Annotation of loncom/homework/structuretags.pm, revision 1.61

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.33      albertel    3: # 2/19 Guy
1.44      ng          4: # 6/26/2001 fixed extra web display at end of <web></web> tags
1.60      www         5: # 8/17,8/18,8/20 Gerd Kortemeyer
1.54      www         6: 
1.1       albertel    7: package Apache::structuretags; 
                      8: 
                      9: use strict;
                     10: use Apache::lonnet;
                     11: 
                     12: sub BEGIN {
1.48      albertel   13:   &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
1.37      albertel   14: #  &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
1.10      albertel   15: }
                     16: 
                     17: sub start_web {
1.40      albertel   18:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.10      albertel   19:   my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
1.19      albertel   20:   if ($target eq 'web') {
                     21:     return $bodytext;
                     22:   } 
                     23:   return '';
1.10      albertel   24: }
                     25: 
                     26: sub end_web {
1.44      ng         27:     return '';
1.10      albertel   28: }
                     29: 
                     30: sub start_tex {
1.40      albertel   31:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.10      albertel   32:   my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
1.19      albertel   33:   if ($target eq 'tex') {
                     34:     return $bodytext
                     35:   }
1.10      albertel   36:   return '';
                     37: }
                     38: 
                     39: sub end_tex {
1.44      ng         40:     return '';
1.9       albertel   41: }
                     42: 
1.48      albertel   43: sub page_start {
                     44:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                     45:   my $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,$parser,$safeeval);
                     46:   my $head_tag_start='<head>'.&Apache::lonxml::registerurl();
                     47:   my $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
1.50      albertel   48: 	  'onUnload="'.&Apache::lonxml::unloadevents().'" ';
                     49:   my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);
                     50:   if ($background) {
                     51:     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
                     52:                                         $background;
                     53:     $body_tag_start.='background="'.$background.'" ';
                     54:   } else {
                     55:     my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
                     56:     if ($bgcolor) {
                     57:       $body_tag_start.='bgcolor="'.$bgcolor.'" ';
                     58:     } else {
                     59:       $body_tag_start.='bgcolor="#ffffff"';
                     60:     }
                     61:   }
                     62:   $body_tag_start.='>';
1.48      albertel   63:   return ($result,$head_tag_start,$body_tag_start);
                     64: }
                     65: 
1.9       albertel   66: sub start_problem {
1.40      albertel   67:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel   68: 
                     69: #intialize globals
                     70:   $Apache::inputtags::part='0';
                     71:   @Apache::inputtags::responselist = ();
1.51      albertel   72:   @Apache::inputtags::previous=();
1.42      albertel   73:   $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
                     74:   &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
                     75:   if ($Apache::lonhomework::type eq '') {
1.53      albertel   76:     my $uri=$ENV{'request.uri'};
                     77:     if ($uri=~/\.(\w+)$/) {
                     78:       $Apache::lonhomework::type=$1;
                     79:       &Apache::lonxml::debug("Using type of $1");
                     80:     } else {
                     81:       $Apache::lonhomework::type='problem';
                     82:       &Apache::lonxml::debug("Using default type, problem, :$uri:");
                     83:     }
1.42      albertel   84:   }
1.58      www        85: 
1.19      albertel   86: #adeed vars to the scripting enviroment
                     87:   my $expression='$external::part='.$Apache::inputtags::part.';';
                     88:   &Apache::run::run($expression,$safeeval);
1.22      albertel   89:   my $status;
1.55      www        90:   my $accessmsg;
1.36      albertel   91: 
1.41      albertel   92:   #should get back a <html> or the neccesary stuff to start XML/MathML
1.48      albertel   93:   my ($result,$head_tag_start,$body_tag_start)=
                     94:     &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.36      albertel   95: 
1.58      www        96:   if ($Apache::lonhomework::type eq 'exam') {
                     97:       if ($target eq 'web') {
                     98:           my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
                     99:           if (($ENV{'form.doescheckout'}) && (!$token)) {
