--- loncom/homework/chemresponse.pm	2004/03/31 05:23:59	1.32
+++ loncom/homework/chemresponse.pm	2005/02/17 21:42:37	1.46
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # chemical equation style response
 #
-# $Id: chemresponse.pm,v 1.32 2004/03/31 05:23:59 albertel Exp $
+# $Id: chemresponse.pm,v 1.46 2005/02/17 21:42:37 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -32,7 +32,34 @@ use Apache::lonxml;
 use Apache::lonnet;
 
 BEGIN {
-    &Apache::lonxml::register('Apache::chemresponse',('organicresponse','organicstructure','reactionresponse'));
+    &Apache::lonxml::register('Apache::chemresponse',('organicresponse','organicstructure','reactionresponse','chem'));
+}
+
+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 {
@@ -94,8 +121,9 @@ $molecule
 CHEMPAGE
     $body=&HTML::Entities::encode($body,'<>&"');
     $body=~s/\n/ /g;
+    my $docopen=&Apache::lonhtmlcommon::javascript_docopen();
     my $result=<<CHEMINPUT;
-<input type="button" value="Draw Molecule" onClick="javascript:editor=window.open('','','width=500,height=500,scrollbars=no,resizable=yes');editor.document.open('text/html','replace');editor.document.writeln('$body')" />
+<input type="button" value="Draw Molecule" onClick="javascript:editor=window.open('','','width=500,height=500,scrollbars=no,resizable=yes');editor.$docopen;editor.document.writeln('$body')" />
 CHEMINPUT
     return $result;
 }
@@ -108,17 +136,34 @@ sub start_organicresponse {
     if ($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"};
+	if (  &Apache::response::show_answer() ) {
+	    my $jmeanswer=&Apache::lonxml::get_param('jmeanswer',$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();
+	    $result="<img src='/cgi-bin/convertjme.pl?$id'";
+	    if ($options =~ /border/) { $result.= ' border="1"'; }
+	    $result.=' />';
+	    &Apache::lonnet::appenv('cgi.'.$id.'.JME'   =>
+				           &Apache::lonnet::escape($jmeanswer),
+				    'cgi.'.$id.'.PNG'   => 1,
+				    'cgi.'.$id.'.WIDTH' => $width);
 	} else {
-	    $molecule=&Apache::lonxml::get_param('molecule',$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);
+	    }
+	    my $options=&Apache::lonxml::get_param('options',$parstack,
+						   $safeeval);
+	    $result=&separate_jme_window("HWVAL_$id","MOLECULE_$id",$molecule,$options);
+	    $result.= '<input type="hidden" name="MOLECULE_'.$id.'" value="" />';
 	}
-	my $options=&Apache::lonxml::get_param('options',$parstack,
-					       $safeeval);
-	$result=&separate_jme_window("HWVAL_$id","MOLECULE_$id",$molecule,$options);
-	$result.= '<input type="hidden" name="MOLECULE_'.$id.'" value="" />';
     } elsif ($target eq 'edit') {
 	$result .=&Apache::edit::tag_start($target,$token);
 	my $options=&Apache::lonxml::get_param('options',$parstack,
@@ -150,12 +195,14 @@ sub start_organicresponse {
 				      ['reaction','Is a reaction'],
 				      ['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 $result;
@@ -164,7 +211,7 @@ sub start_organicresponse {
 sub end_organicresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
-    if ($target eq 'grade' && defined($ENV{'form.submitted'})) {
+    if ($target eq 'grade' && &Apache::response::submitted()) {
 	&Apache::response::setup_params($$tagstack[-1],$safeeval);
 	my $response = &Apache::response::getresponse();
 	if ( $response =~ /[^\s]/) {
@@ -183,6 +230,9 @@ sub end_organicresponse {
 		    $ad='INCORRECT';
 		}
 	    }
+	    if ($ad && $Apache::lonhomework::type eq 'survey') {
+		$ad='SUBMITTED';
+	    }
 	    &Apache::response::handle_previous(\%previous,$ad);
 	    $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
 	    $Apache::lonhomework::results{"resource.$partid.$id.molecule"}=$ENV{"form.MOLECULE_$id"};
@@ -218,7 +268,7 @@ sub start_organicstructure {
 	    'cgi.'.$id.'.PNG' => 1,
 	    'cgi.'.$id.'.WIDTH' => $width );
     } elsif ($target eq 'tex') {
-	my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,1);
+	my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,undef,1);
 	if (!$texwidth) { $texwidth='90'; }
 	my $molecule=&Apache::lonxml::get_param('molecule',$parstack,$safeeval);
 	my $options=&Apache::lonxml::get_param('options',$parstack,$safeeval);
@@ -281,15 +331,16 @@ sub edit_reaction_button {
     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 $result=<<EDITREACTION;
 <script type="text/javascript">
     function create_reaction_window_${id}_${field} () {
 	editor=window.open('','','width=500,height=270,scrollbars=no,resizable=yes');
-	editor.document.open('text/html','replace');
-	editor.document.writeln('<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><html> <head><title>LON-CAPA Reaction Editor</title></head><frameset rows="30%,*" border="0">  <frame src="/res/adm/pages/reactionresponse/reaction_viewer.html" name="viewer" scrolling="no" />  <frame src="/res/adm/pages/reactionresponse/reaction_editor.html?reaction=$reaction_es&id=$id_es&field=$field_es" name="editor" scrolling="no" /> </frameset> </html>');
+	editor.$docopen;
+	editor.document.writeln('<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><html> <head><title>LON-CAPA Reaction Editor</title></head><frameset rows="30%,*" border="0">  <frame src="/res/adm/pages/reactionresponse/reaction_viewer.html?inhibitmenu=yes" name="viewer" scrolling="no" />  <frame src="/res/adm/pages/reactionresponse/reaction_editor.html?inhibitmenu=yes&reaction=$reaction_es&id=$id_es&field=$field_es" name="editor" scrolling="no" /> </frameset> </html>');
     }
 </script>
-<input type='button' value='Edit Reaction' onClick="javascript:create_reaction_window_${id}_${field}();void(0);" />
+<input type='button' value='Edit Answer' onClick="javascript:create_reaction_window_${id}_${field}();void(0);" />
 EDITREACTION
     return $result;
 }
@@ -304,7 +355,16 @@ sub start_reactionresponse {
 	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 ($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);
+	}
     } elsif ($target eq "edit") {
 	$result .=&Apache::edit::tag_start($target,$token);
 	my $answer=&Apache::lonxml::get_param('answer',$parstack,
@@ -312,11 +372,16 @@ sub start_reactionresponse {
 	$result .='<nobr>'.
 	    &Apache::edit::text_arg('Answer:','answer',$token,40);
 	$result .=&edit_reaction_button($id,&Apache::edit::html_element_name('answer'),$answer).'</nobr>';
+	my $initial=&Apache::lonxml::get_param('initial',$parstack,$safeeval);
+	$result.='<nobr>'.
+	    &Apache::edit::text_arg('Initial Reaction:','initial',$token,40);
+	$result .=&edit_reaction_button($id,&Apache::edit::html_element_name('initial'),$initial).'</nobr>';
 	
