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Diff for /loncom/homework/imageresponse.pm between versions 1.11 and 1.61

version 1.11, 2001/08/06 17:39:37 version 1.61, 2005/01/31 23:09:55
Line 1 Line 1
 # The LON-CAPA image response handler  
 #   
 # Image click response style  
 #  
 # YEAR=2001  
 # 2/7,2/9,2/22,3/1,5/4,5/15,5/31,6/2,6/26 Guy Albertelli  
 # 8/6 Scott Harrison  
   
 #FIXME assumes multiple possible 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;
   
 # ======================================================================= BEGIN  BEGIN {
 sub BEGIN {  
     &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));      &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
 }  }
   
 # ======================================================== Start image response  
 sub start_imageresponse {  sub start_imageresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
     #when in a radiobutton response use these      #when in a radiobutton response use these
     &Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil',      &Apache::lonxml::register('Apache::imageresponse',
        'text','image',        ('foilgroup','foil','text','image','rectangle',
        'rectangle',         'polygon','conceptgroup'));
        'conceptgroup'));  
     push (@Apache::lonxml::namespace,'imageresponse');      push (@Apache::lonxml::namespace,'imageresponse');
     my $id = &Apache::response::start_response($parstack,$safeeval);      my $id = &Apache::response::start_response($parstack,$safeeval);
     return '';      undef(%Apache::response::foilnames);
       if ($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;
 }  }
   
 # ========================================================== End image response  
 sub end_imageresponse {  sub end_imageresponse {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     &Apache::response::end_response;      &Apache::response::end_response;
     pop @Apache::lonxml::namespace;      pop @Apache::lonxml::namespace;
     return '';      &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=();
 # ============================================================ Start foil group  
 sub start_foilgroup {  sub start_foilgroup {
     %Apache::response::foilgroup = {};      %Apache::response::foilgroup=();
     $Apache::imageresponse::conceptgroup = 0;      $Apache::imageresponse::conceptgroup=0;
     &Apache::response::setrandomnumber();      &Apache::response::pushrandomnumber();
     return '';      return '';
 }  }
   
 # =================================== Get foil counts (returns 2 element array)  
 sub getfoilcounts {  sub getfoilcounts {
     my ($parstack,$safeeval) = @_;      my ($parstack,$safeeval)=@_;
   
     my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');      my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
     # +1 since instructors will count from 1      # +1 since instructors will count from 1
     my $count = $#{ $Apache::response::foilgroup{'names'} }+1;      my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
       #if (&Apache::response::showallfoils()) { $max=$count; }
     return ($count,$max);      return ($count,$max);
 }  }
   
 # ============================================== Which foils (returns an array)  
 sub whichfoils {  sub whichfoils {
     my ($max) = @_;      my ($max)=@_;
     if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }      if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
     my @names = @{ $Apache::response::foilgroup{'names'} };      my @names = @{ $Apache::response::foilgroup{'names'} };
     my @whichopt =();      my @whichopt =();
     while ((($#whichopt+1) < $max) && ($#names > -1)) {      while ((($#whichopt+1) < $max) && ($#names > -1)) {
  &Apache::lonxml::debug("Have $#whichopt max is $max");   &Apache::lonxml::debug("Have $#whichopt max is $max");
  my $aopt = int(rand($#names+1));   my $aopt;
   # if (&Apache::response::showallfoils()) {
   #    $aopt=0;
   # } else {
       $aopt=int(&Math::Random::random_uniform() * ($#names+1));
   # }
  &Apache::lonxml::debug("From $#names elms, picking $aopt");   &Apache::lonxml::debug("From $#names elms, picking $aopt");
  $aopt = splice(@names,$aopt,1);   $aopt=splice(@names,$aopt,1);
  &Apache::lonxml::debug("Picked $aopt");   &Apache::lonxml::debug("Picked $aopt");
  push (@whichopt,$aopt);   push (@whichopt,$aopt);
     }      }
     return @whichopt;      return @whichopt;
 }  }
   
