public static async Task <Document> RefactorAsync(
Document document,
UsingDirectiveSyntax usingDirective,
CancellationToken cancellationToken = default(CancellationToken))
{
return(await RemoveUsingAliasDirectiveSyntaxRewriter.VisitAsync(document, usingDirective, cancellationToken).ConfigureAwait(false));
}
public static async Task <Document> VisitAsync(
Document document,
UsingDirectiveSyntax usingDirective,
CancellationToken cancellationToken = default(CancellationToken))
{
if (document == null)
{
throw new ArgumentNullException(nameof(document));
}
if (usingDirective == null)
{
throw new ArgumentNullException(nameof(usingDirective));
}
SyntaxNode root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
SyntaxTree tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
SemanticModel semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
var aliasSymbol = semanticModel.GetDeclaredSymbol(usingDirective, cancellationToken) as IAliasSymbol;
var identifierNames = new List <IdentifierNameSyntax>();
IEnumerable <ReferencedSymbol> referencedSymbols = await SymbolFinder.FindReferencesAsync(aliasSymbol, document.Project.Solution, cancellationToken).ConfigureAwait(false);
foreach (TextSpan span in GetSymbolSpans(referencedSymbols, tree))
{
IdentifierNameSyntax identifierName = root
.FindNode(span, getInnermostNodeForTie: true)
.FirstAncestorOrSelf <IdentifierNameSyntax>();
if (identifierName != null &&
aliasSymbol == semanticModel.GetAliasInfo(identifierName, cancellationToken))
{
identifierNames.Add(identifierName);
}
}
var rewriter = new RemoveUsingAliasDirectiveSyntaxRewriter(usingDirective, identifierNames.ToArray());
SyntaxNode newRoot = rewriter.Visit(root);
usingDirective = (UsingDirectiveSyntax)newRoot.FindNode(usingDirective.Span);
newRoot = newRoot.RemoveNode(usingDirective, SyntaxRemoveOptions.KeepUnbalancedDirectives);
return(document.WithSyntaxRoot(newRoot));
}
