third_party/WebKit/Source/core/dom/DOMStringList.cpp

/*
 * Copyright (C) 2010 Google Inc. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * 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
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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#include "core/dom/DOMStringList.h"

#include "core/dom/ExecutionContext.h"
#include "core/frame/UseCounter.h"
#include <algorithm>

namespace blink {

String DOMStringList::anonymousIndexedGetter(unsigned index) const
{
    if (index >= m_strings.size())
        return String();
    return m_strings[index];
}


String DOMStringList::item(ExecutionContext* context, unsigned index) const
{
    switch (m_source) {
    case DOMStringList::IndexedDB:
        UseCounter::count(context, UseCounter::DOMStringList_Item_AttributeGetter_IndexedDB);
        break;
    case DOMStringList::Location:
        UseCounter::count(context, UseCounter::DOMStringList_Item_AttributeGetter_Location);
        break;
    default:
        ASSERT_NOT_REACHED();
    }

    return anonymousIndexedGetter(index);
}

bool DOMStringList::contains(ExecutionContext* context, const String& string) const
{
    switch (m_source) {
    case DOMStringList::IndexedDB:
        UseCounter::count(context, UseCounter::DOMStringList_Contains_Method_IndexedDB);
        break;
    case DOMStringList::Location:
        UseCounter::count(context, UseCounter::DOMStringList_Contains_Method_Location);
        break;
    default:
        ASSERT_NOT_REACHED();
    }

    // FIXME: Currently, all consumers of DOMStringList store fairly small lists and thus an O(n)
    //        algorithm is OK.  But this may need to be optimized if larger amounts of data are
    //        stored in m_strings.
    size_t count = m_strings.size();
    for (size_t i = 0; i < count; ++i) {
        if (m_strings[i] == string)
            return true;
    }
    return false;
}

void DOMStringList::sort()
{
    std::sort(m_strings.begin(), m_strings.end(), WTF::codePointCompareLessThan);
}

} // namespace blink