// ==UserScript==
// @namespace   http://mrob.com/time/scripts-beta
// @name        s/leverage/use/g by mrob27
// @description Replaces all forms of the word "leverage" with "use".
// @author      Robert Munafo (based on work by Eternal Density)
// @version     67023.9842
// @downloadURL http://mrob.com/time/scripts-beta/s-leverage-use.user.js.txt
// @match       *://*/*
// ==/UserScript==

// REVISION HISTORY:
//
// np67023.9842: Based on s/pony/leopard/g

function leopardize(str)
{
  return str.replace(/leverag/g,"us")
    .replace(/Leverag/g,"Us")
    //.replace(/(?<!my pants|\.)\.( |$)/gi,' in my pants.$1') //invalid group???
    ;
};

var replacingContent = false;

function replaceTextContent(node)
{
  //flag that content is being replaced so the event it generates
  //won't trigger another replacement
  replacingContent = true;
  node.textContent = leopardize(node.textContent);
  replacingContent = false;
};

/* This recursively (depth-first) traverses a given DOM node and its
   subnodes for text, and applies the leopard filter to each. */
function changeTextNodes(node)
{
  var length, childNodes;

  //If this is a text node, leopardize it
  if (node.nodeType == Node.TEXT_NODE) {
    replaceTextContent(node);
  //If this is anything other than a text node, recurse any children
  } else {
    childNodes = node.childNodes;
    length = childNodes.length;
    for (var i=0; i<length; ++i) {
      changeTextNodes(childNodes[i]);
    }
  }
};

function insertion_listener(event) {
  //change any new text nodes in a node that is added to the body
  changeTextNodes(event.target);
};

function cdm_listener(event) {
  // avoid infinite loop by ignoring events triggered by our own replacement
  if (!replacingContent) {
    replaceTextContent(event.target);
  }
};

changeTextNodes(document.body);
document.title = leopardize(document.title);
document.body.addEventListener("DOMNodeInserted", insertion_listener, false);
document.body.addEventListener("DOMCharacterDataModified",
                                                        cdm_listener, false);