--- loncom/xml/lonxml.pm	2002/05/16 17:05:02	1.170
+++ loncom/xml/lonxml.pm	2002/11/06 22:36:08	1.211
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.170 2002/05/16 17:05:02 www Exp $
+# $Id: lonxml.pm,v 1.211 2002/11/06 22:36:08 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -60,7 +60,7 @@
 
 package Apache::lonxml; 
 use vars 
-qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode);
+qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
 use strict;
 use HTML::LCParser();
 use HTML::TreeBuilder();
@@ -99,11 +99,17 @@ use Apache::edit();
 use Apache::lonnet();
 use Apache::File();
 use Apache::loncommon();
+use Apache::lonfeedback();
+use Apache::lonmsg();
 
 #==================================================   Main subroutine: xmlparse  
 #debugging control, to turn on debugging modify the correct handler
 $Apache::lonxml::debug=0;
 
+# keeps count of the number of warnings and errors generated in a parse
+$warningcount=0;
+$errorcount=0;
+
 #path to the directory containing the file currently being processed
 @pwd=();
 
@@ -135,6 +141,13 @@ $prevent_entity_encode=0;
 # has the dynamic menu been updated to know about this resource
 $Apache::lonxml::registered=0;
 
+# a pointer the the Apache request object
+$Apache::lonxml::request='';
+
+# a problem number counter, and check on hether it is used
+$Apache::lonxml::counter=0;
+$Apache::lonxml::counter_changed=0;
+
 sub xmlbegin {
   my $output='';
   if ($ENV{'browser.mathml'}) {
@@ -151,6 +164,7 @@ sub xmlbegin {
 }
 
 sub xmlend {
+    my ($discussiononly,$symb)=@_;
     my $discussion='';
     if ($ENV{'request.course.id'}) {
        my $crs='/'.$ENV{'request.course.id'};
@@ -159,32 +173,47 @@ sub xmlend {
        }                 
        $crs=~s/\_/\//g;
        my $seeid=&Apache::lonnet::allowed('rin',$crs);
-       my $symb=&Apache::lonnet::symbread();
+       unless ($symb) {
+           $symb=&Apache::lonnet::symbread();
+       }
        if ($symb) {
           my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
                      $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
 		     $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
           if ($contrib{'version'}) {
-              $discussion.=
-                  '<address><hr /><h2>Course Discussion of Resource</h2>';
+              unless ($discussiononly) {
+                 $discussion.=
+                  '<address><hr />';
+	     }
               my $idx;
               for ($idx=1;$idx<=$contrib{'version'};$idx++) {
 		my $hidden=($contrib{'hidden'}=~/\.$idx\./);
 		unless (($hidden) && (!$seeid)) {
                  my $message=$contrib{$idx.':message'};
                  $message=~s/\n/\<br \/\>/g;
+		 $message=&Apache::lontexconvert::msgtexconverted($message);
                  if ($message) {
                   if ($hidden) {
 		      $message='<font color="#888888">'.$message.'</font>';
                   }
+                  my $screenname=&Apache::loncommon::screenname(
+                               $contrib{$idx.':sendername'},
+			       $contrib{$idx.':senderdomain'});
+                  my $plainname=&Apache::loncommon::nickname(
+                               $contrib{$idx.':sendername'},
+			       $contrib{$idx.':senderdomain'});
+
                   my $sender='Anonymous';
                   if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
-                      $sender=$contrib{$idx.':plainname'}.' ('.
+                      $sender=&Apache::loncommon::aboutmewrapper(
+                               $plainname,
+                               $contrib{$idx.':sendername'},
+                               $contrib{$idx.':senderdomain'}).' ('.
                               $contrib{$idx.':sendername'}.' at '.
 		      $contrib{$idx.':senderdomain'}.')';
                       if ($contrib{$idx.':anonymous'}) {
 			  $sender.=' [anonymous] '.
-                                     $contrib{$idx.':screenname'};
+                                     $screenname;
                       }
                       if ($seeid) {
 			  if ($hidden) {
@@ -196,8 +225,8 @@ sub xmlend {
 			  }
                       }                   
                   } else {
-                      if ($contrib{$idx.':screenname'}) {
-			  $sender='<i>'.$contrib{$idx.':screenname'}.'</i>';
+                      if ($screenname) {
+			  $sender='<i>'.$screenname.'</i>';
                       }
                   }
 		  $discussion.='<p><b>'.$sender.'</b> ('.
@@ -207,11 +236,28 @@ sub xmlend {
 	        }
                } 
               }
-              $discussion.='</address>';
+              unless ($discussiononly) {
+                 $discussion.='</address>';
+	      }
+          }
+          if ($discussiononly) {
+	      $discussion.=(<<ENDDISCUSS);
+<form action="/adm/feedback" method="post" name="mailform">
+<input type="submit" name="discuss" value="Post Discussion" />
+<input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
+<input type="hidden" name="symb" value="$symb" />
+<input type="hidden" name="sendit" value="true" />
+<br />
+<font size="1">Note: in anonymous discussion, your name is visible only to
+course faculty</font><br />
+<textarea name=comment cols=60 rows=10 wrap=hard></textarea>
+</form>
+ENDDISCUSS
+             $discussion.=&Apache::lonfeedback::generate_preview_button();
           }
        }
     }
-    return $discussion.'</html>';
+    return $discussion.($discussiononly?'':'</html>');
 }
 
