Class ProcessTerminal

packages/pi-tui/src/terminal.ts:99–531

 * Real terminal using process.stdin/stdout
 */
export class ProcessTerminal implements Terminal {
	private wasRaw = false;
	private inputHandler?: (data: string) => void;
	private resizeHandler?: () => void;
	private _kittyProtocolActive = false;
	private _modifyOtherKeysActive = false;
	private keyboardProtocolPushed = false;
	private keyboardProtocolNegotiationBuffer = "";
	private keyboardProtocolBufferFlushTimer?: ReturnType<typeof setTimeout>;
	private stdinBuffer?: StdinBuffer;
	private stdinDataHandler?: (data: string) => void;
	private progressInterval?: ReturnType<typeof setInterval>;
	private writeLogPath = (() => {
		const env = process.env['PI_TUI_WRITE_LOG'] || "";
		if (!env) return "";
		try {
			if (fs.statSync(env).isDirectory()) {
				const now = new Date();
				const ts = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, "0")}-${String(now.getDate()).padStart(2, "0")}_${String(now.getHours()).padStart(2, "0")}-${String(now.getMinutes()).padStart(2, "0")}-${String(now.getSeconds()).padStart(2, "0")}`;
				return path.join(env, `tui-${ts}-${process.pid}.log`);
			}
		} catch {
			// Not an existing directory - use as-is (file path)
		}
		return env;
	})();

	get kittyProtocolActive(): boolean {
		return this._kittyProtocolActive;
	}

	get modifyOtherKeysActive(): boolean {
		return this._modifyOtherKeysActive;
	}

	start(onInput: (data: string) => void, onResize: () => void): void {
		this.inputHandler = onInput;
		this.resizeHandler = onResize;

		// Save previous state and enable raw mode
		this.wasRaw = process.stdin.isRaw || false;
		if (process.stdin.setRawMode) {
			process.stdin.setRawMode(true);
		}
		process.stdin.setEncoding("utf8");
		process.stdin.resume();

		// Enable bracketed paste mode - terminal will wrap pastes in \x1b[200~ ... \x1b[201~
		process.stdout.write("\x1b[?2004h");

		// Set up resize handler immediately
		process.stdout.on("resize", this.resizeHandler);

		// Refresh terminal dimensions - they may be stale after suspend/resume
		// (SIGWINCH is lost while process is stopped). Unix only.
		if (process.platform !== "win32") {
			process.kill(process.pid, "SIGWINCH");
		}