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Diff for /loncom/interface/lonindexer.pm between versions 1.112 and 1.125

version 1.112, 2004/06/17 01:44:34 version 1.125, 2004/10/20 10:51:50
Line 60  my %hash; # global user-specific gdbm fi Line 60  my %hash; # global user-specific gdbm fi
 my %dirs; # keys are directories, values are the open/close status  my %dirs; # keys are directories, values are the open/close status
 my %language; # has the reference information present in language.tab  my %language; # has the reference information present in language.tab
 my %dynhash; # hash of hashes for dynamic metadata  my %dynhash; # hash of hashes for dynamic metadata
   my %dynread; # hash of directories already read for dynamic metadata
   my %fieldnames; # Metadata fieldnames
 # ----- Values which are set by the handler subroutine and are accessible to  # ----- Values which are set by the handler subroutine and are accessible to
 # -----     other methods.  # -----     other methods.
 my $extrafield; # default extra table cell  my $extrafield; # default extra table cell
Line 72  my @Only = (); Line 73  my @Only = ();
 my @Omit = ();  my @Omit = ();
   
   
   
   #
   #    Escapes strings that may have embedded 's that will be put into
   #    javascript strings as 'strings'.
   #    The assumptions are:
   #       There has been no effort to escape ' with \'
   #       Any \'s in the string are intended to be there as part of the URL
   #        and must also be escaped.
   # Parameters:
   #     input     - The string to escape.
   # Returns:
   #     The escaped string (' replaced by \' and \ replaced by \\).
   #
   sub javascript_escape {
       my ($input) = @_;
   
       #  I imagine a regexp wizard could combine the two expressions below.
       #  If you do you might want to comment the result.
   
       $input =~ s/\\/\\\\/g; # Escape the /'s..(must be first)>
       $input =~ s/\'/\\\'/g; # Esacpe the 's....
   
       return $input;
   }
   
   
   
 # ----------------------------- Handling routine called via Apache and mod_perl  # ----------------------------- Handling routine called via Apache and mod_perl
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
Line 87  sub handler { Line 115  sub handler {
     # these global to this package?  It is just so wrong....)      # these global to this package?  It is just so wrong....)
     undef (@Only);      undef (@Only);
     undef (@Omit);      undef (@Omit);
       %fieldnames=&Apache::lonmeta::fieldnames();
   
