From bfb80ffa567c24ad151eaad7c0e813eb1f6cbe76 Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Fri, 6 Mar 2015 07:07:06 +0100
Subject: [PATCH] font: navigation links to offset character table

---
 font.plp | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/font.plp b/font.plp
index e0a9663..2af6133 100644
--- a/font.plp
+++ b/font.plp
@@ -17,6 +17,8 @@ if (my $font = $ENV{PATH_INFO} =~ s{^/}{}r) {
 	$fontmeta or die "Unknown font $font\n";
 
 	my $offset = $get{q} || 0;
+	$offset < 0 and $offset = 0;
+	my $size = 0x200;
 
 	say "<h1>Font coverage</h1>";
 	say "<h2>$_</h2>" for EscapeHTML($fontmeta->{name});
@@ -47,7 +49,19 @@ if (my $font = $ENV{PATH_INFO} =~ s{^/}{}r) {
 </style>
 EOT
 	say '<table class="glyphs big">';
-	for my $cp ($offset .. $offset+0x1FF) {
+	say "<caption>$_</caption>" for join(' ', grep {$_}
+		$offset > $size && sprintf('<a rel="start" href="?q=%d">◄</a>', 0),
+		$offset > 0 && sprintf(
+			'<a rel="prev" href="?q=%d" title="U+%1$04X">◅</a>',
+			$offset - $size,
+		),
+		sprintf('U+%04X', $offset), #TODO: block name
+		$offset + $size < 0x11_0000 && sprintf(
+			'<a rel="next" href="?q=%d" title="U+%1$04X">▻</a>',
+			$offset + $size,
+		),
+	);
+	for my $cp ($offset .. $offset+$size-1) {
 		my $info = $glyphs->glyph_info($cp);
 		my ($class, $name, $mnem, $html, $string) = @{$info};
 		my $np = $class =~ /\bC\S\b/;  # noprint if control or invalid
-- 
2.30.0