File:
[LON-CAPA] /
loncom /
xml /
scripttag.pm
Revision
1.147:
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Sat Nov 17 01:51:11 2007 UTC (16 years, 9 months ago) by
albertel
Branches:
MAIN
CVS tags:
version_2_7_0,
version_2_6_X,
version_2_6_99_1,
version_2_6_99_0,
version_2_6_3,
version_2_6_2,
version_2_6_1,
version_2_6_0,
version_2_5_99_1,
version_2_5_99_0,
HEAD
- BUG#5523 - close then open the window so the correct size is applied
# The LearningOnline Network with CAPA
# <script> definiton
#
# $Id: scripttag.pm,v 1.147 2007/11/17 01:51:11 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/
#
package Apache::scripttag;
use strict;
use Apache::lonnet;
use Apache::lonlocal;
use Apache::style();
#Globals
# this used to pass around the standard callsub arguments to a tag func
# so xmlparse can reenter the inner_xmlparse loop.
@Apache::scripttag::parser_env = ();
BEGIN {
&Apache::lonxml::register('Apache::scripttag',
('script','scriptlib','parserlib','import',
'window','display','storetc','physnet',
'standalone','comment','num','parse','algebra',
'LONCAPA_INTERNAL_TURN_STYLE_ON',
'LONCAPA_INTERNAL_TURN_STYLE_OFF',
'LONCAPA_INTERNAL_LONHTTPD_PORT'));
}
sub start_LONCAPA_INTERNAL_TURN_STYLE_ON {
$Apache::lonxml::usestyle=1;
$Apache::lonxml::style_values='';
return ('','no');
}
sub end_LONCAPA_INTERNAL_TURN_STYLE_ON {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $end=&Apache::lonxml::get_param('end',$parstack,$safeeval);
if (defined($end)) {
&Apache::lonxml::end_tag($tagstack,$parstack,$token);
}
return ('','no');
}
sub start_LONCAPA_INTERNAL_TURN_STYLE_OFF {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
$Apache::lonxml::usestyle=0;
my $end=&Apache::lonxml::get_param('end',$parstack,$safeeval);
if (!$end) {
$Apache::lonxml::style_values=$$parstack[-1];
$Apache::lonxml::style_end_values=$$parstack[-1];
} else {
$Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
$Apache::lonxml::style_end_values='';
}
return ('','no');
}
sub end_LONCAPA_INTERNAL_TURN_STYLE_OFF {
return ('','no');
}
=pod
=item start_LONCAPA_INTERNAL_LONHTTPD_PORT
emits a pice of javascript that says a global js variable to the
current lonhttp port, currently used by the remote control to find out
where to load images from
=cut
sub start_LONCAPA_INTERNAL_LONHTTPD_PORT {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'web' || $target eq 'webgrade') {
return '<script type="text/javascript">var lonhttpdport=\''.
&Apache::loncommon::lonhttpd_port().'\';</script>';
}
return ('','no');
}
sub end_LONCAPA_INTERNAL_LONHTTPD_PORT {
return ('','no');
}
sub start_script {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
@Apache::scripttag::parser_env = @_;
my $result='';
my $type= &Apache::lonxml::get_param('type',$parstack,$safeeval);
&Apache::lonxml::debug("found type of $type");
if ($type eq "loncapa/perl") {
if ( $target eq "modified" ) {
$result=$token->[4].&Apache::edit::modifiedfield('/script',$parser);
} elsif ( $target eq 'web' || $target eq 'tex' ||
$target eq 'grade' || $target eq 'webgrade' ||
$target eq 'answer' || $target eq 'analyze' ) {
my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
if (!$Apache::lonxml::default_homework_loaded) {
&Apache::lonxml::default_homework_load($safeeval);
}
&Apache::run::run($bodytext,$safeeval);
if (($target eq 'answer') &&
($env{'form.answer_output_mode'} ne 'tex') &&
($Apache::lonhomework::viewgrades == 'F')) {
$Apache::lonxml::evaluate--;
my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
my $start_page =
&Apache::loncommon::start_page('Script Vars', undef,
{'only_body' => 1,
'bgcolor' => '#FFFFFF',
'js_ready' => 1,});
my $end_page =
&Apache::loncommon::end_page({'js_ready' => 1,});
$uname =~s/\W//g;
$udom =~s/\W//g;
my $function_name =
join('_','LONCAPA_scriptvars',$uname,$udom,
$env{'form.counter'},$Apache::lonxml::curdepth);
my $script_var ="<script type=\"text/javascript\">
// <![CDATA[
function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>";
my $listing=&Apache::run::dump($target,$safeeval);
$listing=~s/\\/\\\\/g;
$listing=~s/\'/\\\'/g;
$script_var.=$listing;
$script_var.= "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
// ]]>
</script><a href=\"javascript:$function_name();void(0);\">".&mt('Script Vars')."</a><br />";
&Apache::lonxml::add_script_result($script_var);
}
} elsif ($target eq "edit" ) {
#&Apache::run::run($bodytext,$safeeval);
#$result="<br /> <$token->[1]> output: <br />$bodytext<br />Source:<br />";
my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
$result=&Apache::edit::tag_start($target,$token,'Script');
$result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4);
} elsif ($target eq 'meta') {
my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
}
} else {
my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
if ($target ne "meta" && $target ne 'tex' && $target ne 'answer') {
$result = $token->[4];
$result.=$bodytext;
}
}
return $result;
}
sub end_script {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ( $target eq "meta" ) { return ''; }
my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
my $result='';
#other script blocks need to survive
if ($type ne "loncapa/perl" && $target ne 'tex') {
return $token->[2];
} elsif ($target eq 'edit' ) {
return &Apache::edit::end_table();
} elsif ($target eq 'answer') {
$Apache::lonxml::evaluate++;
}
return '';
}
sub start_display {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
@Apache::scripttag::parser_env = @_;
my $result;
if ( $target eq "modified" ) {
$result=$token->[4].&Apache::edit::modifiedfield("/display",$parser);
} elsif ( $target eq 'web' || $target eq 'tex' ||
$target eq 'grade' || $target eq 'webgrade' ||
$target eq 'answer' || $target eq 'analyze') {
my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
if (!$Apache::lonxml::default_homework_loaded) {
&Apache::lonxml::default_homework_load($safeeval);
}
$result=&Apache::run::run($bodytext,$safeeval);
if ($target eq 'grade' || $target eq 'answer' ||
$target eq 'analyze') {
# grade/answer/analyxe should produce no output but if we
# are redirecting, the redirecter should know what to do
# with the output
if (!$Apache::lonxml::redirection) { $result=''; }
}
$Apache::lonxml::post_evaluate=0;
} elsif ($target eq "edit" ) {
my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
#$result =
# "<br /> <$token->[1]> output: <br />$bodytext<br />Source:<br />";
#$result.=&Apache::edit::editfield($token->[1],$bodytext,'',40,1);
$result=&Apache::edit::tag_start($target,$token,'Script With Display');
$result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,1)
} elsif ($target eq 'meta') {
my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
}
return $result;
}
sub end_display {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
return '';
}
sub start_scriptlib {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $bodytext;
my $result ='';
my $error='';
if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
$target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
$target eq 'analyze' || $target eq 'webgrade') {
$bodytext=$$parser[$#$parser]->get_text("/scriptlib");
$bodytext=&Apache::run::evaluate($bodytext,$safeeval,
$$parstack[$#$parstack]);
my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
$bodytext);
my $script=&Apache::lonnet::getfile($location);
if ($script == -1) {
if ($target eq 'edit') {
$error='</tr><tr><td>'.&mt('Errors').'</td><td colspan="2"><b>'.&mt(' Unable to find [_1]','<span class="LC_filename">'.$location.'</span>').'</b></td>'."\n";
} else {
&Apache::lonxml::error("<b> Unable to find <i>$location</i> for scriptlib</b>");
return "";
}
}
&Apache::run::run($script,$safeeval);
#&Apache::lonxml::debug("ran $bodytext:<br />".&Apache::lonnet::getfile($bodytext)."<br />");
}
if ($target eq "edit" ) {
$result=
&Apache::edit::tag_start($target,$token,'New Script Functions').
