-

// ==UserScript==
// @name         Side-by-side view on gitlab
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       Krzys
// @match        http://gitlab.oddshot.tv/*
// @grant        none
// ==/UserScript==
/* jshint -W097 */
'use strict';

// Add this:
var _wr = function(type) {
    var orig = history[type];
    return function() {
        var rv = orig.apply(this, arguments);
        var e = new Event(type);
        e.arguments = arguments;
        window.dispatchEvent(e);
        return rv;
    };
};
history.pushState = _wr('pushState'), history.replaceState = _wr('replaceState');

window.addEventListener('replaceState', function(e) {
    fire();
});

var _getVars = function() {
    var vars = {}, hash;
    var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
    for(var i = 0; i < hashes.length; i++)
    {
        hash = hashes[i].split('=');
        vars[hash[0]] = hash[1];
    }
    return vars;
}

var timeout;

var fire = function() {
    timeout && window.clearTimeout(timeout);
    if (window.location.pathname.endsWith('/diffs')) {
        var vars = _getVars();
        if (vars["view"] === undefined) {
            var handler = () => {
                var element = $('a[href*="parallel"]').get(0);
                if (element) element.click();
                else timeout = window.setTimeout(handler, 100);
            };
            handler();
        }
    }
}

fire();