--- loncom/homework/response.pm	2007/04/17 23:25:09	1.162
+++ loncom/homework/response.pm	2008/09/05 21:32:56	1.201
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.162 2007/04/17 23:25:09 albertel Exp $
+# $Id: response.pm,v 1.201 2008/09/05 21:32:56 riegler Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -391,7 +391,6 @@ sub start_customresponse {
 						  $safeeval,'answerdisplay');
 	if ($constructtag) {
 	    $result = &Apache::edit::rebuild_tag($token);
-	    $result.=&Apache::edit::handle_insert();
 	}
     } elsif ($target eq 'answer' || $target eq 'grade') {
 	&Apache::response::reset_params();
@@ -447,9 +446,17 @@ sub end_customresponse {
 	$result .= &Apache::response::answer_part('customresponse',$answer);
 	$result .= &Apache::response::answer_footer('customresponse');
     }
+    if ($target eq 'web') {
+	&setup_prior_tries_hash(\&format_prior_response_math);
+    }
     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
 	$target eq 'tex' || $target eq 'analyze') {
-	&Apache::lonxml::increment_counter(&Apache::response::repetition());
+	&Apache::lonxml::increment_counter(&Apache::response::repetition(),
+					   "$part.$id");
+	if ($target eq 'analyze') {
+            $Apache::lonhomework::analyze{"$part.$id.type"} = 'customresponse';
+	    &Apache::lonhomework::set_bubble_lines();
+	}
     }
     pop(@Apache::lonxml::namespace);
     pop(@Apache::response::custom_answer);
@@ -459,6 +466,11 @@ sub end_customresponse {
     return $result;
 }
 
+sub format_prior_response_custom {
+    my ($mode,$answer) =@_;
+    return '<span class="LC_prior_custom">'.
+	    &HTML::Entities::encode($answer,'"<>&').'</span>';
+}
 
 sub start_mathresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
@@ -474,6 +486,10 @@ sub start_mathresponse {
 						   $safeeval);
 	    $Apache::inputtags::answertxt{$id}=[$answer];
 	}
+        if ($Apache::inputtags::status['-1'] eq 'CAN_ANSWER') {
+            $result.=&edit_mathresponse_button($id,"HWVAL_$id");
+        }
+
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_start($target,$token);
 	$result.=&Apache::edit::text_arg('String to display for answer:',
@@ -483,15 +499,18 @@ sub start_mathresponse {
 					   ['maxima'],
 					   $token);
 	$result.=&Apache::edit::text_arg('Argument Array:',
-					 'args',$token);
+					 'args',$token).
+                 &Apache::loncommon::help_open_topic('Maxima_Argument_Array');
+        $result.=&Apache::edit::text_arg('Libraries:',
+                                         'libraries',$token).
+                 &Apache::loncommon::help_open_topic('Maxima_Libraries');
 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
 	my $constructtag;
 	$constructtag=&Apache::edit::get_new_args($token,$parstack,
-						  $safeeval,'answerdisplay','cas','args');
+						  $safeeval,'answerdisplay','cas','args','libraries');
 	if ($constructtag) {
 	    $result = &Apache::edit::rebuild_tag($token);
-	    $result.=&Apache::edit::handle_insert();
 	}
     } elsif ($target eq 'answer' || $target eq 'grade') {
 	&Apache::response::reset_params();
@@ -501,6 +520,23 @@ sub start_mathresponse {
     return $result;
 }
 
+sub edit_mathresponse_button {
+    my ($id,$field)=@_;
+    my $button=&mt('Edit Answer');
+#    my $helplink=&Apache::loncommon::help_open_topic('Formula_Editor');
+    my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
+    return(<<ENDFORMULABUTTON);
+<script language="JavaScript">
+function edit_${id}_${field} (textarea) {
+    thenumber = textarea;
+    thedata = document.forms['lonhomework'].elements[textarea].value;
+    newwin = window.open("/adm/dragmath/applet/MaximaPopup.html","","width=565,height=400,resizable");
+}
+</script>
+<a href="javascript:edit_${id}_${field}('${field}');void(0);"><img class="stift" src='$iconpath/stift.gif' alt='$button' title='$button'/></a>
+ENDFORMULABUTTON
+}
+
 sub end_mathresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;
@@ -521,7 +557,8 @@ sub end_mathresponse {
 	    my $cas = &Apache::lonxml::get_param('cas',$parstack,$safeeval);
             if ($cas eq 'maxima') {
                 my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
-                $award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer[-1],$response,$args);
+                $award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer[-1],$response,$args,
+                                                      &Apache::lonxml::get_param('libraries',$parstack,$safeeval));
             }
 	    if (!&Apache::inputtags::valid_award($award)) {
 		$error = $award;
@@ -536,6 +573,10 @@ sub end_mathresponse {
 	    }
 	}
     }
+    if ($target eq 'web') {
+	&setup_prior_tries_hash(\&format_prior_response_math);
+    }
+
     pop(@Apache::lonxml::namespace);
     pop(@Apache::response::custom_answer);
     pop(@Apache::response::custom_answer_type);
@@ -544,6 +585,12 @@ sub end_mathresponse {
     return $result;
 }
 
