libweston-desktop: Add listener and API to drop the idle inhibitor

Listen for the drop_idle_inhibitor signal from libweston, and propagate
the call to a corresponding libweston-desktop API.

libweston-desktop/internal.h

@@ -47,6 +47,9 @@ void
 weston_desktop_api_surface_removed(struct weston_desktop *desktop,
 				   struct weston_desktop_surface *surface);
 void
+weston_desktop_api_surface_drop_idle_inhibitor(struct weston_desktop *desktop,
+					       struct weston_desktop_surface *surface);
+void
 weston_desktop_api_committed(struct weston_desktop *desktop,
 			     struct weston_desktop_surface *surface,
 			     int32_t sx, int32_t sy);

libweston-desktop/libweston-desktop.c

@@ -61,6 +61,7 @@ weston_desktop_create(struct weston_compositor *compositor,
 
 	assert(api->surface_added);
 	assert(api->surface_removed);
+	/* assert(api->surface_drop_idle_inhibitor); -- optional, for now */
 
 	desktop = zalloc(sizeof(struct weston_desktop));
 	desktop->compositor = compositor;
@@ -165,6 +166,13 @@ weston_desktop_api_surface_removed(struct weston_desktop *desktop,
 	desktop->api.surface_removed(surface, desktop->user_data);
 }
 
+void
+weston_desktop_api_surface_drop_idle_inhibitor(struct weston_desktop *desktop,
+				   struct weston_desktop_surface *surface)
+{
+	desktop->api.surface_drop_idle_inhibitor(surface, desktop->user_data);
+}
+
 void
 weston_desktop_api_committed(struct weston_desktop *desktop,
 			     struct weston_desktop_surface *surface,

libweston-desktop/libweston-desktop.h

@@ -59,6 +59,8 @@ struct weston_desktop_api {
 			      void *user_data);
 	void (*surface_removed)(struct weston_desktop_surface *surface,
 				void *user_data);
+	void (*surface_drop_idle_inhibitor)(struct weston_desktop_surface *surface,
+					    void *user_data);
 	void (*committed)(struct weston_desktop_surface *surface,
 			  int32_t sx, int32_t sy, void *user_data);
 	void (*show_window_menu)(struct weston_desktop_surface *surface,

libweston-desktop/surface.c

@@ -54,6 +54,7 @@ struct weston_desktop_surface {
 	struct weston_position buffer_move;
 	struct wl_listener surface_commit_listener;
 	struct wl_listener surface_destroy_listener;
+	struct wl_listener surface_drop_idle_inhibitor_listener;
 	struct wl_listener client_destroy_listener;
 	struct wl_list children_list;
 
@@ -130,6 +131,7 @@ weston_desktop_surface_destroy(struct weston_desktop_surface *surface)
 
 	wl_list_remove(&surface->surface_commit_listener.link);
 	wl_list_remove(&surface->surface_destroy_listener.link);
+	wl_list_remove(&surface->surface_drop_idle_inhibitor_listener.link);
 	wl_list_remove(&surface->client_destroy_listener.link);
 
 	if (!wl_list_empty(&surface->resource_list)) {
@@ -217,6 +219,20 @@ weston_desktop_surface_resource_destroy(struct wl_resource *resource)
 		weston_desktop_surface_destroy(surface);
 }
 
+static void
+weston_desktop_surface_drop_idle_inhibitor(struct wl_listener *listener,
+					   void *data)
+{
+	struct weston_desktop_surface *surface =
+		wl_container_of(listener, surface, surface_drop_idle_inhibitor_listener);
+	struct weston_desktop *desktop = surface->desktop;
+
+	printf("weston_desktop_surface_drop_idle_inhibitor\n");
+	weston_desktop_api_surface_drop_idle_inhibitor(desktop, surface);
+	// TODO: Need to call shell.c's desktop_surface_drop_idle_inhibitor
+	//shell_desktop_api.surface_drop_idle_inhibitor(surface, NULL /*data?*/);
+}
+
 static void
 weston_desktop_surface_committed(struct weston_surface *wsurface,
 				 int32_t sx, int32_t sy)
@@ -277,6 +293,10 @@ weston_desktop_surface_create(struct weston_desktop *desktop,
 		weston_desktop_surface_surface_destroyed;
 	wl_signal_add(&surface->surface->destroy_signal,
 		      &surface->surface_destroy_listener);
+	surface->surface_drop_idle_inhibitor_listener.notify =
+		weston_desktop_surface_drop_idle_inhibitor;
+	wl_signal_add(&surface->surface->drop_idle_inhibitor_signal,
+		      &surface->surface_drop_idle_inhibitor_listener);
 
 	wl_list_init(&surface->client_link);
 	wl_list_init(&surface->resource_list);