When building with D-Bus support, listen for multimedia key events from

2008-06-24  Bastien Nocera  <hadess@hadess.net>

	* shell/Makefile.am:
	* shell/ev-application.c (ev_application_init),
	(ev_application_get_media_keys):
	* shell/ev-application.h:
	* shell/ev-marshal.list:
	* shell/ev-media-player-keys.c (ev_media_player_keys_class_init),
	(proxy_destroy), (on_media_player_key_pressed),
	(ev_media_player_keys_init), (ev_media_player_keys_focused),
	(ev_media_player_keys_finalize), (ev_media_player_keys_new):
	* shell/ev-media-player-keys.h:
	* shell/ev-window.c (ev_window_go_previous_page),
	(ev_window_go_next_page), (ev_window_go_first_page),
	(ev_window_go_last_page), (ev_window_start_presentation),
	(ev_window_dispose), (view_actions_focus_in_cb):
	* shell/ev-window.h: When building with D-Bus support, listen
	for multimedia key events from gnome-settings-daemon. This allows
	to go to the next/previous/first/last pages using, respectively,
	Next/Previous/Rewing/Fast Forward. The Play button is used to start
	a presentation. Fixes bug #539971.


svn path=/trunk/; revision=3059

1 files changed, 191 insertions, 0 deletions

diff --git a/shell/ev-media-player-keys.c b/shell/ev-media-player-keys.c
new file mode 100644
index 0000000..c244b2e
--- /dev/null
+++ b/shell/ev-media-player-keys.c
@@ -0,0 +1,191 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* 
+ * Copyright (C) 2007 Jan Arne Petersen <jap@gnome.org>
+ * Copyright (C) 2008 Bastien Nocera <hadess@hadess.net>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA.
+ *
+ */
+
+#include "config.h"
+
+#include <glib.h>
+#include <glib-object.h>
+#include <glib/gi18n-lib.h>
+#include <gmodule.h>
+#include <dbus/dbus-glib.h>
+#include <string.h>
+
+#include "ev-media-player-keys.h"
+
+#include "ev-marshal.h"
+
+struct _EvMediaPlayerKeys
+{
+	GObject        parent;
+	DBusGProxy    *media_player_keys_proxy;
+	EvWindow      *window;
+};
+
+struct _EvMediaPlayerKeysClass
+{
+	GObjectClass parent_class;
+};
+
+G_DEFINE_TYPE (EvMediaPlayerKeys, ev_media_player_keys, G_TYPE_OBJECT)
+
+static void ev_media_player_keys_init		(EvMediaPlayerKeys *keys);
+static void ev_media_player_keys_finalize	(GObject *object);
+
+static void
+ev_media_player_keys_class_init (EvMediaPlayerKeysClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+	object_class->finalize = ev_media_player_keys_finalize;
+}
+
+static void
+proxy_destroy (DBusGProxy *proxy,
+	       EvMediaPlayerKeys* keys)
+{
+	keys->media_player_keys_proxy = NULL;
+}
+
+static void
+on_media_player_key_pressed (DBusGProxy *proxy, const gchar *application, const gchar *key, EvMediaPlayerKeys *keys)
+{
+	if (strcmp ("Evince", application) == 0 && keys->window != NULL) {
+		/* Note how Previous/Next only go to the
+		 * next/previous page despite their icon telling you
+		 * they should go to the beginning/end.
+		 *
+		 * There's very few keyboards with FFW/RWD though,
+		 * so we stick the most useful keybinding on the most
+		 * often seen keys
+		 */
+		if (strcmp ("Play", key) == 0) {
+			ev_window_start_presentation (keys->window);
+		} else if (strcmp ("Previous", key) == 0) {
+			ev_window_go_previous_page (keys->window);
+		} else if (strcmp ("Next", key) == 0) {
+			ev_window_go_next_page (keys->window);
