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GitHub Table of Contents

A userscript that adds a table of contents to readme & wiki pages

  1. // ==UserScript==
  2. // @name        GitHub Table of Contents
  3. // @version     2.1.6
  4. // @description A userscript that adds a table of contents to readme & wiki pages
  5. // @license     MIT
  6. // @author      Rob Garrison
  7. // @namespace   https://github.com/Mottie
  8. // @match       https://github.com/*
  9. // @match       https://gist.github.com/*
  10. // @run-at      document-idle
  11. // @grant       GM_registerMenuCommand
  12. // @grant       GM.registerMenuCommand
  13. // @grant       GM_getValue
  14. // @grant       GM.getValue
  15. // @grant       GM_setValue
  16. // @grant       GM.setValue
  17. // @grant       GM_addStyle
  18. // @grant       GM.addStyle
  19. // @require     https://gf.qytechs.cn/scripts/28721-mutations/code/mutations.js?version=1108163
  20. // @require     https://gf.qytechs.cn/scripts/398877-utils-js/code/utilsjs.js?version=1079637
  21. // @require     https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js?updated=20180103
  22. // @icon        https://github.githubassets.com/pinned-octocat.svg
  23. // @supportURL  https://github.com/Mottie/GitHub-userscripts/issues
  24. // ==/UserScript==
  25.  
  26. /* global $ $$ on addClass removeClass */
  27. (async () => {
  28. 	"use strict";
  29.  
  30. 	const defaults = {
  31. 		title: "Table of Contents", // popup title
  32. 		top: "64px", // popup top position when reset
  33. 		left: "auto", // popup left position when reset
  34. 		right: "10px", // popup right position when reset
  35. 		headerPad: "48px", // padding added to header when TOC is collapsed
  36. 		headerSelector: [".header", ".Header", ".header-logged-out > div"],
  37. 		wrapperSelector: "#wiki-body, #readme, [id^='file-'][id$='-md']",
  38. 		headerWrap: ".js-header-wrapper",
  39. 		toggle: "g+t", // keyboard toggle shortcut
  40. 		restore: "g+r", // keyboard reset popup position shortcut
  41. 		delay: 1000, // ms between keyboard shortcuts
  42. 	};
  43.  
  44. 	GM.addStyle(`
  45. 		/* z-index > 1000 to be above the */
  46. 		.ghus-toc { position:fixed; z-index:1001; min-width:200px; min-height:100px; top:${defaults.top};
  47. 			right:${defaults.right}; resize:both; overflow:hidden; padding: 0 3px 38px 0; margin:0; }
  48. 		.ghus-toc h3 { cursor:move; }
  49. 		.ghus-toc-title { padding-left:20px; }
  50. 		/* icon toggles TOC container & subgroups */
  51. 		.ghus-toc .ghus-toc-icon { vertical-align:baseline; }
  52. 		.ghus-toc h3 .ghus-toc-icon, .ghus-toc li.collapsible .ghus-toc-icon { cursor:pointer; }
  53. 		.ghus-toc .ghus-toc-toggle { position:absolute; width:28px; height:38px; top:0px; left:0px; }
  54. 		.ghus-toc .ghus-toc-toggle svg { margin-top:10px; margin-left:9px; }
  55. 		.ghus-toc .ghus-toc-docs { float:right; }
  56. 		/* move collapsed TOC to top right corner */
  57. 		.ghus-toc.collapsed {
  58. 			width:30px !important; height:34px !important; min-width:auto; min-height:auto; overflow:hidden;
  59. 			top:16px !important; left:auto !important; right:10px !important; margin:0; padding:0;
  60. 			border:1px solid rgba(128, 128, 128, 0.5); border-radius:3px; resize:none;
  61. 		}
