * Converts children of the DOM element to view nodes using\n\t * the {@link module:engine/view/domconverter~DomConverter#domToView} method.\n\t * Additionally this method omits block {@link module:engine/view/filler filler}, if it exists in the DOM parent.\n\t *\n\t * @param {HTMLElement} domElement Parent DOM element.\n\t * @param {Object} options See {@link module:engine/view/domconverter~DomConverter#domToView} options parameter.\n\t * @returns {Iterable.} View nodes.\n\t */\n\t* domChildrenToView( domElement, options = {} ) {\n\t\tfor ( let i = 0; i < domElement.childNodes.length; i++ ) {\n\t\t\tconst domChild = domElement.childNodes[ i ];\n\t\t\tconst viewChild = this.domToView( domChild, options );\n\n\t\t\tif ( viewChild !== null ) {\n\t\t\t\tyield viewChild;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Converts DOM selection to view {@link module:engine/view/selection~Selection}.\n\t * Ranges which cannot be converted will be omitted.\n\t *\n\t * @param {Selection} domSelection DOM selection.\n\t * @returns {module:engine/view/selection~Selection} View selection.\n\t */\n\tdomSelectionToView( domSelection ) {\n\t\t// DOM selection might be placed in fake selection container.\n\t\t// If container contains fake selection - return corresponding view selection.\n\t\tif ( domSelection.rangeCount === 1 ) {\n\t\t\tlet container = domSelection.getRangeAt( 0 ).startContainer;\n\n\t\t\t// The DOM selection might be moved to the text node inside the fake selection container.\n\t\t\tif ( isText( container ) ) {\n\t\t\t\tcontainer = container.parentNode;\n\t\t\t}\n\n\t\t\tconst viewSelection = this.fakeSelectionToView( container );\n\n\t\t\tif ( viewSelection ) {\n\t\t\t\treturn viewSelection;\n\t\t\t}\n\t\t}\n\n\t\tconst isBackward = this.isDomSelectionBackward( domSelection );\n\n\t\tconst viewRanges = [];\n\n\t\tfor ( let i = 0; i < domSelection.rangeCount; i++ ) {\n\t\t\t// DOM Range have correct start and end, no matter what is the DOM Selection direction. So we don't have to fix anything.\n\t\t\tconst domRange = domSelection.getRangeAt( i );\n\t\t\tconst viewRange = this.domRangeToView( domRange );\n\n\t\t\tif ( viewRange ) {\n\t\t\t\tviewRanges.push( viewRange );\n\t\t\t}\n\t\t}\n\n\t\treturn new ViewSelection( viewRanges, { backward: isBackward } );\n\t}\n\n\t/**\n\t * Converts DOM Range to view {@link module:engine/view/range~Range}.\n\t * If the start or end position can not be converted `null` is returned.\n\t *\n\t * @param {Range} domRange DOM range.\n\t * @returns {module:engine/view/range~Range|null} View range.\n\t */\n\tdomRangeToView( domRange ) {\n\t\tconst viewStart = this.domPositionToView( domRange.startContainer, domRange.startOffset );\n\t\tconst viewEnd = this.domPositionToView( domRange.endContainer, domRange.endOffset );\n\n\t\tif ( viewStart && viewEnd ) {\n\t\t\treturn new ViewRange( viewStart, viewEnd );\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Converts DOM parent and offset to view {@link module:engine/view/position~Position}.\n\t *\n\t * If the position is inside a {@link module:engine/view/filler filler} which has no corresponding view node,\n\t * position of the filler will be converted and returned.\n\t *\n\t * If the position is inside DOM element rendered by {@link module:engine/view/uielement~UIElement}\n\t * that position will be converted to view position before that UIElement.\n\t *\n\t * If structures are too different and it is not possible to find corresponding position then `null` will be returned.\n\t *\n\t * @param {Node} domParent DOM position parent.\n\t * @param {Number} domOffset DOM position offset.\n\t * @returns {module:engine/view/position~Position} viewPosition View position.\n\t */\n\tdomPositionToView( domParent, domOffset ) {\n\t\tif ( this.isBlockFiller( domParent, this.blockFillerMode ) ) {\n\t\t\treturn this.domPositionToView( domParent.parentNode, indexOf( domParent ) );\n\t\t}\n\n\t\t// If position is somewhere inside UIElement - return position before that element.\n\t\tconst viewElement = this.mapDomToView( domParent );\n\n\t\tif ( viewElement && viewElement.is( 'uiElement' ) ) {\n\t\t\treturn ViewPosition._createBefore( viewElement );\n\t\t}\n\n\t\tif ( isText( domParent ) ) {\n\t\t\tif ( isInlineFiller( domParent ) ) {\n\t\t\t\treturn this.domPositionToView( domParent.parentNode, indexOf( domParent ) );\n\t\t\t}\n\n\t\t\tconst viewParent = this.findCorrespondingViewText( domParent );\n\t\t\tlet offset = domOffset;\n\n\t\t\tif ( !viewParent ) {\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tif ( startsWithFiller( domParent ) ) {\n\t\t\t\toffset -= INLINE_FILLER_LENGTH;\n\t\t\t\toffset = offset < 0 ? 0 : offset;\n\t\t\t}\n\n\t\t\treturn new ViewPosition( viewParent, offset );\n\t\t}\n\t\t// domParent instanceof HTMLElement.\n\t\telse {\n\t\t\tif ( domOffset === 0 ) {\n\t\t\t\tconst viewParent = this.mapDomToView( domParent );\n\n\t\t\t\tif ( viewParent ) {\n\t\t\t\t\treturn new ViewPosition( viewParent, 0 );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tconst domBefore = domParent.childNodes[ domOffset - 1 ];\n\t\t\t\tconst viewBefore = isText( domBefore ) ?\n\t\t\t\t\tthis.findCorrespondingViewText( domBefore ) :\n\t\t\t\t\tthis.mapDomToView( domBefore );\n\n\t\t\t\t// TODO #663\n\t\t\t\tif ( viewBefore && viewBefore.parent ) {\n\t\t\t\t\treturn new ViewPosition( viewBefore.parent, viewBefore.index + 1 );\n\t\t\t\t}\n\t\t\t}\n\n\t\t\treturn null;\n\t\t}\n\t}\n\n\t/**\n\t * Returns corresponding view {@link module:engine/view/element~Element Element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment} for provided DOM element or\n\t * document fragment. If there is no view item {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * to the given DOM - `undefined` is returned.\n\t * For all DOM elements rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * @param {DocumentFragment|Element} domElementOrDocumentFragment DOM element or document fragment.\n\t * @returns {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment|undefined}\n\t * Corresponding view element, document fragment or `undefined` if no element was bound.\n\t */\n\tmapDomToView( domElementOrDocumentFragment ) {\n\t\treturn this.getParentUIElement( domElementOrDocumentFragment ) || this._domToViewMapping.get( domElementOrDocumentFragment );\n\t}\n\n\t/**\n\t * Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~DomConverter#bindElements bound},\n\t * corresponding text node is returned based on the sibling or parent.\n\t *\n\t * If the directly previous sibling is a {@link module:engine/view/domconverter~DomConverter#bindElements bound} element, it is used\n\t * to find the corresponding text node.\n\t *\n\t * If this is a first child in the parent and the parent is a {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * element, it is used to find the corresponding text node.\n\t *\n\t * For all text nodes rendered by {@link module:engine/view/uielement~UIElement} that UIElement will be returned.\n\t *\n\t * Otherwise `null` is returned.\n\t *\n\t * Note that for the block or inline {@link module:engine/view/filler filler} this method returns `null`.\n\t *\n\t * @param {Text} domText DOM text node.\n\t * @returns {module:engine/view/text~Text|null} Corresponding view text node or `null`, if it was not possible to find a\n\t * corresponding node.\n\t */\n\tfindCorrespondingViewText( domText ) {\n\t\tif ( isInlineFiller( domText ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// If DOM text was rendered by UIElement - return that element.\n\t\tconst uiElement = this.getParentUIElement( domText );\n\n\t\tif ( uiElement ) {\n\t\t\treturn uiElement;\n\t\t}\n\n\t\tconst previousSibling = domText.previousSibling;\n\n\t\t// Try to use previous sibling to find the corresponding text node.\n\t\tif ( previousSibling ) {\n\t\t\tif ( !( this.isElement( previousSibling ) ) ) {\n\t\t\t\t// The previous is text or comment.\n\t\t\t\treturn null;\n\t\t\t}\n\n\t\t\tconst viewElement = this.mapDomToView( previousSibling );\n\n\t\t\tif ( viewElement ) {\n\t\t\t\tconst nextSibling = viewElement.nextSibling;\n\n\t\t\t\t// It might be filler which has no corresponding view node.\n\t\t\t\tif ( nextSibling instanceof ViewText ) {\n\t\t\t\t\treturn viewElement.nextSibling;\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\t// Try to use parent to find the corresponding text node.\n\t\telse {\n\t\t\tconst viewElement = this.mapDomToView( domText.parentNode );\n\n\t\t\tif ( viewElement ) {\n\t\t\t\tconst firstChild = viewElement.getChild( 0 );\n\n\t\t\t\t// It might be filler which has no corresponding view node.\n\t\t\t\tif ( firstChild instanceof ViewText ) {\n\t\t\t\t\treturn firstChild;\n\t\t\t\t} else {\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Returns corresponding DOM item for provided {@link module:engine/view/element~Element Element} or\n\t * {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment}.\n\t * To find a corresponding text for {@link module:engine/view/text~Text view Text instance}\n\t * use {@link #findCorrespondingDomText}.\n\t *\n\t * @param {module:engine/view/element~Element|module:engine/view/documentfragment~DocumentFragment} viewNode\n\t * View element or document fragment.\n\t * @returns {Node|DocumentFragment|undefined} Corresponding DOM node or document fragment.\n\t */\n\tmapViewToDom( documentFragmentOrElement ) {\n\t\treturn this._viewToDomMapping.get( documentFragmentOrElement );\n\t}\n\n\t/**\n\t * Finds corresponding text node. Text nodes are not {@link module:engine/view/domconverter~DomConverter#bindElements bound},\n\t * corresponding text node is returned based on the sibling or parent.\n\t *\n\t * If the directly previous sibling is a {@link module:engine/view/domconverter~DomConverter#bindElements bound} element, it is used\n\t * to find the corresponding text node.\n\t *\n\t * If this is a first child in the parent and the parent is a {@link module:engine/view/domconverter~DomConverter#bindElements bound}\n\t * element, it is used to find the corresponding text node.\n\t *\n\t * Otherwise `null` is returned.\n\t *\n\t * @param {module:engine/view/text~Text} viewText View text node.\n\t * @returns {Text|null} Corresponding DOM text node or `null`, if it was not possible to find a corresponding node.\n\t */\n\tfindCorrespondingDomText( viewText ) {\n\t\tconst previousSibling = viewText.previousSibling;\n\n\t\t// Try to use previous sibling to find the corresponding text node.\n\t\tif ( previousSibling && this.mapViewToDom( previousSibling ) ) {\n\t\t\treturn this.mapViewToDom( previousSibling ).nextSibling;\n\t\t}\n\n\t\t// If this is a first node, try to use parent to find the corresponding text node.\n\t\tif ( !previousSibling && viewText.parent && this.mapViewToDom( viewText.parent ) ) {\n\t\t\treturn this.mapViewToDom( viewText.parent ).childNodes[ 0 ];\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Focuses DOM editable that is corresponding to provided {@link module:engine/view/editableelement~EditableElement}.\n\t *\n\t * @param {module:engine/view/editableelement~EditableElement} viewEditable\n\t */\n\tfocus( viewEditable ) {\n\t\tconst domEditable = this.mapViewToDom( viewEditable );\n\n\t\tif ( domEditable && domEditable.ownerDocument.activeElement !== domEditable ) {\n\t\t\t// Save the scrollX and scrollY positions before the focus.\n\t\t\tconst { scrollX, scrollY } = global.window;\n\t\t\tconst scrollPositions = [];\n\n\t\t\t// Save all scrollLeft and scrollTop values starting from domEditable up to\n\t\t\t// document#documentElement.\n\t\t\tforEachDomNodeAncestor( domEditable, node => {\n\t\t\t\tconst { scrollLeft, scrollTop } = node;\n\n\t\t\t\tscrollPositions.push( [ scrollLeft, scrollTop ] );\n\t\t\t} );\n\n\t\t\tdomEditable.focus();\n\n\t\t\t// Restore scrollLeft and scrollTop values starting from domEditable up to\n\t\t\t// document#documentElement.\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/951\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/957\n\t\t\tforEachDomNodeAncestor( domEditable, node => {\n\t\t\t\tconst [ scrollLeft, scrollTop ] = scrollPositions.shift();\n\n\t\t\t\tnode.scrollLeft = scrollLeft;\n\t\t\t\tnode.scrollTop = scrollTop;\n\t\t\t} );\n\n\t\t\t// Restore the scrollX and scrollY positions after the focus.\n\t\t\t// https://github.com/ckeditor/ckeditor5-engine/issues/951\n\t\t\tglobal.window.scrollTo( scrollX, scrollY );\n\t\t}\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.ELEMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisElement( node ) {\n\t\treturn node && node.nodeType == Node.ELEMENT_NODE;\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.DOCUMENT_FRAGMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisDocumentFragment( node ) {\n\t\treturn node && node.nodeType == Node.DOCUMENT_FRAGMENT_NODE;\n\t}\n\n\t/**\n\t * Returns `true` when `node.nodeType` equals `Node.COMMENT_NODE`.\n\t *\n\t * @param {Node} node Node to check.\n\t * @returns {Boolean}\n\t */\n\tisComment( node ) {\n\t\treturn node && node.nodeType == Node.COMMENT_NODE;\n\t}\n\n\t/**\n\t * Checks if the node is an instance of the block filler for this DOM converter.\n\t *\n\t *\t\tconst converter = new DomConverter( { blockFillerMode: 'br' } );\n\t *\n\t *\t\tconverter.isBlockFiller( BR_FILLER( document ) ); // true\n\t *\t\tconverter.isBlockFiller( NBSP_FILLER( document ) ); // false\n\t *\n\t * **Note:**: For the `'nbsp'` mode the method also checks context of a node so it cannot be a detached node.\n\t *\n\t * **Note:** A special case in the `'nbsp'` mode exists where the `
` in `


` is treated as a block filler.\n\t *\n\t * @param {Node} domNode DOM node to check.\n\t * @returns {Boolean} True if a node is considered a block filler for given mode.\n\t */\n\tisBlockFiller( domNode ) {\n\t\tif ( this.blockFillerMode == 'br' ) {\n\t\t\treturn domNode.isEqualNode( BR_FILLER_REF );\n\t\t}\n\n\t\t// Special case for


in which case the
should be treated as filler even\n\t\t// when we're in the 'nbsp' mode. See ckeditor5#5564.\n\t\tif ( domNode.tagName === 'BR' && hasBlockParent( domNode, this.blockElements ) && domNode.parentNode.childNodes.length === 1 ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn isNbspBlockFiller( domNode, this.blockElements );\n\t}\n\n\t/**\n\t * Returns `true` if given selection is a backward selection, that is, if it's `focus` is before `anchor`.\n\t *\n\t * @param {Selection} DOM Selection instance to check.\n\t * @returns {Boolean}\n\t */\n\tisDomSelectionBackward( selection ) {\n\t\tif ( selection.isCollapsed ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Since it takes multiple lines of code to check whether a \"DOM Position\" is before/after another \"DOM Position\",\n\t\t// we will use the fact that range will collapse if it's end is before it's start.\n\t\tconst range = document.createRange();\n\n\t\trange.setStart( selection.anchorNode, selection.anchorOffset );\n\t\trange.setEnd( selection.focusNode, selection.focusOffset );\n\n\t\tconst backward = range.collapsed;\n\n\t\trange.detach();\n\n\t\treturn backward;\n\t}\n\n\t/**\n\t * Returns parent {@link module:engine/view/uielement~UIElement} for provided DOM node. Returns `null` if there is no\n\t * parent UIElement.\n\t *\n\t * @param {Node} domNode\n\t * @returns {module:engine/view/uielement~UIElement|null}\n\t */\n\tgetParentUIElement( domNode ) {\n\t\tconst ancestors = getAncestors( domNode );\n\n\t\t// Remove domNode from the list.\n\t\tancestors.pop();\n\n\t\twhile ( ancestors.length ) {\n\t\t\tconst domNode = ancestors.pop();\n\t\t\tconst viewNode = this._domToViewMapping.get( domNode );\n\n\t\t\tif ( viewNode && viewNode.is( 'uiElement' ) ) {\n\t\t\t\treturn viewNode;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Checks if given selection's boundaries are at correct places.\n\t *\n\t * The following places are considered as incorrect for selection boundaries:\n\t * * before or in the middle of the inline filler sequence,\n\t * * inside the DOM element which represents {@link module:engine/view/uielement~UIElement a view ui element}.\n\t *\n\t * @param {Selection} domSelection DOM Selection object to be checked.\n\t * @returns {Boolean} `true` if the given selection is at a correct place, `false` otherwise.\n\t */\n\tisDomSelectionCorrect( domSelection ) {\n\t\treturn this._isDomSelectionPositionCorrect( domSelection.anchorNode, domSelection.anchorOffset ) &&\n\t\t\tthis._isDomSelectionPositionCorrect( domSelection.focusNode, domSelection.focusOffset );\n\t}\n\n\t/**\n\t * Checks if the given DOM position is a correct place for selection boundary. See {@link #isDomSelectionCorrect}.\n\t *\n\t * @private\n\t * @param {Element} domParent Position parent.\n\t * @param {Number} offset Position offset.\n\t * @returns {Boolean} `true` if given position is at a correct place for selection boundary, `false` otherwise.\n\t */\n\t_isDomSelectionPositionCorrect( domParent, offset ) {\n\t\t// If selection is before or in the middle of inline filler string, it is incorrect.\n\t\tif ( isText( domParent ) && startsWithFiller( domParent ) && offset < INLINE_FILLER_LENGTH ) {\n\t\t\t// Selection in a text node, at wrong position (before or in the middle of filler).\n\t\t\treturn false;\n\t\t}\n\n\t\tif ( this.isElement( domParent ) && startsWithFiller( domParent.childNodes[ offset ] ) ) {\n\t\t\t// Selection in an element node, before filler text node.\n\t\t\treturn false;\n\t\t}\n\n\t\tconst viewParent = this.mapDomToView( domParent );\n\n\t\t// If selection is in `view.UIElement`, it is incorrect. Note that `mapDomToView()` returns `view.UIElement`\n\t\t// also for any dom element that is inside the view ui element (so we don't need to perform any additional checks).\n\t\tif ( viewParent && viewParent.is( 'uiElement' ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Takes text data from a given {@link module:engine/view/text~Text#data} and processes it so\n\t * it is correctly displayed in the DOM.\n\t *\n\t * Following changes are done:\n\t *\n\t * * a space at the beginning is changed to ` ` if this is the first text node in its container\n\t * element or if a previous text node ends with a space character,\n\t * * space at the end of the text node is changed to ` ` if there are two spaces at the end of a node or if next node\n\t * starts with a space or if it is the last text node in its container,\n\t * * remaining spaces are replaced to a chain of spaces and ` ` (e.g. `'x x'` becomes `'x   x'`).\n\t *\n\t * Content of {@link #preElements} is not processed.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node View text node to process.\n\t * @returns {String} Processed text data.\n\t */\n\t_processDataFromViewText( node ) {\n\t\tlet data = node.data;\n\n\t\t// If any of node ancestors has a name which is in `preElements` array, then currently processed\n\t\t// view text node is (will be) in preformatted element. We should not change whitespaces then.\n\t\tif ( node.getAncestors().some( parent => this.preElements.includes( parent.name ) ) ) {\n\t\t\treturn data;\n\t\t}\n\n\t\t// 1. Replace the first space with a nbsp if the previous node ends with a space or there is no previous node\n\t\t// (container element boundary).\n\t\tif ( data.charAt( 0 ) == ' ' ) {\n\t\t\tconst prevNode = this._getTouchingViewTextNode( node, false );\n\t\t\tconst prevEndsWithSpace = prevNode && this._nodeEndsWithSpace( prevNode );\n\n\t\t\tif ( prevEndsWithSpace || !prevNode ) {\n\t\t\t\tdata = '\\u00A0' + data.substr( 1 );\n\t\t\t}\n\t\t}\n\n\t\t// 2. Replace the last space with nbsp if there are two spaces at the end or if the next node starts with space or there is no\n\t\t// next node (container element boundary).\n\t\t//\n\t\t// Keep in mind that Firefox prefers $nbsp; before tag, not inside it:\n\t\t//\n\t\t// Foo  bar <-- bad.\n\t\t// Foo  bar <-- good.\n\t\t//\n\t\t// More here: https://github.com/ckeditor/ckeditor5-engine/issues/1747.\n\t\tif ( data.charAt( data.length - 1 ) == ' ' ) {\n\t\t\tconst nextNode = this._getTouchingViewTextNode( node, true );\n\n\t\t\tif ( data.charAt( data.length - 2 ) == ' ' || !nextNode || nextNode.data.charAt( 0 ) == ' ' ) {\n\t\t\t\tdata = data.substr( 0, data.length - 1 ) + '\\u00A0';\n\t\t\t}\n\t\t}\n\n\t\t// 3. Create space+nbsp pairs.\n\t\treturn data.replace( / {2}/g, ' \\u00A0' );\n\t}\n\n\t/**\n\t * Checks whether given node ends with a space character after changing appropriate space characters to ` `s.\n\t *\n\t * @private\n\t * @param {module:engine/view/text~Text} node Node to check.\n\t * @returns {Boolean} `true` if given `node` ends with space, `false` otherwise.\n\t */\n\t_nodeEndsWithSpace( node ) {\n\t\tif ( node.getAncestors().some( parent => this.preElements.includes( parent.name ) ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\tconst data = this._processDataFromViewText( node );\n\n\t\treturn data.charAt( data.length - 1 ) == ' ';\n\t}\n\n\t/**\n\t * Takes text data from native `Text` node and processes it to a correct {@link module:engine/view/text~Text view text node} data.\n\t *\n\t * Following changes are done:\n\t *\n\t * * multiple whitespaces are replaced to a single space,\n\t * * space at the beginning of a text node is removed if it is the first text node in its container\n\t * element or if the previous text node ends with a space character,\n\t * * space at the end of the text node is removed if there are two spaces at the end of a node or if next node\n\t * starts with a space or if it is the last text node in its container\n\t * * nbsps are converted to spaces.\n\t *\n\t * @param {Node} node DOM text node to process.\n\t * @returns {String} Processed data.\n\t * @private\n\t */\n\t_processDataFromDomText( node ) {\n\t\tlet data = node.data;\n\n\t\tif ( _hasDomParentOfType( node, this.preElements ) ) {\n\t\t\treturn getDataWithoutFiller( node );\n\t\t}\n\n\t\t// Change all consecutive whitespace characters (from the [ \\n\\t\\r] set –\n\t\t// see https://github.com/ckeditor/ckeditor5-engine/issues/822#issuecomment-311670249) to a single space character.\n\t\t// That's how multiple whitespaces are treated when rendered, so we normalize those whitespaces.\n\t\t// We're replacing 1+ (and not 2+) to also normalize singular \\n\\t\\r characters (#822).\n\t\tdata = data.replace( /[ \\n\\t\\r]{1,}/g, ' ' );\n\n\t\tconst prevNode = this._getTouchingInlineDomNode( node, false );\n\t\tconst nextNode = this._getTouchingInlineDomNode( node, true );\n\n\t\tconst shouldLeftTrim = this._checkShouldLeftTrimDomText( prevNode );\n\t\tconst shouldRightTrim = this._checkShouldRightTrimDomText( node, nextNode );\n\n\t\t// If the previous dom text node does not exist or it ends by whitespace character, remove space character from the beginning\n\t\t// of this text node. Such space character is treated as a whitespace.\n\t\tif ( shouldLeftTrim ) {\n\t\t\tdata = data.replace( /^ /, '' );\n\t\t}\n\n\t\t// If the next text node does not exist remove space character from the end of this text node.\n\t\tif ( shouldRightTrim ) {\n\t\t\tdata = data.replace( / $/, '' );\n\t\t}\n\n\t\t// At the beginning and end of a block element, Firefox inserts normal space +
