[BACK]Return to lonhelper.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / interface

Diff for /loncom/interface/lonhelper.pm between versions 1.14 and 1.27

version 1.14, 2003/04/30 18:40:49 version 1.27, 2003/05/12 19:33:57
Line 149  of the information used is persistent be Line 149  of the information used is persistent be
 and -maintain code.  and -maintain code.
   
 It is possible to do some of the work with an XML fragment parsed by  It is possible to do some of the work with an XML fragment parsed by
 lonxml; again, see lonprintout.pm for an example.  lonxml; again, see lonprintout.pm for an example. In that case it is 
   imperative that you call B<Apache::lonhelper::registerHelperTags()>
   before parsing XML fragments and B<Apache::lonhelper::unregisterHelperTags()>
   when you are done. See lonprintout.pm for examples of this usage in the
   printHelper subroutine.
   
 =cut  =cut
   
Line 189  my $substate; Line 193  my $substate;
 # end of the element tag is located.  # end of the element tag is located.
 my $paramHash;   my $paramHash; 
   
   # Note from Jeremy 5-8-2003: It is *vital* that the real handler be called
   # as a subroutine from the handler, or very mysterious things might happen.
   # I don't know exactly why, but it seems that the scope where the Apache
   # server enters the perl handler is treated differently from the rest of
   # the handler. This also seems to manifest itself in the debugger as entering
   # the perl handler in seemingly random places (sometimes it starts in the
   # compiling phase, sometimes in the handler execution phase where it runs
   # the code and stepping into the "1;" the module ends with goes into the handler,
   # sometimes starting directly with the handler); I think the cause is related.
   # In the debugger, this means that breakpoints are ignored until you step into
   # a function and get out of what must be a "faked up scope" in the Apache->
   # mod_perl connection. In this code, it was manifesting itself in the existence
   # of two seperate file-scoped $helper variables, one set to the value of the
   # helper in the helper constructor, and one referenced by the handler on the
   # "$helper->process()" line. The second was therefore never set, and was still
   # undefined when I tried to call process on it.
   # By pushing the "real handler" down into the "real scope", everybody except the 
   # actual handler function directly below this comment gets the same $helper and
   # everybody is happy.
   # The upshot of all of this is that for safety when a handler is  using 
   # file-scoped variables in LON-CAPA, the handler should be pushed down one 
   # call level, as I do here, to ensure that the top-level handler function does
   # not get a different file scope from the rest of the code.
   sub handler {
       my $r = shift;
       return real_handler($r);
   }
   
 # For debugging purposes, one can send a second parameter into this  # For debugging purposes, one can send a second parameter into this
 # function, the 'uri' of the helper you wish to have rendered, and  # function, the 'uri' of the helper you wish to have rendered, and
 # call this from other handlers.  # call this from other handlers.
 sub handler {  sub real_handler {
     my $r = shift;      my $r = shift;
     my $uri = shift;      my $uri = shift;
     if (!defined($uri)) { $uri = $r->uri(); }      if (!defined($uri)) { $uri = $r->uri(); }
Line 202  sub handler { Line 234  sub handler {
     my $file;      my $file;
     read $fh, $file, 100000000;      read $fh, $file, 100000000;
   
   
     # Send header, don't cache this page      # Send header, don't cache this page
     if ($r->header_only) {      if ($r->header_only) {
         if ($ENV{'browser.mathml'}) {          if ($ENV{'browser.mathml'}) {
Line 311  sub new { Line 344  sub new {
   
     $self->{TITLE} = shift;      $self->{TITLE} = shift;
           
       Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});
   
     # If there is a state from the previous form, use that. If there is no      # If there is a state from the previous form, use that. If there is no
     # state, use the start state parameter.      # state, use the start state parameter.
     if (defined $ENV{"form.CURRENT_STATE"})      if (defined $ENV{"form.CURRENT_STATE"})
Line 322  sub new { Line 357  sub new {
  $self->{STATE} = "START";   $self->{STATE} = "START";
     }      }
   
     Apache::loncommon::get_unprocessed_cgi($ENV{QUERY_STRING});  
   
     $self->{TOKEN} = $ENV{'form.TOKEN'};      $self->{TOKEN} = $ENV{'form.TOKEN'};
     # If a token was passed, we load that in. Otherwise, we need to create a       # If a token was passed, we load that in. Otherwise, we need to create a 
     # new storage file      # new storage file
Line 462  sub process { Line 495  sub process {
   
     # Phase 2: Preprocess current state      # Phase 2: Preprocess current state
     my $startState = $self->{STATE};      my $startState = $self->{STATE};
     my $state = $self->{STATES}{$startState};      my $state = $self->{STATES}->{$startState};
           
     # For debugging, print something here to determine if you're going      # For debugging, print something here to determine if you're going
     # to an undefined state.      # to an undefined state.
Line 473  sub process { Line 506  sub process {
   
     # Phase 3: While the current state is different from the previous state,      # Phase 3: While the current state is different from the previous state,
     # keep processing.      # keep processing.
     while ( $startState ne $self->{STATE} )      while ( $startState ne $self->{STATE} && 
               defined($self->{STATES}->{$self->{STATE}}) )
     {      {
  $startState = $self->{STATE};   $startState = $self->{STATE};
  $state = $self->{STATES}{$startState};   $state = $self->{STATES}->{$startState};
  $state->preprocess();   $state->preprocess();
     }      }
   
Line 495  sub display { Line 529  sub display {
   
     my $result = "";      my $result = "";
   
       if (!defined($state)) {
           $result = "<font color='#ff0000'>Error: state '$state' not defined!</font>";
           return $result;
       }
   
     # Phase 4: Display.      # Phase 4: Display.
     my $stateTitle = $state->title();      my $stateTitle = $state->title();
     my $bodytag = &Apache::loncommon::bodytag("$self->{TITLE}",'','');      my $bodytag = &Apache::loncommon::bodytag("$self->{TITLE}",'','');
Line 680  the helper variables, like this: Line 719  the helper variables, like this:
   
 =back  =back
   
   B<finalcode tag>
   
   Each element can contain a "finalcode" tag that, when the special FINAL
   helper state is used, will be executed, surrounded by "sub { my $helper = shift;"
   and "}". It is expected to return a string describing what it did, which 
   may be an empty string. See course initialization helper for an example. This is
   generally intended for helpers like the course initialization helper, which consist
   of several panels, each of which is performing some sort of bite-sized functionality.
   
   B<defaultvalue tag>
   
   Each element that accepts user input can contain a "defaultvalue" tag that,
   when surrounded by "sub { my $helper = shift; my $state = shift; " and "}",
   will form a subroutine that when called will provide a default value for
   the element. How this value is interpreted by the element is specific to
   the element itself, and possibly the settings the element has (such as 
   multichoice vs. single choice for <choices> tags). 
   
   This is also intended for things like the course initialization wizard, where the
   user is setting various parameters. By correctly grabbing current settings 
   and including them into the helper, it allows the user to come back to the
   helper later and re-execute it, without needing to worry about overwriting
   some setting accidentally.
   
   Again, see the course initialization helper for examples.
   
 =cut  =cut
   
 BEGIN {  BEGIN {
     &Apache::lonhelper::register('Apache::lonhelper::element',      &Apache::lonhelper::register('Apache::lonhelper::element',
                                  ('nextstate'));                                   ('nextstate', 'finalcode',
                                     'defaultvalue'));
 }  }
   
 # Because we use the param hash, this is often a sufficent  # Because we use the param hash, this is often a sufficent
Line 719  sub start_nextstate { Line 785  sub start_nextstate {
   
 sub end_nextstate { return ''; }  sub end_nextstate { return ''; }
   
   sub start_finalcode {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
       if ($target ne 'helper') {
           return '';
       }
       
       $paramHash->{FINAL_CODE} = &Apache::lonxml::get_all_text('/finalcode',
                                                                $parser);
       return '';
   }
   
   sub end_finalcode { return ''; }
   
   sub start_defaultvalue {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
       if ($target ne 'helper') {
           return '';
       }
       
       $paramHash->{DEFAULT_VALUE} = &Apache::lonxml::get_all_text('/defaultvalue',
                                                                $parser);
       $paramHash->{DEFAULT_VALUE} = 'sub { my $helper = shift; my $state = shift;' .
           $paramHash->{DEFAULT_VALUE} . '}';
       return '';
   }
   
   sub end_defaultvalue { return ''; }
   
 sub preprocess {  sub preprocess {
     return 1;      return 1;
 }  }
Line 865  the result is stored in. Line 961  the result is stored in.
 <choices> takes an attribute "multichoice" which, if set to a true  <choices> takes an attribute "multichoice" which, if set to a true
 value, will allow the user to select multiple choices.  value, will allow the user to select multiple choices.
   
   <choices> takes an attribute "allowempty" which, if set to a true 
   value, will allow the user to select none of the choices without raising
   an error message.
   
 B<SUB-TAGS>  B<SUB-TAGS>
   
 <choices> can have the following subtags:  <choices> can have the following subtags:
Line 914  You can mix and match methods of creatin Line 1014  You can mix and match methods of creatin
 "push" onto the choice list, rather then wiping it out. (You can even   "push" onto the choice list, rather then wiping it out. (You can even 
 remove choices programmatically, but that would probably be bad form.)  remove choices programmatically, but that would probably be bad form.)
   
   B<defaultvalue support>
   
   Choices supports default values both in multichoice and single choice mode.
   In single choice mode, have the defaultvalue tag's function return the 
   computer value of the box you want checked. If the function returns a value
   that does not correspond to any of the choices, the default behavior of selecting
   the first choice will be preserved.
   
