|
// 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.Threading;
using Microsoft.CodeAnalysis.CSharp.Extensions.ContextQuery;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.CSharp.Utilities;
using Microsoft.CodeAnalysis.Shared.Extensions;
namespace Microsoft.CodeAnalysis.CSharp.Completion.KeywordRecommenders;
internal class PrivateKeywordRecommender : AbstractSyntacticSingleKeywordRecommender
{
public PrivateKeywordRecommender()
: base(SyntaxKind.PrivateKeyword)
{
}
protected override bool IsValidContext(int position, CSharpSyntaxContext context, CancellationToken cancellationToken)
{
return
(context.IsGlobalStatementContext && context.SyntaxTree.IsScript()) ||
IsValidContextForAccessor(context) ||
IsValidContextForType(context, cancellationToken) ||
IsValidContextForMember(context, cancellationToken);
}
private static bool IsValidContextForAccessor(CSharpSyntaxContext context)
{
if (context.TargetToken.IsAccessorDeclarationContext<PropertyDeclarationSyntax>(context.Position) ||
context.TargetToken.IsAccessorDeclarationContext<IndexerDeclarationSyntax>(context.Position))
{
return CheckPreviousAccessibilityModifiers(context);
}
return false;
}
private static bool IsValidContextForMember(CSharpSyntaxContext context, CancellationToken cancellationToken)
{
if (context.SyntaxTree.IsGlobalMemberDeclarationContext(context.Position, SyntaxKindSet.AllGlobalMemberModifiers, cancellationToken) ||
context.IsMemberDeclarationContext(validModifiers: SyntaxKindSet.AllMemberModifiers, validTypeDeclarations: SyntaxKindSet.ClassInterfaceStructRecordTypeDeclarations, canBePartial: false, cancellationToken: cancellationToken))
{
var modifiers = context.PrecedingModifiers;
// can't have private + abstract/virtual/override/sealed
if (modifiers.Contains(SyntaxKind.AbstractKeyword) ||
modifiers.Contains(SyntaxKind.VirtualKeyword) ||
modifiers.Contains(SyntaxKind.OverrideKeyword) ||
modifiers.Contains(SyntaxKind.SealedKeyword))
{
return false;
}
return CheckPreviousAccessibilityModifiers(context);
}
return false;
}
private static bool IsValidContextForType(CSharpSyntaxContext context, CancellationToken cancellationToken)
{
if (context.IsTypeDeclarationContext(validModifiers: SyntaxKindSet.AllTypeModifiers, validTypeDeclarations: SyntaxKindSet.ClassInterfaceStructRecordTypeDeclarations, canBePartial: false, cancellationToken: cancellationToken))
{
// private things can't be in namespaces.
var typeDecl = context.ContainingTypeDeclaration;
if (typeDecl == null)
{
return false;
}
return CheckPreviousAccessibilityModifiers(context);
}
return false;
}
private static bool CheckPreviousAccessibilityModifiers(CSharpSyntaxContext context)
{
// We can show up after 'protected'.
var precedingModifiers = context.PrecedingModifiers;
return
!precedingModifiers.Contains(SyntaxKind.FileKeyword) &&
!precedingModifiers.Contains(SyntaxKind.PublicKeyword) &&
!precedingModifiers.Contains(SyntaxKind.InternalKeyword) &&
!precedingModifiers.Contains(SyntaxKind.PrivateKeyword);
}
}
|