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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "accessibility_activation_observer.h"
#ifndef QT_NO_ACCESSIBILITY
#include "content/browser/accessibility/browser_accessibility_state_impl.h"
namespace QtWebEngineCore {
namespace {
bool isAccessibilityEnabled() {
// On Linux accessibility is disabled by default due to performance issues,
// and can be re-enabled by setting the QTWEBENGINE_ENABLE_LINUX_ACCESSIBILITY environment
// variable. For details, see QTBUG-59922.
#ifdef Q_OS_LINUX
static bool accessibility_enabled
= qEnvironmentVariableIsSet("QTWEBENGINE_ENABLE_LINUX_ACCESSIBILITY");
#else
const bool accessibility_enabled = true;
#endif
return accessibility_enabled;
}
} // namespace
AccessibilityActivationObserver::AccessibilityActivationObserver()
{
if (isAccessibilityEnabled()) {
QAccessible::installActivationObserver(this);
if (QAccessible::isActive())
content::BrowserAccessibilityStateImpl::GetInstance()->EnableAccessibility();
}
}
AccessibilityActivationObserver::~AccessibilityActivationObserver()
{
QAccessible::removeActivationObserver(this);
}
void AccessibilityActivationObserver::accessibilityActiveChanged(bool active)
{
if (active)
content::BrowserAccessibilityStateImpl::GetInstance()->EnableAccessibility();
else
content::BrowserAccessibilityStateImpl::GetInstance()->DisableAccessibility();
}
} // namespace QtWebEngineCore
#endif // QT_NO_ACCESSIBILITY
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