source: trunk/phpgwapi/js/ckeditor/_source/core/loader.js @ 2862

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

/**
 * @fileOverview Defines the {@link CKEDITOR.loader} objects, which is used to
 *              load core scripts and their dependencies from _source.
 */

if ( typeof CKEDITOR == 'undefined' )
        CKEDITOR = {};

if ( !CKEDITOR.loader )
{
        /**
         * Load core scripts and their dependencies from _source.
         * @namespace
         * @example
         */
        CKEDITOR.loader = (function()
        {
                // Table of script names and their dependencies.
                var scripts =
                {
                        'core/_bootstrap'               : [ 'core/config', 'core/ckeditor', 'core/plugins', 'core/scriptloader', 'core/tools', /* The following are entries that we want to force loading at the end to avoid dependence recursion */ 'core/dom/comment', 'core/dom/elementpath', 'core/dom/text', 'core/dom/range' ],
                        'core/ajax'                             : [ 'core/xml' ],
                        'core/ckeditor'                 : [ 'core/ckeditor_basic', 'core/dom', 'core/dtd', 'core/dom/document', 'core/dom/element', 'core/editor', 'core/event', 'core/htmlparser', 'core/htmlparser/element', 'core/htmlparser/fragment', 'core/htmlparser/filter', 'core/htmlparser/basicwriter', 'core/tools' ],
                        'core/ckeditor_base'    : [],
                        'core/ckeditor_basic'   : [ 'core/editor_basic', 'core/env', 'core/event' ],
                        'core/command'                  : [],
                        'core/config'                   : [ 'core/ckeditor_base' ],
                        'core/dom'                              : [],
                        'core/dom/comment'              : [ 'core/dom/node' ],
                        'core/dom/document'             : [ 'core/dom', 'core/dom/domobject', 'core/dom/window' ],
                        'core/dom/documentfragment'     : [ 'core/dom/element' ],
                        'core/dom/element'              : [ 'core/dom', 'core/dom/document', 'core/dom/domobject', 'core/dom/node', 'core/dom/nodelist', 'core/tools' ],
                        'core/dom/elementpath'  : [ 'core/dom/element' ],
                        'core/dom/event'                : [],
                        'core/dom/node'                 : [ 'core/dom/domobject', 'core/tools' ],
                        'core/dom/nodelist'             : [ 'core/dom/node' ],
                        'core/dom/domobject'    : [ 'core/dom/event' ],
                        'core/dom/range'                : [ 'core/dom/document', 'core/dom/documentfragment', 'core/dom/element', 'core/dom/walker' ],
                        'core/dom/text'                 : [ 'core/dom/node', 'core/dom/domobject' ],
                        'core/dom/walker'               : [ 'core/dom/node' ],
                        'core/dom/window'               : [ 'core/dom/domobject' ],
                        'core/dtd'                              : [ 'core/tools' ],
                        'core/editor'                   : [ 'core/command', 'core/config', 'core/editor_basic', 'core/focusmanager', 'core/lang', 'core/plugins', 'core/skins', 'core/themes', 'core/tools', 'core/ui' ],
                        'core/editor_basic'             : [ 'core/event' ],
                        'core/env'                              : [],
                        'core/event'                    : [],
                        'core/focusmanager'             : [],
                        'core/htmlparser'               : [],
                        'core/htmlparser/comment'       : [ 'core/htmlparser' ],
                        'core/htmlparser/element'       : [ 'core/htmlparser', 'core/htmlparser/fragment' ],
                        'core/htmlparser/fragment'      : [ 'core/htmlparser', 'core/htmlparser/comment', 'core/htmlparser/text', 'core/htmlparser/cdata' ],
                        'core/htmlparser/text'          : [ 'core/htmlparser' ],
                        'core/htmlparser/cdata'         : [ 'core/htmlparser' ],
                        'core/htmlparser/filter'        : [ 'core/htmlparser' ],
                        'core/htmlparser/basicwriter': [ 'core/htmlparser' ],
                        'core/imagecacher'              : [ 'core/dom/element' ],
                        'core/lang'                             : [],
                        'core/plugins'                  : [ 'core/resourcemanager' ],
                        'core/resourcemanager'  : [ 'core/scriptloader', 'core/tools' ],
                        'core/scriptloader'             : [ 'core/dom/element', 'core/env' ],
                        'core/skins'                    : [ 'core/imagecacher', 'core/scriptloader' ],
                        'core/themes'                   : [ 'core/resourcemanager' ],
                        'core/tools'                    : [ 'core/env' ],
                        'core/ui'                               : [],
                        'core/xml'                              : [ 'core/env' ]
                };

                var basePath = (function()
                {
                        // This is a copy of CKEDITOR.basePath, but requires the script having
                        // "_source/core/loader.js".
                        if ( CKEDITOR && CKEDITOR.basePath )
                                return CKEDITOR.basePath;

                        // Find out the editor directory path, based on its <script> tag.
                        var path = '';
                        var scripts = document.getElementsByTagName( 'script' );

