86 lines
2.8 KiB
Ruby
86 lines
2.8 KiB
Ruby
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# frozen_string_literal: true
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require 'i18n/gettext'
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require 'i18n/gettext/po_parser'
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module I18n
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module Backend
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# Experimental support for using Gettext po files to store translations.
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#
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# To use this you can simply include the module to the Simple backend - or
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# whatever other backend you are using.
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#
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# I18n::Backend::Simple.include(I18n::Backend::Gettext)
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#
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# Now you should be able to include your Gettext translation (*.po) files to
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# the +I18n.load_path+ so they're loaded to the backend and you can use them as
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# usual:
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#
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# I18n.load_path += Dir["path/to/locales/*.po"]
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#
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# Following the Gettext convention this implementation expects that your
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# translation files are named by their locales. E.g. the file en.po would
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# contain the translations for the English locale.
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#
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# To translate text <b>you must use</b> one of the translate methods provided by
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# I18n::Gettext::Helpers.
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#
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# include I18n::Gettext::Helpers
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# puts _("some string")
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#
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# Without it strings containing periods (".") will not be translated.
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module Gettext
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using I18n::HashRefinements
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class PoData < Hash
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def set_comment(msgid_or_sym, comment)
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# ignore
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end
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end
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protected
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def load_po(filename)
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locale = ::File.basename(filename, '.po').to_sym
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data = normalize(locale, parse(filename))
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{ locale => data }
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end
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def parse(filename)
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GetText::PoParser.new.parse(::File.read(filename), PoData.new)
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end
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def normalize(locale, data)
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data.inject({}) do |result, (key, value)|
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unless key.nil? || key.empty?
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key = key.gsub(I18n::Gettext::CONTEXT_SEPARATOR, '|')
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key, value = normalize_pluralization(locale, key, value) if key.index("\000")
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parts = key.split('|').reverse
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normalized = parts.inject({}) do |_normalized, part|
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{ part => _normalized.empty? ? value : _normalized }
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end
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result.deep_merge!(normalized)
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end
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result
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end
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end
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def normalize_pluralization(locale, key, value)
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# FIXME po_parser includes \000 chars that can not be turned into Symbols
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key = key.gsub("\000", I18n::Gettext::PLURAL_SEPARATOR).split(I18n::Gettext::PLURAL_SEPARATOR).first
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keys = I18n::Gettext.plural_keys(locale)
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values = value.split("\000")
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raise "invalid number of plurals: #{values.size}, keys: #{keys.inspect} on #{locale} locale for msgid #{key.inspect} with values #{values.inspect}" if values.size != keys.size
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result = {}
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values.each_with_index { |_value, ix| result[keys[ix]] = _value }
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[key, result]
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end
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end
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end
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end
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