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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.
Imports System.Composition
Imports System.Threading
Imports Microsoft.CodeAnalysis
Imports Microsoft.CodeAnalysis.BraceCompletion
Imports Microsoft.CodeAnalysis.Host.Mef
Imports Microsoft.CodeAnalysis.Text
Imports Microsoft.CodeAnalysis.VisualBasic
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
Namespace Microsoft.CodeAnalysis.VisualBasic.BraceCompletion
<ExportBraceCompletionService(LanguageNames.VisualBasic), [Shared]>
Friend Class ParenthesisBraceCompletionService
Inherits AbstractVisualBasicBraceCompletionService
<ImportingConstructor>
<Obsolete(MefConstruction.ImportingConstructorMessage, True)>
Public Sub New()
MyBase.New()
End Sub
Protected Overrides ReadOnly Property OpeningBrace As Char = Parenthesis.OpenCharacter
Protected Overrides ReadOnly Property ClosingBrace As Char = Parenthesis.CloseCharacter
Protected Overrides Function IsValidOpeningBraceToken(token As SyntaxToken) As Boolean
Return token.IsKind(SyntaxKind.OpenParenToken)
End Function
Protected Overrides Function IsValidClosingBraceToken(token As SyntaxToken) As Boolean
Return token.IsKind(SyntaxKind.CloseParenToken)
End Function
Protected Overrides Function IsValidOpenBraceTokenAtPosition(text As SourceText, token As SyntaxToken, position As Integer) As Boolean
If Not IsValidOpeningBraceToken(token) OrElse
position <> token.SpanStart Then
Return False
End If
Dim skippedTriviaNode = TryCast(token.Parent, SkippedTokensTriviaSyntax)
If skippedTriviaNode IsNot Nothing Then
Dim skippedToken = skippedTriviaNode.ParentTrivia.Token
' These checks don't make any sense. Leaving them in place to avoid breaking something as part of this move.
If skippedToken.Kind <> SyntaxKind.CloseParenToken OrElse Not TypeOf skippedToken.Parent Is BinaryConditionalExpressionSyntax Then
Return False
End If
End If
Return True
End Function
Public Overrides Function AllowOverType(context As BraceCompletionContext, cancellationToken As CancellationToken) As Boolean
Return AllowOverTypeInUserCodeWithValidClosingToken(context, cancellationToken)
End Function
End Class
End Namespace
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