JezK
Edit File: multibyte.rb
# encoding: utf-8 # frozen_string_literal: true require 'mail/multibyte/chars' module Mail #:nodoc: module Multibyte # Raised when a problem with the encoding was found. class EncodingError < StandardError; end class << self # The proxy class returned when calling mb_chars. You can use this accessor to configure your own proxy # class so you can support other encodings. See the Mail::Multibyte::Chars implementation for # an example how to do this. # # Example: # Mail::Multibyte.proxy_class = CharsForUTF32 attr_accessor :proxy_class end self.proxy_class = Mail::Multibyte::Chars if RUBY_VERSION >= "1.9" # == Multibyte proxy # # +mb_chars+ is a multibyte safe proxy for string methods. # # In Ruby 1.8 and older it creates and returns an instance of the Mail::Multibyte::Chars class which # encapsulates the original string. A Unicode safe version of all the String methods are defined on this proxy # class. If the proxy class doesn't respond to a certain method, it's forwarded to the encapsuled string. # # name = 'Claus Müller' # name.reverse # => "rell??M sualC" # name.length # => 13 # # name.mb_chars.reverse.to_s # => "rellüM sualC" # name.mb_chars.length # => 12 # # In Ruby 1.9 and newer +mb_chars+ returns +self+ because String is (mostly) encoding aware. This means that # it becomes easy to run one version of your code on multiple Ruby versions. # # == Method chaining # # All the methods on the Chars proxy which normally return a string will return a Chars object. This allows # method chaining on the result of any of these methods. # # name.mb_chars.reverse.length # => 12 # # == Interoperability and configuration # # The Chars object tries to be as interchangeable with String objects as possible: sorting and comparing between # String and Char work like expected. The bang! methods change the internal string representation in the Chars # object. Interoperability problems can be resolved easily with a +to_s+ call. # # For more information about the methods defined on the Chars proxy see Mail::Multibyte::Chars. For # information about how to change the default Multibyte behaviour see Mail::Multibyte. def self.mb_chars(str) if proxy_class.consumes?(str) proxy_class.new(str) else str end end else def self.mb_chars(str) if proxy_class.wants?(str) proxy_class.new(str) else str end end end # Regular expressions that describe valid byte sequences for a character VALID_CHARACTER = { # Borrowed from the Kconv library by Shinji KONO - (also as seen on the W3C site) 'UTF-8' => /\A(?: [\x00-\x7f] | [\xc2-\xdf] [\x80-\xbf] | \xe0 [\xa0-\xbf] [\x80-\xbf] | [\xe1-\xef] [\x80-\xbf] [\x80-\xbf] | \xf0 [\x90-\xbf] [\x80-\xbf] [\x80-\xbf] | [\xf1-\xf3] [\x80-\xbf] [\x80-\xbf] [\x80-\xbf] | \xf4 [\x80-\x8f] [\x80-\xbf] [\x80-\xbf])\z /xn, # Quick check for valid Shift-JIS characters, disregards the odd-even pairing 'Shift_JIS' => /\A(?: [\x00-\x7e\xa1-\xdf] | [\x81-\x9f\xe0-\xef] [\x40-\x7e\x80-\x9e\x9f-\xfc])\z /xn } end end require 'mail/multibyte/utils'