Annotation of loncom/homework/caparesponse/caparesponse.pm, revision 1.92

1.3       albertel    1: # The LearningOnline Network with CAPA
                      2: # caparesponse definition
1.47      albertel    3: #
1.92    ! albertel    4: # $Id: caparesponse.pm,v 1.91 2003/04/08 04:00:23 albertel Exp $
1.47      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.3       albertel   28: 
                     29: package Apache::caparesponse;
                     30: use strict;
1.4       albertel   31: use capa;
1.3       albertel   32: 
1.50      harris41   33: BEGIN {
1.89      albertel   34:     &Apache::lonxml::register('Apache::caparesponse',('caparesponse','numericalresponse','stringresponse','formularesponse'));
1.3       albertel   35: }
                     36: 
1.89      albertel   37: sub start_numericalresponse {
                     38:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                     39:     my $id = &Apache::response::start_response($parstack,$safeeval);
                     40:     my $result;
                     41:     if ($target eq 'edit') {
                     42: 	$result.=&Apache::edit::tag_start($target,$token);
                     43: 	$result.=&Apache::edit::text_arg('Answer:','answer',$token);
                     44: 	if ($token->[1] eq 'numericalresponse') {
                     45: 	    $result.=&Apache::edit::text_arg('Unit:','unit',$token,5).
                     46: 		&Apache::loncommon::help_open_topic('Physical_Units');
                     47: 	    $result.=&Apache::edit::text_arg('Format:','format',$token,4).
                     48: 		&Apache::loncommon::help_open_topic('Numerical_Response_Format');
                     49: 	} elsif ($token->[1] eq 'stringresponse') {
                     50: 	    $result.=&Apache::edit::select_arg('Type:','type',
                     51: 			 [['cs','Case Sensitive'],['ci','Case Insensitive'],
                     52: 			  ['mc','Case Insensitive, Any Order']],$token);
                     53: 	} elsif ($token->[1] eq 'formularesponse') {
                     54: 	    $result.=&Apache::edit::text_arg('Sample Points:','samples',
                     55: 					     $token,40).
                     56: 	      &Apache::loncommon::help_open_topic('Formula_Response_Sampling');
                     57: 	}
                     58: 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                     59:     } elsif ($target eq 'modified') {
                     60: 	my $constructtag;
                     61: 	if ($token->[1] eq 'numericalresponse') {
                     62: 	    $constructtag=&Apache::edit::get_new_args($token,$parstack,
                     63: 						      $safeeval,'answer',
                     64: 						      'unit','format');
                     65: 	} elsif ($token->[1] eq 'stringresponse') {
                     66: 	    $constructtag=&Apache::edit::get_new_args($token,$parstack,
                     67: 						      $safeeval,'answer',
                     68: 						      'type');
                     69: 	} elsif ($token->[1] eq 'formularesponse') {
                     70: 	    $constructtag=&Apache::edit::get_new_args($token,$parstack,
                     71: 						      $safeeval,'answer',
                     72: 						      'samples');
                     73: 	}
                     74: 	if ($constructtag) {
                     75: 	    $result = &Apache::edit::rebuild_tag($token);
                     76: 	    $result.=&Apache::edit::handle_insert();
1.22      albertel   77: 	}
1.89      albertel   78:     } elsif ($target eq 'meta') {
                     79: 	$result=&Apache::response::meta_package_write('numericalresponse');
                     80:     } elsif ($target eq 'answer' || $target eq 'grade') {
                     81: 	&Apache::response::reset_params();
1.16      albertel   82:     }
1.89      albertel   83:     return $result;
1.21      albertel   84: }
                     85: 
1.89      albertel   86: sub end_numericalresponse {
                     87:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.90      albertel   88:     my $increment=1;
1.89      albertel   89:     my $result = '';
                     90:     if (!$Apache::lonxml::default_homework_loaded) {
                     91: 	&Apache::lonxml::default_homework_load($safeeval);
1.34      albertel   92:     }
1.90      albertel   93:     if ( $target eq 'grade' && defined $ENV{'form.submitted'}) {
                     94: 	&Apache::response::setup_params($$tagstack[-1]);
                     95: 	$safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
                     96: 	my $partid = $Apache::inputtags::part;
                     97: 	my $id = $Apache::inputtags::response['-1'];
                     98: 	my $response = &Apache::response::getresponse();
                     99: 	if ( $response =~ /[^\s]/) {
                    100: 	    my $ad;
                    101: 	    my %previous = &Apache::response::check_for_previous($response,$partid,$id);
                    102: 	    $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response;
                    103: 	    &Apache::lonxml::debug("submitted a $response<br>\n");
1.92    ! albertel  104: 	    &Apache::lonxml::debug($$parstack[-1] . "\n<br>");
1.90      albertel  105: 
                    106: 	    if ($ENV{'form.submitted'} eq 'scantron') {
1.92    ! albertel  107: 		my $number_of_bubbles = 8;#default values for number of bubbles
        !           108: 		my (@formats)=&Apache::lonxml::get_param_var('format',
        !           109: 							 $parstack,$safeeval);
        !           110: 		my (@answers)=&Apache::lonxml::get_param_var('answer',
        !           111: 							 $parstack,$safeeval);
        !           112: 		my @values=&make_numerical_bubbles($number_of_bubbles,$target,
        !           113: 						   $answers[0],$formats[0]);
        !           114: 		$response=$values[$response];
        !           115: 	    } else {
        !           116: 		$response =~ s/\\/\\\\/g;
        !           117: 		$response =~ s/\'/\\\'/g;
1.90      albertel  118: 	    }
                    119: 	    &Apache::lonxml::debug("current $response");
                    120: 	    my $expression="&caparesponse_check_list('".$response."','".
                    121: 		$$parstack[-1];
1.92    ! albertel  122: 	    #no way to enter units, with radio buttons
        !           123: 	    if ($Apache::lonhomework::type eq 'exam') {
        !           124: 		$expression.=';my $unit=undef;';
        !           125: 	    }
1.90      albertel  126: 	    foreach my $key (keys(%Apache::inputtags::params)) {
                    127: 		$expression.= ';my $'. #'
                    128: 		    $key.'="'.$Apache::inputtags::params{$key}.'"';
                    129: 	    }
                    130: 	    if ($$tagstack[-1] eq 'formularesponse') {
                    131: 		$expression.=';my $type="fml";';
                    132: 	    } elsif ($$tagstack[-1] eq 'numericalresponse') {
                    133: 		$expression.=';my $type="float";';
                    134: 	    }
                    135: 	    $expression.="');";
                    136: 	    $result = &Apache::run::run($expression,$safeeval);
                    137: 	    my ($awards) = split /:/ , $result;
                    138: 	    ($ad) = &Apache::inputtags::finalizeawards(split /,/ , $awards);
                    139: 	    &Apache::lonxml::debug("$expression");
                    140: 	    &Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");
                    141: 	    &Apache::response::handle_previous(\%previous,$ad);
                    142: 	    $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
                    143: 	    $result='';
1.89      albertel  144: 	}
                    145:     } elsif ($target eq 'web' || $target eq 'tex') {
1.90      albertel  146: 	my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,
                    147: 						     $safeeval);
1.89      albertel  148: 	my $award = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                    149: 	my $status = $Apache::inputtags::status['-1'];
                    150: 	if ($award =~ /^correct/ || $status eq "SHOW_ANSWER" ) {
                    151: 	    my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,
                    152: 							 $safeeval);
                    153: 	    my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
                    154: 						    $safeeval);
                    155: 	    if ($target eq 'web') {
                    156: 		$result="<br />The correct answer is ";
                    157: 	    } elsif ($target eq 'tex') {
                    158: 		#$result='\vskip 0 mm The correct answer is \\texttt{';
                    159: 	    }
                    160: 	    for (my $i=0; $i <= $#answers; $i++) {
                    161: 		my $answer=$answers[$i];
                    162: 		my $format;
                    163: 		if ($#formats > 0) {
                    164: 		    $format=$formats[$i];
                    165: 		} else {
                    166: 		    $format=$formats[0];
                    167: 		}
                    168: 		my $formatted;
                    169: 		if ((defined($format)) && ($format ne '')) {
                    170: 		    &Apache::lonxml::debug("formatting with :$format: answer :$answer:");
                    171: 		    $formatted=sprintf('%.'.$format,$answer).',';
                    172: 		} else {
                    173: 		    &Apache::lonxml::debug("no format answer :$answer:");
                    174: 		    $formatted="$answer,";
                    175: 		}
                    176: 		
                    177: 		if ($target eq 'tex') {
                    178: 		    $formatted='';
                    179: 		    #$formatted=&Apache::lonxml::latex_special_symbols($formatted);
                    180: 		}
                    181: 		$result.=$formatted;
                    182: 	    }
                    183: 	    chop $result;
                    184: 	    if ($target eq 'web') {
                    185: 		$result.=" $unit.<br />";
                    186: 	    } elsif ($target eq 'tex') {
                    187: 		#$result.=&Apache::lonxml::latex_special_symbols($unit);
                    188: 		#$result.="}. \\vskip 0 mm ";
                    189: 	    }
                    190: 	}
                    191: 	if ($Apache::lonhomework::type eq 'exam') {
1.90      albertel  192: 	    my $number_of_bubbles = 8; #default values for number of bubbles
1.89      albertel  193: 	    my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,
                    194: 							 $safeeval);
                    195: 	    my $unit=&Apache::lonxml::get_param_var('unit',$parstack,
                    196: 						    $safeeval);
1.90      albertel  197: 	    my @bubble_values=&make_numerical_bubbles($number_of_bubbles,
1.91      albertel  198: 						      $target,$answers[0],
                    199: 						      $formats[0]);
1.89      albertel  200: 	    my @alphabet=('A'..'Z');
1.90      albertel  201: 	    my $id=$Apache::inputtags::response[-1];
1.89      albertel  202: 	    if ($target eq 'web') {
                    203: 		if ($$tagstack[-1] eq 'numericalresponse') {
                    204: 		    if ($unit=~/\S/) {$result.=' (in '.$unit.')<br /><br />';}
                    205: 		    $result.= '<table border="1"><tr>';
1.90      albertel  206: 		    for (my $ind=0;$ind<$number_of_bubbles;$ind++) {
                    207: 			$result.='<td><input type="radio" name="HWVAL_'.$id.
1.91      albertel  208: 			    '" value="'.$bubble_values[$ind].'"><b>'.
                    209: 				$alphabet[$ind].'</b>: '.
                    210: 				    $bubble_values[$ind].'</td>';
1.89      albertel  211: 		    }
                    212: 		    $result.='</tr></table>';
                    213: 		} elsif ($$tagstack[-1] eq 'formularesponse') {
1.90      albertel  214: 		    $result.= '<br /><br /><font color="red">
                    215:                            <textarea name="HWVAL_'.$id.'" rows="4" cols="50">
                    216:                            </textarea></font> <br /><br />';
1.89      albertel  217: 		}
                    218: 	    } elsif ($target eq 'tex') {
                    219: 		if (defined $unit and $Apache::lonhomework::type eq 'exam') {
                    220: 		    $result.=' \textit{(in} \verb|'.$unit.'|\textit{)} ';
                    221: 		}
                    222: 		if ($$tagstack[-1] eq 'numericalresponse') {
1.90      albertel  223: 		    my ($celllength,$number_of_tables,@table_range)=
                    224: 			&get_table_sizes($formats[0],$number_of_bubbles);
1.89      albertel  225: 		    my $j=0;
                    226: 		    my $cou=0;
                    227: 		    $result.='\vskip -1 mm \noindent \begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]';
                    228: 		    for (my $i=0;$i<$number_of_tables;$i++) {
                    229: 			$result.='\vskip -1 mm \noindent \begin{tabular}{';
1.90      albertel  230: 			for (my $ind=0;$ind<$table_range[$j];$ind++) {
1.89      albertel  231: 			    $result.='lp{'.$celllength.' mm}';
                    232: 			}
                    233: 			$result.='}';
1.90      albertel  234: 			for (my $ind=$cou;$ind<$cou+$table_range[$j];$ind++) {
1.91      albertel  235: 			    $result.='\hskip -3 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$\hskip -2 mm & {\small '.$bubble_values[$ind].'} ';
1.89      albertel  236: 			    if ($ind != $cou+$table_range[$j]-1) {$result.=' & ';}
                    237: 			}
                    238: 			$cou += $table_range[$j];
                    239: 			$j++;
                    240: 			$result.='\\\\\end{tabular}\vskip 0 mm ';
                    241: 		    }
                    242: 		    $result.='\end{enumerate}';
                    243: 		} else {
                    244: 		    $result.='\fbox{\fbox{\parbox{\textwidth-5mm}{\strut\\\\\strut\\\\\strut\\\\\strut\\\\}}}';
                    245: 		    my $id = $Apache::inputtags::part;
                    246: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    247: 		    my $repetition = int $weight/9;
                    248: 		    if ($weight % 9 != 0) {$repetition++;}
                    249: 		    $result.='\begin{enumerate}';
                    250: 		    for (my $i=0;$i<$repetition;$i++) {
                    251: 			$result.='\item[\textbf{'.$Apache::lonxml::counter.'}.]\textit{Leave blank on scoring form}\vskip 0 mm';
                    252: 		    }
1.90      albertel  253: 		    $increment=$repetition;
1.89      albertel  254: 		    $result.= '\end{enumerate}';
                    255: 		}
                    256: 	    }
                    257: 	}
                    258:     } elsif ($target eq 'edit') {
                    259: 	$result.='</td></tr>'.&Apache::edit::end_table;
                    260:     } elsif ($target eq 'answer' || $target eq 'analyze') {
1.58      sakharuk  261: 	
1.89      albertel  262: 	my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
                    263: 	if ($target eq 'analyze') {
                    264: 	    push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
                    265: 	    $Apache::lonhomework::analyze{"$part_id.type"} = $$tagstack[-1];
                    266: 	}
                    267: 	&Apache::response::setup_params($$tagstack[-1]);
                    268: 	my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval);
1.58      sakharuk  269: 	my (@formats)=&Apache::lonxml::get_param_var('format',$parstack,$safeeval);
                    270: 	my $unit=&Apache::lonxml::get_param_var('unit',$parstack,$safeeval);
1.89      albertel  271: 	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval);
                    272: 	
                    273: 	if ($target eq 'answer') {
                    274: 	    $result.=&Apache::response::answer_header($$tagstack[-1]);
                    275: 	}
                    276: 	for(my $i=0;$i<=$#answers;$i++) {
                    277: 	    my $ans=$answers[$i];
1.90      albertel  278: 	    my $fmt=$formats[0];
                    279: 	    if (@formats && $#formats) {$fmt=$formats[$i];}
1.89      albertel  280: 	    my ($high,$low);
                    281: 	    if ($Apache::inputtags::params{'tol'}) {
                    282: 		($high,$low)=&get_tolrange($ans,$Apache::inputtags::params{'tol'});
                    283: 	    }
                    284: 	    my ($sighigh,$siglow);
                    285: 	    if ($Apache::inputtags::params{'sig'}) {
                    286: 		($sighigh,$siglow)=&get_sigrange($Apache::inputtags::params{'sig'});
                    287: 	    }
                    288: 	    if ($fmt) {
                    289: 		$ans = sprintf('%.'.$fmt,$ans);
                    290: 		if ($high) {
1.90      albertel  291: 		    $high=sprintf('%.'.$fmt,$high);
                    292: 		    $low =sprintf('%.'.$fmt,$low);
1.62      sakharuk  293: 		}
1.60      sakharuk  294: 	    }
1.89      albertel  295: 	    if ($target eq 'answer') {
                    296: 		if ($high) { $ans.=' ['.$low.','.$high.']'; }
                    297: 		if ($sighigh) { $ans.= " Sig <i>$siglow - $sighigh</i>"; }
                    298: 		$result.=&Apache::response::answer_part($$tagstack[-1],$ans);
                    299: 	    } elsif ($target eq 'analyze') {
                    300: 		push (@{ $Apache::lonhomework::analyze{"$part_id.answer"} }, $ans);
                    301: 		if ($high) {
                    302: 		    push (@{ $Apache::lonhomework::analyze{"$part_id.ans_high"} }, $high);
                    303: 		    push (@{ $Apache::lonhomework::analyze{"$part_id.ans_low"} }, $low);
1.58      sakharuk  304: 		}
1.79      sakharuk  305: 	    }
1.36      albertel  306: 	}
1.89      albertel  307: 	if ($unit) {
                    308: 	    if ($target eq 'answer') {
                    309: 		$result.=&Apache::response::answer_part($$tagstack[-1],
                    310: 							"Unit: <b>$unit</b>");
