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// Copyright 2014 The Chromium Authors. All rights reserved.
// Copyright (C) 2016-2024 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 "CSSParserToken.h"
#include "CSSTokenizerInputStream.h"
#include <climits>
#include <wtf/text/StringView.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class CSSTokenizerInputStream;
class CSSParserObserverWrapper;
class CSSParserTokenRange;
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(CSSTokenizer);
class CSSTokenizer {
WTF_MAKE_NONCOPYABLE(CSSTokenizer);
WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(CSSTokenizer);
public:
static std::unique_ptr<CSSTokenizer> tryCreate(const String&);
static std::unique_ptr<CSSTokenizer> tryCreate(const String&, CSSParserObserverWrapper&); // For the inspector
WEBCORE_EXPORT explicit CSSTokenizer(const String&);
CSSTokenizer(const String&, CSSParserObserverWrapper&); // For the inspector
WEBCORE_EXPORT CSSParserTokenRange tokenRange() const LIFETIME_BOUND;
unsigned tokenCount();
static bool isWhitespace(CSSParserTokenType);
static bool isNewline(UChar);
Vector<String>&& escapedStringsForAdoption() { return WTFMove(m_stringPool); }
private:
CSSTokenizer(const String&, CSSParserObserverWrapper*, bool* constructionSuccess);
CSSParserToken nextToken();
UChar consume();
void reconsume(UChar);
String preprocessString(const String&);
CSSParserToken consumeNumericToken();
CSSParserToken consumeIdentLikeToken();
CSSParserToken consumeNumber();
CSSParserToken consumeStringTokenUntil(UChar);
CSSParserToken consumeURLToken();
void consumeBadUrlRemnants();
void consumeSingleWhitespaceIfNext();
void consumeUntilCommentEndFound();
bool consumeIfNext(UChar);
StringView consumeName();
char32_t consumeEscape();
bool nextTwoCharsAreValidEscape();
bool nextCharsAreNumber(UChar);
bool nextCharsAreNumber();
bool nextCharsAreIdentifier(UChar);
bool nextCharsAreIdentifier();
CSSParserToken blockStart(CSSParserTokenType);
CSSParserToken blockStart(CSSParserTokenType blockType, CSSParserTokenType, StringView);
CSSParserToken blockEnd(CSSParserTokenType, CSSParserTokenType startType);
CSSParserToken newline(UChar);
CSSParserToken whitespace(UChar);
CSSParserToken leftParenthesis(UChar);
CSSParserToken rightParenthesis(UChar);
CSSParserToken leftBracket(UChar);
CSSParserToken rightBracket(UChar);
CSSParserToken leftBrace(UChar);
CSSParserToken rightBrace(UChar);
CSSParserToken plusOrFullStop(UChar);
CSSParserToken comma(UChar);
CSSParserToken hyphenMinus(UChar);
CSSParserToken asterisk(UChar);
CSSParserToken lessThan(UChar);
CSSParserToken solidus(UChar);
CSSParserToken colon(UChar);
CSSParserToken semiColon(UChar);
CSSParserToken hash(UChar);
CSSParserToken circumflexAccent(UChar);
CSSParserToken dollarSign(UChar);
CSSParserToken verticalLine(UChar);
CSSParserToken tilde(UChar);
CSSParserToken commercialAt(UChar);
CSSParserToken reverseSolidus(UChar);
CSSParserToken asciiDigit(UChar);
CSSParserToken letterU(UChar);
CSSParserToken nameStart(UChar);
CSSParserToken stringStart(UChar);
CSSParserToken endOfFile(UChar);
StringView registerString(const String&);
using CodePoint = CSSParserToken (CSSTokenizer::*)(UChar);
static const std::array<CodePoint, 128> codePoints;
Vector<CSSParserTokenType, 8> m_blockStack;
Vector<CSSParserToken, 32> m_tokens;
// We only allocate strings when escapes are used.
Vector<String> m_stringPool;
CSSTokenizerInputStream m_input;
};
} // namespace WebCore
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