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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
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeGeneration;
using Microsoft.CodeAnalysis.Editing;
using Microsoft.CodeAnalysis.Formatting;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.GenerateMember.GenerateVariable;
internal abstract partial class AbstractGenerateVariableService<TService, TSimpleNameSyntax, TExpressionSyntax>
{
private sealed class GenerateLocalCodeAction(TService service, Document document, State state) : CodeAction
{
private readonly TService _service = service;
private readonly Document _document = document;
private readonly State _state = state;
public override string Title
{
get
{
var text = CodeFixesResources.Generate_local_0;
return string.Format(
text,
_state.IdentifierToken.ValueText);
}
}
protected override async Task<Document> GetChangedDocumentAsync(CancellationToken cancellationToken)
{
var newRoot = await GetNewRootAsync(cancellationToken).ConfigureAwait(false);
var newDocument = _document.WithSyntaxRoot(newRoot);
return newDocument;
}
private async Task<SyntaxNode> GetNewRootAsync(CancellationToken cancellationToken)
{
var semanticModel = await _document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
if (_service.TryConvertToLocalDeclaration(_state.LocalType, _state.IdentifierToken, semanticModel, cancellationToken, out var newRoot))
{
return newRoot;
}
var syntaxFactory = _document.GetLanguageService<SyntaxGenerator>();
var initializer = _state.IsOnlyWrittenTo
? null
: syntaxFactory.DefaultExpression(_state.LocalType);
var type = _state.LocalType;
var localStatement = syntaxFactory.LocalDeclarationStatement(type, _state.IdentifierToken.ValueText, initializer);
localStatement = localStatement.WithAdditionalAnnotations(Formatter.Annotation);
var root = _state.IdentifierToken.GetAncestors<SyntaxNode>().Last();
var context = new CodeGenerationContext(beforeThisLocation: _state.IdentifierToken.GetLocation());
var info = await _document.GetCodeGenerationInfoAsync(context, cancellationToken).ConfigureAwait(false);
return info.Service.AddStatements(root, [localStatement], info, cancellationToken);
}
}
}
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