This file is indexed.

/usr/share/perl5/sgmlspl-specs/docbook2man-spec.pl is in docbook-utils 0.6.14-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
=head1 NAME

docbook2man-spec - convert DocBook RefEntries to Unix manpages

=head1 SYNOPSIS

The SGMLSpm package from CPAN.  This contains the sgmlspl script which
is used to grok this file.  Use it like this:

nsgmls some-docbook-document.sgml | sgmlspl docbook2man-spec.pl

=head1 DESCRIPTION

This is a sgmlspl spec file that produces Unix-style
manpages from RefEntry markup.

See the accompanying RefEntry man page for 'plain new' documentation. :)

=head1 LIMITATIONS

Trying docbook2man on non-DocBook or non-conformant SGML results in
undefined behavior. :-)

This program is a slow, dodgy Perl script.

This program does not come close to supporting all the possible markup
in DocBook, and will produce wrong output in some cases with supported
markup.

=head1 TODO

Add new element handling and fix existing handling.  Be robust.
Produce cleanest, readable man output as possible (unlike some
other converters).  Follow Linux man(7) convention.
If this results in added logic in this script,
that's okay.  The code should still be reasonably organized.

Make it faster.  If Perl sucks port it to another language.

=head1 COPYRIGHT

Copyright (C) 1998-1999 Steve Cheng <steve@ggi-project.org>

This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

You should have received a copy of the GNU General Public License along with
this program; see the file COPYING.  If not, please write to the Free
Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

=cut

# $Id: docbook2man-spec.pl,v 1.10 2003/06/10 08:30:30 twaugh Exp $

use SGMLS;			# Use the SGMLS package.
use SGMLS::Output;		# Use stack-based output.
use SGMLS::Refs;

########################################################################
# SGMLSPL script produced automatically by the script sgmlspl.pl
#
# Document Type: any, but processes only RefEntries
# Edited by: me :)
########################################################################

$write_manpages = 0;
$blank_xrefs = 0;

sgml('start', sub { 
	push_output('nul');
	$raw_cdata = 1;			# Makes it a bit faster.
	
	# Links file
	open(LINKSFILE, ">manpage.links");

	$Refs = new SGMLS::Refs("manpage.refs");
});
sgml('end', sub {
	close(LINKSFILE);
	if($blank_xrefs) {
		print STDERR "Warning: output contains unresolved XRefs\n";
	}
});




########################################################################
#
# Output helpers 
#
########################################################################

# Our own version of sgml() and output() to allow simple string output
# to play well with roff's stupid whitespace rules. 

sub man_sgml
{
	if(ref($_[1]) eq 'CODE') {
		return &sgml;
	}
	
	my $s = $_[1];

	$s =~ s/\\/\\\\/g;
	$s =~ s/'/\\'/g;

	# \n at the beginning means start at beginning of line
	if($s =~ s/^\n//) {
		$sub = 'sub { output "\n" unless $newline_last++; ';
		if($s eq '') { 
			sgml($_[0], eval('sub { output "\n" unless $newline_last++; }'));
		} elsif($s =~ /\n$/) {
			sgml($_[0], eval("sub { output \"\\n\" unless \$newline_last++; output '$s'; }"));
		} else {
			sgml($_[0], eval("sub { output \"\\n\" unless \$newline_last; output '$s'; \$newline_last = 0; }"));
		}
	} else {
		if($s =~ /\n$/) {
			sgml($_[0], eval("sub { output '$s'; \$newline_last = 1; }"));
		} else {
			sgml($_[0], eval("sub { output '$s'; \$newline_last = 0; }"));
		}
	}
}

sub man_output
{
	$_ = shift;
	if(s/^\n//) {
		output "\n" unless $newline_last++;
	}
	return if $_ eq '';
	
	output $_;

	if(@_) {
		output @_;
		$newline_last = (pop(@_) =~ /\n$/);
	} else {
		$newline_last = ($_ =~ /\n$/)
	}
}

# Fold lines into one, quote some characters
sub fold_string
{
	$_ = shift;
	
	s/\\/\\\\/g;
	s/"/\\\&"/g;

	# Change tabs to spaces
	tr/\t\n/  /;

	# Trim whitespace from beginning and end.
	s/^ +//;
	s/ +$//;

	return $_;
}
	
sub save_cdata()
{
	$raw_cdata++;
	push_output('string');
}

sub bold_on()
{
	# If the last font is also bold, don't change anything.
	# Basically this is to just get more readable man output.
	if($fontstack[$#fontstack] ne 'bold') {
		if(!$raw_cdata) {
			output '\fB';
			$newline_last = 0;
		}
	}
	push(@fontstack, 'bold');
}

sub italic_on()
{
	# If the last font is also italic, don't change anything.
	if($fontstack[$#fontstack] ne 'italic') {
		if(!$raw_cdata) {
			output '\fI';
			$newline_last = 0;
		}
	}
	push(@fontstack, 'italic');
}

sub font_off()
{
	my $thisfont = pop(@fontstack);
	my $lastfont = $fontstack[$#fontstack];
	
	# Only output font change if it is different
	if($thisfont ne $lastfont) {
		if($raw_cdata)			{ return; }
		elsif($lastfont eq 'bold') 	{ output '\fB'; }
		elsif($lastfont eq 'italic')	{ output '\fI'; }
		else				{ output '\fR'; }
	
		$newline_last = 0;
	}
}






########################################################################
#
# Manpage management
#
########################################################################

sgml('<REFENTRY>', sub { 
	# This will be overwritten at end of REFMETA, when we know the name of the page.
	pop_output();
	
	$write_manpages = 1;		# Currently writing manpage.
	
	$nocollapse_whitespace = 0;	# Current whitespace collapse counter.
	$newline_last = 1;		# At beginning of line?
		# Just a bit of warning, you will see this variable manipulated
		# manually a lot.  It makes the code harder to follow but it
		# saves you from having to worry about collapsing at the end of
		# parse, stopping at verbatims, etc.
	$raw_cdata = 0;                 # Instructs certain output functions to
					# leave CDATA alone, so we can assign
					# it to a string and process it, etc.
	@fontstack = ();		# Fonts being activated.
	
	$manpage_title = '';		# Needed for indexing.
	$manpage_sect = '';
	@manpage_names = ();
	
	$manpage_misc = '';
	
	$list_nestlevel = 0;		# Indent certain nested content.

	# check refentry's language
	if(defined($_[0]->attribute('LANG')->value)) {
	  $manpage_lang = $_[0]->attribute('LANG')->value;
	}
	else {
	  $manpage_lang = '';
	}
});
sgml('</REFENTRY>', sub {
	if(!$newline_last) {
		output "\n";
	}
	
	$write_manpages = 0;
	$raw_cdata = 1;
	push_output('nul');
});

sgml('</REFMETA>', sub {
	if ($manpage_lang) {
		push_output('file', "$manpage_title.$manpage_lang.$manpage_sect");
	} else {
		push_output('file', "$manpage_title.$manpage_sect");
	}

	output <<_END_BANNER;
.\\" This manpage has been automatically generated by docbook2man 
.\\" from a DocBook document.  This tool can be found at:
.\\" <http://shell.ipoline.com/~elmert/comp/docbook2X/> 
.\\" Please send any bug reports, improvements, comments, patches, 
.\\" etc. to Steve Cheng <steve\@ggi-project.org>.
_END_BANNER

	my $date = `date "+%d %B %Y"`;
	my $manpage_date = $manpage_date || $date ;

	output '.TH "';
	
	# If the title is not mixed-case, convention says to
	# uppercase the whole title.  (The canonical title is
	# lowercase.)
	if($manpage_title =~ /[A-Z]/) {
		output fold_string($manpage_title);
	} else {
		output uc(fold_string($manpage_title));
	}
	
	output  '" "', fold_string($manpage_sect), 
		'" "', fold_string($manpage_date), 
		'" "', $manpage_misc, 
		'" "', $manpage_manual, 
		"\"\n";

	$newline_last = 1;

	# References to this RefEntry.
	my $id = $_[0]->parent->attribute('ID')->value;
	if($id ne '') {
		# The 'package name' part of the section should
		# not be used when citing it.
		my ($sectnum) = ($manpage_sect =~ /([0-9]*)/);
		
		if($_[0]->parent->attribute('XREFLABEL')->value eq '') {
			$Refs->put("refentry:$id", "$manpage_title($sectnum)");
		} else {
			$Refs->put("refentry:$id",
				$_[0]->parent->attribute('XREFLABEL')->value . 
				"($sectnum)");
		}
	}
});

sgml('<REFENTRYTITLE>', sub { 
	if($_[0]->in('REFMETA')) { 
		save_cdata();
	} else { 
		# Manpage citations are in bold.
		bold_on();
	}
});
sgml('</REFENTRYTITLE>', sub { 
	if($_[0]->in('REFMETA')) {
		$raw_cdata--;
		$manpage_title = pop_output();
	}
	else { font_off(); }
});

sgml('<MANVOLNUM>', sub { 
	if($_[0]->in('REFMETA')) { 
		save_cdata();	
	} else {
		# Manpage citations use ().
		output '(';
	}
});
sgml('</MANVOLNUM>', sub { 
	if($_[0]->in('REFMETA')) {
		$raw_cdata--;
		$manpage_sect = pop_output();
	}
	else { output ')' }
});

sgml('<REFMISCINFO>', \&save_cdata);
sgml('</REFMISCINFO>', sub { 
	$raw_cdata--;
	$manpage_misc = fold_string(pop_output());
});


# NAME section
man_sgml('<REFNAMEDIV>', sub {
	my %words = qw( fr NOM es NOMBRE de NAME );
	# Use the REFNAMEDIV's lang attribute, and default to the
	# REFENTRY's lang attribute.
	my $lang = $_[0]->attribute('LANG')->value;
	$lang = $manpage_lang unless defined $lang;
	if (defined($lang) and defined $words{lc($lang)}) {
		my $ad = $words{lc($lang)};
		output("\n.SH $ad\n");}
	else {	output("\n.SH NAME\n");}
});

sgml('<REFNAME>', \&save_cdata);
sgml('</REFNAME>', sub { 
	$raw_cdata--;
	push(@manpage_names, pop_output());
});

sgml('<REFPURPOSE>', \&save_cdata);
sgml('</REFPURPOSE>', sub { 
	$raw_cdata--;
	my $manpage_purpose = fold_string(pop_output());
	
	for(my $i = 0; $i < $#manpage_names; $i++) {
		output fold_string($manpage_names[$i]), ', ';
	}

	output fold_string($manpage_names[$#manpage_names]);
	output " \\- $manpage_purpose\n";

	$newline_last = 1;

	foreach(@manpage_names) {
		# Don't link to itself
		if($_ ne $manpage_title) {
			print LINKSFILE "$manpage_title.$manpage_sect	$_.$manpage_sect\n";
		}
	}
});
	
man_sgml('<REFCLASS>', "\n.sp\n");

#RefDescriptor





########################################################################
#
# SYNOPSIS section and synopses
#
########################################################################

man_sgml('<REFSYNOPSISDIV>', "\n.SH SYNOPSIS\n");
man_sgml('</REFSYNOPSISDIV>', "\n");

## FIXME! Must be made into block elements!!
#sgml('<FUNCSYNOPSIS>', \&bold_on);
#sgml('</FUNCSYNOPSIS>', \&font_off);
#sgml('<CMDSYNOPSIS>', \&bold_on);
#sgml('</CMDSYNOPSIS>', \&font_off);

man_sgml('<FUNCSYNOPSIS>', sub {
	man_output("\n.sp\n");
	bold_on();
});
man_sgml('</FUNCSYNOPSIS>', sub {
	font_off();
	man_output("\n");
});

man_sgml('<CMDSYNOPSIS>', "\n\n");
man_sgml('</CMDSYNOPSIS>', "\n\n");

man_sgml('<FUNCPROTOTYPE>', "\n.sp\n");

# Arguments to functions.  This is C convention.
sub paramdef
{
	if($_[0]->parent->ext->{'inparams'}) {
		output ', ';
	} else {
		output ' (';
		$_[0]->parent->ext->{'inparams'} = 1;
	}
}
man_sgml('<PARAMDEF>', \&paramdef);
man_sgml('</FUNCPROTOTYPE>', ");\n");
man_sgml('<VOID>', "(void");
man_sgml('<VARARGS>', "(...");



sub group_start
{
	if(not $_[0]->parent->in('TERM')) {
		if($_[0]->attribute('CHOICE')->value =~ /opt/i) {
			output ' [';
		} elsif($_[0]->attribute('CHOICE')->value =~ /req/i) {
			output ' {';
		}
	}
	$_[0]->ext->{'count'} = 1;
}
sub group_end
{
	if($_[0]->attribute('REP')->value =~ /^Repeat/i) {
		italic_on();
		output ' ...';
		font_off();
	}
	if(not $_[0]->parent->in('TERM')) {
		if($_[0]->attribute('CHOICE')->value =~ /opt/i) {
			output ' ]';
		} elsif($_[0]->attribute('CHOICE')->value =~ /req/i) {
			output ' }';
		}
	}
}

sub arg_start
{
	# my $choice = $_[0]->attribute('CHOICE')->value;

