1 | // Copyright (C) 2016 The Qt Company Ltd. |
---|---|
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | #include <qndefnfctextrecord.h> |
5 | |
6 | #include <QtCore/QStringConverter> |
7 | #include <QtCore/QLocale> |
8 | |
9 | QT_BEGIN_NAMESPACE |
10 | |
11 | /*! |
12 | \class QNdefNfcTextRecord |
13 | \brief The QNdefNfcTextRecord class provides an NFC RTD-Text. |
14 | |
15 | \ingroup connectivity-nfc |
16 | \inmodule QtNfc |
17 | \since 5.2 |
18 | |
19 | RTD-Text encapsulates a user displayable text record. |
20 | */ |
21 | |
22 | /*! |
23 | \enum QNdefNfcTextRecord::Encoding |
24 | |
25 | This enum describes the text encoding standard used. |
26 | |
27 | \value Utf8 The text is encoded with UTF-8. |
28 | \value Utf16 The text is encoding with UTF-16. |
29 | */ |
30 | |
31 | /*! |
32 | \fn QNdefNfcTextRecord::QNdefNfcTextRecord() |
33 | |
34 | Constructs an empty NFC text record of type \l QNdefRecord::NfcRtd. |
35 | */ |
36 | |
37 | /*! |
38 | \fn QNdefNfcTextRecord::QNdefNfcTextRecord(const QNdefRecord& other) |
39 | |
40 | Constructs a new NFC text record that is a copy of \a other. |
41 | */ |
42 | |
43 | /*! |
44 | Returns the locale of the text record. |
45 | */ |
46 | QString QNdefNfcTextRecord::locale() const |
47 | { |
48 | const QByteArray p = payload(); |
49 | |
50 | if (p.isEmpty()) |
51 | return QString(); |
52 | |
53 | quint8 status = p.at(i: 0); |
54 | |
55 | quint8 codeLength = status & 0x3f; |
56 | |
57 | return QString::fromLatin1(str: p.constData() + 1, size: codeLength); |
58 | } |
59 | |
60 | /*! |
61 | Sets the locale of the text record to \a locale. |
62 | */ |
63 | void QNdefNfcTextRecord::setLocale(const QString &locale) |
64 | { |
65 | QByteArray p = payload(); |
66 | |
67 | quint8 status = p.isEmpty() ? 0 : p.at(i: 0); |
68 | |
69 | quint8 codeLength = status & 0x3f; |
70 | |
71 | quint8 newStatus = (status & 0xd0) | locale.size(); |
72 | |
73 | p[0] = newStatus; |
74 | p.replace(index: 1, len: codeLength, s: locale.toLatin1()); |
75 | |
76 | setPayload(p); |
77 | } |
78 | |
79 | /*! |
80 | Returns the contents of the text record as a string. |
81 | */ |
82 | QString QNdefNfcTextRecord::text() const |
83 | { |
84 | const QByteArray p = payload(); |
85 | |
86 | if (p.isEmpty()) |
87 | return QString(); |
88 | |
89 | quint8 status = p.at(i: 0); |
90 | bool utf16 = status & 0x80; |
91 | quint8 codeLength = status & 0x3f; |
92 | |
93 | auto toUnicode = QStringDecoder( |
94 | utf16 ? QStringDecoder::Encoding::Utf16BE : QStringDecoder::Encoding::Utf8, |
95 | QStringDecoder::Flag::Stateless); |
96 | |
97 | return toUnicode(QByteArrayView(p.constData() + 1 + codeLength, p.size() - 1 - codeLength)); |
98 | } |
99 | |
100 | /*! |
101 | Sets the contents of the text record to \a text. |
102 | */ |
103 | void QNdefNfcTextRecord::setText(const QString text) |
104 | { |
105 | if (payload().isEmpty()) |
106 | setLocale(QLocale().name()); |
107 | |
108 | QByteArray p = payload(); |
109 | |
110 | quint8 status = p.at(i: 0); |
111 | |
112 | bool utf16 = status & 0x80; |
113 | quint8 codeLength = status & 0x3f; |
114 | |
115 | p.truncate(pos: 1 + codeLength); |
116 | |
117 | auto fromUnicode = QStringEncoder( |
118 | utf16? QStringEncoder::Encoding::Utf16BE : QStringEncoder::Encoding::Utf8, |
119 | QStringEncoder::Flag::Stateless|QStringEncoder::Flag::WriteBom); |
120 | |
121 | p += fromUnicode(text); |
122 | |
123 | setPayload(p); |
124 | } |
125 | |
126 | /*! |
127 | Returns the encoding of the contents. |
128 | */ |
129 | QNdefNfcTextRecord::Encoding QNdefNfcTextRecord::encoding() const |
130 | { |
131 | if (payload().isEmpty()) |
132 | return Utf8; |
133 | |
134 | QByteArray p = payload(); |
135 | |
136 | quint8 status = p.at(i: 0); |
137 | |
138 | bool utf16 = status & 0x80; |
139 | |
140 | if (utf16) |
141 | return Utf16; |
142 | else |
143 | return Utf8; |
144 | } |
145 | |
146 | /*! |
147 | Sets the enconding of the contents to \a encoding. |
148 | */ |
149 | void QNdefNfcTextRecord::setEncoding(Encoding encoding) |
150 | { |
151 | QByteArray p = payload(); |
152 | |
153 | quint8 status = p.isEmpty() ? 0 : p.at(i: 0); |
154 | |
155 | QString string = text(); |
156 | |
157 | if (encoding == Utf8) |
158 | status &= ~0x80; |
159 | else |
160 | status |= 0x80; |
161 | |
162 | p[0] = status; |
163 | |
164 | setPayload(p); |
165 | |
166 | setText(string); |
167 | } |
168 | |
169 | QT_END_NAMESPACE |
170 |