    stream[ESCAPE_DECODER].next(character);
            // Escape letter at the tail position
            if (length === string.length && character === kEscape) {
              timeoutId = setTimeout(triggerEscape, escapeCodeTimeout);
            }
          } catch (err) {
            // If the generator throws (it could happen in the `keypress`
            // event), we need to restart it.
            stream[ESCAPE_DECODER] = emitKeys(stream);
            stream[ESCAPE_DECODER].next();
            throw err;
          }
        }
      }
    } else {
      // Nobody's watching anyway
      stream.removeListener('data', onData);
      stream.on('newListener', onNewListener);
    }
  }

  function onNewListener(event) {
    if (event === 'keypress') {
      stream.on('data', onData);
      stream.removeListener('newListener', onNewListener);
    }
  }

  if (stream.listenerCount('keypress') > 0) {
    stream.on('data', onData);
  } else {
    stream.on('newListener', onNewListener);
  }
}

module.exports = emitKeypressEvents;
