source: trunk/admin/inc/FCKeditor/editor/_source/internals/fckselection_gecko.js@ 2

/*
 * 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: fckselection_gecko.js
 *      Active selection functions. (Gecko specific implementation)
 * 
 * File Authors:
 *              Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

// Get the selection type (like document.select.type in IE).
FCKSelection.GetType = function()
{
//      if ( ! this._Type )
//      {
                // By default set the type to "Text".
                this._Type = 'Text' ;

                // Check if the actual selection is a Control (IMG, TABLE, HR, etc...).
                var oSel ;
                try { oSel = FCK.EditorWindow.getSelection() ; }
                catch (e) {}
                
                if ( oSel && oSel.rangeCount == 1 )
                {
                        var oRange = oSel.getRangeAt(0) ;
                        if ( oRange.startContainer == oRange.endContainer && (oRange.endOffset - oRange.startOffset) == 1 && oRange.startContainer.nodeType != Node.TEXT_NODE )
                                this._Type = 'Control' ;
                }
//      }
        return this._Type ;
}

// Retrieves the selected element (if any), just in the case that a single
// element (object like and image or a table) is selected.
FCKSelection.GetSelectedElement = function()
{
        if ( this.GetType() == 'Control' )
        {
                var oSel = FCK.EditorWindow.getSelection() ;
                return oSel.anchorNode.childNodes[ oSel.anchorOffset ] ;
        }
}

FCKSelection.GetParentElement = function()
{
        if ( this.GetType() == 'Control' )
                return FCKSelection.GetSelectedElement().parentNode ;
        else
        {
                var oSel = FCK.EditorWindow.getSelection() ;
                if ( oSel )
                {
                        var oNode = oSel.anchorNode ;

                        while ( oNode && oNode.nodeType != 1 )
                                oNode = oNode.parentNode ;

                        return oNode ;
                }
        }
}

FCKSelection.SelectNode = function( element )
{
//      FCK.Focus() ;

        var oRange = FCK.EditorDocument.createRange() ;
        oRange.selectNode( element ) ;

        var oSel = FCK.EditorWindow.getSelection() ;
        oSel.removeAllRanges() ;
        oSel.addRange( oRange ) ;
}

FCKSelection.Collapse = function( toStart )
{
        var oSel = FCK.EditorWindow.getSelection() ;
        
        if ( toStart == null || toStart === true )
                oSel.collapseToStart() ;
        else
                oSel.collapseToEnd() ;
}

// The "nodeTagName" parameter must be Upper Case.
FCKSelection.HasAncestorNode = function( nodeTagName )
{
        var oContainer = this.GetSelectedElement() ;
        if ( ! oContainer && FCK.EditorWindow )
        {
                try             { oContainer = FCK.EditorWindow.getSelection().getRangeAt(0).startContainer ; }
                catch(e){}
        }

        while ( oContainer )
        {
                if ( oContainer.nodeType == 1 && oContainer.tagName == nodeTagName ) return true ;
                oContainer = oContainer.parentNode ;
        }

        return false ;
}

// The "nodeTagName" parameter must be Upper Case.
FCKSelection.MoveToAncestorNode = function( nodeTagName )
{
        var oNode ;

        var oContainer = this.GetSelectedElement() ;
        if ( ! oContainer )
                oContainer = FCK.EditorWindow.getSelection().getRangeAt(0).startContainer ;

        while ( oContainer )
        {
                if ( oContainer.tagName == nodeTagName ) 
                        return oContainer ;
                oContainer = oContainer.parentNode ;
        }
        return null ;
}

FCKSelection.Delete = function()
{
        // Gets the actual selection.
        var oSel = FCK.EditorWindow.getSelection() ;

        // Deletes the actual selection contents.
        for ( var i = 0 ; i < oSel.rangeCount ; i++ )
        {
                oSel.getRangeAt(i).deleteContents() ;
        }

        return oSel ;
}