 sub tokeninputfield {
@@ -328,15 +374,28 @@ sub registerurl {
     my $forcereg=shift;
     my $target = shift;
     my $result = '';
-    if (($ENV{'request.publicaccess'}) || 
-       ($ENV{'REQUEST_URI'} eq '/res/adm/pages/menu.html')) {
-	return 
+    
+    if ($target eq 'edit') {
+        $result .="<script>\n".
+            "if (typeof menu != 'undefined') {menu.currentURL=null;}\n".
+            &Apache::loncommon::browser_and_searcher_javascript().
+                "\n</script>\n";
+    }
+    if ((($ENV{'request.publicaccess'}) || 
+         (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
+        (!$forcereg)) {
+	return $result.
          '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
     }
     if ($Apache::lonxml::registered && !$forcereg) { return ''; }
     $Apache::lonxml::registered=1;
     my $nothing='';
     if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
+    my $newmail='';
+    if (&Apache::lonmsg::newmail()) { 
+       $newmail='menu.setstatus("you have","messages");';
+    }
+    my $timesync='menu.syncclock(1000*'.time.');';
     if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
         my $hwkadd='';
         if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
@@ -347,7 +406,7 @@ ENDSUBM
             }
 	    if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
 		$hwkadd.=(<<ENDGRDS);
-                     menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","viewgrades")');
+                     menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")');
 ENDGRDS
             }
 	    if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
@@ -364,7 +423,10 @@ ENDPARM
     function LONCAPAreg() {
 	  menu=window.open("$nothing","LONCAPAmenu","",false);
           menu.clearTimeout(menu.menucltim);
+          $timesync
+          $newmail
 	  menu.currentURL=window.location.pathname;
+          menu.reloadURL=window.location.pathname;
           menu.currentStale=0;
           menu.clearbut(3,1);
           menu.switchbutton
@@ -372,7 +434,7 @@ ENDPARM
           menu.switchbutton
        (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
           menu.switchbutton
-    (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)');
+    (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)');
           menu.switchbutton
      (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
           menu.switchbutton
@@ -391,8 +453,10 @@ ENDPARM
     function LONCAPAstale() {
 	  menu=window.open("$nothing","LONCAPAmenu","",false);
           menu.currentStale=1;
-          menu.switchbutton
-             (3,1,'reload.gif','return','location','go(currentURL)');
+          if (menu.reloadURL!='' && menu.reloadURL!= null) { 
+             menu.switchbutton
+             (3,1,'reload.gif','return','location','go(reloadURL)');
+	  }
           menu.clearbut(7,1);
           menu.clearbut(7,2);
           menu.clearbut(7,3);
@@ -415,6 +479,7 @@ ENDREGTHIS
 
     function LONCAPAreg() {
 	  menu=window.open("$nothing","LONCAPAmenu","",false);
+          $timesync
           menu.currentStale=1;
           menu.clearbut(2,1);
           menu.clearbut(2,3);
@@ -436,61 +501,6 @@ ENDREGTHIS
 </script>
 ENDDONOTREGTHIS
     }
-    if ($target eq 'edit') {
-	# Javascript routines for construction space:
-	# openbrowser and opensearcher will start the file browser
-	# (lonindexer) and searcher (lonsearchcat) respectively.
-	# Inputs are the name of the html form being used
-	# and the name of the element the selected URL should
-	# be placed in.
-        # openbrowser also takes arguments only and omit, which are
-        # comma deliminated lists of file extensions to (only) show 
-        # or omit.
-        # Here we also set currentURL=null.
-        $result .=<<"ENDBROWSERSCRIPT";
-<script>
-    menu.currentURL=null;
-    var editbrowser;
-    function openbrowser(formname,elementname,only,omit) {
-        var url = '/res/?';
-        if (editbrowser == null) {
-            url += 'launch=1&';
-        }
-        url += 'catalogmode=interactive&';
-        url += 'mode=edit&';
-        url += 'form=' + formname + '&';
-        if (only != null) {
-            url += 'only=' + only + '&';
-        } 
-        if (omit != null) {
-            url += 'omit=' + omit + '&';
-        }
-        url += 'element=' + elementname + '';
-        var title = 'Browser';
-        var options = 'scrollbars=1,resizable=1,menubar=0';
-        options += ',width=700,height=600';
-        editbrowser = open(url,title,options,'1');
-        editbrowser.focus();
-    }
-    var editsearcher;
-    function opensearcher(formname,elementname) {
-        var url = '/adm/searchcat?';
-        if (editsearcher == null) {
-            url += 'launch=1&';
-        }
-        url += 'catalogmode=interactive&';
-        url += 'mode=edit&';
-        url += 'form=' + formname + '&';
-        url += 'element=' + elementname + '';
-        var title = 'Search';
-        var options = 'scrollbars=1,resizable=1,menubar=0';
-        options += ',width=700,height=600';
-        editsearcher = open(url,title,options,'1');
-        editsearcher.focus();
-    }
-</script>
-ENDBROWSERSCRIPT
-    }
     return $result;
 }
 
@@ -511,9 +521,26 @@ sub printalltags {
 }
 
 sub xmlparse {
- my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
+ my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
+
+ &setup_globals($request,$target);
+#
+# do we have a course style file?
+#
+
+ if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
+     my $bodytext=
+	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
+     if ($bodytext) {
+       my $location=&Apache::lonnet::filelocation('',$bodytext);
+       my $styletext=&Apache::lonnet::getfile($location);
+       if ($styletext ne '-1') {
+          %style_for_target = (%style_for_target,
+                          &Apache::style::styleparser($target,$styletext));
+       }
+    }
+ }
 
- &setup_globals($target);
  #&printalltags();
  my @pars = ();
  my $pwd=$ENV{'request.filename'};
@@ -536,6 +563,7 @@ sub xmlparse {
  if ($ENV{'request.uri'}) {
     &writeallows($ENV{'request.uri'});
  }
+ if ($Apache::lonxml::counter_changed) { &store_counter() }
  return $finaloutput;
 }
 
@@ -560,6 +588,22 @@ sub htmlclean {
     return $output;
 }
 
+sub latex_special_symbols {
+    my ($current_token,$stack,$parstack)=@_;
+    $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
+    return $current_token;
+}
+
 sub inner_xmlparse {
   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
   my $finaloutput = '';
@@ -569,7 +613,12 @@ sub inner_xmlparse {
     while ($token = $$pars['-1']->get_token) {
       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
 	if ($metamode<1) {
-	  $result=$token->[1];
+	    my $text=$token->[1];
+	    if ($token->[0] eq 'C' && $target eq 'tex') {
+		$text = '%'.$text;
+		$text =~ s/[\n\r]//g;
+	    }
+	    $result.=$text;
 	}
       } elsif ($token->[0] eq 'PI') {
 	if ($metamode<1) {
@@ -632,6 +681,12 @@ sub inner_xmlparse {
 	  $result= &Apache::run::evaluate($result,$safeeval,'');
 	}
       }
+      if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
+	if ($target eq 'tex') {
+	    $result=&latex_special_symbols($result,$stack,$parstack);
+	}
+      }
+
       # Encode any high ASCII characters
       if (!$Apache::lonxml::prevent_entity_encode) {
 	$result=&HTML::Entities::encode($result,"\200-\377");
@@ -758,13 +813,13 @@ sub callsub {
     }
     if (!$deleted) {
       if ($space) {
-	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
+	&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
 	$sub1="$space\:\:$sub";
 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
 					     $parstack,$parser,$safeeval,
 					     $style);
       } else {
-	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
+	&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
 	if ($metamode <1) {
 	  if (defined($token->[4]) && ($metamode < 1)) {
 	    $currentstring = $token->[4];
@@ -786,6 +841,9 @@ sub callsub {
 	  if ($token->[0] eq 'S') {
 	    $currentstring = $token->[4];
 	    $currentstring.=&Apache::edit::handle_insert();
+	  } elsif ($token->[0] eq 'E') {
+	    $currentstring = $token->[2];
+            $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
 	  } else {
 	    $currentstring = $token->[2];
 	  }
@@ -798,8 +856,13 @@ sub callsub {
 }
 
 sub setup_globals {
-  my ($target)=@_;
+  my ($request,$target)=@_;
+  $Apache::lonxml::request=$request;
   $Apache::lonxml::registered = 0;
+  $errorcount=0;
+  $warningcount=0;
+  $Apache::lonxml::default_homework_loaded=0;
+  &init_counter();
   @Apache::lonxml::pwd=();
   @Apache::lonxml::extlinks=();
   if ($target eq 'meta') {
@@ -900,6 +963,18 @@ sub init_safespace {
   &Apache::run::run($safeinit,$safeeval);
 }
 
+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) {
+	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
+    } else {
+	&Apache::run::run($default,$safeeval);
+	$Apache::lonxml::default_homework_loaded=1;
+    }
+}
+
 sub startredirection {
   $Apache::lonxml::redirection++;
   push (@Apache::lonxml::outputstack, '');
@@ -955,8 +1030,55 @@ sub decreasedepth {
 #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
 }
 
-sub get_all_text {
+sub get_all_text_unbalanced {
+#there is a copy of this in lonpublisher.pm
+ my($tag,$pars)= @_;
+ my $token;
+ my $result='';
+ $tag='<'.$tag.'>';
+ while ($token = $$pars[-1]->get_token) {
+   if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
+     $result.=$token->[1];
+   } elsif ($token->[0] eq 'PI') {
+     $result.=$token->[2];
+   } elsif ($token->[0] eq 'S') {
+     $result.=$token->[4];
+   } elsif ($token->[0] eq 'E')  {
+     $result.=$token->[2];
+   }
+   if ($result =~ /(.*)\Q$tag\E(.*)/s) {
+     &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
+     &Apache::lonxml::debug('Result is :'.$1);
+     $result=$1;
+     my $redo=$tag.$2;
+     &Apache::lonxml::newparser($pars,\$redo);
+     last;
+   }
+ }
+ return $result
+}
+
+sub increment_counter {
+    $Apache::lonxml::counter++;
+    $Apache::lonxml::counter_changed=1;
+}
 
+sub init_counter {
+    if (defined($ENV{'form.counter'})) {
+	$Apache::lonxml::counter=$ENV{'form.counter'};
+    } elsif (not defined($Apache::lonxml::counter)) {
+	$Apache::lonxml::counter=1;
+	&store_counter();
+    }
+    $Apache::lonxml::counter_changed=0;
+}
+
+sub store_counter {
+    &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
+    return '';
+}
+
+sub get_all_text {
  my($tag,$pars)= @_;
  my $depth=0;
  my $token;
@@ -1219,7 +1341,8 @@ ENDNOTFOUND
       }
     }
     if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
-      $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
+      $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
+					  '',%mystyle);
     }
   }
 
@@ -1228,7 +1351,10 @@ ENDNOTFOUND
 #
   unless ($ENV{'request.state'} eq 'published') {
     if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
-      $result='<html><body bgcolor="#FFFFFF"></body></html>';
+	my $displayfile=$request->uri;
+        $displayfile=~s/^\/[^\/]*//;
+      $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
+              '</h3></body></html>';
       $result=&inserteditinfo($result,$filecontents);
     }
   }
@@ -1243,11 +1369,12 @@ ENDNOTFOUND
 sub debug {
   if ($Apache::lonxml::debug eq 1) {
     $|=1;
-    print("DEBUG:".join('<br />',@_)."<br />\n");
+    print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
   }
 }
 
 sub error {
+  $errorcount++;
   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
     # If printing in construction space, put the error inside <pre></pre>
     print "<b>ERROR:</b>".join("\n",@_)."\n";
@@ -1257,10 +1384,10 @@ sub error {
     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
     #notify course
     if ( $ENV{'request.course.id'} ) {
-      my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
+      my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
-      foreach my $user (split /\,/, $users) {
-	($user,my $domain) = split /:/, $user;
+      foreach (keys %users) {
+	my ($user,$domain) = split(/:/, $_);
 	&Apache::lonmsg::user_normal_msg($user,$domain,
         "Error [$declutter]",join('<br />',@_));
       }
@@ -1273,6 +1400,7 @@ sub error {
 }
 
 sub warning {
+  $warningcount++;
   if ($ENV{'request.state'} eq 'construct') {
     print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
   }