private function coercionFactor($fromUnits, $toUnits)
{
$units = $this->removeCommonUnits($fromUnits, $toUnits);
$fromUnits = $units[0];
$toUnits = $units[1];
while (count($fromUnits) > count($toUnits)) {
$toUnits[] = 'in';
}
if (sizeof($fromUnits) !== sizeof($toUnits) || !$this->areConvertable(array_merge($fromUnits, $toUnits))) {
throw new SassNumberException("Incompatible units: '" . join(' * ', $fromUnits) . "' and '" . join(' * ', $toUnits) . "'", SassScriptParser::$context->node);
}
$coercionFactor = 1;
foreach ($fromUnits as $i => $from) {
if (!isset($toUnits[$i])) {
//workaround for php changes introduced in 5.4, 5.5, 5.6, in php 5.3 the following condition and assignment was not necessary
if (isset($toUnits[$i + 1])) {
$toUnits[$i] = $toUnits[$i + 1];
}
}
/********************* Debug code for those that may want to figure out why this is different in 5.3 vs the others 5.4, 5.5, 5.6
print (" <br> ");
print ("ROW1 i: ");
print_r($i);
print (" : count(fromUnits): " . count($fromUnits) . ":=fromUnits count " );
print (" ");
print (" <br> ");
print ("ROW2 from: ");
print (print_r($from));
print (" ");
print (" <br> ");
print ("ROW3 : ");
print_r($toUnits);
print (" :(toUnits)");
print_r($toUnits[$i]);
print (" :(toUnits[i]) ");
print_r(self::$unitConversion[$from]);
print (" :self::unitConversion[$from]");
print (" ");
print (" <br> ");
********************* Debug code for those that may want to figure out why this is different in 5.3 vs the others 5.4, 5.5, 5.6 *******/
if (array_key_exists($i, $toUnits) && array_key_exists($toUnits[$i], self::$unitConversion)) {
$coercionFactor *= self::$unitConversion[$toUnits[$i]] / self::$unitConversion[$from];
} else {
throw new SassNumberException("Incompatible units: '" . join(' * ', $fromUnits) . "' and '" . join(' * ', $toUnits) . "'", SassScriptParser::$context->node);
}
}
return $coercionFactor;
}
