private void DoTestAddInsertRemoveReplaceOnEmptyList(SyntaxTriviaList list)
{
Assert.Equal(0, list.Count);
var triviaD = SyntaxFactory.ParseLeadingTrivia("/*D*/")[0];
var triviaE = SyntaxFactory.ParseLeadingTrivia("/*E*/")[0];
var newList = list.Add(triviaD);
Assert.Equal(1, newList.Count);
Assert.Equal("/*D*/", newList.ToFullString());
newList = list.AddRange(new[] { triviaD, triviaE });
Assert.Equal(2, newList.Count);
Assert.Equal("/*D*//*E*/", newList.ToFullString());
newList = list.Insert(0, triviaD);
Assert.Equal(1, newList.Count);
Assert.Equal("/*D*/", newList.ToFullString());
newList = list.InsertRange(0, new[] { triviaD, triviaE });
Assert.Equal(2, newList.Count);
Assert.Equal("/*D*//*E*/", newList.ToFullString());
newList = list.Remove(triviaD);
Assert.Equal(0, newList.Count);
Assert.Equal(-1, list.IndexOf(triviaD));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveAt(0));
Assert.Throws <ArgumentOutOfRangeException>(() => list.Insert(1, triviaD));
Assert.Throws <ArgumentOutOfRangeException>(() => list.Insert(-1, triviaD));
Assert.Throws <ArgumentOutOfRangeException>(
() => list.InsertRange(1, new[] { triviaD })
);
Assert.Throws <ArgumentOutOfRangeException>(
() => list.InsertRange(-1, new[] { triviaD })
);
Assert.Throws <ArgumentOutOfRangeException>(() => list.Replace(triviaD, triviaE));
Assert.Throws <ArgumentOutOfRangeException>(
() => list.ReplaceRange(triviaD, new[] { triviaE })
);
Assert.Throws <ArgumentOutOfRangeException>(() => list.Add(default(SyntaxTrivia)));
Assert.Throws <ArgumentOutOfRangeException>(() => list.Insert(0, default(SyntaxTrivia)));
Assert.Throws <ArgumentNullException>(
() => list.AddRange((IEnumerable <SyntaxTrivia>)null)
);
Assert.Throws <ArgumentNullException>(
() => list.InsertRange(0, (IEnumerable <SyntaxTrivia>)null)
);
}
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 static void AddIfNotWhiteSpaceOrEndOfLine(IEnumerable <SyntaxTrivia> trivia, ref SyntaxTriviaList triviaList)
{
if (trivia.Any(f => !f.IsWhitespaceOrEndOfLineTrivia()))
{
triviaList = triviaList.AddRange(trivia);
}
}
public static SyntaxToken WithPrependedLeadingTrivia(this SyntaxToken token, IEnumerable <SyntaxTrivia> trivia)
{
var list = new SyntaxTriviaList();
list = list.AddRange(trivia);
return(token.WithPrependedLeadingTrivia(list));
}
public static T WithPrependedLeadingTrivia <T>(this T node, IEnumerable <SyntaxTrivia> trivia) where T : SyntaxNode
{
var list = new SyntaxTriviaList();
list = list.AddRange(trivia);
return(node.WithPrependedLeadingTrivia(list));
}
public override SyntaxNode VisitMemberAccessExpression(MemberAccessExpressionSyntax node)
{
if (node.OperatorToken.TrailingTrivia.Count != 0)
{
SyntaxTriviaList trivia = node.Name.GetLeadingTrivia();
trivia = trivia.AddRange(node.OperatorToken.TrailingTrivia);
node = node.WithName(node.Name.WithLeadingTrivia(trivia));
node = node.WithOperatorToken(node.OperatorToken.WithTrailingTrivia());
}
return(base.VisitMemberAccessExpression(node));
}
public static async Task <Document> RefactorAsync(
Document document,
BinaryExpressionSyntax binaryExpression,
CancellationToken cancellationToken)
{
ExpressionSyntax left = binaryExpression.Left;
ExpressionSyntax right = binaryExpression.Right;
SyntaxToken operatorToken = binaryExpression.OperatorToken;
ExpressionSyntax newNode = binaryExpression;
TextSpan span = TextSpan.FromBounds(left.Span.End, right.Span.Start);
IEnumerable <SyntaxTrivia> trivia = binaryExpression.DescendantTrivia(span);
bool isWhiteSpaceOrEndOfLine = trivia.All(f => f.IsWhitespaceOrEndOfLineTrivia());
if (left.IsBooleanLiteralExpression())
{
SyntaxTriviaList leadingTrivia = binaryExpression.GetLeadingTrivia();
if (!isWhiteSpaceOrEndOfLine)
{
leadingTrivia = leadingTrivia.AddRange(trivia);
}
newNode = right
.Negate()
.WithLeadingTrivia(leadingTrivia);
}
else if (right.IsBooleanLiteralExpression())
{
SyntaxTriviaList trailingTrivia = binaryExpression.GetTrailingTrivia();
if (!isWhiteSpaceOrEndOfLine)
{
trailingTrivia = trailingTrivia.InsertRange(0, trivia);
}
newNode = left
.Negate()
.WithTrailingTrivia(trailingTrivia);
}
#if DEBUG
else
{
Debug.Assert(false, binaryExpression.ToString());
}
#endif
return(await document.ReplaceNodeAsync(binaryExpression, newNode.WithFormatterAnnotation(), cancellationToken).ConfigureAwait(false));
}
private static SyntaxNode FormatNodeRecursive(SyntaxNode node, SyntaxTriviaList startTrivia, bool useTabs, int tabsSize, int depth)
{
var newTrivia = useTabs ? startTrivia.AddRange(Enumerable.Repeat(SyntaxFactory.Tab, depth)) :
startTrivia.AddRange(Enumerable.Repeat(SyntaxFactory.Space, depth * tabsSize));
switch (node.Kind())
{
case SyntaxKind.Block:
return(FormatBlock(node as BlockSyntax, startTrivia, useTabs, tabsSize));
default:
var newNode = node;
if (node.HasLeadingTrivia && node.GetLeadingTrivia()[0].IsKind(SyntaxKind.EndOfLineTrivia))
{
newNode = newNode.WithLeadingTrivia(startTrivia);
}
else
{
var prev = node.GetFirstToken().GetPreviousToken();
if (prev.TrailingTrivia.Count > 0 && prev.TrailingTrivia.Last().IsKind(SyntaxKind.EndOfLineTrivia))
{
newNode = newNode.WithLeadingTrivia(startTrivia);
}
}
newNode = newNode.ReplaceNodes(newNode.ChildNodes(), (old, potential) => FormatNodeRecursive(old, newTrivia, useTabs, tabsSize, depth++));
newNode = newNode
.ReplaceTokens(
newNode.ChildTokens().Where(x => x.LeadingTrivia.Count > 0 && x.LeadingTrivia[0].IsKind(SyntaxKind.EndOfLineTrivia)),
(old, potential) =>
{
return(old.WithLeadingTrivia(newTrivia));
});
return(newNode);
}
}
public static Task <Document> RefactorAsync(
Document document,
BinaryExpressionSyntax binaryExpression,
CancellationToken cancellationToken)
{
ExpressionSyntax left = binaryExpression.Left;
ExpressionSyntax right = binaryExpression.Right;
ExpressionSyntax newNode = binaryExpression;
TextSpan span = TextSpan.FromBounds(left.Span.End, right.SpanStart);
IEnumerable <SyntaxTrivia> trivia = binaryExpression.DescendantTrivia(span);
bool isWhiteSpaceOrEndOfLine = trivia.All(f => f.IsWhitespaceOrEndOfLineTrivia());