   For multichoice, return a string with the computer values you want checked,
   delimited by triple pipes. Note this matches how the result of the <choices>
   tag is stored in the {VARS} hash.
   
 =cut  =cut
   
 no strict;  no strict;
Line 939  sub start_choices { Line 1051  sub start_choices {
     }      }
   
     # Need to initialize the choices list, so everything can assume it exists      # Need to initialize the choices list, so everything can assume it exists
     $paramHash->{'variable'} = $token->[2]{'variable'};      $paramHash->{'variable'} = $token->[2]{'variable'} if (!defined($paramHash->{'variable'}));
     $helper->declareVar($paramHash->{'variable'});      $helper->declareVar($paramHash->{'variable'});
     $paramHash->{'multichoice'} = $token->[2]{'multichoice'};      $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
       $paramHash->{'allowempty'} = $token->[2]{'allowempty'};
     $paramHash->{CHOICES} = [];      $paramHash->{CHOICES} = [];
     return '';      return '';
 }  }
Line 987  sub render { Line 1100  sub render {
     if ($self->{'multichoice'}) {      if ($self->{'multichoice'}) {
         $result .= <<SCRIPT;          $result .= <<SCRIPT;
 <script>  <script>
     function checkall(value) {      function checkall(value, checkName) {
  for (i=0; i<document.forms.wizform.elements.length; i++) {   for (i=0; i<document.forms.helpform.elements.length; i++) {
             document.forms.wizform.elements[i].checked=value;              ele = document.forms.helpform.elements[i];
               if (ele.name == checkName + '.forminput') {
                   document.forms.helpform.elements[i].checked=value;
               }
         }          }
     }      }
 </script>  </script>
 SCRIPT  SCRIPT
       }
   
       # Only print "select all" and "unselect all" if there are five or
       # more choices; fewer then that and it looks silly.
       if ($self->{'multichoice'} && scalar(@{$self->{CHOICES}}) > 4) {
         $buttons = <<BUTTONS;          $buttons = <<BUTTONS;
 <br />  <br />
 <input type="button" onclick="checkall(true)" value="Select All" />  <input type="button" onclick="checkall(true, '$var')" value="Select All" />
 <input type="button" onclick="checkall(false)" value="Unselect All" />  <input type="button" onclick="checkall(false, '$var')" value="Unselect All" />
 <br />&nbsp;  <br />&nbsp;
 BUTTONS  BUTTONS
     }      }
   
     if (defined $self->{ERRO_MSG}) {      if (defined $self->{ERROR_MSG}) {
         $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />';          $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br />';
     }      }
   
Line 1010  BUTTONS Line 1131  BUTTONS
           
     $result .= "<table>\n\n";      $result .= "<table>\n\n";
   
       my %checkedChoices;
       my $checkedChoicesFunc;
   
       if (defined($self->{DEFAULT_VALUE})) {
           $checkedChoicesFunc = eval ($self->{DEFAULT_VALUE});
           die 'Error in default value code for variable ' . 
               {'variable'} . ', Perl said:' . $@ if $@;
       } else {
           $checkedChoicesFunc = sub { return ''; };
       }
   
       # Process which choices should be checked.
       if ($self->{'multichoice'}) {
           for my $selectedChoice (split(/\|\|\|/, (&$checkedChoicesFunc($helper, $self)))) {
               $checkedChoices{$selectedChoice} = 1;
           }
       } else {
           # single choice
           my $selectedChoice = &$checkedChoicesFunc($helper, $self);
           
           my $foundChoice = 0;
           
           # check that the choice is in the list of choices.
           for my $choice (@{$self->{CHOICES}}) {
               if ($choice->[1] eq $selectedChoice) {
                   $checkedChoices{$choice->[1]} = 1;
                   $foundChoice = 1;
               }
           }
           
           # If we couldn't find the choice, pick the first one 
           if (!$foundChoice) {
               $checkedChoices{$self->{CHOICES}->[0]->[1]} = 1;
           }
       }
   
     my $type = "radio";      my $type = "radio";
     if ($self->{'multichoice'}) { $type = 'checkbox'; }      if ($self->{'multichoice'}) { $type = 'checkbox'; }
     my $checked = 0;  
     foreach my $choice (@{$self->{CHOICES}}) {      foreach my $choice (@{$self->{CHOICES}}) {
         $result .= "<tr>\n<td width='20'>&nbsp;</td>\n";          $result .= "<tr>\n<td width='20'>&nbsp;</td>\n";
         $result .= "<td valign='top'><input type='$type' name='$var.forminput'"          $result .= "<td valign='top'><input type='$type' name='$var.forminput'"
             . "' value='" .               . "' value='" . 
             HTML::Entities::encode($choice->[1])               HTML::Entities::encode($choice->[1]) 
             . "'";              . "'";
         if (!$self->{'multichoice'} && !$checked) {          if ($checkedChoices{$choice->[1]}) {
             $result .= " checked ";              $result .= " checked ";
             $checked = 1;  
         }          }
         my $choiceLabel = $choice->[0];          my $choiceLabel = $choice->[0];
         if ($choice->[4]) {  # if we need to evaluate this choice          if ($choice->[4]) {  # if we need to evaluate this choice
Line 1044  sub postprocess { Line 1199  sub postprocess {
     my $self = shift;      my $self = shift;
     my $chosenValue = $ENV{'form.' . $self->{'variable'} . '.forminput'};      my $chosenValue = $ENV{'form.' . $self->{'variable'} . '.forminput'};
   
