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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/
#include "diffhighlighter.h"
#include <utils/qtcassert.h>
#include <QtCore/QDebug>
#include <QtCore/QtAlgorithms>
#include <QtCore/QRegExp>
#include <QtGui/QBrush>
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];
QTextCharFormat m_addedTrailingWhiteSpaceFormat;
};
DiffHighlighterPrivate::DiffHighlighterPrivate(const QRegExp &filePattern) :
m_filePattern(filePattern),
m_locationIndicator(QLatin1String("@@")),
m_diffInIndicator(QLatin1Char('+')),
m_diffOutIndicator(QLatin1Char('-'))
{
QTC_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) :
TextEditor::SyntaxHighlighter(document),
m_d(new DiffHighlighterPrivate(filePattern))
{
}
DiffHighlighter::~DiffHighlighter()
{
delete m_d;
}
// Check trailing spaces
static inline int trimmedLength(const QString &in)
{
for (int pos = in.length() - 1; pos >= 0; pos--)
if (!in.at(pos).isSpace())
return pos + 1;
return 0;
}
void DiffHighlighter::highlightBlock(const QString &text)
{
if (text.isEmpty())
return;
const int length = text.length();
const DiffFormats format = m_d->analyzeLine(text);
switch (format) {
case DiffTextFormat:
break;
case DiffInFormat: {
// Mark trailing whitespace.
const int trimmedLen = trimmedLength(text);
setFormat(0, trimmedLen, m_d->m_formats[format]);
if (trimmedLen != length)
setFormat(trimmedLen, length - trimmedLen, m_d->m_addedTrailingWhiteSpaceFormat);
}
break;
default:
setFormat(0, length, m_d->m_formats[format]);
break;
}
}
static inline QTextCharFormat invertedColorFormat(const QTextCharFormat &in)
{
QTextCharFormat rc = in;
rc.setForeground(in.background());
rc.setBackground(in.foreground());
return rc;
}
void DiffHighlighter::setFormats(const QVector<QTextCharFormat> &s)
{
if (s.size() == NumDiffFormats) {
qCopy(s.constBegin(), s.constEnd(), m_d->m_formats);
// Display trailing blanks with colors swapped
m_d->m_addedTrailingWhiteSpaceFormat = invertedColorFormat(m_d->m_formats[DiffInFormat]);
} else {
qWarning("%s: insufficient setting size: %d", Q_FUNC_INFO, s.size());
}
}
QRegExp DiffHighlighter::filePattern() const
{
return m_d->m_filePattern;
}
} // namespace VCSBase
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