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diff --git a/tools/qmlpreview/qmlpreviewapplication.h b/tools/qmlpreview/qmlpreviewapplication.h
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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QMLPREVIEWAPPLICATION_H
+#define QMLPREVIEWAPPLICATION_H
+
+#include <private/qqmlpreviewclient_p.h>
+#include <private/qqmldebugconnection_p.h>
+
+#include <QtCore/qcoreapplication.h>
+#include <QtCore/qprocess.h>
+#include <QtCore/qtimer.h>
+#include <QtCore/qfilesystemwatcher.h>
+
+#include <QtNetwork/qabstractsocket.h>
+
+class QmlPreviewApplication : public QCoreApplication
+{
+    Q_OBJECT
+public:
+    QmlPreviewApplication(int &argc, char **argv);
+    ~QmlPreviewApplication();
+
+    void parseArguments();
+    int exec();
+
+private:
+    void run();
+    void tryToConnect();
+    void processHasOutput();
+    void processFinished();
+
+    void logError(const QString &error);
+    void logStatus(const QString &status);
+
+    void serveRequest(const QString &request);
+    bool sendFile(const QString &path);
+    void sendDirectory(const QString &path);
+
+    QString m_programPath;
+    QStringList m_programArguments;
+    QScopedPointer<QProcess> m_process;
+    bool m_verbose;
+
+    QString m_socketFile;
+
+    QScopedPointer<QQmlDebugConnection> m_connection;
+    QScopedPointer<QQmlPreviewClient> m_qmlPreviewClient;
+    QFileSystemWatcher m_watcher;
+
+    QTimer m_loadTimer;
+    QTimer m_connectTimer;
+    uint m_connectionAttempts;
+
+    QStringList m_pendingFiles;
+};
+
+#endif // QMLPREVIEWAPPLICATION_H