Replace seatup allows_events with button callback

include/sway/input/seat.h

@@ -9,13 +9,15 @@
 struct sway_seat;
 
 struct sway_seatop_impl {
+	void (*button)(struct sway_seat *seat, uint32_t time_msec,
+			struct wlr_input_device *device, uint32_t button,
+			enum wlr_button_state state);
 	void (*motion)(struct sway_seat *seat, uint32_t time_msec);
 	void (*finish)(struct sway_seat *seat, uint32_t time_msec);
 	void (*abort)(struct sway_seat *seat);
 	void (*unref)(struct sway_seat *seat, struct sway_container *con);
 	void (*render)(struct sway_seat *seat, struct sway_output *output,
 			pixman_region32_t *damage);
-	bool allows_events;
 };
 
 struct sway_seat_device {
@@ -214,6 +216,10 @@ void seat_consider_warp_to_focus(struct sway_seat *seat);
 
 bool seat_doing_seatop(struct sway_seat *seat);
 
+void seatop_button(struct sway_seat *seat, uint32_t time_msec,
+		struct wlr_input_device *device, uint32_t button,
+		enum wlr_button_state state);
+
 void seatop_motion(struct sway_seat *seat, uint32_t time_msec);
 
 /**
@@ -240,6 +246,4 @@ void seatop_unref(struct sway_seat *seat, struct sway_container *con);
 void seatop_render(struct sway_seat *seat, struct sway_output *output,
 		pixman_region32_t *damage);
 
-bool seatop_allows_events(struct sway_seat *seat);
-
 #endif

sway/input/cursor.c

@@ -610,9 +610,7 @@ void dispatch_cursor_button(struct sway_cursor *cursor,
 		} else {
 			state_erase_button(cursor, button);
 		}
-		if (seatop_allows_events(seat)) {
-			seat_pointer_notify_button(seat, time_msec, button, state);
-		}
+		seatop_button(seat, time_msec, device, button, state);
 		if (button == seat->seatop_button && state == WLR_BUTTON_RELEASED) {
 			seatop_finish(seat, time_msec);
 		}

sway/input/seat.c

@@ -1216,6 +1216,14 @@ void seatop_unref(struct sway_seat *seat, struct sway_container *con) {
 	}
 }
 
+void seatop_button(struct sway_seat *seat, uint32_t time_msec,
+		struct wlr_input_device *device, uint32_t button,
+		enum wlr_button_state state) {
+	if (seat->seatop_impl && seat->seatop_impl->button) {
+		seat->seatop_impl->button(seat, time_msec, device, button, state);
+	}
+}
+
 void seatop_motion(struct sway_seat *seat, uint32_t time_msec) {
 	if (seat->seatop_impl && seat->seatop_impl->motion) {
 		seat->seatop_impl->motion(seat, time_msec);
@@ -1246,7 +1254,3 @@ void seatop_render(struct sway_seat *seat, struct sway_output *output,
 		seat->seatop_impl->render(seat, output, damage);
 	}
 }
-
-bool seatop_allows_events(struct sway_seat *seat) {
-	return seat->seatop_impl && seat->seatop_impl->allows_events;
-}

sway/input/seatop_down.c

@@ -11,6 +11,12 @@ struct seatop_down_event {
 	bool moved;
 };
 
+static void handle_button(struct sway_seat *seat, uint32_t time_msec,
+		struct wlr_input_device *device, uint32_t button,
+		enum wlr_button_state state) {
+	seat_pointer_notify_button(seat, time_msec, button, state);
+}
+
 static void handle_motion(struct sway_seat *seat, uint32_t time_msec) {
 	struct seatop_down_event *e = seat->seatop_data;
 	struct sway_container *con = e->con;
@@ -54,11 +60,11 @@ static void handle_unref(struct sway_seat *seat, struct sway_container *con) {
 }
 
 static const struct sway_seatop_impl seatop_impl = {
+	.button = handle_button,
 	.motion = handle_motion,
 	.finish = handle_finish,
 	.abort = handle_abort,
 	.unref = handle_unref,
-	.allows_events = true,
 };
 
 void seatop_begin_down(struct sway_seat *seat, struct sway_container *con,