Source/WebCore/rendering/VisibleRectContext.h

/*
 * 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/IntersectionObserverMarginBox.h>
#include <WebCore/RepaintRectCalculation.h>
#include <optional>
#include <wtf/OptionSet.h>

namespace WebCore {

struct VisibleRectContext {
    enum class Option : uint8_t {
        UseEdgeInclusiveIntersection        = 1 << 0,
        ApplyCompositedClips                = 1 << 1,
        ApplyCompositedContainerScrolls     = 1 << 2,
        ApplyContainerClip                  = 1 << 3,
        CalculateAccurateRepaintRect        = 1 << 4,
    };

    bool hasPositionFixedDescendant { false };
    bool dirtyRectIsFlipped { false };
    bool descendantNeedsEnclosingIntRect { false };
    OptionSet<Option> options { };
    std::optional<IntersectionObserverMarginBox> scrollMargin { };

    RepaintRectCalculation repaintRectCalculation() const
    {
        return options.contains(Option::CalculateAccurateRepaintRect) ? RepaintRectCalculation::Accurate : RepaintRectCalculation::Fast;
    }
};

} // namespace WebCore