 # ------------------------------------- read in machine configuration variables  # ------------------------------------- read in machine configuration variables
     my $iconpath= $r->dir_config('lonIconsURL') . "/";      my $iconpath= $r->dir_config('lonIconsURL') . "/";
Line 134  sub handler { Line 163  sub handler {
    if ($ENV{'form.launch'} eq '2') {     if ($ENV{'form.launch'} eq '2') {
        $r->content_type('text/html');         $r->content_type('text/html');
        my $extra='';         my $extra='';
        if (defined($ENV{'form.titleelement'})) {         if (defined($ENV{'form.titleelement'}) && 
      $ENV{'form.titleelement'} ne '') {
    my $verify_title = &Apache::lonnet::gettitle($ENV{'form.acts'});     my $verify_title = &Apache::lonnet::gettitle($ENV{'form.acts'});
    &Apache::lonnet::logthis("Hrrm $ENV{'form.acts'} -- $verify_title");  #   &Apache::lonnet::logthis("Hrrm $ENV{'form.acts'} -- $verify_title");
    $verify_title=~s/'/\\'/g;     $verify_title=~s/'/\\'/g;
    $extra='window.opener.document.forms["'.$ENV{'form.form'}.'"].elements["'.$ENV{'form.titleelement'}.'"].value=\''.$verify_title.'\';';     $extra='window.opener.document.forms["'.$ENV{'form.form'}.'"].elements["'.$ENV{'form.titleelement'}.'"].value=\''.$verify_title.'\';';
        }         }
Line 144  sub handler { Line 174  sub handler {
  <html>   <html>
  <script type="text/javascript">   <script type="text/javascript">
  function load() {   function load() {
  window.opener.document.forms["$ENV{'form.form'}"].elements["$ENV{'form.element'}"].value='$ENV{'form.acts'}';   window.opener.document.forms["$ENV{'form.form'}"]
       .elements["$ENV{'form.element'}"]
       .value='$ENV{'form.acts'}';
  $extra   $extra
  window.close();   window.close();
  }   }
Line 176  END Line 208  END
  ' border="0" /></td>';   ' border="0" /></td>';
     $colspan=" colspan='2' ";      $colspan=" colspan='2' ";
     my $cl=&mt('Close');      my $cl=&mt('Close');
             my $gi=&mt('Group Import');              my $gi=&mt('Import');
             $closebutton=<<END;              $closebutton=<<END;
 <input type="button" name="close" value='$cl' onClick="self.close()">  <input type="button" name="close" value='$cl' onClick="self.close()">
 END  END
Line 439  $r->print(&Apache::loncommon::bodytag('B Line 471  $r->print(&Apache::loncommon::bodytag('B
    'av' => 'All versions',     'av' => 'All versions',
    'ud' => 'Update Display'     'ud' => 'Update Display'
    );     );
         my $Displayfileattributes=&mt('Display file attributes');  
  $r->print(<<END);   $r->print(<<END);
 <form method="post" name="fileattr" action="$uri"  <form method="post" name="fileattr" action="$uri"
  enctype="application/x-www-form-urlencoded">   enctype="application/x-www-form-urlencoded">
 <b><font color="#666666">$Displayfileattributes</font></b><br />  <label><input type="checkbox" name="attr9" value="1" $attrchk[9] onClick="this.form.submit();" /> $lt{'av'}</label>
 <table border=0><tr>  <table border="0">
 <td><input type="checkbox" name="attr0" value="1" $attrchk[0] onClick="this.form.submit();" /> $lt{'ti'}</td>  <tr>
 <td><input type="checkbox" name="attr1" value="1" $attrchk[1] onClick="this.form.submit();" /> $lt{'si'}</td>  <td><label><input type="checkbox" name="attr0" value="1" $attrchk[0] onClick="this.form.submit();" /> $lt{'ti'}</label></td>
 <td><input type="checkbox" name="attr2" value="1" $attrchk[2] onClick="this.form.submit();" /> $lt{'la'}</td>  <td><label><input type="checkbox" name="attr4" value="1" $attrchk[4] onClick="this.form.submit();" /> $lt{'au'}</label></td>
