# The LearningOnline Network with CAPA
# definition of tags that give a structure to a document
#
# $Id: structuretags.pm,v 1.115 2002/09/23 17:19:24 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/
#
# 2/19 Guy
# 6/26/2001 fixed extra web display at end of <web></web> tags
# 8/17,8/18,8/20 Gerd Kortemeyer
package Apache::structuretags;
use strict;
use Apache::lonnet;
use Apache::File();
BEGIN {
&Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
# &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
}
sub start_web {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
if ($target eq 'web') {
return $bodytext;
}
return '';
}
sub end_web {
return '';
}
sub start_tex {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
if ($target eq 'tex') {
return $bodytext.' ';
}
return '';
}
sub end_tex {
return '';
}
sub page_start {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my %found;
foreach my $taginside ($tagstack) {
foreach my $taglookedfor ('html','body','form') {
if ($taginside =~ /^$taglookedfor$/i) { $found{$taglookedfor} = 1; }
}
}
my $result;
my $head_tag_start;
if (!defined($found{'html'})) {
$result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,
$parser,$safeeval);
$head_tag_start='<head>'.&Apache::lonxml::registerurl(undef,$target);
}
my $body_tag_start;
if (!defined($found{'body'})) {
$body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
'onUnload="'.&Apache::lonxml::unloadevents().'" ';
my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);
if ($background) {
$Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
$background;
$body_tag_start.='background="'.$background.'" ';
} else {
my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
if ($bgcolor) {
$body_tag_start.='bgcolor="'.$bgcolor.'" ';
} else {
$body_tag_start.='bgcolor="#ffffff"';
}
}
$body_tag_start.='>';
}
my $form_tag_start;
if (!defined($found{'form'})) {
$form_tag_start='<form name="lonhomework" method="POST" action="'.
$ENV{'request.uri'}.'">';
}
return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
}
sub get_resource_name {
my ($parstack,$safeeval)=@_;
my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
if ($name eq '') {
$name=&Apache::lonnet::EXT('resource.title');
if ($name eq 'con_lost') { $name = ''; }
}
$Apache::lonhomework::name=$name;
return $name;
}
sub setup_rndseed {
my ($safeeval)=@_;
my $rndseed;
if ($ENV{'request.state'} eq "construct") {
$rndseed=$ENV{'form.rndseed'};
if (!$rndseed) {
$rndseed=time;
$ENV{'form.rndseed'}=$rndseed;
}
&Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
}
return $rndseed;
}
sub problem_edit_header {
return '<input type="hidden" name="submitted" value="edit" />
<input type="hidden" name="problemmode" value="Edit" />
<input type="submit" name="problemmode" value="Discard Edits and View" />
<input type="submit" name="problemmode" value="EditXML" />
<input type="submit" name="Undo" value="undo" /> <hr />
<input type="submit" name="submit" value="Submit Changes" />
<input type="submit" name="submit" value="Submit Changes and View" /><br />
';
}
sub problem_edit_footer {
return '<br /><input type="submit" name="submit" value="Submit Changes and Edit" />
<input type="submit" name="submit" value="Submit Changes and View" />';
}
sub problem_web_to_edit_header {
my ($rndseed)=@_;
my $result.='<input type="hidden" name="problemmode" value="View" />
<input type="submit" name="problemmode" value="Edit" />
<input type="submit" name="problemmode" value="EditXML" />
Random Seed:<input type="text" name="rndseed" width="10" value="'.
