/*
 * HelpTOCPanel.java - Help table of contents
 * :tabSize=8:indentSize=8:noTabs=false:
 * :folding=explicit:collapseFolds=1:
 *
 * Copyright (C) 1999, 2004 Slava Pestov
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package org.gjt.sp.jedit.help;

//{{{ Imports
import com.microstar.xml.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.tree.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.*;
import org.gjt.sp.jedit.browser.FileCellRenderer; // for icons
import org.gjt.sp.jedit.io.VFSManager;
import org.gjt.sp.jedit.*;
import org.gjt.sp.util.Log;
//}}}

class HelpTOCPanel extends JPanel
{
	//{{{ HelpTOCPanel constructor
	HelpTOCPanel(HelpViewer helpViewer)
	{
		super(new BorderLayout());

		this.helpViewer = helpViewer;
		nodes = new Hashtable();

		toc = new TOCTree();

		// looks bad with the OS X L&F, apparently...
		if(!OperatingSystem.isMacOSLF())
			toc.putClientProperty("JTree.lineStyle", "Angled");

		toc.setCellRenderer(new TOCCellRenderer());
		toc.setEditable(false);
		toc.setShowsRootHandles(true);

		add(BorderLayout.CENTER,new JScrollPane(toc));

		load();
	} //}}}

	//{{{ selectNode() method
	void selectNode(String shortURL)
	{
		if(tocModel == null)
			return;

		DefaultMutableTreeNode node = (DefaultMutableTreeNode)nodes.get(shortURL);

		if(node == null)
			return;

		TreePath path = new TreePath(tocModel.getPathToRoot(node));
		toc.expandPath(path);
		toc.setSelectionPath(path);
		toc.scrollPathToVisible(path);
	} //}}}

	//{{{ load() method
	void load()
	{
		DefaultTreeModel empty = new DefaultTreeModel(
			new DefaultMutableTreeNode(
			jEdit.getProperty("helpviewer.toc.loading")));
		toc.setModel(empty);
		toc.setRootVisible(true);

		VFSManager.runInWorkThread(new Runnable()
		{
			public void run()
			{
				createTOC();
				tocModel.reload(tocRoot);
				toc.setModel(tocModel);
				toc.setRootVisible(false);
				for(int i = 0; i