+}
+
+sub pagetemplate (@) {
+ my %params=@_;
+ my $page=$params{page};
+ my $destpage=$params{destpage};
+ my $template=$params{template};
+
+ if (exists $metaheaders{$page} && $template->query(name => "meta")) {
+ # avoid duplicate meta lines
+ my %seen;
+ $template->param(meta => join("\n", grep { (! $seen{$_}) && ($seen{$_}=1) } @{$metaheaders{$page}}));
+ }
+ if (exists $pagestate{$page}{meta}{title} && $template->query(name => "title")) {
+ $template->param(title => HTML::Entities::encode_numeric($pagestate{$page}{meta}{title}));
+ $template->param(title_overridden => 1);
+ }
+
+ foreach my $field (qw{author authorurl permalink}) {
+ $template->param($field => $pagestate{$page}{meta}{$field})
+ if exists $pagestate{$page}{meta}{$field} && $template->query(name => $field);
+ }
+
+ foreach my $field (qw{description}) {
+ $template->param($field => HTML::Entities::encode_numeric($pagestate{$page}{meta}{$field}))
+ if exists $pagestate{$page}{meta}{$field} && $template->query(name => $field);
+ }
+
+ foreach my $field (qw{license copyright}) {
+ if (exists $pagestate{$page}{meta}{$field} && $template->query(name => $field) &&
+ ($page eq $destpage || ! exists $pagestate{$destpage}{meta}{$field} ||
+ $pagestate{$page}{meta}{$field} ne $pagestate{$destpage}{meta}{$field})) {
+ $template->param($field => htmlize($page, $destpage, $pagestate{$page}{meta}{$field}));
+ }
+ }
+}
+
+sub get_sort_key {
+ my $page = shift;
+ my $meta = shift;
+
+ # e.g. titlesort (also makes sense for author)
+ my $key = $pagestate{$page}{meta}{$meta . "sort"};
+ return $key if defined $key;
+
+ # e.g. title
+ $key = $pagestate{$page}{meta}{$meta};
+ return $key if defined $key;
+
+ # fall back to closer-to-core things
+ if ($meta eq 'title') {
+ return pagetitle(IkiWiki::basename($page));
+ }
+ elsif ($meta eq 'date') {
+ return $IkiWiki::pagectime{$page};
+ }
+ elsif ($meta eq 'updated') {
+ return $IkiWiki::pagemtime{$page};
+ }
+ else {
+ return '';
+ }
+}
+
+sub match {
+ my $field=shift;
+ my $page=shift;
+
+ # turn glob into a safe regexp
+ my $re=IkiWiki::glob2re(shift);
+
+ my $val;
+ if (exists $pagestate{$page}{meta}{$field}) {
+ $val=$pagestate{$page}{meta}{$field};
+ }
+ elsif ($field eq 'title') {
+ $val = pagetitle($page);
+ }
+
+ if (defined $val) {
+ if ($val=~/^$re$/i) {
+ return IkiWiki::SuccessReason->new("$re matches $field of $page", $page => $IkiWiki::DEPEND_CONTENT, "" => 1);
+ }
+ else {
+ return IkiWiki::FailReason->new("$re does not match $field of $page", $page => $IkiWiki::DEPEND_CONTENT, "" => 1);
+ }
+ }
+ else {
+ return IkiWiki::FailReason->new("$page does not have a $field", $page => $IkiWiki::DEPEND_CONTENT);
+ }
+}
+
+package IkiWiki::PageSpec;
+
+sub match_title ($$;@) {
+ IkiWiki::Plugin::meta::match("title", @_);
+}
+
+sub match_author ($$;@) {
+ IkiWiki::Plugin::meta::match("author", @_);
+}
+
+sub match_authorurl ($$;@) {
+ IkiWiki::Plugin::meta::match("authorurl", @_);
+}
+
+sub match_license ($$;@) {
+ IkiWiki::Plugin::meta::match("license", @_);
+}
+
+sub match_copyright ($$;@) {
+ IkiWiki::Plugin::meta::match("copyright", @_);
+}
+
+sub match_guid ($$;@) {
+ IkiWiki::Plugin::meta::match("guid", @_);
+}
+
+package IkiWiki::SortSpec;
+
+sub cmp_meta {
+ my $meta = shift;
+ error(gettext("sort=meta requires a parameter")) unless defined $meta;
+
+ if ($meta eq 'updated' || $meta eq 'date') {
+ return IkiWiki::Plugin::meta::get_sort_key($a, $meta)
+ <=>
+ IkiWiki::Plugin::meta::get_sort_key($b, $meta);
+ }