--- loncom/homework/caparesponse/caparesponse.pm 2004/06/29 22:42:50 1.150 +++ loncom/homework/caparesponse/caparesponse.pm 2005/05/23 21:18:25 1.168 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # caparesponse definition # -# $Id: caparesponse.pm,v 1.150 2004/06/29 22:42:50 albertel Exp $ +# $Id: caparesponse.pm,v 1.168 2005/05/23 21:18:25 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -30,6 +30,7 @@ package Apache::caparesponse; use strict; use capa; use Apache::lonlocal; +use Apache::lonnet; BEGIN { &Apache::lonxml::register('Apache::caparesponse',('caparesponse','numericalresponse','stringresponse','formularesponse')); @@ -62,7 +63,7 @@ sub start_numericalresponse { if ($token->[1] eq 'numericalresponse') { $constructtag=&Apache::edit::get_new_args($token,$parstack, $safeeval,'answer', - 'incorrect','unit', + 'incorrect','unit', 'format'); } elsif ($token->[1] eq 'formularesponse') { $constructtag=&Apache::edit::get_new_args($token,$parstack, @@ -103,16 +104,11 @@ sub start_numericalresponse { } else { $format=$formats[0]; } - my $formatted; - if ((defined($format)) && ($format ne '')) { - $format=~s/e/E/g; - &Apache::lonxml::debug("formatting with :$format: answer :$answer:"); - $formatted=sprintf('%.'.$format,$answer).','; - } else { - &Apache::lonxml::debug("no format answer :$answer:"); - $formatted="$answer,"; - } - $answertxt.=$formatted; + if ($unit=~/\$/) { $format="\$".$format; $unit=~s/\$//g; } + if ($unit=~/\,/) { $format="\,".$format; $unit=~s/\,//g; } + my $formatted=&format_number($answer,$format,$target, + $safeeval); + $answertxt.=$formatted.','; } chop $answertxt; if ($target eq 'web') { @@ -124,6 +120,50 @@ sub start_numericalresponse { return $result; } +sub check_submission { + my ($response,$partid,$id,$tag,$parstack,$safeeval)=@_; + my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')}; + $$args_ref{'response'}=$response; + my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffunit'); + + foreach my $arg ('type','tol','sig','format','unit','calc', + 'samples') { + $$args_ref{$arg}= + &Apache::lonxml::get_param($arg,$parstack,$safeeval); + } + foreach my $key (keys(%Apache::inputtags::params)) { + $$args_ref{$key}=$Apache::inputtags::params{$key}; + } + + #no way to enter units, with radio buttons + if ($Apache::lonhomework::type eq 'exam' || + lc($hideunit) eq "yes") { + delete($$args_ref{'unit'}); + } + #sig fig don't make much sense either + if (($Apache::lonhomework::type eq 'exam' || + &Apache::response::submitted('scantron')) && + $tag eq 'numericalresponse') { + delete($$args_ref{'sig'}); + } + + if ($tag eq 'formularesponse') { + $$args_ref{'type'}='fml'; + } elsif ($tag eq 'numericalresponse') { + $$args_ref{'type'}='float'; + } + my @answer=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval); + &Apache::lonxml::debug('answer is'.join(':',@answer)); + @{$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=@answer; + + my ($result,@msgs) = + &Apache::run::run("&caparesponse_check_list()",$safeeval); + &Apache::lonxml::debug('msgs are'.join(':',@msgs)); + my ($awards)=split(/:/,$result); + my @awards= split(/,/,$awards); + return(\@awards,\@msgs); +} + sub end_numericalresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $increment=1; @@ -131,13 +171,13 @@ sub end_numericalresponse { if (!$Apache::lonxml::default_homework_loaded) { &Apache::lonxml::default_homework_load($safeeval); } + my $partid = $Apache::inputtags::part; + my $id = $Apache::inputtags::response[-1]; my $tag; + $safeeval->share_from('capa',['&caparesponse_capa_check_answer']); if (scalar(@$tagstack)) { $tag=$$tagstack[-1]; } - if ( $target eq 'grade' && defined($ENV{'form.submitted'})) { + if ( $target eq 'grade' && &Apache::response::submitted() ) { &Apache::response::setup_params($tag,$safeeval); - $safeeval->share_from('capa',['&caparesponse_capa_check_answer']); - my $partid = $Apache::inputtags::part; - my $id = $Apache::inputtags::response['-1']; if ($Apache::lonhomework::type eq 'exam' && $tag eq 'formularesponse') { $increment=&Apache::response::scored_response($partid,$id); @@ -149,56 +189,21 @@ sub end_numericalresponse { &Apache::lonxml::debug("submitted a $response
\n"); &Apache::lonxml::debug($$parstack[-1] . "\n
"); - if ($ENV{'form.submitted'} eq 'scantron') { + if ( &Apache::response::submitted('scantron')) { my $number_of_bubbles = &Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.numbubbles'); if (!$number_of_bubbles) { $number_of_bubbles=8; } my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval); my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval); my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,$safeeval); - my @values=&make_numerical_bubbles($number_of_bubbles,$target,$answers[0],$formats[0],\@incorrect); - $response=$values[$response]; + if ($#incorrect eq 0) { @incorrect=(split(/,/,$incorrect[0])); } + my ($values,$display)=&make_numerical_bubbles($number_of_bubbles,$target,$answers[0],$formats[0],\@incorrect,$safeeval); + $response=$values->[$response]; } $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; - my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')}; - $$args_ref{'response'}=$response; - my $hideunit=&Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.turnoffunit'); - - foreach my $arg ('type','tol','sig','ans_fmt','unit','calc', - 'samples') { - $$args_ref{$arg}= - &Apache::lonxml::get_param($arg,$parstack,$safeeval); - } - foreach my $key (keys(%Apache::inputtags::params)) { - $$args_ref{$key}=$Apache::inputtags::params{$key}; - } - - #no way to enter units, with radio buttons - if ($Apache::lonhomework::type eq 'exam' || - lc($hideunit) eq "yes") { - delete($$args_ref{'unit'}); - } - #sig fig don't make much sense either - if (($Apache::lonhomework::type eq 'exam' || - $ENV{'form.submitted'} eq 'scantron') && - $tag eq 'numericalresponse') { - delete($$args_ref{'sig'}); - } - - if ($tag eq 'formularesponse') { - $$args_ref{'type'}='fml'; - } elsif ($tag eq 'numericalresponse') { - $$args_ref{'type'}='float'; - } - my @answer=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval); - &Apache::lonxml::debug('answer is'.join(':',@answer)); - @{$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=@answer; - - ($result,my @msgs) = - &Apache::run::run("&caparesponse_check_list()",$safeeval); - &Apache::lonxml::debug('msgs are'.join(':',@msgs)); - my ($awards)=split(/:/,$result); - my (@awards) = split(/,/,$awards); - ($ad,my $msg) = &Apache::inputtags::finalizeawards(\@awards,\@msgs); + my ($awards,$msgs)=&check_submission($response,$partid,$id, + $tag,$parstack,$safeeval); + + ($ad,my $msg) = &Apache::inputtags::finalizeawards($awards,$msgs); &Apache::lonxml::debug('ad is'.$ad); if ($ad eq 'SIG_FAIL') { my ($sig_u,$sig_l)= @@ -208,6 +213,11 @@ sub end_numericalresponse { $Apache::inputtags::params{'sig'}); } &Apache::lonxml::debug("\n
result:$result:$Apache::lonxml::curdepth
\n"); + if ($Apache::lonhomework::type eq 'survey' && + ($ad eq 'INCORRECT' || $ad eq 'APPROX_ANS' || + $ad eq 'EXACT_ANS')) { + $ad='SUBMITTED'; + } &Apache::response::handle_previous(\%previous,$ad); $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; $Apache::lonhomework::results{"resource.$partid.$id.awardmsg"}=$msg; @@ -220,8 +230,6 @@ sub end_numericalresponse { my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"}; my $status = $Apache::inputtags::status['-1']; if ($Apache::lonhomework::type eq 'exam') { - my $partid=$Apache::inputtags::part; - my $id=$Apache::inputtags::response[-1]; my $number_of_bubbles = &Apache::lonnet::EXT('resource.'.$partid.'_'.$id.'.numbubbles'); if ($Apache::inputtags::params{'numbubbles'}) { $number_of_bubbles = $Apache::inputtags::params{'numbubbles'}; @@ -233,9 +241,11 @@ sub end_numericalresponse { my $unit=&Apache::lonxml::get_param_var('unit',$parstack, $safeeval); my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,$safeeval); - my @bubble_values=&make_numerical_bubbles($number_of_bubbles, - $target,$answers[0], - $formats[0],\@incorrect); + if ($#incorrect eq 0) { @incorrect=(split(/,/,$incorrect[0])); } + my ($bubble_values,$bubble_display)= + &make_numerical_bubbles($number_of_bubbles, + $target,$answers[0], + $formats[0],\@incorrect,$safeeval); my @alphabet=('A'..'Z'); if ($target eq 'web') { if ($tag eq 'numericalresponse') { @@ -244,13 +254,13 @@ sub end_numericalresponse { my $previous=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.$id.submission"}; for (my $ind=0;$ind<$number_of_bubbles;$ind++) { my $checked=''; - if ($previous eq $bubble_values[$ind]) { + if ($previous eq $bubble_values->[$ind]) { $checked=" checked='on' "; } $result.=''.$alphabet[$ind].': '. - $bubble_values[$ind].''; + $bubble_display->[$ind].''; } $result.=''; } elsif ($tag eq 'formularesponse') { @@ -264,7 +274,7 @@ sub end_numericalresponse { } if ($tag eq 'numericalresponse') { my ($celllength,$number_of_tables,@table_range)= - &get_table_sizes($number_of_bubbles,\@bubble_values); + &get_table_sizes($number_of_bubbles,$bubble_display); my $j=0; my $cou=0; $result.='\vskip -1 mm \noindent \begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]'; @@ -275,7 +285,7 @@ sub end_numericalresponse { } $result.='}'; for (my $ind=$cou;$ind<$cou+$table_range[$j];$ind++) { - $result.='\hskip -4 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$ & \hskip -3 mm {\small '.$bubble_values[$ind].'} '; + $result.='\hskip -4 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$ & \hskip -3 mm {\small '.$bubble_display->[$ind].'} '; if ($ind != $cou+$table_range[$j]-1) {$result.=' & ';} } $cou += $table_range[$j]; @@ -298,13 +308,15 @@ sub end_numericalresponse { } elsif ($target eq 'edit') { $result.=''.&Apache::edit::end_table; } elsif ($target eq 'answer' || $target eq 'analyze') { - - my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]"; + my $part_id="$partid.$id"; if ($target eq 'analyze') { push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id); $Apache::lonhomework::analyze{"$part_id.type"} = $tag; my (@incorrect)=&Apache::lonxml::get_param_var('incorrect',$parstack,$safeeval); + if ($#incorrect eq 0) { @incorrect=(split(/,/,$incorrect[0])); } push (@{ $Apache::lonhomework::analyze{"$part_id.incorrect"} }, @incorrect); + &Apache::response::check_if_computed($token,$parstack, + $safeeval,'answer'); } if (scalar(@$tagstack)) { &Apache::response::setup_params($tag,$safeeval); @@ -331,16 +343,19 @@ sub end_numericalresponse { } if ($fmt && $tag eq 'numericalresponse') { $fmt=~s/e/E/g; - $ans = sprintf('%.'.$fmt,$ans); - if ($high) { - $high=sprintf('%.'.$fmt,$high); - $low =sprintf('%.'.$fmt,$low); - } + if ($unit=~/\$/) { $fmt="\$".$fmt; $unit=~s/\$//g; } + if ($unit=~/\,/) { $fmt="\,".$fmt; $unit=~s/\,//g; } + $ans = &format_number($ans,$fmt,$target,$safeeval); + #if ($high) { + # $high=&format_number($high,$fmt,$target,$safeeval); + # $low =&format_number($low,$fmt,$target,$safeeval); + #} } + my $response=$ans; if ($target eq 'answer') { if ($high && $tag eq 'numericalresponse') { $ans.=' ['.$low.','.$high.']'; } if (defined($sighigh) && $tag eq 'numericalresponse') { - if ($ENV{'form.answer_output_mode'} eq 'tex') { + if ($env{'form.answer_output_mode'} eq 'tex') { $ans.= " Sig $siglow - $sighigh"; } else { $ans.= " Sig $siglow - $sighigh"; @@ -353,12 +368,21 @@ sub end_numericalresponse { push (@{ $Apache::lonhomework::analyze{"$part_id.ans_high"} }, $high); push (@{ $Apache::lonhomework::analyze{"$part_id.ans_low"} }, $low); } + if ($fmt) { + push (@{ $Apache::lonhomework::analyze{"$part_id.format"} }, $fmt); + } + } + my ($awards,$msgs)=&check_submission($response,$partid,$id,$tag, + $parstack,$safeeval); + my ($ad,$msg) =&Apache::inputtags::finalizeawards($awards,$msgs); + if ($ad ne 'EXACT_ANS' && $ad ne 'APPROX_ANS') { + &Apache::lonxml::error(&mt('Computer\'s answer is incorrect ("[_1]"). It is likely that the tolerance range ("[_2]" to "[_3]") or significant figures ("[_4]" to "[_5]") needs to be adjusted',$response,$low,$high,$siglow,$sighigh)); } } if (defined($unit) and ($unit ne '') and $tag eq 'numericalresponse') { if ($target eq 'answer') { - if ($ENV{'form.answer_output_mode'} eq 'tex') { + if ($env{'form.answer_output_mode'} eq 'tex') { $result.=&Apache::response::answer_part($tag, " Unit: $unit "); } else { @@ -391,7 +415,7 @@ sub get_table_sizes { my $cell_width=0; foreach my $member (@$rbubble_values) { my $cell_width_real=0; - if ($member=~/(\+|-)?(\d*)\.?(\d*)\s*\$\\times\s*10\^{(\+|-)?(\d+)}\$/) { + if ($member=~/(\+|-)?(\d*)\.?(\d*)\s*\$?\\times\s*10\^{(\+|-)?(\d+)}\$?/) { $cell_width_real=(length($2)+length($3)+length($5)+7)*$scale; } elsif ($member=~/(\d*)\.?(\d*)(E|e)(\+|-)?(\d*)/) { $cell_width_real=(length($1)+length($2)+length($5)+9)*$scale; @@ -404,15 +428,17 @@ sub get_table_sizes { } $cell_width+=8; my $textwidth; - if ($ENV{'form.textwidth'} ne '') { - $ENV{'form.textwidth'}=~/(\d*)\.?(\d*)/; + if ($env{'form.textwidth'} ne '') { + $env{'form.textwidth'}=~/(\d*)\.?(\d*)/; $textwidth=$1.'.'.$2; } else { - $ENV{'textwidth'}=~/(\d+)\.?(\d*)/; + $env{'form.textwidth'}=~/(\d+)\.?(\d*)/; $textwidth=$1.'.'.$2; } my $bubbles_per_line=int($textwidth/$cell_width); - if (($bubbles_per_line > $number_of_bubbles/2) && ($number_of_bubbles % 2==0)) {$bubbles_per_line=$number_of_bubbles/2;} + if ($bubbles_per_line > $number_of_bubbles) { + $bubbles_per_line=$number_of_bubbles; + }elsif (($bubbles_per_line > $number_of_bubbles/2) && ($number_of_bubbles % 2==0)) {$bubbles_per_line=$number_of_bubbles/2;} my $number_of_tables = int($number_of_bubbles/$bubbles_per_line); my @table_range = (); for (my $i=0;$i<$number_of_tables;$i++) {push @table_range,$bubbles_per_line;} @@ -426,13 +452,9 @@ sub get_table_sizes { } sub format_number { - my ($number,$format,$target)=@_; + my ($number,$format,$target,$safeeval)=@_; my $ans; - if ($format ne '') { - $format=~s/e/E/g; - $ans = sprintf('%.'.$format,$number); - } else { - my $format = ''; + if ($format eq '') { #What is the number? (integer,decimal,floating point) if ($number=~/^(\d*\.?\d*)(E|e)(\d*)$/) { $format = '3e'; @@ -441,23 +463,17 @@ sub format_number { } elsif ($number=~/^(\d*)$/) { $format = 'd'; } - $ans = sprintf('%.'.$format,$number); } - if ($target eq 'tex') { - if ($ans =~ m/([0-9\.\-\+]+)E([0-9\-\+]+)/ ) { - my $number = $1; - my $power = $2; - $power=~s/^\+//; - $power=~s/^(-?)0+(\d+)/$1$2/; - $ans=$number.'$\times 10^{'.$power.'}$'; #'stupidemacs - } + if (!$Apache::lonxml::default_homework_loaded) { + &Apache::lonxml::default_homework_load($safeeval); } + $ans=&Apache::run::run("&prettyprint(q\0$number\0,q\0$format\0,q\0$target\0)",$safeeval); return $ans; } sub make_numerical_bubbles { - my ($number_of_bubbles,$target,$answer,$format,$incorrect) =@_; - my @bubble_values = (); + my ($number_of_bubbles,$target,$answer,$format,$incorrect,$safeeval) =@_; + my @bubble_values=(); &Apache::lonxml::debug("answer is $answer incorrect is $incorrect"); my @oldseed=&Math::Random::random_get_seed(); if (defined($incorrect) && ref($incorrect)) { @@ -472,15 +488,19 @@ sub make_numerical_bubbles { &Apache::lonxml::debug("Answer was :$answer: returning :".$#bubble_values.": whih are :".join(':',@bubble_values)); &Math::Random::random_set_seed(@oldseed); if (defined($format) && $format ne '') { + my @bubble_display; foreach my $value (@bubble_values) { - $value=&format_number($value,$format,$target); + push(@bubble_display, + &format_number($value,$format,$target,$safeeval)); } + return (\@bubble_values,\@bubble_display); + } else { + return (\@bubble_values,\@bubble_values); } - return @bubble_values; } if (defined($$incorrect[0]) && scalar(@$incorrect)+1 < $number_of_bubbles) { - &Apache::lonxml::warning("Not enough incorrect answers were specified in the incorrect array, ignoring the specified incorrect answers and instead generating them."); + &Apache::lonxml::warning("Not enough incorrect answers were specified in the incorrect array, ignoring the specified incorrect answers and instead generating them (".join(',',@$incorrect).")."); } } my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors @@ -490,14 +510,15 @@ sub make_numerical_bubbles { my $power = $powers[$ind]; $ind=&Math::Random::random_uniform_integer(1,0,$#factors); my $factor = $factors[$ind]; + my @bubble_display; for ($ind=0;$ind<$number_of_bubbles;$ind++) { $bubble_values[$ind] = $answer*($factor**($power-$powers[$#powers-$ind])); - $bubble_values[$ind] = &format_number($bubble_values[$ind], - $format,$target); + $bubble_display[$ind] = &format_number($bubble_values[$ind], + $format,$target,$safeeval); } &Math::Random::random_set_seed(@oldseed); - return @bubble_values; + return (\@bubble_values,\@bubble_display); } sub get_tolrange { @@ -518,8 +539,8 @@ sub get_tolrange { sub get_sigrange { my ($sig)=@_; &Apache::lonxml::debug("Got a sig of :$sig:"); - my $courseid=$ENV{'request.course.id'}; - if (lc($ENV{"course.$courseid.disablesigfigs"}) eq 'yes') { + my $courseid=$env{'request.course.id'}; + if (lc($env{"course.$courseid.disablesigfigs"}) eq 'yes') { return (15,0); } my $sig_lbound; @@ -539,7 +560,7 @@ sub get_sigrange { ($sig_lbound > 15) || ($sig =~/(\+|-)/ ) ) { my $errormsg=&mt("Invalid Significant figures detected")." ($sig)"; - if ($ENV{'request.state'} eq 'construct') { + if ($env{'request.state'} eq 'construct') { $errormsg.= &Apache::loncommon::help_open_topic('Significant_Figures'); } @@ -561,6 +582,8 @@ sub start_stringresponse { [['cs','Case Sensitive'],['ci','Case Insensitive'], ['mc','Case Insensitive, Any Order'], ['re','Regular Expression']],$token); + $result.=&Apache::edit::text_arg('String to display for answer:', + 'answerdisplay',$token); $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row(); } elsif ($target eq 'modified') { my $constructtag; @@ -573,8 +596,13 @@ sub start_stringresponse { } } elsif ($target eq 'web') { if ( &Apache::response::show_answer() ) { - $Apache::inputtags::answertxt{$id}= - &Apache::lonxml::get_param('answer',$parstack,$safeeval); + my $answer= + &Apache::lonxml::get_param('answerdisplay',$parstack,$safeeval); + if (!defined $answer || $answer eq '') { + $answer= + &Apache::lonxml::get_param('answer',$parstack,$safeeval); + } + $Apache::inputtags::answertxt{$id}=$answer; } } elsif ($target eq 'answer' || $target eq 'grade') { &Apache::response::reset_params(); @@ -595,11 +623,11 @@ sub end_stringresponse { if (!$Apache::lonxml::default_homework_loaded) { &Apache::lonxml::default_homework_load($safeeval); } - if ( $target eq 'grade' && defined($ENV{'form.submitted'})) { + if ( $target eq 'grade' && &Apache::response::submitted() ) { &Apache::response::setup_params('stringresponse',$safeeval); $safeeval->share_from('capa',['&caparesponse_capa_check_answer']); if ($Apache::lonhomework::type eq 'exam' || - $ENV{'form.submitted'} eq 'scantron') { + &Apache::response::submitted('scantron')) { $increment=&Apache::response::scored_response($part,$id); } else { my $response = &Apache::response::getresponse(); @@ -643,6 +671,11 @@ sub end_stringresponse { ($ad,$msg) = &Apache::inputtags::finalizeawards(\@awards,\@msgs); &Apache::lonxml::debug("\n
result:$result:$Apache::lonxml::curdepth
\n"); } + if ($Apache::lonhomework::type eq 'survey' && + ($ad eq 'INCORRECT' || $ad eq 'APPROX_ANS' || + $ad eq 'EXACT_ANS')) { + $ad='SUBMITTED'; + } &Apache::response::handle_previous(\%previous,$ad); $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad; $Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=$msg; @@ -665,6 +698,8 @@ sub end_stringresponse { if ($target eq 'analyze') { push (@{ $Apache::lonhomework::analyze{"parts"} },"$part.$id"); $Apache::lonhomework::analyze{"$part.$id.type"} = 'stringresponse'; + &Apache::response::check_if_computed($token,$parstack,$safeeval, + 'answer'); } &Apache::response::setup_params('stringresponse',$safeeval); if ($target eq 'answer') { @@ -689,7 +724,7 @@ sub end_stringresponse { $string='Regular Expression'; } if ($target eq 'answer') { - if ($ENV{'form.answer_output_mode'} eq 'tex') { + if ($env{'form.answer_output_mode'} eq 'tex') { $result.=&Apache::response::answer_part('stringresponse', "$string"); } else {