A userscript that adds a toggle to show or hide diff files
// ==UserScript==
// @name GitHub Diff File Toggle
// @version 1.0.0
// @description A userscript that adds a toggle to show or hide diff files
// @license https://creativecommons.org/licenses/by-sa/4.0/
// @namespace https://github.com/StylishThemes
// @include https://github.com/*
// @grant GM_addStyle
// @run-at document-end
// @author StylishThemes
// ==/UserScript==
/* global GM_addStyle */
(function() {
"use strict";
/*
This code is also part of the GitHub-Dark Script (https://github.com/StylishThemes/GitHub-Dark-Script)
Extracted out into a separate userscript in case users only want to add this functionality
*/
var busy = false,
icon = [
"<svg class='octicon' xmlns='http://www.w3.org/2000/svg' width='10' height='6.5' viewBox='0 0 10 6.5'>",
"<path d='M0 1.497L1.504 0l3.49 3.76L8.505.016 10 1.52 4.988 6.51 0 1.496z'/>",
"</svg>",
].join(""),
// Add file diffs toggle
addFileToggle = function() {
busy = true;
var el, button,
files = document.querySelectorAll("#files .file-actions"),
indx = files.length;
while (indx--) {
el = files[indx];
if (!el.querySelector(".ghd-file-toggle")) {
button = document.querySelector("button");
button.type = "button";
button.className = "ghd-file-toggle btn btn-sm tooltipped tooltipped-n";
button.setAttribute("aria-label", "Click to Expand or Collapse file");
button.setAttribute("tabindex", "-1");
button.innerHTML = icon;
el.appendChild(button);
}
}
busy = false;
},
matches = function(el, selector) {
// https://developer.mozilla.org/en-US/docs/Web/API/Element/matches
var matches = document.querySelectorAll(selector),
i = matches.length;
while (--i >= 0 && matches.item(i) !== el) {}
return i > -1;
},
closest = function(el, selector) {
while (el && !matches(el, selector)) {
el = el.parentNode;
}
return matches(el, selector) ? el : null;
},
nextSiblings = function(el, selector) {
var siblings = [];
while ((el = el.nextSibling)) {
if (el && el.nodeType === 1 && matches(el, selector)) {
siblings.push(el);
}
}
return siblings;
},
toggleFile = function(event) {
busy = true;
var el, sibs, indx,
target = event.target;
target.classList.toggle("ghd-file-collapsed");
// find header
el = closest(target, ".file-header");
// toggle view of file or image; "image" class added to "Diff suppressed..."
sibs = nextSiblings(el, ".blob-wrapper, .render-wrapper, .image, .rich-diff");
indx = sibs && sibs.length || 0;
while (indx--) {
if (sibs[indx]) {
sibs[indx].classList.toggle("ghd-collapsed-file");
}
}
// shift+click toggle all files!
if (event.shiftKey) {
var loop,
isCollapsed = target.classList.contains("ghd-file-collapsed"),
toggles = document.querySelectorAll(".ghd-file-toggle");
indx = toggles.length;
while (indx--) {
el = toggles[indx];
if (el !== target) {
el.classList[isCollapsed ? "add" : "remove"]("ghd-file-collapsed");
el = closest(el, ".file-header");
sibs = nextSiblings(el, ".blob-wrapper, .render-wrapper, .image, .rich-diff");
loop = sibs && sibs.length || 0;
while (loop--) {
if (sibs[loop]) {
sibs[loop].classList[isCollapsed ? "add" : "remove"]("ghd-collapsed-file");
}
}
}
}
}
document.activeElement.blur();
busy = false;
},
addBindings = function() {
document.querySelector("body").addEventListener("click", function(event) {
var target = event.target;
if (target && target.classList.contains("ghd-file-toggle")) {
toggleFile(event);
return false;
}
});
},
targets = document.querySelectorAll([
"#js-repo-pjax-container",
"#js-pjax-container",
".js-preview-body"
].join(","));
// don't initialize if GitHub Dark Script is active
if (!document.querySelector("#ghd-menu")) {
GM_addStyle([
".ghd-collapsed-file, .file.open .data.ghd-collapsed-file { display: none; }",
// file collapsed icon
".ghd-file-collapsed svg { -webkit-transform:rotate(90deg); transform:rotate(90deg); }",
".ghd-file-toggle svg.octicon { pointer-events: none; vertical-align: middle; }"
].join(""));
Array.prototype.forEach.call(targets, function(target) {
new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
// preform checks before adding code wrap to minimize function calls
if (!busy && mutation.target === target) {
addFileToggle();
}
});
}).observe(target, {
childList: true,
subtree: true
});
});
addBindings();
addFileToggle();
}
})();