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diff --git a/sw/inc/SwDocIdle.hxx b/sw/inc/SwDocIdle.hxx
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+++ b/sw/inc/SwDocIdle.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_INC_SWDOCIDLE_HXX
+#define INCLUDED_SW_INC_SWDOCIDLE_HXX
+
+#include <vcl/idle.hxx>
+
+class SwDoc;
+
+namespace sw
+{
+/**
+ * An Idle, which is just ready to be scheduled for idle documents.
+ *
+ * Currently it's missing the notification, when busy documents become idle
+ * again, so it relies on any task being triggered to recheck, which is
+ * quite probably not a problem, as busy documents have a high chance to have
+ * generated idle tasks.
+ */
+class SwDocIdle final : public Idle
+{
+private:
+    SwDoc& m_rDoc;
+
+    virtual sal_uInt64 UpdateMinPeriod(sal_uInt64 nTimeNow) const override;
+
+public:
+    SwDocIdle(SwDoc& doc, const char* pDebugIdleName);
+    virtual ~SwDocIdle() override;
+};
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */