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diff --git a/embeddedobj/source/msole/ownview.hxx b/embeddedobj/source/msole/ownview.hxx
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+++ b/embeddedobj/source/msole/ownview.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <com/sun/star/util/XCloseListener.hpp>
+#include <com/sun/star/document/XEventListener.hpp>
+#include <com/sun/star/frame/XModel.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <cppuhelper/implbase.hxx>
+
+#include <osl/mutex.hxx>
+
+class OwnView_Impl : public ::cppu::WeakImplHelper < css::util::XCloseListener,
+                                                      css::document::XEventListener >
+{
+    ::osl::Mutex m_aMutex;
+
+    css::uno::Reference< css::uno::XComponentContext > m_xContext;
+    css::uno::Reference< css::frame::XModel > m_xModel;
+
+    OUString m_aTempFileURL;
+    OUString m_aNativeTempURL;
+
+    OUString m_aFilterName;
+
+    bool m_bBusy;
+
+    bool m_bUseNative;
+
+private:
+    bool CreateModelFromURL( const OUString& aFileURL );
+
+    bool CreateModel( bool bUseNative );
+
+    bool ReadContentsAndGenerateTempFile( const css::uno::Reference< css::io::XInputStream >& xStream, bool bParseHeader );
+
+    void CreateNative();
+
+public:
+    static OUString GetFilterNameFromExtentionAndInStream(
+                                const css::uno::Reference< css::uno::XComponentContext >& xContext,
+                                std::u16string_view aNameWithExtention,
+                                const css::uno::Reference< css::io::XInputStream >& xInputStream );
+
+    OwnView_Impl( const css::uno::Reference< css::uno::XComponentContext >& xContext,
+                  const css::uno::Reference< css::io::XInputStream >& xStream );
+    virtual ~OwnView_Impl() override;
+
+    bool Open();
+
+    void Close();
+
+    virtual void SAL_CALL notifyEvent( const css::document::EventObject& Event ) override;
+
+    virtual void SAL_CALL queryClosing( const css::lang::EventObject& Source, sal_Bool GetsOwnership ) override;
+    virtual void SAL_CALL notifyClosing( const css::lang::EventObject& Source ) override;
+
+    virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */