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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 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 the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** 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.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdebugmessageservice_p.h"
#include "qqmldebugservice_p_p.h"
#include <QDataStream>
#include <QMutex>
QT_BEGIN_NAMESPACE
Q_GLOBAL_STATIC(QDebugMessageService, qmlDebugMessageService)
void DebugMessageHandler(QtMsgType type, const QMessageLogContext &ctxt,
const QString &buf)
{
QDebugMessageService::instance()->sendDebugMessage(type, ctxt, buf);
}
class QDebugMessageServicePrivate : public QQmlDebugServicePrivate
{
public:
QDebugMessageServicePrivate()
: oldMsgHandler(0)
, prevState(QQmlDebugService::NotConnected)
{
}
QtMessageHandler oldMsgHandler;
QQmlDebugService::State prevState;
QMutex initMutex;
};
QDebugMessageService::QDebugMessageService(QObject *parent) :
QQmlDebugService(*(new QDebugMessageServicePrivate()),
QStringLiteral("DebugMessages"), 2, parent)
{
Q_D(QDebugMessageService);
// don't execute stateChanged() in parallel
QMutexLocker lock(&d->initMutex);
registerService();
if (state() == Enabled) {
d->oldMsgHandler = qInstallMessageHandler(DebugMessageHandler);
d->prevState = Enabled;
}
}
QDebugMessageService *QDebugMessageService::instance()
{
return qmlDebugMessageService();
}
void QDebugMessageService::sendDebugMessage(QtMsgType type,
const QMessageLogContext &ctxt,
const QString &buf)
{
Q_D(QDebugMessageService);
//We do not want to alter the message handling mechanism
//We just eavesdrop and forward the messages to a port
//only if a client is connected to it.
QByteArray message;
QQmlDebugStream ws(&message, QIODevice::WriteOnly);
ws << QByteArray("MESSAGE") << type << buf.toUtf8();
ws << QString::fromLatin1(ctxt.file).toUtf8();
ws << ctxt.line << QString::fromLatin1(ctxt.function).toUtf8();
sendMessage(message);
if (d->oldMsgHandler)
(*d->oldMsgHandler)(type, ctxt, buf);
}
void QDebugMessageService::stateChanged(State state)
{
Q_D(QDebugMessageService);
QMutexLocker lock(&d->initMutex);
if (state != Enabled && d->prevState == Enabled) {
QtMessageHandler handler = qInstallMessageHandler(d->oldMsgHandler);
// has our handler been overwritten in between?
if (handler != DebugMessageHandler)
qInstallMessageHandler(handler);
} else if (state == Enabled && d->prevState != Enabled) {
d->oldMsgHandler = qInstallMessageHandler(DebugMessageHandler);
}
d->prevState = state;
}
QT_END_NAMESPACE
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