                        for ( var i = 0 ; i < scripts.length ; i++ )
                        {
                                var match = scripts[i].src.match( /(^|.*[\\\/])core\/loader.js(?:\?.*)?$/i );

                                if ( match )
                                {
                                        path = match[1];
                                        break;
                                }
                        }

                        // In IE (only) the script.src string is the raw valued entered in the
                        // HTML. Other browsers return the full resolved URL instead.
                        if ( path.indexOf('://') == -1 )
                        {
                                // Absolute path.
                                if ( path.indexOf( '/' ) === 0 )
                                        path = location.href.match( /^.*?:\/\/[^\/]*/ )[0] + path;
                                // Relative path.
                                else
                                        path = location.href.match( /^[^\?]*\// )[0] + path;
                        }

                        return path;
                })();

                var timestamp = 'A39E';

                var getUrl = function( resource )
                {
                        if ( CKEDITOR && CKEDITOR.getUrl )
                                return CKEDITOR.getUrl( resource );

                        return basePath + resource +
                                ( resource.indexOf( '?' ) >= 0 ? '&' : '?' ) +
                                't=' + timestamp;
                };

                var pendingLoad = [];

                /** @lends CKEDITOR.loader */
                return {
                        /**
                         * The list of loaded scripts in their loading order.
                         * @type Array
                         * @example
                         * // Alert the loaded script names.
                         * alert( <b>CKEDITOR.loader.loadedScripts</b> );
                         */
                        loadedScripts : [],

                        loadPending : function()
                        {
                                var scriptName = pendingLoad.shift();

                                if ( !scriptName )
                                        return;

                                var scriptSrc = getUrl( '_source/' + scriptName + '.js' );

                                var script = document.createElement( 'script' );
                                script.type = 'text/javascript';
                                script.src = scriptSrc;

                                function onScriptLoaded()
                                {
                                        // Append this script to the list of loaded scripts.
                                        CKEDITOR.loader.loadedScripts.push( scriptName );

                                        // Load the next.
                                        CKEDITOR.loader.loadPending();
                                }

                                // We must guarantee the execution order of the scripts, so we
                                // need to load them one by one. (#4145)
                                // The following if/else block has been taken from the scriptloader core code.
                                if ( typeof(script.onreadystatechange) !== "undefined" )
                                {
                                        /** @ignore */
                                        script.onreadystatechange = function()
                                        {
                                                if ( script.readyState == 'loaded' || script.readyState == 'complete' )
                                                {
                                                        script.onreadystatechange = null;
                                                        onScriptLoaded();
                                                }
                                        };
                                }
                                else
                                {
                                        /** @ignore */
                                        script.onload = function()
                                        {
                                                // Some browsers, such as Safari, may call the onLoad function
                                                // immediately. Which will break the loading sequence. (#3661)
                                                setTimeout( function() { onScriptLoaded( scriptName ); }, 0 );
                                        };
                                }

                                document.body.appendChild( script );
                        },

                        /**
                         * Loads a specific script, including its dependencies. This is not a
                         * synchronous loading, which means that the code to be loaded will
                         * not necessarily be available after this call.
                         * @example
                         * CKEDITOR.loader.load( 'core/dom/element' );
                         */
                        load : function( scriptName, defer )
                        {
                                // Check if the script has already been loaded.
                                if ( scriptName in this.loadedScripts )
                                        if ( ! ( scriptName in Object.prototype ) )
                                                return;

                                // Get the script dependencies list.
                                var dependencies = scripts[ scriptName ];
                                if ( !dependencies )
                                        throw 'The script name"' + scriptName + '" is not defined.';

                                // Mark the script as loaded, even before really loading it, to
                                // avoid cross references recursion.
                                this.loadedScripts[ scriptName ] = true;

                                // Load all dependencies first.
                                for ( var i = 0 ; i < dependencies.length ; i++ )
                                        this.load( dependencies[ i ], true );

                                var scriptSrc = getUrl( '_source/' + scriptName + '.js' );

                                // Append the <script> element to the DOM.
                                // If the page is fully loaded, we can't use document.write
                                // but if the script is run while the body is loading then it's safe to use it
                                // Unfortunately, Firefox <3.6 doesn't support document.readyState, so it won't get this improvement
                                if ( document.body && (!document.readyState || document.readyState == 'complete') )
                                {
                                        pendingLoad.push( scriptName );

                                        if ( !defer )
                                                this.loadPending();
                                }
                                else
                                {
                                        // Append this script to the list of loaded scripts.
                                        this.loadedScripts.push( scriptName );

                                        document.write( '<script src="' + scriptSrc + '" type="text/javascript"><\/script>' );
                                }
                        }
                };
        })();
}

// Check if any script has been defined for autoload.
if ( CKEDITOR._autoLoad )
{
        CKEDITOR.loader.load( CKEDITOR._autoLoad );
        delete CKEDITOR._autoLoad;
}