/**
* Operates with the dimension. In an operation between two dimensions,
* we default to the first Dimension's unit,
* so `1px + 2` will yield `3px`.
*
* @param ILess_Environment $env
* @param string $op
* @param ILess_Node_Dimension $other
* @return ILess_Node_Dimension
* @throws ILess_CompilerException
*/
public function operate(ILess_Environment $env, $op, ILess_Node_Dimension $other)
{
$value = ILess_Math::operate($op, $this->value, $other->value);
$unit = clone $this->unit;
if ($op === '+' || $op === '-') {
if (!count($unit->numerator) && !count($unit->denominator)) {
$unit->numerator = $other->unit->numerator;
$unit->denominator = $other->unit->denominator;
} elseif (!count($other->unit->numerator) && !count($other->unit->denominator)) {
// do nothing
} else {
$other = $other->convertTo($this->unit->usedUnits());
if ($env->strictUnits && $other->unit->toString() !== $unit->toString()) {
throw new ILess_Exception_Compiler(sprintf('Incompatible units. Change the units or use the unit function. Bad units: \'%s\' and \'%s\'.', $unit->toString(), $other->unit->toString()));
}
$value = ILess_Math::operate($op, $this->value, $other->value);
}
} elseif ($op === '*') {
$unit->numerator = array_merge($unit->numerator, $other->unit->numerator);
$unit->denominator = array_merge($unit->denominator, $other->unit->denominator);
sort($unit->numerator);
sort($unit->denominator);
$unit->cancel();
} elseif ($op === '/') {
$unit->numerator = array_merge($unit->numerator, $other->unit->denominator);
$unit->denominator = array_merge($unit->denominator, $other->unit->numerator);
sort($unit->numerator);
sort($unit->denominator);
$unit->cancel();
}
return new ILess_Node_Dimension($value, $unit);
}
/**
* Compares two units
*
* @param ILess_Node_DimensionUnit $other
* @return integer| 0 or -1
*/
public function compare(ILess_Node_DimensionUnit $other)
{
return $this->is($other->toString()) ? 0 : -1;
}
