info@54: /*
info@54: 
info@54: Holder - 2.2 - client side image placeholders
info@54: (c) 2012-2013 Ivan Malopinsky / http://imsky.co
info@54: 
info@54: Provided under the MIT License.
info@54: Commercial use requires attribution.
info@54: 
info@54: */
info@54: 
info@54: var Holder = Holder || {};
info@54: (function (app, win) {
info@54: 
info@54: var preempted = false,
info@54: fallback = false,
info@54: canvas = document.createElement('canvas');
info@54: var dpr = 1, bsr = 1;
info@54: var resizable_images = [];
info@54: 
info@54: if (!canvas.getContext) {
info@54: 	fallback = true;
info@54: } else {
info@54: 	if (canvas.toDataURL("image/png")
info@54: 		.indexOf("data:image/png") < 0) {
info@54: 		//Android doesn't support data URI
info@54: 		fallback = true;
info@54: 	} else {
info@54: 		var ctx = canvas.getContext("2d");
info@54: 	}
info@54: }
info@54: 
info@54: if(!fallback){
info@54:     dpr = window.devicePixelRatio || 1,
info@54:     bsr = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1;
info@54: }
info@54: 
info@54: var ratio = dpr / bsr;
info@54: 
info@54: var settings = {
info@54: 	domain: "holder.js",
info@54: 	images: "img",
info@54: 	bgnodes: ".holderjs",
info@54: 	themes: {
info@54: 		"gray": {
info@54: 			background: "#eee",
info@54: 			foreground: "#aaa",
info@54: 			size: 12
info@54: 		},
info@54: 		"social": {
info@54: 			background: "#3a5a97",
info@54: 			foreground: "#fff",
info@54: 			size: 12
info@54: 		},
info@54: 		"industrial": {
info@54: 			background: "#434A52",
info@54: 			foreground: "#C2F200",
info@54: 			size: 12
info@54: 		},
info@54: 		"sky": {
info@54: 			background: "#0D8FDB",
info@54: 			foreground: "#fff",
info@54: 			size: 12
info@54: 		},
info@54: 		"vine": {
info@54: 			background: "#39DBAC",
info@54: 			foreground: "#1E292C",
info@54: 			size: 12
info@54: 		},
info@54: 		"lava": {
info@54: 			background: "#F8591A",
info@54: 			foreground: "#1C2846",
info@54: 			size: 12
info@54: 		}
info@54: 	},
info@54: 	stylesheet: ""
info@54: };
info@54: app.flags = {
info@54: 	dimensions: {
info@54: 		regex: /^(\d+)x(\d+)$/,
info@54: 		output: function (val) {
info@54: 			var exec = this.regex.exec(val);
info@54: 			return {
info@54: 				width: +exec[1],
info@54: 				height: +exec[2]
info@54: 			}
info@54: 		}
info@54: 	},
info@54: 	fluid: {
info@54: 		regex: /^([0-9%]+)x([0-9%]+)$/,
info@54: 		output: function (val) {
info@54: 			var exec = this.regex.exec(val);
info@54: 			return {
info@54: 				width: exec[1],
info@54: 				height: exec[2]
info@54: 			}
info@54: 		}
info@54: 	},
info@54: 	colors: {
info@54: 		regex: /#([0-9a-f]{3,})\:#([0-9a-f]{3,})/i,
info@54: 		output: function (val) {
info@54: 			var exec = this.regex.exec(val);
info@54: 			return {
info@54: 				size: settings.themes.gray.size,
info@54: 				foreground: "#" + exec[2],
info@54: 				background: "#" + exec[1]
info@54: 			}
info@54: 		}
info@54: 	},
info@54: 	text: {
info@54: 		regex: /text\:(.*)/,
info@54: 		output: function (val) {
info@54: 			return this.regex.exec(val)[1];
info@54: 		}
info@54: 	},
info@54: 	font: {
info@54: 		regex: /font\:(.*)/,
info@54: 		output: function (val) {
info@54: 			return this.regex.exec(val)[1];
info@54: 		}
info@54: 	},
info@54: 	auto: {
info@54: 		regex: /^auto$/
info@54: 	},
info@54: 	textmode: {
info@54: 		regex: /textmode\:(.*)/,
info@54: 		output: function(val){
info@54: 			return this.regex.exec(val)[1];
info@54: 		}
info@54: 	}
info@54: }
info@54: 
info@54: //getElementsByClassName polyfill
info@54: document.getElementsByClassName||(document.getElementsByClassName=function(e){var t=document,n,r,i,s=[];if(t.querySelectorAll)return t.querySelectorAll("."+e);if(t.evaluate){r=".//*[contains(concat(' ', @class, ' '), ' "+e+" ')]",n=t.evaluate(r,t,null,0,null);while(i=n.iterateNext())s.push(i)}else{n=t.getElementsByTagName("*"),r=new RegExp("(^|\\s)"+e+"(\\s|$)");for(i=0;i<n.length;i++)r.test(n[i].className)&&s.push(n[i])}return s})
info@54: 
info@54: //getComputedStyle polyfill
info@54: window.getComputedStyle||(window.getComputedStyle=function(e){return this.el=e,this.getPropertyValue=function(t){var n=/(\-([a-z]){1})/g;return t=="float"&&(t="styleFloat"),n.test(t)&&(t=t.replace(n,function(){return arguments[2].toUpperCase()})),e.currentStyle[t]?e.currentStyle[t]:null},this})
info@54: 
info@54: //http://javascript.nwbox.com/ContentLoaded by Diego Perini with modifications
info@54: function contentLoaded(n,t){var l="complete",s="readystatechange",u=!1,h=u,c=!0,i=n.document,a=i.documentElement,e=i.addEventListener?"addEventListener":"attachEvent",v=i.addEventListener?"removeEventListener":"detachEvent",f=i.addEventListener?"":"on",r=function(e){(e.type!=s||i.readyState==l)&&((e.type=="load"?n:i)[v](f+e.type,r,u),!h&&(h=!0)&&t.call(n,null))},o=function(){try{a.doScroll("left")}catch(n){setTimeout(o,50);return}r("poll")};if(i.readyState==l)t.call(n,"lazy");else{if(i.createEventObject&&a.doScroll){try{c=!n.frameElement}catch(y){}c&&o()}i[e](f+"DOMContentLoaded",r,u),i[e](f+s,r,u),n[e](f+"load",r,u)}}
info@54: 
info@54: //https://gist.github.com/991057 by Jed Schmidt with modifications
info@54: function selector(a){
info@54: 	a=a.match(/^(\W)?(.*)/);var b=document["getElement"+(a[1]?a[1]=="#"?"ById":"sByClassName":"sByTagName")](a[2]);
info@54: 	var ret=[];	b!==null&&(b.length?ret=b:b.length===0?ret=b:ret=[b]);	return ret;
info@54: }
info@54: 
info@54: //shallow object property extend
info@54: function extend(a,b){
info@54: 	var c={};
info@54: 	for(var i in a){
info@54: 		if(a.hasOwnProperty(i)){
info@54: 			c[i]=a[i];
info@54: 		}
info@54: 	}
info@54: 	for(var i in b){
info@54: 		if(b.hasOwnProperty(i)){
info@54: 			c[i]=b[i];
info@54: 		}
info@54: 	}
info@54: 	return c
info@54: }
info@54: 
info@54: //hasOwnProperty polyfill
info@54: if (!Object.prototype.hasOwnProperty)
info@54:     /*jshint -W001, -W103 */
info@54:     Object.prototype.hasOwnProperty = function(prop) {
info@54: 		var proto = this.__proto__ || this.constructor.prototype;
info@54: 		return (prop in this) && (!(prop in proto) || proto[prop] !== this[prop]);
info@54: 	}
info@54:     /*jshint +W001, +W103 */
info@54: 
info@54: function text_size(width, height, template) {
info@54: 	height = parseInt(height, 10);
info@54: 	width = parseInt(width, 10);
info@54: 	var bigSide = Math.max(height, width)
info@54: 	var smallSide = Math.min(height, width)
info@54: 	var scale = 1 / 12;
info@54: 	var newHeight = Math.min(smallSide * 0.75, 0.75 * bigSide * scale);
info@54: 	return {
info@54: 		height: Math.round(Math.max(template.size, newHeight))
info@54: 	}
info@54: }
info@54: 
info@54: function draw(args) {
info@54: 	var ctx = args.ctx;
info@54: 	var dimensions = args.dimensions;
info@54: 	var template = args.template;
info@54: 	var ratio = args.ratio;
info@54: 	var holder = args.holder;
info@54: 	var literal = holder.textmode == "literal";
info@54: 	var exact = holder.textmode == "exact";
info@54: 
info@54: 	var ts = text_size(dimensions.width, dimensions.height, template);
info@54: 	var text_height = ts.height;
info@54: 	var width = dimensions.width * ratio,
info@54: 		height = dimensions.height * ratio;
info@54: 	var font = template.font ? template.font : "sans-serif";
info@54: 	canvas.width = width;
info@54: 	canvas.height = height;
info@54: 	ctx.textAlign = "center";
info@54: 	ctx.textBaseline = "middle";
info@54: 	ctx.fillStyle = template.background;
info@54: 	ctx.fillRect(0, 0, width, height);
info@54: 	ctx.fillStyle = template.foreground;
info@54: 	ctx.font = "bold " + text_height + "px " + font;
info@54: 	var text = template.text ? template.text : (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height));
