File:
[LON-CAPA] /
rat /
lonpage.pm
Revision
1.96:
download - view:
text,
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select for diffs
Thu Jul 28 03:14:09 2011 UTC (13 years, 9 months ago) by
raeburn
Branches:
MAIN
CVS tags:
HEAD
- Bug 6459.
- Overwriting previously submitted file in "turned_in" portfolio.
- Prompt to confirm overwrite now supported for resources in .page.
- &file_delchk_js() and &file_overwritechk_js() routines in structuretags.pm
moved to a consolidated routine: &file_submissionchk_js() in lonhtmlcommon.pm
to facilitate re-use.
- Calls to &file_overwritechk_js() omitted from individual resources if
enclosing map is .page. Single call from lonpage.pm instead (with
refs to hashes with information about paths and numbers of response items
in resources in .page included there.
- Pop-up confirmations for overwrite and/or deletions supported for both
"Submit Answer" and "Submit All" button presses.
- Triggers for multiple response items aggregated into one pop-up
for overwrites, and one for deletions (if applicable).
- Generation of pop-up to confirm deletions in a .task now uses same mechanism
(separate file_delchk_js() eliminated).`
# The LearningOnline Network with CAPA
# Page Handler
#
# $Id: lonpage.pm,v 1.96 2011/07/28 03:14:09 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
###
package Apache::lonpage;
use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonxml();
use Apache::lonlocal;
use Apache::lonmenu;
use HTML::TokeParser;
use GDBM_File;
use Apache::lonsequence;
use lib '/home/httpd/lib/perl/';
use LONCAPA;
# -------------------------------------------------------------- Module Globals
my %hash;
my @rows;
# ------------------------------------------------------------------ Euclid gcd
sub euclid {
my ($e,$f)=@_;
my $a; my $b; my $r;
if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
while ($r!=0) {
$a=$b; $b=$r;
$r=$a%$b;
}
return $b;
}
# ------------------------------------------------------------ Build page table
sub tracetable {
my ($sofar,$rid,$beenhere)=@_;
my $further=$sofar;
my $randomout=0;
unless ($env{'request.role.adv'}) {
$randomout = $hash{'randomout_'.$rid};
}
unless ($beenhere=~/\&$rid\&/) {
$beenhere.=$rid.'&';
unless ($randomout) {
if (defined($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.$beenhere);
$sofar++;
if ($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})) {
my $mincond=1;
my $next='';
foreach (split(/\,/,$hash{'to_'.$rid})) {
my $thiscond=
&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
if ($thiscond>=$mincond) {
if ($next) {
$next.=','.$_.':'.$thiscond;
} else {
$next=$_.':'.$thiscond;
}
if ($thiscond>$mincond) { $mincond=$thiscond; }
}
}
foreach (split(/\,/,$next)) {
my ($linkid,$condval)=split(/\:/,$_);
if ($condval>=$mincond) {
my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
if ($now>$further) { $further=$now; }
}
}
}
}
return $further;
}
# ================================================================ Main Handler
sub handler {
my $r=shift;
# ------------------------------------------- Set document type for header only
if ($r->header_only) {
if ($env{'browser.mathml'}) {
&Apache::loncommon::content_type($r,'text/xml');
} else {
&Apache::loncommon::content_type($r,'text/html');
}
$r->send_http_header;
return OK;
}
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['forceselect','launch']);
my $number_of_columns = 1;
my $requrl=$r->uri;
my $target = $env{'form.grade_target'};
# Short term solution: define target as 'tex_answer' when retrieving answers
# for resources in a .page when generating printouts.
# A better long-term fix would be to modify the way problem rendering, and
# answer rendering are retrieved for individual resources when printing a .page,
# so rendered problem and answer are sequential for individual resources in
# the .page
#
if ($target eq 'answer') {
if ($env{'form.answer_output_mode'} eq 'tex') {
$target = 'tex_answer';
}
}
# &Apache::lonnet::logthis("Got a target of $target");
if ($target eq 'meta') {
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
return OK;
}
# ----------------------------------------------------------------- Tie db file
if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) {
my $fn=$env{'request.course.fn'};
if (-e "$fn.db") {
if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) {
# ------------------------------------------------------------------- Hash tied
my $firstres=$hash{'map_start_'.$requrl};
my $lastres=$hash{'map_finish_'.$requrl};
if (($firstres) && ($lastres)) {
# ----------------------------------------------------------------- Render page
@rows=();
&tracetable(0,$firstres,'&');
# ------------------------------------------------------------ Add to symb list
my $i;
my %symbhash=();
for ($i=0;$i<=$#rows;$i++) {
if ($rows[$i]) {
my @colcont=split(/\&/,$rows[$i]);
foreach my $rid (@colcont) {
my ($mapid,$resid)=split(/\./,$rid);
$symbhash{$hash{'src_'.$rid}}=
[$hash{'src_'.$rid},$resid];
}
}
}
&Apache::lonnet::symblist($requrl,%symbhash);
# ------------------------------------------------------------------ Page parms
my $j;
my $lcm=1;
my $contents=0;
my $nforms=0;
my $nuploads=0;
my %turninpaths;
my %multiresps;
my $turninparent;
my %ssibody=();
my %ssibgcolor=();
my %ssitext=();
my %ssilink=();
my %ssivlink=();
my %ssialink=();
my %cellemb=();
my $allscript='';
my $allmeta='';
my $isxml=0;
my $xmlheader='';
my $xmlbody='';
# --------------------------------------------- Get SSI output, post parameters
for ($i=0;$i<=$#rows;$i++) {
if ($rows[$i]) {
$contents++;
my @colcont=split(/\&/,$rows[$i]);
$lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
foreach (@colcont) {
my $src=$hash{'src_'.$_};
my ($extension)=($src=~/\.(\w+)$/);
if ($hash{'encrypted_'.$_}) {
$src=&Apache::lonenc::encrypted($src);
}
$cellemb{$_}=
&Apache::loncommon::fileembstyle($extension);
if ($cellemb{$_} eq 'ssi') {
# --------------------------------------------------------- This is an SSI cell
my ($mapid,$resid)=split(/\./,$_);
my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
my $prefix=$_.'_';
my %posthash=('request.prefix' => $prefix,
'LONCAPA_INTERNAL_no_discussion' => 'true',
'symb' => $symb);
if (($env{'form.grade_target'} eq 'tex') ||
($env{'form.answer_output_mode'} eq 'tex')) {
$posthash{'grade_target'}=$env{'form.grade_target'};
$posthash{'textwidth'}=$env{'form.textwidth'};
$posthash{'problem_split'}=$env{'form.problem_split'};
$posthash{'latex_type'}=$env{'form.latex_type'};
$posthash{'rndseed'}=$env{'form.rndseed'};
$posthash{'answer_output_mode'} = $env{'form.answer_output_mode'};
}
my $submitted=exists($env{'form.all_submit'});
if (!$submitted) {
foreach my $key (keys(%env)) {
if ($key=~/^form.\Q$prefix\Esubmit_/) {
$submitted=1;last;
}
}
}
if ($submitted) {
foreach my $key (keys(%env)) {
if ($key=~/^form.\Q$prefix\E/) {
my $name=$key;
$name=~s/^form.\Q$prefix\E//;
$posthash{$name}=$env{$key};
}
}
if (exists($env{'form.all_submit'})) {
$posthash{'all_submit'}='yes';
}
}
my $output=Apache::lonnet::ssi($src,%posthash);
$output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
if (($target eq 'tex') || ($target eq 'tex_answer')) {
$output =~ s/^([^&]+)\\begin{document}//;
$output =~ s/\\end{document}//;
# $output = '\parbox{\minipagewidth}{ '.$output.' }';
#some additional cleanup necessary for LateX (due to limitations of table environment
$output =~ s/(\\vskip\s*\d+mm)\s*(\\\\)+/$1/g;
}
my $parser=HTML::TokeParser->new(\$output);
my $token;
my $thisdir=$src;
my $bodydef=0;
my $thisxml=0;
my @rlinks=();
if ($output=~/\?xml/) {
$isxml=1;
$thisxml=1;
$output=~
/((?:\<(?:\?xml|\!DOC|html)[^\>]*(?:\>|\>\]\>)\s*)+)\<body[^\>]*\>/si;
$xmlheader=$1;
}
while ($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') {
$rlinks[$#rlinks+1]=
$token->[2]->{'src'};
} elsif ($token->[1] eq 'embed') {
$rlinks[$#rlinks+1]=
$token->[2]->{'src'};
} elsif ($token->[1] eq 'base') {
$thisdir=$token->[2]->{'href'};
} elsif ($token->[1] eq 'body') {
$bodydef=1;
$ssibgcolor{$_}=$token->[2]->{'bgcolor'};
$ssitext{$_}=$token->[2]->{'text'};
$ssilink{$_}=$token->[2]->{'link'};
$ssivlink{$_}=$token->[2]->{'vlink'};
$ssialink{$_}=$token->[2]->{'alink'};
if ($thisxml) {
$xmlbody=$token->[4];
}
} elsif ($token->[1] eq 'meta') {
if ($token->[4] !~ m:/>$:) {
$allmeta.="\n".$token->[4].'</meta>';
} else {
$allmeta.="\n".$token->[4];
}
} elsif (($token->[1] eq 'script') &&
($bodydef==0)) {
$allscript.="\n\n"
.$parser->get_text('/script');
}
}
}
if ($output=~/\<body[^\>]*\>(.*)/si) {
$output=$1;
}
$output=~s/\<\/body\>.*//si;
if ($output=~/\<form/si) {
$nforms++;
$output=~s/\<form[^\>]*\>//gsi;
$output=~s/\<\/form[^\>]*\>//gsi;
if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
$nuploads++;
}
$output=~
s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
if ($nuploads) {
$output=~
s/\<(input[^\>]+name=\"\Q$prefix\EHWFILE[^\>]+)\s*id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\)]*)\>/\<$1 id="$prefix$2" $3\>/gsi;
($turninpaths{$prefix},$multiresps{$prefix}) =
&Apache::loncommon::get_turnedin_filepath($symb,$env{'user.name'},$env{'user.domain'});
if ($turninparent eq '') {
$turninparent = $turninpaths{$prefix};
$turninparent =~ s{(/[^/]+)$}{};
}
}
$output=~
s/\<((?:input|select)[^\>]+\Qjavascript:setSubmittedPart\E)\(\s*[\'\"]([^\'\"]+)[\'\"]*\s*\)/\<$1('$2','$prefix')/gsi;
}
$thisdir=~s/\/[^\/]*$//;
foreach (@rlinks) {
unless (($_=~/^https?\:\/\//i) ||
($_=~/^\//) ||
($_=~/^javascript:/i) ||
($_=~/^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;
$ssibody{$_}=$output;
# ---------------------------------------------------------------- End SSI cell
}
}
}
}
unless ($contents) {
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
$r->print(&Apache::loncommon::start_page(undef,undef,
{'force_register' => 1,}));
$r->print(&mt('This page is either empty or it only contains resources that are currently hidden').'. ');
$r->print('<br /><br />'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course').
&Apache::loncommon::end_page());
} else {
# ------------------------------------------------------------------ Build page
# ---------------------------------------------------------------- Send headers
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
if ($isxml) {
&Apache::loncommon::content_type($r,'text/xml');
} else {
&Apache::loncommon::content_type($r,'text/html');
}
$r->send_http_header;
# ------------------------------------------------------------------------ Head
if ($allscript) {
$allscript =
"\n".'<script type="text/javascript">'."\n".
$allscript.
"\n</script>\n";
}
if (($nforms) && ($nuploads)) {
$allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps);
}
# ------------------------------------------------------------------ Start body
$r->print(&Apache::loncommon::start_page(undef,$allscript,
{'force_register' => 1,
'bgcolor' => '#ffffff',}));
# ------------------------------------------------------------------ Start form
if ($nforms) {
my $fmtag = '<form name="lonhomework" method="post" enctype="multipart/form-data"';
if ($nuploads) {
my $multi;
if ($nuploads > 1) {
$multi = 1;
}
$fmtag .= 'onsubmit="return file_submission_check(this,'."'$turninparent','$multi'".');"';
}
$fmtag .= ' action="'.
&Apache::lonenc::check_encrypt($requrl)
.'">';
$r->print($fmtag);
}
} elsif (($target eq 'tex') || ($target eq 'tex_answer')) {
# I think this is not needed as the header
# will be put in for each of the page parts
# by the londefdef.pm now that we are opening up
# the parts of a page.
#$r->print('\documentclass{article}
# \newcommand{\keephidden}[1]{}
# \usepackage[dvips]{graphicx}
# \usepackage{epsfig}
# \usepackage{calc}
# \usepackage{longtable}
# \begin{document}');
}
# ----------------------------------------------------------------- Start table
if (($target eq 'tex') || ($target eq 'tex_answer')) {
# # $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead ');
if ($number_of_columns le $lcm) {$number_of_columns=$lcm;};
} else {
$r->print('<table width="100%" cols="'.$lcm.'" border="0">');
}
# generate rows
for ($i=0;$i<=$#rows;$i++) {
if ($rows[$i]) {
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print("\n<tr>");
}
my @colcont=split(/\&/,$rows[$i]);
my $avespan=$lcm/($#colcont+1);
for ($j=0;$j<=$#colcont;$j++) {
my $rid=$colcont[$j];
my $metainfo =&get_buttons(\%hash,$rid).'<br />';
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print('<td colspan="'.$avespan.'"');
}
if ($cellemb{$rid} eq 'ssi') {
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
if ($ssibgcolor{$rid}) {
$r->print(' bgcolor="'.
$ssibgcolor{$rid}.'"');
}
$r->print('>'.$metainfo.'<font');
if ($ssitext{$rid}) {
$r->print(' text="'.$ssitext{$rid}.'"');
}
if ($ssilink{$rid}) {
$r->print(' link="'.$ssilink{$rid}.'"');
}
if ($ssitext{$rid}) {
$r->print(' vlink="'.$ssivlink{$rid}.'"');
}
if ($ssialink{$rid}) {
$r->print(' alink="'.$ssialink{$rid}.'"');
}
$r->print('>');
}
$r->print($ssibody{$rid});
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print('</font>');
}
if ($env{'course.'.
$env{'request.course.id'}.
'.pageseparators'} eq 'yes') {
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print('<hr />');
}
}
} elsif ($cellemb{$rid} eq 'img') {
$r->print('>'.$metainfo.'<img src="'.
$hash{'src_'.$rid}.'" />');
} elsif ($cellemb{$rid} eq 'emb') {
$r->print('>'.$metainfo.'<embed src="'.
$hash{'src_'.$rid}.'"></embed>');
} elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) {
$r->print($metainfo.'<b>'.$hash{'title_'.$rid}.'</b><br />'.
&mt('It is recommended that you use an up-to-date virus scanner before handling this file.').'</p><p><table>'.
&Apache::londocs::entryline(0,&mt("Click to download or use your browser's Save Link function"),'/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).'</table></p><br />');
}
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print('</td>');
} else {
# for (my $incol=1;$incol<=$avespan;$incol++) {
# $r->print(' & ');
# }
}
}
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print('</tr>');
} else {
# $r->print('REMOVETHEHEADOFLONGTABLE\\\\');
}
}
}
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print("\n</table>");
} else {
# $r->print('\end{longtable}\strut');
}
# ---------------------------------------------------------------- Submit, etc.
if ($nforms) {
$r->print(
'<input name="all_submit" value="Submit All" type="'.
