private static PhysicalCharInfo BottomToTopLineHitTest(PhysicalLineInfo lineInfo, Point point, bool snapToNearest, TextPointer end)
{
Rect lineBounds;
PhysicalCharInfo result = lineInfo.HitTest(point, snapToNearest, out lineBounds);
if (result == null)
{
if (lineBounds.IsEmpty || point.Y > lineBounds.Bottom)
{
// The point is below the bottom of the current line
// since lines are being scanned from bottom to top
// no other line can contain the point.
// snap to the end of the range
if (snapToNearest)
{
result = new PhysicalCharInfo(end);
}
}
}
return(result);
}
private static PhysicalCharInfo TopToBottomLineHitTest(PhysicalLineInfo lineInfo, Point point, bool snapToNearest, TextPointer start)
{
Rect lineBounds;
PhysicalCharInfo result = lineInfo.HitTest(point, snapToNearest, out lineBounds);
if (result == null)
{
if (lineBounds.IsEmpty || point.Y < lineBounds.Top)
{
// The point is above the top of the current line
// since lines are being scanned from top to bottom
// no other line can contain the point.
// Snap to the beginning of the range
if (snapToNearest)
{
result = new PhysicalCharInfo(start);
}
}
}
return(result);
}