class Formatador::ProgressBar

def complete?
  current == total
end

def increment(increment = 1)
  @lock.synchronize do
    return if complete?
    @current += increment.to_i
    @complete_proc.call(self) if complete?
    Formatador.redisplay_progressbar(current, total, opts)
  end
end

def initialize(total, opts = {}, &block)
  @current = opts.delete(:start) || 0
  @total   = total.to_i
  @opts    = opts
  @lock    = Mutex.new
  @complete_proc = block_given? ? block : Proc.new { }
end