xdg-shell: send maximized if tiled isn't supported

wlroots doesn't do it automatically anymore.

1 files changed, 12 insertions, 5 deletions

diff --git a/sway/desktop/xdg_shell.c b/sway/desktop/xdg_shell.c
index 7c01bf16..4c59b42a 100644
--- a/sway/desktop/xdg_shell.c
+++ b/sway/desktop/xdg_shell.c
@@ -169,12 +169,19 @@ static void set_tiled(struct sway_view *view, bool tiled) {
         if (xdg_shell_view_from_view(view) == NULL) {
                 return;
         }
-        enum wlr_edges edges = WLR_EDGE_NONE;
-        if (tiled) {
-                edges = WLR_EDGE_LEFT | WLR_EDGE_RIGHT | WLR_EDGE_TOP |
-                                WLR_EDGE_BOTTOM;
+        if (wl_resource_get_version(view->wlr_xdg_toplevel->resource) >=
+                        XDG_TOPLEVEL_STATE_TILED_LEFT_SINCE_VERSION) {
+                enum wlr_edges edges = WLR_EDGE_NONE;
+                if (tiled) {
+                        edges = WLR_EDGE_LEFT | WLR_EDGE_RIGHT | WLR_EDGE_TOP |
+                                        WLR_EDGE_BOTTOM;
+                }
+                wlr_xdg_toplevel_set_tiled(view->wlr_xdg_toplevel, edges);
+        } else {
+                // The version is too low for the tiled state; configure as maximized instead
+                // to stop the client from drawing decorations outside of the toplevel geometry.
+                wlr_xdg_toplevel_set_maximized(view->wlr_xdg_toplevel, tiled);
         }
-        wlr_xdg_toplevel_set_tiled(view->wlr_xdg_toplevel, edges);
 }
 
 static void set_fullscreen(struct sway_view *view, bool fullscreen) {