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Diff for /loncom/homework/randomlabel.pm between versions 1.58 and 1.98

version 1.58, 2004/02/11 21:59:49 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/
 #  
 # 7/20/2001 Isaac Tsai, initial syntax  =pod
 # 8/10/2001 Isaac Tsai,   
 # 8/30/2001 Isaac Tsai,   =head1 NAME
 # SYNTAX:  
 # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">  Apache::randomlable.pm
 #    <labelgroup name="GroupOne" type="image">  
 #      <location x="123" y="456" />  =head1 SYNOPSIS
 #      <location x="321" y="654" />  
 #      <location x="213" y="546" />  Interface for producing applet code which
 #      <label description="TEXT-1">IMG-URL</label>  randomizes the labelling of an image.
 #      <label description="TEXT-2">IMG-URL</label>  
 #      <label description="TEXT-3">IMG-URL</label>  This is part of the LearningOnline Network with CAPA project
 #    </labelgroup>  described at http://www.lon-capa.org.
 #    <labelgroup name="GroupTwo" type="text">  
 #      <location x="12" y="45" />  
 #      <location x="32" y="65" />  =head1 SYNTAX
 #      <location x="21" y="54" />  
 #      <label>TEXT-1</label>   <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
 #      <label>TEXT-2</label>      <labelgroup name="GroupOne" type="image">
 #      <label>TEXT-3</label>        <location x="123" y="456" />
 #    </labelgroup>        <location x="321" y="654" />
 #   </randomlabel>        <location x="213" y="546" />
 #  ===========================================        <label description="TEXT-1">IMG-URL</label>
 #  side effect:        <label description="TEXT-2">IMG-URL</label>
 #    location (123,456): $GroupOne[0] = 2  # images give out indexes        <label description="TEXT-3">IMG-URL</label>
 #             (321,654): $GroupOne[1] = 1      </labelgroup>
 #             (213,546): $GroupOne[2] = 0      <labelgroup name="GroupTwo" type="text">
 #    location (12,45)  : $GroupTwo[0] = "TEXT-3"        <location x="12" y="45" />
 #             (32,65)  : $GroupTwo[1] = "TEXT-1"        <location x="32" y="65" />
 #             (21,54)  : $GroupTwo[2] = "TEXT-2"        <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;
 use Apache::edit;  use Apache::edit;
 use Apache::File();  use Apache::File();
 use Apache::Constants qw(:common :http);  use Apache::Constants qw(:common :http);
   use Image::Magick;
   use Apache::lonplot;
   use Apache::lonlocal;
   use Apache::lonmeta;
   use LONCAPA;
    
   
 my %args;  my %args;
 my $cgi_id;  my $cgi_id;
   my $scale_factor; # image scale factor.
   my $label_xscale;                # Label scale factor (needed for gnuplot).
   my $label_yscale;
   my $dirty_width_adjust = 5;     # Width adjustment for e.g. gnuplot images.
   
 BEGIN {  BEGIN {
     &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));      &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label','bgimg'));
 }  }
   
   
   
 sub check_int {  sub check_int {
     # utility function to do error checking on a integer.      # utility function to do error checking on a integer.
     my ($num,$default) = @_;      my ($num,$default) = @_;
Line 82  sub check_int { Line 140  sub check_int {
     return $num;      return $num;
 }  }
   
   
   
   sub extract_tag_sizes {
       my ($tag, $dw, $dh) = @_;
       $tag =~ s/\s+/ /g;         # Collapse whitespace.
       $tag =~ s/\s*=\s*/=/g;     # kill space around ='s.
       $tag =~ s/[<>\"]//g;       # Get rid of the <">'s too.
   
