Method: MaRuKu::Out::HTML#to_html_code

Defined in:

lib/maruku/output/to_html.rb

#to_html_code ⇒ Object

# File 'lib/maruku/output/to_html.rb', line 519

def to_html_code
  source = self.raw_code

  code_lang = self.lang || self.attributes[:lang] || @doc.attributes[:code_lang]

  code_lang = 'xml' if code_lang == 'html'
  code_lang = 'css21' if code_lang == 'css'

  use_syntax = get_setting :html_use_syntax

  element =
    if use_syntax && code_lang
      begin
        unless $syntax_loaded
          require 'rubygems'
          require 'syntax'
          require 'syntax/convertors/html'
          $syntax_loaded = true
        end
        convertor = Syntax::Convertors::HTML.for_syntax code_lang

        # eliminate trailing newlines otherwise Syntax crashes
        source = source.sub(/\n*\z/, '')

        html = convertor.convert(source)

        html.gsub!(/\'|'/,''') # IE bug

        d = MaRuKu::HTMLFragment.new(html)
        highlighted = d.to_html.sub(/\A<pre>(.*)<\/pre>\z/m, '\1')
        code = HTMLElement.new('code', { :class => code_lang }, highlighted)

        pre = xelem('pre')
        # add a class here, too, for compatibility with existing implementations
        pre['class'] = code_lang
        pre << code
        pre
      rescue LoadError => e
        maruku_error "Could not load package 'syntax'.\n" +
          "Please install it, for example using 'gem install syntax'."
        to_html_code_using_pre(source, code_lang)
      rescue => e
        maruku_error "Error while using the syntax library for code:\n#{source.inspect}" +
          "Lang is #{code_lang} object is: \n" +
          self.inspect +
          "\nException: #{e.class}: #{e.message}"

        tell_user("Using normal PRE because the syntax library did not work.")
        to_html_code_using_pre(source, code_lang)
      end
    else
      to_html_code_using_pre(source, code_lang)
    end

  color = get_setting(:code_background_color)
  if color != MaRuKu::Globals[:code_background_color]
    element['style'] = "background-color: #{color};"
  end

  add_ws element
end