qt-everywhere-src-5.14.1/qtbase/src/corelib/mimetypes/qmimetypeparser_p.h

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#ifndef QMIMETYPEPARSER_P_H
#define QMIMETYPEPARSER_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 "qmimeprovider_p.h"

QT_BEGIN_NAMESPACE

class QIODevice;

class QMimeTypeParserBase
{
    Q_DISABLE_COPY_MOVE(QMimeTypeParserBase)

public:
    QMimeTypeParserBase() {}
    virtual ~QMimeTypeParserBase() {}

    bool parse(QIODevice *dev, const QString &fileName, QString *errorMessage);

    static bool parseNumber(const QStringRef &n, int *target, QString *errorMessage);

protected:
    virtual bool process(const QMimeType &t, QString *errorMessage) = 0;
    virtual bool process(const QMimeGlobPattern &t, QString *errorMessage) = 0;
    virtual void processParent(const QString &child, const QString &parent) = 0;
    virtual void processAlias(const QString &alias, const QString &name) = 0;
    virtual void processMagicMatcher(const QMimeMagicRuleMatcher &matcher) = 0;

private:
    enum ParseState {
        ParseBeginning,
        ParseMimeInfo,
        ParseMimeType,
        ParseComment,
        ParseGenericIcon,
        ParseIcon,
        ParseGlobPattern,
        ParseSubClass,
        ParseAlias,
        ParseMagic,
        ParseMagicMatchRule,
        ParseOtherMimeTypeSubTag,
        ParseError
    };

    static ParseState nextState(ParseState currentState, const QStringRef &startElement);
};


class QMimeTypeParser : public QMimeTypeParserBase
{
public:
    explicit QMimeTypeParser(QMimeXMLProvider &provider) : m_provider(provider) {}

protected:
    inline bool process(const QMimeType &t, QString *) override
    { m_provider.addMimeType(t); return true; }

    inline bool process(const QMimeGlobPattern &glob, QString *) override
    { m_provider.addGlobPattern(glob); return true; }

    inline void processParent(const QString &child, const QString &parent) override
    { m_provider.addParent(child, parent); }

    inline void processAlias(const QString &alias, const QString &name) override
    { m_provider.addAlias(alias, name); }

    inline void processMagicMatcher(const QMimeMagicRuleMatcher &matcher) override
    { m_provider.addMagicMatcher(matcher); }

private:
    QMimeXMLProvider &m_provider;
};

QT_END_NAMESPACE

#endif // MIMETYPEPARSER_P_H