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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, 2014 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.
*
*/
#pragma once
#include "CommonAtomStrings.h"
#include "QualifiedName.h"
#include <wtf/Hasher.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 AtomString& 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 AtomString& value() const { return m_value; }
static constexpr ptrdiff_t valueMemoryOffset() { return OBJECT_OFFSETOF(Attribute, m_value); }
const AtomString& prefix() const { return m_name.prefix(); }
const AtomString& localName() const { return m_name.localName(); }
const AtomString& localNameLowercase() const { return m_name.localNameLowercase(); }
const AtomString& namespaceURI() const { return m_name.namespaceURI(); }
const QualifiedName& name() const { return m_name; }
static constexpr ptrdiff_t nameMemoryOffset() { return OBJECT_OFFSETOF(Attribute, m_name); }
bool isEmpty() const { return m_value.isEmpty(); }
static bool nameMatchesFilter(const QualifiedName&, const AtomString& filterPrefix, const AtomString& filterLocalName, const AtomString& filterNamespaceURI);
bool matches(const AtomString& prefix, const AtomString& localName, const AtomString& namespaceURI) const;
void setValue(const AtomString& value) { m_value = value; }
void setPrefix(const AtomString& 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)
// NOTE: This constructor is not actually implemented, it's just defined so MSVC
// will let us use a zero-length array of Attributes.
Attribute();
#endif
private:
QualifiedName m_name;
AtomString m_value;
};
inline void add(Hasher& hasher, const Attribute& attribute)
{
add(hasher, attribute.name(), attribute.value());
}
inline bool Attribute::nameMatchesFilter(const QualifiedName& name, const AtomString& filterPrefix, const AtomString& filterLocalName, const AtomString& filterNamespaceURI)
{
if (filterLocalName != name.localName())
return false;
return filterPrefix == starAtom() || filterNamespaceURI == name.namespaceURI();
}
inline bool Attribute::matches(const AtomString& prefix, const AtomString& localName, const AtomString& namespaceURI) const
{
return nameMatchesFilter(m_name, prefix, localName, namespaceURI);
}
} // namespace WebCore
namespace WTF {
template<>
struct VectorTraits<WebCore::Attribute> : SimpleClassVectorTraits { };
} // namespace WTF
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