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Annotation of mandoc/TODO, Revision 1.199

1.1       kristaps    1: ************************************************************************
1.37      kristaps    2: * Official mandoc TODO.
1.199   ! schwarze    3: * $Id: TODO,v 1.198 2015/02/10 08:05:30 schwarze Exp $
1.27      kristaps    4: ************************************************************************
1.145     schwarze    5:
1.184     schwarze    6: Many issues are annotated for difficulty as follows:
                      7:
                      8:  - loc = locality of the issue
                      9:     *    single file issue, affects file only, or very few
                     10:     **   single module issue, affects several files of one module
                     11:     ***  cross-module issue, significantly impacts multiple modules
                     12:          and may require substantial changes to internal interfaces
                     13:  - exist = difficulty of the existing code in this area
                     14:     *    affected code is straightforward and easy to read and change
                     15:     **   affected code is somewhat complex, but once you understand
                     16:          the design, not particularly difficult to understand
                     17:     ***  affected code uses a special, exceptionally tricky design
                     18:  - algo = difficulty of the new algorithm to be written
                     19:     *    the required logic and code is straightforward
                     20:     **   the required logic is somewhat complex and needs a careful design
                     21:     ***  the required logic is exceptionally tricky,
                     22:          maybe an approach to solve that is not even known yet
                     23:  - size = the amount of code to be written or changed
                     24:     *    a small number of lines (at most 100, usually much less)
                     25:     **   a considerable amount of code (several dozen to a few hundred)
                     26:     ***  a large amount of code (many hundreds, maybe thousands)
                     27:  - imp = importance of the issue
                     28:     *    mostly for completeness
                     29:     **   would be nice to have
                     30:     ***  issue causes considerable inconvenience
                     31:
                     32: Obviously, as the issues have not been solved yet, these annotations
                     33: are mere guesses, and some may be wrong.
                     34:
1.145     schwarze   35: ************************************************************************
                     36: * crashes
                     37: ************************************************************************
                     38:
1.169     schwarze   39: - The abort() in bufcat(), html.c, can be triggered via buffmt_includes()
                     40:   by running -Thtml -Oincludes on a file containing a long .In argument.
                     41:   Fixing this will probably require reworking the whole bufcat() concept.
1.184     schwarze   42:   loc **  exist *  algo *  size **  imp **
1.101     schwarze   43:
1.61      schwarze   44: ************************************************************************
1.1       kristaps   45: * missing features
                     46: ************************************************************************
1.70      kristaps   47:
1.79      schwarze   48: --- missing roff features ----------------------------------------------
                     49:
1.82      schwarze   50: - .ad (adjust margins)
                     51:   .ad l -- adjust left margin only (flush left)
                     52:   .ad r -- adjust right margin only (flush right)
                     53:   .ad c -- center text on line
                     54:   .ad b -- adjust both margins (alias: .ad n)
                     55:   .na   -- temporarily disable adjustment without changing the mode
                     56:   .ad   -- re-enable adjustment without changing the mode
                     57:   Adjustment mode is ignored while in no-fill mode (.nf).
1.184     schwarze   58:   loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
1.150     schwarze   59:
                     60: - .fc (field control)
                     61:   found by naddy@ in xloadimage(1)
1.184     schwarze   62:   loc **  exist ***  algo *  size *  imp *
1.198     schwarze   63:
1.160     schwarze   64: - .nr third argument (auto-increment step size, requires \n+)
                     65:   found by bentley@ in sbcl(1)  Mon, 9 Dec 2013 18:36:57 -0700
1.184     schwarze   66:   loc *  exist *  algo *  size *  imp **
1.160     schwarze   67:
1.80      schwarze   68: - .ns (no-space mode) occurs in xine-config(1)
                     69:   reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500
1.184     schwarze   70:   loc ***  exist ***  algo ***  size **  imp *