+		} else if (strcmp ("FastForward", key) == 0) {
+			ev_window_go_last_page (keys->window);
+		} else if (strcmp ("Rewind", key) == 0) {
+			ev_window_go_first_page (keys->window);
+		}
+	}
+}
+
+static void
+ev_media_player_keys_init (EvMediaPlayerKeys *keys)
+{
+	DBusGConnection *connection;
+	GError *err = NULL;
+
+	connection = dbus_g_bus_get (DBUS_BUS_SESSION, &err);
+	if (connection == NULL) {
+		g_warning ("Error connecting to D-Bus: %s", err->message);
+		return;
+	}
+
+	/* Try the gnome-settings-daemon version,
+	 * then the gnome-control-center version of things */
+	keys->media_player_keys_proxy = dbus_g_proxy_new_for_name_owner (connection,
+								       "org.gnome.SettingsDaemon",
+								       "/org/gnome/SettingsDaemon/MediaKeys",
+								       "org.gnome.SettingsDaemon.MediaKeys",
+								       NULL);
+	if (keys->media_player_keys_proxy == NULL) {
+		keys->media_player_keys_proxy = dbus_g_proxy_new_for_name_owner (connection,
+									       "org.gnome.SettingsDaemon",
+									       "/org/gnome/SettingsDaemon",
+									       "org.gnome.SettingsDaemon",
+									       &err);
+	}
+
+	dbus_g_connection_unref (connection);
+	if (err != NULL) {
+		g_warning ("Failed to create dbus proxy for org.gnome.SettingsDaemon: %s",
+			   err->message);
+		g_error_free (err);
+		return;
+	} else {
+		g_signal_connect_object (keys->media_player_keys_proxy,
+					 "destroy",
+					 G_CALLBACK (proxy_destroy),
+					 keys, 0);
+	}
+
+	dbus_g_proxy_call (keys->media_player_keys_proxy,
+			   "GrabMediaPlayerKeys", NULL,
+			   G_TYPE_STRING, "Evince", G_TYPE_UINT, 0, G_TYPE_INVALID,
+			   G_TYPE_INVALID);
+
+	dbus_g_object_register_marshaller (ev_marshal_VOID__STRING_STRING,
+					   G_TYPE_NONE, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_INVALID);
+	dbus_g_proxy_add_signal (keys->media_player_keys_proxy, "MediaPlayerKeyPressed",
+				 G_TYPE_STRING, G_TYPE_STRING, G_TYPE_INVALID);
+
+	dbus_g_proxy_connect_signal (keys->media_player_keys_proxy, "MediaPlayerKeyPressed",
+				     G_CALLBACK (on_media_player_key_pressed), keys, NULL);
+}
+
+void
+ev_media_player_keys_focused (EvMediaPlayerKeys *keys, EvWindow *window)
+{
+	if (keys->media_player_keys_proxy != NULL) {
+		if (keys->window != NULL) {
+			g_object_unref (keys->window);
+			keys->window = NULL;
+		}
+		if (window != NULL) {
+			dbus_g_proxy_call (keys->media_player_keys_proxy,
+					   "GrabMediaPlayerKeys", NULL,
+					   G_TYPE_STRING, "Evince", G_TYPE_UINT, 0, G_TYPE_INVALID,
+					   G_TYPE_INVALID);
+			keys->window = g_object_ref (window);
+		}
+	}
+}
+
+static void
+ev_media_player_keys_finalize (GObject *object)
+{
+	EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (object);
+
+	if (keys->media_player_keys_proxy != NULL) {
+		dbus_g_proxy_call (keys->media_player_keys_proxy,
+				   "ReleaseMediaPlayerKeys", NULL,
+				   G_TYPE_STRING, "Ev", G_TYPE_INVALID, G_TYPE_INVALID);
+		g_object_unref (keys->media_player_keys_proxy);
+		keys->media_player_keys_proxy = NULL;
+	}
+
+	if (keys->window != NULL) {
+		g_object_unref (keys->window);
+		keys->window = NULL;
+	}
+
+	G_OBJECT_CLASS (ev_media_player_keys_parent_class)->finalize (object);
+}
+
+EvMediaPlayerKeys *
+ev_media_player_keys_new (void)
+{
+	return g_object_new (EV_TYPE_MEDIA_PLAYER_KEYS, NULL);
+}
+