From 9327ec1d5cbd210279a88ae955d4cd69a22e6912 Mon Sep 17 00:00:00 2001
From: James Clarke <james@clarkezone.net>
Date: Sat, 10 Apr 2021 18:29:06 -0700
Subject: [PATCH] Fix interface copying so that it works

---
 .../windows/flutter_windows_winuwp.cc         | 23 +++++++++++++------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/shell/platform/windows/flutter_windows_winuwp.cc b/shell/platform/windows/flutter_windows_winuwp.cc
index b2eac271fce1b..99e826fdc9f78 100644
--- a/shell/platform/windows/flutter_windows_winuwp.cc
+++ b/shell/platform/windows/flutter_windows_winuwp.cc
@@ -57,17 +57,26 @@ FlutterDesktopViewControllerCreateFromCoreWindow(
       std::unique_ptr<flutter::FlutterWindowsEngine>(EngineFromHandle(engine)));
   state->view->CreateRenderSurface();
 
-  winrt::Windows::ApplicationModel::Activation::LaunchActivatedEventArgs
+  winrt::Windows::ApplicationModel::Activation::IActivatedEventArgs
       arg_interface{nullptr};
   winrt::copy_from_abi(arg_interface, args);
 
   std::vector<std::string> engine_switches;
-
-  if (arg_interface != nullptr) {
-    std::string launchargs = winrt::to_string(arg_interface.Arguments());
-    if (!launchargs.empty()) {
-      engine_switches = split(launchargs);
-    }
+  winrt::Windows::ApplicationModel::Activation::LaunchActivatedEventArgs launch{
+      nullptr};
+  switch (arg_interface.Kind()) {
+    case winrt::Windows::ApplicationModel::Activation::ActivationKind::Launch:
+      launch = arg_interface.as<winrt::Windows::ApplicationModel::Activation::
+                                    LaunchActivatedEventArgs>();
+      if (launch != nullptr) {
+        std::string launchargs = winrt::to_string(launch.Arguments());
+        if (!launchargs.empty()) {
+          engine_switches = split(launchargs);
+        }
+      }
+      break;
+    default:
+      break;
   }
 
   state->view->GetEngine()->SetSwitches(engine_switches);