1.61      schwarze   71:
1.81      schwarze   72: - .ta (tab settings) occurs in ircbug(1) and probably gnats(1)
                     73:   reported by brad@  Sat, 15 Jan 2011 15:50:51 -0500
1.167     schwarze   74:   also Tcl_NewStringObj(3) via wiz@  Wed, 5 Mar 2014 22:27:43 +0100
1.191     schwarze   75:   also posix2time(3) Carsten Kunze  Mon, 1 Dec 2014 13:03:10 +0100
                     76:   loc **  exist ***  algo **  size **  imp ***
1.150     schwarze   77:
                     78: - .ti (temporary indent)
1.197     schwarze   79:   found by naddy@ in xloadimage(1) [devel/libvstr] vstr(3)
1.150     schwarze   80:   found by bentley@ in nmh(1)  Mon, 23 Apr 2012 13:38:28 -0600
1.184     schwarze   81:   loc **  exist **  algo **  size *  imp ** (parser reorg helps a lot)
1.154     schwarze   82:
1.198     schwarze   83: - .while and .shift
1.154     schwarze   84:   found by jca@ in ratpoison(1)  Sun, 30 Jun 2013 12:01:09 +0200
1.184     schwarze   85:   loc *  exist **  algo **  size **  imp **
1.155     schwarze   86:
                     87: - \h horizontal move
1.194     schwarze   88:   found in cclive(1) and nasm(1) asciidoc/DocBook output
                     89:   bentley@ on discuss@  Sat, 21 Sep 2013 22:29:34 -0600
                     90:   naddy@  Thu, 4 Dec 2014 16:26:41 +0100
1.184     schwarze   91:   loc **  exist **  algo **  size *  imp ** (parser reorg helps a lot)
1.125     schwarze   92:
1.160     schwarze   93: - \n+ and \n- numerical register increment and decrement
                     94:   found by bentley@ in sbcl(1)  Mon, 9 Dec 2013 18:36:57 -0700
1.184     schwarze   95:   loc *  exist *  algo *  size *  imp **
1.160     schwarze   96:
1.184     schwarze   97: - \w'' improve width measurements
1.167     schwarze   98:   would not be very useful without an expression parser, see below
                     99:   needed for Tcl_NewStringObj(3) via wiz@  Wed, 5 Mar 2014 22:27:43 +0100
1.184     schwarze  100:   loc **  exist ***  algo ***  size *  imp ***
1.167     schwarze  101:
1.125     schwarze  102: - using undefined strings or macros defines them to be empty
                    103:   wl@  Mon, 14 Nov 2011 14:37:01 +0000
1.184     schwarze  104:   loc *  exist *  algo *  size *  imp *
1.167     schwarze  105:
1.79      schwarze  106: --- missing mdoc features ----------------------------------------------
1.18      schwarze  107:
1.1       kristaps  108: - .Bl -column .Xo support is missing
                    109:   ultimate goal:
                    110:   restore .Xr and .Dv to
                    111:   lib/libc/compat-43/sigvec.3
                    112:   lib/libc/gen/signal.3
                    113:   lib/libc/sys/sigaction.2
1.184     schwarze  114:   loc *  exist ***  algo ***  size *  imp **
1.1       kristaps  115:
1.28      schwarze  116: - edge case: decide how to deal with blk_full bad nesting, e.g.
                    117:   .Sh .Nm .Bk .Nm .Ek .Sh found by jmc@ in ssh-keygen(1)
                    118:   from jmc@  Wed, 14 Jul 2010 18:10:32 +0100
1.184     schwarze  119:   loc *  exist ***  algo ***  size **  imp **
1.28      schwarze  120:
1.174     schwarze  121: - .Bd -centered implies -filled, not -unfilled, which is not
                    122:   easy to implement; it requires code similar to .ce, which
                    123:   we don't have either.
                    124:   Besides, groff has bug causing text right *before* .Bd -centered
                    125:   to be centered as well.
1.184     schwarze  126:   loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
1.174     schwarze  127:
1.82      schwarze  128: - .Bd -filled should not be the same as .Bd -ragged, but align both
                    129:   the left and right margin.  In groff, it is implemented in terms
                    130:   of .ad b, which we don't have either.  Found in cksum(1).
1.184     schwarze  131:   loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
1.22      schwarze  132:
1.10      kristaps  133: - implement blank `Bl -column', such as
                    134:   .Bl -column
                    135:   .It foo Ta bar
                    136:   .El
1.184     schwarze  137:   loc *  exist ***  algo ***  size *  imp *
1.11      kristaps  138:
                    139: - explicitly disallow nested `Bl -column', which would clobber internal
                    140:   flags defined for struct mdoc_macro
1.184     schwarze  141:   loc *  exist *  algo *  size *  imp **
1.102     schwarze  142:
                    143: - In .Bl -column .It, the end of the line probably has to be regarded
                    144:   as an implicit .Ta, if there could be one, see the following mildly
                    145:   ugly code from login.conf(5):
                    146:     .Bl -column minpasswordlen program xetcxmotd
                    147:     .It path Ta path Ta value of Dv _PATH_DEFPATH
                    148:     .br
                    149:     Default search path.
                    150:   reported by Michal Mazurek <akfaew at jasminek dot net>
                    151:   via jmc@ Thu, 7 Apr 2011 16:00:53 +0059
1.184     schwarze  152:   loc *  exist ***  algo **  size *  imp **
1.42      schwarze  153:
                    154: - inside `.Bl -column' phrases, punctuation is handled like normal
                    155:   text, e.g. `.Bl -column .It Fl x . Ta ...' should give "-x -."
                    156:
                    157: - inside `.Bl -column' phrases, TERMP_IGNDELIM handling by `Pf'
                    158:   is not safe, e.g. `.Bl -column .It Pf a b .' gives "ab."
                    159:   but should give "ab ."
1.12      kristaps  160:
1.174     schwarze  161: - check whether it is correct that `D1' uses INDENT+1;
                    162:   does it need its own constant?
1.184     schwarze  163:   loc *  exist **  algo **  size *  imp **
1.174     schwarze  164:
1.20      kristaps  165: - prohibit `Nm' from having non-text HEAD children
                    166:   (e.g., NetBSD mDNSShared/dns-sd.1)
                    167:   (mdoc_html.c and mdoc_term.c `Nm' handlers can be slightly simplified)
1.109     schwarze  168:
1.174     schwarze  169: - support translated section names
                    170:   e.g. x11/scrotwm scrotwm_es.1:21:2: error: NAME section must be first
                    171:   that one uses NOMBRE because it is spanish...
                    172:   deraadt tends to think that section-dependent macro behaviour
                    173:   is a bad idea in the first place, so this may be irrelevant
1.184     schwarze  174:   loc **  exist **  algo **  size *  imp **
1.174     schwarze  175:
1.109     schwarze  176: - When there is free text in the SYNOPSIS and that free text contains
                    177:   the .Nm macro, groff somehow understands to treat the .Nm as an in-line
                    178:   macro, while mandoc treats it as a block macro and breaks the line.
                    179:   No idea how the logic for distinguishing in-line and block instances
                    180:   should be, needs investigation.
                    181:   uqs@  Thu, 2 Jun 2011 11:03:51 +0200
                    182:   uqs@  Thu, 2 Jun 2011 11:33:35 +0200
1.184     schwarze  183:   loc *  exist **  algo ***  size *  imp **
1.57      kristaps  184:
1.79      schwarze  185: --- missing man features -----------------------------------------------
                    186:
1.119     kristaps  187: - -T[x]html doesn't stipulate non-collapsing spaces in literal mode
1.80      schwarze  188:
1.79      schwarze  189: --- missing tbl features -----------------------------------------------
                    190:
1.171     schwarze  191: - look at the POSIX manuals in the books/man-pages-posix port,
                    192:   they use some unsupported tbl(7) features.
1.184     schwarze  193:   loc *  exist **  algo **  size **  imp ***
1.171     schwarze  194:
1.183     schwarze  195: - use Unicode U+2500 to U+256C for table borders
                    196:   in tbl(7) -Tutf-8 output
                    197:   suggested by bentley@  Tue, 14 Oct 2014 04:10:55 -0600
1.184     schwarze  198:   loc *  exist **  algo *  size *  imp **
1.105     kristaps  199:
                    200: - allow standalone `.' to be interpreted as an end-of-layout
                    201:   delimiter instead of being thrown away as a no-op roff line
                    202:   reported by Yuri Pankov, Wed 18 May 2011 11:34:59 CEST
1.184     schwarze  203:   loc **  exist **  algo **  size *  imp **
1.79      schwarze  204:
1.182     schwarze  205: --- missing eqn features -----------------------------------------------
                    206:
                    207: - The "size" keyword is parsed, but ignored by the formatter.
1.184     schwarze  208:   loc *  exist *  algo *  size *  imp *
1.182     schwarze  209:
                    210: - The spacing characters `~', `^', and tab are currently ignored,
                    211:   see User's Guide (Second Edition) page 2 section 4.
1.184     schwarze  212:   loc *  exist *  algo **  size *  imp **
1.182     schwarze  213:
                    214: - Mark and lineup are parsed and ignored,
                    215:   see User's Guide (Second Edition) page 5 section 15.
1.184     schwarze  216:   loc **  exist **  algo **  size **  imp **
1.182     schwarze  217:
1.79      schwarze  218: --- missing misc features ----------------------------------------------
1.159     schwarze  219:
                    220: - italic correction (\/) in PostScript mode
                    221:   Werner LEMBERG on groff at gnu dot org  Sun, 10 Nov 2013 12:47:46
1.184     schwarze  222:   loc **  exist **  algo *  size *  imp *
1.153     schwarze  223:
1.173     schwarze  224: - When makewhatis(8) encounters a FATAL parse error,
                    225:   it silently treats the file as formatted, which makes no sense
                    226:   at all for paths like man1/foo.1 - and which also contradicts
                    227:   what the manual says at the end of the description.
                    228:   The end result will be ENOENT for file names returned
                    229:   by mansearch() in manpage.file.
1.184     schwarze  230:   loc *  exist *  algo *  size *  imp **
1.173     schwarze  231:
1.171     schwarze  232: - makewhatis(8) for preformatted pages:
                    233:   parse the section number from the header line
                    234:   and compare to the section number from the directory name
1.184     schwarze  235:   loc *  exist *  algo *  size *  imp **
1.171     schwarze  236:
                    237: - Does makewhatis(8) detect missing NAME sections, missing names,
                    238:   and missing descriptions in all the file formats?
1.184     schwarze  239:   loc *  exist *  algo *  size *  imp ***
1.171     schwarze  240:
1.79      schwarze  241: - clean up escape sequence handling, creating three classes:
                    242:   (1) fully implemented, or parsed and ignored without loss of content
                    243:   (2) unimplemented, potentially causing loss of content
                    244:       or serious mangling of formatting (e.g. \n) -> ERROR
                    245:       see textproc/mgdiff(1) for nice examples
                    246:   (3) undefined, just output the character -> perhaps WARNING
1.184     schwarze  247:   loc ***  exist **  algo **  size **  imp *** (parser reorg helps)
1.83      schwarze  248:
1.174     schwarze  249: - kettenis wants base roff, ms, and me  Fri, 1 Jan 2010 22:13:15 +0100 (CET)
1.184     schwarze  250:   loc **  exist **  algo **  size ***  imp *
1.174     schwarze  251:
                    252: --- compatibility checks -----------------------------------------------
1.196     schwarze  253:
                    254: - write a configure check for [[:<:]] support and provide some
                    255:   fallback for whatis(1) when it doesn't work;
                    256:   Svyatoslav Mishyn  Wed, 17 Dec 2014 11:07:10 +0200
1.174     schwarze  257:
                    258: - is .Bk implemented correctly in modern groff?
                    259:   sobrado@  Tue, 19 Apr 2011 22:12:55 +0200
                    260:
1.175     schwarze  261: - compare output to Heirloom roff, Solaris roff, and
                    262:   http://repo.or.cz/w/neatroff.git  http://litcave.rudi.ir/
1.178     schwarze  263:
                    264: - look at AT&T DWB http://www2.research.att.com/sw/download
                    265:   Carsten Kunze <carsten dot kunze at arcor dot de> has patches
                    266:   Mon, 4 Aug 2014 17:01:28 +0200
1.174     schwarze  267:
1.79      schwarze  268: - look at pages generated from reStructeredText, e.g. devel/mercurial hg(1)
                    269:   These are a weird mixture of man(7) and custom autogenerated low-level
                    270:   roff stuff.  Figure out to what extent we can cope.
1.80      schwarze  271:   For details, see http://docutils.sourceforge.net/rst.html
1.79      schwarze  272:   noted by stsp@  Sat, 24 Apr 2010 09:17:55 +0200
                    273:   reminded by nicm@  Mon, 3 May 2010 09:52:41 +0100
1.160     schwarze  274:
1.174     schwarze  275: - look at pages generated from ronn(1) github.com/rtomayko/ronn
                    276:   (based on markdown)
                    277:
1.160     schwarze  278: - look at pages generated from Texinfo source by yat2m, e.g. security/gnupg
                    279:   First impression is not that bad.
1.172     schwarze  280:
                    281: - look at pages generated by pandoc; see
                    282:   https://github.com/jgm/pandoc/blob/master/src/Text/Pandoc/Writers/Man.hs
                    283:   porting planned by kili@  Thu, 19 Jun 2014 19:46:28 +0200
1.71      schwarze  284:
                    285: - check compatibility with Plan9:
                    286:   http://swtch.com/usr/local/plan9/tmac/tmac.an
                    287:   http://swtch.com/plan9port/man/man7/man.html
                    288:   "Anthony J. Bentley" <anthonyjbentley@gmail.com> 28 Dec 2010 21:58:40 -0700
1.63      schwarze  289:
1.174     schwarze  290: - check compatibility with the man(7) formatter
                    291:   https://raw.githubusercontent.com/rofl0r/hardcore-utils/master/man.c
                    292:
1.186     schwarze  293: - check compatibility with
                    294:   http://ikiwiki.info/plugins/contrib/mandoc/
                    295:   https://github.com/schmonz/ikiwiki/compare/mandoc
                    296:   Amitai Schlair  Mon, 19 May 2014 14:05:53 -0400
                    297:
1.1       kristaps  298: ************************************************************************
                    299: * formatting issues: ugly output
                    300: ************************************************************************
1.87      kristaps  301:
1.195     schwarze  302: - revisit empty in-line macros
                    303:   look at the difference between "Em x Em ." and "Sq x Em ."
                    304:   Carsten Kunze  Fri, 12 Dec 2014 00:15:41 +0100
                    305:   loc *** exist *** algo *** size * imp **
                    306:
                    307: - a column list with blank `Ta' cells triggers a spurious
1.87      kristaps  308:   start-with-whitespace printing of a newline
1.195     schwarze  309:
                    310: - In .Bl -column, .It a<tab>"b<tab>c"
                    311:   shows the quotes in groff, but not in mandoc
                    312:   loc * exist *** algo ** size * imp **
1.1       kristaps  313:
1.39      schwarze  314: - In .Bl -column,
                    315:   .It Em Authentication<tab>Key Length
                    316:   ought to render "Key Length" with emphasis, too,
                    317:   see OpenBSD iked.conf(5).
1.123     schwarze  318:   reported again Nicolas Joly via wiz@ Wed, 12 Oct 2011 00:20:00 +0200
1.184     schwarze  319:   loc *  exist ***  algo ***  size **  imp ***
1.39      schwarze  320:
1.1       kristaps  321: - empty phrases in .Bl column produce too few blanks
                    322:   try e.g. .Bl -column It Ta Ta
                    323:   reported by millert Fri, 02 Apr 2010 16:13:46 -0400
1.184     schwarze  324:   loc *  exist ***  algo ***  size *  imp **
1.48      schwarze  325:
1.83      schwarze  326: - .%T can have trailing punctuation.  Currently, it puts the trailing
                    327:   punctuation into a trailing MDOC_TEXT element inside its own scope.
                    328:   That element should rather be outside its scope, such that the
                    329:   punctuation does not get underlines.  This is not trivial to
                    330:   implement because .%T then needs some features of in_line_eoln() -
                    331:   slurp all arguments into one single text element - and one feature
                    332:   of in_line() - put trailing punctuation out of scope.
                    333:   Found in mount_nfs(8) and exports(5), search for "Appendix".
1.184     schwarze  334:   loc **  exist **  algo ***  size *  imp **
1.83      schwarze  335:
1.147     schwarze  336: - Trailing punctuation after .%T triggers EOS spacing, at least
                    337:   outside .Rs (eek!).  Simply setting ARGSFL_DELIM for .%T is not
                    338:   the right solution, it sends mandoc into an endless loop.
                    339:   reported by Nicolas Joly  Sat, 17 Nov 2012 11:49:54 +0100
1.184     schwarze  340:   loc *  exist **  algo **  size *  imp **
1.147     schwarze  341:
1.174     schwarze  342: - global variables in the SYNOPSIS of section 3 pages
                    343:   .Vt vs .Vt/.Va vs .Ft/.Va vs .Ft/.Fa ...
                    344:   from kristaps@  Tue, 08 Jun 2010 11:13:32 +0200
                    345:
1.48      schwarze  346: - in enclosures, mandoc sometimes fancies a bogus end of sentence
                    347:   reminded by jmc@  Thu, 23 Sep 2010 18:13:39 +0059
1.184     schwarze  348:   loc *  exist **  algo ***  size *  imp ***
1.197     schwarze  349:
                    350: - a line starting with "\fB something" counts as starting with whitespace
                    351:   and triggers a line break; found in audio/normalize-mp3(1)
                    352:   loc **  exist *  algo **  size *  imp **
1.149     schwarze  353:
                    354: - formatting /usr/local/man/man1/latex2man.1 with groff and mandoc
                    355:   reveals lots of bugs both in groff and mandoc...
                    356:   reported by bentley@  Wed, 22 May 2013 23:49:30 -0600
1.171     schwarze  357:
                    358: --- PDF issues ---------------------------------------------------------
                    359:
                    360: - PDF output doesn't use a monospaced font for .Bd -literal
                    361:   Example: "mandoc -Tpdf afterboot.8 > output.pdf && pdfviewer output.pdf".
                    362:   Search the text "Routing tables".
                    363:   Also check what PostScript mode does when fixing this.
                    364:   reported by juanfra@ Wed, 04 Jun 2014 21:44:58 +0200
1.186     schwarze  365:   instructions from juanfra@  Wed, 11 Jun 2014 02:21:01 +0200
                    366:     add a new <</Type /Font>> block to the PDF files with /BaseFont /Courier
                    367:     and change the /Name from /F0 to the new font (/F5 (?)).
                    368:   loc *  exist **  algo **  size *  imp **
1.173     schwarze  369:
                    370: --- HTML issues --------------------------------------------------------
                    371:
1.174     schwarze  372: - <dl><dt><dd> formatting is ugly
                    373:   hints are easy to find on the web, e.g.
                    374:   http://stackoverflow.com/questions/1713048/
                    375:   see also matthew@  Fri, 18 Jul 2014 19:25:12 -0700
1.184     schwarze  376:   loc *  exist *  algo **  size *  imp ***
1.180     schwarze  377:
1.187     schwarze  378: - jsg on icb, Nov 3, 2014:
                    379:   try to guess Xr in man(7) for hyperlinking
                    380:
1.180     schwarze  381: - The tables used to render the three-part page headers actually force
                    382:   the width of the <body> to the max-width given for <html>.
                    383:   Not yet sure how to fix that...
                    384:   Observed by an Anonymous Coward on undeadly.org:
                    385:   http://undeadly.org/cgi?action=article&sid=20140925064244&pid=1
1.184     schwarze  386:   loc *  exist *  algo **  size *  imp ***
1.177     schwarze  387:
                    388: - consider whether <var> can be used for Ar Dv Er Ev Fa Va.
                    389:   from bentley@  Wed, 13 Aug 2014 09:17:55 -0600
1.174     schwarze  390:
1.173     schwarze  391: - check https://github.com/trentm/mdocml
1.35      kristaps  392:
1.1       kristaps  393: ************************************************************************
1.104     kristaps  394: * formatting issues: gratuitous differences
1.1       kristaps  395: ************************************************************************
1.187     schwarze  396:
                    397: - .Fn reopens a new scope after punctuation in mandoc,
                    398:   but closes its scope for good in groff.
                    399:   Do we want to change mandoc or groff?
                    400:   Steffen Nurpmeso  Sat, 08 Nov 2014 13:34:59 +0100
                    401:   loc *  exist **  algo **  size *  imp **
1.103     schwarze  402:
1.174     schwarze  403: - In .Bl -enum -width 0n, groff continues one the same line after
                    404:   the number, mandoc breaks the line.
                    405:   mail to kristaps@  Mon, 20 Jul 2009 02:21:39 +0200
1.184     schwarze  406:   loc *  exist **  algo **  size *  imp **
1.174     schwarze  407:
1.103     schwarze  408: - .Pp between two .It in .Bl -column should produce one,
                    409:   not two blank lines, see e.g. login.conf(5).
                    410:   reported by jmc@  Sun, 17 Apr 2011 14:04:58 +0059
1.129     schwarze  411:   reported again by sthen@  Wed, 18 Jan 2012 02:09:39 +0000 (UTC)
1.184     schwarze  412:   loc *  exist ***  algo **  size *  imp **
1.39      schwarze  413:
1.83      schwarze  414: - If the *first* line after .It is .Pp, break the line right after
                    415:   the tag, do not pad with space characters before breaking.
                    416:   See the description of the a, c, and i commands in sed(1).
1.184     schwarze  417:   loc *  exist **  algo **  size *  imp **
1.83      schwarze  418:
                    419: - If the first line after .It is .D1, do not assert a blank line
                    420:   in between, see for example tmux(1).
                    421:   reported by nicm@  13 Jan 2011 00:18:57 +0000
1.184     schwarze  422:   loc *  exist **  algo **  size *  imp **
1.147     schwarze  423:
                    424: - Trailing punctuation after .It should trigger EOS spacing.
                    425:   reported by Nicolas Joly  Sat, 17 Nov 2012 11:49:54 +0100
                    426:   Probably, this should be fixed somewhere in termp_it_pre(), not sure.
1.184     schwarze  427:   loc *  exist **  algo **  size *  imp **
1.83      schwarze  428:
1.39      schwarze  429: - .Nx 1.0a
                    430:   should be "NetBSD 1.0A", not "NetBSD 1.0a",
                    431:   see OpenBSD ccdconfig(8).
