A userscript that allows you to indent & outdent blocks in the comment editor
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// ==UserScript==
// @name GitHub Indent Comment Blocks
// @version 1.0.1
// @description A userscript that allows you to indent & outdent blocks in the comment editor
// @license https://creativecommons.org/licenses/by-sa/4.0/
// @namespace https://github.com/Mottie
// @include https://github.com/*
// @include https://gist.github.com/*
// @require https://greatest.deepsurf.us/scripts/28239-rangy-inputs-mod-js/code/rangy-inputs-modjs.js?version=181769
// @run-at document-idle
// @grant GM_addStyle
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// @connect github.com
// @author Rob Garrison
// ==/UserScript==
(() => {
"use strict";
let spaceSize = GM_getValue("space-size", 2);
const icons = {
indent: `
<svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="12" height="16" viewBox="0 0 12 16">
<path d="M12 13c0 .6 0 1-.9 1H.9c-.9 0-.9-.4-.9-1s0-1 .9-1h10.2c.88 0 .88.4.88 1zM.92 4h10.2C12 4 12 3.6 12 3s0-1-.9-1H.92c-.9 0-.9.4-.9 1s0 1 .9 1zM11.5 7h-5C6 7 6 7.4 6 8s0 1 .5 1h5c.5 0 .5-.4.5-1s0-1-.5-1zm-7 1L0 5v6z"/>
</svg>`,
outdent: `
<svg class="octicon" xmlns="http://www.w3.org/2000/svg" width="12" height="16" viewBox="0 0 12 16">
<path d="M12 13c0 .6 0 1-.9 1H.9c-.9 0-.9-.4-.9-1s0-1 .9-1h10.2c.88 0 .88.4.88 1zM.92 4h10.2C12 4 12 3.6 12 3s0-1-.9-1H.92c-.9 0-.9.4-.9 1s0 1 .9 1zm10.7 3H6.4c-.46 0-.4.4-.4 1s-.06 1 .4 1h5.2c.47 0 .4-.4.4-1s.07-1-.4-1zM0 8l4.5-3v6z"/>
</svg>`
};
GM_addStyle(".ghio-in-outdent * { pointer-events:none; }");
// Add indent & outdent buttons
function addButtons() {
createButton("Outdent");
createButton("Indent");
}
function createButton(name) {
const toolbars = $$(".toolbar-commenting"),
nam = name.toLowerCase(),
button = document.createElement("button");
let el,
indx = toolbars.length;
if (indx) {
button.type = "button";
button.className = `ghio-${nam.toLowerCase()} ghio-in-outdent toolbar-item tooltipped tooltipped-n`;
button.setAttribute("aria-label", `${name} Selected Text`);
button.setAttribute("tabindex", "-1");
button.innerHTML = icons[nam.toLowerCase()];
while (indx--) {
el = toolbars[indx];
if (!$(`.ghio-${nam.toLowerCase()}`, el)) {
el.insertBefore(button.cloneNode(true), el.childNodes[0]);
}
}
}
}
function indent(text) {
let result = [],
block = new Array(parseInt(spaceSize, 10) + 1).join(" ");
(text || "").split(/\r*\n/).forEach(line => {
result.push(block + line);
});
return result.join("\n");
}
function outdent(text) {
let regex = new RegExp(`^(\x20{1,${spaceSize}}|\xA0{1,${spaceSize}}|\x09)`),
result = [];
(text || "").split(/\r*\n/).forEach(line => {
result.push(line.replace(regex, ""));
});
return result.join("\n");
}
function addBindings() {
window.rangyInput.init();
saveTabSize();
$("body").addEventListener("click", event => {
let textarea,
target = event.target;
if (target && target.classList.contains("ghio-in-outdent")) {
textarea = closest(".previewable-comment-form", target);
textarea = $(".comment-form-textarea", textarea);
textarea.focus();
setTimeout(() => {
window.rangyInput.indentSelectedText(
textarea,
target.classList.contains("ghio-indent") ? indent : outdent
);
}, 100);
return false;
}
});
// Add Tab & Shift + Tab
$("body").addEventListener("keydown", event => {
if (event.key === "Tab") {
let target = event.target;
if (target && target.classList.contains("comment-form-textarea")) {
event.preventDefault();
target.focus();
setTimeout(() => {
window.rangyInput.indentSelectedText(
target,
// shift + tab = outdent
event.getModifierState("Shift") ? outdent : indent
);
}, 100);
}
}
});
}
function saveTabSize() {
let $el = $(".gh-indent-size");
if (!$el) {
$el = document.createElement("style");
$el.setAttribute("rel", "stylesheet");
$el.className = "gh-indent-size";
document.querySelector("head").appendChild($el);
}
$el.innerHTML = `.comment-form-textarea { tab-size:${spaceSize}; }`;
}
function $(selector, el) {
return (el || document).querySelector(selector);
}
function $$(selector, el) {
return Array.from((el || document).querySelectorAll(selector));
}
function closest(selector, el) {
while (el && el.nodeType === 1) {
if (el.matches(selector)) {
return el;
}
el = el.parentNode;
}
return null;
}
// Add GM options
GM_registerMenuCommand(
"Indent or outdent size",
() => {
const spaces = GM_getValue("indentOutdentSize", spaceSize);
let val = prompt("Enter number of spaces to indent or outdent:", spaces);
if (val !== null && typeof val === "string") {
spaceSize = val;
GM_setValue("space-size", val);
saveTabSize();
}
}
);
document.addEventListener("pjax:end", addButtons);
addBindings();
addButtons();
})();