Class: HeadMusic::Instrument

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

Overview

A musical instrument. An instrument object can be assigned to a staff object. Attributes:

name_key: the name of the instrument
alias_name_keys: an array of alternative names for the instrument
orchestra_section_key: the section of the orchestra (e.g. "strings")
family_key: the key for the family of the instrument (e.g. "saxophone")
classification_keys: an array of classification_keys
default_clefs: the default clef or system of clefs for the instrument
  - [treble] for instruments that use the treble clef
  - [treble, bass] for instruments that use the grand staff
variants:
  a hash of default and alternative pitch designations

Associations:

family: the family of the instrument (e.g. "saxophone")
orchestra_section: the section of the orchestra (e.g. "strings")

Defined Under Namespace

Classes: Staff, StaffScheme, Variant

Constant Summary collapse

INSTRUMENTS = 
YAML.load_file(File.expand_path("data/instruments.yml", __dir__)).freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Named

#ensure_localized_name, included, #localized_name, #localized_names, #name, #name=

Instance Attribute Details

#alias_name_keys ⇒ Object (readonly)

Returns the value of attribute alias_name_keys.



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# File 'lib/head_music/instrument.rb', line 32

def alias_name_keys
  @alias_name_keys
end

#classification_keys ⇒ Object (readonly)

Returns the value of attribute classification_keys.



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# File 'lib/head_music/instrument.rb', line 32

def classification_keys
  @classification_keys
end

#family_key ⇒ Object (readonly)

Returns the value of attribute family_key.



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# File 'lib/head_music/instrument.rb', line 32

def family_key
  @family_key
end

#name_key ⇒ Object (readonly)

Returns the value of attribute name_key.



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# File 'lib/head_music/instrument.rb', line 32

def name_key
  @name_key
end

#orchestra_section_key ⇒ Object (readonly)

Returns the value of attribute orchestra_section_key.



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# File 'lib/head_music/instrument.rb', line 32

def orchestra_section_key
  @orchestra_section_key
end

#variants ⇒ Object (readonly)

Returns the value of attribute variants.



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# File 'lib/head_music/instrument.rb', line 32

def variants
  @variants
end

Class Method Details

.all ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 26

def self.all
  HeadMusic::InstrumentFamily.all
  @all ||=
    INSTRUMENTS.map { |key, _data| get(key) }.sort_by(&:name)
end

.get(name) ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 22

def self.get(name)
  get_by_name(name)
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 38

def ==(other)
  to_s == other.to_s
end

#default_clefs ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 90

def default_clefs
  default_staves&.map(&:clef) || []
end

#default_sounding_transposition ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 94

def default_sounding_transposition
  default_staves&.first&.sounding_transposition || 0
end

#default_staff_scheme ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 82

def default_staff_scheme
  default_variant&.default_staff_scheme
end

#default_staves ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 86

def default_staves
  default_staff_scheme&.staves || []
end

#default_variant ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 78

def default_variant
  variants.find(&:default?) || variants.first
end

#family ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 48

def family
  return unless family_key

  HeadMusic::InstrumentFamily.get(family_key)
end

#multiple_staves? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/head_music/instrument.rb', line 68

def multiple_staves?
  default_staves.length > 1
end

#pitched? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/head_music/instrument.rb', line 72

def pitched?
  return false if default_clefs.compact.uniq == [HeadMusic::Clef.get("neutral_clef")]

  default_clefs.any?
end

#single_staff? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/head_music/instrument.rb', line 64

def single_staff?
  default_staves.length == 1
end

#translation(locale = :en) ⇒ Object 



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# File 'lib/head_music/instrument.rb', line 42

def translation(locale = :en)
  return name unless name_key

  I18n.translate(name_key, scope: %i[head_music instruments], locale: locale, default: name)
end

#transposing? ⇒ Boolean

Returns true if the instrument sounds at a different pitch than written.

Returns:

  • (Boolean) 


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# File 'lib/head_music/instrument.rb', line 55

def transposing?
  default_sounding_transposition != 0
end

#transposing_at_the_octave? ⇒ Boolean

Returns true if the instrument sounds at a different register than written.

Returns:

  • (Boolean) 


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# File 'lib/head_music/instrument.rb', line 60

def transposing_at_the_octave?
  transposing? && default_sounding_transposition % 12 == 0
end