instead of non-breaking space.\n\t\t// This means that the text node starts/end with normal space instead of non-breaking space.\n\t\t// This causes a problem because the normal space would be removed in `.replace` calls above. To prevent that,\n\t\t// the inline filler is removed only after the data is initially processed (by the `.replace` above). See ckeditor5#692.\n\t\tdata = getDataWithoutFiller( new Text( data ) );\n\n\t\t// At this point we should have removed all whitespaces from DOM text data.\n\t\t//\n\t\t// Now, We will reverse the process that happens in `_processDataFromViewText`.\n\t\t//\n\t\t// We have to change   chars, that were in DOM text data because of rendering reasons, to spaces.\n\t\t// First, change all ` \\u00A0` pairs (space +  ) to two spaces. DOM converter changes two spaces from model/view to\n\t\t// ` \\u00A0` to ensure proper rendering. Since here we convert back, we recognize those pairs and change them back to ` `.\n\t\tdata = data.replace( / \\u00A0/g, ' ' );\n\n\t\t// Then, let's change the last nbsp to a space.\n\t\tif ( /( |\\u00A0)\\u00A0$/.test( data ) || !nextNode || ( nextNode.data && nextNode.data.charAt( 0 ) == ' ' ) ) {\n\t\t\tdata = data.replace( /\\u00A0$/, ' ' );\n\t\t}\n\n\t\t// Then, change   character that is at the beginning of the text node to space character.\n\t\t// We do that replacement only if this is the first node or the previous node ends on whitespace character.\n\t\tif ( shouldLeftTrim ) {\n\t\t\tdata = data.replace( /^\\u00A0/, ' ' );\n\t\t}\n\n\t\t// At this point, all whitespaces should be removed and all   created for rendering reasons should be\n\t\t// changed to normal space. All left   are   inserted intentionally.\n\t\treturn data;\n\t}\n\n\t/**\n\t * Helper function which checks if a DOM text node, preceded by the given `prevNode` should\n\t * be trimmed from the left side.\n\t *\n\t * @param {Node} prevNode\n\t */\n\t_checkShouldLeftTrimDomText( prevNode ) {\n\t\tif ( !prevNode ) {\n\t\t\treturn true;\n\t\t}\n\n\t\tif ( isElement( prevNode ) ) {\n\t\t\treturn true;\n\t\t}\n\n\t\treturn /[^\\S\\u00A0]/.test( prevNode.data.charAt( prevNode.data.length - 1 ) );\n\t}\n\n\t/**\n\t * Helper function which checks if a DOM text node, succeeded by the given `nextNode` should\n\t * be trimmed from the right side.\n\t *\n\t * @param {Node} node\n\t * @param {Node} nextNode\n\t */\n\t_checkShouldRightTrimDomText( node, nextNode ) {\n\t\tif ( nextNode ) {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn !startsWithFiller( node );\n\t}\n\n\t/**\n\t * Helper function. For given {@link module:engine/view/text~Text view text node}, it finds previous or next sibling\n\t * that is contained in the same container element. If there is no such sibling, `null` is returned.\n\t *\n\t * @param {module:engine/view/text~Text} node Reference node.\n\t * @param {Boolean} getNext\n\t * @returns {module:engine/view/text~Text|null} Touching text node or `null` if there is no next or previous touching text node.\n\t */\n\t_getTouchingViewTextNode( node, getNext ) {\n\t\tconst treeWalker = new ViewTreeWalker( {\n\t\t\tstartPosition: getNext ? ViewPosition._createAfter( node ) : ViewPosition._createBefore( node ),\n\t\t\tdirection: getNext ? 'forward' : 'backward'\n\t\t} );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\t// ViewContainerElement is found on a way to next ViewText node, so given `node` was first/last\n\t\t\t// text node in its container element.\n\t\t\tif ( value.item.is( 'containerElement' ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t//
found – it works like a block boundary, so do not scan further.\n\t\t\telse if ( value.item.is( 'br' ) ) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t// Found a text node in the same container element.\n\t\t\telse if ( value.item.is( 'textProxy' ) ) {\n\t\t\t\treturn value.item;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Helper function. For the given text node, it finds the closest touching node which is either\n\t * a text node or a `
`. The search is terminated at block element boundaries and if a matching node\n\t * wasn't found so far, `null` is returned.\n\t *\n\t * In the following DOM structure:\n\t *\n\t *\t\t

foobar
bom

\n\t *\n\t * * `foo` doesn't have its previous touching inline node (`null` is returned),\n\t * * `foo`'s next touching inline node is `bar`\n\t * * `bar`'s next touching inline node is `
`\n\t *\n\t * This method returns text nodes and `
` elements because these types of nodes affect how\n\t * spaces in the given text node need to be converted.\n\t *\n\t * @private\n\t * @param {Text} node\n\t * @param {Boolean} getNext\n\t * @returns {Text|Element|null}\n\t */\n\t_getTouchingInlineDomNode( node, getNext ) {\n\t\tif ( !node.parentNode ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tconst direction = getNext ? 'nextNode' : 'previousNode';\n\t\tconst document = node.ownerDocument;\n\t\tconst topmostParent = getAncestors( node )[ 0 ];\n\n\t\tconst treeWalker = document.createTreeWalker( topmostParent, NodeFilter.SHOW_TEXT | NodeFilter.SHOW_ELEMENT, {\n\t\t\tacceptNode( node ) {\n\t\t\t\tif ( isText( node ) ) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t}\n\n\t\t\t\tif ( node.tagName == 'BR' ) {\n\t\t\t\t\treturn NodeFilter.FILTER_ACCEPT;\n\t\t\t\t}\n\n\t\t\t\treturn NodeFilter.FILTER_SKIP;\n\t\t\t}\n\t\t} );\n\n\t\ttreeWalker.currentNode = node;\n\n\t\tconst touchingNode = treeWalker[ direction ]();\n\n\t\tif ( touchingNode !== null ) {\n\t\t\tconst lca = getCommonAncestor( node, touchingNode );\n\n\t\t\t// If there is common ancestor between the text node and next/prev text node,\n\t\t\t// and there are no block elements on a way from the text node to that ancestor,\n\t\t\t// and there are no block elements on a way from next/prev text node to that ancestor...\n\t\t\tif (\n\t\t\t\tlca &&\n\t\t\t\t!_hasDomParentOfType( node, this.blockElements, lca ) &&\n\t\t\t\t!_hasDomParentOfType( touchingNode, this.blockElements, lca )\n\t\t\t) {\n\t\t\t\t// Then they are in the same container element.\n\t\t\t\treturn touchingNode;\n\t\t\t}\n\t\t}\n\n\t\treturn null;\n\t}\n}\n\n// Helper function.\n// Used to check if given native `Element` or `Text` node has parent with tag name from `types` array.\n//\n// @param {Node} node\n// @param {Array.} types\n// @param {Boolean} [boundaryParent] Can be given if parents should be checked up to a given element (excluding that element).\n// @returns {Boolean} `true` if such parent exists or `false` if it does not.\nfunction _hasDomParentOfType( node, types, boundaryParent ) {\n\tlet parents = getAncestors( node );\n\n\tif ( boundaryParent ) {\n\t\tparents = parents.slice( parents.indexOf( boundaryParent ) + 1 );\n\t}\n\n\treturn parents.some( parent => parent.tagName && types.includes( parent.tagName.toLowerCase() ) );\n}\n\n// A helper that executes given callback for each DOM node's ancestor, starting from the given node\n// and ending in document#documentElement.\n//\n// @param {Node} node\n// @param {Function} callback A callback to be executed for each ancestor.\nfunction forEachDomNodeAncestor( node, callback ) {\n\twhile ( node && node != global.document ) {\n\t\tcallback( node );\n\t\tnode = node.parentNode;\n\t}\n}\n\n// Checks if given node is a nbsp block filler.\n//\n// A   is a block filler only if it is a single child of a block element.\n//\n// @param {Node} domNode DOM node.\n// @returns {Boolean}\nfunction isNbspBlockFiller( domNode, blockElements ) {\n\tconst isNBSP = isText( domNode ) && domNode.data == '\\u00A0';\n\n\treturn isNBSP && hasBlockParent( domNode, blockElements ) && domNode.parentNode.childNodes.length === 1;\n}\n\n// Checks if domNode has block parent.\n//\n// @param {Node} domNode DOM node.\n// @returns {Boolean}\nfunction hasBlockParent( domNode, blockElements ) {\n\tconst parent = domNode.parentNode;\n\n\treturn parent && parent.tagName && blockElements.includes( parent.tagName.toLowerCase() );\n}\n\n/**\n * Enum representing type of the block filler.\n *\n * Possible values:\n *\n * * `br` - for `
` block filler used in editing view,\n * * `nbsp` - for ` ` block fillers used in the data.\n *\n * @typedef {String} module:engine/view/filler~BlockFillerMode\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getcommonancestor\n */\n\nimport getAncestors from './getancestors';\n\n/**\n * Searches and returns the lowest common ancestor of two given nodes.\n *\n * @param {Node} nodeA First node.\n * @param {Node} nodeB Second node.\n * @returns {Node|DocumentFragment|Document|null} Lowest common ancestor of both nodes or `null` if nodes do not have a common ancestor.\n */\nexport default function getCommonAncestor( nodeA, nodeB ) {\n\tconst ancestorsA = getAncestors( nodeA );\n\tconst ancestorsB = getAncestors( nodeB );\n\n\tlet i = 0;\n\n\t// It does not matter which array is shorter.\n\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\ti++;\n\t}\n\n\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/iswindow\n */\n\n/**\n * Checks if the object is a native DOM Window.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isWindow( obj ) {\n\tconst stringifiedObject = Object.prototype.toString.apply( obj );\n\n\t// Returns `true` for the `window` object in browser environments.\n\tif ( stringifiedObject == '[object Window]' ) {\n\t\treturn true;\n\t}\n\n\t// Returns `true` for the `window` object in the Electron environment.\n\tif ( stringifiedObject == '[object global]' ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/emittermixin\n */\n\nimport { default as EmitterMixin, _getEmitterListenedTo, _setEmitterId } from '../emittermixin';\nimport uid from '../uid';\nimport isNode from './isnode';\nimport isWindow from './iswindow';\nimport { extend } from 'lodash-es';\n\n/**\n * Mixin that injects the DOM events API into its host. It provides the API\n * compatible with {@link module:utils/emittermixin~EmitterMixin}.\n *\n * DOM emitter mixin is by default available in the {@link module:ui/view~View} class,\n * but it can also be mixed into any other class:\n *\n *\t\timport mix from '../utils/mix.js';\n *\t\timport DomEmitterMixin from '../utils/dom/emittermixin.js';\n *\n *\t\tclass SomeView {}\n *\t\tmix( SomeView, DomEmitterMixin );\n *\n *\t\tconst view = new SomeView();\n *\t\tview.listenTo( domElement, ( evt, domEvt ) => {\n *\t\t\tconsole.log( evt, domEvt );\n *\t\t} );\n *\n * @mixin EmitterMixin\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/dom/emittermixin~Emitter\n */\nconst DomEmitterMixin = extend( {}, EmitterMixin, {\n\t/**\n\t * Registers a callback function to be executed when an event is fired in a specific Emitter or DOM Node.\n\t * It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#listenTo}.\n\t *\n\t * @param {module:utils/emittermixin~Emitter|Node} emitter The object that fires the event.\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n\t * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n\t * order they were added.\n\t * @param {Boolean} [options.useCapture=false] Indicates that events of this type will be dispatched to the registered\n\t * listener before being dispatched to any EventTarget beneath it in the DOM tree.\n\t */\n\tlistenTo( emitter, ...rest ) {\n\t\t// Check if emitter is an instance of DOM Node. If so, replace the argument with\n\t\t// corresponding ProxyEmitter (or create one if not existing).\n\t\tif ( isNode( emitter ) || isWindow( emitter ) ) {\n\t\t\tconst proxy = this._getProxyEmitter( emitter ) || new ProxyEmitter( emitter );\n\n\t\t\tproxy.attach( ...rest );\n\n\t\t\temitter = proxy;\n\t\t}\n\n\t\t// Execute parent class method with Emitter (or ProxyEmitter) instance.\n\t\tEmitterMixin.listenTo.call( this, emitter, ...rest );\n\t},\n\n\t/**\n\t * Stops listening for events. It can be used at different levels:\n\t * It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#listenTo}.\n\t *\n\t * * To stop listening to a specific callback.\n\t * * To stop listening to a specific event.\n\t * * To stop listening to all events fired by a specific object.\n\t * * To stop listening to all events fired by all object.\n\t *\n\t * @param {module:utils/emittermixin~Emitter|Node} [emitter] The object to stop listening to. If omitted, stops it for all objects.\n\t * @param {String} [event] (Requires the `emitter`) The name of the event to stop listening to. If omitted, stops it\n\t * for all events from `emitter`.\n\t * @param {Function} [callback] (Requires the `event`) The function to be removed from the call list for the given\n\t * `event`.\n\t */\n\tstopListening( emitter, event, callback ) {\n\t\t// Check if emitter is an instance of DOM Node. If so, replace the argument with corresponding ProxyEmitter.\n\t\tif ( isNode( emitter ) || isWindow( emitter ) ) {\n\t\t\tconst proxy = this._getProxyEmitter( emitter );\n\n\t\t\t// Element has no listeners.\n\t\t\tif ( !proxy ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\temitter = proxy;\n\t\t}\n\n\t\t// Execute parent class method with Emitter (or ProxyEmitter) instance.\n\t\tEmitterMixin.stopListening.call( this, emitter, event, callback );\n\n\t\tif ( emitter instanceof ProxyEmitter ) {\n\t\t\temitter.detach( event );\n\t\t}\n\t},\n\n\t/**\n\t * Retrieves ProxyEmitter instance for given DOM Node residing in this Host.\n\t *\n\t * @pivate\n\t * @param {Node} node DOM Node of the ProxyEmitter.\n\t * @returns {module:utils/dom/emittermixin~ProxyEmitter} ProxyEmitter instance or null.\n\t */\n\t_getProxyEmitter( node ) {\n\t\treturn _getEmitterListenedTo( this, getNodeUID( node ) );\n\t}\n} );\n\nexport default DomEmitterMixin;\n\n/**\n * Creates a ProxyEmitter instance. Such an instance is a bridge between a DOM Node firing events\n * and any Host listening to them. It is backwards compatible with {@link module:utils/emittermixin~EmitterMixin#on}.\n *\n * listenTo( click, ... )\n * +-----------------------------------------+\n * | stopListening( ... ) |\n * +----------------------------+ | addEventListener( click, ... )\n * | Host | | +---------------------------------------------+\n * +----------------------------+ | | removeEventListener( click, ... ) |\n * | _listeningTo: { | +----------v-------------+ |\n * | UID: { | | ProxyEmitter | |\n * | emitter: ProxyEmitter, | +------------------------+ +------------v----------+\n * | callbacks: { | | events: { | | Node (HTMLElement) |\n * | click: [ callbacks ] | | click: [ callbacks ] | +-----------------------+\n * | } | | }, | | data-ck-expando: UID |\n * | } | | _domNode: Node, | +-----------------------+\n * | } | | _domListeners: {}, | |\n * | +------------------------+ | | _emitterId: UID | |\n * | | DomEmitterMixin | | +--------------^---------+ |\n * | +------------------------+ | | | |\n * +--------------^-------------+ | +---------------------------------------------+\n * | | click (DOM Event)\n * +-----------------------------------------+\n * fire( click, DOM Event )\n *\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/dom/emittermixin~Emitter\n * @private\n */\nclass ProxyEmitter {\n\t/**\n\t * @param {Node} node DOM Node that fires events.\n\t * @returns {Object} ProxyEmitter instance bound to the DOM Node.\n\t */\n\tconstructor( node ) {\n\t\t// Set emitter ID to match DOM Node \"expando\" property.\n\t\t_setEmitterId( this, getNodeUID( node ) );\n\n\t\t// Remember the DOM Node this ProxyEmitter is bound to.\n\t\tthis._domNode = node;\n\t}\n}\n\nextend( ProxyEmitter.prototype, EmitterMixin, {\n\t/**\n\t * Collection of native DOM listeners.\n\t *\n\t * @private\n\t * @member {Object} module:utils/dom/emittermixin~ProxyEmitter#_domListeners\n\t */\n\n\t/**\n\t * Registers a callback function to be executed when an event is fired.\n\t *\n\t * It attaches a native DOM listener to the DOM Node. When fired,\n\t * a corresponding Emitter event will also fire with DOM Event object as an argument.\n\t *\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#attach\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {Boolean} [options.useCapture=false] Indicates that events of this type will be dispatched to the registered\n\t * listener before being dispatched to any EventTarget beneath it in the DOM tree.\n\t */\n\tattach( event, callback, options = {} ) {\n\t\t// If the DOM Listener for given event already exist it is pointless\n\t\t// to attach another one.\n\t\tif ( this._domListeners && this._domListeners[ event ] ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domListener = this._createDomListener( event, !!options.useCapture );\n\n\t\t// Attach the native DOM listener to DOM Node.\n\t\tthis._domNode.addEventListener( event, domListener, !!options.useCapture );\n\n\t\tif ( !this._domListeners ) {\n\t\t\tthis._domListeners = {};\n\t\t}\n\n\t\t// Store the native DOM listener in this ProxyEmitter. It will be helpful\n\t\t// when stopping listening to the event.\n\t\tthis._domListeners[ event ] = domListener;\n\t},\n\n\t/**\n\t * Stops executing the callback on the given event.\n\t *\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#detach\n\t * @param {String} event The name of the event.\n\t */\n\tdetach( event ) {\n\t\tlet events;\n\n\t\t// Remove native DOM listeners which are orphans. If no callbacks\n\t\t// are awaiting given event, detach native DOM listener from DOM Node.\n\t\t// See: {@link attach}.\n\n\t\tif ( this._domListeners[ event ] && ( !( events = this._events[ event ] ) || !events.callbacks.length ) ) {\n\t\t\tthis._domListeners[ event ].removeListener();\n\t\t}\n\t},\n\n\t/**\n\t * Creates a native DOM listener callback. When the native DOM event\n\t * is fired it will fire corresponding event on this ProxyEmitter.\n\t * Note: A native DOM Event is passed as an argument.