Feature: Wpf IViewFor Generator (#13)

* Feature: Wpf IViewFor Generator

* Add Wpf to resolve usings

src/ReactiveUI.SourceGenerators.Execute/Program.cs

@@ -25,14 +25,14 @@ public static class EntryPoint
     /// <summary>
     /// Defines the entry point of the application.
     /// </summary>
-    public static void Main() => new TestClass();
+    public static void Main() => _ = TestViewModel.Instance;
 }
 
 /// <summary>
 /// TestClass.
 /// </summary>
 [DataContract]
-public partial class TestClass : ReactiveObject
+public partial class TestViewModel : ReactiveObject
 {
     [JsonInclude]
     [DataMember]
@@ -45,9 +45,9 @@ public partial class TestClass : ReactiveObject
     private int _test1Property;
 
     /// <summary>
-    /// Initializes a new instance of the <see cref="TestClass"/> class.
+    /// Initializes a new instance of the <see cref="TestViewModel"/> class.
     /// </summary>
-    public TestClass()
+    public TestViewModel()
     {
         InitializeCommands();
 
@@ -72,7 +72,7 @@ public TestClass()
         _test2PropertyHelper = Test8ObservableCommand!.ToProperty(this, x => x.Test2Property);
 
         Test8ObservableCommand?.Execute(100).Subscribe(Console.Out.WriteLine);
-        Console.Out.WriteLine($"Test2Property Value: {Test2Property}");
+        Console.Out.WriteLine($"Test2Property Value: {Test2}");
         Console.Out.WriteLine($"Test2Property underlying Value: {_test2Property}");
 
         Test9AsyncCommand?.ThrownExceptions.Subscribe(Console.Out.WriteLine);
@@ -85,6 +85,14 @@ public TestClass()
         Console.ReadLine();
     }
 
+    /// <summary>
+    /// Gets the instance.
+    /// </summary>
+    /// <value>
+    /// The instance.
+    /// </value>
+    public static TestViewModel Instance { get; } = new();
+
     /// <summary>
     /// Gets the can execute test1.
     /// </summary>

src/ReactiveUI.SourceGenerators.Execute/ReactiveUI.SourceGenerators.Execute.csproj

@@ -2,8 +2,9 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
+    <UseWPF>true</UseWPF>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
     <LangVersion>latest</LangVersion>

src/ReactiveUI.SourceGenerators.Execute/TestView.cs

@@ -0,0 +1,25 @@
+// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+using System.Windows;
+using ReactiveUI;
+using ReactiveUI.SourceGenerators;
+
+namespace SGReactiveUI.SourceGenerators.Test;
+
+/// <summary>
+/// TestView.
+/// </summary>
+[IViewFor(nameof(TestViewModel))]
+public partial class TestView : Window
+{
+    /// <summary>
+    /// Initializes a new instance of the <see cref="TestView"/> class.
+    /// </summary>
+    public TestView()
+    {
+        ViewModel = TestViewModel.Instance;
+    }
+}

src/ReactiveUI.SourceGenerators/Attributes/IViewForAttribute.cs

@@ -0,0 +1,21 @@
+// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+using System;
+
+namespace ReactiveUI.SourceGenerators;
+
+/// <summary>
+/// ReactiveObjectAttribute.
+/// </summary>
+/// <seealso cref="System.Attribute" />
+/// <remarks>
+/// Initializes a new instance of the <see cref="IViewForAttribute"/> class.
+/// </remarks>
+/// <param name="viewModelType">Type of the view model.</param>
+[AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
+#pragma warning disable CS9113 // Parameter is unread.
+public sealed class IViewForAttribute(string? viewModelType) : Attribute;
+#pragma warning restore CS9113 // Parameter is unread.

src/ReactiveUI.SourceGenerators/Extensions/ITypeSymbolExtensions.cs

@@ -57,6 +57,29 @@ public static bool InheritsFromFullyQualifiedMetadataName(this ITypeSymbol typeS
         return false;
     }
 
+    /// <summary>
+    /// Checks whether or not a given <see cref="ITypeSymbol"/> inherits from a specified type.
+    /// </summary>
+    /// <param name="typeSymbol">The target <see cref="ITypeSymbol"/> instance to check.</param>
+    /// <param name="name">The full name of the type to check for inheritance.</param>
+    /// <returns>Whether or not <paramref name="typeSymbol"/> inherits from <paramref name="name"/>.</returns>
+    public static bool InheritsFromFullyQualifiedMetadataNameStartingWith(this ITypeSymbol typeSymbol, string name)
+    {
+        var baseType = typeSymbol.BaseType;
+
+        while (baseType is not null)
+        {
+            if (baseType.ContainsFullyQualifiedMetadataName(name))
+            {
+                return true;
+            }
+
+            baseType = baseType.BaseType;
+        }
+
+        return false;
+    }
+
     /// <summary>
     /// Checks whether or not a given <see cref="ITypeSymbol"/> inherits from a specified type.
     /// </summary>
@@ -188,6 +211,15 @@ public static bool HasFullyQualifiedMetadataName(this ITypeSymbol symbol, string
         return builder.WrittenSpan.SequenceEqual(name.AsSpan());
     }
 
+    public static bool ContainsFullyQualifiedMetadataName(this ITypeSymbol symbol, string name)
+    {
+        using var builder = ImmutableArrayBuilder<char>.Rent();
+
+        symbol.AppendFullyQualifiedMetadataName(builder);
+
+        return builder.WrittenSpan.ToString().Contains(name);
+    }
+
     /// <summary>
     /// Gets the fully qualified metadata name for a given <see cref="ITypeSymbol"/> instance.
     /// </summary>

src/ReactiveUI.SourceGenerators/Reactive/Models/AttributeInfo.cs → src/ReactiveUI.SourceGenerators/Helpers/AttributeInfo.cs

@@ -10,10 +10,9 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using ReactiveUI.SourceGenerators.Extensions;
-using ReactiveUI.SourceGenerators.Helpers;
 using static Microsoft.CodeAnalysis.CSharp.SyntaxFactory;
 
-namespace ReactiveUI.SourceGenerators.Models;
+namespace ReactiveUI.SourceGenerators.Helpers;
 
 /// <summary>
 /// A model representing an attribute declaration.

src/ReactiveUI.SourceGenerators/Reactive/Models/TypedConstantInfo.Factory.cs → src/ReactiveUI.SourceGenerators/Helpers/TypedConstantInfo.Factory.cs

@@ -11,9 +11,8 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Operations;
-using ReactiveUI.SourceGenerators.Helpers;
 
-namespace ReactiveUI.SourceGenerators.Models;
+namespace ReactiveUI.SourceGenerators.Helpers;
 
 /// <inheritdoc/>
 internal partial record TypedConstantInfo

src/ReactiveUI.SourceGenerators/Reactive/Models/TypedConstantInfo.cs → src/ReactiveUI.SourceGenerators/Helpers/TypedConstantInfo.cs

@@ -9,10 +9,9 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
-using ReactiveUI.SourceGenerators.Helpers;
 using static Microsoft.CodeAnalysis.CSharp.SyntaxFactory;
 
-namespace ReactiveUI.SourceGenerators.Models;
+namespace ReactiveUI.SourceGenerators.Helpers;
 
 /// <summary>
 /// A model representing a typed constant item.