// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include "qplatformaccessibility.h"

#include <private/qfactoryloader_p.h>

#include "qaccessibleplugin.h"

#include "qaccessibleobject.h"

#include "qaccessiblebridge.h"

#include <QtGui/QGuiApplication>

#include <QDebug>

QT_BEGIN_NAMESPACE

using namespace Qt::StringLiterals;

#if QT_CONFIG(accessibility)

/* accessiblebridge plugin discovery stuff */

Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, bridgeloader,

    (QAccessibleBridgeFactoryInterface_iid, "/accessiblebridge"_L1))

Q_GLOBAL_STATIC(QList<QAccessibleBridge *>, bridges)

/*!

    \class QPlatformAccessibility

    \since 5.0

    \internal

    \preliminary

    \ingroup qpa

    \ingroup accessibility

    \brief The QPlatformAccessibility class is the base class for

    integrating accessibility backends

    \sa QAccessible

*/

QPlatformAccessibility::QPlatformAccessibility()

{

}

QPlatformAccessibility::~QPlatformAccessibility()

{

}

void QPlatformAccessibility::notifyAccessibilityUpdate(QAccessibleEvent *event)

{

    initialize();

    if (!bridges() || bridges()->isEmpty())

        return;

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

        bridges()->at(i)->notifyAccessibilityUpdate(event);

}

void QPlatformAccessibility::setRootObject(QObject *o)

{

    initialize();

    if (bridges()->isEmpty())

        return;

    if (!o)

        return;

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

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

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

    }

}

void QPlatformAccessibility::initialize()

{

    static bool isInit = false;

    if (isInit)

        return;

    isInit = true;      // ### not atomic

    typedef QMultiMap<int, QString> PluginKeyMap;

    typedef PluginKeyMap::const_iterator PluginKeyMapConstIterator;

    const PluginKeyMap keyMap = bridgeloader()->keyMap();

    QAccessibleBridgePlugin *factory = nullptr;

    int i = -1;

    const PluginKeyMapConstIterator cend = keyMap.constEnd();

    for (PluginKeyMapConstIterator it = keyMap.constBegin(); it != cend; ++it) {

        if (it.key() != i) {

            i = it.key();

            factory = qobject_cast<QAccessibleBridgePlugin*>(bridgeloader()->instance(i));

        }

        if (factory)

            if (QAccessibleBridge *bridge = factory->create(it.value()))

                bridges()->append(bridge);

    }

}

void QPlatformAccessibility::cleanup()

{

    qDeleteAll(*bridges());

}

void qAccessibleNotifyActivationObservers(bool active); // qaccessible.cpp

void QPlatformAccessibility::setActive(bool active)

{

    m_active = active;

    // Send activeChanged notifications if the new active status differs from

    // the notifed one.

    if ((active && m_activeNotificationState != std::optional<bool>{true}) ||

        (!active && m_activeNotificationState != std::optional<bool>{false})) {

        qAccessibleNotifyActivationObservers(active);

    }

    m_activeNotificationState = active;

}

void QPlatformAccessibility::clearActiveNotificationState()

{

    m_activeNotificationState = std::nullopt;

}

#endif // QT_CONFIG(accessibility)

QT_END_NAMESPACE