Web.pm

   1 # $Id$
   2 # Common functions for HTML/XHTML output generation
   3 # Copyright (C) 2003 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; exactly version 2 of June 1991 is required
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18
  19 package My::Web;
  20 require 5.6.0;  # at least 'use warnings;' but we need some 5.6.0+ modules anyway
  21 our $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
  22 our $CVS_ID=q$Id$;
  23 use strict;
  24 use warnings;
  25
  26 use Exporter;
  27 sub Wrequire ($);
  28 sub Wuse ($@);
  29 our $W;
  30 our @EXPORT=qw(&Wrequire &Wuse &a_href &a_href_cz &vskip &img &centerimg $W &top_dir &top_dir_disk);
  31 our @ISA=qw(Exporter);
  32
  33 BEGIN
  34 {
  35         sub Wrequire ($)
  36         {
  37         my($file)=@_;
  38
  39 #               print STDERR "Wrequire $file\n";
  40                 $file=~s#/#::#g;
  41                 $file=~s/[.]pm$//;
  42                 my $class=$file;
  43                 $file=~s#::#/#g;
  44                 $file.=".pm";
  45                 my $aref=($W->{"packages_used"}{$Apache::Registry::curstash}||=[]);
  46                 push @$aref,$class
  47                                 if !{ map(($_=>1),@$aref) }->{$class};  # Prevent duplicated entries.
  48                 CORE::require $file;
  49                 1;      # Otherwise 'require' would already file above.
  50         }
  51
  52         sub Wuse ($@)
  53         {
  54         my($file,@list)=@_;
  55
  56 #               print STDERR "Wuse $file\n";
  57                 Wrequire $file;
  58                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  59                 $file->import(@list);
  60                 1;
  61         }
  62 }
  63
  64 BEGIN { Wuse 'WebConfig'; }     # for %WebConfig
  65 require CGI;    # for &escapeHTML
  66 require Image::Size;    # for &imgsize
  67 use File::Basename;     # &basename
  68 use Carp qw(cluck confess);
  69 use URI::Escape;
  70 require HTTP::BrowserDetect;
  71 require HTTP::Negotiate;
  72 require Geo::IP;
  73 require CGI;
  74
  75
  76 # Undo 'www/engine/httpd-restart' as it may use obsolete Perl for 'mod_perl'
  77 delete $ENV{"PERLLIB"};
  78 delete $ENV{"LD_LIBRARY_PATH"};
  79
  80
  81 #our $W;
  82                 # $W->{"title"}
  83                 # $W->{"head"}
  84                 # $W->{"head_css"}
  85                 # $W->{"force_charset"}
  86                 # %{$W->{"packages_used"}
  87                 # $W->{"heading_done"}
  88                 # $W->{"footer_passed"}
  89                 # %{$W->{"headers"}}
  90                 # %{$W->{"headers_lc"}} # maps lc($headers_key)=>$headers_key
  91                 # @{$W->{"packages_used"}{$Apache::Registry::curstash}}}
  92                 # %{$W->{"args"}}
  93
  94 sub init ($%)
  95 {
  96 my($class,%args)=@_;
  97
  98         my $packages_used_save=$W->{"packages_used"};
  99         $W={ %WebConfig,%args };        # override %WebConfig settings
 100         $W->{"packages_used"}=$packages_used_save;
 101
 102         $W->{"__PACKAGE__"}||="Apache::ROOT".$Apache::Registry::curstash;
 103
 104         $W->{"top_dir"}||=eval '$'.$W->{"__PACKAGE__"}.'::top_dir';
 105
 106         do { $W->{$_}=0  if !defined $W->{$_}; } for ("detect_ent");
 107         do { $W->{$_}=0  if !defined $W->{$_}; } for ("detect_js");
 108         do { $W->{$_}=1  if !defined $W->{$_}; } for ("have_css");      # AFAIK it does not hurt anyone.
 109         do { $W->{$_}=1  if !defined $W->{$_}; } for ("heading");
 110         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer");
 111         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_delimit");
 112         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_mailme");
 113         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_ids");
 114         do { $W->{$_}=1  if !defined $W->{$_}; } for ("indexme");
 115         do { $W->{$_}="" if !defined $W->{$_}; } for ("head");
 116         do { $W->{$_}="" if !defined $W->{$_}; } for ("head_css");
 117
 118         my $footer_any=0;
 119         for (qw(footer_mailme footer_ids)) {
 120                 $W->{$_}=0 if !$W->{"footer"};
 121                 $footer_any=1 if $W->{$_};
 122                 }
 123         $W->{"footer"}=0 if !$footer_any;
 124         $W->{"footer_delimit"}=0 if !$W->{"footer"};
 125
 126         $W->{"r"}=Apache->request();
 127
 128         $W->{"QUERY_STRING"}=$W->{"r"}->args() || "";
 129            if ($W->{"QUERY_STRING"}=~/[&]amp;have_ent/)
 130                 { $W->{"have_ent"}=0; }
 131         elsif ($W->{"QUERY_STRING"}=~    /[&]have_ent/)
 132                 { $W->{"have_ent"}=1; }
 133         else
 134                 { delete $W->{"have_ent"}; }
 135         if ($W->{"detect_ent"} && !defined $W->{"have_ent"} && $W->{"r"}->method() eq "GET") {
 136                 $W->{"head"}.='<meta http-equiv="Refresh" content="0; URL='
 137                                 .CGI::escapeHTML("http://".$W->{"r"}->hostname()."/".($W->{"r"}->uri()=~m#^/*(.*)$#)[0]
 138                                                 ."?".($W->{"QUERY_STRING"} || "detect_ent_glue=1").'&have_ent=detect')
 139                                 .'" />'."\n";
 140                 }
 141         $W->{"QUERY_STRING"}=~s/([&])amp;/$1/g;
 142         $W->{"r"}->args($W->{"QUERY_STRING"});
 143         $ENV{"QUERY_STRING"}=$W->{"QUERY_STRING"};
 144         # Do not: $W->{"r"}->args()
 145         # as it  parses only QUERY_STRING (not POST data).
 146         $W->{"args"}={ CGI->new()->Vars() };
 147
 148         do { $W->{$_}=$ENV{"HTTP_ACCEPT"} if !defined $W->{$_}; } for ("accept");
 149         do { $W->{$_}=$ENV{"HTTP_USER_AGENT"} if !defined $W->{$_}; } for ("user_agent");
 150
 151         $W->{"browser"}=HTTP::BrowserDetect->new($W->{"user_agent"});
 152
 153         if (!defined $W->{"have_style"}) {
 154                 $W->{"have_style"}=(!$W->{"browser"}->netscape() || $W->{"browser"}->major>4 ? 1 : 0);
 155                 }
 156
 157         $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
 158         if ($W->{"detect_js"} && !$W->{"have_js"}) {
 159                 $W->{"head"}.='<script type="text/javascript" src="'.top_dir('/have_js.js.pl').'"></script>'."\n";
 160                 }
 161
 162         do { args_check(%$_) if $_; } for ($W->{"args_check"});
 163
 164         return $W;
 165 }
 166
 167 sub top_dir_disk ()
 168 {
 169         do { return $_ if $_; } for ($W->{"top_dir"});
 170         return $INC[0]; # fallback
 171 }
 172
 173 sub top_dir (;$)
 174 {
 175 my($in)=@_;
 176
 177         if (my $uri=$ENV{"REQUEST_URI"}) {
 178                 $uri.="Index" if $uri=~m#/$#;
 179                 if (defined $in) {
 180                         my($inpath,$inquery)=split /[?]/,$in,2;
 181                         $inpath=~tr///cs;
 182                         $uri=~tr///cs;
 183                         for (;;) {
 184                                 my($in1 ,$in2 )=($in =~m#^(/[^/]+)(/.*)$#);
 185                                 my($uri1,$uri2)=($uri=~m#^(/[^/]+)(/.*)$#);
 186                                 last if !defined $in1 || !defined $uri1 || $in1 ne $uri1;
 187                                 $in=$in2;
 188                                 $uri=$uri2;
 189                                 }
 190                         }
 191                 $uri=~s#^/*##;
 192                 $uri=~s#[^/]+#..#g;
 193                 $uri=File::Basename::dirname($uri);
 194                 my $r=$uri.(defined $in ? $in : "");
 195 #               1 while $r=~s#^[.]/##;
 196 #               $r="./$r" if $r=~m#^(?:?.*)$#;  # empty pathname?
 197                 return $r;
 198                 }
 199         return top_dir_disk().$in;
 200 }
 201
 202 sub fatal (;$);
 203
 204 sub args_check (%)
 205 {
 206 my(%tmpl)=@_;
 207
 208         while (my($name,$regex)=each(%tmpl)) {
 209                 my $name_html="Parameter <span class=\"quote\">".CGI::escapeHTML($name)."</span>";
 210                 $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
 211                 my $val=$W->{"args"}{$name};
 212                 $val="" if !defined $val;
 213                 fatal "$name_html <span class=\"quote\">".CGI::escapeHTML($val)."</span>"
 214                                                 ." does not match required regex <span class=\"quote\">".CGI::escapeHTML($regex)."</span> "
 215                                 if $regex ne "" && $val!~/$regex/;
 216                 }
 217 }
 218
 219 sub vskip (;$)
 220 {
 221 my($height)=@_;
 222
 223         return '<p'.(!defined $height ? "" : ' style="height: '.$height.';"').'>&nbsp;</p>'."\n";
 224 }
 225
 226 sub fatal (;$)
 227 {
 228 my($msg)=@_;
 229
 230         $msg="UNKNOWN" if !$msg;
 231
 232 #       heading(false/*title*/,false/*indexme*/);       # notitle is always safe, don't index the error message
 233         print "\n".vskip("3ex")."<hr /><h1 class=\"error\">FATAL ERROR: $msg!</h1>\n"
 234                         ."<p>You can report this problem's details to"
 235                         ." ".a_href("mailto:".$W->{"admin_mail"},"admin of this website").".</p>\n";
 236         footer();
 237 }
 238
 239 sub footer (;$)
 240 {
 241         exit 1 if $W->{"footer_passed"}++;      # deadlock prevention:
 242
 243         print vskip if $W->{"footer_delimit"};
 244
 245         print "<hr />\n" if $W->{"footer"};
 246
 247         if ($W->{"footer_mailme"}) {
 248                 print '<form action="'.top_dir('/SendMsg.pl').'" method="post" onsubmit="'
 249                                 ."this.elements['msgscript'].value=this.elements['msghtml'].value;"
 250                                 ."this.elements['msghtml'].value='';"
 251                                 ."this.submit();"
 252                                 .'">'."\n";
 253                         print '<p align="right">'."\n";
 254                                 print '<input name="msgscript" type="hidden" />'."\n";
 255                                 print '<input name="msghtml" type="text" size="32" alt="Message" />'."\n";
 256                                 print '<input name="submit" type="submit" value="Quick Note" />'."\n";
 257                         print '</p>'."\n";
 258                 print '</form>'."\n";
 259                 }
 260
 261         if ($W->{"footer_ids"}) {
 262                 print '<p class="cvs-id">';
 263                 print join("<br />\n",map({ my $package=$_;
 264                         my $cvs_id=(eval('$'.$package."::CVS_ID")
 265 #                                       || $package     # debug
 266                                         );
 267                         if (!$cvs_id) {
 268                                 ();
 269                                 }
 270                         else {
 271                                 $cvs_id='$'.$cvs_id.'$';        # Eaten by 'q' operator.
 272                                 my @cvs_id_split=split / +/,$cvs_id;
 273                                 if (@cvs_id_split==8) {
 274                                         my $file=$package;
 275                                         $file=~s#::#/#g;
 276                                         my $ext;
 277                                         for (qw(.html.pl .pl .pm),"") {
 278                                                 $ext=$_;
 279                                                 last if -r top_dir_disk()."/$file$ext";
 280                                                 cluck "Class file $file not found" if !$ext;
 281                                                 }
 282                                         $file.=$ext;
 283                                         $cvs_id_split[2]=""
 284                                                         .a_href((map({ my $s=$_; $s=~s#/viewcvs/#$&~checkout~/#; $s; } $W->{"viewcvs"}))[0]."$file?rev=".$cvs_id_split[2],
 285                                                                         $cvs_id_split[2]);
 286                                         $cvs_id_split[1]=a_href($W->{"viewcvs"}.$file,
 287                                                         ($package!~/^Apache::/ ? $package : $cvs_id_split[1]));
 288                                         $cvs_id_split[5]=&{$W->{"cvs_id_author"}}($cvs_id_split[5]);
 289                                         }
 290                                 join " ",@cvs_id_split;
 291                                 }
 292                         } (
 293                                         $W->{"__PACKAGE__"},
 294                                         __PACKAGE__,
 295                                         @{$W->{"packages_used"}{$Apache::Registry::curstash}},
 296                                         )));
 297                 print "</p>\n";
 298                 }
 299
 300         for my $package (
 301                         $W->{"__PACKAGE__"},
 302                         __PACKAGE__,
 303                         @{$W->{"packages_used"}{$Apache::Registry::curstash}},
 304                         ) {
 305                 my $cvs_id=(eval('$'.$package."::CVS_ID")
 306 #                               || $package     # debug
 307                                 );
 308                 print '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
 309                 }
 310
 311         if ($W->{"heading"}) {
 312                 do { &{$_}() if $_; } for ($W->{"footing"});
 313                 }
 314
 315         print "</body></html>\n";
 316         exit(0);
 317 }
 318
 319 sub header (%)
 320 {
 321 my(%pairs)=@_;
 322
 323         while (my($key,$val)=each(%pairs)) {
 324                 do { cluck "Headers already sent"; next; } if $W->{"heading_done"};
 325                 for ($W->{"headers_lc"}{lc $key} || ()) {
 326                         delete $W->{"headers"}{$_};
 327                         }
 328                 $W->{"headers_lc"}{lc $key}=$key;
 329                 $W->{"headers"}{$key}=$val;
 330                 }
 331 }
 332
 333 sub size_display ($)
 334 {
 335 my($size)=@_;
 336
 337            if ($size<4096)
 338                 {}
 339         elsif ($size<1024*1024)
 340                 { $size=sprintf "%.1fK",$size/1024; }
 341         else
 342                 { $size=sprintf "%.1fM",$size/1024/1024; }
 343         $size.="B";
 344         return $size;
 345 }
 346
 347 sub url_is_local ($)
 348 {
 349 my($url)=@_;
 350
 351         return $url!~m#^[a-z]+://#;
 352 }
 353
 354 sub a_href ($;$%)
 355 {
 356 my($url,$contents,%args)=@_;
 357
 358         do { $$_=1 if !defined $$_; } for (\$args{"size"});
 359         $contents=CGI::escapeHTML($url) if !defined $contents;
 360         $contents=~s#<a\b[^>]*>##gi;
 361         $contents=~s#</a>##gi;
 362
 363         $url=top_dir($url) if url_is_local $url && $url=~m#^/#;
 364
 365         my $r='<a href="';
 366         my $urlent=CGI::escapeHTML($url);
 367            if ($url eq $urlent)
 368                 { $r.=$url; }
 369         elsif (url_is_local $url)
 370                 { $r.=$urlent; }
 371         elsif (defined $W->{"have_ent"} && !$W->{"have_ent"})   # non-ent client
 372                 { $r.=$url; }
 373         elsif ($W->{"have_ent"})        # ent client
 374                 { $r.=$urlent; }
 375         else    # unknown client, &CGI::escapeHTML should not be needed here
 376                 { $r.=CGI::escapeHTML(top_dir('/Redirect.pl?location='.uri_escape($url))); }
 377         $r.='"';
 378         do { $r.=" $_" if $_; } for ($args{"attr"});
 379         $r.='>'.$contents.'</a>';
 380         if ($args{"size"} && url_is_local($url) && $url=~/[.](?:gz|Z|rpm|zip|deb|lha)/) {       # Downloadable?
 381                 $url=top_dir_disk().$url if $url=~m#^/#;
 382                 if (!-r $url)
 383                         { cluck "File not readable: $url"; }
 384                 else {
 385                         $r.='&nbsp;('.size_display((stat($url))[7]).')';
 386                         }
 387                 }
 388         return $r;
 389 }
 390
 391 sub remote_ip ()
 392 {
 393         # Do not: PerlModule                 Apache::ForwardedFor
 394         #         PerlPostReadRequestHandler Apache::ForwardedFor
 395         # As 'Apache::ForwardedFor' takes the first of $ENV{"HTTP_X_FORWARDED_FOR"}
 396         # while the contents is '127.0.0.1, 213.220.195.171' if client has its own proxy.
