diff --git a/IkiWiki/Plugin/pagestats.pm b/IkiWiki/Plugin/pagestats.pm
index 8ab5d3666..874ead7e6 100644
--- a/IkiWiki/Plugin/pagestats.pm
+++ b/IkiWiki/Plugin/pagestats.pm
@@ -38,13 +38,22 @@ sub preprocess (@) {
# Needs to update whenever a page is added or removed, so
# register a dependency.
add_depends($params{page}, $params{pages});
+ add_depends($params{page}, $params{among}) if exists $params{among};
my %counts;
my $max = 0;
foreach my $page (pagespec_match_list([keys %links],
$params{pages}, location => $params{page})) {
use IkiWiki::Render;
- $counts{$page} = scalar(IkiWiki::backlinks($page));
+
+ my @backlinks = IkiWiki::backlink_pages($page);
+
+ if (exists $params{among}) {
+ @backlinks = pagespec_match_list(\@backlinks,
+ $params{among}, location => $params{page});
+ }
+
+ $counts{$page} = scalar(@backlinks);
$max = $counts{$page} if $counts{$page} > $max;
}
@@ -63,6 +72,8 @@ sub preprocess (@) {
my $res = "
\n";
foreach my $page (sort keys %counts) {
+ next unless $counts{$page} > 0;
+
my $class = $classes[$counts{$page} * scalar(@classes) / ($max + 1)];
$res .= "".
htmllink($params{page}, $params{destpage}, $page).
diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
index bed9cb777..5cb67ea07 100644
--- a/IkiWiki/Render.pm
+++ b/IkiWiki/Render.pm
@@ -24,13 +24,19 @@ sub calculate_backlinks () {
$backlinks_calculated=1;
}
-sub backlinks ($) {
+sub backlink_pages ($) {
my $page=shift;
calculate_backlinks();
+ return keys %{$backlinks{$page}};
+}
+
+sub backlinks ($) {
+ my $page=shift;
+
my @links;
- foreach my $p (keys %{$backlinks{$page}}) {
+ foreach my $p (backlink_pages($page)) {
my $href=urlto($p, $page);
# Trim common dir prefixes from both pages.
diff --git a/doc/ikiwiki/directive/pagestats.mdwn b/doc/ikiwiki/directive/pagestats.mdwn
index cfb5737a5..426f3e4af 100644
--- a/doc/ikiwiki/directive/pagestats.mdwn
+++ b/doc/ikiwiki/directive/pagestats.mdwn
@@ -12,4 +12,14 @@ And here's how to create a table of all the pages on the wiki:
\[[!pagestats style="table"]]
+The optional `among` parameter limits counting to pages that match a
+[[ikiwiki/PageSpec]]. For instance, to display a cloud of tags used on blog
+entries, you could use:
+
+ \[[!pagestats pages="tags/*" among="blog/posts/*"]]
+
+or to display a cloud of tags related to Linux, you could use:
+
+ \[[!pagestats pages="tags/* and not tags/linux" among="tagged(linux)"]]
+
[[!meta robots="noindex, follow"]]