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Diff for /loncom/homework/imageresponse.pm between versions 1.3 and 1.72

version 1.3, 2001/02/22 01:13:43 version 1.72, 2005/06/22 12:03:23
Line 1 Line 1
 # The LearningOnline Network with CAPA  
 # iimage click response style  
   
 #FIXME assumes multiple possbile submissions but only one is possible currently  # The LearningOnline Network with CAPA
   # image click response style
   #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   #FIXME LATER assumes multiple possible submissions but only one is possible 
   #currently
   
 package Apache::imageresponse;  package Apache::imageresponse;
 use strict;  use strict;
   use Image::Magick();
   use Apache::randomlylabel();
   use Apache::londefdef();
   use Apache::Constants qw(:common :http);
   use Apache::lonlocal;
   use Apache::lonnet;
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));      &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
 }  }
   
 sub start_imageresponse {  sub start_imageresponse {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   #when in a radiobutton response use these      my $result;
   &Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle'));      #when in a radiobutton response use these
   my $id = &Apache::response::start_response($parstack,$safeeval);      &Apache::lonxml::register('Apache::imageresponse',
   return '';        ('foilgroup','foil','text','image','rectangle',
          'polygon','conceptgroup'));
       push (@Apache::lonxml::namespace,'imageresponse');
       my $id = &Apache::response::start_response($parstack,$safeeval);
       undef(%Apache::response::foilnames);
       if ($target eq 'meta') {
    $result=&Apache::response::meta_package_write('imageresponse');
       } elsif ($target eq 'analyze') {
    my $part_id="$Apache::inputtags::part.$id";
    push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
       }
       return $result;
 }  }
   
 sub end_imageresponse {  sub end_imageresponse {
   &Apache::response::end_response;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   return '';      &Apache::response::end_response;
       pop @Apache::lonxml::namespace;
       &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
       my $result;
       if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
       undef(%Apache::response::foilnames);
       return $result;
 }  }
   
 %Apache::response::foilgroup={};  %Apache::response::foilgroup=();
 sub start_foilgroup {  sub start_foilgroup {
   %Apache::response::foilgroup={};      %Apache::response::foilgroup=();
   return '';      $Apache::imageresponse::conceptgroup=0;
 }      &Apache::response::pushrandomnumber();
       return '';
 sub setrandomnumber {  
   my $rndseed=&Apache::lonnet::rndseed();  
   $rndseed=unpack("%32i",$rndseed);  
   $rndseed=$rndseed  
     +&Apache::lonnet::numval($Apache::inputtags::part)  
       +&Apache::lonnet::numval($Apache::inputtags::response['-1']);  
   srand($rndseed);  
   return '';  
 }  }
   
 sub getfoilcounts {  sub getfoilcounts {
   my ($parstack,$safeeval)=@_;      my ($parstack,$safeeval)=@_;
   my $rrargs ='';  
   if ( $#$parstack > 0 ) { $rrargs=$$parstack['-2']; }      my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
   my $max = &Apache::run::run("{$rrargs;".'return $max}',$safeeval);      # +1 since instructors will count from 1
   my $count = $#{ $Apache::response::foilgroup{'names'} };      my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
   return ($count,$max);      #if (&Apache::response::showallfoils()) { $max=$count; }
       return ($count,$max);
 }  }
   
 sub whichfoils {  sub whichfoils {
   my ($max)=@_;      my ($max)=@_;
   my @names = @{ $Apache::response::foilgroup{'names'} };      if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
   my @whichopt =();      my @names = @{ $Apache::response::foilgroup{'names'} };
   while ((($#whichopt+1) < $max) && ($#names > -1)) {      my @whichopt =();
     my $aopt=int rand $#names;      while ((($#whichopt+1) < $max) && ($#names > -1)) {
     &Apache::lonxml::debug("From $#names elms, picking $aopt");   &Apache::lonxml::debug("Have $#whichopt max is $max");
     $aopt=splice(@names,$aopt,1);   my $aopt;
     &Apache::lonxml::debug("Picked $aopt");  # if (&Apache::response::showallfoils()) {
     push (@whichopt,$aopt);  #    $aopt=0;
   }  # } else {
   return @whichopt;      $aopt=int(&Math::Random::random_uniform() * ($#names+1));
   # }
    &Apache::lonxml::debug("From $#names elms, picking $aopt");
    $aopt=splice(@names,$aopt,1);
    &Apache::lonxml::debug("Picked $aopt");
    push (@whichopt,$aopt);
       }
       return @whichopt;
   }
   
   sub prep_image {
       my ($image,$mode,$name)=@_;
       my $part=$Apache::inputtags::part;
       my $respid=$Apache::inputtags::response['-1'];
       my $id=&Apache::loncommon::get_cgi_id();
       my (%x,$i);
       $x{"cgi.$id.BGIMG"}=&Apache::lonnet::escape($image);
       my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
       #draws 2 xs on the image at the clicked location
       #one in white and then one in red on top of the one in white
       if (defined($x) && $x=~/\S/ && defined($y) && $y =~/\S/ && !&Apache::response::show_answer()) {
    my $length = 6;
    my $width = 1;
    my $extrawidth = 2;
    my $xmin=($x-$length);
    my $xmax=($x+$length); 
    my $ymin=($y-$length);
    my $ymax=($y+$length);
   
    $x{"cgi.$id.OBJTYPE"}.='LINE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
         "FFFFFF",($width+$extrawidth)));
    $x{"cgi.$id.OBJTYPE"}.='LINE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
         "FFFFFF",($width+$extrawidth)));
    $x{"cgi.$id.OBJTYPE"}.='LINE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
         "FF0000",($width)));
    $x{"cgi.$id.OBJTYPE"}.='LINE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
         "FF0000",($width)));
       }
       if ($mode eq 'answer') {
    my $width = 1;
    my $extrawidth = 2;
    my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
    foreach my $area (@areas) {
       if ($area=~/^rectangle:/) {
    $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    my ($x1,$y1,$x2,$y2)=
       ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
    $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
         ($width+$extrawidth)));
    $x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
       } elsif ($area=~/^polygon:(.*)/) {
    $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
    $x{"cgi.$id.OBJEXTRA$i"}=$1;
    $x{"cgi.$id.OBJTYPE"}.='POLYGON:';
    $i=$x{"cgi.$id.OBJCOUNT"}++;
    $x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
    $x{"cgi.$id.OBJEXTRA$i"}=$1;
       }
    }
       }
       &Apache::lonnet::appenv(%x);
       return $id;
 }  }
   
 sub displayfoils {  sub displayfoils {
   my (@whichopt) = @_;      my ($target,@whichopt) = @_;
   my $result ='';      my $result ='';
   my $name;      my $name;
   my $temp=1;      my $temp=1;
   foreach $name (@whichopt) {      foreach $name (@whichopt) {
     $result.=$Apache::response::foilgroup{"$name.text"}."<br />\n";   $result.=$Apache::response::foilgroup{"$name.text"};
     my $image=$Apache::response::foilgroup{"$name.image"};   &Apache::lonxml::debug("Text is $result");
     if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ ) {   if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
       $result.="<img src=\"$image\"/> <br />\n";   my $image=$Apache::response::foilgroup{"$name.image"};
    &Apache::lonxml::debug("image is $image");
    if ( $target eq 'web' && $image !~ /^http:/ ) {
       $image=&clean_up_image($image);
    } 
    &Apache::lonxml::debug("image is $image");
    if ( &Apache::response::show_answer() ) {
       if ($target eq 'tex') {
    $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
       } else {
    my $token=&prep_image($image,'answer',$name);
    $result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
       }
    } else {
       if ($target eq 'tex') {
    $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
       } else {
    my $id=$Apache::inputtags::response['-1'];
    my $token=&prep_image($image);
    my $temp=1;
    $result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".
       "src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
       }
    }
    $temp++;
       }
       return $result;
   }
   
   sub clean_up_image {
       my ($image)=@_;
       if ($image =~ /\s*<img\s*/) {
    ($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
    if ($image !~ /^http:/) {
       $image=&Apache::lonnet::hreflocation('',$image);
    }
    if (!$image) {
       $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
    }
     } else {      } else {
       $result.="<input type=\"image\" name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\" src=\"$image\"/> <br />\n";   $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
    &Apache::lonxml::debug("repcopying: $image");
    if (&Apache::lonnet::repcopy($image) ne 'ok') {
       $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
    }
     }      }
     $temp++;      return $image;
   }  
   return $result;  
 }  }
   
 sub gradefoils {  sub gradefoils {
   my (@whichopt) = @_;      my (@whichopt) = @_;
   my $result='';      my $x;
   my $x;      my $y;
   my $y;      my $result;
   my $result;      my $id=$Apache::inputtags::response['-1'];
   my $id=$Apache::inputtags::response['-1'];      my $temp=1;
   my $temp=1;      foreach my $name (@whichopt) {
   foreach my $name (@whichopt) {   $x=$env{"form.HWVAL_$id:$temp.x"};
     $x=$ENV{"form.HWVAL_$id:$temp.x"};   $y=$env{"form.HWVAL_$id:$temp.y"};
     $y=$ENV{"form.HWVAL_$id:$temp.y"};   &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
     &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");   if (defined($x) && defined($y) &&
     my @areas = @{ $Apache::response::foilgroup{"$name.area"} };      defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
     my $grade="INCORRECT";      my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
     foreach my $area (@areas) {      my $grade="INCORRECT";
       &Apache::lonxml::debug("Area is $area for $name");      foreach my $area (@areas) {
       $area =~ m/([a-z]*):/;   &Apache::lonxml::debug("Area is $area for $name");
       &Apache::lonxml::debug("Area of type $1");   $area =~ m/([a-z]*):/;
       if ($1 eq 'rectangle') {   &Apache::lonxml::debug("Area of type $1");
  $grade=&grade_rectangle($area,$x,$y);   if ($1 eq 'rectangle') {
       } else {      $grade=&grade_rectangle($area,$x,$y);
  &Apache::lonxml::error("Unknown area style $area");   } elsif ($1 eq 'polygon') {
       }      $grade=&grade_polygon($area,$x,$y);
       &Apache::lonxml::debug("Area said $grade");   } else {
       if ($grade eq 'APPROX_ANS') { last; }      &Apache::lonxml::error("Unknown area style $area");
     }   }
     &Apache::lonxml::debug("Foil was $grade");   &Apache::lonxml::debug("Area said $grade");
     if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }   if ($grade eq 'APPROX_ANS') { last; }
     if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }      }
     &Apache::lonxml::debug("Question is $result");      &Apache::lonxml::debug("Foil was $grade");
     $temp++;      if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
   }      if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";      &Apache::lonxml::debug("Question is $result");
   $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;      $temp++;
   return '';   }
       }
       my $responsestr="$x:$y";
       my $part=$Apache::inputtags::part;
       my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
       if ($result 
    && $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
       &Apache::response::handle_previous(\%previous,$result);
       $Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr;
       $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
       return '';
 }  }
   
 sub end_foilgroup {  sub end_foilgroup {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result='';      my $result='';
   my @whichopt;      my @whichopt;
   if ($target eq 'web' || $target eq 'grade') {      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
     &setrandomnumber();   $target eq 'analyze') {
     my ($count,$max) = &getfoilcounts($parstack,$safeeval);   my ($count,$max) = &getfoilcounts($parstack,$safeeval);
     if ($count>$max) { $count=$max }   if ($count>$max) { $count=$max }
     &Apache::lonxml::debug("Count is $count from $max");   &Apache::lonxml::debug("Count is $count from $max");
     @whichopt = &whichfoils($max);   @whichopt = &whichfoils($max);
   }   if ($target eq 'web' || $target eq 'tex') {
   if ($target eq 'web') {      $result=&displayfoils($target,@whichopt);
     $result=&displayfoils(@whichopt);   } elsif ($target eq 'grade') {
   }      if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
   if ($target eq 'grade') {   } elsif ( $target eq 'analyze') {
     if ( defined $ENV{'form.submitted'}) {      &Apache::response::analyze_store_foilgroup(\@whichopt,
       &gradefoils(@whichopt);        ['text','image','area']);
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
     }      }
   }      &Apache::response::poprandomnumber();
   return $result;      return $result;
 }  }
   
 sub start_conceptgroup {  sub start_conceptgroup {
       $Apache::imageresponse::conceptgroup=1;
       %Apache::response::conceptgroup=();
       return '';
 }  }
   
 sub end_conceptgroup {  sub end_conceptgroup {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       $Apache::imageresponse::conceptgroup=0;
       my $result;
       if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
    $target eq 'analyze') {
    &Apache::response::pick_foil_for_concept($target,
    ['area','text','image'],
    \%Apache::hint::image,
    $parstack,$safeeval);
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       }
       return $result;
   }
   
   sub insert_foil {
       return '
          <foil>
              <image></image>
              <text></text>
              <rectangle></rectangle>
          </foil>
   ';
 }  }
   
 $Apache::imageresponse::curname='';  $Apache::imageresponse::curname='';
 sub start_foil {  sub start_foil {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   if ($target eq 'web' || $target eq 'grade') {      my $result;
     my $args ='';      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
     if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }   $target eq 'analyze') {
     my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);   my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
     if ($name eq '') { $name=$Apache::lonxml::curdepth; }   if ($name eq "") {
     push(@{ $Apache::response::foilgroup{'names'} }, $name);      &Apache::lonxml::warning("Foils without names exist. This can cause problems to malfunction.");
     $Apache::imageresponse::curname=$name;      $name=$Apache::lonxml::curdepth;
   }   }
   return '';   if (defined($Apache::response::foilnames{$name})) {
       &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
    }
    $Apache::response::foilnames{$name}++;
    if ( $Apache::imageresponse::conceptgroup
        #&& !&Apache::response::showallfoils()
        ) {
       push(@{ $Apache::response::conceptgroup{'names'} }, $name);
    } else {
       push(@{ $Apache::response::foilgroup{'names'} }, $name);
    }
    $Apache::imageresponse::curname=$name;
       } elsif ($target eq 'edit') {
    $result  = &Apache::edit::tag_start($target,$token);
    $result .= &Apache::edit::text_arg('Name:','name',$token);
    $result .= &Apache::edit::end_row().
       &Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'name');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       } 
       return $result;;
 }  }
   
 sub end_foil {  sub end_foil {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   return '';      my $result;
       if ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       }
       return $result;
 }  }
   
 sub start_text {  sub start_text {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   if ($target eq 'web') { &Apache::lonxml::startredirection; }      my $result='';
   return '';      if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
    &Apache::lonxml::startredirection; 
       } elsif ($target eq 'edit') {
    my $descr=&Apache::lonxml::get_all_text('/text',$parser);
    $result=&Apache::edit::tag_start($target,$token,'Task Description').
       &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
       &Apache::edit::end_row();
       } elsif ($target eq "modified") {
    $result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
       }
       return $result;
 }  }
   
 sub end_text {  sub end_text {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   if ($target eq 'web') {      my $result;
     my $name = $Apache::imageresponse::curname;      if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
     $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;   my $name = $Apache::imageresponse::curname;
   }   if ( $Apache::imageresponse::conceptgroup
   return '';       #&& !&Apache::response::showallfoils()
        ) {
       $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
    } else {
       $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       }
       return $result;
 }  }
   
 sub start_image {  sub start_image {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   if ($target eq 'web') { &Apache::lonxml::startredirection; }      my $result='';
   return '';      if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
    &Apache::lonxml::startredirection; 
       } elsif ($target eq 'edit') {
    my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
    $Apache::edit::bgimgsrc=$bgimg;
    $Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
   
    $result=&Apache::edit::tag_start($target,$token,'Clickable Image').
       &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
    $result.=&Apache::edit::browse(undef,'textnode').' ';
    $result.=&Apache::edit::search(undef,'textnode').
       &Apache::edit::end_row();
       } elsif ($target eq "modified") {
    $result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
       }
       return $result;
 }  }
   
 sub end_image {  sub end_image {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   if ($target eq 'web') {      my $result;
     my $name = $Apache::imageresponse::curname;      my $name = $Apache::imageresponse::curname;
     my $image = &Apache::lonxml::endredirection;      if ($target eq 'web') {
     &Apache::lonxml::debug("out is $image");   my $image = &Apache::lonxml::endredirection();
     $Apache::response::foilgroup{"$name.image"} = $image;   &Apache::lonxml::debug("original image is $image");
   }   if ( $Apache::imageresponse::conceptgroup
   return '';       #&& !&Apache::response::showallfoils()
        ) {
       $Apache::response::conceptgroup{"$name.image"} = $image;
    } else {
       $Apache::response::foilgroup{"$name.image"} = $image;
    }
       } elsif ($target eq 'analyze') {
    my $image = &Apache::lonxml::endredirection();
    if ( $Apache::imageresponse::conceptgroup
        #&& !&Apache::response::showallfoils()
        ) {
       $Apache::response::conceptgroup{"$name.image"} = $image;
    } else {
       $Apache::response::foilgroup{"$name.image"} = $image;
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       } elsif ($target eq 'tex') {
    my $src = &Apache::lonxml::endredirection();
   
    #  There may be all sorts of whitespace on fore and aft:
   
    $src =~ s/\s+$//s;
    $src =~ s/^\s+//s;
   
    #
    #  Gnuplot e.g. just generates the latex to put inplace.
    #
    my $graphinclude;
    if ($src =~ /^%DYNAMICIMAGE/) {
       # This is needed because the newline is not always passed -> tex.
       # At present we don't care about the sizing info.
   
