| /// Parses a [rawDouble] `String` to a `double`. |
| /// |
| /// The [rawDouble] might include a unit (`px`, `em` or `ex`) |
| /// which is stripped off when parsed to a `double`. |
| /// |
| /// Passing `null` will return `null`. |
| double? parseDouble(String? rawDouble, {bool tryParse = false}) { |
| assert(tryParse != null); // ignore: unnecessary_null_comparison |
| if (rawDouble == null) { |
| return null; |
| } |
| |
| rawDouble = rawDouble |
| .replaceFirst('rem', '') |
| .replaceFirst('em', '') |
| .replaceFirst('ex', '') |
| .replaceFirst('px', '') |
| .replaceFirst('pt', '') |
| .trim(); |
| |
| if (tryParse) { |
| return double.tryParse(rawDouble); |
| } |
| return double.parse(rawDouble); |
| } |
