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%% This is part of the OpTeX project, see http://petr.olsak.net/optex
\_codedecl \uv {Miscenaleous <2020-08-02>} % preloaded in format
\_doc ----------------------------
\`\useOpTeX` and \`\useoptex` are declared as `\relax`.
\_cod ----------------------------
\_let \useOpTeX = \_relax \_let \useoptex = \_relax
\_doc ----------------------------
The \`\lastpage` and \`\totalpages` get the information from the
\^`\_currpage`. The \^`\_Xpage` from `.ref` file sets the \^`\_currpage`.
\_cod ----------------------------
\_def\_totalpages {\_openref\_ea\_ignoresecond\_currpage}
\_def\_lastpage {\_openref\_ea\_usesecond\_currpage}
\_def\_currpage {{0}{?}}
\_public \lastpage \totalpages ;
\_doc ----------------------------
We need \`\uv`, \`\clqq`, \`\crqq`, \`\flqq`, \`\frqq`, \`\uslang`, \`\ehyph`
\`\chyph`, \`\shyph`, for backward compatibility with \csplain.
Codes are set according to Unicode because we are using Czech only in Unicode
when \LuaTeX/ is used.
\_cod ----------------------------
% for compatibility with csplain:
\_chardef\clqq=8222 \_chardef\crqq=8220
\_chardef\flqq=171 \_chardef\frqq=187
\_chardef\promile=8240
\_def\uv#1{\clqq#1\crqq}
\_let\uslang=\enlang \_let\ehyph=\enlang
\_let\chyph=\cslang \_let\shyph=\sklang
\_let\csUnicode=\csPatt \_let\czUnicode=\csPatt \_let\skUnicode=\skPatt
\_doc ----------------------------
The \`\letfont` was used in \csplain/ instead of `\fontlet`.
\_cod ----------------------------
\_let \letfont = \_fontlet
\_doc ----------------------------
Non-breaking space in Unicode.
\_cod ----------------------------
\let ^^a0=~
\_doc ----------------------------
TikZ needs these funny control sequences.
\_cod ----------------------------
\_ea\_toksdef \_csname toks@\_endcsname=0
\_ea\_let \_csname voidb@x\_endcsname=\_voidbox
\_doc ----------------------------
We don't want to read `opmac.tex` unless `\input opmac` is specified.
\_cod ----------------------------
\_def\OPmacversion{OpTeX}
\_doc ----------------------------
We allow empty lines in math formulae. It is more comfortable.
\_cod ----------------------------
\_suppressmathparerror = 1
\_doc ----------------------------
Lorem ipsum can be printed by \`\lipsum``[<range>]` or \`\lorem``[<range>]`,
for example `\lipsum[3]` or `\lipsum[112-121]`, max=150.
First usage of `\lipsum` reads the \LaTeX/ file `lipsum.ltd.tex`
by \`\_lipsumload`
and prints the selected paragraph(s). Next usages of `\lipsum`
prints the selected paragraph(s) from memory. This second and more
usages of `\lipsum` are fully expandable. If you want to have all
printings of `\lipsum` expandable, use dummy `\lipsum[0]` first.
`\lipsum` adds `\_par` after each printed paragraph. If you don't need
such `\_par` here, use \`\lipsumtext``[<number>]`.
This macro prints only one selected paragraph <number> and does not add `\_par`.
\_cod ----------------------------
\_def\_lipsumtext[#1]{\_lipsumload\_cs{_lip:#1}}
\_def\_lipsum[#1]{\_lipsumA #1\_empty-\_empty\_end}
\_def\_lipsumA #1-#2\_empty#3\_end{%
\_fornum #1..\_ifx^#2^#1\_else#2\_fi \_do {\_lipsumtext[##1]\_par}}
\_def\_lipsumload{{%
\_setbox0=\_vbox{\_tmpnum=0 % vertical mode during \input lipsum.ltd.tex
\_def\ProvidesFile##1[##2]{}%
\_def\SetLipsumLanguage##1{}%
\_def\NewLipsumPar{\_incr\_tmpnum \_sxdef{_lip:\_the\_tmpnum}}%
\_opinput {lipsum.ltd.tex}%
\_global\_let\_lipsumload=\_empty
}}}
\_public \lipsum \lipsumtext ;
\_let \lorem=\lipsum
\_doc -----------------------------
Lua\TeX/ version 1.14 and newer provides `\partokenname` which allows to
specify something different than `\par` at empty lines. We set `\_par`
(see bellow) in \OpTeX/ version 1.04+ and newer. Some macros were rewritten
due to this change. And we copy old versions of these changed macros here
in order to allow to use older Lua\TeX/ versions where `\partokenname` is
not provided.\nl
Note that your macros where a parameter is separated by the empty line
must be changed too. Use `\def\macro #1\_par{...}` instead
`\def\macro #1\par{...}`.
