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DirectiveTriviaCodeFixProvider.cs
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DirectiveTriviaCodeFixProvider.cs
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// Copyright (c) .NET Foundation and Contributors. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Collections.Immutable;
using System.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Roslynator.Formatting.CSharp;
namespace Roslynator.Formatting.CodeFixes.CSharp;
[ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(DirectiveTriviaCodeFixProvider))]
[Shared]
public sealed class DirectiveTriviaCodeFixProvider : BaseCodeFixProvider
{
public override ImmutableArray<string> FixableDiagnosticIds
{
get
{
return ImmutableArray.Create(
DiagnosticIdentifiers.AddBlankLineAfterRegionDirective,
DiagnosticIdentifiers.AddBlankLineBeforeEndRegionDirective);
}
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out DirectiveTriviaSyntax directiveTrivia, findInsideTrivia: true))
return;
Document document = context.Document;
Diagnostic diagnostic = context.Diagnostics[0];
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.AddBlankLineAfterRegionDirective:
case DiagnosticIdentifiers.AddBlankLineBeforeEndRegionDirective:
{
CodeAction codeAction = CodeAction.Create(
CodeFixTitles.AddBlankLine,
ct => AddBlankLineAfterRegionDirectiveAndBeforeEndRegionAsync(document, directiveTrivia, ct),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
private static Task<Document> AddBlankLineAfterRegionDirectiveAndBeforeEndRegionAsync(
Document document,
DirectiveTriviaSyntax directiveTrivia,
CancellationToken cancellationToken)
{
switch (directiveTrivia.Kind())
{
case SyntaxKind.RegionDirectiveTrivia:
return CodeFixHelpers.AddBlankLineAfterDirectiveAsync(document, directiveTrivia, cancellationToken);
case SyntaxKind.EndRegionDirectiveTrivia:
return CodeFixHelpers.AddBlankLineBeforeDirectiveAsync(document, directiveTrivia, cancellationToken);
default:
throw new InvalidOperationException();
}
}
}