--- loncom/homework/chemresponse.pm 2003/10/16 18:30:46 1.15 +++ loncom/homework/chemresponse.pm 2017/01/04 20:09:08 1.99 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # chemical equation style response # -# $Id: chemresponse.pm,v 1.15 2003/10/16 18:30:46 albertel Exp $ +# $Id: chemresponse.pm,v 1.99 2017/01/04 20:09:08 damieng Exp $ # # Copyright Michigan State University Board of Trustees # @@ -30,72 +30,340 @@ 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')); + &Apache::lonxml::register('Apache::chemresponse',('organicresponse','organicstructure','reactionresponse','chem')); } -sub seperate_jme_window { - my ($smile_input,$jme_input,$molecule,$options)=@_; +sub chem_standard_order { + my ($reaction) = @_; + my ($re,$pr) = split(/->|<=>/,$reaction); + my @reactants = split(/\s\+/,$re); + my @products = split(/\s\+/,$pr); + foreach my $substance (@reactants,@products) { + $substance =~ s/(\^\d*)\s+/$1_/g; # protect superscript space + $substance =~ s/\s*//g; # strip whitespace + $substance =~ s/_/ /g; # restore superscript space + } + @reactants = sort @reactants; + @products = sort @products; + my $standard = ''; + foreach my $substance (@reactants) { + $standard .= $substance; + $standard .= ' + '; + } + $standard =~ s/ \+ $//; # get rid of trailing plus sign + $standard .= ' -> '; + foreach my $substance (@products) { + $standard .= $substance; + $standard .= ' + '; + } + $standard =~ s/ \+ $//; # get rid of trailing plus sign + return $standard; +} + +sub separate_jme_window { + my ($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 - +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"); + document.JME = jsmeApplet; + $molecule; + document.getElementById('JMEbuttons').style.display="block"; + callResize(); +} + function submitSmiles() { - smiles = document.applets.JME.smiles(); - if (smiles == "") { - alert("Nothing to submit"); + 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(); + if (jmeFile == "") { + alert("Nothing to submit"); + } else { $jmesection + $smilesection window.close(); } } 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; } @@ -105,71 +373,92 @@ sub start_organicresponse { my $partid = $Apache::inputtags::part; my $id = &Apache::response::start_response($parstack,$safeeval); if ($target eq 'meta') { + $result=&Apache::response::meta_package_write('organicresponse'); } elsif ($target eq 'web') { - 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, + 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, + $safeeval); + my (@answers)=&Apache::lonxml::get_param_var('answer',$parstack, + $safeeval); + $result.=&jme_img($jmeanswer,$answers[0],$width,$options); + } + } else { + $result.= ''; } - my $options=&Apache::lonxml::get_param('options',$parstack, - $safeeval); - $result=&seperate_jme_window("HWVAL_$id","MOLECULE_$id",$molecule,$options); - $result.= ''; } elsif ($target eq 'edit') { $result .=&Apache::edit::tag_start($target,$token); 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, $safeeval); - $result .=&seperate_jme_window(undef, + $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 .=&seperate_jme_window( + $result .=&separate_jme_window( &Apache::edit::html_element_name('answer'), &Apache::edit::html_element_name('jmeanswer'), $jmeanswer,$options); - $result .='
'; + $result .='
'; $result .=&Apache::edit::checked_arg('Options:','options', - [ ['autoez','Auto E,Z sterochemistry'], - ['multipart','MultiPart Structures'], - ['hydrogens','Show Hydrogens'], + [ ['autoez','Auto E,Z stereochemistry'], + ['multipart','Multipart Structures'], ['nostereo','No stereochemistry'], ['reaction','Is a reaction'], - ['number','Able to number atoms'], - ['border','Draw a border'] ], + ['number','Able to number atoms'] ], ,$token); + $result .=&Apache::edit::text_arg('Width of correct answer image:', + 'width',$token,10); $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row(); } elsif ($target eq 'modified') { my $constructtag=&Apache::edit::get_new_args($token,$parstack, $safeeval,'molecule', 'answer','jmeanswer', - 'options'); + 'options','width'); if ($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' && defined($ENV{'form.submitted'})) { - &Apache::response::setup_params($$tagstack[-1]); + + my $partid = $Apache::inputtags::part; + my $id = $Apache::inputtags::response['-1']; + + if ($target eq 'grade' + && &Apache::response::submitted() + && $Apache::lonhomework::type eq 'exam') { + + &Apache::response::scored_response($partid,$id); + + } elsif ($target