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1%D \module
2%D   [       file=page-lin,
3%D        version=2007.11.29,
4%D          title=\CONTEXT\ Core Macros,
5%D       subtitle=Line Numbering,
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% generic or not ... maybe not bother too much and simplify to mkiv only
15% get rid of \mk* (left over from experimental times)
16%
17% to be redone (was experiment) .. can be hooked into margin code
18% reshuffle arguments
19%
20% this is early luatex code, 2007 or even before that, and it shows ... we
21% have better tricks now
22
23\writestatus{loading}{ConTeXt Core Macros / Line Numbering}
24
25\unprotect
26
27% todo: save settings
28%
29% low level interface
30%
31% we should use normal counters but then we need to sync settings
32
33% some line
34%
35% \startlocallinenumbering
36% some source code 1\par
37% some source code 2\par
38% some source code 3\par
39% \stoplocallinenumbering
40%
41% some line
42
43\registerctxluafile{page-lin}{}
44
45\definesystemattribute[linenumber]   [public]
46\definesystemattribute[linereference][public]
47
48\appendtoksonce
49    \c_attr_linenumber\attributeunsetvalue
50\to \everyforgetall
51
52\appendtoks
53    \c_attr_linenumber\attributeunsetvalue
54\to \everyinsidefloat
55
56\mutable\let\linenumber\!!zerocount
57
58\newbox     \b_page_lines_scratch
59\newcount   \c_page_lines_reference
60\newconstant\c_page_lines_nesting
61
62\newconditional\tracelinenumbering % we keep this for old times sake
63
64\installtextracker
65  {lines.numbers.show}
66  {\settrue \tracelinenumbering}
67  {\setfalse\tracelinenumbering}
68
69% id nr shift width leftskip dir
70
71\installcorenamespace{linenumberinginstance}
72
73% tag skipflag s getfield(n,"shift") getfield(n,"width") leftmarginwidth(getlist(n)) getfield(n,"dir"))
74
75\let\makelinenumber\gobblefivearguments % used at lua end
76
77\newconditional\page_postprocessors_needed_box
78
79\unexpanded\def\page_postprocessors_linenumbers_page_indeed   #tag{\page_lines_add_numbers_to_box{#tag}\plusone      \plusone   \zerocount}
80\unexpanded\def\page_postprocessors_linenumbers_box_indeed    #tag{\page_lines_add_numbers_to_box{#tag}\plusone      \plusone   \zerocount}
81\unexpanded\def\page_postprocessors_linenumbers_deepbox_indeed#tag{\page_lines_add_numbers_to_box{#tag}\plusone      \plusone   \plusone  }
82\unexpanded\def\page_postprocessors_linenumbers_column_indeed #tag{\page_lines_add_numbers_to_box{#tag}\currentcolumn\nofcolumns\zerocount}
83
84\let\page_postprocessors_linenumbers_page   \gobbleoneargument
85\let\page_postprocessors_linenumbers_box    \gobbleoneargument
86\let\page_postprocessors_linenumbers_deepbox\gobbleoneargument
87\let\page_postprocessors_linenumbers_column \gobbleoneargument
88
89\unexpanded\def\page_postprocessors_linenumbers_check
90  {\glet\page_postprocessors_linenumbers_check  \relax
91   \glet\page_postprocessors_linenumbers_page   \page_postprocessors_linenumbers_page_indeed
92   \glet\page_postprocessors_linenumbers_box    \page_postprocessors_linenumbers_box_indeed
93   \glet\page_postprocessors_linenumbers_deepbox\page_postprocessors_linenumbers_deepbox_indeed
94   \glet\page_postprocessors_linenumbers_column \page_postprocessors_linenumbers_column_indeed}
95
96\def\page_lines_start_define
97  {\setxvalue{\??linenumberinginstance\currentlinenumbering}%
98     {\clf_registerlinenumbering
99        continue {\ifnum\c_page_lines_mode=\zerocount\v!yes\else\v!no\fi}%
100        start    \linenumberingparameter\c!start
101        step     \linenumberingparameter\c!step
102        method   {\linenumberingparameter\c!method}%
103        tag      {\currentlinenumbering}%
104     }}
105
106\def\page_lines_start_update
107  {\clf_setuplinenumbering
108     \csname\??linenumberinginstance\currentlinenumbering\endcsname
109     {%
110        continue {\ifnum\c_page_lines_mode=\zerocount\v!yes\else\v!no\fi}%
111     }%
112   \relax}
113
114\def\page_lines_setup
115  {\ifcsname \??linenumberinginstance\currentlinenumbering\endcsname
116     \clf_setuplinenumbering
117       \lastnamedcs
118       {%
119            continue {\ifnum\c_page_lines_mode=\zerocount\v!yes\else\v!no\fi}%
120            start    \linenumberingparameter\c!start
121            step     \linenumberingparameter\c!step
122            method   {\linenumberingparameter\c!method}%
123            tag      {\currentlinenumbering}%
124       }%
125     \relax
126   \fi}
127
128% we could make this a bit more efficient by putting the end reference
129% in the same table as the start one but why make things complex ...
130
131\unexpanded\def\page_lines_some_reference#1#2#3%
132  {\dontleavehmode\begingroup
133   \global\advance\c_page_lines_reference\plusone
134   \c_attr_linereference\c_page_lines_reference
135   #3% todo: #3{#1} as there is no need to pass #1 as part of #3
136   % for the moment we use a simple system i.e. no prefixes etc .. todo: store as number
137   \c_strc_references_bind_state\zerocount % we don't want the prewordbreak and manage it here
138   \normalexpanded{\strc_references_set_named_reference{line}{#2}{conversion=\linenumberingparameter\c!conversion}{\the\c_page_lines_reference}}% kind labels userdata text
139   \endgroup}
140
141% \def\page_lines_reference_start#1{\page_lines_some_reference{#1}{lr:b:#1}{}} % reimplemented later
142% \def\page_lines_reference_stop #1{\page_lines_some_reference{#1}{lr:e:#1}{}} % reimplemented later
143
144% \def\mklinestartreference#1[#2]{\in{#1}[lr:b:#2]} % not interfaced/ not used
145% \def\mklinestopreference #1[#2]{\in{#1}[lr:e:#2]} % not interfaced/ not used
146
147\newif\ifnumberinglines   % will change
148\newif\iftypesettinglines % will change
149
150\installcorenamespace{linenumbering}
151
152\installcommandhandler \??linenumbering {linenumbering} \??linenumbering
153
154\setnewconstant\c_page_lines_mode     \plusone  % 0=continue, 1=restart
155\setnewconstant\c_page_lines_location \plusone  % 0=middle, 1=left, 2=right, 3=inner, 4=outer, 5=text, 6=begin, 7=end
156\setnewconstant\c_page_lines_alignment\plusfive % 0=middle, 1=left, 2=right, 5=auto
157
158\newdimen\d_page_lines_width
159\newdimen\d_page_lines_distance
160
161\newevery \beforeeverylinenumbering \relax
162\newevery \aftereverylinenumbering  \relax
163\newevery \everylinenumber          \relax
164
165\appendtoks
166   \page_lines_setup
167\to \everysetuplinenumbering
168
169\appendtoks
170   \page_lines_start_define
171\to \everydefinelinenumbering
172
173\setuplinenumbering
174  [\c!conversion=\v!numbers,
175   \c!start=1,
176   \c!step=1,
177   \c!method=\v!first,
178   \c!continue=\v!no,
179   \c!style=,
180   \c!color=,
181   \c!width=2\emwidth,
182   \c!left=,
183   \c!right=,
184   \c!command=,
185   \c!margin=2.5\emwidth,
186   \c!distance=\zeropoint,
187   \c!location=\v!default, % depends on direction, columns etc
188   \c!align=\v!auto]
189
190\definelinenumbering
191  []
192
193% \startlinenumbering[<startvalue>|continue|settings|name]
194% \startlinenumbering[name][<startvalue>|continue|settings]
195
196\unexpanded\def\startlinenumbering
197  {\begingroup
198   \page_postprocessors_linenumbers_check
199   \dodoubleempty\page_lines_start}
200
201\newcount\c_pages_lines_nesting
202
203\def\page_lines_start % we stay downward compatible
204  {\advance\c_pages_lines_nesting\plusone
205   \ifnum\c_pages_lines_nesting>\plusone
206     \expandafter\dodoubleempty\expandafter\gobbletwooptionals
207   \else
208     \expandafter\page_lines_start_indeed
209   \fi}
210
211\def\page_lines_start_indeed
212  {\ifsecondargument
213     \expandafter\page_lines_start_two
214   \else\iffirstargument
215     \doubleexpandafter\page_lines_start_one
216   \else
217     \doubleexpandafter\page_lines_start_zero
218   \fi\fi}
219
220\def\page_lines_start_zero[#1][#2]%
221  {\edef\m_argument{\linenumberingparameter\c!continue}%
222   \ifx\m_argument\v!yes
223     \c_page_lines_mode\zerocount
224   \else
225     \c_page_lines_mode\plusone
226   \fi
227   \page_lines_start_followup}
228
229\def\page_lines_start_one[#1][#2]% [continue|<number>|settings] % historic
230  {\edef\m_argument{#1}%
231   \ifx\m_argument\v!continue
232     \c_page_lines_mode\zerocount
233     \let\currentlinenumbering\empty
234   \else
235     \c_page_lines_mode\plusone
236     \ifx\m_argument\v!empty
237       \let\currentlinenumbering\empty
238     \else
239       \doifelseassignment{#1}
240         {\let\currentlinenumbering\empty
241          \setupcurrentlinenumbering[#1]}
242         {\doifelsenumber\m_argument
243            {\let\currentlinenumbering\empty
244             \letlinenumberingparameter\c!start\m_argument}
245            {\let\currentlinenumbering\m_argument}}%
246     \fi
247     \edef\p_continue{\linenumberingparameter\c!continue}%
248     \ifx\p_continue\v!yes
249       \c_page_lines_mode\zerocount
250     \fi
251   \fi
252   \page_lines_start_followup}
253
254\def\page_lines_start_two[#1][#2]% [tag][continue|<number>|settings]
255  {\edef\currentlinenumbering{#1}%
256   \edef\m_argument{#2}%
257   \ifx\m_argument\v!continue
258     \c_page_lines_mode\zerocount
259   \else
260     \c_page_lines_mode\plusone
261     \ifx\m_argument\v!empty \else
262       \doifelseassignment{#2}
263         {\setupcurrentlinenumbering[#2]}
264         {\doifnumber\m_argument
265            {\letlinenumberingparameter\c!start\m_argument}}%
266     \fi
267     \edef\p_continue{\linenumberingparameter\c!continue}%
268     \ifx\p_continue\v!yes
269       \c_page_lines_mode\zerocount
270     \fi
271   \fi
272   \page_lines_start_followup}
273
274\newconditional\c_page_lines_auto_narrow
275%\newconditional\c_page_lines_enabled
276
277\appendtoks
278    \ifconditional\page_postprocessors_needed_box
279        \page_postprocessors_linenumbers_page\b_page_postprocessor
280    \fi
281\to \t_page_postprocessors_page
282
283\appendtoks
284    \ifconditional\page_postprocessors_needed_box
285        \page_postprocessors_linenumbers_column\b_page_postprocessor
286    \fi
287\to \t_page_postprocessors_column
288
289\def\page_lines_start_followup
290  {\numberinglinestrue
291   \edef\p_location{\linenumberingparameter\c!location}%
292   \setfalse\c_page_lines_auto_narrow
293   \ifhmode \else
294     \ifx\p_location\v!text
295       \ifdim\leftskip>\zeropoint \else
296         \advance\leftskip\linenumberingparameter\c!margin
297         \settrue\c_page_lines_auto_narrow
298       \fi
