File indexing completed on 2024-04-21 03:51:46 

0001 /*
0002     This file is part of the KDE Baloo project.
0003     SPDX-FileCopyrightText: 2010 Sebastian Trueg <trueg@kde.org>
0004     SPDX-FileCopyrightText: 2014 Vishesh Handa <me@vhanda.in>
0005 
0006     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
0007 */
0008 
0009 #include "regexpcache.h"
0010 #include "baloodebug.h"
0011 
0012 #include <QStringList>
0013 
0014 RegExpCache::RegExpCache()
0015 {
0016 }
0017 
0018 RegExpCache::~RegExpCache()
0019 {
0020 }
0021 
0022 bool RegExpCache::exactMatch(const QString& s) const
0023 {
0024     if (m_exactMatches.contains(s)) {
0025         return true;
0026     }
0027     for (const QRegularExpression& filter : std::as_const(m_regexpCache)) {
0028         if (filter.match(s).hasMatch()) {
0029             return true;
0030         }
0031     }
0032     return false;
0033 }
0034 
0035 void RegExpCache::rebuildCacheFromFilterList(const QStringList& filters)
0036 {
0037     m_regexpCache.clear();
0038     m_exactMatches.clear();
0039 
0040     // RE matching "*.foo" style patterns
0041     QRegularExpression suffixOnlyRe(QStringLiteral("^\\*\\.([^.\\*\\?]+)$"));
0042     QStringList suffixes;
0043 
0044     for (const QString& filter : filters) {
0045         QString f = filter;
0046         if (!f.contains(QLatin1Char('*')) && !f.contains(QLatin1Char('?'))) {
0047             m_exactMatches += f;
0048             continue;
0049         }
0050         auto m = suffixOnlyRe.match(f);
0051         if (m.hasMatch()) {
0052             // qCDebug(BALOO) << "filter is suffix match:" << m;
0053             suffixes += m.captured(1);
0054             continue;
0055         }
0056         f.replace(QLatin1Char('.'), QStringLiteral("\\."));
0057         f.replace(QLatin1Char('?'), QLatin1Char('.'));
0058         f.replace(QStringLiteral("*"), QStringLiteral(".*"));
0059         f = QLatin1String("^") + f + QLatin1String("$");
0060 
0061         m_regexpCache.append(QRegularExpression(f));
0062     }
0063 
0064     // Combine all suffixes into one large RE: "^.*(foo|bar|baz)$"
0065     QString suffixMatch = QStringLiteral("^.*\\.(")
0066         + suffixes.join(QLatin1Char('|'))
0067         + QStringLiteral(")$");
0068     // qCDebug(BALOO) << suffixMatch;
0069     m_regexpCache.prepend(QRegularExpression(suffixMatch));
0070 }