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dom_misc.h
1 /*
2  * This file is part of the DOM implementation for KDE.
3  *
4  * (C) 1999 Lars Knoll (knoll@kde.org)
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public License
17  * along with this library; see the file COPYING.LIB. If not, write to
18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  *
21  */
22 #ifndef _DOM_RefCountImpl_h_
23 #define _DOM_RefCountImpl_h_
24 
25 #include <tdelibs_export.h>
26 
27 namespace DOM {
28 
29 /*
30  * This implements the reference counting scheme used for all internal
31  * DOM objects.
32  *
33  * Other objects should overload deleteMe() to fit their needs. The default
34  * implementation deletes the object if the ref count drops to 0.
35  */
36 class TDEHTML_EXPORT DomShared
37 {
38 public:
39  DomShared() : _ref( 0 ) {}
40  virtual ~DomShared();
41 
42  /* Overload this function if you want a different deletion behavior
43  */
44  virtual bool deleteMe();
45 
46  void ref() { _ref++; }
47  void deref() { if(_ref) _ref--; if(!_ref && deleteMe()) delete this; }
48  bool hasOneRef() const { return _ref == 1; }
49  unsigned int refCount() const { return _ref; }
50 
51 protected:
52  // the number of DOMObjects referencing this Node
53  // An implementation object will delete itself, if it has
54  // no DOMObject referencing it, and deleteMe() returns true.
55  unsigned int _ref;
56 };
57 
58 } // namespace
59 
60 #endif
DOM
The Document Object Model (DOM) is divided into two parts, the COREDOM core DOM, specifying some core...
Definition: design.h:56

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