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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
+
+#include <rtl/ref.hxx>
+#include <tools/link.hxx>
+#include <memory>
+
+namespace sd
+{
+class SlideShow;
+}
+namespace sd
+{
+class ViewShellBase;
+}
+class SfxDispatcher;
+struct ImplSVEvent;
+
+namespace sd
+{
+/** This class is used when a display is removed or added to restart the
+ slide show. This is necessary at least with DirectX because
+ deactivating a display invalidates DirectX resources. Accessing those
+ leads to a crash.
+
+ During a restart a possibly installed presenter extension is given the
+ opportunity to show or hide depending on the number of available displays.
+*/
+class SlideShowRestarter : public std::enable_shared_from_this<SlideShowRestarter>
+{
+public:
+ /** Create a new SlideShowRestarter object.
+ @param rpSlideShow
+ The slide show is used to determine the current slide, which is
+ restored after the restart, and of course to stop and start the
+ slide show.
+ @param pViewShellBase
+ Used to get access to a slot dispatcher.
+ */
+ SlideShowRestarter(const ::rtl::Reference<SlideShow>& rpSlideShow,
+ ViewShellBase* pViewShellBase);
+ virtual ~SlideShowRestarter();
+
+ /** Restarting the slide show is an asynchronous multi step process
+ which is started by calling this method.
+ @param bForce
+ Used to force a re-start, even if the display count is unchanged.
+ */
+ void Restart(bool bForce);
+
+private:
+ ImplSVEvent* mnEventId;
+ ::rtl::Reference<SlideShow> mpSlideShow;
+ ViewShellBase* mpViewShellBase;
+ ::std::shared_ptr<SlideShowRestarter> mpSelf;
+ sal_Int32 mnDisplayCount;
+ SfxDispatcher* mpDispatcher;
+ sal_Int32 mnCurrentSlideNumber;
+
+ DECL_LINK(EndPresentation, void*, void);
+
+ /** Restart the presentation on the slide last shown before the restart
+ was initiated.
+ */
+ void StartPresentation();
+};
+
+} // end of namespace sd
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */