loncom/xml/lonxml.pm - view

File: [LON-CAPA] / loncom / xml / lonxml.pm
Revision 1.311: download - view: text, annotated - select for diffs
Fri Mar 19 22:01:13 2004 UTC (20 years, 2 months ago) by albertel
Branches: MAIN
CVS tags: HEAD

- Fixes the order in which things get escaped, with the old order things like &deg; broke
  now it
   a) escapes individually the special characters except for & and #
   b) converts HTML entity references to correct TeX
   c) escapes any & or # that aren't preceded by \

1: # The LearningOnline Network with CAPA 2: # XML Parser Module 3: # 4: # $Id: lonxml.pm,v 1.311 2004/03/19 22:01:13 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: # 5/26 Gerd Kortemeyer 45: # 5/27 H. K. Ng 46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer 47: # 6/12,6/13 H. K. Ng 48: # 6/16 Gerd Kortemeyer 49: # 7/27 H. K. Ng 50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer 51: # Guy Albertelli 52: # 9/26 Gerd Kortemeyer 53: # Dec Guy Albertelli 54: # YEAR=2002 55: # 1/1 Gerd Kortemeyer 56: # 1/2 Matthew Hall 57: # 1/3 Gerd Kortemeyer 58: # 59: 60: package Apache::lonxml; 61: use vars 62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount); 63: use strict; 64: use HTML::LCParser(); 65: use HTML::TreeBuilder(); 66: use HTML::Entities(); 67: use Safe(); 68: use Safe::Hole(); 69: use Math::Cephes(); 70: use Math::Random(); 71: use Opcode(); 72: use POSIX qw(strftime); 73: 74: 75: sub register { 76: my ($space,@taglist) = @_; 77: foreach my $temptag (@taglist) { 78: push(@{ $Apache::lonxml::alltags{$temptag} },$space); 79: } 80: } 81: 82: sub deregister { 83: my ($space,@taglist) = @_; 84: foreach my $temptag (@taglist) { 85: my $tempspace = $Apache::lonxml::alltags{$temptag}[-1]; 86: if ($tempspace eq $space) { 87: pop(@{ $Apache::lonxml::alltags{$temptag} }); 88: } 89: } 90: #&printalltags(); 91: } 92: 93: use Apache::Constants qw(:common); 94: use Apache::lontexconvert(); 95: use Apache::style(); 96: use Apache::run(); 97: use Apache::londefdef(); 98: use Apache::scripttag(); 99: use Apache::languagetags(); 100: use Apache::edit(); 101: use Apache::inputtags(); 102: use Apache::outputtags(); 103: use Apache::lonnet(); 104: use Apache::File(); 105: use Apache::loncommon(); 106: use Apache::lonfeedback(); 107: use Apache::lonmsg(); 108: use Apache::loncacc(); 109: use Apache::lonlocal; 110: 111: #================================================== Main subroutine: xmlparse 112: #debugging control, to turn on debugging modify the correct handler 113: $Apache::lonxml::debug=0; 114: 115: # keeps count of the number of warnings and errors generated in a parse 116: $warningcount=0; 117: $errorcount=0; 118: 119: #path to the directory containing the file currently being processed 120: @pwd=(); 121: 122: #these two are used for capturing a subset of the output for later processing, 123: #don't touch them directly use &startredirection and &endredirection 124: @outputstack = (); 125: $redirection = 0; 126: 127: #controls wheter the <import> tag actually does 128: $import = 1; 129: @extlinks=(); 130: 131: # meta mode is a bit weird only some output is to be turned off 132: #<output> tag turns metamode off (defined in londefdef.pm) 133: $metamode = 0; 134: 135: # turns on and of run::evaluate actually derefencing var refs 136: $evaluate = 1; 137: 138: # data structure for eidt mode, determines what tags can go into what other tags 139: %insertlist=(); 140: 141: # stores the list of active tag namespaces 142: @namespace=(); 143: 144: # if 0 all high ASCII characters will be encoded into HTML Entities 145: $prevent_entity_encode=0; 146: 147: # has the dynamic menu been updated to know about this resource 148: $Apache::lonxml::registered=0; 149: 150: # a pointer the the Apache request object 151: $Apache::lonxml::request=''; 152: 153: # a problem number counter, and check on ether it is used 154: $Apache::lonxml::counter=1; 155: $Apache::lonxml::counter_changed=0; 156: 157: #internal check on whether to look at style defs 158: $Apache::lonxml::usestyle=1; 159: 160: #locations used to store the parameter string for style substitutions 161: $Apache::lonxml::style_values=''; 162: $Apache::lonxml::style_end_values=''; 163: 164: #array of ssi calls that need to occur after we are done parsing 165: @Apache::lonxml::ssi_info=(); 166: 167: #should we do the postag variable interpolation 168: $Apache::lonxml::post_evaluate=1; 169: 170: #a header message to emit in the case of any generated warning or errors 171: $Apache::lonxml::warnings_error_header=''; 172: 173: sub xmlbegin { 174: my $output=''; 175: if ($ENV{'browser.mathml'}) { 176: $output='<?xml version="1.0"?>' 177: .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>' 178: .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" ' 179: .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>' 180: .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 181: .'xmlns="http://www.w3.org/TR/REC-html40">'; 182: } else { 183: $output='<html>'; 184: } 185: return $output; 186: } 187: 188: sub xmlend { 189: my $mode='xml'; 190: my $status='OPEN'; 191: if ($Apache::lonhomework::parsing_a_problem) { 192: $mode='problem'; 193: $status=$Apache::inputtags::status[-1]; 194: } 195: return &Apache::lonfeedback::list_discussion($mode,$status).'</html>'; 196: } 197: 198: sub tokeninputfield { 199: my $defhost=$Apache::lonnet::perlvar{'lonHostID'}; 200: $defhost=~tr/a-z/A-Z/; 201: return (<<ENDINPUTFIELD) 202: <script type="text/javascript"> 203: function updatetoken() { 204: var comp=new Array; 205: var barcode=unescape(document.tokeninput.barcode.value); 206: comp=barcode.split('*'); 207: if (typeof(comp[0])!="undefined") { 208: document.tokeninput.codeone.value=comp[0]; 209: } 210: if (typeof(comp[1])!="undefined") { 211: document.tokeninput.codetwo.value=comp[1]; 212: } 213: if (typeof(comp[2])!