1 files changed, 87 insertions, 0 deletions
diff --git a/vcl/inc/vcl/impdel.hxx b/vcl/inc/vcl/impdel.hxx
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+++ b/vcl/inc/vcl/impdel.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * 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 _VCL_IMPDEL_HXX
+ #define _VCL_IMPDEL_HXX
+
+ #include <list>
+
+ namespace vcl
+ {
+
+ class DeletionListener;
+
+ class DeletionNotifier
+ {
+     std::list< DeletionListener* > m_aListeners;
+     protected:
+     DeletionNotifier() {}
+
+     ~DeletionNotifier()
+     { notifyDelete(); }
+
+     inline void notifyDelete();
+
+     public:
+     void addDel( DeletionListener* pListener )
+     { m_aListeners.push_back( pListener ); }
+
+     void removeDel( DeletionListener* pListener )
+     { m_aListeners.remove( pListener ); }
+ };
+
+ class DeletionListener
+ {
+     DeletionNotifier*  m_pNotifier;
+     public:
+     DeletionListener( DeletionNotifier* pNotifier )
+     :  m_pNotifier( pNotifier )
+        {
+            if( m_pNotifier )
+                m_pNotifier->addDel( this );
+        }
+    ~DeletionListener()
+    {
+        if( m_pNotifier )
+            m_pNotifier->removeDel( this );
+    }
+    void deleted() { m_pNotifier = NULL; }
+    bool isDeleted() const { return (m_pNotifier == NULL); }
+ };
+
+ inline void DeletionNotifier::notifyDelete()
+ {
+     for( std::list< DeletionListener* >::const_iterator it =
+             m_aListeners.begin(); it != m_aListeners.end(); ++it )
+        (*it)->deleted();
+
+     m_aListeners.clear();
+ }
+
+ } // namespace vcl
+
+ #endif // _VCL_IMPDEL_HXX