wlr_compositor: add signal for create_surface

include/wlr/types/wlr_compositor.h

@@ -9,6 +9,8 @@ struct wlr_compositor {
 	struct wlr_renderer *renderer;
 	struct wl_list surfaces;
 	struct wl_listener destroy_surface_listener;
+
+	struct wl_signal create_surface_signal;
 };
 
 void wlr_compositor_destroy(struct wlr_compositor *wlr_compositor);

types/wlr_compositor.c

@@ -22,6 +22,7 @@ static void wl_compositor_create_surface(struct wl_client *client,
 	wl_resource_add_destroy_listener(surface_resource, &surface->compositor_listener);
 
 	wl_list_insert(&compositor->surfaces, wl_resource_get_link(surface_resource));
+	wl_signal_emit(&compositor->create_surface_signal, surface);
 }
 
 static void wl_compositor_create_region(struct wl_client *client,
@@ -80,5 +81,6 @@ struct wlr_compositor *wlr_compositor_create(struct wl_display *display,
 	compositor->renderer = renderer;
 	wl_list_init(&compositor->wl_resources);
 	wl_list_init(&compositor->surfaces);
+	wl_signal_init(&compositor->create_surface_signal);
 	return compositor;
 }

xwayland/xwm.c

@@ -62,8 +62,8 @@ struct wlr_xwm *xwm_create(struct wlr_xwayland *wlr_xwayland) {
 
 
 	xwm->surface_listener.notify = create_surface_handler;
-	//wl_signal_add(&wlr_xwayland->compositor->create_surface_signal,
+	wl_signal_add(&wlr_xwayland->compositor->create_surface_signal,
-	//		&xwm->surface_listener);
+			&xwm->surface_listener);
 
 	return xwm;
 }