diff core/lib/Drupal/Core/Template/TwigTransTokenParser.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/Template/TwigTransTokenParser.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,103 @@
+<?php
+
+namespace Drupal\Core\Template;
+
+/**
+ * A class that defines the Twig 'trans' token parser for Drupal.
+ *
+ * The token parser converts a token stream created from template source
+ * code into an Abstract Syntax Tree (AST).  The AST will later be compiled
+ * into PHP code usable for runtime execution of the template.
+ *
+ * @see \Twig_TokenParser
+ * @see http://twig.sensiolabs.org/doc/extensions/i18n.html
+ * @see https://github.com/fabpot/Twig-extensions
+ */
+class TwigTransTokenParser extends \Twig_TokenParser {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function parse(\Twig_Token $token) {
+    $lineno = $token->getLine();
+    $stream = $this->parser->getStream();
+    $body = NULL;
+    $options = NULL;
+    $count = NULL;
+    $plural = NULL;
+
+    if (!$stream->test(\Twig_Token::BLOCK_END_TYPE) && $stream->test(\Twig_Token::STRING_TYPE)) {
+      $body = $this->parser->getExpressionParser()->parseExpression();
+    }
+    if (!$stream->test(\Twig_Token::BLOCK_END_TYPE) && $stream->test(\Twig_Token::NAME_TYPE, 'with')) {
+      $stream->next();
+      $options = $this->parser->getExpressionParser()->parseExpression();
+    }
+    if (!$body) {
+      $stream->expect(\Twig_Token::BLOCK_END_TYPE);
+      $body = $this->parser->subparse([$this, 'decideForFork']);
+      if ('plural' === $stream->next()->getValue()) {
+        $count = $this->parser->getExpressionParser()->parseExpression();
+        $stream->expect(\Twig_Token::BLOCK_END_TYPE);
+        $plural = $this->parser->subparse([$this, 'decideForEnd'], TRUE);
+      }
+    }
+
+    $stream->expect(\Twig_Token::BLOCK_END_TYPE);
+
+    $this->checkTransString($body, $lineno);
+
+    $node = new TwigNodeTrans($body, $plural, $count, $options, $lineno, $this->getTag());
+
+    return $node;
+  }
+
+  /**
+   * Detect a 'plural' switch or the end of a 'trans' tag.
+   */
+  public function decideForFork($token) {
+    return $token->test(['plural', 'endtrans']);
+  }
+
+  /**
+   * Detect the end of a 'trans' tag.
+   */
+  public function decideForEnd($token) {
+    return $token->test('endtrans');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getTag() {
+    return 'trans';
+  }
+
+  /**
+   * Ensure that any nodes that are parsed are only of allowed types.
+   *
+   * @param \Twig_Node $body
+   *   The expression to check.
+   * @param int $lineno
+   *   The source line.
+   *
+   * @throws \Twig_Error_Syntax
+   */
+  protected function checkTransString(\Twig_Node $body, $lineno) {
+    foreach ($body as $node) {
+      if (
+        $node instanceof \Twig_Node_Text
+        ||
+        ($node instanceof \Twig_Node_Print && $node->getNode('expr') instanceof \Twig_Node_Expression_Name)
+        ||
+        ($node instanceof \Twig_Node_Print && $node->getNode('expr') instanceof \Twig_Node_Expression_GetAttr)
+        ||
+        ($node instanceof \Twig_Node_Print && $node->getNode('expr') instanceof \Twig_Node_Expression_Filter)
+      ) {
+        continue;
+      }
+      throw new \Twig_Error_Syntax(sprintf('The text to be translated with "trans" can only contain references to simple variables'), $lineno);
+    }
+  }
+
+}