\_cod -----------------------------
\_ifx\_partokenname\_undefined % LuaTeX 1.13 or older:
\_def\_begmulti #1 {\_par\_bgroup\_wipeepar\_multiskip\_penalty0 \_def\_Ncols{#1}
\_setbox6=\_vbox\_bgroup\_bgroup \_let\_setxhsize=\_relax \_penalty-99
\_advance\_hsize by\_colsep
\_divide\_hsize by\_Ncols \_advance\_hsize by-\_colsep
\_mullines=0
\_def\par{\_ifhmode\_endgraf\_global\_advance\_mullines by\_prevgraf\_fi}%
}
\_def\_incaption {\_bgroup
\_ifcsname _\_tmpa num\_endcsname \_ea\_incr \_csname _\_tmpa num\_endcsname
\_else \_opwarning{Unknown caption /\_tmpa}\_fi
\_edef\_thecapnum {\_csname _the\_tmpa num\_endcsname}%
\_edef\_thecaptitle{\_mtext{\_tmpa}}%
\_ea\_the \_csname _everycaption\_tmpa\_endcsname
\_def\_par{\_nbpar\_egroup}\_let\par=\_par
\_cs{_printcaption\_tmpa}%
}
\_def\_boxlines{%
\_def\_boxlinesE{\_ifhmode\_egroup\_empty\_fi}%
\_def\_nl{\_boxlinesE}%
\_bgroup \_lccode`\~=`\^^M\_lowercase{\_egroup\_let~}\_boxlinesE
\_everypar{\_setbox0=\_lastbox\_endgraf
\_hbox\_bgroup \_catcode`\^^M=13 \_let\par=\_nl \_aftergroup\_boxlinesC}%
}
\_def\_letter{
\_def\_address{\_vtop\_bgroup\_boxlines \_parskip=0pt \_let\par=\_egroup}
\_def\_subject{{\_bf \_mtext{subj}: }}
\_public \address \subject ;
\_typosize[11/14]
\_vsize=\_dimexpr \_topskip + 49\_baselineskip \_relax % added 2020-03-28
\_parindent=0pt
\_parskip=\_medskipamount
\_nopagenumbers
}
\_def\_printverbline#1{\_putttpenalty \_indent \_printverblinenum \_kern\_ttshift #1\par}
\_public \begmulti \boxlines \letter ;
\_else % LuaTeX 1.14 or newer:
\_doc -----------------------------
We set `\partokenneame` to `\_par` in order to keep the name `\par` in
user name space. I.e. a user can say `\def\par{paragraph}` for example
without crash of processing the document. Se section~\ref[prefixed] for
more details about the name space concept.\nl
Moreover, we set `\partokencontext` to one in order to the `\_par` token
is inserted not only at empty lines, but also at the end of `\vbox`, `\vtop` and
`\vcenter` if horizontal mode is opened here. This differs from default
\TeX/ behavior where horizontal mode is closed in these cases without
inserting par token.\nl
We set \`\_partokenset` to defined value 1 in order to the macro programmer can
easily check these settings in \OpTeX/ format by
`\ifx\_partokenset\undefined ... \else ...\fi`.
\_cod -----------------------------
\_partokenname\_par
\_partokencontext=1
\_let\_partokenset=1
\_fi
\_endcode
2021-08-02 \SetLipsumLanguage added, fix for new lipusm version
2021-01-04 \lipsumtext introduced
2020-05-22 \lipsum uses \fornum (expandable after first usage)
2020-04-02 released
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