summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/optex/base/fonts-opmac.opm
blob: 3ae2f0c5e1cc289600c8d5f4c5443b46eb479412 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
%% This is part of the OpTeX project, see http://petr.olsak.net/optex

\_codedecl \typosize {Font managing macros from OPmac <2021-03-10>} % loaded 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 \_bf \_it \_bi \_rm \_fi % load all basic variants of the family
   \_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{\_ifdim\_lastskip>\_zo
   \_skip0=\_lastskip \_unskip\_italcorr \_hskip\_skip0 \_else\_italcorr \_fi}
\_def\_afteritcorr{\_futurelet\_next\_afteritcorrA}
\_def\_afteritcorrA{\_ifx\_next.\_else\_ifx\_next,\_else \_italcorr \_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 {\_tryloadbf \_tenbf \_inmath{\_rmvariables \_rmdigits}}%
          \_protected\_def\it {\_tryloadbi \_tenbi \_inmath{\_itvariables}}%
   \_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:
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