loncom/xml/lonxml.pm - view

File: [LON-CAPA] / loncom / xml / lonxml.pm
Revision 1.224: download - view: text, annotated - select for diffs
Mon Jan 13 22:18:34 2003 UTC (21 years, 4 months ago) by albertel
Branches: MAIN
CVS tags: HEAD

- if you can't find the end tag when doing get_all_text throw an
  error and send nothing back, (No need to send random garbage into the
  perl interpreter)
- have <script> and <display> send the full parser stack

1: # The LearningOnline Network with CAPA 2: # XML Parser Module 3: # 4: # $Id: lonxml.pm,v 1.224 2003/01/13 22:18:34 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: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 30: # binary executable programs or libraries distributed by the 31: # Michigan State University (the "Licensee"), but any binaries so 32: # distributed are hereby licensed only for use in the context 33: # of a program or computational system for which the Licensee is the 34: # primary author or distributor, and which performs substantial 35: # additional tasks beyond the translation of (La)TeX into HTML. 36: # The C source of the Code may not be distributed by the Licensee 37: # to any other parties under any circumstances. 38: # 39: # last modified 06/26/00 by Alexander Sakharuk 40: # 11/6 Gerd Kortemeyer 41: # 6/1/1 Gerd Kortemeyer 42: # 2/21,3/13 Guy 43: # 3/29,5/4 Gerd Kortemeyer 44: # 5/10 Scott Harrison 45: # 5/26 Gerd Kortemeyer 46: # 5/27 H. K. Ng 47: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer 48: # 6/12,6/13 H. K. Ng 49: # 6/16 Gerd Kortemeyer 50: # 7/27 H. K. Ng 51: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer 52: # Guy Albertelli 53: # 9/26 Gerd Kortemeyer 54: # Dec Guy Albertelli 55: # YEAR=2002 56: # 1/1 Gerd Kortemeyer 57: # 1/2 Matthew Hall 58: # 1/3 Gerd Kortemeyer 59: # 60: 61: package Apache::lonxml; 62: use vars 63: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount); 64: use strict; 65: use HTML::LCParser(); 66: use HTML::TreeBuilder(); 67: use HTML::Entities(); 68: use Safe(); 69: use Safe::Hole(); 70: use Math::Cephes(); 71: use Math::Random(); 72: use Opcode(); 73: 74: sub register { 75: my ($space,@taglist) = @_; 76: foreach my $temptag (@taglist) { 77: push(@{ $Apache::lonxml::alltags{$temptag} },$space); 78: } 79: } 80: 81: sub deregister { 82: my ($space,@taglist) = @_; 83: foreach my $temptag (@taglist) { 84: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1]; 85: if ($tempspace eq $space) { 86: pop(@{ $Apache::lonxml::alltags{$temptag} }); 87: } 88: } 89: #&printalltags(); 90: } 91: 92: use Apache::Constants qw(:common); 93: use Apache::lontexconvert(); 94: use Apache::style(); 95: use Apache::run(); 96: use Apache::londefdef(); 97: use Apache::scripttag(); 98: use Apache::edit(); 99: use Apache::lonnet(); 100: use Apache::File(); 101: use Apache::loncommon(); 102: use Apache::lonfeedback(); 103: use Apache::lonmsg(); 104: use Apache::loncacc(); 105: 106: #================================================== Main subroutine: xmlparse 107: #debugging control, to turn on debugging modify the correct handler 108: $Apache::lonxml::debug=0; 109: 110: # keeps count of the number of warnings and errors generated in a parse 111: $warningcount=0; 112: $errorcount=0; 113: 114: #path to the directory containing the file currently being processed 115: @pwd=(); 116: 117: #these two are used for capturing a subset of the output for later processing, 118: #don't touch them directly use &startredirection and &endredirection 119: @outputstack = (); 120: $redirection = 0; 121: 122: #controls wheter the <import> tag actually does 123: $import = 1; 124: @extlinks=(); 125: 126: # meta mode is a bit weird only some output is to be turned off 127: #<output> tag turns metamode off (defined in londefdef.pm) 128: $metamode = 0; 129: 130: # turns on and of run::evaluate actually derefencing var refs 131: $evaluate = 1; 132: 133: # data structure for eidt mode, determines what tags can go into what other tags 134: %insertlist=(); 135: 136: # stores the list of active tag namespaces 137: @namespace=(); 138: 139: # if 0 all high ASCII characters will be encoded into HTML Entities 140: $prevent_entity_encode=0; 141: 142: # has the dynamic menu been updated to know about this resource 143: $Apache::lonxml::registered=0; 144: 145: # a pointer the the Apache request object 146: $Apache::lonxml::request=''; 147: 148: # a problem number counter, and check on ether it is used 149: $Apache::lonxml::counter=1; 150: $Apache::lonxml::counter_changed=0; 151: 152: #internal check on whether to look at style defs 153: $Apache::lonxml::usestyle=1; 154: 155: sub xmlbegin { 156: my $output=''; 157: if ($ENV{'browser.mathml'}) { 158: $output='<?xml version="1.0"?>' 159: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>' 160: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" ' 161: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>' 162: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 163: .'xmlns="http://www.w3.org/TR/REC-html40">'; 164: } else { 165: $output='<html>'; 166: } 167: return $output; 168: } 169: 170: sub xmlend { 171: my ($discussiononly,$symb)=@_; 172: my $discussion=''; 173: if ($ENV{'request.course.id'}) { 174: my $crs='/'.$ENV{'request.course.id'}; 175: if ($ENV{'request.course.sec'}) { 176: $crs.='_'.$ENV{'request.course.sec'}; 177: } 178: $crs=~s/\_/\//g; 179: my $seeid=&Apache::lonnet::allowed('rin',$crs); 180: unless ($symb) { 181: $symb=&Apache::lonnet::symbread(); 182: } 183: if ($symb) { 184: my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'}, 185: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}, 186: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}); 187: if ($contrib{'version'}) { 188: unless ($discussiononly) { 189: $discussion.= 190: '<address><hr />'; 191: } 192: my $idx; 193: for ($idx=1;$idx<=$contrib{'version'};$idx++) { 194: my $hidden=($contrib{'hidden'}=~/\.$idx\./); 195: my $deleted=($contrib{'deleted'}=~/\.$idx\./); 196: unless ((($hidden) && (!$seeid)) || ($deleted)) { 197: my $message=$contrib{$idx.':message'}; 198: $message=~s/\n/\<br \/\>/g; 199: $message=&Apache::lontexconvert::msgtexconverted($message); 200: if ($message) { 201: if ($hidden) { 202: $message='<font color="#888888">'.$message.'</font>'; 203: } 204: my $screenname=&Apache::loncommon::screenname( 205: $contrib{$idx.':sendername'}, 206: $contrib{$idx.':senderdomain'}); 207: my $plainname=&Apache::loncommon::nickname( 208: $contrib{$idx.':sendername'}, 209: $contrib{$idx.':senderdomain'}); 210: 211: my $sender='Anonymous'; 212: if ((!