1 # Copyright (C) 2014, Eric Wong <normalperson@yhbt.net> and all contributors
2 # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
3 package PublicInbox::View;
6 use URI::Escape qw/uri_escape/;
7 use CGI qw/escapeHTML/;
8 use Encode qw/find_encoding/;
9 use Encode::MIME::Header;
10 use Email::MIME::ContentType qw/parse_content_type/;
11 use constant MAX_INLINE_QUOTED => 5;
13 my $enc_utf8 = find_encoding('utf8');
14 my $enc_ascii = find_encoding('us-ascii');
15 my $enc_mime = find_encoding('MIME-Header');
19 my ($class, $mime, $full_pfx) = @_;
21 headers_to_html_header($mime) .
22 multipart_text_as_html($mime, $full_pfx) .
23 '</pre></body></html>';
27 my ($class, $mime, $full_pfx) = @_;
29 "<pre>" . multipart_text_as_html($mime, $full_pfx) . "</pre>";
33 # only private functions below.
37 defined $ct or return $enc_utf8;
38 my $ct_parsed = parse_content_type($ct);
40 if (my $charset = $ct_parsed->{attributes}->{charset}) {
41 my $enc = find_encoding($charset);
48 sub multipart_text_as_html {
49 my ($mime, $full_pfx) = @_;
52 my $enc_msg = enc_for($mime->header("Content-Type"));
54 # scan through all parts, looking for displayable text
55 $mime->walk_parts(sub {
57 return if $part->subparts; # walk_parts already recurses
58 my $enc = enc_for($part->content_type) || $enc_msg || $enc_utf8;
61 my $fn = $part->filename;
62 defined($fn) or $fn = "part #" . ($part_nr + 1);
63 $rv .= add_filename_line($enc->decode($fn));
66 if (defined $full_pfx) {
67 $rv .= add_text_body_short($enc, $part, $part_nr,
70 $rv .= add_text_body_full($enc, $part, $part_nr);
72 $rv .= "\n" unless $rv =~ /\n\z/s;
78 sub add_filename_line {
84 $pad x= ($len/2) if ($len > 0);
85 "$pad " . ascii_html($fn) . " $pad\n";
88 sub add_text_body_short {
89 my ($enc, $part, $part_nr, $full_pfx) = @_;
91 my $s = ascii_html($enc->decode($part->body));
92 $s =~ s!^((?:(?:>[^\n]*)\n)+)!
94 my @lines = split(/\n/, $cur);
95 if (@lines > MAX_INLINE_QUOTED) {
96 # show a short snippet of quoted text
97 $cur = join(' ', @lines);
100 my @sum = split(/\s+/, $cur);
103 $cur .= shift(@sum) . ' ';
104 } while (@sum && length($cur) < 64);
106 "> <<a href=\"${full_pfx}#q${part_nr}_" . $n++ .
107 "\">$cur<\/a>>\n";
115 sub add_text_body_full {
116 my ($enc, $part, $part_nr) = @_;
118 my $s = ascii_html($enc->decode($part->body));
119 $s =~ s!^((?:(?:>[^\n]*)\n)+)!
121 my @lines = split(/\n/, $cur);
122 if (@lines > MAX_INLINE_QUOTED) {
123 "<a name=q${part_nr}_" . $n++ . ">$cur</a>";
131 sub trim_message_id {
133 $mid = $enc_mime->decode($mid);
136 my $html = ascii_html($mid);
137 my $href = ascii_html(uri_escape($mid));
143 $enc_ascii->encode(escapeHTML($_[0]), Encode::HTMLCREF);
146 sub headers_to_html_header {
151 foreach my $h (qw(From To Cc Subject Date)) {
152 my $v = $simple->header($h);
156 my $raw = $enc_mime->decode($v);
157 $v = ascii_html($raw);
161 my @from = Email::Address->parse($raw);
162 $raw = $from[0]->name;
163 unless (defined($raw) && length($raw)) {
164 $raw = '<' . $from[0]->address . '>';
166 $title[1] = ascii_html($raw);
168 } elsif ($h eq 'Subject') {
173 my $mid = $simple->header('Message-ID');
175 my ($html, $href) = trim_message_id($mid);
176 $rv .= "Message-ID: <<a href=\"$href.html\">$html</a>> ";
177 $rv .= "(<a href=\"$href.txt\">original</a>)\n";
180 my $irp = $simple->header('In-Reply-To');
182 my ($html, $href) = trim_message_id($irp);
183 $rv .= "In-Reply-To: <";
184 $rv .= "<a href=\"$href.html\">$html</a>>\n";
188 ("<html><head><title>". join(' - ', @title) .
189 '</title></head><body><pre style="white-space:pre-wrap">' . $rv);