     if (!$chosenValue) {      if (!defined($chosenValue) && !$self->{'allowempty'}) {
         $self->{ERROR_MSG} = "You must choose one or more choices to" .          $self->{ERROR_MSG} = "You must choose one or more choices to" .
             " continue.";              " continue.";
         return 0;          return 0;
Line 1295  the user can manipulate the folders. Line 1450  the user can manipulate the folders.
   
 <resource> takes the standard variable attribute to control what helper  <resource> takes the standard variable attribute to control what helper
 variable stores the results. It also takes a "multichoice" attribute,  variable stores the results. It also takes a "multichoice" attribute,
 which controls whether the user can select more then one resource.  which controls whether the user can select more then one resource. The 
   "toponly" attribute controls whether the resource display shows just the
   resources in that sequence, or recurses into all sub-sequences, defaulting
   to false.
   
 B<SUB-TAGS>  B<SUB-TAGS>
   
Line 1356  sub start_resource { Line 1514  sub start_resource {
     $paramHash->{'variable'} = $token->[2]{'variable'};      $paramHash->{'variable'} = $token->[2]{'variable'};
     $helper->declareVar($paramHash->{'variable'});      $helper->declareVar($paramHash->{'variable'});
     $paramHash->{'multichoice'} = $token->[2]{'multichoice'};      $paramHash->{'multichoice'} = $token->[2]{'multichoice'};
       $paramHash->{'toponly'} = $token->[2]{'toponly'};
     return '';      return '';
 }  }
   
Line 1455  sub render { Line 1614  sub render {
     my $var = $self->{'variable'};      my $var = $self->{'variable'};
     my $curVal = $helper->{VARS}->{$var};      my $curVal = $helper->{VARS}->{$var};
   
       my $buttons = '';
   
       if ($self->{'multichoice'}) {
           $result = <<SCRIPT;
   <script>
       function checkall(value, checkName) {
    for (i=0; i<document.forms.helpform.elements.length; i++) {
               ele = document.forms.helpform.elements[i];
               if (ele.name == checkName + '.forminput') {
                   document.forms.helpform.elements[i].checked=value;
               }
           }
       }
   </script>
   SCRIPT
           $buttons = <<BUTTONS;
   <br /> &nbsp;
   <input type="button" onclick="checkall(true, '$var')" value="Select All Resources" />
   <input type="button" onclick="checkall(false, '$var')" value="Unselect All Resources" />
   <br /> &nbsp;
   BUTTONS
       }
   
     if (defined $self->{ERROR_MSG}) {      if (defined $self->{ERROR_MSG}) {
         $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';          $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
     }      }
   
       $result .= $buttons;
   
     my $filterFunc = $self->{FILTER_FUNC};      my $filterFunc = $self->{FILTER_FUNC};
     my $choiceFunc = $self->{CHOICE_FUNC};      my $choiceFunc = $self->{CHOICE_FUNC};
     my $valueFunc = $self->{VALUE_FUNC};      my $valueFunc = $self->{VALUE_FUNC};
Line 1491  sub render { Line 1675  sub render {
         }          }
     };      };
   
     $ENV{'form.condition'} = 1;      $ENV{'form.condition'} = !$self->{'toponly'};
     $result .=       $result .= 
         &Apache::lonnavmaps::render( { 'cols' => [$renderColFunc,           &Apache::lonnavmaps::render( { 'cols' => [$renderColFunc, 
                                                   Apache::lonnavmaps::resource()],                                                    Apache::lonnavmaps::resource()],
Line 1500  sub render { Line 1684  sub render {
                                        'resource_no_folder_link' => 1,                                         'resource_no_folder_link' => 1,
                                        'iterator_map' => $mapUrl }                                         'iterator_map' => $mapUrl }
                                        );                                         );
   
