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Diff for /loncom/homework/randomlabel.pm between versions 1.91 and 1.98

version 1.91, 2008/03/12 02:46:53 version 1.98, 2025/01/26 16:29:03
Line 24 Line 24
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  
 # SYNTAX:  =pod
 # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">  
 #    <labelgroup name="GroupOne" type="image">  =head1 NAME
 #      <location x="123" y="456" />  
 #      <location x="321" y="654" />  Apache::randomlable.pm
 #      <location x="213" y="546" />  
 #      <label description="TEXT-1">IMG-URL</label>  =head1 SYNOPSIS
 #      <label description="TEXT-2">IMG-URL</label>  
 #      <label description="TEXT-3">IMG-URL</label>  Interface for producing applet code which
 #    </labelgroup>  randomizes the labelling of an image.
 #    <labelgroup name="GroupTwo" type="text">  
 #      <location x="12" y="45" />  This is part of the LearningOnline Network with CAPA project
 #      <location x="32" y="65" />  described at http://www.lon-capa.org.
 #      <location x="21" y="54" />  
 #      <label>TEXT-1</label>  
 #      <label>TEXT-2</label>  =head1 SYNTAX
 #      <label>TEXT-3</label>  
 #    </labelgroup>   <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
 #   </randomlabel>      <labelgroup name="GroupOne" type="image">
 #  ===========================================        <location x="123" y="456" />
 #  side effect:        <location x="321" y="654" />
 #    location (123,456): $GroupOne[0] = 2  # images give out indexes        <location x="213" y="546" />
 #             (321,654): $GroupOne[1] = 1        <label description="TEXT-1">IMG-URL</label>
 #             (213,546): $GroupOne[2] = 0        <label description="TEXT-2">IMG-URL</label>
 #    location (12,45)  : $GroupTwo[0] = "TEXT-3"        <label description="TEXT-3">IMG-URL</label>
 #             (32,65)  : $GroupTwo[1] = "TEXT-1"      </labelgroup>
 #             (21,54)  : $GroupTwo[2] = "TEXT-2"      <labelgroup name="GroupTwo" type="text">
 #  ===========================================        <location x="12" y="45" />
         <location x="32" y="65" />
         <location x="21" y="54" />
         <label>TEXT-1</label>
         <label>TEXT-2</label>
         <label>TEXT-3</label>
       </labelgroup>
      </randomlabel>
     ===========================================
     side effect:
       location (123,456): $GroupOne[0] = 2   images give out indexes
                (321,654): $GroupOne[1] = 1
                (213,546): $GroupOne[2] = 0
       location (12,45)  : $GroupTwo[0] = "TEXT-3"
                (32,65)  : $GroupTwo[1] = "TEXT-1"
                (21,54)  : $GroupTwo[2] = "TEXT-2"
     ===========================================
   
   
   =head1 NOTABLE SUBROUTINES
   
   =over
   
   =item check_int()
   
    utility function to do error checking on a integer.
   
   =item extract_tag_sizes()
   
   Parameters:
         tag         - tag potentially containing height/width attributes.
         def_width   - Default width.
         def_height  - Default height.
     Returns:
         list containing width/height.
   
   =item get_label_width()
   
    Utility sub to compute the width of a label.
     
   =item end_labelgroup()
   
   begin to assign labels to locations
   
   =back
   
   =cut
   
   
   
 package Apache::randomlabel;  package Apache::randomlabel;
 use Apache::lonnet;  use Apache::lonnet;
 use strict;  use strict;
Line 61  use Apache::File(); Line 110  use Apache::File();
 use Apache::Constants qw(:common :http);  use Apache::Constants qw(:common :http);
 use Image::Magick;  use Image::Magick;
 use Apache::lonplot;  use Apache::lonplot;
   use Apache::lonlocal;
   use Apache::lonmeta;
 use LONCAPA;  use LONCAPA;
     
   
Line 89  sub check_int { Line 140  sub check_int {
     return $num;      return $num;
 }  }
   
 #  Get width/height from an image tag...  
 #  
 #  Parameters:  
 #      tag         - tag potentially containing height/width attributes.  
 #      def_width   - Default width.  
 #      def_height  - Default height.  
 #  Returns:  
 #      list containing width/height.  
 #  
 sub extract_tag_sizes {  sub extract_tag_sizes {
     my ($tag, $dw, $dh) = @_;      my ($tag, $dw, $dh) = @_;
     $tag =~ s/\s+/ /g;         # Collapse whitespace.      $tag =~ s/\s+/ /g;         # Collapse whitespace.
Line 120  sub extract_tag_sizes { Line 164  sub extract_tag_sizes {
   
 }  }
   
 my ($height_param,$width_param);  my ($height_param,$width_param,$alt_param);
 sub start_randomlabel {  sub start_randomlabel {
   
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
     push (@Apache::lonxml::namespace,'randomlabel');      push (@Apache::lonxml::namespace,'randomlabel');
     ($height_param,$width_param)=(0,0);      ($height_param,$width_param)=(0,0);
       $alt_param = '';
     $label_xscale = 1.0; # Assume image size not overridden.      $label_xscale = 1.0; # Assume image size not overridden.
     $label_yscale = 1.0;      $label_yscale = 1.0;
     my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);      my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
     if ( defined($bgimg) && $bgimg !~ /^http:/ ) {      if ( defined($bgimg) && $bgimg !~ /^https?\:/ ) {
  $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);   $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
  if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {   if (&Apache::lonnet::repcopy($bgimg) ne 'ok') {
     $bgimg='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';      $bgimg=$Apache::lonnet::perlvar{'lonDocRoot'}.'/adm/lonKaputt/lonlogo_broken.gif';
  }   }
     }      }
     $Apache::randomlabel::obj_cnt=0;      $Apache::randomlabel::obj_cnt=0;
Line 143  sub start_randomlabel { Line 188  sub start_randomlabel {
  $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);   $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
  $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);   $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
  $width_param  = &Apache::lonxml::get_param('width', $parstack, $safeeval);   $width_param  = &Apache::lonxml::get_param('width', $parstack, $safeeval);
           $alt_param    = &Apache::lonxml::get_param('alt',   $parstack, $safeeval);
           if ($alt_param eq '') {
               unless (($bgimg =~ m{^data\:image/gif;base64,}) || ($bgimg =~ /^https?\:/) ||
                       ($bgimg eq $Apache::lonnet::perlvar{'lonDocRoot'}.'/adm/lonKaputt/lonlogo_broken.gif')) {
                   $alt_param = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$bgimg);
               }
           }
     } elsif ($target eq 'tex' && defined($bgimg)) {      } elsif ($target eq 'tex' && defined($bgimg)) {
  $result.=&make_eps_image($bgimg,$parstack,$safeeval);   $result.=&make_eps_image($bgimg,$parstack,$safeeval);
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
Line 151  sub start_randomlabel { Line 203  sub start_randomlabel {
  $Apache::edit::bgimgsrc=   $Apache::edit::bgimgsrc=
     &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);      &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
  $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;   $Apache::edit::bgimgsrccurdepth=$Apache::lonxml::curdepth;
  $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';   $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' '.
  $result.=&Apache::edit::browse('bgimg',undef,undef,$only).' ';           &Apache::edit::browse_or_search('bgimg',undef,undef,$only,undef,1).
  $result.=&Apache::edit::search('bgimg').'<br />'.           '<br />'.
               &Apache::edit::text_arg('Description:'  ,'alt'     ,$token,40).'<br />'.
     &Apache::edit::text_arg('Width(pixel):' ,'width'   ,$token,6).      &Apache::edit::text_arg('Width(pixel):' ,'width'   ,$token,6).
     &Apache::edit::text_arg('Height(pixel):','height'  ,$token,6).      &Apache::edit::text_arg('Height(pixel):','height'  ,$token,6).
     &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).      &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
Line 161  sub start_randomlabel { Line 214  sub start_randomlabel {
     } 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,'bgimg','width',       $safeeval,'bgimg','width',
      'height','texwidth');       'height','texwidth','alt');
  if ($constructtag) {   if ($constructtag) {
     $result = &Apache::edit::rebuild_tag($token);      $result = &Apache::edit::rebuild_tag($token);
  }   }
Line 175  sub end_randomlabel { Line 228  sub end_randomlabel {
     my $count;      my $count;
     pop @Apache::lonxml::namespace;      pop @Apache::lonxml::namespace;
     if ($target eq 'web') {      if ($target eq 'web') {
           my $alttext;
           if ($alt_param eq '') {
               $alttext = &mt('labeled image');
           } else {
               $alttext = $alt_param;
           }
           $alttext = &HTML::Entities::encode($alttext,'<>&"');
  $count = $Apache::randomlabel::obj_cnt;   $count = $Apache::randomlabel::obj_cnt;
  if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }   if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
  $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";   $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" alt="'.$alttext.'" /><br />'."\n";
  &Apache::lonnet::appenv(\%args);   &Apache::lonnet::appenv(\%args);
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $result='\end{picture}\\\\';   $result='\end{picture}\\\\';
  $result.= ' \vskip -'.$height_param.' mm }  \\\\ ';   $result.= ' \vskip -'.$height_param.' mm } \\newline ';
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.=&Apache::edit::end_table;   $result.=&Apache::edit::end_table;
     }      }
Line 358  sub start_labelgroup { Line 418  sub start_labelgroup {
     return $result;      return $result;
 }  }
   
 #  
 #   Utility sub to compute the width of a label.  
 #  
 sub get_label_width {  sub get_label_width {
     my $label         = shift;      my $label         = shift;
     &Apache::lonxml::debug("image label = $label");      &Apache::lonxml::debug("image label = $label");
Line 410  sub add_vars { Line 469  sub add_vars {
     $out=Apache::run::run($code,$safeeval);      $out=Apache::run::run($code,$safeeval);
 }  }
   
 # begin to assign labels to locations  
   
 sub end_labelgroup {  sub end_labelgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $gname = $Apache::randomlabel::groupname;      my $gname = $Apache::randomlabel::groupname;
Removed from v.1.91  
changed lines
  Added in v.1.98

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