From a7efd1ac014e9482969f332840cd8d32c0e8b4c5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Javier=20Sua=CC=81rez=20Ruiz?=
 <javiersuarezruiz@hotmail.com>
Date: Wed, 21 Apr 2021 20:11:30 +0200
Subject: [PATCH 1/2] Added Linux HandlerExtensions

---
 .../src/Platform/Linux/HandlerExtensions.cs   | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 src/Core/src/Platform/Linux/HandlerExtensions.cs

diff --git a/src/Core/src/Platform/Linux/HandlerExtensions.cs b/src/Core/src/Platform/Linux/HandlerExtensions.cs
new file mode 100644
index 000000000..1f13ad2c2
--- /dev/null
+++ b/src/Core/src/Platform/Linux/HandlerExtensions.cs
@@ -0,0 +1,37 @@
+using Gtk;
+using System;
+
+namespace Microsoft.Maui
+{
+	public static class HandlerExtensions
+	{
+		public static Widget ToNative(this IView view, IMauiContext context)
+		{
+			_ = view ?? throw new ArgumentNullException(nameof(view));
+			_ = context ?? throw new ArgumentNullException(nameof(context));
+
+			var handler = view.Handler;
+
+			if (handler == null)
+			{
+				handler = context.Handlers.GetHandler(view.GetType());
+
+				if (handler == null)
+					throw new Exception($"Handler not found for view {view}");
+
+				handler.SetMauiContext(context);
+
+				view.Handler = handler;
+			}
+
+			handler.SetVirtualView(view);
+
+			if (handler.NativeView is not Widget result)
+			{
+				throw new InvalidOperationException($"Unable to convert {view} to {typeof(Widget)}");
+			}
+
+			return result;
+		}
+	}
+}
\ No newline at end of file

From 5ce87eb9040e7bd513a152ca1c0b8a9d5f7722c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Javier=20Sua=CC=81rez=20Ruiz?=
 <javiersuarezruiz@hotmail.com>
Date: Wed, 21 Apr 2021 20:37:53 +0200
Subject: [PATCH 2/2] Add Linux MauiWindow

---
 .../src/Platform/Linux/ActivationState.cs     | 14 ++++++
 src/Core/src/Platform/Linux/MauiContext.cs    | 27 +++++++++++
 src/Core/src/Platform/Linux/MauiWindow.cs     | 47 +++++++++++++++++++
 3 files changed, 88 insertions(+)
 create mode 100644 src/Core/src/Platform/Linux/ActivationState.cs
 create mode 100644 src/Core/src/Platform/Linux/MauiContext.cs
 create mode 100644 src/Core/src/Platform/Linux/MauiWindow.cs

diff --git a/src/Core/src/Platform/Linux/ActivationState.cs b/src/Core/src/Platform/Linux/ActivationState.cs
new file mode 100644
index 000000000..6719e581c
--- /dev/null
+++ b/src/Core/src/Platform/Linux/ActivationState.cs
@@ -0,0 +1,14 @@
+using System;
+
+namespace Microsoft.Maui
+{
+	public class ActivationState : IActivationState
+	{
+		public ActivationState(IMauiContext context)
+		{
+			Context = context ?? throw new ArgumentNullException(nameof(context));
+		}
+
+		public IMauiContext Context { get; }
+	}
+}
\ No newline at end of file
diff --git a/src/Core/src/Platform/Linux/MauiContext.cs b/src/Core/src/Platform/Linux/MauiContext.cs
new file mode 100644
index 000000000..e6549d784
--- /dev/null
+++ b/src/Core/src/Platform/Linux/MauiContext.cs
@@ -0,0 +1,27 @@
+using System;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Microsoft.Maui
+{
+	public class MauiContext : IMauiContext
+	{
+		readonly IServiceProvider? _services;
+		readonly IMauiHandlersServiceProvider? _mauiHandlersServiceProvider;
+
+		public MauiContext()
+		{
+		}
+
+		public MauiContext(IServiceProvider services)
+		{
+			_services = services ?? throw new ArgumentNullException(nameof(services));
+			_mauiHandlersServiceProvider = Services.GetRequiredService<IMauiHandlersServiceProvider>();
+		}
+
+		public IServiceProvider Services =>
+			_services ?? throw new InvalidOperationException($"No service provider was specified during construction.");
+
+		public IMauiHandlersServiceProvider Handlers =>
+			_mauiHandlersServiceProvider ?? throw new InvalidOperationException($"No service provider was specified during construction.");
+	}
+}
\ No newline at end of file
diff --git a/src/Core/src/Platform/Linux/MauiWindow.cs b/src/Core/src/Platform/Linux/MauiWindow.cs
new file mode 100644
index 000000000..9c335b0ad
--- /dev/null
+++ b/src/Core/src/Platform/Linux/MauiWindow.cs
@@ -0,0 +1,47 @@
+using System;
+using Gtk;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Maui.Hosting;
+using Microsoft.Maui.LifecycleEvents;
+
+namespace Microsoft.Maui
+{
+	public class MauiWindow<TStartup> : Window
+		where TStartup : IStartup, new()
+	{
+		public MauiWindow() : base(WindowType.Toplevel)
+		{
+			var startup = new TStartup();
+
+			var host = startup
+				.CreateAppHostBuilder()
+				.ConfigureServices(ConfigureNativeServices)
+				.ConfigureUsing(startup)
+				.Build();
+
+			Services = host.Services;
+			Application = Services.GetRequiredService<IApplication>();
+
+			var mauiContext = new MauiContext(Services);
+
+			var activationState = new ActivationState(mauiContext);
+			var window = Application.CreateWindow(activationState);
+			window.MauiContext = mauiContext;
+
+			var content = (window.Page as IView) ?? window.Page.View;
+
+			Add(content.ToNative(window.MauiContext));
+			Child.ShowAll();
+		}
+
+		public new IApplication Application { get; protected set; } = null!;
+
+		public IServiceProvider Services { get; protected set; } = null!;
+
+		// Configure native services like HandlersContext, ImageSourceHandlers etc.. 
+		void ConfigureNativeServices(HostBuilderContext ctx, IServiceCollection services)
+		{
+		}
+	}
+}
\ No newline at end of file