  62. 		.ghus-toc.collapsed > h3 { cursor:pointer; padding-top:5px; border:none; background:#222; color:#ddd; }
  63. 		.ghus-toc.collapsed .ghus-toc-docs, .ghus-toc.collapsed .ghus-toc-title { display:none; }
  64. 		.ghus-toc:not(.ghus-toc-hidden).collapsed + .Header { padding-right: ${defaults.headerPad} !important; }
  65. 		/* move header text out-of-view when collapsed */
  66. 		.ghus-toc.collapsed > h3 svg { margin-top:6px; }
  67. 		.ghus-toc-hidden, .ghus-toc.collapsed .boxed-group-inner { display:none; }
  68. 		.ghus-toc .boxed-group-inner { width:100%; height:100%; overflow-x:hidden; overflow-y:auto;
  69. 			margin-bottom:50px; }
  70. 		.ghus-toc ul { list-style:none; }
  71. 		.ghus-toc li { white-space:nowrap; overflow:hidden; text-overflow:ellipsis; position:relative; }
  72. 		.ghus-toc .ghus-toc-h1 { padding-left:15px; }
  73. 		.ghus-toc .ghus-toc-h2 { padding-left:30px; }
  74. 		.ghus-toc .ghus-toc-h3 { padding-left:45px; }
  75. 		.ghus-toc .ghus-toc-h4 { padding-left:60px; }
  76. 		.ghus-toc .ghus-toc-h5 { padding-left:75px; }
  77. 		.ghus-toc .ghus-toc-h6 { padding-left:90px; }
  78. 		/* anchor collapsible icon */
  79. 		.ghus-toc li.collapsible .ghus-toc-icon:before {
  80. 			content:' '; position:absolute; width:20px; height:20px; display:inline-block; left:-16px; top:-14px;
  81. 			background: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIGNsYXNzPSdvY3RpY29uJyBoZWlnaHQ9JzE0JyB2aWV3Qm94PScwIDAgMTIgMTYnPjxwYXRoIGQ9J00wIDVsNiA2IDYtNkgweic+PC9wYXRoPjwvc3ZnPg==) left center no-repeat;
  82. 		}
  83. 		.ghus-toc li.collapsible.collapsed .ghus-toc-icon:before { -webkit-transform:rotate(-90deg);
  84. 			transform:rotate(-90deg); top:-20px; left:-20px; }
  85. 		.ghus-toc-icon svg, .ghus-toc-docs svg { pointer-events:none; }
  86. 		.ghus-toc-no-selection { -webkit-user-select:none !important; -moz-user-select:none !important;
  87. 			user-select:none !important; }
  88. 		/* prevent google translate from breaking links */
  89. 		.ghus-toc li a font { pointer-events:none; }
  90. 	`);
  91.  
  92. 	let tocInit = false;
  93.  
  94. 	// modifiable title
  95. 	let title = await GM.getValue("github-toc-title", defaults.title);
  96.  
  97. 	const container = document.createElement("div");
  98.  
  99. 	// keyboard shortcuts
  100. 	const keyboard = {
  101. 		timer: null,
  102. 		lastKey: null
  103. 	};
  104.  
  105. 	// drag variables
  106. 	const drag = {
  107. 		el: null,
  108. 		elmX: 0,
  109. 		elmY: 0,
  110. 		time: 0,
  111. 		unsel: null
  112. 	};
  113.  
  114. 	const regex = {
  115. 		quote: /'/g,
  116. 		doubleQuote: /"/g,
  117. 		number: /\d/,
  118. 		toggle: /\+/g,
  119. 		header: /ghus-toc-h\d/,
  120. 		collapsible: /collapsible-(\d+)/,
  121. 		ignore: /(input|textarea)/i,
  122. 	};
  123.  
  124. 	const stopPropag = event => {
  125. 		event.preventDefault();
  126. 		event.stopPropagation();
  127. 	};
  128.  
  129. 	// drag code adapted from http://jsfiddle.net/tovic/Xcb8d/light/
  130. 	function dragInit(event) {
  131. 		if (!container.classList.contains("collapsed")) {
  132. 			drag.el = container;
  133. 			drag.elmX = event.pageX - drag.el.offsetLeft;
  134. 			drag.elmY = event.pageY - drag.el.offsetTop;
  135. 			selectionToggle(true);
  136. 		} else {
  137. 			drag.el = null;
  138. 		}
  139. 		drag.time = new Date().getTime() + 500;
  140. 	}
  141.  
