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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
nautilus-clipboard-monitor.c: catch clipboard changes.
Copyright (C) 2004 Red Hat, Inc.
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 (at your option) 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.
Author: Alexander Larsson <alexl@redhat.com>
*/
#include <config.h>
#include "nautilus-clipboard-monitor.h"
#include <eel/eel-debug.h>
#include <eel/eel-gtk-macros.h>
#include <eel/eel-glib-extensions.h>
#include <eel/eel-glib-extensions.h>
#include <gtk/gtk.h>
/* X11 has a weakness when it comes to clipboard handling,
* there is no way to get told when the owner of the clipboard
* changes. This is often needed, for instance to set the
* sensitivity of the paste menu item. We work around this
* internally in an app by telling the clipboard monitor when
* we changed the clipboard. Unfortunately this doesn't give
* us perfect results, we still don't catch changes made by
* other clients
*
* This is fixed with the XFIXES extensions, which recent versions
* of Gtk+ supports as the owner_change signal on GtkClipboard. We
* use this now, but keep the old code since not all X servers support
* XFIXES.
*/
enum {
CLIPBOARD_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL];
static void nautilus_clipboard_monitor_init (gpointer object,
gpointer klass);
static void nautilus_clipboard_monitor_class_init (gpointer klass);
EEL_CLASS_BOILERPLATE (NautilusClipboardMonitor,
nautilus_clipboard_monitor,
G_TYPE_OBJECT)
static NautilusClipboardMonitor *clipboard_monitor = NULL;
static void
destroy_clipboard_monitor (void)
{
if (clipboard_monitor != NULL) {
g_object_unref (clipboard_monitor);
}
}
NautilusClipboardMonitor *
nautilus_clipboard_monitor_get (void)
{
GtkClipboard *clipboard;
if (clipboard_monitor == NULL) {
clipboard_monitor = NAUTILUS_CLIPBOARD_MONITOR (g_object_new (NAUTILUS_TYPE_CLIPBOARD_MONITOR, NULL));
eel_debug_call_at_shutdown (destroy_clipboard_monitor);
clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
g_signal_connect (clipboard, "owner_change",
G_CALLBACK (nautilus_clipboard_monitor_emit_changed), NULL);
}
return clipboard_monitor;
}
void
nautilus_clipboard_monitor_emit_changed (void)
{
NautilusClipboardMonitor *monitor;
monitor = nautilus_clipboard_monitor_get ();
g_signal_emit (monitor, signals[CLIPBOARD_CHANGED], 0);
}
static void
nautilus_clipboard_monitor_init (gpointer object, gpointer klass)
{
NautilusClipboardMonitor *monitor;
monitor = NAUTILUS_CLIPBOARD_MONITOR (object);
}
static void
clipboard_monitor_finalize (GObject *object)
{
NautilusClipboardMonitor *monitor;
monitor = NAUTILUS_CLIPBOARD_MONITOR (object);
EEL_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
}
static void
nautilus_clipboard_monitor_class_init (gpointer klass)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (klass);
object_class->finalize = clipboard_monitor_finalize;
signals[CLIPBOARD_CHANGED] =
g_signal_new ("clipboard_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (NautilusClipboardMonitorClass, clipboard_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
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