--- rat/lonpage.pm	2002/03/26 23:12:57	1.35
+++ rat/lonpage.pm	2004/08/29 18:34:36	1.57
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Page Handler
 #
-# $Id: lonpage.pm,v 1.35 2002/03/26 23:12:57 www Exp $
+# $Id: lonpage.pm,v 1.57 2004/08/29 18:34:36 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -33,7 +33,6 @@
 # 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16,
 # YEAR=2001
 # 08/13/01,08/30,10/1 Gerd Kortemeyer
-# 12/16 Scott Harrison
 # YEAR=2002
 # 03/19 Gerd Kortemeyer
 #
@@ -46,8 +45,11 @@ use Apache::Constants qw(:common :http);
 use Apache::lonnet();
 use Apache::loncommon();
 use Apache::lonxml();
+use Apache::lonlocal;
+use Apache::lonmenu;
 use HTML::TokeParser;
 use GDBM_File;
+use Apache::lonsequence;
 
 # -------------------------------------------------------------- Module Globals
 my %hash;
@@ -71,66 +73,70 @@ sub euclid {
 sub tracetable {
     my ($sofar,$rid,$beenhere)=@_;
     my $further=$sofar;
+    my $randomout=0;
+    if ($ENV{'request.role'} =~ /^st/) {
+        $randomout = $hash{'randomout_'.$rid};
+    }
     unless ($beenhere=~/\&$rid\&/) {
-       $beenhere.=$rid.'&';  
-
-       if (defined($hash{'is_map_'.$rid})) {
-           if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
-               (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
-              my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
-	      $sofar=
-                &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
-                '&'.$frid.'&');
-              $sofar++;
-              if ($hash{'src_'.$frid}) {
-               my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
-               if (($brepriv eq '2') || ($brepriv eq 'F')) {
-                 if (defined($rows[$sofar])) {
-                   $rows[$sofar].='&'.$frid;
-                 } else {
-                   $rows[$sofar]=$frid;
-                 }
-	       }
-	      }
-	   }
-       } else {
-          $sofar++;
-          if ($hash{'src_'.$rid}) {
-           my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
-           if (($brepriv eq '2') || ($brepriv eq 'F')) {
-             if (defined($rows[$sofar])) {
-               $rows[$sofar].='&'.$rid;
-             } else {
-               $rows[$sofar]=$rid;
-             }
-	   }
-          }
-       }
-
-       if (defined($hash{'to_'.$rid})) {
-	  my $mincond=1;
-          my $next='';
-          foreach (split(/\,/,$hash{'to_'.$rid})) {
-              my $thiscond=
+        $beenhere.=$rid.'&';
+        unless ($randomout) {
+            if (defined($hash{'is_map_'.$rid})) {
+                if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
+                    (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
+                    my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
+	            $sofar=
+                       &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
+                       '&'.$frid.'&');
+                    $sofar++;
+                    if ($hash{'src_'.$frid}) {
+                        my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
+                        if (($brepriv eq '2') || ($brepriv eq 'F')) {
+                            if (defined($rows[$sofar])) {
+                                $rows[$sofar].='&'.$frid;
+                            } else {
+                                $rows[$sofar]=$frid;
+                            }
+	                }
+	            }
+	        }
+            } else {
+                $sofar++;
+                if ($hash{'src_'.$rid}) {
+                    my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
+                    if (($brepriv eq '2') || ($brepriv eq 'F')) {
+                        if (defined($rows[$sofar])) {
+                            $rows[$sofar].='&'.$rid;
+                        } else {
+                            $rows[$sofar]=$rid;
+                        }
+	            }
+                }
+            }
+        }
+
+        if (defined($hash{'to_'.$rid})) {
+	    my $mincond=1;
+            my $next='';
+            foreach (split(/\,/,$hash{'to_'.$rid})) {
+                my $thiscond=
       &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
-              if ($thiscond>=$mincond) {
-		  if ($next) {
-		      $next.=','.$_.':'.$thiscond;
-                  } else {
-                      $next=$_.':'.$thiscond;
-		  }
-                  if ($thiscond>$mincond) { $mincond=$thiscond; }
-	      }
-          }
-          foreach (split(/\,/,$next)) {
-              my ($linkid,$condval)=split(/\:/,$_);
-              if ($condval>=$mincond) {
-                my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
-                if ($now>$further) { $further=$now; }
-	      }
-          }
-
-       }
+                if ($thiscond>=$mincond) {
+		    if ($next) {
+		        $next.=','.$_.':'.$thiscond;
+                    } else {
+                        $next=$_.':'.$thiscond;
+		    }
+                    if ($thiscond>$mincond) { $mincond=$thiscond; }
+	        }
+            }
+            foreach (split(/\,/,$next)) {
+                my ($linkid,$condval)=split(/\:/,$_);
+                if ($condval>=$mincond) {
+                    my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
+                    if ($now>$further) { $further=$now; }
+	        }
+            }
+        }
     }
     return $further;
 }
@@ -144,20 +150,30 @@ sub handler {
 
