private TypeDeclarationSyntax TransformMethod(MethodTransformationResult methodTransform, TypeDeclarationSyntax newTypeNode, TypeTransformationResult transformResult,
INamespaceTransformationMetadata namespaceMetadata, SyntaxTrivia memberWhitespace, bool onlyMissingMembers)
{
if (methodTransform.AnalyzationResult.Conversion == MethodConversion.Ignore || (onlyMissingMembers && !methodTransform.AnalyzationResult.Missing))
{
// We need to add a whitespace trivia to keep directives as they will not have any leading whitespace
newTypeNode = newTypeNode.RemoveNodeKeepDirectives(methodTransform.Annotation, memberWhitespace, transformResult.EndOfLineTrivia);
return(newTypeNode);
}
var methodNode = newTypeNode.GetAnnotatedNodes(methodTransform.Annotation)
.OfType <MethodDeclarationSyntax>()
.First();
var transformedNode = TransformMethod(methodNode, !onlyMissingMembers, methodTransform, transformResult, namespaceMetadata);
if (transformedNode.Transformed != null)
{
foreach (var transformer in _configuration.MethodTransformers)
{
var methodTransformResult = transformer.Transform(transformedNode, transformResult, namespaceMetadata);
if (methodTransformResult == MethodTransformerResult.Skip)
{
continue;
}
transformedNode.Transformed = methodTransformResult.TransformedNode ?? transformedNode.Transformed;
if (methodTransformResult.Fields != null)
{
if (transformedNode.Fields == null)
{
transformedNode.Fields = new List <FieldDeclarationSyntax>(1);
}
transformedNode.Fields.AddRange(methodTransformResult.Fields);
// Update member names for next transformators
foreach (var variable in methodTransformResult.Fields.SelectMany(o => o.Declaration.Variables))
{
transformResult.MemberNames = transformResult.MemberNames.Add(variable.Identifier.Text);
}
}
if (methodTransformResult.Methods != null)
{
transformedNode.AddMethods(methodTransformResult.Methods);
// Update member names for next transformators
foreach (var method in methodTransformResult.Methods)
{
transformResult.MemberNames = transformResult.MemberNames.Add(method.Identifier.Text);
}
}
}
}
newTypeNode = newTypeNode.ReplaceWithMembers(methodNode, methodTransform.Transformed, methodTransform.Fields, methodTransform.Methods);
return(newTypeNode);
}
private MethodTransformationResult TransformMethod(MethodDeclarationSyntax methodNode, bool canCopy, MethodTransformationResult result, ITypeTransformationMetadata typeMetadata,
INamespaceTransformationMetadata namespaceMetadata)
{
//var result = new MethodTransformationResult(methodResult);
var methodResult = result.AnalyzationResult;
var methodConversion = methodResult.Conversion;
if (!canCopy)
{
methodConversion &= ~MethodConversion.Copy;
}
//var methodNode = customNode ?? methodResult.Node;
var methodBodyNode = methodResult.GetBodyNode();
// Calculate whitespace method trivias
result.EndOfLineTrivia = methodNode.GetEndOfLine();
result.LeadingWhitespaceTrivia = methodNode.GetLeadingWhitespace();
result.IndentTrivia = methodNode.GetIndent(result.LeadingWhitespaceTrivia, typeMetadata.LeadingWhitespaceTrivia);
result.BodyLeadingWhitespaceTrivia = Whitespace(result.LeadingWhitespaceTrivia.ToFullString() + result.IndentTrivia.ToFullString());
if (methodConversion == MethodConversion.Ignore)
{
return(result);
}
if (methodBodyNode == null)
{
if (methodConversion.HasFlag(MethodConversion.ToAsync))
{
result.Transformed = methodNode;
if (methodConversion.HasFlag(MethodConversion.Copy))
{
result.AddMethod(methodResult.Node);
}
return(result);
}
if (methodConversion.HasFlag(MethodConversion.Copy))
{
result.Transformed = methodResult.Node;
}
return(result);
}
var startMethodSpan = methodResult.Node.Span.Start;
methodNode = methodNode.WithAdditionalAnnotations(new SyntaxAnnotation(result.Annotation));
startMethodSpan -= methodNode.SpanStart;
// First we need to annotate nodes that will be modified in order to find them later on.