\n\t *\n\t * @private\n\t * @method module:utils/dom/emittermixin~ProxyEmitter#_createDomListener\n\t * @param {String} event The name of the event.\n\t * @param {Boolean} useCapture Indicates whether the listener was created for capturing event.\n\t * @returns {Function} The DOM listener callback.\n\t */\n\t_createDomListener( event, useCapture ) {\n\t\tconst domListener = domEvt => {\n\t\t\tthis.fire( event, domEvt );\n\t\t};\n\n\t\t// Supply the DOM listener callback with a function that will help\n\t\t// detach it from the DOM Node, when it is no longer necessary.\n\t\t// See: {@link detach}.\n\t\tdomListener.removeListener = () => {\n\t\t\tthis._domNode.removeEventListener( event, domListener, useCapture );\n\t\t\tdelete this._domListeners[ event ];\n\t\t};\n\n\t\treturn domListener;\n\t}\n} );\n\n// Gets an unique DOM Node identifier. The identifier will be set if not defined.\n//\n// @private\n// @param {Node} node\n// @returns {String} UID for given DOM Node.\nfunction getNodeUID( node ) {\n\treturn node[ 'data-ck-expando' ] || ( node[ 'data-ck-expando' ] = uid() );\n}\n\n/**\n * Interface representing classes which mix in {@link module:utils/dom/emittermixin~EmitterMixin}.\n *\n * @interface Emitter\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/observer\n */\n\nimport DomEmitterMixin from '@ckeditor/ckeditor5-utils/src/dom/emittermixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * Abstract base observer class. Observers are classes which listen to DOM events, do the preliminary\n * processing and fire events on the {@link module:engine/view/document~Document} objects.\n * Observers can also add features to the view, for instance by updating its status or marking elements\n * which need refresh on DOM events.\n *\n * @abstract\n */\nexport default class Observer {\n\t/**\n\t * Creates an instance of the observer.\n\t *\n\t * @param {module:engine/view/view~View} view\n\t */\n\tconstructor( view ) {\n\t\t/**\n\t\t * Instance of the view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View}\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/document~Document} object.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/document~Document}\n\t\t */\n\t\tthis.document = view.document;\n\n\t\t/**\n\t\t * State of the observer. If it is disabled events will not be fired.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.isEnabled = false;\n\t}\n\n\t/**\n\t * Enables the observer. This method is called when the observer is registered to the\n\t * {@link module:engine/view/view~View} and after {@link module:engine/view/view~View#forceRender rendering}\n\t * (all observers are {@link #disable disabled} before rendering).\n\t *\n\t * A typical use case for disabling observers is that mutation observers need to be disabled for the rendering.\n\t * However, a child class may not need to be disabled, so it can implement an empty method.\n\t *\n\t * @see module:engine/view/observer/observer~Observer#disable\n\t */\n\tenable() {\n\t\tthis.isEnabled = true;\n\t}\n\n\t/**\n\t * Disables the observer. This method is called before\n\t * {@link module:engine/view/view~View#forceRender rendering} to prevent firing events during rendering.\n\t *\n\t * @see module:engine/view/observer/observer~Observer#enable\n\t */\n\tdisable() {\n\t\tthis.isEnabled = false;\n\t}\n\n\t/**\n\t * Disables and destroys the observer, among others removes event listeners created by the observer.\n\t */\n\tdestroy() {\n\t\tthis.disable();\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Starts observing the given root element.\n\t *\n\t * @method #observe\n\t * @param {HTMLElement} domElement\n\t * @param {String} name The name of the root element.\n\t */\n}\n\nmix( Observer, DomEmitterMixin );\n","/** Used to stand-in for `undefined` hash values. */\nvar HASH_UNDEFINED = '__lodash_hash_undefined__';\n\n/**\n * Adds `value` to the array cache.\n *\n * @private\n * @name add\n * @memberOf SetCache\n * @alias push\n * @param {*} value The value to cache.\n * @returns {Object} Returns the cache instance.\n */\nfunction setCacheAdd(value) {\n this.__data__.set(value, HASH_UNDEFINED);\n return this;\n}\n\nexport default setCacheAdd;\n","/**\n * Checks if `value` is in the array cache.\n *\n * @private\n * @name has\n * @memberOf SetCache\n * @param {*} value The value to search for.\n * @returns {number} Returns `true` if `value` is found, else `false`.\n */\nfunction setCacheHas(value) {\n return this.__data__.has(value);\n}\n\nexport default setCacheHas;\n","import MapCache from './_MapCache.js';\nimport setCacheAdd from './_setCacheAdd.js';\nimport setCacheHas from './_setCacheHas.js';\n\n/**\n *\n * Creates an array cache object to store unique values.\n *\n * @private\n * @constructor\n * @param {Array} [values] The values to cache.\n */\nfunction SetCache(values) {\n var index = -1,\n length = values == null ? 0 : values.length;\n\n this.__data__ = new MapCache;\n while (++index < length) {\n this.add(values[index]);\n }\n}\n\n// Add methods to `SetCache`.\nSetCache.prototype.add = SetCache.prototype.push = setCacheAdd;\nSetCache.prototype.has = setCacheHas;\n\nexport default SetCache;\n","/**\n * A specialized version of `_.some` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} [array] The array to iterate over.\n * @param {Function} predicate The function invoked per iteration.\n * @returns {boolean} Returns `true` if any element passes the predicate check,\n * else `false`.\n */\nfunction arraySome(array, predicate) {\n var index = -1,\n length = array == null ? 0 : array.length;\n\n while (++index < length) {\n if (predicate(array[index], index, array)) {\n return true;\n }\n }\n return false;\n}\n\nexport default arraySome;\n","/**\n * Checks if a `cache` value for `key` exists.\n *\n * @private\n * @param {Object} cache The cache to query.\n * @param {string} key The key of the entry to check.\n * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.\n */\nfunction cacheHas(cache, key) {\n return cache.has(key);\n}\n\nexport default cacheHas;\n","import SetCache from './_SetCache.js';\nimport arraySome from './_arraySome.js';\nimport cacheHas from './_cacheHas.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/**\n * A specialized version of `baseIsEqualDeep` for arrays with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Array} array The array to compare.\n * @param {Array} other The other array to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `array` and `other` objects.\n * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.\n */\nfunction equalArrays(array, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n arrLength = array.length,\n othLength = other.length;\n\n if (arrLength != othLength && !(isPartial && othLength > arrLength)) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(array);\n if (stacked && stack.get(other)) {\n return stacked == other;\n }\n var index = -1,\n result = true,\n seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;\n\n stack.set(array, other);\n stack.set(other, array);\n\n // Ignore non-index properties.\n while (++index < arrLength) {\n var arrValue = array[index],\n othValue = other[index];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, arrValue, index, other, array, stack)\n : customizer(arrValue, othValue, index, array, other, stack);\n }\n if (compared !== undefined) {\n if (compared) {\n continue;\n }\n result = false;\n break;\n }\n // Recursively compare arrays (susceptible to call stack limits).\n if (seen) {\n if (!arraySome(other, function(othValue, othIndex) {\n if (!cacheHas(seen, othIndex) &&\n (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {\n return seen.push(othIndex);\n }\n })) {\n result = false;\n break;\n }\n } else if (!(\n arrValue === othValue ||\n equalFunc(arrValue, othValue, bitmask, customizer, stack)\n )) {\n result = false;\n break;\n }\n }\n stack['delete'](array);\n stack['delete'](other);\n return result;\n}\n\nexport default equalArrays;\n","/**\n * Converts `map` to its key-value pairs.\n *\n * @private\n * @param {Object} map The map to convert.\n * @returns {Array} Returns the key-value pairs.\n */\nfunction mapToArray(map) {\n var index = -1,\n result = Array(map.size);\n\n map.forEach(function(value, key) {\n result[++index] = [key, value];\n });\n return result;\n}\n\nexport default mapToArray;\n","/**\n * Converts `set` to an array of its values.\n *\n * @private\n * @param {Object} set The set to convert.\n * @returns {Array} Returns the values.\n */\nfunction setToArray(set) {\n var index = -1,\n result = Array(set.size);\n\n set.forEach(function(value) {\n result[++index] = value;\n });\n return result;\n}\n\nexport default setToArray;\n","import Symbol from './_Symbol.js';\nimport Uint8Array from './_Uint8Array.js';\nimport eq from './eq.js';\nimport equalArrays from './_equalArrays.js';\nimport mapToArray from './_mapToArray.js';\nimport setToArray from './_setToArray.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1,\n COMPARE_UNORDERED_FLAG = 2;\n\n/** `Object#toString` result references. */\nvar boolTag = '[object Boolean]',\n dateTag = '[object Date]',\n errorTag = '[object Error]',\n mapTag = '[object Map]',\n numberTag = '[object Number]',\n regexpTag = '[object RegExp]',\n setTag = '[object Set]',\n stringTag = '[object String]',\n symbolTag = '[object Symbol]';\n\nvar arrayBufferTag = '[object ArrayBuffer]',\n dataViewTag = '[object DataView]';\n\n/** Used to convert symbols to primitives and strings. */\nvar symbolProto = Symbol ? Symbol.prototype : undefined,\n symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;\n\n/**\n * A specialized version of `baseIsEqualDeep` for comparing objects of\n * the same `toStringTag`.\n *\n * **Note:** This function only supports comparing values with tags of\n * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {string} tag The `toStringTag` of the objects to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {\n switch (tag) {\n case dataViewTag:\n if ((object.byteLength != other.byteLength) ||\n (object.byteOffset != other.byteOffset)) {\n return false;\n }\n object = object.buffer;\n other = other.buffer;\n\n case arrayBufferTag:\n if ((object.byteLength != other.byteLength) ||\n !equalFunc(new Uint8Array(object), new Uint8Array(other))) {\n return false;\n }\n return true;\n\n case boolTag:\n case dateTag:\n case numberTag:\n // Coerce booleans to `1` or `0` and dates to milliseconds.\n // Invalid dates are coerced to `NaN`.\n return eq(+object, +other);\n\n case errorTag:\n return object.name == other.name && object.message == other.message;\n\n case regexpTag:\n case stringTag:\n // Coerce regexes to strings and treat strings, primitives and objects,\n // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring\n // for more details.\n return object == (other + '');\n\n case mapTag:\n var convert = mapToArray;\n\n case setTag:\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG;\n convert || (convert = setToArray);\n\n if (object.size != other.size && !isPartial) {\n return false;\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked) {\n return stacked == other;\n }\n bitmask |= COMPARE_UNORDERED_FLAG;\n\n // Recursively compare objects (susceptible to call stack limits).\n stack.set(object, other);\n var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);\n stack['delete'](object);\n return result;\n\n case symbolTag:\n if (symbolValueOf) {\n return symbolValueOf.call(object) == symbolValueOf.call(other);\n }\n }\n return false;\n}\n\nexport default equalByTag;\n","import getAllKeys from './_getAllKeys.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqualDeep` for objects with support for\n * partial deep comparisons.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} stack Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction equalObjects(object, other, bitmask, customizer, equalFunc, stack) {\n var isPartial = bitmask & COMPARE_PARTIAL_FLAG,\n objProps = getAllKeys(object),\n objLength = objProps.length,\n othProps = getAllKeys(other),\n othLength = othProps.length;\n\n if (objLength != othLength && !isPartial) {\n return false;\n }\n var index = objLength;\n while (index--) {\n var key = objProps[index];\n if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {\n return false;\n }\n }\n // Assume cyclic values are equal.\n var stacked = stack.get(object);\n if (stacked && stack.get(other)) {\n return stacked == other;\n }\n var result = true;\n stack.set(object, other);\n stack.set(other, object);\n\n var skipCtor = isPartial;\n while (++index < objLength) {\n key = objProps[index];\n var objValue = object[key],\n othValue = other[key];\n\n if (customizer) {\n var compared = isPartial\n ? customizer(othValue, objValue, key, other, object, stack)\n : customizer(objValue, othValue, key, object, other, stack);\n }\n // Recursively compare objects (susceptible to call stack limits).\n if (!(compared === undefined\n ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))\n : compared\n )) {\n result = false;\n break;\n }\n skipCtor || (skipCtor = key == 'constructor');\n }\n if (result && !skipCtor) {\n var objCtor = object.constructor,\n othCtor = other.constructor;\n\n // Non `Object` object instances with different constructors are not equal.\n if (objCtor != othCtor &&\n ('constructor' in object && 'constructor' in other) &&\n !(typeof objCtor == 'function' && objCtor instanceof objCtor &&\n typeof othCtor == 'function' && othCtor instanceof othCtor)) {\n result = false;\n }\n }\n stack['delete'](object);\n stack['delete'](other);\n return result;\n}\n\nexport default equalObjects;\n","import Stack from './_Stack.js';\nimport equalArrays from './_equalArrays.js';\nimport equalByTag from './_equalByTag.js';\nimport equalObjects from './_equalObjects.js';\nimport getTag from './_getTag.js';\nimport isArray from './isArray.js';\nimport isBuffer from './isBuffer.js';\nimport isTypedArray from './isTypedArray.js';\n\n/** Used to compose bitmasks for value comparisons. */\nvar COMPARE_PARTIAL_FLAG = 1;\n\n/** `Object#toString` result references. */\nvar argsTag = '[object Arguments]',\n arrayTag = '[object Array]',\n objectTag = '[object Object]';\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/** Used to check objects for own properties. */\nvar hasOwnProperty = objectProto.hasOwnProperty;\n\n/**\n * A specialized version of `baseIsEqual` for arrays and objects which performs\n * deep comparisons and tracks traversed objects enabling objects with circular\n * references to be compared.\n *\n * @private\n * @param {Object} object The object to compare.\n * @param {Object} other The other object to compare.\n * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.\n * @param {Function} customizer The function to customize comparisons.\n * @param {Function} equalFunc The function to determine equivalents of values.\n * @param {Object} [stack] Tracks traversed `object` and `other` objects.\n * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.\n */\nfunction baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {\n var objIsArr = isArray(object),\n othIsArr = isArray(other),\n objTag = objIsArr ? arrayTag : getTag(object),\n othTag = othIsArr ? arrayTag : getTag(other);\n\n objTag = objTag == argsTag ? objectTag : objTag;\n othTag = othTag == argsTag ? objectTag : othTag;\n\n var objIsObj = objTag == objectTag,\n othIsObj = othTag == objectTag,\n isSameTag = objTag == othTag;\n\n if (isSameTag && isBuffer(object)) {\n if (!isBuffer(other)) {\n return false;\n }\n objIsArr = true;\n objIsObj = false;\n }\n if (isSameTag && !objIsObj) {\n stack || (stack = new Stack);\n return (objIsArr || isTypedArray(object))\n ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)\n : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);\n }\n if (!(bitmask & COMPARE_PARTIAL_FLAG)) {\n var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),\n othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');\n\n if (objIsWrapped || othIsWrapped) {\n var objUnwrapped = objIsWrapped ? object.value() : object,\n othUnwrapped = othIsWrapped ? other.value() : other;\n\n stack || (stack = new Stack);\n return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);\n }\n }\n if (!isSameTag) {\n return false;\n }\n stack || (stack = new Stack);\n return equalObjects(object, other, bitmask, customizer, equalFunc, stack);\n}\n\nexport default baseIsEqualDeep;\n","import baseIsEqualDeep from './_baseIsEqualDeep.js';\nimport isObjectLike from './isObjectLike.js';\n\n/**\n * The base implementation of `_.isEqual` which supports partial comparisons\n * and tracks traversed objects.\n *\n * @private\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {boolean} bitmask The bitmask flags.\n * 1 - Unordered comparison\n * 2 - Partial comparison\n * @param {Function} [customizer] The function to customize comparisons.\n * @param {Object} [stack] Tracks traversed `value` and `other` objects.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n */\nfunction baseIsEqual(value, other, bitmask, customizer, stack) {\n if (value === other) {\n return true;\n }\n if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {\n return value !== value && other !== other;\n }\n return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);\n}\n\nexport default baseIsEqual;\n","import baseIsEqual from './_baseIsEqual.js';\n\n/**\n * This method is like `_.isEqual` except that it accepts `customizer` which\n * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n * are handled by the method instead. The `customizer` is invoked with up to\n * six arguments: (objValue, othValue [, index|key, object, other, stack]).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * function isGreeting(value) {\n * return /^h(?:i|ello)$/.test(value);\n * }\n *\n * function customizer(objValue, othValue) {\n * if (isGreeting(objValue) && isGreeting(othValue)) {\n * return true;\n * }\n * }\n *\n * var array = ['hello', 'goodbye'];\n * var other = ['hi', 'goodbye'];\n *\n * _.isEqualWith(array, other, customizer);\n * // => true\n */\nfunction isEqualWith(value, other, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n var result = customizer ? customizer(value, other) : undefined;\n return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;\n}\n\nexport default isEqualWith;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/mutationobserver\n */\n\n/* globals window */\n\nimport Observer from './observer';\nimport ViewSelection from '../selection';\nimport { startsWithFiller, getDataWithoutFiller } from '../filler';\nimport { isEqualWith } from 'lodash-es';\n\n/**\n * Mutation observer class observes changes in the DOM, fires {@link module:engine/view/document~Document#event:mutations} event, mark view\n * elements as changed and call {@link module:engine/view/renderer~Renderer#render}.\n * Because all mutated nodes are marked as \"to be rendered\" and the\n * {@link module:engine/view/renderer~Renderer#render} is called, all changes will be reverted, unless the mutation will be handled by the\n * {@link module:engine/view/document~Document#event:mutations} event listener. It means user will see only handled changes, and the editor\n * will block all changes which are not handled.\n *\n * Mutation Observer also take care of reducing number of mutations which are fired. It removes duplicates and\n * mutations on elements which do not have corresponding view elements. Also\n * {@link module:engine/view/observer/mutationobserver~MutatedText text mutation} is fired only if parent element do not change child list.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class MutationObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Native mutation observer config.\n\t\t *\n\t\t * @private\n\t\t * @member {Object}\n\t\t */\n\t\tthis._config = {\n\t\t\tchildList: true,\n\t\t\tcharacterData: true,\n\t\t\tcharacterDataOldValue: true,\n\t\t\tsubtree: true\n\t\t};\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#domConverter}.\n\t\t *\n\t\t * @member {module:engine/view/domconverter~DomConverter}\n\t\t */\n\t\tthis.domConverter = view.domConverter;\n\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#_renderer}.\n\t\t *\n\t\t * @member {module:engine/view/renderer~Renderer}\n\t\t */\n\t\tthis.renderer = view._renderer;\n\n\t\t/**\n\t\t * Observed DOM elements.\n\t\t *\n\t\t * @private\n\t\t * @member {Array.