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Stick YouTube Progress Bar

Stick YouTube video progress bar to the player bottom

目前为 2023-05-16 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name          Stick YouTube Progress Bar
  3. // @version       1.0.7
  4. // @match         https://www.youtube.com/**
  5. // @author        peng-devs
  6. // @namespace     https://greasyfork.org/users/57176
  7. // @description   Stick YouTube video progress bar to the player bottom
  8. // @icon          https://www.youtube.com/s/desktop/c1d331ff/img/favicon_48x48.png
  9. // @grant         none
  10. // @allFrames     true
  11. // @license       MIT
  12. // ==/UserScript==
  13.  
  14. (function() {
  15.   'use strict';
  16.  
  17.   const NAME = "Stick YouTube Progress Bar";
  18.  
  19.   function main() {
  20.     if (!location.pathname.startsWith('/watch') &&
  21.        !location.pathname.startsWith('/live'))
  22.       return
  23.  
  24.     const observer = new MutationObserver((_) => {
  25.       const progress = document.getElementById('stick_progress');
  26.  
  27.       // 如果是直播的話就不用了
  28.       const live_badge = document.querySelector(".ytp-live-badge");
  29.       if (live_badge && getComputedStyle(live_badge).display !== 'none') {
  30.         // TODO: 或許不用砍掉，可以直接用 css 的方式把它藏起來就好了？
  31.         progress?.remove();
  32.         observer.disconnect();
  33.         console.log(`[${NAME}] cancaled in livestream`);
  34.         return;
  35.       }
  36.  
  37.       // 已經建好的可以重複利用
  38.       if (progress) return
  39.  
  40.       // 沒什麼意義，只是拿來判斷 control bar 初始化完了沒
  41.       const progress_bar = document.querySelector(".ytp-progress-list");
  42.       if (!progress_bar) return;
  43.  
  44.       console.log(`[${NAME}] initializing...`);
  45.  
  46.       stick_progress_bar();
  47.  
  48.       observer.disconnect();
  49.       console.log(`[${NAME}] loaded`);
  50.     });
  51.     observer.observe(document.body, { childList: true, subtree: true });
  52.   }
  53.  
  54.   function stick_progress_bar() {
  55.     inject_custom_style(`
  56.  
  57.       #stick_progress {
  58.         display: none;
  59.         z-index: 32;
  60.         position: absolute;
  61.         bottom: 4px;
  62.         width: 97.5%;
  63.         height: 4px;
  64.         margin: 0 1.25%;
  65.         background-color: rgba(255, 255, 255, .2);
  66.       }
  67.  
  68.       .stick_play_progress, .stick_load_progress {
  69.         position: absolute;
  70.         width: 100%;
  71.         height: 100%;
  72.       }
  73.  
  74.       .stick_play_progress, .stick_load_progress {
  75.         transform-origin: left;
  76.         transform: scaleX(0);
  77.       }
  78.  
  79.       .stick_load_progress {
  80.         z-index: 33;
  81.         background-color: rgba(255, 255, 255, .4);
  82.       }
  83.  
  84.       .stick_play_progress {
  85.         z-index: 34;
  86.         background-color: #f00;
  87.       }
  88.  
  89.       .ytp-autohide #stick_progress {
  90.         display: block;
  91.       }
  92.     `);
  93.  
  94.     const progress = document.createElement("div");
  95.     progress.id = "stick_progress";
  96.  
  97.     const play_progress = document.createElement("div");
  98.     play_progress.className = "stick_play_progress";
  99.     progress.append(play_progress);
  100.  
  101.     const load_progress = document.createElement("div");
  102.     load_progress.className = "stick_load_progress";
  103.     progress.append(load_progress);
  104.  
  105.     const player = document.querySelector("#movie_player");
  106.     player.append(progress);
  107.  
  108.     const video = document.querySelector("video");
  109.     video.addEventListener("timeupdate", () => {
  110.       // 只有在自動隱藏的時候才去更新進度條，不想浪費資源
  111.       if (!player.classList.contains("ytp-autohide")) return;
  112.  
  113.       const progress = video.currentTime / video.duration;
  114.       play_progress.style.transform = `scaleX(${progress})`;
  115.  
  116.       const loaded_progress = video.buffered.end(0) / video.duration;
  117.       load_progress.style.transform = `scaleX(${loaded_progress})`;
  118.     });
  119.   }
  120.  
  121.   function inject_custom_style(css) {
  122.     const style = document.createElement("style");
  123.     document.head.append(style);
  124.     style.dataset.source = NAME;
  125.     style.innerHTML = css;
  126.   }
  127.  
  128.   main();
  129.   document.addEventListener('yt-navigate-finish', main, true);
  130.  
  131. })();
  132.