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GitHub Table of Contents

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

当前为 2019-09-06 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        GitHub Table of Contents
  3. // @version     2.0.1
  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. // @include     https://github.com/*
  9. // @include     https://gist.github.com/*
  10. // @run-at      document-idle
  11. // @grant       GM_registerMenuCommand
  12. // @grant       GM_getValue
  13. // @grant       GM.getValue
  14. // @grant       GM_setValue
  15. // @grant       GM.setValue
  16. // @grant       GM_addStyle
  17. // @grant       GM.addStyle
  18. // @require     https://greasyfork.org/scripts/28721-mutations/code/mutations.js?version=666427
  19. // @require     https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js?updated=20180103
  20. // @icon        https://github.githubassets.com/pinned-octocat.svg
  21. // ==/UserScript==
  22. (async () => {
  23. 	"use strict";
  24.  
  25. 	const defaults = {
  26. 		title: "Table of Contents", // popup title
  27. 		top: "64px", // popup top position when reset
  28. 		left: "auto", // popup left position when reset
  29. 		right: "10px", // popup right position when reset
  30. 		headerPad: "48px", // padding added to header when TOC is collapsed
  31. 		headerSelector: [".header", ".Header"],
  32. 		headerWrap: ".js-header-wrapper",
  33. 		toggle: "g+t", // keyboard toggle shortcut
  34. 		restore: "g+r", // keyboard reset popup position shortcut
  35. 		delay: 1000, // ms between keyboard shortcuts
  36. 	};
  37.  
  38. 	GM.addStyle(`
  39. 		/* z-index > 1000 to be above the */
  40. 		.ghus-toc { position:fixed; z-index:1001; min-width:200px; top:${defaults.top};
  41. 			right:${defaults.right}; }
  42. 		.ghus-toc h3 { cursor:move; }
  43. 		.ghus-toc-title { padding-left:20px; }
  44. 		/* icon toggles TOC container & subgroups */
  45. 		.ghus-toc .ghus-toc-icon { vertical-align:baseline; }
  46. 		.ghus-toc h3 .ghus-toc-icon, .ghus-toc li.collapsible .ghus-toc-icon { cursor:pointer; }
  47. 		.ghus-toc .ghus-toc-toggle { position:absolute; width:28px; height:38px; top:0px; left:0px; }
  48. 		.ghus-toc .ghus-toc-toggle svg { margin-top:10px; margin-left:9px; }
  49. 		.ghus-toc .ghus-toc-docs { float:right; }
  50. 		/* move collapsed TOC to top right corner */
  51. 		.ghus-toc.collapsed {
  52. 			width:30px; height:30px; min-width:auto; overflow:hidden; top:16px !important; left:auto !important;
  53. 			right:10px !important; border:1px solid rgba(128, 128, 128, 0.5); border-radius:3px;
  54. 		}
  55. 		.ghus-toc.collapsed > h3 { cursor:pointer; padding-top:5px; border:none; background:#222; color:#ddd; }
  56. 		.ghus-toc.collapsed .ghus-toc-docs { display:none; }
  57. 		.ghus-toc:not(.ghus-toc-hidden).collapsed + .Header { padding-right: ${defaults.headerPad} !important; }
  58. 		/* move header text out-of-view when collapsed */
  59. 		.ghus-toc.collapsed > h3 svg { margin-top:6px; }
  60. 		.ghus-toc-hidden, .ghus-toc.collapsed .boxed-group-inner,
  61. 			.ghus-toc li:not(.collapsible) .ghus-toc-icon { display:none; }
  62. 		.ghus-toc .boxed-group-inner { max-width:250px; max-height:400px; overflow-y:auto; overflow-x:hidden; }
  63. 		.ghus-toc ul { list-style:none; }
  64. 		.ghus-toc li { max-width:230px; white-space:nowrap; overflow-x:hidden; text-overflow:ellipsis; }
  65. 		.ghus-toc .ghus-toc-h1 { padding-left:15px; }
  66. 		.ghus-toc .ghus-toc-h2 { padding-left:30px; }
  67. 		.ghus-toc .ghus-toc-h3 { padding-left:45px; }
  68. 		.ghus-toc .ghus-toc-h4 { padding-left:60px; }
  69. 		.ghus-toc .ghus-toc-h5 { padding-left:75px; }
  70. 		.ghus-toc .ghus-toc-h6 { padding-left:90px; }
  71. 		/* anchor collapsible icon */
  72. 		.ghus-toc li.collapsible .ghus-toc-icon {
  73. 			width:16px; height:10px; display:inline-block; margin-left:-16px;
  74. 			background: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIGNsYXNzPSdvY3RpY29uJyBoZWlnaHQ9JzE0JyB2aWV3Qm94PScwIDAgMTIgMTYnPjxwYXRoIGQ9J00wIDVsNiA2IDYtNkgweic+PC9wYXRoPjwvc3ZnPg==) left center no-repeat;
  75. 		}
  76. 		/* on rotate, height becomes width, so this is keeping things lined up */
  77. 		.ghus-toc li.collapsible.collapsed .ghus-toc-icon { -webkit-transform:rotate(-90deg); transform:rotate(-90deg); height:10px; width:12px; margin-right:2px; }
  78. 		.ghus-toc-icon svg, .ghus-toc-docs svg { pointer-events:none; }
  79. 		.ghus-toc-no-selection { -webkit-user-select:none !important; -moz-user-select:none !important; user-select:none !important; }
  80. 	`);
  81.  
  82. 	let tocInit = false;
  83.  
  84. 	// modifiable title
  85. 	let title = await GM.getValue("github-toc-title", defaults.title);
  86.  
  87. 	const container = document.createElement("div");
  88. 	const useClient = !!document.all;
  89.  
  90. 	// keyboard shortcuts
  91. 	const keyboard = {
  92. 		timer: null,
  93. 		lastKey: null
  94. 	};
  95.  
  96. 	// drag variables
  97. 	const drag = {
  98. 		el: null,
  99. 		elmX: 0,
  100. 		elmY: 0,
  101. 		time: 0,
  102. 		unsel: null
  103. 	};
  104.  
  105. 	const stopPropag = event => {
  106. 		event.preventDefault();
  107. 		event.stopPropagation();
  108. 	};
  109.  
  110. 	// drag code adapted from http://jsfiddle.net/tovic/Xcb8d/light/
  111. 	function dragInit(event) {
  112. 		if (!container.classList.contains("collapsed")) {
  113. 			const x = useClient ? window.event.clientX : event.pageX;
  114. 			const y = useClient ? window.event.clientY : event.pageY;
  115. 			drag.el = container;
  116. 			drag.elmX = x - drag.el.offsetLeft;
  117. 			drag.elmY = y - drag.el.offsetTop;
  118. 			selectionToggle(true);
  119. 		} else {
  120. 			drag.el = null;
  121. 		}
  122. 		drag.time = new Date().getTime() + 500;
  123. 	}
  124.  
  125. 	function dragMove(event) {
  126. 		if (drag.el !== null) {
  127. 			const x = useClient ? window.event.clientX : event.pageX;
  128. 			const y = useClient ? window.event.clientY : event.pageY;
  129. 			drag.el.style.left = (x - drag.elmX) + "px";
  130. 			drag.el.style.top = (y - drag.elmY) + "px";
  131. 			drag.el.style.right = "auto";
  132. 		}
  133. 	}
  134.  
  135. 	function dragStop() {
  136. 		if (drag.el !== null) {
  137. 			dragSave();
  138. 			selectionToggle();
  139. 		}
  140. 		drag.el = null;
  141. 	}
  142.  
  143. 	async function dragSave(restore) {
  144. 		let adjLeft = null;
  145. 		let top = null;
  146. 		let val = null;
  147. 		if (restore) {
  148. 			// position restore (reset) popup to default position
  149. 			setPosition(defaults.left, defaults.top, defaults.right);
  150. 		} else {
  151. 			// Adjust saved left position to be measured from the center of the window
  152. 			// See issue #102
  153. 			const winHalf = window.innerWidth / 2;
  154. 			const left = winHalf - parseInt(container.style.left, 10);
  155. 			adjLeft = left * (left > winHalf ? 1 : -1);
  156. 			top = parseInt(container.style.top, 10);
  157. 			val = [adjLeft, top];
  158. 		}
  159. 		drag.elmX = adjLeft;
  160. 		drag.elmY = top;
  161. 		await GM.setValue("github-toc-location", val);
  162. 	}
  163.  
