/*
 * Copyright (C) 2025 Samuel Weinig <sam@webkit.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <WebCore/StylePrimitiveNumericTypes.h>

namespace WebCore {
namespace Style {

// <'zoom'> = <number [0,∞]> | <percentage [0,∞]> | normal
// NOTE: `normal` is non-standard and gets resolved to `1` at style building time.
// https://drafts.csswg.org/css-viewport/#propdef-zoom
struct Zoom {
    using Value = NumberOrPercentageResolvedToNumber<CSS::Nonnegative, CSS::Nonnegative, float>;
    using Number = Value::Number;
    using Percentage = Value::Percentage;

    // Clamp range for the effective zoom value, used to avoid overflow in
    // derived computations. Matches the values used by other engines.
    static constexpr float minEffective = 1e-6f;
    static constexpr float maxEffective = 1e6f;

    Value value;

    constexpr Zoom(Value value) : value { value } { }
    constexpr Zoom(Number number) : value { number } { }
    constexpr Zoom(Percentage percentage) : value { percentage } { }
    constexpr Zoom(typename Number::ResolvedValueType value) : value { value } { }
    constexpr Zoom(CSS::ValueLiteral<CSS::NumberUnit::Number> literal) : value { literal } { }
    constexpr Zoom(CSS::ValueLiteral<CSS::PercentageUnit::Percentage> literal) : value { literal } { }

    constexpr bool isZero() const { return value.isZero(); }

    constexpr bool operator==(const Zoom&) const = default;
    constexpr bool operator==(typename Number::ResolvedValueType other) const { return value == other; };
};
DEFINE_TYPE_WRAPPER_GET(Zoom, value)

} // namespace Style
} // namespace WebCore

DEFINE_TUPLE_LIKE_CONFORMANCE_FOR_TYPE_WRAPPER(WebCore::Style::Zoom)
