ClassList.cpp

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 *
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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#include "config.h"
#include "ClassList.h"

#include "HTMLParserIdioms.h"
#include "SpaceSplitString.h"
#include <wtf/text/StringBuilder.h>

namespace WebCore {

ClassList::ClassList(Element* element)
    : m_element(element)
{
    if (m_element->document()->inQuirksMode())
        m_classNamesForQuirksMode.set(value(), false);
}

void ClassList::ref()
{
    m_element->ref();
}

void ClassList::deref()
{
    m_element->deref();
}

unsigned ClassList::length() const
{
    return m_element->hasClass() ? classNames().size() : 0;
}

const AtomicString ClassList::item(unsigned index) const
{
    if (index >= length())
        return AtomicString();
    return classNames()[index];
}

bool ClassList::containsInternal(const AtomicString& token) const
{
    return m_element->hasClass() && classNames().contains(token);
}

void ClassList::reset(const String& newClassName)
{
    if (m_element->document()->inQuirksMode())
        m_classNamesForQuirksMode.set(newClassName, false);
}

const SpaceSplitString& ClassList::classNames() const
{
    ASSERT(m_element->hasClass());
    if (m_element->document()->inQuirksMode())
        return m_classNamesForQuirksMode;
    return m_element->attributeData()->classNames();
}

} // namespace WebCore