2 * Copyright © 2009, 2010 Codethink Limited
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.
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.
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.
19 * Author: Ryan Lortie <desrt@desrt.ca>
30 #include "gsettings.h"
32 #include "gdelayedsettingsbackend.h"
33 #include "gsettingsbackendinternal.h"
34 #include "gsettings-mapping.h"
35 #include "gio-marshal.h"
36 #include "gsettingsschema.h"
46 * @short_description: a high-level API for application settings
48 * The #GSettings class provides a convenient API for storing and retrieving
49 * application settings.
51 * When creating a GSettings instance, you have to specify a schema
52 * that describes the keys in your settings and their types and default
53 * values, as well as some other information.
55 * Normally, a schema has as fixed path that determines where the settings
56 * are stored in the conceptual global tree of settings. However, schemas
57 * can also be 'relocatable', i.e. not equipped with a fixed path. This is
58 * useful e.g. when the schema describes an 'account', and you want to be
59 * able to store a arbitrary number of accounts.
61 * Unlike other configuration systems (like GConf), GSettings does not
62 * restrict keys to basic types like strings and numbers. GSettings stores
63 * values as #GVariant, and allows any #GVariantType for keys. Key names
64 * are restricted to lowercase characters, numbers and '-'. Furthermore,
65 * the names must begin with a lowercase character, must not end
66 * with a '-', and must not contain consecutive dashes. Key names can
67 * be up to 32 characters long.
69 * Similar to GConf, the default values in GSettings schemas can be
70 * localized, but the localized values are stored in gettext catalogs
71 * and looked up with the domain that is specified in the
72 * <tag class="attribute">gettext-domain</tag> attribute of the
73 * <tag class="starttag">schemalist</tag> or <tag class="starttag">schema</tag>
74 * elements and the category that is specified in the l10n attribute of the
75 * <tag class="starttag">key</tag> element.
77 * GSettings uses schemas in a compact binary form that is created
78 * by the <link linkend="glib-compile-schemas">glib-compile-schemas</link>
79 * utility. The input is a schema description in an XML format that can be
80 * described by the following DTD:
82 * <!ELEMENT schemalist (schema|enum)* >
83 * <!ATTLIST schemalist gettext-domain #IMPLIED >
85 * <!ELEMENT schema (key|child)* >
86 * <!ATTLIST schema id CDATA #REQUIRED
88 * gettext-domain CDATA #IMPLIED >
90 * <!-- defines an enumerated type -->
91 * <!-- each value element maps a nick to a numeric value -->
92 * <!ELEMENT enum (value*) >
93 * <!ATTLIST enum id CDATA #REQUIRED >
94 * <!ELEMENT value EMPTY >
95 * <!-- nick must be at least 2 characters long -->
96 * <!-- value must be parsable as a 32-bit integer -->
97 * <!ELEMENT value nick #REQUIRED
100 * <!ELEMENT key (default|summary?|description?|range?|choices?|aliases?) >
101 * <!-- name can only contain lowercase letters, numbers and '-' -->
102 * <!-- type must be a GVariant type string -->
103 * <!-- enum must be the id of an enum that has been defined earlier -->
104 * <!-- exactly one of enum or type must be given -->
105 * <!ATTLIST key name CDATA #REQUIRED
106 * type CDATA #IMPLIED
107 * enum CDATA #IMPLIED >
109 * <!-- the default value is specified a a serialized GVariant,
110 * i.e. you have to include the quotes when specifying a string -->
111 * <!ELEMENT default (#PCDATA) >
112 * <!-- the presence of the l10n attribute marks a default value for
113 * translation, its value is the gettext category to use -->
114 * <!-- if context is present, it specifies msgctxt to use -->
115 * <!ATTLIST default l10n (messages|time) #IMPLIED
116 * context CDATA #IMPLIED >
118 * <!ELEMENT summary (#PCDATA) >
119 * <!ELEMENT description (#PCDATA) >
121 * <!-- range is only allowed for keys with numeric type -->
122 * <!ELEMENT range EMPTY >
123 * <!-- min and max must be parseable as values of the key type and min < max -->
124 * <!ATTLIST range min CDATA #REQUIRED
125 * max CDATA #REQUIRED >
127 * <!-- choices is only allowed for keys with string or string array type -->
128 * <!ELEMENT choices (choice+) >
129 * <!-- each choice element specifies one possible value -->
130 * <!ELEMENT choice EMPTY >
131 * <!ATTLIST choice value CDATA #REQUIRED >
133 * <!-- aliases is only allowed for keys with enumerated type or with choices -->
134 * <!ELEMENT aliases (alias+) >
135 * <!-- each alias element specifies an alias for one of the possible values -->
136 * <!ELEMENT alias EMPTY >
137 * <!ATTLIST alias value CDATA #REQUIRED
138 * target CDATA #REQUIRED >
140 * <!ELEMENT child EMPTY >
141 * <!ATTLIST child name CDATA #REQUIRED
142 * schema CDATA #REQUIRED >
146 * At runtime, schemas are identified by their id (as specified
147 * in the <tag class="attribute">id</tag> attribute of the
148 * <tag class="starttag">schema</tag> element). The
149 * convention for schema ids is to use a dotted name, similar in
150 * style to a DBus bus name, e.g. "org.gnome.font-rendering".
152 * <example><title>Default values</title>
153 * <programlisting><![CDATA[
155 * <schema id="org.gtk.test" path="/tests/" gettext-domain="test">
157 * <key name="greeting" type="s">
158 * <default l10n="messages">"Hello, earthlings"</default>
159 * <summary>A greeting</summary>
161 * Greeting of the invading martians
165 * <key name="box" type="(ii)">
166 * <default>(20,30)</default>
171 * ]]></programlisting></example>
173 * <example><title>Ranges, choices and enumerated types</title>
174 * <programlisting><![CDATA[
178 * <value nick="first" value="1"/>
179 * <value nick="second" value="2"/>
182 * <schema id="org.gtk.test">
184 * <key name="key-with-range" type="i">
185 * <range min="1" max="100"/>
186 * <default>10</default>
189 * <key name="key-with-choices" type="s">
191 * <choice value='Elisabeth'/>
192 * <choice value='Annabeth'/>
193 * <choice value='Joe'/>
196 * <alias value='Anna' target='Annabeth'/>
197 * <alias value='Beth' target='Elisabeth'/>
199 * <default>'Joe'</default>
202 * <key name='enumerated-key' enum='myenum'>
203 * <default>'first'</default>
208 * ]]></programlisting></example>
211 * <title>Binding</title>
213 * A very convenient feature of GSettings lets you bind #GObject properties
214 * directly to settings, using g_settings_bind(). Once a GObject property
215 * has been bound to a setting, changes on either side are automatically
216 * propagated to the other side. GSettings handles details like
217 * mapping between GObject and GVariant types, and preventing infinite
221 * This makes it very easy to hook up a preferences dialog to the
222 * underlying settings. To make this even more convenient, GSettings
223 * looks for a boolean property with the name "sensitivity" and
224 * automatically binds it to the writability of the bound setting.
225 * If this 'magic' gets in the way, it can be suppressed with the
226 * #G_SETTINGS_BIND_NO_SENSITIVITY flag.
