Class: Scissor::Sequence

Inherits:
Object
  • Object
show all
Defined in:
lib/scissor/sequence.rb

Instance Method Summary collapse

Constructor Details

#initialize(pattern, duration_per_step) ⇒ Sequence

Returns a new instance of Sequence.



3
4
5
6
 
# File 'lib/scissor/sequence.rb', line 3

def initialize(pattern, duration_per_step)
  @pattern = pattern
  @duration_per_step = duration_per_step
end

Instance Method Details

#apply(instruments) ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
# File 'lib/scissor/sequence.rb', line 8

def apply(instruments)
  @pattern.split(//).inject(Scissor()) do |result, c|
    if instruments.include?(c.to_sym)
      instrument = instruments[c.to_sym]

      if instrument.is_a?(Proc)
        instrument = instrument.call(c)
      end

      if @duration_per_step > instrument.duration
        result += instrument + Scissor.silence(@duration_per_step - instrument.duration)
      else
        result += instrument.slice(0, @duration_per_step)
      end
    else
      result += Scissor.silence(@duration_per_step)
    end

    result
  end
end