src/VisualStudio/CSharp/Impl/Interactive/CSharpInteractiveWindowCommandCompletionProvider.cs - main - githubmirror/roslyn

src/VisualStudio/CSharp/Impl/Interactive/CSharpInteractiveWindowCommandCompletionProvider.cs

50 строк2 KB

Cyrus Najmabadi

Use file scoped namespaces. (#77854)

27 мар 2025, 09:55

27 мар 2025, 09:5598d41b8

// 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.ComponentModel.Composition;
using System.Threading;
using Microsoft.CodeAnalysis.Completion;
using Microsoft.CodeAnalysis.CSharp.Extensions;
using Microsoft.CodeAnalysis.Editor;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Interactive;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Microsoft.CodeAnalysis.Text;
using Microsoft.VisualStudio.InteractiveWindow;
using Microsoft.VisualStudio.Text.Editor;
using Microsoft.VisualStudio.Utilities;

namespace Microsoft.CodeAnalysis.CSharp.Completion.Providers;

/// <summary>
/// Provides completion items for Interactive Window commands (such as #help, #cls, etc.) at the start of a C# language buffer.
/// </summary>
[ExportCompletionProviderMef1("ReplCommandCompletionProvider", LanguageNames.CSharp)]
[TextViewRole(PredefinedInteractiveTextViewRoles.InteractiveTextViewRole)]
[Order(Before = PredefinedCompletionProviderNames.Keyword)]
internal sealed class CSharpInteractiveWindowCommandCompletionProvider : AbstractInteractiveWindowCommandCompletionProvider
{
    [ImportingConstructor]
    [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
    public CSharpInteractiveWindowCommandCompletionProvider()
    {
    }

    internal override string Language
        => LanguageNames.CSharp;

    protected override string GetCompletionString(string commandName)
        => commandName;

    public override bool IsInsertionTrigger(SourceText text, int characterPosition, CompletionOptions options)
        => CompletionUtilities.IsTriggerAfterSpaceOrStartOfWordCharacter(text, characterPosition, options);

    public override ImmutableHashSet<char> TriggerCharacters { get; } = CompletionUtilities.SpaceTriggerCharacter;

    protected override bool ShouldDisplayCommandCompletions(SyntaxTree tree, int position, CancellationToken cancellationToken)
        => tree.IsBeforeFirstToken(position, cancellationToken) &&
           tree.IsPreProcessorKeywordContext(position, cancellationToken);
}