Greasemonkey/Tampermonkey script to add hotkeys to the Review mode of Matecat.

matecat_hotkey.js

//Author: Henning Sperr <henning.sperr@gmail.com>,
//        Felix von Drigalski <fvdrigalski@gmail.com>
// License: BSD 3 clause


// ==UserScript==
// @name         Matecat Review Hotkeys
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  try to take over the world!
// @author       Henning Sperr
// @match        https://*.matecat.com/revise/*
// @grant        none
// ==/UserScript==

// This is pretty hacky way to access the elements but for the task its good enough
// Greasemonkey/Tampermonkey script to add hotkeys to the Review mode of Matecat. 
// Ctrl+(1-5) increases the error value of each type of issue, i.e. the radio button selection is shifted one to the right.
// Perfect for keeping your hands on the keyboard while reviewing.

function isDescendant(parent, child) {
     var node = child.parentNode;
     while (node != null) {
         if (node == parent) {
             return true;
         }
         node = node.parentNode;
     }
     return false;
}
// Your code here...
$(document).keydown(function(e) {
  //49-54 is 1, 2, 3, 4, 5 keys as much as we have radio buttons
  if(e.which >= 49 && e.which < 54 && e.ctrlKey ) {
      // ctrl+1 pressed
      var editor = document.getElementsByClassName("editor");
      
      var radios  = document.getElementsByName('t'+(e.which-48));
      var realRadios = []
      for(var i=0; i<radios.length;i++){ 
          if(isDescendant(editor[0], radios[i])){
            realRadios[realRadios.length] = radios[i];
          }
      }
      if(realRadios[0].checked) {
          realRadios[0].checked = false;
          realRadios[1].checked = true;
      } else if (realRadios[1].checked) {
          realRadios[1].checked = false;
          realRadios[2].checked = true;
      } else if (realRadios[2].checked) {
          realRadios[0].checked = true;
          realRadios[2].checked = false;
      }
  } 
});