$rndseed.'" />
<input type="submit" name="changerandseed" value="Change" />
<input type="submit" name="resetdata" value="Reset Submissions" />
<input type="checkbox" name="showallfoils" ';
if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
$result.= ' /> Show All Foils
<hr />';
}
sub initialize_storage {
%Apache::lonhomework::results=();
my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
if ($ENV{'request.state'} eq 'construct') {
%Apache::lonhomework::history=
&Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
my ($temp)=keys %Apache::lonhomework::history ;
&Apache::lonxml::debug("Return message of $temp");
} else {
%Apache::lonhomework::history=
&Apache::lonnet::restore($symb,$courseid,$domain,$name);
}
#ignore error conditions
my ($temp)=keys %Apache::lonhomework::history ;
if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
}
# -------------------------------------------------------------finalize_storage
# Stores away the result has to a student's environment
# checks form.grade_ for specific values, other wises stores
# to the running users environment
sub finalize_storage {
my $result;
my ($temp) = keys %Apache::lonhomework::results;
if ( $temp ne '' ) {
my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
if ($ENV{'request.state'} eq 'construct') {
$result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
$ENV{'request.uri'},'',$domain,$name);
&Apache::lonxml::debug('Construct Store return message:'.$result);
} else {
$result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
$symb,$courseid,$domain,$name);
&Apache::lonxml::debug('Store return message:'.$result);
}
}
return $result;
}
sub checkout_msg {
return (<<ENDCHECKOUT);
<h2>The resource needs to be checked out</h2>
As a resource gets checked out, a unique timestamped ID is given to it, and a
permanent record is left in the system.<p />
<font color=red>
Checking out resources is subject to course policies, and may exclude future
credit even if done erroneously.<p />
</font>
<form name="checkout" method="POST" action="$ENV{'request.uri'}">
<input type="hidden" name="doescheckout" value="yes" />
<input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
</form>
ENDCHECKOUT
}
sub start_problem {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
# meta is called from lonpublisher, which doesn't uses the normal
# lonhomework method of parsing the file which means that inputtags
# won't get reset
if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
&Apache::lonxml::error('Only one problem allowed in a .problem file');
my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[-1]);
return '';
}
#intialize globals
$Apache::inputtags::part='0';
@Apache::inputtags::responselist = ();
@Apache::inputtags::previous=();
if ($target ne 'analyze') {
&initialize_storage();
if ($target eq 'web') {
&Apache::lonhomework::showhash(%Apache::lonhomework::history);
}
$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
}
if ($Apache::lonhomework::type eq '') {
my $uri=$ENV{'request.uri'};
if ($uri=~/\.(\w+)$/) {
$Apache::lonhomework::type=$1;
&Apache::lonxml::debug("Using type of $1");
} else {
$Apache::lonhomework::type='problem';
&Apache::lonxml::debug("Using default type, problem, :$uri:");
}
}
#added vars to the scripting enviroment
my $expression='$external::part='.$Apache::inputtags::part.';';
&Apache::run::run($expression,$safeeval);
my $status;
my $accessmsg;
#should get back a <html> or the neccesary stuff to start XML/MathML
my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) { $result = '';}
if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
#handle exam checkout
if ($Apache::lonhomework::type eq 'exam') {
my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
if (($ENV{'form.doescheckout'}) && (!$token)) {
$token=&Apache::lonxml::maketoken();
$Apache::lonhomework::history{"resource.0.outtoken"}=$token;
}
$body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
}
#handle rand seed in construction space
my $rndseed=&setup_rndseed($safeeval);
($status,$accessmsg) = &Apache::lonhomework::check_access('0');
push (@Apache::inputtags::status,$status);
my $expression='$external::datestatus="'.$status.'";';
$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
&Apache::run::run($expression,$safeeval);
if (( $status eq 'CLOSED' ) ||
( $status eq 'UNCHECKEDOUT') ||
( $status eq 'BANNED')) {
my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
if ( $target eq "web" ) {
$result.= $head_tag_start.'</head>';
my $msg=$body_tag_start.
'<h1>Not open to be viewed</h1>';
if ($status eq 'CLOSED') {
$msg.='The problem '.$accessmsg;
} elsif ($status eq 'UNCHECKEDOUT') {
$msg.=&checkout_msg;
}
$result.=$msg.'<br />';
}
} elsif ($target eq 'web') {
my $name= &get_resource_name($parstack,$safeeval);
if ($status eq 'CAN_ANSWER') {
# create a page header and exit
$result.="$head_tag_start<title>$name</title></head>
$body_tag_start \n $form_tag_start".
'<input type="hidden" name="submitted" value="yes" />';
if ($ENV{'request.state'} eq "construct") {
$result.= &problem_web_to_edit_header($rndseed);
}
# if we are viewing someone else preserve that info
if (defined $ENV{'form.grade_symb'}) {
foreach my $field ('symb','courseid','domain','username') {
$result .= '<input type="hidden" name="grade_'.$field.
'" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
}
}
} elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
|| $status eq 'CLOSED') {
$result.=$head_tag_start.
"<title>$name</title></head>\n$body_tag_start\n";
}
} elsif ($target eq 'tex') {
my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
if ($name eq '') {
$name=&Apache::lonnet::EXT('resource.title');
if ($name eq 'con_lost') { $name = ''; }
}
$Apache::lonhomework::name=$name;
my $id = $Apache::inputtags::part;
my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
$duedate = POSIX::strftime("%c",localtime($duedate));
my $temp_file;
my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
if (-e $filename) {
$temp_file = Apache::File->new($filename);
} else {
$temp_file = Apache::File->new('>>'.$filename);
}
my @due_file_content = <$temp_file>;
my $due_file_content = $due_file_content[$#due_file_content];
chomp $due_file_content;
if ($due_file_content ne $duedate) {
$temp_file = Apache::File->new('>'.$filename);
print $temp_file "$duedate\n";
if (not $ENV{'request.symb'} =~ m/\.page_/) {
if(not $duedate=~m/1969/) {
$result .= '\begin{document} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm';
} else {
$result .= '\begin{document} \noindent \vskip 1 mm';
}
} else {
$result .= '\parbox{\minipagewidth}{\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
}
} else {
if (not $ENV{'request.symb'} =~ m/\.page_/) {
$result .= '\begin{document} \noindent \vskip 1 mm';
} else {
$result .= '\parbox{\minipagewidth}{\vskip 1mm \\\\\\\\';
}
}
}
} elsif ($target eq 'edit') {
$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
&problem_edit_header();
my $temp=&Apache::edit::insertlist($target,$token);
$result.=$temp;
} elsif ($target eq 'modified') {
$result=$token->[4];
$result.=&Apache::edit::handle_insert();
} else {
# page_start returned a starting result, delete it if we don't need it
$result = '';
}
return $result;
}
sub end_problem {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result='';
my $status=$Apache::inputtags::status['-1'];
if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {
if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
# if part is zero, no <part>s existed, so we need to the grading
&Apache::inputtags::grade;
} elsif ( ($target eq 'web' || $target eq 'tex') && $Apache::inputtags::part eq '0' &&
$status ne 'UNCHECKEDOUT') {
# if part is zero, no <part>s existed, so we need show the current
# grading status
my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part);
#FIXME this is ugly we should just generate tex in inputtags
if ($target eq 'tex') { $gradestatus=&html_to_tex($gradestatus); }
$result.= $gradestatus;
}
if (
(($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
($target eq 'answer') || ($target eq 'tex')
) {
if ($status eq 'CAN_ANSWER') {
if ($target ne 'tex') {
$result.="</form></body>\n";
}
} elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
$status eq 'UNCHECKEDOUT' ) {
if ($target ne 'tex') {
$result.="</body>\n";
}
}
if ($target ne 'tex') {
$result.=&Apache::lonxml::xmlend();
} else {
$result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
if (not $ENV{'request.symb'} =~ m/\.page_/) {
$result .= '\end{document} ';
} else {
$result .= '} ';
}
}
}
if ($target eq 'grade') {
&Apache::lonhomework::showhash(%Apache::lonhomework::results);
&finalize_storage();
}
} elsif ($target eq 'meta') {
if ($Apache::inputtags::part eq '0') {
$result=&Apache::response::mandatory_part_meta;
}
} elsif ($target eq 'edit') {
&Apache::lonxml::debug("in end_problem with $target, edit");
$result = &problem_edit_footer();
}
return $result;
}
#FIXME I am ugly shoot me
sub html_to_tex {
my ($string)=@_;
$string =~ s/<table>//;
$string =~ s/<\/table>//;
$string =~ s/<tr([^>]*)>//g;
$string =~ s/<\/tr>//g;
$string =~ s/<td([^>]*)>//g;
$string =~ s/<\/td>//g;
$string =~ s/<b>/\\textbf{/g;
$string =~ s/<\/b>/}/g;
$string =~ s/<br \/>/\\vskip 0 mm /g;
$string =~ s/<input([^>]*)>//g;
return $string;
}
sub start_library {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
if ($target eq 'edit') {
($result,$head_tag_start,$body_tag_start,$form_tag_start)=
&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
&problem_edit_header();
my $temp=&Apache::edit::insertlist($target,$token);
$result.=$temp;
} elsif ($target eq 'modified') {
$result=$token->[4];
$result.=&Apache::edit::handle_insert();
} elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
$ENV{'request.state'} eq "construct" ) {
($result,$head_tag_start,$body_tag_start,$form_tag_start)=
&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
my $name=&get_resource_name($parstack,$safeeval);
my $rndseed=&setup_rndseed($safeeval);
$result.="$head_tag_start<title>$name</title></head>
$body_tag_start \n $form_tag_start".
'<input type="hidden" name="submitted" value="yes" />';
$result.=&problem_web_to_edit_header($rndseed);
}
return $result;
}
sub end_library {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result='';
if ($target eq 'edit') {
$result=&problem_edit_footer();
} elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
$ENV{'request.state'} eq "construct") {
$result.='</form></body>'.&Apache::lonxml::xmlend();
}
return $result;
}
sub start_block {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
my $code = @$parstack[$#$parstack];
$code =~ s/\"//g;
$code .=';return $condition;';
# print "<br />$code<br />";
my $result = &Apache::run::run($code,$safeeval);
&Apache::lonxml::debug("block :$code: returned :$result:");
if ( ! $result ) {
my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
&Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
}
}
return "";
}
sub end_block {
return '';
}
sub start_while {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $code = @$parstack[$#$parstack];
$code =~ s/\"//g;
$code .=';return $condition;';
push( @Apache::structuretags::whileconds, $code);
my $result = &Apache::run::run($code,$safeeval);
my $bodytext=$$parser[$#$parser]->get_text("/while");
push( @Apache::structuretags::whilebody, $bodytext);
if ( $result ) {
&Apache::lonxml::newparser($parser,\$bodytext);
}
return "";
}
sub end_while {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $code = pop @Apache::structuretags::whileconds;
my $bodytext = pop @Apache::structuretags::whilebody;
my $result = &Apache::run::run($code,$safeeval);
if ( $result ) {
&Apache::lonxml::newparser($parser,\$bodytext);
}
return "";
}
# <randomlist show="1">
# <tag1>..</tag1>
# <tag2>..</tag2>
# <tag3>..</tag3>
# ...
# </randomlist>
sub start_randomlist {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result;
if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
$target eq 'tex') {
my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
my $b_parser= HTML::TokeParser->new(\$body);
my $b_tok;
my @randomlist;
my $list_item;
while($b_tok = $b_parser->get_token() ) {
if($b_tok->[0] eq 'S') { # start tag
# get content of the tag until matching end tag
# get all text upto the matching tag
# and push the content into @randomlist
$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
push(@randomlist,$list_item);
