--- loncom/homework/chemresponse.pm 2005/02/22 21:33:27 1.49 +++ loncom/homework/chemresponse.pm 2021/04/07 22:16:03 1.100 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # chemical equation style response # -# $Id: chemresponse.pm,v 1.49 2005/02/22 21:33:27 albertel Exp $ +# $Id: chemresponse.pm,v 1.100 2021/04/07 22:16:03 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -30,6 +30,10 @@ package Apache::chemresponse; use strict; use Apache::lonxml; use Apache::lonnet; +use Apache::lonlocal; +use lib '/home/httpd/lib/perl/'; +use LONCAPA; + BEGIN { &Apache::lonxml::register('Apache::chemresponse',('organicresponse','organicstructure','reactionresponse','chem')); @@ -63,27 +67,171 @@ sub chem_standard_order { } sub separate_jme_window { - my ($smile_input,$jme_input,$molecule,$options)=@_; + my ($smile_input,$jme_input,$molecule,$options,$shown_text)=@_; + my $usejsme = 1; + if (($env{'request.course.id'}) && ($env{'request.state'} ne 'construct')) { + if (exists($env{'course.'.$env{'request.course.id'}.'.usejsme'})) { + if ($env{'course.'.$env{'request.course.id'}.'.usejsme'} eq '0') { + $usejsme = 0; + } + } else { + my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'}); + if ($domdefs{'usejsme'} eq '0') { + $usejsme = 0; + } + } + } else { + my %domdefs = &Apache::lonnet::get_domain_defaults($env{'course.'.$env{'request.course.id'}.'.domain'}); + if ($domdefs{'usejsme'} eq '0') { + $usejsme = 0; + } + } + if ($usejsme) { + if ($env{'browser.type'} eq 'safari') { + unless ($env{'browser.mobile'}) { + if ($env{'browser.version'} < 534) { + $usejsme = 0; + } + } + } elsif ($env{'browser.type'} eq 'mozilla') { + if ($env{'browser.version'} < 5) { + $usejsme = 0; + } elsif ($env{'browser.info'} =~ /^firefox\-([\d\.]+)/) { + my $firefox = $1; + if ($firefox < 12) { + $usejsme = 0; + } + } + } elsif ($env{'browser.type'} eq 'explorer') { + if ($env{'browser.version'} < 7) { + $usejsme = 0; + } + } elsif ($env{'browser.type'} eq 'opera') { + if ($env{'browser.version'} < 15) { + $usejsme = 0; + } + } + } else { + if ($env{'browser.mobile'}) { + $usejsme = 1; + } + } + my $linkstyle = 'display:none'; + my $creditstyle = 'display:inline'; + if ($env{'browser.type'} eq 'explorer') { + if (($env{'browser.os'} eq 'win') && ($env{'browser.version'} < 9)) { + $linkstyle = 'display:inline'; + $creditstyle = 'display:none'; + } + } my $smilesection; if (defined($smile_input)) { + my $smiles; + if ($usejsme) { + $smiles = 'document.JME.smiles()'; + } else { + $smiles = 'document.applets.JME.smiles()'; + } $smilesection=<'; } - my $body=< - -Molecule Editor + if ($molecule) { + if ($usejsme) { + $molecule = 'document.JME.readMolecule("'.$molecule.'")'; + } else { + $molecule=''; + } + } + my $insert_answer; + if ($shown_text eq '') { + $insert_answer= + '
'; + } + + + + my ($jsme_js,$js,$buttonstyle,$viewportjs,$resizejs); + if ($usejsme) { + $buttonstyle = 'display:none'; + $resizejs =< +function callResize() { + var timer; + clearTimeout(timer); + timer=setTimeout('resize_jsme()',100); +} + +window.onresize = callResize; + +function resize_jsme() { + init_geometry(); + var vph = Geometry.getViewportHeight(); + var vpw = Geometry.getViewportWidth(); + var lowerdivheight = document.getElementById('JMEbuttons').offsetHeight; + var formheight = document.getElementById('JMEform').offsetHeight; + var freevspace = vph-(lowerdivheight+50); + var freehspace = vpw-20; + if (typeof jsmeApplet !== 'undefined') { + jsmeApplet.setSize(freehspace,freevspace); + } +} + +RESIZEJS + $resizejs = &Apache::loncommon::js_ready($resizejs); + $jsme_js = ' +'."\n"; + $js =< +function jsmeOnLoad() { + document.getElementById('JMErefresh').style.display="none"; + document.getElementById('JMEcredits').style.display="inline"; + jsmeApplet = new JSApplet.JSME("jme", "420px", "330px", {"options" : "$options"}); + document.JME = jsmeApplet; + $molecule; + document.getElementById('JMEbuttons').style.display="block"; + callResize(); +} + +function submitSmiles() { + jmeFile = document.JME.jmeFile(); + if (jmeFile == "") { + alert("Nothing to submit"); + } else { + $jmesection + $smilesection + window.close(); + } +} +function openHelpWindow() { + window.open("http://peter-ertl.com/jsme/2013_03/help.html","","scrollbars=yes,resizable=yes,width=500,height=600"); +} + + + +CHEMJS + + $viewportjs = &Apache::loncommon::viewport_geometry_js(); + $viewportjs = ''; + + } else { + $buttonstyle = 'display:block'; + $js =< function submitSmiles() { jmeFile = document.applets.JME.jmeFile(); @@ -98,33 +246,124 @@ function submitSmiles() { function openHelpWindow() { window.open("/adm/jme/jme_help.html","","scrollbars=yes,resizable=yes,width=500,height=600"); } +function substituent(r) {document.applets.JME.setSubstituent(r);} - - +CHEMJS + } + + my $start_page = + &Apache::loncommon::start_page('Molecule Editor',$viewportjs, + {'only_body' => 1, + 'js_ready' => 1, + 'bgcolor' => '#FFFFFF',}); + my $end_page = + &Apache::loncommon::end_page({'js_ready' => 1,}); + my $java_not_enabled=&Apache::lonhtmlcommon::java_not_enabled(); + my %lt = &Apache::lonlocal::texthash( + 'seltext' => 'Select substituent...', + 'close' => 'Close', + 'help' => 'Help', + ); + my $body = " +$jsme_js +$js".'
- -You have to enable Java and JavaScript on your machine. +
+'; + if ($usejsme) { + $body.= <<"ENDCHEM"; +
+
+JSME Molecular Editor courtesy of Peter Ertl (Novartis) and Bruno Bienfait
+
+ENDCHEM + } else { + $body.=< + + + + + + +$java_not_enabled $molecule -
-JME Editor courtesy of Peter Ertl, Novartis - - +
- +JME Editor courtesy of Peter Ertl, Novartis +CHEMPAGE + } + $body .= < +$insert_answer +    - + + +
- - CHEMPAGE - $body=&HTML::Entities::encode($body,'<>&"'); - $body=~s/\n/ /g; + + $body=&Apache::loncommon::js_ready($body); + my $nothing=&Apache::lonhtmlcommon::javascript_nothing(); my $docopen=&Apache::lonhtmlcommon::javascript_docopen(); + my $display=&mt('Draw Molecule'); + if (defined($shown_text)) { $display=&mt($shown_text); } + my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'}; + my $function = + 'LONCAPA_draw_molecule_'.&get_uniq_name(); my $result=< + CHEMINPUT + my $jscall = "javascript:$function();void(0);"; + if ($shown_text eq '') { + $result .=<$display +PENCIL + } else { + $result .= ''; + } + return $result; +} +sub jme_img { + my ($jme,$smile,$width,$options)=@_; + my $id=&Apache::loncommon::get_cgi_id(); + my $result=''.$smile.' + &escape($jme), + 'cgi.'.$id.'.PNG' => 1, + 'cgi.'.$id.'.WIDTH' => $width}); return $result; } @@ -136,32 +375,21 @@ sub start_organicresponse { if ($target eq 'meta') { $result=&Apache::response::meta_package_write('organicresponse'); } elsif ($target eq 'web') { - if ( &Apache::response::show_answer() ) { - my $jmeanswer=&Apache::lonxml::get_param('jmeanswer',$parstack, + my $jmeanswer=&Apache::lonxml::get_param('jmeanswer',$parstack, + $safeeval); + if (&Apache::response::show_answer()) { + my $jmeanswer=&Apache::lonxml::get_param('jmeanswer',$parstack, + $safeeval); + if ($jmeanswer ne '') { + my $options=&Apache::lonxml::get_param('options',$parstack, + $safeeval); + my $width=&Apache::lonxml::get_param('width',$parstack, $safeeval); - my $options=&Apache::lonxml::get_param('options',$parstack, - $safeeval); - my $width=&Apache::lonxml::get_param('width',$parstack, - $safeeval); - my $id=&Apache::loncommon::get_cgi_id(); - $result=" - &Apache::lonnet::escape($jmeanswer), - 'cgi.'