1.184     schwarze  432:   loc *  exist *  algo *  size *  imp **
1.83      schwarze  433:
1.39      schwarze  434: - In .Bl -tag, if a tag exceeds the right margin and must be continued
                    435:   on the next line, it must be indented by -width, not width+1;
                    436:   see "rule block|pass" in OpenBSD ifconfig(8).
1.184     schwarze  437:   loc *  exist ***  algo **  size *  imp **
1.56      schwarze  438:
1.83      schwarze  439: - When the -width string contains macros, the macros must be rendered
                    440:   before measuring the width, for example
                    441:     .Bl -tag -width ".Dv message"
                    442:   in magic(5), located in src/usr.bin/file, is the same
                    443:   as -width 7n, not -width 11n.
1.129     schwarze  444:   The same applies to .Bl -column column widths;
                    445:   reported again by Nicolas Joly Thu, 1 Mar 2012 13:41:26 +0100 via wiz@ 5 Mar
1.157     schwarze  446:   reported again by Franco Fichtner Fri, 27 Sep 2013 21:02:28 +0200
1.184     schwarze  447:   loc ***  exist ***  algo ***  size **  imp ***
1.157     schwarze  448:   An easy partial fix would be to just skip the first word if it starts
                    449:   with a dot, including any following white space, when measuring.
1.184     schwarze  450:   loc *  exist *  algo *  size *  imp ***
1.83      schwarze  451:
1.56      schwarze  452: - The \& zero-width character counts as output.
                    453:   That is, when it is alone on a line between two .Pp,
                    454:   we want three blank lines, not two as in mandoc.
1.184     schwarze  455:   loc **  exist **  algo **  size *  imp **
1.83      schwarze  456:
1.64      schwarze  457: - Header lines of excessive length:
                    458:   Port OpenBSD man_term.c rev. 1.25 to mdoc_term.c
                    459:   and document it in mdoc(7) and man(7) COMPATIBILITY
                    460:   found while talking to Chris Bennett
1.184     schwarze  461:   loc *  exist *  algo *  size *  imp *
1.83      schwarze  462:
                    463: - trailing whitespace must be ignored even when followed by a font escape,
1.198     schwarze  464:   see for example
1.83      schwarze  465:     makes
                    466:     \fBdig \fR
                    467:     operate in batch mode
                    468:   in dig(1).
1.184     schwarze  469:   loc **  exist **  algo **  size *  imp **
1.166     schwarze  470:
                    471: ************************************************************************
                    472: * warning issues
                    473: ************************************************************************
                    474:
                    475: - check that MANDOCERR_BADTAB is thrown in the right cases,
                    476:   i.e. when finding a literal tab character in fill mode,
                    477:   and possibly change the wording of the warning message
                    478:   to refer to fill mode, not literal mode
                    479:   See the mail from Werner LEMBERG on the groff list,
                    480:   Fri, 14 Feb 2014 18:54:42 +0100 (CET)
1.184     schwarze  481:   loc *  exist **  algo **  size *  imp **
1.188     schwarze  482:
                    483: - warn about attempts to call non-callable macros
                    484:   Steffen Nurpmeso  Tue, 11 Nov 2014 22:55:16 +0100
                    485:   Note that formatting is inconsistent in groff.
                    486:   .Fn Po prints "Po()", .Ar Sh prints "file ..." and no "Sh".
                    487:   Relatively hard because the relevant code is scattered
                    488:   all over mdoc_macro.c and all subtly different.
                    489:   loc **  exist **  algo **  size **  imp **
1.174     schwarze  490:
                    491: - warn about "new sentence, new line"
1.184     schwarze  492:   loc **  exist **  algo ***  size *  imp **
1.174     schwarze  493:
                    494: - mandoc_special does not really check the escape sequence,
                    495:   but just the overall format
1.184     schwarze  496:   loc **  exist **  algo ***  size **  imp **
1.174     schwarze  497:
                    498: - integrate mdoclint into mandoc ("end-of-line whitespace" thread)
                    499:   from jmc@  Mon, 13 Jul 2009 17:12:09 +0100
                    500:   from kristaps@  Mon, 13 Jul 2009 18:34:53 +0200
                    501:   from jmc@  Mon, 13 Jul 2009 17:45:37 +0059
                    502:   from kristaps@  Mon, 13 Jul 2009 19:02:03 +0200
1.184     schwarze  503:   (mostly done, check what remains)
1.174     schwarze  504:
                    505: - -Tlint parser errors and warnings to stdout
                    506:   to tech@mdocml, naddy@  Wed, 28 Sep 2011 11:21:46 +0200
                    507:   wait!  kristaps@  Sun, 02 Oct 2011 17:12:52 +0200
                    508:
                    509: - for system errors, use errno/strerror/warn/err
                    510:
                    511: ************************************************************************
                    512: * documentation issues
                    513: ************************************************************************
                    514:
                    515: - mention hyphenation rules:
                    516:   breaking at letter-letter in text mode (not macro args)
                    517:   proper hyphenation is unimplemented
                    518:
                    519: - talk about spacing around delimiters
                    520:   to jmc@, kristaps@  Sat, 23 Apr 2011 17:41:27 +0200
                    521:
                    522: - mark macros as: page structure domain, manual domain, general text domain
                    523:   is this useful?
