100 lines
4.4 KiB
C++
100 lines
4.4 KiB
C++
/*
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* Copyright (C) 2010 Alex Milowski (alex@milowski.com). All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(MATHML)
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#include "MathMLOperatorDictionary.h"
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#include "MathOperator.h"
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#include "RenderMathMLToken.h"
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namespace WebCore {
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class MathMLOperatorElement;
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class RenderMathMLOperator : public RenderMathMLToken {
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WTF_MAKE_ISO_ALLOCATED(RenderMathMLOperator);
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public:
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RenderMathMLOperator(MathMLOperatorElement&, RenderStyle&&);
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RenderMathMLOperator(Document&, RenderStyle&&);
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MathMLOperatorElement& element() const;
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void stretchTo(LayoutUnit heightAboveBaseline, LayoutUnit depthBelowBaseline);
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void stretchTo(LayoutUnit width);
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LayoutUnit stretchSize() const { return isVertical() ? m_stretchHeightAboveBaseline + m_stretchDepthBelowBaseline : m_stretchWidth; }
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void resetStretchSize();
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void setStretchWidthLocked(bool stretchWidthLocked) { m_isStretchWidthLocked = stretchWidthLocked; }
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bool isStretchWidthLocked() const { return m_isStretchWidthLocked; }
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virtual bool hasOperatorFlag(MathMLOperatorDictionary::Flag) const;
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bool isLargeOperatorInDisplayStyle() const { return !hasOperatorFlag(MathMLOperatorDictionary::Stretchy) && hasOperatorFlag(MathMLOperatorDictionary::LargeOp) && style().mathStyle() == MathStyle::Normal; }
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bool shouldMoveLimits() const { return hasOperatorFlag(MathMLOperatorDictionary::MovableLimits); }
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virtual bool isVertical() const;
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LayoutUnit italicCorrection() const { return m_mathOperator.italicCorrection(); }
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void updateTokenContent() final;
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void updateFromElement() final;
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virtual UChar32 textContent() const;
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bool isStretchy() const { return textContent() && hasOperatorFlag(MathMLOperatorDictionary::Stretchy); }
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protected:
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virtual void updateMathOperator();
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virtual LayoutUnit leadingSpace() const;
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virtual LayoutUnit trailingSpace() const;
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virtual LayoutUnit minSize() const;
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virtual LayoutUnit maxSize() const;
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virtual bool useMathOperator() const;
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private:
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void styleDidChange(StyleDifference, const RenderStyle* oldStyle) final;
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void computePreferredLogicalWidths() final;
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void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0_lu) final;
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void paint(PaintInfo&, const LayoutPoint&) final;
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const char* renderName() const final { return isAnonymous() ? "RenderMathMLOperator (anonymous)" : "RenderMathMLOperator"; }
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void paintChildren(PaintInfo& forSelf, const LayoutPoint&, PaintInfo& forChild, bool usePrintRect) final;
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bool isRenderMathMLOperator() const final { return true; }
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bool isInvisibleOperator() const;
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std::optional<LayoutUnit> firstLineBaseline() const final;
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RenderMathMLOperator* unembellishedOperator() const final { return const_cast<RenderMathMLOperator*>(this); }
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LayoutUnit verticalStretchedOperatorShift() const;
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LayoutUnit m_stretchHeightAboveBaseline { 0 };
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LayoutUnit m_stretchDepthBelowBaseline { 0 };
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LayoutUnit m_stretchWidth;
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bool m_isStretchWidthLocked { false };
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MathOperator m_mathOperator;
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};
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLOperator, isRenderMathMLOperator())
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#endif // ENABLE(MATHML)
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