Listen to display destroy in output

include/wlr/types/wlr_output.h

@@ -74,6 +74,8 @@ struct wlr_output {
 	// the output position in layout space reported to clients
 	int32_t lx, ly;
 
+	struct wl_listener display_destroy;
+
 	void *data;
 };
 

types/wlr_output.c

@@ -112,6 +112,12 @@ static void wl_output_bind(struct wl_client *wl_client, void *data,
 	wl_output_send_to_resource(wl_resource);
 }
 
+static void handle_display_destroy(struct wl_listener *listener, void *data) {
+	struct wlr_output *output =
+		wl_container_of(listener, output, display_destroy);
+	wlr_output_destroy_global(output);
+}
+
 struct wl_global *wlr_output_create_global(struct wlr_output *wlr_output,
 		struct wl_display *display) {
 	if (wlr_output->wl_global != NULL) {
@@ -120,6 +126,10 @@ struct wl_global *wlr_output_create_global(struct wlr_output *wlr_output,
 	struct wl_global *wl_global = wl_global_create(display,
 		&wl_output_interface, 3, wlr_output, wl_output_bind);
 	wlr_output->wl_global = wl_global;
+
+	wlr_output->display_destroy.notify = handle_display_destroy;
+	wl_display_add_destroy_listener(display, &wlr_output->display_destroy);
+
 	return wl_global;
 }
 
@@ -127,6 +137,7 @@ void wlr_output_destroy_global(struct wlr_output *wlr_output) {
 	if (wlr_output->wl_global == NULL) {
 		return;
 	}
+	wl_list_remove(&wlr_output->display_destroy.link);
 	struct wl_resource *resource, *tmp;
 	wl_resource_for_each_safe(resource, tmp, &wlr_output->wl_resources) {
 		struct wl_list *link = wl_resource_get_link(resource);