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zoomy.js
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zoomy.js
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/*
* Zoomy 2.0.0 - jQuery plugin
* http://zoomy.me
*
* Copyright (c) 2012 Jacob Lowe (http://redeyeoperations.com)
* Licensed under the MIT (MIT-LICENSE.txt)
*
* Built for jQuery library
* http://jquery.com
*
* Addition fixes and modifications done by Larry Battle ( [email protected] )
* Code has been refactored and the logic has been corrected.
*
*/
(function($) {
// @object ZoomyS Object - Holds alot of data for each instance of Zoomy
'use strict';
var ZoomyS = {
count : [],
pos: null
};
/** @method zoomy Function - Plugin for jQuery
* @param event String - Event to initiate Zoomy
* @param options object - Options Object that holds optons for configuration
*/
$.fn.zoomy = function (event, options) {
// @variable defaults Object - Is overwritten by options Object
var defaults = {
zoomSize : 200,
round : true,
glare : true,
clickable : false,
attr : 'href',
border : '5px solid #999',
zoomInit : null, //callback for when zoom initializes
zoomStart : null, // callback for when zoom starts
zoomStop : null, // callback for when the zoom ends
fixed : false, // display Zoomy on a fixed position
fixedX : 0, // coordinates for fixed Zoomy
fixedY : 0
},
//Test for touch
touch = (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch) ? true : false,
cssTranforms = (function () {
var b = document.body || document.documentElement,
s = b.style,
p = 'transition',v;
if(typeof s[p] == 'string') {return true; }
// Tests for vendor specific prop
v = ['Moz', 'Webkit', 'Khtml', 'O', 'ms'];
p = p.charAt(0).toUpperCase() + p.substr(1);
for(var i=0; i<v.length; i++) {
if(typeof s[v[i] + p] == 'string') { return true; }
}
return false;
}()),
//Change default event on touch
defaultEvent = (touch) ? 'touchstart' : 'click',
/* @object utils Object - Set of utitlities needed for Zoomy
* @method pos Object - position utitlities
*
* @method stop Function - Helper to calculate stops for crash detection
* @param x Interger - Thumnail images position
* @param z Interger - Size of the Zoom element
* @param o Interger - Size of border to offset it
* @param s Interger - Postion of Stop ^^
*
* @method mouse Function - Mouse position relative to image
* @param x Interger - Offest from page
* @param y Interger - Offset from thumbnail
* @param h Interger - Half the size of the Zoom Element
*
* @method zoom Funtion - Postion of Zoomy Element
* @param x Interger - Offset from page
* @param y Interger - Element positon
* @param z Interger - Ratio of Zoom
* @param h Interger - Half the size of Zoomt Element
* @param o Interger - Size of border to offset it
*
*/
utils = {
pos: {
stop : function (x , z, o, s) {
return (x - z - o) + s;
},
mouse : function (x, y, h) {
return x - y - h;
},
zoom : function (x, y, z, h, o) {
return ((x - y) / z) - h + o;
}
},
/* @method css Function - Compiles and Object of Css properties
*/
css: function(a){
if(typeof a !== 'undefined' && a.length > 0){
if (options.fixed) {
a[2] = options.fixedX;
a[3] = options.fixedY;
}
var translate = 'translate3d(' + a[2]+ 'px, ' + a[3] + 'px, 0)';
var movement = (cssTranforms) ? {
'-webkit-transform' : translate,
'-moz-transform' : translate,
'-ms-tranform' : translate,
'-o-tranform' : translate,
'transform' : translate
} : {
'top' : a[3] + 'px',
'left' : a[2] + 'px'
};
return $.extend({'backgroundPosition' : '-' + a[0] + 'px ' + '-' + a[1] + 'px'}, movement);
}else{
return {};
}
},
//asspect ratio
ratio: function(x, y){
return x / y;
},
setParams: function(zoom){
var id = zoom.attr('rel');
ZoomyS[id].size = {};
ZoomyS[id].size.full = options.zoomSize + (ZoomyS[id].zoom.border * 2);
ZoomyS[id].size.half = ZoomyS[id].size.full / 2;
ZoomyS[id].size.ratioX = utils.ratio(ZoomyS[id].css.width, ZoomyS[id].zoom.x);
ZoomyS[id].size.ratioY = utils.ratio(ZoomyS[id].css.height, ZoomyS[id].zoom.y);
ZoomyS[id].size.zoomX = ZoomyS[id].zoom.x - ZoomyS[id].size.full;
ZoomyS[id].size.zoomY = ZoomyS[id].zoom.y - ZoomyS[id].size.full;
ZoomyS[id].stop = {};
ZoomyS[id].stop.main = ZoomyS[id].size.half - (ZoomyS[id].size.half * ZoomyS[id].size.ratioX) - (ZoomyS[id].zoom.border * ZoomyS[id].size.ratioX) + ZoomyS[id].zoom.border;
ZoomyS[id].stop.right = utils.pos.stop(ZoomyS[id].css.width, ZoomyS[id].size.full, ZoomyS[id].zoom.border, ZoomyS[id].stop.main);
ZoomyS[id].stop.bottom = utils.pos.stop(ZoomyS[id].css.height, ZoomyS[id].size.full, ZoomyS[id].zoom.border, ZoomyS[id].stop.main);
}
},
/* @object change Object - Handle events that directly effect the Elements
*
* @method move Function - Calculates and handles moving the Zoomy Element
* @param ele Object - The main element or the anchor tag wrapping img
* @param zoom Oject - The Zoomy Element
* @param e Object - The event object for mousemove or touchmove.
*
* @method classes Function - Toggles classes on main element
* @param ele Object - The main element or the anchor tag wrapping img
*
* @method enter Function - Handles the start of Zoomy
* @param ele Object - The main element or the anchor tag wrapping img
* @param zoom Oject - The Zoomy Element
*
* @method leave Function - Handles the stopping of Zoomy
* @param ele Object - The main element or the anchor tag wrapping img
* @param zoom Oject - The Zoomy Element
* @param x Interger - Flag to handle at diffent state of Zoomy.
*
* @method callback Function - Executes a callback function if one is passed
* @param type Function - The actual callback function
* @param zoom Object - The Zoomy Object to pull data from
*/
change = {
collision : function(posX, posY, dataset){
// Test for collisions
var a = -dataset.stop.main <= posX,
e2 = -dataset.stop.main > posX,
b = -dataset.stop.main <= posY,
f = -dataset.stop.main > posY,
d = dataset.stop.bottom > posY,
g = dataset.stop.bottom <= posY,
c = dataset.stop.right > posX,
j = dataset.stop.right <= posX;
// Results of collision
return(a && b && c && d) ? 0 : (e2) ? (b && d) ? 1 : (f) ? 2 : (g) ? 3 : null : (f) ? (c) ? 4 : 5 : (j) ? (d) ? 6 : 7 : (g) ? 8 : null;
},
possibilities : function(index, dataset, leftX, topY, posX, posY){
var fn = {
// In the Center
0 : [leftX, topY, posX, posY],
// On Left Side
1 : [0, topY, -dataset.stop.main, posY],
// On the Top Left Corner
2 : [0, 0, -dataset.stop.main, -dataset.stop.main],
//On the Bottom Left Corner
3 : [0, dataset.size.zoomY, -dataset.stop.main, dataset.stop.bottom],
// On the Top
4 : [leftX, 0, posX, -dataset.stop.main],
//On the Top Right Corner
5 : [dataset.size.zoomX, 0, dataset.stop.right, -dataset.stop.main],
//On the Right Side
6 : [dataset.size.zoomX, topY, dataset.stop.right, posY],
//On the Bottom Right Corner
7 : [dataset.size.zoomX, dataset.size.zoomY, dataset.stop.right, dataset.stop.bottom],
//On the Bottom
8 : [leftX, dataset.size.zoomY, posX, dataset.stop.bottom]
};
return fn[index];
},
// Move Zoom Cursor
move : function (ele, zoom, e) {
// need to stop as many of these variable in data object to avoid recalulation of variables
var id = zoom.attr('rel'),
l = ele.offset(),
dataset = ZoomyS[id],
yOffset = (touch) ? -70 : 0,
// only dynamic variables
posX = utils.pos.mouse(e.pageX, l.left , dataset.size.half),
