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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#pragma once
#include "utils_global.h"
#include <QString>
#include <QList>
QT_BEGIN_NAMESPACE
class QTextCursor;
QT_END_NAMESPACE
namespace Utils {
class QTCREATOR_UTILS_EXPORT ChangeSet
{
public:
struct EditOp {
enum Type
{
Unset,
Replace,
Move,
Insert,
Remove,
Flip,
Copy
};
EditOp() = default;
EditOp(Type t): type(t) {}
Type type = Unset;
int pos1 = 0;
int pos2 = 0;
int length1 = 0;
int length2 = 0;
QString text;
};
struct Range {
Range() = default;
Range(int start, int end)
: start(start), end(end) {}
int start = 0;
int end = 0;
};
public:
ChangeSet();
ChangeSet(const QList<EditOp> &operations);
bool isEmpty() const;
QList<EditOp> operationList() const;
void clear();
bool replace(const Range &range, const QString &replacement);
bool remove(const Range &range);
bool move(const Range &range, int to);
bool flip(const Range &range1, const Range &range2);
bool copy(const Range &range, int to);
bool replace(int start, int end, const QString &replacement);
bool remove(int start, int end);
bool move(int start, int end, int to);
bool flip(int start1, int end1, int start2, int end2);
bool copy(int start, int end, int to);
bool insert(int pos, const QString &text);
bool hadErrors() const;
void apply(QString *s);
void apply(QTextCursor *textCursor);
private:
// length-based API.
bool replace_helper(int pos, int length, const QString &replacement);
bool move_helper(int pos, int length, int to);
bool remove_helper(int pos, int length);
bool flip_helper(int pos1, int length1, int pos2, int length2);
bool copy_helper(int pos, int length, int to);
bool hasOverlap(int pos, int length) const;
QString textAt(int pos, int length);
void doReplace(const EditOp &replace, QList<EditOp> *replaceList);
void convertToReplace(const EditOp &op, QList<EditOp> *replaceList);
void apply_helper();
private:
QString *m_string;
QTextCursor *m_cursor;
QList<EditOp> m_operationList;
bool m_error;
};
inline bool operator<(const ChangeSet::Range &r1, const ChangeSet::Range &r2)
{
return r1.start < r2.start;
}
} // namespace Utils
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