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1%D \module
2%D   [       file=lang-lab,
3%D        version=1997.08.27,
4%D          title=\CONTEXT\ Language Macros,
5%D       subtitle=Labels,
6%D         author=Hans Hagen / Tobias Burnus,
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 Language Macros / Labels}
15
16\registerctxluafile{lang-lab}{}
17\registerctxluafile{lang-txt}{}
18
19\unprotect
20
21%D Left-overs:
22
23\ifdefined\sixperemspace \else
24    \def\sixperemspace{\normalUchar"2006}
25\fi
26
27%D In this module we deal with language dependant labels and prefixes, like in {\em
28%D Figure~12} and {\em Chapter 1}. In this file we set the default values. Users can
29%D easily overrule these.
30%D
31%D This module is dedicated to the grandfather of Tobias Burnus, who's extensive
32%D languages oriented library helped us a lot in finding the right translations. All
33%D those labels are collected in files that reflect their common ancestor.
34%D
35%D Not all languages can be satisfied with the labeling mechanism as provided here.
36%D Chinese for instance put a label in front as well as after a part number. This is
37%D why the current implementation of labels supports two labels too.
38
39%D \macros
40%D   {setupheadtext, setuplabeltext}
41%D
42%D First we present some macros that deal with what we will call head and label
43%D texts. Such texts are defines by:
44%D
45%D \showsetup{setupheadtext}
46%D \showsetup{setuplabeltext}
47%D
48%D A regular \CONTEXT\ stores some 1500 labels at most.
49%D
50%D These commands accept all kind of inputs:
51%D
52%D \starttyping
53%D \setuplabeltext [language] [labellabel=text]
54%D \setuplabeltext [language] [labellabel=text,labellabel=text,...]
55%D \setuplabeltext            [labellabel=text]
56%D \setuplabeltext            [labellabel=text,labellabel=text,...]
57%D \stoptyping
58%D
59%D The last two cases concern the current language.
60
61\installcorenamespace{label}
62
63\let\currentlabelcategory\empty
64
65\unexpanded\def\definelabelclass
66  {\dodoubleempty\lang_labels_define_class}
67
68\def\lang_labels_define_class[#1][#2]%
69  {\normalexpanded
70     {\lang_labels_define_class_indeed
71        {#1}%
72        {\ifsecondargument#2\else\zerocount\fi}%
73        \expandafter\noexpand\csname   dogetupsome#1text\endcsname
74        \expandafter\noexpand\csname          #1language\endcsname
75        \expandafter\noexpand\csname dodogetupsome#1text\endcsname
76        \expandafter\noexpand\csname          left#1text\endcsname
77        \expandafter\noexpand\csname         right#1text\endcsname
78        \expandafter\noexpand\csname             #1texts\endcsname
79        \expandafter\noexpand\csname              #1text\endcsname}}
80
81% hm, not interfaced
82
83\let\thetextprefix\empty
84
85\unexpanded\def\lang_labels_define_class_indeed#1#2#3#4#5#6#7#8#9%
86  {\setuvalue{setup#1text}{\protecttextprefixes#2\def\currenttextprefixclass{#1}\dodoubleempty\lang_labels_text_prefix_setup}%
87   \setuvalue{preset#1text}{\protecttextprefixes1\def\currenttextprefixclass{#1}\dodoubleempty\lang_labels_text_prefix_setup}%
88   \setuvalue{copy#1text}{\protecttextprefixes1\def\currenttextprefixclass{#1}\dodoubleempty\lang_labels_text_prefix_copy}%
89   \setuvalue{start#1text}{\protecttextprefixes1\def\currenttextprefixclass{#1}\dotripleempty\lang_labels_text_prefix_start[#1]}%
90   \letvalue{stop#1text}\relax