posY = utils.pos.mouse(e.pageY + yOffset , l.top, dataset.size.half),
leftX = utils.pos.zoom(e.pageX, l.left, dataset.size.ratioX, dataset.size.half, ZoomyS[id].zoom.border),
topY = utils.pos.zoom(e.pageY + yOffset, l.top , dataset.size.ratioY, dataset.size.half, ZoomyS[id].zoom.border),
cssArrIndex = change.collision(posX, posY, dataset),
//Compile CSS object to move Zoomy
move = utils.css(change.possibilities(cssArrIndex, dataset, leftX, topY, posX, posY));
//Uncomment to see Index number for collision type
//console.log(cssArrIndex)
// And Actual Call
zoom.css(move);
},
// Change classes for original image effect
classes : function (ele) {
var i = ele.find('.zoomy').attr('rel');
if (ZoomyS[i].state === 0 || ZoomyS[i].state === null) {
ele.removeClass('inactive');
} else {
ele.addClass('inactive');
}
},
// Enter zoom area start up Zoom again
enter : function (ele, zoom) {
var i = zoom.attr('rel');
ZoomyS[i].state = 1;
zoom.css('visibility', 'visible');
change.classes(ele);
},
// Leave zoom area
leave : function (ele, zoom, x) {
var i = zoom.attr('rel');
if (x !== null) {
ZoomyS[i].state = null;
} else {
ZoomyS[i].state = 0;
}
zoom.css('visibility', 'hidden');
change.classes(ele);
},
// Callback handler (startZoom && stopZoom)
callback : function (type, zoom) {
var callbackFunc = type,
zoomId = zoom.attr('rel');
if (callbackFunc !== null && typeof callbackFunc === 'function') {
callbackFunc($.extend({}, ZoomyS[zoomId], ZoomyS.pos));
}
}
},
// Styling Object, holds pretty much all styling except for some minor tweeks
style = {
//getting border-radius
round : function (x, y) {
return (!options.round) ? 0 : ( x === undefined) ? '100%' : options.zoomSize / 2 + 'px ' + options.zoomSize / 2 + 'px 0px 0px';
},
//setting glare
glare : function (zoom) {
zoom
.children('span')
.css({
height : options.zoomSize / 2,
width : options.zoomSize - 10,
margin : '5px auto',
'border-radius' : style.round(0)
});
},
//getting border
border: function (zoom) {
var borderRaw = options.border.replace(/^\s*|\s*$/g,''),
borderArr = borderRaw.split(' '),
interger = parseFloat(borderArr[0]),
size = (borderArr.length > 2 && interger * 1 === interger ) ? interger : 0;
return [borderRaw, size];
},
// styling element appropiatly
params : function (ele, zoom) {
var img = ele.children('img'),
// TODO: Create function to filter out percents
border = style.border(zoom),
//margining
margin = {
'marginTop' : img.css('margin-top'),
'marginRight' : img.css('margin-right'),
'marginBottom' : img.css('margin-bottom'),
'marginLeft' : img.css('margin-left')
},
//floats
floats = {
'float': img.css('float')
},
//Zoomy needs these to work
zoomMin = {
'display': 'block',
height: img.height(),
width: img.width(),
'position': 'relative'
},
//Checking parent text align
parentCenter = function () {
//Checking for parent text-align center
var textAlign = ele.parent('*:first').css('text-align');
if (textAlign === 'center') {
margin.marginRight = 'auto';
margin.marginLeft = 'auto';
}
},
id = zoom.attr('rel'),
css = {};
if (floats['float'] === 'none') {
parentCenter();
}
$.extend(css, margin, floats, zoomMin);
ZoomyS[id].css = css;
if (!options.glare) {
if (options.fixed) {
zoom.children('span').css({
height : options.zoomSize - 10,
width : options.zoomSize - 10
});
} else {
zoom.children('span').css({
height : options.zoomSize - 10,
width : options.zoomSize - 10
});
}
}
if (options.fixed) {
zoom.css({
height : options.zoomSize,
width : options.zoomSize,
top : 0,
left : 0,
'border-radius' : style.round(undefined, border[1]),
border : border[0]
});
} else {
zoom.css({
height : options.zoomSize,
width : options.zoomSize,
top : 0,
left : 0,
