157 lines
3.8 KiB
C
157 lines
3.8 KiB
C
/* GTK+ - accessibility implementations
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* Copyright 2011, F123 Consulting & Mais Diferenças
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* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <gtk/gtk.h>
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#include "gtkaccessibility.h"
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#include "gtkaccessibilityutil.h"
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#include "gtktoplevelaccessible.h"
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static GSList *key_listener_list = NULL;
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typedef struct {
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AtkKeySnoopFunc func;
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gpointer data;
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guint key;
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} KeyEventListener;
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static guint
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add_key_event_listener (AtkKeySnoopFunc listener_func,
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gpointer listener_data)
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{
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static guint key = 0;
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KeyEventListener *listener;
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key++;
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listener = g_slice_new0 (KeyEventListener);
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listener->func = listener_func;
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listener->data = listener_data;
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listener->key = key;
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key_listener_list = g_slist_append (key_listener_list, listener);
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return key;
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}
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static void
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remove_key_event_listener (guint listener_key)
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{
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GSList *l;
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for (l = key_listener_list; l; l = l->next)
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{
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KeyEventListener *listener = l->data;
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if (listener->key == listener_key)
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{
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g_slice_free (KeyEventListener, listener);
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key_listener_list = g_slist_delete_link (key_listener_list, l);
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break;
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}
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}
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}
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static AtkObject *
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get_root (void)
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{
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static AtkObject *root = NULL;
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if (!root)
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{
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root = g_object_new (GTK_TYPE_TOPLEVEL_ACCESSIBLE, NULL);
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atk_object_initialize (root, NULL);
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}
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return root;
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}
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static const gchar *
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get_toolkit_name (void)
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{
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return "gtk";
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}
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static const gchar *
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get_toolkit_version (void)
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{
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return GTK_VERSION;
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}
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void
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_gtk_accessibility_override_atk_util (void)
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{
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AtkUtilClass *atk_class = ATK_UTIL_CLASS (g_type_class_ref (ATK_TYPE_UTIL));
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atk_class->add_key_event_listener = add_key_event_listener;
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atk_class->remove_key_event_listener = remove_key_event_listener;
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atk_class->get_root = get_root;
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atk_class->get_toolkit_name = get_toolkit_name;
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atk_class->get_toolkit_version = get_toolkit_version;
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}
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static void
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atk_key_event_from_gdk_event_key (GdkEventKey *key,
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AtkKeyEventStruct *event)
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{
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if (key->type == GDK_KEY_PRESS)
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event->type = ATK_KEY_EVENT_PRESS;
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else if (key->type == GDK_KEY_RELEASE)
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event->type = ATK_KEY_EVENT_RELEASE;
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else
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g_assert_not_reached ();
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event->state = key->state;
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event->keyval = key->keyval;
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event->length = key->length;
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if (key->string && key->string[0] &&
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(key->state & GDK_CONTROL_MASK ||
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g_unichar_isgraph (g_utf8_get_char (key->string))))
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event->string = key->string;
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else
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event->string = gdk_keyval_name (key->keyval);
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event->keycode = key->hardware_keycode;
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event->timestamp = key->time;
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}
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gboolean
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_gtk_accessibility_key_snooper (GtkWidget *widget,
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GdkEventKey *event)
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{
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GSList *l;
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AtkKeyEventStruct atk_event;
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gboolean result;
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result = FALSE;
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atk_key_event_from_gdk_event_key (event, &atk_event);
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for (l = key_listener_list; l; l = l->next)
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{
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KeyEventListener *listener = l->data;
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result |= listener->func (&atk_event, listener->data);
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}
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return result;
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}
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