private async Task <ImmutableArray <TextChange> > GetTextChangesAsync(
Document document, SyntaxNode contextNode,
bool placeSystemNamespaceFirst, bool allowInHiddenRegions, bool hasExistingImport,
CancellationToken cancellationToken)
{
// Defer to the language to add the actual import/using.
if (hasExistingImport)
{
return(ImmutableArray <TextChange> .Empty);
}
(var newContextNode, var newDocument) = await ReplaceNameNodeAsync(
contextNode, document, cancellationToken).ConfigureAwait(false);
var updatedDocument = await provider.AddImportAsync(
newContextNode, SymbolResult.Symbol, newDocument,
placeSystemNamespaceFirst, allowInHiddenRegions, cancellationToken).ConfigureAwait(false);
var cleanedDocument = await CodeAction.CleanupDocumentAsync(
updatedDocument, cancellationToken).ConfigureAwait(false);
var textChanges = await cleanedDocument.GetTextChangesAsync(
document, cancellationToken).ConfigureAwait(false);
return(textChanges.ToImmutableArray());
}
protected async Task <ImmutableArray <TextChange> > GetTextChangesAsync(
Document document,
SyntaxNode node,
bool placeSystemNamespaceFirst,
bool allowInHiddenRegions,
CancellationToken cancellationToken
)
{
var originalDocument = document;
(node, document) = await ReplaceNameNodeAsync(node, document, cancellationToken)
.ConfigureAwait(false);
var newDocument = await provider
.AddImportAsync(
node,
SearchResult.NameParts,
document,
placeSystemNamespaceFirst,
allowInHiddenRegions,
cancellationToken
)
.ConfigureAwait(false);
var cleanedDocument = await CodeAction
.CleanupDocumentAsync(newDocument, cancellationToken)
.ConfigureAwait(false);
var textChanges = await cleanedDocument
.GetTextChangesAsync(originalDocument, cancellationToken)
.ConfigureAwait(false);
return(textChanges.ToImmutableArray());
}
public async Task <Document> FormatNewDocumentAsync(Document document, Document?hintDocument, CancellationToken cancellationToken)
{
foreach (var provider in GetProviders())
{
cancellationToken.ThrowIfCancellationRequested();
// If a single formatter has a bug, we still want to keep trying the others.
// Since they are unordered it would be inappropriate for them to depend on each
// other, so this shouldn't cause problems.
try
{
// First we ask the provider to "format" the document. This could be formatting in terms
// of adjusting block scopes to file scopes etc., but it could also be more akin to fixers
// like adding access modifiers, or adding .ConfigureAwait() calls etc.
document = await provider.FormatNewDocumentAsync(document, hintDocument, cancellationToken).ConfigureAwait(false);
// Now that the above has changed the document, we use the code action engine to clean up the document
// before we call the next provider, otherwise they might not see things as they are meant to be.
// Because formatting providers often re-use code fix logic, they are often written assuming this will
// happen.
document = await CodeAction.CleanupDocumentAsync(document, cancellationToken).ConfigureAwait(false);
}
catch (Exception ex) when(FatalError.ReportAndCatchUnlessCanceled(ex, cancellationToken, ErrorSeverity.General))
{
}
}
return(document);
}
private async Task <Solution> CleanupAsync(Solution oldSolution, Solution newSolution, CancellationToken cancellationToken)
{
var changes = newSolution.GetChangedDocuments(oldSolution);
var final = newSolution;
foreach (var docId in changes)
{
var cleaned = await CodeAction.CleanupDocumentAsync(
newSolution.GetDocument(docId), cancellationToken).ConfigureAwait(false);
var cleanedRoot = await cleaned.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
final = final.WithDocumentSyntaxRoot(docId, cleanedRoot);
}
return(final);
}