+sub format_prior_response_math {
+    my ($mode,$answer) =@_;
+    return '<span class="LC_prior_math">'.
+	    &HTML::Entities::encode($answer,'"<>&').'</span>';
+}
+
 sub implicit_multiplication {
     my ($expression)=@_;
 # Escape scientific notation, so 3e8 does not become 3*e*8
@@ -553,15 +600,15 @@ sub implicit_multiplication {
     $expression=~s/(\d+)(?:x|\*)10(?:\^|\*\*)([\+\-]*\d+)/$1\&\($2\)/gsi;
 # Fill in multiplication signs
 # a b -> a*b;3 b -> 3*b;3 4 -> 3*4
-    $expression=~s/(\w)\s+(\w)/$1\*$2/gs;
+    $expression=~s/([A-Za-z0-9])\s+(?=[A-Za-z0-9])/$1\*/gs;
 # )( -> )*(; ) ( -> )*(
     $expression=~s/\)\s*\(/\)\*\(/gs;
 # 3a -> 3*a; 3( -> 3*(; 3 ( -> 3*(; 3A -> 3*A
     $expression=~s/(\d)\s*([a-zA-Z\(])/$1\*$2/gs;
 # a ( -> a*(
-    $expression=~s/(\w)\s+\(/$1\*\(/gs;
+    $expression=~s/([A-Za-z0-9])\s+\(/$1\*\(/gs;
 # )a -> )*a; )3 -> )*3; ) 3 -> )*3
-    $expression=~s/\)\s*(\w)/\)\*$1/gs;
+    $expression=~s/\)\s*([A-Za-z0-9])/\)\*$1/gs;
 # 3&8 -> 3e8; 3&-4 -> 3e-4
     $expression=~s/(\d+)\&\(([\+\-]*\d+)\)/$1e$2/gs;
     return $expression;
@@ -655,11 +702,11 @@ sub start_responseparam {
 		$Apache::lonnet::packagetab{"$tag&$name&display"};
 	    $token->[2]->{'default'}=
 		$Apache::lonnet::packagetab{"$tag&$name&default"};
+            $token->[3] = ['name','type','description','default'];
 	    $constructtag=1;
 	}
 	if ($constructtag) {
 	    $result = &Apache::edit::rebuild_tag($token);
-	    $result.=&Apache::edit::handle_insert();
 	}
     } elsif ($target eq 'grade' || $target eq 'answer' || $target eq 'web' ||
 	     $target eq 'tex' || $target eq 'analyze' ) {
@@ -780,9 +827,13 @@ sub answer_part {
 		    last;
 		}
 	    }
-	    if ($answer ne '') {
-		$answer = '\verb'.$to_use.$answer.$to_use;
-	    }
+            my $fullanswer=$answer;
+            $answer='';
+            foreach my $element (split(/[\;]/,$fullanswer)) {
+	       if ($element ne '') {
+	 	  $answer.= '\verb'.$to_use.$element.$to_use.' \newline';
+	       }
+            }
 	}
 	if ($answer ne '') {
 	    push(@answer_bits,$answer);
@@ -801,12 +852,17 @@ sub answer_footer {
     my ($type) = @_;
     my $result;
     if ($env{'form.answer_output_mode'} eq 'tex') {
-	my $columns = scalar(@answer_bits);
-	$result  = ' \vskip 0 mm \noindent \begin{tabular}{|'.'c|'x$columns.'}\hline ';
-	$result .= join(' & ',@answer_bits);
-	$result .= ' \\\\ \\hline \end{tabular} \vskip 0 mm ';
+	$result  = ' \vskip 0 mm \noindent \begin{tabular}{|p{1.5cm}|p{6.8cm}|}\hline ';
+	$result .= $answer_bits[0].'&\vspace*{-4mm}\begin{itemize}';
+        for (my $i=1;$i<=$#answer_bits;$i++) {
+            $result.='\item '.$answer_bits[$i].'\vspace*{-7mm}';
+        }
+	$result .= ' \end{itemize} \\\\ \hline \end{tabular} \vskip 0 mm ';
     } else {
-	$result = '</tr></table>';
+	if (!$need_row_start) {
+	    $result .= '</tr>';
+	}
+	$result .= '</table>';
     }
     return $result;
 }
@@ -826,14 +882,44 @@ sub showallfoils {
     return 0;
 }
 
