longpressWidget function

Future<LongpressResult> longpressWidget(LongpressInput input)

Long-presses a widget or coordinates in the running Flutter app.

Includes a retry loop (500 ms poll until deadline) for "not found" / "No hittable element" errors. Never throws; all error conditions are represented as sealed result cases.

Implementation

Future<LongpressResult> longpressWidget(LongpressInput input) async {
  try {
    final isolateId = await checkFdbHelper();
    if (isolateId == null) return const LongpressNoFdbHelper();

    final deadline = DateTime.now().add(Duration(seconds: input.timeoutSeconds));

    while (true) {
      final params = <String, dynamic>{
        'isolateId': isolateId,
        'duration': input.durationMs.toString(),
      };
      if (input.text != null) params['text'] = input.text;
      if (input.key != null) params['key'] = input.key;
      if (input.type != null) params['type'] = input.type;
      if (input.index != null) params['index'] = input.index.toString();
      if (input.x != null) params['x'] = input.x.toString();
      if (input.y != null) params['y'] = input.y.toString();

      final result = await fdbLongPress(params);

      if (result.isSuccess) {
        final widgetType = input.usedAt ? 'coordinates' : result.widgetType ?? input.type ?? 'widget';
        final pressedX = result.x ?? input.x ?? '';
        final pressedY = result.y ?? input.y ?? '';
        return LongpressSuccess(widgetType: widgetType, x: pressedX, y: pressedY);
      }

      final error = result.error;
      if (error != null) {
        final isRetryable = error.contains('not found') || error.contains('No hittable element');
        if (isRetryable && DateTime.now().isBefore(deadline)) {
          await Future<void>.delayed(const Duration(milliseconds: 500));
          continue;
        }
        return LongpressRelayedError(error);
      }

      return LongpressUnexpectedResponse(result.unexpected.toString());
    }
  } on AppDiedException catch (e) {
    return LongpressAppDied(logLines: e.logLines, reason: e.reason);
  } catch (e) {
    return LongpressError(e.toString());
  }
}