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diff --git a/sw/inc/IDocumentStatistics.hxx b/sw/inc/IDocumentStatistics.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 .
+ */
+
+#pragma once
+
+struct SwDocStat;
+
+/** Document statistics information
+ */
+class IDocumentStatistics
+{
+public:
+    /** DocInfo has changed (notify via DocShell):
+        make required fields update.
+    */
+    virtual void DocInfoChgd(bool isEnableSetModified) = 0;
+
+    /** Document - Statistics
+    */
+    /// Returns a reference to the existing document statistics
+    virtual const SwDocStat& GetDocStat() const = 0;
+
+    /**
+      * Updates the document statistics if the document has been
+      * modified and returns a reference to the result.
+      * \param bCompleteAsync if true will return a partial result,
+      * and potentially trigger a timeout to complete the work.
+      * \param bFields if stat. fields should be updated
+      */
+    virtual const SwDocStat& GetUpdatedDocStat(bool bCompleteAsync, bool bFields) = 0;
+
+    /// Set the document statistics
+    virtual void SetDocStat(const SwDocStat& rStat) = 0;
+
+    /**
+      * Updates the internal document's statistics
+      * \param bCompleteAsync if true it may do part of the
+      * work and trigger a timeout to complete it.
+      * \param bFields if stat. fields should be updated
+      */
+    virtual void UpdateDocStat(bool bCompleteAsync, bool bFields) = 0;
+
+protected:
+    virtual ~IDocumentStatistics(){};
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */