font-fea.mklx /size: 14 Kb    last modification: 2023-12-21 09:44
1%D \module
2%D   [       file=font-sty,
3%D        version=2011.01.13, % (copied fron font-ini)
4%D          title=\CONTEXT\ Font Macros,
5%D       subtitle=features,
6%D         author=Hans Hagen,
7%D           date=\currentdate,
8%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
9%C
10%C This module is part of the \CONTEXT\ macro||package and is
11%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
12%C details.
13
14\writestatus{loading}{ConTeXt Font Macros / Features}
15
16\unprotect
17
18%D Feature management.
19%D
20%D \starttyping
21%D \definefontfeature[smallcaps][smcp=yes,script=latn]
22%D \definefontfeature[smallcaps][SmallCapitals=yes,script=latn]
23%D \definefontfeature[smallcaps][Small Capitals=yes,script=latn]
24%D \definefontfeature[smallcaps][small capitals=yes,script=latn]
25%D \definefontfeature[smallcaps][smallcapitals=yes,script=latn]
26%D
27%D \definedfont[cambria*smallcaps] test
28%D
29%D \starttext
30%D \definefontfeature[basekerned][default][mode=base]
31%D \definefontfeature[nodekerned][default][mode=node]
32%D \definefontfeature[nonekerned][default][mode=base,kern=no]
33%D \setupcolors[state=start]
34%D \startoverlay
35%D     {\vbox{\red  \definedfont[Serif*nonekerned at 12pt]\input tufte }}
36%D     {\vbox{\blue \definedfont[Serif*basekerned at 12pt]\input tufte }}
37%D     {\vbox{\green\definedfont[Serif*nodekerned at 12pt]\input tufte }}
38%D \stopoverlay
39%D \stoptext
40%D
41%D \enabletrackers[otf.kerns]
42%D
43%D \definefontfeature[withkern][default][mode=node]
44%D \definefontfeature[nokern]  [default][mode=node,kern=no]
45%D \definefontfeature[single]  [default][mode=node,cpsp=yes]
46%D \definefontfeature[simple]  [default][mode=node,cpsp=yes,kern=no]
47%D
48%D {\definedfont[Serif*default] [FGFGFGFGFGFGFGFGFGFGFGFGFG ABCDEFGHIJKLMNOPQRSTUVWXYZ] \par}
49%D {\definedfont[Serif*nokern]  [FGFGFGFGFGFGFGFGFGFGFGFGFG ABCDEFGHIJKLMNOPQRSTUVWXYZ] \par}
50%D {\definedfont[Serif*single]  [FGFGFGFGFGFGFGFGFGFGFGFGFG ABCDEFGHIJKLMNOPQRSTUVWXYZ] \par}
51%D {\definedfont[Serif*simple]  [FGFGFGFGFGFGFGFGFGFGFGFGFG ABCDEFGHIJKLMNOPQRSTUVWXYZ] \par}
52%D \stoptyping
53
54% \definefontfeature[slanted]  [default][slant=.25]
55% \definefontfeature[stretched][default][stretch=2]
56%
57% \start \definedfont[SerifBold*slanted   at 20pt] \ruledhbox{Test!} \stop
58% \start \definedfont[SerifBold*stretched at 20pt] \ruledhbox{Test!} \stop
59%
60% \definefontfeature[default]     [liga=yes,texligatures=yes,texquotes=yes]
61% \definefontfeature[default-caps][liga=yes,texligatures=yes,texquotes=yes,smcp=yes,script=latn]
62%
63% \starttypescript [serif] [palatino-nova-regular] [name]
64%     \definefontsynonym[Serif]    [palatinonova-regular][features=default]
65%     \definefontsynonym[SerifCaps][palatinonova-regular][features=default-caps] % also sets Serif
66% \stoptypescript
67%
68% \starttypescript [serif] [palatino-nova-regular] [name]
69%     \definefontsynonym[Serif]          [palatinonova-regular*default]
70%     \definefontsynonym[SerifCaps]      [palatinonova-regular*default-caps]
71% \stoptypescript
72%
73% \definetypeface[mainface][rm][serif][palatino-nova-regular][default] \setupbodyfont[mainface]
74%
75% \starttext
76%   ``Test'' -- --- ff fi fl \sc ``Test'' -- --- ff fi fl
77% \stoptext
78%
79% \definefontfeature
80%   [default-base]
81%   [script=latn,language=dflt,liga=yes,kern=yes,tlig=yes,trep=yes]
82% \definefontfeature
83%   [default-node]
84%   [script=latn,language=dflt,liga=yes,kern=yes,tlig=yes,trep=yes,mode=node]
85% \definefontfeature
86%   [default-none]
87%   [script=latn,language=dflt,liga=yes,kern=no, tlig=yes,trep=yes]
88%
89% \startoverlay
90%     {\vtop{\color[red]  {\font\test=name:lmroman12regular*default-node \test \input ward \input zapf \input linden }}}
91%     {\vtop{\color[green]{\font\test=name:lmroman12regular*default-base \test \input ward \input zapf \input linden }}}
