# The LearningOnline Network with CAPA
# Page Handler
#
# $Id: lonpage.pm,v 1.144 2023/09/11 13:26:26 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::lonhtmlcommon;
use Apache::lonxml();
use Apache::lonlocal;
use Apache::lonmenu;
use Apache::lonhomework;
use Apache::lonparmset;
use Apache::lonenc();
use HTML::TokeParser;
use HTML::Entities();
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_'.$rid}) {
my ($mapid,$resid)=split(/\./,$rid);
my $symb = &Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$hash{'src_'.$rid});
my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid},$symb);
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") {
my %buttonshide;
my $hostname = $r->hostname();
my $lonhost = $r->dir_config('lonHostID');
my $ip = &Apache::lonnet::get_host_ip($lonhost);
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)) {
# ------------------------------------------------------------- Countdown Timer
my $now = time;
my ($pagefirstaccess,%hastimeleft,%countdowndisp,%donebutton,
%donebtnextra,%buttonbytime,$donetime,$symbtosetdone);
my ($pagesymb,$courseid,$domain,$name)=&Apache::lonnet::whichuser();
unless ($pagesymb) {
$pagesymb=&Apache::lonnet::symbread($requrl);
}
if ($pagesymb && ($courseid ne '') && ($domain ne '') && ($name ne '')) {
my %times=&Apache::lonnet::get('firstaccesstimes',
[$courseid."\0".$pagesymb],
$domain,$name);
if ($times{$courseid."\0".$pagesymb} =~ /^\d+$/) {
$pagefirstaccess = $times{$courseid."\0".$pagesymb};
if ($pagefirstaccess && $env{'form.LC_interval_done'} eq 'true') {
$donetime = $now - $pagefirstaccess;
}
}
}
# ----------------------------------------------------------------- Render page
@rows=();
&tracetable(0,$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];
if (($donetime) && ($symbtosetdone eq '')) {
my $src = $hash{'src_'.$rid};
if ($hash{'encrypted_'.$rid}) {
$src=&Apache::lonenc::encrypted($src);
}
my ($mapid,$resid)=split(/\./,$rid);
my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$src);
if ($src =~ /$LONCAPA::assess_re/) {
my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
if (@interval > 1) {
if (($interval[1] eq 'map') && ($pagefirstaccess)) {
my ($timelimit) = ($interval[0] =~ /^(\d+)/);
if ($timelimit) {
if ($pagefirstaccess + $timelimit > $now) {
$symbtosetdone = $symb;
}
}
}
}
}
}
}
}
}
&Apache::lonnet::symblist($requrl,%symbhash);
# ------------------------------------------------------------------ Page parms
my $j;
my $lcm=1;
my $contents=0;
my $nforms=0;
my $nuploads=0;
my $ntimers=0;
my $hasnumresp;
my %turninpaths;
my %multiresps;
my $turninparent;
my %ssibody=();
my %ssibgcolor=();
my %ssitext=();
my %ssilink=();
my %ssivlink=();
my %ssialink=();
my %cssrefs=();
my %httpref=();
my %cellemb=();
my %cellexternal=();
my $allscript='';
my $allmeta='';
my $isxml=0;
my $xmlheader='';
my $xmlbody='';
