1/*
2 * Copyright (C) 2010 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
6 * are met:
7 * 1.  Redistributions of source code must retain the above copyright
8 *     notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 *     notice, this list of conditions and the following disclaimer in the
11 *     documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "config.h"
26#include "core/html/ClassList.h"
27
28#include "core/dom/Document.h"
29
30namespace blink {
31
32using namespace HTMLNames;
33
34ClassList::ClassList(Element* element) : m_element(element) { }
35
36#if !ENABLE(OILPAN)
37void ClassList::ref()
38{
39    m_element->ref();
40}
41
42void ClassList::deref()
43{
44    m_element->deref();
45}
46#endif
47
48unsigned ClassList::length() const
49{
50    return m_element->hasClass() ? classNames().size() : 0;
51}
52
53const AtomicString ClassList::item(unsigned index) const
54{
55    if (index >= length())
56        return AtomicString();
57    return classNames()[index];
58}
59
60bool ClassList::containsInternal(const AtomicString& token) const
61{
62    return m_element->hasClass() && classNames().contains(token);
63}
64
65const SpaceSplitString& ClassList::classNames() const
66{
67    ASSERT(m_element->hasClass());
68    if (m_element->document().inQuirksMode()) {
69        if (!m_classNamesForQuirksMode)
70            m_classNamesForQuirksMode = adoptPtr(new SpaceSplitString(value(), false));
71        return *m_classNamesForQuirksMode.get();
72    }
73    return m_element->classNames();
74}
75
76void ClassList::trace(Visitor* visitor)
77{
78    visitor->trace(m_element);
79    DOMTokenList::trace(visitor);
80}
81
82} // namespace blink
83