> The sort of thing I have in mind is targeted right at the line which
> is about to be output, as follows lines. Suppose you have formatted
> output lines (say, as you mentioned, in a narrow-column context)
> like:
>
> This formatted line needs
> smaller spaces. So track kern-
> ing can be used to reduce them.
You are aware how the corresponding node list(s) looks like?
> If you had a "pre-output" macro (just as you can have macros which
> are sprung by bottom-of-page, so you could have macros sprung by
> "about to output line"), then this could look at [...]
Similar to TeX I think it is next to impossible to find a suitable
macro interface for the things you want to do.
> a) Inter-word spaces: if larger than a threshold, expand the
> inter-character space until these are reduced below it.
Instead of handling this with a macro I could imagine to set and unset
a flag which makes troff do that.
> b) Is there an end-of-line character (like the soft hyphen above,
> which might not have been explicit in the source) which we would
> like to hang over the end of the line? Then slightly increase
> the linelength of this line (or redefine "-" to have smaller
> width, or whatever) so that it sticks out by the right amount.
Ditto.
Werner
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