fallback to default at required components, if wrong set by user (empty values are still possible, to disable a component).

(( note: required components are windowmanager , filemanager , panel , dock ))

Author: 2387skju

mate-session/main.c

@@ -283,7 +283,36 @@ static void append_required_apps(GsmManager* manager)
 				}
 				else
 				{
-					g_warning("Unable to find provider '%s' of required component '%s'", default_provider, component);
+					// possible reset component to default
+					const gchar *gsetting_default_default_provider;
+					const GVariant *default_default_provider;
+					default_default_provider = g_settings_get_default_value (settings_required_components, component);
+					g_variant_get (default_default_provider, "&s", &gsetting_default_default_provider);
+					g_free (default_default_provider);
+
+					if (strcmp (default_provider, "") != 0 &&
+					    strcmp (gsetting_default_default_provider, "") != 0 &&
+					    strcmp (gsetting_default_default_provider, default_provider) != 0)
+					{
+						g_warning ("Unable to find provider '%s' of required component '%s'", default_provider, component);
+						g_warning ("Reset required component '%s' to default", component);
+						g_settings_reset (settings_required_components, component);
+
+						g_free (default_provider);
+						default_provider = g_settings_get_string (settings_required_components, component);
+						if (default_provider != NULL)
+						{
+							app_path = gsm_util_find_desktop_file_for_app_name (default_provider, NULL);
+							if (app_path != NULL)
+							{
+								gsm_manager_add_autostart_app (manager, app_path, component);
+							}
+						}
+					}
+					if (app_path == NULL)
+					{
+						g_warning ("Unable to find provider '%s' of required component '%s'", default_provider, component);
+					}
 				}
 
 				g_free(app_path);