       $result .= $buttons;
                                                                                                   
     return $result;      return $result;
 }  }
Line 1586  sub render { Line 1772  sub render {
     my $self = shift;      my $self = shift;
     my $result = '';      my $result = '';
     my $buttons = '';      my $buttons = '';
       my $var = $self->{'variable'};
   
     if ($self->{'multichoice'}) {      if ($self->{'multichoice'}) {
         $result = <<SCRIPT;          $result = <<SCRIPT;
 <script>  <script>
     function checkall(value) {      function checkall(value, checkName) {
  for (i=0; i<document.forms.wizform.elements.length; i++) {   for (i=0; i<document.forms.helpform.elements.length; i++) {
             document.forms.wizform.elements[i].checked=value;              ele = document.forms.helpform.elements[i];
               if (ele.name == checkName + '.forminput') {
                   document.forms.helpform.elements[i].checked=value;
               }
         }          }
     }      }
 </script>  </script>
 SCRIPT  SCRIPT
         $buttons = <<BUTTONS;          $buttons = <<BUTTONS;
 <br />  <br />
 <input type="button" onclick="checkall(true)" value="Select All" />  <input type="button" onclick="checkall(true, '$var')" value="Select All Students" />
 <input type="button" onclick="checkall(false)" value="Unselect All" />  <input type="button" onclick="checkall(false, '$var')" value="Unselect All Students" />
 <br />  <br />
 BUTTONS  BUTTONS
     }      }
Line 1641  BUTTONS Line 1831  BUTTONS
             $checked = 1;              $checked = 1;
         }          }
         $result .=          $result .=
             " value='" . HTML::Entities::encode($_)              " value='" . HTML::Entities::encode($_ . ':' . $choices->{$_}->[$section])
             . "' /></td><td>"              . "' /></td><td>"
             . HTML::Entities::encode($choices->{$_}->[$fullname])              . HTML::Entities::encode($choices->{$_}->[$fullname])
             . "</td><td align='center'>"               . "</td><td align='center'>" 
Line 1787  sub render { Line 1977  sub render {
   
     my $filterFunc = $self->{FILTER_FUNC};      my $filterFunc = $self->{FILTER_FUNC};
     my $buttons = '';      my $buttons = '';
       my $type = 'radio';
       if ($self->{'multichoice'}) {
           $type = 'checkbox';
       }
   
     if ($self->{'multichoice'}) {      if ($self->{'multichoice'}) {
         $result = <<SCRIPT;          $result = <<SCRIPT;
 <script>  <script>
     function checkall(value) {      function checkall(value, checkName) {
  for (i=0; i<document.forms.wizform.elements.length; i++) {   for (i=0; i<document.forms.helpform.elements.length; i++) {
             ele = document.forms.wizform.elements[i];              ele = document.forms.helpform.elements[i];
             if (ele.type == "checkbox") {              if (ele.name == checkName + '.forminput') {
                 document.forms.wizform.elements[i].checked=value;                  document.forms.helpform.elements[i].checked=value;
               }
           }
       }
   
       function checkallclass(value, className) {
           for (i=0; i<document.forms.helpform.elements.length; i++) {
               ele = document.forms.helpform.elements[i];
               if (ele.type == "$type" && ele.onclick) {
                   document.forms.helpform.elements[i].checked=value;
             }              }
         }          }
     }      }
 </script>  </script>
 SCRIPT  SCRIPT
         my $buttons = <<BUTTONS;          $buttons = <<BUTTONS;
 <br /> &nbsp;  <br /> &nbsp;
 <input type="button" onclick="checkall(true)" value="Select All" />  <input type="button" onclick="checkall(true, '$var')" value="Select All Files" />
 <input type="button" onclick="checkall(false)" value="Unselect All" />  <input type="button" onclick="checkall(false, '$var')" value="Unselect All Files" />
   BUTTONS
   
           if ($helper->{VARS}->{'construction'}) {
               $buttons .= <<BUTTONS;
   <input type="button" onclick="checkallclass(true, 'Published')" value="Select All Published" />
   <input type="button" onclick="checkallclass(false, 'Published')" value="Unselect All Published" />
 <br /> &nbsp;  <br /> &nbsp;
 BUTTONS  BUTTONS
          }
     }      }
   
     # Get the list of files in this directory.      # Get the list of files in this directory.
Line 1828  BUTTONS Line 2038  BUTTONS
         $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';          $result .= '<br /><font color="#FF0000">' . $self->{ERROR_MSG} . '</font><br /><br />';
     }      }
   
     $result .= '<table border="0" cellpadding="1" cellspacing="1">';      $result .= '<table border="0" cellpadding="2" cellspacing="0">';
   
     # Keeps track if there are no choices, prints appropriate error      # Keeps track if there are no choices, prints appropriate error
     # if there are none.       # if there are none. 
     my $choices = 0;      my $choices = 0;
     my $type = 'radio';  
     if ($self->{'multichoice'}) {  
         $type = 'checkbox';  
     }  
     # Print each legitimate file choice.      # Print each legitimate file choice.
     for my $file (@fileList) {      for my $file (@fileList) {
         $file = (split(/&/, $file))[0];          $file = (split(/&/, $file))[0];
Line 1845  BUTTONS Line 2051  BUTTONS
         }          }
         my $fileName = $subdir .'/'. $file;          my $fileName = $subdir .'/'. $file;
         if (&$filterFunc($file)) {          if (&$filterFunc($file)) {
             $result .= '<tr><td align="right">' .      my $status;
                 "<input type='$type' name='" . $var      my $color;
       if ($helper->{VARS}->{'construction'}) {
    ($status, $color) = @{fileState($subdir, $file)};
       } else {
    $status = '';
    $color = '';
       }
   
