ChatGPT Copy Cleaner

chatgpt-copy-cleaner.js

// ==UserScript==
// @name         ChatGPT Copy Cleaner
// @namespace    http://tampermonkey.net/
// @version      2025-08-06
// @description  Cleans text copied from ChatGPT
// @author       Thinh Nguyen
// @match        https://chat.openai.com/*
// @match        https://chatgpt.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=openai.com
// @run-at       document-end
// ==/UserScript==

(() => {

	/* ───────── Config ───────── */
	const BUTTON_COPY_DELAY = 60; // ms – delay before we patch the clipboard
	const COPY_BUTTON_SELECTOR = 'button[aria-label="Copy"],button[data-testid="copy-turn-action-button"]'; // Centralized selector

	/* ───────── Utils ───────── */
	// Invisible/control characters to strip entirely
	const INVISIBLES = /[\u00AD\u180E\u200B-\u200D\u2060-\u2064\u2066-\u206F\u200E\u200F\u202A-\u202E\uFEFF]/g;
	const VARIATION_SELECTORS = /[\uFE00-\uFE0F]/g;

	// Exotic spaces to normalize to regular space
	const EXOTIC_SPACES = /[\u00A0\u1680\u2000-\u200A\u202F\u205F\u3000]/g;

	// All dash/hyphen variants to normalize to regular hyphen
	const DASHES = /[‐-‒–—―⁃−﹣－]/g;

	// Smart quotes to normalize to ASCII quotes
	const CURLY_SINGLE = /[''‚‛]/g;
	const CURLY_DOUBLE = /[""„‟]/g;

	// Ellipsis to normalize to three dots
	const ELLIPSIS = /\u2026/g;

	const filterText = t => {
		// Guard against very large strings to prevent freezing
		if (!t || typeof t !== 'string' || t.length > 1000000) return t;

		return t
			.replace(INVISIBLES, '')
			.replace(VARIATION_SELECTORS, '')
			.replace(EXOTIC_SPACES, ' ')
			.replace(DASHES, '-')
			.replace(CURLY_SINGLE, "'")
			.replace(CURLY_DOUBLE, '"')
			.replace(ELLIPSIS, '...')
			.replace(/ {2,}/g, ' '); // Collapse multiple spaces
	};
	const unchanged = (a, b) => a === b; // fast equality

	/* ───────── Logging ───────── */
	const log = (raw, clean, origin) => {
		if (unchanged(raw, clean)) return;
		console.log(`[ChatGPT-CC] COPY (${origin})\n  raw   : ${JSON.stringify(raw)}\n  clean : ${JSON.stringify(clean)}`);
	};

	/* ───────── Toast ───────── */
	const showToast = (() => {
		let toastElement = null;
		let fadeTimer = null;
		let removeTimer = null;

		return (message = 'Clipboard cleaned') => {
			// Create toast element only once
			if (!toastElement) {
				toastElement = document.createElement('div');
				Object.assign(toastElement.style, {
					position: 'fixed',
					top: '12px',
					left: '50%',
					transform: 'translateX(-50%)',
					background: '#2ecc71',
					color: '#fff',
					padding: '6px 12px',
					borderRadius: '6px',
					fontSize: '14px',
					fontWeight: '600',
					zIndex: 2147483647,
					boxShadow: '0 2px 6px rgba(0,0,0,.2)',
					opacity: '0',
					transition: 'opacity .3s ease'
				});
				document.body.appendChild(toastElement);
			}

			// Clear existing timers
			clearTimeout(fadeTimer);
			clearTimeout(removeTimer);

			// Update content and show
			toastElement.textContent = message;
			toastElement.style.opacity = '1';

			// Schedule fade and hide
			fadeTimer = setTimeout(() => { toastElement.style.opacity = '0' }, 1300);
		};
	})();

	/* ───────── Selection helper ───────── */
	const getSelectionText = () => {
		const sel = window.getSelection();
		if (sel?.toString()) return sel.toString();

		const el = document.activeElement;
		if (el && (el.tagName === 'TEXTAREA' ||
			(el.tagName === 'INPUT' && el.type === 'text'))) {
			return el.value.slice(el.selectionStart, el.selectionEnd);
		}
		return '';
	};

	/* ───────── Clipboard helper ───────── */
	const setClipboardData = (event, text) => {
		event.clipboardData.setData('text/plain', text);
		event.stopImmediatePropagation();
		event.preventDefault();
	};

	/* ───────── Generic copy/cut handler ───────── */
	const onCopyCut = e => {
		const cd = e.clipboardData;
		if (!cd) return;

		// Path 1: page already populated clipboardData
		if (cd.types?.includes('text/plain')) {
			const raw = cd.getData('text/plain');
			const clean = filterText(raw);
			if (unchanged(raw, clean)) return;

			setClipboardData(e, clean);
			log(raw, clean, 'clipboardData');
			showToast();
			return;
		}

		// Path 2: normal selection
		const rawSel = getSelectionText();
		if (!rawSel) return;

		const cleanSel = filterText(rawSel);
		if (unchanged(rawSel, cleanSel)) return;

		setClipboardData(e, cleanSel);
		log(rawSel, cleanSel, 'selection');
		showToast();
	};

	document.addEventListener('copy', onCopyCut, true);
	document.addEventListener('cut', onCopyCut, true);

	/* ───────── “Copy”‑button fallback ───────── */
	document.addEventListener('click', e => {
		const btn = e.target.closest(COPY_BUTTON_SELECTOR);
		if (!btn) return;

		// Retry mechanism for reliable clipboard access
		const attemptClipboardPatch = async (retries = 5, delay = 50) => {
			// Guard against missing clipboard API
			if (!navigator.clipboard) return;

			// Skip if document is not focused to prevent retry loops
			if (!document.hasFocus()) return;

			try {
				const raw = await navigator.clipboard.readText();
				// If clipboard is empty, it might not be ready. Retry.
				if (!raw && retries > 0) {
					setTimeout(() => attemptClipboardPatch(retries - 1, delay), delay);
					return;
				}

				const clean = filterText(raw);
				if (unchanged(raw, clean)) return;

				await navigator.clipboard.writeText(clean);
				log(raw, clean, 'button');
				showToast();
			} catch (err) {
				// Only log error if it's not a permission denied or not focused error
				if (err.name !== 'NotAllowedError' && err.name !== 'DOMException') {
					console.warn('[ChatGPT-CC] Button copy failed:', err);
				}
			}
		};

		// Start the clipboard patching process
		setTimeout(() => attemptClipboardPatch(), BUTTON_COPY_DELAY);
	}, true);
})();