Import mdocml-1.12.3
[dragonfly.git] / contrib / mdocml / TODO
CommitLineData
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1************************************************************************
2* Official mandoc TODO.
7888c61d 3* $Id: TODO,v 1.162 2013/12/25 14:40:34 schwarze Exp $
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4************************************************************************
5
6************************************************************************
f88b6c16 7* crashes
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8************************************************************************
9
7888c61d 10None known.
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11
12************************************************************************
13* missing features
14************************************************************************
15
16--- missing roff features ----------------------------------------------
17
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18- roff.c should treat \n(.H>23 and \n(.V>19 in the pod2man(1)
19 preamble as true, see for example AUTHORS in MooseX::Getopt.3p
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20 reported by Andreas Voegele <mail at andreasvoegele dot com>
21 Tue, 22 Nov 2011 15:34:47 +0100 on ports@
22
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23- .ad (adjust margins)
24 .ad l -- adjust left margin only (flush left)
25 .ad r -- adjust right margin only (flush right)
26 .ad c -- center text on line
27 .ad b -- adjust both margins (alias: .ad n)
28 .na -- temporarily disable adjustment without changing the mode
29 .ad -- re-enable adjustment without changing the mode
30 Adjustment mode is ignored while in no-fill mode (.nf).
31
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32- .as (append to string)
33 found by jca@ in ratpoison(1) Sun, 30 Jun 2013 12:01:09 +0200
34
35- .ce (center N lines)
36 found by naddy@ in xloadimage(1)
37 found by Juan Francisco Cantero Hurtado <iam at juanfra dot info>
38 in lang/racket(1) Thu, 20 Jun 2013 03:19:11 +0200
39
40- .fc (field control)
41 found by naddy@ in xloadimage(1)
42
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43- .ll (line length)
44 found by naddy@ in textproc/enchant(1) Sat, 12 Oct 2013 03:27:10 +0200
45
46- .nr third argument (auto-increment step size, requires \n+)
47 found by bentley@ in sbcl(1) Mon, 9 Dec 2013 18:36:57 -0700
48
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49- .ns (no-space mode) occurs in xine-config(1)
50 reported by brad@ Sat, 15 Jan 2011 15:45:23 -0500
51
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52- .ta (tab settings) occurs in ircbug(1) and probably gnats(1)
53 reported by brad@ Sat, 15 Jan 2011 15:50:51 -0500
54
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55- .ti (temporary indent)
56 found by naddy@ in xloadimage(1)
57 found by bentley@ in nmh(1) Mon, 23 Apr 2012 13:38:28 -0600
58
59- .while and .shift
60 found by jca@ in ratpoison(1) Sun, 30 Jun 2013 12:01:09 +0200
61
62- \c (interrupted text) should prevent the line break
63 even inside .Bd literal; that occurs in chat(8)
64 also found in cclive(1) - DocBook output
65
66- \h horizontal move
67 found in cclive(1) DocBook output
68 Anthony J. Bentley on discuss@ Sat, 21 Sep 2013 22:29:34 -0600
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70- \n+ and \n- numerical register increment and decrement
71 found by bentley@ in sbcl(1) Mon, 9 Dec 2013 18:36:57 -0700
72
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73- using undefined strings or macros defines them to be empty
74 wl@ Mon, 14 Nov 2011 14:37:01 +0000
75
76--- missing mdoc features ----------------------------------------------
77
78- fix bad block nesting involving multiple identical explicit blocks
79 see the OpenBSD mdoc_macro.c 1.47 commit message
80
81- .Bl -column .Xo support is missing
82 ultimate goal:
83 restore .Xr and .Dv to
84 lib/libc/compat-43/sigvec.3
85 lib/libc/gen/signal.3
86 lib/libc/sys/sigaction.2
87
88- edge case: decide how to deal with blk_full bad nesting, e.g.
89 .Sh .Nm .Bk .Nm .Ek .Sh found by jmc@ in ssh-keygen(1)
90 from jmc@ Wed, 14 Jul 2010 18:10:32 +0100
91
92- \\ is now implemented correctly
93 * when defining strings and macros using .ds and .de
94 * when parsing roff(7) and man(7) macro arguments
95 It does not yet work in mdoc(7) macro arguments
96 because libmdoc does not yet use mandoc_getarg().
97 Also check what happens in plain text, it must be identical to \e.
98
99- .Bd -filled should not be the same as .Bd -ragged, but align both
100 the left and right margin. In groff, it is implemented in terms
101 of .ad b, which we don't have either. Found in cksum(1).
102
103- implement blank `Bl -column', such as
104 .Bl -column
105 .It foo Ta bar
106 .El
107
108- explicitly disallow nested `Bl -column', which would clobber internal
109 flags defined for struct mdoc_macro
110
111- In .Bl -column .It, the end of the line probably has to be regarded
112 as an implicit .Ta, if there could be one, see the following mildly
113 ugly code from login.conf(5):
114 .Bl -column minpasswordlen program xetcxmotd
115 .It path Ta path Ta value of Dv _PATH_DEFPATH
116 .br
117 Default search path.
118 reported by Michal Mazurek <akfaew at jasminek dot net>
119 via jmc@ Thu, 7 Apr 2011 16:00:53 +0059
120
121- inside `.Bl -column' phrases, punctuation is handled like normal
122 text, e.g. `.Bl -column .It Fl x . Ta ...' should give "-x -."
