loncom/homework/structuretags.pm - view

File: [LON-CAPA] / loncom / homework / structuretags.pm
Revision 1.132: download - view: text, annotated - select for diffs
Wed Nov 6 23:05:02 2002 UTC (21 years, 5 months ago) by albertel
Branches: MAIN
CVS tags: HEAD

- Fixes most of BUG#793
- added new global var that controls wheter syle files defs are used
- use new tag <LONCAPA_INTERNAL_TURN_STYLE_ON /> to turn style def use back on
- removed recurse sub completely
- get_all_text now understands the Parser stack

Bugs:
- get_all_unbalanced_text needs to use parser stack
- get_all_text uses need to pass entrie parser stack
- style defs that have a tag that ends in a different style def can't use get_all_text


Need To Test:
- pars stack pops in end tags looking for start tags in get_all_text

1: # The LearningOnline Network with CAPA 2: # definition of tags that give a structure to a document 3: # 4: # $Id: structuretags.pm,v 1.132 2002/11/06 23:05:02 albertel Exp $ 5: # 6: # Copyright Michigan State University Board of Trustees 7: # 8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 9: # 10: # LON-CAPA is free software; you can redistribute it and/or modify 11: # it under the terms of the GNU General Public License as published by 12: # the Free Software Foundation; either version 2 of the License, or 13: # (at your option) any later version. 14: # 15: # LON-CAPA is distributed in the hope that it will be useful, 16: # but WITHOUT ANY WARRANTY; without even the implied warranty of 17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18: # GNU General Public License for more details. 19: # 20: # You should have received a copy of the GNU General Public License 21: # along with LON-CAPA; if not, write to the Free Software 22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23: # 24: # /home/httpd/html/adm/gpl.txt 25: # 26: # http://www.lon-capa.org/ 27: # 28: # 2/19 Guy 29: # 6/26/2001 fixed extra web display at end of <web></web> tags 30: # 8/17,8/18,8/20 Gerd Kortemeyer 31: 32: package Apache::structuretags; 33: 34: use strict; 35: use Apache::lonnet; 36: use Apache::File(); 37: 38: BEGIN { 39: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext')); 40: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate')) 41: } 42: 43: sub start_web { 44: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 45: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]); 46: if ($target eq 'web') { 47: return $bodytext; 48: } 49: return ''; 50: } 51: 52: sub end_web { 53: return ''; 54: } 55: 56: sub start_tex { 57: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 58: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]); 59: if ($target eq 'tex') { 60: return $bodytext.' '; 61: } 62: return ''; 63: } 64: 65: sub end_tex { 66: return ''; 67: } 68: 69: sub page_start { 70: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 71: my %found; 72: foreach my $taginside ($tagstack) { 73: foreach my $taglookedfor ('html','body','form') { 74: if ($taginside =~ /^$taglookedfor$/i) { $found{$taglookedfor} = 1; } 75: } 76: } 77: 78: my $result; 79: my $head_tag_start; 80: if (!defined($found{'html'})) { 81: $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack, 82: $parser,$safeeval); 83: $head_tag_start='<head>'.&Apache::lonxml::registerurl(undef,$target); 84: } 85: my $body_tag_start; 86: if (!defined($found{'body'})) { 87: $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '. 88: 'onUnload="'.&Apache::lonxml::unloadevents().'" '; 89: my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval); 90: if ($background) { 91: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]= 92: $background; 93: $body_tag_start.='background="'.$background.'" '; 94: } else { 95: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval); 96: if ($bgcolor) { 97: $body_tag_start.='bgcolor="'.$bgcolor.'" '; 98: } else { 99: $body_tag_start.='bgcolor="#ffffff"'; 100: } 101: } 102: $body_tag_start.='>'; 103: } 104: my $form_tag_start; 105: if (!defined($found{'form'})) { 106: $form_tag_start='<form name="lonhomework" method="POST" action="'. 107: $ENV{'request.uri'}.'">'; 108: } 109: return ($result,$head_tag_start,$body_tag_start,$form_tag_start); 110: } 111: 112: sub get_resource_name { 113: my ($parstack,$safeeval)=@_; 114: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval); 115: if ($name eq '') { 116: $name=&Apache::lonnet::EXT('resource.title'); 117: if ($name eq 'con_lost') { $name = ''; } 118: } 119: $Apache::lonhomework::name=$name; 120: return $name; 121: } 122: 123: sub setup_rndseed { 124: my ($safeeval)=@_; 125: my $rndseed; 126: if ($ENV{'request.state'} eq "construct") { 127: $rndseed=$ENV{'form.rndseed'}; 128: if (!$rndseed) { 129: $rndseed=time; 130: $ENV{'form.rndseed'}=$rndseed; 131: } 132: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval); 133: } 134: return $rndseed; 135: } 136: 137: sub problem_edit_header { 138: return '<input type="hidden" name="submitted" value="edit" /> 139: <input type="hidden" name="problemmode" value="Edit" /> 140: <input type="submit" name="problemmode" value="Discard Edits and View" /> 141: <input type="submit" name="problemmode" value="EditXML" /> 142: <input type="submit" name="Undo" value="undo" /> <hr /> 143: <input type="submit" name="submit" value="Submit Changes" /> 144: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p> 145: '; 146: } 147: 148: sub problem_edit_footer { 149: return '<br /><input type="submit" name="submit" value="Submit Changes and Edit" /> 150: <input type="submit" name="submit" value="Submit Changes and View" />'; 151: } 152: 153: sub problem_web_to_edit_header { 154: my ($rndseed)=@_; 155: my $result.='<input type="hidden" name="problemmode" value="View" /> 156: <input type="submit" name="problemmode" value="Edit" /> 157: <input type="submit" name="problemmode" value="EditXML" /> 158: Random Seed:<input type="text" name="rndseed" width="10" value="'. 159: $rndseed.'" /> 160: <input type="submit" name="changerandseed" value="Change" /> 161: <input type="submit" name="resetdata" value="Reset Submissions" /> 162: <input type="checkbox" name="showallfoils" '; 163: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; } 164: $result.= ' /> Show All Foils 165: <hr />'; 166: my $numtoanalyze=$ENV{'form.numtoanalyze'}; 167: if (!$numtoanalyze) { $numtoanalyze=100; } 168: #DISABLED for now. 169: #$result.= '<input type="submit" name="problemmode" value="Answer Distribution" /> 170: # <input type="text" name="numtoanalyze" value="'. 171: # $numtoanalyze.'" size="5" /> <hr />'; 172: return $result; 173: } 174: 175: sub initialize_storage { 176: %Apache::lonhomework::results=(); 177: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); 178: if ($ENV{'request.state'} eq 'construct') { 179: %Apache::lonhomework::history= 180: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name); 181: my ($temp)=keys %Apache::lonhomework::history ; 182: &Apache::lonxml::debug("Return message of $temp"); 183: } else { 184: %Apache::lonhomework::history= 185: &Apache::lonnet::restore($symb,$courseid,$domain,$name); 186: } 187: #ignore error conditions 188: my ($temp)=keys %Apache::lonhomework::history ; 189: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } 190: } 191: 192: # -------------------------------------------------------------finalize_storage 193: # Stores away the result has to a student's environment 194: # checks form.grade_ for specific values, other wises stores 195: # to the running users environment 196: sub finalize_storage { 197: my $result; 198: my ($temp) = keys %Apache::lonhomework::results; 199: if ( $temp ne '' ) { 200: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); 201: if ($ENV{'request.state'} eq 'construct') { 202: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results, 203: $ENV{'request.uri'},'',$domain,$name); 204: &Apache::lonxml::debug('Construct Store return message:'.$result); 205: } else { 206: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results, 207: $symb,$courseid,$domain,$name); 208: &Apache::lonxml::debug('Store return message:'.$result); 209: } 210: } 211: return $result; 212: } 213: 214: sub checkout_msg { 215: return (<<ENDCHECKOUT); 216: <h2>The resource needs to be checked out</h2> 217: As a resource gets checked out, a unique timestamped ID is given to it, and a 218: permanent record is left in the system.<p /> 219: <font color=red> 220: Checking out resources is subject to course policies, and may exclude future 221: credit even if done erroneously.<p /> 222: </font> 223: <form name="checkout" method="POST" action="$ENV{'request.uri'}"> 224: <input type="hidden" name="doescheckout" value="yes" /> 225: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" /> 226: </form> 227: ENDCHECKOUT 228: } 229: 230: sub start_problem { 231: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 232: 233: # meta is called from lonpublisher, which doesn't uses the normal 234: # lonhomework method of parsing the file which means that inputtags 235: # won't get reset 236: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) { 237: &Apache::lonxml::error('Only one problem allowed in a .problem file'); 238: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[-1]); 239: return ''; 240: } 241: #intialize globals 242: $Apache::inputtags::part='0'; 243: @Apache::inputtags::responselist = (); 244: @Apache::inputtags::previous=(); 245: if ($target ne 'analyze') { 246: &initialize_storage(); 247: if ($target eq 'web') { 248: &Apache::lonhomework::showhash(%Apache::lonhomework::history); 249: } 250: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type'); 251: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:"); 252: } 253: if ($Apache::lonhomework::type eq '') { 254: my $uri=$ENV{'request.uri'}; 255: if ($uri=~/\.(\w+)$/) { 256: $Apache::lonhomework::type=$1; 257: &Apache::lonxml::debug("Using type of $1"); 258: } else { 259: $Apache::lonhomework::type='problem'; 260: &Apache::lonxml::debug("Using default type, problem, :$uri:"); 261: } 262: } 263: 264: #added vars to the scripting enviroment 265: my $expression='$external::part='.$Apache::inputtags::part.';'; 266: &Apache::run::run($expression,$safeeval); 267: my $status; 268: my $accessmsg; 269: 270: #should get back a <html> or the neccesary stuff to start XML/MathML 271: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)= 272: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval); 273: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) { $result = '';} 274: 275: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') { 276: #handle exam checkout 277: if ($Apache::lonhomework::type eq 'exam') { 278: my $token=$Apache::lonhomework::history{"resource.0.outtoken"}; 279: if (($ENV{'form.doescheckout'}) && (!$token)) { 280: $token=&Apache::lonxml::maketoken(); 281: $Apache::lonhomework::history{"resource.0.outtoken"}=$token; 282: } 283: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token); 284: } 285: 286: #handle rand seed in construction space 287: my $rndseed=&setup_rndseed($safeeval); 288: ($status,$accessmsg) = &Apache::lonhomework::check_access('0'); 289: push (@Apache::inputtags::status,$status); 290: my $expression='$external::datestatus="'.$status.'";'; 291: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";'; 292: &Apache::run::run($expression,$safeeval); 293: &Apache::lonxml::debug("Got $status"); 294: if (( $status eq 'CLOSED' ) || 295: ( $status eq 'UNCHECKEDOUT') || 296: ( $status eq 'BANNED')) { 297: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser); 298: if ( $target eq "web" ) { 299: $result.= $head_tag_start.'</head>'; 300: my $msg=$body_tag_start. 301: '<h1>Not open to be viewed</h1>'; 302: if ($status eq 'CLOSED') { 303: $msg.='The problem '.$accessmsg; 304: } elsif ($status eq 'UNCHECKEDOUT') { 305: $msg.=&checkout_msg; 306: } 307: $result.=$msg.'<br />'; 308: } elsif ($target eq 'tex') { 309: $result.="\\begin{document}\\noindent \\vskip 1 mm \\begin{minipage}{\\textwidth}\\vskip 0 mm Problem is not open to be viewed. It $accessmsg \\vskip 0 mm "; 310: } 311: } elsif ($target eq 'web') { 312: my $name= &get_resource_name($parstack,$safeeval); 313: if ($status eq 'CAN_ANSWER') { 314: # create a page header and exit 315: $result.="$head_tag_start<title>$name</title></head> 316: $body_tag_start \n $form_tag_start". 317: '<input type="hidden" name="submitted" value="yes" />'; 318: if ($ENV{'request.state'} eq "construct") { 319: $result.= &problem_web_to_edit_header($rndseed); 320: } 321: # if we are viewing someone else preserve that info 322: if (defined $ENV{'form.grade_symb'}) { 323: foreach my $field ('symb','courseid','domain','username') { 324: $result .= '<input type="hidden" name="grade_'.$field. 325: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n"; 326: } 327: } 328: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' 329: || $status eq 'CLOSED') { 330: $result.=$head_tag_start. 331: "<title>$name</title></head>\n$body_tag_start\n"; 332: } 333: } elsif ($target eq 'tex') { 334: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval); 335: if ($name eq '') { 336: $name=&Apache::lonnet::EXT('resource.title'); 337: if ($name eq 'con_lost') { $name = ''; } 338: } 339: $Apache::lonhomework::name=$name; 340: my $id = $Apache::inputtags::part; 341: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 342: $duedate = POSIX::strftime("%c",localtime($duedate)); 343: my $temp_file; 344: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due"; 345: if (-e $filename) { 346: $temp_file = Apache::File->new($filename); 347: } else { 348: $temp_file = Apache::File->new('>>'.$filename); 349: } 350: my @due_file_content = <$temp_file>; 351: my $due_file_content = $due_file_content[$#due_file_content]; 352: chomp $due_file_content; 353: if ($due_file_content ne $duedate) { 354: $temp_file = Apache::File->new('>'.$filename); 355: print $temp_file "$duedate\n"; 356: if (not $ENV{'request.symb'} =~ m/\.page_/) { 357: if(not $duedate=~m/1969/) { 358: $result .= '\begin{document} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent \begin{minipage}{\textwidth}'; 359: } else { 360: $result .= '\begin{document} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}'; 361: } 362: } else { 363: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'; 364: } 365: } else { 366: if (not $ENV{'request.symb'} =~ m/\.page_/) { 367: $result .= '\begin{document} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}'; 368: } else { 369: $result .= '\vskip 1mm \\\\\\\\'; 370: } 371: } 372: } 373: } elsif ($target eq 'edit') { 374: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start. 375: &problem_edit_header(); 376: my $temp=&Apache::edit::insertlist($target,$token); 377: $result.=$temp; 378: } elsif ($target eq 'modified') { 379: $result=$token->[4]; 380: $result.=&Apache::edit::handle_insert(); 381: } else { 382: # page_start returned a starting result, delete it if we don't need it 383: $result = ''; 384: } 385: return $result; 386: } 387: 388: sub end_problem { 389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 390: my $result=''; 391: my $status=$Apache::inputtags::status['-1']; 392: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') { 393: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') { 394: # if part is zero, no <part>s existed, so we need to the grading 395: &Apache::inputtags::grade; 396: } elsif ( ($target eq 'web' || $target eq 'tex') && $Apache::inputtags::part eq '0' && 397: $status ne 'UNCHECKEDOUT') { 398: # if part is zero, no <part>s existed, so we need show the current 399: # grading status 400: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target); 401: if ($Apache::lonhomework::type ne 'exam') {$result.= $gradestatus;} 402: } 403: if ( 404: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) || 405: ($target eq 'answer') || ($target eq 'tex') 406: ) { 407: if ($status eq 'CAN_ANSWER') { 408: if ($target ne 'tex') { 409: $result.="</form></body>\n"; 410: } 411: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || 412: $status eq 'UNCHECKEDOUT' ) { 413: if ($target ne 'tex') { 414: $result.="</body>\n"; 415: } 416: } 417: if ($target ne 'tex') { 418: $result.=&Apache::lonxml::xmlend(); 419: } else { 420: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}'; 421: if (not $ENV{'request.symb'} =~ m/\.page_/) { 422: $result .= '\end{minipage}\end{document} '; 423: } else { 424: $result .= ''; 425: } 426: } 427: } 428: if ($target eq 'grade') { 429: &Apache::lonhomework::showhash(%Apache::lonhomework::results); 430: &finalize_storage(); 431: } 432: } elsif ($target eq 'meta') { 433: if ($Apache::inputtags::part eq '0') { 434: $result=&Apache::response::mandatory_part_meta; 435: } 436: } elsif ($target eq 'edit') { 437: &Apache::lonxml::debug("in end_problem with $target, edit"); 438: $result = &problem_edit_footer(); 439: } 440: return $result; 441: } 442: 443: 444: sub start_library { 445: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 446: my ($result,$head_tag_start,$body_tag_start,$form_tag_start); 447: 448: if ($target eq 'edit') { 449: ($result,$head_tag_start,$body_tag_start,$form_tag_start)= 450: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval); 451: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start. 452: &problem_edit_header(); 453: my $temp=&Apache::edit::insertlist($target,$token); 454: $result.=$temp; 455: } elsif ($target eq 'modified') { 456: $result=$token->[4]; 457: $result.=&Apache::edit::handle_insert(); 458: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' && 459: $ENV{'request.state'} eq "construct" ) { 460: ($result,$head_tag_start,$body_tag_start,$form_tag_start)= 461: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval); 462: my $name=&get_resource_name($parstack,$safeeval); 463: my $rndseed=&setup_rndseed($safeeval); 464: $result.="$head_tag_start<title>$name</title></head> 465: $body_tag_start \n $form_tag_start". 466: '<input type="hidden" name="submitted" value="yes" />'; 467: $result.=&problem_web_to_edit_header($rndseed); 468: } 469: return $result; 470: } 471: 472: sub end_library { 473: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 474: my $result=''; 475: if ($target eq 'edit') { 476: $result=&problem_edit_footer(); 477: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' && 478: $ENV{'request.state'} eq "construct") { 479: $result.='</form></body>'.&Apache::lonxml::xmlend(); 480: } 481: return $result; 482: } 483: 484: sub start_block { 485: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 486: 487: my $result; 488: 489: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || 490: $target eq 'tex' || $target eq 'analyze') { 491: my $code = @$parstack[$#$parstack]; 492: if ($code) { 493: $code =~ s/\"//g; 494: $code .=';return $condition;'; 495: $result = &Apache::run::run($code,$safeeval); 496: &Apache::lonxml::debug("block :$code: returned :$result:"); 497: } else { 498: $result='1'; 499: } 500: if ( ! $result ) { 501: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[-1]); 502: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]"); 503: } 504: $result=''; 505: } elsif ($target eq 'edit') { 506: $result .=&Apache::edit::tag_start($target,$token); 507: $result .