private function _mergeLayers($sShorthand, $aLayers, $aOldProperties, $bImportant)
{
$this->styleDeclaration->remove($aOldProperties);
$oNewValueList = new PropertyValueList(array(), ',');
foreach ($aLayers as $aValues) {
$oLayerValueList = new PropertyValueList($aValues, ' ');
$oNewValueList->append($oLayerValueList);
}
$oNewProperty = new Property($sShorthand, $oNewValueList);
$oNewProperty->setIsImportant($bImportant);
$this->styleDeclaration->append($oNewProperty);
}
/**
* Reduces a list of values into a PropertyValueList object
*
* @param array $values a list of values
* @param array $delimiters a list of delimiters by order of precedence
**/
protected static function reduceValueList(array $values, $delimiters = array(' ', ',', '/'))
{
/*{{{*/
if (count($values) === 1) {
return $values[0];
}
foreach ($delimiters as $delim) {
$start = null;
while (false !== ($start = array_search($delim, $values, true))) {
$length = 2;
//Number of elements to be joined
for ($i = $start + 2; $i < count($values); $i += 2) {
if ($delim !== $values[$i]) {
break;
}
$length++;
}
$value_list = new PropertyValueList(array(), $delim);
for ($i = $start - 1; $i - $start + 1 < $length * 2; $i += 2) {
$value_list->append($values[$i]);
}
array_splice($values, $start - 1, $length * 2 - 1, array($value_list));
}
}
return $values[0];
}
