�PNG  IHDR��;���IDATx��ܻn�0���K�� �)(�pA��� ���7�LeG{�� �§㻢|��ذaÆ 6lذaÆ 6lذaÆ 6lom��$^�y���ذag�5bÆ 6lذaÆ 6lذa{���� 6lذaÆ �`����}H�Fkm�,�m����Ӫ���ô�ô!� �x�|'ܢ˟;�E:���9�&ᶒ�}�{�v]�n&�6� �h��_��t�ڠ͵-ҫ���Z;��Z$�.�P���k�ž)�!��o���>}l�eQfJ�T��u і���چ��\��X=8��Rن4`Vw�l�>����n�G�^��i�s��"ms�$�u��i��?w�bs[m�6�K4���O���.�4��%����/����b�C%��t ��M�ז� �-l�G6�mrz2���s�%�9��s@���-�k�9�=���)������k�B5����\��+͂�Zsٲ ��Rn��~G���R���C����� �wIcI��n7jJ���hۛNCS|���j0��8y�iHKֶۛ�k�Ɉ+;Sz������L/��F�*\��Ԕ�#"5��m�2��[S��������=�g��n�a�P�e�ғ�L�� lذaÆ 6l�^k��̱aÆ 6lذaÆ 6lذa;���� �_��ذaÆ 6lذaÆ 6lذaÆ ���R���IEND�B` * * 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\InternalErrorException; use Symfony\Component\CssSelector\Exception\SyntaxErrorException; /** * CSS selector token stream. * * 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 TokenStream { /** * @var Token[] */ private $tokens = []; /** * @var Token[] */ private $used = []; /** * @var int */ private $cursor = 0; /** * @var Token|null */ private $peeked; /** * @var bool */ private $peeking = false; /** * Pushes a token. * * @return $this */ public function push(Token $token): self { $this->tokens[] = $token; return $this; } /** * Freezes stream. * * @return $this */ public function freeze(): self { return $this; } /** * Returns next token. * * @throws InternalErrorException If there is no more token */ public function getNext(): Token { if ($this->peeking) { $this->peeking = false; $this->used[] = $this->peeked; return $this->peeked; } if (!isset($this->tokens[$this->cursor])) { throw new InternalErrorException('Unexpected token stream end.'); } return $this->tokens[$this->cursor++]; } /** * Returns peeked token. */ public function getPeek(): Token { if (!$this->peeking) { $this->peeked = $this->getNext(); $this->peeking = true; } return $this->peeked; } /** * Returns used tokens. * * @return Token[] */ public function getUsed(): array { return $this->used; } /** * Returns nex identifier token. * * @return string The identifier token value * * @throws SyntaxErrorException If next token is not an identifier */ public function getNextIdentifier(): string { $next = $this->getNext(); if (!$next->isIdentifier()) { throw SyntaxErrorException::unexpectedToken('identifier', $next); } return $next->getValue(); } /** * Returns nex identifier or star delimiter token. * * @return string|null The identifier token value or null if star found * * @throws SyntaxErrorException If next token is not an identifier or a star delimiter */ public function getNextIdentifierOrStar(): ?string { $next = $this->getNext(); if ($next->isIdentifier()) { return $next->getValue(); } if ($next->isDelimiter(['*'])) { return null; } throw SyntaxErrorException::unexpectedToken('identifier or "*"', $next); } /** * Skips next whitespace if any. */ public function skipWhitespace() { $peek = $this->getPeek(); if ($peek->isWhitespace()) { $this->getNext(); } } }