# '<span class="mark">foo</span>bar'
sub esc_html_hl_regions {
my ($str, $css_class, @sel) = @_;
- return esc_html($str) unless @sel;
+ my %opts = grep { ref($_) ne 'ARRAY' } @sel;
+ @sel = grep { ref($_) eq 'ARRAY' } @sel;
+ return esc_html($str, %opts) unless @sel;
my $out = '';
my $pos = 0;
for my $s (@sel) {
- $out .= esc_html(substr($str, $pos, $s->[0] - $pos))
- if ($s->[0] - $pos > 0);
- $out .= $cgi->span({-class => $css_class},
- esc_html(substr($str, $s->[0], $s->[1] - $s->[0])));
+ my ($begin, $end) = @$s;
- $pos = $s->[1];
+ # Don't create empty <span> elements.
+ next if $end <= $begin;
+
+ my $escaped = esc_html(substr($str, $begin, $end - $begin),
+ %opts);
+
+ $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
+ if ($begin - $pos > 0);
+ $out .= $cgi->span({-class => $css_class}, $escaped);
+
+ $pos = $end;
}
- $out .= esc_html(substr($str, $pos))
+ $out .= esc_html(substr($str, $pos), %opts)
if ($pos < length($str));
return $out;