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%% This is part of the OpTeX project, see http://petr.olsak.net/optex
\_codedecl \typosize {Font managing macros from OPmac <2022-02-22>} % preloaded in format
\_doc -----------------------------
\`\typosize` `[<font-size>/<baselineskip>]` sets given parameters.
It sets text font size by the \^`\setfontsize` macro and math font sizes
by setting internal macros \^`\_sizemtext`, \^`\_sizemscript` and
\^`\_sizemsscript`. It uses common concept font sizes: 100\,\%,
70\,\% and 50\,\%.
The \^`\_setmainvalues` sets the parameters as main values when
the `\_typosize` is called first.
\_cod -----------------------------
\_protected\_def \_typosize [#1/#2]{%
\_textfontsize{#1}\_mathfontsize{#1}\_setbaselineskip{#2}%
\_setmainvalues \_ignorespaces
}
\_protected\_def \_textfontsize #1{\_if$#1$\_else \_setfontsize{at#1\_ptunit}\_fi}
\_def \_mathfontsize #1{\_if$#1$\_else
\_tmpdim=#1\_ptunit
\_edef\_sizemtext{\_ea\_ignorept \_the\_tmpdim \_ptmunit}%
\_tmpdim=0.7\_tmpdim
\_edef\_sizemscript{\_ea\_ignorept \_the\_tmpdim \_ptmunit}%
\_tmpdim=#1\_ptunit \_tmpdim=0.5\_tmpdim
\_edef\_sizemsscript{\_ea\_ignorept \_the\_tmpdim \_ptmunit}%
\_fi
}
\_public \typosize ;
\_doc -----------------------------
\`\typoscale` `[<font-factor>/<baseline-factor>]` scales
font size and baselineskip by given factors in respect to current values.
It calculates the \^`\typosize` parameters and runs the \^`\typosize`.
\_cod -----------------------------
\_protected\_def \_typoscale [#1/#2]{%
\_ifx$#1$\_def\_tmp{[/}\_else
\_settmpdim{#1}\_optsize
\_edef\_tmp{[\_ea\_ignorept\_the\_tmpdim/}\_fi
\_ifx$#2$\_edef\_tmp{\_tmp]}\_else
\_settmpdim{#2}\_baselineskip
\_edef\_tmp{\_tmp \_ea\_ignorept\_the\_tmpdim]}\_fi
\_ea\_typosize\_tmp
}
\_def\_settmpdim#1#2{%
\_tmpdim=#1pt \_divide\_tmpdim by1000
\_tmpdim=\_ea\_ignorept \_the#2\_tmpdim
}
\_public \typoscale ;
\_doc -----------------------------
\`\_setbaselineskip` `{<baselineskip>}` sets new `\baselineskip` and
more values of registers which are dependent on the `<baselineskip>`
including the \^`\strutbox`.
\_cod -----------------------------
\_def \_setbaselineskip #1{\_if$#1$\_else
\_tmpdim=#1\_ptunit
\_baselineskip=\_tmpdim \_relax
\_bigskipamount=\_tmpdim plus.33333\_tmpdim minus.33333\_tmpdim
\_medskipamount=.5\_tmpdim plus.16666\_tmpdim minus.16666\_tmpdim
\_smallskipamount=.25\_tmpdim plus.08333\_tmpdim minus.08333\_tmpdim
\_normalbaselineskip=\_tmpdim
\_jot=.25\_tmpdim
\_maxdepth=.33333\_tmpdim
\_setbox\_strutbox=\_hbox{\_vrule height.709\_tmpdim depth.291\_tmpdim width0pt}%
\_fi
}
\_doc -----------------------------
\`\_setmainvalues` sets the current font size and `\baselineskip`
values to the \`\mainfosize` and \hbox{\`\mainbaselineskip`} registers
and loads fonts at given sizes.
It redefines itself as \`\_setmainvaluesL`
to set the main values only first. The \^`\_setmainvaluesL` does only
fonts loading.