92%     {\vtop{\color[blue] {\font\test=name:lmroman12regular*default-none \test \input ward \input zapf \input linden }}}
93% \stopoverlay
94%
95% \blank
96%
97% \startoverlay
98%     {\vtop{\color[red]  {\font\test=name:texgyrepagella*default-node \test \input ward \input zapf \input linden }}}
99%     {\vtop{\color[green]{\font\test=name:texgyrepagella*default-base \test \input ward \input zapf \input linden }}}
100%     {\vtop{\color[blue] {\font\test=name:texgyrepagella*default-none \test \input ward \input zapf \input linden }}}
101% \stopoverlay
102%
103% \blank
104%
105% \startoverlay
106%     {\vtop{\color[red]  {\font\test=name:palatinonovaregular*default-node \test \input ward \input zapf \input linden }}}
107%     {\vtop{\color[green]{\font\test=name:palatinonovaregular*default-base \test \input ward \input zapf \input linden }}}
108%     {\vtop{\color[blue] {\font\test=name:palatinonovaregular*default-none \test \input ward \input zapf \input linden }}}
109% \stopoverlay
110%
111% \startoverlay
112%     {\vtop{\color[red]  {\font\test=name:OfficinaSerifBookITC*default-node \test \input ward \input zapf \input linden }}}
113%     {\vtop{\color[green]{\font\test=name:OfficinaSerifBookITC*default-base \test \input ward \input zapf \input linden }}}
114%     {\vtop{\color[blue] {\font\test=name:OfficinaSerifBookITC*default-none \test \input ward \input zapf \input linden }}}
115% \stopoverlay
116%
117% \definefontfeature[superdefault][default][compose=yes]
118%
119% {\font\oeps=name:lmroman10regular*default      at 30pt \oeps test \char7683}
120% {\font\oeps=name:lmroman10regular*superdefault at 30pt \oeps test \char7683}
121
122\permanent\tolerant\protected\def\definefontfeature[#featureset]#spacer[#parent]#spacer[#settings]%
123  {\clf_definefontfeature{#featureset}{#parent}{#settings}}
124
125\permanent\tolerant\protected\def\adaptfontfeature[#pattern]#spacer[#settings]%
126  {\clf_adaptfontfeature{#pattern}{#settings}}
127
128\permanent\protected\def\fontfeatureslist[#name]#spacer[#separator]% todo: arg voor type
129  {\clf_featurelist{#name}{\detokenize{#separator}}}
130
131\attribute\zerocount\attributeunsetvalue
132
133\glyphdatafield\zerocount
134
135\let\font_dynamic_value\glyphdatafield
136
137% beware: these are global features on top of existing font features
138
139\mutable\let \currentfeature      \s!current
140\let         \m_font_feature_list \s!current
141\lettonothing\m_font_feature_asked
142\newconstant \c_font_feature_state
143
144\newevery\everyfontfeatureswitch
145
146% hashing at this end is slower
147
148\permanent\tolerant\protected\def\addfeature        [#1]#;#2{\edef\m_font_feature_asked{#1#2}\font_feature_add}
149\permanent\tolerant\protected\def\subtractfeature   [#1]#;#2{\edef\m_font_feature_asked{#1#2}\font_feature_subtract}
150\permanent\tolerant\protected\def\replacefeature    [#1]#;#2{\edef\m_font_feature_asked{#1#2}\font_feature_replace}
151\permanent\tolerant\protected\def\resetandaddfeature[#1]#;#2{\edef\m_font_feature_asked{#1#2}\font_feature_reset_add}
152\permanent\tolerant\protected\def\feature           [#1]#;#2{\begincsname\??featureshortcut#1#2\endcsname}
153
154% for old times sake
155
156\permanent\protected\def\doaddfeature        #1{\edef\m_font_feature_asked{#1}\font_feature_add}
157\permanent\protected\def\dosubtractfeature   #1{\edef\m_font_feature_asked{#1}\font_feature_subtract}
158\permanent\protected\def\doreplacefeature    #1{\edef\m_font_feature_asked{#1}\font_feature_replace}
159\permanent\protected\def\doresetandaddfeature#1{\edef\m_font_feature_asked{#1}\font_feature_reset_add}
160
161\protected\def\font_feature_add
162  {\ifnum\c_font_feature_state=\plusone
163     \ifx\m_font_feature_asked\currentfeature\else
164       \font_feature_add_indeed
165     \fi
166   \else
167     \font_feature_add_indeed
168   \fi}
169
170\protected\def\font_feature_add_indeed
