%D \module
%D   [       file=typo-inj,
%D        version=2014.10.13,
%D          title=\CONTEXT\ Typesetting Macros,
%D       subtitle=Triggering Actions,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

\writestatus{loading}{ConTeXt Typesetting Macros / Triggering Actions}

%D This is a sort of escape from too automatic typesetting of lists. I have
%D been thinking fo a more generic injector for instance based on tags (as we
%D already index each element) but thi sis sort of fuzzy because the number of a
%D tag is not always incremented before we check for it. Also, registers and lists
%D are among the few candidates that cannot be controlled directly by putting
%D something in the input. So,m for the moment I stick to this mechanism but
%D future versions of \CONTEXT\ might do it differently. Compatibility is not much
%D of an issue here as this mechanism is only to be used in final production runs.

\unprotect

\registerctxluafile{typo-inj}{}

% todo: no need in trialmode

%D \showinjector
%D
%D \setinjector[register][3][\column]
%D \setinjector[list]    [2][{\blank[3*big]}]
%D
%D \starttext
%D     \placelist[section][criterium=text]
%D     \blank[3*big]
%D     \placeregister[index][criterium=text]
%D     \page
%D     \startsection[title=Alpha] first  \index{first}  \stopsection
%D     \startsection[title=Beta]  second \index{second} \stopsection
%D     \startsection[title=Gamma] third  \index{third}  \stopsection
%D     \startsection[title=Delta] fourth \index{fourth} \stopsection
%D \stoptext

\unexpanded\def\resetinjector                [#1]{\clf_resetinjector{#1}}
\unexpanded\def\markinjector                 [#1]{\dontleavehmode\clf_markinjector{#1}}
\unexpanded\def\docheckinjector          [#1][#2]{\clf_checkinjector{#1}{#2}}
\unexpanded\def\checknextinjector            [#1]{\clf_checkinjector{#1}{\v!next}}
\unexpanded\def\checkpreviousinjector        [#1]{\clf_checkinjector{#1}{\v!previous}}
%unexpanded\def\checknextinjector            [#1]{\clf_checknextinjector{#1}}
%unexpanded\def\checkpreviousinjector        [#1]{\clf_checkpreviousinjector{#1}}
\unexpanded\def\dosetinjector        [#1][#2][#3]{\clf_setinjector{#1}{#2}{#3}}
\unexpanded\def\doshowinjector               [#1]{\clf_showinjector{#1}}

\unexpanded\def\checkinjector{\dodoubleempty   \docheckinjector}
\unexpanded\def\setinjector  {\dotripleargument\dosetinjector}
\unexpanded\def\showinjector {\dosingleempty   \doshowinjector}

\unexpanded\def\domarkinjector#1#2% called at the lua end
  {\dontleavehmode\llap{\infofont\ifcase#1\else\red\fi<#2>\quad}}

% low level definers .. we could have \injectors_mark and \injectors_check and then
% use \v!list instead of \s!list

\unexpanded\def\doinstallinjector#1%
  {\letvalue{typo_injectors_mark_#1}\donothing
   \letvalue{typo_injectors_check_#1}\donothing}

\unexpanded\def\doactivateinjector#1% used at lua end
  {\setuxvalue{typo_injectors_mark_#1}{\dontleavehmode\noexpand\clf_markinjector{#1}}%
   \setuxvalue{typo_injectors_check_#1}{\noexpand\clf_checkinjector{#1}}}

\unexpanded\def\dotestinjector#1%  only for testing outside unprotect
  {\csname typo_injectors_check_#1\endcsname
   \csname typo_injectors_mark_#1\endcsname}

\protect \endinput