# The LearningOnline Network with CAPA
# XML Parser Module
#
# $Id: lonxml.pm,v 1.254 2003/05/16 20:51:25 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/
#
# Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
# TtHfunc and TtMfunc (the "Code") may be compiled and linked into
# binary executable programs or libraries distributed by the
# Michigan State University (the "Licensee"), but any binaries so
# distributed are hereby licensed only for use in the context
# of a program or computational system for which the Licensee is the
# primary author or distributor, and which performs substantial
# additional tasks beyond the translation of (La)TeX into HTML.
# The C source of the Code may not be distributed by the Licensee
# to any other parties under any circumstances.
#
# last modified 06/26/00 by Alexander Sakharuk
# 11/6 Gerd Kortemeyer
# 6/1/1 Gerd Kortemeyer
# 2/21,3/13 Guy
# 3/29,5/4 Gerd Kortemeyer
# 5/26 Gerd Kortemeyer
# 5/27 H. K. Ng
# 6/2,6/3,6/8,6/9 Gerd Kortemeyer
# 6/12,6/13 H. K. Ng
# 6/16 Gerd Kortemeyer
# 7/27 H. K. Ng
# 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
# Guy Albertelli
# 9/26 Gerd Kortemeyer
# Dec Guy Albertelli
# YEAR=2002
# 1/1 Gerd Kortemeyer
# 1/2 Matthew Hall
# 1/3 Gerd Kortemeyer
#
package Apache::lonxml;
use vars
qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
use strict;
use HTML::LCParser();
use HTML::TreeBuilder();
use HTML::Entities();
use Safe();
use Safe::Hole();
use Math::Cephes();
use Math::Random();
use Opcode();
sub register {
my ($space,@taglist) = @_;
foreach my $temptag (@taglist) {
push(@{ $Apache::lonxml::alltags{$temptag} },$space);
}
}
sub deregister {
my ($space,@taglist) = @_;
foreach my $temptag (@taglist) {
my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
if ($tempspace eq $space) {
pop(@{ $Apache::lonxml::alltags{$temptag} });
}
}
#&printalltags();
}
use Apache::Constants qw(:common);
use Apache::lontexconvert();
use Apache::style();
use Apache::run();
use Apache::londefdef();
use Apache::scripttag();
use Apache::edit();
use Apache::lonnet();
use Apache::File();
use Apache::loncommon();
use Apache::lonfeedback();
use Apache::lonmsg();
use Apache::loncacc();
#================================================== Main subroutine: xmlparse
#debugging control, to turn on debugging modify the correct handler
$Apache::lonxml::debug=0;
# keeps count of the number of warnings and errors generated in a parse
$warningcount=0;
$errorcount=0;
#path to the directory containing the file currently being processed
@pwd=();
#these two are used for capturing a subset of the output for later processing,
#don't touch them directly use &startredirection and &endredirection
@outputstack = ();
$redirection = 0;
#controls wheter the tag actually does
$import = 1;
@extlinks=();
# meta mode is a bit weird only some output is to be turned off
#
';
}
}
}
unless ($discussiononly) {
$discussion.='';
}
}
if ($discussiononly) {
$discussion.=(<
Note: in anonymous discussion, your name is visible only to
course faculty
Attachment (128 KB max size):
ENDDISCUSS
$discussion.=&Apache::lonfeedback::generate_preview_button();
}
}
}
return $discussion.($discussiononly?'':'');
}
sub tokeninputfield {
my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
$defhost=~tr/a-z/A-Z/;
return (<
function updatetoken() {
var comp=new Array;
var barcode=unescape(document.tokeninput.barcode.value);
comp=barcode.split('*');
if (typeof(comp[0])!="undefined") {
document.tokeninput.codeone.value=comp[0];
}
if (typeof(comp[1])!="undefined") {
document.tokeninput.codetwo.value=comp[1];
}
if (typeof(comp[2])!="undefined") {
comp[2]=comp[2].toUpperCase();
document.tokeninput.codethree.value=comp[2];
}
document.tokeninput.barcode.value='';
}
ENDINPUTFIELD
}
sub maketoken {
my ($symb,$tuname,$tudom,$tcrsid)=@_;
unless ($symb) {
$symb=&Apache::lonnet::symbread();
}
unless ($tuname) {
$tuname=$ENV{'user.name'};
$tudom=$ENV{'user.domain'};
$tcrsid=$ENV{'request.course.id'};
}
return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
}
sub printtokenheader {
my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
unless ($token) { return ''; }
my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
unless ($tsymb) {
$tsymb=$symb;
}
unless ($tuname) {
$tuname=$name;
$tudom=$domain;
$tcrsid=$courseid;
}
my %reply=&Apache::lonnet::get('environment',
['firstname','middlename','lastname','generation'],
$tudom,$tuname);
my $plainname=$reply{'firstname'}.' '.
