loncom/xml/lontexconvert.pm - view

File: [LON-CAPA] / loncom / xml / lontexconvert.pm
Revision 1.37: download - view: text, annotated - select for diffs
Tue May 25 06:11:49 2004 UTC (19 years, 11 months ago) by albertel
Branches: MAIN
CVS tags: version_1_2_X, version_1_2_1, version_1_2_0, version_1_1_99_5, version_1_1_99_4, version_1_1_99_3, version_1_1_99_2, version_1_1_99_1, version_1_1_99_0, HEAD

- if there are any errors at all when doing tth kill the apache child
  - BUG#3030

# The LearningOnline Network with CAPA # TeX Conversion Module # # $Id: lontexconvert.pm,v 1.37 2004/05/25 06:11:49 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. # # 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer # 5/4 Gerd Kortemeyer package Apache::lontexconvert; use strict; use tth(); use vars qw($errorstring); use Apache(); use Apache::lonmsg(); use Apache::lonxml(); use Apache::lonmenu(); use Apache::lonlocal; # ====================================================================== Header sub init_tth { my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'}; if ($ENV{'browser.mathml'}) { &tth::ttminit(); if ($ENV{'browser.unicode'}) { &tth::ttmoptions('-L -u1 '.$options); } else { &tth::ttmoptions('-L -u0 '.$options); } } else { &tth::tthinit(); if ($ENV{'browser.unicode'}) { &tth::tthoptions('-L -u1 '.$options); } else { &tth::tthoptions('-L -u0 '.$options); } } } sub header { $errorstring=''; my $time=time; &init_tth(); return &Apache::lonxml::xmlbegin(). &Apache::lonxml::fontsettings(). "\n<head>\n". &Apache::lonmenu::registerurl(undef,'tex'). "\n</head>\n"; } # ================================================================== Conversion $Apache::lontexconvert::messedup=0; # we need this routine because &converted can get called from inside # of the safespace (through &xmlparse('<m>stuff</m>') which doesn't # allow the opcode for alarm, so we need to compile this before we get # into the safe space since opcode checks only occur at compile time sub convert_real { my ($texstring)=@_; my ($xmlstring,$errorstring); local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; }; local $SIG{ALRM}=sub { &Apache::lonnet::logthis("ALRM"); $xmlstring='['.&mt("TeX unconverted due to errors").']'; $Apache::lontexconvert::messedup=1; die &mt("TeX unconverted due to errors"); }; alarm($Apache::lonnet::perlvar{'lonScriptTimeout'}); if ($ENV{'browser.mathml'}) { $xmlstring=&tth::ttm($$texstring); $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g; $xmlstring=~s/\<br\>/\<br\/\>/g; $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g; $errorstring.=&tth::ttmerror(); } else { $xmlstring=&tth::tth($$texstring); $errorstring.=&tth::ttherror(); $xmlstring=~s-</font(\s*)>-</font>-g; } $xmlstring=~s/^\s*//; $xmlstring=~s/\s*$//; alarm(0); return ($xmlstring,$errorstring); } sub converted { my $texstring=shift; my $xmlstring='['.&mt('UNDISPLAYABLE').']'; if ($Apache::lontexconvert::messedup) { return '['.&mt('TeX unconverted due to previous errors').']'; } eval(<<'ENDCONV'); ($xmlstring,$errorstring)=&convert_real($texstring) ENDCONV if ($@) { $errorstring.=&mt("Evaluation Error: ").$@; $Apache::lontexconvert::messedup=1; } if ($Apache::lontexconvert::messedup || &tth::tthmessedup() || $errorstring) { &Apache::lonnet::logthis("Trying to kill myself"); $Apache::lontexconvert::messedup=1; my $request=Apache->request(); $request->child_terminate(); } return $xmlstring; } # ====================================================================== Footer sub footer { my $xmlstring=''; if ($ENV{'request.state'} eq 'construct') { $xmlstring.='<address>'.$errorstring.'</address>'; } else { &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring); } # -------------------------------------------------------------------- End Body $xmlstring.=&Apache::lonxml::xmlend(); return $xmlstring; } # ------------------------------------------------------------ Message display sub to_convert { my ($string) = @_; $string=~s/\<br\s*\/?\>/ /gs; # $string=~s/\s/ /gs; $string=&HTML::Entities::decode($string); return &converted(\$string); } sub smiley { my $expression=shift; if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; } my %smileys=('\:\-\)' => 'smiley', '8\-\)' => 'coolsmile', '8\-(I|\|)' => 'coolindiff', ':\-(I|\|)' => 'neutral', '\:\-(o|O|)' => 'shocked', ':\-$' => 'frowny', '\;\-$' => 'wink', '\:\-P' => 'baeh', '\:\-(\\\|\\/)' => 'hrrm', '\:\-D' => 'bigsmile', '\:\-C' => 'angry', '\:(\'|\`)\-\(' => 'cry', '\:\-(X|\#)' => 'lipsrsealed', '\:\-S' => 'huh'); my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'}; foreach (keys %smileys) { $expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs; } return $expression; } sub msgtexconverted { my $message=shift; my $email=shift; $errorstring=''; &init_tth(); my $outmessage=''; my $tex=0; foreach (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) { if ($tex) { if ($email) { $outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0; } else { $outmessage.=&to_convert($_); $tex=0; } } else { $outmessage.=&smiley($_); $tex=1; } } if (wantarray) { return ($outmessage,$errorstring); } else { return $outmessage.$errorstring; } } 1; __END__