/**
* Called before child nodes are visited.
*
* @param IfwPsn_Vendor_Twig_NodeInterface $node The node to visit
* @param IfwPsn_Vendor_Twig_Environment $env The Twig environment instance
*
* @return IfwPsn_Vendor_Twig_NodeInterface The modified node
*/
public function enterNode(IfwPsn_Vendor_Twig_NodeInterface $node, IfwPsn_Vendor_Twig_Environment $env)
{
if ($node instanceof IfwPsn_Vendor_Twig_Node_Module) {
if ($env->hasExtension('escaper') && ($defaultStrategy = $env->getExtension('escaper')->getDefaultStrategy($node->getAttribute('filename')))) {
$this->defaultStrategy = $defaultStrategy;
}
$this->safeVars = array();
} elseif ($node instanceof IfwPsn_Vendor_Twig_Node_AutoEscape) {
$this->statusStack[] = $node->getAttribute('value');
} elseif ($node instanceof IfwPsn_Vendor_Twig_Node_Block) {
$this->statusStack[] = isset($this->blocks[$node->getAttribute('name')]) ? $this->blocks[$node->getAttribute('name')] : $this->needEscaping($env);
} elseif ($node instanceof IfwPsn_Vendor_Twig_Node_Import) {
$this->safeVars[] = $node->getNode('var')->getAttribute('name');
}
return $node;
}
/**
* Called before child nodes are visited.
*
* @param IfwPsn_Vendor_Twig_NodeInterface $node The node to visit
* @param IfwPsn_Vendor_Twig_Environment $env The Twig environment instance
*
* @return IfwPsn_Vendor_Twig_NodeInterface The modified node
*/
public function enterNode(IfwPsn_Vendor_Twig_NodeInterface $node, IfwPsn_Vendor_Twig_Environment $env)
{
if ($node instanceof IfwPsn_Vendor_Twig_Node_Module) {
$this->inAModule = true;
$this->tags = array();
$this->filters = array();
$this->functions = array();
return $node;
} elseif ($this->inAModule) {
// look for tags
if ($node->getNodeTag()) {
$this->tags[] = $node->getNodeTag();
}
// look for filters
if ($node instanceof IfwPsn_Vendor_Twig_Node_Expression_Filter) {
$this->filters[] = $node->getNode('filter')->getAttribute('value');
}
// look for functions
if ($node instanceof IfwPsn_Vendor_Twig_Node_Expression_Function) {
$this->functions[] = $node->getAttribute('name');
}
// wrap print to check __toString() calls
if ($node instanceof IfwPsn_Vendor_Twig_Node_Print) {
return new IfwPsn_Vendor_Twig_Node_SandboxedPrint($node->getNode('expr'), $node->getLine(), $node->getNodeTag());
}
}
return $node;
}
/**
* Compiles a node.
*
* @param IfwPsn_Vendor_Twig_NodeInterface $node The node to compile
* @param integer $indentation The current indentation
*
* @return IfwPsn_Vendor_Twig_Compiler The current compiler instance
*/
public function compile(IfwPsn_Vendor_Twig_NodeInterface $node, $indentation = 0)
{
$this->lastLine = null;
$this->source = '';
$this->sourceOffset = 0;
// source code starts at 1 (as we then increment it when we encounter new lines)
$this->sourceLine = 1;
$this->indentation = $indentation;
if ($node instanceof IfwPsn_Vendor_Twig_Node_Module) {
$this->filename = $node->getAttribute('filename');
}
$node->compile($this);
return $this;
}
protected function filterBodyNodes(IfwPsn_Vendor_Twig_NodeInterface $node)
{
// check that the body does not contain non-empty output nodes
if ($node instanceof IfwPsn_Vendor_Twig_Node_Text && !ctype_space($node->getAttribute('data')) || !$node instanceof IfwPsn_Vendor_Twig_Node_Text && !$node instanceof IfwPsn_Vendor_Twig_Node_BlockReference && $node instanceof IfwPsn_Vendor_Twig_NodeOutputInterface) {
if (false !== strpos((string) $node, chr(0xef) . chr(0xbb) . chr(0xbf))) {
throw new IfwPsn_Vendor_Twig_Error_Syntax('A template that extends another one cannot have a body but a byte order mark (BOM) has been detected; it must be removed.', $node->getLine(), $this->getFilename());
}
throw new IfwPsn_Vendor_Twig_Error_Syntax('A template that extends another one cannot have a body.', $node->getLine(), $this->getFilename());
}
// bypass "set" nodes as they "capture" the output
if ($node instanceof IfwPsn_Vendor_Twig_Node_Set) {
return $node;
}
if ($node instanceof IfwPsn_Vendor_Twig_NodeOutputInterface) {
return;
}
foreach ($node as $k => $n) {
if (null !== $n && null === $this->filterBodyNodes($n)) {
$node->removeNode($k);
}
}
return $node;
}
