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雨课堂视频回放插件

提升雨课堂视频回放体验，例如按A或S快进快退，按空格暂停，快放速率自定义，下载视频。

  1. // ==UserScript==
  2. // @name         雨课堂视频回放插件
  3. // @namespace    http://bebr2.com/
  4. // @version      0.1
  5. // @description  提升雨课堂视频回放体验，例如按A或S快进快退，按空格暂停，快放速率自定义，下载视频。
  6. // @author       BeBr2
  7. // @match        https://pro.yuketang.cn/*
  8. // @license MIT
  9. // ==/UserScript==
  10.  
  11. (function() {
  12.     'use strict';
  13.     var video = null;
  14.     function load_js() {
  15.         var input = document.createElement("input");
  16.  
  17.         video.playbackRate = 1;
  18.         var vrate = 1;
  19.         document.onkeydown = function (e) {
  20.             if (e.keyCode == 65) {
  21.  
  22.                 if(video.currentTime >= 10){
  23.                     video.currentTime -= 10;}
  24.                 else{
  25.                     video.currentTime = 0;}
  26.  
  27.             } else if (e.keyCode == 68) {
  28.                     video.currentTime += 10;
  29.             } else if (e.keyCode == 32) {
  30.                 video.paused ? video.play() : video.pause();
  31.             } else if (e.keyCode == 13) {
  32.                 if (input == document.activeElement) {
  33.                     if(input.value > 0) {
  34.                         video.playbackRate = input.value;
  35.                         vrate = input.value;
  36.                     }
  37.                 }
  38.             }
  39.         }
  40.  
  41.         function change_rate() {
  42.             video.playbackRate = vrate;
  43.         }
  44.         setInterval(change_rate, 800);
  45.  
  46.         var video_src = video.src;
  47.  
  48.  
  49.         var button = document.createElement("button");
  50.         button.className = "downloadbutton";
  51.         button.textContent = "下载视频";
  52.         button.style.height = "80px";
  53.         button.style.color = "white"
  54.         button.style.background = "#1C223B"
  55.         button.addEventListener("click", clickBotton);
  56.         function clickBotton(){
  57.             if(video_src.substr(0,4) != "blob") {
  58.             window.location.href=video_src;
  59.             }else{alert("blob文件较难下载，请将blob视频转.m3u8，再使用其他插件下载！")};
  60.         }
  61.         button.onmouseover=function () {
  62.             this.style.background = "gray";
  63.         }
  64.         button.onmouseout=function () {
  65.             this.style.background = "#1C223B";
  66.         }
  67.         var side_bar = document.getElementsByClassName('left__menu')[0].getElementsByClassName('top')[0];
  68.         side_bar.appendChild(button);
  69.  
  70.         var speed_bar = document.getElementsByClassName('setting__wrap small')[0];
  71.         if(speed_bar) {
  72.             speed_bar.remove();
  73.         }
  74.  
  75.  
  76.  
  77.         input.placeholder = "请输入倍速";
  78.         input.style.height = "30px";
  79.         input.className = "speedinput";
  80.         input.id = "speedinput";
  81.         input.type = "number"
  82.         input.oninput = function () {
  83.             if(this.value.length>5) this.value=this.value.slice(0,5)
  84.         };
  85.         side_bar.appendChild(input);
  86.     }
  87.  
  88.     function delete_ele() {
  89.         video = null;
  90.         var my_button = document.getElementsByClassName('left__menu')[0].getElementsByClassName('top')[0].getElementsByClassName('downloadbutton')[0];
  91.         var my_input = document.getElementsByClassName('left__menu')[0].getElementsByClassName('top')[0].getElementsByClassName('speedinput')[0];
  92.         if(my_button){my_button.remove()}
  93.         if(my_input){my_input.remove()}
  94.     }
  95.  
  96.         console.log("提升雨课堂视频回放的观看体验! --by BeBr2");
  97.         var ii = 0;
  98.         var url = window.location.href;
  99.         console.log(url);
  100.         function get_video() {
  101.             if(ii != -1) {
  102.                 video = document.querySelector("video");
  103.             }
  104.             if(ii < 20 && ii >= 0) {
  105.                 ii += 1;
  106.             }
  107.  
  108.             if(ii == 20) {
  109.                 console.log("页面找不到视频！");
  110.                 ii += 1;
  111.                 return;
  112.             }
  113.             if (video && ii != -1) {
  114.                load_js();
  115.                 url = window.location.href;
  116.                 ii = -1;
  117.             }
  118.             if(url != window.location.href) {
  119.                 delete_ele();
  120.                 video = document.querySelector("video");
  121.                 if(video) {
  122.                   load_js();
  123.                   ii = -1;
  124.                 } else {
  125.                    ii = 0;
  126.                 }
  127.                 url = window.location.href;
  128.             }
  129.         }
  130.  
  131.         setInterval(get_video, 2000);
  132.  
  133.  
  134. })();

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