                    311: 	    } elsif ($target eq 'analyze') {
                    312: 		push (@{ $Apache::lonhomework::analyze{"$part_id.unit"} },
                    313: 		      $unit);
                    314: 	    }
                    315: 	}
                    316: 	if ($type || $token->[1] eq 'stringresponse') {
                    317: 	    my $string='Case Insensitive';
                    318: 	    if ($type eq 'mc') {
                    319: 		$string='Multiple Choice';
                    320: 	    } elsif ($type eq 'cs') {
                    321: 		$string='Case Sensitive';
                    322: 	    } elsif ($type eq 'ci') {
                    323: 		$string='Case Insensitive';
                    324: 	    } elsif ($type eq 'fml') {
                    325: 		$string='Formula';
                    326: 	    }
                    327: 	    if ($target eq 'answer') {
                    328: 		$result.=&Apache::response::answer_part($$tagstack[-1],
                    329: 							'<b>'.$string.'</b>');
                    330: 	    } elsif ($target eq 'analyze') {
                    331: 		push (@{ $Apache::lonhomework::analyze{"$part_id.type"} },
                    332: 		      $type);
                    333: 	    }
                    334: 	}
                    335: 	if ($$tagstack[-1] eq 'formularesponse' && $target eq 'answer') {
                    336: 	    my $samples=&Apache::lonxml::get_param('samples',$parstack,$safeeval);
                    337: 	    $result.=&Apache::response::answer_part($$tagstack[-1],$samples);
                    338: 	}
                    339: 	if ($target eq 'answer') {
                    340: 	    $result.=&Apache::response::answer_footer($$tagstack[-1]);
                    341: 	}
1.69      sakharuk  342:     }
1.90      albertel  343:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    344: 	$target eq 'tex' || $target eq 'analyze') {
                    345: 	&Apache::lonxml::increment_counter($increment);
                    346:     }
1.89      albertel  347:     &Apache::response::end_response;
                    348:     return $result;
1.90      albertel  349: }
                    350: 
                    351: sub get_table_sizes {
                    352:     my ($format,$number_of_bubbles)=@_;
                    353:     my $max_val = 0;
                    354:     if ($format=~m/^(\d+)E([^\d]*)(\d*)$/) {
                    355: 	$max_val=$1+$2+4;
                    356:     } else {
                    357: 	$max_val=4;
                    358:     }
                    359:     $max_val = int(0.9*$ENV{'form.textwidth'}/(($max_val+6)*2));
                    360:     my $celllength = 0.9*$ENV{'form.textwidth'}/$max_val-10;
                    361:     my @table_range = ();
                    362:     my $number_of_tables = int($number_of_bubbles/$max_val);
                    363:     for (my $i=0;$i<$number_of_tables;$i++) {push @table_range,$max_val;}
                    364:     if ($number_of_bubbles % $max_val != 0) {
                    365: 	$number_of_tables++;
                    366: 	push @table_range,($number_of_bubbles % $max_val);
                    367:     }
                    368:     return ($celllength,$number_of_tables,@table_range);
                    369: }
                    370: 
                    371: sub format_number {
                    372:     my ($number,$format,$target)=@_;
                    373:     my $ans;
                    374:     if ($format ne '') {
                    375: 	$ans = sprintf('%.'.$format,$number);
                    376:     } else {
                    377: 	my $format = '';
                    378: 	#What is the number? (integer,decimal,floating point)
                    379: 	if ($number=~/^(\d*\.?\d*)(E|e)(\d*)$/) {
                    380: 	    $format = 'e'.$2;
                    381: 	} elsif ($number=~/^(\d*)\.(\d*)$/) {
                    382: 	    $format = '4f';
                    383: 	} elsif ($number=~/^(\d*)$/) {
                    384: 	    $format = 'd';
                    385: 	}
                    386: 	$ans = sprintf('%.'.$format,$number);
                    387:     }
                    388:     if ($target eq 'tex') {
                    389: 	if ($ans =~ m/([0-9\.\-\+]+)E([0-9\-\+]+)/ ) {
                    390: 	    my $number = $1;
                    391: 	    my $power = $2;
                    392: 	    $power=~s/^\+//;
                    393: 	    $power=~s/^(-?)0+(\d+)//;
