xwayland: listen to `set_geometry` event

Closes #5735, refs #3007.

This makes the "Search everywhere" dialog in JetBrains IDEs movable.

include/sway/tree/view.h

@@ -174,6 +174,7 @@ struct sway_xwayland_unmanaged {
 	struct wl_listener request_configure;
 	struct wl_listener request_fullscreen;
 	struct wl_listener commit;
+	struct wl_listener set_geometry;
 	struct wl_listener map;
 	struct wl_listener unmap;
 	struct wl_listener destroy;

sway/desktop/xwayland.c

@@ -47,6 +47,15 @@ static void unmanaged_handle_commit(struct wl_listener *listener, void *data) {
 		wl_container_of(listener, surface, commit);
 	struct wlr_xwayland_surface *xsurface = surface->wlr_xwayland_surface;
 
+	desktop_damage_surface(xsurface->surface, surface->lx, surface->ly,
+		false);
+}
+
+static void unmanaged_handle_set_geometry(struct wl_listener *listener, void *data) {
+	struct sway_xwayland_unmanaged *surface =
+		wl_container_of(listener, surface, set_geometry);
+	struct wlr_xwayland_surface *xsurface = surface->wlr_xwayland_surface;
+
 	if (xsurface->x != surface->lx || xsurface->y != surface->ly) {
 		// Surface has moved
 		desktop_damage_surface(xsurface->surface, surface->lx, surface->ly,
@@ -55,9 +64,6 @@ static void unmanaged_handle_commit(struct wl_listener *listener, void *data) {
 		surface->ly = xsurface->y;
 		desktop_damage_surface(xsurface->surface, surface->lx, surface->ly,
 			true);
-	} else {
-		desktop_damage_surface(xsurface->surface, xsurface->x, xsurface->y,
-			false);
 	}
 }
 
@@ -68,6 +74,9 @@ static void unmanaged_handle_map(struct wl_listener *listener, void *data) {
 
 	wl_list_insert(root->xwayland_unmanaged.prev, &surface->link);
 
+	wl_signal_add(&xsurface->events.set_geometry, &surface->set_geometry);
+	surface->set_geometry.notify = unmanaged_handle_set_geometry;
+
 	wl_signal_add(&xsurface->surface->events.commit, &surface->commit);
 	surface->commit.notify = unmanaged_handle_commit;
 
@@ -89,6 +98,7 @@ static void unmanaged_handle_unmap(struct wl_listener *listener, void *data) {
 	struct wlr_xwayland_surface *xsurface = surface->wlr_xwayland_surface;
 	desktop_damage_surface(xsurface->surface, xsurface->x, xsurface->y, true);
 	wl_list_remove(&surface->link);
+	wl_list_remove(&surface->set_geometry.link);
 	wl_list_remove(&surface->commit.link);
 
 	struct sway_seat *seat = input_manager_current_seat();
@@ -174,7 +184,6 @@ static struct sway_xwayland_unmanaged *create_unmanaged(
 	return surface;
 }
 
-
 static struct sway_xwayland_view *xwayland_view_from_view(
 		struct sway_view *view) {
 	if (!sway_assert(view->type == SWAY_VIEW_XWAYLAND,