private bool FindMatchingPair(BraceKind brace, SnapshotPoint position, int direction, out SnapshotSpan leftSpan, out SnapshotSpan rightSpan)
{
leftSpan = new SnapshotSpan(position, position);
rightSpan = leftSpan;
var buffer = PythonTextBufferInfo.ForBuffer(_site, position.Snapshot.TextBuffer);
if (buffer == null)
{
return(false);
}
if (!(buffer.GetTokenAtPoint(position)?.Trigger ?? TokenTriggers.None).HasFlag(TokenTriggers.MatchBraces))
{
return(false);
}
var snapshot = position.Snapshot;
int depth = 0;
foreach (var token in (direction > 0 ? buffer.GetTokensForwardFromPoint(position) : buffer.GetTokensInReverseFromPoint(position - 1)))
{
if (!token.Trigger.HasFlag(TokenTriggers.MatchBraces))
{
continue;
}
var tokenSpan = token.ToSnapshotSpan(snapshot);
var txt = tokenSpan.GetText();
var kind = GetBraceKind(txt);
if (kind == BraceKind.None)
{
return(false);
}
if (kind == brace)
{
if (txt.IsCloseGrouping())
{
depth -= direction;
}
else
{
depth += direction;
}
}
if (depth == 0)
{
leftSpan = tokenSpan;
rightSpan = new SnapshotSpan(snapshot, position - 1, 1);
return(true);
}
}
return(false);
}
public int?GetDesiredIndentation(ITextSnapshotLine line)
{
if (_pyService.LangPrefs.IndentMode == vsIndentStyle.vsIndentStyleSmart)
{
return(AutoIndent.GetLineIndentation(PythonTextBufferInfo.ForBuffer(_pyService.Site, line.Snapshot.TextBuffer), line, _textView));
}
else
{
return(null);
}
}
public bool TryCreateContext(ITextView textView, SnapshotPoint openingPoint, char openingBrace, char closingBrace, out IBraceCompletionContext context)
{
var bi = PythonTextBufferInfo.ForBuffer(Site, openingPoint.Snapshot.TextBuffer);
if (IsValidBraceCompletionContext(bi, openingPoint, openingBrace))
{
context = new BraceCompletionContext();
return(true);
}
else
{
context = null;
return(false);
}
}
public PythonTextBufferInfo GetBufferInfo(ITextBuffer textBuffer)
{
return(PythonTextBufferInfo.ForBuffer(this, textBuffer));
}
public bool TryTriggerExpansion(ITextView textView)
{
if (textView == null)
{
throw new ArgumentNullException(nameof(textView));
}
if (_vsExpansionMgr == null)
{
return(false);
}
if (!textView.Selection.IsEmpty || textView.Caret.Position.BufferPosition <= 0)
{
return(false);
}
var snapshot = textView.TextBuffer.CurrentSnapshot;
var caretSpan = new SnapshotSpan(snapshot, new Span(textView.Caret.Position.BufferPosition.Position - 1, 1));
var bufferInfo = PythonTextBufferInfo.ForBuffer(_site, textView.TextBuffer);
var tokens = bufferInfo.GetTrackingTokens(caretSpan);
if (!tokens.Any())
{
return(false);
}
var token = tokens.First();
var tokenSpan = token.ToSnapshotSpan(snapshot);
if (tokenSpan.End.Position != caretSpan.End.Position)
{
// Match C# behavior and only trigger snippet
// if caret is at the end of an identifier. Otherwise,
// a TAB should be inserted even if the token matches
// a snippet shortcut.
return(false);
}
var text = tokenSpan.GetText();
var textSpan = new TextSpan[1];
textSpan[0].iStartLine = tokenSpan.Start.GetContainingLine().LineNumber;
textSpan[0].iStartIndex = tokenSpan.Start.Position - tokenSpan.Start.GetContainingLine().Start;
textSpan[0].iEndLine = tokenSpan.End.GetContainingLine().LineNumber;
textSpan[0].iEndIndex = tokenSpan.End.Position - tokenSpan.End.GetContainingLine().Start;
var client = GetOrCreateExpansionClient(textView);
int hr = _vsExpansionMgr.GetExpansionByShortcut(
client,
CommonGuidList.guidPythonLanguageServiceGuid,
text,
_editorAdaptersFactoryService.GetViewAdapter(textView),
textSpan,
1,
out string expansionPath,
out string title
);
if (ErrorHandler.Succeeded(hr))
{
// hr may be S_FALSE if there are multiple expansions,
// so we don't want to InsertNamedExpansion yet. VS will
// pop up a selection dialog in this case.
if (hr == VSConstants.S_OK)
{
return(ErrorHandler.Succeeded(client.InsertNamedExpansion(title, expansionPath, textSpan[0])));
}
return(true);
}
return(false);
}
