scroll/src/bun/terminal_io.ts

/**
 * Wrap the runtime-specific hook into stdin
 */
import { ITerminalIO, ITerminalSize } from '../common/mod.ts';

function getSizeFromTput(): ITerminalSize {
	const rows = parseInt(
		Bun.spawnSync(['tput', 'lines']).stdout.toString().trim(),
		10,
	);
	const cols = parseInt(
		Bun.spawnSync(['tput', 'cols']).stdout.toString().trim(),
		10,
	);

	return {
		rows: (rows > 0) ? rows : 25,
		cols: (cols > 0) ? cols : 80,
	};
}

const BunTerminalIO: ITerminalIO = {
	inputLoop: async function* inputLoop() {
		for await (const chunk of Bun.stdin.stream()) {
			yield chunk;
		}
	},
	getSize: function getSize(): ITerminalSize {
		return getSizeFromTput();
	},
	write: async function write(s: string): Promise<void> {
		const buffer = new TextEncoder().encode(s);

		await Bun.write(Bun.stdout, buffer);
	},
};

export default BunTerminalIO;