if (IsBooleanLiteralExpression(left.Kind()))
{
SyntaxTriviaList leadingTrivia = binaryExpression.GetLeadingTrivia();
if (!isWhiteSpaceOrEndOfLine)
{
leadingTrivia = leadingTrivia.AddRange(trivia);
}
newNode = right.WithLeadingTrivia(leadingTrivia);
}
else if (IsBooleanLiteralExpression(right.Kind()))
{
SyntaxTriviaList trailingTrivia = binaryExpression.GetTrailingTrivia();
if (!isWhiteSpaceOrEndOfLine)
{
trailingTrivia = trailingTrivia.InsertRange(0, trivia);
}
newNode = left.WithTrailingTrivia(trailingTrivia);
}
else
{
SyntaxDebug.Fail(binaryExpression);
}
return(document.ReplaceNodeAsync(binaryExpression, newNode.WithFormatterAnnotation(), cancellationToken));
}
private static BlockSyntax FormatBlock(BlockSyntax block, SyntaxTriviaList startTrivia, bool useTabs, int tabSize)
{
var statementTrivia = useTabs ? startTrivia.Add(SyntaxFactory.Tab) :
startTrivia.AddRange(Enumerable.Repeat(SyntaxFactory.Space, tabSize));
var prevToken = block.OpenBraceToken.GetPreviousToken();
var newBlock = block.Update(
block.OpenBraceToken
.WithLeadingTrivia(startTrivia)
.WithTrailingTrivia(block.OpenBraceToken.TrailingTrivia.AddTrailingEndOfLineIfNotExist()),
SyntaxFactory.List(block.Statements.Select(st => IndentationHelper.FormatNodeRecursive(st, statementTrivia, useTabs, tabSize).WithTrailingTrivia(st.GetTrailingTrivia().AddTrailingEndOfLineIfNotExist()))),
block.CloseBraceToken.WithLeadingTrivia(startTrivia));
if (prevToken != null && prevToken.TrailingTrivia.Any(SyntaxKind.EndOfLineTrivia) == false)
{
return(newBlock = newBlock.WithLeadingTrivia(newBlock.GetLeadingTrivia().AddLeadingEndOfLineIfNotExist()));
}
return(newBlock);
}
private SyntaxTriviaList RemoveRedundantTrailingWhitespace(SyntaxTriviaList oldTriviaList)
{
var newTriviaList = new List <SyntaxTrivia>();
var outSyntaxTriviaList = new SyntaxTriviaList();
for (var i = 0; i < oldTriviaList.Count; ++i)
{
var isRedundantWhitespace =
i + 1 < oldTriviaList.Count &&
oldTriviaList[i].IsKind(SyntaxKind.WhitespaceTrivia) &&
oldTriviaList[i + 1].IsKind(SyntaxKind.EndOfLineTrivia);
if (!isRedundantWhitespace)
{
newTriviaList.Add(oldTriviaList[i]);
}
}
outSyntaxTriviaList = outSyntaxTriviaList.AddRange(newTriviaList);
return(outSyntaxTriviaList);
}
private AttributeListSyntax CreateAttributeList(
ISymbol targetSymbol,
Diagnostic diagnostic,
bool isAssemblyAttribute,
SyntaxTriviaList leadingTrivia,
bool needsLeadingEndOfLine)
{
var attributeArguments = CreateAttributeArguments(targetSymbol, diagnostic, isAssemblyAttribute);
var attribute = SyntaxFactory.Attribute(SyntaxFactory.ParseName(SuppressMessageAttributeName), attributeArguments)
.WithAdditionalAnnotations(Simplifier.Annotation);
var attributes = new SeparatedSyntaxList<AttributeSyntax>().Add(attribute);
AttributeListSyntax attributeList;
if (isAssemblyAttribute)
{
var targetSpecifier = SyntaxFactory.AttributeTargetSpecifier(SyntaxFactory.Token(SyntaxKind.AssemblyKeyword));
attributeList = SyntaxFactory.AttributeList(targetSpecifier, attributes);
