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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2001 Peter Kelly (pmk@post.com)
* (C) 2001 Dirk Mueller (mueller@kde.org)
* 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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* 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 "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 {
public:
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 AtomicString& prefix, const AtomicString& localName, const AtomicString& namespaceURI) 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; }
#if COMPILER(MSVC) || COMPILER(CLANG)
// NOTE: This constructor is not actually used, it's just defined so MSVC (or clang)
// will let us use a zero-length array of Attributes.
Attribute() : m_name(WTF::HashTableDeletedValue)
{
ASSERT_NOT_REACHED();
}
#endif
private:
QualifiedName m_name;
AtomicString m_value;
};
inline bool Attribute::matches(const AtomicString& prefix, const AtomicString& localName, const AtomicString& namespaceURI) const
{
if (localName != this->localName())
return false;
return prefix == starAtom || namespaceURI == this->namespaceURI();
}
} // namespace WebCore
#endif // Attribute_h
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