On Wed, 29 Jul 2020, Mike Cooper wrote:

> I would normally use tab stops and line breaks to achieve the following in a numbered list:
>
> 1.  DC     =  3.20 bbl =   420 ft
>    HWDP   =  3.90 bbl =   450 ft
>    DP     = 34.63 bbl = 2,037 ft
>    Totals = 41.73 bbl = 2,907 ft
>
> 2.  [next step …]
>
>
> This is what I tried, but the output has a blank line at the number.  I can’t find anything about tabulate inside itemize.
>
> ¥starttext
>
> ¥startitemize[n]
>            ¥startitem ¥starttabulate[|l|l|r|l|r|]
>                                    ¥NC DC ¥NC = ¥NC 3.20 bbl ¥NC = ¥NC 420 ft ¥NC ¥NR
>                                    ¥NC HWDP ¥NC = ¥NC 3.90 bbl ¥NC = ¥NC 450 ft ¥NC ¥NR
>                                    ¥NC DP ¥NC = ¥NC 34.63 bbl ¥NC =  ¥NC 2,037 ft ¥NC ¥NR
>                                    ¥NC DC ¥NC = ¥NC 41.73 bbl ¥NC =  ¥NC 2,907 ft ¥NC ¥NR
>                                    ¥stoptabulate ¥stopitem
>            ¥startitem Convert 2,907 to TVD: ¥¥TVD = 2,907 × cosine 45° = 2,907 × 0.707 = 2,056 ft ¥stopitem
>            ¥startitem ΔP = 2,056 ft × 0.052 × (15 - 7.2) = 834 psi
> ¥stopitemize
>
> ¥stoptext

Naive solution: Add a ¥hbox around tabulate:


¥defineframed[tabulateframed][location=top,frame=off]

¥starttext

¥startitemize[n]
             ¥startitem ¥dontleavehmode
               ¥tabulateframed{¥starttabulate[|l|l|r|l|r|]
                                     ¥NC DC ¥NC = ¥NC 3.20 bbl ¥NC = ¥NC 420 ft ¥NC ¥NR
                                     ¥NC HWDP ¥NC = ¥NC 3.90 bbl ¥NC = ¥NC 450 ft ¥NC ¥NR
                                     ¥NC DP ¥NC = ¥NC 34.63 bbl ¥NC =  ¥NC 2,037 ft ¥NC ¥NR
                                     ¥NC DC ¥NC = ¥NC 41.73 bbl ¥NC =  ¥NC 2,907 ft ¥NC ¥NR
                                     ¥stoptabulate} ¥stopitem
             ¥startitem Convert 2,907 to TVD: ¥¥TVD = 2,907 × cosine 45° = 2,907 × 0.707 = 2,056 ft ¥stopitem
             ¥startitem ΔP = 2,056 ft × 0.052 × (15 - 7.2) = 834 psi
¥stopitemize

¥stoptext

Normally, you can fix such issues by appending a ¥dontleavehmode in front of the command but that doesn't work here. The offending code is line 1300 of tabl-tbl.mkxl:

¥unexpanded¥def¥tabl_tabulate_outside_before
   {¥ifhmode¥par¥fi
    ¥ifhmode
      ¥vbox¥bgroup
      ¥let¥tabl_tabulate_outside_after    ¥egroup
      ¥let¥tabl_tabulate_outside_inbetween¥relax
    ¥orelse¥ifinner
      ¥let¥tabl_tabulate_outside_after    ¥relax
      ¥let¥tabl_tabulate_outside_inbetween¥relax
    ¥else
      ¥whitespace
      ¥tabulationparameter¥c!before
      ¥relax
      ¥let¥tabl_tabulate_outside_after    ¥tabl_tabulate_outside_after_indeed
      ¥let¥tabl_tabulate_outside_inbetween¥tabl_tabulate_outside_inbetween_indeed
    ¥fi}
¥protect

When you use ¥dontleavehmode¥starttabulate, ¥starttabulate starts in horizontal mode but the first ¥par in the above command takes it back to vertical mode. The next ¥ifhmode then evaluates to false, ¥ifinner also evaluates to false, so we enter the ¥else loop which inserts a ¥whitespace.

The reason why adding a ¥hbox{...} (which is what ¥framed without an align key does) works is because inside an ¥hbox{...} ¥par doesn't take TeX back to vertical mode. So, we enter the first branch.

Aditya