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/SpaceSplitString.h"
29
30namespace WebCore {
31
32using namespace HTMLNames;
33
34ClassList::ClassList(Element* element) : m_element(element) { }
35
36void ClassList::ref()
37{
38    m_element->ref();
39}
40
41void ClassList::deref()
42{
43    m_element->deref();
44}
45
46unsigned ClassList::length() const
47{
48    return m_element->hasClass() ? classNames().size() : 0;
49}
50
51const AtomicString ClassList::item(unsigned index) const
52{
53    if (index >= length())
54        return AtomicString();
55    return classNames()[index];
56}
57
58bool ClassList::containsInternal(const AtomicString& token) const
59{
60    return m_element->hasClass() && classNames().contains(token);
61}
62
63const SpaceSplitString& ClassList::classNames() const
64{
65    ASSERT(m_element->hasClass());
66    if (m_element->document()->inQuirksMode()) {
67        if (!m_classNamesForQuirksMode)
68            m_classNamesForQuirksMode = adoptPtr(new SpaceSplitString(value(), false));
69        return *m_classNamesForQuirksMode.get();
70    }
71    return m_element->elementData()->classNames();
72}
73
74} // namespace WebCore
75