public static Task <Document> RefactorAsync(
Document document,
ConditionalExpressionSyntax conditionalExpression,
CancellationToken cancellationToken)
{
ExpressionSyntax condition = conditionalExpression.Condition;
ExpressionSyntax whenTrue = conditionalExpression.WhenTrue;
ExpressionSyntax whenFalse = conditionalExpression.WhenFalse;
SyntaxToken questionToken = conditionalExpression.QuestionToken;
SyntaxToken colonToken = conditionalExpression.ColonToken;
var writer = new NodeWriter(conditionalExpression);
writer.WriteLeadingTrivia();
writer.WriteSpan(condition);
Write(condition, whenTrue, questionToken, "? ", writer);
Write(whenTrue, whenFalse, colonToken, ": ", writer);
writer.WriteTrailingTrivia();
ExpressionSyntax newNode = SyntaxFactory.ParseExpression(writer.ToString());
return(document.ReplaceNodeAsync(conditionalExpression, newNode, cancellationToken));
}
private static void Write(
ExpressionSyntax expression,
ExpressionSyntax nextExpression,
SyntaxToken token,
string newText,
NodeWriter writer)
{
if (IsFixable(expression, token))
{
if (expression.GetTrailingTrivia().Any(f => !f.IsWhitespaceOrEndOfLineTrivia()) ||
token.LeadingTrivia.Any(f => !f.IsWhitespaceOrEndOfLineTrivia()))
{
writer.WriteTrailingTrivia(expression);
writer.WriteLeadingTrivia(token);
}
writer.WriteTrailingTrivia(token);
writer.WriteLeadingTrivia(nextExpression);
writer.Write(newText);
writer.WriteSpan(nextExpression);
}
else
{
writer.WriteTrailingTrivia(expression);
writer.WriteFullSpan(token);
writer.WriteLeadingTriviaAndSpan(nextExpression);
}
}