path: root/Master/texmf-dist/tex/context/base/lang-ini.mkiv

%D \module
%D   [       file=lang-ini,
%D        version=1996.01.25,
%D          title=\CONTEXT\ Language Macros,
%D       subtitle=Initialization,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

%D This module needs a further cleanup (real split between ii/iv).

%D This module implements the (for the moment still simple)
%D multi||language support of \CONTEXT, which should not be
%D confused with the multi||lingual interface. This support
%D will be extended when needed.

\writestatus{loading}{ConTeXt Language Macros / Initialization}

\registerctxluafile{lang-ini}{1.001}

\unprotect

% \def\testlanguage[#1]%
%   {\start
%    \language[#1]
%    \number\normallanguage/\the\lefthyphenmin/\the\righthyphenmin:
%    \input tufte
%    \hyphenatedword{effetestenofditwerkt}
%    \par
%    \stop}
%
% \testlanguage[de] \testlanguage[de-de] \testlanguage[de-at] \testlanguage[de-ch] \page
% \testlanguage[en] \testlanguage[us] \testlanguage[en-us] \testlanguage[uk] \testlanguage[en-gb] \page

\ifx\nonfrenchspacing\undefined \let\nonfrenchspacing\relax \fi
\ifx\frenchspacing   \undefined \let\frenchspacing   \relax \fi

%D When loading hyphenation patterns, \TEX\ assign a number to
%D each loaded table, starting with~0. Switching to a specific
%D table is done by assigning the relevant number to the
%D predefined \COUNTER\ \type{\language}.

%D We keep track of the last loaded patterns by means of a
%D pseudo \COUNTER. This just one of those situations in which
%D we don't want to spent a real one. Language zero has no
%D patterns, first of all because I like to start numbering
%D at one. It may come in handy for special purposes as well.

\normallanguage\zerocount \def\loadedlanguage{1}

%D \macros
%D   {currentlanguage, setupcurrentlanguage}
%D
%D Instead of numbers,we are going to use symbolic names for
%D the languages. The current langage is saved in the macro
%D \type {\currentlanguage}. The setup macro is mainly used
%D for cosmetic purposes.
%D
%D \starttyping
%D \dorecurse{3}
%D   {\language[nl]
%D    \startmode[*en] english \stopmode
%D    \startmode[*nl] dutch   \stopmode
%D    \language[en]
%D    \startmode[*en] english \stopmode
%D    \startmode[*nl] dutch   \stopmode}
%D \stoptyping

\let\currentlanguage    \empty
\let\currentmainlanguage\empty

\unexpanded\def\setupcurrentlanguage[#1]{\setcurrentlanguage\currentmainlanguage{#1}}

\def\setcurrentlanguage#1#2% sets modes: **id (currentmain) *id (current)
  {\edef\xaskedlanguage{#1}% otherwise clash with \askedlanguage
   \ifx\xaskedlanguage\empty \else
     \ifx\currentmainlanguage\empty\else\resetsystemmode{\systemmodeprefix\currentmainlanguage}\fi
     \let\currentmainlanguage\xaskedlanguage
     \setsystemmode{\systemmodeprefix\currentmainlanguage}%
   \fi
   \edef\xaskedlanguage{#2}%
   \ifx\xaskedlanguage\empty \else
     \ifx\currentlanguage\empty\else\resetsystemmode\currentlanguage\fi
     \let\currentlanguage\xaskedlanguage
     \setsystemmode\currentlanguage
   \fi}

%D The internal macros will be defined later.

%D \macros
%D   {installlanguage}
%D
%D Hyphenation patterns can only be loaded when the format file
%D is prepared. The next macro takes care of this loading. A
%D language is specified with
%D
%D \showsetup{installlanguage}
%D
%D When \type {state} equals \type {start}, both patterns
%D and additional hyphenation specifications are loaded. These
%D files are seached for on the system path and are to be
%D named:
%D
%D \starttyping
%D \f!languageprefix-identifier.\f!patternsextension
%D \f!languageprefix-identifier.\f!hyhensextension
%D \stoptyping
%D
%D The \type{spacing} variable specifies how the spaces after
%D punctuation has to be handled. English is by tradition more
%D tolerant to inter||sentence spacing than other languages.
%D
%D This macro also defines \type {\identifier} as a shortcut
%D switch to the language. Furthermore the command defined as
%D being language specific, are executed. With
%D \type {default} we can default to another language
%D (patterns) at format generation time. This default language
%D is overruled when the appropriate patterns are loaded (some
%D implementations support run time addition of patterns to a
%D preloaded format).

\def\dodoinstalllanguage#1#2% #2 added
  {\expanded{\noexpand\uppercase{\noexpand\edef\noexpand\ascii{#1}}}%
   \ifcsname    #1\endcsname\else\setvalue  {#1}{\complexlanguage[#2]}\fi
   \ifcsname\ascii\endcsname\else\setvalue\ascii{\complexlanguage[#2]}\fi}

%D \macros
%D   {preloadlanguages}
%D
%D We first try to load the files defined as file synonym
%D for \type {lang-*.pat} and \type {lang-*.hyp}. After that we
%D fall back on those files. The macro \type {\preloadpatterns}
%D reports which patterns are loaded and what hyphenmin
%D values are set.

\let\installedlanguages\empty

\def\doiflanguageelse#1{\doifdefinedelse{\??la#1\c!state}}

\def\doloadpatterns#1#2%
  {\ctxlua{languages.register(
      "#1",
      "#2",
      "\truefilename{\f!languageprefix#2.\f!patternsextension}",
      "\truefilename{\f!languageprefix#2.\f!hyphensextension }")
   }}

\def\doloadlanguagefiles#1%
  {\edef\languagesuffix{\specificlanguageparameter{#1}\s!patterns}%
   \ifx\languagesuffix\empty
     \edef\languagesuffix{\defaultlanguage{#1}}%
   \else\ifx\languagesuffix\relax
     \edef\languagesuffix{\defaultlanguage{#1}}%
   \fi\fi
   \ifx\languagesuffix\empty
     \edef\languagesuffix{#1}%
   \fi
   \doloadpatterns{#1}\languagesuffix}

\def\doinstalllanguage[#1][#2]%
  {\doifassignmentelse{#2}
     {\doiflanguageelse{#1}
        {\getparameters[\??la#1][#2]}
        {\setvalue{\l!prefix!#1}{#1}%
         \addtocommalist{#1}\installedlanguages
         \dodoinstalllanguage{#1}{#1}%
         \getparameters[\??la#1][\c!state=\v!start,#2]}%
      \doloadlanguagefiles{#1}}
     {\setvalue{\l!prefix!#1}{#2}%
      \getparameters[\??la#1][\s!default=#2]%
      \dodoinstalllanguage{#1}{#2}}}

\def\reallanguagetag#1%
  {\ifcsname\l!prefix!#1\endcsname\csname\l!prefix!#1\endcsname\else#1\fi}

% ^^ \language[#1] gave unwanted side effect of loading language specifics

\def\installlanguage
  {\dodoubleargument\doinstalllanguage}

%D When the second argument is a language identifier, a
%D synonym is created. This feature is present because we
%D used dutch mnemonics in the dutch version, but nowadays
%D conform a standard.

\def\doifpatternselse#1%
  {\ctxlua{cs.testcase(languages.loadable("#1"))}}

%D \macros
%D   {setuplanguage}
%D
%D Quick and dirty, but useful:
%D
%D \showsetup{setuplanguage}
%D
%D Beware, this command can only be used when a language is installed.

\unexpanded\def\setuplanguage
  {\dodoubleempty\dosetuplanguage}

\def\dosetuplanguage[#1][#2]% handy patch for testing
  {\ifsecondargument
     \getparameters[\??la#1][#2]%
     \doif{#1}\currentlanguage\docomplexlanguage
   \else
     \getparameters[\??la\currentlanguage][#1]%
     \docomplexlanguage
   \fi}

\setuplanguage
  [\s!default]
  [\s!lefthyphenmin=2,
   \s!righthyphenmin=2,
   \s!patterns=,
   \c!spacing=\v!packed,
   \c!lefthyphen=,
   \c!righthyphen=-,
   \c!hyphen=-,
   \c!midsentence=---,
   \c!leftsentence=---,
   \c!rightsentence=---,
   \c!leftsubsentence=---,
   \c!rightsubsentence=---,
   \c!leftquote=\upperleftsinglesixquote,
   \c!rightquote=\upperrightsingleninequote,
   \c!leftquotation=\upperleftdoublesixquote,
   \c!rightquotation=\upperrightdoubleninequote,
   \c!leftspeech=\languageparameter\c!leftquotation,
   \c!middlespeech=,
   \c!rightspeech=\languageparameter\c!rightquotation,
   \c!limittext=\unknown,
   \c!date={\v!year,\ ,\v!month,\ ,\v!day},
   \c!text=Ag]

