2003-06-26 Padraig O'Briain <padraig.obriain@sun.com>

[platform/core/uifw/at-spi2-atk.git] / atk-bridge / bridge.c

diff --git a/atk-bridge/bridge.c b/atk-bridge/bridge.c
index e5266a0..1d3c732 100644 (file)
--- a/atk-bridge/bridge.c
+++ b/atk-bridge/bridge.c
@@ -48,7 +48,7 @@ static Accessibility_DeviceEventController device_event_controller = CORBA_OBJEC
 static SpiApplication *this_app = NULL;
 static gboolean registry_died = FALSE;
 static gboolean atk_listeners_registered = FALSE;
-static guint toplevel_handler;
+static gint toplevels = 0;
 
 static guint atk_signal_text_changed;
 static guint atk_signal_children_changed;
@@ -71,9 +71,13 @@ static void     spi_atk_bridge_do_registration         (void);
 static void     spi_atk_bridge_toplevel_added          (AtkObject             *object,
                                                         guint                 index,
                                                         AtkObject             *child);
+static void     spi_atk_bridge_toplevel_removed        (AtkObject             *object,
+                                                        guint                 index,
+                                                        AtkObject             *child);
 
 static void     spi_atk_bridge_exit_func               (void);
 static void     spi_atk_register_event_listeners       (void);
+static void     spi_atk_deregister_event_listeners     (void);
 static void     spi_atk_bridge_focus_tracker           (AtkObject             *object);
 static void     spi_atk_bridge_register_application    (Accessibility_Registry registry);
 static gboolean spi_atk_bridge_property_event_listener (GSignalInvocationHint *signal_hint,
@@ -96,6 +100,9 @@ static gboolean spi_atk_bridge_signal_listener         (GSignalInvocationHint *s
                                                        gpointer               data);
 static gint     spi_atk_bridge_key_listener            (AtkKeyEventStruct     *event,
                                                        gpointer               data);
+static void     spi_atk_tidy_windows                   (void);
+static void     deregister_application                 (BonoboObject          *app);
+static void     reinit_register_vars                   (void);
 
 /* For automatic libgnome init */
 extern void gnome_accessibility_module_init     (void);
@@ -116,6 +123,11 @@ extern void gnome_accessibility_module_shutdown (void);
 static void
 spi_atk_bridge_init_event_type_consts ()
 {
+  static gboolean done = FALSE;
+
+  if (done)
+    return;
+
   atk_signal_children_changed = g_signal_lookup ("children_changed", 
                                              ATK_TYPE_OBJECT);
   atk_signal_text_changed = g_signal_lookup ("text_changed", 
@@ -127,6 +139,7 @@ spi_atk_bridge_init_event_type_consts ()
                                              ATK_TYPE_HYPERTEXT);
   atk_signal_text_selection_changed = g_signal_lookup ("text_selection_changed", 
                                              ATK_TYPE_TEXT);
+  done = TRUE;
 }
 
 static int
@@ -157,18 +170,21 @@ atk_bridge_init (gint *argc, gchar **argv[])
   if (bonobo_activation_iid_get ())
     {
       DBG (1, g_message ("Found Bonobo component\n"));
-      toplevel_handler = g_signal_connect (atk_get_root (), 
-                                           "children-changed::add",
-                                           (GCallback) spi_atk_bridge_toplevel_added, 
-                                           NULL);
+      g_signal_connect (atk_get_root (), 
+                        "children-changed::add",
+                        (GCallback) spi_atk_bridge_toplevel_added, 
+                        NULL);
+      g_signal_connect (atk_get_root (), 
+                        "children-changed::remove",
+                        (GCallback) spi_atk_bridge_toplevel_removed, 
+                        NULL);
     }
   else
     {
       spi_atk_bridge_do_registration ();
+      spi_atk_bridge_init_event_type_consts ();
     }
  
