[PATCH] view: simplify topic handling based on subjects

[Eric Wong <e@80x24.org>]

Dropping "[FOO]" prefixes for the purposes of summarization
is tricky and we end up with odd display behavior.
Just show Subject line changes as the writer intended
(with the exception of normalization to strip the "Re: ")
---
 lib/PublicInbox/View.pm | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 70b92a7..fc877b7 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -867,27 +867,21 @@ sub add_topic {
 
 	if (my $x = $node->message) {
 		$x = $x->header_obj;
-		my ($topic, $subj);
+		my $subj;
 
 		$subj = $x->header('Subject');
 		$subj = $state->{srch}->subject_normalized($subj);
-		$topic = $subj;
 
-		# kill "[PATCH v2]" etc. for summarization
-		unless ($level == 0) {
-			$topic =~ s/\A\s*\[[^\]]+\]\s*//g;
-		}
-
-		if (++$state->{subjs}->{$topic} == 1) {
-			push @{$state->{order}}, [ $level, $subj, $topic ];
+		if (++$state->{subjs}->{$subj} == 1) {
+			push @{$state->{order}}, [ $level, $subj ];
 		}
 
 		my $mid = mid_clean($x->header('Message-ID'));
 
 		my $ts = $x->header('X-PI-TS');
-		my $exist = $state->{latest}->{$topic};
+		my $exist = $state->{latest}->{$subj};
 		if (!$exist || $exist->[1] < $ts) {
-			$state->{latest}->{$topic} = [ $mid, $ts ];
+			$state->{latest}->{$subj} = [ $mid, $ts ];
 		}
 	} else {
 		# ghost message, do not bump level
@@ -909,9 +903,9 @@ sub dump_topics {
 	my $prev = 0;
 	my $prev_attr = '';
 	while (defined(my $info = shift @$order)) {
-		my ($level, $subj, $topic) = @$info;
-		my $n = delete $subjs->{$topic};
-		my ($mid, $ts) = @{delete $latest->{$topic}};
+		my ($level, $subj) = @$info;
+		my $n = delete $subjs->{$subj};
+		my ($mid, $ts) = @{delete $latest->{$subj}};
 		$mid = PublicInbox::Hval->new_msgid($mid)->as_href;
 		$subj = PublicInbox::Hval->new($subj)->as_html;
 		$pfx = indent_for($level);
-- 
EW