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Diff for /loncom/homework/structuretags.pm between versions 1.222 and 1.408

version 1.222, 2003/11/04 14:46:28 version 1.408, 2007/10/31 01:37:52
Line 25 Line 25
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # 2/19 Guy  ###
 # 6/26/2001 fixed extra web display at end of <web></web> tags  
 # 8/17,8/18,8/20 Gerd Kortemeyer  
   
   
 package Apache::structuretags;   package Apache::structuretags; 
Line 37  use Apache::lonnet; Line 35  use Apache::lonnet;
 use Apache::File();  use Apache::File();
 use Apache::lonmenu;  use Apache::lonmenu;
 use Apache::lonlocal;  use Apache::lonlocal;
   use Apache::lonxml;
   use Apache::lonenc();
   use Time::HiRes qw( gettimeofday tv_interval );
   use lib '/home/httpd/lib/perl/';
   use LONCAPA;
    
 BEGIN {  BEGIN {
     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext',      &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
 'simpleeditbutton','definetag'));  
 }  }
   
 sub start_web {  sub start_web {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);      if ($target ne 'edit' && $target ne 'modified') {
     if ($target eq 'web') {   my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
  return $bodytext;   if ($target eq 'web' || $target eq 'webgrade') {
       return $bodytext;
    }
       } elsif ($target eq "edit" ) {
    my $bodytext = 
       &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
    my $result = &Apache::edit::tag_start($target,$token);
    $result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
    return $result;
       } elsif ( $target eq "modified" ) {
    return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
     }      }
     return '';      return '';
 }  }
Line 57  sub end_web { Line 69  sub end_web {
 }  }
   
 sub start_tex {  sub start_tex {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);      if ($target ne 'edit' && $target ne 'modified') {
     if ($target eq 'tex') {   my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
  return $bodytext.' ';   if ($target eq 'tex') {
       return $bodytext.' ';
    }
       } elsif ($target eq "edit" ) {
    my $bodytext = 
       &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
    my $result = &Apache::edit::tag_start($target,$token);
    $result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
    return $result;
       } elsif ( $target eq "modified" ) {
    return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
     }      }
     return $result;;      return $result;;
 }  }
Line 70  sub end_tex { Line 92  sub end_tex {
     return '';      return '';
 }  }
   
   sub homework_js {
       return &Apache::loncommon::resize_textarea_js().
    <<'JS';
   <script type="text/javascript">
   function setSubmittedPart (part) {
      this.document.lonhomework.submitted.value="part_"+part;
   }
   
   function image_response_click (which, e) {
       init_geometry();
       if (!e) { e = window.event; } //IE
       var input_element = document.lonhomework.elements[which];
       var token_element = document.lonhomework.elements[which+'_token'];
       var token = token_element.value;
       var img_element   = document.getElementById(which+'_imageresponse');
       var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
       var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
       var click = x+':'+y;
       input_element.value = click;
       img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
   }
   </script>
   JS
   }
   
 sub page_start {  sub page_start {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
    $extra_head)=@_;
     my %found;      my %found;
     foreach my $taginside (@$tagstack) {      foreach my $taginside (@$tagstack) {
  foreach my $taglookedfor ('html','body','form') {   foreach my $taglookedfor ('html','body','form') {
Line 79  sub page_start { Line 127  sub page_start {
  }   }
     }      }
   
     my $result;      if ($target eq 'tex') {
     my $head_tag_start;   return
     if (!defined($found{'html'})) {      &Apache::londefdef::start_html($target,$token,$tagstack,
  $result=&Apache::londefdef::start_html($target,$token,$tagstack,     $parstack,$parser,$safeeval);
        $parstack,$parser,$safeeval);  
  $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);  
     }      }
     my $body_tag_start;  
     if (!defined($found{'body'})) {      $extra_head .= &homework_js();
  $body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.  
     'onUnload="'.&Apache::lonmenu::unloadevents().'" ';      my %body_args;
  my $background=&Apache::lonxml::get_param('background',$parstack,      if (defined($found{'html'})) {
   $safeeval);   $body_args{'skip_phases'}{'head'}=1;
  if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }      } else {
  if ($background) {  
     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   $extra_head .= &Apache::lonhtmlcommon::spellheader();
  $background;  
     $body_tag_start.='background="'.$background.'" ';   $extra_head .= &Apache::londefdef::generate_css_links();
  } else {  
     my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,   if ($env{'request.state'} eq 'construct') {
    $safeeval);      $extra_head.=&Apache::edit::js_change_detection().
     if (($bgcolor) && ($ENV{'browser.blackwhite'} ne 'on')) {   "<script type=\"text/javascript\">\n".
  $body_tag_start.='bgcolor="'.$bgcolor.'" ';   "if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
     } else {   &Apache::loncommon::browser_and_searcher_javascript().
  $body_tag_start.='bgcolor="#ffffff"';                  "\n</script>\n";
    }
       }
   
       if (defined($found{'body'})) {
    $body_args{'skip_phases'}{'body'}=1;
       } elsif (!defined($found{'body'}) 
        && $env{'request.state'} eq 'construct') {
    if ($target eq 'web' || $target eq 'edit') {
       if ($env{'environment.remote'} ne 'off') {
    $body_args{'only_body'}  = 1;
     }      }
  }   }
  if ($ENV{'browser.fontenhance'} eq 'on') {      } elsif (!defined($found{'body'})) {
     $body_tag_start.=' style="font-size: x-large;" ';   my %add_entries;
    my $background=&Apache::lonxml::get_param('background',$parstack,
     $safeeval);
    if ($background ne '' ) {
       $add_entries{'background'} = $background;
  }   }
  $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);  
  if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {   my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
     my ($symb,undef,undef,undef,$publicuser)=         $safeeval);
  &Apache::lonxml::whichuser();          if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
     if ($symb eq '' && !$publicuser) {  
  my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");   $body_args{'bgcolor'}        = $bgcolor;
  $help=&mt("Browsing resource, all submissions are temporary.")."<br />";   $body_args{'no_title'}       = 1;
  $body_tag_start.=$help;   $body_args{'force_register'} = 1;
     }   $body_args{'add_entries'}    = \%add_entries;
    if ($env{'environment.remote'} eq 'off'
       && $env{'request.state'} eq   'construct') {
       $body_args{'only_body'}  = 1;
    }
       }
       $body_args{'no_auto_mt_title'} = 1;
       my $page_start = &Apache::loncommon::start_page($name,$extra_head,
       \%body_args);
   
       if (!defined($found{'body'}) 
    && $env{'request.state'} ne 'construct'
    && ($target eq 'web' || $target eq 'webgrade')) {
   
    my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
    if ($symb eq '' && !$publicuser) {
       my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
       $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
       $page_start .= $help;
  }   }
     }      }
   
       if (!defined($found{'body'})) {
    $page_start .= &Apache::lonxml::message_location();
       }
       
     my $form_tag_start;      my $form_tag_start;
     if (!defined($found{'form'})) {      if (!defined($found{'form'})) {
  $form_tag_start='<form name="lonhomework" method="POST" action="'.   $form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
     $ENV{'request.uri'}.'">';   my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
    $form_tag_start.=$uri.'" ';
    if ($target eq 'edit') {
       $form_tag_start.=&Apache::edit::form_change_detection();
    }
    $form_tag_start.='>'."\n";
   
    my $symb=&Apache::lonnet::symbread();
    if ($symb =~ /\S/) {
       $symb=
    &HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
       $form_tag_start.=
    "\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
    }
     }      }
     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);      return ($page_start,$form_tag_start);
 }  }
   
 #use Time::HiRes();  #use Time::HiRes();
 sub get_resource_name {  sub get_resource_name {
     my ($parstack,$safeeval)=@_;      my ($parstack,$safeeval)=@_;
       my $name;
     if (defined($Apache::lonhomework::name)) {      if (defined($Apache::lonhomework::name)) {
  return $Apache::lonhomework::name;   $name = $Apache::lonhomework::name;
     }      } else {
     my $name=&Apache::lonnet::gettitle();   my ($symb)=&Apache::lonnet::whichuser();
     if ($name eq '') {   $name=&Apache::lonnet::gettitle($symb);
  $name=&Apache::lonnet::EXT('resource.title');   if ($name eq '') {
  if ($name eq 'con_lost') { $name = ''; }      $name=&Apache::lonnet::EXT('resource.title');
     }      if ($name eq 'con_lost') { $name = ''; }
     if ($name!~/\S+/) {   }
  $name=$ENV{'request.uri'};   if ($name!~/\S+/) {
  $name=~s-.*/([^/]+)$-$1-;      $name=$env{'request.uri'};
       $name=~s-.*/([^/]+)$-$1-;
    }
    # The name has had html tags escaped:
          
    $name=~s/&lt;/</gs;
    $name=~s/&gt;/>/gs;
   
    $Apache::lonhomework::name=$name;
     }      }
     $Apache::lonhomework::name=$name;  
     return $name;      return $name;
 }  }
   
 sub setup_rndseed {  sub setup_rndseed {
     my ($safeeval)=@_;      my ($safeeval)=@_;
     my $rndseed;      my $rndseed;
     my ($symb)=&Apache::lonxml::whichuser();      my ($symb)=&Apache::lonnet::whichuser();
     if ($ENV{'request.state'} eq "construct" || $symb eq '') {      if ($env{'request.state'} eq "construct" 
  $rndseed=$ENV{'form.rndseed'};   || $symb eq '' 
    || $Apache::lonhomework::type eq 'practice'
    || $Apache::lonhomework::history{'resource.CODE'}) {
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
    ['rndseed']);
    $rndseed=$env{'form.rndseed'};
  if (!$rndseed) {   if (!$rndseed) {
     $rndseed=$Apache::lonhomework::history{'rndseed'};      $rndseed=$Apache::lonhomework::history{'rndseed'};
     if (!$rndseed) {      if (!$rndseed) {
  $rndseed=time;   $rndseed=time;
  $ENV{'form.rndseed'}=$rndseed;  
     }      }
       $env{'form.rndseed'}=$rndseed;
  }   }
  if ($ENV{'form.resetdata'} eq &mt('New Problem Variation') ||   if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
     $ENV{'form.newrandomization'} eq &mt('New Randomization')) {        && $env{'form.submitted'} eq 'yes')  ||
       $env{'form.newrandomization'} eq &mt('New Randomization')) {
     srand(time);      srand(time);
     $rndseed=int(rand(2100000000));      $rndseed=int(rand(2100000000));
     $ENV{'form.rndseed'}=$rndseed;      $env{'form.rndseed'}=$rndseed;
     delete($ENV{'form.resetdata'});      delete($env{'form.resetdata'});
     delete($ENV{'form.newrandomization'});      delete($env{'form.newrandomization'});
  }   }
  if (defined($rndseed) && $rndseed ne int($rndseed)) {   if (defined($rndseed) && $rndseed ne int($rndseed)) {
    $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));      $rndseed=join(':',&Apache::lonnet::digest($rndseed));
         }          }
           if ($Apache::lonhomework::history{'resource.CODE'}) {
      $rndseed=&Apache::lonnet::rndseed();
    }
  if ($safeeval) {   if ($safeeval) {
     &Apache::lonxml::debug("Setting rndseed to $rndseed");      &Apache::lonxml::debug("Setting rndseed to $rndseed");
     &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);      &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
  }   }
     }      }
     return $rndseed;      return $rndseed;
 }  }
   
   sub remember_problem_state {
       return '
          <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
          <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
          <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
   }
   
 sub problem_edit_header {  sub problem_edit_header {
     return '<input type="hidden" name="submitted" value="edit" />      return '<input type="hidden" name="submitted" value="edit" />'.
    &Apache::structuretags::remember_problem_state().'
   <div class="LC_edit_problem_header">
   <div class="LC_edit_problem_header_title">
   '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
   </div>
   <div class="LC_edit_problem_discards">
        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />         <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
        <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />         <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
        <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />         <input '.&Apache::edit::submit_ask_anyway().' type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
        <input type="submit" name="Undo" value="'.&mt('undo').'" /> <hr />         <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
        <input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />  </div>
        <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" /><br /><p>&nbsp;</p><table border="0"><tr><td bgcolor="#DDDDDD">  <div class="LC_edit_problem_saves">
       ';         <input type="submit" name="submit" accesskey="s" value="'.&mt('Save and Edit').'" />
          <input type="submit" name="submit" accesskey="v" value="'.&mt('Save and View').'" />
     </div>
   <hr class="LC_edit_problem_divide" />
   </div>
   '.
          '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
 }  }
   
 sub problem_edit_footer {  sub problem_edit_footer {
     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />      return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />';      <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
       &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
       "\n</form>\n".&Apache::loncommon::end_page();
   }
   
   sub option {
       my ($value,$name) = @_;
       my $result ="<option value='".$value."' ";
       if ($env{'form.'.$name} eq $value) {
    $result.=" selected='on' ";
       }
       $result.='>';
       return $result;
 }  }
   
 sub problem_web_to_edit_header {  sub problem_web_to_edit_header {
     my ($rndseed)=@_;      my ($rndseed)=@_;
     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />      my $result .= '<div class="LC_edit_problem_header">';
              <input type="submit" name="problemmode" value="'.&mt('Edit').'" />  
              <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />      if (!$Apache::lonhomework::parsing_a_task) {
              <input type="submit" name="newrandomization" value="'.&mt('New Randomization').'" />   $result .= 
              <input type="submit" name="resetdata" value="'.&mt('Reset Submissions').'" />      '<div class="LC_edit_problem_header_title">'.
              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />      &mt('Problem Testing').
               <input type="text" name="rndseed" width="10" value="'.      &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
       '</div>';
       } else {
    $result .= 
       '<div class="LC_edit_problem_header_title">'.
       &mt('Task Testing').
       '</div>';
       }
       
       my $show_all_foils_text = 
    ($Apache::lonhomework::parsing_a_task) ?
    &mt('&nbsp;Show&nbsp;All&nbsp;Instances')
    : &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
   
       my $show_all= '<span class="LC_nobreak"><label><input type="checkbox" name="showallfoils" ';
       if (defined($env{'form.showallfoils'})) { $show_all.='checked="checked"'; }
       $show_all.= ' />'.$show_all_foils_text.'</label></span>';
   
   
   
       $result .= '<div class="LC_edit_problem_header_status_row">';
       if (!$Apache::lonhomework::parsing_a_task) {
    $result.="
   <div class='LC_edit_problem_header_row1'>
   <span class=\"LC_nobreak\">
   ".&mt("Problem Status:")."
   <select name='problemstate'>
     <option value=''></option>
     ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
     ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
     ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
     ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
     ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
   </select>
   </span>
   <span class=\"LC_nobreak\">
   ".&mt("Problem Type:")."
   <select name='problemtype'>
     <option value=''></option>
     ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
     ".&option('problem','problemtype').&mt("Homework problem")."</option>
     ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
   </select>
   </span>
   $show_all
   </div>
   <div class='LC_edit_problem_header_row2'>
   <span class=\"LC_nobreak\">
   ".&mt("Feedback Mode:")."
   <select name='problemstatus'>
     <option value=''></option>
     ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
     ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
     ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
   </select>
   </span>
   ";
   
       } elsif ($Apache::lonhomework::parsing_a_task) {
    $result.="
   <div class='LC_edit_problem_header_row1'>
   <span class=\"LC_nobreak\">
   ".&mt("Problem Status:")."
   <select name='problemstate'>
     <option value=''></option>
     ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
     ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
     ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
     ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
   </select>
   </span>
   $show_all
   ";
       }
   
       $result.='
          <span class="LC_nobreak">
          '.&mt('Apply style file: ').'
            <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
            <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
          </span>
        </div>
        <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
        <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
        <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
      </div>
      <hr class="LC_edit_problem_divide" />
      <div class="LC_edit_problem_header_randomize_row">
        <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
        <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
        <input type="text" name="rndseed" size="10" value="'.
        $rndseed.'"         $rndseed.'"
            onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>               onchange="javascript:document.lonhomework.changerandseed.click()" />';
              <input type="checkbox" name="showallfoils" ';  
     if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }      if (!$Apache::lonhomework::parsing_a_task) {
     $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').'   my $numtoanalyze=$env{'form.numtoanalyze'};
              <hr />';   if (!$numtoanalyze) { $numtoanalyze=20; }
     my $numtoanalyze=$ENV{'form.numtoanalyze'};   $result .= '<span class="LC_nobreak">'.
     if (!$numtoanalyze) { $numtoanalyze=20; }      &mt('[_1] for [_2] versions.',
     $result.= '<input type="submit" name="problemmode" value='.   '<input type="submit" name="problemmode" value='.&mt('"Calculate answers').'" />',
  &mt('"Calculate answers').'" /> for   '<input type="text" name="numtoanalyze" value="'.
              <input type="text" name="numtoanalyze" value="'.   $numtoanalyze.'" size="5" />').
      $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').   &Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
      '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",   '</span>';
      '',undef,undef,300).      
      '<hr />';      }
   
       $result.='
      </div>
      <div class="LC_edit_problem_header_edit_row">';
       $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
       $result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
       $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />';
   
       $result.='
      </div>
   </div>';
     return $result;      return $result;
 }  }
   
 sub initialize_storage {  sub initialize_storage {
     %Apache::lonhomework::results=();      my ($given_symb) = @_;
     %Apache::lonhomework::history=();      undef(%Apache::lonhomework::results);
     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();      undef(%Apache::lonhomework::history);
     if ($ENV{'request.state'} eq 'construct' || $symb eq '') {      my ($symb,$courseid,$domain,$name) = 
    &Apache::lonnet::whichuser($given_symb);
       
       # anonymous users (CODEd exams) have no data
       if ($name eq 'anonymous' 
    && !defined($domain)) {
    return;
       }
   
       if ($env{'request.state'} eq 'construct' 
    || $symb eq ''
    || $Apache::lonhomework::type eq 'practice') {
   
    my $namespace = $symb || $env{'request.uri'};
    if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
       ($env{'form.resetdata'} eq &mt('New Problem Variation')
        && $env{'form.submitted'} eq 'yes') ||
       $env{'form.newrandomization'} eq &mt('New Randomization')) {
       &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
       &Apache::lonxml::debug("Attempt reset");
    }
  %Apache::lonhomework::history=   %Apache::lonhomework::history=
     &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);      &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
  my ($temp)=keys %Apache::lonhomework::history ;   my ($temp)=keys %Apache::lonhomework::history ;
  &Apache::lonxml::debug("Return message of $temp");   &Apache::lonxml::debug("Return message of $temp");
     } else {      } else {
  %Apache::lonhomework::history=   %Apache::lonhomework::history=
     &Apache::lonnet::restore($symb,$courseid,$domain,$name);      &Apache::lonnet::restore($symb,$courseid,$domain,$name);
     }      }
   
     #ignore error conditions      #ignore error conditions
     my ($temp)=keys %Apache::lonhomework::history ;      my ($temp)=keys %Apache::lonhomework::history ;
     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }      if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
Line 244  sub initialize_storage { Line 510  sub initialize_storage {
 # Stores away the result has to a student's environment  # Stores away the result has to a student's environment
 # checks form.grade_ for specific values, other wises stores  # checks form.grade_ for specific values, other wises stores
 # to the running users environment  # to the running users environment
   # Will increment totals for attempts, students, and corrects
   # if running user has student role.  
 sub finalize_storage {  sub finalize_storage {
       my ($given_symb) = @_;
     my $result;      my $result;
     my ($temp) = keys %Apache::lonhomework::results;      if (%Apache::lonhomework::results) {
     if ( $temp ne '' ) {   my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
  my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();   delete(@Apache::lonhomework::results{@remove});
  if ($ENV{'request.state'} eq 'construct' || $symb eq '') {   my ($symb,$courseid,$domain,$name) = 
     $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};      &Apache::lonnet::whichuser($given_symb);
    if ($env{'request.state'} eq 'construct' 
       || $symb eq ''
       || $Apache::lonhomework::type eq 'practice') {
       my $namespace = $symb || $env{'request.uri'};
       $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
     $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,      $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
  $ENV{'request.uri'},'',$domain,$name);        $namespace,'',$domain,$name);
     &Apache::lonxml::debug('Construct Store return message:'.$result);      &Apache::lonxml::debug('Construct Store return message:'.$result);
  } else {   } else {
     $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,      $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
     $symb,$courseid,$domain,$name);      $symb,$courseid,$domain,$name);
     &Apache::lonxml::debug('Store return message:'.$result);      &Apache::lonxml::debug('Store return message:'.$result);
               if ($env{'request.role'} =~/^st/) {
                   &store_aggregates($symb,$courseid);
               }
  }   }
       } else {
    &Apache::lonxml::debug('Nothing to store');
     }      }
     return $result;      return $result;
 }  }
   
   # -------------------------------------------------------------store_aggregates
   # Sends hash of values to be incremented in nohist_resourcetracker.db
   # for the course. Increments total number of attempts, unique students 
   # and corrects for each part for an instance of a problem, as appropriate.
   sub store_aggregates {
       my ($symb,$courseid) = @_;
       my %aggregate;
       my @parts;
       my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
       my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
       foreach my $key (keys(%Apache::lonhomework::results)) {
           if ($key =~ /resource\.([^\.]+)\.tries/) {
               push(@parts, $1);
           }
       }
       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".$part."\0correct"} = 1;
           }
           if ($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 (keys (%aggregate) > 0) {
    &Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
                               $cdomain,$cname);
       }
   }
   
 sub checkout_msg {  sub checkout_msg {
     my %lt=&Apache::lonlocal::texthash(       my %lt=&Apache::lonlocal::texthash( 
  'resource'=>'The resource needs to be checked out',   'resource'=>'The resource needs to be checked out',
Line 270  sub checkout_msg { Line 589  sub checkout_msg {
                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',                  'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                 'checkout'=>'Check out Exam for Viewing',                  'checkout'=>'Check out Exam for Viewing',
  'checkout?'=>'Check out Exam?');   'checkout?'=>'Check out Exam?');
       my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
     return (<<ENDCHECKOUT);      return (<<ENDCHECKOUT);
 <h2>$lt{'resource'}</h2>  <h2>$lt{'resource'}</h2>
     <p>$lt{'id_expln'}</p>      <p>$lt{'id_expln'}</p>
 <font color="red">  <font color="red">
 <p>$lt{'warning'}</p>  <p>$lt{'warning'}</p>
 </font>  </font>
 <form name="checkout" method="POST" action="$ENV{'request.uri'}">  <form name="checkout" method="POST" action="$uri">
 <input type="hidden" name="doescheckout" value="yes" />  <input type="hidden" name="doescheckout" value="yes" />
 <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />  <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
 </form>  </form>
 ENDCHECKOUT  ENDCHECKOUT
 }  }
   
   sub firstaccess_msg {
       my ($time,$symb)=@_;
       my ($map)=&Apache::lonnet::decode_symb($symb);
       my $foldertitle=&Apache::lonnet::gettitle($map);
       &Apache::lonxml::debug("map is $map title is $foldertitle");
       my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
       return (<<ENDCHECKOUT);
   <h2>The resources in "$foldertitle" are open for a limited time. Once you click the 'Show Resource' button below you have $time to complete all resources "$foldertitle".</h2>
   <form name="markaccess" method="POST" action="$uri">
   <input type="hidden" name="markaccess" value="yes" />
   <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
   </form>
   ENDCHECKOUT
   }
   
 sub init_problem_globals {  sub init_problem_globals {
     my ($type)=@_;      my ($type)=@_;
     #initialize globals      #initialize globals
       #   For problems, we start out in part 0 (outside a <part> tag).
       #   and part 0 is used to describe the main body of the <problem>
       #
     if ($type eq 'problem') {      if ($type eq 'problem') {
  $Apache::inputtags::part='0';   $Apache::inputtags::part='0';
  @Apache::inputtags::partlist=('0');   @Apache::inputtags::partlist=('0');
  $Apache::lonhomework::problemstatus=   &Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
     &Apache::lonnet::EXT('resource.0.problemstatus');   $Apache::lonhomework::ignore_response_errors=0;
     } else {  
       } elsif ($type eq 'library') {
  $Apache::inputtags::part='';   $Apache::inputtags::part='';
  @Apache::inputtags::partlist=();   @Apache::inputtags::partlist=();
  $Apache::lonhomework::problemstatus='';   &Apache::lonhomework::reset_show_problem_status();
    $Apache::lonhomework::ignore_response_errors=1;
   
       } elsif ($type eq 'Task') {
    $Apache::inputtags::part='0';
    @Apache::inputtags::partlist=('0');
    &Apache::lonhomework::reset_show_problem_status();
    $Apache::lonhomework::ignore_response_errors=1;
     }      }
     @Apache::inputtags::responselist = ();      @Apache::inputtags::responselist = ();
     @Apache::inputtags::importlist = ();      @Apache::inputtags::importlist = ();
Line 306  sub init_problem_globals { Line 652  sub init_problem_globals {
     @Apache::structuretags::whileline=();      @Apache::structuretags::whileline=();
     $Apache::lonhomework::scantronmode=0;      $Apache::lonhomework::scantronmode=0;
     undef($Apache::lonhomework::name);      undef($Apache::lonhomework::name);
       undef($Apache::lonhomework::default_type);
       undef($Apache::lonhomework::type);
 }  }
   
 sub reset_problem_globals {  sub reset_problem_globals {
Line 318  sub reset_problem_globals { Line 665  sub reset_problem_globals {
 #detect if we try to do 2 problems in one file  #detect if we try to do 2 problems in one file
 #   undef($Apache::lonhomework::parsing_a_problem);  #   undef($Apache::lonhomework::parsing_a_problem);
     undef($Apache::lonhomework::name);      undef($Apache::lonhomework::name);
       undef($Apache::lonhomework::default_type);
       undef($Apache::lonhomework::type);
       undef($Apache::lonhomework::scantronmode);
       undef($Apache::lonhomework::ignore_response_errors);
       &Apache::lonhomework::reset_show_problem_status();
   }
   
   sub set_problem_state {
       my ($part)=@_;
       if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
    $Apache::lonhomework::history{"resource.$part.solved"}=
       'correct_by_student';
       }
   }
   
   sub get_problem_status {
       my ($part)=@_;
       my $problem_status;
       if ($env{'request.state'} eq 'construct' &&
    defined($env{'form.problemstatus'})) {
    $problem_status=$env{'form.problemstatus'};
       } else {
    $problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
    &Apache::lonxml::debug("problem status for $part is $problem_status");
    &Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
       }
       return $problem_status;
 }  }
   
 sub start_problem {  sub start_problem {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
       # We'll use the redirection to fix up printing of duedates.
       if (!$Apache::lonxml::metamode) {
    &Apache::lonxml::startredirection();
       }
   
       # Problems don't nest and we don't allow more than one <problem> in
       # a .problem file.
       #
     if ( $Apache::inputtags::part ne '' ||      if ( $Apache::inputtags::part ne '' ||
  $Apache::lonhomework::parsing_a_problem) {   $Apache::lonhomework::parsing_a_problem) {
  &Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');   &Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
  #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);   #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
  return '';   return '';
     }      }
   
