# The LearningOnline Network with CAPA
# XML Parser Module
#
# $Id: lonxml.pm,v 1.460 2007/09/12 10:58:18 foxr 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.
#
package Apache::lonxml;
use vars
qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
use strict;
use LONCAPA;
use HTML::LCParser();
use HTML::TreeBuilder();
use HTML::Entities();
use Safe();
use Safe::Hole();
use Math::Cephes();
use Math::Random();
use Opcode();
use POSIX qw(strftime);
use Time::HiRes qw( gettimeofday tv_interval );
use Symbol();
sub register {
my ($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::languagetags();
use Apache::edit();
use Apache::inputtags();
use Apache::outputtags();
use Apache::lonnet;
use Apache::File();
use Apache::loncommon();
use Apache::lonfeedback();
use Apache::lonmsg();
use Apache::loncacc();
use Apache::lonmaxima();
use Apache::lonlocal;
#================================================== 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 <import> tag actually does
$import = 1;
@extlinks=();
# meta mode is a bit weird only some output is to be turned off
#<output> tag turns metamode off (defined in londefdef.pm)
$metamode = 0;
# turns on and of run::evaluate actually derefencing var refs
$evaluate = 1;
# data structure for eidt mode, determines what tags can go into what other tags
%insertlist=();
# stores the list of active tag namespaces
@namespace=();
# stores all Scrit Vars displays for later showing
my @script_var_displays=();
# a pointer the the Apache request object
$Apache::lonxml::request='';
# a problem number counter, and check on ether it is used
$Apache::lonxml::counter=1;
$Apache::lonxml::counter_changed=0;
# A count of bubble lines needed for a set.. and a check on
# whether or not it is ever used too:
$Apache::lonxml::bubble_line_counter = 1;
$Apache::lonxml::bubble_line_counter_changed = 0;
#internal check on whether to look at style defs
$Apache::lonxml::usestyle=1;
#locations used to store the parameter string for style substitutions
$Apache::lonxml::style_values='';
$Apache::lonxml::style_end_values='';
#array of ssi calls that need to occur after we are done parsing
@Apache::lonxml::ssi_info=();
#should we do the postag variable interpolation
$Apache::lonxml::post_evaluate=1;
#a header message to emit in the case of any generated warning or errors
$Apache::lonxml::warnings_error_header='';
# Control whether or not LaTeX symbols should be substituted for their
# \ style equivalents...this may be turned off e.g. in an verbatim
# environment.
$Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
sub enable_LaTeX_substitutions {
$Apache::lonxml::substitute_LaTeX_symbols = 1;
}
sub disable_LaTeX_substitutions {
$Apache::lonxml::substitute_LaTeX_symbols = 0;
}
sub xmlend {
my ($target,$parser)=@_;
my $mode='xml';
my $status='OPEN';
if ($Apache::lonhomework::parsing_a_problem ||
$Apache::lonhomework::parsing_a_task ) {
$mode='problem';
$status=$Apache::inputtags::status[-1];
}
my $discussion;
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['LONCAPA_INTERNAL_no_discussion']);
if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
$env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
$discussion=&Apache::lonfeedback::list_discussion($mode,$status);
}
if ($target eq 'tex') {
$discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
&Apache::lonxml::newparser($parser,\$discussion,'');
return '';
}
return $discussion;
}
sub tokeninputfield {
my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
$defhost=~tr/a-z/A-Z/;
return (<<ENDINPUTFIELD)
<script type="text/javascript">
function updatetoken() {
var comp=new Array;
var barcode=unescape(document.tokeninput.barcode.value);
comp=barcode.split('*');
if (typeof(comp[0])!="undefined") {
document.tokeninput.codeone.value=comp[0];
}
if (typeof(comp[1])!="undefined") {
document.tokeninput.codetwo.value=comp[1];
}
if (typeof(comp[2])!="undefined") {
comp[2]=comp[2].toUpperCase();
document.tokeninput.codethree.value=comp[2];
}
document.tokeninput.barcode.value='';
}
</script>
<form method="post" name="tokeninput">
<table border="2" bgcolor="#FFFFBB">
<tr><th>DocID Checkin</th></tr>
<tr><td>
<table>
<tr>
<td>Scan in Barcode</td>
<td><input type="text" size="22" name="barcode"
onChange="updatetoken()"/></td>
</tr>
<tr><td><i>or</i> Type in DocID</td>
<td>
<input type="text" size="5" name="codeone" />
<b><font size="+2">*</font></b>
<input type="text" size="5" name="codetwo" />
<b><font size="+2">*</font></b>
<input type="text" size="10" name="codethree" value="$defhost"
onChange="this.value=this.value.toUpperCase()" />
</td></tr>
</table>
</td></tr>
<tr><td><input type="submit" value="Check in DocID" /></td></tr>
</table>
</form>
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,$name) = &Apache::lonnet::whichuser();
unless ($tsymb) {
$tsymb=$symb;
}
unless ($tuname) {
$tuname=$name;
$tudom=$domain;
$tcrsid=$courseid;
}
my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
if ($target eq 'web') {
my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
return
'<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
&mt('Checked out for').' '.$plainname.
'<br />'.&mt('User').': '.$tuname.' at '.$tudom.
'<br />'.&mt('ID').': '.$idhash{$tuname}.
'<br />'.&mt('CourseID').': '.$tcrsid.
'<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
'<br />'.&mt('DocID').': '.$token.
'<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
} else {
return $token;
}
}
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::bridgetask::initialize_bridgetask();
&Apache::outputtags::initialize_outputtags();
&Apache::edit::initialize_edit();
&Apache::londefdef::initialize_londefdef();
#
# 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) {
foreach my $file (split(',',$bodytext)) {
my $location=&Apache::lonnet::filelocation('',$file);
my $styletext=&Apache::lonnet::getfile($location);
if ($styletext ne '-1') {
%style_for_target = (%style_for_target,
&Apache::style::styleparser($target,$styletext));
}
}
}
} elsif ($env{'construct.style'}
&& ($env{'request.state'} eq 'construct')) {
my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
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();
&init_alarm();
my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
$safeeval,\%style_for_target,1);
if (@stack) {
&warning("At end of file some tags were still left unclosed, ".
'<tt><'.join('></tt>, <tt><',reverse(@stack)).
'></tt>');
}
if ($env{'request.uri'}) {
&writeallows($env{'request.uri'});
}
&do_registered_ssi();
if ($Apache::lonxml::counter_changed) { &store_counter() }
if ($Apache::lonxml::bubble_line_counter_changed) {
&store_bubble_counter();
}
&clean_safespace($safeeval);
if (@script_var_displays) {
$finaloutput .= join('',@script_var_displays);
undef(@script_var_displays);
}
if ($env{'form.return_only_error_and_warning_counts'}) {
return "$errorcount:$warningcount";
}
return $finaloutput;
}
sub latex_special_symbols {
my ($string,$where)=@_;
#
# If e.g. in verbatim mode, then don't substitute.
# but return original string.
#
if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
return $string;
}
if ($where eq 'header') {
$string =~ s/\\/\$\\backslash\$/g; # \ -> $\backslash$ per LaTex line by line pg 10.
$string =~ s/(\$|%|\{|\})/\\$1/g;
$string=&Apache::lonprintout::character_chart($string);
# any & or # leftover should be safe to just escape
$string=~s/([^\\])\&/$1\\\&/g;
$string=~s/([^\\])\#/$1\\\#/g;
$string =~ s/_/\\_/g; # _ -> \_
$string =~ s/\^/\\\^{}/g; # ^ -> \^{}
} else {
$string=~s/\\/\\ensuremath{\\backslash}/g;
$string=~s/\\\%|\%/\\\%/g;
$string=~s/\\{|{/\\{/g;
$string=~s/\\}|}/\\}/g;
$string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
$string=~s/\\\$|\$/\\\$/g;
$string=~s/\\\_|\_/\\\_/g;
$string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
$string=&Apache::lonprintout::character_chart($string);
# any & or # leftover should be safe to just escape
$string=~s/\\\&|\&/\\\&/g;
$string=~s/\\\#|\#/\\\#/g;
$string=~s/\|/\$\\mid\$/g;
#single { or } How to escape?
}
return $string;
}
sub inner_xmlparse {
my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
my $finaloutput = '';
my $result;
my $token;
my $dontpop=0;
my $startredirection = $Apache::lonxml::redirection;
while ( $#$pars > -1 ) {
while ($token = $$pars['-1']->get_token) {
if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
if ($metamode<1) {
my $text=$token->[1];
if ($token->[0] eq 'C' && $target eq 'tex') {
$text = '';
# $text = '%'.$text."\n";
}
$result.=$text;
}
} elsif (($token->[0] eq 'D')) {
if ($metamode<1 && $target eq 'web') {
my $text=$token->[1];
$result.=$text;
}
} elsif ($token->[0] eq 'PI') {
if ($metamode<1 && $target eq 'web') {
$result=$token->[2];
}
} elsif ($token->[0] eq 'S') {
# add tag to stack
push (@$stack,$token->[1]);
# add parameters list to another stack
push (@$parstack,&parstring($token));
&increasedepth($token);
if ($Apache::lonxml::usestyle &&
exists($$style_for_target{$token->[1]})) {
$Apache::lonxml::usestyle=0;
my $string=$$style_for_target{$token->[1]}.
'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
&Apache::lonxml::newparser($pars,\$string);
$Apache::lonxml::style_values=$$parstack[-1];
$Apache::lonxml::style_end_values=$$parstack[-1];
} else {
$result = &callsub("start_$token->[1]", $target, $token, $stack,
$parstack, $pars, $safeeval, $style_for_target);
}
} elsif ($token->[0] eq 'E') {
if ($Apache::lonxml::usestyle &&
exists($$style_for_target{'/'."$token->[1]"})) {
$Apache::lonxml::usestyle=0;
my $string=$$style_for_target{'/'.$token->[1]}.
'<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
&Apache::lonxml::newparser($pars,\$string);
$Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
$Apache::lonxml::style_end_values='';
$dontpop=1;
} else {
#clear out any tags that didn't end
while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
my $lasttag=$$stack[-1];
if ($token->[1] =~ /^\Q$lasttag\E$/i) {
&Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>');
last;
} else {
&Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file');
&end_tag($stack,$parstack,$token);
}
}
$result = &callsub("end_$token->[1]", $target, $token, $stack,
$parstack, $pars,$safeeval, $style_for_target);
}
} else {
&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
}
#evaluate variable refs in result
if ($Apache::lonxml::post_evaluate &&$result ne "") {
my $extras;
if (!$Apache::lonxml::usestyle) {
$extras=$Apache::lonxml::style_values;
}
if ( $#$parstack > -1 ) {
$result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
} else {
$result= &Apache::run::evaluate($result,$safeeval,$extras);
}
}
$Apache::lonxml::post_evaluate=1;
if (($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);
}
}
if ($Apache::lonxml::redirection) {
$Apache::lonxml::outputstack['-1'] .= $result;
} else {
$finaloutput.=$result;
}
$result = '';
if ($token->[0] eq 'E' && !$dontpop) {
&end_tag($stack,$parstack,$token);
}
$dontpop=0;
}
if ($#$pars > -1) {
pop @$pars;
pop @Apache::lonxml::pwd;
}
}
# if ($target eq 'meta') {
# $finaloutput.=&endredirection;
# }
if ( $start && $target eq 'grade') { &endredirection(); }
if ( $Apache::lonxml::redirection > $startredirection) {
while ($Apache::lonxml::redirection > $startredirection) {
$finaloutput .= &endredirection();
}
}
if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
$finaloutput=&afterburn($finaloutput);
}
return $finaloutput;
