?/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2008 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * Creation and initialization of the "FCK" object. This is the main object
 * that represents an editor instance.
 */

// FCK represents the active editor instance.
var FCK =
{
	Name			: FCKURLParams[ 'InstanceName' ],
	Status			: FCK_STATUS_NOTLOADED,
	EditMode		: FCK_EDITMODE_WYSIWYG,
	Toolbar			: null,
	HasFocus		: false,
	DataProcessor	: new FCKDataProcessor(),

	GetInstanceObject	: (function()
	{
		var w = window ;
		return function( name )
		{
			return w[name] ;
		}
	})(),

	AttachToOnSelectionChange : function( functionPointer )
	{
		this.Events.AttachEvent( 'OnSelectionChange', functionPointer ) ;
	},

	GetLinkedFieldValue : function()
	{
		return this.LinkedField.value ;
	},

	GetParentForm : function()
	{
		return this.LinkedField.form ;
	} ,

	// # START : IsDirty implementation

	StartupValue : '',

	IsDirty : function()
	{
		if ( this.EditMode == FCK_EDITMODE_SOURCE )
			return ( this.StartupValue != this.EditingArea.Textarea.value ) ;
		else
		{
			// It can happen switching between design and source mode in Gecko
			if ( ! this.EditorDocument )
				return false ;

			return ( this.StartupValue != this.EditorDocument.body.innerHTML ) ;
		}
	},

	ResetIsDirty : function()
	{
		if ( this.EditMode == FCK_EDITMODE_SOURCE )
			this.StartupValue = this.EditingArea.Textarea.value ;
		else if ( this.EditorDocument.body )
			this.StartupValue = this.EditorDocument.body.innerHTML ;
	},

	// # END : IsDirty implementation

	StartEditor : function()
	{
		this.TempBaseTag = FCKConfig.BaseHref.length > 0 ? '<base href="' + FCKConfig.BaseHref + '" _fcktemp="true"></base>' : '' ;

		// Setup the keystroke handler.
		var oKeystrokeHandler = FCK.KeystrokeHandler = new FCKKeystrokeHandler() ;
		oKeystrokeHandler.OnKeystroke = _FCK_KeystrokeHandler_OnKeystroke ;

		// Set the config keystrokes.
		oKeystrokeHandler.SetKeystrokes( FCKConfig.Keystrokes ) ;

		// In IE7, if the editor tries to access the clipboard by code, a dialog is
		// shown to the user asking if the application is allowed to access or not.
		// Due to the IE implementation of it, the KeystrokeHandler will not work
		//well in this case, so we must leave the pasting keys to have their default behavior.
		if ( FCKBrowserInfo.IsIE7 )
		{
			if ( ( CTRL + 86 /*V*/ ) in oKeystrokeHandler.Keystrokes )
				oKeystrokeHandler.SetKeystrokes( [ CTRL + 86, true ] ) ;

			if ( ( SHIFT + 45 /*INS*/ ) in oKeystrokeHandler.Keystrokes )
				oKeystrokeHandler.SetKeystrokes( [ SHIFT + 45, true ] ) ;
		}

		// Retain default behavior for Ctrl-Backspace. (Bug #362)
		oKeystrokeHandler.SetKeystrokes( [ CTRL + 8, true ] ) ;

		this.EditingArea = new FCKEditingArea( document.getElementById( 'xEditingArea' ) ) ;
		this.EditingArea.FFSpellChecker = FCKConfig.FirefoxSpellChecker ;

		// Set the editor's startup contents.
		this.SetData( this.GetLinkedFieldValue(), true ) ;

		// Tab key handling for source mode.
		FCKTools.AddEventListener( document, "keydown", this._TabKeyHandler ) ;

		// Add selection change listeners. They must be attached only once.
		this.AttachToOnSelectionChange( _FCK_PaddingNodeListener ) ;
		if ( FCKBrowserInfo.IsGecko )
			this.AttachToOnSelectionChange( this._ExecCheckEmptyBlock ) ;

	},

	Focus : function()
	{
		FCK.EditingArea.Focus() ;
	},

	SetStatus : function( newStatus )
	{
		this.Status = newStatus ;

		if ( newStatus == FCK_STATUS_ACTIVE )
		{
			FCKFocusManager.AddWindow( window, true ) ;

			if ( FCKBrowserInfo.IsIE )
				FCKFocusManager.AddWindow( window.frameElement, true ) ;

