--- rat/lonpage.pm 2000/10/31 19:31:42 1.15 +++ rat/lonpage.pm 2004/12/12 21:06:36 1.65 @@ -1,19 +1,55 @@ # The LearningOnline Network with CAPA # Page Handler # +# $Id: lonpage.pm,v 1.65 2004/12/12 21:06:36 albertel 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 Gerd Kortemeyer +# 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 +# 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 Apache::lonlocal; +use Apache::lonmenu; use HTML::TokeParser; use GDBM_File; +use Apache::lonsequence; # -------------------------------------------------------------- Module Globals my %hash; @@ -37,66 +73,70 @@ sub euclid { 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})) { - my $mincond=1; - my $next=''; - map { - my $thiscond= + $beenhere.=$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; } - } - } split(/\,/,$hash{'to_'.$rid}); - map { - my ($linkid,$condval)=split(/\:/,$_); - if ($condval>=$mincond) { - my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere); - if ($now>$further) { $further=$now; } - } - } split(/\,/,$next); - - } + if ($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 $further; } @@ -110,20 +150,30 @@ sub handler { if ($r->header_only) { if ($ENV{'browser.mathml'}) { - $r->content_type('text/xml'); + &Apache::loncommon::content_type($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'}) { + 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)) { + if (tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER(),0640)) { # ------------------------------------------------------------------- Hash tied my $firstres=$hash{'map_start_'.$requrl}; my $lastres=$hash{'map_finish_'.$requrl}; @@ -132,14 +182,7 @@ sub handler { @rows=(); - &tracetable(0,$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 @@ -148,9 +191,9 @@ sub handler { for ($i=0;$i<=$#rows;$i++) { if ($rows[$i]) { my @colcont=split(/\&/,$rows[$i]); - map { + foreach (@colcont) { $symbhash{$hash{'src_'.$_}}=''; - } @colcont; + } } } &Apache::lonnet::symblist($requrl,%symbhash); @@ -180,8 +223,6 @@ sub handler { my $xmlheader=''; my $xmlbody=''; - my %httpref=(); - # --------------------------------------------- Get SSI output, post parameters for ($i=0;$i<=$#rows;$i++) { @@ -189,33 +230,55 @@ sub handler { $contents++; my @colcont=split(/\&/,$rows[$i]); $lcm*=($#colcont+1)/euclid($lcm,($#colcont+1)); - map { + foreach (@colcont) { my $src=$hash{'src_'.$_}; - $src=~/\.(\w+)$/; + my ($extension)=($src=~/\.(\w+)$/); + if ($hash{'encrypted_'.$_}) { + $src=&Apache::lonenc::encrypted($src); + } $metalink{$_}=$src.'.meta'; - $cellemb{$_}=Apache::lonnet::fileembstyle($1); + $cellemb{$_}= + &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); + my %posthash=('request.prefix' => $prefix, + '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'}; + } if (($ENV{'form.'.$prefix.'submit'}) || ($ENV{'form.all_submit'})) { - map { + foreach (keys %ENV) { if ($_=~/^form.$prefix/) { my $name=$_; $name=~s/^form.$prefix//; $posthash{$name}=$ENV{$_}; } - } keys %ENV; + } } 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 $thisxml=0; my @rlinks=(); - my @alinks=(); if ($output=~/\?xml/) { $isxml=1; $thisxml=1; @@ -233,23 +296,9 @@ sub handler { } elsif ($token->[1] eq 'img') { $rlinks[$#rlinks+1]= $token->[2]->{'src'}; - $alinks[$#alinks+1]= - $token->[2]->{'src'}; } elsif ($token->[1] eq 'embed') { $rlinks[$#rlinks+1]= $token->[2]->{'src'}; - $alinks[$#alinks+1]= - $token->[2]->{'src'}; - } elsif ($token->[1] eq 'applet') { - $alinks[$#alinks+1]= - $token->[2]->{'code'}; - $alinks[$#alinks+1]= - $token->[2]->{'archive'}; - } elsif ($token->[1] eq 'param') { - if ($token->[2]->{'name'} eq 'cabbase') { - $alinks[$#alinks+1]= - $token->[2]->{'value'}; - } } elsif ($token->[1] eq 'base') { $thisdir=$token->[2]->{'href'}; } elsif ($token->[1] eq 'body') { @@ -263,7 +312,11 @@ sub handler { $xmlbody=$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" @@ -279,125 +332,239 @@ sub handler { $nforms++; $output=~s/\]*\>//gsi; $output=~s/\<\/form[^\>]*\>//gsi; + $output=~ + s/\<((?:input|select|button|textarea)[^\>]+)name\s*\=\s*[\'\"]*([\w\.\:]+)[\'\"]*([^\>]*)\>/\<$1 name="$prefix$2" $3\>/gsi; } $thisdir=~s/\/[^\/]*$//; - map { + foreach (@rlinks) { unless (($_=~/^http:\/\//i) || - ($_=~/^\//)) { + ($_=~/^\//) || + ($_=~/^javascript:/i) || + ($_=~/^mailto:/i) || + ($_=~/^\#/)) { my $newlocation= &Apache::lonnet::hreflocation($thisdir,$_); $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/; } - } @rlinks; - map { - $httpref{'httpref.'. - &Apache::lonnet::hreflocation($thisdir,$_)}= - $r->uri; - } @alinks; - $output=~s/\<\s*applet/\]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei; $ssibody{$_}=$output; # ---------------------------------------------------------------- End SSI cell } - } @colcont; + } } } unless ($contents) { - $r->content_type('text/html'); + &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; - $r->print('Empty page.'); + $r->print(''."\n". + ''."\n". + &Apache::lonmenu::registerurl(1,undef)."\n". + ''."\n". + ''. + &Apache::lonmenu::menubuttons(undef,$target,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').'.'); } else { # ------------------------------------------------------------------ Build page -# ------------------------------------------------------------- Mark references - &Apache::lonnet::appenv(%httpref); # ---------------------------------------------------------------- Send headers - if ($isxml) { - $r->content_type('text/xml'); - $r->send_http_header; - $r->print($xmlheader); - } else { - $r->content_type('text/html'); - $r->send_http_header; - $r->print(''); - } + unless ($target eq 'tex') { + if ($isxml) { + &Apache::loncommon::content_type($r,'text/xml'); + $r->send_http_header; + $r->print($xmlheader); + } else { + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + $r->print(''); + } # ------------------------------------------------------------------------ Head - $r->print("\n\n".$allmeta); - if ($allscript) { - $r->print("\n\n"); - } - $r->print("\n\n"); + $r->print("\n\n".$allmeta); + if ($allscript) { + $r->print("\n\n"); + } + $r->print(&Apache::lonmenu::registerurl(1,undef)); + $r->print("\n\n"); # ------------------------------------------------------------------ Start body - if ($isxml) { - $r->print($xmlbody); - } else { - $r->print(''); - } + if ($isxml) { + $r->print($xmlbody); + } else { + $r->print( + ''. + &Apache::lonmenu::menubuttons(undef,$target,1) + ); + } # ------------------------------------------------------------------ Start form - if ($nforms) { - $r->print('
'); - } + if ($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 - $r->print(''); + if ($target eq 'tex') { + $r->print('\begin{longtable}INSERTTHEHEADOFLONGTABLE\endfirsthead\endhead '); + if ($number_of_columns le $lcm) {$number_of_columns=$lcm;}; + } else { + $r->print('
'); + } for ($i=0;$i<=$#rows;$i++) { if ($rows[$i]) { - $r->print("\n"); + unless ($target eq 'tex') { + $r->print("\n"); + } my @colcont=split(/\&/,$rows[$i]); my $avespan=$lcm/($#colcont+1); for ($j=0;$j<=$#colcont;$j++) { my $rid=$colcont[$j]; - my $metainfo=''. - ''. - '

'; - $r->print(''); + unless ($target eq 'tex') { + $r->print(''); + } else { + for (my $incol=1;$incol<=$avespan;$incol++) { + $r->print(' & '); + } + } } - $r->print(''); + unless ($target eq 'tex') { + $r->print(''); + } else { + $r->print('REMOVETHEHEADOFLONGTABLE\\\\'); + } } } - $r->print("\n
'. + ''. + ''. + ''; + } + $metainfo .= ''. + ''. + ''; + if ( + ($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('		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{$rid}.'"'); + unless ($target eq 'tex') { + if ($ssibgcolor{$rid}) { + $r->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(''); } - - $r->print('>'.$ssibody{$rid}.''); - } elsif ($cellemb{$rid} eq 'img') { + if ($ENV{'course.'. + $ENV{'request.course.id'}. + '.pageseparators'} eq 'yes') { + unless($target eq 'tex') { + $r->print('
'); + } else { + $r->print('\hline'); + } + } + } elsif ($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})).'


'); } - $r->print('
"); + unless ($target eq 'tex') { + $r->print("\n"); + } else { + $r->print('\end{longtable}\strut'); + } # ---------------------------------------------------------------- Submit, etc. if ($nforms) { $r->print( '
'); } - $r->print(''); + unless ($target eq 'tex') { + $r->print(''.&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; - $r->print('Page undefined.'); + &Apache::lonsequence::viewmap($r,$requrl); } # ------------------------------------------------------------------ Untie hash unless (untie(%hash)) { @@ -410,15 +577,114 @@ sub handler { } } } - $ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized"; - return HTTP_NOT_ACCEPTABLE; + $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: + + + 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