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