WorkFlowy CommonMark live preview

Render a live CommonMark-interpreted preview of WorkFlowy notes: On nodes with a description, preview appears beneath while edit window is limited to a specific height with a scrollbar. Doesn't affect nodes without a description.

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 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             WorkFlowy CommonMark live preview
// @namespace        http://codeoptimism.com/
// @version          1.0
// @description      Render a live CommonMark-interpreted preview of WorkFlowy notes: On nodes with a description, preview appears beneath while edit window is limited to a specific height with a scrollbar. Doesn't affect nodes without a description.
// @author           Christopher Galpin
// @license          MIT
// @contributionURL  https://www.paypal.com/donate/?token=J_EdsnWs02cJRSpntD-QR8w9JFbbUJaSHkgOk_c2tOhWuSPxtH_6OipUutJE07ZnqGZgFG
// @match            https://workflowy.com/
// @grant            GM_addStyle
// @require          https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js
// @require          https://gitcdn.link/cdn/andreyfedoseev/jquery-textareaPreview/342c1059940021f0f7bf84b3898773e7e5e4ec3a/jquery.textareaPreview.min.js
// @require          https://cdnjs.cloudflare.com/ajax/libs/commonmark/0.27.0/commonmark.min.js
// ==/UserScript==

// Uses Andrey Fedoseev's textAreaPreview jQuery plugin: https://github.com/andreyfedoseev/jquery-textareaPreview
// styles shamelessly stolen from http://stackoverflow.com
var styles = `
#cm a:hover,#cm a:active{color:#3af;text-decoration:none}
#cm a{color:#07C;text-decoration:none;cursor:pointer}
#cm blockquote *:last-child{margin-bottom:0}
#cm blockquote,#cm q{quotes:none}
#cm blockquote:before,#cm q:before,#cm blockquote:after,#cm q:after{content:"";content:none}
#cm blockquote{margin-bottom:10px;padding:10px;background-color:#FFF8DC;border-left:2px solid #ffeb8e}
#cm code{font-family:Consolas,Menlo,Monaco,Lucida Console,Liberation Mono,DejaVu Sans Mono,Bitstream Vera Sans Mono,Courier New,monospace,sans-serif;background-color:#eff0f1}
#cm code{font-size:13px}
#cm code{white-space:pre-wrap;padding:1px 5px}
#cm h1 code,#cm h2 code,#cm h3 code,#cm h4 code,#cm h5 code,#cm h6 code{margin-bottom:.5em}
#cm h1,#cm h1 code{font-size:21px}
#cm h1,#cm h2,#cm h3,#cm h4,#cm h5,#cm h6{font-weight:bold !important}
#cm h1,#cm h2,#cm h3{line-height:1.3;margin-bottom:1em;}
#cm h1{font-size:22px}
#cm h2,#cm h2 code{font-size:19px}
#cm h2{font-size:18px}
#cm h3,#cm h3 code{font-size:17px}
#cm h3{font-size:15px}
#cm h4,#cm h4 code{font-size:15px}
#cm hr{background-color:#d6d9dc;color:#d6d9dc}
#cm img{max-width:100%;margin-bottom:.5em}
#cm li blockquote{margin:.5em 0 1em 0}
#cm li pre{margin:.5em 0 1em 0}
#cm li pre{word-wrap:normal}
#cm li>ul,#cm li>ol{padding-top:.5em}
#cm li{word-wrap:break-word}
#cm ol{list-style-type:decimal}
#cm p code{padding:1px 5px}
#cm p img,#cm li img,#cm blockquote img{margin-bottom:0}
#cm p.lead small{display:block;font-size:13px;color:#5e666e}
#cm p.lead{font-size:1.3em;line-height:1.5em}
#cm pre code{white-space:inherit;padding:0}
#cm pre>code:first-child{max-height:600px;display:block}
#cm pre{-ms-word-wrap:normal;word-wrap:normal}
#cm pre{margin-bottom:1em;padding:5px;padding-bottom:20px !ie7;width:auto;width:650px !ie7;max-height:600px;overflow:auto;font-family:Consolas,Menlo,Monaco,Lucida Console,Liberation Mono,DejaVu Sans Mono,Bitstream Vera Sans Mono,Courier New,monospace,sans-serif;font-size:13px;background-color:#eff0f1}
#cm pre{max-height:none}
#cm pre{word-wrap:normal}
#cm p{clear:both;margin-bottom:1em;margin-top:0}
#cm p{font-size:100%}
#cm ul li,#cm ol li{margin-bottom:.5em}
#cm ul li:last-child,#cm ol li:last-child{margin-bottom:0}
#cm ul p:last-of-type,#cm ol p:last-of-type{margin-bottom:0}
#cm ul ul,#cm ol ul,#cm ul ol,#cm ol ol{margin-bottom:0}
#cm ul,#cm ol,#cm li{margin:0;padding:0}
#cm ul,#cm ol{margin-left:30px;margin-bottom:1em}
#cm ul{list-style-type:disc}
#cm{-moz-box-sizing:border-box;-webkit-box-sizing:border-box;box-sizing:border-box;padding:10px 0;border-top:1px dotted #c8ccd0;border-bottom:1px dotted #c8ccd0;clear:both}
#cm{margin-top:-4px}
#cm{width:660px;margin-bottom:5px;word-wrap:break-word;font-size:15px;line-height:1.3}
`;

GM_addStyle(styles);

(function() {
    'use strict';
    var jQuery_1_6_1 = $.noConflict(true);
    var reader = new commonmark.Parser();
    var writer = new commonmark.HtmlRenderer({sourcepos: false, softbreak: '<br />'});

    // explained below
    jQuery_1_6_1.fn.overrideNodeMethod = function(methodName, action) {
        var originalVal = jQuery_1_6_1.fn[methodName];
        var thisNode = this;
        jQuery_1_6_1.fn[methodName] = function() {
            if (this[0] == thisNode[0]) {
                return action.apply(this, arguments);
            } else {
                return originalVal.apply(this, arguments);
            }
        };
    };

    setInterval(function() {
        var $topNote = jQuery_1_6_1("div.selected > div.notes .content");
        if ($topNote.length === 0)
            return;
        if ($topNote.attr('data-hasPreview')) {
            return;
        }

        if (jQuery_1_6_1('#cm').length === 0)
            jQuery_1_6_1('#pageContainer').append("<div id='cm' style='display: none; background-color: white; padding: 30px 60px 10px; width: 820px; margin: 15px auto;'></div>");

        if (!$topNote.text().trim()) {
            jQuery_1_6_1('#cm').css('display', 'none');
            jQuery_1_6_1('#pageContainer > div:first').css({'height': 'auto', 'overflow-y': 'inherit'});
            return;
        }

        jQuery_1_6_1('#cm').css('display', 'inherit');
        jQuery_1_6_1('#pageContainer > div:first').css({'height': '400px', 'overflow-y': 'scroll'});

        // Andrey Fedoseev's textareaPreview expects a textarea, so uses val()
        // but WorkFlowy uses editable div's, so we override val()
        $topNote.overrideNodeMethod('val', function() {
            // needed by CommonMark
            var softSpaced = this.html().replace(/&nbsp;/g, ' ');
            return jQuery_1_6_1("<div/>").html(softSpaced).text();
        });

        $topNote.textareaPreview({
            container: '#cm',
            preprocess: function(text) {
                var parsed = reader.parse(text);
                var result = writer.render(parsed);
                return result;
            }
        });

        $topNote.attr('data-hasPreview', true);
    }, 100);
})();