Class: TTY2::Prompt::Timer

Inherits:
Object
  • Object
show all
Defined in:
lib/tty2/prompt/timer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(duration, interval) ⇒ Timer

Returns a new instance of Timer.



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# File 'lib/tty2/prompt/timer.rb', line 12

def initialize(duration, interval)
  @duration = duration
  @interval = interval
  @total = 0.0
  @current = nil
  @events = []
end

Instance Attribute Details

#duration ⇒ Object (readonly)

Returns the value of attribute duration.



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# File 'lib/tty2/prompt/timer.rb', line 6

def duration
  @duration
end

#interval ⇒ Object (readonly)

Returns the value of attribute interval.



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# File 'lib/tty2/prompt/timer.rb', line 10

def interval
  @interval
end

#total ⇒ Object (readonly)

Returns the value of attribute total.



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# File 'lib/tty2/prompt/timer.rb', line 8

def total
  @total
end

Instance Method Details

#on_tick(&block) ⇒ Object 



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# File 'lib/tty2/prompt/timer.rb', line 36

def on_tick(&block)
  @events << block
end

#runtime ⇒ Object 



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# File 'lib/tty2/prompt/timer.rb', line 32

def runtime
  time_now - @current
end

#start ⇒ Object 



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# File 'lib/tty2/prompt/timer.rb', line 20

def start
  return if @current

  @current = time_now
end

#stop ⇒ Object 



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# File 'lib/tty2/prompt/timer.rb', line 26

def stop
  return unless @current

  @current = nil
end

#time_now ⇒ Object

Object represeting current time



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# File 'lib/tty2/prompt/timer.rb', line 64

def time_now
  ::Process.clock_gettime(Process::CLOCK_MONOTONIC)
end

#while_remaining ⇒ Object 



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# File 'lib/tty2/prompt/timer.rb', line 40

def while_remaining
  start
  remaining = duration

  if @duration
    while remaining >= 0.0
      if runtime >= total
        tick = duration - @total
        @events.each { |block| block.(tick) }
        @total += @interval
      end

      yield(remaining)
      remaining = duration - runtime
    end
  else
    loop { yield }
  end
ensure
  stop
end