     $Apache::lonhomework::parsing_a_problem=1;      $Apache::lonhomework::parsing_a_problem=1;
     &init_problem_globals('problem');      &init_problem_globals('problem');
   
     if (defined($ENV{'scantron.maxquest'})) {      if (defined($env{'scantron.maxquest'})) {
  $Apache::lonhomework::scantronmode=1;   $Apache::lonhomework::scantronmode=1;
     }      }
   
     if ($target ne 'analyze') {      if ($target ne 'analyze') {
  &initialize_storage();  
  if ($target eq 'web') {  
     &Apache::lonhomework::showhash(%Apache::lonhomework::history);  
  }  
  $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');   $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
    if (($env{'request.state'} eq 'construct') &&
       defined($env{'form.problemtype'})) {
       $Apache::lonhomework::type=$env{'form.problemtype'};
    }
  &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");   &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
     }      }
     if ($Apache::lonhomework::type eq '' ) {      if ($Apache::lonhomework::type eq '' ) {
  my $uri=$ENV{'request.uri'};   my $uri=$env{'request.uri'};
  if ($uri=~/\.(\w+)$/) {   if ($uri=~/\.(\w+)$/) {
     $Apache::lonhomework::type=$1;      $Apache::lonhomework::type=$1;
     &Apache::lonxml::debug("Using type of $1");      &Apache::lonxml::debug("Using type of $1");
Line 355  sub start_problem { Line 737  sub start_problem {
     &Apache::lonxml::debug("Using default type, problem, :$uri:");      &Apache::lonxml::debug("Using default type, problem, :$uri:");
  }   }
     }      }
       $Apache::lonhomework::default_type = $Apache::lonhomework::type;
   
       &initialize_storage();
       if ($target ne 'analyze'
           && $env{'request.state'} eq 'construct') {
    &set_problem_state('0');
       }
   
       if ($target eq 'web') {
    &Apache::lonxml::debug(" grading history ");
    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
       }
   
     #added vars to the scripting enviroment      #added vars to the scripting enviroment
     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';      my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
       $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
     &Apache::run::run($expression,$safeeval);      &Apache::run::run($expression,$safeeval);
     my $status;      my $status;
     my $accessmsg;      my $accessmsg;
   
     #should get back a <html> or the neccesary stuff to start XML/MathML      my $name= &get_resource_name($parstack,$safeeval);
     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=      my ($result,$form_tag_start);
  &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);      if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
     if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}   || $target eq 'edit') {
    ($result,$form_tag_start) =
       &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
    $name);
       }
   
       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); }
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
Line 374  sub start_problem { Line 775  sub start_problem {
  if ($Apache::lonhomework::type eq 'exam') {   if ($Apache::lonhomework::type eq 'exam') {
     my $token=      my $token=
  $Apache::lonhomework::history{"resource.0.outtoken"};   $Apache::lonhomework::history{"resource.0.outtoken"};
     if (($ENV{'form.doescheckout'}) && (!$token)) {      if (($env{'form.doescheckout'}) && (!$token)) {
  $token=&Apache::lonxml::maketoken();   $token=&Apache::lonxml::maketoken();
  $Apache::lonhomework::history{"resource.0.outtoken"}=   $Apache::lonhomework::history{"resource.0.outtoken"}=
     $token;      $token;
     }      }
     $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);      $result.=&Apache::lonxml::printtokenheader($target,$token);
    }
    if ($env{'form.markaccess'}) {
       &Apache::lonnet::set_first_access('map');
  }   }
   
  #handle rand seed in construction space   #handle rand seed in construction space
  my $rndseed=&setup_rndseed($safeeval);   my $rndseed=&setup_rndseed($safeeval);
  my ($symb)=&Apache::lonxml::whichuser();   my ($symb)=&Apache::lonnet::whichuser();
  if ($ENV{'request.state'} ne "construct" && $symb eq '') {   if ($env{'request.state'} ne "construct" && 
       ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
     $form_tag_start.='<input type="hidden" name="rndseed" value="'.      $form_tag_start.='<input type="hidden" name="rndseed" value="'.
  $rndseed.'" />'.   $rndseed.'" />'.
     '<input type="submit" name="resetdata"      '<input type="submit" name="resetdata"
                              value="'.&mt('New Problem Variation').'" />'.                               value="'.&mt('New Problem Variation').'" />';
       if (exists($env{'form.username'})) {
    $form_tag_start.=
     '<input type="hidden" name="username"      '<input type="hidden" name="username"
                              value="'.$ENV{'form.username'}.'" /> <br />';                               value="'.$env{'form.username'}.'" />';
       }
       if ($env{'request.role.adv'}) {
    $form_tag_start.=
       ' <label><input type="checkbox" name="showallfoils" ';
    if (defined($env{'form.showallfoils'})) {
       $form_tag_start.='checked="on"';
    }
    $form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
       '</label>';
       }
       $form_tag_start.='<hr />';
  }   }
  ($status,$accessmsg) = &Apache::lonhomework::check_access('0');  
    ($status,$accessmsg,my $slot_name,my $slot) = 
       &Apache::lonhomework::check_slot_access('0','problem');
  push (@Apache::inputtags::status,$status);   push (@Apache::inputtags::status,$status);
   
  my $expression='$external::datestatus="'.$status.'";';   my $expression='$external::datestatus="'.$status.'";';
  $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';   $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
  &Apache::run::run($expression,$safeeval);   &Apache::run::run($expression,$safeeval);
  &Apache::lonxml::debug("Got $status");   &Apache::lonxml::debug("Got $status");
   
  if (( $status eq 'CLOSED' ) ||   if (( $status eq 'CLOSED' ) ||
     ( $status eq 'UNCHECKEDOUT') ||      ( $status eq 'UNCHECKEDOUT') ||
       ( $status eq 'NOT_YET_VIEWED') ||
     ( $status eq 'BANNED') ||      ( $status eq 'BANNED') ||
     ( $status eq 'UNAVAILABLE') ||      ( $status eq 'UNAVAILABLE') ||
       ( $status eq 'NOT_IN_A_SLOT') ||
     ( $status eq 'INVALID_ACCESS')) {      ( $status eq 'INVALID_ACCESS')) {
     my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);      my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
          $style);
     if ( $target eq "web" ) {      if ( $target eq "web" ) {
  $result.= $head_tag_start.'</head>';   my $msg;
  my $msg=$body_tag_start;  
  if ($status eq 'UNAVAILABLE') {   if ($status eq 'UNAVAILABLE') {
     $result.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';      $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
  } else {   } elsif ($status ne 'NOT_YET_VIEWED') {
     $result.='<h1>'.&mt('Not open to be viewed').'</h1>';      $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
  }   }
  if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {   if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
     $msg.='The problem '.$accessmsg;      $msg.=&mt('The problem ').$accessmsg;
  } elsif ($status eq 'UNCHECKEDOUT') {   } elsif ($status eq 'UNCHECKEDOUT') {
     $msg.=&checkout_msg;      $msg.=&checkout_msg();
    } elsif ($status eq 'NOT_YET_VIEWED') {
       $msg.=&firstaccess_msg($accessmsg,$symb);
    } elsif ($status eq 'NOT_IN_A_SLOT') {
       $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
  }   }
  $result.=$msg.'<br />';   $result.=$msg.'<br />';
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';   my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                       : '\begin{minipage}{\textwidth}';
    $result.='\begin{document}\noindent \vskip 1 mm '.
       $startminipage.'\vskip 0 mm';
  if ($status eq 'UNAVAILABLE') {   if ($status eq 'UNAVAILABLE') {
     $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';      $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
  } else {   } else {
     $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";      $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
  }   }
     }      }
  } elsif ($target eq 'web') {   } elsif ($status eq 'NEEDS_CHECKIN') {
     my $name= &get_resource_name($parstack,$safeeval);      my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
     if ($status eq 'CAN_ANSWER') {         $style);
  # create a page header and exit      if ($target eq 'web') {
  $result.="$head_tag_start<title>$name</title></head>   $result .= 
               $body_tag_start \n $form_tag_start".      &Apache::bridgetask::proctor_validation_screen($slot);
   '<input type="hidden" name="submitted" value="yes" />';      } elsif ($target eq 'grade') {
  if ($ENV{'request.state'} eq "construct") {   &Apache::bridgetask::proctor_check_auth($slot_name,$slot,
     $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});   'problem');
  }  
  # if we are viewing someone else preserve that info  
  if (defined $ENV{'form.grade_symb'}) {  
     foreach my $field ('symb','courseid','domain','username') {  
  $result .= '<input type="hidden" name="grade_'.$field.  
     '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";  
     }  
  }  
     } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'  
      || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE' ||  
      $status eq 'INVALID_ACCESS') {  
  $result.=$head_tag_start.  
     "<title>$name</title></head>\n$body_tag_start\n";  
     }      }
  } elsif ($target eq 'tex') {   } elsif ($target eq 'web') {
     my $startminipage = '';      if ($status eq 'CAN_ANSWER' 
     if (not $ENV{'form.problem_split'}=~/yes/) {   && $slot_name ne ''
  $startminipage = '\begin{minipage}{\textwidth}';   && $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
     }   # unproctored slot access, self checkin
     my $id = $Apache::inputtags::part;   &Apache::bridgetask::check_in('problem',undef,undef,
     my $weight = &Apache::lonnet::EXT("resource.$id.weight");        $slot_name);
     my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');  
     my @allkeys = split /,/,$allkeys;  
     my $allow_print_points = 1;  
     foreach my $partial_key (@allkeys) {  
  if ($partial_key=~m/\_(\d*)\_weight/) {  
     if ($1 ne '0') {$allow_print_points=0;}  
  }  
     }      }
     my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");       $result.="\n $form_tag_start \t".
     $duedate = POSIX::strftime("%c",localtime($duedate));        '<input type="hidden" name="submitted" value="yes" />';
     my $temp_file;      # create a page header and exit
     my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";      if ($env{'request.state'} eq "construct") {
     if (-e $filename) {   $result.= &problem_web_to_edit_header($env{'form.rndseed'});
  $temp_file = Apache::File->new($filename);  
     } else {  
  $temp_file = Apache::File->new('>>'.$filename);  
     }      }
     my @due_file_content = <$temp_file>;      # if we are viewing someone else preserve that info
     my $due_file_content = $due_file_content[$#due_file_content];      if (defined $env{'form.grade_symb'}) {
     chomp $due_file_content;   foreach my $field ('symb','courseid','domain','username') {
     my $name_of_resourse= &get_resource_name($parstack,$safeeval);      $result .= '<input type="hidden" name="grade_'.$field.
     if ($due_file_content ne $duedate) {   '" value="'.$env{"form.grade_$field"}.'" />'."\n";
  $temp_file = Apache::File->new('>'.$filename);  
  print $temp_file "$duedate\n";  
  if (not $ENV{'request.symb'} =~ m/\.page_/) {  
     if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {  
  $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';  
     } else {  
  $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';  
  if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}  
     }  
  } else {  
     $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';  
  }  
     } else {  
  if (not $ENV{'request.symb'} =~ m/\.page_/) {  
     $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';  
     if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}  
  } else {  
     $result .= '\vskip 1mm \\\\\\\\';  
  }   }
     }      }
    } elsif ($target eq 'tex') {
       $result .= 'INSERTTEXFRONTMATTERHERE';
   
