/*
 * Copyright (C) 2008 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 PageGroup_h
#define PageGroup_h

#include "Supplementable.h"
#include <wtf/HashSet.h>
#include <wtf/Noncopyable.h>
#include <wtf/text/WTFString.h>

namespace WebCore {

    class Page;
#if ENABLE(VIDEO_TRACK)
    class CaptionUserPreferences;
#endif

    class PageGroup {
        WTF_MAKE_NONCOPYABLE(PageGroup); WTF_MAKE_FAST_ALLOCATED;
    public:
        WEBCORE_EXPORT explicit PageGroup(const String& name);
        explicit PageGroup(Page&);
        ~PageGroup();

        WEBCORE_EXPORT static PageGroup* pageGroup(const String& groupName);

        const HashSet<Page*>& pages() const { return m_pages; }

        void addPage(Page&);
        void removePage(Page&);

        const String& name() { return m_name; }
        unsigned identifier() { return m_identifier; }

#if ENABLE(VIDEO_TRACK)
        WEBCORE_EXPORT void captionPreferencesChanged();
        WEBCORE_EXPORT CaptionUserPreferences* captionPreferences();
#endif

    private:
        String m_name;
        HashSet<Page*> m_pages;

        unsigned m_identifier;

#if ENABLE(VIDEO_TRACK)
        std::unique_ptr<CaptionUserPreferences> m_captionPreferences;
#endif
    };

} // namespace WebCore
    
#endif // PageGroup_h
