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// Copyright (C) 2016 The Qt Company Ltd.
// Copyright (C) 2015 Klaralvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author David Faure <david.faure@kdab.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QMIMEPROVIDER_P_H
#define QMIMEPROVIDER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qmimedatabase_p.h"
QT_REQUIRE_CONFIG(mimetype);
#include "qmimeglobpattern_p.h"
#include <QtCore/qdatetime.h>
#include <QtCore/qset.h>
#include <QtCore/qmap.h>
QT_BEGIN_NAMESPACE
class QMimeMagicRuleMatcher;
class QMimeProviderBase
{
Q_DISABLE_COPY(QMimeProviderBase)
public:
QMimeProviderBase(QMimeDatabasePrivate *db, const QString &directory);
virtual ~QMimeProviderBase() {}
virtual bool isValid() = 0;
virtual bool isInternalDatabase() const = 0;
virtual QMimeType mimeTypeForName(const QString &name) = 0;
virtual void addFileNameMatches(const QString &fileName, QMimeGlobMatchResult &result) = 0;
virtual void addParents(const QString &mime, QStringList &result) = 0;
virtual QString resolveAlias(const QString &name) = 0;
virtual void addAliases(const QString &name, QStringList &result) = 0;
virtual void findByMagic(const QByteArray &data, int *accuracyPtr, QMimeType &candidate) = 0;
virtual void addAllMimeTypes(QList<QMimeType> &result) = 0;
virtual bool loadMimeTypePrivate(QMimeTypePrivate &) { return false; }
virtual void loadIcon(QMimeTypePrivate &) {}
virtual void loadGenericIcon(QMimeTypePrivate &) {}
virtual void ensureLoaded() {}
virtual void excludeMimeTypeGlobs(const QStringList &) {}
QString directory() const { return m_directory; }
QMimeDatabasePrivate *m_db;
QString m_directory;
/*
MimeTypes with "glob-deleteall" tags are handled differently by each provider
sub-class:
- QMimeBinaryProvider parses glob-deleteall tags lazily, i.e. only when loadMimeTypePrivate()
is called, and clears the glob patterns associated with mimetypes that have this tag
- QMimeXMLProvider parses glob-deleteall from the the start, i.e. when a XML file is
parsed with QMimeTypeParser
The two lists below are used to let both provider types (XML and Binary) communicate
about mimetypes with glob-deleteall.
*/
/*
List of mimetypes in _this_ Provider that have a "glob-deleteall" tag,
glob patterns for those mimetypes should be ignored in all _other_ lower
precedence Providers.
*/
QStringList m_mimeTypesWithDeletedGlobs;
/*
List of mimetypes with glob patterns that are "overwritten" in _this_ Provider,
by a "glob-deleteall" tag in a mimetype definition in a _higher precedence_
Provider. With QMimeBinaryProvider, we can't change the data in the binary mmap'ed
file, hence the need for this list.
*/
QStringList m_mimeTypesWithExcludedGlobs;
};
/*
Parses the files 'mime.cache' and 'types' on demand
*/
class QMimeBinaryProvider final : public QMimeProviderBase
{
public:
QMimeBinaryProvider(QMimeDatabasePrivate *db, const QString &directory);
virtual ~QMimeBinaryProvider();
bool isValid() override;
bool isInternalDatabase() const override;
QMimeType mimeTypeForName(const QString &name) override;
void addFileNameMatches(const QString &fileName, QMimeGlobMatchResult &result) override;
void addParents(const QString &mime, QStringList &result) override;
QString resolveAlias(const QString &name) override;
void addAliases(const QString &name, QStringList &result) override;
void findByMagic(const QByteArray &data, int *accuracyPtr, QMimeType &candidate) override;
void addAllMimeTypes(QList<QMimeType> &result) override;
bool loadMimeTypePrivate(QMimeTypePrivate &) override;
void loadIcon(QMimeTypePrivate &) override;
void loadGenericIcon(QMimeTypePrivate &) override;
void ensureLoaded() override;
void excludeMimeTypeGlobs(const QStringList &toExclude) override;
private:
struct CacheFile;
void matchGlobList(QMimeGlobMatchResult &result, CacheFile *cacheFile, int offset, const QString &fileName);
bool matchSuffixTree(QMimeGlobMatchResult &result, CacheFile *cacheFile, int numEntries,
int firstOffset, const QString &fileName, qsizetype charPos,
bool caseSensitiveCheck);
bool matchMagicRule(CacheFile *cacheFile, int numMatchlets, int firstOffset, const QByteArray &data);
bool isMimeTypeGlobsExcluded(const char *name);
QLatin1StringView iconForMime(CacheFile *cacheFile, int posListOffset, const QByteArray &inputMime);
void loadMimeTypeList();
bool checkCacheChanged();
std::unique_ptr<CacheFile> m_cacheFile;
QStringList m_cacheFileNames;
QSet<QString> m_mimetypeNames;
bool m_mimetypeListLoaded;
struct MimeTypeExtra
{
// Both retrieved on demand in loadMimeTypePrivate
QHash<QString, QString> localeComments;
QStringList globPatterns;
};
QMap<QString, MimeTypeExtra> m_mimetypeExtra;
};
/*
Parses the raw XML files (slower)
*/
class QMimeXMLProvider final : public QMimeProviderBase
{
public:
enum InternalDatabaseEnum { InternalDatabase };
#if QT_CONFIG(mimetype_database)
enum : bool { InternalDatabaseAvailable = true };
#else
enum : bool { InternalDatabaseAvailable = false };
#endif
QMimeXMLProvider(QMimeDatabasePrivate *db, InternalDatabaseEnum);
QMimeXMLProvider(QMimeDatabasePrivate *db, const QString &directory);
~QMimeXMLProvider();
bool isValid() override;
bool isInternalDatabase() const override;
QMimeType mimeTypeForName(const QString &name) override;
void addFileNameMatches(const QString &fileName, QMimeGlobMatchResult &result) override;
void addParents(const QString &mime, QStringList &result) override;
QString resolveAlias(const QString &name) override;
void addAliases(const QString &name, QStringList &result) override;
void findByMagic(const QByteArray &data, int *accuracyPtr, QMimeType &candidate) override;
void addAllMimeTypes(QList<QMimeType> &result) override;
void ensureLoaded() override;
bool load(const QString &fileName, QString *errorMessage);
// Called by the mimetype xml parser
void addMimeType(const QMimeType &mt);
void excludeMimeTypeGlobs(const QStringList &toExclude) override;
void addGlobPattern(const QMimeGlobPattern &glob);
void addParent(const QString &child, const QString &parent);
void addAlias(const QString &alias, const QString &name);
void addMagicMatcher(const QMimeMagicRuleMatcher &matcher);
private:
void load(const QString &fileName);
void load(const char *data, qsizetype len);
typedef QHash<QString, QMimeType> NameMimeTypeMap;
NameMimeTypeMap m_nameMimeTypeMap;
typedef QHash<QString, QString> AliasHash;
AliasHash m_aliases;
typedef QHash<QString, QStringList> ParentsHash;
ParentsHash m_parents;
QMimeAllGlobPatterns m_mimeTypeGlobs;
QList<QMimeMagicRuleMatcher> m_magicMatchers;
QStringList m_allFiles;
};
QT_END_NAMESPACE
#endif // QMIMEPROVIDER_P_H
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