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* Copyright (C) 1999 Lars Knoll (
* (C) 1999 Antti Koivisto (
* (C) 2001 Peter Kelly (
* (C) 2001 Dirk Mueller (
* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
#ifndef Attribute_h
#define Attribute_h
#include "core/dom/QualifiedName.h"
namespace WebCore {
// This has no counterpart in DOM.
// It is an internal representation of the node value of an Attr.
// The actual Attr with its value as a Text child is allocated only if needed.
class Attribute {
Attribute(const QualifiedName& name, const AtomicString& value)
: m_name(name)
, m_value(value)
// NOTE: The references returned by these functions are only valid for as long
// as the Attribute stays in place. For example, calling a function that mutates
// an Element's internal attribute storage may invalidate them.
const AtomicString& value() const { return m_value; }
const AtomicString& prefix() const { return m_name.prefix(); }
const AtomicString& localName() const { return m_name.localName(); }
const AtomicString& namespaceURI() const { return m_name.namespaceURI(); }
const QualifiedName& name() const { return m_name; }
bool isEmpty() const { return m_value.isEmpty(); }
bool matches(const QualifiedName&) const;
void setValue(const AtomicString& value) { m_value = value; }
void setPrefix(const AtomicString& prefix) { m_name.setPrefix(prefix); }
// Note: This API is only for HTMLTreeBuilder. It is not safe to change the
// name of an attribute once parseAttribute has been called as DOM
// elements may have placed the Attribute in a hash by name.
void parserSetName(const QualifiedName& name) { m_name = name; }
// NOTE: This constructor is not actually implemented, it's just defined so MSVC
// will let us use a zero-length array of Attributes.
QualifiedName m_name;
AtomicString m_value;
inline bool Attribute::matches(const QualifiedName& qualifiedName) const
if (qualifiedName.localName() != localName())
return false;
return qualifiedName.prefix() == starAtom || qualifiedName.namespaceURI() == namespaceURI();
} // namespace WebCore
#endif // Attribute_h