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