atk/atkobject.c

   1 /* ATK -  Accessibility Toolkit
   2  * Copyright 2001 Sun Microsystems Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser 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.
   8  *
   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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser 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.
  18  */
  19
  20 #include "config.h"
  21
  22 #include <string.h>
  23 #include <locale.h>
  24
  25 #include <glib-object.h>
  26 #include <glib/gi18n-lib.h>
  27
  28 #include "atk.h"
  29 #include "atkmarshal.h"
  30 #include "atkprivate.h"
  31
  32 /**
  33  * SECTION:atkobject
  34  * @Short_description: The base object class for the Accessibility Toolkit API.
  35  * @Title:AtkObject
  36  *
  37  * This class is the primary class for accessibility support via the
  38  * Accessibility ToolKit (ATK).  Objects which are instances of
  39  * #AtkObject (or instances of AtkObject-derived types) are queried
  40  * for properties which relate basic (and generic) properties of a UI
  41  * component such as name and description.  Instances of #AtkObject
  42  * may also be queried as to whether they implement other ATK
  43  * interfaces (e.g. #AtkAction, #AtkComponent, etc.), as appropriate
  44  * to the role which a given UI component plays in a user interface.
  45  *
  46  * All UI components in an application which provide useful
  47  * information or services to the user must provide corresponding
  48  * #AtkObject instances on request (in GTK+, for instance, usually on
  49  * a call to #gtk_widget_get_accessible ()), either via ATK support
  50  * built into the toolkit for the widget class or ancestor class, or
  51  * in the case of custom widgets, if the inherited #AtkObject
  52  * implementation is insufficient, via instances of a new #AtkObject
  53  * subclass.
  54  *
  55  * See also: #AtkObjectFactory, #AtkRegistry.  (GTK+ users see also
  56  * #GtkAccessible).
  57  *
  58  */
  59
  60 typedef AtkImplementorIface AtkImplementorInterface;
  61 G_DEFINE_INTERFACE (AtkImplementor, atk_implementor, G_TYPE_OBJECT)
  62
  63 static GPtrArray *role_names = NULL;
  64
  65 enum
  66 {
  67   PROP_0,  /* gobject convention */
  68
  69   PROP_NAME,
  70   PROP_DESCRIPTION,
  71   PROP_PARENT,      /* ancestry has changed */
  72   PROP_VALUE,
  73   PROP_ROLE,
  74   PROP_LAYER,
  75   PROP_MDI_ZORDER,
  76   PROP_TABLE_CAPTION,
  77   PROP_TABLE_COLUMN_DESCRIPTION,
  78   PROP_TABLE_COLUMN_HEADER,
  79   PROP_TABLE_ROW_DESCRIPTION,
  80   PROP_TABLE_ROW_HEADER,
  81   PROP_TABLE_SUMMARY,
  82   PROP_TABLE_CAPTION_OBJECT,
  83   PROP_HYPERTEXT_NUM_LINKS,
  84   PROP_LAST         /* gobject convention */
  85 };
  86
  87 enum {
  88   CHILDREN_CHANGED,
  89   FOCUS_EVENT,
  90   PROPERTY_CHANGE,
  91   STATE_CHANGE,
  92   VISIBLE_DATA_CHANGED,
  93   ACTIVE_DESCENDANT_CHANGED,
  94
  95   LAST_SIGNAL
  96 };
  97
  98 /* These are listed here for extraction by intltool */
  99 #if 0
 100   N_("invalid")
 101   N_("accelerator label")
 102   N_("alert")
 103   N_("animation")
 104   N_("arrow")
 105   N_("calendar")
 106   N_("canvas")
 107   N_("check box")
 108   N_("check menu item")
 109   N_("color chooser")
 110   N_("column header")
 111   N_("combo box")
 112   N_("dateeditor")
 113   N_("desktop icon")
 114   N_("desktop frame")
 115   N_("dial")
 116   N_("dialog")
 117   N_("directory pane")
 118   N_("drawing area")
 119   N_("file chooser")
 120   N_("filler")
 121   /* I know it looks wrong but that is what Java returns */
 122   N_("fontchooser")
 123   N_("frame")
 124   N_("glass pane")
 125   N_("html container")
 126   N_("icon")
 127   N_("image")
 128   N_("internal frame")
 129   N_("label")
 130   N_("layered pane")
 131   N_("list")
 132   N_("list item")
 133   N_("menu")
 134   N_("menu bar")
 135   N_("menu item")
 136   N_("option pane")
 137   N_("page tab")
 138   N_("page tab list")
 139   N_("panel")
 140   N_("password text")
 141   N_("popup menu")
 142   N_("progress bar")
 143   N_("push button")
 144   N_("radio button")
 145   N_("radio menu item")
 146   N_("root pane")
 147   N_("row header")
 148   N_("scroll bar")
 149   N_("scroll pane")
 150   N_("separator")
 151   N_("slider")
 152   N_("split pane")
 153   N_("spin button")
 154   N_("statusbar")
 155   N_("table")
 156   N_("table cell")
 157   N_("table column header")
 158   N_("table row header")
 159   N_("tear off menu item")
 160   N_("terminal")
 161   N_("text")
 162   N_("toggle button")
 163   N_("tool bar")
 164   N_("tool tip")
 165   N_("tree")
 166   N_("tree table")
 167   N_("unknown")
 168   N_("viewport")
 169   N_("window")
 170   N_("header")
 171   N_("footer")
 172   N_("paragraph")
 173   N_("ruler")
 174   N_("application")
 175   N_("autocomplete")
 176   N_("edit bar")
 177   N_("embedded component")
 178   N_("entry")
 179   N_("chart")
 180   N_("caption")
 181   N_("document frame")
 182   N_("heading")
 183   N_("page")
 184   N_("section")
 185   N_("redundant object")
 186   N_("form")
 187   N_("link")
 188   N_("input method window")
 189   N_("table row")
 190   N_("tree item")
 191   N_("document spreadsheet")
 192   N_("document presentation")
 193   N_("document text")
 194   N_("document web")
 195   N_("document email")
 196   N_("comment")
 197   N_("list box")
 198   N_("grouping")
 199   N_("image map")
 200   N_("notification")
 201   N_("info bar")
 202   N_("level bar")
 203   N_("title bar")
 204   N_("block quote")
 205   N_("audio")
 206   N_("video")
 207   N_("definition")
 208   N_("article")
 209   N_("landmark")
 210   N_("log")
 211   N_("marquee")
 212   N_("math")
 213   N_("rating")
 214   N_("timer")
 215   N_("description list")
 216   N_("description term")
 217   N_("description value")
 218 #endif /* 0 */
 219
 220 static void            atk_object_class_init        (AtkObjectClass  *klass);
 221 static void            atk_object_init              (AtkObject       *accessible,
 222                                                      AtkObjectClass  *klass);
 223 static AtkRelationSet* atk_object_real_ref_relation_set
 224                                                     (AtkObject       *accessible);
 225 static void            atk_object_real_initialize   (AtkObject       *accessible,
 226                                                      gpointer        data);
 227 static void            atk_object_real_set_property (GObject         *object,
 228                                                      guint            prop_id,
 229                                                      const GValue    *value,
 230                                                      GParamSpec      *pspec);
 231 static void            atk_object_real_get_property (GObject         *object,
 232                                                      guint            prop_id,
 233                                                      GValue          *value,
 234                                                      GParamSpec      *pspec);
 235 static void            atk_object_finalize          (GObject         *object);
 236 static const gchar*    atk_object_real_get_name     (AtkObject       *object);
 237 static const gchar*    atk_object_real_get_description
 238                                                    (AtkObject       *object);
 239 static AtkObject*      atk_object_real_get_parent  (AtkObject       *object);
 240 static AtkRole         atk_object_real_get_role    (AtkObject       *object);
 241 static AtkLayer        atk_object_real_get_layer   (AtkObject       *object);
 242 static AtkStateSet*    atk_object_real_ref_state_set
 243                                                    (AtkObject       *object);
