/*
 * Copyright (C) 2015 Apple 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
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * 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
 * 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 HTMLPictureElement_h
#define HTMLPictureElement_h

#include "HTMLElement.h"
#include "MediaQueryEvaluator.h"

namespace WebCore {

class HTMLPictureElement final : public HTMLElement {
public:
    static Ref<HTMLPictureElement> create(const QualifiedName&, Document&);
    ~HTMLPictureElement();

    void sourcesChanged();

    void clearViewportDependentResults() { m_viewportDependentMediaQueryResults.clear(); }
    bool hasViewportDependentResults() const { return m_viewportDependentMediaQueryResults.size(); }
    Vector<std::unique_ptr<MediaQueryResult>>& viewportDependentResults() { return m_viewportDependentMediaQueryResults; }

    void didMoveToNewDocument(Document* oldDocument);
    
    bool viewportChangeAffectedPicture();

    WeakPtr<HTMLPictureElement> createWeakPtr() { return m_weakFactory.createWeakPtr(); }

private:
    HTMLPictureElement(const QualifiedName&, Document&);
    
    WeakPtrFactory<HTMLPictureElement> m_weakFactory { this };
    Vector<std::unique_ptr<MediaQueryResult>> m_viewportDependentMediaQueryResults;

};

} // namespace WebCore

#endif // HTMLPictureElement_h