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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.Collections.Generic;
using System.Threading;
using Microsoft.CodeAnalysis.CSharp.Extensions.ContextQuery;
using Microsoft.CodeAnalysis.CSharp.Utilities;
namespace Microsoft.CodeAnalysis.CSharp.Completion.KeywordRecommenders;
internal class ClassKeywordRecommender : AbstractSyntacticSingleKeywordRecommender
{
private static readonly ISet<SyntaxKind> s_validModifiers = new HashSet<SyntaxKind>(SyntaxFacts.EqualityComparer)
{
SyntaxKind.NewKeyword,
SyntaxKind.PublicKeyword,
SyntaxKind.ProtectedKeyword,
SyntaxKind.InternalKeyword,
SyntaxKind.PrivateKeyword,
SyntaxKind.AbstractKeyword,
SyntaxKind.SealedKeyword,
SyntaxKind.StaticKeyword,
SyntaxKind.UnsafeKeyword,
SyntaxKind.FileKeyword,
};
public ClassKeywordRecommender()
: base(SyntaxKind.ClassKeyword)
{
}
protected override bool IsValidContext(int position, CSharpSyntaxContext context, CancellationToken cancellationToken)
{
var syntaxTree = context.SyntaxTree;
return
context.IsGlobalStatementContext ||
context.IsTypeDeclarationContext(
validModifiers: s_validModifiers,
validTypeDeclarations: SyntaxKindSet.ClassInterfaceStructRecordTypeDeclarations,
canBePartial: true,
cancellationToken: cancellationToken) ||
context.IsRecordDeclarationContext(s_validModifiers, cancellationToken) ||
syntaxTree.IsTypeParameterConstraintStartContext(position, context.LeftToken);
}
}
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