}\n\t\t */\n\t\tthis._domElements = [];\n\n\t\t/**\n\t\t * Native mutation observer.\n\t\t *\n\t\t * @private\n\t\t * @member {MutationObserver}\n\t\t */\n\t\tthis._mutationObserver = new window.MutationObserver( this._onMutations.bind( this ) );\n\t}\n\n\t/**\n\t * Synchronously fires {@link module:engine/view/document~Document#event:mutations} event with all mutations in record queue.\n\t * At the same time empties the queue so mutations will not be fired twice.\n\t */\n\tflush() {\n\t\tthis._onMutations( this._mutationObserver.takeRecords() );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tthis._domElements.push( domElement );\n\n\t\tif ( this.isEnabled ) {\n\t\t\tthis._mutationObserver.observe( domElement, this._config );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tenable() {\n\t\tsuper.enable();\n\n\t\tfor ( const domElement of this._domElements ) {\n\t\t\tthis._mutationObserver.observe( domElement, this._config );\n\t\t}\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdisable() {\n\t\tsuper.disable();\n\n\t\tthis._mutationObserver.disconnect();\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._mutationObserver.disconnect();\n\t}\n\n\t/**\n\t * Handles mutations. Deduplicates, mark view elements to sync, fire event and call render.\n\t *\n\t * @private\n\t * @param {Array.} domMutations Array of native mutations.\n\t */\n\t_onMutations( domMutations ) {\n\t\t// As a result of this.flush() we can have an empty collection.\n\t\tif ( domMutations.length === 0 ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst domConverter = this.domConverter;\n\n\t\t// Use map and set for deduplication.\n\t\tconst mutatedTexts = new Map();\n\t\tconst mutatedElements = new Set();\n\n\t\t// Handle `childList` mutations first, so we will be able to check if the `characterData` mutation is in the\n\t\t// element with changed structure anyway.\n\t\tfor ( const mutation of domMutations ) {\n\t\t\tif ( mutation.type === 'childList' ) {\n\t\t\t\tconst element = domConverter.mapDomToView( mutation.target );\n\n\t\t\t\t// Do not collect mutations from UIElements.\n\t\t\t\tif ( element && element.is( 'uiElement' ) ) {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif ( element && !this._isBogusBrMutation( mutation ) ) {\n\t\t\t\t\tmutatedElements.add( element );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Handle `characterData` mutations later, when we have the full list of nodes which changed structure.\n\t\tfor ( const mutation of domMutations ) {\n\t\t\tconst element = domConverter.mapDomToView( mutation.target );\n\n\t\t\t// Do not collect mutations from UIElements.\n\t\t\tif ( element && element.is( 'uiElement' ) ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tif ( mutation.type === 'characterData' ) {\n\t\t\t\tconst text = domConverter.findCorrespondingViewText( mutation.target );\n\n\t\t\t\tif ( text && !mutatedElements.has( text.parent ) ) {\n\t\t\t\t\t// Use text as a key, for deduplication. If there will be another mutation on the same text element\n\t\t\t\t\t// we will have only one in the map.\n\t\t\t\t\tmutatedTexts.set( text, {\n\t\t\t\t\t\ttype: 'text',\n\t\t\t\t\t\toldText: text.data,\n\t\t\t\t\t\tnewText: getDataWithoutFiller( mutation.target ),\n\t\t\t\t\t\tnode: text\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t\t// When we added first letter to the text node which had only inline filler, for the DOM it is mutation\n\t\t\t\t// on text, but for the view, where filler text node did not existed, new text node was created, so we\n\t\t\t\t// need to fire 'children' mutation instead of 'text'.\n\t\t\t\telse if ( !text && startsWithFiller( mutation.target ) ) {\n\t\t\t\t\tmutatedElements.add( domConverter.mapDomToView( mutation.target.parentNode ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Now we build the list of mutations to fire and mark elements. We did not do it earlier to avoid marking the\n\t\t// same node multiple times in case of duplication.\n\n\t\t// List of mutations we will fire.\n\t\tconst viewMutations = [];\n\n\t\tfor ( const mutatedText of mutatedTexts.values() ) {\n\t\t\tthis.renderer.markToSync( 'text', mutatedText.node );\n\t\t\tviewMutations.push( mutatedText );\n\t\t}\n\n\t\tfor ( const viewElement of mutatedElements ) {\n\t\t\tconst domElement = domConverter.mapViewToDom( viewElement );\n\t\t\tconst viewChildren = Array.from( viewElement.getChildren() );\n\t\t\tconst newViewChildren = Array.from( domConverter.domChildrenToView( domElement, { withChildren: false } ) );\n\n\t\t\t// It may happen that as a result of many changes (sth was inserted and then removed),\n\t\t\t// both elements haven't really changed. #1031\n\t\t\tif ( !isEqualWith( viewChildren, newViewChildren, sameNodes ) ) {\n\t\t\t\tthis.renderer.markToSync( 'children', viewElement );\n\n\t\t\t\tviewMutations.push( {\n\t\t\t\t\ttype: 'children',\n\t\t\t\t\toldChildren: viewChildren,\n\t\t\t\t\tnewChildren: newViewChildren,\n\t\t\t\t\tnode: viewElement\n\t\t\t\t} );\n\t\t\t}\n\t\t}\n\n\t\t// Retrieve `domSelection` using `ownerDocument` of one of mutated nodes.\n\t\t// There should not be simultaneous mutation in multiple documents, so it's fine.\n\t\tconst domSelection = domMutations[ 0 ].target.ownerDocument.getSelection();\n\n\t\tlet viewSelection = null;\n\n\t\tif ( domSelection && domSelection.anchorNode ) {\n\t\t\t// If `domSelection` is inside a dom node that is already bound to a view node from view tree, get\n\t\t\t// corresponding selection in the view and pass it together with `viewMutations`. The `viewSelection` may\n\t\t\t// be used by features handling mutations.\n\t\t\t// Only one range is supported.\n\n\t\t\tconst viewSelectionAnchor = domConverter.domPositionToView( domSelection.anchorNode, domSelection.anchorOffset );\n\t\t\tconst viewSelectionFocus = domConverter.domPositionToView( domSelection.focusNode, domSelection.focusOffset );\n\n\t\t\t// Anchor and focus has to be properly mapped to view.\n\t\t\tif ( viewSelectionAnchor && viewSelectionFocus ) {\n\t\t\t\tviewSelection = new ViewSelection( viewSelectionAnchor );\n\t\t\t\tviewSelection.setFocus( viewSelectionFocus );\n\t\t\t}\n\t\t}\n\n\t\tthis.document.fire( 'mutations', viewMutations, viewSelection );\n\n\t\t// If nothing changes on `mutations` event, at this point we have \"dirty DOM\" (changed) and de-synched\n\t\t// view (which has not been changed). In order to \"reset DOM\" we render the view again.\n\t\tthis.view.forceRender();\n\n\t\tfunction sameNodes( child1, child2 ) {\n\t\t\t// First level of comparison (array of children vs array of children) – use the Lodash's default behavior.\n\t\t\tif ( Array.isArray( child1 ) ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t// Elements.\n\t\t\tif ( child1 === child2 ) {\n\t\t\t\treturn true;\n\t\t\t}\n\t\t\t// Texts.\n\t\t\telse if ( child1.is( 'text' ) && child2.is( 'text' ) ) {\n\t\t\t\treturn child1.data === child2.data;\n\t\t\t}\n\n\t\t\t// Not matching types.\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t/**\n\t * Checks if mutation was generated by the browser inserting bogus br on the end of the block element.\n\t * Such mutations are generated while pressing space or performing native spellchecker correction\n\t * on the end of the block element in Firefox browser.\n\t *\n\t * @private\n\t * @param {Object} mutation Native mutation object.\n\t * @returns {Boolean}\n\t */\n\t_isBogusBrMutation( mutation ) {\n\t\tlet addedNode = null;\n\n\t\t// Check if mutation added only one node on the end of its parent.\n\t\tif ( mutation.nextSibling === null && mutation.removedNodes.length === 0 && mutation.addedNodes.length == 1 ) {\n\t\t\taddedNode = this.domConverter.domToView( mutation.addedNodes[ 0 ], {\n\t\t\t\twithChildren: false\n\t\t\t} );\n\t\t}\n\n\t\treturn addedNode && addedNode.is( 'element', 'br' );\n\t}\n}\n\n/**\n * Fired when mutation occurred. If tree view is not changed on this event, DOM will be reverted to the state before\n * mutation, so all changes which should be applied, should be handled on this event.\n *\n * Introduced by {@link module:engine/view/observer/mutationobserver~MutationObserver}.\n *\n * Note that because {@link module:engine/view/observer/mutationobserver~MutationObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/mutationobserver~MutationObserver\n * @event module:engine/view/document~Document#event:mutations\n * @param {Array.}\n * viewMutations Array of mutations.\n * For mutated texts it will be {@link module:engine/view/observer/mutationobserver~MutatedText} and for mutated elements it will be\n * {@link module:engine/view/observer/mutationobserver~MutatedChildren}. You can recognize the type based on the `type` property.\n * @param {module:engine/view/selection~Selection|null} viewSelection View selection that is a result of converting DOM selection to view.\n * Keep in\n * mind that the DOM selection is already \"updated\", meaning that it already acknowledges changes done in mutation.\n */\n\n/**\n * Mutation item for text.\n *\n * @see module:engine/view/document~Document#event:mutations\n * @see module:engine/view/observer/mutationobserver~MutatedChildren\n *\n * @typedef {Object} module:engine/view/observer/mutationobserver~MutatedText\n *\n * @property {String} type For text mutations it is always 'text'.\n * @property {module:engine/view/text~Text} node Mutated text node.\n * @property {String} oldText Old text.\n * @property {String} newText New text.\n */\n\n/**\n * Mutation item for child nodes.\n *\n * @see module:engine/view/document~Document#event:mutations\n * @see module:engine/view/observer/mutationobserver~MutatedText\n *\n * @typedef {Object} module:engine/view/observer/mutationobserver~MutatedChildren\n *\n * @property {String} type For child nodes mutations it is always 'children'.\n * @property {module:engine/view/element~Element} node Parent of the mutated children.\n * @property {Array.} oldChildren Old child nodes.\n * @property {Array.} newChildren New child nodes.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/domeventdata\n */\n\nimport { extend } from 'lodash-es';\n\n/**\n * Information about a DOM event in context of the {@link module:engine/view/document~Document}.\n * It wraps the native event, which usually should not be used as the wrapper contains\n * additional data (like key code for keyboard events).\n */\nexport default class DomEventData {\n\t/**\n\t * @param {module:engine/view/view~View} view The instance of the view controller.\n\t * @param {Event} domEvent The DOM event.\n\t * @param {Object} [additionalData] Additional properties that the instance should contain.\n\t */\n\tconstructor( view, domEvent, additionalData ) {\n\t\t/**\n\t\t * Instance of the view controller.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/view~View} module:engine/view/observer/observer~Observer.DomEvent#view\n\t\t */\n\t\tthis.view = view;\n\n\t\t/**\n\t\t * The instance of the document.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/document~Document} module:engine/view/observer/observer~Observer.DomEvent#document\n\t\t */\n\t\tthis.document = view.document;\n\n\t\t/**\n\t\t * The DOM event.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Event} module:engine/view/observer/observer~Observer.DomEvent#domEvent\n\t\t */\n\t\tthis.domEvent = domEvent;\n\n\t\t/**\n\t\t * The DOM target.\n\t\t *\n\t\t * @readonly\n\t\t * @member {HTMLElement} module:engine/view/observer/observer~Observer.DomEvent#target\n\t\t */\n\t\tthis.domTarget = domEvent.target;\n\n\t\textend( this, additionalData );\n\t}\n\n\t/**\n\t * The tree view element representing the target.\n\t *\n\t * @readonly\n\t * @type module:engine/view/element~Element\n\t */\n\tget target() {\n\t\treturn this.view.domConverter.mapDomToView( this.domTarget );\n\t}\n\n\t/**\n\t * Prevents the native's event default action.\n\t */\n\tpreventDefault() {\n\t\tthis.domEvent.preventDefault();\n\t}\n\n\t/**\n\t * Stops native event propagation.\n\t */\n\tstopPropagation() {\n\t\tthis.domEvent.stopPropagation();\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/domeventobserver\n */\n\nimport Observer from './observer';\nimport DomEventData from './domeventdata';\n\n/**\n * Base class for DOM event observers. This class handles\n * {@link module:engine/view/observer/observer~Observer#observe adding} listeners to DOM elements,\n * {@link module:engine/view/observer/observer~Observer#disable disabling} and\n * {@link module:engine/view/observer/observer~Observer#enable re-enabling} events.\n * Child class needs to define\n * {@link module:engine/view/observer/domeventobserver~DomEventObserver#domEventType DOM event type} and\n * {@link module:engine/view/observer/domeventobserver~DomEventObserver#onDomEvent callback}.\n *\n * For instance:\n *\n *\t\tclass ClickObserver extends DomEventObserver {\n *\t\t\t// It can also be defined as a normal property in the constructor.\n *\t\t\tget domEventType() {\n *\t\t\t\treturn 'click';\n *\t\t\t}\n *\n *\t\t\tonDomEvent( domEvent ) {\n *\t\t\t\tthis.fire( 'click', domEvent );\n *\t\t\t}\n *\t\t}\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class DomEventObserver extends Observer {\n\t/**\n\t * Type of the DOM event the observer should listen on. Array of types can be defined\n\t * if the obsever should listen to multiple DOM events.\n\t *\n\t * @readonly\n\t * @member {String|Array.} #domEventType\n\t */\n\n\t/**\n\t * Callback which should be called when the DOM event occurred. Note that the callback will not be called if\n\t * observer {@link #isEnabled is not enabled}.\n\t *\n\t * @see #domEventType\n\t * @abstract\n\t * @method #onDomEvent\n\t */\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * If set to `true` DOM events will be listened on the capturing phase.\n\t\t * Default value is `false`.\n\t\t *\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis.useCapture = false;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tconst types = typeof this.domEventType == 'string' ? [ this.domEventType ] : this.domEventType;\n\n\t\ttypes.forEach( type => {\n\t\t\tthis.listenTo( domElement, type, ( eventInfo, domEvent ) => {\n\t\t\t\tif ( this.isEnabled ) {\n\t\t\t\t\tthis.onDomEvent( domEvent );\n\t\t\t\t}\n\t\t\t}, { useCapture: this.useCapture } );\n\t\t} );\n\t}\n\n\t/**\n\t * Calls `Document#fire()` if observer {@link #isEnabled is enabled}.\n\t *\n\t * @see module:utils/emittermixin~EmitterMixin#fire\n\t * @param {String} eventType The event type (name).\n\t * @param {Event} domEvent The DOM event.\n\t * @param {Object} [additionalData] The additional data which should extend the\n\t * {@link module:engine/view/observer/domeventdata~DomEventData event data} object.\n\t */\n\tfire( eventType, domEvent, additionalData ) {\n\t\tif ( this.isEnabled ) {\n\t\t\tthis.document.fire( eventType, new DomEventData( this.view, domEvent, additionalData ) );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/keyobserver\n */\n\nimport DomEventObserver from './domeventobserver';\nimport { getCode } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * Observer for events connected with pressing keyboard keys.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class KeyObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'keydown', 'keyup' ];\n\t}\n\n\tonDomEvent( domEvt ) {\n\t\tthis.fire( domEvt.type, domEvt, {\n\t\t\tkeyCode: domEvt.keyCode,\n\n\t\t\taltKey: domEvt.altKey,\n\t\t\tctrlKey: domEvt.ctrlKey || domEvt.metaKey,\n\t\t\tshiftKey: domEvt.shiftKey,\n\n\t\t\tget keystroke() {\n\t\t\t\treturn getCode( this );\n\t\t\t}\n\t\t} );\n\t}\n}\n\n/**\n * Fired when a key has been pressed.\n *\n * Introduced by {@link module:engine/view/observer/keyobserver~KeyObserver}.\n *\n * Note that because {@link module:engine/view/observer/keyobserver~KeyObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/keyobserver~KeyObserver\n * @event module:engine/view/document~Document#event:keydown\n * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEventData\n */\n\n/**\n * Fired when a key has been released.\n *\n * Introduced by {@link module:engine/view/observer/keyobserver~KeyObserver}.\n *\n * Note that because {@link module:engine/view/observer/keyobserver~KeyObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/keyobserver~KeyObserver\n * @event module:engine/view/document~Document#event:keyup\n * @param {module:engine/view/observer/keyobserver~KeyEventData} keyEventData\n */\n\n/**\n * The value of both events - {@link module:engine/view/document~Document#event:keydown} and\n * {@link module:engine/view/document~Document#event:keyup}.\n *\n * @class module:engine/view/observer/keyobserver~KeyEventData\n * @extends module:engine/view/observer/domeventdata~DomEventData\n * @implements module:utils/keyboard~KeystrokeInfo\n */\n\n/**\n * Code of the whole keystroke. See {@link module:utils/keyboard~getCode}.\n *\n * @readonly\n * @member {Number} module:engine/view/observer/keyobserver~KeyEventData#keystroke\n */\n","import root from './_root.js';\n\n/**\n * Gets the timestamp of the number of milliseconds that have elapsed since\n * the Unix epoch (1 January 1970 00:00:00 UTC).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Date\n * @returns {number} Returns the timestamp.\n * @example\n *\n * _.defer(function(stamp) {\n * console.log(_.now() - stamp);\n * }, _.now());\n * // => Logs the number of milliseconds it took for the deferred invocation.\n */\nvar now = function() {\n return root.Date.now();\n};\n\nexport default now;\n","import baseGetTag from './_baseGetTag.js';\nimport isObjectLike from './isObjectLike.js';\n\n/** `Object#toString` result references. */\nvar symbolTag = '[object Symbol]';\n\n/**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\nfunction isSymbol(value) {\n return typeof value == 'symbol' ||\n (isObjectLike(value) && baseGetTag(value) == symbolTag);\n}\n\nexport default isSymbol;\n","import isObject from './isObject.js';\nimport isSymbol from './isSymbol.js';\n\n/** Used as references for various `Number` constants. */\nvar NAN = 0 / 0;\n\n/** Used to match leading and trailing whitespace. */\nvar reTrim = /^\\s+|\\s+$/g;\n\n/** Used to detect bad signed hexadecimal string values. */\nvar reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n/** Used to detect binary string values. */\nvar reIsBinary = /^0b[01]+$/i;\n\n/** Used to detect octal string values. */\nvar reIsOctal = /^0o[0-7]+$/i;\n\n/** Built-in method references without a dependency on `root`. */\nvar freeParseInt = parseInt;\n\n/**\n * Converts `value` to a number.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n * @example\n *\n * _.toNumber(3.2);\n * // => 3.2\n *\n * _.toNumber(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toNumber(Infinity);\n * // => Infinity\n *\n * _.toNumber('3.2');\n * // => 3.2\n */\nfunction toNumber(value) {\n if (typeof value == 'number') {\n return value;\n }\n if (isSymbol(value)) {\n return NAN;\n }\n if (isObject(value)) {\n var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n value = isObject(other) ? (other + '') : other;\n }\n if (typeof value != 'string') {\n return value === 0 ? value : +value;\n }\n value = value.replace(reTrim, '');\n var isBinary = reIsBinary.test(value);\n return (isBinary || reIsOctal.test(value))\n ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n : (reIsBadHex.test(value) ? NAN : +value);\n}\n\nexport default toNumber;\n","import isObject from './isObject.js';\nimport now from './now.js';\nimport toNumber from './toNumber.js';\n\n/** Error message constants. */\nvar FUNC_ERROR_TEXT = 'Expected a function';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeMax = Math.max,\n nativeMin = Math.min;\n\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked. The debounced function comes with a `cancel` method to cancel\n * delayed `func` invocations and a `flush` method to immediately invoke them.\n * Provide `options` to indicate whether `func` should be invoked on the\n * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n * with the last arguments provided to the debounced function. Subsequent\n * calls to the debounced function return the result of the last `func`\n * invocation.\n *\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\n * invoked on the trailing edge of the timeout only if the debounced function\n * is invoked more than once during the `wait` timeout.