--- rat/lonpage.pm	2000/08/30 11:10:23	1.1
+++ rat/lonpage.pm	2000/09/15 20:03:48	1.5
@@ -4,7 +4,7 @@
 # (TeX Content Handler
 #
 # 05/29/00,05/30 Gerd Kortemeyer)
-# 08/30 Gerd Kortemeyer
+# 08/30,08/31,09/06,09/14,09/15 Gerd Kortemeyer
 
 package Apache::lonpage;
 
@@ -13,28 +13,102 @@ use Apache::Constants qw(:common :http);
 use Apache::lonnet();
 use GDBM_File;
 
+# -------------------------------------------------------------- Module Globals
+my %hash;
+my @rows;
+                  
+my %ssibody=();
+my %ssibgcolor=();
+my %ssitext=();
+my %ssilink=();
+my %ssivlink=();
+my %ssialink=();
+my %cellemb=();
+
+# ------------------------------------------------------------ Build page table
+
+sub tracetable {
+    my ($sofar,$rid,$beenhere)=@_;
+    my $further=$sofar;
+    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})) {
+          map {
+              my $now=&tracetable($sofar,$hash{'goesto_'.$_},$beenhere);
+              if ($now>$further) { $further=$now; }
+          } split(/\,/,$hash{'to_'.$rid});
+       }
+    }
+    return $further;
+}
+
+sub cell {
+    my ($r,$colspan,$rid)=@_;
+    $r->print('<td colspan="'.$colspan.'"');
+    if ($cellemb{$rid} eq 'ssi') {
+       $r->print('>'.$ssibody{$rid});
+    } elsif ($cellemb{$rid} eq 'img') {
+       $r->print('><img src="'.$hash{'src_'.$rid}.'">');
+    }
+    $r->print('</td>');
+}
+
 # ================================================================ 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
   if ($ENV{'request.course.fn'}) {
       my $fn=$ENV{'request.course.fn'};
       if (-e "$fn.db") {
-          my %hash;
           if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT,0640)) {
 # ------------------------------------------------------------------- Hash tied
               my $firstres=$hash{'map_start_'.$requrl};
@@ -42,11 +116,87 @@ sub handler {
               if (($firstres) && ($lastres)) {
 # ----------------------------------------------------------------- Render page
 
-		  $r->print("<h2>All is cool.</h2>");
+                  @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;
+		     }
+		  }
+
+                  my $i;
+                  my $j;
+                  my $maxcols=-1;
+
+# --------------------------------------------- Get SSI output, post parameters
+
+                  for ($i=0;$i<=$#rows;$i++) {
+		     if ($rows[$i]) {
+                      my @colcont=split(/\&/,$rows[$i]);
+                      $maxcols=$#colcont>$maxcols?$#colcont:$maxcols;
+                      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);
+
+			      $ssibody{$_}=$output;
+
+# ---------------------------------------------------------------- End SSI cell
+                          }
+                      } @colcont;
+                     } 
+                  }
+                  if ($maxcols<0) {
+                      $r->content_type('text/html');
+                      $r->send_http_header;
+                      $r->print('<html><body>Empty page.</body></html>');
+                  } else {
+# ------------------------------------------------------------------ Build page
+                      $maxcols++;
+                      $r->content_type('text/html');
+                      $r->send_http_header;
+                      $r->print('<html><body>');
+ 
+                      $r->print('<table cols="'.$maxcols.'" rows="'.
+                                 $#rows.'" border="0">');
+                      for ($i=0;$i<=$#rows;$i++) {
+			if ($rows[$i]) {
+                          $r->print("\n<tr>");
+                          my @colcont=split(/\&/,$rows[$i]);
+                          my $avespan=int($maxcols/($#colcont+1));
+                          my $lastspan=$maxcols-$avespan*$#colcont;
+                          for ($j=0;$j<$#colcont;$j++) {
+                              &cell($r,$avespan,$colcont[$j]);
+                          }
+                          &cell($r,$lastspan,$colcont[$#colcont]);
+                          $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)) {