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Diff for /loncom/homework/radiobuttonresponse.pm between versions 1.154 and 1.155

version 1.154, 2012/01/20 13:26:34 version 1.155, 2012/02/10 00:26:42
Line 33  use HTML::Entities(); Line 33  use HTML::Entities();
 use Apache::lonlocal;  use Apache::lonlocal;
 use Apache::lonnet;  use Apache::lonnet;
 use Apache::response;  use Apache::response;
   use Apache::caparesponse;
   
 my $default_bubbles_per_line = 10;  my $default_bubbles_per_line = 10;
   my @alphabet      = ( 'A' .. 'Z' ); # Foil labels.
   
   
   
   
 BEGIN {  BEGIN {
     &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));      &Apache::lonxml::register('Apache::radiobuttonresponse',('radiobuttonresponse'));
 }  }
   
   #---------------------------------------------------------------------------
   #
   #  Generic utility subs.
   
 sub bubble_line_count {  sub bubble_line_count {
     my ($numfoils, $bubbles_per_line) = @_;      my ($numfoils, $bubbles_per_line) = @_;
     my $bubble_lines;      my $bubble_lines;
Line 53  sub bubble_line_count { Line 61  sub bubble_line_count {
 }  }
   
   
   
   #------------------------------------------------------------------------------
   #
   #  XML handlers.
 sub start_radiobuttonresponse {  sub start_radiobuttonresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;      my $result;
Line 90  sub start_radiobuttonresponse { Line 102  sub start_radiobuttonresponse {
      $safeeval,'max',       $safeeval,'max',
      'randomize','direction');       'randomize','direction');
  if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }   if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
     } elsif ($target eq 'tex') {  
  my $type=&Apache::lonxml::get_param('TeXtype',$parstack,$safeeval,     } elsif ( $target eq 'tex' ) {
     undef,0);          my $type =
  if ($type eq '1') {            &Apache::lonxml::get_param( 'TeXtype', $parstack, $safeeval, undef,
     $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}';              0 );
  } elsif ($type eq 'A') {          if ( $type eq '1' ) {
     $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';              $result .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}';
  } elsif ($type eq 'a') {  
     $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}';  
  } elsif ($type eq 'i') {  
     $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}';  
  } else {  
     $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';  
  }  
         if($env{'form.pdfFormFields'} eq 'yes' && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {  
             $result .= '\begin{itemize}';  
         } else {  
             $result .= '\begin{enumerate}';  
         }          }
     } elsif ($target eq 'analyze') {          elsif ( $type eq 'A' ) {
  my $part_id="$Apache::inputtags::part.$id";              $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
           }
           elsif ( $type eq 'a' ) {
               $result .= ' \renewcommand{\labelenumi}{\alph{enumi}.}';
           }
           elsif ( $type eq 'i' ) {
               $result .= ' \renewcommand{\labelenumi}{\roman{enumi}.}';
           }
           else {
               $result .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}';
           }
   
       }
       elsif ( $target eq 'analyze' ) {
           my $part_id = "$Apache::inputtags::part.$id";
         $Apache::lonhomework::analyze{"$part_id.type"} = 'radiobuttonresponse';          $Apache::lonhomework::analyze{"$part_id.type"} = 'radiobuttonresponse';
  push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);   push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
     }      }
Line 120  sub start_radiobuttonresponse { Line 135  sub start_radiobuttonresponse {
 sub end_radiobuttonresponse {  sub end_radiobuttonresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;      my $result;
     if ($target eq 'edit') { $result=&Apache::edit::end_table(); }      if ( $target eq 'edit' ) { 
     if ($target eq 'tex' ) {   $result = &Apache::edit::end_table(); 
         if($env{'form.pdfFormFields'} eq 'yes' and $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {  
             $result .= '\end{itemize}';  
         } else {  
             $result .= '\end{enumerate}';  
         }  
     }      }
     &Apache::response::end_response;      &Apache::response::end_response;
     pop @Apache::lonxml::namespace;      pop @Apache::lonxml::namespace;
Line 223  sub end_foilgroup { Line 233  sub end_foilgroup {
     my $part = $Apache::inputtags::part;      my $part = $Apache::inputtags::part;
     my $bubbles_per_line = &getbubblesnum($part,$id);      my $bubbles_per_line = &getbubblesnum($part,$id);
   
   
     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||      if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
  $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex' || $target eq 'analyze') {
  my $style = $Apache::lonhomework::type;   my $style = $Apache::lonhomework::type;
Line 285  sub end_foilgroup { Line 296  sub end_foilgroup {
     }      }
     return $result;      return $result;
 }  }
   
 sub getbubblesnum {  sub getbubblesnum {
     my ($part,$id) = @_;      my ($part,$id) = @_;
     my $bubbles_per_line;      my $bubbles_per_line;
Line 328  sub format_prior_answer { Line 338  sub format_prior_answer {
   
 }  }
   
 sub displayallfoils {  
     my ($direction, $target)=@_;  
     my $result;  
     &Apache::lonxml::debug("survey style display");  
     my @names;  
     if ( $Apache::response::foilgroup{'names'} ) {  
  @names= @{ $Apache::response::foilgroup{'names'} };  
     }  
   
     my $temp=0;  ## 
     my $i   =0;  # Return the last survey response.  The logic is slightly different than that of 
     my $id=$Apache::inputtags::response['-1'];  # get_last_responses.  TODO: See if there are chunks of code betweenthis and
     my $part=$Apache::inputtags::part;  # get_last_reponses that are common and can be factored.
     my ($lastresponse,$newvariation,$showanswer);  #
     if ((($Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry') ||  # @param $part - Problem part under consideration.
         ($Apache::lonhomework::type eq 'randomizetry')) &&  # @param $showanswer - True if answers should be shown.
         ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {  # @param $id         - Problem id.
         if ($env{'form.'.$part.'.rndseed'} ne  #
             $Apache::lonhomework::history{"resource.$part.rndseed"}) {  # @return hash reference.
   # @retval reference to the has indexed by answer selection that 
   #         indicates the most recent answer.
   #
   sub get_last_survey_response {
       my ($part, $showanswer, $id) = @_;
   
       my $newvariation;
       my $lastresponse; # stringified last response.
   
       if (
           (
               (
                   $Apache::lonhomework::history{"resource.$part.type"} eq
                   'randomizetry'
               )
               || ( $Apache::lonhomework::type eq 'randomizetry' )
           )
           && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
         )
       {
           if ( $env{ 'form.' . $part . '.rndseed' } ne
               $Apache::lonhomework::history{"resource.$part.rndseed"} )
           {
             $newvariation = 1;              $newvariation = 1;
         }          }
     }      }
     $showanswer = &Apache::response::show_answer();      $showanswer = &Apache::response::show_answer();
     unless ((($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') || ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) && (defined($env{'form.grade_symb'})) ||      unless (
            ($newvariation && !$showanswer)) {          (
         $lastresponse =               (
     $Apache::lonhomework::history{"resource.$part.$id.submission"};                  $Apache::lonhomework::history{"resource.$part.type"} eq
                   'anonsurvey'
               )
               || ( $Apache::lonhomework::history{"resource.$part.type"} eq
                   'anonsurveycred' )
           )
           && ( defined( $env{'form.grade_symb'} ) )
           || ( $newvariation && !$showanswer )
         )
       {
           $lastresponse =
             $Apache::lonhomework::history{"resource.$part.$id.submission"};
       }
       my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
      
   
       return \%lastresponse;
   
   }
   ##
   # Removes the names from a foil group that are marked as unused.
   #
   # @param $names - reference to the array of names to filter.
   #
   # @return arrayref
   # @retval reference to the filtered array.
   #
   sub remove_unused {
       my ($names) = @_;
       my @result;
   
       foreach my $name (@{$names}) {
    if ($Apache::response::foilgroup{$name . '.value'} ne 'unused') {
       push(@result, $name);
    }
     }      }
     if ($direction eq 'horizontal') { $result.='<table><tr>'; }      return \@result;
     my %lastresponse=&Apache::lonnet::str2hash($lastresponse);  }
   ## 
   # Displays all foils in a survey type problem for HTML rendition.
   # TODO: See if there is any logic in this sub that can be shared
   #      with display_foils_html
   #
   # @param $names        - ref to array of names of the foils to display.
   # @param $part         - Problem part number.
   # @param $showanswer   - If true, show the answers.
   # @param $lastresponse - Ref to the last response hash.
   # @param $direction    - Display direction of the radiobuttons.
   #
   # @return string
   # @retval HTML required to display the resource in a browser.
   #
   sub display_survey_html {
       my ($names, $part, $showanswer, $lastresponse, $direction) = @_;
       my $result;
   
       # Figure out a few fragments of html that depend onthe 
       # orientation of the radiobuttons:
       # closing_html - HTML to emit at the end of the resource.
       # pre_foil     - HTML to emit prior to each foil.
       # post_foil    - HTML to emit following each foil.
       #
       #  The opening HTML is just added to the $result now
       #
       #  Figuring these outin advance compresses the loop over foils into something
       #  pretty simple:
       #
       # NOTE: There's probably a really cool way to do this with style sheets
       #       and picking the selector based on the orientation, if someone wants to puzzle
       #       that out.  In that case, probably the whole thing lives in a <div> and each
       #       foil lives in a <p>
       #
   
   
       my ($opening_html, $closing_html, $pre_foil, $post_foil) = 
    &html_direction_fragments($direction);
   
       $result = $opening_html;
   
       # Different rendering depending on whether answers are shown:
       # I played with different factorings but this seems the most concise/clear...
       # although I don't like the $showanswer conditino inside the loop.  Other things I tried
       #  - two loops..much longer code..no gain in clarity.
       #  - Using a visitor patttern passing it the rendering code chunklets and
       #    an anonymous hash reference for state data etc. Very cool but
       #    quite a bit more code and quite a bit less clear.
       
       my $temp = 0;
       foreach my $name (@{$names}) {
    $result .= $pre_foil;
   
    if ($showanswer) {
       my $foiltext =  $Apache::response::foilgroup{$name . '.text'};
   
       # Bold the prior  response:
   
       if (defined($lastresponse->{$name})) {
    $result .= '<b>' . $foiltext . '</b>';
       } else {
    $result .= $foiltext;
       }
    } else {
       $result .= &html_radiobutton(
    $part, $Apache::inputtags::response['-1'], $name, $lastresponse, $temp
        );
    }
   
    $result .= $post_foil;
    $temp++;
       }
   
   
       $result .= $closing_html;
       return $result;
   
   }
   
   ##
   #  Generate LaTeX for surveys.
   #  
   #   @param $names - names of the foils to display.
   #   @param $showanswer - flag that is true to display answers.
   #   @param $lastresponse - Reference to a hash the indicates the last response.
   #   @param $direction    - Orientation of foils ('horiztonal' or otherwise).
   #   @param $venv         - LaTeX name for vertical env.
   #
   #   @return string
   #   @retval LaTeX rendering of the survey question.
   
   sub latex_survey {
       my ($names, $showanswer, $lastresponse, $direction, $venv) = @_;
   
       my $result;
     if ($showanswer) {      if ($showanswer) {
  foreach my $name (@names) {   $result .= "\\begin{$venv}";
     if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {   foreach my $name (@{$names}) {
  if (($direction eq 'horizontal') && ($target ne 'tex')) {      
     $result.="<td>";      
  } else {      $result .= '\item \vskip -2mm ';
     if ($target eq 'tex') {      
  $result .= '\item \vskip -2mm ';      if ( defined( $lastresponse->{$name} ) ) {
     } else {   $result .= '}';
  $result.="<br />";  
     }  
  }  
  if (defined($lastresponse{$name})) {  
     if ($target eq 'tex') {  
  $result .= '}';  
     } else {  
  $result.='<b>';  
     }  
  }  
  $result .= $Apache::response::foilgroup{$name.'.text'};  
  if (defined($lastresponse{$name}) && ($target ne 'tex')) {  
     $result.='</b>';  
  }  
  if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.="</td>"; }  
     }      }
       $result .= $Apache::response::foilgroup{ $name . '.text' } . ' ';
  }   }
    $result .= "\\end{$venv}";
   
       } elsif ( $env{'form.pdfFormFields'} eq 'yes'
         && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
    $result .= &display_pdf_form($names, $direction, $venv);
     } else {      } else {
  foreach my $name (@names) {   if ($direction eq 'horizontal') {
     if ($Apache::response::foilgroup{$name.'.value'} ne 'unused') {      my @foil_texts = &get_foil_texts($names);
  if ($direction eq 'horizontal') {      $result .=  &Apache::caparesponse::make_horizontal_latex_bubbles(
     $result.="<td>";      $names, \@foil_texts, '$\bigcirc$');
  } else {   } else {
     if ($target eq 'tex') {      $result .= "\\begin{$venv}";
         if($env{'form.pdfFormFields'} eq 'yes' && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {  
                             my $fieldname = $env{'request.symb'}.'&part_'. $Apache::inputtags::part      my $temp = 0;
                                             .'&radiobuttonresponse'.'&HWVAL_'.$Apache::inputtags::response['-1'];      my $i    = 0;
                             $result .= '\item[{'.&Apache::lonxml::print_pdf_radiobutton($fieldname,$temp).'}]'      foreach my $name (@{$names}) {
                                        .$Apache::response::foilgroup{$name.'.text'}."\n";  
                         } else {   $result .= '\item \vskip -2mm ';
                             $result .= '\item \vskip -2mm ';  
                         }   if ($env{'form.pdfFormFields'} ne 'yes'
                     } else {      or $Apache::inputtags::status[-1] ne 'CAN_ANSWER' )
  $result.="<br />";   {
     }      $result .=
  }   '$\bigcirc$'
  if ($target eq 'tex') {   . $Apache::response::foilgroup{ $name . '.text' }
     if($env{'form.pdfFormFields'} ne 'yes' or $Apache::inputtags::status[-1] ne 'CAN_ANSWER') {      . '\\\\';    #' stupid emacs
                         $result .= '$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';  #' stupid emacs  
                     }  
     $i++;  
  } else {  
     $result .= '<label>';  
     $result.="<input  
                        onchange=\"javascript:setSubmittedPart('$part');\"  
                        type=\"radio\"  
                        name=\"HWVAL_$Apache::inputtags::response['-1']\"  
                        value=\"$temp\"";  
   
