2 * Copyright © 2010 Codethink Limited
3 * Copyright © 2011 Canonical Limited
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.
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.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 #include "gsettingsschema-internal.h"
22 #include "gsettings.h"
24 #include "gvdb/gvdb-reader.h"
32 * SECTION:gsettingsschema
33 * @short_description: Introspecting and controlling the loading
34 * of GSettings schemas
37 * The #GSettingsSchemaSource and #GSettingsSchema APIs provide a
38 * mechanism for advanced control over the loading of schemas and a
39 * mechanism for introspecting their content.
41 * Plugin loading systems that wish to provide plugins a way to access
42 * settings face the problem of how to make the schemas for these
43 * settings visible to GSettings. Typically, a plugin will want to ship
44 * the schema along with itself and it won't be installed into the
45 * standard system directories for schemas.
47 * #GSettingsSchemaSource provides a mechanism for dealing with this by
48 * allowing the creation of a new 'schema source' from which schemas can
49 * be acquired. This schema source can then become part of the metadata
50 * associated with the plugin and queried whenever the plugin requires
51 * access to some settings.
53 * Consider the following example:
55 * |[<!-- language="C" -->
59 * GSettingsSchemaSource *schema_source;
64 * initialise_plugin (const gchar *dir)
70 * plugin->schema_source =
71 * g_settings_new_schema_source_from_directory (dir,
72 * g_settings_schema_source_get_default (), FALSE, NULL);
82 * plugin_get_settings (Plugin *plugin,
83 * const gchar *schema_id)
85 * GSettingsSchema *schema;
87 * if (schema_id == NULL)
88 * schema_id = plugin->identifier;
90 * schema = g_settings_schema_source_lookup (plugin->schema_source,
95 * ... disable the plugin or abort, etc ...
98 * return g_settings_new_full (schema, NULL, NULL);
102 * The code above shows how hooks should be added to the code that
103 * initialises (or enables) the plugin to create the schema source and
104 * how an API can be added to the plugin system to provide a convenient
105 * way for the plugin to access its settings, using the schemas that it
108 * From the standpoint of the plugin, it would need to ensure that it
109 * ships a gschemas.compiled file as part of itself, and then simply do
112 * |[<!-- language="C" -->
114 * GSettings *settings;
117 * settings = plugin_get_settings (self, NULL);
118 * some_value = g_settings_get_int (settings, "some-value");
123 * It's also possible that the plugin system expects the schema source
124 * files (ie: .gschema.xml files) instead of a gschemas.compiled file.
125 * In that case, the plugin loading system must compile the schemas for
126 * itself before attempting to create the settings source.
134 * This is an opaque structure type. You may not access it directly.
138 struct _GSettingsSchema
140 GSettingsSchemaSource *source;
141 const gchar *gettext_domain;
148 GSettingsSchema *extends;
154 * G_TYPE_SETTINGS_SCHEMA_SOURCE:
156 * A boxed #GType corresponding to #GSettingsSchemaSource.
160 G_DEFINE_BOXED_TYPE (GSettingsSchemaSource, g_settings_schema_source, g_settings_schema_source_ref, g_settings_schema_source_unref)
163 * G_TYPE_SETTINGS_SCHEMA:
165 * A boxed #GType corresponding to #GSettingsSchema.
169 G_DEFINE_BOXED_TYPE (GSettingsSchema, g_settings_schema, g_settings_schema_ref, g_settings_schema_unref)
172 * GSettingsSchemaSource:
174 * This is an opaque structure type. You may not access it directly.
178 struct _GSettingsSchemaSource
180 GSettingsSchemaSource *parent;
183 GHashTable **text_tables;
188 static GSettingsSchemaSource *schema_sources;
191 * g_settings_schema_source_ref:
192 * @source: a #GSettingsSchemaSource
194 * Increase the reference count of @source, returning a new reference.
196 * Returns: a new reference to @source
200 GSettingsSchemaSource *
201 g_settings_schema_source_ref (GSettingsSchemaSource *source)
203 g_atomic_int_inc (&source->ref_count);
209 * g_settings_schema_source_unref:
210 * @source: a #GSettingsSchemaSource
212 * Decrease the reference count of @source, possibly freeing it.
217 g_settings_schema_source_unref (GSettingsSchemaSource *source)
219 if (g_atomic_int_dec_and_test (&source->ref_count))
221 if (source == schema_sources)
222 g_error ("g_settings_schema_source_unref() called too many times on the default schema source");
225 g_settings_schema_source_unref (source->parent);
226 gvdb_table_unref (source->table);
227 g_free (source->directory);
229 if (source->text_tables)
231 g_hash_table_unref (source->text_tables[0]);
232 g_hash_table_unref (source->text_tables[1]);
233 g_free (source->text_tables);
236 g_slice_free (GSettingsSchemaSource, source);
241 * g_settings_schema_source_new_from_directory:
242 * @directory: the filename of a directory
243 * @parent: (allow-none): a #GSettingsSchemaSource, or %NULL
244 * @trusted: %TRUE, if the directory is trusted
245 * @error: a pointer to a #GError pointer set to %NULL, or %NULL
247 * Attempts to create a new schema source corresponding to the contents
248 * of the given directory.
