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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "baseannotationhighlighter.h"
#include <math.h>
#include <QSet>
#include <QDebug>
#include <QColor>
#include <QTextDocument>
#include <QTextEdit>
#include <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;
QColor m_background;
};
} // namespace Internal
BaseAnnotationHighlighter::BaseAnnotationHighlighter(const ChangeNumbers &changeNumbers,
const QColor &bg,
QTextDocument *document) :
TextEditor::SyntaxHighlighter(document),
d(new Internal::BaseAnnotationHighlighterPrivate)
{
d->m_background = bg;
setChangeNumbers(changeNumbers);
}
BaseAnnotationHighlighter::~BaseAnnotationHighlighter()
{
delete d;
}
void BaseAnnotationHighlighter::setChangeNumbers(const ChangeNumbers &changeNumbers)
{
QColor bg = d->m_background;
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;
int half = factor / 2;
for (int i=0; i<=step; ++i)
for (int j=0; j<=step; ++j)
for (int k=0; k<=step; ++k) {
QColor c(i*factor, j*factor, k*factor);
if ((bg.red() - half > c.red() ||bg.red() + half <= c.red())
&& (bg.green() - half > c.green() || bg.green() + half <= c.green())
&& (bg.blue() - half > c.blue() || bg.blue() + half <= c.blue()))
colors.prepend(c);
}
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());
}
void BaseAnnotationHighlighter::setBackgroundColor(const QColor &color)
{
d->m_background = color;
setChangeNumbers(d->m_changeNumberMap.keys().toSet());
}
} // namespace VcsBase
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