/* ATK -  Accessibility Toolkit

 * Copyright 2001 Sun Microsystems Inc.

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

#include "config.h"

#include "atk.h"

#include <string.h>

/**

 * SECTION:atkstate

 * @Short_description: An AtkState describes a single state of an object.

 * @Title:AtkState

 *

 * An AtkState describes a single state of an object. The full set of states

 * that apply to an object at a given time are contained in its #AtkStateSet.

 * See also #atk_object_ref_state_set and #atk_object_notify_state_change.

 */

static guint last_type = ATK_STATE_LAST_DEFINED;

#define NUM_POSSIBLE_STATES               (sizeof(AtkState)*8)

static gchar* state_names[NUM_POSSIBLE_STATES];

/**

 * atk_state_type_register:

 * @name: a character string describing the new state.

 *

 * Register a new object state.

 *

 * Returns: an #AtkState value for the new state.

 **/

AtkStateType

atk_state_type_register (const gchar *name)

{

  g_return_val_if_fail (name, ATK_STATE_INVALID);

  if (last_type < NUM_POSSIBLE_STATES -1)

    {

      state_names[++last_type] = g_strdup (name); 

      return (last_type);

    }

  return ATK_STATE_INVALID; /* caller needs to check */

}

/**

 * atk_state_type_get_name:

 * @type: The #AtkStateType whose name is required

 *

 * Gets the description string describing the #AtkStateType @type.

 *

 * Returns: the string describing the AtkStateType

 */

const gchar*

atk_state_type_get_name (AtkStateType type)

{

  GTypeClass *type_class;

  GEnumValue *value;

  const gchar *name = NULL;

  type_class = g_type_class_ref (ATK_TYPE_STATE_TYPE);

  g_return_val_if_fail (G_IS_ENUM_CLASS (type_class), NULL);

  value = g_enum_get_value (G_ENUM_CLASS (type_class), type);

  if (value)

    {

      name = value->value_nick;

    }

  else

    {

      if (type <= last_type)

        {

          if (type >= 0)

            name = state_names[type];

        }

    }

  g_type_class_unref (type_class);

  return name;

}

/**

 * atk_state_type_for_name:

 * @name: a character string state name

 *

 * Gets the #AtkStateType corresponding to the description string @name.

 *

 * Returns: an #AtkStateType corresponding to @name 

 */

AtkStateType

atk_state_type_for_name (const gchar *name)

{

  GTypeClass *type_class;

  GEnumValue *value;

  AtkStateType type = ATK_STATE_INVALID;

  g_return_val_if_fail (name, ATK_STATE_INVALID);

  type_class = g_type_class_ref (ATK_TYPE_STATE_TYPE);

  g_return_val_if_fail (G_IS_ENUM_CLASS (type_class), ATK_STATE_INVALID);

  value = g_enum_get_value_by_nick (G_ENUM_CLASS (type_class), name);

  if (value)

    {

      type = value->value;

    }

  else

    {

      gint i;

      for (i = ATK_STATE_LAST_DEFINED + 1; i <= last_type; i++)

        {

          if (state_names[i] == NULL)

            continue; 

          if (!strcmp(name, state_names[i])) 

            {

              type = i;

              break;

            }

        }

    }

  return type;

}