// 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

#ifndef QACCESSIBLECACHE_P

#define QACCESSIBLECACHE_P

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <QtGui/private/qtguiglobal_p.h>

#include <QtCore/qobject.h>

#include <QtCore/qhash.h>

#include "qaccessible.h"

#if QT_CONFIG(accessibility)

Q_FORWARD_DECLARE_OBJC_CLASS(QT_MANGLE_NAMESPACE(QMacAccessibilityElement));

QT_BEGIN_NAMESPACE

class Q_GUI_EXPORT QAccessibleObjectDestroyedEvent :public QAccessibleEvent

{

public:

    /* A regular event, used when the object is still alive

    */

    inline QAccessibleObjectDestroyedEvent(QObject *obj)

        : QAccessibleEvent(obj, QAccessible::ObjectDestroyed)

    {

    }

    /* A regular event, used when there is no object

    */

    inline QAccessibleObjectDestroyedEvent(QAccessibleInterface *iface)

        : QAccessibleEvent(static_cast<QObject *>(nullptr), QAccessible::ObjectDestroyed)

    {

        m_uniqueId = QAccessible::uniqueId(iface);

    }

    /* An event with object() == nullptr, and uniqueid set,

    used during object destruction */

    inline QAccessibleObjectDestroyedEvent(QAccessible::Id uniqueId)

        : QAccessibleEvent(static_cast<QObject *>(nullptr), QAccessible::ObjectDestroyed)

    {

        m_uniqueId = uniqueId;

    }

    ~QAccessibleObjectDestroyedEvent();

};

class Q_GUI_EXPORT QAccessibleCache  :public QObject

{

    Q_OBJECT

public:

    ~QAccessibleCache() override;

    static QAccessibleCache *instance();

    QAccessibleInterface *interfaceForId(QAccessible::Id id) const;

    QAccessible::Id idForInterface(QAccessibleInterface *iface) const;

    QAccessible::Id idForObject(QObject *obj) const;

    bool containsObject(QObject *obj) const;

    QAccessible::Id insert(QObject *object, QAccessibleInterface *iface) const;

    void deleteInterface(QAccessible::Id id, QObject *obj = nullptr);

    void sendObjectDestroyedEvent(QObject *obj);

#ifdef Q_OS_APPLE

    QT_MANGLE_NAMESPACE(QMacAccessibilityElement) *elementForId(QAccessible::Id axid) const;

    bool insertElement(QAccessible::Id axid, QT_MANGLE_NAMESPACE(QMacAccessibilityElement) *element) const;

#endif

private Q_SLOTS:

    void objectDestroyed(QObject *obj);

private:

    QAccessible::Id acquireId() const;

    mutable QHash<QAccessible::Id, QAccessibleInterface *> idToInterface;

    mutable QHash<QAccessibleInterface *, QAccessible::Id> interfaceToId;

    mutable QMultiHash<QObject *, std::pair<QAccessible::Id, const QMetaObject*>> objectToId;

#ifdef Q_OS_APPLE

    void removeAccessibleElement(QAccessible::Id axid);

    mutable QHash<QAccessible::Id, QT_MANGLE_NAMESPACE(QMacAccessibilityElement) *> accessibleElements;

#endif

    friend class QAccessible;

    friend class QAccessibleInterface;

};

QT_END_NAMESPACE

#endif // QT_CONFIG(accessibility)

#endif