my $pages = $options->{pages } || 1 + int $#$self / $pagesize;
$pagesize = @$self / $pages;
- my $offset = 0;
- my @links;
+ my $offset = $pagesize;
+ my @links = ('');
while ($offset < @$self) {
my $link = substr $self->[$offset], 0, $length;
if ($context) {
- my $trim = 1;
- my $before = $offset > $context ? $self->[$offset - $context] : '';
- for my $match (split //, $before) {
- scalar $link =~ /\G\Q$match/g or last;
- $trim++;
+ {
+ # take a value slightly before the current offset
+ my $before = $offset > $context ? $self->[$offset - $context] : '.';
+ # see how much of it matches the current link
+ my $trim = 1;
+ for my $match (split //, $before) {
+ scalar $link =~ /\G\Q$match/g or last;
+ $trim++;
+ }
+ # truncate link upto where the earlier value starts to differ
+ substr($link, $trim) = '' unless $trim > length $link;
+ }
+
+ if ($offset + $context < $#$self) {
+ # take a value after the current offset
+ my $after = $self->[$offset + $context];
+ # see how much of it matches the current link
+ my $trim = 1;
+ for my $match (split //, $after) {
+ scalar $link =~ /\G\Q$match/g or last;
+ $trim++;
+ }
+ # use this link if it's shorter
+ if ($trim < length $link) {
+ $link = substr $after, 0, $trim;
+ }
}
- substr($link, $trim) = '' unless $trim > length $link;
}
- push @links, [$link];
+ push @links, $link;
$offset += $pagesize;
}
+ use List::MoreUtils 'uniq';
+ @links = map { [$_] } uniq @links;
for my $i (0 .. $#links - 1) {
my ($link, $lastchar) = $links[$i + 1]->[0] =~ /(.*)(.)/;
- $link .= $lastchar eq '.' ? 'z' : chr( ord($lastchar) - 1 )
- unless $lastchar eq 'a';
+ $link .= $lastchar le 'a' ? '.' : chr( ord($lastchar) - 1 );
+ next if $link eq $links[$i]->[0] and $i;
$links[$i]->[1] = $link;
}
$links[-1]->[1] = '';
my @allow;
if (length $s1) {
+ if (length $s2) {
+ $s1 le $s2 or $s1 =~ /^\Q$s2/ or return undef;
+ }
+
my $prefix = '';
my $char;
for my $i (0 .. length($s1) - 1) {
if (length $s1 > $i) {
my $c1 = substr $s1, $i, 1;
if ($s1 =~ /^\Q$prefix/) {
- next if $c1 eq $char;
+ next if $c1 le $char;
}
}
push @allow, $prefix."(?![$char-$last])"