Class: Asciify::Mapping

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

Direct Known Subclasses

HTMLEntities

Instance Method Summary collapse

Constructor Details

#initialize(language = :default, replacement = "?") ⇒ Mapping

define a mapping from Unicode codepoints to ASCII chars language can be a path to a yaml file which contains the mappings as a Hash

If language is a symbol, it refers to a builtin mapping



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# File 'lib/asciify.rb', line 26

def initialize(language = :default, replacement = "?")
  
  if Symbol === language
    path = "#{File.dirname(__FILE__)}/mappings/#{language}.yaml"
  else
    path = language
  end
  
  h = YAML.load_file(path)
  i = Iconv.new("UCS-4","UTF-8")
  
  # use the default replacement if the hash 
  @map = Hash.new( i.iconv(replacement).unpack(PackFormat) )
    
  # the mappings file is UTF-8, recode to UCS-4
  h.each { |k,v|
    @map[*i.iconv(k).unpack(PackFormat)] = i.iconv(v).unpack(PackFormat)
  }
  
  @map
end

Instance Method Details

#[](codepoint) ⇒ Object 



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# File 'lib/asciify.rb', line 48

def [](codepoint)
  @map[codepoint]
end

#from_utf8(str) ⇒ Object

converts an UTF-8 string to an array of unicode codepoints



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# File 'lib/asciify.rb', line 16

def from_utf8(str)
  Iconv.new(Intermediate,"UTF-8").iconv(str).unpack(PackFormat)
end