/**
* Store the current overlay (as it doesn't directly apply to the new scope
* that's being pushed). We want to store the overlay against the next item
* "up" in the stack (hence upIndex), rather than the current item, because
* SSViewer_Scope::obj() has already been called and pushed the new item to
* the stack by this point
* @return SSViewer_Scope
*/
public function pushScope()
{
$scope = parent::pushScope();
$upIndex = $this->getUpIndex();
if ($upIndex !== null) {
$itemStack = $this->getItemStack();
$itemStack[$upIndex][SSViewer_Scope::ITEM_OVERLAY] = $this->overlay;
$this->setItemStack($itemStack);
$this->overlay = array();
}
return $scope;
}
