--- loncom/interface/loncommon.pm	2003/05/04 21:20:17	1.98
+++ loncom/interface/loncommon.pm	2003/08/13 20:40:31	1.111
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.98 2003/05/04 21:20:17 www Exp $
+# $Id: loncommon.pm,v 1.111 2003/08/13 20:40:31 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -79,7 +79,7 @@ use strict;
 use Apache::lonnet();
 use GDBM_File;
 use POSIX qw(strftime mktime);
-use Apache::Constants qw(:common);
+use Apache::Constants qw(:common :http :methods);
 use Apache::lonmsg();
 use Apache::lonmenu();
 my $readit;
@@ -311,14 +311,15 @@ END
 }
 
 sub studentbrowser_javascript {
-   unless ($ENV{'request.course.id'}) { return ''; }  
-   unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
-        return '';
-   }
+   unless (
+            (($ENV{'request.course.id'}) && 
+             (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
+         || ($ENV{'request.role'}=~/^(au|dc|su)/)
+          ) { return ''; }  
    return (<<'ENDSTDBRW');
 <script type="text/javascript" language="Javascript" >
     var stdeditbrowser;
-    function openstdbrowser(formname,uname,udom) {
+    function openstdbrowser(formname,uname,udom,roleflag) {
         var url = '/adm/pickstudent?';
         var filter;
         eval('filter=document.'+formname+'.'+uname+'.value;');
@@ -329,7 +330,8 @@ sub studentbrowser_javascript {
         }
         url += 'form=' + formname + '&unameelement='+uname+
                                     '&udomelement='+udom;
-        var title = 'Student Browser';
+	if (roleflag) { url+="&roles=1"; }
+        var title = 'Student_Browser';
         var options = 'scrollbars=1,resizable=1,menubar=0';
         options += ',width=700,height=600';
         stdeditbrowser = open(url,title,options,'1');
@@ -340,13 +342,19 @@ ENDSTDBRW
 }
 
 sub selectstudent_link {
-    my ($form,$unameele,$udomele)=@_;
-   unless ($ENV{'request.course.id'}) { return ''; }  
-   unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
-        return '';
-   }
-    return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
+   my ($form,$unameele,$udomele)=@_;
+   if ($ENV{'request.course.id'}) {  
+       unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
+	   return '';
+       }
+       return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
         '","'.$udomele.'");'."'>Select User</a>";
+   }
+   if ($ENV{'request.role'}=~/^(au|dc|su)/) {
+       return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
+        '","'.$udomele.'",1);'."'>Select User</a>";
+   }
+   return '';
 }
 
 sub coursebrowser_javascript {
@@ -363,7 +371,7 @@ sub coursebrowser_javascript {
         }
         url += 'form=' + formname + '&cnumelement='+uname+
                                     '&cdomelement='+udom;
-        var title = 'Course Browser';
+        var title = 'Course_Browser';
         var options = 'scrollbars=1,resizable=1,menubar=0';
         options += ',width=700,height=600';
         stdeditbrowser = open(url,title,options,'1');
@@ -549,7 +557,8 @@ sub help_open_topic {
     my ($topic, $text, $stayOnPage, $width, $height) = @_;
     $text = "" if (not defined $text);
     $stayOnPage = 0 if (not defined $stayOnPage);
-    if ($ENV{'browser.interface'} eq 'textual') {
+    if ($ENV{'browser.interface'} eq 'textual' ||
+	$ENV{'environment.remote'} eq 'off' ) {
 	$stayOnPage=1;
     }
     $width = 350 if (not defined $width);
@@ -586,6 +595,26 @@ ENDTEMPLATE
 
