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|
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* nautilus-preferences.c - Preference peek/poke/notify implementation.
Copyright (C) 1999, 2000 Eazel, Inc.
The Gnome Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the Gnome Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Authors: Ramiro Estrugo <ramiro@eazel.com>
*/
#include <config.h>
#include "nautilus-preferences.h"
#include "nautilus-gconf-extensions.h"
#include "nautilus-lib-self-check-functions.h"
#include <eel/eel-enumeration.h>
#include <eel/eel-glib-extensions.h>
#include <eel/eel-string-list.h>
#include <eel/eel-string.h>
#include <gconf/gconf-client.h>
#include <gconf/gconf.h>
#include <gtk/gtksignal.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <libgnomeui/gnome-dialog.h>
#include <libgnomeui/gnome-dialog-util.h>
#define DEFAULT_USER_LEVEL NAUTILUS_USER_LEVEL_INTERMEDIATE
#define USER_LEVEL_KEY "/apps/nautilus/user_level"
/* An enumeration used for updating auto-storage variables in a type-specific way.
* FIXME: there is another enumeration like this in nautilus-global-preferences.c,
* used for different purposes but in a related way. Should we combine them?
*/
typedef enum
{
PREFERENCE_BOOLEAN = 1,
PREFERENCE_INTEGER,
PREFERENCE_STRING,
PREFERENCE_STRING_LIST
} PreferenceType;
/*
* PreferencesEntry:
*
* A structure to manage preference hash table nodes.
* Preferences are hash tables. The hash key is the preference name
* (a string). The hash value is a pointer of the following struct:
*/
typedef struct {
char *name;
char *description;
PreferenceType type;
GList *callback_list;
gboolean callbacks_blocked;
GList *auto_storage_list;
int gconf_connection_id;
char *enumeration_id;
GConfValue *cached_value;
} PreferencesEntry;
/*
* PreferencesCallbackEntry:
*
* A structure to manage callback lists. A callback list is a GList.
* The callback_data in each list node is a pointer to the following
* struct:
*/
typedef struct {
NautilusPreferencesCallback callback;
gpointer callback_data;
} PreferencesCallbackEntry;
static const char *user_level_names_for_display[] =
{
N_("Beginner"),
N_("Intermediate"),
N_("Advanced")
};
static const char *user_level_names_for_storage[] =
{
"novice",
"intermediate",
"advanced"
};
static const char * preferences_peek_storage_path (void);
static const char * preferences_peek_defaults_path (void);
static const char * preferences_peek_visibility_path (void);
static gboolean preferences_preference_is_internal (const char *name);
static gboolean preferences_preference_is_user_level (const char *name);
static gboolean preferences_preference_is_default (const char *name);
static char * preferences_key_make (const char *name);
static char * preferences_key_make_for_getter (const char *name);
static char * preferences_key_make_for_default (const char *name,
int user_level);
static char * preferences_key_make_for_default_getter (const char *name,
int user_level);
static char * preferences_key_make_for_visibility (const char *name);
static void preferences_user_level_changed_notice (GConfClient *client,
guint connection_id,
GConfEntry *gconf_entry,
gpointer user_data);
static void preferences_something_changed_notice (GConfClient *client,
guint connection_id,
GConfEntry *gconf_entry,
gpointer user_data);
static void preferences_global_table_check_changes_function (gpointer key,
gpointer value,
gpointer callback_data);
static GHashTable *preferences_global_table_get_global (void);
static void preferences_callback_entry_free (PreferencesCallbackEntry *callback_entry);
static void preferences_entry_update_auto_storage (PreferencesEntry *entry);
static void preferences_global_table_free (void);
static const char * preferences_peek_user_level_name_for_storage (int user_level);
static PreferencesEntry * preferences_global_table_lookup_or_insert (const char *name);
static guint user_level_changed_connection_id = NAUTILUS_GCONF_UNDEFINED_CONNECTION;
static GHashTable *global_table = NULL;
static char *storage_path = NULL;
static char *defaults_path = NULL;
static char *visiblity_path = NULL;
static gboolean initialized = FALSE;
static const char *
preferences_peek_storage_path (void)
{
g_return_val_if_fail (storage_path != NULL, NULL);
return storage_path;
}
static void
preferences_set_storage_path (const char *new_storage_path)
{
g_return_if_fail (eel_strlen (new_storage_path) > 0);
/* Make sure the path is indeed different */
if (eel_str_is_equal (new_storage_path, storage_path)) {
return;
}
/* Free the preference hash table */
preferences_global_table_free ();
/* Stop monitoring the old path */
nautilus_gconf_monitor_remove (storage_path);
storage_path = g_strdup (new_storage_path);
/* Start monitoring the new path */
nautilus_gconf_monitor_add (storage_path);
}
static gboolean
preferences_is_initialized (void)
{
return initialized;
}
static const char *
preferences_peek_defaults_path (void)
{
if (defaults_path == NULL) {
defaults_path = g_strdup_printf ("%s/defaults", preferences_peek_storage_path ());
}
return defaults_path;
}
static const char *
preferences_peek_visibility_path (void)
{
if (visiblity_path == NULL) {
visiblity_path = g_strdup_printf ("%s/visibility", preferences_peek_storage_path ());
}
return visiblity_path;
}
static const char *
preferences_peek_user_level_name_for_storage (int user_level)
{
user_level = nautilus_preferences_user_level_clamp (user_level);
return user_level_names_for_storage[user_level];
}
/* If the preference name begind with a "/", we interpret
* it as a straight gconf key. */
static gboolean
preferences_preference_is_internal (const char *name)
{
g_return_val_if_fail (name != NULL, FALSE);
if (eel_str_has_prefix (name, "/")) {
return FALSE;
}
return TRUE;
}
static gboolean
preferences_preference_is_user_level (const char *name)
{
g_return_val_if_fail (name != NULL, FALSE);
return eel_str_is_equal (name, USER_LEVEL_KEY)
