From becd1a9c8734950ca438463ad792c177acd5166b Mon Sep 17 00:00:00 2001
From: Robert Carr <racarr@canonical.com>
Date: Wed, 30 Nov 2011 00:25:29 +0100
Subject: [PATCH] Do not allow devices in an offscreen hierarchy to take grabs.

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=658563
Bug-Ubuntu: https://launchpad.net/bugs/804009
Forwarded: yes

Gbp-Pq: Name 017_no_offscreen_device_grabbing.patch
---
 gtk/gtkmain.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gtk/gtkmain.c b/gtk/gtkmain.c
index 61d15e8520..3ee7a80503 100644
--- a/gtk/gtkmain.c
+++ b/gtk/gtkmain.c
@@ -2321,9 +2321,14 @@ gtk_device_grab_add (GtkWidget *widget,
 {
   GtkWindowGroup *group;
   GtkWidget *old_grab_widget;
+  GdkWindow *toplevel;
 
   g_return_if_fail (GTK_IS_WIDGET (widget));
   g_return_if_fail (GDK_IS_DEVICE (device));
+  
+  toplevel = gdk_window_get_toplevel (gtk_widget_get_window (widget));
+  if (toplevel && gdk_window_get_window_type (toplevel) == GDK_WINDOW_OFFSCREEN)
+    return;
 
   group = gtk_main_get_window_group (widget);
   old_grab_widget = gtk_window_group_get_current_device_grab (group, device);
-- 
2.30.2