private TextRange FindMatch(string pattern, FindOptions findOptions, TextPoint endPoint)
{
if (pattern.Length == 0)
{
return(_bufferPrimitivesFactory.CreateTextRange(_textBuffer, this.Clone(), this.Clone()));
}
FindData findData = new FindData(pattern, _textBuffer.AdvancedTextBuffer.CurrentSnapshot);
findData.FindOptions = findOptions;
bool wrapAround = endPoint == null;
bool searchReverse = ((findData.FindOptions & FindOptions.SearchReverse) == FindOptions.SearchReverse);
// In the case of a wrap-around search, we can start the search at this point always. In the case
// where we are searching a range in reverse, we have to start at the end point.
int searchStartPosition = (searchReverse && !wrapAround) ? endPoint.CurrentPosition : CurrentPosition;
SnapshotSpan?snapshotSpan = _findLogic.FindNext(searchStartPosition, wrapAround, findData);
if (snapshotSpan.HasValue)
{
if ((endPoint == null) || (snapshotSpan.Value.End <= endPoint.CurrentPosition))
{
return(_bufferPrimitivesFactory.CreateTextRange(_textBuffer,
_bufferPrimitivesFactory.CreateTextPoint(_textBuffer, snapshotSpan.Value.Start),
_bufferPrimitivesFactory.CreateTextPoint(_textBuffer, snapshotSpan.Value.End)));
}
}
return(_bufferPrimitivesFactory.CreateTextRange(_textBuffer, this.Clone(), this.Clone()));
}
public override TextPoint GetTextPoint(int position)
{
if ((position < 0) || (position > _textBuffer.CurrentSnapshot.Length))
{
throw new ArgumentOutOfRangeException("position");
}
return(_bufferPrimitivesFactory.CreateTextPoint(this, position));
}
