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 &rightimg $W &top_dir &top_dir_disk &Wprint);
  31 our @ISA=qw(Exporter);
  32
  33 BEGIN
  34 {
  35         $W->{"__My::Web_init"}=1;
  36
  37         sub Wrequire ($)
  38         {
  39         my($file)=@_;
  40
  41 #               print STDERR "Wrequire $file\n";
  42                 $file=~s#/#::#g;
  43                 $file=~s/[.]pm$//;
  44                 my $class=$file;
  45                 $file=~s#::#/#g;
  46                 $file.=".pm";
  47                 my $who=$W->{"__PACKAGE__"};
  48                 $who||="__My::Web" if $W->{"__My::Web_init"};
  49                 my $aref=($W->{"packages_used"}{$who}||=[]);
  50                 push @$aref,$class
  51                                 if !{ map(($_=>1),@$aref) }->{$class};  # Prevent duplicated entries.
  52                 CORE::require $file;
  53                 1;      # Otherwise 'require' would already file above.
  54         }
  55
  56         sub Wuse ($@)
  57         {
  58         my($file,@list)=@_;
  59
  60 #               print STDERR "Wuse $file\n";
  61                 Wrequire $file;
  62                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  63                 $file->import(@list);
  64                 1;
  65         }
  66 }
  67
  68 BEGIN { Wuse 'WebConfig'; }     # for %WebConfig
  69 require CGI;    # for &escapeHTML
  70 require Image::Size;    # for &imgsize
  71 use File::Basename;     # &basename
  72 use Carp qw(cluck confess);
  73 use URI::Escape;
  74 require HTTP::BrowserDetect;
  75 require HTTP::Negotiate;
  76 my $have_Geo_IP; BEGIN { $have_Geo_IP=eval { require Geo::IP; 1; }; }
  77 use ModPerl::Util qw(exit);
  78
  79
  80 #our $W;
  81                 # $W->{"title"}
  82                 # $W->{"head"}
  83                 # $W->{"head_css"}
  84                 # $W->{"force_charset"}
  85                 # $W->{"heading_done"}
  86                 # $W->{"footer_passed"}
  87                 # %{$W->{"headers"}}
  88                 # %{$W->{"headers_lc"}} # maps lc($headers_key)=>$headers_key
  89                 # @{$W->{"packages_used"}{$W->{"__PACKAGE__"}}}
  90                 # @{$W->{"packages_used"}{"__My::Web"}}
  91                 # %{$W->{"args"}}
  92
  93 sub init ($%)
  94 {
  95 my($class,%args)=@_;
  96
  97         print STDERR "$class->init ".Apache->request()->unparsed_uri()."\n";
  98
  99         my $packages_used_save=$W->{"packages_used"};
 100         $W={ %WebConfig,%args };        # override %WebConfig settings
 101         $W->{"packages_used"}=$packages_used_save;
 102
 103         # {"__PACKAGE__"} is mandatory for mod_perl-2.0;
 104         # $Apache::Registry::curstash is no longer supported.
 105         do { cluck "No $_" if !$W->{$_}; } for "__PACKAGE__";
 106
 107         $W->{"top_dir"}||=eval '$'.$W->{"__PACKAGE__"}.'::top_dir';
 108
 109         do { $W->{$_}=0  if !defined $W->{$_}; } for ("detect_ent");
 110         do { $W->{$_}=0  if !defined $W->{$_}; } for ("detect_js");
 111         do { $W->{$_}=1  if !defined $W->{$_}; } for ("have_css");      # AFAIK it does not hurt anyone.
