File:
[LON-CAPA] /
rat /
lonpage.pm
Revision
1.40:
download - view:
text,
annotated -
select for diffs
Thu Jun 20 17:47:35 2002 UTC (22 years, 10 months ago) by
sakharuk
Branches:
MAIN
CVS tags:
HEAD
can print pages, but 1. somebody needs to define the width of minipage
inside the table (corresponds to HTML table) 2. if the table is sufficiently
large somebody has to split the table. Now I am trying to resolve these
problems.
# The LearningOnline Network with CAPA
# Page Handler
#
# $Id: lonpage.pm,v 1.40 2002/06/20 17:47:35 sakharuk 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/
#
# (TeX Content Handler
#
# YEAR=2000
# 05/29/00,05/30 Gerd Kortemeyer)
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
# 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16,
# YEAR=2001
# 08/13/01,08/30,10/1 Gerd Kortemeyer
# 12/16 Scott Harrison
# YEAR=2002
# 03/19 Gerd Kortemeyer
#
###
package Apache::lonpage;
use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet();
use Apache::loncommon();
use Apache::lonxml();
use HTML::TokeParser;
use GDBM_File;
use Apache::lonsequence;
# -------------------------------------------------------------- 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;
unless ($beenhere=~/\&$rid\&/) {
$beenhere.=$rid.'&';
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.'&');
$sofar++;
if ($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'}) {
$r->content_type('text/xml');
} else {
$r->content_type('text/html');
}
$r->send_http_header;
return OK;
}
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['forceselect','launch']);
my $requrl=$r->uri;
my $target = $ENV{'form.grade_target'};
# ----------------------------------------------------------------- Tie db file
if (($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,'&'.$lastres.'&');
if ($hash{'src_'.$lastres}) {
my $brepriv=
&Apache::lonnet::allowed('bre',$hash{'src_'.$lastres});
if (($brepriv eq '2') || ($brepriv eq 'F')) {
$rows[$#rows+1]=''.$lastres;
}
}
# ------------------------------------------------------------ Add to symb list
my $i;
my %symbhash=();
for ($i=0;$i<=$#rows;$i++) {
if ($rows[$i]) {
my @colcont=split(/\&/,$rows[$i]);
foreach (@colcont) {
$symbhash{$hash{'src_'.$_}}='';
}
}
}
&Apache::lonnet::symblist($requrl,%symbhash);
# ------------------------------------------------------------------ Page parms
my $number_of_columns = 1;
my $j;
my $lcm=1;
my $contents=0;
my $nforms=0;
my %ssibody=();
my %ssibgcolor=();
my %ssitext=();
my %ssilink=();
my %ssivlink=();
my %ssialink=();
my %metalink=();
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_'.$_};
$src=~/\.(\w+)$/;
$metalink{$_}=$src.'.meta';
$cellemb{$_}=Apache::loncommon::fileembstyle($1);
if ($cellemb{$_} eq 'ssi') {
# --------------------------------------------------------- This is an SSI cell
my $prefix=$_.'_';
my %posthash=('request.prefix' => $prefix);
if (($ENV{'form.'.$prefix.'submit'})
|| ($ENV{'form.all_submit'})) {
foreach (keys %ENV) {
if ($_=~/^form.$prefix/) {
my $name=$_;
$name=~s/^form.$prefix//;
$posthash{$name}=$ENV{$_};
}
}
}
my $output=Apache::lonnet::ssi($src,%posthash);
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;
$output=~
s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([\w\.\:]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
}
$thisdir=~s/\/[^\/]*$//;
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;
$ssibody{$_}=$output;
# ---------------------------------------------------------------- End SSI cell
}
}
}
}
unless ($contents) {
$r->content_type('text/html');
$r->send_http_header;
$r->print('<html><body>Empty page.</body></html>');
} else {
# ------------------------------------------------------------------ Build page
# ---------------------------------------------------------------- Send headers
unless ($target eq 'tex') {
if ($isxml) {
$r->content_type('text/xml');
$r->send_http_header;
$r->print($xmlheader);
} else {
$r->content_type('text/html');
$r->send_http_header;
$r->print('<html>');
}
# ------------------------------------------------------------------------ Head
$r->print("\n<head>\n".$allmeta);
$allscript=~
s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
if ($allscript) {
$r->print("\n<script language='JavaScript'>\n".
$allscript."\n</script>\n");
}
$r->print(&Apache::lonxml::registerurl(1,undef));
$r->print("\n</head>\n");
# ------------------------------------------------------------------ Start body
if ($isxml) {
$r->print($xmlbody);
} else {
$r->print('<body bgcolor="#FFFFFF" onLoad="'.&Apache::lonxml::loadevents.'" onUnload="'.&Apache::lonxml::unloadevents.'">');
}
# ------------------------------------------------------------------ Start form
if ($nforms) {
$r->print('<form method="post" action="'.