                    524:
                    525: - mention /usr/share/misc/mdoc.template in mdoc(7)?
1.185     schwarze  526:
                    527: - Is all the content from http://www.std.com/obi/BSD/doc/usd/28.tbl/tbl
                    528:   covered in tbl(7)?
1.1       kristaps  529:
1.9       kristaps  530: ************************************************************************
                    531: * performance issues
                    532: ************************************************************************
1.176     schwarze  533:
                    534: - Why are we using MAP_SHARED, not MAP_PRIVATE for mmap(2)?
                    535:   How does SQLITE_CONFIG_PAGECACHE actually work?  Document it!
                    536:   from kristaps@  Sat, 09 Aug 2014 13:51:36 +0200
1.9       kristaps  537:
1.198     schwarze  538: Several areas can be cleaned up to make mandoc even faster.  These are
1.9       kristaps  539:
                    540: - improve hashing mechanism for macros (quite important: performance)
                    541:
                    542: - improve hashing mechanism for characters (not as important)
1.23      kristaps  543:
1.37      kristaps  544: - the PDF file is HUGE: this can be reduced by using relative offsets
1.115     kristaps  545:
                    546: - instead of re-initialising the roff predefined-strings set before each
1.198     schwarze  547:   parse, create a read-only version the first time and copy it
1.184     schwarze  548:   loc *  exist **  algo **  size *  imp **
1.37      kristaps  549:
1.23      kristaps  550: ************************************************************************
                    551: * structural issues
                    552: ************************************************************************
1.189     schwarze  553:
                    554: - Use libz directly instead of forking gunzip(1).
                    555:   Suggested by bapt at FreeBSD among others.
1.122     schwarze  556:
                    557: - We use the input line number at several places to distinguish
                    558:   same-line from different-line input.  That plainly doesn't work
                    559:   with user-defined macros, leading to random breakage.
1.67      schwarze  560:
                    561: - Find better ways to prevent endless loops
                    562:   in roff(7) macro and string expansion.
1.198     schwarze  563:
1.96      schwarze  564: - Finish cleanup of date handling.
1.91      schwarze  565:   Decide which formats should be recognized where.
                    566:   Update both mdoc(7) and man(7) documentation.
                    567:   Triggered by  Tim van der Molen  Tue, 22 Feb 2011 20:30:45 +0100
1.186     schwarze  568:
                    569: - struct mparse refactoring
                    570:   Steffen Nurpmeso  Thu, 04 Sep 2014 12:50:00 +0200
1.170     schwarze  571:
                    572: - Consider creating some views that will make the database more
                    573:   readable from the sqlite3 shell.  Consider using them to
                    574:   abstract from the database structure, too.
                    575:   suggested by espie@  Sat, 19 Apr 2014 14:52:57 +0200
                    576:
1.179     kristaps  577: ************************************************************************
                    578: * CGI issues
                    579: ************************************************************************
                    580:
                    581:  - Enable HTTP compression by detecting gzip encoding and filtering
                    582:    output through libz.
                    583:  - Sandbox (see OpenSSH).
                    584:  - Enable caching support via HTTP 304 and If-Modified-Since.
                    585:  - Allow for cgi.h to be overridden by CGI environment variables.
                    586:    Otherwise, binary distributions will inherit the compile-time
                    587:    behaviour, which is not optimal.
                    588:  - Have Mac OSX systems automatically disable -static compilation of the
                    589:    CGI: -static isn't supported.
1.181     kristaps  590:
1.192     schwarze  591: ************************************************************************
                    592: * to improve in the groff_mdoc(7) macros
                    593: ************************************************************************
                    594:
                    595: - use uname(1) to set doc-default-operating-system at install time
                    596:   tobimensch  Mon, 1 Dec 2014 00:25:07 +0100

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