scripts.js

/*

Holder - 2.3 - client side image placeholders
(c) 2012-2014 Ivan Malopinsky / http://imsky.co

Provided under the MIT License.
Commercial use requires attribution.

*/
var Holder = Holder || {};
(function (app, win) {

var system_config = {
	use_svg: false,
	use_canvas: false,
	use_fallback: false
};
var instance_config = {};
var preempted = false;
canvas = document.createElement('canvas');
var dpr = 1, bsr = 1;
var resizable_images = [];

if (!canvas.getContext) {
	system_config.use_fallback = true;
} else {
	if (canvas.toDataURL("image/png")
		.indexOf("data:image/png") < 0) {
		//Android doesn't support data URI
		system_config.use_fallback = true;
	} else {
		var ctx = canvas.getContext("2d");
	}
}

if(!!document.createElementNS && !!document.createElementNS('http://www.w3.org/2000/svg', 'svg').createSVGRect){
	system_config.use_svg = true;
	system_config.use_canvas = false;
}

if(!system_config.use_fallback){
    dpr = window.devicePixelRatio || 1,
    bsr = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1;
}

var ratio = dpr / bsr;

var settings = {
	domain: "holder.js",
	images: "img",
	bgnodes: ".holderjs",
	themes: {
		"gray": {
			background: "#eee",
			foreground: "#aaa",
			size: 12
		},
		"social": {
			background: "#3a5a97",
			foreground: "#fff",
			size: 12
		},
		"industrial": {
			background: "#434A52",
			foreground: "#C2F200",
			size: 12
		},
		"sky": {
			background: "#0D8FDB",
			foreground: "#fff",
			size: 12
		},
		"vine": {
			background: "#39DBAC",
			foreground: "#1E292C",
			size: 12
		},
		"lava": {
			background: "#F8591A",
			foreground: "#1C2846",
			size: 12
		}
	},
	stylesheet: ""
};
app.flags = {
	dimensions: {
		regex: /^(\d+)x(\d+)$/,
		output: function (val) {
			var exec = this.regex.exec(val);
			return {
				width: +exec[1],
				height: +exec[2]
			}
		}
	},
	fluid: {
		regex: /^([0-9%]+)x([0-9%]+)$/,
		output: function (val) {
			var exec = this.regex.exec(val);
			return {
				width: exec[1],
				height: exec[2]
			}
		}
	},
	colors: {
		regex: /#([0-9a-f]{3,})\:#([0-9a-f]{3,})/i,
		output: function (val) {
			var exec = this.regex.exec(val);
			return {
				size: settings.themes.gray.size,
				foreground: "#" + exec[2],
				background: "#" + exec[1]
			}
		}
	},
	text: {
		regex: /text\:(.*)/,
		output: function (val) {
			return this.regex.exec(val)[1];
		}
	},
	font: {
		regex: /font\:(.*)/,
		output: function (val) {
			return this.regex.exec(val)[1];
		}
	},
	auto: {
		regex: /^auto$/
	},
	textmode: {
		regex: /textmode\:(.*)/,
		output: function(val){
			return this.regex.exec(val)[1];
		}
	}
}

function text_size(width, height, template) {
	height = parseInt(height, 10);
	width = parseInt(width, 10);
	var bigSide = Math.max(height, width)
	var smallSide = Math.min(height, width)
	var scale = 1 / 12;
	var newHeight = Math.min(smallSide * 0.75, 0.75 * bigSide * scale);
	return {
		height: Math.round(Math.max(template.size, newHeight))
	}
}

var svg_el = (function(){
	var serializer = new XMLSerializer();
	var svg_ns = "http://www.w3.org/2000/svg"
	var svg = document.createElementNS(svg_ns, "svg");
	svg.setAttribute("xmlns", "http://www.w3.org/2000/svg")
	svg.setAttribute("xmlns:xlink", "http://www.w3.org/1999/xlink");
	var bg_el = document.createElementNS(svg_ns, "rect")
	var text_el = document.createElementNS(svg_ns, "text")
	var textnode_el = document.createTextNode(null)
	text_el.setAttribute("text-anchor", "middle")
	text_el.appendChild(textnode_el)
	svg.appendChild(bg_el)
	svg.appendChild(text_el)
		
