This function converts a unit object into absolute units.
Absolute units are unaffected, but non-absolute units are
converted into "null" units.
Usage
absolute.size(unit)
Arguments
unit
An object of class "unit".
Value
An object of class "unit".
Details
Absolute units are things like "inches", "cm",
and "lines". Non-absolute units are "npc"
and "native". This function is designed to be used in widthDetails
and heightDetails methods.