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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.ComponentModel.Composition;
using System.Diagnostics.CodeAnalysis;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Editor.BackgroundWorkIndicator;
using Microsoft.CodeAnalysis.Editor.Commanding.Commands;
using Microsoft.CodeAnalysis.Editor.Shared.Extensions;
using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
using Microsoft.CodeAnalysis.Formatting;
using Microsoft.CodeAnalysis.Options;
using Microsoft.CodeAnalysis.OrganizeImports;
using Microsoft.CodeAnalysis.Organizing;
using Microsoft.CodeAnalysis.RemoveUnnecessaryImports;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Shared.TestHooks;
using Microsoft.CodeAnalysis.Text;
using Microsoft.VisualStudio.Commanding;
using Microsoft.VisualStudio.Text;
using Microsoft.VisualStudio.Text.Editor.Commanding;
using Microsoft.VisualStudio.Threading;
using Microsoft.VisualStudio.Utilities;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.Editor.Implementation.Organizing;
[Export(typeof(ICommandHandler))]
[ContentType(ContentTypeNames.CSharpContentType)]
[ContentType(ContentTypeNames.VisualBasicContentType)]
[ContentType(ContentTypeNames.XamlContentType)]
[Name(PredefinedCommandHandlerNames.OrganizeDocument)]
[method: ImportingConstructor]
[SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification = "Used in test code: https://github.com/dotnet/roslyn/issues/42814")]
internal class OrganizeDocumentCommandHandler(
IThreadingContext threadingContext,
IAsynchronousOperationListenerProvider listenerProvider) :
ICommandHandler<OrganizeDocumentCommandArgs>,
ICommandHandler<SortImportsCommandArgs>,
ICommandHandler<SortAndRemoveUnnecessaryImportsCommandArgs>
{
private readonly IThreadingContext _threadingContext = threadingContext;
private readonly IAsynchronousOperationListener _listener = listenerProvider.GetListener(FeatureAttribute.OrganizeDocument);
public string DisplayName => EditorFeaturesResources.Organize_Document;
public CommandState GetCommandState(OrganizeDocumentCommandArgs args)
=> GetCommandState(args, _ => EditorFeaturesResources.Organize_Document, needsSemantics: true);
public CommandState GetCommandState(SortImportsCommandArgs args)
=> GetCommandState(args, o => o.SortImportsDisplayStringWithAccelerator, needsSemantics: false);
public CommandState GetCommandState(SortAndRemoveUnnecessaryImportsCommandArgs args)
=> GetCommandState(args, o => o.SortAndRemoveUnusedImportsDisplayStringWithAccelerator, needsSemantics: true);
private static CommandState GetCommandState(EditorCommandArgs args, Func<IOrganizeImportsService, string> descriptionString, bool needsSemantics)
{
if (IsCommandSupported(args, needsSemantics, out var workspace))
{
var organizeImportsService = workspace.Services.SolutionServices.GetProjectServices(args.SubjectBuffer)!.GetRequiredService<IOrganizeImportsService>();
return new CommandState(isAvailable: true, displayText: descriptionString(organizeImportsService));
}
else
{
return CommandState.Unspecified;
}
}
private static bool IsCommandSupported(EditorCommandArgs args, bool needsSemantics, [NotNullWhen(true)] out Workspace? workspace)
{
workspace = null;
if (args.SubjectBuffer.TryGetWorkspace(out var retrievedWorkspace))
{
workspace = retrievedWorkspace;
if (!workspace.CanApplyChange(ApplyChangesKind.ChangeDocument))
{
return false;
}
if (workspace.Kind == WorkspaceKind.MiscellaneousFiles)
{
return !needsSemantics;
}
return args.SubjectBuffer.SupportsRefactorings();
}
return false;
}
private bool ExecuteCommand(
EditorCommandArgs commandArgs,
CommandExecutionContext context,
Func<ITextSnapshot, IUIThreadOperationContext, Task<Document?>> getCurrentDocumentAsync,
Func<Document, CancellationToken, Task<Document>> getChangedDocumentAsync)
{
// We're showing our own UI, ensure the editor doesn't show anything itself.
