/*
 * 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 ) ;

            // 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 += FCKTools.GetStyleHtml( FCK_ShowTableBordersCSS, true ) ;

            sHeadExtra += FCKTools.GetStyleHtml( FCK_InternalCSS, 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() ;
    },

    // 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 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>' ;
        }

        var iWidth    = FCKConfig.ScreenWidth * 0.8 ;
        var iHeight    = FCKConfig.ScreenHeight * 0.7 ;
        var iLeft    = ( FCKConfig.ScreenWidth - iWidth ) / 2 ;

        var sOpenUrl = '' ;
        if ( FCK_IS_CUSTOM_DOMAIN && FCKBrowserInfo.IsIE)
        {
            window._FCKHtmlToLoad = sHTML ;
            sOpenUrl = 'javascript:void( (function(){' +
                'document.open() ;' +
                'document.domain="' + document.domain + '" ;' +
                'document.write( window.opener._FCKHtmlToLoad );' +
                'document.close() ;' +
                'window.opener._FCKHtmlToLoad = null ;' +
                '})() )' ;
        }

        var oWindow = window.open( sOpenUrl, null, 'toolbar=yes,location=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width=' + iWidth + ',height=' + iHeight + ',left=' + iLeft ) ;

        if ( !FCK_IS_CUSTOM_DOMAIN || !FCKBrowserInfo.IsIE)
        {
            oWindow.document.write( sHTML );
            oWindow.document.close();
        }

    },

    SwitchEditMode : function( noUndo )
    {
        var bIsWysiwyg = ( FCK.EditMode == FCK_EDITMODE_WYSIWYG ) ;

        // Save the current IsDirty state, so we may restore it after the switch.
        var bIsDirty = FCK.IsDirty() ;

        var sHtml ;

        // Update the HTML in the view output to show, also update
        // FCKTempBin for IE to avoid #2263.
        if ( bIsWysiwyg )
        {
            FCKCommands.GetCommand( 'ShowBlocks' ).SaveState() ;
            if ( !noUndo && FCKBrowserInfo.IsIE )
                FCKUndo.SaveUndoStep() ;

            sHtml = FCK.GetXHTML( FCKConfig.FormatSource ) ;

            if ( FCKBrowserInfo.IsIE )
                FCKTempBin.ToHtml() ;

            if ( sHtml == null )
                return false ;
        }
        else
            sHtml = this.EditingArea.Textarea.value ;

        FCK.EditMode = bIsWysiwyg ? FCK_EDITMODE_SOURCE : FCK_EDITMODE_WYSIWYG ;

        FCK.SetData( sHtml, !bIsDirty ) ;

        // Set the Focus.
        FCK.Focus() ;

        // Update the toolbar (Running it directly causes IE to fail).
        FCKTools.RunFunction( FCK.ToolbarSet.RefreshModeState, FCK.ToolbarSet ) ;

        return true ;
    },

    InsertElement : function( element )
    {
        // The parameter may be a string (element name), so transform it in an element.
        if ( typeof element == 'string' )
            element = this.EditorDocument.createElement( element ) ;

        var elementName = element.nodeName.toLowerCase() ;

        FCKSelection.Restore() ;

        // Create a range for the selection. V3 will have a new selection
        // object that may internally supply this feature.
        var range = new FCKDomRange( this.EditorWindow ) ;

        // Move to the selection and delete it.
        range.MoveToSelection() ;
        range.DeleteContents() ;

        if ( FCKListsLib.BlockElements[ elementName ] != null )
        {
            if ( range.StartBlock )
            {
                if ( range.CheckStartOfBlock() )
                    range.MoveToPosition( range.StartBlock, 3 ) ;
                else if ( range.CheckEndOfBlock() )
                    range.MoveToPosition( range.StartBlock, 4 ) ;
                else
                    range.SplitBlock() ;
            }

            range.InsertNode( element ) ;

            var next = FCKDomTools.GetNextSourceElement( element, false, null, [ 'hr','br','param','img','area','input' ], true ) ;

            // Be sure that we have something after the new element, so we can move the cursor there.
            if ( !next && FCKConfig.EnterMode != 'br')
            {
                next = this.EditorDocument.body.appendChild( this.EditorDocument.createElement( FCKConfig.EnterMode ) ) ;

                if ( FCKBrowserInfo.IsGeckoLike )
                    FCKTools.AppendBogusBr( next ) ;
            }

            if ( FCKListsLib.EmptyElements[ elementName ] == null )
                range.MoveToElementEditStart( element ) ;
            else if ( next )
                range.MoveToElementEditStart( next ) ;
            else
                range.MoveToPosition( element, 4 ) ;

            if ( FCKBrowserInfo.IsGeckoLike )
            {
                if ( next )
                    FCKDomTools.ScrollIntoView( next, false );
                FCKDomTools.ScrollIntoView( element, false );
            }
        }
        else
        {
            // Insert the node.
            range.InsertNode( element ) ;

