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- <?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);
- }
- }
- }
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