context.OperationContext.TakeOwnership();
var token = _listener.BeginAsyncOperation(nameof(ExecuteCommand));
_ = ExecuteAsync(commandArgs, getCurrentDocumentAsync, getChangedDocumentAsync)
.ReportNonFatalErrorAsync()
.CompletesAsyncOperation(token);
return true;
}
private async Task ExecuteAsync(
EditorCommandArgs commandArgs,
Func<ITextSnapshot, IUIThreadOperationContext, Task<Document?>> getCurrentDocumentAsync,
Func<Document, CancellationToken, Task<Document>> getChangedDocumentAsync)
{
await _threadingContext.JoinableTaskFactory.SwitchToMainThreadAsync();
var subjectBuffer = commandArgs.SubjectBuffer;
var textView = commandArgs.TextView;
var caretPoint = textView.GetCaretPoint(subjectBuffer);
if (caretPoint is null)
return;
if (!subjectBuffer.TryGetWorkspace(out var workspace))
return;
var snapshotSpan = textView.GetTextElementSpan(caretPoint.Value);
var indicatorFactory = workspace.Services.GetRequiredService<IBackgroundWorkIndicatorFactory>();
using var backgroundWorkContext = indicatorFactory.Create(
commandArgs.TextView,
snapshotSpan,
EditorFeaturesResources.Organizing_document,
cancelOnEdit: true,
cancelOnFocusLost: false);
var cancellationToken = backgroundWorkContext.UserCancellationToken;
await TaskScheduler.Default;
var currentDocument = await getCurrentDocumentAsync(snapshotSpan.Snapshot, backgroundWorkContext).ConfigureAwait(false);
if (currentDocument is null)
return;
var newDocument = await getChangedDocumentAsync(currentDocument, cancellationToken).ConfigureAwait(false);
if (currentDocument == newDocument)
return;
var changes = await newDocument.GetTextChangesAsync(currentDocument, cancellationToken).ConfigureAwait(false);
// Required to switch back to the UI thread to call TryApplyChanges
await _threadingContext.JoinableTaskFactory.SwitchToMainThreadAsync(cancellationToken);
// We're about to make an edit ourselves. so disable the cancellation that happens on editing.
backgroundWorkContext.CancelOnEdit = false;
commandArgs.SubjectBuffer.ApplyChanges(changes);
}
public bool ExecuteCommand(OrganizeDocumentCommandArgs args, CommandExecutionContext context)
=> ExecuteCommand(
args, context,
// Need full semantics for this operation.
(snapshot, context) => snapshot.GetFullyLoadedOpenDocumentInCurrentContextWithChangesAsync(context),
(document, cancellationToken) => OrganizingService.OrganizeAsync(document, cancellationToken: cancellationToken));
public bool ExecuteCommand(SortImportsCommandArgs args, CommandExecutionContext context)
=> ExecuteCommand(
args, context,
// Only need syntax for this operation.
(snapshot, context) => Task.FromResult(snapshot.GetOpenDocumentInCurrentContextWithChanges()),
async (document, cancellationToken) =>
{
var organizeImportsService = document.GetRequiredLanguageService<IOrganizeImportsService>();
var options = await document.GetOrganizeImportsOptionsAsync(cancellationToken).ConfigureAwait(false);
return await organizeImportsService.OrganizeImportsAsync(document, options, cancellationToken).ConfigureAwait(false);
});
public bool ExecuteCommand(SortAndRemoveUnnecessaryImportsCommandArgs args, CommandExecutionContext context)
=> ExecuteCommand(
args, context,
// Need full semantics for this operation.
(snapshot, context) => snapshot.GetFullyLoadedOpenDocumentInCurrentContextWithChangesAsync(context),
async (document, cancellationToken) =>
{
var formattingOptions = document.SupportsSyntaxTree
? await document.GetSyntaxFormattingOptionsAsync(cancellationToken).ConfigureAwait(false)
: null;
var removeImportsService = document.GetRequiredLanguageService<IRemoveUnnecessaryImportsService>();
var organizeImportsService = document.GetRequiredLanguageService<IOrganizeImportsService>();
var newDocument = await removeImportsService.RemoveUnnecessaryImportsAsync(document, cancellationToken).ConfigureAwait(false);
var options = await document.GetOrganizeImportsOptionsAsync(cancellationToken).ConfigureAwait(false);
return await organizeImportsService.OrganizeImportsAsync(newDocument, options, cancellationToken).ConfigureAwait(false);
});
}
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