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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.Queries
''' <summary>
''' Recommends the "Ascending" and "Descending" contextual keywords in a Order By clause.
''' </summary>
Friend Class AscendingDescendingKeywordRecommender
Inherits AbstractKeywordRecommender
Private Shared ReadOnly s_keywords As ImmutableArray(Of RecommendedKeyword) = ImmutableArray.Create(
New RecommendedKeyword("Ascending", VBFeaturesResources.Specifies_the_sort_order_for_an_Order_By_clause_in_a_query_The_smallest_element_will_appear_first),
New RecommendedKeyword("Descending", VBFeaturesResources.Specifies_the_sort_order_for_an_Order_By_clause_in_a_query_The_largest_element_will_appear_first))
Protected Overrides Function RecommendKeywords(context As VisualBasicSyntaxContext, cancellationToken As CancellationToken) As ImmutableArray(Of RecommendedKeyword)
Return If(context.SyntaxTree.IsFollowingCompleteExpression(Of OrderingSyntax)(context.Position, context.TargetToken, Function(orderingSyntax) orderingSyntax.Expression, cancellationToken),
s_keywords,
ImmutableArray(Of RecommendedKeyword).Empty)
End Function
End Class
End Namespace
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