\n *\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n *\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n * for details over the differences between `_.debounce` and `_.throttle`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to debounce.\n * @param {number} [wait=0] The number of milliseconds to delay.\n * @param {Object} [options={}] The options object.\n * @param {boolean} [options.leading=false]\n * Specify invoking on the leading edge of the timeout.\n * @param {number} [options.maxWait]\n * The maximum time `func` is allowed to be delayed before it's invoked.\n * @param {boolean} [options.trailing=true]\n * Specify invoking on the trailing edge of the timeout.\n * @returns {Function} Returns the new debounced function.\n * @example\n *\n * // Avoid costly calculations while the window size is in flux.\n * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n *\n * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n * jQuery(element).on('click', _.debounce(sendMail, 300, {\n * 'leading': true,\n * 'trailing': false\n * }));\n *\n * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n * var source = new EventSource('/stream');\n * jQuery(source).on('message', debounced);\n *\n * // Cancel the trailing debounced invocation.\n * jQuery(window).on('popstate', debounced.cancel);\n */\nfunction debounce(func, wait, options) {\n var lastArgs,\n lastThis,\n maxWait,\n result,\n timerId,\n lastCallTime,\n lastInvokeTime = 0,\n leading = false,\n maxing = false,\n trailing = true;\n\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n wait = toNumber(wait) || 0;\n if (isObject(options)) {\n leading = !!options.leading;\n maxing = 'maxWait' in options;\n maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n trailing = 'trailing' in options ? !!options.trailing : trailing;\n }\n\n function invokeFunc(time) {\n var args = lastArgs,\n thisArg = lastThis;\n\n lastArgs = lastThis = undefined;\n lastInvokeTime = time;\n result = func.apply(thisArg, args);\n return result;\n }\n\n function leadingEdge(time) {\n // Reset any `maxWait` timer.\n lastInvokeTime = time;\n // Start the timer for the trailing edge.\n timerId = setTimeout(timerExpired, wait);\n // Invoke the leading edge.\n return leading ? invokeFunc(time) : result;\n }\n\n function remainingWait(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime,\n timeWaiting = wait - timeSinceLastCall;\n\n return maxing\n ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)\n : timeWaiting;\n }\n\n function shouldInvoke(time) {\n var timeSinceLastCall = time - lastCallTime,\n timeSinceLastInvoke = time - lastInvokeTime;\n\n // Either this is the first call, activity has stopped and we're at the\n // trailing edge, the system time has gone backwards and we're treating\n // it as the trailing edge, or we've hit the `maxWait` limit.\n return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\n (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\n }\n\n function timerExpired() {\n var time = now();\n if (shouldInvoke(time)) {\n return trailingEdge(time);\n }\n // Restart the timer.\n timerId = setTimeout(timerExpired, remainingWait(time));\n }\n\n function trailingEdge(time) {\n timerId = undefined;\n\n // Only invoke if we have `lastArgs` which means `func` has been\n // debounced at least once.\n if (trailing && lastArgs) {\n return invokeFunc(time);\n }\n lastArgs = lastThis = undefined;\n return result;\n }\n\n function cancel() {\n if (timerId !== undefined) {\n clearTimeout(timerId);\n }\n lastInvokeTime = 0;\n lastArgs = lastCallTime = lastThis = timerId = undefined;\n }\n\n function flush() {\n return timerId === undefined ? result : trailingEdge(now());\n }\n\n function debounced() {\n var time = now(),\n isInvoking = shouldInvoke(time);\n\n lastArgs = arguments;\n lastThis = this;\n lastCallTime = time;\n\n if (isInvoking) {\n if (timerId === undefined) {\n return leadingEdge(lastCallTime);\n }\n if (maxing) {\n // Handle invocations in a tight loop.\n clearTimeout(timerId);\n timerId = setTimeout(timerExpired, wait);\n return invokeFunc(lastCallTime);\n }\n }\n if (timerId === undefined) {\n timerId = setTimeout(timerExpired, wait);\n }\n return result;\n }\n debounced.cancel = cancel;\n debounced.flush = flush;\n return debounced;\n}\n\nexport default debounce;\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/fakeselectionobserver\n */\n\nimport Observer from './observer';\nimport ViewSelection from '../selection';\nimport { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';\nimport { debounce } from 'lodash-es';\n\n/**\n * Fake selection observer class. If view selection is fake it is placed in dummy DOM container. This observer listens\n * on {@link module:engine/view/document~Document#event:keydown keydown} events and handles moving fake view selection to the correct place\n * if arrow keys are pressed.\n * Fires {@link module:engine/view/document~Document#event:selectionChange selectionChange event} simulating natural behaviour of\n * {@link module:engine/view/observer/selectionobserver~SelectionObserver SelectionObserver}.\n *\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class FakeSelectionObserver extends Observer {\n\t/**\n\t * Creates new FakeSelectionObserver instance.\n\t *\n\t * @param {module:engine/view/view~View} view\n\t */\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Fires debounced event `selectionChangeDone`. It uses `lodash#debounce` method to delay function call.\n\t\t *\n\t\t * @private\n\t\t * @param {Object} data Selection change data.\n\t\t * @method #_fireSelectionChangeDoneDebounced\n\t\t */\n\t\tthis._fireSelectionChangeDoneDebounced = debounce( data => this.document.fire( 'selectionChangeDone', data ), 200 );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve() {\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'keydown', ( eventInfo, data ) => {\n\t\t\tconst selection = document.selection;\n\n\t\t\tif ( selection.isFake && _isArrowKeyCode( data.keyCode ) && this.isEnabled ) {\n\t\t\t\t// Prevents default key down handling - no selection change will occur.\n\t\t\t\tdata.preventDefault();\n\n\t\t\t\tthis._handleSelectionMove( data.keyCode );\n\t\t\t}\n\t\t}, { priority: 'lowest' } );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tthis._fireSelectionChangeDoneDebounced.cancel();\n\t}\n\n\t/**\n\t * Handles collapsing view selection according to given key code. If left or up key is provided - new selection will be\n\t * collapsed to left. If right or down key is pressed - new selection will be collapsed to right.\n\t *\n\t * This method fires {@link module:engine/view/document~Document#event:selectionChange} and\n\t * {@link module:engine/view/document~Document#event:selectionChangeDone} events imitating behaviour of\n\t * {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n\t *\n\t * @private\n\t * @param {Number} keyCode\n\t * @fires module:engine/view/document~Document#event:selectionChange\n\t * @fires module:engine/view/document~Document#event:selectionChangeDone\n\t */\n\t_handleSelectionMove( keyCode ) {\n\t\tconst selection = this.document.selection;\n\t\tconst newSelection = new ViewSelection( selection.getRanges(), { backward: selection.isBackward, fake: false } );\n\n\t\t// Left or up arrow pressed - move selection to start.\n\t\tif ( keyCode == keyCodes.arrowleft || keyCode == keyCodes.arrowup ) {\n\t\t\tnewSelection.setTo( newSelection.getFirstPosition() );\n\t\t}\n\n\t\t// Right or down arrow pressed - move selection to end.\n\t\tif ( keyCode == keyCodes.arrowright || keyCode == keyCodes.arrowdown ) {\n\t\t\tnewSelection.setTo( newSelection.getLastPosition() );\n\t\t}\n\n\t\tconst data = {\n\t\t\toldSelection: selection,\n\t\t\tnewSelection,\n\t\t\tdomSelection: null\n\t\t};\n\n\t\t// Fire dummy selection change event.\n\t\tthis.document.fire( 'selectionChange', data );\n\n\t\t// Call` #_fireSelectionChangeDoneDebounced` every time when `selectionChange` event is fired.\n\t\t// This function is debounced what means that `selectionChangeDone` event will be fired only when\n\t\t// defined int the function time will elapse since the last time the function was called.\n\t\t// So `selectionChangeDone` will be fired when selection will stop changing.\n\t\tthis._fireSelectionChangeDoneDebounced( data );\n\t}\n}\n\n// Checks if one of the arrow keys is pressed.\n//\n// @private\n// @param {Number} keyCode\n// @returns {Boolean}\nfunction _isArrowKeyCode( keyCode ) {\n\treturn keyCode == keyCodes.arrowright ||\n\t\tkeyCode == keyCodes.arrowleft ||\n\t\tkeyCode == keyCodes.arrowup ||\n\t\tkeyCode == keyCodes.arrowdown;\n}\n\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/selectionobserver\n */\n\n/* global setInterval, clearInterval */\n\nimport Observer from './observer';\nimport MutationObserver from './mutationobserver';\nimport { debounce } from 'lodash-es';\n\n/**\n * Selection observer class observes selection changes in the document. If selection changes on the document this\n * observer checks if there are any mutations and if DOM selection is different than the\n * {@link module:engine/view/document~Document#selection view selection}. Selection observer fires\n * {@link module:engine/view/document~Document#event:selectionChange} event only if selection change was the only change in the document\n * and DOM selection is different then the view selection.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @see module:engine/view/observer/mutationobserver~MutationObserver\n * @extends module:engine/view/observer/observer~Observer\n */\nexport default class SelectionObserver extends Observer {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\t/**\n\t\t * Instance of the mutation observer. Selection observer calls\n\t\t * {@link module:engine/view/observer/mutationobserver~MutationObserver#flush} to ensure that the mutations will be handled\n\t\t * before the {@link module:engine/view/document~Document#event:selectionChange} event is fired.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/observer/mutationobserver~MutationObserver}\n\t\t * module:engine/view/observer/selectionobserver~SelectionObserver#mutationObserver\n\t\t */\n\t\tthis.mutationObserver = view.getObserver( MutationObserver );\n\n\t\t/**\n\t\t * Reference to the view {@link module:engine/view/documentselection~DocumentSelection} object used to compare\n\t\t * new selection with it.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/documentselection~DocumentSelection}\n\t\t * module:engine/view/observer/selectionobserver~SelectionObserver#selection\n\t\t */\n\t\tthis.selection = this.document.selection;\n\n\t\t/* eslint-disable max-len */\n\t\t/**\n\t\t * Reference to the {@link module:engine/view/view~View#domConverter}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/view/domconverter~DomConverter} module:engine/view/observer/selectionobserver~SelectionObserver#domConverter\n\t\t */\n\t\t/* eslint-enable max-len */\n\t\tthis.domConverter = view.domConverter;\n\n\t\t/**\n\t\t * Set of documents which have added \"selectionchange\" listener to avoid adding listener twice to the same\n\t\t * document.\n\t\t *\n\t\t * @private\n\t\t * @member {WeakSet.} module:engine/view/observer/selectionobserver~SelectionObserver#_documents\n\t\t */\n\t\tthis._documents = new WeakSet();\n\n\t\t/**\n\t\t * Fires debounced event `selectionChangeDone`. It uses `lodash#debounce` method to delay function call.\n\t\t *\n\t\t * @private\n\t\t * @param {Object} data Selection change data.\n\t\t * @method #_fireSelectionChangeDoneDebounced\n\t\t */\n\t\tthis._fireSelectionChangeDoneDebounced = debounce( data => this.document.fire( 'selectionChangeDone', data ), 200 );\n\n\t\tthis._clearInfiniteLoopInterval = setInterval( () => this._clearInfiniteLoop(), 1000 );\n\n\t\t/**\n\t\t * Private property to check if the code does not enter infinite loop.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} module:engine/view/observer/selectionobserver~SelectionObserver#_loopbackCounter\n\t\t */\n\t\tthis._loopbackCounter = 0;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tobserve( domElement ) {\n\t\tconst domDocument = domElement.ownerDocument;\n\n\t\t// Add listener once per each document.\n\t\tif ( this._documents.has( domDocument ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tthis.listenTo( domDocument, 'selectionchange', () => {\n\t\t\tthis._handleSelectionChange( domDocument );\n\t\t} );\n\n\t\tthis._documents.add( domDocument );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tsuper.destroy();\n\n\t\tclearInterval( this._clearInfiniteLoopInterval );\n\t\tthis._fireSelectionChangeDoneDebounced.cancel();\n\t}\n\n\t/**\n\t * Selection change listener. {@link module:engine/view/observer/mutationobserver~MutationObserver#flush Flush} mutations, check if\n\t * selection changes and fires {@link module:engine/view/document~Document#event:selectionChange} event on every change\n\t * and {@link module:engine/view/document~Document#event:selectionChangeDone} when selection stop changing.\n\t *\n\t * @private\n\t * @param {Document} domDocument DOM document.\n\t */\n\t_handleSelectionChange( domDocument ) {\n\t\t// Selection is handled when document is not focused but is read-only. This is because in read-only\n\t\t// mode contenteditable is set as false and editor won't receive focus but we still need to know\n\t\t// selection position.\n\t\tif ( !this.isEnabled || ( !this.document.isFocused && !this.document.isReadOnly ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Ensure the mutation event will be before selection event on all browsers.\n\t\tthis.mutationObserver.flush();\n\n\t\t// If there were mutations then the view will be re-rendered by the mutation observer and selection\n\t\t// will be updated, so selections will equal and event will not be fired, as expected.\n\t\tconst domSelection = domDocument.defaultView.getSelection();\n\t\tconst newViewSelection = this.domConverter.domSelectionToView( domSelection );\n\n\t\tif ( this.selection.isEqual( newViewSelection ) && this.domConverter.isDomSelectionCorrect( domSelection ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Ensure we are not in the infinite loop (#400).\n\t\t// This counter is reset each second. 60 selection changes in 1 second is enough high number\n\t\t// to be very difficult (impossible) to achieve using just keyboard keys (during normal editor use).\n\t\tif ( ++this._loopbackCounter > 60 ) {\n\t\t\t// Selection change observer detected an infinite rendering loop.\n\t\t\t// Most probably you try to put the selection in the position which is not allowed\n\t\t\t// by the browser and browser fixes it automatically what causes `selectionchange` event on\n\t\t\t// which a loopback through a model tries to re-render the wrong selection and again.\n\t\t\t//\n\t\t\t// @if CK_DEBUG // console.warn( 'Selection change observer detected an infinite rendering loop.' );\n\n\t\t\treturn;\n\t\t}\n\n\t\tif ( this.selection.isSimilar( newViewSelection ) ) {\n\t\t\t// If selection was equal and we are at this point of algorithm, it means that it was incorrect.\n\t\t\t// Just re-render it, no need to fire any events, etc.\n\t\t\tthis.view.forceRender();\n\t\t} else {\n\t\t\tconst data = {\n\t\t\t\toldSelection: this.selection,\n\t\t\t\tnewSelection: newViewSelection,\n\t\t\t\tdomSelection\n\t\t\t};\n\n\t\t\t// Prepare data for new selection and fire appropriate events.\n\t\t\tthis.document.fire( 'selectionChange', data );\n\n\t\t\t// Call` #_fireSelectionChangeDoneDebounced` every time when `selectionChange` event is fired.\n\t\t\t// This function is debounced what means that `selectionChangeDone` event will be fired only when\n\t\t\t// defined int the function time will elapse since the last time the function was called.\n\t\t\t// So `selectionChangeDone` will be fired when selection will stop changing.\n\t\t\tthis._fireSelectionChangeDoneDebounced( data );\n\t\t}\n\t}\n\n\t/**\n\t * Clears `SelectionObserver` internal properties connected with preventing infinite loop.\n\t *\n\t * @protected\n\t */\n\t_clearInfiniteLoop() {\n\t\tthis._loopbackCounter = 0;\n\t}\n}\n\n/**\n * Fired when selection has changed. This event is fired only when the selection change was the only change that happened\n * in the document, and old selection is different then the new selection.\n *\n * Introduced by {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n *\n * Note that because {@link module:engine/view/observer/selectionobserver~SelectionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/selectionobserver~SelectionObserver\n * @event module:engine/view/document~Document#event:selectionChange\n * @param {Object} data\n * @param {module:engine/view/documentselection~DocumentSelection} data.oldSelection Old View selection which is\n * {@link module:engine/view/document~Document#selection}.\n * @param {module:engine/view/selection~Selection} data.newSelection New View selection which is converted DOM selection.\n * @param {Selection} data.domSelection Native DOM selection.\n */\n\n/**\n * Fired when selection stops changing.\n *\n * Introduced by {@link module:engine/view/observer/selectionobserver~SelectionObserver}.\n *\n * Note that because {@link module:engine/view/observer/selectionobserver~SelectionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/selectionobserver~SelectionObserver\n * @event module:engine/view/document~Document#event:selectionChangeDone\n * @param {Object} data\n * @param {module:engine/view/documentselection~DocumentSelection} data.oldSelection Old View selection which is\n * {@link module:engine/view/document~Document#selection}.\n * @param {module:engine/view/selection~Selection} data.newSelection New View selection which is converted DOM selection.\n * @param {Selection} data.domSelection Native DOM selection.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/focusobserver\n */\n\n/* globals setTimeout, clearTimeout */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:focus Focus}\n * and {@link module:engine/view/document~Document#event:blur blur} events observer.\n * Focus observer handle also {@link module:engine/view/rooteditableelement~RootEditableElement#isFocused isFocused} property of the\n * {@link module:engine/view/rooteditableelement~RootEditableElement root elements}.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class FocusObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'focus', 'blur' ];\n\t\tthis.useCapture = true;\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'focus', () => {\n\t\t\tdocument.isFocused = true;\n\n\t\t\t// Unfortunately native `selectionchange` event is fired asynchronously.\n\t\t\t// We need to wait until `SelectionObserver` handle the event and then render. Otherwise rendering will\n\t\t\t// overwrite new DOM selection with selection from the view.\n\t\t\t// See https://github.com/ckeditor/ckeditor5-engine/issues/795 for more details.\n\t\t\t// Long timeout is needed to solve #676 and https://github.com/ckeditor/ckeditor5-engine/issues/1157 issues.\n\t\t\tthis._renderTimeoutId = setTimeout( () => view.forceRender(), 50 );\n\t\t} );\n\n\t\tdocument.on( 'blur', ( evt, data ) => {\n\t\t\tconst selectedEditable = document.selection.editableElement;\n\n\t\t\tif ( selectedEditable === null || selectedEditable === data.target ) {\n\t\t\t\tdocument.isFocused = false;\n\n\t\t\t\t// Re-render the document to update view elements.\n\t\t\t\tview.forceRender();\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * Identifier of the timeout currently used by focus listener to delay rendering execution.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} #_renderTimeoutId\n\t\t */\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tif ( this._renderTimeoutId ) {\n\t\t\tclearTimeout( this._renderTimeoutId );\n\t\t}\n\n\t\tsuper.destroy();\n\t}\n}\n\n/**\n * Fired when one of the editables gets focus.\n *\n * Introduced by {@link module:engine/view/observer/focusobserver~FocusObserver}.\n *\n * Note that because {@link module:engine/view/observer/focusobserver~FocusObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/focusobserver~FocusObserver\n * @event module:engine/view/document~Document#event:focus\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when one of the editables loses focus.\n *\n * Introduced by {@link module:engine/view/observer/focusobserver~FocusObserver}.