79 lines
2.4 KiB
PHP
79 lines
2.4 KiB
PHP
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<?php
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/*
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* This file is part of Twig.
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*
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* (c) Fabien Potencier
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* (c) Armin Ronacher
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Twig\TokenParser;
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use Twig\Error\SyntaxError;
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use Twig\Node\BlockNode;
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use Twig\Node\BlockReferenceNode;
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use Twig\Node\Node;
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use Twig\Node\PrintNode;
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use Twig\Token;
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/**
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* Marks a section of a template as being reusable.
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*
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* {% block head %}
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* <link rel="stylesheet" href="style.css" />
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* <title>{% block title %}{% endblock %} - My Webpage</title>
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* {% endblock %}
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*
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* @internal
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*/
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final class BlockTokenParser extends AbstractTokenParser
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{
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public function parse(Token $token): Node
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{
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$lineno = $token->getLine();
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$stream = $this->parser->getStream();
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$name = $stream->expect(/* Token::NAME_TYPE */ 5)->getValue();
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if ($this->parser->hasBlock($name)) {
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throw new SyntaxError(sprintf("The block '%s' has already been defined line %d.", $name, $this->parser->getBlock($name)->getTemplateLine()), $stream->getCurrent()->getLine(), $stream->getSourceContext());
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}
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$this->parser->setBlock($name, $block = new BlockNode($name, new Node([]), $lineno));
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$this->parser->pushLocalScope();
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$this->parser->pushBlockStack($name);
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if ($stream->nextIf(/* Token::BLOCK_END_TYPE */ 3)) {
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$body = $this->parser->subparse([$this, 'decideBlockEnd'], true);
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if ($token = $stream->nextIf(/* Token::NAME_TYPE */ 5)) {
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$value = $token->getValue();
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if ($value != $name) {
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throw new SyntaxError(sprintf('Expected endblock for block "%s" (but "%s" given).', $name, $value), $stream->getCurrent()->getLine(), $stream->getSourceContext());
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}
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}
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} else {
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$body = new Node([
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new PrintNode($this->parser->getExpressionParser()->parseExpression(), $lineno),
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]);
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}
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$stream->expect(/* Token::BLOCK_END_TYPE */ 3);
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$block->setNode('body', $body);
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$this->parser->popBlockStack();
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$this->parser->popLocalScope();
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return new BlockReferenceNode($name, $lineno, $this->getTag());
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}
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public function decideBlockEnd(Token $token): bool
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{
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return $token->test('endblock');
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}
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public function getTag(): string
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{
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return 'block';
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}
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}
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