path: root/lib/eel-gconf-extensions.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/* eel-gconf-extensions.c - Stuff to make GConf easier to use.

   Copyright (C) 2000, 2001 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 "eel-gconf-extensions.h"

#include <bonobo/bonobo-i18n.h>
#include <gconf/gconf-client.h>
#include <gconf/gconf.h>
#include <string.h>

static GConfClient *global_gconf_client = NULL;

static void
global_client_free (void)
{
    if (global_gconf_client == NULL) {
        return;
    }
    
    g_object_unref (global_gconf_client);
    global_gconf_client = NULL;
}

/* Public */
GConfClient *
eel_gconf_client_get_global (void)
{
    /* Initialize gconf if needed */
    if (!gconf_is_initialized ()) {
        char *argv[] = { "eel-preferences", NULL };
        GError *error = NULL;
        
        if (!gconf_init (1, argv, &error)) {
            if (eel_gconf_handle_error (&error)) {
                return NULL;
            }
        }
    }
    
    if (global_gconf_client == NULL) {
        global_gconf_client = gconf_client_get_default ();
        g_atexit (global_client_free);
    }
    
    return global_gconf_client;
}

gboolean
eel_gconf_handle_error (GError **error)
{
    char *message;
    static gboolean shown_dialog = FALSE;
    
    g_return_val_if_fail (error != NULL, FALSE);

    if (*error != NULL) {
        g_warning (_("GConf error:\n  %s"), (*error)->message);
        if (! shown_dialog) {
            shown_dialog = TRUE;

            message = g_strdup_printf (_("GConf error:\n  %s\n"
                             "All further errors shown "
                             "only on terminal"),
                           (*error)->message);
            g_error (message, _("GConf Error"), NULL);
            g_free (message);
        }
        g_error_free (*error);
        *error = NULL;

        return TRUE;
    }

    return FALSE;
}

void
eel_gconf_set_boolean (const char *key,
                gboolean boolean_value)
{
    GConfClient *client;
    GError *error = NULL;
    
    g_return_if_fail (key != NULL);

    client = eel_gconf_client_get_global ();
    g_return_if_fail (client != NULL);
    
    gconf_client_set_bool (client, key, boolean_value, &error);
    eel_gconf_handle_error (&error);
}

gboolean
eel_gconf_get_boolean (const char *key)
{
    gboolean result;
    GConfClient *client;
    GError *error = NULL;
    
    g_return_val_if_fail (key != NULL, FALSE);
    
    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, FALSE);
    
    result = gconf_client_get_bool (client, key, &error);
    
    if (eel_gconf_handle_error (&error)) {
        result = FALSE;
    }
    
    return result;
}

void
eel_gconf_set_integer (const char *key,
                int int_value)
{
    GConfClient *client;
    GError *error = NULL;

    g_return_if_fail (key != NULL);

    client = eel_gconf_client_get_global ();
    g_return_if_fail (client != NULL);

    gconf_client_set_int (client, key, int_value, &error);
    eel_gconf_handle_error (&error);
}

int
eel_gconf_get_integer (const char *key)
{
    int result;
    GConfClient *client;
    GError *error = NULL;
    
    g_return_val_if_fail (key != NULL, 0);
    
    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, 0);
    
    result = gconf_client_get_int (client, key, &error);

    if (eel_gconf_handle_error (&error)) {
        result = 0;
    }

    return result;
}

void
eel_gconf_set_string (const char *key,
               const char *string_value)
{
    GConfClient *client;
    GError *error = NULL;

    g_return_if_fail (key != NULL);

    client = eel_gconf_client_get_global ();
    g_return_if_fail (client != NULL);
    
    gconf_client_set_string (client, key, string_value, &error);
    eel_gconf_handle_error (&error);
}

char *
eel_gconf_get_string (const char *key)
{
    char *result;
    GConfClient *client;
    GError *error = NULL;
    
    g_return_val_if_fail (key != NULL, NULL);
    
    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, NULL);
    
    result = gconf_client_get_string (client, key, &error);
    
    if (eel_gconf_handle_error (&error)) {
        result = g_strdup ("");
    }
    
    return result;
}

void
eel_gconf_set_string_list (const char *key,
                const GSList *slist)
{
    GConfClient *client;
    GError *error;

    g_return_if_fail (key != NULL);

    client = eel_gconf_client_get_global ();
    g_return_if_fail (client != NULL);

    error = NULL;
    gconf_client_set_list (client, key, GCONF_VALUE_STRING,
                   /* Need cast cause of GConf api bug */
                   (GSList *) slist,
                   &error);
    eel_gconf_handle_error (&error);
}

GSList *
eel_gconf_get_string_list (const char *key)
{
    GSList *slist;
    GConfClient *client;
    GError *error;
    
    g_return_val_if_fail (key != NULL, NULL);
    
    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, NULL);
    
    error = NULL;
    slist = gconf_client_get_list (client, key, GCONF_VALUE_STRING, &error);
    if (eel_gconf_handle_error (&error)) {
        slist = NULL;
    }

    return slist;
}

gboolean
eel_gconf_is_default (const char *key)
{
    gboolean result;
    GConfValue *value;
    GError *error = NULL;
    
    g_return_val_if_fail (key != NULL, FALSE);
    
    value = gconf_client_get_without_default  (eel_gconf_client_get_global (), key, &error);

    if (eel_gconf_handle_error (&error)) {
        if (value != NULL) {
            gconf_value_free (value);
        }
        return FALSE;
    }

    result = (value == NULL);
    eel_gconf_value_free (value);
    return result;
}

gboolean
eel_gconf_key_is_writable (const char *key)
{
    gboolean result;
    GError *error = NULL;
    
    g_return_val_if_fail (key != NULL, FALSE);
    
    result = gconf_client_key_is_writable  (eel_gconf_client_get_global (), key, &error);

    if (eel_gconf_handle_error (&error)) {
        return result;
    }

    return result;
}

gboolean
eel_gconf_monitor_add (const char *directory)
{
    GError *error = NULL;
    GConfClient *client;

    g_return_val_if_fail (directory != NULL, FALSE);

    client = gconf_client_get_default ();
    g_return_val_if_fail (client != NULL, FALSE);

    gconf_client_add_dir (client,
                  directory,
                  GCONF_CLIENT_PRELOAD_NONE,
                  &error);
    
    if (eel_gconf_handle_error (&error)) {
        return FALSE;
    }

    return TRUE;
}

gboolean
eel_gconf_monitor_remove (const char *directory)
{
    GError *error = NULL;
    GConfClient *client;

    if (directory == NULL) {
        return FALSE;
    }

    client = gconf_client_get_default ();
    g_return_val_if_fail (client != NULL, FALSE);
    
    gconf_client_remove_dir (client,
                 directory,
                 &error);
    
    if (eel_gconf_handle_error (&error)) {
        return FALSE;
    }
    
    return TRUE;
}

void
eel_gconf_preload_cache (const char             *directory,
             GConfClientPreloadType  preload_type)
{
    GError *error = NULL;
    GConfClient *client;

    if (directory == NULL) {
        return;
    }

    client = gconf_client_get_default ();
    g_return_if_fail (client != NULL);
    
    gconf_client_preload (client,
                  directory,
                  preload_type,
                  &error);
    
    eel_gconf_handle_error (&error);
}

void
eel_gconf_suggest_sync (void)
{
    GConfClient *client;
    GError *error = NULL;

    client = eel_gconf_client_get_global ();
    g_return_if_fail (client != NULL);
    
    gconf_client_suggest_sync (client, &error);
    eel_gconf_handle_error (&error);
}

GConfValue*
eel_gconf_get_value (const char *key)
{
    GConfValue *value = NULL;
    GConfClient *client;
    GError *error = NULL;

    g_return_val_if_fail (key != NULL, NULL);