               # Netscape 4 is stupid and there's nowhere to put the
               # information on the input tag that the file is Published,
               # Unpublished, etc. In *real* browsers we can just say
               # "class='Published'" and check the className attribute of
               # the input tag, but Netscape 4 is too stupid to understand
               # that attribute, and un-comprehended attributes are not
               # reflected into the object model. So instead, what I do 
               # is either have or don't have an "onclick" handler that 
               # does nothing, give Published files the onclick handler, and
               # have the checker scripts check for that. Stupid and clumsy,
               # and only gives us binary "yes/no" information (at least I
               # couldn't figure out how to reach into the event handler's
               # actual code to retreive a value), but it works well enough
               # here.
           
               my $onclick = '';
               if ($status eq 'Published' && $helper->{VARS}->{'construction'}) {
                   $onclick = 'onclick="a=1" ';
               }
               $result .= '<tr><td align="right"' . " bgcolor='$color'>" .
                   "<input $onclick type='$type' name='" . $var
             . ".forminput' value='" . HTML::Entities::encode($fileName) .              . ".forminput' value='" . HTML::Entities::encode($fileName) .
                 "'";                  "'";
             if (!$self->{'multichoice'} && $choices == 0) {              if (!$self->{'multichoice'} && $choices == 0) {
                 $result .= ' checked';                  $result .= ' checked';
             }              }
             $result .= "/></td><td>" . $file . "</td></tr>\n";              $result .= "/></td><td bgcolor='$color'>" . $file .
                    "</td><td bgcolor='$color'>$status</td></tr>\n";
             $choices++;              $choices++;
         }          }
     }      }
Line 1868  BUTTONS Line 2103  BUTTONS
     return $result;      return $result;
 }  }
   
   # Determine the state of the file: Published, unpublished, modified.
   # Return the color it should be in and a label as a two-element array
   # reference.
   # Logic lifted from lonpubdir.pm, even though I don't know that it's still
   # the most right thing to do.
   
   sub fileState {
       my $constructionSpaceDir = shift;
       my $file = shift;
       
       my $docroot = $Apache::lonnet::perlvar{'lonDocRoot'};
       my $subdirpart = $constructionSpaceDir;
       $subdirpart =~ s/^\/home\/$ENV{'user.name'}\/public_html//;
       my $resdir = $docroot . '/res/' . $ENV{'user.domain'} . '/' . $ENV{'user.name'} .
           $subdirpart;
   
       my @constructionSpaceFileStat = stat($constructionSpaceDir . '/' . $file);
       my @resourceSpaceFileStat = stat($resdir . '/' . $file);
       if (!@resourceSpaceFileStat) {
           return ['Unpublished', '#FFCCCC'];
       }
   
       my $constructionSpaceFileModified = $constructionSpaceFileStat[9];
       my $resourceSpaceFileModified = $resourceSpaceFileStat[9];
       
       if ($constructionSpaceFileModified > $resourceSpaceFileModified) {
           return ['Modified', '#FFFFCC'];
       }
       return ['Published', '#CCFFCC'];
   }
   
 sub postprocess {  sub postprocess {
     my $self = shift;      my $self = shift;
     my $result = $ENV{'form.' . $self->{'variable'} . '.forminput'};      my $result = $ENV{'form.' . $self->{'variable'} . '.forminput'};
Line 2097  sub end_eval { Line 2363  sub end_eval {
   
 1;  1;
   
   package Apache::lonhelper::final;
   
   =pod
   
   =head2 Element: final
   
   <final> is a special element that works with helpers that use the <finalcode>
   tag. It goes through all the states and elements, executing the <finalcode>
   snippets and collecting the results. Finally, it takes the user out of the
   helper, going to a provided page.
   
