Source/WebCore/html/shadow/HTMLShadowElement.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#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