/**
* Optimizes "for" tag by removing the "loop" variable creation whenever possible.
*
* @param IfwPsn_Vendor_Twig_NodeInterface $node A Node
* @param IfwPsn_Vendor_Twig_Environment $env The current Twig environment
*/
protected function enterOptimizeFor(IfwPsn_Vendor_Twig_NodeInterface $node, IfwPsn_Vendor_Twig_Environment $env)
{
if ($node instanceof IfwPsn_Vendor_Twig_Node_For) {
// disable the loop variable by default
$node->setAttribute('with_loop', false);
array_unshift($this->loops, $node);
} elseif (!$this->loops) {
// we are outside a loop
return;
} elseif ($node instanceof IfwPsn_Vendor_Twig_Node_Expression_Name && 'loop' === $node->getAttribute('name')) {
$this->addLoopToCurrent();
} elseif ($node instanceof IfwPsn_Vendor_Twig_Node_BlockReference || $node instanceof IfwPsn_Vendor_Twig_Node_Expression_BlockReference) {
$this->addLoopToCurrent();
} elseif ($node instanceof IfwPsn_Vendor_Twig_Node_Include && !$node->getAttribute('only')) {
$this->addLoopToAll();
} elseif ($node instanceof IfwPsn_Vendor_Twig_Node_Expression_GetAttr && (!$node->getNode('attribute') instanceof IfwPsn_Vendor_Twig_Node_Expression_Constant || 'parent' === $node->getNode('attribute')->getAttribute('value')) && (true === $this->loops[0]->getAttribute('with_loop') || $node->getNode('node') instanceof IfwPsn_Vendor_Twig_Node_Expression_Name && 'loop' === $node->getNode('node')->getAttribute('name'))) {
$this->addLoopToAll();
}
}
