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# frozen_string_literal: false ## # An i18n supported text. # # This object provides the following two features: # # * Extracts translation messages from wrapped raw text. # * Translates wrapped raw text in specified locale. # # Wrapped raw text is one of String, RDoc::Comment or Array of them. class RDoc::I18n::Text ## # Creates a new i18n supported text for +raw+ text. def initialize(raw) @raw = raw end ## # Extracts translation target messages and yields each message. # # Each yielded message is a Hash. It consists of the followings: # # :type :: :paragraph # :paragraph :: String (The translation target message itself.) # :line_no :: Integer (The line number of the :paragraph is started.) # # The above content may be added in the future. def extract_messages parse do |part| case part[:type] when :empty_line # ignore when :paragraph yield(part) end end end # Translates raw text into +locale+. def translate(locale) translated_text = '' parse do |part| case part[:type] when :paragraph translated_text << locale.translate(part[:paragraph]) when :empty_line translated_text << part[:line] else raise "should not reach here: unexpected type: #{type}" end end translated_text end private def parse(&block) paragraph = '' paragraph_start_line = 0 line_no = 0 each_line(@raw) do |line| line_no += 1 case line when /\A\s*\z/ if paragraph.empty? emit_empty_line_event(line, line_no, &block) else paragraph << line emit_paragraph_event(paragraph, paragraph_start_line, line_no, &block) paragraph = '' end else paragraph_start_line = line_no if paragraph.empty? paragraph << line end end unless paragraph.empty? emit_paragraph_event(paragraph, paragraph_start_line, line_no, &block) end end def each_line(raw, &block) case raw when RDoc::Comment raw.text.each_line(&block) when Array raw.each do |comment, location| each_line(comment, &block) end else raw.each_line(&block) end end def emit_empty_line_event(line, line_no) part = { :type => :empty_line, :line => line, :line_no => line_no, } yield(part) end def emit_paragraph_event(paragraph, paragraph_start_line, line_no, &block) paragraph_part = { :type => :paragraph, :line_no => paragraph_start_line, } match_data = /(\s*)\z/.match(paragraph) if match_data paragraph_part[:paragraph] = match_data.pre_match yield(paragraph_part) emit_empty_line_event(match_data[1], line_no, &block) else paragraph_part[:paragraph] = paragraph yield(paragraph_part) end end end