eq 'grade' + && &Apache::response::submitted() + && $Apache::lonhomework::type ne 'exam') { + + &Apache::response::setup_params($$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; @@ -183,9 +472,20 @@ sub end_organicresponse { $ad='INCORRECT'; } } + if ($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,''); @@ -198,7 +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; } @@ -207,20 +556,43 @@ sub start_organicstructure { my $result; if ($target eq 'web') { my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval); - my $height=&Apache::lonxml::get_param('height',$parstack,$safeeval); my $molecule=&Apache::lonxml::get_param('molecule',$parstack,$safeeval); my $options=&Apache::lonxml::get_param('options',$parstack,$safeeval); - $result=< - - - -CHEMOUTPUT + my $id=&Apache::loncommon::get_cgi_id(); + $result=" &escape($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'}. + '_'.time.'_'.$$.int(rand(1000)).'_organicstructure'; + my $id=$filename; + &Apache::lonnet::appenv( + {'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{{'.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:','width',$token,5); - $result .=&Apache::edit::text_arg('Height:','height',$token,5); - $result .=''; + $result .=&Apache::edit::text_arg('Width (pixels):','width',$token,5); + $result .=&Apache::edit::text_arg('TeXwidth (mm):','texwidth',$token,5); + $result .=''; $result .=&Apache::edit::text_arg('Molecule:','molecule',$token,40); my $molecule=&Apache::lonxml::get_param('molecule',$parstack, $safeeval); @@ -230,20 +602,19 @@ CHEMOUTPUT $options.= ',multipart,number'; } - $result .=&seperate_jme_window(undef, + $result .=&separate_jme_window(undef, &Apache::edit::html_element_name('molecule'), $molecule,$options); - $result.="
"; + $result.="
"; $result .=&Apache::edit::checked_arg('Options:','options', - [ ['hydrogens','Show Hydrogens'], - ['reaction','Is a reaction'], + [ ['reaction','Is a reaction'], ['border','Draw a border'] ], $token); - $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row(); + $result .=&Apache::edit::end_row(); } elsif ($target eq 'modified') { my $constructtag=&Apache::edit::get_new_args($token,$parstack, $safeeval,'molecule', - 'width','height', + 'width','texwidth', 'options'); if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } } @@ -259,21 +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 $result=< - -EDITREACTION +JS_PREVIEW return $result; } @@ -282,23 +664,34 @@ sub start_reactionresponse { my $result; my $id = &Apache::response::start_response($parstack,$safeeval); if ($target eq 'meta') { + $result=&Apache::response::meta_package_write('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"}; - $result.=&edit_reaction_button($id,"HWVAL_$id",$reaction); + if ( &Apache::response::show_answer() ) { + my $ans=&Apache::lonxml::get_param('answer',$parstack,$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.=''. + &Apache::edit::text_arg('Initial Reaction:','initial',$token,40); + $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, - $safeeval,'answer'); + $safeeval,'answer', + 'initial'); if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } } return $result; @@ -307,24 +700,47 @@ sub start_reactionresponse { sub end_reactionresponse { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; - if ($target eq 'grade' && defined($ENV{'form.submitted'})) { - &Apache::response::setup_params($$tagstack[-1]); + + 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; my $ad; foreach my $answer (@answers) { &Apache::lonxml::debug("submitted a $response for $answer
\n"); - if ($response eq $answer) { + if (&chem_standard_order($response) eq + &chem_standard_order($answer)) { $ad='EXACT_ANS'; } else { $ad='INCORRECT'; } } + 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; } @@ -340,9 +756,62 @@ 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 = ''; + my $inside = &Apache::lonxml::get_all_text_unbalanced("/chem",$parser); + if ($target eq 'tex' || $target eq 'web') { + $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]); + if (!$Apache::lonxml::default_homework_loaded) { + &Apache::lonxml::default_homework_load($safeeval); + } + @Apache::scripttag::parser_env = @_; + $result=&Apache::run::run("return &chemparse(q\0$inside\0);",$safeeval); + } + return $result; +} + +sub end_chem { + my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_; + my $result = ''; + return $result; +} + +my $uniq=0; +sub get_uniq_name { + $uniq++; + return 'uniquename'.$uniq; +} + 1; __END__