250 * This function is not required for normal uses of #GSettings but it
251 * may be useful to authors of plugin management systems.
253 * The directory should contain a file called
254 * <filename>gschemas.compiled</filename> as produced by the
255 * <link linkend="glib-compile-schemas">glib-compile-schemas</link> tool.
257 * If @trusted is %TRUE then <filename>gschemas.compiled</filename> is
258 * trusted not to be corrupted. This assumption has a performance
259 * advantage, but can result in crashes or inconsistent behaviour in the
260 * case of a corrupted file. Generally, you should set @trusted to
261 * %TRUE for files installed by the system and to %FALSE for files in
262 * the home directory.
264 * If @parent is non-%NULL then there are two effects.
266 * First, if g_settings_schema_source_lookup() is called with the
267 * @recursive flag set to %TRUE and the schema can not be found in the
268 * source, the lookup will recurse to the parent.
270 * Second, any references to other schemas specified within this
271 * source (ie: <literal>child</literal> or <literal>extends</literal>)
272 * references may be resolved from the @parent.
274 * For this second reason, except in very unusual situations, the
275 * @parent should probably be given as the default schema source, as
276 * returned by g_settings_schema_source_get_default().
280 GSettingsSchemaSource *
281 g_settings_schema_source_new_from_directory (const gchar *directory,
282 GSettingsSchemaSource *parent,
286 GSettingsSchemaSource *source;
290 filename = g_build_filename (directory, "gschemas.compiled", NULL);
291 table = gvdb_table_new (filename, trusted, error);
297 source = g_slice_new (GSettingsSchemaSource);
298 source->directory = g_strdup (directory);
299 source->parent = parent ? g_settings_schema_source_ref (parent) : NULL;
300 source->text_tables = NULL;
301 source->table = table;
302 source->ref_count = 1;
308 try_prepend_dir (const gchar *directory)
310 GSettingsSchemaSource *source;
312 source = g_settings_schema_source_new_from_directory (directory, schema_sources, TRUE, NULL);
314 /* If we successfully created it then prepend it to the global list */
316 schema_sources = source;
320 initialise_schema_sources (void)
322 static gsize initialised;
324 /* need a separate variable because 'schema_sources' may legitimately
325 * be null if we have zero valid schema sources
327 if G_UNLIKELY (g_once_init_enter (&initialised))
329 const gchar * const *dirs;
333 /* iterate in reverse: count up, then count down */
334 dirs = g_get_system_data_dirs ();
335 for (i = 0; dirs[i]; i++);
341 dirname = g_build_filename (dirs[i], "glib-2.0", "schemas", NULL);
342 try_prepend_dir (dirname);
346 if ((path = g_getenv ("GSETTINGS_SCHEMA_DIR")) != NULL)
347 try_prepend_dir (path);
349 g_once_init_leave (&initialised, TRUE);
354 * g_settings_schema_source_get_default:
356 * Gets the default system schema source.
358 * This function is not required for normal uses of #GSettings but it
359 * may be useful to authors of plugin management systems or to those who
360 * want to introspect the content of schemas.
362 * If no schemas are installed, %NULL will be returned.
364 * The returned source may actually consist of multiple schema sources
365 * from different directories, depending on which directories were given
366 * in `XDG_DATA_DIRS` and `GSETTINGS_SCHEMA_DIR`. For this reason, all
367 * lookups performed against the default source should probably be done
370 * Returns: (transfer none): the default schema source
374 GSettingsSchemaSource *
375 g_settings_schema_source_get_default (void)
377 initialise_schema_sources ();
379 return schema_sources;
383 * g_settings_schema_source_lookup:
384 * @source: a #GSettingsSchemaSource
385 * @schema_id: a schema ID
386 * @recursive: %TRUE if the lookup should be recursive
388 * Looks up a schema with the identifier @schema_id in @source.
390 * This function is not required for normal uses of #GSettings but it
391 * may be useful to authors of plugin management systems or to those who
392 * want to introspect the content of schemas.
394 * If the schema isn't found directly in @source and @recursive is %TRUE
395 * then the parent sources will also be checked.
397 * If the schema isn't found, %NULL is returned.
