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diff --git a/include/comphelper/accessibleselectionhelper.hxx b/include/comphelper/accessibleselectionhelper.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_ACCESSIBLESELECTIONHELPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLESELECTIONHELPER_HXX
+
+#include <config_options.h>
+#include <comphelper/accessiblecomponenthelper.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/accessibility/XAccessibleSelection.hpp>
+#include <comphelper/comphelperdllapi.h>
+
+#define ACCESSIBLE_SELECTION_CHILD_ALL  (sal_Int32(-1))
+#define ACCESSIBLE_SELECTION_CHILD_SELF ((sal_Int32)-2)
+
+
+namespace comphelper
+{
+
+
+    //= OCommonAccessibleSelection
+
+    /** base class encapsulating common functionality for the helper classes implementing
+        the XAccessibleSelection
+    */
+    class COMPHELPER_DLLPUBLIC OCommonAccessibleSelection
+    {
+    protected:
+
+        OCommonAccessibleSelection();
+
+        ~OCommonAccessibleSelection();
+
+    protected:
+
+        // access to context - still waiting to be overwritten
+        /// @throws css::uno::RuntimeException
+        virtual css::uno::Reference< css::accessibility::XAccessibleContext >
+            implGetAccessibleContext() = 0;
+
+        // return if the specified child is visible => watch for special ChildIndexes (ACCESSIBLE_SELECTION_CHILD_xxx)
+        /// @throws css::uno::RuntimeException
+        virtual bool
+            implIsSelected( sal_Int64 nAccessibleChildIndex ) = 0;
+
+        // select the specified child => watch for special ChildIndexes (ACCESSIBLE_SELECTION_CHILD_xxx)
+        /// @throws css::uno::RuntimeException
+        virtual void
+            implSelect( sal_Int64 nAccessibleChildIndex, bool bSelect ) = 0;
+
+    protected:
+
+        /** non-virtual versions of the methods which can be implemented using <method>implIsSelected</method> and <method>implSelect</method>
+
+            @throws css::lang::IndexOutOfBoundsException
+            @throws css::uno::RuntimeException
+        */
+        void selectAccessibleChild( sal_Int64 nChildIndex );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::uno::RuntimeException
+        bool isAccessibleChildSelected( sal_Int64 nChildIndex );
+        /// @throws css::uno::RuntimeException
+        void clearAccessibleSelection(  );
+        /// @throws css::uno::RuntimeException
+        void selectAllAccessibleChildren(  );
+        /// @throws css::uno::RuntimeException
+        sal_Int64 getSelectedAccessibleChildCount(  );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::uno::RuntimeException
+        css::uno::Reference< css::accessibility::XAccessible > getSelectedAccessibleChild( sal_Int64 nSelectedChildIndex );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::uno::RuntimeException
+        void deselectAccessibleChild( sal_Int64 nSelectedChildIndex );
+    };
+
+
+    //= OAccessibleSelectionHelper
+
+
+    /** a helper class for implementing an AccessibleSelection which at the same time
+        supports an XAccessibleSelection interface.
+    */
+    class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OAccessibleSelectionHelper : public cppu::ImplInheritanceHelper<OAccessibleComponentHelper, css::accessibility::XAccessibleSelection>,
+                                       public OCommonAccessibleSelection
+    {
+    private:
+        OAccessibleSelectionHelper(OAccessibleSelectionHelper const &) = delete;
+        OAccessibleSelectionHelper(OAccessibleSelectionHelper &&) = delete;
+        void operator =(OAccessibleSelectionHelper const &) = delete;
+        void operator =(OAccessibleSelectionHelper &&) = delete;
+
+    protected:
+
+        OAccessibleSelectionHelper();
+
+        // return ourself here by default
+        virtual css::uno::Reference< css::accessibility::XAccessibleContext > implGetAccessibleContext() override;
+
+    public:
+
+        // XAccessibleSelection - default implementations
+        virtual void SAL_CALL selectAccessibleChild( sal_Int64 nChildIndex ) override;
+        virtual sal_Bool SAL_CALL isAccessibleChildSelected( sal_Int64 nChildIndex ) override;
+        virtual void SAL_CALL clearAccessibleSelection(  ) override;
+        virtual void SAL_CALL selectAllAccessibleChildren(  ) override;
+        virtual sal_Int64 SAL_CALL getSelectedAccessibleChildCount(  ) override;
+        virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getSelectedAccessibleChild( sal_Int64 nSelectedChildIndex ) override;
+        virtual void SAL_CALL deselectAccessibleChild( sal_Int64 nSelectedChildIndex ) override;
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLESELECTIONHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */