public override async Task <TextChange?> GetTextChangeAsync(Document document, CompletionItem selectedItem, char?ch, CancellationToken cancellationToken)
{
string insertionText;
if (ch == null)
{
insertionText = SymbolCompletionItem.GetInsertionText(selectedItem);
}
else
{
var position = SymbolCompletionItem.GetContextPosition(selectedItem);
var context = await this.CreateContext(document, position, cancellationToken).ConfigureAwait(false);
var symbols = await SymbolCompletionItem.GetSymbolsAsync(selectedItem, document, cancellationToken).ConfigureAwait(false);
if (symbols.Length > 0)
{
insertionText = GetInsertionText(symbols[0], context, ch.Value);
}
else
{
insertionText = selectedItem.DisplayText;
}
}
return(new TextChange(selectedItem.Span, insertionText));
}
private async Task <Document> GenerateMemberAndUsingsAsync(
Document document,
CompletionItem completionItem,
TextLine line,
CancellationToken cancellationToken)
{
var codeGenService = document.GetLanguageService <ICodeGenerationService>();
// Resolve member and type in our new, forked, solution
var semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var containingType = semanticModel.GetEnclosingSymbol <INamedTypeSymbol>(line.Start, cancellationToken);
var symbols = await SymbolCompletionItem.GetSymbolsAsync(completionItem, document, cancellationToken).ConfigureAwait(false);
var overriddenMember = symbols.FirstOrDefault();
if (overriddenMember == null)
{
// Unfortunately, SymbolKey resolution failed. Bail.
return(null);
}
// CodeGenerationOptions containing before and after
var options = new CodeGenerationOptions(
contextLocation: semanticModel.SyntaxTree.GetLocation(TextSpan.FromBounds(line.Start, line.Start)),
options: await document.GetOptionsAsync(cancellationToken).ConfigureAwait(false));
var generatedMember = await GenerateMemberAsync(overriddenMember, containingType, document, completionItem, cancellationToken).ConfigureAwait(false);
generatedMember = _annotation.AddAnnotationToSymbol(generatedMember);
Document memberContainingDocument = null;
if (generatedMember.Kind == SymbolKind.Method)
{
memberContainingDocument = await codeGenService.AddMethodAsync(document.Project.Solution, containingType, (IMethodSymbol)generatedMember, options, cancellationToken).ConfigureAwait(false);
}
else if (generatedMember.Kind == SymbolKind.Property)
{
memberContainingDocument = await codeGenService.AddPropertyAsync(document.Project.Solution, containingType, (IPropertySymbol)generatedMember, options, cancellationToken).ConfigureAwait(false);
}
else if (generatedMember.Kind == SymbolKind.Event)
{
memberContainingDocument = await codeGenService.AddEventAsync(document.Project.Solution, containingType, (IEventSymbol)generatedMember, options, cancellationToken).ConfigureAwait(false);
}
return(memberContainingDocument);
}
public static Task <ImmutableArray <ISymbol> > GetSymbolsAsync(CompletionItem item, Document document, CancellationToken cancellationToken)
{
return(SymbolCompletionItem.GetSymbolsAsync(item, document, cancellationToken));
}