.$id.'.PNG' => 1, - 'cgi.'.$id.'.WIDTH' => $width); + my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack, + $safeeval); + $result.=&jme_img($jmeanswer,$answers[0],$width,$options); + } } else { - my $molecule; - if (defined($Apache::lonhomework::history{"resource.$partid.$id.molecule"})) { - $molecule=$Apache::lonhomework::history{"resource.$partid.$id.molecule"}; - } else { - $molecule=&Apache::lonxml::get_param('molecule',$parstack, - $safeeval); - } - my $options=&Apache::lonxml::get_param('options',$parstack, - $safeeval); - $result=&separate_jme_window("HWVAL_$id","MOLECULE_$id",$molecule,$options); $result.= ''; } } elsif ($target eq 'edit') { @@ -169,7 +397,7 @@ sub start_organicresponse { my $options=&Apache::lonxml::get_param('options',$parstack, $safeeval); if ($options !~ /multipart/) { $options.=',multipart'; } - $result .=''. + $result .=''. &Apache::edit::text_arg('Starting Molecule:','molecule', $token,40); my $molecule=&Apache::lonxml::get_param('molecule',$parstack, @@ -177,17 +405,19 @@ sub start_organicresponse { $result .=&separate_jme_window(undef, &Apache::edit::html_element_name('molecule'), $molecule,$options); - $result .='
'; + $result .='
'; $result .=&Apache::edit::text_arg('Correct Answer:','answer', $token,40); - $result .=&Apache::edit::hidden_arg('jmeanswer',$token); + $result .='
'; + $result .=&Apache::edit::text_arg('JME string of the answer - automatically updated by "Insert Answer" in the JME pop-up (click pencil):', + 'jmeanswer',$token); my $jmeanswer=&Apache::lonxml::get_param('jmeanswer',$parstack, $safeeval); $result .=&separate_jme_window( &Apache::edit::html_element_name('answer'), &Apache::edit::html_element_name('jmeanswer'), $jmeanswer,$options); - $result .='
'; + $result .='
'; $result .=&Apache::edit::checked_arg('Options:','options', [ ['autoez','Auto E,Z stereochemistry'], ['multipart','Multipart Structures'], @@ -205,18 +435,30 @@ sub start_organicresponse { 'options','width'); if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } } + return $result; } sub end_organicresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; - if ($target eq 'grade' && &Apache::response::submitted()) { + + my $partid = $Apache::inputtags::part; + my $id = $Apache::inputtags::response['-1']; + + if ($target eq 'grade' + && &Apache::response::submitted() + && $Apache::lonhomework::type eq 'exam') { + + &Apache::response::scored_response($partid,$id); + + } elsif ($target eq 'grade' + && &Apache::response::submitted() + && $Apache::lonhomework::type ne 'exam') { + &Apache::response::setup_params($$tagstack[-1],$safeeval); my $response = &Apache::response::getresponse(); if ( $response =~ /[^\s]/) { - my $partid = $Apache::inputtags::part; - my $id = $Apache::inputtags::response['-1']; my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval); my %previous = &Apache::response::check_for_previous($response,$partid,$id); $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; @@ -230,12 +472,20 @@ sub end_organicresponse { $ad='INCORRECT'; } } - if ($ad && $Apache::lonhomework::type eq 'survey') { - $ad='SUBMITTED'; - } + if ($ad) { + if ($Apache::lonhomework::type eq 'survey') { + $ad='SUBMITTED'; + } elsif ($Apache::lonhomework::type eq 'surveycred') { + $ad='SUBMITTED_CREDIT'; + } elsif ($Apache::lonhomework::type eq 'anonsurvey') { + $ad='ANONYMOUS'; + } elsif ($Apache::lonhomework::type eq 'anonsurveycred') { + $ad='ANONYMOUS_CREDIT'; + } + } &Apache::response::handle_previous(\%previous,$ad); $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; - $Apache::lonhomework::results{"resource.$partid.$id.molecule"}=$ENV{"form.MOLECULE_$id"}; + $Apache::lonhomework::results{"resource.$partid.$id.molecule"}=$env{"form.MOLECULE_$id"}; } } elsif ($target eq "edit") { $result.= &Apache::edit::tag_end($target,$token,''); @@ -248,7 +498,56 @@ sub end_organicresponse { } $result.=&Apache::response::answer_footer('organicresponse'); } - &Apache::response::end_response; + if ($target eq 'web') { + &Apache::response::setup_prior_tries_hash(\&format_prior_answer_organic, + ['molecule']) + } + + if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || + $target eq 'tex' || $target eq 'analyze') { + my $repetition = &Apache::response::repetition(); + &Apache::lonxml::increment_counter($repetition,"$partid.$id"); # part.response + if ($target eq 'analyze') { + $Apache::lonhomework::analyze{"$partid.$id.type"} = 'organicresponse'; + push (@{ $Apache::lonhomework::analyze{"parts"} },"$partid.$id"); + &Apache::lonhomework::set_bubble_lines(); + } + } + if ($target eq 'web' ) { + my ($showpencil,$shown_text); + if ($Apache::inputtags::status['-1'] eq 'CAN_ANSWER') { + $showpencil = 1; + } elsif (&Apache::response::show_answer()) { + my $jmeanswer=&Apache::lonxml::get_param('jmeanswer',$parstack, $safeeval); + if ($jmeanswer eq '') { + $showpencil = 1; + $shown_text="Show Your Last Answer"; + } + } + if ($showpencil) { + my $options=&Apache::lonxml::get_param('options',$parstack, + $safeeval); + + my $molecule; + if (defined($Apache::lonhomework::history{"resource.$partid.$id.molecule"})) { + $molecule=$Apache::lonhomework::history{"resource.$partid.$id.molecule"}; + } else { + $molecule=&Apache::lonxml::get_param('molecule',$parstack, + $safeeval); + } + $result.=&separate_jme_window("HWVAL_$id","MOLECULE_$id",$molecule, + $options,$shown_text); + } + } + &Apache::response::end_response(); + return $result; +} + +sub format_prior_answer_organic { + my ($mode,$answer,$other_data) = @_; + my $result=&mt('Smile representation: [_1]','"'.$answer.'"'); + my $jme=$other_data->[0]; + $result.=&jme_img($jme,$answer,400); return $result; } @@ -264,31 +563,36 @@ sub start_organicstructure { if ($options =~ /border/) { $result.= ' border="1"'; } $result.=' />'; &Apache::lonnet::appenv( - 'cgi.'.$id.'.JME' => &Apache::lonnet::escape($molecule), - 'cgi.'.$id.'.PNG' => 1, - 'cgi.'.$id.'.WIDTH' => $width ); + {'cgi.'.$id.'.JME' => &escape($molecule), + 'cgi.'.$id.'.PNG' => 1, + 'cgi.'.$id.'.WIDTH' => $width}); } elsif ($target eq 'tex') { my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,undef,1); + my $webwidth=&Apache::lonxml::get_param('width', $parstack, $safeeval); + my $webheight=&Apache::lonxml::get_param('height', $parstack, $safeeval); + if (!$webheight) { $webheight = $webwidth; } if (!$texwidth) { $texwidth='90'; } + $result = "%DYNAMICIMAGE:$webwidth:$webheight:$texwidth\n"; my $molecule=&Apache::lonxml::get_param('molecule',$parstack,$safeeval); my $options=&Apache::lonxml::get_param('options',$parstack,$safeeval); - my $filename = $ENV{'user.name'}.'_'.$ENV{'user.domain'}. + my $filename = $env{'user.name'}.'_'.$env{'user.domain'}. '_'.time.'_'.$$.int(rand(1000)).'_organicstructure'; my $id=$filename; &Apache::lonnet::appenv( - 'cgi.'.$id.'.JME' => &Apache::lonnet::escape($molecule), - 'cgi.'.$id.'.PS' => 1, - 'cgi.'.$id.'.WIDTH' => $texwidth ); - $id=&Apache::lonnet::escape($id); + {'cgi.'.$id.'.JME' => &escape($molecule), + 'cgi.'.$id.'.PS' => 1, + 'cgi.'.$id.'.WIDTH' => $texwidth}); + $id=&escape($id); &Apache::lonxml::register_ssi("/cgi-bin/convertjme.pl?$id"); if ($options =~ /border/) { $result.= '\fbox{'; } - $result .= '\graphicspath{{/home/httpd/perl/tmp/}}\includegraphics[width='.$texwidth.' mm]{'.$filename.'.eps}'; + $result .= '\graphicspath{{'.LONCAPA::tempdir(). + '}}\includegraphics[width='.$texwidth.' mm]{'.$filename.'.eps}'; if ($options =~ /border/) { $result.= '} '; } } elsif ($target eq 'edit') { $result .=&Apache::edit::tag_start($target,$token); $result .=&Apache::edit::text_arg('Width (pixels):','width',$token,5); $result .=&Apache::edit::text_arg('TeXwidth (mm):','texwidth',$token,5); - $result .=''; + $result .=''; $result .=&Apache::edit::text_arg('Molecule:','molecule',$token,40); my $molecule=&Apache::lonxml::get_param('molecule',$parstack, $safeeval); @@ -301,7 +605,7 @@ sub start_organicstructure { $result .=&separate_jme_window(undef, &Apache::edit::html_element_name('molecule'), $molecule,$options); - $result.="
"; + $result.="
"; $result .=&Apache::edit::checked_arg('Options:','options', [ ['reaction','Is a reaction'], ['border','Draw a border'] ], @@ -326,24 +630,32 @@ sub end_organicstructure { return $result; } -sub edit_reaction_button { - my ($id,$field,$reaction)=@_; - my $id_es=&Apache::lonnet::escape($id); - my $field_es=&Apache::lonnet::escape($field); - my $reaction_es=&Apache::lonnet::escape($reaction); - my $docopen=&Apache::lonhtmlcommon::javascript_docopen(); - my $result=< - -EDITREACTION +JS_PREVIEW return $result; } @@ -356,29 +668,25 @@ sub start_reactionresponse { } elsif ($target eq 'web') { my $partid = $Apache::inputtags::part; my $id = $Apache::inputtags::response['-1']; - my $reaction=$Apache::lonhomework::history{"resource.$partid.$id.submission"}; - if ($reaction eq '') { $reaction=&Apache::lonxml::get_param('initial',$parstack,$safeeval); } - my $status=$Apache::inputtags::status['-1']; - if ($status eq 'CAN_ANSWER') { - $result.=&edit_reaction_button($id,"HWVAL_$id",$reaction); - } if ( &Apache::response::show_answer() ) { my $ans=&Apache::lonxml::get_param('answer',$parstack,$safeeval); - $ans=~s/(\\|\')/\\$1/g; - $Apache::inputtags::answertxt{$id}=&Apache::run::run("return &chemparse('$ans');",$safeeval); + if (!$Apache::lonxml::default_homework_loaded) { + &Apache::lonxml::default_homework_load($safeeval); + } + @Apache::scripttag::parser_env = @_; + $Apache::inputtags::answertxt{$id}=[&Apache::run::run("return &chemparse(q\0$ans\0);",$safeeval)]; } } elsif ($target eq "edit") { $result .=&Apache::edit::tag_start($target,$token); my $answer=&Apache::lonxml::get_param('answer',$parstack, $safeeval); - $result .=''. + $result .=''. &Apache::edit::text_arg('Answer:','answer',$token,40); - $result .=&edit_reaction_button($id,&Apache::edit::html_element_name('answer'),$answer).''; + $result .= &reaction_preview(&Apache::edit::html_element_name('answer'), $answer).''; my $initial=&Apache::lonxml::get_param('initial',$parstack,$safeeval); - $result.=''. + $result.