3 ### Main output for Trivial Gallery.
5 ### (c) 2021 Mark Wooding
8 ###----- Licensing notice ---------------------------------------------------
10 ### This file is part of Trivial Gallery.
12 ### Trivial Gallery is free software: you can redistribute it and/or modify
13 ### it under the terms of the GNU Affero General Public License as
14 ### published by the Free Software Foundation; either version 3 of the
15 ### License, or (at your option) any later version.
17 ### Trivial Gallery is distributed in the hope that it will be useful, but
18 ### WITHOUT ANY WARRANTY; without even the implied warranty of
19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 ### Affero General Public License for more details.
22 ### You should have received a copy of the GNU Affero General Public
23 ### License along with Trivial Gallery. If not, see
24 ### <https://www.gnu.org/licenses/>.
31 use Exporter qw{import};
34 use Image::ExifTool qw{};
40 sub export (@) { push @EXPORT, @_; }
42 ###--------------------------------------------------------------------------
43 ### Internal utilities.
45 sub read_or_set ($\$@) {
46 my ($me, $ref, @args) = @_;
47 if (@args == 0) { return $$ref; }
48 elsif (@args == 1) { $$ref = $args[0]; return $me; }
49 elsif (@args > 1) { die "too many arguments"; }
52 ###--------------------------------------------------------------------------
55 export qw{join_paths};
61 $e =~ s#([^/])/+$#$1#;
62 if ($e eq "") { next ELT; }
63 elsif ($p eq "" || $e =~ m#^/#) { $p = $e; }
64 else { $p = "$p/$e"; }
69 export qw{split_path};
73 my ($dir, $base, $ext) =
74 $path =~ m#^ (?: (.*) /)?
77 if (defined $base) { $ext = ".$ext"; }
78 else { $base = $ext; $ext = ""; }
79 return ($dir, $base, $ext);
85 $u =~ s#([^0-9a-zA-Z_./~-])#sprintf "%%%02x", ord $1#eg;
92 $u =~ s#\%([0-9a-fA-F]{2})#chr hex $1#eg;
96 ###--------------------------------------------------------------------------
99 export qw{$SCOPE $SUFFIX};
100 our $SCOPE //= $::SCOPE;
101 our $SUFFIX //= $::SUFFIX;
103 export qw{$IMGROOT $CACHE $TMP};
104 our $IMGROOT //= "$ENV{HOME}/publish/$SCOPE-html$SUFFIX/tgal-images";
106 ($ENV{XDG_CACHE_HOME} // "$ENV{HOME}/.cache") .
107 "/tgal/$SCOPE$SUFFIX";
108 our $TMP //= "$CACHE/tmp";
110 export qw{$ROOTURL $IMGURL $CACHEURL $STATICURL $SCRIPTURL};
111 my $user = getpwuid($>)->name;
112 our $ROOTURL //= "/~$user";
113 our $IMGURL //= "$ROOTURL/tgal-images";
114 our $CACHEURL //= "$ROOTURL/tgal-cache";
115 our $STATICURL //= "$ROOTURL/tgal-static";
119 our $SRCURL = "https://git.distorted.org.uk/~mdw/tgal/";
122 our %SIZE = (smallthumb => 96,
136 our %TYPE = map { $_ => 1 } qw{.jpg .png};
141 my $m = HTML::Mason::Request->instance;
142 my $r = $m->cgi_request;
144 $m->interp->set_escape(u => sub { my ($r) = @_; $$r = urlencode $$r; });
146 return unless !$initp;
148 $SCRIPTURL //= $r->subprocess_env("SCRIPT_NAME");
152 ###--------------------------------------------------------------------------
155 export qw{clean_temp_files};
156 sub clean_temp_files () {
159 eval { opendir $d, $TMP; };
161 if ($@->isa("autodie::exception") && $@->errno == ENOENT) { return; }
165 FILE: while (my $name = readdir $d) {
166 next FILE unless $name =~ /^t(\d+)\-/;
168 next FILE if kill 0, $pid;
169 my $f = "$TMP/$name";
171 next FILE if $now - $st->mtime() < 300;
177 ###--------------------------------------------------------------------------
190 package TrivGal::Image {
191 use File::Path qw{make_path};
195 my ($cls, $path) = @_;
196 my $imgpath = "$IMGROOT/$path";
197 my $st = stat $imgpath or die "no image `$path'";
199 path => $path, imgpath => $imgpath,
202 rot => undef, flip => undef,
203 wd => undef, ht => undef,
204 _wd => undef, _ht => undef,
211 return if defined $me->{_wd};
213 my ($wd, $ht, $err) = Image::Size::imgsize $me->{imgpath};