|| eel_str_is_equal (name, "user_level");
}
static char *
preferences_key_make (const char *name)
{
g_return_val_if_fail (name != NULL, NULL);
if (!preferences_preference_is_internal (name)) {
return g_strdup (name);
}
/* Otherwise, we prefix it with the path */
return g_strdup_printf ("%s/%s", preferences_peek_storage_path (), name);
}
static char *
preferences_key_make_for_default (const char *name,
int user_level)
{
char *key;
char *default_key = NULL;
g_return_val_if_fail (name != NULL, NULL);
user_level = nautilus_preferences_user_level_clamp (user_level);
key = preferences_key_make (name);
default_key = g_strdup_printf ("%s/%s%s",
preferences_peek_defaults_path (),
preferences_peek_user_level_name_for_storage (user_level),
key);
g_free (key);
return default_key;
}
static char *
preferences_key_make_for_default_getter (const char *name,
int user_level)
{
char *default_key_for_getter = NULL;
gboolean done;
g_return_val_if_fail (name != NULL, NULL);
user_level = nautilus_preferences_user_level_clamp (user_level);
done = FALSE;
while (!done) {
default_key_for_getter = preferences_key_make_for_default (name, user_level);
done = (user_level == 0) || (!nautilus_gconf_is_default (default_key_for_getter));
if (!done) {
g_free (default_key_for_getter);
user_level--;
}
}
return default_key_for_getter;
}
static char *
preferences_key_make_for_visibility (const char *name)
{
char *default_key;
char *key;
g_return_val_if_fail (name != NULL, NULL);
key = preferences_key_make (name);
default_key = g_strdup_printf ("%s%s", preferences_peek_visibility_path (), key);
g_free (key);
return default_key;
}
static gboolean
preferences_preference_is_default (const char *name)
{
gboolean result;
char *key;
g_return_val_if_fail (name != NULL, FALSE);
key = preferences_key_make (name);
result = nautilus_gconf_is_default (key);
g_free (key);
return result;
}
static char *
preferences_make_user_level_filtered_key (const char *name)
{
char *key;
g_return_val_if_fail (name != NULL, NULL);
if (nautilus_preferences_is_visible (name)) {
key = preferences_key_make (name);
} else {
key = preferences_key_make_for_default (name, nautilus_preferences_get_user_level ());
}
return key;
}
static void
preferences_block_callbacks (const char *name)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
entry->callbacks_blocked = TRUE;
}
static void
preferences_unblock_callbacks (const char *name)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
entry->callbacks_blocked = FALSE;
}
/* Public preferences functions */
int
nautilus_preferences_get_visible_user_level (const char *name)
{
int result;
char *visible_key;
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (preferences_is_initialized (), FALSE);
visible_key = preferences_key_make_for_visibility (name);
result = nautilus_gconf_get_integer (visible_key);
g_free (visible_key);
return result;
}
void
nautilus_preferences_set_visible_user_level (const char *name,
int visible_user_level)
{
char *visible_key;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
visible_key = preferences_key_make_for_visibility (name);
nautilus_gconf_set_integer (visible_key, visible_user_level);
g_free (visible_key);
}
void
nautilus_preferences_set_boolean (const char *name,
gboolean boolean_value)
{
char *key;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
key = preferences_key_make (name);
nautilus_gconf_set_boolean (key, boolean_value);
g_free (key);
nautilus_gconf_suggest_sync ();
}
static char *
preferences_key_make_for_getter (const char *name)
{
char *key;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_is_initialized (), NULL);
if (preferences_preference_is_default (name) || !nautilus_preferences_is_visible (name)) {
key = preferences_key_make_for_default_getter (name, nautilus_preferences_get_user_level ());
} else {
key = preferences_make_user_level_filtered_key (name);
}
return key;
}
gboolean
nautilus_preferences_get_boolean (const char *name)
{
gboolean result;
char *key;
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (preferences_is_initialized (), FALSE);
key = preferences_key_make_for_getter (name);
result = nautilus_gconf_get_boolean (key);
g_free (key);
return result;
}
void
nautilus_preferences_set_integer (const char *name,
int int_value)
{
char *key;
int old_value;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
key = preferences_key_make (name);
old_value = nautilus_preferences_get_integer (name);
if (int_value != old_value) {
nautilus_gconf_set_integer (key, int_value);
nautilus_gconf_suggest_sync ();
}
g_free (key);
}
int
nautilus_preferences_get_integer (const char *name)
{
int result;
char *key;
g_return_val_if_fail (name != NULL, 0);
g_return_val_if_fail (preferences_is_initialized (), 0);
key = preferences_key_make_for_getter (name);
result = nautilus_gconf_get_integer (key);
g_free (key);
return result;
}
void
nautilus_preferences_set (const char *name,
const char *string_value)
{
char *key;
char *old_value;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
key = preferences_key_make (name);
old_value = nautilus_preferences_get (name);
if (strcmp (string_value, old_value) != 0) {
nautilus_gconf_set_string (key, string_value);
nautilus_gconf_suggest_sync ();
}
g_free (key);
}
char *
nautilus_preferences_get (const char *name)
{
char *result;
char *key;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_is_initialized (), NULL);
key = preferences_key_make_for_getter (name);
result = nautilus_gconf_get_string (key);
g_free (key);
if (result == NULL) {
result = g_strdup ("");
}
return result;
}
void
nautilus_preferences_set_string_list (const char *name,
const EelStringList *string_list_value)
{
char *key;
GSList *slist;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
slist = eel_string_list_as_g_slist (string_list_value);
key = preferences_key_make (name);
nautilus_gconf_set_string_list (key, slist);
g_free (key);
eel_g_slist_free_deep (slist);
