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diff --git a/sw/inc/IDocumentTimerAccess.hxx b/sw/inc/IDocumentTimerAccess.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_IDOCUMENTTIMERACCESS_HXX
+#define INCLUDED_SW_INC_IDOCUMENTTIMERACCESS_HXX
+
+/**
+ * Handle the background jobs of a Writer document.
+ *
+ * Initially it's disabled and unblocked.
+ *
+ * Jobs include:
+ *  * grammar checking
+ *  * field updating
+ *  * document layouting
+ */
+class IDocumentTimerAccess
+{
+public:
+    /**
+     * Start the idle task.
+     *
+     * Depends on the block count and various document states.
+     */
+    virtual void StartIdling() = 0;
+
+    /**
+     * Stop idle processing.
+     */
+    virtual void StopIdling() = 0;
+
+    /**
+     * Increment block count.
+     *
+     * Prevents further background idle processing.
+     * This doesn't guarantee the Idle task is not currently running!
+     */
+    virtual void BlockIdling() = 0;
+
+    /**
+     * Decrement block count.
+     *
+     * May re-start the idle task, if active.
+     */
+    virtual void UnblockIdling() = 0;
+
+    /**
+     * Is the document ready to be processed?
+     */
+    virtual bool IsDocIdle() const = 0;
+
+protected:
+    virtual ~IDocumentTimerAccess() {};
+};
+
+#endif // INCLUDED_SW_INC_IDOCUMENTTIMERACCESS_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */