--- loncom/homework/structuretags.pm	2010/06/05 19:36:57	1.469
+++ loncom/homework/structuretags.pm	2011/01/13 18:11:45	1.485
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.469 2010/06/05 19:36:57 www Exp $
+# $Id: structuretags.pm,v 1.485 2011/01/13 18:11:45 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -128,6 +128,7 @@ sub homework_js {
            &setmode_javascript().
 	<<'JS';
 <script type="text/javascript">
+// <![CDATA[
 function setSubmittedPart (part) {
    this.document.lonhomework.submitted.value="part_"+part;
 }
@@ -145,7 +146,7 @@ function image_response_click (which, e)
     input_element.value = click;
     img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
 }
-
+// ]]>
 </script>
 JS
 }
@@ -153,10 +154,55 @@ JS
 sub setmode_javascript {
     return <<"ENDSCRIPT";
 <script type="text/javascript">
+// <![CDATA[
 function setmode(form,probmode) {
     form.problemmode.value = probmode;
     form.submit();
 }
+// ]]>
+</script>
+ENDSCRIPT
+}
+
+sub file_delchk_js {
+    my $delfilewarn = &mt('You have indicated you wish to remove some files previously included in your submission.').'\\n'.
+                      &mt('Continue submission with these files removed?');
+    return <<"ENDSCRIPT";
+<script type="text/javascript">
+// <![CDATA[
+function file_deletion_check(formname) {
+    var elemnum = formname.elements.length;
+    if (elemnum == 0) {
+        return true;
+    }
+    var str = new RegExp("^HWFILE.+_delete\$");
+    var delboxes = new Array();
+    for (var i=0; i<formname.elements.length; i++) {
+        var id = formname.elements[i].id;
+        if (id != '') {
+            if (str.test(id)) {
+                if (formname.elements[i].type == 'checkbox') {
+                    if (formname.elements[i].checked) {
+                        delboxes.push(id);
+                    }
+                }
+            }
+        }
+    }
+    if (delboxes.length > 0) {
+        if (confirm("$delfilewarn")) {
+            return true;
+        } else {
+            for (var j=0; j<delboxes.length; j++) {
+                formname.elements[delboxes[j]].checked = false;
+            }
+            return false;
+        }
+    } else {
+        return true;
+    }
+}
+// ]]>
 </script>
 ENDSCRIPT
 }
@@ -177,12 +223,17 @@ sub page_start {
 					   $parstack,$parser,$safeeval);
     }
 
-    $extra_head .= &homework_js();
-
-    if ($env{'environment.wysiwygeditor'} eq 'on') {
-	$extra_head .= &Apache::lonhtmlcommon::dragmath_js("FCKEditMathPopup");
-    } else {
-        $extra_head .= &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
+    $extra_head .= &homework_js().
+                   &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
+    if (&Apache::lonhtmlcommon::htmlareabrowser()) {
+        my %textarea_args = (
+                                dragmath => 'math',
+                              );
+        $extra_head .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
+    }
+    my $is_task = ($env{'request.uri'} =~ /\.task$/);
+    if ($is_task) {
+        $extra_head .= &file_delchk_js();
     }
 
     my %body_args;
@@ -276,6 +327,9 @@ sub page_start {
 	if ($target eq 'edit') {
 	    $form_tag_start.=&Apache::edit::form_change_detection();
 	}
+        if ($is_task) {
+            $form_tag_start .= ' onsubmit="return file_deletion_check(this);"';
+        }
 	$form_tag_start.='>'."\n";
 
 	my $symb=&Apache::lonnet::symbread();
@@ -317,9 +371,15 @@ sub get_resource_name {
 }
 
 sub setup_rndseed {
-    my ($safeeval)=@_;
-    my $rndseed;
+    my ($safeeval,$target)=@_;
     my ($symb)=&Apache::lonnet::whichuser();
+    my ($questiontype,$set_safespace,$rndseed);
+    if ($target eq 'analyze') {
+        $questiontype = $env{'form.grade_questiontype'};
+    }
+    unless (defined($questiontype)) {
+        $questiontype = $Apache::lonhomework::type;
+    }
     if ($env{'request.state'} eq "construct" 
 	|| $symb eq '' 
 	|| $Apache::lonhomework::type eq 'practice'
@@ -334,6 +394,14 @@ sub setup_rndseed {
 	    }
 	    $env{'form.rndseed'}=$rndseed;
 	}
+        if (($env{'request.state'} eq "construct") && 
+            ($Apache::lonhomework::type eq 'randomizetry')) {
+            my $tries = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.tries"};
+            if ($tries) {
+                $rndseed += $tries;
+            }
+            $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed;
+        }
 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
 	      && $env{'form.submitted'} eq 'yes')  ||
 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
@@ -349,10 +417,42 @@ sub setup_rndseed {
         if ($Apache::lonhomework::history{'resource.CODE'}) {
 	   $rndseed=&Apache::lonnet::rndseed();
 	}
-	if ($safeeval) {
-	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
-	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
-	}
+        $set_safespace = 1;
+    } elsif ($questiontype eq 'randomizetry') {
+        if ($target eq 'analyze') {
+            if (defined($env{'form.grade_rndseed'})) {
+                $rndseed = $env{'form.grade_rndseed'};
+            }
+        }
+        unless (($target eq 'analyze') && (defined($rndseed))) {
+            $rndseed=&Apache::lonnet::rndseed();
+            my $curr_try = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.tries"};
+            if ($Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
+                $curr_try ++;
+            }
+            if ($rndseed =~/^(\d+)[,:](\d+)$/) {
+                $rndseed = $1;
+            }
+            if ($curr_try) {
+                my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
+                if (($reqtries =~ /^\d+$/) && ($reqtries > 1)) {
+                    my $inc = int(($curr_try-1)/$reqtries);
+                    $rndseed += $inc;
+                } else {
+                    $rndseed += $curr_try;
+                }
+            }
+        }
+        $set_safespace = 1;
+    }
+    if ($set_safespace) {
+        if ($safeeval) {
+            &Apache::lonxml::debug("Setting rndseed to $rndseed");
+            &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
+        }
+    }
+    unless (($env{'request.state'} eq "construct") || ($symb eq '')) {
+        $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed;
     }
     return $rndseed;
 }
@@ -401,8 +501,6 @@ sub problem_edit_footer {
   <hr style="clear:both;" />
 </div>
 '.
-
-    &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
     "\n</form>\n".&Apache::loncommon::end_page();
 }
 
@@ -472,6 +570,7 @@ sub problem_web_to_edit_header {
   ".&option('anonsurvey' ,'problemtype').&mt("Anonymous Survey Question")."</option>
   ".&option('anonsurveycred' ,'problemtype').&mt("Anonymous Survey Question (with credit)")."</option>
   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
+  ".&option('randomizetry' ,'problemtype').&mt("New Randomization Each Try")."</option>
 </select>
 </span>
 $show_all
@@ -629,9 +728,7 @@ sub finalize_storage {
 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
 					    $symb,$courseid,$domain,$name);
 	    &Apache::lonxml::debug('Store return message:'.$result);
-            if ($env{'request.role'} =~/^st/) {
-                &store_aggregates($symb,$courseid);
-            }
+            &store_aggregates($symb,$courseid);
 	}
     } else {
 	&Apache::lonxml::debug('Nothing to store');
@@ -651,7 +748,7 @@ item store_aggregates()
 
 sub store_aggregates {
     my ($symb,$courseid) = @_;
-    my %aggregate;
+    my (%aggregate,%anoncounter,%randtrycounter);
     my @parts;
     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
@@ -661,28 +758,60 @@ sub store_aggregates {
         }
     }
     foreach my $part (@parts) {
-        if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
-	    eq 'APPROX_ANS' ||
-	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
-	    eq 'EXACT_ANS') {
-            $aggregate{$symb."\0".$part."\0correct"} = 1;
+        if ($env{'request.role'} =~/^st/) {
+            if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
+	        eq 'APPROX_ANS' ||
+	        $Apache::lonhomework::results{'resource.'.$part.'.award'}
+	        eq 'EXACT_ANS') {
+                $aggregate{$symb."\0".$part."\0correct"} = 1;
+            }
+            if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
+                $aggregate{$symb."\0".$part."\0users"} = 1;
+            } else {
+                my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
+                if ($last_reset) {
+                    if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
+                        $aggregate{$symb."\0".$part."\0users"} = 1;
+                    }
+                }
+            }
+            $aggregate{$symb."\0".$part."\0attempts"} = 1;
         }
-        if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
-            $aggregate{$symb."\0".$part."\0users"} = 1;
-        } else {
-            my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
-            if ($last_reset) {
-                if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
-                    $aggregate{$symb."\0".$part."\0users"} = 1;
+        if (($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'anonsurvey') || 
+            ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'anonsurveycred') ||
+            ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'randomizetry')) {
+            if ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'randomizetry') {
+                $randtrycounter{$symb."\0".$part} = 1;
+            } else {
+                $anoncounter{$symb."\0".$part} = 1;
+            }
+            my $needsrelease = $Apache::lonnet::needsrelease{'parameter:type:'.$Apache::lonhomework::results{'resource.'.$part.'.type'}};
+            if ($needsrelease) {   
+                my $curr_required = $env{'course.'.$env{'request.course.id'}.'.internal.releaserequired'};
+                if ($curr_required eq '') {
+                    &Apache::lonnet::update_released_required($needsrelease);
+                } else {
+                    my ($currmajor,$currminor) = split(/\./,$curr_required);
+                    my ($needsmajor,$needsminor) = split(/\./,$needsrelease);
+                    if (($currmajor < $needsmajor) || ($currmajor == $needsmajor && $currminor < $needsminor)) {
+                        &Apache::lonnet::update_released_required($needsrelease);
+                    }
                 }
             }
         }
-        $aggregate{$symb."\0".$part."\0attempts"} = 1;
     }
     if (keys (%aggregate) > 0) {
 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
                             $cdomain,$cname);
     }
+    if (keys(%anoncounter) > 0) {
+        &Apache::lonnet::cput('nohist_anonsurveys',\%anoncounter,
+                              $cdomain,$cname);
+    }
+    if (keys(%randtrycounter) > 0) {
+        &Apache::lonnet::cput('nohist_randomizetry',\%randtrycounter,
+                              $cdomain,$cname);
+    }
 }
 
 sub checkout_msg {
@@ -763,6 +892,7 @@ sub init_problem_globals {
 	&Apache::lonhomework::reset_show_problem_status();
 	$Apache::lonhomework::ignore_response_errors=1;
     }
+    @Apache::functionplotresponse::callscripts=();
     @Apache::inputtags::responselist = ();
     @Apache::inputtags::importlist = ();
     @Apache::inputtags::previous=();
@@ -790,6 +920,7 @@ sub reset_problem_globals {
     undef($Apache::lonhomework::type);
     undef($Apache::lonhomework::scantronmode);
     undef($Apache::lonhomework::ignore_response_errors);
+    undef(@Apache::functionplotresponse::callscripts);
     &Apache::lonhomework::reset_show_problem_status();
 }
 
@@ -890,16 +1021,22 @@ sub start_problem {
 
     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
 
-    if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
+    if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval,$target); }
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
 	$target eq 'tex') {
 	if ($env{'form.markaccess'}) {
 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
 	    &Apache::lonnet::set_first_access($interval[1]);
 	}
+
+        ($status,$accessmsg,my $slot_name,my $slot) =
+            &Apache::lonhomework::check_slot_access('0','problem');
+        push (@Apache::inputtags::status,$status);
+
 	#handle rand seed in construction space
-	my $rndseed=&setup_rndseed($safeeval);
+	my $rndseed=&setup_rndseed($safeeval,$target);
 	my ($symb)=&Apache::lonnet::whichuser();
+
 	if ($env{'request.state'} ne "construct" && 
 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
@@ -925,11 +1062,13 @@ sub start_problem {
                 $form_tag_start.=&practice_problem_header();
             }
 	    $form_tag_start.='<hr />';
-	}
-
-	($status,$accessmsg,my $slot_name,my $slot) = 
-	    &Apache::lonhomework::check_slot_access('0','problem');
-	push (@Apache::inputtags::status,$status);
+        } elsif (($env{'request.state'} ne "construct") &&
+                 ($Apache::lonhomework::type eq 'randomizetry') &&
+                 ($status eq 'CAN_ANSWER')) {
+            my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
+            my $problemstatus = &get_problem_status($Apache::inputtags::part);
+            $form_tag_start.=&randomizetry_problem_header($problemstatus,$reqtries);
+        }
 
 	my $expression='$external::datestatus="'.$status.'";';
 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
@@ -1010,6 +1149,12 @@ sub start_problem {
 		    $result .= '<input type="hidden" name="grade_'.$field.
 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
 		}
+                foreach my $field ('trial','questiontype') {
+                    if ($env{"form.grade_$field"} ne '') {
+                        $result .= '<input type="hidden" name="grade_'.$field.
+                            '" value="'.$env{"form.grade_$field"}.'" />'."\n";
+                    }
+                }
 	    }
 	} elsif ($target eq 'tex') {
 	    $result .= 'INSERTTEXFRONTMATTERHERE';
@@ -1162,7 +1307,6 @@ sub end_problem {
 	    if ($target ne 'tex' &&
 		$env{'form.answer_output_mode'} ne 'tex') {
 		$result.="</form>";
-		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
 	    }
 	    if ($target eq 'web') {
 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
@@ -1183,6 +1327,9 @@ sub end_problem {
 		}
 	    }
 	}
+        if ($target eq 'web') {
+           $result.=&Apache::functionplotresponse::init_script();
+        }
 	if ($target eq 'grade') {
 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
 	    &finalize_storage();
@@ -1240,7 +1387,7 @@ sub start_library {
 	($result,$form_tag_start)=
 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
 			$name);
-	my $rndseed=&setup_rndseed($safeeval);
+	my $rndseed=&setup_rndseed($safeeval,$target);
 	$result.=" \n $form_tag_start".	
 		  '<input type="hidden" name="submitted" value="yes" />';
 	$result.=&problem_web_to_edit_header($rndseed);
@@ -1816,7 +1963,26 @@ sub start_part {
 
 		    }
 		} elsif ($target eq 'web') {
-		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
+                    if ($status eq 'CAN_ANSWER') {
+                        my $problemstatus = &get_problem_status($Apache::inputtags::part); 
+                        my $probrandomize = &Apache::lonnet::EXT("resource.$Apache::inputtags::partlist[0].type");
+                        my $probrandtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::partlist[0].randomizeontries");
+                        my $num = scalar(@Apache::inputtags::partlist)-1;
+                        if ($probrandomize eq 'randomizetry') {
+                            if (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.type") ne 'randomizetry') {
+                                $result .= &randomizetry_part_header($problemstatus,'none',$num);
+                            } else {
+                                my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
+                                if ($probrandtries ne $reqtries) {
+                                    $result .= &randomizetry_part_header($problemstatus,$reqtries,$num);
+                                }
+                            }
+                        } elsif (&Apache::lonnet::EXT("resource.$Apache::inputtags::part.type") eq 'randomizetry') {
+                            my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
+                            $result .= &randomizetry_part_header($problemstatus,$reqtries,$num);
+                        }
+                    }
+		    $result.='<a name="'.&escape($Apache::inputtags::part).'" ></a>';
 		}
 	    }
 	}
@@ -1987,7 +2153,8 @@ sub start_problemtype {
                                                ['anonsurvey','Anonymous Survey'],
                                                ['anonsurveycred','Anonymous Survey (with credit)'],
 					       ['problem','Homework Problem'],
-                                               ['practice','Practice Problem'] ]
+                                               ['practice','Practice Problem'],
+                                               ['randomizetry','New Randomization Each Try'] ]
 					     ,$token);
 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
@@ -2026,17 +2193,15 @@ sub end_startouttext {
 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
                  .&Apache::edit::deletelist($target,$token)
-                 .'</span></td>';
-        unless ($env{'environment.wysiwygeditor'} eq 'on') {
-	    $result .= '<td align="left">'
-		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
-		.'</td>'
-		.'<td>'
-		.&Apache::edit::insertlist($target,$token)
-		.'</td>';
-	}
-	$result.='<td align="right" valign="top">' .
-	    &Apache::loncommon::helpLatexCheatsheet().
+                 .'</span></td>'
+	         .'<td align="left"><span id="math_'.$areaid.'" />'
+		 .&Apache::lonhtmlcommon::dragmath_button($areaid,1)
+		 .'<span></td>'
+		 .'<td>'
+		 .&Apache::edit::insertlist($target,$token)
+		 .'</td>'
+	         .'<td align="right" valign="top">' .
+	         &Apache::loncommon::helpLatexCheatsheet().
 		 &Apache::edit::end_row().
                  &Apache::edit::start_spanning_row()."\n".
 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
@@ -2124,6 +2289,63 @@ sub practice_problem_header {
            '</span>';
 }
 
