A userscript that adds links to diff and pull request headers to jump back & forth between files
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// ==UserScript==
// @name GitHub Diff Links
// @version 1.1.1
// @description A userscript that adds links to diff and pull request headers to jump back & forth between files
// @license https://creativecommons.org/licenses/by-sa/4.0/
// @namespace http://github.com/Mottie
// @include https://github.com/*
// @run-at document-idle
// @grant GM_addStyle
// @author Rob Garrison
// ==/UserScript==
/* jshint esnext:true, unused:true */
(() => {
"use strict";
// sometimes tooltips are too narrow...
GM_addStyle(".gh-diff-links:after { min-width: 120px; }");
const button = document.createElement("a"),
// button [ InnerHTML, tooltip ]
nextBtn = ["Next", "Jump to next file\n("],
prevBtn = ["Prev", "Jump to previous file\n(" ];
button.className = "btn btn-sm tooltipped tooltipped-s tooltipped-multiline" +
"gh-diff-links";
button.setAttribute("rel", "nofollow");
function addButton(el, content, link) {
var btn = button.cloneNode(),
txt = el.classList.contains("select-menu-item") ?
$(".description", el).textContent :
link.textContent || "";
// clean up whitespace
txt = txt.replace(/\s+/g, " ").trim();
// only add file name to tooltip
txt = txt.substring(txt.lastIndexOf("/") + 1, txt.length);
btn.innerHTML = content[0];
btn.setAttribute("aria-label", content[1] + txt + ")" );
btn.href = link.hash;
// prepend button
el.insertBefore(btn, el.childNodes[0]);
}
function addSpace(el, content) {
var btn = button.cloneNode();
btn.disabled = true;
btn.className = "btn btn-sm gh-diff-links disabled";
btn.innerHTML = content[0];
el.insertBefore(btn, el.childNodes[0]);
}
function addLinks() {
let last,
diffLinks = $$(".gh-diff-links"),
links = $$(`
#toc ol.content li > a,
.pr-toolbar .toc-select .select-menu-item
`);
// add diff links if they don't already exist
if (links.length !== diffLinks.length) {
// remove old links (just in case)
diffLinks.forEach(el => {
el.parentNode.removeChild(el);
});
// links & file-actions "should" be the same length
last = links.length - 1;
$$(".file-actions").forEach((el, indx) => {
if (indx === 0) {
addButton(el, nextBtn, links[indx + 1]);
addSpace(el, prevBtn);
} else if (indx === last) {
// add dummy "next" button to keep spacing
addSpace(el, nextBtn);
addButton(el, prevBtn, links[indx - 1]);
} else {
addButton(el, nextBtn, links[indx + 1]);
addButton(el, prevBtn, links[indx - 1]);
}
});
}
}
function init() {
if ($("#files.diff-view") || $(".pr-toolbar")) {
addLinks();
}
}
function $(selector, el) {
return (el || document).querySelector(selector);
}
function $$(selector, el) {
return Array.from((el || document).querySelectorAll(selector));
}
document.addEventListener("pjax:end", init);
init();
})();