log too long

[hongqinghe]

Android studio log is too long to display incomplete, can you support it?

[haarts]

Android Studio seems to have a maximum length on a log line. It would be good for us to detect we're printing to Android logcat and split the lines. But I have no idea if that can be done. In the meanwhile please check out this SO answer, it might help.

[Nstd]

@hongqinghe you can extend PrettyPrinter and override stringifyMessage() method, to add line break character if message is to long.

[haarts]

There's even a lineLength constructor argument which you could use! Better yet, there's a terminalColumns property which you could use. This, too, I'd like to implement but it is not terribly high on my todo list.

[Nstd]

lineLength maybe just used to set divider length, not the log length.

[haarts]

I'm sure it is only used for the divider length. I've been thinking a bit about this and hard wrapping is only desirable if the terminal/console truncates the lines. This only happens with the IDE consoles. What would be best is to use the terminalColums in combination with some way of detecting that we're printing in an IDE console. A good heuristic might be using stdoutSupportsAnsi. The IDE consoles are the only consoles who do NOT support ANSI escapes.

[Yongle-Fu]

class FocusPrinter extends LogPrinter {
  static final levelPrefixes = {
    Level.verbose: '[V]',
    Level.debug: '[D]',
    Level.info: '[I]',
    Level.warning: '[W]',
    Level.error: '[E]',
    Level.wtf: '[WTF]',
  };

  final bool printTime;
  final formatter = DateFormat('HH:mm:ss');

  FocusPrinter({this.printTime = true});

  @override
  List<String> log(LogEvent event) {
    var messageStr = _stringifyMessage(event.message);
    var errorStr = event.error != null ? '  ERROR: ${event.error}' : '';
    return ['${_labelFor(event.level)} $messageStr$errorStr'];
  }

  String _labelFor(Level level) {
    var prefix = levelPrefixes[level];
    var timeStr = printTime ? '${formatter.format(DateTime.now())}' : '';
    var stackTraceStr = StackTrace.current
        .toString()
        .split('\n')[4]
        .replaceFirst(RegExp(r'#\d+\s+'), '');
    return '$prefix $timeStr, $stackTraceStr,';
  }

  String _stringifyMessage(dynamic message) {
    if (message is Map || message is Iterable) {
      var encoder = JsonEncoder.withIndent(null);
      return encoder.convert(message);
    } else {
      return message.toString();
    }
  }
}

[liudonghua123]

In my code, I use var logger = Logger(printer: SimplePrinter(printTime: true), filter: ProductionFilter());;