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

Inherits:
Object
  • Object
show all
Defined in:
activesupport/lib/active_support/multibyte/unicode.rb

Overview

Holds static data from the Unicode database

Constant Summary collapse

ATTRIBUTES =
:codepoints, :composition_exclusion, :composition_map, :boundary, :cp1252

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initializeUnicodeDatabase

Returns a new instance of UnicodeDatabase.



323
324
325
326
327
328
329
# File 'activesupport/lib/active_support/multibyte/unicode.rb', line 323

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

Class Method Details

.dirnameObject

Returns the directory in which the data files are stored



365
366
367
# File 'activesupport/lib/active_support/multibyte/unicode.rb', line 365

def self.dirname
  File.dirname(__FILE__) + '/../values/'
end

.filenameObject

Returns the filename for the data file for this version



370
371
372
# File 'activesupport/lib/active_support/multibyte/unicode.rb', line 370

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

Instance Method Details

#loadObject

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



342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
# File 'activesupport/lib/active_support/multibyte/unicode.rb', line 342

def load
  begin
    @codepoints, @composition_exclusion, @composition_map, @boundary, @cp1252 = File.open(self.class.filename, 'rb') { |f| Marshal.load f.read }
  rescue Exception => 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 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