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dom_misc.h
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1/*
2 * This file is part of the DOM implementation for KDE.
3 *
4 * Copyright 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 <khtml_export.h>
26
27namespace 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 */
36class KHTML_EXPORT DomShared
37{
38public:
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
51protected:
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::DomShared
Definition: dom_misc.h:37
DOM::DomShared::refCount
unsigned int refCount() const
Definition: dom_misc.h:49
DOM::DomShared::deref
void deref()
Definition: dom_misc.h:47
DOM::DomShared::ref
void ref()
Definition: dom_misc.h:46
DOM::DomShared::_ref
unsigned int _ref
Definition: dom_misc.h:55
DOM::DomShared::hasOneRef
bool hasOneRef() const
Definition: dom_misc.h:48
DOM::DomShared::DomShared
DomShared()
Definition: dom_misc.h:39
khtml_export.h
DOM
This library provides a full-featured HTML parser and widget.
Definition: design.h:55
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