☰

UnURLencode

Decode percent-encoded text on visited web pages

  1. // ==UserScript==
  2. // @name         UnURLencode
  3. // @namespace    lainscripts_unurlencode
  4. // @version      0.2
  5. // @description  Decode percent-encoded text on visited web pages
  6. // @author       lainverse
  7. // @match        *://*/*
  8. // @grant        none
  9. // ==/UserScript==
  10.  
  11. (function() {
  12.     'use strict';
  13.     let pctdetect = /%[0-9A-F][0-9A-F]/,
  14.         pctmatch = /(%[0-9A-F][0-9A-F])+/g;
  15.     function crawler(node) {
  16.         switch (node.nodeType) {
  17.             case Node.ELEMENT_NODE:
  18.                 for (let child of node.childNodes) {
  19.                     if (pctdetect.test(child.textContent)) {
  20.                         crawler(child);
  21.                     }
  22.                 }
  23.                 break;
  24.             case Node.TEXT_NODE:
  25.                 node.nodeValue = node.nodeValue.replace(pctmatch, function(match){
  26.                     try {
  27.                         return decodeURIComponent(match);
  28.                     } catch(ignore) {
  29.                         return match;
  30.                     }
  31.                 });
  32.         }
  33.     }
  34.     crawler(document.documentElement);
  35.  
  36.     let o = new MutationObserver(function(mutations) {
  37.         let mutation, node;
  38.         for (mutation of mutations) {
  39.             for (node of mutation.addedNodes) {
  40.                 crawler(node);
  41.             }
  42.         }
  43.     });
  44.     o.observe(document.documentElement, {
  45.         childList: true,
  46.         characterData: true,
  47.         subtree: true
  48.     });
  49. })();