\n *\n * Note that because {@link module:engine/view/observer/focusobserver~FocusObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/focusobserver~FocusObserver\n * @event module:engine/view/document~Document#event:blur\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module engine/view/observer/compositionobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * {@link module:engine/view/document~Document#event:compositionstart Compositionstart},\n * {@link module:engine/view/document~Document#event:compositionupdate compositionupdate} and\n * {@link module:engine/view/document~Document#event:compositionend compositionend} events observer.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class CompositionObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'compositionstart', 'compositionupdate', 'compositionend' ];\n\t\tconst document = this.document;\n\n\t\tdocument.on( 'compositionstart', () => {\n\t\t\tdocument.isComposing = true;\n\t\t} );\n\n\t\tdocument.on( 'compositionend', () => {\n\t\t\tdocument.isComposing = false;\n\t\t} );\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired when composition starts inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionstart\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when composition is updated inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionupdate\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n\n/**\n * Fired when composition ends inside one of the editables.\n *\n * Introduced by {@link module:engine/view/observer/compositionobserver~CompositionObserver}.\n *\n * Note that because {@link module:engine/view/observer/compositionobserver~CompositionObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/compositionobserver~CompositionObserver\n * @event module:engine/view/document~Document#event:compositionend\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/view/observer/inputobserver\n */\n\nimport DomEventObserver from './domeventobserver';\n\n/**\n * Observer for events connected with data input.\n *\n * Note that this observer is attached by the {@link module:engine/view/view~View} and is available by default.\n *\n * @extends module:engine/view/observer/domeventobserver~DomEventObserver\n */\nexport default class InputObserver extends DomEventObserver {\n\tconstructor( view ) {\n\t\tsuper( view );\n\n\t\tthis.domEventType = [ 'beforeinput' ];\n\t}\n\n\tonDomEvent( domEvent ) {\n\t\tthis.fire( domEvent.type, domEvent );\n\t}\n}\n\n/**\n * Fired before browser inputs (or deletes) some data.\n *\n * This event is available only on browsers which support DOM `beforeinput` event.\n *\n * Introduced by {@link module:engine/view/observer/inputobserver~InputObserver}.\n *\n * Note that because {@link module:engine/view/observer/inputobserver~InputObserver} is attached by the\n * {@link module:engine/view/view~View} this event is available by default.\n *\n * @see module:engine/view/observer/inputobserver~InputObserver\n * @event module:engine/view/document~Document#event:beforeinput\n * @param {module:engine/view/observer/domeventdata~DomEventData} data Event data.\n */\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/isrange\n */\n\n/**\n * Checks if the object is a native DOM Range.\n *\n * @param {*} obj\n * @returns {Boolean}\n */\nexport default function isRange( obj ) {\n\treturn Object.prototype.toString.apply( obj ) == '[object Range]';\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/getborderwidths\n */\n\n/**\n * Returns an object containing CSS border widths of a specified HTML element.\n *\n * @param {HTMLElement} element An element which has CSS borders.\n * @returns {Object} An object containing `top`, `left`, `right` and `bottom` properties\n * with numerical values of the `border-[top,left,right,bottom]-width` CSS styles.\n */\nexport default function getBorderWidths( element ) {\n\t// Call getComputedStyle on the window the element document belongs to.\n\tconst style = element.ownerDocument.defaultView.getComputedStyle( element );\n\n\treturn {\n\t\ttop: parseInt( style.borderTopWidth, 10 ),\n\t\tright: parseInt( style.borderRightWidth, 10 ),\n\t\tbottom: parseInt( style.borderBottomWidth, 10 ),\n\t\tleft: parseInt( style.borderLeftWidth, 10 )\n\t};\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/rect\n */\n\nimport isRange from './isrange';\nimport isWindow from './iswindow';\nimport getBorderWidths from './getborderwidths';\nimport isText from './istext';\nimport { isElement } from 'lodash-es';\n\nconst rectProperties = [ 'top', 'right', 'bottom', 'left', 'width', 'height' ];\n\n/**\n * A helper class representing a `ClientRect` object, e.g. value returned by\n * the native `object.getBoundingClientRect()` method. Provides a set of methods\n * to manipulate the rect and compare it against other rect instances.\n */\nexport default class Rect {\n\t/**\n\t * Creates an instance of rect.\n\t *\n\t *\t\t// Rect of an HTMLElement.\n\t *\t\tconst rectA = new Rect( document.body );\n\t *\n\t *\t\t// Rect of a DOM Range.\n\t *\t\tconst rectB = new Rect( document.getSelection().getRangeAt( 0 ) );\n\t *\n\t *\t\t// Rect of a window (web browser viewport).\n\t *\t\tconst rectC = new Rect( window );\n\t *\n\t *\t\t// Rect out of an object.\n\t *\t\tconst rectD = new Rect( { top: 0, right: 10, bottom: 10, left: 0, width: 10, height: 10 } );\n\t *\n\t *\t\t// Rect out of another Rect instance.\n\t *\t\tconst rectE = new Rect( rectD );\n\t *\n\t *\t\t// Rect out of a ClientRect.\n\t *\t\tconst rectF = new Rect( document.body.getClientRects().item( 0 ) );\n\t *\n\t * **Note**: By default a rect of an HTML element includes its CSS borders and scrollbars (if any)\n\t * ant the rect of a `window` includes scrollbars too. Use {@link #excludeScrollbarsAndBorders}\n\t * to get the inner part of the rect.\n\t *\n\t * @param {HTMLElement|Range|Window|ClientRect|module:utils/dom/rect~Rect|Object} source A source object to create the rect.\n\t */\n\tconstructor( source ) {\n\t\tconst isSourceRange = isRange( source );\n\n\t\t/**\n\t\t * The object this rect is for.\n\t\t *\n\t\t * @protected\n\t\t * @readonly\n\t\t * @member {HTMLElement|Range|ClientRect|module:utils/dom/rect~Rect|Object} #_source\n\t\t */\n\t\tObject.defineProperty( this, '_source', {\n\t\t\t// If the source is a Rect instance, copy it's #_source.\n\t\t\tvalue: source._source || source,\n\t\t\twritable: true,\n\t\t\tenumerable: false\n\t\t} );\n\n\t\tif ( isElement( source ) || isSourceRange ) {\n\t\t\t// The `Rect` class depends on `getBoundingClientRect` and `getClientRects` DOM methods. If the source\n\t\t\t// of a rect in an HTML element or a DOM range but it does not belong to any rendered DOM tree, these methods\n\t\t\t// will fail to obtain the geometry and the rect instance makes little sense to the features using it.\n\t\t\t// To get rid of this warning make sure the source passed to the constructor is a descendant of `window.document.body`.\n\t\t\t// @if CK_DEBUG // const sourceNode = isSourceRange ? source.startContainer : source;\n\t\t\t// @if CK_DEBUG // if ( !sourceNode.ownerDocument || !sourceNode.ownerDocument.body.contains( sourceNode ) ) {\n\t\t\t// @if CK_DEBUG // \tconsole.warn(\n\t\t\t// @if CK_DEBUG // \t\t'rect-source-not-in-dom: The source of this rect does not belong to any rendered DOM tree.',\n\t\t\t// @if CK_DEBUG // \t\t{ source } );\n\t\t\t// @if CK_DEBUG // }\n\n\t\t\tif ( isSourceRange ) {\n\t\t\t\tcopyRectProperties( this, Rect.getDomRangeRects( source )[ 0 ] );\n\t\t\t} else {\n\t\t\t\tcopyRectProperties( this, source.getBoundingClientRect() );\n\t\t\t}\n\t\t} else if ( isWindow( source ) ) {\n\t\t\tconst { innerWidth, innerHeight } = source;\n\n\t\t\tcopyRectProperties( this, {\n\t\t\t\ttop: 0,\n\t\t\t\tright: innerWidth,\n\t\t\t\tbottom: innerHeight,\n\t\t\t\tleft: 0,\n\t\t\t\twidth: innerWidth,\n\t\t\t\theight: innerHeight\n\t\t\t} );\n\t\t} else {\n\t\t\tcopyRectProperties( this, source );\n\t\t}\n\n\t\t/**\n\t\t * The \"top\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #top\n\t\t */\n\n\t\t/**\n\t\t * The \"right\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #right\n\t\t */\n\n\t\t/**\n\t\t * The \"bottom\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #bottom\n\t\t */\n\n\t\t/**\n\t\t * The \"left\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #left\n\t\t */\n\n\t\t/**\n\t\t * The \"width\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #width\n\t\t */\n\n\t\t/**\n\t\t * The \"height\" value of the rect.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Number} #height\n\t\t */\n\t}\n\n\t/**\n\t * Returns a clone of the rect.\n\t *\n\t * @returns {module:utils/dom/rect~Rect} A cloned rect.\n\t */\n\tclone() {\n\t\treturn new Rect( this );\n\t}\n\n\t/**\n\t * Moves the rect so that its upper–left corner lands in desired `[ x, y ]` location.\n\t *\n\t * @param {Number} x Desired horizontal location.\n\t * @param {Number} y Desired vertical location.\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been moved.\n\t */\n\tmoveTo( x, y ) {\n\t\tthis.top = y;\n\t\tthis.right = x + this.width;\n\t\tthis.bottom = y + this.height;\n\t\tthis.left = x;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Moves the rect in–place by a dedicated offset.\n\t *\n\t * @param {Number} x A horizontal offset.\n\t * @param {Number} y A vertical offset\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been moved.\n\t */\n\tmoveBy( x, y ) {\n\t\tthis.top += y;\n\t\tthis.right += x;\n\t\tthis.left += x;\n\t\tthis.bottom += y;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Returns a new rect a a result of intersection with another rect.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect\n\t * @returns {module:utils/dom/rect~Rect}\n\t */\n\tgetIntersection( anotherRect ) {\n\t\tconst rect = {\n\t\t\ttop: Math.max( this.top, anotherRect.top ),\n\t\t\tright: Math.min( this.right, anotherRect.right ),\n\t\t\tbottom: Math.min( this.bottom, anotherRect.bottom ),\n\t\t\tleft: Math.max( this.left, anotherRect.left )\n\t\t};\n\n\t\trect.width = rect.right - rect.left;\n\t\trect.height = rect.bottom - rect.top;\n\n\t\tif ( rect.width < 0 || rect.height < 0 ) {\n\t\t\treturn null;\n\t\t} else {\n\t\t\treturn new Rect( rect );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the area of intersection with another rect.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect [description]\n\t * @returns {Number} Area of intersection.\n\t */\n\tgetIntersectionArea( anotherRect ) {\n\t\tconst rect = this.getIntersection( anotherRect );\n\n\t\tif ( rect ) {\n\t\t\treturn rect.getArea();\n\t\t} else {\n\t\t\treturn 0;\n\t\t}\n\t}\n\n\t/**\n\t * Returns the area of the rect.\n\t *\n\t * @returns {Number}\n\t */\n\tgetArea() {\n\t\treturn this.width * this.height;\n\t}\n\n\t/**\n\t * Returns a new rect, a part of the original rect, which is actually visible to the user,\n\t * e.g. an original rect cropped by parent element rects which have `overflow` set in CSS\n\t * other than `\"visible\"`.\n\t *\n\t * If there's no such visible rect, which is when the rect is limited by one or many of\n\t * the ancestors, `null` is returned.\n\t *\n\t * @returns {module:utils/dom/rect~Rect|null} A visible rect instance or `null`, if there's none.\n\t */\n\tgetVisible() {\n\t\tconst source = this._source;\n\t\tlet visibleRect = this.clone();\n\n\t\t// There's no ancestor to crop with the overflow.\n\t\tif ( !isBody( source ) ) {\n\t\t\tlet parent = source.parentNode || source.commonAncestorContainer;\n\n\t\t\t// Check the ancestors all the way up to the .\n\t\t\twhile ( parent && !isBody( parent ) ) {\n\t\t\t\tconst parentRect = new Rect( parent );\n\t\t\t\tconst intersectionRect = visibleRect.getIntersection( parentRect );\n\n\t\t\t\tif ( intersectionRect ) {\n\t\t\t\t\tif ( intersectionRect.getArea() < visibleRect.getArea() ) {\n\t\t\t\t\t\t// Reduce the visible rect to the intersection.\n\t\t\t\t\t\tvisibleRect = intersectionRect;\n\t\t\t\t\t}\n\t\t\t\t} else {\n\t\t\t\t\t// There's no intersection, the rect is completely invisible.\n\t\t\t\t\treturn null;\n\t\t\t\t}\n\n\t\t\t\tparent = parent.parentNode;\n\t\t\t}\n\t\t}\n\n\t\treturn visibleRect;\n\t}\n\n\t/**\n\t * Checks if all property values ({@link #top}, {@link #left}, {@link #right},\n\t * {@link #bottom}, {@link #width} and {@link #height}) are the equal in both rect\n\t * instances.\n\t *\n\t * @param {module:utils/dom/rect~Rect} rect A rect instance to compare with.\n\t * @returns {Boolean} `true` when Rects are equal. `false` otherwise.\n\t */\n\tisEqual( anotherRect ) {\n\t\tfor ( const prop of rectProperties ) {\n\t\t\tif ( this[ prop ] !== anotherRect[ prop ] ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Checks whether a rect fully contains another rect instance.\n\t *\n\t * @param {module:utils/dom/rect~Rect} anotherRect\n\t * @returns {Boolean} `true` if contains, `false` otherwise.\n\t */\n\tcontains( anotherRect ) {\n\t\tconst intersectRect = this.getIntersection( anotherRect );\n\n\t\treturn !!( intersectRect && intersectRect.isEqual( anotherRect ) );\n\t}\n\n\t/**\n\t * Excludes scrollbars and CSS borders from the rect.\n\t *\n\t * * Borders are removed when {@link #_source} is an HTML element.\n\t * * Scrollbars are excluded from HTML elements and the `window`.\n\t *\n\t * @returns {module:utils/dom/rect~Rect} A rect which has been updated.\n\t */\n\texcludeScrollbarsAndBorders() {\n\t\tconst source = this._source;\n\t\tlet scrollBarWidth, scrollBarHeight, direction;\n\n\t\tif ( isWindow( source ) ) {\n\t\t\tscrollBarWidth = source.innerWidth - source.document.documentElement.clientWidth;\n\t\t\tscrollBarHeight = source.innerHeight - source.document.documentElement.clientHeight;\n\t\t\tdirection = source.getComputedStyle( source.document.documentElement ).direction;\n\t\t} else {\n\t\t\tconst borderWidths = getBorderWidths( this._source );\n\n\t\t\tscrollBarWidth = source.offsetWidth - source.clientWidth - borderWidths.left - borderWidths.right;\n\t\t\tscrollBarHeight = source.offsetHeight - source.clientHeight - borderWidths.top - borderWidths.bottom;\n\t\t\tdirection = source.ownerDocument.defaultView.getComputedStyle( source ).direction;\n\n\t\t\tthis.left += borderWidths.left;\n\t\t\tthis.top += borderWidths.top;\n\t\t\tthis.right -= borderWidths.right;\n\t\t\tthis.bottom -= borderWidths.bottom;\n\t\t\tthis.width = this.right - this.left;\n\t\t\tthis.height = this.bottom - this.top;\n\t\t}\n\n\t\tthis.width -= scrollBarWidth;\n\n\t\tif ( direction === 'ltr' ) {\n\t\t\tthis.right -= scrollBarWidth;\n\t\t} else {\n\t\t\tthis.left += scrollBarWidth;\n\t\t}\n\n\t\tthis.height -= scrollBarHeight;\n\t\tthis.bottom -= scrollBarHeight;\n\n\t\treturn this;\n\t}\n\n\t/**\n\t * Returns an array of rects of the given native DOM Range.\n\t *\n\t * @param {Range} range A native DOM range.\n\t * @returns {Array.} DOM Range rects.\n\t */\n\tstatic getDomRangeRects( range ) {\n\t\tconst rects = [];\n\t\t// Safari does not iterate over ClientRectList using for...of loop.\n\t\tconst clientRects = Array.from( range.getClientRects() );\n\n\t\tif ( clientRects.length ) {\n\t\t\tfor ( const rect of clientRects ) {\n\t\t\t\trects.push( new Rect( rect ) );\n\t\t\t}\n\t\t}\n\t\t// If there's no client rects for the Range, use parent container's bounding rect\n\t\t// instead and adjust rect's width to simulate the actual geometry of such range.\n\t\t// https://github.com/ckeditor/ckeditor5-utils/issues/153\n\t\t// https://github.com/ckeditor/ckeditor5-ui/issues/317\n\t\telse {\n\t\t\tlet startContainer = range.startContainer;\n\n\t\t\tif ( isText( startContainer ) ) {\n\t\t\t\tstartContainer = startContainer.parentNode;\n\t\t\t}\n\n\t\t\tconst rect = new Rect( startContainer.getBoundingClientRect() );\n\t\t\trect.right = rect.left;\n\t\t\trect.width = 0;\n\n\t\t\trects.push( rect );\n\t\t}\n\n\t\treturn rects;\n\t}\n}\n\n// Acquires all the rect properties from the passed source.\n//\n// @private\n// @param {module:utils/dom/rect~Rect} rect\n// @param {ClientRect|module:utils/dom/rect~Rect|Object} source\nfunction copyRectProperties( rect, source ) {\n\tfor ( const p of rectProperties ) {\n\t\trect[ p ] = source[ p ];\n\t}\n}\n\n// Checks if provided object is a HTML element.\n//\n// @private\n// @param {HTMLElement|Range} elementOrRange\n// @returns {Boolean}\nfunction isBody( elementOrRange ) {\n\tif ( !isElement( elementOrRange ) ) {\n\t\treturn false;\n\t}\n\n\treturn elementOrRange === elementOrRange.ownerDocument.body;\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module utils/dom/scroll\n */\n\nimport isRange from './isrange';\nimport Rect from './rect';\nimport isText from './istext';\n\nconst utils = {};\n\n/**\n * Makes any page `HTMLElement` or `Range` (`target`) visible inside the browser viewport.\n * This helper will scroll all `target` ancestors and the web browser viewport to reveal the target to\n * the user. If the `target` is already visible, nothing will happen.\n *\n * @param {HTMLElement|Range} options.target A target, which supposed to become visible to the user.\n * @param {Number} [options.viewportOffset] An offset from the edge of the viewport (in pixels)\n * the `target` will be moved by when the viewport is scrolled. It enhances the user experience\n * by keeping the `target` some distance from the edge of the viewport and thus making it easier to\n * read or edit by the user.\n */\nexport function scrollViewportToShowTarget( { target, viewportOffset = 0 } ) {\n\tconst targetWindow = getWindow( target );\n\tlet currentWindow = targetWindow;\n\tlet currentFrame = null;\n\n\t// Iterate over all windows, starting from target's parent window up to window#top.\n\twhile ( currentWindow ) {\n\t\tlet firstAncestorToScroll;\n\n\t\t// Let's scroll target's ancestors first to reveal it. Then, once the ancestor scrolls\n\t\t// settled down, the algorithm can eventually scroll the viewport of the current window.\n\t\t//\n\t\t// Note: If the current window is target's **original** window (e.g. the first one),\n\t\t// start scrolling the closest parent of the target. If not, scroll the closest parent\n\t\t// of an iframe that resides in the current window.\n\t\tif ( currentWindow == targetWindow ) {\n\t\t\tfirstAncestorToScroll = getParentElement( target );\n\t\t} else {\n\t\t\tfirstAncestorToScroll = getParentElement( currentFrame );\n\t\t}\n\n\t\t// Scroll the target's ancestors first. Once done, scrolling the viewport is easy.\n\t\tscrollAncestorsToShowRect( firstAncestorToScroll, () => {\n\t\t\t// Note: If the target does not belong to the current window **directly**,\n\t\t\t// i.e. it resides in an iframe belonging to the window, obtain the target's rect\n\t\t\t// in the coordinates of the current window. By default, a Rect returns geometry\n\t\t\t// relative to the current window's viewport. To make it work in a parent window,\n\t\t\t// it must be shifted.\n\t\t\treturn getRectRelativeToWindow( target, currentWindow );\n\t\t} );\n\n\t\t// Obtain the rect of the target after it has been scrolled within its ancestors.\n\t\t// It's time to scroll the viewport.\n\t\tconst targetRect = getRectRelativeToWindow( target, currentWindow );\n\n\t\tscrollWindowToShowRect( currentWindow, targetRect, viewportOffset );\n\n\t\tif ( currentWindow.parent != currentWindow ) {\n\t\t\t// Keep the reference to the ' + '';\n }\n },\n {\n name: 'spotify',\n url: [\n /^open\\.spotify\\.com\\/(artist\\/\\w+)/,\n /^open\\.spotify\\.com\\/(album\\/\\w+)/,\n /^open\\.spotify\\.com\\/(track\\/\\w+)/\n ],\n html: match => {\n const id = match[1];\n return '
' + `' + '
';\n }\n },\n {\n name: 'youtube',\n url: [\n /^(?:m\\.)?youtube\\.com\\/watch\\?v=([\\w-]+)/,\n /^(?:m\\.)?youtube\\.com\\/v\\/([\\w-]+)/,\n /^youtube\\.com\\/embed\\/([\\w-]+)/,\n /^youtu\\.be\\/([\\w-]+)/\n ],\n html: match => {\n const id = match[1];\n return '
' + `' + '
';\n }\n },\n {\n name: 'vimeo',\n url: [\n /^vimeo\\.com\\/(\\d+)/,\n /^vimeo\\.com\\/[^/]+\\/[^/]+\\/video\\/(\\d+)/,\n /^vimeo\\.com\\/album\\/[^/]+\\/video\\/(\\d+)/,\n /^vimeo\\.com\\/channels\\/[^/]+\\/(\\d+)/,\n /^vimeo\\.com\\/groups\\/[^/]+\\/videos\\/(\\d+)/,\n /^vimeo\\.com\\/ondemand\\/[^/]+\\/(\\d+)/,\n /^player\\.vimeo\\.com\\/video\\/(\\d+)/\n ],\n html: match => {\n const id = match[1];\n return '
' + `' + '