214 defined $wd or die "failed to read size of `$me->{path}': $err";
215 my $sz = $wd; if ($sz < $ht) { $sz = $ht; }
216 @$me{"_wd", "_ht", "sz"} = ($wd, $ht, $sz);
221 return if defined $me->{wd};
224 my $exif = new Image::ExifTool; $exif->ExtractInfo($me->{imgpath});
225 my $orient = $exif->GetValue("Orientation", "ValueConv");
226 my ($wd, $ht) = @$me{"_wd", "_ht"};
228 if (defined $orient) { ($rot, $flip) = $ORIENT{$orient}->@*; }
229 else { ($rot, $flip) = (0, 0); }
230 if ($rot%2) { ($wd, $ht) = ($ht, $wd); }
231 @$me{"rot", "flip", "wd", "ht"} = ($rot, $flip, $wd, $ht);
234 sub sz ($) { my ($me) = @_; $me->_getsz; return $me->{sz}; }
235 sub wd ($) { my ($me) = @_; $me->_getexif; return $me->{wd}; }
236 sub ht ($) { my ($me) = @_; $me->_getexif; return $me->{ht}; }
240 "$rc" and die "failed to hack `$me->{img}': $rc";
244 my ($me, $scale, $forcep) = @_;
245 my $m = HTML::Mason::Request->instance;
247 my $path = $me->{path};
248 my $sz = $SIZE{$scale} or die "unknown scale `$scale'";
252 { $url = $m->interp->apply_escapes("$IMGURL/$path", "u"); }
254 my $tail = "scale.$sz/$path";
255 my $thumb = "$CACHE/$tail";
256 my $thumburl = $m->interp->apply_escapes("$CACHEURL/$tail", "u");
258 my $st = stat $thumb;
259 if ($st && $st->mtime > $me->{mtime})
260 { $url = $thumburl; }
263 $m->interp->apply_escapes("$SCRIPTURL/$path", "u") .
266 my $img = $me->{img};
267 unless (defined $img) {
268 $img = $me->{img} = Graphics::Magick->new;
269 _check_gm $img->Read($me->{imgpath});
272 my ($dir, undef, $ext) = TrivGal::split_path $thumb;
274 my $new = "$TMP/t$$-thumb$ext";
275 _check_gm $img->Resize(geometry => $sz);
276 make_path $TMP, { mode => 0771 };
277 _check_gm $img->Write($new);
278 make_path $dir, { mode => 0771 };
288 ###--------------------------------------------------------------------------
289 ### Directory listings.
291 package TrivGal::Item {
293 my ($cls, $name) = @_;
294 return bless { name => $name }, $cls;
297 my ($me, @args) = @_;
298 return TrivGal::read_or_set $me, $me->{name}, @args;
301 my ($me, @args) = @_;
302 return TrivGal::read_or_set $me, $me->{comment}, @args;
313 if (-f "$path/.tgal.index") {
314 open my $f, "<", "$path/.tgal.index";
319 next LINE if /^\s*(\#|$)/;
321 die "no item" unless $item;
322 $comment = defined $comment ? $comment . "\n" . $_ : $_;
324 if ($item && $comment) { $item->comment($comment); }
325 my ($flags, $name, $c) =
326 /^ (?: ([-!]+) \s+)? # flags
328 (\S | \S.*\S )? # start of the comment
331 my $indexp = $flags =~ /!/;
332 my $hidep = $flags =~ /-/;
333 $name = urldecode $name;
335 $item = TrivGal::Item->new($name);
336 if ($name =~ m#/$#) {
338 die "can't index a folder" if $indexp;
341 my (undef, undef, $ext) = split_path $name;
342 die "unknown image type" unless $TYPE{lc $ext};
344 die "two index images" if defined $ix;
349 push @$list, $item unless $hidep;
352 if ($item && $comment) { $item->comment($comment); }
356 unless ($st->mode&0004) { return ([], [], undef); }
362 ENT: for my $e (sort @e) {
363 my (undef, undef, $ext) = split_path $e;
364 my $dotp = $e =~ /^\./;
365 my $st = stat "$path/$e";
368 elsif (-d $st) { $list = \@d; $e .= "/"; }
369 elsif ($TYPE{lc $ext} && -f $st) { $list = \@f; }
370 $list and push @$list, TrivGal::Item->new($e);
375 return (\@d, \@f, $ix);
384 eval { open $f, "<", "$file"; };
386 if ($@->isa("autodie::exception") && $@->errno == ENOENT)
390 while (sysread $f, $buf, 16384) { $contents .= $buf; }
395 export qw{find_covering_file};
396 sub find_covering_file ($$$) {
397 my ($top, $path, $name) = @_;
399 my $stuff = contents "$top/$path/$name"; return $stuff if defined $stuff;
400 if ($path eq "") { return undef; }
401 if ($path =~ m#^(.*)/[^/]+/?#) { $path = $1; }
406 ###----- That's all, folks --------------------------------------------------