/**
* 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;
}
public function __construct(IfwPsn_Vendor_Twig_NodeInterface $node, IfwPsn_Vendor_Twig_Node_Expression_Constant $filterName, IfwPsn_Vendor_Twig_NodeInterface $arguments, $lineno, $tag = null)
{
$default = new IfwPsn_Vendor_Twig_Node_Expression_Filter($node, new IfwPsn_Vendor_Twig_Node_Expression_Constant('default', $node->getLine()), $arguments, $node->getLine());
if ('default' === $filterName->getAttribute('value') && ($node instanceof IfwPsn_Vendor_Twig_Node_Expression_Name || $node instanceof IfwPsn_Vendor_Twig_Node_Expression_GetAttr)) {
$test = new IfwPsn_Vendor_Twig_Node_Expression_Test_Defined(clone $node, 'defined', new IfwPsn_Vendor_Twig_Node(), $node->getLine());
$false = count($arguments) ? $arguments->getNode(0) : new IfwPsn_Vendor_Twig_Node_Expression_Constant('', $node->getLine());
$node = new IfwPsn_Vendor_Twig_Node_Expression_Conditional($test, $default, $false, $node->getLine());
} else {
$node = $default;
}
parent::__construct($node, $filterName, $arguments, $lineno, $tag);
}
/**
* Adds debugging information.
*
* @param IfwPsn_Vendor_Twig_NodeInterface $node The related twig node
*
* @return IfwPsn_Vendor_Twig_Compiler The current compiler instance
*/
public function addDebugInfo(IfwPsn_Vendor_Twig_NodeInterface $node)
{
if ($node->getLine() != $this->lastLine) {
$this->write(sprintf("// line %d\n", $node->getLine()));
// when mbstring.func_overload is set to 2
// mb_substr_count() replaces substr_count()
// but they have different signatures!
if ((int) ini_get('mbstring.func_overload') & 2) {
// this is much slower than the "right" version
$this->sourceLine += mb_substr_count(mb_substr($this->source, $this->sourceOffset), "\n");
} else {
$this->sourceLine += substr_count($this->source, "\n", $this->sourceOffset);
}
$this->sourceOffset = strlen($this->source);
$this->debugInfo[$this->sourceLine] = $node->getLine();
$this->lastLine = $node->getLine();
}
return $this;
}
protected function checkLoopUsageBody(IfwPsn_Vendor_Twig_TokenStream $stream, IfwPsn_Vendor_Twig_NodeInterface $node)
{
if ($node instanceof IfwPsn_Vendor_Twig_Node_Expression_GetAttr && $node->getNode('node') instanceof IfwPsn_Vendor_Twig_Node_Expression_Name && 'loop' == $node->getNode('node')->getAttribute('name')) {
$attribute = $node->getNode('attribute');
if ($attribute instanceof IfwPsn_Vendor_Twig_Node_Expression_Constant && in_array($attribute->getAttribute('value'), array('length', 'revindex0', 'revindex', 'last'))) {
throw new IfwPsn_Vendor_Twig_Error_Syntax(sprintf('The "loop.%s" variable is not defined when looping with a condition', $attribute->getAttribute('value')), $node->getLine(), $stream->getFilename());
}
}
// should check for parent.loop.XXX usage
if ($node instanceof IfwPsn_Vendor_Twig_Node_For) {
return;
}
foreach ($node as $n) {
if (!$n) {
continue;
}
$this->checkLoopUsageBody($stream, $n);
}
}
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 $node;
}
protected function getEscaperFilter($type, IfwPsn_Vendor_Twig_NodeInterface $node)
{
$line = $node->getLine();
$name = new IfwPsn_Vendor_Twig_Node_Expression_Constant('escape', $line);
$args = new IfwPsn_Vendor_Twig_Node(array(new IfwPsn_Vendor_Twig_Node_Expression_Constant((string) $type, $line), new IfwPsn_Vendor_Twig_Node_Expression_Constant(null, $line), new IfwPsn_Vendor_Twig_Node_Expression_Constant(true, $line)));
return new IfwPsn_Vendor_Twig_Node_Expression_Filter($node, $name, $args, $line);
}
public function parseTestExpression(IfwPsn_Vendor_Twig_Parser $parser, IfwPsn_Vendor_Twig_NodeInterface $node)
{
$stream = $parser->getStream();
$name = $stream->expect(IfwPsn_Vendor_Twig_Token::NAME_TYPE)->getValue();
$class = $this->getTestNodeClass($parser, $name, $node->getLine());
$arguments = null;
if ($stream->test(IfwPsn_Vendor_Twig_Token::PUNCTUATION_TYPE, '(')) {
$arguments = $parser->getExpressionParser()->parseArguments(true);
}
return new $class($node, $name, $arguments, $parser->getCurrentToken()->getLine());
}
/**
* 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();
}
}
