Source/WebCore/css/CSSLightDarkImageValue.cpp

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#include "config.h"
#include "CSSLightDarkImageValue.h"

#include "CSSKeywordValue.h"
#include "Document.h"
#include "StyleBuilderState.h"
#include "StyleColorImage.h"

namespace WebCore {

Ref<CSSLightDarkImageValue> CSSLightDarkImageValue::create(Ref<CSSValue>&& lightValue, Ref<CSSValue>&& darkValue)
{
    return adoptRef(*new CSSLightDarkImageValue(WTF::move(lightValue), WTF::move(darkValue)));
}

CSSLightDarkImageValue::CSSLightDarkImageValue(Ref<CSSValue>&& lightValue, Ref<CSSValue>&& darkValue)
    : CSSValue { ClassType::LightDarkImage }
    , m_lightValue { WTF::move(lightValue) }
    , m_darkValue { WTF::move(darkValue) }
{
}

CSSLightDarkImageValue::~CSSLightDarkImageValue() = default;

String CSSLightDarkImageValue::customCSSText(const CSS::SerializationContext& context) const
{
    return makeString("light-dark("_s, m_lightValue->cssText(context), ", "_s, m_darkValue->cssText(context), ')');
}

bool CSSLightDarkImageValue::equals(const CSSLightDarkImageValue& other) const
{
    return compareCSSValue(m_lightValue, other.m_lightValue)
        && compareCSSValue(m_darkValue, other.m_darkValue);
}

static RefPtr<Style::Image> resolveImageOrNone(const CSSValue& value, const Style::BuilderState& state)
{
    if (auto* keyword = dynamicDowncast<CSSKeywordValue>(value); keyword && keyword->valueID() == CSSValueNone)
        return Style::ColorImage::create(Style::Color { WebCore::Color::transparentBlack });
    return state.createStyleImage(value);
}

RefPtr<Style::Image> CSSLightDarkImageValue::createStyleImage(const Style::BuilderState& state) const
{
    CheckedRef style = state.style();
    bool isDark = state.document().useDarkAppearance(style.ptr());
    Ref activeValue = isDark ? m_darkValue.get() : m_lightValue.get();
    return resolveImageOrNone(activeValue, state);
}

IterationStatus CSSLightDarkImageValue::customVisitChildren(NOESCAPE const Function<IterationStatus(CSSValue&)>& func) const
{
    if (func(m_lightValue) == IterationStatus::Done)
        return IterationStatus::Done;
    return func(m_darkValue);
}

} // namespace WebCore