vendor/symfony/twig-bridge/Symfony/Bridge/Twig/TokenParser/TransTokenParser.php

   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\Bridge\Twig\TokenParser;
  13
  14 use Symfony\Bridge\Twig\Node\TransNode;
  15
  16 /**
  17  * Token Parser for the 'trans' tag.
  18  *
  19  * @author Fabien Potencier <fabien@symfony.com>
  20  */
  21 class TransTokenParser extends \Twig_TokenParser
  22 {
  23     /**
  24      * Parses a token and returns a node.
  25      *
  26      * @param \Twig_Token $token A Twig_Token instance
  27      *
  28      * @return \Twig_NodeInterface A Twig_NodeInterface instance
  29      *
  30      * @throws \Twig_Error_Syntax
  31      */
  32     public function parse(\Twig_Token $token)
  33     {
  34         $lineno = $token->getLine();
  35         $stream = $this->parser->getStream();
  36
  37         $vars = new \Twig_Node_Expression_Array(array(), $lineno);
  38         $domain = null;
  39         $locale = null;
  40         if (!$stream->test(\Twig_Token::BLOCK_END_TYPE)) {
  41             if ($stream->test('with')) {
  42                 // {% trans with vars %}
  43                 $stream->next();
  44                 $vars = $this->parser->getExpressionParser()->parseExpression();
  45             }
  46
  47             if ($stream->test('from')) {
  48                 // {% trans from "messages" %}
  49                 $stream->next();
  50                 $domain = $this->parser->getExpressionParser()->parseExpression();
  51             }
  52
  53             if ($stream->test('into')) {
  54                 // {% trans into "fr" %}
  55                 $stream->next();
  56                 $locale =  $this->parser->getExpressionParser()->parseExpression();
  57             } elseif (!$stream->test(\Twig_Token::BLOCK_END_TYPE)) {
  58                 throw new \Twig_Error_Syntax('Unexpected token. Twig was looking for the "with" or "from" keyword.');
  59             }
  60         }
  61
  62         // {% trans %}message{% endtrans %}
  63         $stream->expect(\Twig_Token::BLOCK_END_TYPE);
  64         $body = $this->parser->subparse(array($this, 'decideTransFork'), true);
  65
  66         if (!$body instanceof \Twig_Node_Text && !$body instanceof \Twig_Node_Expression) {
  67             throw new \Twig_Error_Syntax('A message inside a trans tag must be a simple text');
  68         }
  69
  70         $stream->expect(\Twig_Token::BLOCK_END_TYPE);
  71
  72         return new TransNode($body, $domain, null, $vars, $locale, $lineno, $this->getTag());
  73     }
  74
  75     public function decideTransFork($token)
  76     {
  77         return $token->test(array('endtrans'));
  78     }
  79
  80     /**
  81      * Gets the tag name associated with this token parser.
  82      *
  83      * @return string The tag name
  84      */
  85     public function getTag()
  86     {
  87         return 'trans';
  88     }
  89 }