make a html file with syntax highlighting

Hilite.rb

#!/usr/bin/env ruby
require "rubygems"
require "uv"

class Hilite
  BGCOLORS = {"all_hallows_eve" => {:bg => '#000000', :fg => '#ffffff'},
    "amy" => {:bg => '#200420', :fg => '#d1d0ff'},
    "blackboard" => {:bg => '#0d1021', :fg => '#f8f8f8'},
    "brilliance_black" => {:bg => '#0d0d0d', :fg => '#cccccc'},
    "brilliance_dull" => {:bg => '#0a0a0a', :fg => '#cdcdcd'},
    "cobalt" => {:bg => '#002444', :fg => '#e6e1dc'},
    "dawn" => {:bg => '#f9f9f9', :fg => '#080808'},
    "espresso_libre" => {:bg => '#2a211c', :fg => '#bcae9d'},
    "idle" => {:bg => '#ffffff', :fg => '#000000'},
    "iplastic" => {:bg => '#efefef', :fg => '#000000'},
    "lazy" => {:bg => '#ffffff', :fg => '#000000'},
    "mac_classic" => {:bg => '#ffffff', :fg => '#000000'},
    "magicwb_amiga" => {:bg => '#969696', :fg => '#000000'},
    "pastels_on_dark" => {:bg => '#211e1e', :fg => '#dadada'},
    "slush_poppies" => {:bg => '#f1f1f1', :fg => '#000000'},
    "spacecadet" => {:bg => '#0d0d0d', :fg => '#dde6cf'},
    "sunburst" => {:bg => '#000000', :fg => '#f8f8f8'},
    "twilight" => {:bg => '#141414', :fg => '#f8f8f8'},
    "zenburnesque" => {:bg => '#404040', :fg => '#dedede'}
  }
  FILE_TYPES = {'rb' => 'ruby', 'rjs' => 'ruby', 'rxml' => 'ruby_on_rails',
    'rhtml' => 'ruby_on_rails', 'pl' => 'perl', 'pm' => 'perl',
    'html' => 'html', 'applescript' => 'applescript',
    'py' => 'python', 'js' => 'javascript', 'as' => 'actionscript',
    'php' => 'php', 'c' => 'c', 'h' => 'c', 'java' => 'java',
    'markdown' => 'markdown', 'sh' => 'shell-unix-generic',
    'bashrc' => 'shell-unix-generic', 'sql' => 'sql',
    'txt' => 'plain_text', 'textile' => 'textile',
    'xml' => 'xml', 'tld' => 'xml', 'jsp' => 'xml',
    'rss' => 'xml', 'yaml' => 'yaml', 'lisp' => 'lisp',
    'hs' => 'haskell'
  }

  def initialize(file)
    @extention = File.extname(file).delete('.')
    @syntax = FILE_TYPES[@extention]
    @file = file
  end

  Uv.themes.each do |theme|
    define_method("parse_with_#{theme}") do
      parse(theme, true)
    end
  end

  def parse(theme, numbering)
    begin
      File.open(@file) do |f|
        html = Uv.parse( f.read, "xhtml", @syntax, numbering, theme )
        css_file = File.join(Uv.path, %w(render xhtml files css), "#{theme}.css")
        styles = {}
        IO.read(css_file).gsub(/pre\.#{theme}\s+\.(\w+)\s*\{(.+?)\}/m) do
          styles[$1] = $2.gsub(/\s/, "")
        end
        styles.each do |key, value|
          html.gsub!(/class="#{key}"/i, %Q{style="#{value}"})
        end
        html.gsub!(/class="#{theme}"/) { |match| match +
        %Q{ style="background-color:#{BGCOLORS[theme][:bg]};color:#{BGCOLORS[theme][:fg]}"} }
      end
    rescue Exception => e
      puts e
    end
  end
end

if __FILE__ == $0
  themes = Hilite::BGCOLORS.keys
  #  ARGV.each do |file|
  #    theme = themes[rand(themes.length)]
  #    colored_code = Hilite.new(file).parse(theme, true)
  #    puts "<p>#{file} with #{theme}</p>" + colored_code
  #  end
  ARGV.each do |file|
    colored_code = Hilite.new(file).parse_with_cobalt
    puts colored_code #"<p>#{file} with cobalt</p>" + colored_code
  end
end

hilite_shoes.rb

Shoes.setup do
  gem 'textpow'
  gem 'ultraviolet'
end
require "hilite"

@file, @theme = nil, nil
Shoes.app :width => 500, :height => 370, :resizable => false do  
  background "#eed"
  background "#082444", :height => 40

  flow :height => 40, :width => self.width-100, :margin => 5 do
    caption "Highlighting Your Code", :weight => "bold", :stroke => rgb(0.3, 0.8, 0.8)
  end

  flow :height => 45, :width => 100, :margin => 5 do
    button("Create!") do
      if @file.nil?
        alert "Select your File"
      elsif @theme.nil?
        alert "Select a Theme"
      else
        @edit.text = Hilite.new(@file).parse(@theme, @numbering.checked?)
      end
    end
  end
  flow :height => 36 do
    button("Select a file") do
      @file = ask_open_file
      @disp.replace @file
    end
    @disp = para "No file selected"
  end

  flow :height => 36, :margin => 3 do
    list_box :items => Hilite::BGCOLORS.keys do |item|
      @theme = item.text
    end
    @numbering = check
    @numbering.checked = true
    para "Numbering"
  end

  stack :margin => 10 do
    @edit = edit_box :width => width - 20, :height => 200
  end

 flow do
    button "Save" do
      open(ask_save_file, 'w') do |f|
        f.puts @edit.text
      end
    end

    button "Copy" do
      self.clipboard = @edit.text
    end
  end
end