 244 static void            atk_object_real_set_name    (AtkObject       *object,
 245                                                     const gchar     *name);
 246 static void            atk_object_real_set_description
 247                                                    (AtkObject       *object,
 248                                                     const gchar     *description);
 249 static void            atk_object_real_set_parent  (AtkObject       *object,
 250                                                     AtkObject       *parent);
 251 static void            atk_object_real_set_role    (AtkObject       *object,
 252                                                     AtkRole         role);
 253 static void            atk_object_notify           (GObject         *obj,
 254                                                     GParamSpec      *pspec);
 255 static const gchar*    atk_object_real_get_object_locale
 256                                                    (AtkObject       *object);
 257
 258 static guint atk_object_signals[LAST_SIGNAL] = { 0, };
 259
 260 static gpointer parent_class = NULL;
 261
 262 static const gchar* const atk_object_name_property_name = "accessible-name";
 263 static const gchar* const atk_object_name_property_description = "accessible-description";
 264 static const gchar* const atk_object_name_property_parent = "accessible-parent";
 265 static const gchar* const atk_object_name_property_value = "accessible-value";
 266 static const gchar* const atk_object_name_property_role = "accessible-role";
 267 static const gchar* const atk_object_name_property_component_layer = "accessible-component-layer";
 268 static const gchar* const atk_object_name_property_component_mdi_zorder = "accessible-component-mdi-zorder";
 269 static const gchar* const atk_object_name_property_table_caption = "accessible-table-caption";
 270 static const gchar* const atk_object_name_property_table_column_description = "accessible-table-column-description";
 271 static const gchar* const atk_object_name_property_table_column_header = "accessible-table-column-header";
 272 static const gchar* const atk_object_name_property_table_row_description = "accessible-table-row-description";
 273 static const gchar* const atk_object_name_property_table_row_header = "accessible-table-row-header";
 274 static const gchar* const atk_object_name_property_table_summary = "accessible-table-summary";
 275 static const gchar* const atk_object_name_property_table_caption_object = "accessible-table-caption-object";
 276 static const gchar* const atk_object_name_property_hypertext_num_links = "accessible-hypertext-nlinks";
 277
 278 static void
 279 initialize_role_names ()
 280 {
 281   GTypeClass *enum_class;
 282   GEnumValue *enum_value;
 283   int i;
 284   gchar *role_name = NULL;
 285
 286   if (role_names)
 287     return;
 288
 289   role_names = g_ptr_array_new ();
 290   enum_class = g_type_class_ref (ATK_TYPE_ROLE);
 291   if (!G_IS_ENUM_CLASS(enum_class))
 292     return;
 293
 294   for (i = 0; i < ATK_ROLE_LAST_DEFINED; i++)
 295     {
 296       enum_value = g_enum_get_value (G_ENUM_CLASS (enum_class), i);
 297       role_name = g_strdup (enum_value->value_nick);
 298       // We want the role names to be in the format "check button" and not "check-button"
 299       _compact_name (role_name);
 300       g_ptr_array_add (role_names, role_name);
 301     }
 302
 303   g_type_class_unref (enum_class);
 304
 305 }
 306
 307 GType
 308 atk_object_get_type (void)
 309 {
 310   static GType type = 0;
 311
 312   if (!type)
 313     {
 314       static const GTypeInfo typeInfo =
 315       {
 316         sizeof (AtkObjectClass),
 317         (GBaseInitFunc) NULL,
 318         (GBaseFinalizeFunc) NULL,
 319         (GClassInitFunc) atk_object_class_init,
 320         (GClassFinalizeFunc) NULL,
 321         NULL,
 322         sizeof (AtkObject),
 323         0,
 324         (GInstanceInitFunc) atk_object_init,
 325       } ;
 326       type = g_type_register_static (G_TYPE_OBJECT, "AtkObject", &typeInfo, 0) ;
 327     }
 328   return type;
 329 }
 330
 331 static void
 332 atk_object_class_init (AtkObjectClass *klass)
 333 {
 334   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 335
 336   parent_class = g_type_class_peek_parent (klass);
 337
 338   gobject_class->set_property = atk_object_real_set_property;
 339   gobject_class->get_property = atk_object_real_get_property;
 340   gobject_class->finalize = atk_object_finalize;
 341   gobject_class->notify = atk_object_notify;
 342
 343   klass->get_name = atk_object_real_get_name;
 344   klass->get_description = atk_object_real_get_description;
 345   klass->get_parent = atk_object_real_get_parent;
 346   klass->get_n_children = NULL;
 347   klass->ref_child = NULL;
 348   klass->get_index_in_parent = NULL;
 349   klass->ref_relation_set = atk_object_real_ref_relation_set;
 350   klass->get_role = atk_object_real_get_role;
 351   klass->get_layer = atk_object_real_get_layer;
 352   klass->get_mdi_zorder = NULL;
 353   klass->initialize = atk_object_real_initialize;
 354   klass->ref_state_set = atk_object_real_ref_state_set;
 355   klass->set_name = atk_object_real_set_name;
 356   klass->set_description = atk_object_real_set_description;
 357   klass->set_parent = atk_object_real_set_parent;
 358   klass->set_role = atk_object_real_set_role;
 359   klass->get_object_locale = atk_object_real_get_object_locale;
 360
 361   /*
 362    * We do not define default signal handlers here
 363    */
 364   klass->children_changed = NULL;
 365   klass->focus_event = NULL;
 366   klass->property_change = NULL;
 367   klass->visible_data_changed = NULL;
 368   klass->active_descendant_changed = NULL;
 369
 370   _gettext_initialization ();
 371
 372   g_object_class_install_property (gobject_class,
 373                                    PROP_NAME,
 374                                    g_param_spec_string (atk_object_name_property_name,
 375                                                         _("Accessible Name"),
 376                                                         _("Object instance’s name formatted for assistive technology access"),
 377                                                         NULL,
 378                                                         G_PARAM_READWRITE));
 379   g_object_class_install_property (gobject_class,
 380                                    PROP_DESCRIPTION,
 381                                    g_param_spec_string (atk_object_name_property_description,
 382                                                         _("Accessible Description"),
 383                                                         _("Description of an object, formatted for assistive technology access"),
 384                                                         NULL,
 385                                                         G_PARAM_READWRITE));
 386   g_object_class_install_property (gobject_class,
 387                                    PROP_PARENT,
 388                                    g_param_spec_object (atk_object_name_property_parent,
 389                                                         _("Accessible Parent"),
 390                                                         _("Parent of the current accessible as returned by atk_object_get_parent()"),
 391                                                         ATK_TYPE_OBJECT,
 392                                                         G_PARAM_READWRITE));
 393
 394   /**
 395    * AtkObject:accessible-value:
 396    *
 397    * Numeric value of this object, in case being and AtkValue.
 398    *
 399    * Deprecated: Since 2.12. Use atk_value_get_value_and_text() to get
 400    * the value, and value-changed signal to be notified on their value
 401    * changes.
