- Add pandoc as an alternative rendering engine

Author: DannyBen

lib/madness/markdown_document.rb

@@ -24,7 +24,8 @@ def text
     end
 
     def to_html
-      @to_html ||= Redcarpet::Markdown.new(redcarpet_renderer, redcarpet_options).render text
+      # @to_html ||= Redcarpet::Markdown.new(redcarpet_renderer, redcarpet_options).render text
+      @to_html ||= Rendering::Handler.new(:pandoc).render text
     end
 
   private
@@ -50,36 +51,36 @@ def has_h1?(input)
       lines[0].match(/^# \w+/) || (lines[1] && lines[0].match(/^\w+/) && lines[1].start_with?('='))
     end
 
-    def redcarpet_options
-      @redcarpet_options ||= {
-        no_intra_emphasis:   true,
-        autolink:            true,
-        tables:              true,
-        fenced_code_blocks:  true,
-        strikethrough:       true,
-        space_after_headers: true,
-        superscript:         true,
-        underline:           true,
-        highlight:           true,
-        quote:               false,
-        footnotes:           true,
-      }
-    end
-
-    def redcarpet_renderer
-      redcarpet_handler.new with_toc_data: true
-    end
-
-    def redcarpet_handler
-      config.highlighter ? HighlightRenderer : Redcarpet::Render::HTML
-    end
+    # def redcarpet_options
+    #   @redcarpet_options ||= {
+    #     no_intra_emphasis:   true,
+    #     autolink:            true,
+    #     tables:              true,
+    #     fenced_code_blocks:  true,
+    #     strikethrough:       true,
+    #     space_after_headers: true,
+    #     superscript:         true,
+    #     underline:           true,
+    #     highlight:           true,
+    #     quote:               false,
+    #     footnotes:           true,
+    #   }
+    # end
+
+    # def redcarpet_renderer
+    #   redcarpet_handler.new with_toc_data: true
+    # end
+
+    # def redcarpet_handler
+    #   config.highlighter ? HighlightRenderer : Redcarpet::Render::HTML
+    # end
 
     def toc
       @toc ||= toc_handler.markdown
     end
 
     def toc_handler
-      @toc_handler ||= Madness::InlineTableOfContents.new markdown
+      @toc_handler ||= InlineTableOfContents.new markdown
     end
   end
 end

lib/madness/rendering/handler.rb

@@ -0,0 +1,23 @@
+require_relative 'pandoc'
+require_relative 'redcarpet'
+
+module Madness
+  module Rendering
+    class Handler
+      HANDLERS = {
+        redcarpet: Redcarpet,
+        pandoc: Pandoc,
+      }
+
+      attr_reader :selector
+
+      def initialize(selector) = @selector = selector
+      def render(text) = handler.render(text)
+
+    private
+
+      def handler = @handler ||= handler_class.new
+      def handler_class = @handler_class ||= HANDLERS[selector]
+    end
+  end
+end

lib/madness/rendering/pandoc.rb

@@ -0,0 +1,11 @@
+require 'pandoc-ruby'
+
+module Madness
+  module Rendering
+    class Pandoc
+      def render(text)
+        PandocRuby.new(text, from: :markdown, to: :html).convert
+      end
+    end
+  end
+end

lib/madness/rendering/redcarpet.rb

@@ -0,0 +1,44 @@
+require 'redcarpet'
+
+module Madness
+  module Rendering
+    class Redcarpet
+      include ServerHelper
+
+      def render(text)
+        handler.render text
+      end
+
+    private
+
+      def handler
+        @handler ||= ::Redcarpet::Markdown.new renderer, options
+      end
+
+      def options
+        @redcarpet_options ||= {
+          no_intra_emphasis:   true,
+          autolink:            true,
+          tables:              true,
+          fenced_code_blocks:  true,
+          strikethrough:       true,
+          space_after_headers: true,
+          superscript:         true,
+          underline:           true,
+          highlight:           true,
+          quote:               false,
+          footnotes:           true,
+        }
+      end
+
+      def renderer
+        handler_class.new with_toc_data: true
+      end
+
+      def handler_class
+        config.highlighter ? HighlightRenderer : ::Redcarpet::Render::HTML
+      end
+
+    end
+  end
+end

lib/madness/highlight_renderer.rb …dness/rendering/redcarpet_highlighter.rblib/madness/highlight_renderer.rb renamed to lib/madness/rendering/redcarpet_highlighter.rb lib/madness/highlight_renderer.rb renamed to lib/madness/rendering/redcarpet_highlighter.rb

@@ -24,6 +24,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'puma', '>= 5.1', '< 7'
   s.add_dependency 'rackup', '~> 2.1'
   s.add_dependency 'redcarpet', '~> 3.5'
+  s.add_dependency 'pandoc-ruby', '~> 2.1'
   s.add_dependency 'requires', '~> 1.0'
   s.add_dependency 'rouge', '~> 4.0'
   s.add_dependency 'sinatra', '>= 3.0', '< 5'