			// Force the focus in the editor.
			if ( FCKConfig.StartupFocus )
				FCK.Focus() ;
		}

		this.Events.FireEvent( 'OnStatusChange', newStatus ) ;

	},

	// Fixes the body by moving all inline and text nodes to appropriate block
	// elements.
	FixBody : function()
	{
		var sBlockTag = FCKConfig.EnterMode ;

		// In 'br' mode, no fix must be done.
		if ( sBlockTag != 'p' && sBlockTag != 'div' )
			return ;

		var oDocument = this.EditorDocument ;

		if ( !oDocument )
			return ;

		var oBody = oDocument.body ;

		if ( !oBody )
			return ;

		FCKDomTools.TrimNode( oBody ) ;

		var oNode = oBody.firstChild ;
		var oNewBlock ;

		while ( oNode )
		{
			var bMoveNode = false ;

			switch ( oNode.nodeType )
			{
				// Element Node.
				case 1 :
					var nodeName = oNode.nodeName.toLowerCase() ;
					if ( !FCKListsLib.BlockElements[ nodeName ] &&
							nodeName != 'li' &&
							!oNode.getAttribute('_fckfakelement') &&
							oNode.getAttribute('_moz_dirty') == null )
						bMoveNode = true ;
					break ;

				// Text Node.
				case 3 :
					// Ignore space only or empty text.
					if ( oNewBlock || oNode.nodeValue.Trim().length > 0 )
						bMoveNode = true ;
					break;

				// Comment Node
				case 8 :
					if ( oNewBlock )
						bMoveNode = true ;
					break;
			}

			if ( bMoveNode )
			{
				var oParent = oNode.parentNode ;

				if ( !oNewBlock )
					oNewBlock = oParent.insertBefore( oDocument.createElement( sBlockTag ), oNode ) ;

				oNewBlock.appendChild( oParent.removeChild( oNode ) ) ;

				oNode = oNewBlock.nextSibling ;
			}
			else
			{
				if ( oNewBlock )
				{
					FCKDomTools.TrimNode( oNewBlock ) ;
					oNewBlock = null ;
				}
				oNode = oNode.nextSibling ;
			}
		}

		if ( oNewBlock )
			FCKDomTools.TrimNode( oNewBlock ) ;
	},

	GetData : function( format )
	{
		// We assume that if the user is in source editing, the editor value must
		// represent the exact contents of the source, as the user wanted it to be.
		if ( FCK.EditMode == FCK_EDITMODE_SOURCE )
				return FCK.EditingArea.Textarea.value ;

		this.FixBody() ;

		var oDoc = FCK.EditorDocument ;
		if ( !oDoc )
			return null ;

		var isFullPage = FCKConfig.FullPage ;

		// Call the Data Processor to generate the output data.
		var data = FCK.DataProcessor.ConvertToDataFormat(
			isFullPage ? oDoc.documentElement : oDoc.body,
			!isFullPage,
			FCKConfig.IgnoreEmptyParagraphValue,
			format ) ;

		// Restore protected attributes.
		data = FCK.ProtectEventsRestore( data ) ;

		if ( FCKBrowserInfo.IsIE )
			data = data.replace( FCKRegexLib.ToReplace, '$1' ) ;

		if ( isFullPage )
		{
			if ( FCK.DocTypeDeclaration && FCK.DocTypeDeclaration.length > 0 )
				data = FCK.DocTypeDeclaration + '\n' + data ;

			if ( FCK.XmlDeclaration && FCK.XmlDeclaration.length > 0 )
				data = FCK.XmlDeclaration + '\n' + data ;
		}

		return FCKConfig.ProtectedSource.Revert( data ) ;
	},

	UpdateLinkedField : function()
	{
		var value = FCK.GetXHTML( FCKConfig.FormatOutput ) ;

		if ( FCKConfig.HtmlEncodeOutput )
			value = FCKTools.HTMLEncode( value ) ;

		FCK.LinkedField.value = value ;
		FCK.Events.FireEvent( 'OnAfterLinkedFieldUpdate' ) ;
	},

	RegisteredDoubleClickHandlers : new Object(),

	OnDoubleClick : function( element )
	{
		var oCalls = FCK.RegisteredDoubleClickHandlers[ element.tagName.toUpperCase() ] ;

		if ( oCalls )
		{
			for ( var i = 0 ; i < oCalls.length ; i++ )
				oCalls[ i ]( element ) ;
		}

