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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#pragma once
#include "diffeditor_global.h"
#include <QString>
QT_BEGIN_NAMESPACE
template <class K, class T>
class QMap;
QT_END_NAMESPACE
namespace DiffEditor {
class DIFFEDITOR_EXPORT Diff
{
public:
enum Command {
Delete,
Insert,
Equal
};
Command command;
QString text;
Diff(Command com, const QString &txt = QString());
Diff();
bool operator==(const Diff &other) const;
bool operator!=(const Diff &other) const;
QString toString() const;
static QString commandString(Command com);
};
class DIFFEDITOR_EXPORT Differ
{
public:
enum DiffMode
{
CharMode,
WordMode,
LineMode
};
Differ();
QList<Diff> diff(const QString &text1, const QString &text2);
QList<Diff> unifiedDiff(const QString &text1, const QString &text2);
void setDiffMode(DiffMode mode);
DiffMode diffMode() const;
static QList<Diff> merge(const QList<Diff> &diffList);
static QList<Diff> cleanupSemantics(const QList<Diff> &diffList);
static QList<Diff> cleanupSemanticsLossless(const QList<Diff> &diffList);
static void splitDiffList(const QList<Diff> &diffList,
QList<Diff> *leftDiffList,
QList<Diff> *rightDiffList);
static QList<Diff> moveWhitespaceIntoEqualities(const QList<Diff> &input);
static void diffWithWhitespaceReduced(const QString &leftInput,
const QString &rightInput,
QList<Diff> *leftOutput,
QList<Diff> *rightOutput);
static void unifiedDiffWithWhitespaceReduced(const QString &leftInput,
const QString &rightInput,
QList<Diff> *leftOutput,
QList<Diff> *rightOutput);
static void ignoreWhitespaceBetweenEqualities(const QList<Diff> &leftInput,
const QList<Diff> &rightInput,
QList<Diff> *leftOutput,
QList<Diff> *rightOutput);
static void diffBetweenEqualities(const QList<Diff> &leftInput,
const QList<Diff> &rightInput,
QList<Diff> *leftOutput,
QList<Diff> *rightOutput);
private:
QList<Diff> preprocess1AndDiff(const QString &text1, const QString &text2);
QList<Diff> preprocess2AndDiff(const QString &text1, const QString &text2);
QList<Diff> diffMyers(const QString &text1, const QString &text2);
QList<Diff> diffMyersSplit(const QString &text1, int x,
const QString &text2, int y);
QList<Diff> diffNonCharMode(const QString &text1, const QString &text2);
QStringList encode(const QString &text1,
const QString &text2,
QString *encodedText1,
QString *encodedText2);
QString encode(const QString &text,
QStringList *lines,
QMap<QString, int> *lineToCode);
int findSubtextEnd(const QString &text,
int subTextStart);
DiffMode m_diffMode;
DiffMode m_currentDiffMode;
};
} // namespace DiffEditor
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