info@54: 	if (literal) {
info@54: 		var dimensions = holder.dimensions;
info@54: 		text = dimensions.width + "x" + dimensions.height;
info@54: 	}
info@54: 	else if(exact && holder.exact_dimensions){
info@54: 		var dimensions = holder.exact_dimensions;
info@54: 		text = (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height));
info@54: 	}
info@54: 	var text_width = ctx.measureText(text).width;
info@54: 	if (text_width / width >= 0.75) {
info@54: 		text_height = Math.floor(text_height * 0.75 * (width / text_width));
info@54: 	}
info@54: 	//Resetting font size if necessary
info@54: 	ctx.font = "bold " + (text_height * ratio) + "px " + font;
info@54: 	ctx.fillText(text, (width / 2), (height / 2), width);
info@54: 	return canvas.toDataURL("image/png");
info@54: }
info@54: 
info@54: function render(mode, el, holder, src) {
info@54: 	
info@54: 	var dimensions = holder.dimensions,
info@54: 		theme = holder.theme,
info@54: 		text = holder.text ? decodeURIComponent(holder.text) : holder.text;
info@54: 	var dimensions_caption = dimensions.width + "x" + dimensions.height;
info@54: 	theme = (text ? extend(theme, {
info@54: 		text: text
info@54: 	}) : theme);
info@54: 	theme = (holder.font ? extend(theme, {
info@54: 		font: holder.font
info@54: 	}) : theme);
info@54: 	el.setAttribute("data-src", src);
info@54: 	holder.theme = theme;
info@54: 	el.holder_data = holder;
info@54: 	
info@54: 	if (mode == "image") {
info@54: 		el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption);
info@54: 		if (fallback || !holder.auto) {
info@54: 			el.style.width = dimensions.width + "px";
info@54: 			el.style.height = dimensions.height + "px";
info@54: 		}
info@54: 		if (fallback) {
info@54: 			el.style.backgroundColor = theme.background;
info@54: 		} else {
info@54: 			el.setAttribute("src", draw({ctx: ctx, dimensions: dimensions, template: theme, ratio:ratio, holder: holder}));
info@54: 			
info@54: 			if(holder.textmode && holder.textmode == "exact"){
info@54: 				resizable_images.push(el);
info@54: 				resizable_update(el);
info@54: 			}
info@54: 			
info@54: 		}
info@54: 	} else if (mode == "background") {
info@54: 		if (!fallback) {
info@54: 			el.style.backgroundImage = "url(" + draw({ctx:ctx, dimensions: dimensions, template: theme, ratio: ratio, holder: holder}) + ")";
info@54: 			el.style.backgroundSize = dimensions.width + "px " + dimensions.height + "px";
info@54: 		}
info@54: 	} else if (mode == "fluid") {
info@54: 		el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption);
info@54: 		if (dimensions.height.slice(-1) == "%") {
info@54: 			el.style.height = dimensions.height
info@54: 		} else {
info@54: 			el.style.height = dimensions.height + "px"
info@54: 		}
info@54: 		if (dimensions.width.slice(-1) == "%") {
info@54: 			el.style.width = dimensions.width
info@54: 		} else {
info@54: 			el.style.width = dimensions.width + "px"
info@54: 		}
info@54: 		if (el.style.display == "inline" || el.style.display === "" || el.style.display == "none") {
info@54: 			el.style.display = "block";
info@54: 		}
info@54: 		if (fallback) {
info@54: 			el.style.backgroundColor = theme.background;
info@54: 		} else {
info@54: 			resizable_images.push(el);
info@54: 			resizable_update(el);
info@54: 		}
info@54: 	}
info@54: }
info@54: 
info@54: function dimension_check(el, callback) {
info@54: 	var dimensions = {
info@54: 		height: el.clientHeight,
info@54: 		width: el.clientWidth
info@54: 	};
info@54: 	if (!dimensions.height && !dimensions.width) {
info@54: 		if (el.hasAttribute("data-holder-invisible")) {
info@54: 			throw new Error("Holder: placeholder is not visible");
info@54: 		} else {
info@54: 			el.setAttribute("data-holder-invisible", true)
info@54: 			setTimeout(function () {
