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Diff for /loncom/homework/structuretags.pm between versions 1.497 and 1.497.2.1

version 1.497, 2011/11/14 00:20:39 version 1.497.2.1, 2011/12/12 11:19:53
Line 1539  sub end_block { Line 1539  sub end_block {
     }      }
     return $result;      return $result;
 }  }
   #
   #  <languageblock [include='lang1,lang2...'] [exclude='lang1,lang2...']>
   #  ...
   #  </languageblock>
   #
   #   This declares the intent to provide content that can be rendered in the
   #   set of languages in the include specificatino but not in the exclude
   #   specification.  If a currently preferred language is in the include list
   #   the content in the <languageblock>...</languageblock> is rendered
   #   If the currently preferred language is in the exclude list,
   #   the content in the <languageblock>..></languageblock is not rendered.
   #
   #   Pathalogical case handling:
   #     - Include specified, without the preferred language but exclude  specified
   #       also without the preferred langauge results in rendering the block.
   #     - Exclude specified without include and excluden not containing a 
   #       preferred language renders the block.
   #     - Include and exclude both specifying the preferred language does not
   #       render the block.
   #     - If neither include/exclude is specified, the block gets rendered.
   #
   #  This tag has no effect when target is in {edit, modified}
   #
 sub start_languageblock {  sub start_languageblock {
     my ($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 'webgrade') {   $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 = $token->[2]->{'exclude'};
         my @preferred_languages=&Apache::lonlocal::preferred_languages();          my @preferred_languages=&Apache::lonlocal::preferred_languages();
 # This should not even happen, since we should at least have the server language  
         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }          # This should not even happen, since we should at least have the server language
 # Now loop over all languages in order of preference  
           if (!$preferred_languages[0]) { 
       $preferred_languages[0]='en'; 
    }
   
           # Now loop over all languages in order of preference
   
         foreach my $preferred_language (@preferred_languages) {          foreach my $preferred_language (@preferred_languages) {
 # If the languageblock has no arguments, show the contents  
            $result=1;      # If neither include/nor exlude is present the block is going
       # to get rendered.
   
              my $render=1;
            my $found=0;             my $found=0;
 # Do we have an include argument?             
      #  If include is specified,  don't render the block
      #  unless the preferred language is included in the set.
   
    if ($include) {     if ($include) {
 # If include is specified, by default, don't render the block                $render=0;
               $result=0;  
               foreach my $included_language (split(/\,/,$include)) {                foreach my $included_language (split(/\,/,$include)) {
 # ... but if my preferred language is included, render it  
                  if ($included_language eq $preferred_language) {                   if ($included_language eq $preferred_language) {
                     $result=1;                       $render=1; 
                     $found=1;                       $found=1; 
       last; # Only need to find the first.
                  }                   }
               }                }
    }     }
 # Do we have an exclude argument?             # Do we have an exclude argument?
      # If so, and one of the languages matches a preferred language
      # inhibit rendering the block.  Note that in the pathalogical case the
      # author has specified a preferred language in both the include and exclude
      # attribte exclude is preferred.  
   
            if ($exclude) {             if ($exclude) {
               $result=1;                $render=1;
               foreach my $excluded_language (split(/\,/,$exclude)) {                foreach my $excluded_language (split(/\,/,$exclude)) {
                  if ($excluded_language eq $preferred_language) {                   if ($excluded_language eq $preferred_language) {
                     $result=0;                      $render=0;
                     $found=1;                      $found=1;
       last; # Only need to find the first.
                  }                   }
               }                }
    }     }
            if ($found) { last; }             if ($found) { 
          last; # Done on any match of include or exclude.
      }
         }          }
  if ( ! $result ) {   # If $render not true skip the entire block until </languageblock>
    #
   
    if ( ! $render ) {
     my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,      my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
    $style);     $style);
     &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");      &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
  }   }
  $result='';   # If $render is true, we've not skipped the contents of the <languageglock>
    # and the normal loncapa processing flow will render it as a matter of course.
   
     } 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(&mt('Include Language:'),'include',   $result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
Removed from v.1.497  
changed lines
  Added in v.1.497.2.1

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