Hook up set_cursor in rootston

include/rootston/seat.h

@@ -118,6 +118,7 @@ struct roots_tablet_tool_tool {
 
 	struct roots_seat *seat;
 
+	struct wl_listener set_cursor;
 	struct wl_listener tool_destroy;
 
 	struct roots_tablet_tool *current_tablet;

include/wlr/types/wlr_tablet_v2.h

@@ -81,6 +81,7 @@ struct wlr_tablet_v2_event_cursor {
 	uint32_t serial;
 	int32_t hotspot_x;
 	int32_t hotspot_y;
+	struct wlr_seat_client *seat_client;
 };
 
 struct wlr_tablet_v2_event_feedback {

rootston/seat.c

@@ -188,6 +188,7 @@ static void handle_tablet_tool_tool_destroy(struct wl_listener *listener, void *
 	wl_list_remove(&tool->tool_link);
 
 	wl_list_remove(&tool->tool_destroy.link);
+	wl_list_remove(&tool->set_cursor.link);
 
 	free(tool);
 }
@@ -203,6 +204,23 @@ static void handle_tool_button(struct wl_listener *listener, void *data) {
 	wlr_send_tablet_v2_tablet_tool_button(roots_tool->tablet_v2_tool, event->button, event->state);
 }
 
+static void handle_tablet_tool_set_cursor(struct wl_listener *listener, void *data) {
+	struct roots_tablet_tool_tool *tool =
+		wl_container_of(listener, tool, set_cursor);
+	struct wlr_tablet_v2_event_cursor *evt = data;
+
+
+	struct wlr_seat_pointer_request_set_cursor_event event = {
+		.surface = evt->surface,
+		.hotspot_x = evt->hotspot_x,
+		.hotspot_y = evt->hotspot_y,
+		.serial = evt->serial,
+		.seat_client = evt->seat_client,
+		};
+
+	roots_cursor_handle_request_set_cursor(tool->seat->cursor, &event);
+}
+
 static void handle_tool_proximity(struct wl_listener *listener, void *data) {
 	struct roots_cursor *cursor =
 		wl_container_of(listener, cursor, tool_proximity);
@@ -221,6 +239,10 @@ static void handle_tool_proximity(struct wl_listener *listener, void *data) {
 				cursor->seat->seat, tool);
 		roots_tool->tool_destroy.notify = handle_tablet_tool_tool_destroy;
 		wl_signal_add(&tool->events.destroy, &roots_tool->tool_destroy);
+
+		roots_tool->set_cursor.notify = handle_tablet_tool_set_cursor;
+		wl_signal_add(&roots_tool->tablet_v2_tool->events.set_cursor, &roots_tool->set_cursor);
+
 		wl_list_init(&roots_tool->link);
 		wl_list_init(&roots_tool->tool_link);
 	}

types/wlr_tablet_v2.c

@@ -67,6 +67,7 @@ struct wlr_tablet_tool_client_v2 {
 	struct wl_client *client;
 	struct wl_resource *resource;
 	struct wlr_tablet_v2_tablet_tool *tool;
+	struct wlr_tablet_seat_client_v2 *seat;
 
 	uint32_t proximity_serial;
 
@@ -262,24 +263,34 @@ static void handle_wlr_tablet_destroy(struct wl_listener *listener, void *data)
 	free(tablet);
 }
 
+static const struct wlr_surface_role pointer_cursor_surface_role = {
+	.name = "wl_pointer-cursor",
+};
+
 static void handle_tablet_tool_v2_set_cursor(struct wl_client *client,
-		struct wl_resource *resource,
-		uint32_t serial,
+		struct wl_resource *resource, uint32_t serial,
 		struct wl_resource *surface_resource,
-		int32_t hotspot_x,
-		int32_t hotspot_y) {
+		int32_t hotspot_x, int32_t hotspot_y) {
 	struct wlr_tablet_tool_client_v2 *tool = wl_resource_get_user_data(resource);
 	if (!tool) {
 		return;
 	}
 
-	struct wlr_surface *surface = wlr_surface_from_resource(surface_resource);
+	struct wlr_surface *surface;
+	if (surface_resource != NULL) {
+		surface = wlr_surface_from_resource(surface_resource);
+		if (!wlr_surface_set_role(surface, &pointer_cursor_surface_role, NULL,
+				surface_resource, WL_POINTER_ERROR_ROLE)) {
+			return;
+		}
+	}
 
 	struct wlr_tablet_v2_event_cursor evt = {
 		.surface = surface,
 		.serial = serial,
 		.hotspot_x = hotspot_x,
 		.hotspot_y = hotspot_y,
+		.seat_client = tool->seat->seat,
 		};
 
 	wl_signal_emit(&tool->tool->events.set_cursor, &evt);
@@ -324,6 +335,10 @@ static void destroy_tablet_tool(struct wl_resource *resource) {
 		wl_event_source_remove(client->frame_source);
 	}
 
+	if (client->tool && client->tool->current_client == client) {
+		client->tool->current_client = NULL;
+	}
+
 	wl_list_remove(&client->seat_link);
 	wl_list_remove(&client->tool_link);
 	free(client);
@@ -337,6 +352,7 @@ static void add_tablet_tool_client(struct wlr_tablet_seat_client_v2 *seat,
 		return;
 	}
 	client->tool = tool;
+	client->seat = seat;
 
 	client->resource =
 		wl_resource_create(seat->wl_client, &zwp_tablet_tool_v2_interface, 1, 0);
@@ -444,6 +460,7 @@ static void handle_wlr_tablet_tool_destroy(struct wl_listener *listener, void *d
 	wl_list_for_each_safe(pos, tmp, &tool->clients, tool_link) {
 		// XXX: Add a timer/flag to destroy if client is slow?
 		zwp_tablet_tool_v2_send_removed(pos->resource);
+		pos->tool = NULL;
 	}
 
 	wl_list_remove(&tool->clients);