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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#include "diffhighlighter.h"
#include <texteditor/basetextdocumentlayout.h>
#include <utils/qtcassert.h>
#include <QtCore/QDebug>
#include <QtCore/QtAlgorithms>
#include <QtCore/QRegExp>
#include <QtGui/QBrush>
static const int BASE_LEVEL = 0;
static const int FILE_LEVEL = 1;
static const int LOCATION_LEVEL = 2;
namespace VCSBase {
namespace Internal {
// Formats used by DiffHighlighter
enum DiffFormats {
DiffTextFormat,
DiffInFormat,
DiffOutFormat,
DiffFileFormat,
DiffLocationFormat,
NumDiffFormats
};
enum FoldingState {
StartOfFile,
Header,
File,
Location
};
// --- DiffHighlighterPrivate
class DiffHighlighterPrivate {
public:
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;
FoldingState m_foldingState;
};
DiffHighlighterPrivate::DiffHighlighterPrivate(const QRegExp &filePattern) :
m_filePattern(filePattern),
m_locationIndicator(QLatin1String("@@")),
m_diffInIndicator(QLatin1Char('+')),
m_diffOutIndicator(QLatin1Char('-')),
m_foldingState(StartOfFile)
{
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;
}
} // namespace Internal
// --- DiffHighlighter
DiffHighlighter::DiffHighlighter(const QRegExp &filePattern,
QTextDocument *document) :
TextEditor::SyntaxHighlighter(document),
m_d(new Internal::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 Internal::DiffFormats format = m_d->analyzeLine(text);
switch (format) {
case Internal::DiffTextFormat:
break;
case Internal::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;
}
// codefolding:
TextEditor::TextBlockUserData *data =
TextEditor::BaseTextDocumentLayout::userData(currentBlock());
Q_ASSERT(data);
if (!TextEditor::BaseTextDocumentLayout::testUserData(currentBlock().previous()))
m_d->m_foldingState = Internal::StartOfFile;
switch (m_d->m_foldingState) {
case Internal::StartOfFile:
case Internal::Header:
switch (format) {
case Internal::DiffFileFormat:
m_d->m_foldingState = Internal::File;
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), BASE_LEVEL);
break;
case Internal::DiffLocationFormat:
m_d->m_foldingState = Internal::Location;
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
break;
default:
m_d->m_foldingState = Internal::Header;
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), BASE_LEVEL);
break;
}
break;
case Internal::File:
switch (format) {
case Internal::DiffFileFormat:
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
break;
case Internal::DiffLocationFormat:
m_d->m_foldingState = Internal::Location;
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
break;
default:
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
break;
}
break;
case Internal::Location:
switch (format) {
case Internal::DiffFileFormat:
m_d->m_foldingState = Internal::File;
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), BASE_LEVEL);
break;
case Internal::DiffLocationFormat:
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), FILE_LEVEL);
break;
default:
TextEditor::BaseTextDocumentLayout::setFoldingIndent(currentBlock(), LOCATION_LEVEL);
break;
}
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() == Internal::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[Internal::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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