recentfilesmenu.java

用java 编写的源码开放的文本编辑器。有很多有用的特性

/*
 * RecentFilesMenu.java - Recent file list menu
 * :tabSize=8:indentSize=8:noTabs=false:
 * :folding=explicit:collapseFolds=1:
 *
 * 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;

//{{{ Imports
import javax.swing.event.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.Vector;
import org.gjt.sp.jedit.browser.FileCellRenderer;
import org.gjt.sp.jedit.io.VFSManager;
import org.gjt.sp.jedit.io.VFS;
import org.gjt.sp.jedit.*;
//}}}

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

	//{{{ menuSelected() method
	public void menuSelected(MenuEvent evt)
	{
		super.menuSelected(evt);
		final View view = GUIUtilities.getView(this);

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

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

		//{{{ MouseListener...
		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-files"));
			return;
		}

		Vector menuItems = new Vector();
		boolean sort = jEdit.getBooleanProperty("sortRecent");

		/*
		 * 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(),
			jEdit.getIntegerProperty("history",25));

		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);
			menuItem.setIcon(FileCellRenderer.fileIcon);

			if(sort)
				menuItems.addElement(menuItem);
			else
				add(menuItem);
		}

		if(sort)
		{
			MiscUtilities.quicksort(menuItems,
				new MiscUtilities.MenuItemCompare());
			for(int i = 0; i < menuItems.size(); i++)
			{
				add((JMenuItem)menuItems.elementAt(i));
			}
		}
	} //}}}

	public void menuDeselected(MenuEvent e) {}

	public void menuCanceled(MenuEvent e) {}
}