 # ======================================= Display foils (returns scalar string)  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.'.   if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
   $Apache::inputtags::part.   my $image=$Apache::response::foilgroup{"$name.image"};
   '.solved'} =~ /^correct/) {   &Apache::lonxml::debug("image is $image");
     $result .= "<img src=\"$image\"/> <br />\n";   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 {   } else {
     $result .= "<input type=\"image\" name=\"HWVAL_".      if ($target eq 'tex') {
        $Apache::inputtags::response['-1'].   $result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
        ":$temp\" src=\"$image\"/> <br />\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++;   $temp++;
     }      }
     return $result;      return $result;
 }  }
   
 # ================================================================= Grade foils  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 {
    $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
    if (&Apache::lonnet::repcopy($image) ne OK) {
       $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
    }
       }
       return $image;
   }
   
 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(@{ $Apache::response::foilgroup{"$name.area"} })) {   if (defined($x) && defined($y) &&
       defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
     my @areas = @{ $Apache::response::foilgroup{"$name.area"} };      my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
     my $grade = "INCORRECT";      my $grade="INCORRECT";
     foreach my $area (@areas) {      foreach my $area (@areas) {
  &Apache::lonxml::debug("Area is $area for $name");   &Apache::lonxml::debug("Area is $area for $name");
  $area =~ m/([a-z]*):/;   $area =~ m/([a-z]*):/;
  &Apache::lonxml::debug("Area of type $1");   &Apache::lonxml::debug("Area of type $1");
  if ($1 eq 'rectangle') {   if ($1 eq 'rectangle') {
     $grade = &grade_rectangle($area,$x,$y);      $grade=&grade_rectangle($area,$x,$y);
    } elsif ($1 eq 'polygon') {
       $grade=&grade_polygon($area,$x,$y);
  } else {   } else {
     &Apache::lonxml::error("Unknown area style $area");      &Apache::lonxml::error("Unknown area style $area");
  }   }
Line 123  sub gradefoils { Line 264  sub gradefoils {
  if ($grade eq 'APPROX_ANS') { last; }   if ($grade eq 'APPROX_ANS') { last; }
     }      }
     &Apache::lonxml::debug("Foil was $grade");      &Apache::lonxml::debug("Foil was $grade");
     if ($grade eq 'INCORRECT') { $result = 'INCORRECT'; }      if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
     if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) {      if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
  $result = $grade; }  
     &Apache::lonxml::debug("Question is $result");      &Apache::lonxml::debug("Question is $result");
     $temp++;      $temp++;
  }   }
     }      }
     $Apache::lonhomework::results{'resource.'.      my $responsestr="$x:$y";
   $Apache::inputtags::part.      my $part=$Apache::inputtags::part;
   ".$id.submission"} = "$x:$y";      my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
     $Apache::lonhomework::results{'resource.'.      if ($result 
   $Apache::inputtags::part.   && $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
   ".$id.awarddetail"} = $result;      &Apache::response::handle_previous(\%previous,$result);
       $Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr;
       $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
     return '';      return '';
 }  }
   
 # ======================================= End foil group (return scalar string)  
 sub end_foilgroup {  sub end_foilgroup {
     my ($target,$token,$tagstack,$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' ||
    $target eq 'analyze') {
  my ($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;
 }  }
   
 # ========================================================= Start concept group  
 sub start_conceptgroup {  sub start_conceptgroup {
     $Apache::imageresponse::conceptgroup = 1;      $Apache::imageresponse::conceptgroup=1;
     %Apache::response::conceptgroup = {};      %Apache::response::conceptgroup=();
     return '';      return '';
 }  }
   
