Class: Dispel::Keyboard

Inherits:
Object
  • Object
show all
Defined in:
lib/dispel/keyboard.rb

Constant Summary collapse

MAX_CHAR = 
255
ENTER = 
13
ESCAPE = 
27
IS_18 = 
RUBY_VERSION =~ /^1\.8/
SEQUENCE_TIMEOUT = 
0.005
NOTHING =

getch returns this as 'nothing' on 1.8 but nil on 1.9.2

(2**32 - 1)
A_TO_Z = 
('a'..'z').to_a
DEFAULT_INPUT = 
lambda { Curses.getch }

Class Method Summary collapse

Class Method Details

.input(&block) ⇒ Object 



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# File 'lib/dispel/keyboard.rb', line 14

def self.input(&block)
  @input = block
end

.output(options = {}, &block) ⇒ Object 



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# File 'lib/dispel/keyboard.rb', line 18

def self.output(options={}, &block)
  @sequence = []
  @started = Time.now.to_f
  timeout = options[:timeout]

  if timeout && SEQUENCE_TIMEOUT > timeout
    raise "Timeout must be higher then SEQUENCE_TIMEOUT (#{SEQUENCE_TIMEOUT})"
  end

  loop do
    @now = Time.now.to_f
    @elapsed = @now - @started

    key = fetch_user_input

    # finish previous sequence
    if @sequence.any? and @elapsed > SEQUENCE_TIMEOUT
      sequence_to_keys(@sequence).each(&block)
      @sequence = []
    end

    if key # start new sequence
      @started = @now
      @sequence << key
    elsif timeout and @elapsed > timeout
      @started = @now
      yield :timeout
    else
      sleep SEQUENCE_TIMEOUT # nothing happening -> sleep a bit to save cpu
    end
  end
end