[clutter] ClutterActor: Add clutter_actor_has_contraints

[Adel Gadllah <agadllah src gnome org>]

commit e81800607cdde8522fde33e0df14686e9b972541
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Thu Sep 29 18:29:40 2011 +0200

    ClutterActor: Add clutter_actor_has_contraints
    
    Adds an efficent way to query whether an actor has any
    applied constraints.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=660471

 clutter/clutter-actor.c      |   19 +++++++++++++++++++
 clutter/clutter-constraint.h |    2 ++
 2 files changed, 21 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter-actor.c b/clutter/clutter-actor.c
index 76882f9..4af467c 100644
--- a/clutter/clutter-actor.c
+++ b/clutter/clutter-actor.c
@@ -12474,6 +12474,25 @@ clutter_actor_has_effects (ClutterActor *self)
   return _clutter_meta_group_has_metas_no_internal (self->priv->effects);
 }
 
+/**
+ * clutter_actor_has_constraints:
+ * @self: A #ClutterActor
+ *
+ * Returns whether the actor has any constraints applied.
+ *
+ * Return value: %TRUE if the actor has any constraints,
+ *   %FALSE otherwise
+ *
+ * Since: 1.10
+ */
+gboolean
+clutter_actor_has_constraints (ClutterActor *self)
+{
+  g_return_val_if_fail (CLUTTER_IS_ACTOR (self), TRUE);
+
+  return self->priv->constraints != NULL;
+}
+
 gint
 _clutter_actor_get_n_children (ClutterActor *self)
 {
diff --git a/clutter/clutter-constraint.h b/clutter/clutter-constraint.h
index 6d2eabd..777df55 100644
--- a/clutter/clutter-constraint.h
+++ b/clutter/clutter-constraint.h
@@ -101,6 +101,8 @@ ClutterConstraint *clutter_actor_get_constraint            (ClutterActor      *s
                                                             const gchar       *name);
 void               clutter_actor_clear_constraints         (ClutterActor      *self);
 
+gboolean           clutter_actor_has_constraints           (ClutterActor *self);
+
 G_END_DECLS
 
 #endif /* __CLUTTER_CONSTRAINT_H__ */