1/* 2 * Copyright (C) 2005, 2006, 2009 Apple Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20#include "config.h" 21 22#include "core/dom/QualifiedName.h" 23 24#include "core/HTMLNames.h" 25#include "core/MathMLNames.h" 26#include "core/SVGNames.h" 27#include "core/XLinkNames.h" 28#include "core/XMLNSNames.h" 29#include "core/XMLNames.h" 30#include "wtf/Assertions.h" 31#include "wtf/HashSet.h" 32#include "wtf/MainThread.h" 33#include "wtf/StaticConstructors.h" 34 35namespace blink { 36 37struct SameSizeAsQualifiedNameImpl : public RefCounted<SameSizeAsQualifiedNameImpl> { 38 unsigned bitfield; 39 void* pointers[4]; 40}; 41 42COMPILE_ASSERT(sizeof(QualifiedName::QualifiedNameImpl) == sizeof(SameSizeAsQualifiedNameImpl), qualified_name_impl_should_stay_small); 43 44static const int staticQualifiedNamesCount = HTMLNames::HTMLTagsCount + HTMLNames::HTMLAttrsCount 45 + MathMLNames::MathMLTagsCount + MathMLNames::MathMLAttrsCount 46 + SVGNames::SVGTagsCount + SVGNames::SVGAttrsCount 47 + XLinkNames::XLinkAttrsCount 48 + XMLNSNames::XMLNSAttrsCount 49 + XMLNames::XMLAttrsCount; 50 51struct QualifiedNameHashTraits : public HashTraits<QualifiedName::QualifiedNameImpl*> { 52 static const unsigned minimumTableSize = WTF::HashTableCapacityForSize<staticQualifiedNamesCount>::value; 53}; 54 55typedef HashSet<QualifiedName::QualifiedNameImpl*, QualifiedNameHash, QualifiedNameHashTraits> QualifiedNameCache; 56 57static QualifiedNameCache& qualifiedNameCache() 58{ 59 // This code is lockless and thus assumes it all runs on one thread! 60 ASSERT(isMainThread()); 61 static QualifiedNameCache* gNameCache = new QualifiedNameCache; 62 return *gNameCache; 63} 64 65struct QNameComponentsTranslator { 66 static unsigned hash(const QualifiedNameData& data) 67 { 68 return hashComponents(data.m_components); 69 } 70 static bool equal(QualifiedName::QualifiedNameImpl* name, const QualifiedNameData& data) 71 { 72 return data.m_components.m_prefix == name->m_prefix.impl() 73 && data.m_components.m_localName == name->m_localName.impl() 74 && data.m_components.m_namespace == name->m_namespace.impl(); 75 } 76 static void translate(QualifiedName::QualifiedNameImpl*& location, const QualifiedNameData& data, unsigned) 77 { 78 const QualifiedNameComponents& components = data.m_components; 79 location = QualifiedName::QualifiedNameImpl::create(AtomicString(components.m_prefix), AtomicString(components.m_localName), AtomicString(components.m_namespace), data.m_isStatic).leakRef(); 80 } 81}; 82 83QualifiedName::QualifiedName(const AtomicString& p, const AtomicString& l, const AtomicString& n) 84{ 85 QualifiedNameData data = { { p.impl(), l.impl(), n.isEmpty() ? nullAtom.impl() : n.impl() }, false }; 86 QualifiedNameCache::AddResult addResult = qualifiedNameCache().add<QNameComponentsTranslator>(data); 87 m_impl = addResult.isNewEntry ? adoptRef(*addResult.storedValue) : *addResult.storedValue; 88} 89 90QualifiedName::QualifiedName(const AtomicString& p, const AtomicString& l, const AtomicString& n, bool isStatic) 91{ 92 QualifiedNameData data = { { p.impl(), l.impl(), n.impl() }, isStatic }; 93 QualifiedNameCache::AddResult addResult = qualifiedNameCache().add<QNameComponentsTranslator>(data); 94 m_impl = addResult.isNewEntry ? adoptRef(*addResult.storedValue) : *addResult.storedValue; 95} 96 97QualifiedName::~QualifiedName() 98{ 99} 100 101QualifiedName::QualifiedNameImpl::~QualifiedNameImpl() 102{ 103 qualifiedNameCache().remove(this); 104} 105 106String QualifiedName::toString() const 107{ 108 String local = localName(); 109 if (hasPrefix()) 110 return prefix().string() + ":" + local; 111 return local; 112} 113 114// Global init routines 115DEFINE_GLOBAL(QualifiedName, anyName, nullAtom, starAtom, starAtom) 116 117void QualifiedName::init() 118{ 119 ASSERT(starAtom.impl()); 120 new ((void*)&anyName) QualifiedName(nullAtom, starAtom, starAtom, true ); 121} 122 123const QualifiedName& QualifiedName::null() 124{ 125 DEFINE_STATIC_LOCAL(QualifiedName, nullName, (nullAtom, nullAtom, nullAtom, true)); 126 return nullName; 127} 128 129const AtomicString& QualifiedName::localNameUpper() const 130{ 131 if (!m_impl->m_localNameUpper) 132 m_impl->m_localNameUpper = m_impl->m_localName.upper(); 133 return m_impl->m_localNameUpper; 134} 135 136unsigned QualifiedName::QualifiedNameImpl::computeHash() const 137{ 138 QualifiedNameComponents components = { m_prefix.impl(), m_localName.impl(), m_namespace.impl() }; 139 return hashComponents(components); 140} 141 142void QualifiedName::createStatic(void* targetAddress, StringImpl* name, const AtomicString& nameNamespace) 143{ 144 new (targetAddress) QualifiedName(nullAtom, AtomicString(name), nameNamespace, true); 145} 146 147void QualifiedName::createStatic(void* targetAddress, StringImpl* name) 148{ 149 new (targetAddress) QualifiedName(nullAtom, AtomicString(name), nullAtom, true); 150} 151 152} 153