/*
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2006 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/
 * 
 * "Support Open Source software. What about a donation today?"
 * 
 * File Name: fckeditor.js
 * 	This is the integration file for JavaScript.
 * 
 * 	It defines the FCKeditor class that can be used to create editor
 * 	instances in a HTML page in the client side. For server side
 * 	operations, use the specific integration system.
 * 
 * File Authors:
 * 		Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

// FCKeditor Class
var FCKeditor = function( instanceName, width, height, toolbarSet, value )
{
	// Properties
	this.InstanceName	= instanceName ;
	this.Width			= width			|| '100%' ;
	this.Height			= height		|| '200' ;
	this.ToolbarSet		= toolbarSet	|| 'Default' ;
	this.Value			= value			|| '' ;
	this.BasePath		= '/fckeditor/' ;
	this.CheckBrowser	= true ;
	this.DisplayErrors	= true ;
	this.EnableSafari	= false ;		// This is a temporary property, while Safari support is under development.
	this.EnableOpera	= false ;		// This is a temporary property, while Opera support is under development.

	this.Config			= new Object() ;

	// Events
	this.OnError		= null ;	// function( source, errorNumber, errorDescription )
}

FCKeditor.prototype.Version			= '2.3.1' ;
FCKeditor.prototype.VersionBuild	= '1062' ;

FCKeditor.prototype.Create = function()
{
	// Check for errors
	if ( !this.InstanceName || this.InstanceName.length == 0 )
	{
		this._ThrowError( 701, 'You must specify an instance name.' ) ;
		return ;
	}

	document.write( '<div>' ) ;

	if ( !this.CheckBrowser || this._IsCompatibleBrowser() )
	{
		document.write( '<input type="hidden" id="' + this.InstanceName + '" name="' + this.InstanceName + '" value="' + this._HTMLEncode( this.Value ) + '" style="display:none" />' ) ;
		document.write( this._GetConfigHtml() ) ;
		document.write( this._GetIFrameHtml() ) ;
	}
	else
	{
		var sWidth  = this.Width.toString().indexOf('%')  > 0 ? this.Width  : this.Width  + 'px' ;
		var sHeight = this.Height.toString().indexOf('%') > 0 ? this.Height : this.Height + 'px' ;
		document.write('<textarea name="' + this.InstanceName + '" rows="4" cols="40" style="WIDTH: ' + sWidth + '; HEIGHT: ' + sHeight + '">' + this._HTMLEncode( this.Value ) + '<\/textarea>') ;
	}

	document.write( '</div>' ) ;
}

FCKeditor.prototype.ReplaceTextarea = function()
{
	if ( !this.CheckBrowser || this._IsCompatibleBrowser() )
	{
		// We must check the elements firstly using the Id and then the name.
		var oTextarea = document.getElementById( this.InstanceName ) ;
		var colElementsByName = document.getElementsByName( this.InstanceName ) ;
		var i = 0;
		while ( oTextarea || i == 0 )
		{
			if ( oTextarea && oTextarea.tagName == 'TEXTAREA' )
				break ;
			oTextarea = colElementsByName[i++] ;
		}
		
		if ( !oTextarea )
		{
			alert( 'Error: The TEXTAREA with id or name set to "' + this.InstanceName + '" was not found' ) ;
			return ;
		}

		oTextarea.style.display = 'none' ;
		this._InsertHtmlBefore( this._GetConfigHtml(), oTextarea ) ;
		this._InsertHtmlBefore( this._GetIFrameHtml(), oTextarea ) ;
	}
}

FCKeditor.prototype._InsertHtmlBefore = function( html, element )
{
	if ( element.insertAdjacentHTML )	// IE
		element.insertAdjacentHTML( 'beforeBegin', html ) ;
	else								// Gecko
	{
		var oRange = document.createRange() ;
		oRange.setStartBefore( element ) ;
		var oFragment = oRange.createContextualFragment( html );
		element.parentNode.insertBefore( oFragment, element ) ;
	}
}

FCKeditor.prototype._GetConfigHtml = function()
{
	var sConfig = '' ;
	for ( var o in this.Config )
	{
		if ( sConfig.length > 0 ) sConfig += '&amp;' ;
		sConfig += escape(o) + '=' + escape( this.Config[o] ) ;
	}

	return '<input type="hidden" id="' + this.InstanceName + '___Config" value="' + sConfig + '" style="display:none" />' ;
}

FCKeditor.prototype._GetIFrameHtml = function()
{
	var sFile = (/fcksource=true/i).test( window.top.location.search ) ? 'fckeditor.original.html' : 'fckeditor.html' ;

	var sLink = this.BasePath + 'editor/' + sFile + '?InstanceName=' + this.InstanceName ;
	if (this.ToolbarSet) sLink += '&Toolbar=' + this.ToolbarSet ;

	return '' ;
}

FCKeditor.prototype._IsCompatibleBrowser = function()
{
	var sAgent = navigator.userAgent.toLowerCase() ;
	
	// Internet Explorer
	if ( sAgent.indexOf("msie") != -1 && sAgent.indexOf("mac") == -1 && sAgent.indexOf("opera") == -1 )
	{
		var sBrowserVersion = navigator.appVersion.match(/MSIE (.\..)/)[1] ;
		return ( sBrowserVersion >= 5.5 ) ;
	}

	// Gecko (Opera 9 tries to behave like Gecko at this point).
	if ( navigator.product == "Gecko" && navigator.productSub >= 20030210 && !( typeof(opera) == 'object' && opera.postError ) )
		return true ;

	// Opera
	if ( this.EnableOpera && navigator.appName == 'Opera' && parseInt( navigator.appVersion ) >= 9 )
			return true ;

	// Safari
	if ( this.EnableSafari && sAgent.indexOf( 'safari' ) != -1 )
		return ( sAgent.match( /safari\/(\d+)/ )[1] >= 312 ) ;	// Build must be at least 312 (1.3)
	
	return false ;
}

FCKeditor.prototype._ThrowError = function( errorNumber, errorDescription )
{
	this.ErrorNumber		= errorNumber ;
	this.ErrorDescription	= errorDescription ;

	if ( this.DisplayErrors )
	{
		document.write( '<div style="COLOR: #ff0000">' ) ;
		document.write( '[ FCKeditor Error ' + this.ErrorNumber + ': ' + this.ErrorDescription + ' ]' ) ;
		document.write( '</div>' ) ;
	}

	if ( typeof( this.OnError ) == 'function' )
		this.OnError( this, errorNumber, errorDescription ) ;
}

FCKeditor.prototype._HTMLEncode = function( text )
{
	if ( typeof( text ) != "string" )
		text = text.toString() ;

	text = text.replace(/&/g, "&amp;") ;
	text = text.replace(/"/g, "&quot;") ;
	text = text.replace(/</g, "&lt;") ;
	text = text.replace(/>/g, "&gt;") ;
	text = text.replace(/'/g, "&#39;") ;

	return text ;
}
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