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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.Shared.Extensions;
using Microsoft.CodeAnalysis.Text;
namespace Microsoft.CodeAnalysis.CodeFixes.Iterator;
internal abstract class AbstractIteratorCodeFixProvider : CodeFixProvider
{
public override FixAllProvider GetFixAllProvider()
{
// Fix All is not supported by this code fix
return null;
}
protected abstract Task<CodeAction> GetCodeFixAsync(SyntaxNode root, SyntaxNode node, Document document, Diagnostic diagnostics, CancellationToken cancellationToken);
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
var root = await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
if (!TryGetNode(root, context.Span, out var node))
{
return;
}
var diagnostic = context.Diagnostics.FirstOrDefault();
var codeAction = await GetCodeFixAsync(root, node, context.Document, diagnostic, context.CancellationToken).ConfigureAwait(false);
if (codeAction != null)
{
context.RegisterCodeFix(codeAction, diagnostic);
}
}
protected virtual bool TryGetNode(SyntaxNode root, TextSpan span, out SyntaxNode node)
{
node = null;
var ancestors = root.FindToken(span.Start).GetAncestors<SyntaxNode>();
if (!ancestors.Any())
{
return false;
}
node = ancestors.FirstOrDefault(n => n.Span.Contains(span) && n != root);
return node != null;
}
}
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