       my ($commentline, $restofstuff) = split(/\n/, $src);
       $graphinclude = $src;
       $graphinclude =~ s/^$commentline//;
    } else {
       my ($path,$file) = &Apache::londefdef::get_eps_image($src);
       my ($height_param,$width_param)=
    &Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
       $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
    }
    $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
       } 
       return $result;
 }  }
   
 sub start_rectangle {  sub start_rectangle {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   if ($target eq 'web' || $target eq 'grade') { &Apache::lonxml::startredirection; }      my $result='';
   return '';      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
    $target eq 'analyze') { 
    &Apache::lonxml::startredirection; 
       } elsif ($target eq 'edit') {
    my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
    $result=&Apache::edit::tag_start($target,$token,'Rectangle').
       &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
       &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
       &Apache::edit::end_row();
       } elsif ($target eq "modified") {
    &Apache::edit::deletecoorddata();
    $result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
       }
       return $result;
 }  }
   
 sub grade_rectangle {  sub grade_rectangle {
   my ($spec,$x,$y) = @_;      my ($spec,$x,$y) = @_;
   &Apache::lonxml::debug("Spec is $spec");      &Apache::lonxml::debug("Spec is $spec");
   $spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/;      my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
   my $x1=$1;      &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
   my $y1=$2;      if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
   my $x2=$3;      if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
   my $y2=$4;      if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
   &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");   return 'APPROX_ANS';
   if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }      }
   if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }      return 'INCORRECT';
   if ($x => $x1) { if ($x <= $x2) { if ($y => $y1) { if ($y <= $y2) { return 'APPROX_ANS'; } } } }  
   return 'INCORRECT';  
 }  }
   
 sub end_rectangle {  sub end_rectangle {
   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   if ($target eq 'web' || $target eq 'grade') {      my $result;
     my $name = $Apache::imageresponse::curname;      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
     my $area = &Apache::lonxml::endredirection;   $target eq 'analyze') {
     &Apache::lonxml::debug("out is $area for $name");   my $name = $Apache::imageresponse::curname;
     push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";   my $area = &Apache::lonxml::endredirection;
   }   $area=~s/\s//g;
   return '';   &Apache::lonxml::debug("out is $area for $name");
    if ( $Apache::imageresponse::conceptgroup
        #&& !&Apache::response::showallfoils()
        ) {
       push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
    } else {
       push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       }
       return $result;
   }
   
   sub start_polygon {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result='';
       if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
    $target eq 'analyze') { 
    &Apache::lonxml::startredirection; 
       } elsif ($target eq 'edit') {
    my $coords=&Apache::lonxml::get_all_text('/polygon',$parser);
    $result=&Apache::edit::tag_start($target,$token,'Polygon').
       &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
       &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
       &Apache::edit::end_row();
       } elsif ($target eq "modified") {
    $result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
       }
       return $result;
   }
   
   sub grade_polygon {
       my ($spec,$x,$y) = @_;
       &Apache::lonxml::debug("Spec is $spec");
       $spec=~s/^polygon://;
       my @polygon;
       foreach my $coord (split('-',$spec)) {
    my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
    &Apache::lonxml::debug("x $x y $y");
    push @polygon, {'x'=>$x,'y'=>$y};
       }
       #make end point start point
       push @polygon, $polygon[0];
       # cribbed from
       # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
       my $crossing = 0;    # the crossing number counter
   
       # loop through all edges of the polygon
       for (my $i=0; $i<$#polygon; $i++) {    # edge from V[i] to V[i+1]
    if ((($polygon[$i]->{'y'} <= $y)
        && ($polygon[$i+1]->{'y'} > $y))    # an upward crossing
       || 
       (($polygon[$i]->{'y'} > $y) 
        && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
       # compute the actual edge-ray intersect x-coordinate
               my $vt = ($y - $polygon[$i]->{'y'}) 
    / ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
               if ($x < $polygon[$i]->{'x'} + $vt * 
    ($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
                   $crossing++;   # a valid crossing of y=P.y right of P.x
       }
    }
       }
   
       # 0 if even (out), and 1 if odd (in)
       if ($crossing%2) {
    return 'APPROX_ANS';
       } else {
    return 'INCORRECT';
       }
   }
   
   sub end_polygon {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
    $target eq 'analyze') {
    my $name = $Apache::imageresponse::curname;
    my $area = &Apache::lonxml::endredirection;
    $area=~s/\s*//g;
    &Apache::lonxml::debug("out is $area for $name");
    if ( $Apache::imageresponse::conceptgroup
        #&& !&Apache::response::showallfoils()
        ) {
       push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
    } else {
       push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
    }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       }
       return $result;
 }  }
 1;  1;
 __END__  __END__
Removed from v.1.3  
changed lines
  Added in v.1.72

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