231 struct _GSettingsPrivate
233 /* where the signals go... */
234 GMainContext *main_context;
236 GSettingsBackend *backend;
237 GSettingsSchema *schema;
241 GDelayedSettingsBackend *delayed;
255 SIGNAL_WRITABLE_CHANGE_EVENT,
256 SIGNAL_WRITABLE_CHANGED,
262 static guint g_settings_signals[N_SIGNALS];
264 G_DEFINE_TYPE (GSettings, g_settings, G_TYPE_OBJECT)
268 g_settings_real_change_event (GSettings *settings,
275 keys = g_settings_schema_list (settings->priv->schema, &n_keys);
277 for (i = 0; i < n_keys; i++)
278 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGED],
279 keys[i], g_quark_to_string (keys[i]));
285 g_settings_real_writable_change_event (GSettings *settings,
288 const GQuark *keys = &key;
293 keys = g_settings_schema_list (settings->priv->schema, &n_keys);
295 for (i = 0; i < n_keys; i++)
297 const gchar *string = g_quark_to_string (keys[i]);
299 g_signal_emit (settings, g_settings_signals[SIGNAL_WRITABLE_CHANGED],
301 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGED],
309 settings_backend_changed (GSettingsBackend *backend,
314 GSettings *settings = G_SETTINGS (target);
315 gboolean ignore_this;
318 g_assert (settings->priv->backend == backend);
320 for (i = 0; key[i] == settings->priv->path[i]; i++);
322 if (settings->priv->path[i] == '\0' &&
323 g_settings_schema_has_key (settings->priv->schema, key + i))
327 quark = g_quark_from_string (key + i);
328 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGE_EVENT],
329 0, &quark, 1, &ignore_this);
334 settings_backend_path_changed (GSettingsBackend *backend,
339 GSettings *settings = G_SETTINGS (target);
340 gboolean ignore_this;
342 g_assert (settings->priv->backend == backend);
344 if (g_str_has_prefix (settings->priv->path, path))
345 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGE_EVENT],
346 0, NULL, 0, &ignore_this);
350 settings_backend_keys_changed (GSettingsBackend *backend,
353 const gchar * const *items,
356 GSettings *settings = G_SETTINGS (target);
357 gboolean ignore_this;
360 g_assert (settings->priv->backend == backend);
362 for (i = 0; settings->priv->path[i] &&
363 settings->priv->path[i] == path[i]; i++);
370 for (j = 0; items[j]; j++)
372 const gchar *item = items[j];
375 for (k = 0; item[k] == settings->priv->path[i + k]; k++);
377 if (settings->priv->path[i + k] == '\0' &&
378 g_settings_schema_has_key (settings->priv->schema, item + k))
379 quarks[l++] = g_quark_from_string (item + k);
381 /* "256 quarks ought to be enough for anybody!"
382 * If this bites you, I'm sorry. Please file a bug.
388 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGE_EVENT],
389 0, quarks, l, &ignore_this);
394 settings_backend_writable_changed (GSettingsBackend *backend,
398 GSettings *settings = G_SETTINGS (target);
399 gboolean ignore_this;
402 g_assert (settings->priv->backend == backend);
404 for (i = 0; key[i] == settings->priv->path[i]; i++);
406 if (settings->priv->path[i] == '\0' &&
407 g_settings_schema_has_key (settings->priv->schema, key + i))
408 g_signal_emit (settings, g_settings_signals[SIGNAL_WRITABLE_CHANGE_EVENT],
409 0, g_quark_from_string (key + i), &ignore_this);
413 settings_backend_path_writable_changed (GSettingsBackend *backend,
417 GSettings *settings = G_SETTINGS (target);
418 gboolean ignore_this;
420 g_assert (settings->priv->backend == backend);
422 if (g_str_has_prefix (settings->priv->path, path))
423 g_signal_emit (settings, g_settings_signals[SIGNAL_WRITABLE_CHANGE_EVENT],
424 0, (GQuark) 0, &ignore_this);
427 /* Properties, Construction, Destruction {{{1 */
429 g_settings_set_property (GObject *object,
434 GSettings *settings = G_SETTINGS (object);
439 g_assert (settings->priv->schema_name == NULL);
440 settings->priv->schema_name = g_value_dup_string (value);
444 settings->priv->path = g_value_dup_string (value);
448 settings->priv->backend = g_value_dup_object (value);
452 g_assert_not_reached ();
457 g_settings_get_property (GObject *object,
462 GSettings *settings = G_SETTINGS (object);
467 g_value_set_object (value, settings->priv->schema);
470 case PROP_HAS_UNAPPLIED:
471 g_value_set_boolean (value, g_settings_get_has_unapplied (settings));
475 g_assert_not_reached ();
480 g_settings_constructed (GObject *object)
482 GSettings *settings = G_SETTINGS (object);
483 const gchar *schema_path;
485 settings->priv->schema = g_settings_schema_new (settings->priv->schema_name);
486 schema_path = g_settings_schema_get_path (settings->priv->schema);
488 if (settings->priv->path && schema_path && strcmp (settings->priv->path, schema_path) != 0)
489 g_error ("settings object created with schema '%s' and path '%s', but "
490 "path '%s' is specified by schema",
491 settings->priv->schema_name, settings->priv->path, schema_path);
493 if (settings->priv->path == NULL)
495 if (schema_path == NULL)
496 g_error ("attempting to create schema '%s' without a path",
497 settings->priv->schema_name);
499 settings->priv->path = g_strdup (schema_path);
502 if (settings->priv->backend == NULL)
503 settings->priv->backend = g_settings_backend_get_default ();
505 g_settings_backend_watch (settings->priv->backend, G_OBJECT (settings),
506 settings->priv->main_context,
507 settings_backend_changed,
508 settings_backend_path_changed,
509 settings_backend_keys_changed,
510 settings_backend_writable_changed,
511 settings_backend_path_writable_changed);
512 g_settings_backend_subscribe (settings->priv->backend,
513 settings->priv->path);
517 g_settings_finalize (GObject *object)
519 GSettings *settings = G_SETTINGS (object);
521 g_settings_backend_unsubscribe (settings->priv->backend,
522 settings->priv->path);
523 g_main_context_unref (settings->priv->main_context);
524 g_object_unref (settings->priv->backend);
525 g_object_unref (settings->priv->schema);
526 g_free (settings->priv->schema_name);
527 g_free (settings->priv->path);
531 g_settings_init (GSettings *settings)
533 settings->priv = G_TYPE_INSTANCE_GET_PRIVATE (settings,
537 settings->priv->main_context = g_main_context_get_thread_default ();
539 if (settings->priv->main_context == NULL)
540 settings->priv->main_context = g_main_context_default ();
542 g_main_context_ref (settings->priv->main_context);
546 g_settings_class_init (GSettingsClass *class)
548 GObjectClass *object_class = G_OBJECT_CLASS (class);
550 class->writable_change_event = g_settings_real_writable_change_event;
551 class->change_event = g_settings_real_change_event;
553 object_class->set_property = g_settings_set_property;
554 object_class->get_property = g_settings_get_property;
555 object_class->constructed = g_settings_constructed;
556 object_class->finalize = g_settings_finalize;
558 g_type_class_add_private (object_class, sizeof (GSettingsPrivate));
561 * GSettings::changed:
562 * @settings: the object on which the signal was emitted
563 * @key: the name of the key that changed
565 * The "changed" signal is emitted when a key has potentially changed.
566 * You should call one of the g_settings_get() calls to check the new
569 * This signal supports detailed connections. You can connect to the
570 * detailed signal "changed::x" in order to only receive callbacks
571 * when key "x" changes.
573 g_settings_signals[SIGNAL_CHANGED] =
574 g_signal_new ("changed", G_TYPE_SETTINGS,
575 G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
576 G_STRUCT_OFFSET (GSettingsClass, changed),
577 NULL, NULL, g_cclosure_marshal_VOID__STRING, G_TYPE_NONE,
578 1, G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE);
581 * GSettings::change-event:
582 * @settings: the object on which the signal was emitted
583 * @keys: an array of #GQuark<!-- -->s for the changed keys, or %NULL
584 * @n_keys: the length of the @keys array, or 0
585 * @returns: %TRUE to stop other handlers from being invoked for the
586 * event. FALSE to propagate the event further.
588 * The "change-event" signal is emitted once per change event that
589 * affects this settings object. You should connect to this signal
590 * only if you are interested in viewing groups of changes before they
591 * are split out into multiple emissions of the "changed" signal.
592 * For most use cases it is more appropriate to use the "changed" signal.
594 * In the event that the change event applies to one or more specified
595 * keys, @keys will be an array of #GQuark of length @n_keys. In the
596 * event that the change event applies to the #GSettings object as a
597 * whole (ie: potentially every key has been changed) then @keys will
598 * be %NULL and @n_keys will be 0.
600 * The default handler for this signal invokes the "changed" signal
601 * for each affected key. If any other connected handler returns
602 * %TRUE then this default functionality will be supressed.
604 g_settings_signals[SIGNAL_CHANGE_EVENT] =
605 g_signal_new ("change-event", G_TYPE_SETTINGS,
607 G_STRUCT_OFFSET (GSettingsClass, change_event),
608 g_signal_accumulator_true_handled, NULL,
609 _gio_marshal_BOOL__POINTER_INT,
610 G_TYPE_BOOLEAN, 2, G_TYPE_POINTER, G_TYPE_INT);
613 * GSettings::writable-changed:
614 * @settings: the object on which the signal was emitted
617 * The "writable-changed" signal is emitted when the writability of a
618 * key has potentially changed. You should call
619 * g_settings_is_writable() in order to determine the new status.
621 * This signal supports detailed connections. You can connect to the
622 * detailed signal "writable-changed::x" in order to only receive
623 * callbacks when the writability of "x" changes.
625 g_settings_signals[SIGNAL_WRITABLE_CHANGED] =
626 g_signal_new ("writable-changed", G_TYPE_SETTINGS,
627 G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
628 G_STRUCT_OFFSET (GSettingsClass, changed),
629 NULL, NULL, g_cclosure_marshal_VOID__STRING, G_TYPE_NONE,
630 1, G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE);
633 * GSettings::writable-change-event:
634 * @settings: the object on which the signal was emitted
635 * @key: the quark of the key, or 0
636 * @returns: %TRUE to stop other handlers from being invoked for the
637 * event. FALSE to propagate the event further.
639 * The "writable-change-event" signal is emitted once per writability
640 * change event that affects this settings object. You should connect
641 * to this signal if you are interested in viewing groups of changes
642 * before they are split out into multiple emissions of the
643 * "writable-changed" signal. For most use cases it is more
644 * appropriate to use the "writable-changed" signal.
646 * In the event that the writability change applies only to a single
647 * key, @key will be set to the #GQuark for that key. In the event
648 * that the writability change affects the entire settings object,
651 * The default handler for this signal invokes the "writable-changed"
652 * and "changed" signals for each affected key. This is done because
653 * changes in writability might also imply changes in value (if for
654 * example, a new mandatory setting is introduced). If any other
655 * connected handler returns %TRUE then this default functionality
658 g_settings_signals[SIGNAL_WRITABLE_CHANGE_EVENT] =
659 g_signal_new ("writable-change-event", G_TYPE_SETTINGS,
661 G_STRUCT_OFFSET (GSettingsClass, writable_change_event),
662 g_signal_accumulator_true_handled, NULL,
663 _gio_marshal_BOOLEAN__UINT, G_TYPE_BOOLEAN, 1, G_TYPE_UINT);
668 * The name of the context that the settings are stored in.
670 g_object_class_install_property (object_class, PROP_BACKEND,
671 g_param_spec_object ("backend",
672 P_("GSettingsBackend"),
673 P_("The GSettingsBackend for this settings object"),
674 G_TYPE_SETTINGS_BACKEND, G_PARAM_CONSTRUCT_ONLY |
675 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
680 * The name of the schema that describes the types of keys
681 * for this #GSettings object.
683 g_object_class_install_property (object_class, PROP_SCHEMA,
684 g_param_spec_string ("schema",
686 P_("The name of the schema for this settings object"),
688 G_PARAM_CONSTRUCT_ONLY |
689 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
694 * The path within the backend where the settings are stored.
696 g_object_class_install_property (object_class, PROP_PATH,
697 g_param_spec_string ("path",
699 P_("The path within the backend where the settings are"),
701 G_PARAM_CONSTRUCT_ONLY |
702 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
705 * GSettings:has-unapplied:
707 * If this property is %TRUE, the #GSettings object has outstanding
708 * changes that will be applied when g_settings_apply() is called.
710 g_object_class_install_property (object_class, PROP_HAS_UNAPPLIED,
711 g_param_spec_boolean ("has-unapplied",
712 P_("Has unapplied changes"),
713 P_("TRUE if there are outstanding changes to apply()"),
715 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
719 /* Construction (new, new_with_path, etc.) {{{1 */
722 * @schema: the name of the schema
723 * @returns: a new #GSettings object
725 * Creates a new #GSettings object with a given schema.
727 * Signals on the newly created #GSettings object will be dispatched
728 * via the thread-default #GMainContext in effect at the time of the
729 * call to g_settings_new(). The new #GSettings will hold a reference
730 * on the context. See g_main_context_push_thread_default().
735 g_settings_new (const gchar *schema)
737 g_return_val_if_fail (schema != NULL, NULL);
739 return g_object_new (G_TYPE_SETTINGS,
745 * g_settings_new_with_path:
746 * @schema: the name of the schema
747 * @path: the path to use
748 * @returns: a new #GSettings object
750 * Creates a new #GSettings object with a given schema and path.
752 * You only need to do this if you want to directly create a settings
753 * object with a schema that doesn't have a specified path of its own.
756 * It is a programmer error to call this function for a schema that
757 * has an explicitly specified path.
762 g_settings_new_with_path (const gchar *schema,
765 g_return_val_if_fail (schema != NULL, NULL);
766 g_return_val_if_fail (path != NULL, NULL);
768 return g_object_new (G_TYPE_SETTINGS,
775 * g_settings_new_with_backend:
776 * @schema: the name of the schema
777 * @backend: the #GSettingsBackend to use
778 * @returns: a new #GSettings object
780 * Creates a new #GSettings object with a given schema and backend.
782 * Creating settings objects with an different backend allows accessing settings
783 * from a database other than the usual one. For example, it may make
784 * sense to pass a backend corresponding to the "defaults" settings database on
785 * the system to get a settings object that modifies the system default
786 * settings instead of the settings for this user.
791 g_settings_new_with_backend (const gchar *schema,
792 GSettingsBackend *backend)
794 g_return_val_if_fail (schema != NULL, NULL);
795 g_return_val_if_fail (G_IS_SETTINGS_BACKEND (backend), NULL);
797 return g_object_new (G_TYPE_SETTINGS,
804 * g_settings_new_with_backend_and_path:
805 * @schema: the name of the schema
806 * @backend: the #GSettingsBackend to use
807 * @path: the path to use
808 * @returns: a new #GSettings object
810 * Creates a new #GSettings object with a given schema, backend and
813 * This is a mix of g_settings_new_with_backend() and
814 * g_settings_new_with_path().
819 g_settings_new_with_backend_and_path (const gchar *schema,
820 GSettingsBackend *backend,
823 g_return_val_if_fail (schema != NULL, NULL);
824 g_return_val_if_fail (G_IS_SETTINGS_BACKEND (backend), NULL);
825 g_return_val_if_fail (path != NULL, NULL);
827 return g_object_new (G_TYPE_SETTINGS,
834 /* Internal read/write utilities, enum/flags conversion, validation {{{1 */
840 GSettingsSchema *schema;
845 const guint32 *strinfo;
846 gsize strinfo_length;
848 const gchar *unparsed;
851 const GVariantType *type;
852 GVariant *minimum, *maximum;
853 GVariant *default_value;
857 g_settings_get_key_info (GSettingsKeyInfo *info,
865 memset (info, 0, sizeof *info);
867 iter = g_settings_schema_get_value (settings->priv->schema, key);
869 info->default_value = g_variant_iter_next_value (iter);
870 info->type = g_variant_get_type (info->default_value);
871 info->settings = g_object_ref (settings);
872 info->key = g_intern_string (key);
874 while (g_variant_iter_next (iter, "(y*)", &code, &data))
879 /* translation requested */
880 g_variant_get (data, "(y&s)", &info->lc_char, &info->unparsed);
884 /* enumerated types... */
885 info->is_enum = TRUE;
890 info->is_flags = TRUE;
894 /* ..., choices, aliases */
895 info->strinfo = g_variant_get_fixed_array (data,
896 &info->strinfo_length,
901 g_variant_get (data, "(**)", &info->minimum, &info->maximum);
905 g_warning ("unknown schema extension '%c'", code);
909 g_variant_unref (data);
912 g_variant_iter_free (iter);
916 g_settings_free_key_info (GSettingsKeyInfo *info)
919 g_variant_unref (info->minimum);
922 g_variant_unref (info->maximum);
924 g_variant_unref (info->default_value);
925 g_object_unref (info->settings);
929 g_settings_write_to_backend (GSettingsKeyInfo *info,
935 path = g_strconcat (info->settings->priv->path, info->key, NULL);
936 success = g_settings_backend_write (info->settings->priv->backend,
944 g_settings_type_check (GSettingsKeyInfo *info,
947 g_return_val_if_fail (value != NULL, FALSE);
949 return g_variant_is_of_type (value, info->type);
953 g_settings_range_check (GSettingsKeyInfo *info,
956 if (info->minimum == NULL && info->strinfo == NULL)
959 if (g_variant_is_container (value))
965 g_variant_iter_init (&iter, value);
966 while (ok && (child = g_variant_iter_next_value (&iter)))
968 ok = g_settings_range_check (info, child);
969 g_variant_unref (child);
977 return g_variant_compare (info->minimum, value) <= 0 &&
978 g_variant_compare (value, info->maximum) <= 0;
981 return strinfo_is_string_valid (info->strinfo,
982 info->strinfo_length,
983 g_variant_get_string (value, NULL));
987 g_settings_range_fixup (GSettingsKeyInfo *info,
992 if (g_settings_range_check (info, value))
993 return g_variant_ref (value);
995 if (info->strinfo == NULL)
998 if (g_variant_is_container (value))
1000 GVariantBuilder builder;
1004 g_variant_iter_init (&iter, value);
1005 g_variant_builder_init (&builder, g_variant_get_type (value));
1007 while ((child = g_variant_iter_next_value (&iter)))
1011 fixed = g_settings_range_fixup (info, child);
1012 g_variant_unref (child);
1016 g_variant_builder_clear (&builder);
1020 g_variant_builder_add_value (&builder, fixed);
1021 g_variant_unref (fixed);
1024 return g_variant_ref_sink (g_variant_builder_end (&builder));
1027 target = strinfo_string_from_alias (info->strinfo, info->strinfo_length,
1028 g_variant_get_string (value, NULL));
1029 return target ? g_variant_ref_sink (g_variant_new_string (target)) : NULL;
1033 g_settings_read_from_backend (GSettingsKeyInfo *info)
1039 path = g_strconcat (info->settings->priv->path, info->key, NULL);
1040 value = g_settings_backend_read (info->settings->priv->backend,
1041 path, info->type, FALSE);
1046 fixup = g_settings_range_fixup (info, value);
1047 g_variant_unref (value);
1056 g_settings_get_translated_default (GSettingsKeyInfo *info)
1058 const gchar *translated;
1059 GError *error = NULL;
1060 const gchar *domain;
1063 if (info->lc_char == '\0')
1064 /* translation not requested for this key */
1067 domain = g_settings_schema_get_gettext_domain (info->settings->priv->schema);
1069 if (info->lc_char == 't')
1070 translated = g_dcgettext (domain, info->unparsed, LC_TIME);
1072 translated = g_dgettext (domain, info->unparsed);
1074 if (translated == info->unparsed)
1075 /* the default value was not translated */
1078 /* try to parse the translation of the unparsed default */
1079 value = g_variant_parse (info->type, translated, NULL, NULL, &error);
1083 g_warning ("Failed to parse translated string `%s' for "
1084 "key `%s' in schema `%s': %s", info->unparsed, info->key,
1085 info->settings->priv->schema_name, error->message);
1086 g_warning ("Using untranslated default instead.");
1087 g_error_free (error);
1090 else if (!g_settings_range_check (info, value))
1092 g_warning ("Translated default `%s' for key `%s' in schema `%s' "
1093 "is outside of valid range", info->unparsed, info->key,
1094 info->settings->priv->schema_name);
1095 g_variant_unref (value);
1103 g_settings_to_enum (GSettingsKeyInfo *info,
1109 it_worked = strinfo_enum_from_string (info->strinfo, info->strinfo_length,
1110 g_variant_get_string (value, NULL),
1113 /* 'value' can only come from the backend after being filtered for validity,
1114 * from the translation after being filtered for validity, or from the schema
1115 * itself (which the schema compiler checks for validity). If this assertion
1116 * fails then it's really a bug in GSettings or the schema compiler...
1118 g_assert (it_worked);
1124 g_settings_from_enum (GSettingsKeyInfo *info,
1127 const gchar *string;
1129 string = strinfo_string_from_enum (info->strinfo,
1130 info->strinfo_length,
1136 return g_variant_new_string (string);
1140 g_settings_to_flags (GSettingsKeyInfo *info,
1148 g_variant_iter_init (&iter, value);
1149 while (g_variant_iter_next (&iter, "&s", &flag))
1154 it_worked = strinfo_enum_from_string (info->strinfo,
1155 info->strinfo_length,
1157 /* as in g_settings_to_enum() */
1158 g_assert (it_worked);
1160 result |= flag_value;
1167 g_settings_from_flags (GSettingsKeyInfo *info,
1170 GVariantBuilder builder;
1173 g_variant_builder_init (&builder, G_VARIANT_TYPE ("as"));
1175 for (i = 0; i < 32; i++)
1176 if (value & (1u << i))
1178 const gchar *string;
1180 string = strinfo_string_from_enum (info->strinfo,
1181 info->strinfo_length,
1186 g_variant_builder_clear (&builder);
1190 g_variant_builder_add (&builder, "s", string);
1193 return g_variant_builder_end (&builder);
1196 /* Public Get/Set API {{{1 (get, get_value, set, set_value, get_mapped) */
1198 * g_settings_get_value:
1199 * @settings: a #GSettings object
1200 * @key: the key to get the value for
1201 * @returns: a new #GVariant
1203 * Gets the value that is stored in @settings for @key.
1205 * It is a programmer error to give a @key that isn't contained in the
1206 * schema for @settings.
1211 g_settings_get_value (GSettings *settings,
1214 GSettingsKeyInfo info;
1217 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
1218 g_return_val_if_fail (key != NULL, NULL);
1220 g_settings_get_key_info (&info, settings, key);
1221 value = g_settings_read_from_backend (&info);
1224 value = g_settings_get_translated_default (&info);
1227 value = g_variant_ref (info.default_value);
1229 g_settings_free_key_info (&info);
1235 * g_settings_get_enum:
1236 * @settings: a #GSettings object
1237 * @key: the key to get the value for
1238 * @returns: the enum value
1240 * Gets the value that is stored in @settings for @key and converts it
1241 * to the enum value that it represents.
1243 * In order to use this function the type of the value must be a string
1244 * and it must be marked in the schema file as an enumerated type.
1246 * It is a programmer error to give a @key that isn't contained in the
1247 * schema for @settings or is not marked as an enumerated type.
1249 * If the value stored in the configuration database is not a valid
1250 * value for the enumerated type then this function will return the
1256 g_settings_get_enum (GSettings *settings,
1259 GSettingsKeyInfo info;
1263 g_return_val_if_fail (G_IS_SETTINGS (settings), -1);
1264 g_return_val_if_fail (key != NULL, -1);
1266 g_settings_get_key_info (&info, settings, key);
1270 g_critical ("g_settings_get_enum() called on key `%s' which is not "
1271 "associated with an enumerated type", info.key);
1272 g_settings_free_key_info (&info);
1276 value = g_settings_read_from_backend (&info);
1279 value = g_settings_get_translated_default (&info);
1282 value = g_variant_ref (info.default_value);
1284 result = g_settings_to_enum (&info, value);
1285 g_settings_free_key_info (&info);
1286 g_variant_unref (value);
1292 * g_settings_set_enum:
1293 * @settings: a #GSettings object
1294 * @key: a key, within @settings
1295 * @value: an enumerated value
1296 * @returns: %TRUE, if the set succeeds
1298 * Looks up the enumerated type nick for @value and writes it to @key,
1301 * It is a programmer error to give a @key that isn't contained in the
1302 * schema for @settings or is not marked as an enumerated type, or for
1303 * @value not to be a valid value for the named type.
1305 * After performing the write, accessing @key directly with
1306 * g_settings_get_string() will return the 'nick' associated with
1310 g_settings_set_enum (GSettings *settings,
1314 GSettingsKeyInfo info;
1318 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
1319 g_return_val_if_fail (key != NULL, FALSE);
1321 g_settings_get_key_info (&info, settings, key);
1325 g_critical ("g_settings_set_enum() called on key `%s' which is not "
1326 "associated with an enumerated type", info.key);
1330 if (!(variant = g_settings_from_enum (&info, value)))
1332 g_critical ("g_settings_set_enum(): invalid enum value %d for key `%s' "
1333 "in schema `%s'. Doing nothing.", value, info.key,
1334 info.settings->priv->schema_name);
1335 g_settings_free_key_info (&info);
1339 success = g_settings_write_to_backend (&info, variant);
1340 g_settings_free_key_info (&info);
1346 * g_settings_get_flags:
1347 * @settings: a #GSettings object
1348 * @key: the key to get the value for
1349 * @returns: the flags value
1351 * Gets the value that is stored in @settings for @key and converts it
1352 * to the flags value that it represents.
1354 * In order to use this function the type of the value must be an array
1355 * of strings and it must be marked in the schema file as an flags type.
1357 * It is a programmer error to give a @key that isn't contained in the
1358 * schema for @settings or is not marked as a flags type.
1360 * If the value stored in the configuration database is not a valid
1361 * value for the flags type then this function will return the default
1367 g_settings_get_flags (GSettings *settings,
1370 GSettingsKeyInfo info;
1374 g_return_val_if_fail (G_IS_SETTINGS (settings), -1);
1375 g_return_val_if_fail (key != NULL, -1);
1377 g_settings_get_key_info (&info, settings, key);
1381 g_critical ("g_settings_get_flags() called on key `%s' which is not "
1382 "associated with a flags type", info.key);
1383 g_settings_free_key_info (&info);
1387 value = g_settings_read_from_backend (&info);
1390 value = g_settings_get_translated_default (&info);
1393 value = g_variant_ref (info.default_value);
1395 result = g_settings_to_flags (&info, value);
1396 g_settings_free_key_info (&info);
1397 g_variant_unref (value);
1403 * g_settings_set_flags:
1404 * @settings: a #GSettings object
1405 * @key: a key, within @settings
1406 * @value: a flags value
1407 * @returns: %TRUE, if the set succeeds
1409 * Looks up the flags type nicks for the bits specified by @value, puts
1410 * them in an array of strings and writes the array to @key, withing
1413 * It is a programmer error to give a @key that isn't contained in the
1414 * schema for @settings or is not marked as a flags type, or for @value
1415 * to contain any bits that are not value for the named type.
1417 * After performing the write, accessing @key directly with
1418 * g_settings_get_strv() will return an array of 'nicks'; one for each
1422 g_settings_set_flags (GSettings *settings,
1426 GSettingsKeyInfo info;
1430 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
1431 g_return_val_if_fail (key != NULL, FALSE);
1433 g_settings_get_key_info (&info, settings, key);
1437 g_critical ("g_settings_set_flags() called on key `%s' which is not "
1438 "associated with a flags type", info.key);
1442 if (!(variant = g_settings_from_flags (&info, value)))
1444 g_critical ("g_settings_set_flags(): invalid flags value 0x%08x "
1445 "for key `%s' in schema `%s'. Doing nothing.",
1446 value, info.key, info.settings->priv->schema_name);
1447 g_settings_free_key_info (&info);
1451 success = g_settings_write_to_backend (&info, variant);
1452 g_settings_free_key_info (&info);
1458 * g_settings_set_value:
1459 * @settings: a #GSettings object
1460 * @key: the name of the key to set
1461 * @value: a #GVariant of the correct type
1462 * @returns: %TRUE if setting the key succeeded,
1463 * %FALSE if the key was not writable
1465 * Sets @key in @settings to @value.
1467 * It is a programmer error to give a @key that isn't contained in the
1468 * schema for @settings or for @value to have the incorrect type, per
1471 * If @value is floating then this function consumes the reference.
1476 g_settings_set_value (GSettings *settings,
1480 GSettingsKeyInfo info;
1482 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
1483 g_return_val_if_fail (key != NULL, FALSE);
1485 g_settings_get_key_info (&info, settings, key);
1486 g_return_val_if_fail (g_settings_type_check (&info, value), FALSE);
1487 g_return_val_if_fail (g_settings_range_check (&info, value), FALSE);
1488 g_settings_free_key_info (&info);
1490 return g_settings_write_to_backend (&info, value);
1495 * @settings: a #GSettings object
1496 * @key: the key to get the value for
1497 * @format: a #GVariant format string
1498 * @...: arguments as per @format
1500 * Gets the value that is stored at @key in @settings.
1502 * A convenience function that combines g_settings_get_value() with
1505 * It is a programmer error to give a @key that isn't contained in the
1506 * schema for @settings or for the #GVariantType of @format to mismatch
1507 * the type given in the schema.
1512 g_settings_get (GSettings *settings,
1514 const gchar *format,
1520 value = g_settings_get_value (settings, key);
1522 va_start (ap, format);
1523 g_variant_get_va (value, format, NULL, &ap);
1526 g_variant_unref (value);
1531 * @settings: a #GSettings object
1532 * @key: the name of the key to set
1533 * @format: a #GVariant format string
1534 * @...: arguments as per @format
1535 * @returns: %TRUE if setting the key succeeded,
1536 * %FALSE if the key was not writable
1538 * Sets @key in @settings to @value.
1540 * A convenience function that combines g_settings_set_value() with
1543 * It is a programmer error to give a @key that isn't contained in the
1544 * schema for @settings or for the #GVariantType of @format to mismatch
1545 * the type given in the schema.
1550 g_settings_set (GSettings *settings,
1552 const gchar *format,
1558 va_start (ap, format);
1559 value = g_variant_new_va (format, NULL, &ap);
1562 return g_settings_set_value (settings, key, value);
1566 * g_settings_get_mapped:
1567 * @settings: a #GSettings object
1568 * @key: the key to get the value for
1569 * @mapping: the function to map the value in the settings database to
1570 * the value used by the application
1571 * @user_data: user data for @mapping
1573 * Gets the value that is stored at @key in @settings, subject to
1574 * application-level validation/mapping.
1576 * You should use this function when the application needs to perform
1577 * some processing on the value of the key (for example, parsing). The
1578 * @mapping function performs that processing. If the function
1579 * indicates that the processing was unsuccessful (due to a parse error,
1580 * for example) then the mapping is tried again with another value.
1582 * This allows a robust 'fall back to defaults' behaviour to be
1583 * implemented somewhat automatically.
1585 * The first value that is tried is the user's setting for the key. If
1586 * the mapping function fails to map this value, other values may be
1587 * tried in an unspecified order (system or site defaults, translated
1588 * schema default values, untranslated schema default values, etc).
1590 * If the mapping function fails for all possible values, one additional
1591 * attempt is made: the mapping function is called with a %NULL value.
1592 * If the mapping function still indicates failure at this point then
1593 * the application will be aborted.
1595 * The result parameter for the @mapping function is pointed to a
1596 * #gpointer which is initially set to %NULL. The same pointer is given
1597 * to each invocation of @mapping. The final value of that #gpointer is
1598 * what is returned by this function. %NULL is valid; it is returned
1599 * just as any other value would be.
1602 g_settings_get_mapped (GSettings *settings,
1604 GSettingsGetMapping mapping,
1607 gpointer result = NULL;
1608 GSettingsKeyInfo info;
1612 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
1613 g_return_val_if_fail (key != NULL, NULL);
1614 g_return_val_if_fail (mapping != NULL, NULL);
1616 g_settings_get_key_info (&info, settings, key);
1618 if ((value = g_settings_read_from_backend (&info)))
1620 okay = mapping (value, &result, user_data);
1621 g_variant_unref (value);
1622 if (okay) goto okay;
1625 if ((value = g_settings_get_translated_default (&info)))
1627 okay = mapping (value, &result, user_data);
1628 g_variant_unref (value);
1629 if (okay) goto okay;
1632 if (mapping (info.default_value, &result, user_data))
1635 if (!mapping (NULL, &result, user_data))
1636 g_error ("The mapping function given to g_settings_get_mapped() for key "
1637 "`%s' in schema `%s' returned FALSE when given a NULL value.",
1638 key, settings->priv->schema_name);
1641 g_settings_free_key_info (&info);
1646 /* Convenience API (get, set_string, int, double, boolean, strv) {{{1 */
1648 * g_settings_get_string:
1649 * @settings: a #GSettings object
1650 * @key: the key to get the value for
1651 * @returns: a newly-allocated string
1653 * Gets the value that is stored at @key in @settings.
1655 * A convenience variant of g_settings_get() for strings.
1657 * It is a programmer error to give a @key that isn't specified as
1658 * having a string type in the schema for @settings.
1663 g_settings_get_string (GSettings *settings,
1669 value = g_settings_get_value (settings, key);
1670 result = g_variant_dup_string (value, NULL);
1671 g_variant_unref (value);
1677 * g_settings_set_string:
1678 * @settings: a #GSettings object
1679 * @key: the name of the key to set
1680 * @value: the value to set it to
1681 * @returns: %TRUE if setting the key succeeded,
1682 * %FALSE if the key was not writable
1684 * Sets @key in @settings to @value.
1686 * A convenience variant of g_settings_set() for strings.
1688 * It is a programmer error to give a @key that isn't specified as
1689 * having a string type in the schema for @settings.
1694 g_settings_set_string (GSettings *settings,
1698 return g_settings_set_value (settings, key, g_variant_new_string (value));
1702 * g_settings_get_int:
1703 * @settings: a #GSettings object
1704 * @key: the key to get the value for
1705 * @returns: an integer
1707 * Gets the value that is stored at @key in @settings.
1709 * A convenience variant of g_settings_get() for 32-bit integers.
1711 * It is a programmer error to give a @key that isn't specified as
1712 * having a int32 type in the schema for @settings.
1717 g_settings_get_int (GSettings *settings,
1723 value = g_settings_get_value (settings, key);
1724 result = g_variant_get_int32 (value);
1725 g_variant_unref (value);
1731 * g_settings_set_int:
1732 * @settings: a #GSettings object
1733 * @key: the name of the key to set
1734 * @value: the value to set it to
1735 * @returns: %TRUE if setting the key succeeded,
1736 * %FALSE if the key was not writable
1738 * Sets @key in @settings to @value.
1740 * A convenience variant of g_settings_set() for 32-bit integers.
1742 * It is a programmer error to give a @key that isn't specified as
1743 * having a int32 type in the schema for @settings.
1748 g_settings_set_int (GSettings *settings,
1752 return g_settings_set_value (settings, key, g_variant_new_int32 (value));
1756 * g_settings_get_double:
1757 * @settings: a #GSettings object
1758 * @key: the key to get the value for
1759 * @returns: a double
1761 * Gets the value that is stored at @key in @settings.
1763 * A convenience variant of g_settings_get() for doubles.
1765 * It is a programmer error to give a @key that isn't specified as
1766 * having a 'double' type in the schema for @settings.
1771 g_settings_get_double (GSettings *settings,
1777 value = g_settings_get_value (settings, key);
1778 result = g_variant_get_double (value);
1779 g_variant_unref (value);
1785 * g_settings_set_double:
1786 * @settings: a #GSettings object
1787 * @key: the name of the key to set
1788 * @value: the value to set it to
1789 * @returns: %TRUE if setting the key succeeded,
1790 * %FALSE if the key was not writable
1792 * Sets @key in @settings to @value.
1794 * A convenience variant of g_settings_set() for doubles.
1796 * It is a programmer error to give a @key that isn't specified as
1797 * having a 'double' type in the schema for @settings.
1802 g_settings_set_double (GSettings *settings,
1806 return g_settings_set_value (settings, key, g_variant_new_double (value));
1810 * g_settings_get_boolean:
1811 * @settings: a #GSettings object
1812 * @key: the key to get the value for
1813 * @returns: a boolean
1815 * Gets the value that is stored at @key in @settings.
1817 * A convenience variant of g_settings_get() for booleans.
1819 * It is a programmer error to give a @key that isn't specified as
1820 * having a boolean type in the schema for @settings.
1825 g_settings_get_boolean (GSettings *settings,
1831 value = g_settings_get_value (settings, key);
1832 result = g_variant_get_boolean (value);
1833 g_variant_unref (value);
1839 * g_settings_set_boolean:
1840 * @settings: a #GSettings object
1841 * @key: the name of the key to set
1842 * @value: the value to set it to
1843 * @returns: %TRUE if setting the key succeeded,
1844 * %FALSE if the key was not writable
1846 * Sets @key in @settings to @value.
1848 * A convenience variant of g_settings_set() for booleans.
1850 * It is a programmer error to give a @key that isn't specified as
1851 * having a boolean type in the schema for @settings.
1856 g_settings_set_boolean (GSettings *settings,
1860 return g_settings_set_value (settings, key, g_variant_new_boolean (value));
1864 * g_settings_get_strv:
1865 * @settings: a #GSettings object
1866 * @key: the key to get the value for
1867 * @returns: a newly-allocated, %NULL-terminated array of strings
1869 * Gets the value that is stored at @key in @settings.
1871 * A convenience variant of g_settings_get() for string arrays.
1873 * It is a programmer error to give a @key that isn't specified as
1874 * having an array of strings type in the schema for @settings.
1879 g_settings_get_strv (GSettings *settings,
1885 value = g_settings_get_value (settings, key);
1886 result = g_variant_dup_strv (value, NULL);
1887 g_variant_unref (value);
1893 * g_settings_set_strv:
1894 * @settings: a #GSettings object
1895 * @key: the name of the key to set
1896 * @value: (allow-none): the value to set it to, or %NULL
1897 * @returns: %TRUE if setting the key succeeded,
1898 * %FALSE if the key was not writable
1900 * Sets @key in @settings to @value.
1902 * A convenience variant of g_settings_set() for string arrays. If
1903 * @value is %NULL, then @key is set to be the empty array.
1905 * It is a programmer error to give a @key that isn't specified as
1906 * having an array of strings type in the schema for @settings.
1911 g_settings_set_strv (GSettings *settings,
1913 const gchar * const *value)
1918 array = g_variant_new_strv (value, -1);
1920 array = g_variant_new_strv (NULL, 0);
1922 return g_settings_set_value (settings, key, array);
1925 /* Delayed apply (delay, apply, revert, get_has_unapplied) {{{1 */
1928 * @settings: a #GSettings object
1930 * Changes the #GSettings object into 'delay-apply' mode. In this
1931 * mode, changes to @settings are not immediately propagated to the
1932 * backend, but kept locally until g_settings_apply() is called.
1937 g_settings_delay (GSettings *settings)
1939 g_return_if_fail (G_IS_SETTINGS (settings));
1941 if (settings->priv->delayed)
1944 settings->priv->delayed =
1945 g_delayed_settings_backend_new (settings->priv->backend,
1947 settings->priv->main_context);
1948 g_settings_backend_unwatch (settings->priv->backend, G_OBJECT (settings));
1949 g_object_unref (settings->priv->backend);
1951 settings->priv->backend = G_SETTINGS_BACKEND (settings->priv->delayed);
1952 g_settings_backend_watch (settings->priv->backend, G_OBJECT (settings),
1953 settings->priv->main_context,
1954 settings_backend_changed,
1955 settings_backend_path_changed,
1956 settings_backend_keys_changed,
1957 settings_backend_writable_changed,
1958 settings_backend_path_writable_changed);
1963 * @settings: a #GSettings instance
1965 * Applies any changes that have been made to the settings. This
1966 * function does nothing unless @settings is in 'delay-apply' mode;
1967 * see g_settings_set_delay_apply(). In the normal case settings are
1968 * always applied immediately.
1971 g_settings_apply (GSettings *settings)
1973 if (settings->priv->delayed)
1975 GDelayedSettingsBackend *delayed;
1977 delayed = G_DELAYED_SETTINGS_BACKEND (settings->priv->backend);
1978 g_delayed_settings_backend_apply (delayed);
1983 * g_settings_revert:
1984 * @settings: a #GSettings instance
1986 * Reverts all non-applied changes to the settings. This function
1987 * does nothing unless @settings is in 'delay-apply' mode; see
1988 * g_settings_set_delay_apply(). In the normal case settings are
1989 * always applied immediately.
1991 * Change notifications will be emitted for affected keys.
1994 g_settings_revert (GSettings *settings)
1996 if (settings->priv->delayed)
1998 GDelayedSettingsBackend *delayed;
2000 delayed = G_DELAYED_SETTINGS_BACKEND (settings->priv->backend);
2001 g_delayed_settings_backend_revert (delayed);
2006 * g_settings_get_has_unapplied:
2007 * @settings: a #GSettings object
2008 * @returns: %TRUE if @settings has unapplied changes
2010 * Returns whether the #GSettings object has any unapplied
2011 * changes. This can only be the case if it is in 'delayed-apply' mode.
2016 g_settings_get_has_unapplied (GSettings *settings)
2018 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
2020 return settings->priv->delayed &&
2021 g_delayed_settings_backend_get_has_unapplied (
2022 G_DELAYED_SETTINGS_BACKEND (settings->priv->backend));
2025 /* Extra API (sync, get_child, is_writable, list_items) {{{1 */
2028 * @context: the context to sync, or %NULL
2030 * Ensures that all pending operations for the given context are
2033 * Writes made to a #GSettings are handled asynchronously. For this
2034 * reason, it is very unlikely that the changes have it to disk by the
2035 * time g_settings_set() returns.
2037 * This call will block until all of the writes have made it to the
2038 * backend. Since the mainloop is not running, no change notifications
2039 * will be dispatched during this call (but some may be queued by the
2040 * time the call is done).
