startPrint method

@override Future startPrint(String path, String info, { String? printerName, })

Implementation

@override
Future startPrint(String path, String info,{String? printerName}) async {
  // TODO: implement startPrint
  if (path.isEmpty) {
    return {
      "res": false,
      "info": "path is empty"
    };
  }
  var btwFile = File(path);
  if (!btwFile.existsSync()) {
    return {
      "res": false,
      "info": "btwFile is not exist"
    };
  }
  String type = btwFile.path.substring(btwFile.path.lastIndexOf(".") + 1);
  if (type != "btw") {
    return {
      "res": false,
      "info": "$type is an unqualified format"
    };
  }
  ReceivePort receivePort = ReceivePort();
  Isolate backgroundTask = await Isolate.spawn(startBackground, {
    "send": receivePort.sendPort,
    "instance": RootIsolateToken.instance!,
    "path": path,
    "info": info,
    "printerName": printerName
  });
  var resInfo = await receivePort.first;
  backgroundTask.kill(priority: Isolate.immediate);
  receivePort.close();
  return resInfo;
}