$contrib{$idx.':anonymous'}) || ($seeid)) { 213: $sender=&Apache::loncommon::aboutmewrapper( 214: $plainname, 215: $contrib{$idx.':sendername'}, 216: $contrib{$idx.':senderdomain'}).' ('. 217: $contrib{$idx.':sendername'}.' at '. 218: $contrib{$idx.':senderdomain'}.')'; 219: if ($contrib{$idx.':anonymous'}) { 220: $sender.=' [anonymous] '. 221: $screenname; 222: } 223: if ($seeid) { 224: if ($hidden) { 225: $sender.=' <a href="/adm/feedback?unhide='. 226: $symb.':::'.$idx.'">Make Visible</a>'; 227: } else { 228: $sender.=' <a href="/adm/feedback?hide='. 229: $symb.':::'.$idx.'">Hide</a>'; 230: } 231: $sender.=' <a href="/adm/feedback?deldisc='. 232: $symb.':::'.$idx.'">Delete</a>'; 233: } 234: } else { 235: if ($screenname) { 236: $sender='<i>'.$screenname.'</i>'; 237: } 238: } 239: $discussion.='<p><b>'.$sender.'</b> ('. 240: localtime($contrib{$idx.':timestamp'}). 241: '):<blockquote>'.$message. 242: '</blockquote></p>'; 243: } 244: } 245: } 246: unless ($discussiononly) { 247: $discussion.='</address>'; 248: } 249: } 250: if ($discussiononly) { 251: $discussion.=(<<ENDDISCUSS); 252: <form action="/adm/feedback" method="post" name="mailform"> 253: <input type="submit" name="discuss" value="Post Discussion" /> 254: <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" /> 255: <input type="hidden" name="symb" value="$symb" /> 256: <input type="hidden" name="sendit" value="true" /> 257: <br /> 258: <font size="1">Note: in anonymous discussion, your name is visible only to 259: course faculty</font><br /> 260: <textarea name=comment cols=60 rows=10 wrap=hard></textarea> 261: </form> 262: ENDDISCUSS 263: $discussion.=&Apache::lonfeedback::generate_preview_button(); 264: } 265: } 266: } 267: return $discussion.($discussiononly?'':'</html>'); 268: } 269: 270: sub tokeninputfield { 271: my $defhost=$Apache::lonnet::perlvar{'lonHostID'}; 272: $defhost=~tr/a-z/A-Z/; 273: return (<<ENDINPUTFIELD) 274: <script> 275: function updatetoken() { 276: var comp=new Array; 277: var barcode=unescape(document.tokeninput.barcode.value); 278: comp=barcode.split('*'); 279: if (typeof(comp[0])!="undefined") { 280: document.tokeninput.codeone.value=comp[0]; 281: } 282: if (typeof(comp[1])!="undefined") { 283: document.tokeninput.codetwo.value=comp[1]; 284: } 285: if (typeof(comp[2])!="undefined") { 286: comp[2]=comp[2].toUpperCase(); 287: document.tokeninput.codethree.value=comp[2]; 288: } 289: document.tokeninput.barcode.value=''; 290: } 291: </script> 292: <form method="post" name="tokeninput"> 293: <table border="2" bgcolor="#FFFFBB"> 294: <tr><th>DocID Checkin</th></tr> 295: <tr><td> 296: <table> 297: <tr> 298: <td>Scan in Barcode</td> 299: <td><input type="text" size="22" name="barcode" 300: onChange="updatetoken()"/></td> 301: </tr> 302: <tr><td><i>or</i> Type in DocID</td> 303: <td> 304: <input type="text" size="5" name="codeone" /> 305: <b><font size="+2">*</font></b> 306: <input type="text" size="5" name="codetwo" /> 307: <b><font size="+2">*</font></b> 308: <input type="text" size="10" name="codethree" value="$defhost" 309: onChange="this.value=this.value.toUpperCase()" /> 310: </td></tr> 311: </table> 312: </td></tr> 313: <tr><td><input type="submit" value="Check in DocID" /></td></tr> 314: </table> 315: </form> 316: ENDINPUTFIELD 317: } 318: 319: sub maketoken { 320: my ($symb,$tuname,$tudom,$tcrsid)=@_; 321: unless ($symb) { 322: $symb=&Apache::lonnet::symbread(); 323: } 324: unless ($tuname) { 325: $tuname=$ENV{'user.name'}; 326: $tudom=$ENV{'user.domain'}; 327: $tcrsid=$ENV{'request.course.id'}; 328: } 329: 330: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid); 331: } 332: 333: sub printtokenheader { 334: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_; 335: unless ($token) { return ''; } 336: 337: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); 338: unless ($tsymb) { 339: $tsymb=$symb; 340: } 341: unless ($tuname) { 342: $tuname=$name; 343: $tudom=$domain; 344: $tcrsid=$courseid; 345: } 346: 347: my %reply=&Apache::lonnet::get('environment', 348: ['firstname','middlename','lastname','generation'], 349: $tudom,$tuname); 350: my $plainname=$reply{'firstname'}.' '. 351: $reply{'middlename'}.' '. 352: $reply{'lastname'}.' '. 353: $reply{'generation'}; 354: 355: if ($target eq 'web') { 356: my %idhash=&Apache::lonnet::idrget($tudom,($tuname)); 357: return 358: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'. 359: 'Checked out for '.$plainname. 360: '<br />User: '.$tuname.' at '.$tudom. 361: '<br />ID: '.$idhash{$tuname}. 362: '<br />CourseID: '.$tcrsid. 363: '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}. 364: '<br />DocID: '.$token. 365: '<br />Time: '.localtime().'<hr />'; 366: } else { 367: return $token; 368: } 369: } 370: 371: sub fontsettings() { 372: my $headerstring=''; 373: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 374: $headerstring.= 375: '<meta Content-Type="text/html; charset=x-mac-roman">'; 376: } 377: return $headerstring; 378: } 379: 380: 381: ## 382: ## switchmenu - modeled on lonmenu::switchmenu, but better. 383: ## Helper function for registerurl 384: ## 385: sub switchmenu { 386: my ($row,$col,$imgsrc,$texttop,$textbot,$action,$description)=@_; 387: return(<<ENDSMENU); 388: menu.switchbutton($row,$col,'$imgsrc','$texttop','$textbot','$action','$description'); 389: ENDSMENU 390: } 391: 392: sub registerurl { 393: my $forcereg=shift; 394: my $target = shift; 395: my $result = ''; 396: 397: if ($target eq 'edit') { 398: $result .="<script>\n". 399: "if (typeof menu != 'undefined') {menu.currentURL=null;}\n". 400: &Apache::loncommon::browser_and_searcher_javascript(). 401: "\n</script>\n"; 402: } 403: if ((($ENV{'request.publicaccess'}) || 404: (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) && 405: (!$forcereg)) { 406: return $result. 407: '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>'; 408: } 409: if ($Apache::lonxml::registered && !$forcereg) { return ''; } 410: $Apache::lonxml::registered=1; 411: my $nothing=''; 412: if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; } 413: my $newmail=''; 414: if (&Apache::lonmsg::newmail()) { 415: $newmail='menu.setstatus("you have","messages");'; 416: } 417: my $timesync='menu.syncclock(1000*'.time.');'; 418: if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) { 419: my $hwkadd=''; 420: if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) { 421: if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) { 422: $hwkadd.=(<<ENDSUBM); 423: menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")', 424: 'View user submissions for this assessment resource'); 425: ENDSUBM 426: } 427: if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) { 428: $hwkadd.=(<<ENDGRDS); 429: menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")', 430: 'Modify user grades for this assessment resource'); 431: ENDGRDS 432: } 433: if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) { 434: $hwkadd.=(<<ENDPARM); 435: menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")', 436: 'Modify deadlines, etc, for this assessment resource'); 437: ENDPARM 438: } 439: } 440: ### 441: ### Determine whether or not to display the 'cstr' button for this 442: ### resource 443: ### 444: my $editbutton = ''; 445: if ($ENV{'user.author'}) { 446: if ($ENV{'request.role'}=~/^(ca|au)/) { 447: # Set defaults for authors 448: my ($top,$bottom) = ('con-','struct'); 449: my $action = "go('/priv/".$ENV{'user.name'}."');"; 450: my $cadom = $ENV{'request.role.domain'}; 451: my $caname = $ENV{'user.name'}; 452: my $desc = "Enter my resource construction space"; 453: # Set defaults for co-authors 454: if ($ENV{'request.role'} =~ /^ca/) { 455: ($cadom,$caname)=($ENV{'request.role'}=~/(\w+)\/(\w+)$/); 456: ($top,$bottom) = ('co con-','struct'); 457: $action = 'go("/priv/'.$caname.'");'; 458: $desc = "Enter construction space as co-author"; 459: } 460: # Check that we are on the correct machine 461: my $home = &Apache::lonnet::homeserver($caname,$cadom); 462: if ($home eq $Apache::lonnet::perlvar{'lonHostID'}) { 463: $editbutton=&switchmenu 464: (6,1,$top,,$bottom,$action,$desc); 465: } 466: } 467: ## 468: ## Determine if user can edit url. 469: ## 470: my $cfile=''; 471: my $cfuname=''; 472: my $cfudom=''; 473: if ($ENV{'request.filename'}) { 474: my $file=&Apache::lonnet::declutter($ENV{'request.filename'}); 475: $file=~s/^(\w+)\/(\w+)/\/priv\/$2/; 476: # Chech that the user has permission to edit this resource 477: ($cfuname,$cfudom)=&Apache::loncacc::constructaccess($file,$1); 478: if (defined($cfudom)) { 479: if (&Apache::lonnet::homeserver($cfuname,$cfudom) 480: eq $Apache::lonnet::perlvar{'lonHostID'}) { 481: $cfile=$file; 482: } 483: } 484: } 485: # Finally, turn the button on or off 486: if ($cfile) { 487: $editbutton=&switchmenu 488: (6,1,'cstr.gif','edit','resource', 489: 'go("'.$cfile.'");',"Edit this resource"); 490: } elsif ($editbutton eq '') { 491: $editbutton = ' menu.clearbut(6,1);'; 492: } 493: } 494: ### 495: ### 496: $result = (<<ENDREGTHIS); 497: 498: <script language="JavaScript"> 499: // BEGIN LON-CAPA Internal 500: 501: function LONCAPAreg() { 502: menu=window.open("$nothing","LONCAPAmenu","",false); 503: menu.clearTimeout(menu.menucltim); 504: $timesync 505: $newmail 506: menu.currentURL=window.location.pathname; 507: menu.reloadURL=window.location.pathname; 508: menu.currentSymb="$ENV{'request.symb'}"; 509: menu.reloadSymb="$ENV{'request.symb'}"; 510: menu.currentStale=0; 511: menu.clearbut(3,1); 512: menu.switchbutton 513: (6,3,'catalog.gif','catalog','info','catalog_info()'); 514: menu.switchbutton 515: (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)','Provide my evaluation of this resource'); 516: menu.switchbutton 517: (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)','Provide feedback messages or contribute to the course discussion about this resource'); 518: menu.switchbutton 519: (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)','Prepare a printable document'); 520: menu.switchbutton 521: (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)','Go to the previous resource in the course sequence'); 522: menu.switchbutton 523: (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)','Go to the next resource in the course sequence'); 524: menu.switchbutton 525: (9,1,'sbkm.gif','set','bookmark','set_bookmark()','Set a bookmark for this resource'); 526: menu.switchbutton 527: (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()','Use or edit my bookmark collection'); 528: menu.switchbutton 529: (9,3,'anot.gif','anno-','tations','annotate()','Make notes and annotations about this resource'); 530: $hwkadd 531: $editbutton 532: } 533: 534: function LONCAPAstale() { 535: menu=window.open("$nothing","LONCAPAmenu","",false); 536: menu.currentStale=1; 537: if (menu.reloadURL!='' && menu.reloadURL!= null) { 538: menu.switchbutton 539: (3,1,'reload.gif','return','location','go(reloadURL)','Return to the last known location in the course sequence'); 540: } 541: menu.clearbut(7,1); 542: menu.clearbut(7,2); 543: menu.clearbut(7,3); 544: menu.menucltim=menu.setTimeout( 545: 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+ 546: 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3);clearbut(6,1)', 547: 2000); 548: 549: } 550: 551: // END LON-CAPA Internal 552: </script> 553: ENDREGTHIS 554: 555: } else { 556: $result = (<<ENDDONOTREGTHIS); 557: 558: <script language="JavaScript"> 559: // BEGIN LON-CAPA Internal 560: 561: function LONCAPAreg() { 562: menu=window.open("$nothing","LONCAPAmenu","",false); 563: $timesync 564: menu.currentStale=1; 565: menu.clearbut(2,1); 566: menu.clearbut(2,3); 567: menu.clearbut(8,1); 568: menu.clearbut(8,2); 569: menu.clearbut(8,3); 570: if (menu.currentURL) { 571: menu.switchbutton 572: (3,1,'reload.gif','return','location','go(currentURL)'); 573: } else { 574: menu.clearbut(3,1); 575: } 576: } 577: 578: function LONCAPAstale() { 579: } 580: 581: // END LON-CAPA Internal 582: </script> 583: ENDDONOTREGTHIS 584: } 585: return $result; 586: } 587: 588: sub loadevents() { 589: return 'LONCAPAreg();'; 590: } 591: 592: sub unloadevents() { 593: return 'LONCAPAstale();'; 594: } 595: 596: sub printalltags { 597: my $temp; 598: foreach $temp (sort keys %Apache::lonxml::alltags) { 599: &Apache::lonxml::debug("$temp -- ". 