Class: Brevity::Itemization

Inherits:
Object
  • Object
show all
Defined in:
lib/brevity/itemization.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(notes: [], dynamic_changes: {}, tempo_changes: {}) ⇒ Itemization

Returns a new instance of Itemization.



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# File 'lib/brevity/itemization.rb', line 5

def initialize notes:[], dynamic_changes:{}, tempo_changes:{}
  @notes = notes
  @dynamic_changes = dynamic_changes
  @tempo_changes = tempo_changes      
  @duration = @notes.map{ |n| n.duration }.each.inject(0.to_r,:+)
end

Instance Attribute Details

#duration ⇒ Object (readonly)

Returns the value of attribute duration.



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# File 'lib/brevity/itemization.rb', line 3

def duration
  @duration
end

#dynamic_changes ⇒ Object (readonly)

Returns the value of attribute dynamic_changes.



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# File 'lib/brevity/itemization.rb', line 3

def dynamic_changes
  @dynamic_changes
end

#notes ⇒ Object (readonly)

Returns the value of attribute notes.



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# File 'lib/brevity/itemization.rb', line 3

def notes
  @notes
end

#tempo_changes ⇒ Object (readonly)

Returns the value of attribute tempo_changes.



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# File 'lib/brevity/itemization.rb', line 3

def tempo_changes
  @tempo_changes
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 20

def ==(other)
  (self.notes == other.notes) &&
  (self.dynamic_changes == other.dynamic_changes) &&
  (self.tempo_changes == other.tempo_changes)
end

#append(other) ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 26

def append other
  self.clone.append! other
end

#append!(other) ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 30

def append! other
  other.dynamic_changes.each do |offset,change|
    @dynamic_changes[offset + @duration] = change
  end
  other.tempo_changes.each do |offset,change|
    @tempo_changes[offset + @duration] = change
  end
  @notes += other.notes
  @duration += other.duration
  
  return self
end

#calc_duration ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 43

def calc_duration
  @notes.each.inject(0.to_r,:+)
end

#clone ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 16

def clone
  Marshal.load(Marshal.dump(self))
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/brevity/itemization.rb', line 12

def eql?(other)
  self == other
end

#stretch(ratio) ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 47

def stretch ratio
  self.clone.stretch! ratio
end

#stretch!(ratio) ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 51

def stretch! ratio
  @notes.each_index do |i|
    n1 = @notes[i]
    @notes[i] = Music::Transcription::Note.new(n1.duration * ratio, n1.pitches, links: n1.links, accent: n1.accent)
  end
  @dynamic_changes = Hash[ @dynamic_changes.map {|k,v| [k*ratio,v] }]
  @tempo_changes = Hash[ @tempo_changes.map {|k,v| [k*ratio,v] }]
  return self
end

#transpose(diff) ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 61

def transpose diff
  self.clone.transpose! diff
end

#transpose!(diff) ⇒ Object 



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# File 'lib/brevity/itemization.rb', line 65

def transpose! diff
  @notes[0...-1].each do |note|
    note.transpose_pitches_and_links! diff
  end
  @notes[-1].transpose_pitches_only! diff
  return self
end