/*
 * 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 "BoxExtents.h"
#include "StyleLengthWrapper.h"

namespace WebCore {

class LayoutRect;

namespace Style {

// <'scroll-padding-*'> = auto | <length-percentage [0,∞]>
// https://drafts.csswg.org/css-scroll-snap-1/#padding-longhands-physical
struct ScrollPaddingEdge : LengthWrapperBase<LengthPercentage<CSS::Nonnegative>, CSS::Keyword::Auto> {
    using Base::Base;

private:
    friend struct Evaluation<ScrollPaddingEdge>;
};

// <'scroll-padding'> = [ auto | <length-percentage [0,∞]> ]{1,4}
// https://drafts.csswg.org/css-scroll-snap-1/#propdef-scroll-padding
using ScrollPaddingBox = MinimallySerializingSpaceSeparatedRectEdges<ScrollPaddingEdge>;

// MARK: - Evaluation

template<> struct Evaluation<ScrollPaddingEdge> {
    auto operator()(const ScrollPaddingEdge&, LayoutUnit referenceLength) -> LayoutUnit;
    auto operator()(const ScrollPaddingEdge&, float referenceLength) -> float;
};

// MARK: - Extent

LayoutBoxExtent extentForRect(const ScrollPaddingBox&, const LayoutRect&);

} // namespace Style
} // namespace WebCore

template<> inline constexpr auto WebCore::TreatAsVariantLike<WebCore::Style::ScrollPaddingEdge> = true;
