patternlist.cpp

//------------------------------------------------------------------------------
// patternlist.cpp
//------------------------------------------------------------------------------
//
// 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
//
//------------------------------------------------------------------------------
// Copyright (C) 2014 "Zalewa" <zalewapl@gmail.com>
//------------------------------------------------------------------------------
#include "patternlist.h"

#include "log.h"
#include <QDataStream>
#include <QDebug>
#include <QIODevice>

bool PatternList::isExactMatchAny(const QString &candidate) const
{
        for (const auto &matcher : *this)
        {
                auto match = matcher.match(candidate, 0, QRegularExpression::NormalMatch, QRegularExpression::AnchoredMatchOption);
                if (match.hasMatch() && match.capturedLength(0) == candidate.length())
                {
                        return true;
                }
        }
        return false;
}

PatternList PatternList::deserializeQVariant(const QVariant &var)
{
        PatternList result;
        for (const QVariant &element : var.toList())
        {
                if (element.canConvert<Pattern>())
                {
                        result << element.value<Pattern>();
                }
                else if (element.canConvert<QRegularExpression>())
                {
                        // Should never be reached, but if it is this is better than losing the pattern entirely
                        result << element.toRegularExpression();
                }
                else
                {
                        // Qt6 technically has QRegExp as part of QtCore5Compat module, but
                        // it would be silly to bring in the whole library for one type so
                        // lets read the old setting raw. We could of course use QRegExp on
                        // Qt5 builds, but why maintain two branches?

                        QByteArray rawData;
                        {
                                QDataStream stream(&rawData, QIODevice::WriteOnly);
                                // This is the version that QSettings uses so probably good enough for us to keep things simple
                                stream.setVersion(QDataStream::Qt_4_0);
                                stream << element;
                        }

                        QDataStream stream(&rawData, QIODevice::ReadOnly);
                        stream.setVersion(QDataStream::Qt_4_0);

                        constexpr quint32 REGEXP_TYPE = 27;
                        quint32 type = 0;
                        stream >> type;
                        if (stream.status() != QDataStream::Ok)
                        {
                                qDebug() << "Attempt to migrate QRegExp could not read variant type";
                                continue;
                        }
                        if (type != REGEXP_TYPE)
                        {
                                qDebug() << "Attempt to migrate QRegExp encounter unexpected type:" << type;
                                continue;
                        }

                        constexpr quint8 REGEXP_SYNTAX_WILDCARD = 1;

                        QString regex;
                        quint8 caseSensitivity = 0;
                        quint8 syntax = 0;
                        quint8 minimal = 0;
                        stream >> regex >> caseSensitivity >> syntax >> minimal;
                        if (stream.status() != QDataStream::Ok)
                        {
                                qDebug() << "Attempt to migrate QRegExp could not read contents";
                                continue;
                        }

                        result << Pattern(regex, caseSensitivity == Qt::CaseSensitive ? QRegularExpression::NoPatternOption : QRegularExpression::CaseInsensitiveOption, syntax == REGEXP_SYNTAX_WILDCARD ? Pattern::Wildcard : Pattern::RegExp);
                }
        }
        return result;
}

QVariant PatternList::serializeQVariant() const
{
        QVariantList var;
        for (const auto &pattern : *this)
        {
                var << QVariant::fromValue(pattern);
        }
        return var;
}