 402    */
 403   g_object_class_install_property (gobject_class,
 404                                    PROP_VALUE,
 405                                    g_param_spec_double (atk_object_name_property_value,
 406                                                         _("Accessible Value"),
 407                                                         _("Is used to notify that the value has changed"),
 408                                                         0.0,
 409                                                         G_MAXDOUBLE,
 410                                                         0.0,
 411                                                         G_PARAM_READWRITE));
 412   g_object_class_install_property (gobject_class,
 413                                    PROP_ROLE,
 414                                    g_param_spec_enum   (atk_object_name_property_role,
 415                                                         _("Accessible Role"),
 416                                                         _("The accessible role of this object"),
 417                                                         ATK_TYPE_ROLE,
 418                                                         ATK_ROLE_UNKNOWN,
 419                                                         G_PARAM_READWRITE));
 420   g_object_class_install_property (gobject_class,
 421                                    PROP_LAYER,
 422                                    g_param_spec_int    (atk_object_name_property_component_layer,
 423                                                         _("Accessible Layer"),
 424                                                         _("The accessible layer of this object"),
 425                                                         0,
 426                                                         G_MAXINT,
 427                                                         0,
 428                                                         G_PARAM_READABLE));
 429   g_object_class_install_property (gobject_class,
 430                                    PROP_MDI_ZORDER,
 431                                    g_param_spec_int    (atk_object_name_property_component_mdi_zorder,
 432                                                         _("Accessible MDI Value"),
 433                                                         _("The accessible MDI value of this object"),
 434                                                         G_MININT,
 435                                                         G_MAXINT,
 436                                                         G_MININT,
 437                                                         G_PARAM_READABLE));
 438
 439   /**
 440    * AtkObject:accessible-table-caption:
 441    *
 442    * Table caption.
 443    *
 444    * Deprecated: Since 1.3. Use table-caption-object instead.
 445    */
 446   g_object_class_install_property (gobject_class,
 447                                    PROP_TABLE_CAPTION,
 448                                    g_param_spec_string (atk_object_name_property_table_caption,
 449                                                         _("Accessible Table Caption"),
 450                                                         _("Is used to notify that the table caption has changed; this property should not be used. accessible-table-caption-object should be used instead"),
 451                                                         NULL,
 452                                                         G_PARAM_READWRITE));
 453   /**
 454    * AtkObject:accessible-table-column-header:
 455    *
 456    * Accessible table column header.
 457    *
 458    * Deprecated: Since 2.12. Use atk_table_get_column_header() and
 459    * atk_table_set_column_header() instead.
 460    */
 461   g_object_class_install_property (gobject_class,
 462                                    PROP_TABLE_COLUMN_HEADER,
 463                                    g_param_spec_object (atk_object_name_property_table_column_header,
 464                                                         _("Accessible Table Column Header"),
 465                                                         _("Is used to notify that the table column header has changed"),
 466                                                         ATK_TYPE_OBJECT,
 467                                                         G_PARAM_READWRITE));
 468
 469   /**
 470    * AtkObject:accessible-table-column-description:
 471    *
 472    * Accessible table column description.
 473    *
 474    * Deprecated: Since 2.12. Use atk_table_get_column_description()
 475    * and atk_table_set_column_description() instead.
 476    */
 477   g_object_class_install_property (gobject_class,
 478                                    PROP_TABLE_COLUMN_DESCRIPTION,
 479                                    g_param_spec_string (atk_object_name_property_table_column_description,
 480                                                         _("Accessible Table Column Description"),
 481                                                         _("Is used to notify that the table column description has changed"),
 482                                                         NULL,
 483                                                         G_PARAM_READWRITE));
 484
 485   /**
 486    * AtkObject:accessible-table-row-header:
 487    *
 488    * Accessible table row header.
 489    *
 490    * Deprecated: Since 2.12. Use atk_table_get_row_header() and
 491    * atk_table_set_row_header() instead.
 492    */
 493   g_object_class_install_property (gobject_class,
 494                                    PROP_TABLE_ROW_HEADER,
 495                                    g_param_spec_object (atk_object_name_property_table_row_header,
 496                                                         _("Accessible Table Row Header"),
 497                                                         _("Is used to notify that the table row header has changed"),
 498                                                         ATK_TYPE_OBJECT,
 499                                                         G_PARAM_READWRITE));
 500   /**
 501    * AtkObject:accessible-table-row-description:
 502    *
 503    * Accessible table row description.
 504    *
 505    * Deprecated: Since 2.12. Use atk_table_get_row_description() and
 506    * atk_table_set_row_description() instead.
 507    */
 508   g_object_class_install_property (gobject_class,
 509                                    PROP_TABLE_ROW_DESCRIPTION,
 510                                    g_param_spec_string (atk_object_name_property_table_row_description,
 511                                                         _("Accessible Table Row Description"),
 512                                                         _("Is used to notify that the table row description has changed"),
 513                                                         NULL,
 514                                                         G_PARAM_READWRITE));
 515   g_object_class_install_property (gobject_class,
 516                                    PROP_TABLE_SUMMARY,
 517                                    g_param_spec_object (atk_object_name_property_table_summary,
 518                                                         _("Accessible Table Summary"),
 519                                                         _("Is used to notify that the table summary has changed"),
 520                                                         ATK_TYPE_OBJECT,
 521                                                         G_PARAM_READWRITE));
 522   g_object_class_install_property (gobject_class,
 523                                    PROP_TABLE_CAPTION_OBJECT,
 524                                    g_param_spec_object (atk_object_name_property_table_caption_object,
 525                                                         _("Accessible Table Caption Object"),
 526                                                         _("Is used to notify that the table caption has changed"),
 527                                                         ATK_TYPE_OBJECT,
 528                                                         G_PARAM_READWRITE));
 529   g_object_class_install_property (gobject_class,
 530                                    PROP_HYPERTEXT_NUM_LINKS,
 531                                    g_param_spec_int    (atk_object_name_property_hypertext_num_links,
 532                                                         _("Number of Accessible Hypertext Links"),
 533                                                         _("The number of links which the current AtkHypertext has"),
 534                                                         0,
 535                                                         G_MAXINT,
 536                                                         0,
 537                                                         G_PARAM_READABLE));
 538
 539   /**
 540    * AtkObject::children-changed:
 541    * @atkobject: the object which received the signal.
 542    * @arg1: The index of the added or removed child. The value can be
 543    * -1. This is used if the value is not known by the implementor
 544    * when the child is added/removed or irrelevant.
 545    * @arg2: (type AtkObject): A gpointer to the child AtkObject which was added or
 546    * removed. If the child was removed, it is possible that it is not
 547    * available for the implementor. In that case this pointer can be
 548    * NULL.
 549    *
 550    * The signal "children-changed" is emitted when a child is added or
 551    * removed form an object. It supports two details: "add" and
 552    * "remove"
 553    */
 554   atk_object_signals[CHILDREN_CHANGED] =
 555     g_signal_new ("children_changed",
 556                   G_TYPE_FROM_CLASS (klass),
 557                   G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
 558                   G_STRUCT_OFFSET (AtkObjectClass, children_changed),
 559                   NULL, NULL,
 560                   g_cclosure_marshal_VOID__UINT_POINTER,
 561                   G_TYPE_NONE,
 562                   2, G_TYPE_UINT, G_TYPE_POINTER);
 563
 564   /**
 565    * AtkObject::focus-event:
 566    * @atkobject: the object which received the signal
 567    * @arg1: a boolean value which indicates whether the object gained
 568    * or lost focus.
 569    *
 570    * The signal "focus-event" is emitted when an object gained or lost
 571    * focus.
 572    *
 573    * Deprecated: 2.9.4: Use the #AtkObject::state-change signal instead.
 574    */
 575   atk_object_signals[FOCUS_EVENT] =
 576     g_signal_new ("focus_event",
 577                   G_TYPE_FROM_CLASS (klass),
 578                   G_SIGNAL_RUN_LAST,
 579                   G_STRUCT_OFFSET (AtkObjectClass, focus_event),
 580                   NULL, NULL,
 581                   g_cclosure_marshal_VOID__BOOLEAN,
 582                   G_TYPE_NONE,
 583                   1, G_TYPE_BOOLEAN);
 584   /**
 585    * AtkObject::property-change:
 586    * @atkobject: the object which received the signal.
 587    * @arg1: (type AtkPropertyValues): an #AtkPropertyValues containing the new
 588    * value of the property which changed.
