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1 | # Pod::Man -- Convert POD data to formatted *roff input. |
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2 | # $Id: Man.pm,v 0.8 1999/10/07 09:39:37 eagle Exp $ |
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3 | # |
| 4 | # Copyright 1999 by Russ Allbery <rra@stanford.edu> |
| 5 | # |
| 6 | # This program is free software; you can redistribute it and/or modify it |
| 7 | # under the same terms as Perl itself. |
| 8 | # |
| 9 | # This module is intended to be a replacement for pod2man, and attempts to |
| 10 | # match its output except for some specific circumstances where other |
| 11 | # decisions seemed to produce better output. It uses Pod::Parser and is |
| 12 | # designed to be very easy to subclass. |
| 13 | |
| 14 | ############################################################################ |
| 15 | # Modules and declarations |
| 16 | ############################################################################ |
| 17 | |
| 18 | package Pod::Man; |
| 19 | |
| 20 | require 5.004; |
| 21 | |
| 22 | use Carp qw(carp croak); |
| 23 | use Pod::Parser (); |
| 24 | |
| 25 | use strict; |
| 26 | use subs qw(makespace); |
| 27 | use vars qw(@ISA %ESCAPES $PREAMBLE $VERSION); |
| 28 | |
| 29 | @ISA = qw(Pod::Parser); |
| 30 | |
| 2e20e14f |
31 | ($VERSION = (split (' ', q$Revision: 0.8 $ ))[1]) =~ s/\.(\d)$/.0$1/; |
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32 | |
| 33 | |
| 34 | ############################################################################ |
| 35 | # Preamble and *roff output tables |
| 36 | ############################################################################ |
| 37 | |
| 38 | # The following is the static preamble which starts all *roff output we |
| 39 | # generate. It's completely static except for the font to use as a |
| 40 | # fixed-width font, which is designed by @CFONT@. $PREAMBLE should |
| 41 | # therefore be run through s/\@CFONT\@/<font>/g before output. |
| 42 | $PREAMBLE = <<'----END OF PREAMBLE----'; |
| 43 | .de Sh \" Subsection heading |
| 44 | .br |
| 45 | .if t .Sp |
| 46 | .ne 5 |
| 47 | .PP |
| 48 | \fB\\$1\fR |
| 49 | .PP |
| 50 | .. |
| 51 | .de Sp \" Vertical space (when we can't use .PP) |
| 52 | .if t .sp .5v |
| 53 | .if n .sp |
| 54 | .. |
| 55 | .de Ip \" List item |
| 56 | .br |
| 57 | .ie \\n(.$>=3 .ne \\$3 |
| 58 | .el .ne 3 |
| 59 | .IP "\\$1" \\$2 |
| 60 | .. |
| 61 | .de Vb \" Begin verbatim text |
| 62 | .ft @CFONT@ |
| 63 | .nf |
| 64 | .ne \\$1 |
| 65 | .. |
| 66 | .de Ve \" End verbatim text |
| 67 | .ft R |
| 68 | |
| 69 | .fi |
| 70 | .. |
| 71 | .\" Set up some character translations and predefined strings. \*(-- will |
| 72 | .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left |
| 73 | .\" double quote, and \*(R" will give a right double quote. | will give a |
| 74 | .\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used |
| 75 | .\" to do unbreakable dashes and therefore won't be available. \*(C` and |
| 76 | .\" \*(C' expand to `' in nroff, nothing in troff, for use with C<> |
| 77 | .tr \(*W-|\(bv\*(Tr |
| 78 | .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' |
| 79 | .ie n \{\ |
| 80 | . ds -- \(*W- |
| 81 | . ds PI pi |
| 82 | . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch |
| 83 | . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch |
| 84 | . ds L" "" |
| 85 | . ds R" "" |
| 86 | . ds C` ` |
| 87 | . ds C' ' |
| 88 | 'br\} |
| 89 | .el\{\ |
| 90 | . ds -- \|\(em\| |
| 91 | . ds PI \(*p |
| 92 | . ds L" `` |
| 93 | . ds R" '' |
| 94 | 'br\} |
| 95 | .\" |
| 96 | .\" If the F register is turned on, we'll generate index entries on stderr |
| 97 | .\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and |
| 98 | .\" index entries marked with X<> in POD. Of course, you'll have to process |
| 99 | .\" the output yourself in some meaningful fashion. |
| 100 | .if \nF \{\ |
| 101 | . de IX |
| 102 | . tm Index:\\$1\t\\n%\t"\\$2" |
| 103 | . . |
| 104 | . nr % 0 |
| 105 | . rr F |
| 106 | .\} |
| 107 | .\" |
| 108 | .\" For nroff, turn off justification. Always turn off hyphenation; it |
| 109 | .\" makes way too many mistakes in technical documents. |
| 110 | .hy 0 |
| 111 | .if n .na |
| 112 | .\" |
| 113 | .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). |
| 114 | .\" Fear. Run. Save yourself. No user-serviceable parts. |
| 115 | .bd B 3 |
| 116 | . \" fudge factors for nroff and troff |
| 117 | .if n \{\ |
| 118 | . ds #H 0 |
| 119 | . ds #V .8m |
| 120 | . ds #F .3m |
| 121 | . ds #[ \f1 |
| 122 | . ds #] \fP |
| 123 | .\} |
| 124 | .if t \{\ |
| 125 | . ds #H ((1u-(\\\\n(.fu%2u))*.13m) |
| 126 | . ds #V .6m |
| 127 | . ds #F 0 |
| 128 | . ds #[ \& |
| 129 | . ds #] \& |
| 130 | .\} |
| 131 | . \" simple accents for nroff and troff |
| 132 | .if n \{\ |
| 133 | . ds ' \& |
| 134 | . ds ` \& |
| 135 | . ds ^ \& |
| 136 | . ds , \& |
| 137 | . ds ~ ~ |
| 138 | . ds / |
| 139 | .\} |
| 140 | .if t \{\ |
| 141 | . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" |
| 142 | . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' |
| 143 | . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' |
| 144 | . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' |
| 145 | . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' |
| 146 | . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' |
| 147 | .\} |
| 148 | . \" troff and (daisy-wheel) nroff accents |
| 149 | .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' |
| 150 | .ds 8 \h'\*(#H'\(*b\h'-\*(#H' |
| 151 | .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] |
| 152 | .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' |
| 153 | .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' |
| 154 | .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] |
| 155 | .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] |
| 156 | .ds ae a\h'-(\w'a'u*4/10)'e |
| 157 | .ds Ae A\h'-(\w'A'u*4/10)'E |
| 158 | . \" corrections for vroff |
| 159 | .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' |
| 160 | .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' |
| 161 | . \" for low resolution devices (crt and lpr) |
| 162 | .if \n(.H>23 .if \n(.V>19 \ |
| 163 | \{\ |
| 164 | . ds : e |
| 165 | . ds 8 ss |
