Source/WebCore/rendering/RenderVTTCue.h

/*
 * Copyright (C) 2012 Victor Carbune (victor@rosedu.org)
 *
 * 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. 
 */

#pragma once

#if ENABLE(VIDEO)

#include "FloatPoint.h"
#include "RenderBlockFlow.h"

namespace WebCore {

class RenderBox;
class VTTCue;
class VTTCueBox;

class RenderVTTCue final : public RenderBlockFlow {
    WTF_MAKE_ISO_ALLOCATED(RenderVTTCue);
public:
    RenderVTTCue(VTTCueBox&, RenderStyle&&);

private:
    bool isRenderVTTCue() const final { return true; }

    void layout() override;

    bool isOutside() const;
    bool rectIsWithinContainer(const IntRect&) const;
    bool isOverlapping() const;
    RenderVTTCue* overlappingObject() const;
    RenderVTTCue* overlappingObjectForRect(const IntRect&) const;
    bool shouldSwitchDirection(LegacyInlineFlowBox*, LayoutUnit) const;

    void moveBoxesByStep(LayoutUnit);
    bool switchDirection(bool&, LayoutUnit&);
    void moveIfNecessaryToKeepWithinContainer();
    bool findNonOverlappingPosition(int& x, int& y) const;

    bool initializeLayoutParameters(LegacyInlineFlowBox*&, LayoutUnit&, LayoutUnit&);
    void placeBoxInDefaultPosition(LayoutUnit, bool&);
    void repositionCueSnapToLinesSet();
    void repositionCueSnapToLinesNotSet();
    void repositionGenericCue();

    RenderBlockFlow& backdropBox() const;
    RenderInline& cueBox() const;

    VTTCue* m_cue;
    FloatPoint m_fallbackPosition;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderVTTCue, isRenderVTTCue())

#endif // ENABLE(VIDEO)