gtkwindow: Ignore implicit grabs going away if there is no focus

There should be no circumstances where an implicit grab is requested but
no focus exists, there's however circumstances (like windowing grabs taking
input to a different window) where we might get implicit grabs being undone
when then new window didn't create a focus for the pointer itself.

diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index f0e8f07125d1d4ba5a730caa2749d200880adff8..5868265f507e010f0b46b351c5ef8e9ef680dc3b 100644 (file)
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -11507,6 +11507,8 @@ gtk_window_set_pointer_focus_grab (GtkWindow        *window,
   GtkPointerFocus *focus;
 
   focus = gtk_window_lookup_pointer_focus (window, device, sequence);
+  if (!focus && !grab_widget)
+    return;
   g_assert (focus != NULL);
   gtk_pointer_focus_set_implicit_grab (focus, grab_widget);
 }