private static async Task <AnalysisResult?> AnalyzeAsync(Document document, string newDocumentName, CancellationToken cancellationToken)
{
// TODO: Detect naming conflicts ahead of time
var documentWithNewName = document.WithName(newDocumentName);
var originalSymbolName = WorkspacePathUtilities.GetTypeNameFromDocumentName(document);
var newTypeName = WorkspacePathUtilities.GetTypeNameFromDocumentName(documentWithNewName);
if (originalSymbolName is null || newTypeName is null)
{
return(null);
}
var matchingDeclaration = await GetMatchingTypeDeclarationAsync(document, originalSymbolName, cancellationToken).ConfigureAwait(false);
if (matchingDeclaration is null)
{
return(null);
}
var semanticModel = await document.GetRequiredSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var symbol = semanticModel.GetDeclaredSymbol(matchingDeclaration, cancellationToken);
if (symbol is null || WorkspacePathUtilities.TypeNameMatchesDocumentName(documentWithNewName, symbol.Name))
{
return(null);
}
return(new AnalysisResult(
document,
newDocumentName,
newTypeName,
symbol.Name));
}
private static async Task <SyntaxNode?> GetMatchingTypeDeclarationAsync(Document document, string name, CancellationToken cancellationToken)
{
var syntaxRoot = await document.GetRequiredSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var syntaxFacts = document.GetRequiredLanguageService <ISyntaxFactsService>();
var typeDeclarations = syntaxRoot.DescendantNodesAndSelf(n => !syntaxFacts.IsMethodBody(n)).Where(syntaxFacts.IsTypeDeclaration);
return(typeDeclarations.FirstOrDefault(d => WorkspacePathUtilities.TypeNameMatchesDocumentName(document, d, syntaxFacts)));
}
private static AnalysisResult?Analyze(Document document, IReadOnlyCollection <string> newFolders)
{
// https://github.com/dotnet/roslyn/issues/41841
// VB implementation is incomplete for sync namespace
if (document.Project.Language == LanguageNames.CSharp)
{
var syntaxFacts = document.GetRequiredLanguageService <ISyntaxFactsService>();
var targetNamespace = WorkspacePathUtilities.TryBuildNamespaceFromFolders(newFolders, syntaxFacts);
if (targetNamespace is null)
{
return(null);
}
return(new AnalysisResult(targetNamespace));
}
else
{
return(null);
}
}
public InlineRenameFileRenameInfo GetFileRenameInfo()
{
if (RenameSymbol.Kind == SymbolKind.NamedType &&
_document.Project.Solution.Workspace.CanApplyChange(ApplyChangesKind.ChangeDocumentInfo))
{
if (RenameSymbol.Locations.Length > 1)
{
return(InlineRenameFileRenameInfo.TypeWithMultipleLocations);
}
// Get the document that the symbol is defined in to compare
// the name with the symbol name. If they match allow
// rename file rename as part of the symbol rename
var symbolSourceDocument = _document.Project.Solution.GetDocument(RenameSymbol.Locations.Single().SourceTree);
if (symbolSourceDocument != null && WorkspacePathUtilities.TypeNameMatchesDocumentName(symbolSourceDocument, RenameSymbol.Name))
{
return(InlineRenameFileRenameInfo.Allowed);
}
return(InlineRenameFileRenameInfo.TypeDoesNotMatchFileName);
}
return(InlineRenameFileRenameInfo.NotAllowed);
}
public static async Task <State> CreateAsync(
AbstractSyncNamespaceCodeRefactoringProvider <TNamespaceDeclarationSyntax, TCompilationUnitSyntax, TMemberDeclarationSyntax> provider,
Document document,
TextSpan textSpan,
CancellationToken cancellationToken)
{
// User must put cursor on one of the nodes described below to trigger the refactoring.
// For each scenario, all requirements must be met. Some of them are checked by `TryGetApplicableInvocationNodeAsync`,
// rest by `IChangeNamespaceService.CanChangeNamespaceAsync`.
//
// - A namespace declaration node that is the only namespace declaration in the document and all types are declared in it:
// 1. No nested namespace declarations (even it's empty).
// 2. The cursor is on the name of the namespace declaration.
// 3. The name of the namespace is valid (i.e. no errors).
// 4. No partial type declared in the namespace. Otherwise its multiple declaration will
// end up in different namespace.
//
// - A compilation unit node that contains no namespace declaration:
// 1. The cursor is on the name of first declared type.
// 2. No partial type declared in the document. Otherwise its multiple declaration will
// end up in different namespace.
var applicableNode = await provider.TryGetApplicableInvocationNodeAsync(document, textSpan, cancellationToken).ConfigureAwait(false);
if (applicableNode == null)
{
return(null);
}
var changeNamespaceService = document.GetLanguageService <IChangeNamespaceService>();
var canChange = await changeNamespaceService.CanChangeNamespaceAsync(document, applicableNode, cancellationToken).ConfigureAwait(false);
if (!canChange || !IsDocumentPathRootedInProjectFolder(document))
{
return(null);
}
var syntaxFacts = document.GetLanguageService <ISyntaxFactsService>();
// We can't determine what the expected namespace would be without knowing the default namespace.
var defaultNamespace = GetDefaultNamespace(document, syntaxFacts);
if (defaultNamespace == null)
{
return(null);
}
string declaredNamespace;
if (applicableNode is TCompilationUnitSyntax)
{
declaredNamespace = string.Empty;
}
else if (applicableNode is TNamespaceDeclarationSyntax)
{
var syntaxGenerator = SyntaxGenerator.GetGenerator(document);
declaredNamespace = syntaxGenerator.GetName(applicableNode);
}
else
{
throw ExceptionUtilities.Unreachable;
}
// Namespace can't be changed if we can't construct a valid qualified identifier from folder names.
// In this case, we might still be able to provide refactoring to move file to new location.
var namespaceFromFolders = WorkspacePathUtilities.TryBuildNamespaceFromFolders(document.Folders, syntaxFacts);
var targetNamespace = namespaceFromFolders == null
? null
: ConcatNamespace(defaultNamespace, namespaceFromFolders);
// No action required if namespace already matches folders.
if (syntaxFacts.StringComparer.Equals(targetNamespace, declaredNamespace))
{
return(null);
}
// Only provide "move file" action if default namespace contains declared namespace.
// For example, if the default namespace is `Microsoft.CodeAnalysis`, and declared
// namespace is `System.Diagnostics`, it's very likely this document is an outlier
// in the project and user probably has some special rule for it.
var relativeNamespace = GetRelativeNamespace(defaultNamespace, declaredNamespace, syntaxFacts);
return(new State(document, applicableNode, targetNamespace, relativeNamespace));
}