171  {\clf_addfeature{\m_font_feature_list}{\m_font_feature_asked}%
172   \edef\m_font_feature_list{\m_font_feature_list+\m_font_feature_asked}% also + at the lua end
173   \c_font_feature_state\plusone
174   \let\currentfeature\m_font_feature_asked
175   \expand\everyfontfeatureswitch}
176
177\protected\def\font_feature_subtract
178  {\ifnum\c_font_feature_state=\minusone
179     \ifx\m_font_feature_asked\currentfeature\else
180       \font_feature_subtract_indeed
181     \fi
182   \else
183     \font_feature_subtract_indeed
184   \fi}
185
186\protected\def\font_feature_subtract_indeed
187  {\clf_subtractfeature{\m_font_feature_list}{\m_font_feature_asked}%
188   \edef\m_font_feature_list{\m_font_feature_list-\m_font_feature_asked}% also - at the lua end
189   \c_font_feature_state\minusone
190   \let\currentfeature\m_font_feature_asked
191   \expand\everyfontfeatureswitch}
192
193\protected\def\font_feature_replace
194  {\ifzero\c_font_feature_state
195     \ifx\m_font_feature_asked\currentfeature\else
196       \font_feature_replace_indeed
197     \fi
198   \else
199     \font_feature_replace_indeed
200   \fi}
201
202\protected\def\font_feature_replace_indeed
203  {\clf_replacefeature{\m_font_feature_list}{\m_font_feature_asked}%
204   \edef\m_font_feature_list{\m_font_feature_list=\m_font_feature_asked}% also = at the lua end
205   \c_font_feature_state\zerocount
206   \let\currentfeature\m_font_feature_asked
207   \expand\everyfontfeatureswitch}
208
209\permanent\protected\def\resetfeature
210  {\ifx\currentfeature\s!current \else
211     \font_feature_reset_indeed
212   \fi}
213
214\protected\def\font_feature_reset_indeed
215  {\lettonothing\m_font_feature_asked
216   \let\currentfeature\s!current
217   \let\m_font_feature_list\s!current
218   \clf_resetfeature}
219
220\permanent\protected\def\revivefeature
221  {\ifx\currentfeature\s!current \else
222     \font_feature_revive_indeed
223   \fi}
224
225\protected\def\font_feature_revive_indeed
226  {\clf_revivefeature{\m_font_feature_list}}
227
228\protected\def\font_feature_reset_add
229  {\ifnum\c_font_feature_state=\plusone
230     \ifx\m_font_feature_asked\currentfeature\else
231       \font_feature_reset_add_indeed
232     \fi
233   \else
234     \font_feature_reset_add_indeed
235   \fi}
236
237\protected\def\font_feature_reset_add_indeed
238  {\clf_addfeature{\s!current}{\m_font_feature_asked}%
239   \edef\m_font_feature_list{\s!current+\m_font_feature_asked}% also + at the lua end
240   \c_font_feature_state\plusone
241   \let\currentfeature\m_font_feature_asked
242   \expand\everyfontfeatureswitch}
243
244\installcorenamespace{featureshortcut}
245
246\letcsname\??featureshortcut +\endcsname\addfeature
247\letcsname\??featureshortcut -\endcsname\subtractfeature
248\letcsname\??featureshortcut =\endcsname\replacefeature
249\letcsname\??featureshortcut !\endcsname\resetandaddfeature
250\letcsname\??featureshortcut >\endcsname\revivefeature
251\letcsname\??featureshortcut <\endcsname\resetfeature
252
253\letcsname\??featureshortcut\v!more   \endcsname\addfeature      % add set to previous set and combine with font set
254\letcsname\??featureshortcut\v!less   \endcsname\subtractfeature % subtract set from previous set and combine with font set
255\letcsname\??featureshortcut\v!new    \endcsname\replacefeature  % replace font set
256\letcsname\??featureshortcut\v!reset  \endcsname\resetfeature    % forget sets and revert to font set
257\letcsname\??featureshortcut\v!default\endcsname\revivefeature   % make sure the current set is used on top of the font set
258\letcsname\??featureshortcut\v!old    \endcsname\revivefeature
259\letcsname\??featureshortcut\v!local  \endcsname\resetandaddfeature
260\letcsname\??featureshortcut\s!unknown\endcsname\empty
261
262% experimental bonus:
263
264% \protected\def\addfflanguage
265%   {\ifnum\c_font_feature_state=\plusone
