/*
 * peas-activatable.h
 * This file is part of libpeas
 *
 * Copyright (C) 2010 - Steve Frécinaux
 *
 * libpeas 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.
 *
 * libpeas 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 St, Fifth Floor, Boston, MA  02110-1301  USA.
 */

#ifndef __PEAS_ACTIVATABLE_H__
#define __PEAS_ACTIVATABLE_H__

#include <glib-object.h>

G_BEGIN_DECLS

/*
 * Type checking and casting macros
 */
#define PEAS_TYPE_ACTIVATABLE             (peas_activatable_get_type ())
#define PEAS_ACTIVATABLE(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), PEAS_TYPE_ACTIVATABLE, PeasActivatable))
#define PEAS_ACTIVATABLE_IFACE(obj)       (G_TYPE_CHECK_CLASS_CAST ((obj), PEAS_TYPE_ACTIVATABLE, PeasActivatableInterface))
#define PEAS_IS_ACTIVATABLE(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), PEAS_TYPE_ACTIVATABLE))
#define PEAS_ACTIVATABLE_GET_IFACE(obj)   (G_TYPE_INSTANCE_GET_INTERFACE ((obj), PEAS_TYPE_ACTIVATABLE, PeasActivatableInterface))

/**
 * PeasActivatable:
 *
 * Interface for activatable plugins.
 */
typedef struct _PeasActivatable           PeasActivatable; /* dummy typedef */
typedef struct _PeasActivatableInterface  PeasActivatableInterface;

/**
 * PeasActivatableInterface:
 * @g_iface: The parent interface.
 * @activate: Activates the plugin.
 * @deactivate: Deactivates the plugin.
 * @update_state: Updates the plugin's internal state to take account of
 *  a change in the target object's state.
 *
 * Provides an interface for activatable plugins.
 */
struct _PeasActivatableInterface {
  GTypeInterface g_iface;

  /* Virtual public methods */
  void        (*activate)                 (PeasActivatable *activatable);
  void        (*deactivate)               (PeasActivatable *activatable);
  void        (*update_state)             (PeasActivatable *activatable);
};

/*
 * Public methods
 */
GType             peas_activatable_get_type       (void)  G_GNUC_CONST;

void              peas_activatable_activate       (PeasActivatable *activatable);
void              peas_activatable_deactivate     (PeasActivatable *activatable);
void              peas_activatable_update_state   (PeasActivatable *activatable);

G_END_DECLS

#endif /* __PEAS_ACTIVATABLE_H__ */
