X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs-website;a=blobdiff_plain;f=vendor%2Fsymfony%2Fcss-selector%2FParser%2FParser.php;fp=vendor%2Fsymfony%2Fcss-selector%2FParser%2FParser.php;h=3c5b2dd264b5060b544f0772e9d84af81a765fd1;hp=0000000000000000000000000000000000000000;hb=a2bd1bf0c2c1f1a17d188f4dc0726a45494cefae;hpb=57c063afa3f66b07c4bbddc2d6129a96d90f0aad diff --git a/vendor/symfony/css-selector/Parser/Parser.php b/vendor/symfony/css-selector/Parser/Parser.php new file mode 100644 index 000000000..3c5b2dd26 --- /dev/null +++ b/vendor/symfony/css-selector/Parser/Parser.php @@ -0,0 +1,401 @@ + + * + * For the full copyright and license information, please view the LICENSE + * file that was distributed with this source code. + */ + +namespace Symfony\Component\CssSelector\Parser; + +use Symfony\Component\CssSelector\Exception\SyntaxErrorException; +use Symfony\Component\CssSelector\Node; +use Symfony\Component\CssSelector\Parser\Tokenizer\Tokenizer; + +/** + * CSS selector parser. + * + * This component is a port of the Python cssselect library, + * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. + * + * @author Jean-François Simon + * + * @internal + */ +class Parser implements ParserInterface +{ + /** + * @var Tokenizer + */ + private $tokenizer; + + /** + * Constructor. + * + * @param null|Tokenizer $tokenizer + */ + public function __construct(Tokenizer $tokenizer = null) + { + $this->tokenizer = $tokenizer ?: new Tokenizer(); + } + + /** + * {@inheritdoc} + */ + public function parse($source) + { + $reader = new Reader($source); + $stream = $this->tokenizer->tokenize($reader); + + return $this->parseSelectorList($stream); + } + + /** + * Parses the arguments for ":nth-child()" and friends. + * + * @param Token[] $tokens + * + * @return array + * + * @throws SyntaxErrorException + */ + public static function parseSeries(array $tokens) + { + foreach ($tokens as $token) { + if ($token->isString()) { + throw SyntaxErrorException::stringAsFunctionArgument(); + } + } + + $joined = trim(implode('', array_map(function (Token $token) { + return $token->getValue(); + }, $tokens))); + + $int = function ($string) { + if (!is_numeric($string)) { + throw SyntaxErrorException::stringAsFunctionArgument(); + } + + return (int) $string; + }; + + switch (true) { + case 'odd' === $joined: + return array(2, 1); + case 'even' === $joined: + return array(2, 0); + case 'n' === $joined: + return array(1, 0); + case false === strpos($joined, 'n'): + return array(0, $int($joined)); + } + + $split = explode('n', $joined); + $first = isset($split[0]) ? $split[0] : null; + + return array( + $first ? ('-' === $first || '+' === $first ? $int($first.'1') : $int($first)) : 1, + isset($split[1]) && $split[1] ? $int($split[1]) : 0, + ); + } + + /** + * Parses selector nodes. + * + * @param TokenStream $stream + * + * @return array + */ + private function parseSelectorList(TokenStream $stream) + { + $stream->skipWhitespace(); + $selectors = array(); + + while (true) { + $selectors[] = $this->parserSelectorNode($stream); + + if ($stream->getPeek()->isDelimiter(array(','))) { + $stream->getNext(); + $stream->skipWhitespace(); + } else { + break; + } + } + + return $selectors; + } + + /** + * Parses next selector or combined node. + * + * @param TokenStream $stream + * + * @return Node\SelectorNode + * + * @throws SyntaxErrorException + */ + private function parserSelectorNode(TokenStream $stream) + { + list($result, $pseudoElement) = $this->parseSimpleSelector($stream); + + while (true) { + $stream->skipWhitespace(); + $peek = $stream->getPeek(); + + if ($peek->isFileEnd() || $peek->isDelimiter(array(','))) { + break; + } + + if (null !== $pseudoElement) { + throw SyntaxErrorException::pseudoElementFound($pseudoElement, 'not at the end of a selector'); + } + + if ($peek->isDelimiter(array('+', '>', '~'))) { + $combinator = $stream->getNext()->getValue(); + $stream->skipWhitespace(); + } else { + $combinator = ' '; + } + + list($nextSelector, $pseudoElement) = $this->parseSimpleSelector($stream); + $result = new Node\CombinedSelectorNode($result, $combinator, $nextSelector); + } + + return new Node\SelectorNode($result, $pseudoElement); + } + + /** + * Parses next simple node (hash, class, pseudo, negation). + * + * @param TokenStream $stream + * @param bool $insideNegation + * + * @return array + * + * @throws SyntaxErrorException + */ + private function parseSimpleSelector(TokenStream $stream, $insideNegation = false) + { + $stream->skipWhitespace(); + + $selectorStart = count($stream->getUsed()); + $result = $this->parseElementNode($stream); + $pseudoElement = null; + + while (true) { + $peek = $stream->getPeek(); + if ($peek->isWhitespace() + || $peek->isFileEnd() + || $peek->isDelimiter(array(',', '+', '>', '~')) + || ($insideNegation && $peek->isDelimiter(array(')'))) + ) { + break; + } + + if (null !