Universal Auto RTL のソースコード

Universal Auto RTL

Automated bi-directional text alignment for smooth Right-to-Left (RTL) languages reading across all websites and AI platforms.

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// ==UserScript==
// @name         Universal Auto RTL
// @namespace    https://greasyfork.org
// @version      3.0.0
// @description  Automated bi-directional text alignment for smooth Right-to-Left (RTL) languages reading across all websites and AI platforms.
// @author       MetaSA
// @license      MIT
// @match        *://*/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    const rtlRegex = /[\u0600-\u06FF\u0750-\u077F\u0590-\u05FF\uFB50-\uFDFF\uFE70-\uFEFF]/;

    function adjustDirection(node) {
        if (!node || node.nodeType !== 1) return;
        if (node.closest('pre, code') || ['PRE', 'CODE', 'SCRIPT', 'STYLE', 'NOSCRIPT'].includes(node.tagName)) return;

        const text = node.textContent ? node.textContent.trim() : '';
        if (!text) return;

        const firstChar = text.charAt(0);
        if (rtlRegex.test(firstChar)) {
            node.style.setProperty('direction', 'rtl', 'important');
            node.style.setProperty('text-align', 'right', 'important');
        } else if (/[a-zA-Z]/.test(firstChar)) {
            node.style.setProperty('direction', 'ltr', 'important');
            node.style.setProperty('text-align', 'left', 'important');
        }
    }

    const observer = new MutationObserver((mutations) => {
        for (let i = 0; i < mutations.length; i++) {
            const mutation = mutations[i];
            if (mutation.type === 'childList') {
                const addedNodes = mutation.addedNodes;
                for (let j = 0; j < addedNodes.length; j++) {
                    const node = addedNodes[j];
                    if (node.nodeType === 1) {
                        if (node.matches('p, span, div, li, h1, h2, h3, h4, h5, h6, textarea, input')) {
                            adjustDirection(node);
                        }
                        const children = node.querySelectorAll('p, span, div, li, h1, h2, h3, h4, h5, h6, textarea, input');
                        for (let k = 0; k < children.length; k++) {
                            adjustDirection(children[k]);
                        }
                    }
                }
            } else if (mutation.type === 'characterData') {
                adjustDirection(mutation.target.parentElement);
            }
        }
    });

    if (document.body) {
        init();
    } else {
        document.addEventListener('DOMContentLoaded', init);
    }

    function init() {
        observer.observe(document.body, {
            childList: true,
            subtree: true,
            characterData: true
        });
        const initialNodes = document.querySelectorAll('p, span, div, li, h1, h2, h3, h4, h5, h6, textarea, input');
        for (let i = 0; i < initialNodes.length; i++) {
            adjustDirection(initialNodes[i]);
        }
    }
})();