po: avoid crash when page is empty

[git.ikiwiki.info.git] / IkiWiki / Plugin / map.pm

diff --git a/IkiWiki/Plugin/map.pm b/IkiWiki/Plugin/map.pm
index 120451b5dbde60a26ae165e391cf56232cc30111..788b9682706c9e3a303b0920267e8ea20061305e 100644 (file)
--- a/IkiWiki/Plugin/map.pm
+++ b/IkiWiki/Plugin/map.pm
@@ -28,12 +28,16 @@ sub preprocess (@) {
        my %params=@_;
        $params{pages}="*" unless defined $params{pages};
        
+       # Needs to update whenever a page is added or removed (or in some
+       # cases, when its content changes, if show= is specified).
+       my $deptype=deptype(exists $params{show} ? "content" : "presence");
+       
        my $common_prefix;
 
        # Get all the items to map.
        my %mapitems;
-       foreach my $page (pagespec_match_list([keys %pagesources],
-                               $params{pages}, location => $params{page})) {
+       foreach my $page (pagespec_match_list($params{page}, $params{pages},
+                                       deptype => $deptype)) {
                if (exists $params{show} && 
                    exists $pagestate{$page} &&
                    exists $pagestate{$page}{meta}{$params{show}}) {
@@ -67,20 +71,22 @@ sub preprocess (@) {
                $common_prefix=IkiWiki::dirname($common_prefix);
        }
 
-       # Needs to update whenever a page is added or removed (or in some
-       # cases, when its content changes, if show=title), so register a
-       # dependency.
-       add_depends($params{page}, $params{pages});
-       # Explicitly add all currently shown pages, to detect when pages
-       # are removed.
-       add_depends($params{page}, join(" or ", keys %mapitems));
-
        # Create the map.
        my $parent="";
        my $indent=0;
        my $openli=0;
        my $addparent="";
-       my $map = "<div class='map'>\n<ul>\n";
+       my $map = "<div class='map'>\n";
+
+       if (! keys %mapitems) {
+               # return empty div for empty map
+               $map .= "</div>\n";
+               return $map; 
+       } 
+       else {
+               $map .= "<ul>\n";
+       }
+
        foreach my $item (sort keys %mapitems) {
                my @linktext = (length $mapitems{$item} ? (linktext => $mapitems{$item}) : ());
                $item=~s/^\Q$common_prefix\E\///