TPT Syntax Highlighted Code Boxes

Syntax highlights <code> boxes on the powder toy forums.
Versão de: 30/11/2014. Veja: a última versão.
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// ==UserScript==
// @name TPT Syntax Highlighted Code Boxes
// @version 1.0.0
// @description Syntax highlights <code> boxes on the powder toy forums.
// @author boxmein
// @match *://powdertoy.co.uk/Discussions/Thread/*
// @namespace http://boxmein.net
// @id [email protected]
// ==/UserScript==
// last updated: Mon Dec 01 2014 00:26:43 GMT+0200 (FLE Standard Time)
 
// Highlight.js is the highlighting library.
var HLJS = "//cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/highlight.min.js";
 
// Language support for Lua isn't included in ^that distribution by default
var LUA = "//cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/languages/lua.min.js";
 
// Highlight.js only slaps on class names, you also need to style the classes! 
var HL_STYLE = "//cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/styles/github.min.css";
 
 
(function() {
  'use strict';
  
  // Runs a function in the document. Basically like a Content Script.
  // http://wiki.greasespot.net/Content_Script_Injection
  function contentEval(source) {
 
    // Check for function input.
    if ('function' == typeof source) {
      // Execute this function with no arguments, by adding parentheses.
      // One set around the function, required for valid syntax, and a
      // second empty set calls the surrounded function.
      source = '(' + source + ')();'
    }
 
    // Create a script node holding this  source code.
    var script = document.createElement('script');
    script.setAttribute("type", "application/javascript");
    script.textContent = source;
 
    // Insert the script node into the page, so it will run, and immediately
    // remove it to clean up.
    document.body.appendChild(script);
    //document.body.removeChild(script);
  }
 
 
  // Given a src attribute, makes a <script> tag into the end of <body>
  function contentScript(source) {
    var tag = document.createElement('script');
    tag.setAttribute('type', 'application/javascript');
    tag.src = source;
 
    document.body.appendChild(tag);
    //document.body.removeChild(tag);
    return tag;
  }
 
  contentScript(HLJS);
 
  // Set an ID, because after *that* loads, hljs is finally ready to highlight
  // Lua as well as C++.
  var tag = contentScript(LUA);
  tag.id = "luaapi";
 
 
  // Add the CSS for good measure too
  var st = document.createElement('link');
  st.type = 'text/css';
  st.rel = 'stylesheet';
  st.href = HL_STYLE;
  document.head.appendChild(st);
 
  contentEval(function() {
 
    function highlightCode(){
      // by default hljs highlights <pre><code>, have to override
      var ds = document.querySelectorAll('code');
      for(var d = 0; d < ds.length; d++)
        window.hljs.highlightBlock(ds[d]);  
    }
    
    window.highlightCode = highlightCode;
 
    document.getElementById('luaapi').onload = highlightCode;
  });
 
})();