nautilus_gconf_suggest_sync ();
}
static gboolean
string_list_is_valid (const EelStringList *string_list,
const char *enumeration_id)
{
guint i;
char *nth;
gboolean bad;
g_return_val_if_fail (string_list != NULL, FALSE);
g_return_val_if_fail (enumeration_id != NULL, FALSE);
bad = FALSE;
for (i = 0; i < eel_string_list_get_length (string_list) && !bad; i++) {
nth = eel_string_list_nth (string_list, i);
bad = !eel_enumeration_id_contains_name (enumeration_id, nth);
g_free (nth);
}
return !bad;
}
EelStringList *
nautilus_preferences_get_string_list (const char *name)
{
EelStringList *result;
char *key;
GSList *slist;
PreferencesEntry *entry;
char *default_key;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_is_initialized (), NULL);
key = preferences_key_make_for_getter (name);
slist = nautilus_gconf_get_string_list (key);
g_free (key);
result = eel_string_list_new_from_g_slist (slist, TRUE);
eel_g_slist_free_deep (slist);
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
/* No enumeration_id so we're done */
if (entry->enumeration_id == NULL) {
return result;
}
/* Do a sanity check on the validity of the values */
if (string_list_is_valid (result, entry->enumeration_id)) {
return result;
}
/* Forget the bad value and use the default instead */
eel_string_list_free (result);
default_key = preferences_key_make_for_default_getter (name,
nautilus_preferences_get_user_level ());
slist = nautilus_gconf_get_string_list (default_key);
g_free (default_key);
result = eel_string_list_new_from_g_slist (slist, TRUE);
eel_g_slist_free_deep (slist);
/* Go the extra mile and fix the problem for the user */
preferences_block_callbacks (name);
nautilus_preferences_set_string_list (name, result);
preferences_unblock_callbacks (name);
return result;
}
int
nautilus_preferences_get_user_level (void)
{
char *user_level;
int result;
g_return_val_if_fail (preferences_is_initialized (), 0);
user_level = nautilus_gconf_get_string (USER_LEVEL_KEY);
if (eel_str_is_equal (user_level, "advanced")) {
result = NAUTILUS_USER_LEVEL_ADVANCED;
} else if (eel_str_is_equal (user_level, "intermediate")) {
result = NAUTILUS_USER_LEVEL_INTERMEDIATE;
} else if (eel_str_is_equal (user_level, "novice")) {
result = NAUTILUS_USER_LEVEL_NOVICE;
} else {
result = DEFAULT_USER_LEVEL;
}
g_free (user_level);
return result;
}
void
nautilus_preferences_set_user_level (int user_level)
{
g_return_if_fail (preferences_is_initialized ());
g_return_if_fail (nautilus_preferences_user_level_is_valid (user_level));
user_level = nautilus_preferences_user_level_clamp (user_level);
nautilus_gconf_set_string (USER_LEVEL_KEY, user_level_names_for_storage[user_level]);
nautilus_gconf_suggest_sync ();
}
void
nautilus_preferences_default_set_integer (const char *name,
int user_level,
int int_value)
{
char *default_key;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
default_key = preferences_key_make_for_default (name, user_level);
nautilus_gconf_set_integer (default_key, int_value);
g_free (default_key);
}
int
nautilus_preferences_default_get_integer (const char *name,
int user_level)
{
int result;
char *default_key;
g_return_val_if_fail (name != NULL, 0);
g_return_val_if_fail (preferences_is_initialized (), 0);
default_key = preferences_key_make_for_default (name, user_level);
result = nautilus_gconf_get_integer (default_key);
g_free (default_key);
return result;
}
void
nautilus_preferences_default_set_boolean (const char *name,
int user_level,
gboolean boolean_value)
{
char *default_key;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
default_key = preferences_key_make_for_default (name, user_level);
nautilus_gconf_set_boolean (default_key, boolean_value);
g_free (default_key);
}
gboolean
nautilus_preferences_default_get_boolean (const char *name,
int user_level)
{
gboolean result;
char *default_key;
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (preferences_is_initialized (), FALSE);
default_key = preferences_key_make_for_default (name, user_level);
result = nautilus_gconf_get_boolean (default_key);
g_free (default_key);
return result;
}
void
nautilus_preferences_default_set_string (const char *name,
int user_level,
const char *string_value)
{
char *default_key;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
default_key = preferences_key_make_for_default (name, user_level);
nautilus_gconf_set_string (default_key, string_value);
g_free (default_key);
}
char *
nautilus_preferences_default_get_string (const char *name,
int user_level)
{
char *result;
char *default_key;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_is_initialized (), NULL);
default_key = preferences_key_make_for_default (name, user_level);
result = nautilus_gconf_get_string (default_key);
g_free (default_key);
return result;
}
void
nautilus_preferences_default_set_string_list (const char *name,
int user_level,
const EelStringList *string_list_value)
{
char *default_key;
GSList *slist;
g_return_if_fail (name != NULL);
g_return_if_fail (preferences_is_initialized ());
slist = eel_string_list_as_g_slist (string_list_value);
default_key = preferences_key_make_for_default (name, user_level);
nautilus_gconf_set_string_list (default_key, slist);
g_free (default_key);
eel_g_slist_free_deep (slist);
}
EelStringList *
nautilus_preferences_default_get_string_list (const char *name,
int user_level)
{
EelStringList *result;
char *default_key;
GSList *slist;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_is_initialized (), NULL);
default_key = preferences_key_make_for_default (name, user_level);
slist = nautilus_gconf_get_string_list (default_key);
g_free (default_key);
result = eel_string_list_new_from_g_slist (slist, TRUE);
eel_g_slist_free_deep (slist);
return result;
}
/**
* preferences_callback_entry_invoke_function
*
* A function that invokes a callback from the given struct. It is meant to be fed to
* g_list_foreach ()
* @data: The list data privately maintained by the GList.
