/*
 * AT-SPI - Assistive Technology Service Provider Interface
 * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
 *
 * Copyright 2002 Ximian, Inc.
 *           2002 Sun Microsystems Inc.
 * Copyright 2010, 2011 Novell, 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 2.1 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef _ATSPI_EVENT_LISTENER_H_
#define _ATSPI_EVENT_LISTENER_H_

#include "glib-object.h"

#include "atspi-types.h"

G_BEGIN_DECLS

GType atspi_event_get_type (void);

/**
 * AtspiEventListenerCB:
 * @event: (transfer full): The event for which notification is sent.
 * @user_data: User data which is passed to the callback each time a notification takes place.
 *
 * A function prototype for callbacks via which clients are notified of AT-SPI events.
 *
 **/
typedef void (*AtspiEventListenerCB) (AtspiEvent *event,
                                      void *user_data);

/**
 * AtspiEventListenerSimpleCB:
 * @event: (transfer full): The event for which notification is sent.
 *
 * Like #AtspiEventlistenerCB, but with no user_data.
 *
 **/
typedef void (*AtspiEventListenerSimpleCB) (const AtspiEvent *event);

#define ATSPI_TYPE_EVENT_LISTENER (atspi_event_listener_get_type ())
#define ATSPI_EVENT_LISTENER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), ATSPI_TYPE_EVENT_LISTENER, AtspiEventListener))
#define ATSPI_EVENT_LISTENER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), ATSPI_TYPE_EVENT_LISTENER, AtspiEventListenerClass))
#define ATSPI_IS_EVENT_LISTENER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATSPI_TYPE_EVENT_LISTENER))
#define ATSPI_IS_EVENT_LISTENER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), ATSPI_TYPE_EVENT_LISTENER))
#define ATSPI_EVENT_LISTENER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), ATSPI_TYPE_EVENT_LISTENER, AtspiEventListenerClass))

typedef struct _AtspiEventListener AtspiEventListener;
struct _AtspiEventListener
{
  GObject parent;
  AtspiEventListenerCB callback;
  void *user_data;
  GDestroyNotify cb_destroyed;
};

typedef struct _AtspiEventListenerClass AtspiEventListenerClass;
struct _AtspiEventListenerClass
{
  GObjectClass parent_class;
};

GType atspi_event_listener_get_type (void);

AtspiEventListener *
atspi_event_listener_new (AtspiEventListenerCB callback,
                          gpointer user_data,
                          GDestroyNotify callback_destroyed);

AtspiEventListener *
atspi_event_listener_new_simple (AtspiEventListenerSimpleCB callback,
                                 GDestroyNotify callback_destroyed);

gboolean
atspi_event_listener_register (AtspiEventListener *listener,
                               const gchar *event_type,
                               GError **error);

gboolean
atspi_event_listener_register_full (AtspiEventListener *listener,
                                    const gchar *event_type,
                                    GArray *properties,
                                    GError **error);

gboolean
atspi_event_listener_register_with_app (AtspiEventListener *listener,
                                        const gchar *event_type,
                                        GArray *properties,
                                        AtspiAccessible *app,
                                        GError **error);

gboolean
atspi_event_listener_register_from_callback (AtspiEventListenerCB callback,
                                             void *user_data,
                                             GDestroyNotify callback_destroyed,
                                             const gchar *event_type,
                                             GError **error);

gboolean
atspi_event_listener_register_from_callback_full (AtspiEventListenerCB callback,
                                                  void *user_data,
                                                  GDestroyNotify callback_destroyed,
                                                  const gchar *event_type,
                                                  GArray *properties,
                                                  GError **error);

gboolean
atspi_event_listener_register_from_callback_with_app (AtspiEventListenerCB callback,
                                                      void *user_data,
                                                      GDestroyNotify callback_destroyed,
                                                      const gchar *event_type,
                                                      GArray *properties,
                                                      AtspiAccessible *app,
                                                      GError **error);

gboolean
atspi_event_listener_register_no_data (AtspiEventListenerSimpleCB callback,
                                       GDestroyNotify callback_destroyed,
                                       const gchar *event_type,
                                       GError **error);

gboolean
atspi_event_listener_deregister (AtspiEventListener *listener,
                                 const gchar *event_type,
                                 GError **error);

gboolean
atspi_event_listener_deregister_from_callback (AtspiEventListenerCB callback,
                                               void *user_data,
                                               const gchar *event_type,
                                               GError **error);

gboolean
atspi_event_listener_deregister_no_data (AtspiEventListenerSimpleCB callback,
                                         const gchar *event_type,
                                         GError **error);

G_END_DECLS

#endif /* _ATSPI_EVENT_LISTENER_H_ */