qndefnfctextrecord.cpp

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// 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 <qndefnfctextrecord.h>
 
#include <QtCore/QStringConverter>
#include <QtCore/QLocale>
 
QT_BEGIN_NAMESPACE
 
QString QNdefNfcTextRecord::locale() const
{
    const QByteArray p = payload();
 
    if (p.isEmpty())
        return QString();
 
    quint8 status = p.at(0);
 
    quint8 codeLength = status & 0x3f;
 
    return QString::fromLatin1(p.constData() + 1, codeLength);
}
 
void QNdefNfcTextRecord::setLocale(const QString &locale)
{
    QByteArray p = payload();
 
    quint8 status = p.isEmpty() ? 0 : p.at(0);
 
    quint8 codeLength = status & 0x3f;
 
    quint8 newStatus = (status & 0xd0) | locale.size();
 
    p[0] = newStatus;
    p.replace(1, codeLength, locale.toLatin1());
 
    setPayload(p);
}
 
QString QNdefNfcTextRecord::text() const
{
    const QByteArray p = payload();
 
    if (p.isEmpty())
        return QString();
 
    quint8 status = p.at(0);
    bool utf16 = status & 0x80;
    quint8 codeLength = status & 0x3f;
 
    auto toUnicode = QStringDecoder(
        utf16 ? QStringDecoder::Encoding::Utf16BE : QStringDecoder::Encoding::Utf8,
        QStringDecoder::Flag::Stateless);
 
    return toUnicode(QByteArrayView(p.constData() + 1 + codeLength, p.size() - 1 - codeLength));
}
 
void QNdefNfcTextRecord::setText(const QString text)
{
    if (payload().isEmpty())
        setLocale(QLocale().name());
 
    QByteArray p = payload();
 
    quint8 status = p.at(0);
 
    bool utf16 = status & 0x80;
    quint8 codeLength = status & 0x3f;
 
    p.truncate(1 + codeLength);
 
    auto fromUnicode = QStringEncoder(
        utf16? QStringEncoder::Encoding::Utf16BE : QStringEncoder::Encoding::Utf8,
        QStringEncoder::Flag::Stateless|QStringEncoder::Flag::WriteBom);
 
    p += fromUnicode(text);
 
    setPayload(p);
}
 
QNdefNfcTextRecord::Encoding QNdefNfcTextRecord::encoding() const
{
    if (payload().isEmpty())
        return Utf8;
 
    QByteArray p = payload();
 
    quint8 status = p.at(0);
 
    bool utf16 = status & 0x80;
 
    if (utf16)
        return Utf16;
    else
        return Utf8;
}
 
void QNdefNfcTextRecord::setEncoding(Encoding encoding)
{
    QByteArray p = payload();
 
    quint8 status = p.isEmpty() ? 0 : p.at(0);
 
    QString string = text();
 
    if (encoding == Utf8)
        status &= ~0x80;
    else
        status |= 0x80;
 
    p[0] = status;
 
    setPayload(p);
 
    setText(string);
}
 
QT_END_NAMESPACE