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/***************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Qt Software Information (qt-info@nokia.com)
**
**
** Non-Open Source Usage
**
** Licensees may use this file in accordance with the Qt Beta Version
** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
** agreement between you and Nokia.
**
** GNU General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
** of this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
**
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt GPL Exception
** version 1.2, included in the file GPL_EXCEPTION.txt in this package.
**
***************************************************************************/
***************************************************************************/
#include "diffhighlighter.h"
#include <QtCore/QDebug>
#include <QtCore/QtAlgorithms>
#include <QtCore/QRegExp>
namespace VCSBase {
// Formats used by DiffHighlighter
enum DiffFormats {
DiffTextFormat,
DiffInFormat,
DiffOutFormat,
DiffFileFormat,
DiffLocationFormat,
NumDiffFormats
};
// --- DiffHighlighterPrivate
struct DiffHighlighterPrivate {
DiffHighlighterPrivate(const QRegExp &filePattern);
inline DiffFormats analyzeLine(const QString &block) const;
const QRegExp m_filePattern;
const QString m_locationIndicator;
const QChar m_diffInIndicator;
const QChar m_diffOutIndicator;
QTextCharFormat m_formats[NumDiffFormats];
};
DiffHighlighterPrivate::DiffHighlighterPrivate(const QRegExp &filePattern) :
m_filePattern(filePattern),
m_locationIndicator(QLatin1String("@@")),
m_diffInIndicator(QLatin1Char('+')),
m_diffOutIndicator(QLatin1Char('-'))
{
Q_ASSERT(filePattern.isValid());
}
DiffFormats DiffHighlighterPrivate::analyzeLine(const QString &text) const
{
// Do not match on git "--- a/" as a deleted line, check
// file first
if (m_filePattern.exactMatch(text))
return DiffFileFormat;
if (text.startsWith(m_diffInIndicator))
return DiffInFormat;
if (text.startsWith(m_diffOutIndicator))
return DiffOutFormat;
if (text.startsWith(m_locationIndicator))
return DiffLocationFormat;
return DiffTextFormat;
}
// --- DiffHighlighter
DiffHighlighter::DiffHighlighter(const QRegExp &filePattern,
QTextDocument *document) :
QSyntaxHighlighter(document),
m_d(new DiffHighlighterPrivate(filePattern))
{
}
DiffHighlighter::~DiffHighlighter()
{
delete m_d;
}
void DiffHighlighter::highlightBlock(const QString &text)
{
if (text.isEmpty())
return;
const DiffFormats format = m_d->analyzeLine(text);
if (format != DiffTextFormat)
setFormat(0, text.length(), m_d->m_formats[format]);
}
void DiffHighlighter::setFormats(const QVector<QTextCharFormat> &s)
{
if (s.size() == NumDiffFormats) {
qCopy(s.constBegin(), s.constEnd(), m_d->m_formats);
} else {
qWarning("%s: insufficient setting size: %d", Q_FUNC_INFO, s.size());
}
}
} // namespace VCSBase
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