 }
 
+# This is a quicky function for Latex cheatsheet editing, since it 
+# appears in at least four places
+sub helpLatexCheatsheet {
+    my $other = shift;
+    my $addOther = '';
+    if ($other) {
+	$addOther = Apache::loncommon::help_open_topic($other, shift,
+						       undef, undef, 600) .
+							   '</td><td>';
+    }
+    return '<table><tr><td>'.
+	$addOther .
+	&Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
+					    undef,undef,600)
+	.'</td><td>'.
+	&Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
+					    undef,undef,600)
+	.'</td></tr></table>';
+}
+
 =pod
 
 =item csv_translate($text) 
@@ -1332,9 +1361,11 @@ sub aboutmewrapper {
 
 
 sub syllabuswrapper {
-    my ($link,$un,$do,$tf)=@_;
-    if ($tf) { $link='<font color="'.$tf.'">'.$link.'</font>'; }
-    return "<a href='/public/$do/$un/syllabus'>$link</a>";
+    my ($linktext,$coursedir,$domain,$fontcolor)=@_;
+    if ($fontcolor) { 
+        $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>'; 
+    }
+    return "<a href='/public/$domain/$coursedir/syllabus'>$linktext</a>";
 }
 
 # ---------------------------------------------------------------- Language IDs
@@ -1358,6 +1389,12 @@ sub display_languages {
 	    $languages{$_}=1;
         }
     }
+    if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
+	foreach (split(/\s*(\,|\;|\:)\s*/,
+	$ENV{'course.'.$ENV{'request.course.id'}.'.languages'})) {
+	    $languages{$_}=1;
+        }
+    }
     &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
     if ($ENV{'form.displaylanguage'}) {
 	foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
@@ -1485,6 +1522,41 @@ sub get_previous_attempt {
   }
 }
 
+sub relative_to_absolute {
+    my ($url,$output)=@_;
+    my $parser=HTML::TokeParser->new(\$output);
+    my $token;
+    my $thisdir=$url;
+    my @rlinks=();
+    while ($token=$parser->get_token) {
+	if ($token->[0] eq 'S') {
+	    if ($token->[1] eq 'a') {
+		if ($token->[2]->{'href'}) {
+		    $rlinks[$#rlinks+1]=$token->[2]->{'href'};
+		}
+	    } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
+		$rlinks[$#rlinks+1]=$token->[2]->{'src'};
+	    } elsif ($token->[1] eq 'base') {
+		$thisdir=$token->[2]->{'href'};
+	    }
+	}
+    }
+    $thisdir=~s-/[^/]*$--;
+    foreach (@rlinks) {
+	unless (($_=~/^http:\/\//i) ||
+		($_=~/^\//) ||
+		($_=~/^javascript:/i) ||
+		($_=~/^mailto:/i) ||
+		($_=~/^\#/)) {
+	    my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
+	    $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
+	}
+    }
+# -------------------------------------------------- Deal with Applet codebases
+    $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
+    return $output;
+}
+
 sub get_student_view {
   my ($symb,$username,$domain,$courseid,$target) = @_;
   my ($map,$id,$feedurl) = split(/___/,$symb);
@@ -1496,7 +1568,8 @@ sub get_student_view {
   }
   if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}
   &Apache::lonnet::appenv(%moreenv);
-  my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
+  $feedurl=&Apache::lonnet::clutter($feedurl);
+  my $userview=&Apache::lonnet::ssi_body($feedurl);
   &Apache::lonnet::delenv('form.grade_');
   foreach my $element (@elements) {
     $ENV{'form.grade_'.$element}=$old{$element};
@@ -1508,11 +1581,12 @@ sub get_student_view {
   $userview=~s/\<head\>//gi;
   $userview=~s/\<\/head\>//gi;
   $userview=~s/action\s*\=/would_be_action\=/gi;
+  $userview=&relative_to_absolute($feedurl,$userview);
   return $userview;
 }
 
