source: branches/2.2/filemanager/tp/ckeditor/_source/core/resourcemanager.js @ 3019

/*
Copyright (c) 2003-2009, 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 and themes.
 */

 /**
 * Base class for resource managers, like plugins and themes. This class is not
 * intended to be used out of the CKEditor core code.
 * @param {String} basePath The path for the resources folder.
 * @param {String} fileName The name used for resource files.
 * @namespace
 * @example
 */
CKEDITOR.resourceManager = function( basePath, fileName )
{
        /**
         * The base directory containing all resources.
         * @name CKEDITOR.resourceManager.prototype.basePath
         * @type String
         * @example
         */
        this.basePath = basePath;

        /**
         * The name used for resource files.
         * @name CKEDITOR.resourceManager.prototype.fileName
         * @type String
         * @example
         */
        this.fileName = fileName;

        /**
         * Contains references to all resources that have already been registered
         * with {@link #add}.
         * @name CKEDITOR.resourceManager.prototype.registered
         * @type Object
         * @example
         */
        this.registered = {};

        /**
         * Contains references to all resources that have already been loaded
         * with {@link #load}.
         * @name CKEDITOR.resourceManager.prototype.loaded
         * @type Object
         * @example
         */
        this.loaded = {};

        /**
         * Contains references to all resources that have already been registered
         * with {@link #addExternal}.
         * @name CKEDITOR.resourceManager.prototype.externals
         * @type Object
         * @example
         */
        this.externals = {};

        /**
         * @private
         */
        this._ =
        {
                // List of callbacks waiting for plugins to be loaded.
                waitingList : {}
        };
};

CKEDITOR.resourceManager.prototype =
{
        /**
         * Registers a resource.
         * @param {String} name The resource name.
         * @param {Object} [definition] The resource definition.
         * @example
         * CKEDITOR.plugins.add( 'sample', { ... plugin definition ... } );
         * @see CKEDITOR.pluginDefinition
         */
        add : function( name, definition )
        {
                if ( this.registered[ name ] )
                        throw '[CKEDITOR.resourceManager.add] The resource name "' + name + '" is already registered.';

                this.registered[ name ] = definition || {};
        },

        /**
         * Gets the definition of a specific resource.
         * @param {String} name The resource name.
         * @type Object
         * @example
         * var definition = <b>CKEDITOR.plugins.get( 'sample' )</b>;
         */
        get : function( name )
        {
                return this.registered[ name ] || null;
        },

        /**
         * Get the folder path for a specific loaded resource.
         * @param {String} name The resource name.
         * @type String
         * @example
         * alert( <b>CKEDITOR.plugins.getPath( 'sample' )</b> );  // "&lt;editor path&gt;/plugins/sample/"
         */
        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.
         * @param {String} name The resource name.
         * @type String
         * @example
         * alert( <b>CKEDITOR.plugins.getFilePath( 'sample' )</b> );  // "&lt;editor path&gt;/plugins/sample/plugin.js"
         */
        getFilePath : function( name )
        {
                var external = this.externals[ name ];
                return CKEDITOR.getUrl(
                                this.getPath( name ) +
                                ( ( external && external.file ) || ( this.fileName + '.js' ) ) );
        },

        /**
         * Registers one or more resources to be loaded from an external path
         * instead of the core base path.
         * @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.
         * @example
         * // Loads a plugin from '/myplugin/samples/plugin.js'.
         * CKEDITOR.plugins.addExternal( 'sample', '/myplugins/sample/' );
         * @example
         * // Loads a plugin from '/myplugin/samples/my_plugin.js'.
         * CKEDITOR.plugins.addExternal( 'sample', '/myplugins/sample/', 'my_plugin.js' );
         */
        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.
         * @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.
         * @example
         * <b>CKEDITOR.plugins.load</b>( 'myplugin', function( plugins )
         *     {
         *         alert( plugins['myplugin'] );  // "object"
         *     });
         */
        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);
        }
};