 589    *
 590    * The signal "property-change" is emitted when an object's property
 591    * value changes. @arg1 contains an #AtkPropertyValues with the name
 592    * and the new value of the property whose value has changed. Note
 593    * that, as with GObject notify, getting this signal does not
 594    * guarantee that the value of the property has actually changed; it
 595    * may also be emitted when the setter of the property is called to
 596    * reinstate the previous value.
 597    *
 598    * Toolkit implementor note: ATK implementors should use
 599    * g_object_notify() to emit property-changed
 600    * notifications. #AtkObject::property-changed is needed by the
 601    * implementation of atk_add_global_event_listener() because GObject
 602    * notify doesn't support emission hooks.
 603    */
 604   atk_object_signals[PROPERTY_CHANGE] =
 605     g_signal_new ("property_change",
 606                   G_TYPE_FROM_CLASS (klass),
 607                   G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
 608                   G_STRUCT_OFFSET (AtkObjectClass, property_change),
 609                   (GSignalAccumulator) NULL, NULL,
 610                   g_cclosure_marshal_VOID__POINTER,
 611                   G_TYPE_NONE, 1,
 612                   G_TYPE_POINTER);
 613
 614   /**
 615    * AtkObject::state-change:
 616    * @atkobject: the object which received the signal.
 617    * @arg1: The name of the state which has changed
 618    * @arg2: A boolean which indicates whether the state has been set or unset.
 619    *
 620    * The "state-change" signal is emitted when an object's state
 621    * changes.  The detail value identifies the state type which has
 622    * changed.
 623    */
 624   atk_object_signals[STATE_CHANGE] =
 625     g_signal_new ("state_change",
 626                   G_TYPE_FROM_CLASS (klass),
 627                   G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
 628                   G_STRUCT_OFFSET (AtkObjectClass, state_change),
 629                   (GSignalAccumulator) NULL, NULL,
 630                   atk_marshal_VOID__STRING_BOOLEAN,
 631                   G_TYPE_NONE, 2,
 632                   G_TYPE_STRING,
 633                   G_TYPE_BOOLEAN);
 634
 635   /**
 636    * AtkObject::visible-data-changed:
 637    * @atkobject: the object which received the signal.
 638    *
 639    * The "visible-data-changed" signal is emitted when the visual
 640    * appearance of the object changed.
 641    */
 642   atk_object_signals[VISIBLE_DATA_CHANGED] =
 643     g_signal_new ("visible_data_changed",
 644                   G_TYPE_FROM_CLASS (klass),
 645                   G_SIGNAL_RUN_LAST,
 646                   G_STRUCT_OFFSET (AtkObjectClass, visible_data_changed),
 647                   (GSignalAccumulator) NULL, NULL,
 648                   g_cclosure_marshal_VOID__VOID,
 649                   G_TYPE_NONE, 0);
 650
 651   /**
 652    * AtkObject::active-descendant-changed:
 653    * @atkobject: the object which received the signal.
 654    * @arg1: (type AtkObject): the newly focused object.
 655    *
 656    * The "active-descendant-changed" signal is emitted by an object
 657    * which has the state ATK_STATE_MANAGES_DESCENDANTS when the focus
 658    * object in the object changes. For instance, a table will emit the
 659    * signal when the cell in the table which has focus changes.
 660    */
 661   atk_object_signals[ACTIVE_DESCENDANT_CHANGED] =
 662     g_signal_new ("active_descendant_changed",
 663                   G_TYPE_FROM_CLASS (klass),
 664                   G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
 665                   G_STRUCT_OFFSET (AtkObjectClass, active_descendant_changed),
 666                   NULL, NULL,
 667                   g_cclosure_marshal_VOID__POINTER,
 668                   G_TYPE_NONE,
 669                   1, G_TYPE_POINTER);
 670 }
 671
 672 static void
 673 atk_object_init  (AtkObject        *accessible,
 674                   AtkObjectClass   *klass)
 675 {
 676   accessible->name = NULL;
 677   accessible->description = NULL;
 678   accessible->accessible_parent = NULL;
 679   accessible->relation_set = atk_relation_set_new();
 680   accessible->role = ATK_ROLE_UNKNOWN;
 681 }
 682
 683 static void
 684 atk_implementor_default_init (AtkImplementorInterface *iface)
 685 {
 686 }
 687
 688 /**
 689  * atk_object_get_name:
 690  * @accessible: an #AtkObject
 691  *
 692  * Gets the accessible name of the accessible.
 693  *
 694  * Returns: a character string representing the accessible name of the object.
 695  **/
 696 const gchar*
 697 atk_object_get_name (AtkObject *accessible)
 698 {
 699   AtkObjectClass *klass;
 700
 701   g_return_val_if_fail (ATK_IS_OBJECT (accessible), NULL);
 702
 703   klass = ATK_OBJECT_GET_CLASS (accessible);
 704   if (klass->get_name)
 705     return (klass->get_name) (accessible);
 706   else
 707     return NULL;
 708 }
 709
 710 /**
 711  * atk_object_get_description:
 712  * @accessible: an #AtkObject
 713  *
 714  * Gets the accessible description of the accessible.
 715  *
 716  * Returns: a character string representing the accessible description
 717  * of the accessible.
 718  *
 719  **/
 720 const gchar*
 721 atk_object_get_description (AtkObject *accessible)
 722 {
 723   AtkObjectClass *klass;
 724
 725   g_return_val_if_fail (ATK_IS_OBJECT (accessible), NULL);
 726
 727   klass = ATK_OBJECT_GET_CLASS (accessible);
 728   if (klass->get_description)
 729     return (klass->get_description) (accessible);
 730   else
 731     return NULL;
 732 }
 733
 734 /**
 735  * atk_object_get_parent:
 736  * @accessible: an #AtkObject
 737  *
 738  * Gets the accessible parent of the accessible. By default this is
 739  * the one assigned with atk_object_set_parent(), but it is assumed
 740  * that ATK implementors have ways to get the parent of the object
 741  * without the need of assigning it manually with
 742  * atk_object_set_parent(), and will return it with this method.
 743  *
 744  * If you are only interested on the parent assigned with
 745  * atk_object_set_parent(), use atk_object_peek_parent().
 746  *
 747  * Returns: (transfer none): an #AtkObject representing the accessible
 748  * parent of the accessible
 749  **/
 750 AtkObject*
 751 atk_object_get_parent (AtkObject *accessible)
 752 {
 753   AtkObjectClass *klass;
 754
 755   g_return_val_if_fail (ATK_IS_OBJECT (accessible), NULL);
 756
 757   klass = ATK_OBJECT_GET_CLASS (accessible);
 758   if (klass->get_parent)
 759     return (klass->get_parent) (accessible);
 760   else
 761     return NULL;
 762 }
 763
 764 /**
 765  * atk_object_peek_parent:
 766  * @accessible: an #AtkObject
 767  *
 768  * Gets the accessible parent of the accessible, if it has been
 769  * manually assigned with atk_object_set_parent. Otherwise, this
 770  * function returns %NULL.
 771  *
 772  * This method is intended as an utility for ATK implementors, and not
 773  * to be exposed to accessible tools. See atk_object_get_parent() for
 774  * further reference.
 775  *
 776  * Returns: (transfer none): an #AtkObject representing the accessible
 777  * parent of the accessible if assigned
 778  **/
 779 AtkObject*
 780 atk_object_peek_parent (AtkObject *accessible)
 781 {
 782   return accessible->accessible_parent;
 783 }
 784
 785 /**
 786  * atk_object_get_n_accessible_children:
 787  * @accessible: an #AtkObject
 788  *
 789  * Gets the number of accessible children of the accessible.
 790  *
 791  * Returns: an integer representing the number of accessible children
 792  * of the accessible.
 793  **/
 794 gint
 795 atk_object_get_n_accessible_children (AtkObject *accessible)
 796 {
 797   AtkObjectClass *klass;
 798
 799   g_return_val_if_fail (ATK_IS_OBJECT (accessible), 0);
 800
 801   klass = ATK_OBJECT_GET_CLASS (accessible);
 802   if (klass->get_n_children)
 803     return (klass->get_n_children) (accessible);
 804   else
 805     return 0;
 806 }
 807
 808 /**
 809  * atk_object_ref_accessible_child:
 810  * @accessible: an #AtkObject
 811  * @i: a gint representing the position of the child, starting from 0
 812  *
 813  * Gets a reference to the specified accessible child of the object.
 814  * The accessible children are 0-based so the first accessible child is
 815  * at index 0, the second at index 1 and so on.
 816  *
 817  * Returns: (transfer full): an #AtkObject representing the specified
 818  * accessible child of the accessible.
 819  **/
 820 AtkObject*
 821 atk_object_ref_accessible_child (AtkObject   *accessible,
 822                                  gint        i)
 823 {
 824   AtkObjectClass *klass;
 825
 826   g_return_val_if_fail (ATK_IS_OBJECT (accessible), NULL);
 827
 828   klass = ATK_OBJECT_GET_CLASS (accessible);
 829   if (klass->ref_child)
 830     return (klass->ref_child) (accessible, i);
 831   else
 832     return NULL;
 833 }
 834
 835 /**
 836  * atk_object_ref_relation_set:
 837  * @accessible: an #AtkObject
 838  *
 839  * Gets the #AtkRelationSet associated with the object.
 840  *
 841  * Returns: (transfer full): an #AtkRelationSet representing the relation set
 842  * of the object.
 843  **/
 844 AtkRelationSet*
 845 atk_object_ref_relation_set (AtkObject *accessible)
 846 {
 847   AtkObjectClass *klass;
 848
 849   g_return_val_if_fail (ATK_IS_OBJECT (accessible), NULL);
 850
 851   klass = ATK_OBJECT_GET_CLASS (accessible);
 852   if (klass->ref_relation_set)
 853     return (klass->ref_relation_set) (accessible);
 854   else
 855     return NULL;
 856 }
 857
 858 /**
 859  * atk_role_register:
 860  * @name: a character string describing the new role.
 861  *
 862  * Registers the role specified by @name. @name must be a meaningful
 863  * name. So it should not be empty, or consisting on whitespaces.
 864  *
 865  * Deprecated: Since 2.12. If your application/toolkit doesn't find a
 866  * suitable role for a specific object defined at #AtkRole, please
 867  * submit a bug in order to add a new role to the specification.
 868  *
 869  * Returns: an #AtkRole for the new role if added
 870  * properly. ATK_ROLE_INVALID in case of error.
 871  **/
 872 AtkRole
 873 atk_role_register (const gchar *name)
 874 {
 875   gboolean valid = FALSE;
 876   gint i = 0;
 877   glong length = g_utf8_strlen (name, -1);
 878
 879   for (i=0; i < length; i++) {
 880     if (name[i]!=' ') {
 881       valid = TRUE;
 882       break;
 883     }
 884   }
 885
 886   if (!valid)
 887     return ATK_ROLE_INVALID;
 888
 889   if (!role_names)
 890     initialize_role_names ();
 891
 892   g_ptr_array_add (role_names, g_strdup (name));
 893   return role_names->len - 1;
 894 }
 895
 896 /**
 897  * atk_object_get_role:
 898  * @accessible: an #AtkObject
 899  *
 900  * Gets the role of the accessible.
 901  *
 902  * Returns: an #AtkRole which is the role of the accessible
 903  **/
 904 AtkRole
 905 atk_object_get_role (AtkObject *accessible)
 906 {
 907   AtkObjectClass *klass;
 908
 909   g_return_val_if_fail (ATK_IS_OBJECT (accessible), ATK_ROLE_UNKNOWN);
 910
 911   klass = ATK_OBJECT_GET_CLASS (accessible);
 912   if (klass->get_role)
 913     return (klass->get_role) (accessible);
 914   else
 915     return ATK_ROLE_UNKNOWN;
 916 }
 917
 918 /**
 919  * atk_object_get_layer:
 920  * @accessible: an #AtkObject
 921  *
 922  * Gets the layer of the accessible.
 923  *
 924  * Deprecated: Use atk_component_get_layer instead.
 925  *
 926  * Returns: an #AtkLayer which is the layer of the accessible
 927  **/
 928 AtkLayer
 929 atk_object_get_layer (AtkObject *accessible)
 930 {
 931   AtkObjectClass *klass;
 932
 933   g_return_val_if_fail (ATK_IS_OBJECT (accessible), ATK_LAYER_INVALID);
 934
 935   klass = ATK_OBJECT_GET_CLASS (accessible);
 936   if (klass->get_layer)
 937     return (klass->get_layer) (accessible);
 938   else
 939     return ATK_LAYER_INVALID;
 940 }
 941
 942 /**
 943  * atk_object_get_mdi_zorder:
 944  * @accessible: an #AtkObject
 945  *
 946  * Gets the zorder of the accessible. The value G_MININT will be returned
 947  * if the layer of the accessible is not ATK_LAYER_MDI.
 948  *
 949  * Deprecated: Use atk_component_get_mdi_zorder instead.
 950  *
 951  * Returns: a gint which is the zorder of the accessible, i.e. the depth at
 952  * which the component is shown in relation to other components in the same
 953  * container.
 954  *
 955  **/
 956 gint
 957 atk_object_get_mdi_zorder (AtkObject *accessible)
 958 {
 959   AtkObjectClass *klass;
 960
 961   g_return_val_if_fail (ATK_IS_OBJECT (accessible), G_MININT);
 962
 963   klass = ATK_OBJECT_GET_CLASS (accessible);
 964   if (klass->get_mdi_zorder)
 965     return (klass->get_mdi_zorder) (accessible);
 966   else
 967     return G_MININT;
 968 }
 969
 970 /**
 971  * atk_object_ref_state_set:
 972  * @accessible: an #AtkObject
 973  *
 974  * Gets a reference to the state set of the accessible; the caller must
 975  * unreference it when it is no longer needed.
 976  *
 977  * Returns: (transfer full): a reference to an #AtkStateSet which is the state
 978  * set of the accessible
 979  **/
 980 AtkStateSet*
 981 atk_object_ref_state_set (AtkObject *accessible)
 982 {
 983   AtkObjectClass *klass;
 984
 985   g_return_val_if_fail (ATK_IS_OBJECT (accessible), NULL);
 986
 987   klass = ATK_OBJECT_GET_CLASS (accessible);
 988   if (klass->ref_state_set)
 989     return (klass->ref_state_set) (accessible);
 990   else
 991     return NULL;
 992 }
 993
 994 /**
 995  * atk_object_get_index_in_parent:
 996  * @accessible: an #AtkObject
 997  *
 998  * Gets the 0-based index of this accessible in its parent; returns -1 if the
 999  * accessible does not have an accessible parent.
1000  *
1001  * Returns: an integer which is the index of the accessible in its parent
1002  **/
1003 gint
1004 atk_object_get_index_in_parent (AtkObject *accessible)
1005 {
1006   AtkObjectClass *klass;
1007
1008   g_return_val_if_fail (ATK_OBJECT (accessible), -1);
1009
1010   klass = ATK_OBJECT_GET_CLASS (accessible);
1011   if (klass->get_index_in_parent)
1012     return (klass->get_index_in_parent) (accessible);
1013   else
1014     return -1;
1015 }
1016
1017 /**
1018  * atk_object_set_name:
1019  * @accessible: an #AtkObject
1020  * @name: a character string to be set as the accessible name
1021  *
1022  * Sets the accessible name of the accessible. You can't set the name
1023  * to NULL. This is reserved for the initial value. In this aspect
1024  * NULL is similar to ATK_ROLE_UNKNOWN. If you want to set the name to
1025  * a empty value you can use "".
