Convert Ruby scripts to HTML and Markdown

first i have to say that my scripts will be a little longer
than ever, to be more verbose and less encrypted, so images
associated with my posts will be cropped and linked to
full post on Github, post will contain an HTML version
and code file.
this script will read ruby code and parse it and split it to
set of blocks (code blocks, comments blocks) and then output
HTML format or Markdown Format, make sure your comments are written
in Markdown format.
i combine this script with an older one that convert HTML page to PNG image
and then i use Cairo library to crop it and write the post title,
you can use it to generate beautiful code documentation with a bit of
enhancement (index page and links back in each page maybe).

Gist : https://gist.github.com/11113733

#!/usr/bin/env ruby
# Author : Emad Elsaid (https://github.com/blazeeboy)
require 'pygmentize' # gem install pygmentize
require 'redcarpet' # gem install redcarpet

# consecutive lines of code
# should be highlighted using pygmentize
# and converter to markdown block simply
# using the markdown syntax for code
# used by github flavored markdown
class CodeBlock < Array

  def to_html
    Pygmentize.process join, :ruby
  end

  def to_md
    "```ruby\n#{join}\n```"
  end
  alias_method :to_markdown, :to_md
end

# set of consecutive lines of comments
class CommentBlock < Array

  # will use this Redcarpet renderer to convert 
  # markdown to html
  @@renderer = Redcarpet::Markdown.new(Redcarpet::Render::HTML, 
                            fenced_code_blocks: true,
                            disable_indented_code_blocks: true,
                            strikethrough: true,
                            superscript: true,
                            underline: true,
                            autolink: true )

  # use the renderer on the content
  def to_html
    @@renderer.render join("\n")
  end

  # convert the block to markdown format
  # and also give it a full name alias
  def to_md
    join("\n")
  end
  alias_method :to_markdown, :to_md

end 

# container class will have multiple blocks of 
# comments and code
class CodeConverter < Array

  # you should pass code when
  # initializing new instance
  # in order to parse it
  def initialize( code )
    parse code
  end

  # add new line of code to the class
  # it start new code block if the last block is
  # not code block then adds the line of code
  # to the last block
  def add_code( line )
    self << CodeBlock.new unless last.is_a? CodeBlock
    last << line
  end

  # add new comment line to the class
  # it adds new comment block if the last block is not 
  # comments block then add the comment line to the block
  def add_comment( line )
    self << CommentBlock.new unless last.is_a? CommentBlock
    last << line
  end

  # parse code and put result to this class
  # first insert a comment block then
  # parse each line and add it according 
  # to the line type
  def parse(code)
    replace [CommentBlock.new]

    code.lines.each do |line|
      case
        when line.strip.start_with?('# ')
          add_comment line.strip[2..-1]

        when line.strip.start_with?('#!')
          add_code line

        when line.strip.start_with?('#')
          add_comment line.strip[1..-1]

        else
          add_code line
      end
    end

  end

  # convert each block to html
  # and wrap it in a styled page
  # if a file path passed it'll write output to it
  # in all cases it'll return the output
  def to_html(file = nil)
    code = map.with_index do |block, i| 
          # each cell in resulted table 
          # will have a class same as the 
          # class name of teh block downcased
          klass = block.class.to_s.downcase
          # start table row or end it
          # according to the current block index
          prefix = i.even? ? '<tr>' : ''
          suffix = i.odd? ? '</tr>' : ''
          # produced block html
          "#{prefix}<td class=\"section #{klass}\">#{block.to_html}</td>#{suffix}" 
        end

