[dev-context] Wrong structure numbers in margin

[Marco]

Hi Hans,

could you check the definition of \placeheadmarginalternative in
strc-ren.mkiv? The current solution fails when structure number are
set to “margin” in a doublesided layout because of the hard-coded
\leftmargindistance. The “maybe better” solution actually seems to
work better.

\setuplayout
  [backspace=8cm,
   width=5cm,
   leftmargindistance=2cm]

\setuppagenumbering
  [alternative=doublesided]

\setupheads
  [alternative=margin]

\unexpanded\def\placeheadmarginalternative#1#2%
  {\vbox
     {\localheadsetup
      \begstrut % use one \strut here!
      \dontleavehmode % in case there is no strut, else side effects with llap
      \ifconditional\headshownumber
				% this gives a wrong result on the second page
        %\llap{\hbox{\hfill{#1}\hskip\localheadskip\hskip\leftmargindistance}}% introduces whitespace
        % maybe better:
         \inleftmargin{\hbox{\hss{#1}\hskip\localheadskip}}%
      \fi
      {#2}}}

\showframe
\starttext
  \chapter{Chapter}
  \null\page
  \section{Section}
  \subsection{Subsection}
  \subsubsection{Subsubsection}
\stoptext


Regards

Marco Patzer