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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2001 Peter Kelly (pmk (at) post.com)
      5  *           (C) 2001 Dirk Mueller (mueller (at) 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 
     31 namespace 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 
     39 class Attr : public ContainerNode {
     40     friend class NamedNodeMap;
     41 public:
     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 
     63 private:
     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