--- rat/lonpage.pm	2000/08/31 10:14:08	1.2
+++ rat/lonpage.pm	2000/09/16 17:42:01	1.6
@@ -4,19 +4,33 @@
 # (TeX Content Handler
 #
 # 05/29/00,05/30 Gerd Kortemeyer)
-# 08/30,08/31 Gerd Kortemeyer
+# 08/30,08/31,09/06,09/14,09/15,09/16 Gerd Kortemeyer
 
 package Apache::lonpage;
 
 use strict;
 use Apache::Constants qw(:common :http);
 use Apache::lonnet();
+use HTML::TokeParser;
 use GDBM_File;
 
 # -------------------------------------------------------------- Module Globals
 my %hash;
 my @rows;
 
+# ------------------------------------------------------------------ Euclid gcd
+
+sub euclid {
+    my ($e,$f)=@_;
+    my $a; my $b; my $r;
+    if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
+    while ($r!=0) {
+	$a=$b; $b=$r;
+        $r=$a%$b;
+    }
+    return $b;
+}
+
 # ------------------------------------------------------------ Build page table
 
 sub tracetable {
@@ -28,23 +42,34 @@ sub tracetable {
        if (defined($hash{'is_map_'.$rid})) {
            if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
                (defined($hash{'map_finish_'.$hash{'src_'.$rid}}))) {
-	       $sofar=
+              my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
+	      $sofar=
                 &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
-                '&'.$hash{'map_finish_'.$hash{'src_'.$rid}}.'&');
-               $sofar++;
-               if (defined($rows[$sofar])) {
-                   $rows[$sofar].='&'.$hash{'map_finish_'.$hash{'src_'.$rid}};
-               } else {
-                   $rows[$sofar]=$hash{'map_finish_'.$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 {
-           $sofar++;
-           if (defined($rows[$sofar])) {
+          $sofar++;
+          if ($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 {
+             } else {
                $rows[$sofar]=$rid;
-           }
+             }
+	   }
+          }
        }
 
        if (defined($hash{'to_'.$rid})) {
@@ -57,22 +82,22 @@ sub tracetable {
     return $further;
 }
 
-
 # ================================================================ Main Handler
 
 sub handler {
   my $r=shift;
 
-# ----------------------------------------------------------- Set document type
-
-  if ($ENV{'browser.mathml'}) {
-    $r->content_type('text/xml');
-  } else {
-    $r->content_type('text/html');
-  }
-  $r->send_http_header;
+# ------------------------------------------- Set document type for header only
 
-  return OK if $r->header_only;
+  if ($r->header_only) {
+       if ($ENV{'browser.mathml'}) {
+           $r->content_type('text/xml');
+       } else {
+           $r->content_type('text/html');
+       }
+       $r->send_http_header;
+       return OK;
+   }
 
   my $requrl=$r->uri;
 # ----------------------------------------------------------------- Tie db file
@@ -86,20 +111,119 @@ sub handler {
               if (($firstres) && ($lastres)) {
 # ----------------------------------------------------------------- Render page
 
-		  $r->print("<h2>All is cool.</h2>");
-
                   @rows=();
+
                   &tracetable(0,$firstres,'&'.$lastres.'&');
-                  $rows[$#rows+1]=''.$lastres;
+                  if ($hash{'src_'.$lastres}) {
+                     my $brepriv=
+                        &Apache::lonnet::allowed('bre',$hash{'src_'.$lastres});
+                     if (($brepriv eq '2') || ($brepriv eq 'F')) {
+                        $rows[$#rows+1]=''.$lastres;
+		     }
+		  }
 
                   my $i;
+                  my $j;
+                  my $lcm=1;
+                  my $contents=0;
+                  
+                  my %ssibody=();
+                  my %ssibgcolor=();
+                  my %ssitext=();
+                  my %ssilink=();
+                  my %ssivlink=();
+                  my %ssialink=();
+                  my %cellemb=();
+
+# --------------------------------------------- Get SSI output, post parameters
+
                   for ($i=0;$i<=$#rows;$i++) {
-                      $r->print($i.' - '.$rows[$i].'<br>');
+		     if ($rows[$i]) {
+		      $contents++;
+                      my @colcont=split(/\&/,$rows[$i]);
+                      $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
+                      map {
+                          my $src=$hash{'src_'.$_};
+                          $src=~/\.(\w+)$/;
+                          $cellemb{$_}=Apache::lonnet::fileembstyle($1);
+                          if ($cellemb{$_} eq 'ssi') {
+# --------------------------------------------------------- This is an SSI cell
+			      my $prefix=$_.'_';
+                              my %posthash=('request.prefix' => $prefix);
+                              map {
+				  if ($_=~/^form.$prefix/) {
+				      my $name=$_;
+                                      $name=~s/^form.$prefix//;
+                                      $posthash{$name}=$ENV{$_};
+                                  }
+                              } keys %ENV;
+                              my $output=Apache::lonnet::ssi($src,%posthash);
+                              my $parser=HTML::TokeParser->new(\$output);
+                              my $token;
+                              my $bodydef=0;
+                              while (($bodydef==0) &&
+                                     ($token=$parser->get_token)) {
+				  if ($token->[1] eq 'body') {
+                                     $bodydef=1
+                                  }
+                                  if ($token->[1] eq 'meta') {
+                                  }
+                                  if ($token->[1] eq 'script') {
+                                  }
+                                  if ($token->[1] eq 'basefont') {
+                                  }
+                              }
+                              if ($output=~/\<body[^\>]*\>(.*)/si) {
+                                 $output=$1; 
+                              }
+                              $output=~s/\<\/body\>.*//si;
+			      $ssibody{$_}=$output;
+
+# ---------------------------------------------------------------- End SSI cell
+                          }
+                      } @colcont;
+                     } 
                   }
-
+                  unless ($contents) {
+                      $r->content_type('text/html');
+                      $r->send_http_header;
+                      $r->print('<html><body>Empty page.</body></html>');
+                  } else {
+# ------------------------------------------------------------------ Build page
+                      $r->content_type('text/html');
+                      $r->send_http_header;
+                      $r->print('<html><body>');
+ 
+                      $r->print('<table cols="'.$lcm.'" border="1">');
+                      for ($i=0;$i<=$#rows;$i++) {
+			if ($rows[$i]) {
+                          $r->print("\n<tr>");
+                          my @colcont=split(/\&/,$rows[$i]);
+                          my $avespan=$lcm/($#colcont+1);
+                          for ($j=0;$j<=$#colcont;$j++) {
+                              my $rid=$colcont[$j];
+                              $r->print('<td colspan="'.$avespan.'"');
+                              if ($cellemb{$rid} eq 'ssi') {
+                                 $r->print('>'.$ssibody{$rid});
+                              } elsif ($cellemb{$rid} eq 'img') {
+                                 $r->print('><img src="'.
+                                    $hash{'src_'.$rid}.'">');
+			      }
+                              $r->print('</td>');
+                          }
+                          $r->print('</tr>');
+		        }
+                      }
+                      $r->print("\n</table>");
+
+                      $r->print('</body></html>');
+# -------------------------------------------------------------------- End page
+                  }                  
 # ------------------------------------------------------------- End render page
               } else {
-		  $r->print("<h2>Page undefined.</h2>");
+                  $r->content_type('text/html');
+                  $r->send_http_header;
+		  $r->print('<html><body>Page undefined.</body></html>');
               }
 # ------------------------------------------------------------------ Untie hash
               unless (untie(%hash)) {