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// Copyright 2017 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.
#include "core/css/properties/CSSPropertyAlignmentUtils.h"
#include "core/css/CSSValuePair.h"
#include "core/css/parser/CSSPropertyParserHelpers.h"
namespace blink {
namespace {
CSSIdentifierValue* consumeSelfPositionKeyword(
CSSParserTokenRange& range) {
CSSValueID id = range.peek().id();
if (id == CSSValueStart || id == CSSValueEnd || id == CSSValueCenter ||
id == CSSValueSelfStart || id == CSSValueSelfEnd ||
id == CSSValueFlexStart || id == CSSValueFlexEnd || id == CSSValueLeft ||
id == CSSValueRight)
return CSSPropertyParserHelpers::consumeIdent(range);
return nullptr;
}
} // namespace
CSSValue* CSSPropertyAlignmentUtils::consumeSelfPositionOverflowPosition(
CSSParserTokenRange& range) {
if (CSSPropertyParserHelpers::identMatches<CSSValueAuto, CSSValueNormal,
CSSValueStretch, CSSValueBaseline,
CSSValueLastBaseline>(
range.peek().id()))
return CSSPropertyParserHelpers::consumeIdent(range);
CSSIdentifierValue* overflowPosition =
CSSPropertyParserHelpers::consumeIdent<CSSValueUnsafe, CSSValueSafe>(
range);
CSSIdentifierValue* selfPosition = consumeSelfPositionKeyword(range);
if (!selfPosition)
return nullptr;
if (!overflowPosition) {
overflowPosition =
CSSPropertyParserHelpers::consumeIdent<CSSValueUnsafe, CSSValueSafe>(
range);
}
if (overflowPosition) {
return CSSValuePair::create(selfPosition, overflowPosition,
CSSValuePair::DropIdenticalValues);
}
return selfPosition;
}
} // namespace blink
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