Source/WebCore/style/CustomFunctionRegistry.cpp

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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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#include "config.h"
#include "CustomFunctionRegistry.h"

namespace WebCore {
namespace Style {

WTF_MAKE_TZONE_ALLOCATED_IMPL(CustomFunction);
WTF_MAKE_TZONE_ALLOCATED_IMPL(CustomFunctionRegistry);

CustomFunction::CustomFunction(const AtomString& name, const Vector<StyleRuleFunction::Parameter>& parameters, const StyleProperties& properties)
    : name(name)
    , parameters(parameters)
    , properties(properties)
{
}

void CustomFunctionRegistry::registerFunction(const StyleRuleFunction& function, const Vector<Ref<const StyleRuleFunctionDeclarations>>& declarationsList)
{
    if (declarationsList.isEmpty())
        return;

    auto mergedProperties = [&]() -> Ref<const StyleProperties> {
        if (declarationsList.size() == 1)
            return declarationsList.first()->properties();

        auto mutableProperties = MutableStyleProperties::create();
        for (auto& declarations : declarationsList) {
            Ref properties = declarations->properties();
            mutableProperties->mergeAndOverrideOnConflict(properties.get());
        }
        return mutableProperties->immutableCopy();
    };

    auto customFunction = makeUniqueRef<CustomFunction>(function.name(), function.parameters(), mergedProperties());

    // Last function with the same name wins.
    m_functions.set(function.name(), WTF::move(customFunction));
}

const CustomFunction* CustomFunctionRegistry::functionForName(const AtomString& name) const
{
    return m_functions.get(name);
}

}
}