       &Apache::lonxml::debug("Compressed tag: $tag");
       my @taglist = split(/ /,$tag);
       foreach my $attribute (@taglist) {
    if ($attribute =~ /^width/i) {
       my ($e, $s)= split(/=/,$attribute);
       $dw = $s;
    }
    if ($attribute =~  /^height/i) {
       my ($e, $s) = split(/=/,$attribute);
       $dh = $s;
    }
       } 
       return($dw, $dh);
   
   }
   
   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);
       $alt_param = '';
       $label_xscale = 1.0; # Assume image size not overridden.
       $label_yscale = 1.0;
     my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);      my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
     if ( $bgimg !~ /^http:/ ) {      if ( defined($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::tlabel_cnt=0;      $Apache::randomlabel::obj_cnt=0;
     $Apache::randomlabel::ilabel_cnt=0;  
     if ($target eq 'web') {      if ($target eq 'web') {
  $cgi_id=&Apache::loncommon::get_cgi_id();   $cgi_id=&Apache::loncommon::get_cgi_id();
  %args=();   %args=();
  $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);   $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
     } elsif ($target eq 'tex') {   $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
  my $w= &check_int(&Apache::lonxml::get_param('width',$parstack,$safeeval));   $width_param  = &Apache::lonxml::get_param('width', $parstack, $safeeval);
  my $h= &check_int(&Apache::lonxml::get_param('height',$parstack,$safeeval));          $alt_param    = &Apache::lonxml::get_param('alt',   $parstack, $safeeval);
  my $texwidth=&adjust_textwidth(&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,undef,1));          if ($alt_param eq '') {
  if (!$texwidth) { $texwidth=90; }              unless (($bgimg =~ m{^data\:image/gif;base64,}) || ($bgimg =~ /^https?\:/) ||
  $result.=&make_eps_image($bgimg,$texwidth,$h,$w);                      ($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)) {
    $result.=&make_eps_image($bgimg,$parstack,$safeeval);
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
           my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
  $result.=&Apache::edit::tag_start($target,$token);   $result.=&Apache::edit::tag_start($target,$token);
  $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).' '.
  $result.=&Apache::edit::browse('bgimg').' ';           &Apache::edit::browse_or_search('bgimg',undef,undef,$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 120  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);
     $result.=&Apache::edit::handle_insert();  
  }   }
     }      }
     return $result;      return $result;
Line 135  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') {
  $count = $Apache::randomlabel::tlabel_cnt;          my $alttext;
  if( $count != 0) { $args{"cgi.$cgi_id.COUNT"}=$count; }          if ($alt_param eq '') {
  $count = $Apache::randomlabel::ilabel_cnt;              $alttext = &mt('labeled image');
  if( $count != 0) { $args{"cgi.$cgi_id.ICOUNT"}=$count; }          } else {
  $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" /><br />'."\n";              $alttext = $alt_param;
  &Apache::lonnet::appenv(%args);          }
           $alttext = &HTML::Entities::encode($alttext,'<>&"');
    $count = $Apache::randomlabel::obj_cnt;
    if( $count != 0) { $args{"cgi.$cgi_id.OBJCOUNT"}=$count; }
    $result.='<img src="/adm/randomlabel.png?token='.$cgi_id.'" alt="'.$alttext.'" /><br />'."\n";
    &Apache::lonnet::appenv(\%args);
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $result='\end{picture}\\\\';   $result='\end{picture}\\\\';
  my $height=&Apache::lonxml::get_param('height',$parstack,$safeeval);   $result.= ' \vskip -'.$height_param.' mm } \\newline ';
  my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval);  
  my $texwidth=&adjust_textwidth(&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,undef,1));  
         if (!$texwidth) { $texwidth=90; }  
  my $howtoskipback = $texwidth*$height/$width;  
  $result.= ' \vskip -'.$howtoskipback.' mm }  \\\\ ';  
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.=&Apache::edit::end_table;   $result.=&Apache::edit::end_table;
     }      }
     return $result;      return $result;
 }  }
   
   
 sub start_bgimg {  sub start_bgimg {
     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 'tex' || $target eq 'analyze') {       if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
  &Apache::lonxml::startredirection;    &Apache::lonxml::startredirection(); 
     }      }
     return $result;      return $result;
 }  }
Line 168  sub end_bgimg { Line 262  sub end_bgimg {
     my ($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 'tex' || $target eq 'analyze') {       if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
  my $bgimg=&Apache::lonxml::endredirection;    my $bgimg=&Apache::lonxml::endredirection(); 
  if ($target eq 'web') {   if ($target eq 'web') {
       
