☰

SE Preview on hover

Shows preview of the linked questions/answers on hover

当前为 2017-02-17 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name           SE Preview on hover
  3. // @description    Shows preview of the linked questions/answers on hover
  4. // @version        0.2.1
  5. // @author         wOxxOm
  6. // @namespace      wOxxOm.scripts
  7. // @license        MIT License
  8. // @match          *://*.stackoverflow.com/*
  9. // @match          *://*.superuser.com/*
  10. // @match          *://*.serverfault.com/*
  11. // @match          *://*.askubuntu.com/*
  12. // @match          *://*.stackapps.com/*
  13. // @match          *://*.mathoverflow.net/*
  14. // @match          *://*.stackexchange.com/*
  15. // @require        https://gf.qytechs.cn/scripts/12228/code/setMutationHandler.js
  16. // @require        https://cdnjs.cloudflare.com/ajax/libs/lz-string/1.4.4/lz-string.min.js
  17. // @grant          GM_addStyle
  18. // @grant          GM_xmlhttpRequest
  19. // @connect        stackoverflow.com
  20. // @connect        superuser.com
  21. // @connect        serverfault.com
  22. // @connect        askubuntu.com
  23. // @connect        stackapps.com
  24. // @connect        mathoverflow.net
  25. // @connect        stackexchange.com
  26. // @connect        cdn.sstatic.net
  27. // @run-at         document-end
  28. // @noframes
  29. // ==/UserScript==
  30.  
  31. /* jshint lastsemic:true, multistr:true, laxbreak:true, -W030, -W041, -W084 */
  32.  
  33. const PREVIEW_DELAY = 200;
  34. const CACHE_DURATION = 1 * 60 * 1000; // 1 minute for the recently active posts, scales up logarithmically
  35. const COLORS = {
  36. 	question: {
  37. 		backRGB: '80, 133, 195',
  38. 		fore: '#265184',
  39. 	},
  40. 	answer: {
  41. 		backRGB: '112, 195, 80',
  42. 		fore: '#3f7722',
  43. 		foreInv: 'white',
  44. 	},
  45. 	deleted: {
  46. 		backRGB: '181, 103, 103',
  47. 		fore: 'rgb(181, 103, 103)',
  48. 		foreInv: 'white',
  49. 	},
  50. };
  51.  
  52. let xhr;
  53. let preview = {
  54. 	frame: null,
  55. 	link: null,
  56. 	hover: {x:0, y:0},
  57. 	timer: 0,
  58. 	cacheCSS: {},
  59. 	stylesOverride: '',
  60. };
  61.  
  62. const rxPreviewable = getURLregexForMatchedSites();
  63. const thisPageUrls = getPageBaseUrls(location.href);
  64.  
  65. initStyles();
  66. initPolyfills();
  67. setMutationHandler('a', onLinkAdded, {processExisting: true});
  68. setTimeout(cleanupCache, 10000);
  69.  
  70. /**************************************************************/
  71.  
  72. function onLinkAdded(links) {
  73. 	for (let i = 0, link; (link = links[i++]); ) {
  74. 		if (isLinkPreviewable(link)) {
  75. 			link.removeAttribute('title');
  76. 			$on('mouseover', link, onLinkHovered);
  77. 		}
  78. 	}
  79. }
  80.  
  81. function onLinkHovered(e) {
  82. 	if (e.ctrlKey || e.altKey || e.shiftKey || e.metaKey)
  83. 		return;
  84. 	preview.link = this;
  85. 	$on('mousemove', this, onLinkMouseMove);
  86. 	$on('mouseout', this, abortPreview);
  87. 	$on('mousedown', this, abortPreview);
  88. 	restartPreviewTimer(this);
  89. }
  90.  
  91. function onLinkMouseMove(e) {
  92. 	let stoppedMoving = Math.abs(preview.hover.x - e.clientX) < 2 &&
  93. 				  Math.abs(preview.hover.y - e.clientY) < 2;
  94. 	if (!stoppedMoving)
  95. 		return;
  96. 	preview.hover.x = e.clientX;
  97. 	preview.hover.y = e.clientY;
  98. 	restartPreviewTimer(this);
  99. }
  100.  
  101. function restartPreviewTimer(link) {
  102. 	clearTimeout(preview.timer);
  103. 	preview.timer = setTimeout(() => {
  104. 		preview.timer = 0;
  105. 		$off('mousemove', link, onLinkMouseMove);
  106. 		if (link.matches(':hover'))
  107. 			downloadPreview(link.href);
  108. 	}, PREVIEW_DELAY);
  109. }
  110.  
  111. function abortPreview(e) {
  112. 	releaseLinkListeners(this);
  113. 	preview.timer = setTimeout(link => {
  114. 		if (link == preview.link && preview.frame && !preview.frame.matches(':hover')) {
  115. 			releaseLinkListeners(link);
  116. 			preview.frame.contentWindow.postMessage('SEpreviewHidden', '*');
  117. 			fadeOut(preview.frame);
  118. 		}
  119. 	}, PREVIEW_DELAY * 3, this);
  120. 	if (xhr)
  121. 		xhr.abort();
  122. }
  123.  
  124. function releaseLinkListeners(link) {
  125. 	$off('mousemove', link, onLinkMouseMove);
  126. 	$off('mouseout', link, abortPreview);
  127. 	$off('mousedown', link, abortPreview);
  128. 	clearTimeout(preview.timer);
  129. }
  130.  
  131. function fadeOut(element, transition) {
  132. 	if (transition) {
  133. 		element.style.transition = typeof transition == 'number' ? `opacity ${transition}s ease-in-out` : transition;
  134. 		return setTimeout(fadeOut, 0, element);
  135. 	}
  136. 	element.style.opacity = 0;
  137. 	$on('transitionend', element, function remove() {
  138. 		$off('transitionend', element, remove);
  139. 		if (+element.style.opacity === 0)
  140. 			element.style.display = 'none';
  141. 	});
  142. }
  143.  
  144. function downloadPreview(url) {
  145. 	let cached = readCache(url);
  146. 	if (cached)
  147. 		showPreview(cached);
  148. 	else {
  149. 		xhr = GM_xmlhttpRequest({
  150. 			method: 'GET',
  151. 			url: httpsUrl(url),
  152. 			onload: r => {
  153. 				let html = r.responseText;
  154. 				let lastActivity = showPreview({finalUrl: r.finalUrl, html});
  155. 				let inactiveDays = Math.max(0, (Date.now() - lastActivity) / (24 * 3600 * 1000));
  156. 				let cacheDuration = CACHE_DURATION * Math.pow(Math.log(inactiveDays + 1) + 1, 2);
  157. 				writeCache({url, finalUrl: r.finalUrl, html, cacheDuration});
  158. 			},
  159. 		});
  160. 	}
  161. }
  162.  
  163. function showPreview({finalUrl, html, doc}) {
  164. 	doc = doc || new DOMParser().parseFromString(html, 'text/html');
  165. 	if (!doc || !doc.head) {
  166. 		error('no HEAD in the document received for', finalUrl);
  167. 		return;
  168. 	}
  169.  
  170. 	if (!$('base', doc))
  171. 		doc.head.insertAdjacentHTML('afterbegin', `<base href="${finalUrl}">`);
  172.  
  173. 	const answerIdMatch = finalUrl.match(/questions\/\d+\/[^\/]+\/(\d+)/);
  174. 	const isQuestion = !answerIdMatch;
  175. 	const postId = answerIdMatch ? '#answer-' + answerIdMatch[1] : '#question';
  176. 	const post = $(postId + ' .post-text', doc);
  177. 	if (!post)
  178. 		return error('No parsable post found', doc);
  179. 	const isDeleted = post.closest('.deleted-answer');
  180. 	const title = $('meta[property="og:title"]', doc).content;
  181. 	const status = isQuestion && !$('.question-status', post) && $('.question-status', doc);
  182. 	const comments = $(`${postId} .comments`, doc);
  183. 	const commentsHidden = +$('tbody', comments).dataset.remainingCommentsCount;
  184. 	const commentsShowLink = commentsHidden && $(`${postId} .js-show-link.comments-link`, doc);
  185. 	const finalUrlOfQuestion = getCacheableUrl(finalUrl);
  186.  
  187. 	const lastActivity = +doc.body.getAttribute('SEpreview-lastActivity')
  188. 		|| tryCatch(() => new Date($('.lastactivity-link', doc).title).getTime())
  189. 		|| Date.now();
  190. 	if (lastActivity)
  191. 		doc.body.setAttribute('SEpreview-lastActivity', lastActivity);
  192.  
  193. 	$$remove('script', doc);
  194.  
  195. 	// underline previewable links
  196. 	for (let link of $$('a:not(.SEpreviewable)', doc)) {
  197. 		if (rxPreviewable.test(link.href)) {
  198. 			link.removeAttribute('title');
  199. 			link.classList.add('SEpreviewable');
  200. 		}
  201. 	}
  202.  
  203. 	if (!preview.frame) {
  204. 		preview.frame = document.createElement('iframe');
  205. 		preview.frame.id = 'SEpreview';
  206.     	document.body.appendChild(preview.frame);
  207. 	}
  208.  
  209. 	let pvDoc, pvWin;
  210. 	preview.frame.setAttribute('SEpreviewType', isDeleted ? 'deleted' : isQuestion ? 'question' : 'answer');
  211. 	onFrameReady(preview.frame).then(
  212. 		() => {
  213. 			pvDoc = preview.frame.contentDocument;
  214. 			pvWin = preview.frame.contentWindow;
  215. 			initPolyfills(pvWin);
  216. 		})
  217. 		.then(addStyles)
  218. 		.then(render)
  219. 		.then(show);
  220. 	return lastActivity;
  221.  
  222. 	function addStyles() {
  223. 		const pvDoc = preview.frame.contentDocument;
  224. 		const SEpreviewStyles = $replaceOrCreate({
  225.     		id: 'SEpreviewStyles',
  226. 			tag: 'style', parent: pvDoc.head, className: 'SEpreviewReuse',
  227. 			innerHTML: preview.stylesOverride,
  228. 		});
  229.  
  230. 		$replaceOrCreate($$('style, link[rel="stylesheet"]', doc).map(e =>
  231. 			e.localName == 'style' ? {
  232. 				id: 'SEpreview' + e.innerHTML.replace(/\W+/g, '').length,
  233. 				tag: 'style', before: SEpreviewStyles, className: 'SEpreviewReuse',
  234. 				innerHTML: e.innerHTML,
  235. 			} : {
  236. 				id: e.href.replace(/\W+/g, ''),
  237. 				tag: 'link', before: SEpreviewStyles, className: 'SEpreviewReuse',
  238. 				href: e.href, rel: 'stylesheet',
  239. 			})
  240. 		);
  241.  
  242. 		return onStyleSheetsReady($$('link[rel="stylesheet"]', pvDoc));
  243. 	}
  244.  
  245. 	function render() {
  246. 		pvDoc.body.setAttribute('SEpreviewType', preview.frame.getAttribute('SEpreviewType'));
  247.  
  248. 		$replaceOrCreate([{
  249. 		// title
  250. 			id: 'SEpreviewTitle', tag: 'a',
  251. 			parent: pvDoc.body, className: 'SEpreviewable',
  252.             href: finalUrlOfQuestion,
  253. 			textContent: title,
  254. 		}, {
  255. 		// vote count, date, views#
  256. 			id: 'SEpreviewMeta',
  257. 			parent: pvDoc.body,
  258. 			innerHTML: [
  259. 				renderVotes(post.closest('table')).replace(/(\S+) (\S+)/, '<b>$1</b> $2, '),
  260. 				isQuestion
  261. 					? $$('#qinfo tr', doc)
  262. 						.map(row => $$('.label-key', row).map($text).join(' '))
  263. 						.join(', ').replace(/^((.+?) (.+?), .+?), .+? \3$/, '$1')
  264. 					: [...$$('.user-action-time', post.closest('.answer'))]
  265. 						.reverse().map($text).join(', ')
  266. 			].join('')
  267. 		}, {
  268. 		// content wrapper
  269. 			id: 'SEpreviewBody',
  270. 			parent: pvDoc.body,
  271. 			className: isDeleted ? 'deleted-answer' : '',
  272. 			children: [post.parentElement, comments, commentsShowLink, status],
  273. 		}]);
  274.  
  275. 		renderCode();
  276.  
  277. 		// render bottom shelf
  278. 		const answers = $$('.answer', doc);
  279. 		if (answers.length > (isQuestion ? 0 : 1)) {
  280. 			$replaceOrCreate({
  281. 				id: 'SEpreviewAnswers',
  282. 				parent: pvDoc.body,
  283. 				innerHTML: 'Answers:&nbsp;' + answers.map(renderShelfAnswer).join(''),
  284. 			});
  285. 		} else
  286. 			$$remove('#SEpreviewAnswers', pvDoc);
  287.  
  288. 		// cleanup leftovers from previously displayed post
  289. 		$$('head style, head link, body script', pvDoc).forEach(e => {
  290. 			if (e.classList.contains('SEpreviewReuse'))
  291. 				e.classList.remove('SEpreviewReuse');
  292. 			else
  293. 				e.remove();
  294. 		});
  295. 	}
  296.  
  297. 	function renderCode() {
  298. 		const codeBlocks = $$('pre code', pvDoc);
  299. 		if (codeBlocks.length) {
  300. 			codeBlocks.forEach(e => e.parentElement.classList.add('prettyprint'));
  301. 			if (!pvWin.StackExchange) {
  302. 				pvWin.StackExchange = {};
  303. 				let script = $scriptIn(pvDoc.head);
  304. 				script.text = 'StackExchange = {}';
  305. 				script = $scriptIn(pvDoc.head);
  306. 				script.src = 'https://cdn.sstatic.net/Js/prettify-full.en.js';
  307. 				script.setAttribute('onload', 'prettyPrint()');
  308. 			} else
  309. 				$scriptIn(pvDoc.body).text = 'prettyPrint()';
  310. 		}
  311. 	}
  312.  
  313. 	function renderShelfAnswer(e, index) {
  314. 		const shortUrl = $('.short-link', e).href.replace(/(\d+)\/\d+/, '$1');
  315. 		const extraClasses = (e.matches(postId) ? ' SEpreviewed' : '') +
  316. 		      (e.matches('.deleted-answer') ? ' deleted-answer' : '');
  317. 		const author = $('.post-signature:last-child', e);
  318. 		return `<a href="${shortUrl}"
  319. 		    SEpreviewFullUrl="${finalUrlOfQuestion + '/' + shortUrl.match(/\/(\d+)/)[1]}"
  320. 			title="${$text('.user-details a', author) +
  321. 			' (rep '+$text('.reputation-score', author) + ')\n' +
  322. 		             $text('.user-action-time', author) +
  323. 		             renderVotes(author)}"
  324. 			class="SEpreviewable${extraClasses}"
  325. 		>${index + 1}</a>`;
  326. 	}
  327.  
  328. 	function renderVotes(post) {
  329. 		return $text('.vote-count-post', post)
  330. 			.replace(/-?\d+/, s => s == '0' ? '' : '\n' + s + ' vote' + (+s > 1 ? 's' : ''));
  331. 	}
  332.  
  333. 	function show() {
  334. 		pvDoc.onmouseover = retainMainScrollPos;
  335. 		pvDoc.onclick = interceptLinks;
  336. 		pvWin.onmessage = e => {
  337. 			if (e.data == 'SEpreviewHidden') {
  338. 				pvWin.onmessage = null;
  339. 				pvDoc.onmouseover = null;
  340. 				pvDoc.onclick = null;
  341. 			}
  342. 		};
  343.  
  344. 		$('#SEpreviewBody', pvDoc).scrollTop = 0;
  345. 		preview.frame.style.opacity = 1;
  346. 		preview.frame.style.display = '';
  347. 	}
  348.  
  349. 	function retainMainScrollPos(e) {
  350. 		let scrollPos = {x:scrollX, y:scrollY};
  351. 		$on('scroll', preventScroll);
  352. 		$on('mouseover', releaseScrollLock);
  353.  
  354. 		function preventScroll(e) {
  355. 			scrollTo(scrollPos.x, scrollPos.y);
  356. 		}
  357.  
  358. 		function releaseScrollLock(e) {
  359. 			$off('mouseout', releaseScrollLock);
  360. 			$off('scroll', preventScroll);
  361. 		}
  362. 	}
  363.  
  364. 	function interceptLinks(e) {
  365. 		const link = e.target.closest('a');
  366. 		if (!link)
  367. 			return;
  368. 		if (link.matches('.js-show-link.comments-link')) {
  369. 			fadeOut(link, 0.5);
  370. 			loadComments();
  371. 		}
  372. 		else if (e.button || e.ctrlKey || e.altKey || e.shiftKey || e.metaKey || !link.matches('.SEpreviewable'))
  373. 			return (link.target = '_blank');
  374. 		else if (link.matches('#SEpreviewAnswers a, a#SEpreviewTitle'))
  375. 			showPreview({
  376. 				finalUrl: link.getAttribute('SEpreviewFullUrl') || link.href,
  377. 				doc
  378. 			});
  379. 		else
  380. 			downloadPreview(link.getAttribute('SEpreviewFullUrl') || link.href);
  381. 		e.preventDefault();
  382. 	}
  383.  
