type-ini.mkvi / last modification: 2020-01-30 14:16
%D \module
%D   [       file=type-ini,
%D        version=2001.03.05,
%D          title=\CONTEXT\ Typescript Macros,
%D       subtitle=Initialization,
%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 Typescript Macros / Initialization}

\registerctxluafile{type-ini}{}

%D The default fontclass is empty. We could demand always using fontclasses, and
%D then make the calling macros simplier (always assume fontclass) but apart from
%D downward compatibility issues, it would make global, class spanning definitions a
%D pain. Some day we will introduce a default class.
%D
%D The \type {type-ini} and \type {font-ini} modules come as a pair and have mutual
%D dependencies.
%D
%D At some point we will only store in memory so some code can go away.

\unprotect

\definesystemvariable {ts} % TypeScript / for the moment we keep this one

\newcount      \c_font_typescripts_n_of_preloaded
\newconditional\c_font_typescripts_quit
\newtoks       \c_font_typescripts_document
\newconditional\c_font_typescripts_preload
\newconditional\c_font_typescripts_first_pass          \settrue\c_font_typescripts_first_pass

\newif         \iftypescriptfound              % will become a mode
\newif         \iftracetypescripts

\newtoks       \everybeforedefinetypeface
\newtoks       \everyafterdefinetypeface

\let\typescriptfiles   \empty
\let\currenttypescripts\empty
\let\currenttypefile   \empty

\installmacrostack\currenttypefile

\let\typescriptone  \empty % public, used in typescripts
\let\typescripttwo  \empty % public, used in typescripts
\let\typescriptthree\empty % public, used in typescripts

\installmacrostack\typescriptone
\installmacrostack\typescripttwo
\installmacrostack\typescriptthree

\let\fontclassstyle \empty

\installmacrostack\fontclassstyle

\let\m_font_typescripts_one  \empty
\let\m_font_typescripts_two  \empty
\let\m_font_typescripts_three\empty
\let\m_font_typescripts_check\empty
\let\m_font_typescripts_match\empty

\installmacrostack\m_font_typescripts_one
\installmacrostack\m_font_typescripts_two
\installmacrostack\m_font_typescripts_three

\let\t_font_typescripts\relax % uses as synonym

\installcorenamespace{typescriptcache}
\installcorenamespace{typescriptfiles}
\installcorenamespace{typescriptonce}
\installcorenamespace{typescriptsynonyms}
\installcorenamespace{typescriptprefix}
\installcorenamespace{typescriptinheritances}
\installcorenamespace{typescriptdefaultstyles}
\installcorenamespace{typescriptrelatives}

\definesystemvariable{ts} % TypeScript

% tricky ... here we push/pop ... so \let

\let\typescriptmethod\plusone % 1: empty==all==true  2: empty==false
\let\typescriptstate \plustwo % 1: process 2: store

\installmacrostack\typescriptmethod
\installmacrostack\typescriptstate

\unexpanded\def\starttypescriptcollection
  {\dosingleempty\font_typescripts_collection_start}

\def\font_typescripts_collection_start[#tag]%
  {}

\let\stoptypescriptcollection\relax

\unexpanded\def\usetypescriptfile[#filename]%
  {\doifelse{#filename}\v!reset
     {\let\typescriptfiles\empty}
     {\splitfilename{#filename}%
      \addtocommalist\splitoffbase\typescriptfiles}}

\unexpanded\def\usetypescript     {\dotripleempty\font_typescripts_use_one}
\unexpanded\def\usetypescriptexact{\dotripleempty\font_typescripts_use_two}

\def\font_typescripts_use_one{\let\typescriptmethod\plusone\font_typescripts_use}
\def\font_typescripts_use_two{\let\typescriptmethod\plustwo\font_typescripts_use}

\installmacrostack\stoptypescript

\unexpanded\def\font_typescripts_use[#one][#two][#three]%
  {\push_macro_m_font_typescripts_one
   \push_macro_m_font_typescripts_two
   \push_macro_m_font_typescripts_three
   \edef\m_font_typescripts_one  {\truetypescript{#one}}%
   \edef\m_font_typescripts_two  {\truetypescript{#two}}%
   \edef\m_font_typescripts_three{\truetypescript{#three}}%
   \push_macro_typescriptone
   \push_macro_typescripttwo
   \push_macro_typescriptthree
   \push_macro_typescriptmethod
   \push_macro_typescriptstate
   \push_macro_stoptypescript
   \typescriptfoundfalse
   \let\typescriptstate\plusone % why
   \iftracetypescripts
     \writestatus\m!fonts{request: [\m_font_typescripts_one] [\m_font_typescripts_two] [\m_font_typescripts_three]}%
   \fi
   \ifhmode
     \font_typescripts_use_inline
   \else
     \font_typescripts_use_display
   \fi
   \setfalse\c_font_typescripts_first_pass
   \pop_macro_stoptypescript
   \pop_macro_typescriptstate
   \pop_macro_typescriptmethod
   \pop_macro_typescriptthree
   \pop_macro_typescripttwo
   \pop_macro_typescriptone
   \pop_macro_m_font_typescripts_three
   \pop_macro_m_font_typescripts_two
   \pop_macro_m_font_typescripts_one}

\def\font_typescripts_use_display
  {\processcommacommand[\typescriptfiles]\font_typescripts_load_file
   \the\c_font_typescripts_document}

\let\font_typescripts_use_inline\font_typescripts_use_display

% % not yet:
%
% \newsignal\d_font_typescripts_signal
%
% \def\font_typescripts_use_inline
%   {\ifhmode
%      \kern\d_font_typescripts_signal
%    \fi
%    \font_typescripts_use_display
%    \ifhmode
%      \ifdim\lastkern=\d_font_typescripts_signal
%        \unkern
%      \else
%        \removeunwantedspaces
%        \ifdim\lastkern=\d_font_typescripts_signal
%          \unkern
%        \else
%          % messy typescript 2
%        \fi
%      \fi
%    \else
%      % messy typescript 1
%    \fi}

\unexpanded\def\preloadtypescripts
  {\ifproductionrun\settrue\c_font_typescripts_preload\fi}

\prependtoks
    \preloadtypescripts
\to \everyjob

%D The next will change .. we can load a file inside a typescript but as the state is
%D 1 then, it doesn't get stored without doing that explicitly

\unexpanded\def\loadtypescriptfile[#1]%
  {\push_macro_typescriptstate
   \let\typescriptstate\plustwo % assumes 2 at the outer level
   \clf_loadtypescriptfile{#1}%
   \pop_macro_typescriptstate}

\unexpanded\def\loadfoundtypescriptfile#1#2% name foundname / not a user command
  {\startreadingfile
   \unprotect
   \pushendofline
   \input{#2}%
   \popendofline
   \protect
   \stopreadingfile}

\unexpanded\def\quittypescriptscanning
  {\settrue\c_font_typescripts_quit} % public

\def\font_typescripts_start_store#definitions\stoptypescript
  {\global\advance\c_font_typescripts_n_of_preloaded\plusone
   \expandafter\normalgdef\csname\??typescriptcache\the\c_font_typescripts_n_of_preloaded\endcsname
     {\starttypescript#definitions\stoptypescript}%
   \gtoksapp\t_font_typescripts\expandafter
     {\csname\??typescriptcache\the\c_font_typescripts_n_of_preloaded\endcsname}}

\def\font_typescripts_collection_start_store#definitions\stoptypescriptcollection
  {\global\advance\c_font_typescripts_n_of_preloaded\plusone
   \expandafter\normalgdef\csname\??typescriptcache\the\c_font_typescripts_n_of_preloaded\endcsname
     {\starttypescriptcollection#definitions\stoptypescriptcollection}%
   \gtoksapp\t_font_typescripts\expandafter
     {\csname\??typescriptcache\the\c_font_typescripts_n_of_preloaded\endcsname}}

