public void AdjustScrollBars()
{
_adjustScrollBarsOnNextUpdate = false;
VScrollBar.Minimum = 0;
// number of visible lines in document (folding!)
VScrollBar.Maximum = TextArea.MaxVScrollValue;
int max = 0;
int firstLine = TextArea.FirstVisibleLine;
int lastLine = Document.GetFirstLogicalLine(TextArea.FirstPhysicalLine + TextArea.VisibleLineCount);
if (lastLine >= Document.TotalNumberOfLines)
{
lastLine = Document.TotalNumberOfLines - 1;
}
if (_lineLengthCache == null || _lineLengthCache.Length <= lastLine)
{
_lineLengthCache = new int[lastLine + LL_CACHE_ADD_SIZE];
}
for (int lineNumber = firstLine; lineNumber <= lastLine; lineNumber++)
{
LineSegment lineSegment = Document.GetLineSegment(lineNumber);
if (Document.FoldingManager.IsLineVisible(lineNumber))
{
if (_lineLengthCache[lineNumber] > 0)
{
max = Math.Max(max, _lineLengthCache[lineNumber]);
}
else
{
int visualLength = TextArea.GetVisualColumnFast(lineSegment, lineSegment.Length);
_lineLengthCache[lineNumber] = Math.Max(1, visualLength);
max = Math.Max(max, visualLength);
}
}
}
HScrollBar.Minimum = 0;
HScrollBar.Maximum = (Math.Max(max + 20, TextArea.VisibleColumnCount - 1));
VScrollBar.LargeChange = Math.Max(0, TextArea.DrawingPosition.Height);
VScrollBar.SmallChange = Math.Max(0, TextArea._FontHeight);
HScrollBar.LargeChange = Math.Max(0, TextArea.VisibleColumnCount - 1);
HScrollBar.SmallChange = Math.Max(0, TextArea.SpaceWidth);
}
