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// 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 more information.
#nullable disable warnings
using System;
using System.Collections.Immutable;
using System.Composition;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Analyzer.Utilities;
using Analyzer.Utilities.Extensions;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.Editing;
using Microsoft.CodeAnalysis.Text;
namespace Roslyn.Diagnostics.Analyzers
{
[ExportCodeFixProvider(LanguageNames.CSharp, LanguageNames.VisualBasic, Name = nameof(TestExportsShouldNotBeDiscoverableCodeFixProvider))]
[Shared]
[method: ImportingConstructor]
[method: Obsolete("This exported object must be obtained through the MEF export provider.", error: true)]
public class TestExportsShouldNotBeDiscoverableCodeFixProvider() : CodeFixProvider
{
public override ImmutableArray<string> FixableDiagnosticIds { get; } = ImmutableArray.Create(TestExportsShouldNotBeDiscoverable.Rule.Id);
public override FixAllProvider GetFixAllProvider()
=> WellKnownFixAllProviders.BatchFixer;
public override Task RegisterCodeFixesAsync(CodeFixContext context)
{
foreach (var diagnostic in context.Diagnostics)
{
context.RegisterCodeFix(
CodeAction.Create(
RoslynDiagnosticsAnalyzersResources.TestExportsShouldNotBeDiscoverableCodeFix,
cancellationToken => AddPartNotDiscoverableAttributeAsync(context.Document, diagnostic.Location.SourceSpan, cancellationToken),
equivalenceKey: nameof(TestExportsShouldNotBeDiscoverable)),
diagnostic);
}
return Task.CompletedTask;
}
private static async Task<Document> AddPartNotDiscoverableAttributeAsync(Document document, TextSpan sourceSpan, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var exportingAttribute = root.FindNode(sourceSpan, getInnermostNodeForTie: true);
var generator = SyntaxGenerator.GetGenerator(document);
var declaration = generator.TryGetContainingDeclaration(exportingAttribute, DeclarationKind.Class);
if (declaration is null)
{
return document;
}
var exportedType = semanticModel.GetDeclaredSymbol(declaration, cancellationToken);
if (exportedType is null)
{
return document;
}
INamedTypeSymbol? partNotDiscoverableAttributeSymbol = null;
foreach (var attributeData in exportedType.GetAttributes())
{
INamedTypeSymbol? exportAttributeSymbol = null;
foreach (var attributeClass in attributeData.AttributeClass.GetBaseTypesAndThis())
{
if (attributeClass.Name == nameof(ExportAttribute))
{
exportAttributeSymbol = attributeClass;
break;
}
}
if (exportAttributeSymbol is null)
{
continue;
}
partNotDiscoverableAttributeSymbol = exportAttributeSymbol.ContainingNamespace.GetTypeMembers(nameof(PartNotDiscoverableAttribute)).FirstOrDefault();
if (partNotDiscoverableAttributeSymbol is object)
{
break;
}
}
if (partNotDiscoverableAttributeSymbol is null)
{
// This can only get hit if ExportAttribute is available but PartNotDiscoverableAttribute is missing.
return document;
}
var newDeclaration = generator.AddAttributes(declaration, generator.Attribute(generator.TypeExpression(partNotDiscoverableAttributeSymbol).WithAddImportsAnnotation()));
return document.WithSyntaxRoot(root.ReplaceNode(declaration, newDeclaration));
}
}
}
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