xdg_shell: allow views to change geometry anytime

Currently, when sway sends a configure with some geometry and the
client responds with a different geometry in a commit that acks that
configure, sway ignores the new size. Sway applies the surface
geometry it had requested to the container, not what was actually
committed, in the following transaction.

This change allows any client commit to change its surface geometry,
even if it is a response to a configure event.

Author: Ronan Pigott

sway/desktop/xdg_shell.c

@@ -284,28 +284,27 @@ static void handle_commit(struct wl_listener *listener, void *data) {
 	struct sway_view *view = &xdg_shell_view->view;
 	struct wlr_xdg_surface *xdg_surface = view->wlr_xdg_surface;
 
+	struct wlr_box new_geo;
+	wlr_xdg_surface_get_geometry(xdg_surface, &new_geo);
+	bool new_size = new_geo.width != view->geometry.width ||
+			new_geo.height != view->geometry.height ||
+			new_geo.x != view->geometry.x ||
+			new_geo.y != view->geometry.y;
+
+	if (new_size) {
+		// The view has unexpectedly sent a new size
+		desktop_damage_view(view);
+		view_update_size(view, new_geo.width, new_geo.height);
+		memcpy(&view->geometry, &new_geo, sizeof(struct wlr_box));
+		desktop_damage_view(view);
+		transaction_commit_dirty();
+	}
+
 	if (view->container->node.instruction) {
-		wlr_xdg_surface_get_geometry(xdg_surface, &view->geometry);
 		transaction_notify_view_ready_by_serial(view,
 				xdg_surface->configure_serial);
-	} else {
-		struct wlr_box new_geo;
-		wlr_xdg_surface_get_geometry(xdg_surface, &new_geo);
-
-		if ((new_geo.width != view->geometry.width ||
-					new_geo.height != view->geometry.height ||
-					new_geo.x != view->geometry.x ||
-					new_geo.y != view->geometry.y)) {
-			// The view has unexpectedly sent a new size
-			desktop_damage_view(view);
-			view_update_size(view, new_geo.width, new_geo.height);
-			memcpy(&view->geometry, &new_geo, sizeof(struct wlr_box));
-			desktop_damage_view(view);
-			transaction_commit_dirty();
-			transaction_notify_view_ready_immediately(view);
-		} else {
-			memcpy(&view->geometry, &new_geo, sizeof(struct wlr_box));
-		}
+	} else if (new_size) {
+		transaction_notify_view_ready_immediately(view);
 	}
 
 	view_damage_from(view);