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Adds colors to files by type, displays small images in place of file-type icons in a repository source tree
// ==UserScript==
// @name GitHub file list beautifier
// @description Adds colors to files by type, displays small images in place of file-type icons in a repository source tree
// @license MIT License
//
// @version 4.0.1
//
// @match https://github.com/*
//
// @grant none
// @run-at document-start
//
// @author wOxxOm
// @namespace wOxxOm.scripts
// @icon https://octodex.github.com/images/murakamicat.png
// ==/UserScript==
'use strict';
let savedConfig = {};
try {
savedConfig = JSON.parse(localStorage.FileListBeautifier) || {};
} catch (e) {}
const config = Object.assign({},
...Object.entries({
iconSize: 24,
colorSeed1: 13,
colorSeed2: 1299721,
colorSeed3: 179426453,
}).map(([k, v]) => ({[k]: +savedConfig[k] || v})));
const IMG_CLS = 'wOxxOm-image-icon';
const rxImages = /^(png|jpe?g|bmp|gif|cur|ico|svg)$/i;
const styleQueue = [];
const {sheet} = document.documentElement.appendChild($create('style', {
textContent: /*language=CSS*/ `
.${IMG_CLS} {
width: ${config.iconSize}px;
height: ${config.iconSize}px;
object-fit: scale-down;
margin: 0 -4px;
}
a[file-type=":folder"] {
font-weight: bold;
}
`.replace(/;/g, '!important;'),
}));
const filetypes = {};
const ME = Symbol(GM_info.script.name);
const ob = new MutationObserver(start);
let lumaBias, lumaFix, lumaAmp;
requestAnimationFrame(start);
function start() {
beautify();
ob.observe(document, {subtree: true, childList: true});
}
function beautify() {
for (const el of document.querySelectorAll('.react-directory-truncate, .js-navigation-open')) {
if (ME in el)
continue;
el[ME] = true;
const isOld = el.tagName === 'A';
const a = isOld ? el : el.getElementsByTagName('a')[0];
const url = a && a.href;
if (!url)
continue;
const icon = el.closest(isOld ? '.js-navigation-item' : 'td').querySelector('svg');
if (icon.classList.contains(isOld ? 'octicon-file-directory-fill' : 'icon-directory')) {
a.setAttribute('file-type', ':folder');
continue;
}
const ext = url.match(/\.(\w+)$|$/)[1] || ':empty';
a.setAttribute('file-type', ext);
if (!filetypes[ext])
addFileTypeStyle(ext);
if (rxImages.test(ext)) {
const m = url.match(/github\.com\/(.+?\/)blob\/(.*)$/);
const next = icon.nextElementSibling;
if (!m || next && next[ME])
continue;
icon.replaceWith($create('img', {
[ME]: true,
className: IMG_CLS,
src: `https://raw.githubusercontent.com/${m[1]}${m[2]}`,
}));
}
}
}
function addFileTypeStyle(type) {
filetypes[type] = true;
if (!styleQueue.length)
requestAnimationFrame(commitStyleQueue);
styleQueue.push(type);
}
function commitStyleQueue() {
if (!lumaAmp) initLumaScale();
const seed2 = config.colorSeed2;
const seed3 = config.colorSeed3;
for (const type of styleQueue) {
const hash = calcSimpleHash(type);
const H = hash % 360;
const Hq = H / 60;
const S = hash * seed2 % 50 + 50 | 0;
const redFix = (Hq < 1 ? 1 - Hq : Hq > 4 ? (Hq - 4) / 2 : 0);
const blueFix = (Hq < 3 || Hq > 5 ? 0 : Hq < 4 ? Hq - 3 : 5 - Hq) * 3;
const L = hash * seed3 % lumaAmp + lumaBias + (redFix + blueFix) * lumaFix * S / 100 | 0;
sheet.insertRule(/*language=CSS*/ `
a[file-type="${type}"]:not(#foo) {
color: hsl(${H},${S}%,${L}%) !important;
}
`);
}
styleQueue.length = 0;
}
function calcSimpleHash(text) {
let hash = 0;
for (let i = 0, len = text.length; i < len; i++)
hash = ((hash << 5) - hash) + text.charCodeAt(i);
return Math.abs(hash * config.colorSeed1 | 0);
}
function initLumaScale() {
const [, r, g, b] = getComputedStyle(document.body).backgroundColor.split(/[^\d.]+/).map(parseFloat);
const isDark = (r * .2126 + g * .7152 + b * .0722) < 128;
[lumaBias, lumaAmp, lumaFix] = isDark ? [30, 50, 12] : [25, 15, 0];
}
function $create(tag, props) {
return Object.assign(document.createElement(tag), props);
}