// ==UserScript==
// @name		trick link detector
// @version		1.1
// @namespace		reddit_listen2
// @description		Based on a Chrome plugin by /u/filipekiss
// @include		http*
// ==/UserScript==

urlRegex = /^http(?:s?):\/\/.+/i

String.prototype.unescapeHtml = function () {
	var temp = document.createElement("div");
	temp.innerHTML = this;
	var result = temp.childNodes[0].nodeValue;
	temp.removeChild(temp.firstChild);
	return result;
}

var as = document.getElementsByTagName("a");

for (var i = 0; i < as.length; i++) {
	if (as[i].innerHTML.match(urlRegex) && as[i].innerHTML != as[i].href) {
		//now we have a potential match. redo the check with all unescaped characters to be sure
		if (as[i].innerHTML.unescapeHtml() !== as[i].href.unescapeHtml()) {
			var warning = document.createElement("span");
			warning.style.display = "inline-block";
			warning.style.padding = "2px";
			warning.style.backgroundColor = "#F00";
			warning.style.color = "#FFF";
			warning.style.border = "1px solid #760A00";
			warning.style.borderRadius = "2px";
			warning.style.margin = "0px 3px";
			warning.style.fontSize = "x-small";
			warning.innerHTML = "!!";
			as[i].parentNode.insertBefore(warning, as[i].nextSibling);
		}
	}
}