=&Apache::edit::text_arg('Test Condition:','condition', 508: $token,40); 509: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row(); 510: } elsif ($target eq 'modified') { 511: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 512: $safeeval,'condition'); 513: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 514: } 515: return $result; 516: } 517: 518: sub end_block { 519: return ''; 520: } 521: 522: sub start_while { 523: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 524: 525: my $code = @$parstack[$#$parstack]; 526: $code =~ s/\"//g; 527: $code .=';return $condition;'; 528: 529: push( @Apache::structuretags::whileconds, $code); 530: my $result = &Apache::run::run($code,$safeeval); 531: my $bodytext=$$parser[$#$parser]->get_text("/while"); 532: push( @Apache::structuretags::whilebody, $bodytext); 533: if ( $result ) { 534: &Apache::lonxml::newparser($parser,\$bodytext); 535: } 536: return ""; 537: } 538: 539: sub end_while { 540: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 541: my $code = pop @Apache::structuretags::whileconds; 542: my $bodytext = pop @Apache::structuretags::whilebody; 543: my $result = &Apache::run::run($code,$safeeval); 544: if ( $result ) { 545: &Apache::lonxml::newparser($parser,\$bodytext); 546: } 547: return ""; 548: } 549: 550: # <randomlist show="1"> 551: # <tag1>..</tag1> 552: # <tag2>..</tag2> 553: # <tag3>..</tag3> 554: # ... 555: # </randomlist> 556: sub start_randomlist { 557: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 558: my $result; 559: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' || 560: $target eq 'tex' || $target eq 'analyze') { 561: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]); 562: my $b_parser= HTML::TokeParser->new(\$body); 563: my $b_tok; 564: my @randomlist; 565: my $list_item; 566: while($b_tok = $b_parser->get_token() ) { 567: if($b_tok->[0] eq 'S') { # start tag 568: # get content of the tag until matching end tag 569: # get all text upto the matching tag 570: # and push the content into @randomlist 571: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser); 572: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>"; 573: push(@randomlist,$list_item); 574: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>"; 575: } 576: if($b_tok->[0] eq 'T') { # text 577: # what to do with text in between tags? 578: # print "<b>TEXT $b_tok->[1]</b><br />"; 579: } 580: # if($b_tok->[0] eq 'E') { # end tag, should not happen 581: # print "<b>END-TAG $b_tok->[1]</b><br />"; 582: # } 583: } 584: my @idx_arr = (0 .. $#randomlist); 585: &Apache::structuretags::shuffle(\@idx_arr); 586: my $bodytext = ''; 587: my $show=$#randomlist; 588: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval); 589: $showarg--; 590: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; } 591: for(0 .. $show) { 592: $bodytext .= "$randomlist[ $idx_arr[$_] ]"; 593: } 594: &Apache::lonxml::newparser($parser,\$bodytext); 595: } elsif ($target eq 'edit' ) { 596: $result .= &Apache::edit::tag_start($target,$token); 597: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5); 598: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row(); 599: } elsif ($target eq 'modified' ) { 600: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval, 601: 'show'); 602: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 603: } 604: return $result; 605: } 606: 607: sub shuffle { 608: my $a=shift; 609: my $i; 610: if (defined(@$a)) { 611: &Apache::response::setrandomnumber(); 612: for($i=@$a;--$i;) { 613: my $j=int(&Math::Random::random_uniform() * ($i+1)); 614: next if $i == $j; 615: @$a[$i,$j] = @$a[$j,$i]; 616: } 617: } 618: } 619: 620: sub end_randomlist { 621: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 622: my $result; 623: if ($target eq 'edit' ) { 624: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block'); 625: } 626: return $result; 627: } 628: 629: sub start_part { 630: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 631: my $result=''; 632: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval); 633: if ($id eq '') { $id = $Apache::lonxml::curdepth; } 634: $Apache::inputtags::part=$id; 635: @Apache::inputtags::responselist = (); 636: @Apache::inputtags::previous=(); 637: if ($target eq 'meta') { 638: return &Apache::response::mandatory_part_meta; 639: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') { 640: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id); 641: push (@Apache::inputtags::status,$status); 642: my $expression='$external::datestatus="'.