299     \else\ifx\p_location\v!begin
300       \ifdim\leftskip>\zeropoint \else
301         \advance\leftskip\linenumberingparameter\c!margin
302         \settrue\c_page_lines_auto_narrow
303       \fi
304     \else\ifx\p_location\v!end
305       \ifdim\leftskip>\zeropoint \else
306         \advance\rightskip\linenumberingparameter\c!margin
307         \settrue\c_page_lines_auto_narrow
308       \fi
309     \fi\fi\fi
310   \fi
311   \the\beforeeverylinenumbering
312   %\global\settrue\c_page_lines_enabled           %
313   \global\settrue\page_postprocessors_needed_box % see core-rul.mkiv
314   \ifcase\c_page_lines_mode\relax
315     \page_lines_start_update % continue
316   \or
317     \page_lines_start_define % only when assignment
318   \fi
319   \c_attr_linenumber\csname\??linenumberinginstance\currentlinenumbering\endcsname\relax}
320
321\unexpanded\def\stoplinenumbering
322  {\ifconditional\c_pages_lines_nesting=\plusone
323     \c_attr_linenumber\attributeunsetvalue
324     \the\aftereverylinenumbering
325     \ifconditional\c_page_lines_auto_narrow\par\fi
326   \fi
327   \endgroup}
328
329% number placement .. will change into (the new) margin code
330
331\newconditional\c_page_lines_fake_number
332\newconstant   \b_page_lines_number
333\newconstant   \c_page_lines_column
334\newconstant   \c_page_lines_last_column
335\newdimen      \d_page_lines_line_width
336\settrue       \c_page_lines_dir_left_to_right
337
338\installcorenamespace{linenumberinghandler}
339
340\def\page_line_swap_align % can become a helper
341  {\ifx\p_align\v!inner     \let\p_align\v!outer     \else
342   \ifx\p_align\v!outer     \let\p_align\v!inner     \else
343   \ifx\p_align\v!flushleft \let\p_align\v!flushright\else
344   \ifx\p_align\v!flushright\let\p_align\v!flushleft \else
345   \ifx\p_align\v!left      \let\p_align\v!right     \else
346   \ifx\p_align\v!right     \let\p_align\v!left      \fi\fi\fi\fi\fi\fi}
347
348\let\page_lines_make_number_indeed\relax
349
350% \def\page_lines_rlap{\ifconditional\c_page_lines_dir_left_to_right\expandafter\rlap\else\expandafter\llap\fi}
351% \def\page_lines_llap{\ifconditional\c_page_lines_dir_left_to_right\expandafter\llap\else\expandafter\rlap\fi}
352
353\def\page_lines_add_numbers_to_box#box#column#max#nesting%
354  {\bgroup
355   \ifconditional\c_strc_tags_enabled
356     \strc_tags_enable_indeed
357   \fi
358   \b_page_lines_number     #box\relax
359   \c_page_lines_column     #column\relax
360   \c_page_lines_last_column#max\relax
361   \fullrestoreglobalbodyfont
362   \let\makelinenumber\page_lines_make_number % used at lua end
363   \setbox\b_page_lines_scratch\vbox
364     {\forgetall
365      \offinterlineskip
366      \clf_linenumbersstageone
367        \b_page_lines_number
368        #nesting%
369      \relax}%
370   \clf_linenumbersstagetwo
371     \b_page_lines_number
372     \b_page_lines_scratch
373   \relax
374   \egroup}
375
376\def\page_lines_make_number#tag#mode#linenumber#width#dir% with hang and parindent and skips we have to compensate for \hsize
377  {\naturalhbox to \zeropoint \bgroup
378   \ifcase#mode\relax
379   % \settrue \c_page_lines_fake_number
380   \else
381   % \setfalse\c_page_lines_fake_number
382     \edef\currentlinenumbering{#tag}%
383     \def\linenumber{#linenumber}% unsafe
384     \d_page_lines_line_width#width\scaledpoint\relax
385     \d_page_lines_distance\linenumberingparameter\c!distance\relax
386     \edef\p_align{\linenumberingparameter\c!align}%
