QiFeng.ZWY.MagWeb/Content/admin/bower_components/holderjs/src/holder.js

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/*
Holder.js - client side image placeholders
© 2012-2014 Ivan Malopinsky - http://imsky.co
*/
(function(register, global, undefined) {

	//Constants and definitions

	var SVG_NS = 'http://www.w3.org/2000/svg';
	var document = global.document;

	var Holder = {
		/**
		 * Adds a theme to default settings
		 *
		 * @param {string} name Theme name
		 * @param {Object} theme Theme object, with foreground, background, size, font, and fontweight properties.
		 */
		addTheme: function(name, theme) {
			name != null && theme != null && (App.settings.themes[name] = theme);
			delete App.vars.cache.themeKeys;
			return this;
		},

		/**
		 * Appends a placeholder to an element
		 *
		 * @param {string} src Placeholder URL string
		 * @param {string} el Selector of target element(s)
		 */
		addImage: function(src, el) {
			var node = document.querySelectorAll(el);
			if (node.length) {
				for (var i = 0, l = node.length; i < l; i++) {
					var img = newEl('img');
					setAttr(img, {
						'data-src': src
					});
					node[i].appendChild(img);
				}
			}
			return this;
		},

		/**
		 * Runs Holder with options. By default runs Holder on all images with "holder.js" in their source attributes.
		 *
		 * @param {Object} userOptions Options object, can contain domain, themes, images, and bgnodes properties
		 */
		run: function(userOptions) {
			userOptions = userOptions || {};
			var renderSettings = {};

			App.vars.preempted = true;

			var options = extend(App.settings, userOptions);

			renderSettings.renderer = options.renderer ? options.renderer : App.setup.renderer;
			if (App.setup.renderers.join(',').indexOf(renderSettings.renderer) === -1) {
				renderSettings.renderer = App.setup.supportsSVG ? 'svg' : (App.setup.supportsCanvas ? 'canvas' : 'html');