// We cannot rely on spans after the first modification as they will change
var typeReferencesAnnotations = new List <string>();
foreach (var typeReference in methodResult.TypeReferences.Where(o => o.TypeAnalyzationResult.Conversion == TypeConversion.NewType))
{
var reference = typeReference.ReferenceLocation;
var startSpan = reference.Location.SourceSpan.Start - startMethodSpan;
var nameNode = methodNode.GetSimpleName(startSpan, reference.Location.SourceSpan.Length);
var annotation = Guid.NewGuid().ToString();
methodNode = methodNode.ReplaceNode(nameNode, nameNode.WithAdditionalAnnotations(new SyntaxAnnotation(annotation)));
typeReferencesAnnotations.Add(annotation);
}
// For copied methods we need just to replace type references
if (methodConversion.HasFlag(MethodConversion.Copy))
{
var copiedMethod = methodNode;
// Modify references
foreach (var refAnnotation in typeReferencesAnnotations)
{
var nameNode = copiedMethod.GetAnnotatedNodes(refAnnotation).OfType <SimpleNameSyntax>().First();
copiedMethod = copiedMethod
.ReplaceNode(nameNode, nameNode.WithIdentifier(Identifier(nameNode.Identifier.Value + "Async").WithTriviaFrom(nameNode.Identifier)));
}
if (!methodConversion.HasFlag(MethodConversion.ToAsync))
{
result.Transformed = copiedMethod;
return(result);
}
result.AddMethod(copiedMethod.WithoutAnnotations(result.Annotation));
}
foreach (var childFunction in methodResult.ChildFunctions.Where(o => o.Conversion != MethodConversion.Ignore))
{
var functionNode = childFunction.GetNode();
var functionKind = functionNode.Kind();
var typeSpanStart = functionNode.SpanStart - startMethodSpan;
var typeSpanLength = functionNode.Span.Length;
var funcNode = methodNode.DescendantNodesAndSelf()
.First(o => o.IsKind(functionKind) && o.SpanStart == typeSpanStart && o.Span.Length == typeSpanLength);
var transformFuncResult = TransformFunction(childFunction, result, typeMetadata, namespaceMetadata);
result.TransformedFunctions.Add(transformFuncResult);
methodNode = methodNode.ReplaceNode(funcNode, funcNode.WithAdditionalAnnotations(new SyntaxAnnotation(transformFuncResult.Annotation)));
}
foreach (var referenceResult in methodResult.FunctionReferences
.Where(o => o.GetConversion() == ReferenceConversion.ToAsync))
{
var transfromReference = new FunctionReferenceTransformationResult(referenceResult);
var isCref = referenceResult.IsCref;
var reference = referenceResult.ReferenceLocation;
var startSpan = reference.Location.SourceSpan.Start - startMethodSpan;
var nameNode = methodNode.GetSimpleName(startSpan, reference.Location.SourceSpan.Length, isCref);
methodNode = methodNode.ReplaceNode(nameNode, nameNode.WithAdditionalAnnotations(new SyntaxAnnotation(transfromReference.Annotation)));
result.TransformedFunctionReferences.Add(transfromReference);
if (isCref || referenceResult.IsNameOf || !methodResult.OmitAsync)
{
continue;
}
// We need to annotate the reference node (InvocationExpression, IdentifierName) in order to know if we need to wrap the node in a Task.FromResult
var refNode = referenceResult.ReferenceNode;
var bodyReference = (IBodyFunctionReferenceAnalyzationResult)referenceResult;
if (bodyReference.UseAsReturnValue || refNode.IsReturned())
{
startSpan = refNode.SpanStart - startMethodSpan;
var referenceNode = methodNode.DescendantNodes().First(o => o.SpanStart == startSpan && o.Span.Length == refNode.Span.Length);
methodNode = methodNode.ReplaceNode(referenceNode, referenceNode.WithAdditionalAnnotations(new SyntaxAnnotation(Annotations.TaskReturned)));
}
}
// Before modifying, fixup method body formatting in order to prevent weird formatting when adding additinal code
