* New pagestats plugin from Enrico, which can generate a table counting

  the backlinks for each page, or a del.icio.us style cloud.

6 files changed, 102 insertions, 3 deletions

diff --git a/IkiWiki/Plugin/pagestats.pm b/IkiWiki/Plugin/pagestats.pm
new file mode 100644
index 000000000..34fd11715
--- /dev/null
+++ b/IkiWiki/Plugin/pagestats.pm
@@ -0,0 +1,64 @@
+#!/usr/bin/perl
+#
+# Produce page statistics in various forms.
+#
+# Currently supported:
+#   cloud: produces statistics in the form of a del.icio.us-style tag cloud
+#          (default)
+#   table: produces a table with the number of backlinks for each page
+#
+# By Enrico Zini.
+package IkiWiki::Plugin::pagestats;
+
+use warnings;
+use strict;
+use IkiWiki;
+
+# Names of the HTML classes to use for the tag cloud
+our @classes = ('smallestPC', 'smallPC', 'normalPC', 'bigPC', 'biggestPC' );
+
+sub import { #{{{
+	IkiWiki::hook(type => "preprocess", id => "pagestats",
+		call => \&preprocess);
+} # }}}
+
+sub preprocess (@) { #{{{
+	my %params=@_;
+	$params{pages}="*" unless defined $params{pages};
+	my $style = ($params{style} or 'cloud');
+	
+	# Needs to update whenever a page is added or removed, so
+	# register a dependency.
+	IkiWiki::add_depends($params{page}, $params{pages});
+	
+	my %counts;
+	my $max = 0;
+	foreach my $page (%IkiWiki::links) {
+		if (IkiWiki::globlist_match($page, $params{pages})) {
+			my @bl = IkiWiki::backlinks($page);
+			$counts{$page} = scalar(@bl);
+			$max = $counts{$page} if $counts{$page} > $max;
+		}
+	}
+
+	if ($style eq 'table') {
+		return "<table class='pageStats'>\n".join("\n", map { "<tr><td>$_</td><td>".$counts{$_}."</td></tr>" }
+		      sort { $counts{$b} <=> $counts{$a} } keys %counts)."\n</table>\n" ;
+	} else {
+		# In case of misspelling, default to a page cloud
+
+		my $res = "<div class='pagecloud'>\n";
+		foreach my $page (sort keys %counts) {
+			my $class = $classes[$counts{$page} * scalar(@classes) / ($max + 1)];
+			my $link = IkiWiki::abs2rel(IkiWiki::htmlpage($page), IkiWiki::dirname($params{page}));
+			$res .= sprintf("<span class='%s'><a href='%s'>%s</a></span>\n",
+					$class, $link, $page);
+				
+		}
+		$res .= "</div>\n";
+
+		return $res;
+	}
+} # }}}
+
+1
diff --git a/basewiki/style.css b/basewiki/style.css
index f96e11ab0..ebc912553 100644
--- a/basewiki/style.css
+++ b/basewiki/style.css
@@ -108,3 +108,15 @@ td.changelog {
 	color: white !important;
 	background: #ff9900;
 }
+
+/* Tag cloud. */
+.pagecloud {
+	float: right;
+	width: 30%;
+	text-align: center;
+}
+.smallestPC { font-size: 70%; }
+.smallPC { font-size: 85%; }
+.normalPC { font-size: 100%; }
+.bigPC { font-size: 115%; }
+.biggestPC { font-size: 130%; }
diff --git a/debian/changelog b/debian/changelog
index 015c16ff1..c50f52eae 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,11 +1,18 @@
-ikiwiki (1.12) UNRELEASED; urgency=low
+ikiwiki (1.13) UNRELEASED; urgency=low
+
+  * New pagestats plugin from Enrico, which can generate a table counting
+    the backlinks for each page, or a del.icio.us style cloud.
+
+ -- Joey Hess <joeyh@debian.org>  Sat, 29 Jul 2006 13:30:16 -0400
+
+ikiwiki (1.12) unstable; urgency=low
 
   * Add getopt hook type, this allows plugins to add new command-line options.
   * Add --tagbase option to tag plugin.
   * Add exclude option in setup files, works same as --exclude.
   * Put categories in rss feeds for tagged items.
 
- -- Joey Hess <joeyh@debian.org>  Sat, 29 Jul 2006 02:58:23 -0400
+ -- Joey Hess <joeyh@debian.org>  Sat, 29 Jul 2006 03:24:58 -0400
 
 ikiwiki (1.11) unstable; urgency=low
 
diff --git a/doc/plugins/pagestats.mdwn b/doc/plugins/pagestats.mdwn
new file mode 100644
index 000000000..41c853b16
--- /dev/null
+++ b/doc/plugins/pagestats.mdwn
@@ -0,0 +1,13 @@
+This plugin can generate stats about how pages link to each other. It can
+produce either a del.icio.us style cloud, or a table counting the number of
+links to each page.
+
+Here's how to use it to create a [[tag]] cloud:
+
+	\[[pagestats pages="tags/*"]]
+
+And here's how to create a table of all the pages on the wiki:
+
+	\[[pagestats style="table"]]
+
+This plugin is included in ikiwiki, but is not enabled by default.
diff --git a/doc/tags.mdwn b/doc/tags.mdwn
index 36753a5b4..8d3a85cef 100644
--- a/doc/tags.mdwn
+++ b/doc/tags.mdwn
@@ -17,3 +17,6 @@ One way to use these tags is to create a [[blog]] of pages that have a
 particular set of tags. Or just look at the [[BackLinks]] to a tag page to
 see all the pages that are tagged with it. [[Plugins]] can be written to do
 anything else with tags that you might desire.
+
+Once you have tags, you can use the [[plugins/pagestats]] plugin to
+generate tag clouds.
diff --git a/doc/todo/plugin.mdwn b/doc/todo/plugin.mdwn
index 7f427ec96..0f37d6190 100644
--- a/doc/todo/plugin.mdwn
+++ b/doc/todo/plugin.mdwn
@@ -6,7 +6,7 @@ Suggestions of ideas for plugins:
 * a [[link_map]]
 * [[sigs]] ?
 * [[pageindexes]]
-* Wiki stats, such as total number of links, most linked to pages
+* Wiki stats, such as total number of links, most linked to pages (done)
 
 * Support [[RecentChanges]] as a regular page containing a plugin that
   updates each time there is a change, and statically builds the recent