\def\font_typescripts_load_file#filename%
  {\setfalse\c_font_typescripts_quit
   \push_macro_currenttypefile
   \def\currenttypefile{#filename}%
   \ifconditional\c_font_typescripts_preload
     \font_typescript_process_typescript_file_and_store
   \else
     \font_typescript_process_typescript_file
   \fi
   \pop_macro_currenttypefile
   \ifconditional\c_font_typescripts_quit
     \quitcommalist
     \setfalse\c_font_typescripts_quit
   \fi}

\def\font_typescript_process_typescript_file_and_store
  {\expandafter\let\expandafter\t_font_typescripts\csname\??typescriptfiles\currenttypefile\endcsname
   \ifx\t_font_typescripts\relax
     \font_typescript_process_typescript_store_indeed
   \fi
   \the\t_font_typescripts}

\def\font_typescript_process_typescript_store_indeed
  {\newtoks\t_font_typescripts % is \relaxed elsewhere
   \begingroup
     \let\starttypescript          \font_typescripts_start_store
     \let\starttypescriptcollection\font_typescripts_collection_start_store
     \font_typescript_process_typescript_file
   \endgroup
   \expandafter\let\csname\??typescriptfiles\currenttypefile\endcsname\t_font_typescripts}

\def\font_typescript_process_typescript_file
  {\clf_doprocesstypescriptfile{\currenttypefile}}

\unexpanded\def\usetypescriptonce
  {\dotripleempty\font_typescripts_use_once}

\def\font_typescripts_use_once[#one][#two][#three]%
  {\ifcsname\??typescriptonce#one:#two:#three\endcsname
     \writestatus\m!fonts{once (#one) (#two) (#three)}%
   \else
     \expandafter\let\csname\??typescriptonce#one:#two:#three\endcsname\relax
     \font_typescripts_use[#one][#two][#three]%
   \fi}

% \definetypescriptsynonym[lbr][cmr]

\unexpanded\def\definetypescriptsynonym
  {\dodoubleempty\font_typescripts_synonym_define}

\def\font_typescripts_synonym_define[#name][#synonym]%
  {\ifsecondargument\setevalue{\??typescriptsynonyms#name}{#synonym}\fi}

\def\truetypescript#name% recursive so no \lastnamedcs
  {\ifcsname\??typescriptsynonyms#name\endcsname
    %\expandafter\truetypescript\csname\??typescriptsynonyms#name\endcsname
     \expandafter\truetypescript\lastnamedcs
   \else
     #name%
   \fi}

% script [serif] [default]         [size]
% script [serif] [computer-modern] [size]
% script [serif] [computer-modern] [ec]
% script [serif] [computer-modern] [name]
% script [serif] [computer-modern] [special]

\prependtoks
    \settrue\c_font_typescripts_first_pass
\to \everyjob

\unexpanded\def\starttypescript
  {\ifcase\typescriptstate
     % 0 = skip
     \expandafter\font_typescripts_start_gobble
   \or
     % 1 = process
     \expandafter\font_typescripts_start_process
   \or
     % 2 = store
     \expandafter\font_typescripts_start_document
   \else
     % ? = skip
     \expandafter\font_typescripts_start_gobble
   \fi}

\def\font_typescripts_start_gobble#definitions\stoptypescript{}

\def\font_typescripts_start_document#definitions\stoptypescript
  {\toksapp\c_font_typescripts_document{\starttypescript#definitions\stoptypescript}}

\def\font_typescripts_start_process % could be a faster \doifelsenextoptionalif needed
  {\let\typescriptone  \m_font_typescripts_one
   \let\typescripttwo  \m_font_typescripts_two
   \let\typescriptthree\m_font_typescripts_three
   \let\m_font_typescripts_match\empty
   \doifelsenextoptionalcs\font_typescripts_start_process_one\font_typescripts_start_process_all}

