[clutter/clutter-1.14] cally: Use a weak pointer to hold the key focus in CallyStage

[Emmanuele Bassi <ebassi src gnome org>]

commit a586c23ddcef9a11f6e343b4b6848cde2df54927
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon May 6 15:46:25 2013 -0700

    cally: Use a weak pointer to hold the key focus in CallyStage
    
    We want to avoid the pointer getting stale, and causing crashes.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=692706
    (cherry picked from commit 19391a9626b087bd4df452e8699d53caa54c350f)
    
    Signed-off-by: Emmanuele Bassi <ebassi gnome org>

 clutter/cally/cally-stage.c |   20 ++++++++++++++++++--
 1 files changed, 18 insertions(+), 2 deletions(-)
---
diff --git a/clutter/cally/cally-stage.c b/clutter/cally/cally-stage.c
index 2b1cfd1..c95ccb0 100644
--- a/clutter/cally/cally-stage.c
+++ b/clutter/cally/cally-stage.c
@@ -139,7 +139,11 @@ cally_stage_notify_key_focus_cb (ClutterStage *stage,
       AtkObject *old = NULL;
 
       if (self->priv->key_focus != NULL)
-        old = clutter_actor_get_accessible (self->priv->key_focus);
+        {
+          g_object_remove_weak_pointer (G_OBJECT (self->priv->key_focus),
+                                        (gpointer *) &self->priv->key_focus);
+          old = clutter_actor_get_accessible (self->priv->key_focus);
+        }
       else
         old = clutter_actor_get_accessible (CLUTTER_ACTOR (stage));
 
@@ -154,7 +158,19 @@ cally_stage_notify_key_focus_cb (ClutterStage *stage,
   self->priv->key_focus = key_focus;
 
   if (key_focus != NULL)
-    new = clutter_actor_get_accessible (key_focus);
+    {
+      /* ensure that if the key focus goes away, the field inside
+       * CallyStage is reset. see bug:
+       *
+       * https://bugzilla.gnome.org/show_bug.cgi?id=692706
+       *
+       * we remove the weak pointer above.
+       */
+      g_object_add_weak_pointer (G_OBJECT (self->priv->key_focus),
+                                 (gpointer *) &self->priv->key_focus);
+
+      new = clutter_actor_get_accessible (key_focus);
+    }
   else
     new = clutter_actor_get_accessible (CLUTTER_ACTOR (stage));