[Sonic] Support multiple C# documents in auto insert

src/Razor/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/Microsoft.CodeAnalysis.Razor.CohostingShared.projitems

@@ -38,7 +38,6 @@
     <Compile Include="$(MSBuildThisFileDirectory)Formatting\CohostOnTypeFormattingEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Formatting\CohostRangeFormattingEndpoint.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)OnAutoInsert\CohostOnAutoInsertEndpoint.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)OnAutoInsert\CohostOnAutoInsertTriggerCharacterProviders.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RazorAnalyzerAssemblyRedirector.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RazorConfigurationChangedServiceFactory.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)RazorMiscellaneousProjectInfoService.cs" />

src/Razor/src/Razor/src/Microsoft.CodeAnalysis.Razor.CohostingShared/OnAutoInsert/CohostOnAutoInsertEndpoint.cs

@@ -1,16 +1,13 @@
 // 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;
 using System.Composition;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.Razor.CohostingShared;
 using Microsoft.CodeAnalysis.LanguageServer.Handler;
-using Microsoft.CodeAnalysis.Razor.AutoInsert;
 using Microsoft.CodeAnalysis.Razor.Cohost;
 using Microsoft.CodeAnalysis.Razor.Formatting;
 using Microsoft.CodeAnalysis.Razor.Logging;
@@ -33,9 +30,6 @@ internal sealed class CohostOnAutoInsertEndpoint(
     IIncompatibleProjectService incompatibleProjectService,
     IRemoteServiceInvoker remoteServiceInvoker,
     IClientSettingsManager clientSettingsManager,
-#pragma warning disable RS0030 // Do not use banned APIs
-    [ImportMany] IEnumerable<IOnAutoInsertTriggerCharacterProvider> onAutoInsertTriggerCharacterProviders,
-#pragma warning restore RS0030 // Do not use banned APIs
     IHtmlRequestInvoker requestInvoker,
     ILoggerFactory loggerFactory)
     : AbstractCohostDocumentEndpoint<VSInternalDocumentOnAutoInsertParams, VSInternalDocumentOnAutoInsertResponseItem?>(incompatibleProjectService), IDynamicRegistrationProvider
@@ -45,22 +39,18 @@ internal sealed class CohostOnAutoInsertEndpoint(
     private readonly IHtmlRequestInvoker _requestInvoker = requestInvoker;
     private readonly ILogger _logger = loggerFactory.GetOrCreateLogger<CohostOnAutoInsertEndpoint>();
 
-    private readonly string[] _triggerCharacters = CalculateTriggerChars(onAutoInsertTriggerCharacterProviders);
+    private static readonly string[] s_razorOnAutoInsertTriggerCharacters = [">"];
+    private static readonly string[] s_htmlAllowedAutoInsertTriggerCharacters = ["="];
+    private static readonly string[] s_csharpAllowedAutoInsertTriggerCharacters = ["'", "/", "\n", "\""];
 
-    private static string[] CalculateTriggerChars(IEnumerable<IOnAutoInsertTriggerCharacterProvider> onAutoInsertTriggerCharacterProviders)
-    {
-        var providerTriggerCharacters = onAutoInsertTriggerCharacterProviders.Select((provider) => provider.TriggerCharacter);
-
-        HashSet<string> triggerCharacters = [
-            .. providerTriggerCharacters,
+    private static readonly string[] s_triggerCharacters = [
+        .. s_razorOnAutoInsertTriggerCharacters,
 #if !VSCODE
-            // VS Code's auto insert functionality is poly-filled by Roslyn. The Html server has no support for it.
-            .. AutoInsertService.HtmlAllowedAutoInsertTriggerCharacters,
+        // VS Code's auto insert functionality is poly-filled by Roslyn. The Html server has no support for it.
+        .. s_htmlAllowedAutoInsertTriggerCharacters,
 #endif
-            .. AutoInsertService.CSharpAllowedAutoInsertTriggerCharacters ];
-
-        return [.. triggerCharacters];
-    }
+        .. s_csharpAllowedAutoInsertTriggerCharacters
+        ];
 
     protected override bool MutatesSolutionState => false;
 
