// ==UserScript==// @name        Echo360 Super Speed// @namespace   https://www.petertanner.dev/// @description Adds faster speed options (4x, 3x) to Echo360 player and allows the user to add their own speed options.// @include     *://echo360.net.au/*// @include     *://echo360.org.uk/*// @include     *://echo360.org/*// @include     *://echo360.ca/*// @include     *://echo360.org.au/*// @version     1.2// @author      Peter Tanner// @namespace   https://github.com/peter-tanner/Echo360-Super-Speed-Userscript/// @supportURL  https://github.com/peter-tanner/Echo360-Super-Speed-Userscript/issues// @license     GPL-3.0// @website     https://www.petertanner.dev/// @run-at      document-start// ==/UserScript==/* USER CUSTOMIZATION BEGIN */// NOTE: Add (or remove) speeds to this array to your liking.// Note that there is a browser set limit of 16x, and speeds above 4x are muted.// https://searchfox.org/mozilla-central/rev/f1c881ba5603410dacbe52874053af38bd825c3b/dom/html/HTMLMediascript_Element.cpp#179-183const selected_speeds = [4, 3, 2, 1.75, 1.5, 1.25, 1, 0.75];// const selected_speeds = [2, 1.75, 1.5, 1.25, 1, 0.75, 0.5, 0.25]; // Default Echo360 speeds.// NOTE: Change this to modify how much the speed changes when you use the < or// > hotkey to change speedconst speed_hotkey_increment = 0.25;/* USER CUSTOMIZATION END */// The code in compatible string representation since we are putting strings in// script tags instead of executing them here.const speed_code_txt ="[" +selected_speeds.map((speed) => `{label:"${speed}x",value:${speed}}`).join(",") +"]";const max_speed = Math.max(...selected_speeds);const min_speed = Math.min(...selected_speeds);// The page contains a script tag which is called after the player bundle// `echoPlayerV2FullApp.react-bundle.js` is downloaded. This tag is generated// with the page and contains information about the video (such as the title,// institution and thumbnail paths) and calls the player with this information.// This contextual information is stored in the variable to be called after the// player is modified.var player_calling_context ="console.error('Echo360 super speed failed to load :(')";new MutationObserver(async (mutations, observer) => {let script_elem = mutations.flatMap((e) => [...e.addedNodes]).filter((e) => e.tagName === "SCRIPT").find((e) => e.src.match(/echoPlayerV2FullApp\.react-bundle\.js/));if (script_elem) {// Do not load the unmodified player codeobserver.disconnect();script_elem.remove();// Download the player code for modification...await fetch(script_elem.src).then((e) => e.text()).then((player_code) => {player_code = player_code.replace(// Overwrite all previous speeds in case the user wants to remove the// default speeds'[{label:"2x",value:2},{label:"1.75x",value:1.75},{label:"1.5x",value:1.5},{label:"1.25x",value:1.25},{label:"1x",value:1},{label:"0.75x",value:.75},{label:"0.5x",value:.5},{label:"0.25x",value:.25}]',// Replace with our custom speedsspeed_code_txt);player_code = player_code.replace(// This code handles hotkeys for changing speed, adjust bounds to match new speeds.'{key:">",handler:function(){b<2&&I(b+.25)}},{key:"<",handler:function(){b>.25&&I(b-.25)}}',`{key:">",handler:function(){b<${max_speed}&&I(b+${speed_hotkey_increment})}},{key:"<",handler:function(){b>${min_speed}&&I(b-${speed_hotkey_increment})}}`);// Add the player calling context code since this event listener does// not block, r###lting in the original player calling code being called// (with a harmless error, since the player code has not loaded by the// time it is called)player_code +=";" +player_calling_context +"; console.log('Echo360 super speed has successfully been loaded :3')";// Create a new script tag containing the modified player & add to headconst new_script = document.createElement("script");new_script.type = "text/javascript";new_script.textContent = player_code;document.getElementsByTagName("head")[0].append(new_script);});}}).observe(document, {childList: true,subtree: true,});window.addEventListener("load",() => {const script_elems = document.getElementsByTagName("script");player_calling_context = script_elems[script_elems.length - 1].innerText;},false);