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};
33 use Image::ExifTool qw{};
39 sub export (@) { push @EXPORT, @_; }
41 ###--------------------------------------------------------------------------
42 ### Internal utilities.
44 sub read_or_set ($\$@) {
45 my ($me, $ref, @args) = @_;
46 if (@args == 0) { return $$ref; }
47 elsif (@args == 1) { $$ref = $args[0]; return $me; }
48 elsif (@args > 1) { die "too many arguments"; }
51 ###--------------------------------------------------------------------------
54 export qw{join_paths};
60 $e =~ s#([^/])/+$#$1#;
61 if ($e eq "") { next ELT; }
62 elsif ($p eq "" || $e =~ m#^/#) { $p = $e; }
63 else { $p = "$p/$e"; }
68 export qw{split_path};
72 my ($dir, $base, $ext) =
73 $path =~ m#^ (?: (.*) /)?
76 if (defined $base) { $ext = ".$ext"; }
77 else { $base = $ext; $ext = ""; }
78 return ($dir, $base, $ext);
84 $u =~ s#([^0-9a-zA-Z_./~-])#sprintf "%%%02x", ord $1#eg;
91 $u =~ s#\%([0-9a-fA-F]{2})#chr hex $1#eg;
95 ###--------------------------------------------------------------------------
100 package TrivGal::ImageType {
102 my ($cls, $ext) = @_;
103 return $TYPE{$ext} = bless { ext => $ext }, $cls;
106 my ($me, @args) = @_;
110 my ($me, @args) = @_;
111 return TrivGal::read_or_set $me, $me->{mimetype}, @args;
114 my ($me, @args) = @_;
115 return TrivGal::read_or_set $me, $me->{imlibfmt}, @args;
119 TrivGal::ImageType->new(".jpg")->mimetype("image/jpeg")->imlibfmt("jpeg");
120 TrivGal::ImageType->new(".png")->mimetype("image/png")->imlibfmt("png");
122 ###--------------------------------------------------------------------------
125 export qw{$SCOPE $SUFFIX};
126 our $SCOPE //= $::SCOPE;
127 our $SUFFIX //= $::SUFFIX;
129 export qw{$IMGROOT $CACHE $TMP};
130 our $IMGROOT //= "$ENV{HOME}/publish/$SCOPE-html$SUFFIX/tgal-images";
132 ($ENV{XDG_CACHE_HOME} // "$ENV{HOME}/.cache") .
133 "/tgal/$SCOPE$SUFFIX";
134 our $TMP //= "$CACHE/tmp";
136 export qw{$ROOTURL $IMGURL $CACHEURL $STATICURL $SCRIPTURL};
137 my $user = getpwuid($>)->name;
138 our $ROOTURL //= "/~$user";
139 our $IMGURL //= "$ROOTURL/tgal-images";
140 our $CACHEURL //= "$ROOTURL/tgal-cache";
141 our $STATICURL //= "$ROOTURL/tgal-static";
145 our $SRCURL = "https://git.distorted.org.uk/~mdw/tgal/";
148 our %SIZE = (smallthumb => 96,
158 my $m = HTML::Mason::Request->instance;
159 my $r = $m->cgi_request;
161 $m->interp->set_escape(u => sub { my ($r) = @_; $$r = urlencode $$r; });
163 return unless !$initp;
165 $SCRIPTURL //= $r->subprocess_env("SCRIPT_NAME");
169 ###--------------------------------------------------------------------------
172 export qw{clean_temp_files};
173 sub clean_temp_files () {
176 eval { opendir $d, $TMP; };
178 if ($@->isa("autodie::exception") && $@->errno == ENOENT) { return; }
182 FILE: while (my $name = readdir $d) {
183 next FILE unless $name =~ /^t(\d+)\-/;
185 next FILE if kill 0, $pid;
186 my $f = "$TMP/$name";
188 next FILE if $now - $st->mtime() < 300;
194 ###--------------------------------------------------------------------------
207 package TrivGal::Image {
208 use File::Path qw{make_path};
212 my ($cls, $path) = @_;
213 my $imgpath = "$IMGROOT/$path";
214 my $st = stat $imgpath or die "no image `$path'";
223 my ($me, $scale, $forcep) = @_;
224 my $m = HTML::Mason::Request->instance;
