===================================================================
RCS file: /cvs/mandoc/mandoc.1,v
retrieving revision 1.18
retrieving revision 1.50
diff -u -p -r1.18 -r1.50
--- mandoc/mandoc.1	2009/06/11 07:26:35	1.18
+++ mandoc/mandoc.1	2010/01/29 14:39:38	1.50
@@ -1,4 +1,4 @@
-.\"	$Id: mandoc.1,v 1.18 2009/06/11 07:26:35 kristaps Exp $
+.\"	$Id: mandoc.1,v 1.50 2010/01/29 14:39:38 kristaps Exp $
 .\"
 .\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
 .\"
@@ -14,66 +14,71 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: June 11 2009 $
+.Dd $Mdocdate: January 29 2010 $
 .Dt MANDOC 1
 .Os
-.\" SECTION
+.
+.
 .Sh NAME
 .Nm mandoc
 .Nd format and display UNIX manuals
-.\" SECTION
+.
+.
 .Sh SYNOPSIS
 .Nm mandoc
-.Op Fl V
 .Op Fl f Ns Ar option...
 .Op Fl m Ns Ar format
-.Op Fl W Ns Ar err...
+.Op Fl O Ns Ar option...
 .Op Fl T Ns Ar output
+.Op Fl V
+.Op Fl W Ns Ar err...
 .Op Ar infile...
-.\" SECTION
+.
+.
 .Sh DESCRIPTION
 The
 .Nm
-utility formats 
+utility formats
 .Ux
 manual pages for display.  The arguments are as follows:
-.Bl -tag -width XXXXXXXXXXXX
-.\" ITEM
+.
+.Bl -tag -width Ds
 .It Fl f Ns Ar option...
-Override default compiler behaviour.  See 
+Comma-separated compiler options.  See
 .Sx Compiler Options
 for details.
-.\" ITEM
-.It Fl m
+.
+.It Fl m Ns Ar format
 Input format.  See
 .Sx Input Formats
 for available formats.  Defaults to
 .Fl m Ns Ar andoc .
-.\" ITEM
-.It Fl T
+.
+.It Fl O Ns Ar option...
+Comma-separated output options.  See
+.Sx Output Options
+for details.
+.
+.It Fl T Ns Ar output
 Output format.  See
 .Sx Output Formats
 for available formats.  Defaults to
 .Fl T Ns Ar ascii .
-.\" ITEM
+.
 .It Fl V
 Print version and exit.
-.\" ITEM
+.
 .It Fl W Ns Ar err...
-Print warning messages.  May be set to 
+Comma-separated warning options.  Use
 .Fl W Ns Ar all
-for all warnings, 
-.Ar compat
-for groff/troff-compatibility warnings, or
-.Ar syntax
-for syntax warnings.  If
-.Fl W Ns Ar error 
-is specified, warnings are considered errors and cause utility
-termination.  Multiple 
+to print warnings,
+.Fl W Ns Ar error
+for warnings to be considered errors and cause utility
+termination.  Multiple
 .Fl W
 arguments may be comma-separated, such as
 .Fl W Ns Ar error,all .
-.\" ITEM
+.
 .It Ar infile...
 Read input from zero or more
 .Ar infile .
@@ -81,54 +86,24 @@ If unspecified, reads from stdin.  If multiple files a
 .Nm
 will halt with the first failed parse.
 .El
-.\" PARAGRAPH
+.
 .Pp
-By default, 
-.Nm 
-reads 
+By default,
+.Nm
+reads
 .Xr mdoc 7
 or
 .Xr man 7
 text from stdin, implying
 .Fl m Ns Ar andoc ,
-and prints 78-column backspace-encoded output to stdout as if
+and produces
 .Fl T Ns Ar ascii
-were provided.
-.\" PARAGRAPH
+output.
+.
 .Pp
 .Ex -std mandoc
-.\" SUB-SECTION
-.Ss Punctuation
-If punctuation is set apart from words, such as in the phrase
-.Dq to be \&, or not to be ,
-it's processed by
-.Nm
-according to the following rules.  Opening punctuation
-.Po
-.Sq \&( , 
-.Sq \&[ , 
-and
-.Sq \&{
-.Pc 
-is not followed by a space. Closing punctuation
-.Po
-.Sq \&. , 
-.Sq \&, , 
-.Sq \&; , 
-.Sq \&: , 
-.Sq \&? , 
-.Sq \&! , 
-.Sq \&) , 
-.Sq \&] 
-and
-.Sq \&}
-.Pc 
-is not preceded by whitespace.
-.Pp
-If the input is
-.Xr mdoc 7 ,
-these rules are also applied to macro arguments when appropriate.
-.\" SUB-SECTION
+.
+.
 .Ss Input Formats
 The
 .Nm
@@ -144,146 +119,409 @@ respectively.  The
 .Xr mdoc 7
 format is
 .Em strongly
-recommended; 
+recommended;
 .Xr man 7
 should only be used for legacy manuals.
+.
 .Pp
 A third option,
 .Fl m Ns Ar andoc ,
 which is also the default, determines encoding on-the-fly: if the first
-non-comment macro is 
-.Sq \&.Dd
+non-comment macro is
+.Sq \&Dd
 or
-.Sq \&.Dt ,
-the 
+.Sq \&Dt ,
+the
 .Xr mdoc 7
 parser is used; otherwise, the
 .Xr man 7
 parser is used.
+.
 .Pp
 If multiple
-files are specified with 
-.Fl m Ns Ar andoc , 
+files are specified with
+.Fl m Ns Ar andoc ,
 each has its file-type determined this way.  If multiple files are
 specified and
 .Fl m Ns Ar doc
 or
 .Fl m Ns Ar an
 is specified, then this format is used exclusively.
-.\" .Pp
-.\" The following escape sequences are recognised, although the per-format
-.\" compiler may not allow certain sequences.
-.\" .Bl -tag -width Ds -offset XXXX
-.\" .It \efX
-.\" sets the font mode to X (B, I, R or P, where P resets the font)
-.\" .It \eX, \e(XX, \e[XN]
-.\" queries the special-character table for a corresponding symbol
-.\" .It \e*X, \e*(XX, \e*[XN]
-.\" deprecated special-character format
-.\" .El
-.\" SUB-SECTION
+.
+.
 .Ss Output Formats
 The
 .Nm
 utility accepts the following
 .Fl T
-arguments:
-.Bl -tag -width XXXXXXXXXXXX 
+arguments (see
+.Sx OUTPUT ) :
+.
+.Bl -tag -width Ds
 .It Fl T Ns Ar ascii
 Produce 7-bit ASCII output, backspace-encoded for bold and underline
-styles.  This is the default.
+styles.  This is the default.  See
+.Sx ASCII Output .
+.
+.It Fl T Ns Ar html
+Produce strict HTML-4.01 output, with a sane default style.  See
+.Sx HTML Output .
+.
+.It Fl T Ns Ar xhtml
+Produce strict XHTML-1.0 output, with a sane default style.  See
+.Sx XHTML Output .
+.
 .It Fl T Ns Ar tree
 Produce an indented parse tree.
+.
 .It Fl T Ns Ar lint
 Parse only: produce no output.
 .El
+.
 .Pp
 If multiple input files are specified, these will be processed by the
 corresponding filter in-order.
-.\" SUB-SECTION
+.
+.
 .Ss Compiler Options
-Default compiler behaviour may be overriden with the
+Default compiler behaviour may be overridden with the
 .Fl f
 flag.
-.Bl -tag -width XXXXXXXXXXXXXX 
+.
+.Bl -tag -width Ds
 .It Fl f Ns Ar ign-scope
 When rewinding the scope of a block macro, forces the compiler to ignore
 scope violations.  This can seriously mangle the resulting tree.
 .Pq mdoc only
+.
 .It Fl f Ns Ar ign-escape
 Ignore invalid escape sequences.
-.It Fl f Ns Ar ign-macro
-Ignore unknown macros at the start of input lines (default for 
-.Xr man 7
-parsing).
+This is the default, but the option can be used to override an earlier
+.Fl f Ns Ar strict .
+.
+.It Fl f Ns Ar no-ign-escape
+Don't ignore invalid escape sequences.
+.
 .It Fl f Ns Ar no-ign-macro
-Do not ignore unknown macros at the start of input lines (default for 
-.Xr mdoc 7
-parsing).
+Do not ignore unknown macros at the start of input lines.
+.
+.It Fl f Ns Ar no-ign-chars
+Do not ignore disallowed characters.
+.
+.It Fl f Ns Ar strict
+Implies
+.Fl f Ns Ar no-ign-escape ,
+.Fl f Ns Ar no-ign-macro
+and
+.Fl f Ns Ar no-ign-chars .
+.
+.It Fl f Ns Ar ign-errors
+Don't halt when encountering parse errors.  Useful with
+.Fl T Ns Ar lint
+over a large set of manuals passed on the command line.
 .El
-.\" PARAGRAPH
+.
+.
+.Ss Output Options
+For the time being, only
+.Fl T Ns Ar html
+accepts output options:
+.Bl -tag -width Ds
+.It Fl O Ns Ar style=style.css
+The file
+.Ar style.css
+is used for an external style-sheet.  This must be a valid absolute or
+relative URI.
+.It Fl O Ns Ar includes=fmt
+The string
+.Ar fmt ,
+for example,
+.Ar ../src/%I.html ,
+is used as a template for linked header files (usually via the
+.Sq \&In
+macro).  Instances of
+.Sq \&%I
+are replaced with the include filename.  The default is not to present a
+hyperlink.
+.It Fl O Ns Ar man=fmt
+The string
+.Ar fmt ,
+for example,
+.Ar ../html%S/%N.%S.html ,
+is used as a template for linked manuals (usually via the
+.Sq \&Xr
+macro).  Instances of
+.Sq \&%N
+and
+.Sq %S
+are replaced with the linked manual's name and section, respectively.
+If no section is included, section 1 is assumed.  The default is not to
+present a hyperlink.
+.El
+.
+.
+.Sh OUTPUT
+This section documents output details of
+.Nm .
+In general, output conforms to the traditional manual style of a header,
+a body composed of sections and sub-sections, and a footer.
 .Pp
-As with the
-.Fl W
-flag, multiple
-.Fl f
-options may be grouped and delimited with a comma.  Using
-.Fl f Ns Ar ign-scope,ign-escape ,
-for example, will try to ignore scope and character-escape errors.
-.\" SECTION
+The text style of output characters (non-macro characters, punctuation,
+and white-space) is dictated by context.
+.Pp
+White-space is generally stripped from input.  This can be changed with
+character escapes (specified in
+.Xr mandoc_char 7 )
+or literal modes (specified in
+.Xr mdoc 7
+and
+.Xr man 7 ) .
+.Pp
+If non-macro punctuation is set apart from words, such as in the phrase
+.Dq to be \&, or not to be ,
+it's processed by
+.Nm ,
+regardless of output format, according to the following rules:  opening
+punctuation
+.Po
+.Sq \&( ,
+.Sq \&[ ,
+and
+.Sq \&{
+.Pc
+is not followed by a space; closing punctuation
+.Po
+.Sq \&. ,
+.Sq \&, ,
+.Sq \&; ,
+.Sq \&: ,
+.Sq \&? ,
+.Sq \&! ,
+.Sq \&) ,
+.Sq \&]
+and
+.Sq \&}
+.Pc
+is not preceded by white-space.
+.
+.Pp
+If the input is
+.Xr mdoc 7 ,
+however, these rules are also applied to macro arguments when appropriate.
+.
+.
+.Ss ASCII Output
+Output produced by
+.Fl T Ns Ar ascii ,
+which is the default, is rendered in standard 7-bit ASCII documented in
+.Xr ascii 7 .
+.Pp
+Font styles are applied by using back-spaced encoding such that an
+underlined character
+.Sq c
+is rendered as
+.Sq _ Ns \e[bs] Ns c ,
+where
+.Sq \e[bs]
+is the back-space character number 8.  Emboldened characters are rendered as
+.Sq c Ns \e[bs] Ns c .
+.Pp
+The special characters documented in
+.Xr mandoc_char 7
+are rendered best-effort in an ASCII equivalent.
+.Pp
+Output width is limited to 78 visible columns unless literal input lines
+exceed this limit.
+.
+.
+.Ss HTML Output
+Output produced by
+.Fl T Ns Ar html
+conforms to HTML-4.01 strict.
+.Pp
+Font styles and page structure are applied using CSS2.  By default, no
+font style is applied to any text, although CSS2 is hard-coded to format
+the basic structure of output.
+.Pp
+The
+.Pa example.style.css
+file documents the range of styles applied to output and, if used, will
+cause rendered documents to appear as they do in
+.Fl T Ns Ar ascii .
+.Pp
+Special characters are rendered in decimal-encoded UTF-8.
+.
+.
+.Ss XHTML Output
+Output produced by
+.Fl T Ns Ar xhtml
+conforms to XHTML-1.0 strict.
+.Pp
+See
+.Sx HTML Output
+for details; beyond generating XHTML tags instead of HTML tags, these
+output modes are identical.
+.
+.
 .Sh EXAMPLES
 To page manuals to the terminal:
-.\" PARAGRAPH
+.
 .Pp
-.D1 % mandoc \-Wall,error mandoc.1 2>&1 | less
-.Pp
+.D1 % mandoc \-Wall,error \-fstrict mandoc.1 2>&1 | less
 .D1 % mandoc mandoc.1 mdoc.3 mdoc.7 | less
-.\" SECTION
+.
+.Pp
+To produce HTML manuals with
+.Ar style.css
+as the style-sheet:
+.Pp
+.D1 % mandoc \-Thtml -Ostyle=style.css mdoc.7 > mdoc.7.html
+.Pp
+To check over a large set of manuals:
+.
+.Pp
+.Dl % mandoc \-Tlint \-fign-errors `find /usr/src -name \e*\e.[1-9]`
+.
+.
+.Sh COMPATIBILITY
+This section summarises
+.Nm
+compatibility with
+.Xr groff 1 .
+Each input and output format is separately noted.
+.
+.
+.Ss ASCII Compatibility
+.Bl -bullet -compact
+.It
+The
+.Sq \e~
+special character doesn't produce expected behaviour in
+.Fl T Ns Ar ascii .
+.
+.It
+The
+.Sq \&Bd \-literal
+and
+.Sq \&Bd \-unfilled
+macros of
+.Xr mdoc 7
+in
+.Fl T Ns Ar ascii
+are synonyms, as are \-filled and \-ragged.
+.
+.It
+In
+.Xr groff 1 ,
+the
+.Sq \&Pa
+.Xr mdoc 7
+macro does not underline when scoped under an
+.Sq \&It
+in the FILES section.  This behaves correctly in
+.Nm .
+.
+.It
+A list or display following
+.Sq \&Ss
+.Xr mdoc 7
+macro in
+.Fl T Ns Ar ascii
+does not assert a prior vertical break, just as it doesn't with
+.Sq \&Sh .
+.
+.It
+The
+.Sq \&na
+.Xr man 7
+macro in
+.Fl T Ns Ar ascii
+has no effect.
+.
+.It
+Words aren't hyphenated.
+.
+.It
+In normal mode (not a literal block), blocks of spaces aren't preserved,
+so double spaces following sentence closure are reduced to a single space;
+.Xr groff 1
+retains spaces.
+.
+.It
+Sentences are unilaterally monospaced.
+.El
+.
+.
+.Ss HTML/XHTML Compatibility
+.Bl -bullet -compact
+.It
+The
+.Sq \efP
+escape will revert the font to the previous
+.Sq \ef
+escape, not to the last rendered decoration, which is now dictated by
+CSS instead of hard-coded.  It also will not span past the current
+scope, for the same reason.  Note that in
+.Sx ASCII Output
+mode, this will work fine.
+.It
+The
+.Xr mdoc 7
+.Sq \&Bl \-hang
+and
+.Sq \&Bl \-tag
+list types render similarly (no break following overreached left-hand
+side) due to the expressive constraints of HTML.
+.
+.It
+The
+.Xr man 7
+.Sq IP
+and
+.Sq TP
+lists render similarly.
+.El
+.
+.
 .Sh SEE ALSO
 .Xr mandoc_char 7 ,
 .Xr mdoc 7 ,
 .Xr man 7
-.\" 
+.
 .Sh AUTHORS
 The
 .Nm
-utility was written by 
+utility was written by
 .An Kristaps Dzonsons Aq kristaps@kth.se .
-.\" SECTION
+.
+.
 .Sh CAVEATS
-The 
-.Nm
-utility in
-.Fl T Ns Ar ascii
-mode doesn't yet know how to display the following:
+The
+.Fl T Ns Ar html
+and
+.Fl T Ns Ar xhtml
+CSS2 styling used for
+.Fl m Ns Ar doc
+input lists does not render properly in brain-dead browsers, such as
+Internet Explorer 6 and earlier.
 .Pp
-.Bl -bullet -compact
-.It
-The \-hang 
-.Sq \&.Bl
-list is not yet supported.
-.El
+In
+.Fl T Ns Ar html
+and
+.Fl T Ns Ar xhtml ,
+the maximum size of an element attribute is determined by
+.Dv BUFSIZ ,
+which is usually 1024 bytes.  Be aware of this when setting long link
+formats, e.g.,
+.Fl O Ns Ar style=really/long/link .
 .Pp
-Other macros still aren't supported by virtue of nobody complaining
-about their absence.  Please report any omissions: this is a work in
-progress.
-.Pp
-The following list documents differences between traditional
-.Xr nroff 1
-output and
-.Nm :
-.Pp
-.Bl -bullet -compact
-.It 
-A list of display following
-.Sq \&.Ss
-does not assert a prior vertical break, just as it doesn't with
-.Sq \&.Sh .
-.It
-Special characters don't follow the current font style.
-.\" LIST-ITEM
-.It
-The \-literal and \-unfilled 
-.Sq \&.Bd
-displays types are synonyms, as are \-filled and \-ragged.
-.El
+The
+.Fl T Ns Ar html
+and
+.Fl T Ns Ar xhtml
+output modes don't render the
+.Sq \es
+font size escape documented in
+.Xr mdoc 7
+and
+.Xr man 7 .