Annotation of loncom/homework/imageresponse.pm, revision 1.58.2.2

1.58      albertel    1: 
1.12      albertel    2: # The LearningOnline Network with CAPA
1.14      albertel    3: # image click response style
                      4: #
1.58.2.2! albertel    5: # $Id: imageresponse.pm,v 1.58.2.1 2005/01/31 22:47:43 albertel Exp $
1.14      albertel    6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
                     28: #
1.25      www        29: #FIXME LATER assumes multiple possible submissions but only one is possible 
                     30: #currently
1.3       albertel   31: 
1.1       albertel   32: package Apache::imageresponse;
                     33: use strict;
1.51      albertel   34: use Image::Magick();
                     35: use Apache::randomlylabel();
                     36: use Apache::londefdef();
1.40      albertel   37: use Apache::Constants qw(:common :http);
1.51      albertel   38: use Apache::lonlocal;
1.1       albertel   39: 
1.16      harris41   40: BEGIN {
1.36      albertel   41:     &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
1.1       albertel   42: }
                     43: 
                     44: sub start_imageresponse {
1.36      albertel   45:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     46:     my $result;
                     47:     #when in a radiobutton response use these
1.43      albertel   48:     &Apache::lonxml::register('Apache::imageresponse',
                     49: 			      ('foilgroup','foil','text','image','rectangle',
                     50: 			       'polygon','conceptgroup'));
1.36      albertel   51:     push (@Apache::lonxml::namespace,'imageresponse');
                     52:     my $id = &Apache::response::start_response($parstack,$safeeval);
1.51      albertel   53:     undef(%Apache::response::foilnames);
1.36      albertel   54:     if ($target eq 'meta') {
                     55: 	$result=&Apache::response::meta_package_write('imageresponse');
1.37      albertel   56:     } elsif ($target eq 'analyze') {
                     57: 	my $part_id="$Apache::inputtags::part.$id";
                     58: 	push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
1.36      albertel   59:     }
                     60:     return $result;
1.1       albertel   61: }
                     62: 
                     63: sub end_imageresponse {
1.30      albertel   64:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     65:     &Apache::response::end_response;
                     66:     pop @Apache::lonxml::namespace;
                     67:     &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
                     68:     my $result;
                     69:     if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
1.51      albertel   70:     undef(%Apache::response::foilnames);
1.30      albertel   71:     return $result;
1.1       albertel   72: }
                     73: 
1.20      albertel   74: %Apache::response::foilgroup=();
1.1       albertel   75: sub start_foilgroup {
1.36      albertel   76:     %Apache::response::foilgroup=();
                     77:     $Apache::imageresponse::conceptgroup=0;
1.53      albertel   78:     &Apache::response::pushrandomnumber();
1.36      albertel   79:     return '';
1.1       albertel   80: }
                     81: 
1.2       albertel   82: sub getfoilcounts {
1.36      albertel   83:     my ($parstack,$safeeval)=@_;
1.12      albertel   84: 
1.36      albertel   85:     my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
                     86:     # +1 since instructors will count from 1
                     87:     my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
1.56      albertel   88:     #if (&Apache::response::showallfoils()) { $max=$count; }
1.36      albertel   89:     return ($count,$max);
1.2       albertel   90: }
                     91: 
                     92: sub whichfoils {
1.36      albertel   93:     my ($max)=@_;
                     94:     if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
                     95:     my @names = @{ $Apache::response::foilgroup{'names'} };
                     96:     my @whichopt =();
                     97:     while ((($#whichopt+1) < $max) && ($#names > -1)) {
                     98: 	&Apache::lonxml::debug("Have $#whichopt max is $max");
                     99: 	my $aopt;
1.56      albertel  100: #	if (&Apache::response::showallfoils()) {
                    101: #	    $aopt=0;
                    102: #	} else {
1.36      albertel  103: 	    $aopt=int(&Math::Random::random_uniform() * ($#names+1));
1.56      albertel  104: #	}
1.36      albertel  105: 	&Apache::lonxml::debug("From $#names elms, picking $aopt");
                    106: 	$aopt=splice(@names,$aopt,1);
                    107: 	&Apache::lonxml::debug("Picked $aopt");
                    108: 	push (@whichopt,$aopt);
                    109:     }
                    110:     return @whichopt;
1.2       albertel  111: }