  384. 	function loadComments() {
  385. 		GM_xmlhttpRequest({
  386. 			method: 'GET',
  387. 			url: new URL(finalUrl).origin + '/posts/' + comments.id.match(/\d+/)[0] + '/comments',
  388. 			onload: r => {
  389. 				let tbody = $(`#${comments.id} tbody`, pvDoc);
  390. 				let oldIds = new Set([...tbody.rows].map(e => e.id));
  391. 				tbody.innerHTML = r.responseText;
  392. 				for (let tr of tbody.rows)
  393. 					if (!oldIds.has(tr.id))
  394. 						tr.classList.add('new-comment-highlight');
  395. 			},
  396. 		});
  397. 	}
  398. }
  399.  
  400. function getCacheableUrl(url) {
  401. 	// strips querys and hashes and anything after the main part https://site/questions/####/title/
  402. 	return url
  403. 		.replace(/(\/q(?:uestions)?\/\d+\/[^\/]+).*/, '$1')
  404. 		.replace(/(\/a(?:nswers)?\/\d+).*/, '$1')
  405. 		.replace(/[?#].*$/, '');
  406. }
  407.  
  408. function readCache(url) {
  409. 	keyUrl = getCacheableUrl(url);
  410. 	const meta = (localStorage[keyUrl] || '').split('\t');
  411. 	const expired = +meta[0] < Date.now();
  412. 	const finalUrl = meta[1] || url;
  413. 	const keyFinalUrl = meta[1] ? getCacheableUrl(finalUrl) : keyUrl;
  414. 	return !expired && {
  415. 		finalUrl,
  416. 		html: LZString.decompressFromUTF16(localStorage[keyFinalUrl + '\thtml']),
  417. 	};
  418. }
  419.  
  420. function writeCache({url, finalUrl, html, cacheDuration = CACHE_DURATION, cleanupRetry}) {
  421. 	// keyUrl=expires
  422. 	// redirected keyUrl=expires+finalUrl, and an additional entry keyFinalUrl=expires is created
  423. 	// keyFinalUrl\thtml=html
  424. 	cacheDuration = Math.max(CACHE_DURATION, Math.min(0xDEADBEEF, Math.floor(cacheDuration)));
  425. 	finalUrl = finalUrl.replace(/[?#].*/, '');
  426. 	const keyUrl = getCacheableUrl(url);
  427. 	const keyFinalUrl = getCacheableUrl(finalUrl);
  428. 	const expires = Date.now() + cacheDuration;
  429. 	if (!tryCatch(() => localStorage[keyFinalUrl + '\thtml'] = LZString.compressToUTF16(html))) {
  430. 		if (cleanupRetry)
  431. 			return error('localStorage write error');
  432. 		cleanupCache({aggressive: true});
  433. 		setIimeout(writeCache, 0, {url, finalUrl, html, cacheDuration, cleanupRetry: true});
  434. 	}
  435. 	localStorage[keyFinalUrl] = expires;
  436. 	if (keyUrl != keyFinalUrl)
  437. 		localStorage[keyUrl] = expires + '\t' + finalUrl;
  438. 	setTimeout(() => {
  439. 		[keyUrl, keyFinalUrl, keyFinalUrl + '\thtml'].forEach(e => localStorage.removeItem(e));
  440. 	}, cacheDuration + 1000);
  441. }
  442.  
  443. function cleanupCache({aggressive = false} = {}) {
  444. 	Object.keys(localStorage).forEach(k => {
  445. 		if (k.match(/^https?:\/\/[^\t]+$/)) {
  446. 			let meta = (localStorage[k] || '').split('\t');
  447. 			if (+meta[0] > Date.now() && !aggressive)
  448. 				return;
  449. 			if (meta[1])
  450. 				localStorage.removeItem(meta[1]);
  451. 			localStorage.removeItem(`${meta[1] || k}\thtml`);
  452. 			localStorage.removeItem(k);
  453. 		}
  454. 	});
  455. }
  456.  
  457. function onFrameReady(frame) {
  458. 	if (frame.contentDocument.readyState == 'complete')
  459. 		return Promise.resolve();
  460. 	else
  461. 		return new Promise(resolve => {
  462. 			$on('load', frame, function onLoad() {
  463. 				$off('load', frame, onLoad);
  464. 				resolve();
  465. 			});
  466. 		});
  467. }
  468.  
  469. function onStyleSheetsReady(linkElements) {
  470. 	return new Promise(function retry(resolve) {
  471. 		if (linkElements.every(e => e.sheet && e.sheet.href == e.href))
  472. 			resolve();
  473. 		else
  474. 			setTimeout(retry, 0, resolve);
  475. 	});
  476. }
  477.  
  478. function getURLregexForMatchedSites() {
  479. 	return new RegExp('https?://(\\w*\\.)*(' + GM_info.script.matches.map(m =>
  480. 		m.match(/^.*?\/\/\W*(\w.*?)\//)[1].replace(/\./g, '\\.')
  481. 	).join('|') + ')/(questions|q|a)/\\d+');
  482. }
  483.  
  484. function isLinkPreviewable(link) {
  485. 	const inPreview = link.ownerDocument != document;
  486. 	if (!rxPreviewable.test(link.href) || link.matches('.short-link'))
  487. 		return false;
  488. 	const pageUrls = inPreview ? getPageBaseUrls(preview.link.href) : thisPageUrls;
  489. 	const url = httpsUrl(link.href);
  490. 	return !url.startsWith(pageUrls.base) &&
  491. 		   !url.startsWith(pageUrls.short);
  492. }
  493.  
  494. function getPageBaseUrls(url) {
  495. 	const base = httpsUrl((url.match(rxPreviewable) || [])[0]);
  496. 	return base ? {
  497. 		base,
  498. 		short: base.replace('/questions/', '/q/'),
  499. 	} : {};
  500. }
  501.  
  502. function httpsUrl(url) {
  503. 	return (url || '').replace(/^http:/, 'https:');
  504. }
  505.  
  506. function $(selector, node = document) {
  507. 	return node.querySelector(selector);
  508. }
  509.  
  510. function $$(selector, node = document) {
  511. 	return node.querySelectorAll(selector);
  512. }
  513.  
  514. function $text(selector, node = document) {
  515. 	const e = typeof selector == 'string' ? node.querySelector(selector) : selector;
  516. 	return e ? e.textContent.trim() : '';
  517. }
  518.  
  519. function $$remove(selector, node = document) {
  520. 	node.querySelectorAll(selector).forEach(e => e.remove());
  521. }
  522.  
  523. function $appendChildren(newParent, elements) {
  524. 	const doc = newParent.ownerDocument;
  525. 	for (let e of elements)
  526. 		if (e)
  527. 		   newParent.appendChild(e.ownerDocument == doc ? e : doc.importNode(e, true));
  528. }
  529.  
  530. function $replaceOrCreate(options) {
  531. 	if (options.length && typeof options[0] == 'object')
  532. 		return [].map.call(options, $replaceOrCreate);
  533.     const doc = (options.parent || options.before).ownerDocument;
  534. 	const el = doc.getElementById(options.id) || doc.createElement(options.tag || 'div');
  535. 	for (let key of Object.keys(options)) {
  536. 		switch (key) {
  537. 			case 'tag':
  538. 			case 'parent':
  539. 			case 'before':
  540. 				break;
  541. 			case 'children':
  542. 				if (el.children.length)
  543. 					el.innerHTML = '';
  544. 				$appendChildren(el, options[key]);
  545. 				break;
  546. 			default:
  547. 				const value = options[key];
  548. 				if (key in el && el[key] != value)
  549. 					el[key] = value;
  550. 		}
  551. 	}
  552. 	if (!el.parentElement)
  553.     	(options.parent || options.before.parentElement).insertBefore(el, options.before);
  554. 	return el;
  555. }
  556.  
  557. function $scriptIn(element) {
  558. 	return element.appendChild(element.ownerDocument.createElement('script'));
  559. }
  560.  
  561. function $on(eventName, ...args) {
  562. // eventName, selector, node, callback, options
  563. // eventName, selector, callback, options
  564. // eventName, node, callback, options
  565. // eventName, callback, options
  566. 	const selector = typeof args[0] == 'string' ? args[0] : null;
  567. 	const node = args[0] instanceof Node ? args[0] : args[1] instanceof Node ? args[1] : document;
  568. 	const callback = args[typeof args[0] == 'function' ? 0 : typeof args[1] == 'function' ? 1 : 2];
  569. 	const options = args[args.length - 1] != callback ? args[args.length - 1] : undefined;
  570. 	const method = this == 'removeEventListener' ? this : 'addEventListener';
  571. 	(selector ? node.querySelector(selector) : node)[method](eventName, callback, options);
  572. }
  573.  
  574. function $off(eventName, ...args) {
  575. 	$on.apply('removeEventListener', arguments);
  576. }
  577.  
  578. function log(...args) {
  579. 	console.log(GM_info.script.name, ...args);
  580. }
  581.  
  582. function error(...args) {
  583. 	console.error(GM_info.script.name, ...args);
  584. }
  585.  
  586. function tryCatch(fn) {
  587. 	try { return fn() }
  588. 	catch(e) {}
  589. }
  590.  
