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GitHub Image Preview

A userscript that adds clickable image thumbnails

当前为 2017-04-14 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        GitHub Image Preview
  3. // @version     1.1.5
  4. // @description A userscript that adds clickable image thumbnails
  5. // @license     https://creativecommons.org/licenses/by-sa/4.0/
  6. // @author      Rob Garrison
  7. // @namespace   https://github.com/Mottie
  8. // @include     https://github.com/*
  9. // @run-at      document-idle
  10. // @grant       GM_addStyle
  11. // @grant       GM_getValue
  12. // @grant       GM_setValue
  13. // @grant       GM_xmlhttpRequest
  14. // @connect     github.com
  15. // @connect     githubusercontent.com
  16. // @require     https://greasyfork.org/scripts/28721-mutations/code/mutations.js?version=188043
  17. // @icon        https://github.com/fluidicon.png
  18. // ==/UserScript==
  19. (() => {
  20. 	"use strict";
  21.  
  22. 	GM_addStyle(`
  23. 		table.files tr.ghip-image-previews,
  24. 			table.files.ghip-show-previews tbody tr.js-navigation-item {
  25. 			display:none; }
  26. 		table.files.ghip-show-previews tr.ghip-image-previews { display:table-row; }
  27. 		table.files.ghip-show-previews .ghip-non-image {
  28. 			height:80px; margin-top:15px; opacity:.2; }
  29. 		table.files.ghip-show-previews .image { position:relative; overflow:hidden;
  30. 			text-align:center; }
  31. 		.ghip-image-previews .image { padding:10px; }
  32. 		table.files.ghip-tiled .image { width:22.5%; height:180px;
  33. 			margin:12px !important; /* GitHub uses !important flags now :( */ }
  34. 		table.files.ghip-tiled .image .border-wrap img,
  35. 			.ghip-image-previews .border-wrap svg { max-height:130px; }
  36. 		table.files.ghip-fullw .image { width:97%; height:auto; }
  37. 		/* zoom doesn't work in Firefox, but "-moz-transform:scale(3);"
  38. 			doesn't limit the size of the image, so it overflows */
  39. 		table.files.ghip-tiled .image:hover img:not(.ghip-non-image) { zoom:3; }
  40. 		.ghip-image-previews .border-wrap img,
  41. 			.ghip-image-previews .border-wrap svg { max-width:95%; }
  42. 		.ghip-image-previews .border-wrap h4 { white-space:nowrap;
  43. 			text-overflow:ellipsis; margin-bottom:5px; }
  44. 		.ghip-image-previews .border-wrap h4.ghip-file-name { overflow:hidden; }
  45. 		.btn.ghip-tiled > *, .btn.ghip-fullw > *, .ghip-image-previews iframe {
  46. 			pointer-events:none; vertical-align:baseline; }
  47. 		.image .ghip-file-type { font-size:30px; top:-1.8em; position:relative;
  48. 			z-index:2; }
  49. 		.ghip-content span.exploregrid-item .ghip-file-name { cursor:default; }
  50. 		/* override GitHub-Dark styles */
  51. 		table.files img[src*='octocat-spinner'], img[src='/images/spinner.gif'] {
  52. 			width:auto !important; height:auto !important; }
  53. 		table.files td .simplified-path { color:#888 !important; }
  54. 	`);
  55.  
  56. 	// supported img types
  57. 	const imgExt = /(png|jpg|jpeg|gif|tif|tiff|bmp|webp)$/i,
  58. 		svgExt = /svg$/i,
  59.  
  60. 		tiled = `
  61. 			<svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 16 16">
  62. 				<path d="M0 0h7v7H0zM9 9h7v7H9zM9 0h7v7H9zM0 9h7v7H0z"/>
  63. 			</svg>
  64. 		`,
  65. 		fullWidth = `
  66. 			<svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 16 16">
  67. 				<path d="M0 0h16v7H0zM0 9h16v7H0z"/>
  68. 			</svg>
  69. 		`,
  70. 		imgTemplate = [
  71. 			// not using backticks here
  72. 			"<a href='${url}' class='exploregrid-item image m-3 float-left js-navigation-open' rel='nofollow'>",
  73. 			"<span class='border-wrap'>${image}</span>",
  74. 			"</a>"
  75. 		].join(""),
  76. 		spanTemplate = [
  77. 			"<span class='exploregrid-item image m-3 float-left'>",
  78. 			"<span class='border-wrap'>${image}</span>",
  79. 			"</span>"
  80. 		].join("");
  81.  
