--- loncom/homework/structuretags.pm	2000/08/25 14:40:47	1.5
+++ loncom/homework/structuretags.pm	2000/09/14 15:41:32	1.6
@@ -1,5 +1,4 @@
-# The LearningOnline Network with CAPA
-# <script> definiton
+# The LearningOnline Network with CAPA # <script> definiton
 
 package Apache::structuretags; 
 
@@ -7,7 +6,7 @@ use strict;
 use Apache::lonnet;
 
 sub BEGIN {
-  &Apache::lonxml::register('Apache::structuretags',('block','while'));
+  &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist'));
 }
 
 sub start_block {
@@ -44,7 +43,6 @@ sub start_while {
      my $tempparser=HTML::TokeParser->new(\$bodytext);
      push (@$parser,$tempparser);
   }
-
   return "";
 }
 
@@ -60,5 +58,56 @@ sub end_while {
   return "";
 }
 
+# <randomlist> 
+#  <tag1>..</tag1>
+#  <tag2>..</tag2>
+#  <tag3>..</tag3>
+#  ... 
+# </randomlist>
+sub start_randomlist {
+  my ($target,$token,$parstack,$parser,$safeeval)=@_;
+  my $body= &Apache::lonxml::get_all_text("randomlist",$$parser[$#$parser]);
+  my $b_parser= HTML::TokeParser->new(\$body);
+  my $b_tok;
+  my @randomlist;
+  my $list_item;
+  my $param;
+
+  while($b_tok = $b_parser->get_token() ) {
+    if($b_tok->[0] eq 'S') { # start tag
+    # get content of the tag until matching end tag
+    # get all text upto the matching tag
+    # and push the content into @randomlist
+      $list_item = &Apache::lonxml::get_all_text($b_tok->[1],$b_parser);
+      $param='';
+      map {$param .= "$_=\"$b_tok->[2]->{$_}\" "} @{$b_tok->[3]};
+      $param=~ s/^\s*(\S+)\s*$/$1/;
+      $param= " $param" if $param ne "";
+      $list_item = "<$b_tok->[1]"."$param>"."$list_item"."</$b_tok->[1]>";
+      print "<B>START-TAG $b_tok->[1], $list_item</B><BR>";
+      push(@randomlist,$list_item);
+    }
+    if($b_tok->[0] eq 'T') { # text
+    # what to do with text in between tags?
+      #  print "<B>TEXT $b_tok->[1]</B><BR>";
+    }
+    # if($b_tok->[0] eq 'E') { # end tag, should not happen
+      #  print "<B>END-TAG $b_tok->[1]</B><BR>";
+    # }
+  }
+  # randomly select one item from the array @randomlist 
+  # and created a new parser for it and push it onto the
+  # parser stack
+  my $bodytext = $randomlist[int(rand($#randomlist - 1)) + 1];
+  my $tempparser=HTML::TokeParser->new(\$bodytext);
+  print "SELECT-BODY<B>$bodytext</B><BR>";
+  push (@$parser,$tempparser);
+  return "";
+}
+
+sub end_randomlist {
+}
+
+
 1;
 __END__