Dyslexic Experience

Read like someone with Dyslexia. Experience it yourself.
Wrap lines
// ==UserScript==
// @name         Dyslexic Experience
// @namespace    http://geon.github.io/programming/2016/03/03/dsxyliea
// @version      1.0
// @description  Read like someone with Dyslexia. Experience it yourself.
// @author       You
// @match        http://tampermonkey.net/index.php?version=3.12.58&ext=dhdg&updated=true
// @grant        none
//* I exported this code directly from "http://geon.github.io/programming/2016/03/03/dsxyliea" The reason I exported this code and uploaded it here is so others, such as 
//* yourself can (somewhat) experience what it is like to have dyslexia in your own point of view while browsing your favorite sites. *//
// ==/UserScript==
 
 
/* jshint -W097 */
 
'use strict';
 
"use strict";
 
$(function(){
 
	var getTextNodesIn = function(el) {
	    return $(el).find(":not(iframe,script)").addBack().contents().filter(function() {
	        return this.nodeType == 3;
	    });
	};
 
	// var textNodes = getTextNodesIn($("p, h1, h2, h3"));
	var textNodes = getTextNodesIn($("*"));
 
 
 
	function isLetter(char) {
		return /^[\d]$/.test(char);
	}
 
 
	var wordsInTextNodes = [];
	for (var i = 0; i < textNodes.length; i++) {
		var node = textNodes[i];
 
		var words = []
 
		var re = /\w+/g;
		var match;
		while ((match = re.exec(node.nodeValue)) != null) {
 
			var word = match[0];
			var position = match.index;
 
			words.push({
				length: word.length,
				position: position
			});
		}
 
		wordsInTextNodes[i] = words;
	};
 
 
	function messUpWords () {
 
		for (var i = 0; i < textNodes.length; i++) {
 
			var node = textNodes[i];
 
			for (var j = 0; j < wordsInTextNodes[i].length; j++) {
 
				// Only change a tenth of the words each round.
				if (Math.random() > 1/10) {
 
					continue;
				}
 
				var wordMeta = wordsInTextNodes[i][j];
 
				var word = node.nodeValue.slice(wordMeta.position, wordMeta.position + wordMeta.length);
				var before = node.nodeValue.slice(0, wordMeta.position);
				var after  = node.nodeValue.slice(wordMeta.position + wordMeta.length);
 
				node.nodeValue = before + messUpWord(word) + after;
			};
		};
	}
 
	function messUpWord (word) {
 
		if (word.length < 3) {
 
			return word;
		}
 
		return word[0] + messUpMessyPart(word.slice(1, -1)) + word[word.length - 1];
	}
 
	function messUpMessyPart (messyPart) {
 
		if (messyPart.length < 2) {
 
			return messyPart;
		}
 
		var a, b;
		while (!(a < b)) {
 
			a = getRandomInt(0, messyPart.length - 1);
			b = getRandomInt(0, messyPart.length - 1);
		}
 
		return messyPart.slice(0, a) + messyPart[b] + messyPart.slice(a+1, b) + messyPart[a] + messyPart.slice(b+1);
	}
 
	// From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random
	function getRandomInt(min, max) {
		
		return Math.floor(Math.random() * (max - min + 1) + min);
	}
 
 
	setInterval(messUpWords, 50);
});
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