Source/core/html/track/TextTrackRegion.h

/*
 * Copyright (C) 2013 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.
 *     * 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.
 *     * 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,
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 */

#ifndef TextTrackRegion_h
#define TextTrackRegion_h

#if ENABLE(WEBVTT_REGIONS)

#include "core/html/track/TextTrack.h"
#include "core/platform/graphics/FloatPoint.h"
#include <wtf/PassOwnPtr.h>
#include <wtf/RefCounted.h>

namespace WebCore {

class TextTrackRegion : public RefCounted<TextTrackRegion> {
public:
    static PassRefPtr<TextTrackRegion> create()
    {
        return adoptRef(new TextTrackRegion());
    }

    virtual ~TextTrackRegion();

    TextTrack* track() const { return m_track; }
    void setTrack(TextTrack*);

    const String& id() const { return m_id; }
    void setId(const String&);

    double width() const { return m_width; }
    void setWidth(double, ExceptionCode&);

    long height() const { return m_heightInLines; }
    void setHeight(long, ExceptionCode&);

    double regionAnchorX() const { return m_regionAnchor.x(); }
    void setRegionAnchorX(double, ExceptionCode&);

    double regionAnchorY() const { return m_regionAnchor.y(); }
    void setRegionAnchorY(double, ExceptionCode&);

    double viewportAnchorX() const { return m_viewportAnchor.x(); }
    void setViewportAnchorX(double, ExceptionCode&);

    double viewportAnchorY() const { return m_viewportAnchor.y(); }
    void setViewportAnchorY(double, ExceptionCode&);

    const AtomicString scroll() const;
    void setScroll(const AtomicString&, ExceptionCode&);

    void updateParametersFromRegion(TextTrackRegion*);

    const String& regionSettings() const { return m_settings; }
    void setRegionSettings(const String&);

private:
    TextTrackRegion();

    enum RegionSetting {
        None,
        Id,
        Width,
        Height,
        RegionAnchor,
        ViewportAnchor,
        Scroll
    };

    RegionSetting getSettingFromString(const String&);

    void parseSettingValue(RegionSetting, const String&);
    void parseSetting(const String&, unsigned*);

    String m_id;
    String m_settings;

    double m_width;
    unsigned m_heightInLines;

    FloatPoint m_regionAnchor;
    FloatPoint m_viewportAnchor;

    bool m_scroll;

    // The member variable track can be a raw pointer as it will never
    // reference a destroyed TextTrack, as this member variable
    // is cleared in the TextTrack destructor and it is generally
    // set/reset within the addRegion and removeRegion methods.
    TextTrack* m_track;
};

} // namespace WebCore

#endif
#endif