--- rat/lonpage.pm 2000/09/15 20:03:48 1.5 +++ rat/lonpage.pm 2007/06/22 21:24:54 1.80 @@ -1,92 +1,138 @@ # The LearningOnline Network with CAPA # Page Handler # -# (TeX Content Handler +# $Id: lonpage.pm,v 1.80 2007/06/22 21:24:54 albertel Exp $ # -# 05/29/00,05/30 Gerd Kortemeyer) -# 08/30,08/31,09/06,09/14,09/15 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::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; - -my %ssibody=(); -my %ssibgcolor=(); -my %ssitext=(); -my %ssilink=(); -my %ssivlink=(); -my %ssialink=(); -my %cellemb=(); + +# ------------------------------------------------------------------ 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.'&'; - - 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})) { - map { - my $now=&tracetable($sofar,$hash{'goesto_'.$_},$beenhere); - if ($now>$further) { $further=$now; } - } split(/\,/,$hash{'to_'.$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.'&'); + $sofar++; + if ($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 $further; } -sub cell { - my ($r,$colspan,$rid)=@_; - $r->print('print('>'.$ssibody{$rid}); - } elsif ($cellemb{$rid} eq 'img') { - $r->print('>'); - } - $r->print(''); -} - # ================================================================ Main Handler sub handler { @@ -95,21 +141,31 @@ sub handler { # ------------------------------------------- Set document type for header only if ($r->header_only) { - if ($ENV{'browser.mathml'}) { - $r->content_type('text/xml'); + if ($env{'browser.mathml'}) { + &Apache::loncommon::content_type($r,'text/xml'); } else { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); } $r->send_http_header; return OK; } - - my $requrl=$r->uri; + + &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'}; +# &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 "$fn.db") { - if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_WRCREAT,0640)) { + if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) { # ------------------------------------------------------------------- Hash tied my $firstres=$hash{'map_start_'.$requrl}; my $lastres=$hash{'map_finish_'.$requrl}; @@ -118,85 +174,391 @@ sub handler { @rows=(); - &tracetable(0,$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]=''.$lastres; + &tracetable(0,$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 $i; my $j; - my $maxcols=-1; + 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]); - $maxcols=$#colcont>$maxcols?$#colcont:$maxcols; - map { + $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1)); + foreach (@colcont) { my $src=$hash{'src_'.$_}; - $src=~/\.(\w+)$/; - $cellemb{$_}=Apache::lonnet::fileembstyle($1); + my ($extension)=($src=~/\.(\w+)$/); + if ($hash{'encrypted_'.$_}) { + $src=&Apache::lonenc::encrypted($src); + } + $metalink{$_}=$src.'.meta'; + $cellemb{$_}= + &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' => $prefix); - map { - if ($_=~/^form.$prefix/) { - my $name=$_; - $name=~s/^form.$prefix//; - $posthash{$name}=$ENV{$_}; - } - } keys %ENV; + my %posthash=('request.prefix' => $prefix, + 'LONCAPA_INTERNAL_no_discussion' => 'true', + 'symb' => $symb); + if ($env{'form.grade_target'} 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'}; + } + 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); - + $output=~s|//(\s*)?\s||gs; + if ($target eq 'tex') { + $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*)+)\]*\>/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'); + } + } + } + if ($output=~/\]*\>(.*)/si) { + $output=$1; + } + $output=~s/\<\/body\>.*//si; + if ($output=~/\
]*\>//gsi; + $output=~s/\<\/form[^\>]*\>//gsi; + $output=~ + s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([^\'\"]+)[\'\"]*([^\>]*)\>/\<$1 name="$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/(\]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei; $ssibody{$_}=$output; - # ---------------------------------------------------------------- End SSI cell } - } @colcont; + } } } - if ($maxcols<0) { - $r->content_type('text/html'); + unless ($contents) { + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; - $r->print('Empty page.'); + $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('

'.&mt('Please use the LON-CAPA navigation arrows to move to another item in the course'). + &Apache::loncommon::end_page()); } else { # ------------------------------------------------------------------ Build page - $maxcols++; - $r->content_type('text/html'); - $r->send_http_header; - $r->print(''); - - $r->print(''); + +# ---------------------------------------------------------------- Send headers + unless ($target eq 'tex') { + 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\n"; + } +# ------------------------------------------------------------------ Start body + $r->print(&Apache::loncommon::start_page(undef,undef, + {'force_register' => 1, + 'bgcolor' => '#ffffff',})); +# ------------------------------------------------------------------ Start form + if ($nforms) { + $r->print(''); + } + } elsif ($target eq 'tex') { + $r->print('\documentclass{article} + \newcommand{\keephidden}[1]{} + \usepackage[dvips]{graphicx} + \usepackage{epsfig} + \usepackage{calc} + \usepackage{longtable} + \begin{document}'); + } +# ----------------------------------------------------------------- Start table + if ($target eq 'tex') { + $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead '); + if ($number_of_columns le $lcm) {$number_of_columns=$lcm;}; + } else { + $r->print('
'); + } +# which icons do we use? + my $extension='png'; + if ($env{'environment.icons'} eq 'classic') { $extension='gif'; } +# generate rows for ($i=0;$i<=$#rows;$i++) { if ($rows[$i]) { - $r->print("\n"); + unless ($target eq 'tex') { + $r->print("\n"); + } my @colcont=split(/\&/,$rows[$i]); - my $avespan=int($maxcols/($#colcont+1)); - my $lastspan=$maxcols-$avespan*$#colcont; - for ($j=0;$j<$#colcont;$j++) { - &cell($r,$avespan,$colcont[$j]); + my $avespan=$lcm/($#colcont+1); + for ($j=0;$j<=$#colcont;$j++) { + my $rid=$colcont[$j]; + 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); + } + unless ($hash{'src_'.$rid} =~ m-^/uploaded/-) { + $metainfo =''. + ''. + ''. + ''; + } + $metainfo .= ''. + ''. + ''; + if ( + ($hash{'src_'.$rid}=~/\.(problem|exam|quiz|assess|survey|form)$/) && + (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) && + ($hash{'src_'.$rid} !~ m-^/uploaded/-)) { + my ($mapid,$resid)=split(/\./,$rid); + my $symb= + &Apache::lonnet::declutter($hash{'map_id_'.$mapid}). + '___'.$resid.'___'. + &Apache::lonnet::declutter($hash{'src_'.$rid}); + $metainfo.= + ''. + '&command=submission">'. + ''. + ''. + ''. + '&command=gradingmenu">'. + ''. + ''. + ''. + '" >'. + ''. + ''; + } + $metainfo.='

'; + unless ($target eq 'tex') { + $r->print(''); + } else { + for (my $incol=1;$incol<=$avespan;$incol++) { + $r->print(' & '); + } + } } - &cell($r,$lastspan,$colcont[$#colcont]); - $r->print(''); + unless ($target eq 'tex') { + $r->print(''); + } else { + $r->print('REMOVETHEHEADOFLONGTABLE\\\\'); + } } } - $r->print("\n
print(' bgcolor="'. + $ssibgcolor{$rid}.'"'); + } + $r->print('>'.$metainfo.'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') { + $r->print(''); + } + if ($env{'course.'. + $env{'request.course.id'}. + '.pageseparators'} eq 'yes') { + unless($target eq 'tex') { + $r->print('
'); + } + } + } elsif ($cellemb{$rid} eq 'img') { + $r->print('>'.$metainfo.''); + } elsif ($cellemb{$rid} eq 'emb') { + $r->print('>'.$metainfo.''); + } elsif (&Apache::lonnet::declutter($hash{'src_'.$rid}) !~/\.(sequence|page)$/) { + $r->print($metainfo.''.$hash{'title_'.$rid}.'
'. + &mt('It is recommended that you use an up-to-date virus scanner before handling this file.').'

'. + &Apache::londocs::entryline(0,&mt("Click to download or use your browser's Save Link function"),'/'.&Apache::lonnet::declutter($hash{'src_'.$rid})).'


'); + } + unless ($target eq 'tex') { + $r->print('
"); - - $r->print(''); + unless ($target eq 'tex') { + $r->print("\n"); + } else { + $r->print('\end{longtable}\strut'); + } +# ---------------------------------------------------------------- Submit, etc. + if ($nforms) { + $r->print( + ''); + } + unless ($target eq 'tex') { + $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 { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; - $r->print('Page undefined.'); + &Apache::lonsequence::viewmap($r,$requrl); } # ------------------------------------------------------------------ Untie hash unless (untie(%hash)) { @@ -209,15 +571,114 @@ sub handler { } } } - $ENV{'user.error.msg'}="$requrl:bre:1:1:Course not initialized"; - return HTTP_NOT_ACCEPTABLE; + &Apache::loncommon::content_type($r,'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: + + + SetHandler perl-script + PerlHandler Apache::lonpage + + +=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