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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
++
++ /*!
++ \class QNdefNfcTextRecord
++ \brief The QNdefNfcTextRecord class provides an NFC RTD-Text.
++
++ \ingroup connectivity-nfc
++ \inmodule QtNfc
++ \since 5.2
++
++ RTD-Text encapsulates a user displayable text record.
++ */
++
++ /*!
++ \enum QNdefNfcTextRecord::Encoding
++
++ This enum describes the text encoding standard used.
++
++ \value Utf8 The text is encoded with UTF-8.
++ \value Utf16 The text is encoding with UTF-16.
++ */
++
++ /*!
++ \fn QNdefNfcTextRecord::QNdefNfcTextRecord()
++
++ Constructs an empty NFC text record of type \l QNdefRecord::NfcRtd.
++ */
++
++ /*!
++ \fn QNdefNfcTextRecord::QNdefNfcTextRecord(const QNdefRecord& other)
++
++ Constructs a new NFC text record that is a copy of \a other.
++ */
++
++ /*!
++ Returns the locale of the text record.
++ */
++ QString QNdefNfcTextRecord::locale() const
++ {
++ const QByteArray p = payload();
++
++ if (p.isEmpty())
++ return QString();
++
++ const quint8 status = p.at(0);
++
++ const quint8 codeLength = status & 0x3f;
++
++ if (p.size() < 1 + codeLength)
++ return QString();
++
++ return QString::fromLatin1(p.constData() + 1, codeLength);
++ }
++
++ /*!
++ Sets the locale of the text record to \a locale. Locales longer
++ than 63 bytes will be truncated.
++ */
++ void QNdefNfcTextRecord::setLocale(const QString &locale)
++ {
++ QByteArray p = payload();
++
++ const quint8 status = p.isEmpty() ? 0 : p.at(0);
++
++ const quint8 codeLength = status & 0x3f;
++
++ // Preserve encoding and RFU bits only (bits 7 and 6)
++ const quint8 statusWithoutLanguageCodeLength = status & 0xc0;
++
++ QByteArray localeData = locale.toLatin1();
++ if (localeData.size() > 0x3f) {
++ qWarning("QNdefNfcTextRecord::setLocale(): locale is %" PRIdQSIZETYPE " bytes long but max "
++ "is 63. Truncating it.", localeData.size());
++ localeData.truncate(0x3f);
++ }
++
++ const quint8 newStatus = statusWithoutLanguageCodeLength | localeData.size();
++
++ p[0] = newStatus;
++ p.replace(1, codeLength, localeData);
++
++ setPayload(p);
++ }
++
++ /*!
++ Returns the contents of the text record as a string.
++ */
++ QString QNdefNfcTextRecord::text() const
++ {
++ const QByteArray p = payload();
++
++ if (p.isEmpty())
++ return QString();
++
++ const quint8 status = p.at(0);
++ const bool utf16 = status & 0x80;
++ const quint8 codeLength = status & 0x3f;
++
++ if (p.size() < 1 + codeLength)
++ return QString();
++
++ auto toUnicode = QStringDecoder(
++ utf16 ? QStringDecoder::Encoding::Utf16BE : QStringDecoder::Encoding::Utf8,
++ QStringDecoder::Flag::Stateless);
++
++ return toUnicode(QByteArrayView(p.constData() + 1 + codeLength, p.size() - 1 - codeLength));
++ }
++
++ /*!
++ Sets the contents of the text record to \a text.
++ */
++ void QNdefNfcTextRecord::setText(const QString text)
++ {
++ if (payload().isEmpty())
++ setLocale(QLocale().name());
++
++ QByteArray p = payload();
++
++ const quint8 status = p.at(0);
++
++ const bool utf16 = status & 0x80;
++ const 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);
++ }
++
++ /*!
++ Returns the encoding of the contents.
++ */
++ QNdefNfcTextRecord::Encoding QNdefNfcTextRecord::encoding() const
++ {
++ if (payload().isEmpty())
++ return Utf8;
++
++ QByteArray p = payload();
++
++ const quint8 status = p.at(0);
++
++ const bool utf16 = status & 0x80;
++
++ if (utf16)
++ return Utf16;
++ else
++ return Utf8;
++ }
++
++ /*!
++ Sets the enconding of the contents to \a encoding.
++ */
++ void QNdefNfcTextRecord::setEncoding(Encoding encoding)
++ {
++ QByteArray p = payload();
++
++ quint8 status = p.isEmpty() ? 0 : p.at(0);
++
++ const QString string = text();
++
++ if (encoding == Utf8)
++ status &= ~0x80;
++ else
++ status |= 0x80;
++
++ p[0] = status;
++
++ setPayload(p);
++
++ setText(string);
++ }
++
++ QT_END_NAMESPACE