  82. 	function addToggles() {
  83. 		if ($(".gh-img-preview")) {
  84. 			return;
  85. 		}
  86. 		const div = document.createElement("div"),
  87. 			btn = `btn btn-sm BtnGroup-item tooltipped tooltipped-n" aria-label="Show`;
  88. 		div.className = "BtnGroup float-right gh-img-preview";
  89. 		div.innerHTML = `
  90. 			<div class="ghip-tiled ${btn} tiled files with image preview">${tiled}</div>
  91. 			<div class="ghip-fullw ${btn} full width files with image preview">${fullWidth}</div>
  92. 		`;
  93. 		$(".file-navigation").appendChild(div);
  94.  
  95. 		$(".ghip-tiled", div).addEventListener("click", () => {
  96. 			openView("tiled");
  97. 		});
  98. 		$(".ghip-fullw", div).addEventListener("click", () => {
  99. 			openView("fullw");
  100. 		});
  101. 	}
  102.  
  103. 	function setInitState() {
  104. 		const view = GM_getValue("gh-image-preview");
  105. 		if (view) {
  106. 			openView(view);
  107. 		}
  108. 	}
  109.  
  110. 	function openView(name) {
  111. 		const el = $(".ghip-" + name);
  112. 		if (el) {
  113. 			el.classList.toggle("selected");
  114. 			if (el.classList.contains("selected")) {
  115. 				GM_setValue("gh-image-preview", name);
  116. 				showPreview(name);
  117. 			} else {
  118. 				GM_setValue("gh-image-preview", "");
  119. 				showList();
  120. 			}
  121. 		}
  122. 	}
  123.  
  124. 	function showPreview(size) {
  125. 		buildPreviews();
  126. 		const table = $("table.files"),
  127. 			btn1 = "ghip-" + size,
  128. 			btn2 = "ghip-" + (size === "fullw" ? "tiled" : "fullw");
  129. 		table.classList.add(...["ghip-show-previews", btn1]);
  130. 		$(".btn." + btn1).classList.add("selected");
  131. 		table.classList.remove(btn2);
  132. 		$(".btn." + btn2).classList.remove("selected");
  133. 	}
  134.  
  135. 	function showList() {
  136. 		$("table.files").classList.remove(...[
  137. 			"ghip-show-previews",
  138. 			"ghip-tiled",
  139. 			"ghip-fullw"
  140. 		]);
  141. 		$(".btn.ghip-tiled").classList.remove("selected");
  142. 		$(".btn.ghip-fullw").classList.remove("selected");
  143. 	}
  144.  
  145. 	function buildPreviews() {
  146. 		let template, url, temp, noExt,
  147. 			imgs = "<td colspan='4' class='ghip-content'>",
  148. 			indx = 0;
  149. 		const row = document.createElement("tr"),
  150. 			table = $("table.files tbody:last-child"),
  151. 			files = $$("tr.js-navigation-item"),
  152. 			len = files.length;
  153. 		row.className = "ghip-image-previews";
  154. 		if ($(".ghip-image-previews")) {
  155. 			temp = $(".ghip-image-previews");
  156. 			temp.parentNode.removeChild(temp);
  157. 		}
  158. 		if (table) {
  159. 			for (indx = 0; indx < len; indx++) {
  160. 				// not every submodule includes a link; reference examples from
  161. 				// see https://github.com/electron/electron/tree/v1.1.1/vendor
  162. 				temp = $("td.content a", files[indx]) ||
  163. 					$("td.content span span", files[indx]);
  164. 				// use innerHTML because some links include path - see "third_party/lss"
  165. 				template = temp ? temp.innerHTML.trim() + "</h4>" : "";
  166. 				// temp = temp && $("a", temp);
  167. 				url = temp && temp.nodeName === "A" ? temp.href : "";
  168. 				// add link color
  169. 				template = "<h4 class='ghip-file-name" + (url ? " text-blue" : "") +
  170. 					"'>" + template;
  171. 				if (imgExt.test(url)) {
  172. 					// *** image preview ***
  173. 					template += "<img src='" + url + "?raw=true'/>";
  174. 					imgs += imgTemplate
  175. 						.replace("${url}", url)
  176. 						.replace("${image}", template);
  177. 				} else if (svgExt.test(url)) {
  178. 					// *** svg preview ***
  179. 					// loaded & encoded because GitHub sets content-type headers as