# ---------------------------------------------------------- Handle Done button
# Set the event timer to zero if the "done button" was clicked.
if ($donetime && $symbtosetdone) {
&Apache::lonparmset::storeparm_by_symb_inner($symbtosetdone,'0_interval',
2,$donetime,'date_interval',
$name,$domain);
undef($env{'form.LC_interval_done'});
}
# --------------------------------------------- Get SSI output, post parameters
for ($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 $plainsrc = $src;
my $anchor;
if ($hash{'ext_'.$_} eq 'true:') {
$cellexternal{$_}=($hash{'ext_'.$_} eq 'true:');
$src =~ s{^/ext/}{http://};
$src =~ s{http://https://}{https://};
if ($src =~ /(\#[^#]+)$/) {
$anchor = $1;
$src =~ s/\#[^#]+$//;
}
}
my $unencsrc = $src;
my ($extension)=($src=~/\.(\w+)$/);
if ($hash{'encrypted_'.$_}) {
$src=&Apache::lonenc::encrypted($src);
}
my ($mapid,$resid)=split(/\./,$_);
my $symb=&Apache::lonnet::encode_symb($hash{'map_id_'.$mapid},$resid,$plainsrc);
unless ($env{'request.role.adv'}) {
$buttonshide{$symb} = &Apache::lonnet::EXT("resource.0.buttonshide",$symb);
}
$cellemb{$_}=
&Apache::loncommon::fileembstyle($extension);
if ($cellexternal{$_}) {
if (($target eq 'tex') || ($target eq 'tex_answer')) {
my $shown = $src.$anchor;
if (($hash{'encrypted_'.$_}) && (!$env{'request.role.adv'})) {
$shown = &mt('URL not shown (encrypted)');
}
my $title=&Apache::lonnet::gettitle($symb);
$title = &Apache::lonxml::latex_special_symbols($title);
$shown = &Apache::lonxml::latex_special_symbols($shown);
$ssibody{$_} = ' \strut \\\\ \textit{'.$title.'} \strut \\\\ '.$shown.'\\\\';
} else {
my $showsrc = $src;
my ($is_pdf,$title,$linktext);
if ($unencsrc =~ /\.pdf$/i) {
$is_pdf = 1;
}
if (($hash{'encrypted_'.$_}) && ($symb)) {
$title=&Apache::lonnet::gettitle(&Apache::lonenc::encrypted($symb));
} else {
$title=&Apache::lonnet::gettitle($symb);
}
if ($env{'browser.mobile'}) {
if ($is_pdf) {
$linktext = &mt('Link to PDF (for mobile devices)');
$ssibody{$_} = &create_extlink($unencsrc,$anchor,$title,$linktext);
} else {
$linktext = &mt('Link to resource');
$ssibody{$_} = &create_extlink($unencsrc,$anchor,$title,$linktext);
}
} else {
my $absolute = $env{'request.use_absolute'};
my $uselink = &Apache::loncommon::is_nonframeable($unencsrc,$absolute,$hostname,$ip);
if (($uselink) || (($ENV{'SERVER_PORT'} == 443) && ($unencsrc =~ m{^http://}))) {
$linktext = &mt('Link to resource');
$ssibody{$_} = &create_extlink($unencsrc,$anchor,$title,$linktext);
} else {
if (($hash{'encrypted_'.$_}) && ($symb) && (!$env{'request.role.adv'})) {
$showsrc .= '?symb='.&Apache::lonenc::encrypted($symb);
} elsif ($anchor) {
$showsrc .= $anchor;
}
$ssibody{$_} = <<ENDEXT;
<iframe src="$showsrc" width="100%" height="300px">No iframe support!</iframe>
ENDEXT
}
}
}
} elsif ($cellemb{$_} eq 'ssi') {
# --------------------------------------------------------- This is an SSI cell
my $prefix='p_'.$_.'_';
my $idprefix= 'p_'.join('_',($mapid,$resid,''));
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 $submitted=$env{'form.all_submit_pressed'};
if (!$submitted) {
foreach my $key (keys(%env)) {
if ($key=~/^\Qform.$prefix\Esubmit_(.+)_pressed$/) {
if ($env{$key}) {
$submitted=1;
last;
}
}
}
}
if ($submitted) {
foreach my $key (keys(%env)) {
if ($key=~/^\Qform.$prefix\E/) {
my $name=$key;
$name=~s/^\Qform.$prefix\E//;
$posthash{$name}=$env{$key};
}
}
if ($env{'form.all_submit_pressed'}) {
$posthash{'all_submit'}='yes';
}
} elsif ($env{'form.'.$prefix.'markaccess'} eq 'yes') {
$posthash{'markaccess'} = $env{'form.'.$prefix.'markaccess'};
}
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 $matheditor;
if ($output =~ /\Qjavascript:LC_mathedit_HWVAL_\E/) {
$matheditor = 'dragmath';
} elsif ($output =~ /LCmathField/) {
$matheditor = 'lcmath';
}
my $parser=HTML::TokeParser->new(\$output);
my $token;
my $thisdir=$src;
my $bodydef=0;
my $thisxml=0;
my @rlinks=();
my @css_hrefs=();
if ($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');
} elsif (($token->[1] eq 'link') &&
($bodydef==0)) {
if (($token->[2]->{'href'} !~ m{^/adm/}) &&
($token->[2]->{'rel'} eq 'stylesheet')) {
$css_hrefs[$#css_hrefs+1]=
$token->[2]->{'href'};
}
}
}
}
if ($output=~/\<body[^\>]*\>(.*)/si) {
$output=$1;
}
$output=~s/\<\/body\>.*//si;
if ($output=~/\<form/si) {
my $hastimer;
$nforms++;
$output=~s/\<form[^\>]*\>//gsi;
$output=~s/\<\/form[^\>]*\>//gsi;
if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*HWFILE/) {
$nuploads++;
}
if ($output=~/\<input[^\>]+name\s*=\s*[\'\"]*accessbutton/) {
$ntimers++;
$hastimer = 1;
}
unless ($hasnumresp) {
if ($output=~/\<input[^\>]+class\s*=\s*['"]*[^'">]*LC_numresponse_text\W/) {
$hasnumresp = 1;
}
}
$output=~
s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi;
$output=~
s/\<((?:input|select|button|textarea)[^\>]+)id\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 id="$idprefix$2" $3\>/gsi;
$output=~
s/(\Qthis.form.elements['\E)(HW(?:VAL|CHK)_[^']+\'\]\.(?:value=\'|checked))/$1$prefix$2/gsi;
if ($hastimer) {
$output=~
s/\<(input[^\>]+name=\Q"$prefix\Eaccessbutton"[^\>]+)(?:\Qdocument.markaccess.submit();\E)([^\>]*)\>/\<$1pageTimer(this.form,'$prefix')$2\>/gsi;
$output=~ s/\<(input[^\>]+name=\Q"$prefix\Emarkaccess"[^\>]+value=["'])(?:yes)(['"][^\>]*)\>/\<$1$2\>/gsi;
}
if ($matheditor eq 'dragmath') {
$output=~
s/(\Qjavascript:LC_mathedit_\E)(HWVAL_)([^'"]+?)(\(['"]*)(\QHWVAL_\E\3['"]\)\;void\(0\)\;)/$1$idprefix$2$3$4$idprefix$5/g;
$output=~
s/(function\s+LC_mathedit_)(HWVAL_)([^'"]+?)(\s+\(LCtextline\))/$1$idprefix$2$3$4/g;
} elsif ($matheditor eq 'lcmath') {
$output=~
s/(var\s+LCmathField\s+=\s+document\.getElementById\(['"])([^'"]+?)(['"]\)\;)/$1$idprefix$2$3/g;
}
$output=~
s/(\Q<div id="msg_\E)(\Qsubmit_\E)([^"]*)(\Q" style="display:none">\E)/<input type="hidden" name="$prefix$2$3_pressed" id="$idprefix$2$3_pressed" value="" \/>$1$idprefix$2$3$4/g;
$output=~
s/(\Q<td class="LC_status_\E)(\Qsubmit_\E)([^\"]*)(\s*[^\"]*"\>)/$1$idprefix$2$3$4/g;
if ($nuploads) {
($turninpaths{$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;
$output=~
s/\<(input[^\>]+\Qonfocus=\"javascript:disableAutoComplete\E)\(\'([^\']+)\'\)(;\")/\<$1('$idprefix$2')$3/gsi;
unless ($hastimer) {
if ($plainsrc =~ /$LONCAPA::assess_re/) {
%Apache::lonhomework::history =
&Apache::lonnet::restore($symb,$courseid,$domain,$name);
my $type = 'problem';
if ($extension eq 'task') {
$type = 'Task';
}
my ($status,$accessmsg,$slot_name,$slot) =
&Apache::lonhomework::check_slot_access('0',$type,$symb);
undef(%Apache::lonhomework::history);
my $probstatus = &Apache::lonnet::EXT("resource.0.problemstatus",$symb);
if (($status eq 'CAN_ANSWER') || (($status eq 'CANNOT_ANSWER') &&
