public override bool Unindent()
{
if (_startPoint.LineNumber == _endPoint.LineNumber)
{
return(_startPoint.RemovePreviousIndent());
}
using (ITextEdit edit = TextBuffer.AdvancedTextBuffer.CreateEdit())
{
ITextSnapshot snapshot = TextBuffer.AdvancedTextBuffer.CurrentSnapshot;
for (int i = _startPoint.LineNumber; i <= _endPoint.LineNumber; i++)
{
ITextSnapshotLine line = snapshot.GetLineFromLineNumber(i);
if ((line.Length > 0) && (_endPoint.CurrentPosition != line.Start))
{
if (snapshot[line.Start] == '\t')
{
if (!edit.Delete(new Span(line.Start, 1)))
{
return(false);
}
}
else
{
int spacesToRemove = 0;
for (; (line.Start + spacesToRemove < snapshot.Length) && (spacesToRemove < _editorOptions.GetTabSize());
spacesToRemove++)
{
if (snapshot[line.Start + spacesToRemove] != ' ')
{
break;
}
}
if (spacesToRemove > 0)
{
if (!edit.Delete(new Span(line.Start, spacesToRemove)))
{
return(false);
}
}
}
}
}
edit.Apply();
if (edit.Canceled)
{
return(false);
}
}
return(true);
}
public override bool RemovePreviousIndent()
{
return(_bufferPoint.RemovePreviousIndent());
}