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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;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Roslynator.CodeFixes;
using Roslynator.CSharp.Refactorings;
namespace Roslynator.CSharp.CodeFixes
{
[ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(RemoveRedundantCastCodeFixProvider))]
[Shared]
public class RemoveRedundantCastCodeFixProvider : BaseCodeFixProvider
{
public sealed override ImmutableArray<string> FixableDiagnosticIds
{
get { return ImmutableArray.Create(DiagnosticIdentifiers.RemoveRedundantCast); }
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out SyntaxNode node, predicate: f => f.IsKind(SyntaxKind.CastExpression, SyntaxKind.InvocationExpression)))
return;
switch (node.Kind())
{
case SyntaxKind.CastExpression:
{
CodeAction codeAction = CodeAction.Create(
"Remove redundant cast",
cancellationToken => RemoveRedundantCastRefactoring.RefactorAsync(context.Document, (CastExpressionSyntax)node, cancellationToken),
GetEquivalenceKey(DiagnosticIdentifiers.RemoveRedundantCast));
context.RegisterCodeFix(codeAction, context.Diagnostics);
break;
}
case SyntaxKind.InvocationExpression:
{
CodeAction codeAction = CodeAction.Create(
"Remove redundant cast",
cancellationToken => RemoveRedundantCastRefactoring.RefactorAsync(context.Document, (InvocationExpressionSyntax)node, cancellationToken),
GetEquivalenceKey(DiagnosticIdentifiers.RemoveRedundantCast));
context.RegisterCodeFix(codeAction, context.Diagnostics);
break;
}
}
}
}
}