1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/****************************************************************************
**
** 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://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: 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 DIFFER_H
#define DIFFER_H
#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
#endif // DIFF_H
|
