Bertrand Delacretaz wrote:
Doesn't kerning cause the same problem as smart font features (like
automatic ligatures)? It also causes the total width of a group of
character to change when the group is split between two lines.
AFAICT kerning rarely applies to character pairs which may be subject
to line breaks, at least for western alphabets. So I wouldn't worry
all that much, except for proper adjustments in case of hyphenation.
Arabic, thai and various indian scripts are another matter, but then
there are a lot of more basic features for handling these scripts
properly missing anyway.