--- loncom/xml/lonxml.pm 2002/01/02 13:18:26 1.144 +++ loncom/xml/lonxml.pm 2002/09/04 21:01:33 1.193 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # XML Parser Module # -# $Id: lonxml.pm,v 1.144 2002/01/02 13:18:26 matthew Exp $ +# $Id: lonxml.pm,v 1.193 2002/09/04 21:01:33 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -54,19 +54,22 @@ # Dec Guy Albertelli # YEAR=2002 # 1/1 Gerd Kortemeyer +# 1/2 Matthew Hall +# 1/3 Gerd Kortemeyer # package Apache::lonxml; use vars -qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace); +qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode); use strict; -use HTML::TokeParser; -use HTML::TreeBuilder; -use Safe; -use Safe::Hole; -use Math::Cephes qw(:trigs :hypers :bessels erf erfc); -use Math::Random qw(:all); -use Opcode; +use HTML::LCParser(); +use HTML::TreeBuilder(); +use HTML::Entities(); +use Safe(); +use Safe::Hole(); +use Math::Cephes(); +use Math::Random(); +use Opcode(); sub register { my ($space,@taglist) = @_; @@ -87,15 +90,15 @@ sub deregister { } use Apache::Constants qw(:common); -use Apache::lontexconvert; -use Apache::style; -use Apache::run; -use Apache::londefdef; -use Apache::scripttag; -use Apache::edit; -use Apache::lonnet; -use Apache::File; -use Apache::loncommon; +use Apache::lontexconvert(); +use Apache::style(); +use Apache::run(); +use Apache::londefdef(); +use Apache::scripttag(); +use Apache::edit(); +use Apache::lonnet(); +use Apache::File(); +use Apache::loncommon(); #================================================== Main subroutine: xmlparse #debugging control, to turn on debugging modify the correct handler @@ -126,9 +129,15 @@ $evaluate = 1; # stores the list of active tag namespaces @namespace=(); +# if 0 all high ASCII characters will be encoded into HTML Entities +$prevent_entity_encode=0; + # has the dynamic menu been updated to know about this resource $Apache::lonxml::registered=0; +# a pointer the the Apache request object +$Apache::lonxml::request=''; + sub xmlbegin { my $output=''; if ($ENV{'browser.mathml'}) { @@ -167,16 +176,19 @@ sub xmlend { unless (($hidden) && (!$seeid)) { my $message=$contrib{$idx.':message'}; $message=~s/\n/\
/g; + $message=&Apache::lontexconvert::msgtexconverted($message); if ($message) { if ($hidden) { $message=''.$message.''; } my $sender='Anonymous'; if ((!$contrib{$idx.':anonymous'}) || ($seeid)) { - $sender=$contrib{$idx.':sendername'}.' at '. - $contrib{$idx.':senderdomain'}; + $sender=$contrib{$idx.':plainname'}.' ('. + $contrib{$idx.':sendername'}.' at '. + $contrib{$idx.':senderdomain'}.')'; if ($contrib{$idx.':anonymous'}) { - $sender.=' (anonymous)'; + $sender.=' [anonymous] '. + $contrib{$idx.':screenname'}; } if ($seeid) { if ($hidden) { @@ -187,6 +199,10 @@ sub xmlend { $symb.':::'.$idx.'">Hide'; } } + } else { + if ($contrib{$idx.':screenname'}) { + $sender=''.$contrib{$idx.':screenname'}.''; + } } $discussion.='

'.$sender.' ('. localtime($contrib{$idx.':timestamp'}). @@ -288,11 +304,14 @@ sub printtokenheader { $reply{'generation'}; if ($target eq 'web') { + my %idhash=&Apache::lonnet::idrget($tudom,($tuname)); return ''. 'Checked out for '.$plainname. '
User: '.$tuname.' at '.$tudom. + '
ID: '.$idhash{$tuname}. '
CourseID: '.$tcrsid. + '
Course: '.$ENV{'course.'.$tcrsid.'.description'}. '
DocID: '.$token. '
Time: '.localtime().'

'; } else { @@ -311,46 +330,55 @@ sub fontsettings() { sub registerurl { my $forcereg=shift; - if ($ENV{'request.publicaccess'}) { - return + my $target = shift; + my $result = ''; + if ($target eq 'edit') { + $result .="\n"; + } + if ((($ENV{'request.publicaccess'}) || + (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) && + (!$forcereg)) { + return $result. ''; } if ($Apache::lonxml::registered && !$forcereg) { return ''; } $Apache::lonxml::registered=1; + my $nothing=''; + if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; } + my $timesync='menu.syncclock(1000*'.time.');'; if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) { my $hwkadd=''; - if ($ENV{'REQUEST_URI'}=~/\.(problem|exam|quiz|assess|survey|form)$/) { + if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) { if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) { $hwkadd.=(< // BEGIN LON-CAPA Internal function LONCAPAreg() { - menu=window.open("","LONCAPAmenu"); + menu=window.open("$nothing","LONCAPAmenu","",false); menu.clearTimeout(menu.menucltim); + $timesync menu.currentURL=window.location.pathname; + menu.reloadURL=window.location.pathname; menu.currentStale=0; menu.clearbut(3,1); menu.switchbutton @@ -358,7 +386,7 @@ ENDPARM menu.switchbutton (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)'); menu.switchbutton - (8,2,'fdbk.gif','feedback','on this','gopost("/adm/feedback",currentURL)'); + (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)'); menu.switchbutton (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)'); menu.switchbutton @@ -375,10 +403,12 @@ ENDPARM } function LONCAPAstale() { - menu=window.open("","LONCAPAmenu"); + menu=window.open("$nothing","LONCAPAmenu","",false); menu.currentStale=1; - menu.switchbutton - (3,1,'reload.gif','return','location','go(currentURL)'); + if (menu.reloadURL!='' && menu.reloadURL!= null) { + menu.switchbutton + (3,1,'reload.gif','return','location','go(reloadURL)'); + } menu.clearbut(7,1); menu.clearbut(7,2); menu.clearbut(7,3); @@ -394,13 +424,14 @@ ENDPARM ENDREGTHIS } else { - return (< // BEGIN LON-CAPA Internal function LONCAPAreg() { - menu=window.open("","LONCAPAmenu"); + menu=window.open("$nothing","LONCAPAmenu","",false); + $timesync menu.currentStale=1; menu.clearbut(2,1); menu.clearbut(2,3); @@ -421,8 +452,8 @@ ENDREGTHIS // END LON-CAPA Internal ENDDONOTREGTHIS - } + return $result; } sub loadevents() { @@ -442,9 +473,26 @@ sub printalltags { } sub xmlparse { - my ($target,$content_file_string,$safeinit,%style_for_target) = @_; + my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_; + + &setup_globals($request,$target); +# +# do we have a course style file? +# + + if ($ENV{'request.course.id'}) { + my $bodytext= + $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'}; + if ($bodytext) { + my $location=&Apache::lonnet::filelocation('',$bodytext); + my $styletext=&Apache::lonnet::getfile($location); + if ($styletext ne '-1') { + %style_for_target = (%style_for_target, + &Apache::style::styleparser($target,$styletext)); + } + } + } - &setup_globals($target); #&printalltags(); my @pars = (); my $pwd=$ENV{'request.filename'}; @@ -458,7 +506,7 @@ sub xmlparse { ($target, my @tenta) = split('&&',$target); - my @stack = (); + my @stack = (); my @parstack = (); &initdepth; @@ -480,7 +528,7 @@ sub htmlclean { my $output= $tree->as_HTML(undef,' '); - $output=~s/\<(br|hr|img|meta|allow)([^\>\/]*)\>/\<$1$2 \/\>/gis; + $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis; $output=~s/\<\/(br|hr|img|meta|allow)\>//gis; unless ($full) { $output=~s/\<[\/]*(body|head|html)\>//gis; @@ -491,6 +539,22 @@ sub htmlclean { return $output; } +sub latex_special_symbols { + my ($current_token,$stack,$parstack)=@_; + $current_token=~s/\\/\\char92 /g; + $current_token=~s/\^/\\char94 /g; + $current_token=~s/\~/\\char126 /g; + $current_token=~s/(&[^a-z#])/\\$1/g; + $current_token=~s/([^&]\#)/\\$1/g; + $current_token=~s/(\$|_|{|})/\\$1/g; + $current_token=~s/\\char92 /\\texttt{\\char92}/g; + $current_token=~s/>/\$>\$/g; #more + $current_token=~s/get_token) { if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) { if ($metamode<1) { - $result=$token->[1]; + my $text=$token->[1]; + if ($token->[0] eq 'C' && $target eq 'tex') { + $text = '%'.$text; + $text =~ s/[\n\r]//g; + } + $result.=$text; } } elsif ($token->[0] eq 'PI') { if ($metamode<1) { @@ -528,8 +597,14 @@ sub inner_xmlparse { } elsif ($token->[0] eq 'E') { #clear out any tags that didn't end while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) { - &Apache::lonxml::warning('Missing tag </'.$$stack['-1'].'> in file'); - &end_tag($stack,$parstack,$token); + my $lasttag=$$stack[-1]; + if ($token->[1] =~ /^$lasttag$/i) { + &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>'); + last; + } else { + &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file'); + &end_tag($stack,$parstack,$token); + } } if (exists($$style_for_target{'/'."$token->[1]"})) { @@ -552,18 +627,28 @@ sub inner_xmlparse { #evaluate variable refs in result if ($result ne "") { if ( $#$parstack > -1 ) { - if ($Apache::lonxml::redirection) { - $Apache::lonxml::outputstack['-1'] .= - &Apache::run::evaluate($result,$safeeval,$$parstack['-1']); - } else { - $finaloutput .= &Apache::run::evaluate($result,$safeeval, - $$parstack['-1']); - } + $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]); } else { - $finaloutput .= &Apache::run::evaluate($result,$safeeval,''); + $result= &Apache::run::evaluate($result,$safeeval,''); + } + } + if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) { + if ($target eq 'tex') { + $result=&latex_special_symbols($result,$stack,$parstack); } - $result = ''; - } + } + + # Encode any high ASCII characters + if (!$Apache::lonxml::prevent_entity_encode) { + $result=&HTML::Entities::encode($result,"\200-\377"); + } + if ($Apache::lonxml::redirection) { + $Apache::lonxml::outputstack['-1'] .= $result; + } else { + $finaloutput.=$result; + } + $result = ''; + if ($token->[0] eq 'E') { &end_tag($stack,$parstack,$token); } @@ -576,6 +661,7 @@ sub inner_xmlparse { # $finaloutput.=&endredirection; # } + if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) { $finaloutput=&afterburn($finaloutput); } @@ -608,10 +694,16 @@ sub recurse { $safeeval, $style_for_target); } elsif ($tokenpat->[0] eq 'E') { #clear out any tags that didn't end - while ($tokenpat->[1] ne $innerstack[$#innerstack] + while ($tokenpat->[1] ne $innerstack[$#innerstack] && ($#innerstack > -1)) { - &Apache::lonxml::warning('Missing tag </'.$innerstack['-1'].'> in style'); - &end_tag(\@innerstack,\@innerparstack,$tokenpat); + my $lasttag=$innerstack[-1]; + if ($tokenpat->[1] =~ /^$lasttag$/i) { + &Apache::lonxml::warning('Using tag </'.$tokenpat->[1].'> as end tag to <'.$innerstack[-1].'>'); + last; + } else { + &Apache::lonxml::warning('Found tag </'.$tokenpat->[1].'> when looking for </'.$innerstack[-1].'> in file'); + &end_tag(\@innerstack,\@innerparstack,$tokenpat); + } } $partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat, \@innerstack, \@innerparstack, \@pat, @@ -672,13 +764,13 @@ sub callsub { } if (!$deleted) { if ($space) { - #&Apache::lonxml::debug("Calling sub $sub in $space $metamode
\n"); + &Apache::lonxml::debug("Calling sub $sub in $space $metamode"); $sub1="$space\:\:$sub"; ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack, $parstack,$parser,$safeeval, $style); } else { - #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode
\n"); + &Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode"); if ($metamode <1) { if (defined($token->[4]) && ($metamode < 1)) { $currentstring = $token->[4]; @@ -712,7 +804,8 @@ sub callsub { } sub setup_globals { - my ($target)=@_; + my ($request,$target)=@_; + $Apache::lonxml::request=$request; $Apache::lonxml::registered = 0; @Apache::lonxml::pwd=(); @Apache::lonxml::extlinks=(); @@ -741,6 +834,11 @@ sub setup_globals { $Apache::lonxml::metamode = 0; $Apache::lonxml::evaluate = 0; $Apache::lonxml::import = 0; + } elsif ($target eq 'analyze') { + $Apache::lonxml::redirection = 0; + $Apache::lonxml::metamode = 0; + $Apache::lonxml::evaluate = 1; + $Apache::lonxml::import = 1; } else { $Apache::lonxml::redirection = 0; $Apache::lonxml::metamode = 0; @@ -864,8 +962,35 @@ sub decreasedepth { #print "
e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"; } -sub get_all_text { +sub get_all_text_unbalanced { +#there is a copy of this in lonpublisher.pm + my($tag,$pars)= @_; + my $token; + my $result=''; + $tag='<'.$tag.'>'; + while ($token = $$pars[-1]->get_token) { + if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { + $result.=$token->[1]; + } elsif ($token->[0] eq 'PI') { + $result.=$token->[2]; + } elsif ($token->[0] eq 'S') { + $result.=$token->[4]; + } elsif ($token->[0] eq 'E') { + $result.=$token->[2]; + } + if ($result =~ /(.*)$tag(.*)/) { + &Apache::lonxml::debug('Got a winner with leftovers ::'.$2); + &Apache::lonxml::debug('Result is :'.$1); + $result=$1; + my $redo=$tag.$2; + &Apache::lonxml::newparser($pars,\$redo); + last; + } + } + return $result +} +sub get_all_text { my($tag,$pars)= @_; my $depth=0; my $token; @@ -880,10 +1005,10 @@ sub get_all_text { } elsif ($token->[0] eq 'PI') { $result.=$token->[2]; } elsif ($token->[0] eq 'S') { - if ($token->[1] eq $tag) { $depth++; } + if ($token->[1] =~ /^$tag$/i) { $depth++; } $result.=$token->[4]; } elsif ($token->[0] eq 'E') { - if ( $token->[1] eq $tag) { $depth--; } + if ( $token->[1] =~ /^$tag$/i) { $depth--; } #skip sending back the last end tag if ($depth > -1) { $result.=$token->[2]; } else { $pars->unget_token($token); @@ -898,7 +1023,7 @@ sub get_all_text { } elsif ($token->[0] eq 'PI') { $result.=$token->[2]; } elsif ($token->[0] eq 'S') { - if ( $token->[1] eq $tag) { + if ( $token->[1] =~ /^$tag$/i) { $pars->unget_token($token); last; } else { $result.=$token->[4]; @@ -914,7 +1039,7 @@ sub get_all_text { sub newparser { my ($parser,$contentref,$dir) = @_; - push (@$parser,HTML::TokeParser->new($contentref)); + push (@$parser,HTML::LCParser->new($contentref)); $$parser['-1']->xml_mode('1'); if ( $dir eq '' ) { push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]); @@ -931,7 +1056,7 @@ sub parstring { foreach (@{$token->[3]}) { unless ($_=~/\W/) { my $val=$token->[2]->{$_}; - $val =~ s/([\%\@\\])/\\$1/g; + $val =~ s/([\%\@\\\"])/\\$1/g; #if ($val =~ m/^[\%\@]/) { $val="\\".$val; } $temp .= "my \$$_=\"$val\";" } @@ -961,16 +1086,8 @@ sub writeallows { # sub afterburn { my $result=shift; - foreach (split(/&/,$ENV{'QUERY_STRING'})) { - my ($name, $value) = split(/=/,$_); - $value =~ tr/+/ /; - $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) { - unless ($ENV{'form.'.$name}) { - $ENV{'form.'.$name}=$value; - } - } - } + &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, + ['highlight','anchor','link']); if ($ENV{'form.highlight'}) { foreach (split(/\,/,$ENV{'form.highlight'})) { my $anchorname=$_; @@ -1006,13 +1123,13 @@ sub storefile { if (my $fh=Apache::File->new('>'.$file)) { print $fh $contents; $fh->close(); + } else { + &warning("Unable to save file $file"); } } -sub inserteditinfo { - my ($result,$filecontents)=@_; - unless ($filecontents) { - $filecontents=(< @@ -1026,28 +1143,67 @@ sub inserteditinfo { </body> </html> SIMPLECONTENT - } - my $editheader='<a href="#editsection">Edit below</a><hr />'; + return $filecontents; +} + + +sub inserteditinfo { + my ($result,$filecontents)=@_; + $filecontents = &HTML::Entities::encode($filecontents); +# my $editheader='<a href="#editsection">Edit below</a><hr />'; + my $buttons=(<<BUTTONS); +<input type="submit" name="attemptclean" + value="Save and then attempt to clean HTML" /> +<input type="submit" name="savethisfile" value="Save this" /> +<input type="submit" name="viewmode" value="View" /> +BUTTONS my $editfooter=(<<ENDFOOTER); <hr /> <a name="editsection" /> <form method="post"> +<input type="hidden" name="editmode" value="Edit" /> +$buttons<br /> <textarea cols="80" rows="40" name="filecont">$filecontents</textarea> +<br />$buttons <br /> -<input type="submit" name="attemptclean" - value="Save and then attempt to clean HTML" /> -<input type="submit" name="savethisfile" value="Save this" /> </form> ENDFOOTER - $result=~s/(\<body[^\>]*\>)/$1$editheader/is; +# $result=~s/(\<body[^\>]*\>)/$1$editheader/is; $result=~s/(\<\/body\>)/$editfooter/is; return $result; } +sub get_target { + my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}); + if ( $ENV{'request.state'} eq 'published') { + if ( defined($ENV{'form.grade_target'}) + && ($viewgrades == 'F' )) { + return ($ENV{'form.grade_target'}); + } elsif (defined($ENV{'form.grade_target'})) { + if (($ENV{'form.grade_target'} eq 'web') || + ($ENV{'form.grade_target'} eq 'tex') ) { + return $ENV{'form.grade_target'} + } else { + return 'web'; + } + } else { + return 'web'; + } + } elsif ($ENV{'request.state'} eq 'construct') { + if ( defined($ENV{'form.grade_target'})) { + return ($ENV{'form.grade_target'}); + } else { + return 'web'; + } + } else { + return 'web'; + } +} + sub handler { my $request=shift; - my $target='web'; + my $target=&get_target(); $Apache::lonxml::debug=0; @@ -1072,7 +1228,7 @@ sub handler { } } my %mystyle; - my $result = ''; + my $result = ''; my $filecontents=&Apache::lonnet::getfile($file); if ($filecontents == -1) { $result=(<<ENDNOTFOUND); @@ -1086,42 +1242,57 @@ sub handler { </html> ENDNOTFOUND $filecontents=''; + if ($ENV{'request.state'} ne 'published') { + $filecontents=&createnewhtml(); + $ENV{'form.editmode'}='Edit'; #force edit mode + } } else { - unless ($ENV{'request.state'} eq 'published') { - if ($ENV{'form.attemptclean'}) { - $filecontents=&htmlclean($filecontents,1); - } + unless ($ENV{'request.state'} eq 'published') { + if ($ENV{'form.attemptclean'}) { + $filecontents=&htmlclean($filecontents,1); } - $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle); + } + if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) { + $result = &Apache::lonxml::xmlparse($request,$target,$filecontents, + '',%mystyle); + } } # # Edit action? Insert editing commands # unless ($ENV{'request.state'} eq 'published') { + if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) { + my $displayfile=$request->uri; + $displayfile=~s/^\/[^\/]*//; + $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile. + '</h3></body></html>'; $result=&inserteditinfo($result,$filecontents); + } } - + writeallows($request->uri); $request->print($result); return OK; } - + sub debug { if ($Apache::lonxml::debug eq 1) { - print("DEBUG:".$_[0]."<br />\n"); + $|=1; + print("DEBUG:".&HTML::Entities::encode($_[0])."<br />\n"); } } sub error { if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) { - print "<b>ERROR:</b>".$_[0]."<br />\n"; + # If printing in construction space, put the error inside <pre></pre> + print "<b>ERROR:</b>".join("\n",@_)."\n"; } else { print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />"; #notify author - &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]); + &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_)); #notify course if ( $ENV{'request.course.id'} ) { my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'}; @@ -1129,19 +1300,19 @@ sub error { foreach my $user (split /\,/, $users) { ($user,my $domain) = split /:/, $user; &Apache::lonmsg::user_normal_msg($user,$domain, - "Error [$declutter]",$_[0]); + "Error [$declutter]",join('<br />',@_)); } } #FIXME probably shouldn't have me get everything forever. - &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]); + &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_)); #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]); } } sub warning { if ($ENV{'request.state'} eq 'construct') { - print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n"; + print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n"; } } @@ -1150,6 +1321,7 @@ sub get_param { if ( ! $context ) { $context = -1; } my $args =''; if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; } + if ( ! $args ) { return undef; } if ( $args =~ /my \$$param=\"/ ) { return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #' } else {