$status.'";'; 643: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";'; 644: &Apache::run::run($expression,$safeeval); 645: if ( $status eq 'CLOSED' ) { 646: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]); 647: if ( $target eq "web" ) { 648: $result="<br />Part is not open to be viewed. It $accessmsg<br />"; 649: } elsif ( $target eq 'tex' ) { 650: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}"; 651: } 652: } else { 653: if ($target eq 'tex') { 654: if ($$tagstack[-2] ne 'problem') { 655: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent'; 656: } 657: } 658: } 659: } 660: return $result; 661: } 662: 663: sub end_part { 664: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 665: &Apache::lonxml::debug("in end_part $target "); 666: my $status=$Apache::inputtags::status['-1']; 667: pop @Apache::inputtags::status; 668: if ( $target eq 'meta' ) { return ''; } 669: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') { 670: return &Apache::inputtags::grade; 671: } 672: if ($target eq 'web' || $target eq 'tex' ) { 673: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,$target); 674: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';} 675: return $gradestatus; 676: } 677: return ''; 678: } 679: 680: sub start_preduedate { 681: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 682: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') { 683: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' && 684: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) { 685: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]); 686: } 687: } 688: return ''; 689: } 690: 691: sub end_preduedate { 692: return ''; 693: } 694: 695: sub start_postanswerdate { 696: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 697: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') { 698: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') { 699: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]); 700: } 701: } elsif ($target eq 'tex') { 702: return '\vskip 0 mm \noindent'; 703: } 704: return ''; 705: } 706: 707: sub end_postanswerdate { 708: return ''; 709: } 710: 711: sub start_notsolved { 712: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 713: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') { 714: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"}; 715: &Apache::lonxml::debug("not solved has :$gradestatus:"); 716: if ($gradestatus =~ /^correct/) { 717: &Apache::lonxml::debug("skipping"); 718: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]); 719: } 720: } 721: return ''; 722: } 723: 724: sub end_notsolved { 725: return ''; 726: } 727: 728: sub start_solved { 729: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 730: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') { 731: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"}; 732: if ($gradestatus !~ /^correct/) { 733: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]); 734: } 735: } 736: return ''; 737: } 738: 739: sub end_solved { 740: return ''; 741: } 742: 743: sub start_startouttext { 744: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 745: my @result=(''.''); 746: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); } 747: return (@result); 748: } 749: sub end_startouttext { 750: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 751: my $result=''; 752: my $text=''; 753: 754: if ($target eq 'edit') { 755: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]); 756: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td> 757: <td>Delete:". 758: &Apache::edit::deletelist($target,$token) 759: ."</td> 760: <td>". 761: &Apache::edit::insertlist($target,$token). 762: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n". 763: &Apache::edit::editfield($token->[1],$text,"",80,4); 764: } 765: if ($target eq 'modified') { 766: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']); 767: $result='<startouttext />'.&Apache::edit::modifiedfield(); 768: } 769: if ($target eq 'tex') { 770: $result .= '\noindent '; 771: } 772: return $result; 773: } 774: sub start_endouttext { 775: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 776: my $result=''; 777: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; } 778: if ($target eq "modified") { 779: $result='<endouttext />'. 780: &Apache::edit::handle_insertafter('startouttext'); } 781: return $result; 782: } 783: sub end_endouttext { 784: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 785: my @result=('',''); 786: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); } 787: return (@result); 788: } 789: sub delete_startouttext { 790: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 791: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']); 792: my $text=$$parser['-1']->get_text("/endouttext"); 793: my $ntoken=$$parser['-1']->get_token(); 794: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext"); 795: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken); 796: # Deleting 2 parallel tag pairs, but we need the numbers later to look like 797: # they did the last time round 798: &Apache::lonxml::increasedepth($ntoken); 799: &Apache::lonxml::decreasedepth($ntoken); 800: return 1; 801: } 802: 803: 1; 804: __END__