	# The content model for CmdSynopsis doesn't include #PCDATA,
	# so we won't see any of the whitespace in the source file,
	# so we have to add it after each component.
	output ' ';

	if($_[0]->in('GROUP')) {
		output '| ' if $_[0]->parent->ext->{'count'} > 1;
		$_[0]->parent->ext->{'count'}++;
	} elsif($_[0]->attribute('CHOICE')->value =~ /opt/i) {
		output '[ ';
	}
	bold_on();
}
sub arg_end
{
	font_off();
	if($_[0]->attribute('REP')->value =~ /^Repeat/i) {
		italic_on();
		output ' ...';
		font_off();
	}
	if($_[0]->attribute('CHOICE')->value =~ /opt/i and
           not $_[0]->in('GROUP')) {
		output ' ]';
	}
}

sgml('<ARG>', \&arg_start);
sgml('</ARG>', \&arg_end);
sgml('<GROUP>', \&group_start);
sgml('</GROUP>', \&group_end);

sgml('<OPTION>', \&bold_on);
sgml('</OPTION>', \&font_off);

man_sgml('<SBR>', "\n   ");


########################################################################
#
# General sections
#
########################################################################

# The name of the section is handled by TITLE.  This just sets
# up the roff markup.
man_sgml('<REFSECT1>', "\n.SH ");
man_sgml('<REFSECT2>', "\n.SS ");
man_sgml('<REFSECT3>', "\n.SS ");


########################################################################
#
# Titles, metadata.
#
########################################################################

sgml('<TITLE>', sub {
	if($_[0]->in('REFERENCE') or $_[0]->in('BOOK')) {
		$write_manpages = 1;
	}
	save_cdata();
});
sgml('</TITLE>', sub { 
	my $title = fold_string(pop_output());
	$raw_cdata--;
	
	if($_[0]->in('REFERENCE') or $_[0]->in('BOOK')) {
		# We use TITLE of enclosing Reference or Book as manual name
		$manpage_manual = $title;
		$write_manpages = 0;
	}
	elsif(exists $_[0]->parent->ext->{'title'}) {
		# By far the easiest case.  Just fold the string as
		# above, and then set the parent element's variable.
		$_[0]->parent->ext->{'title'} = $title;
	}
	else {
		# If the parent element's handlers are lazy, 
		# output the folded string for them :)
		# We assume they want uppercase and a newline.
		output '"', uc($title), "\"\n";
		$newline_last = 1;
	}
});

sgml('<ATTRIBUTION>', sub { push_output('string') });
sgml('</ATTRIBUTION>', sub { $_[0]->parent->ext->{'attribution'} = pop_output(); });


sgml('<DATE>', sub {
	save_cdata();
});
sgml('</DATE>', sub { 
	$manpage_date = fold_string(pop_output());
	$raw_cdata--;
});


# IGNORE.
sgml('<DOCINFO>', sub { push_output('nul'); });
sgml('</DOCINFO>', sub { pop_output(); });
sgml('<REFSECT1INFO>', sub { push_output('nul'); });
sgml('</REFSECT1INFO>', sub { pop_output(); });
sgml('<REFSECT2INFO>', sub { push_output('nul'); });
sgml('</REFSECT2INFO>', sub { pop_output(); });
sgml('<REFSECT3INFO>', sub { push_output('nul'); });
sgml('</REFSECT3INFO>', sub { pop_output(); });

sgml('<INDEXTERM>', sub { push_output('nul'); });
sgml('</INDEXTERM>', sub { pop_output(); });


