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1 /*
2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
4  *           (C) 2001 Peter Kelly (pmk@post.com)
5  *           (C) 2001 Dirk Mueller (mueller@kde.org)
6  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Library General Public
10  * License as published by the Free Software Foundation; either
11  * version 2 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Library General Public License for more details.
17  *
18  * You should have received a copy of the GNU Library General Public License
19  * along with this library; see the file COPYING.LIB.  If not, write to
20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21  * Boston, MA 02110-1301, USA.
22  */
23 
24 #include "config.h"
25 #include "Attribute.h"
26 
27 #include "Attr.h"
28 #include "Element.h"
29 #include <wtf/HashMap.h>
30 #include <wtf/UnusedParam.h>
31 
32 namespace WebCore {
33 
34 typedef HashMap<Attribute*, Attr*> AttributeAttrMap;
attributeAttrMap()35 static AttributeAttrMap& attributeAttrMap()
36 {
37     DEFINE_STATIC_LOCAL(AttributeAttrMap, map, ());
38     return map;
39 }
40 
clone() const41 PassRefPtr<Attribute> Attribute::clone() const
42 {
43     return adoptRef(new Attribute(m_name, m_value, m_isMappedAttribute, m_styleDecl.get()));
44 }
45 
attr() const46 Attr* Attribute::attr() const
47 {
48     if (m_hasAttr) {
49         ASSERT(attributeAttrMap().contains(const_cast<Attribute*>(this)));
50         return attributeAttrMap().get(const_cast<Attribute*>(this));
51     }
52 
53     ASSERT(!attributeAttrMap().contains(const_cast<Attribute*>(this)));
54     return 0;
55 }
56 
createAttrIfNeeded(Element * e)57 PassRefPtr<Attr> Attribute::createAttrIfNeeded(Element* e)
58 {
59     RefPtr<Attr> r;
60     if (m_hasAttr) {
61         ASSERT(attributeAttrMap().contains(this));
62         r = attributeAttrMap().get(this);
63     } else {
64         ASSERT(!attributeAttrMap().contains(this));
65         r = Attr::create(e, e->document(), this); // This will end up calling Attribute::bindAttr.
66         ASSERT(attributeAttrMap().contains(this));
67     }
68 
69     return r.release();
70 }
71 
bindAttr(Attr * attr)72 void Attribute::bindAttr(Attr* attr)
73 {
74     ASSERT(!m_hasAttr);
75     ASSERT(!attributeAttrMap().contains(this));
76     attributeAttrMap().set(this, attr);
77     m_hasAttr = true;
78 }
79 
unbindAttr(Attr * attr)80 void Attribute::unbindAttr(Attr* attr)
81 {
82     ASSERT(m_hasAttr);
83     ASSERT(attributeAttrMap().contains(this));
84     ASSERT_UNUSED(attr, attributeAttrMap().get(this) == attr);
85     attributeAttrMap().remove(this);
86     m_hasAttr = false;
87 }
88 
89 } // namespace WebCore
90