* @callback_data: The callback_data privately maintained by the GList.
**/
static void
preferences_callback_entry_invoke_function (gpointer data,
gpointer callback_data)
{
PreferencesCallbackEntry *callback_entry;
g_return_if_fail (data != NULL);
callback_entry = data;
(* callback_entry->callback) (callback_entry->callback_data);
}
/**
* preferences_entry_invoke_callbacks_if_needed
*
* @entry: A PreferencesEntry
*
* This function checks the cached value in the entry with the current
* value of the preference. If the value has changed, then callbacks
* are invoked and auto storage updated.
*
* We need this check because even though the GConf value of a preference
* could indeed have changed, its representation on the Nautilus side
* of things could still be the same. The best example of this is
* user level changes, where the value of the preference on the Nautilus
* end of things is determined by visibility.
**/
static void
preferences_entry_invoke_callbacks_if_needed (PreferencesEntry *entry)
{
GConfValue *new_value;
char *getter_key;
g_return_if_fail (entry != NULL);
getter_key = preferences_key_make_for_getter (entry->name);
new_value = nautilus_gconf_get_value (getter_key);
g_free (getter_key);
/* If the values are the same, then we dont need to invoke any callbacks */
if (nautilus_gconf_value_is_equal (entry->cached_value, new_value)) {
nautilus_gconf_value_free (new_value);
return;
}
/* Update the auto storage preferences */
if (entry->auto_storage_list != NULL) {
preferences_entry_update_auto_storage (entry);
}
/* Store the new cached value */
nautilus_gconf_value_free (entry->cached_value);
entry->cached_value = new_value;
/* Dont invoke callbacks if the entry is blocked */
if (entry->callbacks_blocked) {
return;
}
/* Invoke callbacks for this entry if any */
if (entry->callback_list != NULL) {
g_list_foreach (entry->callback_list,
preferences_callback_entry_invoke_function,
NULL);
}
}
static void
update_auto_string (gpointer data, gpointer callback_data)
{
char **storage;
const char *value;
g_return_if_fail (data != NULL);
g_return_if_fail (callback_data != NULL);
storage = (char **)data;
value = (const char *)callback_data;
g_free (*storage);
*(char **)storage = g_strdup (value);
}
static void
update_auto_string_list (gpointer data, gpointer callback_data)
{
EelStringList **storage;
const EelStringList *value;
g_return_if_fail (data != NULL);
g_return_if_fail (callback_data != NULL);
storage = (EelStringList **)data;
value = (const EelStringList *)callback_data;
eel_string_list_free (*storage);
*(EelStringList **)storage = eel_string_list_copy (value);
}
static void
update_auto_integer_or_boolean (gpointer data, gpointer callback_data)
{
g_return_if_fail (data != NULL);
*(int *)data = GPOINTER_TO_INT (callback_data);
}
static void
preferences_entry_update_auto_storage (PreferencesEntry *entry)
{
char *new_string_value;
EelStringList *new_string_list_value;
int new_int_value;
gboolean new_boolean_value;
switch (entry->type) {
case PREFERENCE_STRING:
new_string_value = nautilus_preferences_get (entry->name);
g_list_foreach (entry->auto_storage_list,
update_auto_string,
new_string_value);
g_free (new_string_value);
break;
case PREFERENCE_STRING_LIST:
new_string_list_value = nautilus_preferences_get_string_list (entry->name);
g_list_foreach (entry->auto_storage_list,
update_auto_string_list,
new_string_list_value);
eel_string_list_free (new_string_list_value);
break;
case PREFERENCE_INTEGER:
new_int_value = nautilus_preferences_get_integer (entry->name);
g_list_foreach (entry->auto_storage_list,
update_auto_integer_or_boolean,
GINT_TO_POINTER (new_int_value));
break;
case PREFERENCE_BOOLEAN:
new_boolean_value = nautilus_preferences_get_boolean (entry->name);
g_list_foreach (entry->auto_storage_list,
update_auto_integer_or_boolean,
GINT_TO_POINTER (new_boolean_value));
break;
default:
g_warning ("unexpected preferences type %d in preferences_entry_update_auto_storage", entry->type);
}
}
static void
preferences_something_changed_notice (GConfClient *client,
guint connection_id,
GConfEntry *entry,
gpointer notice_data)
{
g_return_if_fail (entry != NULL);
g_return_if_fail (entry->key != NULL);
g_return_if_fail (notice_data != NULL);
preferences_entry_invoke_callbacks_if_needed (notice_data);
}
static void
preferences_global_table_check_changes_function (gpointer key,
gpointer value,
gpointer user_data)
