Blame SOURCES/evince-3.28.2-media-player-keys.patch

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--- a/shell/ev-media-player-keys.c
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+++ b/shell/ev-media-player-keys.c
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@@ -41,8 +41,9 @@ struct _EvMediaPlayerKeys
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 {
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 	GObject        parent;
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-        GDBusProxy *proxy;
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-	gboolean    has_name_owner;
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+        GDBusProxy   *proxy;
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+	gboolean      has_name_owner;
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+	GCancellable *cancellable;
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 };
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 struct _EvMediaPlayerKeysClass
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@@ -163,7 +164,7 @@ mediakeys_service_appeared_cb (GObject      *source_object,
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 			       GAsyncResult *res,
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 			       gpointer      user_data)
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 {
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-        EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (user_data);
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+	EvMediaPlayerKeys *keys;
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 	GDBusProxy *proxy;
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 	proxy = g_dbus_proxy_new_for_bus_finish (res, NULL);
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@@ -172,6 +173,7 @@ mediakeys_service_appeared_cb (GObject      *source_object,
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 		return;
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 	}
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+	keys = EV_MEDIA_PLAYER_KEYS (user_data);
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 	g_signal_connect (proxy, "g-signal",
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 			  G_CALLBACK (media_player_key_pressed_cb),
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 			  keys);
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@@ -187,13 +189,15 @@ mediakeys_service_appeared_cb (GObject      *source_object,
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 static void
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 ev_media_player_keys_init (EvMediaPlayerKeys *keys)
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 {
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+	keys->cancellable = g_cancellable_new ();
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+
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 	g_dbus_proxy_new_for_bus (G_BUS_TYPE_SESSION,
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 				  G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES,
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 				  NULL,
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 				  SD_NAME,
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 				  SD_OBJECT_PATH,
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 				  SD_INTERFACE,
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-				  NULL,
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+				  keys->cancellable,
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 				  mediakeys_service_appeared_cb,
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 				  keys);
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 }
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@@ -212,6 +216,9 @@ ev_media_player_keys_finalize (GObject *object)
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 {
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 	EvMediaPlayerKeys *keys = EV_MEDIA_PLAYER_KEYS (object);
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+	g_cancellable_cancel (keys->cancellable);
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+	g_object_unref (keys->cancellable);
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+
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         if (keys->proxy != NULL) {
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 		ev_media_player_keys_release_keys (keys);
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                 g_object_unref (keys->proxy);