truncate by locale

gistfile1.rb

module TruncationHelper
  # Not all character sizes are equal, 120 characters of English text
  # could take up a lot more screen space than 120 characters of
  # Chinese text.
  def locale_aware_truncate(text, options)
    length = case I18n.locale
             when :ja, :zh
               options[:length][I18n.locale] || options[:length][:en] / 2
             else
               options[:length][:en]
             end

    truncate(text, length: length)
  end
end