+sub checkmodified {
+ my $lastmod;
+ for (@_) {
+ my $mod = stat $_ or next;
+ $mod = $mod->mtime or next;
+ $lastmod = $mod if $mod gt $lastmod;
+ }
+
+ for ($ENV{HTTP_IF_MODIFIED_SINCE} || ()) {
+ next if str2time($_) < $lastmod;
+ $header{status} = '304 Same old';
+ exit;
+ }
+
+ $header{'Last-Modified'} = time2str($lastmod);
+}
+
+sub Html {
+ my ($meta) = @_;
+
+ # announce and check data modification
+ checkmodified(
+ $ENV{SCRIPT_FILENAME},
+ (grep { /\bShiar_/ } values %INC),
+ $meta->{data} ? @{ $meta->{data} } : (),
+ );
+ $header{'Cache-Control'} = sprintf 'max-age: ', 24*60*60;
+
+ # default fallbacks
+ $meta->{stylesheet} ||= [qw'light dark circus mono red terse'];
+ $meta->{charset} ||= 'utf-8';
+
+ # optional amends
+ push @{ $meta->{raw} }, (
+ '<!--[if lte IE 6]><style> .help dl.legend dt {margin:0 0 1px} </style><![endif]-->',
+ '<!--[if lte IE 7]><style> .help dl.legend dd {float:none} </style><![endif]-->',
+ !$showkeys ? '<style type="text/css"> .no {visibility:hidden} </style>'
+ : $showkeys eq 'ghost' ? '<style type="text/css"> .no, .alias {opacity:.5} </style>'
+ : (),
+ '<script type="text/javascript" src="/keys.js?1.6"></script>',
+ ) if $meta->{keys};
+
+ # flatten arrays
+ ref $_ eq 'ARRAY' and $_ = join ' ', @$_ for $meta->{description};
+ ref $_ eq 'ARRAY' and $_ = join ', ', @$_ for $meta->{keywords};
+ ref $_ eq 'ARRAY' and $_ = join "\n", @$_ for $meta->{raw};
+ ref $_ eq 'ARRAY' and $_ = stylesheet(@$_)."\n" for $meta->{stylesheet};
+
+ # other vars
+ my ($file) = $ENV{SCRIPT_FILENAME} =~ m{ ([^/]+) \.plp$ }x;
+
+ # leading output
+ $header{content_type} = "text/html; charset=$meta->{charset}";
+ print <<"EOT";
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+ "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+
+<head>
+<meta http-equiv="content-type" content="$header{content_type}">
+<title>$meta->{title}</title>
+<meta name="description" content="$meta->{description}">
+<meta name="keywords" content="$meta->{keywords}">
+<link rel="icon" type="image/png" href="/clip.png">
+EOT
+ print $_, "\n" for $meta->{stylesheet} || ();
+ print $_, "\n" for $meta->{raw} || ();
+ print qq{</head>\n\n<body id="$file">\n};
+
+ # prepare trailing output
+ PLP_END {
+ print <<"EOT";
+<p class="footer">
+ <a href="/" rel="start">sheet.shiar.nl</a>/$file.<a href="/source/$file.plp"
+ rel="code" title="Written in Perl">plp</a>
+ <a href="http://git.shiar.nl/sheet.git/history/HEAD:/$file.plp"
+ rel="vcs-git" title="Git repository">$meta->{version}</a>
+ created by <a href="http://shiar.nl/" rel="author">Shiar</a> •
+ <a href="http://www.fsf.org/licensing/licenses/agpl-3.0.html" rel="copyright"
+ title="Licensed under the GNU Affero General Public License, version 3">AGPLv3</a>
+</p>
+
+</html>
+EOT
+ };
+}
+