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// Copyright 2025 The Chromium Authors. All rights reserved.
// 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_STYLE_ITEM_TOLERANCE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_ITEM_TOLERANCE_H_
#include "third_party/blink/renderer/core/css_value_keywords.h"
#include "third_party/blink/renderer/platform/geometry/length.h"
namespace blink {
// This class is used to represent the possible values for the
// 'item-tolerance' property in the CSS Masonry Layout. More information can be
// found here: https://drafts.csswg.org/css-grid-3/#item-slack.
class ItemTolerance {
DISALLOW_NEW();
public:
explicit ItemTolerance() = default;
explicit ItemTolerance(const Length& length)
: item_tolerance_type_(ItemToleranceType::kLength), length_(length) {}
explicit ItemTolerance(CSSValueID keyword) {
if (keyword == CSSValueID::kNormal) {
item_tolerance_type_ = ItemToleranceType::kNormal;
} else if (keyword == CSSValueID::kInfinite) {
item_tolerance_type_ = ItemToleranceType::kInfinite;
} else {
NOTREACHED();
}
}
bool IsNormal() const {
return item_tolerance_type_ == ItemToleranceType::kNormal;
}
bool IsInfinite() const {
return item_tolerance_type_ == ItemToleranceType::kInfinite;
}
const Length& GetLength() const {
DCHECK(!IsNormal() && !IsInfinite());
return length_;
}
bool operator==(const ItemTolerance& o) const = default;
bool operator!=(const ItemTolerance& o) const = default;
private:
enum class ItemToleranceType { kNormal, kInfinite, kLength };
ItemToleranceType item_tolerance_type_{ItemToleranceType::kNormal};
Length length_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_ITEM_TOLERANCE_H_
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