public static async Task ComputeRefactoringsAsync(RefactoringContext context, InitializerExpressionSyntax initializer)
{
if (initializer.IsKind(SyntaxKind.ComplexElementInitializerExpression) &&
initializer.IsParentKind(SyntaxKind.CollectionInitializerExpression))
{
initializer = (InitializerExpressionSyntax)initializer.Parent;
}
if (context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(initializer) ||
context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(initializer.Expressions))
{
SeparatedSyntaxList <ExpressionSyntax> expressions = initializer.Expressions;
if (context.IsRefactoringEnabled(RefactoringIdentifiers.FormatInitializer) &&
expressions.Any() &&
!initializer.IsKind(SyntaxKind.ComplexElementInitializerExpression) &&
initializer.IsParentKind(
SyntaxKind.ArrayCreationExpression,
SyntaxKind.ImplicitArrayCreationExpression,
SyntaxKind.ObjectCreationExpression,
SyntaxKind.CollectionInitializerExpression))
{
if (initializer.IsSingleLine(includeExteriorTrivia: false))
{
context.RegisterRefactoring(
"Format initializer on multiple lines",
cancellationToken => SyntaxFormatter.ToMultiLineAsync(
context.Document,
initializer,
cancellationToken),
RefactoringIdentifiers.FormatInitializer);
}
else if (expressions.All(expression => expression.IsSingleLine()) &&
initializer.DescendantTrivia(initializer.Span).All(f => f.IsWhitespaceOrEndOfLineTrivia()))
{
context.RegisterRefactoring(
"Format initializer on a single line",
cancellationToken => SyntaxFormatter.ToSingleLineAsync(
context.Document,
initializer,
cancellationToken),
RefactoringIdentifiers.FormatInitializer);
}
}
if (context.IsRefactoringEnabled(RefactoringIdentifiers.ExpandInitializer))
{
await ExpandInitializerRefactoring.ComputeRefactoringsAsync(context, initializer).ConfigureAwait(false);
}
if (context.IsRefactoringEnabled(RefactoringIdentifiers.UseCSharp6DictionaryInitializer) &&
context.SupportsCSharp6)
{
await UseCSharp6DictionaryInitializerRefactoring.ComputeRefactoringAsync(context, initializer).ConfigureAwait(false);
}
}
}
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));
}
public static async Task ComputeRefactoringsAsync(RefactoringContext context, InitializerExpressionSyntax initializer)
{
if (initializer.IsKind(SyntaxKind.ComplexElementInitializerExpression) &&
initializer.IsParentKind(SyntaxKind.CollectionInitializerExpression))
{
initializer = (InitializerExpressionSyntax)initializer.Parent;
}
if (context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(initializer) ||
context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(initializer.Expressions))
{
SeparatedSyntaxList <ExpressionSyntax> expressions = initializer.Expressions;
if (context.IsRefactoringEnabled(RefactoringDescriptors.WrapInitializerExpressions) &&
expressions.Any() &&
!initializer.IsKind(SyntaxKind.ComplexElementInitializerExpression) &&
initializer.IsParentKind(
SyntaxKind.ArrayCreationExpression,
SyntaxKind.ImplicitArrayCreationExpression,
SyntaxKind.ObjectCreationExpression,
SyntaxKind.CollectionInitializerExpression,
SyntaxKind.WithExpression))
{
if (initializer.IsSingleLine(includeExteriorTrivia: false))
{
context.RegisterRefactoring(
"Wrap initializer expression",
ct => SyntaxFormatter.ToMultiLineAsync(context.Document, initializer, ct),
RefactoringDescriptors.WrapInitializerExpressions);
}
else if (expressions.All(expression => expression.IsSingleLine()) &&
initializer.DescendantTrivia(initializer.Span).All(f => f.IsWhitespaceOrEndOfLineTrivia()))
{
context.RegisterRefactoring(
"Unwrap initializer expressions",
ct => SyntaxFormatter.ToSingleLineAsync(
context.Document,
initializer.Parent,
TextSpan.FromBounds(initializer.OpenBraceToken.GetPreviousToken().Span.End, initializer.CloseBraceToken.Span.End),
ct),
RefactoringDescriptors.WrapInitializerExpressions);
}
}
if (context.IsRefactoringEnabled(RefactoringDescriptors.AddAllPropertiesToInitializer) &&
initializer.IsKind(SyntaxKind.ObjectInitializerExpression, SyntaxKind.WithInitializerExpression) &&
AddAllPropertiesToInitializerRefactoring.IsApplicableSpan(initializer, context.Span))
{
SemanticModel semanticModdel = await context.GetSemanticModelAsync().ConfigureAwait(false);
AddAllPropertiesToInitializerRefactoring.ComputeRefactorings(context, initializer, semanticModdel);
}
await ExpandInitializerRefactoring.ComputeRefactoringsAsync(context, initializer).ConfigureAwait(false);
if (context.IsRefactoringEnabled(RefactoringDescriptors.UseIndexInitializer) &&
context.SupportsCSharp6)
{
await UseIndexInitializerRefactoring.ComputeRefactoringAsync(context, initializer).ConfigureAwait(false);
}
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
Diagnostic diagnostic = context.Diagnostics[0];
if (!Settings.IsEnabled(diagnostic.Id, CodeFixIdentifiers.MoveInitializerExpressionsToConstructor))
{
return;
}
SyntaxNode root = await context.GetSyntaxRootAsync().ConfigureAwait(false);
ObjectCreationExpressionSyntax objectCreationExpression = root
.FindNode(context.Span, getInnermostNodeForTie: true)?