   =cut
   
   no strict;
   @ISA = ("Apache::lonhelper::element");
   use strict;
   
   BEGIN {
       &Apache::lonhelper::register('Apache::lonhelper::final',
                                    ('final', 'exitpage'));
   }
   
   sub new {
       my $ref = Apache::lonhelper::element->new();
       bless($ref);
   }
   
   sub start_final { return ''; }
   
   sub end_final {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
       if ($target ne 'helper') {
           return '';
       }
   
       Apache::lonhelper::final->new();
      
       return '';
   }
   
   sub start_exitpage {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
       if ($target ne 'helper') {
           return '';
       }
   
       $paramHash->{EXIT_PAGE} = &Apache::lonxml::get_all_text('/exitpage',
                                                               $parser);
   
       return '';
   }
   
   sub end_exitpage { return ''; }
   
   sub render {
       my $self = shift;
   
       my @results;
   
       # Collect all the results
       for my $stateName (keys %{$helper->{STATES}}) {
           my $state = $helper->{STATES}->{$stateName};
           
           for my $element (@{$state->{ELEMENTS}}) {
               if (defined($element->{FINAL_CODE})) {
                   # Compile the code.
                   my $code = 'sub { my $helper = shift; ' . $element->{FINAL_CODE} .
                       '}';
                   $code = eval($code);
                   die 'Error while executing final code for element with var ' .
                       $element->{'variable'} . ', Perl said: ' . $@ if $@;
   
                   my $result = &$code($helper);
                   if ($result) {
                       push @results, $result;
                   }
               }
           }
       }
   
       if (scalar(@results) == 0) {
           return '';
       }
   
       my $result = "<ul>\n";
       for my $re (@results) {
           $result .= '    <li>' . $re . "</li>\n";
       }
       return $result . '</ul>';
   }
   
   1;
   
 package Apache::lonhelper::parmwizfinal;  package Apache::lonhelper::parmwizfinal;
   
 # This is the final state for the parmwizard. It is not generally useful,  # This is the final state for the parmwizard. It is not generally useful,
Line 2144  sub render { Line 2505  sub render {
                         'due_date' => "0_duedate",                          'due_date' => "0_duedate",
                         'answer_date' => "0_answerdate");                          'answer_date' => "0_answerdate");
           
     my $result = "<form name='helpform' method='get' action='/adm/parmset'>\n";  
     $result .= '<p>Confirm that this information is correct, then click &quot;Finish Wizard&quot; to complete setting the parameter.<ul>';  
     my $affectedResourceId = "";      my $affectedResourceId = "";
     my $parm_name = $parmTypeHash{$vars->{ACTION_TYPE}};      my $parm_name = $parmTypeHash{$vars->{ACTION_TYPE}};
     my $level = "";      my $level = "";
           my $resourceString;
     # Print the type of manipulation:      my $symb;
     $result .= '<li>Setting the <b>' . $dateTypeHash{$vars->{ACTION_TYPE}}      my $paramlevel;
                . "</b></li>\n";  
     if ($vars->{ACTION_TYPE} eq 'due_date' ||   
         $vars->{ACTION_TYPE} eq 'answer_date') {  
         # for due dates, we default to "date end" type entries  
         $result .= "<input type='hidden' name='recent_date_end' " .  
             "value='" . $vars->{PARM_DATE} . "' />\n";  
         $result .= "<input type='hidden' name='pres_value' " .   
             "value='" . $vars->{PARM_DATE} . "' />\n";  
         $result .= "<input type='hidden' name='pres_type' " .  
             "value='date_end' />\n";  
     } elsif ($vars->{ACTION_TYPE} eq 'open_date') {  
         $result .= "<input type='hidden' name='recent_date_start' ".  
             "value='" . $vars->{PARM_DATE} . "' />\n";  
         $result .= "<input type='hidden' name='pres_value' " .  
             "value='" . $vars->{PARM_DATE} . "' />\n";  
         $result .= "<input type='hidden' name='pres_type' " .  
             "value='date_start' />\n";  
     }   
       
     # Print the granularity, depending on the action      # Print the granularity, depending on the action
     if ($vars->{GRANULARITY} eq 'whole_course') {      if ($vars->{GRANULARITY} eq 'whole_course') {
         $result .= '<li>for <b>all resources in the course</b></li>';          $resourceString .= '<li>for <b>all resources in the course</b></li>';
         $level = 9; # general course, see lonparmset.pm perldoc          $level = 9; # general course, see lonparmset.pm perldoc
         $affectedResourceId = "0.0";          $affectedResourceId = "0.0";
           $symb = 'a';
           $paramlevel = 'general';
     } elsif ($vars->{GRANULARITY} eq 'map') {      } elsif ($vars->{GRANULARITY} eq 'map') {
         my $navmap = Apache::lonnavmaps::navmap->new(          my $navmap = Apache::lonnavmaps::navmap->new(
                            $ENV{"request.course.fn"}.".db",                             $ENV{"request.course.fn"}.".db",
                            $ENV{"request.course.fn"}."_parms.db", 0, 0);                             $ENV{"request.course.fn"}."_parms.db", 0, 0);
         my $res = $navmap->getById($vars->{RESOURCE_ID});          my $res = $navmap->getById($vars->{RESOURCE_ID});
         my $title = $res->compTitle();          my $title = $res->compTitle();
           $symb = $res->symb();
         $navmap->untieHashes();          $navmap->untieHashes();
         $result .= "<li>for the map named <b>$title</b></li>";          $resourceString .= "<li>for the map named <b>$title</b></li>";
         $level = 8;          $level = 8;
         $affectedResourceId = $vars->{RESOURCE_ID};          $affectedResourceId = $vars->{RESOURCE_ID};
           $paramlevel = 'map';
     } else {      } else {
         my $navmap = Apache::lonnavmaps::navmap->new(          my $navmap = Apache::lonnavmaps::navmap->new(
                            $ENV{"request.course.fn"}.".db",                             $ENV{"request.course.fn"}.".db",
                            $ENV{"request.course.fn"}."_parms.db", 0, 0);                             $ENV{"request.course.fn"}."_parms.db", 0, 0);
         my $res = $navmap->getById($vars->{RESOURCE_ID});          my $res = $navmap->getById($vars->{RESOURCE_ID});
           $symb = $res->symb();
         my $title = $res->compTitle();          my $title = $res->compTitle();
         $navmap->untieHashes();          $navmap->untieHashes();
         $result .= "<li>for the resource named <b>$title</b></li>";          $resourceString .= "<li>for the resource named <b>$title</b></li>";
         $level = 7;          $level = 7;
         $affectedResourceId = $vars->{RESOURCE_ID};          $affectedResourceId = $vars->{RESOURCE_ID};
           $paramlevel = 'full';
     }      }
   
