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视频助手

使用键盘控制视频播放

目前为 2019-03-29 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name         视频助手
  3. // @namespace    https://github.com/Aoerz/VideoAssistant
  4. // @version      0.1
  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 37: {
  28.           //left
  29.           if (v.currentTime < skipTime) {
  30.             v.currentTime = 0;
  31.             alert("已到达视频开头，无法快退");
  32.           }
  33.           console.log("快退" + skipTime + "s");
  34.           v.currentTime = v.currentTime - skipTime;
  35.           break;
  36.         }
  37.         case 39: {
  38.           //right
  39.           if (v.currentTime > v.duration - skipTime) {
  40.             alert("已到达视频末尾，无法快进");
  41.             v.currentTime = v.duration;
  42.           }
  43.           console.log("快进" + skipTime + "s");
  44.           v.currentTime = v.currentTime + skipTime;
  45.           break;
  46.         }
  47.         case 38: {
  48.           //up
  49.           if (v.volume > 1 - skipVolume) {
  50.             alert("到达最大音量");
  51.             v.volume = 1;
  52.             break;
  53.           }
  54.           console.log("音量放大" + skipVolume * 100 + "%");
  55.           v.volume = v.volume + 0.1;
  56.           break;
  57.         }
  58.         
  59.         case 40: {
  60.           //down
  61.           if (v.volume < skipVolume) {
  62.             alert("到达最小音量");
  63.             v.volume = 0;
  64.             break;
  65.           }
  66.           console.log("音量减小" + skipVolume * 100 + "%");
  67.           v.volume = v.volume - skipVolume;
  68.           break;
  69.         }
  70.         case 32: {
  71.           //pause
  72.           if (v.paused) {
  73.             console.log("播放");
  74.             v.play();
  75.           } else {
  76.             console.log("暂停");
  77.             v.pause();
  78.           }
  79.           break;
  80.         }
  81.         case 70: {
  82.           //fullscreen
  83.           if (!document.fullscreenElement) {
  84.             v.requestFullscreen();
  85.           } else {
  86.             if (document.exitFullscreen) {
  87.               document.exitFullscreen();
  88.             }
  89.           }
  90.           break;
  91.         }
  92.         case 77: {
  93.           //muse
  94.           if (v.volume === 0) {
  95.             v.volume = volumeTemp;
  96.           } else {
  97.             volumeTemp = v.volume;
  98.             v.volume = 0;
  99.           }
  100.           break;
  101.         }
  102.         case 36: {
  103.           //home
  104.           v.currentTime = 0;
  105.           break;
  106.         }
  107.         case 35: {
  108.           //end
  109.           v.currentTime = v.duration;
  110.           break;
  111.         }
  112.       }
  113.     };
  114.   }
  115.   xuetangxAssistant();
  116. })();

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