The snapped CSS center a stroke of deviceWidth device px sits at for a boundary at
boundaryCss, accounting for crisp parity (snapLineCenter) and edge-aware
outward growth (edgeTrailingShift).
This is the single placement rule shared by gridlines, cell borders, and range
overlays - anything that calls it lands on the same device pixels and lines up.
The snapped CSS center a stroke of
deviceWidthdevice px sits at for a boundary atboundaryCss, accounting for crisp parity (snapLineCenter) and edge-aware outward growth (edgeTrailingShift).This is the single placement rule shared by gridlines, cell borders, and range overlays - anything that calls it lands on the same device pixels and lines up.