text: /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtQml module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** 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 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.
  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 3 as published by the Free Software
  ** Foundation and appearing in the file LICENSE.LGPL3 included in the
  ** packaging of this file. Please review the following information to
  ** ensure the GNU Lesser General Public License version 3 requirements
  ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 2.0 or (at your option) the GNU General
  ** Public license version 3 or any later version approved by the KDE Free
  ** Qt Foundation. The licenses are as published by the Free Software
  ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
  ** included in the packaging of this file. Please review the following
  ** information to ensure the GNU General Public License requirements will
  ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
  ** https://www.gnu.org/licenses/gpl-3.0.html.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #ifndef QQMLDEBUGCONNECTOR_H
  #define QQMLDEBUGCONNECTOR_H
  
  #include <QtQml/qtqmlglobal.h>
  #include <QtQml/qjsengine.h>
  #include <QtCore/QVariantList>
  
  #if QT_CONFIG(qml_debug)
  #include <private/qqmldebugservice_p.h>
  #endif
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  QT_BEGIN_NAMESPACE
  
  #if !QT_CONFIG(qml_debug)
  
  class Q_QML_PRIVATE_EXPORT QQmlDebugConnector
  {
  public:
      static QQmlDebugConnector *instance() { return nullptr; }
  
      template<class Service>
      static Service *service() { return nullptr; }
  
      bool hasEngine(QJSEngine *) const { return false; }
      void addEngine(QJSEngine *) {}
      void removeEngine(QJSEngine *) {}
  
      bool open(const QVariantHash &configuration = QVariantHash())
      {
          Q_UNUSED(configuration);
          return false;
      }
  };
  
  #else
  
  class QQmlDebugService;
  class Q_QML_PRIVATE_EXPORT QQmlDebugConnector : public QObject
  {
      Q_OBJECT
  public:
      static void setPluginKey(const QString &key);
      static void setServices(const QStringList &services);
      static QQmlDebugConnector *instance();
      static int dataStreamVersion()
      {
          return s_dataStreamVersion;
      }
  
      virtual bool blockingMode() const = 0;
  
      virtual QQmlDebugService *service(const QString &name) const = 0;
  
      virtual void addEngine(QJSEngine *engine) = 0;
      virtual void removeEngine(QJSEngine *engine) = 0;
      virtual bool hasEngine(QJSEngine *engine) const = 0;
  
      virtual bool addService(const QString &name, QQmlDebugService *service) = 0;
      virtual bool removeService(const QString &name) = 0;
  
      virtual bool open(const QVariantHash &configuration = QVariantHash()) = 0;
  
      template<class Service>
      static Service *service()
      {
          QQmlDebugConnector *inst = instance();
          return inst ? static_cast<Service *>(inst->service(Service::s_key)) : nullptr;
      }
  
  protected:
      static QString commandLineArguments();
      static int s_dataStreamVersion;
  };
  
  class Q_QML_PRIVATE_EXPORT QQmlDebugConnectorFactory : public QObject {
      Q_OBJECT
  public:
      virtual QQmlDebugConnector *create(const QString &key) = 0;
      ~QQmlDebugConnectorFactory() override;
  };
  
  #define QQmlDebugConnectorFactory_iid "org.qt-project.Qt.QQmlDebugConnectorFactory"
  
  #endif
  
  QT_END_NAMESPACE
  
  #endif // QQMLDEBUGCONNECTOR_H
  