399 * Returns: (transfer full): a new #GSettingsSchema
404 g_settings_schema_source_lookup (GSettingsSchemaSource *source,
405 const gchar *schema_id,
408 GSettingsSchema *schema;
410 const gchar *extends;
412 g_return_val_if_fail (source != NULL, NULL);
413 g_return_val_if_fail (schema_id != NULL, NULL);
415 table = gvdb_table_get_table (source->table, schema_id);
417 if (table == NULL && recursive)
418 for (source = source->parent; source; source = source->parent)
419 if ((table = gvdb_table_get_table (source->table, schema_id)))
425 schema = g_slice_new0 (GSettingsSchema);
426 schema->source = g_settings_schema_source_ref (source);
427 schema->ref_count = 1;
428 schema->id = g_strdup (schema_id);
429 schema->table = table;
430 schema->path = g_settings_schema_get_string (schema, ".path");
431 schema->gettext_domain = g_settings_schema_get_string (schema, ".gettext-domain");
433 if (schema->gettext_domain)
434 bind_textdomain_codeset (schema->gettext_domain, "UTF-8");
436 extends = g_settings_schema_get_string (schema, ".extends");
439 schema->extends = g_settings_schema_source_lookup (source, extends, TRUE);
440 if (schema->extends == NULL)
441 g_warning ("Schema '%s' extends schema '%s' but we could not find it", schema_id, extends);
449 GHashTable *summaries;
450 GHashTable *descriptions;
451 GSList *gettext_domain;
455 } TextTableParseInfo;
458 get_attribute_value (GSList *list)
462 for (node = list; node; node = node->next)
470 pop_attribute_value (GSList **list)
475 *list = g_slist_remove (*list, top);
481 push_attribute_value (GSList **list,
484 *list = g_slist_prepend (*list, g_strdup (value));
488 start_element (GMarkupParseContext *context,
489 const gchar *element_name,
490 const gchar **attribute_names,
491 const gchar **attribute_values,
495 TextTableParseInfo *info = user_data;
496 const gchar *gettext_domain = NULL;
497 const gchar *schema_id = NULL;
498 const gchar *key_name = NULL;
501 for (i = 0; attribute_names[i]; i++)
503 if (g_str_equal (attribute_names[i], "gettext-domain"))
504 gettext_domain = attribute_values[i];
505 else if (g_str_equal (attribute_names[i], "id"))
506 schema_id = attribute_values[i];
507 else if (g_str_equal (attribute_names[i], "name"))
508 key_name = attribute_values[i];
511 push_attribute_value (&info->gettext_domain, gettext_domain);
512 push_attribute_value (&info->schema_id, schema_id);
513 push_attribute_value (&info->key_name, key_name);
517 g_string_free (info->string, TRUE);
521 if (g_str_equal (element_name, "summary") || g_str_equal (element_name, "description"))
522 info->string = g_string_new (NULL);
526 normalise_whitespace (const gchar *orig)
528 /* We normalise by the same rules as in intltool:
537 * $message = join "\n\n", map &cleanup, split/\n\s*\n+/, $message;
539 * Where \s is an ascii space character.
541 * We aim for ease of implementation over efficiency -- this code is
542 * not run in normal applications.
544 static GRegex *cleanup[3];
545 static GRegex *splitter;
550 if (g_once_init_enter (&splitter))
554 cleanup[0] = g_regex_new ("^\\s+", 0, 0, 0);
555 cleanup[1] = g_regex_new ("\\s+$", 0, 0, 0);
556 cleanup[2] = g_regex_new ("\\s+", 0, 0, 0);
557 s = g_regex_new ("\\n\\s*\\n+", 0, 0, 0);
559 g_once_init_leave (&splitter, s);
562 lines = g_regex_split (splitter, orig, 0);
563 for (i = 0; lines[i]; i++)
567 a = g_regex_replace_literal (cleanup[0], lines[i], -1, 0, "", 0, 0);
568 b = g_regex_replace_literal (cleanup[1], a, -1, 0, "", 0, 0);
569 c = g_regex_replace_literal (cleanup[2], b, -1, 0, " ", 0, 0);
576 result = g_strjoinv ("\n\n", lines);
583 end_element (GMarkupParseContext *context,
584 const gchar *element_name,
588 TextTableParseInfo *info = user_data;
590 pop_attribute_value (&info->gettext_domain);
591 pop_attribute_value (&info->schema_id);
592 pop_attribute_value (&info->key_name);
596 GHashTable *source_table = NULL;
597 const gchar *gettext_domain;
598 const gchar *schema_id;
599 const gchar *key_name;
601 gettext_domain = get_attribute_value (info->gettext_domain);
602 schema_id = get_attribute_value (info->schema_id);
603 key_name = get_attribute_value (info->key_name);
605 if (g_str_equal (element_name, "summary"))
606 source_table = info->summaries;
607 else if (g_str_equal (element_name, "description"))
608 source_table = info->descriptions;
610 if (source_table && schema_id && key_name)
612 GHashTable *schema_table;
615 schema_table = g_hash_table_lookup (source_table, schema_id);
617 if (schema_table == NULL)
619 schema_table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
620 g_hash_table_insert (source_table, g_strdup (schema_id), schema_table);
623 normalised = normalise_whitespace (info->string->str);
629 translated = g_strdup (g_dgettext (gettext_domain, normalised));
631 normalised = translated;
634 g_hash_table_insert (schema_table, g_strdup (key_name), normalised);