  591. function initPolyfills(context = window) {
  592. 	for (let method of ['forEach', 'filter', 'map', 'every', context.Symbol.iterator])
  593. 		if (!context.NodeList.prototype[method])
  594. 			context.NodeList.prototype[method] = context.Array.prototype[method];
  595. }
  596.  
  597. function initStyles() {
  598. 	GM_addStyle(`
  599. 		#SEpreview {
  600. 			all: unset;
  601. 			box-sizing: content-box;
  602. 			width: 720px; /* 660px + 30px + 30px */
  603. 			height: 33%;
  604. 			min-height: 200px;
  605. 			position: fixed;
  606. 			opacity: 0;
  607. 			transition: opacity .5s cubic-bezier(.88,.02,.92,.66);
  608. 			right: 0;
  609. 			bottom: 0;
  610. 			padding: 0;
  611. 			margin: 0;
  612. 			background: white;
  613. 			box-shadow: 0 0 100px rgba(0,0,0,0.5);
  614. 			z-index: 999999;
  615. 			border: 8px solid rgb(${COLORS.question.backRGB});
  616. 		}
  617. 		#SEpreview[SEpreviewType="answer"] {
  618. 			border-color: rgb(${COLORS.answer.backRGB});
  619. 		}
  620. 		#SEpreview[SEpreviewType="deleted"] {
  621. 			border-color: rgba(${COLORS.deleted.backRGB}, 0.65);
  622. 		}
  623. 	`);
  624.  
  625. 	preview.stylesOverride = `
  626. 		body, html {
  627. 			min-width: unset!important;
  628. 			box-shadow: none!important;
  629. 			padding: 0!important;
  630. 			margin: 0!important;
  631. 		}
  632. 		html, body {
  633. 			background: unset!important;;
  634. 		}
  635. 		body {
  636. 			display: flex;
  637. 			flex-direction: column;
  638. 			height: 100vh;
  639. 		}
  640. 		a.SEpreviewable:not(#SEpreviewTitle) {
  641. 			text-decoration: underline !important;
  642. 		}
  643. 		#SEpreviewTitle {
  644. 			all: unset;
  645. 			display: block;
  646. 			padding: 20px 30px;
  647. 			font-weight: bold;
  648. 			font-size: 18px;
  649. 			line-height: 1.2;
  650. 			background-color: rgba(${COLORS.question.backRGB}, 0.37);
  651. 			color: ${COLORS.question.fore};
  652. 			cursor: pointer;
  653. 		}
  654. 		#SEpreviewTitle:hover {
  655. 			text-decoration: underline;
  656. 		}
  657. 		#SEpreviewMeta {
  658. 			position: absolute;
  659. 			top: .5ex;
  660. 			left: 30px;
  661. 			opacity: 0.5;
  662. 		}
  663. 		#SEpreviewTitle:hover + #SEpreviewMeta {
  664. 			opacity: 1.0;
  665. 		}
  666.  
  667. 		#SEpreviewBody {
  668. 			padding: 30px!important;
  669. 			overflow: auto;
  670. 			flex-grow: 2;
  671. 		}
  672. 		#SEpreviewBody .post-menu {
  673. 			display: none!important;
  674. 		}
  675. 		#SEpreviewBody > .question-status {
  676. 			margin: -10px -30px -30px;
  677. 			padding-left: 30px;
  678. 		}
  679. 		#SEpreviewBody > .question-status h2 {
  680. 			font-weight: normal;
  681. 		}
  682. 		#SEpreviewBody > a + .question-status {
  683. 			margin-top: 20px;
  684. 		}
  685.  
  686. 		#SEpreviewBody::-webkit-scrollbar { background-color: rgba(${COLORS.question.backRGB}, 0.1); }
  687. 		#SEpreviewBody::-webkit-scrollbar-thumb { background-color: rgba(${COLORS.question.backRGB}, 0.2); }
  688. 		#SEpreviewBody::-webkit-scrollbar-thumb:hover { background-color: rgba(${COLORS.question.backRGB}, 0.3); }
  689. 		#SEpreviewBody::-webkit-scrollbar-thumb:active { background-color: rgba(${COLORS.question.backRGB}, 0.75); }
  690. /* answer */
  691. 		body[SEpreviewType="answer"] #SEpreviewTitle {
  692. 			background-color: rgba(${COLORS.answer.backRGB}, 0.37);
  693. 			color: ${COLORS.answer.fore};
  694. 		}
  695. 		body[SEpreviewType="answer"] #SEpreviewBody::-webkit-scrollbar { background-color: rgba(${COLORS.answer.backRGB}, 0.1); }
  696. 		body[SEpreviewType="answer"] #SEpreviewBody::-webkit-scrollbar-thumb { background-color: rgba(${COLORS.answer.backRGB}, 0.2); }
  697. 		body[SEpreviewType="answer"] #SEpreviewBody::-webkit-scrollbar-thumb:hover { background-color: rgba(${COLORS.answer.backRGB}, 0.3); }
  698. 		body[SEpreviewType="answer"] #SEpreviewBody::-webkit-scrollbar-thumb:active { background-color: rgba(${COLORS.answer.backRGB}, 0.75); }
  699. /* deleted */
  700. 		body[SEpreviewType="deleted"] #SEpreviewTitle {
  701. 			background-color: rgba(${COLORS.deleted.backRGB}, 0.37);
  702. 			color: ${COLORS.deleted.fore};
  703. 		}
  704. 		body[SEpreviewType="deleted"] #SEpreviewBody::-webkit-scrollbar { background-color: rgba(${COLORS.deleted.backRGB}, 0.1); }
  705. 		body[SEpreviewType="deleted"] #SEpreviewBody::-webkit-scrollbar-thumb { background-color: rgba(${COLORS.deleted.backRGB}, 0.2); }
  706. 		body[SEpreviewType="deleted"] #SEpreviewBody::-webkit-scrollbar-thumb:hover { background-color: rgba(${COLORS.deleted.backRGB}, 0.3); }
  707. 		body[SEpreviewType="deleted"] #SEpreviewBody::-webkit-scrollbar-thumb:active { background-color: rgba(${COLORS.deleted.backRGB}, 0.75); }
  708. /********/
  709. 		#SEpreviewAnswers {
  710. 			all: unset;
  711. 			display: block;
  712. 			padding: 10px 30px;
  713. 			font-weight: bold;
  714. 			font-size: 20px;
  715. 			line-height: 1.3;
  716. 			border-top: 4px solid rgba(${COLORS.answer.backRGB}, 0.37);
  717. 			background-color: rgba(${COLORS.answer.backRGB}, 0.37);
  718. 			color: ${COLORS.answer.fore};
  719. 			word-break: break-word;
  720. 		}
  721. 		#SEpreviewAnswers a {
  722. 			color: ${COLORS.answer.fore};
  723. 			padding: .25ex .75ex;
  724. 			text-decoration: none;
  725. 		}
  726. 		#SEpreviewAnswers a.deleted-answer {
  727. 			color: ${COLORS.deleted.fore};
  728. 			background: transparent;
  729. 		}
  730. 		#SEpreviewAnswers a:hover:not(.SEpreviewed) {
  731. 			text-decoration: underline;
  732. 		}
  733. 		#SEpreviewAnswers a.SEpreviewed {
  734. 			background-color: ${COLORS.answer.fore};
  735. 			color: ${COLORS.answer.foreInv};
  736. 		}
  737. /* deleted */
  738. 		body[SEpreviewType="deleted"] #SEpreviewAnswers {
  739. 			border-top-color: rgba(${COLORS.deleted.backRGB}, 0.37);
  740. 			background-color: rgba(${COLORS.deleted.backRGB}, 0.37);
  741. 			color: ${COLORS.deleted.fore};
  742. 		}
  743. 		body[SEpreviewType="deleted"] #SEpreviewAnswers a.SEpreviewed {
  744. 			background-color: ${COLORS.deleted.fore};
  745. 			color: ${COLORS.deleted.foreInv};
  746. 		}
  747. /********/
  748. 		.delete-tag,
  749. 		.comment-actions td:last-child {
  750. 			display: none;
  751. 		}
  752. 		.comments .new-comment-highlight {
  753. 			-webkit-animation: highlight 9s cubic-bezier(0,.8,.37,.88);
  754. 			-moz-animation: highlight 9s cubic-bezier(0,.8,.37,.88);
  755. 			animation: highlight 9s cubic-bezier(0,.8,.37,.88);
  756. 		}
  757.  
  758. 		@-webkit-keyframes highlight {
  759. 			from {background-color: #ffcf78}
  760. 			to   {background-color: none}
  761. 		}
  762. 	`;
  763. }

欢迎访问Greasy Fork镜像

土豆服务器，请按需使用

镜像地址随时可能被墙，建议加群获取最新地址

加入Q群

QingJ © 2025

镜像随时可能失效，请加Q群300939539或关注我们的公众号极客氢云获取最新地址