/*
 * Copyright (C) 2012 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 THE COPYRIGHT
 * OWNER 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 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "HTMLShadowElement.h"

#include "HTMLNames.h"
#include "ShadowRoot.h"
#include <wtf/text/AtomicString.h>

namespace WebCore {

class Document;

inline HTMLShadowElement::HTMLShadowElement(const QualifiedName& tagName, Document* document)
    : InsertionPoint(tagName, document)
    , m_registeredWithShadowRoot(false)
{
    ASSERT(hasTagName(HTMLNames::shadowTag));
}

PassRefPtr<HTMLShadowElement> HTMLShadowElement::create(const QualifiedName& tagName, Document* document)
{
    return adoptRef(new HTMLShadowElement(tagName, document));
}

HTMLShadowElement::~HTMLShadowElement()
{
}

const AtomicString& HTMLShadowElement::select() const
{
     return nullAtom;
}

Node::InsertionNotificationRequest HTMLShadowElement::insertedInto(ContainerNode* insertionPoint)
{
    InsertionPoint::insertedInto(insertionPoint);

    if (insertionPoint->inDocument() && isActive()) {
        if (ShadowRoot* root = shadowRoot()) {
            root->registerShadowElement();
            m_registeredWithShadowRoot = true;
        }
    }

    return InsertionDone;
}

void HTMLShadowElement::removedFrom(ContainerNode* insertionPoint)
{
    if (insertionPoint->inDocument() && m_registeredWithShadowRoot) {
        ShadowRoot* root = shadowRoot();
        if (!root)
            root = insertionPoint->shadowRoot();
        if (root)
            root->unregisterShadowElement();
        m_registeredWithShadowRoot = false;
    }
    InsertionPoint::removedFrom(insertionPoint);
}

const CSSSelectorList& HTMLShadowElement::emptySelectorList()
{
    DEFINE_STATIC_LOCAL(CSSSelectorList, selectorList, (CSSSelectorList()));
    return selectorList;
}

} // namespace WebCore