methodNode = FixupBodyFormatting(methodNode, result);
// Modify references
foreach (var refAnnotation in typeReferencesAnnotations)
{
var nameNode = methodNode.GetAnnotatedNodes(refAnnotation).OfType <SimpleNameSyntax>().First();
methodNode = methodNode
.ReplaceNode(nameNode, nameNode.WithIdentifier(Identifier(nameNode.Identifier.Value + "Async").WithTriviaFrom(nameNode.Identifier)));
}
foreach (var transformFunction in result.TransformedFunctions)
{
var funcNode = methodNode.GetAnnotatedNodes(transformFunction.Annotation).First();
methodNode = methodNode
.ReplaceNode(funcNode, transformFunction.Transformed);
}
// We have to order by OriginalStartSpan in order to have consistent formatting when adding awaits
foreach (var transfromReference in result.TransformedFunctionReferences.OrderByDescending(o => o.OriginalStartSpan))
{
methodNode = TransformFunctionReference(methodNode, methodResult, transfromReference, typeMetadata, namespaceMetadata);
}
result.Transformed = methodNode;
return(result);
}
private RootTypeTransformationResult TransformType(ITypeAnalyzationResult rootTypeResult, INamespaceTransformationMetadata namespaceMetadata, bool onlyMissingMembers)
{
var rootTypeNode = rootTypeResult.Node;
var startRootTypeSpan = rootTypeNode.SpanStart;
var rootTransformResult = new RootTypeTransformationResult(rootTypeResult)
{
MemberNames = rootTypeResult.Symbol.MemberNames.ToImmutableHashSet()
};
// We do this here because we want that the root node has span start equal to 0
rootTypeNode = rootTypeNode.WithAdditionalAnnotations(new SyntaxAnnotation(rootTransformResult.Annotation));
startRootTypeSpan -= rootTypeNode.SpanStart;
// Before any modification we need to annotate nodes that will be transformed in order to find them later on.
// We cannot rely on spans as they changes each time the node is modified.
// We need to annotate also the ignored types to be later removed
foreach (var typeResult in rootTypeResult.GetSelfAndDescendantsTypes())
{
var typeSpanStart = typeResult.Node.SpanStart - startRootTypeSpan;
var typeSpanLength = typeResult.Node.Span.Length;
var typeNode = rootTypeNode.DescendantNodesAndSelf().OfType <TypeDeclarationSyntax>()
.First(o => o.SpanStart == typeSpanStart && o.Span.Length == typeSpanLength);
var leadingWhitespace = typeNode.GetLeadingWhitespace();
TypeTransformationResult transformResult;
if (typeNode == rootTypeNode)
{
transformResult = rootTransformResult;
transformResult.IndentTrivia = typeNode.GetIndent(leadingWhitespace, namespaceMetadata.LeadingWhitespaceTrivia);
}
else
{
transformResult = new TypeTransformationResult(typeResult)
{
MemberNames = typeResult.Symbol.MemberNames.ToImmutableHashSet(),
IndentTrivia = typeNode.GetIndent(leadingWhitespace)
};
rootTypeNode = rootTypeNode.ReplaceNode(typeNode, typeNode.WithAdditionalAnnotations(new SyntaxAnnotation(transformResult.Annotation)));
rootTransformResult.DescendantTransformedTypes.Add(transformResult);
}
transformResult.LeadingWhitespaceTrivia = leadingWhitespace;
transformResult.EndOfLineTrivia = typeNode.GetEndOfLine();
if (typeResult.Conversion == TypeConversion.Ignore)
{
continue; // The ignored type shall be only annotated
}
// TypeReferences can be changes only if we create a new type
if (typeResult.Conversion == TypeConversion.NewType || typeResult.Conversion == TypeConversion.Copy)
{
foreach (var typeReference in typeResult.TypeReferences.Where(o => o.TypeAnalyzationResult.Conversion == TypeConversion.NewType))
{
var reference = typeReference.ReferenceLocation;
