libspi/application.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 /* application.c: implements SpiApplication.idl */
  25
  26 #include <string.h>
  27 #include <config.h>
  28 #include <glib.h>
  29 #include <atk/atkutil.h>
  30 #include <libspi/application.h>
  31 #include <locale.h>
  32 #include "spi-private.h"
  33
  34 /* Our parent Gtk object type */
  35 #define PARENT_TYPE SPI_ACCESSIBLE_TYPE
  36
  37 /* A pointer to our parent object class */
  38 static SpiAccessibleClass *spi_application_parent_class;
  39
  40 static SpiApplication *the_app;
  41
  42 /* static methods */
  43
  44 static void notify_listeners (GList *listeners,
  45                               SpiAccessible *source,
  46                               Accessibility_Event *e);
  47
  48 /*
  49  * Implemented GObject::finalize
  50  */
  51 static void
  52 spi_accessible_application_finalize (GObject *object)
  53 {
  54   GList *l;
  55   SpiApplication *application = (SpiApplication *) object;
  56   CORBA_Environment ev;
  57
  58   CORBA_exception_init (&ev);
  59
  60   for (l = application->toolkit_listeners; l; l = l->next)
  61     {
  62       CORBA_Object_release ((CORBA_Object) l->data, &ev);
  63     }
  64
  65   CORBA_exception_free (&ev);
  66
  67   g_list_free (application->toolkit_listeners);
  68   application->toolkit_listeners = NULL;
  69
  70   (G_OBJECT_CLASS (spi_application_parent_class))->finalize (object);
  71 }
  72
  73 static CORBA_string
  74 impl_accessibility_application_get_toolkit_name (PortableServer_Servant servant,
  75                                                  CORBA_Environment     *ev)
  76 {
  77   return CORBA_string_dup (atk_get_toolkit_name ());
  78 }
  79
  80 static CORBA_string
  81 impl_accessibility_application_get_version (PortableServer_Servant servant,
  82                                             CORBA_Environment     *ev)
  83 {
  84   return CORBA_string_dup (atk_get_toolkit_version ());
  85 }
  86
  87 static CORBA_long
  88 impl_accessibility_application_get_id (PortableServer_Servant servant,
  89                                        CORBA_Environment     *ev)
  90 {
  91   SpiApplication *application = SPI_APPLICATION (
  92     bonobo_object_from_servant (servant));
  93
  94   return application->id;
  95 }
  96
  97 static void
  98 impl_accessibility_application_set_id (PortableServer_Servant servant,
  99                                        const CORBA_long id,
 100                                        CORBA_Environment *ev)
 101 {
 102   SpiApplication *application = SPI_APPLICATION (
 103     bonobo_object_from_servant (servant));
 104
 105   application->id = id;
 106 }
 107
 108 static AtkObject *
 109 get_atk_object_ref (GObject *gobject)
 110 {
 111   AtkObject *aobject;
 112
 113   if (ATK_IS_IMPLEMENTOR (gobject))
 114     {
 115       aobject = atk_implementor_ref_accessible (ATK_IMPLEMENTOR (gobject));
 116     }
 117   else if (ATK_IS_OBJECT (gobject))
 118     {
 119       aobject = ATK_OBJECT (gobject);
 120       g_object_ref (G_OBJECT (aobject));
 121     }
 122   else
 123     {
 124       aobject = NULL;
 125       g_error ("received event from non-AtkImplementor");
 126     }
 127
 128   return aobject;
 129 }
 130
 131 static gboolean
 132 spi_application_toolkit_event_listener (GSignalInvocationHint *signal_hint,
 133                                         guint                  n_param_values,
 134                                         const GValue          *param_values,
 135                                         gpointer               data)
 136 {
 137   Accessibility_Event e;
 138   AtkObject      *aobject;
 139   SpiAccessible *source;
 140   GSignalQuery   signal_query;
 141   char          *event_name;
 142
 143   g_return_val_if_fail (the_app != NULL, FALSE);
 144
 145   g_signal_query (signal_hint->signal_id, &signal_query);
 146
 147   /* TODO: move GTK reference out of app.c into bridge */
 148   event_name = g_strdup_printf ("Gtk:%s:%s",
 149                                 g_type_name (signal_query.itype),
 150                                 signal_query.signal_name);
 151
 152 #ifdef SPI_DEBUG
 153   fprintf (stderr, "Received signal %s\n", event_name);
 154 #endif
 155
 156   aobject = get_atk_object_ref (g_value_get_object (param_values + 0));
 157
 158   source = spi_accessible_new (aobject);
 159   e.type = CORBA_string_dup (event_name);
 160   e.source = CORBA_OBJECT_NIL;
 161   e.detail1 = 0;
 162   e.detail2 = 0;
 163   spi_init_any_nil (&e.any_data,
 164                     spi_accessible_new_return (atk_get_root (), FALSE, NULL),
 165                     Accessibility_ROLE_UNKNOWN,
 166                     "");
 167   notify_listeners (the_app->toolkit_listeners, source, &e);
 168
 169   bonobo_object_unref (BONOBO_OBJECT (source));
 170   g_object_unref (G_OBJECT (aobject));
 171
 172   g_free (event_name);