2043 g_settings_sync (void)
2045 g_settings_backend_sync_default ();
2049 * g_settings_is_writable:
2050 * @settings: a #GSettings object
2051 * @name: the name of a key
2052 * @returns: %TRUE if the key @name is writable
2054 * Finds out if a key can be written or not
2059 g_settings_is_writable (GSettings *settings,
2065 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
2067 path = g_strconcat (settings->priv->path, name, NULL);
2068 writable = g_settings_backend_get_writable (settings->priv->backend, path);
2075 * g_settings_get_child:
2076 * @settings: a #GSettings object
2077 * @name: the name of the 'child' schema
2078 * @returns: a 'child' settings object
2080 * Creates a 'child' settings object which has a base path of
2081 * <replaceable>base-path</replaceable>/@name", where
2082 * <replaceable>base-path</replaceable> is the base path of @settings.
2084 * The schema for the child settings object must have been declared
2085 * in the schema of @settings using a <tag class="starttag">child</tag> element.
2090 g_settings_get_child (GSettings *settings,
2093 const gchar *child_schema;
2098 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
2100 child_name = g_strconcat (name, "/", NULL);
2101 child_schema = g_settings_schema_get_string (settings->priv->schema,
2103 if (child_schema == NULL)
2104 g_error ("Schema '%s' has no child '%s'",
2105 settings->priv->schema_name, name);
2107 child_path = g_strconcat (settings->priv->path, child_name, NULL);
2108 child = g_object_new (G_TYPE_SETTINGS,
2109 "schema", child_schema,
2112 g_free (child_path);
2113 g_free (child_name);
2119 * g_settings_list_items:
2120 * @settings: a #GSettings object
2121 * Returns: a list of the keys on @settings
2123 * Introspects the list of keys and children on @settings.
2125 * The list that is returned is a mix of the keys and children. The
2126 * names of the children are suffixed with '/'. The names of the keys
2129 * You should probably not be calling this function from "normal" code
2130 * (since you should already know what keys are in your schema). This
2131 * function is intended for introspection reasons.
2133 * You should free the return value with g_free() when you are done with
2137 g_settings_list_items (GSettings *settings)
2144 keys = g_settings_schema_list (settings->priv->schema, &n_keys);
2145 strv = g_new (const gchar *, n_keys + 1);
2146 for (i = 0; i < n_keys; i++)
2147 strv[i] = g_quark_to_string (keys[i]);
2156 GSettingsKeyInfo info;
2159 GSettingsBindGetMapping get_mapping;
2160 GSettingsBindSetMapping set_mapping;
2162 GDestroyNotify destroy;
2164 guint writable_handler_id;
2165 guint property_handler_id;
2166 const GParamSpec *property;
2167 guint key_handler_id;
2169 /* prevent recursion */
2174 g_settings_binding_free (gpointer data)
2176 GSettingsBinding *binding = data;
2178 g_assert (!binding->running);
2180 if (binding->writable_handler_id)
2181 g_signal_handler_disconnect (binding->info.settings,
2182 binding->writable_handler_id);
2184 if (binding->key_handler_id)
2185 g_signal_handler_disconnect (binding->info.settings,
2186 binding->key_handler_id);
2188 if (g_signal_handler_is_connected (binding->object,
2189 binding->property_handler_id))
2190 g_signal_handler_disconnect (binding->object,
2191 binding->property_handler_id);
2193 g_settings_free_key_info (&binding->info);
2195 if (binding->destroy)
2196 binding->destroy (binding->user_data);
2198 g_slice_free (GSettingsBinding, binding);
2202 g_settings_binding_quark (const char *property)
2207 tmp = g_strdup_printf ("gsettingsbinding-%s", property);
2208 quark = g_quark_from_string (tmp);
2215 g_settings_binding_key_changed (GSettings *settings,
2219 GSettingsBinding *binding = user_data;
2220 GValue value = { 0, };
2223 g_assert (settings == binding->info.settings);
2224 g_assert (key == binding->info.key);
2226 if (binding->running)
2229 binding->running = TRUE;
2231 g_value_init (&value, binding->property->value_type);
2233 variant = g_settings_read_from_backend (&binding->info);
2234 if (variant && !binding->get_mapping (&value, variant, binding->user_data))
2236 /* silently ignore errors in the user's config database */
2237 g_variant_unref (variant);
2241 if (variant == NULL)
2243 variant = g_settings_get_translated_default (&binding->info);
2245 !binding->get_mapping (&value, variant, binding->user_data))
2247 /* flag translation errors with a warning */
2248 g_warning ("Translated default `%s' for key `%s' in schema `%s' "
2249 "was rejected by the binding mapping function",
2250 binding->info.unparsed, binding->info.key,
2251 binding->info.settings->priv->schema_name);
2252 g_variant_unref (variant);
2257 if (variant == NULL)
2259 variant = g_variant_ref (binding->info.default_value);
2260 if (!binding->get_mapping (&value, variant, binding->user_data))
2261 g_error ("The schema default value for key `%s' in schema `%s' "
2262 "was rejected by the binding mapping function.",
2264 binding->info.settings->priv->schema_name);
2267 g_object_set_property (binding->object, binding->property->name, &value);
2268 g_variant_unref (variant);
2269 g_value_unset (&value);
2271 binding->running = FALSE;
2275 g_settings_binding_property_changed (GObject *object,
2276 const GParamSpec *pspec,
2279 GSettingsBinding *binding = user_data;
2280 GValue value = { 0, };
2283 g_assert (object == binding->object);
2284 g_assert (pspec == binding->property);
2286 if (binding->running)
2289 binding->running = TRUE;
2291 g_value_init (&value, pspec->value_type);
2292 g_object_get_property (object, pspec->name, &value);
2293 if ((variant = binding->set_mapping (&value, binding->info.type,
2294 binding->user_data)))
2296 if (g_variant_is_floating (variant))
2297 g_variant_ref_sink (variant);
2299 if (!g_settings_type_check (&binding->info, variant))
2301 g_critical ("binding mapping function for key `%s' returned "
2302 "GVariant of type `%s' when type `%s' was requested",
2303 binding->info.key, g_variant_get_type_string (variant),
2304 g_variant_type_dup_string (binding->info.type));
2308 if (!g_settings_range_check (&binding->info, variant))
2310 g_critical ("GObject property `%s' on a `%s' object is out of "
2311 "schema-specified range for key `%s' of `%s': %s",
2312 binding->property->name,
2313 g_type_name (binding->property->owner_type),
2315 binding->info.settings->priv->schema_name,
2316 g_variant_print (variant, TRUE));
2320 g_settings_write_to_backend (&binding->info, variant);
2321 g_variant_unref (variant);
2323 g_value_unset (&value);
2325 binding->running = FALSE;
2330 * @settings: a #GSettings object
2331 * @key: the key to bind
2332 * @object: a #GObject
2333 * @property: the name of the property to bind
2334 * @flags: flags for the binding
2336 * Create a binding between the @key in the @settings object
2337 * and the property @property of @object.
2339 * The binding uses the default GIO mapping functions to map
2340 * between the settings and property values. These functions
2341 * handle booleans, numeric types and string types in a
2342 * straightforward way. Use g_settings_bind_with_mapping() if
2343 * you need a custom mapping, or map between types that are not
2344 * supported by the default mapping functions.
2346 * Unless the @flags include %G_SETTINGS_BIND_NO_SENSITIVITY, this
2347 * function also establishes a binding between the writability of
2348 * @key and the "sensitive" property of @object (if @object has
2349 * a boolean property by that name). See g_settings_bind_writable()
2350 * for more details about writable bindings.
2352 * Note that the lifecycle of the binding is tied to the object,
2353 * and that you can have only one binding per object property.
2354 * If you bind the same property twice on the same object, the second
2355 * binding overrides the first one.
2360 g_settings_bind (GSettings *settings,
2363 const gchar *property,
2364 GSettingsBindFlags flags)
2366 g_settings_bind_with_mapping (settings, key, object, property,
2367 flags, NULL, NULL, NULL, NULL);
2371 * g_settings_bind_with_mapping:
2372 * @settings: a #GSettings object
2373 * @key: the key to bind
2374 * @object: a #GObject
2375 * @property: the name of the property to bind
2376 * @flags: flags for the binding
2377 * @get_mapping: a function that gets called to convert values
2378 * from @settings to @object, or %NULL to use the default GIO mapping
2379 * @set_mapping: a function that gets called to convert values
2380 * from @object to @settings, or %NULL to use the default GIO mapping
2381 * @user_data: data that gets passed to @get_mapping and @set_mapping
2382 * @destroy: #GDestroyNotify function for @user_data
2384 * Create a binding between the @key in the @settings object
2385 * and the property @property of @object.
