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) 2003, 2004, 2005, 2006, 2008, 2012 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
25 #ifndef Attribute_h
26 #define Attribute_h
27
28 #include "core/dom/QualifiedName.h"
29
30 namespace blink {
31
32 // This has no counterpart in DOM.
33 // It is an internal representation of the node value of an Attr.
34 // The actual Attr with its value as a Text child is allocated only if needed.
35 class Attribute {
36 public:
Attribute(const QualifiedName & name,const AtomicString & value)37 Attribute(const QualifiedName& name, const AtomicString& value)
38 : m_name(name)
39 , m_value(value)
40 {
41 }
42
43 // NOTE: The references returned by these functions are only valid for as long
44 // as the Attribute stays in place. For example, calling a function that mutates
45 // an Element's internal attribute storage may invalidate them.
value()46 const AtomicString& value() const { return m_value; }
prefix()47 const AtomicString& prefix() const { return m_name.prefix(); }
localName()48 const AtomicString& localName() const { return m_name.localName(); }
namespaceURI()49 const AtomicString& namespaceURI() const { return m_name.namespaceURI(); }
50
name()51 const QualifiedName& name() const { return m_name; }
52
isEmpty()53 bool isEmpty() const { return m_value.isEmpty(); }
54 bool matches(const QualifiedName&) const;
55
setValue(const AtomicString & value)56 void setValue(const AtomicString& value) { m_value = value; }
setPrefix(const AtomicString & prefix)57 void setPrefix(const AtomicString& prefix) { m_name.setPrefix(prefix); }
58
59 // Note: This API is only for HTMLTreeBuilder. It is not safe to change the
60 // name of an attribute once parseAttribute has been called as DOM
61 // elements may have placed the Attribute in a hash by name.
parserSetName(const QualifiedName & name)62 void parserSetName(const QualifiedName& name) { m_name = name; }
63
64 #if COMPILER(MSVC)
65 // NOTE: This constructor is not actually implemented, it's just defined so MSVC
66 // will let us use a zero-length array of Attributes.
67 Attribute();
68 #endif
69
70 private:
71 QualifiedName m_name;
72 AtomicString m_value;
73 };
74
matches(const QualifiedName & qualifiedName)75 inline bool Attribute::matches(const QualifiedName& qualifiedName) const
76 {
77 if (qualifiedName.localName() != localName())
78 return false;
79 return qualifiedName.prefix() == starAtom || qualifiedName.namespaceURI() == namespaceURI();
80 }
81
82 } // namespace blink
83
84 #endif // Attribute_h
85