/*
* FCKeditor - The text editor for internet
* Copyright (C) 2003-2004 Frederico Caldeira Knabben
*
* Licensed under the terms of the GNU Lesser General Public License:
* http://www.opensource.org/licenses/lgpl-license.php
*
* For further information visit:
* http://www.fckeditor.net/
*
* File Name: fckscriptloader.js
* Defines the FCKScriptLoader object that is used to dynamically load
* scripts in the editor.
*
* Version: 2.0 RC2
* Modified: 2004-05-31 23:07:50
*
* File Authors:
* Frederico Caldeira Knabben ([email protected])
*/
// This object is used to download scripts and css files sequentialy.
// A file download is not started until the previous file was not completelly
// downloaded.
var FCKScriptLoader = new Object() ;
FCKScriptLoader.IsLoading = false ;
FCKScriptLoader.Queue = new Array() ;
// Adds a script or css to the queue.
FCKScriptLoader.AddScript = function( scriptPath )
{
FCKScriptLoader.Queue[ FCKScriptLoader.Queue.length ] = scriptPath ;
if ( !this.IsLoading )
this.CheckQueue() ;
}
// Checks the queue to see if there is something to load.
// This function should not be called by code. It's a internal function
// that's called recursively.
FCKScriptLoader.CheckQueue = function()
{
// Check if the queue is not empty.
if ( this.Queue.length > 0 )
{
this.IsLoading = true ;
// Get the first item in the queue
var sScriptPath = this.Queue[0] ;
// Removes the first item from the queue
var oTempArray = new Array() ;
for ( i = 1 ; i < this.Queue.length ; i++ )
oTempArray[ i - 1 ] = this.Queue[ i ] ;
this.Queue = oTempArray ;
// window.status = ( 'Loading ' + sScriptPath + '...' ) ;
// Dynamically load the file (it can be a CSS or a JS)
var e ;
// If is a CSS
if ( sScriptPath.lastIndexOf( '.css' ) > 0 )
{
e = document.createElement( 'LINK' ) ;
e.rel = 'stylesheet' ;
e.type = 'text/css' ;
}
// It is a JS
else
{
e = document.createElement( "script" ) ;
e.type = "text/javascript" ;
}
// Add the new object to the HEAD.
document.getElementsByTagName("head")[0].appendChild( e ) ;
var oEvent = function()
{
// Gecko doesn't have a "readyState" property
if ( this.tagName == 'LINK' || !this.readyState || this.readyState == 'loaded' )
// Load the next script available in the queue
FCKScriptLoader.CheckQueue() ;
}
// Start downloading it.
if ( e.tagName == 'LINK' )
{
// IE must wait for the file to be downloaded.
if ( FCKBrowserInfo.IsIE )
e.onload = oEvent ;
// Gecko doens't fire any event when the CSS is loaded, so we
// can't wait for it.
else
FCKScriptLoader.CheckQueue() ;
e.href = sScriptPath ;
}
else
{
// Gecko fires the "onload" event and IE fires "onreadystatechange"
e.onload = e.onreadystatechange = oEvent ;
e.src = sScriptPath ;
}
}
else
{
this.IsLoading = false ;
// Call the "OnEmpty" event.
if ( this.OnEmpty )
this.OnEmpty() ;
}
}