% rather new, split and per language

\setuplanguage
  [\s!default]
  [\c!compoundhyphen=\compoundhyphen,
   \c!rightcompoundhyphen=\compoundhyphen,
   \c!leftcompoundhyphen=]

%D The values \type {leftsentence} and \type
%D {rightsentence} can be (and are) used to implement
%D automatic subsentence boundary glyphs, like in {\fr
%D |<|french guillemots|>|} or {\de |<|german guillemots|>|} or
%D {\nl |<|dutch dashes|>|} like situations. Furthermore \type
%D {leftquotation} and \type {leftquote} come into view
%D \quotation {when we quote} or \quote {quote} something.

%D \macros
%D  {currentdatespecification}
%D
%D Just to make things easy we can ask for the current date
%D specification by saying:

\def\currentdatespecification{\languageparameter\c!date}

%D This command is not meant for users.

%D Carefull reading of these macros shows that it's legal to
%D say
%D
%D \starttyping
%D \installlanguage [du] [de]
%D \stoptyping

%D \macros
%D   {language,mainlanguage}
%D
%D Switching to another language (actually another hyphenation
%D pattern) is done with:
%D
%D \starttyping
%D \language[identifier]
%D \stoptyping
%D
%D or with \type{\identifier}. Just to be compatible with
%D \PLAIN\ \TEX, we still support the original meaning, so
%D
%D \starttyping
%D \language=1
%D \stoptyping
%D
%D is a valid operation, where the relation between number
%D and language depends on the order in installing languages.
%D
%D \showsetup{language}
%D \showsetup{mainlanguage}
%D
%D Both commands take a predefined language identifier as
%D argument. We can use \type{\mainlanguage[identifier]} for
%D setting the (indeed) main language. This is the language
%D used for translating labels like {\em figure} and {\em
%D table}. The main language defaults to the current language.
%D
%D We take care of local as well as standardized language
%D switching (fr and fa, de and du, but nl and nl).

\def\dosetnormallanguage#1#2% current default
  {\edef\askedlanguagepatterns{\specificlanguageparameter{#1}\s!patterns}%
   \normallanguage=\ctxlua{tex.sprint(languages.enable({"\askedlanguagepatterns","#1","#2"}))}%
   \ifproductionrun
     \setxvalue{\??la\??la#1#2}{\number\normallanguage}%
   \fi}

\def\setnormallanguage#1#2% current default / we can freeze the number here
  {\ifcsname\??la\??la#1#2\endcsname
     \normallanguage\csname\??la\??la#1#2\endcsname % todo: we can set language at the lua end now
   \else
     \dosetnormallanguage{#1}{#2}%
   \fi}

\newtoks \everylanguage

\def\sethyphenationvariables % as we can have cloning we need to set it each time, unless we move all to lua
  {\ctxlua{languages.setup(tex.language, {
        lefthyphen  = "\languageparameter\c!lefthyphen",
        righthyphen = "\languageparameter\c!righthyphen",
    } )}%
   \lefthyphenmin \numexpr0\languageparameter\s!lefthyphenmin +\hyphenminoffset\relax
   \righthyphenmin\numexpr0\languageparameter\s!righthyphenmin+\hyphenminoffset\relax}

\def\docomplexlanguage% assumes that \currentlanguage is set
  {\edef\currentdefaultlanguage{\defaultlanguage\currentlanguage}%
   \setnormallanguage\currentlanguage\currentdefaultlanguage
   \the\everylanguage
   \sethyphenationvariables
   \relax
   % will be definable and move to core-spa !
   \doifelse{\languageparameter\c!spacing}\v!broad\nonfrenchspacing\frenchspacing}

% \mainlanguage[nl] \setuplanguage[nl][lefthyphen=,righthyphen=?]
%
% \dorecurse{100}{dit is toch wel een heel\normalhyphendiscretionary lang\normalhyphendiscretionary woord \recurselevel\ }
% \dorecurse{100}{dit is toch wel een heellangwoord \recurselevel\ }

% The following may be a solution for the fact that one cannot
% change catcodes of characters like : and ; inside an environment.

