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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.
using System;
using System.Collections.Immutable;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.LanguageServer.Handler;
using Microsoft.CodeAnalysis.LanguageServer.Handler.Diagnostics;
using Microsoft.CodeAnalysis.PooledObjects;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.EditAndContinue;
internal static partial class EditAndContinueDiagnosticSource
{
private sealed class ProjectSource(Project project, ImmutableArray<DiagnosticData> diagnostics) : AbstractProjectDiagnosticSource(project)
{
public override bool IsLiveSource()
=> true;
public override Task<ImmutableArray<DiagnosticData>> GetDiagnosticsAsync(RequestContext context, CancellationToken cancellationToken)
=> Task.FromResult(diagnostics);
}
private sealed class ClosedDocumentSource(TextDocument document, ImmutableArray<DiagnosticData> diagnostics) : AbstractWorkspaceDocumentDiagnosticSource(document)
{
public override bool IsLiveSource()
=> true;
public override Task<ImmutableArray<DiagnosticData>> GetDiagnosticsAsync(RequestContext context, CancellationToken cancellationToken)
=> Task.FromResult(diagnostics);
}
public static async ValueTask<ImmutableArray<IDiagnosticSource>> CreateWorkspaceDiagnosticSourcesAsync(Solution solution, Func<Document, bool> isDocumentOpen, CancellationToken cancellationToken)
{
// Do not report EnC diagnostics for a non-host workspace, or if Hot Reload/EnC session is not active.
if (solution.WorkspaceKind != WorkspaceKind.Host ||
solution.Services.GetService<IEditAndContinueWorkspaceService>()?.SessionTracker is not { IsSessionActive: true } sessionStateTracker)
{
return [];
}
using var _ = ArrayBuilder<IDiagnosticSource>.GetInstance(out var sources);
var applyDiagnostics = sessionStateTracker.ApplyChangesDiagnostics;
var dataByDocument = from data in applyDiagnostics
where data.DocumentId != null
group data by data.DocumentId into documentData
select documentData;
// diagnostics associated with closed documents:
foreach (var (documentId, diagnostics) in dataByDocument)
{
var document = await solution.GetDocumentAsync(documentId, includeSourceGenerated: true, cancellationToken).ConfigureAwait(false);
if (document != null && !isDocumentOpen(document))
{
sources.Add(new ClosedDocumentSource(document, diagnostics.ToImmutableArray()));
}
}
// diagnostics not associated with a document:
sources.AddRange(
from data in applyDiagnostics
where data.DocumentId == null && data.ProjectId != null
group data by data.ProjectId into projectData
let project = solution.GetProject(projectData.Key)
where project != null
select new ProjectSource(project, projectData.ToImmutableArray()));
return sources.ToImmutable();
}
}
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