font: describe search query

diff --git a/font.plp b/font.plp
index ddc35b4d5a8153770493ad535fc5af8fadd151f2..4cc99c9deee7ca639302c82ec96ddf91dcf9c59c 100644 (file)
--- a/font.plp
+++ b/font.plp
@@ -52,12 +52,14 @@ for my $os (@ossel) {
 # parse input
 
 my @chars;
+my @querydesc;
 
 my $query = $ENV{PATH_INFO} || $get{q} || 'ipa';
 for ($query) {
        s{^/}{};
        when (qr{^[a-z]+(?:/|\z)}) {
                for (split / /) {
+                       push @querydesc, "preset group $_";
                        my ($tablegroup, $tablename) = split m{/}, $_, 2;
                        my @tables = $tablename ? $tables->{$tablegroup}->{$tablename}
                                   : sort values %{ $tables->{$tablegroup} };
@@ -73,12 +75,14 @@ for ($query) {
                }
        }
        when (qr{[\d,;\s+-]+}) {
+               push @querydesc, "character codepoints $_";
                for (map { split /[^\d-]/ } $_) {
                        my ($charnum, $range) = split /-/, $_;
                        push @chars, chr $_ for $charnum .. ($range // $charnum);
                }
        }
        when (qr{[A-Z]}) {
+               push @querydesc, "unicode match $_";
                eval {
                        my $match = qr/\A\p{$_}\z/;
                        push @chars, grep { m/$match/ } map { chr $_ }
@@ -90,12 +94,15 @@ for ($query) {
        }
 }
 
-@chars <= 1500
-       or die sprintf 'too many matches (%d)'."\n", scalar @chars;
+@chars <= 1500 or die sprintf(
+       'too many matches (%d) for %s'."\n",
+       scalar @chars, join(', ', @querydesc),
+);
 
 # output character list
 
 print '<table class=mapped>';
+say '<caption>'.EscapeHTML(join ', ', @querydesc).'</caption>';
 print '<col>' x 3;
 print "<colgroup span=$_>" for 2, map { scalar @{$oslist{$_}} } @ossel;