info@54: 				callback.call(this, el)
info@54: 			}, 1)
info@54: 			return null;
info@54: 		}
info@54: 	} else {
info@54: 		el.removeAttribute("data-holder-invisible")
info@54: 	}
info@54: 	return dimensions;
info@54: }
info@54: 
info@54: function resizable_update(element) {
info@54: 	var images;
info@54: 	if (element.nodeType == null) {
info@54: 		images = resizable_images;
info@54: 	} else {
info@54: 		images = [element]
info@54: 	}
info@54: 	for (var i in images) {
info@54: 		if (!images.hasOwnProperty(i)) {
info@54: 			continue;
info@54: 		}
info@54: 		var el = images[i]
info@54: 		if (el.holder_data) {
info@54: 			var holder = el.holder_data;
info@54: 			var dimensions = dimension_check(el, resizable_update)
info@54: 			if(dimensions){
info@54: 				if(holder.fluid){
info@54: 					el.setAttribute("src", draw({
info@54: 						ctx: ctx,
info@54: 						dimensions: dimensions,
info@54: 						template: holder.theme,
info@54: 						ratio: ratio,
info@54: 						holder: holder
info@54: 					}))
info@54: 				}
info@54: 				if(holder.textmode && holder.textmode == "exact"){
info@54: 					holder.exact_dimensions = dimensions;
info@54: 					el.setAttribute("src", draw({
info@54: 						ctx: ctx,
info@54: 						dimensions: holder.dimensions,
info@54: 						template: holder.theme,
info@54: 						ratio: ratio,
info@54: 						holder: holder
info@54: 					}))
info@54: 				}
info@54: 			}
info@54: 		}
info@54: 	}
info@54: }
info@54: 
info@54: function parse_flags(flags, options) {
info@54: 	var ret = {
info@54: 		theme: extend(settings.themes.gray, {})
info@54: 	};
info@54: 	var render = false;
info@54: 	for (sl = flags.length, j = 0; j < sl; j++) {
info@54: 		var flag = flags[j];
info@54: 		if (app.flags.dimensions.match(flag)) {
info@54: 			render = true;
info@54: 			ret.dimensions = app.flags.dimensions.output(flag);
info@54: 		} else if (app.flags.fluid.match(flag)) {
info@54: 			render = true;
info@54: 			ret.dimensions = app.flags.fluid.output(flag);
info@54: 			ret.fluid = true;
info@54: 		} else if (app.flags.textmode.match(flag)) {
info@54: 			ret.textmode = app.flags.textmode.output(flag)
info@54: 		} else if (app.flags.colors.match(flag)) {
info@54: 			ret.theme = app.flags.colors.output(flag);
info@54: 		} else if (options.themes[flag]) {
info@54: 			//If a theme is specified, it will override custom colors
info@54: 			if(options.themes.hasOwnProperty(flag)){
info@54: 				ret.theme = extend(options.themes[flag], {});
info@54: 			}
info@54: 		} else if (app.flags.font.match(flag)) {
info@54: 			ret.font = app.flags.font.output(flag);
info@54: 		} else if (app.flags.auto.match(flag)) {
info@54: 			ret.auto = true;
info@54: 		} else if (app.flags.text.match(flag)) {
info@54: 			ret.text = app.flags.text.output(flag);
info@54: 		}
info@54: 	}
info@54: 	return render ? ret : false;
info@54: }
info@54: 
info@54: for (var flag in app.flags) {
info@54: 	if (!app.flags.hasOwnProperty(flag)) continue;
info@54: 	app.flags[flag].match = function (val) {
info@54: 		return val.match(this.regex)
info@54: 	}
info@54: }
info@54: app.add_theme = function (name, theme) {
info@54: 	name != null && theme != null && (settings.themes[name] = theme);
info@54: 	return app;
info@54: };
info@54: app.add_image = function (src, el) {
info@54: 	var node = selector(el);
info@54: 	if (node.length) {
info@54: 		for (var i = 0, l = node.length; i < l; i++) {
info@54: 			var img = document.createElement("img")
info@54: 			img.setAttribute("data-src", src);
info@54: 			node[i].appendChild(img);
info@54: 		}
info@54: 	}
info@54: 	return app;
info@54: };
info@54: app.run = function (o) {
info@54: 	preempted = true;
info@54: 	
info@54: 	var options = extend(settings, o),
info@54: 		images = [],
info@54: 		imageNodes = [],
info@54: 		bgnodes = [];
info@54: 	if (typeof (options.images) == "string") {