  }   }
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.   $result .= $form_tag_start.&problem_edit_header();
     &problem_edit_header();   $Apache::lonxml::warnings_error_header=
       &mt("Editor Errors - these errors might not effect the running of the problem, but they will likely cause problems with further use of the Edit mode. Please use the EditXML mode to fix these errors.")."<br />";
  my $temp=&Apache::edit::insertlist($target,$token);   my $temp=&Apache::edit::insertlist($target,$token);
  $result.=$temp;   $result.=$temp;
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  $result=$token->[4];   $result=$token->[4];
  $result.=&Apache::edit::handle_insert();  
     } else {      } else {
  # page_start returned a starting result, delete it if we don't need it   # page_start returned a starting result, delete it if we don't need it
  $result = '';   $result = '';
Line 517  sub start_problem { Line 909  sub start_problem {
   
 sub end_problem {  sub end_problem {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result='';      my $result;
   
       if (!$Apache::lonxml::metamode) {
    $result = &Apache::lonxml::endredirection(); #started in &start_problem
    $Apache::lonxml::post_evaluate=0;
       }
   
       if ($target eq 'tex') {
    # Figure out the front matter and replace the
    # INSERTTEXFRONTMATTERHERE in result with it.  note that we do
    # this in end_problem because whether or not we display due
    # dates depends on whether due dates have already been
    # displayed in the problem parts.
   
    my $frontmatter   = '';
    my $startminipage = '';
    if (not $env{'form.problem_split'}=~/yes/) {
       $startminipage = '\begin{minipage}{\textwidth}';
    }
    my $id = $Apache::inputtags::part;
    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
    my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
    my @packages = split /,/,$packages;
    my $allow_print_points = 0;
    foreach my $partial_key (@packages) {
       if ($partial_key=~m/^part_0$/) {
    $allow_print_points=1;
       }
    }
    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
    if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
    if (lc($env{'course.'.$env{'request.course.id'}.
    '.disableexampointprint'}) eq 'yes') {
       $allow_print_points=0;
    }
    my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
    my $begin_doc='\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
    my $toc_line='\vskip 1 mm\noindent '.$startminipage.
       '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
   
    #  Figure out what the due date is and if we need to print
    #  it in the problem header.  We have been logging the
    #  last due date written to file. 
   
    my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
    my $duedate = POSIX::strftime("%c",localtime($duetime));
    my $temp_file;
    my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
   
    # Figure out what the last printed due date is or set it
    # to the epoch if no duedates have been printed.
   
    my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
    if (-e $filename) {
       $temp_file = Apache::File->new($filename);
       my @due_file      = <$temp_file>;
       $due_file_content = $due_file[$#due_file];
       chomp $due_file_content;
    } 
   
    # We display the due date iff it is not the same as the last
    # duedate in problem header ($due_file_content), and
    # none of our parts displayed a duedate.
    #
    my $parts_with_displayduedate;
    if (defined $Apache::outputtags::showonce{'displayduedate'}) {
       $parts_with_displayduedate = 
    scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
    } else {
       $parts_with_displayduedate = 0;
    }
    if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
       $temp_file = Apache::File->new('>'.$filename);
       print $temp_file "$duetime\n";
       if (not $env{'request.symb'} =~ m/\.page_/) {
    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
       $frontmatter .= $begin_doc.
    '\textit{Due date: '.$duedate.'} '.$toc_line;
    } else {
       $frontmatter.= $begin_doc.$toc_line;
       if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
    }
       } else {
    $frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'.$startminipage;
       }
    } else {
       if (not $env{'request.symb'} =~ m/\.page_/) {
    $frontmatter .= $begin_doc.$toc_line;
    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
       } else {
    $frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
       }
    }
    $result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
       }
   
     my $status=$Apache::inputtags::status['-1'];      my $status=$Apache::inputtags::status['-1'];
     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 'tex') {
  if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&   if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
      $status eq 'CAN_ANSWER' ) {  
     # if part is zero, no <part>s existed, so we need to the grading      # if part is zero, no <part>s existed, so we need to the grading
     &Apache::inputtags::grade;      if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
    &Apache::inputtags::grade;
       } elsif ($status eq 'NEEDS_CHECKIN') {
    # no need to grade, and don't want to hide data
       } else {
    # move any submission data to .hidden
    &Apache::inputtags::hidealldata($Apache::inputtags::part);
       }
  } elsif ( ($target eq 'web' || $target eq 'tex') &&   } elsif ( ($target eq 'web' || $target eq 'tex') &&
   $Apache::inputtags::part eq '0' &&    $Apache::inputtags::part eq '0' &&
   $status ne 'UNCHECKEDOUT') {    $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
     # if part is zero, no <part>s existed, so we need show the current      # if part is zero, no <part>s existed, so we need show the current
     # grading status      # grading status
     my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);      my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
     $result.= $gradestatus;      $result.= $gradestatus;
  }   }
  if (   if (
     (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||      (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
     ($target eq 'answer') || ($target eq 'tex')      ($target eq 'answer') || ($target eq 'tex')
    ) {     ) {
     if ($status eq 'CAN_ANSWER') {      if ($target ne 'tex' &&
  if ($target ne 'tex' &&   $env{'form.answer_output_mode'} ne 'tex') {
     $ENV{'form.answer_output_mode'} ne 'tex') {   $result.="</form>";
     $result.="</form></body>\n";   $result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
  }  
     } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||  
     $status eq 'UNCHECKEDOUT' || $status eq 'INVALID_ACCESS') {  
  if ($target ne 'tex' &&  
     $ENV{'form.answer_output_mode'} ne 'tex') {  
     $result.="</body>\n";  
  }  
     }      }
     if ($target eq 'web') {      if ($target eq 'web') {
  $result.=&Apache::lonxml::xmlend();   $result.= &Apache::loncommon::end_page({'discussion' => 1});
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $endminipage = '';   my $endminipage = '';
  if (not $ENV{'form.problem_split'}=~/yes/) {   if (not $env{'form.problem_split'}=~/yes/) {
     $endminipage = '\end{minipage}';      $endminipage = '\end{minipage}';
  }   }
  $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';                  if ($env{'form.print_discussions'} eq 'yes') {
  if (not $ENV{'request.symb'} =~ m/\.page_/) {      $result.=&Apache::lonxml::xmlend($target,$parser);
     $result .= $endminipage.'\end{document} ';  
  } else {   } else {
     $result .= '';      $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
       if (not $env{'request.symb'} =~ m/\.page_/) {
    $result .= $endminipage.'\end{document} ';
       } else {
    $result .= $endminipage;
       }
  }   }
     }      }
  }   }
Line 568  sub end_problem { Line 1058  sub end_problem {
     &Apache::lonhomework::showhash(%Apache::lonhomework::results);      &Apache::lonhomework::showhash(%Apache::lonhomework::results);
     &finalize_storage();      &finalize_storage();
  }   }
  if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')   if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
     && $ENV{'form.answer_output_mode'} ne 'tex') {      && $env{'form.answer_output_mode'} ne 'tex') {
     $result.='</html>'; # normally we get it from xmlend, but in CSTR      $result.=&Apache::loncommon::end_page({'discussion' => 1});
                           # normally we get it from above, but in CSTR
                         # we always show answer mode too.                          # we always show answer mode too.
  }   }
     } elsif ($target eq 'meta') {      } elsif ($target eq 'meta') {
Line 579  sub end_problem { Line 1070  sub end_problem {
     $result=&Apache::response::mandatory_part_meta;      $result=&Apache::response::mandatory_part_meta;
  }   }
  $result.=&Apache::response::meta_part_order();   $result.=&Apache::response::meta_part_order();
    $result.=&Apache::response::meta_response_order();
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  &Apache::lonxml::debug("in end_problem with $target, edit");   &Apache::lonxml::debug("in end_problem with $target, edit");
  $result = &problem_edit_footer();   $result .= &problem_edit_footer();
       } elsif ($target eq 'modified') {
    $result .= $token->[2];
     }      }
   
     if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {      if ($env{'request.state'} eq 'construct' && $target eq 'web') {
  &Apache::inputtags::check_for_duplicate_ids();   &Apache::inputtags::check_for_duplicate_ids();
     }      }
   
Line 596  sub end_problem { Line 1090  sub end_problem {
   
 sub start_library {  sub start_library {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);      my ($result,$form_tag_start);
     if ($$tagstack[0] eq 'library') { &init_problem_globals('library') };      if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
    &init_problem_globals('library');
    $Apache::lonhomework::type='problem';
       }
     if ($target eq 'edit') {      if ($target eq 'edit') {
  ($result,$head_tag_start,$body_tag_start,$form_tag_start)=   ($result,$form_tag_start)=
     &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);      &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
  $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.   'Edit');
     &problem_edit_header();   $result.=$form_tag_start.&problem_edit_header();
  my $temp=&Apache::edit::insertlist($target,$token);   my $temp=&Apache::edit::insertlist($target,$token);
  $result.=$temp;   $result.=$temp;
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  $result=$token->[4];   $result=$token->[4];
  $result.=&Apache::edit::handle_insert();      } elsif (($target eq 'web' || $target eq 'webgrade')
     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&       && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
      $ENV{'request.state'} eq "construct" ) {       && $env{'request.state'} eq "construct" ) {
  ($result,$head_tag_start,$body_tag_start,$form_tag_start)=  
     &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);  
  my $name=&get_resource_name($parstack,$safeeval);   my $name=&get_resource_name($parstack,$safeeval);
    ($result,$form_tag_start)=
       &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
    $name);
  my $rndseed=&setup_rndseed($safeeval);   my $rndseed=&setup_rndseed($safeeval);
  $result.="$head_tag_start<title>$name</title></head>   $result.=" \n $form_tag_start".
               $body_tag_start \n $form_tag_start".  
   '<input type="hidden" name="submitted" value="yes" />';    '<input type="hidden" name="submitted" value="yes" />';
  $result.=&problem_web_to_edit_header($rndseed);   $result.=&problem_web_to_edit_header($rndseed);
     }      }
Line 627  sub end_library { Line 1124  sub end_library {
     my $result='';      my $result='';
     if ($target eq 'edit') {      if ($target eq 'edit') {
  $result=&problem_edit_footer();   $result=&problem_edit_footer();
     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&      } elsif ($target eq 'web' 
      $ENV{'request.state'} eq "construct") {       && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
  $result.='</form></body>'.&Apache::lonxml::xmlend();       && $env{'request.state'} eq "construct") {
    $result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
       }
       if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
    &reset_problem_globals('library');
     }      }
     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };  
     return $result;      return $result;
 }  }
   
 sub start_definetag {  sub start_definetag {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
     my $result;      my $result;
   
     my $name = $token->[2]->{'name'};      my $name = $token->[2]->{'name'};
     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);      my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
     if ($name=~/^\//) {      if ($target eq 'web') {
  $result=   if ($name=~/^\//) {
  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';      $result=
     } else {   '<br /><table class="LC_sty_end"><tr><th>'.
  $result=   &mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';   } else {
       $result=
    '<br /><table class="LC_sty_begin"><tr><th>'.
    &mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
    }
    $skip = &HTML::Entities::encode($skip, '<>&"');
    $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
     }      }
     $skip=~s/\</\&lt\;/gs;  
     $skip=~s/\>/\&gt\;/gs;  
     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';  
     return $result;      return $result;
 }  }
   
Line 664  sub start_block { Line 1167  sub start_block {
   
     my $result;      my $result;
   
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||      if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
  $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
  my $code = $token->[2]->{'condition'};   my $code = $token->[2]->{'condition'};
  if (defined($code)) {   if (defined($code) && $code ne '') {
     if (!$Apache::lonxml::default_homework_loaded) {      if (!$Apache::lonxml::default_homework_loaded) {
  &Apache::lonxml::default_homework_load($safeeval);   &Apache::lonxml::default_homework_load($safeeval);
     }      }
Line 708  sub start_languageblock { Line 1211  sub start_languageblock {
   
     my $result;      my $result;
   
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||      if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
  $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
  my $include = $token->[2]->{'include'};   my $include = $token->[2]->{'include'};
  my $exclude = $token->[2]->{'exclude'};   my $exclude = $token->[2]->{'exclude'};
         my %languages=&Apache::loncommon::display_languages();          my @preferred_languages=&Apache::loncommon::preferred_languages();
         $result='1';  # This should not even happen, since we should at least have the server language
  if ($include) {          if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
             $result='';  # Now loop over all languages in order of preference
             foreach (split(/\,/,$include)) {          foreach my $preferred_language (@preferred_languages) {
                 if ($languages{$_}) { $result='1'; }  # If the languageblock has no arguments, show the contents
             }             $result=1;
  }             my $found=0;
         if ($exclude) {  # Do we have an include argument?
             foreach (split(/\,/,$exclude)) {     if ($include) {
                 if ($languages{$_}) { $result='0'; }  # If include is specified, by default, don't render the block
             }                $result=0;
  }                foreach my $included_language (split(/\,/,$include)) {
   # ... but if my preferred language is included, render it
                    if ($included_language eq $preferred_language) {
                       $result=1; 
                       $found=1; 
                    }
                 }
      }
   # Do we have an exclude argument?
              if ($exclude) {
                 $result=1;
                 foreach my $excluded_language (split(/\,/,$exclude)) {
                    if ($excluded_language eq $preferred_language) {
                       $result=0;
                       $found=1;
                    }
                 }
      }
              if ($found) { last; }
           }
  if ( ! $result ) {   if ( ! $result ) {
     my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,      my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
    $style);     $style);
Line 756  sub end_languageblock { Line 1278  sub end_languageblock {
     return $result;      return $result;
 }  }
   
   {
       my %available_texts;
       sub start_translated {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    &Apache::lonxml::register('Apache::structuretags',('lang'));
    undef(%available_texts);
       }
       
       sub end_translated {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result;
    #show the translation on viewable targets
    if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
       # or non-viewable targets, if it's embedded in something that
       # wants the output
       (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
        && &Apache::lonxml::in_redirection() ) ) {
       my @possibilities = keys(%available_texts);
       my $which = 
    &Apache::loncommon::languages(\@possibilities) || 'default';
       $result = $available_texts{$which};
    }
    undef(%available_texts);
    &Apache::lonxml::deregister('Apache::structuretags',('lang'));
    return $result;
       }
   
   
       sub start_lang {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
       $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
       &Apache::lonxml::startredirection();
    }
    return '';
       }
   
       sub end_lang {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
       $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
       my $result = &Apache::lonxml::endredirection();
       my $which = &Apache::lonxml::get_param('which',$parstack,
      $safeeval);
       $available_texts{$which} = $result;
    }
    return '';
       }
   }
   
 sub start_instructorcomment {  sub start_instructorcomment {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
     my $result;      my $result;
   
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||      if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
  $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
         $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);          $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
  if ( ! $result ) {   if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
     my $skip=&Apache::lonxml::get_all_text("/instructorcomment",      my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
    $parser,$style);     $parser,$style);
     &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");      &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
Line 787  sub end_instructorcomment { Line 1359  sub end_instructorcomment {
 }  }
   
 sub start_while {  sub start_while {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
     my $result;      my $result;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||      if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
  $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
  my $code = $token->[2]->{'condition'};   my $code = $token->[2]->{'condition'};
   
  push( @Apache::structuretags::whileconds, $code);   push( @Apache::structuretags::whileconds, $code);
Line 799  sub start_while { Line 1371  sub start_while {
     &Apache::lonxml::default_homework_load($safeeval);      &Apache::lonxml::default_homework_load($safeeval);
  }   }
  my $result = &Apache::run::run($code,$safeeval);   my $result = &Apache::run::run($code,$safeeval);
  my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);   my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
  push( @Apache::structuretags::whilebody, $bodytext);   push( @Apache::structuretags::whilebody, $bodytext);
  push( @Apache::structuretags::whileline, $token->[5]);   push( @Apache::structuretags::whileline, $token->[5]);
  &Apache::lonxml::debug("s code $code got -$result-");   &Apache::lonxml::debug("s code $code got -$result-");
Line 823  sub end_while { Line 1395  sub end_while {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;      my $result;
   