# print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
}
if($b_tok->[0] eq 'T') { # text
# what to do with text in between tags?
# print "<b>TEXT $b_tok->[1]</b><br />";
}
# if($b_tok->[0] eq 'E') { # end tag, should not happen
# print "<b>END-TAG $b_tok->[1]</b><br />";
# }
}
my @idx_arr = (0 .. $#randomlist);
&Apache::structuretags::shuffle(\@idx_arr);
my $bodytext = '';
my $show=$#randomlist;
my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
$showarg--;
if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
for(0 .. $show) {
$bodytext .= "$randomlist[ $idx_arr[$_] ]";
}
&Apache::lonxml::newparser($parser,\$bodytext);
} elsif ($target eq 'edit' ) {
$result .= &Apache::edit::tag_start($target,$token);
$result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$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,
'show');
if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
}
return $result;
}
sub shuffle {
my $a=shift;
my $i;
if (defined(@$a)) {
&Apache::response::setrandomnumber();
for($i=@$a;--$i;) {
my $j=int rand($i+1);
next if $i == $j;
@$a[$i,$j] = @$a[$j,$i];
}
}
}
sub end_randomlist {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result;
if ($target eq 'edit' ) {
$result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
}
return $result;
}
sub start_part {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result='';
my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
if ($id eq '') { $id = $Apache::lonxml::curdepth; }
$Apache::inputtags::part=$id;
@Apache::inputtags::responselist = ();
@Apache::inputtags::previous=();
if ($target eq 'meta') {
return &Apache::response::mandatory_part_meta;
} elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
push (@Apache::inputtags::status,$status);
my $expression='$external::datestatus="'.$status.'";';
$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
&Apache::run::run($expression,$safeeval);
if ( $status eq 'CLOSED' ) {
my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
if ( $target eq "web" ) {
$result="<br />Part is not open to be viewed. It $accessmsg<br />";
} elsif ( $target eq 'tex' ) {
$result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
}
} else {
if ($target eq 'tex') {
$result='\vskip 0 mm';
}
}
}
return $result;
}
sub end_part {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
&Apache::lonxml::debug("in end_part $target ");
my $status=$Apache::inputtags::status['-1'];
pop @Apache::inputtags::status;
if ( $target eq 'meta' ) { return ''; }
if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
return &Apache::inputtags::grade;
}
if ($target eq 'web' || $target eq 'tex' ) {
my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part);
#FIXME this is ugly we should just generate tex in inputtags
if ($target eq 'tex') { $gradestatus=&html_to_tex($gradestatus); }
return $gradestatus;
}
return '';
}
sub start_preduedate {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
$Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
&Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
}
}
return '';
}
sub end_preduedate {
return '';
}
sub start_postanswerdate {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
&Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
}
} elsif ($target eq 'tex') {
return '\vskip 0 mm \noindent';
}
return '';
}
sub end_postanswerdate {
return '';
}
sub start_notsolved {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
&Apache::lonxml::debug("not solved has :$gradestatus:");
if ($gradestatus =~ /^correct/) {
&Apache::lonxml::debug("skipping");
&Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
}
}
return '';
}
sub end_notsolved {
return '';
}
sub start_solved {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
if ($gradestatus !~ /^correct/) {
&Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
}
}
return '';
}
sub end_solved {
return '';
}
sub start_startouttext {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my @result=(''.'');
if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
return (@result);
}
sub end_startouttext {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result='';
my $text='';
if ($target eq 'edit') {
$text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
$result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
<td>Delete:".
&Apache::edit::deletelist($target,$token)
."</td>
<td>".
&Apache::edit::insertlist($target,$token).
&Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
&Apache::edit::editfield($token->[1],$text,"",50,4);
}
if ($target eq 'modified') {
$text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
$result='<startouttext />'.&Apache::edit::modifiedfield();
}
if ($target eq 'tex') {
$result .= '\noindent ';
}
return $result;
}
sub start_endouttext {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my $result='';
if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
if ($target eq "modified") { $result='<endouttext />'; }
return $result;
}
sub end_endouttext {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
my @result=('','');
if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
return (@result);
}
sub delete_startouttext {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
# my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
my $text=$$parser['-1']->get_text("/endouttext");
my $ntoken=$$parser['-1']->get_token();
&Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
&Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
# Deleting 2 parallel tag pairs, but we need the numbers later to look like
# they did the last time round
&Apache::lonxml::increasedepth($ntoken);
&Apache::lonxml::decreasedepth($ntoken);
return 1;
}
1;
__END__
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