/**
* Calculates the depth on each call.
*
* It will return at least 1 if the subject node as no children.
*
* @return int
*/
public function depth()
{
if (!$this->node->hasChildren()) {
return 1;
}
$depths = array();
foreach ($this->node->getIterator() as $subnode) {
$depths[] = $subnode->depth();
}
return max($depths) + 1;
}
