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/*
* Copyright (C) 2010 Alex Milowski (alex@milowski.com). All rights reserved.
* Copyright (C) 2013 The MathJax Consortium.
* 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 "RenderMathMLBlock.h"
namespace WebCore {
class MathMLScriptsElement;
// Render a base with scripts.
class RenderMathMLScripts : public RenderMathMLBlock {
public:
RenderMathMLScripts(MathMLScriptsElement&, RenderStyle&&);
RenderMathMLOperator* unembellishedOperator() final;
protected:
bool isRenderMathMLScripts() const override { return true; }
const char* renderName() const override { return "RenderMathMLScripts"; }
void computePreferredLogicalWidths() override;
void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0) override;
enum ScriptsType { Sub, Super, SubSup, Multiscripts, Under, Over, UnderOver };
ScriptsType m_scriptType;
private:
MathMLScriptsElement& element() const;
std::optional<int> firstLineBaseline() const final;
struct ReferenceChildren {
RenderBox* base;
RenderBox* prescriptDelimiter;
RenderBox* firstPostScript;
RenderBox* firstPreScript;
};
std::optional<ReferenceChildren> validateAndGetReferenceChildren();
LayoutUnit spaceAfterScript();
LayoutUnit italicCorrection(const ReferenceChildren&);
struct VerticalParameters {
LayoutUnit subscriptShiftDown;
LayoutUnit superscriptShiftUp;
LayoutUnit subscriptBaselineDropMin;
LayoutUnit superScriptBaselineDropMax;
LayoutUnit subSuperscriptGapMin;
LayoutUnit superscriptBottomMin;
LayoutUnit subscriptTopMax;
LayoutUnit superscriptBottomMaxWithSubscript;
};
VerticalParameters verticalParameters() const;
struct VerticalMetrics {
LayoutUnit subShift;
LayoutUnit supShift;
LayoutUnit ascent;
LayoutUnit descent;
};
VerticalMetrics verticalMetrics(const ReferenceChildren&);
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLScripts, isRenderMathMLScripts())
#endif // ENABLE(MATHML)
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