(($nforms>1)?'submit':'hidden').'"></input></form>');
}
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print(&Apache::loncommon::end_page({'discussion'
=> 1,}));
} else {
$r->print('\end{document}'.$number_of_columns);
}
&Apache::lonnet::symblist($requrl,%symbhash);
my ($map,$id,$url)=&Apache::lonnet::decode_symb(&Apache::lonnet::symbread());
&Apache::lonnet::symblist($map,'last_known'=>[$url,$id]);
# -------------------------------------------------------------------- End page
}
# ------------------------------------------------------------- End render page
} else {
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
&Apache::lonsequence::viewmap($r,$requrl);
}
# ------------------------------------------------------------------ Untie hash
unless (untie(%hash)) {
&Apache::lonnet::logthis("<font color=blue>WARNING: ".
"Could not untie coursemap $fn (browse).</font>");
}
# -------------------------------------------------------------------- All done
return OK;
# ----------------------------------------------- Errors, hash could no be tied
}
}
}
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
&Apache::lonsequence::viewmap($r,$requrl);
return OK;
}
sub get_buttons {
my ($hash,$rid) = @_;
my $metainfo = '';
my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
my ($mapid,$resid)=split(/\./,$rid);
my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
$resid,
$hash->{'src_'.$rid});
if ($hash->{'encrypted_'.$rid}) {
$symb=&Apache::lonenc::encrypted($symb);
$esrc=&Apache::lonenc::encrypted($esrc);
}
if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
&& !$env{'request.enc'}
&& ($env{'request.role.adv'}
|| !$hash->{'encrypted_'.$rid})) {
$metainfo .='<a name="'.&escape($symb).'" />'.
'<a href="'.$hash->{'src_'.$rid}.'.meta'.'" target="LONcatInfo">'.
'<img src="/adm/lonMisc/cat_button.png" class="LC_icon" />'.
'</a>';
}
$metainfo .= '<a href="/adm/evaluate?postdata='.
&escape($esrc).
'" target="LONcatInfo">'.
'<img src="/adm/lonMisc/eval_button.png" class="LC_icon" />'.
'</a>';
if (($hash->{'src_'.$rid}=~/\.(problem|exam|quiz|assess|survey|form)$/) &&
($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
$metainfo.=
'<a href="/adm/grades?symb='.&escape($symb).
# '&command=submission" target="LONcatInfo">'.
'&command=submission">'.
'<img src="/adm/lonMisc/subm_button.png" class="LC_icon" />'.
'</a>'.
'<a href="/adm/grades?symb='.&escape($symb).
# '&command=gradingmenu" target="LONcatInfo">'.
'&command=gradingmenu">'.
'<img src="/adm/lonMisc/pgrd_button.png" class="LC_icon" />'.
'</a>';
}
if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
$metainfo.=
'<a href="/adm/parmset?symb='.&escape($symb).
# '" target="LONcatInfo">'.
'" >'.
'<img src="/adm/lonMisc/pprm_button.png" class="LC_icon" />'.
'</a>';
}
}
return $metainfo;
}
1;
__END__
=head1 NAME
Apache::lonpage - Page Handler
=head1 SYNOPSIS
Invoked by /etc/httpd/conf/srm.conf:
<LocationMatch "^/res/.*\.page$>
SetHandler perl-script
PerlHandler Apache::lonpage
</LocationMatch>
=head1 INTRODUCTION
This module renders a .page resource.
This is part of the LearningOnline Network with CAPA project
described at http://www.lon-capa.org.
=head1 HANDLER SUBROUTINE
This routine is called by Apache and mod_perl.
=over 4
=item *
set document type for header only
=item *
tie db file
=item *
render page
=item *
add to symb list
=item *
page parms
=item *
Get SSI output, post parameters
=item *
SSI cell rendering
=item *
Deal with Applet codebases
=item *
Build page
=item *
send headers
=item *
start body
=item *
start form
=item *
start table
=item *
submit element, etc, render page, untie hash
=back
=head1 OTHER SUBROUTINES
=over 4
=item *
euclid() : Euclid's method for determining the greatest common denominator.
=item *
tracetable() : Build page table.
=back
=cut
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