+# assumes that $from and $to are defined and correctly filled,
+# and that $line holds a line of chunk header for unified diff
+sub format_unidiff_chunk_header {
+ my ($line, $from, $to) = @_;
+
+ my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
+ $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
+
+ $from_lines = 0 unless defined $from_lines;
+ $to_lines = 0 unless defined $to_lines;
+
+ if ($from->{'href'}) {
+ $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
+ -class=>"list"}, $from_text);
+ }
+ if ($to->{'href'}) {
+ $to_text = $cgi->a({-href=>"$to->{'href'}#l$to_start",
+ -class=>"list"}, $to_text);
+ }
+ $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
+ "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
+ return $line;
+}
+
+# assumes that $from and $to are defined and correctly filled,
+# and that $line holds a line of chunk header for combined diff
+sub format_cc_diff_chunk_header {
+ my ($line, $from, $to) = @_;
+
+ my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
+ my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
+
+ @from_text = split(' ', $ranges);
+ for (my $i = 0; $i < @from_text; ++$i) {
+ ($from_start[$i], $from_nlines[$i]) =
+ (split(',', substr($from_text[$i], 1)), 0);
+ }
+
+ $to_text = pop @from_text;
+ $to_start = pop @from_start;
+ $to_nlines = pop @from_nlines;
+
+ $line = "<span class=\"chunk_info\">$prefix ";
+ for (my $i = 0; $i < @from_text; ++$i) {
+ if ($from->{'href'}[$i]) {
+ $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
+ -class=>"list"}, $from_text[$i]);
+ } else {
+ $line .= $from_text[$i];
+ }
+ $line .= " ";
+ }
+ if ($to->{'href'}) {
+ $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
+ -class=>"list"}, $to_text);
+ } else {
+ $line .= $to_text;
+ }
+ $line .= " $prefix</span>" .
+ "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
+ return $line;
+}
+