denden.rb

# -*- coding:utf-8 -*-
require 'bundler/setup'
Bundler.require
require 'redcarpet'

class DenDen < Redcarpet::Render::HTML
  def normal_text text
    text.gsub(/\^([^\^]+?)\^/) do |_|
      "<span class='tcy'>#{$1}</span>"
    end.gsub(%r!{([^|]+)\|(.+)}!) do |_|
      "<ruby>#{$1}<rt>#{$2}</rt></ruby>"
    end
  end
end

markdown = Redcarpet::Markdown.new(DenDen, no_intra_emphasis: true,fenced_code_blocks: true,autolink: true,tables: true, with_toc_data: true)

# markdown.render('昭和^53^年')
#   => <p>昭和<span class='tcy'>53</span>年</p>
# markdown.render('{電子出版|でんししゅっぱん}')
#   => <p><ruby>電子出版<rt>でんししゅっぱん</rt></ruby></p>