Source/WebCore/mathml/MathMLUnderOverElement.cpp

/*
 * Copyright (C) 2025 Apple Inc. All rights reserved.
 * Copyright (C) 2016 Igalia S.L. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#include "config.h"
#include "MathMLUnderOverElement.h"

#if ENABLE(MATHML)

#include "RenderMathMLUnderOver.h"
#include "RenderObjectInlines.h"
#include <wtf/TZoneMallocInlines.h>

namespace WebCore {

WTF_MAKE_TZONE_ALLOCATED_IMPL(MathMLUnderOverElement);

using namespace MathMLNames;

inline MathMLUnderOverElement::MathMLUnderOverElement(const QualifiedName& tagName, Document& document)
    : MathMLScriptsElement(tagName, document)
{
}

Ref<MathMLUnderOverElement> MathMLUnderOverElement::create(const QualifiedName& tagName, Document& document)
{
    return adoptRef(*new MathMLUnderOverElement(tagName, document));
}

const MathMLElement::BooleanValue& MathMLUnderOverElement::accent()
{
    return cachedBooleanAttribute(accentAttr, m_accent);
}

const MathMLElement::BooleanValue& MathMLUnderOverElement::accentUnder()
{
    return cachedBooleanAttribute(accentunderAttr, m_accentUnder);
}

void MathMLUnderOverElement::attributeChanged(const QualifiedName& name, const AtomString& oldValue, const AtomString& newValue, AttributeModificationReason attributeModificationReason)
{
    bool affectsLayout = false;
    switch (name.nodeName()) {
    case AttributeNames::accentAttr:
        m_accent = std::nullopt;
        affectsLayout = true;
        break;
    case AttributeNames::accentunderAttr:
        m_accentUnder = std::nullopt;
        affectsLayout = true;
        break;
    default:
        break;
    }

    if (affectsLayout) {
        if (CheckedPtr renderer = this->renderer())
            renderer->setNeedsLayoutAndPreferredWidthsUpdate();
    }

    MathMLElement::attributeChanged(name, oldValue, newValue, attributeModificationReason);
}

RenderPtr<RenderElement> MathMLUnderOverElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
    ASSERT(hasTagName(munderTag) || hasTagName(moverTag) || hasTagName(munderoverTag));
    return createRenderer<RenderMathMLUnderOver>(*this, WTF::move(style));
}

}

#endif // ENABLE(MATHML)