[gtk] a11y: Check display in `*grab_cell_focus()`

[Daniel Boles <dboles src gnome org>]

commit 58e273d0562392f1b0a19f6b733fdcf0a35acaf3
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Mon Jan 7 21:06:57 2019 +0000

    a11y: Check display in `*grab_cell_focus()`
    
    Calling the accessibility function `grab_focus()` on a `GtkCell` under
    Wayland will cause the client to crash.
    
    This is another case of `gdk_x11_get_server_time()` being called
    regardless of the actual windowing backend used.
    
    Closes: https://gitlab.gnome.org/GNOME/gtk/issues/1507

 gtk/a11y/gtktreeviewaccessible.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/gtk/a11y/gtktreeviewaccessible.c b/gtk/a11y/gtktreeviewaccessible.c
index 37339ceb14..4c9f66fe9a 100644
--- a/gtk/a11y/gtktreeviewaccessible.c
+++ b/gtk/a11y/gtktreeviewaccessible.c
@@ -1174,11 +1174,12 @@ gtk_tree_view_accessible_grab_cell_focus (GtkCellAccessibleParent *parent,
       if (gtk_widget_is_toplevel (toplevel))
         {
 #ifdef GDK_WINDOWING_X11
-          gtk_window_present_with_time (GTK_WINDOW (toplevel),
-                                        gdk_x11_get_server_time (gtk_widget_get_surface (widget)));
-#else
-          gtk_window_present (GTK_WINDOW (toplevel));
+          if (GDK_IS_X11_DISPLAY (gtk_widget_get_display (toplevel)))
+            gtk_window_present_with_time (GTK_WINDOW (toplevel),
+                                          gdk_x11_get_server_time (gtk_widget_get_surface (widget)));
+          else
 #endif
+            gtk_window_present (GTK_WINDOW (toplevel));
         }
 
       return TRUE;