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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.Composition
Imports System.Threading
Imports Microsoft.CodeAnalysis.Completion
Imports Microsoft.CodeAnalysis.Completion.Providers
Imports Microsoft.CodeAnalysis.Host.Mef
Imports Microsoft.CodeAnalysis.Options
Imports Microsoft.CodeAnalysis.Text
Imports Microsoft.CodeAnalysis.VisualBasic.Extensions.ContextQuery
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax
Namespace Microsoft.CodeAnalysis.VisualBasic.Completion.Providers
<ExportCompletionProvider(NameOf(PartialTypeCompletionProvider), LanguageNames.VisualBasic)>
<ExtensionOrder(After:=NameOf(HandlesClauseCompletionProvider))>
<[Shared]>
Partial Friend Class PartialTypeCompletionProvider
Inherits AbstractPartialTypeCompletionProvider(Of VisualBasicSyntaxContext)
Private Const InsertionTextOnOpenParen As String = NameOf(InsertionTextOnOpenParen)
Private Shared ReadOnly _insertionTextFormatWithGenerics As SymbolDisplayFormat =
New SymbolDisplayFormat(
globalNamespaceStyle:=SymbolDisplayGlobalNamespaceStyle.Omitted,
typeQualificationStyle:=SymbolDisplayTypeQualificationStyle.NameAndContainingTypesAndNamespaces,
miscellaneousOptions:=
SymbolDisplayMiscellaneousOptions.EscapeKeywordIdentifiers Or
SymbolDisplayMiscellaneousOptions.UseSpecialTypes,
genericsOptions:=
SymbolDisplayGenericsOptions.IncludeTypeParameters Or
SymbolDisplayGenericsOptions.IncludeVariance Or
SymbolDisplayGenericsOptions.IncludeTypeConstraints)
Private Shared ReadOnly _displayTextFormat As SymbolDisplayFormat =
_insertionTextFormatWithGenerics.RemoveMiscellaneousOptions(SymbolDisplayMiscellaneousOptions.EscapeKeywordIdentifiers)
<ImportingConstructor>
<Obsolete(MefConstruction.ImportingConstructorMessage, True)>
Public Sub New()
End Sub
Friend Overrides ReadOnly Property Language As String
Get
Return LanguageNames.VisualBasic
End Get
End Property
Public Overrides Function IsInsertionTrigger(text As SourceText, characterPosition As Integer, options As CompletionOptions) As Boolean
Return CompletionUtilities.IsDefaultTriggerCharacter(text, characterPosition, options)
End Function
Public Overrides ReadOnly Property TriggerCharacters As ImmutableHashSet(Of Char) = CompletionUtilities.CommonTriggerChars
Protected Overrides Function GetPartialTypeSyntaxNode(tree As SyntaxTree, position As Integer, cancellationToken As CancellationToken) As SyntaxNode
Dim statement As TypeStatementSyntax = Nothing
Return If(tree.IsPartialTypeDeclarationNameContext(position, cancellationToken, statement), statement, Nothing)
End Function
Protected Overrides Function GetDisplayAndSuffixAndInsertionText(symbol As INamedTypeSymbol, context As VisualBasicSyntaxContext) As (displayText As String, suffix As String, insertionText As String)
Dim displayText = symbol.ToMinimalDisplayString(context.SemanticModel, context.Position, format:=_displayTextFormat)
Dim insertionText = symbol.ToMinimalDisplayString(context.SemanticModel, context.Position, format:=_insertionTextFormatWithGenerics)
Return (displayText, "", insertionText)
End Function
Protected Overrides Function GetProperties(symbol As INamedTypeSymbol, context As VisualBasicSyntaxContext) As ImmutableArray(Of KeyValuePair(Of String, String))
Return ImmutableArray.Create(
New KeyValuePair(Of String, String)(InsertionTextOnOpenParen, symbol.Name.EscapeIdentifier()))
End Function
Public Overrides Async Function GetTextChangeAsync(document As Document, selectedItem As CompletionItem, ch As Char?, cancellationToken As CancellationToken) As Task(Of TextChange?)
If ch = "("c Then
Dim insertionText As String = Nothing
If selectedItem.TryGetProperty(InsertionTextOnOpenParen, insertionText) Then
Return New TextChange(selectedItem.Span, insertionText)
End If
End If
Return Await MyBase.GetTextChangeAsync(document, selectedItem, ch, cancellationToken).ConfigureAwait(False)
End Function
End Class
End Namespace
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