Source/WebCore/dom/DocumentOrShadowRootFullscreen.cpp

/*
 * Copyright (C) 2022 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. AND ITS 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 APPLE INC. OR ITS 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"

#if ENABLE(FULLSCREEN_API)
#include "DocumentOrShadowRootFullscreen.h"

#include "Document.h"
#include "DocumentFullscreen.h"
#include "Element.h"
#include "FrameDestructionObserverInlines.h"
#include "TreeScope.h"

namespace WebCore {

// https://fullscreen.spec.whatwg.org/#dom-document-fullscreenelement
Element* DocumentOrShadowRootFullscreen::fullscreenElement(TreeScope& treeScope)
{
    Ref document = treeScope.documentScope();
    RefPtr documentFullscreen = document->fullscreenIfExists();
    if (!documentFullscreen)
        return nullptr;
    return treeScope.ancestorElementInThisScope(documentFullscreen->protectedFullscreenElement().get());
}

} // namespace WebCore

#endif // ENABLE(FULLSCREEN_API)