Adding an env variable to put a service in replace mode

3 files changed, 58 insertions, 4 deletions

diff --git a/libindicator/indicator-service-manager.c b/libindicator/indicator-service-manager.c
index f3a29d0..f58c148 100644
--- a/libindicator/indicator-service-manager.c
+++ b/libindicator/indicator-service-manager.c
@@ -536,8 +536,9 @@ service_proxy_name_changed (GDBusConnection * connection, const gchar * sender_n
 {
 	IndicatorServiceManagerPrivate * priv = INDICATOR_SERVICE_MANAGER_GET_PRIVATE(user_data);
 
-	const gchar * new_name;
-	g_variant_get(parameters, "(&s&s&s)", NULL, NULL, &new_name);
+	const gchar * new_name = NULL;
+	const gchar * prev_name = NULL;
+	g_variant_get(parameters, "(&s&s&s)", NULL, &prev_name, &new_name);
 
 	if (new_name == NULL || new_name[0] == 0) {
 		if (priv->connected) {
@@ -547,10 +548,27 @@ service_proxy_name_changed (GDBusConnection * connection, const gchar * sender_n
 
 		start_service_again(INDICATOR_SERVICE_MANAGER(user_data));
 	} else {
+		/* If we weren't connected before, we are now.  Let's tell the
+		   world! */
 		if (!priv->connected) {
 			priv->connected = TRUE;
 			g_signal_emit(G_OBJECT(user_data), signals[CONNECTION_CHANGE], 0, TRUE, TRUE);
 		}
+
+		/* If the names are both valid, and they're not the same, it means that
+		   we've actually changed.  So we need to tell the new guy that we're
+		   watching them */
+		if (new_name != NULL && prev_name != NULL && new_name[0] != 0 && prev_name != 0 && g_strcmp0(prev_name, new_name) != 0) {
+			/* Send watch */
+			g_dbus_proxy_call(priv->service_proxy,
+			                  "Watch",
+			                  NULL, /* params */
+			                  G_DBUS_CALL_FLAGS_NONE,
+			                  -1,
+			                  priv->watch_cancel,
+			                  watch_cb,
+			                  user_data);
+		}
 	}
 
 	return;
diff --git a/libindicator/indicator-service.c b/libindicator/indicator-service.c
index e5eaa5b..d7ab375 100644
--- a/libindicator/indicator-service.c
+++ b/libindicator/indicator-service.c
@@ -57,6 +57,7 @@ struct _IndicatorServicePrivate {
 	GHashTable * watchers;
 	guint this_service_version;
 	guint dbus_registration;
+	gboolean replace_mode;
 };
 
 /* Signals Stuff */
@@ -192,6 +193,7 @@ indicator_service_init (IndicatorService *self)
 	priv->this_service_version = 0;
 	priv->timeout_length = 500;
 	priv->dbus_registration = 0;
+	priv->replace_mode = FALSE;
 
 	const gchar * timeoutenv = g_getenv("INDICATOR_SERVICE_SHUTDOWN_TIMEOUT");
 	if (timeoutenv != NULL) {
@@ -202,6 +204,12 @@ indicator_service_init (IndicatorService *self)
 		}
 	}
 
+	const gchar * replaceenv = g_getenv("INDICATOR_SERVICE_REPLACE_MODE");
+	if (replaceenv != NULL) {
+		priv->replace_mode = TRUE;
+		g_debug("Putting into replace mode");
+	}
+
 	/* NOTE: We're using g_free here because that's what needs to
 	   happen, but you really should call watchers_remove first as well
 	   since that disconnects the signals.  We can't do that with a callback
@@ -397,6 +405,8 @@ bus_method_call (GDBusConnection * connection, const gchar * sender, const gchar
 		retval = bus_watch(service, sender);
 	} else if (g_strcmp0(method, "UnWatch") == 0) {
 		unwatch_core(service, sender);
+	} else if (g_strcmp0(method, "Shutdown") == 0) {
+		g_signal_emit(G_OBJECT(service), signals[SHUTDOWN], 0, TRUE);
 	} else {
 		g_warning("Calling method '%s' on the indicator service and it's unknown", method);
 	}
@@ -462,8 +472,33 @@ try_and_get_name_lost_cb (GDBusConnection * connection, const gchar * name, gpoi
 	g_return_if_fail(connection != NULL);
 	g_return_if_fail(INDICATOR_IS_SERVICE(user_data));
 
-	g_warning("Name request failed.");
-	g_signal_emit(G_OBJECT(user_data), signals[SHUTDOWN], 0, TRUE);
+	IndicatorServicePrivate * priv = INDICATOR_SERVICE_GET_PRIVATE(user_data);
+
+	if (!priv->replace_mode) {
+		g_warning("Name request failed.");
+		g_signal_emit(G_OBJECT(user_data), signals[SHUTDOWN], 0, TRUE);
+	} else {
+		/* If we're in replace mode we can be a little more trickey
+		   here.  We're going to tell the other guy to shutdown and hope
+		   that we get the name. */
+		GDBusMessage * message = NULL;
+		message = g_dbus_message_new_method_call(name,
+		                                         INDICATOR_SERVICE_OBJECT,
+		                                         INDICATOR_SERVICE_INTERFACE,
+		                                         "Shutdown");
+
+		g_dbus_connection_send_message(connection, message, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
+		g_object_unref(message);
+
+		/* Check to see if we need to clean up a timeout */
+		if (priv->timeout != 0) {
+			g_source_remove(priv->timeout);
+			priv->timeout = 0;
+		}
+
+		/* Set a timeout for no watchers if we can't get the name */
+		priv->timeout = g_timeout_add(priv->timeout_length * 4, timeout_no_watchers, user_data);
+	}
 
 	return;
 }
diff --git a/libindicator/indicator-service.xml b/libindicator/indicator-service.xml
index 6bd7d80..71ef4df 100644
--- a/libindicator/indicator-service.xml
+++ b/libindicator/indicator-service.xml
@@ -13,6 +13,7 @@
 		<method name="UnWatch">
 			<annotation name="org.freedesktop.DBus.GLib.Async" value="true" />
 		</method>
+		<method name="Shutdown" />
 
 <!-- Signals -->
 		<!-- None currently -->