   \def#4{\reallanguagetag{\defaultlanguage\currentmainlanguage}}%
92   \ifnum#2=\plustwo % used for math and tags
93     \def#3{#5#4}%
94     \def#5##1##2% ##1=language
95       {\ifcsname\??label\currentlabelcategory#1:##1:##2\endcsname
96          \lastnamedcs
97        \else\ifcsname\??label#1:##1:##2\endcsname
98          \lastnamedcs
99      % \else\ifcsname\??language#4\s!default\endcsname
100      %   \expandafter#5\csname\??language#4\s!default\endcsname{##2}%
101        \else\ifcsname\??language##1\s!default\endcsname
102         %\expandafter#5\csname\??language##1\s!default\endcsname{##2}%
103          \expandafter#5\lastnamedcs{##2}%
104        \else\ifcsname\??label\currentlabelcategory#1:##2\endcsname
105          \lastnamedcs
106        \else\ifcsname\??label#1:##2\endcsname
107          \lastnamedcs
108        \else\ifcsname\??label\currentlabelcategory#1:\s!en:##2\endcsname
109          \lastnamedcs
110        \else\ifcsname\??label#1:\s!en:##2\endcsname
111          \lastnamedcs
112        \else
113          ##2%
114        \fi\fi\fi\fi\fi\fi\fi}%
115     \let#6\gobbleoneargument
116     \let#7\gobbleoneargument
117     \let#8\gobbletwoarguments
118     \let#9#3%
119   \else
120     \unexpanded\def#3{#5#4}%
121     \unexpanded\def#5##1##2%
122       {\ifcsname\??label#1:##1:##2\endcsname
123         %\expandafter\let\expandafter\thetextprefix\csname\??label#1:##1:##2\endcsname
124          \expandafter\let\expandafter\thetextprefix\lastnamedcs
125        \else\ifcsname\??language#4\s!default\endcsname
126         %\expandafter#5\csname\??language#4\s!default\endcsname{##2}%
127          \expandafter#5\lastnamedcs{##2}%
128        \else\ifcsname\??label#1:##2\endcsname
129         %\expandafter\let\expandafter\thetextprefix\csname\??label#1:##2\endcsname
130          \expandafter\let\expandafter\thetextprefix\lastnamedcs
131        \else\ifcsname\??label#1:\s!en:##2\endcsname
132         %\expandafter\let\expandafter\thetextprefix\csname\??label#1:\s!en:##2\endcsname
133          \expandafter\let\expandafter\thetextprefix\lastnamedcs
134        \else
135          \let\thetextprefix\dummytextprefix
136        \fi\fi\fi\fi}%
137     \unexpanded\def#6##1{#3{##1}\expandafter\flushleftlabelclass \thetextprefix}%
138     \unexpanded\def#7##1{#3{##1}\expandafter\flushrightlabelclass\thetextprefix}%
139     \unexpanded\def#8##1{#3{##1}\expandafter\flushbothlabelclass \thetextprefix}% #2
140     \unexpanded\def#9##1{#3{##1}\expandafter\flushleftlabelclass \thetextprefix}%
141   \fi
142   \appendtoks
143     \let#6\firstofoneargument % to be checked
144     \let#7\firstofoneargument % to be checked
145     \let#8\firstofoneargument % to be checked
146     \let#9\firstofoneargument % to be checked
147   \to \everysimplifycommands}
148
149\let\flushleftlabelclass \firstoftwoarguments
150\let\flushrightlabelclass\secondoftwoarguments
151\def\flushbothlabelclass #1#2#3{#1#3#2}
152\def\dummytextprefix     {\empty\empty}
153
154%D \macros
155%D   {headtext, labeltext, leftlabeltext, rightlabeltext, labeltexts}
156%D
157%D Once defined, head and label texts can be called upon using:
158%D
159%D \showsetup{headtext}
160%D \showsetup{labeltext}
161%D
162%D \macros
163%D   {presetheadtext,presetlabeltext}
164%D
165%D These macros enable us to automatically define head and label texts without
166%D replacing predefined ones. They are internal macros.
167
168\appendtoks \let\labellanguage\currentlanguage \to \everycurrentdate
169
170\newconstant\protecttextprefixes
171
172\let\currenttextprefixtag  \s!unknown
173\let\currenttextprefixclass\s!unknown
174
175\def\lang_labels_text_prefix_start[#1][#2][#3]% class language name
176  {\ifthirdargument
177     \edef\currenttextprefixtag{\reallanguagetag{#2}}%
178     \edef\currenttextprefixname{#3}%
179   \else
     \edef\currenttextprefixtag{\reallanguagetag\currentmainlanguage}%
181     \edef\currenttextprefixname{#2}%
182   \fi
183   \grabuntil{stop#1text}\lang_labels_text_prefix_start_indeed}
184
185\def\lang_labels_text_prefix_start_indeed#1% text (not special checking done here yet, only for long texts anyway)
186  {\expandafter\edef\csname\??label\currenttextprefixclass:\currenttextprefixtag:\currenttextprefixname\endcsname%
187     {{\clf_strip{#1}}\empty}}
188
189\def\lang_labels_text_prefix_setup[#1][#2]%
190  {\ifsecondargument
191     \edef\currenttextprefixtag{\reallanguagetag{#1}}%
192     \processcommalist[#2]\lang_labels_text_prefix_setup_indeed
193   \else
     \edef\currenttextprefixtag{\reallanguagetag\currentmainlanguage}%
195     \processcommalist[#1]\lang_labels_text_prefix_setup_indeed
196   \fi}
197
198\def\lang_labels_text_prefix_setup_indeed#1%
199  {\lang_labels_text_prefix_assign[#1]}
200
201\def\lang_labels_text_prefix_assign[#1=#2]%
202  {\lang_labels_text_prefix_assign_indeed{#1}[#2,,]}
203
204\def\lang_labels_text_prefix_assign_indeed#1%
205  {\ifcase\protecttextprefixes
206     % no checking
207     \expandafter\lang_labels_text_prefix_assign_yes
208   \or
209     % checking
210     \ifcsname\??label\currenttextprefixclass:\currenttextprefixtag:#1\endcsname
211       \expandafter\expandafter\expandafter\lang_labels_text_prefix_assign_nop
212     \else
213       \expandafter\expandafter\expandafter\lang_labels_text_prefix_assign_yes
214     \fi
215   \or
216     % simple assignment (a bit overkill but it fits in the whole)
217     \expandafter\lang_labels_text_prefix_assign_dumb
218   \fi{#1}}
219
220\let\m_lang_labels_left \empty
221\let\m_lang_labels_right\empty
222
223% \def\lang_labels_text_prefix_assign_yes#1[#2,#3,#4]%
224%   {\def\m_lang_labels_left {#2}% no longer an edef ... else \Word undefined expansion issues
225%    \def\m_lang_labels_right{#3}% no longer an edef ... else \Word undefined expansion issues
226%    \ifx\m_lang_labels_right\empty
227%      \ifx\m_lang_labels_left\empty
228%        \expandafter\def\csname\??label\currenttextprefixclass:\currenttextprefixtag:#1\endcsname{\empty\empty}%
229%      \else
230%        \expandafter\def\csname\??label\currenttextprefixclass:\currenttextprefixtag:#1\endcsname{{#2}\empty}%
231%      \fi
232%    \else
233%      \expandafter\def\csname\??label\currenttextprefixclass:\currenttextprefixtag:#1\endcsname{{#2}{#3}}%
234%    \fi}
235%
236% how we love obscure efficicency ...
237
238\def\lang_labels_text_prefix_assign_yes#1[#2,#3,#4]%
239  {\def\m_lang_labels_left {#2}% no longer an edef ... else \Word undefined expansion issues
240   \def\m_lang_labels_right{#3}% no longer an edef ... else \Word undefined expansion issues
241   \expandafter\def\csname\??label\currenttextprefixclass:\currenttextprefixtag:#1%
242     \ifx\m_lang_labels_right\empty
243       \ifx\m_lang_labels_left\empty
244         \endcsname{\empty\empty}%
245       \else
246         \endcsname{{#2}\empty}%
247       \fi
248     \else
249       \endcsname{{#2}{#3}}%
250     \fi}
251
252\def\lang_labels_text_prefix_assign_nop#1[#2]%
253  {}
254
255\def\lang_labels_text_prefix_assign_dumb#1[#2,#3]%
256  {\expandafter\def\csname\??label\currenttextprefixclass:\currenttextprefixtag:#1\endcsname{#2}}
257
258\unexpanded\def\setlabeltextpair#1#2#3#4#5% a fast one for usage at the Lua end
259  {%\writestatus{!!!!}{#1:\reallanguagetag{#2}:#3}%
260   \expandafter\def\csname\??label#1:\reallanguagetag{#2}:#3\endcsname{{#4}{#5}}} % class tag key left right
261
262\def\lang_labels_text_prefix_copy[#1][#2]%
263  {\ifsecondargument
264     \edef\currenttextprefixtag{\reallanguagetag{#1}}%
