# The LearningOnline Network with CAPA # definition of tags that give a structure to a document # 2/19 Guy # 6/26/2001 fixed extra web display at end of tags package Apache::structuretags; use strict; use Apache::lonnet; sub 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 $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,$parser,$safeeval); my $head_tag_start=''.&Apache::lonxml::registerurl(); my $body_tag_start=' or the neccesary stuff to start XML/MathML my ($result,$head_tag_start,$body_tag_start)= &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval); if ($target eq 'web' || $target eq 'grade') { ($status,$datemsg) = &Apache::lonhomework::check_date('0'); push (@Apache::inputtags::status,$status); my $expression='$external::datestatus="'.$status.'";'; $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";'; &Apache::run::run($expression,$safeeval); if ( $status eq 'CLOSED' ) { my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]); if ( $target eq "web" ) { $result.= $head_tag_start.''; return $result . $body_tag_start . "
Problem is not open to be viewed. The problem $datemsg
"; } } } if ($target eq 'web') { 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; if ($status eq 'CAN_ANSWER') { # create a page header and exit $result.="$head_tag_start$name\n $body_tag_start\n
". ''; if ($ENV{'request.state'} eq "construct") { $result.='
'; } return $result; } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') { return $result.$head_tag_start."$name\n$body_tag_start\n"; } } if ($target eq 'edit') { $result.=$head_tag_start."".$body_tag_start. '

'; my $temp=&Apache::edit::insertlist($target,$token); $result.=$temp; return $result; } if ($target eq 'modified') { $result=$token->[4]; $result.=&Apache::edit::handle_insert(); return $result; } return ''; } sub end_problem { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; my $result=''; my $status=$Apache::inputtags::status['-1']; if ($target eq 'grade' || $target eq 'web' ) { if ( $target eq 'grade' && $Apache::inputtags::part eq '0' && $status eq 'CAN_ANSWER') { # if part is zero, no s existed, so we need to the grading &Apache::inputtags::grade; } elsif ($Apache::inputtags::part eq '0') { # if part is zero, no s existed, so we need show the current # grading status $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part); } if ($target eq 'web') { if ($status eq 'CAN_ANSWER') { $result.="\n"; } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') { $result.="\n"; } $result.=&Apache::lonxml::xmlend(); } } if ($target eq 'meta') { if ($Apache::inputtags::part eq '0') { $result=&Apache::response::mandatory_part_meta; } } if ($target eq 'edit') { &Apache::lonxml::debug("in end_problem with $target, edit"); $result='
'; } return $result; } sub start_library { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; my ($result,$head_tag_start,$body_tag_start)= &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval); if ($target eq 'edit') { $result.=$head_tag_start."".$body_tag_start. '

'; my $temp=&Apache::edit::insertlist($target,$token); $result.=$temp; return $result; } if ($target eq 'modified') { $result=$token->[4]; $result.=&Apache::edit::handle_insert(); return $result; } return ''; } sub end_library { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; my $result=''; if ($target eq 'edit') { $result='
'; } return $result; } sub start_block { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; if ($target eq 'web' || $target eq 'grade') { my $code = @$parstack[$#$parstack]; $code =~ s/\"//g; $code .=';return $condition;'; # print "
$code
"; 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=$$parser[$#$parser]->get_text("/while"); push( @Apache::structuretags::whilebody, $bodytext); if ( $result ) { &Apache::lonxml::newparser($parser,\$bodytext); } return ""; } sub end_while { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; my $code = pop @Apache::structuretags::whileconds; my $bodytext = pop @Apache::structuretags::whilebody; my $result = &Apache::run::run($code,$safeeval); if ( $result ) { &Apache::lonxml::newparser($parser,\$bodytext); } return ""; } # # .. # .. # .. # ... # sub start_randomlist { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; my $body= &Apache::lonxml::get_all_text("/randomlist",$$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]"."$list_item"."[1]>"; push(@randomlist,$list_item); # print "
START-TAG $b_tok->[1], $b_tok->[4], $list_item"; } if($b_tok->[0] eq 'T') { # text # what to do with text in between tags? # print "TEXT $b_tok->[1]
"; } # if($b_tok->[0] eq 'E') { # end tag, should not happen # print "END-TAG $b_tok->[1]
"; # } } my @idx_arr = (0 .. $#randomlist); &Apache::structuretags::shuffle(\@idx_arr); my $bodytext = ''; for(0 .. $#randomlist) { $bodytext .= "$randomlist[ $idx_arr[$_] ]"; } &Apache::lonxml::newparser($parser,\$bodytext); return ""; } sub shuffle { my $a=shift; my $i; &Apache::response::setrandomnumber(); for($i=@$a;--$i;) { my $j=int rand($i+1); next if $i == $j; @$a[$i,$j] = @$a[$j,$i]; } } sub end_randomlist { return ''; } sub start_part { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 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' || $target eq 'grade') { my ($status,$datemsg) = &Apache::lonhomework::check_date($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",$$parser[$#$parser]); if ( $target eq "web" ) { return "
Part is not open to be viewed. It $datemsg
"; } } } return ''; } sub end_part { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; &Apache::lonxml::debug("in end_part $target "); my $status=$Apache::inputtags::status['-1']; pop @Apache::inputtags::status; if ( $target eq 'meta' ) { return ''; } if ( $target eq 'grade' && $status eq 'CAN_ANSWER') { return &Apache::inputtags::grade; } if ($target eq 'web') { return &Apache::inputtags::gradestatus($Apache::inputtags::part); } return ''; } sub start_preduedate { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; if ($target eq 'web' || $target eq 'grade') { if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' && $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) { &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]); } } return ''; } sub end_preduedate { return ''; } sub start_postanswerdate { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; if ($target eq 'web' || $target eq 'grade') { if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') { &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]); } } return ''; } sub end_postanswerdate { return ''; } sub start_notsolved { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; if ($target eq 'web' || $target eq 'grade') { my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"}; &Apache::lonxml::debug("not solved has :$gradestatus:"); if ($gradestatus =~ /^correct/) { &Apache::lonxml::debug("skipping"); &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]); } } return ''; } sub end_notsolved { return ''; } sub start_solved { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; if ($target eq 'web' || $target eq 'grade') { 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[$#$parser]); $result.=&Apache::edit::start_table($token)."Text Block Delete:". &Apache::edit::deletelist($target,$token) ." ". &Apache::edit::insertlist($target,$token). " \n". &Apache::edit::editfield($token->[1],$text,"",50,4); } if ($target eq 'modified') { $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']); $result=''.&Apache::edit::modifiedfield(); } return $result; } sub start_endouttext { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; my $result=''; if ($target eq "edit" ) { $result="".&Apache::edit::end_table()."\n"; } if ($target eq "modified") { $result=''; } return $result; } sub end_endouttext { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; my @result=('',''); if ($target eq "edit" || $target eq 'modified') { @result=('','no'); } return (@result); } sub delete_startouttext { my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']); my $text=$$parser['-1']->get_text("/endouttext"); my $token=$$parser['-1']->get_token(); &Apache::lonxml::debug("Deleting :$text: and :$token->[0]:$token->[1]:$token->[2]: for startouttext"); &Apache::lonxml::end_tag($tagstack,$parstack,$token); # Deleting 2 parallel tag pairs, but we need the numbers later to look like # they did the last time round &Apache::lonxml::increasedepth($token); &Apache::lonxml::decreasedepth($token); return 1; } 1; __END__