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authorJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-16 18:49:26 +0900
committerJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-30 00:39:06 +0900
commitfcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch)
tree64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/lib/rdoc/i18n/text.rb
Fresh start
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+##
+# 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