libspi/relation.c

   1 /*
   2  * AT-SPI - Assistive Technology Service Provider Interface
   3  * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
   4  *
   5  * Copyright 2001, 2002 Sun Microsystems Inc.,
   6  * Copyright 2001, 2002 Ximian, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public
  19  * License along with this library; if not, write to the
  20  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21  * Boston, MA 02111-1307, USA.
  22  */
  23
  24 /* relation.c : implements the Relation interface */
  25
  26 #include <config.h>
  27 #include <stdio.h>
  28 #include <libspi/accessible.h>
  29 #include <libspi/relation.h>
  30
  31
  32 static gboolean
  33 spi_init_relation_type_table (Accessibility_RelationType *types)
  34 {
  35   gint i;
  36
  37   for (i = 0; i < ATK_RELATION_LAST_DEFINED; i++)
  38     types[i] = Accessibility_RELATION_NULL;
  39
  40   types[ATK_RELATION_CONTROLLED_BY] = Accessibility_RELATION_CONTROLLED_BY;
  41   types[ATK_RELATION_CONTROLLER_FOR] = Accessibility_RELATION_CONTROLLER_FOR;
  42   types[ATK_RELATION_LABEL_FOR] = Accessibility_RELATION_LABEL_FOR;
  43   types[ATK_RELATION_LABELLED_BY] = Accessibility_RELATION_LABELLED_BY;
  44   types[ATK_RELATION_MEMBER_OF] = Accessibility_RELATION_MEMBER_OF;
  45   types[ATK_RELATION_NODE_CHILD_OF] = Accessibility_RELATION_NODE_CHILD_OF;
  46   types[ATK_RELATION_FLOWS_TO] = Accessibility_RELATION_FLOWS_TO;
  47   types[ATK_RELATION_FLOWS_FROM] = Accessibility_RELATION_FLOWS_FROM;
  48   types[ATK_RELATION_SUBWINDOW_OF] = Accessibility_RELATION_SUBWINDOW_OF;
  49   types[ATK_RELATION_EMBEDS] = Accessibility_RELATION_EMBEDS;
  50   types[ATK_RELATION_EMBEDDED_BY] = Accessibility_RELATION_EMBEDDED_BY;
  51   types[ATK_RELATION_POPUP_FOR] = Accessibility_RELATION_POPUP_FOR;
  52   return TRUE;
  53 }
  54
  55
  56
  57 static Accessibility_RelationType
  58 spi_relation_type_from_atk_relation_type (AtkRelationType type)
  59 {
  60   static gboolean is_initialized = FALSE;
  61   static Accessibility_RelationType spi_relation_type_table [ATK_RELATION_LAST_DEFINED];
  62   Accessibility_RelationType spi_type;
  63
  64   if (!is_initialized)
  65     is_initialized = spi_init_relation_type_table (spi_relation_type_table);
  66
  67   if (type > ATK_RELATION_NULL && type < ATK_RELATION_LAST_DEFINED)
  68     spi_type = spi_relation_type_table[type];
  69   else
  70     spi_type = Accessibility_RELATION_EXTENDED;
  71   return spi_type;
  72 }
  73
  74
  75
  76 static AtkRelation *
  77 get_relation_from_servant (PortableServer_Servant servant)
  78 {
  79   SpiBase *base = SPI_BASE (bonobo_object_from_servant(servant));
  80
  81   g_return_val_if_fail (base, NULL);
  82   return  ATK_RELATION(base->gobj);
  83 }
  84
  85
  86
  87 static Accessibility_RelationType
  88 impl_getRelationType (PortableServer_Servant servant,
  89                       CORBA_Environment * ev)
  90 {
  91   AtkRelation *relation = get_relation_from_servant (servant);
  92   AtkRelationType type;
  93
  94   g_return_val_if_fail (relation != NULL, 0);
  95   type = atk_relation_get_relation_type (relation);
  96   return spi_relation_type_from_atk_relation_type (type);
  97 }
  98
  99
 100 static CORBA_short
 101 impl_getNTargets (PortableServer_Servant servant,
 102                   CORBA_Environment * ev)
 103 {
 104   AtkRelation *relation = get_relation_from_servant(servant);
 105   g_return_val_if_fail (relation != NULL, 0);
 106
 107   return relation->target ? relation->target->len : 0;
 108 }
 109
 110
 111 static CORBA_Object
 112 impl_getTarget (PortableServer_Servant servant,
 113                 const CORBA_short index,
 114                 CORBA_Environment * ev)
 115 {
 116   AtkObject *atk_object;
 117   AtkRelation *relation = get_relation_from_servant (servant);
 118   g_return_val_if_fail (relation, NULL);
 119
 120   if (!relation->target ||
 121       index < 0 ||
 122       index >= relation->target->len)
 123     return CORBA_OBJECT_NIL;
 124
 125   atk_object = g_ptr_array_index (relation->target, index);
 126   if (!atk_object)
 127     return CORBA_OBJECT_NIL;
 128
 129   return spi_accessible_new_return (atk_object, FALSE, ev);
 130 }
 131
 132
 133 SpiRelation *
 134 spi_relation_new (AtkRelation *obj)
 135 {
 136   SpiRelation *new_relation = g_object_new (SPI_RELATION_TYPE, NULL);
 137   spi_base_construct (SPI_BASE (new_relation), G_OBJECT (obj));
 138   return new_relation;
 139 }
 140
 141
 142 static void
 143 spi_relation_class_init (SpiRelationClass *klass)
 144 {
 145   POA_Accessibility_Relation__epv *epv = &klass->epv;
 146
 147   epv->getRelationType  = impl_getRelationType;
 148   epv->getNTargets      = impl_getNTargets;
 149   epv->getTarget        = impl_getTarget;
 150 }
 151
 152
 153 static void
 154 spi_relation_init (SpiRelation *relation)
 155 {
 156 }
 157
 158
 159 BONOBO_TYPE_FUNC_FULL (SpiRelation,
 160                        Accessibility_Relation,
 161                        SPI_TYPE_BASE,
 162                        spi_relation)