qt-everywhere-src-5.14.1/qtbase/src/corelib/text/qtextboundaryfinder.h

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#ifndef QTEXTBOUNDARYFINDER_H
#define QTEXTBOUNDARYFINDER_H

#include <QtCore/qchar.h>
#include <QtCore/qstring.h>

QT_BEGIN_NAMESPACE


class QTextBoundaryFinderPrivate;

class Q_CORE_EXPORT QTextBoundaryFinder
{
public:
    QTextBoundaryFinder();
    QTextBoundaryFinder(const QTextBoundaryFinder &other);
    QTextBoundaryFinder &operator=(const QTextBoundaryFinder &other);
    ~QTextBoundaryFinder();

    enum BoundaryType {
        Grapheme,
        Word,
        Sentence,
        Line
    };

    enum BoundaryReason {
        NotAtBoundary = 0,
        BreakOpportunity = 0x1f,
        StartOfItem = 0x20,
        EndOfItem = 0x40,
        MandatoryBreak = 0x80,
        SoftHyphen = 0x100
    };
    Q_DECLARE_FLAGS( BoundaryReasons, BoundaryReason )

    QTextBoundaryFinder(BoundaryType type, const QString &string);
    QTextBoundaryFinder(BoundaryType type, const QChar *chars, int length, unsigned char *buffer = nullptr, int bufferSize = 0);

    inline bool isValid() const { return d; }

    inline BoundaryType type() const { return t; }
    QString string() const;

    void toStart();
    void toEnd();
    int position() const;
    void setPosition(int position);

    int toNextBoundary();
    int toPreviousBoundary();

    bool isAtBoundary() const;
    BoundaryReasons boundaryReasons() const;

private:
    BoundaryType t;
    QString s;
    const QChar *chars;
    int length;
    int pos;
    uint freePrivate : 1;
    uint unused : 31;
    QTextBoundaryFinderPrivate *d;
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QTextBoundaryFinder::BoundaryReasons)

QT_END_NAMESPACE

#endif