       my $result = "<form name='helpform' method='get' action='/adm/parmset#$affectedResourceId&$parm_name&$level'>\n";
       $result .= '<p>Confirm that this information is correct, then click &quot;Finish Wizard&quot; to complete setting the parameter.<ul>';
       
       # Print the type of manipulation:
       $result .= '<li>Setting the <b>' . $dateTypeHash{$vars->{ACTION_TYPE}}
                  . "</b></li>\n";
       if ($vars->{ACTION_TYPE} eq 'due_date' || 
           $vars->{ACTION_TYPE} eq 'answer_date') {
           # for due dates, we default to "date end" type entries
           $result .= "<input type='hidden' name='recent_date_end' " .
               "value='" . $vars->{PARM_DATE} . "' />\n";
           $result .= "<input type='hidden' name='pres_value' " . 
               "value='" . $vars->{PARM_DATE} . "' />\n";
           $result .= "<input type='hidden' name='pres_type' " .
               "value='date_end' />\n";
       } elsif ($vars->{ACTION_TYPE} eq 'open_date') {
           $result .= "<input type='hidden' name='recent_date_start' ".
               "value='" . $vars->{PARM_DATE} . "' />\n";
           $result .= "<input type='hidden' name='pres_value' " .
               "value='" . $vars->{PARM_DATE} . "' />\n";
           $result .= "<input type='hidden' name='pres_type' " .
               "value='date_start' />\n";
       } 
   
       $result .= $resourceString;
       
     # Print targets      # Print targets
     if ($vars->{TARGETS} eq 'course') {      if ($vars->{TARGETS} eq 'course') {
         $result .= '<li>for <b>all students in course</b></li>';          $result .= '<li>for <b>all students in course</b></li>';
Line 2210  sub render { Line 2583  sub render {
     } else {      } else {
         # FIXME: This is probably wasteful! Store the name!          # FIXME: This is probably wasteful! Store the name!
         my $classlist = Apache::loncoursedata::get_classlist();          my $classlist = Apache::loncoursedata::get_classlist();
         my $name = $classlist->{$vars->{USER_NAME}}->[6];          my $username = $vars->{USER_NAME};
           # Chop off everything after the last colon (section)
           $username = substr($username, 0, rindex($username, ':'));
           my $name = $classlist->{$username}->[6];
         $result .= "<li>for <b>$name</b></li>";          $result .= "<li>for <b>$name</b></li>";
         $level -= 6;          $level -= 6;
         my ($uname, $udom) = split /:/, $vars->{USER_NAME};          my ($uname, $udom) = split /:/, $vars->{USER_NAME};
Line 2228  sub render { Line 2604  sub render {
     # print pres_marker      # print pres_marker
     $result .= "\n<input type='hidden' name='pres_marker'" .      $result .= "\n<input type='hidden' name='pres_marker'" .
         " value='$affectedResourceId&$parm_name&$level' />\n";          " value='$affectedResourceId&$parm_name&$level' />\n";
       
       # Make the table appear
       $result .= "\n<input type='hidden' value='true' name='prevvisit' />";
       $result .= "\n<input type='hidden' value='all' name='pschp' />";
       $result .= "\n<input type='hidden' value='$symb' name='pssymb' />";
       $result .= "\n<input type='hidden' value='$paramlevel' name='parmlev' />";
   
     $result .= "<br /><br /><center><input type='submit' value='Finish Helper' /></center></form>\n";      $result .= "<br /><br /><center><input type='submit' value='Finish Helper' /></center></form>\n";
   
Removed from v.1.14  
changed lines
  Added in v.1.27

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