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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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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