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diff --git a/extensions/source/nsplugin/source/so_closelistener.hxx b/extensions/source/nsplugin/source/so_closelistener.hxx
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+++ b/extensions/source/nsplugin/source/so_closelistener.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * $RCSfile: so_closelistener.hxx,v $
+ * $Revision: 1.3 $
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef __SO_CLOSELISTENER_HXX_
+#define __SO_CLOSELISTENER_HXX_
+
+#include <com/sun/star/util/XCloseListener.hpp>
+#include <cppuhelper/implbase1.hxx>
+
+class PluginDocumentClosePreventer : public ::cppu::WeakImplHelper1< ::com::sun::star::util::XCloseListener >
+{
+    sal_Bool m_bPreventClose;
+
+public:
+    PluginDocumentClosePreventer()
+    : m_bPreventClose( sal_True )
+    {}
+
+    void StopPreventClose() { m_bPreventClose = sal_False; }
+
+    virtual void SAL_CALL queryClosing( const ::com::sun::star::lang::EventObject& aEvent, sal_Bool bDeliverOwnership )
+        throw ( ::com::sun::star::uno::RuntimeException, ::com::sun::star::util::CloseVetoException );
+
+    virtual void SAL_CALL notifyClosing( const ::com::sun::star::lang::EventObject& aEvent ) throw ( ::com::sun::star::uno::RuntimeException ) ;
+
+    virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& aEvent ) throw ( ::com::sun::star::uno::RuntimeException ) ;
+};
+
+#endif
+