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// Copyright 2016 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_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 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 CSSGridLineNamesValue 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 {
public:
CSSGridAutoRepeatValue(CSSValueID id)
: CSSValueList(kGridAutoRepeatClass, kSpaceSeparator),
auto_repeat_id_(id) {
DCHECK(id == CSSValueID::kAutoFill || id == CSSValueID::kAutoFit);
}
String CustomCSSText() const;
bool Equals(const CSSGridAutoRepeatValue&) const;
CSSValueID AutoRepeatID() const { return auto_repeat_id_; }
void TraceAfterDispatch(blink::Visitor* visitor) const {
CSSValueList::TraceAfterDispatch(visitor);
}
private:
const CSSValueID auto_repeat_id_;
};
} // namespace cssvalue
template <>
struct DowncastTraits<cssvalue::CSSGridAutoRepeatValue> {
static bool AllowFrom(const CSSValue& value) {
return value.IsGridAutoRepeatValue();
}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_GRID_AUTO_REPEAT_VALUE_H_
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