                    112: 
1.40      albertel  113: sub prep_image {
1.42      albertel  114:     my ($image,$mode,$name)=@_;
1.40      albertel  115:     my $part=$Apache::inputtags::part;
1.41      albertel  116:     my $respid=$Apache::inputtags::response['-1'];
                    117:     my $id=&Apache::loncommon::get_cgi_id();
1.49      albertel  118:     my (%x,$i);
1.47      albertel  119:     $x{"cgi.$id.BGIMG"}=&Apache::lonnet::escape($image);
1.41      albertel  120:     my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
1.40      albertel  121:     #draws 2 xs on the image at the clicked location
                    122:     #one in white and then one in red on top of the one in white
1.58      albertel  123:     if (defined($x) && $x=~/\S/ && defined($y) && $y =~/\S/ && !&Apache::response::show_answer()) {
1.40      albertel  124: 	my $length = 6;
                    125: 	my $width = 1;
                    126: 	my $extrawidth = 2;
1.48      albertel  127: 	my $xmin=($x-$length);
                    128: 	my $xmax=($x+$length); 
                    129: 	my $ymin=($y-$length);
                    130: 	my $ymax=($y+$length);
                    131: 
1.49      albertel  132: 	$x{"cgi.$id.OBJTYPE"}.='LINE:';
                    133: 	$i=$x{"cgi.$id.OBJCOUNT"}++;
1.58      albertel  134: 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
1.49      albertel  135: 				      "FFFFFF",($width+$extrawidth)));
                    136: 	$x{"cgi.$id.OBJTYPE"}.='LINE:';
                    137: 	$i=$x{"cgi.$id.OBJCOUNT"}++;
1.58      albertel  138: 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
1.49      albertel  139: 				      "FFFFFF",($width+$extrawidth)));
                    140: 	$x{"cgi.$id.OBJTYPE"}.='LINE:';
                    141: 	$i=$x{"cgi.$id.OBJCOUNT"}++;
1.58      albertel  142: 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
1.49      albertel  143: 				      "FF0000",($width)));
                    144: 	$x{"cgi.$id.OBJTYPE"}.='LINE:';
                    145: 	$i=$x{"cgi.$id.OBJCOUNT"}++;
1.58      albertel  146: 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
1.49      albertel  147: 				      "FF0000",($width)));
1.40      albertel  148:     }
1.42      albertel  149:     if ($mode eq 'answer') {
                    150: 	my $width = 1;
                    151: 	my $extrawidth = 2;
                    152: 	my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
                    153: 	foreach my $area (@areas) {
1.43      albertel  154: 	    if ($area=~/^rectangle:/) {
1.49      albertel  155: 		$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
                    156: 		$i=$x{"cgi.$id.OBJCOUNT"}++;
1.43      albertel  157: 		my ($x1,$y1,$x2,$y2)=
                    158: 		    ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
1.49      albertel  159: 		$x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
1.43      albertel  160: 					      ($width+$extrawidth)));
1.49      albertel  161: 		$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
                    162: 		$i=$x{"cgi.$id.OBJCOUNT"}++;
                    163: 		$x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
1.43      albertel  164: 	    } elsif ($area=~/^polygon:(.*)/) {
1.49      albertel  165: 		$x{"cgi.$id.OBJTYPE"}.='POLYGON:';
                    166: 		$i=$x{"cgi.$id.OBJCOUNT"}++;
                    167: 		$x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
                    168: 		$x{"cgi.$id.OBJEXTRA$i"}=$1;
                    169: 		$x{"cgi.$id.OBJTYPE"}.='POLYGON:';
                    170: 		$i=$x{"cgi.$id.OBJCOUNT"}++;
                    171: 		$x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
                    172: 		$x{"cgi.$id.OBJEXTRA$i"}=$1;
1.43      albertel  173: 	    }
1.42      albertel  174: 	}
                    175:     }
1.41      albertel  176:     &Apache::lonnet::appenv(%x);
                    177:     return $id;
1.40      albertel  178: }
                    179: 
1.2       albertel  180: sub displayfoils {
1.36      albertel  181:     my ($target,@whichopt) = @_;
                    182:     my $result ='';
                    183:     my $name;
                    184:     my $temp=1;
                    185:     foreach $name (@whichopt) {
                    186: 	$result.=$Apache::response::foilgroup{"$name.text"};
                    187: 	&Apache::lonxml::debug("Text is $result");
                    188: 	if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
                    189: 	my $image=$Apache::response::foilgroup{"$name.image"};
                    190: 	&Apache::lonxml::debug("image is $image");
1.40      albertel  191: 	if ( $target eq 'web' && $image !~ /^http:/ ) {
1.47      albertel  192: 	    $image=&clean_up_image($image);
                    193: 	} 
1.40      albertel  194: 	&Apache::lonxml::debug("image is $image");
1.36      albertel  195: 	if ( &Apache::response::show_answer() ) {
                    196: 	    if ($target eq 'tex') {
                    197: 		$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
                    198: 	    } else {
1.42      albertel  199: 		my $token=&prep_image($image,'answer',$name);
1.40      albertel  200: 		$result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
1.36      albertel  201: 	    }
                    202: 	} else {
                    203: 	    if ($target eq 'tex') {
                    204: 		$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
                    205: 	    } else {
1.40      albertel  206: 		my $id=$Apache::inputtags::response['-1'];
                    207: 		my $token=&prep_image($image);
                    208: 		my $temp=1;
                    209: 		$result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".
                    210: 		    "src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
1.36      albertel  211: 	    }
                    212: 	}
                    213: 	$temp++;
                    214:     }
                    215:     return $result;
1.47      albertel  216: }
                    217: 
                    218: sub clean_up_image {
                    219:     my ($image)=@_;
                    220:     if ($image =~ /\s*<img\s*/) {
1.50      albertel  221: 	($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
1.47      albertel  222: 	if ($image !~ /^http:/) {
                    223: 	    $image=&Apache::lonnet::hreflocation('',$image);
                    224: 	}
                    225: 	if (!$image) {
                    226: 	    $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
                    227: 	}
                    228:     } else {
                    229: 	$image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
                    230: 	if (&Apache::lonnet::repcopy($image) ne OK) {
                    231: 	    $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
                    232: 	}
                    233:     }
                    234:     return $image;
1.2       albertel  235: }
                    236: 
1.3       albertel  237: sub gradefoils {
1.36      albertel  238:     my (@whichopt) = @_;
                    239:     my $x;
                    240:     my $y;
                    241:     my $result;
                    242:     my $id=$Apache::inputtags::response['-1'];
                    243:     my $temp=1;
                    244:     foreach my $name (@whichopt) {
                    245: 	$x=$ENV{"form.HWVAL_$id:$temp.x"};
                    246: 	$y=$ENV{"form.HWVAL_$id:$temp.y"};
                    247: 	&Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
                    248: 	if (defined($x) && defined($y) &&
                    249: 	    defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
                    250: 	    my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
                    251: 	    my $grade="INCORRECT";
                    252: 	    foreach my $area (@areas) {
                    253: 		&Apache::lonxml::debug("Area is $area for $name");
                    254: 		$area =~ m/([a-z]*):/;
                    255: 		&Apache::lonxml::debug("Area of type $1");
                    256: 		if ($1 eq 'rectangle') {
                    257: 		    $grade=&grade_rectangle($area,$x,$y);
1.43      albertel  258: 		} elsif ($1 eq 'polygon') {
                    259: 		    $grade=&grade_polygon($area,$x,$y);
1.36      albertel  260: 		} else {
                    261: 		    &Apache::lonxml::error("Unknown area style $area");
                    262: 		}
                    263: 		&Apache::lonxml::debug("Area said $grade");
                    264: 		if ($grade eq 'APPROX_ANS') { last; }
                    265: 	    }
                    266: 	    &Apache::lonxml::debug("Foil was $grade");
                    267: 	    if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
                    268: 	    if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
                    269: 	    &Apache::lonxml::debug("Question is $result");
                    270: 	    $temp++;
1.9       albertel  271: 	}
1.36      albertel  272:     }
1.58.2.1  albertel  273:     my $responsestr="$x:$y";
                    274:     my $part=$Apache::inputtags::part;
                    275:     my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
1.56      albertel  276:     if ($result 
                    277: 	&& $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
1.58.2.1  albertel  278:     &Apache::response::handle_previous(\%previous,$result);
                    279:     $Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr;
                    280:     $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
1.36      albertel  281:     return '';
1.3       albertel  282: }
                    283: 
1.1       albertel  284: sub end_foilgroup {
1.36      albertel  285:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    286:     my $result='';
                    287:     my @whichopt;
1.38      albertel  288:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    289: 	$target eq 'analyze') {
1.36      albertel  290: 	my ($count,$max) = &getfoilcounts($parstack,$safeeval);
                    291: 	if ($count>$max) { $count=$max }
                    292: 	&Apache::lonxml::debug("Count is $count from $max");
                    293: 	@whichopt = &whichfoils($max);
                    294: 	if ($target eq 'web' || $target eq 'tex') {
                    295: 	    $result=&displayfoils($target,@whichopt);
                    296: 	} elsif ($target eq 'grade') {
                    297: 	    if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); }
1.37      albertel  298: 	} elsif ( $target eq 'analyze') {
                    299: 	    &Apache::response::analyze_store_foilgroup(\@whichopt,
                    300: 						      ['text','image','area']);
                    301: 	}
1.36      albertel  302:     } elsif ($target eq 'edit') {
                    303: 	$result=&Apache::edit::end_table();
                    304:     }
1.53      albertel  305:     &Apache::response::poprandomnumber();
1.36      albertel  306:     return $result;
1.1       albertel  307: }
                    308: 
                    309: sub start_conceptgroup {
1.36      albertel  310:     $Apache::imageresponse::conceptgroup=1;
                    311:     %Apache::response::conceptgroup=();
                    312:     return '';
1.1       albertel  313: }
                    314: 
                    315: sub end_conceptgroup {
1.36      albertel  316:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    317:     $Apache::imageresponse::conceptgroup=0;
                    318:     my $result;
1.37      albertel  319:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    320: 	$target eq 'analyze') {
                    321: 	&Apache::response::pick_foil_for_concept($target,
                    322: 						 ['area','text','image'],
                    323: 						 \%Apache::hint::image,
                    324: 						 $parstack,$safeeval);
1.36      albertel  325:     } elsif ($target eq 'edit') {
                    326: 	$result=&Apache::edit::end_table();
                    327:     }
                    328:     return $result;
1.31      albertel  329: }
                    330: 
                    331: sub insert_foil {
                    332:     return '
                    333:        <foil>
                    334:            <image></image>
                    335:            <text></text>
                    336:            <rectangle></rectangle>
                    337:        </foil>
                    338: ';
1.1       albertel  339: }
                    340: 
1.12      albertel  341: $Apache::imageresponse::curname='';
1.1       albertel  342: sub start_foil {
1.36      albertel  343:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.37      albertel  344:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    345: 	$target eq 'analyze') {
1.36      albertel  346: 	my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
                    347: 	if ($name eq '') { $name=$Apache::lonxml::curdepth; }
1.51      albertel  348: 	if (defined($Apache::response::foilnames{$name})) {
                    349: 	    &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
                    350: 	}
1.52      albertel  351: 	$Apache::response::foilnames{$name}++;
1.36      albertel  352: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  353: 	     #&& !&Apache::response::showallfoils()
                    354: 	     ) {
1.36      albertel  355: 	    push(@{ $Apache::response::conceptgroup{'names'} }, $name);
                    356: 	} else {
                    357: 	    push(@{ $Apache::response::foilgroup{'names'} }, $name);
                    358: 	}
                    359: 	$Apache::imageresponse::curname=$name;
                    360:     }
                    361:     return '';
1.1       albertel  362: }
                    363: 
                    364: sub end_foil {
1.26      albertel  365:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    366:     my $result;
                    367:     if ($target eq 'edit') {
                    368: 	$result=&Apache::edit::end_table();
                    369:     }
                    370:     return $result;
1.1       albertel  371: }
                    372: 
                    373: sub start_text {
1.36      albertel  374:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    375:     my $result='';
1.37      albertel  376:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
1.36      albertel  377: 	&Apache::lonxml::startredirection; 
                    378:     } elsif ($target eq 'edit') {
                    379: 	my $descr=&Apache::lonxml::get_all_text('/text',$parser);
                    380: 	$result=&Apache::edit::tag_start($target,$token,'Task Description').
                    381: 	    &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
                    382: 	    &Apache::edit::end_row();
                    383:     } elsif ($target eq "modified") {
1.39      albertel  384: 	$result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
1.36      albertel  385:     }
                    386:     return $result;
1.1       albertel  387: }
                    388: 
                    389: sub end_text {
1.36      albertel  390:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    391:     my $result;
1.37      albertel  392:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
1.36      albertel  393: 	my $name = $Apache::imageresponse::curname;
                    394: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  395: 	     #&& !&Apache::response::showallfoils()
                    396: 	     ) {
1.36      albertel  397: 	    $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
                    398: 	} else {
                    399: 	    $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
                    400: 	}
                    401:     } elsif ($target eq 'edit') {
                    402: 	$result=&Apache::edit::end_table();
                    403:     }
                    404:     return $result;
1.1       albertel  405: }
                    406: 
                    407: sub start_image {
1.36      albertel  408:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    409:     my $result='';
1.37      albertel  410:     if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
1.36      albertel  411: 	&Apache::lonxml::startredirection; 
                    412:     } elsif ($target eq 'edit') {
                    413: 	my $bgimg=&Apache::lonxml::get_all_text('/image',$parser);
                    414: 	$Apache::edit::bgimgsrc=$bgimg;
                    415: 	$Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
                    416: 
                    417: 	$result=&Apache::edit::tag_start($target,$token,'Clickable Image').
                    418: 	    &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
                    419: 	$result.=&Apache::edit::browse(undef,'textnode').' ';
                    420: 	$result.=&Apache::edit::search(undef,'textnode').
                    421: 	    &Apache::edit::end_row();
                    422:     } elsif ($target eq "modified") {
1.39      albertel  423: 	$result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
1.36      albertel  424:     }
                    425:     return $result;
1.1       albertel  426: }
                    427: 
                    428: sub end_image {
1.36      albertel  429:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    430:     my $result;
                    431:     my $name = $Apache::imageresponse::curname;
                    432:     if ($target eq 'web') {
                    433: 	my $image = &Apache::lonxml::endredirection;
                    434: 	&Apache::lonxml::debug("original image is $image");
1.37      albertel  435: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  436: 	     #&& !&Apache::response::showallfoils()
                    437: 	     ) {
1.37      albertel  438: 	    $Apache::response::conceptgroup{"$name.image"} = $image;
                    439: 	} else {
                    440: 	    $Apache::response::foilgroup{"$name.image"} = $image;
                    441: 	}
                    442:     } elsif ($target eq 'analyze') {
                    443: 	my $image = &Apache::lonxml::endredirection;
1.36      albertel  444: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  445: 	     #&& !&Apache::response::showallfoils()
                    446: 	     ) {
1.36      albertel  447: 	    $Apache::response::conceptgroup{"$name.image"} = $image;
                    448: 	} else {
                    449: 	    $Apache::response::foilgroup{"$name.image"} = $image;
                    450: 	}
                    451:     } elsif ($target eq 'edit') {
                    452: 	$result=&Apache::edit::end_table();
                    453:     } elsif ($target eq 'tex') {
                    454: 	my $src = &Apache::lonxml::endredirection;
                    455: 	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
                    456: 	my $width_param = '';
                    457: 	my $height_param = '';
                    458: 	my $scaling = .3;
                    459: 	my $image = Image::Magick->new;
                    460: 	my $current_figure = $image->Read($src);
                    461: 	$width_param = $image->Get('width') * $scaling;;
                    462: 	$height_param = $image->Get('height') * $scaling;;
                    463: 	undef $image;
                    464: 	my $epssrc = $src;
                    465: 	$epssrc =~ s/(\.gif|\.jpg)$/\.eps/i;
                    466: 	if (not -e $epssrc) {
                    467: 	    my $localfile = $epssrc;
                    468: 	    $localfile =~ s/.*(\/res)/$1/;	
                    469: 	    my $file;
                    470: 	    my $path;	
                    471: 	    if ($localfile =~ m!(.*)/([^/]*)$!) {
                    472: 		$file = $2;
                    473: 		$path = $1.'/'; 
                    474: 	    }	
                    475: 	    my $signal_eps = 0;
                    476: 	    my @content_directory = &Apache::lonnet::dirlist($path);
                    477: 	    for (my $iy=0;$iy<=$#content_directory;$iy++) {
                    478: 		my @tempo_array = split(/&/,$content_directory[$iy]);
                    479: 		$content_directory[$iy] = $tempo_array[0];
                    480: 		if ($file eq $tempo_array[0]) {
                    481: 		    $signal_eps = 1;
                    482: 		    last;
                    483: 		}
                    484: 	    }
                    485: 	    if ($signal_eps) {
                    486: 		my $eps_file = &Apache::lonnet::getfile($localfile);
                    487: 	    } else {
                    488: 		$localfile = $src;
                    489: 		$localfile =~ s/.*(\/res)/$1/;	
                    490: 		my $as = &Apache::lonnet::getfile($src);		      
                    491: 	    }
                    492: 	}
1.19      sakharuk  493: 	my $file;
                    494: 	my $path;	
1.36      albertel  495: 	if ($src =~ m!(.*)/([^/]*)$!) {
1.19      sakharuk  496: 	    $file = $2;
                    497: 	    $path = $1.'/'; 
1.36      albertel  498: 	}
                    499: 	my $newsrc = $src;
                    500: 	$newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
                    501: 	$file=~s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
                    502: 	#do we have any specified size of the picture?
                    503: 	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval); 
                    504: 	my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval); 
                    505: 	my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
                    506: 	if ($TeXwidth ne '') { 
                    507: 	    $width_param = $TeXwidth; 
                    508: 	} elsif ($TeXheight ne '') { 
                    509: 	    $width_param = $TeXheight/$height_param*$width_param;
                    510: 	} elsif ($width ne '') {
                    511: 	    $width_param = $width*$scaling;      
                    512: 	}
1.55      albertel  513: 	$width_param=&Apache::randomlabel::adjust_textwidth($width_param);
1.36      albertel  514: 	#where can we find the picture?
                    515: 	if (-e $newsrc) {
                    516: 	    if ($path) {
                    517: 		$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
1.19      sakharuk  518: 	    }
                    519: 	} else {
1.46      sakharuk  520: 	    #care about eps dynamical generation
                    521: 	    $Apache::response::foilgroup{"$name.image"}='\vskip 0 mm '.&Apache::londefdef::eps_generation($src,$file,$width_param);
1.19      sakharuk  522: 	}
1.36      albertel  523:     } 
                    524:     return $result;
1.1       albertel  525: }
                    526: 
                    527: sub start_rectangle {
1.36      albertel  528:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    529:     my $result='';
1.38      albertel  530:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    531: 	$target eq 'analyze') { 
1.36      albertel  532: 	&Apache::lonxml::startredirection; 
                    533:     } elsif ($target eq 'edit') {
                    534: 	my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
                    535: 	$result=&Apache::edit::tag_start($target,$token,'Rectangle').
                    536: 	    &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
1.44      albertel  537: 	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
1.36      albertel  538: 	    &Apache::edit::end_row();
                    539:     } elsif ($target eq "modified") {
1.44      albertel  540: 	&Apache::edit::deletecoorddata();
1.39      albertel  541: 	$result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
1.36      albertel  542:     }
                    543:     return $result;
1.1       albertel  544: }
                    545: 
1.3       albertel  546: sub grade_rectangle {
1.36      albertel  547:     my ($spec,$x,$y) = @_;
                    548:     &Apache::lonxml::debug("Spec is $spec");
1.43      albertel  549:     my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
1.36      albertel  550:     &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
                    551:     if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
                    552:     if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
                    553:     if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
                    554: 	return 'APPROX_ANS';
                    555:     }
                    556:     return 'INCORRECT';
1.3       albertel  557: }
                    558: 
1.1       albertel  559: sub end_rectangle {
1.36      albertel  560:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    561:     my $result;
1.38      albertel  562:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    563: 	$target eq 'analyze') {
1.36      albertel  564: 	my $name = $Apache::imageresponse::curname;
                    565: 	my $area = &Apache::lonxml::endredirection;
1.54      albertel  566: 	$area=~s/\s//g;
1.36      albertel  567: 	&Apache::lonxml::debug("out is $area for $name");
                    568: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  569: 	     #&& !&Apache::response::showallfoils()
                    570: 	     ) {
1.36      albertel  571: 	    push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
                    572: 	} else {
                    573: 	    push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
1.43      albertel  574: 	}
                    575:     } elsif ($target eq 'edit') {
                    576: 	$result=&Apache::edit::end_table();
                    577:     }
                    578:     return $result;
                    579: }
                    580: 
                    581: sub start_polygon {
                    582:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    583:     my $result='';
                    584:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    585: 	$target eq 'analyze') { 
                    586: 	&Apache::lonxml::startredirection; 
                    587:     } elsif ($target eq 'edit') {
                    588: 	my $coords=&Apache::lonxml::get_all_text('/polygon',$parser);
                    589: 	$result=&Apache::edit::tag_start($target,$token,'Polygon').
                    590: 	    &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
1.44      albertel  591: 	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
1.43      albertel  592: 	    &Apache::edit::end_row();
                    593:     } elsif ($target eq "modified") {
                    594: 	$result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
                    595:     }
                    596:     return $result;
                    597: }
                    598: 
                    599: sub grade_polygon {
                    600:     my ($spec,$x,$y) = @_;
                    601:     &Apache::lonxml::debug("Spec is $spec");
                    602:     $spec=~s/^polygon://;
                    603:     my @polygon;
                    604:     foreach my $coord (split('-',$spec)) {
                    605: 	my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
                    606: 	&Apache::lonxml::debug("x $x y $y");
                    607: 	push @polygon, {'x'=>$x,'y'=>$y};
                    608:     }
                    609:     #make end point start point
                    610:     push @polygon, $polygon[0];
                    611:     # cribbed from
                    612:     # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
                    613:     my $crossing = 0;    # the crossing number counter
                    614: 
                    615:     # loop through all edges of the polygon
                    616:     for (my $i=0; $i<$#polygon; $i++) {    # edge from V[i] to V[i+1]
                    617: 	if ((($polygon[$i]->{'y'} <= $y)
                    618: 	     && ($polygon[$i+1]->{'y'} > $y))    # an upward crossing
                    619: 	    || 
                    620: 	    (($polygon[$i]->{'y'} > $y) 
                    621: 	     && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
                    622: 	    # compute the actual edge-ray intersect x-coordinate
                    623:             my $vt = ($y - $polygon[$i]->{'y'}) 
                    624: 		/ ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
                    625:             if ($x < $polygon[$i]->{'x'} + $vt * 
                    626: 		($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
                    627:                 $crossing++;   # a valid crossing of y=P.y right of P.x
                    628: 	    }
                    629: 	}
                    630:     }
                    631: 
                    632:     # 0 if even (out), and 1 if odd (in)
                    633:     if ($crossing%2) {
                    634: 	return 'APPROX_ANS';
                    635:     } else {
                    636: 	return 'INCORRECT';
                    637:     }
                    638: }
                    639: 
                    640: sub end_polygon {
                    641:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                    642:     my $result;
                    643:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
                    644: 	$target eq 'analyze') {
                    645: 	my $name = $Apache::imageresponse::curname;
                    646: 	my $area = &Apache::lonxml::endredirection;
1.48      albertel  647: 	$area=~s/\s*//g;
1.43      albertel  648: 	&Apache::lonxml::debug("out is $area for $name");
                    649: 	if ( $Apache::imageresponse::conceptgroup
1.56      albertel  650: 	     #&& !&Apache::response::showallfoils()
                    651: 	     ) {
1.43      albertel  652: 	    push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
                    653: 	} else {
                    654: 	    push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
1.36      albertel  655: 	}
                    656:     } elsif ($target eq 'edit') {
                    657: 	$result=&Apache::edit::end_table();
                    658:     }
                    659:     return $result;
1.1       albertel  660: }
                    661: 1;
                    662: __END__
                    663:  

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