 173
 174   return TRUE;
 175 }
 176
 177 static CORBA_string
 178 impl_accessibility_application_get_locale (PortableServer_Servant servant,
 179                                            Accessibility_LOCALE_TYPE lctype,
 180                                            CORBA_Environment *ev)
 181 {
 182     int category;
 183     switch (lctype)
 184     {
 185         case Accessibility_LOCALE_TYPE_COLLATE:
 186             category = LC_COLLATE;
 187             break;
 188         case Accessibility_LOCALE_TYPE_CTYPE:
 189             category = LC_CTYPE;
 190             break;
 191         case Accessibility_LOCALE_TYPE_MONETARY:
 192             category = LC_MONETARY;
 193             break;
 194         case Accessibility_LOCALE_TYPE_NUMERIC:
 195             category = LC_NUMERIC;
 196             break;
 197         case Accessibility_LOCALE_TYPE_MESSAGES:
 198         default:
 199             category = LC_MESSAGES;
 200             break;
 201     }
 202     return CORBA_string_dup (setlocale (category, NULL));
 203 }
 204
 205 static void
 206 impl_accessibility_application_register_toolkit_event_listener (PortableServer_Servant servant,
 207                                                                 Accessibility_EventListener listener,
 208                                                                 const CORBA_char *event_name,
 209                                                                 CORBA_Environment *ev)
 210 {
 211   guint spi_listener_id;
 212   spi_listener_id =
 213      atk_add_global_event_listener (spi_application_toolkit_event_listener, event_name);
 214   the_app->toolkit_listeners = g_list_append (the_app->toolkit_listeners,
 215                                               CORBA_Object_duplicate (listener, ev));
 216 #ifdef SPI_DEBUG
 217   fprintf (stderr, "registered %d for toolkit events named: %s\n",
 218            spi_listener_id,
 219            event_name);
 220 #endif
 221 }
 222
 223 static void
 224 notify_listeners (GList *listeners, SpiAccessible *source, Accessibility_Event *e)
 225 {
 226   GList *l;
 227   CORBA_Environment ev;
 228
 229   CORBA_exception_init (&ev);
 230
 231   for (l = listeners; l; l = l->next)
 232     {
 233       Accessibility_EventListener listener = l->data;
 234
 235       e->source = bonobo_object_dup_ref (BONOBO_OBJREF (source), &ev);
 236
 237       Accessibility_EventListener_notifyEvent (listener, e, &ev);
 238       /*
 239        * when this (oneway) call completes, the CORBA refcount and
 240        * Bonobo_Unknown refcount will be decremented by the recipient
 241        */
 242       CORBA_exception_free (&ev);
 243     }
 244 }
 245
 246 static void
 247 init_toolkit_names (GHashTable **generic_event_names, GHashTable **toolkit_event_names)
 248 {
 249         *toolkit_event_names = g_hash_table_new (g_str_hash, g_str_equal);
 250         *generic_event_names = g_hash_table_new (g_str_hash, g_str_equal);
 251         g_hash_table_insert (*toolkit_event_names,
 252                              "object:property-change",
 253                              "Gtk:AtkObject:property-change");
 254         g_hash_table_insert (*generic_event_names,
 255                              "Gtk:AtkObject:property-change",
 256                              "object:property-change");
 257 #ifdef SPI_DEBUG
 258         fprintf (stderr, "inserted spi_selection_changed hash\n");
 259 #endif
 260 }
 261
 262 static void
 263 spi_application_class_init (SpiApplicationClass *klass)
 264 {
 265   GObjectClass * object_class = (GObjectClass *) klass;
 266   POA_Accessibility_Application__epv *epv = &klass->epv;
 267
 268   spi_application_parent_class = g_type_class_ref (SPI_ACCESSIBLE_TYPE);
 269
 270   object_class->finalize = spi_accessible_application_finalize;
 271
 272   epv->_get_toolkitName = impl_accessibility_application_get_toolkit_name;
 273   epv->_get_version = impl_accessibility_application_get_version;
 274   epv->_get_id = impl_accessibility_application_get_id;
 275   epv->_set_id = impl_accessibility_application_set_id;
 276   epv->registerToolkitEventListener = impl_accessibility_application_register_toolkit_event_listener;
 277   epv->getLocale = impl_accessibility_application_get_locale;
 278   init_toolkit_names (&klass->generic_event_names, &klass->toolkit_event_names);
 279 }
 280
 281 static void
 282 spi_application_init (SpiApplication *application)
 283 {
 284   application->toolkit_listeners = NULL;
 285   the_app = application;
 286 }
 287
 288 BONOBO_TYPE_FUNC_FULL (SpiApplication,
 289                        Accessibility_Application,
 290                        PARENT_TYPE, spi_application)
 291
 292 SpiApplication *
 293 spi_application_new (AtkObject *app_root)
 294 {
 295   return SPI_APPLICATION (spi_accessible_construct (
 296                           SPI_APPLICATION_TYPE, app_root));
 297 }