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diff --git a/include/svtools/table/tablesort.hxx b/include/svtools/table/tablesort.hxx
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+++ b/include/svtools/table/tablesort.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 SVTOOLS_TABLESORT_HXX
+#define SVTOOLS_TABLESORT_HXX
+
+#include "svtools/table/tabletypes.hxx"
+
+//......................................................................................................................
+namespace svt { namespace table
+{
+//......................................................................................................................
+
+    //==================================================================================================================
+    //= ColumnSortDirection
+    //==================================================================================================================
+    enum ColumnSortDirection
+    {
+        ColumnSortAscending,
+        ColumnSortDescending
+    };
+
+    //==================================================================================================================
+    //= ColumnSort
+    //==================================================================================================================
+    struct ColumnSort
+    {
+        ColPos              nColumnPos;
+        ColumnSortDirection eSortDirection;
+
+        ColumnSort()
+            :nColumnPos( COL_INVALID )
+            ,eSortDirection( ColumnSortAscending )
+        {
+        }
+
+        ColumnSort( ColPos const i_columnPos, ColumnSortDirection const i_sortDirection )
+            :nColumnPos( i_columnPos )
+            ,eSortDirection( i_sortDirection )
+        {
+        }
+    };
+
+    //==================================================================================================================
+    //= ITableDataSort
+    //==================================================================================================================
+    /** provides sorting functionality for the datta underlying an ITableModel
+    */
+    class SAL_NO_VTABLE ITableDataSort
+    {
+    public:
+        /** sorts the rows in the model by the given column's data, in the given direction.
+        */
+        virtual void        sortByColumn( ColPos const i_column, ColumnSortDirection const i_sortDirection ) = 0;
+
+        /** retrieves the current sort order of the data
+
+            If the <code>nColumnIndex</code> member of the returned srtructure is <code>COL_INVALID</code>, then
+            the data is currently not sorted.
+        */
+        virtual ColumnSort  getCurrentSortOrder() const = 0;
+
+    protected:
+        ~ITableDataSort() {}
+    };
+
+//......................................................................................................................
+} } // namespace svt::table
+//......................................................................................................................
+
+#endif // SVTOOLS_TABLESORT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */