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GitHub Label Color Picker

A userscript that adds a color picker to the label color input

  1. // ==UserScript==
  2. // @name        GitHub Label Color Picker
  3. // @version     1.0.9
  4. // @description A userscript that adds a color picker to the label color input
  5. // @license     MIT
  6. // @author      Rob Garrison
  7. // @contributor darkred
  8. // @namespace   https://github.com/Mottie
  9. // @match       https://github.com/*
  10. // @run-at      document-idle
  11. // @grant       GM_addStyle
  12. // @grant       GM_getValue
  13. // @grant       GM_setValue
  14. // @grant       GM_registerMenuCommand
  15. // @require     https://greasyfork.org/scripts/23181-colorpicker/code/colorPicker.js?version=147862
  16. // @require     https://greasyfork.org/scripts/398877-utils-js/code/utilsjs.js?version=1079637
  17. // @icon        https://github.githubassets.com/pinned-octocat.svg
  18. // @supportURL  https://github.com/Mottie/GitHub-userscripts/issues
  19. // ==/UserScript==
  20.  
  21. /* global jsColorPicker $ on */
  22. (() => {
  23. 	"use strict";
  24.  
  25. 	GM_addStyle(`
  26. 		div.cp-app { margin:100px 0 0 -7px; z-index:10; }
  27. 		.js-new-label-color-icon { pointer-events:none; }
  28. 		.js-new-label-color-icon.color-scale-black { color:#000 !important; }
  29. 	`);
  30.  
  31. 	function addPicker() {
  32. 		if ($(".js-new-label-color")) {
  33. 			jsColorPicker(".js-new-label-color-input", {
  34. 				customBG: "#222",
  35. 				noAlpha: true,
  36. 				renderCallback: function(colors) {
  37. 					const input = this && this.input;
  38. 					if (input) {
  39. 						updateSwatch(input, colors);
  40. 					}
  41. 				}
  42. 			});
  43. 		}
  44. 	}
  45.  
  46. 	function updateSwatch(input, colors) {
  47. 		input.value = colors.HEX;
  48. 		const colorStyle = calcStyle(colors.rgb, colors.hsl);
  49.  
  50. 		// Update color swatch next to input
  51. 		const inputSwatch = $(".js-new-label-color", input.closest("dd"));
  52. 		inputSwatch.style = colorStyle;
  53.  
  54. 		// Update label preview
  55. 		const labelSwatch = $(
  56. 			".js-label-preview .IssueLabel--big",
  57. 			input.closest(".Box-row")
  58. 		);
  59. 		labelSwatch.style = colorStyle;
  60. 	}
  61.  
  62. 	function calcStyle(rgb, hsl) {
  63. 		// GitHub adds CSS variables to the wrapper
  64. 		// rgb is used as the foreground (text) color
  65. 		// hsl is used to calculate a color variant for the background
  66. 		const multiplier = { h: 360, s: 100, l: 100 };
  67. 		const fg = Object.entries(rgb).map(
  68. 			([c, v]) => `--label-${c}:${(v * 255).toFixed(0)}`
  69. 		);
  70. 		const bg = Object.entries(hsl).map(
  71. 			([c, v]) => `--label-${c}:${(v * multiplier[c]).toFixed(0)}`
  72. 		);
  73. 		// --label-r:255; --label-g:255; --label-b:255; --label-h:15; --label-s:0; --label-l:100;
  74. 		return `${fg.join("; ")}; ${bg.join("; ")}`;
  75. 	}
  76.  
  77. 	/* replace colorPicker storage */
  78. 	window.ColorPicker.docCookies = (key, val) => {
  79. 		if (typeof val === "undefined") {
  80. 			return GM_getValue(key);
  81. 		}
  82. 		GM_setValue(key, val);
  83. 	};
  84.  
  85. 	/* colorPickerMemosNoAlpha *MUST* follow this format
  86. 	"'rgba(83,25,231,1)','rgba(86,66,66,1)','rgba(22,20,223,1)'"
  87. 	*/
  88. 	function convertColorsToRgba(values) {
  89. 		// see http://stackoverflow.com/a/26196012/145346
  90. 		return values
  91. 			.replace(/['"]/g, "")
  92. 			.split(/\s*,(?![^()]*(?:\([^()]*\))?\))\s*/g)
  93. 			.map(val => {
  94. 				const rgb = hexToRgb(val);
  95. 				if (rgb) {
  96. 					return `'rgba(${rgb.r},${rgb.g},${rgb.b},1)'`;
  97. 				} else if (rgb === null && val.indexOf("rgba(") > -1) {
  98. 					// allow adding rgba() definitions
  99. 					return`'${val}'`;
  100. 				}
  101. 			})
  102. 			.filter(Boolean)
  103. 			.join(",");
  104. 	}
  105.  
  106. 	// Modified code from http://stackoverflow.com/a/5624139/145346
  107. 	// Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
  108. 	const shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
  109. 	function hexToRgb(hex) {
  110. 		const modHex = hex.replace(shorthandRegex, (_, r, g, b) => {
  111. 			return r + r + g + g + b + b;
  112. 		});
  113. 		const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(modHex);
  114. 		return result ? {
  115. 			r: parseInt(result[1], 16),
  116. 			g: parseInt(result[2], 16),
  117. 			b: parseInt(result[3], 16)
  118. 		} : null;
  119. 	}
  120.  
  121. 	// Add GM options
  122. 	GM_registerMenuCommand(
  123. 		"Set label ColorPicker swatches (8 HEX or RGBA Max)",
  124. 		() => {
  125. 			const colors = GM_getValue("colorPickerMemosNoAlpha", "#000000,#ffffff"),
  126. 				val = prompt("Set label default colors (8 max):", colors);
  127. 			if (val !== null && typeof val === "string") {
  128. 				GM_setValue("colorPickerMemosNoAlpha", convertColorsToRgba(val));
  129. 			}
  130. 		}
  131. 	);
  132.  
  133. 	on(document.body, "click", event => {
  134. 		// initialize if "Edit" or "New label" button clicked
  135. 		// because "Save changes" updates the entire item
  136. 		if (
  137. 			event.target?.matches(".js-edit-label, .js-details-target")
  138. 		) {
  139. 			addPicker();
  140. 		}
  141. 	});
  142. 	addPicker();
  143. })();