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 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 "CSSMappedAttributeDeclaration.h"

    29 #include "QualifiedName.h"

    30 

    31 namespace WebCore {

    32 

    33 class Attr;

    34 class CSSStyleDeclaration;

    35 class Element;

    36 class NamedNodeMap;

    37 

    38 // This has no counterpart in DOM.

    39 // It is an internal representation of the node value of an Attr.

    40 // The actual Attr with its value as a Text child is allocated only if needed.

    41 class Attribute : public RefCounted<Attribute> {

    42     friend class Attr;

    43     friend class NamedNodeMap;

    44 public:

    45     static PassRefPtr<Attribute> create(const QualifiedName& name, const AtomicString& value)

    46     {

    47         return adoptRef(new Attribute(name, value, false, 0));

    48     }

    49     static PassRefPtr<Attribute> createMapped(const QualifiedName& name, const AtomicString& value)

    50     {

    51         return adoptRef(new Attribute(name, value, true, 0));

    52     }

    53     static PassRefPtr<Attribute> createMapped(const AtomicString& name, const AtomicString& value)

    54     {

    55         return adoptRef(new Attribute(name, value, true, 0));

    56     }

    57 

    58     const AtomicString& value() const { return m_value; }

    59     const AtomicString& prefix() const { return m_name.prefix(); }

    60     const AtomicString& localName() const { return m_name.localName(); }

    61     const AtomicString& namespaceURI() const { return m_name.namespaceURI(); }

    62     

    63     const QualifiedName& name() const { return m_name; }

    64     

    65     Attr* attr() const;

    66     PassRefPtr<Attr> createAttrIfNeeded(Element*);

    67 

    68     bool isNull() const { return m_value.isNull(); }

    69     bool isEmpty() const { return m_value.isEmpty(); }

    70     

    71     PassRefPtr<Attribute> clone() const;

    72 

    73     // An extension to get the style information for presentational attributes.

    74     CSSStyleDeclaration* style() const { return m_styleDecl.get(); }

    75     CSSMappedAttributeDeclaration* decl() const { return m_styleDecl.get(); }

    76     void setDecl(PassRefPtr<CSSMappedAttributeDeclaration> decl) { m_styleDecl = decl; }

    77 

    78     void setValue(const AtomicString& value) { m_value = value; }

    79     void setPrefix(const AtomicString& prefix) { m_name.setPrefix(prefix); }

    80 

    81     // Note: This API is only for HTMLTreeBuilder.  It is not safe to change the

    82     // name of an attribute once parseMappedAttribute has been called as DOM

    83     // elements may have placed the Attribute in a hash by name.

    84     void parserSetName(const QualifiedName& name) { m_name = name; }

    85 

    86     bool isMappedAttribute() { return m_isMappedAttribute; }

    87 

    88 private:

    89     Attribute(const QualifiedName& name, const AtomicString& value, bool isMappedAttribute, CSSMappedAttributeDeclaration* styleDecl)

    90         : m_isMappedAttribute(isMappedAttribute)

    91         , m_hasAttr(false)

    92         , m_name(name)

    93         , m_value(value)

    94         , m_styleDecl(styleDecl)

    95     {

    96     }

    97 

    98     Attribute(const AtomicString& name, const AtomicString& value, bool isMappedAttribute, CSSMappedAttributeDeclaration* styleDecl)

    99         : m_isMappedAttribute(isMappedAttribute)

   100         , m_hasAttr(false)

   101         , m_name(nullAtom, name, nullAtom)

   102         , m_value(value)

   103         , m_styleDecl(styleDecl)

   104     {

   105     }

   106 

   107     void bindAttr(Attr*);

   108     void unbindAttr(Attr*);

   109 

   110     // These booleans will go into the spare 32-bits of padding from RefCounted in 64-bit.

   111     bool m_isMappedAttribute;

   112     bool m_hasAttr;

   113     

   114     QualifiedName m_name;

   115     AtomicString m_value;

   116     RefPtr<CSSMappedAttributeDeclaration> m_styleDecl;

   117 };

   118 

   119 } // namespace WebCore

   120 

   121 #endif // Attribute_h