titanscssc::matchExtendsSingle PHP Method

    protected function matchExtendsSingle($single, &$outOrigin)
    {
        $counts = array();
        foreach ($single as $part) {
            if (!is_string($part)) {
                return false;
            }
            // hmm
            if (isset($this->extendsMap[$part])) {
                foreach ($this->extendsMap[$part] as $idx) {
                    $counts[$idx] = isset($counts[$idx]) ? $counts[$idx] + 1 : 1;
                }
            }
        }
        $outOrigin = array();
        $found = false;
        foreach ($counts as $idx => $count) {
            list($target, $origin) = $this->extends[$idx];
            // check count
            if ($count != count($target)) {
                continue;
            }
            // check if target is subset of single
            if (array_diff(array_intersect($single, $target), $target)) {
                continue;
            }
            $rem = array_diff($single, $target);
            foreach ($origin as $j => $new) {
                // prevent infinite loop when target extends itself
                foreach ($new as $new_selector) {
                    if (!array_diff($single, $new_selector)) {
                        continue 2;
                    }
                }
                $origin[$j][count($origin[$j]) - 1] = $this->combineSelectorSingle(end($new), $rem);
            }
            $outOrigin = array_merge($outOrigin, $origin);
            $found = true;
        }
        return $found;
    }