Class: HeadMusic::Instrument::Variant

Inherits:
Object
  • Object
show all
Defined in:
lib/head_music/instrument/variant.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key, attributes = {}) ⇒ Variant

Returns a new instance of Variant.



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# File 'lib/head_music/instrument/variant.rb', line 4

def initialize(key, attributes = {})
  @key = key.to_s.to_sym
  @attributes = attributes
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

Returns the value of attribute attributes.



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# File 'lib/head_music/instrument/variant.rb', line 2

def attributes
  @attributes
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/head_music/instrument/variant.rb', line 2

def key
  @key
end

Instance Method Details

#default? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/head_music/instrument/variant.rb', line 27

def default?
  key.to_s == "default"
end

#default_staff_scheme ⇒ Object 



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# File 'lib/head_music/instrument/variant.rb', line 31

def default_staff_scheme
  @default_staff_scheme ||=
    staff_schemes.find(&:default?) || staff_schemes.first
end

#pitch_designation ⇒ Object 



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# File 'lib/head_music/instrument/variant.rb', line 9

def pitch_designation
  return unless attributes["pitch_designation"].to_s != ""

  @pitch_designation ||=
    HeadMusic::Spelling.get(attributes["pitch_designation"])
end

#staff_schemes ⇒ Object 



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# File 'lib/head_music/instrument/variant.rb', line 16

def staff_schemes
  @staff_schemes ||=
    (attributes["staff_schemes"] || {}).map do |key, list|
      HeadMusic::Instrument::StaffScheme.new(
        key: key,
        variant: self,
        list: list
      )
    end
end