265     \processcommalist[#2]\lang_labels_text_prefix_copy_indeed
266   \else
     \edef\currenttextprefixtag{\reallanguagetag\currentmainlanguage}%
268     \processcommalist[#1]\lang_labels_text_prefix_copy_indeed
269   \fi}
270
271\def\lang_labels_text_prefix_copy_indeed#1%
272  {\lang_labels_text_prefix_copy_pair[#1]}
273
274\def\lang_labels_text_prefix_copy_pair[#1=#2]%
275  {\lang_labels_text_prefix_copy_pair_indeed{#1}[#2,,]}
276
277% \def\lang_labels_text_prefix_copy_pair_indeed#1[#2,#3]%
278%   {\expandafter\let
279%      \csname\??label\currenttextprefixclass:\currenttextprefixtag:#1\expandafter\endcsname
280%      \csname\??label\currenttextprefixclass:\currenttextprefixtag:#2\endcsname}
281%
282% this delays the aliasing so that we can switch maillanguage in between
283
284\def\lang_labels_text_prefix_copy_pair_indeed#1[#2,#3]%
285  {\expandafter\edef\csname\??label\currenttextprefixclass:#1\endcsname
     {{\noexpand\csname\??label\currenttextprefixclass:\noexpand\reallanguagetag\noexpand\currentmainlanguage:#2\endcsname}{}}}
287
288\definelabelclass [head]      [0] % titles
289\definelabelclass [label]     [0] % texts
290\definelabelclass [mathlabel] [0] % functions
291\definelabelclass [taglabel]  [2] % tags
292
293\clf_definelabels{head}{titles}\s!true\relax
294\clf_definelabels{label}{texts}\s!true\relax
295\clf_definelabels{mathlabel}{functions}\s!false\relax
296\clf_definelabels{taglabel}{tags}\s!false\relax
297
298%D \macros
299%D   {translate}
300%D
301%D Sometimes macros contain language specific words that are to be typeset. Such
302%D macros can be made (more) language independant by using:
303%D
304%D \showsetup{translate}
305%D
306%D like for instance:
307%D
308%D \starttyping
309%D \translate[en=something,nl=iets]
310%D \stoptyping
311%D
312%D which expands to {\em something} or {\em iets}, depending on de current language.
313
314\installcorenamespace{translation}
315
316\unexpanded\def\translate
317  {\dosingleempty\lang_translate}
318
319\def\lang_translate[#1]%
320  {\getparameters[\??translation][#1]%
321   \ifcsname\??translation\currentlanguage\endcsname
322     \lastnamedcs
323   \else\ifcsname\??translation\s!en\endcsname
324     \lastnamedcs
325   \else
326     [translation #1]%
327   \fi\fi}
328
329%D When used without argument, the last defined values are used. This enables
330%D repetitive use like
331%D
332%D \starttyping
333%D \en \translate\ means \nl \translate
334%D \stoptyping
335
336%D \macros
337%D   {assigntranslation}
338%D
339%D This macro is a system macro, and can be used to assign a translation to a macro.
340%D Its form is:
341%D
342%D \starttyping
343%D \assigntranslation[en=something,nl=iets]\to\command
344%D \stoptyping
345
346\unexpanded\def\assigntranslation[#1]\to#2% bad, this \to
347  {\getparameters[\??translation][#1]%
348   \edef#2{\begincsname\??translation\currentlanguage\endcsname}}
349
350%D \macros
351%D   {commalistsentence}
352%D
353%D Redone in \LUA:
354%D
355%D \startbuffer
356%D \commalistsentence[aap,noot,mies]
357%D \commalistsentence[aap,noot]
358%D \commalistsentence[aap]
359%D \commalistsentence[a,b,c]
360%D \commalistsentence[a,b,c][{ \& },{ and }]
361%D \commalistsentence[a,b,c][+,-]
362%D \stopbuffer
363%D
364%D \typebuffer
365%D
366%D \startlines
367%D \getbuffer
368%D \stoplines
369
370\unexpanded\def\commalistsentence
371  {\dodoubleempty\typo_helpers_concat_comma_list}
372
373\def\typo_helpers_concat_comma_list[#1][#2]%
374  {\clf_concatcommalist
375     text       {#1}%
376     separators {#2}%
377     separator  {\detokenize\expandafter{\normalexpanded{\labeltext{and-1}}}}%
378     last       {\detokenize\expandafter{\normalexpanded{\labeltext{and-2}}}}%
379   \relax}
380
381\setuplabeltext [\s!nl] [and-1={{, }}, and-2={{ en }}]   % 1, 2 en 3
382\setuplabeltext [\s!en] [and-1={{, }}, and-2={{, }}]     % 1, 2, 3
383\setuplabeltext [\s!de] [and-1={{, }}, and-2={{ und }}]  % 1, 2 und 3
384\setuplabeltext [\s!hr] [and-1={{, }}, and-2={{ i }}]    % 1, 2 i 3
385
386%D Goodie (handy at \LUA\ end):
387
388\unexpanded\def\LABELTEXT#1{\WORD{\labeltext{#1}}} % only for simple cases!
389
390\protect \endinput
391