| 166 | . ds o a |
| 167 | . ds d- d\h'-1'\(ga |
| 168 | . ds D- D\h'-1'\(hy |
| 169 | . ds th \o'bp' |
| 170 | . ds Th \o'LP' |
| 171 | . ds ae ae |
| 172 | . ds Ae AE |
| 173 | .\} |
| 174 | .rm #[ #] #H #V #F C |
| 175 | ----END OF PREAMBLE---- |
| 176 | |
| 177 | # This table is taken nearly verbatim from Tom Christiansen's pod2man. It |
| 178 | # assumes that the standard preamble has already been printed, since that's |
| 179 | # what defines all of the accent marks. Note that some of these are quoted |
| 180 | # with double quotes since they contain embedded single quotes, so use \\ |
| 181 | # uniformly for backslash for readability. |
| 182 | %ESCAPES = ( |
| 183 | 'amp' => '&', # ampersand |
| 184 | 'lt' => '<', # left chevron, less-than |
| 185 | 'gt' => '>', # right chevron, greater-than |
| 186 | 'quot' => '"', # double quote |
| 187 | |
| 188 | 'Aacute' => "A\\*'", # capital A, acute accent |
| 189 | 'aacute' => "a\\*'", # small a, acute accent |
| 190 | 'Acirc' => 'A\\*^', # capital A, circumflex accent |
| 191 | 'acirc' => 'a\\*^', # small a, circumflex accent |
| 192 | 'AElig' => '\*(AE', # capital AE diphthong (ligature) |
| 193 | 'aelig' => '\*(ae', # small ae diphthong (ligature) |
| 194 | 'Agrave' => "A\\*`", # capital A, grave accent |
| 195 | 'agrave' => "A\\*`", # small a, grave accent |
| 196 | 'Aring' => 'A\\*o', # capital A, ring |
| 197 | 'aring' => 'a\\*o', # small a, ring |
| 198 | 'Atilde' => 'A\\*~', # capital A, tilde |
| 199 | 'atilde' => 'a\\*~', # small a, tilde |
| 200 | 'Auml' => 'A\\*:', # capital A, dieresis or umlaut mark |
| 201 | 'auml' => 'a\\*:', # small a, dieresis or umlaut mark |
| 202 | 'Ccedil' => 'C\\*,', # capital C, cedilla |
| 203 | 'ccedil' => 'c\\*,', # small c, cedilla |
| 204 | 'Eacute' => "E\\*'", # capital E, acute accent |
| 205 | 'eacute' => "e\\*'", # small e, acute accent |
| 206 | 'Ecirc' => 'E\\*^', # capital E, circumflex accent |
| 207 | 'ecirc' => 'e\\*^', # small e, circumflex accent |
| 208 | 'Egrave' => 'E\\*`', # capital E, grave accent |
| 209 | 'egrave' => 'e\\*`', # small e, grave accent |
| 210 | 'ETH' => '\\*(D-', # capital Eth, Icelandic |
| 211 | 'eth' => '\\*(d-', # small eth, Icelandic |
| 212 | 'Euml' => 'E\\*:', # capital E, dieresis or umlaut mark |
| 213 | 'euml' => 'e\\*:', # small e, dieresis or umlaut mark |
| 214 | 'Iacute' => "I\\*'", # capital I, acute accent |
| 215 | 'iacute' => "i\\*'", # small i, acute accent |
| 216 | 'Icirc' => 'I\\*^', # capital I, circumflex accent |
| 217 | 'icirc' => 'i\\*^', # small i, circumflex accent |
| 218 | 'Igrave' => 'I\\*`', # capital I, grave accent |
| 219 | 'igrave' => 'i\\*`', # small i, grave accent |
| 220 | 'Iuml' => 'I\\*:', # capital I, dieresis or umlaut mark |
| 221 | 'iuml' => 'i\\*:', # small i, dieresis or umlaut mark |
| 222 | 'Ntilde' => 'N\*~', # capital N, tilde |
| 223 | 'ntilde' => 'n\*~', # small n, tilde |
| 224 | 'Oacute' => "O\\*'", # capital O, acute accent |
| 225 | 'oacute' => "o\\*'", # small o, acute accent |
| 226 | 'Ocirc' => 'O\\*^', # capital O, circumflex accent |
| 227 | 'ocirc' => 'o\\*^', # small o, circumflex accent |
| 228 | 'Ograve' => 'O\\*`', # capital O, grave accent |
| 229 | 'ograve' => 'o\\*`', # small o, grave accent |
| 230 | 'Oslash' => 'O\\*/', # capital O, slash |
| 231 | 'oslash' => 'o\\*/', # small o, slash |
| 232 | 'Otilde' => 'O\\*~', # capital O, tilde |
| 233 | 'otilde' => 'o\\*~', # small o, tilde |
| 234 | 'Ouml' => 'O\\*:', # capital O, dieresis or umlaut mark |
| 235 | 'ouml' => 'o\\*:', # small o, dieresis or umlaut mark |
| 236 | 'szlig' => '\*8', # small sharp s, German (sz ligature) |
| 237 | 'THORN' => '\\*(Th', # capital THORN, Icelandic |
| 238 | 'thorn' => '\\*(th', # small thorn, Icelandic |
| 239 | 'Uacute' => "U\\*'", # capital U, acute accent |
| 240 | 'uacute' => "u\\*'", # small u, acute accent |
| 241 | 'Ucirc' => 'U\\*^', # capital U, circumflex accent |
| 242 | 'ucirc' => 'u\\*^', # small u, circumflex accent |
| 243 | 'Ugrave' => 'U\\*`', # capital U, grave accent |
| 244 | 'ugrave' => 'u\\*`', # small u, grave accent |
| 245 | 'Uuml' => 'U\\*:', # capital U, dieresis or umlaut mark |
| 246 | 'uuml' => 'u\\*:', # small u, dieresis or umlaut mark |
| 247 | 'Yacute' => "Y\\*'", # capital Y, acute accent |
| 248 | 'yacute' => "y\\*'", # small y, acute accent |
| 249 | 'yuml' => 'y\\*:', # small y, dieresis or umlaut mark |
| 250 | ); |
| 251 | |
| 252 | |
| 253 | ############################################################################ |
| 254 | # Static helper functions |
| 255 | ############################################################################ |
| 256 | |
| 257 | # Protect leading quotes and periods against interpretation as commands. |
| 258 | sub protect { local $_ = shift; s/^([.\'])/\\&$1/mg; $_ } |
| 259 | |
| 260 | # Given a command and a single argument that may or may not contain double |
| 261 | # quotes, handle double-quote formatting for it. If there are no double |
| 262 | # quotes, just return the command followed by the argument in double quotes. |
| 263 | # If there are double quotes, use an if statement to test for nroff, and for |
| 264 | # nroff output the command followed by the argument in double quotes with |
| 265 | # embedded double quotes doubled. For other formatters, remap paired double |
| 266 | # quotes to `` and ''. |
| 267 | sub switchquotes { |
| 268 | my $command = shift; |
| 269 | local $_ = shift; |
| 270 | my $extra = shift; |
| 271 | s/\\\*\([LR]\"/\"/g; |
| 272 | if (/\"/) { |
| 273 | s/\"/\"\"/g; |
| 274 | my $troff = $_; |
| 275 | $troff =~ s/\"\"([^\"]*)\"\"/\`\`$1\'\'/g; |
| 276 | s/\"/\"\"/g if $extra; |
| 277 | $troff =~ s/\"/\"\"/g if $extra; |
| 278 | $_ = qq("$_") . ($extra ? " $extra" : ''); |
| 279 | $troff = qq("$troff") . ($extra ? " $extra" : ''); |
| 280 | return ".if n $command $_\n.el $command $troff\n"; |
| 281 | } else { |
| 282 | $_ = qq("$_") . ($extra ? " $extra" : ''); |
| 283 | return "$command $_\n"; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | # Translate a font string into an escape. |
| 288 | sub toescape { (length ($_[0]) > 1 ? '\f(' : '\f') . $_[0] } |
| 289 | |
| 290 | |
| 291 | ############################################################################ |
| 292 | # Initialization |
| 293 | ############################################################################ |
| 294 | |
| 295 | # Initialize the object. Here, we also process any additional options |
| 296 | # passed to the constructor or set up defaults if none were given. center |
| 297 | # is the centered title, release is the version number, and date is the date |
| 298 | # for the documentation. Note that we can't know what file name we're |
| 299 | # processing due to the architecture of Pod::Parser, so that *has* to either |
| 300 | # be passed to the constructor or set separately with Pod::Man::name(). |
| 301 | sub initialize { |
| 302 | my $self = shift; |
| 303 | |
| 304 | # Figure out the fixed-width font. If user-supplied, make sure that |
| 305 | # they are the right length. |
| 306 | for (qw/fixed fixedbold fixeditalic fixedbolditalic/) { |
| 307 | if (defined $$self{$_}) { |
| 308 | if (length ($$self{$_}) < 1 || length ($$self{$_}) > 2) { |
| 309 | croak "roff font should be 1 or 2 chars, not `$$self{$_}'"; |
| 310 | } |
| 311 | } else { |
| 312 | $$self{$_} = ''; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | # Set the default fonts. We can't be sure what fixed bold-italic is |
| 317 | # going to be called, so default to just bold. |
| 318 | $$self{fixed} ||= 'CW'; |
| 319 | $$self{fixedbold} ||= 'CB'; |
| 320 | $$self{fixeditalic} ||= 'CI'; |
| 321 | $$self{fixedbolditalic} ||= 'CB'; |
| 322 | |
| 323 | # Set up a table of font escapes. First number is fixed-width, second |
| 324 | # is bold, third is italic. |
| 325 | $$self{FONTS} = { '000' => '\fR', '001' => '\fI', |
| 326 | '010' => '\fB', '011' => '\f(BI', |
| 327 | '100' => toescape ($$self{fixed}), |
| 328 | '101' => toescape ($$self{fixeditalic}), |
| 329 | '110' => toescape ($$self{fixedbold}), |
| 330 | '111' => toescape ($$self{fixedbolditalic})}; |
| 331 | |
| 332 | # Extra stuff for page titles. |
| 333 | $$self{center} = 'User Contributed Perl Documentation' |
| 334 | unless defined $$self{center}; |
| 335 | $$self{indent} = 4 unless defined $$self{indent}; |
| 336 | |
| 337 | # We used to try first to get the version number from a local binary, |
| 338 | # but we shouldn't need that any more. Get the version from the running |
| 339 | # Perl. |
| 340 | if (!defined $$self{release}) { |
| 341 | my ($version, $patch) = ($] =~ /^(.{5})(\d{2})?/); |
| 342 | $$self{release} = "perl $version"; |
| 343 | $$self{release} .= ", patch $patch" if $patch; |
| 344 | } |
| 345 | |
| 346 | # Double quotes in things that will be quoted. |
| 347 | for (qw/center date release/) { $$self{$_} =~ s/\"/\"\"/g } |
| 348 | |
| 349 | $$self{INDENT} = 0; # Current indentation level. |
| 350 | $$self{INDENTS} = []; # Stack of indentations. |
| 351 | $$self{INDEX} = []; # Index keys waiting to be printed. |
| 352 | |
| 353 | $self->SUPER::initialize; |
| 354 | } |
| 355 | |
| 356 | # For each document we process, output the preamble first. Note that the |
| 357 | # fixed width font is a global default; once we interpolate it into the |
| 358 | # PREAMBLE, it ain't ever changing. Maybe fix this later. |
| 359 | sub begin_pod { |
| 360 | my $self = shift; |
| 361 | |
| 362 | # Try to figure out the name and section from the file name. |
| 363 | my $section = $$self{section} || 1; |
| 364 | my $name = $$self{name}; |
| 365 | if (!defined $name) { |
| 366 | $name = $self->input_file; |
| 367 | $section = 3 if (!$$self{section} && $name =~ /\.pm$/i); |
| 368 | $name =~ s/\.p(od|[lm])$//i; |
| 369 | if ($section =~ /^1/) { |
| 370 | require File::Basename; |
| 371 | $name = uc File::Basename::basename ($name); |
| 372 | } else { |
| 373 | # Lose everything up to the first of |
| 374 | # */lib/*perl* standard or site_perl module |
| 375 | # */*perl*/lib from -D prefix=/opt/perl |
| 376 | # */*perl*/ random module hierarchy |
| 377 | # which works. Should be fixed to use File::Spec. |
| 378 | for ($name) { |
| 379 | s%//+%/%g; |
| 380 | if ( s%^.*?/lib/[^/]*perl[^/]*/%%i |
| 381 | or s%^.*?/[^/]*perl[^/]*/(?:lib/)?%%i) { |
| 382 | s%^site(_perl)?/%%; # site and site_perl |
| 383 | s%^(.*-$^O|$^O-.*)/%%o; # arch |
| 384 | s%^\d+\.\d+%%; # version |
| 385 | } |
| 386 | s%/%::%g; |
| 387 | } |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | # Modification date header. Try to use the modification time of our |
| 392 | # input. |
| 393 | if (!defined $$self{date}) { |
| 394 | my $time = (stat $self->input_file)[9] || time; |
| 395 | my ($day, $month, $year) = (localtime $time)[3,4,5]; |
| 396 | $month++; |
| 397 | $year += 1900; |
| 398 | $$self{date} = join ('-', $year, $month, $day); |
| 399 | } |
| 400 | |
| 401 | # Now, print out the preamble and the title. |
| 402 | $PREAMBLE =~ s/\@CFONT\@/$$self{fixed}/; |
| 403 | chomp $PREAMBLE; |
| 404 | print { $self->output_handle } <<"----END OF HEADER----"; |
| 405 | .\\" Automatically generated by Pod::Man version $VERSION |
| 406 | .\\" @{[ scalar localtime ]} |
| 407 | .\\" |
| 408 | .\\" Standard preamble: |
| 409 | .\\" ====================================================================== |
| 410 | $PREAMBLE |
| 411 | .\\" ====================================================================== |
| 412 | .\\" |
| 413 | .IX Title "$name $section" |
| 414 | .TH $name $section "$$self{release}" "$$self{date}" "$$self{center}" |
| 415 | .UC |
| 416 | ----END OF HEADER---- |
| 417 | #"# for cperl-mode |
| 418 | |
| 419 | # Initialize a few per-file variables. |
| 420 | $$self{INDENT} = 0; |
| 421 | $$self{NEEDSPACE} = 0; |
| 422 | } |
| 423 | |
| 424 | |
| 425 | ############################################################################ |
| 426 | # Core overrides |
| 427 | ############################################################################ |
| 428 | |
| 429 | # Called for each command paragraph. Gets the command, the associated |
| 430 | # paragraph, the line number, and a Pod::Paragraph object. Just dispatches |
| 431 | # the command to a method named the same as the command. =cut is handled |
| 432 | # internally by Pod::Parser. |
| 433 | sub command { |
| 434 | my $self = shift; |
| 435 | my $command = shift; |
| 436 | return if $command eq 'pod'; |
| 437 | return if ($$self{EXCLUDE} && $command ne 'end'); |
| 438 | $command = 'cmd_' . $command; |
| 439 | $self->$command (@_); |