$reply{'middlename'}.' '.
$reply{'lastname'}.' '.
$reply{'generation'};
if ($target eq 'web') {
my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
return
''.
'Checked out for '.$plainname.
' User: '.$tuname.' at '.$tudom.
' ID: '.$idhash{$tuname}.
' CourseID: '.$tcrsid.
' Course: '.$ENV{'course.'.$tcrsid.'.description'}.
' DocID: '.$token.
' Time: '.localtime().'';
} else {
return $token;
}
}
sub fontsettings() {
my $headerstring='';
if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) {
$headerstring.=
'';
} elsif (!$ENV{'browser.mathml'}) {
$headerstring.=
'';
}
return $headerstring;
}
sub printalltags {
my $temp;
foreach $temp (sort keys %Apache::lonxml::alltags) {
&Apache::lonxml::debug("$temp -- ".
join(',',@{ $Apache::lonxml::alltags{$temp} }));
}
}
sub xmlparse {
my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
&setup_globals($request,$target);
&Apache::inputtags::initialize_inputtags();
&Apache::outputtags::initialize_outputtags();
&Apache::edit::initialize_edit();
#
# do we have a course style file?
#
if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
my $bodytext=
$ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
if ($bodytext) {
my $location=&Apache::lonnet::filelocation('',$bodytext);
my $styletext=&Apache::lonnet::getfile($location);
if ($styletext ne '-1') {
%style_for_target = (%style_for_target,
&Apache::style::styleparser($target,$styletext));
}
}
}
#&printalltags();
my @pars = ();
my $pwd=$ENV{'request.filename'};
$pwd =~ s:/[^/]*$::;
&newparser(\@pars,\$content_file_string,$pwd);
my $safeeval = new Safe;
my $safehole = new Safe::Hole;
&init_safespace($target,$safeeval,$safehole,$safeinit);
#-------------------- Redefinition of the target in the case of compound target
($target, my @tenta) = split('&&',$target);
my @stack = ();
my @parstack = ();
&initdepth;
my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
$safeeval,\%style_for_target);
if ($ENV{'request.uri'}) {
&writeallows($ENV{'request.uri'});
}
if ($Apache::lonxml::counter_changed) { &store_counter() }
return $finaloutput;
}
sub htmlclean {
my ($raw,$full)=@_;
my $tree = HTML::TreeBuilder->new;
$tree->ignore_unknown(0);
$tree->parse($raw);
my $output= $tree->as_HTML(undef,' ');
$output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
$output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
unless ($full) {
$output=~s/\<[\/]*(body|head|html)\>//gis;
}
$tree = $tree->delete;
return $output;
}
sub latex_special_symbols {
my ($current_token,$stack,$parstack,$where)=@_;
if ($where eq 'header') {
$current_token =~ s/(\\|_|\^)/ /g;
$current_token =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
} else {
$current_token=~s/\\ /\\char92 /g;
$current_token=~s/\^/\\char94 /g;
$current_token=~s/\~/\\char126 /g;
$current_token=~s/(&[^A-Za-z\#])/\\$1/g;
$current_token=~s/([^&])\#/$1\\#/g;
$current_token=~s/(\$|_|{|})/\\$1/g;
$current_token=~s/\\char92 /\\texttt{\\char92}/g;
$current_token=~s/(>|<)/\$$1\$/g; #more or less
if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
}
return $current_token;
}
sub inner_xmlparse {
my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
my $finaloutput = '';
my $result;
my $token;
while ( $#$pars > -1 ) {
while ($token = $$pars['-1']->get_token) {
if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
if ($metamode<1) {
my $text=$token->[1];
if ($token->[0] eq 'C' && $target eq 'tex') {
$text = '';
# $text = '%'.$text."\n";
}
$result.=$text;
}
} elsif ($token->[0] eq 'PI') {
if ($metamode<1) {
$result=$token->[2];
}
} elsif ($token->[0] eq 'S') {
# add tag to stack
push (@$stack,$token->[1]);
# add parameters list to another stack
push (@$parstack,&parstring($token));
&increasedepth($token);
if ($Apache::lonxml::usestyle &&
exists($$style_for_target{$token->[1]})) {
$Apache::lonxml::usestyle=0;
my $string=$$style_for_target{$token->[1]}.
'';
&Apache::lonxml::newparser($pars,\$string);
} else {
$result = &callsub("start_$token->[1]", $target, $token, $stack,
$parstack, $pars, $safeeval, $style_for_target);
}
} elsif ($token->[0] eq 'E') {
#clear out any tags that didn't end
while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
my $lasttag=$$stack[-1];
if ($token->[1] =~ /^$lasttag$/i) {
&Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
last;
} else {
&Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
&end_tag($stack,$parstack,$token);
}
}
if ($Apache::lonxml::usestyle &&
exists($$style_for_target{'/'."$token->[1]"})) {
$Apache::lonxml::usestyle=0;
my $string=$$style_for_target{'/'.$token->[1]}.
'';
&Apache::lonxml::newparser($pars,\$string);
} else {
$result = &callsub("end_$token->[1]", $target, $token, $stack,
$parstack, $pars,$safeeval, $style_for_target);
}
} else {
&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
}
#evaluate variable refs in result
if ($result ne "") {
if ( $#$parstack > -1 ) {
$result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
} else {
$result= &Apache::run::evaluate($result,$safeeval,'');
}
}
if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
#Style file definitions should be correct
if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
$result=&latex_special_symbols($result,$stack,$parstack);
}
}
# Encode any high ASCII characters
if (!$Apache::lonxml::prevent_entity_encode) {
$result=&HTML::Entities::encode($result,"\200-\377");
}
if ($Apache::lonxml::redirection) {
$Apache::lonxml::outputstack['-1'] .= $result;
} else {
$finaloutput.=$result;
}
$result = '';
if ($token->[0] eq 'E') {
&end_tag($stack,$parstack,$token);
}
}
if ($#$pars > -1) {
pop @$pars;
pop @Apache::lonxml::pwd;
}
}
# if ($target eq 'meta') {
# $finaloutput.=&endredirection;
# }
if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
$finaloutput=&afterburn($finaloutput);
}
return $finaloutput;
}
sub callsub {
my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $currentstring='';
my $nodefault;
{
my $sub1;
no strict 'refs';
my $tag=$token->[1];
# get utterly rid of extended html tags
if ($tag=~/^x\-/i) { return ''; }
my $space=$Apache::lonxml::alltags{$tag}[-1];
if (!$space) {
$tag=~tr/A-Z/a-z/;
$sub=~tr/A-Z/a-z/;
$space=$Apache::lonxml::alltags{$tag}[-1]
}
my $deleted=0;
$Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
if (($token->[0] eq 'S') && ($target eq 'modified')) {
$deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
$parstack,$parser,$safeeval,
$style);
}
if (!$deleted) {
if ($space) {
#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
$sub1="$space\:\:$sub";
($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
$parstack,$parser,$safeeval,
$style);
} else {
#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
if ($metamode <1) {
if (defined($token->[4]) && ($metamode < 1)) {
$currentstring = $token->[4];
} else {
$currentstring = $token->[2];
}
}
}
# &Apache::lonxml::debug("nodefalt:$nodefault:");
if ($currentstring eq '' && $nodefault eq '') {
if ($target eq 'edit') {
#&Apache::lonxml::debug("doing default edit for $token->[1]");
if ($token->[0] eq 'S') {
$currentstring = &Apache::edit::tag_start($target,$token);
} elsif ($token->[0] eq 'E') {
$currentstring = &Apache::edit::tag_end($target,$token);
}
} elsif ($target eq 'modified') {
if ($token->[0] eq 'S') {
$currentstring = $token->[4];
$currentstring.=&Apache::edit::handle_insert();
} elsif ($token->[0] eq 'E') {
$currentstring = $token->[2];
$currentstring.=&Apache::edit::handle_insertafter($token->[1]);
} else {
$currentstring = $token->[2];
}
}
}
}
use strict 'refs';
}
return $currentstring;
}
sub setup_globals {
my ($request,$target)=@_;
$Apache::lonxml::request=$request;
$Apache::lonxml::registered = 0;
$errorcount=0;
$warningcount=0;
$Apache::lonxml::default_homework_loaded=0;
$Apache::lonxml::usestyle=1;
&init_counter();
@Apache::lonxml::pwd=();
@Apache::lonxml::extlinks=();
if ($target eq 'meta') {
$Apache::lonxml::redirection = 0;
$Apache::lonxml::metamode = 1;
$Apache::lonxml::evaluate = 1;
$Apache::lonxml::import = 0;
} elsif ($target eq 'answer') {
$Apache::lonxml::redirection = 0;
$Apache::lonxml::metamode = 1;
