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// Copyright 2014 The Chromium Authors. All rights reserved.
// Copyright (C) 2016-2021 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:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "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
// OWNER OR CONTRIBUTORS 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 "CSSPrimitiveValue.h"
#include <wtf/text/StringView.h>
namespace WebCore {
enum CSSParserTokenType {
IdentToken = 0,
FunctionToken,
AtKeywordToken,
HashToken,
UrlToken,
BadUrlToken,
DelimiterToken,
NumberToken,
PercentageToken,
DimensionToken,
IncludeMatchToken,
DashMatchToken,
PrefixMatchToken,
SuffixMatchToken,
SubstringMatchToken,
ColumnToken,
WhitespaceToken,
CDOToken,
CDCToken,
ColonToken,
SemicolonToken,
CommaToken,
LeftParenthesisToken,
RightParenthesisToken,
LeftBracketToken,
RightBracketToken,
LeftBraceToken,
RightBraceToken,
StringToken,
BadStringToken,
EOFToken,
CommentToken,
LastCSSParserTokenType = CommentToken,
};
constexpr std::underlying_type_t<CSSParserTokenType> numberOfCSSParserTokenTypes = LastCSSParserTokenType + 1;
enum NumericSign {
NoSign,
PlusSign,
MinusSign,
};
enum NumericValueType {
IntegerValueType,
NumberValueType,
};
enum HashTokenType {
HashTokenId,
HashTokenUnrestricted,
};
class CSSParserToken {
WTF_MAKE_FAST_ALLOCATED;
public:
enum BlockType {
NotBlock,
BlockStart,
BlockEnd,
};
CSSParserToken(CSSParserTokenType, BlockType = NotBlock);
CSSParserToken(CSSParserTokenType, StringView, BlockType = NotBlock);
CSSParserToken(CSSParserTokenType, UChar); // for DelimiterToken
CSSParserToken(double, NumericValueType, NumericSign, StringView originalText); // for NumberToken
CSSParserToken(HashTokenType, StringView);
static CSSUnitType stringToUnitType(StringView);
bool operator==(const CSSParserToken& other) const;
// Converts NumberToken to DimensionToken.
void convertToDimensionWithUnit(StringView);
// Converts NumberToken to PercentageToken.
void convertToPercentage();
CSSParserTokenType type() const { return static_cast<CSSParserTokenType>(m_type); }
StringView value() const
{
if (m_valueIs8Bit)
return StringView(static_cast<const LChar*>(m_valueDataCharRaw), m_valueLength);
return StringView(static_cast<const UChar*>(m_valueDataCharRaw), m_valueLength);
}
UChar delimiter() const;
NumericSign numericSign() const;
NumericValueType numericValueType() const;
double numericValue() const;
StringView originalText() const;
HashTokenType getHashTokenType() const { ASSERT(m_type == HashToken); return m_hashTokenType; }
BlockType getBlockType() const { return static_cast<BlockType>(m_blockType); }
CSSUnitType unitType() const { return static_cast<CSSUnitType>(m_unit); }
StringView unitString() const;
CSSValueID id() const;
CSSValueID functionId() const;
bool hasStringBacking() const;
CSSPropertyID parseAsCSSPropertyID() const;
void serialize(StringBuilder&, const CSSParserToken* nextToken = nullptr) const;
CSSParserToken copyWithUpdatedString(StringView) const;
private:
void initValueFromStringView(StringView string)
{
m_valueLength = string.length();
m_valueIs8Bit = string.is8Bit();
m_valueDataCharRaw = m_valueIs8Bit ? static_cast<const void*>(string.characters8()) : static_cast<const void*>(string.characters16());
}
unsigned m_type : 6; // CSSParserTokenType
unsigned m_blockType : 2; // BlockType
unsigned m_numericValueType : 1; // NumericValueType
unsigned m_numericSign : 2; // NumericSign
unsigned m_unit : 7; // CSSUnitType
unsigned m_nonUnitPrefixLength : 4; // Only for DimensionType, only needs to be long enough for UnicodeRange parsing.
// m_value... is an unpacked StringView so that we can pack it
// tightly with the rest of this object for a smaller object size.
bool m_valueIs8Bit : 1;
unsigned m_valueLength;
const void* m_valueDataCharRaw; // Either LChar* or UChar*.
union {
UChar m_delimiter;
HashTokenType m_hashTokenType;
double m_numericValue;
mutable int m_id;
};
};
} // namespace WebCore
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