Source/WebCore/css/DeprecatedCSSOMValue.cpp

/*
 * Copyright (C) 2016-2022 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#include "config.h"
#include "DeprecatedCSSOMValue.h"

#include "DeprecatedCSSOMPrimitiveValue.h"
#include "DeprecatedCSSOMValueList.h"

namespace WebCore {

void DeprecatedCSSOMValue::operator delete(DeprecatedCSSOMValue* value, std::destroying_delete_t)
{
    switch (value->classType()) {
    case ClassType::Complex:
        std::destroy_at(downcast<DeprecatedCSSOMComplexValue>(value));
        break;
    case ClassType::Primitive:
        std::destroy_at(downcast<DeprecatedCSSOMPrimitiveValue>(value));
        break;
    case ClassType::List:
        std::destroy_at(downcast<DeprecatedCSSOMValueList>(value));
        break;
    }
    freeAfterDestruction(value);
}

unsigned short DeprecatedCSSOMValue::cssValueType() const
{
    switch (classType()) {
    case ClassType::Complex:
        return downcast<DeprecatedCSSOMComplexValue>(*this).cssValueType();
    case ClassType::Primitive:
        return downcast<DeprecatedCSSOMPrimitiveValue>(*this).cssValueType();
    case ClassType::List:
        return CSS_VALUE_LIST;
    }
    ASSERT_NOT_REACHED();
    return CSS_CUSTOM;
}

String DeprecatedCSSOMValue::cssText() const
{
    switch (classType()) {
    case ClassType::Complex:
        return downcast<DeprecatedCSSOMComplexValue>(*this).cssText();
    case ClassType::Primitive:
        return downcast<DeprecatedCSSOMPrimitiveValue>(*this).cssText();
    case ClassType::List:
        return downcast<DeprecatedCSSOMValueList>(*this).cssText();
    }
    ASSERT_NOT_REACHED();
    return emptyString();
}

unsigned short DeprecatedCSSOMComplexValue::cssValueType() const
{
    // These values are exposed in the DOM, but constants for them are not.
    constexpr unsigned short CSS_INITIAL = 4;
    constexpr unsigned short CSS_UNSET = 5;
    constexpr unsigned short CSS_REVERT = 6;

    if (m_value->isInheritValue())
        return CSS_INHERIT;
    if (m_value->isInitialValue())
        return CSS_INITIAL;
    if (m_value->isUnsetValue())
        return CSS_UNSET;
    if (m_value->isRevertValue())
        return CSS_REVERT;
    return CSS_CUSTOM;
}

}