 112         do { $W->{$_}=1  if !defined $W->{$_}; } for ("heading");
 113         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer");
 114         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_delimit");
 115         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_mailme");
 116         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_ids");
 117         do { $W->{$_}=1  if !defined $W->{$_}; } for ("indexme");
 118         do { $W->{$_}="" if !defined $W->{$_}; } for ("head");
 119         do { $W->{$_}="" if !defined $W->{$_}; } for ("head_css");
 120
 121         my $footer_any=0;
 122         for (qw(footer_mailme footer_ids)) {
 123                 $W->{$_}=0 if !$W->{"footer"};
 124                 $footer_any=1 if $W->{$_};
 125                 }
 126         $W->{"footer"}=0 if !$footer_any;
 127         $W->{"footer_delimit"}=0 if !$W->{"footer"};
 128
 129         $W->{"r"}=Apache->request();
 130
 131         $W->{"QUERY_STRING"}=$W->{"r"}->args() || "";
 132            if ($W->{"QUERY_STRING"}=~/[&]amp;have_ent/)
 133                 { $W->{"have_ent"}=0; }
 134         elsif ($W->{"QUERY_STRING"}=~    /[&]have_ent/)
 135                 { $W->{"have_ent"}=1; }
 136         else
 137                 { delete $W->{"have_ent"}; }
 138         if ($W->{"detect_ent"} && !defined $W->{"have_ent"} && $W->{"r"}->method() eq "GET") {
 139                 $W->{"head"}.='<meta http-equiv="Refresh" content="0; URL='
 140                                 .CGI::escapeHTML("http://".&{$W->{"web_hostname_sub"}}()."/".($W->{"r"}->uri()=~m#^/*(.*)$#)[0]
 141                                                 ."?".($W->{"QUERY_STRING"} || "detect_ent_glue=1").'&have_ent=detect')
 142                                 .'" />'."\n";
 143                 }
 144         $W->{"QUERY_STRING"}=~s/([&])amp;/$1/g;
 145         $W->{"r"}->args($W->{"QUERY_STRING"});
 146         # Do not: $W->{"r"}->args()
 147         # as it parses only QUERY_STRING (not POST data).
 148         $W->{"args"}={ CGI->new($W->{"r"})->Vars() };
 149         for (keys(%{$W->{"args"}})) {
 150                 my @vals=split /\x00/,$W->{"args"}{$_};
 151                 next if @vals<=1;
 152                 $W->{"args"}{$_}=[@vals];
 153                 }
 154
 155         do { $W->{$_}=$W->{"r"}->headers_in()->{"Accept"}     if !defined $W->{$_}; } for ("accept");
 156         do { $W->{$_}=$W->{"r"}->headers_in()->{"User-Agent"} if !defined $W->{$_}; } for ("user_agent");
 157
 158         $W->{"browser"}=HTTP::BrowserDetect->new($W->{"user_agent"});
 159
 160         if (!defined $W->{"have_style"}) {
 161                 $W->{"have_style"}=(!$W->{"browser"}->netscape() || ($W->{"browser"}->major() && $W->{"browser"}->major()>4) ? 1 : 0);
 162                 }
 163
 164         $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
 165         if ($W->{"detect_js"} && !$W->{"have_js"}) {
 166                 $W->{"head"}.='<script type="text/javascript" src="'.top_dir('/have_js.js.pl').'"></script>'."\n";
 167                 }
 168
 169         do { args_check(%$_) if $_; } for ($W->{"args_check"});
 170
 171         $ENV{"HOSTNAME"}||=&{$W->{"web_hostname_sub"}}();
 172
 173         return $W;
 174 }
 175
 176 sub Wprint($)
 177 {
 178 my($text)=@_;
 179
 180         $W->{"r"}->print($text);
 181 }
 182
 183 sub top_dir_disk ()
 184 {
 185         do { return $_ if $_; } for ($W->{"top_dir"});
 186         return $INC[0]; # fallback
 187 }
 188
 189 sub top_dir (;$)
 190 {
 191 my($in)=@_;
 192
 193         if (my $uri=$W->{"r"}->unparsed_uri()) {
 194                 if ($W->{"args"}{"Wabs"}) {
 195                         # FIXME: $in may not be defined here!
 196                         # to prevent: Use of uninitialized value in ...
 197                         if ($in=~m#^/#) {
 198                                 $in=~s#^/*##;
 199                                 }
 200                         else {
 201                                 $in=$uri."/".$in;
 202                                 $in=~tr#/#/#s;
 203                                 1 while $in=~s#/(?:[^/]+)/\Q..\E/#/#g
 204                                 }
 205                         return "http://".&{$W->{"web_hostname_sub"}}()."/".(defined $in ? $in : "");
 206                         }
 207                 $uri.="Index" if $uri=~m#/$#;
 208                 if (defined $in) {
 209                         my($inpath,$inquery)=split /[?]/,$in,2;
 210                         $inpath=~tr///cs;
 211                         $uri=~tr///cs;
 212                         for (;;) {
 213                                 my($in1 ,$in2 )=($in =~m#^(/[^/]+)(/.*)$#);
 214                                 my($uri1,$uri2)=($uri=~m#^(/[^/]+)(/.*)$#);
 215                                 last if !defined $in1 || !defined $uri1 || $in1 ne $uri1;
 216                                 $in=$in2;
 217                                 $uri=$uri2;
 218                                 }
 219                         }
 220                 $uri=~s#^/*##;
 221                 $uri=~s#[^/]+#..#g;
 222                 $uri=File::Basename::dirname($uri);
 223                 my $r=$uri.(defined $in ? $in : "");
 224 #               1 while $r=~s#^[.]/##;
 225 #               $r="./$r" if $r=~m#^(?:?.*)$#;  # empty pathname?
 226                 return $r;
 227                 }
 228         return top_dir_disk().$in;
 229 }
 230
 231 sub fatal (;$);
 232
 233 sub args_check (%)
 234 {
 235 my(%tmpl)=@_;
 236
 237         while (my($name,$regex)=each(%tmpl)) {
 238                 my $name_html="Parameter <span class=\"quote\">".CGI::escapeHTML($name)."</span>";
 239                 $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
 240                 $W->{"args"}{$name}=[ $W->{"args"}{$name} ] if !ref $W->{"args"}{$name} && ref $regex;
 241                 fatal "$name_html passed as multivar although singlevar expected"
 242                                 if ref $W->{"args"}{$name} && !ref $regex;
 243                 $regex=$regex->[0] if ref $regex;
 244                 for my $val (!ref $W->{"args"}{$name} ? $W->{"args"}{$name} : @{$W->{"args"}{$name}}) {
 245                         $val="" if !defined $val;
 246                         fatal "$name_html <span class=\"quote\">".CGI::escapeHTML($val)."</span>"
 247                                                         ." does not match the required regex <span class=\"quote\">".CGI::escapeHTML($regex)."</span> "
 248                                         if $regex ne "" && $val!~/$regex/;
 249                         }
 250                 }
 251 }
 252
 253 sub vskip (;$)
 254 {
 255 my($height)=@_;
 256
 257         return '<p'.(!defined $height ? "" : ' style="height: '.$height.';"').'>&nbsp;</p>'."\n";
 258 }
 259
 260 sub fatal (;$)
 261 {
 262 my($msg)=@_;
 263
 264         $msg="UNKNOWN" if !$msg;
 265
 266         $W->{"indexme"}=0;      # For the case no heading was sent yet.
 267         My::Web->heading();
 268         Wprint "\n".vskip("3ex")."<hr /><h1 class=\"error\">FATAL ERROR: $msg!</h1>\n"
 269                         ."<p>You can report this problem's details to"
 270                         ." ".a_href("mailto:".$W->{"admin_mail"},"admin of this website").".</p>\n";
 271         footer();
 272 }
 273
 274 sub footer (;$)
 275 {
 276         exit 1 if $W->{"footer_passed"}++;      # deadlock prevention:
 277
 278         Wprint vskip if $W->{"footer_delimit"};
 279
 280         if ($W->{"heading"}) {
 281                 do { &{$_}() if $_; } for ($W->{"footing_delimit"});
 282                 }
 283
 284         Wprint "<hr />\n" if $W->{"footer"};
 285
 286         if ($W->{"footer_mailme"}) {
 287                 Wprint '<form action="'.top_dir('/SendMsg.pl').'" method="post" onsubmit="'
 288                                 ."this.elements['msgscript'].value=this.elements['msghtml'].value;"
 289                                 ."this.elements['msghtml'].value='';"
 290                                 ."this.submit();"
 291                                 .'">'."\n";
 292                         Wprint '<p align="right">'."\n";
 293                                 Wprint '<input name="msgscript" type="hidden" />'."\n";
 294                                 Wprint '<input name="msghtml" type="text" size="32" alt="Message" />'."\n";
 295                                 Wprint '<input name="submit" type="submit" value="Quick Note" />'."\n";
 296                         Wprint '</p>'."\n";
 297                 Wprint '</form>'."\n";
 298                 }
 299
 300         my @packages_used=(
 301                         $W->{"__PACKAGE__"},
 302                         __PACKAGE__,
 303                         @{$W->{"packages_used"}{"__My::Web"}},
 304                         map((!$_ ? () : @$_),$W->{"packages_used"}{$W->{"__PACKAGE__"}}),
 305                         );
 306         my %packages_used;
 307         @packages_used=grep((!$packages_used{$_}++),@packages_used);
 308         if ($W->{"footer_ids"}) {
 309                 Wprint '<p class="cvs-id">';
 310                 Wprint join("<br />\n",map({ my $package=$_;
 311                         my $cvs_id=(eval('$'.$package."::CVS_ID")
 312 #                                       || $package     # debug
 313                                         );
 314                         if (!$cvs_id) {
 315                                 ();
 316                                 }
 317                         else {
 318                                 $cvs_id='$'.$cvs_id.'$';        # Eaten by 'q' operator.
 319                                 my @cvs_id_split=split / +/,$cvs_id;
 320                                 if (@cvs_id_split==8) {
 321                                         my $file=$package;
 322                                         $file=~s#::#/#g;
 323                                         my $ext;
 324                                         my @tried;
 325                                         for (qw(.html.pl .pl .pm),"") {
 326                                                 $ext=$_;
 327                                                 my $pathname=top_dir_disk()."/$file$ext";
 328                                                 push @tried,$pathname;
 329                                                 last if -r $pathname;
 330                                                 cluck "Class file $file not found; tried: ".join(" ",@tried) if !$ext;
 331                                                 }
 332                                         $file.=$ext;
 333                                         $cvs_id_split[2]=""
 334                                                         .a_href((map({ my $s=$_; $s=~s#/viewcvs/#$&~checkout~/#; $s; } $W->{"viewcvs"}))[0]."$file?rev=".$cvs_id_split[2],
 335                                                                         $cvs_id_split[2]);
 336                                         $cvs_id_split[1]=a_href($W->{"viewcvs"}.$file,
 337                                                         ($package!~/^Apache::/ ? $package : $cvs_id_split[1]));
 338                                         $cvs_id_split[5]=&{$W->{"cvs_id_author"}}($cvs_id_split[5]);
 339                                         }
 340                                 join " ",@cvs_id_split;
 341                                 }
 342                         } @packages_used));
 343                 Wprint "</p>\n";
 344                 }
 345
 346         for my $package (@packages_used) {
 347                 my $cvs_id=(eval('$'.$package."::CVS_ID")
 348 #                               || $package     # debug
 349                                 );
 350                 Wprint '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
 351                 }
 352
 353         if ($W->{"heading"}) {
 354                 do { &{$_}() if $_; } for ($W->{"footing"});
 355                 }
 356
 357         Wprint "</body></html>\n";
 358         exit(0);
 359 }
 360
 361 sub header (%)
 362 {
 363 my(%pairs)=@_;
 364
 365         while (my($key,$val)=each(%pairs)) {
 366                 do { cluck "Headers already sent"; next; } if $W->{"heading_done"};
 367                 for ($W->{"headers_lc"}{lc $key} || ()) {
 368                         delete $W->{"headers"}{$_};
 369                         }
 370                 $W->{"headers_lc"}{lc $key}=$key;
 371                 $W->{"headers"}{$key}=$val;
 372                 }
 373 }
 374
 375 sub size_display ($)
 376 {
 377 my($size)=@_;
 378
 379            if ($size<4096)
 380                 {}
 381         elsif ($size<1024*1024)
 382                 { $size=sprintf "%.1fK",$size/1024; }
 383         else
 384                 { $size=sprintf "%.1fM",$size/1024/1024; }
 385         $size.="B";
 386         return $size;
 387 }
 388
 389 sub url_is_local ($)
 390 {
 391 my($url)=@_;
 392
 393         return $url!~m#^[a-z]+://#;
 394 }
 395
 396 sub a_href ($;$%)
 397 {
 398 my($url,$contents,%args)=@_;
 399
 400         do { $$_=1 if !defined $$_; } for (\$args{"size"});
 401         if (!defined $contents) {
 402                 $contents=$url;
 403                 $contents=File::Basename::basename($contents) if $args{"basename"};
 404                 $contents=CGI::escapeHTML($contents);
 405                 }
 406         $contents=~s#<a\b[^>]*>##gi;
 407         $contents=~s#</a>##gi;
 408
 409         $url=top_dir($url) if url_is_local $url && $url=~m#^/#;
 410
 411         my $r='<a href="';
 412         my $urlent=CGI::escapeHTML($url);
 413            if ($url eq $urlent)
 414                 { $r.=$url; }
 415         elsif (url_is_local $url)
 416                 { $r.=$urlent; }
 417         elsif (defined $W->{"have_ent"} && !$W->{"have_ent"})   # non-ent client
 418                 { $r.=$url; }
 419         elsif ($W->{"have_ent"})        # ent client
 420                 { $r.=$urlent; }
 421         else    # unknown client, &CGI::escapeHTML should not be needed here
 422                 { $r.=CGI::escapeHTML(top_dir('/Redirect.pl?location='.uri_escape($url))); }
 423         $r.='"';
 424         do { $r.=" $_" if $_; } for ($args{"attr"});
 425         $r.='>'.$contents.'</a>';
 426         if ($args{"size"} && url_is_local($url) && ($args{"size"}>=2 || $url=~/[.](?:gz|Z|rpm|zip|deb|lha)/)) { # Downloadable?
 427                 $url=top_dir_disk().$url if $url=~m#^/#;
 428                 if (!-r $url)
 429                         { cluck "File not readable: $url"; }
 430                 else {
 431                         $r.='&nbsp;('.size_display((stat($url))[7]).')';
 432                         }
 433                 }
 434         return $r;
 435 }
 436
 437 sub remote_ip ()
 438 {
 439         # Do not: PerlModule                 Apache::ForwardedFor
 440         #         PerlPostReadRequestHandler Apache::ForwardedFor
 441         # As 'Apache::ForwardedFor' takes the first of $ENV{"HTTP_X_FORWARDED_FOR"}
 442         # while the contents is '127.0.0.1, 213.220.195.171' if client has its own proxy.
 443         # We must take the last item ourselves.
 444         my $r=$W->{"r"}->headers_in()->{"X-Forwarded-For"} || $W->{"r"}->get_remote_host();
 445         $r=~s/^.*,\s*//;
 446         return $r;
 447 }
 448
 449 sub is_cz ()
 450 {
 451         return 0 if !$have_Geo_IP;
 452         return "CZ" eq Geo::IP->new()->country_code_by_addr(remote_ip());
 453 }
 454
 455 sub a_href_cz ($$;%)
 456 {
 457 my($url,$contents,%args)=@_;
 458
 459         return a_href $url,$contents,%args if is_cz();
 460         return $contents;
 461 }
 462
 463 sub make ($)
 464 {
 465 my($cmd)=@_;
 466
 467         system {'flock'} 'flock','-x',top_dir_disk(),$cmd.' >&2';
 468 }
 469
 470 sub img_size ($$)
 471 {
 472 my($width,$height)=@_;
 473
 474         return ($W->{"have_style"} ? "style=\"border:0;width:${width}px;height:${height}px\"" : "border=\"0\"")
 475                         ." width=\"$width\" height=\"$height\"";
 476 }
 477
 478 sub negotiate_variant (%)
 479 {
 480 my(%args)=@_;
 481
 482         my @fields=("id","qs","content-type","encoding","charset","lang","size");
 483         return [ map(($args{$_}),@fields) ];
 484 }
 485
 486 my @img_variants=(
 487                 { "id"=>"png","qs"=>1.0,"content-type"=>"image/png" },
 488                 { "id"=>"gif","qs"=>0.9,"content-type"=>"image/gif" },
 489                 );
 490 my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
 491
 492 sub img_src ($)
 493 {
 494 my($file_base)=@_;
 495
 496         if (!url_is_local($file_base)) {
 497                 return $file_base if !wantarray();
 498                 return ($file_base,$file_base);
 499                 }
 500         # Known image extension?
 501         if ($file_base=~m#$img_variants_re#o) {
 502                 return $file_base if !wantarray();
 503                 return ($file_base,$file_base) if $file_base!~m#^/#;
 504                 return (top_dir($file_base),top_dir_disk().$file_base);
 505                 }
 506
 507         my $file_base_disk;
 508         my $file_base_uri;
 509         if ($file_base!~m#^/#) {
 510                 $file_base_disk=$file_base_uri=$file_base;
 511                 }
 512         else {
 513                 $file_base_disk=top_dir_disk().$file_base;
 514                 $file_base_uri=top_dir($file_base);
 515                 }
 516
 517         my @nego_variants;
 518         for my $var (@img_variants) {
 519                 my $file=$file_base_disk.".".$var->{"id"};
 520                 # TODO: Somehow quickly check dependencies?
 521                 make('make -s --no-print-directory'
 522                                                 .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'")
 523                                 if !-f $file;
 524                 push @nego_variants,negotiate_variant(
 525                                 %$var,
 526                                 "size"=>(stat $file)[7],
 527                                 );
 528                 }
 529         # Do not: ,$W->{"r"});
 530         # but should we provide somehow either 'HTTP::Headers' or 'HTTP::Request' ?
 531         my $ext=HTTP::Negotiate::choose(\@nego_variants);
 532         $ext||=$img_variants[0]->{"id"};        # &HTTP::Negotiate::choose failed?
 533
 534         return $file_base_uri.".".$ext if !wantarray();
 535         return ($file_base_uri.".".$ext,$file_base_disk.".".$ext);
 536 }
 537
 538 sub img ($$;%)
 539 {
 540 my($file_base,$alt,%attr)=@_;
 541
 542         my($file_uri,$file_disk)=img_src $file_base;
 543         my($width,$height)=Image::Size::imgsize($file_disk);
 544         $alt=~s/<[^>]*>//g;
 545         $alt=CGI::escapeHTML($alt);
 546         my $content="<img src=\"$file_uri\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
 547                         .(!$attr{"attr"} ? "" : " ".$attr{"attr"})." />";
 548         return a_href img_src($attr{"a_href_img"}),$content if $attr{"a_href_img"};
 549         return a_href $attr{"a_href"},$content if $attr{"a_href"};
 550         return $content;
 551 }
 552
 553 sub centerimg
 554 {
 555         my $r.="";
 556         $r.='<table border="0" width="100%"><tr>'."\n";
 557         @_=( [@_] ) if !ref $_[0];
 558         for (@_) {
 559                 $r.="\t".'<td align="center">'.&{\&img}(@$_).'</td>'."\n";
 560                 }
 561         $r.='</tr></table>'."\n";
 562         return $r;
 563 }
 564
 565 sub rightimg
 566 {
 567 my($text,@args_img)=@_;
 568
 569         # Workaround bug of 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)':
 570         return <<"HERE";
 571 <table border="0" width="100%">
 572         <col width="@{[ (!$W->{"browser"}->ie() ? "1*" : "90%" ) ]}" />
 573         <col width="@{[ (!$W->{"browser"}->ie() ? "0*" : "10%" ) ]}" />
 574         <tr>
 575                 <td align="left">
 576                         @{[ $text ]}
 577                 </td>
 578                 <td align="right">
 579                         @{[ &{\&img}(@args_img) ]}
 580                 </td>
 581         </tr>
 582 </table>
 583 HERE
 584 }
 585
 586 sub readfile ($$)
 587 {
 588 my($class,$filename)=@_;
 589
 590         local *F;
 591         open F,$filename or die "Cannot open \"$filename\": $!";
 592         local $/=undef();
 593         my $data=<F>;
 594         close F;
 595         return $data;
 596 }
 597
 598 sub arr_keys (@)
 599 {
 600 my(@arr)=@_;
 601
 602         my @r=();
 603         while (@arr) {
 604                 push @r,shift @arr;     # key
 605                 shift @arr;     # val
 606                 }
 607         return @r;
 608 }
 609
 610 sub heading ()
 611 {
 612 my($class)=@_;
 613
 614         return if $W->{"heading_passed"}++;
 615
 616         # $ENV{"CLIENT_CHARSET"} ignored (mod_czech support dropped!)
