--- loncom/interface/loncommon.pm	2008/01/06 04:38:57	1.633
+++ loncom/interface/loncommon.pm	2008/04/04 16:48:42	1.636.2.6
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.633 2008/01/06 04:38:57 raeburn Exp $
+# $Id: loncommon.pm,v 1.636.2.6 2008/04/04 16:48:42 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -78,6 +78,75 @@ my $readit;
 ## Global Variables
 ##
 
+# ----------------------------------------------- SSI with retries:
+#
+
+=pod
+
+=head1 Server Side include with retries:
+
+=over 4
+
+=item * &ssi_with_retries(resource,retries form)
+
+Performs an ssi with some number of retries.  Retries continue either
+until the result is ok or until the retry count supplied by the
+caller is exhausted.
+
+Inputs:
+
+=over 4
+
+resource   - Identifies the resource to insert.
+
+retries    - Count of the number of retries allowed.
+
+form       - Hash that identifies the rendering options.
+
+=back
+
+Returns:
+
+=over 4
+
+content    - The content of the response.  If retries were exhausted this is empty.
+
+response   - The response from the last attempt (which may or may not have been successful.
+
+=back
+
+=back
+
+=cut
+
+sub ssi_with_retries {
+    my ($resource, $retries, %form) = @_;
+
+
+    my $ok = 0;                 # True if we got a good response.
+    my $content;
+    my $response;
+
+    # Try to get the ssi done. within the retries count:
+
+    do {
+        ($content, $response) = &Apache::lonnet::ssi($resource, %form);
+        $ok      = $response->is_success;
+        if (!$ok) {
+            &Apache::lonnet::logthis("Failed ssi_with_retries on $resource: ".$response->is_success.', '.$response->code.', '.$response->message);
+        }
+        $retries--;
+    } while (!$ok && ($retries > 0));
+
+    if (!$ok) {
+        $content = '';          # On error return an empty content.
+    }
+    return ($content, $response);
+
+}
+
+
+
 # ----------------------------------------------- Filetypes/Languages/Copyright
 my %language;
 my %supported_language;
@@ -782,10 +851,10 @@ sub helpLatexCheatsheet {
     }
     return '<table><tr><td>'.
 	$addOther .
-	&Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
+	&Apache::loncommon::help_open_topic("Greek_Symbols",&mt('Greek Symbols'),
 					    undef,undef,600)
 	.'</td><td>'.
-	&Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
+	&Apache::loncommon::help_open_topic("Other_Symbols",&mt('Other Symbols'),
 					    undef,undef,600)
 	.'</td></tr></table>';
 }
@@ -3110,7 +3179,7 @@ sub get_student_view {
   }
   if (defined($target)) { $form{'grade_target'} = $target; }
   $feedurl=&Apache::lonnet::clutter($feedurl);
-  my $userview=&Apache::lonnet::ssi_body($feedurl,%form);
+  my ($userview,$response)=&Apache::lonnet::ssi_body($feedurl,%form);
   $userview=~s/\<body[^\>]*\>//gi;
   $userview=~s/\<\/body\>//gi;
   $userview=~s/\<html\>//gi;
@@ -3119,7 +3188,39 @@ sub get_student_view {
   $userview=~s/\<\/head\>//gi;
   $userview=~s/action\s*\=/would_be_action\=/gi;
   $userview=&relative_to_absolute($feedurl,$userview);
-  return $userview;
+  if (wantarray) {
+      return ($userview,$response);
+  } else {
+      return $userview;
+  }
+}
+
+sub get_student_view_with_retries {
+    my ($symb,$retries,$username,$domain,$courseid,$target,$moreenv) = @_;
+
+    my $ok = 0;                 # True if we got a good response.
+    my $content;
+    my $response;
+
+    # Try to get the student_view done. within the retries count:
+    
+    do {
+        ($content, $response) = &get_student_view($symb,$username,$domain,$courseid,$target,$moreenv);
+        $ok = $response->is_success;
+        if (!$ok) {
+            &Apache::lonnet::logthis("Failed get_student_view_with_retries on $symb: ".$response->is_success.', '.$response->code.', '.$response->message);
+        }
+        $retries--;
+    } while (!$ok && ($retries > 0));
+    
+    if (!$ok) {
+        $content = '';          # On error return an empty content.
+    }
+    if (wantarray) {
+        return ($content, $response);
+    } else {
+        return $content;
+    }
 }
 
 =pod
@@ -3791,10 +3892,10 @@ Returns: value of designparamter $which
 sub designparm {
     my ($which,$domain)=@_;
     if ($env{'browser.blackwhite'} eq 'on') {
-	if ($which=~/\.(font|alink|vlink|link)$/) {
+	if ($which=~/\.(font|alink|vlink|link|textcol)$/) {
 	    return '#000000';
 	}
-	if ($which=~/\.(pgbg|sidebg)$/) {
+	if ($which=~/\.(pgbg|sidebg|bgcol)$/) {
 	    return '#FFFFFF';
 	}
 	if ($which=~/\.tabbg$/) {
@@ -3813,7 +3914,7 @@ sub designparm {
         $output = $defaultdesign{$which};
     }
     if (($which =~ /^(student|coordinator|author|admin)\.img$/) ||
-        ($which =~ /login\.(img|logo|domlogo)/)) {
+        ($which =~ /login\.(img|logo|domlogo|login)/)) {
         if ($output =~ m{^/(adm|res)/}) {
 	    if ($output =~ m{^/res/}) {
 		my $local_name = &Apache::lonnet::filelocation('',$output);
@@ -3981,7 +4082,7 @@ ENDROLE
         $dc_info = '('.$dc_info.')';
     }
 
