--- loncom/xml/lonxml.pm	2006/10/04 19:48:36	1.422
+++ loncom/xml/lonxml.pm	2006/12/28 17:20:36	1.435
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.422 2006/10/04 19:48:36 albertel Exp $
+# $Id: lonxml.pm,v 1.435 2006/12/28 17:20:36 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -88,6 +88,7 @@ use Apache::loncommon();
 use Apache::lonfeedback();
 use Apache::lonmsg();
 use Apache::loncacc();
+use Apache::lonmaxima();
 use Apache::lonlocal;
 
 #==================================================   Main subroutine: xmlparse  
@@ -251,7 +252,7 @@ sub printtokenheader {
     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
     unless ($token) { return ''; }
 
-    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+    my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
     unless ($tsymb) {
 	$tsymb=$symb;
     }
@@ -342,6 +343,11 @@ sub xmlparse {
  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
 				   $safeeval,\%style_for_target,1);
 
+ if (@stack) {
+     &warning("At end of file some tags were still left unclosed, ".
+	      '<tt>&lt;'.join('&gt;</tt>, <tt>&lt;',reverse(@stack)).
+	      '&gt;</tt>');
+ }
  if ($env{'request.uri'}) {
     &writeallows($env{'request.uri'});
  }
@@ -669,6 +675,14 @@ sub init_safespace {
 		  '&chem_standard_order');
   $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
 
+  $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
+  $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
+  $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
+		  '&maxima_cas_formula_fix');
+
+  $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
+		  '&capa_formula_fix');
+
   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
@@ -775,8 +789,8 @@ sub init_safespace {
   $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
   $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
   $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
-  use Data::Dumper;
-  $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&Dumper');
+#  use Data::Dumper;
+#  $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
 #need to inspect this class of ops
 # $safeeval->deny(":base_orig");
   $safeeval->permit("require");
@@ -816,7 +830,7 @@ sub delete_package_recurse {
 sub initialize_rndseed {
     my ($safeeval)=@_;
     my $rndseed;
-    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+    my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
     $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
     my $safeinit = '$external::randomseed="'.$rndseed.'";';
     &Apache::lonxml::debug("Setting rndseed to $rndseed");
@@ -1327,11 +1341,15 @@ FULLPAGE
       my $cleanbut = '';
 
       my $titledisplay=&display_title();
-      my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
-					 'vi' => 'View',
+      my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
+					 'vi' => 'Save and View',
+					 'dv' => 'Discard Edits and View',
+					 'un' => 'undo',
 					 'ed' => 'Edit');
       my $buttons=(<<BUTTONS);
 $cleanbut
+<input type="submit" name="discardview" accesskey="d"  value="$lt{'dv'}" />
+<input type="submit" name="Undo" accesskey="u"  value="$lt{'un'}" /><hr>
 <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
 <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
 BUTTONS
@@ -1411,14 +1429,10 @@ sub handler {
 #
 # Edit action? Save file.
 #
-    unless ($env{'request.state'} eq 'published') {
-	if ($env{'form.savethisfile'}) {
-	    if (&storefile($file,$env{'form.filecont'})) {
-		&Apache::lonxml::info("<font COLOR=\"#0000FF\">".
-				      &mt('Updated').": ".
-				      &Apache::lonlocal::locallocaltime(time).
-				      " </font>");
-	    } 
+    if (!($env{'request.state'} eq 'published')) {
+	if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
+	    my $html_file=&Apache::lonnet::getfile($file);
+	    my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
 	}
     }
     my %mystyle;
@@ -1452,7 +1466,8 @@ ENDNOTFOUND
             &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
 						    ['editmode']);
 	}
-	if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
+	&Apache::lonnet::logthis("edit mode is ".$env{'form.editmode'});
+	if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
 						'',%mystyle);
 	    undef($Apache::lonhomework::parsing_a_task);
@@ -1466,7 +1481,8 @@ ENDNOTFOUND
 # Edit action? Insert editing commands
 #
     unless ($env{'request.state'} eq 'published') {
-	if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
+	if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
+	    {
 	    my $displayfile=$request->uri;
 	    $displayfile=~s/^\/[^\/]*//;
 	    my %options = ();
@@ -1556,6 +1572,7 @@ sub error {
 	    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
 	    my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
 	    my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
+            my $baseurl = &Apache::lonnet::clutter($declutter);
 	    my @userlist;
 	    foreach (keys %users) {
 		my ($user,$domain) = split(/:/, $_);
@@ -1566,8 +1583,11 @@ sub error {
 						      $cdom,$cnum);
 		my $now=time;
 		if ($now-$lastnotified{$key}>86400) {
+                    my $title = &Apache::lonnet::gettitle($symb);
+                    my $sentmessage;
 		    &Apache::lonmsg::user_normal_msg($user,$domain,
-						 "Error [$declutter]",$msg);
+		        "Error [$title]",$msg,'',$baseurl,'','',
+                        \$sentmessage,$symb,$title,1);
 		    &Apache::lonnet::put('nohist_xmlerrornotifications',
 					 {$key => $now},
 					 $cdom,$cnum);		
@@ -1742,48 +1762,6 @@ sub helpinfo {
   return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
 }
 
-# ----------------------------------------------------------------- whichuser
-# returns a list of $symb, $courseid, $domain, $name that is correct for
-# calls to lonnet functions for this setup.
-# - looks for form.grade_ parameters
-sub whichuser {
-  my ($passedsymb)=@_;
-  my ($symb,$courseid,$domain,$name,$publicuser);
-  if (defined($env{'form.grade_symb'})) {
-      my ($tmp_courseid)=
-	  &Apache::loncommon::get_env_multiple('form.grade_courseid');
-      my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
-      if (!$allowed && 
-	  exists($env{'request.course.sec'}) && 
-	  $env{'request.course.sec'} !~ /^\s*$/) {
-	  $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
-					    '/'.$env{'request.course.sec'});
-      }
-      if ($allowed) {
-	  ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
-	  $courseid=$tmp_courseid;
-	  ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
-	  ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
-	  return ($symb,$courseid,$domain,$name,$publicuser);
-      }
-  }
-  if (!$passedsymb) {
-      $symb=&Apache::lonnet::symbread();
-  } else {
-      $symb=$passedsymb;
-  }
-  $courseid=$env{'request.course.id'};
-  $domain=$env{'user.domain'};
-  $name=$env{'user.name'};
-  if ($name eq 'public' && $domain eq 'public') {
-      if (!defined($env{'form.username'})) {
-	  $env{'form.username'}.=time.rand(10000000);
-      }
-      $name.=$env{'form.username'};
-  }
-  return ($symb,$courseid,$domain,$name,$publicuser);
-}
-
 1;
 __END__