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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.
using System.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeRefactorings;
using Microsoft.CodeAnalysis.LanguageService;
using Microsoft.CodeAnalysis.Shared.Extensions;
namespace Microsoft.CodeAnalysis.MoveDeclarationNearReference;
internal abstract class AbstractMoveDeclarationNearReferenceCodeRefactoringProvider<TLocalDeclaration> : CodeRefactoringProvider where TLocalDeclaration : SyntaxNode
{
[ImportingConstructor]
public AbstractMoveDeclarationNearReferenceCodeRefactoringProvider()
{
}
public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var (document, _, cancellationToken) = context;
var declaration = await context.TryGetRelevantNodeAsync<TLocalDeclaration>().ConfigureAwait(false);
if (declaration == null)
{
return;
}
var syntaxFacts = document.GetRequiredLanguageService<ISyntaxFactsService>();
var variables = syntaxFacts.GetVariablesOfLocalDeclarationStatement(declaration);
if (variables.Count != 1)
{
return;
}
var service = document.GetRequiredLanguageService<IMoveDeclarationNearReferenceService>();
if (!await service.CanMoveDeclarationNearReferenceAsync(document, declaration, cancellationToken).ConfigureAwait(false))
{
return;
}
context.RegisterRefactoring(
CodeAction.Create(
FeaturesResources.Move_declaration_near_reference,
c => MoveDeclarationNearReferenceAsync(document, declaration, c),
nameof(FeaturesResources.Move_declaration_near_reference),
CodeActionPriority.Low),
declaration.Span);
}
private static async Task<Document> MoveDeclarationNearReferenceAsync(
Document document, SyntaxNode statement, CancellationToken cancellationToken)
{
var service = document.GetRequiredLanguageService<IMoveDeclarationNearReferenceService>();
return await service.MoveDeclarationNearReferenceAsync(document, statement, cancellationToken).ConfigureAwait(false);
}
}
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