$Apache::lonxml::evaluate = 1;
$Apache::lonxml::import = 1;
} elsif ($target eq 'grade') {
&startredirection;
$Apache::lonxml::metamode = 0;
$Apache::lonxml::evaluate = 1;
$Apache::lonxml::import = 1;
} elsif ($target eq 'modified') {
$Apache::lonxml::redirection = 0;
$Apache::lonxml::metamode = 0;
$Apache::lonxml::evaluate = 0;
$Apache::lonxml::import = 0;
} elsif ($target eq 'edit') {
$Apache::lonxml::redirection = 0;
$Apache::lonxml::metamode = 0;
$Apache::lonxml::evaluate = 0;
$Apache::lonxml::import = 0;
} elsif ($target eq 'analyze') {
$Apache::lonxml::redirection = 0;
$Apache::lonxml::metamode = 0;
$Apache::lonxml::evaluate = 1;
$Apache::lonxml::import = 1;
} else {
$Apache::lonxml::redirection = 0;
$Apache::lonxml::metamode = 0;
$Apache::lonxml::evaluate = 1;
$Apache::lonxml::import = 1;
}
}
sub init_safespace {
my ($target,$safeeval,$safehole,$safeinit) = @_;
$safeeval->permit("entereval");
$safeeval->permit(":base_math");
$safeeval->permit("sort");
$safeeval->deny(":base_io");
$safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
$safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
$safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
$safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
$safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
$safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
$safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
$safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
$safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
$safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
$safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
$safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
$safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
$safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
$safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
$safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
$safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
$safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
$safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
$safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
$safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
$safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
$safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' );
$safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
$safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
$safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
$safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
$safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
$safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
$safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' );
$safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
$safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
$safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' );
$safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
$safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
$safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
$safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
$safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' );
$safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
$safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' );
$safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
$safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
$safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
$safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
# $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
# $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
# $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
# $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
# $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
# $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
$safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
$safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
$safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
$safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
$safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
$safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
$safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
$safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
$safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
$safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
$safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
$safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
$safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
$safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
$safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
$safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
$safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
$safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
$safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
$safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
$safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
#need to inspect this class of ops
# $safeeval->deny(":base_orig");
$safeinit .= ';$external::target="'.$target.'";';
my $rndseed;
my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
$rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
$safeinit .= ';$external::randomseed='.$rndseed.';';
&Apache::lonxml::debug("Setting rndseed to $rndseed");
&Apache::run::run($safeinit,$safeeval);
}
sub default_homework_load {
my ($safeeval)=@_;
&Apache::lonxml::debug('Loading default_homework');
my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
if ($default eq -1) {
&Apache::lonxml::error("Unable to find default_homework.lcpm");
} else {
&Apache::run::run($default,$safeeval);
$Apache::lonxml::default_homework_loaded=1;
}
}
sub startredirection {
$Apache::lonxml::redirection++;
push (@Apache::lonxml::outputstack, '');
}
sub endredirection {
if (!$Apache::lonxml::redirection) {
&Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
return '';
}
$Apache::lonxml::redirection--;
pop @Apache::lonxml::outputstack;
}
sub end_tag {
my ($tagstack,$parstack,$token)=@_;
pop(@$tagstack);
pop(@$parstack);
&decreasedepth($token);
}
sub initdepth {
@Apache::lonxml::depthcounter=();
$Apache::lonxml::depth=-1;
$Apache::lonxml::olddepth=-1;
}
sub increasedepth {
my ($token) = @_;
$Apache::lonxml::depth++;
$Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
$Apache::lonxml::olddepth=$Apache::lonxml::depth;
}
my $curdepth=join('_',@Apache::lonxml::depthcounter);
&Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
#print " s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
}
sub decreasedepth {
my ($token) = @_;
$Apache::lonxml::depth--;
if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
$#Apache::lonxml::depthcounter--;
$Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
}
if ( $Apache::lonxml::depth < -1) {
&Apache::lonxml::warning("Missing tags, unable to properly run file.");
$Apache::lonxml::depth='-1';
}
my $curdepth=join('_',@Apache::lonxml::depthcounter);
&Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
#print " e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
}
sub get_all_text_unbalanced {
#there is a copy of this in lonpublisher.pm
my($tag,$pars)= @_;
my $token;
my $result='';
$tag='<'.$tag.'>';
while ($token = $$pars[-1]->get_token) {
if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
$result.=$token->[1];
} elsif ($token->[0] eq 'PI') {
$result.=$token->[2];
} elsif ($token->[0] eq 'S') {
$result.=$token->[4];
} elsif ($token->[0] eq 'E') {
$result.=$token->[2];
}
if ($result =~ /(.*)\Q$tag\E(.*)/s) {
&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
&Apache::lonxml::debug('Result is :'.$1);
$result=$1;
my $redo=$tag.$2;
&Apache::lonxml::newparser($pars,\$redo);
last;
}
}
return $result
}
sub increment_counter {
my ($increment) = @_;
if (defined($increment) && $increment gt 0) {
$Apache::lonxml::counter+=$increment;
} else {
$Apache::lonxml::counter++;
}
$Apache::lonxml::counter_changed=1;
}
sub init_counter {
if (defined($ENV{'form.counter'})) {
$Apache::lonxml::counter=$ENV{'form.counter'};
$Apache::lonxml::counter_changed=0;
} else {
$Apache::lonxml::counter=1;
$Apache::lonxml::counter_changed=1;
}
}