637 g_string_free (info->string, TRUE);
643 text (GMarkupParseContext *context,
649 TextTableParseInfo *info = user_data;
652 g_string_append_len (info->string, text, text_len);
656 parse_into_text_tables (const gchar *directory,
657 GHashTable *summaries,
658 GHashTable *descriptions)
660 GMarkupParser parser = { start_element, end_element, text };
661 TextTableParseInfo info = { summaries, descriptions };
662 const gchar *basename;
665 dir = g_dir_open (directory, 0, NULL);
666 while ((basename = g_dir_read_name (dir)))
672 filename = g_build_filename (directory, basename, NULL);
673 if (g_file_get_contents (filename, &contents, &size, NULL))
675 GMarkupParseContext *context;
677 context = g_markup_parse_context_new (&parser, G_MARKUP_TREAT_CDATA_AS_TEXT, &info, NULL);
678 if (g_markup_parse_context_parse (context, contents, size, NULL))
679 g_markup_parse_context_end_parse (context, NULL);
680 g_markup_parse_context_free (context);
682 /* Clean up dangling stuff in case there was an error. */
683 g_slist_free_full (info.gettext_domain, g_free);
684 g_slist_free_full (info.schema_id, g_free);
685 g_slist_free_full (info.key_name, g_free);
687 info.gettext_domain = NULL;
688 info.schema_id = NULL;
689 info.key_name = NULL;
693 g_string_free (info.string, TRUE);
705 g_settings_schema_source_get_text_tables (GSettingsSchemaSource *source)
707 if (g_once_init_enter (&source->text_tables))
709 GHashTable **text_tables;
711 text_tables = g_new (GHashTable *, 2);
712 text_tables[0] = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_hash_table_unref);
713 text_tables[1] = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_hash_table_unref);
715 if (source->directory)
716 parse_into_text_tables (source->directory, text_tables[0], text_tables[1]);
718 g_once_init_leave (&source->text_tables, text_tables);
721 return source->text_tables;
725 * g_settings_schema_source_list_schemas:
726 * @source: a #GSettingsSchemaSource
727 * @recursive: if we should recurse
728 * @non_relocatable: (out) (transfer full): the list of non-relocatable
730 * @relocatable: (out) (transfer full): the list of relocatable schemas
732 * Lists the schemas in a given source.
734 * If @recursive is %TRUE then include parent sources. If %FALSE then
735 * only include the schemas from one source (ie: one directory). You
736 * probably want %TRUE.
738 * Non-relocatable schemas are those for which you can call
739 * g_settings_new(). Relocatable schemas are those for which you must
740 * use g_settings_new_with_path().
742 * Do not call this function from normal programs. This is designed for
743 * use by database editors, commandline tools, etc.
748 g_settings_schema_source_list_schemas (GSettingsSchemaSource *source,
750 gchar ***non_relocatable,
751 gchar ***relocatable)
753 GHashTable *single, *reloc;
754 GSettingsSchemaSource *s;
756 /* We use hash tables to avoid duplicate listings for schemas that
757 * appear in more than one file.
759 single = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
760 reloc = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
762 for (s = source; s; s = s->parent)
767 list = gvdb_table_list (s->table, "");
769 /* empty schema cache file? */
773 for (i = 0; list[i]; i++)
775 if (!g_hash_table_lookup (single, list[i]) &&
776 !g_hash_table_lookup (reloc, list[i]))
780 table = gvdb_table_get_table (s->table, list[i]);
781 g_assert (table != NULL);
783 if (gvdb_table_has_value (table, ".path"))
784 g_hash_table_insert (single, g_strdup (list[i]), NULL);
786 g_hash_table_insert (reloc, g_strdup (list[i]), NULL);
788 gvdb_table_unref (table);
794 /* Only the first source if recursive not requested */
801 *non_relocatable = (gchar **) g_hash_table_get_keys_as_array (single, NULL);
802 g_hash_table_steal_all (single);
807 *relocatable = (gchar **) g_hash_table_get_keys_as_array (reloc, NULL);
808 g_hash_table_steal_all (reloc);
811 g_hash_table_unref (single);
812 g_hash_table_unref (reloc);
815 static gchar **non_relocatable_schema_list;
816 static gchar **relocatable_schema_list;
817 static gsize schema_lists_initialised;
820 ensure_schema_lists (void)
822 if (g_once_init_enter (&schema_lists_initialised))
824 initialise_schema_sources ();
826 g_settings_schema_source_list_schemas (schema_sources, TRUE,
827 &non_relocatable_schema_list,
828 &relocatable_schema_list);
830 g_once_init_leave (&schema_lists_initialised, TRUE);
835 * g_settings_list_schemas:
837 * Returns: (element-type utf8) (transfer none): a list of #GSettings
838 * schemas that are available. The list must not be modified or
843 * Deprecated:2.40: Use g_settings_schema_source_list_schemas() instead.
844 * If you used g_settings_list_schemas() to check for the presence of
845 * a particular schema, use g_settings_schema_source_lookup() instead
846 * of your whole loop.
