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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.Collections.Immutable
Imports System.Threading
Imports Microsoft.CodeAnalysis.Completion.Providers
Imports Microsoft.CodeAnalysis.VisualBasic.Extensions.ContextQuery
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
Namespace Microsoft.CodeAnalysis.VisualBasic.Completion.KeywordRecommenders.Statements
''' <summary>
''' Recommends the "While" and "Until" keywords as a part of a Do or Loop statements
''' </summary>
Friend Class UntilAndWhileKeywordRecommender
Inherits AbstractKeywordRecommender
Protected Overrides Function RecommendKeywords(context As VisualBasicSyntaxContext, cancellationToken As CancellationToken) As ImmutableArray(Of RecommendedKeyword)
If context.FollowsEndOfStatement Then
Return ImmutableArray(Of RecommendedKeyword).Empty
End If
Dim targetToken = context.TargetToken
If (targetToken.Kind = SyntaxKind.DoKeyword AndAlso TypeOf targetToken.Parent Is DoStatementSyntax) OrElse
(targetToken.Kind = SyntaxKind.LoopKeyword AndAlso
TypeOf targetToken.Parent Is LoopStatementSyntax AndAlso
targetToken.Parent.Parent.IsKind(SyntaxKind.SimpleDoLoopBlock, SyntaxKind.DoLoopWhileBlock, SyntaxKind.DoLoopUntilBlock)) Then
Return ImmutableArray.Create(
New RecommendedKeyword("Until", If(targetToken.Kind = SyntaxKind.LoopKeyword,
VBFeaturesResources.Repeats_a_block_of_statements_until_a_Boolean_condition_becomes_true_Do_Loop_Until_condition,
VBFeaturesResources.Repeats_a_block_of_statements_until_a_Boolean_condition_becomes_true_Do_Until_condition_Loop)),
New RecommendedKeyword("While", If(targetToken.Kind = SyntaxKind.LoopKeyword,
VBFeaturesResources.Repeats_a_block_of_statements_while_a_Boolean_condition_is_true_Do_Loop_While_condition,
VBFeaturesResources.Repeats_a_block_of_statements_while_a_Boolean_condition_is_true_Do_While_condition_Loop)))
Else
Return ImmutableArray(Of RecommendedKeyword).Empty
End If
End Function
End Class
End Namespace
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