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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef _VCL_IMPDEL_HXX
21 : #define _VCL_IMPDEL_HXX
22 :
23 : #include <list>
24 :
25 : namespace vcl
26 : {
27 :
28 : class DeletionListener;
29 :
30 : class DeletionNotifier
31 : {
32 : std::list< DeletionListener* > m_aListeners;
33 : protected:
34 267 : DeletionNotifier() {}
35 :
36 67 : ~DeletionNotifier()
37 67 : { notifyDelete(); }
38 :
39 : inline void notifyDelete();
40 :
41 : public:
42 0 : void addDel( DeletionListener* pListener )
43 0 : { m_aListeners.push_back( pListener ); }
44 :
45 0 : void removeDel( DeletionListener* pListener )
46 0 : { m_aListeners.remove( pListener ); }
47 : };
48 :
49 : class DeletionListener
50 : {
51 : DeletionNotifier* m_pNotifier;
52 : public:
53 0 : DeletionListener( DeletionNotifier* pNotifier )
54 0 : : m_pNotifier( pNotifier )
55 : {
56 0 : if( m_pNotifier )
57 0 : m_pNotifier->addDel( this );
58 0 : }
59 0 : ~DeletionListener()
60 : {
61 0 : if( m_pNotifier )
62 0 : m_pNotifier->removeDel( this );
63 0 : }
64 0 : void deleted() { m_pNotifier = NULL; }
65 0 : bool isDeleted() const { return (m_pNotifier == NULL); }
66 : };
67 :
68 67 : inline void DeletionNotifier::notifyDelete()
69 : {
70 201 : for( std::list< DeletionListener* >::const_iterator it =
71 201 : m_aListeners.begin(); it != m_aListeners.end(); ++it )
72 0 : (*it)->deleted();
73 :
74 67 : m_aListeners.clear();
75 67 : }
76 :
77 : } // namespace vcl
78 :
79 : #endif // _VCL_IMPDEL_HXX
80 :
81 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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