/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

package com.sun.star.xml.security.uno;

import org.w3c.dom.Document;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeModelEvent;
import javax.swing.tree.TreePath;
import java.util.Enumeration;
import java.util.Vector;

/*
 * This adapter converts the current Document (a DOM) into 
 * a JTree model. 
 */
class DomToTreeModelAdapter 
	implements javax.swing.tree.TreeModel 
{
	private Document m_document;
	private Vector m_listenerList = new Vector();

	public DomToTreeModelAdapter(Document document)
	{
		m_document = document;
	}

	/*
	 * Basic TreeModel operations 
	 */
	public Object  getRoot() 
	{
		return new AdapterNode(m_document);
	}

	public boolean isLeaf(Object aNode) 
	{
		boolean rc = true;
		
		/*
		 * Determines whether the icon shows up to the left.
		 * Return true for any node with no children.
		 */
		AdapterNode node = (AdapterNode) aNode;
		
		if (node.childCount() > 0)
		{
			rc = false;
		}
		
		return rc;
	}
	
	public int getChildCount(Object parent) 
	{
		AdapterNode node = (AdapterNode) parent;
		return node.childCount();
	}
	
	public Object getChild(Object parent, int index) 
	{
		AdapterNode node = (AdapterNode) parent;
		return node.child(index);
	}
	
	public int getIndexOfChild(Object parent, Object child) 
	{
		AdapterNode node = (AdapterNode) parent;
		return node.index((AdapterNode) child);
	}
	
	public void valueForPathChanged(TreePath path, Object newValue) 
	{
		/*
		 * Null. We won't be making changes in the GUI
		 * If we did, we would ensure the new value was really new,
		 * adjust the model, and then fire a TreeNodesChanged event.
		 */
	}

	public void addTreeModelListener(TreeModelListener listener) 
	{
		if ( listener != null 
			&& ! m_listenerList.contains( listener ) ) 
		{
			m_listenerList.addElement( listener );
		}
	}
	
	public void removeTreeModelListener(TreeModelListener listener) 
	{
		if ( listener != null ) 
		{
			m_listenerList.removeElement( listener );
		}
	}
	
	public void fireTreeNodesChanged( TreeModelEvent e ) 
	{
		Enumeration listeners = m_listenerList.elements();
		while ( listeners.hasMoreElements() ) 
		{
			TreeModelListener listener = 
			(TreeModelListener) listeners.nextElement();
			listener.treeNodesChanged( e );
		}
	} 

	public void fireTreeNodesInserted( TreeModelEvent e ) 
	{
		Enumeration listeners = m_listenerList.elements();
		while ( listeners.hasMoreElements() ) 
		{
			TreeModelListener listener =
			(TreeModelListener) listeners.nextElement();
			listener.treeNodesInserted( e );
		}
	}   

	public void fireTreeNodesRemoved( TreeModelEvent e ) 
	{
		Enumeration listeners = m_listenerList.elements();
		while ( listeners.hasMoreElements() ) 
		{
			TreeModelListener listener = 
			(TreeModelListener) listeners.nextElement();
			listener.treeNodesRemoved( e );
		}
	}   

	public void fireTreeStructureChanged( TreeModelEvent e ) 
	{
		Enumeration listeners = m_listenerList.elements();
		while ( listeners.hasMoreElements() ) 
		{
			TreeModelListener listener =
			(TreeModelListener) listeners.nextElement();
			listener.treeStructureChanged( e );
		}
	}
}