var refSpanStart = reference.Location.SourceSpan.Start - startRootTypeSpan;
var refSpanLength = reference.Location.SourceSpan.Length;
var nameNode = rootTypeNode.GetSimpleName(refSpanStart, refSpanLength, typeReference.IsCref);
var transformedNode = new TransformationResult(nameNode)
{
Transformed = nameNode.WithIdentifier(Identifier(nameNode.Identifier.ValueText + "Async").WithTriviaFrom(nameNode.Identifier))
};
transformResult.TransformedNodes.Add(transformedNode);
rootTypeNode = rootTypeNode.ReplaceNode(nameNode, nameNode.WithAdditionalAnnotations(new SyntaxAnnotation(transformedNode.Annotation)));
}
}
foreach (var fieldResult in typeResult.Fields)
{
var fieldSpanStart = fieldResult.Node.SpanStart - startRootTypeSpan;
var fieldSpanLength = fieldResult.Node.Span.Length;
var fieldNode = rootTypeNode.DescendantNodes()
.OfType <BaseFieldDeclarationSyntax>()
.First(o => o.SpanStart == fieldSpanStart && o.Span.Length == fieldSpanLength);
var transformedNode = new FieldTransformationResult(fieldResult);
transformResult.TransformedFields.Add(transformedNode);
rootTypeNode = rootTypeNode.ReplaceNode(fieldNode, fieldNode.WithAdditionalAnnotations(new SyntaxAnnotation(transformedNode.Annotation)));
}
// Annotate and save an empty method transformation result
foreach (var methodResult in typeResult.Methods /*.Where(o => o.Conversion != MethodConversion.Ignore)*/)
{
var methodSpanStart = methodResult.Node.SpanStart - startRootTypeSpan;
var methodSpanLength = methodResult.Node.Span.Length;
var methodNode = rootTypeNode.DescendantNodes()
.OfType <MethodDeclarationSyntax>()
.First(o => o.SpanStart == methodSpanStart && o.Span.Length == methodSpanLength);
// Only create the transformation result for the method and transform the method later as the method may change
// (a directive may be added to the method when removing type members)
var transformedNode = new MethodTransformationResult(methodResult);
transformResult.TransformedMethods.Add(transformedNode);
rootTypeNode = rootTypeNode.ReplaceNode(methodNode, methodNode.WithAdditionalAnnotations(new SyntaxAnnotation(transformedNode.Annotation)));
// Annotate all locks inside the method before the transformations begins as will be easier to transform them if needed
foreach (var lockData in methodResult.Locks)
{
var lockSpanStart = lockData.Node.SpanStart - startRootTypeSpan;
var lockSpanLength = lockData.Node.Span.Length;
var lockNode = rootTypeNode.DescendantNodes()
.OfType <LockStatementSyntax>()
.First(o => o.SpanStart == lockSpanStart && o.Span.Length == lockSpanLength);
var lockTransformedNode = new LockTransformationResult(lockData);
transformedNode.TransformedLocks.Add(lockTransformedNode);
rootTypeNode = rootTypeNode.ReplaceNode(lockNode,
lockNode.WithAdditionalAnnotations(new SyntaxAnnotation(lockTransformedNode.Annotation)));
}
}
foreach (var methodResult in typeResult.SpecialMethods)
{
var methodSpanStart = methodResult.GetNode().SpanStart - startRootTypeSpan;
var methodSpanLength = methodResult.GetNode().Span.Length;
var methodNode = rootTypeNode.DescendantNodes()
.OfType <BaseMethodDeclarationSyntax>()
.First(o => o.SpanStart == methodSpanStart && o.Span.Length == methodSpanLength);
var transformedNode = new FunctionTransformationResult(methodResult);
transformResult.TransformedSpecialMethods.Add(transformedNode);
rootTypeNode = rootTypeNode.ReplaceNode(methodNode, methodNode.WithAdditionalAnnotations(new SyntaxAnnotation(transformedNode.Annotation)));
}
foreach (var propertyResult in typeResult.Properties)
{
var spanStart = propertyResult.Node.SpanStart - startRootTypeSpan;