| 440 | } |
| 441 | |
| 442 | # Called for a verbatim paragraph. Gets the paragraph, the line number, and |
| 443 | # a Pod::Paragraph object. Rofficate backslashes, untabify, put a |
| 444 | # zero-width character at the beginning of each line to protect against |
| 445 | # commands, and wrap in .Vb/.Ve. |
| 446 | sub verbatim { |
| 447 | my $self = shift; |
| 448 | return if $$self{EXCLUDE}; |
| 449 | local $_ = shift; |
| 450 | return if /^\s+$/; |
| 451 | s/\s+$/\n/; |
| 452 | my $lines = tr/\n/\n/; |
| 453 | 1 while s/^(.*?)(\t+)/$1 . ' ' x (length ($2) * 8 - length ($1) % 8)/me; |
| 454 | s/\\/\\e/g; |
| 455 | s/^(\s*\S)/'\&' . $1/gme; |
| 456 | $self->makespace if $$self{NEEDSPACE}; |
| 457 | $self->output (".Vb $lines\n$_.Ve\n"); |
| 458 | $$self{NEEDSPACE} = 0; |
| 459 | } |
| 460 | |
| 461 | # Called for a regular text block. Gets the paragraph, the line number, and |
| 462 | # a Pod::Paragraph object. Perform interpolation and output the results. |
| 463 | sub textblock { |
| 464 | my $self = shift; |
| 465 | return if $$self{EXCLUDE}; |
| 466 | $self->output ($_[0]), return if $$self{VERBATIM}; |
| 467 | |
| 468 | # Perform a little magic to collapse multiple L<> references. We'll |
| 469 | # just rewrite the whole thing into actual text at this part, bypassing |
| 470 | # the whole internal sequence parsing thing. |
| 471 | s{ |
| 472 | (L< # A link of the form L</something>. |
| 473 | / |
| 474 | ( |
| 475 | [:\w]+ # The item has to be a simple word... |
| 476 | (\(\))? # ...or simple function. |
| 477 | ) |
| 478 | > |
| 479 | ( |
| 480 | ,?\s+(and\s+)? # Allow lots of them, conjuncted. |
| 481 | L< |
| 482 | / |
| 483 | ( [:\w]+ ( \(\) )? ) |
| 484 | > |
| 485 | )+ |
| 486 | ) |
| 487 | } { |
| 488 | local $_ = $1; |
| 489 | s{ L< / ([^>]+ ) } {$1}g; |
| 490 | my @items = split /(?:,?\s+(?:and\s+)?)/; |
| 491 | my $string = "the "; |
| 492 | my $i; |
| 493 | for ($i = 0; $i < @items; $i++) { |
| 494 | $string .= $items[$i]; |
| 495 | $string .= ", " if @items > 2 && $i != $#items; |
| 496 | $string .= " and " if ($i == $#items - 1); |
| 497 | } |
| 498 | $string .= " entries elsewhere in this document"; |
| 499 | $string; |
| 500 | }gex; |
| 501 | |
| 502 | # Parse the tree and output it. collapse knows about references to |
| 503 | # scalars as well as scalars and does the right thing with them. |
| 504 | local $_ = $self->parse (@_); |
| 505 | s/\n\s*$/\n/; |
| 506 | $self->makespace if $$self{NEEDSPACE}; |
| 507 | $self->output (protect $self->mapfonts ($_)); |
| 508 | $self->outindex; |
| 509 | $$self{NEEDSPACE} = 1; |
| 510 | } |
| 511 | |
| 512 | # Called for an interior sequence. Takes a Pod::InteriorSequence object and |
| 513 | # returns a reference to a scalar. This scalar is the final formatted text. |
| 514 | # It's returned as a reference so that other interior sequences above us |
| 515 | # know that the text has already been processed. |
| 516 | sub sequence { |
| 517 | my ($self, $seq) = @_; |
| 518 | my $command = $seq->cmd_name; |
| 519 | |
| 520 | # Zero-width characters. |
| f5daac4a |
521 | if ($command eq 'Z') { |
| 522 | my $v = '\&'; return bless \ $v, 'Pod::Man::String'; |
| 523 | } |
| 9741dab0 |
524 | |
| 525 | # C<>, L<>, X<>, and E<> don't apply guesswork to their contents. |
| 526 | local $_ = $self->collapse ($seq->parse_tree, $command =~ /^[CELX]$/); |
| 527 | |
| 528 | # Handle E<> escapes. |
| 529 | if ($command eq 'E') { |
| 2e20e14f |
530 | if (/^\d+$/) { |
| 531 | return bless \ chr ($_), 'Pod::Man::String'; |
| 532 | } elsif (exists $ESCAPES{$_}) { |
| 9741dab0 |
533 | return bless \ "$ESCAPES{$_}", 'Pod::Man::String'; |
| 534 | } else { |
| 535 | carp "Unknown escape E<$1>"; |
| 536 | return bless \ "E<$_>", 'Pod::Man::String'; |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | # For all the other sequences, empty content produces no output. |
| 541 | return '' if $_ eq ''; |
| 542 | |
| 543 | # Handle formatting sequences. |
| 544 | if ($command eq 'B') { |
| 545 | return bless \ ('\f(BS' . $_ . '\f(BE'), 'Pod::Man::String'; |
| 546 | } elsif ($command eq 'F') { |
| 547 | return bless \ ('\f(IS' . $_ . '\f(IE'), 'Pod::Man::String'; |
| 548 | } elsif ($command eq 'I') { |
| 549 | return bless \ ('\f(IS' . $_ . '\f(IE'), 'Pod::Man::String'; |
| 550 | } elsif ($command eq 'C') { |
| 551 | s/-/\\-/g; |
| 552 | s/__/_\\|_/g; |
| 553 | return bless \ ('\f(FS\*(C`' . $_ . "\\*(C'\\f(FE"), |
| 554 | 'Pod::Man::String'; |
| 555 | } |
| 556 | |
| 557 | # Handle links. |
| 558 | if ($command eq 'L') { |
| f5daac4a |
559 | # XXX bug in lvalue subroutines prevents this from working |
| 560 | #return bless \ ($self->buildlink ($_)), 'Pod::Man::String'; |
| 561 | my $v = $self->buildlink($_); |
| 562 | return bless \$v, 'Pod::Man::String'; |
| 9741dab0 |
563 | } |
| 564 | |
| 565 | # Whitespace protection replaces whitespace with "\ ". |
| 566 | if ($command eq 'S') { |
| 567 | s/\s+/\\ /g; |
| 568 | return bless \ "$_", 'Pod::Man::String'; |
| 569 | } |
| 570 | |
| 571 | # Add an index entry to the list of ones waiting to be output. |
| 572 | if ($command eq 'X') { push (@{ $$self{INDEX} }, $_); return '' } |
| 573 | |
| 574 | # Anything else is unknown. |
| 575 | carp "Unknown sequence $command<$_>"; |
| 576 | } |
| 577 | |
| 578 | |
| 579 | ############################################################################ |
| 580 | # Command paragraphs |
| 581 | ############################################################################ |
| 582 | |
| 583 | # All command paragraphs take the paragraph and the line number. |
| 584 | |
| 585 | # First level heading. We can't output .IX in the NAME section due to a bug |
| 586 | # in some versions of catman, so don't output a .IX for that section. .SH |
| 587 | # already uses small caps, so remove any E<> sequences that would cause |
| 588 | # them. |
| 589 | sub cmd_head1 { |
| 590 | my $self = shift; |
| 591 | local $_ = $self->parse (@_); |
| 592 | s/\s+$//; |
| 593 | s/\\s-?\d//g; |
| 594 | $self->output (switchquotes ('.SH', $self->mapfonts ($_))); |
| 595 | $self->outindex (($_ eq 'NAME') ? () : ('Header', $_)); |
| 596 | $$self{NEEDSPACE} = 0; |
| 597 | } |
| 598 | |
| 599 | # Second level heading. |
| 600 | sub cmd_head2 { |
| 601 | my $self = shift; |
| 602 | local $_ = $self->parse (@_); |
| 603 | s/\s+$//; |
| 604 | $self->output (switchquotes ('.Sh', $self->mapfonts ($_))); |
| 605 | $self->outindex ('Subsection', $_); |
| 606 | $$self{NEEDSPACE} = 0; |
| 607 | } |
| 608 | |
| 609 | # Start a list. For indents after the first, wrap the outside indent in .RS |
| 610 | # so that hanging paragraph tags will be correct. |
| 611 | sub cmd_over { |
| 612 | my $self = shift; |
| 613 | local $_ = shift; |
| 614 | unless (/^[-+]?\d+\s+$/) { $_ = $$self{indent} } |
| 615 | if (@{ $$self{INDENTS} } > 0) { |
| 616 | $self->output (".RS $$self{INDENT}\n"); |
| 617 | } |
| 618 | push (@{ $$self{INDENTS} }, $$self{INDENT}); |
| 619 | $$self{INDENT} = ($_ + 0); |
| 620 | } |
| 621 | |
| 622 | # End a list. If we've closed an embedded indent, we've mangled the hanging |
| 623 | # paragraph indent, so temporarily replace it with .RS and set WEIRDINDENT. |
| 624 | # We'll close that .RS at the next =back or =item. |
| 625 | sub cmd_back { |
| 626 | my $self = shift; |
| 627 | $$self{INDENT} = pop @{ $$self{INDENTS} }; |
| 628 | unless (defined $$self{INDENT}) { |
| 629 | carp "Unmatched =back"; |
| 630 | $$self{INDENT} = 0; |
| 631 | } |
| 632 | if ($$self{WEIRDINDENT}) { |
| 633 | $self->output (".RE\n"); |
| 634 | $$self{WEIRDINDENT} = 0; |
| 635 | } |
| 636 | if (@{ $$self{INDENTS} } > 0) { |
| 637 | $self->output (".RE\n"); |
| 638 | $self->output (".RS $$self{INDENT}\n"); |
| 639 | $$self{WEIRDINDENT} = 1; |
| 640 | } |
| 641 | $$self{NEEDSPACE} = 1; |
| 642 | } |
| 643 | |
| 644 | # An individual list item. Emit an index entry for anything that's |
| 645 | # interesting, but don't emit index entries for things like bullets and |
| 646 | # numbers. rofficate bullets too while we're at it (so for nice output, use |
| 647 | # * for your lists rather than o or . or - or some other thing). |
| 648 | sub cmd_item { |
| 649 | my $self = shift; |
| 650 | local $_ = $self->parse (@_); |
| 651 | s/\s+$//; |
| 652 | my $index; |
| 653 | if (/\w/ && !/^\w[.\)]\s*$/) { |
| 654 | $index = $_; |
| 655 | $index =~ s/^\s*[-*+o.]?\s*//; |
| 656 | } |
| 657 | s/^\*(\s|\Z)/\\\(bu$1/; |
| 658 | if ($$self{WEIRDINDENT}) { |
| 659 | $self->output (".RE\n"); |
| 660 | $$self{WEIRDINDENT} = 0; |
| 661 | } |
| 662 | $_ = $self->mapfonts ($_); |
| 663 | $self->output (switchquotes ('.Ip', $_, $$self{INDENT})); |
| 664 | $self->outindex ($index ? ('Item', $index) : ()); |
| 665 | $$self{NEEDSPACE} = 0; |
| 666 | } |
| 667 | |
| 668 | # Begin a block for a particular translator. Setting VERBATIM triggers |
| 669 | # special handling in textblock(). |
| 670 | sub cmd_begin { |
| 671 | my $self = shift; |
| 672 | local $_ = shift; |
| 673 | my ($kind) = /^(\S+)/ or return; |
| 674 | if ($kind eq 'man' || $kind eq 'roff') { |
| 675 | $$self{VERBATIM} = 1; |
| 676 | } else { |
| 677 | $$self{EXCLUDE} = 1; |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | # End a block for a particular translator. We assume that all =begin/=end |
| 682 | # pairs are properly closed. |
| 683 | sub cmd_end { |
| 684 | my $self = shift; |
| 685 | $$self{EXCLUDE} = 0; |
| 686 | $$self{VERBATIM} = 0; |
| 687 | } |
| 688 | |
| 689 | # One paragraph for a particular translator. Ignore it unless it's intended |
| 690 | # for man or roff, in which case we output it verbatim. |
| 691 | sub cmd_for { |
| 692 | my $self = shift; |
| 693 | local $_ = shift; |
| 694 | my $line = shift; |
| 695 | return unless s/^(?:man|roff)\b[ \t]*\n?//; |
| 696 | $self->output ($_); |
| 697 | } |
| 698 | |
| 699 | |
| 700 | ############################################################################ |
| 701 | # Link handling |
| 702 | ############################################################################ |
| 703 | |
| 704 | # Handle links. We can't actually make real hyperlinks, so this is all to |
| 705 | # figure out what text and formatting we print out. |
| 706 | sub buildlink { |
| 707 | my $self = shift; |
| 708 | local $_ = shift; |
| 709 | |
| 710 | # Smash whitespace in case we were split across multiple lines. |
| 711 | s/\s+/ /g; |
| 712 | |
| 713 | # If we were given any explicit text, just output it. |
| 714 | if (m{ ^ ([^|]+) \| }x) { return $1 } |
| 715 | |
| 716 | # Okay, leading and trailing whitespace isn't important. |
| 717 | s/^\s+//; |
| 718 | s/\s+$//; |
| 719 | |
| 720 | # Default to using the whole content of the link entry as a section |
| 721 | # name. Note that L<manpage/> forces a manpage interpretation, as does |
| 722 | # something looking like L<manpage(section)>. Do the same thing to |
| 723 | # L<manpage(section)> as we would to manpage(section) without the L<>; |
| 724 | # see guesswork(). If we've added italics, don't add the "manpage" |
| 725 | # text; markup is sufficient. |
| 726 | my ($manpage, $section) = ('', $_); |
| 727 | if (/^"\s*(.*?)\s*"$/) { |
| 728 | $section = '"' . $1 . '"'; |
| 729 | } elsif (m{ ^ [-:.\w]+ (?: \( \S+ \) )? $ }x) { |
| 730 | ($manpage, $section) = ($_, ''); |
| 731 | $manpage =~ s/^([^\(]+)\(/'\f(IS' . $1 . '\f(IE\|('/e; |
| 732 | } elsif (m%/%) { |
| 733 | ($manpage, $section) = split (/\s*\/\s*/, $_, 2); |
| 734 | if ($manpage =~ /^[-:.\w]+(?:\(\S+\))?$/) { |
| 735 | $manpage =~ s/^([^\(]+)\(/'\f(IS' . $1 . '\f(IE\|'/e; |
| 736 | } |
| 737 | $section =~ s/^\"\s*//; |
| 738 | $section =~ s/\s*\"$//; |
| 739 | } |
| 740 | if ($manpage && $manpage !~ /\\f\(IS/) { |
| 741 | $manpage = "the $manpage manpage"; |
| 742 | } |
| 743 | |
| 744 | # Now build the actual output text. |
| 745 | my $text = ''; |
| 746 | if (!length ($section) && !length ($manpage)) { |
| 747 | carp "Invalid link $_"; |
| 748 | } elsif (!length ($section)) { |
| 749 | $text = $manpage; |
| 750 | } elsif ($section =~ /^[:\w]+(?:\(\))?/) { |
| 751 | $text .= 'the ' . $section . ' entry'; |
| 752 | $text .= (length $manpage) ? " in $manpage" |
| 753 | : " elsewhere in this document"; |
| 754 | } else { |
| 2e20e14f |
755 | if ($section !~ /^".*"$/) { $section = '"' . $section . '"' } |
| 756 | $text .= 'the section on ' . $section; |
| 9741dab0 |
757 | $text .= " in $manpage" if length $manpage; |
| 758 | } |
| 759 | $text; |
| 760 | } |
| 761 | |
| 762 | |
| 763 | ############################################################################ |
| 764 | # Escaping and fontification |
| 765 | ############################################################################ |
| 766 | |
| 767 | # At this point, we'll have embedded font codes of the form \f(<font>[SE] |
| 768 | # where <font> is one of B, I, or F. Turn those into the right font start |
| 769 | # or end codes. B<someI<thing> else> should map to \fBsome\f(BIthing\fB |
| 770 | # else\fR. The old pod2man didn't get this right; the second \fB was \fR, |
| 771 | # so nested sequences didn't work right. We take care of this by using |
| 772 | # variables as a combined pointer to our current font sequence, and set each |
| 773 | # to the number of current nestings of start tags for that font. Use them |
| 774 | # as a vector to look up what font sequence to use. |
| 775 | sub mapfonts { |
| 776 | my $self = shift; |
| 777 | local $_ = shift; |
| 778 | |
| 779 | my ($fixed, $bold, $italic) = (0, 0, 0); |
| 780 | my %magic = (F => \$fixed, B => \$bold, I => \$italic); |
| 781 | s { \\f\((.)(.) } { |
| 782 | ${ $magic{$1} } += ($2 eq 'S') ? 1 : -1; |
| 783 | $$self{FONTS}{($fixed && 1) . ($bold && 1) . ($italic && 1)}; |
| 784 | }gxe; |
| 785 | $_; |
| 786 | } |
| 787 | |
| 788 | |
| 789 | ############################################################################ |
| 790 | # *roff-specific parsing |
| 791 | ############################################################################ |
| 792 | |
| 793 | # Called instead of parse_text, calls parse_text with the right flags. |
| 794 | sub parse { |
| 795 | my $self = shift; |
| 796 | $self->parse_text ({ -expand_seq => 'sequence', |
| 797 | -expand_ptree => 'collapse' }, @_); |
| 798 | } |
| 799 | |
| 800 | # Takes a parse tree and a flag saying whether or not to treat it as literal |
| 801 | # text (not call guesswork on it), and returns the concatenation of all of |
| 802 | # the text strings in that parse tree. If the literal flag isn't true, |
| 803 | # guesswork() will be called on all plain scalars in the parse tree. |
| 804 | # Assumes that everything in the parse tree is either a scalar or a |
| 805 | # reference to a scalar. |
| 806 | sub collapse { |
| 807 | my ($self, $ptree, $literal) = @_; |
| 808 | if ($literal) { |
| 809 | return join ('', map { |
| 810 | if (ref $_) { |
| 811 | $$_; |
| 812 | } else { |
| 813 | s/\\/\\e/g; |
| 814 | $_; |
| 815 | } |
| 816 | } $ptree->children); |
| 817 | } else { |
| 818 | return join ('', map { |
| 819 | ref ($_) ? $$_ : $self->guesswork ($_) |
| 820 | } $ptree->children); |
| 821 | } |
| 822 | } |
| 823 | |
| 824 | # Takes a text block to perform guesswork on; this is guaranteed not to |
| 825 | # contain any interior sequences. Returns the text block with remapping |
| 826 | # done. |
| 827 | sub guesswork { |
| 828 | my $self = shift; |
| 829 | local $_ = shift; |
| 830 | |
| 831 | # rofficate backslashes. |
| 832 | s/\\/\\e/g; |
| 833 | |
| 834 | # Ensure double underbars have a tiny space between them. |
| 835 | s/__/_\\|_/g; |
| 836 | |
| 837 | # Make all caps a little smaller. Be careful here, since we don't want |
| 838 | # to make @ARGV into small caps, nor do we want to fix the MIME in |
| 839 | # MIME-Version, since it looks weird with the full-height V. |
| 840 | s{ |
| 841 | ( ^ | [\s\(\"\'\`\[\{<>] ) |
| 842 | ( [A-Z] [A-Z] [/A-Z+:\d_\$&-]* ) |
| 843 | (?: (?= [\s>\}\]\)\'\".?!,;:] | -- ) | $ ) |
| 844 | } { $1 . '\s-1' . $2 . '\s0' . $3 }egx; |
| 845 | |
| 846 | # Turn PI into a pretty pi. |
| 847 | s{ (?: \\s-1 | \b ) PI (?: \\s0 | \b ) } {\\*\(PI}gx; |
| 848 | |
| 849 | # Italize functions in the form func(). |
| 850 | s{ |
| 851 | \b |
| 852 | ( |
| 853 | [:\w]+ (?:\\s-1)? \(\) |
| 854 | ) |
| 855 | } { '\f(IS' . $1 . '\f(IE' }egx; |
| 856 | |
| 857 | # func(n) is a reference to a manual page. Make it \fIfunc\fR\|(n). |
| 858 | s{ |
| 859 | \b |
| 860 | (\w[-:.\w]+ (?:\\s-1)?) |
| 861 | ( |
| 862 | \( [^\)] \) |
| 863 | ) |
| 864 | } { '\f(IS' . $1 . '\f(IE\|' . $2 }egx; |
| 865 | |
| 866 | # Convert simple Perl variable references to a fixed-width font. |
| 867 | s{ |
| 868 | ( \s+ ) |
| 869 | ( [\$\@%] [\w:]+ ) |
| 870 | (?! \( ) |
| 871 | } { $1 . '\f(FS' . $2 . '\f(FE'}egx; |
| 872 | |
| 873 | # Translate -- into a real em dash if it's used like one and fix up |
| 874 | # dashes, but keep hyphens hyphens. |
| 875 | s{ (\G|^|.) (-+) (\b|.) } { |
| 876 | my ($pre, $dash, $post) = ($1, $2, $3); |
| 877 | if (length ($dash) == 1) { |
| 878 | ($pre =~ /[a-zA-Z]/) ? "$pre-$post" : "$pre\\-$post"; |
| 879 | } elsif (length ($dash) == 2 |
| 880 | && ((!$pre && !$post) |
| 881 | || ($pre =~ /\w/ && !$post) |
| 882 | || ($pre eq ' ' && $post eq ' ') |
| 883 | || ($pre eq '=' && $post ne '=') |
| 884 | || ($pre ne '=' && $post eq '='))) { |
| 885 | "$pre\\*(--$post"; |
| 886 | } else { |
| 887 | $pre . ('\-' x length $dash) . $post; |
| 888 | } |
| 889 | }egxs; |
| 890 | |
| 891 | # Fix up double quotes. |
| 892 | s{ \" ([^\"]+) \" } { '\*(L"' . $1 . '\*(R"' }egx; |
| 893 | |
| 894 | # Make C++ into \*(C+, which is a squinched version. |
| 895 | s{ \b C\+\+ } {\\*\(C+}gx; |
| 896 | |
| 897 | # All done. |
| 898 | $_; |
| 899 | } |
| 900 | |
| 901 | |
| 902 | ############################################################################ |
| 903 | # Output formatting |
| 904 | ############################################################################ |
| 905 | |
| 906 | # Make vertical whitespace. |
| 907 | sub makespace { |
| 908 | my $self = shift; |
| 909 | $self->output ($$self{INDENT} > 0 ? ".Sp\n" : ".PP\n"); |
| 910 | } |
| 911 | |
| 912 | # Output any pending index entries, and optionally an index entry given as |
| 913 | # an argument. Support multiple index entries in X<> separated by slashes, |
| 914 | # and strip special escapes from index entries. |
| 915 | sub outindex { |
| 916 | my ($self, $section, $index) = @_; |
| 917 | my @entries = map { split m%\s*/\s*% } @{ $$self{INDEX} }; |
| 918 | return unless ($section || @entries); |
| 919 | $$self{INDEX} = []; |
| 920 | my $output; |
| 921 | if (@entries) { |
| 922 | my $output = '.IX Xref "' |
| 923 | . join (' ', map { s/\"/\"\"/; $_ } @entries) |
| 924 | . '"' . "\n"; |
| 925 | } |
| 926 | if ($section) { |
| 927 | $index =~ s/\"/\"\"/; |
| 928 | $index =~ s/\\-/-/g; |
| 929 | $index =~ s/\\(?:s-?\d|.\(..|.)//g; |
