| /* |
| * Copyright © 2010 Codethink Limited |
| * |
| * SPDX-License-Identifier: LGPL-2.1-or-later |
| * |
| * 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/>. |
| * |
| * Author: Ryan Lortie <desrt@desrt.ca> |
| */ |
| |
| #include "config.h" |
| |
| #include "gsimplepermission.h" |
| #include "gsettingsbackendinternal.h" |
| #include "giomodule-priv.h" |
| |
| |
| #define G_TYPE_MEMORY_SETTINGS_BACKEND (g_memory_settings_backend_get_type()) |
| #define G_MEMORY_SETTINGS_BACKEND(inst) (G_TYPE_CHECK_INSTANCE_CAST ((inst), \ |
| G_TYPE_MEMORY_SETTINGS_BACKEND, \ |
| GMemorySettingsBackend)) |
| |
| typedef GSettingsBackendClass GMemorySettingsBackendClass; |
| typedef struct |
| { |
| GSettingsBackend parent_instance; |
| GHashTable *table; |
| } GMemorySettingsBackend; |
| |
| G_DEFINE_TYPE_WITH_CODE (GMemorySettingsBackend, |
| g_memory_settings_backend, |
| G_TYPE_SETTINGS_BACKEND, |
| _g_io_modules_ensure_extension_points_registered (); |
| g_io_extension_point_implement (G_SETTINGS_BACKEND_EXTENSION_POINT_NAME, |
| g_define_type_id, "memory", 10)) |
| |
| static GVariant * |
| g_memory_settings_backend_read (GSettingsBackend *backend, |
| const gchar *key, |
| const GVariantType *expected_type, |
| gboolean default_value) |
| { |
| GMemorySettingsBackend *memory = G_MEMORY_SETTINGS_BACKEND (backend); |
| GVariant *value; |
| |
| if (default_value) |
| return NULL; |
| |
| value = g_hash_table_lookup (memory->table, key); |
| |
| if (value != NULL) |
| g_variant_ref (value); |
| |
| return value; |
| } |
| |
| static gboolean |
| g_memory_settings_backend_write (GSettingsBackend *backend, |
| const gchar *key, |
| GVariant *value, |
| gpointer origin_tag) |
| { |
| GMemorySettingsBackend *memory = G_MEMORY_SETTINGS_BACKEND (backend); |
| GVariant *old_value; |
| |
| old_value = g_hash_table_lookup (memory->table, key); |
| g_variant_ref_sink (value); |
| |
| if (old_value == NULL || !g_variant_equal (value, old_value)) |
| { |
| g_hash_table_insert (memory->table, g_strdup (key), value); |
| g_settings_backend_changed (backend, key, origin_tag); |
| } |
| else |
| g_variant_unref (value); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| g_memory_settings_backend_write_one (gpointer key, |
| gpointer value, |
| gpointer data) |
| { |
| GMemorySettingsBackend *memory = data; |
| |
| if (value != NULL) |
| g_hash_table_insert (memory->table, g_strdup (key), g_variant_ref (value)); |
| else |
| g_hash_table_remove (memory->table, key); |
| |
| return FALSE; |
| } |
| |
| static gboolean |
| g_memory_settings_backend_write_tree (GSettingsBackend *backend, |
| GTree *tree, |
| gpointer origin_tag) |
| { |
| g_tree_foreach (tree, g_memory_settings_backend_write_one, backend); |
| g_settings_backend_changed_tree (backend, tree, origin_tag); |
| |
| return TRUE; |
| } |
| |
| static void |
| g_memory_settings_backend_reset (GSettingsBackend *backend, |
| const gchar *key, |
| gpointer origin_tag) |
| { |
| GMemorySettingsBackend *memory = G_MEMORY_SETTINGS_BACKEND (backend); |
| |
| if (g_hash_table_lookup (memory->table, key)) |
| { |
| g_hash_table_remove (memory->table, key); |
| g_settings_backend_changed (backend, key, origin_tag); |
| } |
| } |
| |
| static gboolean |
| g_memory_settings_backend_get_writable (GSettingsBackend *backend, |
| const gchar *name) |
| { |
| return TRUE; |
| } |
| |
| static GPermission * |
| g_memory_settings_backend_get_permission (GSettingsBackend *backend, |
| const gchar *path) |
| { |
| return g_simple_permission_new (TRUE); |
| } |
| |
| static void |
| g_memory_settings_backend_finalize (GObject *object) |
| { |
| GMemorySettingsBackend *memory = G_MEMORY_SETTINGS_BACKEND (object); |
| |
| g_hash_table_unref (memory->table); |
| |
| G_OBJECT_CLASS (g_memory_settings_backend_parent_class) |
| ->finalize (object); |
| } |
| |
| static void |
| g_memory_settings_backend_init (GMemorySettingsBackend *memory) |
| { |
| memory->table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, |
| (GDestroyNotify) g_variant_unref); |
| } |
| |
| static void |
| g_memory_settings_backend_class_init (GMemorySettingsBackendClass *class) |
| { |
| GSettingsBackendClass *backend_class = G_SETTINGS_BACKEND_CLASS (class); |
| GObjectClass *object_class = G_OBJECT_CLASS (class); |
| |
| backend_class->read = g_memory_settings_backend_read; |
| backend_class->write = g_memory_settings_backend_write; |
| backend_class->write_tree = g_memory_settings_backend_write_tree; |
| backend_class->reset = g_memory_settings_backend_reset; |
| backend_class->get_writable = g_memory_settings_backend_get_writable; |
| backend_class->get_permission = g_memory_settings_backend_get_permission; |
| object_class->finalize = g_memory_settings_backend_finalize; |
| } |
| |
| /** |
| * g_memory_settings_backend_new: |
| * |
| * Creates a memory-backed #GSettingsBackend. |
| * |
| * This backend allows changes to settings, but does not write them |
| * to any backing storage, so the next time you run your application, |
| * the memory backend will start out with the default values again. |
| * |
| * Returns: (transfer full): a newly created #GSettingsBackend |
| * |
| * Since: 2.28 |
| */ |
| GSettingsBackend * |
| g_memory_settings_backend_new (void) |
| { |
| return g_object_new (G_TYPE_MEMORY_SETTINGS_BACKEND, NULL); |
| } |