--- loncom/interface/loncommon.pm 2003/02/03 18:03:52 1.76 +++ loncom/interface/loncommon.pm 2003/07/17 18:10:53 1.109 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # a pile of common routines # -# $Id: loncommon.pm,v 1.76 2003/02/03 18:03:52 harris41 Exp $ +# $Id: loncommon.pm,v 1.109 2003/07/17 18:10:53 matthew Exp $ # # Copyright Michigan State University Board of Trustees # @@ -79,8 +79,9 @@ 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 $readit; =pod @@ -150,8 +151,8 @@ BEGIN { while (<$fh>) { next if /^\#/; chomp; - my ($key,$val)=(split(/\s+/,$_,2)); - $language{$key}=$val; + my ($key,$two,$country,$three,$enc,$val)=(split(/\t/,$_)); + $language{$key}=$val.' - '.$enc; } } } @@ -328,7 +329,7 @@ sub studentbrowser_javascript { } url += 'form=' + formname + '&unameelement='+uname+ '&udomelement='+udom; - var title = 'Student Browser'; + var title = 'Student_Browser'; var options = 'scrollbars=1,resizable=1,menubar=0'; options += ',width=700,height=600'; stdeditbrowser = open(url,title,options,'1'); @@ -345,7 +346,37 @@ sub selectstudent_link { return ''; } return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele. - '","'.$udomele.'");'."'>Select</a>"; + '","'.$udomele.'");'."'>Select User</a>"; +} + +sub coursebrowser_javascript { + return (<<'ENDSTDBRW'); +<script type="text/javascript" language="Javascript" > + var stdeditbrowser; + function opencrsbrowser(formname,uname,udom) { + var url = '/adm/pickcourse?'; + var filter; + if (filter != null) { + if (filter != '') { + url += 'filter='+filter+'&'; + } + } + url += 'form=' + formname + '&cnumelement='+uname+ + '&cdomelement='+udom; + var title = 'Course_Browser'; + var options = 'scrollbars=1,resizable=1,menubar=0'; + options += ',width=700,height=600'; + stdeditbrowser = open(url,title,options,'1'); + stdeditbrowser.focus(); + } +</script> +ENDSTDBRW +} + +sub selectcourse_link { + my ($form,$unameele,$udomele)=@_; + return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele. + '","'.$udomele.'");'."'>Select Course</a>"; } ############################################################### @@ -518,6 +549,10 @@ 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' || + $ENV{'environment.remote'} eq 'off' ) { + $stayOnPage=1; + } $width = 350 if (not defined $width); $height = 400 if (not defined $height); my $filename = $topic; @@ -538,18 +573,40 @@ sub help_open_topic { # Add the text if ($text ne "") { - $template .= "<a href=\"$link\">$text</a> "; + $template .= + "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>". + "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>"; } # Add the graphic $template .= <<"ENDTEMPLATE"; -<a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a> + <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a> ENDTEMPLATE - + if ($text ne '') { $template.='</td></tr></table>' }; return $template; } +# 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) @@ -595,18 +652,48 @@ sub get_domains { =pod -=item select_dom_form($defdom,$name) +=item select_form($defdom,$name,%hash) + +Returns a string containing a <select name='$name' size='1'> form to +allow a user to select options from a hash option_name => displayed text. +See lonrights.pm for an example invocation and use. + +=cut + +#------------------------------------------- +sub select_form { + my ($def,$name,%hash) = @_; + my $selectform = "<select name=\"$name\" size=\"1\">\n"; + foreach (sort keys %hash) { + $selectform.="<option value=\"$_\" ". + ($_ eq $def ? 'selected' : ''). + ">".$hash{$_}."</option>\n"; + } + $selectform.="</select>"; + return $selectform; +} + + +#------------------------------------------- + +=pod + +=item select_dom_form($defdom,$name,$includeempty) Returns a string containing a <select name='$name' size='1'> form to allow a user to select the domain to preform an operation in. See loncreateuser.pm for an example invocation and use. +If the $includeempty flag is set, it also includes an empty choice ("no domain +selected"); + =cut #------------------------------------------- sub select_dom_form { - my ($defdom,$name) = @_; + my ($defdom,$name,$includeempty) = @_; my @domains = get_domains(); + if ($includeempty) { @domains=('',@domains); } my $selectdomain = "<select name=\"$name\" size=\"1\">\n"; foreach (@domains) { $selectdomain.="<option value=\"$_\" ". @@ -668,6 +755,75 @@ sub home_server_option_list { ############################################################### ############################################################### +############################################################### + +=pod + +=item &decode_user_agent() + +Inputs: $r + +Outputs: + +=over 4 + +=item $httpbrowser + +=item $clientbrowser + +=item $clientversion + +=item $clientmathml + +=item $clientunicode + +=item $clientos + +=back + +=cut + +############################################################### +############################################################### +sub decode_user_agent { + my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"}); + my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"}); + my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; + my $clientbrowser='unknown'; + my $clientversion='0'; + my $clientmathml=''; + my $clientunicode='0'; + for (my $i=0;$i<=$#browsertype;$i++) { + my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]); + if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) { + $clientbrowser=$bname; + $httpbrowser=~/$vreg/i; + $clientversion=$1; + $clientmathml=($clientversion>=$minv); + $clientunicode=($clientversion>=$univ); + } + } + my $clientos='unknown'; + if (($httpbrowser=~/linux/i) || + ($httpbrowser=~/unix/i) || + ($httpbrowser=~/ux/i) || + ($httpbrowser=~/solaris/i)) { $clientos='unix'; } + if (($httpbrowser=~/vax/i) || + ($httpbrowser=~/vms/i)) { $clientos='vms'; } + if ($httpbrowser=~/next/i) { $clientos='next'; } + if (($httpbrowser=~/mac/i) || + ($httpbrowser=~/powerpc/i)) { $clientos='mac'; } + if ($httpbrowser=~/win/i) { $clientos='win'; } + if ($httpbrowser=~/embed/i) { $clientos='pda'; } + return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml, + $clientunicode,$clientos,); +} + +############################################################### +############################################################### + + +############################################################### ## Authentication changing form generation subroutines ## ############################################################### ## @@ -709,11 +865,27 @@ See loncreateuser.pm for invocation and sub authform_header{ my %in = ( formname => 'cu', - kerb_def_dom => 'MSU.EDU', + kerb_def_dom => '', @_, ); $in{'formname'} = 'document.' . $in{'formname'}; my $result=''; + +#---------------------------------------------- Code for upper case translation + my $Javascript_toUpperCase; + unless ($in{kerb_def_dom}) { + $Javascript_toUpperCase =<<"END"; + switch (choice) { + case 'krb': currentform.elements[choicearg].value = + currentform.elements[choicearg].value.toUpperCase(); + break; + default: + } +END + } else { + $Javascript_toUpperCase = ""; + } + $result.=<<"END"; var current = new Object(); current.radiovalue = 'nochange'; @@ -747,12 +919,7 @@ function changed_radio(choice,currentfor function changed_text(choice,currentform) { var choicearg = choice + 'arg'; if (currentform.elements[choicearg].value !='') { - switch (choice) { - case 'krb': currentform.elements[choicearg].value = - currentform.elements[choicearg].value.toUpperCase(); - break; - default: - } + $Javascript_toUpperCase // clear old field if ((current.argfield != choicearg) && (current.argfield != null)) { currentform.elements[current.argfield].value = ''; @@ -808,18 +975,26 @@ sub authform_kerberos{ my %in = ( formname => 'document.cu', kerb_def_dom => 'MSU.EDU', + kerb_def_auth => 'krb4', @_, ); my $result=''; + my $check4; + my $check5; + if ($in{'kerb_def_auth'} eq 'krb5') { + $check5 = " checked=\"on\""; + } else { + $check4 = " checked=\"on\""; + } $result.=<<"END"; <input type="radio" name="login" value="krb" onclick="javascript:changed_radio('krb',$in{'formname'});" onchange="javascript:changed_radio('krb',$in{'formname'});" /> Kerberos authenticated with domain -<input type="text" size="10" name="krbarg" value="" +<input type="text" size="10" name="krbarg" value="$in{'kerb_def_dom'}" onchange="javascript:changed_text('krb',$in{'formname'});" /> -<input type="radio" name="krbver" value="4" checked="on" />Version 4 -<input type="radio" name="krbver" value="5" />Version 5 +<input type="radio" name="krbver" value="4" $check4 />Version 4 +<input type="radio" name="krbver" value="5" $check5 />Version 5 END return $result; } @@ -883,6 +1058,89 @@ END ############################################################### ############################################################### +## Get Authentication Defaults for Domain ## +############################################################### +## +## Returns default authentication type and an associated argument +## as listed in file domain.tab +## +#------------------------------------------- + +=pod + +=item get_auth_defaults + +get_auth_defaults($target_domain) returns the default authentication +type and an associated argument (initial password or a kerberos domain). +These values are stored in lonTabs/domain.tab + +($def_auth, $def_arg) = &get_auth_defaults($target_domain); + +If target_domain is not found in domain.tab, returns nothing (''). + +=over 4 + +=item get_auth_defaults + +=back + +=cut + +#------------------------------------------- +sub get_auth_defaults { + my $domain=shift; + return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain}); +} +############################################################### +## End Get Authentication Defaults for Domain ## +############################################################### + +############################################################### +## Get Kerberos Defaults for Domain ## +############################################################### +## +## Returns default kerberos version and an associated argument +## as listed in file domain.tab. If not listed, provides +## appropriate default domain and kerberos version. +## +#------------------------------------------- + +=pod + +=item get_kerberos_defaults + +get_kerberos_defaults($target_domain) returns the default kerberos +version and domain. If not found in domain.tabs, it defaults to +version 4 and the domain of the server. + +($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain); + +=over 4 + +=item get_kerberos_defaults + +=back + +=cut + +#------------------------------------------- +sub get_kerberos_defaults { + my $domain=shift; + my ($krbdef,$krbdefdom) = + &Apache::loncommon::get_auth_defaults($domain); + unless ($krbdef =~/^krb/ && $krbdefdom) { + $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/; + my $krbdefdom=$1; + $krbdefdom=~tr/a-z/A-Z/; + $krbdef = "krb4"; + } + return ($krbdef,$krbdefdom); +} +############################################################### +## End Get Kerberos Defaults for Domain ## +############################################################### + +############################################################### ## Thesaurus Functions ## ############################################################### @@ -996,7 +1254,17 @@ sub get_related_words { ############################################################### # -------------------------------------------------------------- Plaintext name +=pod +=item plainname($uname,$udom) + +Gets a users name and returns it as a string in +"first middle last generation" +form + +=cut + +############################################################### sub plainname { my ($uname,$udom)=@_; my %names=&Apache::lonnet::get('environment', @@ -1010,7 +1278,21 @@ sub plainname { } # -------------------------------------------------------------------- Nickname +=pod + +=item nickname($uname,$udom) + +Gets a users name and returns it as a string as + +""nickname"" +if the user has a nickname or + +"first middle last generation" + +if the user does not + +=cut sub nickname { my ($uname,$udom)=@_; @@ -1031,6 +1313,14 @@ sub nickname { # ------------------------------------------------------------------ Screenname +=pod + +=item screenname($uname,$udom) + +Gets a users screenname and returns it as a string + +=cut + sub screenname { my ($uname,$udom)=@_; my %names= @@ -1063,9 +1353,11 @@ sub aboutmewrapper { sub syllabuswrapper { - my ($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 @@ -1078,6 +1370,32 @@ sub languagedescription { return $language{shift(@_)}; } +# ----------------------------------------------------------- Display Languages +# returns a hash with all desired display languages +# + +sub display_languages { + my %languages=(); + if ($ENV{'environment.languages'}) { + foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.