  164. 	function resize(_, left = drag.elmX, top = drag.elmY) {
  165. 		if (left !== null) {
  166. 			drag.elmX = left;
  167. 			drag.elmY = top;
  168. 			setPosition(((window.innerWidth / 2) + left) + "px", top + "px");
  169. 		}
  170. 	}
  171.  
  172. 	function setPosition(left, top, right = "auto") {
  173. 		container.style.left = left;
  174. 		container.style.right = right;
  175. 		container.style.top = top;
  176. 	}
  177.  
  178. 	// stop text selection while dragging
  179. 	function selectionToggle(disable) {
  180. 		const body = $("body");
  181. 		if (disable) {
  182. 			// save current "unselectable" value
  183. 			drag.unsel = body.getAttribute("unselectable");
  184. 			body.setAttribute("unselectable", "on");
  185. 			body.classList.add("ghus-toc-no-selection");
  186. 			on(body, "onselectstart", stopPropag);
  187. 		} else {
  188. 			if (drag.unsel) {
  189. 				body.setAttribute("unselectable", drag.unsel);
  190. 			}
  191. 			body.classList.remove("ghus-toc-no-selection");
  192. 			body.removeEventListener("onselectstart", stopPropag);
  193. 		}
  194. 		removeSelection();
  195. 	}
  196.  
  197. 	function removeSelection() {
  198. 		// remove text selection - http://stackoverflow.com/a/3171348/145346
  199. 		const sel = window.getSelection ? window.getSelection() : document.selection;
  200. 		if (sel) {
  201. 			if (sel.removeAllRanges) {
  202. 				sel.removeAllRanges();
  203. 			} else if (sel.empty) {
  204. 				sel.empty();
  205. 			}
  206. 		}
  207. 	}
  208.  
  209. 	async function tocShow() {
  210. 		container.classList.remove("collapsed");
  211. 		await GM.setValue("github-toc-hidden", false);
  212. 	}
  213.  
  214. 	async function tocHide() {
  215. 		container.classList.add("collapsed");
  216. 		await GM.setValue("github-toc-hidden", true);
  217. 	}
  218.  
  219. 	function tocToggle() {
  220. 		// don't toggle content on long clicks
  221. 		if (drag.time > new Date().getTime()) {
  222. 			if (container.classList.contains("collapsed")) {
  223. 				tocShow();
  224. 			} else {
  225. 				tocHide();
  226. 			}
  227. 		}
  228. 	}
  229. 	// hide TOC entirely, if no rendered markdown detected
  230. 	function tocView(isVisible) {
  231. 		const toc = $(".ghus-toc");
  232. 		if (toc) {
  233. 			toc.classList.toggle("ghus-toc-hidden", !isVisible);
  234. 		}
  235. 	}
  236.  
  237. 	function tocAdd() {
  238. 		if (!tocInit) {
  239. 			return;
  240. 		}
  241. 		if ($("#wiki-content, #readme")) {
  242. 			let indx, header, anchor, txt;
  243. 			let content = "<ul>";
  244. 			const anchors = $$(".markdown-body .anchor");
  245. 			const len = anchors.length;
  246. 			if (len > 1) {
  247. 				for (indx = 0; indx < len; indx++) {
  248. 					anchor = anchors[indx];
  249. 					if (anchor.parentElement) {
  250. 						header = anchor.parentElement;
  251. 						// replace single & double quotes with right angled quotes
  252. 						txt = header.textContent.trim().replace(/'/g, "&#8217;").replace(/"/g, "&#8221;");
  253. 						content += `
  254. 							<li class="ghus-toc-${header.nodeName.toLowerCase()}">
  255. 								<span class="ghus-toc-icon octicon ghd-invert"></span>
  256. 								<a href="${anchor.hash}" title="${txt}">${txt}</a>
  257. 							</li>
  258. 						`;
  259. 					}
  260. 				}
  261. 				$(".boxed-group-inner", container).innerHTML = content + "</ul>";
  262. 				tocView(true);
  263. 				listCollapsible();
  264. 			} else {
  265. 				tocView();
  266. 			}
  267. 		} else {
  268. 			tocView();
  269. 		}
  270. 	}
  271.  
