- # leading output
- $header{content_type} = "text/html; charset=$meta->{charset}";
- say '<!DOCTYPE html>';
- say '<html lang="en">';
- say '';
- say '<head>';
- say sprintf '<meta http-equiv="content-type" content="%s">', $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(', ', @{ $meta->{keywords} }) || ();
- say '<meta name="viewport" content="width=device-width, initial-scale=1">';
- say '<link rel="icon" type="image/png" href="/clip.png">';
- say for stylesheet($meta->{stylesheet});
- say for map { @{$_} } $meta->{raw} || ();
- say '<meta name="robots" content="noindex">' if $Dev;
- 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;
+ $meta->{canonical} //= "/$file" . ($Request ne '' && "/$Request");
+ if (my $url = $meta->{canonical}) {
+ $url = "https://sheet.shiar.nl$url";
+ push @{ $meta->{raw} }, qq(<link rel="canonical" href="$url" />);
+ }
+
+ 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 src="/prefer.js"></script>';
+ 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;
+ };