Match IComponent interface by symbol instead of name

src/Compiler/Microsoft.AspNetCore.Razor.Language/src/Components/ComponentsApi.cs

@@ -1,8 +1,6 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-#nullable disable
-
 namespace Microsoft.AspNetCore.Razor.Language.Components;
 
 // Constants for method names used in code-generation
@@ -40,9 +38,8 @@ public static class InjectAttribute
 
     public static class IComponent
     {
-        public const string FullTypeName = "Microsoft.AspNetCore.Components.IComponent";
-
-        public const string MetadataName = FullTypeName;
+        public const string MetadataName = WellKnownTypeNames.MicrosoftAspNetCoreComponentsIComponent;
+        public const string FullTypeName = MetadataName;
     }
 
     public static class IDictionary

src/Compiler/Microsoft.CodeAnalysis.Razor/src/WellKnownTypeNames.cs → src/Compiler/Microsoft.AspNetCore.Razor.Language/src/WellKnownTypeNames.cs

@@ -1,9 +1,10 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-namespace Microsoft.CodeAnalysis.Razor;
+namespace Microsoft.AspNetCore.Razor.Language;
 
-internal static class WellKnownTypeNames
+public static class WellKnownTypeNames
 {
+    public const string MicrosoftAspNetCoreComponentsIComponent = "Microsoft.AspNetCore.Components.IComponent";
     public const string SystemThreadingTasksTask1 = "System.Threading.Tasks.Task`1";
 }

src/Compiler/Microsoft.CodeAnalysis.Razor/src/ComponentDetectionConventions.cs

@@ -1,10 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-#nullable enable
-
 using System;
-using System.Linq;
 
 namespace Microsoft.CodeAnalysis.Razor;
 
@@ -25,24 +22,6 @@ public static bool IsComponent(INamedTypeSymbol symbol, INamedTypeSymbol icompon
         return
             symbol.DeclaredAccessibility == Accessibility.Public &&
             !symbol.IsAbstract &&
-            symbol.AllInterfaces.Contains(icomponentSymbol);
-    }
-
-    public static bool IsComponent(INamedTypeSymbol symbol, string icomponentSymbolName)
-    {
-        if (symbol is null)
-        {
-            throw new ArgumentNullException(nameof(symbol));
-        }
-
-        if (icomponentSymbolName is null)
-        {
-            throw new ArgumentNullException(nameof(icomponentSymbolName));
-        }
-
-        return
-            symbol.DeclaredAccessibility == Accessibility.Public &&
-            !symbol.IsAbstract &&
-            symbol.AllInterfaces.Any(s => s.HasFullName(icomponentSymbolName));
+            symbol.AllInterfaces.Contains(icomponentSymbol, SymbolEqualityComparer.Default);
     }
 }

src/Compiler/Microsoft.CodeAnalysis.Razor/src/ComponentTagHelperDescriptorProvider.cs

@@ -30,15 +30,16 @@ public void Execute(TagHelperDescriptorProviderContext context)
             throw new ArgumentNullException(nameof(context));
         }
 
-        var compilation = context.GetCompilation();
-        if (compilation == null)
+        var typeProvider = context.GetTypeProvider();
+        if (typeProvider == null
+            || !typeProvider.TryGetOrCreateTypeByMetadataName(WellKnownTypeNames.MicrosoftAspNetCoreComponentsIComponent, out var icomponentSymbol))
         {
             // No compilation, nothing to do.
             return;
         }
 
         var types = new List<INamedTypeSymbol>();
-        var visitor = new ComponentTypeVisitor(types);
+        var visitor = new ComponentTypeVisitor(types, icomponentSymbol);
 
         var targetSymbol = context.Items.GetTargetSymbol();
         if (targetSymbol is not null)
@@ -47,6 +48,7 @@ public void Execute(TagHelperDescriptorProviderContext context)
         }
         else
         {
+            var compilation = typeProvider.Compilation;
             visitor.Visit(compilation.Assembly.GlobalNamespace);
             foreach (var reference in compilation.References)
             {
@@ -575,15 +577,17 @@ private enum PropertyKind
     private class ComponentTypeVisitor : SymbolVisitor
     {
         private readonly List<INamedTypeSymbol> _results;
+        private readonly INamedTypeSymbol _icomponentSymbol;
 
-        public ComponentTypeVisitor(List<INamedTypeSymbol> results)
+        public ComponentTypeVisitor(List<INamedTypeSymbol> results, INamedTypeSymbol icomponentSymbol)
         {
             _results = results;
+            _icomponentSymbol = icomponentSymbol;
         }
 
         public override void VisitNamedType(INamedTypeSymbol symbol)
         {
-            if (ComponentDetectionConventions.IsComponent(symbol, ComponentsApi.IComponent.MetadataName))
+            if (ComponentDetectionConventions.IsComponent(symbol, _icomponentSymbol))
             {
                 _results.Add(symbol);
             }

src/Compiler/Microsoft.CodeAnalysis.Razor/src/ImmutableArrayExtensions.cs

@@ -0,0 +1,24 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Collections.Generic;
+using System.Collections.Immutable;
+
+namespace Microsoft.CodeAnalysis.Razor;
+
+internal static class ImmutableArrayExtensions
+{
+    public static bool Contains<T, TComparer>(this ImmutableArray<T> array, T item, TComparer comparer)
+        where TComparer : IEqualityComparer<T>
+    {
+        foreach (var actual in array)
+        {
+            if (comparer.Equals(actual, item))
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}

src/Compiler/Microsoft.CodeAnalysis.Razor/src/WellKnownTypeProvider.cs

@@ -10,6 +10,7 @@
 using System.Globalization;
 using System.Linq;
 using System.Threading;
+using Microsoft.AspNetCore.Razor.Language;
 
 namespace Microsoft.CodeAnalysis.Razor;