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