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%D \module
%D [ file=typo-spa,
%D version=2009.03.27, % code moved from cors-spa.mkiv
%D title=\CONTEXT\ Typesetting Macros,
%D subtitle=Spacing,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright=\PRAGMA]
%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 / Spacing}
\unprotect
\registerctxluafile{typo-spa}{1.001}
\definesystemattribute[spacing]
% experimental spacing
%
% test: oeps {\setcharacterspacing[frenchpunctuation]x: xx \bfd x: xx} oeps: test
\newcount \maxcharacterspacingid
\def\definecharacterspacing[#1]%
{\ifcsname\??ch#1\endcsname \else
\global\advance\maxcharacterspacingid\plusone
\setxvalue{\??ch:#1}{\the\maxcharacterspacingid}%
\fi}
\def\setupcharacterspacing
{\dotripleargument\dosetupcharacterspacing}
\def\dosetupcharacterspacing[#1][#2][#3]%
{\ifcsname\??ch:#1\endcsname
\begingroup % for the moment we use modes, in ordere to avoid interface translation
\getparameters[\??ch][\c!left=0,\c!right=0,\c!alternative=0,#3]%
\ctxlua{spacings.setspacing(\getvalue{\??ch:#1},\number#2,\@@chleft,\@@chright,\@@chalternative)}%
\endgroup
\fi}
\def\setcharacterspacing
{\ctxlua{spacings.enabled=true}%
\gdef\setcharacterspacing[##1]{\dosetattribute{spacing}{\csname\??ch:##1\endcsname}}%
\setcharacterspacing}
\def\resetcharacterspacing
{\doresetattribute{spacing}}
\letvalue{\??ch:\s!reset}\attributeunsetvalue
% \setcharacterspacing[frenchpunctuation]
% «\type{bla}»\crlf « \type{bla}»\crlf
% «bla »\crlf « bla»\crlf « bla »\crlf
% bla: bla\crlf bla : bla
\definecharacterspacing [frenchpunctuation] % name may change / unit is em
\setupcharacterspacing [frenchpunctuation] ["003A] [\c!left =.25,\c!alternative=1] % : % strip preceding space(char)
\setupcharacterspacing [frenchpunctuation] ["003B] [\c!left =.25,\c!alternative=1] % ; % strip preceding space(char)
\setupcharacterspacing [frenchpunctuation] ["003F] [\c!left =.25,\c!alternative=1] % ? % strip preceding space(char)
\setupcharacterspacing [frenchpunctuation] ["0021] [\c!left =.25,\c!alternative=1] % ! % strip preceding space(char)
\setupcharacterspacing [frenchpunctuation] ["00AB] [\c!right=.25,\c!alternative=1] % guillemotleft/leftguillemot % strip following space(char)
\setupcharacterspacing [frenchpunctuation] ["00BB] [\c!left =.25,\c!alternative=1] % guillemotright/rightguillemot % strip preceding space(char)
\protect \endinput
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