     if (defined($lastresponse{$name})) { $result .= ' checked="checked"'; }  
     $result .= ' />'.$Apache::response::foilgroup{$name.'.text'}.  
  '</label>';  
  }   }
   
    $i++;    
  $temp++;   $temp++;
  if ($target ne 'tex') {  
     if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.="</td>"; }   $result .= '\vskip 0 mm ';
  } else {  
     $result.='\vskip 0 mm ';  
  }  
     }      }
  }      $result .= "\\end{$venv}";
    }
     }      }
       
     if (($direction eq 'horizontal') && ($target ne 'tex')) { $result.='</tr></table>'; }  
     return $result;      return $result;
 }  }
   ##
   #  Figure out the LaTeX environment in which to wrap the LaTeX vertical output.
   #
   # @return string
   # @retval the environment name.  The LaTeX should be wrapped a 
   #    \begin{retval} \end{retval} pair.
   #
   sub latex_vertical_environment {
       if ($env{'form.pdfFormFields'} eq 'yes'
    && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
    return 'itemize';
       } else {
    return 'enumerate';
       }
   }
   
   ##
   # Figure out the key html fragments that depend on the rendering direction:
   #
   # @param $direction - 'horizontal' for horizontal direction.
   #
   # @return list
   # @retval (part_start, part_end, foil_start, foil_end)
   # Where:
   #   - part_start is the HTML to emit at the start of the part.
   #   - part_end   is the HTML to emit at the end of the part.
   #   - foil_start is the HTML to emit prior to each foil.
   #   - foil_end is the HTML to emit after each foil
   #
   sub html_direction_fragments {
       my $direction = shift;
       if ($direction eq 'horizontal') {
    return ('<table><tr>', '</tr></table>', '<td>', '</td>');
       } else {
    return ('', '<br />', '<br />', '');
       }
   }
   
   ##
   #
   #  Displays all the foils of a problem in a format suitable for
   #   surveys, surveys for credit, anonymous surveys and anonymous surveys for credit.
   #
   #  @param $direction - Display direction of the choices ('horiztonal' or not).
   #  @param $target    - Rendering target.
   #
   #  @return string
   #  @retval Text that renders for the selected target.
   # 
   sub displayallfoils{
       my ( $direction, $target ) = @_;
       my $result;
       &Apache::lonxml::debug("survey style display");
   
       my @names;
   
       if ( $Apache::response::foilgroup{'names'} ) {
           @names = @{ $Apache::response::foilgroup{'names'} };
       }
   
   
       my $id   = $Apache::inputtags::response['-1'];
       my $part = $Apache::inputtags::part;
       
       my $showanswer = &Apache::response::show_answer();
       my $lastresponse = &get_last_survey_response($part, $showanswer, $id);
       my $used_names = &remove_unused(\@names);
   
   
       if ($target ne 'tex') {
    $result .= &display_survey_html(
       $used_names, $part, $showanswer, $lastresponse, $direction
    );
       } else {
   
    my $vertical_env = &latex_vertical_environment();
    $result .= &latex_survey(
       $used_names, $showanswer, $lastresponse, $direction, $vertical_env
    );
   
       }
       return $result;
   }
   
 sub whichfoils {  sub whichfoils {
     my ($max,$randomize)=@_;      my ($max,$randomize)=@_;
Line 583  sub whichfoils { Line 794  sub whichfoils {
     return ($answer,@whichfalse);      return ($answer,@whichfalse);
 }  }
   
 sub displayfoils {  ## 
     my ($target,$answer,$whichfoils,$direction, $bubbles_per_line)=@_;  #  Return a list  of foil texts given foil names.
   #  
   # @param $whichfoils - Reference to a list of foil names.
   #
   # @return array
   # @retval foil texts
   #
   sub get_foil_texts {
       my ($whichfoils) = @_;
       my @foil_texts;
   
       foreach my $name (@{$whichfoils}) {
    push(@foil_texts, $Apache::response::foilgroup{$name . '.text'});
       }
       return @foil_texts;
   }
   
