qt-creator/src/libs/utils/changeset.h

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#ifndef CHANGESET_H
#define CHANGESET_H

#include "utils_global.h"

#include <QtCore/QString>
#include <QtCore/QList>
#include <QtGui/QTextCursor>

namespace Utils {

class QTCREATOR_UTILS_EXPORT ChangeSet
{
public:
    struct Replace {
        Replace(): pos(0), length(0) {}

        int pos;
        int length;
        QString replacement;
    };

    struct Move {
        Move(): pos(0), length(0), to(0) {}

        int pos;
        int length;
        int to;
    };

public:
    ChangeSet();

    bool isEmpty() const;

    QList<Replace> replaceList() const;
    QList<Move> moveList() const; // ### TODO: merge with replaceList

    void clear();

    void replace(int pos, int length, const QString &replacement);
    void move(int pos, int length, int to);

    void write(QString *s);
    void write(QTextCursor *textCursor);

private:
    bool hasOverlap(int pos, int length);
    bool hasMoveInto(int pos, int length);

    void doReplace(const Replace &replace);
    void doMove(const Move &move);

    void write_helper();

private:
    QString *m_string;
    QTextCursor *m_cursor;
    QList<Replace> m_replaceList;
    QList<Move> m_moveList;
};

} // namespace Utils

#endif // CHANGESET_H