+sub randomizetry_problem_header {
+    my ($problemstatus,$reqtries) = @_;
+    my ($header,$text);
+    if ($reqtries > 1) {
+        $header = &mt('New Problem Variation After Every [quant,_1,Try,Tries]',$reqtries);
+        if (($problemstatus eq 'no') ||
+            ($problemstatus eq 'no_feedback_ever')) {
+            $text = &mt('A new variation will be generated after every [quant,_1,try,tries], until the tries limit is reached.',$reqtries);
+        } else {
+            $text = &mt('A new variation will be generated after every [quant,_1,try,tries], until correct or tries limit is reached.',$reqtries);
+        }
+    } else {
+        $header = &mt('New Problem Variation Each Try');
+        if (($problemstatus eq 'no') ||
+            ($problemstatus eq 'no_feedback_ever')) {
+            $text = &mt('A new variation will be generated after each try until the tries limit is reached.');
+
+        } else {
+            $text = &mt('A new variation will be generated after each try until correct or tries limit is reached.');
+        }
+    }
+    return '<span class="LC_info"><h3>'.$header.'</h3></span>'.
+           '<span class="LC_info">'.$text.'</span><hr />';
+}
+
+sub randomizetry_part_header {
+    my ($problemstatus,$reqtries,$num) = @_;
+    my ($header,$text);
+    if ($reqtries eq 'none') {
+        $header = &mt('No Question Variation');
+        $text = &mt('For this question there will no new variation after a try.');
+    } elsif ($reqtries > 1) {
+        $header = &mt('New Question Variation After Every [quant,_1,Try,Tries]',$reqtries);
+        if (($problemstatus eq 'no') ||
+            ($problemstatus eq 'no_feedback_ever')) {
+            $text = &mt('For this question a new variation will be generated after every [quant,_1,try,tries], until the tries limit is reached.',$reqtries);
+        } else {
+            $text = &mt('For this question a new variation will be generated after every [quant,_1,try,tries], until correct or tries limit is reached.',$reqtries);
+        }
+    } else {
+        $header = &mt('New Question Variation For Each Try');
+        if (($problemstatus eq 'no') ||
+            ($problemstatus eq 'no_feedback_ever')) {
+            $text =  &mt('For this question a new variation will be generated after each try until the tries limit is reached.');
+        } else {
+            $text = &mt('For this question a new variation will be generated after each try until correct or tries limit is reached.');
+        }
+    }
+    my $output;
+    if ($num > 1) {
+        $output .= '<hr />';
+    }
+    $output .=  '<span class="LC_info"><h4>'.$header.'</h4></span>'.
+                  '<span class="LC_info">'.$text.'</span><br /><br />';
+    return $output;
+}
+
 1;
 __END__