| /* GtkClipboardNotifier.java -- Helper for announcing GtkSelection changes. |
| Copyright (C) 2005, 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.awt.peer.gtk; |
| |
| |
| class GtkClipboardNotifier extends Thread |
| { |
| /** Whether to announce a new GtkSelection has been set for CLIPBOARD. */ |
| static private boolean announceClipboardChange; |
| |
| /** Whether to announce a new GtkSelection has been set for PRIMARY. */ |
| static private boolean announcePrimaryChange; |
| |
| /** |
| * The one and only instance. All operations are synchronized on |
| * this. |
| */ |
| private static GtkClipboardNotifier notifier = new GtkClipboardNotifier(); |
| |
| /** |
| * Creates a deamon thread that monitors this for change |
| * announcements. |
| */ |
| private GtkClipboardNotifier() |
| { |
| super("GtkClipBoardNotifier"); |
| setDaemon(true); |
| start(); |
| } |
| |
| /** |
| * Notifies that a new GtkSelection has to be announced. |
| * |
| * @param clipboard either the GtkClipboard.clipboard or the |
| * GtkClipboard.selection. |
| */ |
| static void announce(GtkClipboard clipboard) |
| { |
| synchronized (notifier) |
| { |
| if (clipboard == GtkClipboard.clipboard) |
| announceClipboardChange = true; |
| else |
| announcePrimaryChange = true; |
| notifier.notifyAll(); |
| } |
| } |
| |
| public void run() |
| { |
| GtkClipboard clipboard; |
| while (true) |
| { |
| synchronized (this) |
| { |
| while (! announceClipboardChange && ! announcePrimaryChange) |
| { |
| try |
| { |
| this.wait(); |
| } |
| catch (InterruptedException ie) |
| { |
| // ignore |
| } |
| } |
| |
| if (announceClipboardChange) |
| { |
| clipboard = GtkClipboard.clipboard; |
| announceClipboardChange = false; |
| } |
| else |
| { |
| clipboard = GtkClipboard.selection; |
| announcePrimaryChange = false; |
| } |
| } |
| |
| // Do the actual announcement without the lock held. We will |
| // notice a new change after this notification has finished. |
| try |
| { |
| clipboard.setContents(new GtkSelection(clipboard), null); |
| } |
| catch (Throwable t) |
| { |
| // should never happen, but might if we have some faulty |
| // listener. |
| t.printStackTrace(); |
| } |
| } |
| } |
| } |