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GitHub Code Colors

A userscript that adds a color swatch next to the code color definition

目前為 2016-09-12 提交的版本，檢視 最新版本。

  1. // ==UserScript==
  2. // @name          GitHub Code Colors
  3. // @version       1.1.0
  4. // @description   A userscript that adds a color swatch next to the code color definition
  5. // @license       https://creativecommons.org/licenses/by-sa/4.0/
  6. // @namespace     http://github.com/Mottie
  7. // @include       https://github.com/*
  8. // @grant         GM_addStyle
  9. // @run-at        document-idle
  10. // @author        Rob Garrison
  11. // ==/UserScript==
  12. /* global GM_addStyle */
  13. /* jshint esnext:true, unused:true */
  14. (() => {
  15. 	"use strict";
  16.  
  17. 	GM_addStyle(`
  18. 		.ghcc-block { width:12px; height:12px; display:inline-block;
  19. 			vertical-align:middle; margin-right:4px; border:1px solid #555; }
  20. 	`);
  21.  
  22. 	let busy = false;
  23. 	const namedColors = [
  24. 			"aliceblue", "antiquewhite", "aqua", "aquamarine", "azure", "beige",
  25. 			"bisque", "black", "blanchedalmond", "blue", "blueviolet", "brown",
  26. 			"burlywood", "cadetblue", "chartreuse", "chocolate", "coral",
  27. 			"cornflowerblue", "cornsilk", "crimson", "cyan", "darkblue", "darkcyan",
  28. 			"darkgoldenrod", "darkgray", "darkgrey", "darkgreen", "darkkhaki",
  29. 			"darkmagenta", "darkolivegreen", "darkorange", "darkorchid", "darkred",
  30. 			"darksalmon", "darkseagreen", "darkslateblue", "darkslategray",
  31. 			"darkslagegrey", "darkturquoise", "darkviolet", "deeppink", "deepskyblue",
  32. 			"dimgray", "dimgrey", "dodgerblue", "firebrick", "floralwhite",
  33. 			"forestgreen", "fuchsia", "gainsboro", "ghostwhite", "gold", "goldenrod",
  34. 			"gray", "grey", "green", "greenyellow", "honeydew", "hotpink",
  35. 			"indianred", "indigo", "ivory", "khaki", "lavender", "lavenderblush",
  36. 			"lawngreen", "lemonchiffon", "lightblue", "lightcoral", "lightcyan",
  37. 			"lightgoldenrodyellow", "lightgray", "lightgrey", "lightgreen",
  38. 			"lightpink", "lightsalmon", "lightseagreen", "lightskyblue",
  39. 			"lightslategray", "lightslategrey", "lightsteelblue", "lightyellow",
  40. 			"lime", "limegreen", "linen", "magenta", "maroon", "mediumaquamarine",
  41. 			"mediumblue", "mediumorchid", "mediumpurple", "mediumseagreen",
  42. 			"mediumslateblue", "mediumspringgreen", "mediumturquoise",
  43. 			"mediumvioletred", "midnightblue", "mintcream", "mistyrose", "moccasin",
  44. 			"navajowhite", "navy", "oldlace", "olive", "olivedrab", "orange",
  45. 			"orangered", "orchid", "palegoldenrod", "palegreen", "paleturquoise",
  46. 			"palevioletred", "papayawhip", "peachpuff", "peru", "pink", "plum",
  47. 			"powderblue", "purple", "rebeccapurple", "red", "rosybrown", "royalblue",
  48. 			"saddlebrown", "salmon", "sandybrown", "seagreen", "seashell", "sienna",
  49. 			"silver", "skyblue", "slateblue", "slategray", "slategrey", "snow",
  50. 			"springgreen", "steelblue", "tan", "teal", "thistle", "tomato",
  51. 			"turquoise", "violet", "wheat", "white", "whitesmoke", "yellow",
  52. 			"yellowgreen"
  53. 		].join("|"),
  54.  
  55. 		// don't use a div, because GitHub-Dark adds a :hover background
  56. 		// color definition on divs
  57. 		block = document.createElement("span");
  58. 	block.className = "ghcc-block";
  59.  
  60. 	function addNode(el, val) {
  61. 		const node = block.cloneNode();
  62. 		node.style.backgroundColor = val;
  63. 		// don't add node if color is invalid
  64. 		if (node.style.backgroundColor !== "") {
  65. 			el.insertBefore(node, el.childNodes[0]);
  66. 		}
  67. 	}
  68.  
  69. 	function addColors() {
  70. 		busy = true;
  71. 		if (document.querySelector(".highlight")) {
  72. 			let indx = 0;
  73. 			const regexNamed = new RegExp("^(" + namedColors + ")$", "i"),
  74. 				// #123, #123456 or 0x123456 (unix style colors, used by three.js)
  75. 				regexHex = /^(#|0x)([0-9A-F]{6}|[0-9A-F]{3})$/i,
  76. 				// rgb(0,0,0) or rgba(0,0,0,0.2)
  77. 				regexRGB = /^rgba?(\([^\)]+\))?/i,
  78. 				// hsl(0,0%,0%) or hsla(0,0%,0%,0.2);
  79. 				regexHSL = /^hsla?(\([^\)]+\))?/i,
  80.  
  81. 				// misc regex
  82. 				regexQuotes = /['"]/g,
  83. 				regexUnix = /^0x/,
  84. 				regexPercent = /%%/g,
  85.  
  86. 				// .pl-c1 targets css hex colors, "rgb" and "hsl"
  87. 				els = document.querySelectorAll(".pl-c1, .pl-s"),
  88. 				len = els.length;
  89.  
  90. 			// loop with delay to allow user interaction
  91. 			const loop = () => {
  92. 				let el, txt, tmp,
  93. 					// max number of DOM insertions per loop
  94. 					max = 0;
  95. 				while (max < 20 && indx < len) {
  96. 					if (indx >= len) {
  97. 						return;
  98. 					}
  99. 					el = els[indx];
  100. 					txt = el.textContent;
  101. 					if (el.classList.contains("pl-s")) {
  102. 						txt = txt.replace(regexQuotes, "");
  103. 					}
  104. 					if (regexHex.test(txt) || regexNamed.test(txt)) {
  105. 						if (!el.querySelector(".ghcc-block")) {
  106. 							addNode(el, txt.replace(regexUnix, "#"));
  107. 							max++;
  108. 						}
  109. 					} else if (regexRGB.test(txt)) {
  110. 						if (!el.querySelector(".ghcc-block")) {
  111. 							txt = el.classList.contains("pl-s") ?
  112. 								// color in a string contains everything
  113. 								txt.match(regexRGB)[0] :
  114. 								txt + "(" + els[++indx].textContent + ")";
  115. 							addNode(el, txt);
  116. 							max++;
  117. 						}
  118. 					} else if (regexHSL.test(txt)) {
  119. 						if (!el.querySelector(".ghcc-block")) {
  120. 							tmp = /a$/i.test(txt);
  121. 							txt = el.classList.contains("pl-s") ?
  122. 								// color in a string contains everything
  123. 								txt.match(regexHSL)[0] :
  124. 								// traverse this HTML... & els only contains the pl-c1 nodes
  125. 								// <span class="pl-c1">hsl</span>(<span class="pl-c1">1</span>,
  126. 								// <span class="pl-c1">1</span><span class="pl-k">%</span>,
  127. 								// <span class="pl-c1">1</span><span class="pl-k">%</span>);
  128. 								txt + "(" + els[++indx].textContent + "," +
  129. 								els[++indx].textContent + "%," +
  130. 								// hsla needs one more parameter
  131. 								els[++indx].textContent + "%" +
  132. 								(tmp ? "," + els[++indx].textContent : "") + ")";
  133. 							// sometimes (previews only?) the .pl-k span is nested inside
  134. 							// the .pl-c1 span, so we end up with "%%"
  135. 							addNode(el, txt.replace(regexPercent, "%"));
  136. 							max++;
  137. 						}
  138. 					}
  139. 					indx++;
  140. 				}
  141. 				if (indx < len) {
  142. 					setTimeout(() => {
  143. 						loop();
  144. 					}, 200);
  145. 				}
  146. 			};
  147. 			loop();
  148. 		}
  149. 		busy = false;
  150. 	}
  151.  
  152. 	Array.from(
  153. 		document.querySelectorAll(
  154. 			"#js-repo-pjax-container, #js-pjax-container, .js-preview-body"
  155. 		)
  156. 	).forEach(
  157. 		target => {
  158. 			new MutationObserver(mutations => {
  159. 				mutations.forEach(mutation => {
  160. 					// preform checks before adding code wrap to minimize function calls
  161. 					if (!busy && mutation.target === target) {
  162. 						addColors();
  163. 					}
  164. 				});
  165. 			}).observe(target, {
  166. 				childList: true,
  167. 				subtree: true
  168. 			});
  169. 		});
  170.  
  171. 	addColors();
  172. })();