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/* GTK+ - accessibility implementations
* Copyright 2011, F123 Consulting & Mais Diferenças
* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <gtk/gtk.h>
#include "gtkaccessibility.h"
#include "gtkaccessibilityutil.h"
#include "gtktoplevelaccessible.h"
static GSList *key_listener_list = NULL;
typedef struct {
AtkKeySnoopFunc func;
gpointer data;
guint key;
} KeyEventListener;
static guint
add_key_event_listener (AtkKeySnoopFunc listener_func,
gpointer listener_data)
{
static guint key = 0;
KeyEventListener *listener;
key++;
listener = g_slice_new0 (KeyEventListener);
listener->func = listener_func;
listener->data = listener_data;
listener->key = key;
key_listener_list = g_slist_append (key_listener_list, listener);
return key;
}
static void
remove_key_event_listener (guint listener_key)
{
GSList *l;
for (l = key_listener_list; l; l = l->next)
{
KeyEventListener *listener = l->data;
if (listener->key == listener_key)
{
g_slice_free (KeyEventListener, listener);
key_listener_list = g_slist_delete_link (key_listener_list, l);
break;
}
}
}
static AtkObject *
get_root (void)
{
static AtkObject *root = NULL;
if (!root)
{
root = g_object_new (GTK_TYPE_TOPLEVEL_ACCESSIBLE, NULL);
atk_object_initialize (root, NULL);
}
return root;
}
void
_gtk_accessibility_override_atk_util (void)
{
AtkUtilClass *atk_class = ATK_UTIL_CLASS (g_type_class_ref (ATK_TYPE_UTIL));
atk_class->add_key_event_listener = add_key_event_listener;
atk_class->remove_key_event_listener = remove_key_event_listener;
atk_class->get_root = get_root;
}
static void
atk_key_event_from_gdk_event_key (GdkEventKey *key,
AtkKeyEventStruct *event)
{
GdkEventType type;
GdkModifierType state;
guint keyval;
guint16 keycode;
type = gdk_event_get_event_type ((GdkEvent *)key);
gdk_event_get_state ((GdkEvent *)key, &state);
gdk_event_get_keyval ((GdkEvent *)key, &keyval);
gdk_event_get_keycode ((GdkEvent *)key, &keycode);
if (type == GDK_KEY_PRESS)
event->type = ATK_KEY_EVENT_PRESS;
else if (type == GDK_KEY_RELEASE)
event->type = ATK_KEY_EVENT_RELEASE;
else
g_assert_not_reached ();
event->state = state;
event->keyval = keyval;
event->string = gdk_keyval_name (keyval);
event->length = strlen (event->string);
event->keycode = keycode;
event->timestamp = gdk_event_get_time ((GdkEvent *)key);
}
gboolean
_gtk_accessibility_key_snooper (GtkWidget *widget,
GdkEventKey *event)
{
GSList *l;
AtkKeyEventStruct atk_event;
gboolean result;
result = FALSE;
atk_key_event_from_gdk_event_key (event, &atk_event);
for (l = key_listener_list; l; l = l->next)
{
KeyEventListener *listener = l->data;
result |= listener->func (&atk_event, listener->data);
}
return result;
}
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