'border-radius' : style.round(undefined, border[1]),
border : border[0]
});
}
img.css('margin', '0px');
img.one("load", function () {
ele.css(ZoomyS[id].css);
if(ele.parent('.zoomy-wrap').length){
ele.parent('.zoomy-wrap').css(ZoomyS[id].css);
}
}).each(function () {
if (this.complete) {
$(this).trigger("load");
}
});
}
},
// Build Object, Elements are added to the DOM here
build = {
// Load Zoom Image
image : function (image, zoom, callback) {
var id = zoom.attr('rel');
//Move the Zoomy out of the screen view while loading img
zoom.show().css({top:'-9999px', left: '-9999px'});
if (zoom.find('img').attr('src') !== image) {
zoom.find('img').attr('src', image).load(function () {
var assets = (options.glare) ? '<span/>' : '',
border = style.border(zoom);
ZoomyS[id].zoom = {
'x' : zoom.find('img').width(),
'y' : zoom.find('img').height(),
'border': border[1]
};
zoom.append(assets)
.css({
'background-image': 'url(' + image + ')',
top: '0px',
left: '0px',
visibility: 'hidden'
})
.find('img')
.remove();
style.glare(zoom);
utils.setParams(zoom);
callback();
}).each(function () {
if (this.complete) {
$(this).trigger("load");
}
});
}
},
// Add zoom element to page
zoom : function (ele, i) {
//Adding Initial State
ZoomyS[i] = {
state: null,
index : i
};
ZoomyS.count.push(0);
// Picking from the right attibute
var image = (typeof (ele.attr(options.attr)) === 'string' && options.attr !== 'href') ? ele.attr(options.attr) : ele.attr('href'),
zoom = null,
initCallback = options.zoomInit,
eventHandler = function () {
var eventlist = [], //List of Actual Events
//User Interface Device filter for touch and mouse
uid = {
move : (touch) ? 'touchmove' : 'mousemove',
begin : (touch) ? 'touchstart' : 'mouseover',
end : (touch) ? 'touchend' : 'mouseleave',
quick : (touch) ? 'tap' : 'click'
},
zoomMove = function (e, originalEvent) {
e = (touch) ? (originalEvent) ? originalEvent.touches[0] || originalEvent.changedTouches[0] : e.originalEvent.touches[0] || e.originalEvent.changedTouches[0] : e;
change.move(ele, zoom, e);
},
zoomStart = function () {
change.enter(ele, zoom);
ele.bind(uid.move, zoomMove);
/* Start Zoom Callback */
change.callback(options.zoomStart, zoom);
},
zoomStop = function (x) {
change.leave(ele, zoom, x);
ele.unbind(uid.move, zoomMove);
/* Start Zoom Callback */
change.callback(options.zoomStop, zoom);
},
//New handle to hold start
startHandle = function(e, originalEvent){
e = (touch) ? (originalEvent) ? originalEvent.touches[0] || originalEvent.changedTouches[0] : e.originalEvent.touches[0] || e.originalEvent.changedTouches[0] : e;
ZoomyS.pos = e;
if (ZoomyS[i].state === 0) {
zoomStart();
}
},
//New handle to hold stop
stopHandle = function(e){
ZoomyS.pos = e;
if (ZoomyS[i].state === 1) {
zoomStop(null);
}
},
//List of Possible Events
events = {
event: function (e) {
ZoomyS.pos = e;
if (!options.clickable) {
e.preventDefault();
}
if (ZoomyS[i].state === 0 || ZoomyS[i].state === null) {
zoomStart();
//Fix on click show and positioning issues
e = (touch && typeof e.originalEvent === 'object' ) ? e.originalEvent.changedTouches[0] || e.originalEvent.touches[0] : e;
change.move(ele, zoom, e);
} else if (ZoomyS[i].state === 1 && event !== 'mouseover' && event !== 'mouseenter') {
zoomStop(0);
}
},
'mouseover' : startHandle,
'mouseleave': stopHandle,
//New Added Events for touch
'touchstart': startHandle,
'touchend' : stopHandle,
'click' : function (e) {
e.preventDefault();
e.stopPropagation();
}
};
// Making sure there is only one mouse over event & Click returns false when it suppose to
if (event === 'mouseover' || event === 'touchstart') {
eventlist[event] = events.event;
} else {