600: join(',',@{ $Apache::lonxml::alltags{$temp} })); 601: } 602: } 603: 604: sub xmlparse { 605: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_; 606: 607: &setup_globals($request,$target); 608: # 609: # do we have a course style file? 610: # 611: 612: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') { 613: my $bodytext= 614: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'}; 615: if ($bodytext) { 616: my $location=&Apache::lonnet::filelocation('',$bodytext); 617: my $styletext=&Apache::lonnet::getfile($location); 618: if ($styletext ne '-1') { 619: %style_for_target = (%style_for_target, 620: &Apache::style::styleparser($target,$styletext)); 621: } 622: } 623: } 624: 625: #&printalltags(); 626: my @pars = (); 627: my $pwd=$ENV{'request.filename'}; 628: $pwd =~ s:/[^/]*$::; 629: &newparser(\@pars,\$content_file_string,$pwd); 630: 631: my $safeeval = new Safe; 632: my $safehole = new Safe::Hole; 633: &init_safespace($target,$safeeval,$safehole,$safeinit); 634: #-------------------- Redefinition of the target in the case of compound target 635: 636: ($target, my @tenta) = split('&&',$target); 637: 638: my @stack = (); 639: my @parstack = (); 640: &initdepth; 641: 642: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars, 643: $safeeval,\%style_for_target); 644: if ($ENV{'request.uri'}) { 645: &writeallows($ENV{'request.uri'}); 646: } 647: if ($Apache::lonxml::counter_changed) { &store_counter() } 648: return $finaloutput; 649: } 650: 651: sub htmlclean { 652: my ($raw,$full)=@_; 653: 654: my $tree = HTML::TreeBuilder->new; 655: $tree->ignore_unknown(0); 656: 657: $tree->parse($raw); 658: 659: my $output= $tree->as_HTML(undef,' '); 660: 661: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis; 662: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis; 663: unless ($full) { 664: $output=~s/\<[\/]*(body|head|html)\>//gis; 665: } 666: 667: $tree = $tree->delete; 668: 669: return $output; 670: } 671: 672: sub latex_special_symbols { 673: my ($current_token,$stack,$parstack)=@_; 674: $current_token=~s/\\ /\\char92 /g; 675: $current_token=~s/\^/\\char94 /g; 676: $current_token=~s/\~/\\char126 /g; 677: $current_token=~s/(&[^a-z\#])/\\$1/g; 678: $current_token=~s/([^&])\#/$1\\#/g; 679: $current_token=~s/(\$|_|{|})/\\$1/g; 680: $current_token=~s/\\char92 /\\texttt{\\char92}/g; 681: $current_token=~s/>/\$>\$/g; #more 682: $current_token=~s/</\$<\$/g; #less 683: if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit 684: if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space 685: return $current_token; 686: } 687: 688: sub inner_xmlparse { 689: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_; 690: my $finaloutput = ''; 691: my $result; 692: my $token; 693: while ( $#$pars > -1 ) { 694: while ($token = $$pars['-1']->get_token) { 695: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) { 696: if ($metamode<1) { 697: my $text=$token->[1]; 698: if ($token->[0] eq 'C' && $target eq 'tex') { 699: $text = '%'.$text."\n"; 700: } 701: $result.=$text; 702: } 703: } elsif ($token->[0] eq 'PI') { 704: if ($metamode<1) { 705: $result=$token->[2]; 706: } 707: } elsif ($token->[0] eq 'S') { 708: # add tag to stack 709: push (@$stack,$token->[1]); 710: # add parameters list to another stack 711: push (@$parstack,&parstring($token)); 712: &increasedepth($token); 713: if ($Apache::lonxml::usestyle && 714: exists($$style_for_target{$token->[1]})) { 715: $Apache::lonxml::usestyle=0; 716: my $string=$$style_for_target{$token->[1]}. 717: '<LONCAPA_INTERNAL_TURN_STYLE_ON />'; 718: &Apache::lonxml::newparser($pars,\$string); 719: } else { 720: $result = &callsub("start_$token->[1]", $target, $token, $stack, 721: $parstack, $pars, $safeeval, $style_for_target); 722: } 723: } elsif ($token->[0] eq 'E') { 724: #clear out any tags that didn't end 725: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) { 726: my $lasttag=$$stack[-1]; 727: if ($token->[1] =~ /^$lasttag$/i) { 728: &Apache::lonxml::warning('Using tag </'.$token->[1].'> as end tag to <'.$$stack[-1].'>'); 729: last; 730: } else { 731: &Apache::lonxml::warning('Found tag </'.$token->[1].'> when looking for </'.$$stack[-1].'> in file'); 732: &end_tag($stack,$parstack,$token); 733: } 734: } 735: 736: if ($Apache::lonxml::usestyle && 737: exists($$style_for_target{'/'."$token->[1]"})) { 738: $Apache::lonxml::usestyle=0; 739: my $string=$$style_for_target{'/'.$token->[1]}. 740: '<LONCAPA_INTERNAL_TURN_STYLE_ON />'; 741: &Apache::lonxml::newparser($pars,\$string); 742: } else { 743: $result = &callsub("end_$token->[1]", $target, $token, $stack, 744: $parstack, $pars,$safeeval, $style_for_target); 745: } 746: } else { 747: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:"); 748: } 749: #evaluate variable refs in result 750: if ($result ne "") { 751: if ( $#$parstack > -1 ) { 752: $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]); 753: } else { 754: $result= &Apache::run::evaluate($result,$safeeval,''); 755: } 756: } 757: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) { 758: if ($target eq 'tex') { 759: $result=&latex_special_symbols($result,$stack,$parstack); 760: } 761: } 762: 763: # Encode any high ASCII characters 764: if (!$Apache::lonxml::prevent_entity_encode) { 765: $result=&HTML::Entities::encode($result,"\200-\377"); 766: } 767: if ($Apache::lonxml::redirection) { 768: $Apache::lonxml::outputstack['-1'] .= $result; 769: } else { 770: $finaloutput.=$result; 771: } 772: $result = ''; 773: 774: if ($token->[0] eq 'E') { 775: &end_tag($stack,$parstack,$token); 776: } 777: } 778: if ($#$pars > -1) { 779: pop @$pars; 780: pop @Apache::lonxml::pwd; 781: } 782: } 783: 784: # if ($target eq 'meta') { 785: # $finaloutput.=&endredirection; 786: # } 787: 788: 789: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) { 790: $finaloutput=&afterburn($finaloutput); 791: } 792: return $finaloutput; 793: } 794: 795: sub callsub { 796: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 797: my $currentstring=''; 798: my $nodefault; 799: { 800: my $sub1; 801: no strict 'refs'; 802: my $tag=$token->[1]; 803: my $space=$Apache::lonxml::alltags{$tag}[-1]; 804: if (!$space) { 805: $tag=~tr/A-Z/a-z/; 806: $sub=~tr/A-Z/a-z/; 807: $space=$Apache::lonxml::alltags{$tag}[-1] 808: } 809: 810: my $deleted=0; 811: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); 812: if (($token->[0] eq 'S') && ($target eq 'modified')) { 813: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack, 814: $parstack,$parser,$safeeval, 815: $style); 816: } 817: if (!