    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, NULL);

    value = gconf_client_get (client, key, &error);
    
    if (eel_gconf_handle_error (&error)) {
        if (value != NULL) {
            gconf_value_free (value);
            value = NULL;
        }
    }

    return value;
}

GConfValue*
eel_gconf_get_default_value (const char *key)
{
    GConfValue *value = NULL;
    GConfClient *client;
    GError *error = NULL;
    
    g_return_val_if_fail (key != NULL, NULL);

    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, NULL);

    value = gconf_client_get_default_from_schema (client, key, &error);
    
    if (eel_gconf_handle_error (&error)) {
        if (value != NULL) {
            gconf_value_free (value);
            value = NULL;
        }
    }

    return value;
}

static int
eel_strcmp (const char *string_a, const char *string_b)
{
    /* FIXME bugzilla.eazel.com 5450: Maybe we need to make this
     * treat 'NULL < ""', or have a flavor that does that. If we
     * didn't have code that already relies on 'NULL == ""', I
     * would change it right now.
     */
    return strcmp (string_a == NULL ? "" : string_a,
               string_b == NULL ? "" : string_b);
}

static gboolean
eel_str_is_equal (const char *string_a, const char *string_b)
{
    /* FIXME bugzilla.eazel.com 5450: Maybe we need to make this
     * treat 'NULL != ""', or have a flavor that does that. If we
     * didn't have code that already relies on 'NULL == ""', I
     * would change it right now.
     */
    return eel_strcmp (string_a, string_b) == 0;
}

static gboolean
simple_value_is_equal (const GConfValue *a,
               const GConfValue *b)
{
    g_return_val_if_fail (a != NULL, FALSE);
    g_return_val_if_fail (b != NULL, FALSE);

    switch (a->type) {
    case GCONF_VALUE_STRING:
        return eel_str_is_equal (gconf_value_get_string (a),
                     gconf_value_get_string (b));
        break;

    case GCONF_VALUE_INT:
        return gconf_value_get_int (a) ==
            gconf_value_get_int (b);
        break;

    case GCONF_VALUE_FLOAT:
        return gconf_value_get_float (a) ==
            gconf_value_get_float (b);
        break;

    case GCONF_VALUE_BOOL:
        return gconf_value_get_bool (a) ==
            gconf_value_get_bool (b);
        break;
    default:
        g_assert_not_reached ();
    }
    
    return FALSE;
}

gboolean
eel_gconf_value_is_equal (const GConfValue *a,
                   const GConfValue *b)
{
    GSList *node_a;
    GSList *node_b;

    if (a == NULL && b == NULL) {
        return TRUE;
    }

    if (a == NULL || b == NULL) {
        return FALSE;
    }

    if (a->type != b->type) {
        return FALSE;
    }

    switch (a->type) {
    case GCONF_VALUE_STRING:
    case GCONF_VALUE_INT:
    case GCONF_VALUE_FLOAT:
    case GCONF_VALUE_BOOL:
        return simple_value_is_equal (a, b);
        break;
        
    case GCONF_VALUE_LIST:
        if (gconf_value_get_list_type (a) !=
            gconf_value_get_list_type (b)) {
            return FALSE;
        }

        node_a = gconf_value_get_list (a);
        node_b = gconf_value_get_list (b);
        
        if (node_a == NULL && node_b == NULL) {
            return TRUE;
        }

        if (g_slist_length (node_a) !=
            g_slist_length (node_b)) {
            return FALSE;
        }
        
        for (;
             node_a != NULL && node_b != NULL;
             node_a = node_a->next, node_b = node_b->next) {
            g_assert (node_a->data != NULL);
            g_assert (node_b->data != NULL);
            if (!simple_value_is_equal (node_a->data, node_b->data)) {
                return FALSE;
            }
        }
        
        return TRUE;
    default:
        /* FIXME: pair ? */
        g_assert (0);
    }
    
    g_assert_not_reached ();
    return FALSE;
}

void
eel_gconf_value_free (GConfValue *value)
{
    if (value == NULL) {
        return;
    }
    
    gconf_value_free (value);
}

guint
eel_gconf_notification_add (const char *key,
                 GConfClientNotifyFunc notification_callback,
                 gpointer callback_data)
{
    guint notification_id;
    GConfClient *client;
    GError *error = NULL;
    
    g_return_val_if_fail (key != NULL, EEL_GCONF_UNDEFINED_CONNECTION);
    g_return_val_if_fail (notification_callback != NULL, EEL_GCONF_UNDEFINED_CONNECTION);