$requrl.'">');
}
} else {
$r->print('\documentclass[letterpaper]{article}
\newcommand{\keephidden}[1]{}
\usepackage[dvips]{graphicx}
\usepackage{epsfig}
\usepackage{calc}
\begin{document}');
}
# ----------------------------------------------------------------- Start table
if ($target eq 'tex') {
$r->print('\begin{tabular}INSERT');
} else {
$r->print('<table cols="'.$lcm.'" border="0">');
}
for ($i=0;$i<=$#rows;$i++) {
if ($rows[$i]) {
unless ($target eq 'tex') {
$r->print("\n<tr>");
}
my @colcont=split(/\&/,$rows[$i]);
my $avespan=$lcm/($#colcont+1);
for ($j=0;$j<=$#colcont;$j++) {
my $rid=$colcont[$j];
my $metainfo='<a href="'.
$metalink{$rid}.'" target="LONcatInfo">'.
'<img src="/adm/lonMisc/cat_button.gif" border=0>'.
'</img></a><a href="/adm/evaluate?postdata='.
&Apache::lonnet::escape(&Apache::lonnet::declutter($hash{'src_'.$rid}))
.'" target="LONcatInfo">'.
'<img src="/adm/lonMisc/eval_button.gif" border=0>'.
'</img></a>';
if (
($hash{'src_'.$rid}=~/\.(problem|exam|quiz|assess|survey|form)$/) &&
(&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'}))) {
my ($mapid,$resid)=split(/\./,$rid);
my $symb=
&Apache::lonnet::declutter($hash{'map_id_'.$mapid}).
'___'.$resid.'___'.
&Apache::lonnet::declutter($hash{'src_'.$rid});
$metainfo.=
'<a href="/adm/grades?symb='.&Apache::lonnet::escape($symb).
'&command=submission" target="LONcatInfo">'.
'<img src="/adm/lonMisc/subm_button.gif" border=0>'.
'</img></a>'.
'<a href="/adm/grades?symb='.&Apache::lonnet::escape($symb).
'&command=gradingmenu" target="LONcatInfo">'.
'<img src="/adm/lonMisc/pgrd_button.gif" border=0>'.
'</img></a>'.
'<a href="/adm/parmset?symb='.&Apache::lonnet::escape($symb).
'" target="LONcatInfo">'.
'<img src="/adm/lonMisc/pprm_button.gif" border=0>'.
'</img></a>';
}
$metainfo.='<br></br>';
unless ($target eq 'tex') {
$r->print('<td colspan="'.$avespan.'"');
}
if ($cellemb{$rid} eq 'ssi') {
unless ($target eq 'tex') {
if ($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') {
$r->print('</font>');
}
} elsif ($cellemb{$rid} eq 'img') {
$r->print('>'.$metainfo.'<img src="'.
$hash{'src_'.$rid}.'"></img>');
} elsif ($cellemb{$rid} eq 'emb') {
$r->print('>'.$metainfo.'<embed src="'.
$hash{'src_'.$rid}.'"></embed>');
}
unless ($target eq 'tex') {
$r->print('</td>');
} else {
$number_of_columns++;
$r->print(' & ');
}
}
unless ($target eq 'tex') {
$r->print('</tr>');
} else {
$number_of_columns = 1;
$r->print('REMOVE\\\\');
}
}
}
unless ($target eq 'tex') {
$r->print("\n</table>");
} else {
$r->print('\end{tabular}');
}
# ---------------------------------------------------------------- Submit, etc.
if ($nforms) {
$r->print(
'<input name="all_submit" value="Submit All" type="'.
(($nforms>1)?'submit':'hidden').'"></input></form>');
}
unless ($target eq 'tex') {
$r->print('</body>'.&Apache::lonxml::xmlend());
} else {
$r->print('\end{document}'.$number_of_columns);
}
# -------------------------------------------------------------------- End page
}
# ------------------------------------------------------------- End render page
} else {
$r->content_type('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
}
}
}
$r->content_type('text/html');
$r->send_http_header;
&Apache::lonsequence::viewmap($r,$requrl);
return OK;
}
1;
__END__
=head1 NAME
Apache::lonpage - Page Handler
=head1 SYNOPSIS
Invoked by /etc/httpd/conf/srm.conf:
<LocationMatch "^/res/.*\.page$>
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
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonpage.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / rat