A userscript that adds monospace font toggle to comments
// ==UserScript==
// @name GitHub Monospace Font Toggle
// @version 1.1.0
// @description A userscript that adds monospace font toggle to comments
// @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 */
/* jshint esnext:true, unused:true */
(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
*/
let busy = false;
const icon = `
<svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewbox="0 0 32 32">
<path d="M5.91 7.31v8.41c0 .66.05 1.09.14 1.31.09.21.23.37.41.48.18.11.52.16 1.02.16v.41H2.41v-.41c.5 0 .86-.05 1.03-.14.16-.11.3-.27.41-.5.11-.23.16-.66.16-1.3V11.7c0-1.14-.04-1.87-.11-2.2-.04-.26-.13-.42-.24-.53-.11-.1-.27-.14-.46-.14-.21 0-.48.05-.77.18l-.18-.41 3.14-1.28h.52v-.01zm-.95-5.46c.32 0 .59.11.82.34.23.23.34.5.34.82 0 .32-.11.59-.34.82-.23.22-.51.34-.82.34-.32 0-.59-.11-.82-.34s-.36-.5-.36-.82c0-.32.11-.59.34-.82.24-.23.51-.34.84-.34zm19.636 19.006h-3.39v-1.64h5.39v9.8h3.43v1.66h-9.18v-1.66h3.77v-8.16h-.02zm.7-6.44c.21 0 .43.04.63.13.18.09.36.2.5.34s.25.3.34.5c.07.18.13.39.13.61 0 .22-.04.41-.13.61s-.19.36-.34.5-.3.25-.5.32c-.2.09-.39.13-.62.13-.21 0-.43-.04-.61-.12-.19-.07-.35-.19-.5-.34-.14-.14-.25-.3-.34-.5-.07-.2-.13-.39-.13-.61s.04-.43.13-.61c.07-.18.2-.36.34-.5s.31-.25.5-.34c.17-.09.39-.12.6-.12zM2 30L27.82 2H30L4.14 30H2z"/>
</svg>
`;
// Add monospace font toggle
function addMonospaceToggle() {
busy = true;
const button = document.createElement("button");
button.type = "button";
button.className = "ghd-monospace toolbar-item tooltipped tooltipped-n";
button.setAttribute("aria-label", "Toggle monospaced font");
button.setAttribute("tabindex", "-1");
button.innerHTML = icon;
Array.from(
document.querySelectorAll(".toolbar-commenting")
).forEach(el => {
if (el && !el.querySelector(".ghd-monospace")) {
el.insertBefore(button.cloneNode(true), el.childNodes[0]);
}
});
busy = false;
}
function closest(el, selector) {
while (el && el.nodeName !== "BODY" && !el.matches(selector)) {
el = el.parentNode;
}
return el && el.matches(selector) ? el : [];
}
function addBindings() {
document.querySelector("body").addEventListener("click", function(event) {
var textarea, active,
target = event.target;
if (target && target.classList.contains("ghd-monospace")) {
textarea = closest(target, ".previewable-comment-form");
textarea = textarea.querySelector(".comment-form-textarea");
textarea.classList.toggle("ghd-monospace-font");
textarea.focus();
active = textarea.classList.contains("ghd-monospace-font");
target.classList[active ? "add" : "remove"]("text-blue");
return false;
}
});
}
// don't initialize if GitHub Dark Script is active
if (!document.querySelector("#ghd-menu")) {
// monospace font toggle
GM_addStyle(`
.ghd-monospace-font { font-family: Menlo, Inconsolata, "Droid Mono",
monospace !important; font-size: 1em !important; }
.ghd-monospace > svg { pointer-events: none; }
`);
Array.from(
document.querySelectorAll(`
#js-repo-pjax-container,
#js-pjax-container,
.js-preview-body
`)
).forEach(target => {
new MutationObserver(mutations => {
mutations.forEach(mutation => {
if (!busy && mutation.target === target) {
addMonospaceToggle();
}
});
}).observe(target, {
childList: true,
subtree: true
});
});
addBindings();
addMonospaceToggle();
}
})();