(($probstatus eq 'no') || ($probstatus eq 'no_feedback_ever'))) ||
(($status eq 'NOT_YET_VIEWED') && ($posthash{'markaccess'} eq 'yes'))) {
my ($slothastime,$timerhastime);
if ($slot_name ne '') {
if (ref($slot) eq 'HASH') {
if (($slot->{'starttime'} < $now) &&
($slot->{'endtime'} > $now)) {
$slothastime = $now - $slot->{'endtime'};
}
}
}
my $duedate = &Apache::lonnet::EXT("resource.0.duedate",$symb);
my @interval=&Apache::lonnet::EXT("resource.0.interval",$symb);
if (@interval > 1) {
my $first_access;
if ($interval[1] eq 'map') {
my $ignorecache;
if ($env{'form.'.$prefix.'markaccess'} eq 'yes') {
$ignorecache = 1;
}
$first_access=&Apache::lonnet::get_first_access($interval[1],undef,$pagesymb,$ignorecache);
if (($first_access) && (!$pagefirstaccess)) {
$pagefirstaccess = $first_access;
}
} else {
$first_access=&Apache::lonnet::get_first_access($interval[1],$symb);
}
if ($first_access > 0) {
my ($timelimit) = ($interval[0] =~ /^(\d+)/);
if ($timelimit) {
my $timeremains = $timelimit + $first_access - $now;
if ($timeremains > 0) {
$timerhastime = $timeremains;
}
}
}
}
if (($duedate && $duedate > $now) ||
(!$duedate && $timerhastime > 0) ||
($slot_name ne '' && $slothastime)) {
if ((@interval > 1 && $timerhastime) ||
($type eq 'Task' && $slothastime)) {
$countdowndisp{$symb} = 'inline';
if ((@interval > 1) && ($timerhastime)) {
$hastimeleft{$symb} = $timerhastime;
if ($pagefirstaccess) {
my ($timelimit,$usesdone,$donebuttontext,$proctor,$secret);
($timelimit,my $donesuffix) = split(/_/,$interval[0],2);
if ($donesuffix =~ /^done\:([^\:]+)\:(.*)$/) {
$usesdone = 'done';
$donebuttontext = $1;
(undef,$proctor,$secret) = split(/_/,$2);
} elsif ($donesuffix =~ /^done(|_.+)$/) {
$donebuttontext = &mt('Done');
($usesdone,$proctor,$secret) = split(/_/,$donesuffix);
}
if ($usesdone eq 'done') {
$donebutton{$symb} = $timelimit;
push(@{$buttonbytime{$timelimit}},$symb);
$donebtnextra{$symb} = {
text => $donebuttontext,
proctor => $proctor,
secret => $secret,
type => $interval[1],
};
}
}
} else {
$hastimeleft{$symb} = $slothastime;
}
} else {
$hastimeleft{$symb} = $duedate - $now;
$countdowndisp{$symb} = 'none';
}
unless ($donebutton{$symb}) {
$donebutton{$symb} = 0;
}
}
}
}
}
}
$thisdir=~s/\/[^\/]*$//;
foreach (@rlinks) {
unless (($_=~/^https?\:\/\//i) ||
($_=~/^\//) ||
($_=~/^javascript:/i) ||
($_=~/^mailto:/i) ||
($_=~/^\#/)) {
my $newlocation=
&Apache::lonnet::hreflocation($thisdir,$_);
$output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
}
}
foreach my $css_href (@css_hrefs) {
next if ($css_href eq '');
unless ($css_href =~ m{https?://}) {
my $proburl = &Apache::lonnet::clutter($plainsrc);
unless ($css_href =~ m{^/}) {
my $probdir = $proburl;
$probdir=~s/\/[^\/]*$//;
$css_href = &Apache::lonnet::hreflocation($probdir,$css_href);
}
if ($css_href =~ m{^/(res|uploaded)/}) {
unless (($env{'httpref.'.$css_href}) ||
($httpref{'httpref.'.$css_href}) ||
(&Apache::lonnet::is_on_map($css_href))) {
if ($env{'httpref.'.$proburl}) {
$proburl = $env{'httpref.'.$proburl};
}
$httpref{'httpref.'.$css_href} = $proburl;
}
}
}
$cssrefs{$css_href} = 1;
}
# -------------------------------------------------- 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)) {
$allscript .= &Apache::lonhtmlcommon::file_submissionchk_js(\%turninpaths,\%multiresps).