   ##
   # Generate the HTML for a single html foil.
   # @param $part           - The part for which the response is being generated.
   # @param $fieldname      - The basename of the radiobutton field
   # @param $name           - The foilname.
   # @param $last_responses - Reference to a hash that holds the most recent
   #                          responses.
   # @param $value          - radiobutton value.
   # 
   # @return text
   # @retval The generated html.
   #
   sub html_radiobutton {
       my ($part, $fieldname, $name, $last_responses, $value) = @_;
   
       my $result='<label>';
       
       $result .= '<input type="radio"
                   onchange="javascript:setSubmittedPart(' . "'$part');\""
    . 'name="HWVAL_' . $fieldname . '"'
    . "value='$value'";
   
       if (defined($last_responses->{$name})) {
    $result .= '  checked="checked" ';
       }
       $result .= ' />';
       $result .= $Apache::response::foilgroup{$name . '.text'};
       $result .= '</label>';
   
       return $result;
   
   }
   ##
   # Return a reference to the last response hash. This hash has exactly
   # one or zero entries.  The one entry is keyed by the foil 'name' of
   # the prior response
   #
   # @param $part - Number of the problem part.
   # 
   # @return reference to a hash.
   # @retval see above.
   #
   sub get_last_response {
       my ($part) = @_;
   
       my $id = $Apache::inputtags::response['-1'];
       my ( $lastresponse, $newvariation );
       
       if ((( $Apache::lonhomework::history{"resource.$part.type"} eq  'randomizetry')
    || ( $Apache::lonhomework::type eq 'randomizetry' )
    )
    && ( $Apache::inputtags::status[-1] eq 'CAN_ANSWER' )
    )
       {
   
    if ( $env{ 'form.' . $part . '.rndseed' } ne
        $Apache::lonhomework::history{"resource.$part.rndseed"} )
    {
       $newvariation = 1;
    }
       }
       unless ($newvariation) {
    $lastresponse =
       $Apache::lonhomework::history{"resource.$part.$id.submission"};
       }
       my %lastresponse = &Apache::lonnet::str2hash($lastresponse);
   
       return \%lastresponse;
   }
   
   ##
   # Display foils in html rendition.:
   #
   # @param $whichfoils - Set of foils to display.
   # @param $target     - Rendition target...there are several html targets.
   # @param $direction  - 'horizontal' if layout is horizontal.
   # @param $part       - Part of the problem that's being displayed.
   # @param $show_answer- True if answers should be shown.
   #
   # @return string
   # @retval generated html.
   #
   sub display_foils_html {
       my ($whichfoils, $target, $direction, $part, $show_answer) = @_;
     my $result;      my $result;
   
     my $part=$Apache::inputtags::part;  
     my $solved=$Apache::lonhomework::history{"resource.$part.solved"};      # if the answers get shown, we need to label each item as correct or
     if ( ($target ne 'tex') &&      # incorrect.
  &Apache::response::show_answer() ) {  
  if ($direction eq 'horizontal') {      my ($opening_html, $finalclose, $item_pretext, $item_posttext) = 
     if ($target ne 'tex') {   &html_direction_fragments($direction);
  $result.='<table><tr>';  
       $result .= $opening_html;
   
   
       if ($show_answer) {
   
    foreach my $name (@{$whichfoils}) {
   
       # If the item gets further surrounded by tags, this 
       # holds the closures for those tages.
   
       my $item_closetag = '';
   
       $result .= $item_pretext;
   
       # Label each foil as correct or incorrect:
   
       if ($Apache::response::foilgroup{$name . '.value'} eq 'true') {
    $result .= &mt('Correct:') . '<b>';
    $item_closetag .= '</b>';
   
       } else {
    $result .= &mt('Incorrect');
     }      }
  }  
  foreach my $name (@{ $whichfoils }) {      # Web rendition encloses the 
     if ($direction eq 'horizontal') {      # item text in a label tag as well:
  if ($target ne 'tex') { $result.='<td>'; }  
       if ($target eq 'web') {
    $result .= '<label>';
    $item_closetag = '</label>' . $item_closetag;
     }      }
     if ($target ne 'tex') {      $result .= $Apache::response::foilgroup{$name . '.text'};
  $result.="<br />";      $result .= $item_closetag;
     } else {      $result .= $item_posttext;
  $result.='\item \vskip -2 mm  ';      $result .= "\n"; # make the html a bit more readable.
    }
   
   
       } else {
    my $lastresponse = &get_last_response($part);
   
    my $item_no = 0;
    foreach my $name (@{$whichfoils}) {
       $result .= $item_pretext;
       $result .= &html_radiobutton(
    $part, $Apache::inputtags::response[-1],
    $name, $lastresponse, $item_no
    );
       $result .= $item_posttext;
       $item_no++;
    }
   
       }
       $result .= $finalclose;
   
       return $result;
   }
   ##
   #  Display foils in exam mode for latex
   #
   # @param $whichfoils       - Reference to an array that contains the foil names to display
   # @param $bubbles_per_line - Number of bubbles on a line.
   # @param $direction        - Rendering direction 'horizontal' is what we're looking for.
   # @param $venv             - Name of LaTeX environment to use for vertical rendering.
   #
   # @return string
   # @return the latex rendering of the exam problem.
   #
   #
   sub display_latex_exam {
       my ($whichfoils, $bubbles_per_line, $direction, $venv) = @_;
       my $result;
       my $numlines;
       my $bubble_number = 0;
       my $line          = 0;
       my $i             = 0;
   
       
       if ($direction eq  'horizontal') {
   
    # Marshall the display text for each foil and turn things over to
    # Apache::response::make_horizontal_bubbles:
   
    my @foil_texts = &get_foil_texts($whichfoils);
    $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
       $whichfoils, \@foil_texts, '$\bigcirc$');
   
       } else {
   
    $result .= '\vskip 2mm \noindent';
   
    # This section puts out the prefix that tells the user
    # (if necessary) to only choose one bubble in the next n lines
    # for problems with more than one line worth of bubbles in the grid sheet:
   
    my $numitems = scalar( @{$whichfoils} );
    $numlines = int( $numitems / $bubbles_per_line );
    if ( ( $numitems % $bubbles_per_line ) != 0 ) {
       $numlines++;
    }
    if ( $numlines < 1 ) {
       $numlines = 1;
    }
    if ( $numlines > 1 ) {
       my $linetext;
       for ( my $i = 0 ; $i < $numlines ; $i++ ) {
    $linetext .= $Apache::lonxml::counter + $i . ', ';
     }      }
     if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {       $linetext =~ s/,\s$//;
  if ($target ne 'tex') {      $result .=
                     $result.=&mt('Correct:').'<b>';   '\small {\textbf{'
                 } else {   . $linetext . '}} '
                     $result.=&mt('Correct:').' \textbf{';   . ' {\footnotesize '
                 }   . &mt( '(Bubble once in [_1] lines)', $numlines )
     } else {   . '} \hspace*{\fill} \\\\';
  $result.=&mt('Incorrect:');   }
    else {
       $result .= '\textbf{' . $Apache::lonxml::counter . '}.';
    }
   
    # Now output the bubbles themselves:
   
    foreach my $name (@{$whichfoils}) {
       if ( $bubble_number >= $bubbles_per_line ) {
    $line++;
    $i             = 0;
    $bubble_number = 0;
     }      }
     if ($target eq 'web') { $result.="<label>"; }      my $identifier;
     $result.=$Apache::response::foilgroup{$name.'.text'};      if ( $numlines > 1 ) {
     if ($target eq 'web') { $result.="</label>"; }   $identifier = $Apache::lonxml::counter + $line;
     if ($Apache::response::foilgroup{$name.'.value'} eq 'true') {  
  if ($target ne 'tex') { $result.='</b>';} else {$result.='}';}  
     }      }
     if ($direction eq 'horizontal') {      my $preindent;
  if ($target ne 'tex') { $result.='</td>'; }      if ($bubble_number > 0) {
    $preindent = '\hspace*{3 mm}';
     }      }
       my $foiltext = $Apache::response::foilgroup{$name . '.text'};
       $foiltext =~ s/\\noindent//; # forgive me for I have sinned..
       $result .= '{\small \textbf{'
    . $identifier  .$preindent
    . $alphabet[$i]
    . '}}$\bigcirc$'
    . $foiltext
       . '\\\\';    #' stupid emacs -- it thinks it needs that apostrophe to close the quote
       
       $i++;
       $bubble_number++;
  }   }
  if ($direction eq 'horizontal') {  
     if ($target ne 'tex') {      }
  $result.='</tr></table>';  
     }      return $result;
       
