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Diff for /mandoc/TODO between version 1.22 and 1.109

version 1.22, 2010/07/03 00:48:09 version 1.109, 2011/06/11 15:41:35
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 ************************************************************************  ************************************************************************
   * Official mandoc TODO.
   * $Id$
   ************************************************************************
   
   ************************************************************************
   * parser bugs
   ************************************************************************
   
   - .TP before .SH is still FATAL in man(7)
     reported by brad@  Sat, 15 Jan 2011 15:54:54 -0500
   
   ************************************************************************
   * formatter bugs
   ************************************************************************
   
   - tbl(7): Horizontal and vertical lines are formatted badly:
     With the box option, there is too much white space at the end of cells.
     Horizontal lines from "=" lines are a bit too long.
     yuri dot pankov at gmail dot com  Thu, 14 Apr 2011 05:45:26 +0400
   
   ************************************************************************
 * missing features  * missing features
 ************************************************************************  ************************************************************************
   
 - explicit blocks with missing end macro should be implicitely closed  --- missing roff features ----------------------------------------------
   at the end of the enclosing block, e.g. .Bl It (El) Sh  
   reminded by stsp@  in net/pptp pptp.8  Fri, 23 Apr 2010 20:32:39 +0200  
   
 - fix bad block nesting involving multiple identical explicit blocks  - .ad (adjust margins)
   see the OpenBSD mdoc_macro.c 1.47 commit message    .ad l -- adjust left margin only (flush left)
     .ad r -- adjust right margin only (flush right)
     .ad c -- center text on line
     .ad b -- adjust both margins (alias: .ad n)
     .na   -- temporarily disable adjustment without changing the mode
     .ad   -- re-enable adjustment without changing the mode
     Adjustment mode is ignored while in no-fill mode (.nf).
   
 - we need real .ds; for example, terminfo.3 has  - .it (line traps) occur in mysql(1), yasm_arch(7)
   .ds n 5    generated by DocBook XSL Stylesheets v1.71.1 <http://docbook.sf.net/>
   and then later    reported by brad@  Sat, 15 Jan 2011 15:48:18 -0500
   \fBterminfo\fR(\*n)  
   reported orally by halex@ during c2k10  
   
 - \*(Pu is not implemented, but used in mdoc.samples  - .ns (no-space mode) occurs in xine-config(1)
   implementing .ds would solve this as well    reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500
   reminded by jmc@, last on Sun, 27 Jun 2010 15:29:18 +0100  
   
   - xloadimage(1) wants .ti (temporary indent), rep by naddy@
   
   - .ta (tab settings) occurs in ircbug(1) and probably gnats(1)
     reported by brad@  Sat, 15 Jan 2011 15:50:51 -0500
   
   - pod2man expects `tr' to be implemented for \*(-- to work
   
   - \c (interrupted text) occurs in chat(8)
   
   --- missing mdoc features ----------------------------------------------
   
   - fix bad block nesting involving multiple identical explicit blocks
     see the OpenBSD mdoc_macro.c 1.47 commit message
   
 - .Bl -column .Xo support is missing  - .Bl -column .Xo support is missing
   ultimate goal:    ultimate goal:
   restore .Xr and .Dv to    restore .Xr and .Dv to
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   lib/libc/gen/signal.3    lib/libc/gen/signal.3
   lib/libc/sys/sigaction.2    lib/libc/sys/sigaction.2
   
 - implement \\  - edge case: decide how to deal with blk_full bad nesting, e.g.
   in plain text, identical to \e    .Sh .Nm .Bk .Nm .Ek .Sh found by jmc@ in ssh-keygen(1)
   as a macro argument, identical to \ i.e. escaping the next character    from jmc@  Wed, 14 Jul 2010 18:10:32 +0100
   We do not have macro definitions yet; if we implement them,  
   \\ must behave in a macro def like in a macro argument,  
   and when using the macro, it must expand yet again.  
   
 - implement \s (physical font size)  - \\ is now implemented correctly
   \sN - set to N    * when defining strings and macros using .ds and .de
   \s+N - increment by N, 1 <= N <= 8    * when parsing roff(7) and man(7) macro arguments
   \s-N - decrement by N, 1 <= N <= 8    It does not yet work in mdoc(7) macro arguments
   \s0 - restore previous size    because libmdoc does not yet use mandoc_getarg().
   \s(nn \s+-(nn \s'+-nn' \s+-'nn' \s[+-nn] \s+-[nn] - disambiguate    Also check what happens in plain text, it must be identical to \e.
   registers: .s .ps .sr .psr  
   used by e.g. cu(1), tip(1)  
   
 - look at bsd.lv tbl(1)  - .Bd -filled should not be the same as .Bd -ragged, but align both
   from kristaps@  Fri, 11 Sep 2009 17:10:53 +0200    the left and right margin.  In groff, it is implemented in terms
   also look at the mail from Thomas Klausner wiz at NetBSD    of .ad b, which we don't have either.  Found in cksum(1).
     on Wed, 2 Jun 2010 11:01:29 +0200  
   
 - look at pages generated from reStructeredText, e.g. devel/mercurial hg(1)  
   These are a weird mixture of man(7) and custom autogenerated low-level  
   roff stuff.  Figure out to what extent we can cope.  
   noted by stsp@  Sat, 24 Apr 2010 09:17:55 +0200  
   reminded by nicm@  Mon, 3 May 2010 09:52:41 +0100  
   
 - implement blank `Bl -column', such as  - implement blank `Bl -column', such as
   .Bl -column    .Bl -column
   .It foo Ta bar    .It foo Ta bar
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 - explicitly disallow nested `Bl -column', which would clobber internal  - explicitly disallow nested `Bl -column', which would clobber internal
   flags defined for struct mdoc_macro    flags defined for struct mdoc_macro
   
   - In .Bl -column .It, the end of the line probably has to be regarded
     as an implicit .Ta, if there could be one, see the following mildly
     ugly code from login.conf(5):
       .Bl -column minpasswordlen program xetcxmotd
       .It path Ta path Ta value of Dv _PATH_DEFPATH
       .br
       Default search path.
     reported by Michal Mazurek <akfaew at jasminek dot net>
     via jmc@ Thu, 7 Apr 2011 16:00:53 +0059
   
   - inside `.Bl -column' phrases, punctuation is handled like normal
     text, e.g. `.Bl -column .It Fl x . Ta ...' should give "-x -."
   
   - inside `.Bl -column' phrases, TERMP_IGNDELIM handling by `Pf'
     is not safe, e.g. `.Bl -column .It Pf a b .' gives "ab."
     but should give "ab ."
   
 - set a meaningful default if no `Bl' list type is assigned  - set a meaningful default if no `Bl' list type is assigned
   
 - have a blank `It' head for `Bl -tag' not puke  - have a blank `It' head for `Bl -tag' not puke
   
 - ignore horrendous m[] font colouring  
   reported by J.C. Roberts  
   
 - prohibit `Nm' from having non-text HEAD children  - prohibit `Nm' from having non-text HEAD children
   (e.g., NetBSD mDNSShared/dns-sd.1)    (e.g., NetBSD mDNSShared/dns-sd.1)
   (mdoc_html.c and mdoc_term.c `Nm' handlers can be slightly simplified)    (mdoc_html.c and mdoc_term.c `Nm' handlers can be slightly simplified)
   
   - When there is free text in the SYNOPSIS and that free text contains
     the .Nm macro, groff somehow understands to treat the .Nm as an in-line
     macro, while mandoc treats it as a block macro and breaks the line.
     No idea how the logic for distinguishing in-line and block instances
     should be, needs investigation.
     uqs@  Thu, 2 Jun 2011 11:03:51 +0200
     uqs@  Thu, 2 Jun 2011 11:33:35 +0200
   
   --- missing man features -----------------------------------------------
   
   - .RS/.RE can be nested, see e.g. the x11/fluxbox manuals
     noticed by dcoppa@  Wed, Apr 13, 2011 at 04:58:14PM +0200:
     also affects p5-Net-SFTP-Foreign-1.65
     as reported by gsoares@  Wed, 18 May 2011 09:59:06 -0300
   
   - groff an-ext.tmac macros (.UR, .UE) occur in xine(5)
     reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500
   
   --- missing tbl features -----------------------------------------------
   
   - implement basic non-parametric .de to support e.g. sox(1)
     reported by naddy@ Sat, 16 Oct 2010 23:51:57 +0200
     *** sox(1) still doesn't work, tbl(1) errors need investigation
   
   - allow standalone `.' to be interpreted as an end-of-layout
     delimiter instead of being thrown away as a no-op roff line
     reported by Yuri Pankov, Wed 18 May 2011 11:34:59 CEST
   
   --- missing misc features ----------------------------------------------
   
   - clean up escape sequence handling, creating three classes:
     (1) fully implemented, or parsed and ignored without loss of content
     (2) unimplemented, potentially causing loss of content
         or serious mangling of formatting (e.g. \n) -> ERROR
         see textproc/mgdiff(1) for nice examples
     (3) undefined, just output the character -> perhaps WARNING
   
   - The \t escape sequence is the same as a literal tab, see for example
     the ASCII table in hexdump(1) where
       .Bl -column \&000_nu \&001_so \&002_st \&003_et \&004_eo
       .It \&000\ nul\t001\ soh\t002\ stx\t003\ etx\t004\ eot\t005\ enq
     produces
       000 nul  001 soh  002 stx  003 etx  004 eot  005 enq
     and the example in oldrdist(1)
   