'<script type="text/javascript" '.
'src="/res/adm/includes/file_upload.js"></script>';
}
if (($nforms) && (&Apache::lonhtmlcommon::htmlareabrowser())) {
my %textarea_args = (
dragmath => 'math',
);
$allscript .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
}
if ($ntimers) {
$allscript .= '<script type="text/javascript">'."\n".
'// <![CDATA['."\n".
'function pageTimer(form,prefix) {'."\n".
" form.elements[prefix+'markaccess'].value = 'yes';\n".
" form.submit();\n".
'}'."\n".
'// ]]>'.
"\n</script>\n";
}
&Apache::lonhtmlcommon::clear_breadcrumb_tools();
if (keys(%hastimeleft)) {
my (%uniquetimes,%uniquedisplays);
foreach my $item (values(%hastimeleft)) {
if (exists($uniquetimes{$item})) {
$uniquetimes{$item} ++;
} else {
$uniquetimes{$item} = 1;
}
}
if (scalar(keys(%uniquetimes)) == 1) {
my (%uniquedisplays,%uniquedones,$currdisp,$donebuttontime,
$donebuttonextras);
if (keys(%countdowndisp)) {
foreach my $item (values(%countdowndisp)) {
if (exists($uniquedisplays{$item})) {
$uniquedisplays{$item} ++;
} else {
$uniquedisplays{$item} = 1;
}
}
my @countdowndisplay = keys(%uniquedisplays);
if (scalar(@countdowndisplay) == 1) {
$currdisp = $countdowndisplay[0];
}
}
if (keys(%donebutton)) {
foreach my $item (values(%donebutton)) {
if (exists($uniquedones{$item})) {
$uniquedones{$item} ++;
} else {
$uniquedones{$item} = 1;
}
}
my @donebuttons = sort { $ <=> $b } (keys(%uniquedones));
if (scalar(@donebuttons) == 1) {
if ($donebuttons[0]) {
$donebuttontime = $donebuttons[0];
if (ref($buttonbytime{$donebuttontime}) eq 'ARRAY') {
$donebuttonextras = $donebtnextra{$buttonbytime{$donebuttontime}->[0]};
}
}
}
}
&add_countdown_timer($currdisp,$donebuttontime,$donebuttonextras);
}
}
my $pagebuttonshide;
if (keys(%buttonshide)) {
my %uniquebuttonhide;
foreach my $item (values(%buttonshide)) {
if (exists($uniquebuttonhide{$item})) {
$uniquebuttonhide{$item} ++;
} else {
$uniquebuttonhide{$item} = 1;
}
}
if (keys(%uniquebuttonhide) == 1) {
if (lc((keys(%uniquebuttonhide))[0]) eq 'yes') {
$pagebuttonshide = 'yes';
}
}
}
if (keys(%cssrefs)) {
my $links;
if (keys(%cssrefs)) {
foreach my $css_href (keys(%cssrefs)) {
next unless ($css_href =~ m{^(/res/|/uploaded/|https?://)});
$links .= '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />'."\n";
}
}
if ($links) {
if (keys(%httpref)) {
&Apache::lonnet::appenv(\%httpref);
}
$allscript .= "\n$links";
}
}
# ------------------------------------------------------------------ Start body
$r->print(&Apache::loncommon::start_page(undef,$allscript,
{'force_register' => 1,
'bgcolor' => '#ffffff',
'hide_buttons' => $pagebuttonshide}));
# ------------------------------------------------------------------ Start form
if ($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)
.'" id="LC_page">';
$r->print($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,\%buttonshide,$hostname).'<br />';
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
$r->print('<td colspan="'.$avespan.'"');
}
if (($cellemb{$rid} eq 'ssi') || ($cellexternal{$rid})) {
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 />');
unless ($cellemb{$rid} eq 'wrp') {
$r->print(&mt('It is recommended that you use an up-to-date virus scanner before handling this file.'));
}
$r->print('</p><p><table>'.
