mirror of git://gcc.gnu.org/git/gcc.git
130 lines
4.0 KiB
Java
130 lines
4.0 KiB
Java
/* GtkClipboardNotifier.java -- Helper for announcing GtkSelection changes.
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Copyright (C) 2005, 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.awt.peer.gtk;
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class GtkClipboardNotifier extends Thread
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{
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/** Whether to announce a new GtkSelection has been set for CLIPBOARD. */
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static private boolean announceClipboardChange;
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/** Whether to announce a new GtkSelection has been set for PRIMARY. */
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static private boolean announcePrimaryChange;
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/**
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* The one and only instance. All operations are synchronized on
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* this.
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*/
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private static GtkClipboardNotifier notifier = new GtkClipboardNotifier();
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/**
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* Creates a deamon thread that monitors this for change
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* announcements.
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*/
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private GtkClipboardNotifier()
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{
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super("GtkClipBoardNotifier");
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setDaemon(true);
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start();
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}
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/**
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* Notifies that a new GtkSelection has to be announced.
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*
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* @param clipboard either the GtkClipboard.clipboard or the
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* GtkClipboard.selection.
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*/
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static void announce(GtkClipboard clipboard)
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{
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synchronized (notifier)
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{
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if (clipboard == GtkClipboard.clipboard)
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announceClipboardChange = true;
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else
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announcePrimaryChange = true;
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notifier.notifyAll();
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}
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}
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public void run()
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{
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GtkClipboard clipboard;
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while (true)
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{
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synchronized (this)
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{
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while (! announceClipboardChange && ! announcePrimaryChange)
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{
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try
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{
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this.wait();
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}
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catch (InterruptedException ie)
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{
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// ignore
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}
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}
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if (announceClipboardChange)
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{
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clipboard = GtkClipboard.clipboard;
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announceClipboardChange = false;
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}
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else
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{
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clipboard = GtkClipboard.selection;
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announcePrimaryChange = false;
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}
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}
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// Do the actual announcement without the lock held. We will
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// notice a new change after this notification has finished.
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try
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{
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clipboard.setContents(new GtkSelection(clipboard), null);
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}
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catch (Throwable t)
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{
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// should never happen, but might if we have some faulty listener.
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t.printStackTrace();
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}
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}
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}
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}
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