atk-adaptor/devicelistener.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 /* devicelistener.c: implement the DeviceListener interface */
  25
  26 #include <config.h>
  27 #ifdef SPI_DEBUG
  28 #  include <stdio.h>
  29 #endif
  30 #include <libspi/listener.h>
  31 #include <libspi/devicelistener.h>
  32
  33 /* Our parent Gtk object type  */
  34 #define PARENT_TYPE BONOBO_TYPE_OBJECT
  35
  36 enum {
  37         DEVICE_EVENT,
  38         LAST_SIGNAL
  39 };
  40 static guint signals [LAST_SIGNAL];
  41
  42 /*
  43  * CORBA Accessibility::DeviceListener::keyEvent method implementation
  44  */
  45 static CORBA_boolean
  46 impl_device_event (PortableServer_Servant           servant,
  47                    const Accessibility_DeviceEvent *key,
  48                    CORBA_Environment               *ev)
  49 {
  50   gboolean was_consumed = FALSE;
  51   SpiDeviceListener *listener = SPI_DEVICE_LISTENER (
  52           bonobo_object_from_servant (servant));
  53
  54   g_signal_emit (G_OBJECT (listener), signals [DEVICE_EVENT], 0, key, &was_consumed);
  55
  56   return was_consumed;
  57 }
  58
  59 static gboolean
  60 boolean_handled_accumulator (GSignalInvocationHint *ihint,
  61                              GValue                *return_accu,
  62                              const GValue          *handler_return,
  63                              gpointer               dummy)
  64 {
  65   gboolean continue_emission;
  66   gboolean signal_handled;
  67
  68   signal_handled = g_value_get_boolean (handler_return);
  69   g_value_set_boolean (return_accu, signal_handled);
  70   continue_emission = !signal_handled;
  71
  72   return continue_emission;
  73 }
  74
  75 void
  76 marshal_BOOLEAN__POINTER (GClosure     *closure,
  77                           GValue       *return_value,
  78                           guint         n_param_values,
  79                           const GValue *param_values,
  80                           gpointer      invocation_hint,
  81                           gpointer      marshal_data)
  82 {
  83   typedef gboolean (*GMarshalFunc_BOOLEAN__POINTER) (gpointer     data1,
  84                                                      gpointer     arg_1,
  85                                                      gpointer     data2);
  86   register GMarshalFunc_BOOLEAN__POINTER callback;
  87   register GCClosure *cc = (GCClosure*) closure;
  88   register gpointer data1, data2;
  89   gboolean v_return;
  90
  91   g_return_if_fail (return_value != NULL);
  92   g_return_if_fail (n_param_values == 2);
  93
  94   if (G_CCLOSURE_SWAP_DATA (closure))
  95     {
  96       data1 = closure->data;
  97       data2 = g_value_peek_pointer (param_values + 0);
  98     }
  99   else
 100     {
 101       data1 = g_value_peek_pointer (param_values + 0);
 102       data2 = closure->data;
 103     }
 104   callback = (GMarshalFunc_BOOLEAN__POINTER) (marshal_data ? marshal_data : cc->callback);
 105
 106   v_return = callback (data1,
 107                        g_value_get_pointer (param_values + 1),
 108                        data2);
 109
 110   g_value_set_boolean (return_value, v_return);
 111 }
 112
 113 static void
 114 spi_device_listener_class_init (SpiDeviceListenerClass *klass)
 115 {
 116   POA_Accessibility_DeviceEventListener__epv *epv = &klass->epv;
 117
 118   signals [DEVICE_EVENT] = g_signal_new (
 119     "device_event",
 120     G_TYPE_FROM_CLASS (klass),
 121     G_SIGNAL_RUN_LAST,
 122     G_STRUCT_OFFSET (SpiDeviceListenerClass, device_event),
 123     boolean_handled_accumulator, NULL,
 124     marshal_BOOLEAN__POINTER,
 125     G_TYPE_BOOLEAN, 1, G_TYPE_POINTER);
 126
 127   epv->notifyEvent = impl_device_event;
 128 }
 129
 130 static void
 131 spi_device_listener_init (SpiDeviceListener *device_listener)
 132 {
 133 }
 134
 135 BONOBO_TYPE_FUNC_FULL (SpiDeviceListener,
 136                        Accessibility_DeviceEventListener,
 137                        BONOBO_TYPE_OBJECT,
 138                        spi_device_listener)
 139
 140 SpiDeviceListener *
 141 spi_device_listener_new (void)
 142 {
 143     SpiDeviceListener *retval = g_object_new (
 144             SPI_DEVICE_LISTENER_TYPE, NULL);
 145     return retval;
 146 }