atk/atknoopobjectfactory.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 "atkobject.h"
  21 #include "atknoopobject.h"
  22 #include "atknoopobjectfactory.h"
  23
  24 /**
  25  * SECTION:atknoopobjectfactory
  26  * @Short_description: The AtkObjectFactory which creates an AtkNoOpObject.
  27  * @Title:AtkNoOpObjectFactory
  28  *
  29  * The AtkObjectFactory which creates an AtkNoOpObject. An instance of
  30  * this is created by an AtkRegistry if no factory type has not been
  31  * specified to create an accessible object of a particular type.
  32  */
  33 static void atk_no_op_object_factory_class_init (
  34                               AtkNoOpObjectFactoryClass        *klass);
  35
  36 static AtkObject* atk_no_op_object_factory_create_accessible (
  37                               GObject                          *obj);
  38 static GType      atk_no_op_object_factory_get_accessible_type (void);
  39
  40 static gpointer    parent_class = NULL;
  41
  42 GType
  43 atk_no_op_object_factory_get_type (void)
  44 {
  45   static GType type = 0;
  46
  47   if (!type)
  48   {
  49     static const GTypeInfo tinfo =
  50     {
  51       sizeof (AtkNoOpObjectFactoryClass),
  52       (GBaseInitFunc) NULL, /* base init */
  53       (GBaseFinalizeFunc) NULL, /* base finalize */
  54       (GClassInitFunc) atk_no_op_object_factory_class_init, /* class init */
  55       (GClassFinalizeFunc) NULL, /* class finalize */
  56       NULL, /* class data */
  57       sizeof (AtkNoOpObjectFactory), /* instance size */
  58       0, /* nb preallocs */
  59       (GInstanceInitFunc) NULL, /* instance init */
  60       NULL /* value table */
  61     };
  62     type = g_type_register_static (
  63                            ATK_TYPE_OBJECT_FACTORY,
  64                            "AtkNoOpObjectFactory" , &tinfo, 0);
  65   }
  66
  67   return type;
  68 }
  69
  70 static void
  71 atk_no_op_object_factory_class_init (AtkNoOpObjectFactoryClass *klass)
  72 {
  73   AtkObjectFactoryClass *class = ATK_OBJECT_FACTORY_CLASS (klass);
  74
  75   parent_class = g_type_class_peek_parent (klass);
  76
  77   class->create_accessible = atk_no_op_object_factory_create_accessible;
  78   class->get_accessible_type = atk_no_op_object_factory_get_accessible_type;
  79 }
  80
  81 /**
  82  * atk_no_op_object_factory_new:
  83  *
  84  * Creates an instance of an #AtkObjectFactory which generates primitive
  85  * (non-functioning) #AtkObjects.
  86  *
  87  * Returns: an instance of an #AtkObjectFactory
  88  **/
  89 AtkObjectFactory*
  90 atk_no_op_object_factory_new (void)
  91 {
  92   GObject *factory;
  93
  94   factory = g_object_new (ATK_TYPE_NO_OP_OBJECT_FACTORY, NULL);
  95
  96   g_return_val_if_fail (factory != NULL, NULL);
  97   return ATK_OBJECT_FACTORY (factory);
  98 }
  99
 100 static AtkObject*
 101 atk_no_op_object_factory_create_accessible (GObject   *obj)
 102 {
 103   AtkObject     *accessible;
 104
 105   accessible = atk_no_op_object_new (obj);
 106
 107   return accessible;
 108 }
 109
 110 static GType
 111 atk_no_op_object_factory_get_accessible_type (void)
 112 {
 113   return ATK_TYPE_NO_OP_OBJECT;
 114 }