[shell] Track media keys proxy name owner to enable/disable it

diff --git a/shell/ev-media-player-keys.c b/shell/ev-media-player-keys.c
index a022eafb405d46ef65b91874054bea9747915232..647a6186795e423bb37e797828ebc3003fed8a90 100644 (file)
--- a/shell/ev-media-player-keys.c
+++ b/shell/ev-media-player-keys.c
@@ -42,6 +42,7 @@ struct _EvMediaPlayerKeys
        GObject        parent;
 
         GDBusProxy *proxy;
+       gboolean    has_name_owner;
 };
 
 struct _EvMediaPlayerKeysClass
@@ -77,9 +78,27 @@ ev_media_player_keys_class_init (EvMediaPlayerKeysClass *klass)
                              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
@@ -96,6 +115,9 @@ ev_media_player_keys_grab_keys (EvMediaPlayerKeys *keys)
 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"),
@@ -129,6 +151,16 @@ media_player_key_pressed_cb (GDBusProxy *proxy,
         }
 }
 
+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,
@@ -146,8 +178,12 @@ mediakeys_service_appeared_cb (GObject      *source_object,
        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);
 }
 
@@ -183,6 +219,7 @@ ev_media_player_keys_finalize (GObject *object)
                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);