|
// 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.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.LanguageService;
using Microsoft.CodeAnalysis.Shared.Extensions;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.Completion.Providers;
internal abstract class AbstractPreprocessorCompletionProvider : LSPCompletionProvider
{
public sealed override async Task ProvideCompletionsAsync(CompletionContext context)
{
var cancellationToken = context.CancellationToken;
var originatingDocument = context.Document;
var position = context.Position;
var solution = originatingDocument.Project.Solution;
var syntaxContext = await context.GetSyntaxContextWithExistingSpeculativeModelAsync(originatingDocument, cancellationToken).ConfigureAwait(false);
if (!syntaxContext.IsPreProcessorExpressionContext)
return;
// Walk all the projects this document is linked in so that we get the full set of preprocessor symbols
// defined across all of them.
var syntaxFacts = originatingDocument.GetRequiredLanguageService<ISyntaxFactsService>();
var preprocessorNames = new HashSet<string>(syntaxFacts.StringComparer);
foreach (var documentId in solution.GetRelatedDocumentIds(originatingDocument.Id))
{
var document = solution.GetRequiredDocument(documentId);
var currentSyntaxTree = await document.GetRequiredSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
preprocessorNames.AddRange(currentSyntaxTree.Options.PreprocessorSymbolNames);
}
// Keep all the preprocessor symbol names together. We don't want to intermingle them with any keywords we
// include (like `true/false`)
foreach (var name in preprocessorNames.OrderBy(a => a))
{
context.AddItem(CommonCompletionItem.Create(
name,
displayTextSuffix: "",
CompletionItemRules.Default,
glyph: Glyph.Keyword,
sortText: "_0_" + name));
}
}
}
|