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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing
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**
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** This file is part of Qt Creator.
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**
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** 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
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** a written agreement between you and The Qt Company.  For licensing terms and
** conditions see http://www.qt.io/terms-conditions.  For further information
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** use the contact form at http://www.qt.io/contact-us.
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**
** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** 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.
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**
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** In addition, as a special exception, The Qt Company gives you certain additional
** rights.  These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
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****************************************************************************/
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#include "nodeinstanceserverproxy.h"

#include <QLocalServer>
#include <QLocalSocket>
#include <QProcess>
#include <QCoreApplication>
#include <QUuid>
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#include <QFileInfo>
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#include <QDir>
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#include <QTimer>
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#include <QTextStream>
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#include <QMessageBox>
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#include "createinstancescommand.h"
#include "createscenecommand.h"
#include "changevaluescommand.h"
#include "changebindingscommand.h"
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#include "changeauxiliarycommand.h"
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#include "changefileurlcommand.h"
#include "removeinstancescommand.h"
#include "clearscenecommand.h"
#include "removepropertiescommand.h"
#include "reparentinstancescommand.h"
#include "changeidscommand.h"
#include "changestatecommand.h"
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#include "completecomponentcommand.h"
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#include "changenodesourcecommand.h"
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#include "informationchangedcommand.h"
#include "pixmapchangedcommand.h"
#include "valueschangedcommand.h"
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#include "childrenchangedcommand.h"
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#include "statepreviewimagechangedcommand.h"
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#include "componentcompletedcommand.h"
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#include "tokencommand.h"
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#include "removesharedmemorycommand.h"
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#include "endpuppetcommand.h"
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#include "synchronizecommand.h"
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#include "debugoutputcommand.h"
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#include "nodeinstanceview.h"
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#include "import.h"
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#include "qmldesignerplugin.h"

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#include "puppetcreator.h"

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#include <coreplugin/icore.h>
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#include <utils/hostosinfo.h>
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#include <coreplugin/messagebox.h>
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#include <coreplugin/editormanager/editormanager.h>
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#include <projectexplorer/kit.h>
#include <qtsupport/qtkitinformation.h>
#include <qtsupport/baseqtversion.h>
#include <qtsupport/qtsupportconstants.h>
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namespace QmlDesigner {

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static bool hasQtQuick1(NodeInstanceView *nodeInstanceView)
{
    if (nodeInstanceView && nodeInstanceView->model()) {
        foreach (const Import &import ,nodeInstanceView->model()->imports()) {
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            if (import.url() ==  QLatin1String("QtQuick") && import.version().toDouble() < 2.0)
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                return true;
        }
    }

    return false;
}

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static void showCannotConnectToPuppetWarningAndSwitchToEditMode()
{
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    Core::AsynchronousMessageBox::warning(QCoreApplication::translate("NodeInstanceServerProxy", "Cannot Connect to QML Emulation Layer (QML Puppet)"),
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                                           QCoreApplication::translate("NodeInstanceServerProxy", "The executable of the QML emulation layer (QML Puppet) may not be responding. "
                                                                                                  "Switching to another kit might help."));
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    QmlDesignerPlugin::instance()->switchToTextModeDeferred();

}

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NodeInstanceServerProxy::NodeInstanceServerProxy(NodeInstanceView *nodeInstanceView, RunModus runModus, ProjectExplorer::Kit *kit)
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    : NodeInstanceServerInterface(nodeInstanceView),
      m_localServer(new QLocalServer(this)),
      m_nodeInstanceView(nodeInstanceView),
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      m_firstBlockSize(0),
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      m_secondBlockSize(0),
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      m_thirdBlockSize(0),
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      m_writeCommandCounter(0),
      m_firstLastReadCommandCounter(0),
      m_secondLastReadCommandCounter(0),
      m_thirdLastReadCommandCounter(0),
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      m_runModus(runModus),
      m_synchronizeId(-1)
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{
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   QString socketToken(QUuid::createUuid().toString());
   m_localServer->listen(socketToken);
   m_localServer->setMaxPendingConnections(3);

   PuppetCreator::QmlPuppetVersion puppetVersion = hasQtQuick1(nodeInstanceView) ? PuppetCreator::Qml1Puppet : PuppetCreator::Qml2Puppet;
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   PuppetCreator puppetCreator(kit, QString(), nodeInstanceView->model(), puppetVersion);
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   puppetCreator.setQrcMappingString(qrcMappingString());
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   puppetCreator.createPuppetExecutableIfMissing();
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   m_qmlPuppetEditorProcess = puppetCreator.createPuppetProcess("editormode",
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                                                              socketToken,
                                                              this,
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                                                              SLOT(printEditorProcessOutput()),
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                                                              SLOT(processFinished(int,QProcess::ExitStatus)));

   if (runModus == NormalModus) {
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       m_qmlPuppetRenderProcess = puppetCreator.createPuppetProcess("rendermode",
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                                                                    socketToken,
                                                                    this,
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                                                                    SLOT(printRenderProcessOutput()),
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                                                                    SLOT(processFinished(int,QProcess::ExitStatus)));
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       m_qmlPuppetPreviewProcess = puppetCreator.createPuppetProcess("previewmode",
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                                                                     socketToken,
                                                                     this,
                                                                     SLOT(printPreviewProcessOutput()),
                                                                     SLOT(processFinished(int,QProcess::ExitStatus)));
   }
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   if (m_qmlPuppetEditorProcess->waitForStarted(10000)) {
       connect(m_qmlPuppetEditorProcess.data(), SIGNAL(finished(int)), m_qmlPuppetEditorProcess.data(),SLOT(deleteLater()));
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       if (runModus == NormalModus) {
           m_qmlPuppetPreviewProcess->waitForStarted();
           connect(m_qmlPuppetPreviewProcess.data(), SIGNAL(finished(int)), m_qmlPuppetPreviewProcess.data(),SLOT(deleteLater()));
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           m_qmlPuppetRenderProcess->waitForStarted();
           connect(m_qmlPuppetRenderProcess.data(), SIGNAL(finished(int)), m_qmlPuppetRenderProcess.data(),SLOT(deleteLater()));
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       }
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       bool connectedToPuppet = true;
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       if (!m_localServer->hasPendingConnections())
           connectedToPuppet = m_localServer->waitForNewConnection(3000);

       if (connectedToPuppet) {
           m_firstSocket = m_localServer->nextPendingConnection();
           connect(m_firstSocket.data(), SIGNAL(readyRead()), this, SLOT(readFirstDataStream()));

           if (runModus == NormalModus) {
               if (!m_localServer->hasPendingConnections())
                   connectedToPuppet = m_localServer->waitForNewConnection(3000);

               if (connectedToPuppet) {
                   m_secondSocket = m_localServer->nextPendingConnection();
                   connect(m_secondSocket.data(), SIGNAL(readyRead()), this, SLOT(readSecondDataStream()));

                   if (!m_localServer->hasPendingConnections())
                        connectedToPuppet = m_localServer->waitForNewConnection(3000);

                   if (connectedToPuppet) {
                       m_thirdSocket = m_localServer->nextPendingConnection();
                       connect(m_thirdSocket.data(), SIGNAL(readyRead()), this, SLOT(readThirdDataStream()));
                   } else {
                       showCannotConnectToPuppetWarningAndSwitchToEditMode();
                   }
               } else {
                   showCannotConnectToPuppetWarningAndSwitchToEditMode();
               }
           }
       } else {
           showCannotConnectToPuppetWarningAndSwitchToEditMode();
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       }
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   } else {
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       Core::AsynchronousMessageBox::warning(tr("Cannot Start QML Emulation Layer (QML Puppet)"),
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                                              tr("The executable of the QML emulation layer (QML Puppet) process cannot be started or does not respond."));
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       QmlDesignerPlugin::instance()->switchToTextModeDeferred();
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   }
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   m_localServer->close();


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   int indexOfCapturePuppetStream = QCoreApplication::arguments().indexOf("-capture-puppet-stream");
   if (indexOfCapturePuppetStream > 0) {
       m_captureFileForTest.setFileName(QCoreApplication::arguments().at(indexOfCapturePuppetStream + 1));
       bool isOpen = m_captureFileForTest.open(QIODevice::WriteOnly);
       qDebug() << "file is open: " << isOpen;
   }
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   m_firstTimer.setInterval(3000);
   m_secondTimer.setInterval(3000);
   m_thirdTimer.setInterval(3000);

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   if (qgetenv("DEBUG_QML_PUPPET").isEmpty()) {
       connect(&m_firstTimer, SIGNAL(timeout()), this, SLOT(processFinished()));
       connect(&m_secondTimer, SIGNAL(timeout()), this, SLOT(processFinished()));
       connect(&m_thirdTimer, SIGNAL(timeout()), this, SLOT(processFinished()));
   }
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}

NodeInstanceServerProxy::~NodeInstanceServerProxy()
{
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    disconnect(this, SLOT(processFinished(int,QProcess::ExitStatus)));

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    writeCommand(QVariant::fromValue(EndPuppetCommand()));

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    if (m_firstSocket) {
        m_firstSocket->waitForBytesWritten(1000);
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        m_firstSocket->abort();
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    }
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    if (m_secondSocket) {
        m_secondSocket->waitForBytesWritten(1000);
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        m_secondSocket->abort();
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    }
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    if (m_thirdSocket) {
        m_thirdSocket->waitForBytesWritten(1000);
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        m_thirdSocket->abort();
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    }
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    if (m_qmlPuppetEditorProcess) {
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        QTimer::singleShot(3000, m_qmlPuppetEditorProcess.data(), SLOT(terminate()));
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        QTimer::singleShot(6000, m_qmlPuppetEditorProcess.data(), SLOT(kill()));
    }
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    if (m_qmlPuppetPreviewProcess) {
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        QTimer::singleShot(3000, m_qmlPuppetPreviewProcess.data(), SLOT(terminate()));
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        QTimer::singleShot(6000, m_qmlPuppetPreviewProcess.data(), SLOT(kill()));
    }
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    if (m_qmlPuppetRenderProcess) {
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         QTimer::singleShot(3000, m_qmlPuppetRenderProcess.data(), SLOT(terminate()));
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         QTimer::singleShot(6000, m_qmlPuppetRenderProcess.data(), SLOT(kill()));
    }
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}

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void NodeInstanceServerProxy::dispatchCommand(const QVariant &command, PuppetStreamType puppetStreamType)
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{
    static const int informationChangedCommandType = QMetaType::type("InformationChangedCommand");
    static const int valuesChangedCommandType = QMetaType::type("ValuesChangedCommand");
    static const int pixmapChangedCommandType = QMetaType::type("PixmapChangedCommand");
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    static const int childrenChangedCommandType = QMetaType::type("ChildrenChangedCommand");
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    static const int statePreviewImageChangedCommandType = QMetaType::type("StatePreviewImageChangedCommand");
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    static const int componentCompletedCommandType = QMetaType::type("ComponentCompletedCommand");
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    static const int synchronizeCommandType = QMetaType::type("SynchronizeCommand");
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    static const int tokenCommandType = QMetaType::type("TokenCommand");
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    static const int debugOutputCommandType = QMetaType::type("DebugOutputCommand");
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    static const int puppetAliveCommandType = QMetaType::type("PuppetAliveCommand");
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    if (command.userType() ==  informationChangedCommandType) {
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        nodeInstanceClient()->informationChanged(command.value<InformationChangedCommand>());
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    } else if (command.userType() ==  valuesChangedCommandType) {
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        nodeInstanceClient()->valuesChanged(command.value<ValuesChangedCommand>());
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    } else if (command.userType() ==  pixmapChangedCommandType) {
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        nodeInstanceClient()->pixmapChanged(command.value<PixmapChangedCommand>());
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    } else if (command.userType() == childrenChangedCommandType) {
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        nodeInstanceClient()->childrenChanged(command.value<ChildrenChangedCommand>());
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    } else if (command.userType() == statePreviewImageChangedCommandType) {
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        nodeInstanceClient()->statePreviewImagesChanged(command.value<StatePreviewImageChangedCommand>());
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    } else if (command.userType() == componentCompletedCommandType) {
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        nodeInstanceClient()->componentCompleted(command.value<ComponentCompletedCommand>());
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    } else if (command.userType() == tokenCommandType) {
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        nodeInstanceClient()->token(command.value<TokenCommand>());
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    } else if (command.userType() == debugOutputCommandType) {
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        nodeInstanceClient()->debugOutput(command.value<DebugOutputCommand>());
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    } else if (command.userType() == puppetAliveCommandType) {
        puppetAlive(puppetStreamType);
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    } else if (command.userType() == synchronizeCommandType) {
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        SynchronizeCommand synchronizeCommand = command.value<SynchronizeCommand>();
        m_synchronizeId = synchronizeCommand.synchronizeId();
    }  else
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        Q_ASSERT(false);
}

NodeInstanceClientInterface *NodeInstanceServerProxy::nodeInstanceClient() const
{
    return m_nodeInstanceView.data();
}

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void NodeInstanceServerProxy::puppetAlive(NodeInstanceServerProxy::PuppetStreamType puppetStreamType)
{
    switch (puppetStreamType) {
    case FirstPuppetStream:
        m_firstTimer.stop();
        m_firstTimer.start();
        break;
    case SecondPuppetStream:
        m_secondTimer.stop();
        m_secondTimer.start();
        break;
    case ThirdPuppetStream:
        m_thirdTimer.stop();
        m_thirdTimer.start();
        break;
    default:
        break;
    }
}

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QString NodeInstanceServerProxy::qrcMappingString() const
{
    if (m_nodeInstanceView && m_nodeInstanceView.data()->model()) {
        RewriterView *rewriterView = m_nodeInstanceView.data()->model()->rewriterView();
        if (rewriterView) {
            QString mappingString;

            typedef QPair<QString, QString> StringPair;

            foreach (const StringPair &pair, rewriterView->qrcMapping()) {
                if (!mappingString.isEmpty())
                    mappingString.append(QLatin1String(","));
                mappingString.append(pair.first);
                mappingString.append(QLatin1String("="));
                mappingString.append(pair.second);
            }

            return mappingString;
        }
    }

    return QString();
}

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void NodeInstanceServerProxy::processFinished()
{
    processFinished(-1, QProcess::CrashExit);
}

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static void writeCommandToIODecive(const QVariant &command, QIODevice *ioDevice, unsigned int commandCounter)
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{
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    if (ioDevice) {
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        QByteArray block;
        QDataStream out(&block, QIODevice::WriteOnly);
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        out.setVersion(QDataStream::Qt_4_8);
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        out << quint32(0);
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        out << quint32(commandCounter);
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        out << command;
        out.device()->seek(0);
        out << quint32(block.size() - sizeof(quint32));

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        ioDevice->write(block);
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    }
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}

void NodeInstanceServerProxy::writeCommand(const QVariant &command)
{
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    writeCommandToIODecive(command, m_firstSocket.data(), m_writeCommandCounter);
    writeCommandToIODecive(command, m_secondSocket.data(), m_writeCommandCounter);
    writeCommandToIODecive(command, m_thirdSocket.data(), m_writeCommandCounter);

    if (m_captureFileForTest.isWritable()) {
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        qDebug() << "Write stream to file: " << m_captureFileForTest.fileName();
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        writeCommandToIODecive(command, &m_captureFileForTest, m_writeCommandCounter);
        qDebug() << "\twrite file: " << m_captureFileForTest.pos();
    }

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    m_writeCommandCounter++;
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    if (m_runModus == TestModus) {
        static int synchronizeId = 0;
        synchronizeId++;
        SynchronizeCommand synchronizeCommand(synchronizeId);

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        writeCommandToIODecive(QVariant::fromValue(synchronizeCommand), m_firstSocket.data(), m_writeCommandCounter);
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        m_writeCommandCounter++;
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        while (m_firstSocket->waitForReadyRead(100)) {
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                readFirstDataStream();
                if (m_synchronizeId == synchronizeId)
                    return;
        }
    }
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}

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void NodeInstanceServerProxy::processFinished(int exitCode, QProcess::ExitStatus exitStatus)
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{
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    QProcess* finishedProcess = qobject_cast<QProcess*>(sender());
    if (finishedProcess)
        qWarning() << "Process" << (exitStatus == QProcess::CrashExit ? "crashed:" : "finished:") << finishedProcess->arguments() << "exitCode:" << exitCode;
    else
        qWarning() << "Process" << (exitStatus == QProcess::CrashExit ? "crashed:" : "finished:") << sender() << "exitCode:" << exitCode;
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    if (m_captureFileForTest.isOpen()) {
        m_captureFileForTest.close();
        m_captureFileForTest.remove();
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        Core::AsynchronousMessageBox::warning(tr("QML Emulation Layer (QML Puppet) Crashed"),
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                             tr("You are recording a puppet stream and the emulations layer crashed. "
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                                "It is recommended to reopen the Qt Quick Designer and start again."));
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    }


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    writeCommand(QVariant::fromValue(EndPuppetCommand()));

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    if (m_firstSocket) {
        m_firstSocket->waitForBytesWritten(1000);
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        m_firstSocket->abort();
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    }

    if (m_secondSocket) {
        m_secondSocket->waitForBytesWritten(1000);
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        m_secondSocket->abort();
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    }

    if (m_thirdSocket) {
        m_thirdSocket->waitForBytesWritten(1000);
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        m_thirdSocket->abort();
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    }
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    if (exitStatus == QProcess::CrashExit)
        emit processCrashed();
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}

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void NodeInstanceServerProxy::readFirstDataStream()
{
    QList<QVariant> commandList;

    while (!m_firstSocket->atEnd()) {
        if (m_firstSocket->bytesAvailable() < int(sizeof(quint32)))
            break;

        QDataStream in(m_firstSocket.data());
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        in.setVersion(QDataStream::Qt_4_8);
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        if (m_firstBlockSize == 0)
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            in >> m_firstBlockSize;

        if (m_firstSocket->bytesAvailable() < m_firstBlockSize)
            break;

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        quint32 commandCounter;
        in >> commandCounter;
        bool commandLost = !((m_firstLastReadCommandCounter == 0 && commandCounter == 0) || (m_firstLastReadCommandCounter + 1 == commandCounter));
        if (commandLost)
            qDebug() << "server command lost: " << m_firstLastReadCommandCounter <<  commandCounter;
        m_firstLastReadCommandCounter = commandCounter;


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        QVariant command;
        in >> command;
        m_firstBlockSize = 0;

        commandList.append(command);
    }

    foreach (const QVariant &command, commandList) {
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        dispatchCommand(command, FirstPuppetStream);
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    }
}

void NodeInstanceServerProxy::readSecondDataStream()
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{
    QList<QVariant> commandList;

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    while (!m_secondSocket->atEnd()) {
        if (m_secondSocket->bytesAvailable() < int(sizeof(quint32)))
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            break;

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        QDataStream in(m_secondSocket.data());
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        in.setVersion(QDataStream::Qt_4_8);
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        if (m_secondBlockSize == 0)
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            in >> m_secondBlockSize;
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        if (m_secondSocket->bytesAvailable() < m_secondBlockSize)
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            break;

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        quint32 commandCounter;
        in >> commandCounter;
        bool commandLost = !((m_secondLastReadCommandCounter == 0 && commandCounter == 0) || (m_secondLastReadCommandCounter + 1 == commandCounter));
        if (commandLost)
            qDebug() << "server command lost: " << m_secondLastReadCommandCounter <<  commandCounter;
        m_secondLastReadCommandCounter = commandCounter;


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        QVariant command;
        in >> command;
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        m_secondBlockSize = 0;
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        commandList.append(command);
    }

    foreach (const QVariant &command, commandList) {
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        dispatchCommand(command, SecondPuppetStream);
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    }
}

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void NodeInstanceServerProxy::readThirdDataStream()
{
    QList<QVariant> commandList;

    while (!m_thirdSocket->atEnd()) {
        if (m_thirdSocket->bytesAvailable() < int(sizeof(quint32)))
            break;

        QDataStream in(m_thirdSocket.data());
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        in.setVersion(QDataStream::Qt_4_8);
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        if (m_thirdBlockSize == 0)
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            in >> m_thirdBlockSize;

        if (m_thirdSocket->bytesAvailable() < m_thirdBlockSize)
            break;

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        quint32 commandCounter;
        in >> commandCounter;
        bool commandLost = !((m_thirdLastReadCommandCounter == 0 && commandCounter == 0) || (m_thirdLastReadCommandCounter + 1 == commandCounter));
        if (commandLost)
            qDebug() << "server command lost: " << m_thirdLastReadCommandCounter <<  commandCounter;
        m_thirdLastReadCommandCounter = commandCounter;


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        QVariant command;
        in >> command;
        m_thirdBlockSize = 0;

        commandList.append(command);
    }

    foreach (const QVariant &command, commandList) {
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        dispatchCommand(command, ThirdPuppetStream);
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    }
}

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void NodeInstanceServerProxy::printEditorProcessOutput()
{
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    while (m_qmlPuppetEditorProcess && m_qmlPuppetEditorProcess->canReadLine()) {
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        QByteArray line = m_qmlPuppetEditorProcess->readLine();
        line.chop(1);
        qDebug().nospace() << "Editor Puppet: " << qPrintable(line);
    }
    qDebug() << "\n";
}

void NodeInstanceServerProxy::printPreviewProcessOutput()
{
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    while (m_qmlPuppetPreviewProcess && m_qmlPuppetPreviewProcess->canReadLine()) {
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        QByteArray line = m_qmlPuppetPreviewProcess->readLine();
        line.chop(1);
        qDebug().nospace() << "Preview Puppet: " << qPrintable(line);
    }
    qDebug() << "\n";
}

void NodeInstanceServerProxy::printRenderProcessOutput()
{
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    while (m_qmlPuppetRenderProcess && m_qmlPuppetRenderProcess->canReadLine()) {
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        QByteArray line = m_qmlPuppetRenderProcess->readLine();
        line.chop(1);
        qDebug().nospace() << "Render Puppet: " << qPrintable(line);
    }

    qDebug() << "\n";
}

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void NodeInstanceServerProxy::createInstances(const CreateInstancesCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::changeFileUrl(const ChangeFileUrlCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::createScene(const CreateSceneCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::clearScene(const ClearSceneCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::removeInstances(const RemoveInstancesCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::removeProperties(const RemovePropertiesCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::changePropertyBindings(const ChangeBindingsCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::changePropertyValues(const ChangeValuesCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

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void NodeInstanceServerProxy::changeAuxiliaryValues(const ChangeAuxiliaryCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

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void NodeInstanceServerProxy::reparentInstances(const ReparentInstancesCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::changeIds(const ChangeIdsCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

void NodeInstanceServerProxy::changeState(const ChangeStateCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

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void NodeInstanceServerProxy::completeComponent(const CompleteComponentCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}
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void NodeInstanceServerProxy::changeNodeSource(const ChangeNodeSourceCommand &command)
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{
    writeCommand(QVariant::fromValue(command));
}

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void NodeInstanceServerProxy::token(const TokenCommand &command)
{
    writeCommand(QVariant::fromValue(command));
}

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void NodeInstanceServerProxy::removeSharedMemory(const RemoveSharedMemoryCommand &command)
{
   writeCommand(QVariant::fromValue(command));
}

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} // namespace QmlDesigner