="undefined") { 214: comp[2]=comp[2].toUpperCase(); 215: document.tokeninput.codethree.value=comp[2]; 216: } 217: document.tokeninput.barcode.value=''; 218: } 219: </script> 220: <form method="post" name="tokeninput"> 221: <table border="2" bgcolor="#FFFFBB"> 222: <tr><th>DocID Checkin</th></tr> 223: <tr><td> 224: <table> 225: <tr> 226: <td>Scan in Barcode</td> 227: <td><input type="text" size="22" name="barcode" 228: onChange="updatetoken()"/></td> 229: </tr> 230: <tr><td><i>or</i> Type in DocID</td> 231: <td> 232: <input type="text" size="5" name="codeone" /> 233: <b><font size="+2">*</font></b> 234: <input type="text" size="5" name="codetwo" /> 235: <b><font size="+2">*</font></b> 236: <input type="text" size="10" name="codethree" value="$defhost" 237: onChange="this.value=this.value.toUpperCase()" /> 238: </td></tr> 239: </table> 240: </td></tr> 241: <tr><td><input type="submit" value="Check in DocID" /></td></tr> 242: </table> 243: </form> 244: ENDINPUTFIELD 245: } 246: 247: sub maketoken { 248: my ($symb,$tuname,$tudom,$tcrsid)=@_; 249: unless ($symb) { 250: $symb=&Apache::lonnet::symbread(); 251: } 252: unless ($tuname) { 253: $tuname=$ENV{'user.name'}; 254: $tudom=$ENV{'user.domain'}; 255: $tcrsid=$ENV{'request.course.id'}; 256: } 257: 258: return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid); 259: } 260: 261: sub printtokenheader { 262: my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_; 263: unless ($token) { return ''; } 264: 265: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); 266: unless ($tsymb) { 267: $tsymb=$symb; 268: } 269: unless ($tuname) { 270: $tuname=$name; 271: $tudom=$domain; 272: $tcrsid=$courseid; 273: } 274: 275: my %reply=&Apache::lonnet::get('environment', 276: ['firstname','middlename','lastname','generation'], 277: $tudom,$tuname); 278: my $plainname=$reply{'firstname'}.' '. 279: $reply{'middlename'}.' '. 280: $reply{'lastname'}.' '. 281: $reply{'generation'}; 282: 283: if ($target eq 'web') { 284: my %idhash=&Apache::lonnet::idrget($tudom,($tuname)); 285: return 286: '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'. 287: &mt('Checked out for').' '.$plainname. 288: '<br />'.&mt('User').': '.$tuname.' at '.$tudom. 289: '<br />'.&mt('ID').': '.$idhash{$tuname}. 290: '<br />'.&mt('CourseID').': '.$tcrsid. 291: '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}. 292: '<br />'.&mt('DocID').': '.$token. 293: '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />'; 294: } else { 295: return $token; 296: } 297: } 298: 299: sub fontsettings() { 300: my $headerstring=''; 301: if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 302: $headerstring.= 303: '<meta Content-Type="text/html; charset=x-mac-roman">'; 304: } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) { 305: $headerstring.= 306: '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />'; 307: } 308: return $headerstring; 309: } 310: 311: sub printalltags { 312: my $temp; 313: foreach $temp (sort keys %Apache::lonxml::alltags) { 314: &Apache::lonxml::debug("$temp -- ". 315: join(',',@{ $Apache::lonxml::alltags{$temp} })); 316: } 317: } 318: 319: sub xmlparse { 320: my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_; 321: 322: &setup_globals($request,$target); 323: &Apache::inputtags::initialize_inputtags(); 324: &Apache::outputtags::initialize_outputtags(); 325: &Apache::edit::initialize_edit(); 326: &Apache::londefdef::initialize_londefdef(); 327: 328: # 329: # do we have a course style file? 330: # 331: 332: if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') { 333: my $bodytext= 334: $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'}; 335: if ($bodytext) { 336: my $location=&Apache::lonnet::filelocation('',$bodytext); 337: my $styletext=&Apache::lonnet::getfile($location); 338: if ($styletext ne '-1') { 339: %style_for_target = (%style_for_target, 340: &Apache::style::styleparser($target,$styletext)); 341: } 342: } 343: } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) { 344: my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'}); 345: my $styletext=&Apache::lonnet::getfile($location); 346: if ($styletext ne '-1') { 347: %style_for_target = (%style_for_target, 348: &Apache::style::styleparser($target,$styletext)); 349: } 350: } 351: #&printalltags(); 352: my @pars = (); 353: my $pwd=$ENV{'request.filename'}; 354: $pwd =~ s:/[^/]*$::; 355: &newparser(\@pars,\$content_file_string,$pwd); 356: 357: my $safeeval = new Safe; 358: my $safehole = new Safe::Hole; 359: &init_safespace($target,$safeeval,$safehole,$safeinit); 360: #-------------------- Redefinition of the target in the case of compound target 361: 362: ($target, my @tenta) = split('&&',$target); 363: 364: my @stack = (); 365: my @parstack = (); 366: &initdepth; 367: 368: my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars, 369: $safeeval,\%style_for_target); 370: 371: if ($ENV{'request.uri'}) { 372: &writeallows($ENV{'request.uri'}); 373: } 374: &do_registered_ssi(); 375: if ($Apache::lonxml::counter_changed) { &store_counter() } 376: return $finaloutput; 377: } 378: 379: sub htmlclean { 380: my ($raw,$full)=@_; 381: 382: my $tree = HTML::TreeBuilder->new; 383: $tree->ignore_unknown(0); 384: 385: $tree->parse($raw); 386: 387: my $output= $tree->as_HTML(undef,' '); 388: 389: $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis; 390: $output=~s/\<\/(br|hr|img|meta|allow)\>//gis; 391: unless ($full) { 392: $output=~s/\<[\/]*(body|head|html)\>//gis; 393: } 394: 395: $tree = $tree->delete; 396: 397: return $output; 398: } 399: 400: sub latex_special_symbols { 401: my ($string,$where)=@_; 402: if ($where eq 'header') { 403: $string =~ s/(\\|_|\^)/ /g; 404: $string =~ s/(\$|%|\{|\})/\\$1/g; 405: $string =~ s/_/ /g; 406: $string=&Apache::lonprintout::character_chart($string); 407: # any & or # leftover should be safe to just escape 408: $string=~s/([^\\])\&/$1\\\&/g; 409: $string=~s/([^\\])\#/$1\\\#/g; 410: } else { 411: $string=~s/([^\\])\%/$1\\\%/g; 412: $string=~s/([^\\])(\$|_)/$1\\$2/g; 413: $string=~s/\$\$/\$\\\$/g; 414: $string=~s/\#\#/\#\\\#/g; 415: $string=~s/([^\\])(\~|\^)/$1\\$2\\strut /g; 416: $string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less 417: $string=&Apache::lonprintout::character_chart($string); 418: # any & or # leftover should be safe to just escape 419: $string=~s/([^\\])\&/$1\\\&/g; 420: $string=~s/([^\\])\#/$1\\\#/g; 421: #single { or } How to escape? 