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YouTube 播放速度记忆

自动切换到你预先设定的播放速度。

目前为 2024-08-15 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name                Youtube Remember Speed
  3. // @name:zh-TW          YouTube 播放速度記憶
  4. // @name:zh-CN          YouTube 播放速度记忆
  5. // @name:ja             YouTube 再生速度メモリー
  6. // @icon                data:image/png;base64,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
  7. // @author              ElectroKnight22
  8. // @namespace           electroknight22_youtube_remember_playback_rate_namespace
  9. // @version             1.0.1
  10. // @match               *://www.youtube.com/*
  11. // @exclude             *://www.youtube.com/live_chat*
  12. // @grant               GM.getValue
  13. // @grant               GM.setValue
  14. // @grant               GM.deleteValue
  15. // @grant               GM.listValues
  16. // @grant               GM_registerMenuCommand
  17. // @grant               GM_unregisterMenuCommand
  18. // @license             MIT
  19. // @description         Automcatically switches to your pre-selected speed.
  20. // @description:zh-TW   自動切換到你預先設定的播放速度。
  21. // @description:zh-CN   自动切换到你预先设定的播放速度。
  22. // @description:ja      自動的に設定した再生速度に替わります。
  23. // ==/UserScript==
  24.  
  25. /*jshint esversion: 11 */
  26.  
  27. (function() {
  28.     "use strict";
  29.  
  30.     const DEBUG = false;
  31.  
  32.     const DEFAULT_SETTINGS = {
  33.         targetSpeed: 1
  34.     };
  35.  
  36.     const speeds = [0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2];
  37.  
  38.     let userSettings = { ...DEFAULT_SETTINGS };
  39.     let menuCommandIds = [];
  40.  
  41.     let doc = document, win = window;
  42.  
  43.     // --------------------
  44.     // --- FUNCTIONS ------
  45.     // --------------------
  46.  
  47.     function debugLog(message, shouldShow = true) {
  48.         if (DEBUG && shouldShow) {
  49.             console.log("YTRS DEBUG | " + message);
  50.         }
  51.     }
  52.  
  53.     // --------------------
  54.     // Attempt to set the video resolution to target quality or the next best quality
  55.     function setSpeed(targetSpeed) {
  56.  
  57.         let ytPlayer = doc.getElementById("movie_player") || doc.getElementsByClassName("html5-video-player")[0];
  58.  
  59.         if (!isValidVideo(ytPlayer)) return;
  60.  
  61.         ytPlayer.setPlaybackRate(targetSpeed);
  62.         debugLog("Trying to set speed to: " + targetSpeed + "x");
  63.  
  64.     }
  65.  
  66.     function isValidVideo(ytPlayer, force) {
  67.  
  68.         if (!ytPlayer?.getAvailableQualityLabels()[0]) {
  69.             debugLog("Video data missing");
  70.             return false;
  71.         }
  72.  
  73.         if (win.location.href.startsWith("https://www.youtube.com/shorts/")) {
  74.             debugLog("Skipping Youtube Shorts");
  75.             return false;
  76.         }
  77.  
  78.         return true;
  79.     }
  80.  
  81.     // --------------------
  82.     // Functions for the speed selection menu
  83.  
  84.     function createSpeedMenu() {
  85.         GM_registerMenuCommand("Set Speed (show/hide)", () => {
  86.             menuCommandIds.length ? removeSpeedMenuItems() : showSpeedMenuItems();
  87.         }, {
  88.             autoClose: false
  89.         });
  90.     }
  91.  
  92.     function showSpeedMenuItems() {
  93.         removeSpeedMenuItems();
  94.         speeds.forEach((speed) => {
  95.             let speedText = speed + "x";
  96.             if (speed === userSettings.targetSpeed) {
  97.                 speedText += " (selected)";
  98.             }
  99.             let menuCommandId = GM_registerMenuCommand(speedText, () => {
  100.                 setSelectedSpeed(speed);
  101.             }, {
  102.                 autoClose: false,
  103.             });
  104.             menuCommandIds.push(menuCommandId);
  105.         });
  106.     }
  107.  
  108.     function removeSpeedMenuItems() {
  109.         while (menuCommandIds.length) {
  110.             GM_unregisterMenuCommand(menuCommandIds.pop());
  111.         }
  112.     }
  113.  
  114.     function setSelectedSpeed(speed) {
  115.         if (userSettings.targetSpeed == speed) return;
  116.         userSettings.targetSpeed = speed;
  117.         GM.setValue('targetSpeed', speed);
  118.         removeSpeedMenuItems();
  119.         showSpeedMenuItems();
  120.         setSpeed(speed);
  121.     }
  122.  
  123.     // --------------------
  124.     // Sync settings with locally stored values
  125.     async function applySettings() {
  126.         try {
  127.             // Get all keys from GM
  128.             const storedValues = await GM.listValues();
  129.  
  130.             // Write any missing key-value pairs from DEFAULT_SETTINGS to GM
  131.             await Promise.all(Object.entries(DEFAULT_SETTINGS).map(async ([key, value]) => {
  132.                 if (!storedValues.includes(key)) {
  133.                     await GM.setValue(key, value);
  134.                 }
  135.             }));
  136.  
  137.             // Delete any extra keys in GM that are not in DEFAULT_SETTINGS
  138.             await Promise.all(storedValues.map(async key => {
  139.                 if (!(key in DEFAULT_SETTINGS)) {
  140.                     await GM.deleteValue(key);
  141.                 }
  142.             }));
  143.  
  144.             // Retrieve and update user settings from GM
  145.             await Promise.all(
  146.                 storedValues.map(key => GM.getValue(key).then(value => [key, value]))
  147.             ).then(keyValuePairs => keyValuePairs.forEach(([newKey, newValue]) => {
  148.                 userSettings[newKey] = newValue;
  149.             }));
  150.  
  151.             debugLog(Object.entries(userSettings).map(([key, value]) => key + ": " + value).join(", "));
  152.         } catch (error) {
  153.             debugLog("Error when applying settings: " + error.message);
  154.         }
  155.     }
  156.  
  157.     // --------------------
  158.     // Main function
  159.     function main() {
  160.         if (win.self == win.top) { createSpeedMenu(); }
  161.         setSpeed(userSettings.targetSpeed);
  162.         win.addEventListener("loadstart", () => { setSpeed(userSettings.targetSpeed); }, true);
  163.     }
  164.  
  165.     // --------------------
  166.     // Entry Point
  167.     applySettings().then(main);
  168. })();