            // Move the selection right after the new element.
            // DISCUSSION: Should we select the element instead?
            range.SetStart( element, 4 ) ;
            range.SetEnd( element, 4 ) ;
        }

        range.Select() ;
        range.Release() ;

        // REMOVE IT: The focus should not really be set here. It is up to the
        // calling code to reset the focus if needed.
        this.Focus() ;

        return element ;
    },

    _InsertBlockElement : function( blockElement )
    {
    },

    _IsFunctionKey : function( keyCode )
    {
        // keys that are captured but do not change editor contents
        if ( keyCode >= 16 && keyCode <= 20 )
            // shift, ctrl, alt, pause, capslock
            return true ;
        if ( keyCode == 27 || ( keyCode >= 33 && keyCode <= 40 ) )
            // esc, page up, page down, end, home, left, up, right, down
            return true ;
        if ( keyCode == 45 )
            // insert, no effect on FCKeditor, yet
            return true ;
        return false ;
    },

    _KeyDownListener : function( evt )
    {
        if (! evt)
            evt = FCK.EditorWindow.event ;
        if ( FCK.EditorWindow )
        {
            if ( !FCK._IsFunctionKey(evt.keyCode) // do not capture function key presses, like arrow keys or shift/alt/ctrl
                    && !(evt.ctrlKey || evt.metaKey) // do not capture Ctrl hotkeys, as they have their snapshot capture logic
                    && !(evt.keyCode == 46) ) // do not capture Del, it has its own capture logic in fckenterkey.js
                FCK._KeyDownUndo() ;
        }
        return true ;
    },

    _KeyDownUndo : function()
    {
        if ( !FCKUndo.Typing )
        {
            FCKUndo.SaveUndoStep() ;
            FCKUndo.Typing = true ;
            FCK.Events.FireEvent( "OnSelectionChange" ) ;
        }

        FCKUndo.TypesCount++ ;
        FCKUndo.Changed = 1 ;

        if ( FCKUndo.TypesCount > FCKUndo.MaxTypes )
        {
            FCKUndo.TypesCount = 0 ;
            FCKUndo.SaveUndoStep() ;
        }
    },

    _TabKeyHandler : function( evt )
    {
        if ( ! evt )
            evt = window.event ;

        var keystrokeValue = evt.keyCode ;

        // Pressing <Tab> in source mode should produce a tab space in the text area, not
        // changing the focus to something else.
        if ( keystrokeValue == 9 && FCK.EditMode != FCK_EDITMODE_WYSIWYG )
        {
            if ( FCKBrowserInfo.IsIE )
            {
                var range = document.selection.createRange() ;
                if ( range.parentElement() != FCK.EditingArea.Textarea )
                    return true ;
                range.text = '\t' ;
                range.select() ;
            }
            else
            {
                var a = [] ;
                var el = FCK.EditingArea.Textarea ;
                var selStart = el.selectionStart ;
                var selEnd = el.selectionEnd ;
                a.push( el.value.substr(0, selStart ) ) ;
                a.push( '\t' ) ;
                a.push( el.value.substr( selEnd ) ) ;
                el.value = a.join( '' ) ;
                el.setSelectionRange( selStart + 1, selStart + 1 ) ;
            }

            if ( evt.preventDefault )
                return evt.preventDefault() ;

            return evt.returnValue = false ;
        }

        return true ;
    }
} ;

FCK.Events = new FCKEvents( FCK ) ;

// DEPRECATED in favor or "GetData".
FCK.GetHTML    = FCK.GetXHTML = FCK.GetData ;

// DEPRECATED in favor of "SetData".
FCK.SetHTML = FCK.SetData ;

// InsertElementAndGetIt and CreateElement are Deprecated : returns the same value as InsertElement.
FCK.InsertElementAndGetIt = FCK.CreateElement = FCK.InsertElement ;

// Replace all events attributes (like onclick).
function _FCK_ProtectEvents_ReplaceTags( tagMatch )
{
    return tagMatch.replace( FCKRegexLib.EventAttributes, _FCK_ProtectEvents_ReplaceEvents ) ;
}

// Replace an event attribute with its respective __fckprotectedatt attribute.
// The original event markup will be encoded and saved as the value of the new
// attribute.
function _FCK_ProtectEvents_ReplaceEvents( eventMatch, attName )
{
    return ' ' + attName + '_fckprotectedatt="' + encodeURIComponent( eventMatch ) + '"' ;
}

function _FCK_ProtectEvents_RestoreEvents( match, encodedOriginal )
{
    return decodeURIComponent( encodedOriginal ) ;
}

function _FCK_MouseEventsListener( evt )
{
    if ( ! evt )
        evt = window.event ;
    if ( evt.type == 'mousedown' )
        FCK.MouseDownFlag = true ;
    else if ( evt.type == 'mouseup' )
        FCK.MouseDownFlag = false ;
    else if ( evt.type == 'mousemove' )
        FCK.Events.FireEvent( 'OnMouseMove', evt ) ;
}

function _FCK_PaddingNodeListener()
{
    if ( FCKConfig.EnterMode.IEquals( 'br' ) )
        return ;
    FCKDomTools.EnforcePaddingNode( FCK.EditorDocument, FCKConfig.EnterMode ) ;

    if ( ! FCKBrowserInfo.IsIE && FCKDomTools.PaddingNode )
    {
        // Prevent the caret from going between the body and the padding node in Firefox.
        // i.e. <body>|<p></p></body>
        var sel = FCKSelection.GetSelection() ;
        if ( sel && sel.rangeCount == 1 )
        {
            var range = sel.getRangeAt( 0 ) ;
            if ( range.collapsed && range.startContainer == FCK.EditorDocument.body && range.startOffset == 0 )
            {
                range.selectNodeContents( FCKDomTools.PaddingNode ) ;
                range.collapse( true ) ;
                sel.removeAllRanges() ;
                sel.addRange( range ) ;
            }
        }
    }
    else if ( FCKDomTools.PaddingNode )
    {
        // Prevent the caret from going into an empty body but not into the padding node in IE.
        // i.e. <body><p></p>|</body>
        var parentElement = FCKSelection.GetParentElement() ;
        var paddingNode = FCKDomTools.PaddingNode ;
        if ( parentElement && parentElement.nodeName.IEquals( 'body' ) )
        {
            if ( FCK.EditorDocument.body.childNodes.length == 1
                    && FCK.EditorDocument.body.firstChild == paddingNode )
            {
                /*
                 * Bug #1764: Don't move the selection if the
                 * current selection isn't in the editor
                 * document.
                 */
                if ( FCKSelection._GetSelectionDocument( FCK.EditorDocument.selection ) != FCK.EditorDocument )
                    return ;

                var range = FCK.EditorDocument.body.createTextRange() ;
                var clearContents = false ;
                if ( !paddingNode.childNodes.firstChild )
                {
                    paddingNode.appendChild( FCKTools.GetElementDocument( paddingNode ).createTextNode( '\ufeff' ) ) ;
                    clearContents = true ;
                }
                range.moveToElementText( paddingNode ) ;
                range.select() ;
                if ( clearContents )
                    range.pasteHTML( '' ) ;
            }
        }
    }
}

function _FCK_EditingArea_OnLoad()
{
    // Get the editor's window and document (DOM)
    FCK.EditorWindow    = FCK.EditingArea.Window ;
    FCK.EditorDocument    = FCK.EditingArea.Document ;

    if ( FCKBrowserInfo.IsIE )
        FCKTempBin.ToElements() ;

    FCK.InitializeBehaviors() ;

    // Listen for mousedown and mouseup events for tracking drag and drops.
    FCK.MouseDownFlag = false ;
    FCKTools.AddEventListener( FCK.EditorDocument, 'mousemove', _FCK_MouseEventsListener ) ;
    FCKTools.AddEventListener( FCK.EditorDocument, 'mousedown', _FCK_MouseEventsListener ) ;
    FCKTools.AddEventListener( FCK.EditorDocument, 'mouseup', _FCK_MouseEventsListener ) ;

    // Most of the CTRL key combos do not work under Safari for onkeydown and onkeypress (See #1119)
    // But we can use the keyup event to override some of these...
    if ( FCKBrowserInfo.IsSafari )
    {
        var undoFunc = function( evt )
        {
            if ( ! ( evt.ctrlKey || evt.metaKey ) )
                return ;
            if ( FCK.EditMode != FCK_EDITMODE_WYSIWYG )
                return ;
            switch ( evt.keyCode )
            {
                case 89:
                    FCKUndo.Redo() ;
                    break ;
                case 90:
                    FCKUndo.Undo() ;
                    break ;
            }
        }

        FCKTools.AddEventListener( FCK.EditorDocument, 'keyup', undoFunc ) ;
    }

    // Create the enter key handler
    FCK.EnterKeyHandler = new FCKEnterKey( FCK.EditorWindow, FCKConfig.EnterMode, FCKConfig.ShiftEnterMode, FCKConfig.TabSpaces ) ;

    // Listen for keystroke events.
    FCK.KeystrokeHandler.AttachToElement( FCK.EditorDocument ) ;

    if ( FCK._ForceResetIsDirty )
        FCK.ResetIsDirty() ;

    // This is a tricky thing for IE. In some cases, even if the cursor is
    // blinking in the editing, the keystroke handler doesn't catch keyboard
    // events. We must activate the editing area to make it work. (#142).
    if ( FCKBrowserInfo.IsIE && FCK.HasFocus )
        FCK.EditorDocument.body.setActive() ;

    FCK.OnAfterSetHTML() ;

    // Restore show blocks status.
    FCKCommands.GetCommand( 'ShowBlocks' ).RestoreState() ;

    // Check if it is not a startup call, otherwise complete the startup.
    if ( FCK.Status != FCK_STATUS_NOTLOADED )
        return ;

    FCK.SetStatus( FCK_STATUS_ACTIVE ) ;
}

function _FCK_GetEditorAreaStyleTags()
{
    return FCKTools.GetStyleHtml( FCKConfig.EditorAreaCSS ) +
        FCKTools.GetStyleHtml( FCKConfig.EditorAreaStyles ) ;
}

function _FCK_KeystrokeHandler_OnKeystroke( keystroke, keystrokeValue )
{
    if ( FCK.Status != FCK_STATUS_COMPLETE )
        return false ;

    if ( FCK.EditMode == FCK_EDITMODE_WYSIWYG )
    {
        switch ( keystrokeValue )
        {
            case 'Paste' :
                return !FCK.Paste() ;

            case 'Cut' :
                FCKUndo.SaveUndoStep() ;
                return false ;
        }
    }
    else
    {
        // In source mode, some actions must have their default behavior.
        if ( keystrokeValue.Equals( 'Paste', 'Undo', 'Redo', 'SelectAll', 'Cut' ) )
            return false ;
    }

    // The return value indicates if the default behavior of the keystroke must
    // be cancelled. Let's do that only if the Execute() call explicitly returns "false".
    var oCommand = FCK.Commands.GetCommand( keystrokeValue ) ;

    // If the command is disabled then ignore the keystroke
    if ( oCommand.GetState() == FCK_TRISTATE_DISABLED )
        return false ;

    return ( oCommand.Execute.apply( oCommand, FCKTools.ArgumentsToArray( arguments, 2 ) ) !== false ) ;
}

// Set the FCK.LinkedField reference to the field that will be used to post the
// editor data.
(function()
{
    // There is a bug on IE... getElementById returns any META tag that has the
    // name set to the ID you are looking for. So the best way in to get the array
    // by names and look for the correct one.
    // As ASP.Net generates a ID that is different from the Name, we must also
    // look for the field based on the ID (the first one is the ID).

    var oDocument = window.parent.document ;

    // Try to get the field using the ID.
    var eLinkedField = oDocument.getElementById( FCK.Name ) ;

    var i = 0;
    while ( eLinkedField || i == 0 )
    {
        if ( eLinkedField && eLinkedField.tagName.toLowerCase().Equals( 'input', 'textarea' ) )
        {
            FCK.LinkedField = eLinkedField ;
            break ;
        }

        eLinkedField = oDocument.getElementsByName( FCK.Name )[i++] ;
    }
})() ;

var FCKTempBin =
{
    Elements : new Array(),

    AddElement : function( element )
    {
        var iIndex = this.Elements.length ;
        this.Elements[ iIndex ] = element ;
        return iIndex ;
    },

    RemoveElement : function( index )
    {
        var e = this.Elements[ index ] ;
        this.Elements[ index ] = null ;
        return e ;
    },

    Reset : function()
    {
        var i = 0 ;
        while ( i < this.Elements.length )
            this.Elements[ i++ ] = null ;
        this.Elements.length = 0 ;
    },

    ToHtml : function()
    {
        for ( var i = 0 ; i < this.Elements.length ; i++ )
        {
            this.Elements[i] = '<div>&nbsp;' + this.Elements[i].outerHTML + '</div>' ;
            this.Elements[i].isHtml = true ;
        }
    },

    ToElements : function()
    {
        var node = FCK.EditorDocument.createElement( 'div' ) ;
        for ( var i = 0 ; i < this.Elements.length ; i++ )
        {
            if ( this.Elements[i].isHtml )
            {
                node.innerHTML = this.Elements[i] ;
                this.Elements[i] = node.firstChild.removeChild( node.firstChild.lastChild ) ;
            }
        }
    }
} ;



// # Focus Manager: Manages the focus in the editor.
var FCKFocusManager = FCK.FocusManager =
{
    IsLocked : false,

    AddWindow : function( win, sendToEditingArea )
    {
        var oTarget ;

        if ( FCKBrowserInfo.IsIE )
            oTarget = win.nodeType == 1 ? win : win.frameElement ? win.frameElement : win.document ;
        else if ( FCKBrowserInfo.IsSafari )
            oTarget = win ;
        else
            oTarget = win.document ;

        FCKTools.AddEventListener( oTarget, 'blur', FCKFocusManager_Win_OnBlur ) ;
        FCKTools.AddEventListener( oTarget, 'focus', sendToEditingArea ? FCKFocusManager_Win_OnFocus_Area : FCKFocusManager_Win_OnFocus ) ;
    },

    RemoveWindow : function( win )
    {
        if ( FCKBrowserInfo.IsIE )
            oTarget = win.nodeType == 1 ? win : win.frameElement ? win.frameElement : win.document ;
        else
            oTarget = win.document ;

        FCKTools.RemoveEventListener( oTarget, 'blur', FCKFocusManager_Win_OnBlur ) ;
        FCKTools.RemoveEventListener( oTarget, 'focus', FCKFocusManager_Win_OnFocus_Area ) ;
        FCKTools.RemoveEventListener( oTarget, 'focus', FCKFocusManager_Win_OnFocus ) ;
    },

    Lock : function()
    {
        this.IsLocked = true ;
    },

    Unlock : function()
    {
        if ( this._HasPendingBlur )
            FCKFocusManager._Timer = window.setTimeout( FCKFocusManager_FireOnBlur, 100 ) ;

        this.IsLocked = false ;
    },

    _ResetTimer : function()
    {
        this._HasPendingBlur = false ;

        if ( this._Timer )
        {
            window.clearTimeout( this._Timer ) ;
            delete this._Timer ;
        }
    }
} ;

function FCKFocusManager_Win_OnBlur()
{
    if ( typeof(FCK) != 'undefined' && FCK.HasFocus )
    {
        FCKFocusManager._ResetTimer() ;
        FCKFocusManager._Timer = window.setTimeout( FCKFocusManager_FireOnBlur, 100 ) ;
    }
}

function FCKFocusManager_FireOnBlur()
{
    if ( FCKFocusManager.IsLocked )
        FCKFocusManager._HasPendingBlur = true ;
    else
    {
        FCK.HasFocus = false ;
        FCK.Events.FireEvent( "OnBlur" ) ;
    }
}

function FCKFocusManager_Win_OnFocus_Area()
{
    // Check if we are already focusing the editor (to avoid loops).
    if ( FCKFocusManager._IsFocusing )
        return ;

    FCKFocusManager._IsFocusing = true ;

    FCK.Focus() ;
    FCKFocusManager_Win_OnFocus() ;

    // The above FCK.Focus() call may trigger other focus related functions.
    // So, to avoid a loop, we delay the focusing mark removal, so it get
    // executed after all othre functions have been run.
    FCKTools.RunFunction( function()
        {
            delete FCKFocusManager._IsFocusing ;
        } ) ;
}

function FCKFocusManager_Win_OnFocus()
{
    FCKFocusManager._ResetTimer() ;

    if ( !FCK.HasFocus && !FCKFocusManager.IsLocked )
    {
        FCK.HasFocus = true ;
        FCK.Events.FireEvent( "OnFocus" ) ;
    }
}

/*
 * #1633 : Protect the editor iframe from external styles.
 * Notice that we can't use FCKTools.ResetStyles here since FCKTools isn't
 * loaded yet.
 */
(function()
{
    var el = window.frameElement ;
    var width = el.width ;
    var height = el.height ;
    if ( /^\d+$/.test( width ) ) width += 'px' ;
    if ( /^\d+$/.test( height ) ) height += 'px' ;
    var style = el.style ;
    style.border = style.padding = style.margin = 0 ;
    style.backgroundColor = 'transparent';
    style.backgroundImage = 'none';
    style.width = width ;
    style.height = height ;
})() ;
