computePlatformResolvedLocale method Null safety

Locale? computePlatformResolvedLocale (
  1. List<Locale> supportedLocales
)

Performs the platform-native locale resolution.

Each platform may return different results.

If the platform fails to resolve a locale, then this will return null.

This method returns synchronously and is a direct call to platform specific APIs without invoking method channels.

Implementation

Locale? computePlatformResolvedLocale(List<Locale> supportedLocales) {
  final List<String?> supportedLocalesData = <String?>[];
  for (Locale locale in supportedLocales) {
    supportedLocalesData.add(locale.languageCode);
    supportedLocalesData.add(locale.countryCode);
    supportedLocalesData.add(locale.scriptCode);
  }

  final List<String> result = _computePlatformResolvedLocale(supportedLocalesData);

  if (result.isNotEmpty) {
    return Locale.fromSubtags(
      languageCode: result[0],
      countryCode: result[1] == '' ? null : result[1],
      scriptCode: result[2] == '' ? null : result[2]);
  }
  return null;
}