atk-adaptor/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   types[ATK_RELATION_PARENT_WINDOW_OF] = Accessibility_RELATION_PARENT_WINDOW_OF;
  53   types[ATK_RELATION_DESCRIPTION_FOR] = Accessibility_RELATION_DESCRIPTION_FOR;
  54   types[ATK_RELATION_DESCRIBED_BY] = Accessibility_RELATION_DESCRIBED_BY;
  55
  56   return TRUE;
  57 }
  58
  59
  60
  61 static Accessibility_RelationType
  62 spi_relation_type_from_atk_relation_type (AtkRelationType type)
  63 {
  64   static gboolean is_initialized = FALSE;
  65   static Accessibility_RelationType spi_relation_type_table [ATK_RELATION_LAST_DEFINED];
  66   Accessibility_RelationType spi_type;
  67
  68   if (!is_initialized)
  69     is_initialized = spi_init_relation_type_table (spi_relation_type_table);
  70
  71   if (type > ATK_RELATION_NULL && type < ATK_RELATION_LAST_DEFINED)
  72     spi_type = spi_relation_type_table[type];
  73   else
  74     spi_type = Accessibility_RELATION_EXTENDED;
  75   return spi_type;
  76 }
  77
  78
  79
  80 static AtkRelation *
  81 get_relation_from_servant (PortableServer_Servant servant)
  82 {
  83   SpiBase *base = SPI_BASE (bonobo_object_from_servant(servant));
  84
  85   g_return_val_if_fail (base, NULL);
  86   return  ATK_RELATION(base->gobj);
  87 }
  88
  89
  90
  91 static Accessibility_RelationType
  92 impl_getRelationType (PortableServer_Servant servant,
  93                       CORBA_Environment * ev)
  94 {
  95   AtkRelation *relation = get_relation_from_servant (servant);
  96   AtkRelationType type;
  97
  98   g_return_val_if_fail (relation != NULL, 0);
  99   type = atk_relation_get_relation_type (relation);
 100   return spi_relation_type_from_atk_relation_type (type);
 101 }
 102
 103
 104 static CORBA_short
 105 impl_getNTargets (PortableServer_Servant servant,
 106                   CORBA_Environment * ev)
 107 {
 108   AtkRelation *relation = get_relation_from_servant(servant);
 109   g_return_val_if_fail (relation != NULL, 0);
 110
 111   return relation->target ? relation->target->len : 0;
 112 }
 113
 114
 115 static CORBA_Object
 116 impl_getTarget (PortableServer_Servant servant,
 117                 const CORBA_short index,
 118                 CORBA_Environment * ev)
 119 {
 120   AtkObject *atk_object;
 121   AtkRelation *relation = get_relation_from_servant (servant);
 122   g_return_val_if_fail (relation, NULL);
 123
 124   if (!relation->target ||
 125       index < 0 ||
 126       index >= relation->target->len)
 127     return CORBA_OBJECT_NIL;
 128
 129   atk_object = g_ptr_array_index (relation->target, index);
 130   if (!atk_object)
 131     return CORBA_OBJECT_NIL;
 132
 133   return spi_accessible_new_return (atk_object, FALSE, ev);
 134 }
 135
 136
 137 SpiRelation *
 138 spi_relation_new (AtkRelation *obj)
 139 {
 140   SpiRelation *new_relation = g_object_new (SPI_RELATION_TYPE, NULL);
 141   spi_base_construct (SPI_BASE (new_relation), G_OBJECT (obj));
 142   return new_relation;
 143 }
 144
 145
 146 static void
 147 spi_relation_class_init (SpiRelationClass *klass)
 148 {
 149   POA_Accessibility_Relation__epv *epv = &klass->epv;
 150
 151   epv->getRelationType  = impl_getRelationType;
 152   epv->getNTargets      = impl_getNTargets;
 153   epv->getTarget        = impl_getTarget;
 154 }
 155
 156
 157 static void
 158 spi_relation_init (SpiRelation *relation)
 159 {
 160 }
 161
 162
 163 BONOBO_TYPE_FUNC_FULL (SpiRelation,
 164                        Accessibility_Relation,
 165                        SPI_TYPE_BASE,
 166                        spi_relation)