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%% This is part of OpTeX project, see http://petr.olsak.net/optex
\_codedecl \table {Basic macros for OpTeX <2020-03-13>} % preloaded in format
\_doc -----------------------------
The result of `\table` is inserted into `\_tablebox`. You can change
default value if you want `\let\_tablebox=\vtop` or `\let\_tablebox=\relax`.
\_cod -----------------------------
\_let\_tablebox=\_vbox
\_doc -----------------------------
Categories )for example of `|` character) have to be normal when reading
`\table` parameters.
\_cod -----------------------------
\_def\_table{\_tablebox\_bgroup \_catcodetable\_optexcatcodes \_tableA}
\_public \table ;
\_doc -----------------------------
The `\_tablinspace` is implemented by enlarging given `\tabstrut`
by desired dimension (height and depth too) and by setting
`\_lineskip=-2\_tablinspace`. So, normal table rows where no `\hrule` is
between them have normal baseline distance.
\_cod -----------------------------
\_def\_tableA#1{%
\_the\_thistable \_global\_thistable={}%
\_ea\_ifx\_ea^\_the\_tabstrut^\_setbox\_tstrutbox=\_null
\_else \_setbox\_tstrutbox=\_hbox{\_the\_tabstrut}%
\_setbox\_tstrutbox=\_hbox{\_vrule width0pt
height\_dimexpr\_ht\_tstrutbox+\_tablinespace
depth\_dimexpr\_dp\_tstrutbox+\_tablinespace}%
\_offinterlineskip
\_lineskip=-2\_tablinespace
\_fi
\_colnum=0 \_def\_tmpa{}\_tabdata={}\_scantabdata#1\_relax
\_the\_everytable \_tableB
}
\_def\_tableB#1{\_halign\_ea{\_the\_tabdata\_cr#1\_crcr}\_egroup}
\_newbox\_tstrutbox % strut used in table rows
\_newtoks\_tabdata % the \halign declaration line
\_newcount\_colnum % number of columns
\_doc -----------------------------
The `\_scantabdata` converts `\table` <declaration> to `\halign` <declaration>.
The result is stored into `\_tbdata` tokens list. For example, the `\_scandata` creates
following result when <declaration>=`|cr||cl|`.
\begtt
tabdata: \_vrule\_the\_tabiteml\_hfil#\_unsskip\_hfil\_the\_tabitemr\_tabstrutA
&\_the\_tabiteml\_hfil#\_unsskip\_the\_tabitemr \_vrule\_kern\_vvkern\_vrule\_tabstrutA
&\_the\_tabiteml\_hfil#\_unsskip\_hfil\_the\_tabitemr\_tabstrutA
&\_the\_tabiteml#\_unsskip\_hfil\_the\_tabitemr\_vrule\_tabstrutA
ddlinedata: &\_dditem &\_dditem\_vvitem &\_dditem &\_dditem
\endtt
The second result in `\_ddlinedata` macro is a teplate of one row of the table
used by `\crli` macro.
\_cod -----------------------------
\_def\_scantabdata#1{\_let\_next=\_scantabdata
\_ifx\_relax#1\_let\_next=\_relax
\_else\_ifx|#1\_addtabvrule
\_else\_ifx(#1\_def\_next{\_scantabdataE}%
\_else\_isinlist{123456789}#1\_iftrue \_def\_next{\_scantabdataC#1}%
\_else \_ea\_ifx\_csname _tabdeclare#1\_endcsname \_relax
\_ea\_ifx\_csname _paramtabdeclare#1\_endcsname \_relax
