private static IdentifierNameSyntax PadMemberAccess(
SimpleLambdaExpressionSyntax node,
IdentifierNameSyntax memberAccess)
{
// We want to make the new span
var originalSpan = node.GetLocation().GetMappedLineSpan();
// Start by collecting all the trivia 'inside' the expression - we need to tack that on the end, but
// if it ends with a newline, don't include that.
var innerTrivia = SyntaxFactory.TriviaList(node.DescendantTrivia(descendIntoChildren: n => true));
if (innerTrivia.Count > 0 && innerTrivia[innerTrivia.Count - 1].IsKind(SyntaxKind.EndOfLineTrivia))
{
innerTrivia = innerTrivia.RemoveAt(innerTrivia.Count - 1);
}
memberAccess = memberAccess.WithTrailingTrivia(innerTrivia);
// If everything is all on one line, then make sure the spans are the same, to compensate
// for the expression potentially being longer than the variable name.
var lineSpan = originalSpan.EndLinePosition.Line - originalSpan.StartLinePosition.Line;
if (lineSpan == 0)
{
var padding = node.Span.Length - memberAccess.FullSpan.Length;
var trailingTrivia =
SyntaxFactory.TriviaList(memberAccess.GetTrailingTrivia())
.Add(SyntaxFactory.Whitespace(new string(' ', padding)))
.AddRange(node.GetTrailingTrivia());
return
(memberAccess
.WithLeadingTrivia(node.GetLeadingTrivia())
.WithTrailingTrivia(trailingTrivia));
}
else
{
// If everything isn't on the same line, we need to pad out the last line.
var padding =
originalSpan.EndLinePosition.Character -
originalSpan.StartLinePosition.Character;
var trailingTrivia =
SyntaxFactory.TriviaList(memberAccess.GetTrailingTrivia())
.Add(SyntaxFactory.Whitespace(new string(' ', padding)))
.AddRange(node.GetTrailingTrivia());
return
(memberAccess
.WithLeadingTrivia(node.GetLeadingTrivia())
.WithTrailingTrivia(trailingTrivia));
}
}
private static IdentifierNameSyntax PadMemberAccess(
SimpleLambdaExpressionSyntax node,
IdentifierNameSyntax memberAccess)
{
// We want to make the new span
var originalSpan = node.GetLocation().GetMappedLineSpan();
var charactersToExclude = memberAccess.Identifier.Text.Length;
var triviaList = new SyntaxTriviaList();
// Go through each token and
// 1. Append leading trivia
// 2. Append the same number of whitespace as the length of the token text
// 3. Append trailing trivia
foreach (var token in node.DescendantTokens())
{
if (token.HasLeadingTrivia)
{
triviaList = triviaList.AddRange(token.LeadingTrivia);
}
// Need to exclude the length of the member name from the padding.
var padding = token.Text.Length;
if (padding > charactersToExclude)
{
padding -= charactersToExclude;
charactersToExclude = 0;
}
else
{
charactersToExclude -= padding;
padding = 0;
}
if (padding > 0)
{
triviaList = triviaList.Add(SyntaxFactory.Whitespace(new string(' ', padding)));
}
if (token.HasTrailingTrivia)
{
triviaList = triviaList.AddRange(token.TrailingTrivia);
}
}
return(memberAccess
.WithLeadingTrivia(node.GetLeadingTrivia())
.WithTrailingTrivia(triviaList));
}
private SyntaxNode FixSimpleLambda(SimpleLambdaExpressionSyntax lambda)
{
return(lambda.WithoutLeadingTrivia()
.WithAsyncKeyword(s_asyncToken.WithPrependedLeadingTrivia(lambda.GetLeadingTrivia())));
}