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||      if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
  $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
  my $code = pop(@Apache::structuretags::whileconds);   my $code = pop(@Apache::structuretags::whileconds);
  my $bodytext = pop(@Apache::structuretags::whilebody);   my $bodytext = pop(@Apache::structuretags::whilebody);
  my $line = pop(@Apache::structuretags::whileline);   my $line = pop(@Apache::structuretags::whileline);
Line 837  sub end_while { Line 1409  sub end_while {
  $return = 0; $error=1; next;   $return = 0; $error=1; next;
     }      }
     $result.=&Apache::scripttag::xmlparse($bodytext);      $result.=&Apache::scripttag::xmlparse($bodytext);
       if ($target eq 'grade' || $target eq 'answer' ||
    $target eq 'analyze') {
    # grade/answer/analyze should produce no output but if we
    # are redirecting, the redirecter should know what to do
    # with the output
    if (!$Apache::lonxml::redirection) { undef($result); }
       }
     $return = &Apache::run::run($code,$safeeval);      $return = &Apache::run::run($code,$safeeval);
  }   }
  if ($error) {   if ($error) {
     &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occured while running &lt;while$gt; on line').' '.$line.'</pre>');      &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occured while running &lt;while&gt; on line').' '.$line.'</pre>');
  }   }
     } elsif ($target eq "edit") {      } elsif ($target eq "edit") {
  $result.= &Apache::edit::tag_end($target,$token,'');   $result.= &Apache::edit::tag_end($target,$token,'');
Line 855  sub end_while { Line 1434  sub end_while {
 #  ...  #  ...
 # </randomlist>  # </randomlist>
 sub start_randomlist {  sub start_randomlist {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;      my $result;
     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||      if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
  $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
  my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);   my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
  my $b_parser= HTML::TokeParser->new(\$body);   my $b_parser= HTML::LCParser->new(\$body);
    $b_parser->xml_mode(1);
    $b_parser->marked_sections(1);
  my $b_tok;   my $b_tok;
  my @randomlist;   my @randomlist;
  my $list_item;   my $list_item;
Line 884  sub start_randomlist { Line 1465  sub start_randomlist {
     #  print "<b>END-TAG $b_tok->[1]</b><br />";      #  print "<b>END-TAG $b_tok->[1]</b><br />";
     # }      # }
  }   }
  my @idx_arr = (0 .. $#randomlist);   if (@randomlist) {
  &Apache::structuretags::shuffle(\@idx_arr);      my @idx_arr = (0 .. $#randomlist);
  my $bodytext = '';      &Apache::structuretags::shuffle(\@idx_arr);
  my $show=$#randomlist;      my $bodytext = '';
  my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);      my $show=$#randomlist;
  $showarg--;      my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
  if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }      $showarg--;
  for(0 .. $show) {      if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
     $bodytext .= "$randomlist[ $idx_arr[$_] ]";      for(0 .. $show) {
    $bodytext .= "$randomlist[ $idx_arr[$_] ]";
       }
       &Apache::lonxml::newparser($parser,\$bodytext);
  }   }
  &Apache::lonxml::newparser($parser,\$bodytext);  
     } elsif ($target eq 'edit' ) {      } elsif ($target eq 'edit' ) {
  $result .=&Apache::edit::tag_start($target,$token);   $result .=&Apache::edit::tag_start($target,$token);
  $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',   $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
Line 911  sub start_randomlist { Line 1494  sub start_randomlist {
 sub shuffle {  sub shuffle {
     my $a=shift;      my $a=shift;
     my $i;      my $i;
     if (defined(@$a)) {      if (ref($a) eq 'ARRAY' && @$a) {
  &Apache::response::setrandomnumber();   &Apache::response::pushrandomnumber();
  for($i=@$a;--$i;) {   for($i=@$a;--$i;) {
     my $j=int(&Math::Random::random_uniform() * ($i+1));      my $j=int(&Math::Random::random_uniform() * ($i+1));
     next if $i == $j;      next if $i == $j;
     @$a[$i,$j] = @$a[$j,$i];      @$a[$i,$j] = @$a[$j,$i];
  }   }
    &Apache::response::poprandomnumber();
     }      }
 }  }
   
Line 931  sub end_randomlist { Line 1515  sub end_randomlist {
     return $result;      return $result;
 }  }
   
   sub ordered_show_check {
       my $last_part=$Apache::inputtags::partlist[-2];
       my $in_order=
    &Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
       my $in_order_show=1;
       if ($last_part ne '0' && lc($in_order) eq 'yes') {
    $in_order_show=&Apache::response::check_status($last_part);
       }
       return $in_order_show;
   }
   
 sub start_part {  sub start_part {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       if (!$Apache::lonxml::metamode) {
    &Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                                        # duedates.
       }
     my $result='';      my $result='';
     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);      my $id= &Apache::lonxml::get_id($parstack,$safeeval);
     if ($id eq '') { $id = $Apache::lonxml::curdepth; }  
     $Apache::inputtags::part=$id;      $Apache::inputtags::part=$id;
     push(@Apache::inputtags::partlist,$id);      push(@Apache::inputtags::partlist,$id);
     @Apache::inputtags::response=();      @Apache::inputtags::response=();
     @Apache::inputtags::previous=();      @Apache::inputtags::previous=();
     @Apache::inputtags::previous_version=();      @Apache::inputtags::previous_version=();
     $Apache::lonhomework::problemstatus=      &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
  &Apache::lonnet::EXT("resource.$id.problemstatus");      &Apache::response::reset_params();
   
     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);      my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
       my $newtype=&Apache::lonnet::EXT("resource.$id.type");
       if ($newtype) { $Apache::lonhomework::type=$newtype; }
       my $in_order_show=&ordered_show_check();
     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';      my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
       $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
     &Apache::run::run($expression,$safeeval);      &Apache::run::run($expression,$safeeval);
   
     if ($target eq 'meta') {      if ($target eq 'meta') {
  return &Apache::response::mandatory_part_meta;   my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
    return &Apache::response::mandatory_part_meta.
          &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
     } elsif ($target eq 'web' || $target eq 'grade' ||      } elsif ($target eq 'web' || $target eq 'grade' ||
      $target eq 'answer' || $target eq 'tex') {       $target eq 'answer' || $target eq 'tex') {
  if ($hidden) {   if ($hidden || !$in_order_show) {
     my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);      my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
  } else {   } else {
     my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);      my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
     push (@Apache::inputtags::status,$status);      push (@Apache::inputtags::status,$status);
     my $expression='$external::datestatus="'.$status.'";';      my $expression='$external::datestatus="'.$status.'";';
     $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';      $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
     &Apache::run::run($expression,$safeeval);      &Apache::run::run($expression,$safeeval);
       if ($env{'request.state'} eq 'construct') {
    &set_problem_state($Apache::inputtags::part); 
       }
     if (( $status eq 'CLOSED' ) ||      if (( $status eq 'CLOSED' ) ||
  ( $status eq 'UNCHECKEDOUT') ||   ( $status eq 'UNCHECKEDOUT') ||
    ( $status eq 'NOT_YET_VIEWED') ||
  ( $status eq 'BANNED') ||   ( $status eq 'BANNED') ||
  ( $status eq 'UNAVAILABLE') ||   ( $status eq 'UNAVAILABLE') ||
  ( $status eq 'INVALID_ACCESS')) {   ( $status eq 'INVALID_ACCESS')) {
  my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);   my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
      $style);
  if ( $target eq "web" ) {   if ( $target eq "web" ) {
     $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";      $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
  } elsif ( $target eq 'tex' ) {   } elsif ( $target eq 'tex' ) {
     if (not $ENV{'form.problem_split'}=~/yes/) {      if (not $env{'form.problem_split'}=~/yes/) {
  $result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";   $result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
     } else {      } else {
  $result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";   $result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
Line 976  sub start_part { Line 1586  sub start_part {
  }   }
     } else {      } else {
  if ($target eq 'tex') {   if ($target eq 'tex') {
     if (not $ENV{'form.problem_split'}=~/yes/) {      if (not $env{'form.problem_split'}=~/yes/) {
  $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';   if ($$tagstack[-2] eq 'td') {
       $result.='\noindent \begin{minipage}{\textwidth}\noindent';
    } else {
       $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
    }
     }      }
     my $weight = &Apache::lonnet::EXT("resource.$id.weight");      my $weight = &Apache::lonnet::EXT("resource.$id.weight");
     my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');      my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
     my @allkeys = split /,/,$allkeys;      my @allkeys = split /,/,$allkeys;
     my $allow_print_points = 0;      my $allow_print_points = 0;
     foreach my $partial_key (@allkeys) {      foreach my $partial_key (@allkeys) {
  if ($partial_key=~m/\_(\d*)\_weight/) {   if ($partial_key=~m/^part_(.*)$/) {
     if ($1 ne '0') {$allow_print_points=1;}      if ($1 ne '0') {$allow_print_points=1;}
  }   }
     }      }
       my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
       if (defined($maxtries) && $maxtries < 0) {
    $allow_print_points=0;
       }
       if (lc($env{'course.'.$env{'request.course.id'}.
       '.disableexampointprint'}) eq 'yes') {
    $allow_print_points=0;
       }
     if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}      if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
    } elsif ($target eq 'web') {
       $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
  }   }
     }      }
  }   }
Line 996  sub start_part { Line 1620  sub start_part {
  $result.=&Apache::edit::tag_start($target,$token);   $result.=&Apache::edit::tag_start($target,$token);
  $result.=&Apache::edit::text_arg('Part ID:','id',$token).   $result.=&Apache::edit::text_arg('Part ID:','id',$token).
     &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").      &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
       '&nbsp;&nbsp;'.
   &Apache::edit::text_arg('Displayed Part Description:','display',$token).
  &Apache::edit::end_row().&Apache::edit::start_spanning_row();   &Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
  my $constructtag=&Apache::edit::get_new_args($token,$parstack,   my $constructtag=&Apache::edit::get_new_args($token,$parstack,
      $safeeval,'id');       $safeeval,'id','display');
  if ($constructtag) {   if ($constructtag) {
       #limiting ids to only letters numbers, and space
       $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
     $result = &Apache::edit::rebuild_tag($token);      $result = &Apache::edit::rebuild_tag($token);
     $result.=&Apache::edit::handle_insert();  
  }   }
     }      }
     return $result;      return $result;
Line 1013  sub end_part { Line 1640  sub end_part {
     &Apache::lonxml::debug("in end_part $target ");      &Apache::lonxml::debug("in end_part $target ");
     my $status=$Apache::inputtags::status['-1'];      my $status=$Apache::inputtags::status['-1'];
     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);      my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
     my $result='';      my $in_order_show=&ordered_show_check();
     if ( $target eq 'meta' ) {      my $result;
  $result='';      if (!$Apache::lonxml::metamode) {
     } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {   $result = &Apache::lonxml::endredirection(); # started in &start_part
  $result=&Apache::inputtags::grade;   $Apache::lonxml::post_evaluate=0;
     } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {      }
       if ($target eq 'grade') {
    if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
       !$hidden && $in_order_show) {
       $result.=&Apache::inputtags::grade;
    } else {
       # move any submission data to .hidden
       &Apache::inputtags::hidealldata($Apache::inputtags::part);
    }
       } elsif (($target eq 'web' || $target eq 'tex') &&
        !$hidden && $in_order_show) {
  my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,   my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
  $target);   $target);
  if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {   if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
     $gradestatus='';      $gradestatus='';
  }   }
  $result=$gradestatus;   $result.=$gradestatus;
    if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result=&Apache::edit::end_table();   $result.=&Apache::edit::end_table();
       } elsif ($target eq 'modified') {
    $result .= $token->[2];
     }      }
     pop @Apache::inputtags::status;      pop @Apache::inputtags::status;
     $Apache::inputtags::part='';      $Apache::inputtags::part='';
       $Apache::lonhomework::type = $Apache::lonhomework::default_type;
     return $result;      return $result;
 }  }
   