  180. 					// a string
  181. 					temp = url.substring(url.lastIndexOf("/") + 1, url.length);
  182. 					template += `<img data-svg-holder="${temp}" alt="${temp}" />`;
  183. 					imgs += updateTemplate(url, template);
  184. 					getSVG(url + "?raw=true");
  185. 				} else {
  186. 					// *** non-images (file/folder icons) ***
  187. 					temp = $("td.icon svg", files[indx]);
  188. 					if (temp) {
  189. 						// non-files svg class: "octicon-file-directory" or
  190. 						// "octicon-file-submodule"
  191. 						noExt = temp.classList.contains("octicon-file-directory") ||
  192. 							temp.classList.contains("octicon-file-submodule");
  193. 						// add xmlns otherwise the svg won't work inside an img
  194. 						// GitHub doesn't include this attribute on any svg octicons
  195. 						temp = temp.outerHTML
  196. 							.replace("<svg", "<svg xmlns='http://www.w3.org/2000/svg'");
  197. 						// include "leaflet-tile-container" to invert icon for GitHub-Dark
  198. 						template += "<span class='leaflet-tile-container'>" +
  199. 							"<img class='ghip-non-image' src='data:image/svg+xml;base64," +
  200. 							window.btoa(temp) + "'/>" +
  201. 							"</span>";
  202. 						// get file name + extension
  203. 						temp = url.substring(url.lastIndexOf("/") + 1, url.length);
  204. 						// don't include extension for folders, or files with no extension,
  205. 						// or files starting with a "." (e.g. ".gitignore")
  206. 						template += (!noExt && temp.indexOf(".") > 0) ?
  207. 							"<h4 class='ghip-file-type'>" +
  208. 							temp
  209. 								.substring(temp.lastIndexOf(".") + 1, temp.length)
  210. 								.toUpperCase() +
  211. 							"</h4>" : "";
  212. 						imgs += url ?
  213. 							updateTemplate(url, template) :
  214. 							// empty url; use non-link template
  215. 							// see "depot_tools @ 4fa73b8" at
  216. 							// https://github.com/electron/electron/tree/v1.1.1/vendor
  217. 							updateTemplate(url, template, spanTemplate);
  218. 					} else if (files[indx].classList.contains("up-tree")) {
  219. 						// Up tree link
  220. 						temp = $("td:nth-child(2) a", files[indx]);
  221. 						url = temp ? temp.href : "";
  222. 						imgs += url ?
  223. 							updateTemplate(
  224. 								url,
  225. 								"<h4 class='text-blue'>&middot;&middot;</h4>"
  226. 							) : "";
  227. 					}
  228. 				}
  229. 			}
  230. 			row.innerHTML = imgs + "</td>";
  231. 			table.appendChild(row);
  232. 		}
  233. 	}
  234.  
  235. 	function updateTemplate(url, img, tmpl) {
  236. 		return (tmpl || imgTemplate)
  237. 			.replace("${url}", url)
  238. 			.replace("${image}", img);
  239. 	}
  240.  
  241. 	function getSVG(url) {
  242. 		GM_xmlhttpRequest({
  243. 			method: "GET",
  244. 			url,
  245. 			onload: response => {
  246. 				let encoded;
  247. 				const url = response.finalUrl,
  248. 					file = url.substring(url.lastIndexOf("/") + 1, url.length),
  249. 					target = $("[data-svg-holder='" + file + "']");
  250. 				if (target) {
  251. 					encoded = window.btoa(response.responseText);
  252. 					target.src = "data:image/svg+xml;base64," + encoded;
  253. 				}
  254. 			}
  255. 		});
  256. 	}
  257.  
  258. 	function $(selector, el) {
  259. 		return (el || document).querySelector(selector);
  260. 	}
  261. 	function $$(selector, el) {
  262. 		return Array.from((el || document).querySelectorAll(selector));
  263. 	}
  264.  
  265. 	function init() {
  266. 		if ($("table.files")) {
  267. 			addToggles();
  268. 			setInitState();
  269. 		}
  270. 	}
  271.  
  272. 	document.addEventListener("ghmo:container", init);
  273. 	init();
  274. })();