GitHub Monospace Font Toggle

A userscript that adds monospace font toggle to comments

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        GitHub Monospace Font Toggle
// @version     1.2.4
// @description A userscript that adds monospace font toggle to comments
// @license     MIT
// @author      StylishThemes
// @namespace   https://github.com/StylishThemes
// @include     https://github.com/*
// @run-at      document-idle
// @grant       GM_addStyle
// @require     https://greasyfork.org/scripts/28721-mutations/code/mutations.js?version=634242
// @icon        https://avatars3.githubusercontent.com/u/6145677?v=3&s=200
// @homepageURL https://github.com/StylishThemes/GitHub-Dark-Script
// ==/UserScript==
(() => {
  "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
  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() {
    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;
    $$(".toolbar-commenting").forEach(el => {
      if (el && !$(".ghd-monospace", el)) {
        el.insertBefore(button.cloneNode(true), el.childNodes[0]);
      }
    });
  }

  function addBindings() {
    $("body").addEventListener("click", event => {
      let textarea, active;
      const target = event.target;
      if (target && target.classList.contains("ghd-monospace")) {
        textarea = closest(".previewable-comment-form", target);
        textarea = $(".comment-form-textarea", textarea);
        textarea.classList.toggle("ghd-monospace-font");
        textarea.focus();
        active = textarea.classList.contains("ghd-monospace-font");
        target.classList.toggle("text-blue", active);
        return false;
      }
    });
  }

  function $(str, el) {
    return (el || document).querySelector(str);
  }

  function $$(str, el) {
    return Array.from((el || document).querySelectorAll(str));
  }

  function closest(selector, el) {
    while (el && el.nodeType === 1) {
      if (el.matches(selector)) {
        return el;
      }
      el = el.parentNode;
    }
    return null;
  }

  // don't initialize if GitHub Dark Script is active
  if (!$("#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; }
    `);

    document.addEventListener("ghmo:container", addMonospaceToggle);
    document.addEventListener("ghmo:comments", addMonospaceToggle);

    addBindings();
    addMonospaceToggle();
  }
})();