.FirstAncestorOrSelf <ObjectCreationExpressionSyntax>();
if (objectCreationExpression == null)
{
return;
}
switch (diagnostic.Id)
{
case CompilerDiagnosticIdentifiers.ThereIsNoArgumentGivenThatCorrespondsToRequiredFormalParameter:
{
if (!Settings.IsEnabled(diagnostic.Id, CodeFixIdentifiers.MoveInitializerExpressionsToConstructor))
{
break;
}
if (!objectCreationExpression.Type.Span.Contains(diagnostic.Location.SourceSpan))
{
return;
}
ArgumentListSyntax argumentList = objectCreationExpression.ArgumentList;
if (argumentList?.Arguments.Any() == true)
{
return;
}
InitializerExpressionSyntax initializer = objectCreationExpression.Initializer;
if (initializer == null)
{
return;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
List <ExpressionSyntax> expressions = null;
foreach (ExpressionSyntax expression in initializer.Expressions)
{
if (expression is AssignmentExpressionSyntax assignment &&
semanticModel.GetDiagnostic(
CompilerDiagnosticIdentifiers.PropertyOrIndexerCannotBeUsedInThisContextBecauseSetAccessorIsAccessible,
assignment.Left.Span,
context.CancellationToken) != null)
{
(expressions ??= new List <ExpressionSyntax>()).Add(expression);
}
}
if (expressions == null)
{
return;
}
TypeSyntax type = objectCreationExpression.Type;
if (argumentList == null)
{
argumentList = ArgumentList().WithTrailingTrivia(type.GetTrailingTrivia());
type = type.WithoutTrailingTrivia();
}
SeparatedSyntaxList <ArgumentSyntax> arguments = expressions
.Select(f => Argument(((AssignmentExpressionSyntax)f).Right))
.ToSeparatedSyntaxList();
argumentList = argumentList.WithArguments(arguments);
ObjectCreationExpressionSyntax newObjectCreationExpression = objectCreationExpression.Update(
objectCreationExpression.NewKeyword,
type,
argumentList,
initializer);
SymbolInfo symbolInfo = semanticModel.GetSpeculativeSymbolInfo(
objectCreationExpression.SpanStart,
newObjectCreationExpression,
SpeculativeBindingOption.BindAsExpression);
if (symbolInfo.Symbol is IMethodSymbol methodSymbol &&
methodSymbol.MethodKind == MethodKind.Constructor)
{
CodeAction codeAction = CodeAction.Create(
"Move initializer expressions to constructor",
ct =>
{
InitializerExpressionSyntax newInitializer = initializer.RemoveNodes(expressions, SyntaxRefactorings.DefaultRemoveOptions);
if (newInitializer.Expressions.Count == 0 &&
newInitializer
.DescendantTrivia(TextSpan.FromBounds(newInitializer.OpenBraceToken.SpanStart, newInitializer.CloseBraceToken.SpanStart))
.All(f => f.IsWhitespaceOrEndOfLineTrivia()))
{
newInitializer = null;
ArgumentListSyntax newArgumentList = newObjectCreationExpression
.ArgumentList
.TrimTrailingTrivia()
.AppendToTrailingTrivia(initializer.GetTrailingTrivia());
newObjectCreationExpression = newObjectCreationExpression
.WithArgumentList(newArgumentList);
}
newObjectCreationExpression = newObjectCreationExpression
.WithInitializer(newInitializer)
.WithFormatterAnnotation();
return(context.Document.ReplaceNodeAsync(objectCreationExpression, newObjectCreationExpression, ct));
},
GetEquivalenceKey(diagnostic));
context.RegisterCodeFix(codeAction, diagnostic);
}
break;
}
}
}