[clutter] actor: Expand is_in_clone_paint() check

[Emmanuele Bassi <ebassi src gnome org>]

commit c867e9d941c08b3ef8de722784a4d013ef92bb59
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Feb 23 16:08:52 2016 +0000

    actor: Expand is_in_clone_paint() check
    
    The function should return true not only if the actor is being painted
    by a ClutterClone, but also if it's inside a sub-graph being painted by
    a ClutterClone.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756371

 clutter/clutter-actor.c |   22 +++++++++++++++++++++-
 1 files changed, 21 insertions(+), 1 deletions(-)
---
diff --git a/clutter/clutter-actor.c b/clutter/clutter-actor.c
index 6298b1c..d966e40 100644
--- a/clutter/clutter-actor.c
+++ b/clutter/clutter-actor.c
@@ -16376,9 +16376,29 @@ _clutter_actor_set_in_clone_paint (ClutterActor *self,
 gboolean
 clutter_actor_is_in_clone_paint (ClutterActor *self)
 {
+  ClutterActor *parent;
+
   g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
 
-  return self->priv->in_clone_paint;
+  if (self->priv->in_clone_paint)
+    return TRUE;
+
+  if (self->priv->in_cloned_branch == 0)
+    return FALSE;
+
+  parent = self->priv->parent;
+  while (parent != NULL)
+    {
+      if (parent->priv->in_cloned_branch == 0)
+        break;
+
+      if (parent->priv->in_clone_paint)
+        return TRUE;
+
+      parent = parent->priv->parent;
+    }
+
+  return FALSE;
 }
 
 static gboolean