|null $lineNumber */ public function __construct(?int $lineNumber = null) { $this->setPosition($lineNumber); } /** * @param array $listDelimiters * * @return Value|string * * @throws UnexpectedTokenException * @throws UnexpectedEOFException * * @internal since V8.8.0 */ public static function parseValue(ParserState $parserState, array $listDelimiters = []) { /** @var list $stack */ $stack = []; $parserState->consumeWhiteSpace(); //Build a list of delimiters and parsed values while ( !($parserState->comes('}') || $parserState->comes(';') || $parserState->comes('!') || $parserState->comes(')') || $parserState->isEnd()) ) { if (\count($stack) > 0) { $foundDelimiter = false; foreach ($listDelimiters as $delimiter) { if ($parserState->comes($delimiter)) { \array_push($stack, $parserState->consume($delimiter)); $parserState->consumeWhiteSpace(); $foundDelimiter = true; break; } } if (!$foundDelimiter) { //Whitespace was the list delimiter \array_push($stack, ' '); } } \array_push($stack, self::parsePrimitiveValue($parserState)); $parserState->consumeWhiteSpace(); } // Convert the list to list objects foreach ($listDelimiters as $delimiter) { $stackSize = \count($stack); if ($stackSize === 1) { return $stack[0]; } $newStack = []; for ($offset = 0; $offset < $stackSize; ++$offset) { if ($offset === ($stackSize - 1) || $delimiter !== $stack[$offset + 1]) { $newStack[] = $stack[$offset]; continue; } $length = 2; //Number of elements to be joined for ($i = $offset + 3; $i < $stackSize; $i += 2, ++$length) { if ($delimiter !== $stack[$i]) { break; } } $list = new RuleValueList($delimiter, $parserState->currentLine()); for ($i = $offset; $i - $offset < $length * 2; $i += 2) { $list->addListComponent($stack[$i]); } $newStack[] = $list; $offset += $length * 2 - 2; } $stack = $newStack; } if (!isset($stack[0])) { throw new UnexpectedTokenException( " {$parserState->peek()} ", $parserState->peek(1, -1) . $parserState->peek(2), 'literal', $parserState->currentLine() ); } return $stack[0]; } /** * @return CSSFunction|string * * @throws UnexpectedEOFException * @throws UnexpectedTokenException * * @internal since V8.8.0 */ public static function parseIdentifierOrFunction(ParserState $parserState, bool $ignoreCase = false) { $anchor = $parserState->anchor(); $result = $parserState->parseIdentifier($ignoreCase); if ($parserState->comes('(')) { $anchor->backtrack(); if ($parserState->streql('url', $result)) { $result = URL::parse($parserState); } elseif ($parserState->streql('calc', $result)) { $result = CalcFunction::parse($parserState); } else { $result = CSSFunction::parse($parserState, $ignoreCase); } } return $result; } /** * @return CSSFunction|CSSString|LineName|Size|URL|string * * @throws UnexpectedEOFException * @throws UnexpectedTokenException * @throws SourceException * * @internal since V8.8.0 */ public static function parsePrimitiveValue(ParserState $parserState) { $value = null; $parserState->consumeWhiteSpace(); if ( \is_numeric($parserState->peek()) || ($parserState->comes('-.') && \is_numeric($parserState->peek(1, 2))) || (($parserState->comes('-') || $parserState->comes('.')) && \is_numeric($parserState->peek(1, 1))) ) { $value = Size::parse($parserState); } elseif ($parserState->comes('#') || $parserState->comes('rgb', true) || $parserState->comes('hsl', true)) { $value = Color::parse($parserState); } elseif ($parserState->comes("'") || $parserState->comes('"')) { $value = CSSString::parse($parserState); } elseif ($parserState->comes('progid:') && $parserState->getSettings()->usesLenientParsing()) { $value = self::parseMicrosoftFilter($parserState); } elseif ($parserState->comes('[')) { $value = LineName::parse($parserState); } elseif ($parserState->comes('U+')) { $value = self::parseUnicodeRangeValue($parserState); } else { $nextCharacter = $parserState->peek(1); try { $value = self::parseIdentifierOrFunction($parserState); } catch (UnexpectedTokenException $e) { if (\in_array($nextCharacter, ['+', '-', '*', '/'], true)) { $value = $parserState->consume(1); } else { throw $e; } } } $parserState->consumeWhiteSpace(); return $value; } /** * @throws UnexpectedEOFException * @throws UnexpectedTokenException */ private static function parseMicrosoftFilter(ParserState $parserState): CSSFunction { $function = $parserState->consumeUntil('(', false, true); $arguments = Value::parseValue($parserState, [',', '=']); return new CSSFunction($function, $arguments, ',', $parserState->currentLine()); } /** * @throws UnexpectedEOFException * @throws UnexpectedTokenException */ private static function parseUnicodeRangeValue(ParserState $parserState): string { $codepointMaxLength = 6; // Code points outside BMP can use up to six digits $range = ''; $parserState->consume('U+'); do { if ($parserState->comes('-')) { $codepointMaxLength = 13; // Max length is 2 six-digit code points + the dash(-) between them } $range .= $parserState->consume(1); } while (\strlen($range) < $codepointMaxLength && \preg_match('/[A-Fa-f0-9\\?-]/', $parserState->peek())); return "U+{$range}"; } }