@@ -75,7 +65,7 @@ public ImmutableArray<Registration> GetRegistrations(VSInternalClientCapabilitie
                 Method = VSInternalMethods.OnAutoInsertName,
                 RegisterOptions = new VSInternalDocumentOnAutoInsertRegistrationOptions()
                 {
-                    TriggerCharacters = _triggerCharacters
+                    TriggerCharacters = s_triggerCharacters
                 }
             }];
         }
@@ -165,5 +155,11 @@ internal readonly struct TestAccessor(CohostOnAutoInsertEndpoint instance)
             TextDocument razorDocument,
             CancellationToken cancellationToken)
                 => instance.HandleRequestAsync(request, razorDocument, cancellationToken);
+
+        public static string[] GetRazorOnAutoInsertTriggerCharacters() => s_razorOnAutoInsertTriggerCharacters;
+
+        public static string[] GetHtmlAllowedAutoInsertTriggerCharacters() => s_htmlAllowedAutoInsertTriggerCharacters;
+
+        public static string[] GetCSharpAllowedAutoInsertTriggerCharacters() => s_csharpAllowedAutoInsertTriggerCharacters;
     }
 }

src/Razor/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/AutoInsert/AutoClosingTagOnAutoInsertProvider.cs → src/Razor/src/Razor/src/Microsoft.CodeAnalysis.Remote.Razor/AutoInsert/AutoClosingTagOnAutoInsertProvider.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Immutable;
+using System.Composition;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using Microsoft.AspNetCore.Razor.Language;
@@ -11,9 +12,11 @@
 
 using RazorSyntaxNode = Microsoft.AspNetCore.Razor.Language.Syntax.SyntaxNode;
 
-namespace Microsoft.CodeAnalysis.Razor.AutoInsert;
+namespace Microsoft.CodeAnalysis.Remote.Razor.AutoInsert;
 
-internal class AutoClosingTagOnAutoInsertProvider : IOnAutoInsertProvider
+[Shared]
+[Export(typeof(IOnAutoInsertProvider))]
+internal sealed class AutoClosingTagOnAutoInsertProvider : IOnAutoInsertProvider
 {
     // From http://dev.w3.org/html5/spec/Overview.html#elements-0
     private static readonly ImmutableHashSet<string> s_voidElements = ImmutableHashSet.Create(StringComparer.OrdinalIgnoreCase,

src/Razor/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/AutoInsert/CloseTextTagOnAutoInsertProvider.cs → src/Razor/src/Razor/src/Microsoft.CodeAnalysis.Remote.Razor/AutoInsert/CloseTextTagOnAutoInsertProvider.cs

@@ -1,16 +1,19 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Composition;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using Microsoft.AspNetCore.Razor.Language;
 using Microsoft.AspNetCore.Razor.Language.Legacy;
 using Microsoft.AspNetCore.Razor.Language.Syntax;
 using Microsoft.CodeAnalysis.Text;
 
-namespace Microsoft.CodeAnalysis.Razor.AutoInsert;
+namespace Microsoft.CodeAnalysis.Remote.Razor.AutoInsert;
 
-internal class CloseTextTagOnAutoInsertProvider : IOnAutoInsertProvider
+[Shared]
+[Export(typeof(IOnAutoInsertProvider))]
+internal sealed class CloseTextTagOnAutoInsertProvider : IOnAutoInsertProvider
 {
     public string TriggerCharacter => ">";
 

src/Razor/src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/AutoInsert/IOnAutoInsertProvider.cs → src/Razor/src/Razor/src/Microsoft.CodeAnalysis.Remote.Razor/AutoInsert/IOnAutoInsertProvider.cs

@@ -4,10 +4,12 @@
 using System.Diagnostics.CodeAnalysis;
 using Microsoft.AspNetCore.Razor.Language;
 
-namespace Microsoft.CodeAnalysis.Razor.AutoInsert;
+namespace Microsoft.CodeAnalysis.Remote.Razor.AutoInsert;
 
-internal interface IOnAutoInsertProvider : IOnAutoInsertTriggerCharacterProvider
+internal interface IOnAutoInsertProvider
 {
+    string TriggerCharacter { get; }
+
     bool TryResolveInsertion(
         Position position,
         RazorCodeDocument codeDocument,