scroll/src/deno/terminal_io.ts

import { ITerminalIO, ITerminalSize } from '../common/types.ts';

const DenoTerminalIO: ITerminalIO = {
	/**
	 * Wrap the runtime-specific hook into stdin
	 */
	inputLoop: async function* inputLoop(): AsyncGenerator<
		Uint8Array,
		void,
		unknown
	> {
		for await (const chunk of Deno.stdin.readable) {
			yield chunk;
		}
	},
	getSize: function getSize(): ITerminalSize {
		const size: { rows: number; columns: number } = Deno.consoleSize();

		return {
			rows: size.rows,
			cols: size.columns,
		};
	},
	write: async function write(s: string): Promise<void> {
		const buffer = new TextEncoder().encode(s);

		const stdout = Deno.stdout.writable.getWriter();
		await stdout.write(buffer);
		stdout.releaseLock();
	},
};

export default DenoTerminalIO;