 sub start_preduedate {  sub start_preduedate {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {      if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
  if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&   $target eq 'tex' || $target eq 'webgrade') {
     $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&   &Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
     $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {   if (!$Apache::lonhomework::scantronmode &&
     &Apache::lonxml::get_all_text("/preduedate",$parser);      $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
       $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
       &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
       &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
  }   }
     }      }
     return '';      return '';
Line 1049  sub end_preduedate { Line 1693  sub end_preduedate {
     return '';      return '';
 }  }
   
   # In all the modes where <postanswerdate> text is 
   # displayable,  all we do is eat up the text between the start/stop
   # tags if the conditions are not right to display it.
 sub start_postanswerdate {  sub start_postanswerdate {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {      my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
  if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {   &Apache::lonnet::allowed('pav',
     &Apache::lonxml::get_all_text("/postanswerdate",$parser);     $env{'request.course.id'}.'/'.$env{'request.course.sec'});
       if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
    $target eq 'tex' ) {
    if ($Apache::lonhomework::scantronmode ||
       $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
       (($target eq 'tex') && !$pav)) {
       &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
  }   }
     } elsif ($target eq 'tex') {  
  return '\vskip 0 mm \noindent';  
     }      }
     return '';      return '';
 }  }
Line 1066  sub end_postanswerdate { Line 1717  sub end_postanswerdate {
 }  }
   
 sub start_notsolved {  sub start_notsolved {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
  $target eq 'tex') {   $target eq 'tex' || $target eq 'webgrade') {
  my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};   my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
  &Apache::lonxml::debug("not solved has :$gradestatus:");   &Apache::lonxml::debug("not solved has :$gradestatus:");
  if ($gradestatus =~ /^correct/) {   if ($gradestatus =~ /^correct/ &&
       &Apache::response::show_answer()) {
     &Apache::lonxml::debug("skipping");      &Apache::lonxml::debug("skipping");
     &Apache::lonxml::get_all_text("/notsolved",$parser);      &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
  }   }
     }      }
     return '';      return '';
Line 1084  sub end_notsolved { Line 1736  sub end_notsolved {
 }  }
   
 sub start_solved {  sub start_solved {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
  $target eq 'tex') {   $target eq 'tex') {
  my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};   my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
  if ($gradestatus !~ /^correct/) {   if ($gradestatus !~ /^correct/ ||
     &Apache::lonxml::get_all_text("/solved",$parser);      !&Apache::response::show_answer()) {
       &Apache::lonxml::get_all_text("/solved",$parser,$style);
  }   }
     }      }
     return '';      return '';
Line 1099  sub end_solved { Line 1752  sub end_solved {
     return '';      return '';
 }  }
   
   sub start_problemtype {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
    my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
    if (!defined($mode)) { $mode='show'; }
    my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
    my $found=0;
    foreach my $type (split(',',$for)) {
       if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
    }
    if ($mode eq 'show' && !$found) {
       &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
    }
    if ($mode eq 'hide' && $found) {
       &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
    }
       } elsif ($target eq 'edit') {
    $result .=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::select_arg('Mode:','mode',
      [['show','Show'],
       ['hide','Hide']]
      ,$token);
    $result .=&Apache::edit::checked_arg('When used as type(s):','for',
        [ ['exam','Exam/Quiz Problem'],
          ['survey','Survey'],
          ['problem','Homework Problem'] ]
        ,$token);
    $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'mode','for');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       return $result;
   }
   
   sub end_problemtype {
       return '';
   }
   
 sub start_startouttext {  sub start_startouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my @result=(''.'');      my @result=(''.'');
     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }      if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
       
       my $nesting = 
    &Apache::lonxml::set_state('outtext',
      &Apache::lonxml::get_state('outtext')+1);
       if ($nesting > 1 && $env{'request.state'} eq 'construct') {
    &Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
       }
     return (@result);      return (@result);
 }  }
   
 sub end_startouttext {  sub end_startouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     my $text='';      my $text='';
   
     if ($target eq 'edit') {      if ($target eq 'edit') {
  $text=&Apache::lonxml::get_all_text("endouttext",$parser);   $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
  $result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>   $result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
 <td>".&mt('Delete:').  <td>".&mt('Delete:').
                  &Apache::edit::deletelist($target,$token)                   &Apache::edit::deletelist($target,$token)
  ."</td>   ."</td>
 <td>".  <td>".
                  &Apache::edit::insertlist($target,$token).                   &Apache::edit::insertlist($target,$token).
    '</td><td align="right" valign="top">' .
    &Apache::loncommon::helpLatexCheatsheet().
  &Apache::edit::end_row().   &Apache::edit::end_row().
                  &Apache::edit::start_spanning_row()."\n"                   &Apache::edit::start_spanning_row()."\n".
  . &Apache::loncommon::helpLatexCheatsheet () .   &Apache::edit::editfield($token->[1],$text,"",80,8,1);
  &Apache::edit::editfield($token->[1],$text,"",80,4);  
     }      }
     if ($target eq 'modified') {      if ($target eq 'modified') {
  $result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);   $result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
Line 1139  sub start_endouttext { Line 1842  sub start_endouttext {
     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }      if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
     if ($target eq "modified") {      if ($target eq "modified") {
  $result='<endouttext />'.   $result='<endouttext />'.
     &Apache::edit::handle_insertafter('startouttext'); }      &Apache::edit::handle_insertafter('startouttext');
       }
   
       my $nesting = 
    &Apache::lonxml::set_state('outtext',
      &Apache::lonxml::get_state('outtext')-1);
       if ($nesting < 0 && $env{'request.state'} eq 'construct') {
    &Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
    &Apache::lonxml::set_state('outtext', 0);
       }
     return $result;      return $result;
 }  }
   
Line 1151  sub end_endouttext { Line 1863  sub end_endouttext {
 }  }
   
 sub delete_startouttext {  sub delete_startouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);      #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
     my $text=$$parser['-1']->get_text("/endouttext");      my $text=$$parser['-1']->get_text("/endouttext");
     my $ntoken=$$parser['-1']->get_token();      my $ntoken=$$parser['-1']->get_token();
     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");      &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
Line 1167  sub delete_startouttext { Line 1879  sub delete_startouttext {
 sub start_simpleeditbutton {  sub start_simpleeditbutton {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result='';      my $result='';
     if (($target eq 'web') &&      if (($env{'form.simple_edit_button'} ne 'off') &&
         (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {   ($target eq 'web') &&
         my $url=$ENV{'request.noversionuri'};          (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
           my $url=$env{'request.noversionuri'};
         $url=~s/\?.*$//;          $url=~s/\?.*$//;
    my ($symb) = &Apache::lonnet::whichuser();
  $result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.   $result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
                 '<a href="'.$url.'/smpedit">'.&mt('Simple Problem Editor').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').                  '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'.&mt('Edit').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
 &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';  &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
     }      }
     return $result;      return $result;
Removed from v.1.222  
changed lines
  Added in v.1.408

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