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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include "qqmlenginecontrolservice.h"
#include <private/qqmldebugconnector_p.h>
#include <private/qversionedpacket_p.h>
#include <QJSEngine>
QT_BEGIN_NAMESPACE
using QQmlDebugPacket = QVersionedPacket<QQmlDebugConnector>;
QQmlEngineControlServiceImpl::QQmlEngineControlServiceImpl(QObject *parent) :
QQmlEngineControlService(1, parent)
{
blockingMode = QQmlDebugConnector::instance()->blockingMode();
}
void QQmlEngineControlServiceImpl::messageReceived(const QByteArray &message)
{
QMutexLocker lock(&dataMutex);
QQmlDebugPacket d(message);
qint32 command;
qint32 engineId;
d >> command >> engineId;
QJSEngine *engine = qobject_cast<QJSEngine *>(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 QQmlEngineControlServiceImpl::engineAboutToBeAdded(QJSEngine *engine)
{
QMutexLocker lock(&dataMutex);
if (blockingMode && state() == Enabled) {
Q_ASSERT(!stoppingEngines.contains(engine));
Q_ASSERT(!startingEngines.contains(engine));
startingEngines.append(engine);
sendMessage(EngineAboutToBeAdded, engine);
} else {
emit attachedToEngine(engine);
}
}
void QQmlEngineControlServiceImpl::engineAboutToBeRemoved(QJSEngine *engine)
{
QMutexLocker lock(&dataMutex);
if (blockingMode && state() == Enabled) {
Q_ASSERT(!stoppingEngines.contains(engine));
Q_ASSERT(!startingEngines.contains(engine));
stoppingEngines.append(engine);
sendMessage(EngineAboutToBeRemoved, engine);
} else {
emit detachedFromEngine(engine);
}
}
void QQmlEngineControlServiceImpl::engineAdded(QJSEngine *engine)
{
if (state() == Enabled) {
QMutexLocker lock(&dataMutex);
Q_ASSERT(!startingEngines.contains(engine));
Q_ASSERT(!stoppingEngines.contains(engine));
sendMessage(EngineAdded, engine);
}
}
void QQmlEngineControlServiceImpl::engineRemoved(QJSEngine *engine)
{
if (state() == Enabled) {
QMutexLocker lock(&dataMutex);
Q_ASSERT(!startingEngines.contains(engine));
Q_ASSERT(!stoppingEngines.contains(engine));
sendMessage(EngineRemoved, engine);
}
}
void QQmlEngineControlServiceImpl::sendMessage(QQmlEngineControlServiceImpl::MessageType type,
QJSEngine *engine)
{
QQmlDebugPacket d;
d << static_cast<qint32>(type) << idForObject(engine);
emit messageToClient(name(), d.data());
}
void QQmlEngineControlServiceImpl::stateChanged(State)
{
// We flush everything for any kind of state change, to avoid complicated timing issues.
QMutexLocker lock(&dataMutex);
for (QJSEngine *engine : qAsConst(startingEngines))
emit attachedToEngine(engine);
startingEngines.clear();
for (QJSEngine *engine : qAsConst(stoppingEngines))
emit detachedFromEngine(engine);
stoppingEngines.clear();
}
QT_END_NAMESPACE
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