	return function(props){
		svg.setAttribute("width",props.width);
		svg.setAttribute("height", props.height);
		bg_el.setAttribute("width", props.width);
		bg_el.setAttribute("height", props.height);
		bg_el.setAttribute("fill", props.template.background);
		text_el.setAttribute("x", props.width/2)
		text_el.setAttribute("y", props.height/2)
		textnode_el.nodeValue=props.text
		text_el.setAttribute("style", css_properties({
		"fill": props.template.foreground,
		"font-weight": "bold",
		"font-size": props.text_height+"px",
		"font-family":props.font,
		"dominant-baseline":"central"
		}))
		return serializer.serializeToString(svg)
	}
})()

function css_properties(props){
	var ret = [];
	for(p in props){
		if(props.hasOwnProperty(p)){
			ret.push(p+":"+props[p])
		}
	}
	return ret.join(";")
}

function draw_canvas(args) {
	var ctx = args.ctx,
		dimensions = args.dimensions,
		template = args.template,
		ratio = args.ratio,
		holder = args.holder,
		literal = holder.textmode == "literal",
		exact = holder.textmode == "exact";

	var ts = text_size(dimensions.width, dimensions.height, template);
	var text_height = ts.height;
	var width = dimensions.width * ratio,
		height = dimensions.height * ratio;
	var font = template.font ? template.font : "Arial,Helvetica,sans-serif";
	canvas.width = width;
	canvas.height = height;
	ctx.textAlign = "center";
	ctx.textBaseline = "middle";
	ctx.fillStyle = template.background;
	ctx.fillRect(0, 0, width, height);
	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) {
		var dimensions = holder.dimensions;
		text = dimensions.width + "x" + dimensions.height;
	}
	else if(exact && holder.exact_dimensions){
		var dimensions = holder.exact_dimensions;
		text = (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height));
	}
	var text_width = ctx.measureText(text).width;
	if (text_width / width >= 0.75) {
		text_height = Math.floor(text_height * 0.75 * (width / text_width));
	}
	//Resetting font size if necessary
	ctx.font = "bold " + (text_height * ratio) + "px " + font;
	ctx.fillText(text, (width / 2), (height / 2), width);
	return canvas.toDataURL("image/png");
}

function draw_svg(args){
	var dimensions = args.dimensions,
		template = args.template,
		holder = args.holder,
		literal = holder.textmode == "literal",
		exact = holder.textmode == "exact";

	var ts = text_size(dimensions.width, dimensions.height, template);
	var text_height = ts.height;
	var width = dimensions.width,
		height = dimensions.height;
		
	var font = template.font ? template.font : "Arial,Helvetica,sans-serif";
	var text = template.text ? template.text : (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height));
	
	if (literal) {
		var dimensions = holder.dimensions;
		text = dimensions.width + "x" + dimensions.height;
	}
	else if(exact && holder.exact_dimensions){
		var dimensions = holder.exact_dimensions;
		text = (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height));
	}
	var string = svg_el({
		text: text, 
		width:width, 
		height:height, 
		text_height:text_height, 
		font:font, 
		template:template
	})
	return "data:image/svg+xml;base64,"+btoa(string);
}

function draw(args) {
	if(instance_config.use_canvas && !instance_config.use_svg){
		return draw_canvas(args);
	}
	else{
		return draw_svg(args);
	}
}

function render(mode, el, holder, src) {
	var dimensions = holder.dimensions,
		theme = holder.theme,
		text = holder.text ? decodeURIComponent(holder.text) : holder.text;
	var dimensions_caption = dimensions.width + "x" + dimensions.height;
	theme = (text ? extend(theme, {
		text: text
	}) : theme);
	theme = (holder.font ? extend(theme, {
		font: holder.font
	}) : theme);
	el.setAttribute("data-src", src);
	holder.theme = theme;
	el.holder_data = holder;
	
	if (mode == "image") {
		el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption);
		if (instance_config.use_fallback || !holder.auto) {
			el.style.width = dimensions.width + "px";
			el.style.height = dimensions.height + "px";
		}
		if (instance_config.use_fallback) {
			el.style.backgroundColor = theme.background;
		} else {
			el.setAttribute("src", draw({ctx: ctx, dimensions: dimensions, template: theme, ratio:ratio, holder: holder}));
			
			if(holder.textmode && holder.textmode == "exact"){
				resizable_images.push(el);
				resizable_update(el);
			}
			
