third_party/WebKit/Source/core/dom/Attr.h

   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 "core/CoreExport.h"
  29 #include "core/dom/Node.h"
  30 #include "core/dom/QualifiedName.h"
  31
  32 namespace blink {
  33
  34 class CORE_EXPORT Attr final : public Node {
  35     DEFINE_WRAPPERTYPEINFO();
  36 public:
  37     static PassRefPtrWillBeRawPtr<Attr> create(Element&, const QualifiedName&);
  38     static PassRefPtrWillBeRawPtr<Attr> create(Document&, const QualifiedName&, const AtomicString& value);
  39     ~Attr() override;
  40
  41     String name() const { return m_name.toString(); }
  42     bool specified() const { return true; }
  43     Element* ownerElement() const { return m_element; }
  44
  45     const AtomicString& value() const;
  46     void setValue(const AtomicString&);
  47
  48     const AtomicString& valueForBindings() const;
  49     void setValueForBindings(const AtomicString&);
  50
  51     const QualifiedName qualifiedName() const;
  52
  53     void attachToElement(Element*, const AtomicString&);
  54     void detachFromElementWithValue(const AtomicString&);
  55
  56     const AtomicString& localName() const { return m_name.localName(); }
  57     const AtomicString& namespaceURI() const { return m_name.namespaceURI(); }
  58     const AtomicString& prefix() const { return m_name.prefix(); }
  59
  60     DECLARE_VIRTUAL_TRACE();
  61
  62 private:
  63     Attr(Element&, const QualifiedName&);
  64     Attr(Document&, const QualifiedName&, const AtomicString& value);
  65
  66     bool isElementNode() const = delete; // This will catch anyone doing an unnecessary check.
  67
  68     String nodeName() const override { return name(); }
  69     NodeType nodeType() const override { return ATTRIBUTE_NODE; }
  70
  71     String nodeValue() const override { return value(); }
  72     void setNodeValue(const String&) override;
  73     PassRefPtrWillBeRawPtr<Node> cloneNode(bool deep = true) override;
  74
  75     bool isAttributeNode() const override { return true; }
  76
  77     // Attr wraps either an element/name, or a name/value pair (when it's a standalone Node.)
  78     // Note that m_name is always set, but m_element/m_standaloneValue may be null.
  79     RawPtrWillBeMember<Element> m_element;
  80     QualifiedName m_name;
  81     // Holds the value if it is a standalone Node, or the local name of the
  82     // attribute it is attached to on an Element. The latter may (letter case)
  83     // differ from m_name's local name. As these two modes are non-overlapping,
  84     // use a single field.
  85     AtomicString m_standaloneValueOrAttachedLocalName;
  86 };
  87
  88 DEFINE_NODE_TYPE_CASTS(Attr, isAttributeNode());
  89
  90 } // namespace blink
  91
  92 #endif // Attr_h