 617         my $client_charset=$W->{"force_charset"} || "us-ascii";
 618         header("Content-Style-Type"=>"text/css");
 619         header("Content-Script-Type"=>"text/javascript");
 620
 621         while (my($key,$val)=each(%{$W->{"headers"}})) {
 622                 $W->{"r"}->header_out($key,$val);
 623                 }
 624         $W->{"r"}->send_http_header("text/html; charset=$client_charset");      # "Content-type"; do not use header()
 625
 626         return if $W->{"heading_done"}++;
 627         exit if $W->{"r"}->header_only();
 628
 629         if (1) { # || !$msie_major || $msie_major>=4) # TODO:dyn
 630                 Wprint '<?xml version="1.0" encoding="'.$client_charset.'"?>'."\n";
 631                 }
 632         Wprint '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'."\n";
 633         Wprint '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">'."\n";
 634         my $title=$W->{"title_prefix"}.join("",map({ ': '.$_; } ($W->{"title"} || ())));
 635         $title=~s#<[^>]*>##g;
 636         Wprint "<head>";
 637         Wprint "<title>$title</title>\n";
 638
 639         if ($W->{"have_css"}) {
 640                 Wprint <<'HERE';
 641 <style type="text/css"><!--
 642 .cvs-id   { font-family: monospace; }
 643 .error    { color: red;   background-color: transparent; }
 644 .quote    { font-family: monospace; }
 645 .nowrap   { white-space: nowrap; }
 646 .centered { text-align: center; }
 647 .tab-bold { font-weight: bold; }
 648 .tab-head { font-weight: bold; }
 649 /*
 650 .tab-head { font-weight: bold; color: yellow; background-color: transparent; }
 651 body {
 652                 background-color: black;
 653                 color: white;
 654                 }
 655 :link    { color: aqua;   background-color: transparent; }
 656 :visited { color: teal;   background-color: transparent; }
 657 h1,h2    { color: yellow; background-color: transparent; }
 658 */
 659 td       { padding: 2px; }
 660 caption  { caption-side: bottom; }
 661 .footer img { vertical-align: middle; }
 662 HERE
 663                 Wprint $W->{"head_css"}."\n";
 664                 Wprint "--></style>\n";
 665                 }
 666
 667         Wprint '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
 668         Wprint $W->{"head"};
 669         for my $type (qw(prev next index contents start up)) {
 670                 do { Wprint '<link rel="'.$type.'" href="'.$_.'" />'."\n" if $_; } for ($W->{"rel_$type"});
 671                 }
 672         Wprint "</head><body";
 673 #       Wprint ' bgcolor="black" text="white" link="aqua" vlink="teal"'
 674 #                       if $W->{"browser"}->netscape() && (!$W->{"browser"}->major() || $W->{"browser"}->major()<=4);
 675         do { &{$_}($W) if $_; } for $W->{"body_attr_sub"};
 676         Wprint ">\n";
 677
 678         if ($W->{"heading"}) {
 679                 do { &{$_}() if $_; } for ($W->{"heading"});
 680                 }
 681 }
 682
 683 BEGIN {
 684         delete $W->{"__My::Web_init"};
 685         }
 686
 687 1;