                    394: 	    $ans=$number.'$\times 10^{'.$1.$2.'}$'; #'stupidemacs
                    395: 	}
                    396:     }
                    397:     return $ans;
                    398: }
                    399: 
                    400: sub make_numerical_bubbles {
1.91      albertel  401:     my ($number_of_bubbles,$target,$answer,$format) =@_;
                    402:     my @bubble_values = ();
1.90      albertel  403:     my @factors = (1.13,1.17,1.25,1.33,1.45); #default values of factors
                    404:     my @powers = (1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0); #default values for powers
                    405:     &Apache::response::setrandomnumber();
                    406:     my $ind=&Math::Random::random_uniform_integer(1,0,$#powers);
                    407:     my $power = $powers[$ind];
                    408:     $ind=&Math::Random::random_uniform_integer(1,0,$#factors);
                    409:     my $factor = $factors[$ind];
                    410:     for ($ind=0;$ind<$number_of_bubbles;$ind++) {
1.91      albertel  411: 	$bubble_values[$ind] = $answer*($factor**($power-$powers[$#powers-$ind]));
                    412: 	$bubble_values[$ind] = &format_number($bubble_values[$ind],
                    413: 					       $format,$target);
                    414: 
1.90      albertel  415:     }
1.91      albertel  416:     return @bubble_values;
1.51      albertel  417: }
                    418: 
                    419: sub get_tolrange {
1.89      albertel  420:     my ($ans,$tol)=@_;
                    421:     my ($high,$low);
                    422:     if ($tol =~ /%$/) {
                    423: 	chop($tol);
                    424: 	my $change=$ans*($tol/100.0);
                    425: 	$high=$ans+$change;
                    426: 	$low=$ans-$change;
                    427:     } else {
                    428: 	$high=$ans+$tol;
                    429: 	$low=$ans-$tol;
                    430:     }
                    431:     return ($high,$low);
1.52      albertel  432: }
                    433: 
                    434: sub get_sigrange {
1.89      albertel  435:     my ($sig)=@_;
                    436:     &Apache::lonxml::debug("Got a sig of :$sig:");
                    437:     my $sig_lbound;
                    438:     my $sig_ubound;
                    439:     if ($sig eq '') {
                    440: 	$sig_lbound = 0; #SIG_LB_DEFAULT
                    441: 	$sig_ubound =15; #SIG_UB_DEFAULT
                    442:     } else {
                    443: 	($sig_lbound,$sig_ubound) = split(/,/,$sig);
                    444: 	if (!$sig_lbound) {
                    445: 	    $sig_lbound = 0; #SIG_LB_DEFAULT
                    446: 	    $sig_ubound =15; #SIG_UB_DEFAULT
                    447: 	}
                    448: 	if (!$sig_ubound) { $sig_ubound=$sig_lbound; }
1.52      albertel  449:     }
1.89      albertel  450:     return ($sig_ubound,$sig_lbound);
1.34      albertel  451: }
                    452: 
                    453: sub start_stringresponse {
1.89      albertel  454:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    455:     my $result;
                    456:     if ($target eq 'meta') {
                    457: 	$result=&Apache::response::meta_package_write('stringresponse');
                    458:     } else {
                    459: 	$result.=&start_numericalresponse(@_);
                    460:     }
                    461:     return $result;
1.34      albertel  462: }
                    463: 
                    464: sub end_stringresponse {
1.89      albertel  465:     return end_numericalresponse(@_);
1.44      albertel  466: }
                    467: 
                    468: sub start_formularesponse {
1.89      albertel  469:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    470:     my $result;
                    471:     if ($target eq 'meta') {
                    472: 	$result=&Apache::response::meta_package_write('formularesponse');
                    473:     } else {
                    474: 	$result.=&start_numericalresponse(@_);
                    475:     }
                    476:     return $result;
1.44      albertel  477: }
                    478: 
                    479: sub end_formularesponse {
1.89      albertel  480:     return end_numericalresponse(@_);
1.3       albertel  481: }
                    482: 
1.1       albertel  483: 1;
1.3       albertel  484: __END__
1.89      albertel  485: 

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