$deleted) { 818: if ($space) { 819: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode"); 820: $sub1="$space\:\:$sub"; 821: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack, 822: $parstack,$parser,$safeeval, 823: $style); 824: } else { 825: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode"); 826: if ($metamode <1) { 827: if (defined($token->[4]) && ($metamode < 1)) { 828: $currentstring = $token->[4]; 829: } else { 830: $currentstring = $token->[2]; 831: } 832: } 833: } 834: # &Apache::lonxml::debug("nodefalt:$nodefault:"); 835: if ($currentstring eq '' && $nodefault eq '') { 836: if ($target eq 'edit') { 837: #&Apache::lonxml::debug("doing default edit for $token->[1]"); 838: if ($token->[0] eq 'S') { 839: $currentstring = &Apache::edit::tag_start($target,$token); 840: } elsif ($token->[0] eq 'E') { 841: $currentstring = &Apache::edit::tag_end($target,$token); 842: } 843: } elsif ($target eq 'modified') { 844: if ($token->[0] eq 'S') { 845: $currentstring = $token->[4]; 846: $currentstring.=&Apache::edit::handle_insert(); 847: } elsif ($token->[0] eq 'E') { 848: $currentstring = $token->[2]; 849: $currentstring.=&Apache::edit::handle_insertafter($token->[1]); 850: } else { 851: $currentstring = $token->[2]; 852: } 853: } 854: } 855: } 856: use strict 'refs'; 857: } 858: return $currentstring; 859: } 860: 861: sub setup_globals { 862: my ($request,$target)=@_; 863: $Apache::lonxml::request=$request; 864: $Apache::lonxml::registered = 0; 865: $errorcount=0; 866: $warningcount=0; 867: $Apache::lonxml::default_homework_loaded=0; 868: $Apache::lonxml::usestyle=1; 869: &init_counter(); 870: @Apache::lonxml::pwd=(); 871: @Apache::lonxml::extlinks=(); 872: if ($target eq 'meta') { 873: $Apache::lonxml::redirection = 0; 874: $Apache::lonxml::metamode = 1; 875: $Apache::lonxml::evaluate = 1; 876: $Apache::lonxml::import = 0; 877: } elsif ($target eq 'answer') { 878: $Apache::lonxml::redirection = 0; 879: $Apache::lonxml::metamode = 1; 880: $Apache::lonxml::evaluate = 1; 881: $Apache::lonxml::import = 1; 882: } elsif ($target eq 'grade') { 883: &startredirection; 884: $Apache::lonxml::metamode = 0; 885: $Apache::lonxml::evaluate = 1; 886: $Apache::lonxml::import = 1; 887: } elsif ($target eq 'modified') { 888: $Apache::lonxml::redirection = 0; 889: $Apache::lonxml::metamode = 0; 890: $Apache::lonxml::evaluate = 0; 891: $Apache::lonxml::import = 0; 892: } elsif ($target eq 'edit') { 893: $Apache::lonxml::redirection = 0; 894: $Apache::lonxml::metamode = 0; 895: $Apache::lonxml::evaluate = 0; 896: $Apache::lonxml::import = 0; 897: } elsif ($target eq 'analyze') { 898: $Apache::lonxml::redirection = 0; 899: $Apache::lonxml::metamode = 0; 900: $Apache::lonxml::evaluate = 1; 901: $Apache::lonxml::import = 1; 902: } else { 903: $Apache::lonxml::redirection = 0; 904: $Apache::lonxml::metamode = 0; 905: $Apache::lonxml::evaluate = 1; 906: $Apache::lonxml::import = 1; 907: } 908: } 909: 910: sub init_safespace { 911: my ($target,$safeeval,$safehole,$safeinit) = @_; 912: $safeeval->permit("entereval"); 913: $safeeval->permit(":base_math"); 914: $safeeval->permit("sort"); 915: $safeeval->deny(":base_io"); 916: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse'); 917: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); 918: 919: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin'); 920: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos'); 921: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan'); 922: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh'); 923: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh'); 924: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh'); 925: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh'); 926: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh'); 927: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh'); 928: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf'); 929: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc'); 930: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0'); 931: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1'); 932: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn'); 933: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv'); 934: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0'); 935: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1'); 936: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn'); 937: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv'); 938: 939: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' ); 940: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' ); 941: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' ); 942: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' ); 943: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' ); 944: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc'); 945: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri'); 946: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' ); 947: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' ); 948: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' ); 949: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' ); 950: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' ); 951: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' ); 952: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc'); 953: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri'); 954: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' ); 955: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' ); 956: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' ); 957: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' ); 958: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' ); 959: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' ); 960: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri'); 961: 962: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract'); 963: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd'); 964: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub'); 965: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul'); 966: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv'); 967: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid'); 968: 969: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta'); 970: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square'); 971: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential'); 972: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f'); 973: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma'); 974: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal'); 975: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial'); 976: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square'); 977: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f'); 978: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal'); 979: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation'); 980: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index'); 981: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform'); 982: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson'); 983: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer'); 984: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial'); 985: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial'); 986: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase'); 987: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase'); 988: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed'); 989: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed'); 990: 991: #need to inspect this class of ops 992: # $safeeval->deny(":base_orig"); 993: $safeinit .= ';$external::target="'.$target.'";'; 994: my $rndseed; 995: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); 996: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name); 997: $safeinit .= ';$external::randomseed='.$rndseed.';'; 998: &Apache::run::run($safeinit,$safeeval); 999: } 1000: 1001: sub default_homework_load { 1002: my ($safeeval)=@_; 1003: &Apache::lonxml::debug('Loading default_homework'); 1004: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm'); 1005: if ($default == -1) { 1006: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>"); 1007: } else { 1008: &Apache::run::run($default,$safeeval); 1009: $Apache::lonxml::default_homework_loaded=1; 1010: } 1011: } 1012: 1013: sub startredirection { 1014: $Apache::lonxml::redirection++; 1015: push (@Apache::lonxml::outputstack, ''); 1016: } 1017: 1018: sub endredirection { 1019: if (!$Apache::lonxml::redirection) { 1020: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller); 1021: return ''; 1022: } 1023: $Apache::lonxml::redirection--; 1024: pop @Apache::lonxml::outputstack; 1025: } 1026: 1027: sub end_tag { 1028: my ($tagstack,$parstack,$token)=@_; 1029: pop(@$tagstack); 1030: pop(@$parstack); 1031: &decreasedepth($token); 1032: } 1033: 1034: sub initdepth { 1035: @Apache::lonxml::depthcounter=(); 1036: $Apache::lonxml::depth=-1; 1037: $Apache::lonxml::olddepth=-1; 1038: } 1039: 1040: sub increasedepth { 1041: my ($token) = @_; 1042: $Apache::lonxml::depth++; 1043: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++; 1044: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) { 1045: $Apache::lonxml::olddepth=$Apache::lonxml::depth; 1046: } 1047: my $curdepth=join('_',@Apache::lonxml::depthcounter); 1048: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"); 1049: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"; 1050: } 1051: 1052: sub decreasedepth { 1053: my ($token) = @_; 1054: $Apache::lonxml::depth--; 1055: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) { 1056: $#Apache::lonxml::depthcounter--; 1057: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1; 1058: } 1059: if ( $Apache::lonxml::depth < -1) { 1060: &Apache::lonxml::warning("Missing tags, unable to properly run file."); 1061: $Apache::lonxml::depth='-1'; 1062: } 1063: my $curdepth=join('_',@Apache::lonxml::depthcounter); 1064: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"); 1065: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"; 1066: } 1067: 1068: sub get_all_text_unbalanced { 1069: #there is a copy of this in lonpublisher.pm 1070: my($tag,$pars)= @_; 1071: my $token; 1072: my $result=''; 1073: $tag='<'.$tag.'>'; 1074: while ($token = $$pars[-1]->get_token) { 1075: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { 1076: $result.=$token->[1]; 1077: } elsif ($token->[0] eq 'PI') { 1078: $result.=$token->[2]; 1079: } elsif ($token->[0] eq 'S') { 1080: $result.=$token->[4]; 1081: } elsif ($token->[0] eq 'E') { 1082: $result.=$token->[2]; 1083: } 1084: if ($result =~ /(.*)\Q$tag\E(.*)/s) { 1085: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2); 1086: &Apache::lonxml::debug('Result is :'.$1); 1087: $result=$1; 1088: my $redo=$tag.$2; 1089: &Apache::lonxml::newparser($pars,\$redo); 1090: last; 1091: } 1092: } 1093: return $result 1094: } 1095: 1096: sub increment_counter { 1097: $Apache::lonxml::counter++; 1098: $Apache::lonxml::counter_changed=1; 1099: } 1100: 1101: sub init_counter { 1102: if (defined($ENV{'form.counter'})) { 1103: $Apache::lonxml::counter=$ENV{'form.counter'}; 1104: } elsif (not defined($Apache::lonxml::counter)) { 1105: $Apache::lonxml::counter=1; 1106: &store_counter(); 1107: } 1108: $Apache::lonxml::counter_changed=0; 1109: } 1110: 1111: sub store_counter { 1112: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter)); 1113: return ''; 1114: } 1115: 1116: sub get_all_text { 1117: my($tag,$pars)= @_; 1118: &Apache::lonxml::debug("Got a ".ref($pars)); 1119: my $gotfullstack=1; 1120: if (ref($pars) ne 'ARRAY') { 1121: $gotfullstack=0; 1122: $pars=[$pars]; 1123: } 1124: my $depth=0; 1125: my $token; 1126: my $result=''; 1127: if ( $tag =~ m:^/: ) { 1128: my $tag=substr($tag,1); 1129: #&Apache::lonxml::debug("have:$tag:"); 1130: my $top_empty=0; 1131: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) { 1132: while (($depth >=0) && ($token = $$pars[-1]->get_token)) { 1133: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd); 1134: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { 1135: $result.=$token->[1]; 1136: } elsif ($token->[0] eq 'PI') { 1137: $result.=$token->[2]; 1138: } elsif ($token->[0] eq 'S') { 1139: if ($token->[1] =~ /^$tag$/i) { $depth++; } 1140: $result.=$token->[4]; 1141: } elsif ($token->[0] eq 'E') { 1142: if ( $token->[1] =~ /^$tag$/i) { $depth--; } 1143: #skip sending back the last end tag 1144: if ($depth > -1) { $result.=$token->[2]; } else { 1145: $$pars[-1]->unget_token($token); 1146: } 1147: } 1148: } 1149: if (($depth >=0) && ($#$pars > 0) ) { 1150: pop(@$pars); 1151: pop(@Apache::lonxml::pwd); 1152: } 1153: if (($depth >=0) && ($#$pars == 0) ) { &debug("here4");$top_empty=1; } 1154: } 1155: if ($top_empty && $depth >= 0) { 1156: #never found the end tag ran out of text, throw error send back blank 1157: &error('Never found end tag for <'.$tag.'>'); 1158: if ($gotfullstack) { 1159: my $newstring='</'.$tag.'>'.$result; 1160: &Apache::lonxml::newparser($pars,\$newstring); 1161: } 1162: $result=''; 1163: } 1164: } else { 1165: while ($#$pars > -1) { 1166: while ($token = $$pars[-1]->get_token) { 1167: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]"); 1168: if (($token->[0] eq 'T')||($token->[0] eq 'C')|| 1169: ($token->[0] eq 'D')) { 1170: $result.=$token->[1]; 1171: } elsif ($token->[0] eq 'PI') { 1172: $result.=$token->[2]; 1173: } elsif ($token->[0] eq 'S') { 1174: if ( $token->[1] =~ /^$tag$/i) { 1175: $$pars[-1]->unget_token($token); last; 1176: } else { 1177: $result.=$token->[4]; 1178: } 1179: } elsif ($token->[0] eq 'E') { 1180: $result.=$token->[2]; 1181: } 1182: } 1183: if (($#$pars > 0) ) { 1184: pop(@$pars); 1185: pop(@Apache::lonxml::pwd); 1186: } else { last; } 1187: } 1188: } 1189: if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) { 1190: $Apache::lonxml::usestyle=1; 1191: } 1192: #&Apache::lonxml::debug("Exit:$result:"); 1193: return $result 1194: } 1195: 1196: sub newparser { 1197: my ($parser,$contentref,$dir) = @_; 1198: push (@$parser,HTML::LCParser->new($contentref)); 1199: $$parser['-1']->xml_mode('1'); 1200: if ( $dir eq '' ) { 1201: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]); 1202: } else { 1203: push (@Apache::lonxml::pwd, $dir); 1204: } 1205: # &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd"); 1206: # &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]"); 1207: } 1208: 1209: sub parstring { 1210: my ($token) = @_; 1211: my $temp=''; 1212: foreach (@{$token->[3]}) { 1213: unless ($_=~/\W/) { 1214: my $val=$token->[2]->{$_}; 1215: $val =~ s/([\%\@\\\"])/\\$1/g; 1216: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; } 1217: $temp .= "my \$$_=\"$val\";" 1218: } 1219: } 1220: return $temp; 1221: } 1222: 1223: sub writeallows { 1224: unless ($#extlinks>=0) { return; } 1225: my $thisurl='/res/'.&Apache::lonnet::declutter(shift); 1226: if ($ENV{'httpref.'.$thisurl}) { 1227: $thisurl=$ENV{'httpref.'.$thisurl}; 1228: } 1229: my $thisdir=$thisurl; 1230: $thisdir=~s/\/[^\/]+$//; 1231: my %httpref=(); 1232: foreach (@extlinks) { 1233: $httpref{'httpref.'. 1234: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; 1235: } 1236: @extlinks=(); 1237: &Apache::lonnet::appenv(%httpref); 1238: } 1239: 1240: # 1241: # Afterburner handles anchors, highlights and links 1242: # 1243: sub afterburn { 1244: my $result=shift; 1245: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, 1246: ['highlight','anchor','link']); 1247: if ($ENV{'form.highlight'}) { 1248: foreach (split(/\,/,$ENV{'form.highlight'})) { 1249: my $anchorname=$_; 1250: my $matchthis=$anchorname; 1251: $matchthis=~s/\_+/\\s\+/g; 1252: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs; 1253: } 1254: } 1255: if ($ENV{'form.link'}) { 1256: foreach (split(/\,/,$ENV{'form.link'})) { 1257: my ($anchorname,$linkurl)=split(/\>/,$_); 1258: my $matchthis=$anchorname; 1259: $matchthis=~s/\_+/\\s\+/g; 1260: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs; 1261: } 1262: } 1263: if ($ENV{'form.anchor'}) { 1264: my $anchorname=$ENV{'form.anchor'}; 1265: my $matchthis=$anchorname; 1266: $matchthis=~s/\_+/\\s\+/g; 1267: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s; 1268: $result.=(<<"ENDSCRIPT"); 1269: <script> 1270: document.location.hash='$anchorname'; 1271: </script> 1272: ENDSCRIPT 1273: } 1274: return $result; 1275: } 1276: 1277: sub storefile { 1278: my ($file,$contents)=@_; 1279: if (my $fh=Apache::File->new('>'.$file)) { 1280: print $fh $contents; 1281: $fh->close(); 1282: } else { 1283: &warning("Unable to save file $file"); 1284: } 1285: } 1286: 1287: sub createnewhtml { 1288: my $filecontents=(<<SIMPLECONTENT); 1289: <html> 1290: <head> 1291: <title> 1292: Title of Document Goes Here 1293: </title> 1294: </head> 1295: <body bgcolor="#FFFFFF"> 1296: 1297: Body of Document Goes Here 1298: 1299: </body> 1300: </html> 1301: SIMPLECONTENT 1302: return $filecontents; 1303: } 1304: 1305: 1306: sub inserteditinfo { 1307: my ($result,$filecontents)=@_; 1308: $filecontents = &HTML::Entities::encode($filecontents); 1309: # my $editheader='<a href="#editsection">Edit below</a><hr />'; 1310: my $buttons=(<<BUTTONS); 1311: <input type="submit" name="attemptclean" 1312: value="Save and then attempt to clean HTML" /> 1313: <input type="submit" name="savethisfile" value="Save this" /> 1314: <input type="submit" name="viewmode" value="View" /> 1315: BUTTONS 1316: my $editfooter=(<<ENDFOOTER); 1317: <hr /> 1318: <a name="editsection" /> 1319: <form method="post"> 1320: <input type="hidden" name="editmode" value="Edit" /> 1321: $buttons<br /> 1322: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea> 1323: <br />$buttons 1324: <br /> 1325: </form> 1326: ENDFOOTER 1327: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is; 1328: $result=~s/(\<\/body\>)/$editfooter/is; 1329: return $result; 1330: } 1331: 1332: sub get_target { 1333: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}); 1334: if ( $ENV{'request.state'} eq 'published') { 1335: if ( defined($ENV{'form.grade_target'}) 1336: && ($viewgrades == 'F' )) { 1337: return ($ENV{'form.grade_target'}); 1338: } elsif (defined($ENV{'form.grade_target'})) { 1339: if (($ENV{'form.grade_target'} eq 'web') || 1340: ($ENV{'form.grade_target'} eq 'tex') ) { 1341: return $ENV{'form.grade_target'} 1342: } else { 1343: return 'web'; 1344: } 1345: } else { 1346: return 'web'; 1347: } 1348: } elsif ($ENV{'request.state'} eq 'construct') { 1349: if ( defined($ENV{'form.grade_target'})) { 1350: return ($ENV{'form.grade_target'}); 1351: } else { 1352: return 'web'; 1353: } 1354: } else { 1355: return 'web'; 1356: } 1357: } 1358: 1359: sub handler { 1360: my $request=shift; 1361: 1362: my $target=&get_target(); 1363: 1364: $Apache::lonxml::debug=0; 1365: 1366: if ($ENV{'browser.mathml'}) { 1367: $request->content_type('text/xml'); 1368: } else { 1369: $request->content_type('text/html'); 1370: } 1371: &Apache::loncommon::no_cache($request); 1372: $request->send_http_header; 1373: 1374: return OK if $request->header_only; 1375: 1376: 1377: my $file=&Apache::lonnet::filelocation("",$request->uri); 1378: # 1379: # Edit action? Save file. 1380: # 1381: unless ($ENV{'request.state'} eq 'published') { 1382: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) { 1383: &storefile($file,$ENV{'form.filecont'}); 1384: } 1385: } 1386: my %mystyle; 1387: my $result = ''; 1388: my $filecontents=&Apache::lonnet::getfile($file); 1389: if ($filecontents == -1) { 