--- loncom/xml/lonxml.pm	2003/02/14 15:14:37	1.233
+++ loncom/xml/lonxml.pm	2003/03/25 22:51:48	1.241
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.233 2003/02/14 15:14:37 www Exp $
+# $Id: lonxml.pm,v 1.241 2003/03/25 22:51:48 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -145,7 +145,7 @@ $Apache::lonxml::registered=0;
 $Apache::lonxml::request='';
 
 # a problem number counter, and check on ether it is used
-$Apache::lonxml::counter=4;
+$Apache::lonxml::counter=1;
 $Apache::lonxml::counter_changed=0;
 
 #internal check on whether to look at style defs
@@ -376,210 +376,6 @@ sub fontsettings() {
     return $headerstring;
 }
 
-sub registerurl {
-    my $forcereg=shift;
-    my $target = shift;
-    my $result = '';
-    
-    if ($target eq 'edit') {
-        $result .="<script type=\"text/javascrtipt\">\n".
-            "if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
-            &Apache::loncommon::browser_and_searcher_javascript().
-                "\n</script>\n";
-    }
-    if (($ENV{'browser.interface'} eq 'textual') ||
-        ((($ENV{'request.publicaccess'}) || 
-         (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
-        (!$forcereg))) {
-	return $result.
-         '<script type="text/javascript">function LONCAPAreg(){;} function LONCAPAstale(){}</script>';
-    }
-    if ($Apache::lonxml::registered && !$forcereg) { return ''; }
-    $Apache::lonxml::registered=1;
-    my $reopen=&Apache::lonmenu::reopenmenu();
-    my $newmail='';
-    if (&Apache::lonmsg::newmail()) { 
-       $newmail='swmenu.setstatus("you have","messages");';
-    }
-    my $timesync='swmenu.syncclock(1000*'.time.');';
-    if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
-        my $hwkadd='';
-        if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
-	    if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
-		$hwkadd.=(<<ENDSUBM);
-                     swmenu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")',
-                     'View user submissions for this assessment resource');
-ENDSUBM
-            }
-	    if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
-		$hwkadd.=(<<ENDGRDS);
-                     swmenu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")',
-                     'Modify user grades for this assessment resource');
-ENDGRDS
-            }
-	    if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
-		$hwkadd.=(<<ENDPARM);
-                     swmenu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")',
-                     'Modify deadlines, etc, for this assessment resource');
-ENDPARM
-            }
-	}
-        ###
-        ### Determine whether or not to display the 'cstr' button for this
-        ### resource
-        ###
-        my $editbutton = '';
-        if ($ENV{'user.author'}) {
-            if ($ENV{'request.role'}=~/^(ca|au)/) {
-                # Set defaults for authors
-                my ($top,$bottom) = ('con-','struct');
-                my $action = "go('/priv/".$ENV{'user.name'}."');";
-                my $cadom  = $ENV{'request.role.domain'};
-                my $caname = $ENV{'user.name'};
-                my $desc = "Enter my resource construction space";
-                # Set defaults for co-authors
-                if ($ENV{'request.role'} =~ /^ca/) { 
-                    ($cadom,$caname)=($ENV{'request.role'}=~/(\w+)\/(\w+)$/);
-                    ($top,$bottom) = ('co con-','struct');
-                    $action = "go('/priv/".$caname."');";
-                    $desc = "Enter construction space as co-author";
-                }
-                # Check that we are on the correct machine
-                my $home = &Apache::lonnet::homeserver($caname,$cadom);
-                if ($home eq $Apache::lonnet::perlvar{'lonHostID'}) {
-                    $editbutton=&Apache::lonmenu::switch
-                        ('','',6,1,$top,,$bottom,$action,$desc);
-                }
-            }
-            ##
-            ## Determine if user can edit url.
-            ##
-            my $cfile='';
-            my $cfuname='';
-            my $cfudom='';
-            if ($ENV{'request.filename'}) {
-                my $file=&Apache::lonnet::declutter($ENV{'request.filename'});
-                $file=~s/^(\w+)\/(\w+)/\/priv\/$2/;
-                # Chech that the user has permission to edit this resource
-                ($cfuname,$cfudom)=&Apache::loncacc::constructaccess($file,$1);
-                if (defined($cfudom)) {
-                    if (&Apache::lonnet::homeserver($cfuname,$cfudom) 
-                        eq $Apache::lonnet::perlvar{'lonHostID'}) {
-                        $cfile=$file;
-                    }
-                }
-            }        
-            # Finally, turn the button on or off
-            if ($cfile) {
-                $editbutton=&Apache::lonmenu::switch
-                    ('','',6,1,'cstr.gif','edit','resource',
-                     "go('".$cfile."');","Edit this resource");
-            } elsif ($editbutton eq '') {
-                $editbutton = '    swmenu.clearbut(6,1);';
-            }
-        }
-        ###
-        ###
-	$result = (<<ENDREGTHIS);
-     
-<script language="JavaScript">
-// BEGIN LON-CAPA Internal
-
-    function LONCAPAreg() {
-	  swmenu=$reopen;
-          swmenu.clearTimeout(swmenu.menucltim);
-          $timesync
-          $newmail
-	  swmenu.currentURL=window.location.pathname;
-          swmenu.reloadURL=window.location.pathname;
-          swmenu.currentSymb="$ENV{'request.symb'}";
-          swmenu.reloadSymb="$ENV{'request.symb'}";
-          swmenu.currentStale=0;
-          swmenu.clearbut(3,1);
-          swmenu.switchbutton
-       (6,3,'catalog.gif','catalog','info','catalog_info()','Show catalog information');
-          swmenu.switchbutton
-       (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)','Provide my evaluation of this resource');
-          swmenu.switchbutton
-    (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)','Provide feedback messages or contribute to the course discussion about this resource');
-          swmenu.switchbutton
-     (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)','Prepare a printable document');
-          swmenu.switchbutton
-       (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)','Go to the previous resource in the course sequence');
-          swmenu.switchbutton
-     (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)','Go to the next resource in the course sequence');
-          swmenu.switchbutton
-                            (9,1,'sbkm.gif','set','bookmark','set_bookmark()','Set a bookmark for this resource');
-          swmenu.switchbutton
-                         (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()','Use or edit my bookmark collection');
-          swmenu.switchbutton
-                               (9,3,'anot.gif','anno-','tations','annotate()','Make notes and annotations about this resource');
-          $hwkadd
-          $editbutton
-    }
-
-    function LONCAPAstale() {
-	  swmenu=$reopen
-          swmenu.currentStale=1;
-          if (swmenu.reloadURL!='' && swmenu.reloadURL!= null) { 
-             swmenu.switchbutton
-             (3,1,'reload.gif','return','location','go(reloadURL)','Return to the last known location in the course sequence');
-	  }
-          swmenu.clearbut(7,1);
-          swmenu.clearbut(7,2);
-          swmenu.clearbut(7,3);
-          swmenu.menucltim=swmenu.setTimeout(
- 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
- 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3);clearbut(6,1)',
-			  2000);
-
-      }
-
-// END LON-CAPA Internal
-</script>
-ENDREGTHIS
-
-    } else {
-        $result = (<<ENDDONOTREGTHIS);
-
-<script language="JavaScript">
-// BEGIN LON-CAPA Internal
-
-    function LONCAPAreg() {
-	  swmenu=$reopen
-          $timesync
-          swmenu.currentStale=1;
-          swmenu.clearbut(2,1);
-          swmenu.clearbut(2,3);
-          swmenu.clearbut(8,1);
-          swmenu.clearbut(8,2);
-          swmenu.clearbut(8,3);
-          if (swmenu.currentURL) {