{
PreferencesEntry *entry;
g_return_if_fail (key != NULL);
g_return_if_fail (value != NULL);
entry = value;
g_return_if_fail (entry->name != NULL);
/* We dont worry about the 'user_level' itself for recursive reasons */
if (preferences_preference_is_user_level (entry->name)) {
return;
}
preferences_entry_invoke_callbacks_if_needed (entry);
}
static void
preferences_entry_update_cached_value (PreferencesEntry *entry)
{
char *getter_key;
g_return_if_fail (entry != NULL);
nautilus_gconf_value_free (entry->cached_value);
getter_key = preferences_key_make_for_getter (entry->name);
entry->cached_value = nautilus_gconf_get_value (getter_key);
g_free (getter_key);
}
static void
preferences_user_level_changed_notice (GConfClient *client,
guint connection_id,
GConfEntry *gconf_entry,
gpointer user_data)
{
g_return_if_fail (gconf_entry != NULL);
g_return_if_fail (gconf_entry->key != NULL);
g_return_if_fail (eel_str_has_suffix (gconf_entry->key, "user_level"));
g_hash_table_foreach (preferences_global_table_get_global (),
preferences_global_table_check_changes_function,
NULL);
}
static void
preferences_entry_ensure_gconf_connection (PreferencesEntry *entry)
{
char *key;
/*
* We install only one gconf notification for each preference entry.
* Otherwise, we would invoke the installed callbacks more than once
* per registered callback.
*/
if (entry->gconf_connection_id != NAUTILUS_GCONF_UNDEFINED_CONNECTION) {
return;
}
g_return_if_fail (entry->name != NULL);
key = preferences_key_make (entry->name);
entry->gconf_connection_id = nautilus_gconf_notification_add (key,
preferences_something_changed_notice,
entry);
g_free (key);
g_return_if_fail (entry->gconf_connection_id != NAUTILUS_GCONF_UNDEFINED_CONNECTION);
/* Update the cached value.
* From now onwards the cached value will be updated
* each time preferences_something_changed_notice() triggers
* so that it can be later compared with new values to
* determine if the gconf value is different from the
* Nautilus value.
*/
preferences_entry_update_cached_value (entry);
}
/**
* preferences_entry_add_callback
*
* Add a callback to a pref node. Callbacks are fired whenever
* the pref value changes.
* @preferences_entry: The hash node.
* @callback: The user-supplied callback.
* @callback_data: The user-supplied closure.
**/
static void
preferences_entry_add_callback (PreferencesEntry *entry,
NautilusPreferencesCallback callback,
gpointer callback_data)
{
PreferencesCallbackEntry *callback_entry;
g_return_if_fail (entry != NULL);
g_return_if_fail (callback != NULL);
callback_entry = g_new0 (PreferencesCallbackEntry, 1);
callback_entry->callback = callback;
callback_entry->callback_data = callback_data;
g_return_if_fail (callback_entry != NULL);
entry->callback_list = g_list_append (entry->callback_list, callback_entry);
preferences_entry_ensure_gconf_connection (entry);
}
/**
* preferences_entry_add_auto_storage
*
* Add an auto-storage variable to a pref node. The variable will
* be updated to match the pref value whenever the pref
* the pref value changes.
* @preferences_entry: The hash node.
* @storage: The user-supplied location at which to store the value.
* @type: Which type of variable this is.
**/
static void
preferences_entry_add_auto_storage (PreferencesEntry *entry,
gpointer storage,
PreferenceType type)
{
g_return_if_fail (entry != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (entry->type == 0 || entry->type == type);
g_return_if_fail (g_list_find (entry->auto_storage_list, storage) == NULL);
entry->type = type;
entry->auto_storage_list = g_list_append (entry->auto_storage_list, storage);
preferences_entry_ensure_gconf_connection (entry);
}
static void
preferences_entry_check_remove_connection (PreferencesEntry *entry)
{
/*
* If there are no callbacks or auto-storage variables left in the entry,
* remove the gconf notification.
*/
if (entry->callback_list != NULL || entry->auto_storage_list != NULL) {
return;
}
nautilus_gconf_notification_remove (entry->gconf_connection_id);
entry->gconf_connection_id = NAUTILUS_GCONF_UNDEFINED_CONNECTION;
}
/**
* preferences_entry_remove_callback
*
* remove a callback from a pref entry. Both the callback and the callback_data must
* match in order for a callback to be removed from the entry.
* @preferences_entry: The hash entry.
* @callback: The user-supplied callback.
* @callback_data: The user-supplied closure.
