Class: CharacterSet::Character

Inherits:
Object
  • Object
show all
Defined in:
lib/character_set/character.rb

Constant Summary collapse

ENCODING = 
'utf-8'.freeze
SAFELY_PRINTABLE = 
(0x21..0x7E).to_a - ['-', '[', '\\', ']', '^'].map(&:ord)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(codepoint) ⇒ Character

Returns a new instance of Character.



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# File 'lib/character_set/character.rb', line 8

def initialize(codepoint)
  case codepoint
  when Integer then self.codepoint = codepoint
  when String  then self.codepoint = codepoint.ord
  else              raise ArgumentError, 'pass an Integer or String'
  end
end

Instance Attribute Details

#codepoint ⇒ Object

Returns the value of attribute codepoint.



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# File 'lib/character_set/character.rb', line 6

def codepoint
  @codepoint
end

Instance Method Details

#escape(opts = {}) ⇒ Object 



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# File 'lib/character_set/character.rb', line 24

def escape(opts = {})
  return to_s if SAFELY_PRINTABLE.include?(codepoint) && !opts[:escape_all]

  return yield(self) if block_given?

  # https://billposer.org/Software/ListOfRepresentations.html
  case opts[:format].to_s.downcase.delete('-_ ')
  when '', 'default', 'es6', 'esnext', 'rb', 'ruby'
    default_escape(opts)
  when 'java', 'javascript', 'js'
    default_escape(opts, false)
  when 'capitalizableu', 'c#', 'csharp', 'd', 'python'
    capitalizable_u_escape
  when 'u+', 'uplus'
    u_plus_escape
  when 'literal', 'raw'
    to_s
  else
    raise ArgumentError, "unsupported format: #{opts[:format].inspect}"
  end
end

#hex ⇒ Object 



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# File 'lib/character_set/character.rb', line 20

def hex
  codepoint.to_s(16).upcase
end

#plane ⇒ Object 



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# File 'lib/character_set/character.rb', line 46

def plane
  codepoint / 0x10000
end

#to_s ⇒ Object 



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# File 'lib/character_set/character.rb', line 16

def to_s
  codepoint.chr(ENCODING)
end