xdg-decoration: use wlr_surface_synced for toplevel

include/wlr/types/wlr_xdg_decoration_v1.h

@@ -52,12 +52,15 @@ struct wlr_xdg_toplevel_decoration_v1 {
 		struct wl_signal request_mode;
 	} events;
 
+	void *data;
+
+	// private state
+
 	struct wl_listener toplevel_destroy;
 	struct wl_listener surface_configure;
 	struct wl_listener surface_ack_configure;
-	struct wl_listener surface_commit;
 
-	void *data;
+	struct wlr_surface_synced synced;
 };
 
 struct wlr_xdg_decoration_manager_v1 *

types/wlr_xdg_decoration_v1.c

@@ -62,7 +62,7 @@ static void toplevel_decoration_handle_resource_destroy(
 	struct wlr_xdg_toplevel_decoration_v1 *decoration =
 		toplevel_decoration_from_resource(resource);
 	wl_signal_emit_mutable(&decoration->events.destroy, decoration);
-	wl_list_remove(&decoration->surface_commit.link);
+	wlr_surface_synced_finish(&decoration->synced);
 	wl_list_remove(&decoration->toplevel_destroy.link);
 	wl_list_remove(&decoration->surface_configure.link);
 	wl_list_remove(&decoration->surface_ack_configure.link);
@@ -141,13 +141,9 @@ static void toplevel_decoration_handle_surface_ack_configure(
 	free(configure);
 }
 
-static void toplevel_decoration_handle_surface_commit(
-		struct wl_listener *listener, void *data) {
-	struct wlr_xdg_toplevel_decoration_v1 *decoration =
-		wl_container_of(listener, decoration, surface_commit);
-
-	decoration->current = decoration->pending;
-}
+static const struct wlr_surface_synced_impl surface_synced_impl = {
+	.state_size = sizeof(struct wlr_xdg_toplevel_decoration_v1_state),
+};
 
 static const struct zxdg_decoration_manager_v1_interface decoration_manager_impl;
 
@@ -197,10 +193,18 @@ static void decoration_manager_handle_get_toplevel_decoration(
 	decoration->manager = manager;
 	decoration->toplevel = toplevel;
 
+	if (!wlr_surface_synced_init(&decoration->synced, toplevel->base->surface,
+			&surface_synced_impl, &decoration->pending, &decoration->current)) {
+		free(decoration);
+		wl_client_post_no_memory(client);
+		return;
+	}
+
 	uint32_t version = wl_resource_get_version(manager_resource);
 	decoration->resource = wl_resource_create(client,
 		&zxdg_toplevel_decoration_v1_interface, version, id);
 	if (decoration->resource == NULL) {
+		wlr_surface_synced_finish(&decoration->synced);
 		free(decoration);
 		wl_client_post_no_memory(client);
 		return;
@@ -222,8 +226,6 @@ static void decoration_manager_handle_get_toplevel_decoration(
 	decoration->surface_configure.notify = toplevel_decoration_handle_surface_configure;
 	wl_signal_add(&toplevel->base->events.ack_configure, &decoration->surface_ack_configure);
 	decoration->surface_ack_configure.notify = toplevel_decoration_handle_surface_ack_configure;
-	wl_signal_add(&toplevel->base->surface->events.commit, &decoration->surface_commit);
-	decoration->surface_commit.notify = toplevel_decoration_handle_surface_commit;
 
 	wl_list_insert(&manager->decorations, &decoration->link);