1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 1999 Antti Koivisto (koivisto (at) kde.org) 4 * (C) 2001 Peter Kelly (pmk (at) post.com) 5 * (C) 2001 Dirk Mueller (mueller (at) 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; 35 static AttributeAttrMap& attributeAttrMap() 36 { 37 DEFINE_STATIC_LOCAL(AttributeAttrMap, map, ()); 38 return map; 39 } 40 41 PassRefPtr<Attribute> Attribute::clone() const 42 { 43 return adoptRef(new Attribute(m_name, m_value, m_isMappedAttribute, m_styleDecl.get())); 44 } 45 46 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 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 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 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