fix closing PortForward page while closing msgbox

Signed-off-by: 21pages <pages21@163.com>

flutter/lib/common.dart

@@ -27,6 +27,7 @@ var isWeb = false;
 var isWebDesktop = false;
 var version = "";
 int androidVersion = 0;
+late final DesktopType? desktopType;
 
 typedef F = String Function(String);
 typedef FMethod = String Function(String, dynamic);
@@ -42,6 +43,15 @@ late final iconFile = MemoryImage(Uint8List.fromList(base64Decode(
 late final iconRestart = MemoryImage(Uint8List.fromList(base64Decode(
     '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')));
 
+enum DesktopType {
+  main,
+  remote,
+  fileTransfer,
+  cm,
+  portForward,
+  rdp,
+}
+
 class IconFont {
   static const _family1 = 'Tabbar';
   static const _family2 = 'PeerSearchbar';
@@ -478,7 +488,9 @@ void msgBox(
   submit() {
     dialogManager.dismissAll();
     // https://github.com/fufesou/rustdesk/blob/5e9a31340b899822090a3731769ae79c6bf5f3e5/src/ui/common.tis#L263
-    if (!type.contains("custom")) {
+    if (!type.contains("custom") &&
+        !(desktopType == DesktopType.portForward ||
+            desktopType == DesktopType.rdp)) {
       closeConnection();
     }
   }

flutter/lib/main.dart

@@ -43,12 +43,16 @@ Future<Null> main(List<String> args) async {
     WindowType wType = type.windowType;
     switch (wType) {
       case WindowType.RemoteDesktop:
+        desktopType = DesktopType.remote;
         runRemoteScreen(argument);
         break;
       case WindowType.FileTransfer:
+        desktopType = DesktopType.fileTransfer;
         runFileTransferScreen(argument);
         break;
       case WindowType.PortForward:
+        desktopType =
+            argument['isRDP'] ? DesktopType.rdp : DesktopType.portForward;
         runPortForwardScreen(argument);
         break;
       default:
@@ -56,9 +60,11 @@ Future<Null> main(List<String> args) async {
     }
   } else if (args.isNotEmpty && args.first == '--cm') {
     print("--cm started");
+    desktopType = DesktopType.cm;
     await windowManager.ensureInitialized();
     runConnectionManagerScreen();
   } else {
+    desktopType = DesktopType.main;
     await windowManager.ensureInitialized();
     windowManager.setPreventClose(true);
     runMainApp(true);