public static InitializerExpressionSyntax ToMultiLine(InitializerExpressionSyntax initializer, CancellationToken cancellationToken)
{
SyntaxNode parent = initializer.Parent;
if (parent.IsKind(SyntaxKind.ObjectCreationExpression) &&
!initializer.IsKind(SyntaxKind.CollectionInitializerExpression))
{
return(initializer
.WithExpressions(
SeparatedList(
initializer.Expressions.Select(expression => expression.WithLeadingTrivia(NewLine())))));
}
else
{
SyntaxTrivia trivia = initializer.GetIndentation(cancellationToken);
SyntaxTriviaList braceTrivia = TriviaList(NewLine(), trivia);
SyntaxTriviaList expressionTrivia = TriviaList(NewLine(), trivia, SingleIndentation(trivia));
return(initializer
.WithExpressions(
SeparatedList(
initializer.Expressions.Select(expression => expression.WithLeadingTrivia(expressionTrivia))))
.WithOpenBraceToken(initializer.OpenBraceToken.WithLeadingTrivia(braceTrivia))
.WithCloseBraceToken(initializer.CloseBraceToken.WithLeadingTrivia(braceTrivia)));
}
}
public override SyntaxNode VisitInitializerExpression(InitializerExpressionSyntax node)
{
if (!node.DescendantTrivia().All(SyntaxUtils.IsWhitespace))
{
return(node); // nothing to do here
}
if (node.IsKind(SyntaxKind.ComplexElementInitializerExpression))
{
return(VisitElementInitializer(node));
}
if (!node.IsKind(SyntaxKind.CollectionInitializerExpression) && !node.IsKind(SyntaxKind.ArrayInitializerExpression))
{
return(node);
}
var indent = node.GetIndentation();
var exprList = node.Expressions;
SyntaxNodeOrToken prevNode = node.OpenBraceToken;
foreach (var nodeOrToken in exprList.GetWithSeparators())
{
if (nodeOrToken.IsNode && prevNode.GetTrailingTrivia().Any(SyntaxKind.EndOfLineTrivia))
{
var tok = nodeOrToken.AsNode().GetFirstToken();
AddChange(tok, tok.WithLeadingWhitespace(indent + '\t'));
}
prevNode = nodeOrToken;
}
if (prevNode.GetTrailingTrivia().Any(SyntaxKind.EndOfLineTrivia))
{
AddChange(node.CloseBraceToken, node.CloseBraceToken.WithLeadingWhitespace(indent));
}
return(base.VisitInitializerExpression(node));
}