848 const gchar * const *
849 g_settings_list_schemas (void)
851 ensure_schema_lists ();
853 return (const gchar **) non_relocatable_schema_list;
857 * g_settings_list_relocatable_schemas:
859 * Returns: (element-type utf8) (transfer none): a list of relocatable
860 * #GSettings schemas that are available. The list must not be
865 * Deprecated:2.40: Use g_settings_schema_source_list_schemas() instead
867 const gchar * const *
868 g_settings_list_relocatable_schemas (void)
870 ensure_schema_lists ();
872 return (const gchar **) relocatable_schema_list;
876 * g_settings_schema_ref:
877 * @schema: a #GSettingsSchema
879 * Increase the reference count of @schema, returning a new reference.
881 * Returns: a new reference to @schema
886 g_settings_schema_ref (GSettingsSchema *schema)
888 g_atomic_int_inc (&schema->ref_count);
894 * g_settings_schema_unref:
895 * @schema: a #GSettingsSchema
897 * Decrease the reference count of @schema, possibly freeing it.
902 g_settings_schema_unref (GSettingsSchema *schema)
904 if (g_atomic_int_dec_and_test (&schema->ref_count))
907 g_settings_schema_unref (schema->extends);
909 g_settings_schema_source_unref (schema->source);
910 gvdb_table_unref (schema->table);
911 g_free (schema->items);
914 g_slice_free (GSettingsSchema, schema);
919 g_settings_schema_get_string (GSettingsSchema *schema,
922 const gchar *result = NULL;
925 if ((value = gvdb_table_get_raw_value (schema->table, key)))
927 result = g_variant_get_string (value, NULL);
928 g_variant_unref (value);
935 g_settings_schema_get_value (GSettingsSchema *schema,
938 GSettingsSchema *s = schema;
942 g_return_val_if_fail (schema != NULL, NULL);
944 for (s = schema; s; s = s->extends)
945 if ((value = gvdb_table_get_raw_value (s->table, key)))
948 if G_UNLIKELY (value == NULL || !g_variant_is_of_type (value, G_VARIANT_TYPE_TUPLE))
949 g_error ("Settings schema '%s' does not contain a key named '%s'", schema->id, key);
951 iter = g_variant_iter_new (value);
952 g_variant_unref (value);
958 * g_settings_schema_get_path:
959 * @schema: a #GSettingsSchema
961 * Gets the path associated with @schema, or %NULL.
963 * Schemas may be single-instance or relocatable. Single-instance
964 * schemas correspond to exactly one set of keys in the backend
965 * database: those located at the path returned by this function.
967 * Relocatable schemas can be referenced by other schemas and can
968 * threfore describe multiple sets of keys at different locations. For
969 * relocatable schemas, this function will return %NULL.
971 * Returns: (transfer none): the path of the schema, or %NULL
976 g_settings_schema_get_path (GSettingsSchema *schema)
982 g_settings_schema_get_gettext_domain (GSettingsSchema *schema)
984 return schema->gettext_domain;
988 * g_settings_schema_has_key:
989 * @schema: a #GSettingsSchema
990 * @name: the name of a key
992 * Checks if @schema has a key named @name.
994 * Returns: %TRUE if such a key exists
999 g_settings_schema_has_key (GSettingsSchema *schema,
1002 return gvdb_table_has_value (schema->table, key);
1006 g_settings_schema_list (GSettingsSchema *schema,
1009 if (schema->items == NULL)
1012 GHashTableIter iter;
1018 items = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
1020 for (s = schema; s; s = s->extends)
1024 list = gvdb_table_list (s->table, "");
1028 for (i = 0; list[i]; i++)
1029 g_hash_table_add (items, list[i]); /* transfer ownership */
1031 g_free (list); /* free container only */
1035 /* Do a first pass to eliminate child items that do not map to
1036 * valid schemas (ie: ones that would crash us if we actually
1037 * tried to create them).
1039 g_hash_table_iter_init (&iter, items);
1040 while (g_hash_table_iter_next (&iter, &name, NULL))
1041 if (g_str_has_suffix (name, "/"))
1043 GSettingsSchemaSource *source;
1044 GVariant *child_schema;
1045 GvdbTable *child_table;
1047 child_schema = gvdb_table_get_raw_value (schema->table, name);
1053 for (source = schema_sources; source; source = source->parent)
1054 if ((child_table = gvdb_table_get_table (source->table, g_variant_get_string (child_schema, NULL))))
1057 g_variant_unref (child_schema);
1059 /* Schema is not found -> remove it from the list */
1060 if (child_table == NULL)
1062 g_hash_table_iter_remove (&iter);
1066 /* Make sure the schema is relocatable or at the
1069 if (gvdb_table_has_value (child_table, ".path"))
1075 path = gvdb_table_get_raw_value (child_table, ".path");
1076 expected = g_strconcat (schema->path, name, NULL);
1077 same = g_str_equal (expected, g_variant_get_string (path, NULL));
1078 g_variant_unref (path);
1081 /* Schema is non-relocatable and did not have the
1082 * expected path -> remove it from the list
1085 g_hash_table_iter_remove (&iter);
1088 gvdb_table_unref (child_table);
1091 /* Now create the list */
1092 len = g_hash_table_size (items);
1093 schema->items = g_new (GQuark, len);
1095 g_hash_table_iter_init (&iter, items);
1097 while (g_hash_table_iter_next (&iter, &name, NULL))
1098 schema->items[i++] = g_quark_from_string (name);
1099 schema->n_items = i;
1100 g_assert (i == len);
1102 g_hash_table_unref (items);
1105 *n_items = schema->n_items;
1106 return schema->items;
1110 * g_settings_schema_get_id:
1111 * @schema: a #GSettingsSchema
1113 * Get the ID of @schema.
