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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(InterpolatedStringCodeFixProvider))]
[Shared]
public class InterpolatedStringCodeFixProvider : BaseCodeFixProvider
{
public sealed override ImmutableArray<string> FixableDiagnosticIds
{
get
{
return ImmutableArray.Create(
DiagnosticIdentifiers.AvoidInterpolatedStringWithNoInterpolation,
DiagnosticIdentifiers.UnnecessaryInterpolatedString,
DiagnosticIdentifiers.ReplaceInterpolatedStringWithConcatenation);
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
if (!TryFindFirstAncestorOrSelf(root, context.Span, out InterpolatedStringExpressionSyntax interpolatedString))
return;
foreach (Diagnostic diagnostic in context.Diagnostics)
{
switch (diagnostic.Id)
{
case DiagnosticIdentifiers.AvoidInterpolatedStringWithNoInterpolation:
{
CodeAction codeAction = CodeAction.Create(
"Remove $",
cancellationToken => ReplaceInterpolatedStringWithStringLiteralRefactoring.RefactorAsync(context.Document, interpolatedString, cancellationToken),
GetEquivalenceKey(diagnostic.Id));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.UnnecessaryInterpolatedString:
{
var interpolation = (InterpolationSyntax)interpolatedString.Contents[0];
CodeAction codeAction = CodeAction.Create(
$"Replace interpolated string with '{interpolation.Expression}'",
cancellationToken => UnnecessaryInterpolatedStringRefactoring.RefactorAsync(context.Document, interpolatedString, cancellationToken),
GetEquivalenceKey(diagnostic.Id));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
case DiagnosticIdentifiers.ReplaceInterpolatedStringWithConcatenation:
{
CodeAction codeAction = CodeAction.Create(
"Replace interpolated string with concatenation",
cancellationToken => ReplaceInterpolatedStringWithConcatenationRefactoring.RefactorAsync(context.Document, interpolatedString, cancellationToken),
GetEquivalenceKey(diagnostic.Id));
context.RegisterCodeFix(codeAction, diagnostic);
break;
}
}
}
}
}
}