                    100: 	     $token=&Apache::lonxml::maketoken();
1.61    ! www       101:              $Apache::lonhomework.history{"resource.0.outtoken"}=$token;
1.58      www       102:           }
                    103:           $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
                    104:       }
                    105:       if ($target eq 'meta') {
1.59      www       106:      
1.58      www       107: 	  return (<<ENDSTORES);
                    108: <stores part="0" name="outtoken" type="string" 
1.59      www       109:  display="Document ID checked out"></stores>
1.58      www       110: <stores part="0" name="checkouttime" type="date"
1.59      www       111:  display="Time checked out"></stores>
1.58      www       112: <stores part="0" name="outremote" type="string" 
1.59      www       113:  display="Client IP checked out from"></stores>
1.58      www       114: 
                    115: <stores part="0" name="intoken" type="string" 
1.59      www       116:  display="Document ID checked in"></stores>
1.58      www       117: <stores part="0" name="checkintime" type="date"
1.59      www       118:  display="Time checked in"></stores>
1.58      www       119: <stores part="0" name="inremote" type="string" 
1.59      www       120:  display="Client IP checked in from"></stores>
1.58      www       121: ENDSTORES
1.57      www       122:       }
                    123:   }
1.34      albertel  124:   if ($target eq 'web' || $target eq 'grade') {
1.55      www       125:     ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
1.22      albertel  126:     push (@Apache::inputtags::status,$status);
1.24      albertel  127:     my $expression='$external::datestatus="'.$status.'";';
                    128:     $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    129:     &Apache::run::run($expression,$safeeval);
1.54      www       130:     if (( $status eq 'CLOSED' ) ||
                    131:         ( $status eq 'UNCHECKEDOUT') ||
                    132:         ( $status eq 'BANNED')) {
1.21      albertel  133:       my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
                    134:       if ( $target eq "web" ) {
1.41      albertel  135: 	$result.= $head_tag_start.'</head>';
1.54      www       136:         my $msg=$body_tag_start.
                    137: 	    '<h1>Not open to be viewed</h1>';
                    138:         if ($status eq 'CLOSED') {
1.55      www       139: 	    $msg.='The problem '.$accessmsg;
1.54      www       140: 	} elsif ($status eq 'UNCHECKEDOUT') {
1.56      www       141:             $msg.=(<<ENDCHECKOUT);
                    142: <h2>The resource needs to be checked out</h2>
                    143: As a resource gets checked out, a unique timestamped ID is given to it, and a
                    144: permanent record is left in the system.<p />
                    145: <font color=red>
                    146: Checking out resources is subject to course policies, and may exclude future
                    147: credit even if done erroneously.<p />
                    148: </font>  
                    149: <form method=post>
1.60      www       150: <input type=button name="doescheckout" 
                    151: value="Check out Exam for Viewing" 
                    152: onClick="if (confirm('Check out Exam?')) { this.form.submit(); }" />
1.56      www       153: </form>
                    154: ENDCHECKOUT
1.54      www       155:         }
                    156: 	return $result.$msg.'<br />';
1.21      albertel  157:       }
1.41      albertel  158:     }
1.21      albertel  159:   }
1.19      albertel  160:   if ($target eq 'web') {
1.39      albertel  161:     my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
1.30      albertel  162:     if ($name eq '') { 
                    163:       $name=&Apache::lonnet::EXT('resource.title');
                    164:       if ($name eq 'con_lost') { $name = ''; }
                    165:     }
                    166:     $Apache::lonhomework::name=$name;
1.22      albertel  167:     if ($status eq 'CAN_ANSWER') {
                    168:       # create a page header and exit
1.41      albertel  169:       $result.="$head_tag_start<title>$name</title></head>\n
                    170:               $body_tag_start\n
1.36      albertel  171:               <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
                    172: 		'<input type="hidden" name="submitted" value="yes" />';
                    173:       if ($ENV{'request.state'} eq "construct") {
                    174: 	$result.='<input type="hidden" name="problemmode" value="View" />
                    175:                  <input type="submit" name="problemmode" value="Edit" /><hr />';
                    176:       }
                    177:       return $result;
1.29      albertel  178:     } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
1.41      albertel  179:       return $result.$head_tag_start."<title>$name</title></head>\n$body_tag_start\n";
1.22      albertel  180:     }
                    181:   }
1.34      albertel  182:   if ($target eq 'edit') {
1.41      albertel  183:     $result.=$head_tag_start."</head>".$body_tag_start.
                    184:       '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
                    185:        <input type="hidden" name="submitted" value="edit" />
                    186:        <input type="hidden" name="problemmode" value="Edit" />
                    187:        <input type="submit" name="problemmode" value="View" />
                    188:        <input type="submit" name="Undo" value="undo" /> <hr />
1.49      albertel  189:        <input type="submit" name="submit" value="Submit Changes" /><br />
1.41      albertel  190:       ';
1.39      albertel  191:     my $temp=&Apache::edit::insertlist($target,$token);
1.36      albertel  192:     $result.=$temp;
                    193:     return $result;
1.34      albertel  194:   }
1.37      albertel  195:   if ($target eq 'modified') {
                    196:     $result=$token->[4];
                    197:     $result.=&Apache::edit::handle_insert();
                    198:     return $result;
                    199:   }
1.19      albertel  200:   return '';
1.9       albertel  201: }
                    202: 
                    203: sub end_problem {
1.40      albertel  204:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.16      albertel  205:   my $result='';
1.24      albertel  206:   my $status=$Apache::inputtags::status['-1'];
1.40      albertel  207:   if ($target eq 'grade' || $target eq 'web' ) {
1.28      albertel  208:     if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
                    209:        $status eq 'CAN_ANSWER') {
1.19      albertel  210:       # if part is zero, no <part>s existed, so we need to the grading
                    211:       &Apache::inputtags::grade;
                    212:     } elsif ($Apache::inputtags::part eq '0') {
                    213:       # if part is zero, no <part>s existed, so we need show the current 
                    214:       # grading status
1.20      albertel  215:       $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
1.41      albertel  216:     }
1.22      albertel  217:     if ($target eq 'web') { 
                    218:       if ($status eq 'CAN_ANSWER') {
                    219: 	$result.="</form></body>\n"; 
1.28      albertel  220:       } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.41      albertel  221: 	$result.="</body>\n";
                    222:       }
1.50      albertel  223:       $result.=&Apache::lonxml::xmlend();
1.22      albertel  224:     }
1.41      albertel  225:   }
1.34      albertel  226:   if ($target eq 'meta') {
1.18      albertel  227:     if ($Apache::inputtags::part eq '0') {
1.16      albertel  228:       $result=&Apache::response::mandatory_part_meta;
                    229:     }
                    230:   }
1.34      albertel  231:   if ($target eq 'edit') {
                    232:     &Apache::lonxml::debug("in end_problem with $target, edit");
1.48      albertel  233:     $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
                    234:   }
                    235:   return $result;
                    236: }
                    237: 
                    238: sub start_library {
                    239:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    240:   my ($result,$head_tag_start,$body_tag_start)=
                    241:     &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    242:   if ($target eq 'edit') {
                    243:     $result.=$head_tag_start."</head>".$body_tag_start.
                    244:       '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
                    245:        <input type="hidden" name="submitted" value="edit" />
                    246:        <input type="hidden" name="problemmode" value="Edit" />
                    247:        <input type="submit" name="problemmode" value="View" />
                    248:        <input type="submit" name="Undo" value="undo" /> <hr />
                    249:       ';
                    250:     my $temp=&Apache::edit::insertlist($target,$token);
                    251:     $result.=$temp;
                    252:     return $result;
                    253:   }
                    254:   if ($target eq 'modified') {
                    255:     $result=$token->[4];
                    256:     $result.=&Apache::edit::handle_insert();
                    257:     return $result;
                    258:   }
                    259:   return '';
                    260: }
                    261: 
                    262: sub end_library {
                    263:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    264:   my $result='';
                    265:   if ($target eq 'edit') {
1.34      albertel  266:     $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
                    267:   }
1.16      albertel  268:   return $result;
1.1       albertel  269: }
                    270: 
                    271: sub start_block {
1.40      albertel  272:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.1       albertel  273: 
1.38      albertel  274:   if ($target eq 'web' || $target eq 'grade') {
                    275:     my $code = @$parstack[$#$parstack];
                    276:     $code =~ s/\"//g;
                    277:     $code .=';return $condition;';
                    278:     #  print "<br />$code<br />";
                    279:     my $result = &Apache::run::run($code,$safeeval);
                    280:     &Apache::lonxml::debug("block :$code: returned :$result:");
                    281:     if ( ! $result ) { 
                    282:       my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
                    283:       &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
                    284:     }
1.1       albertel  285:   }
                    286:   return "";
                    287: }
                    288: 
                    289: sub end_block {
1.38      albertel  290:   return '';
1.4       tsai      291: }
                    292: 
                    293: sub start_while {
1.40      albertel  294:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.4       tsai      295: 
                    296:   my $code = @$parstack[$#$parstack];
                    297:   $code =~ s/\"//g;
                    298:   $code .=';return $condition;';
                    299: 
1.5       tsai      300:   push( @Apache::structuretags::whileconds, $code); 
1.4       tsai      301:   my $result = &Apache::run::run($code,$safeeval);
                    302:   my $bodytext=$$parser[$#$parser]->get_text("/while");
1.5       tsai      303:   push( @Apache::structuretags::whilebody, $bodytext);
                    304:   if ( $result ) { 
1.8       albertel  305:     &Apache::lonxml::newparser($parser,\$bodytext);
1.4       tsai      306:   }
                    307:   return "";
                    308: }
                    309: 
                    310: sub end_while {
1.40      albertel  311:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.5       tsai      312:   my $code = pop @Apache::structuretags::whileconds;
                    313:   my $bodytext = pop @Apache::structuretags::whilebody;
                    314:   my $result = &Apache::run::run($code,$safeeval);
                    315:   if ( $result ) { 
1.8       albertel  316:     &Apache::lonxml::newparser($parser,\$bodytext);
1.5       tsai      317:   } 
                    318:   return "";
1.1       albertel  319: }
1.6       tsai      320: 
                    321: # <randomlist> 
                    322: #  <tag1>..</tag1>
                    323: #  <tag2>..</tag2>
                    324: #  <tag3>..</tag3>
                    325: #  ... 
                    326: # </randomlist>
                    327: sub start_randomlist {
1.40      albertel  328:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.9       albertel  329:   my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
1.6       tsai      330:   my $b_parser= HTML::TokeParser->new(\$body);
                    331:   my $b_tok;
                    332:   my @randomlist;
                    333:   my $list_item;
                    334: 
                    335:   while($b_tok = $b_parser->get_token() ) {
                    336:     if($b_tok->[0] eq 'S') { # start tag
                    337:     # get content of the tag until matching end tag
                    338:     # get all text upto the matching tag
                    339:     # and push the content into @randomlist
1.9       albertel  340:       $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
1.7       tsai      341:       $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
1.6       tsai      342:       push(@randomlist,$list_item);
1.32      albertel  343:    #  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
1.6       tsai      344:     }
                    345:     if($b_tok->[0] eq 'T') { # text
                    346:     # what to do with text in between tags?
