Source/WebCore/css/parser/CSSParserMode.h

/*
 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
 * Copyright (C) 2012 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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 */

#ifndef CSSParserMode_h
#define CSSParserMode_h

#include "URL.h"

namespace WebCore {

class Document;

// Must not grow beyond 3 bits, due to packing in StyleProperties.
enum CSSParserMode {
    HTMLStandardMode,
    HTMLQuirksMode,
    // HTML attributes are parsed in quirks mode but also allows internal properties and values.
    HTMLAttributeMode,
    // 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
};

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

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

inline bool isUnitLessValueParsingEnabledForMode(CSSParserMode mode)
{
    return mode == HTMLAttributeMode || 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)
{
    return cssParserMode == UASheetMode || cssParserMode == HTMLStandardMode || cssParserMode == SVGAttributeMode;
}

struct CSSParserContext {
    WTF_MAKE_FAST_ALLOCATED;
public:
    CSSParserContext(CSSParserMode, const URL& baseURL = URL());
    WEBCORE_EXPORT CSSParserContext(Document&, const URL& baseURL = URL(), const String& charset = emptyString());

    URL baseURL;
    String charset;
    CSSParserMode mode { HTMLStandardMode };
    bool isHTMLDocument { false };
#if ENABLE(CSS_GRID_LAYOUT)
    bool cssGridLayoutEnabled { false };
#endif
#if ENABLE(TEXT_AUTOSIZING)
    bool textAutosizingEnabled { false };
#endif
    bool needsSiteSpecificQuirks { false };
    bool enforcesCSSMIMETypeInNoQuirksMode { true };
    bool useLegacyBackgroundSizeShorthandBehavior { false };
    bool springTimingFunctionEnabled { false };
    bool useNewParser { false };
};

bool operator==(const CSSParserContext&, const CSSParserContext&);
inline bool operator!=(const CSSParserContext& a, const CSSParserContext& b) { return !(a == b); }

WEBCORE_EXPORT const CSSParserContext& strictCSSParserContext();

};

#endif // CSSParserMode_h