eventlist[event] = events.event;
eventlist[uid.begin] = events[uid.begin];
}
if (!options.clickable && event !== 'click') {
eventlist.click = events.click;
}
eventlist[uid.end] = events[uid.end];
// Binding Events to element
if(touch){
// Handling Events a bit differntly
var count = 0,
btn = $('.zoomy-btn-' + i),
wrp = btn.parent('div'),
addEvents = function(e){
count = 0;
ele.bind(eventlist);
ele.trigger('touchstart', e.originalEvent);
ele.trigger('touchmove', e.originalEvent);
wrp.addClass('active');
},
removeEvents = function(){
wrp.removeClass('active');
ele.trigger('touchend');
ele.unbind(eventlist);
};
// TODO setup events so that the image cannot be clicked
btn.bind({
'touchstart': addEvents,
'touchmove': function(e){
var that = $(this);
count += 1;
ele.trigger('touchmove', e.originalEvent);
e.preventDefault();
setTimeout(function(){
if(count === 1){
that.trigger('touchend');
}
},200);
},'touchend': removeEvents
});
//Disabling taphold
document.oncontextmenu = function() {return false;};
$(document).mousedown(function(e){
if ( e.button === 2 ){
return false;
}
return true;
});
}else{
ele.bind(eventlist);
}
$(window).resize(function(){
ele
.attr('style', '')
.parent('.zoomy-wrap')
.attr('style', '');
window.setTimeout(function(){
style.params(ele, zoom);
}, 100);
});
},
//Add Button if is touch
magColor = '#efefef',
icon = '<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="40px" height="40px" viewBox="0 0 50 50" overflow="inherit" xml:space="preserve">\
<defs>\
<filter id="drop-shadow">\
<feGaussianBlur in="SourceAlpha" result="blur-out" stdDeviation="1" />\
<feOffset in="blur-out" result="the-shadow" dx="0" dy="1"/>\
<feBlend in="SourceGraphic" in2="the-shadow" mode="normal"/>\
</filter>\
</defs>\
<path filter="url(#drop-shadow)" fill="' + magColor + '" d="M23.265,30.324l-9.887,9.887l-3.64-3.641l9.942-9.941c-2.687-4.42-2.134-10.246,1.668-14.049 c4.469-4.469,11.732-4.451,16.224,0.04c4.491,4.491,4.509,11.754,0.04,16.224C33.723,32.732,27.718,33.223,23.265,30.324z M24.601,15.833c-2.681,2.681-2.67,7.039,0.024,9.733s7.053,2.705,9.733,0.025c2.682-2.681,2.671-7.04-0.023-9.734 C31.641,13.162,27.282,13.152,24.601,15.833z"/>\
</svg>',
button = (touch) ? ['<div class="zoomy-wrap" />', '<div class=" zoomy-btn zoomy-btn-' + i + '">' + icon + '</div>'] : ['', ''];
//Creating Zoomy Element
ele
.addClass('parent-zoom')
.wrap(button[0])
.append('<div class="zoomy zoom-obj-' + i + '" rel="' + i + '"><img id="tmp"/></div>' )
.after(button[1]);
//Setting the Zoom Variable towards the right zoom object
zoom = $('.zoom-obj-' + i);
if (initCallback !== null && typeof initCallback === 'function') {
initCallback(ele);
}
// Set basic parameters
style.params(ele, zoom);
// Load zoom image ~ now async
build.image(image, zoom, function(){
eventHandler();
});
},
// Initialize element to add to page, check for initial image to be loaded
init : function (ele, img) {
//Programmically make an img to have better results with loading
var nImg = $('<img />').attr('src', img.attr('src'));
// listen for a load
nImg.one("load", function () {
// Ready to build zoom
build.zoom(ele, ZoomyS.count.length);
}).each(function () {
if (this.complete) {
$(this).trigger("load");
}
});
}
};
//Fallback if there is no event but there are options
if (typeof (event) === 'object' && options === undefined) {
options = event;
event = defaultEvent;
} else if (event === undefined) {
event = defaultEvent;
}
//overriding defaults with options
options = $.extend(defaults, options);
$(this).each(function () {
var ele = $(this),
img = ele.find('img');
// Start Building Zoom
build.init(ele, img);
});
};
}(jQuery));