&Apache::edit::editline($token->[1],$bodytext,'scriptlib',40).
&Apache::edit::browse(undef,'textnode').
$error.'</td></tr>'.
&Apache::edit::end_table();
}
if ($target eq "modified" ) {
$result=$token->[4].&Apache::edit::modifiedfield("/scriptlib",$parser);
}
return $result;
}
sub end_scriptlib {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my @result;
if ($target eq "edit" ) { $result[1]='no'; }
return @result;
}
sub start_parserlib {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $bodytext;
my $result ="";
my $error='';
if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
$target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
$target eq 'analyze' || $target eq 'webgrade') {
$bodytext=$$parser[$#$parser]->get_text("/parserlib");
$bodytext=&Apache::run::evaluate($bodytext,$safeeval,
$$parstack[$#$parstack]);
my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
$bodytext);
my $styletext=&Apache::lonnet::getfile($location);
#&Apache::lonxml::debug("found :$bodytext: in :$location: with :$styletext:");
if ($styletext == -1) {
if ($target eq 'edit') {
$error='</tr><tr><td>Errors</td><td colspan="2"><b> Unable to find <i>'.$location.'</i></b></td>'."\n";
} else {
&Apache::lonxml::error("<b> Unable to find <i>$location</i> for parserlib</b>");
return "";
}
}
%$style = ( %$style , &Apache::style::styleparser($target,$styletext));
}
if ($target eq "edit" ) {
$result=
&Apache::edit::tag_start($target,$token,'New Tag Definitions').
&Apache::edit::editline($token->[1],$bodytext,'',40).
$error.'</td></tr>'.
&Apache::edit::end_table();
}
if ($target eq "modified" ) {
$result=$token->[4].&Apache::edit::modifiedfield("/parserlib",$parser);
}
return $result;
}
sub end_parserlib {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my @result;
if ($target eq "edit" ) { $result[1]='no'; }
return @result;
}
sub start_window {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
if ($target eq 'web' || $target eq 'webgrade') {
&Apache::lonxml::startredirection;
} elsif ($target eq 'tex') {
$result = '\unskip\footnote{';
} elsif ($target eq 'edit') {
$result.=&Apache::edit::tag_start($target,$token);
$result.=&Apache::edit::text_arg('Text of Link:','linktext',$token,70);
$result.=&Apache::edit::text_arg('Height:','height',$token,5);
$result.=&Apache::edit::text_arg('Width:','width',$token,5);
$result.=&Apache::edit::text_arg('Mime Type:','mimetype',$token,5);
$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
} elsif ($target eq 'modified') {
my $constructtag=&Apache::edit::get_new_args($token,$parstack,
$safeeval,'linktext',
'width','height',
'mimetype');
if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
}
return $result;
}
sub end_window {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
if ($target eq 'web' || $target eq 'webgrade') {
my $output=&Apache::lonxml::endredirection;
$output =~ s/[\n\r]/ /g;
# $output = &HTML::Entities::encode($output,'<>&"\'');
$output =~ s/\'/\\\'/g;
my $linktext= &Apache::lonxml::get_param('linktext',$parstack,$safeeval);
if (!$linktext) { $linktext='<sup>*</sup>'; }
my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
if (!$width) { $width='500'; }
my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
if (!$height) { $height='200'; }
my $mimetype= &Apache::lonxml::get_param('mimetype',$parstack,$safeeval)
|| 'text/html';
my ($start_page,$end_page);
if ($mimetype eq 'text/html') {
$start_page =
&Apache::loncommon::start_page($linktext, undef,
{'only_body' => 1,
'bgcolor' => '#FFFFFF',
'js_ready' => 1,});
$end_page =
&Apache::loncommon::end_page({'js_ready' => 1,});
}
$result = "<script type=\"text/javascript\">
//<!--
function LONCAPA_newwindow_$Apache::lonxml::curdepth() {
newWindow=open(".&Apache::lonhtmlcommon::javascript_nothing().",'new_W');
newWindow.close();
newWindow=open(".&Apache::lonhtmlcommon::javascript_nothing().",'new_W','width=$width,height=$height,scrollbars=1');
newWindow.".&Apache::lonhtmlcommon::javascript_docopen($mimetype).";
newWindow.document.writeln('$start_page $output $end_page');
newWindow.document.close();}
//-->
</script><a href=\"javascript:LONCAPA_newwindow_$Apache::lonxml::curdepth();void(0);\">$linktext</a>";
} elsif ($target eq 'tex') {
$result = '}';
} else {
$result = '';
}
return $result;
}
sub start_import {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $bodytext=$$parser[$#$parser]->get_text("/import");
my $result ="";
$bodytext=Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
if ($target eq 'web' || $target eq 'webgrade' || $target eq 'grade'