   if ($r->header_only) {
        if ($ENV{'browser.mathml'}) {
-           $r->content_type('text/xml');
+           &Apache::loncommon::content_type($r,'text/xml');
        } else {
-           $r->content_type('text/html');
+           &Apache::loncommon::content_type($r,'text/html'); 
        }
        $r->send_http_header;
        return OK;
    }
-
-  my $requrl=$r->uri;
+  
+   &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+                                          ['forceselect','launch']);
+  my $number_of_columns = 1;
+  my $requrl=$r->uri;  
+  my $target = $ENV{'form.grade_target'};
+#  &Apache::lonnet::logthis("Got a target of $target");
+  if ($target eq 'meta') {
+      &Apache::loncommon::content_type($r,'text/html');
+      $r->send_http_header;
+      return OK;
+  }
 # ----------------------------------------------------------------- Tie db file
-  if ($ENV{'request.course.fn'}) {
+  if (($ENV{'request.course.fn'}) && (!$ENV{'form.forceselect'})) {
       my $fn=$ENV{'request.course.fn'};
       if (-e "$fn.db") {
-          if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) {
+          if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
 # ------------------------------------------------------------------- Hash tied
               my $firstres=$hash{'map_start_'.$requrl};
               my $lastres=$hash{'map_finish_'.$requrl};
@@ -166,14 +182,7 @@ sub handler {
 
                   @rows=();
 
-                  &tracetable(0,$firstres,'&'.$lastres.'&');
-                  if ($hash{'src_'.$lastres}) {
-                     my $brepriv=
-                        &Apache::lonnet::allowed('bre',$hash{'src_'.$lastres});
-                     if (($brepriv eq '2') || ($brepriv eq 'F')) {
-                        $rows[$#rows+1]=''.$lastres;
-		     }
-		  }
+                  &tracetable(0,$firstres,'&');
 
 # ------------------------------------------------------------ Add to symb list
 
@@ -230,6 +239,13 @@ sub handler {
 # --------------------------------------------------------- This is an SSI cell
 			      my $prefix=$_.'_';
                               my %posthash=('request.prefix' => $prefix);
+			      if ($ENV{'form.grade_target'} eq 'tex') {
+				  $posthash{'grade_target'}=$ENV{'form.grade_target'};
+				  $posthash{'textwidth'}=$ENV{'form.textwidth'};
+				  $posthash{'problem_split'}=$ENV{'form.problem_split'};
+				  $posthash{'latex_type'}=$ENV{'form.latex_type'};
+				  $posthash{'rndseed'}=$ENV{'form.rndseed'};
+			      }
                               if (($ENV{'form.'.$prefix.'submit'}) 
                                || ($ENV{'form.all_submit'})) {
                                foreach (keys %ENV) {
@@ -241,6 +257,15 @@ sub handler {
                                }
 			      }
                               my $output=Apache::lonnet::ssi($src,%posthash);
+			      $output=~
+	    s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
+                              if ($target eq 'tex') {
+				  $output =~ s/^([^&]+)\\begin{document}//;
+				  $output =~ s/\\end{document}//;
+				  $output = '\parbox{\minipagewidth}{ '.$output.' }';
+                                  #some additional cleanup necessary for LateX (due to limitations of table environment 
+				  $output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
+			      }
                               my $parser=HTML::TokeParser->new(\$output);
                               my $token;
                               my $thisdir=$src;
@@ -324,55 +349,74 @@ sub handler {
                      } 
                   }
                   unless ($contents) {
-                      $r->content_type('text/html');
+                      &Apache::loncommon::content_type($r,'text/html');
                       $r->send_http_header;
-                      $r->print('<html><body>Empty page.</body></html>');
+                      $r->print('<html><body>'.&mt('Empty page').'.</body></html>');
                   } else {
 # ------------------------------------------------------------------ Build page
 
