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diff --git a/svx/source/inc/formdispatchinterceptor.hxx b/svx/source/inc/formdispatchinterceptor.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_SOURCE_INC_FORMDISPATCHINTERCEPTOR_HXX
+#define INCLUDED_SVX_SOURCE_INC_FORMDISPATCHINTERCEPTOR_HXX
+
+#include <com/sun/star/frame/XDispatchProviderInterceptor.hpp>
+#include <com/sun/star/frame/XDispatchProviderInterception.hpp>
+
+#include <cppuhelper/compbase.hxx>
+
+
+namespace svxform
+{
+
+    class DispatchInterceptor
+    {
+    public:
+        /// @throws css::uno::RuntimeException
+        virtual css::uno::Reference< css::frame::XDispatch> interceptedQueryDispatch(
+            const css::util::URL& aURL, const OUString& aTargetFrameName, sal_Int32 nSearchFlags) = 0;
+
+        virtual ::osl::Mutex* getInterceptorMutex() = 0;
+
+    protected:
+        DispatchInterceptor() {}
+
+        ~DispatchInterceptor() {}
+    };
+
+
+    //=
+
+    typedef ::cppu::WeakComponentImplHelper<   css::frame::XDispatchProviderInterceptor
+                                            ,   css::lang::XEventListener
+                                            >   DispatchInterceptionMultiplexer_BASE;
+
+    class DispatchInterceptionMultiplexer final : public DispatchInterceptionMultiplexer_BASE
+    {
+    public:
+        css::uno::Reference< css::frame::XDispatchProviderInterception> getIntercepted() const { return m_xIntercepted; }
+
+        DispatchInterceptionMultiplexer(
+            const css::uno::Reference< css::frame::XDispatchProviderInterception>& _rToIntercept,
+            DispatchInterceptor* _pMaster
+        );
+
+        // css::frame::XDispatchProvider
+        virtual css::uno::Reference< css::frame::XDispatch > SAL_CALL queryDispatch( const css::util::URL& aURL, const OUString& aTargetFrameName, sal_Int32 nSearchFlags ) override;
+        virtual css::uno::Sequence< css::uno::Reference< css::frame::XDispatch > > SAL_CALL queryDispatches( const css::uno::Sequence< css::frame::DispatchDescriptor >& aDescripts ) override;
+
+        // css::frame::XDispatchProviderInterceptor
+        virtual css::uno::Reference< css::frame::XDispatchProvider > SAL_CALL getSlaveDispatchProvider(  ) override;
+        virtual void SAL_CALL setSlaveDispatchProvider( const css::uno::Reference< css::frame::XDispatchProvider >& xNewDispatchProvider ) override;
+        virtual css::uno::Reference< css::frame::XDispatchProvider > SAL_CALL getMasterDispatchProvider(  ) override;
+        virtual void SAL_CALL setMasterDispatchProvider( const css::uno::Reference< css::frame::XDispatchProvider >& xNewSupplier ) override;
+
+        // css::lang::XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+        // OComponentHelper
+        virtual void SAL_CALL disposing() override;
+
+    private:
+        virtual ~DispatchInterceptionMultiplexer() override;
+
+        void ImplDetach();
+
+        ::osl::Mutex    m_aFallback;
+        ::osl::Mutex*   m_pMutex;
+
+        // the component which's dispatches we're intercepting
+        css::uno::WeakReference< css::frame::XDispatchProviderInterception >
+                        m_xIntercepted;
+        bool            m_bListening;
+
+        // the real interceptor
+        DispatchInterceptor*            m_pMaster;
+
+        // chaining
+        css::uno::Reference< css::frame::XDispatchProvider>           m_xSlaveDispatcher;
+        css::uno::Reference< css::frame::XDispatchProvider>           m_xMasterDispatcher;
+    };
+
+
+}
+
+
+#endif // INCLUDED_SVX_SOURCE_INC_FORMDISPATCHINTERCEPTOR_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */