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diff --git a/include/comphelper/accessiblecomponenthelper.hxx b/include/comphelper/accessiblecomponenthelper.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_COMPHELPER_ACCESSIBLECOMPONENTHELPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLECOMPONENTHELPER_HXX
+
+#include <com/sun/star/accessibility/XAccessibleComponent.hpp>
+#include <com/sun/star/accessibility/XAccessibleExtendedComponent.hpp>
+#include <comphelper/accessiblecontexthelper.hxx>
+#include <cppuhelper/implbase1.hxx>
+#include <comphelper/uno3.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+
+namespace comphelper
+{
+
+
+    //= OCommonAccessibleComponent
+
+    /** base class encapsulating common functionality for the helper classes implementing
+        the XAccessibleComponent respectively XAccessibleExtendendComponent
+    */
+    class COMPHELPER_DLLPUBLIC OCommonAccessibleComponent : public OAccessibleContextHelper
+    {
+    protected:
+        /// see the respective base class ctor for an extensive comment on this, please
+        OCommonAccessibleComponent();
+        virtual ~OCommonAccessibleComponent() override;
+
+    protected:
+        /// implements the calculation of the bounding rectangle - still waiting to be overwritten
+        ///
+        /// @throws css::uno::RuntimeException
+        virtual css::awt::Rectangle implGetBounds(  ) = 0;
+
+    protected:
+        /** non-virtual versions of the methods which can be implemented using <method>implGetBounds</method>
+            note: getLocationOnScreen relies on a valid parent (XAccessibleContext::getParent()->getAccessibleContext()),
+                 which itself implements XAccessibleComponent
+
+            @throws css::uno::RuntimeException
+        */
+        bool containsPoint( const css::awt::Point& aPoint );
+        /// @throws css::uno::RuntimeException
+        css::awt::Point getLocation(  );
+        /// @throws css::uno::RuntimeException
+        css::awt::Point getLocationOnScreen(  );
+        /// @throws css::uno::RuntimeException
+        css::awt::Size getSize(  );
+        /// @throws css::uno::RuntimeException
+        css::awt::Rectangle getBounds(  );
+    };
+
+
+    //= OAccessibleComponentHelper
+
+
+    struct OAccessibleComponentHelper_Base :
+        public ::cppu::ImplHelper1< css::accessibility::XAccessibleComponent >
+    {
+    protected:
+        ~OAccessibleComponentHelper_Base() {}
+    };
+
+    /** a helper class for implementing an AccessibleContext which at the same time
+        supports an XAccessibleComponent interface.
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleComponentHelper
+            :public OCommonAccessibleComponent
+            ,public OAccessibleComponentHelper_Base
+    {
+    protected:
+        OAccessibleComponentHelper();
+
+    public:
+        // XInterface
+        DECLARE_XINTERFACE( )
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleComponent - default implementations
+        virtual sal_Bool SAL_CALL containsPoint( const css::awt::Point& aPoint ) override;
+        virtual css::awt::Point SAL_CALL getLocation(  ) override;
+        virtual css::awt::Point SAL_CALL getLocationOnScreen(  ) override;
+        virtual css::awt::Size SAL_CALL getSize(  ) override;
+        virtual css::awt::Rectangle SAL_CALL getBounds(  ) override;
+    };
+
+
+    //= OAccessibleExtendedComponentHelper
+
+
+    typedef ::cppu::ImplHelper1 <   css::accessibility::XAccessibleExtendedComponent
+                                >   OAccessibleExtendedComponentHelper_Base;
+
+    /** a helper class for implementing an AccessibleContext which at the same time
+        supports an XAccessibleExtendedComponent interface.
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleExtendedComponentHelper
+            :public OCommonAccessibleComponent
+            ,public OAccessibleExtendedComponentHelper_Base
+    {
+    protected:
+        OAccessibleExtendedComponentHelper( );
+
+    public:
+        // XInterface
+        DECLARE_XINTERFACE( )
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleComponent - default implementations
+        virtual sal_Bool SAL_CALL containsPoint( const css::awt::Point& aPoint ) override;
+        virtual css::awt::Point SAL_CALL getLocation(  ) override;
+        virtual css::awt::Point SAL_CALL getLocationOnScreen(  ) override;
+        virtual css::awt::Size SAL_CALL getSize(  ) override;
+        virtual css::awt::Rectangle SAL_CALL getBounds(  ) override;
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLECOMPONENTHELPER_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */