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diff --git a/sc/source/core/inc/addinlis.hxx b/sc/source/core/inc/addinlis.hxx
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+++ b/sc/source/core/inc/addinlis.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_SC_SOURCE_CORE_INC_ADDINLIS_HXX
+#define INCLUDED_SC_SOURCE_CORE_INC_ADDINLIS_HXX
+
+#include <memory>
+#include "adiasync.hxx"
+#include <com/sun/star/sheet/XResultListener.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <cppuhelper/implbase.hxx>
+
+namespace com::sun::star::sheet { class XVolatileResult; }
+namespace rtl { template <class reference_type> class Reference; }
+
+class ScDocument;
+
+class ScAddInListener : public cppu::WeakImplHelper<
+                            css::sheet::XResultListener,
+                            css::lang::XServiceInfo >,
+                        public SvtBroadcaster
+{
+private:
+    css::uno::Reference<css::sheet::XVolatileResult> xVolRes;
+    css::uno::Any aResult;
+    std::unique_ptr<ScAddInDocs> pDocs; // documents where this is used
+
+    static ::std::vector<rtl::Reference<ScAddInListener>> aAllListeners;
+
+    // always allocated via CreateListener
+    ScAddInListener( css::uno::Reference<css::sheet::XVolatileResult> const & xVR,
+                    ScDocument* pD );
+
+public:
+    virtual ~ScAddInListener() override;
+
+    // create Listener and put it into global list
+    static ScAddInListener* CreateListener(
+                                const css::uno::Reference<css::sheet::XVolatileResult>& xVR,
+                                ScDocument* pDoc );
+
+    static ScAddInListener* Get( const css::uno::Reference<css::sheet::XVolatileResult>& xVR );
+
+    static void RemoveDocument( ScDocument* pDocument );
+
+    bool HasDocument( ScDocument* pDoc ) const
+         { return pDocs->find( pDoc ) != pDocs->end(); }
+
+    void AddDocument( ScDocument* pDoc )
+         { pDocs->insert( pDoc ); }
+
+    const css::uno::Any& GetResult() const
+          { return aResult; }
+
+    // XResultListener
+    virtual void SAL_CALL modified( const css::sheet::ResultEvent& aEvent ) override;
+
+    // XEventListener
+    virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+
+    virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
+
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+};
+
+#endif // INCLUDED_SC_SOURCE_CORE_INC_ADDINLIS_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */