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 30namespace 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. 35class Attribute { 36public: 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. 46 const AtomicString& value() const { return m_value; } 47 const AtomicString& prefix() const { return m_name.prefix(); } 48 const AtomicString& localName() const { return m_name.localName(); } 49 const AtomicString& namespaceURI() const { return m_name.namespaceURI(); } 50 51 const QualifiedName& name() const { return m_name; } 52 53 bool isEmpty() const { return m_value.isEmpty(); } 54 bool matches(const QualifiedName&) const; 55 56 void setValue(const AtomicString& value) { m_value = value; } 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. 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 70private: 71 QualifiedName m_name; 72 AtomicString m_value; 73}; 74 75inline 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