1// Copyright 2015 The Chromium Authors. All rights reserved.
2// Copyright (C) 2016 Apple Inc. All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
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7//
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9// notice, this list of conditions and the following disclaimer.
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12// in the documentation and/or other materials provided with the
13// distribution.
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17//
18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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29
30#pragma once
31
32#include "CSSParserToken.h"
33
34namespace WebCore {
35
36class CSSParserImpl;
37class CSSParserTokenRange;
38
39class CSSSupportsParser {
40public:
41 enum SupportsResult {
42 Unsupported = false,
43 Supported = true,
44 Invalid
45 };
46
47 enum SupportsParsingMode {
48 ForAtRule,
49 ForWindowCSS,
50 };
51
52 static SupportsResult supportsCondition(CSSParserTokenRange, CSSParserImpl&, SupportsParsingMode);
53
54private:
55 CSSSupportsParser(CSSParserImpl& parser)
56 : m_parser(parser) { }
57
58 SupportsResult consumeCondition(CSSParserTokenRange);
59 SupportsResult consumeNegation(CSSParserTokenRange);
60 SupportsResult consumeDeclarationConditionOrGeneralEnclosed(CSSParserTokenRange&);
61
62 SupportsResult consumeConditionInParenthesis(CSSParserTokenRange&, CSSParserTokenType);
63
64 CSSParserImpl& m_parser;
65};
66
67} // namespace WebCore
68