\def\font_typescripts_start_process_all % could be a \let
  {\ifconditional\c_font_typescripts_first_pass
     \expandafter\font_typescripts_start_process_indeed
   \else
     % skip this since it may do unwanted resets, like
     % setting symbolic font names to unknown, especially
     % in run time user type scripts
     \expandafter\font_typescripts_start_gobble
   \fi}

\def\font_typescripts_show_match
  {\writestatus\m!fonts{match:\ifx\currenttypefile\relax\space *\fi \m_font_typescripts_match}}

\def\font_typescripts_start_process_yes
  {\ifdone
     \typescriptfoundtrue
     \iftracetypescripts\font_typescripts_show_match\fi
     \expandafter\font_typescripts_start_process_indeed
   \else
     \expandafter\font_typescripts_start_gobble
   \fi}

\def\font_typescripts_start_process_one
  {\font_typescripts_check\m_font_typescripts_one\typescriptone\font_typescripts_start_process_again_one}

\def\font_typescripts_start_process_two
  {\font_typescripts_check\m_font_typescripts_two\typescripttwo\font_typescripts_start_process_again_two}

\def\font_typescripts_start_process_three
  {\font_typescripts_check\m_font_typescripts_three\typescriptthree\font_typescripts_start_process_again_three}

\def\font_typescripts_start_process_again_one
  {\doifelsenextoptionalcs\font_typescripts_start_process_two\font_typescripts_start_process_yes}

\def\font_typescripts_start_process_again_two
  {\doifelsenextoptionalcs\font_typescripts_start_process_three\font_typescripts_start_process_yes}

\let\font_typescripts_start_process_again_three\font_typescripts_start_process_yes

\def\font_typescripts_start_process_indeed
  {\push_macro_fontclass}

\unexpanded\def\stoptypescript
  {\pop_macro_fontclass}

\def\font_typescripts_check#asked#target#followup[#value]% script use value next
  {\donefalse
   \edef\m_font_typescripts_check{#value}%
   \ifx\m_font_typescripts_check\empty % no longer needed / met
     \ifcase\typescriptmethod\or\donetrue\fi
   \else\ifx#asked\s!all
     \donetrue
   \else\ifx\m_font_typescripts_check\s!all
     \donetrue
   \else\ifx#asked\m_font_typescripts_check % saves 10% trace so probably faster too
     \donetrue
     \let#target\m_font_typescripts_check
   \else
     \doifelsecommon\m_font_typescripts_check#asked\donetrue\donefalse
     \ifdone
       \let#target\commalistelement
     \fi
   \fi\fi\fi\fi
   \ifdone
     \iftracetypescripts\extendtypescriptmatch\fi
     \expandafter#followup%
   \else
     \expandafter\font_typescripts_start_gobble
   \fi}

% \def\font_typescripts_check#asked#target#followup[#value]% script use value next
%   {\donefalse
%    \edef\m_font_typescripts_check{#value}%
%    \ifx\m_font_typescripts_check\empty % no longer needed / met
%      \ifcase\typescriptmethod\or\donetrue\fi
%    \else\ifx#asked\s!all
%      \donetrue
%    \else\ifx\m_font_typescripts_check\s!all
%      \donetrue
%    \else\ifx#asked\m_font_typescripts_check % saves 10% trace so probably faster too
%      \donetrue
%      \let#target\m_font_typescripts_check
%    \else\ifcondition\hascommonargumentcondition\m_font_typescripts_check#asked%
%      \donetrue
%      \let#target\commalistelement
%    \fi\fi\fi\fi\fi
%    \ifdone
%      \iftracetypescripts\extendtypescriptmatch\fi
%      \expandafter#followup%
%    \else
%      \expandafter\font_typescripts_start_gobble
%    \fi}

\def\extendtypescriptmatch
  {\edef\m_font_typescripts_match{\m_font_typescripts_match\space[\m_font_typescripts_check]}}

%D Map files will go away in \LUATEX, but till that happens we use stripped down
%D support for loading them.

\unexpanded\def\loadmapfile{\dosingleempty\font_map_load_file}
\unexpanded\def\loadmapline{\dodoubleempty\font_map_load_line}

\def\font_map_load_file[#filename]%
  {\clf_loadmapfile{#filename}}

\def\font_map_load_line[#kind][#data]%
  {\clf_loadmapline{#kind}{#data}}

\unexpanded\def\forgetmapfiles
  {\clf_resetmapfiles}

% \prependtoks
%     \loadmapfile[mkiv-base.map]% can't we preload this one?
% \to \everystarttext

%D A handy shortcut:

% \definetypescriptprefix[serif][Serif]
% \definetypescriptprefix[sans] [Sans]
% \definetypescriptprefix[mono] [Mono]
%
%\starttypescript [serif,sans,mono] [handling,hanging,hz] [pure,normal,hz,quality]
%  \setupfontsynonym [\typescriptprefix\typescriptone] [handling=\typescriptthree]
% \stoptypescript

\unexpanded\def\definetypescriptprefix
  {\dodoubleargument\font_typescripts_define_prefix}

\def\font_typescripts_define_prefix[#name][#prefix]%
  {\setgvalue{\??typescriptprefix#name}{#prefix}} % made global

% without testing:
%
% \def\typescriptprefix#name%
%   {\csname\??typescriptprefix#name\endcsname}
%
% with testing:

\def\typescriptprefix#name%
 %{\ifcsname\??typescriptprefix#name\endcsname\csname\??typescriptprefix#name\endcsname\else#name\fi}
  {\ifcsname\??typescriptprefix#name\endcsname\lastnamedcs\else#name\fi}

% defining typefaces:
%
% \definetypeface [joke] [rm]
% \definetypeface [joke] [rm] [settings]
% \definetypeface [joke] [rm] [serif] [lucida]
% \definetypeface [joke] [rm] [serif] [lucida] [size]
% \definetypeface [joke] [rm] [serif] [lucida] [size] [settings]
% \definetypeface [joke] [specification]

\unexpanded\def\definetypeface
  {\dosixtupleargument\font_typefaces_define}

\appendtoks
    \font_helpers_reset_fontclass_math_families\fontclass
\to \everybeforedefinetypeface

%D This hooks into the font switcher:

\settrue\autotypescripts

\unexpanded\def\trycurrentfontclass#typeface%
  {\ifconditional\autotypescripts
     \usetypescript[#typeface]%
     \ifcsname\??fontclassyes#typeface\endcsname
       \edef\fontclass{#typeface}%
     \else
       \iftracetypescripts\writestatus\m!fonts{auto load typescript file 1: [#typeface]}\fi
       \usetypescriptfile[#typeface]%
       \usetypescript[#typeface]%
       \ifcsname\??fontclassyes#typeface\endcsname
         \edef\fontclass{#typeface}%
       \else
         % todo: message
         \letvalueempty{\??fontclassnop#typeface}%
       \fi
     \fi
   \else
     % todo: message
     \letvalueempty{\??fontclassnop#typeface}%
   \fi}

%D Now we define:

\def\font_typefaces_define
  {\iffifthargument
     \singleexpandafter\font_typefaces_define_a
   \else\iffourthargument
     \doubleexpandafter\font_typefaces_define_b
   \else\ifthirdargument
     \tripleexpandafter\font_typefaces_define_c
   \else
     \tripleexpandafter\font_typefaces_define_d
   \fi\fi\fi}

\def\font_typefaces_define_a[#name][#style][#fontshape][#fontname][#fontsize][#settings]%
  {\iftracetypescripts\writestatus\m!fonts{define: [#name] [#style] [#fontshape] [#fontname]}\fi
   \font_typefaces_define_indeed[#name][#style]%
   \font_typefaces_defining_start{#name}{#style}{#settings}%
     \font_typescripts_use_one[#fontshape][#fontname][\s!name]% [\s!name,\s!default]%
     \iftypescriptfound
       % we're okay
     \else
       \ifconditional\autotypescripts
         \iftracetypescripts\writestatus\m!fonts{auto load typescript file 2: [#fontname]}\fi
         \usetypescriptfile[#fontname]%
         \font_typescripts_use_one[#fontshape][#fontname][\s!name]% [\s!name,\s!default]%
       \fi
     \fi
     \font_typescripts_use_one[#fontshape][#fontsize][\s!size]%
   \font_typefaces_defining_stop}

\def\font_typefaces_define_b[#name][#style][#fontshape][#fontname][#dummya][#dummyb]%
  {\font_typefaces_define_a[#name][#style][#fontshape][#fontname][\s!default][#dummyb]}

\def\font_typefaces_define_c[#name][#style][#dummya][#dummyb][#dummyc][#dummyd]%
  {\font_typefaces_define_indeed[#name][#style]}

\def\font_typefaces_define_d[#name][#specification][#dummya][#dummyb][#dummyc][#dummyd]% use definitions in lfg file
  {\clf_definetypeface{#name}{#specification}}

\def\font_typefaces_define_indeed[#name][#style]% saveguard against redefinition
  {\doifsomething{#name}
     {\ifcsname\??typescriptdefaultstyles#name\endcsname \else
        \registerfontclass{#name}%
        \setxvalue{\??typescriptdefaultstyles#name}{#style}%
      \fi
      \ifcsname#name\endcsname \else
        \setugvalue{#name}{\switchtotypeface[#name][#style]}%
      \fi}}

\def\font_typefaces_defining_start#name#style#settings%
  {\let\@@tsrscale    \!!plusone % as we push/pop
   \let\@@tsfeatures  \empty
   \let\@@tsfallbacks \empty
   \let\@@tsgoodies   \empty
   \let\@@tsdirection \empty
   \let\@@tsdesignsize\empty
   \geteparameters[\??ts][#settings]% todo raw
   \push_macro_fontclass
   \push_macro_fontclassstyle
   \setcurrentfontclass{#name}%
   \savefontclassparameters{#style}\@@tsrscale\@@tsfeatures\@@tsfallbacks\@@tsgoodies\@@tsdesignsize\@@tsdirection
   \the\everybeforedefinetypeface}

\def\tsvar#key#default% undocumented and unofficial
  {\expandafter\ifx\csname\??ts#key\endcsname\empty
     #default%
   \else
     \csname\??ts#key\endcsname
   \fi}

\def\font_typefaces_defining_stop
  {\the\everyafterdefinetypeface
   \pop_macro_fontclassstyle
   \pop_macro_fontclass}

\def\dofastdefinetypeface#name#style#fontshape#fontsize#settings% called from the lua end (via case d)
  {\font_typefaces_define_indeed[#name][#style]%
   \font_typefaces_defining_start{#name}{#style}{#settings}%
   \font_typescripts_use_one[#fontshape][#fontsize][\s!size]%
   \font_typefaces_defining_stop}

\unexpanded\def\setuptypeface% [class] [settings]
  {\dodoubleempty\font_typefaces_setup}

\unexpanded\def\switchtotypeface% [class] [settings]
  {\dodoubleempty\font_typefaces_switch}

\def\font_typefaces_setup[#class][#settings]%
  {\setcurrentfontclass{#class}%
   \let\globalfontclass\fontclass
   \ifsecondargument
     \setupbodyfont[#settings]%
   \else\ifx\fontclass\empty
     \setupbodyfont[\s!rm]%
   \else\ifcsname\??typescriptdefaultstyles\fontclass\endcsname
    %\setupbodyfont[\csname\??typescriptdefaultstyles\fontclass\endcsname]%
     \expandafter\setupbodyfont\expandafter[\lastnamedcs]%
   \else
     \setupbodyfont[\s!rm]%
   \fi \fi \fi
   \ifmmode\mr\else\tf\fi} % needed ?

