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GitHub Image Preview

A userscript that adds clickable image thumbnails

当前为 2017-03-25 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name          GitHub Image Preview
  3. // @version       1.1.4
  4. // @description   A userscript that adds clickable image thumbnails
  5. // @license       https://creativecommons.org/licenses/by-sa/4.0/
  6. // @namespace     https://github.com/Mottie
  7. // @include       https://github.com/*
  8. // @run-at        document-idle
  9. // @grant         GM_addStyle
  10. // @grant         GM_getValue
  11. // @grant         GM_setValue
  12. // @grant         GM_xmlhttpRequest
  13. // @connect       github.com
  14. // @connect       githubusercontent.com
  15. // @author        Rob Garrison
  16. // ==/UserScript==
  17. (() => {
  18. 	"use strict";
  19.  
  20. 	GM_addStyle(`
  21. 		table.files tr.ghip-image-previews,
  22. 			table.files.ghip-show-previews tbody tr.js-navigation-item {
  23. 			display:none; }
  24. 		table.files.ghip-show-previews tr.ghip-image-previews { display:table-row; }
  25. 		table.files.ghip-show-previews .ghip-non-image {
  26. 			height:80px; margin-top:15px; opacity:.2; }
  27. 		table.files.ghip-show-previews .image { position:relative; overflow:hidden;
  28. 			text-align:center; }
  29. 		.ghip-image-previews .image { padding:10px; }
  30. 		table.files.ghip-tiled .image { width:22.5%; height:180px;
  31. 			margin:12px !important; /* GitHub uses !important flags now :( */ }
  32. 		table.files.ghip-tiled .image .border-wrap img,
  33. 			.ghip-image-previews .border-wrap svg { max-height:130px; }
  34. 		table.files.ghip-fullw .image { width:97%; height:auto; }
  35. 		/* zoom doesn't work in Firefox, but "-moz-transform:scale(3);"
  36. 			doesn't limit the size of the image, so it overflows */
  37. 		table.files.ghip-tiled .image:hover img:not(.ghip-non-image) { zoom:3; }
  38. 		.ghip-image-previews .border-wrap img,
  39. 			.ghip-image-previews .border-wrap svg { max-width:95%; }
  40. 		.ghip-image-previews .border-wrap h4 { white-space:nowrap;
  41. 			text-overflow:ellipsis; margin-bottom:5px; }
  42. 		.ghip-image-previews .border-wrap h4.ghip-file-name { overflow:hidden; }
  43. 		.btn.ghip-tiled > *, .btn.ghip-fullw > *, .ghip-image-previews iframe {
  44. 			pointer-events:none; vertical-align:baseline; }
  45. 		.image .ghip-file-type { font-size:30px; top:-1.8em; position:relative;
  46. 			z-index:2; }
  47. 		.ghip-content span.exploregrid-item .ghip-file-name { cursor:default; }
  48. 		/* override GitHub-Dark styles */
  49. 		table.files img[src*='octocat-spinner'], img[src='/images/spinner.gif'] {
  50. 			width:auto !important; height:auto !important; }
  51. 		table.files td .simplified-path { color:#888 !important; }
  52. 	`);
  53.  
  54. 	// supported img types
  55. 	const imgExt = /(png|jpg|jpeg|gif|tif|tiff|bmp|webp)$/i,
  56. 		svgExt = /svg$/i,
  57.  
  58. 		tiled = `
  59. 			<svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 16 16">
  60. 				<path d="M0 0h7v7H0zM9 9h7v7H9zM9 0h7v7H9zM0 9h7v7H0z"/>
  61. 			</svg>
  62. 		`,
  63. 		fullWidth = `
  64. 			<svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 16 16">
  65. 				<path d="M0 0h16v7H0zM0 9h16v7H0z"/>
  66. 			</svg>
  67. 		`,
  68. 		imgTemplate = [
  69. 			// not using backticks here
  70. 			"<a href='${url}' class='exploregrid-item image m-3 float-left js-navigation-open' rel='nofollow'>",
  71. 			"<span class='border-wrap'>${image}</span>",
  72. 			"</a>"
  73. 		].join(""),
  74. 		spanTemplate = [
  75. 			"<span class='exploregrid-item image m-3 float-left'>",
  76. 			"<span class='border-wrap'>${image}</span>",
  77. 			"</span>"
  78. 		].join("");
  79.  
  80. 	function addToggles() {
  81. 		if ($(".gh-img-preview")) {
  82. 			return;
  83. 		}
  84. 		const div = document.createElement("div"),
  85. 			btn = `btn btn-sm BtnGroup-item tooltipped tooltipped-n" aria-label="Show`;
  86. 		div.className = "BtnGroup float-right gh-img-preview";
  87. 		div.innerHTML = `
  88. 			<div class="ghip-tiled ${btn} tiled files with image preview">${tiled}</div>
  89. 			<div class="ghip-fullw ${btn} full width files with image preview">${fullWidth}</div>
  90. 		`;
  91. 		$(".file-navigation").appendChild(div);
  92.  
  93. 		$(".ghip-tiled", div).addEventListener("click", () => {
  94. 			openView("tiled");
  95. 		});
  96. 		$(".ghip-fullw", div).addEventListener("click", () => {
  97. 			openView("fullw");
  98. 		});
  99. 	}
  100.  
  101. 	function setInitState() {
  102. 		const view = GM_getValue("gh-image-preview");
  103. 		if (view) {
  104. 			openView(view);
  105. 		}
  106. 	}
  107.  
  108. 	function openView(name) {
  109. 		const el = $(".ghip-" + name);
  110. 		if (el) {
  111. 			el.classList.toggle("selected");
  112. 			if (el.classList.contains("selected")) {
  113. 				GM_setValue("gh-image-preview", name);
  114. 				showPreview(name);
  115. 			} else {
  116. 				GM_setValue("gh-image-preview", "");
  117. 				showList();
  118. 			}
  119. 		}
  120. 	}
  121.  
  122. 	function showPreview(size) {
  123. 		buildPreviews();
  124. 		const table = $("table.files"),
  125. 			btn1 = "ghip-" + size,
  126. 			btn2 = "ghip-" + (size === "fullw" ? "tiled" : "fullw");
  127. 		table.classList.add(...["ghip-show-previews", btn1]);
  128. 		$(".btn." + btn1).classList.add("selected");
  129. 		table.classList.remove(btn2);
  130. 		$(".btn." + btn2).classList.remove("selected");
  131. 	}
  132.  
  133. 	function showList() {
  134. 		$("table.files").classList.remove(...[
  135. 			"ghip-show-previews",
  136. 			"ghip-tiled",
  137. 			"ghip-fullw"
  138. 		]);
  139. 		$(".btn.ghip-tiled").classList.remove("selected");
  140. 		$(".btn.ghip-fullw").classList.remove("selected");
  141. 	}
  142.  
  143. 	function buildPreviews() {
  144. 		let template, url, temp, noExt,
  145. 			imgs = "<td colspan='4' class='ghip-content'>",
  146. 			indx = 0;
  147. 		const row = document.createElement("tr"),
  148. 			table = $("table.files tbody:last-child"),
  149. 			files = $$("tr.js-navigation-item"),
  150. 			len = files.length;
  151. 		row.className = "ghip-image-previews";
  152. 		if ($(".ghip-image-previews")) {
  153. 			temp = $(".ghip-image-previews");
  154. 			temp.parentNode.removeChild(temp);
  155. 		}
  156. 		if (table) {
  157. 			for (indx = 0; indx < len; indx++) {
  158. 				// not every submodule includes a link; reference examples from
  159. 				// see https://github.com/electron/electron/tree/v1.1.1/vendor
  160. 				temp = $("td.content a", files[indx]) ||
  161. 					$("td.content span span", files[indx]);
  162. 				// use innerHTML because some links include path - see "third_party/lss"
  163. 				template = temp ? temp.innerHTML.trim() + "</h4>" : "";
  164. 				// temp = temp && $("a", temp);
  165. 				url = temp && temp.nodeName === "A" ? temp.href : "";
  166. 				// add link color
  167. 				template = "<h4 class='ghip-file-name" + (url ? " text-blue" : "") +
  168. 					"'>" + template;
  169. 				if (imgExt.test(url)) {
  170. 					// *** image preview ***
  171. 					template += "<img src='" + url + "?raw=true'/>";
  172. 					imgs += imgTemplate
  173. 						.replace("${url}", url)
  174. 						.replace("${image}", template);
  175. 				} else if (svgExt.test(url)) {
  176. 					// *** svg preview ***
  177. 					// loaded & encoded because GitHub sets content-type headers as
  178. 					// a string
  179. 					temp = url.substring(url.lastIndexOf("/") + 1, url.length);
  180. 					template += `<img data-svg-holder="${temp}" alt="${temp}" />`;
  181. 					imgs += updateTemplate(url, template);
  182. 					getSVG(url + "?raw=true");
  183. 				} else {
  184. 					// *** non-images (file/folder icons) ***
  185. 					temp = $("td.icon svg", files[indx]);
  186. 					if (temp) {
  187. 						// non-files svg class: "octicon-file-directory" or
  188. 						// "octicon-file-submodule"
  189. 						noExt = temp.classList.contains("octicon-file-directory") ||
  190. 							temp.classList.contains("octicon-file-submodule");
  191. 						// add xmlns otherwise the svg won't work inside an img
  192. 						// GitHub doesn't include this attribute on any svg octicons
  193. 						temp = temp.outerHTML
  194. 							.replace("<svg", "<svg xmlns='http://www.w3.org/2000/svg'");
  195. 						// include "leaflet-tile-container" to invert icon for GitHub-Dark
  196. 						template += "<span class='leaflet-tile-container'>" +
  197. 							"<img class='ghip-non-image' src='data:image/svg+xml;base64," +
  198. 							window.btoa(temp) + "'/>" +
  199. 							"</span>";
  200. 						// get file name + extension
  201. 						temp = url.substring(url.lastIndexOf("/") + 1, url.length);
  202. 						// don't include extension for folders, or files with no extension,
  203. 						// or files starting with a "." (e.g. ".gitignore")
  204. 						template += (!noExt && temp.indexOf(".") > 0) ?
  205. 							"<h4 class='ghip-file-type'>" +
  206. 							temp
  207. 								.substring(temp.lastIndexOf(".") + 1, temp.length)
  208. 								.toUpperCase() +
  209. 							"</h4>" : "";
  210. 						imgs += url ?
  211. 							updateTemplate(url, template) :
  212. 							// empty url; use non-link template
  213. 							// see "depot_tools @ 4fa73b8" at
  214. 							// https://github.com/electron/electron/tree/v1.1.1/vendor
  215. 							updateTemplate(url, template, spanTemplate);
  216. 					} else if (files[indx].classList.contains("up-tree")) {
  217. 						// Up tree link
  218. 						temp = $("td:nth-child(2) a", files[indx]);
  219. 						url = temp ? temp.href : "";
  220. 						imgs += url ?
  221. 							updateTemplate(
  222. 								url,
  223. 								"<h4 class='text-blue'>&middot;&middot;</h4>"
  224. 							) : "";
  225. 					}
  226. 				}
  227. 			}
  228. 			row.innerHTML = imgs + "</td>";
  229. 			table.appendChild(row);
  230. 		}
  231. 	}
  232.  
  233. 	function updateTemplate(url, img, tmpl) {
  234. 		return (tmpl || imgTemplate)
  235. 			.replace("${url}", url)
  236. 			.replace("${image}", img);
  237. 	}
  238.  
  239. 	function getSVG(url) {
  240. 		GM_xmlhttpRequest({
  241. 			method: "GET",
  242. 			url,
  243. 			onload: response => {
  244. 				let encoded;
  245. 				const url = response.finalUrl,
  246. 					file = url.substring(url.lastIndexOf("/") + 1, url.length),
  247. 					target = $("[data-svg-holder='" + file + "']");
  248. 				if (target) {
  249. 					encoded = window.btoa(response.responseText);
  250. 					target.src = "data:image/svg+xml;base64," + encoded;
  251. 				}
  252. 			}
  253. 		});
  254. 	}
  255.  
  256. 	function $(selector, el) {
  257. 		return (el || document).querySelector(selector);
  258. 	}
  259. 	function $$(selector, el) {
  260. 		return Array.from((el || document).querySelectorAll(selector));
  261. 	}
  262.  
  263. 	function init() {
  264. 		if ($("table.files")) {
  265. 			addToggles();
  266. 			setInitState();
  267. 		}
  268. 	}
  269.  
  270. 	document.addEventListener("pjax:end", init);
  271. 	init();
  272. })();