atk/atkstate.c

   1 /* ATK -  Accessibility Toolkit
   2  * Copyright 2001 Sun Microsystems Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "atkstate.h"
  21 #include "atk-enum-types.h"
  22
  23 #include <string.h>
  24
  25 static guint last_type = ATK_STATE_LAST_DEFINED;
  26
  27 #define NUM_POSSIBLE_STATES               (sizeof(AtkState)*8)
  28
  29 static gchar* state_names[NUM_POSSIBLE_STATES];
  30
  31 /**
  32  * atk_state_type_register:
  33  * @name: a character string describing the new state.
  34  *
  35  * Register a new object state.
  36  *
  37  * Returns: an #AtkState value for the new state.
  38  **/
  39 AtkStateType
  40 atk_state_type_register (const gchar *name)
  41 {
  42   g_return_val_if_fail (name, ATK_STATE_INVALID);
  43
  44   if (last_type < NUM_POSSIBLE_STATES -1)
  45     {
  46       state_names[++last_type] = g_strdup (name);
  47       return (last_type);
  48     }
  49   return ATK_STATE_INVALID; /* caller needs to check */
  50 }
  51
  52 /**
  53  * atk_state_type_get_name:
  54  * @type: The #AtkStateType whose name is required
  55  *
  56  * Gets the description string describing the #AtkStateType @type.
  57  *
  58  * Returns: the string describing the AtkStateType
  59  */
  60 G_CONST_RETURN gchar*
  61 atk_state_type_get_name (AtkStateType type)
  62 {
  63   GTypeClass *type_class;
  64   GEnumValue *value;
  65   gchar *name = NULL;
  66
  67   type_class = g_type_class_ref (ATK_TYPE_STATE_TYPE);
  68   g_return_val_if_fail (G_IS_ENUM_CLASS (type_class), NULL);
  69
  70   value = g_enum_get_value (G_ENUM_CLASS (type_class), type);
  71
  72   if (value)
  73     {
  74       name = value->value_nick;
  75     }
  76   else
  77     {
  78       if (type <= last_type)
  79         {
  80           if (type >= 0)
  81             name = state_names[type];
  82         }
  83     }
  84
  85   return name;
  86 }
  87
  88 /**
  89  * atk_state_type_for_name:
  90  * @name: a character string state name
  91  *
  92  * Gets the #AtkStateType corresponding to the description string @name.
  93  *
  94  * Returns: an #AtkStateType corresponding to @name
  95  */
  96 AtkStateType
  97 atk_state_type_for_name (const gchar *name)
  98 {
  99   GTypeClass *type_class;
 100   GEnumValue *value;
 101   AtkStateType type = ATK_STATE_INVALID;
 102
 103   g_return_val_if_fail (name, ATK_STATE_INVALID);
 104
 105   type_class = g_type_class_ref (ATK_TYPE_STATE_TYPE);
 106   g_return_val_if_fail (G_IS_ENUM_CLASS (type_class), ATK_STATE_INVALID);
 107
 108   value = g_enum_get_value_by_nick (G_ENUM_CLASS (type_class), name);
 109
 110   if (value)
 111     {
 112       type = value->value;
 113     }
 114   else
 115     {
 116       gint i;
 117
 118       for (i = ATK_STATE_LAST_DEFINED + 1; i <= last_type; i++)
 119         {
 120           if (state_names[i] == NULL)
 121             continue;
 122           if (!strcmp(name, state_names[i]))
 123             {
 124               type = i;
 125               break;
 126             }
 127         }
 128     }
 129   return type;
 130 }