=''. &Apache::edit::text_arg('Initial Reaction:','initial',$token,40); - $result .=&edit_reaction_button($id,&Apache::edit::html_element_name('initial'),$initial).''; - + $result .= &reaction_preview(&Apache::edit::html_element_name('initial'), $initial).''; $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row(); } elsif ($target eq 'modified') { my $constructtag=&Apache::edit::get_new_args($token,$parstack, @@ -392,12 +700,23 @@ sub start_reactionresponse { sub end_reactionresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; - if ($target eq 'grade' && &Apache::response::submitted()) { + + my $partid = $Apache::inputtags::part; + my $id = $Apache::inputtags::response['-1']; + + if ($target eq 'grade' + && &Apache::response::submitted() + && $Apache::lonhomework::type eq 'exam') { + + &Apache::response::scored_response($partid,$id); + + } elsif ($target eq 'grade' + && &Apache::response::submitted() + && $Apache::lonhomework::type ne 'exam') { + &Apache::response::setup_params($$tagstack[-1],$safeeval); my $response = &Apache::response::getresponse(); if ( $response =~ /[^\s]/) { - my $partid = $Apache::inputtags::part; - my $id = $Apache::inputtags::response['-1']; my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval); my %previous = &Apache::response::check_for_previous($response,$partid,$id); $Apache::lonhomework::results{"resource.$partid.$id.submission"}=$response; @@ -411,9 +730,17 @@ sub end_reactionresponse { $ad='INCORRECT'; } } - if ($ad && $Apache::lonhomework::type eq 'survey') { - $ad='SUBMITTED'; - } + if ($ad) { + if ($Apache::lonhomework::type eq 'survey') { + $ad='SUBMITTED'; + } elsif ($ad && $Apache::lonhomework::type eq 'surveycred') { + $ad='SUBMITTED_CREDIT'; + } elsif ($ad && $Apache::lonhomework::type eq 'anonsurvey') { + $ad='ANONYMOUS'; + } elsif ($ad && $Apache::lonhomework::type eq 'anonsurveycred') { + $ad='ANONYMOUS_CREDIT'; + } + } &Apache::response::handle_previous(\%previous,$ad); $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad; } @@ -429,10 +756,36 @@ sub end_reactionresponse { } $result.=&Apache::response::answer_footer('reactionresponse'); } - &Apache::response::end_response; + if ($target eq 'web') { + &Apache::response::setup_prior_tries_hash(\&format_prior_response_reaction); + } + + if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || + $target eq 'tex' || $target eq 'analyze') { + my $repetition = &Apache::response::repetition(); + &Apache::lonxml::increment_counter($repetition,"$partid.$id"); + if ($target eq 'analyze') { + $Apache::lonhomework::analyze{"$partid.$id.type"} = 'reactionresponse'; + push (@{ $Apache::lonhomework::analyze{"parts"} },"$partid.$id"); + &Apache::lonhomework::set_bubble_lines(); + } + } + my $status=$Apache::inputtags::status['-1']; + if (($target eq 'web') && ($Apache::lonhomework::type ne 'exam') && ($status eq 'CAN_ANSWER')) { + my $reaction=$Apache::lonhomework::history{"resource.$partid.$id.submission"}; + if ($reaction eq '') { $reaction=&Apache::lonxml::get_param('initial',$parstack,$safeeval); } + $result .= &reaction_preview("HWVAL_$id", $reaction); + } + &Apache::response::end_response(); return $result; } +sub format_prior_response_reaction { + my ($mode,$answer) =@_; + return ''. + &HTML::Entities::encode($answer,'"<>&').''; +} + sub start_chem { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_; my $result = ''; @@ -454,5 +807,11 @@ sub end_chem { return $result; } +my $uniq=0; +sub get_uniq_name { + $uniq++; + return 'uniquename'.$uniq; +} + 1; __END__