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<?php
/*
* This file is part of Twig.
*
* (c) 2010 Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Marks a section of a template as untrusted code that must be evaluated in the sandbox mode.
*
* <pre>
* {% sandbox %}
* {% include 'user.html' %}
* {% endsandbox %}
* </pre>
*
* @see http://www.twig-project.org/doc/api.html#sandbox-extension for details
*/
class Twig_TokenParser_Sandbox extends Twig_TokenParser
{
/**
* Parses a token and returns a node.
*
* @param Twig_Token $token A Twig_Token instance
*
* @return Twig_NodeInterface A Twig_NodeInterface instance
*/
public function parse(Twig_Token $token)
{
$this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
$body = $this->parser->subparse(array($this, 'decideBlockEnd'), true);
$this->parser->getStream()->expect(Twig_Token::BLOCK_END_TYPE);
// in a sandbox tag, only include tags are allowed
if (!$body instanceof Twig_Node_Include) {
foreach ($body as $node) {
if ($node instanceof Twig_Node_Text && ctype_space($node->getAttribute('data'))) {
continue;
}
if (!$node instanceof Twig_Node_Include) {
throw new Twig_Error_Syntax('Only "include" tags are allowed within a "sandbox" section', $node->getLine(), $this->parser->getFilename());
}
}
}
return new Twig_Node_Sandbox($body, $token->getLine(), $this->getTag());
}
public function decideBlockEnd(Twig_Token $token)
{
return $token->test('endsandbox');
}
/**
* Gets the tag name associated with this token parser.
*
* @return string The tag name
*/
public function getTag()
{
return 'sandbox';
}
}
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