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2.2.0
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# coding: utf-8 # Copyright Ayumu Nojima (野島 歩) and Martin J. Dürst (duerst@it.aoyama.ac.jp) # additions to class String for Unicode normalization class String # === Unicode Normalization # # :call-seq: # str.unicode_normalize(form=:nfc) # # Returns a normalized form of +str+, using Unicode normalizations # NFC, NFD, NFKC, or NFKD. The normalization form used is determined # by +form+, which is any of the four values :nfc, :nfd, :nfkc, or :nfkd. # The default is :nfc. # # If the string is not in a Unicode Encoding, then an Exception is raised. # In this context, 'Unicode Encoding' means any of UTF-8, UTF-16BE/LE, # and UTF-32BE/LE, as well as GB18030, UCS_2BE, and UCS_4BE. Anything # else than UTF-8 is implemented by converting to UTF-8, # which makes it slower than UTF-8. # # _Examples_ # # "a\u0300".unicode_normalize #=> 'à' (same as "\u00E0") # "a\u0300".unicode_normalize(:nfc) #=> 'à' (same as "\u00E0") # "\u00E0".unicode_normalize(:nfd) #=> 'à' (same as "a\u0300") # "\xE0".force_encoding('ISO-8859-1').unicode_normalize(:nfd) # #=> Encoding::CompatibilityError raised # def unicode_normalize(form = :nfc) require 'unicode_normalize/normalize.rb' unless defined? UnicodeNormalize ## The following line can be uncommented to avoid repeated checking for ## UnicodeNormalize. However, tests didn't show any noticeable speedup ## when doing this. This comment also applies to the commented out lines ## in String#unicode_normalize! and String#unicode_normalized?. # String.send(:define_method, :unicode_normalize, ->(form = :nfc) { UnicodeNormalize.normalize(self, form) } ) UnicodeNormalize.normalize(self, form) end # :call-seq: # str.unicode_normalize!(form=:nfc) # # Destructive version of String#unicode_normalize, doing Unicode # normalization in place. # def unicode_normalize!(form = :nfc) require 'unicode_normalize/normalize.rb' unless defined? UnicodeNormalize # String.send(:define_method, :unicode_normalize!, ->(form = :nfc) { replace(unicode_normalize(form)) } ) replace(unicode_normalize(form)) end # :call-seq: # str.unicode_normalized?(form=:nfc) # # Checks whether +str+ is in Unicode normalization form +form+, # which is any of the four values :nfc, :nfd, :nfkc, or :nfkd. # The default is :nfc. # # If the string is not in a Unicode Encoding, then an Exception is raised. # For details, see String#unicode_normalize. # # _Examples_ # # "a\u0300".unicode_normalized? #=> false # "a\u0300".unicode_normalized?(:nfd) #=> true # "\u00E0".unicode_normalized? #=> true # "\u00E0".unicode_normalized?(:nfd) #=> false # "\xE0".force_encoding('ISO-8859-1').unicode_normalized? # #=> Encoding::CompatibilityError raised # def unicode_normalized?(form = :nfc) require 'unicode_normalize/normalize.rb' unless defined? UnicodeNormalize # String.send(:define_method, :unicode_normalized?, ->(form = :nfc) { UnicodeNormalize.normalized?(self, form) } ) UnicodeNormalize.normalized?(self, form) end end
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