-    if ($env{'environment.remote'} eq 'off') {
+    if (($env{'environment.remote'} eq 'off') || ($args->{'suppress_header_logos'})) {
         # No Remote
 	if ($env{'request.state'} eq 'construct') {
 	    $forcereg=1;
@@ -4004,10 +4105,10 @@ ENDROLE
 		$lastitem = $thisdisfn;
 	    }
 	    $titleinfo = 
-		&Apache::loncommon::help_open_menu('','',3,'Authoring').
-		'<b>Construction Space</b>:&nbsp;'. 
-		'<form name="dirs" method="post" action="'.$formaction
-		.'" target="_top"><tt><b>'
+		&Apache::loncommon::help_open_menu('','',3,'Authoring')
+		.'<b>'.&mt('Construction Space').'</b>:&nbsp;'
+		.'<form name="dirs" method="post" action="'.$formaction.'"'
+		.' target="_top"><tt><b>'
 		.&Apache::lonhtmlcommon::crumbs($uname.'/'.$parentpath,'_top','/priv','','+1',1)."<font size=\"+1\">$lastitem</font></b></tt><br />"
 		.&Apache::lonhtmlcommon::select_recent('construct','recent','this.form.action=this.form.recent.value;this.form.submit()')
 		.'</form>'
@@ -4130,18 +4231,25 @@ sub make_attr_string {
 
 Returns a uniform footer for LON-CAPA web pages.
 
-Inputs: none
+Inputs: 1 - optional reference to an args hash
+If in the hash, key for noredirectlink has a value which evaluates to true,
+a 'Continue' link is not displayed if the page contains an
+internal redirect in the <head></head> section,
+i.e., $env{'internal.head.redirect'} exists   
 
 =cut
 
 sub endbodytag {
+    my ($args) = @_;
     my $endbodytag='</body>';
     $endbodytag=&Apache::lontexconvert::jsMath_process()."\n".$endbodytag;
     if ( exists( $env{'internal.head.redirect'} ) ) {
-	$endbodytag=
-	    "<br /><a href=\"$env{'internal.head.redirect'}\">".
-	    &mt('Continue').'</a>'.
-	    $endbodytag;
+        if (!(ref($args) eq 'HASH' && $args->{'noredirectlink'})) {
+	    $endbodytag=
+	        "<br /><a href=\"$env{'internal.head.redirect'}\">".
+	        &mt('Continue').'</a>'.
+	        $endbodytag;
+        }
     }
     return $endbodytag;
 }
@@ -4404,6 +4512,7 @@ td.LC_menubuttons_img {
 }
 .LC_new_mail {
   font-family: $sans;
+  background: $tabbg;
   font-weight: bold;
 }
 
@@ -4490,6 +4599,10 @@ table.LC_aboutme_port tr.LC_even_row td
 table.LC_data_table tr.LC_data_table_highlight td {
   background-color: $data_table_darker;
 }
+table.LC_data_table tr td.LC_leftcol_header {
+  background-color: $data_table_head;
+  font-weight: bold;
+}
 table.LC_data_table tr.LC_empty_row td,
 table.LC_nested tr.LC_empty_row td {
   background-color: #FFFFFF;
@@ -5511,7 +5624,7 @@ sub end_page {
     if ($args->{'frameset'}) {
 	$result .= '</frameset>';
     } else {
-	$result .= &endbodytag();
+	$result .= &endbodytag($args);
     }
     $result .= "\n</html>";
 
@@ -8080,14 +8193,21 @@ sub construct_course {
 	$cenv{'url'}=$oldcenv{'url'};
 # Restore title
 	$cenv{'description'}=$oldcenv{'description'};
-# restore grading mode
-	if (defined($oldcenv{'grading'})) {
-	    $cenv{'grading'}=$oldcenv{'grading'};
-	}
 # Mark as cloned
 	$cenv{'clonedfrom'}=$cloneid;
-	delete($cenv{'default_enrollment_start_date'});
-	delete($cenv{'default_enrollment_end_date'});
+# Need to clone grading mode
+        my %newenv=&Apache::lonnet::get('environment',['grading'],$$crsudom,$$crsunum);
+        $cenv{'grading'}=$newenv{'grading'};
+# Do not clone these environment entries
+        &Apache::lonnet::del('environment',
+                  ['default_enrollment_start_date',
+                   'default_enrollment_end_date',
+                   'question.email',
+                   'policy.email',
+                   'comment.email',
+                   'pch.users.denied',
+                   'plc.users.denied'],
+                   $$crsudom,$$crsunum);
     }
 
 #