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#!/usr/bin/perl
# Ikiwiki enhanced image handling plugin
# Christian Mock cm@tahina.priv.at 20061002
package IkiWiki::Plugin::img;
use warnings;
use strict;
use IkiWiki 3.00;
my %imgdefaults;
sub import {
hook(type => "getsetup", id => "img", call => \&getsetup);
hook(type => "preprocess", id => "img", call => \&preprocess, scan => 1);
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => undef,
},
}
sub preprocess (@) {
my ($image) = $_[0] =~ /$config{wiki_file_regexp}/; # untaint
my %params=@_;
if (exists $imgdefaults{$params{page}}) {
foreach my $key (keys %{$imgdefaults{$params{page}}}) {
if (! exists $params{$key}) {
$params{$key}=$imgdefaults{$params{page}}->{$key};
}
}
}
if (! exists $params{size}) {
$params{size}='full';
}
if ($image eq 'defaults') {
$imgdefaults{$params{page}} = \%params;
return '';
}
push @{$links{$params{page}}}, $image;
# optimisation: detect scan mode, and avoid generating the image
if (! defined wantarray) {
return;
}
my $file = bestlink($params{page}, $image);
my $srcfile = srcfile($file, 1);
if (! length $file || ! defined $srcfile) {
return htmllink($params{page}, $params{destpage}, $image);
}
my $dir = $params{page};
my $base = IkiWiki::basename($file);
eval q{use Image::Magick};
error gettext("Image::Magick is not installed") if $@;
my $im = Image::Magick->new;
my $imglink;
my $r;
if ($params{size} ne 'full') {
my ($w, $h) = ($params{size} =~ /^(\d*)x(\d*)$/);
error sprintf(gettext('bad size "%s"'), $params{size})
unless (defined $w && defined $h &&
(length $w || length $h));
my $outfile = "$config{destdir}/$dir/${w}x${h}-$base";
$imglink = "$dir/${w}x${h}-$base";
will_render($params{page}, $imglink);
if (-e $outfile && (-M $srcfile >= -M $outfile)) {
$r = $im->Read($outfile);
error sprintf(gettext("failed to read %s: %s"), $outfile, $r) if $r;
}
else {
$r = $im->Read($srcfile);
error sprintf(gettext("failed to read %s: %s"), $file, $r) if $r;
$r = $im->Resize(geometry => "${w}x${h}");
error sprintf(gettext("failed to resize: %s"), $r) if $r;
# don't actually write file in preview mode
if (! $params{preview}) {
my @blob = $im->ImageToBlob();
writefile($imglink, $config{destdir}, $blob[0], 1);
}
else {
$imglink = $file;
}
}
}
else {
$r = $im->Read($srcfile);
error sprintf(gettext("failed to read %s: %s"), $file, $r) if $r;
$imglink = $file;
}
add_depends($imglink, $params{page});
my ($fileurl, $imgurl);
if (! $params{preview}) {
$fileurl=urlto($file, $params{destpage});
$imgurl=urlto($imglink, $params{destpage});
}
else {
$fileurl="$config{url}/$file";
$imgurl="$config{url}/$imglink";
}
if (! defined($im->Get("width")) || ! defined($im->Get("height"))) {
error sprintf(gettext("failed to determine size of image %s"), $file)
}
my $imgtag='<img src="'.$imgurl.
'" width="'.$im->Get("width").
'" height="'.$im->Get("height").'"'.
(exists $params{alt} ? '" alt="'.$params{alt}.'"' : '').
(exists $params{title} ? ' title="'.$params{title}.'"' : '').
(exists $params{class} ? ' class="'.$params{class}.'"' : '').
(exists $params{id} ? ' id="'.$params{id}.'"' : '').
' />';
if (! defined $params{link} || lc($params{link}) eq 'yes') {
$imgtag='<a href="'.$fileurl.'">'.$imgtag.'</a>';
}
elsif ($params{link} =~ /^\w+:\/\//) {
$imgtag='<a href="'.$params{link}.'">'.$imgtag.'</a>';
}
elsif (length bestlink($params{page}, $params{link})) {
add_depends($params{page}, $params{link});
$imgtag=htmllink($params{page}, $params{destpage},
$params{link}, linktext => $imgtag,
noimageinline => 1);
}
if (exists $params{caption}) {
return '<table class="img">'.
'<caption>'.$params{caption}.'</caption>'.
'<tr><td>'.$imgtag.'</td></tr>'.
'</table>';
}
else {
return $imgtag;
}
}
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