// ==UserScript==
// @name         Notion.so RTL support for written text
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Changes dir attribute of page's div elements to 'auto' and forcing text aligning styles on selectable blocks
// @author       OrenK
// @include      https://www.notion.so/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    var GM_addStyle =
        function(css) {
            var style = document.getElementById("GM_addStyleBy8626") || (function() {
                var style = document.createElement('style');
                style.type = 'text/css';
                style.id = "GM_addStyleBy8626";
                document.head.appendChild(style);
                return style;
            })();
            var sheet = style.sheet;
            sheet.insertRule(css, (sheet.rules || sheet.cssRules || []).length);
        };

    GM_addStyle(".notion-selectable * { text-align: start !important; unicode-bidi: plaintext;}");
    GM_addStyle(".notion-selectable.notion-to_do-block > div > div:nth-of-type(2) { margin-right: 4px !important; }");

    var observing = false;
    var hasClass = function(element, className) {
        return (' ' + element.className + ' ').indexOf(' ' + className + ' ') > -1;
    };
    var notionPageCallback = function(mutations, observer) {
        for (var i = 0; i < mutations.length; i++) {
            for (var j = 0; j < mutations[i].addedNodes.length; j++) {

                var addedNode = mutations[i].addedNodes[j];
                if (addedNode.nodeType === Node.ELEMENT_NODE) {
                    if (addedNode.tagName === 'DIV' && hasClass(addedNode, 'notion-selectable')) {
                        addedNode.setAttribute('dir', 'auto');
                    }
                    var divChildren = addedNode.getElementsByClassName('notion-selectable');
                    for (var y = 0; y < divChildren.length; y++) {
                        divChildren[y].setAttribute('dir', 'auto');
                    }
                }
            }
        }
    };
    var documentCallback = function(mutations, observer) {
        var notionPage = document.getElementsByClassName('notion-page-content');
        if (notionPage.length !== 0 && !observing) {
            var divElements = notionPage[0].getElementsByClassName('notion-selectable');
            for (var i = 0; i < divElements.length; i++) {
                divElements[i].setAttribute('dir', 'auto');
            }
            notionPageObserver.observe(notionPage[0], { subtree: true, childList: true });
            observing = true;

        }
        if (notionPage.length === 0 && observing) {
            notionPageObserver.disconnect();
            observing = false;
        }
    };
    var notionPageObserver = new MutationObserver(notionPageCallback);
    var documentObserver = new MutationObserver(documentCallback);

    documentObserver.observe(document, {
        subtree: true,
        childList: true
    });
})();