&Apache::londocs::entryline(0,
&mt("Click to download or use your browser's Save Link function"),
'/'.&Apache::lonnet::declutter($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) {
my $class;
if ($nforms > 1) {
$class = ' class="LC_hwk_submit"';
if ($ntimers) {
$nforms = 1;
$class = '';
}
}
$r->print(
'<input name="all_submit" value="'.&mt('Submit All').'" type="'.
(($nforms>1)?'submit':'hidden').'"'.$class.' id="all_submit" />'.
'<input type="hidden" name="all_submit_pressed" '.
'id="all_submit_pressed" value="" />'.
'<div id="msg_all_submit" style="display:none">'.
&mt('Processing your submission ...').'</div></form>');
}
unless (($target eq 'tex') || ($target eq 'tex_answer')) {
my $args = {'discussion' => 1};
if ($hasnumresp) {
$args->{'dashjs'} = 1;
}
$r->print(&Apache::loncommon::end_page($args));
} 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,$id]);
# -------------------------------------------------------------------- End page
}
# ------------------------------------------------------------- End render page
} else {
if ($hash{'map_type_'.$hash{'map_pc_'.$requrl}} eq 'none') {
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
$r->print(&Apache::loncommon::start_page(undef,undef,
{'force_register' => 1,}));
my $crstype = &Apache::loncommon::course_type();
if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
$r->print('<span class="LC_warning">'.&mt('Missing composite page file.').'</span><br />'.
&mt("You may want to use the $crstype Editor to remove this item."));
} else {
if ($crstype eq 'Placement') {
$r->print('<span class="LC_warning">'.&mt('Missing page').'</span>');
} else {
$r->print('<span class="LC_info">'.
&mt('This resource was unavailable when your '.lc($crstype).' session was loaded').'<br />'.
&mt("Please use 'Contents' to list items available in the $crstype.").'</span>');
}
}
$r->print(&Apache::loncommon::end_page());
} else {
&Apache::loncommon::content_type($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,$rid,$buttonshide,$hostname) = @_;
my ($mapid,$resid)=split(/\./,$rid);
my $symb=&Apache::lonnet::encode_symb($hash->{'map_id_'.$mapid},
$resid,
$hash->{'src_'.$rid});
my ($aname,$shownsymb);
if (($hash->{'encrypted_'.$rid}) && (!$env{'request.role.adv'})) {
$aname = 'LC_'.$rid;
$shownsymb = &Apache::lonenc::encrypted($symb);
} else {
$shownsymb = $symb;
my $dispsymb = $symb;
if ($symb =~ /\#([^\#]+)$/) {
my $escan = &escape('#');
$dispsymb =~ s/#([^\#]+)$/$escan$1/;
}
$aname = &escape($dispsymb);
}
my $metainfo = '<a name="'.$aname.'"></a>';
unless ($env{'request.role.adv'}) {
if ($buttonshide->{$symb} eq 'yes') {
return $metainfo;
}
}
my $crs_sec = $env{'request.course.id'} . (($env{'request.course.sec'} ne '')
? "/$env{'request.course.sec'}"
: '');
my $esrc=&Apache::lonnet::declutter($hash->{'src_'.$rid});
if ($hash->{'encrypted_'.$rid}) {
$esrc=&Apache::lonenc::encrypted($esrc);
}
if ($hash->{'src_'.$rid} !~ m-^/uploaded/-
&& $hash->{'src_'.$rid} !~ m{^/ext/}
&& !$env{'request.enc'}
&& ($env{'request.role.adv'}
|| !$hash->{'encrypted_'.$rid})) {
$metainfo .= '<a href="'.$hash->{'src_'.$rid}.'.meta'.'" '.
