fck.js

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/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2007 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(),

	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
			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 ) ;
	},

	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 :
					if ( !FCKListsLib.BlockElements[ oNode.nodeName.toLowerCase() ] )
						bMoveNode = true ;
					break ;

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

			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 oHandler = FCK.RegisteredDoubleClickHandlers[ element.tagName ] ;
		if ( oHandler )
			oHandler( element ) ;
	},

	// Register objects that can handle double click operations.
	RegisterDoubleClickHandler : function( handlerFunction, tag )
	{
		FCK.RegisteredDoubleClickHandlers[ tag.toUpperCase() ] = 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' ) ;

		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' : 'ABBR|XML|EMBED' ;

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

			// Protect parts of the code that must remain untouched (and invisible)
			// during editing.
			data = FCKConfig.ProtectedSource.Protect( data ) ;

			// Call the Data Processor to transform the data.
			data = FCK.DataProcessor.ConvertToHtml( data ) ;

			// Fix for invalid self-closing tags (see #152).
			data = data.replace( FCKRegexLib.InvalidSelfCloseTags, '$1></$2>' ) ;

			// Protect event attributes (they could get fired in the editing area).
			data = FCK.ProtectEvents( data ) ;

			// Protect some things from the browser itself.
			data = FCK.ProtectUrls( data ) ;
			data = FCK.ProtectTags( data ) ;

			// Insert the base tag (FCKConfig.BaseHref), if not exists in the source.
			// The base must be the first tag in the HEAD, to get relative
			// links on styles, for example.
			if ( FCK.TempBaseTag.length > 0 && !FCKRegexLib.HasBaseTag.test( data ) )
				data = data.replace( FCKRegexLib.HeadOpener, '$&' + FCK.TempBaseTag ) ;

			// Build the HTML for the additional things we need on <head>.
			var sHeadExtra = '' ;

			if ( !FCKConfig.FullPage )
				sHeadExtra += _FCK_GetEditorAreaStyleTags() ;

			if ( FCKBrowserInfo.IsIE )
				sHeadExtra += FCK._GetBehaviorsStyle() ;
			else if ( FCKConfig.ShowBorders )
				sHeadExtra += '<link href="' + FCKConfig.FullBasePath + 'css/fck_showtableborders_gecko.css" rel="stylesheet" type="text/css" _fcktemp="true" />' ;

			sHeadExtra += '<link href="' + FCKConfig.FullBasePath + 'css/fck_internal.css" rel="stylesheet" type="text/css" _fcktemp="true" />' ;

			// Attention: do not change it before testing it well (sample07)!
			// This is tricky... if the head ends with <meta ... content type>,
			// Firefox will break. But, it works if we place our extra stuff as
			// the last elements in the HEAD.
			data = data.replace( FCKRegexLib.HeadCloser, sHeadExtra + '$&' ) ;

			// Load the HTML in the editing area.
			this.EditingArea.OnLoad = _FCK_EditingArea_OnLoad ;
			this.EditingArea.Start( data ) ;
		}
		else
		{
			// Remove the references to the following elements, as the editing area
			// IFRAME will be removed.
			FCK.EditorWindow	= null ;
			FCK.EditorDocument	= null ;
			FCKDomTools.PaddingNode = null ;

			this.EditingArea.OnLoad = null ;
			this.EditingArea.Start( data ) ;

			// Enables the context menu in the textarea.
			this.EditingArea.Textarea._FCKShowContextMenu = true ;

			// Removes the enter key handler.
			FCK.EnterKeyHandler = null ;

			if ( resetIsDirty )
				this.ResetIsDirty() ;

			// Listen for keystroke events.
			FCK.KeystrokeHandler.AttachToElement( this.EditingArea.Textarea ) ;

			this.EditingArea.Textarea.focus() ;

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

		if ( FCKBrowserInfo.IsGecko )
			window.onresize() ;
	},

	// For the FocusManager
	HasFocus : false,


	// This collection is used by the browser specific implementations to tell
	// which named commands must be handled separately.
	RedirectNamedCommands : new Object(),

	ExecuteNamedCommand : function( commandName, commandParameter, noRedirect, noSaveUndo )
	{
		if ( !noSaveUndo )
			FCKUndo.SaveUndoStep() ;

		if ( !noRedirect && FCK.RedirectNamedCommands[ commandName ] != null )
			FCK.ExecuteRedirectedNamedCommand( commandName, commandParameter ) ;
		else
		{
			FCK.Focus() ;
			FCK.EditorDocument.execCommand( commandName, false, commandParameter ) ;
			FCK.Events.FireEvent( 'OnSelectionChange' ) ;
		}

		if ( !noSaveUndo )
		FCKUndo.SaveUndoStep() ;
	},

	GetNamedCommandState : function( commandName )
	{
		try
		{

			// Bug #50 : Safari never returns positive state for the Paste command, override that.
			if ( FCKBrowserInfo.IsSafari && FCK.EditorWindow && commandName.IEquals( 'Paste' ) )
				return FCK_TRISTATE_OFF ;

			if ( !FCK.EditorDocument.queryCommandEnabled( commandName ) )
				return FCK_TRISTATE_DISABLED ;
			else
			{
				return FCK.EditorDocument.queryCommandState( commandName ) ? FCK_TRISTATE_ON : FCK_TRISTATE_OFF ;
			}
		}
		catch ( e )
		{
			return FCK_TRISTATE_OFF ;
		}
	},

	GetNamedCommandValue : function( commandName )
	{
		var sValue = '' ;
		var eState = FCK.GetNamedCommandState( commandName ) ;

		if ( eState == FCK_TRISTATE_DISABLED )
			return null ;

		try
		{
			sValue = this.EditorDocument.queryCommandValue( commandName ) ;
		}
		catch(e) {}

		return sValue ? sValue : '' ;
	},

	Paste : function( _callListenersOnly )
	{
		// First call 'OnPaste' listeners.
		if ( FCK.Status != FCK_STATUS_COMPLETE || !FCK.Events.FireEvent( 'OnPaste' ) )
			return false ;

		// Then call the default implementation.
		return _callListenersOnly || FCK._ExecPaste() ;
	},

	PasteFromWord : function()
	{
		FCKDialog.OpenDialog( 'FCKDialog_Paste', FCKLang.PasteFromWord, 'dialog/fck_paste.html', 400, 330, 'Word' ) ;
	},

	Preview : function()
	{
		var iWidth	= FCKConfig.ScreenWidth * 0.8 ;
		var iHeight	= FCKConfig.ScreenHeight * 0.7 ;
		var iLeft	= ( FCKConfig.ScreenWidth - iWidth ) / 2 ;
		var oWindow = window.open( '', null, 'toolbar=yes,location=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width=' + iWidth + ',height=' + iHeight + ',left=' + iLeft ) ;

		var sHTML ;

		if ( FCKConfig.FullPage )
		{
			if ( FCK.TempBaseTag.length > 0 )
				sHTML = FCK.TempBaseTag + FCK.GetXHTML() ;
			else
				sHTML = FCK.GetXHTML() ;
		}
		else
		{
			sHTML =
				FCKConfig.DocType +
				'<html dir="' + FCKConfig.ContentLangDirection + '">' +
				'<head>' +
				FCK.TempBaseTag +
				'<title>' + FCKLang.Preview + '</title>' +
				_FCK_GetEditorAreaStyleTags() +
				'</head><body' + FCKConfig.GetBodyAttributes() + '>' +
				FCK.GetXHTML() +
				'</body></html>' ;