☰

视频助手

使用键盘控制视频播放

  1. // ==UserScript==
  2. // @name         视频助手
  3. // @namespace    https://github.com/Aoerz/UserScripts
  4. // @version      0.2
  5. // @description  使用键盘控制视频播放
  6. // @author       Aoerz
  7. // @include      https://www.icourse163.org/*
  8. // @include      https://www.xuetangx.com/*
  9. // @include      https://www.coursera.org/*
  10. // @include      https://www.bilibili.com/*
  11. // @include      https://v.qq.com/*
  12. // @include      https://www.iqiyi.com/*
  13. // @include      https://v.youku.com/*
  14. // @grant        none
  15. // ==/UserScript==
  16. (function() {
  17.   "use strict";
  18.   var skipTime = 10;
  19.   var skipVolume = 0.1;
  20.   var volumeTemp;
  21.   function xuetangxAssistant() {
  22.     document.onkeydown = function(e) {
  23.       var evt = e || window.event;
  24.       var v = document.querySelector("video");
  25.       event.preventDefault();
  26.       switch (evt.keyCode) {
  27.         case 90:
  28.         case 37: {
  29.           //left
  30.           if (v.currentTime < skipTime) {
  31.             v.currentTime = 0;
  32.             alert("已到达视频开头，无法快退");
  33.           }
  34.           console.log("快退" + skipTime + "s");
  35.           v.currentTime = v.currentTime - skipTime;
  36.           break;
  37.         }
  38.         case 88:
  39.         case 39: {
  40.           //right
  41.           if (v.currentTime > v.duration - skipTime) {
  42.             alert("已到达视频末尾，无法快进");
  43.             v.currentTime = v.duration;
  44.           }
  45.           console.log("快进" + skipTime + "s");
  46.           v.currentTime = v.currentTime + skipTime;
  47.           break;
  48.         }
  49.         case 68:
  50.         case 38: {
  51.           //up
  52.           if (v.volume > 1 - skipVolume) {
  53.             alert("到达最大音量");
  54.             v.volume = 1;
  55.             break;
  56.           }
  57.           console.log("音量放大" + skipVolume * 100 + "%");
  58.           v.volume = v.volume + 0.1;
  59.           break;
  60.         }
  61.         case 83:
  62.         case 40: {
  63.           //down
  64.           if (v.volume < skipVolume) {
  65.             alert("到达最小音量");
  66.             v.volume = 0;
  67.             break;
  68.           }
  69.           console.log("音量减小" + skipVolume * 100 + "%");
  70.           v.volume = v.volume - skipVolume;
  71.           break;
  72.         }
  73.         case 32: {
  74.           //pause
  75.           if (v.paused) {
  76.             console.log("播放");
  77.             v.play();
  78.           } else {
  79.             console.log("暂停");
  80.             v.pause();
  81.           }
  82.           break;
  83.         }
  84.         case 70: {
  85.           //fullscreen
  86.           if (!document.fullscreenElement) {
  87.             v.requestFullscreen();
  88.           } else {
  89.             if (document.exitFullscreen) {
  90.               document.exitFullscreen();
  91.             }
  92.           }
  93.           break;
  94.         }
  95.         case 77: {
  96.           //muse
  97.           if (v.volume === 0) {
  98.             v.volume = volumeTemp;
  99.           } else {
  100.             volumeTemp = v.volume;
  101.             v.volume = 0;
  102.           }
  103.           break;
  104.         }
  105.         case 36: {
  106.           //home
  107.           v.currentTime = 0;
  108.           break;
  109.         }
  110.         case 35: {
  111.           //end
  112.           v.currentTime = v.duration;
  113.           break;
  114.         }
  115.       }
  116.     };
  117.   }
  118.   xuetangxAssistant();
  119. })();

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