 <td><input type="checkbox" name="attr3" value="1" $attrchk[3] onClick="this.form.submit();" /> $lt{'lm'}</td>  <td><label><input type="checkbox" name="attr5" value="1" $attrchk[5] onClick="this.form.submit();" /> $lt{'kw'}</label></td>
 <td><input type="checkbox" name="attr8" value="1" $attrchk[8] onClick="this.form.submit();" /> $lt{'st'}</td>  <td><label><input type="checkbox" name="attr6" value="1" $attrchk[6] onClick="this.form.submit();" /> $lt{'ln'}</label></td>
 <td><input type="checkbox" name="attr10" value="1" $attrchk[10] onClick="this.form.submit();" /> $lt{'sa'}</td>  </tr>
 </tr><tr>  <tr>
 <td><input type="checkbox" name="attr4" value="1" $attrchk[4] onClick="this.form.submit();" /> $lt{'au'}</td>  <td><label><input type="checkbox" name="attr1" value="1" $attrchk[1] onClick="this.form.submit();" /> $lt{'si'}</label></td>
 <td><input type="checkbox" name="attr5" value="1" $attrchk[5] onClick="this.form.submit();" /> $lt{'kw'}</td>  <td><label><input type="checkbox" name="attr2" value="1" $attrchk[2] onClick="this.form.submit();" /> $lt{'la'}</label></td>
 <td><input type="checkbox" name="attr6" value="1" $attrchk[6] onClick="this.form.submit();" /> $lt{'ln'}</td>  <td><label><input type="checkbox" name="attr3" value="1" $attrchk[3] onClick="this.form.submit();" /> $lt{'lm'}</label></td>
 <td><input type="checkbox" name="attr7" value="1" $attrchk[7] onClick="this.form.submit();" /> $lt{'sr'}</td>  <td><label><input type="checkbox" name="attr10" value="1" $attrchk[10] onClick="this.form.submit();" /> $lt{'sa'}</label></td>
 <td><input type="checkbox" name="attr9" value="1" $attrchk[9] onClick="this.form.submit();" /> $lt{'av'}</td>  </tr>
 <td><input type="checkbox" name="attr11" value="1" $attrchk[11] onClick="this.form.submit();" /> $lt{'li'}</td>  <tr>
 </tr></table>  <td><label><input type="checkbox" name="attr8" value="1" $attrchk[8] onClick="this.form.submit();" /> $lt{'st'}</label></td>
   <td><label><input type="checkbox" name="attr11" value="1" $attrchk[11] onClick="this.form.submit();" /> $lt{'li'}</label></td>
   <td><label><input type="checkbox" name="attr7" value="1" $attrchk[7] onClick="this.form.submit();" /> $lt{'sr'}</label></td>
   <td>&nbsp;</td>
   </tr>
   </table>
 <input type="hidden" name="attrs" value="1" />  <input type="hidden" name="attrs" value="1" />
 <input type="submit" name="updatedisplay" value="$lt{'ud'}" />  <input type="submit" name="updatedisplay" value="$lt{'ud'}" />
 <input type="hidden" name="acts" value="" />  <input type="hidden" name="acts" value="" />
Line 511  END Line 547  END
     if ($hash{'display_attrs_5'} == 1);      if ($hash{'display_attrs_5'} == 1);
  $r->print("<td><b>".&mt("Language")."</b></td>\n")   $r->print("<td><b>".&mt("Language")."</b></td>\n")
     if ($hash{'display_attrs_6'} == 1);      if ($hash{'display_attrs_6'} == 1);
  $r->print("<td><b>".&mt("Resource")."</b></td>\n")  
     if ($hash{'display_attrs_7'} == 1);  
  $r->print("<td><b>".&mt("Usage Statistics")." <br />(".   $r->print("<td><b>".&mt("Usage Statistics")." <br />(".
   &mt("Courses/Network Hits").")</b></td>\n")    &mt("Courses/Network Hits").")</b> ".&mt('updated periodically')."</td>\n")
     if ($hash{'display_attrs_8'} == 1);      if ($hash{'display_attrs_8'} == 1);
  $r->print("<td><b>".&mt("Source Available")."</b></td>\n")   $r->print("<td><b>".&mt("Source Available")."</b></td>\n")
     if ($hash{'display_attrs_10'} == 1);      if ($hash{'display_attrs_10'} == 1);
  $r->print("<td><b>".&mt("Linked/Related Resources")."</b></td>\n")   $r->print("<td><b>".&mt("Linked/Related Resources")."</b></td>\n")
     if ($hash{'display_attrs_11'} == 1);      if ($hash{'display_attrs_11'} == 1);
    $r->print("<td><b>".&mt("Resource")."</b></td>\n")
       if ($hash{'display_attrs_7'} == 1);
  $r->print('</tr>');   $r->print('</tr>');
   
