Source/core/rendering/shapes/ShapeOutsideInfo.h

/*
 * Copyright (C) 2012 Adobe Systems Incorporated. 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 THE COPYRIGHT HOLDER “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 HOLDER 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
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 */

#ifndef ShapeOutsideInfo_h
#define ShapeOutsideInfo_h

#include "core/platform/graphics/LayoutSize.h"
#include "core/rendering/shapes/ShapeInfo.h"

namespace WebCore {

class RenderBlock;
class RenderBox;
class FloatingObject;

class ShapeOutsideInfo FINAL : public ShapeInfo<RenderBox>, public MappedInfo<RenderBox, ShapeOutsideInfo> {
public:
    LayoutUnit leftSegmentMarginBoxDelta() const { return m_leftSegmentMarginBoxDelta; }
    LayoutUnit rightSegmentMarginBoxDelta() const { return m_rightSegmentMarginBoxDelta; }

    bool computeSegmentsForContainingBlockLine(const RenderBlock*, const FloatingObject*, LayoutUnit lineTop, LayoutUnit lineHeight);
    virtual bool computeSegmentsForLine(LayoutUnit lineTop, LayoutUnit lineHeight) OVERRIDE;

    static PassOwnPtr<ShapeOutsideInfo> createInfo(const RenderBox* renderer) { return adoptPtr(new ShapeOutsideInfo(renderer)); }
    static bool isEnabledFor(const RenderBox*);

    virtual bool lineOverlapsShapeBounds() const OVERRIDE
    {
        return (logicalLineTop() < shapeLogicalBottom() && shapeLogicalTop() < logicalLineBottom())
            || logicalLineTop() == shapeLogicalTop(); // case of zero height line or zero height shape
    }

protected:
    virtual LayoutRect computedShapeLogicalBoundingBox() const OVERRIDE { return computedShape()->shapeMarginLogicalBoundingBox(); }
    virtual ShapeValue* shapeValue() const OVERRIDE;
    virtual void getIntervals(LayoutUnit lineTop, LayoutUnit lineHeight, SegmentList& segments) const OVERRIDE
    {
        return computedShape()->getExcludedIntervals(lineTop, lineHeight, segments);
    }

private:
    ShapeOutsideInfo(const RenderBox* renderer) : ShapeInfo<RenderBox>(renderer) { }

    LayoutUnit m_leftSegmentMarginBoxDelta;
    LayoutUnit m_rightSegmentMarginBoxDelta;
    LayoutUnit m_lineTop;
};

}
#endif