From 9c9589c3b42ee62c92b913d1aaab43d05056c3f6 Mon Sep 17 00:00:00 2001
From: Bill ZHANG <36790218+Lutra-Fs@users.noreply.github.com>
Date: Mon, 23 Sep 2024 16:35:36 +1000
Subject: [PATCH] Add completer to ensure rStart is passed after pty init

---
 lib/r/start.dart | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/r/start.dart b/lib/r/start.dart
index fb0e87df5..104b881f3 100644
--- a/lib/r/start.dart
+++ b/lib/r/start.dart
@@ -26,6 +26,7 @@
 
 library;
 
+import 'dart:async';
 import 'dart:convert';
 
 import 'package:flutter/material.dart';
@@ -99,7 +100,19 @@ void rStart(BuildContext context, WidgetRef ref) async {
   // startup. Seems to have a slight delay on Linux with a all black
   // screen. Let's see what it does on Windows.
 
-  await Future(() {
+  await Future(() async {
+    
+    // Create a Completer to ensure pty is ready before writing to it.
+    Completer<void> ptyReadyCompleter = Completer<void>();
+
+    // Mark the pty as ready after it has been initialized.
+    ref.read(ptyProvider).exitCode.then((_) {
+      ptyReadyCompleter.complete();
+    });
+
+    // extra delay
+    const duration = Duration(seconds: 1);
+    await Future.delayed(duration);
     // Add the code to the script.
 
     updateScript(ref, code);