Upstream version 5.34.104.0
[platform/framework/web/crosswalk.git] / src / third_party / WebKit / Source / core / dom / QualifiedName.cpp
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 #ifdef SKIP_STATIC_CONSTRUCTORS_ON_GCC
23 #define WEBCORE_QUALIFIEDNAME_HIDE_GLOBALS 1
24 #else
25 #define QNAME_DEFAULT_CONSTRUCTOR
26 #endif
27
28 #include "HTMLNames.h"
29 #include "SVGNames.h"
30 #include "XLinkNames.h"
31 #include "XMLNSNames.h"
32 #include "XMLNames.h"
33 #include "core/dom/QualifiedName.h"
34 #include "wtf/Assertions.h"
35 #include "wtf/HashSet.h"
36 #include "wtf/MainThread.h"
37 #include "wtf/StaticConstructors.h"
38
39 namespace WebCore {
40
41 static const int staticQualifiedNamesCount = HTMLNames::HTMLTagsCount + HTMLNames::HTMLAttrsCount
42     + SVGNames::SVGTagsCount + SVGNames::SVGAttrsCount
43     + XLinkNames::XLinkAttrsCount
44     + XMLNSNames::XMLNSAttrsCount
45     + XMLNames::XMLAttrsCount;
46
47 struct QualifiedNameHashTraits : public HashTraits<QualifiedName::QualifiedNameImpl*> {
48     static const unsigned minimumTableSize = WTF::HashTableCapacityForSize<staticQualifiedNamesCount>::value;
49 };
50
51 typedef HashSet<QualifiedName::QualifiedNameImpl*, QualifiedNameHash, QualifiedNameHashTraits> QualifiedNameCache;
52
53 static QualifiedNameCache& qualifiedNameCache()
54 {
55     // This code is lockless and thus assumes it all runs on one thread!
56     ASSERT(isMainThread());
57     static QualifiedNameCache* gNameCache = new QualifiedNameCache;
58     return *gNameCache;
59 }
60
61 struct QNameComponentsTranslator {
62     static unsigned hash(const QualifiedNameComponents& components)
63     {
64         return hashComponents(components);
65     }
66     static bool equal(QualifiedName::QualifiedNameImpl* name, const QualifiedNameComponents& c)
67     {
68         return c.m_prefix == name->m_prefix.impl() && c.m_localName == name->m_localName.impl() && c.m_namespace == name->m_namespace.impl();
69     }
70     static void translate(QualifiedName::QualifiedNameImpl*& location, const QualifiedNameComponents& components, unsigned)
71     {
72         location = QualifiedName::QualifiedNameImpl::create(AtomicString(components.m_prefix), AtomicString(components.m_localName), AtomicString(components.m_namespace)).leakRef();
73     }
74 };
75
76 QualifiedName::QualifiedName(const AtomicString& p, const AtomicString& l, const AtomicString& n)
77 {
78     QualifiedNameComponents components = { p.impl(), l.impl(), n.isEmpty() ? nullAtom.impl() : n.impl() };
79     QualifiedNameCache::AddResult addResult = qualifiedNameCache().add<QNameComponentsTranslator>(components);
80     m_impl = addResult.isNewEntry ? adoptRef(*addResult.storedValue) : *addResult.storedValue;
81 }
82
83 QualifiedName::~QualifiedName()
84 {
85 }
86
87 QualifiedName::QualifiedNameImpl::~QualifiedNameImpl()
88 {
89     qualifiedNameCache().remove(this);
90 }
91
92 String QualifiedName::toString() const
93 {
94     String local = localName();
95     if (hasPrefix())
96         return prefix().string() + ":" + local;
97     return local;
98 }
99
100 // Global init routines
101 DEFINE_GLOBAL(QualifiedName, anyName, nullAtom, starAtom, starAtom)
102
103 void QualifiedName::init()
104 {
105     ASSERT(starAtom.impl());
106     new ((void*)&anyName) QualifiedName(nullAtom, starAtom, starAtom);
107 }
108
109 const QualifiedName& nullQName()
110 {
111     DEFINE_STATIC_LOCAL(QualifiedName, nullName, (nullAtom, nullAtom, nullAtom));
112     return nullName;
113 }
114
115 const AtomicString& QualifiedName::localNameUpper() const
116 {
117     if (!m_impl->m_localNameUpper)
118         m_impl->m_localNameUpper = m_impl->m_localName.upper();
119     return m_impl->m_localNameUpper;
120 }
121
122 unsigned QualifiedName::QualifiedNameImpl::computeHash() const
123 {
124     QualifiedNameComponents components = { m_prefix.impl(), m_localName.impl(), m_namespace.impl() };
125     return hashComponents(components);
126 }
127
128 void createQualifiedName(void* targetAddress, StringImpl* name, const AtomicString& nameNamespace)
129 {
130     new (targetAddress) QualifiedName(nullAtom, AtomicString(name), nameNamespace);
131 }
132
133 void createQualifiedName(void* targetAddress, StringImpl* name)
134 {
135     new (targetAddress) QualifiedName(nullAtom, AtomicString(name), nullAtom);
136 }
137
138 }