123
124- inside `.Bl -column' phrases, TERMP_IGNDELIM handling by `Pf'
125 is not safe, e.g. `.Bl -column .It Pf a b .' gives "ab."
126 but should give "ab ."
127
128- set a meaningful default if no `Bl' list type is assigned
129
130- have a blank `It' head for `Bl -tag' not puke
131
132- prohibit `Nm' from having non-text HEAD children
133 (e.g., NetBSD mDNSShared/dns-sd.1)
134 (mdoc_html.c and mdoc_term.c `Nm' handlers can be slightly simplified)
135
136- When there is free text in the SYNOPSIS and that free text contains
137 the .Nm macro, groff somehow understands to treat the .Nm as an in-line
138 macro, while mandoc treats it as a block macro and breaks the line.
139 No idea how the logic for distinguishing in-line and block instances
140 should be, needs investigation.
141 uqs@ Thu, 2 Jun 2011 11:03:51 +0200
142 uqs@ Thu, 2 Jun 2011 11:33:35 +0200
143
144--- missing man features -----------------------------------------------
145
146- groff an-ext.tmac macros (.UR, .UE) occur in xine(5)
147 reported by brad@ Sat, 15 Jan 2011 15:45:23 -0500
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148 also occur in freeciv-client(6) freeciv-server(6) freeciv-modpack(6)
149 reported by bentley@ Tue, 30 Oct 2012 01:05:57 -0600
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150
151- -T[x]html doesn't stipulate non-collapsing spaces in literal mode
152
153--- missing tbl features -----------------------------------------------
154
155- implement basic non-parametric .de to support e.g. sox(1)
156 reported by naddy@ Sat, 16 Oct 2010 23:51:57 +0200
157 *** sox(1) still doesn't work, tbl(1) errors need investigation
158
159- allow standalone `.' to be interpreted as an end-of-layout
160 delimiter instead of being thrown away as a no-op roff line
161 reported by Yuri Pankov, Wed 18 May 2011 11:34:59 CEST
162
163--- missing misc features ----------------------------------------------
164
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165- italic correction (\/) in PostScript mode
166 Werner LEMBERG on groff at gnu dot org Sun, 10 Nov 2013 12:47:46
167
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168- The whatis(1) utility looks for whole words in Nm.
169 If the file name of a page does not agree with the contents of any
170 of its Nm macros (e.g. pool(9)), add the file name as an Nm entry
171 to the mandoc.db as well, such that whatis(1) finds it.
172 If there is a page with a file name that does not appear as a substring
173 neither in Nm nor in Nd, the same fix would allow finding that page
174 with apropos(1) using the file name as a key, as well.
175 Issue reported by tedu@ Fri, 05 Jul 2013 21:15:23 -0400
176
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177- clean up escape sequence handling, creating three classes:
178 (1) fully implemented, or parsed and ignored without loss of content
179 (2) unimplemented, potentially causing loss of content
180 or serious mangling of formatting (e.g. \n) -> ERROR
181 see textproc/mgdiff(1) for nice examples
182 (3) undefined, just output the character -> perhaps WARNING
183
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184- look at pages generated from reStructeredText, e.g. devel/mercurial hg(1)
185 These are a weird mixture of man(7) and custom autogenerated low-level
186 roff stuff. Figure out to what extent we can cope.
187 For details, see http://docutils.sourceforge.net/rst.html
188 noted by stsp@ Sat, 24 Apr 2010 09:17:55 +0200
189 reminded by nicm@ Mon, 3 May 2010 09:52:41 +0100
190
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191- look at pages generated from Texinfo source by yat2m, e.g. security/gnupg
192 First impression is not that bad.
193
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194- check compatibility with Plan9:
195 http://swtch.com/usr/local/plan9/tmac/tmac.an
196 http://swtch.com/plan9port/man/man7/man.html
197 "Anthony J. Bentley" <anthonyjbentley@gmail.com> 28 Dec 2010 21:58:40 -0700
198
199************************************************************************
200* formatting issues: ugly output
201************************************************************************
202
203- a column list with blank `Ta' cells triggers a spurrious
204 start-with-whitespace printing of a newline
205
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206- In .Bl -column,
207 .It Em Authentication<tab>Key Length
208 ought to render "Key Length" with emphasis, too,
209 see OpenBSD iked.conf(5).
210 reported again Nicolas Joly via wiz@ Wed, 12 Oct 2011 00:20:00 +0200
211
212- empty phrases in .Bl column produce too few blanks
213 try e.g. .Bl -column It Ta Ta
214 reported by millert Fri, 02 Apr 2010 16:13:46 -0400
215
216- .%T can have trailing punctuation. Currently, it puts the trailing
217 punctuation into a trailing MDOC_TEXT element inside its own scope.