**/
static void
preferences_entry_remove_callback (PreferencesEntry *entry,
NautilusPreferencesCallback callback,
gpointer callback_data)
{
GList *new_list;
const GList *node;
g_return_if_fail (entry != NULL);
g_return_if_fail (callback != NULL);
g_return_if_fail (entry->callback_list != NULL);
new_list = g_list_copy (entry->callback_list);
for (node = new_list; node != NULL; node = node->next) {
PreferencesCallbackEntry *callback_entry = node->data;
g_return_if_fail (callback_entry != NULL);
if (callback_entry->callback == callback &&
callback_entry->callback_data == callback_data) {
entry->callback_list = g_list_remove (entry->callback_list,
callback_entry);
preferences_callback_entry_free (callback_entry);
}
}
g_list_free (new_list);
preferences_entry_check_remove_connection (entry);
}
/**
* preferences_entry_remove_auto_storage
*
* remove an auto-storage variable from a pref entry.
* @preferences_entry: The hash entry.
* @storage: The user-supplied location.
**/
static void
preferences_entry_remove_auto_storage (PreferencesEntry *entry,
gpointer storage)
{
GList *new_list;
const GList *node;
gpointer storage_in_entry;
g_return_if_fail (entry != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (entry->auto_storage_list != NULL);
new_list = g_list_copy (entry->auto_storage_list);
for (node = new_list; node != NULL; node = node->next) {
storage_in_entry = node->data;
g_return_if_fail (storage_in_entry != NULL);
if (storage_in_entry == storage) {
entry->auto_storage_list = g_list_remove (entry->auto_storage_list,
storage);
switch (entry->type) {
case PREFERENCE_STRING:
update_auto_string (storage, NULL);
break;
case PREFERENCE_STRING_LIST:
update_auto_string_list (storage, NULL);
break;
case PREFERENCE_BOOLEAN:
case PREFERENCE_INTEGER:
update_auto_integer_or_boolean (storage, 0);
break;
default:
g_warning ("unexpected preference type %d in preferences_entry_remove_auto_storage", entry->type);
}
}
}
g_list_free (new_list);
preferences_entry_check_remove_connection (entry);
}
/**
* preferences_callback_entry_free
*
* Free a callback info struct.
* @preferences_callback_entry: The struct to free.
**/
static void
preferences_callback_entry_free (PreferencesCallbackEntry *callback_entry)
{
g_return_if_fail (callback_entry != NULL);
callback_entry->callback = NULL;
callback_entry->callback_data = NULL;
g_free (callback_entry);
}
/**
* preferences_callback_entry_free_func
*
* A function that frees a callback info struct. It is meant to be fed to
* g_list_foreach ()
* @data: The list data privately maintained by the GList.
* @callback_data: The callback_data privately maintained by the GList.
**/
static void
preferences_callback_entry_free_func (gpointer data,
gpointer callback_data)
{
g_return_if_fail (data != NULL);
preferences_callback_entry_free (data);
}
/**
* preferences_entry_free
*
* Free a preference hash node's members along with the node itself.
* @preferences_hash_node: The node to free.
**/
static void
preferences_entry_free (PreferencesEntry *entry)
{
g_return_if_fail (entry != NULL);
nautilus_gconf_notification_remove (entry->gconf_connection_id);
entry->gconf_connection_id = NAUTILUS_GCONF_UNDEFINED_CONNECTION;
g_list_free (entry->auto_storage_list);
eel_g_list_free_deep_custom (entry->callback_list,
preferences_callback_entry_free_func,
NULL);
entry->auto_storage_list = NULL;
entry->callback_list = NULL;
g_free (entry->name);
g_free (entry->description);
g_free (entry->enumeration_id);
nautilus_gconf_value_free (entry->cached_value);
g_free (entry);
}
/**
* preferences_entry_free_func
*
* A function that frees a pref hash node. It is meant to be fed to
* g_hash_table_foreach ()
* @key: The hash key privately maintained by the GHashTable.
* @value: The hash value privately maintained by the GHashTable.
* @callback_data: The callback_data privately maintained by the GHashTable.
**/
static void
preferences_entry_free_func (gpointer key,
gpointer value,
gpointer callback_data)
{
g_assert (value != NULL);
preferences_entry_free (value);
}
static void
preferences_global_table_free (void)
{
if (global_table == NULL) {
return;
}
g_hash_table_foreach (global_table, preferences_entry_free_func, NULL);
g_hash_table_destroy (global_table);
global_table = NULL;
g_free (storage_path);
storage_path = NULL;
g_free (defaults_path);
defaults_path = NULL;
g_free (visiblity_path);
visiblity_path = NULL;
}
static GHashTable *
preferences_global_table_get_global (void)
{
static gboolean at_exit_handler_added = FALSE;
if (global_table == NULL) {
global_table = g_hash_table_new (g_str_hash, g_str_equal);
if (!at_exit_handler_added) {
at_exit_handler_added = TRUE;
g_atexit (preferences_global_table_free);
}
}
return global_table;
}
static PreferencesEntry *
preferences_global_table_lookup (const char *name)
{
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_global_table_get_global () != NULL, NULL);
return g_hash_table_lookup (preferences_global_table_get_global (), name);
}
static PreferencesEntry *
preferences_global_table_insert (const char *name)
{
PreferencesEntry *entry;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_global_table_get_global () != NULL, NULL);
g_return_val_if_fail (preferences_global_table_lookup (name) == NULL, NULL);
entry = g_new0 (PreferencesEntry, 1);
entry->name = g_strdup (name);
g_hash_table_insert (preferences_global_table_get_global (), entry->name, entry);
g_return_val_if_fail (entry == preferences_global_table_lookup (name), NULL);
/* Update the cached value for the first time.