1115 * Returns: (transfer none): the ID
1118 g_settings_schema_get_id (GSettingsSchema *schema)
1124 endian_fixup (GVariant **value)
1126 #if G_BYTE_ORDER == G_BIG_ENDIAN
1129 tmp = g_variant_byteswap (*value);
1130 g_variant_unref (*value);
1136 g_settings_schema_key_init (GSettingsSchemaKey *key,
1137 GSettingsSchema *schema,
1144 memset (key, 0, sizeof *key);
1146 iter = g_settings_schema_get_value (schema, name);
1148 key->schema = g_settings_schema_ref (schema);
1149 key->default_value = g_variant_iter_next_value (iter);
1150 endian_fixup (&key->default_value);
1151 key->type = g_variant_get_type (key->default_value);
1152 key->name = g_intern_string (name);
1154 while (g_variant_iter_next (iter, "(y*)", &code, &data))
1159 /* translation requested */
1160 g_variant_get (data, "(y&s)", &key->lc_char, &key->unparsed);
1164 /* enumerated types... */
1165 key->is_enum = TRUE;
1170 key->is_flags = TRUE;
1174 /* ..., choices, aliases */
1175 key->strinfo = g_variant_get_fixed_array (data, &key->strinfo_length, sizeof (guint32));
1179 g_variant_get (data, "(**)", &key->minimum, &key->maximum);
1180 endian_fixup (&key->minimum);
1181 endian_fixup (&key->maximum);
1185 g_warning ("unknown schema extension '%c'", code);
1189 g_variant_unref (data);
1192 g_variant_iter_free (iter);
1196 g_settings_schema_key_clear (GSettingsSchemaKey *key)
1199 g_variant_unref (key->minimum);
1202 g_variant_unref (key->maximum);
1204 g_variant_unref (key->default_value);
1206 g_settings_schema_unref (key->schema);
1210 g_settings_schema_key_type_check (GSettingsSchemaKey *key,
1213 g_return_val_if_fail (value != NULL, FALSE);
1215 return g_variant_is_of_type (value, key->type);
1219 g_settings_schema_key_range_fixup (GSettingsSchemaKey *key,
1222 const gchar *target;
1224 if (g_settings_schema_key_range_check (key, value))
1225 return g_variant_ref (value);
1227 if (key->strinfo == NULL)
1230 if (g_variant_is_container (value))
1232 GVariantBuilder builder;
1236 g_variant_iter_init (&iter, value);
1237 g_variant_builder_init (&builder, g_variant_get_type (value));
1239 while ((child = g_variant_iter_next_value (&iter)))
1243 fixed = g_settings_schema_key_range_fixup (key, child);
1244 g_variant_unref (child);
1248 g_variant_builder_clear (&builder);
1252 g_variant_builder_add_value (&builder, fixed);
1253 g_variant_unref (fixed);
1256 return g_variant_ref_sink (g_variant_builder_end (&builder));
1259 target = strinfo_string_from_alias (key->strinfo, key->strinfo_length,
1260 g_variant_get_string (value, NULL));
1261 return target ? g_variant_ref_sink (g_variant_new_string (target)) : NULL;
1265 g_settings_schema_key_get_translated_default (GSettingsSchemaKey *key)
1267 const gchar *translated;
1268 GError *error = NULL;
1269 const gchar *domain;
1272 domain = g_settings_schema_get_gettext_domain (key->schema);
1274 if (key->lc_char == '\0')
1275 /* translation not requested for this key */
1278 if (key->lc_char == 't')
1279 translated = g_dcgettext (domain, key->unparsed, LC_TIME);
1281 translated = g_dgettext (domain, key->unparsed);
1283 if (translated == key->unparsed)
1284 /* the default value was not translated */
1287 /* try to parse the translation of the unparsed default */
1288 value = g_variant_parse (key->type, translated, NULL, NULL, &error);
1292 g_warning ("Failed to parse translated string '%s' for "
1293 "key '%s' in schema '%s': %s", key->unparsed, key->name,
1294 g_settings_schema_get_id (key->schema), error->message);
1295 g_warning ("Using untranslated default instead.");
1296 g_error_free (error);
1299 else if (!g_settings_schema_key_range_check (key, value))
1301 g_warning ("Translated default '%s' for key '%s' in schema '%s' "
1302 "is outside of valid range", key->unparsed, key->name,
1303 g_settings_schema_get_id (key->schema));
1304 g_variant_unref (value);
1312 g_settings_schema_key_to_enum (GSettingsSchemaKey *key,
1318 it_worked = strinfo_enum_from_string (key->strinfo, key->strinfo_length,
1319 g_variant_get_string (value, NULL),
1322 /* 'value' can only come from the backend after being filtered for validity,
1323 * from the translation after being filtered for validity, or from the schema
1324 * itself (which the schema compiler checks for validity). If this assertion
1325 * fails then it's really a bug in GSettings or the schema compiler...
