libspi/desktop.c

   1 /*
   2  * AT-SPI - Assistive Technology Service Provider Interface
   3  * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap)
   4  *
   5  * Copyright 2001 Sun Microsystems Inc., Ximian Inc.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Library General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 /* desktop.c: implements SpiDesktop.idl */
  24
  25 #include <config.h>
  26 #include <stdio.h>
  27 #include <libbonobo.h>
  28 #include <libspi/desktop.h>
  29
  30 /* Our parent Gtk object type */
  31 #define PARENT_TYPE SPI_ACCESSIBLE_TYPE
  32
  33 typedef struct {
  34         SpiDesktop *desktop;
  35         Accessibility_Application ref;
  36 } Application;
  37
  38 /* A pointer to our parent object class */
  39 static SpiAccessibleClass *parent_class;
  40
  41 static void
  42 spi_desktop_init (SpiDesktop *desktop)
  43 {
  44   spi_base_construct_default (SPI_BASE (desktop));
  45
  46   desktop->applications = NULL;
  47
  48   atk_object_set_name (SPI_BASE (desktop)->atko, "main");
  49 }
  50
  51 static void
  52 spi_desktop_dispose (GObject *object)
  53 {
  54   SpiDesktop *desktop = (SpiDesktop *) object;
  55
  56   while (desktop->applications)
  57     {
  58       Application *app = (Application *) desktop->applications;
  59       spi_desktop_remove_application (desktop, app->ref);
  60     }
  61
  62   G_OBJECT_CLASS (parent_class)->dispose (object);
  63 }
  64
  65 static CORBA_long
  66 impl_desktop_get_child_count (PortableServer_Servant servant,
  67                               CORBA_Environment     *ev)
  68 {
  69   SpiDesktop *desktop = SPI_DESKTOP (bonobo_object_from_servant (servant));
  70
  71   if (desktop->applications)
  72     {
  73       return g_list_length (desktop->applications);
  74     }
  75   else
  76     {
  77       return 0;
  78     }
  79 }
  80
  81 static Accessibility_Accessible
  82 impl_desktop_get_child_at_index (PortableServer_Servant servant,
  83                                  const CORBA_long       index,
  84                                  CORBA_Environment     *ev)
  85 {
  86   SpiDesktop  *desktop = SPI_DESKTOP (bonobo_object_from_servant (servant));
  87   CORBA_Object retval;
  88   Application *app;
  89
  90   app = g_list_nth_data (desktop->applications, index);
  91
  92   if (app)
  93     {
  94       retval = bonobo_object_dup_ref (app->ref, ev);
  95       if (BONOBO_EX (ev))
  96         {
  97           retval = CORBA_OBJECT_NIL;
  98         }
  99     }
 100   else
 101     {
 102       retval = CORBA_OBJECT_NIL;
 103     }
 104
 105   return (Accessibility_Accessible) retval;
 106 }
 107
 108 static void
 109 spi_desktop_class_init (SpiDesktopClass *klass)
 110 {
 111   GObjectClass * object_class = (GObjectClass *) klass;
 112   SpiAccessibleClass * spi_accessible_class = (SpiAccessibleClass *) klass;
 113   POA_Accessibility_Accessible__epv *epv = &spi_accessible_class->epv;
 114
 115   object_class->dispose = spi_desktop_dispose;
 116
 117   parent_class = g_type_class_ref (SPI_ACCESSIBLE_TYPE);
 118
 119   epv->_get_childCount = impl_desktop_get_child_count;
 120   epv->getChildAtIndex = impl_desktop_get_child_at_index;
 121 }
 122
 123 BONOBO_TYPE_FUNC_FULL (SpiDesktop,
 124                        Accessibility_Desktop,
 125                        PARENT_TYPE,
 126                        spi_desktop);
 127
 128 SpiDesktop *
 129 spi_desktop_new (void)
 130 {
 131   SpiDesktop *retval = g_object_new (SPI_DESKTOP_TYPE, NULL);
 132
 133   return retval;
 134 }
 135
 136 static void
 137 abnormal_application_termination (gpointer object, Application *app)
 138 {
 139   g_return_if_fail (SPI_IS_DESKTOP (app->desktop));
 140
 141   spi_desktop_remove_application (app->desktop, app->ref);
 142 }
 143
 144 void
 145 spi_desktop_add_application (SpiDesktop *desktop,
 146                              const Accessibility_Application application)
 147 {
 148   CORBA_Environment ev;
 149   Application       *app;
 150   Accessibility_Application ref;
 151
 152   g_return_if_fail (SPI_IS_DESKTOP (desktop));
 153
 154   spi_desktop_remove_application (desktop, application);
 155
 156   CORBA_exception_init (&ev);
 157
 158   ref = bonobo_object_dup_ref (application, &ev);
 159
 160   if (!BONOBO_EX (&ev))
 161     {
 162       app = g_new (Application, 1);
 163       app->desktop = desktop;
 164       app->ref = ref;
 165
 166       desktop->applications = g_list_append (desktop->applications, app);
 167
 168       ORBit_small_listen_for_broken (app->ref, G_CALLBACK (abnormal_application_termination), app);
 169     }
 170
 171   CORBA_exception_free (&ev);
 172 }
 173
 174 void
 175 spi_desktop_remove_application (SpiDesktop *desktop,
 176                                 const Accessibility_Application app_ref)
 177 {
 178   GList *l;
 179   CORBA_Environment ev;
 180
 181   g_return_if_fail (SPI_IS_DESKTOP (desktop));
 182
 183   CORBA_exception_init (&ev);
 184
 185   for (l = desktop->applications; l; l = l->next)
 186     {
 187       Application *app = (Application *) l->data;
 188
 189       if (CORBA_Object_is_equivalent (app->ref, app_ref, &ev))
 190         {
 191           break;
 192         }
 193     }
 194
 195   CORBA_exception_free (&ev);
 196
 197   if (l)
 198     {
 199       Application *app = (Application *) l->data;
 200
 201       desktop->applications = g_list_delete_link (desktop->applications, l);
 202
 203       ORBit_small_unlisten_for_broken (app->ref, G_CALLBACK (abnormal_application_termination));
 204       bonobo_object_release_unref (app->ref, NULL);
 205       g_free (app);
 206     }
 207 }