/*
 * Copyright (C) 2011 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.
 *     * 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.
 */

#ifndef ShadowRoot_h
#define ShadowRoot_h

#include "TreeScope.h"

namespace WebCore {

class Document;
class ShadowContentElement;
class ShadowInclusionSelector;

class ShadowRoot : public TreeScope {
public:
    static PassRefPtr<ShadowRoot> create(Document*);

    void recalcShadowTreeStyle(StyleChange);

    ShadowContentElement* includerFor(Node*) const;
    void hostChildrenChanged();

    virtual void attach();

    virtual bool applyAuthorSheets() const;
    void setApplyAuthorSheets(bool);

    ShadowInclusionSelector* inclusions() const;
    ShadowInclusionSelector* ensureInclusions();

private:
    ShadowRoot(Document*);
    virtual ~ShadowRoot();

    virtual String nodeName() const;
    virtual NodeType nodeType() const;
    virtual PassRefPtr<Node> cloneNode(bool deep);
    virtual bool childTypeAllowed(NodeType) const;

    bool hasContentElement() const;

    bool m_applyAuthorSheets;
    OwnPtr<ShadowInclusionSelector> m_inclusions;
};

inline PassRefPtr<ShadowRoot> ShadowRoot::create(Document* document)
{
    return adoptRef(new ShadowRoot(document));
}

inline ShadowRoot* toShadowRoot(Node* node)
{
    ASSERT(!node || node->nodeType() == Node::SHADOW_ROOT_NODE);
    return static_cast<ShadowRoot*>(node);
}

} // namespace

#endif
