Source/WebCore/css/parser/CSSParserMode.h

/*
 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
 * Copyright (C) 2012-2020 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
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 *    copyright notice, this list of conditions and the following
 *    disclaimer.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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 */

#pragma once

namespace WebCore {

// Must not grow beyond 3 bits, due to packing in StyleProperties.
enum CSSParserMode {
    HTMLStandardMode,
    HTMLQuirksMode,
    // SVG attributes are parsed in quirks mode but rules differ slightly.
    SVGAttributeMode,
    // @viewport rules are parsed in standards mode but CSSOM modifications (via StylePropertySet)
    // must call parseViewportProperties so needs a special mode.
    CSSViewportRuleMode,
    // User agent stylesheets are parsed in standards mode but also allows internal properties and values.
    UASheetMode,
    // WebVTT places limitations on external resources.
    WebVTTMode
};

inline bool isQuirksModeBehavior(CSSParserMode mode)
{
    return mode == HTMLQuirksMode;
}

inline bool isUASheetBehavior(CSSParserMode mode)
{
    return mode == UASheetMode;
}

inline bool isUnitLessValueParsingEnabledForMode(CSSParserMode mode)
{
    return mode == SVGAttributeMode;
}

inline bool isCSSViewportParsingEnabledForMode(CSSParserMode mode)
{
    return mode == CSSViewportRuleMode;
}

// FIXME-NEWPARSER: Next two functions should be removed eventually.
inline CSSParserMode strictToCSSParserMode(bool inStrictMode)
{
    return inStrictMode ? HTMLStandardMode : HTMLQuirksMode;
}

inline bool isStrictParserMode(CSSParserMode cssParserMode)
{
    switch (cssParserMode) {
    case UASheetMode:
    case HTMLStandardMode:
    case SVGAttributeMode:
    case WebVTTMode:
        return true;
    case HTMLQuirksMode:
    case CSSViewportRuleMode:
        return false;
    }
    ASSERT_NOT_REACHED();
    return false;
}

} // namespace WebCore