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 "config.h"
  21
  22 #include "atkobject.h"
  23 #include "atknoopobject.h"
  24 #include "atknoopobjectfactory.h"
  25
  26 /**
  27  * SECTION:atknoopobjectfactory
  28  * @Short_description: The AtkObjectFactory which creates an AtkNoOpObject.
  29  * @Title:AtkNoOpObjectFactory
  30  *
  31  * The AtkObjectFactory which creates an AtkNoOpObject. An instance of
  32  * this is created by an AtkRegistry if no factory type has not been
  33  * specified to create an accessible object of a particular type.
  34  */
  35 static void atk_no_op_object_factory_class_init (
  36                               AtkNoOpObjectFactoryClass        *klass);
  37
  38 static AtkObject* atk_no_op_object_factory_create_accessible (
  39                               GObject                          *obj);
  40 static GType      atk_no_op_object_factory_get_accessible_type (void);
  41
  42 static gpointer    parent_class = NULL;
  43
  44 GType
  45 atk_no_op_object_factory_get_type (void)
  46 {
  47   static GType type = 0;
  48
  49   if (!type)
  50   {
  51     static const GTypeInfo tinfo =
  52     {
  53       sizeof (AtkNoOpObjectFactoryClass),
  54       (GBaseInitFunc) NULL, /* base init */
  55       (GBaseFinalizeFunc) NULL, /* base finalize */
  56       (GClassInitFunc) atk_no_op_object_factory_class_init, /* class init */
  57       (GClassFinalizeFunc) NULL, /* class finalize */
  58       NULL, /* class data */
  59       sizeof (AtkNoOpObjectFactory), /* instance size */
  60       0, /* nb preallocs */
  61       (GInstanceInitFunc) NULL, /* instance init */
  62       NULL /* value table */
  63     };
  64     type = g_type_register_static (
  65                            ATK_TYPE_OBJECT_FACTORY,
  66                            "AtkNoOpObjectFactory" , &tinfo, 0);
  67   }
  68
  69   return type;
  70 }
  71
  72 static void
  73 atk_no_op_object_factory_class_init (AtkNoOpObjectFactoryClass *klass)
  74 {
  75   AtkObjectFactoryClass *class = ATK_OBJECT_FACTORY_CLASS (klass);
  76
  77   parent_class = g_type_class_peek_parent (klass);
  78
  79   class->create_accessible = atk_no_op_object_factory_create_accessible;
  80   class->get_accessible_type = atk_no_op_object_factory_get_accessible_type;
  81 }
  82
  83 /**
  84  * atk_no_op_object_factory_new:
  85  *
  86  * Creates an instance of an #AtkObjectFactory which generates primitive
  87  * (non-functioning) #AtkObjects.
  88  *
  89  * Returns: an instance of an #AtkObjectFactory
  90  **/
  91 AtkObjectFactory*
  92 atk_no_op_object_factory_new (void)
  93 {
  94   GObject *factory;
  95
  96   factory = g_object_new (ATK_TYPE_NO_OP_OBJECT_FACTORY, NULL);
  97
  98   g_return_val_if_fail (factory != NULL, NULL);
  99   return ATK_OBJECT_FACTORY (factory);
 100 }
 101
 102 static AtkObject*
 103 atk_no_op_object_factory_create_accessible (GObject   *obj)
 104 {
 105   AtkObject     *accessible;
 106
 107   accessible = atk_no_op_object_new (obj);
 108
 109   return accessible;
 110 }
 111
 112 static GType
 113 atk_no_op_object_factory_get_accessible_type (void)
 114 {
 115   return ATK_TYPE_NO_OP_OBJECT;
 116 }