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'})) { + $languages{$_}=1; + } + } + return %languages; +} + # --------------------------------------------------------------- Copyright IDs sub copyrightids { return sort(keys(%cprtag)); @@ -1196,6 +1514,41 @@ 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); @@ -1207,7 +1560,8 @@ 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}; @@ -1219,11 +1573,12 @@ 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'); @@ -1233,7 +1588,7 @@ 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}; @@ -1342,8 +1697,10 @@ sub domainlogo { my $domain = &determinedomain(shift); # See if there is a logo if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') { - return '<img src="http://'.$ENV{'HTTP_HOST'}.':8080/adm/lonDomLogos/'. - $domain.'.gif" />'; + my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'}; + if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; } + return '<img src="http://'.$ENV{'HTTP_HOST'}.':'.$lonhttpdPort. + '/adm/lonDomLogos/'.$domain.'.gif" />'; } elsif(exists($Apache::lonnet::domaindescription{$domain})) { return $Apache::lonnet::domaindescription{$domain}; } else { @@ -1364,6 +1721,9 @@ Returns: value of designparamter $which ############################################## sub designparm { my ($which,$domain)=@_; + if ($ENV{'environment.color.'.$which}) { + return $ENV{'environment.color.'.$which}; + } $domain=&determinedomain($domain); if ($designhash{$domain.'.'.$which}) { return $designhash{$domain.'.'.$which}; @@ -1388,6 +1748,8 @@ Inputs: $addentries, extra parameters for the <body> tag. $bodyonly, if defined, only return the <body> tag. $domain, if defined, force a given domain. + $forcereg, if page should register as content page (relevant for + text interface only) Returns: A uniform header for LON-CAPA web pages. If $bodyonly is nonzero, a string containing a <body> tag will be returned. @@ -1401,7 +1763,7 @@ other decorations will be returned. ############################################### sub bodytag { - my ($title,$function,$addentries,$bodyonly,$domain)=@_; + my ($title,$function,$addentries,$bodyonly,$domain,$forcereg)=@_; unless ($function) { $function='student'; if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) { @@ -1435,20 +1797,40 @@ sub bodytag { unless ($realm) { $realm=' '; } # 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> END + my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'. + $lonhttpdPort.$img.'" />'; if ($bodyonly) { return $bodytag; - } else { - return(<<ENDBODY); + } elsif ($ENV{'browser.interface'} eq 'textual') { +# Accessibility + return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web', + $forcereg). + '<h1>LON-CAPA: '.$title.'</h1>'; + } elsif ($ENV{'environment.remote'} eq 'off') { +# No Remote + return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web', + $forcereg). + '<table bgcolor="'.$pgbg.'" width="100%" border="0" cellspacing="3" cellpadding="3"><tr><td bgcolor="'.$tabbg.'"><font size="+3" color="'.$font.'"><b>'.$title. +'</b></font></td></tr></table>'; + } + +# +# Top frame rendering, Remote is up +# + return(<<ENDBODY); $bodytag <table width="100%" cellspacing="0" border="0" cellpadding="0"> -<tr><td bgcolor="$font"> -<img src="http://$ENV{'HTTP_HOST'}:8080/$img" /></td> -<td bgcolor="$font"><font color='$sidebg'>$messages</font></td> +<tr><td bgcolor="$sidebg"> +$upperleft</td> +<td bgcolor="$sidebg" align="right">$messages </td> </tr> <tr> <td rowspan="3" bgcolor="$tabbg"> @@ -1469,8 +1851,79 @@ $bodytag <td bgcolor="$tabbg" align="right"><font size="2">$realm</font> </td></tr> </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 { @@ -1773,6 +2226,37 @@ sub csv_samples_select_table { $i--; return($i); } + +=pod + +=item check_if_partid_hidden($id,$symb,$udom,$uname) + +Returns either 1 or undef + +1 if the part is to be hidden, undef if it is to be shown + +Arguments are: + +$id the id of the part to be checked +$symb, optional the symb of the resource to check +$udom, optional the domain of the user to check for +$uname, optional the username of the user to check for + +=cut + +sub check_if_partid_hidden { + my ($id,$symb,$udom,$uname) = @_; + my $hiddenparts=&Apache::lonnet::EXT('resource.0.parameter_hiddenparts', + $symb,$udom,$uname); + my @hiddenlist=split(/,/,$hiddenparts); + foreach my $checkid (@hiddenlist) { + if ($checkid =~ /^\s*\Q$id\E\s*$/) { return 1; } + } + return undef; +} + + + 1; __END__;