Add support for touch frame events

Update for the breaking change in [1].

[1]: https://github.com/swaywm/wlroots/pull/3001

include/sway/input/cursor.h

@@ -52,6 +52,7 @@ struct sway_cursor {
 	struct wl_listener touch_down;
 	struct wl_listener touch_up;
 	struct wl_listener touch_motion;
+	struct wl_listener touch_frame;
 	bool simulating_pointer_from_touch;
 	int32_t pointer_touch_id;
 

sway/input/cursor.c

@@ -495,7 +495,6 @@ static void handle_touch_down(struct wl_listener *listener, void *data) {
 		pointer_motion(cursor, event->time_msec, event->device, dx, dy, dx, dy);
 		dispatch_cursor_button(cursor, event->device, event->time_msec,
 				BTN_LEFT, WLR_BUTTON_PRESSED);
-		wlr_seat_pointer_notify_frame(wlr_seat);
 	}
 }
 
@@ -511,7 +510,6 @@ static void handle_touch_up(struct wl_listener *listener, void *data) {
 			cursor->simulating_pointer_from_touch = false;
 			dispatch_cursor_button(cursor, event->device, event->time_msec,
 					BTN_LEFT, WLR_BUTTON_RELEASED);
-			wlr_seat_pointer_notify_frame(wlr_seat);
 		}
 	} else {
 		wlr_seat_touch_notify_up(wlr_seat, event->time_msec, event->touch_id);
@@ -559,6 +557,19 @@ static void handle_touch_motion(struct wl_listener *listener, void *data) {
 	}
 }
 
+static void handle_touch_frame(struct wl_listener *listener, void *data) {
+	struct sway_cursor *cursor =
+		wl_container_of(listener, cursor, touch_frame);
+
+	struct wlr_seat *wlr_seat = cursor->seat->wlr_seat;
+
+	if (cursor->simulating_pointer_from_touch) {
+		wlr_seat_pointer_notify_frame(wlr_seat);
+	} else {
+		wlr_seat_touch_notify_frame(wlr_seat);
+	}
+}
+
 static double apply_mapping_from_coord(double low, double high, double value) {
 	if (isnan(value)) {
 		return value;
@@ -1044,6 +1055,7 @@ void sway_cursor_destroy(struct sway_cursor *cursor) {
 	wl_list_remove(&cursor->touch_down.link);
 	wl_list_remove(&cursor->touch_up.link);
 	wl_list_remove(&cursor->touch_motion.link);
+	wl_list_remove(&cursor->touch_frame.link);
 	wl_list_remove(&cursor->tool_axis.link);
 	wl_list_remove(&cursor->tool_tip.link);
 	wl_list_remove(&cursor->tool_button.link);
@@ -1119,6 +1131,9 @@ struct sway_cursor *sway_cursor_create(struct sway_seat *seat) {
 		&cursor->touch_motion);
 	cursor->touch_motion.notify = handle_touch_motion;
 
+	wl_signal_add(&wlr_cursor->events.touch_frame, &cursor->touch_frame);
+	cursor->touch_frame.notify = handle_touch_frame;
+
 	wl_signal_add(&wlr_cursor->events.tablet_tool_axis,
 		&cursor->tool_axis);
 	cursor->tool_axis.notify = handle_tool_axis;