--- loncom/homework/response.pm	2003/04/30 21:19:13	1.73
+++ loncom/homework/response.pm	2003/05/16 20:16:18	1.78
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.73 2003/04/30 21:19:13 albertel Exp $
+# $Id: response.pm,v 1.78 2003/05/16 20:16:18 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -83,18 +83,23 @@ sub setrandomnumber {
 	$rndseed=$ENV{'form.rndseed'};
 	if (!$rndseed) { $rndseed=time; }
     } else {
-	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
-	$rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
+	$rndseed=&Apache::lonnet::rndseed();
     }
     &Apache::lonxml::debug("randseed $rndseed");
     #  $rndseed=unpack("%32i",$rndseed);
-    $rndseed=$rndseed
-	+(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
+    my $rndmod=(&Apache::lonnet::numval($Apache::inputtags::part) << 10);
     if (defined($Apache::inputtags::response['-1'])) {
-	$rndseed=$rndseed
-	    +&Apache::lonnet::numval($Apache::inputtags::response['-1']);
+       $rndmod+=&Apache::lonnet::numval($Apache::inputtags::response[-1]);
     }
-    &Math::Random::random_set_seed_from_phrase($rndseed);
+    if ($rndseed =~/,/) {
+	my ($num1,$num2)=split(/,/,$rndseed);
+	$num1+=$rndmod;
+	$num2+=$rndmod;
+	$rndseed="$num1,$num2";
+    } else {
+	$rndseed+=$rndmod;
+    }
+    &Apache::lonnet::setup_random_from_rndseed($rndseed);
     &Apache::lonxml::debug("randseed $rndseed");
     return '';
 }
@@ -358,12 +363,17 @@ sub setup_params {
 sub answer_header {
     my ($type) = @_;
     my $result;
-    if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse' ) {
-	$result = '<table border="1"><tr><th>Answer for Part:'.
-	    $Apache::inputtags::part. '</th></tr><tr>'."\n";
+    if ($ENV{'form.answer_output_mode'} eq 'tex') {
+	$result = ' \vskip 0 mm \begin{tabular}{|c|}\hline Answer for Part: '.
+                  $Apache::inputtags::part.' \\\\ \hline ';
     } else {
-	$result = '<table border="1"><tr><td>Answer for Part:'.
-	    $Apache::inputtags::part. '</td>'."\n";
+	if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse' ) {
+	    $result = '<table border="1"><tr><th>Answer for Part:'.
+		$Apache::inputtags::part. '</th></tr><tr>'."\n";
+	} else {
+	    $result = '<table border="1"><tr><td>Answer for Part:'.
+		$Apache::inputtags::part. '</td>'."\n";
+	}
     }
     return $result;
 }
@@ -371,10 +381,14 @@ sub answer_header {
 sub answer_part {
     my ($type,$answer) = @_;
     my $result;
-    if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse') {
-	$result = '<td>'.$answer.'</td>';
+    if ($ENV{'form.answer_output_mode'} eq 'tex') {
+	$result = ' '.$answer.'\\\\ \hline ';
     } else {
-	$result = '<td>'.$answer.'</td>';
+	if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse') {
+	    $result = '<td>'.$answer.'</td>';
+	} else {
+	    $result = '<td>'.$answer.'</td>';
+	}
     }
     return $result;
 }
@@ -382,10 +396,14 @@ sub answer_part {
 sub answer_footer {
     my ($type) = @_;
     my $result;
-    if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse') {
-	$result = '</tr></table>';
+    if ($ENV{'form.answer_output_mode'} eq 'tex') {
+	$result = ' \end{tabular} \vskip 0 mm ';
     } else {
-	$result = '</tr></table>';
+	if ($type eq 'optionresponse' || $type eq 'radiobuttonresponse') {
+	    $result = '</tr></table>';
+	} else {
+	    $result = '</tr></table>';
+	}
     }
     return $result;
 }
@@ -451,6 +469,58 @@ sub scored_response {
     return $repetition;
 }
 
+sub whichorder {
+    my ($max,$randomize,$showall,$hash)=@_;
+    #&Apache::lonxml::debug("man $max randomize $randomize");
+    if (!defined(@{ $$hash{'names'} })) { return; }
+    my @names = @{ $$hash{'names'} };
+    my @whichopt =();
+    my (%top,@toplist,%bottom,@bottomlist);
+    if (!($showall || ($randomize eq 'no'))) {
+	my $current=0;
+	foreach my $name (@names) {
+	    $current++;
+	    if ($$hash{"$name.location"} eq 'top') {
+		$top{$name}=$current;
+	    } elsif ($$hash{"$name.location"} eq 'bottom') {
+		$bottom{$name}=$current;
+	    }
+	}
+    }
+    my $topcount=0;
+    my $bottomcount=0;
+    while (((scalar(@whichopt)+$topcount+$bottomcount) < $max || $showall)
+	   && ($#names > -1)) {
+	#&Apache::lonxml::debug("Have $#whichopt max is $max");
+	my $aopt;
+	if ($showall || ($randomize eq 'no')) {
+	    $aopt=0;
+	} else {
+	    $aopt=int(&Math::Random::random_uniform() * ($#names+1));
+	}
+	#&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
+	$aopt=splice(@names,$aopt,1);
+	#&Apache::lonxml::debug("Picked $aopt");
+	if ($top{$aopt}) {
+	    $toplist[$top{$aopt}]=$aopt;
+	    $topcount++;
+	} elsif ($bottom{$aopt}) {
+	    $bottomlist[$bottom{$aopt}]=$aopt;
+	    $bottomcount++;
+	} else {
+	    push (@whichopt,$aopt);
+	}
+    }
+    for (my $i=0;$i<=$#toplist;$i++) {
+	if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
+    }
+    for (my $i=0;$i<=$#bottomlist;$i++) {
+	if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
+    }
+
+    return @whichopt;
+}
+
 1;
 __END__