info@54: 		imageNodes = selector(options.images);
info@54: 	} else if (window.NodeList && options.images instanceof window.NodeList) {
info@54: 		imageNodes = options.images;
info@54: 	} else if (window.Node && options.images instanceof window.Node) {
info@54: 		imageNodes = [options.images];
info@54: 	}
info@54: 	
info@54: 	if (typeof (options.bgnodes) == "string") {
info@54: 		bgnodes = selector(options.bgnodes);
info@54: 	} else if (window.NodeList && options.elements instanceof window.NodeList) {
info@54: 		bgnodes = options.bgnodes;
info@54: 	} else if (window.Node && options.bgnodes instanceof window.Node) {
info@54: 		bgnodes = [options.bgnodes];
info@54: 	}
info@54: 	for (i = 0, l = imageNodes.length; i < l; i++) images.push(imageNodes[i]);
info@54: 	var holdercss = document.getElementById("holderjs-style");
info@54: 	if (!holdercss) {
info@54: 		holdercss = document.createElement("style");
info@54: 		holdercss.setAttribute("id", "holderjs-style");
info@54: 		holdercss.type = "text/css";
info@54: 		document.getElementsByTagName("head")[0].appendChild(holdercss);
info@54: 	}
info@54: 	if (!options.nocss) {
info@54: 		if (holdercss.styleSheet) {
info@54: 			holdercss.styleSheet.cssText += options.stylesheet;
info@54: 		} else {
info@54: 			holdercss.appendChild(document.createTextNode(options.stylesheet));
info@54: 		}
info@54: 	}
info@54: 	var cssregex = new RegExp(options.domain + "\/(.*?)\"?\\)");
info@54: 	for (var l = bgnodes.length, i = 0; i < l; i++) {
info@54: 		var src = window.getComputedStyle(bgnodes[i], null)
info@54: 			.getPropertyValue("background-image");
info@54: 		var flags = src.match(cssregex);
info@54: 		var bgsrc = bgnodes[i].getAttribute("data-background-src");
info@54: 		if (flags) {
info@54: 			var holder = parse_flags(flags[1].split("/"), options);
info@54: 			if (holder) {
info@54: 				render("background", bgnodes[i], holder, src);
info@54: 			}
info@54: 		} else if (bgsrc != null) {
info@54: 			var holder = parse_flags(bgsrc.substr(bgsrc.lastIndexOf(options.domain) + options.domain.length + 1)
info@54: 				.split("/"), options);
info@54: 			if (holder) {
info@54: 				render("background", bgnodes[i], holder, src);
info@54: 			}
info@54: 		}
info@54: 	}
info@54: 	for (l = images.length, i = 0; i < l; i++) {
info@54: 		var attr_data_src, attr_src;
info@54: 		attr_src = attr_data_src = src = null;
info@54: 		try {
info@54: 			attr_src = images[i].getAttribute("src");
info@54: 			attr_datasrc = images[i].getAttribute("data-src");
info@54: 		} catch (e) {}
info@54: 		if (attr_datasrc == null && !! attr_src && attr_src.indexOf(options.domain) >= 0) {
info@54: 			src = attr_src;
info@54: 		} else if ( !! attr_datasrc && attr_datasrc.indexOf(options.domain) >= 0) {
info@54: 			src = attr_datasrc;
info@54: 		}
info@54: 		if (src) {
info@54: 			var holder = parse_flags(src.substr(src.lastIndexOf(options.domain) + options.domain.length + 1)
info@54: 				.split("/"), options);
info@54: 			if (holder) {
info@54: 				if (holder.fluid) {
info@54: 					render("fluid", images[i], holder, src)
info@54: 				} else {
info@54: 					render("image", images[i], holder, src);
info@54: 				}
info@54: 			}
info@54: 		}
info@54: 	}
info@54: 	return app;
info@54: };
info@54: contentLoaded(win, function () {
info@54: 	if (window.addEventListener) {
info@54: 		window.addEventListener("resize", resizable_update, false);
info@54: 		window.addEventListener("orientationchange", resizable_update, false);
info@54: 	} else {
info@54: 		window.attachEvent("onresize", resizable_update)
info@54: 	}
info@54: 	preempted || app.run();
info@54: });
info@54: if (typeof define === "function" && define.amd) {
info@54: 	define([], function () {
info@54: 		return app;
info@54: 	});
info@54: }
info@54: 
info@54: })(Holder, window);