inicial

1 files changed, 233 insertions, 0 deletions

diff --git a/shell/ev-media-player-keys.c b/shell/ev-media-player-keys.c
new file mode 100644
index 00000000..f3237873
--- /dev/null
+++ b/shell/ev-media-player-keys.c
@@ -0,0 +1,233 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* 
+ * Copyright (C) 2007 Jan Arne Petersen <[email protected]>
+ * Copyright (C) 2008 Bastien Nocera <[email protected]>
+ * Copyright © 2010 Christian Persch
+ *
+ * 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 "ev-media-player-keys.h"
+
+#include <string.h>
+#include <glib.h>
+#include <gio/gio.h>
+
+#define SD_NAME        "org.mate.SettingsDaemon"
+#define SD_OBJECT_PATH "/org/mate/SettingsDaemon/MediaKeys"
+#define SD_INTERFACE   "org.mate.SettingsDaemon.MediaKeys"
+
+enum {
+	KEY_PRESSED,
+	LAST_SIGNAL
+};
+
+struct _EvMediaPlayerKeys
+{
+	GObject        parent;
+
+        GDBusProxy *proxy;
+	gboolean    has_name_owner;
+};
+
+struct _EvMediaPlayerKeysClass
+{
+	GObjectClass parent_class;
+
+	/* Signals */
+	void (* key_pressed) (EvMediaPlayerKeys *keys,
+			      const gchar       *key);
+};
+
+static guint signals[LAST_SIGNAL];
+
+G_DEFINE_TYPE (EvMediaPlayerKeys, ev_media_player_keys, G_TYPE_OBJECT)
+
+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;
+
+	signals[KEY_PRESSED] =
+		g_signal_new ("key_pressed",
+			      EV_TYPE_MEDIA_PLAYER_KEYS,
+			      G_SIGNAL_RUN_LAST,
+			      G_STRUCT_OFFSET (EvMediaPlayerKeysClass, key_pressed),
+			      NULL, NULL,
+			      g_cclosure_marshal_VOID__STRING,
+			      G_TYPE_NONE,
+			      1, G_TYPE_STRING);
+}
+
+static void
+ev_media_player_keys_update_has_name_owner (EvMediaPlayerKeys *keys)
+{
+	gchar *name_owner;
+
+	if (!keys->proxy) {
+		keys->has_name_owner = FALSE;
+		return;
+	}
+
+	name_owner = g_dbus_proxy_get_name_owner (keys->proxy);
+	keys->has_name_owner = (name_owner != NULL);
+	g_free (name_owner);
+}
+
+static void
+ev_media_player_keys_grab_keys (EvMediaPlayerKeys *keys)
+{
+	if (!keys->has_name_owner)
+		return;
+
+	/*
+	 * The uint as second argument is time. We give a very low value so that
+	 * if a media player is there it gets higher priority on the keys (0 is
+	 * a special value having maximum priority).
+	 */
+        g_dbus_proxy_call (keys->proxy,
+			   "GrabMediaPlayerKeys",
+			   g_variant_new ("(su)", "Evince", 1),
+			   G_DBUS_CALL_FLAGS_NO_AUTO_START,
+			   -1,
+			   NULL, NULL, NULL);
+}
+
+static void
+ev_media_player_keys_release_keys (EvMediaPlayerKeys *keys)
+{
+	if (!keys->has_name_owner)
+		return;
+
+        g_dbus_proxy_call (keys->proxy,
+			   "ReleaseMediaPlayerKeys",
+			   g_variant_new ("(s)", "Evince"),
+			   G_DBUS_CALL_FLAGS_NO_AUTO_START,
+			   -1,
+			   NULL, NULL, NULL);
+}
+
+static void
+media_player_key_pressed_cb (GDBusProxy *proxy,
+			     gchar      *sender_name,
+			     gchar      *signal_name,
+			     GVariant   *parameters,
+			     gpointer    user_data)
+{
+        const char *application, *key;
+
+        if (g_strcmp0 (sender_name, SD_NAME) != 0)
+                return;
+
+        if (g_strcmp0 (signal_name, "MediaPlayerKeyPressed") != 0)
+                return;
+
+        if (!g_variant_is_of_type (parameters, G_VARIANT_TYPE ("(ss)")))
+                return;
+
+        g_variant_get (parameters, "(&s&s)", &application, &key);
+
+        if (strcmp ("Evince", application) == 0) {
+                g_signal_emit (user_data, signals[KEY_PRESSED], 0, key);
+        }
+}
+
+static void
+mediakeys_name_owner_changed (GObject    *object,
+			      GParamSpec *pspec,
+			      gpointer    user_data)
+{
+	EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (user_data);
+
+	ev_media_player_keys_update_has_name_owner (keys);
+}
+
+static void
+mediakeys_service_appeared_cb (GObject      *source_object,
+			       GAsyncResult *res,
+			       gpointer      user_data)
+{
+        EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (user_data);
+	GDBusProxy *proxy;
+
+	proxy = g_dbus_proxy_new_for_bus_finish (res, NULL);
+
+	if (proxy == NULL) {
+		return;
+	}
+
+	g_signal_connect (proxy, "g-signal",
+			  G_CALLBACK (media_player_key_pressed_cb),
+			  keys);
+	g_signal_connect (proxy, "notify::g-name-owner",
+			  G_CALLBACK (mediakeys_name_owner_changed),
+			  keys);
+
+	keys->proxy = proxy;
+	ev_media_player_keys_update_has_name_owner (keys);
+	ev_media_player_keys_grab_keys (keys);
+}
+
+static void
+ev_media_player_keys_init (EvMediaPlayerKeys *keys)
+{
+	g_dbus_proxy_new_for_bus (G_BUS_TYPE_SESSION,
+				  G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES,
+				  NULL,
+				  SD_NAME,
+				  SD_OBJECT_PATH,
+				  SD_INTERFACE,
+				  NULL,
+				  mediakeys_service_appeared_cb,
+				  keys);
+}
+
+void
+ev_media_player_keys_focused (EvMediaPlayerKeys *keys)
+{
+	if (keys->proxy == NULL)
+		return;
+	
+	ev_media_player_keys_grab_keys (keys);
+}
+
+static void
+ev_media_player_keys_finalize (GObject *object)
+{
+	EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (object);
+
+        if (keys->proxy != NULL) {
+		ev_media_player_keys_release_keys (keys);
+                g_object_unref (keys->proxy);
+		keys->proxy = NULL;
+		keys->has_name_owner = FALSE;
+	}
+
+	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);
+}
+