1026  **/
1027 void
1028 atk_object_set_name (AtkObject    *accessible,
1029                      const gchar  *name)
1030 {
1031   AtkObjectClass *klass;
1032   gboolean notify = FALSE;
1033
1034   g_return_if_fail (ATK_IS_OBJECT (accessible));
1035   g_return_if_fail (name != NULL);
1036
1037   klass = ATK_OBJECT_GET_CLASS (accessible);
1038   if (klass->set_name)
1039     {
1040       /* Do not notify for initial name setting. See bug 665870 */
1041       notify = (accessible->name != NULL);
1042
1043       (klass->set_name) (accessible, name);
1044       if (notify)
1045         g_object_notify (G_OBJECT (accessible), atk_object_name_property_name);
1046     }
1047 }
1048
1049 /**
1050  * atk_object_set_description:
1051  * @accessible: an #AtkObject
1052  * @description: a character string to be set as the accessible description
1053  *
1054  * Sets the accessible description of the accessible. You can't set
1055  * the description to NULL. This is reserved for the initial value. In
1056  * this aspect NULL is similar to ATK_ROLE_UNKNOWN. If you want to set
1057  * the name to a empty value you can use "".
1058  **/
1059 void
1060 atk_object_set_description (AtkObject   *accessible,
1061                             const gchar *description)
1062 {
1063   AtkObjectClass *klass;
1064   gboolean notify = FALSE;
1065
1066   g_return_if_fail (ATK_IS_OBJECT (accessible));
1067   g_return_if_fail (description != NULL);
1068
1069   klass = ATK_OBJECT_GET_CLASS (accessible);
1070   if (klass->set_description)
1071     {
1072       /* Do not notify for initial name setting. See bug 665870 */
1073       notify = (accessible->description != NULL);
1074
1075       (klass->set_description) (accessible, description);
1076       if (notify)
1077         g_object_notify (G_OBJECT (accessible),
1078                          atk_object_name_property_description);
1079     }
1080 }
1081
1082 /**
1083  * atk_object_set_parent:
1084  * @accessible: an #AtkObject
1085  * @parent: an #AtkObject to be set as the accessible parent
1086  *
1087  * Sets the accessible parent of the accessible. @parent can be NULL.
1088  **/
1089 void
1090 atk_object_set_parent (AtkObject *accessible,
1091                        AtkObject *parent)
1092 {
1093   AtkObjectClass *klass;
1094
1095   g_return_if_fail (ATK_IS_OBJECT (accessible));
1096
1097   klass = ATK_OBJECT_GET_CLASS (accessible);
1098   if (klass->set_parent)
1099     {
1100       (klass->set_parent) (accessible, parent);
1101       g_object_notify (G_OBJECT (accessible), atk_object_name_property_parent);
1102     }
1103 }
1104
1105 /**
1106  * atk_object_set_role:
1107  * @accessible: an #AtkObject
1108  * @role: an #AtkRole to be set as the role
1109  *
1110  * Sets the role of the accessible.
1111  **/
1112 void
1113 atk_object_set_role (AtkObject *accessible,
1114                      AtkRole   role)
1115 {
1116   AtkObjectClass *klass;
1117   AtkRole old_role;
1118
1119   g_return_if_fail (ATK_IS_OBJECT (accessible));
1120
1121   klass = ATK_OBJECT_GET_CLASS (accessible);
1122   if (klass->set_role)
1123     {
1124       old_role = atk_object_get_role (accessible);
1125       if (old_role != role)
1126         {
1127           (klass->set_role) (accessible, role);
1128           if (old_role != ATK_ROLE_UNKNOWN)
1129           /* Do not notify for initial role setting */
1130             g_object_notify (G_OBJECT (accessible), atk_object_name_property_role);
1131         }
1132     }
1133 }
1134
1135 /**
1136  * atk_object_connect_property_change_handler: (skip)
1137  * @accessible: an #AtkObject
1138  * @handler: a function to be called when a property changes its value
1139  *
1140  * Deprecated: Since 2.12. Connect directly to property-change or
1141  * notify signals.
1142  *
1143  * Returns: a #guint which is the handler id used in
1144  * atk_object_remove_property_change_handler()
1145  **/
1146 guint
1147 atk_object_connect_property_change_handler (AtkObject *accessible,
1148                                             AtkPropertyChangeHandler *handler)
1149 {
1150   AtkObjectClass *klass;
1151
1152   g_return_val_if_fail (ATK_IS_OBJECT (accessible), 0);
1153   g_return_val_if_fail ((handler != NULL), 0);
1154
1155   klass = ATK_OBJECT_GET_CLASS (accessible);
1156   if (klass->connect_property_change_handler)
1157     return (klass->connect_property_change_handler) (accessible, handler);
1158   else
1159     return 0;
1160 }
1161
1162 /**
1163  * atk_object_remove_property_change_handler:
1164  * @accessible: an #AtkObject
1165  * @handler_id: a guint which identifies the handler to be removed.
1166  *
1167  * Deprecated: Since 2.12.
1168  *
1169  * Removes a property change handler.
1170  **/
1171 void
1172 atk_object_remove_property_change_handler  (AtkObject *accessible,
1173                                             guint      handler_id)
1174 {
1175   AtkObjectClass *klass;
1176
1177   g_return_if_fail (ATK_IS_OBJECT (accessible));
1178
1179   klass = ATK_OBJECT_GET_CLASS (accessible);
1180   if (klass->remove_property_change_handler)
1181     (klass->remove_property_change_handler) (accessible, handler_id);
1182 }
1183
1184 /**
1185  * atk_object_notify_state_change:
1186  * @accessible: an #AtkObject
1187  * @state: an #AtkState whose state is changed
1188  * @value: a gboolean which indicates whether the state is being set on or off
1189  *
1190  * Emits a state-change signal for the specified state.
1191  *
1192  * Note that as a general rule when the state of an existing object changes,
1193  * emitting a notification is expected.
1194  **/
1195 void
1196 atk_object_notify_state_change (AtkObject *accessible,
1197                                 AtkState  state,
1198                                 gboolean  value)
1199 {
1200   const gchar* name;
1201
1202   g_return_if_fail (ATK_IS_OBJECT (accessible));
1203
1204   name = atk_state_type_get_name (state);
1205   g_signal_emit (accessible, atk_object_signals[STATE_CHANGE],
1206                  g_quark_from_string (name),
1207                  name, value, NULL);
1208 }
1209
1210 /**
1211  * atk_implementor_ref_accessible:
1212  * @implementor: The #GObject instance which should implement #AtkImplementorIface
1213  * if a non-null return value is required.
1214  *
1215  * Gets a reference to an object's #AtkObject implementation, if
1216  * the object implements #AtkObjectIface
1217  *
1218  * Returns: (transfer full): a reference to an object's #AtkObject
1219  * implementation
1220  */
1221 AtkObject *
1222 atk_implementor_ref_accessible (AtkImplementor *implementor)
1223 {
1224   AtkImplementorIface *iface;
1225   AtkObject           *accessible = NULL;
1226
1227   g_return_val_if_fail (ATK_IS_IMPLEMENTOR (implementor), NULL);
1228
1229   iface = ATK_IMPLEMENTOR_GET_IFACE (implementor);
1230
1231   if (iface != NULL)
1232     accessible =  iface->ref_accessible (implementor);
1233
1234   g_return_val_if_fail ((accessible != NULL), NULL);
1235
1236   return accessible;
1237 }
1238
1239
1240 /**
1241  * atk_object_get_attributes:
1242  * @accessible: An #AtkObject.