 397         # We must take the last item ourselves.
 398         my $r=$ENV{"HTTP_X_FORWARDED_FOR"} || $W->{"r"}->get_remote_host();
 399         $r=~s/^.*,\s*//;
 400         return $r;
 401 }
 402
 403 sub is_cz ()
 404 {
 405         return "CZ" eq Geo::IP->new()->country_code_by_addr(remote_ip());
 406 }
 407
 408 sub a_href_cz ($$;%)
 409 {
 410 my($url,$contents,%args)=@_;
 411
 412         return a_href $url,$contents,%args if is_cz();
 413         return $contents;
 414 }
 415
 416 sub make ($)
 417 {
 418 my($cmd)=@_;
 419
 420         system {'flock'} 'flock','-x',top_dir_disk(),$cmd.' >&2';
 421 }
 422
 423 sub img_size ($$)
 424 {
 425 my($width,$height)=@_;
 426
 427         return ($W->{"have_style"} ? "style=\"border:0;width:${width}px;height:${height}px\"" : "border=\"0\"")
 428                         ." width=\"$width\" height=\"$height\"";
 429 }
 430
 431 sub negotiate_variant (%)
 432 {
 433 my(%args)=@_;
 434
 435         my @fields=("id","qs","content-type","encoding","charset","lang","size");
 436         return [ map(($args{$_}),@fields) ];
 437 }
 438
 439 my @img_variants=(
 440                 { "id"=>"png","qs"=>1.0,"content-type"=>"image/png" },
 441                 { "id"=>"gif","qs"=>0.9,"content-type"=>"image/gif" },
 442                 );
 443 my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
 444
 445 sub img_src ($)
 446 {
 447 my($file_base)=@_;
 448
 449         if (!url_is_local($file_base)) {
 450                 return $file_base if !wantarray();
 451                 return ($file_base,$file_base);
 452                 }
 453         # Known image extension?
 454         if ($file_base=~m#$img_variants_re#o) {
 455                 return $file_base if !wantarray();
 456                 return ($file_base,$file_base) if $file_base!~m#^/#;
 457                 return (top_dir($file_base),top_dir_disk().$file_base);
 458                 }
 459
 460         my $file_base_disk;
 461         my $file_base_uri;
 462         if ($file_base!~m#^/#) {
 463                 $file_base_disk=$file_base_uri=$file_base;
 464                 }
 465         else {
 466                 $file_base_disk=top_dir_disk().$file_base;
 467                 $file_base_uri=top_dir($file_base);
 468                 }
 469
 470         my @nego_variants;
 471         for my $var (@img_variants) {
 472                 my $file=$file_base_disk.".".$var->{"id"};
 473                 # TODO: Somehow quickly check dependencies?
 474                 make('make -s --no-print-directory'
 475                                                 .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'")
 476                                 if !-f $file;
 477                 push @nego_variants,negotiate_variant(
 478                                 %$var,
 479                                 "size"=>(stat $file)[7],
 480                                 );
 481                 }
 482         # Do not: ,$W->{"r"});
 483         # but should we provide somehow either 'HTTP::Headers' or 'HTTP::Request' ?
 484         my $ext=HTTP::Negotiate::choose(\@nego_variants);
 485         $ext||=$img_variants[0]->{"id"};        # &HTTP::Negotiate::choose failed?
