// 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 "qaccessibleobject.h"

#if QT_CONFIG(accessibility)

#include <QtGui/QGuiApplication>

#include <QtGui/QWindow>

#include "qpointer.h"

#include "qmetaobject.h"

QT_BEGIN_NAMESPACE

class QAccessibleObjectPrivate

{

public:

    QPointer<QObject> object;

};

/*!

    \class QAccessibleObject

    \brief The QAccessibleObject class implements parts of the

    QAccessibleInterface for QObjects.

    \ingroup accessibility

    \inmodule QtGui

    This class is part of \l {Accessibility for QWidget Applications}.

    This class is mainly provided for convenience. All subclasses of

    the QAccessibleInterface that provide implementations of non-widget objects

    should use this class as their base class.

    \sa QAccessible, QAccessibleWidget

*/

/*!

    Creates a QAccessibleObject for \a object.

*/

QAccessibleObject::QAccessibleObject(QObject *object)

{

    d = new QAccessibleObjectPrivate;

    d->object = object;

}

/*!

    Destroys the QAccessibleObject.

    This only happens when a call to release() decrements the internal

    reference counter to zero.

*/

QAccessibleObject::~QAccessibleObject()

{

    delete d;

}

/*!

    \reimp

*/

QObject *QAccessibleObject::object() const

{

    return d->object;

}

/*!

    \reimp

*/

bool QAccessibleObject::isValid() const

{

    return !d->object.isNull();

}

/*! \reimp */

QRect QAccessibleObject::rect() const

{

    return QRect();

}

/*! \reimp */

void QAccessibleObject::setText(QAccessible::Text, const QString &)

{

}

/*! \reimp */

QAccessibleInterface *QAccessibleObject::childAt(int x, int y) const

{

    for (int i = 0; i < childCount(); ++i) {

        QAccessibleInterface *childIface = child(i);

        Q_ASSERT(childIface);

        if (childIface->isValid() && childIface->rect().contains(x,y))

            return childIface;

    }

    return nullptr;

}

/*!

    \class QAccessibleApplication

    \brief The QAccessibleApplication class implements the QAccessibleInterface for QApplication.

    \internal

    \ingroup accessibility

*/

/*!

    Creates a QAccessibleApplication for the QApplication object referenced by qApp.

*/

QAccessibleApplication::QAccessibleApplication()

: QAccessibleObject(qApp)

{

}

QWindow *QAccessibleApplication::window() const

{

    // an application can have several windows, and AFAIK we don't need

    // to notify about changes on the application.

    return nullptr;

}

// all toplevel windows except popups

static QObjectList topLevelObjects()

{

    QObjectList list;

    const QWindowList tlw(QGuiApplication::topLevelWindows());

    for (int i = 0; i < tlw.size(); ++i) {

        QWindow *w = tlw.at(i);

        if (w->type() != Qt::Popup) {

            if (QAccessibleInterface *root = w->accessibleRoot()) {

                if (root->object())

                    list.append(root->object());

            }

        }

    }

    return list;

}

/*! \reimp */

int QAccessibleApplication::childCount() const

{

    return topLevelObjects().size();

}

/*! \reimp */

int QAccessibleApplication::indexOfChild(const QAccessibleInterface *child) const

{

    if (!child)

        return -1;

    const QObjectList tlw(topLevelObjects());

    return tlw.indexOf(child->object());

}

QAccessibleInterface *QAccessibleApplication::parent() const

{

    return nullptr;

}

QAccessibleInterface *QAccessibleApplication::child(int index) const

{

    const QObjectList tlo(topLevelObjects());

    if (index >= 0 && index < tlo.size())

        return QAccessible::queryAccessibleInterface(tlo.at(index));

    return nullptr;

}

/*! \reimp */

QAccessibleInterface *QAccessibleApplication::focusChild() const

{

    if (QWindow *window = QGuiApplication::focusWindow())

        return window->accessibleRoot();

    return nullptr;

}

/*! \reimp */

QString QAccessibleApplication::text(QAccessible::Text t) const

{

    switch (t) {

    case QAccessible::Name:

        return QGuiApplication::applicationName();

    case QAccessible::Description:

        return QGuiApplication::applicationFilePath();

    case QAccessible::Identifier:

        return QGuiApplication::desktopFileName();

    default:

        break;

    }

    return QString();

}

/*! \reimp */

QAccessible::Role QAccessibleApplication::role() const

{

    return QAccessible::Application;

}

/*! \reimp */

QAccessible::State QAccessibleApplication::state() const

{

    return QAccessible::State();

}

QT_END_NAMESPACE

#endif // QT_CONFIG(accessibility)