private static Task <Document> RefactorAsync(
Document document,
ExpressionSyntax expression,
SyntaxList <StatementSyntax> statements,
StatementContainer container,
int statementIndex,
int lastStatementIndex,
CancellationToken cancellationToken)
{
IEnumerable <StatementSyntax> blockStatements = statements
.Skip(statementIndex + 1)
.Take(lastStatementIndex - statementIndex);
IfStatementSyntax ifStatement = CreateNullCheck(expression, List(blockStatements));
if (lastStatementIndex < statements.Count - 1)
{
ifStatement = ifStatement.AppendToTrailingTrivia(NewLine());
}
IEnumerable <StatementSyntax> newStatements = statements.Take(statementIndex + 1)
.Concat(new IfStatementSyntax[] { ifStatement })
.Concat(statements.Skip(lastStatementIndex + 1));
return(document.ReplaceNodeAsync(container.Node, container.NodeWithStatements(newStatements), cancellationToken));
}
private static Task <Document> RefactorAsync(
Document document,
IfStatementSyntax ifStatement,
CancellationToken cancellationToken)
{
return(document.ReplaceNodeAsync(ifStatement, GetNewStatements(), cancellationToken));
IEnumerable <StatementSyntax> GetNewStatements()
{
ElseClauseSyntax parentElse = null;
foreach (IfStatementOrElseClause ifOrElse in ifStatement.AsCascade())
{
if (ifOrElse.IsIf)
{
IfStatementSyntax newIfStatement = ifOrElse.AsIf();
ElseClauseSyntax elseClause = newIfStatement.Else;
newIfStatement = newIfStatement.WithElse(null);
if (parentElse != null)
{
newIfStatement = newIfStatement.PrependToLeadingTrivia(parentElse.GetLeadingTrivia());
}
if (elseClause != null)
{
newIfStatement = newIfStatement.AppendToTrailingTrivia(CSharpFactory.NewLine());
}
yield return(newIfStatement.WithFormatterAnnotation());
parentElse = ifStatement.Else;
}
else
{
StatementSyntax statement = ifOrElse.Statement;
if (statement is BlockSyntax block)
{
foreach (StatementSyntax newStatement in block.Statements.Select(f => f.WithFormatterAnnotation()))
{
yield return(newStatement);
}
}
else
{
yield return(statement);
}
}
}
}
}
private static Task <Document> RefactorAsync(
Document document,
IfStatementSyntax ifStatement,
CancellationToken cancellationToken)
{
var statements = new List <StatementSyntax>();
IfStatementSyntax topIfStatement = ifStatement;
ElseClauseSyntax elseClause = null;
while (true)
{
IfStatementSyntax newIfStatement = ifStatement.WithElse(null);
if (elseClause != null)
{
newIfStatement = newIfStatement.PrependToLeadingTrivia(elseClause.GetLeadingTrivia());
}
newIfStatement = newIfStatement
.AppendToTrailingTrivia(CSharpFactory.NewLine())
.WithFormatterAnnotation();
statements.Add(newIfStatement);
elseClause = ifStatement.Else;
StatementSyntax statement = elseClause.Statement;
SyntaxKind kind = statement.Kind();
if (kind != SyntaxKind.IfStatement)
{
if (kind == SyntaxKind.Block)
{
statements.AddRange(((BlockSyntax)statement).Statements.Select(f => f.WithFormatterAnnotation()));
}
else
{
statements.Add(statement);
}
break;
}
ifStatement = ((IfStatementSyntax)statement);
}
return(document.ReplaceNodeAsync(topIfStatement, statements, cancellationToken));
}