[at-spi2-atk] Aggressively filtering AddChildren with STATE_MANAGES_DESCENDANTS

[Alejandro Piñeiro Iglesias <apinheiro src gnome org>]

commit c8cda37e28307ad195996ad54b9ee1680cca3ec3
Author: Alejandro Piñeiro <apinheiro igalia com>
Date:   Wed Sep 24 19:40:51 2014 +0200

    Aggressively filtering AddChildren with STATE_MANAGES_DESCENDANTS

 atk-adaptor/event.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/atk-adaptor/event.c b/atk-adaptor/event.c
index 42d359d..dbfa9dc 100644
--- a/atk-adaptor/event.c
+++ b/atk-adaptor/event.c
@@ -1067,11 +1067,22 @@ children_changed_event_listener (GSignalInvocationHint * signal_hint,
 
   AtkObject *accessible, *ao=NULL;
   gpointer child;
+  AtkStateSet *set;
+  gboolean ret;
 
   g_signal_query (signal_hint->signal_id, &signal_query);
   name = signal_query.signal_name;
 
+  /* If the accessible is on STATE_MANAGES_DESCENDANTS state,
+     children-changed signal are not forwarded. */
   accessible = ATK_OBJECT (g_value_get_object (&param_values[0]));
+  set = atk_object_ref_state_set (accessible);
+  ret = atk_state_set_contains_state (set, ATK_STATE_MANAGES_DESCENDANTS);
+  g_object_unref (set);
+
+  if (ret)
+    return TRUE;
+
   minor = g_quark_to_string (signal_hint->detail);
 
   detail1 = g_value_get_uint (param_values + 1);