jquery.queryloader2.min.js

/*
 * QueryLoader v2 - A simple script to create a preloader for images
 *
 * For instructions read the original post:
 * http://www.gayadesign.com/diy/queryloader2-preload-your-images-with-ease/
 *
 * Copyright (c) 2011 - Gaya Kessler
 *
 * Licensed under the MIT license:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Version:  2.8.3
 * Last update: 2013-12-05
 */
!function(a){function b(a){this.parent=a,this.container,this.loadbar,this.percentageContainer}function c(a){this.toPreload=[],this.parent=a,this.container}function d(a){this.element,this.parent=a}function e(d,e){this.element=d,this.$element=a(d),this.options=e,this.foundUrls=[],this.destroyed=!1,this.imageCounter=0,this.imageDone=0,this.alreadyLoaded=!1,this.preloadContainer=new c(this),this.overlayLoader=new b(this),this.defaultOptions={onComplete:function(){},onLoadComplete:function(){},backgroundColor:"#000",barColor:"#fff",overlayId:"qLoverlay",barHeight:1,percentage:!1,deepSearch:!0,completeAnimation:"fade",minimumTime:500},this.init()}b.prototype.createOverlay=function(){var b="absolute";if("body"==this.parent.element.tagName.toLowerCase())b="fixed";else{var c=this.parent.$element.css("position");("fixed"!=c||"absolute"!=c)&&this.parent.$element.css("position","relative")}this.container=a("<div id='"+this.parent.options.overlayId+"'></div>").css({width:"100%",height:"100%",backgroundColor:this.parent.options.backgroundColor,backgroundPosition:"fixed",position:b,zIndex:666999,top:0,left:0}).appendTo(this.parent.$element),this.loadbar=a("<div id='qLbar'></div>").css({height:this.parent.options.barHeight+"px",marginTop:"-"+this.parent.options.barHeight/2+"px",backgroundColor:this.parent.options.barColor,width:"0%",position:"absolute",top:"50%"}).appendTo(this.container),1==this.parent.options.percentage&&(this.percentageContainer=a("<div id='qLpercentage'></div>").text("0%").css({height:"40px",width:"100px",position:"absolute",fontSize:"3em",top:"50%",left:"50%",marginTop:"-"+(59+this.parent.options.barHeight)+"px",textAlign:"center",marginLeft:"-50px",color:this.parent.options.barColor}).appendTo(this.container)),this.parent.preloadContainer.toPreload.length&&1!=this.parent.alreadyLoaded||this.parent.destroyContainers()},b.prototype.updatePercentage=function(a){this.loadbar.stop().animate({width:a+"%",minWidth:a+"%"},200),1==this.parent.options.percentage&&this.percentageContainer.text(Math.ceil(a)+"%")},c.prototype.create=function(){this.container=a("<div></div>").appendTo("body").css({display:"none",width:0,height:0,overflow:"hidden"}),this.processQueue()},c.prototype.processQueue=function(){for(var a=0;this.toPreload.length>a;a++)this.parent.destroyed||this.preloadImage(this.toPreload[a])},c.prototype.addImage=function(a){this.toPreload.push(a)},c.prototype.preloadImage=function(a){var b=new d;b.addToPreloader(this,a),b.bindLoadEvent()},d.prototype.addToPreloader=function(b,c){this.element=a("<img />").attr("src",c),this.element.appendTo(b.container),this.parent=b.parent},d.prototype.bindLoadEvent=function(){this.parent.imageCounter++;var a=this.element.attr("src");this.element.removeAttr("src");var b=this;setTimeout(function(){b.element.on("load error",b,function(a){a.data.completeLoading()}),b.element.attr("src",a)},1)},d.prototype.completeLoading=function(){this.parent.imageDone++;var a=100*(this.parent.imageDone/this.parent.imageCounter);this.parent.overlayLoader.updatePercentage(a),this.parent.imageDone==this.parent.imageCounter&&this.parent.endLoader()},e.prototype.init=function(){if(this.options=a.extend({},this.defaultOptions,this.options),this.findImageInElement(this.element),1==this.options.deepSearch)for(var b=this.$element.find("*:not(script)"),c=0;c<b.length;c++)this.findImageInElement(b[c]);this.preloadContainer.create(),this.overlayLoader.createOverlay()},e.prototype.findImageInElement=function(b){var c="",e=a(b),f="normal";if("none"!=e.css("background-image")?(c=e.css("background-image"),f="background"):"undefined"!=typeof e.attr("src")&&"img"==b.nodeName.toLowerCase()&&(c=e.attr("src")),!this.hasGradient(c)){c=this.stripUrl(c);for(var g=c.split(", "),h=0;h<g.length;h++)if(this.validUrl(g[h])&&this.urlIsNew(g[h])){var i="";if(this.isIE()||this.isOpera())i="?rand="+Math.random(),this.preloadContainer.addImage(g[h]+i);else if("background"==f)this.preloadContainer.addImage(g[h]+i);else{var j=new d(this);j.element=e,j.bindLoadEvent()}this.foundUrls.push(g[h])}}},e.prototype.hasGradient=function(a){return-1==a.indexOf("gradient")?!1:!0},e.prototype.stripUrl=function(a){return a=a.replace(/url\(\"/g,""),a=a.replace(/url\(/g,""),a=a.replace(/\"\)/g,""),a=a.replace(/\)/g,"")},e.prototype.isIE=function(){return navigator.userAgent.match(/msie/i)},e.prototype.isOpera=function(){return navigator.userAgent.match(/Opera/i)},e.prototype.validUrl=function(a){return a.length>0&&!a.match(/^(data:)/i)?!0:!1},e.prototype.urlIsNew=function(a){return-1==this.foundUrls.indexOf(a)?!0:!1},e.prototype.destroyContainers=function(){this.destroyed=!0,this.preloadContainer.container.remove(),this.overlayLoader.container.remove()},e.prototype.endLoader=function(){this.destroyed=!0,this.onLoadComplete()},e.prototype.onLoadComplete=function(){if(this.options.onLoadComplete(),"grow"==this.options.completeAnimation){var b=this.options.minimumTime;this.overlayLoader.loadbar[0].parent=this,this.overlayLoader.loadbar.stop().animate({width:"100%"},b,function(){a(this).animate({top:"0%",width:"100%",height:"100%"},500,function(){this.parent.overlayLoader.container[0].parent=this.parent,this.parent.overlayLoader.container.fadeOut(500,function(){this.parent.destroyContainers(),this.parent.options.onComplete()})})})}else this.overlayLoader.container[0].parent=this,this.overlayLoader.container.fadeOut(500,function(){this.parent.destroyContainers(),this.parent.options.onComplete()})},Array.prototype.indexOf||(Array.prototype.indexOf=function(a){var b=this.length>>>0,c=Number(arguments[1])||0;for(c=0>c?Math.ceil(c):Math.floor(c),0>c&&(c+=b);b>c;c++)if(c in this&&this[c]===a)return c;return-1}),a.fn.queryLoader2=function(a){return this.each(function(){new e(this,a)})}}(jQuery);