\nl
\`\scalemain` returns to these values if they were set. Else they are set
to 10/12\,pt.
\nl
\`\mfontsrule` gives the rule how math fonts are loaded when \^`\typosize`
or \^`\typoscale` are used. The value of \^`\mfontsrule` can be:
\begitems
* 0: no math fonts are loaded. User must use \^`\normalmath` or \^`\boldmath` explicitly.
* 1: `\_normalmath` is run if \^`\typosize`/\^`\typoscale` are used
first or they are run at outer group level. No
`\everymath`/`\everydisplay` are set in this case. If
\^`\typosize`/\^`\typoscale` are run repeatedly in a group then `\_normalmath` is
run only when math formula occurs. This is done using
`\everymath`/`\everydisplay` and \^`\_setmathfonts`.
\^`\mfontsrule=1` is default.
* 2: `\_normalmath` is run whenever \^`\typosize`/\^`\typoscale` are used.
`\everymath`/`\everydisplay` registers are untouched.
\enditems
\_cod -----------------------------
\_newskip \_mainbaselineskip \_mainbaselineskip=0pt \_relax
\_newdimen \_mainfosize \_mainfosize=0pt
\_newcount \_mfontsrule \_mfontsrule=1
\_def\_setmainvalues {%
\_mainbaselineskip=\_baselineskip
\_mainfosize=\_optsize
\_topskip=\_mainfosize \_splittopskip=\_topskip
\_ifmmode \_else \_rm \_fi % load and initialize \rm variant
\_ifnum \_mfontsrule>0 \_normalmath \_fi % load math fonts first
\_let \_setmainvalues =\_setmainvaluesL
}
\_def\_setmainvaluesL {\_relax \_ifmmode \_else \_rm \_fi % load text font
\_ifcase \_mfontsrule % load math fonts
\_or \_ifnum\_currentgrouplevel=0 \_normalmath
\_else \_everymath={\_setmathfonts}\_everydisplay={\_normalmath}%
\_let\_runboldmath=\_relax \_fi
\_or \_normalmath \_fi}
\_def\_scalemain {%
\_ifdim \_mainfosize=\_zo
\_mainfosize=10pt \_mainbaselineskip=12pt
\_let \_setmainvalues=\_setmainvaluesL
\_fi
\_optsize=\_mainfosize \_baselineskip=\_mainbaselineskip
}
\_public \scalemain \mainfosize \mainbaselineskip \mfontsrule ;
\_doc -----------------------------
Suppose following example:
`{\typosize[13/15] Let $M$ be a subset of $R$ and $x\in M$...}`
If \^`\mfontsrule=1` then \^`\typosize` does not load math fonts
immediatelly but at the first math formula. It is done by `\everymath`
register, but the contents of this register is processed inside the math
group. If we do `\everymath={\_normalmath}` then this complicated macro
will be processed three times in your example above. We want only one
pocessing, so we do `\everymath={`\`\_setmathfonts``}` and
this macro closes math mode first, loads fonts and opens math mode again.
\_cod -----------------------------
\_def\_setmathfonts{$\_normalmath\_everymath{}\_everydisplay{}$}
\_doc -----------------------------
\`\thefontsize` `[<size>]` and \`\thefontscale` `[<factor>]`
do modification of the size of the current font. They are implemented by the
\^`\newcurrfontsize` macro.
\_cod -----------------------------
\_protected\_def\_thefontsize[#1]{\_if$#1$\_else
\_tmpdim=#1\_ptunit
\_newcurrfontsize{at\_tmpdim}%
\_fi
\_ignorespaces
}
\_protected\_def\_thefontscale[#1]{\_ifx$#1$\_else
\_tmpdim=#1pt \_divide\_tmpdim by1000
\_tmpdim=\_ea\_ea\_ea\_ignorept \_pdffontsize\_font \_tmpdim
\_newcurrfontsize{at\_tmpdim}%
\_fi
\_ignorespaces
}
\_public \thefontsize \thefontscale ;
\_doc -----------------------------
\`\em` keeps the weight of the current variant and switches
roman $\leftrightarrow$ italic. It adds the italic correction by
the \`\_additcorr` and \`\_afteritcorr` macros. The second does not
add italic correction if the next character is dot or comma.