       # If the  tag produced has sizes, they override ours.
       # (for now anyway).
       #
       &Apache::lonxml::debug("Base sizes: $width_param x $height_param");
   
       my ($plot_x, $plot_y) = &extract_tag_sizes($bgimg, 
          $width_param,
          $height_param);
       &Apache::lonxml::debug("Extracted sizes: $plot_x x $plot_y");
       if ($width_param) {
    $label_xscale     = $plot_x / $width_param;
       }
       if ($height_param) {
    $label_yscale     = $plot_y / $height_param;
       }
       &Apache::lonxml::debug("Scale factors:   $label_xscale $label_yscale");
   
       &Apache::lonxml::debug("Image: $bgimg");
     $bgimg=&Apache::imageresponse::clean_up_image($bgimg);      $bgimg=&Apache::imageresponse::clean_up_image($bgimg);
     $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);      &Apache::lonxml::debug("Cleaned image: $bgimg");
       $args{"cgi.$cgi_id.BGIMG"}=&escape($bgimg);
  } elsif ($target eq 'tex') {   } elsif ($target eq 'tex') {
     my $w=&check_int(&Apache::lonxml::get_param('width',$parstack,$safeeval,-2));      #   Some bg images can create latex for us... e.g. gnuplot.
     my $h=&check_int(&Apache::lonxml::get_param('height',$parstack,$safeeval,-2));      #   If it looks like we have some latex use that, 
     my $texwidth=&adjust_textwidth(&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,undef,-2));      #   otherwise, assume this is a resource name that must
     if (!$texwidth) { $texwidth=90; }      #   be converted into the latex to create an eps insertion.
     $result.=&make_eps_image($bgimg,$texwidth,$h,$w);      #
  }      my $src = $bgimg;
     }      $src =~ s/\s+$//s;
     return $result;      $src =~ s/^\s+//s;
 }  
       #If this is a dynamically generated image, it will
       #be in latex already, with a comment header that
       #describes the dimensions:
   
       if($src =~ /^%DYNAMICIMAGE:/) {
    $Apache::lonxml::debug = 0;
    &Apache::lonxml::debug("Dynamic image");
    my ($commentline, $junk) = split(/\n/, $src);
    &Apache::lonxml::debug("Comment line was: $commentline");
    my $trash;
    my $initial_width;
    ($trash, $initial_width, $height_param, $width_param) =
       split(/:/,$commentline);
    &Apache::lonxml::debug("internal web Width/height: $initial_width $height_param");
    &Apache::lonxml::debug("Texwitdh: $width_param");
    if($initial_width == 0) {
       $initial_width = $width_param;
    }
    # strip off the comments since output does not always
    # preserve \n's:
                   #
    $src =~ s/$commentline//;
    $scale_factor = $width_param / $initial_width;
    $height_param = $height_param*$scale_factor;
   
    $label_xscale = 1.0; #  $scale_factor;
    $label_yscale = 1.0; #  $scale_factor;
      
    &Apache::lonxml::debug("height $height_param");
    &Apache::lonxml::debug("Width $width_param");
    &Apache::lonxml::debug("Scale factors: $label_xscale $label_yscale");
    my $dirty_width = $width_param + $dirty_width_adjust;
    my $x_offset    = -$dirty_width_adjust/2.0;
    #
    #  Somewhere here it looks like height_param and
    #  width_param got backwards...
    #
    $result .= '\parbox{'.$dirty_width.'mm}{';
    $result  .= " $src \n";
    $result  .= '\setlength{\unitlength}{1mm}'."\n";
    $result  .= '\begin{picture}('."$width_param,$height_param)";
    $result  .= "($x_offset,-$height_param)";
    $result  .= "\n";
    $Apache::lonxml::debug = 0;
   
