ChatGPT fix for missing caret

Fixes ChatGPT bug where caret disappears after pasting CRLF-based newlines (Windows standard); converts CRLF to LF and pastes properly in ChatGPT ProseMirror editor

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         ChatGPT fix for missing caret
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Fixes ChatGPT bug where caret disappears after pasting CRLF-based newlines (Windows standard); converts CRLF to LF and pastes properly in ChatGPT ProseMirror editor
// @license      MIT
// @match        https://chat.openai.com/*
// @match        https://chatgpt.com/*
// @grant        none
// @homepage     https://greasyfork.org/en/scripts/559039/
// ==/UserScript==

(function ()
{
    'use strict';

    document.addEventListener('paste', function (event)
    {
        const target = event.target;
        if (!(target instanceof HTMLElement)) return;

        const prosemirror = target.closest('.ProseMirror');
        if (!prosemirror) return;

        const clipdata = event.clipboardData;
        if (!clipdata) return;

        const text = clipdata.getData('text/plain');
        if (!text || !text.includes('\r\n')) return;

        event.preventDefault();

        const normalized = text.replace(/\r\n?/g, '\n');
        const datatransfer = new DataTransfer();
        datatransfer.setData('text/plain', normalized);

        const syntheticpaste = new ClipboardEvent('paste',
        {
            clipboardData: datatransfer,
            bubbles: true,
            cancelable: true
        });

        target.dispatchEvent(syntheticpaste);
    }, true);
})();