    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, EEL_GCONF_UNDEFINED_CONNECTION);
    
    notification_id = gconf_client_notify_add (client,
                           key,
                           notification_callback,
                           callback_data,
                           NULL,
                           &error);
    
    if (eel_gconf_handle_error (&error)) {
        if (notification_id != EEL_GCONF_UNDEFINED_CONNECTION) {
            gconf_client_notify_remove (client, notification_id);
            notification_id = EEL_GCONF_UNDEFINED_CONNECTION;
        }
    }
    
    return notification_id;
}

void
eel_gconf_notification_remove (guint notification_id)
{
    GConfClient *client;

    if (notification_id == EEL_GCONF_UNDEFINED_CONNECTION) {
        return;
    }
    
    client = eel_gconf_client_get_global ();
    g_return_if_fail (client != NULL);

    gconf_client_notify_remove (client, notification_id);
}

GSList *
eel_gconf_value_get_string_list (const GConfValue *value)
{
    GSList *result;
    const GSList *slist;
    const GSList *node;
    const char *string;
    const GConfValue *next_value;

    if (value == NULL) {
        return NULL;
    }

    g_return_val_if_fail (value->type == GCONF_VALUE_LIST, NULL);
    g_return_val_if_fail (gconf_value_get_list_type (value) == GCONF_VALUE_STRING, NULL);

    slist = gconf_value_get_list (value);
    result = NULL;
    for (node = slist; node != NULL; node = node->next) {
        next_value = node->data;
        g_return_val_if_fail (next_value != NULL, NULL);
        g_return_val_if_fail (next_value->type == GCONF_VALUE_STRING, NULL);
        string = gconf_value_get_string (next_value);
        result = g_slist_append (result, g_strdup (string));
    }
    return result;
}

void
eel_gconf_value_set_string_list (GConfValue *value,
                 const GSList *string_list)
{
    const GSList *node;
    GConfValue *next_value;
    GSList *value_list;

    g_return_if_fail (value->type == GCONF_VALUE_LIST);
    g_return_if_fail (gconf_value_get_list_type (value) == GCONF_VALUE_STRING);

    value_list = NULL;
    for (node = string_list; node != NULL; node = node->next) {
        next_value = gconf_value_new (GCONF_VALUE_STRING);
        gconf_value_set_string (next_value, node->data);
        value_list = g_slist_append (value_list, next_value);
    }

    gconf_value_set_list (value, value_list);

    for (node = value_list; node != NULL; node = node->next) {
        gconf_value_free (node->data);
    }
    g_slist_free (value_list);
}

void
eel_gconf_set_float (const char *key,
                gfloat float_value)
{
    GConfClient *client;
    GError *error = NULL;

    g_return_if_fail (key != NULL);

    client = eel_gconf_client_get_global ();
    g_return_if_fail (client != NULL);

    gconf_client_set_float (client, key, float_value, &error);
    eel_gconf_handle_error (&error);
}

gfloat
eel_gconf_get_float (const char *key)
{
    gfloat result;
    GConfClient *client;
    GError *error = NULL;
    
    g_return_val_if_fail (key != NULL, 0);
    
    client = eel_gconf_client_get_global ();
    g_return_val_if_fail (client != NULL, 0);
    
    result = gconf_client_get_float (client, key, &error);

    if (eel_gconf_handle_error (&error)) {
        result = 0;
    }

    return result;
}