Source/WebCore/css/parser/CSSParserFastPaths.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Copyright (C) 2016-2020 Apple Inc. All rights reserved.
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#pragma once

#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "ColorTypes.h"
#include <optional>
#include <wtf/Forward.h>

namespace WebCore {

class CSSValue;

struct CSSParserContext;

class CSSParserFastPaths {
public:
    // Parses simple values like '10px' or 'green', but makes no guarantees about handling any property completely.
    static RefPtr<CSSValue> maybeParseValue(CSSPropertyID, StringView, const CSSParserContext&);

    // Properties handled here shouldn't be explicitly handled in CSSPropertyParser.
    static bool isKeywordPropertyID(CSSPropertyID);

    // Returns whether a property may be handled by the fast path but has other
    // non-keyword values which should be handled by the CSSPropertyParser.
    static bool isPartialKeywordPropertyID(CSSPropertyID);

    static bool isValidKeywordPropertyAndValue(CSSPropertyID, CSSValueID, const CSSParserContext&);

    // Parses numeric and named colors.
    static std::optional<SRGBA<uint8_t>> parseSimpleColor(StringView, bool strict = false);
    static std::optional<SRGBA<uint8_t>> parseHexColor(StringView); // Hex colors of length 3, 4, 6, or 8, without leading "#".
    static std::optional<SRGBA<uint8_t>> parseNamedColor(StringView);
};

} // namespace WebCore