*
* We need to do this because checks for value changes
* happen not only as a result of callbacks triggering, but
* also as a result of user_level changes. When a user level
* changes, all the preferences entries are iterated to invoke
* callbacks for those that changed as a result.
*
* See preferences_global_table_check_changes_function().
*/
preferences_entry_update_cached_value (entry);
return entry;
}
static PreferencesEntry *
preferences_global_table_lookup_or_insert (const char *name)
{
PreferencesEntry *entry;
g_return_val_if_fail (name != NULL, NULL);
entry = preferences_global_table_lookup (name);
if (entry != NULL) {
return entry;
}
entry = preferences_global_table_insert (name);
g_assert (entry != NULL);
return entry;
}
void
nautilus_preferences_add_callback (const char *name,
NautilusPreferencesCallback callback,
gpointer callback_data)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (callback != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
preferences_entry_add_callback (entry, callback, callback_data);
}
void
nautilus_preferences_add_auto_string (const char *name,
const char **storage)
{
PreferencesEntry *entry;
char *value;
g_return_if_fail (name != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
preferences_entry_add_auto_storage (entry, storage, PREFERENCE_STRING);
value = nautilus_preferences_get (entry->name);
update_auto_string (storage, value);
g_free (value);
}
void
nautilus_preferences_add_auto_string_list (const char *name,
const EelStringList **storage)
{
PreferencesEntry *entry;
EelStringList *value;
g_return_if_fail (name != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
preferences_entry_add_auto_storage (entry, storage, PREFERENCE_STRING_LIST);
value = nautilus_preferences_get_string_list (entry->name);
update_auto_string_list (storage, value);
eel_string_list_free (value);
}
void
nautilus_preferences_add_auto_integer (const char *name,
int *storage)
{
PreferencesEntry *entry;
int value;
g_return_if_fail (name != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
preferences_entry_add_auto_storage (entry, storage, PREFERENCE_INTEGER);
value = nautilus_preferences_get_integer (entry->name);
update_auto_integer_or_boolean (storage, GINT_TO_POINTER (value));
}
void
nautilus_preferences_add_auto_boolean (const char *name,
gboolean *storage)
{
PreferencesEntry *entry;
gboolean value;
g_return_if_fail (name != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
preferences_entry_add_auto_storage (entry, storage, PREFERENCE_BOOLEAN);
value = nautilus_preferences_get_boolean (entry->name);
update_auto_integer_or_boolean (storage, GINT_TO_POINTER (value));
}
void
nautilus_preferences_remove_auto_string (const char *name,
const char **storage)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup (name);
if (entry == NULL) {
g_warning ("Trying to remove auto-string for %s without adding it first.", name);
return;
}
preferences_entry_remove_auto_storage (entry, storage);
}
void
nautilus_preferences_remove_auto_string_list (const char *name,
const EelStringList **storage)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup (name);
if (entry == NULL) {
g_warning ("Trying to remove auto-string for %s without adding it first.", name);
return;
}
preferences_entry_remove_auto_storage (entry, storage);
}
void
nautilus_preferences_remove_auto_integer (const char *name,
int *storage)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup (name);
if (entry == NULL) {
g_warning ("Trying to remove auto-integer for %s without adding it first.", name);
return;
}
preferences_entry_remove_auto_storage (entry, storage);
}
void
nautilus_preferences_remove_auto_boolean (const char *name,
gboolean *storage)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (storage != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup (name);
if (entry == NULL) {
g_warning ("Trying to remove auto-boolean for %s without adding it first.", name);
return;
}
preferences_entry_remove_auto_storage (entry, storage);
}
typedef struct
{
char *name;
NautilusPreferencesCallback callback;
gpointer callback_data;
} WhileAliveData;
static void
preferences_while_alive_disconnector (GtkObject *object, gpointer callback_data)
{
WhileAliveData *data;
g_return_if_fail (GTK_IS_OBJECT (object));
g_return_if_fail (callback_data != NULL);
data = callback_data;
nautilus_preferences_remove_callback (data->name,
data->callback,
data->callback_data);
g_free (data->name);
g_free (data);
}
void
nautilus_preferences_add_callback_while_alive (const char *name,
NautilusPreferencesCallback callback,
gpointer callback_data,
GtkObject *alive_object)
{
WhileAliveData *data;
g_return_if_fail (name != NULL);
g_return_if_fail (callback != NULL);
g_return_if_fail (GTK_IS_OBJECT (alive_object));
g_return_if_fail (preferences_is_initialized ());
data = g_new (WhileAliveData, 1);
data->name = g_strdup (name);
data->callback = callback;
data->callback_data = callback_data;
nautilus_preferences_add_callback (name, callback, callback_data);
gtk_signal_connect (alive_object,
"destroy",
GTK_SIGNAL_FUNC (preferences_while_alive_disconnector),
data);
}
void
nautilus_preferences_remove_callback (const char *name,
