1 files changed, 145 insertions, 0 deletions
diff --git a/src/qml/debugger/qqmlenginecontrolservice.cpp b/src/qml/debugger/qqmlenginecontrolservice.cpp
new file mode 100644
index 0000000000..90815912ad
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+++ b/src/qml/debugger/qqmlenginecontrolservice.cpp
@@ -0,0 +1,145 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QQmlEngine>
+#include "qqmldebug.h"
+#include "qqmlenginecontrolservice_p.h"
+
+QT_BEGIN_NAMESPACE
+
+Q_GLOBAL_STATIC(QQmlEngineControlService, qmlEngineControlService)
+
+QQmlEngineControlService::QQmlEngineControlService() :
+    QQmlDebugService(QStringLiteral("EngineControl"), 1)
+{
+    QMutexLocker lock(&dataMutex);
+    registerService();
+}
+
+QQmlEngineControlService *QQmlEngineControlService::instance()
+{
+    return qmlEngineControlService();
+}
+
+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);
+    QQmlDebugService::sendMessage(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