';\n }\n },\n {\n name: 'instagram',\n url: /^instagram\\.com\\/p\\/(\\w+)/\n },\n {\n name: 'twitter',\n url: /^twitter\\.com/\n },\n {\n name: 'googleMaps',\n url: /^google\\.com\\/maps/\n },\n {\n name: 'flickr',\n url: /^flickr\\.com/\n },\n {\n name: 'facebook',\n url: /^facebook\\.com/\n }\n ]\n });\n /**\n\t\t * The media registry managing the media providers in the editor.\n\t\t *\n\t\t * @member {module:media-embed/mediaregistry~MediaRegistry} #registry\n\t\t */\n this.registry = new MediaRegistry(editor.locale, editor.config.get('mediaEmbed'));\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const schema = editor.model.schema;\n const t = editor.t;\n const conversion = editor.conversion;\n const renderMediaPreview = editor.config.get('mediaEmbed.previewsInData');\n const registry = this.registry;\n editor.commands.add('mediaEmbed', new MediaEmbedCommand(editor));\n // Configure the schema.\n schema.register('media', {\n isObject: true,\n isBlock: true,\n allowWhere: '$block',\n allowAttributes: ['url']\n });\n // Model -> Data\n conversion.for('dataDowncast').elementToElement({\n model: 'media',\n view: (modelElement, viewWriter) => {\n const url = modelElement.getAttribute('url');\n return createMediaFigureElement(viewWriter, registry, url, { renderMediaPreview: url && renderMediaPreview });\n }\n });\n // Model -> Data (url -> data-oembed-url)\n conversion.for('dataDowncast').add(modelToViewUrlAttributeConverter(registry, { renderMediaPreview }));\n // Model -> View (element)\n conversion.for('editingDowncast').elementToElement({\n model: 'media',\n view: (modelElement, viewWriter) => {\n const url = modelElement.getAttribute('url');\n const figure = createMediaFigureElement(viewWriter, registry, url, { renderForEditingView: true });\n return toMediaWidget(figure, viewWriter, t('ao'));\n }\n });\n // Model -> View (url -> data-oembed-url)\n conversion.for('editingDowncast').add(modelToViewUrlAttributeConverter(registry, { renderForEditingView: true }));\n // View -> Model (data-oembed-url -> url)\n conversion.for('upcast') // Upcast semantic media.\n.elementToElement({\n view: {\n name: 'oembed',\n attributes: { url: true }\n },\n model: (viewMedia, modelWriter) => {\n const url = viewMedia.getAttribute('url');\n if (registry.hasMedia(url)) {\n return modelWriter.createElement('media', { url });\n }\n }\n }) // Upcast non-semantic media.\n.elementToElement({\n view: {\n name: 'div',\n attributes: { 'data-oembed-url': true }\n },\n model: (viewMedia, modelWriter) => {\n const url = viewMedia.getAttribute('data-oembed-url');\n if (registry.hasMedia(url)) {\n return modelWriter.createElement('media', { url });\n }\n }\n });\n }\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module media-embed/automediaembed\n */\n\nimport MediaEmbedEditing from './mediaembedediting';\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';\nimport LiveRange from '@ckeditor/ckeditor5-engine/src/model/liverange';\nimport LivePosition from '@ckeditor/ckeditor5-engine/src/model/liveposition';\nimport Undo from '@ckeditor/ckeditor5-undo/src/undo';\nimport global from '@ckeditor/ckeditor5-utils/src/dom/global';\nimport { insertMedia } from './utils';\n\nconst URL_REGEXP = /^(?:http(s)?:\\/\\/)?[\\w.-]+(?:\\.[\\w.-]+)+[\\w\\-._~:/?#[\\]@!$&'()*+,;=]+$/;\n\n/**\n * The auto-media embed plugin. It recognizes media links in the pasted content and embeds\n * them shortly after they are injected into the document.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class AutoMediaEmbed extends Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get requires() {\n\t\treturn [ Clipboard, Undo ];\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get pluginName() {\n\t\treturn 'AutoMediaEmbed';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\tsuper( editor );\n\n\t\t/**\n\t\t * The paste–to–embed `setTimeout` ID. Stored as a property to allow\n\t\t * cleaning of the timeout.\n\t\t *\n\t\t * @private\n\t\t * @member {Number} #_timeoutId\n\t\t */\n\t\tthis._timeoutId = null;\n\n\t\t/**\n\t\t * The position where the `` element will be inserted after the timeout,\n\t\t * determined each time the new content is pasted into the document.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/liveposition~LivePosition} #_positionToInsert\n\t\t */\n\t\tthis._positionToInsert = null;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tconst editor = this.editor;\n\t\tconst modelDocument = editor.model.document;\n\n\t\t// We need to listen on `Clipboard#inputTransformation` because we need to save positions of selection.\n\t\t// After pasting, the content between those positions will be checked for a URL that could be transformed\n\t\t// into media.\n\t\tthis.listenTo( editor.plugins.get( Clipboard ), 'inputTransformation', () => {\n\t\t\tconst firstRange = modelDocument.selection.getFirstRange();\n\n\t\t\tconst leftLivePosition = LivePosition.fromPosition( firstRange.start );\n\t\t\tleftLivePosition.stickiness = 'toPrevious';\n\n\t\t\tconst rightLivePosition = LivePosition.fromPosition( firstRange.end );\n\t\t\trightLivePosition.stickiness = 'toNext';\n\n\t\t\tmodelDocument.once( 'change:data', () => {\n\t\t\t\tthis._embedMediaBetweenPositions( leftLivePosition, rightLivePosition );\n\n\t\t\t\tleftLivePosition.detach();\n\t\t\t\trightLivePosition.detach();\n\t\t\t}, { priority: 'high' } );\n\t\t} );\n\n\t\teditor.commands.get( 'undo' ).on( 'execute', () => {\n\t\t\tif ( this._timeoutId ) {\n\t\t\t\tglobal.window.clearTimeout( this._timeoutId );\n\t\t\t\tthis._positionToInsert.detach();\n\n\t\t\t\tthis._timeoutId = null;\n\t\t\t\tthis._positionToInsert = null;\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\t}\n\n\t/**\n\t * Analyzes the part of the document between provided positions in search for a URL representing media.\n\t * When the URL is found, it is automatically converted into media.\n\t *\n\t * @protected\n\t * @param {module:engine/model/liveposition~LivePosition} leftPosition Left position of the selection.\n\t * @param {module:engine/model/liveposition~LivePosition} rightPosition Right position of the selection.\n\t */\n\t_embedMediaBetweenPositions( leftPosition, rightPosition ) {\n\t\tconst editor = this.editor;\n\t\tconst mediaRegistry = editor.plugins.get( MediaEmbedEditing ).registry;\n\t\t// TODO: Use marker instead of LiveRange & LivePositions.\n\t\tconst urlRange = new LiveRange( leftPosition, rightPosition );\n\t\tconst walker = urlRange.getWalker( { ignoreElementEnd: true } );\n\n\t\tlet url = '';\n\n\t\tfor ( const node of walker ) {\n\t\t\tif ( node.item.is( 'textProxy' ) ) {\n\t\t\t\turl += node.item.data;\n\t\t\t}\n\t\t}\n\n\t\turl = url.trim();\n\n\t\t// If the URL does not match to universal URL regexp, let's skip that.\n\t\tif ( !url.match( URL_REGEXP ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// If the URL represents a media, let's use it.\n\t\tif ( !mediaRegistry.hasMedia( url ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst mediaEmbedCommand = editor.commands.get( 'mediaEmbed' );\n\n\t\t// Do not anything if media element cannot be inserted at the current position (#47).\n\t\tif ( !mediaEmbedCommand.isEnabled ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// Position won't be available in the `setTimeout` function so let's clone it.\n\t\tthis._positionToInsert = LivePosition.fromPosition( leftPosition );\n\n\t\t// This action mustn't be executed if undo was called between pasting and auto-embedding.\n\t\tthis._timeoutId = global.window.setTimeout( () => {\n\t\t\teditor.model.change( writer => {\n\t\t\t\tthis._timeoutId = null;\n\n\t\t\t\twriter.remove( urlRange );\n\n\t\t\t\tlet insertionPosition;\n\n\t\t\t\t// Check if position where the media element should be inserted is still valid.\n\t\t\t\t// Otherwise leave it as undefined to use document.selection - default behavior of model.insertContent().\n\t\t\t\tif ( this._positionToInsert.root.rootName !== '$graveyard' ) {\n\t\t\t\t\tinsertionPosition = this._positionToInsert;\n\t\t\t\t}\n\n\t\t\t\tinsertMedia( editor.model, url, insertionPosition );\n\n\t\t\t\tthis._positionToInsert.detach();\n\t\t\t\tthis._positionToInsert = null;\n\t\t\t} );\n\t\t}, 100 );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module media-embed/ui/mediaformview\n */\nimport View from '@ckeditor/ckeditor5-ui/src/view';\nimport ViewCollection from '@ckeditor/ckeditor5-ui/src/viewcollection';\nimport ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';\nimport LabeledInputView from '@ckeditor/ckeditor5-ui/src/labeledinput/labeledinputview';\nimport InputTextView from '@ckeditor/ckeditor5-ui/src/inputtext/inputtextview';\nimport submitHandler from '@ckeditor/ckeditor5-ui/src/bindings/submithandler';\nimport FocusTracker from '@ckeditor/ckeditor5-utils/src/focustracker';\nimport FocusCycler from '@ckeditor/ckeditor5-ui/src/focuscycler';\nimport KeystrokeHandler from '@ckeditor/ckeditor5-utils/src/keystrokehandler';\nimport checkIcon from '@ckeditor/ckeditor5-core/theme/icons/check.svg';\nimport cancelIcon from '@ckeditor/ckeditor5-core/theme/icons/cancel.svg';\nimport '../../theme/mediaform.css';\n/**\n * The media form view controller class.\n *\n * See {@link module:media-embed/ui/mediaformview~MediaFormView}.\n *\n * @extends module:ui/view~View\n */\nexport default class MediaFormView extends View {\n /**\n\t * @param {Array.} validators Form validators used by {@link #isValid}.\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t */\n constructor(validators, locale) {\n super(locale);\n const t = locale.t;\n /**\n\t\t * Tracks information about DOM focus in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/focustracker~FocusTracker}\n\t\t */\n this.focusTracker = new FocusTracker();\n /**\n\t\t * An instance of the {@link module:utils/keystrokehandler~KeystrokeHandler}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/keystrokehandler~KeystrokeHandler}\n\t\t */\n this.keystrokes = new KeystrokeHandler();\n /**\n\t\t * The URL input view.\n\t\t *\n\t\t * @member {module:ui/labeledinput/labeledinputview~LabeledInputView}\n\t\t */\n this.urlInputView = this._createUrlInput();\n /**\n\t\t * The Save button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.saveButtonView = this._createButton(t('bc'), checkIcon, 'ck-button-save');\n this.saveButtonView.type = 'submit';\n /**\n\t\t * The Cancel button view.\n\t\t *\n\t\t * @member {module:ui/button/buttonview~ButtonView}\n\t\t */\n this.cancelButtonView = this._createButton(t('bd'), cancelIcon, 'ck-button-cancel', 'cancel');\n /**\n\t\t * A collection of views that can be focused in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n this._focusables = new ViewCollection();\n /**\n\t\t * Helps cycling over {@link #_focusables} in the form.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/focuscycler~FocusCycler}\n\t\t */\n this._focusCycler = new FocusCycler({\n focusables: this._focusables,\n focusTracker: this.focusTracker,\n keystrokeHandler: this.keystrokes,\n actions: {\n // Navigate form fields backwards using the Shift + Tab keystroke.\n focusPrevious: 'shift + tab',\n // Navigate form fields forwards using the Tab key.\n focusNext: 'tab'\n }\n });\n /**\n\t\t * An array of form validators used by {@link #isValid}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Array.}\n\t\t */\n this._validators = validators;\n this.setTemplate({\n tag: 'form',\n attributes: {\n class: [\n 'ck',\n 'ck-media-form'\n ],\n tabindex: '-1'\n },\n children: [\n this.urlInputView,\n this.saveButtonView,\n this.cancelButtonView\n ]\n }); /**\n\t\t * The default info text for the {@link #urlInputView}.\n\t\t *\n\t\t * @private\n\t\t * @member {String} #_urlInputViewInfoDefault\n\t\t */\n /**\n\t\t * The info text with an additional tip for the {@link #urlInputView},\n\t\t * displayed when the input has some value.\n\t\t *\n\t\t * @private\n\t\t * @member {String} #_urlInputViewInfoTip\n\t\t */\n }\n /**\n\t * @inheritDoc\n\t */\n render() {\n super.render();\n submitHandler({ view: this });\n const childViews = [\n this.urlInputView,\n this.saveButtonView,\n this.cancelButtonView\n ];\n childViews.forEach(v => {\n // Register the view as focusable.\n this._focusables.add(v);\n // Register the view in the focus tracker.\n this.focusTracker.add(v.element);\n });\n // Start listening for the keystrokes coming from #element.\n this.keystrokes.listenTo(this.element);\n const stopPropagation = data => data.stopPropagation();\n // Since the form is in the dropdown panel which is a child of the toolbar, the toolbar's\n // keystroke handler would take over the key management in the URL input. We need to prevent\n // this ASAP. Otherwise, the basic caret movement using the arrow keys will be impossible.\n this.keystrokes.set('arrowright', stopPropagation);\n this.keystrokes.set('arrowleft', stopPropagation);\n this.keystrokes.set('arrowup', stopPropagation);\n this.keystrokes.set('arrowdown', stopPropagation);\n // Intercept the \"selectstart\" event, which is blocked by default because of the default behavior\n // of the DropdownView#panelView.\n // TODO: blocking \"selectstart\" in the #panelView should be configurable per–drop–down instance.\n this.listenTo(this.urlInputView.element, 'selectstart', (evt, domEvt) => {\n domEvt.stopPropagation();\n }, { priority: 'high' });\n }\n /**\n\t * Focuses the fist {@link #_focusables} in the form.\n\t */\n focus() {\n this._focusCycler.focusFirst();\n }\n /**\n\t * The native DOM `value` of the {@link #urlInputView} element.\n\t *\n\t * **Note**: Do not confuse it with the {@link module:ui/inputtext/inputtextview~InputTextView#value}\n\t * which works one way only and may not represent the actual state of the component in the DOM.\n\t *\n\t * @type {Number}\n\t */\n get url() {\n return this.urlInputView.inputView.element.value.trim();\n }\n /**\n\t * Sets the native DOM `value` of the {@link #urlInputView} element.\n\t *\n\t * **Note**: Do not confuse it with the {@link module:ui/inputtext/inputtextview~InputTextView#value}\n\t * which works one way only and may not represent the actual state of the component in the DOM.\n\t *\n\t * @param {String} url\n\t */\n set url(url) {\n this.urlInputView.inputView.element.value = url.trim();\n }\n /**\n\t * Validates the form and returns `false` when some fields are invalid.\n\t *\n\t * @returns {Boolean}\n\t */\n isValid() {\n this.resetFormStatus();\n for (const validator of this._validators) {\n const errorText = validator(this);\n // One error per field is enough.\n if (errorText) {\n // Apply updated error.\n this.urlInputView.errorText = errorText;\n return false;\n }\n }\n return true;\n }\n /**\n\t * Cleans up the supplementary error and information text of the {@link #urlInputView}\n\t * bringing them back to the state when the form has been displayed for the first time.\n\t *\n\t * See {@link #isValid}.\n\t */\n resetFormStatus() {\n this.urlInputView.errorText = null;\n this.urlInputView.infoText = this._urlInputViewInfoDefault;\n }\n /**\n\t * Creates a labeled input view.\n\t *\n\t * @private\n\t * @returns {module:ui/labeledinput/labeledinputview~LabeledInputView} Labeled input view instance.\n\t */\n _createUrlInput() {\n const t = this.locale.t;\n const labeledInput = new LabeledInputView(this.locale, InputTextView);\n const inputView = labeledInput.inputView;\n this._urlInputViewInfoDefault = t('be');\n this._urlInputViewInfoTip = t('bf');\n labeledInput.label = t('bg');\n labeledInput.infoText = this._urlInputViewInfoDefault;\n inputView.placeholder = 'https://example.com';\n inputView.on('input', () => {\n // Display the tip text only when there's some value. Otherwise fall back to the default info text.\n labeledInput.infoText = inputView.element.value ? this._urlInputViewInfoTip : this._urlInputViewInfoDefault;\n });\n return labeledInput;\n }\n /**\n\t * Creates a button view.\n\t *\n\t * @private\n\t * @param {String} label The button label.\n\t * @param {String} icon The button icon.\n\t * @param {String} className The additional button CSS class name.\n\t * @param {String} [eventName] An event name that the `ButtonView#execute` event will be delegated to.\n\t * @returns {module:ui/button/buttonview~ButtonView} The button view instance.\n\t */\n _createButton(label, icon, className, eventName) {\n const button = new ButtonView(this.locale);\n button.set({\n label,\n icon,\n tooltip: true\n });\n button.extendTemplate({ attributes: { class: className } });\n if (eventName) {\n button.delegate('execute').to(this, eventName);\n }\n return button;\n }\n} /**\n * Fired when the form view is submitted (when one of the children triggered the submit event),\n * e.g. click on {@link #saveButtonView}.\n *\n * @event submit\n */\n /**\n * Fired when the form view is canceled, e.g. click on {@link #cancelButtonView}.\n *\n * @event cancel\n */","export default \"\"","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n/**\n * @module media-embed/mediaembedui\n */\nimport Plugin from '@ckeditor/ckeditor5-core/src/plugin';\nimport { createDropdown } from '@ckeditor/ckeditor5-ui/src/dropdown/utils';\nimport MediaFormView from './ui/mediaformview';\nimport MediaEmbedEditing from './mediaembedediting';\nimport mediaIcon from '../theme/icons/media.svg';\n/**\n * The media embed UI plugin.\n *\n * @extends module:core/plugin~Plugin\n */\nexport default class MediaEmbedUI extends Plugin {\n /**\n\t * @inheritDoc\n\t */\n static get requires() {\n return [MediaEmbedEditing];\n }\n /**\n\t * @inheritDoc\n\t */\n static get pluginName() {\n return 'MediaEmbedUI';\n }\n /**\n\t * @inheritDoc\n\t */\n init() {\n const editor = this.editor;\n const command = editor.commands.get('mediaEmbed');\n const registry = editor.plugins.get(MediaEmbedEditing).registry;\n /**\n\t\t * The form view displayed inside the drop-down.\n\t\t *\n\t\t * @member {module:media-embed/ui/mediaformview~MediaFormView}\n\t\t */\n this.form = new MediaFormView(getFormValidators(editor.t, registry), editor.locale);\n // Setup `imageUpload` button.\n editor.ui.componentFactory.add('mediaEmbed', locale => {\n const dropdown = createDropdown(locale);\n this._setUpDropdown(dropdown, this.form, command, editor);\n this._setUpForm(this.form, dropdown, command);\n return dropdown;\n });\n }\n _setUpDropdown(dropdown, form, command) {\n const editor = this.editor;\n const t = editor.t;\n const button = dropdown.buttonView;\n dropdown.bind('isEnabled').to(command);\n dropdown.panelView.children.add(form);\n button.set({\n label: t('ap'),\n icon: mediaIcon,\n tooltip: true\n });\n // Note: Use the low priority to make sure the following listener starts working after the\n // default action of the drop-down is executed (i.e. the panel showed up). Otherwise, the\n // invisible form/input cannot be focused/selected.\n button.on('open', () => {\n // Make sure that each time the panel shows up, the URL field remains in sync with the value of\n // the command. If the user typed in the input, then canceled (`urlInputView#value` stays\n // unaltered) and re-opened it without changing the value of the media command (e.g. because they\n // didn't change the selection), they would see the old value instead of the actual value of the\n // command.\n form.url = command.value || '';\n form.urlInputView.select();\n form.focus();\n }, { priority: 'low' });\n dropdown.on('submit', () => {\n if (form.isValid()) {\n editor.execute('mediaEmbed', form.url);\n closeUI();\n }\n });\n dropdown.on('change:isOpen', () => form.resetFormStatus());\n dropdown.on('cancel', () => closeUI());\n function closeUI() {\n editor.editing.view.focus();\n dropdown.isOpen = false;\n }\n }\n _setUpForm(form, dropdown, command) {\n form.delegate('submit', 'cancel').to(dropdown);\n form.urlInputView.bind('value').to(command, 'value');\n // Form elements should be read-only when corresponding commands are disabled.\n form.urlInputView.bind('isReadOnly').to(command, 'isEnabled', value => !value);\n form.saveButtonView.bind('isEnabled').to(command);\n }\n}\nfunction getFormValidators(t, registry) {\n return [\n form => {\n if (!form.url.length) {\n return t('aq');\n }\n },\n form => {\n if (!registry.hasMedia(form.url)) {\n return t('ar');\n }\n }\n ];\n}","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/list\n */\n\nimport Element from '@ckeditor/ckeditor5-engine/src/view/element';\nimport Matcher from '@ckeditor/ckeditor5-engine/src/view/matcher';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\n\n/**\n * Transforms Word specific list-like elements to the semantic HTML lists.\n *\n * Lists in Word are represented by block elements with special attributes like:\n *\n *\t\t

...