########################################################################
#
# Set bold on enclosed content 
#
########################################################################

sgml('<APPLICATION>', \&bold_on);	sgml('</APPLICATION>', \&font_off);

sgml('<CLASSNAME>', \&bold_on);		sgml('</CLASSNAME>', \&font_off);
sgml('<STRUCTNANE>', \&bold_on);	sgml('</STRUCTNAME>', \&font_off);
sgml('<STRUCTFIELD>', \&bold_on);	sgml('</STRUCTFIELD>', \&font_off);
sgml('<SYMBOL>', \&bold_on);		sgml('</SYMBOL>', \&font_off);
sgml('<TYPE>', \&bold_on);		sgml('</TYPE>', \&font_off);

sgml('<ENVAR>', \&bold_on);	sgml('</ENVAR>', \&font_off);

sgml('<FUNCTION>', \&bold_on);	sgml('</FUNCTION>', \&font_off);

sgml('<EMPHASIS>', \&bold_on);	sgml('</EMPHASIS>', \&font_off);

sgml('<ERRORNAME>', \&bold_on);	sgml('</ERRORNAME>', \&font_off);
# ERRORTYPE

sgml('<COMMAND>', \&bold_on);	sgml('</COMMAND>', \&font_off);

sgml('<GUIBUTTON>', \&bold_on);	sgml('</GUIBUTTON>', \&font_off);
sgml('<GUIICON>', \&bold_on);	sgml('</GUIICON>', \&font_off);
# GUILABEL
# GUIMENU
# GUIMENUITEM
# GUISUBMENU
# MENUCHOICE
# MOUSEBUTTON

sgml('<ACCEL>', \&bold_on);	sgml('</ACCEL>', \&font_off);
sgml('<KEYCAP>', \&bold_on);	sgml('</KEYCAP>', \&font_off);
sgml('<KEYSYM>', \&bold_on);	sgml('</KEYSYM>', \&font_off);
# KEYCODE
# KEYCOMBO
# SHORTCUT

sgml('<USERINPUT>', \&bold_on);	sgml('</USERINPUT>', \&font_off);

sgml('<INTERFACEDEFINITION>', \&bold_on);
sgml('</INTERFACEDEFINITION>', \&font_off);

# May need to look at the CLASS
sgml('<SYSTEMITEM>', \&bold_on);
sgml('</SYSTEMITEM>', \&font_off);





########################################################################
#
# Set italic on enclosed content 
#
########################################################################

sgml('<FIRSTTERM>', \&italic_on);	sgml('</FIRSTTERM>', \&font_off);

sgml('<FILENAME>', \&italic_on);	sgml('</FILENAME>', \&font_off);
sgml('<PARAMETER>', \&italic_on);	sgml('</PARAMETER>', \&font_off);
sgml('<PROPERTY>', \&italic_on);	sgml('</PROPERTY>', \&font_off);

sgml('<REPLACEABLE>', sub {
	italic_on();
	if($_[0]->in('TOKEN')) {
		# When tokenizing, follow more 'intuitive' convention
		output "<";
	}
});
sgml('</REPLACEABLE>', sub {
	if($_[0]->in('TOKEN')) {
		output ">";
	}
	font_off();
});

sgml('<CITETITLE>', \&italic_on);	sgml('</CITETITLE>', \&font_off);
sgml('<FOREIGNPHRASE>', \&italic_on);	sgml('</FOREIGNPHRASE>', \&font_off);

sgml('<LINEANNOTATION>', \&italic_on);	sgml('</LINEANNOTATION>', \&font_off);






########################################################################
#
# Other 'inline' elements 
#
########################################################################

man_sgml('<EMAIL>', '<');
man_sgml('</EMAIL>', '>');
man_sgml('<OPTIONAL>', '[');
man_sgml('</OPTIONAL>', ']');

man_sgml('</TRADEMARK>', "\\u\\s-2TM\\s+2\\d");

man_sgml('<COMMENT>', "[Comment: ");
man_sgml('</COMMENT>', "]");

man_sgml('<QUOTE>', "``");
man_sgml('</QUOTE>', "''");

#man_sgml('<LITERAL>', '"');
#man_sgml('</LITERAL>', '"');

# No special presentation:

# AUTHOR
# AUTHORINITIALS

# ABBREV
# ACTION
# ACRONYM
# ALT
# CITATION
# PHRASE
# QUOTE
# WORDASWORD

# COMPUTEROUTPUT
# MARKUP
# PROMPT
# RETURNVALUE
# SGMLTAG
# TOKEN

# DATABASE
# HARDWARE
# INTERFACE
# MEDIALABEL

# There doesn't seem to be a good way to represent LITERAL in -man



########################################################################
#
# Paragraph and paragraph-like elements 
#
########################################################################

sub para_start {
	output "\n" unless $newline_last++;