var spanLength = propertyResult.Node.Span.Length;
var node = rootTypeNode.DescendantNodes()
.OfType <PropertyDeclarationSyntax>()
.First(o => o.SpanStart == spanStart && o.Span.Length == spanLength);
var transformedNode = new PropertyTransformationResult(propertyResult);
transformResult.TransformedProperties.Add(transformedNode);
rootTypeNode = rootTypeNode.ReplaceNode(node, node.WithAdditionalAnnotations(new SyntaxAnnotation(transformedNode.Annotation)));
}
}
// Save the orignal node that was only annotated
var originalAnnotatedNode = rootTypeNode;
// Now we can start transforming the type. Start from the bottom in order to preserve replaced nested types
foreach (var transformResult in rootTransformResult.GetSelfAndDescendantTransformedTypes().OrderByDescending(o => o.OriginalNode.SpanStart))
{
var typeResult = transformResult.AnalyzationResult;
// Add partial keyword on the original node if not present
if ((typeResult.Conversion == TypeConversion.Partial || onlyMissingMembers) && !typeResult.IsPartial)
{
if (rootTransformResult.OriginalModified == null)
{
rootTransformResult.OriginalModified = originalAnnotatedNode;
}
var typeNode = rootTransformResult.OriginalModified.GetAnnotatedNodes(transformResult.Annotation).OfType <TypeDeclarationSyntax>().First();
rootTransformResult.OriginalModified = rootTransformResult.OriginalModified.ReplaceNode(typeNode, typeNode.AddPartial());
}
if (typeResult.Conversion == TypeConversion.Ignore ||
(
onlyMissingMembers &&
!typeResult.GetSelfAndDescendantsTypes().SelectMany(o => o.MethodsAndAccessors).Any(o => o.Missing)
))
{
rootTypeNode = rootTypeNode.RemoveNodeKeepDirectives(transformResult.Annotation, transformResult.LeadingWhitespaceTrivia,
transformResult.EndOfLineTrivia);
continue;
}
var memberWhitespace = Whitespace(transformResult.LeadingWhitespaceTrivia.ToFullString() + transformResult.IndentTrivia.ToFullString());
if (typeResult.Conversion == TypeConversion.Partial || onlyMissingMembers)
{
// First we need to remove ignored method
var typeNode = rootTypeNode.GetAnnotatedNodes(transformResult.Annotation).OfType <TypeDeclarationSyntax>().First();
// We need to remove the attributes as they cannot be defined in both partial classes
var newTypeNode = typeNode.AddPartial().WithoutAttributes();
// We need to remove all other members that are not methods, properties or types
newTypeNode = newTypeNode.RemoveMembersKeepDirectives(o =>
!(o is BaseMethodDeclarationSyntax ||
o is TypeDeclarationSyntax ||
o is PropertyDeclarationSyntax ||
o is BaseFieldDeclarationSyntax), memberWhitespace,
transformResult.EndOfLineTrivia);
rootTypeNode = TransformTypeMembers(namespaceMetadata, onlyMissingMembers, transformResult, newTypeNode,
memberWhitespace, rootTypeNode, typeNode);
}
// If the root type has to be a new type then all nested types have to be new types
else if (typeResult.Conversion == TypeConversion.NewType || typeResult.Conversion == TypeConversion.Copy)
{
var typeNode = rootTypeNode.GetAnnotatedNodes(transformResult.Annotation).OfType <TypeDeclarationSyntax>().First();
var identifierToken = typeNode.ChildTokens().First(o => o.IsKind(SyntaxKind.IdentifierToken));
var newTypeNode = typeResult.Conversion == TypeConversion.NewType
? typeNode.ReplaceToken(identifierToken, Identifier(identifierToken.ValueText + "Async").WithTriviaFrom(identifierToken))
: typeNode;
rootTypeNode = TransformTypeMembers(namespaceMetadata, onlyMissingMembers, transformResult, newTypeNode,
memberWhitespace, rootTypeNode, typeNode);
}
}
rootTransformResult.Transformed = rootTypeNode;
return(rootTransformResult);
}