summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/luatex/optex/base/sections.opm
blob: 66dc9cd9e089427d77137edc7dfed5ed52fcce7c (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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
%% This is part of the OpTeX project, see http://petr.olsak.net/optex

\_codedecl \chap {Titles, chapters, sections, subsections <2020-03-28>} % preloaded in format

   \_doc ---------------------------
   We are using scaled fonts for titles
   \`\_titfont`, \`\_chapfont`, \`\_secfont` and \`\_seccfont`.
   They are scaled from main fonts size
   of the document, which is declared by first `\typosize[<fo-size>/<b-size>]`
   command.
   \_cod ---------------------------

\_def \_titfont  {\_scalemain\_typoscale[\_magstep4/\_magstep5]\_boldify}
\_def \_chapfont {\_scalemain\_typoscale[\_magstep3/\_magstep3]\_boldify}
\_def \_secfont  {\_scalemain\_typoscale[\_magstep2/\_magstep2]\_boldify}
\_def \_seccfont {\_scalemain\_typoscale[\_magstep1/\_magstep1]\_boldify}

   \_doc ---------------------------
   The \`\tit` macro is defined using \^`\scantoeol` and \`\_printtit`.
   It means that the parameter is
   separated by end of line and inline verbatim is allowed. The same
   principle is used in the \^`\chap`, \^`\sec`, and \^`\secc` macros.
   \_cod ---------------------------

\_def\_printtit #1{\_vglue\_titskip
  {\_leftskip=0pt plus1fill \_rightskip=\_leftskip % centering
   \_titfont \_noindent \_scantextokens{#1}\_par}%
   \_nobreak\_bigskip
}
\_def\_tit{\_scantoeol\_printtit}

\_public \tit ;

   \_doc ---------------------------
   You can re-define \`\_printchap`, \`\_printsec` or \`\_printsecc` macros if
   another design of section titles is needed. These macros get the
   `<title>` text in its parameter. The common recommendations for these macros are:
   \begitems
   * Use \^`\_abovetitle``{<penaltyA>}{<skipA>}` and \^`\_belowtitle``{<skipB>}`
     for inserting vertical material above and below the section title.
     The arguments of these macros are normally used, i.\,e.\ \^`\_abovetitle`
     inserts `<penaltyA><skipA>` and \^`\_belowtitle` inserts `<skipB>`.
     But there is an
     exception: if \^`\_belowtitle``{<skipB>}` is immediately followed by
     \^`\_abovetitle``{<penaltyA>}{<skipA>}` (for example section title is
     immediately followed by subsection title), then only `<skipA>` is generated,
     i.\,e.\ `<skipB><penaltyA><skipA>` is reduced only to `<skipA>`.
     The reason for such behavior: we don't want to duplicate vertical skip
     and we don't want to use the negative penalty in such cases.
     Moreover, \^`\_abovetitle``{<penaltyA>}{<skipA>}` takes previous whatever
     vertical skip (other than from `\_belowtitle`) and generates only
     greater from this pair of skips. It means that `<whatever-skip><penaltyA><skipA>`
     is transformed to `<penaltyA>`max(`<whatever-skip><skipA>`).
     The reason for such behavior: we don't want to
     duplicate vertical skips (from `\_belowlistskip`, for example) above the title.
   * Use \^`\_printrefnum``[<pre>@<post>]` in horizontal mode. It prints
     `<pre><ref-num><post>`. The `<ref-num>` is \^`\_thechapnum` or \^`\_thesecnum`
     or \^`\_theseccnum` depending on what type o title is processed.
     If \^`\nonum` prefix is used then \^`\_printrefnum` prints nothing.
     The macro \^`\_printrefnum` does more work: it creates destination of hyperlinks
     (if \^`\hyperlinks``{}{}` is used) and saves references from the label (if
     \^`\label``[<label>]` precedes) and saves references for the table of contents
     (if \^`\maketoc` is used).
   * Use \^`\nbpar` for closing the paragraph for printing title. This
     command inserts `\_nobreak` between each line of such paragraph, so
     the title cannot be broken into more pages.
   * You can use \^`\_firstnoindent` in order to the first paragraph after
     the title is not indented.
   \enditems
   \_cod ---------------------------

\_def\_printchap #1{\_vfill\_supereject
   \_vglue\_medskipamount % shifted by topkip+\medskipamount
   {\_chapfont \_noindent \_mtext{chap} \_printrefnum[@]\_par
    \_nobreak\_smallskip
    \_noindent \_raggedright #1\_nbpar}\_mark{}%
   \_nobreak \_belowtitle{\_bigskip}%
   \_firstnoindent
}
\_def\_printsec#1{\_par
   \_abovetitle{\_penalty-400}\_bigskip
   {\_secfont \_noindent \_raggedright \_printrefnum[@\_quad]#1\_nbpar}\_insertmark{#1}%
   \_nobreak \_belowtitle{\_medskip}%
   \_firstnoindent
}
\_def\_printsecc#1{\_par
   \_abovetitle{\_penalty-200}{\_medskip\_smallskip}
   {\_seccfont \_noindent \_raggedright \_printrefnum[@\_quad]#1\_nbpar}%
   \_nobreak \_belowtitle{\_medskip}%
   \_firstnoindent
}

   \_doc --------------------------
   The \`\_sectionlevel` is the level of the printed section:
   \begitems
   * `\_sectionlevel=0` -- reserved for parts of the book (unused by default)
   * `\_sectionlevel=1` -- chapters (used in `\chap`)
   * `\_sectionlevel=2` -- sections (used in `\sec`)
   * `\_sectionlevel=3` -- subsections (used in `\secc`)
   * `\_sectionlevel=4` -- subsubsections (unused by default)
   \enditems
   \_cod --------------------------

\_newcount\_sectionlevel
\_def \_secinfo {\_ifcase \_sectionlevel
   part\_or chap\_or sec\_or secc\_or seccc\_fi
}

   \_doc --------------------------
   The \`\_chapx` initializes counters used in chapters,
   the \`\_secx` initializes counters in sections
   and \`\_seccx` initializes counters in subsections.
   If you have more types of numbered objects in your document then you can
   declare appropriate counters and do `\addto\_chapx{\yourcounter=0 }`
   for example. If you have another concept of numbering objects used in your
   document, you can re-define these macros. All settings here are global
   because it is used by `{\_globaldefs=1 \_chapx}`.

   Default concept: Tables, figures, and display maths are numbered
   from one in each section -- subsections don't reset these counters.
   Footnotes declared by \^`\fnotenumchapters` are numbered in each chapter
   from one.

   The `\_the*` macros
   \`\_thechapnum`, \`\_thesecnum`, \`\_theseccnum`,
   \`\_thetnum`, \`\_thefnum` and \`\_thednum`
   include the format of numbers used when the object
   is printing. If chapter is never used in the document then `\_chapnum=0`
   and \`\_othe``\_chapnum.` expands to empty. Sections have numbers <num> and
   subsections <num>.<num>. On the other hand, if chapter is used in the
   document then `\_chapnum>0` and sections have numbers` <num>.<num>`
   and subsections have numbers `<num>.<num>.<num>`.

   \_cod --------------------------

\_newcount \_chapnum  % chapters
\_newcount \_secnum   % sections
\_newcount \_seccnum  % subsections
\_newcount \_tnum     % table numbers
\_newcount \_fnum     % figure numbers
\_newcount \_dnum     % numbered display maths

\_def \_chapx {\_secx  \_secnum=0  \_lfnotenum=0 }
\_def \_secx  {\_seccx \_seccnum=0 \_tnum=0 \_fnum=0 \_dnum=0 \_resetABCDE }
\_def \_seccx {}

\_def \_thechapnum {\_the\_chapnum}
\_def \_thesecnum  {\_othe\_chapnum.\_the\_secnum}
\_def \_theseccnum {\_othe\_chapnum.\_the\_secnum.\_the\_seccnum}
\_def \_thetnum    {\_othe\_chapnum.\_the\_secnum.\_the\_tnum}
\_def \_thefnum    {\_othe\_chapnum.\_the\_secnum.\_the\_fnum}
\_def \_thednum    {(\_the\_dnum)}

\_def\_othe #1.{\_ifnum#1>0 \_the#1.\_fi}
\_def\_incr #1{\_global\_advance#1by1 }

   \_doc ----------------------------
   The \`\notoc` and \`\nonum` prefixes are implemented by
   internal `\_ifnotoc` and `\_ifnonum`. They are reset
   after each chapter/section/subsection by the \`\_resetnonumnotoc` macro.
   \_cod ----------------------------

\_newifi \_ifnotoc  \_notocfalse  \_def\_notoc {\_global\_notoctrue}
\_newifi \_ifnonum  \_nonumfalse  \_def\_nonum {\_global\_nonumtrue}
\_def \_resetnonumnotoc{\_global\_notocfalse \_global\_nonumfalse}
\_public \notoc \nonum ;

   \_doc ----------------------------
   The \`\chap`, \`\sec`, and \`\secc` macros are implemented here.
   The \`\_inchap`, \`\_insec` and \`\_insecc` macros do the real work,
   First, we read the optional parameter `[<label>]`, if it exists.
   The `\chap`, `\sec` and `\secc` macro reads its parameter using
   \^`\scantoeol`. This causes that they cannot be used inside other macros.
   Use \`\_inchap`, \`\_insec`, and \`\_insecc` macros directly in such case.
   \_cod ----------------------------

\_optdef\_chap[]{\_trylabel \_scantoeol\_inchap}
\_optdef\_sec []{\_trylabel \_scantoeol\_insec}
\_optdef\_secc[]{\_trylabel \_scantoeol\_insecc}
\_def\_trylabel{\_istoksempty\_opt\_iffalse \_label[\_the\_opt]\_fi}

\_def\_inchap #1{\_par \_sectionlevel=1
   \_def \_savedtitle {#1}% saved to .ref file
   \_ifnonum \_else {\_globaldefs=1 \_incr\_chapnum \_chapx}\_fi
   \_edef \_therefnum {\_ifnonum \_space \_else \_thechapnum \_fi}%
   \_printchap{\_scantextokens{#1}}%
   \_resetnonumnotoc
}
\_def\_insec #1{\_par \_sectionlevel=2
   \_def \_savedtitle {#1}% saved to .ref file
   \_ifnonum \_else {\_globaldefs=1 \_incr\_secnum \_secx}\_fi
   \_edef \_therefnum {\_ifnonum \_space \_else \_thesecnum \_fi}%
   \_printsec{\_scantextokens{#1}}%
   \_resetnonumnotoc
}
\_def\_insecc #1{\_par \_sectionlevel=3
   \_def \_savedtitle {#1}% saved to .ref file
   \_ifnonum \_else {\_globaldefs=1 \_incr\_seccnum \_seccx}\_fi
   \_edef \_therefnum {\_ifnonum \_space \_else \_theseccnum \_fi}%
   \_printsecc{\_scantextokens{#1}}%
   \_resetnonumnotoc
}
\_public \chap \sec \secc ;

   \_doc ----------------------------
   The \`\_printrefnum``[<pre>@<post>]` macro is used in `\_print*` macros.
   \nl
   The \`\_wtotoc` `{<level>}{<info>}{<ref-num>}{<title-text>}`
   macro expands its parameters and does \^`\_wref`.

   Note that the `<tite-text>` is `\detokenize`d before `\_wref`, so the
   problem of \"fragile macros" from old \LaTeX/ never occurs.
   \_cod ----------------------------

\_def \_printrefnum [#1@#2]{\_leavevmode % we must be in horizontal mode
   \_ifnonum \_else #1\_therefnum #2\_fi
   \_wlabel \_therefnum  % references, if `\label[<label>]` is declared
   \_ifnotoc \_else \_incr \_tocrefnum
       \_dest[toc:\_the\_tocrefnum]%
       \_wtotoc{\_the\_sectionlevel}{\_secinfo}%
               {\_therefnum}{\_detokenize\_ea{\_savedtitle}}%
   \_fi
}
\_def \_wtotoc #1#2#3#4{\_edef\_tmp{{#1}{#2}{#3}{#4}}\_ea\_wtotocA\_tmp}
\_def \_wtotocA #1#2#3#4{\_wref\_Xtoc{{#1}{#2}{#3}#4}}

   \_doc -----------------------------
   The \`\_abovetitle``{<penaltyA>}{<skipA>}` and \`\_belowtitle``{<skipB>}` pair
   communicates using a special penalty 11333 in vertical mode.
   The `\_belowtitle` puts the vertical skip (its value is saved in
   `\_savedtitleskip`) followed by this special penalty.
   The `\_abovetitle` reads `\lastpenalty` and if it has this special value
   then it removes the skip used before and doesn't use the parameter.
   The `\abovetitle` creates `<skipA>` only if whatever previous skip is less
   or equal than `<skipA>`. We must save `<whatever-skip>`, remove it,
   create `<penaltyA>` (if `\_belowtitle` does not precede) and create
   <whatever-skip> or `<skipA>` depending on what is greater.
   The amount of `<skipA>` is measured using `\setbox0=\vbox`.
   \_cod -----------------------------

\_newskip \_savedtitleskip
\_newskip \_savedlastskip
\_def\_abovetitle #1#2{\_savedlastskip=\_lastskip % <whatever-skip>
   \_ifdim\_lastskip>\_zo \_vskip-\_lastskip \_fi
   \_ifnum\_lastpenalty=11333 \_vskip-\_savedtitleskip \_else #1\_fi
   \_ifdim\_savedlastskip>\_zo \_setbox0=\_vbox{#2\_global\_tmpdim=\_lastskip}%
   \_else \_tmpdim=\_maxdimen \_fi
   \_ifdim\_savedlastskip>\_tmpdim \vskip\_savedlastskip \_else #2\_fi
}
\_def\_belowtitle #1{#1\_global\_savedtitleskip=\_lastskip \_penalty11333 }

   \_doc -----------------------------
   \`\nbpar` sets `\interlinepenaty` value.
   \`\nl` is \"new line" in the text (or titles), but space in toc or headlines or outlines.
   \_cod -----------------------------

\_def\_nbpar{{\_interlinepenalty=10000\_endgraf}}

\_protected\_def\_nl{\_hfil\_break}
\_regmacro {\_def\_nl{\_unskip\_space}} {\_def\_nl{\_unskip\_space}} {\_def\_nl{ }}
\_regmacro {\_def\nl{\_unskip\_space}}  {\_def\nl{\_unskip\_space}}  {\_def\nl{ }}

\_public \nbpar \nl ;

   \_doc -----------------------------
   \`\_firstnoindent` puts a material to `\everypar` in order to next
   paragraph will be without indentation. It is useful after titles.
   If you dislike this feature then you can say `\let\_firtnoindent=\relax`.
   The \`\_wipeepar` removes the material from `\everypar`.
   \_cod -----------------------------

\_def \_firstnoindent {\_global\_everypar={\_wipeepar \_setbox7=\_lastbox}}
\_def \_wipeepar {\_global\_everypar={}}

   \_doc -----------------------------
   The `\mark` (for running heads) is used in `\_printsection` only. We
   suppose that chapters will be printed after `\vfil\break`, so users can
   implement chapter titles for running headers directly by macros, no
   `\mark` mechanism is needed. But sections need `\mark`s. And they can be
   mixed with chapter's running heads, of course.

   The \`\_insertmark``{<title text>}` saves `\mark` in the format
   `{<title-num>} {<title-text>}`, so it can be printed \"as is" in
   `\headline` (see the space between them), or you can define a formating
   macro with two parameters for processing these data, if you need it.
   \_cod -----------------------------

\_def\_insertmark#1{\_mark{{\_ifnonum\_else\_therefnum\_fi} {\_unexpanded{#1}}}}

   \_doc -----------------------------
   \OpTeX/ sets `\headline={}` by default, so no running headings are printed.
   You can activate the running headings by following code, for example:
   \begtt
   \addto\_chapx {\_edef\_runningchap {\_thechapnum: \_unexpanded\_ea{\_savedtitle}}}
   \def \formathead #1#2{\isempty{#1}\iffalse #1: #2\fi}
   \headline = {%
      \ifodd \pageno
          \hfil \ea\formathead\firstmark{}{}%
      \else
          Chapter: \runningchap \hfil
      \fi
   }
   \endtt

   The \`\secl``<number> <title-text><eol>`
   should be used for various levels of sections (for example, when
   converting from Markdown to \OpTeX/). `\secl1` is `\chap`, `\secl2` is `\sec`,
   `\secl3` is `\secc` and all more levels (for <number>$>3$)
   are printed by the common \`\_seclp` macro. It declares only a simple design.
   If there is a requirement to use such more levels then the book designer can
   define something different here.
   \_cod -----------------------------

\_def\_secl{\_afterassignment\_secla \_sectionlevel=}
\_def\_secla{\_ifcase\_sectionlevel
   \_or\_ea\_chap\_or\_ea\_sec\_or\_ea\_secc\_else\_ea\_seclp\_fi}
\_eoldef\_seclp#1{\_par \_ifnum\_lastpenalty=0 \_removelastskip\_medskip\_fi
   \_noindent{\_bf #1}\_vadjust{\_nobreak}\_nl\_ignorepars}
\_def\_ignorepars{\_isnextchar\_par{\_ignoresecond\_ignorepars}{}}

\_public \secl ;