	# In lists, etc., don't start paragraph with .PP since
	# the indentation will be gone.

	if($_[0]->parent->ext->{'nobreak'}==1) {
		# Usually this is the FIRST element of
		# a hanging tag, so we MUST not do a full
		# paragraph break.
		$_[0]->parent->ext->{'nobreak'} = 2;
	} elsif($_[0]->parent->ext->{'nobreak'}==2) {
		# Usually these are the NEXT elements of
		# a hanging tag.  If we break using a blank
		# line, we're okay.
		output "\n";
	} else {
		# Normal case. (For indented blocks too, at least
		# -man isn't so braindead in this area.)
		output ".PP\n";
	}
}
# Actually applies to a few other block elements as well
sub para_end {
	output "\n" unless $newline_last++; 
}

sgml('<PARA>', \&para_start);
sgml('</PARA>', \&para_end);
sgml('<SIMPARA>', \&para_start);
sgml('</SIMPARA>', \&para_end);

# Nothing special, except maybe FIXME set nobreak.
sgml('<INFORMALEXAMPLE>', \&para_start);
sgml('</INFORMALEXAMPLE>', \&para_end);





########################################################################
#
# Blocks using SS sections
#
########################################################################

# FIXME: We need to consider the effects of SS
# in a hanging tag :(

# Complete with the optional-title dilemma (again).
sgml('<ABSTRACT>', sub {
	$_[0]->ext->{'title'} = 'ABSTRACT';
	output "\n" unless $newline_last++;
	push_output('string');
});
sgml('</ABSTRACT>', sub {
	my $content = pop_output();
	
	# As ABSTRACT is never on the same level as RefSect1,
	# this leaves us with only .SS in terms of -man macros.
	output ".SS \"", uc($_[0]->ext->{'title'}), "\"\n";

	output $content;
	output "\n" unless $newline_last++;
});

# Ah, I needed a break.  Example always has a title.
man_sgml('<EXAMPLE>', "\n.SS ");
sgml('</EXAMPLE>', \&para_end);

# Same with sidebar.
man_sgml('<SIDEBAR>', "\n.SS ");
sgml('</SIDEBAR>', \&para_end);

# NO title.
man_sgml('<HIGHLIGHTS>', "\n.SS HIGHLIGHTS\n");
sgml('</HIGHLIGHTS>', \&para_end);




########################################################################
#
# Indented 'Block' elements 
#
########################################################################

sub indent_block_start
{
	output "\n" unless $newline_last++;
	output ".sp\n.RS\n";
}
sub indent_block_end
{
	output "\n" unless $newline_last++;
	output ".RE\n";
}

# This element is almost like an admonition (below),
# only the default title is blank :)

sgml('<BLOCKQUOTE>', sub { 
	$_[0]->ext->{'title'} = ''; 
	output "\n" unless $newline_last++;
	push_output('string');
});
sgml('</BLOCKQUOTE>', sub {
	my $content = pop_output();

	indent_block_start();
	
	if($_[0]->ext->{'title'}) {
		output ".B \"", $_[0]->ext->{'title'}, ":\"\n";
	}
	
	output $content;

	if($_[0]->ext->{'attribution'}) {
		output "\n" unless $newline_last++;
		# One place where roff's space-sensitivity makes sense :)
		output "\n                -- ";
		output $_[0]->ext->{'attribution'} . "\n";
	}
	
	indent_block_end();
});

# Set off admonitions from the rest of the text by indenting.
# FIXME: Need to check if this works inside paragraphs, not enclosing them.
sub admonition_end {
	my $content = pop_output();

	indent_block_start();
	
	# When the admonition is only one paragraph,
	# it looks nicer if the title was inline.
	my $num_para;
	while ($content =~ /^\.PP/gm) { $num_para++ }
	if($num_para==1) {
		$content =~ s/^\.PP\n//;
	}
	
	output ".B \"" . $_[0]->ext->{'title'} . ":\"\n";
	output $content;
	
	indent_block_end();
}

sgml('<NOTE>', sub {
	# We can't see right now whether or not there is a TITLE
	# element, so we have to save the output now and add it back
	# at the end of this admonition.
	$_[0]->ext->{'title'} = 'Note';

	# Although admonition_end's indent_block_start will do this,
	# we need to synchronize the output _now_
	output "\n" unless $newline_last++;

	push_output('string');
});
sgml('</NOTE>', \&admonition_end);