\_opwarning{tab-declarator "#1" unknown, ignored}%
\_else
\_def\_next{\_ea\_scantabdataB\_csname _paramtabdeclare#1\_endcsname}\_fi
\_else \_def\_next{\_ea\_scantabdataA\_csname _tabdeclare#1\_endcsname}%
\_fi\_fi\_fi\_fi\_fi \_next
}
\_def\_scantabdataA#1{\_addtabitem \_ea\_addtabdata\_ea{#1\_tabstrutA}\_scantabdata}
\_def\_scantabdataB#1#2{\_addtabitem\_ea\_addtabdata\_ea{#1{#2}\_tabstrutA}\_scantabdata}
\_def\_scantabdataC {\_def\_tmpb{}\_afterassignment\_scantabdataD \_tmpnum=}
\_def\_scantabdataD#1{\_loop \_ifnum\_tmpnum>0 \_advance\_tmpnum by-1 \_addto\_tmpb{#1}\_repeat
\_ea\_scantabdata\_tmpb}
\_def\_scantabdataE#1){\_addtabdata{#1}\_scantabdata}
\_def\_addtabitem{\_ifnum\_colnum>0 \_addtabdata{&}\_addto\_ddlinedata{&\_dditem}\_fi
\_advance\_colnum by1 \_let\_tmpa=\_relax}
\_def\_addtabdata#1{\_toksapp\_tabdata{#1}}
\_def\_addtabvrule{%
\_ifx\_tmpa\_vrule \_addtabdata{\_kern\_vvkern}%
\_ifnum\_colnum=0 \_addto\_vvleft{\_vvitem}\_else\_addto\_ddlinedata{\_vvitem}\_fi
\_else \_ifnum\_colnum=0 \_addto\_vvleft{\_vvitemA}\_else\_addto\_ddlinedata{\_vvitemA}\_fi\_fi
\_let\_tmpa=\_vrule \_addtabdata{\_vrule}%
}
\_def\_tabstrutA{\_copy\_tstrutbox}
\_def\_vvleft{}
\_def\_ddlinedata{}
\_doc -----------------------------
The default \"declaration letters" `c`, `l`, `r` and `p` are defined here.
You can define more such leeters by `\def\_tabdeclare<letter>{...}` for a non-parametric
letter and by `\def\_paramtabdeclare<letter>{...}` for a letter with a parameter.
The double hash `##` must be in the definition, it is replaced by a real table item data.
\_cod -----------------------------
\_def\_tabdeclarec{\_the\_tabiteml\_hfil##\_unsskip\_hfil\_the\_tabitemr}
\_def\_tabdeclarel{\_the\_tabiteml##\_unsskip\_hfil\_the\_tabitemr}
\_def\_tabdeclarer{\_the\_tabiteml\_hfil##\_unsskip\_the\_tabitemr}
\_def\_paramtabdeclarep#1{\_the\_tabiteml
\_vtop{\_hsize=#1\_relax \_baselineskip=\_normalbaselineskip
\_lineskiplimit=0pt \_noindent##\_unsskip \_lower\_dp\_tstrutbox\hbox{}}\_the\_tabitemr}
\_doc -----------------------------
User puts optional spaces around the table item typically, i.e. he/she writes
`& text &` instead `&text&`. The left space is ignored by internal \TeX/ algorithm but
the right space must be removed by macros. This is a reason why we reccomend to
use `\_unsskip` after each `##` in your definition of \"declaration letters".
This macro isn't only the primitive `\unskip` because we allow usage of plain \TeX/
`\hideskip` macro: `&\hideskip text\hideskip&`.
\_cod -----------------------------
\_def\_unsskip{\_ifdim\_lastskip>0pt \_unskip\_fi}
\_doc -----------------------------
The family of `\_cr*` macros and `\tskip <dimen>` is implemented here.
The `\_zerotabrule` is used in order to suppress the negative `\lineskip`
declared by `\tablinespace`.
