/* $Id$ */
/*-
 * Copyright (c) 2004-2006 os-cillation e.K.
 *
 * Written by Benedikt Meurer <benny@xfce.org>.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * 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_CONFIG_H
#include <config.h>
#endif

#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif

#include <exo/exo.h>

#include <thunar/thunar-gobject-extensions.h>



static void transform_string_to_boolean (const GValue *src, GValue *dst);
static void transform_string_to_enum    (const GValue *src, GValue *dst);
static void transform_string_to_int     (const GValue *src, GValue *dst);
static void transform_string_to_uint    (const GValue *src, GValue *dst);



static void
transform_string_to_boolean (const GValue *src,
                             GValue       *dst)
{
  g_value_set_boolean (dst, strcmp (g_value_get_string (src), "FALSE") != 0);
}



static void
transform_string_to_enum (const GValue *src,
                          GValue       *dst)
{
  GEnumClass *klass;
  gint        value = 0;
  guint       n;

  /* determine the enum value matching the src... */
  klass = g_type_class_ref (G_VALUE_TYPE (dst));
  for (n = 0; n < klass->n_values; ++n)
    {
      value = klass->values[n].value;
      if (exo_str_is_equal (klass->values[n].value_name, g_value_get_string (src)))
        break;
    }
  g_type_class_unref (klass);

  /* ...and return that value */
  g_value_set_enum (dst, value);
}



static void
transform_string_to_int (const GValue *src,
                         GValue       *dst)
{
  g_value_set_int (dst, (gint) strtol (g_value_get_string (src), NULL, 10));
}



static void
transform_string_to_uint (const GValue *src,
                          GValue       *dst)
{
  g_value_set_uint (dst, (guint) strtoul (g_value_get_string (src), NULL, 10));
}



/**
 * thunar_g_initialize_transformations:
 *
 * Registers various transformation functions to the
 * GLib Type System, which are used by g_value_transform()
 * to transform between different kinds of values.
 **/
void
thunar_g_initialize_transformations (void)
{
  if (!g_value_type_transformable (G_TYPE_STRING, G_TYPE_BOOLEAN))
    g_value_register_transform_func (G_TYPE_STRING, G_TYPE_BOOLEAN, transform_string_to_boolean);
  if (!g_value_type_transformable (G_TYPE_STRING, G_TYPE_INT))
    g_value_register_transform_func (G_TYPE_STRING, G_TYPE_INT, transform_string_to_int);
  if (!g_value_type_transformable (G_TYPE_STRING, G_TYPE_UINT))
    g_value_register_transform_func (G_TYPE_STRING, G_TYPE_UINT, transform_string_to_uint);

  /* register a transformation function string->enum unconditionally */
  g_value_register_transform_func (G_TYPE_STRING, G_TYPE_ENUM, transform_string_to_enum);
}
