+ PLP_START {
+ # leading output
+ say '<!DOCTYPE html>';
+ my $rootattr = '';
+ $rootattr .= qq( class="s-$_") for $meta->{stylesheet} || ();
+ say qq(<html lang="$meta->{lang}"$rootattr>);
+ say '';
+ say '<head>';
+ say sprintf '<meta http-equiv="content-type" content="%s">', $_
+ for $header{content_type};
+ say sprintf '<title>%s</title>', $meta->{title};
+ say sprintf '<meta name="description" content="%s">', EscapeHTML($_)
+ for join(' ', @{ $meta->{description} // [] }) || ();
+ say sprintf '<meta name="keywords" content="%s">', EscapeHTML($_)
+ for join(', ', @{ $meta->{keywords} // [] }) || ();
+ say '<meta name="viewport" content="width=device-width, initial-scale=1">';
+ say '<link rel="icon" type="image/png" href="/clip.png">';
+ say for map { @{$_} } $meta->{raw} || ();
+ say '<meta name="robots" content="noindex">' if $Dev;
+ say "<script>$_</script>" for join($/,
+ "if (m = window.matchMedia('(monochrome)'))",
+ "(m.onchange = e => document.documentElement.classList.toggle('s-mono', e.matches))(m);",
+ );
+ say '</head>';
+ say '';
+ say sprintf '<body id="%s">', $file;
+
+ # development version indicator
+ printf '<p style="%s">beta</p>', join('; ',
+ 'position: fixed',
+ 'right: 1em',
+ 'opacity: .5',
+ 'border: 1ex solid red',
+ 'border-width: 1ex 0',
+ 'z-index: 1',
+ 'background: inherit',
+ ) if $Dev;
+ };
+
+ # prepare trailing output
+ PLP_END {
+ print <<"EOT";
+<p class="footer">
+ <a href="/" rel="start">sheet.shiar.nl</a>/$file.<a href="/source/$file.plp"
+ rel="source" title="Written in Perl">plp</a>
+ version <a href="http://git.shiar.nl/sheet.git/history/HEAD:/$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"
+ title="Licensed under the GNU Affero General Public License, version 3"
+ rel="license">AGPLv3</a>
+EOT
+ our $Time;
+ say sprintf '• %.3fs', Time::HiRes::tv_interval($Time) if $Dev and $Time;
+ say '</p>';
+ say '';
+ say '</html>';
+ };
+}
+
+BEGIN {
+ $PLP::ERROR = sub {
+ my ($message, $html) = @_;
+ if (ref $message) {
+ warn join ': ', @{$message};
+ $html = shift @{$message};
+ }
+ else {
+ warn $message;
+ $message = [];
+ }
+ unless ($PLP::sentheaders) {
+ Html({nocache => 1});
+ say '<h1>Page unavailable</h1>';
+ }
+ Alert("Fatal error: $html.", @{$message});
+ };
+}