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Use.php (1891B)

      1 <?php
      2 
      3 /*
      4  * This file is part of Twig.
      5  *
      6  * (c) 2011 Fabien Potencier
      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 /**
     13  * Imports blocks defined in another template into the current template.
     14  *
     15  * <pre>
     16  * {% extends "base.html" %}
     17  *
     18  * {% use "blocks.html" %}
     19  *
     20  * {% block title %}{% endblock %}
     21  * {% block content %}{% endblock %}
     22  * </pre>
     23  *
     24  * @see http://www.twig-project.org/doc/templates.html#horizontal-reuse for details.
     25  */
     26 class Twig_TokenParser_Use extends Twig_TokenParser
     27 {
     28     public function parse(Twig_Token $token)
     29     {
     30         $template = $this->parser->getExpressionParser()->parseExpression();
     31         $stream = $this->parser->getStream();
     32 
     33         if (!$template instanceof Twig_Node_Expression_Constant) {
     34             throw new Twig_Error_Syntax('The template references in a "use" statement must be a string.', $stream->getCurrent()->getLine(), $stream->getFilename());
     35         }
     36 
     37         $targets = array();
     38         if ($stream->nextIf('with')) {
     39             do {
     40                 $name = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
     41 
     42                 $alias = $name;
     43                 if ($stream->nextIf('as')) {
     44                     $alias = $stream->expect(Twig_Token::NAME_TYPE)->getValue();
     45                 }
     46 
     47                 $targets[$name] = new Twig_Node_Expression_Constant($alias, -1);
     48 
     49                 if (!$stream->nextIf(Twig_Token::PUNCTUATION_TYPE, ',')) {
     50                     break;
     51                 }
     52             } while (true);
     53         }
     54 
     55         $stream->expect(Twig_Token::BLOCK_END_TYPE);
     56 
     57         $this->parser->addTrait(new Twig_Node(array('template' => $template, 'targets' => new Twig_Node($targets))));
     58     }
     59 
     60     public function getTag()
     61     {
     62         return 'use';
     63     }
     64 }