   }
   
   ##
   #  Display latex when exam mode is not on.
   #
   #  @param $whichfoils - The foils to display
   #  @param $direction  - Display direction ('horizontal' is what matters to us).
   #  @param $venv       - Vertical env. to use for vertical rendering.
   #  @param  $vend      - End the vertical environment being used.
   #
   #  @return string
   #  @retval - The LaTeX rendering of the resource.'
   #
   sub display_latex {
       my ($whichfoils, $direction, $venv) = @_;
       my $result;
   
       # how we render depends on the direction.
       # Vertical is some kind of list environment determined by vbegin/vend.
       # Horizontal is a table that is generated by 
       # Apache::caparesponse::make_horizontal_latex_bubbles with an empty string
       # for the actual bubble text.
   
       if ($direction eq 'horizontal') {
    my @foil_texts = &get_foil_texts($whichfoils);
    $result .= &Apache::caparesponse::make_horizontal_latex_bubbles(
       $whichfoils, \@foil_texts, '');
       } else {
    $result .= "\\begin{$venv}";
    foreach my $name (@{$whichfoils}) {
       $result .=  '\vspace*{-2 mm}\item '
    . $Apache::response::foilgroup{ $name . '.text' };
  }   }
   
    $result .= "\\end{$venv}";
       }
       return $result;
   }
   
   
   ##
   #  Render foils for a PDF form. This is a variant of tex rednering that provides
   #  sufficient markup that the final PDF is a form that can be filled in online,
   #  or offline.
   #
   # @param $whichfoils - References an array of foils to display in the order in which
   #                     they should be displayed.
   # @param $direction  - Rendering direction.  'horiztonal' means inputs are laid out
   #                      horizontally otherwise they are stacked vertically.
   # @param $venv       - Vertical environment in which to wrap the foils.
   #
   # @return string
   # @retval String containing the rendering of the resource.
   #
   # TODO: Take into account direction!!!
   #
   sub display_pdf_form {
       my ($whichfoils, $direction, $venv) = @_;
       my $temp = 0;
       my $result;
   
       $result .= "\\begin{$venv}";
       foreach my $name ( @{$whichfoils} ) {
   
    my $fieldname =
       $env{'request.symb'} 
    . '&part_'
       . $Apache::inputtags::part
       . '&radiobuttonresponse'
       . '&HWVAL_'
       . $Apache::inputtags::response['-1'];
    $result .= '\item[{'
       . &Apache::lonxml::print_pdf_radiobutton( $fieldname,
         $temp )
       . '}]'
       . $Apache::response::foilgroup{ $name . '.text' }
    . "\n";
   
    $temp++;
       }
       $result .= "\\end{$venv}";
   
       return $result;
   }
   
   
   ##
   # Display selected foils:  This is really just a dispatchter to appropriate renderers
   #  
   # @param $target   - Target (e.g. 'tex'...).
   # @param $answer   - True if answers should be shown.
   # @param $whichfoils - Array of foil selectors that indicate which foils shouild be
   #                      rendered, in rendering order.
   # @param $direction- Rendering direction ('horizontal' is the one we look for,
   #                    otherwise foils are rendered one per line vertically.
   # @param $bubbles_per_line - number of exam bubbles per line.
   #
   # @return string
   # @retval The rendered problem.
   
   sub displayfoils {
       my ($target,$answer,$whichfoils,$direction, $bubbles_per_line)=@_;
       my $result;
   
   
       my $part   = $Apache::inputtags::part;
       my $solved = $Apache::lonhomework::history{"resource.$part.solved"};
   
       # Show answers html.
   
       if ( ( $target ne 'tex' )
           && &Apache::response::show_answer() )
       {
   
    $result = &display_foils_html(
       $whichfoils, $target, $direction, $part,  1);
   
    # other html
       }  elsif ($target ne 'tex') {
       $result = &display_foils_html($whichfoils, $target, $direction, $part,
     0, 0);
   
