// ==UserScript==
// @name         释放被网站拦截的浏览器快捷键
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  取消网站的按键捕获，防止用于切换浏览器标签的快捷「cmd+num」被拦截
// @author       User
// @match        *://*/*
// @grant        GM_log
// @run-at       document-start
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function () {
  'use strict';
  // 添加 document.getEventListeners()
  Document.prototype._addEventListener = Document.prototype.addEventListener;
  Document.prototype._removeEventListener = Document.prototype.removeEventListener;
  Document.prototype.addEventListener = function (type, listener, useCapture = false) {
    this._addEventListener(type, listener, useCapture);
    if (!this.eventListenerList) this.eventListenerList = {};
    if (!this.eventListenerList[type]) this.eventListenerList[type] = [];
    this.eventListenerList[type].push({ type, listener, useCapture });
  };
  Document.prototype.removeEventListener = function (type, listener, useCapture = false) {
    this._removeEventListener(type, listener, useCapture);
    if (!this.eventListenerList) this.eventListenerList = {};
    if (!this.eventListenerList[type]) this.eventListenerList[type] = [];
    for (let i = 0; i < this.eventListenerList[type].length; i++) {
      if (
        this.eventListenerList[type][i].listener === listener &&
        this.eventListenerList[type][i].useCapture === useCapture
      ) {
        this.eventListenerList[type].splice(i, 1);
        break;
      }
    }
    if (this.eventListenerList[type].length == 0) {
      delete this.eventListenerList[type];
    }
  };
  Document.prototype.getEventListeners = function (type) {
    if (!this.eventListenerList) this.eventListenerList = {};
    if (type === undefined) return this.eventListenerList;
    return this.eventListenerList[type];
  };

  // 移除document上的keydown按键事件
  try {
    var times = 0;
    var getEventsHandle = setInterval(function () {
      times++;
      var events = document.getEventListeners('keydown') || [];
      GM_log(times + '释放被网站拦截的浏览器快捷键：', events);
      if (events.length) {
        for (var i = 0; i < events.length; i++) {
          document.removeEventListener('keydown', events[i].listener);
          GM_log('已释放被网站拦截的浏览器快捷键：', i);
        }
        clearInterval(getEventsHandle);
      }
      if (times > 50) {
        clearInterval(getEventsHandle);
      }
    }, 500);
  } catch (e) {
    GM_log('释放被网站拦截的浏览器快捷键出错：', e);
  }
})();