atk-adaptor/relation-adaptor.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
  29 #include <atk/atk.h>
  30 #include <droute/droute.h>
  31
  32 #include "common/spi-types.h"
  33 #include "common/spi-dbus.h"
  34
  35 static gboolean
  36 spi_init_relation_type_table (Accessibility_RelationType *types)
  37 {
  38   gint i;
  39
  40   for (i = 0; i < ATK_RELATION_LAST_DEFINED; i++)
  41     types[i] = Accessibility_RELATION_NULL;
  42
  43   types[ATK_RELATION_CONTROLLED_BY] = Accessibility_RELATION_CONTROLLED_BY;
  44   types[ATK_RELATION_CONTROLLER_FOR] = Accessibility_RELATION_CONTROLLER_FOR;
  45   types[ATK_RELATION_LABEL_FOR] = Accessibility_RELATION_LABEL_FOR;
  46   types[ATK_RELATION_LABELLED_BY] = Accessibility_RELATION_LABELLED_BY;
  47   types[ATK_RELATION_MEMBER_OF] = Accessibility_RELATION_MEMBER_OF;
  48   types[ATK_RELATION_NODE_CHILD_OF] = Accessibility_RELATION_NODE_CHILD_OF;
  49   types[ATK_RELATION_FLOWS_TO] = Accessibility_RELATION_FLOWS_TO;
  50   types[ATK_RELATION_FLOWS_FROM] = Accessibility_RELATION_FLOWS_FROM;
  51   types[ATK_RELATION_SUBWINDOW_OF] = Accessibility_RELATION_SUBWINDOW_OF;
  52   types[ATK_RELATION_EMBEDS] = Accessibility_RELATION_EMBEDS;
  53   types[ATK_RELATION_EMBEDDED_BY] = Accessibility_RELATION_EMBEDDED_BY;
  54   types[ATK_RELATION_POPUP_FOR] = Accessibility_RELATION_POPUP_FOR;
  55   types[ATK_RELATION_PARENT_WINDOW_OF] = Accessibility_RELATION_PARENT_WINDOW_OF;
  56   types[ATK_RELATION_DESCRIPTION_FOR] = Accessibility_RELATION_DESCRIPTION_FOR;
  57   types[ATK_RELATION_DESCRIBED_BY] = Accessibility_RELATION_DESCRIBED_BY;
  58
  59   return TRUE;
  60 }
  61
  62
  63
  64 static Accessibility_RelationType
  65 spi_relation_type_from_atk_relation_type (AtkRelationType type)
  66 {
  67   static gboolean is_initialized = FALSE;
  68   static Accessibility_RelationType spi_relation_type_table [ATK_RELATION_LAST_DEFINED];
  69   Accessibility_RelationType spi_type;
  70
  71   if (!is_initialized)
  72     is_initialized = spi_init_relation_type_table (spi_relation_type_table);
  73
  74   if (type > ATK_RELATION_NULL && type < ATK_RELATION_LAST_DEFINED)
  75     spi_type = spi_relation_type_table[type];
  76   else
  77     spi_type = Accessibility_RELATION_EXTENDED;
  78   return spi_type;
  79 }
  80
  81
  82
  83 static AtkRelation *
  84 get_relation_from_servant (PortableServer_Servant servant)
  85 {
  86   SpiBase *base = SPI_BASE (bonobo_object_from_servant(servant));
  87
  88   g_return_val_if_fail (base, NULL);
  89   return  ATK_RELATION(base->gobj);
  90 }
  91
  92
  93
  94 static Accessibility_RelationType
  95 impl_getRelationType (PortableServer_Servant servant,
  96                       CORBA_Environment * ev)
  97 {
  98   AtkRelation *relation = get_relation_from_servant (servant);
  99   AtkRelationType type;
 100
 101   g_return_val_if_fail (relation != NULL, 0);
 102   type = atk_relation_get_relation_type (relation);
 103   return spi_relation_type_from_atk_relation_type (type);
 104 }
 105
 106
 107 static CORBA_short
 108 impl_getNTargets (PortableServer_Servant servant,
 109                   CORBA_Environment * ev)
 110 {
 111   AtkRelation *relation = get_relation_from_servant(servant);
 112   g_return_val_if_fail (relation != NULL, 0);
 113
 114   return relation->target ? relation->target->len : 0;
 115 }
 116
 117
 118 static CORBA_Object
 119 impl_getTarget (PortableServer_Servant servant,
 120                 const CORBA_short index,
 121                 CORBA_Environment * ev)
 122 {
 123   AtkObject *atk_object;
 124   AtkRelation *relation = get_relation_from_servant (servant);
 125   g_return_val_if_fail (relation, NULL);
 126
 127   if (!relation->target ||
 128       index < 0 ||
 129       index >= relation->target->len)
 130     return CORBA_OBJECT_NIL;
 131
 132   atk_object = g_ptr_array_index (relation->target, index);
 133   if (!atk_object)
 134     return CORBA_OBJECT_NIL;
 135
 136   return spi_accessible_new_return (atk_object, FALSE, ev);
 137 }
 138
 139
 140 SpiRelation *
 141 spi_relation_new (AtkRelation *obj)
 142 {
 143   SpiRelation *new_relation = g_object_new (SPI_RELATION_TYPE, NULL);
 144   spi_base_construct (SPI_BASE (new_relation), G_OBJECT (obj));
 145   return new_relation;
 146 }
 147
 148
 149 static void
 150 spi_relation_class_init (SpiRelationClass *klass)
 151 {
 152   POA_Accessibility_Relation__epv *epv = &klass->epv;
 153
 154   epv->getRelationType  = impl_getRelationType;
 155   epv->getNTargets      = impl_getNTargets;
 156   epv->getTarget        = impl_getTarget;
 157 }
 158
 159
 160 static void
 161 spi_relation_init (SpiRelation *relation)
 162 {
 163 }
 164
 165
 166 BONOBO_TYPE_FUNC_FULL (SpiRelation,
 167                        Accessibility_Relation,
 168                        SPI_TYPE_BASE,
 169                        spi_relation)