Smart Text Justifier

Justifies p and textarea tags unless they (or their parents) are centered.

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         Smart Text Justifier
// @namespace    http://tampermonkey.net/
// @version      1.3
// @description  Justifies p and textarea tags unless they (or their parents) are centered.
// @author       Ȼaptain Jøhn “Søap” MacTavish
// @license      CC-BY-NC-SA-4.0
// @match        *://*/*
// @grant        none
// ==/UserScript==

(
    function()
    {
        'use strict';
    
        const JustifyTargetElements = () =>
        {
            const TargetNodes = document.querySelectorAll('p, textarea');
    
            TargetNodes.forEach
            (
                Element =>
                {
                    // Check the actual computed alignment from CSS or attributes
                    const ComputedAlignment = window.getComputedStyle(Element).textAlign;
    
                    // Only apply justification if the element is NOT centered
                    if (ComputedAlignment !== 'center')
                    {
                        Element.style.setProperty('text-align', 'justify', 'important');
                        Element.style.setProperty('text-justify', 'inter-word', 'important');
                    }
                }
            );
        };
    
        const InitializeObserver = () =>
        {
            // Initial run
            JustifyTargetElements();
    
            // Observe the body for dynamically loaded content (AJAX, infinite scroll)
            const ContentObserver = new MutationObserver
            (
                () =>
                {
                    JustifyTargetElements();
                }
            );
    
            ContentObserver.observe
            (
                document.body,
                {
                    childList: true,
                    subtree: true
                }
            );
        };
    
        // Run the script once the window is stable
        if (document.readyState === 'complete')
        {
            InitializeObserver();
        }
        else
        {
            window.addEventListener('load', InitializeObserver);
        }
    
    }
)();