1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
// SPDX-FileCopyrightText: 2018 Kitsune Ral <kitsune-ral@users.sf.net>
// SPDX-FileCopyrightText: 2019 Alexey Andreyev <aa13q@ya.ru>
// SPDX-License-Identifier: LGPL-2.1-or-later
#include "util.h"
#include <QtCore/QCryptographicHash>
#include <QtCore/QDataStream>
#include <QtCore/QDir>
#include <QtCore/QRegularExpression>
#include <QtCore/QStandardPaths>
#include <QtCore/QStringBuilder>
#include <QtCore/QtEndian>
static const auto RegExpOptions =
QRegularExpression::CaseInsensitiveOption
| QRegularExpression::UseUnicodePropertiesOption;
// Converts all that looks like a URL into HTML links
void Quotient::linkifyUrls(QString& htmlEscapedText)
{
// Note: outer parentheses are a part of C++ raw string delimiters, not of
// the regex (see http://en.cppreference.com/w/cpp/language/string_literal).
// Note2: the next-outer parentheses are \N in the replacement.
// generic url:
// regexp is originally taken from Konsole (https://github.com/KDE/konsole)
// protocolname:// or www. followed by anything other than whitespaces,
// <, >, ' or ", and ends before whitespaces, <, >, ', ", ], !, ), :,
// comma or dot
static const QRegularExpression FullUrlRegExp(
QStringLiteral(
R"(\b((www\.(?!\.)(?!(\w|\.|-)+@)|(https?|ftp):(//)?\w|(magnet|matrix):)(&(?![lg]t;)|[^&\s<>'"])+(&(?![lg]t;)|[^&!,.\s<>'"\]):])))"),
RegExpOptions);
// email address:
// [word chars, dots or dashes]@[word chars, dots or dashes].[word chars]
static const QRegularExpression EmailAddressRegExp(
QStringLiteral(R"(\b(mailto:)?((\w|\.|-)+@(\w|\.|-)+\.\w+\b))"),
RegExpOptions);
// An interim liberal implementation of
// https://matrix.org/docs/spec/appendices.html#identifier-grammar
static const QRegularExpression MxIdRegExp(
QStringLiteral(
R"((^|[][[:space:](){}`'";])([!#@][-a-z0-9_=#/.]{1,252}:\w(?:\w|\.|-)*\.\w+(?::\d{1,5})?))"),
RegExpOptions);
Q_ASSERT(FullUrlRegExp.isValid() && EmailAddressRegExp.isValid()
&& MxIdRegExp.isValid());
// NOTE: htmlEscapedText is already HTML-escaped! No literal <,>,&,"
htmlEscapedText.replace(EmailAddressRegExp,
QStringLiteral(R"(<a href="mailto:\2">\1\2</a>)"));
htmlEscapedText.replace(FullUrlRegExp,
QStringLiteral(R"(<a href="\1">\1</a>)"));
htmlEscapedText.replace(
MxIdRegExp,
QStringLiteral(R"(\1<a href="https://matrix.to/#/\2">\2</a>)"));
}
QString Quotient::sanitized(const QString& plainText)
{
auto text = plainText;
text.remove(QChar(0x202e)); // RLO
text.remove(QChar(0x202d)); // LRO
text.remove(QChar(0xfffc)); // Object replacement character
return text;
}
QString Quotient::prettyPrint(const QString& plainText)
{
auto pt = plainText.toHtmlEscaped();
linkifyUrls(pt);
pt.replace('\n', QStringLiteral("<br/>"));
return QStringLiteral("<span style='white-space:pre-wrap'>") + pt
+ QStringLiteral("</span>");
}
QString Quotient::cacheLocation(const QString& dirName)
{
const QString cachePath =
QStandardPaths::writableLocation(QStandardPaths::CacheLocation) % '/'
% dirName % '/';
QDir dir;
if (!dir.exists(cachePath))
dir.mkpath(cachePath);
return cachePath;
}
qreal Quotient::stringToHueF(const QString& s)
{
Q_ASSERT(!s.isEmpty());
QByteArray hash = QCryptographicHash::hash(s.toUtf8(),
QCryptographicHash::Sha1);
QDataStream dataStream(hash.left(2));
dataStream.setByteOrder(QDataStream::LittleEndian);
quint16 hashValue;
dataStream >> hashValue;
const auto hueF = qreal(hashValue) / std::numeric_limits<quint16>::max();
Q_ASSERT((0 <= hueF) && (hueF <= 1));
return hueF;
}
static const auto ServerPartRegEx = QStringLiteral(
"(\\[[^][:space:]]+]|[-[:alnum:].]+)" // IPv6 address or hostname/IPv4 address
"(?::(\\d{1,5}))?" // Optional port
);
QString Quotient::serverPart(const QString& mxId)
{
static QString re = "^[@!#$+].*?:(" // Localpart and colon
% ServerPartRegEx % ")$";
static QRegularExpression parser(
re,
QRegularExpression::UseUnicodePropertiesOption); // Because Asian digits
Q_ASSERT(parser.isValid());
return parser.match(mxId).captured(1);
}
QString Quotient::versionString()
{
return QStringLiteral(Quotient_VERSION_STRING);
}
int Quotient::majorVersion()
{
return Quotient_VERSION_MAJOR;
}
int Quotient::minorVersion()
{
return Quotient_VERSION_MINOR;
}
int Quotient::patchVersion()
{
return Quotient_VERSION_PATCH;
}
|
