/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

// This file is included from qnsview.mm, and only used to organize the code

#include "qcocoaaccessibility.h"
#include "qcocoaaccessibilityelement.h"
#include "qcocoaintegration.h"

#include <QtGui/qaccessible.h>

#include <AppKit/NSAccessibility.h>

@implementation QNSView (Accessibility)

- (id)childAccessibleElement
{
    QCocoaWindow *platformWindow = self.platformWindow;
    if (!platformWindow || !platformWindow->window()->accessibleRoot())
        return nil;

    QAccessible::Id childId = QAccessible::uniqueId(platformWindow->window()->accessibleRoot());
    return [QMacAccessibilityElement elementWithId:childId];
}

// The QNSView is a container that the user does not interact directly with:
// Remove it from the user-visible accessibility tree.
- (BOOL)accessibilityIsIgnored
{
    return YES;
}

- (id)accessibilityAttributeValue:(NSString *)attribute
{
    // activate accessibility updates
    QCocoaIntegration::instance()->accessibility()->setActive(true);

    if ([attribute isEqualToString:NSAccessibilityChildrenAttribute])
        return NSAccessibilityUnignoredChildrenForOnlyChild([self childAccessibleElement]);
    else
        return [super accessibilityAttributeValue:attribute];
}

- (id)accessibilityHitTest:(NSPoint)point
{
    return [[self childAccessibleElement] accessibilityHitTest:point];
}

- (id)accessibilityFocusedUIElement
{
    return [[self childAccessibleElement] accessibilityFocusedUIElement];
}

@end