1390: $result=(<<ENDNOTFOUND); 1391: <html> 1392: <head> 1393: <title>File not found</title> 1394: </head> 1395: <body bgcolor="#FFFFFF"> 1396: <b>File not found: $file</b> 1397: </body> 1398: </html> 1399: ENDNOTFOUND 1400: $filecontents=''; 1401: if ($ENV{'request.state'} ne 'published') { 1402: $filecontents=&createnewhtml(); 1403: $ENV{'form.editmode'}='Edit'; #force edit mode 1404: } 1405: } else { 1406: unless ($ENV{'request.state'} eq 'published') { 1407: if ($ENV{'form.attemptclean'}) { 1408: $filecontents=&htmlclean($filecontents,1); 1409: } 1410: } 1411: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) { 1412: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents, 1413: '',%mystyle); 1414: } 1415: } 1416: 1417: # 1418: # Edit action? Insert editing commands 1419: # 1420: unless ($ENV{'request.state'} eq 'published') { 1421: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) { 1422: my $displayfile=$request->uri; 1423: $displayfile=~s/^\/[^\/]*//; 1424: $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile. 1425: '</h3></body></html>'; 1426: $result=&inserteditinfo($result,$filecontents); 1427: } 1428: } 1429: 1430: writeallows($request->uri); 1431: 1432: $request->print($result); 1433: 1434: return OK; 1435: } 1436: 1437: sub debug { 1438: if ($Apache::lonxml::debug eq 1) { 1439: $|=1; 1440: print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n"); 1441: } 1442: } 1443: 1444: sub error { 1445: $errorcount++; 1446: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) { 1447: # If printing in construction space, put the error inside <pre></pre> 1448: print "<b>ERROR:</b>".join("\n",@_)."\n"; 1449: } else { 1450: print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />"; 1451: #notify author 1452: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_)); 1453: #notify course 1454: if ( $ENV{'request.course.id'} ) { 1455: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1); 1456: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'}); 1457: foreach (keys %users) { 1458: my ($user,$domain) = split(/:/, $_); 1459: &Apache::lonmsg::user_normal_msg($user,$domain, 1460: "Error [$declutter]",join('<br />',@_)); 1461: } 1462: } 1463: 1464: #FIXME probably shouldn't have me get everything forever. 1465: &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_)); 1466: #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]); 1467: } 1468: } 1469: 1470: sub warning { 1471: $warningcount++; 1472: if ($ENV{'request.state'} eq 'construct') { 1473: print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n"; 1474: } 1475: } 1476: 1477: sub get_param { 1478: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_; 1479: if ( ! $context ) { $context = -1; } 1480: my $args =''; 1481: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; } 1482: if ( ! $args ) { return undef; } 1483: if ( $case_insensitive ) { 1484: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) { 1485: return &Apache::run::run("{$args;".'return $'.$param.'}', 1486: $safeeval); #' 1487: } else { 1488: return undef; 1489: } 1490: } else { 1491: if ( $args =~ /my \$\Q$param\E=\"/ ) { 1492: return &Apache::run::run("{$args;".'return $'.$param.'}', 1493: $safeeval); #' 1494: } else { 1495: return undef; 1496: } 1497: } 1498: } 1499: 1500: sub get_param_var { 1501: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_; 1502: if ( ! $context ) { $context = -1; } 1503: my $args =''; 1504: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; } 1505: if ($case_insensitive) { 1506: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) { 1507: return undef; 1508: } 1509: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; } 1510: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #' 1511: if ($value =~ /^[\$\@\%]/) { 1512: return &Apache::run::run("return $value",$safeeval,1); 1513: } else { 1514: return $value; 1515: } 1516: } 1517: 1518: sub register_insert { 1519: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab'); 1520: my $i; 1521: my $tagnum=0; 1522: my @order; 1523: for ($i=0;$i < $#data; $i++) { 1524: my $line = $data[$i]; 1525: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; } 1526: if ( $line =~ /TABLE/ ) { last; } 1527: my ($tag,$descrip,$color,$function,$show) = split(/,/, $line); 1528: if ($tag) { 1529: $insertlist{"$tagnum.tag"} = $tag; 1530: $insertlist{"$tagnum.description"} = $descrip; 1531: $insertlist{"$tagnum.color"} = $color; 1532: $insertlist{"$tagnum.function"} = $function; 1533: if (!defined($show)) { $show='yes'; } 1534: $insertlist{"$tagnum.show"}= $show; 1535: $insertlist{"$tag.num"}=$tagnum; 1536: $tagnum++; 1537: } 1538: } 1539: $i++; #skipping TABLE line 1540: $tagnum = 0; 1541: for (;$i < $#data;$i++) { 1542: my $line = $data[$i]; 1543: my ($mnemonic,@which) = split(/ +/,$line); 1544: my $tag = $insertlist{"$tagnum.tag"}; 1545: for (my $j=0;$j <=$#which;$j++) { 1546: if ( $which[$j] eq 'Y' ) { 1547: if ($insertlist{"$j.show"} ne 'no') { 1548: push(@{ $insertlist{"$tag.which"} },$j); 1549: } 1550: } 1551: } 1552: $tagnum++; 1553: } 1554: } 1555: 1556: sub description { 1557: my ($token)=@_; 1558: my $tagnum; 1559: my $tag=$token->[1]; 1560: foreach my $namespace (reverse @Apache::lonxml::namespace) { 1561: my $testtag=$namespace.'::'.$tag; 1562: $tagnum=$insertlist{"$testtag.num"}; 1563: if (defined($tagnum)) { last; } 1564: } 1565: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; } 1566: return $insertlist{$tagnum.'.description'}; 1567: } 1568: 1569: # ----------------------------------------------------------------- whichuser 1570: # returns a list of $symb, $courseid, $domain, $name that is correct for 1571: # calls to lonnet functions for this setup. 1572: # - looks for form.grade_ parameters 1573: sub whichuser { 1574: my ($symb,$courseid,$domain,$name); 1575: if (defined($ENV{'form.grade_symb'})) { 1576: my $tmp_courseid=$ENV{'form.grade_courseid'}; 1577: my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid); 1578: if ($allowed) { 1579: $symb=$ENV{'form.grade_symb'}; 1580: $courseid=$ENV{'form.grade_courseid'}; 1581: $domain=$ENV{'form.grade_domain'}; 1582: $name=$ENV{'form.grade_username'}; 1583: } 1584: } else { 1585: $symb=&Apache::lonnet::symbread(); 1586: $courseid=$ENV{'request.course.id'}; 1587: $domain=$ENV{'user.domain'}; 1588: $name=$ENV{'user.name'}; 1589: } 1590: return ($symb,$courseid,$domain,$name); 1591: } 1592: 1593: 1; 1594: __END__ 1595: 1596: