chromium/third_party/blink/renderer/core/layout/physical_fragment_rare_data.h

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_PHYSICAL_FRAGMENT_RARE_DATA_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_PHYSICAL_FRAGMENT_RARE_DATA_H_

#include <climits>

#include "third_party/blink/renderer/core/layout/geometry/logical_rect.h"
#include "third_party/blink/renderer/core/layout/table/table_fragment_data.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"

namespace blink {

class BoxFragmentBuilder;
class TableBorders;
struct FrameSetLayoutData;
struct MathMLPaintInfo;

// This class manages rare data of PhysicalBoxFragment.
// Only PhysicalBoxFragment should use this class.
//
// How to add a new field:
//  * Add a new enum member to FieldId.
//    If the new one has the maximum value, update kMaxValue too.
//  * Add a new union member of RareField.
//    The size of a member should be smaller than or same as LayoutUnit[4].
//    If it's larger, it should be pointed by a pointer such as
//    std::unique_ptr<>.
//
//  * Add field initialization code to two PhysicalFragmentRareData constructors
//  * Update DISPATCH_BY_MEMBER_TYPE macro.
class PhysicalFragmentRareData
    : public GarbageCollected<PhysicalFragmentRareData> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_PHYSICAL_FRAGMENT_RARE_DATA_H_