\_cod -----------------------------
\_protected\_def\_em {%
\_ea\_ifx \_the\_font \_tenit \_additcorr \_rm \_else
\_ea\_ifx \_the\_font \_tenbf \_bi\_aftergroup\_afteritcorr\_else
\_ea\_ifx \_the\_font \_tenbi \_additcorr \_bf \_else
\_it \_aftergroup\_afteritcorr\_fi\_fi\_fi
}
\_def\_additcorr{\_ifhmode \_ifdim\_lastskip>\_zo
\_skip0=\_lastskip \_unskip \_additcorrA \_hskip\_skip0 \_else \_additcorrA \_fi\_fi}
\_def\_additcorrA{\_ifnum\_lastpenalty=\_zo \_italcorr \_else
\_ea\_unpenalty \_ea\_italcorr \_ea\_penalty \_the\_lastpenalty \_relax \_fi}
\_def\_afteritcorr{\_futurelet\_next\_afteritcorrA}
\_def\_afteritcorrA{\_ifhmode \_ifx\_next.\_else\_ifx\_next,\_else \_italcorr \_fi\_fi\_fi}
\_let\_italcorr=\/
\_doc -----------------------------
The \`\boldify` macro does `\let\rm\bf`, `\let\it\bi` and
`\let\normalmath=\boldmath`. All following text will be in bold.
If should be used after \^`\typosize` or \^`\typoscale` macros.\nl
The internal \`\_runboldmath` macro runs `\_boldmath` immediatelly
if no delay of the math font loading is set by \^`\_setmainvaluesL`.\nl
The `\rm`, `\it` in math mode must keep its original meaning.
\_cod -----------------------------
\_protected\_def \_boldify {%
\_let \_setmainvalues=\_setmainvaluesL
\_let\it =\_bi \_let\rm =\_bf \_let\_normalmath=\_boldmath \_bf
\_runboldmath
\_ifx\_ncharrmA\_undefined \_protected\_addto\rm{\_fam0 }\_protected\_addto\it{\_fam1 }%
\_else \_protected\_def\rm {\_fmodbf \_fontsel \_marm}%
\_protected\_def\it {\_fmodbi \_fontsel \_mait}%
\_fi
}
\_def\_runboldmath{\_boldmath}
\_public \em \boldify ;
\_doc -----------------------------
We need to use a font selector for default pagination. Because we don't
know what default font size will be selected by the user, we use this
\`\_rmfixed` macro. It sets the `\rm` font from the default font size
(declared by first \^`\typosize` command and redefines itself be only
the font switch for the next pages.
\_cod -----------------------------
\_def \_rmfixed {% used in default \footline
{\_ifdim\_mainfosize=0pt \_mainfosize=10pt \_fi
\_fontdef\_tenrm{\_setfontsize{at\mainfosize}\_resetmod\_rm}%
\_global\_let\_rmfixed=\_tenrm}% next use will be font switch only
\_rmfixed
}
\_let \rmfixed = \_tenrm % user can redefine it
\_endcode % -------------------------------------
History:
2024-01-25 \em: \_additcorr reimplemented to be more robust
2022-02-22 \_setmainvalues: only \rm initialized
2021-03-10 \boldify corrected
2021-03-09 \mfontsrule and \_setmathfonts introduced
2020-12-12 \_rmfixed fixed
2020-04-28 \boldify: removed \let\_rm=\_bf
2020-04-14 \_setmainvaluesL: \_ifmmode test added
2020-03-27 \_setmainvalues: \_splittopskip=\_topskip added
|
