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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/awt/peer/gtk/GtkClipboardNotifier.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/awt/peer/gtk/GtkClipboardNotifier.java')
-rw-r--r-- | libjava/classpath/gnu/java/awt/peer/gtk/GtkClipboardNotifier.java | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/peer/gtk/GtkClipboardNotifier.java b/libjava/classpath/gnu/java/awt/peer/gtk/GtkClipboardNotifier.java new file mode 100644 index 000000000..8e5934557 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/peer/gtk/GtkClipboardNotifier.java @@ -0,0 +1,129 @@ +/* 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(); + } + } + } +} |