An alternate, customizable loader for Power+
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// ==UserScript==
// @name Power+ userscript loader
// @namespace https://powerplus.app/
// @version 1.0
// @description An alternate, customizable loader for Power+
// @author jottocraft
// @license MIT
// @icon https://powerplus.app/favicon.png
// @grant none
// @run-at document-start
// @match https://*.instructure.com/power+*
// ==/UserScript==
(function () {
'use strict';
var s;
//Check for light or dark theme
var light = false;
if (window.localStorage.fluidTheme == "light") {
light = true;
} else if (((window.localStorage.fluidTheme == "system") || (window.localStorage.fluidTheme == "auto")) && !window.matchMedia("(prefers-color-scheme: dark)").matches) {
light = true;
}
//Replace canvas 404 page with Power+
const observer = new MutationObserver(mutations => {
mutations.forEach(({ addedNodes }) => {
addedNodes.forEach(node => {
//Power+ preloader
if (node.nodeType === 1 && node.tagName === 'BODY') {
node.innerHTML = /*html*/`
<div dtps="true" id="dtpsNativeOverlay" style="background-color: inherit; position: fixed; top: 0px; left: 0px; width: 100%; height: 100vh; z-index: 99;text-align: center;z-index: 999;transition: opacity 0.2s;">
<img dtps="true" style="height: 100px; margin-top: 132px;" src="${light ? "https://i.imgur.com/0WzWwb1.png" : "https://i.imgur.com/7dDUVh2.png"}" />
<br dtps="true" />
<div dtps="true" class="progress"><div id="dtpsLoadingScreenBar" dtps="true" class="indeterminate"></div></div>
<style dtps="true">body {background-color: ${light ? "white" : "#151515"}; --crxElements: ${light ? "#ececec" : "#2b2b2b"}; --crxText: ${light ? "#333" : "#efefef"}; overflow: hidden;}*,:after,:before{box-sizing:border-box}.progress{background:var(--crxElements);position:relative;width:600px;height:5px;overflow:hidden;border-radius:12px;backdrop-filter:opacity(.4);display:inline-block;margin-top:75px}.progress .indeterminate{position:absolute;background:#e3ba4b;height:5px;animation:indeterminate 1.4s infinite;animation-timing-function:linear}@keyframes indeterminate{0%{width:5%;left:-15%}to{width:100%;left:110%}}p{font-family:BlinkMacSystemFont,-apple-system,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Fira Sans","Droid Sans","Helvetica Neue",Helvetica,Arial,sans-serif;color: var(--crxText);margin-top: 24px;}</style>
</div>
`;
} else if (node.nodeType === 1 && node.tagName === 'HEAD') {
node.innerHTML = /*html*/`
<link dtps="true" rel="shortcut icon" href="https://powerplus.app/favicon.png" type="image/png">
<meta dtps="true" name="viewport" content="width=device-width, initial-scale=1">
<meta dtps="true" charset="utf-8">
<title dtps="true">Power+</title>
<meta dtps="true" name="description" content="A better UI for Canvas LMS">
<meta dtps="true" name="author" content="jottocraft">
`;
} else if (node.nodeType === 1 && node.tagName === 'SCRIPT' && (node.textContent && node.textContent.includes('"current_user"'))) {
//Do nothing for node containing enviornment data for faster load times
} else if (node.nodeType === 1 && node.getAttribute("dtps") != "true") {
//Node is not added by dtps
node.remove();
}
})
})
})
//Start MutationObserver
observer.observe(document.documentElement, {
childList: true,
subtree: true
});
//Get Power+ base URL
var baseURL = "https://powerplus.app";
if (window.localStorage.dtpsLoaderPref == "dev") {
baseURL = "https://dev.dtps.jottocraft.com";
} else if (window.localStorage.githubRepo && (window.localStorage.dtpsLoaderPref == "github")) {
baseURL = "https://jottocraft.github.io/" + window.localStorage.githubRepo;
} else if (window.localStorage.externalReleaseURL && (window.localStorage.dtpsLoaderPref == "external")) {
baseURL = window.localStorage.externalReleaseURL;
} else if (window.localStorage.dtpsLoaderPref == "local") {
baseURL = "http://localhost:2750";
}
//Set DTPS loader parameters
s = document.createElement("script");
s.textContent = "window.dtpsPreLoader = true;window.dtpsBaseURL = '" + baseURL + "'";
s.async = false;
s.setAttribute("dtps", "true");
document.documentElement.appendChild(s);
//Load jQuery
s = document.createElement("script");
s.src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js";
s.async = false;
s.setAttribute("dtps", "true");
document.documentElement.appendChild(s);
//Wait for page to load
window.onload = function () {
//Stop observer
observer.disconnect();
//Determine LMS script to load
var lmsScript = null;
if (window.location.hostname.startsWith("dtechhs")) {
lmsScript = "dtech";
} else {
lmsScript = "canvas";
}
//Check for debugging LMS overrides
if (window.localStorage.dtpsLMSOverride) lmsScript = window.localStorage.dtpsLMSOverride;
//Add script to DOM
s = document.createElement("script");
s.src = baseURL + "/scripts/lms/" + lmsScript + ".js";
s.async = false;
s.setAttribute("dtps", "true");
document.documentElement.appendChild(s);
s.onerror = function () {
//Couldn't load debugging script, fallback to production
if (window.localStorage.dtpsLoaderPref && (window.localStorage.dtpsLoaderPref !== "prod")) {
console.log("[DTPS CHROME] Failed to load debugging script. Falling back to production.");
window.localStorage.dtpsLoaderPref = "prod";
window.location.reload();
} else {
document.getElementById("dtpsLoadingScreenBar").style.animationPlayState = "paused";
document.getElementById("dtpsLoadingScreenStatus").innerText = "Could not load Power+. Please try again later.";
}
};
}
})();