          # LaTeX rendering:
     } else {      } else {
  my @alphabet = ('A'..'Z');  
  my $i = 0;  
  my $bubble_number = 0;          my $id            = $Apache::inputtags::response['-1'];
  my $line = 0;          my $part          = $Apache::inputtags::part;
  my $temp=0;     my $numlines;
  my $id=$Apache::inputtags::response['-1'];  
  my $part=$Apache::inputtags::part;   # Decide how to bracket the list of foils:
         my ($lastresponse,$newvariation);  
         if ((($Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry') ||   my $vertical_env = &latex_vertical_environment();
              ($Apache::lonhomework::type eq 'randomizetry')) &&   
         ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {   # Rendering for latex exams.
             if ($env{'form.'.$part.'.rndseed'} ne  
                 $Apache::lonhomework::history{"resource.$part.rndseed"}) {   if ( ( $Apache::lonhomework::type eq 'exam' ) )
                 $newvariation = 1;   {
             }      $result .= &display_latex_exam(
         }   $whichfoils, $bubbles_per_line, $direction, $vertical_env);
         unless ($newvariation) {  
     $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};      $result .= '\vskip 0mm ';
         }      
  my %lastresponse=&Apache::lonnet::str2hash($lastresponse);   } else {    
  if ($target ne 'tex' && $direction eq 'horizontal') {  
     $result.="<table><tr>";      # Different rendering for PDF form than for a
  }      # 'regular' answer direction is honored in both of those
         my $numlines;      #
         if (($target eq 'tex') && ($Apache::lonhomework::type eq 'exam')) {  
             my $numitems = scalar(@{ $whichfoils });      if ( ($env{'form.pdfFormFields'} eq 'yes')
             $numlines = int($numitems/$bubbles_per_line);      && ($Apache::inputtags::status[-1] eq 'CAN_ANSWER'))
             if (($numitems % $bubbles_per_line) != 0) {      {
                 $numlines ++;   $result .= &display_pdf_form($whichfoils, $direction, $vertical_env);
             }  
             if ($numlines < 1) {  
                 $numlines = 1;  
             }  
             if ($numlines > 1) {  
                 my $linetext;  
                 for (my $i=0; $i<$numlines; $i++) {  
                     $linetext .= $Apache::lonxml::counter+$i.', ';  
                 }  
                 $linetext =~ s/,\s$//;  
                 $result .= '\item[\small {\textbf{'.$linetext.'}}]'.  
                            ' {\footnotesize '.  
                            &mt('(Bubble once in [_1] lines)',$numlines).  
                            '} \hspace*{\fill} \\\\';  
             } else {  
                 $result .= '\item[\textbf{'.$Apache::lonxml::counter.'}.]';  
             }  
         }  
  foreach my $name (@{ $whichfoils }) {  
     if ($target ne 'tex') {  
  if ($direction eq 'horizontal') {  
     $result.="<td>";   
  } else {   
     $result.="<br />";  
  }   
     }  
     if ($target ne 'tex') {   
                 $result.= '<label>';  
  $result.=  
     "<input type=\"radio\"  
                             onchange=\"javascript:setSubmittedPart('$part');\"  
                             name=\"HWVAL_$Apache::inputtags::response['-1']\"  
                             value=\"$temp\"";  
  if (defined($lastresponse{$name})) { $result .= ' checked="checked"'; }  
  $result .= ' />'.$Apache::response::foilgroup{$name.'.text'}."</label>";  
     } else {      } else {
  if ($Apache::lonhomework::type eq 'exam') {   $result .= &display_latex($whichfoils,  $direction, $vertical_env );
     if($bubble_number >= $bubbles_per_line) {  
  $line++;  
  $i = 0;  
  $bubble_number = 0;  
     }  
                     my $identifier;  
                     if ($numlines > 1) {  
                         $identifier = $Apache::lonxml::counter+$line;  
                     }  
                     $result .= '{\small \textbf{'.$identifier.$alphabet[$i].'}}$\bigcirc$'.$Apache::response::foilgroup{$name.'.text'}.'\\\\';  #' stupid emacs  
     $i++;  
     $bubble_number++;  
  } else {  
                     if($env{'form.pdfFormFields'} eq 'yes' && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {  
                         my $fieldname = $env{'request.symb'}.'&part_'. $Apache::inputtags::part  
                                         .'&radiobuttonresponse'.'&HWVAL_'.$Apache::inputtags::response['-1'];  
                         $result .= '\item[{'.&Apache::lonxml::print_pdf_radiobutton($fieldname,$temp).'}]'  
                                    .$Apache::response::foilgroup{$name.'.text'}."\n";  
                     } else {   
                         $result .= '\vspace*{-2 mm}\item '.$Apache::response::foilgroup{$name.'.text'};  
                     }  
                 }  
     }  
     if ($target ne 'tex' && $direction eq 'horizontal') {  
  $result.="</td>";   
     }      }
     $temp++;      $result .= '\vskip 0 mm '; 
  }         
  if ($target ne 'tex' && $direction eq 'horizontal') {  
     $result.="</tr></table>";  
  }   }
     }      }
     if ($target ne 'tex') { if ($direction ne 'horizontal') { $result.="<br />";} } else { $result.='\vskip 0 mm '; }  
     return $result;      return $result;
 }  }
   
Removed from v.1.154  
changed lines
  Added in v.1.155

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