blob: 1869c5091209070824a5706074b2d50d1d5e4292 [file] [log] [blame]
* 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.
#include "build/build_config.h"
#include "third_party/blink/renderer/core/dom/qualified_name.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
namespace blink {
// This is the internal representation of an attribute, consisting of a name and
// value. It is distinct from the web-exposed Attr, which also knows of the
// element to which it attached, if any.
class Attribute {
Attribute(const QualifiedName& name, const AtomicString& value)
: name_(name), 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 value_; }
const AtomicString& Prefix() const { return name_.Prefix(); }
const AtomicString& LocalName() const { return name_.LocalName(); }
const AtomicString& NamespaceURI() const { return name_.NamespaceURI(); }
const QualifiedName& GetName() const { return name_; }
bool IsEmpty() const { return value_.IsEmpty(); }
bool Matches(const QualifiedName&) const;
bool MatchesCaseInsensitive(const QualifiedName&) const;
void SetValue(const AtomicString& value) { value_ = value; }
// 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) { name_ = name; }
#if defined(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.
QualifiedName name_;
AtomicString value_;
inline bool Attribute::Matches(const QualifiedName& qualified_name) const {
if (qualified_name.LocalName() != LocalName())
return false;
return qualified_name.Prefix() == g_star_atom ||
qualified_name.NamespaceURI() == NamespaceURI();
inline bool Attribute::MatchesCaseInsensitive(
const QualifiedName& qualified_name) const {
return qualified_name.LocalNameUpper() == name_.LocalNameUpper() &&
(qualified_name.Prefix() == g_star_atom ||
qualified_name.NamespaceURI() == NamespaceURI());
} // namespace blink