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