'target="LONcatInfo">'.
'<img src="/res/adm/pages/catalog.png" class="LC_icon"'.
' alt="'.&mt('Show Metadata').'"'.
' title="'.&mt('Show Metadata').'" />'.
'</a>';
}
if (($hash->{'src_'.$rid} !~ m{^/uploaded/}) &&
($hash->{'src_'.$rid} !~ m{^/ext/})) {
$metainfo .= '<a href="/adm/evaluate?postdata='.
&escape($esrc).
'" target="LONcatInfo">'.
'<img src="/res/adm/pages/eval.png" class="LC_icon"'.
' alt="'.&mt('Provide my evaluation of this resource').'"'.
' title="'.&mt('Provide my evaluation of this resource').'" />'.
'</a>';
}
if (($hash->{'src_'.$rid}=~/$LONCAPA::assess_re/) &&
($hash->{'src_'.$rid} !~ m-^/uploaded/-)) {
if ((&Apache::lonnet::allowed('mgr',$crs_sec)) ||
(&Apache::lonnet::allowed('vgr',$crs_sec))) {
$metainfo.=
'<a href="/adm/grades?symb='.&escape($symb).
# '&command=submission" target="LONcatInfo">'.
'&command=submission">'.
'<img src="/adm/lonMisc/subm_button.png" class="LC_icon"'.
' alt="'.&mt('View Submissions for a Student or a Group of Students').'"'.
' title="'.&mt('View Submissions for a Student or a Group of Students').'" />'.
'</a>';
}
if (&Apache::lonnet::allowed('mgr',$crs_sec)) {
$metainfo.=
'<a href="/adm/grades?symb='.&escape($symb).
# '&command=gradingmenu" target="LONcatInfo">'.
'&command=gradingmenu">'.
'<img src="/res/adm/pages/pgrd.png" class="LC_icon"'.
' alt="'.&mt('Content Grades').'"'.
' title="'.&mt('Content Grades').'" />'.
'</a>';
}
if ((&Apache::lonnet::allowed('opa',$crs_sec)) ||
(&Apache::lonnet::allowed('vpa',$crs_sec))) {
$metainfo.=
'<a href="/adm/parmset?symb='.&escape($symb).
# '" target="LONcatInfo">'.
'" >'.
'<img src="/adm/lonMisc/pprm_button.png" class="LC_icon"'.
' alt="'.&mt('Content Settings').'"'.
' title="'.&mt('Content Settings').'" />'.
'</a>';
}
}
if ($env{'request.course.id'}) {
my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
my $file=&Apache::lonnet::declutter($hash->{'src_'.$rid});
my $editbutton = '';
if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
my ($cfile,$home,$switchserver,$forceedit,$forceview) =
&Apache::lonnet::can_edit_resource($file,$cnum,$cdom,$hash->{'src_'.$rid},$symb);
if ($cfile ne '') {
my $jscall = &Apache::lonhtmlcommon::jump_to_editres($cfile,$home,$switchserver,
$forceedit,1,$symb,$shownsymb,
undef,&escape($env{'form.title'}),
$hostname);
if ($jscall) {
$editbutton = 1;
my $icon = 'pcstr.png';
my $label = &mt('Edit');
my $title = &mt('Edit this resource');
my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
$metainfo .= ' <a href="javascript:'.$jscall.';">'.$pic.'</a>';
}
}
}
if ((!$editbutton) && ($file=~/$LONCAPA::assess_re/)) {
my $url = &Apache::lonnet::clutter($file);
my $viewsrcbutton;
if ((&Apache::lonnet::allowed('cre','/')) &&
(&Apache::lonnet::metadata($url,'sourceavail') eq 'open')) {
$viewsrcbutton = 1;
} elsif (&Apache::lonnet::allowed('vxc',$crs_sec)) {
if ($url =~ m{^\Q/res/$cdom/\E($LONCAPA::match_username)/}) {
my $auname = $1;
if (($env{'request.course.adhocsrcaccess'} ne '') &&
(grep(/^\Q$auname\E$/,split(/,/,$env{'request.course.adhocsrcaccess'})))) {
$viewsrcbutton = 1;
} elsif ((&Apache::lonnet::metadata($url,'sourceavail') eq 'open') &&
(&Apache::lonnet::allowed('bre',$crs_sec))) {
$viewsrcbutton = 1;
}
}
}
if ($viewsrcbutton) {
my $icon = 'pcstr.png';
my $label = &mt('View Source');
my $title = &mt('View source code');
my $jsrid = $rid;
$jsrid =~ s/\./_/g;
my $showurl = &escape(&Apache::lonenc::check_encrypt($url));
my $pic = '<img src="'.&Apache::loncommon::lonhttpdurl('/res/adm/pages/'.$icon).'"'.