|| $target eq 'answer' || $target eq 'tex' || $target eq 'analyze' ) {
# FIXME this probably needs to be smart about construction vs.
# non construction space.
my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
my $file=&Apache::lonnet::getfile($location);
if ($file == -1) {
&Apache::lonxml::error("<b> Unable to find <i>$bodytext as $location</i> for import</b>");
return "";
}
my $dir=$location;
$dir=~s:/[^/]*$::;
# &Apache::lonxml::debug("directory $dir $location file $file \n<b>END</b>\n");
my $id= &Apache::lonxml::get_id($parstack,$safeeval);
if (!$id) { $id=$Apache::lonxml::curdepth; }
push(@Apache::inputtags::import,$id);
push(@Apache::inputtags::importlist,$id);
&Apache::lonxml::newparser($parser,\$file,$dir);
} elsif ($target eq "edit" ) {
$result.=&Apache::edit::tag_start($target,$token);
$result.=&Apache::edit::editline($token->[1],$bodytext,'',40);
$result.=&Apache::edit::browse(undef,'textnode');
#FIXME this need to convert $bodytext to be a contruction space reference
#my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
#$result.="Click<a href=\"$location\">here</a> to edit<br />"
} elsif ($target eq 'modified') {
$result=$token->[4].&Apache::edit::modifiedfield("/import",$parser);
} elsif ($target eq 'meta') {
my $id= &Apache::lonxml::get_id($parstack,$safeeval);
$result.='<import part="'.$Apache::inputtags::part;
if ($id) {
$result.='" id="'.$id;
}
$result.='">';
$result.=$bodytext;
$result.='</import>';
}
return $result;
}
sub end_import {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
pop(@Apache::inputtags::import);
my $result;
if ($target eq 'edit' ) { $result=&Apache::edit::end_row.
&Apache::edit::end_table(); }
return $result;
}
sub start_storetc {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result = '';
&Apache::lonxml::startredirection;
return $result;
}
sub end_storetc {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
my $output=&Apache::lonxml::endredirection;
$output =~ s/\"/\"\;/g;
$result = '{\bf '.$output.'.}}\write\tcfile{\protect\tcpc{ '.$output.'.}{\the\value{relpage}}}';
return $result;
}
sub start_physnet {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $bodytext = '/adm/includes/physnet.sty';
my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
my $cbistyletext=&Apache::lonnet::getfile($location);
%$style = (%$style,&Apache::style::styleparser($target,$cbistyletext));
$$parser['-1']->unget_token($token);
# if ( defined($$style{'physnet'}) ) {
# &Apache::lonxml::newparser($parser,\$$style{'physnet'});
# }
return "";
}
sub end_physnet {
return '';
}
sub start_standalone {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web' || $target eq 'webgrade') {
if ( $env{'request.course.id'} ) {
my $inside = &Apache::lonxml::get_all_text("/standalone",$parser,$style);
} else {
$result='<table bgcolor="#E1E1E1" border="2"><tr><td>';
}
}
return $result;
}
sub end_standalone {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'web' || $target eq 'webgrade' ) {
if ( $env{'request.course.id'} ) {
} else {
$result='</td></tr></table>';
}
}
return $result;
}
sub start_comment {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result='';
if ($target eq 'edit') {
$result=&Apache::edit::tag_start($target,$token);
my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
$result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4)
} elsif ( $target eq 'modified') {
$result=$token->[4].&Apache::edit::modifiedfield("/comment",$parser);
} elsif ( $target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
$target eq 'answer' || $target eq 'meta' || $target eq 'analyze' ||
$target eq 'webgrade') {
#normally throw away comments
my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
}
return $result;
}
sub end_comment {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
return '';
}
sub xmlparse {
my ($string) = @_;
&Apache::lonxml::debug("xmlparse recursion starting with $string");
# Apache::run::evaluate does an 'eval' on the name of the subroutine
# if it detects something that looks like a subroutine, this ends up calling
# things without any arguments and since perl is nice enough to pass
# along the default arguments when you don't explicitly say no arguments
# if you call &xmlparse, it gets &xmlparse passed as it argument.
# Same thing soccurs with &chemparse.
if ($string eq '&xmlparse') { return '&xmlparse'; }
if ($string eq '&chemparse') { return '&chemparse'; }
my ($target,$token,$tagstack,$parstack,$oldparser,$safeeval,$style)=
@Apache::scripttag::parser_env;
my @parser;
&Apache::lonxml::newparser(\@parser,\$string);
&Apache::lonxml::startredirection();
my $result=&Apache::lonxml::inner_xmlparse($target,$tagstack,
$parstack,\@parser,
$safeeval,$style);
$result.=&Apache::lonxml::endredirection();
&Apache::lonxml::debug("target is $target xmlparse recursion ending with $result");
return $result;
}
sub start_num {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
my $result = '';
my $inside = &Apache::lonxml::get_all_text_unbalanced("/num",$parser);
if ($target eq 'tex' || $target eq 'web' || $target eq 'webgrade') {
$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
if (!$Apache::lonxml::default_homework_loaded) {
&Apache::lonxml::default_homework_load($safeeval);
}
@Apache::scripttag::parser_env = @_;
my $format=&Apache::lonxml::get_param('format',$parstack,$safeeval);
$result=&Apache::run::run("return &prettyprint(q\0$inside\0,q\0$format\0);",$safeeval);
}
return $result;
}
sub end_num {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
my $result = '';
return $result;
}
sub start_parse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
my $result = '';
if ( $target eq 'web' || $target eq 'tex' ||
$target eq 'grade' || $target eq 'answer' ||
$target eq 'analyze'|| $target eq 'webgrade') {
my $inside = &Apache::lonxml::get_all_text_unbalanced("/parse",$parser);
$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
if (!$Apache::lonxml::default_homework_loaded) {
&Apache::lonxml::default_homework_load($safeeval);
}
@Apache::scripttag::parser_env = @_;
$result=&Apache::run::run("return &xmlparse(q\0$inside\0);",$safeeval);
if ($target eq 'grade' || $target eq 'answer' ||
$target eq 'analyze') {
# grade/answer/analyxe should produce no output but if we
# are redirecting, the redirecter should know what to do
# with the output
if (!$Apache::lonxml::redirection) { $result=''; }
}
}
return $result;
}
sub end_parse {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
my $result = '';
return $result;
}
sub start_algebra {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
my $result = '';
if ( $target eq 'web' || $target eq 'tex' ||
$target eq 'grade' || $target eq 'answer' ||
$target eq 'analyze' || $target eq 'webgrade') {
my $inside = &Apache::lonxml::get_all_text_unbalanced("/algebra",$parser);
$inside = &Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
my $style=&Apache::lonxml::get_param('style',$parstack,$safeeval);
$result=&Apache::lontexconvert::algebra($inside,$target,$style);
}
$Apache::lonxml::post_evaluate=0;
}
return $result;
}
sub end_algebra {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
my $result = '';
return $result;
}
1;
__END__
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