A userscript that highlights filename & permission alterations
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// ==UserScript==
// @name GitHub Diff Filename
// @version 1.0.6
// @description A userscript that highlights filename & permission alterations
// @license MIT
// @author Rob Garrison
// @namespace https://github.com/Mottie
// @include https://github.com/*
// @run-at document-end
// @grant GM_getValue
// @grant GM_setValue
// @require https://greasyfork.org/scripts/28721-mutations/code/mutations.js?version=666427
// @icon https://github.githubassets.com/pinned-octocat.svg
// ==/UserScript==
(() => {
"use strict";
const arrow = "\u2192", // "→"
regex = new RegExp(`\\s${arrow}\\s`);
function processFileInfo(el) {
let node;
if (!$(".ghdfn", el)) {
const link = $("a", el);
// A file can be moved AND include permission changes
// e.g. main.js → scripts/main.js 100755 → 100644
// with file name inside link and permission changes outside in a text node
if (link && regex.test(link.textContent)) {
node = findMatchingNode(link)[0];
processNode(node);
}
node = findMatchingNode(el)[0];
processNode(node);
}
}
function processNode(node) {
if (node) {
let txt = node.textContent,
// modify right node first to maintain node text indexing
middle = txt.indexOf(arrow);
if (middle > -1) {
wrapParts({
start: middle + 2,
end: txt.length,
name: "ghdfn text-green",
node
});
}
middle = node.textContent.indexOf(arrow);
if (middle > -1) {
wrapParts({
start: 0,
end: middle - 1,
name: "ghdfn text-red",
node
});
}
}
}
function findMatchingNode(el) {
return [...el.childNodes].filter(
node => regex.test(node.textContent) && node.nodeType === 3
);
}
function wrapParts(data) {
let newNode, tmpNode;
const {start, end, name, node} = data;
if (node && node.nodeType === 3) {
tmpNode = node.splitText(start);
tmpNode.splitText(end - start);
newNode = document.createElement("span");
newNode.className = name;
newNode.textContent = tmpNode.textContent;
tmpNode.parentNode.replaceChild(newNode, tmpNode);
}
}
function $(str, el = document) {
return el.querySelector(str);
}
function $$(str, el = document) {
return [...el.querySelectorAll(str)];
}
function init() {
if ($("#files")) {
$$("#files .file-info").forEach(el => {
processFileInfo(el);
});
}
}
document.addEventListener("ghmo:container", init);
document.addEventListener("ghmo:diff", init);
init();
})();