recentfilesmenu.java

Java写的文本编辑器

/*
 * RecentFilesMenu.java - Recent file list menu
 * Copyright (C) 2000, 2001 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.gui;

import javax.swing.*;
import java.awt.event.*;
import java.util.Vector;
import org.gjt.sp.jedit.io.VFSManager;
import org.gjt.sp.jedit.io.VFS;
import org.gjt.sp.jedit.*;

public class RecentFilesMenu extends EnhancedMenu
{
	public RecentFilesMenu()
	{
		super("recent-files");
	}

	public void setPopupMenuVisible(boolean b)
	{
		if(b)
		{
			final View view = EditAction.getView(this);

			if(getMenuComponentCount() != 0)
				removeAll();

			ActionListener actionListener = new ActionListener()
			{
				public void actionPerformed(ActionEvent evt)
				{
					jEdit.openFile(view,evt.getActionCommand());
					view.getStatus().setMessage(null);
				}
			};

			MouseListener mouseListener = new MouseAdapter()
			{
				public void mouseEntered(MouseEvent evt)
				{
					view.getStatus().setMessage(
						((JMenuItem)evt.getSource())
						.getActionCommand());
				}

				public void mouseExited(MouseEvent evt)
				{
					view.getStatus().setMessage(null);
				}
			};

			Vector recentVector = BufferHistory.getBufferHistory();

			if(recentVector.size() == 0)
			{
				add(GUIUtilities.loadMenuItem("no-recent"));
				return;
			}

			/*
			 * While recentVector has 50 entries or so, we only display
			 * a few of those in the menu (otherwise it will be way too
			 * long)
			 */
			int recentFileCount = Math.min(recentVector.size(),
				Integer.parseInt(jEdit.getProperty("history")));

			for(int i = recentVector.size() - 1;
				i >= recentVector.size() - recentFileCount;
				i--)
			{
				String path = ((BufferHistory.Entry)recentVector
					.elementAt(i)).path;
				VFS vfs = VFSManager.getVFSForPath(path);
				JMenuItem menuItem = new JMenuItem(vfs.getFileName(path));
				menuItem.setActionCommand(path);
				menuItem.addActionListener(actionListener);
				menuItem.addMouseListener(mouseListener);
				add(menuItem);
			}
		}

		super.setPopupMenuVisible(b);
	}
}