/**
* Calculate shipping price without store tax
*
* @param Mage_Sales_Model_Quote_Address $address
* @return Mage_Tax_Model_Sales_Total_Quote_Subtotal
*/
protected function _processShippingAmount($address)
{
if ($this->_areTaxRequestsSimilar) {
return $this;
}
$store = $address->getQuote()->getStore();
$shippingTaxClass = $this->_config->getShippingTaxClass($store);
$shippingAmount = $address->getShippingAmount();
$baseShippingAmount = $address->getBaseShippingAmount();
if ($shippingTaxClass) {
$request = $this->_getStoreTaxRequest($address);
$request->setProductClassId($shippingTaxClass);
$rate = $this->_calculator->getRate($request);
if ($rate) {
$shippingTax = $this->_calculator->calcTaxAmount($shippingAmount, $rate, true, false);
$shippingBaseTax = $this->_calculator->calcTaxAmount($baseShippingAmount, $rate, true, false);
$shippingAmount -= $shippingTax;
$baseShippingAmount -= $shippingBaseTax;
$address->setTotalAmount('shipping', $this->_calculator->roundUp($shippingAmount));
$address->setBaseTotalAmount('shipping', $this->_calculator->roundUp($baseShippingAmount));
}
}
return $this;
}
