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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 "qqmlenginecontrolservice.h"
#include <QQmlEngine>
QT_BEGIN_NAMESPACE
const QString QQmlEngineControlService::s_key = QStringLiteral("EngineControl");
QQmlEngineControlService::QQmlEngineControlService(QObject *parent) :
QQmlDebugService(s_key, 1, parent)
{
}
void QQmlEngineControlService::messageReceived(const QByteArray &message)
{
QMutexLocker lock(&dataMutex);
QQmlDebugStream d(message);
int command;
int engineId;
d >> command >> engineId;
QQmlEngine *engine = qobject_cast<QQmlEngine *>(objectForId(engineId));
if (command == StartWaitingEngine && startingEngines.contains(engine)) {
startingEngines.removeOne(engine);
emit attachedToEngine(engine);
} else if (command == StopWaitingEngine && stoppingEngines.contains(engine)) {
stoppingEngines.removeOne(engine);
emit detachedFromEngine(engine);
}
}
void QQmlEngineControlService::engineAboutToBeAdded(QQmlEngine *engine)
{
QMutexLocker lock(&dataMutex);
if (state() == Enabled) {
Q_ASSERT(!stoppingEngines.contains(engine));
Q_ASSERT(!startingEngines.contains(engine));
startingEngines.append(engine);
sendMessage(EngineAboutToBeAdded, engine);
} else {
emit attachedToEngine(engine);
}
}
void QQmlEngineControlService::engineAboutToBeRemoved(QQmlEngine *engine)
{
QMutexLocker lock(&dataMutex);
if (state() == Enabled) {
Q_ASSERT(!stoppingEngines.contains(engine));
Q_ASSERT(!startingEngines.contains(engine));
stoppingEngines.append(engine);
sendMessage(EngineAboutToBeRemoved, engine);
} else {
emit detachedFromEngine(engine);
}
}
void QQmlEngineControlService::engineAdded(QQmlEngine *engine)
{
if (state() == Enabled) {
QMutexLocker lock(&dataMutex);
Q_ASSERT(!startingEngines.contains(engine));
Q_ASSERT(!stoppingEngines.contains(engine));
sendMessage(EngineAdded, engine);
}
}
void QQmlEngineControlService::engineRemoved(QQmlEngine *engine)
{
if (state() == Enabled) {
QMutexLocker lock(&dataMutex);
Q_ASSERT(!startingEngines.contains(engine));
Q_ASSERT(!stoppingEngines.contains(engine));
sendMessage(EngineRemoved, engine);
}
}
void QQmlEngineControlService::sendMessage(QQmlEngineControlService::MessageType type, QQmlEngine *engine)
{
QByteArray message;
QQmlDebugStream d(&message, QIODevice::WriteOnly);
d << type << idForObject(engine);
emit messageToClient(name(), message);
}
void QQmlEngineControlService::stateChanged(State)
{
// We flush everything for any kind of state change, to avoid complicated timing issues.
QMutexLocker lock(&dataMutex);
foreach (QQmlEngine *engine, startingEngines)
emit attachedToEngine(engine);
startingEngines.clear();
foreach (QQmlEngine *engine, stoppingEngines)
emit detachedFromEngine(engine);
stoppingEngines.clear();
}
QT_END_NAMESPACE
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