inc/3rdparty/Twig/Extensions/TokenParser/Trans.php

   1 <?php
   2
   3 /*
   4  * This file is part of Twig.
   5  *
   6  * (c) 2010 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 class Twig_Extensions_TokenParser_Trans extends Twig_TokenParser
  12 {
  13     /**
  14      * Parses a token and returns a node.
  15      *
  16      * @param Twig_Token $token A Twig_Token instance
  17      *
  18      * @return Twig_NodeInterface A Twig_NodeInterface instance
  19      */
  20     public function parse(Twig_Token $token)
  21     {
  22         $lineno = $token->getLine();
  23         $stream = $this->parser->getStream();
  24         $count = null;
  25         $plural = null;
  26
  27         if (!$stream->test(Twig_Token::BLOCK_END_TYPE)) {
  28             $body = $this->parser->getExpressionParser()->parseExpression();
  29         } else {
  30             $stream->expect(Twig_Token::BLOCK_END_TYPE);
  31             $body = $this->parser->subparse(array($this, 'decideForFork'));
  32             if ('plural' === $stream->next()->getValue()) {
  33                 $count = $this->parser->getExpressionParser()->parseExpression();
  34                 $stream->expect(Twig_Token::BLOCK_END_TYPE);
  35                 $plural = $this->parser->subparse(array($this, 'decideForEnd'), true);
  36             }
  37         }
  38
  39         $stream->expect(Twig_Token::BLOCK_END_TYPE);
  40
  41         $this->checkTransString($body, $lineno);
  42
  43         return new Twig_Extensions_Node_Trans($body, $plural, $count, $lineno, $this->getTag());
  44     }
  45
  46     public function decideForFork(Twig_Token $token)
  47     {
  48         return $token->test(array('plural', 'endtrans'));
  49     }
  50
  51     public function decideForEnd(Twig_Token $token)
  52     {
  53         return $token->test('endtrans');
  54     }
  55
  56     /**
  57      * Gets the tag name associated with this token parser.
  58      *
  59      * @param string The tag name
  60      */
  61     public function getTag()
  62     {
  63         return 'trans';
  64     }
  65
  66     protected function checkTransString(Twig_NodeInterface $body, $lineno)
  67     {
  68         foreach ($body as $i => $node) {
  69             if (
  70                 $node instanceof Twig_Node_Text
  71                 ||
  72                 ($node instanceof Twig_Node_Print && $node->getNode('expr') instanceof Twig_Node_Expression_Name)
  73             ) {
  74                 continue;
  75             }
  76
  77             throw new Twig_Error_Syntax(sprintf('The text to be translated with "trans" can only contain references to simple variables'), $lineno);
  78         }
  79     }
  80 }