Re: [dev-context] Bugs: align[outer] requires setuppagenumbering, and fails on odd pages

20 Feb 2012

      Sietse Brouwer wrote:
...
...
I tried making that alteration [see below] in
/opt/context/tex/texmf-context/tex/context/base/spac-ali.mkiv ,
but that didn't work. Was merely changing that file not enough, or
should I conclude that this fix does not work?
Wolfgang Schuster  wrote:
...
You have to regenerate the format (context --make en) when you patch a core file.
Just did so. The odd-page-invocations still fail. Does it work on your end?

As an aside, on the page [[Running Mark IV]] the wiki says
"Starting with 2011, formats are automatically (re)generated by
`context myfile.tex` when it believes it is necessary to do so.", so
perhaps the format does not need to be manually regenerated. But
that's not relevant to this bug, directly.
...
BTW: The location key for \setuplayout is to position the page on the paper when the have different sizes.
Ah, so doublesided typesetting is activated from \setuppagenumbering,
not from \setuplayout? Thanks for the tip.
Cheers,

Sietse
...
\setuppapersize[A5][A4]
\setuppagenumbering[alternative=doublesided]
\setuplayout       [location=doublesided]
\showframe
\starttext
\dorecurse{12}{\input knuth\par}
\stoptext
Wolfgang
(Reproducing here the patch Wolfgang sent me, as it didn't go to the
list the first time.)

\def\spac_align_flush_horizontal
  {\ifcase\c_spac_align_state_horizontal
     % 0
     \spac_align_set_horizontal_none
   \or
     % 1 center
     \ifcase\c_spac_align_state_broad
       \spac_align_set_horizontal_center
     \or
       \spac_align_set_horizontal_very_center
     \or
       \spac_align_set_horizontal_wide_center
     \fi
   \or
     % 2 flush left
     \ifcase\c_spac_align_state_broad
       \spac_align_set_horizontal_right
     \else
       \spac_align_set_horizontal_very_right
     \fi
   \or
     % 3 flush right
     \ifcase\c_spac_align_state_broad
       \spac_align_set_horizontal_left
     \else
       \spac_align_set_horizontal_very_left
     \fi
   \or
     % 4 inner
     \ifdoublesided
       \signalinnerrealign
     \fi
     \rightorleftpageaction\spac_align_set_horizontal_right\spac_align_set_horizontal_left
   \or
     % 5 outer
     \ifdoublesided
       \signalouterrealign
     \fi
 -    \rightorleftpageaction\c_spac_align_state_horizontal_left\spac_align_set_horizontal_right
 +    \rightorleftpageaction\spac_align_state_horizontal_left\spac_align_set_horizontal_right
   \or
     % 6 oneliner
     \ifcase\c_spac_align_state_broad
       \spac_align_set_horizontal_right
     \else
       \spac_align_set_horizontal_very_right
     \fi
     \parfillskip\zeropoint
   \or
     % 7 centered last line
     \spac_align_set_horizontal_centered_last_line
   \fi}