sub store_counter {
&Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
return '';
}
sub get_all_text {
my($tag,$pars)= @_;
&Apache::lonxml::debug("Got a ".ref($pars));
my $gotfullstack=1;
if (ref($pars) ne 'ARRAY') {
$gotfullstack=0;
$pars=[$pars];
}
my $depth=0;
my $token;
my $result='';
if ( $tag =~ m:^/: ) {
my $tag=substr($tag,1);
#&Apache::lonxml::debug("have:$tag:");
my $top_empty=0;
while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
$result.=$token->[1];
} elsif ($token->[0] eq 'PI') {
$result.=$token->[2];
} elsif ($token->[0] eq 'S') {
if ($token->[1] =~ /^$tag$/i) { $depth++; }
$result.=$token->[4];
} elsif ($token->[0] eq 'E') {
if ( $token->[1] =~ /^$tag$/i) { $depth--; }
#skip sending back the last end tag
if ($depth > -1) { $result.=$token->[2]; } else {
$$pars[-1]->unget_token($token);
}
}
}
if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
if (($depth >=0) && ($#$pars > 0) ) {
pop(@$pars);
pop(@Apache::lonxml::pwd);
}
}
if ($top_empty && $depth >= 0) {
#never found the end tag ran out of text, throw error send back blank
&error('Never found end tag for <'.$tag.'>');
if ($gotfullstack) {
my $newstring=''.$tag.'>'.$result;
&Apache::lonxml::newparser($pars,\$newstring);
}
$result='';
}
} else {
while ($#$pars > -1) {
while ($token = $$pars[-1]->get_token) {
#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
if (($token->[0] eq 'T')||($token->[0] eq 'C')||
($token->[0] eq 'D')) {
$result.=$token->[1];
} elsif ($token->[0] eq 'PI') {
$result.=$token->[2];
} elsif ($token->[0] eq 'S') {
if ( $token->[1] =~ /^$tag$/i) {
$$pars[-1]->unget_token($token); last;
} else {
$result.=$token->[4];
}
} elsif ($token->[0] eq 'E') {
$result.=$token->[2];
}
}
if (($#$pars > 0) ) {
pop(@$pars);
pop(@Apache::lonxml::pwd);
} else { last; }
}
}
if ($result =~ m||) {
$Apache::lonxml::usestyle=1;
}
#&Apache::lonxml::debug("Exit:$result:");
return $result
}
sub newparser {
my ($parser,$contentref,$dir) = @_;
push (@$parser,HTML::LCParser->new($contentref));
$$parser['-1']->xml_mode('1');
if ( $dir eq '' ) {
push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
} else {
push (@Apache::lonxml::pwd, $dir);
}
# &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
# &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
}
sub parstring {
my ($token) = @_;
my $temp='';
foreach (@{$token->[3]}) {
unless ($_=~/\W/) {
my $val=$token->[2]->{$_};
$val =~ s/([\%\@\\\"\'])/\\$1/g;
#if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
$temp .= "my \$$_=\"$val\";"
}
}
return $temp;
}
sub writeallows {
unless ($#extlinks>=0) { return; }
my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
if ($ENV{'httpref.'.$thisurl}) {
$thisurl=$ENV{'httpref.'.$thisurl};
}
my $thisdir=$thisurl;
$thisdir=~s/\/[^\/]+$//;
my %httpref=();
foreach (@extlinks) {
$httpref{'httpref.'.
&Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
}
@extlinks=();
&Apache::lonnet::appenv(%httpref);
}
#
# Afterburner handles anchors, highlights and links
#
sub afterburn {
my $result=shift;
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['highlight','anchor','link']);
if ($ENV{'form.highlight'}) {
foreach (split(/\,/,$ENV{'form.highlight'})) {
my $anchorname=$_;
my $matchthis=$anchorname;
$matchthis=~s/\_+/\\s\+/g;
$result=~s/($matchthis)/\$1\<\/font\>/gs;
}
}
if ($ENV{'form.link'}) {
foreach (split(/\,/,$ENV{'form.link'})) {
my ($anchorname,$linkurl)=split(/\>/,$_);
my $matchthis=$anchorname;
$matchthis=~s/\_+/\\s\+/g;
$result=~s/($matchthis)/\$1\<\/a\>/gs;
}
}
if ($ENV{'form.anchor'}) {
my $anchorname=$ENV{'form.anchor'};
my $matchthis=$anchorname;
$matchthis=~s/\_+/\\s\+/g;
$result=~s/($matchthis)/\$1\<\/a\>/s;
$result.=(<<"ENDSCRIPT");
ENDSCRIPT
}
return $result;
}
sub storefile {
my ($file,$contents)=@_;
if (my $fh=Apache::File->new('>'.$file)) {
print $fh $contents;
$fh->close();
} else {
&warning("Unable to save file $file");
}
}
sub createnewhtml {
my $filecontents=(<
Title of Document Goes Here
Body of Document Goes Here
SIMPLECONTENT
return $filecontents;
}
sub inserteditinfo {
my ($result,$filecontents)=@_;
$filecontents = &HTML::Entities::encode($filecontents);
# my $editheader='Edit below';
my $xml_help = '