/*
 * Copyright (C) 2011 Google 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
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 */

#pragma once

#include "Length.h"
#include <wtf/Forward.h>
#include <wtf/Ref.h>
#include <wtf/RefCounted.h>

namespace WebCore {

class CalcExpressionNode;

class CalculationValue : public RefCounted<CalculationValue> {
public:
    WEBCORE_EXPORT static Ref<CalculationValue> create(std::unique_ptr<CalcExpressionNode>, ValueRange);
    WEBCORE_EXPORT ~CalculationValue();

    float evaluate(float maxValue) const;

    bool shouldClampToNonNegative() const { return m_shouldClampToNonNegative; }
    const CalcExpressionNode& expression() const { return *m_expression; }

private:
    CalculationValue(std::unique_ptr<CalcExpressionNode>, ValueRange);

    std::unique_ptr<CalcExpressionNode> m_expression;
    bool m_shouldClampToNonNegative;
};

bool operator==(const CalculationValue&, const CalculationValue&);

TextStream& operator<<(TextStream&, const CalculationValue&);

} // namespace WebCore