--- rat/lonpage.pm 2000/08/30 11:10:23 1.1 +++ rat/lonpage.pm 2023/09/11 13:26:26 1.144 @@ -1,52 +1,1003 @@ # The LearningOnline Network with CAPA # Page Handler # -# (TeX Content Handler +# $Id: lonpage.pm,v 1.144 2023/09/11 13:26:26 raeburn Exp $ # -# 05/29/00,05/30 Gerd Kortemeyer) -# 08/30 Gerd Kortemeyer +# 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::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 $r=shift; -# ----------------------------------------------------------- Set document type +# ------------------------------------------- Set document type for header only - if ($ENV{'browser.mathml'}) { - $r->content_type('text/xml'); - } else { - $r->content_type('text/html'); - } - $r->send_http_header; - - return OK if $r->header_only; + if ($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'}; - my $requrl=$r->uri; +# 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'}) { - my $fn=$ENV{'request.course.fn'}; + if (($env{'request.course.fn'}) && (!$env{'form.forceselect'})) { + my $fn=$env{'request.course.fn'}; if (-e "$fn.db") { - my %hash; - if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT,0640)) { + 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 - $r->print("

All is cool.

"); + @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; + } + $ssibody{$_} = <No iframe support! +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); + $output=~s|//(\s*)?\s||gs; + if (($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*)+)\]*\>/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].''; + } 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=~/\]*\>(.*)/si) { + $output=$1; + } + $output=~s/\<\/body\>.*//si; + if ($output=~/\
]*\>//gsi; + $output=~s/\<\/form[^\>]*\>//gsi; + if ($output=~/\]+name\s*=\s*[\'\"]*HWFILE/) { + $nuploads++; + } + if ($output=~/\]+name\s*=\s*[\'\"]*accessbutton/) { + $ntimers++; + $hastimer = 1; + } + unless ($hasnumresp) { + if ($output=~/\]+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