chromium/third_party/blink/renderer/core/style/grid_track_size.h

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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_GRID_TRACK_SIZE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_GRID_TRACK_SIZE_H_

#include "third_party/blink/renderer/platform/geometry/length.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"

namespace blink {

enum GridTrackSizeType { … };

// This class represents a <track-size> from the spec. Althought there are 3
// different types of <track-size> there is always an equivalent minmax()
// representation that could represent any of them. The only special case is
// fit-content(argument) which is similar to minmax(auto, max-content) except
// that the track size is clamped at argument if it is greater than the auto
// minimum. At the GridTrackSize level we don't need to worry about clamping so
// we treat that case exactly as auto.
//
// We're using a separate attribute to store fit-content argument even though we
// could directly use m_maxTrackBreadth. The reason why we don't do it is
// because the maxTrackBreadh() call is a hot spot, so adding a conditional
// statement there (to distinguish between fit-content and any other case) was
// causing a severe performance drop.
class GridTrackSize { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_GRID_TRACK_SIZE_H_