// Paragraph based list.\n *\t\t

...

// Heading 1 based list.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment The view structure which to transform.\n * @param {String} stylesString Styles from which list-like elements styling will be extracted.\n */\nexport function transformListItemLikeElementsIntoLists( documentFragment, stylesString ) {\n\tif ( !documentFragment.childCount ) {\n\t\treturn;\n\t}\n\n\tconst writer = new UpcastWriter();\n\tconst itemLikeElements = findAllItemLikeElements( documentFragment, writer );\n\n\tif ( !itemLikeElements.length ) {\n\t\treturn;\n\t}\n\n\tlet currentList = null;\n\n\titemLikeElements.forEach( ( itemLikeElement, i ) => {\n\t\tif ( !currentList || isNewListNeeded( itemLikeElements[ i - 1 ], itemLikeElement ) ) {\n\t\t\tconst listStyle = detectListStyle( itemLikeElement, stylesString );\n\n\t\t\tcurrentList = insertNewEmptyList( listStyle, itemLikeElement.element, writer );\n\t\t}\n\n\t\tconst listItem = transformElementIntoListItem( itemLikeElement.element, writer );\n\n\t\twriter.appendChild( listItem, currentList );\n\t} );\n}\n\n/**\n * Removes paragraph wrapping content inside a list item.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment\n * @param {module:engine/view/upcastwriter~UpcastWriter} writer\n */\nexport function unwrapParagraphInListItem( documentFragment, writer ) {\n\tfor ( const value of writer.createRangeIn( documentFragment ) ) {\n\t\tconst element = value.item;\n\n\t\tif ( element.is( 'li' ) ) {\n\t\t\t// Google Docs allows on single paragraph inside LI.\n\t\t\tconst firstChild = element.getChild( 0 );\n\n\t\t\tif ( firstChild.is( 'p' ) ) {\n\t\t\t\twriter.unwrapElement( firstChild );\n\t\t\t}\n\t\t}\n\t}\n}\n\n// Finds all list-like elements in a given document fragment.\n//\n// @param {module:engine/view/documentfragment~DocumentFragment} documentFragment Document fragment\n// in which to look for list-like nodes.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {Array.} Array of found list-like items. Each item is an object containing:\n//\n//\t\t* {module:engine/src/view/element~Element} element List-like element.\n//\t\t* {Number} id List item id parsed from `mso-list` style (see `getListItemData()` function).\n//\t\t* {Number} order List item creation order parsed from `mso-list` style (see `getListItemData()` function).\n//\t\t* {Number} indent List item indentation level parsed from `mso-list` style (see `getListItemData()` function).\nfunction findAllItemLikeElements( documentFragment, writer ) {\n\tconst range = writer.createRangeIn( documentFragment );\n\n\t// Matcher for finding list-like elements.\n\tconst itemLikeElementsMatcher = new Matcher( {\n\t\tname: /^p|h\\d+$/,\n\t\tstyles: {\n\t\t\t'mso-list': /.*/\n\t\t}\n\t} );\n\n\tconst itemLikeElements = [];\n\n\tfor ( const value of range ) {\n\t\tif ( value.type === 'elementStart' && itemLikeElementsMatcher.match( value.item ) ) {\n\t\t\tconst itemData = getListItemData( value.item );\n\n\t\t\titemLikeElements.push( {\n\t\t\t\telement: value.item,\n\t\t\t\tid: itemData.id,\n\t\t\t\torder: itemData.order,\n\t\t\t\tindent: itemData.indent\n\t\t\t} );\n\t\t}\n\t}\n\n\treturn itemLikeElements;\n}\n\n// Extracts list item style from the provided CSS.\n//\n// List item style is extracted from CSS stylesheet. Each list with its specific style attribute\n// value (`mso-list:l1 level1 lfo1`) has its dedicated properties in a CSS stylesheet defined with a selector like:\n//\n// \t\t@list l1:level1 { ... }\n//\n// It contains `mso-level-number-format` property which defines list numbering/bullet style. If this property\n// is not defined it means default `decimal` numbering.\n//\n// Here CSS string representation is used as `mso-level-number-format` property is an invalid CSS property\n// and will be removed during CSS parsing.\n//\n// @param {Object} listLikeItem List-like item for which list style will be searched for. Usually\n// a result of `findAllItemLikeElements()` function.\n// @param {String} stylesString CSS stylesheet.\n// @returns {Object} result\n// @returns {String} result.type List type, could be `ul` or `ol`.\n// @returns {String} result.style List style, for example: `decimal`, `lower-roman`, etc. It is extracted\n// directly from Word stylesheet without further processing and may be not compatible\n// with CSS `list-style-type` property accepted values.\nfunction detectListStyle( listLikeItem, stylesString ) {\n\tconst listStyleRegexp = new RegExp( `@list l${ listLikeItem.id }:level${ listLikeItem.indent }\\\\s*({[^}]*)`, 'gi' );\n\tconst listStyleTypeRegex = /mso-level-number-format:([^;]*);/gi;\n\n\tconst listStyleMatch = listStyleRegexp.exec( stylesString );\n\n\tlet listStyleType = 'decimal'; // Decimal is default one.\n\tif ( listStyleMatch && listStyleMatch[ 1 ] ) {\n\t\tconst listStyleTypeMatch = listStyleTypeRegex.exec( listStyleMatch[ 1 ] );\n\n\t\tif ( listStyleTypeMatch && listStyleTypeMatch[ 1 ] ) {\n\t\t\tlistStyleType = listStyleTypeMatch[ 1 ].trim();\n\t\t}\n\t}\n\n\treturn {\n\t\ttype: listStyleType !== 'bullet' && listStyleType !== 'image' ? 'ol' : 'ul',\n\t\tstyle: listStyleType\n\t};\n}\n\n// Creates empty list of a given type and inserts it after a specified element.\n//\n// @param {Object} listStyle List style object which determines the type of newly created list.\n// Usually a result of `detectListStyle()` function.\n// @param {module:engine/view/element~Element} element Element before which list is inserted.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {module:engine/view/element~Element} Newly created list element.\nfunction insertNewEmptyList( listStyle, element, writer ) {\n\tconst list = new Element( listStyle.type );\n\tconst position = element.parent.getChildIndex( element );\n\n\twriter.insertChild( position, list, element.parent );\n\n\treturn list;\n}\n\n// Transforms given element into a semantic list item. As the function operates on a provided\n// {module:engine/src/view/element~Element element} it will modify the view structure to which this element belongs.\n//\n// @param {module:engine/view/element~Element} element Element which will be transformed into list item.\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\n// @returns {module:engine/view/element~Element} New element to which the given one was transformed. It is\n// inserted in place of the old element (the reference to the old element is lost due to renaming).\nfunction transformElementIntoListItem( element, writer ) {\n\tremoveBulletElement( element, writer );\n\n\treturn writer.rename( 'li', element );\n}\n\n// Extracts list item information from Word specific list-like element style:\n//\n//\t\t`style=\"mso-list:l1 level1 lfo1\"`\n//\n// where:\n//\n//\t\t* `l1` is a list id (however it does not mean this is a continuous list - see #43),\n//\t\t* `level1` is a list item indentation level,\n//\t\t* `lfo1` is a list insertion order in a document.\n//\n// @param {module:engine/view/element~Element} element Element from which style data is extracted.\n// @returns {Object} result\n// @returns {Number} result.id Parent list id.\n// @returns {Number} result.order List item creation order.\n// @returns {Number} result.indent List item indentation level.\nfunction getListItemData( element ) {\n\tconst data = {};\n\tconst listStyle = element.getStyle( 'mso-list' );\n\n\tif ( listStyle ) {\n\t\tconst idMatch = listStyle.match( /(^|\\s+)l(\\d+)/i );\n\t\tconst orderMatch = listStyle.match( /\\s*lfo(\\d+)/i );\n\t\tconst indentMatch = listStyle.match( /\\s*level(\\d+)/i );\n\n\t\tif ( idMatch && orderMatch && indentMatch ) {\n\t\t\tdata.id = idMatch[ 2 ];\n\t\t\tdata.order = orderMatch[ 1 ];\n\t\t\tdata.indent = indentMatch[ 1 ];\n\t\t}\n\t}\n\n\treturn data;\n}\n\n// Removes span with a numbering/bullet from a given element.\n//\n// @param {module:engine/view/element~Element} element\n// @param {module:engine/view/upcastwriter~UpcastWriter} writer\nfunction removeBulletElement( element, writer ) {\n\t// Matcher for finding `span` elements holding lists numbering/bullets.\n\tconst bulletMatcher = new Matcher( {\n\t\tname: 'span',\n\t\tstyles: {\n\t\t\t'mso-list': 'Ignore'\n\t\t}\n\t} );\n\n\tconst range = writer.createRangeIn( element );\n\n\tfor ( const value of range ) {\n\t\tif ( value.type === 'elementStart' && bulletMatcher.match( value.item ) ) {\n\t\t\twriter.remove( value.item );\n\t\t}\n\t}\n}\n\n// Whether previous and current item belongs to the same list. It is determined based on `item.id`\n// (extracted from `mso-list` style, see #getListItemData) and previous sibling of the current item.\n//\n// @param {Object} previousItem\n// @param {Object} currentItem\n// @returns {Boolean}\nfunction isNewListNeeded( previousItem, currentItem ) {\n\tif ( previousItem.id !== currentItem.id ) {\n\t\treturn true;\n\t}\n\n\tconst previousSibling = currentItem.element.previousSibling;\n\n\tif ( !previousSibling ) {\n\t\treturn true;\n\t}\n\n\t// Even with the same id the list does not have to be continuous (#43).\n\treturn !isList( previousSibling );\n}\n\nfunction isList( element ) {\n\treturn element.is( 'ol' ) || element.is( 'ul' );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/normalizers/googledocsnormalizer\n */\n\nimport removeBoldWrapper from '../filters/removeboldwrapper';\nimport { unwrapParagraphInListItem } from '../filters/list';\nimport UpcastWriter from '@ckeditor/ckeditor5-engine/src/view/upcastwriter';\n\nconst googleDocsMatch = /id=(\"|')docs-internal-guid-[-0-9a-f]+(\"|')/i;\n\n/**\n * Normalizer for the content pasted from Google Docs.\n *\n * @implements module:paste-from-office/normalizer~Normalizer\n */\nexport default class GoogleDocsNormalizer {\n\t/**\n\t * @inheritDoc\n\t */\n\tisActive( htmlString ) {\n\t\treturn googleDocsMatch.test( htmlString );\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\texecute( data ) {\n\t\tconst writer = new UpcastWriter();\n\n\t\tremoveBoldWrapper( data.content, writer );\n\t\tunwrapParagraphInListItem( data.content, writer );\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/removeboldwrapper\n */\n\n/**\n * Removes `` tag wrapper added by Google Docs to a copied content.\n *\n * @param {module:engine/view/documentfragment~DocumentFragment} documentFragment element `data.content` obtained from clipboard\n * @param {module:engine/view/upcastwriter~UpcastWriter} writer\n */\nexport default function removeBoldWrapper( documentFragment, writer ) {\n\tfor ( const child of documentFragment.getChildren() ) {\n\t\tif ( child.is( 'b' ) && child.getStyle( 'font-weight' ) === 'normal' ) {\n\t\t\tconst childIndex = documentFragment.getChildIndex( child );\n\n\t\t\twriter.remove( child );\n\t\t\twriter.insertChild( childIndex, child.getChildren(), documentFragment );\n\t\t}\n\t}\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/space\n */\n\n/**\n * Replaces last space preceding elements closing tag with ` `. Such operation prevents spaces from being removed\n * during further DOM/View processing (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n * This method also takes into account Word specific `` empty tags.\n * Additionally multiline sequences of spaces and new lines between tags are removed (see #39 and #40).\n *\n * @param {String} htmlString HTML string in which spacing should be normalized.\n * @returns {String} Input HTML with spaces normalized.\n */\nexport function normalizeSpacing( htmlString ) {\n\t// Run normalizeSafariSpaceSpans() two times to cover nested spans.\n\treturn normalizeSafariSpaceSpans( normalizeSafariSpaceSpans( htmlString ) )\n\t\t// Remove all \\r\\n from \"spacerun spans\" so the last replace line doesn't strip all whitespaces.\n\t\t.replace( /([\\s]*?)[\\r\\n]+(\\s*<\\/span>)/g, '$1$2' )\n\t\t.replace( /<\\/span>/g, '' )\n\t\t.replace( / <\\//g, '\\u00A0<\\/o:p>/g, '\\u00A0' )\n\t\t// Remove block filler from empty paragraph. Safari uses \\u00A0 instead of  .\n\t\t.replace( /( |\\u00A0)<\\/o:p>/g, '' )\n\t\t// Remove all whitespaces when they contain any \\r or \\n.\n\t\t.replace( />(\\s*[\\r\\n]\\s*)<' );\n}\n\n/**\n * Normalizes spacing in special Word `spacerun spans` (`\\s+`) by replacing\n * all spaces with `  ` pairs. This prevents spaces from being removed during further DOM/View processing\n * (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n *\n * @param {Document} htmlDocument Native `Document` object in which spacing should be normalized.\n */\nexport function normalizeSpacerunSpans( htmlDocument ) {\n\thtmlDocument.querySelectorAll( 'span[style*=spacerun]' ).forEach( el => {\n\t\t// Use `el.childNodes[ 0 ].data.length` instead of `el.innerText.length`. For `el.innerText.length` which\n\t\t// contains spaces mixed with ` ` Edge browser returns incorrect length.\n\t\tconst innerTextLength = ( el.childNodes &&\n\t\t\tel.childNodes[ 0 ] &&\n\t\t\tel.childNodes[ 0 ].data &&\n\t\t\tel.childNodes[ 0 ].data.length ) || 0;\n\n\t\tel.innerHTML = Array( innerTextLength + 1 ).join( '\\u00A0 ' ).substr( 0, innerTextLength );\n\t} );\n}\n\n// Normalizes specific spacing generated by Safari when content pasted from Word (` `)\n// by replacing all spaces sequences longer than 1 space with `  ` pairs. This prevents spaces from being removed during\n// further DOM/View processing (see especially {@link module:engine/view/domconverter~DomConverter#_processDataFromDomText}).\n//\n// This function is similar to {@link module:clipboard/utils/normalizeclipboarddata normalizeClipboardData util} but uses\n// regular spaces /   sequence for replacement.\n//\n// @param {String} htmlString HTML string in which spacing should be normalized\n// @returns {String} Input HTML with spaces normalized.\nfunction normalizeSafariSpaceSpans( htmlString ) {\n\treturn htmlString.replace( /(\\s+)<\\/span>/g, ( fullMatch, spaces ) => {\n\t\treturn spaces.length === 1 ? ' ' : Array( spaces.length + 1 ).join( '\\u00A0 ' ).substr( 0, spaces.length );\n\t} );\n}\n","/**\n * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license\n */\n\n/**\n * @module paste-from-office/filters/parse\n */\n\n/* globals DOMParser */\n\nimport DomConverter from '@ckeditor/ckeditor5-engine/src/view/domconverter';\n\nimport { normalizeSpacing, normalizeSpacerunSpans } from './space';\n\n/**\n * Parses provided HTML extracting contents of `` and `