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

Inherits:
Object
  • Object
show all
Defined in:
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.



337
338
339
340
341
342
343
# File 'lib/active_support/multibyte/unicode.rb', line 337

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.



380
381
382
# File 'lib/active_support/multibyte/unicode.rb', line 380

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

.filenameObject

Returns the filename for the data file for this version.



385
386
387
# File 'lib/active_support/multibyte/unicode.rb', line 385

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.



357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
# File 'lib/active_support/multibyte/unicode.rb', line 357

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