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// Copyright (c) Josef Pihrt. All rights reserved. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System.Collections.Immutable;
using System.Composition;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Roslynator.CodeFixes;
using Roslynator.CSharp.Refactorings;
namespace Roslynator.CSharp.CodeFixes
{
[ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(UseVarInsteadOfExplicitTypeCodeFixProvider))]
[Shared]
public class UseVarInsteadOfExplicitTypeCodeFixProvider : BaseCodeFixProvider
{
public sealed override ImmutableArray<string> FixableDiagnosticIds
{
get
{
return ImmutableArray.Create(
DiagnosticIdentifiers.UseVarInsteadOfExplicitTypeWhenTypeIsObvious,
DiagnosticIdentifiers.UseVarInsteadOfExplicitTypeWhenTypeIsNotObvious,
DiagnosticIdentifiers.UseVarInsteadOfExplicitTypeInForEach);
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out TypeSyntax type))
return;
foreach (Diagnostic diagnostic in context.Diagnostics)
{
CodeAction codeAction = CodeAction.Create(
"Change type to 'var'",
cancellationToken => ChangeTypeRefactoring.ChangeTypeToVarAsync(context.Document, type, cancellationToken),
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, context.Diagnostics);
}
}
}
}