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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://www.qt.io/licensing. For further information
** use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#ifndef CHANGESET_H
#define CHANGESET_H
#include "utils_global.h"
#include <QString>
#include <QList>
QT_FORWARD_DECLARE_CLASS(QTextCursor)
namespace Utils {
class QTCREATOR_UTILS_EXPORT ChangeSet
{
public:
struct EditOp {
enum Type
{
Unset,
Replace,
Move,
Insert,
Remove,
Flip,
Copy
};
EditOp(): type(Unset), pos1(0), pos2(0), length1(0), length2(0) {}
EditOp(Type t): type(t), pos1(0), pos2(0), length1(0), length2(0) {}
Type type;
int pos1;
int pos2;
int length1;
int length2;
QString text;
};
struct Range {
Range()
: start(0), end(0) {}
Range(int start, int end)
: start(start), end(end) {}
int start;
int end;
};
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();
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);
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;
};
} // namespace Utils
#endif // CHANGESET_H
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