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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Linguist of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "sourcecodeview.h"
#include <QtCore/QFile>
#include <QtCore/QFileInfo>
#include <QtCore/QTextStream>
#include <QtGui/QTextCharFormat>
#include <QtGui/QTextBlock>
#include <QtGui/QTextCursor>
QT_BEGIN_NAMESPACE
SourceCodeView::SourceCodeView(QWidget *parent)
: QPlainTextEdit(parent),
m_isActive(true),
m_lineNumToLoad(0)
{
setReadOnly(true);
}
void SourceCodeView::setSourceContext(const QString &fileName, const int lineNum)
{
m_fileToLoad.clear();
setToolTip(fileName);
if (fileName.isNull()) {
clear();
m_currentFileName.clear();
appendHtml(tr("<i>Source code not available</i>"));
return;
}
if (m_isActive) {
showSourceCode(fileName, lineNum);
} else {
m_fileToLoad = fileName;
m_lineNumToLoad = lineNum;
}
}
void SourceCodeView::setActivated(bool activated)
{
m_isActive = activated;
if (activated && !m_fileToLoad.isEmpty()) {
showSourceCode(m_fileToLoad, m_lineNumToLoad);
m_fileToLoad.clear();
}
}
void SourceCodeView::showSourceCode(const QString &absFileName, const int lineNum)
{
QString fileText = fileHash.value(absFileName);
if (fileText.isNull()) { // File not in hash
m_currentFileName.clear();
// Assume fileName is relative to directory
QFile file(absFileName);
if (!file.exists()) {
clear();
appendHtml(tr("<i>File %1 not available</i>").arg(absFileName));
return;
}
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
clear();
appendHtml(tr("<i>File %1 not readable</i>").arg(absFileName));
return;
}
fileText = QString::fromLatin1(file.readAll());
fileHash.insert(absFileName, fileText);
}
if (m_currentFileName != absFileName) {
setPlainText(fileText);
m_currentFileName = absFileName;
}
QTextCursor cursor = textCursor();
cursor.setPosition(document()->findBlockByNumber(lineNum - 1).position());
setTextCursor(cursor);
centerCursor();
cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
cursor.movePosition(QTextCursor::Right, QTextCursor::KeepAnchor);
QTextEdit::ExtraSelection selectedLine;
selectedLine.cursor = cursor;
// Define custom color for line selection
const QColor fg = palette().color(QPalette::Highlight);
const QColor bg = palette().color(QPalette::Base);
QColor col;
const qreal ratio = 0.25;
col.setRedF(fg.redF() * ratio + bg.redF() * (1 - ratio));
col.setGreenF(fg.greenF() * ratio + bg.greenF() * (1 - ratio));
col.setBlueF(fg.blueF() * ratio + bg.blueF() * (1 - ratio));
selectedLine.format.setBackground(col);
selectedLine.format.setProperty(QTextFormat::FullWidthSelection, true);
setExtraSelections(QList<QTextEdit::ExtraSelection>() << selectedLine);
}
QT_END_NAMESPACE
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