* Add an img plugin, based on Christian Mock's img plugin, but stripped

  down to the bare essentials. Useful for handling large images on websites.

1 files changed, 85 insertions, 0 deletions

diff --git a/IkiWiki/Plugin/img.pm b/IkiWiki/Plugin/img.pm
new file mode 100644
index 000000000..bde5a3e1a
--- /dev/null
+++ b/IkiWiki/Plugin/img.pm
@@ -0,0 +1,85 @@
+#!/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;
+use Image::Magick;
+
+my $convert = 'convert';
+
+my %imgdefaults;
+
+sub import { #{{{
+	hook(type => "preprocess", id => "img", call => \&preprocess);
+} #}}}
+
+sub preprocess (@) { #{{{
+	my ($image) = $_[0] =~ /$config{wiki_file_regexp}/; # untaint
+	my %params=@_;
+
+	if (! exists $imgdefaults{$params{page}}) {
+		$imgdefaults{$params{page}} = {};
+	}
+	my $size = $params{size} || $imgdefaults{$params{page}}->{size} || 'full';
+	my $alt = $params{alt} || $imgdefaults{$params{page}}->{alt} || '';
+
+	if ($image eq 'defaults') {
+		$imgdefaults{$params{page}} = {
+			size => $size,
+			alt => $alt,
+		};
+		return '';
+	}
+
+	my $file = bestlink($params{page}, $image) || return "[[img $image not found]]";
+	add_depends($params{page}, $file);
+
+	my $dir = IkiWiki::dirname($file);
+	my $base = IkiWiki::basename($file);
+	my $im = Image::Magick->new;
+	my $imglink;
+	my $r;
+
+	if ($size ne 'full') {
+		my ($w, $h) = ($size =~ /^(\d+)x(\d+)$/);
+		return "[[img bad size \"$size\"]]" unless (defined $w && defined $h);
+
+		my $outfile = "$config{destdir}/$dir/${w}x${h}-$base";
+		$imglink = "$dir/${w}x${h}-$base";
+		will_render($params{page}, $imglink);
+
+		if (-e $outfile && (-M srcfile($file) >= -M $outfile)) {
+			$r = $im->Read($outfile);
+			return "[[img failed to read $outfile: $r]]" if $r;
+		}
+		else {
+			$r = $im->Read(srcfile($file));
+			return "[[img failed to read $file: $r]]" if $r;
+
+			$r = $im->Resize(geometry => "${w}x${h}");
+			return "[[img failed to resize: $r]]" if $r;
+
+			my @blob = $im->ImageToBlob();
+			writefile($imglink, $config{destdir}, $blob[0], 1);
+		}
+	}
+	else {
+		$r = $im->Read(srcfile($file));
+		return "[[img failed to read $file: $r]]" if $r;
+		$imglink = $file;
+	}
+
+	add_depends($imglink, $params{page});
+
+	return '<a href="'.
+		IkiWiki::abs2rel($file, IkiWiki::dirname($params{destpage})).
+		'"><img src="'.
+		IkiWiki::abs2rel($imglink, IkiWiki::dirname($params{destpage})).
+		'" alt="'.$alt.'" width="'.$im->Get("width").
+		'" height="'.$im->Get("height").'" /></a>';
+} #}}}
+
+1;