		}
	} else if (mode == "background") {
		if (!instance_config.use_fallback) {
			el.style.backgroundImage = "url(" + draw({ctx:ctx, dimensions: dimensions, template: theme, ratio: ratio, holder: holder}) + ")";
			el.style.backgroundSize = dimensions.width + "px " + dimensions.height + "px";
		}
	} else if (mode == "fluid") {
		el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption);
		if (dimensions.height.slice(-1) == "%") {
			el.style.height = dimensions.height
		} else if(holder.auto == null || !holder.auto){
			el.style.height = dimensions.height + "px"
		}
		if (dimensions.width.slice(-1) == "%") {
			el.style.width = dimensions.width
		} else if(holder.auto == null || !holder.auto){
			el.style.width = dimensions.width + "px"
		}
		if (el.style.display == "inline" || el.style.display === "" || el.style.display == "none") {
			el.style.display = "block";
		}
		
		set_initial_dimensions(el)
		
		if (instance_config.use_fallback) {
			el.style.backgroundColor = theme.background;
		} else {
			resizable_images.push(el);
			resizable_update(el);
		}
	}
}

function dimension_check(el, callback) {
	var dimensions = {
		height: el.clientHeight,
		width: el.clientWidth
	};
	if (!dimensions.height && !dimensions.width) {
		el.setAttribute("data-holder-invisible", true)
		callback.call(this, el)
	}
	else{
		el.removeAttribute("data-holder-invisible")
		return dimensions;
	}
}

function set_initial_dimensions(el){
	if(el.holder_data){
		var dimensions = dimension_check(el, app.invisible_error_fn( set_initial_dimensions))
		if(dimensions){
			var holder = el.holder_data;
			holder.initial_dimensions = dimensions;
			holder.fluid_data = {
				fluid_height: holder.dimensions.height.slice(-1) == "%",
				fluid_width: holder.dimensions.width.slice(-1) == "%",
				mode: null
			}
			if(holder.fluid_data.fluid_width && !holder.fluid_data.fluid_height){
				holder.fluid_data.mode = "width"
				holder.fluid_data.ratio = holder.initial_dimensions.width / parseFloat(holder.dimensions.height)
			}
			else if(!holder.fluid_data.fluid_width && holder.fluid_data.fluid_height){
				holder.fluid_data.mode = "height";
				holder.fluid_data.ratio = parseFloat(holder.dimensions.width) / holder.initial_dimensions.height
			}
		}
	}
}

function resizable_update(element) {
	var images;
	if (element.nodeType == null) {
		images = resizable_images;
	} else {
		images = [element]
	}
	for (var i in images) {
		if (!images.hasOwnProperty(i)) {
			continue;
		}
		var el = images[i]
		if (el.holder_data) {
			var holder = el.holder_data;
			var dimensions = dimension_check(el, app.invisible_error_fn( resizable_update))
			if(dimensions){
				if(holder.fluid){
					if(holder.auto){
						switch(holder.fluid_data.mode){
							case "width":
								dimensions.height = dimensions.width / holder.fluid_data.ratio;
							break;
							case "height":
								dimensions.width = dimensions.height * holder.fluid_data.ratio;
							break;
						}
					}
					el.setAttribute("src", draw({
						ctx: ctx,
						dimensions: dimensions,
						template: holder.theme,
						ratio: ratio,
						holder: holder
					}))
				}
				if(holder.textmode && holder.textmode == "exact"){
					holder.exact_dimensions = dimensions;
					el.setAttribute("src", draw({
						ctx: ctx,
						dimensions: holder.dimensions,
						template: holder.theme,
						ratio: ratio,
						holder: holder
					}))
				}
			}
		}
	}
}

function parse_flags(flags, options) {
	var ret = {
		theme: extend(settings.themes.gray, {})
	};
	var render = false;
	for (var fl = flags.length, j = 0; j < fl; j++) {
		var flag = flags[j];
		if (app.flags.dimensions.match(flag)) {
			render = true;
			ret.dimensions = app.flags.dimensions.output(flag);
		} else if (app.flags.fluid.match(flag)) {
			render = true;
			ret.dimensions = app.flags.fluid.output(flag);
			ret.fluid = true;
		} else if (app.flags.textmode.match(flag)) {
			ret.textmode = app.flags.textmode.output(flag)
		} 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
			if(options.themes.hasOwnProperty(flag)){
				ret.theme = extend(options.themes[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;
}

