[at-spi2-atk] BGO#652858: Deregister objects on state-changed::defunct

[Mike Gorse <mgorse src gnome org>]

commit c72a4b4b0330733b2c2e0ed768d76ff85cd31500
Author: Mike Gorse <mgorse novell com>
Date:   Thu Jun 23 16:02:49 2011 -0500

    BGO#652858: Deregister objects on state-changed::defunct
    
    When a state-change:defunct is received, remove the object from the
    dbus-path-to-object-mapping hash.  Also, avoid enumerating an object's
    children in a call to GetItems if the object is marked defunct.  This
    should mostly shield the ATK implementation from being called on objects
    that have been marked defunct.
    
    Also removed a seemingly unnecessary g_strdup/g_free pair.

 atk-adaptor/accessible-cache.c       |    3 ++-
 atk-adaptor/accessible-register.c    |    7 +++++++
 atk-adaptor/accessible-register.h    |    3 +++
 atk-adaptor/adaptors/cache-adaptor.c |    3 ++-
 atk-adaptor/event.c                  |    9 ++++-----
 5 files changed, 18 insertions(+), 7 deletions(-)
---
diff --git a/atk-adaptor/accessible-cache.c b/atk-adaptor/accessible-cache.c
index 79a369f..ad39819 100644
--- a/atk-adaptor/accessible-cache.c
+++ b/atk-adaptor/accessible-cache.c
@@ -275,7 +275,8 @@ add_pending_items (gpointer data)
         {
 	  g_queue_push_tail (to_add, current);
           if (!spi_cache_in (cache, G_OBJECT (current)) &&
-              !atk_state_set_contains_state  (set, ATK_STATE_MANAGES_DESCENDANTS))
+              !atk_state_set_contains_state  (set, ATK_STATE_MANAGES_DESCENDANTS) &&
+              !atk_state_set_contains_state  (set, ATK_STATE_DEFUNCT))
             {
               append_children (current, cache->add_traversal);
             }
diff --git a/atk-adaptor/accessible-register.c b/atk-adaptor/accessible-register.c
index 99d98f3..83c1c6d 100644
--- a/atk-adaptor/accessible-register.c
+++ b/atk-adaptor/accessible-register.c
@@ -190,6 +190,13 @@ static void
 deregister_object (gpointer data, GObject * gobj)
 {
   SpiRegister *reg = SPI_REGISTER (data);
+
+  spi_register_deregister_object (reg, gobj);
+}
+
+void
+spi_register_deregister_object (SpiRegister *reg, GObject *gobj)
+{
   guint ref;
 
   ref = object_to_ref (gobj);
diff --git a/atk-adaptor/accessible-register.h b/atk-adaptor/accessible-register.h
index 9a65f2a..edbe3c2 100644
--- a/atk-adaptor/accessible-register.h
+++ b/atk-adaptor/accessible-register.h
@@ -72,6 +72,9 @@ spi_register_object_to_ref (GObject * gobj);
 gchar *
 spi_register_root_object_path ();
 
+void
+spi_register_deregister_object (SpiRegister *reg, GObject *gobj);
+
 /*---------------------------------------------------------------------------*/
 
 #endif /* ACCESSIBLE_REGISTER_H */
diff --git a/atk-adaptor/adaptors/cache-adaptor.c b/atk-adaptor/adaptors/cache-adaptor.c
index 0aff2bd..1f33ce3 100644
--- a/atk-adaptor/adaptors/cache-adaptor.c
+++ b/atk-adaptor/adaptors/cache-adaptor.c
@@ -145,7 +145,8 @@ append_cache_item (AtkObject * obj, gpointer data)
     /* Marshall children */
     dbus_message_iter_open_container (&iter_struct, DBUS_TYPE_ARRAY, "(so)",
                                       &iter_sub_array);
-    if (!atk_state_set_contains_state (set, ATK_STATE_MANAGES_DESCENDANTS))
+    if (!atk_state_set_contains_state (set, ATK_STATE_MANAGES_DESCENDANTS) &&
+        !atk_state_set_contains_state (set, ATK_STATE_DEFUNCT))
       {
         gint childcount, i;
 
diff --git a/atk-adaptor/event.c b/atk-adaptor/event.c
index e882edf..99c2041 100644
--- a/atk-adaptor/event.c
+++ b/atk-adaptor/event.c
@@ -606,15 +606,14 @@ state_event_listener (GSignalInvocationHint * signal_hint,
   guint detail1;
 
   accessible = ATK_OBJECT (g_value_get_object (&param_values[0]));
-  pname = g_strdup (g_value_get_string (&param_values[1]));
+  pname = g_value_get_string (&param_values[1]);
 
-  /* TODO - Possibly ignore a change to the 'defunct' state.
-   * This is because without reference counting defunct objects should be removed.
-   */
   detail1 = (g_value_get_boolean (&param_values[2])) ? 1 : 0;
   emit_event (accessible, ITF_EVENT_OBJECT, STATE_CHANGED, pname, detail1, 0,
               DBUS_TYPE_INT32_AS_STRING, 0, append_basic);
-  g_free (pname);
+
+  if (!g_strcmp0 (pname, "defunct"))
+    spi_register_deregister_object (spi_global_register, G_OBJECT (accessible));
   return TRUE;
 }