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/*
* Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved.
* Copyright (C) 2010 François Sausset (sausset@gmail.com). All rights reserved.
* Copyright (C) 2016 Igalia S.L.
*
* 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 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,
* 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(MATHML)
#include "MathMLFractionElement.h"
#include "RenderMathMLBlock.h"
namespace WebCore {
class MathMLFractionElement;
class RenderMathMLFraction final : public RenderMathMLBlock {
public:
RenderMathMLFraction(MathMLFractionElement&, RenderStyle&&);
float relativeLineThickness() const { return m_defaultLineThickness ? m_lineThickness / m_defaultLineThickness : LayoutUnit(0); }
private:
bool isRenderMathMLFraction() const final { return true; }
const char* renderName() const final { return "RenderMathMLFraction"; }
void computePreferredLogicalWidths() final;
void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) final;
std::optional<int> firstLineBaseline() const final;
void paint(PaintInfo&, const LayoutPoint&) final;
RenderMathMLOperator* unembellishedOperator() final;
MathMLFractionElement& element() const { return static_cast<MathMLFractionElement&>(nodeForNonAnonymous()); }
bool isStack() const { return !m_lineThickness; }
bool isValid() const;
RenderBox& numerator() const;
RenderBox& denominator() const;
LayoutUnit horizontalOffset(RenderBox&, MathMLFractionElement::FractionAlignment);
void updateLineThickness();
struct FractionParameters {
LayoutUnit numeratorGapMin;
LayoutUnit denominatorGapMin;
LayoutUnit numeratorMinShiftUp;
LayoutUnit denominatorMinShiftDown;
};
FractionParameters fractionParameters();
struct StackParameters {
LayoutUnit gapMin;
LayoutUnit topShiftUp;
LayoutUnit bottomShiftDown;
};
StackParameters stackParameters();
LayoutUnit m_ascent;
LayoutUnit m_defaultLineThickness { 1 };
LayoutUnit m_lineThickness;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLFraction, isRenderMathMLFraction())
#endif // ENABLE(MATHML)
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