    # add a closing cell if the code 
    # ends with comments lines
    code << "<td></td></tr>" if last.is_a? CommentBlock

    # here is the full page with embeded style
    # i had to add the css here to make sure script stay as 
    # one file not multiple dependent files.
    html = <<-EOT
<html>
<head>
<style>
body { background: #29281e; padding:0px; margin:0px; font-family: verdana, tahoma; font-size: 13px; }
.content{ border-collapse: collapse; }
.section{ padding: 5px; border-top: 1px solid #333; } 
.commentblock{ width: 40%;text-align: right; vertical-align: top; font-size: 13px; color: #ddd; text-shadow: 1px 1px 0px black; }
.codeblock{ width: 60%; background: #29281e; border-left: 1px solid #333; padding-left: 10px; }
.commentblock a{ color: #fff; }
.codeblock pre{ white-space: pre-wrap; margin: 0px; }
.highlight { padding: 0px; font-size: 13px; }
div.highlight, div.highlight code, div.highlight pre  { padding: 0px; }div.highlight code { padding: 0; }div.highlight .c { color: #75715e }div.highlight .err { color: #960050; background-color: #1e0010 }div.highlight .k { color: #66d9ef }div.highlight .l { color: #ae81ff }div.highlight .n { color: #f8f8f2 }div.highlight .o { color: #f92672 }div.highlight .p { color: #f8f8f2 }div.highlight .cm { color: #75715e }div.highlight .cp { color: #75715e }div.highlight .c1 { color: #75715e }div.highlight .cs { color: #75715e }div.highlight .ge { font-style: italic }div.highlight .gs { font-weight: bold }div.highlight .kc { color: #66d9ef }div.highlight .kd { color: #66d9ef }div.highlight .kn { color: #f92672 }div.highlight .kp { color: #66d9ef }div.highlight .kr { color: #66d9ef }div.highlight .kt { color: #66d9ef }div.highlight .ld { color: #e6db74 }div.highlight .m { color: #ae81ff }div.highlight .s { color: #e6db74 }div.highlight .na { color: #a6e22e }div.highlight .nb { color: #f8f8f2 }div.highlight .nc { color: #a6e22e }div.highlight .no { color: #66d9ef }div.highlight .nd { color: #a6e22e }div.highlight .ni { color: #f8f8f2 }div.highlight .ne { color: #a6e22e }div.highlight .nf { color: #a6e22e }div.highlight .nl { color: #f8f8f2 }div.highlight .nn { color: #f8f8f2 }div.highlight .nx { color: #a6e22e }div.highlight .py { color: #f8f8f2 }div.highlight .nt { color: #f92672 }div.highlight .nv { color: #f8f8f2 }div.highlight .ow { color: #f92672 }div.highlight .w { color: #f8f8f2 }div.highlight .mf { color: #ae81ff }div.highlight .mh { color: #ae81ff }div.highlight .mi { color: #ae81ff }div.highlight .mo { color: #ae81ff }div.highlight .sb { color: #e6db74 }div.highlight .sc { color: #e6db74 }div.highlight .sd { color: #e6db74 }div.highlight .s2 { color: #e6db74 }div.highlight .se { color: #ae81ff }div.highlight .sh { color: #e6db74 }div.highlight .si { color: #e6db74 }div.highlight .sx { color: #e6db74 }div.highlight .sr { color: #e6db74 }div.highlight .s1 { color: #e6db74 }div.highlight .ss { color: #e6db74 }div.highlight .bp { color: #f8f8f2 }div.highlight .vc { color: #f8f8f2 }div.highlight .vg { color: #f8f8f2 }div.highlight .vi { color: #f8f8f2 }div.highlight .il { color: #ae81ff }
</style>
</head>
<body>
<table class="content">#{code.join}</table>
</body>
</html>
EOT

    # write output to file if a path is passed
    # and return html
    File.write file, html unless file.nil?
    html
  end

  # Convert the analyzed code into Markdown
  # this is easier than HTML as you'll need
  # to convert each block to markdown and
  # join them with new line
  # write output to file if a path is passed
  def to_md(file=nil)

    md = map {|b| b.to_md }.join "\n"

    File.write file, md unless file.nil?
    md
  end
  alias_method :to_markdown, :to_md

end

# ## How to use ?
# create new Code Converter class with code
blocks = CodeConverter.new( File.read('/path/to/code/file.rb') )
# and convert to html and markdown and save it to this file path
blocks.to_html '/path/to/html/code.html'
blocks.to_md '/path/to/md/markdown.md'