Add button to view the formatting document to the syntax visualizer

src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Formatting/Passes/New/CSharpFormattingPass.cs

@@ -1,10 +1,12 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT license. See License.txt in the project root for license information.
 
+using System;
 using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Threading;
 using System.Threading.Tasks;
+using Microsoft.AspNetCore.Razor.Language;
 using Microsoft.AspNetCore.Razor.PooledObjects;
 using Microsoft.CodeAnalysis.CSharp;
 using Microsoft.CodeAnalysis.ExternalAccess.Razor;
@@ -171,4 +173,8 @@ private async Task<SourceText> FormatCSharpAsync(SourceText generatedCSharpText,
 
         return generatedCSharpText.WithChanges(csharpChanges);
     }
+
+    [Obsolete("Only for the syntax visualizer, do not call")]
+    internal static string GetFormattingDocumentContentsForSyntaxVisualizer(RazorCodeDocument codeDocument)
+        => CSharpDocumentGenerator.Generate(codeDocument, new()).SourceText.ToString();
 }

src/Razor/src/Microsoft.VisualStudio.RazorExtension/SyntaxVisualizer/SyntaxVisualizerControl.xaml.cs

@@ -10,6 +10,7 @@
 using System.Windows.Controls;
 using Microsoft.AspNetCore.Razor.Language;
 using Microsoft.AspNetCore.Razor.Serialization.Json;
+using Microsoft.CodeAnalysis.Razor.Formatting.New;
 using Microsoft.VisualStudio.LanguageServer.ContainedLanguage;
 using Microsoft.VisualStudio.LanguageServer.ContainedLanguage.Extensions;
 using Microsoft.VisualStudio.Razor;
@@ -108,6 +109,30 @@ void IDisposable.Dispose()
         }
     }
 
+    public void ShowFormattingDocument()
+    {
+        if (_activeWpfTextView is null)
+        {
+            return;
+        }
+
+        EnsureInitialized();
+
+        if (_fileUriProvider.TryGet(_activeWpfTextView.TextBuffer, out var hostDocumentUri))
+        {
+            var codeDocument = GetCodeDocument();
+            if (codeDocument is null)
+            {
+                return;
+            }
+
+#pragma warning disable CS0618 // Type or member is obsolete
+            var formattingDocument = CSharpFormattingPass.GetFormattingDocumentContentsForSyntaxVisualizer(codeDocument);
+#pragma warning restore CS0618 // Type or member is obsolete
+            OpenGeneratedCode(hostDocumentUri.AbsoluteUri + ".formatting.cs", formattingDocument);
+        }
+    }
+
     public void ShowGeneratedCode()
     {
         if (_activeWpfTextView is null)

src/Razor/src/Microsoft.VisualStudio.RazorExtension/SyntaxVisualizer/SyntaxVisualizerToolWindow.cs

@@ -31,6 +31,7 @@ internal class SyntaxVisualizerToolWindow : ToolWindowPane
     private const int CmdIdShowAllTagHelpers = 0x0113;
     private const int CmdIdShowInScopeTagHelpers = 0x0114;
     private const int CmdIdShowReferencedTagHelpers = 0x0115;
+    private const int CmdidShowFormattingDocument = 0x0116;
 
     private MenuCommand? _showSourceMappingsCommand;
     private SyntaxVisualizerControl _visualizerControl => (SyntaxVisualizerControl)Content;
@@ -82,6 +83,7 @@ internal void InitializeCommands(IMenuCommandService mcs, Guid guidSyntaxVisuali
         };
 
         mcs.AddCommand(_showSourceMappingsCommand);
+        mcs.AddCommand(new MenuCommand(ShowFormattingDocument, new CommandID(guidSyntaxVisualizerMenuCmdSet, CmdidShowFormattingDocument)));
         mcs.AddCommand(new MenuCommand(ShowGeneratedCode, new CommandID(guidSyntaxVisualizerMenuCmdSet, CmdIdShowGeneratedCode)));
         mcs.AddCommand(new MenuCommand(ShowGeneratedHtml, new CommandID(guidSyntaxVisualizerMenuCmdSet, CmdIdShowGeneratedHtml)));
         mcs.AddCommand(new MenuCommand(ShowAllTagHelpers, new CommandID(guidSyntaxVisualizerMenuCmdSet, CmdIdShowAllTagHelpers)));
@@ -100,6 +102,11 @@ private void ShowSourceMappings(object sender, EventArgs e)
         }
     }
 
+    private void ShowFormattingDocument(object sender, EventArgs e)
+    {
+        _visualizerControl.ShowFormattingDocument();
+    }
+
     private void ShowGeneratedCode(object sender, EventArgs e)
     {
         _visualizerControl.ShowGeneratedCode();

src/Razor/src/Microsoft.VisualStudio.RazorExtension/SyntaxVisualizerMenu.vsct

@@ -98,6 +98,13 @@
         </Strings>
       </Button>
 
+      <Button guid="guidSyntaxVisualizerMenuCmdSet" id="cmdidShowFormattingDocument" priority="0x202" type="Button">
+        <Parent guid="guidSyntaxVisualizerMenuCmdSet" id="grpidRazorSyntaxVisualizer" />
+        <Strings>
+          <ButtonText>Show Formatting Document</ButtonText>
+        </Strings>
+      </Button>
+
       <Button guid="guidSyntaxVisualizerMenuCmdSet" id="cmdIdShowAllTagHelpers" priority="0x203" type="Button">
         <Parent guid="guidSyntaxVisualizerMenuCmdSet" id="grpidRazorSyntaxVisualizer" />
         <Strings>
@@ -140,6 +147,7 @@
       <IDSymbol name="cmdIdShowAllTagHelpers" value="0x0113" />
       <IDSymbol name="cmdIdShowInScopeTagHelpers" value="0x0114" />
       <IDSymbol name="cmdIdShowReferencedTagHelpers" value="0x0115" />
+      <IDSymbol name="cmdidShowFormattingDocument" value="0x0116" />
     </GuidSymbol>
   </Symbols>
 </CommandTable>