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/* ATK - Accessibility Toolkit
* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <atk/atkgobjectaccessible.h>
#include <atk/atkregistry.h>
#include <atk/atkutil.h>
/**
* SECTION:atkgobjectaccessible
* @Short_description: This object class is derived from AtkObject and
* can be used as a basis implementing accessible objects.
* @Title:AtkGObjectAccessible
*
* This object class is derived from AtkObject. It can be used as a
* basis for implementing accessible objects for GObjects which are
* not derived from GtkWidget. One example of its use is in providing
* an accessible object for GnomeCanvasItem in the GAIL library.
*/
static void atk_gobject_accessible_class_init (AtkGObjectAccessibleClass *klass);
static void atk_real_gobject_accessible_initialize (AtkObject *atk_obj,
gpointer data);
static void atk_gobject_accessible_dispose (gpointer data);
static GQuark quark_accessible_object = 0;
static GQuark quark_object = 0;
static gpointer parent_class = NULL;
GType
atk_gobject_accessible_get_type (void)
{
static GType type = 0;
if (!type)
{
static const GTypeInfo tinfo =
{
sizeof (AtkGObjectAccessibleClass),
(GBaseInitFunc) NULL, /* base init */
(GBaseFinalizeFunc) NULL, /* base finalize */
(GClassInitFunc) atk_gobject_accessible_class_init,
(GClassFinalizeFunc) NULL, /* class finalize */
NULL, /* class data */
sizeof (AtkGObjectAccessible),
0, /* nb preallocs */
(GInstanceInitFunc) NULL, /* instance init */
NULL /* value table */
};
type = g_type_register_static (ATK_TYPE_OBJECT,
"AtkGObjectAccessible", &tinfo, 0);
}
return type;
}
/**
* atk_gobject_accessible_for_object:
* @obj: a #GObject
*
* Gets the accessible object for the specified @obj.
*
* Returns: (transfer none): a #AtkObject which is the accessible object for
* the @obj
**/
AtkObject*
atk_gobject_accessible_for_object (GObject *obj)
{
AtkObject* accessible;
g_return_val_if_fail (G_IS_OBJECT (obj), NULL);
/* See if we have a cached accessible for this object */
accessible = g_object_get_qdata (obj,
quark_accessible_object);
if (!accessible)
{
AtkObjectFactory *factory;
AtkRegistry *default_registry;
default_registry = atk_get_default_registry ();
factory = atk_registry_get_factory (default_registry,
G_OBJECT_TYPE (obj));
accessible = atk_object_factory_create_accessible (factory,
obj);
if (!ATK_IS_GOBJECT_ACCESSIBLE (accessible))
{
/*
* The AtkObject which was created was not a AtkGObjectAccessible
*/
g_object_weak_ref (obj,
(GWeakNotify) g_object_unref,
accessible);
if (!quark_accessible_object)
quark_accessible_object = g_quark_from_static_string ("accessible-object");
}
g_object_set_qdata (obj, quark_accessible_object, accessible);
}
return accessible;
}
/**
* atk_gobject_accessible_get_object:
* @obj: a #AtkGObjectAccessible
*
* Gets the GObject for which @obj is the accessible object.
*
* Returns: (transfer none): a #GObject which is the object for which @obj is
* the accessible object
**/
GObject *
atk_gobject_accessible_get_object (AtkGObjectAccessible *obj)
{
g_return_val_if_fail (ATK_IS_GOBJECT_ACCESSIBLE (obj), NULL);
return g_object_get_qdata (G_OBJECT (obj), quark_object);
}
static void
atk_real_gobject_accessible_initialize (AtkObject *atk_obj,
gpointer data)
{
AtkGObjectAccessible *atk_gobj;
atk_gobj = ATK_GOBJECT_ACCESSIBLE (atk_obj);
g_object_set_qdata (G_OBJECT (atk_gobj), quark_object, data);
atk_obj->layer = ATK_LAYER_WIDGET;
g_object_weak_ref (data,
(GWeakNotify) atk_gobject_accessible_dispose,
atk_gobj);
}
static void
atk_gobject_accessible_dispose (gpointer data)
{
GObject *object;
g_return_if_fail (ATK_IS_GOBJECT_ACCESSIBLE (data));
object = atk_gobject_accessible_get_object (data);
if (object)
g_object_set_qdata (object, quark_accessible_object, NULL);
g_object_set_qdata (G_OBJECT (data), quark_object, NULL);
atk_object_notify_state_change (ATK_OBJECT (data), ATK_STATE_DEFUNCT,
TRUE);
g_object_unref (data);
}
static void
atk_gobject_accessible_class_init (AtkGObjectAccessibleClass *klass)
{
AtkObjectClass *class;
class = ATK_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
class->initialize = atk_real_gobject_accessible_initialize;
if (!quark_accessible_object)
quark_accessible_object = g_quark_from_static_string ("accessible-object");
quark_object = g_quark_from_static_string ("object-for-accessible");
}
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