source: trunk/admin/inc/ckeditor/_source/core/imagecacher.js@ 239

/*
Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

(function()
{
        var loaded = {};

        var loadImage = function( image, callback )
        {
                var doCallback = function()
                        {
                                img.removeAllListeners();
                                loaded[ image ] = 1;
                                callback();
                        };

                var img = new CKEDITOR.dom.element( 'img' );
                img.on( 'load', doCallback );
                img.on( 'error', doCallback );
                img.setAttribute( 'src', image );
        };

        /**
         * Load images into the browser cache.
         * @namespace
         * @example
         */
        CKEDITOR.imageCacher =
        {
                /**
                 * Loads one or more images.
                 * @param {Array} images The URLs for the images to be loaded.
                 * @param {Function} callback The function to be called once all images
                 *              are loaded.
                 */
                load : function( images, callback )
                {
                        var pendingCount = images.length;

                        var checkPending = function()
                        {
                                if ( --pendingCount === 0 )
                                        callback();
                        };

                        for ( var i = 0 ; i < images.length ; i++ )
                        {
                                var image = images[ i ];

                                if ( loaded[ image ] )
                                        checkPending();
                                else
                                        loadImage( image, checkPending );
                        }
                }
        };
})();