1243  *
1244  * Get a list of properties applied to this object as a whole, as an #AtkAttributeSet consisting of
1245  * name-value pairs. As such these attributes may be considered weakly-typed properties or annotations,
1246  * as distinct from strongly-typed object data available via other get/set methods.
1247  * Not all objects have explicit "name-value pair" #AtkAttributeSet properties.
1248  *
1249  * Since: 1.12
1250  *
1251  * Returns: (transfer full): an #AtkAttributeSet consisting of all
1252  * explicit properties/annotations applied to the object, or an empty
1253  * set if the object has no name-value pair attributes assigned to
1254  * it. This #atkattributeset should be freed by a call to
1255  * atk_attribute_set_free().
1256  */
1257 AtkAttributeSet *
1258 atk_object_get_attributes (AtkObject                  *accessible)
1259 {
1260   AtkObjectClass *klass;
1261
1262   g_return_val_if_fail (ATK_IS_OBJECT (accessible), NULL);
1263
1264   klass = ATK_OBJECT_GET_CLASS (accessible);
1265   if (klass->get_attributes)
1266     return (klass->get_attributes) (accessible);
1267   else
1268     return NULL;
1269
1270 }
1271
1272 static AtkRelationSet*
1273 atk_object_real_ref_relation_set (AtkObject *accessible)
1274 {
1275   g_return_val_if_fail (accessible->relation_set, NULL);
1276   g_object_ref (accessible->relation_set);
1277
1278   return accessible->relation_set;
1279 }
1280
1281 static void
1282 atk_object_real_set_property (GObject      *object,
1283                               guint         prop_id,
1284                               const GValue *value,
1285                               GParamSpec   *pspec)
1286 {
1287   AtkObject *accessible;
1288
1289   accessible = ATK_OBJECT (object);
1290
1291   switch (prop_id)
1292     {
1293     case PROP_NAME:
1294       atk_object_set_name (accessible, g_value_get_string (value));
1295       break;
1296     case PROP_DESCRIPTION:
1297       atk_object_set_description (accessible, g_value_get_string (value));
1298       break;
1299     case PROP_ROLE:
1300       atk_object_set_role (accessible, g_value_get_enum (value));
1301       break;
1302     case PROP_PARENT:
1303       atk_object_set_parent (accessible, g_value_get_object (value));
1304       break;
1305     case PROP_VALUE:
1306       if (ATK_IS_VALUE (accessible))
1307         atk_value_set_current_value (ATK_VALUE (accessible), value);
1308       break;
1309     case PROP_TABLE_SUMMARY:
1310       if (ATK_IS_TABLE (accessible))
1311         atk_table_set_summary (ATK_TABLE (accessible), g_value_get_object (value));
1312       break;
1313     case PROP_TABLE_CAPTION_OBJECT:
1314       if (ATK_IS_TABLE (accessible))
1315         atk_table_set_caption (ATK_TABLE (accessible), g_value_get_object (value));
1316       break;
1317     default:
1318       break;
1319     }
1320 }
1321
1322 static void
1323 atk_object_real_get_property (GObject      *object,
1324                               guint         prop_id,
1325                               GValue       *value,
1326                               GParamSpec   *pspec)
1327 {
1328   AtkObject *accessible;
1329
1330   accessible = ATK_OBJECT (object);
1331
1332   switch (prop_id)
1333     {
1334     case PROP_NAME:
1335       g_value_set_string (value, atk_object_get_name (accessible));
1336       break;
1337     case PROP_DESCRIPTION:
1338       g_value_set_string (value, atk_object_get_description (accessible));
1339       break;
1340     case PROP_ROLE:
1341       g_value_set_enum (value, atk_object_get_role (accessible));
1342       break;
1343     case PROP_LAYER:
1344       if (ATK_IS_COMPONENT (accessible))
1345         g_value_set_int (value, atk_component_get_layer (ATK_COMPONENT (accessible)));
1346       break;
1347     case PROP_MDI_ZORDER:
1348       if (ATK_IS_COMPONENT (accessible))
1349         g_value_set_int (value, atk_component_get_mdi_zorder (ATK_COMPONENT (accessible)));
1350       break;
1351     case PROP_PARENT:
1352       g_value_set_object (value, atk_object_get_parent (accessible));
1353       break;
1354     case PROP_VALUE:
1355       if (ATK_IS_VALUE (accessible))
1356         atk_value_get_current_value (ATK_VALUE (accessible), value);
1357       break;
1358     case PROP_TABLE_SUMMARY:
1359       if (ATK_IS_TABLE (accessible))
1360         g_value_set_object (value, atk_table_get_summary (ATK_TABLE (accessible)));
1361       break;
1362     case PROP_TABLE_CAPTION_OBJECT:
1363       if (ATK_IS_TABLE (accessible))
1364         g_value_set_object (value, atk_table_get_caption (ATK_TABLE (accessible)));
1365       break;
1366     case PROP_HYPERTEXT_NUM_LINKS:
1367       if (ATK_IS_HYPERTEXT (accessible))
1368         g_value_set_int (value, atk_hypertext_get_n_links (ATK_HYPERTEXT (accessible)));
1369       break;
1370     default:
1371       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1372       break;
1373     }
1374 }
1375
1376 static void
1377 atk_object_finalize (GObject *object)
1378 {
1379   AtkObject        *accessible;
1380
1381   g_return_if_fail (ATK_IS_OBJECT (object));
1382
1383   accessible = ATK_OBJECT (object);
1384
1385   g_free (accessible->name);
1386   g_free (accessible->description);
1387
1388   /*
1389    * Free memory allocated for relation set if it have been allocated.
1390    */
1391   if (accessible->relation_set)
1392     g_object_unref (accessible->relation_set);
1393
1394   if (accessible->accessible_parent)
1395     g_object_unref (accessible->accessible_parent);
1396
1397   G_OBJECT_CLASS (parent_class)->finalize (object);
1398 }
1399
1400 static const gchar*
1401 atk_object_real_get_name (AtkObject *object)
1402 {
1403   return object->name;
1404 }
1405
1406 static const gchar*
1407 atk_object_real_get_description (AtkObject *object)
1408 {
1409   return object->description;
1410 }
1411
1412 static AtkObject*
1413 atk_object_real_get_parent (AtkObject       *object)
1414 {
1415   return atk_object_peek_parent (object);
1416 }
1417
1418 static AtkRole
1419 atk_object_real_get_role (AtkObject       *object)
1420 {
1421   return object->role;
1422 }
1423
1424 static AtkLayer
1425 atk_object_real_get_layer (AtkObject       *object)
1426 {
1427   return object->layer;
1428 }
1429
1430 static AtkStateSet*
1431 atk_object_real_ref_state_set (AtkObject *accessible)
1432 {
1433   AtkStateSet *state_set;
1434   AtkObject *focus_object;
1435
1436   state_set = atk_state_set_new ();
1437
1438   focus_object = atk_get_focus_object ();
1439   if (focus_object == accessible)
1440     atk_state_set_add_state (state_set, ATK_STATE_FOCUSED);
1441
1442   return state_set;
1443 }
1444
1445 static void
1446 atk_object_real_set_name (AtkObject       *object,
1447                           const gchar     *name)
1448 {
1449   g_free (object->name);
1450   object->name = g_strdup (name);
1451 }
1452
1453 static void
1454 atk_object_real_set_description (AtkObject       *object,
1455                                  const gchar     *description)
1456 {
1457   g_free (object->description);
1458   object->description = g_strdup (description);
1459 }
1460
1461 static void
1462 atk_object_real_set_parent (AtkObject       *object,
1463                             AtkObject       *parent)
1464 {
1465   if (object->accessible_parent)
1466     g_object_unref (object->accessible_parent);
1467
1468   object->accessible_parent = parent;
1469   if (object->accessible_parent)
1470     g_object_ref (object->accessible_parent);
1471 }
1472
1473 static void
1474 atk_object_real_set_role (AtkObject *object,
1475                           AtkRole   role)
1476 {
1477   object->role = role;
1478 }
1479
1480 /**
1481  * atk_object_initialize:
1482  * @accessible: a #AtkObject
1483  * @data: a #gpointer which identifies the object for which the AtkObject was created.