387     \edef\p_location{\linenumberingparameter\c!location}%
388     \ifcase#dir\relax
389       \settrue \c_page_lines_dir_left_to_right
390     \else
391       \setfalse\c_page_lines_dir_left_to_right
392     \fi
393     %
394     % maybe we also need an option to ignore columns, so that we renumber
395     % once but on the other hand this assumes aligned lines
396     %
397     \ifcase\c_page_lines_last_column\relax
398       \settrue \c_page_lines_fake_number % why
399     \or
400       % one column
401     \or
402       % two columns
403       \ifx\p_location\v!default % or just margin
404         \ifcase\c_page_lines_column\relax
405           \settrue \c_page_lines_fake_number % why
406         \or
407           % one
408           \let\p_location\v!left
409         \else
410           % two
411           \let\p_location\v!right
412           % can become a helper
413           \page_line_swap_align
414         \fi
415       \fi
416     \else
417       % too fuzzy
418     \fi
419     \ifx\p_location\v!default
420        \ifconditional\c_page_lines_dir_left_to_right
421          \let\p_location\v!left
422        \else
423          \let\p_location\v!right
424          \page_line_swap_align % yes or no
425        \fi
426     \fi
427     %
428     \begincsname\??linenumberinghandler\p_location\endcsname
429   \fi
430   \egroup}
431
432\def\page_lines_number_inject#align#width%
433  {\edef\p_width{\linenumberingparameter\c!width}%
434   \ifx\p_width\v!margin
435     \d_page_lines_width#width%
436   \else
437     \d_page_lines_width\p_width
438   \fi
439   \relax
440   \ifdim\d_page_lines_width>\zeropoint
441%      \ifconditional\c_page_lines_dir_left_to_right\else
442%        \let\simplealignedbox\simplereversealignedbox
443%      \fi
444     \ifconditional\tracelinenumbering
445       \ruledhbox{\simplealignedbox\d_page_lines_width#align{\page_lines_number_inject_indeed}}%
446     \else
447       \simplealignedbox\d_page_lines_width#align{\page_lines_number_inject_indeed}%
448     \fi
449   \else
450     \ifconditional\tracelinenumbering
451       \ruledhbox
452     \else
453     % \hbox
454     \fi
455     {\page_lines_number_inject_indeed}%
456   \fi}
457
458\def\page_lines_number_inject_indeed
459  {\uselinenumberingstyleandcolor\c!style\c!color
460   \linenumberingparameter\c!command
461     {\linenumberingparameter\c!left
462      \convertnumber{\linenumberingparameter\c!conversion}\linenumber
463      \linenumberingparameter\c!right}}
464
465% \def\dodorlap{\hbox to \zeropoint{\box\nextbox\normalhss}\endgroup}
466% \def\dodollap{\hbox to \zeropoint{\normalhss\box\nextbox}\endgroup}
467
468\def\page_line_handle_left#align#width#distance%
469  {\dostarttagged\t!linenumber\empty
470   \llap
471     {\page_lines_number_inject#align#width%
472      \dostarttagged\t!ignore\empty
473      \kern\dimexpr
474        #distance+\d_page_lines_distance
475        \ifconditional\c_page_lines_dir_left_to_right\else+\d_page_lines_line_width\fi
476      \relax
477      \the\everylinenumber
478      \hss
479      \dostoptagged}%
480   \dostoptagged}
481
482\def\page_line_handle_right#align#width#distance%
483  {\dostarttagged\t!linenumber\empty
484   \rlap
485     {\dostarttagged\t!ignore\empty
486      \kern\dimexpr
487        #distance+\d_page_lines_distance
488        \ifconditional\c_page_lines_dir_left_to_right+\d_page_lines_line_width\fi
489      \relax
490      \dostoptagged
491      \page_lines_number_inject#align#width%
