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, 2007, 2008, 2009 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 Attr_h
26#define Attr_h
27
28#include "ContainerNode.h"
29#include "Attribute.h"
30
31namespace WebCore {
32
33// Attr can have Text and EntityReference children
34// therefore it has to be a fullblown Node. The plan
35// is to dynamically allocate a textchild and store the
36// resulting nodevalue in the Attribute upon
37// destruction. however, this is not yet implemented.
38
39class Attr : public ContainerNode {
40    friend class NamedNodeMap;
41public:
42    static PassRefPtr<Attr> create(Element*, Document*, PassRefPtr<Attribute>);
43    virtual ~Attr();
44
45    String name() const { return qualifiedName().toString(); }
46    bool specified() const { return m_specified; }
47    Element* ownerElement() const { return m_element; }
48
49    const AtomicString& value() const { return m_attribute->value(); }
50    void setValue(const AtomicString&, ExceptionCode&);
51    void setValue(const AtomicString&);
52
53    Attribute* attr() const { return m_attribute.get(); }
54    const QualifiedName& qualifiedName() const { return m_attribute->name(); }
55
56    bool isId() const;
57
58    // An extension to get presentational information for attributes.
59    CSSStyleDeclaration* style() { return m_attribute->style(); }
60
61    void setSpecified(bool specified) { m_specified = specified; }
62
63private:
64    Attr(Element*, Document*, PassRefPtr<Attribute>);
65
66    void createTextChild();
67
68    virtual String nodeName() const;
69    virtual NodeType nodeType() const;
70
71    const AtomicString& localName() const;
72    const AtomicString& namespaceURI() const;
73    const AtomicString& prefix() const;
74
75    virtual void setPrefix(const AtomicString&, ExceptionCode&);
76
77    virtual String nodeValue() const;
78    virtual void setNodeValue(const String&, ExceptionCode&);
79    virtual PassRefPtr<Node> cloneNode(bool deep);
80
81    virtual bool isAttributeNode() const { return true; }
82    virtual bool childTypeAllowed(NodeType) const;
83
84    virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);
85
86    virtual const AtomicString& virtualPrefix() const { return prefix(); }
87    virtual const AtomicString& virtualLocalName() const { return localName(); }
88    virtual const AtomicString& virtualNamespaceURI() const { return namespaceURI(); }
89
90    Element* m_element;
91    RefPtr<Attribute> m_attribute;
92    unsigned m_ignoreChildrenChanged : 31;
93    bool m_specified : 1;
94};
95
96} // namespace WebCore
97
98#endif // Attr_h
99