gio/gsettingsbackend.h

   1 /*
   2  * Copyright © 2009, 2010 Codethink Limited
   3  * Copyright © 2010 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the licence, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Authors: Ryan Lortie <desrt@desrt.ca>
  21  *          Matthias Clasen <mclasen@redhat.com>
  22  */
  23
  24 #ifndef __G_SETTINGS_BACKEND_H__
  25 #define __G_SETTINGS_BACKEND_H__
  26
  27 #if !defined (G_SETTINGS_ENABLE_BACKEND) && !defined (GIO_COMPILATION)
  28 #error "You must define G_SETTINGS_ENABLE_BACKEND before including <gio/gsettingsbackend.h>."
  29 #endif
  30
  31 #define __GIO_GIO_H_INSIDE__
  32 #include <gio/giotypes.h>
  33 #undef __GIO_GIO_H_INSIDE__
  34
  35 G_BEGIN_DECLS
  36
  37 #define G_TYPE_SETTINGS_BACKEND                             (g_settings_backend_get_type ())
  38 #define G_SETTINGS_BACKEND(inst)                            (G_TYPE_CHECK_INSTANCE_CAST ((inst),                     \
  39                                                              G_TYPE_SETTINGS_BACKEND, GSettingsBackend))
  40 #define G_SETTINGS_BACKEND_CLASS(class)                     (G_TYPE_CHECK_CLASS_CAST ((class),                       \
  41                                                              G_TYPE_SETTINGS_BACKEND, GSettingsBackendClass))
  42 #define G_IS_SETTINGS_BACKEND(inst)                         (G_TYPE_CHECK_INSTANCE_TYPE ((inst),                     \
  43                                                              G_TYPE_SETTINGS_BACKEND))
  44 #define G_IS_SETTINGS_BACKEND_CLASS(class)                  (G_TYPE_CHECK_CLASS_TYPE ((class),                       \
  45                                                              G_TYPE_SETTINGS_BACKEND))
  46 #define G_SETTINGS_BACKEND_GET_CLASS(inst)                  (G_TYPE_INSTANCE_GET_CLASS ((inst),                      \
  47                                                              G_TYPE_SETTINGS_BACKEND, GSettingsBackendClass))
  48
  49 /**
  50  * G_SETTINGS_BACKEND_EXTENSION_POINT_NAME:
  51  *
  52  * Extension point for #GSettingsBackend functionality.
  53  **/
  54 #define G_SETTINGS_BACKEND_EXTENSION_POINT_NAME "gsettings-backend"
  55
  56 /**
  57  * GSettingsBackend:
  58  *
  59  * An implementation of a settings storage repository.
  60  **/
  61 typedef struct _GSettingsBackendPrivate                     GSettingsBackendPrivate;
  62 typedef struct _GSettingsBackendClass                       GSettingsBackendClass;
  63 typedef struct _GSettingsBackend                            GSettingsBackend;
  64
  65
  66 struct _GSettingsBackendClass
  67 {
  68   GObjectClass parent_class;
  69
  70   gboolean      (*supports_context) (const gchar         *context);
  71
  72   GVariant *    (*read)             (GSettingsBackend    *backend,
  73                                      const gchar         *key,
  74                                      const GVariantType  *expected_type,
  75                                      gboolean             default_value);
  76   gchar **      (*list)             (GSettingsBackend    *backend,
  77                                      const gchar         *path,
  78                                      gchar              **resets,
  79                                      gsize                n_resets,
  80                                      gsize               *length);
  81   gboolean      (*write)            (GSettingsBackend    *backend,
  82                                      const gchar         *key,
  83                                      GVariant            *value,
  84                                      gpointer             origin_tag);
  85   gboolean      (*write_keys)       (GSettingsBackend    *backend,
  86                                      GTree               *tree,
  87                                      gpointer             origin_tag);
  88   void          (*reset)            (GSettingsBackend    *backend,
  89                                      const gchar         *key,
  90                                      gpointer             origin_tag);
  91   void          (*reset_path)       (GSettingsBackend    *backend,
  92                                      const gchar         *path,
  93                                      gpointer             origin_tag);
  94   gboolean      (*get_writable)     (GSettingsBackend    *backend,
  95                                      const gchar         *key);
  96   void          (*subscribe)        (GSettingsBackend    *backend,
  97                                      const gchar         *name);
  98   void          (*unsubscribe)      (GSettingsBackend    *backend,
  99                                      const gchar         *name);
 100   void          (*sync)             (GSettingsBackend    *backend);
 101
 102   GPermission * (*get_permission)   (GSettingsBackend    *backend,
 103                                      const gchar         *path);
 104
 105   gpointer padding[7];
 106 };
 107
 108 struct _GSettingsBackend
 109 {
 110   GObject parent_instance;
 111
 112   /*< private >*/
 113   GSettingsBackendPrivate *priv;
 114 };
 115
 116 GType                           g_settings_backend_get_type             (void);
 117
 118 void                            g_settings_backend_setup                (const gchar         *context,
 119                                                                          GSettingsBackend    *backend);
 120 void                            g_settings_backend_setup_keyfile        (const gchar         *context,
 121                                                                          const gchar         *filename);
 122
 123 void                            g_settings_backend_changed              (GSettingsBackend    *backend,
 124                                                                          const gchar         *key,
 125                                                                          gpointer             origin_tag);
 126 void                            g_settings_backend_path_changed         (GSettingsBackend    *backend,
 127                                                                          const gchar         *path,
 128                                                                          gpointer             origin_tag);
 129 void                            g_settings_backend_flatten_tree         (GTree               *tree,
 130                                                                          gchar              **path,
 131                                                                          const gchar       ***keys,
 132                                                                          GVariant          ***values);
 133 void                            g_settings_backend_keys_changed         (GSettingsBackend    *backend,
 134                                                                          const gchar         *path,
 135                                                                          gchar const * const *items,
 136                                                                          gpointer             origin_tag);
 137
 138 void                            g_settings_backend_path_writable_changed(GSettingsBackend    *backend,
 139                                                                          const gchar         *path);
 140 void                            g_settings_backend_writable_changed     (GSettingsBackend    *backend,
 141                                                                          const gchar         *key);
 142 void                            g_settings_backend_changed_tree         (GSettingsBackend    *backend,
 143                                                                          GTree               *tree,
 144                                                                          gpointer             origin_tag);
 145
 146 G_END_DECLS
 147
 148 #endif /* __G_SETTINGS_BACKEND_H__ */