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+/**
+ * @license Copyright (c) 2003-2013, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.html or http://ckeditor.com/license
+ */
+
+/**
+ * @fileOverview Defines the {@link CKEDITOR.resourceManager} class, which is
+ *		the base for resource managers, like plugins.
+ */
+
+/**
+ * Base class for resource managers, like plugins. This class is not
+ * intended to be used out of the CKEditor core code.
+ *
+ * @class
+ * @constructor Creates a resourceManager class instance.
+ * @param {String} basePath The path for the resources folder.
+ * @param {String} fileName The name used for resource files.
+ */
+CKEDITOR.resourceManager = function( basePath, fileName ) {
+	/**
+	 * The base directory containing all resources.
+	 *
+	 * @property {String}
+	 */
+	this.basePath = basePath;
+
+	/**
+	 * The name used for resource files.
+	 *
+	 * @property {String}
+	 */
+	this.fileName = fileName;
+
+	/**
+	 * Contains references to all resources that have already been registered
+	 * with {@link #add}.
+	 */
+	this.registered = {};
+
+	/**
+	 * Contains references to all resources that have already been loaded
+	 * with {@link #load}.
+	 */
+	this.loaded = {};
+
+	/**
+	 * Contains references to all resources that have already been registered
+	 * with {@link #addExternal}.
+	 */
+	this.externals = {};
+
+	/**
+	 * @private
+	 */
+	this._ = {
+		// List of callbacks waiting for plugins to be loaded.
+		waitingList: {}
+	};
+};
+
+CKEDITOR.resourceManager.prototype = {
+	/**
+	 * Registers a resource.
+	 *
+	 *		CKEDITOR.plugins.add( 'sample', { ... plugin definition ... } );
+	 *
+	 * @param {String} name The resource name.
+	 * @param {Object} [definition] The resource definition.
+	 * @see CKEDITOR.pluginDefinition
+	 */
+	add: function( name, definition ) {
+		if ( this.registered[ name ] )
+			throw '[CKEDITOR.resourceManager.add] The resource name "' + name + '" is already registered.';
+
+		var resource = this.registered[ name ] = definition || {};
+		resource.name = name;
+		resource.path = this.getPath( name );
+
+		CKEDITOR.fire( name + CKEDITOR.tools.capitalize( this.fileName ) + 'Ready', resource );
+
+		return this.get( name );
+	},
+
+	/**
+	 * Gets the definition of a specific resource.
+	 *
+	 *		var definition = CKEDITOR.plugins.get( 'sample' );
+	 *
+	 * @param {String} name The resource name.
+	 * @returns {Object} The registered object.
+	 */
+	get: function( name ) {
+		return this.registered[ name ] || null;
+	},
+
+	/**
+	 * Get the folder path for a specific loaded resource.
+	 *
+	 *		alert( CKEDITOR.plugins.getPath( 'sample' ) ); // '<editor path>/plugins/sample/'
+	 *
+	 * @param {String} name The resource name.
+	 * @returns {String}
+	 */
+	getPath: function( name ) {
+		var external = this.externals[ name ];
+		return CKEDITOR.getUrl( ( external && external.dir ) || this.basePath + name + '/' );
+	},
+
+	/**
+	 * Get the file path for a specific loaded resource.
+	 *
+	 *		alert( CKEDITOR.plugins.getFilePath( 'sample' ) ); // '<editor path>/plugins/sample/plugin.js'
+	 *
+	 * @param {String} name The resource name.
+	 * @returns {String}
+	 */
+	getFilePath: function( name ) {
+		var external = this.externals[ name ];
+		return CKEDITOR.getUrl( this.getPath( name ) + ( ( external && ( typeof external.file == 'string' ) ) ? external.file : this.fileName + '.js' ) );
+	},
+
+	/**
+	 * Registers one or more resources to be loaded from an external path
+	 * instead of the core base path.
+	 *
+	 *		// Loads a plugin from '/myplugin/samples/plugin.js'.
+	 *		CKEDITOR.plugins.addExternal( 'sample', '/myplugins/sample/' );
+	 *
+	 *		// Loads a plugin from '/myplugin/samples/my_plugin.js'.
+	 *		CKEDITOR.plugins.addExternal( 'sample', '/myplugins/sample/', 'my_plugin.js' );
+	 *
+	 *		// Loads a plugin from '/myplugin/samples/my_plugin.js'.
+	 *		CKEDITOR.plugins.addExternal( 'sample', '/myplugins/sample/my_plugin.js', '' );
+	 *
+	 * @param {String} names The resource names, separated by commas.
+	 * @param {String} path The path of the folder containing the resource.
+	 * @param {String} [fileName] The resource file name. If not provided, the
+	 * default name is used. If provided with a empty string, will implicitly indicates that `path` argument
+	 * is already the full path.
+	 */
+	addExternal: function( names, path, fileName ) {
+		names = names.split( ',' );
+		for ( var i = 0; i < names.length; i++ ) {
+			var name = names[ i ];
+
+			this.externals[ name ] = {
+				dir: path,
+				file: fileName
+			};
+		}
+	},
+
+	/**
+	 * Loads one or more resources.
+	 *
+	 *		CKEDITOR.plugins.load( 'myplugin', function( plugins ) {
+	 *			alert( plugins[ 'myplugin' ] ); // object
+	 *		} );
+	 *
+	 * @param {String/Array} name The name of the resource to load. It may be a
+	 * string with a single resource name, or an array with several names.
+	 * @param {Function} callback A function to be called when all resources
+	 * are loaded. The callback will receive an array containing all loaded names.
+	 * @param {Object} [scope] The scope object to be used for the callback call.
+	 */
+	load: function( names, callback, scope ) {
+		// Ensure that we have an array of names.
+		if ( !CKEDITOR.tools.isArray( names ) )
+			names = names ? [ names ] : [];
+
+		var loaded = this.loaded,
+			registered = this.registered,
+			urls = [],
+			urlsNames = {},
+			resources = {};
+
+		// Loop through all names.
+		for ( var i = 0; i < names.length; i++ ) {
+			var name = names[ i ];
+
+			if ( !name )
+				continue;
+
+			// If not available yet.
+			if ( !loaded[ name ] && !registered[ name ] ) {
+				var url = this.getFilePath( name );
+				urls.push( url );
+				if ( !( url in urlsNames ) )
+					urlsNames[ url ] = [];
+				urlsNames[ url ].push( name );
+			} else
+				resources[ name ] = this.get( name );
+		}
+
+		CKEDITOR.scriptLoader.load( urls, function( completed, failed ) {
+			if ( failed.length ) {
+				throw '[CKEDITOR.resourceManager.load] Resource name "' + urlsNames[ failed[ 0 ] ].join( ',' )
+					+ '" was not found at "' + failed[ 0 ] + '".';
+			}
+
+			for ( var i = 0; i < completed.length; i++ ) {
+				var nameList = urlsNames[ completed[ i ] ];
+				for ( var j = 0; j < nameList.length; j++ ) {
+					var name = nameList[ j ];
+					resources[ name ] = this.get( name );
+
+					loaded[ name ] = 1;
+				}
+			}
+
+			callback.call( scope, resources );
+		}, this );
+	}
+};