 sub make_eps_image {      } else {
     my ($bgimg,$texwidth,$h,$w)=@_;   $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
     my $newbgimg = $bgimg;  
     $bgimg=~s/\.(gif|jpg|png|jpeg)$/\.eps/i;  
     $bgimg= &Apache::lonnet::filelocation($bgimg);  
     $bgimg=~s|http:/[^/]*|/home/httpd/html|;  
     $bgimg=~s|/$||;  
     #if no eps file try to replicate it  
     if (not-e $bgimg) {  
  if (&Apache::lonnet::repcopy($bgimg) ne OK ) {  
     #if replication failed try to find ps file  
     $bgimg=~s/\.eps$/\.ps/;  
     #if no ps file try to replicate it  
     if (not -e $bgimg &&  
  &Apache::lonnet::repcopy($bgimg) ne OK) {  
  #if replication failed try to produce eps file dynamically  
  $bgimg=~s/\.ps$/\.eps/;  
  my $temp_file;  
  my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";  
  $temp_file = Apache::File->new('>>'.$filename);  
  $newbgimg =~ s|(.*)/res/|/home/httpd/html/res/|;  
  print $temp_file "$newbgimg\n";  
  $bgimg=~s|/home/httpd/html/res|/home/httpd/prtspool|;  
  $bgimg=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;  
     }      }
  }   }
     }      }
     $bgimg=~s|/$||;  
     my $dirtywidth=$texwidth+5;  
     my $result.='\vspace*{2mm}\noindent \parbox{'.$dirtywidth.  
  ' mm}{  \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.$bgimg.  
  '}\setlength{\unitlength}{1mm}  \begin{picture}('.  
  $texwidth.','.$texwidth*$h/$w.')(0,-'.$texwidth*$h/$w.')';  
     return $result;      return $result;
 }  }
   sub make_eps_image {
 sub adjust_textwidth {      my ($bgimg,$parstack,$safeeval,$depth)=@_;
     my $texwidth=shift;       &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
     my $pagewidth=$ENV{'form.textwidth'};      my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
     $pagewidth=~s/\s*mm\s*$//;      &Apache::lonxml::debug("image after:  $bgimg");
     if ($texwidth>$pagewidth) {$texwidth=$pagewidth;}      ($height_param,$width_param)=
     return $texwidth;   &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
          $depth,1);
   
       &Apache::lonxml::debug("Image size: $height_param x $width_param");
   
       my $dirtywidth=$width_param+5;
   
       my $result ="\n".'\vspace*{2mm}\noindent'."\n".
    '\parbox{'.$dirtywidth.
    ' mm}{  \noindent \epsfxsize='.$width_param.
    ' mm \epsffile{'.$path.$file.
    '}\setlength{\unitlength}{1mm}'."\n".'  \begin{picture}('.
    $width_param.','.$height_param.')(0,-'.$height_param.')'."\n";
       my $magick = Image::Magick->new;
       $magick->Read($bgimg);
       my $initial_width = $magick->Get('width');
       &Apache::lonxml::debug("ImageMagick thinks width is; $initial_width");
       $scale_factor = $width_param / $initial_width;
       return $result;
 }  }
   
 sub start_labelgroup {  sub start_labelgroup {
Line 244  sub start_labelgroup { Line 392  sub start_labelgroup {
  @Apache::randomlabel::ycoord = ();   @Apache::randomlabel::ycoord = ();
  @Apache::randomlabel::value = ();   @Apache::randomlabel::value = ();
  @Apache::randomlabel::label_arr  = ();   @Apache::randomlabel::label_arr  = ();
  @Apache::randomlabel::decription  = ();   @Apache::randomlabel::description  = ();
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.=&Apache::edit::tag_start($target,$token);   $result.=&Apache::edit::tag_start($target,$token);
  $result.=&Apache::edit::text_arg('Name:','name',$token).   $result.=&Apache::edit::text_arg('Name:','name',$token).
     &Apache::edit::select_arg('Type:','type',['text','image'],$token).      &Apache::edit::select_arg('Type:','type',['text','image'],$token);
     &Apache::edit::end_row().&Apache::edit::start_spanning_row();   if (!defined($token->[2]{'TeXsize'})) {
       $token->[2]{'TeXsize'}='\normalsize';
    }
    $result.=&Apache::edit::select_arg('TeX font size:','TeXsize',
      ['\tiny','\scriptsize',
       '\footnotesize','\small',
       '\normalsize','\large','\Large',
       '\LARGE','\huge','\Huge'],
      $token);
    $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($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,'name','type');       $safeeval,'name','type',
        'TeXsize');
  if ($constructtag) {   if ($constructtag) {
     $result = &Apache::edit::rebuild_tag($token);      $result = &Apache::edit::rebuild_tag($token);
     $result.=&Apache::edit::handle_insert();  
  }   }
     }      }
     return $result;      return $result;
 }  }
   
   
   
   sub get_label_width {
       my $label         = shift;
       &Apache::lonxml::debug("image label = $label");
       if (-e $label) {
    &Apache::lonxml::debug("$label exists");
       } else {
    &Apache::lonxml::debug("$label does not exist");
       }
       my $magick        = Image::Magick->new;
       $magick->Read($label);
       my $pixel_width   = $magick->Get('width');
       return $pixel_width * $scale_factor;
       
   
   }
   
   sub get_label_height {
       my $label         = shift;
       &Apache::lonxml::debug("image label = $label");
       if (-e $label) {
    &Apache::lonxml::debug("$label exists");
       } else {
    &Apache::lonxml::debug("$label does not exist");
       }
       my $magick        = Image::Magick->new;
       $magick->Read($label);
       my $pixel_height   = $magick->Get('height');
       return $pixel_height * $scale_factor;
   }
   
 sub add_vars {  sub add_vars {
     my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;      my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
       if (!defined($name) || $name eq '') { return; }
     my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";      my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
     my $out=Apache::run::run($code,$safeeval);      my $out=Apache::run::run($code,$safeeval);
     if ($value) {      if ($value) {
Line 279  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;
Line 291  sub end_labelgroup { Line 482  sub end_labelgroup {
  &Apache::structuretags::shuffle(\@idx_arr);   &Apache::structuretags::shuffle(\@idx_arr);
  for(0 .. $#Apache::randomlabel::label_arr) {   for(0 .. $#Apache::randomlabel::label_arr) {
     my $str;      my $str;
     my $xstr;  
     my $ystr;  
     my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";      my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
     my $x = $Apache::randomlabel::xcoord[$_];      my $x = $Apache::randomlabel::xcoord[$_];
     my $y = $Apache::randomlabel::ycoord[$_];      my $y = $Apache::randomlabel::ycoord[$_];
     my $value = $Apache::randomlabel::value[$_];      my $value = $Apache::randomlabel::value[$_];
       my $i=$Apache::randomlabel::obj_cnt++;
     if( $type eq 'text') {      if( $type eq 'text') {
  &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);   &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
  $str = 'LB'.$Apache::randomlabel::tlabel_cnt;   $str = join(':',$x,$y,&escape($label));
  $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;   $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:';
  $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;  
  $Apache::randomlabel::tlabel_cnt += 1;  
     } elsif ( $type eq 'image') {      } elsif ( $type eq 'image') {
  &add_vars($gname,$_,   &add_vars($gname,$_,
   $Apache::randomlabel::description[$idx_arr[$_]],    $Apache::randomlabel::description[$idx_arr[$_]],
   $idx_arr[$_],$value,$label,$safeeval);    $idx_arr[$_],$value,$label,$safeeval);
  $str = 'IMG'.$Apache::randomlabel::ilabel_cnt;   $str = join(':',$x,$y,&escape($label));
  $xstr = 'IX'.$Apache::randomlabel::ilabel_cnt;   $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:';
  $ystr = 'IY'.$Apache::randomlabel::ilabel_cnt;  
  $Apache::randomlabel::ilabel_cnt += 1;  
     } else {      } else {
  &Apache::lonxml::error('Unknown type of label :'.$type.':');   &Apache::lonxml::error('Unknown type of label :'.$type.':');
     }      }
     if ($target eq 'web') {      if ($target eq 'web') { $args{"cgi.$cgi_id.OBJ$i"} =$str; }
  $args{"cgi.$cgi_id.$str"} =&Apache::lonnet::escape($label);  
  $args{"cgi.$cgi_id.$xstr"}=$x;  
  $args{"cgi.$cgi_id.$ystr"}=$y;  
     }  
  }   }
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $WX1=0; #  Web x-coord. of upper left corner (ULC)   my $WX1=0; #  Web x-coord. of upper left corner (ULC)
  my $WY1=0; #  Web y-coord. of (ULC)   my $WY1=0; #  Web y-coord. of (ULC)
  my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);   my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
  my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);   my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
  my $texwidth=&adjust_textwidth(&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2,1));   my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
  if (!$texwidth) { $texwidth=90; }   if (!defined($TeXsize)) { $TeXsize='\\normalsize'; }
  my $TX1=0;  
  my $TY1=$texwidth*($wheight/$wwidth);  
  my $TX2=$texwidth;  
  my $TY2=0;  
   
   
  my $slopex=($wwidth-$WX1)/($TX2-$TX1);  
  my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));  
  my $cstx=$wwidth-$slopex*($TX2);  
  my $csty=$wheight-$slopey*($TY2);  
   
  my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);   my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
  &Apache::structuretags::shuffle(\@idx_arr);   &Apache::structuretags::shuffle(\@idx_arr);
   
  &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");   &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
    $Apache::lonxml::debug = 0;
  for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {   for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
     my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";      my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
     my $x = $Apache::randomlabel::xcoord[$i];      my $x = $Apache::randomlabel::xcoord[$i];
     my $y = $Apache::randomlabel::ycoord[$i];      my $y = $Apache::randomlabel::ycoord[$i];
       if ( $type eq 'text' ) {
    # FIXME the 3.5 here is the 'height' of the letter in TeX
    $y=$y-3.5;
       }
       &Apache::lonxml::debug("initially: x= $x y= $y");
     my $value = $Apache::randomlabel::value[$i];      my $value = $Apache::randomlabel::value[$i];
     #x latex coordinate      #x latex coordinate
     my $tcX=($x)*($texwidth/$wwidth);      my $tcX=($x)*($width_param/$wwidth);
       &Apache::lonxml::debug("wparam = $width_param wwidth = $wwidth, texx = $tcX");
     #y latex coordinate      #y latex coordinate
             #      my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );              #      my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
     my $tcY=$TY1-$y*($TY1/$wheight);      my $tcY=$height_param-$y*($height_param/$wheight);
       if ( $type eq 'image') {
    my $label_height = &get_label_height($label);
    $tcY=$tcY-$label_height;
       }
   
       &Apache::lonxml::debug("hparam = $height_param wheight = $wheight texy = $tcY");
     $tcX=sprintf('%.2f',$tcX);      $tcX=sprintf('%.2f',$tcX);
     $tcY=sprintf('%.2f',$tcY);      $tcY=sprintf('%.2f',$tcY);
     $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";      $result .= '\put('.$tcX.','.$tcY.'){';
     if( $type eq 'text') {      if( $type eq 'text') {
    $result.= $TeXsize.' \bf '.$label."}\n";
  &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);   &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
     } elsif ( $type eq 'image') {      } elsif ( $type eq 'image') {
    my ($path,$file) = &Apache::londefdef::get_eps_image($label);
    my $image_name = $path.$file;
    #
    #  Note that spaces in e.. \includegraphics cause problems for Latex
    # so they get replaced by _'s by lonprintout/printout and us:
    #
    my $label_width = &get_label_width($label);
   
    $result .=  '\includegraphics[width='.$label_width.'mm]{'
               .$image_name."}}\n";
  &add_vars($gname,$i,   &add_vars($gname,$i,
   $Apache::randomlabel::description[$idx_arr[$i]],    $Apache::randomlabel::description[$idx_arr[$i]],
   $idx_arr[$i],$value,$label,$safeeval);    $idx_arr[$i],$value,$label,$safeeval);
Line 365  sub end_labelgroup { Line 561  sub end_labelgroup {
  &Apache::lonxml::error('Unknown type of label :'.$type.':');   &Apache::lonxml::error('Unknown type of label :'.$type.':');
     }      }
  }   }
    $Apache::lonxml::debug =0;
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.=&Apache::edit::end_table;   $result.=&Apache::edit::end_table;
     }      }
Line 373  sub end_labelgroup { Line 570  sub end_labelgroup {
   