  142. 	function dragMove(event) {
  143. 		if (drag.el !== null) {
  144. 			drag.el.style.left = `${event.pageX - drag.elmX}px`;
  145. 			drag.el.style.top = `${event.pageY - drag.elmY}px`;
  146. 			drag.el.style.right = "auto";
  147. 		}
  148. 	}
  149.  
  150. 	async function dragStop(event) {
  151. 		if (drag.el !== null) {
  152. 			dragSave();
  153. 			selectionToggle();
  154. 		}
  155. 		drag.el = null;
  156.  
  157. 		if (event.target === container) {
  158. 			// save container size on mouseup
  159. 			await GM.setValue(
  160. 				"github-toc-size",
  161. 				[container.clientWidth, container.clientHeight]
  162. 			);
  163. 		}
  164. 	}
  165.  
  166. 	async function dragSave(restore) {
  167. 		let adjLeft = null;
  168. 		let top = null;
  169. 		let val = null;
  170. 		if (restore) {
  171. 			// position restore (reset) popup to default position
  172. 			setPosition(defaults.left, defaults.top, defaults.right);
  173. 		} else {
  174. 			// Adjust saved left position to be measured from the center of the window
  175. 			// See issue #102
  176. 			const winHalf = window.innerWidth / 2;
  177. 			const left = winHalf - parseInt(container.style.left, 10);
  178. 			adjLeft = left * (left > winHalf ? 1 : -1);
  179. 			top = parseInt(container.style.top, 10);
  180. 			val = [adjLeft, top];
  181. 		}
  182. 		drag.elmX = adjLeft;
  183. 		drag.elmY = top;
  184. 		await GM.setValue("github-toc-location", val);
  185. 	}
  186.  
  187. 	function resize(_, left = drag.elmX, top = drag.elmY) {
  188. 		if (left !== null) {
  189. 			drag.elmX = left;
  190. 			drag.elmY = top;
  191. 			setPosition(((window.innerWidth / 2) + left) + "px", top + "px");
  192. 		}
  193. 	}
  194.  
  195. 	function setPosition(left, top, right = "auto") {
  196. 		container.style.left = left;
  197. 		container.style.right = right;
  198. 		container.style.top = top;
  199. 	}
  200.  
  201. 	async function setSize() {
  202. 		const size = await GM.getValue("github-toc-size", [250, 250]);
  203. 		container.style.width = `${size[0]}px`;
  204. 		container.style.height = `${size[1]}px`;
  205. 	}
  206.  
  207. 	// stop text selection while dragging
  208. 	function selectionToggle(disable) {
  209. 		const body = $("body");
  210. 		if (disable) {
  211. 			// save current "unselectable" value
  212. 			drag.unsel = body.getAttribute("unselectable");
  213. 			body.setAttribute("unselectable", "on");
  214. 			body.classList.add("ghus-toc-no-selection");
  215. 			on(body, "onselectstart", stopPropag);
  216. 		} else {
  217. 			if (drag.unsel) {
  218. 				body.setAttribute("unselectable", drag.unsel);
  219. 			}
  220. 			body.classList.remove("ghus-toc-no-selection");
  221. 			off(body, "onselectstart", stopPropag);
  222. 		}
  223. 		removeSelection();
  224. 	}
  225.  
  226. 	function removeSelection() {
  227. 		// remove text selection - http://stackoverflow.com/a/3171348/145346
  228. 		const sel = window.getSelection ? window.getSelection() : document.selection;
  229. 		if (sel) {
  230. 			if (sel.removeAllRanges) {
  231. 				sel.removeAllRanges();
  232. 			} else if (sel.empty) {
  233. 				sel.empty();
  234. 			}
  235. 		}
  236. 	}
  237.  