1.32      albertel  347:       #  print "<b>TEXT $b_tok->[1]</b><br />";
1.6       tsai      348:     }
                    349:     # if($b_tok->[0] eq 'E') { # end tag, should not happen
1.32      albertel  350:       #  print "<b>END-TAG $b_tok->[1]</b><br />";
1.6       tsai      351:     # }
                    352:   }
1.7       tsai      353:   my @idx_arr = (0 .. $#randomlist);
                    354:   &Apache::structuretags::shuffle(\@idx_arr);
                    355:   my $bodytext = '';
                    356:   for(0 .. $#randomlist) {
                    357:     $bodytext .= "$randomlist[ $idx_arr[$_] ]";
                    358:   }
1.8       albertel  359: 
                    360:   &Apache::lonxml::newparser($parser,\$bodytext);
1.6       tsai      361:   return "";
1.7       tsai      362: }
                    363: 
                    364: sub shuffle {
                    365:     my $a=shift;
                    366:     my $i;
1.52      albertel  367:     &Apache::response::setrandomnumber();
1.7       tsai      368:     for($i=@$a;--$i;) {
                    369:       my $j=int rand($i+1);
                    370:       next if $i == $j;
                    371:       @$a[$i,$j] = @$a[$j,$i];
                    372:     }
1.6       tsai      373: }
                    374: 
                    375: sub end_randomlist {
1.46      albertel  376:   return '';
1.6       tsai      377: }
                    378: 
1.11      albertel  379: sub start_part {
1.40      albertel  380:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.39      albertel  381:   my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.47      albertel  382:   if ($id eq '') { $id = $Apache::lonxml::curdepth; }
1.14      albertel  383:   $Apache::inputtags::part=$id;
1.18      albertel  384:   @Apache::inputtags::responselist = ();
1.51      albertel  385:   @Apache::inputtags::previous=();
1.15      www       386:   if ($target eq 'meta') {
1.16      albertel  387:     return &Apache::response::mandatory_part_meta;
1.37      albertel  388:   } elsif ($target eq 'web' || $target eq 'grade') {
1.55      www       389:     my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
1.23      albertel  390:     push (@Apache::inputtags::status,$status);
                    391:     my $expression='$external::datestatus="'.$status.'";';
                    392:     $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                    393:     &Apache::run::run($expression,$safeeval);
                    394:     if ( $status eq 'CLOSED' ) {
1.21      albertel  395:       my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
                    396:       if ( $target eq "web" ) {
1.55      www       397: 	return "<br />Part is not open to be viewed. It $accessmsg<br />";
1.21      albertel  398:       }
                    399:     }
1.15      www       400:   }
1.19      albertel  401:   return '';
1.11      albertel  402: }
                    403: 
                    404: sub end_part {
1.40      albertel  405:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.18      albertel  406:   &Apache::lonxml::debug("in end_part $target ");
1.28      albertel  407:   my $status=$Apache::inputtags::status['-1'];
1.23      albertel  408:   pop @Apache::inputtags::status;
1.19      albertel  409:   if ( $target eq 'meta' ) { return ''; }
1.37      albertel  410:   if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
                    411:     return &Apache::inputtags::grade;
1.28      albertel  412:   }
1.37      albertel  413:   if ($target eq 'web') {
                    414:     return &Apache::inputtags::gradestatus($Apache::inputtags::part);
                    415:   }
                    416:   return '';
1.11      albertel  417: }
1.1       albertel  418: 
1.25      albertel  419: sub start_preduedate {
1.40      albertel  420:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34      albertel  421:   if ($target eq 'web' || $target eq 'grade') {
1.29      albertel  422:     if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
                    423: 	$Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
1.26      albertel  424:       &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
1.24      albertel  425:     }
                    426:   }
                    427:   return '';
                    428: }
                    429: 
1.25      albertel  430: sub end_preduedate {
1.24      albertel  431:   return '';
                    432: }
                    433: 
1.25      albertel  434: sub start_postanswerdate {
1.40      albertel  435:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34      albertel  436:   if ($target eq 'web' || $target eq 'grade') {
1.24      albertel  437:     if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.26      albertel  438:       &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
1.24      albertel  439:     }
                    440:   }
                    441:   return '';
                    442: }