NautilusPreferencesCallback callback,
gpointer callback_data)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (callback != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup (name);
if (entry == NULL) {
g_warning ("Trying to remove a callback for %s without adding it first.", name);
return;
}
preferences_entry_remove_callback (entry, callback, callback_data);
}
void
nautilus_preferences_set_description (const char *name,
const char *description)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (description != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
g_free (entry->description);
entry->description = g_strdup (description);
}
char *
nautilus_preferences_get_description (const char *name)
{
PreferencesEntry *entry;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_is_initialized (), NULL);
entry = preferences_global_table_lookup_or_insert (name);
return g_strdup (entry->description ? entry->description : "");
}
void
nautilus_preferences_set_enumeration_id (const char *name,
const char *enumeration_id)
{
PreferencesEntry *entry;
g_return_if_fail (name != NULL);
g_return_if_fail (enumeration_id != NULL);
g_return_if_fail (preferences_is_initialized ());
entry = preferences_global_table_lookup_or_insert (name);
g_assert (entry != NULL);
g_free (entry->enumeration_id);
entry->enumeration_id = g_strdup (enumeration_id);
}
char *
nautilus_preferences_get_enumeration_id (const char *name)
{
PreferencesEntry *entry;
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (preferences_is_initialized (), NULL);
entry = preferences_global_table_lookup_or_insert (name);
return entry->enumeration_id ? g_strdup (entry->enumeration_id) : NULL;
}
char *
nautilus_preferences_get_user_level_name_for_display (int user_level)
{
g_return_val_if_fail (preferences_is_initialized (), NULL);
user_level = nautilus_preferences_user_level_clamp (user_level);
return g_strdup (gettext (user_level_names_for_display[user_level]));
}
char *
nautilus_preferences_get_user_level_name_for_storage (int user_level)
{
g_return_val_if_fail (preferences_is_initialized (), NULL);
return g_strdup (preferences_peek_user_level_name_for_storage (user_level));
}
int
nautilus_preferences_user_level_clamp (int user_level)
{
g_return_val_if_fail (preferences_is_initialized (), 0);
return CLAMP (user_level, NAUTILUS_USER_LEVEL_NOVICE, NAUTILUS_USER_LEVEL_ADVANCED);
}
gboolean
nautilus_preferences_user_level_is_valid (int user_level)
{
g_return_val_if_fail (preferences_is_initialized (), FALSE);
return user_level == nautilus_preferences_user_level_clamp (user_level);
}
gboolean
nautilus_preferences_monitor_directory (const char *directory)
{
g_return_val_if_fail (preferences_is_initialized (), FALSE);
return nautilus_gconf_monitor_add (directory);
}
gboolean
nautilus_preferences_is_visible (const char *name)
{
int user_level;
int visible_user_level;
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (preferences_is_initialized (), FALSE);
user_level = nautilus_preferences_get_user_level ();
visible_user_level = nautilus_preferences_get_visible_user_level (name);
return visible_user_level <= user_level;
}
static void
preferences_remove_user_level_notice (void)
{
nautilus_gconf_notification_remove (user_level_changed_connection_id);
user_level_changed_connection_id = NAUTILUS_GCONF_UNDEFINED_CONNECTION;
}
void
nautilus_preferences_initialize (const char *path)
{
g_return_if_fail (eel_strlen (path) > 0);
if (initialized) {
return;
}
initialized = TRUE;
user_level_changed_connection_id = nautilus_gconf_notification_add (USER_LEVEL_KEY,
preferences_user_level_changed_notice,
NULL);
g_atexit (preferences_remove_user_level_notice);
preferences_set_storage_path (path);
}
#if !defined (NAUTILUS_OMIT_SELF_CHECK)
#define CONSTANT_STORAGE_PATH "/apps/self-check-nautilus"
#define CHECK_BOOLEAN(name__, value__) \
G_STMT_START { \
nautilus_preferences_set_boolean ((name__), (value__)); \
EEL_CHECK_BOOLEAN_RESULT (nautilus_preferences_get_boolean (name__), (value__)); \
} G_STMT_END
#define CHECK_INTEGER(name__, value__) \
G_STMT_START { \
nautilus_preferences_set_integer ((name__), (value__)); \
EEL_CHECK_INTEGER_RESULT (nautilus_preferences_get_integer (name__), (value__)); \
} G_STMT_END
#define CHECK_STRING(name__, value__) \
G_STMT_START { \
nautilus_preferences_set ((name__), (value__)); \
EEL_CHECK_STRING_RESULT (nautilus_preferences_get (name__), (value__)); \
} G_STMT_END
void
nautilus_self_check_preferences (void)
{
int original_user_level;
original_user_level = nautilus_preferences_get_user_level ();
EEL_CHECK_INTEGER_RESULT (nautilus_preferences_get_integer ("self-check/neverset/i"), 0);
EEL_CHECK_STRING_RESULT (nautilus_preferences_get ("self-check/neverset/s"), "");
EEL_CHECK_BOOLEAN_RESULT (nautilus_preferences_get_boolean ("self-check/neverset/b"), FALSE);
nautilus_preferences_set_user_level (0);
CHECK_INTEGER ("self-check/i", 666);
CHECK_BOOLEAN ("self-check/b", TRUE);
CHECK_STRING ("self-check/s", "foo");
/* Restore the original user level */
nautilus_preferences_set_user_level (original_user_level);
}
#endif /* !NAUTILUS_OMIT_SELF_CHECK */
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