upgrade holder.js to v2.1

docs-assets/js/holder.js

 /*
 
-Holder - 2.0 - client side image placeholders
+Holder - 2.1 - client side image placeholders
 (c) 2012-2013 Ivan Malopinsky / http://imsky.co
 
-Provided under the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
+Provided under the MIT License.
 Commercial use requires attribution.
 
 */
@@ -15,19 +15,40 @@ var preempted = false,
 fallback = false,
 canvas = document.createElement('canvas');
 
+if (!canvas.getContext) {
+	fallback = true;
+} else {
+	if (canvas.toDataURL("image/png")
+		.indexOf("data:image/png") < 0) {
+		//Android doesn't support data URI
+		fallback = true;
+	} else {
+		var ctx = canvas.getContext("2d");
+	}
+}
+
+var dpr = 1, bsr = 1;
+	
+if(!fallback){
+    dpr = window.devicePixelRatio || 1,
+    bsr = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1;
+}
+
+var ratio = dpr / bsr;
+
 //getElementsByClassName polyfill
 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})
 
 //getComputedStyle polyfill
-window.getComputedStyle||(window.getComputedStyle=function(e,t){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})
+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})
 
 //http://javascript.nwbox.com/ContentLoaded by Diego Perini with modifications
-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)}};
+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)}}
 
 //https://gist.github.com/991057 by Jed Schmidt with modifications
 function selector(a){
 	a=a.match(/^(\W)?(.*)/);var b=document["getElement"+(a[1]?a[1]=="#"?"ById":"sByClassName":"sByTagName")](a[2]);
-	var ret=[];	b!=null&&(b.length?ret=b:b.length==0?ret=b:ret=[b]);	return ret;
+	var ret=[];	b!==null&&(b.length?ret=b:b.length===0?ret=b:ret=[b]);	return ret;
 }
 
 //shallow object property extend
@@ -35,14 +56,16 @@ function extend(a,b){var c={};for(var d in a)c[d]=a[d];for(var e in b)c[e]=b[e];
 
 //hasOwnProperty polyfill
 if (!Object.prototype.hasOwnProperty)
-	Object.prototype.hasOwnProperty = function(prop) {
+    /*jshint -W001, -W103 */
+    Object.prototype.hasOwnProperty = function(prop) {
 		var proto = this.__proto__ || this.constructor.prototype;
 		return (prop in this) && (!(prop in proto) || proto[prop] !== this[prop]);
 	}
+    /*jshint +W001, +W103 */
 
 function text_size(width, height, template) {
-	height = parseInt(height,10);
-	width = parseInt(width,10);
+	height = parseInt(height, 10);
+	width = parseInt(width, 10);
 	var bigSide = Math.max(height, width)
 	var smallSide = Math.min(height, width)
 	var scale = 1 / 12;
@@ -52,7 +75,7 @@ function text_size(width, height, template) {
 	}
 }
 
-function draw(ctx, dimensions, template, ratio) {
+function draw(ctx, dimensions, template, ratio, literal) {
 	var ts = text_size(dimensions.width, dimensions.height, template);
 	var text_height = ts.height;
 	var width = dimensions.width * ratio,
@@ -67,9 +90,12 @@ function draw(ctx, dimensions, template, ratio) {
 	ctx.fillStyle = template.foreground;
 	ctx.font = "bold " + text_height + "px " + font;
 	var text = template.text ? template.text : (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height));
+	if (literal) {
+		text = template.literalText;
+	}
 	var text_width = ctx.measureText(text).width;
 	if (text_width / width >= 0.75) {
-		text_height = Math.floor(text_height * 0.75 * (width/text_width));
+		text_height = Math.floor(text_height * 0.75 * (width / text_width));
 	}
 	//Resetting font size if necessary
 	ctx.font = "bold " + (text_height * ratio) + "px " + font;
@@ -88,8 +114,12 @@ function render(mode, el, holder, src) {
 	theme = (holder.font ? extend(theme, {
 		font: holder.font
 	}) : theme);
+	el.setAttribute("data-src", src);
+	theme.literalText = dimensions_caption;
+	holder.originalTheme = holder.theme;
+	holder.theme = theme;
+
 	if (mode == "image") {
-		el.setAttribute("data-src", src);
 		el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption);
 		if (fallback || !holder.auto) {
 			el.style.width = dimensions.width + "px";
@@ -106,19 +136,18 @@ function render(mode, el, holder, src) {
 			el.style.backgroundSize = dimensions.width + "px " + dimensions.height + "px";
 		}
 	} else if (mode == "fluid") {
-		el.setAttribute("data-src", src);
 		el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption);
-		if (dimensions.height.substr(-1) == "%") {
+		if (dimensions.height.slice(-1) == "%") {
 			el.style.height = dimensions.height
 		} else {
 			el.style.height = dimensions.height + "px"
 		}
-		if (dimensions.width.substr(-1) == "%") {
+		if (dimensions.width.slice(-1) == "%") {
 			el.style.width = dimensions.width
 		} else {
 			el.style.width = dimensions.width + "px"
 		}
-		if (el.style.display == "inline" || el.style.display == "") {
+		if (el.style.display == "inline" || el.style.display === "") {
 			el.style.display = "block";
 		}
 		if (fallback) {
@@ -129,7 +158,7 @@ function render(mode, el, holder, src) {
 			fluid_update(el);
 		}
 	}
-};
+}
 
