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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@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 "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;
/*!
\class VCSBase::BaseAnnotationHighlighter
\brief Base for a highlighter for annotation lines of the form 'changenumber:XXXX'.
The change numbers are assigned a color gradient. Example:
\code
112: text1 <color 1>
113: text2 <color 2>
112: text3 <color 1>
\endcode
*/
namespace VCSBase {
namespace Internal {
class BaseAnnotationHighlighterPrivate {
public:
ChangeNumberFormatMap m_changeNumberMap;
};
} // namespace Internal
BaseAnnotationHighlighter::BaseAnnotationHighlighter(const ChangeNumbers &changeNumbers,
QTextDocument *document) :
TextEditor::SyntaxHighlighter(document),
d(new Internal::BaseAnnotationHighlighterPrivate)
{
setChangeNumbers(changeNumbers);
}
BaseAnnotationHighlighter::~BaseAnnotationHighlighter()
{
delete d;
}
void BaseAnnotationHighlighter::setChangeNumbers(const ChangeNumbers &changeNumbers)
{
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));
d->m_changeNumberMap.insert(*it, format);
m += cstep;
}
}
}
void BaseAnnotationHighlighter::highlightBlock(const QString &text)
{
if (text.isEmpty() || d->m_changeNumberMap.empty())
return;
const QString change = changeNumber(text);
const ChangeNumberFormatMap::const_iterator it = d->m_changeNumberMap.constFind(change);
if (it != d->m_changeNumberMap.constEnd())
setFormat(0, text.length(), it.value());
}
} // namespace VCSBase
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