allow pointer_constraints on layer_shell surfaces

include/sway/input/seat.h

@@ -192,6 +192,8 @@ void seat_set_exclusive_client(struct sway_seat *seat,
 
 struct sway_node *seat_get_focus(struct sway_seat *seat);
 
+struct wlr_surface *seat_get_focused_surface(struct sway_seat *seat);
+
 struct sway_workspace *seat_get_focused_workspace(struct sway_seat *seat);
 
 // If a scratchpad container is fullscreen global, this can be used to try to

sway/input/cursor.c

@@ -1372,14 +1372,11 @@ void handle_pointer_constraint(struct wl_listener *listener, void *data) {
 	sway_constraint->destroy.notify = handle_constraint_destroy;
 	wl_signal_add(&constraint->events.destroy, &sway_constraint->destroy);
 
-	struct sway_node *focus = seat_get_focus(seat);
-	if (focus && node_is_view(focus)) {
-		struct wlr_surface *surface = focus->sway_container->view->surface;
+	struct wlr_surface *surface = seat_get_focused_surface(seat);
 	if (surface == constraint->surface) {
 		sway_cursor_constrain(seat->cursor, constraint);
 	}
 }
-}
 
 void sway_cursor_constrain(struct sway_cursor *cursor,
 		struct wlr_pointer_constraint_v1 *constraint) {

sway/input/seat.c

@@ -1462,6 +1462,18 @@ struct sway_node *seat_get_focus(struct sway_seat *seat) {
 	return current->node;
 }
 
+struct wlr_surface *seat_get_focused_surface(struct sway_seat *seat) {
+	struct sway_node *focus = seat_get_focus(seat);
+	if (focus && node_is_view(focus)) {
+		return focus->sway_container->view->surface;
+	}
+	struct sway_seat_node *current = wl_container_of(seat->focus_stack.next, current, link);
+	struct wlr_layer_surface_v1 *layer = current->seat->focused_layer;
+	if (layer && layer->surface)
+		return layer->surface;
+	return NULL;
+}
+
 struct sway_workspace *seat_get_focused_workspace(struct sway_seat *seat) {
 	struct sway_node *focus = seat_get_focus_inactive(seat, &root->node);
 	if (!focus) {