1 files changed, 16 insertions, 0 deletions

diff --git a/sway/desktop/xdg_shell_v6.c b/sway/desktop/xdg_shell_v6.c
index a7838c0f..ff950c70 100644
--- a/sway/desktop/xdg_shell_v6.c
+++ b/sway/desktop/xdg_shell_v6.c
@@ -189,6 +189,21 @@ static void for_each_popup(struct sway_view *view,
                 user_data);
 }
 
+static bool is_transient_for(struct sway_view *child,
+                struct sway_view *ancestor) {
+        if (xdg_shell_v6_view_from_view(child) == NULL) {
+                return false;
+        }
+        struct wlr_xdg_surface_v6 *surface = child->wlr_xdg_surface_v6;
+        while (surface) {
+                if (surface->toplevel->parent == ancestor->wlr_xdg_surface_v6) {
+                        return true;
+                }
+                surface = surface->toplevel->parent;
+        }
+        return false;
+}
+
 static void _close(struct sway_view *view) {
         if (xdg_shell_v6_view_from_view(view) == NULL) {
                 return;
@@ -230,6 +245,7 @@ static const struct sway_view_impl view_impl = {
         .wants_floating = wants_floating,
         .for_each_surface = for_each_surface,
         .for_each_popup = for_each_popup,
+        .is_transient_for = is_transient_for,
         .close = _close,
         .close_popups = close_popups,
         .destroy = destroy,