 486
 487         return $file_base_uri.".".$ext if !wantarray();
 488         return ($file_base_uri.".".$ext,$file_base_disk.".".$ext);
 489 }
 490
 491 sub img ($$;%)
 492 {
 493 my($file_base,$alt,%attr)=@_;
 494
 495         my($file_uri,$file_disk)=img_src $file_base;
 496         my($width,$height)=Image::Size::imgsize($file_disk);
 497         $alt=~s/<[^>]*>//g;
 498         $alt=CGI::escapeHTML($alt);
 499         my $content="<img src=\"$file_uri\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
 500                         .(!$attr{"attr"} ? "" : " ".$attr{"attr"})." />";
 501         return a_href img_src($attr{"a_href_img"}),$content if $attr{"a_href_img"};
 502         return a_href $attr{"a_href"},$content if $attr{"a_href"};
 503         return $content;
 504 }
 505
 506 sub centerimg
 507 {
 508         my $r.="";
 509         $r.='<table border="0" width="100%"><tr>'."\n";
 510         @_=( [@_] ) if !ref $_[0];
 511         for (@_) {
 512                 $r.="\t".'<td align="center">'.&{\&img}(@$_).'</td>'."\n";
 513                 }
 514         $r.='</tr></table>'."\n";
 515         return $r;
 516 }
 517
 518 sub readfile ($$)
 519 {
 520 my($class,$filename)=@_;
 521
 522         local *F;
 523         open F,$filename or die "Cannot open \"$filename\": $!";
 524         local $/=undef();
 525         my $data=<F>;
 526         close F;
 527         return $data;
 528 }
 529
 530 sub arr_keys (@)
 531 {
 532 my(@arr)=@_;
 533
 534         my @r=();
 535         while (@arr) {
 536                 push @r,shift @arr;     # key
 537                 shift @arr;     # val
 538                 }
 539         return @r;
 540 }
 541
 542 sub heading ()
 543 {
 544 my($class)=@_;
 545
 546         # $ENV{"CLIENT_CHARSET"} ignored (mod_czech support dropped!)
 547         my $client_charset=$W->{"force_charset"} || "us-ascii";
 548         header("Content-Style-Type"=>"text/css");
 549         header("Content-Script-Type"=>"text/javascript");
 550
 551         while (my($key,$val)=each(%{$W->{"headers"}})) {
 552                 $W->{"r"}->header_out($key,$val);
 553                 }
 554         $W->{"r"}->send_http_header("text/html; charset=$client_charset");      # "Content-type"; do not use header()
 555
 556         return if $W->{"heading_done"}++;
 557         exit if $W->{"r"}->header_only();
 558
 559         if (1) { # || !$msie_major || $msie_major>=4) # TODO:dyn
 560                 print '<?xml version="1.0" encoding="'.$client_charset.'"?>'."\n";
 561                 }
 562         print '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'."\n";
 563         print '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">'."\n";
 564         my $title=$W->{"title_prefix"}.join("",map({ ': '.$_; } ($W->{"title"} || ())));
 565         $title=~s#<[^>]*>##g;
 566         print "<head>";
 567         print "<title>$title</title>\n";
 568
 569         if ($W->{"have_css"}) {
 570                 print <<'HERE';
 571 <style type="text/css"><!--
 572 .cvs-id   { font-family: monospace; }
 573 .error    { color: red;   background-color: transparent; }
 574 .quote    { font-family: monospace; }
 575 .nowrap   { white-space: nowrap; }
 576 .centered { text-align: center; }
 577 .tab-bold { font-weight: bold; }
 578 .tab-head { font-weight: bold; color: yellow; background-color: transparent; }
 579 body {
 580                 background-color: black;
 581                 color: white;
 582                 }
 583 :link    { color: aqua;   background-color: transparent; }
 584 :visited { color: teal;   background-color: transparent; }
 585 h1,h2    { color: yellow; background-color: transparent; }
 586 td       { padding: 2px; }
 587 caption  { caption-side: bottom; }
 588 .footer img { vertical-align: middle; }
 589 HERE
 590                 print $W->{"head_css"}."\n";
 591                 print "--></style>\n";
 592                 }
 593
 594         print '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
 595         print $W->{"head"};
 596         for my $type (qw(prev next index contents start up)) {
 597                 do { print '<link rel="'.$type.'" href="'.$_.'" />'."\n" if $_; } for ($W->{"rel_$type"});
 598                 }
 599         print "</head><body";
 600         print ' bgcolor="black" text="white" link="aqua" vlink="teal"'
 601                         if $W->{"browser"}->netscape() && $W->{"browser"}->major<=4;
 602         print ">\n";
 603
 604         if ($W->{"heading"}) {
 605                 do { &{$_}() if $_; } for ($W->{"heading"});
 606                 }
 607 }
 608
 609 1;