Contents

require 'redcarpet'
require 'cgi'

require 'magic_reveal/version'

module MagicReveal
  # Custom renderer so the HTML is the right format for Reveal.js.
  class SlideRenderer < Redcarpet::Render::HTML
    include Redcarpet::Render::SmartyPants
    attr_accessor :has_shown_slides

    def initialize
      super(no_styles: true)
    end

    def self.markdown_renderer
      Redcarpet::Markdown.new(
        new,
        space_after_headers: true,
        filter_html: true,
        fenced_code_blocks: true,
        no_intra_emphasis: true
      )
    end

    def doc_header
      @has_shown_slides = false
      "<!-- generated by magic_reveal v#{VERSION} on #{Time.now} -->"
    end

    def doc_footer
      has_shown_slides ? '</section>' : ''
    end

    def header(text, header_level, anchor = nil)
      [].tap do |output|
        output << '</section>' if has_shown_slides
        @has_shown_slides = true
        anchor_html = anchor ? " id=\"#{anchor}\"" : ''

        output << '<section>'
        output << "<h#{header_level}#{anchor_html}>#{text}</h#{header_level}>"
      end.join("\n")
    end

    def prepare_code(code)
      if code =~ /\A\s*@@source\s*=\s*(?<filename>.*)\s*\Z/
        File.read Regexp.last_match[:filename]
      else
        code.sub(/\A\s*/, '').sub(/\s*\Z/, '')
      end
    end

    def block_code(code, language)
      [].tap do |output|
        output << (language ? "<pre class=\"#{language}\">"  : '<pre>')
        output << '<code>'

        output << CGI.escapeHTML(prepare_code code)
        output << '</code>'
        output << '</pre>'
      end.join('')
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
magic_reveal-2.6.1.4	lib/magic_reveal/slide_renderer.rb