' class="LC_icon" alt="'.$label.'" title="'.$title.'" />';
$metainfo .= ' <a href="javascript:open_source_'.$jsrid.'();">'.$pic.'</a>'."\n".
'<script type="text/javascript">'."\n".
"function open_source_$jsrid() {\n".
" sourcewin=window.open('/adm/source?inhibitmenu=yes&viewonly=1&filename=$showurl','LONsource',".
"'height=500,width=600,resizable=yes,location=no,menubar=no,toolbar=no,scrollbars=yes');\n".
"}\n".
"</script>\n";
}
}
}
return $metainfo;
}
sub add_countdown_timer {
my ($currdisp,$donebuttontime,$donebuttonextras) = @_;
my ($collapse,$expand,$alttxt,$title,$donebutton);
if ($currdisp eq 'inline') {
$collapse = '► ';
} else {
$expand = '◄ ';
}
if ($donebuttontime) {
my ($type,$proctor,$donebuttontext);
if (ref($donebuttonextras) eq 'HASH') {
$proctor = $donebuttonextras->{'proctor'};
$donebuttontext = $donebuttonextras->{'text'};
$type = $donebuttonextras->{'type'};
} else {
$donebuttontext = &mt('Done');
$type = 'map';
}
$donebutton =
&Apache::lonmenu::done_button_js($type,'','',$proctor,$donebuttontext);
}
unless ($env{'environment.icons'} eq 'iconsonly') {
$alttxt = &mt('Timer');
$title = $alttxt.' ';
}
my $desc = &mt('Countdown to due date/time');
my $output = <<END;
$donebutton
<a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
<span id="ddcountcollapse" class="LC_menubuttons_inline_text">
$collapse
</span></a>
<span id="duedatecountdown" class="LC_menubuttons_inline_text" style="display: $currdisp;"></span>
<a href="javascript:toggleCountdown();" class="LC_menubuttons_link">
<span id="ddcountexpand" class="LC_menubuttons_inline_text" >$expand</span>
<img src="/res/adm/pages/timer.png" title="$desc" class="LC_icon" alt="$alttxt" /><span class="LC_menubuttons_inline_text">$title</span></a>
END
&Apache::lonhtmlcommon::add_breadcrumb_tool('tools',$output);
return;
}
sub create_extlink {
my ($url,$anchor,$title,$linktext) = @_;
my $shownlink;
unless ($title eq '') {
$shownlink = '<span style="font-weight:bold;">'.$title.'</span><br />';
}
my $dest = &HTML::Entities::encode($url.$anchor,'&<>"');
$shownlink .= '<a href="'.$dest.'">'.$linktext.'</a>';
return $shownlink;
}
1;
__END__
=head1 NAME
Apache::lonpage - Page Handler
=head1 SYNOPSIS
Invoked by /etc/httpd/conf/srm.conf:
<LocationMatch "^/res/.*\.page$>
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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