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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\CssSelector\Parser\Handler;
  13  
  14  use Symfony\Component\CssSelector\Parser\Reader;
  15  use Symfony\Component\CssSelector\Parser\Token;
  16  use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerEscaping;
  17  use Symfony\Component\CssSelector\Parser\Tokenizer\TokenizerPatterns;
  18  use Symfony\Component\CssSelector\Parser\TokenStream;
  19  
  20  /**
  21   * CSS selector comment handler.
  22   *
  23   * This component is a port of the Python cssselect library,
  24   * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
  25   *
  26   * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  27   *
  28   * @internal
  29   */
  30  class IdentifierHandler implements HandlerInterface
  31  {
  32      private $patterns;
  33      private $escaping;
  34  
  35      public function __construct(TokenizerPatterns $patterns, TokenizerEscaping $escaping)
  36      {
  37          $this->patterns = $patterns;
  38          $this->escaping = $escaping;
  39      }
  40  
  41      /**
  42       * {@inheritdoc}
  43       */
  44      public function handle(Reader $reader, TokenStream $stream): bool
  45      {
  46          $match = $reader->findPattern($this->patterns->getIdentifierPattern());
  47  
  48          if (!$match) {
  49              return false;
  50          }
  51  
  52          $value = $this->escaping->escapeUnicode($match[0]);
  53          $stream->push(new Token(Token::TYPE_IDENTIFIER, $value, $reader->getPosition()));
  54          $reader->moveForward(\strlen($match[0]));
  55  
  56          return true;
  57      }
  58  }