Enable certain commands only on Windows (#3217)

ILSpy/AppEnv/AppEnvironment.cs

@@ -0,0 +1,9 @@
+using System.Runtime.InteropServices;
+
+namespace ICSharpCode.ILSpy.AppEnv
+{
+	public static class AppEnvironment
+	{
+		public static bool IsWindows => RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+	}
+}

ILSpy/Commands/OpenFromGacCommand.cs

@@ -16,12 +16,19 @@
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
+using ICSharpCode.ILSpy.AppEnv;
 using ICSharpCode.ILSpy.Properties;
+
 namespace ICSharpCode.ILSpy
 {
 	[ExportMainMenuCommand(ParentMenuID = nameof(Resources._File), Header = nameof(Resources.OpenFrom_GAC), MenuIcon = "Images/AssemblyListGAC", MenuCategory = nameof(Resources.Open), MenuOrder = 1)]
 	sealed class OpenFromGacCommand : SimpleCommand
 	{
+		public override bool CanExecute(object parameter)
+		{
+			return AppEnvironment.IsWindows;
+		}
+
 		public override void Execute(object parameter)
 		{
 			OpenFromGacDialog dlg = new OpenFromGacDialog();

ILSpy/Options/MiscSettingsPanel.xaml

@@ -11,7 +11,7 @@
 			<StackPanel Margin="10">
 				<CheckBox IsChecked="{Binding AllowMultipleInstances}" Content="{x:Static properties:Resources.AllowMultipleInstances}" />
 				<CheckBox IsChecked="{Binding LoadPreviousAssemblies}" Content="{x:Static properties:Resources.LoadAssembliesThatWereLoadedInTheLastInstance}"/>
-				<Button Command="{Binding AddRemoveShellIntegrationCommand}" Content="{Binding AddRemoveShellIntegrationText}" Margin="3" />
+				<Button Command="{Binding AddRemoveShellIntegrationCommand}" IsEnabled="{Binding EnableShellIntegrationCommand}" Content="{Binding AddRemoveShellIntegrationText}" Margin="3" />
 			</StackPanel>
 		</GroupBox>
 	</StackPanel>

ILSpy/Options/MiscSettingsViewModel.cs

@@ -16,7 +16,6 @@
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
-using System;
 using System.ComponentModel;
 using System.IO;
 using System.Reflection;
@@ -42,7 +41,10 @@ namespace ICSharpCode.ILSpy.Options
 			AllowMultipleInstances = s.AllowMultipleInstances;
 			LoadPreviousAssemblies = s.LoadPreviousAssemblies;
 
-			AddRemoveShellIntegrationCommand = new DelegateCommand<object>(AddRemoveShellIntegration);
+			if (EnableShellIntegrationCommand)
+			{
+				AddRemoveShellIntegrationCommand = new DelegateCommand<object>(AddRemoveShellIntegration);
+			}
 		}
 
 		/// <summary>
@@ -74,6 +76,7 @@ namespace ICSharpCode.ILSpy.Options
 		}
 
 		public ICommand AddRemoveShellIntegrationCommand { get; }
+		public bool EnableShellIntegrationCommand => AppEnvironment.IsWindows;
 
 		const string rootPath = @"Software\Classes\{0}\shell";
 		const string fullPath = @"Software\Classes\{0}\shell\Open with ILSpy\command";