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kalpdev.1 / Battery Light

// ==UserScript==
// @name          Battery Light
// @namespace     kalpsdj
// @author        Shjaisw
// @license       MIT
// @updateURL
// @downloadURL
// @run-at        document-body
// @version       1.0
// @description   Highlights battery text
// @include       https://*/dp/*
// @grant         GM_registerMenuCommand
// @grant         GM_setValue
// @grant         GM_getValue
// ==/UserScript==




(function() {
  'use strict';

  if (window.self !== window.top) { return; }


  function setUserPref(varName, defaultVal, menuText, promtText, sep){
    GM_registerMenuCommand(menuText, function() {
      var val = prompt(promtText, GM_getValue(varName, defaultVal));
      if (val === null)  { return; }
      if (sep && val){
        var pat1 = new RegExp('\\s*' + sep + '+\\s*', 'g');
        var pat2 = new RegExp('(?:^' + sep + '+|' + sep + '+$)', 'g');
        val = val.replace(pat1, sep).replace(pat2, '');
      }
      val = val.replace(/\s{2,}/g, ' ').trim();
      GM_setValue(varName, val);
      if(!document.body.querySelector(".THmoa")) THmoa_doHighlight(document.body);
      else location.reload();
    });
  }


  var THmoa_MutOb = (window.MutationObserver) ? window.MutationObserver : window.WebKitMutationObserver;
  if (THmoa_MutOb){
    var THmoa_chgMon = new THmoa_MutOb(function(mutationSet){
      mutationSet.forEach(function(mutation){
        for (var i=0; i<mutation.addedNodes.length; i++){
          if (mutation.addedNodes[i].nodeType == 1){
            THmoa_doHighlight(mutation.addedNodes[i]);
          }
        }
      });
    });

    var opts = {childList: true, subtree: true};
    THmoa_chgMon.observe(document.body, opts);
  }



  function THmoa_doHighlight(el){
    var keywords = GM_getValue('keywords');
    if(!keywords) keywords = "voltage,input,output,AAA,non-rechargeable,Packed with,contained in,magnetized,spillable,NON-SPILLABLE,Non spillable,Digital,power,power bank,pull force,magnet,magnets,AGM,watts,volts,watt,watt hours,watt hour,watt-hours,watt-hour,volt,nimh,nicd,220V,LR44,AG13,NI-MH,Ni-cd,alkaline,LR06,LR03,cr2032,cr2023,rechargeable,charge,charge time,Lipo,polymer,Li-polymer,Li-on,builtin,lithium,lithium-ion,Lithium ion,li-ion,Lithium_metal,Lithium metal,Lithium batteries,Lithium metal batteries,lithium metal battery,lithium-ion batteries,Lithium ion batteries,lithium-ion battery,lithium ion battery,lithium polymer battery,Lithium Battery Packaging,LITHIUM ION BATTERIES CONTAINED IN EQUIPMENT,LITHIUM ION BATTERIES PACKED WITH EQUIPMENT"
    var highlightStyle = GM_getValue('highlightStyle');
    if (!highlightStyle) highlightStyle = "color: #101010; font-weight: bold; background-color: #ffc107;"

    var rQuantifiers = /[-\/\\^$*+?.()|[\]{}]/g;
    keywords = keywords.replace(rQuantifiers, '\\$&').split(',').join('|');
    var pat = new RegExp('(' + keywords + ')', 'gi');
    var span = document.createElement('span');

    var snapElements = document.evaluate(
        './/text()[normalize-space() != "" ' +
        'and not(ancestor::style) ' +
        'and not(ancestor::script) ' +
        'and not(ancestor::textarea) ' +
        'and not(ancestor::code) ' +
        'and not(ancestor::pre)]',
        el, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);

    if (!snapElements.snapshotItem(0)) { return; }

    for (var i = 0, len = snapElements.snapshotLength; i < len; i++) {
      var node = snapElements.snapshotItem(i);
      if (pat.test(node.nodeValue)) {
        if (node.className != "THmoa" && node.parentNode.className != "THmoa"){
          var sp = span.cloneNode(true);
          sp.innerHTML = node.nodeValue.replace(pat, '<span style="' + highlightStyle + '" class="THmoa">$1</span>');
          node.parentNode.replaceChild(sp, node);
        }
      }
    }
  }

  THmoa_doHighlight(document.body);
})();