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/* Evolution calendar - Configuration values for the alarm notification daemon
 *
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Authors: Federico Mena-Quintero <federico@ximian.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIOH
#include <config.h>
#endif

#include "config-data.h"
#include "save.h"



/* Whether we have initied ourselves by reading the data from the configuration engine */
static gboolean inited = FALSE;
static EConfigListener *config;



/* Copied from ../calendar-config.c; returns whether the locale has 'am' and
 * 'pm' strings defined.
 */
static gboolean
locale_supports_12_hour_format (void)
{
    char s[16];
    time_t t = 0;

    strftime (s, sizeof s, "%p", gmtime (&t));
    return s[0] != '\0';
}

static void
do_cleanup (void)
{
    g_object_unref (config);
    config = NULL;
    inited = FALSE;
}

/* Ensures that the configuration values have been read */
static void
ensure_inited (void)
{
    if (inited)
        return;

    inited = TRUE;

    config = e_config_listener_new ();
    if (!E_IS_CONFIG_LISTENER (config)) {
        inited = FALSE;
        return;
    }

    g_atexit ((GVoidFunc) do_cleanup);
}

EConfigListener *
config_data_get_listener (void)
{
    ensure_inited ();
    return config;
}

icaltimezone *
config_data_get_timezone (void)
{
    char *location;
    icaltimezone *local_timezone;

    ensure_inited ();

    location = e_config_listener_get_string_with_default (config, 
                                  "/apps/evolution/calendar/display/timezone",
                                  "UTC", NULL);
    if (location && location[0]) {
        local_timezone = icaltimezone_get_builtin_timezone (location);
    } else {
        local_timezone = icaltimezone_get_utc_timezone ();
    }

    g_free (location);

    return local_timezone;
}

gboolean
config_data_get_24_hour_format (void)
{
    ensure_inited ();

    if (locale_supports_12_hour_format ()) {
        return e_config_listener_get_boolean_with_default (
            config,
            "/apps/evolution/calendar/display/use_24hour_format", FALSE, NULL);
    }

    return TRUE;
}