1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef CustomElementDescriptor_h
32#define CustomElementDescriptor_h
33
34#include "platform/heap/Handle.h"
35#include "wtf/HashTableDeletedValueType.h"
36#include "wtf/text/AtomicString.h"
37
38namespace blink {
39
40struct CustomElementDescriptorHash;
41
42// A Custom Element descriptor is everything necessary to match a
43// Custom Element instance to a definition.
44class CustomElementDescriptor {
45    ALLOW_ONLY_INLINE_ALLOCATION();
46public:
47    CustomElementDescriptor(const AtomicString& type, const AtomicString& namespaceURI, const AtomicString& localName)
48        : m_type(type)
49        , m_namespaceURI(namespaceURI)
50        , m_localName(localName)
51    {
52    }
53
54    ~CustomElementDescriptor() { }
55
56    // Specifies whether the custom element is in the HTML or SVG
57    // namespace.
58    const AtomicString& namespaceURI() const { return m_namespaceURI; }
59
60    // The tag name.
61    const AtomicString& localName() const { return m_localName; }
62
63    // The name of the definition. For custom tags, this is the tag
64    // name and the same as "localName". For type extensions, this is
65    // the value of the "is" attribute.
66    const AtomicString& type() const { return m_type; }
67
68    bool isTypeExtension() const { return m_type != m_localName; }
69
70    // Stuff for hashing.
71
72    CustomElementDescriptor() { }
73    explicit CustomElementDescriptor(WTF::HashTableDeletedValueType value)
74        : m_type(value) { }
75    bool isHashTableDeletedValue() const { return m_type.isHashTableDeletedValue(); }
76
77    bool operator==(const CustomElementDescriptor& other) const
78    {
79        return m_type == other.m_type
80            && m_localName == other.m_localName
81            && m_namespaceURI == other.m_namespaceURI;
82    }
83
84private:
85    AtomicString m_type;
86    AtomicString m_namespaceURI;
87    AtomicString m_localName;
88};
89
90} // namespace blink
91
92namespace WTF {
93
94template<typename T> struct DefaultHash;
95template<> struct DefaultHash<blink::CustomElementDescriptor> {
96    typedef blink::CustomElementDescriptorHash Hash;
97};
98
99} // namespace WTF
100
101#endif // CustomElementDescriptor_h
102