                    443: 
1.25      albertel  444: sub end_postanswerdate {
1.24      albertel  445:   return '';
                    446: }
                    447: 
1.25      albertel  448: sub start_notsolved {
1.40      albertel  449:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34      albertel  450:   if ($target eq 'web' || $target eq 'grade') {
1.24      albertel  451:     my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                    452:     &Apache::lonxml::debug("not solved has :$gradestatus:");
                    453:     if ($gradestatus =~ /^correct/) {
                    454:       &Apache::lonxml::debug("skipping");
1.26      albertel  455:       &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
1.24      albertel  456:     }
                    457:   }
                    458:   return '';
                    459: }
                    460: 
1.25      albertel  461: sub end_notsolved {
1.24      albertel  462:   return '';
                    463: }
                    464: 
                    465: sub start_solved {
1.40      albertel  466:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34      albertel  467:   if ($target eq 'web' || $target eq 'grade') {
1.24      albertel  468:     my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                    469:     if ($gradestatus !~ /^correct/) {
                    470:       &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
                    471:     }
                    472:   }
                    473:   return '';
                    474: }
                    475: 
                    476: sub end_solved {
                    477:   return '';
                    478: }
1.34      albertel  479: 
                    480: sub start_startouttext {
1.40      albertel  481:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.35      albertel  482:   my @result=(''.'');
                    483:   if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                    484:   return (@result);
1.34      albertel  485: }
                    486: sub end_startouttext {
1.40      albertel  487:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34      albertel  488:   my $result='';
1.35      albertel  489:   my $text='';
                    490: 
1.34      albertel  491:   if ($target eq 'edit') {
1.35      albertel  492:     $text=&Apache::lonxml::get_all_text("endouttext",$$parser[$#$parser]);
1.43      albertel  493:     $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1.42      albertel  494: <td>Delete:".
                    495:   &Apache::edit::deletelist($target,$token)
                    496:   ."</td>
                    497: <td>".
                    498:   &Apache::edit::insertlist($target,$token).
                    499:     "</td>
                    500: </tr><tr><td colspan=\"3\">\n".
1.45      albertel  501: 	&Apache::edit::editfield($token->[1],$text,"",50,4);
1.35      albertel  502:   }
                    503:   if ($target eq 'modified') {
                    504:     $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
                    505:     $result='<startouttext />'.&Apache::edit::modifiedfield();
1.34      albertel  506:   }
                    507:   return $result;
                    508: }
                    509: sub start_endouttext {
1.40      albertel  510:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34      albertel  511:   my $result='';
1.43      albertel  512:   if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1.35      albertel  513:   if ($target eq "modified") { $result='<endouttext />'; }
1.34      albertel  514:   return $result;
                    515: }
                    516: sub end_endouttext {
1.40      albertel  517:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.35      albertel  518:   my @result=('','');
                    519:   if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                    520:   return (@result);
1.34      albertel  521: }
1.45      albertel  522: sub delete_startouttext {
                    523:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    524: #  my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
                    525:   my $text=$$parser['-1']->get_text("/endouttext");
                    526:   my $token=$$parser['-1']->get_token();
                    527:   &Apache::lonxml::debug("Deleting :$text: and :$token->[0]:$token->[1]:$token->[2]: for startouttext");
                    528:   &Apache::lonxml::end_tag($tagstack,$parstack,$token);
                    529:   # Deleting 2 parallel tag pairs, but we need the numbers later to look like 
                    530:   # they did the last time round
                    531:   &Apache::lonxml::increasedepth($token);
                    532:   &Apache::lonxml::decreasedepth($token);
                    533:   return 1;
                    534: }
1.34      albertel  535: 
1.1       albertel  536: 1;
                    537: __END__

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