blob: 255833f92844facfb66e30cf073e8177f33b58c3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
// 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_CSS_PARSER_FONT_VARIANT_LIGATURES_PARSER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_PARSER_FONT_VARIANT_LIGATURES_PARSER_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_parser_token_range.h"
#include "third_party/blink/renderer/core/css/properties/css_parsing_utils.h"
namespace blink {
class FontVariantLigaturesParser {
STACK_ALLOCATED();
public:
FontVariantLigaturesParser()
: saw_common_ligatures_value_(false),
saw_discretionary_ligatures_value_(false),
saw_historical_ligatures_value_(false),
saw_contextual_ligatures_value_(false),
result_(CSSValueList::CreateSpaceSeparated()) {}
enum class ParseResult { kConsumedValue, kDisallowedValue, kUnknownValue };
ParseResult ConsumeLigature(CSSParserTokenRange& range) {
CSSValueID value_id = range.Peek().Id();
switch (value_id) {
case CSSValueID::kNoCommonLigatures:
case CSSValueID::kCommonLigatures:
if (saw_common_ligatures_value_)
return ParseResult::kDisallowedValue;
saw_common_ligatures_value_ = true;
break;
case CSSValueID::kNoDiscretionaryLigatures:
case CSSValueID::kDiscretionaryLigatures:
if (saw_discretionary_ligatures_value_)
return ParseResult::kDisallowedValue;
saw_discretionary_ligatures_value_ = true;
break;
case CSSValueID::kNoHistoricalLigatures:
case CSSValueID::kHistoricalLigatures:
if (saw_historical_ligatures_value_)
return ParseResult::kDisallowedValue;
saw_historical_ligatures_value_ = true;
break;
case CSSValueID::kNoContextual:
case CSSValueID::kContextual:
if (saw_contextual_ligatures_value_)
return ParseResult::kDisallowedValue;
saw_contextual_ligatures_value_ = true;
break;
default:
return ParseResult::kUnknownValue;
}
result_->Append(*css_parsing_utils::ConsumeIdent(range));
return ParseResult::kConsumedValue;
}
CSSValue* FinalizeValue() {
if (!result_->length())
return CSSIdentifierValue::Create(CSSValueID::kNormal);
CSSValue* result = result_;
result_ = nullptr;
return result;
}
private:
bool saw_common_ligatures_value_;
bool saw_discretionary_ligatures_value_;
bool saw_historical_ligatures_value_;
bool saw_contextual_ligatures_value_;
CSSValueList* result_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_PARSER_FONT_VARIANT_LIGATURES_PARSER_H_
|