}
##
## Looks to see if there is a subroutine defined for this tag. If so, call it,
## otherwise do not call it as we do not know what it is.
##
sub callsub {
my ($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 $deleted=0;
if (($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,
$style);
} else {
if ($target eq 'tex') {
# throw away tag name
return '';
}
#&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,$token);
}
}
}
if ($target eq 'modified' && $nodefault eq '') {
if ($currentstring eq '') {
if ($token->[0] eq 'S') {
$currentstring = $token->[4];
} elsif ($token->[0] eq 'E') {
$currentstring = $token->[2];
} else {
$currentstring = $token->[2];
}
}
if ($token->[0] eq 'S') {
$currentstring.=&Apache::edit::handle_insert();
} elsif ($token->[0] eq 'E') {
$currentstring.=&Apache::edit::handle_insertafter($token->[1]);
}
}
}
use strict 'refs';
}
return $currentstring;
}
sub setup_globals {
my ($request,$target)=@_;
$Apache::lonxml::request=$request;
$errorcount=0;
$warningcount=0;
$Apache::lonxml::default_homework_loaded=0;
$Apache::lonxml::usestyle=1;
&init_counter();
&init_bubble_counter();
@Apache::lonxml::pwd=();
@Apache::lonxml::extlinks=();
@script_var_displays=();
@Apache::lonxml::ssi_info=();
$Apache::lonxml::post_evaluate=1;
$Apache::lonxml::warnings_error_header='';
$Apache::lonxml::substitute_LaTeX_symbols = 1;
if ($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(); #ended in inner_xmlparse on exit
$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->deny_only(':dangerous');
$safeeval->reval('use Math::Complex;');
$safeeval->permit_only(":default");
$safeeval->permit("entereval");
$safeeval->permit(":base_math");
$safeeval->permit("sort");
$safeeval->permit("time");
$safeeval->deny("rand");
$safeeval->deny("srand");
$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');
$safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
'&chem_standard_order');
$safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
$safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
$safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
$safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
'&maxima_cas_formula_fix');
$safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
'&capa_formula_fix');
$safehole->wrap(\&Math::Cephes::asin,$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');
$safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
$safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
'&Math::Cephes::Matrix::new');
$safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
'&Math::Cephes::Matrix::coef');
$safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
'&Math::Cephes::Matrix::clr');
$safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
'&Math::Cephes::Matrix::add');
$safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
'&Math::Cephes::Matrix::sub');
$safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
'&Math::Cephes::Matrix::mul');
$safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
'&Math::Cephes::Matrix::div');
$safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
'&Math::Cephes::Matrix::inv');
$safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
'&Math::Cephes::Matrix::transp');
$safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
'&Math::Cephes::Matrix::simq');
$safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
'&Math::Cephes::Matrix::mat_to_vec');
$safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
'&Math::Cephes::Matrix::vec_to_mat');
$safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
'&Math::Cephes::Matrix::check');
$safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
'&Math::Cephes::Matrix::check');
# $safehole->wrap(\&Math::Cephes::new_fract,$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');
$safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
$safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
$safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
$safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
$safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
$safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
# use Data::Dumper;
# $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
#need to inspect this class of ops
# $safeeval->deny(":base_orig");
$safeeval->permit("require");
$safeinit .= ';$external::target="'.$target.'";';
&Apache::run::run($safeinit,$safeeval);
&initialize_rndseed($safeeval);
}
sub clean_safespace {
my ($safeeval) = @_;
delete_package_recurse($safeeval->{Root});
}
sub delete_package_recurse {
my ($package) = @_;
my @subp;
{
no strict 'refs';
while (my ($key,$val) = each(%{*{"$package\::"}})) {
if (!defined($val)) { next; }
local (*ENTRY) = $val;
if (defined *ENTRY{HASH} && $key =~ /::$/ &&
$key ne "main::" && $key ne "<none>::")
{
my ($p) = $package ne "main" ? "$package\::" : "";
($p .= $key) =~ s/::$//;
push(@subp,$p);
}
}
}
foreach my $p (@subp) {
delete_package_recurse($p);
}
Symbol::delete_package($package);
}
sub initialize_rndseed {
my ($safeeval)=@_;
my $rndseed;
my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
$rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
my $safeinit = '$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("<b>Unable to find <i>default_homework.lcpm</i></b>");
} else {
&Apache::run::run($default,$safeeval);
$Apache::lonxml::default_homework_loaded=1;
}
}
{
my $alarm_depth;
sub init_alarm {
alarm(0);
$alarm_depth=0;
}
sub start_alarm {
if ($alarm_depth<1) {
my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
if ($old) {
&Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
}
}
$alarm_depth++;
}
sub end_alarm {
$alarm_depth--;
if ($alarm_depth<1) { alarm(0); }
}
}
my $metamode_was;
sub startredirection {
if (!$Apache::lonxml::redirection) {
$metamode_was=$Apache::lonxml::metamode;
}
$Apache::lonxml::metamode=0;
$Apache::lonxml::redirection++;
push (@Apache::lonxml::outputstack, '');
}
sub endredirection {
if (!$Apache::lonxml::redirection) {
&Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
return '';
}
$Apache::lonxml::redirection--;
if (!$Apache::lonxml::redirection) {
$Apache::lonxml::metamode=$metamode_was;
}
pop @Apache::lonxml::outputstack;
}
sub in_redirection {
return ($Apache::lonxml::redirection > 0)
}
sub end_tag {
my ($tagstack,$parstack,$token)=@_;
pop(@$tagstack);
pop(@$parstack);
&decreasedepth($token);
}
sub initdepth {
@Apache::lonxml::depthcounter=();
undef($Apache::lonxml::last_depth_count);
}
my @timers;
my $lasttime;
# @Apache::lonxml::depthcounter -> count of tags that exist so
# far at each level
# $Apache::lonxml::last_depth_count -> when ascending, need to
# remember the count for the level below the current level (for
# example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
sub increasedepth {
my ($token) = @_;
push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
undef($Apache::lonxml::last_depth_count);
my $time;
if ($Apache::lonxml::debug eq "1") {
push(@timers,[&gettimeofday()]);
$time=&tv_interval($lasttime);
$lasttime=[&gettimeofday()];
}
my $spacing=' 'x($#Apache::lonxml::depthcounter);
$Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
# &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
#print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
}
sub decreasedepth {
my ($token) = @_;
if ( $#Apache::lonxml::depthcounter == -1) {
&Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
}
$Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
my ($timer,$time);
if ($Apache::lonxml::debug eq "1") {
$timer=pop(@timers);
$time=&tv_interval($lasttime);
$lasttime=[&gettimeofday()];
}
my $spacing=' 'x($#Apache::lonxml::depthcounter);
$Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
# &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
#print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
}
sub get_id {
my ($parstack,$safeeval)=@_;
my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
&error(&mt("ID "[_1]" contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
}
if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
return $id;
}
sub get_all_text_unbalanced {
#there is a copy of this in lonpublisher.pm
my($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')) {
if ($token->[0] eq 'T' && $token->[2]) {
$result.='<![CDATA['.$token->[1].']]>';
} else {
$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/is) {
($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
#&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
#&Apache::lonxml::debug('Result is :'.$1);
$redo=$tag.$redo;
&Apache::lonxml::newparser($pars,\$redo);
last;
}
}
return $result
}
=pod
For bubble grading mode and exam bubble printing mode, the tracking of
the current 'bubble line number' is stored in the %env element
'form.bubble_line_counter', and is modifed and handled by
the following routines.
The value of it is stored in $Apache:lonxml::bubble_line_counter when
live and stored back to env after done.
=item &increment_bubble_counter($increment)
Increments the bubble line counter by the optional value
$increment (defaults to 1).
'bad increments' are also treated as an increment of 1.
('bad' means <=0).
=cut
sub increment_bubble_counter {
my ($increment) = @_;
if (!defined($increment) || $increment le 0) {
$increment = 1;
}
$Apache::lonxml::bubble_line_counter += $increment;
$Apache::lonxml::bubble_line_counter_changed = 1;
}
=pod
=item &init_bubble_counter
Initialize the internal counter to the env. variable
or 1 if we are inconstruction space, or if the env var
is not defined.
=cut
sub init_bubble_counter {
if ($env{'request.state'} eq 'construct') {
$Apache::lonxml::bubble_line_counter = 1;
$Apache::lonxml::bubble_line_counter_changed = 1;
} elsif (defined($env{'form.bubble_line_counter'})) {
$Apache::lonxml::bubble_line_counter =
$env{'form.bubble_line_counter'};
$Aapche::lonxml::bubble_line_counter_changed = 0;
} else {
$Apache::lonxml::bubble_line_counter = 1;
$Apache::lonxml::bubble_line_counter_changed = 1;
}
}
=pod
=item store_bubble_counter;
Store the bubble line counter in its env var. The changed flag
is reset indicating the env is up to date with respect to the
local variable.
=cut
sub store_bubble_counter {
&Apache::lonnet::appenv(('form.bubble.counter' =>
$Apache::lonxml::bubble_line_counter));
$Apache::lonnet::bubble_line_counter_changed = 0;
return '';
}
=pod
The next set of subs allow a single level of save/restore for the
bubble_line_counter.
=cut
{
my $bubble_counter_state;
sub clear_bubble_counter {
undef($bubble_counter_state);
&Apache::lonnet::delenv('form.bubble_line_counter');
&Apache::lonxml::init_bubble_counter();
&Apache::lonxml::store_bubble_counter();
}
sub remember_bubble_counter {
&Apache::lonnet::transfer_profile_to_env(undef,undef, 1);
$bubble_counter_state = $env{'form.bubble_line_counter'};
}
sub restore_bubble_counter {
if (defined($bubble_counter_state)) {
&Apache::lonnet::appenv(('form.bubble_line_counter' =>
$bubble_counter_state));
}
}
sub get_bubble_counter {
if ($Apache::lonxml::bubble_line_counter_changed) {
&store_bubble_counter();
}
&Apache::lonnet::transfer_profile_to_env(undef, undef, 1);
return $env{'form.bubble_line_counter'};
}
}
=pod
For bubble grading mode and exam bubble printing mode, the tracking of
the current 'bubble line number' is stored in the %env element
'form.counter', and is modifed and handled by the following routines.
The value of it is stored in $Apache:lonxml::counter when live and
stored back to env after done.
=item &increment_counter($increment);
Increments the internal counter environment variable a specified amount
Optional Arguments:
$increment - amount to increment by (defaults to 1)
=cut
sub increment_counter {
my ($increment) = @_;
if (defined($increment) && $increment gt 0) {
$Apache::lonxml::counter+=$increment;
} else {
$Apache::lonxml::counter++;
}
$Apache::lonxml::counter_changed=1;
}
=pod
=item &init_counter;
Initialize the internal counter environment variable
=cut
sub init_counter {
if ($env{'request.state'} eq 'construct') {
$Apache::lonxml::counter=1;
$Apache::lonxml::counter_changed=1;
} elsif (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));
$Apache::lonxml::counter_changed=0;
return '';
}
{
my $state;
sub clear_problem_counter {
undef($state);
&Apache::lonnet::delenv('form.counter');
&Apache::lonxml::init_counter();
&Apache::lonxml::store_counter();
}
sub remember_problem_counter {
&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
$state = $env{'form.counter'};
}
sub restore_problem_counter {
if (defined($state)) {
&Apache::lonnet::appenv(('form.counter' => $state));
}
}
sub get_problem_counter {
if ($Apache::lonxml::counter_changed) { &store_counter() }
&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
return $env{'form.counter'};
}
}
sub get_all_text {
my($tag,$pars,$style)= @_;
my $gotfullstack=1;
if (ref($pars) ne 'ARRAY') {
$gotfullstack=0;
$pars=[$pars];
}
if (ref($style) ne 'HASH') {
$style={};
}
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')||($token->[0] eq 'D')) {
if ($token->[2]) {
$result.='<![CDATA['.$token->[1].']]>';
} else {
$result.=$token->[1];
}
} elsif ($token->[0] eq 'PI') {
$result.=$token->[2];
} elsif ($token->[0] eq 'S') {
if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
$result.=$token->[4];
} elsif ($token->[0] eq 'E') {
if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
#skip sending back the last end tag
if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
my $string=
'<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
$$style{'/'.$token->[1]}.
$token->[2].
'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
&Apache::lonxml::newparser($pars,\$string);
#&Apache::lonxml::debug("reParsing $string");
next;
}
if ($depth > -1) {
$result.=$token->[2];
} else {
$$pars[-1]->unget_token($token);
}
}
}
if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
if (($depth >=0) && ($#$pars > 0) ) {
pop(@$pars);
pop(@Apache::lonxml::pwd);
}
}
if ($top_empty && $depth >= 0) {
#never found the end tag ran out of text, throw error send back blank
&error('Never found end tag for <'.$tag.
'> current string <pre>'.
&HTML::Entities::encode($result,'<>&"').
'</pre>');
if ($gotfullstack) {
my $newstring='</'.$tag.'>'.$result;
&Apache::lonxml::newparser($pars,\$newstring);
}
$result='';
}
} else {
while ($#$pars > -1) {
while ($token = $$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')) {
if ($token->[2]) {
$result.='<![CDATA['.$token->[1].']]>';
} else {
$result.=$token->[1];
}
} elsif ($token->[0] eq 'PI') {
$result.=$token->[2];
} elsif ($token->[0] eq 'S') {
if ( $token->[1] =~ /^\Q$tag\E$/i) {
$$pars[-1]->unget_token($token); last;
} else {
$result.=$token->[4];
}
if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
} elsif ($token->[0] eq 'E') {
$result.=$token->[2];
}
}
if (($#$pars > 0) ) {
pop(@$pars);
pop(@Apache::lonxml::pwd);
} else { last; }
}
}
#&Apache::lonxml::debug("Exit:$result:");
return $result
}
sub newparser {
my ($parser,$contentref,$dir) = @_;
push (@$parser,HTML::LCParser->new($contentref));
$$parser[-1]->xml_mode(1);
$$parser[-1]->marked_sections(1);
if ( $dir eq '' ) {
push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
} else {
push (@Apache::lonxml::pwd, $dir);
}
}
sub parstring {
my ($token) = @_;
my (@vars,@values);
foreach my $attr (@{$token->[3]}) {
if ($attr!~/\W/) {
my $val=$token->[2]->{$attr};
$val =~ s/([\%\@\\\"\'])/\\$1/g;
$val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
$val =~ s/(\$)$/\\$1/;
#if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
push(@vars,"\$$attr");
push(@values,"\"$val\"");
}
}
my $var_init =
(@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
: '';
return $var_init;
}
sub extlink {
my ($res,$exact)=@_;
if (!$exact) {
$res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
}
push(@Apache::lonxml::extlinks,$res)
}
sub writeallows {
unless ($#extlinks>=0) { return; }
my $thisurl = &Apache::lonnet::clutter(shift);
if ($env{'httpref.'.$thisurl}) {
$thisurl=$env{'httpref.'.$thisurl};
}
my $thisdir=$thisurl;
$thisdir=~s/\/[^\/]+$//;
my %httpref=();
foreach (@extlinks) {
$httpref{'httpref.'.
&Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
}
@extlinks=();
&Apache::lonnet::appenv(%httpref);
}
sub register_ssi {
my ($url,%form)=@_;
push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
return '';
}
sub do_registered_ssi {
foreach my $info (@Apache::lonxml::ssi_info) {
my %form=%{ $info->{'form'}};
my $url=$info->{'url'};
&Apache::lonnet::ssi($url,%form);
}
}
sub add_script_result {
my ($display) = @_;
push(@script_var_displays, $display);
}
#
# 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/(\Q$matchthis\E)/\<font color=\"red\"\>$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/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
}
}
if ($env{'form.anchor'}) {
my $anchorname=$env{'form.anchor'};
my $matchthis=$anchorname;
$matchthis=~s/\_+/\\s\+/g;
$result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
$result.=(<<"ENDSCRIPT");
<script type="text/javascript">
document.location.hash='$anchorname';
</script>
ENDSCRIPT
}
return $result;
}
sub storefile {
my ($file,$contents)=@_;
&Apache::lonnet::correct_line_ends(\$contents);
if (my $fh=Apache::File->new('>'.$file)) {
print $fh $contents;
$fh->close();
return 1;
} else {
&warning("Unable to save file $file");
return 0;
}
}
sub createnewhtml {
my $title=&mt('Title of document goes here');
my $body=&mt('Body of document goes here');
my $filecontents=(<<SIMPLECONTENT);
<html>
<head>
<title>$title</title>
</head>
<body bgcolor="#FFFFFF">
$body
</body>
</html>
SIMPLECONTENT
return $filecontents;
}
sub createnewsty {
my $filecontents=(<<SIMPLECONTENT);
<definetag name="">
<render>
<web></web>
<tex></tex>
</render>
</definetag>
SIMPLECONTENT
return $filecontents;
}
sub inserteditinfo {
my ($filecontents,$filetype)=@_;
$filecontents = &HTML::Entities::encode($filecontents,'<>&"');
# my $editheader='<a href="#editsection">Edit below</a><hr />';
my $xml_help = '';
my $initialize='';
my $textarea_id = 'filecont';
my ($add_to_onload, $add_to_onresize);
my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
$initialize=&Apache::lonhtmlcommon::spellheader();
if ($filetype eq 'html'
&& (!&Apache::lonhtmlcommon::htmlareablocked() &&
&Apache::lonhtmlcommon::htmlareabrowser())) {
$textarea_id .= '_htmlarea';
$initialize.=(<<FULLPAGE);
<script type="text/javascript">
$addbuttons
HTMLArea.loadPlugin("FullPage");
function initDocument() {
var editor=new HTMLArea("filecont",config);
editor.registerPlugin(FullPage);
editor.generate();
setTimeout(
function () {
HTMLArea._addEvents(editor._doc,
["keypress","mousedown"], unClean);
editor._iframe.id = '$textarea_id';
resize_textarea('$textarea_id','LC_aftertextarea');
},300);
}
</script>
FULLPAGE
} else {
$initialize.=(<<FULLPAGE);
<script type="text/javascript">
$addbuttons
function initDocument() {
resize_textarea('$textarea_id','LC_aftertextarea');
}
</script>
FULLPAGE
}
$add_to_onload = 'initDocument();';
$add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
if ($filetype eq 'html') {
$xml_help=&Apache::loncommon::helpLatexCheatsheet();
}
my $cleanbut = '';
my $titledisplay=&display_title();
my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
'vi' => 'Save and View',
'dv' => 'Discard Edits and View',
'un' => 'undo',
'ed' => 'Edit');
my $buttons=(<<BUTTONS);
$cleanbut
<input type="submit" name="discardview" accesskey="d" value="$lt{'dv'}" />
<input type="submit" name="Undo" accesskey="u" value="$lt{'un'}" /><hr />
<input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" />
<input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
BUTTONS
$buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
my $textarea_events = &Apache::edit::element_change_detection();
my $form_events = &Apache::edit::form_change_detection();
my $editfooter=(<<ENDFOOTER);
$initialize
<hr />
<a name="editsection" />
<form $form_events method="post" name="xmledit">
$xml_help
<input type="hidden" name="editmode" value="$lt{'ed'}" />
$buttons<br />
<textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
<div id="LC_aftertextarea">
<br />$buttons
<br />
$titledisplay
</div>
</form>
</body>
ENDFOOTER
return ($editfooter,$add_to_onload,$add_to_onresize);;
}
sub get_target {
my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
if ( $env{'request.state'} eq 'published') {
if ( defined($env{'form.grade_target'})
&& ($viewgrades == 'F' )) {
return ($env{'form.grade_target'});
} elsif (defined($env{'form.grade_target'})) {
if (($env{'form.grade_target'} eq 'web') ||
($env{'form.grade_target'} eq 'tex') ) {
return $env{'form.grade_target'}
} else {
return 'web';
}
} else {
return 'web';
}
} elsif ($env{'request.state'} eq 'construct') {
if ( defined($env{'form.grade_target'})) {
return ($env{'form.grade_target'});
} else {
return 'web';
}
} else {
return 'web';
}
}
sub handler {
my $request=shift;
my $target=&get_target();
$Apache::lonxml::debug=$env{'user.debug'};
&Apache::loncommon::content_type($request,'text/html');
&Apache::loncommon::no_cache($request);
if ($env{'request.state'} eq 'published') {
$request->set_last_modified(&Apache::lonnet::metadata($request->uri,
'lastrevisiondate'));
}
$request->send_http_header;
return OK if $request->header_only;
my $file=&Apache::lonnet::filelocation("",$request->uri);
my $filetype;
if ($file =~ /\.sty$/) {
$filetype='sty';
} else {
$filetype='html';
}
#
# Edit action? Save file.
#
if (!($env{'request.state'} eq 'published')) {
if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
my $html_file=&Apache::lonnet::getfile($file);
my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
}
}
my %mystyle;
my $result = '';
my $filecontents=&Apache::lonnet::getfile($file);
if ($filecontents eq -1) {
my $start_page=&Apache::loncommon::start_page('File Error');
my $end_page=&Apache::loncommon::end_page();
my $fnf=&mt('File not found');
$result=(<<ENDNOTFOUND);
$start_page
<b>$fnf: $file</b>
$end_page
ENDNOTFOUND
$filecontents='';
if ($env{'request.state'} ne 'published') {
if ($filetype eq 'sty') {
$filecontents=&createnewsty();
} else {
$filecontents=&createnewhtml();
}
$env{'form.editmode'}='Edit'; #force edit mode
}
} else {
unless ($env{'request.state'} eq 'published') {
if ($filecontents=~/BEGIN LON-CAPA Internal/) {
&Apache::lonxml::error(&mt('This file appears to be a rendering of a LON-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
}
#
# we are in construction space, see if edit mode forced
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['editmode']);
}
if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
&Apache::structuretags::reset_problem_globals();
$result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
'',%mystyle);
# .html files may contain <problem> or <Task> need to clean
# up if it did
&Apache::structuretags::reset_problem_globals();
&Apache::lonhomework::finished_parsing();
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['rawmode']);
if ($env{'form.rawmode'}) { $result = $filecontents; }
if ($filetype eq 'sty') {
my $controls =
($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
: '';
my %options = ('bgcolor' => '#FFFFFF');
$result =
&Apache::loncommon::start_page(undef,undef,\%options).
$controls.
$result.
&Apache::loncommon::end_page();
}
}
}
#
# Edit action? Insert editing commands
#
unless ($env{'request.state'} eq 'published') {
if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
{
my ($edit_info, $add_to_onload, $add_to_onresize)=
&inserteditinfo($filecontents,$filetype);
my $displayfile=$request->uri;
$displayfile=~s/^\/[^\/]*//;
my %options =
('add_entries' =>
{'onresize' => $add_to_onresize,
'onload' => $add_to_onload, });
if ($env{'environment.remote'} ne 'off') {
$options{'bgcolor'} = '#FFFFFF';
$options{'only_body'} = 1;
}
my $js =
&Apache::edit::js_change_detection().
&Apache::loncommon::resize_textarea_js();
my $start_page = &Apache::loncommon::start_page(undef,$js,
\%options);
$result=$start_page.
&Apache::lonxml::message_location().'<h3>'.
$displayfile.
'</h3>'.
$edit_info.
&Apache::loncommon::end_page();
}
}
if ($filetype eq 'html') { &writeallows($request->uri); }
&Apache::lonxml::add_messages(\$result);
$request->print($result);
return OK;
}
sub display_title {
my $result;
if ($env{'request.state'} eq 'construct') {
my $title=&Apache::lonnet::gettitle();
if (!defined($title) || $title eq '') {
$title = $env{'request.filename'};
$title = substr($title, rindex($title, '/') + 1);
}
$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
}
return $result;
}
sub debug {
if ($Apache::lonxml::debug eq "1") {
$|=1;
my $request=$Apache::lonxml::request;
if (!$request) {
eval { $request=Apache->request; };
}
if (!$request) {
eval { $request=Apache2::RequestUtil->request; };
}
$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
#&Apache::lonnet::logthis($_[0]);
}
}
sub show_error_warn_msg {
if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
return 1;
}
return (($Apache::lonxml::debug eq 1) ||
($env{'request.state'} eq 'construct') ||
($Apache::lonhomework::browse eq 'F'
&&
$env{'form.show_errors'} eq 'on'));
}
sub error {
my @errors = @_;
$errorcount++;
if (defined($Apache::inputtags::part)) {
if ( @Apache::inputtags::response ) {
push(@errors,
&mt("This error occurred while processing response [_1] in part [_2]",
$Apache::inputtags::response[-1],
$Apache::inputtags::part));
} else {
push(@errors,
&mt("This error occurred while processing part [_1]",
$Apache::inputtags::part));
}
}
if ( &show_error_warn_msg() ) {
# If printing in construction space, put the error inside <pre></pre>
push(@Apache::lonxml::error_messages,
$Apache::lonxml::warnings_error_header.
"<b>ERROR:</b>".join("<br />\n",@errors)."<br />\n");
$Apache::lonxml::warnings_error_header='';
} else {
my $errormsg;
my ($symb)=&Apache::lonnet::symbread();
if ( !$symb ) {
#public or browsers
$errormsg=&mt("An error occured while processing this resource. The author has been notified.");
}
my $host=$Apache::lonnet::perlvar{'lonHostID'};
push(@errors, "The error occurred on host <tt>$host</tt>");
my $msg = join('<br />', @errors);
#notify author
&Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
#notify course
if ( $symb && $env{'request.course.id'} ) {
my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
my $baseurl = &Apache::lonnet::clutter($declutter);
my @userlist;
foreach (keys %users) {
my ($user,$domain) = split(/:/, $_);
push(@userlist,"$user\@$domain");
my $key=$declutter.'_'.$user.'_'.$domain;
my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
[$key],
$cdom,$cnum);
my $now=time;
if ($now-$lastnotified{$key}>86400) {
my $title = &Apache::lonnet::gettitle($symb);
my $sentmessage;
&Apache::lonmsg::user_normal_msg($user,$domain,
"Error [$title]",$msg,'',$baseurl,'','',
\$sentmessage,$symb,$title,1);
&Apache::lonnet::put('nohist_xmlerrornotifications',
{$key => $now},
$cdom,$cnum);
}
}
if ($env{'request.role.adv'}) {
$errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
} else {
$errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
}
}
push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
}
}
sub warning {
$warningcount++;
if ($env{'form.grade_target'} ne 'tex') {
if ( &show_error_warn_msg() ) {
push(@Apache::lonxml::warning_messages,
$Apache::lonxml::warnings_error_header.
"<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
$Apache::lonxml::warnings_error_header='';
}
}
}
sub info {
if ($env{'form.grade_target'} ne 'tex'
&& $env{'request.state'} eq 'construct') {
push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
}
}
sub message_location {
return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
}
sub add_messages {
my ($msg)=@_;
my $result=join(' ',
@Apache::lonxml::info_messages,
@Apache::lonxml::error_messages,
@Apache::lonxml::warning_messages);
undef(@Apache::lonxml::info_messages);
undef(@Apache::lonxml::error_messages);
undef(@Apache::lonxml::warning_messages);
$$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
$$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
}
sub get_param {
my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
if ( ! $context ) { $context = -1; }
my $args ='';
if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
if ( ! $Apache::lonxml::usestyle ) {
$args=$Apache::lonxml::style_values.$args;
}
if ( ! $args ) { return undef; }
if ( $case_insensitive ) {
if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
return &Apache::run::run("{$args;".'return $'.$param.'}',
$safeeval); #'
} else {
return undef;
}
} else {
if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
return &Apache::run::run("{$args;".'return $'.$param.'}',
$safeeval); #'
} else {
return undef;
}
}
}
sub get_param_var {
my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
if ( ! $context ) { $context = -1; }
my $args ='';
if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
if ( ! $Apache::lonxml::usestyle ) {
$args=$Apache::lonxml::style_values.$args;
}
&Apache::lonxml::debug("Args are $args param is $param");
if ($case_insensitive) {
if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
return undef;
}
} elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
&Apache::lonxml::debug("first run is $value");
if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
&Apache::lonxml::debug("doing second");
my @result=&Apache::run::run("return $value",$safeeval,1);
if (!defined($result[0])) {
return $value
} else {
if (wantarray) { return @result; } else { return $result[0]; }
}
} else {
return $value;
}
}
sub register_insert_xml {
my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
.'/insertlist.xml');
my ($tagnum,$in_help)=(0,0);
my @alltags;
my $tag;
while (my $token = $parser->get_token()) {
if ($token->[0] eq 'S') {
my $key;
if ($token->[1] eq 'tag') {
$tag = $token->[2]{'name'};
$insertlist{"$tagnum.tag"} = $tag;
$insertlist{"$tag.num"} = $tagnum;
push(@alltags,$tag);
} elsif ($in_help && $token->[1] eq 'file') {
$key = $tag.'.helpfile';
} elsif ($in_help && $token->[1] eq 'description') {
$key = $tag.'.helpdesc';
} elsif ($token->[1] eq 'description' ||
$token->[1] eq 'color' ||
$token->[1] eq 'show' ) {
$key = $tag.'.'.$token->[1];
} elsif ($token->[1] eq 'insert_sub') {
$key = $tag.'.function';
} elsif ($token->[1] eq 'help') {
$in_help=1;
} elsif ($token->[1] eq 'allow') {
$key = $tag.'.allow';
}
if (defined($key)) {
$insertlist{$key} = $parser->get_text();
$insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
}
} elsif ($token->[0] eq 'E') {
if ($token->[1] eq 'tag') {
undef($tag);
$tagnum++;
} elsif ($token->[1] eq 'help') {
undef($in_help);
}
}
}
# parse the allows and ignore tags set to <show>no</show>
foreach my $tag (@alltags) {
next if (!exists($insertlist{"$tag.allow"}));
my $allow = $insertlist{"$tag.allow"};
foreach my $element (split(',',$allow)) {
$element =~ s/(^\s*|\s*$ )//gx;
if (!exists($insertlist{"$element.show"})
|| $insertlist{"$element.show"} ne 'no') {
push(@{ $insertlist{$tag.'.which'} },$element);
}
}
}
}
sub register_insert {
return ®ister_insert_xml(@_);
# &dump_insertlist('2');
}
sub dump_insertlist {
my ($ext) = @_;
open(XML,">/tmp/insertlist.xml.$ext");
print XML ("<insertlist>");
my $i=0;
while (exists($insertlist{"$i.tag"})) {
my $tag = $insertlist{"$i.tag"};
print XML ("
\t<tag name=\"$tag\">");
if (defined($insertlist{"$tag.description"})) {
print XML ("
\t\t<description>".$insertlist{"$tag.description"}."</description>");
}
if (defined($insertlist{"$tag.color"})) {
print XML ("
\t\t<color>".$insertlist{"$tag.color"}."</color>");
}
if (defined($insertlist{"$tag.function"})) {
print XML ("
\t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
}
if (defined($insertlist{"$tag.show"})
&& $insertlist{"$tag.show"} ne 'yes') {
print XML ("
\t\t<show>".$insertlist{"$tag.show"}."</show>");
}
if (defined($insertlist{"$tag.helpfile"})) {
print XML ("
\t\t<help>
\t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
if ($insertlist{"$tag.helpdesc"} ne '') {
print XML ("
\t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
}
print XML ("
\t\t</help>");
}
if (defined($insertlist{"$tag.which"})) {
print XML ("
\t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
}
print XML ("
\t</tag>");
$i++;
}
print XML ("\n</insertlist>\n");
close(XML);
}
sub description {
my ($token)=@_;
my $tag = &get_tag($token);
return $insertlist{$tag.'.description'};
}
# Returns a list containing the help file, and the description
sub helpinfo {
my ($token)=@_;
my $tag = &get_tag($token);
return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
}
sub get_tag {
my ($token)=@_;
my $tagnum;
my $tag=$token->[1];
foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
my $testtag = $namespace.'::'.$tag;
$tagnum = $insertlist{"$testtag.num"};
last if (defined($tagnum));
}
if (!defined($tagnum)) {
$tagnum = $Apache::lonxml::insertlist{"$tag.num"};
}
return $insertlist{"$tagnum.tag"};
}
1;
__END__
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