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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 "third_party/blink/renderer/core/css/properties/longhands/text_underline_position.h"
#include "third_party/blink/renderer/core/css/css_identifier_value.h"
#include "third_party/blink/renderer/core/css/css_value_list.h"
#include "third_party/blink/renderer/core/css/parser/css_property_parser_helpers.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
namespace blink {
namespace CSSLonghand {
// auto | [ under || [ left | right ] ]
const CSSValue* TextUnderlinePosition::ParseSingleValue(
CSSParserTokenRange& range,
const CSSParserContext& context,
const CSSParserLocalContext&) const {
if (range.Peek().Id() == CSSValueAuto)
return CSSPropertyParserHelpers::ConsumeIdent(range);
CSSIdentifierValue* under_value =
CSSPropertyParserHelpers::ConsumeIdent<CSSValueUnder>(range);
CSSIdentifierValue* left_or_right_value = nullptr;
if (RuntimeEnabledFeatures::TextUnderlinePositionLeftRightEnabled()) {
left_or_right_value =
CSSPropertyParserHelpers::ConsumeIdent<CSSValueLeft, CSSValueRight>(
range);
if (left_or_right_value && !under_value) {
under_value =
CSSPropertyParserHelpers::ConsumeIdent<CSSValueUnder>(range);
}
}
if (!under_value && !left_or_right_value) {
return nullptr;
}
CSSValueList* list = CSSValueList::CreateSpaceSeparated();
if (under_value)
list->Append(*under_value);
if (left_or_right_value)
list->Append(*left_or_right_value);
return list;
}
const CSSValue* TextUnderlinePosition::CSSValueFromComputedStyleInternal(
const ComputedStyle& style,
const SVGComputedStyle&,
const LayoutObject*,
Node*,
bool allow_visited_style) const {
auto text_underline_position = style.TextUnderlinePosition();
if (text_underline_position == kTextUnderlinePositionAuto)
return CSSIdentifierValue::Create(CSSValueAuto);
if (text_underline_position == kTextUnderlinePositionUnder)
return CSSIdentifierValue::Create(CSSValueUnder);
if (text_underline_position == kTextUnderlinePositionLeft)
return CSSIdentifierValue::Create(CSSValueLeft);
if (text_underline_position == kTextUnderlinePositionRight)
return CSSIdentifierValue::Create(CSSValueRight);
CSSValueList* list = CSSValueList::CreateSpaceSeparated();
DCHECK(text_underline_position & kTextUnderlinePositionUnder);
list->Append(*CSSIdentifierValue::Create(CSSValueUnder));
if (text_underline_position & kTextUnderlinePositionLeft)
list->Append(*CSSIdentifierValue::Create(CSSValueLeft));
if (text_underline_position & kTextUnderlinePositionRight)
list->Append(*CSSIdentifierValue::Create(CSSValueRight));
DCHECK_EQ(list->length(), 2U);
return list;
}
} // namespace CSSLonghand
} // namespace blink
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