nativeRtl function

bool? nativeRtl(BuildContext context, TextDirection? explicit)

The text direction a native view is laid out in (#142): explicit, or the ambient Directionality. As the rtl creation parameter: true or false, or null to leave the system's direction (no Directionality).

UIKit and AppKit lay views out by the app's language, which an app that picks its language in Dart never tells them about, so the native views take Flutter's direction instead.

Implementation

bool? nativeRtl(BuildContext context, TextDirection? explicit) {
  final direction = explicit ?? Directionality.maybeOf(context);
  if (direction == null) return null;
  return direction == TextDirection.rtl;
}