| 930 | $output .= ".IX $section " . '"' . $index . '"' . "\n"; |
| 931 | } |
| 932 | $self->output ($output); |
| 933 | } |
| 934 | |
| 935 | # Output text to the output device. |
| 936 | sub output { print { $_[0]->output_handle } $_[1] } |
| 937 | |
| 938 | __END__ |
| 939 | |
| 940 | .\" These are some extra bits of roff that I don't want to lose track of |
| 941 | .\" but that have been removed from the preamble to make it a bit shorter |
| 942 | .\" since they're not currently being used. They're accents and special |
| 943 | .\" characters we don't currently have escapes for. |
| 944 | .if n \{\ |
| 945 | . ds ? ? |
| 946 | . ds ! ! |
| 947 | . ds q |
| 948 | .\} |
| 949 | .if t \{\ |
| 950 | . ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10' |
| 951 | . ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m' |
| 952 | . ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10' |
| 953 | .\} |
| 954 | .ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#] |
| 955 | .ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u' |
| 956 | .ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u' |
| 957 | .ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#] |
| 958 | .ds oe o\h'-(\w'o'u*4/10)'e |
| 959 | .ds Oe O\h'-(\w'O'u*4/10)'E |
| 960 | .if \n(.H>23 .if \n(.V>19 \ |
| 961 | \{\ |
| 962 | . ds v \h'-1'\o'\(aa\(ga' |
| 963 | . ds _ \h'-1'^ |
| 964 | . ds . \h'-1'. |
| 965 | . ds 3 3 |
| 966 | . ds oe oe |
| 967 | . ds Oe OE |
| 968 | .\} |
| 969 | |
| 970 | ############################################################################ |
| 971 | # Documentation |
| 972 | ############################################################################ |
| 973 | |
| 974 | =head1 NAME |
| 975 | |
| 976 | Pod::Man - Convert POD data to formatted *roff input |
| 977 | |
| 978 | =head1 SYNOPSIS |
| 979 | |
| 980 | use Pod::Man; |
| 981 | my $parser = Pod::Man->new (release => $VERSION, section => 8); |
| 982 | |
| 983 | # Read POD from STDIN and write to STDOUT. |
| 984 | $parser->parse_from_filehandle; |
| 985 | |
| 986 | # Read POD from file.pod and write to file.1. |
| 987 | $parser->parse_from_file ('file.pod', 'file.1'); |
| 988 | |
| 989 | =head1 DESCRIPTION |
| 990 | |
| 991 | Pod::Man is a module to convert documentation in the POD format (the |
| 992 | preferred language for documenting Perl) into *roff input using the man |
| 993 | macro set. The resulting *roff code is suitable for display on a terminal |
| 994 | using nroff(1), normally via man(1), or printing using troff(1). It is |
| 9e107c59 |
995 | conventionally invoked using the driver script B<pod2man>, but it can also |
| 9741dab0 |
996 | be used directly. |
| 997 | |
| 998 | As a derived class from Pod::Parser, Pod::Man supports the same methods and |
| 999 | interfaces. See L<Pod::Parser> for all the details; briefly, one creates a |
| 1000 | new parser with C<Pod::Man-E<gt>new()> and then calls either |
| 1001 | parse_from_filehandle() or parse_from_file(). |
| 1002 | |
| 1003 | new() can take options, in the form of key/value pairs that control the |
| 1004 | behavior of the parser. See below for details. |
| 1005 | |
| 1006 | If no options are given, Pod::Man uses the name of the input file with any |
| 1007 | trailing C<.pod>, C<.pm>, or C<.pl> stripped as the man page title, to |
| 1008 | section 1 unless the file ended in C<.pm> in which case it defaults to |
| 1009 | section 3, to a centered title of "User Contributed Perl Documentation", to |
| 1010 | a centered footer of the Perl version it is run with, and to a left-hand |
| 1011 | footer of the modification date of its input (or the current date if given |
| 1012 | STDIN for input). |
| 1013 | |
| 1014 | Pod::Man assumes that your *roff formatters have a fixed-width font named |
| 1015 | CW. If yours is called something else (like CR), use the C<fixed> option to |
| 1016 | specify it. This generally only matters for troff output for printing. |
| 1017 | Similarly, you can set the fonts used for bold, italic, and bold italic |
| 1018 | fixed-width output. |
| 1019 | |
| 1020 | Besides the obvious pod conversions, Pod::Man also takes care of formatting |
| 1021 | func(), func(n), and simple variable references like $foo or @bar so you |
| 1022 | don't have to use code escapes for them; complex expressions like |
| 1023 | C<$fred{'stuff'}> will still need to be escaped, though. It also translates |
| 1024 | dashes that aren't used as hyphens into en dashes, makes long dashes--like |
| 1025 | this--into proper em dashes, fixes "paired quotes," makes C++ and PI look |
| 1026 | right, puts a little space between double underbars, makes ALLCAPS a teeny |
| 1027 | bit smaller in troff(1), and escapes stuff that *roff treats as special so |
| 1028 | that you don't have to. |
| 1029 | |
| 1030 | The recognized options to new() are as follows. All options take a single |
| 1031 | argument. |
| 1032 | |
| 1033 | =over 4 |
| 1034 | |
| 1035 | =item center |
| 1036 | |
| 1037 | Sets the centered page header to use instead of "User Contributed Perl |
| 1038 | Documentation". |
| 1039 | |
| 1040 | =item date |
| 1041 | |
| 1042 | Sets the left-hand footer. By default, the modification date of the input |
| 1043 | file will be used, or the current date if stat() can't find that file (the |
| 1044 | case if the input is from STDIN), and the date will be formatted as |
| 1045 | YYYY-MM-DD. |
| 1046 | |
| 1047 | =item fixed |
| 1048 | |
| 1049 | The fixed-width font to use for vertabim text and code. Defaults to CW. |
| 1050 | Some systems may want CR instead. Only matters for troff(1) output. |
| 1051 | |
| 1052 | =item fixedbold |
| 1053 | |
| 1054 | Bold version of the fixed-width font. Defaults to CB. Only matters for |
| 1055 | troff(1) output. |
| 1056 | |
| 1057 | =item fixeditalic |
| 1058 | |
| 1059 | Italic version of the fixed-width font (actually, something of a misnomer, |
| 1060 | since most fixed-width fonts only have an oblique version, not an italic |
| 1061 | version). Defaults to CI. Only matters for troff(1) output. |
| 1062 | |
| 1063 | =item fixedbolditalic |
| 1064 | |
| 1065 | Bold italic (probably actually oblique) version of the fixed-width font. |
| 1066 | Pod::Man doesn't assume you have this, and defaults to CB. Some systems |
| 1067 | (such as Solaris) have this font available as CX. Only matters for troff(1) |
| 1068 | output. |
| 1069 | |
| 1070 | =item release |
| 1071 | |
| 1072 | Set the centered footer. By default, this is the version of Perl you run |
| 1073 | Pod::Man under. Note that some system an macro sets assume that the |
| 1074 | centered footer will be a modification date and will prepend something like |
| 1075 | "Last modified: "; if this is the case, you may want to set C<release> to |
| 1076 | the last modified date and C<date> to the version number. |
| 1077 | |
| 1078 | =item section |
| 1079 | |
| 1080 | Set the section for the C<.TH> macro. The standard section numbering |
| 1081 | convention is to use 1 for user commands, 2 for system calls, 3 for |
| 1082 | functions, 4 for devices, 5 for file formats, 6 for games, 7 for |
| 1083 | miscellaneous information, and 8 for administrator commands. There is a lot |
| 1084 | of variation here, however; some systems (like Solaris) use 4 for file |
| 1085 | formats, 5 for miscellaneous information, and 7 for devices. Still others |
| 1086 | use 1m instead of 8, or some mix of both. About the only section numbers |
| 1087 | that are reliably consistent are 1, 2, and 3. |
| 1088 | |
| 1089 | By default, section 1 will be used unless the file ends in .pm in which case |
| 1090 | section 3 will be selected. |
| 1091 | |
| 1092 | =back |
| 1093 | |
| 1094 | The standard Pod::Parser method parse_from_filehandle() takes up to two |
| 1095 | arguments, the first being the file handle to read POD from and the second |
| 1096 | being the file handle to write the formatted output to. The first defaults |
| 1097 | to STDIN if not given, and the second defaults to STDOUT. The method |
| 1098 | parse_from_file() is almost identical, except that its two arguments are the |
| 1099 | input and output disk files instead. See L<Pod::Parser> for the specific |
| 1100 | details. |
| 1101 | |
| 1102 | =head1 DIAGNOSTICS |
| 1103 | |
| 1104 | =over 4 |
| 1105 | |
| 1106 | =item roff font should be 1 or 2 chars, not `%s' |
| 1107 | |
| 1108 | (F) You specified a *roff font (using C<fixed>, C<fixedbold>, etc.) that |
| 1109 | wasn't either one or two characters. Pod::Man doesn't support *roff fonts |
| 1110 | longer than two characters, although some *roff extensions do (the canonical |
| 1111 | versions of nroff(1) and troff(1) don't either). |
| 1112 | |
| 1113 | =item Invalid link %s |
| 1114 | |
| 1115 | (W) The POD source contained a C<LE<lt>E<gt>> sequence that Pod::Man was |
| 1116 | unable to parse. You should never see this error message; it probably |
| 1117 | indicates a bug in Pod::Man. |
| 1118 | |
| 1119 | =item Unknown escape EE<lt>%sE<gt> |
| 1120 | |
| 1121 | (W) The POD source contained an C<EE<lt>E<gt>> escape that Pod::Man didn't |
| 1122 | know about. C<EE<lt>%sE<gt>> was printed verbatim in the output. |
| 1123 | |
| 1124 | =item Unknown sequence %s |
| 1125 | |
| 1126 | (W) The POD source contained a non-standard interior sequence (something of |
| 1127 | the form C<XE<lt>E<gt>>) that Pod::Man didn't know about. It was ignored. |
| 1128 | |
| 1129 | =item Unmatched =back |
| 1130 | |
| 1131 | (W) Pod::Man encountered a C<=back> command that didn't correspond to an |
| 1132 | C<=over> command. |
| 1133 | |
| 1134 | =back |
| 1135 | |
| 1136 | =head1 BUGS |
| 1137 | |
| 1138 | The lint-like features and strict POD format checking done by B<pod2man> are |
| 1139 | not yet implemented and should be, along with the corresponding C<lax> |
| 1140 | option. |
| 1141 | |
| 1142 | The NAME section should be recognized specially and index entries emitted |
| 1143 | for everything in that section. This would have to be deferred until the |
| 1144 | next section, since extraneous things in NAME tends to confuse various man |
| 1145 | page processors. |
| 1146 | |
| 1147 | The handling of hyphens, en dashes, and em dashes is somewhat fragile, and |
| 1148 | one may get the wrong one under some circumstances. This should only matter |
| 1149 | for troff(1) output. |
| 1150 | |
| 1151 | When and whether to use small caps is somewhat tricky, and Pod::Man doesn't |
| 1152 | necessarily get it right. |
| 1153 | |
| 1154 | Pod::Man doesn't handle font names longer than two characters. Neither do |
| 1155 | most troff(1) implementations, but GNU troff does as an extension. It would |
| 1156 | be nice to support as an option for those who want to use it. |
| 1157 | |
| 1158 | The preamble added to each output file is rather verbose, and most of it is |
| 1159 | only necessary in the presence of EE<lt>E<gt> escapes for non-ASCII |
| 1160 | characters. It would ideally be nice if all of those definitions were only |
| 1161 | output if needed, perhaps on the fly as the characters are used. |
| 1162 | |
| 1163 | Some of the automagic applied to file names assumes Unix directory |
| 1164 | separators. |
| 1165 | |
| 1166 | Pod::Man is excessively slow. |
| 1167 | |
| 1168 | =head1 NOTES |
| 1169 | |
| 1170 | The intention is for this module and its driver script to eventually replace |
| 1171 | B<pod2man> in Perl core. |
| 1172 | |
| 1173 | =head1 SEE ALSO |
| 1174 | |
| 9e107c59 |
1175 | L<Pod::Parser|Pod::Parser>, perlpod(1), pod2man(1), nroff(1), troff(1), |
| 9741dab0 |
1176 | man(1), man(7) |
| 1177 | |
| 1178 | Ossanna, Joseph F., and Brian W. Kernighan. "Troff User's Manual," |
| 1179 | Computing Science Technical Report No. 54, AT&T Bell Laboratories. This is |
| 1180 | the best documentation of standard nroff(1) and troff(1). At the time of |
| 1181 | this writing, it's available at http://www.cs.bell-labs.com/cm/cs/cstr.html. |
| 1182 | |
| 1183 | The man page documenting the man macro set may be man(5) instead of man(7) |
| 9e107c59 |
1184 | on your system. Also, please see pod2man(1) for extensive documentation on |
| 9741dab0 |
1185 | writing manual pages if you've not done it before and aren't familiar with |
| 1186 | the conventions. |
| 1187 | |
| 1188 | =head1 AUTHOR |
| 1189 | |
| 1190 | Russ Allbery E<lt>rra@stanford.eduE<gt>, based I<very> heavily on the |
| 1191 | original B<pod2man> by Tom Christiansen E<lt>tchrist@mox.perl.comE<gt>. |
| 1192 | |
| 1193 | =cut |
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