 # ----------------- read in what directories have previously been set to "open"  # ----------------- read in what directories have previously been set to "open"
Line 655  sub get_list { Line 691  sub get_list {
     if ($ENV{'form.updatedisplay'}) {      if ($ENV{'form.updatedisplay'}) {
  foreach (keys %hash) {   foreach (keys %hash) {
     delete $hash{$_} if ($_ =~ /^dirlist_files_/);      delete $hash{$_} if ($_ =~ /^dirlist_files_/);
       delete $hash{$_} if ($_ =~ /^dirlist_timestamp_files_/);
  }   }
     }      }
   
     if ($hash{'dirlist_files_'.$luri}) {      if (defined($hash{'dirlist_files_'.$luri}) &&
    $hash{'dirlist_timestamp_files_'.$luri}+600 > (time)) {
  @list = split(/\n/,$hash{'dirlist_files_'.$luri});   @list = split(/\n/,$hash{'dirlist_files_'.$luri});
     } elsif ($uri=~/\.(page|sequence)\/$/) {      } elsif ($uri=~/\.(page|sequence)\/$/) {
 # is a page or a sequence  # is a page or a sequence
Line 674  sub get_list { Line 712  sub get_list {
 # is really a directory  # is really a directory
  @list = &Apache::lonnet::dirlist($uri);   @list = &Apache::lonnet::dirlist($uri);
  $hash{'dirlist_files_'.$luri} = join("\n",@list);   $hash{'dirlist_files_'.$luri} = join("\n",@list);
  &dynmetaread($uri);   $hash{'dirlist_timestamp_files_'.$luri} = time;
     }      }
     return @list=&match_ext($r,@list);      return @list=&match_ext($r,@list);
 }  }
Line 682  sub get_list { Line 720  sub get_list {
 sub dynmetaread {  sub dynmetaread {
     my $uri=shift;      my $uri=shift;
     if (($hash{'display_attrs_8'}==1) || ($hash{'display_attrs_11'}==1)) {      if (($hash{'display_attrs_8'}==1) || ($hash{'display_attrs_11'}==1)) {
   # We don't want the filename
    $uri=~s/\/[^\/]+$//;
   # Did we already see this?
    my $builddir=$uri;
    while ($builddir) {
       if ($dynread{$builddir}) {
    return 0;
       }
       $builddir=~s/\/[^\/]+$//;
    }
   # Actually get the data
  %dynhash=   %dynhash=
     (%dynhash,&Apache::lonmeta::get_dynamic_metadata_from_sql($uri));      (%dynhash,&Apache::lonmeta::get_dynamic_metadata_from_sql($uri));
  &Apache::lonnet::logthis('Found: '.$uri." : ".join(',',keys %dynhash));  # Remember that we got it
    $dynread{$uri}=1;
     }       } 
 }  }
   
Line 821  sub display_line { Line 871  sub display_line {
    $diropen.'.gif"');      $diropen.'.gif"'); 
  $r->print (' name="'.$msg.'" height="22" type="image" border="0">'.   $r->print (' name="'.$msg.'" height="22" type="image" border="0">'.
    "\n");     "\n");
  $r->print ('<a href="javascript:gothere(\''.$filecom[0].   my $quotable_filecom = &javascript_escape($filecom[0]);
    $r->print ('<a href="javascript:gothere(\''.$quotable_filecom.
    '\')"><img src="'.$iconpath.'server.gif"');     '\')"><img src="'.$iconpath.'server.gif"');
  $r->print (' border="0" /></a>'."\n");   $r->print (' border="0" /></a>'."\n");
  $r->print (&mt("Domain")." - $listname ");   $r->print (&mt("Domain")." - $listname ");
Line 848  sub display_line { Line 899  sub display_line {
    '.gif"');      '.gif"'); 
  $r->print (' name="'.$msg.'" height="22" type="image" border="0">'.   $r->print (' name="'.$msg.'" height="22" type="image" border="0">'.
    "\n");     "\n");
  $r->print ('<a href="javascript:gothere(\''.$curdir.'\')"><img src='.   my $quotable_curdir = &javascript_escape($curdir);
    $r->print ('<a href="javascript:gothere(\''.$quotable_curdir
      .'\')"><img src='.
    $iconpath.'quill.gif border="0" name="'.$msg.     $iconpath.'quill.gif border="0" name="'.$msg.
    '" height="22" /></a>');     '" height="22" /></a>');
  my $domain=(split(m|/|,$startdir))[2];   my $domain=(split(m|/|,$startdir))[2];
Line 874  sub display_line { Line 927  sub display_line {
         }          }
  # Set the icon for the file   # Set the icon for the file
  my $iconname = &Apache::loncommon::icon($listname);   my $iconname = &Apache::loncommon::icon($listname);
  $r->print("<tr valign='$valign' bgcolor=$fileclr><td nowrap>");   $r->print("<tr valign='$valign' bgcolor=$fileclr><td nowrap='1' align='top'>");
   
  my $metafile = $Apache::lonnet::perlvar{'lonDocRoot'}.$pathprefix.  
     $filecom[0].'.meta';  
  if (-e $metafile) {  
     $metafile=1;  
  } else {  
     $metafile=0;  
  }  
         if ($ENV{'form.catalogmode'} eq 'interactive') {          if ($ENV{'form.catalogmode'} eq 'interactive') {
       my $quotable_filelink = &javascript_escape($filelink);
             $r->print("<a href=\"javascript:select_data(\'",              $r->print("<a href=\"javascript:select_data(\'",
                       $filelink,"')\">");                        $quotable_filelink,"')\">");
     $r->print("<img src='",$iconpath,"select.gif' border='0' /></a>".      $r->print("<img src='",$iconpath,"select.gif' border='0' /></a>".
       "\n");        "\n");
     $r->print("</td><td nowrap>");      $r->print("</td><td nowrap>");
Line 944  sub display_line { Line 991  sub display_line {
  if ($filelink=~/\.(page|sequence)$/) {   if ($filelink=~/\.(page|sequence)$/) {
     $r->print('</form>');      $r->print('</form>');
  }   }
  $r->print (" <a href=\"javascript:openWindow('".$filelink.   my $quotable_filelink = &javascript_escape($filelink);
   