# Same as above.
sgml('<WARNING>', sub { 
	$_[0]->ext->{'title'} = 'Warning'; 
	output "\n" unless $newline_last++;
	push_output('string');
});
sgml('</WARNING>', \&admonition_end);

sgml('<TIP>', sub {
	$_[0]->ext->{'title'} = 'Tip';
	output "\n" unless $newline_last++;
	push_output('string');
});
sgml('</TIP>', \&admonition_end);
sgml('<CAUTION>', sub {
	$_[0]->ext->{'title'} = 'Caution';
	output "\n" unless $newline_last++;
	push_output('string');
});
sgml('</CAUTION>', \&admonition_end);

sgml('<IMPORTANT>', sub {
	$_[0]->ext->{'title'} = 'Important';
	output "\n" unless $newline_last++;
	push_output('string');
});
sgml('</IMPORTANT>', \&admonition_end);












########################################################################
#
# Verbatim displays. 
#
########################################################################

sub verbatim_start {
	output "\n" unless $newline_last++;
	
	if($_[0]->parent->ext->{'nobreak'}==1) {
		# Usually this is the FIRST element of
		# a hanging tag, so we MUST not do a full
		# paragraph break.
		$_[0]->parent->ext->{'nobreak'} = 2;
	} else {
		output "\n";
	}
	
	output(".nf\n") unless $nocollapse_whitespace++;
}

sub verbatim_end {
	output "\n" unless $newline_last++;
	output(".fi\n") unless --$nocollapse_whitespace;
}

sgml('<PROGRAMLISTING>', \&verbatim_start); 
sgml('</PROGRAMLISTING>', \&verbatim_end);

sgml('<SCREEN>', \&verbatim_start); 
sgml('</SCREEN>', \&verbatim_end);

sgml('<LITERALLAYOUT>', \&verbatim_start); 
sgml('</LITERALLAYOUT>', \&verbatim_end);

#sgml('<SYNOPSIS>', sub {
#	if($_[0]->attribute('FORMAT')->value =~ /linespecific/i) {
#		&verbatim_start;
#	} else {
#		roffcmd("");
#	}
#});
#
#sgml('</SYNOPSIS>', sub {
#	if($_[0]->attribute('FORMAT')->value =~ /linespecific/i) {
#		&verbatim_end;
#	}
#	else {
#		roffcmd("");# not sure about this.
#	}
#});
sgml('<SYNOPSIS>', \&verbatim_start);
sgml('</SYNOPSIS>', \&verbatim_end);









########################################################################
#
# Lists
#
########################################################################

# Indent nested lists.
sub indent_list_start {
	if($list_nestlevel++) {
		output "\n" unless $newline_last++;
		output ".RS\n";
	}
}
sub indent_list_end {
	if(--$list_nestlevel) {
		output "\n" unless $newline_last++;
		output ".RE\n";
	}
}

sgml('<VARIABLELIST>', \&indent_list_start);
sgml('</VARIABLELIST>', \&indent_list_end);
sgml('<ITEMIZEDLIST>', \&indent_list_start);
sgml('</ITEMIZEDLIST>', \&indent_list_end);
sgml('<ORDEREDLIST>', sub { 
	indent_list_start();
	$_[0]->ext->{'count'} = 1;
});
sgml('</ORDEREDLIST>', \&indent_list_end);
sgml('<GLOSSLIST>', \&indent_list_start);
sgml('</GLOSSLIST>', \&indent_list_end);
		
# Output content on one line, bolded.
sgml('<TERM>', sub { 
	output "\n" unless $newline_last++;
	output ".TP\n";
	bold_on();
	push_output('string');
});
sgml('</TERM>', sub { 
	my $term = pop_output();
	$term =~ tr/\n/ /;
	output $term;
	font_off();
	output "\n";
	$newline_last = 1;
});
sgml('<GLOSSTERM>', sub { 
	output "\n" unless $newline_last++;
	output ".TP\n";
	bold_on();
	push_output('string');
});
sgml('</GLOSSTERM>', sub { 
	my $term = pop_output();
	$term =~ tr/\n/ /;
	output $term;
	font_off();
	output "\n";
	$newline_last = 1;
});
	
sgml('<LISTITEM>', sub {
	# A bulleted list.
	if($_[0]->in('ITEMIZEDLIST')) {
		output "\n" unless $newline_last++;
		output ".TP 0.2i\n\\(bu\n";
	}

	# Need numbers.
	# Assume Arabic numeration for now.
	elsif($_[0]->in('ORDEREDLIST')) {
		output "\n" unless $newline_last++;
		output ".TP 3\n", $_[0]->parent->ext->{'count'}++, ". \n";
	}
	
