1 /* ATK - Accessibility Toolkit
2 * Copyright 2001 Sun Microsystems Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library 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.
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 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library 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.
20 #include "atkregistry.h"
21 #include "atknoopobjectfactory.h"
23 static AtkRegistry *default_registry = NULL;;
25 static void atk_registry_init (AtkRegistry *instance,
26 AtkRegistryClass *klass);
27 static void atk_registry_finalize (GObject *instance);
28 static void atk_registry_class_init (AtkRegistryClass *klass);
30 static AtkRegistry* atk_registry_new ();
31 static GType atk_registry_get_factory_type (AtkRegistry *registry,
35 atk_registry_get_type (void)
37 static GType type = 0;
41 static const GTypeInfo info =
43 sizeof (AtkRegistryClass),
44 (GBaseInitFunc) NULL, /* base_init */
45 (GBaseFinalizeFunc) NULL, /* base_finalize */
46 (GClassInitFunc) atk_registry_class_init, /* class_init */
47 (GClassFinalizeFunc) NULL, /* class_finalize */
48 NULL, /* class_data */
49 sizeof (AtkRegistry), /* instance size */
51 (GInstanceInitFunc) atk_registry_init, /* instance init */
52 NULL /* value table */
55 type = g_type_register_static (G_TYPE_OBJECT, "AtkRegistry", &info, 0);
62 atk_registry_class_init (AtkRegistryClass *klass)
64 GObjectClass *object_class;
66 /* is paranoia appropriate in a class initializer ? */
67 g_return_if_fail (G_IS_OBJECT_CLASS (klass));
69 object_class = G_OBJECT_CLASS (klass);
70 object_class->finalize = atk_registry_finalize;
71 default_registry = atk_registry_new ();
76 * Cannot define a class_finalize function when calling
77 * g_type_register_static()
80 atk_registry_class_finalize (GObjectClass *klass)
82 g_return_if_fail (ATK_IS_REGISTRY_CLASS (klass));
84 g_free (default_registry);
89 atk_registry_init (AtkRegistry *instance, AtkRegistryClass *klass)
91 instance->factory_type_registry = g_hash_table_new (NULL, NULL);
92 instance->factory_singleton_cache = g_hash_table_new (NULL, NULL);
100 object = g_object_new (ATK_TYPE_REGISTRY, NULL);
102 g_return_val_if_fail ((object != NULL), NULL);
103 g_return_val_if_fail (ATK_IS_REGISTRY (object), NULL);
105 return (AtkRegistry *) object;
109 atk_registry_finalize (GObject *instance)
111 AtkRegistry *registry;
113 g_return_if_fail (ATK_IS_REGISTRY (instance));
114 registry = ATK_REGISTRY (instance);
115 g_free (registry->factory_type_registry);
116 g_free (registry->factory_singleton_cache);
121 atk_registry_set_factory_type (AtkRegistry *registry,
127 AtkObjectFactory *old_factory;
129 g_return_if_fail (ATK_IS_REGISTRY (registry));
131 value = g_hash_table_lookup (registry->factory_type_registry,
132 GUINT_TO_POINTER (type));
133 old_type = GPOINTER_TO_UINT (value);
134 if (old_type && old_type != factory_type)
136 g_hash_table_remove (registry->factory_type_registry,
137 GUINT_TO_POINTER (type));
139 * If the old factory was created, notify it that it has
140 * been replaced, then free it.
142 old_factory = g_hash_table_lookup (registry->factory_singleton_cache,
143 GUINT_TO_POINTER (old_type));
146 atk_object_factory_invalidate (old_factory);
147 g_type_free_instance ((GTypeInstance *) old_factory);
150 g_hash_table_insert (registry->factory_type_registry,
151 GUINT_TO_POINTER (type),
152 GUINT_TO_POINTER (factory_type));
156 atk_registry_get_factory_type (AtkRegistry *registry,
163 * look up factory type in first hash;
164 * if there isn't an explicitly registered factory type,
165 * try inheriting one...
169 g_hash_table_lookup (registry->factory_type_registry,
170 GUINT_TO_POINTER (type));
171 type = g_type_parent (type);
172 if (type == G_TYPE_INVALID)
176 } while (value == NULL);
178 factory_type = GPOINTER_TO_UINT (value);
184 atk_registry_get_factory (AtkRegistry *registry,
187 gpointer factory_pointer = NULL;
190 factory_type = atk_registry_get_factory_type (registry, type);
192 if (factory_type == G_TYPE_INVALID)
194 /* Factory type has not been specified for this object type */
195 static AtkObjectFactory* default_factory = NULL;
197 if (!default_factory)
198 default_factory = atk_no_op_object_factory_new ();
200 return default_factory;
203 /* ask second hashtable for instance of factory type */
205 g_hash_table_lookup (registry->factory_singleton_cache,
206 GUINT_TO_POINTER (factory_type));
208 /* if there isn't one already, create one and save it */
209 if (factory_pointer == NULL)
211 factory_pointer = g_type_create_instance (factory_type);
212 g_hash_table_insert (registry->factory_singleton_cache,
213 GUINT_TO_POINTER (factory_type),
217 return ATK_OBJECT_FACTORY (factory_pointer);
222 atk_get_default_registry ()
224 if (!default_registry)
226 default_registry = atk_registry_new();
228 return default_registry;