492      \dostarttagged\t!ignore\empty
493      \the\everylinenumber
494      \hss
495      \dostoptagged}%
496   \dostoptagged}
497
498\setuvalue{\??linenumberinghandler\v!left}%
499  {\page_line_handle_left\p_align\leftmarginwidth\leftmargindistance}
500
501\setuvalue{\??linenumberinghandler\v!right}%
502  {\page_line_handle_right\p_align\rightmarginwidth\rightmargindistance}
503
504\setuvalue{\??linenumberinghandler\v!inner}%
505  {\ifodd\realpageno
506     \ifx\p_align\v!inner
507       \page_line_handle_left\v!flushleft\leftmarginwidth\leftmargindistance
508     \else\ifx\p_align\v!outer
509       \page_line_handle_left\v!flushright\leftmarginwidth\leftmargindistance
510     \else
511       \page_line_handle_left\p_align\leftmarginwidth\leftmargindistance
512     \fi\fi
513   \else
514     \ifx\p_align\v!inner
515       \page_line_handle_right\v!flushright\rightmarginwidth\rightmargindistance
516     \else\ifx\p_align\v!outer
517       \page_line_handle_right\v!flushleft\rightmarginwidth\rightmargindistance
518     \else
519       \page_line_handle_right\p_align\rightmarginwidth\rightmargindistance
520     \fi\fi
521   \fi}
522
523\setuvalue{\??linenumberinghandler\v!outer}%
524  {\ifodd\realpageno
525     \ifx\p_align\v!inner
526       \page_line_handle_right\v!flushleft\leftmarginwidth\leftmargindistance
527     \else\ifx\p_align\v!outer
528       \page_line_handle_right\v!flushright\leftmarginwidth\leftmargindistance
529     \else
530       \page_line_handle_right\p_align\leftmarginwidth\leftmargindistance
531     \fi\fi
532   \else
533     \ifx\p_align\v!inner
534       \page_line_handle_left\v!flushright\rightmarginwidth\rightmargindistance
535     \else\ifx\p_align\v!outer
536       \page_line_handle_left\v!flushleft\rightmarginwidth\rightmargindistance
537     \else
538       \page_line_handle_left\p_align\rightmarginwidth\rightmargindistance
539     \fi\fi
540   \fi}
541
542\def\page_line_handle_begin#align%
543  {\rlap
544     {\kern\d_page_lines_distance
545      \page_lines_number_inject#align\zeropoint
546      \the\everylinenumber}}
547
548\def\page_line_handle_end#align%
549  {\rlap
550     {\kern\d_page_lines_line_width\relax
551      \llap
552        {\page_lines_number_inject#align\zeropoint
553         \kern\d_page_lines_distance
554         \the\everylinenumber}}}
555
556\setuvalue{\??linenumberinghandler\v!begin}{\page_line_handle_begin\p_align}
557\setuvalue{\??linenumberinghandler\v!end  }{\page_line_handle_end  \p_align}
558\setuvalue{\??linenumberinghandler\v!text }{\page_line_handle_begin\p_align}
559
560\expandafter\let\csname\??linenumberinghandler\v!inleft  \expandafter\endcsname\csname\??linenumberinghandler\v!left \endcsname
561\expandafter\let\csname\??linenumberinghandler\v!inmargin\expandafter\endcsname\csname\??linenumberinghandler\v!left \endcsname
562\expandafter\let\csname\??linenumberinghandler\v!margin  \expandafter\endcsname\csname\??linenumberinghandler\v!left \endcsname
563\expandafter\let\csname\??linenumberinghandler\v!inright \expandafter\endcsname\csname\??linenumberinghandler\v!right\endcsname
564
565% referencing: \permithyphenation, also removes leading spaces (new per 29-11-2013)
566
567\unexpanded\def\someline [#1]{\page_lines_reference_start{#1}\page_lines_reference_stop{#1}} % was just a def
568%unexpanded\def\startline[#1]{\page_lines_reference_start{#1}\ignorespaces}
569\unexpanded\def\startline[#1]{\page_lines_reference_start{#1}\permithyphenation\ignorespaces} %okay?
