Jira touch scroll

Someone had to do it... Atlassian, please fix.

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

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

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

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

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

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.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Jira touch scroll
// @namespace    http://tampermonkey.net/
// @version      0.1
// @license      MIT
// @description  Someone had to do it... Atlassian, please fix.
// @author       Creta Park
// @match        https://*.atlassian.net/jira/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=atlassian.net
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    //Smoothness of swiping gesture for scroll.
    let swipeSmoothness = 4;

    swipeSmoothness = 1 + (1 / swipeSmoothness);
    if (swipeSmoothness < 0)
        swipeSmoothness = NaN;

    function addTouchScrolling(element) {
        let startY;
        let deltaY;
        let swipeID = 0;

        element.addEventListener("touchstart", (e) => {
            clearTimeout(swipeID);
            e.preventDefault();
            startY = e.touches[0].clientY;
        });

        element.addEventListener("touchmove", (e) => {
            deltaY = startY - e.touches[0].clientY;
            element.scrollTop += deltaY;
            startY = e.touches[0].clientY;
        });

        element.addEventListener("touchend", (e) => {
            if (!isNaN(swipeSmoothness))
                swipeID = setTimeout(swipeScroll, 16, deltaY);
        });

        function swipeScroll(deltaY) {
            element.scrollTop += deltaY;
            swipeID = setTimeout(swipeScroll, 16, deltaY / swipeSmoothness);
        }
    }
    
    //TODO : Maybe better use MutationObserver, but I have no time for doing it...
    //       This trying registers touch event for these each second.
    var registered = [];

    setInterval(() => {

        var list = Array.from(document.querySelectorAll('[data-component-selector*="full-size-mode-column"]'));

        for (var el of list) {

            if (registered.includes(el))
                continue;

            registered.push(el);
            addTouchScrolling(el.parentElement);
        }

    }, 1000);

    console.log("Confluence story touch scroll enabled.");
})();