Outlook / Google Search Unmangler - Greasemonkey Script

url-unmangler.user.js

// ==UserScript==
// @name           Google Search / Outlook /Gmail Unmangler
// @namespace      URLUnmangle
// @description    Gmail / Google Search URLs
// @include        http://google.tld/*
// @include        http://www.google.tld/*
// @include        https://mail.google.tld/*
// ==/UserScript==

var URLUnmangle = {};

URLUnmangle.unmangleURL = function(url) {
	var urlIndex = url.indexOf("url="), lastParam, unmangled;
	if (urlIndex == -1) {
		return url;
	}
	urlIndex += 4;

	unmangled = url.substr(urlIndex);
	lastParam = unmangled.indexOf('&');
	
	unmangled = decodeURIComponent(unmangled.substring(0, lastParam));
	return unmangled;
};

function textNodesUnder(el){
  var n, result = "", walk = document.createTreeWalker(el,NodeFilter.SHOW_TEXT,null,false);
  while (n=walk.nextNode()) {
      result += n.textContent;
  }
  return result;
}

URLUnmangle.findMangledURLs = function() {
	var links = document.getElementsByTagName("a"), link, attrs;
	for (var i = 0, ii = links.length; i < ii; ++i) {
		link = links[i];
		attrs = link.attributes;

		for (var attr in attrs) {
			if (attr == "href" || attr == "class") {
				continue;
			}
			link.removeAttribute(attr);
		}
    const new_url = URLUnmangle.unmangleURL(link.href);
    // Outlook rewrites plaintext URLs, which then Gmail picks up and renders
    // them as a big encoded mess.
    if (link.innerHTML.startsWith("http") && textNodesUnder(link) == link.href) {
        link.innerHTML = new_url;
    }
		link.setAttribute('href', new_url);
	}
};

window.addEventListener("load", function(e) {
	unsafeWindow.rwt = function(){};
	URLUnmangle.findMangledURLs();
}, false);