\def\font_typefaces_switch[#class][#settings]%
  {\setcurrentfontclass{#class}%
   \let\globalfontclass\globalfontclass
   \ifsecondargument
     \switchtobodyfont[#settings]%
   \else\ifx\fontclass\empty
     \switchtobodyfont[\s!rm]%
   \else\ifcsname\??typescriptdefaultstyles\fontclass\endcsname
    %\switchtobodyfont[\csname\??typescriptdefaultstyles\fontclass\endcsname]%
     \expandafter\switchtobodyfont\expandafter[\lastnamedcs]%
   \else
     \switchtobodyfont[\s!rm]%
   \fi \fi \fi
   \ifmmode\mr\else\tf\fi} % needed ?

%D For Taco:
%D
%D \starttyping
%D \inherittypeface[palatino][rm][postscript]
%D \inherittypeface[palatino][rm][\fontclass]
%D \inherittypeface[palatino][rm] % == \fontclass
%D \inherittypeface[palatino] % == [rm,ss,tt,mm]
%D \stoptyping

\unexpanded\def\inherittypeface
  {\dotripleempty\font_typescripts_inherit_indeed}

\def\font_typescripts_inherit_indeed[#name][#styles][#parentclass]%
  {\doifelsenothing{#styles}
     {\font_typescripts_inherit_indeed[#name][\s!rm,\s!ss,\s!tt,\s!mm][\fontclass]}
     {\doifnot{#name}{#parentclass}
        {\glet\font_typescripts_inherit_check\font_typescripts_inherit_check_indeed
         \def\font_typescripts_inherit_check_step#style{\setevalue{\??typescriptinheritances#name:#style}{#parentclass}}%
         \processcommalist[#styles]\font_typescripts_inherit_check_step}}}

\let\font_typescripts_inherit_check_step\relax

%D This hooks into the font mechanism with:

\def\font_typescripts_inherit_check_indeed#name% called often
  {\ifcsname\??typescriptinheritances\fontclass:#name\endcsname
    %\expandafter\let\expandafter\fontclass\csname\??typescriptinheritances\fontclass:#name\endcsname
     \expandafter\let\expandafter\fontclass\lastnamedcs
   \fi}

\let\font_typescripts_inherit_check\gobbleoneargument

% not yet:
%
% \def\font_helpers_check_relative_font_id
%   {\ifcsname\??typescriptrelatives\fontclass\endcsname
%      \expandafter\let\expandafter\relativefontid\csname\??typescriptrelatives\fontclass\endcsname
%    \else
%      \expandafter\normalxdef\csname\??typescriptrelatives\fontclass\endcsname{\the\lastfontid}%
%      \let\relativefontid\minusone
%    \fi}

\def\v_font_string_d % default fontstyle (expands to \s!Serif in font-ini)
  {\expandafter\ifx\csname\??typescriptdefaultstyles\fontclass\endcsname\s!rm \s!Serif \else
   \expandafter\ifx\csname\??typescriptdefaultstyles\fontclass\endcsname\s!ss \s!Sans  \else
   \expandafter\ifx\csname\??typescriptdefaultstyles\fontclass\endcsname\s!tt \s!Mono  \else
                                                                              \s!Serif \fi\fi\fi}

\unexpanded\def\font_helpers_set_fontstyle_of_fontclass
  {\ifx\fontclass\empty
     \let\fontstyle\s!rm
   \else\ifcsname\??typescriptdefaultstyles\fontclass\endcsname
    %\edef\fontstyle{\csname\??typescriptdefaultstyles\fontclass\endcsname}%
     \edef\fontstyle{\lastnamedcs}%
   \else
     \let\fontstyle\s!rm
   \fi\fi}

\protect \endinput