Caret Patthfinder

caret_pathfinder.user.js

// ==UserScript==
// @name         Caret Pathfinder
// @namespace    ^
// @version      1
// @description  ^^^
// @author       Conor O'Brien
// @match        *://chat.stackexchange.com/*
// @grant        none
// ==/UserScript==

(function(){
	var elements = {}, messages;
	
	function findCarrotMessage(){
		messages = Array.prototype.slice.call(document.querySelectorAll("[id^='message-']"));
		messages.forEach(function(e){
			if(!elements[e.id] && e.className==="message"){
				elements[e.id] = true;
				e.addEventListener("click", function(s){
					// count the number of ^'s
					var num = this.textContent.match(/\^+/g), self = this;
					if(num){
						var maxHash = -1;
						num.forEach(function(k){
							var destinationMessage = messages[Array.from(messages).indexOf(self)-k.length];
							destinationMessage.style.background = "yellow";
							setTimeout(function(e){e.style.background = "";}, 3500, destinationMessage);
							maxHash = Math.max(destinationMessage.id.slice(destinationMessage.id.indexOf("-")+1), maxHash);
							elements[self.id] = false;
						});
						window.location.hash = "#message-" + maxHash;
					}
					this.removeEventListener("click", arguments.callee, false);
				}, false);
			}
		});
	}
	
	setInterval(findCarrotMessage,50);
})();