 sub get_student_answers {
-  my ($symb,$username,$domain,$courseid) = @_;
+  my ($symb,$username,$domain,$courseid,%form) = @_;
   my ($map,$id,$feedurl) = split(/___/,$symb);
   my (%old,%moreenv);
   my @elements=('symb','courseid','domain','username');
@@ -1522,7 +1596,7 @@ sub get_student_answers {
   }
   $moreenv{'form.grade_target'}='answer';
   &Apache::lonnet::appenv(%moreenv);
-  my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
+  my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%form);
   &Apache::lonnet::delenv('form.grade_');
   foreach my $element (@elements) {
     $ENV{'form.grade_'.$element}=$old{$element};
@@ -1655,6 +1729,17 @@ Returns: value of designparamter $which
 ##############################################
 sub designparm {
     my ($which,$domain)=@_;
+    if ($ENV{'browser.blackwhite'} eq 'on') {
+	if ($which=~/\.(font|alink|vlink|link)$/) {
+	    return '#000000';
+	}
+	if ($which=~/\.(pgbg|sidebg)$/) {
+	    return '#FFFFFF';
+	}
+	if ($which=~/\.tabbg$/) {
+	    return '#CCCCCC';
+	}
+    }
     if ($ENV{'environment.color.'.$which}) {
 	return $ENV{'environment.color.'.$which};
     }
@@ -1719,7 +1804,11 @@ sub bodytag {
     my $alink=&designparm($function.'.alink',$domain);
     my $vlink=&designparm($function.'.vlink',$domain);
     my $sidebg=&designparm($function.'.sidebg',$domain);
-
+# Accessibility font enhance
+    unless ($addentries) { $addentries=''; }
+    if ($ENV{'browser.fontenhance'} eq 'on') {
+	$addentries.=' style="font-size: x-large"';
+    }
  # role and realm
     my ($role,$realm)
        =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
@@ -1731,9 +1820,10 @@ sub bodytag {
     unless ($realm) { $realm='&nbsp;'; }
 # Set messages
     my $messages=&domainlogo($domain);
-# Output
+# Port for miniserver
     my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
     if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
+# construct main body tag
     my $bodytag = <<END;
 <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
 $addentries>
@@ -1785,6 +1875,78 @@ $upperleft</td>
 </table><br>
 ENDBODY
 }
+
+###############################################
+
+sub get_posted_cgi {
+    my $r=shift;
+
+    my $buffer;
+    
+    $r->read($buffer,$r->header_in('Content-length'),0);
+    unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
+	my @pairs=split(/&/,$buffer);
+	my $pair;
+	foreach $pair (@pairs) {
+	    my ($name,$value) = split(/=/,$pair);
+	    $value =~ tr/+/ /;
+	    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+	    $name  =~ tr/+/ /;
+	    $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+	    &add_to_env("form.$name",$value);
+	}
+    } else {
+	my $contentsep=$1;
+	my @lines = split (/\n/,$buffer);
+	my $name='';
+	my $value='';
+	my $fname='';
+	my $fmime='';
+	my $i;
+	for ($i=0;$i<=$#lines;$i++) {
+	    if ($lines[$i]=~/^$contentsep/) {
+		if ($name) {
+		    chomp($value);
+		    if ($fname) {
+			$ENV{"form.$name.filename"}=$fname;
+			$ENV{"form.$name.mimetype"}=$fmime;
+		    } else {
+			$value=~s/\s+$//s;
+		    }
+		    &add_to_env("form.$name",$value);
+		}
+		if ($i<$#lines) {
+		    $i++;
+		    $lines[$i]=~
+		/Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
+		    $name=$1;
+		    $value='';
+		    if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
+			$fname=$1;
+			if 
+                            ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
+				$fmime=$1;
+				$i++;
+			    } else {
+				$fmime='';
+			    }
+		    } else {
+			$fname='';
+			$fmime='';
+		    }
+		    $i++;
+		}
+	    } else {
+		$value.=$lines[$i]."\n";
+	    }
+	}
+    }
+    $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
+    $r->method_number(M_GET);
+    $r->method('GET');
+    $r->headers_in->unset('Content-length');
+}
+
 ###############################################
 
 sub get_unprocessed_cgi {