\def\complexlanguage[#1]%
  {\edef\askedlanguage{#1}%
   \ifx\askedlanguage\empty \else
     \ifcsname\l!prefix!\askedlanguage\endcsname
       \edef\askedlanguage{\csname\l!prefix!\askedlanguage\endcsname}%
       \ifx\currentlanguage\askedlanguage \else
         \setcurrentlanguage\currentmainlanguage\askedlanguage
         \docomplexlanguage
       \fi
     \else
       \showmessage\m!linguals6{#1}%
     \fi
   \fi}

\let\simplelanguage\normallanguage

\definecomplexorsimple\language

\def\mainlanguage[#1]%
  {\edef\askedlanguage{#1}%
   \ifx\askedlanguage\empty \else
     \ifcsname\l!prefix!\askedlanguage\endcsname
       \edef\askedlanguage{\csname\l!prefix!\askedlanguage\endcsname}%
       \ifx\currentlanguage\askedlanguage
         \ifx\currentmainlanguage\askedlanguage
         \else
           \setcurrentlanguage\askedlanguage\askedlanguage
           \docomplexlanguage
         \fi
       \else
         \setcurrentlanguage\askedlanguage\askedlanguage
         \docomplexlanguage
       \fi
     \fi
   \fi}

%D \macros
%D   {defaultlanguage,languageparameter,specificlanguageparameter}

\def\defaultlanguage#1%
  {\ifcsname\??la#1\s!default\endcsname
     \expandafter\defaultlanguage\csname\??la#1\s!default\endcsname
   \else
     #1%
   \fi}

\def\languageparameter#1%
  {\ifcsname\??la\currentlanguage#1\endcsname
     \csname\??la\currentlanguage#1\endcsname
   \else\ifcsname\??la\currentlanguage\s!default\endcsname
     \expandafter\specificlanguageparameter\csname\??la\currentlanguage\s!default\endcsname{#1}%
   \else\ifcsname\??la\s!default#1\endcsname
     \csname\??la\s!default#1\endcsname
   \fi\fi\fi}

\def\specificlanguageparameter#1#2%
  {\ifcsname\??la#1#2\endcsname
     \csname\??la#1#2\endcsname
   \else\ifcsname\??la#1\s!default\endcsname
     \expandafter\specificlanguageparameter\csname\??la#1\s!default\endcsname{#2}%
   \else\ifcsname\??la\s!default#2\endcsname
     \csname\??la\s!default#2\endcsname
   \fi\fi\fi}

%D New (see nomarking and nolist):

\def\splitsequence#1#2%
  {\doifelse{#1}\v!no{#2}{\doifelse{#1}\v!yes{\languageparameter\c!limittext}{#1}}}

\def\splitsymbol#1%
  {\splitsequence{#1}{\languageparameter\c!limittext}}

%D Just like with subsentence boundary symbols, quotes
%D placement depends on the current language, therefore we show
%D the defaults here.
%D
%D \def\ShowLanguageValues [#1] [#2] #3 #4
%D   {\blank
%D    \startlinecorrection
%D    \vbox\bgroup
%D    \language[#1]%
%D    \setbox0=\hbox to \hsize{\hss\bf#2 subsentence symbol and quotes\hss}
%D    \dp0=0pt
%D    \box0
%D    \vskip.5em
%D    \hrule
%D    \vskip.5em
%D    \let\normalbar=|
%D    \hbox to \hsize
%D      {\hfil\quotation{#3 #4}\hfil\quote{#2}\hfil
%D       \let|=\normalbar\strut|<||<|#3|>|#4|>|\hfil}
%D    \vskip.5em
%D    \hrule
%D    \egroup
%D    \stoplinecorrection
%D    \blank}
%D
%D \ShowLanguageValues [af] [afrikaans]  afrikaanse ...
%D \ShowLanguageValues [ca] [catalan]    catalan ...
%D \ShowLanguageValues [cs] [czech]      tjechisch tex
%D \ShowLanguageValues [cs] [slovak]     slowaakse ...
%D \ShowLanguageValues [da] [danish]     deense ...
%D \ShowLanguageValues [de] [german]     duitse degelijkheid
%D \ShowLanguageValues [en] [english]    engelse humor
%D \ShowLanguageValues [fi] [finnish]    finse ...
%D \ShowLanguageValues [fr] [french]     franse slag
%D \ShowLanguageValues [it] [italian]    italiaanse ...
%D \ShowLanguageValues [la] [latin]      latijnse missen
%D \ShowLanguageValues [nl] [dutch]      nederlandse zuinigheid
%D \ShowLanguageValues [nb] [bokmal]     noorse zalm
%D \ShowLanguageValues [nn] [nnynorsk]   noorse zalm
%D \ShowLanguageValues [pl] [polish]     poolse vlag
%D \ShowLanguageValues [pt] [portuguese] portugese ...
%D \ShowLanguageValues [es] [spanish]    spaans benauwd
%D \ShowLanguageValues [sv] [swedish]    zweedse ...
%D \ShowLanguageValues [tr] [turkish]    turks fruit

