private static async Task <InvocationContext> GetInvocation(Document document, LinePosition linePosition,
CancellationToken cancellationToken)
{
var text = await document.GetTextAsync(cancellationToken);
var position = Math.Max(text.Lines.GetPosition(linePosition.ToCodeAnalysisLinePosition()) - 1, 0); // backtrack into the actual invocation
var tree = await document.GetSyntaxTreeAsync(cancellationToken);
var root = await tree.GetRootAsync(cancellationToken);
var node = root.FindToken(position).Parent;
// Walk up until we find a node that we're interested in.
while (node is not null)
{
if (node is InvocationExpressionSyntax invocation && invocation.ArgumentList.Span.Contains(position))
{
var semanticModel = await document.GetSemanticModelAsync(cancellationToken);
return(new InvocationContext(semanticModel, position, invocation.Expression, invocation.ArgumentList, invocation.IsInStaticContext()));
}
if (node is ObjectCreationExpressionSyntax objectCreation && objectCreation.ArgumentList.Span.Contains(position))
{
var semanticModel = await document.GetSemanticModelAsync(cancellationToken);
return(new InvocationContext(semanticModel, position, objectCreation, objectCreation.ArgumentList, objectCreation.IsInStaticContext()));
}
if (node is AttributeSyntax attributeSyntax && attributeSyntax.ArgumentList.Span.Contains(position))
{
var semanticModel = await document.GetSemanticModelAsync(cancellationToken);
return(new InvocationContext(semanticModel, position, attributeSyntax, attributeSyntax.ArgumentList, attributeSyntax.IsInStaticContext()));
}
node = node.Parent;
}
return(null);
}