Handle mailto links properly (#1983)

* handle mailto links propertly

* improve mailto link handling by using case-insensitive comparison for URL scheme

Author: hahn-kev

backend/FwLite/FwLiteMaui/MainPage.xaml.Android.cs

@@ -1,5 +1,6 @@
 #if ANDROID
 
+using Android.Content;
 using AndroidX.Activity;
 using FwLiteMaui.Platforms.Android;
 using Microsoft.AspNetCore.Components.WebView;
@@ -34,6 +35,17 @@ private partial void BlazorWebViewInitialized(object? sender, BlazorWebViewIniti
         e.WebView.Settings.SetGeolocationDatabasePath(e.WebView.Context?.FilesDir?.Path);
         e.WebView.SetWebChromeClient(new PermissionManagingBlazorWebChromeClient(e.WebView.WebChromeClient!, activity));
     }
+
+    private partial void BlazorWebViewOnUrlLoading(object? sender, UrlLoadingEventArgs e)
+    {
+        if ("mailto".Equals(e.Url?.Scheme, StringComparison.OrdinalIgnoreCase))
+        {
+            var intent = new Intent(action: Intent.ActionSendto, Android.Net.Uri.Parse(e.Url.ToString()));
+            intent.AddFlags(ActivityFlags.NewTask);
+            Platform.AppContext.StartActivity(intent);
+            e.UrlLoadingStrategy = UrlLoadingStrategy.CancelLoad;
+        }
+    }
 }
 
 #endif

backend/FwLite/FwLiteMaui/MainPage.xaml.cs

@@ -12,8 +12,11 @@ public MainPage()
         InitializeComponent();
         blazorWebView.BlazorWebViewInitializing += BlazorWebViewInitializing;
         blazorWebView.BlazorWebViewInitialized += BlazorWebViewInitialized;
+        blazorWebView.UrlLoading += BlazorWebViewOnUrlLoading;
     }
 
+
+
     internal string StartPath
     {
         get => blazorWebView.StartPath;
@@ -32,4 +35,14 @@ private void BlazorWebViewInitialized(object? sender, BlazorWebViewInitializedEv
     {
     }
 #endif
+
+#if ANDROID
+    private partial void BlazorWebViewOnUrlLoading(object? sender, UrlLoadingEventArgs e);
+#else
+
+    private void BlazorWebViewOnUrlLoading(object? sender, UrlLoadingEventArgs e)
+    {
+    }
+
+#endif
 }

frontend/viewer/src/lib/about/FeedbackDialog.svelte

@@ -35,7 +35,8 @@
           </div>
         </div>
       </Button>
-      <Button variant="ghost" href={mailtoUrl} class="gap-4 p-4 h-auto text-base justify-start whitespace-normal">
+<!--      need to use external because of how android handles links, if it's target _blank then the Blazor UrlLoading event will not fire-->
+      <Button variant="ghost" href={mailtoUrl} external class="gap-4 p-4 h-auto text-base justify-start whitespace-normal">
         <Icon icon="i-mdi-email-outline" class="size-10"/>
         <div>
           <div class="font-semibold underline">