 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     }  elsif ($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 $result;
@@ -325,7 +390,7 @@ sub start_reactionresponse {
 sub end_reactionresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
-    if ($target eq 'grade' && defined($ENV{'form.submitted'})) {
+    if ($target eq 'grade' && &Apache::response::submitted()) {
 	&Apache::response::setup_params($$tagstack[-1],$safeeval);
 	my $response = &Apache::response::getresponse();
 	if ( $response =~ /[^\s]/) {
@@ -337,12 +402,16 @@ sub end_reactionresponse {
 	    my $ad;
 	    foreach my $answer (@answers) {
 		&Apache::lonxml::debug("submitted a $response for $answer<br \>\n");
-		if ($response eq $answer) {
+		if (&chem_standard_order($response) eq 
+		    &chem_standard_order($answer)) {
 		    $ad='EXACT_ANS';
 		} else {
 		    $ad='INCORRECT';
 		}
 	    }
+	    if ($ad && $Apache::lonhomework::type eq 'survey') {
+		$ad='SUBMITTED';
+	    }
 	    &Apache::response::handle_previous(\%previous,$ad);
 	    $Apache::lonhomework::results{"resource.$partid.$id.awarddetail"}=$ad;
 	}
@@ -362,5 +431,28 @@ sub end_reactionresponse {
     return $result;
 }
 
+sub start_chem {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+    my $result = '';
+    if ($target eq 'tex' || $target eq 'web') {
+	&Apache::lonxml::startredirection();
+    }    
+    return $result;
+}
+
+sub end_chem {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+    my $result = '';
+    if ($target eq 'tex' || $target eq 'web') {
+	@Apache::scripttag::parser_env = @_;
+	if (!$Apache::lonxml::default_homework_loaded) {
+	    &Apache::lonxml::default_homework_load($safeeval);
+	}
+	my $innards=&Apache::lonxml::endredirection();
+	$result=&Apache::run::run("return &chemparse(q\0$innards\0);",$safeeval);
+    }
+    return $result;
+}
+
 1;
 __END__