   
    $r->print (" <a href=\"javascript:openWindow('".$quotable_filelink.
    "', 'previewfile', '450', '500', 'no', 'yes','yes')\";".     "', 'previewfile', '450', '500', 'no', 'yes','yes')\";".
    " TARGET=_self>$listname</a> ");     " TARGET=_self>$listname</a> ");
   
  $r->print (" (<a href=\"javascript:openWindow('".$filelink.   $r->print (" (<a href=\"javascript:openWindow('".$quotable_filelink.
    ".meta', 'metadatafile', '500', '550', 'no', 'yes','no')\"; ".     ".meta', 'metadatafile', '500', '550', 'no', 'yes','no')\"; ".
    "TARGET=_self>metadata</a>) ");     "TARGET=_self>metadata</a>) ");
  $r->print("</td>\n");   $r->print("</td>\n");
Line 986  sub display_line { Line 1036  sub display_line {
     $r->print('<td> '.($lang eq '' ? '&nbsp;' : $lang).      $r->print('<td> '.($lang eq '' ? '&nbsp;' : $lang).
       " </td>\n");        " </td>\n");
  }   }
    if ($hash{'display_attrs_8'} == 1) {
   # statistics
       &dynmetaread($filelink);
       $r->print("<td>");
       &dynmetaprint($r,$filelink,'count');
       &dynmetaprint($r,$filelink,'course');
       &dynmetaprint($r,$filelink,'stdno');
       &dynmetaprint($r,$filelink,'avetries');
       &dynmetaprint($r,$filelink,'difficulty');
       &dynmetaprint($r,$filelink,'disc');
       &dynmetaprint($r,$filelink,'clear');
       &dynmetaprint($r,$filelink,'technical');
       &dynmetaprint($r,$filelink,'correct');
       &dynmetaprint($r,$filelink,'helpful');
       &dynmetaprint($r,$filelink,'depth');
       $r->print("&nbsp;</td>\n");
   
    }
    if ($hash{'display_attrs_10'} == 1) {
       my $source = &Apache::lonnet::metadata($filelink,'sourceavail');
       if($source eq 'open') {
    my $sourcelink = &Apache::lonsource::make_link($filelink,$listname);
    my $quotable_sourcelink = &javascript_escape($sourcelink);
    $r->print('<td>'."<a href=\"javascript:openWindow('"
     .$quotable_sourcelink.
     "', 'previewsource', '700', '700', 'no', 'yes','yes')\";".
     " TARGET=_self>Yes</a> "."</td>\n");
       } else { #A cuddled else. :P
    $r->print("<td>&nbsp;</td>\n");
       }
    }
    if ($hash{'display_attrs_11'} == 1) {
   # links
      &dynmetaread($filelink);
      $r->print('<td>');
      &dynmetaprint($r,$filelink,'goto_list');
      &dynmetaprint($r,$filelink,'comefrom_list');
      &dynmetaprint($r,$filelink,'sequsage_list');
      &dynmetaprint($r,$filelink,'dependencies');
      $r->print('</td>');
           }
         if ($hash{'display_attrs_7'} == 1) {          if ($hash{'display_attrs_7'} == 1) {
   # Show resource
             my $output='';              my $output='';
             my $embstyle=&Apache::loncommon::fileembstyle($curfext);              my $embstyle=&Apache::loncommon::fileembstyle($curfext);
     if ($embstyle eq 'ssi') {      if ($embstyle eq 'ssi') {
Line 1014  sub display_line { Line 1106  sub display_line {
    $r->print('<td> '.($output eq '' ? '&nbsp;':$output).     $r->print('<td> '.($output eq '' ? '&nbsp;':$output).
       " </td>\n");        " </td>\n");
         }          }
  if ($hash{'display_attrs_8'} == 1) {  
 # statistics  
     $r->print("<td>");  
     if ($dynhash{$filelink}->{'stdno'}) {  
  $r->print(&mt('Number of students: ').  
   $dynhash{$filelink}->{'stdno'}.'<br />');  
     }  
     $r->print("&nbsp;</td>\n");  
   