  238. 	async function tocShow() {
  239. 		container.classList.remove("collapsed");
  240. 		await GM.setValue("github-toc-hidden", false);
  241. 	}
  242.  
  243. 	async function tocHide() {
  244. 		container.classList.add("collapsed");
  245. 		await GM.setValue("github-toc-hidden", true);
  246. 	}
  247.  
  248. 	function tocToggle() {
  249. 		// don't toggle content on long clicks
  250. 		if (drag.time > new Date().getTime()) {
  251. 			if (container.classList.contains("collapsed")) {
  252. 				tocShow();
  253. 			} else {
  254. 				tocHide();
  255. 			}
  256. 		}
  257. 	}
  258. 	// hide TOC entirely, if no rendered markdown detected
  259. 	function tocView(isVisible) {
  260. 		const toc = $(".ghus-toc");
  261. 		if (toc) {
  262. 			toc.classList.toggle("ghus-toc-hidden", !isVisible);
  263. 		}
  264. 	}
  265.  
  266. 	function tocAdd() {
  267. 		if (!tocInit) {
  268. 			return;
  269. 		}
  270. 		const wrapper = $(defaults.wrapperSelector);
  271. 		if (wrapper) {
  272. 			let indx, header, anchor, txt;
  273. 			let content = "<ul>";
  274. 			const anchors = $$(".markdown-body .anchor", wrapper);
  275. 			const len = anchors.length;
  276. 			if (len > 1) {
  277. 				for (indx = 0; indx < len; indx++) {
  278. 					anchor = anchors[indx];
  279. 					if (anchor.parentElement) {
  280. 						header = anchor.parentElement;
  281. 						// replace single & double quotes with right angled quotes
  282. 						txt = header.textContent
  283. 							.trim()
  284. 							.replace(regex.quote, "&#8217;")
  285. 							.replace(regex.doubleQuote, "&#8221;");
  286. 						content += `
  287. 							<li class="ghus-toc-${header.nodeName.toLowerCase()}">
  288. 								<span class="ghus-toc-icon octicon ghd-invert"></span>
  289. 								<a href="${anchor.hash}" title="${txt}">${txt}</a>
  290. 							</li>
  291. 						`;
  292. 					}
  293. 				}
  294. 				$(".boxed-group-inner", container).innerHTML = content + "</ul>";
  295. 				tocView(true);
  296. 				listCollapsible();
  297. 			} else {
  298. 				tocView();
  299. 			}
  300. 		} else {
  301. 			tocView();
  302. 		}
  303. 	}
  304.  
  305. 	function listCollapsible() {
  306. 		let indx, el, next, count, num, group;
  307. 		const els = $$("li", container);
  308. 		const len = els.length;
  309. 		for (indx = 0; indx < len; indx++) {
  310. 			count = 0;
  311. 			group = [];
  312. 			el = els[indx];
  313. 			next = el?.nextElementSibling;
  314. 			if (next) {
  315. 				num = el.className.match(regex.number)[0];
  316. 				while (next && !next.classList.contains("ghus-toc-h" + num)) {
  317. 					if (next.className.match(regex.number)[0] > num) {
  318. 						count++;
  319. 						group[group.length] = next;
  320. 					}
  321. 					next = next.nextElementSibling;
  322. 				}
  323. 				if (count > 0) {
  324. 					el.className += " collapsible collapsible-" + indx;
  325. 					addClass(group, "ghus-toc-childof-" + indx);
  326. 				}
  327. 			}
  328. 		}
  329. 		group = [];
  330. 	}
  331.  
  332. 	function toggleChildrenHandler(event) {
  333. 		// Allow doc link to work
  334. 		if (event.target.nodeName === "A") {
  335. 			return;
  336. 		}
  337. 		stopPropag(event);
  338. 		// click on icon, then target LI parent
  339. 		let els, name, indx;
  340. 		const el = event.target.closest("li");
  341. 		const collapse = el?.classList.contains("collapsed");
  342. 		if (event.target.classList.contains("ghus-toc-icon")) {
  343. 			if (event.shiftKey) {
  344. 				name = el.className.match(regex.header);
  345. 				els = name ? $$("." + name, container) : [];
  346. 				indx = els.length;
  347. 				while (indx--) {
  348. 					collapseChildren(els[indx], collapse);
  349. 				}
  350. 			} else {
  351. 				collapseChildren(el, collapse);
  352. 			}
  353. 			removeSelection();
  354. 		}
  355. 	}
  356.  
  357. 	function collapseChildren(el, collapse) {
  358. 		const name = el?.className.match(regex.collapsible);
  359. 		const children = name ? $$(".ghus-toc-childof-" + name[1], container) : null;
  360. 		if (children) {
  361. 			if (collapse) {
  362. 				el.classList.remove("collapsed");
  363. 				removeClass(children, "ghus-toc-hidden");
  364. 			} else {
  365. 				el.classList.add("collapsed");
  366. 				addClass(children, "ghus-toc-hidden");
  367. 			}
  368. 		}
  369. 	}
  370.  
  371. 	// keyboard shortcuts
  372. 	// GitHub hotkeys are set up to only go to a url, so rolling our own
  373. 	function keyboardCheck(event) {
  374. 		clearTimeout(keyboard.timer);
  375. 		// use "g+t" to toggle the panel; "g+r" to reset the position
  376. 		// keypress may be needed for non-alphanumeric keys
  377. 		const tocToggleKeys = defaults.toggle.split("+");
  378. 		const tocReset = defaults.restore.split("+");
  379. 		const key = String.fromCharCode(event.which).toLowerCase();
  380. 		const panelHidden = container.classList.contains("collapsed");
  381.  
  382. 		// press escape to close the panel
  383. 		if (event.which === 27 && !panelHidden) {
  384. 			tocHide();
  385. 			return;
  386. 		}
  387. 		// prevent opening panel while typing in comments
  388. 		if (regex.ignore.test(document.activeElement.nodeName)) {
  389. 			return;
  390. 		}
  391. 		// toggle TOC (g+t)
  392. 		if (keyboard.lastKey === tocToggleKeys[0] && key === tocToggleKeys[1]) {
  393. 			if (panelHidden) {
  394. 				tocShow();
  395. 			} else {
  396. 				tocHide();
  397. 			}
  398. 		}
  399. 		// reset TOC window position (g+r)
  400. 		if (keyboard.lastKey === tocReset[0] && key === tocReset[1]) {
  401. 			container.setAttribute("style", "");
  402. 			setSize();
  403. 			dragSave(true);
  404. 		}
  405. 		keyboard.lastKey = key;
  406. 		keyboard.timer = setTimeout(() => {
  407. 			keyboard.lastKey = null;
  408. 		}, defaults.delay);
  409. 	}
  410.  
  411. 	async function init() {
  412. 		// there is no ".header" on github.com/contact; and some other pages
  413. 		const header = $([...defaults.headerSelector, defaults.headerWrap].join(","));
  414. 		if (!header || tocInit) {
  415. 			return;
  416. 		}
  417. 		// insert TOC after header
  418. 		const location = await GM.getValue("github-toc-location", null);
  419. 		// restore last position
  420. 		resize(null, ...(location ? location : [null]));
  421.  