  272. 	function listCollapsible() {
  273. 		let indx, el, next, count, num, group;
  274. 		const els = $$("li", container);
  275. 		const len = els.length;
  276. 		const regex = /\d/;
  277. 		for (indx = 0; indx < len; indx++) {
  278. 			count = 0;
  279. 			group = [];
  280. 			el = els[indx];
  281. 			next = el && el.nextElementSibling;
  282. 			if (next) {
  283. 				num = el.className.match(regex)[0];
  284. 				while (next && !next.classList.contains("ghus-toc-h" + num)) {
  285. 					if (next.className.match(regex)[0] > num) {
  286. 						count++;
  287. 						group[group.length] = next;
  288. 					}
  289. 					next = next.nextElementSibling;
  290. 				}
  291. 				if (count > 0) {
  292. 					el.className += " collapsible collapsible-" + indx;
  293. 					addClass(group, "ghus-toc-childof-" + indx);
  294. 				}
  295. 			}
  296. 		}
  297. 		group = [];
  298. 		on(container, "click", event => {
  299. 			// Allow doc link to work
  300. 			if (event.target.nodeName === "A") {
  301. 				return;
  302. 			}
  303. 			stopPropag(event);
  304. 			// click on icon, then target LI parent
  305. 			let els, name, indx;
  306. 			const el = event.target.parentElement;
  307. 			const collapse = el.classList.contains("collapsed");
  308. 			if (event.target.classList.contains("ghus-toc-icon")) {
  309. 				if (event.shiftKey) {
  310. 					name = el.className.match(/ghus-toc-h\d/);
  311. 					els = name ? $$("." + name, container) : [];
  312. 					indx = els.length;
  313. 					while (indx--) {
  314. 						collapseChildren(els[indx], collapse);
  315. 					}
  316. 				} else {
  317. 					collapseChildren(el, collapse);
  318. 				}
  319. 				removeSelection();
  320. 			}
  321. 		});
  322. 	}
  323.  
  324. 	function collapseChildren(el, collapse) {
  325. 		const name = el && el.className.match(/collapsible-(\d+)/);
  326. 		const children = name ? $$(".ghus-toc-childof-" + name[1], container) : null;
  327. 		if (children) {
  328. 			if (collapse) {
  329. 				el.classList.remove("collapsed");
  330. 				removeClass(children, "ghus-toc-hidden");
  331. 			} else {
  332. 				el.classList.add("collapsed");
  333. 				addClass(children, "ghus-toc-hidden");
  334. 			}
  335. 		}
  336. 	}
  337.  
  338. 	// keyboard shortcuts
  339. 	// GitHub hotkeys are set up to only go to a url, so rolling our own
  340. 	function keyboardCheck(event) {
  341. 		clearTimeout(keyboard.timer);
  342. 		// use "g+t" to toggle the panel; "g+r" to reset the position
  343. 		// keypress may be needed for non-alphanumeric keys
  344. 		const tocToggleKeys = defaults.toggle.split("+");
  345. 		const tocReset = defaults.restore.split("+");
  346. 		const key = String.fromCharCode(event.which).toLowerCase();
  347. 		const panelHidden = container.classList.contains("collapsed");
  348.  
  349. 		// press escape to close the panel
  350. 		if (event.which === 27 && !panelHidden) {
  351. 			tocHide();
  352. 			return;
  353. 		}
  354. 		// prevent opening panel while typing in comments
  355. 		if (/(input|textarea)/i.test(document.activeElement.nodeName)) {
  356. 			return;
  357. 		}
  358. 		// toggle TOC (g+t)
  359. 		if (keyboard.lastKey === tocToggleKeys[0] && key === tocToggleKeys[1]) {
  360. 			if (panelHidden) {
  361. 				tocShow();
  362. 			} else {
  363. 				tocHide();
  364. 			}
  365. 		}
  366. 		// reset TOC window position (g+r)
  367. 		if (keyboard.lastKey === tocReset[0] && key === tocReset[1]) {
  368. 			container.setAttribute("style", "");
  369. 			dragSave(true);
  370. 		}
  371. 		keyboard.lastKey = key;
  372. 		keyboard.timer = setTimeout(() => {
  373. 			keyboard.lastKey = null;
  374. 		}, defaults.delay);
  375. 	}
  376.  
