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|
# encoding: utf-8
module RailsI18n
module Transliteration
module Ukrainian
class << self
def rule
lambda do |string|
next '' unless string
string.gsub(/./) do |char|
# Regexp.last_match is local to the thread and method scope
# of the method that did the pattern match.
@pre_match, @post_match = $`, $'
case char
when 'Ж'
lookahead_upcase 'ZH'
when 'Х'
lookahead_upcase 'KH'
when 'Ц'
lookahead_upcase 'TS'
when 'Ч'
lookahead_upcase 'CH'
when 'Ш'
lookahead_upcase 'SH'
when 'Щ'
lookahead_upcase 'SHCH'
when 'г'
behind =~ /[зЗ]/ ? 'gh' : 'h'
when 'Г'
behind =~ /[зЗ]/ ? lookahead_upcase('GH') : 'H'
when 'є'
letter?(behind) ? 'ie' : 'ye'
when 'Є'
letter?(behind) ? lookahead_upcase('IE') : lookahead_upcase('YE')
when 'ї'
letter?(behind) ? 'i' : 'yi'
when 'Ї'
letter?(behind) ? 'I' : lookahead_upcase('YI')
when 'й'
letter?(behind) ? 'i' : 'y'
when 'Й'
letter?(behind) ? 'I' : 'Y'
when 'ю'
letter?(behind) ? 'iu' : 'yu'
when 'Ю'
letter?(behind) ? lookahead_upcase('IU') : lookahead_upcase('YU')
when 'я'
letter?(behind) ? 'ia' : 'ya'
when 'Я'
letter?(behind) ? lookahead_upcase('IA') : lookahead_upcase('YA')
when "'"
# remove apostrophe inside a word
letter?(behind) && letter?(ahead) ? '' : "'"
else
straight_lookup[char] || char
end
end
end
end
private
def behind
@pre_match && @pre_match[-1]
end
def ahead
@post_match && @post_match[0]
end
def downcased?(symbol)
symbol =~ downcased_regexp
end
def downcased_regexp
@downcased_regexp ||= /[а-яґєії]/
end
# apostrophe can be inside a word
def letter?(symbol)
symbol =~ letter_regexp
end
def letter_regexp
@letter_regexp ||= /[а-яґєіїА-ЯҐЄІЇ'’]/
end
def lookahead_upcase(word)
downcased?(ahead) ? word.capitalize : word.upcase
end
def straight_lookup
@straight_lookup ||= {
'а'=>'a','б'=>'b','в'=>'v','ґ'=>'g','д'=>'d','е'=>'e','ж'=>'zh',
'з'=>'z','и'=>'y','і'=>'i','к'=>'k','л'=>'l','м'=>'m','н'=>'n','о'=>'o',
'п'=>'p','р'=>'r','с'=>'s','т'=>'t','у'=>'u','ф'=>'f','х'=>'kh','ц'=>'ts',
'ч'=>'ch','ш'=>'sh','щ'=>'shch','ь'=>'','’'=>'',
'А'=>'A','Б'=>'B','В'=>'V','Ґ'=>'G','Д'=>'D','Е'=>'E',
'З'=>'Z','И'=>'Y','І'=>'I','К'=>'K','Л'=>'L','М'=>'M','Н'=>'N','О'=>'O',
'П'=>'P','Р'=>'R','С'=>'S','Т'=>'T','У'=>'U','Ф'=>'F','Ь'=>''
}
end
end
end
end
end
{ :uk => {
:i18n => {
:transliterate => {
:rule => RailsI18n::Transliteration::Ukrainian.rule }}}}
|
