/*
 * FileRootsVFS.java - Local root filesystems VFS
 * :tabSize=8:indentSize=8:noTabs=false:
 * :folding=explicit:collapseFolds=1:
 *
 * Copyright (C) 2000, 2003 Slava Pestov
 * Portions copyright (C) 2002 Kris Kopicki
 * Portions copyright (C) 2002 Carmine Lucarelli
 *
 * 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.io;

//{{{ Imports
import javax.swing.filechooser.FileSystemView;
import java.awt.Component;
import java.lang.reflect.*;
import java.io.File;
import java.util.LinkedList;
import org.gjt.sp.jedit.MiscUtilities;
import org.gjt.sp.jedit.OperatingSystem;
import org.gjt.sp.util.Log;
//}}}

/**
 * A VFS that lists local root filesystems.
 * @author Slava Pestov
 * @version $Id: FileRootsVFS.java,v 1.18 2004/07/12 19:25:07 spestov Exp $
 */
public class FileRootsVFS extends VFS
{
	public static final String PROTOCOL = "roots";

	//{{{ FileRootsVFS constructor
	public FileRootsVFS()
	{
		super("roots",LOW_LATENCY_CAP,new String[] {
			EA_TYPE });

		// JDK 1.4 adds methods to obtain a drive letter label and
		// list the desktop on Windows
		if(OperatingSystem.hasJava14())
		{
			try
			{
				getSystemDisplayName = FileSystemView.class.getMethod("getSystemDisplayName",
					new Class[] { java.io.File.class });
				getRoots = FileSystemView.class.getMethod("getRoots",
					new Class[0]);
				isFileSystemRoot = FileSystemView.class.getMethod("isFileSystemRoot",
					new Class[] { java.io.File.class });
				isFloppyDrive = FileSystemView.class.getMethod("isFloppyDrive",
					new Class[] { java.io.File.class });
				isDrive = FileSystemView.class.getMethod("isDrive",
					new Class[] { java.io.File.class });
				fsView = FileSystemView.getFileSystemView();
				Log.log(Log.DEBUG,this,"Java 1.4 FileSystemView detected");
			}
			catch(Exception e)
			{
				Log.log(Log.DEBUG,this,"Java 1.4 FileSystemView not detected");
			}
		}
	} //}}}

	//{{{ getParentOfPath() method
	public String getParentOfPath(String path)
	{
		return PROTOCOL + ":";
	} //}}}

	//{{{ _listDirectory() method
	public VFS.DirectoryEntry[] _listDirectory(Object session, String url,
		Component comp)
	{
		File[] roots = listRoots();

		if(roots == null)
			return null;

		VFS.DirectoryEntry[] rootDE = new VFS.DirectoryEntry[roots.length];
		for(int i = 0; i < roots.length; i++)
			rootDE[i] = new RootsEntry(roots[i]);

		return rootDE;
	} //}}}

	//{{{ _getDirectoryEntry() method
	public DirectoryEntry _getDirectoryEntry(Object session, String path,
		Component comp)
	{
		return new RootsEntry(new File(path));
	} //}}}

	//{{{ Private members
	private static FileSystemView fsView;
	private static Method getSystemDisplayName;
	private static Method getRoots;
	private static Method isFileSystemRoot;
	private static Method isFloppyDrive;
	private static Method isDrive;

	//{{{ listRoots() method
	private static File[] listRoots()
	{
		if (OperatingSystem.isMacOS())
		{
			// Nasty hardcoded values
			File[] volumes = new File("/Volumes").listFiles();
			LinkedList roots = new LinkedList();

			roots.add(new File("/"));

			for (int i=0; i