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Class: ActiveSupport::Multibyte::Unicode::UnicodeDatabase

Relationships & Source Files
Inherits: Object
Defined in: activesupport/lib/active_support/multibyte/unicode.rb

Overview

Holds static data from the ::ActiveSupport::Multibyte::Unicode database.

Constant Summary

Class Method Summary

Instance Method Summary

Constructor Details

.new ⇒ UnicodeDatabase

[ GitHub ] 

  


# File 'activesupport/lib/active_support/multibyte/unicode.rb', line 318



def initialize
  @codepoints = Hash.new(Codepoint.new)
  @composition_exclusion = []
  @composition_map = {}
  @boundary = {}
  @cp1252 = {}
end


  







Class Method Details



  

    .dirname  
  



  

    

Returns the directory in which the data files are stored.


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/multibyte/unicode.rb', line 361



def self.dirname
  File.expand_path("../values", __dir__)
end


  








  

    .filename  
  



  

    

Returns the filename for the data file for this version.


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/multibyte/unicode.rb', line 366



def self.filename
  File.expand_path File.join(dirname, "unicode_tables.dat")
end


  







Instance Method Details



  

    #load  
  



  

    

Loads the ::ActiveSupport::Multibyte::Unicode database and returns all the internal objects of UnicodeDatabase.


  



  [ GitHub ]


  

  


# File 'activesupport/lib/active_support/multibyte/unicode.rb', line 338



def load
  begin
    @codepoints, @composition_exclusion, @composition_map, @boundary, @cp1252 = File.open(self.class.filename, "rb") { |f| Marshal.load f.read }
  rescue => e
    raise IOError.new("Couldn't load the Unicode tables for UTF8Handler (#{e.message}), ActiveSupport::Multibyte is unusable")
  end

  # Redefine the === method so we can write shorter rules for grapheme cluster breaks
  @boundary.each_key do |k|
    @boundary[k].instance_eval do
      def ===(other)
        detect { |i| i === other } ? true : false
      end
    end if @boundary[k].kind_of?(Array)
  end

  # define attr_reader methods for the instance variables
  class << self
    attr_reader(*ATTRIBUTES)
  end
end