private int?GetDesiredIndentation(ITextSnapshotLine line, CancellationToken cancellationToken)
{
if (line == null)
{
throw new ArgumentNullException(nameof(line));
}
using (Logger.LogBlock(FunctionId.SmartIndentation_Start, cancellationToken))
{
var document = line.Snapshot.GetOpenDocumentInCurrentContextWithChanges();
if (document == null)
{
return(null);
}
var newService = document.GetLanguageService <IIndentationService>();
if (newService == null)
{
return(null);
}
var indentationOptions = _globalOptions.GetIndentationOptionsAsync(document, cancellationToken).WaitAndGetResult_CanCallOnBackground(cancellationToken);
var result = newService.GetIndentation(document, line.LineNumber, indentationOptions, cancellationToken);
return(result.GetIndentation(_textView, line));
}
}
private bool SplitString(ITextView textView, ITextBuffer subjectBuffer, int position, bool useTabs, int tabSize, CancellationToken cancellationToken)
{
var document = subjectBuffer.CurrentSnapshot.GetOpenDocumentInCurrentContextWithChanges();
if (document == null)
{
return(false);
}
// TODO: read option from textView.Options (https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1412138)
var options = _globalOptions.GetIndentationOptionsAsync(document, cancellationToken).WaitAndGetResult(cancellationToken);
using var transaction = CaretPreservingEditTransaction.TryCreate(
CSharpEditorResources.Split_string, textView, _undoHistoryRegistry, _editorOperationsFactoryService);
var splitter = StringSplitter.TryCreate(document, position, options, useTabs, tabSize, cancellationToken);
if (splitter?.TrySplit(out var newDocument, out var newPosition) != true)
{
return(false);
}
// apply the change:
var workspace = newDocument.Project.Solution.Workspace;
workspace.TryApplyChanges(newDocument.Project.Solution);
// move caret:
var snapshotPoint = new SnapshotPoint(
subjectBuffer.CurrentSnapshot, newPosition);
var newCaretPoint = textView.BufferGraph.MapUpToBuffer(
snapshotPoint, PointTrackingMode.Negative, PositionAffinity.Predecessor,
textView.TextBuffer);
if (newCaretPoint != null)
{
textView.Caret.MoveTo(newCaretPoint.Value);
}
transaction.Complete();
return(true);
}
private bool TryStart(CancellationToken cancellationToken)
{
_threadingContext.ThrowIfNotOnUIThread();
var closingSnapshotPoint = ClosingPoint.GetPoint(SubjectBuffer.CurrentSnapshot);
if (closingSnapshotPoint.Position < 1)
{
Debug.Fail("The closing point was not found at the expected position.");
return(false);
}
var openingSnapshotPoint = closingSnapshotPoint.Subtract(1);
if (openingSnapshotPoint.GetChar() != OpeningBrace)
{
// there is a bug in editor brace completion engine on projection buffer that already fixed in vs_pro. until that is FIed to use
// I will make this not to assert
// Debug.Fail("The opening brace was not found at the expected position.");
return(false);
}
OpeningPoint = SubjectBuffer.CurrentSnapshot.CreateTrackingPoint(openingSnapshotPoint, PointTrackingMode.Positive);
var context = GetBraceCompletionContext();
if (context == null)
{
return(false);
}
var braceResult = _service.GetBraceCompletionAsync(context.Value, cancellationToken).WaitAndGetResult(cancellationToken);
if (braceResult == null)
{
return(false);
}
using var caretPreservingTransaction = new CaretPreservingEditTransaction(EditorFeaturesResources.Brace_Completion, _undoHistory, _editorOperations);
// Apply the change to complete the brace.
ApplyBraceCompletionResult(braceResult.Value);
// switch the closing point from positive to negative tracking so that the closing point stays against the closing brace
ClosingPoint = SubjectBuffer.CurrentSnapshot.CreateTrackingPoint(ClosingPoint.GetPoint(SubjectBuffer.CurrentSnapshot), PointTrackingMode.Negative);
var contextAfterStart = GetBraceCompletionContext();
if (contextAfterStart != null)
{
var document = contextAfterStart.Value.Document;
var indentationOptions = _globalOptions.GetIndentationOptionsAsync(document, cancellationToken).WaitAndGetResult(cancellationToken);
var changesAfterStart = _service.GetTextChangesAfterCompletionAsync(contextAfterStart.Value, indentationOptions, cancellationToken).WaitAndGetResult(cancellationToken);
if (changesAfterStart != null)
{
ApplyBraceCompletionResult(changesAfterStart.Value);
}
}
caretPreservingTransaction.Complete();
return(true);
}