 # ---------------------------------------------------------------- Send headers
-                      if ($isxml) {
-			  $r->content_type('text/xml');
-                          $r->send_http_header;
-                          $r->print($xmlheader);
-		      } else {
-                          $r->content_type('text/html');
-                          $r->send_http_header;
-                          $r->print('<html>');
-		      }
+		      unless ($target eq 'tex') {
+			  if ($isxml) {
+			      &Apache::loncommon::content_type($r,'text/xml');
+			      $r->send_http_header;
+			      $r->print($xmlheader);
+			  } else {
+			      &Apache::loncommon::content_type($r,'text/html');
+			      $r->send_http_header;
+			      $r->print('<html>');
+			  }
 # ------------------------------------------------------------------------ Head
-                      $r->print("\n<head>\n".$allmeta);
-                      $allscript=~
-       s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
-                      if ($allscript) {
-			  $r->print("\n<script language='JavaScript'>\n".
-                                   $allscript."\n</script>\n");
-                      }
-                      $r->print(&Apache::lonxml::registerurl(1,undef));
-                      $r->print("\n</head>\n");
+			  $r->print("\n<head>\n".$allmeta);
+			  if ($allscript) {
+			      $r->print("\n<script language='JavaScript'>\n".
+					$allscript."\n</script>\n");
+			  }
+			  $r->print(&Apache::lonmenu::registerurl(1,undef));
+			  $r->print("\n</head>\n");
 # ------------------------------------------------------------------ Start body
-                      if ($isxml) {
-                          $r->print($xmlbody);
-                      } else {
-			  $r->print(
- '<body bgcolor="#FFFFFF" onLoad="'.&Apache::lonxml::loadevents.
-                     '" onUnload="'.&Apache::lonxml::unloadevents.'">');
-                      }
+			  if ($isxml) {
+			      $r->print($xmlbody);
+			  } else {
+			      $r->print(
+               '<body bgcolor="#FFFFFF" onLoad="'.&Apache::lonmenu::loadevents.
+               '" onUnload="'.&Apache::lonmenu::unloadevents.'">'.
+                              &Apache::lonmenu::menubuttons(undef,$target,1)
+					);
+			  }
 # ------------------------------------------------------------------ Start form
-                      if ($nforms) {
-			  $r->print('<form method="post" action="'.
-				    $requrl.'">');
-                      }
+			  if ($nforms) {
+			      $r->print('<form method="post" action="'.
+					$requrl.'">');
+			  }
+		      } elsif ($target eq 'tex') {
+			  $r->print('\documentclass{article}
+                                 \newcommand{\keephidden}[1]{}           
+                                 \usepackage[dvips]{graphicx}
+                                 \usepackage{epsfig}
+                                 \usepackage{calc}
+                                 \usepackage{longtable}
+                                 \begin{document}');
+		      }
 # ----------------------------------------------------------------- Start table
-                      $r->print('<table cols="'.$lcm.'" border="0">');
+		      if ($target eq 'tex') {
+			  $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
+			  if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
+		      } else {
+			  $r->print('<table cols="'.$lcm.'" border="0">');
+		      }
                       for ($i=0;$i<=$#rows;$i++) {
 			if ($rows[$i]) {
-                          $r->print("\n<tr>");
+			    unless ($target eq 'tex') {
+				$r->print("\n<tr>");
+			    }
                           my @colcont=split(/\&/,$rows[$i]);
                           my $avespan=$lcm/($#colcont+1);
                           for ($j=0;$j<=$#colcont;$j++) {
                               my $rid=$colcont[$j];
-                              my $metainfo='<a href="'.
+                              my $metainfo='<a name="'.
+				  &Apache::lonnet::escape(&Apache::lonnet::declutter($hash{'src_'.$rid})).'" />'.
+				  '<a href="'.
                                     $metalink{$rid}.'" target="LONcatInfo">'.
                           '<img src="/adm/lonMisc/cat_button.gif" border=0>'.
 			  '</img></a><a href="/adm/evaluate?postdata='.
@@ -389,67 +433,106 @@ sub handler {
                 '___'.$resid.'___'.
 		&Apache::lonnet::declutter($hash{'src_'.$rid});
                                  $metainfo.=
-                  '<a href="/adm/grades?symb='.$symb.
-                  '&command=submission" target="LONcatInfo">'.
+                  '<a href="/adm/grades?symb='.&Apache::lonnet::escape($symb).
+#                 '&command=submission" target="LONcatInfo">'.
+                  '&command=submission">'.
                           '<img src="/adm/lonMisc/subm_button.gif" border=0>'.
 			  '</img></a>'.
-                  '<a href="/adm/grades?symb='.$symb.
-                  '&command=viewgrades" target="LONcatInfo">'.
+                  '<a href="/adm/grades?symb='.&Apache::lonnet::escape($symb).
+#                  '&command=gradingmenu" target="LONcatInfo">'.
+                  '&command=gradingmenu">'.
                           '<img src="/adm/lonMisc/pgrd_button.gif" border=0>'.
 			  '</img></a>'.
-                  '<a href="/adm/parmset?symb='.$symb.'" target="LONcatInfo">'.
+                  '<a href="/adm/parmset?symb='.&Apache::lonnet::escape($symb).
+#                          '" target="LONcatInfo">'.
