* 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.

4 files changed, 118 insertions, 1 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;
diff --git a/debian/changelog b/debian/changelog
index 28f6c9e61..99d01554d 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,8 +4,10 @@ ikiwiki (1.31) UNRELEASED; urgency=low
   * Change the rss feed title from the wikiname to the page title.
     Overriding the page title with meta title already overrode the rss feed
     tittle.
+  * 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.
 
- -- Joey Hess <joeyh@debian.org>  Fri, 20 Oct 2006 16:53:36 -0400
+ -- Joey Hess <joeyh@debian.org>  Sat, 21 Oct 2006 17:13:47 -0400
 
 ikiwiki (1.30) unstable; urgency=low
 
diff --git a/doc/logo.mdwn b/doc/logo.mdwn
index 339457d2f..35ec21748 100644
--- a/doc/logo.mdwn
+++ b/doc/logo.mdwn
@@ -26,6 +26,8 @@ added).
   Some other alternate icons and buttons are also included in the svg file
   and can be extracted by specifying their names.
 
+  [[img ikiwiki.png alt="bob" size="200x200"]]
+
   Contributed by Recai Oktaş
 
 * [[ikiwiki_logo|ikiwiki_old.png]] 
diff --git a/doc/plugins/img.mdwn b/doc/plugins/img.mdwn
new file mode 100644
index 000000000..4a92cefc4
--- /dev/null
+++ b/doc/plugins/img.mdwn
@@ -0,0 +1,28 @@
+[[template id=plugin name=img author="Christian Mock"]]
+[[tag type/chrome]]
+
+This is an image handling plugin. While ikiwiki supports inlining full-size
+images by making a [[WikiLink]] that points to the image, using this plugin
+you can easily scale down an image for inclusion onto a page, providing a
+link to a full-size version.
+
+This plugin uses the [ImageMagick](http://www.imagemagick.org/) tools via
+[PerlMagick](http://www.imagemagick.org/www/perl-magick.html).
+
+Note that this is a stripped down version of Christian Mock's
+[[original_img_plugin|contrib/img]].
+
+## usage
+
+	\[[img image1.jpg size="200x200" alt="clouds"]]
+
+Or set default values that will be applied to all later images on the page,
+unless overridden. Useful when including many images on a page.
+
+	\[[img defaults size=200x200 alt="wedding photo"]]
+	\[[img photo1.jpg]]
+	\[[img photo2.jpg]]
+	\[[img photo3.jpg size=200x600]]
+
+The `alt` parameter is optional. The `size` parameter is also optional,
+defaulting to full size.