== $pseudoElement) { + throw SyntaxErrorException::pseudoElementFound($pseudoElement, 'not at the end of a selector'); + } + + if ($peek->isHash()) { + $result = new Node\HashNode($result, $stream->getNext()->getValue()); + } elseif ($peek->isDelimiter(array('.'))) { + $stream->getNext(); + $result = new Node\ClassNode($result, $stream->getNextIdentifier()); + } elseif ($peek->isDelimiter(array('['))) { + $stream->getNext(); + $result = $this->parseAttributeNode($result, $stream); + } elseif ($peek->isDelimiter(array(':'))) { + $stream->getNext(); + + if ($stream->getPeek()->isDelimiter(array(':'))) { + $stream->getNext(); + $pseudoElement = $stream->getNextIdentifier(); + + continue; + } + + $identifier = $stream->getNextIdentifier(); + if (in_array(strtolower($identifier), array('first-line', 'first-letter', 'before', 'after'))) { + // Special case: CSS 2.1 pseudo-elements can have a single ':'. + // Any new pseudo-element must have two. + $pseudoElement = $identifier; + + continue; + } + + if (!$stream->getPeek()->isDelimiter(array('('))) { + $result = new Node\PseudoNode($result, $identifier); + + continue; + } + + $stream->getNext(); + $stream->skipWhitespace(); + + if ('not' === strtolower($identifier)) { + if ($insideNegation) { + throw SyntaxErrorException::nestedNot(); + } + + list($argument, $argumentPseudoElement) = $this->parseSimpleSelector($stream, true); + $next = $stream->getNext(); + + if (null !== $argumentPseudoElement) { + throw SyntaxErrorException::pseudoElementFound($argumentPseudoElement, 'inside ::not()'); + } + + if (!$next->isDelimiter(array(')'))) { + throw SyntaxErrorException::unexpectedToken('")"', $next); + } + + $result = new Node\NegationNode($result, $argument); + } else { + $arguments = array(); + $next = null; + + while (true) { + $stream->skipWhitespace(); + $next = $stream->getNext(); + + if ($next->isIdentifier() + || $next->isString() + || $next->isNumber() + || $next->isDelimiter(array('+', '-')) + ) { + $arguments[] = $next; + } elseif ($next->isDelimiter(array(')'))) { + break; + } else { + throw SyntaxErrorException::unexpectedToken('an argument', $next); + } + } + + if (empty($arguments)) { + throw SyntaxErrorException::unexpectedToken('at least one argument', $next); + } + + $result = new Node\FunctionNode($result, $identifier, $arguments); + } + } else { + throw SyntaxErrorException::unexpectedToken('selector', $peek); + } + } + + if (count($stream->getUsed()) === $selectorStart) { + throw SyntaxErrorException::unexpectedToken('selector', $stream->getPeek()); + } + + return array($result, $pseudoElement); + } + + /** + * Parses next element node. + * + * @param TokenStream $stream + * + * @return Node\ElementNode + */ + private function parseElementNode(TokenStream $stream) + { + $peek = $stream->getPeek(); + + if ($peek->isIdentifier() || $peek->isDelimiter(array('*'))) { + if ($peek->isIdentifier()) { + $namespace = $stream->getNext()->getValue(); + } else { + $stream->getNext(); + $namespace = null; + } + + if ($stream->getPeek()->isDelimiter(array('|'))) { + $stream->getNext(); + $element = $stream->getNextIdentifierOrStar(); + } else { + $element = $namespace; + $namespace = null; + } + } else { + $element = $namespace = null; + } + + return new Node\ElementNode($namespace, $element); + } + + /** + * Parses next attribute node. + * + * @param Node\NodeInterface $selector + * @param TokenStream $stream + * + * @return Node\AttributeNode + * + * @throws SyntaxErrorException + */ + private function parseAttributeNode(Node\NodeInterface $selector, TokenStream $stream) + { + $stream->skipWhitespace(); + $attribute = $stream->getNextIdentifierOrStar(); + + if (null === $attribute && !$stream->getPeek()->isDelimiter(array('|'))) { + throw SyntaxErrorException::unexpectedToken('"|"', $stream->getPeek()); + } + + if ($stream->getPeek()->isDelimiter(array('|'))) { + $stream->getNext(); + + if ($stream->getPeek()->isDelimiter(array('='))) { + $namespace = null; + $stream->getNext(); + $operator = '|='; + } else { + $namespace = $attribute; + $attribute = $stream->getNextIdentifier(); + $operator = null; + } + } else { + $namespace = $operator = null; + } + + if (null === $operator) { + $stream->skipWhitespace(); + $next = $stream->getNext(); + + if ($next->isDelimiter(array(']'))) { + return new Node\AttributeNode($selector, $namespace, $attribute, 'exists', null); + } elseif ($next->isDelimiter(array('='))) { + $operator = '='; + } elseif ($next->isDelimiter(array('^', '$', '*', '~', '|', '!')) + && $stream->getPeek()->isDelimiter(array('=')) + ) { + $operator = $next->getValue().'='; + $stream->getNext(); + } else { + throw SyntaxErrorException::unexpectedToken('operator', $next); + } + } + + $stream->skipWhitespace(); + $value = $stream->getNext(); + + if ($value->isNumber()) { + // if the value is a number, it's casted into a string + $value = new Token(Token::TYPE_STRING, (string) $value->getValue(), $value->getPosition()); + } + + if (!($value->isIdentifier() || $value->isString())) { + throw SyntaxErrorException::unexpectedToken('string or identifier', $value); + } + + $stream->skipWhitespace(); + $next = $stream->getNext(); + + if (!$next->isDelimiter(array(']'))) { + throw SyntaxErrorException::unexpectedToken('"]"', $next); + } + + return new Node\AttributeNode($selector, $namespace, $attribute, $operator, $value->getValue()); + } +}