/// <summary>
/// Calculate tab offsets by going up
/// </summary>
private void CalculateTabOffsetUp(ITextSnapshotLine curLine, int colNumber, ColumnSizeInfo colTabOffset)
{
int curLineNumber = curLine.LineNumber - 1;
ITextSnapshot textSnapshot = _textView.TextSnapshot;
ElasticTabstopsLine elasticLine = _elasticTabstopsLinesCache[curLine.LineNumber];
bool isLastColumnInLine = elasticLine.IsLastColumnInLine(colNumber);
while (curLineNumber >= 0)
{
ITextSnapshotLine upLine = textSnapshot.GetLineFromLineNumber(curLineNumber);
ElasticTabstopsLine upElasticLine = GetElasticTabstopsLine(upLine);
if (upElasticLine.IsLastColumnInLine(colNumber) != isLastColumnInLine)
{
break;
}
ElasticTabstopsColumn upColumn = upElasticLine.GetColumnOrDefault(colNumber);
if (upColumn == null)
{
break;
}
upColumn.TabOffset = colTabOffset;
ShrinkTabOffset(upElasticLine, colNumber);
curLineNumber--;
}
}
/// <summary>
/// Calculate tab offsets by going down
/// </summary>
private void CalculateTabOffsetDown(ITextSnapshotLine curLine, int colNumber, ColumnSizeInfo colTabOffset)
{
int curLineNumber = curLine.LineNumber + 1;
ITextSnapshot textSnapshot = _textView.TextSnapshot;
ElasticTabstopsLine elasticLine = _elasticTabstopsLinesCache[curLine.LineNumber];
bool isLastColumnInLine = elasticLine.IsLastColumnInLine(colNumber);
while (curLineNumber < textSnapshot.LineCount)
{
ITextSnapshotLine downLine = textSnapshot.GetLineFromLineNumber(curLineNumber);
ElasticTabstopsLine downElasticLine = GetElasticTabstopsLine(downLine);
if (downElasticLine.IsLastColumnInLine(colNumber) != isLastColumnInLine)
{
break;
}
ElasticTabstopsColumn downColumn = downElasticLine.GetColumnOrDefault(colNumber);
if (downColumn == null)
{
break;
}
downColumn.TabOffset = colTabOffset;
ShrinkTabOffset(downElasticLine, colNumber);
curLineNumber++;
}
}