+=pod
+
+=item &getresponse($offset,$resulttype);
+
+Retreives the current submitted response, helps out in the case of
+scantron mode.
+
+Returns either the exact text of the submission, or a bubbled response
+converted to something usable.
+
+Optional Arguments:
+  $offset - (defaults to 1) if a problem has more than one bubble
+            response, pass in the number of the bubble wanted, (the
+            first bubble associated with a problem has an offset of 1,
+            the second bubble is 2
+
+  $resulttype - undef    -> a number between 0 and 25
+                'A is 1' -> a number between 1 and 26
+                'letter' -> a letter between 'A' and 'Z'
+  $lines  - undef problem only needs a single line of bubbles.
+            nonzero  Problem wants the first nonempty response in 
+                      $lines lines of bubbles.
+  $bubbles_per_line - Must be provided if lines is defined.. number of
+                      bubbles on a line.
+
+=cut
+
 sub getresponse {
-    my ($temp,$resulttype)=@_;
+    my ($offset,$resulttype, $lines, $bubbles_per_line)=@_;
     my $formparm='form.HWVAL_'.$Apache::inputtags::response['-1'];
     my $response;
-    if (!defined($temp)) {
-	$temp=1;
+    if (!defined($offset)) {
+	$offset=1;
     } else {
-	$formparm.=":$temp";
+	$formparm.=":$offset";
+    }
+    if (!defined($lines)) {
+	$lines = 1;
     }
     my %let_to_num=('A'=>0,'B'=>1,'C'=>2,'D'=>3,'E'=>4,'F'=>5,'G'=>6,'H'=>7,
 		    'I'=>8,'J'=>9,'K'=>10,'L'=>11,'M'=>12,'N'=>13,'O'=>14,
@@ -842,8 +928,17 @@ sub getresponse {
     if ($env{'form.submitted'} eq 'scantron') {
 	my $part  = $Apache::inputtags::part;
 	my $id    = $Apache::inputtags::response[-1];
-	$response = $env{'scantron.'.($Apache::lonxml::counter+$temp-1).
-			 '.answer'};
+	
+	my $line;
+	for ($line = 0; $line < $lines; $line++) {
+	    my $theline = $Apache::lonxml::counter+$offset-1+$line;
+	    $response = $env{"scantron.$theline.answer"};
+	    if ((defined($response)) && ($response ne "") && ($response ne " ")) {
+		last;
+	    }
+	    
+	}
+
 	# save bubbled letter for later
 	$Apache::lonhomework::results{"resource.$part.$id.scantron"}.=
 	    $response;
@@ -853,13 +948,35 @@ sub getresponse {
 	    } else {
 		$response = $let_to_num{$response};
 	    }
+	    if ($response ne "") {
+		$response += $line * $bubbles_per_line;
+	    }
+	} else {
+	    if ($response ne "") {
+		$response = chr(ord($response) + $line * $bubbles_per_line);
+	    }
 	}
+
     } else {
 	$response = $env{$formparm};
     }
+    # 
+    #  If we have a nonempty answer, correct the numeric value
+    #  of the answer for the line on which it was found.
+    #
+
     return $response;
 }
 
+=pod
+
+=item &repetition();
+
+Returns the number of lines that are required to encode the weight.
+(Currently expects that there are 10 bubbles per line)
+
+=cut
+
 sub repetition {
     my $id = $Apache::inputtags::part;
     my $weight = &Apache::lonnet::EXT("resource.$id.weight");
@@ -869,6 +986,30 @@ sub repetition {
     return $repetition;
 }
 
+=pod
+
+=item &scored_response($part_id,$response_id);
+
+Sets the results hash elements
+
+   resource.$part_id.$response_id.awarded - to the floating point
+     number between 0 and 1 that was awarded on the bubbled input
+
+   resource.$part_id.$response_id.awarddetail - to 'ASSIGNED_SCORE'
+
+Returns
+
+   the number of bubble sheet lines that were used (and likely need to
+     be passed to &Apache::lonxml::increment_counter()
+
+Arguments
+
+   $part_id - id of the part to grade
+   $response_id - id of the response to grade
+  
+
+=cut
+
 sub scored_response {
     my ($part,$id)=@_;
     my $repetition=&repetition();
@@ -943,7 +1084,7 @@ sub show_answer {
     my $award  = $Apache::lonhomework::history{"resource.$part.solved"};
     my $status = $Apache::inputtags::status[-1];
     return  ( ($award =~ /^correct/
-	       && lc($Apache::lonhomework::problemstatus) ne 'no')
+	       && &Apache::lonhomework::show_problem_status())
 	      || $status eq "SHOW_ANSWER");
 }
 
@@ -1004,7 +1145,17 @@ sub pick_foil_for_concept {
 	$Apache::response::conceptgroup{'names'};
 
 }
-
+#------------------------------------------------------------
+#
+#  Get a parameter associated with a problem.
+# Parameters:
+#  $id        - the id of the paramater, either a part id, 
+#               or a partid and responspe id joined by _
+#  $name      - Name of the parameter to fetch
+#  $default   - Default value for the paramter.
+#
+#  
+#
 sub get_response_param {
     my ($id,$name,$default)=@_;
     my $parameter;
@@ -1095,6 +1246,21 @@ sub check_status {
     return 2;
 }
 
+=pod
+
+=item setup_prior_tries_hash($func,$data)
+
+  Foreach each past .submission $func is called with 3 arguments
+     - the mode to set things up for (currently always 'grade')
+     - the stored .submission string
+     - The expansion of $data
+
+  $data is an array ref containing elements that are either
+    - scalars that are other elements of the history hash to pass to $func
+    - ref to data to be passed untouched to $func
+
+=cut
+
 sub setup_prior_tries_hash {
     my ($func,$data) = @_;
     my $part = $Apache::inputtags::part;