\_cod -----------------------------
\_def\_crl{\_crcr\_noalign{\_hrule}}
\_def\_crll{\_crcr\_noalign{\_hrule\_kern\_hhkern\_hrule}}
\_def\_zerotabrule {\_noalign{\_hrule height0pt width0pt depth0pt}}
\_def\_crli{\_crcr \_zerotabrule \_omit
\_gdef\_dditem{\_omit\_tablinefil}\_gdef\_vvitem{\_kern\_vvkern\_vrule}\_gdef\_vvitemA{\_vrule}%
\_vvleft\_tablinefil\_ddlinedata\_crcr \_zerotabrule}
\_def\_crlli{\_crli\_noalign{\_kern\_hhkern}\_crli}
\_def\_tablinefil{\_leaders\_hrule\_hfil}
\_def\_crlp#1{\_crcr \_zerotabrule \_noalign{\_kern-\_drulewidth}%
\_omit \_xdef\_crlplist{#1}\_xdef\_crlplist{,\_expandafter}\_expandafter\_crlpA\_crlplist,\_end,%
\_global\_tmpnum=0 \_gdef\_dditem{\_omit\_crlpD}%
\_gdef\_vvitem{\_kern\_vvkern\_kern\_drulewidth}\_gdef\_vvitemA{\_kern\_drulewidth}%
\_vvleft\_crlpD\_ddlinedata \_global\_tmpnum=0 \_crcr \_zerotabrule}
\_def\_crlpA#1,{\_ifx\_end#1\_else \_crlpB#1-\_end,\_expandafter\_crlpA\_fi}
\_def\_crlpB#1#2-#3,{\_ifx\_end#3\_xdef\_crlplist{\_crlplist#1#2,}\_else\_crlpC#1#2-#3,\_fi}
\_def\_crlpC#1-#2-#3,{\_tmpnum=#1\_relax
\_loop \_xdef\_crlplist{\_crlplist\_the\_tmpnum,}\_ifnum\_tmpnum<#2\_advance\_tmpnum by1 \_repeat}
\_def\_crlpD{\_global\_advance\_tmpnum by1
\_edef\_tmpa{\_noexpand\_isinlist\_noexpand\_crlplist{,\_the\_tmpnum,}}%
\_tmpa\_iftrue \_kern-\_drulewidth \_tablinefil \_kern-\_drulewidth\_else\_hfil \_fi}
\_def\_tskip{\_afterassignment\_tskipA \_tmpdim}
\_def\_tskipA{\_gdef\_dditem{}\_gdef\_vvitem{}\_gdef\_vvitemA{}\_gdef\_tabstrutA{}%
\_vbox to\_tmpdim{}\_ddlinedata \_crcr
\_zerotabrule \_noalign{\_gdef\_tabstrutA{\_copy\_tstrutbox}}}
\_public \crl \crll \crli \crlli \crlp \tskip ;
\_doc -----------------------------
The `\mspan[<declaration>]{<text>}` macro generates similar `\omit\span\omit\span`
sequence as plain \TeX/ macro `\multispan`. Moreover, it uses `\_scantabdata` to
convert <declaration> from `\table` syntax to `\halign` syntax.
\_cod -----------------------------
\_def\_mspan{\_omit \_tabdata={\_tabstrutA}\_let\_tmpa=\_relax \_afterassignment\_mspanA \_mscount=}
\_def\_mspanA[#1]#2{\_loop \_ifnum\_mscount>1 \_cs{_span}\_omit \_advance\_mscount-1 \_repeat
\_colnum=0 \_def\_tmpa{}\_tabdata={}\_scantabdata#1\_relax
\_setbox0=\_vbox{\_halign\_expandafter{\_the\_tabdata\_cr#2\_crcr}\_global\_setbox8=\_lastbox}%
\_setbox0=\_hbox{\_unhbox8 \_unskip \_global\_setbox8=\_lastbox}%
\_unhbox8 \_ignorespaces}
\_public \mspan ;
\_doc -----------------------------
The parameters of primitive `\vrule` and `\hrule` keeps the rule \"last wins".
If we re-define `\hrule` to `\_orihrule height1pt` then each usage
of redefined `\hrule` uses `1pt` height if this parameter isn't
overwriten by another following `height` parameter. This principle is used for
settings another default rule thickness than 0.4pt.
\_cod -----------------------------
\_newdimen\_drulewidth \_drulewidth=0.4pt
\_let\_orihrule=\_hrule \_let\_orivrule=\_vrule
\_def\_rulewidth{\_afterassignment\_rulewidthA \_drulewidth}
\_def\_rulewidthA{\_edef\_hrule{\_orihrule height\_drulewidth}%
\_edef\_vrule{\_orivrule width\_drulewidth}%
\_let\_rulewidth=\_drulewidth
\_public \vrule \hrule \rulewidth;}
\_public \rulewidth ;
\_doc -----------------------------
The `\frame` uses \"`\vbox` in `\vtop`" trick in order to keep the
baseline of the internal text at the same level as outer baseline.
User can write `\frame{abcxyz}` in normal paragraph line, for example
and gets the expected result: \frame{abcxyz}.
The internal margins are set by `\vvkern` and `\hhkern` parameters.
\_cod -----------------------------
\_long\_def\_frame#1{%
\_hbox{\_vrule\_vtop{\_vbox{\_hrule\_kern\_vvkern
\_hbox{\_kern\_hhkern\_relax#1\_kern\_hhkern}%
}\_kern\_vvkern\_hrule}\_vrule}}
\_public \frame ;
\_endcode % -------------------------------------
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