+                          '" >'.
                           '<img src="/adm/lonMisc/pprm_button.gif" border=0>'.
 			      '</img></a>';
                               }
                               $metainfo.='<br></br>';
-                              $r->print('<td colspan="'.$avespan.'"');
+			    unless ($target eq 'tex') {
+				$r->print('<td colspan="'.$avespan.'"');
+			    }
                               if ($cellemb{$rid} eq 'ssi') {
-				  if ($ssibgcolor{$rid}) {
-                                     $r->print(' bgcolor="'.
-                                               $ssibgcolor{$rid}.'"');
-                                  }
-                                  $r->print('>'.$metainfo.'<font');
-                                  if ($ssitext{$rid}) {
-				     $r->print(' text="'.$ssitext{$rid}.'"');
-                                  }
-                                  if ($ssilink{$rid}) {
-				     $r->print(' link="'.$ssilink{$rid}.'"');
-                                  }
-                                  if ($ssitext{$rid}) {
-				     $r->print(' vlink="'.$ssivlink{$rid}.'"');
-                                  }
-                                  if ($ssialink{$rid}) {
-				     $r->print(' alink="'.$ssialink{$rid}.'"');
+				  unless ($target eq 'tex') {
+				      if ($ssibgcolor{$rid}) {
+					  $r->print(' bgcolor="'.
+						    $ssibgcolor{$rid}.'"');
+				      }
+				      $r->print('>'.$metainfo.'<font');
+		    
+				      if ($ssitext{$rid}) {
+					  $r->print(' text="'.$ssitext{$rid}.'"');
+				      }
+				      if ($ssilink{$rid}) {
+					  $r->print(' link="'.$ssilink{$rid}.'"');
+				      }
+				      if ($ssitext{$rid}) {
+					  $r->print(' vlink="'.$ssivlink{$rid}.'"');
+				      }
+				      if ($ssialink{$rid}) {
+					  $r->print(' alink="'.$ssialink{$rid}.'"');
+				      }             
+				      $r->print('>');
+				  }
+                                  $r->print($ssibody{$rid});	
+				  unless ($target eq 'tex') {
+				      $r->print('</font>');
                                   }
-                            
-                                  $r->print('>'.$ssibody{$rid}.'</font>');
-                              } elsif ($cellemb{$rid} eq 'img') {
+                                  if ($ENV{'course.'.
+                                      $ENV{'request.course.id'}.
+                                      '.pageseparators'} eq 'yes') {
+                                      unless($target eq 'tex') {
+                                          $r->print('<hr />');
+                                      } else {
+                                          $r->print('\hline');
+                                      }
+				  }
+			      } elsif ($cellemb{$rid} eq 'img') {
                                   $r->print('>'.$metainfo.'<img src="'.
                                     $hash{'src_'.$rid}.'"></img>');
 			      } elsif ($cellemb{$rid} eq 'emb') {
                                   $r->print('>'.$metainfo.'<embed src="'.
                                     $hash{'src_'.$rid}.'"></embed>');
                               }
-                              $r->print('</td>');
+			      unless ($target eq 'tex') {
+				  $r->print('</td>');
+			      } else {
+                                  for (my $incol=1;$incol<=$avespan;$incol++) {
+				      $r->print(' & ');
+				  }
+			      }
                           }
-                          $r->print('</tr>');
+			      unless ($target eq 'tex') {
+				  $r->print('</tr>');
+			      } else {
+				  $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
+			      }
 		        }
                       }
-                      $r->print("\n</table>");
+		      unless ($target eq 'tex') {
+			  $r->print("\n</table>");
+		      } else {
+			  $r->print('\end{longtable}\strut');
+		      }
 # ---------------------------------------------------------------- Submit, etc.
                       if ($nforms) {
                           $r->print(
 	                  '<input name="all_submit" value="Submit All" type="'.
 			  (($nforms>1)?'submit':'hidden').'"></input></form>');
                       }
-                      $r->print('</body>'.&Apache::lonxml::xmlend());
+		      unless ($target eq 'tex') {
+			  $r->print('</body>'.&Apache::lonxml::xmlend());
+		      } else {
+			  $r->print('\end{document}'.$number_of_columns);
+		      }
 # -------------------------------------------------------------------- End page
                   }                  
 # ------------------------------------------------------------- End render page
               } else {
                   $r->content_type('text/html');
                   $r->send_http_header;
-		  $r->print('<html><body>Page undefined.</body></html>');
+                  &Apache::lonsequence::viewmap($r,$requrl);
               }
 # ------------------------------------------------------------------ Untie hash
               unless (untie(%hash)) {
@@ -462,8 +545,10 @@ sub handler {
           }
       } 
   }
-  $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
-  return HTTP_NOT_ACCEPTABLE; 
+  $r->content_type('text/html');
+  $r->send_http_header;
+  &Apache::lonsequence::viewmap($r,$requrl);
+  return OK; 
 }
 
 1;
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at 
 root@localhost to inform them of the time this error occurred,
 and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
</body></html>