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

#initialize ⇒ UnicodeDatabase

Returns a new instance of UnicodeDatabase.



318
319
320
321
322
323
324
 
# File '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 ⇒ Object

Returns the directory in which the data files are stored.



361
362
363
 
# File 'lib/active_support/multibyte/unicode.rb', line 361

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

.filename ⇒ Object

Returns the filename for the data file for this version.



366
367
368
 
# File '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 ⇒ Object

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



338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
 
# File '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