   - look at pages generated from reStructeredText, e.g. devel/mercurial hg(1)
     These are a weird mixture of man(7) and custom autogenerated low-level
     roff stuff.  Figure out to what extent we can cope.
     For details, see http://docutils.sourceforge.net/rst.html
     noted by stsp@  Sat, 24 Apr 2010 09:17:55 +0200
     reminded by nicm@  Mon, 3 May 2010 09:52:41 +0100
   
   - check compatibility with Plan9:
     http://swtch.com/usr/local/plan9/tmac/tmac.an
     http://swtch.com/plan9port/man/man7/man.html
     "Anthony J. Bentley" <anthonyjbentley@gmail.com> 28 Dec 2010 21:58:40 -0700
   
 ************************************************************************  ************************************************************************
 * formatting issues: ugly output  * formatting issues: ugly output
 ************************************************************************  ************************************************************************
   
 - outside list context, text following .Sm off  - a column list with blank `Ta' cells triggers a spurrious
   seems to follow without a blank (TERM_NOBLANK reset late?) e.g.    start-with-whitespace printing of a newline
         .Sm off  
         .Xo  
         .Op Ar bind_address No /  
         .Ar port  
         .Xc  
         .Sm on  
         or by enclosing  
   reported by jmc Tue, 13 Apr 2010 08:48:14 +0100  
   
 - indentation got lost in SYNOPSIS, e.g.  - double quotes inside double quotes are escaped by doubling them
    SYNOPSIS    implement this in mdoc(7), too
         date [-ajnu] [-d dst] [-r seconds] [-t minutes_west] [+format]    so far, we only have it in roff(7) and man(7)
   -          [[[[[[cc]yy]mm]dd]HH]MM[.SS]]    reminded by millert@  Thu, 09 Dec 2010 17:29:52 -0500
   +     [[[[[[cc]yy]mm]dd]HH]MM[.SS]]  
   reminded by Ludo Smissaert  Mon, 10 May 2010 12:15:11 +0200  
   
   - perl(1) SYNOPSIS looks bad; reported by deraadt@
     1) man(7) seems to need SYNOPSIS .Nm blocks, too
   
   - In .Bl -column,
     .It Em Authentication<tab>Key Length
     ought to render "Key Length" with emphasis, too,
     see OpenBSD iked.conf(5).
   
 - empty phrases in .Bl column produce too few blanks  - empty phrases in .Bl column produce too few blanks
   try e.g. .Bl -column It Ta Ta    try e.g. .Bl -column It Ta Ta
   reported by millert Fri, 02 Apr 2010 16:13:46 -0400    reported by millert Fri, 02 Apr 2010 16:13:46 -0400
   
   - .%T can have trailing punctuation.  Currently, it puts the trailing
     punctuation into a trailing MDOC_TEXT element inside its own scope.
     That element should rather be outside its scope, such that the
     punctuation does not get underlines.  This is not trivial to
     implement because .%T then needs some features of in_line_eoln() -
     slurp all arguments into one single text element - and one feature
     of in_line() - put trailing punctuation out of scope.
     Found in mount_nfs(8) and exports(5), search for "Appendix".
   
   - in enclosures, mandoc sometimes fancies a bogus end of sentence
     reminded by jmc@  Thu, 23 Sep 2010 18:13:39 +0059
   
 ************************************************************************  ************************************************************************
 * formatting issues: gratuitious differences  * formatting issues: gratuitous differences
 ************************************************************************  ************************************************************************
   
 - none reported right now (yet schwarze@ knows of some)  - .Rv (and probably .Ex) print different text if an `Nm' has been named
     or not (run a manual without `Nm blah' to see this).  I'm not sure
     that this exists in the wild, but it's still an error.
   
   - In .Bl -bullet, the groff bullet is "+\b+\bo\bo", the mandoc bullet
     is just "o\bo".
     see for example OpenBSD ksh(1)
   
   - The characters "|" and "\*(Ba" should never be bold,
     not even in the middle of a word, e.g. ".Cm b\*(Bac" in
     "mknod [-m mode] name b|c major minor"
     in OpenBSD ksh(1)
   
   - A bogus .Pp between two .It must not produce a double blank line,
     see between -R and -r in OpenBSD rm(1), before "update" in mount(8),
     or in DIAGNOSTICS in init(8), or before "is always true" in ksh(1).
     The same happens with .Pp just before .El, see bgpd.conf(5).
     Also have `It' complain if `Pp' is invoked at certain times (not
     -compact?).
   
   - .Pp between two .It in .Bl -column should produce one,
     not two blank lines, see e.g. login.conf(5).
     reported by jmc@  Sun, 17 Apr 2011 14:04:58 +0059
   
   - If the *first* line after .It is .Pp, break the line right after
     the tag, do not pad with space characters before breaking.
     See the description of the a, c, and i commands in sed(1).
   
   - If the first line after .It is .D1, do not assert a blank line
     in between, see for example tmux(1).
     reported by nicm@  13 Jan 2011 00:18:57 +0000
   
   - .Nx 1.0a
     should be "NetBSD 1.0A", not "NetBSD 1.0a",
     see OpenBSD ccdconfig(8).
   
   - In .Bl -tag, if a tag exceeds the right margin and must be continued
     on the next line, it must be indented by -width, not width+1;
     see "rule block|pass" in OpenBSD ifconfig(8).
   
   - When the -width string contains macros, the macros must be rendered
     before measuring the width, for example
       .Bl -tag -width ".Dv message"
     in magic(5), located in src/usr.bin/file, is the same
     as -width 7n, not -width 11n.
   
   - The \& zero-width character counts as output.
     That is, when it is alone on a line between two .Pp,
     we want three blank lines, not two as in mandoc.
   
   - When .Fn arguments exceed one output line, all but the first
     should be indented, see e.g. rpc(3);
     reported by jmc@ on discuss@  Fri, 29 Oct 2010 13:48:33 +0100
   
   - .Ns should work when called at the end of an input line, see
     the following code in vi(1):
       .It Xo
       .Op Ar line
       .Cm a Ns Op Cm ppend Ns
       .Op Cm !\&
       .Xc
       The input text is appended after the specified line.
   
   - Header lines of excessive length:
     Port OpenBSD man_term.c rev. 1.25 to mdoc_term.c
     and document it in mdoc(7) and man(7) COMPATIBILITY
     found while talking to Chris Bennett
   
   - In man(7), the sequence
       .HP
       one line of regular text
       .SH
     should not produce two blank lines before the .SH,
     see for example named-checkconf(8).
   
   - In man(7), the sequence
       regular text
       .RS
       .IP
     should have a blank line between the text and the beginning of the
     indented paragraph, see for example sudo(1).
   
   - In man(7), the sequence
       .SH HEADER
       <blank line>
       .PP
       regular text
     should not produce any blank lines between the header and the text,
     see for example rsync(1).
     Reported by naddy@  Mon, 28 Mar 2011 20:45:42 +0200
   
   - In man(7), the sequence
       regular text
       .PP
       .RS
       indented text
     should produce one blank line between the regular and indented texts,
     see for example rsync(1), and
       .RE
       <blank line>
       .PP
       .RS
     should produce two,not one blank lines.
     Reported by naddy@  Mon, 28 Mar 2011 20:45:42 +0200
   
   - In man(7), the sequence
       regular text
       .IP
       .IP "tag"
       indented text
     should produce one, not four blank lines between the regular text
     and the tag, see for example rsync(1).
     Likewise,
       regular text
       .IP
       indented text
     should produce one, not two blank lines in between, and
       regular text
       .IP
       .RS
       .IP tag
       indented text
     should produce one, not three blank lines.
     Reported by naddy@  Mon, 28 Mar 2011 20:45:42 +0200
   
   - At least sometimes, .sp is ignored right after .SH; see named.conf(5).
   
   - trailing whitespace must be ignored even when followed by a font escape,
     see for example
       makes
       \fBdig \fR
       operate in batch mode
     in dig(1).
   
 ************************************************************************  ************************************************************************
   * error reporting issues
   ************************************************************************
   
   ************************************************************************
 * performance issues  * performance issues
 ************************************************************************  ************************************************************************
   
 Several areas can be cleaned up to make mandoc even faster.  These are  Several areas can be cleaned up to make mandoc even faster.  These are
   
 - improve caching mechanism to handle other per-element arguments so  
   that they need not be recalculated between front- and back-ends (also  
   reduces code size and complexity):  
     `Bl -column' pointer  
   
 - improve hashing mechanism for macros (quite important: performance)  - improve hashing mechanism for macros (quite important: performance)
   
 - improve hashing mechanism for characters (not as important)  - improve hashing mechanism for characters (not as important)
   
   - the PDF file is HUGE: this can be reduced by using relative offsets
   
   ************************************************************************
   * structural issues
   ************************************************************************
   
   - Find better ways to prevent endless loops
     in roff(7) macro and string expansion.
   
   - Finish cleanup of date handling.
     Decide which formats should be recognized where.
     Update both mdoc(7) and man(7) documentation.
     Triggered by  Tim van der Molen  Tue, 22 Feb 2011 20:30:45 +0100
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Removed from v.1.22  
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  Added in v.1.109
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