	$_[0]->ext->{'nobreak'} = 1;
});
sgml('<GLOSSDEF>', sub {
	$_[0]->ext->{'nobreak'} = 1;
});

sgml('<SIMPLELIST>', sub {
	$_[0]->ext->{'first_member'} = 1;
});

sgml('<MEMBER>', sub {
	my $parent = $_[0]->parent;
	
	if($parent->attribute('TYPE')->value =~ /Inline/i) {
		if($parent->ext->{'first_member'}) { 
			# If this is the first member don't put any commas
			$parent->ext->{'first_member'} = 0;
		} else {
			output ", ";
		}
	} elsif($parent->attribute('TYPE')->value =~ /Vert/i) {
		output "\n" unless $newline_last++;
		output "\n";
	}
});





########################################################################
#
# Stuff we don't know how to handle (yet) 
#
########################################################################

# Address blocks:

# Credit stuff:
# ACKNO
# ADDRESS
# AFFILIATION
# ARTPAGENUMS
# ATTRIBUTION
# AUTHORBLURB
# AUTHORGROUP
# OTHERCREDIT
# HONORIFIC

# Areas:
# AREA
# AREASET
# AREASPEC





########################################################################
#
# Linkage, cross references
#
########################################################################

# Print the URL
sgml('</ULINK>', sub {
	output ' <URL:', $_[0]->attribute('URL')->value, '>';
	$newline_last = 0;
});

# If cross reference target is a RefEntry, 
# output CiteRefEntry-style references.
sgml('<XREF>', sub {
	my $id = $_[0]->attribute('LINKEND')->value;
	my $manref = $Refs->get("refentry:$id");

	if($manref) {
		my ($title, $sect) = ($manref =~ /(.*)(\(.*\))/);
		bold_on();
		output $title;
		font_off();
		output $sect;
	} else {
		$blank_xrefs++ if $write_manpages;
		output "[XRef to $id]";
	}

	$newline_last = 0;
});

# Anchor




########################################################################
#
# Other handlers 
#
########################################################################

man_sgml('|[lt    ]|', '<');
man_sgml('|[gt    ]|', '>');
man_sgml('|[amp   ]|', '&');
man_sgml('|[minus ]|', '-');
man_sgml('|[copy  ]|', '(C)');
man_sgml('|[nbsp  ]|', '\~');
man_sgml('|[thinsp]|', '\~');

#
# Default handlers (uncomment these if needed).  Right now, these are set
# up to gag on any unrecognised elements, sdata, processing-instructions,
# or entities.
#
# sgml('start_element',sub { die "Unknown element: " . $_[0]->name; });
# sgml('end_element','');

# This is for weeding out and escaping certain characters.
# This looks like it's inefficient since it's done on every line, but
# in reality, SGMLSpm and sgmlspl parsing ESIS takes _much_ longer.

sgml('cdata', sub
{ 
	if(!$write_manpages) { return; }
	elsif($raw_cdata) { output $_[0]; return; }
	
	# Escape backslashes
	$_[0] =~ s/\\/\\\\/g;

	# Escape dots and single quotes in column 1
	$_[0] =~ s/^([ \t]*)\./$1\\\&\./;
	$_[0] =~ s/^([ \t]*)\'/$1\\\&\'/;

	# In non-'pre'-type elements:
	if(!$nocollapse_whitespace) {
		# Change tabs to spaces
		$_[0] =~ tr/\t/ /;

		# Do not allow indents at beginning of line
		# groff chokes on that.
		if($newline_last) { 
			$_[0] =~ s/^ +//;

			# If the line is all blank, don't do anything.
			if($_[0] eq '') { return; }
		}
	}

	$newline_last = 0;

	output $_[0];
});


# When in whitespace-collapsing mode, we disallow consecutive newlines.

sgml('re', sub
{
	if($nocollapse_whitespace || !$newline_last) {
		output "\n";
	}

	$newline_last = 1;
});

sgml('sdata',sub
{
	die "Unknown SDATA: " . $_[0];
});
sgml('pi',sub { die "Unknown processing instruction: " . $_[0]; });
sgml('entity',sub { die "Unknown external entity: " . $_[0]->name; });
sgml('start_subdoc',sub { die "Unknown subdoc entity: " . $_[0]->name; });
sgml('end_subdoc','');
sgml('conforming','');

1;