RenderMathMLFraction.h [plain text]
#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;
};
}
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLFraction, isRenderMathMLFraction())
#endif // ENABLE(MATHML)