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/***************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2008-2009 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 1.3, included in the file GPL_EXCEPTION.txt in this package.
**
***************************************************************************/
#include "baseannotationhighlighter.h"
#include <math.h>
#include <QtCore/QSet>
#include <QtCore/QDebug>
#include <QtGui/QColor>
#include <QtGui/QTextDocument>
#include <QtGui/QTextEdit>
#include <QtGui/QTextCharFormat>
typedef QMap<QString, QTextCharFormat> ChangeNumberFormatMap;
namespace VCSBase {
struct BaseAnnotationHighlighterPrivate {
ChangeNumberFormatMap m_changeNumberMap;
};
BaseAnnotationHighlighter::BaseAnnotationHighlighter(const ChangeNumbers &changeNumbers,
QTextDocument *document) :
QSyntaxHighlighter(document),
m_d(new BaseAnnotationHighlighterPrivate)
{
setChangeNumbers(changeNumbers);
}
BaseAnnotationHighlighter::~BaseAnnotationHighlighter()
{
delete m_d;
}
void BaseAnnotationHighlighter::setChangeNumbers(const ChangeNumbers &changeNumbers)
{
m_d->m_changeNumberMap.clear();
if (!changeNumbers.isEmpty()) {
// Assign a color gradient to annotation change numbers. Give
// each change number a unique color.
const double oneThird = 1.0 / 3.0;
const int step = qRound(ceil(pow(double(changeNumbers.count()), oneThird)));
QList<QColor> colors;
const int factor = 255 / step;
for (int i=0; i<step; ++i)
for (int j=0; j<step; ++j)
for (int k=0; k<step; ++k)
colors.append(QColor(i*factor, j*factor, k*factor));
int m = 0;
const int cstep = colors.count() / changeNumbers.count();
const ChangeNumbers::const_iterator cend = changeNumbers.constEnd();
for (ChangeNumbers::const_iterator it = changeNumbers.constBegin(); it != cend; ++it) {
QTextCharFormat format;
format.setForeground(colors.at(m));
m_d->m_changeNumberMap.insert(*it, format);
m += cstep;
}
}
}
void BaseAnnotationHighlighter::highlightBlock(const QString &text)
{
if (text.isEmpty() || m_d->m_changeNumberMap.empty())
return;
const QString change = changeNumber(text);
const ChangeNumberFormatMap::const_iterator it = m_d->m_changeNumberMap.constFind(change);
if (it != m_d->m_changeNumberMap.constEnd())
setFormat(0, text.length(), it.value());
}
} // namespace VCSBase
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