public function find($css, $index = null)
{
$xpath = CSS::xpath_for($css);
if (!isset($this->doc) || !isset($this->doc->xpath)) {
return null;
}
if (null === $index) {
return new AHTMLNodeList($this->doc->xpath->query($xpath, $this->node), $this->doc);
} else {
$nl = $this->doc->xpath->query($xpath, $this->node);
if ($index < 0) {
$index = $nl->length + $index;
}
$node = $nl->item($index);
return $node ? new AHTMLNode($node, $this->doc) : null;
}
}
