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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.BraceMatching
Imports Microsoft.CodeAnalysis.Host.Mef
Imports Microsoft.CodeAnalysis.Text
Namespace Microsoft.CodeAnalysis.VisualBasic.BraceMatching
<ExportBraceMatcher(LanguageNames.VisualBasic), [Shared]>
Friend Class StringLiteralBraceMatcher
Implements IBraceMatcher
<ImportingConstructor>
<Obsolete(MefConstruction.ImportingConstructorMessage, True)>
Public Sub New()
End Sub
Public Async Function FindBraces(document As Document,
position As Integer,
options As BraceMatchingOptions,
cancellationToken As CancellationToken) As Task(Of BraceMatchingResult?) Implements IBraceMatcher.FindBracesAsync
Dim root = Await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(False)
Dim token = root.FindToken(position)
If position = token.SpanStart OrElse position = token.Span.End - 1 Then
If token.Kind = SyntaxKind.StringLiteralToken AndAlso Not token.ContainsDiagnostics Then
Return New BraceMatchingResult(
New TextSpan(token.SpanStart, 1),
New TextSpan(token.Span.End - 1, 1))
End If
End If
Return Nothing
End Function
End Class
End Namespace
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