gio/gnullsettingsbackend.c

   1 /*
   2  * Copyright © 2010 Codethink Limited
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the licence, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  *
  19  * Author: Ryan Lortie <desrt@desrt.ca>
  20  */
  21
  22 #include "config.h"
  23
  24 #include "gnullsettingsbackend.h"
  25
  26 #define G_TYPE_NULL_SETTINGS_BACKEND    (g_null_settings_backend_get_type ())
  27 #define G_NULL_SETTINGS_BACKEND(inst)   (G_TYPE_CHECK_INSTANCE_CAST ((inst), \
  28                                          G_TYPE_NULL_SETTINGS_BACKEND,       \
  29                                          GNullSettingsBackend))
  30
  31
  32 typedef GSettingsBackendClass GNullSettingsBackendClass;
  33 typedef GSettingsBackend      GNullSettingsBackend;
  34
  35 G_DEFINE_TYPE (GNullSettingsBackend,
  36                g_null_settings_backend,
  37                G_TYPE_SETTINGS_BACKEND)
  38
  39 static GVariant *
  40 g_null_settings_backend_read (GSettingsBackend   *backend,
  41                               const gchar        *key,
  42                               const GVariantType *expected_type)
  43 {
  44   return NULL;
  45 }
  46
  47 static gboolean
  48 g_null_settings_backend_write (GSettingsBackend *backend,
  49                                const gchar      *key,
  50                                GVariant         *value,
  51                                gpointer          origin_tag)
  52 {
  53   return FALSE;
  54 }
  55
  56 static gboolean
  57 g_null_settings_backend_write_keys (GSettingsBackend *backend,
  58                                     GTree            *tree,
  59                                     gpointer          origin_tag)
  60 {
  61   return FALSE;
  62 }
  63
  64 static void
  65 g_null_settings_backend_reset (GSettingsBackend *backend,
  66                                const gchar      *key,
  67                                gpointer          origin_tag)
  68 {
  69 }
  70
  71 static void
  72 g_null_settings_backend_reset_path (GSettingsBackend *backend,
  73                                     const gchar      *path,
  74                                     gpointer          origin_tag)
  75 {
  76 }
  77
  78 static gboolean
  79 g_null_settings_backend_get_writable (GSettingsBackend *backend,
  80                                         const gchar      *name)
  81 {
  82   return FALSE;
  83 }
  84
  85 static void
  86 g_null_settings_backend_init (GNullSettingsBackend *memory)
  87 {
  88 }
  89
  90 static void
  91 g_null_settings_backend_class_init (GNullSettingsBackendClass *class)
  92 {
  93   GSettingsBackendClass *backend_class = G_SETTINGS_BACKEND_CLASS (class);
  94
  95   backend_class->read = g_null_settings_backend_read;
  96   backend_class->write = g_null_settings_backend_write;
  97   backend_class->write_keys = g_null_settings_backend_write_keys;
  98   backend_class->reset = g_null_settings_backend_reset;
  99   backend_class->reset_path = g_null_settings_backend_reset_path;
 100   backend_class->get_writable = g_null_settings_backend_get_writable;
 101 }
 102
 103 GSettingsBackend *
 104 g_null_settings_backend_new (void)
 105 {
 106   return g_object_new (G_TYPE_NULL_SETTINGS_BACKEND, NULL);
 107 }