rootston: damage tracking for drag icons

include/rootston/seat.h

@@ -17,12 +17,15 @@ struct roots_seat {
 	struct wl_list views; // roots_seat_view::link
 	bool has_focus;
 
+	struct wl_list drag_icons; // roots_drag_icon::link
+
 	struct wl_list keyboards;
 	struct wl_list pointers;
 	struct wl_list touch;
 	struct wl_list tablet_tools;
 
-	struct wl_listener seat_destroy;
+	struct wl_listener new_drag_icon;
+	struct wl_listener destroy;
 };
 
 struct roots_seat_view {
@@ -33,6 +36,16 @@ struct roots_seat_view {
 	struct wl_listener view_destroy;
 };
 
+struct roots_drag_icon {
+	struct roots_seat *seat;
+	struct wlr_drag_icon *wlr_drag_icon;
+	struct wl_list link;
+
+	struct wl_listener surface_commit;
+	struct wl_listener map;
+	struct wl_listener destroy;
+};
+
 struct roots_pointer {
 	struct roots_seat *seat;
 	struct wlr_input_device *device;

include/wlr/types/wlr_data_device.h

@@ -71,10 +71,10 @@ struct wlr_drag_icon {
 	bool is_pointer;
 	int32_t touch_id;
 
-	int32_t sx;
-	int32_t sy;
+	int32_t sx, sy;
 
 	struct {
+		struct wl_signal map; // emitted when mapped or unmapped
 		struct wl_signal destroy;
 	} events;
 

include/wlr/types/wlr_seat.h

@@ -209,6 +209,8 @@ struct wlr_seat {
 		struct wl_signal selection;
 		struct wl_signal primary_selection;
 
+		struct wl_signal new_drag_icon;
+
 		struct wl_signal destroy;
 	} events;
 

rootston/seat.c

@@ -245,12 +245,33 @@ static void roots_seat_init_cursor(struct roots_seat *seat) {
 	seat->cursor->request_set_cursor.notify = handle_request_set_cursor;
 }
 
+static void roots_seat_handle_new_drag_icon(struct wl_listener *listener,
+		void *data) {
+	struct roots_seat *seat = wl_container_of(listener, seat, new_drag_icon);
+	struct wlr_drag_icon *wlr_drag_icon = data;
+
+	struct roots_drag_icon *icon = calloc(1, sizeof(struct roots_drag_icon));
+	if (icon == NULL) {
+		return;
+	}
+	icon->seat = seat;
+	icon->wlr_drag_icon = wlr_drag_icon;
+
+	icon->surface_commit.notify = roots_drag_icon_handle_surface_commit;
+	wl_signal_add(&wlr_drag_icon->events.surface_commit, &icon->surface_commit);
+	icon->map.notify = roots_drag_icon_handle_map;
+	wl_signal_add(&wlr_drag_icon->events.map, &icon->map);
+	icon->destroy.notify = roots_drag_icon_handle_destroy;
+	wl_signal_add(&wlr_drag_icon->events.destroy, &icon->destroy);
+
+	wl_list_insert(&seat->drag_icons, &icon->link);
+}
+
 static void seat_view_destroy(struct roots_seat_view *seat_view);
 
-static void roots_seat_handle_seat_destroy(struct wl_listener *listener,
+static void roots_seat_handle_destroy(struct wl_listener *listener,
 		void *data) {
-	struct roots_seat *seat =
-		wl_container_of(listener, seat, seat_destroy);
+	struct roots_seat *seat = wl_container_of(listener, seat, destroy);
 
 	// TODO: probably more to be freed here
 	wl_list_remove(&seat->seat_destroy.link);
@@ -262,7 +283,7 @@ static void roots_seat_handle_seat_destroy(struct wl_listener *listener,
 }
 
 void roots_seat_destroy(struct roots_seat *seat) {
-	roots_seat_handle_seat_destroy(&seat->seat_destroy, seat->seat);
+	roots_seat_handle_destroy(&seat->destroy, seat->seat);
 	wlr_seat_destroy(seat->seat);
 }
 
@@ -277,6 +298,7 @@ struct roots_seat *roots_seat_create(struct roots_input *input, char *name) {
 	wl_list_init(&seat->touch);
 	wl_list_init(&seat->tablet_tools);
 	wl_list_init(&seat->views);
+	wl_list_init(&seat->drag_icons);
 
 	seat->input = input;
 
@@ -295,8 +317,10 @@ struct roots_seat *roots_seat_create(struct roots_input *input, char *name) {
 
 	wl_list_insert(&input->seats, &seat->link);
 
-	seat->seat_destroy.notify = roots_seat_handle_seat_destroy;
-	wl_signal_add(&seat->seat->events.destroy, &seat->seat_destroy);
+	seat->new_drag_icon.notify = roots_seat_handle_new_drag_icon;
+	wl_signal_add(&seat->seat->events.new_drag_icon, &seat->new_drag_icon);
+	seat->destroy.notify = roots_seat_handle_seat_destroy;
+	wl_signal_add(&seat->seat->events.destroy, &seat->destroy);
 
 	return seat;
 }

types/wlr_data_device.c

@@ -454,6 +454,7 @@ static void wlr_drag_end(struct wlr_drag *drag) {
 		if (drag->icon) {
 			drag->icon->mapped = false;
 			wl_list_remove(&drag->icon_destroy.link);
+			wl_signal_emit(&drag->icon->events.map, drag->icon);
 		}
 
 		free(drag);
@@ -673,8 +674,8 @@ static struct wlr_drag_icon *wlr_drag_icon_create(
 	icon->is_pointer = is_pointer;
 	icon->touch_id = touch_id;
 	icon->mapped = true;
-	wl_list_insert(&client->seat->drag_icons, &icon->link);
 
+	wl_signal_init(&icon->events.map);
 	wl_signal_init(&icon->events.destroy);
 
 	wl_signal_add(&icon->surface->events.destroy, &icon->surface_destroy);
@@ -686,6 +687,9 @@ static struct wlr_drag_icon *wlr_drag_icon_create(
 	wl_signal_add(&client->events.destroy, &icon->seat_client_destroy);
 	icon->seat_client_destroy.notify = handle_drag_icon_seat_client_destroy;
 
+	wl_list_insert(&client->seat->drag_icons, &icon->link);
+	wl_signal_emit(&client->seat->events.new_drag_icon, icon);
+
 	return icon;
 }
 

types/wlr_seat.c

@@ -454,7 +454,10 @@ struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name) {
 	wl_list_init(&wlr_seat->clients);
 	wl_list_init(&wlr_seat->drag_icons);
 
+	wl_signal_init(&wlr_seat->events.new_drag_icon);
+
 	wl_signal_init(&wlr_seat->events.request_set_cursor);
+
 	wl_signal_init(&wlr_seat->events.selection);
 	wl_signal_init(&wlr_seat->events.primary_selection);