1327 g_assert (it_worked);
1333 g_settings_schema_key_from_enum (GSettingsSchemaKey *key,
1336 const gchar *string;
1338 string = strinfo_string_from_enum (key->strinfo, key->strinfo_length, value);
1343 return g_variant_new_string (string);
1347 g_settings_schema_key_to_flags (GSettingsSchemaKey *key,
1355 g_variant_iter_init (&iter, value);
1356 while (g_variant_iter_next (&iter, "&s", &flag))
1361 it_worked = strinfo_enum_from_string (key->strinfo, key->strinfo_length, flag, &flag_value);
1362 /* as in g_settings_to_enum() */
1363 g_assert (it_worked);
1365 result |= flag_value;
1372 g_settings_schema_key_from_flags (GSettingsSchemaKey *key,
1375 GVariantBuilder builder;
1378 g_variant_builder_init (&builder, G_VARIANT_TYPE ("as"));
1380 for (i = 0; i < 32; i++)
1381 if (value & (1u << i))
1383 const gchar *string;
1385 string = strinfo_string_from_enum (key->strinfo, key->strinfo_length, 1u << i);
1389 g_variant_builder_clear (&builder);
1393 g_variant_builder_add (&builder, "s", string);
1396 return g_variant_builder_end (&builder);
1399 G_DEFINE_BOXED_TYPE (GSettingsSchemaKey, g_settings_schema_key, g_settings_schema_key_ref, g_settings_schema_key_unref)
1402 * g_settings_schema_key_ref:
1403 * @key: a #GSettingsSchemaKey
1405 * Increase the reference count of @key, returning a new reference.
1407 * Returns: a new reference to @key
1411 GSettingsSchemaKey *
1412 g_settings_schema_key_ref (GSettingsSchemaKey *key)
1414 g_return_val_if_fail (key != NULL, NULL);
1416 g_atomic_int_inc (&key->ref_count);
1422 * g_settings_schema_key_unref:
1423 * @key: a #GSettingsSchemaKey
1425 * Decrease the reference count of @key, possibly freeing it.
1430 g_settings_schema_key_unref (GSettingsSchemaKey *key)
1432 g_return_if_fail (key != NULL);
1434 if (g_atomic_int_dec_and_test (&key->ref_count))
1436 g_settings_schema_key_clear (key);
1438 g_slice_free (GSettingsSchemaKey, key);
1443 * g_settings_schema_get_key:
1444 * @schema: a #GSettingsSchema
1445 * @name: the name of a key
1447 * Gets the key named @name from @schema.
1449 * It is a programmer error to request a key that does not exist. See
1450 * g_settings_schema_list_keys().
1452 * Returns: (transfer full): the #GSettingsSchemaKey for @name
1456 GSettingsSchemaKey *
1457 g_settings_schema_get_key (GSettingsSchema *schema,
1460 GSettingsSchemaKey *key;
1462 g_return_val_if_fail (schema != NULL, NULL);
1463 g_return_val_if_fail (name != NULL, NULL);
1465 key = g_slice_new (GSettingsSchemaKey);
1466 g_settings_schema_key_init (key, schema, name);
1473 * g_settings_schema_key_get_summary:
1474 * @key: a #GSettingsSchemaKey
1476 * Gets the summary for @key.
1478 * If no summary has been provided in the schema for @key, returns
1481 * The summary is a short description of the purpose of the key; usually
1482 * one short sentence. Summaries can be translated and the value
1483 * returned from this function is is the current locale.
1485 * This function is slow. The summary and description information for
1486 * the schemas is not stored in the compiled schema database so this
1487 * function has to parse all of the source XML files in the schema
1490 * Returns: the summary for @key, or %NULL
1495 g_settings_schema_key_get_summary (GSettingsSchemaKey *key)
1497 GHashTable **text_tables;
1498 GHashTable *summaries;
1500 text_tables = g_settings_schema_source_get_text_tables (key->schema->source);
1501 summaries = g_hash_table_lookup (text_tables[0], key->schema->id);
1503 return summaries ? g_hash_table_lookup (summaries, key->name) : NULL;
1507 * g_settings_schema_key_get_description:
1508 * @key: a #GSettingsSchemaKey
1510 * Gets the description for @key.
1512 * If no description has been provided in the schema for @key, returns
1515 * The description can be one sentence to several paragraphs in length.