for (var flag in app.flags) {
	if (!app.flags.hasOwnProperty(flag)) continue;
	app.flags[flag].match = function (val) {
		return val.match(this.regex)
	}
}

app.invisible_error_fn = function(fn){
	return function(el){
		if(el.hasAttribute("data-holder-invisible")){
			throw new Error("Holder: invisible placeholder")
		}
	}
}

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) {
		for (var i = 0, l = node.length; i < l; i++) {
			var img = document.createElement("img")
			img.setAttribute("data-src", src);
			node[i].appendChild(img);
		}
	}
	return app;
};

app.run = function (o) {
	instance_config = extend({}, system_config)
	preempted = true;

	var options = extend(settings, o),
		images = [],
		imageNodes = [],
		bgnodes = [];
		
	if(options.use_canvas != null && options.use_canvas){
		instance_config.use_canvas = true;
		instance_config.use_svg = false;
	}
		
	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];
	} else if(window.HTMLCollection && options.images instanceof window.HTMLCollection){
		imageNodes = options.images
	}

	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];
	}
	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");
		holdercss.setAttribute("id", "holderjs-style");
		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));
		}
	}
	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)
				.split("/"), options);
			if (holder) {
				render("background", bgnodes[i], holder, src);
			}
		}
	}
	for (l = images.length, i = 0; i < l; i++) {
		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);
			if (holder) {
				if (holder.fluid) {
					render("fluid", images[i], holder, src)
				} else {
					render("image", images[i], holder, src);
				}
			}
		}
	}
	return app;
};

contentLoaded(win, function () {
	if (window.addEventListener) {
		window.addEventListener("resize", resizable_update, false);
		window.addEventListener("orientationchange", resizable_update, false);
	} else {
		window.attachEvent("onresize", resizable_update)
	}
	preempted || app.run({});
});
if (typeof define === "function" && define.amd) {
	define([], function () {
		return app;
	});
}

//github.com/davidchambers/Base64.js
(function(){function t(t){this.message=t}var e="undefined"!=typeof exports?exports:this,r="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";t.prototype=Error(),t.prototype.name="InvalidCharacterError",e.btoa||(e.btoa=function(e){for(var o,n,a=0,i=r,c="";e.charAt(0|a)||(i="=",a%1);c+=i.charAt(63&o>>8-8*(a%1))){if(n=e.charCodeAt(a+=.75),n>255)throw new t("'btoa' failed");o=o<<8|n}return c}),e.atob||(e.atob=function(e){if(e=e.replace(/=+$/,""),1==e.length%4)throw new t("'atob' failed");for(var o,n,a=0,i=0,c="";n=e.charAt(i++);~n&&(o=a%4?64*o+n:n,a++%4)?c+=String.fromCharCode(255&o>>(6&-2*a)):0)n=r.indexOf(n);return c})})();

//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){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)}}

//https://gist.github.com/991057 by Jed Schmidt with modifications
function selector(a,b){var a=a.match(/^(\W)?(.*)/),b=b||document,c=b["getElement"+(a[1]?"#"==a[1]?"ById":"sByClassName":"sByTagName")],d=c.call(b,a[2]),e=[];return null!==d&&(e=d.length||0===d.length?d:[d]),e}

//shallow object property extend
function extend(a,b){
	var c={};
	for(var i in a){
		if(a.hasOwnProperty(i)){
			c[i]=a[i];
		}
	}
	for(var i in b){
		if(b.hasOwnProperty(i)){
			c[i]=b[i];
		}
	}
	return c
}

//hasOwnProperty polyfill
if (!Object.prototype.hasOwnProperty)
    /*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 */

})(Holder, window);
// Magnific Popup v0.9.9 by Dmitry Semenov
// http://bit.ly/magnific-popup#build=inline+image+gallery+imagezoom
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/**
 * Style Switcher script by Paul Sowden
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 * Original source: http://alistapart.com/article/alternate
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}

function createCookie(name,value,days) {
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