/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtGui module of the Qt Toolkit.

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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

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** $QT_END_LICENSE$

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****************************************************************************/

#include "qaccessible.h"

#include "qaccessiblebridge.h"

#ifndef QT_NO_ACCESSIBILITY

#include "qcoreapplication.h"

#include "qmutex.h"

#include "qvector.h"

#include "private/qfactoryloader_p.h"

#include <stdlib.h>

QT_BEGIN_NAMESPACE

#ifndef QT_NO_LIBRARY

Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,

    (QAccessibleBridgeFactoryInterface_iid, QLatin1String("/accessiblebridge")))

#endif

Q_GLOBAL_STATIC(QVector<QAccessibleBridge *>, bridges)

static bool isInit = false;

void QAccessible::initialize()

{

    if (isInit)

        return;

    isInit = true;

    if (qgetenv("QT_ACCESSIBILITY") != "1")

        return;

#ifndef QT_NO_LIBRARY

    const QStringList l = loader()->keys();

    for (int i = 0; i < l.count(); ++i) {

        if (QAccessibleBridgeFactoryInterface *factory =

                qobject_cast<QAccessibleBridgeFactoryInterface*>(loader()->instance(l.at(i)))) {

            QAccessibleBridge * bridge = factory->create(l.at(i));

            if (bridge)

                bridges()->append(bridge);

        }

    }

#endif

}

void QAccessible::cleanup()

{

    qDeleteAll(*bridges());

}

void QAccessible::updateAccessibility(QObject *o, int who, Event reason)

{

    Q_ASSERT(o);

    if (updateHandler) {

        updateHandler(o, who, reason);

        return;

    }

    initialize();

    if (bridges()->isEmpty())

        return;

    QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(o);

    if (!iface)

        return;

    for (int i = 0; i < bridges()->count(); ++i)

        bridges()->at(i)->notifyAccessibilityUpdate(reason, iface, who);

    delete iface;

}

void QAccessible::setRootObject(QObject *o)

{

    if (rootObjectHandler) {

        rootObjectHandler(o);

        return;

    }

    initialize();

    if (bridges()->isEmpty())

        return;

    if (!o)

        return;

    for (int i = 0; i < bridges()->count(); ++i) {

        QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(o);

        bridges()->at(i)->setRootObject(iface);

    }

}

QT_END_NAMESPACE

#endif // QT_NO_ACCESSIBILITY