266%      \ifx\currentlanguage\currentfeature\else
267%        \font_feature_add_language_indeed
268%      \fi
269%    \else
270%      \font_feature_add_language_indeed
271%    \fi}
272%
273% \protected\def\font_feature_add_language_indeed
274%   {\clf_addfeature{\m_font_feature_list}{\currentlanguage}%
275%    \edef\m_font_feature_list{\m_font_feature_list+\currentlanguage}% also + at the lua end
276%    \c_font_feature_state\plusone
277%    \let\currentfeature\currentlanguage}
278%
279% some 3% slower:
280
281% \protected\def\addfflanguage
282%   {\let\m_font_feature_asked\currentlanguage
283%    \font_feature_add}
284
285\let\m_font_feature_language\currentlanguage
286
287\permanent\protected\def\addfflanguage
288  {\ifx\currentlanguage\m_font_feature_language\else
289     \let\m_font_feature_language\currentlanguage
290     \let\m_font_feature_asked   \currentlanguage
291     \font_feature_add
292   \fi}
293
294% just for old times sake:
295
296\permanent\protected\def\featureattribute#feature%
297  {\clf_featureattribute{#feature}}
298
299\permanent\protected\def\setfontfeature#feature%
300  {\edef\currentfeature{#feature}%
301   \let\m_font_feature_list\currentfeature
302   \clf_setfontfeature{\currentfeature}}
303
304%  these are obsolete (don't use them any longer)
305
306\aliased\let\resetfontfeature\resetfeature % obsolete
307
308%  these are obsolete (don't use them any longer)
309
310% \let\addfontfeaturetoset        \font_feature_add_nop      % obsolete
311% \let\subtractfontfeaturefromset \font_feature_subtract_nop % obsolete
312% \let\addfontfeaturetofont       \font_feature_add_nop      % obsolete
313% \let\subtractfontfeaturefromfont\font_feature_subtract_nop % obsolete
314
315% these are obsolete (don't use them any longer)
316
317\aliased\let\setff\setfontfeature    % obsolete
318\aliased\let\addfs\doaddfeature      % obsolete
319\aliased\let\subfs\dosubtractfeature % obsolete
320\aliased\let\addff\doaddfeature      % obsolete
321\aliased\let\subff\dosubtractfeature % obsolete
322
323%D \macros
324%D   {os}
325%D
326%D In good old \TEX, the old style numerals were often taken from the math fonts. No
327%D longer.
328
329\definefontfeature
330  [just-os]
331  [mode=node,onum=yes]
332
333%frozen\protected\def\sc{\setfontfeature{smallcaps}}
334\permanent\protected\def\os{\setfontfeature{just-os}}
335
336% \doifelsecurrentfonthasfeature{smcp}{YES}{NO}
337% \doifelsecurrentfonthasfeature{crap}{YES}{NO}
338% \doifelsecurrentfonthasfeature{kern}{YES}{NO}
339
340\permanent\def\doifelsecurrentfonthasfeature#feature{\clf_doifelsecurrentfonthasfeature{#feature}} % expandable
341\permanent\def\doifelsefontfeature          #feature{\clf_doifelsefontfeature          {#feature}} % expandable
342\permanent\def\doifunknownfontfeature       #feature{\clf_doifunknownfontfeature       {#feature}} % expandable
343
344\aliased\let\doifcurrentfonthasfeatureelse\doifelsecurrentfonthasfeature
345\aliased\let\doiffontfeatureelse          \doifelsefontfeature
346
347% new:
348
349\clf_registerlanguagefeatures
350
351% also new
352
353\permanent\protected\def\useaddfontfeatureparameter#namespace% faster local variant
354  {\edef\m_font_feature_asked{#namespace\c!features}%
355   \ifempty\m_font_feature_asked\else
356     \font_feature_add
357   \fi}
358
359% let's put this here:
360
361\permanent\protected\def\slashedzero
362  {\dontleavehmode
363   \begingroup
364  %\addff{zero}
365   \doaddfeature{zero}%
366   0%
367   \endgroup}
368
369% not nice but maybe handy
370
371% \starttyping
372% \blockligatures[fi,ff] \blockligatures[fl]
373%
374% \definefontfeature[default:b][default][blockligatures=yes]
375%
376% \setupbodyfont[pagella] \showfontkerns
377%
378% \definedfont[Serif*default:b]
379%
380% \startTEXpage[offset=1em]
381%     fi ff fl
382% \stopTEXpage
383% \stoptyping
384
385\permanent\protected\def\blockligatures[#1]{\clf_blockligatures{#1}}
386
387\protect \endinput
388