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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;
using Microsoft.CodeAnalysis.Shared.Extensions;
namespace Microsoft.CodeAnalysis.CSharp.Completion.KeywordRecommenders;
internal sealed class EventKeywordRecommender() : AbstractSyntacticSingleKeywordRecommender(SyntaxKind.EventKeyword)
{
private static readonly ISet<SyntaxKind> s_validClassModifiers = new HashSet<SyntaxKind>(SyntaxFacts.EqualityComparer)
{
SyntaxKind.NewKeyword,
SyntaxKind.PublicKeyword,
SyntaxKind.ProtectedKeyword,
SyntaxKind.InternalKeyword,
SyntaxKind.PrivateKeyword,
SyntaxKind.StaticKeyword,
SyntaxKind.VirtualKeyword,
SyntaxKind.SealedKeyword,
SyntaxKind.OverrideKeyword,
SyntaxKind.AbstractKeyword,
SyntaxKind.ExternKeyword,
SyntaxKind.UnsafeKeyword
};
private static readonly ISet<SyntaxKind> s_validStructModifiers = new HashSet<SyntaxKind>(s_validClassModifiers, SyntaxFacts.EqualityComparer)
{
SyntaxKind.ReadOnlyKeyword,
};
protected override bool IsValidContext(int position, CSharpSyntaxContext context, CancellationToken cancellationToken)
{
var syntaxTree = context.SyntaxTree;
return
(context.IsGlobalStatementContext && syntaxTree.IsScript()) ||
syntaxTree.IsGlobalMemberDeclarationContext(position, SyntaxKindSet.AllGlobalMemberModifiers, cancellationToken) ||
context.IsMemberDeclarationContext(validModifiers: s_validClassModifiers, validTypeDeclarations: SyntaxKindSet.ClassInterfaceRecordTypeDeclarations, canBePartial: false, cancellationToken: cancellationToken) ||
context.IsMemberDeclarationContext(validModifiers: s_validStructModifiers, validTypeDeclarations: SyntaxKindSet.StructOnlyTypeDeclarations, canBePartial: false, cancellationToken: cancellationToken) ||
context.IsMemberAttributeContext(SyntaxKindSet.ClassInterfaceStructRecordTypeDeclarations, includingRecordParameters: false, cancellationToken);
}
}
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