-  spi_atk_bridge_init_event_type_consts ();
-
   return 0;
 }
 
@@ -206,8 +222,33 @@ spi_atk_bridge_toplevel_added (AtkObject *object,
                                guint     index,
                                AtkObject *child)
 {
-  g_signal_handler_disconnect (object, toplevel_handler);
-  spi_atk_bridge_do_registration ();
+  if (toplevels == 0)
+    {
+      spi_atk_bridge_do_registration ();
+      spi_atk_bridge_init_event_type_consts ();
+    }
+  toplevels++;
+}
+
+static void
+spi_atk_bridge_toplevel_removed (AtkObject *object,
+                                 guint     index,
+                                 AtkObject *child)
+{
+  BonoboObject *app = (BonoboObject *) this_app;
+
+  toplevels--;
+  if (toplevels == 0)
+    {
+      deregister_application (app);
+      spi_atk_deregister_event_listeners ();
+      reinit_register_vars ();
+    }
+  if (toplevels < 0)
+    {
+      g_warning ("More toplevels removed than added\n");
+      toplevels = 0;
+    }
 }
 
 static void
@@ -224,7 +265,7 @@ spi_atk_bridge_get_registry (void)
 {
   CORBA_Environment ev;
 
-  if (registry_died || (registry == NULL)) {
+  if (registry_died || (registry == CORBA_OBJECT_NIL)) {
          CORBA_exception_init (&ev);
          if (registry_died) 
            DBG (1, g_warning ("registry died! restarting..."));
@@ -371,6 +412,32 @@ spi_atk_register_event_listeners (void)
 }
 
 static void
+spi_atk_deregister_event_listeners (void)
+{
+  gint i;
+  guint id;
+
+  if (!atk_listeners_registered)
+    return;
+
+  atk_listeners_registered = FALSE;
+
+  for (i = 0; i < listener_ids->len; i++)
+    {
+      id = g_array_index (listener_ids, guint, i);
+      atk_remove_global_event_listener (id);   
+    }
+  g_array_free (listener_ids, TRUE);
+  listener_ids = NULL;
+
+  atk_remove_focus_tracker (atk_bridge_focus_tracker_id);
+  atk_bridge_focus_tracker_id = 0;
+
+  atk_remove_key_event_listener (atk_bridge_key_event_listener_id);
+  atk_bridge_key_event_listener_id = 0;
+}
+
+static void
 deregister_application (BonoboObject *app)
 {
   Accessibility_Registry registry = spi_atk_bridge_get_registry ();    
@@ -396,6 +463,10 @@ spi_atk_bridge_exit_func (void)
   this_app = NULL;
 
   /*
+   * Check whether we still have windows which have not been deleted.
+   */
+  spi_atk_tidy_windows ();
+  /*
    *  FIXME: this may be incorrect for apps that do their own bonobo
    *  shutdown, until we can explicitly shutdown to get the ordering
    *  right.
@@ -947,3 +1018,44 @@ spi_atk_bridge_window_event_listener (GSignalInvocationHint *signal_hint,
                       "window:%s", name);
   return TRUE;
 }
+
+static void
+spi_atk_tidy_windows (void)
+{
+  AtkObject *root;
+  gint n_children;
+  gint i;
+
+  root = atk_get_root ();
+  n_children = atk_object_get_n_accessible_children (root);
+  for (i = 0; i < n_children; i++)
+    {
+      AtkObject *child;
+      AtkStateSet *stateset;
+      CORBA_any any;
+      const gchar *name;
+     
+      child = atk_object_ref_accessible_child (root, i);
+      stateset = atk_object_ref_state_set (child);
+      
+      name = atk_object_get_name (child);
+      spi_init_any_string (&any, (char**) &name);
+      if (atk_state_set_contains_state (stateset, ATK_STATE_ACTIVE))
+        {
+          spi_atk_emit_eventv (G_OBJECT (child), 0, 0, &any, "window:deactivate");
+        }
+      g_free (stateset);
+
+      spi_atk_emit_eventv (G_OBJECT (child), 0, 0, &any, "window:destroy");
+      g_object_unref (child);
+    }
+}
+
+static void
+reinit_register_vars (void)
+{
+  registry = CORBA_OBJECT_NIL;
+  device_event_controller = CORBA_OBJECT_NIL;
+  this_app = NULL;
+}
+