Added WebView2 wrapper and threadsafe postWebMessageAsJson (#1941)

MobiFlight/BrowserMessages/Publisher/PostMessagePublisher.cs

@@ -1,15 +1,16 @@
 using Microsoft.Web.WebView2.Core;
 using Newtonsoft.Json;
 using System;
+using System.Threading;
 
 namespace MobiFlight.BrowserMessages.Publisher
 {
     public class PostMessagePublisher : IMessagePublisher
     {
-        private readonly CoreWebView2 _webView;
+        private readonly ThreadSafeWebView2 _webView;
         private Action<object> _onMessageReceived;
 
-        public PostMessagePublisher(CoreWebView2 webView)
+        public PostMessagePublisher(ThreadSafeWebView2 webView)
         {
             _webView = webView;
             _webView.WebMessageReceived += WebView_WebMessageReceived;
@@ -21,7 +22,8 @@ public void Publish<TEvent>(TEvent eventToPublish)
             {
                 var message = new Message<TEvent>() { key = eventToPublish.GetType().Name, payload = eventToPublish };
                 var jsonMessage = JsonConvert.SerializeObject(message);
-                _webView.PostWebMessageAsJson(jsonMessage);
+                // Ensure the call is made on the UI thread
+                _webView.PostWebMessageAsJsonThreadSafe(jsonMessage);
             }
         }
 

MobiFlight/ThreadSafeWebView2.cs

@@ -0,0 +1,20 @@
+using Microsoft.Web.WebView2.WinForms;
+using System;
+
+namespace MobiFlight
+{
+    public class ThreadSafeWebView2 : WebView2
+    {
+        public void PostWebMessageAsJsonThreadSafe(string jsonMessage)
+        {
+            if (this.InvokeRequired)
+            {
+                this.Invoke(new Action(() => CoreWebView2.PostWebMessageAsJson(jsonMessage)));
+            }
+            else
+            {
+                CoreWebView2.PostWebMessageAsJson(jsonMessage);
+            }
+        }
+    }
+}

MobiFlightConnector.csproj

@@ -370,6 +370,9 @@
     <Compile Include="MobiFlight\OutputConfig\SimConnectValue.cs" />
     <Compile Include="HubHop\Msfs2020HubhopPresetList.cs" />
     <Compile Include="MobiFlight\PortDetails.cs" />
+    <Compile Include="MobiFlight\ThreadSafeWebView2.cs">
+      <SubType>Component</SubType>
+    </Compile>
     <Compile Include="SimConnectMSFS\SimConnectCacheInterface.cs" />
     <Compile Include="SimConnectMSFS\WasmModuleClient.cs" />
     <Compile Include="SimConnectMSFS\SimConnectDefinitions.cs" />

UI/Panels/FrontendPanel.cs

@@ -47,7 +47,7 @@ async void InitializeAsync()
             FrontendWebView.CoreWebView2.WebMessageReceived += CoreWebView2_WebMessageReceived;
             FrontendWebView.CoreWebView2.DOMContentLoaded += CoreWebView2_DOMContentLoaded;
 
-            MessageExchange.Instance.SetPublisher(new PostMessagePublisher(FrontendWebView.CoreWebView2));
+            MessageExchange.Instance.SetPublisher(new PostMessagePublisher(FrontendWebView));
         }
 
         private void CoreWebView2_DOMContentLoaded(object sender, CoreWebView2DOMContentLoadedEventArgs e)