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/*
* 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,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#pragma once
#include "TextEncoding.h"
#include "URL.h"
#include "URLHash.h"
#include <wtf/HashFunctions.h>
#include <wtf/text/StringHash.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 };
bool cssGridLayoutEnabled { false };
#if ENABLE(TEXT_AUTOSIZING)
bool textAutosizingEnabled { false };
#endif
bool needsSiteSpecificQuirks { false };
bool enforcesCSSMIMETypeInNoQuirksMode { true };
bool useLegacyBackgroundSizeShorthandBehavior { false };
bool springTimingFunctionEnabled { false };
bool deferredCSSParserEnabled { false };
URL completeURL(const String& url) const
{
if (url.isNull())
return URL();
if (charset.isEmpty())
return URL(baseURL, url);
return URL(baseURL, url, TextEncoding(charset));
}
};
bool operator==(const CSSParserContext&, const CSSParserContext&);
inline bool operator!=(const CSSParserContext& a, const CSSParserContext& b) { return !(a == b); }
WEBCORE_EXPORT const CSSParserContext& strictCSSParserContext();
struct CSSParserContextHash {
static unsigned hash(const CSSParserContext& key)
{
auto hash = URLHash::hash(key.baseURL);
if (!key.charset.isEmpty())
hash ^= StringHash::hash(key.charset);
unsigned bits = key.isHTMLDocument << 0
& key.isHTMLDocument << 1
& key.cssGridLayoutEnabled << 2
#if ENABLE(TEXT_AUTOSIZING)
& key.textAutosizingEnabled << 3
#endif
& key.needsSiteSpecificQuirks << 4
& key.enforcesCSSMIMETypeInNoQuirksMode << 5
& key.useLegacyBackgroundSizeShorthandBehavior << 6
& key.springTimingFunctionEnabled << 7
& key.deferredCSSParserEnabled << 8
& key.mode << 9;
hash ^= WTF::intHash(bits);
return hash;
}
static bool equal(const CSSParserContext& a, const CSSParserContext& b)
{
return a == b;
}
static const bool safeToCompareToEmptyOrDeleted = false;
};
} // namespace WebCore
namespace WTF {
template<> struct HashTraits<WebCore::CSSParserContext> : GenericHashTraits<WebCore::CSSParserContext> {
static void constructDeletedValue(WebCore::CSSParserContext& slot) { new (NotNull, &slot.baseURL) WebCore::URL(WTF::HashTableDeletedValue); }
static bool isDeletedValue(const WebCore::CSSParserContext& value) { return value.baseURL.isHashTableDeletedValue(); }
static WebCore::CSSParserContext emptyValue() { return WebCore::CSSParserContext(WebCore::HTMLStandardMode); }
};
template<> struct DefaultHash<WebCore::CSSParserContext> {
typedef WebCore::CSSParserContextHash Hash;
};
} // namespace WTF
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