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Adds a togglable markdown editor to (old) reddit.
// ==UserScript==
// @name Old Reddit Markdown Editor
// @description Adds a togglable markdown editor to (old) reddit.
// @author Arxk
// @namespace https://gist.github.com/Arxk/7ebc8c0118773c7e94ac842544d081fa
// @homepageURL https://github.com/Arxk/scripts
// @license MIT
// @version 1.0
// @match http*://*.reddit.com/*
// @require https://cdn.jsdelivr.net/simplemde/latest/simplemde.min.js
// @resource simplemdeCSS https://cdn.jsdelivr.net/simplemde/latest/simplemde.min.css
// @grant GM_addStyle
// @grant GM_getResourceText
// ==/UserScript==
// ==OpenUserJS==
// @author Arxk
// ==/OpenUserJS==
const newCSS = GM_getResourceText("simplemdeCSS");
GM_addStyle(newCSS);
/**
* Declare insertionQ function to detect created DOM elements
* https://github.com/naugtur/insertionQuery
*
* insertion-query v1.0.3 (2016-01-20)
* license:MIT
* Zbyszek Tenerowicz <[email protected]> (http://naugtur.pl/)
*/
var insertionQ = (function () {
"use strict";
var sequence = 100,
isAnimationSupported = false,
animationstring = 'animationName',
keyframeprefix = '',
domPrefixes = 'Webkit Moz O ms Khtml'.split(' '),
pfx = '',
elm = document.createElement('div'),
options = {
strictlyNew: true,
timeout: 20
};
if (elm.style.animationName) {
isAnimationSupported = true;
}
if (isAnimationSupported === false) {
for (var i = 0; i < domPrefixes.length; i++) {
if (elm.style[domPrefixes[i] + 'AnimationName'] !== undefined) {
pfx = domPrefixes[i];
animationstring = pfx + 'AnimationName';
keyframeprefix = '-' + pfx.toLowerCase() + '-';
isAnimationSupported = true;
break;
}
}
}
function listen(selector, callback) {
var styleAnimation, animationName = 'insQ_' + (sequence++);
var eventHandler = function (event) {
if (event.animationName === animationName || event[animationstring] === animationName) {
if (!isTagged(event.target)) {
callback(event.target);
}
}
};
styleAnimation = document.createElement('style');
styleAnimation.innerHTML = '@' + keyframeprefix + 'keyframes ' + animationName + ' { from { outline: 1px solid transparent } to { outline: 0px solid transparent } }' +
"\n" + selector + ' { animation-duration: 0.001s; animation-name: ' + animationName + '; ' +
keyframeprefix + 'animation-duration: 0.001s; ' + keyframeprefix + 'animation-name: ' + animationName + '; ' +
' } ';
document.head.appendChild(styleAnimation);
var bindAnimationLater = setTimeout(function () {
document.addEventListener('animationstart', eventHandler, false);
document.addEventListener('MSAnimationStart', eventHandler, false);
document.addEventListener('webkitAnimationStart', eventHandler, false);
//event support is not consistent with DOM prefixes
}, options.timeout); //starts listening later to skip elements found on startup. this might need tweaking
return {
destroy: function () {
clearTimeout(bindAnimationLater);
if (styleAnimation) {
document.head.removeChild(styleAnimation);
styleAnimation = null;
}
document.removeEventListener('animationstart', eventHandler);
document.removeEventListener('MSAnimationStart', eventHandler);
document.removeEventListener('webkitAnimationStart', eventHandler);
}
};
}
function tag(el) {
el.QinsQ = true; //bug in V8 causes memory leaks when weird characters are used as field names. I don't want to risk leaking DOM trees so the key is not '-+-' anymore
}
function isTagged(el) {
return (options.strictlyNew && (el.QinsQ === true));
}
function topmostUntaggedParent(el) {
if (isTagged(el.parentNode) || el.nodeName === 'BODY') {
return el;
} else {
return topmostUntaggedParent(el.parentNode);
}
}
function tagAll(e) {
if (!e) { return; }
tag(e);
e = e.firstChild;
for (; e; e = e.nextSibling) {
if (e !== undefined && e.nodeType === 1) {
tagAll(e);
}
}
}
//aggregates multiple insertion events into a common parent
function catchInsertions(selector, callback) {
var insertions = [];
//throttle summary
var sumUp = (function () {
var to;
return function () {
clearTimeout(to);
to = setTimeout(function () {
insertions.forEach(tagAll);
callback(insertions);
insertions = [];
}, 10);
};
})();
return listen(selector, function (el) {
if (isTagged(el)) {
return;
}
tag(el);
var myparent = topmostUntaggedParent(el);
if (insertions.indexOf(myparent) < 0) {
insertions.push(myparent);
}
sumUp();
});
}
//insQ function
var exports = function (selector) {
if (isAnimationSupported && selector.match(/[^{}]/)) {
if (options.strictlyNew) {
tagAll(document.body); //prevents from catching things on show
}
return {
every: function (callback) {
return listen(selector, callback);
},
summary: function (callback) {
return catchInsertions(selector, callback);
}
};
} else {
return false;
}
};
//allows overriding defaults
exports.config = function (opt) {
for (var o in opt) {
if (opt.hasOwnProperty(o)) {
options[o] = opt[o];
}
}
};
return exports;
})();
if (typeof module !== 'undefined' && typeof module.exports !== 'undefined') {
module.exports = insertionQ;
}
/**
*
* HTML String to DOM Element
*
*/
var htmlToElement = function (html) {
var template = document.createElement('template');
template.innerHTML = html.trim();
return template.content.firstChild;
};
/**
* Create Markdown Editor Toggle
*/
const toggleEditor = function(editor, enable = true) {
if (editor.querySelector('.editor-toggle') === null) {
editor.querySelector('.bottom-area').insertBefore(htmlToElement('<a class="editor-toggle reddiquette" style="cursor: pointer;">toggle editor</a>'), editor.querySelector('.bottom-area .help-toggle'));
}
const toggle = editor.querySelector('.editor-toggle');
toggle.onclick = function (e) {
const editor = e.target.parentNode.parentNode;
const textarea = editor.querySelector('.md textarea');
if (textarea.simplemde === undefined) {
const simplemde = new SimpleMDE({
element: textarea,
showIcons: ['code', 'table'],
hideIcons: ['image', 'side-by-side', 'fullscreen', 'guide']
});
textarea.simplemde = simplemde;
} else {
textarea.simplemde.toTextArea();
textarea.simplemde = undefined;
}
}
if (enable) {
toggle.click();
}
}
/**
* Appends Toggle button to comments
*/
insertionQ('.comment .usertext-edit').every((editor) => {
const post = document.querySelector('.commentarea > .usertext > .usertext-edit');
if (post !== null) {
const comment = post.querySelector('.md textarea');
if (comment.simplemde !== undefined) {
const removeElements = (elms) => elms.forEach(el => el.remove());
const textarea = editor.querySelector(".md textarea");
textarea.value = '';
textarea.style.display = 'block';
removeElements(editor.querySelectorAll(".md div"));
}
}
toggleEditor(editor);
const cancel = editor.querySelector('.bottom-area > .usertext-buttons .cancel');
const listener = cancel.addEventListener('click', (e) => {
const editor = e.target.parentNode.parentNode.parentNode;
const textarea = editor.querySelector('.md textarea');
if (textarea.simplemde !== undefined) {
textarea.value = '';
textarea.simplemde.toTextArea();
textarea.simplemde = undefined;
}
}, { once: true });
});
/**
* Appends Toggle button to View post & New post
*/
addEventListener('load', () => {
const post = document.querySelector('.commentarea > .usertext > .usertext-edit');
if (post !== null) {
toggleEditor(post, false);
}
const create = document.querySelector('.roundfield-content > .usertext > .usertext-edit');
if (create !== null) {
toggleEditor(create, false);
}
});