  377. 	async function init() {
  378. 		// there is no ".header" on github.com/contact; and some other pages
  379. 		const header = $([...defaults.headerSelector, defaults.headerWrap].join(","));
  380. 		if (!header || tocInit) {
  381. 			return;
  382. 		}
  383. 		// insert TOC after header
  384. 		const location = await GM.getValue("github-toc-location", null);
  385. 		// restore last position
  386. 		resize(null, ...(location ? location : [null]));
  387.  
  388. 		// TOC saved state
  389. 		const hidden = await GM.getValue("github-toc-hidden", false);
  390. 		container.className = "ghus-toc boxed-group wiki-pages-box readability-sidebar" + (hidden ? " collapsed" : "");
  391. 		container.setAttribute("role", "navigation");
  392. 		container.setAttribute("unselectable", "on");
  393. 		container.setAttribute("index", "0");
  394. 		container.innerHTML = `
  395. 			<h3 class="js-wiki-toggle-collapse wiki-auxiliary-content" data-hotkey="${defaults.toggle.replace(/\+/g, " ")}">
  396. 				<span class="ghus-toc-toggle ghus-toc-icon">
  397. 					<svg class="octicon" height="14" width="14" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 16 12">
  398. 						<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"/>
  399. 					</svg>
  400. 				</span>
  401. 				<span class="ghus-toc-title">${title}</span>
  402. 				<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">
  403. 					<svg class="octicon" xmlns="http://www.w3.org/2000/svg" height="16" width="14" viewBox="0 0 16 14">
  404. 						<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" />
  405. 					</svg>
  406. 				</a>
  407. 			</h3>
  408. 			<div class="boxed-group-inner wiki-auxiliary-content wiki-auxiliary-content-no-bg"></div>
  409. 		`;
  410.  
  411. 		// add container
  412. 		const el = $(defaults.headerSelector.join(","));
  413. 		el.parentElement.insertBefore(container, el);
  414.  
  415. 		// make draggable
  416. 		on($("h3", container), "mousedown", dragInit);
  417. 		on(document, "mousemove", dragMove);
  418. 		on(document, "mouseup", dragStop);
  419. 		// toggle TOC
  420. 		on($(".ghus-toc-icon", container), "mouseup", tocToggle);
  421. 		// prevent container content selection
  422. 		on(container, "onselectstart", stopPropag);
  423. 		// keyboard shortcuts
  424. 		on(document, "keydown", keyboardCheck);
  425. 		// keep window relative to middle on resize
  426. 		on(window, "resize", resize);
  427.  
  428. 		tocInit = true;
  429. 		tocAdd();
  430. 	}
  431.  
  432. 	function $(str, el) {
  433. 		return (el || document).querySelector(str);
  434. 	}
  435.  
  436. 	function $$(str, el) {
  437. 		return Array.from((el || document).querySelectorAll(str));
  438. 	}
  439.  
  440. 	function on(el, name, handler) {
  441. 		el.addEventListener(name, handler);
  442. 	}
  443.  
  444. 	function addClass(els, name) {
  445. 		let indx;
  446. 		const len = els.length;
  447. 		for (indx = 0; indx < len; indx++) {
  448. 			els[indx].classList.add(name);
  449. 		}
  450. 	}
  451.  
  452. 	function removeClass(els, name) {
  453. 		let indx;
  454. 		const len = els.length;
  455. 		for (indx = 0; indx < len; indx++) {
  456. 			els[indx].classList.remove(name);
  457. 		}
  458. 	}
  459.  
  460. 	// Add GM options
  461. 	GM.registerMenuCommand("Set Table of Contents Title", async () => {
  462. 		title = prompt("Table of Content Title:", title);
  463. 		await GM.setValue("github-toc-title", title);
  464. 		$("h3 .ghus-toc-title", container).textContent = title;
  465. 	});
  466.  
  467. 	on(document, "ghmo:container", tocAdd);
  468. 	on(document, "ghmo:preview", tocAdd);
  469. 	init();
  470.  
  471. })();