-             swmenu.switchbutton
-              (3,1,'reload.gif','return','location','go(currentURL)');
- 	  } else {
-	      swmenu.clearbut(3,1);
-          }
-    }
-
-    function LONCAPAstale() {
-    }
-
-// END LON-CAPA Internal
-</script>
-ENDDONOTREGTHIS
-    }
-    return $result;
-}
-
-sub loadevents() {
-    return 'LONCAPAreg();';
-}
-
-sub unloadevents() {
-    return 'LONCAPAstale();';
-}
-
 sub printalltags {
   my $temp;
   foreach $temp (sort keys %Apache::lonxml::alltags) {
@@ -661,22 +457,20 @@ sub htmlclean {
 
 sub latex_special_symbols {
     my ($current_token,$stack,$parstack,$where)=@_;
-    if ($where=='header') {
-      $current_token =~ s/_/ /g;
-      $current_token =~ s/\^/ /g;
-      $current_token =~ s/&/\\&/g;
+    if ($where eq 'header') {
+	$current_token =~ s/(\\|_|\^)/ /g;
+	$current_token =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
     } else {
-     $current_token=~s/\\ /\\char92 /g;
-     $current_token=~s/\^/\\char94 /g;
-     $current_token=~s/\~/\\char126 /g;
-     $current_token=~s/(&[^a-z\#])/\\$1/g;
-     $current_token=~s/([^&])\#/$1\\#/g;
-     $current_token=~s/(\$|_|{|})/\\$1/g;
-     $current_token=~s/\\char92 /\\texttt{\\char92}/g;
-     $current_token=~s/>/\$>\$/g; #more
-     $current_token=~s/</\$<\$/g; #less
-     if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
-     if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
+	$current_token=~s/\\ /\\char92 /g;
+	$current_token=~s/\^/\\char94 /g;
+	$current_token=~s/\~/\\char126 /g;
+	$current_token=~s/(&[^a-z\#])/\\$1/g;
+	$current_token=~s/([^&])\#/$1\\#/g;
+	$current_token=~s/(\$|_|{|})/\\$1/g;
+	$current_token=~s/\\char92 /\\texttt{\\char92}/g;
+	$current_token=~s/(>|<)/\$$1\$/g; #more or less
+	if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
+	if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
     }
     return $current_token;
 }
@@ -692,7 +486,8 @@ sub inner_xmlparse {
 	if ($metamode<1) {
 	    my $text=$token->[1];
 	    if ($token->[0] eq 'C' && $target eq 'tex') {
-		$text = '%'.$text."\n";
+		$text = '';
+#		$text = '%'.$text."\n";
 	    }
 	    $result.=$text;
 	}
@@ -796,6 +591,8 @@ sub callsub {
     my $sub1;
     no strict 'refs';
     my $tag=$token->[1];
+# get utterly rid of extended html tags
+    if ($tag=~/^x\-/i) { return ''; }
     my $space=$Apache::lonxml::alltags{$tag}[-1];
     if (!$space) {
      	$tag=~tr/A-Z/a-z/;
@@ -998,7 +795,7 @@ sub default_homework_load {
     my ($safeeval)=@_;
     &Apache::lonxml::debug('Loading default_homework');
     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
-    if ($default == -1) {
+    if ($default eq -1) {
 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
     } else {
 	&Apache::run::run($default,$safeeval);
@@ -1097,7 +894,7 @@ sub increment_counter {
 sub init_counter {
     if (defined($ENV{'form.counter'})) {
 	$Apache::lonxml::counter=$ENV{'form.counter'};
-    } elsif (not defined($Apache::lonxml::counter)) {
+    } else {
 	$Apache::lonxml::counter=1;
 	&store_counter();
     }
@@ -1303,6 +1100,13 @@ sub inserteditinfo {
       my ($result,$filecontents)=@_;
       $filecontents = &HTML::Entities::encode($filecontents);
 #      my $editheader='<a href="#editsection">Edit below</a><hr />';
+      my $xml_help = '<table><tr><td>'.
+	  &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
+					      undef,undef,600)
+	      .'</td><td>'.
+          &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
+					      undef,undef,600)
+	      .'</td></tr></table>';
       my $buttons=(<<BUTTONS);
 <input type="submit" name="attemptclean" 
        value="Save and then attempt to clean HTML" />
@@ -1313,6 +1117,7 @@ BUTTONS
 <hr />
 <a name="editsection" />
 <form method="post">
+$xml_help
 <input type="hidden" name="editmode" value="Edit" />
 $buttons<br />
 <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
@@ -1382,7 +1187,7 @@ sub handler {
   my %mystyle;
   my $result = '';
   my $filecontents=&Apache::lonnet::getfile($file);
-  if ($filecontents == -1) {
+  if ($filecontents eq -1) {
     $result=(<<ENDNOTFOUND);
 <html>
 <head>