Filter.php

1. 9.x drupal/core/vendor/twig/twig/lib/Twig/Filter.php
2. 9.x drupal/core/vendor/twig/twig/lib/Twig/TokenParser/Filter.php
3. 9.x drupal/core/vendor/twig/twig/lib/Twig/Node/Expression/Filter.php

<?php

/*
 * This file is part of Twig.
 *
 * (c) 2009 Fabien Potencier
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * Filters a section of a template by applying filters.
 *
 * <pre>
 * {% filter upper %}
 *  This text becomes uppercase
 * {% endfilter %}
 * </pre>
 */
class Twig_TokenParser_Filter extends Twig_TokenParser {

  /**
   * Parses a token and returns a node.
   *
   * @param Twig_Token $token A Twig_Token instance
   *
   * @return Twig_NodeInterface A Twig_NodeInterface instance
   */
  public function parse(Twig_Token $token) {
    $name = $this->parser
      ->getVarName();
    $ref = new Twig_Node_Expression_BlockReference(new Twig_Node_Expression_Constant($name, $token
      ->getLine()), true, $token
      ->getLine(), $this
      ->getTag());
    $filter = $this->parser
      ->getExpressionParser()
      ->parseFilterExpressionRaw($ref, $this
      ->getTag());
    $this->parser
      ->getStream()
      ->expect(Twig_Token::BLOCK_END_TYPE);
    $body = $this->parser
      ->subparse(array(
      $this,
      'decideBlockEnd',
    ), true);
    $this->parser
      ->getStream()
      ->expect(Twig_Token::BLOCK_END_TYPE);
    $block = new Twig_Node_Block($name, $body, $token
      ->getLine());
    $this->parser
      ->setBlock($name, $block);
    return new Twig_Node_Print($filter, $token
      ->getLine(), $this
      ->getTag());
  }
  public function decideBlockEnd(Twig_Token $token) {
    return $token
      ->test('endfilter');
  }

  /**
   * Gets the tag name associated with this token parser.
   *
   * @return string The tag name
   */
  public function getTag() {
    return 'filter';
  }

}