 # <location x="123" y="456" value="some value"/>  # <location x="123" y="456" value="some value"/>
 sub start_location {  sub start_location {
       $Apache::lonxml::debug = 0;
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);      my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
     my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);      my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
       &Apache::lonxml::debug("x = $x y = $y");
       $x = $x*$label_xscale;
       $y = $y*$label_yscale;
       &Apache::lonxml::debug(" H = $height_param W = $width_param");
       &Apache::lonxml::debug(" XS = $label_xscale YS = $label_yscale");
       &Apache::lonxml::debug(" X  = $x Y = $y");
     my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);      my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
     my $result='';      my $result='';
     push(@Apache::randomlabel::xcoord,$x);      push(@Apache::randomlabel::xcoord,$x);
Line 394  sub start_location { Line 598  sub start_location {
     $safeeval,'x','y','value');      $safeeval,'x','y','value');
  if ($constructtag) {   if ($constructtag) {
     $result = &Apache::edit::rebuild_tag($token);      $result = &Apache::edit::rebuild_tag($token);
     $result.=&Apache::edit::handle_insert();  
  }   }
     }      }
       $Apache::lonxml::debug = 0;
     return $result;      return $result;
 }  }
   
Line 408  sub end_location { Line 612  sub end_location {
 }  }
   
 # <label>$var_abc</label>  # <label>$var_abc</label>
   sub insert_label {
       my ($after) = @_;
       my $depth = scalar(@Apache::lonxml::depthcounter);
       $depth-- if ($after);
       my $inset = "\t"x$depth;
       return "\n$inset<label></label>";
   }
   
 sub start_label {  sub start_label {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';      my $result='';
Line 417  sub start_label { Line 629  sub start_label {
  &Apache::lonxml::startredirection;    &Apache::lonxml::startredirection; 
     } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
  $result.=&Apache::edit::tag_start($target,$token,"$type Label");   $result.=&Apache::edit::tag_start($target,$token,"$type Label");
  my $text=&Apache::lonxml::get_all_text("/label",$parser);   my $text=&Apache::lonxml::get_all_text("/label",$parser,$style);
  if ($type eq 'image') {   if ($type eq 'image') {
     $result.=&Apache::edit::end_row().      $result.=&Apache::edit::end_row().
  &Apache::edit::start_spanning_row();   &Apache::edit::start_spanning_row();
Line 455  sub end_label { Line 667  sub end_label {
  my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);   my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
  my $ltext=&Apache::lonxml::endredirection;    my $ltext=&Apache::lonxml::endredirection; 
  if ($type eq 'image') {   if ($type eq 'image') {
       if ($target eq 'tex') {
    # For tex targets, our image url has been potentially corrupted
    # by prepending \'s in front of special latex symbols.
    # For now we only worry about the _ case (most common?)
    # There's a whole host of theim in lonxml::latex_special_symbols
    # that could potentially have to be re-done.
   
    $ltext =~ s/\\_/_/g;
       }
     &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");      &Apache::lonxml::debug("Turning $ltext, $Apache::lonxml::pwd[-1]");
     $ltext=&Apache::imageresponse::clean_up_image($ltext);      $ltext=&Apache::imageresponse::clean_up_image($ltext);
 #    $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],  #    $ltext=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],
Line 463  sub end_label { Line 684  sub end_label {
     my $description = &Apache::lonxml::get_param('description',      my $description = &Apache::lonxml::get_param('description',
  $parstack,$safeeval);   $parstack,$safeeval);
     push(@Apache::randomlabel::description,$description);      push(@Apache::randomlabel::description,$description);
    } else {
       $ltext=~s/[\r\n]*//gs
  }   }
  push(@Apache::randomlabel::label_arr,$ltext);   push(@Apache::randomlabel::label_arr,$ltext);
     }      }
Removed from v.1.58  
changed lines
  Added in v.1.98

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