Agate

Format ruby characters (currently only furigana) in text for display. Requires Ruby 1.9 or later (or compatible engine).

• Plain text (echoes back passed text)
• HTML5 (ruby element)
• Strip ruby text

Install the gem with

gem install agate

or add it to your Gemfile:

gem "agate", "~> 0.6.0"

To markup a simple string with delimited furigana:

require "rubygems"
require "agate"

options = {
  # can be any single character or pair of characters which surround ruby characters in text to parse
  :delimiters => "【】" # default delimiters
  # markup formatter to use (options: :plain (default), :html, :strip)
  :formatter => :html
}

a = Agate::Parser.new(options) # call without arguments to use defaults
a.parse("勉【べん】強【きょう】します")

results in

<ruby>勉<rp>【</rp><rt>べん</rt><rp>】</rp></ruby><ruby>強<rp>【</rp><rt>きょう</rt><rp>】</rp></ruby>します

which (in your browser) looks like

勉【べん】強【きょう】します

It's highly recommended to read the W3C's documentation on the HTML5 ruby element to understand the usage of this element. There is a CSS workaround available that enables the display of ruby characters in all modern browsers, but it's up to you to test all cases where you intend to use the ruby element.