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

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

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

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** ensure the GNU Lesser General Public License version 3 requirements

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** General Public License version 2.0 or (at your option) the GNU General

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

#include "qguiapplication.h"

#include <private/qobject_p.h>

#include "qkeymapper_p.h"

#include <private/qguiapplication_p.h>

#include <qpa/qplatformintegration.h>

QT_BEGIN_NAMESPACE

/*!

    \class QKeyMapper

    \since 4.2

    \internal

    \sa QObject

*/

/*!

    Constructs a new key mapper.

*/

QKeyMapper::QKeyMapper()

    : QObject(*new QKeyMapperPrivate, nullptr)

{

}

/*!

    Destroys the key mapper.

*/

QKeyMapper::~QKeyMapper()

{

}

QList<int> QKeyMapper::possibleKeys(QKeyEvent *e)

{

    QList<int> result;

    if (!e->nativeScanCode()) {

        if (e->key() && (e->key() != Qt::Key_unknown))

            result << int(e->key() + e->modifiers());

        else if (!e->text().isEmpty())

            result << int(e->text().at(0).unicode() + e->modifiers());

        return result;

    }

    return instance()->d_func()->possibleKeys(e);

}

extern bool qt_sendSpontaneousEvent(QObject *receiver, QEvent *event); // in qapplication_*.cpp

void QKeyMapper::changeKeyboard()

{

    instance()->d_func()->clearMappings();

    // ## TODO: Support KeyboardLayoutChange on QPA

#if 0

    // inform all toplevel widgets of the change

    QEvent e(QEvent::KeyboardLayoutChange);

    QWidgetList list = QApplication::topLevelWidgets();

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

        QWidget *w = list.at(i);

        qt_sendSpontaneousEvent(w, &e);

    }

#endif

}

Q_GLOBAL_STATIC(QKeyMapper, keymapper)

/*!

    Returns the pointer to the single instance of QKeyMapper in the application.

    If none yet exists, the function ensures that one is created.

*/

QKeyMapper *QKeyMapper::instance()

{

    return keymapper();

}

QKeyMapperPrivate *qt_keymapper_private()

{

    return QKeyMapper::instance()->d_func();

}

QKeyMapperPrivate::QKeyMapperPrivate()

{

    keyboardInputLocale = QLocale::system();

    keyboardInputDirection = keyboardInputLocale.textDirection();

}

QKeyMapperPrivate::~QKeyMapperPrivate()

{

    // clearMappings();

}

void QKeyMapperPrivate::clearMappings()

{

}

QList<int> QKeyMapperPrivate::possibleKeys(QKeyEvent *e)

{

    QList<int> result = QGuiApplicationPrivate::platformIntegration()->possibleKeys(e);

    if (!result.isEmpty())

        return result;

    if (e->key() && (e->key() != Qt::Key_unknown))

        result << int(e->key() + e->modifiers());

    else if (!e->text().isEmpty())

        result << int(e->text().at(0).unicode() + e->modifiers());

    return result;

}

QT_END_NAMESPACE

#include "moc_qkeymapper_p.cpp"