  }  
  if ($hash{'display_attrs_10'} == 1) {  
     my $source = &Apache::lonnet::metadata($filelink,'sourceavail');  
     if($source eq 'open') {  
  my $sourcelink = &Apache::lonsource::make_link($filelink);  
  $r->print('<td>'."<a href=\"javascript:openWindow('".$sourcelink.  
   "', 'previewsource', '700', '700', 'no', 'yes','yes')\";".  
   " TARGET=_self>Yes</a> "."</td>\n");  
     } else { #A cuddled else. :P  
  $r->print("<td>&nbsp;</td>\n");  
     }  
  }  
  if ($hash{'display_attrs_11'} == 1) {  
 # links  
     $r->print("<td>$filelink");  
     if ($dynhash{$filelink}->{'goto_list'}) {  
  $r->print(&mt('Number of students: ').  
   $dynhash{$filelink}->{'goto_list'}.'<br />');  
     }  
     if ($dynhash{$filelink}->{'comefrom_list'}) {  
  $r->print(&mt('Number of students: ').  
   $dynhash{$filelink}->{'comefrom_list'}.'<br />');  
     }  
     $r->print("&nbsp;</td>\n");  
  }  
  $r->print("</tr>\n");   $r->print("</tr>\n");
     }      }
   
Line 1079  sub display_line { Line 1137  sub display_line {
    'folder_pointer_'.$diropen.'.gif"');     'folder_pointer_'.$diropen.'.gif"');
  $r->print (' name="'.$msg.'" height="22" type="image" border="0">'.   $r->print (' name="'.$msg.'" height="22" type="image" border="0">'.
    "\n");     "\n");
  $r->print ('<a href="javascript:gothere(\''.$curdir.'\')"><img src="'.   my $quotable_curdir = &javascript_escape($curdir);
    $r->print ('<a href="javascript:gothere(\''
      .$quotable_curdir.'\')"><img src="'.
    $iconpath.'folder_'.$diropen.'.gif" border="0" /></a>'.     $iconpath.'folder_'.$diropen.'.gif" border="0" /></a>'.
    "\n");     "\n");
  $r->print ("$listname</td>\n");   $r->print ("$listname</td>\n");
Line 1118  sub display_line { Line 1178  sub display_line {
     $r->print('<td> '.($lang eq '' ? '&nbsp;' : $lang).      $r->print('<td> '.($lang eq '' ? '&nbsp;' : $lang).
       " </td>\n");        " </td>\n");
  }   }
         if ($hash{'display_attrs_7'} == 1) {  
    $r->print('<td>&nbsp;</td>');  
         }  
  if ($hash{'display_attrs_8'} == 1) {   if ($hash{'display_attrs_8'} == 1) {
    $r->print('<td>&nbsp;</td>');     $r->print('<td>&nbsp;</td>');
  }   }
  if ($hash{'display_attrs_10'} == 1) {    if ($hash{'display_attrs_10'} == 1) {
    $r->print('<td>&nbsp;</td>');     $r->print('<td>&nbsp;</td>');
  }   }
  if ($hash{'display_attrs_11'} == 1) {   if ($hash{'display_attrs_11'} == 1) {
    $r->print('<td>&nbsp;</td>');     $r->print('<td>&nbsp;</td>');
  }   }
    if ($hash{'display_attrs_7'} == 1) {
      $r->print('<td>&nbsp;</td>');
           }
  $r->print('</form></tr>');   $r->print('</form></tr>');
     }      }
   
 }  }
   
   sub dynmetaprint {
       my ($r,$filelink,$item)=@_;
       if ($dynhash{$filelink}->{$item}) {
    $r->print("\n<br />".$fieldnames{$item}.': '.
     &Apache::lonmeta::prettyprint($item,
    $dynhash{$filelink}->{$item},
     (($ENV{'form.catalogmode'} ne 'groupimport')?'preview':''),
     '',
     (($ENV{'form.catalogmode'} eq 'groupimport')?'document.forms.fileattr':''),1));
       }
   }
   
 # ------------------- prints the beginning of a form for directory or file link  # ------------------- prints the beginning of a form for directory or file link
 sub begin_form {  sub begin_form {
     my ($r,$uri) = @_;      my ($r,$uri) = @_;
Removed from v.1.112  
changed lines
  Added in v.1.125

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