0
     OˆÐÙƒy°=ØÁÖ !<    O/*
 * Copyright Â© 2009, 2010 Codethink Limited
 * Copyright Â© 2010 Red Hat, 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, see <http://www.gnu.org/licenses/>.
 *
 * Authors: Ryan Lortie <desrt@desrt.ca>
 *          Matthias Clasen <mclasen@redhat.com>
 */

#ifndef __G_SETTINGS_BACKEND_H__
#define __G_SETTINGS_BACKEND_H__

#if !defined (G_SETTINGS_ENABLE_BACKEND) && !defined (GIO_COMPILATION)
#error "You must define G_SETTINGS_ENABLE_BACKEND before including <gio/gsettingsbackend.h>."
#endif

#define __GIO_GIO_H_INSIDE__
#include <gio/giotypes.h>
#undef __GIO_GIO_H_INSIDE__

G_BEGIN_DECLS

#define G_TYPE_SETTINGS_BACKEND                             (g_settings_backend_get_type ())
#define G_SETTINGS_BACKEND(inst)                            (G_TYPE_CHECK_INSTANCE_CAST ((inst),                     \
                                                             G_TYPE_SETTINGS_BACKEND, GSettingsBackend))
#define G_SETTINGS_BACKEND_CLASS(class)                     (G_TYPE_CHECK_CLASS_CAST ((class),                       \
                                                             G_TYPE_SETTINGS_BACKEND, GSettingsBackendClass))
#define G_IS_SETTINGS_BACKEND(inst)                         (G_TYPE_CHECK_INSTANCE_TYPE ((inst),                     \
                                                             G_TYPE_SETTINGS_BACKEND))
#define G_IS_SETTINGS_BACKEND_CLASS(class)                  (G_TYPE_CHECK_CLASS_TYPE ((class),                       \
                                                             G_TYPE_SETTINGS_BACKEND))
#define G_SETTINGS_BACKEND_GET_CLASS(inst)                  (G_TYPE_INSTANCE_GET_CLASS ((inst),                      \
                                                             G_TYPE_SETTINGS_BACKEND, GSettingsBackendClass))

/**
 * G_SETTINGS_BACKEND_EXTENSION_POINT_NAME:
 *
 * Extension point for #GSettingsBackend functionality.
 **/
#define G_SETTINGS_BACKEND_EXTENSION_POINT_NAME "gsettings-backend"

/**
 * GSettingsBackend:
 *
 * An implementation of a settings storage repository.
 **/
typedef struct _GSettingsBackendPrivate                     GSettingsBackendPrivate;
typedef struct _GSettingsBackendClass                       GSettingsBackendClass;

/**
 * GSettingsBackendClass:
 * @read: virtual method to read a key's value
 * @get_writable: virtual method to get if a key is writable
 * @write: virtual method to change key's value
 * @write_tree: virtual method to change a tree of keys
 * @reset: virtual method to reset state
 * @subscribe: virtual method to subscribe to key changes
 * @unsubscribe: virtual method to unsubscribe to key changes
 * @sync: virtual method to sync state
 * @get_permission: virtual method to get permission of a key
 * @read_user_value: virtual method to read user's key value
 *
 * Class structure for #GSettingsBackend.
 */
struct _GSettingsBackendClass
{
  GObjectClass parent_class;

  GVariant *    (*read)             (GSettingsBackend    *backend,
                                     const gchar         *key,
                                     const GVariantType  *expected_type,
                                     gboolean             default_value);

  gboolean      (*get_writable)     (GSettingsBackend    *backend,
                                     const gchar         *key);

  gboolean      (*write)            (GSettingsBackend    *backend,
                                     const gchar         *key,