File indexing completed on 2024-10-06 03:39:29

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2022 Nicolas Fella <nicolas.fella@gmx.de>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kfilefilter.h"
 
 #include <QDebug>
 #include <QMetaType>
 #include <QMimeDatabase>
 #include <algorithm>
 #include <qchar.h>
 
 #include "kiocoredebug.h"
 
 class KFileFilterPrivate : public QSharedData
 {
 public:
     KFileFilterPrivate()
     {
     }
 
     KFileFilterPrivate(const KFileFilterPrivate &other)
         : QSharedData(other)
         , m_label(other.m_label)
         , m_filePatterns(other.m_filePatterns)
         , m_mimePatterns(other.m_mimePatterns)
     {
     }
 
     QString m_label;
     QStringList m_filePatterns;
     QStringList m_mimePatterns;
     bool m_isValid = true;
 };
 
 QList<KFileFilter> KFileFilter::fromFilterString(const QString &filterString)
 {
     int pos = filterString.indexOf(QLatin1Char('/'));
 
     // Check for an un-escaped '/', if found
     // interpret as a MIME filter.
 
     if (pos > 0 && filterString[pos - 1] != QLatin1Char('\\')) {
         const QStringList filters = filterString.split(QLatin1Char(' '), Qt::SkipEmptyParts);
 
         QList<KFileFilter> result;
         result.reserve(filters.size());
 
         std::transform(filters.begin(), filters.end(), std::back_inserter(result), [](const QString &mimeType) {
             return KFileFilter::fromMimeType(mimeType);
         });
 
         return result;
     }
 
     // Strip the escape characters from
     // escaped '/' characters.
 
     QString escapeRemoved(filterString);
     for (pos = 0; (pos = escapeRemoved.indexOf(QLatin1String("\\/"), pos)) != -1; ++pos) {
         escapeRemoved.remove(pos, 1);
     }
 
     const QStringList filters = escapeRemoved.split(QLatin1Char('\n'), Qt::SkipEmptyParts);
 
     QList<KFileFilter> result;
 
     for (const QString &filter : filters) {
         int separatorPos = filter.indexOf(QLatin1Char('|'));
 
         QString label;
         QStringList patterns;
 
         if (separatorPos != -1) {
             label = filter.mid(separatorPos + 1);
             patterns = filter.left(separatorPos).split(QLatin1Char(' '));
         } else {
             patterns = filter.split(QLatin1Char(' '));
             label = patterns.join(QLatin1Char(' '));
         }
 
         result << KFileFilter(label, patterns, {});
     }
 
     return result;
 }
 
 KFileFilter::KFileFilter()
     : d(new KFileFilterPrivate)
 {
 }
 
 KFileFilter::KFileFilter(const QString &label, const QStringList &filePatterns, const QStringList &mimePatterns)
     : d(new KFileFilterPrivate)
 {
     d->m_filePatterns = filePatterns;
     d->m_mimePatterns = mimePatterns;
     d->m_label = label;
 }
 
 KFileFilter::~KFileFilter() = default;
 
 KFileFilter::KFileFilter(const KFileFilter &other)
     : d(other.d)
 {
 }
 
 KFileFilter &KFileFilter::operator=(const KFileFilter &other)
 {
     if (this != &other) {
         d = other.d;
     }
 
     return *this;
 }
 
 QString KFileFilter::label() const
 {
     return d->m_label;
 }
 
 QStringList KFileFilter::filePatterns() const
 {
     return d->m_filePatterns;
 }
 
 QStringList KFileFilter::mimePatterns() const
 {
     return d->m_mimePatterns;
 }
 
 bool KFileFilter::operator==(const KFileFilter &other) const
 {
     return d->m_label == other.d->m_label && d->m_filePatterns == other.d->m_filePatterns && d->m_mimePatterns == other.d->m_mimePatterns;
 }
 
 bool KFileFilter::isEmpty() const
 {
     return d->m_filePatterns.isEmpty() && d->m_mimePatterns.isEmpty();
 }
 
 bool KFileFilter::isValid() const
 {
     return d->m_isValid;
 }
 
 QString KFileFilter::toFilterString() const
 {
     if (!d->m_filePatterns.isEmpty() && !d->m_mimePatterns.isEmpty()) {
         qCWarning(KIO_CORE) << "KFileFilters with both mime and file patterns cannot be converted to filter strings";
         return QString();
     }
 
     if (!d->m_mimePatterns.isEmpty()) {
         return d->m_mimePatterns.join(QLatin1Char(' '));
     }
 
     if (!d->m_label.isEmpty()) {
         const QString patterns = d->m_filePatterns.join(QLatin1Char(' '));
         const QString escapedLabel = QString(d->m_label).replace(QLatin1String("/"), QLatin1String("\\/"));
 
         if (patterns != d->m_label) {
             return patterns + QLatin1Char('|') + escapedLabel;
         } else {
             return patterns;
         }
     } else {
         return d->m_filePatterns.join(QLatin1Char(' '));
     }
 }
 
 KFileFilter KFileFilter::fromMimeType(const QString &mimeType)
 {
     if (mimeType.isEmpty()) {
         qCWarning(KIO_CORE) << "KFileFilter::fromMimeType() called with empty input";
 
         KFileFilter filter;
         filter.d->m_isValid = false;
         return filter;
     }
 
     static QMimeDatabase db;
     const QMimeType type = db.mimeTypeForName(mimeType);
 
     if (type.isValid()) {
         KFileFilter filter(type.comment(), {}, {mimeType});
         return filter;
     } else {
         qCWarning(KIO_CORE) << "KFileFilter::fromMimeType() called with unknown MIME type" << mimeType;
 
         KFileFilter filter;
         filter.d->m_isValid = false;
         return filter;
     }
 }
 
 QList<KFileFilter> KFileFilter::fromMimeTypes(const QStringList &mimeTypes)
 {
     QList<KFileFilter> ret;
     ret.reserve(mimeTypes.size());
     for (const QString &type : mimeTypes) {
         ret << KFileFilter::fromMimeType(type);
     }
     return ret;
 }
 
 QDebug operator<<(QDebug dbg, const KFileFilter &filter)
 {
     dbg << "KFileFilter(";
 
     dbg << "MIME patterns: " << filter.mimePatterns();
     dbg << " ";
     dbg << "File patterns: " << filter.filePatterns();
     dbg << " ";
     dbg << "label: " << filter.label();
 
     dbg << ")";
     return dbg;
 }
 
 Q_DECLARE_METATYPE(KFileFilter);