twig implementation

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

@@ -0,0 +1,89 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Twig\TokenParser;
+
+use Symfony\Bridge\Twig\Node\TransNode;
+
+/**
+ * Token Parser for the 'trans' tag.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class TransTokenParser 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
+     *
+     * @throws \Twig_Error_Syntax
+     */
+    public function parse(\Twig_Token $token)
+    {
+        $lineno = $token->getLine();
+        $stream = $this->parser->getStream();
+
+        $vars = new \Twig_Node_Expression_Array(array(), $lineno);
+        $domain = null;
+        $locale = null;
+        if (!$stream->test(\Twig_Token::BLOCK_END_TYPE)) {
+            if ($stream->test('with')) {
+                // {% trans with vars %}
+                $stream->next();
+                $vars = $this->parser->getExpressionParser()->parseExpression();
+            }
+
+            if ($stream->test('from')) {
+                // {% trans from "messages" %}
+                $stream->next();
+                $domain = $this->parser->getExpressionParser()->parseExpression();
+            }
+
+            if ($stream->test('into')) {
+                // {% trans into "fr" %}
+                $stream->next();
+                $locale =  $this->parser->getExpressionParser()->parseExpression();
+            } elseif (!$stream->test(\Twig_Token::BLOCK_END_TYPE)) {
+                throw new \Twig_Error_Syntax('Unexpected token. Twig was looking for the "with" or "from" keyword.');
+            }
+        }
+
+        // {% trans %}message{% endtrans %}
+        $stream->expect(\Twig_Token::BLOCK_END_TYPE);
+        $body = $this->parser->subparse(array($this, 'decideTransFork'), true);
+
+        if (!$body instanceof \Twig_Node_Text && !$body instanceof \Twig_Node_Expression) {
+            throw new \Twig_Error_Syntax('A message inside a trans tag must be a simple text');
+        }
+
+        $stream->expect(\Twig_Token::BLOCK_END_TYPE);
+
+        return new TransNode($body, $domain, null, $vars, $locale, $lineno, $this->getTag());
+    }
+
+    public function decideTransFork($token)
+    {
+        return $token->test(array('endtrans'));
+    }
+
+    /**
+     * Gets the tag name associated with this token parser.
+     *
+     * @return string The tag name
+     */
+    public function getTag()
+    {
+        return 'trans';
+    }
+}