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/*
* Copyright (C) 2010 Alex Milowski (alex@milowski.com). All rights reserved.
* Copyright (C) 2012 David Barton (dbarton@mathscribe.com). 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 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 "MathMLElement.h"
#include "MathMLStyle.h"
#include "RenderBlock.h"
#include "RenderTable.h"
namespace WebCore {
class RenderMathMLOperator;
class MathMLPresentationElement;
class RenderMathMLBlock : public RenderBlock {
WTF_MAKE_ISO_ALLOCATED(RenderMathMLBlock);
public:
RenderMathMLBlock(MathMLPresentationElement&, RenderStyle&&);
RenderMathMLBlock(Document&, RenderStyle&&);
virtual ~RenderMathMLBlock();
MathMLStyle& mathMLStyle() const { return m_mathMLStyle; }
bool isChildAllowed(const RenderObject&, const RenderStyle&) const override;
// MathML defines an "embellished operator" as roughly an <mo> that may have subscripts,
// superscripts, underscripts, overscripts, or a denominator (as in d/dx, where "d" is some
// differential operator). The padding, precedence, and stretchiness of the base <mo> should
// apply to the embellished operator as a whole. unembellishedOperator() checks for being an
// embellished operator, and omits any embellishments.
// FIXME: We don't yet handle all the cases in the MathML spec. See
// https://bugs.webkit.org/show_bug.cgi?id=78617.
virtual RenderMathMLOperator* unembellishedOperator() const { return 0; }
LayoutUnit baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const override;
#if ENABLE(DEBUG_MATH_LAYOUT)
virtual void paint(PaintInfo&, const LayoutPoint&);
#endif
protected:
void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
inline LayoutUnit ruleThicknessFallback() const;
LayoutUnit mathAxisHeight() const;
LayoutUnit mirrorIfNeeded(LayoutUnit horizontalOffset, LayoutUnit boxWidth = 0_lu) const;
inline LayoutUnit mirrorIfNeeded(LayoutUnit horizontalOffset, const RenderBox& child) const;
static inline LayoutUnit ascentForChild(const RenderBox& child);
void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0_lu) override;
void layoutInvalidMarkup(bool relayoutChildren);
private:
bool isRenderMathMLBlock() const final { return true; }
ASCIILiteral renderName() const override { return "RenderMathMLBlock"_s; }
bool avoidsFloats() const final { return true; }
bool canDropAnonymousBlockChild() const final { return false; }
void layoutItems(bool relayoutChildren);
Ref<MathMLStyle> m_mathMLStyle;
};
class RenderMathMLTable final : public RenderTable {
WTF_MAKE_ISO_ALLOCATED(RenderMathMLTable);
public:
inline RenderMathMLTable(MathMLElement&, RenderStyle&&);
MathMLStyle& mathMLStyle() const { return m_mathMLStyle; }
private:
bool isRenderMathMLTable() const final { return true; }
ASCIILiteral renderName() const final { return "RenderMathMLTable"_s; }
std::optional<LayoutUnit> firstLineBaseline() const final;
Ref<MathMLStyle> m_mathMLStyle;
};
LayoutUnit toUserUnits(const MathMLElement::Length&, const RenderStyle&, const LayoutUnit& referenceValue);
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLBlock, isRenderMathMLBlock())
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLTable, isRenderMathMLTable())
#endif // ENABLE(MATHML)
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