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diff --git a/sw/source/core/inc/DocumentStatisticsManager.hxx b/sw/source/core/inc/DocumentStatisticsManager.hxx
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+++ b/sw/source/core/inc/DocumentStatisticsManager.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_SW_SOURCE_CORE_INC_DOCUMENTSTATISTICSMANAGER_HXX
+#define INCLUDED_SW_SOURCE_CORE_INC_DOCUMENTSTATISTICSMANAGER_HXX
+
+#include <IDocumentStatistics.hxx>
+#include <SwDocIdle.hxx>
+#include <memory>
+
+class SwDoc;
+struct SwDocStat;
+
+namespace sw {
+
+class DocumentStatisticsManager : public IDocumentStatistics
+{
+
+public:
+
+    DocumentStatisticsManager( SwDoc& i_rSwdoc );
+
+    void DocInfoChgd(bool isEnableSetModified) override;
+    const SwDocStat &GetDocStat() const override;
+    void SetDocStatModified(bool bSet);
+    const SwDocStat &GetUpdatedDocStat(bool bCompleteAsync, bool bFields) override;
+    void SetDocStat(const SwDocStat& rStat) override;
+    void UpdateDocStat(bool bCompleteAsync, bool bFields) override;
+    virtual ~DocumentStatisticsManager() override;
+
+private:
+
+    DocumentStatisticsManager(DocumentStatisticsManager const&) = delete;
+    DocumentStatisticsManager& operator=(DocumentStatisticsManager const&) = delete;
+
+    SwDoc& m_rDoc;
+
+    /** continue computing a chunk of document statistics
+      * \param nChars  number of characters to count before exiting
+      * \param bFields if stat. fields should be updated
+      *
+      * returns false when there is no more to calculate
+      */
+    bool IncrementalDocStatCalculate(long nChars, bool bFields = true);
+
+    // Our own 'StatsUpdateTimer' calls the following method
+    DECL_LINK( DoIdleStatsUpdate, Timer *, void );
+
+    std::unique_ptr<SwDocStat> mpDocStat;//< Statistics information
+    bool             mbInitialized;      //< allow first time update
+    SwDocIdle        maStatsUpdateIdle;  //< Idle for asynchronous stats calculation
+};
+
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */