vendor/twig/twig/src/TokenParser/BlockTokenParser.php line 40

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  1. <?php
  3. /*
  4. * This file is part of Twig.
  5. *
  6. * (c) Fabien Potencier
  7. * (c) Armin Ronacher
  8. *
  9. * For the full copyright and license information, please view the LICENSE
  10. * file that was distributed with this source code.
  11. */
  13. namespace Twig\TokenParser;
  15. use Twig\Error\SyntaxError;
  16. use Twig\Node\BlockNode;
  17. use Twig\Node\BlockReferenceNode;
  18. use Twig\Node\Node;
  19. use Twig\Node\PrintNode;
  20. use Twig\Token;
  22. /**
  23. * Marks a section of a template as being reusable.
  24. *
  25. * {% block head %}
  26. * <link rel="stylesheet" href="style.css" />
  27. * <title>{% block title %}{% endblock %} - My Webpage</title>
  28. * {% endblock %}
  29. */
  30. final class BlockTokenParser extends AbstractTokenParser
  31. {
  32. public function parse(Token $token)
  33. {
  34. $lineno = $token->getLine();
  35. $stream = $this->parser->getStream();
  36. $name = $stream->expect(/* Token::NAME_TYPE */ 5)->getValue();
  37. if ($this->parser->hasBlock($name)) {
  38. throw new SyntaxError(sprintf("The block '%s' has already been defined line %d.", $name, $this->parser->getBlock($name)->getTemplateLine()), $stream->getCurrent()->getLine(), $stream->getSourceContext());
  39. }
  40. $this->parser->setBlock($name, $block = new BlockNode($name, new Node([]), $lineno));
  41. $this->parser->pushLocalScope();
  42. $this->parser->pushBlockStack($name);
  44. if ($stream->nextIf(/* Token::BLOCK_END_TYPE */ 3)) {
  45. $body = $this->parser->subparse([$this, 'decideBlockEnd'], true);
  46. if ($token = $stream->nextIf(/* Token::NAME_TYPE */ 5)) {
  47. $value = $token->getValue();
  49. if ($value != $name) {
  50. throw new SyntaxError(sprintf('Expected endblock for block "%s" (but "%s" given).', $name, $value), $stream->getCurrent()->getLine(), $stream->getSourceContext());
  51. }
  52. }
  53. } else {
  54. $body = new Node([
  55. new PrintNode($this->parser->getExpressionParser()->parseExpression(), $lineno),
  56. ]);
  57. }
  58. $stream->expect(/* Token::BLOCK_END_TYPE */ 3);
  60. $block->setNode('body', $body);
  61. $this->parser->popBlockStack();
  62. $this->parser->popLocalScope();
  64. return new BlockReferenceNode($name, $lineno, $this->getTag());
  65. }
  67. public function decideBlockEnd(Token $token)
  68. {
  69. return $token->test('endblock');
  70. }
  72. public function getTag()
  73. {
  74. return 'block';
  75. }
  76. }
  78. class_alias('Twig\TokenParser\BlockTokenParser', 'Twig_TokenParser_Block');