I have code that lays out text along arbitrary paths. I've been
working on making this as compatible with standard text layout as
possible, and it's 99% there.
In my case, I can't let the layout manager directly handle the
underlining because on an arbitrary path, the underline ends up as a
series of disconnected straight lines under each glyph which is very
ugly. So instead, I suppress the underline attribute for the layout
manager and handle it myself by figuring out the underline ranges and
using segments of my actual path, suitably offset, to underline in a
smooth curve. That's working fine and looks much nicer.
When standard text lays out with underlining, the underline is
interrupted around descenders, which is nice. Unfortunately my
underlining code doesn't do this, and I can't see a simple way or
layout manager delegate method I could use to figure out where the
breaks should go. Is there somewhere else I should be looking, or is
there no public method to help here? If the latter, any ideas on how I
could figure out the break positions? All I need is a list of offsets
relative to the line fragment rect where the breaks are.
--Graham
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