syntax code

/bookstore/book[1] # Selects the first book element that is the child of the bookstore element. # Note: IE5 and later has implemented that [0] should be the first node, # but according to the W3C standard it should have been [1]!! /bookstore/book[last()] # Selects the last book element that is the child of the bookstore element /bookstore/book[last()-1] # Selects the last but one book element that is the child of the bookstore element /bookstore/book[position()<3] # Selects the first two book elements that are children of the bookstore element //title[@lang] # Selects all the title elements that have an attribute named lang

This code uses the Ruby gem 'syntax' to create an XML file containing the HTML tags around the code, which is then transformed into an HTML file. The working example was first built using coding examples from Howto format ruby code for blogs [wolfman.com] and Formatting Ruby and HTML code for blog posting [blogspot.com]

#!/usr/bin/ruby

#file: ruby2html.rb 

require 'rubygems'
require 'syntax/convertors/html'
require 'projxslt' # <- this is my own class to do an XSLT transform 
require 'rexml/document'
include REXML

class Ruby2Html
  def initialize(rubyfile, htmlfile)
    code = File.read(rubyfile)
    convertor = Syntax::Convertors::HTML.for_syntax "ruby"
    code_html = convertor.convert(code)
    
    tempfile = '../temp/ruby2html.xml'
    xslfile = '../ruby2html/ruby2html.xsl'
    save_file(tempfile, code_html)
    
    px = Projxslt.new(tempfile, xslfile)
    buffer = px.transform()
    save_file(htmlfile, buffer)
    
  end
  
  def save_file(filename, buffer)
    file = File.new(filename, 'w')
    file.puts buffer
    file.close
  end
end

if __FILE__ == $0
  r2h = Ruby2Html.new('ruby2html.rb', '../temp/ruby2html.html')
  puts 'completed'
end

file: ruby2html.xsl

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns="http://www.w3.org/1999/xhtml"
                version="1.0">

  <xsl:output method="html" doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN"
          doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
          encoding="ISO-8859-1"/> 

	<xsl:template match="/">
	<xsl:element name="html">

        <head>
          <title>Sample code</title>
          <link rel="stylesheet" type="text/css" href="ruby2html.css" />
	</head>

	<body>
          <div id="wrap">
          <xsl:apply-templates />
          </div>
	</body> 

	</xsl:element>
	</xsl:template>

	<xsl:template match="pre">
	  <xsl:copy-of select="."/>
	</xsl:template>

</xsl:stylesheet>

Here's the output from the formatted Ruby HTML code [twitxr.com]

Referemce: Syntax Manual [rubyforge.org]

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