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Diff for /mandoc/TODO between version 1.3 and 1.87

version 1.3, 2010/05/15 09:41:43 version 1.87, 2011/01/31 12:52:43
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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
   
   - The mdoc(7) parser should handle `\.' as punctuation:
       .Ql .if ${VAR} op something \.
     should produce
       `.if ${VAR} op something'.
     not
       `.if ${VAR} op something .'
     as seen in make(1).
     To escape the dot, one would use `\&.'.
   
   - the roff parser doesn't tolerate additional characters between
     a macro and the \} terminating a conditional block, e.g.
     .if n \{
     .br \}
     reported by ulrich spoerlein  Tue, 19 Oct 2010 20:39:50 +0200
   
   ************************************************************************
   * formatter bugs
   ************************************************************************
   
   ************************************************************************
 * 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  
   
   - .ad (adjust margins)
     .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).
   
   - .it (line traps) occur in mysql(1), yasm_arch(7)
     generated by DocBook XSL Stylesheets v1.71.1 <http://docbook.sf.net/>
     reported by brad@  Sat, 15 Jan 2011 15:48:18 -0500
   
   - .ns (no-space mode) occurs in xine-config(1)
     reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500
   
   - 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
   
 - .Bk / .Ek is broken, e.g.  - edge case: decide how to deal with blk_full bad nesting, e.g.
   $ man ssh    .Sh .Nm .Bk .Nm .Ek .Sh found by jmc@ in ssh-keygen(1)
   [...]    from jmc@  Wed, 14 Jul 2010 18:10:32 +0100
   ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec] [-D  
   [bind_address:]port] [-e escape_char] [-F configfile] [-I pkcs11]  
   reminded by Ludo Smissaert  Mon, 10 May 2010 12:15:11 +0200  
   also reported by jmc@ earlier  
   
 - man(7) .TH should recognize "3p" as a section number  - \\ is now implemented correctly
   found in usr.bin/pkg_add OpenBSD::Getopt    * when defining strings and macros using .ds and .de
     * when parsing roff(7) and man(7) macro arguments
     It does not yet work in mdoc(7) macro arguments
     because libmdoc does not yet use mandoc_getarg().
     Also check what happens in plain text, it must be identical to \e.
   
 - implement \\  - .Bd -filled should not be the same as .Bd -ragged, but align both
   in plain text, identical to \e    the left and right margin.  In groff, it is implemented in terms
   as a macro argument, identical to \ i.e. escaping the next character    of .ad b, which we don't have either.  Found in cksum(1).
   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.  
   
 - look at bsd.lv tbl(1)  - implement blank `Bl -column', such as
   from kristaps@  Fri, 11 Sep 2009 17:10:53 +0200    .Bl -column
     .It foo Ta bar
     .El
   
   - explicitly disallow nested `Bl -column', which would clobber internal
     flags defined for struct mdoc_macro
   
   - 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
   
   - have a blank `It' head for `Bl -tag' not puke
   
   - prohibit `Nm' from having non-text HEAD children
     (e.g., NetBSD mDNSShared/dns-sd.1)
     (mdoc_html.c and mdoc_term.c `Nm' handlers can be slightly simplified)
   
   --- missing man features -----------------------------------------------
   
   - bashbug(1) complains "line scope broken" after
     .SM
     .B something
     should either just work or be a warning
     reported by naddy@
   
   - 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
   
   --- 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)  - 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    These are a weird mixture of man(7) and custom autogenerated low-level
   roff stuff.  Figure out to what extent we can cope.    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    noted by stsp@  Sat, 24 Apr 2010 09:17:55 +0200
   reminded by nicm@  Mon, 3 May 2010 09:52:41 +0100    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
   
 - FIXED OpenBSD term.h 1.16 term.c 1.30 mdoc_term.c 1.75 schwarze 23.4.10  
   handle tab characters outside literal context, e.g. usb(4)  
   reported by jmc@  Mon, 19 Apr 2010 07:42:12 +0100  
   NEEDS MERGING TO bsd.lv  
   
 - FIXED OpenBSD man.h 1.15 libman.h 1.16 man_hash.c 1.9  
   man.c 1.25 man_macro.c 1.15 man_validate.c 1.19 man_action.c 1.15  
   man_term.c 1.28 man_html.c 1.9 schwarze 25.4.  
   implement .if .ie .el  
   noticed by espie@  Fri, 23 Apr 2010 17:10:35 +0200  
   NEEDS MERGING TO bsd.lv  
   
   
 ************************************************************************  ************************************************************************
 * 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  
   
 - do not break the line after "--", it's probably a long option  - double quotes inside double quotes are escaped by doubling them
   reminded by stsp in net/pptp pptp.8  Fri, 23 Apr 2010 20:32:39 +0200    implement this in mdoc(7), too
     so far, we only have it in roff(7) and man(7)
     reminded by millert@  Thu, 09 Dec 2010 17:29:52 -0500
   
 - URGENT, this is making many kernel manuals look bad:  - perl(1) SYNOPSIS looks bad; reported by deraadt@
   .Ft/.Fn should MAYBE behave in custom section like in SYNOPSIS?    1) man(7) seems to need SYNOPSIS .Nm blocks, too
   autoconf.9:  
     .Sh DIRECT CONFIGURATION  
     .nr nS 1  
     .Ft "struct device *"  
     .Fn config_found_sm "struct device *parent"  
   groff:  
     DIRECT CONFIGURATION  
       struct device *  
       config_found_sm(struct device *parent, ...  
   reported by sthen  Tue, 20 Apr 2010 13:42:51 +0100  
   
 - indentation got lost in SYNOPSIS, e.g.  - In .Bl -column,
    SYNOPSIS    .It Em Authentication<tab>Key Length
         date [-ajnu] [-d dst] [-r seconds] [-t minutes_west] [+format]    ought to render "Key Length" with emphasis, too,
   -          [[[[[[cc]yy]mm]dd]HH]MM[.SS]]    see OpenBSD iked.conf(5).
   +     [[[[[[cc]yy]mm]dd]HH]MM[.SS]]  
   reminded by Ludo Smissaert  Mon, 10 May 2010 12:15:11 +0200  
   
 - 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: gratuitious differences
 ************************************************************************  ************************************************************************
   
 - lines containing blank characters, and nothing else,  - .Rv (and probably .Ex) print different text if an `Nm' has been named
   in literal context (.Bd -literal):    or not (run a manual without `Nm blah' to see this).  I'm not sure
   groff outputs just blank lines "\n"    that this exists in the wild, but it's still an error.
   mandoc outputs blanks to the left margin,  
   then the number of balnks minus one  
   
   - 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?).
   
   - 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 only be effective when called by another macro,
     not as a stand-alone macro at the beginning of a line;
     see for example the awk(1) SYNOPSIS.
   
   - .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).
   
   - 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).
   
 ************************************************************************  ************************************************************************
 * parser errors without any effect on formatting  * error reporting issues
 ************************************************************************  ************************************************************************
   
 - OpenBSD::PackageName(3p) has "if (block) 90:1" in the parse tree  ************************************************************************
   * performance issues
   ************************************************************************
   
   Several areas can be cleaned up to make mandoc even faster.  These are
   
   - improve hashing mechanism for macros (quite important: performance)
   
   - 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.
   

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