226 my $path = $me->{path};
227 my $sz = $SIZE{$scale} or die "unknown scale `$scale'";
228 my $thumb = "$CACHE/scale.$sz/$path";
230 $m->interp->apply_escapes("$CACHEURL/scale.$sz/$path", "u");
231 my $st = stat $thumb;
232 if (defined $st && $st->mtime > $me->{mtime}) { return $thumburl; }
234 $m->interp->apply_escapes("$SCRIPTURL/$path", "u") . "?scale=$scale"
237 my ($dir, $base, $ext) = TrivGal::split_path $thumb;
238 my $ty = $TYPE{lc $ext} or die "unknown type `$ext'";
240 my $img = $me->{img};
241 unless (defined $img) {
242 my $imgpath = "$IMGROOT/$path";
243 my $exif = new Image::ExifTool;
244 $exif->ExtractInfo($imgpath);
245 my $orient = $exif->GetValue("Orientation", "ValueConv");
246 $img = $me->{img} = Image::Imlib2->load($imgpath);
247 if (defined $orient) {
248 my ($rot, $flip) = @{$ORIENT{$orient}};
249 if ($rot) { $img->image_orientate($rot); }
250 if ($flip) { $img->flip_horizontal(); }
254 my ($wd, $ht) = ($img->width, $img->height);
255 my $max = $wd > $ht ? $wd : $ht;
256 if ($max <= $sz) { return "$IMGURL/$path"; }
258 my $scaled = $img->create_scaled_image($sc*$wd, $sc*$ht);
260 $scaled->image_set_format($ty->imlibfmt);
261 $scaled->set_quality(90);
262 my $new = "$TMP/t$$-$ext";
271 ###--------------------------------------------------------------------------
272 ### Directory listings.
274 package TrivGal::Item {
276 my ($cls, $name) = @_;
277 return bless { name => $name }, $cls;
280 my ($me, @args) = @_;
281 return TrivGal::read_or_set $me, $me->{name}, @args;
284 my ($me, @args) = @_;
285 return TrivGal::read_or_set $me, $me->{comment}, @args;
296 if (-f "$path/.tgal.index") {
297 open my $f, "<", "$path/.tgal.index";
302 next LINE if /^\s*(\#|$)/;
304 die "no item" unless $item;
305 $comment = defined $comment ? $comment . "\n" . $_ : $_;
307 if ($item && $comment) { $item->comment($comment); }
308 my ($flags, $name, $c) =
309 /^ (?: ([-!]+) \s+)? # flags
311 (\S | \S.*\S )? # start of the comment
314 my $indexp = $flags =~ /!/;
315 my $hidep = $flags =~ /-/;
316 $name = urldecode $name;
318 $item = TrivGal::Item->new($name);
319 if ($name =~ m#/$#) {
321 die "can't index a folder" if $indexp;
324 my ($dir, $base, $ext) = split_path $name;
325 die "unknown image type" unless $TYPE{lc $ext};
327 die "two index images" if defined $ix;
332 push @$list, $item unless $hidep;
335 if ($item && $comment) { $item->comment($comment); }
339 unless ($st->mode&0004) { return ([], [], undef); }
345 ENT: for my $e (sort @e) {
346 my ($dir, $base, $ext) = split_path $e;
347 my $dotp = $e =~ /^\./;
348 my $st = stat "$path/$e";
351 elsif (-d $st) { $list = \@d; $e .= "/"; }
352 elsif ($TYPE{lc $ext} && -f $st) { $list = \@f; }
353 $list and push @$list, TrivGal::Item->new($e);
358 return (\@d, \@f, $ix);
367 eval { open $f, "<", "$file"; };
369 if ($@->isa("autodie::exception") && $@->errno == ENOENT)
373 while (sysread $f, $buf, 16384) { $contents .= $buf; }
378 export qw{find_covering_file};
379 sub find_covering_file ($$$) {
380 my ($top, $path, $name) = @_;
382 my $stuff = contents "$top/$path/$name"; return $stuff if defined $stuff;
383 if ($path eq "") { return undef; }
384 if ($path =~ m#^(.*)/[^/]+/?#) { $path = $1; }
389 ###----- That's all, folks --------------------------------------------------