Source/WebCore/dom/TagNodeList.cpp

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2001 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "config.h"
#include "TagNodeList.h"

#include "Element.h"
#include "NodeRareData.h"
#include <wtf/Assertions.h>

namespace WebCore {

TagNodeList::TagNodeList(PassRefPtr<Node> rootNode, const AtomicString& namespaceURI, const AtomicString& localName)
    : DynamicSubtreeNodeList(rootNode, TagNodeListType, DoNotInvalidateOnAttributeChanges)
    , m_namespaceURI(namespaceURI)
    , m_localName(localName)
{
    ASSERT(m_namespaceURI.isNull() || !m_namespaceURI.isEmpty());
}

TagNodeList::~TagNodeList()
{
    if (m_namespaceURI == starAtom)
        ownerNode()->nodeLists()->removeCacheWithAtomicName(this, DynamicNodeList::TagNodeListType, m_localName);
    else
        ownerNode()->nodeLists()->removeCacheWithQualifiedName(this, m_namespaceURI, m_localName);
}

bool TagNodeList::nodeMatches(Element* testNode) const
{
    // Implements http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#concept-getelementsbytagnamens
    if (m_localName != starAtom && m_localName != testNode->localName())
        return false;

    return m_namespaceURI == starAtom || m_namespaceURI == testNode->namespaceURI();
}

HTMLTagNodeList::HTMLTagNodeList(PassRefPtr<Node> rootNode, const AtomicString& localName)
    : TagNodeList(rootNode, starAtom, localName)
    , m_loweredLocalName(localName.lower())
{
}

bool HTMLTagNodeList::nodeMatches(Element* testNode) const
{
    // Implements http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#concept-getelementsbytagname
    if (m_localName != starAtom) {
        const AtomicString& localName = testNode->isHTMLElement() ? m_loweredLocalName : m_localName;
        if (localName != testNode->localName())
            return false;
    }

    ASSERT(m_namespaceURI == starAtom);
    return true;
}

} // namespace WebCore