}
else
{
attributeList = SyntaxFactory.AttributeList(attributes);
}
var endOfLineTrivia = SyntaxFactory.EndOfLine(@"
");
var triviaList = SyntaxFactory.TriviaList();
if (needsLeadingEndOfLine)
{
triviaList = triviaList.Add(endOfLineTrivia);
}
return attributeList
.WithLeadingTrivia(leadingTrivia.AddRange(triviaList))
.WithAdditionalAnnotations(Formatter.Annotation);
}
private AttributeListSyntax CreateAttributeList(
ISymbol targetSymbol,
Diagnostic diagnostic,
SyntaxTriviaList leadingTrivia,
bool needsLeadingEndOfLine)
{
var attributeArguments = CreateAttributeArguments(targetSymbol, diagnostic);
var attribute = SyntaxFactory.Attribute(SyntaxFactory.ParseName(SuppressMessageAttributeName), attributeArguments);
var attributes = new SeparatedSyntaxList<AttributeSyntax>().Add(attribute);
var targetSpecifier = SyntaxFactory.AttributeTargetSpecifier(SyntaxFactory.Token(SyntaxKind.AssemblyKeyword));
var attributeList = SyntaxFactory.AttributeList(targetSpecifier, attributes);
var endOfLineTrivia = SyntaxFactory.ElasticCarriageReturnLineFeed;
var triviaList = SyntaxFactory.TriviaList();
if (needsLeadingEndOfLine)
{
triviaList = triviaList.Add(endOfLineTrivia);
}
return attributeList.WithLeadingTrivia(leadingTrivia.AddRange(triviaList));
}
private void DoTestAddInsertRemoveReplaceOnEmptyList(SyntaxTriviaList list)
{
Assert.Equal(0, list.Count);
var triviaD = SyntaxFactory.ParseLeadingTrivia("/*D*/")[0];
var triviaE = SyntaxFactory.ParseLeadingTrivia("/*E*/")[0];
var newList = list.Add(triviaD);
Assert.Equal(1, newList.Count);
Assert.Equal("/*D*/", newList.ToFullString());
newList = list.AddRange(new[] { triviaD, triviaE });
Assert.Equal(2, newList.Count);
Assert.Equal("/*D*//*E*/", newList.ToFullString());
newList = list.Insert(0, triviaD);
Assert.Equal(1, newList.Count);
Assert.Equal("/*D*/", newList.ToFullString());
newList = list.InsertRange(0, new[] { triviaD, triviaE });
Assert.Equal(2, newList.Count);
Assert.Equal("/*D*//*E*/", newList.ToFullString());
newList = list.Remove(triviaD);
Assert.Equal(0, newList.Count);
Assert.Equal(-1, list.IndexOf(triviaD));
Assert.Throws<ArgumentOutOfRangeException>(() => list.RemoveAt(0));
Assert.Throws<ArgumentOutOfRangeException>(() => list.Insert(1, triviaD));
Assert.Throws<ArgumentOutOfRangeException>(() => list.Insert(-1, triviaD));
Assert.Throws<ArgumentOutOfRangeException>(() => list.InsertRange(1, new[] { triviaD }));
Assert.Throws<ArgumentOutOfRangeException>(() => list.InsertRange(-1, new[] { triviaD }));
Assert.Throws<ArgumentException>(() => list.Replace(triviaD, triviaE));
Assert.Throws<ArgumentException>(() => list.ReplaceRange(triviaD, new[] { triviaE }));
Assert.Throws<ArgumentException>(() => list.Add(default(SyntaxTrivia)));
Assert.Throws<ArgumentException>(() => list.Insert(0, default(SyntaxTrivia)));
Assert.Throws<ArgumentNullException>(() => list.AddRange((IEnumerable<SyntaxTrivia>)null));
Assert.Throws<ArgumentNullException>(() => list.InsertRange(0, (IEnumerable<SyntaxTrivia>)null));
}