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// Copyright (c) Microsoft. All Rights Reserved. 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.CodeActions;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis;
using ICSharpCode.NRefactory6.CSharp.Features.RemoveUnnecessaryImports;
using MonoDevelop.Core;
using ICSharpCode.NRefactory6.CSharp.Refactoring;
using Microsoft.CodeAnalysis.Text;
using MonoDevelop.CSharp.Diagnostics;
namespace MonoDevelop.CSharp.CodeFixes.RemoveUnusedUsings
{
[ExportCodeFixProvider(LanguageNames.CSharp, Name = PredefinedCodeFixProviderNames.RemoveUnnecessaryImports), Shared]
[ExtensionOrder(After = PredefinedCodeFixProviderNames.AddMissingReference)]
internal class RemoveUnnecessaryUsingsCodeFixProvider : CodeFixProvider
{
public sealed override ImmutableArray<string> FixableDiagnosticIds
{
get { return ImmutableArray.Create(IDEDiagnosticIds.RemoveUnnecessaryImportsDiagnosticId); }
}
public sealed override FixAllProvider GetFixAllProvider()
{
return WellKnownFixAllProviders.BatchFixer;
}
static readonly CSharpRemoveUnnecessaryImportsService service = new CSharpRemoveUnnecessaryImportsService();
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
var document = context.Document;
var span = context.Span;
var cancellationToken = context.CancellationToken;
var model = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var newDocument = service.RemoveUnnecessaryImports(document, model, root, cancellationToken);
if (newDocument == document || newDocument == null)
{
return;
}
context.RegisterCodeFix(
new DocumentChangeAction(context.Diagnostics[0].Location.SourceSpan, DiagnosticSeverity.Warning,
GettextCatalog.GetString ("Remove Unnecessary Usings"),
(c) => Task.FromResult(newDocument)),
context.Diagnostics);
}
}
}
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