/* The GIMP -- an image manipulation program
 * Copyright (C) 1995-1999 Spencer Kimball and Peter Mattis
 *
 * gimp-contexts.c
 *
 * 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.
 */

#include "config.h"

#include <errno.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <glib/gstdio.h>
#include <glib-object.h>

#include "libgimpbase/gimpbase.h"
#include "libgimpconfig/gimpconfig.h"

#include "core-types.h"

#include "gimp.h"
#include "gimp-contexts.h"
#include "gimpcontext.h"

#include "config/gimpconfig-file.h"

#include "gimp-intl.h"


void
gimp_contexts_init (Gimp *gimp)
{
  GimpContext *context;

  g_return_if_fail (GIMP_IS_GIMP (gimp));

  /*  the default context contains the user's saved preferences
   *
   *  TODO: load from disk
   */
  context = gimp_context_new (gimp, "Default", NULL);
  gimp_set_default_context (gimp, context);
  g_object_unref (context);

  /*  the initial user_context is a straight copy of the default context
   */
  context = gimp_context_new (gimp, "User", context);
  gimp_set_user_context (gimp, context);
  g_object_unref (context);
}

void
gimp_contexts_exit (Gimp *gimp)
{
  g_return_if_fail (GIMP_IS_GIMP (gimp));

  gimp_set_user_context (gimp, NULL);
  gimp_set_default_context (gimp, NULL);
}

void
gimp_contexts_load (Gimp *gimp)
{
  gchar  *filename;
  GError *error = NULL;

  g_return_if_fail (GIMP_IS_GIMP (gimp));

  filename = gimp_personal_rc_file ("contextrc");

  if (gimp->be_verbose)
    g_print ("Parsing '%s'\n", gimp_filename_to_utf8 (filename));

  if (! gimp_config_deserialize_file (GIMP_CONFIG (gimp_get_user_context (gimp)),
                                      filename,
                                      NULL, &error))
    {
      if (error->code != GIMP_CONFIG_ERROR_OPEN_ENOENT)
        g_message (error->message);
      g_error_free (error);
    }

  g_free (filename);
}

void
gimp_contexts_save (Gimp *gimp)
{
  gchar  *filename;
  GError *error = NULL;

  g_return_if_fail (GIMP_IS_GIMP (gimp));

  filename = gimp_personal_rc_file ("contextrc");

  if (gimp->be_verbose)
    g_print ("Writing '%s'\n", gimp_filename_to_utf8 (filename));

  if (! gimp_config_serialize_to_file (GIMP_CONFIG (gimp_get_user_context (gimp)),
                                       filename,
                                       "GIMP user context",
                                       "end of user context",
                                       NULL, &error))
    {
      g_message (error->message);
      g_error_free (error);
    }

  g_free (filename);
}

gboolean
gimp_contexts_clear (Gimp    *gimp,
                     GError **error)
{
  gchar    *filename;
  gboolean  success = TRUE;

  g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);

  filename = gimp_personal_rc_file ("contextrc");

  if (g_unlink (filename) != 0 && errno != ENOENT)
    {
      g_set_error (error, 0, 0, _("Deleting \"%s\" failed: %s"),
                   gimp_filename_to_utf8 (filename), g_strerror (errno));
      success = FALSE;
    }

  g_free (filename);

  return success;
}