view: update wlr_toplevel size on client resizes

If a floating client resizes itself, sway updates several of its
internal dimensions to match but not wlr_toplevel. This means that the
next time wlroots sends a toplevel configure event, it can have wrong
coordinates that resize the client back to its old size. To fix this,
let's just update the next scheduled width/height of the wlr_toplevel
when the view size changes. Fixes swaywm#5266.

sway/tree/view.c

@@ -931,6 +931,14 @@ void view_update_size(struct sway_view *view) {
 	con->pending.content_width = view->geometry.width;
 	con->pending.content_height = view->geometry.height;
 	container_set_geometry_from_content(con);
+
+	// Update the next scheduled width/height so correct coordinates
+	// are sent on the next toplevel configure from wlroots.
+	struct wlr_xdg_surface *xdg_surface = view->wlr_xdg_toplevel->base;
+	if (xdg_surface->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		view->wlr_xdg_toplevel->scheduled.width = view->geometry.width;
+		view->wlr_xdg_toplevel->scheduled.height = view->geometry.height;
+	}
 }
 
 void view_center_surface(struct sway_view *view) {