  422. 		// TOC saved state
  423. 		const hidden = await GM.getValue("github-toc-hidden", false);
  424. 		setSize();
  425. 		container.className = "ghus-toc boxed-group wiki-pages-box readability-sidebar" + (hidden ? " collapsed" : "");
  426. 		container.setAttribute("role", "navigation");
  427. 		container.setAttribute("unselectable", "on");
  428. 		container.setAttribute("index", "0");
  429. 		container.innerHTML = `
  430. 			<h3 class="js-wiki-toggle-collapse wiki-auxiliary-content" data-hotkey="${defaults.toggle.replace(regex.toggle, " ")}">
  431. 				<span class="ghus-toc-toggle ghus-toc-icon">
  432. 					<svg class="octicon" height="14" width="14" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 16 12">
  433. 						<path d="M2 13c0 .6 0 1-.6 1H.6c-.6 0-.6-.4-.6-1s0-1 .6-1h.8c.6 0 .6.4.6 1zm2.6-9h6.8c.6 0 .6-.4.6-1s0-1-.6-1H4.6C4 2 4 2.4 4 3s0 1 .6 1zM1.4 7H.6C0 7 0 7.4 0 8s0 1 .6 1h.8C2 9 2 8.6 2 8s0-1-.6-1zm0-5H.6C0 2 0 2.4 0 3s0 1 .6 1h.8C2 4 2 3.6 2 3s0-1-.6-1zm10 5H4.6C4 7 4 7.4 4 8s0 1 .6 1h6.8c.6 0 .6-.4.6-1s0-1-.6-1zm0 5H4.6c-.6 0-.6.4-.6 1s0 1 .6 1h6.8c.6 0 .6-.4.6-1s0-1-.6-1z"/>
  434. 					</svg>
  435. 				</span>
  436. 				<span class="ghus-toc-title">${title}</span>
  437. 				<a class="ghus-toc-docs tooltipped tooltipped-w" aria-label="Go to documentation" href="https://github.com/Mottie/GitHub-userscripts/wiki/GitHub-table-of-contents">
  438. 					<svg class="octicon" xmlns="http://www.w3.org/2000/svg" height="16" width="14" viewBox="0 0 16 14">
  439. 						<path d="M6 10h2v2H6V10z m4-3.5c0 2.14-2 2.5-2 2.5H6c0-0.55 0.45-1 1-1h0.5c0.28 0 0.5-0.22 0.5-0.5v-1c0-0.28-0.22-0.5-0.5-0.5h-1c-0.28 0-0.5 0.22-0.5 0.5v0.5H4c0-1.5 1.5-3 3-3s3 1 3 2.5zM7 2.3c3.14 0 5.7 2.56 5.7 5.7S10.14 13.7 7 13.7 1.3 11.14 1.3 8s2.56-5.7 5.7-5.7m0-1.3C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7S10.86 1 7 1z" />
  440. 					</svg>
  441. 				</a>
  442. 			</h3>
  443. 			<div class="boxed-group-inner wiki-auxiliary-content wiki-auxiliary-content-no-bg"></div>
  444. 		`;
  445.  
  446. 		// add container
  447. 		const el = $(defaults.headerSelector.join(","));
  448. 		el.parentElement.insertBefore(container, el);
  449.  
  450. 		// make draggable
  451. 		on($("h3", container), "mousedown", dragInit);
  452. 		on(document, "mousemove", dragMove);
  453. 		on(document, "mouseup", dragStop);
  454. 		// toggle TOC
  455. 		on($(".ghus-toc-icon", container), "mouseup", tocToggle);
  456. 		on($("h3", container), "dblclick", tocHide);
  457. 		// prevent container content selection
  458. 		on(container, "onselectstart", stopPropag);
  459. 		on(container, "click", toggleChildrenHandler);
  460. 		// keyboard shortcuts
  461. 		on(document, "keydown", keyboardCheck);
  462. 		// keep window relative to middle on resize
  463. 		on(window, "resize", resize);
  464.  
  465. 		tocInit = true;
  466. 		tocAdd();
  467. 	}
  468.  
  469. 	// Add GM options
  470. 	GM.registerMenuCommand("Set Table of Contents Title", async () => {
  471. 		title = prompt("Table of Content Title:", title);
  472. 		await GM.setValue("github-toc-title", title);
  473. 		$("h3 .ghus-toc-title", container).textContent = title;
  474. 	});
  475.  
  476. 	on(document, "ghmo:container", tocAdd);
  477. 	on(document, "ghmo:preview", tocAdd);
  478. 	init();
  479.  
  480. })();

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