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diff --git a/include/svx/xmleohlp.hxx b/include/svx/xmleohlp.hxx
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+++ b/include/svx/xmleohlp.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 .
+ */
+
+#ifndef INCLUDED_SVX_XMLEOHLP_HXX
+#define INCLUDED_SVX_XMLEOHLP_HXX
+
+#include <cppuhelper/compbase.hxx>
+#include <osl/mutex.hxx>
+#include <com/sun/star/document/XEmbeddedObjectResolver.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/embed/XEmbeddedObject.hpp>
+#include <com/sun/star/embed/XStorage.hpp>
+#include <svx/svxdllapi.h>
+#include <rtl/ref.hxx>
+#include <tools/stream.hxx>
+#include <map>
+#include <memory>
+
+enum class SvXMLEmbeddedObjectHelperMode
+{
+    Read, Write
+};
+
+namespace comphelper { class IEmbeddedHelper; }
+
+class SvGlobalName;
+class OutputStorageWrapper_Impl;
+
+
+class SVXCORE_DLLPUBLIC SvXMLEmbeddedObjectHelper final :
+    public cppu::WeakComponentImplHelper< css::document::XEmbeddedObjectResolver, css::container::XNameAccess >
+{
+    ::osl::Mutex                maMutex;
+
+    OUString             maCurContainerStorageName;
+
+
+    css::uno::Reference < css::embed::XStorage > mxRootStorage;  // package
+    ::comphelper::IEmbeddedHelper*             mpDocPersist;
+    css::uno::Reference < css::embed::XStorage > mxContainerStorage; // container sub package for
+    css::uno::Reference < css::embed::XStorage > mxTempStorage;  // package
+                                                // objects
+    SvXMLEmbeddedObjectHelperMode       meCreateMode;
+    std::unique_ptr<std::map< OUString, rtl::Reference<OutputStorageWrapper_Impl> >>
+                                                 mpStreamMap;
+
+    SVX_DLLPRIVATE bool                 ImplGetStorageNames(
+                                       const OUString& rURLStr,
+                                       OUString& rContainerStorageName,
+                                       OUString& rObjectStorageName,
+                                       bool bInternalToExternal,
+                                       bool *pGraphicRepl=nullptr,
+                                       bool *pOasisFormat=nullptr ) const;
+
+    SVX_DLLPRIVATE css::uno::Reference < css::embed::XStorage > const & ImplGetContainerStorage(
+                                    const OUString& rStorageName );
+
+    SVX_DLLPRIVATE void                 ImplReadObject(
+                                    const OUString& rContainerStorageName,
+                                    OUString& rObjName,
+                                    const SvGlobalName *pClassId,
+                                    SvStream* pTemp );
+
+    SVX_DLLPRIVATE OUString              ImplInsertEmbeddedObjectURL(
+                                    const OUString& rURLStr );
+
+    SVX_DLLPRIVATE css::uno::Reference< css::io::XInputStream > ImplGetReplacementImage(
+                                const css::uno::Reference< css::embed::XEmbeddedObject >& xObj );
+
+                                SvXMLEmbeddedObjectHelper();
+                                virtual ~SvXMLEmbeddedObjectHelper() override;
+    void                        Init( const css::uno::Reference < css::embed::XStorage >&,
+                                      ::comphelper::IEmbeddedHelper& rDocPersist,
+                                      SvXMLEmbeddedObjectHelperMode eCreateMode );
+
+    virtual void SAL_CALL       disposing() override;
+
+public:
+                                SvXMLEmbeddedObjectHelper(
+                                    ::comphelper::IEmbeddedHelper& rDocPersist,
+                                    SvXMLEmbeddedObjectHelperMode eCreateMode );
+
+    static rtl::Reference<SvXMLEmbeddedObjectHelper> Create(
+                                    const css::uno::Reference < css::embed::XStorage >&,
+                                    ::comphelper::IEmbeddedHelper& rDocPersist,
+                                    SvXMLEmbeddedObjectHelperMode eCreateMode );
+    static rtl::Reference<SvXMLEmbeddedObjectHelper>   Create(
+                                    ::comphelper::IEmbeddedHelper& rDocPersist,
+                                    SvXMLEmbeddedObjectHelperMode eCreateMode );
+
+    // XEmbeddedObjectResolver
+    virtual OUString SAL_CALL resolveEmbeddedObjectURL( const OUString& aURL ) override;
+
+    // XNameAccess
+    virtual css::uno::Any SAL_CALL getByName( const OUString& aName ) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getElementNames(  ) override;
+    virtual sal_Bool SAL_CALL hasByName( const OUString& aName ) override;
+
+    // XNameAccess
+    virtual css::uno::Type SAL_CALL getElementType(  ) override;
+    virtual sal_Bool SAL_CALL hasElements(  ) override;
+
+
+    static void splitObjectURL(const OUString& aURLNoPar,
+        OUString& rContainerStorageName,
+        OUString& rObjectStorageName);
+};
+
+#endif // INCLUDED_SVX_XMLEOHLP_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */