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/******************************************************************************
* Copyright (C) 2018 Kitsune Ral <kitsune-ral@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "util.h"
#include <QtCore/QRegularExpression>
#include <QtCore/QStandardPaths>
#include <QtCore/QDir>
#include <QtCore/QStringBuilder>
#include <QtCore/QCryptographicHash>
#include <QtCore/QtEndian>
#include <QtCore/QDataStream>
static const auto RegExpOptions =
QRegularExpression::CaseInsensitiveOption
| QRegularExpression::OptimizeOnFirstUsageOption
| QRegularExpression::UseUnicodePropertiesOption;
// Converts all that looks like a URL into HTML links
void QMatrixClient::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|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"((^|[^<>/])([!#@][-a-z0-9_=/.]{1,252}:(?:\w|\.|-)+\.\w+(?::\d{1,5})?))"
), RegExpOptions);
// 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 QMatrixClient::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 QMatrixClient::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 QMatrixClient::cacheLocation(const QString& dirName)
{
const QString cachePath =
QStandardPaths::writableLocation(QStandardPaths::CacheLocation)
% '/' % dirName % '/';
QDir dir;
if (!dir.exists(cachePath))
dir.mkpath(cachePath);
return cachePath;
}
qreal QMatrixClient::stringToHueF(const QString &string)
{
Q_ASSERT(!string.isEmpty());
QByteArray hash = QCryptographicHash::hash(string.toUtf8(),
QCryptographicHash::Sha1);
QDataStream dataStream(qToLittleEndian(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;
}
// Tests for function_traits<>
#ifdef Q_CC_CLANG
#pragma clang diagnostic push
#pragma ide diagnostic ignored "OCSimplifyInspection"
#endif
using namespace QMatrixClient;
int f();
static_assert(std::is_same<fn_return_t<decltype(f)>, int>::value,
"Test fn_return_t<>");
void f1(int);
static_assert(function_traits<decltype(f1)>::arg_number == 1,
"Test fn_arg_number");
void f2(int, QString);
static_assert(std::is_same<fn_arg_t<decltype(f2), 1>, QString>::value,
"Test fn_arg_t<>");
struct S { int mf(); };
static_assert(is_callable_v<decltype(&S::mf)>, "Test member function");
static_assert(returns<int, decltype(&S::mf)>(), "Test returns<> with member function");
struct Fo { int operator()(); };
static_assert(is_callable_v<Fo>, "Test is_callable<> with function object");
static_assert(function_traits<Fo>::arg_number == 0, "Test function object");
static_assert(std::is_same<fn_return_t<Fo>, int>::value,
"Test return type of function object");
struct Fo1 { void operator()(int); };
static_assert(function_traits<Fo1>::arg_number == 1, "Test function object 1");
static_assert(is_callable_v<Fo1>, "Test is_callable<> with function object 1");
static_assert(std::is_same<fn_arg_t<Fo1>, int>(),
"Test fn_arg_t defaulting to first argument");
#if (!defined(_MSC_VER) || _MSC_VER >= 1910)
static auto l = [] { return 1; };
static_assert(is_callable_v<decltype(l)>, "Test is_callable_v<> with lambda");
static_assert(std::is_same<fn_return_t<decltype(l)>, int>::value,
"Test fn_return_t<> with lambda");
#endif
template <typename T>
struct fn_object
{
static int smf(double) { return 0; }
};
template <>
struct fn_object<QString>
{
void operator()(QString);
};
static_assert(is_callable_v<fn_object<QString>>, "Test function object");
static_assert(returns<void, fn_object<QString>>(),
"Test returns<> with function object");
static_assert(!is_callable_v<fn_object<int>>, "Test non-function object");
// FIXME: These two don't work
//static_assert(is_callable_v<decltype(&fn_object<int>::smf)>,
// "Test static member function");
//static_assert(returns<int, decltype(&fn_object<int>::smf)>(),
// "Test returns<> with static member function");
template <typename T>
QString ft(T&&) { return {}; }
static_assert(std::is_same<fn_arg_t<decltype(ft<QString>)>, QString&&>(),
"Test function templates");
#ifdef Q_CC_CLANG
#pragma clang diagnostic pop
#endif
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