gtk2/gtk/a11y/gtkcontaineraccessible.c
Matthias Clasen ef62a872f5 GtkContainerAccessible: avoid resurrecting accessibles
When removing a child, we don't want to resurrect its
accessible needlessly.
2014-10-14 23:58:37 -04:00

229 lines
6.6 KiB
C

/* GTK+ - accessibility implementations
* 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 "gtkcontaineraccessible.h"
#include "gtkcontaineraccessibleprivate.h"
#include <gtk/gtk.h>
#include "gtkwidgetprivate.h"
struct _GtkContainerAccessiblePrivate
{
GList *children;
};
G_DEFINE_TYPE_WITH_PRIVATE (GtkContainerAccessible, gtk_container_accessible, GTK_TYPE_WIDGET_ACCESSIBLE)
static void
count_widget (GtkWidget *widget,
gint *count)
{
(*count)++;
}
static gint
gtk_container_accessible_get_n_children (AtkObject* obj)
{
GtkWidget *widget;
gint count = 0;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (widget == NULL)
return 0;
gtk_container_foreach (GTK_CONTAINER (widget), (GtkCallback) count_widget, &count);
return count;
}
static AtkObject *
gtk_container_accessible_ref_child (AtkObject *obj,
gint i)
{
GList *children, *tmp_list;
AtkObject *accessible;
GtkWidget *widget;
widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
if (widget == NULL)
return NULL;
children = gtk_container_get_children (GTK_CONTAINER (widget));
tmp_list = g_list_nth (children, i);
if (!tmp_list)
{
g_list_free (children);
return NULL;
}
accessible = gtk_widget_get_accessible (GTK_WIDGET (tmp_list->data));
g_list_free (children);
g_object_ref (accessible);
return accessible;
}
void
_gtk_container_accessible_add (GtkWidget *parent,
GtkWidget *child)
{
GtkContainerAccessible *accessible;
GtkContainerAccessibleClass *klass;
AtkObject *obj;
obj = _gtk_widget_peek_accessible (GTK_WIDGET (parent));
if (!GTK_IS_CONTAINER_ACCESSIBLE (obj))
return;
accessible = GTK_CONTAINER_ACCESSIBLE (obj);
klass = GTK_CONTAINER_ACCESSIBLE_GET_CLASS (accessible);
if (klass->add_gtk)
klass->add_gtk (GTK_CONTAINER (parent), child, obj);
}
void
_gtk_container_accessible_remove (GtkWidget *parent,
GtkWidget *child)
{
GtkContainerAccessible *accessible;
GtkContainerAccessibleClass *klass;
AtkObject *obj;
obj = _gtk_widget_peek_accessible (GTK_WIDGET (parent));
if (!GTK_IS_CONTAINER_ACCESSIBLE (obj))
return;
accessible = GTK_CONTAINER_ACCESSIBLE (obj);
klass = GTK_CONTAINER_ACCESSIBLE_GET_CLASS (accessible);
if (klass->remove_gtk)
klass->remove_gtk (GTK_CONTAINER (parent), child, obj);
}
static gint
gtk_container_accessible_real_add_gtk (GtkContainer *container,
GtkWidget *widget,
gpointer data)
{
AtkObject *atk_parent;
AtkObject *atk_child;
GtkContainerAccessible *accessible;
gint index;
atk_parent = ATK_OBJECT (data);
atk_child = gtk_widget_get_accessible (widget);
accessible = GTK_CONTAINER_ACCESSIBLE (atk_parent);
g_list_free (accessible->priv->children);
accessible->priv->children = gtk_container_get_children (container);
index = g_list_index (accessible->priv->children, widget);
_gtk_container_accessible_add_child (accessible, atk_child, index);
return 1;
}
static gint
gtk_container_accessible_real_remove_gtk (GtkContainer *container,
GtkWidget *widget,
gpointer data)
{
AtkObject* atk_parent;
AtkObject *atk_child;
GtkContainerAccessible *accessible;
gint index;
atk_parent = ATK_OBJECT (data);
atk_child = _gtk_widget_peek_accessible (widget);
if (atk_child == NULL)
return 1;
accessible = GTK_CONTAINER_ACCESSIBLE (atk_parent);
index = g_list_index (accessible->priv->children, widget);
g_list_free (accessible->priv->children);
accessible->priv->children = gtk_container_get_children (container);
if (index >= 0)
_gtk_container_accessible_remove_child (accessible, atk_child, index);
return 1;
}
static void
gtk_container_accessible_real_initialize (AtkObject *obj,
gpointer data)
{
GtkContainerAccessible *accessible = GTK_CONTAINER_ACCESSIBLE (obj);
ATK_OBJECT_CLASS (gtk_container_accessible_parent_class)->initialize (obj, data);
accessible->priv->children = gtk_container_get_children (GTK_CONTAINER (data));
obj->role = ATK_ROLE_PANEL;
}
static void
gtk_container_accessible_finalize (GObject *object)
{
GtkContainerAccessible *accessible = GTK_CONTAINER_ACCESSIBLE (object);
g_list_free (accessible->priv->children);
G_OBJECT_CLASS (gtk_container_accessible_parent_class)->finalize (object);
}
static void
gtk_container_accessible_class_init (GtkContainerAccessibleClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
gobject_class->finalize = gtk_container_accessible_finalize;
class->get_n_children = gtk_container_accessible_get_n_children;
class->ref_child = gtk_container_accessible_ref_child;
class->initialize = gtk_container_accessible_real_initialize;
klass->add_gtk = gtk_container_accessible_real_add_gtk;
klass->remove_gtk = gtk_container_accessible_real_remove_gtk;
}
static void
gtk_container_accessible_init (GtkContainerAccessible *container)
{
container->priv = gtk_container_accessible_get_instance_private (container);
}
void
_gtk_container_accessible_add_child (GtkContainerAccessible *accessible,
AtkObject *child,
gint index)
{
g_object_notify (G_OBJECT (child), "accessible-parent");
g_signal_emit_by_name (accessible, "children-changed::add", index, child, NULL);
}
void
_gtk_container_accessible_remove_child (GtkContainerAccessible *accessible,
AtkObject *child,
gint index)
{
g_object_notify (G_OBJECT (child), "accessible-parent");
g_signal_emit_by_name (accessible, "children-changed::remove", index, child, NULL);
}