// Copyright 2015 The Chromium Authors. All rights reserved.
// Copyright (C) 2016 Apple Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above
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// in the documentation and/or other materials provided with the
// distribution.
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
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#pragma once

#include "CSSValue.h"
#include "CSSVariableData.h"
#include <wtf/RefPtr.h>

namespace WebCore {

class CSSVariableReferenceValue : public CSSValue {
public:
    static Ref<CSSVariableReferenceValue> create(Ref<CSSVariableData>&& data)
    {
        return adoptRef(*new CSSVariableReferenceValue(WTFMove(data)));
    }

    CSSVariableData* variableDataValue() const
    {
        return m_data.get();
    }

    bool equals(const CSSVariableReferenceValue& other) const { return m_data == other.m_data; }
    String customCSSText() const;

    bool checkVariablesForCycles(const AtomicString& name, CustomPropertyValueMap&, HashSet<AtomicString>& seenProperties, HashSet<AtomicString>& invalidProperties) const;

private:
    CSSVariableReferenceValue(Ref<CSSVariableData>&& data)
        : CSSValue(VariableReferenceClass)
        , m_data(WTFMove(data))
    {
    }

    RefPtr<CSSVariableData> m_data;
    mutable String m_stringValue;
    mutable bool m_serialized { false };
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSVariableReferenceValue, isVariableReferenceValue())
