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# encoding: utf-8
require 'i18n/gettext'
require 'i18n/gettext/po_parser'
# Experimental support for using Gettext po files to store translations.
#
# To use this you can simply include the module to the Simple backend - or
# whatever other backend you are using.
#
# I18n::Backend::Simple.send(:include, I18n::Backend::Gettext)
#
# Now you should be able to include your Gettext translation (*.po) files to
# the I18n.load_path so they're loaded to the backend and you can use them as
# usual:
#
# I18n.load_path += Dir["path/to/locales/*.po"]
#
# Following the Gettext convention this implementation expects that your
# translation files are named by their locales. E.g. the file en.po would
# contain the translations for the English locale.
module I18n
module Backend
module Gettext
class PoData < Hash
def set_comment(msgid_or_sym, comment)
# ignore
end
end
protected
def load_po(filename)
locale = ::File.basename(filename, '.po').to_sym
data = normalize(locale, parse(filename))
{ locale => data }
end
def parse(filename)
GetText::PoParser.new.parse(::File.read(filename), PoData.new)
end
def normalize(locale, data)
data.inject({}) do |result, (key, value)|
unless key.nil? || key.empty?
key, value = normalize_pluralization(locale, key, value) if key.index("\000")
parts = key.split('|').reverse
normalized = parts.inject({}) do |normalized, part|
normalized = { part => normalized.empty? ? value : normalized }
end
# deep_merge by Stefan Rusterholz, see http://www.ruby-forum.com/topic/142809
merger = proc { |key, v1, v2| Hash === v1 && Hash === v2 ? v1.merge(v2, &merger) : v2 }
result.merge!(normalized, &merger)
end
result
end
end
def normalize_pluralization(locale, key, value)
# FIXME po_parser includes \000 chars that can not be turned into Symbols
key = key.gsub("\000", I18n::Gettext::PLURAL_SEPARATOR).split(I18n::Gettext::PLURAL_SEPARATOR).first
keys = I18n::Gettext.plural_keys(locale)
values = value.split("\000")
raise "invalid number of plurals: #{values.size}, keys: #{keys.inspect}" if values.size != keys.size
result = {}
values.each_with_index { |value, ix| result[keys[ix]] = value }
[key, result]
end
end
end
end
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