chromium/third_party/blink/renderer/core/css/css_grid_auto_repeat_value.h

// Copyright 2016 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_CSS_CSS_GRID_AUTO_REPEAT_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_GRID_AUTO_REPEAT_VALUE_H_

#include "third_party/blink/renderer/core/css/css_value_list.h"
#include "third_party/blink/renderer/core/css_value_keywords.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"

namespace WTF {
class String;
}  // namespace WTF

namespace blink {
namespace cssvalue {

// CSSGridAutoRepeatValue stores the track sizes and line numbers when the
// auto-repeat syntax is used
//
// Right now the auto-repeat syntax is as follows:
// <auto-repeat>  = repeat( [ auto-fill | auto-fit ], <line-names>? <fixed-size>
// <line-names>? )
//
// meaning that only one fixed size track is allowed. It could be argued that a
// different class storing two CSSBracketedValueList and one CSSValue (for the
// track size) fits better but the CSSWG has left the door open to allow more
// than one track in the future. That's why we're using a list, it's prepared
// for future changes and it also allows us to keep the parsing algorithm almost
// intact.
class CSSGridAutoRepeatValue : public CSSValueList { … };

}  // namespace cssvalue

template <>
struct DowncastTraits<cssvalue::CSSGridAutoRepeatValue> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_GRID_AUTO_REPEAT_VALUE_H_