# The LearningOnline Network with CAPA # image click response style # # $Id: imageresponse.pm,v 1.78 2006/05/30 12:45:37 www Exp $ # # 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; use strict; use Image::Magick(); use Apache::randomlylabel(); use Apache::londefdef(); use Apache::Constants qw(:common :http); use Apache::lonlocal; use Apache::lonnet; use lib '/home/httpd/lib/perl/'; use LONCAPA; BEGIN { &Apache::lonxml::register('Apache::imageresponse',('imageresponse')); } sub start_imageresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; #when in a radiobutton response use these &Apache::lonxml::register('Apache::imageresponse', ('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 $result; } sub end_imageresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; pop(@Apache::lonxml::namespace); &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup')); my $result; if ($target eq 'edit') { $result=&Apache::edit::end_table(); } elsif ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') { $result=&Apache::inputtags::exam_score_line($target); } undef(%Apache::response::foilnames); if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze') { &Apache::lonxml::increment_counter(&Apache::response::repetition()); } &Apache::response::end_response(); return $result; } %Apache::response::foilgroup=(); sub start_foilgroup { %Apache::response::foilgroup=(); $Apache::imageresponse::conceptgroup=0; &Apache::response::pushrandomnumber(); return ''; } sub getfoilcounts { my ($parstack,$safeeval)=@_; my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2'); # +1 since instructors will count from 1 my $count = $#{ $Apache::response::foilgroup{'names'} }+1; #if (&Apache::response::showallfoils()) { $max=$count; } return ($count,$max); } sub whichfoils { my ($max)=@_; if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; } my @names = @{ $Apache::response::foilgroup{'names'} }; my @whichopt =(); while ((($#whichopt+1) < $max) && ($#names > -1)) { &Apache::lonxml::debug("Have $#whichopt max is $max"); 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"); $aopt=splice(@names,$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"}=&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() && $mode ne 'answeronly') { 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' || $mode eq 'answeronly') { 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 $id; } sub displayfoils { my ($target,@whichopt) = @_; my $result =''; my $name; my $temp=1; foreach $name (@whichopt) { $result.=$Apache::response::foilgroup{"$name.text"}; &Apache::lonxml::debug("Text is $result"); if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="
\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); $result.="
\n"; } } else { if ($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.="
\n"; } } $temp++; } return $result; } sub display_answers { my ($target,$whichopt)=@_; my $result; foreach my $name (@$whichopt) { my $image=$Apache::response::foilgroup{"$name.image"}; &Apache::lonxml::debug("image is $image"); if ( $target eq 'web' && $image !~ /^http:/ ) { $image = &clean_up_image($image); } my $token=&prep_image($image,'answeronly',$name); $result.=&Apache::response::answer_header('imageresponse'); $result.=&Apache::response::answer_part('imageresponse',"
\n"); $result.=&Apache::response::answer_footer('imageresponse'); } return $result; } sub clean_up_image { my ($image)=@_; if ($image =~ /\s*$max) { $count=$max } &Apache::lonxml::debug("Count is $count from $max"); @whichopt = &whichfoils($max); if ($target eq 'web' || $target eq 'tex') { $result=&displayfoils($target,@whichopt); } elsif ($target eq 'grade') { if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); } } elsif ( $target eq 'analyze') { &Apache::response::analyze_store_foilgroup(\@whichopt, ['text','image','area']); } elsif ($target eq 'answer' && $env{'form.answer_output_mode'} ne 'tex') { $result=&display_answers($target,\@whichopt); } } elsif ($target eq 'edit') { $result=&Apache::edit::end_table(); } &Apache::response::poprandomnumber(); return $result; } sub start_conceptgroup { $Apache::imageresponse::conceptgroup=1; %Apache::response::conceptgroup=(); return ''; } sub end_conceptgroup { my ($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 ' '; } $Apache::imageresponse::curname=''; sub start_foil { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || $target eq 'analyze' || $target eq 'answer') { my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval); if ($name eq "") { &Apache::lonxml::warning("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 [_1] 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 $result;; } sub end_foil { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'edit') { $result=&Apache::edit::end_table(); } return $result; } sub start_text { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze' || $target eq 'answer') { &Apache::lonxml::startredirection; } elsif ($target eq 'edit') { my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style); $result=&Apache::edit::tag_start($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 $result; } sub end_text { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze' || $target eq 'answer') { my $name = $Apache::imageresponse::curname; if ( $Apache::imageresponse::conceptgroup #&& !&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 $result; } sub start_image { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze' || $target eq 'answer') { &Apache::lonxml::startredirection; } elsif ($target eq 'edit') { my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style); $Apache::edit::bgimgsrc=$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 $result; } sub end_image { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; my $name = $Apache::imageresponse::curname; if ($target eq 'web' || $target eq 'answer') { my $image = &Apache::lonxml::endredirection(); &Apache::lonxml::debug("original image is $image"); if ( $Apache::imageresponse::conceptgroup #&& !&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 $result; } sub start_rectangle { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result=''; if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || $target eq 'analyze' || $target eq 'answer') { &Apache::lonxml::startredirection; } elsif ($target eq 'edit') { my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style); $result=&Apache::edit::tag_start($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 $result; } sub grade_rectangle { my ($spec,$x,$y) = @_; &Apache::lonxml::debug("Spec is $spec"); my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/); &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2"); if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; } if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; } if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) { return 'APPROX_ANS'; } return 'INCORRECT'; } sub end_rectangle { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' || $target eq 'analyze' || $target eq 'answer') { 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"} },"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' || $target eq 'answer') { &Apache::lonxml::startredirection; } elsif ($target eq 'edit') { my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style); $result=&Apache::edit::tag_start($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