IkiWiki/Plugin/img.pm

   1 #!/usr/bin/perl
   2 # Ikiwiki enhanced image handling plugin
   3 # Christian Mock cm@tahina.priv.at 20061002
   4 package IkiWiki::Plugin::img;
   5
   6 use warnings;
   7 use strict;
   8 use IkiWiki;
   9 use Image::Magick;
  10
  11 my $convert = 'convert';
  12
  13 my %imgdefaults;
  14
  15 sub import { #{{{
  16         hook(type => "preprocess", id => "img", call => \&preprocess);
  17 } #}}}
  18
  19 sub preprocess (@) { #{{{
  20         my ($image) = $_[0] =~ /$config{wiki_file_regexp}/; # untaint
  21         my %params=@_;
  22
  23         if (! exists $imgdefaults{$params{page}}) {
  24                 $imgdefaults{$params{page}} = {};
  25         }
  26         my $size = $params{size} || $imgdefaults{$params{page}}->{size} || 'full';
  27         my $alt = $params{alt} || $imgdefaults{$params{page}}->{alt} || '';
  28
  29         if ($image eq 'defaults') {
  30                 $imgdefaults{$params{page}} = {
  31                         size => $size,
  32                         alt => $alt,
  33                 };
  34                 return '';
  35         }
  36
  37         add_depends($params{page}, $image);
  38         my $file = bestlink($params{page}, $image) || return "[[img $image not found]]";
  39
  40         my $dir = IkiWiki::dirname($file);
  41         my $base = IkiWiki::basename($file);
  42         my $im = Image::Magick->new;
  43         my $imglink;
  44         my $r;
  45
  46         if ($size ne 'full') {
  47                 my ($w, $h) = ($size =~ /^(\d+)x(\d+)$/);
  48                 return "[[img bad size \"$size\"]]" unless (defined $w && defined $h);
  49
  50                 my $outfile = "$config{destdir}/$dir/${w}x${h}-$base";
  51                 $imglink = "$dir/${w}x${h}-$base";
  52                 will_render($params{page}, $imglink);
  53
  54                 if (-e $outfile && (-M srcfile($file) >= -M $outfile)) {
  55                         $r = $im->Read($outfile);
  56                         return "[[img failed to read $outfile: $r]]" if $r;
  57                 }
  58                 else {
  59                         $r = $im->Read(srcfile($file));
  60                         return "[[img failed to read $file: $r]]" if $r;
  61
  62                         $r = $im->Resize(geometry => "${w}x${h}");
  63                         return "[[img failed to resize: $r]]" if $r;
  64
  65                         my @blob = $im->ImageToBlob();
  66                         writefile($imglink, $config{destdir}, $blob[0], 1);
  67                 }
  68         }
  69         else {
  70                 $r = $im->Read(srcfile($file));
  71                 return "[[img failed to read $file: $r]]" if $r;
  72                 $imglink = $file;
  73         }
  74
  75         add_depends($imglink, $params{page});
  76
  77         return '<a href="'.
  78                 IkiWiki::abs2rel($file, IkiWiki::dirname($params{destpage})).
  79                 '"><img src="'.
  80                 IkiWiki::abs2rel($imglink, IkiWiki::dirname($params{destpage})).
  81                 '" alt="'.$alt.'" width="'.$im->Get("width").
  82                 '" height="'.$im->Get("height").'" /></a>';
  83 } #}}}
  84
  85 1;