		// Generic handler for any element
		oCalls = FCK.RegisteredDoubleClickHandlers[ '*' ] ;

		if ( oCalls )
		{
			for ( var i = 0 ; i < oCalls.length ; i++ )
				oCalls[ i ]( element ) ;
		}

	},

	// Register objects that can handle double click operations.
	RegisterDoubleClickHandler : function( handlerFunction, tag )
	{
		var nodeName = tag || '*' ;
		nodeName = nodeName.toUpperCase() ;

		var aTargets ;

		if ( !( aTargets = FCK.RegisteredDoubleClickHandlers[ nodeName ] ) )
			FCK.RegisteredDoubleClickHandlers[ nodeName ] = [ handlerFunction ] ;
		else
		{
			// Check that the event handler isn't already registered with the same listener
			// It doesn't detect function pointers belonging to an object (at least in Gecko)
			if ( aTargets.IndexOf( handlerFunction ) == -1 )
				aTargets.push( handlerFunction ) ;
		}

	},

	OnAfterSetHTML : function()
	{
		FCKDocumentProcessor.Process( FCK.EditorDocument ) ;
		FCKUndo.SaveUndoStep() ;

		FCK.Events.FireEvent( 'OnSelectionChange' ) ;
		FCK.Events.FireEvent( 'OnAfterSetHTML' ) ;
	},

	// Saves URLs on links and images on special attributes, so they don't change when
	// moving around.
	ProtectUrls : function( html )
	{
		// <A> href
		html = html.replace( FCKRegexLib.ProtectUrlsA	, '$& _fcksavedurl=$1' ) ;

		// <IMG> src
		html = html.replace( FCKRegexLib.ProtectUrlsImg	, '$& _fcksavedurl=$1' ) ;

		// <AREA> href
		html = html.replace( FCKRegexLib.ProtectUrlsArea	, '$& _fcksavedurl=$1' ) ;

		return html ;
	},

	// Saves event attributes (like onclick) so they don't get executed while
	// editing.
	ProtectEvents : function( html )
	{
		return html.replace( FCKRegexLib.TagsWithEvent, _FCK_ProtectEvents_ReplaceTags ) ;
	},

	ProtectEventsRestore : function( html )
	{
		return html.replace( FCKRegexLib.ProtectedEvents, _FCK_ProtectEvents_RestoreEvents ) ;
	},

	ProtectTags : function( html )
	{
		var sTags = FCKConfig.ProtectedTags ;

		// IE doesn't support <abbr> and it breaks it. Let's protect it.
		if ( FCKBrowserInfo.IsIE )
			sTags += sTags.length > 0 ? '|ABBR|XML|EMBED|OBJECT' : 'ABBR|XML|EMBED|OBJECT' ;

		var oRegex ;
		if ( sTags.length > 0 )
		{
			oRegex = new RegExp( '<(' + sTags + ')(?!\w|:)', 'gi' ) ;
			html = html.replace( oRegex, '<FCK:$1' ) ;

			oRegex = new RegExp( '<\/(' + sTags + ')>', 'gi' ) ;
			html = html.replace( oRegex, '<\/FCK:$1>' ) ;
		}

		// Protect some empty elements. We must do it separately because the
		// original tag may not contain the closing slash, like <hr>:
		//		- <meta> tags get executed, so if you have a redirect meta, the
		//		  content will move to the target page.
		//		- <hr> may destroy the document structure if not well
		//		  positioned. The trick is protect it here and restore them in
		//		  the FCKDocumentProcessor.
		sTags = 'META' ;
		if ( FCKBrowserInfo.IsIE )
			sTags += '|HR' ;

		oRegex = new RegExp( '<((' + sTags + ')(?=\\s|>|/)[\\s\\S]*?)/?>', 'gi' ) ;
		html = html.replace( oRegex, '<FCK:$1 />' ) ;

		return html ;
	},

	SetData : function( data, resetIsDirty )
	{
		this.EditingArea.Mode = FCK.EditMode ;

		// If there was an onSelectionChange listener in IE we must remove it to avoid crashes #1498
		if ( FCKBrowserInfo.IsIE && FCK.EditorDocument )
		{
			FCK.EditorDocument.detachEvent("onselectionchange", Doc_OnSelectionChange ) ;
		}

		FCKTempBin.Reset();

		if ( FCK.EditMode == FCK_EDITMODE_WYSIWYG )
		{
			// Save the resetIsDirty for later use (async)
			this._ForceResetIsDirty = ( resetIsDirty === true ) ;