 function fluid_update(element) {
 	var images;
@@ -138,24 +167,23 @@ function fluid_update(element) {
 	} else {
 		images = [element]
 	}
-	for (i in images) {
+	for (var i in images) {
 		var el = images[i]
 		if (el.holderData) {
 			var holder = el.holderData;
 			el.setAttribute("src", draw(ctx, {
 				height: el.clientHeight,
 				width: el.clientWidth
-			}, holder.theme, ratio));
+			}, holder.theme, ratio, !! holder.literal));
 		}
 	}
 }
 
 function parse_flags(flags, options) {
-
 	var ret = {
 		theme: settings.themes.gray
-	}, render = false;
-
+	};
+	var render = false;
 	for (sl = flags.length, j = 0; j < sl; j++) {
 		var flag = flags[j];
 		if (app.flags.dimensions.match(flag)) {
@@ -165,49 +193,24 @@ function parse_flags(flags, options) {
 			render = true;
 			ret.dimensions = app.flags.fluid.output(flag);
 			ret.fluid = true;
+		} else if (app.flags.literal.match(flag)) {
+			ret.literal = true;
 		} else if (app.flags.colors.match(flag)) {
 			ret.theme = app.flags.colors.output(flag);
 		} else if (options.themes[flag]) {
 			//If a theme is specified, it will override custom colors
 			ret.theme = options.themes[flag];
-		} else if (app.flags.text.match(flag)) {
-			ret.text = app.flags.text.output(flag);
 		} else if (app.flags.font.match(flag)) {
 			ret.font = app.flags.font.output(flag);
 		} else if (app.flags.auto.match(flag)) {
 			ret.auto = true;
+		} else if (app.flags.text.match(flag)) {
+			ret.text = app.flags.text.output(flag);
 		}
 	}
-
 	return render ? ret : false;
-
-};
-
-
-
-if (!canvas.getContext) {
-	fallback = true;
-} else {
-	if (canvas.toDataURL("image/png")
-		.indexOf("data:image/png") < 0) {
-		//Android doesn't support data URI
-		fallback = true;
-	} else {
-		var ctx = canvas.getContext("2d");
-	}
 }
-
-var dpr = 1, bsr = 1;
-	
-if(!fallback){
-    dpr = window.devicePixelRatio || 1,
-    bsr = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1;
-}
-
-var ratio = dpr / bsr;
-
 var fluid_images = [];
-
 var settings = {
 	domain: "holder.js",
 	images: "img",
@@ -229,10 +232,8 @@ var settings = {
 			size: 12
 		}
 	},
-	stylesheet: ".holderjs-fluid {font-size:16px;font-weight:bold;text-align:center;font-family:sans-serif;margin:0}"
+	stylesheet: ""
 };
-
-
 app.flags = {
 	dimensions: {
 		regex: /^(\d+)x(\d+)$/,
@@ -279,21 +280,21 @@ app.flags = {
 	},
 	auto: {
 		regex: /^auto$/
+	},
+	literal: {
+		regex: /^literal$/
 	}
 }
-
 for (var flag in app.flags) {
 	if (!app.flags.hasOwnProperty(flag)) continue;
 	app.flags[flag].match = function (val) {
 		return val.match(this.regex)
 	}
 }
-
 app.add_theme = function (name, theme) {
 	name != null && theme != null && (settings.themes[name] = theme);
 	return app;
 };
-
 app.add_image = function (src, el) {
 	var node = selector(el);
 	if (node.length) {
@@ -305,32 +306,27 @@ app.add_image = function (src, el) {
 	}
 	return app;
 };
-
 app.run = function (o) {
 	var options = extend(settings, o),
-	    images = [], imageNodes = [], bgnodes = [];
-	    
-	if(typeof(options.images) == "string"){
-	    imageNodes = selector(options.images);
-	}
-	else if (window.NodeList && options.images instanceof window.NodeList) {
+		images = [],
+		imageNodes = [],
+		bgnodes = [];
+	if (typeof (options.images) == "string") {
+		imageNodes = selector(options.images);
+	} else if (window.NodeList && options.images instanceof window.NodeList) {
 		imageNodes = options.images;
