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Diff for /loncom/homework/randomlabel.pm between versions 1.68 and 1.78

version 1.68, 2005/04/12 09:35:22 version 1.78, 2005/06/28 14:58:23
Line 59  use strict; Line 59  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;
   
 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;
   
   
 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 79  sub check_int { Line 87  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 {
       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);  my ($height_param,$width_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);
       $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,$safeeval);
     if ( defined($bgimg) && $bgimg !~ /^http:/ ) {      if ( defined($bgimg) && $bgimg !~ /^http:/ ) {
  $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);   $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
Line 97  sub start_randomlabel { Line 139  sub start_randomlabel {
  $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"}=&Apache::lonnet::escape($bgimg);
    $height_param = &Apache::lonxml::get_param('height',$parstack, $safeeval);
    $width_param  = &Apache::lonxml::get_param('width', $parstack, $safeeval);
     } elsif ($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 142  sub end_randomlabel { Line 186  sub end_randomlabel {
     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 $result='';
Line 157  sub end_bgimg { Line 202  sub end_bgimg {
     if ($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);
       &Apache::lonxml::debug("Cleaned image: $bgimg");
     $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);      $args{"cgi.$cgi_id.BGIMG"}=&Apache::lonnet::escape($bgimg);
  } elsif ($target eq 'tex') {   } elsif ($target eq 'tex') {
     $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);      #   Some bg images can create latex for us... e.g. gnuplot.
       #   If it looks like we have some latex use that, 
       #   otherwise, assume this is a resource name that must
       #   be converted into the latex to create an eps insertion.
       #
       my $src = $bgimg;
       $src =~ s/\s+$//s;
       $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 + 5;
    $result .= '\parbox{'.$dirty_width.'mm}{';
    $result  .= " $src \n";
    $result  .= '\setlength{\unitlength}{1mm}'."\n";
    $result  .= '\begin{picture}('."$height_param,$width_param)";
    $result  .= "(0,-$height_param)";
    $result  .= "\n";
    $Apache::lonxml::debug = 0;
   
       } else {
    $result.=&make_eps_image($bgimg,$parstack,$safeeval,-2);
       }
  }   }
     }      }
     return $result;      return $result;
 }  }
   
 sub make_eps_image {  sub make_eps_image {
     my ($bgimg,$parstack,$safeeval,$depth)=@_;      my ($bgimg,$parstack,$safeeval,$depth)=@_;
       &Apache::lonxml::debug("image prior to get_eps_image: $bgimg");
     my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);      my ($path,$file) = &Apache::londefdef::get_eps_image($bgimg);
       &Apache::lonxml::debug("image after:  $bgimg");
     ($height_param,$width_param)=      ($height_param,$width_param)=
  &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,   &Apache::londefdef::image_size($bgimg,0.3,$parstack,$safeeval,
        $depth,1);         $depth,1);
   
       &Apache::lonxml::debug("Image size: $height_param x $width_param");
   
     my $dirtywidth=$width_param+5;      my $dirtywidth=$width_param+5;
     my $result ="\n".'\vspace*{2mm}\noindent'."\n".      my $result ="\n".'\vspace*{2mm}\noindent'."\n".
  '\parbox{'.$dirtywidth.   '\parbox{'.$dirtywidth.
Line 179  sub make_eps_image { Line 299  sub make_eps_image {
  ' mm \epsffile{'.$path.$file.   ' mm \epsffile{'.$path.$file.
  '}\setlength{\unitlength}{1mm}'."\n".'  \begin{picture}('.   '}\setlength{\unitlength}{1mm}'."\n".'  \begin{picture}('.
  $width_param.','.$height_param.')(0,-'.$height_param.')'."\n";   $width_param.','.$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;      return $result;
 }  }
   
Line 226  sub start_labelgroup { Line 351  sub start_labelgroup {
     return $result;      return $result;
 }  }
   
   #
   #   Utility sub to compute the width of a label.
   #
   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 add_vars {  sub add_vars {
     my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;      my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
     if (!defined($name) || $name eq '') { return; }      if (!defined($name) || $name eq '') { return; }
Line 289  sub end_labelgroup { Line 432  sub end_labelgroup {
  &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];
     # FIXME the 3.5 here is the 'height' of the letter in TeX      # FIXME the 3.5 here is the 'height' of the letter in TeX
     my $y = $Apache::randomlabel::ycoord[$i]-3.5;      my $y = $Apache::randomlabel::ycoord[$i]-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)*($width_param/$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 $tcY=$height_param-$y*($height_param/$wheight);      my $tcY=$height_param-$y*($height_param/$wheight);
       &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.','.$tcY.'){'.$TeXsize.' \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;
    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,$safeeval);
Line 313  sub end_labelgroup { Line 467  sub end_labelgroup {
  &Apache::lonxml::error('Unknown type of label :'.$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 321  sub end_labelgroup { Line 476  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 345  sub start_location { Line 507  sub start_location {
     $result.=&Apache::edit::handle_insert();      $result.=&Apache::edit::handle_insert();
  }   }
     }      }
       $Apache::lonxml::debug = 0;
     return $result;      return $result;
 }  }
   
Line 403  sub end_label { Line 566  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],
Removed from v.1.68  
changed lines
  Added in v.1.78

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