   \_doc -----------------------------
   The \`\caption``/<letter>` uses `\_<letter>num` counter.
   The group opened by `\caption` is finalized by first `\par` from
   an empty line or from `\vskip` or from `\endinsert`.
   The `\_printcaption<letter>` is called, it starts with
   printing of the caption.\nl
   The \`\cskip` macro inserts nonbreakable vertical space between the caption and
   the object.
   \_cod -----------------------------

\_def\_caption/#1{\_def\_tmpa{#1}\_nospaceafter \_capA}
\_optdef\_capA []{\_trylabel \_incaption}
\_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 \_cskip {\_par\_nobreak\_medskip} % space between caption and the object

\_public \caption \cskip ;

   \_doc -----------------------------
   The \`\_printcaptiont` and \`\_printcaptionf` macros start in vertical mode.
   They switch to horizontal mode and use `\_wlabel\_thecapnum` (in order to
   make reference and hyperlink destination) a they can use:
   \begitems
   * `\_thecaptitle` ... expands to the word Table or Figure (depending on
                         the current language).
   * `\_thecapnum` ...   expands to `\the<letter>num` (caption number).
   \enditems
   \_cod -----------------------------

\_def \_printcaptiont {%
   \_noindent \_wlabel\_thecapnum {\_bf\_thecaptitle~\_thecapnum}\_enspace
   \_narrowlastlinecentered\_iindent
}
\_let \_printcaptionf = \_printcaptiont % caption of figures = caption of tables

   \_doc -----------------------------
   The default format of `\caption` text is a paragraph in block narrower by
   `\_iindent` and with the last line is centered. This setting is done by
   the \`\_narrowlastlinecentered` macro.
   \_cod -----------------------------

\_def\_narrowlastlinecentered#1{%
   \_leftskip=#1plus1fil
   \_rightskip=#1plus-1fil
   \_parfillskip=0pt plus2fil\_relax
}

   \_doc -----------------------------
   \`\eqmark` is processed in display mode (we add `\eqno` primitive)
   or in internal mode when `\eqaligno` is used (we don't add `\eqno`).
   \_cod -----------------------------

\_optdef\_eqmark []{\_trylabel \_ineqmark}
\_def\_ineqmark{\_incr\_dnum
  \_ifinner\_else\_eqno \_fi
  \_wlabel\_thednum \_hbox{\_thednum}%
}
\_public \eqmark ;

   \_doc -----------------------------
   The \`\numberedpar` `<letter>{<name>}` is implemented here.
   \_cod -----------------------------

\_newcount\_counterA \_newcount\_counterB \_newcount\_counterC
\_newcount\_counterD \_newcount\_counterE

\_def\_resetABCDE {\_counterA=0 \_counterB=0 \_counterC=0 \_counterD=0 \_counterE=0 }

\_def \_theAnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterA}
\_def \_theBnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterB}
\_def \_theCnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterC}
\_def \_theDnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterD}
\_def \_theEnum {\_othe\_chapnum.\_othe\_secnum.\_the\_counterE}

\_def\_numberedpar#1#2{\_ea \_incr \_csname _counter#1\_endcsname
   \_def\_tmpa{#1}\_def\_tmpb{#2}\_numberedparparam}
\_optdef\_numberedparparam[]{%
   \_ea \_printnumberedpar \_csname _the\_tmpa num\_ea\_endcsname\_ea{\_tmpb}}

\_public \numberedpar ;

   \_doc -----------------------------
   The \`\_printnumberedpar` `\theXnum {<name>}` opens numbered paragraph and
   prints it. The optional parameter is in `\_the\_opt`. You can re-define
   it if you need another design.

   `\_printnumberedpar` needs not to be re-defined if you only want to print
   Theorems in italic and to insert vertical skips (for example). You can do this
   by the following code:
   \begtt
   \def\theorem    {\medskip\bgroup\it \numberedpar A{Theorem}}
   \def\endtheorem {\par\egroup\medskip}

   \theorem Let $M$ be... \endtheorem
   \endtt
   \_cod -----------------------------

\_def \_printnumberedpar #1#2{\_par
   \_noindent\_wlabel #1%
   {\_bf #2 #1\_istoksempty\_opt\_iffalse \_space \_the\_opt \_fi.}\_space
   \_ignorespaces
}

\_endcode % -------------------------------------

2021-01-11 \secl introduced
2021-01-05 \_thednum printed in text mode in its both occurences.
2020-04-28 \_secfonts etc: \_boldify is last.
2020-04-22 \_chapx, \_secx, \_seccx rewritten
2020-03-14 introduced