--- loncom/interface/lonnavmaps.pm	2010/03/29 14:50:46	1.446
+++ loncom/interface/lonnavmaps.pm	2010/06/16 23:42:55	1.448
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.446 2010/03/29 14:50:46 raeburn Exp $
+# $Id: lonnavmaps.pm,v 1.448 2010/06/16 23:42:55 raeburn Exp $
 
 #
 # Copyright Michigan State University Board of Trustees
@@ -1802,40 +1802,6 @@ sub add_linkitem {
     $$linkitems{$name}{'text'}=&mt($text);
 }
 
-sub show_linkitems {
-    my ($linkitems)=@_;
-    my @linkorder = ("blank","launchnav","closenav","firsthomework",
-		     "everything","uncompleted","changefolder","clearbubbles");
-    
-    my $result .= (<<ENDBLOCK);
-              <td align="left">
-<script type="text/javascript">
-    function changeNavDisplay () {
-	var navchoice = document.linkitems.toplink[document.linkitems.toplink.selectedIndex].value;
-ENDBLOCK
-    foreach my $link (@linkorder) {
-	$result.= "if (navchoice == '$link') {".
-	    $linkitems->{$link}{'cmd'}."}\n";
-    }
-    $result.='}
-              </script>
-                   <form name="linkitems" method="post">
-                       <span class="LC_nobreak"><select name="toplink">'."\n";
-    foreach my $link (@linkorder) {
-	if (defined($linkitems->{$link})) {
-	    if ($linkitems->{$link}{'text'} ne '') {
-		$result .= ' <option value="'.$link.'">'.
-		    $linkitems->{$link}{'text'}."</option>\n";
-	    }
-	}
-    }
-    $result .= '</select>&nbsp;<input type="button" name="chgnav"
-                   value="Go" onclick="javascript:changeNavDisplay()" />
-                </span></form></td>'."\n";
-	
-    return $result;
-}
-
 sub show_linkitems_toolbar {
     my ($linkitems,$condition)=@_;
     my @linkorder = ('firsthomework','everything','uncompleted',
@@ -2338,7 +2304,7 @@ resource object.
 Based on the symb of the resource, get a resource object for that
 resource. This is one of the proper ways to get a resource object.
 
-=item * B<getMapByMapPc>(map_pc):
+=item * B<getByMapPc>(map_pc):
 
 Based on the map_pc of the resource, get a resource object for
 the given map. This is one of the proper ways to get a resource object.
@@ -2608,7 +2574,7 @@ in the filter function.
 Retrieves version infomation for a url. Returns the version (a number, or 
 the string "mostrecent") for resources which have version information in  
 the big hash.
-    
+
 =cut
 
 
@@ -3874,6 +3840,12 @@ resource of the map.
 
 Returns a string with the type of the map in it.
 
+=item *B<map_hierarchy>:
+
+Returns a string with a comma-separated ordered list of map_pc IDs
+for the hierarchy of maps containing a map, with the top level
+map first, then descending to deeper levels, with the enclosing map last.
+
 =back
 
 =cut
@@ -3904,6 +3876,11 @@ sub map_type {
     my $pc = $self->map_pc();
     return $self->navHash("map_type_$pc", 0);
 }
+sub map_hierarchy {
+    my $self = shift;
+    my $pc = $self->map_pc();
+    return $self->navHash("map_hierarchy_$pc", 0);
+}
 
 #####
 # Property queries