SandboxNodeVisitor.php
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<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace WPML\Core\Twig\NodeVisitor;
use WPML\Core\Twig\Environment;
use WPML\Core\Twig\Node\CheckSecurityNode;
use WPML\Core\Twig\Node\CheckToStringNode;
use WPML\Core\Twig\Node\Expression\Binary\ConcatBinary;
use WPML\Core\Twig\Node\Expression\Binary\RangeBinary;
use WPML\Core\Twig\Node\Expression\FilterExpression;
use WPML\Core\Twig\Node\Expression\FunctionExpression;
use WPML\Core\Twig\Node\Expression\GetAttrExpression;
use WPML\Core\Twig\Node\Expression\NameExpression;
use WPML\Core\Twig\Node\ModuleNode;
use WPML\Core\Twig\Node\Node;
use WPML\Core\Twig\Node\PrintNode;
use WPML\Core\Twig\Node\SetNode;
/**
* @final
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class SandboxNodeVisitor extends \WPML\Core\Twig\NodeVisitor\AbstractNodeVisitor
{
protected $inAModule = \false;
protected $tags;
protected $filters;
protected $functions;
private $needsToStringWrap = \false;
protected function doEnterNode(\WPML\Core\Twig\Node\Node $node, \WPML\Core\Twig\Environment $env)
{
if ($node instanceof \WPML\Core\Twig\Node\ModuleNode) {
$this->inAModule = \true;
$this->tags = [];
$this->filters = [];
$this->functions = [];
return $node;
} elseif ($this->inAModule) {
// look for tags
if ($node->getNodeTag() && !isset($this->tags[$node->getNodeTag()])) {
$this->tags[$node->getNodeTag()] = $node;
}
// look for filters
if ($node instanceof \WPML\Core\Twig\Node\Expression\FilterExpression && !isset($this->filters[$node->getNode('filter')->getAttribute('value')])) {
$this->filters[$node->getNode('filter')->getAttribute('value')] = $node;
}
// look for functions
if ($node instanceof \WPML\Core\Twig\Node\Expression\FunctionExpression && !isset($this->functions[$node->getAttribute('name')])) {
$this->functions[$node->getAttribute('name')] = $node;
}
// the .. operator is equivalent to the range() function
if ($node instanceof \WPML\Core\Twig\Node\Expression\Binary\RangeBinary && !isset($this->functions['range'])) {
$this->functions['range'] = $node;
}
if ($node instanceof \WPML\Core\Twig\Node\PrintNode) {
$this->needsToStringWrap = \true;
$this->wrapNode($node, 'expr');
}
if ($node instanceof \WPML\Core\Twig\Node\SetNode && !$node->getAttribute('capture')) {
$this->needsToStringWrap = \true;
}
// wrap outer nodes that can implicitly call __toString()
if ($this->needsToStringWrap) {
if ($node instanceof \WPML\Core\Twig\Node\Expression\Binary\ConcatBinary) {
$this->wrapNode($node, 'left');
$this->wrapNode($node, 'right');
}
if ($node instanceof \WPML\Core\Twig\Node\Expression\FilterExpression) {
$this->wrapNode($node, 'node');
$this->wrapArrayNode($node, 'arguments');
}
if ($node instanceof \WPML\Core\Twig\Node\Expression\FunctionExpression) {
$this->wrapArrayNode($node, 'arguments');
}
}
}
return $node;
}
protected function doLeaveNode(\WPML\Core\Twig\Node\Node $node, \WPML\Core\Twig\Environment $env)
{
if ($node instanceof \WPML\Core\Twig\Node\ModuleNode) {
$this->inAModule = \false;
$node->getNode('constructor_end')->setNode('_security_check', new \WPML\Core\Twig\Node\Node([new \WPML\Core\Twig\Node\CheckSecurityNode($this->filters, $this->tags, $this->functions), $node->getNode('display_start')]));
} elseif ($this->inAModule) {
if ($node instanceof \WPML\Core\Twig\Node\PrintNode || $node instanceof \WPML\Core\Twig\Node\SetNode) {
$this->needsToStringWrap = \false;
}
}
return $node;
}
private function wrapNode(\WPML\Core\Twig\Node\Node $node, $name)
{
$expr = $node->getNode($name);
if ($expr instanceof \WPML\Core\Twig\Node\Expression\NameExpression || $expr instanceof \WPML\Core\Twig\Node\Expression\GetAttrExpression) {
$node->setNode($name, new \WPML\Core\Twig\Node\CheckToStringNode($expr));
}
}
private function wrapArrayNode(\WPML\Core\Twig\Node\Node $node, $name)
{
$args = $node->getNode($name);
foreach ($args as $name => $_) {
$this->wrapNode($args, $name);
}
}
public function getPriority()
{
return 0;
}
}
\class_alias('WPML\\Core\\Twig\\NodeVisitor\\SandboxNodeVisitor', 'WPML\\Core\\Twig_NodeVisitor_Sandbox');