218 That element should rather be outside its scope, such that the
219 punctuation does not get underlines. This is not trivial to
220 implement because .%T then needs some features of in_line_eoln() -
221 slurp all arguments into one single text element - and one feature
222 of in_line() - put trailing punctuation out of scope.
223 Found in mount_nfs(8) and exports(5), search for "Appendix".
224
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225- Trailing punctuation after .%T triggers EOS spacing, at least
226 outside .Rs (eek!). Simply setting ARGSFL_DELIM for .%T is not
227 the right solution, it sends mandoc into an endless loop.
228 reported by Nicolas Joly Sat, 17 Nov 2012 11:49:54 +0100
229
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230- in enclosures, mandoc sometimes fancies a bogus end of sentence
231 reminded by jmc@ Thu, 23 Sep 2010 18:13:39 +0059
232
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233- formatting /usr/local/man/man1/latex2man.1 with groff and mandoc
234 reveals lots of bugs both in groff and mandoc...
235 reported by bentley@ Wed, 22 May 2013 23:49:30 -0600
236
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237************************************************************************
238* formatting issues: gratuitous differences
239************************************************************************
240
241- .Rv (and probably .Ex) print different text if an `Nm' has been named
242 or not (run a manual without `Nm blah' to see this). I'm not sure
243 that this exists in the wild, but it's still an error.
244
245- In .Bl -bullet, the groff bullet is "+\b+\bo\bo", the mandoc bullet
246 is just "o\bo".
247 see for example OpenBSD ksh(1)
248
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249- .Pp between two .It in .Bl -column should produce one,
250 not two blank lines, see e.g. login.conf(5).
251 reported by jmc@ Sun, 17 Apr 2011 14:04:58 +0059
252 reported again by sthen@ Wed, 18 Jan 2012 02:09:39 +0000 (UTC)
253
254- If the *first* line after .It is .Pp, break the line right after
255 the tag, do not pad with space characters before breaking.
256 See the description of the a, c, and i commands in sed(1).
257
258- If the first line after .It is .D1, do not assert a blank line
259 in between, see for example tmux(1).
260 reported by nicm@ 13 Jan 2011 00:18:57 +0000
261
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262- Trailing punctuation after .It should trigger EOS spacing.
263 reported by Nicolas Joly Sat, 17 Nov 2012 11:49:54 +0100
264 Probably, this should be fixed somewhere in termp_it_pre(), not sure.
265
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266- .Nx 1.0a
267 should be "NetBSD 1.0A", not "NetBSD 1.0a",
268 see OpenBSD ccdconfig(8).
269
270- In .Bl -tag, if a tag exceeds the right margin and must be continued
271 on the next line, it must be indented by -width, not width+1;
272 see "rule block|pass" in OpenBSD ifconfig(8).
273
274- When the -width string contains macros, the macros must be rendered
275 before measuring the width, for example
276 .Bl -tag -width ".Dv message"
277 in magic(5), located in src/usr.bin/file, is the same
278 as -width 7n, not -width 11n.
279 The same applies to .Bl -column column widths;
280 reported again by Nicolas Joly Thu, 1 Mar 2012 13:41:26 +0100 via wiz@ 5 Mar
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281 reported again by Franco Fichtner Fri, 27 Sep 2013 21:02:28 +0200
282 An easy partial fix would be to just skip the first word if it starts
283 with a dot, including any following white space, when measuring.
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284
285- The \& zero-width character counts as output.
286 That is, when it is alone on a line between two .Pp,
287 we want three blank lines, not two as in mandoc.
288
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289- Header lines of excessive length:
290 Port OpenBSD man_term.c rev. 1.25 to mdoc_term.c
291 and document it in mdoc(7) and man(7) COMPATIBILITY
292 found while talking to Chris Bennett
293
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294- trailing whitespace must be ignored even when followed by a font escape,
295 see for example
296 makes
297 \fBdig \fR
298 operate in batch mode
299 in dig(1).
300
301************************************************************************
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302* performance issues
303************************************************************************
304
305Several areas can be cleaned up to make mandoc even faster. These are
306
307- improve hashing mechanism for macros (quite important: performance)
308
309- improve hashing mechanism for characters (not as important)
310
311- the PDF file is HUGE: this can be reduced by using relative offsets
312
313- instead of re-initialising the roff predefined-strings set before each
314 parse, create a read-only version the first time and copy it
315
316************************************************************************
317* structural issues
318************************************************************************
319
320- We use the input line number at several places to distinguish
321 same-line from different-line input. That plainly doesn't work
322 with user-defined macros, leading to random breakage.
323
324- Find better ways to prevent endless loops
325 in roff(7) macro and string expansion.
326
327- Finish cleanup of date handling.
328 Decide which formats should be recognized where.
329 Update both mdoc(7) and man(7) documentation.
330 Triggered by Tim van der Molen Tue, 22 Feb 2011 20:30:45 +0100