1516 * Paragraphs are delimited with a double newline. Descriptions can be
1517 * translated and the value returned from this function is is the
1520 * This function is slow. The summary and description information for
1521 * the schemas is not stored in the compiled schema database so this
1522 * function has to parse all of the source XML files in the schema
1525 * Returns: the description for @key, or %NULL
1530 g_settings_schema_key_get_description (GSettingsSchemaKey *key)
1532 GHashTable **text_tables;
1533 GHashTable *descriptions;
1535 text_tables = g_settings_schema_source_get_text_tables (key->schema->source);
1536 descriptions = g_hash_table_lookup (text_tables[1], key->schema->id);
1538 return descriptions ? g_hash_table_lookup (descriptions, key->name) : NULL;
1542 * g_settings_schema_key_get_value_type:
1543 * @key: a #GSettingsSchemaKey
1545 * Gets the #GVariantType of @key.
1547 * Returns: (transfer none): the type of @key
1551 const GVariantType *
1552 g_settings_schema_key_get_value_type (GSettingsSchemaKey *key)
1554 g_return_val_if_fail (key, NULL);
1560 * g_settings_schema_key_get_default_value:
1561 * @key: a #GSettingsSchemaKey
1563 * Gets the default value for @key.
1565 * Note that this is the default value according to the schema. System
1566 * administrator defaults and lockdown are not visible via this API.
1568 * Returns: (transfer full): the default value for the key
1573 g_settings_schema_key_get_default_value (GSettingsSchemaKey *key)
1577 g_return_val_if_fail (key, NULL);
1579 value = g_settings_schema_key_get_translated_default (key);
1582 value = g_variant_ref (key->default_value);
1588 * g_settings_schema_key_get_range:
1589 * @key: a #GSettingsSchemaKey
1591 * Queries the range of a key.
1593 * This function will return a #GVariant that fully describes the range
1594 * of values that are valid for @key.
1596 * The type of #GVariant returned is <literal>(sv)</literal>. The
1597 * string describes the type of range restriction in effect. The type
1598 * and meaning of the value contained in the variant depends on the
1601 * If the string is <literal>'type'</literal> then the variant contains
1602 * an empty array. The element type of that empty array is the expected
1603 * type of value and all values of that type are valid.
1605 * If the string is <literal>'enum'</literal> then the variant contains
1606 * an array enumerating the possible values. Each item in the array is
1607 * a possible valid value and no other values are valid.
1609 * If the string is <literal>'flags'</literal> then the variant contains
1610 * an array. Each item in the array is a value that may appear zero or
1611 * one times in an array to be used as the value for this key. For
1612 * example, if the variant contained the array <literal>['x',
1613 * 'y']</literal> then the valid values for the key would be
1614 * <literal>[]</literal>, <literal>['x']</literal>,
1615 * <literal>['y']</literal>, <literal>['x', 'y']</literal> and
1616 * <literal>['y', 'x']</literal>.
1618 * Finally, if the string is <literal>'range'</literal> then the variant
1619 * contains a pair of like-typed values -- the minimum and maximum
1620 * permissible values for this key.
1622 * This information should not be used by normal programs. It is
1623 * considered to be a hint for introspection purposes. Normal programs
1624 * should already know what is permitted by their own schema. The
1625 * format may change in any way in the future -- but particularly, new
1626 * forms may be added to the possibilities described above.
1628 * You should free the returned value with g_variant_unref() when it is
1631 * Returns: (transfer full): a #GVariant describing the range
1636 g_settings_schema_key_get_range (GSettingsSchemaKey *key)
1643 range = g_variant_new ("(**)", key->minimum, key->maximum);
1646 else if (key->strinfo)
1648 range = strinfo_enumerate (key->strinfo, key->strinfo_length);
1649 type = key->is_flags ? "flags" : "enum";
1653 range = g_variant_new_array (key->type, NULL, 0);
1657 return g_variant_ref_sink (g_variant_new ("(sv)", type, range));
1661 * g_settings_schema_key_range_check:
1662 * @key: a #GSettingsSchemaKey
1663 * @value: the value to check
1665 * Checks if the given @value is of the correct type and within the
1666 * permitted range for @key.
1668 * It is a programmer error if @value is not of the correct type -- you
1669 * must check for this first.
1671 * Returns: %TRUE if @value is valid for @key
1676 g_settings_schema_key_range_check (GSettingsSchemaKey *key,
1679 if (key->minimum == NULL && key->strinfo == NULL)
1682 if (g_variant_is_container (value))
1688 g_variant_iter_init (&iter, value);
1689 while (ok && (child = g_variant_iter_next_value (&iter)))
1691 ok = g_settings_schema_key_range_check (key, child);
1692 g_variant_unref (child);
1700 return g_variant_compare (key->minimum, value) <= 0 &&
1701 g_variant_compare (value, key->maximum) <= 0;
1704 return strinfo_is_string_valid (key->strinfo, key->strinfo_length,
1705 g_variant_get_string (value, NULL));