1484  *
1485  * This function is called when implementing subclasses of #AtkObject.
1486  * It does initialization required for the new object. It is intended
1487  * that this function should called only in the ..._new() functions used
1488  * to create an instance of a subclass of #AtkObject
1489  **/
1490 void
1491 atk_object_initialize (AtkObject  *accessible,
1492                        gpointer   data)
1493 {
1494   AtkObjectClass *klass;
1495
1496   g_return_if_fail (ATK_IS_OBJECT (accessible));
1497
1498   klass = ATK_OBJECT_GET_CLASS (accessible);
1499   if (klass->initialize)
1500     klass->initialize (accessible, data);
1501 }
1502
1503 /*
1504  * This function is a signal handler for notify signal which gets emitted
1505  * when a property changes value.
1506  *
1507  * It constructs an AtkPropertyValues structure and emits a "property_changed"
1508  * signal which causes the user specified AtkPropertyChangeHandler
1509  * to be called.
1510  */
1511 static void
1512 atk_object_notify (GObject     *obj,
1513                    GParamSpec  *pspec)
1514 {
1515   AtkPropertyValues values = { NULL, };
1516
1517   g_value_init (&values.new_value, pspec->value_type);
1518   g_object_get_property (obj, pspec->name, &values.new_value);
1519   values.property_name = pspec->name;
1520   g_signal_emit (obj, atk_object_signals[PROPERTY_CHANGE],
1521                  g_quark_from_string (pspec->name),
1522                  &values, NULL);
1523   g_value_unset (&values.new_value);
1524 }
1525
1526 /**
1527  * atk_role_get_name:
1528  * @role: The #AtkRole whose name is required
1529  *
1530  * Gets the description string describing the #AtkRole @role.
1531  *
1532  * Returns: the string describing the AtkRole
1533  */
1534 const gchar*
1535 atk_role_get_name (AtkRole role)
1536 {
1537   g_return_val_if_fail (role >= 0, NULL);
1538
1539   if (!role_names)
1540     initialize_role_names ();
1541
1542   if (role < role_names->len)
1543     return g_ptr_array_index (role_names, role);
1544
1545   return NULL;
1546 }
1547
1548 /**
1549  * atk_role_get_localized_name:
1550  * @role: The #AtkRole whose localized name is required
1551  *
1552  * Gets the localized description string describing the #AtkRole @role.
1553  *
1554  * Returns: the localized string describing the AtkRole
1555  **/
1556 const gchar*
1557 atk_role_get_localized_name (AtkRole role)
1558 {
1559   _gettext_initialization ();
1560
1561   return dgettext (GETTEXT_PACKAGE, atk_role_get_name (role));
1562 }
1563
1564 static const gchar*
1565 atk_object_real_get_object_locale (AtkObject *object)
1566 {
1567   return setlocale (LC_MESSAGES, NULL);
1568 }
1569
1570 /**
1571  * atk_object_get_object_locale:
1572  * @accessible: an #AtkObject
1573  *
1574  * Gets a UTF-8 string indicating the POSIX-style LC_MESSAGES locale
1575  * of @accessible.
1576  *
1577  * Since: 2.8
1578  *
1579  * Returns: a UTF-8 string indicating the POSIX-style LC_MESSAGES
1580  *          locale of @accessible.
1581  **/
1582 const gchar*
1583 atk_object_get_object_locale (AtkObject *accessible)
1584 {
1585   AtkObjectClass *klass;
1586
1587   g_return_val_if_fail (ATK_IS_OBJECT (accessible), NULL);
1588
1589   klass = ATK_OBJECT_GET_CLASS (accessible);
1590   if (klass->get_object_locale)
1591     return (klass->get_object_locale) (accessible);
1592   else
1593     return NULL;
1594 }
1595
1596
1597 /**
1598  * atk_role_for_name:
1599  * @name: a string which is the (non-localized) name of an ATK role.
1600  *
1601  * Get the #AtkRole type corresponding to a rolew name.
1602  *
1603  * Returns: the #AtkRole enumerated type corresponding to the specified name,
1604  *          or #ATK_ROLE_INVALID if no matching role is found.
1605  **/
1606 AtkRole
1607 atk_role_for_name (const gchar *name)
1608 {
1609   AtkRole role = ATK_ROLE_INVALID;
1610   gint i;
1611
1612   g_return_val_if_fail (name, ATK_ROLE_INVALID);
1613
1614   if (!role_names)
1615     initialize_role_names ();
1616
1617   for (i = 0; i < role_names->len; i++)
1618     {
1619       gchar *role_name = (gchar *)g_ptr_array_index (role_names, i);
1620
1621       g_return_val_if_fail (role_name, ATK_ROLE_INVALID);
1622
1623       if (strcmp (name, role_name) == 0)
1624         {
1625           role = i;
1626           break;
1627         }
1628     }
1629
1630   return role;
1631 }
1632
1633 /**
1634  * atk_object_add_relationship:
1635  * @object: The #AtkObject to which an AtkRelation is to be added.
1636  * @relationship: The #AtkRelationType of the relation
1637  * @target: The #AtkObject which is to be the target of the relation.
1638  *
1639  * Adds a relationship of the specified type with the specified target.
1640  *
1641  * Returns: TRUE if the relationship is added.
1642  **/
1643 gboolean
1644 atk_object_add_relationship (AtkObject       *object,
1645                              AtkRelationType relationship,
1646                              AtkObject       *target)
1647 {
1648   AtkObject *array[1];
1649   AtkRelation *relation;
1650
1651   g_return_val_if_fail (ATK_IS_OBJECT (object), FALSE);
1652   g_return_val_if_fail (ATK_IS_OBJECT (target), FALSE);
1653
1654   if (atk_relation_set_contains_target (object->relation_set,
1655                                         relationship, target))
1656     return FALSE;
1657
1658   array[0] = target;
1659   relation = atk_relation_new (array, 1, relationship);
1660   atk_relation_set_add (object->relation_set, relation);
1661   g_object_unref (relation);
1662
1663   return TRUE;
1664 }
1665
1666 /**
1667  * atk_object_remove_relationship:
1668  * @object: The #AtkObject from which an AtkRelation is to be removed.
1669  * @relationship: The #AtkRelationType of the relation
1670  * @target: The #AtkObject which is the target of the relation to be removed.
1671  *
1672  * Removes a relationship of the specified type with the specified target.
1673  *
1674  * Returns: TRUE if the relationship is removed.
1675  **/
1676 gboolean
1677 atk_object_remove_relationship (AtkObject       *object,
1678                                 AtkRelationType relationship,
1679                                 AtkObject       *target)
1680 {
1681   gboolean ret = FALSE;
1682   AtkRelation *relation;
1683   GPtrArray *array;
1684
1685   g_return_val_if_fail (ATK_IS_OBJECT (object), FALSE);
1686   g_return_val_if_fail (ATK_IS_OBJECT (target), FALSE);
1687
1688   relation = atk_relation_set_get_relation_by_type (object->relation_set, relationship);
1689
1690   if (relation)
1691     {
1692       ret = atk_relation_remove_target (relation, target);
1693       array = atk_relation_get_target (relation);
1694       if (!array || array->len == 0)
1695         atk_relation_set_remove (object->relation_set, relation);
1696     }
1697   return ret;
1698 }
1699
1700 static void
1701 atk_object_real_initialize (AtkObject *accessible,
1702                             gpointer  data)
1703 {
1704   return;
1705 }