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) = $path =~ m,^(?:(.*)/)?(?:([^/]*)\.)?([^./]*)$,;
73 if (defined $base) { $ext = ".$ext"; }
74 else { $base = $ext; $ext = ""; }
75 return ($dir, $base, $ext);
81 $u =~ s:([^0-9a-zA-Z_./~-]):sprintf "%%%02x", ord $1:eg;
88 $u =~ s:\%([0-9a-fA-F]{2}):chr hex $1:eg;
92 ###--------------------------------------------------------------------------
97 package TrivGal::ImageType {
100 return $TYPE{$ext} = bless { ext => $ext }, $cls;
103 my ($me, @args) = @_;
107 my ($me, @args) = @_;
108 return TrivGal::read_or_set $me, $me->{mimetype}, @args;
111 my ($me, @args) = @_;
112 return TrivGal::read_or_set $me, $me->{imlibfmt}, @args;
116 TrivGal::ImageType->new(".jpg")->mimetype("image/jpeg")->imlibfmt("jpeg");
117 TrivGal::ImageType->new(".png")->mimetype("image/png")->imlibfmt("png");
119 ###--------------------------------------------------------------------------
122 export qw{$SCOPE $SUFFIX};
123 our $SCOPE //= $::SCOPE;
124 our $SUFFIX //= $::SUFFIX;
126 export qw{$IMGROOT $CACHE $TMP};
127 our $IMGROOT //= "$ENV{HOME}/publish/$SCOPE-html$SUFFIX/tgal-images";
129 ($ENV{XDG_CACHE_HOME} // "$ENV{HOME}/.cache") .
130 "/tgal/$SCOPE$SUFFIX";
131 our $TMP //= "$CACHE/tmp";
133 export qw{$ROOTURL $IMGURL $CACHEURL $STATICURL $SCRIPTURL};
134 my $user = getpwuid($>)->name;
135 our $ROOTURL //= "/~$user";
136 our $IMGURL //= "$ROOTURL/tgal-images";
137 our $CACHEURL //= "$ROOTURL/tgal-cache";
138 our $STATICURL //= "$ROOTURL/tgal-static";
142 our $SRCURL = "https://git.distorted.org.uk/~mdw/tgal/";
145 our %SIZE = (smallthumb => 96,
153 my $m = HTML::Mason::Request->instance;
154 my $r = $m->cgi_request;
156 $m->interp->set_escape(u => sub { my ($r) = @_; $$r = urlencode $$r; });
158 return unless !$initp;
160 $SCRIPTURL //= $r->subprocess_env("SCRIPT_NAME");
164 ###--------------------------------------------------------------------------
167 export qw{clean_temp_files};
168 sub clean_temp_files () {
171 eval { opendir $d, $TMP; };
173 if ($@->isa("autodie::exception") && $@->errno == ENOENT) { return; }
177 FILE: while (my $name = readdir $d) {
178 next FILE unless $name =~ /^t(\d+)\-/;
180 next FILE if kill 0, $pid;
181 my $f = "$TMP/$name";
183 next FILE if $now - $st->mtime() < 300;
189 ###--------------------------------------------------------------------------
202 package TrivGal::Image {
203 use File::Path qw{make_path};
207 my ($cls, $path) = @_;
208 my $imgpath = "$IMGROOT/$path";
209 my $st = stat $imgpath or die "no image `$path'";
218 my ($me, $scale) = @_;
220 my $path = $me->{path};
221 my $sz = $SIZE{$scale} or die "unknown scale `$scale'";
222 my $thumb = "$CACHE/scale.$sz/$path";
223 my $thumburl = "$CACHEURL/scale.$sz/$path";
224 my $st = stat $thumb;
225 if (defined $st && $st->mtime > $me->{mtime}) { return $thumburl; }
227 my ($dir, $base, $ext) = TrivGal::split_path $thumb;
228 my $ty = $TYPE{lc $ext} or die "unknown type `$ext'";
230 my $img = $me->{img};
231 unless (defined $img) {
232 my $imgpath = "$IMGROOT/$path";
233 my $exif = new Image::ExifTool;
234 $exif->ExtractInfo($imgpath);
235 my $orient = $exif->GetValue("Orientation", "ValueConv");
236 $img = $me->{img} = Image::Imlib2->load($imgpath);
237 if (defined $orient) {
238 my ($rot, $flip) = @{$ORIENT{$orient}};
239 if ($rot) { $img->image_orientate($rot); }
240 if ($flip) { $img->flip_horizontal(); }
244 my ($wd, $ht) = ($img->width, $img->height);
245 my $max = $wd > $ht ? $wd : $ht;
246 if ($max <= $sz) { return "$IMGURL/$path"; }
248 my $scaled = $img->create_scaled_image($sc*$wd, $sc*$ht);
250 $scaled->image_set_format($ty->imlibfmt);
251 $scaled->set_quality(90);
252 my $new = "$TMP/t${$}$ext";
261 ###--------------------------------------------------------------------------
262 ### Directory listings.
264 package TrivGal::Item {
266 my ($cls, $name) = @_;
267 return bless { name => $name }, $cls;
270 my ($me, @args) = @_;
271 return TrivGal::read_or_set $me, $me->{name}, @args;
274 my ($me, @args) = @_;
275 return TrivGal::read_or_set $me, $me->{comment}, @args;
285 if (-f "$path/.tgal.index") {
286 open my $f, "<", "$path/.tgal.index";
291 next LINE if /^\s*(\#|$)/;
293 die "no item" unless $item;
294 $comment = defined $comment ? $comment . "\n" . $_ : $_;
296 if ($item && $comment) { $item->comment($comment); }
297 my ($indexp, $name, $c) = /(!\s+)?(\S+)\s*(\S|\S.*\S)?\s*$/;
298 $name = urldecode $name;
300 if ($name =~ m!/$!) {
302 die "can't index a folder" if $indexp;
305 my ($dir, $base, $ext) = TrivGal::split_path $name;
306 die "unknown image type" unless $TYPE{lc $ext};
308 die "two index images" if defined $ix;
312 $item = TrivGal::Item->new($name);
317 if ($item && $comment) { $item->comment($comment); }
321 unless ($st->mode&0004) { return ([], [], undef); }
327 ENT: for my $e (sort @e) {
328 my ($dir, $base, $ext) = split_path $e;
329 my $dotp = $e =~ /^\./;
330 my $st = stat "$path/$e";
333 elsif (-d $st) { $list = \@d; }
334 elsif ($TYPE{lc $ext} && -f $st) { $list = \@f; }
335 $list and push @$list, TrivGal::Item->new($e);
340 return (\@d, \@f, $ix);
349 eval { open $f, "<", "$file"; };
351 if ($@->isa("autodie::exception") && $@->errno == ENOENT)
355 while (sysread $f, $buf, 16384) { $contents .= $buf; }
360 export qw{find_covering_file};
361 sub find_covering_file ($$$) {
362 my ($top, $path, $name) = @_;
364 my $stuff = contents "$top/$path/$name"; return $stuff if defined $stuff;
365 if ($path eq "") { return undef; }
366 if ($path =~ m!^(.*)/[^/]+/?!) { $path = $1; }
371 ###----- That's all, folks --------------------------------------------------