2387 * The binding uses the provided mapping functions to map between
2388 * settings and property values.
2390 * Note that the lifecycle of the binding is tied to the object,
2391 * and that you can have only one binding per object property.
2392 * If you bind the same property twice on the same object, the second
2393 * binding overrides the first one.
2398 g_settings_bind_with_mapping (GSettings *settings,
2401 const gchar *property,
2402 GSettingsBindFlags flags,
2403 GSettingsBindGetMapping get_mapping,
2404 GSettingsBindSetMapping set_mapping,
2406 GDestroyNotify destroy)
2408 GSettingsBinding *binding;
2409 GObjectClass *objectclass;
2410 gchar *detailed_signal;
2411 GQuark binding_quark;
2413 g_return_if_fail (G_IS_SETTINGS (settings));
2415 objectclass = G_OBJECT_GET_CLASS (object);
2417 binding = g_slice_new0 (GSettingsBinding);
2418 g_settings_get_key_info (&binding->info, settings, key);
2419 binding->object = object;
2420 binding->property = g_object_class_find_property (objectclass, property);
2421 binding->user_data = user_data;
2422 binding->destroy = destroy;
2423 binding->get_mapping = get_mapping ? get_mapping : g_settings_get_mapping;
2424 binding->set_mapping = set_mapping ? set_mapping : g_settings_set_mapping;
2426 if (!(flags & (G_SETTINGS_BIND_GET | G_SETTINGS_BIND_SET)))
2427 flags |= G_SETTINGS_BIND_GET | G_SETTINGS_BIND_SET;
2429 if (binding->property == NULL)
2431 g_critical ("g_settings_bind: no property '%s' on class '%s'",
2432 property, G_OBJECT_TYPE_NAME (object));
2436 if ((flags & G_SETTINGS_BIND_GET) &&
2437 (binding->property->flags & G_PARAM_WRITABLE) == 0)
2439 g_critical ("g_settings_bind: property '%s' on class '%s' is not "
2440 "writable", property, G_OBJECT_TYPE_NAME (object));
2443 if ((flags & G_SETTINGS_BIND_SET) &&
2444 (binding->property->flags & G_PARAM_READABLE) == 0)
2446 g_critical ("g_settings_bind: property '%s' on class '%s' is not "
2447 "readable", property, G_OBJECT_TYPE_NAME (object));
2451 if (((get_mapping == NULL && (flags & G_SETTINGS_BIND_GET)) ||
2452 (set_mapping == NULL && (flags & G_SETTINGS_BIND_SET))) &&
2453 !g_settings_mapping_is_compatible (binding->property->value_type,
2454 binding->info.type))
2456 g_critical ("g_settings_bind: property '%s' on class '%s' has type "
2457 "'%s' which is not compatible with type '%s' of key '%s' "
2458 "on schema '%s'", property, G_OBJECT_TYPE_NAME (object),
2459 g_type_name (binding->property->value_type),
2460 g_variant_type_dup_string (binding->info.type), key,
2461 settings->priv->schema_name);
2465 if ((flags & G_SETTINGS_BIND_SET) &&
2466 (~flags & G_SETTINGS_BIND_NO_SENSITIVITY))
2468 GParamSpec *sensitive;
2470 sensitive = g_object_class_find_property (objectclass, "sensitive");
2472 if (sensitive && sensitive->value_type == G_TYPE_BOOLEAN &&
2473 (sensitive->flags & G_PARAM_WRITABLE))
2474 g_settings_bind_writable (settings, binding->info.key,
2475 object, "sensitive", FALSE);
2478 if (flags & G_SETTINGS_BIND_SET)
2480 detailed_signal = g_strdup_printf ("notify::%s", property);
2481 binding->property_handler_id =
2482 g_signal_connect (object, detailed_signal,
2483 G_CALLBACK (g_settings_binding_property_changed),
2485 g_free (detailed_signal);
2487 if (~flags & G_SETTINGS_BIND_GET)
2488 g_settings_binding_property_changed (object,
2493 if (flags & G_SETTINGS_BIND_GET)
2495 if (~flags & G_SETTINGS_BIND_GET_NO_CHANGES)
2497 detailed_signal = g_strdup_printf ("changed::%s", key);
2498 binding->key_handler_id =
2499 g_signal_connect (settings, detailed_signal,
2500 G_CALLBACK (g_settings_binding_key_changed),
2502 g_free (detailed_signal);
2505 g_settings_binding_key_changed (settings, binding->info.key, binding);
2508 binding_quark = g_settings_binding_quark (property);
2509 g_object_set_qdata_full (object, binding_quark,
2510 binding, g_settings_binding_free);
2513 /* Writability binding {{{1 */
2516 GSettings *settings;
2519 const gchar *property;
2522 } GSettingsWritableBinding;
2525 g_settings_writable_binding_free (gpointer data)
2527 GSettingsWritableBinding *binding = data;
2529 g_signal_handler_disconnect (binding->settings, binding->handler_id);
2530 g_object_unref (binding->settings);
2531 g_slice_free (GSettingsWritableBinding, binding);
2535 g_settings_binding_writable_changed (GSettings *settings,
2539 GSettingsWritableBinding *binding = user_data;
2542 g_assert (settings == binding->settings);
2543 g_assert (key == binding->key);
2545 writable = g_settings_is_writable (settings, key);
2547 if (binding->inverted)
2548 writable = !writable;
2550 g_object_set (binding->object, binding->property, writable, NULL);
2554 * g_settings_bind_writable:
2555 * @settings: a #GSettings object
2556 * @key: the key to bind
2557 * @object: a #GObject
2558 * @property: the name of a boolean property to bind
2559 * @inverted: whether to 'invert' the value
2561 * Create a binding between the writability of @key in the
2562 * @settings object and the property @property of @object.
2563 * The property must be boolean; "sensitive" or "visible"
2564 * properties of widgets are the most likely candidates.
2566 * Writable bindings are always uni-directional; changes of the
2567 * writability of the setting will be propagated to the object
2568 * property, not the other way.
2570 * When the @inverted argument is %TRUE, the binding inverts the
2571 * value as it passes from the setting to the object, i.e. @property
2572 * will be set to %TRUE if the key is <emphasis>not</emphasis>
2575 * Note that the lifecycle of the binding is tied to the object,
2576 * and that you can have only one binding per object property.
2577 * If you bind the same property twice on the same object, the second
2578 * binding overrides the first one.
2583 g_settings_bind_writable (GSettings *settings,
2586 const gchar *property,
2589 GSettingsWritableBinding *binding;
2590 gchar *detailed_signal;
2593 g_return_if_fail (G_IS_SETTINGS (settings));
2595 pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (object), property);
2598 g_critical ("g_settings_bind_writable: no property '%s' on class '%s'",
2599 property, G_OBJECT_TYPE_NAME (object));
2602 if ((pspec->flags & G_PARAM_WRITABLE) == 0)
2604 g_critical ("g_settings_bind_writable: property '%s' on class '%s' is not writable",
2605 property, G_OBJECT_TYPE_NAME (object));
2609 binding = g_slice_new (GSettingsWritableBinding);
2610 binding->settings = g_object_ref (settings);
2611 binding->object = object;
2612 binding->key = g_intern_string (key);
2613 binding->property = g_intern_string (property);
2614 binding->inverted = inverted;
2616 detailed_signal = g_strdup_printf ("writable-changed::%s", key);
2617 binding->handler_id =
2618 g_signal_connect (settings, detailed_signal,
2619 G_CALLBACK (g_settings_binding_writable_changed),
2621 g_free (detailed_signal);
2623 g_object_set_qdata_full (object, g_settings_binding_quark (property),
2624 binding, g_settings_writable_binding_free);
2626 g_settings_binding_writable_changed (settings, binding->key, binding);
2630 * g_settings_unbind:
2631 * @object: the object
2632 * @property: the property whose binding is removed
2634 * Removes an existing binding for @property on @object.
2636 * Note that bindings are automatically removed when the
2637 * object is finalized, so it is rarely necessary to call this
2643 g_settings_unbind (gpointer object,
2644 const gchar *property)
2646 GQuark binding_quark;
2648 binding_quark = g_settings_binding_quark (property);
2649 g_object_set_qdata (object, binding_quark, NULL);
2653 #define __G_SETTINGS_C__
2654 #include "gioaliasdef.c"
2656 /* vim:set foldmethod=marker: */