%D We support a lot of languages. These are specified and
%D loaded in separate files, according to their roots. Here
%D we only take care of (postponed) setting of the current
%D language.
%D
%D \unprotect
%D \placetable{The germanic languages (\type{lang-ger})}
%D \starttable[||||]
%D \HL
%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
%D \HL
%D \NC \s!nl        \NC dutch        \NC germanic  \NC\FR
%D \NC \s!en        \NC english      \NC germanic  \NC\MR
%D \NC \s!de        \NC german       \NC germanic  \NC\MR
%D \NC \s!da        \NC danish       \NC germanic  \NC\MR
%D \NC \s!sv        \NC swedish      \NC germanic  \NC\MR
%D \NC \s!af        \NC afrikaans    \NC germanic  \NC\MR
%D \NC \s!nb        \NC bokmal       \NC germanic  \NC\LR
%D \NC \s!nn        \NC nynorsk      \NC germanic  \NC\LR
%D \HL
%D \stoptable
%D \protect
%D
%D \unprotect
%D \placetable{The italic languages (\type{lang-ita})}
%D \starttable[||||]
%D \HL
%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
%D \HL
%D \NC \s!fr        \NC french       \NC italic    \NC\FR
%D \NC \s!ca        \NC catalan      \NC italic    \NC\MR
%D \NC \s!es        \NC spanish      \NC italic    \NC\MR
%D \NC \s!it        \NC italian      \NC italic    \NC\MR
%D \NC \s!la        \NC latin        \NC italic    \NC\MR
%D \NC \s!pt        \NC portuguese   \NC italic    \NC\LR
%D \HL
%D \stoptable
%D \protect
%D
%D \unprotect
%D \placetable{The slavic languages (\type{lang-sla})}
%D \starttable[||||]
%D \HL
%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
%D \HL
%D \NC \s!pl        \NC polish       \NC slavic    \NC\FR
%D \NC \s!cs        \NC czech        \NC slavic    \NC\MR
%D \NC \s!sk        \NC slavik       \NC slavic    \NC\LR
%D \HL
%D \stoptable
%D \protect
%D \unprotect
%D
%D \placetable{The altaic languages (\type{lang-alt})}
%D \starttable[||||]
%D \HL
%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
%D \HL
%D \NC \s!tr        \NC turkish      \NC altaic    \NC\SR
%D \HL
%D \stoptable
%D
%D \placetable{The uralic languages (\type{lang-ura})}
%D \starttable[||||]
%D \HL
%D \NC \bf mnemonic \NC \bf language \NC \bf group \NC\SR
%D \HL
%D \NC \s!fi        \NC finnish      \NC uralic    \NC\SR
%D \HL
%D \stoptable
%D \protect

% \bgroup \normallanguage255 \patterns{} \egroup
% \def\nopatterns{\normallanguage255 }

\def\nopatterns{\normallanguage\minusone}

%D We default to the language belonging to the interface. This
%D is one of the few places outside the interface modules where
%D \type{\startinterface} is used.

%D We default to english:

\setupcurrentlanguage[\s!en]

\def\initializemainlanguage
  {\mainlanguage[\currentlanguage]%
   \showmessage\m!linguals9\currentlanguage}

%D Might be in use:

\let\preloadallpatterns\relax % just for old times sake
\let\preloadlanguages  \relax % just for old times sake

\uchyph=1

\exhyphenchar=45 % to permit breaking at explicit hyphens

\protect \endinput