gistfile1.rb

# syntax_helper.rb
module SyntaxHelper
  WhiteListHelper.tags.merge(UV_SYNTAX_TAGS)
  
  def colorize_code(body, options = {})
    options = {:line_numbers => false, :theme => DEFAULT_SYNTAX_STYLE}.merge(options)
    r = RedCloth.new(body || '')
    output = r.gsub(/<code[\.|\:]([\w\-]+)>(.*?)<\/code[\.|\:]?\1?>/m) do
      lang, text = $1, $2
      html = "<notextile>" + code((text || ''), {:syntax => (lang if UV_SYNTAXES.include?(lang))}.merge(options)) + "</notextile>"
    end.to_html
  end
  
  def colorize_paste(paste, options = {})
    options = {:line_numbers => true, :theme => DEFAULT_SYNTAX_STYLE}.merge(options)
    code((paste.body || ''), {:syntax => ( paste.language if UV_SYNTAXES.include?(paste.language))}.merge(options))
  end
end

# initializers/uv_syntax.rb
require 'uv'
UV_THEMES = %w{active4d all_hallows_eve amy blackboard brilliance_black brilliance_dull cobalt dawn eiffel espresso_libre idle iplastic lazy mac_classic magicwb_amiga pastels_on_dark spacecadet sunburst twilight zenburnesque}
DEFAULT_SYNTAX_STYLE = 'mac_classic'
UV_SYNTAXES = Uv.syntaxes.dup
UV_SYNTAX_TAGS = UV_SYNTAXES.map {|s| "code:#{s}" } + UV_SYNTAXES.map {|s| "code.#{s}" }