570\unexpanded\def\stopline [#1]{\removeunwantedspaces\permithyphenation\page_lines_reference_stop{#1}}
571
572\def\page_lines_reference_show_start
573  {\ifconditional\tracelinenumbering
574     \expandafter\page_lines_reference_show_start_indeed
575   \else
576     \expandafter\gobbleoneargument
577   \fi}
578
579\def\page_lines_reference_show_stop
580  {\ifconditional\tracelinenumbering
581     \expandafter\page_lines_reference_show_stop_indeed
582   \else
583     \expandafter\gobbleoneargument
584   \fi}
585
586\def\page_lines_reference_show_start_indeed#1%
587  {\setbox\scratchbox\hpack{\llap
588     {\vrule\s!width\onepoint\s!depth\strutdp\s!height.8\strutht\raise.85\strutht\hpack{\llap{\tt\txx#1}}}}%
589   \smashbox\scratchbox
590   \box\scratchbox}
591
592\def\page_lines_reference_show_stop_indeed#1%
593  {\setbox\scratchbox\hpack{\rlap
594     {\raise.85\strutht\hpack{\rlap{\tt\txx#1}}\vrule\s!width\onepoint\s!depth\strutdp\s!height.8\strutht}}%
595   \smashbox\scratchbox
596   \box\scratchbox}
597
598\def\page_lines_reference_start#1{\page_lines_some_reference{#1}{lr:b:#1}{\page_lines_reference_show_start{#1}}}
599\def\page_lines_reference_stop #1{\page_lines_some_reference{#1}{lr:e:#1}{\page_lines_reference_show_stop {#1}}}
600
601% eventually we will do this in lua
602
603\def\currentreferencelinenumber{\clf_filterreference{linenumber}}
604
605\let\m_page_lines_from\empty
606\let\m_page_lines_to  \empty
607
608\unexpanded\def\doifelsesamelinereference#1#2#3%
609  {\doifelsereferencefound{lr:b:#1}
610     {\edef\m_page_lines_from{\currentreferencelinenumber}%
611      \doifelsereferencefound{lr:e:#1}
612        {\edef\m_page_lines_to{\currentreferencelinenumber}%
613         %[\m_page_lines_from,\m_page_lines_to]
614         \ifx\m_page_lines_from\m_page_lines_to#2\else#3\fi}
615        {#2}}
616     {#2}}
617
618\let\doifsamelinereferenceelse\doifelsesamelinereference
619
620\unexpanded\def\inline#1[#2]%
621  {\doifelsenothing{#1}
622     {\doifelsesamelinereference{#2}
623        {\in{\leftlabeltext\v!line}{\rightlabeltext\v!line}[lr:b:#2]}
624        {\in{\leftlabeltext\v!lines}{}[lr:b:#2]--\in{}{\rightlabeltext\v!lines}[lr:e:#2]}}
625     {\doifelsesamelinereference{#2}
626        {\in{#1}[lr:b:#2]}
627        {\in{#1}[lr:b:#2]--\in[lr:e:#2]}}}
628
629\unexpanded\def\inlinerange[#1]%
630  {\doifelsesamelinereference{#1}
631     {\in[lr:b:#1]}
632     {\in[lr:b:#1]\endash\in[lr:e:#1]}}
633
634\protect \endinput
635