 # =========================================================== End concept group  
 sub end_conceptgroup {  sub end_conceptgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     $Apache::imageresponse::conceptgroup = 0;        $Apache::imageresponse::conceptgroup=0;
     if ($target eq 'web' || $target eq 'grade') {      my $result;
  if (defined(@{ $Apache::response::conceptgroup{'names'} })) {      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
     my @names = @{ $Apache::response::conceptgroup{'names'} };   $target eq 'analyze') {
     my $pick = int(rand($#names+1));   &Apache::response::pick_foil_for_concept($target,
     my $name = $names[$pick];   ['area','text','image'],
     if (defined(@{ $Apache::response::conceptgroup{"$name.area"} })) {   \%Apache::hint::image,
  push @{ $Apache::response::foilgroup{'names'} }, $name;   $parstack,$safeeval);
  $Apache::response::foilgroup{"$name.text"} =      } elsif ($target eq 'edit') {
                                  $Apache::response::conceptgroup{"$name.text"};   $result=&Apache::edit::end_table();
  $Apache::response::foilgroup{"$name.image"} =  
                 $Apache::response::conceptgroup{"$name.image"};  
  push(@{ $Apache::response::foilgroup{"$name.area"} },  
      @{ $Apache::response::conceptgroup{"$name.area"} });  
  my $concept = &Apache::lonxml::get_param('concept',$parstack,  
  $safeeval);  
  $Apache::response::foilgroup{"$name.concept"} = $concept;  
  &Apache::lonxml::debug("Selecting $name in $concept");  
     }  
  }  
     }      }
     return '';      return $result;
   }
   
   sub insert_foil {
       return '
          <foil>
              <image></image>
              <text></text>
              <rectangle></rectangle>
          </foil>
   ';
 }  }
   
 $Apache::imageresponse::curname = '';  $Apache::imageresponse::curname='';
 # ================================================================== Start foil  
 sub start_foil {  sub start_foil {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade') {      if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
    $target eq 'analyze') {
  my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);   my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
  if ($name eq '') { $name=$Apache::lonxml::curdepth; }   if (!$name) {
  if ( $Apache::imageresponse::conceptgroup ) {      &Apache::lonxml::error("Foils without names exist. This can cause problems to malfunction.");
       $name=$Apache::lonxml::curdepth;
    }
    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);      push(@{ $Apache::response::conceptgroup{'names'} }, $name);
  } else {   } else {
     push(@{ $Apache::response::foilgroup{'names'} }, $name);      push(@{ $Apache::response::foilgroup{'names'} }, $name);
Line 212  sub start_foil { Line 364  sub start_foil {
     return '';      return '';
 }  }
   
 # ==================================================================== End foil  
 sub end_foil {  sub end_foil {
     my ($target,$token,$tagstack,$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;
 }  }
   
 # ================================================================== Start text  
 sub start_text {  sub start_text {
     my ($target,$token,$tagstack,$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;
 }  }
   
 # ==================================================================== End text  
 sub end_text {  sub end_text {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web') {      my $result;
       if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
  my $name = $Apache::imageresponse::curname;   my $name = $Apache::imageresponse::curname;
  if ( $Apache::imageresponse::conceptgroup ) {   if ( $Apache::imageresponse::conceptgroup
     $Apache::response::conceptgroup{"$name.text"} =        #&& !&Apache::response::showallfoils()
                                &Apache::lonxml::endredirection;       ) {
       $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
  } else {   } else {
     $Apache::response::foilgroup{"$name.text"} =       $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
                                &Apache::lonxml::endredirection;  
  }   }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
     }      }
     return '';      return $result;
 }  }
   
 # ================================================================= Start image  
 sub start_image {  sub start_image {
     my ($target,$token,$tagstack,$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;
 }  }
   
 # =================================================================== End image  
 sub end_image {  sub end_image {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       my $name = $Apache::imageresponse::curname;
     if ($target eq 'web') {      if ($target eq 'web') {
  my $name = $Apache::imageresponse::curname;  
  my $image = &Apache::lonxml::endredirection;   my $image = &Apache::lonxml::endredirection;
  &Apache::lonxml::debug("out is $image");   &Apache::lonxml::debug("original image is $image");
  if ( $Apache::imageresponse::conceptgroup ) {   if ( $Apache::imageresponse::conceptgroup
        #&& !&Apache::response::showallfoils()
        ) {
     $Apache::response::conceptgroup{"$name.image"} = $image;      $Apache::response::conceptgroup{"$name.image"} = $image;
  } else {   } else {
     $Apache::response::foilgroup{"$name.image"} = $image;      $Apache::response::foilgroup{"$name.image"} = $image;
  }   }
     }      } elsif ($target eq 'analyze') {
     return '';   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;
    $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
    my $width_param = '';
    my $height_param = '';
    my $scaling = .3;
    my $image = Image::Magick->new;
    my $current_figure = $image->Read($src);
    $width_param = $image->Get('width') * $scaling;;
    $height_param = $image->Get('height') * $scaling;;
    undef $image;
    my $epssrc = $src;
    $epssrc =~ s/(\.gif|\.jpg)$/\.eps/i;
    if (not -e $epssrc) {
       my $localfile = $epssrc;
       $localfile =~ s/.*(\/res)/$1/;
       my $file;
       my $path;
       if ($localfile =~ m!(.*)/([^/]*)$!) {
    $file = $2;
    $path = $1.'/'; 
       }
       my $signal_eps = 0;
       my @content_directory = &Apache::lonnet::dirlist($path);
       for (my $iy=0;$iy<=$#content_directory;$iy++) {
    my @tempo_array = split(/&/,$content_directory[$iy]);
    $content_directory[$iy] = $tempo_array[0];
    if ($file eq $tempo_array[0]) {
       $signal_eps = 1;
       last;
    }
       }
       if ($signal_eps) {
    my $eps_file = &Apache::lonnet::getfile($localfile);
       } else {
    $localfile = $src;
    $localfile =~ s/.*(\/res)/$1/;
    my $as = &Apache::lonnet::getfile($src);      
       }
    }
    my $file;
    my $path;
    if ($src =~ m!(.*)/([^/]*)$!) {
       $file = $2;
       $path = $1.'/'; 
    }
    my $newsrc = $src;
    $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
    $file=~s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
    #do we have any specified size of the picture?
    my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval); 
    my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval); 
    my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
    if ($TeXwidth ne '') { 
       $width_param = $TeXwidth; 
    } elsif ($TeXheight ne '') { 
       $width_param = $TeXheight/$height_param*$width_param;
    } elsif ($width ne '') {
       $width_param = $width*$scaling;      
    }
    $width_param=&Apache::randomlabel::adjust_textwidth($width_param);
    #where can we find the picture?
    if (-e $newsrc) {
       if ($path) {
    $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
       }
    } else {
       #care about eps dynamical generation
       $Apache::response::foilgroup{"$name.image"}='\vskip 0 mm '.&Apache::londefdef::eps_generation($src,$file,$width_param);
    }
       } 
       return $result;
 }  }
   
 # ============================================================= Start rectangle  
 sub start_rectangle {  sub start_rectangle {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade') {       my $result='';
  &Apache::lonxml::startredirection;      if ($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 '';      return $result;
 }  }
   
 # ====================================== Grade rectangle (return scalar string)  
 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;  
     my $y1 = $2;  
     my $x2 = $3;  
     my $y2 = $4;  
     &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");      &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
     if ($x1 > $x2) { my $temp = $x1; $x1 = $x2; $x2 = $temp; }      if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
     if ($y1 > $y2) { my $temp = $y1; $y1 = $y2; $y2 = $temp; }      if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
     if ($x => $x1) { if ($x <= $x2) { if ($y => $y1) {      if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
  if ($y <= $y2) { return 'APPROX_ANS'; } } } }   return 'APPROX_ANS';
       }
     return 'INCORRECT';      return 'INCORRECT';
 }  }
   
 # =============================================================== End rectangle  
 sub end_rectangle {  sub end_rectangle {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade') {      my $result;
       if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
    $target eq 'analyze') {
  my $name = $Apache::imageresponse::curname;   my $name = $Apache::imageresponse::curname;
  my $area = &Apache::lonxml::endredirection;   my $area = &Apache::lonxml::endredirection;
    $area=~s/\s//g;
  &Apache::lonxml::debug("out is $area for $name");   &Apache::lonxml::debug("out is $area for $name");
  if ( $Apache::imageresponse::conceptgroup ) {   if ( $Apache::imageresponse::conceptgroup
     push @{ $Apache::response::conceptgroup{"$name.area"} },       #&& !&Apache::response::showallfoils()
           "rectangle:$area";       ) {
       push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
  } else {   } else {
     push @{ $Apache::response::foilgroup{"$name.area"} },      push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
          "rectangle:$area";  
  }   }
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
     }      }
     return '';      return $result;
 }  }
   
 1;  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;
 __END__  __END__
     
Removed from v.1.11  
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  Added in v.1.61

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