 	} else if (window.Node && options.images instanceof window.Node) {
 		imageNodes = [options.images];
 	}
-
-	if(typeof(options.bgnodes) == "string"){
-	    bgnodes = selector(options.bgnodes);
+	if (typeof (options.bgnodes) == "string") {
+		bgnodes = selector(options.bgnodes);
 	} else if (window.NodeList && options.elements instanceof window.NodeList) {
 		bgnodes = options.bgnodes;
 	} else if (window.Node && options.bgnodes instanceof window.Node) {
 		bgnodes = [options.bgnodes];
 	}
-
 	preempted = true;
-
 	for (i = 0, l = imageNodes.length; i < l; i++) images.push(imageNodes[i]);
-
 	var holdercss = document.getElementById("holderjs-style");
 	if (!holdercss) {
 		holdercss = document.createElement("style");
@@ -338,53 +334,44 @@ app.run = function (o) {
 		holdercss.type = "text/css";
 		document.getElementsByTagName("head")[0].appendChild(holdercss);
 	}
-	
 	if (!options.nocss) {
-	    if (holdercss.styleSheet) {
-		    holdercss.styleSheet.cssText += options.stylesheet;
-	    } else {
-		    holdercss.appendChild(document.createTextNode(options.stylesheet));
-	    }
+		if (holdercss.styleSheet) {
+			holdercss.styleSheet.cssText += options.stylesheet;
+		} else {
+			holdercss.appendChild(document.createTextNode(options.stylesheet));
+		}
 	}
-
 	var cssregex = new RegExp(options.domain + "\/(.*?)\"?\\)");
-
 	for (var l = bgnodes.length, i = 0; i < l; i++) {
 		var src = window.getComputedStyle(bgnodes[i], null)
 			.getPropertyValue("background-image");
 		var flags = src.match(cssregex);
 		var bgsrc = bgnodes[i].getAttribute("data-background-src");
-
 		if (flags) {
 			var holder = parse_flags(flags[1].split("/"), options);
 			if (holder) {
 				render("background", bgnodes[i], holder, src);
 			}
-		}
-		else if(bgsrc != null){
-		    var holder = parse_flags(bgsrc.substr(bgsrc.lastIndexOf(options.domain) + options.domain.length + 1)
+		} else if (bgsrc != null) {
+			var holder = parse_flags(bgsrc.substr(bgsrc.lastIndexOf(options.domain) + options.domain.length + 1)
 				.split("/"), options);
-		    if(holder){
-			render("background", bgnodes[i], holder, src);
-		    }
+			if (holder) {
+				render("background", bgnodes[i], holder, src);
+			}
 		}
 	}
-
 	for (l = images.length, i = 0; i < l; i++) {
-	    
-		var attr_src = attr_data_src = src = null;
-		
-		try{
-		    attr_src = images[i].getAttribute("src");
-		    attr_datasrc = images[i].getAttribute("data-src");
-		}catch(e){}
-				
+		var attr_data_src, attr_src;
+		attr_src = attr_data_src = src = null;
+		try {
+			attr_src = images[i].getAttribute("src");
+			attr_datasrc = images[i].getAttribute("data-src");
+		} catch (e) {}
 		if (attr_datasrc == null && !! attr_src && attr_src.indexOf(options.domain) >= 0) {
 			src = attr_src;
 		} else if ( !! attr_datasrc && attr_datasrc.indexOf(options.domain) >= 0) {
 			src = attr_datasrc;
 		}
-		
 		if (src) {
 			var holder = parse_flags(src.substr(src.lastIndexOf(options.domain) + options.domain.length + 1)
 				.split("/"), options);
@@ -399,7 +386,6 @@ app.run = function (o) {
 	}
 	return app;
 };
-
 contentLoaded(win, function () {
 	if (window.addEventListener) {
 		window.addEventListener("resize", fluid_update, false);
@@ -409,9 +395,8 @@ contentLoaded(win, function () {
 	}
 	preempted || app.run();
 });
-
 if (typeof define === "function" && define.amd) {
-	define("Holder", [], function () {
+	define([], function () {
 		return app;
 	});
 }