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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\Shortcut;
  13  
  14  use Symfony\Component\CssSelector\Node\ElementNode;
  15  use Symfony\Component\CssSelector\Node\HashNode;
  16  use Symfony\Component\CssSelector\Node\SelectorNode;
  17  use Symfony\Component\CssSelector\Parser\ParserInterface;
  18  
  19  /**
  20   * CSS selector hash parser shortcut.
  21   *
  22   * This component is a port of the Python cssselect library,
  23   * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
  24   *
  25   * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
  26   *
  27   * @internal
  28   */
  29  class HashParser implements ParserInterface
  30  {
  31      /**
  32       * {@inheritdoc}
  33       */
  34      public function parse(string $source): array
  35      {
  36          // Matches an optional namespace, optional element, and required id
  37          // $source = 'test|input#ab6bd_field';
  38          // $matches = array (size=4)
  39          //     0 => string 'test|input#ab6bd_field' (length=22)
  40          //     1 => string 'test' (length=4)
  41          //     2 => string 'input' (length=5)
  42          //     3 => string 'ab6bd_field' (length=11)
  43          if (preg_match('/^(?:([a-z]++)\|)?+([\w-]++|\*)?+#([\w-]++)$/i', trim($source), $matches)) {
  44              return [
  45                  new SelectorNode(new HashNode(new ElementNode($matches[1] ?: null, $matches[2] ?: null), $matches[3])),
  46              ];
  47          }
  48  
  49          return [];
  50      }
  51  }