422: } 423: return $string; 424: } 425: 426: sub inner_xmlparse { 427: my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_; 428: my $finaloutput = ''; 429: my $result; 430: my $token; 431: my $dontpop=0; 432: while ( $#$pars > -1 ) { 433: while ($token = $$pars['-1']->get_token) { 434: if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) { 435: if ($metamode<1) { 436: my $text=$token->[1]; 437: if ($token->[0] eq 'C' && $target eq 'tex') { 438: $text = ''; 439: # $text = '%'.$text."\n"; 440: } 441: $result.=$text; 442: } 443: } elsif (($token->[0] eq 'D')) { 444: if ($metamode<1 && $target eq 'web') { 445: my $text=$token->[1]; 446: $result.=$text; 447: } 448: } elsif ($token->[0] eq 'PI') { 449: if ($metamode<1 && $target eq 'web') { 450: $result=$token->[2]; 451: } 452: } elsif ($token->[0] eq 'S') { 453: # add tag to stack 454: push (@$stack,$token->[1]); 455: # add parameters list to another stack 456: push (@$parstack,&parstring($token)); 457: &increasedepth($token); 458: if ($Apache::lonxml::usestyle && 459: exists($$style_for_target{$token->[1]})) { 460: $Apache::lonxml::usestyle=0; 461: my $string=$$style_for_target{$token->[1]}. 462: '<LONCAPA_INTERNAL_TURN_STYLE_ON />'; 463: &Apache::lonxml::newparser($pars,\$string); 464: $Apache::lonxml::style_values=$$parstack[-1]; 465: $Apache::lonxml::style_end_values=$$parstack[-1]; 466: } else { 467: $result = &callsub("start_$token->[1]", $target, $token, $stack, 468: $parstack, $pars, $safeeval, $style_for_target); 469: } 470: } elsif ($token->[0] eq 'E') { 471: if ($Apache::lonxml::usestyle && 472: exists($$style_for_target{'/'."$token->[1]"})) { 473: $Apache::lonxml::usestyle=0; 474: my $string=$$style_for_target{'/'.$token->[1]}. 475: '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />'; 476: &Apache::lonxml::newparser($pars,\$string); 477: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values; 478: $Apache::lonxml::style_end_values=''; 479: $dontpop=1; 480: } else { 481: #clear out any tags that didn't end 482: while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) { 483: my $lasttag=$$stack[-1]; 484: if ($token->[1] =~ /^$lasttag$/i) { 485: &Apache::lonxml::warning('Using tag </'.$token->[1].'> on line '.$token->[3].' as end tag to <'.$$stack[-1].'>'); 486: last; 487: } else { 488: &Apache::lonxml::warning('Found tag </'.$token->[1].'> on line '.$token->[3].' when looking for </'.$$stack[-1].'> in file'); 489: &end_tag($stack,$parstack,$token); 490: } 491: } 492: $result = &callsub("end_$token->[1]", $target, $token, $stack, 493: $parstack, $pars,$safeeval, $style_for_target); 494: } 495: } else { 496: &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:"); 497: } 498: #evaluate variable refs in result 499: if ($Apache::lonxml::post_evaluate &&$result ne "") { 500: my $extras; 501: if (!$Apache::lonxml::usestyle) { 502: $extras=$Apache::lonxml::style_values; 503: } 504: if ( $#$parstack > -1 ) { 505: $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]); 506: } else { 507: $result= &Apache::run::evaluate($result,$safeeval,$extras); 508: } 509: } 510: $Apache::lonxml::post_evaluate=1; 511: 512: if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) { 513: #Style file definitions should be correct 514: if ($target eq 'tex' && ($Apache::lonxml::usestyle)) { 515: $result=&latex_special_symbols($result); 516: } 517: } 518: 519: # Encode any high ASCII characters 520: # if (!$Apache::lonxml::prevent_entity_encode) { 521: # $result=&HTML::Entities::encode($result,"\200-\377"); 522: # } 523: if ($Apache::lonxml::redirection) { 524: $Apache::lonxml::outputstack['-1'] .= $result; 525: } else { 526: $finaloutput.=$result; 527: } 528: $result = ''; 529: 530: if ($token->[0] eq 'E' && !$dontpop) { 531: &end_tag($stack,$parstack,$token); 532: } 533: $dontpop=0; 534: } 535: if ($#$pars > -1) { 536: pop @$pars; 537: pop @Apache::lonxml::pwd; 538: } 539: } 540: 541: # if ($target eq 'meta') { 542: # $finaloutput.=&endredirection; 543: # } 544: 545: 546: if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) { 547: $finaloutput=&afterburn($finaloutput); 548: } 549: return $finaloutput; 550: } 551: 552: sub callsub { 553: my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; 554: my $currentstring=''; 555: my $nodefault; 556: { 557: my $sub1; 558: no strict 'refs'; 559: my $tag=$token->[1]; 560: # get utterly rid of extended html tags 561: if ($tag=~/^x\-/i) { return ''; } 562: my $space=$Apache::lonxml::alltags{$tag}[-1]; 563: if (!$space) { 564: $tag=~tr/A-Z/a-z/; 565: $sub=~tr/A-Z/a-z/; 566: $space=$Apache::lonxml::alltags{$tag}[-1] 567: } 568: 569: my $deleted=0; 570: $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter); 571: if (($token->[0] eq 'S') && ($target eq 'modified')) { 572: $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack, 573: $parstack,$parser,$safeeval, 574: $style); 575: } 576: if (!$deleted) { 577: if ($space) { 578: #&Apache::lonxml::debug("Calling sub $sub in $space $metamode"); 579: $sub1="$space\:\:$sub"; 580: ($currentstring,$nodefault) = &$sub1($target,$token,$tagstack, 581: $parstack,$parser,$safeeval, 582: $style); 583: } else { 584: #&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode"); 585: if ($metamode <1) { 586: if (defined($token->[4]) && ($metamode < 1)) { 587: $currentstring = $token->[4]; 588: } else { 589: $currentstring = $token->[2]; 590: } 591: } 592: } 593: # &Apache::lonxml::debug("nodefalt:$nodefault:"); 594: if ($currentstring eq '' && $nodefault eq '') { 595: if ($target eq 'edit') { 596: #&Apache::lonxml::debug("doing default edit for $token->[1]"); 597: if ($token->[0] eq 'S') { 598: $currentstring = &Apache::edit::tag_start($target,$token); 599: } elsif ($token->[0] eq 'E') { 600: $currentstring = &Apache::edit::tag_end($target,$token); 601: } 602: } elsif ($target eq 'modified') { 603: if ($token->[0] eq 'S') { 604: $currentstring = $token->[4]; 605: $currentstring.=&Apache::edit::handle_insert(); 606: } elsif ($token->[0] eq 'E') { 607: $currentstring = $token->[2]; 608: $currentstring.=&Apache::edit::handle_insertafter($token->[1]); 609: } else { 610: $currentstring = $token->[2]; 611: } 612: } 613: } 614: } 615: use strict 'refs'; 616: } 617: return $currentstring; 618: } 619: 620: sub setup_globals { 621: my ($request,$target)=@_; 622: $Apache::lonxml::request=$request; 623: $Apache::lonxml::registered = 0; 624: $errorcount=0; 625: $warningcount=0; 626: $Apache::lonxml::default_homework_loaded=0; 627: $Apache::lonxml::usestyle=1; 628: &init_counter(); 629: @Apache::lonxml::pwd=(); 630: @Apache::lonxml::extlinks=(); 631: @Apache::lonxml::ssi_info=(); 632: $Apache::lonxml::post_evaluate=1; 633: $Apache::lonxml::warnings_error_header=''; 634: if ($target eq 'meta') { 635: $Apache::lonxml::redirection = 0; 636: $Apache::lonxml::metamode = 1; 637: $Apache::lonxml::evaluate = 1; 638: $Apache::lonxml::import = 0; 639: } elsif ($target eq 'answer') { 640: $Apache::lonxml::redirection = 0; 641: $Apache::lonxml::metamode = 1; 642: $Apache::lonxml::evaluate = 1; 643: $Apache::lonxml::import = 1; 644: } elsif ($target eq 'grade') { 645: &startredirection; 646: $Apache::lonxml::metamode = 0; 647: $Apache::lonxml::evaluate = 1; 648: $Apache::lonxml::import = 1; 649: } elsif ($target eq 'modified') { 650: $Apache::lonxml::redirection = 0; 651: $Apache::lonxml::metamode = 0; 652: $Apache::lonxml::evaluate = 0; 653: $Apache::lonxml::import = 0; 654: } elsif ($target eq 'edit') { 655: $Apache::lonxml::redirection = 0; 656: $Apache::lonxml::metamode = 0; 657: $Apache::lonxml::evaluate = 0; 658: $Apache::lonxml::import = 0; 659: } elsif ($target eq 'analyze') { 660: $Apache::lonxml::redirection = 0; 661: $Apache::lonxml::metamode = 0; 662: $Apache::lonxml::evaluate = 1; 663: $Apache::lonxml::import = 1; 664: } else { 665: $Apache::lonxml::redirection = 0; 666: $Apache::lonxml::metamode = 0; 667: $Apache::lonxml::evaluate = 1; 668: $Apache::lonxml::import = 1; 669: } 670: } 671: 672: sub init_safespace { 673: my ($target,$safeeval,$safehole,$safeinit) = @_; 674: $safeeval->permit("entereval"); 675: $safeeval->permit(":base_math"); 676: $safeeval->permit("sort"); 677: $safeeval->permit("time"); 678: $safeeval->deny(":base_io"); 679: $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse'); 680: $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart'); 681: $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT'); 682: 683: $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin'); 684: $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos'); 685: $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan'); 686: $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh'); 687: $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh'); 688: $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh'); 689: $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh'); 690: $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh'); 691: $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh'); 692: $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf'); 693: $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc'); 694: $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0'); 695: $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1'); 696: $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn'); 697: $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv'); 698: $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0'); 699: $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1'); 700: $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn'); 701: $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv'); 702: 703: $safehole->wrap(\&Math::Cephes::bdtr ,$safeeval,'&bdtr' ); 704: $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' ); 705: $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' ); 706: $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' ); 707: $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' ); 708: $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc'); 709: $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri'); 710: $safehole->wrap(\&Math::Cephes::fdtr ,$safeeval,'&fdtr' ); 711: $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' ); 712: $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' ); 713: $safehole->wrap(\&Math::Cephes::gdtr ,$safeeval,'&gdtr' ); 714: $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' ); 715: $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' ); 716: $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc'); 717: $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri'); 718: $safehole->wrap(\&Math::Cephes::ndtr ,$safeeval,'&ndtr' ); 719: $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' ); 720: $safehole->wrap(\&Math::Cephes::pdtr ,$safeeval,'&pdtr' ); 721: $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' ); 722: $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' ); 723: $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' ); 724: $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri'); 725: 726: # $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract'); 727: # $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd'); 728: # $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub'); 729: # $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul'); 730: # $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv'); 731: # $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid'); 732: 733: $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta'); 734: $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square'); 735: $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential'); 736: $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f'); 737: $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma'); 738: $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal'); 739: $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial'); 740: $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square'); 741: $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f'); 742: $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal'); 743: $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation'); 744: $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index'); 745: $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform'); 746: $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson'); 747: $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer'); 748: $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial'); 749: $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial'); 750: $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase'); 751: $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase'); 752: $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed'); 753: $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed'); 754: $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR'); 755: $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG'); 756: 757: #need to inspect this class of ops 758: # $safeeval->deny(":base_orig"); 759: $safeinit .= ';$external::target="'.$target.'";'; 760: my $rndseed; 761: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser(); 762: $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name); 763: $safeinit .= ';$external::randomseed='.$rndseed.';'; 764: &Apache::lonxml::debug("Setting rndseed to $rndseed"); 765: &Apache::run::run($safeinit,$safeeval); 766: 767: my $subroutine=<<'EVALUATESUB'; 768: sub __LC_INTERNAL_EVALUATE__ { 769: my ($__LC__a,$__LC__b,$__LC__c)=@_; 770: my $__LC__prefix; 771: while(1){ 772: { 773: use strict; 774: no strict "vars"; 775: if (eval(defined(eval($__LC__a.$__LC__b)))) { 776: return $__LC__prefix.eval($__LC__a.$__LC__b.$__LC__c); 777: } 778: } 779: $__LC__prefix.=substr($__LC__a,0,1,""); 780: if ($__LC__a!~/^(\$|&|\#)/) { last; } 781: } 782: return $__LC__prefix.$__LC__a.$__LC__b.$__LC__c; 783: } 784: EVALUATESUB 785: $safeeval->permit("require"); 786: $safeeval->reval($subroutine); 787: $safeeval->deny("require"); 788: } 789: 790: sub default_homework_load { 791: my ($safeeval)=@_; 792: &Apache::lonxml::debug('Loading default_homework'); 793: my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm'); 794: if ($default eq -1) { 795: &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>"); 796: } else { 797: &Apache::run::run($default,$safeeval); 798: $Apache::lonxml::default_homework_loaded=1; 799: } 800: } 801: 802: sub startredirection { 803: $Apache::lonxml::redirection++; 804: push (@Apache::lonxml::outputstack, ''); 805: } 806: 807: sub endredirection { 808: if (!$Apache::lonxml::redirection) { 809: &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller); 810: return ''; 811: } 812: $Apache::lonxml::redirection--; 813: pop @Apache::lonxml::outputstack; 814: } 815: 816: sub end_tag { 817: my ($tagstack,$parstack,$token)=@_; 818: pop(@$tagstack); 819: pop(@$parstack); 820: &decreasedepth($token); 821: } 822: 823: sub initdepth { 824: @Apache::lonxml::depthcounter=(); 825: $Apache::lonxml::depth=-1; 826: $Apache::lonxml::olddepth=-1; 827: } 828: 829: sub increasedepth { 830: my ($token) = @_; 831: $Apache::lonxml::depth++; 832: $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++; 833: if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) { 834: $Apache::lonxml::olddepth=$Apache::lonxml::depth; 835: } 836: my $curdepth=join('_',@Apache::lonxml::depthcounter); 837: &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"); 838: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n"; 839: } 840: 841: sub decreasedepth { 842: my ($token) = @_; 843: $Apache::lonxml::depth--; 844: if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) { 845: $#Apache::lonxml::depthcounter--; 846: $Apache::lonxml::olddepth=$Apache::lonxml::depth+1; 847: } 848: if ( $Apache::lonxml::depth < -1) { 849: &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file.")); 850: $Apache::lonxml::depth='-1'; 851: } 852: my $curdepth=join('_',@Apache::lonxml::depthcounter); 853: &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"); 854: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n"; 855: } 856: 857: sub get_all_text_unbalanced { 858: #there is a copy of this in lonpublisher.pm 859: my($tag,$pars)= @_; 860: my $token; 861: my $result=''; 862: $tag='<'.$tag.'>'; 863: while ($token = $$pars[-1]->get_token) { 864: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { 865: $result.=$token->[1]; 866: } elsif ($token->[0] eq 'PI') { 867: $result.=$token->[2]; 868: } elsif ($token->[0] eq 'S') { 869: $result.=$token->[4]; 870: } elsif ($token->[0] eq 'E') { 871: $result.=$token->[2]; 872: } 873: if ($result =~ /(.*)\Q$tag\E(.*)/s) { 874: &Apache::lonxml::debug('Got a winner with leftovers ::'.$2); 875: &Apache::lonxml::debug('Result is :'.$1); 876: $result=$1; 877: my $redo=$tag.$2; 878: &Apache::lonxml::newparser($pars,\$redo); 879: last; 880: } 881: } 882: return $result 883: } 884: 885: sub increment_counter { 886: my ($increment) = @_; 887: if (defined($increment) && $increment gt 0) { 888: $Apache::lonxml::counter+=$increment; 889: } else { 890: $Apache::lonxml::counter++; 891: } 892: $Apache::lonxml::counter_changed=1; 893: } 894: 895: sub init_counter { 896: if (defined($ENV{'form.counter'})) { 897: $Apache::lonxml::counter=$ENV{'form.counter'}; 898: $Apache::lonxml::counter_changed=0; 899: } else { 900: $Apache::lonxml::counter=1; 901: $Apache::lonxml::counter_changed=1; 902: } 903: } 904: 905: sub store_counter { 906: &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter)); 907: return ''; 908: } 909: 910: sub get_all_text { 911: my($tag,$pars,$style)= @_; 912: my $gotfullstack=1; 913: if (ref($pars) ne 'ARRAY') { 914: $gotfullstack=0; 915: $pars=[$pars]; 916: } 917: if (ref($style) ne 'HASH') { 918: $style={}; 919: } 920: my $depth=0; 921: my $token; 922: my $result=''; 923: if ( $tag =~ m:^/: ) { 924: my $tag=substr($tag,1); 925: #&Apache::lonxml::debug("have:$tag:"); 926: my $top_empty=0; 927: while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) { 928: while (($depth >=0) && ($token = $$pars[-1]->get_token)) { 929: #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd); 930: if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) { 931: $result.=$token->[1]; 932: } elsif ($token->[0] eq 'PI') { 933: $result.=$token->[2]; 934: } elsif ($token->[0] eq 'S') { 935: if ($token->[1] =~ /^$tag$/i) { $depth++; } 936: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; } 937: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; } 938: $result.=$token->[4]; 939: } elsif ($token->[0] eq 'E') { 940: if ( $token->[1] =~ /^$tag$/i) { $depth--; } 941: #skip sending back the last end tag 942: if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) { 943: my $string= 944: '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'. 945: $$style{'/'.$token->[1]}. 946: $token->[2]. 947: '<LONCAPA_INTERNAL_TURN_STYLE_ON />'; 948: &Apache::lonxml::newparser($pars,\$string); 949: #&Apache::lonxml::debug("reParsing $string"); 950: next; 951: } 952: if ($depth > -1) { 953: $result.=$token->[2]; 954: } else { 955: $$pars[-1]->unget_token($token); 956: } 957: } 958: } 959: if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; } 960: if (($depth >=0) && ($#$pars > 0) ) { 961: pop(@$pars); 962: pop(@Apache::lonxml::pwd); 963: } 964: } 965: if ($top_empty && $depth >= 0) { 966: #never found the end tag ran out of text, throw error send back blank 967: &error('Never found end tag for <'.$tag. 968: '> current string <pre>'. 969: &HTML::Entities::encode($result). 970: '</pre>'); 971: if ($gotfullstack) { 972: my $newstring='</'.$tag.'>'.$result; 973: &Apache::lonxml::newparser($pars,\$newstring); 974: } 975: $result=''; 976: } 977: } else { 978: while ($#$pars > -1) { 979: while ($token = $$pars[-1]->get_token) { 980: #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]"); 981: if (($token->[0] eq 'T')||($token->[0] eq 'C')|| 982: ($token->[0] eq 'D')) { 983: $result.=$token->[1]; 984: } elsif ($token->[0] eq 'PI') { 985: $result.=$token->[2]; 986: } elsif ($token->[0] eq 'S') { 987: if ( $token->[1] =~ /^$tag$/i) { 988: $$pars[-1]->unget_token($token); last; 989: } else { 990: $result.=$token->[4]; 991: } 992: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; } 993: if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; } 994: } elsif ($token->[0] eq 'E') { 995: $result.=$token->[2]; 996: } 997: } 998: if (($#$pars > 0) ) { 999: pop(@$pars); 1000: pop(@Apache::lonxml::pwd); 1001: } else { last; } 1002: } 1003: } 1004: #&Apache::lonxml::debug("Exit:$result:"); 1005: return $result 1006: } 1007: 1008: sub newparser { 1009: my ($parser,$contentref,$dir) = @_; 1010: push (@$parser,HTML::LCParser->new($contentref)); 1011: $$parser['-1']->xml_mode('1'); 1012: if ( $dir eq '' ) { 1013: push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]); 1014: } else { 1015: push (@Apache::lonxml::pwd, $dir); 1016: } 1017: } 1018: 1019: sub parstring { 1020: my ($token) = @_; 1021: my $temp=''; 1022: foreach (@{$token->[3]}) { 1023: unless ($_=~/\W/) { 1024: my $val=$token->[2]->{$_}; 1025: $val =~ s/([\%\@\\\"\'])/\\$1/g; 1026: #if ($val =~ m/^[\%\@]/) { $val="\\".$val; } 1027: $temp .= "my \$$_=\"$val\";"; 1028: } 1029: } 1030: return $temp; 1031: } 1032: 1033: sub writeallows { 1034: unless ($#extlinks>=0) { return; } 1035: my $thisurl='/res/'.&Apache::lonnet::declutter(shift); 1036: if ($ENV{'httpref.'.$thisurl}) { 1037: $thisurl=$ENV{'httpref.'.$thisurl}; 1038: } 1039: my $thisdir=$thisurl; 1040: $thisdir=~s/\/[^\/]+$//; 1041: my %httpref=(); 1042: foreach (@extlinks) { 1043: $httpref{'httpref.'. 1044: &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl; 1045: } 1046: @extlinks=(); 1047: &Apache::lonnet::appenv(%httpref); 1048: } 1049: 1050: sub register_ssi { 1051: my ($url,%form)=@_; 1052: push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form}); 1053: return ''; 1054: } 1055: 1056: sub do_registered_ssi { 1057: foreach my $info (@Apache::lonxml::ssi_info) { 1058: my %form=%{ $info->{'form'}}; 1059: my $url=$info->{'url'}; 1060: &Apache::lonnet::ssi($url,%form); 1061: } 1062: } 1063: # 1064: # Afterburner handles anchors, highlights and links 1065: # 1066: sub afterburn { 1067: my $result=shift; 1068: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, 1069: ['highlight','anchor','link']); 1070: if ($ENV{'form.highlight'}) { 1071: foreach (split(/\,/,$ENV{'form.highlight'})) { 1072: my $anchorname=$_; 1073: my $matchthis=$anchorname; 1074: $matchthis=~s/\_+/\\s\+/g; 1075: $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs; 1076: } 1077: } 1078: if ($ENV{'form.link'}) { 1079: foreach (split(/\,/,$ENV{'form.link'})) { 1080: my ($anchorname,$linkurl)=split(/\>/,$_); 1081: my $matchthis=$anchorname; 1082: $matchthis=~s/\_+/\\s\+/g; 1083: $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs; 1084: } 1085: } 1086: if ($ENV{'form.anchor'}) { 1087: my $anchorname=$ENV{'form.anchor'}; 1088: my $matchthis=$anchorname; 1089: $matchthis=~s/\_+/\\s\+/g; 1090: $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s; 1091: $result.=(<<"ENDSCRIPT"); 1092: <script type="text/javascript"> 1093: document.location.hash='$anchorname'; 1094: </script> 1095: ENDSCRIPT 1096: } 1097: return $result; 1098: } 1099: 1100: sub storefile { 1101: my ($file,$contents)=@_; 1102: &Apache::lonnet::correct_line_ends(\$contents); 1103: if (my $fh=Apache::File->new('>'.$file)) { 1104: print $fh $contents; 1105: $fh->close(); 1106: return 1; 1107: } else { 1108: &warning("Unable to save file $file"); 1109: return 0; 1110: } 1111: } 1112: 1113: sub createnewhtml { 1114: my $filecontents=(<<SIMPLECONTENT); 1115: <html> 1116: <head> 1117: <title> 1118: Title of Document Goes Here 1119: </title> 1120: </head> 1121: <body bgcolor="#FFFFFF"> 1122: 1123: Body of Document Goes Here 1124: 1125: </body> 1126: </html> 1127: SIMPLECONTENT 1128: return $filecontents; 1129: } 1130: 1131: sub createnewsty { 1132: my $filecontents=(<<SIMPLECONTENT); 1133: <definetag name=""> 1134: <render> 1135: <web></web> 1136: <tex></tex> 1137: </render> 1138: </definetag> 1139: SIMPLECONTENT 1140: return $filecontents; 1141: } 1142: 1143: 1144: sub inserteditinfo { 1145: my ($result,$filecontents,$filetype)=@_; 1146: $filecontents = &HTML::Entities::encode($filecontents); 1147: # my $editheader='<a href="#editsection">Edit below</a><hr />'; 1148: my $xml_help = ''; 1149: if ($filetype eq 'html') { 1150: $xml_help=Apache::loncommon::helpLatexCheatsheet(); 1151: } 1152: my $cleanbut = ''; 1153: if ($filetype eq 'html') { 1154: $cleanbut='<input type="submit" name="attemptclean" value="'. 1155: &mt('Save and then attempt to clean HTML').'" />'; 1156: } 1157: my $titledisplay=&display_title(); 1158: my %lt=&Apache::lonlocal::texthash('st' => 'Save this', 1159: 'vi' => 'View', 1160: 'ed' => 'Edit'); 1161: my $buttons=(<<BUTTONS); 1162: $cleanbut 1163: <input type="submit" name="savethisfile" accesskey="s" value="$lt{'st'}" /> 1164: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" /> 1165: BUTTONS 1166: my $editfooter=(<<ENDFOOTER); 1167: <hr /> 1168: <a name="editsection" /> 1169: <form method="post"> 1170: $xml_help 1171: <input type="hidden" name="editmode" value="$lt{'ed'}" /> 1172: $buttons<br /> 1173: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea> 1174: <br />$buttons 1175: <br /> 1176: </form> 1177: $titledisplay 1178: ENDFOOTER 1179: # $result=~s/(\<body[^\>]*\>)/$1$editheader/is; 1180: $result=~s/(\<\/body\>)/$editfooter/is; 1181: return $result; 1182: } 1183: 1184: sub get_target { 1185: my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}); 1186: if ( $ENV{'request.state'} eq 'published') { 1187: if ( defined($ENV{'form.grade_target'}) 1188: && ($viewgrades == 'F' )) { 1189: return ($ENV{'form.grade_target'}); 1190: } elsif (defined($ENV{'form.grade_target'})) { 1191: if (($ENV{'form.grade_target'} eq 'web') || 1192: ($ENV{'form.grade_target'} eq 'tex') ) { 1193: return $ENV{'form.grade_target'} 1194: } else { 1195: return 'web'; 1196: } 1197: } else { 1198: return 'web'; 1199: } 1200: } elsif ($ENV{'request.state'} eq 'construct') { 1201: if ( defined($ENV{'form.grade_target'})) { 1202: return ($ENV{'form.grade_target'}); 1203: } else { 1204: return 'web'; 1205: } 1206: } else { 1207: return 'web'; 1208: } 1209: } 1210: 1211: sub handler { 1212: my $request=shift; 1213: 1214: my $target=&get_target(); 1215: 1216: $Apache::lonxml::debug=$ENV{'user.debug'}; 1217: 1218: if ($ENV{'browser.mathml'}) { 1219: &Apache::loncommon::content_type($request,'text/xml'); 1220: } else { 1221: &Apache::loncommon::content_type($request,'text/html'); 1222: } 1223: &Apache::loncommon::no_cache($request); 1224: $request->send_http_header; 1225: 1226: return OK if $request->header_only; 1227: 1228: 1229: my $file=&Apache::lonnet::filelocation("",$request->uri); 1230: my $filetype; 1231: if ($file =~ /\.sty$/) { 1232: $filetype='sty'; 1233: } else { 1234: $filetype='html'; 1235: } 1236: # 1237: # Edit action? Save file. 1238: # 1239: unless ($ENV{'request.state'} eq 'published') { 1240: if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) { 1241: if (&storefile($file,$ENV{'form.filecont'})) { 1242: &Apache::lonxml::info("<font COLOR=\"#0000FF\">". 1243: &mt('Updated').": ". 1244: &Apache::lonlocal::locallocaltime(time). 1245: " </font>"); 1246: } 1247: } 1248: } 1249: my %mystyle; 1250: my $result = ''; 1251: my $filecontents=&Apache::lonnet::getfile($file); 1252: if ($filecontents eq -1) { 1253: my $bodytag=&Apache::loncommon::bodytag('File Error'); 1254: my $fnf=&mt('File not found'); 1255: $result=(<<ENDNOTFOUND); 1256: <html> 1257: <head> 1258: <title>$fnf</title> 1259: </head> 1260: $bodytag 1261: <b>$fnf: $file</b> 1262: </body> 1263: </html> 1264: ENDNOTFOUND 1265: $filecontents=''; 1266: if ($ENV{'request.state'} ne 'published') { 1267: if ($filetype eq 'sty') { 1268: $filecontents=&createnewsty(); 1269: } else { 1270: $filecontents=&createnewhtml(); 1271: } 1272: $ENV{'form.editmode'}='Edit'; #force edit mode 1273: } 1274: } else { 1275: unless ($ENV{'request.state'} eq 'published') { 1276: if ($ENV{'form.attemptclean'}) { 1277: $filecontents=&htmlclean($filecontents,1); 1278: } 1279: # 1280: # we are in construction space, see if edit mode forced 1281: &Apache::loncommon::get_unprocessed_cgi 1282: ($ENV{'QUERY_STRING'},['editmode']); 1283: } 1284: if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) { 1285: $result = &Apache::lonxml::xmlparse($request,$target,$filecontents, 1286: '',%mystyle); 1287: } 1288: } 1289: 1290: # 1291: # Edit action? Insert editing commands 1292: # 1293: unless ($ENV{'request.state'} eq 'published') { 1294: if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) { 1295: my $displayfile=$request->uri; 1296: $displayfile=~s/^\/[^\/]*//; 1297: $result='<html><body bgcolor="#FFFFFF">'. 1298: &Apache::lonxml::message_location().'<h3>'. 1299: $displayfile. 1300: '</h3></body></html>'; 1301: $result=&inserteditinfo($result,$filecontents,$filetype); 1302: } 1303: } 1304: if ($filetype eq 'html') { writeallows($request->uri); } 1305: 1306: 1307: &Apache::lonxml::add_messages(\$result); 1308: $request->print($result); 1309: 1310: return OK; 1311: } 1312: 1313: sub display_title { 1314: my $result; 1315: if ($ENV{'request.state'} eq 'construct') { 1316: my $title=&Apache::lonnet::gettitle(); 1317: if (!defined($title) || $title eq '') { 1318: $title = $ENV{'request.filename'}; 1319: $title = substr($title, rindex($title, '/') + 1); 1320: } 1321: $result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>"; 1322: } 1323: return $result; 1324: } 1325: 1326: sub debug { 1327: if ($Apache::lonxml::debug eq "1") { 1328: $|=1; 1329: my $request=$Apache::lonxml::request; 1330: if (!$request) { $request=Apache->request; } 1331: $request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n"); 1332: } 1333: } 1334: 1335: sub error { 1336: $errorcount++; 1337: my $request=$Apache::lonxml::request; 1338: if (!$request) { $request=Apache->request; } 1339: if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) { 1340: # If printing in construction space, put the error inside <pre></pre> 1341: push(@Apache::lonxml::error_messages, 1342: $Apache::lonxml::warnings_error_header. 1343: "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n"); 1344: $Apache::lonxml::warnings_error_header=''; 1345: } else { 1346: push(@Apache::lonxml::error_messages, 1347: "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />"); 1348: #notify author 1349: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_)); 1350: #notify course 1351: if ( $ENV{'request.course.id'} ) { 1352: my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1); 1353: my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'}); 1354: foreach (keys %users) { 1355: my ($user,$domain) = split(/:/, $_); 1356: &Apache::lonmsg::user_normal_msg($user,$domain, 1357: "Error [$declutter]",join('<br />',@_)); 1358: } 1359: } 1360: } 1361: } 1362: 1363: sub warning { 1364: $warningcount++; 1365: 1366: if ($ENV{'form.grade_target'} ne 'tex') { 1367: if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) { 1368: my $request=$Apache::lonxml::request; 1369: if (!$request) { $request=Apache->request; } 1370: push(@Apache::lonxml::warning_messages, 1371: $Apache::lonxml::warnings_error_header. 1372: "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n"); 1373: $Apache::lonxml::warnings_error_header=''; 1374: } 1375: } 1376: } 1377: 1378: sub info { 1379: if ($ENV{'form.grade_target'} ne 'tex' 1380: && $ENV{'request.state'} eq 'construct') { 1381: push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n"); 1382: } 1383: } 1384: 1385: sub message_location { 1386: return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__'; 1387: } 1388: 1389: sub add_messages { 1390: my ($msg)=@_; 1391: my $result=join(' ', 1392: @Apache::lonxml::info_messages, 1393: @Apache::lonxml::error_messages, 1394: @Apache::lonxml::warning_messages); 1395: undef(@Apache::lonxml::info_messages); 1396: undef(@Apache::lonxml::error_messages); 1397: undef(@Apache::lonxml::warning_messages); 1398: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/; 1399: $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g; 1400: } 1401: 1402: sub get_param { 1403: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_; 1404: if ( ! $context ) { $context = -1; } 1405: my $args =''; 1406: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; } 1407: if ( ! $Apache::lonxml::usestyle ) { 1408: $args=$Apache::lonxml::style_values.$args; 1409: } 1410: if ( ! $args ) { return undef; } 1411: if ( $case_insensitive ) { 1412: if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) { 1413: return &Apache::run::run("{$args;".'return $'.$param.'}', 1414: $safeeval); #' 1415: } else { 1416: return undef; 1417: } 1418: } else { 1419: if ( $args =~ /my \$\Q$param\E=\"/ ) { 1420: return &Apache::run::run("{$args;".'return $'.$param.'}', 1421: $safeeval); #' 1422: } else { 1423: return undef; 1424: } 1425: } 1426: } 1427: 1428: sub get_param_var { 1429: my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_; 1430: if ( ! $context ) { $context = -1; } 1431: my $args =''; 1432: if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; } 1433: if ( ! $Apache::lonxml::usestyle ) { 1434: $args=$Apache::lonxml::style_values.$args; 1435: } 1436: &Apache::lonxml::debug("Args are $args param is $param"); 1437: if ($case_insensitive) { 1438: if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) { 1439: return undef; 1440: } 1441: } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; } 1442: my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #' 1443: &Apache::lonxml::debug("first run is $value"); 1444: if ($value =~ /^[\$\@\%]\w+$/) { 1445: &Apache::lonxml::debug("doing second"); 1446: my @result=&Apache::run::run("return $value",$safeeval,1); 1447: if (!defined($result[0])) { 1448: return $value 1449: } else { 1450: if (wantarray) { return @result; } else { return $result[0]; } 1451: } 1452: } else { 1453: return $value; 1454: } 1455: } 1456: 1457: sub register_insert { 1458: my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab'); 1459: my $i; 1460: my $tagnum=0; 1461: my @order; 1462: for ($i=0;$i < $#data; $i++) { 1463: my $line = $data[$i]; 1464: if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; } 1465: if ( $line =~ /TABLE/ ) { last; } 1466: my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line); 1467: if ($tag) { 1468: $insertlist{"$tagnum.tag"} = $tag; 1469: $insertlist{"$tagnum.description"} = $descrip; 1470: $insertlist{"$tagnum.color"} = $color; 1471: $insertlist{"$tagnum.function"} = $function; 1472: if (!defined($show)) { $show='yes'; } 1473: $insertlist{"$tagnum.show"}= $show; 1474: $insertlist{"$tagnum.helpfile"} = $helpfile; 1475: $insertlist{"$tagnum.helpdesc"} = $helpdesc; 1476: $insertlist{"$tag.num"}=$tagnum; 1477: $tagnum++; 1478: } 1479: } 1480: $i++; #skipping TABLE line 1481: $tagnum = 0; 1482: for (;$i < $#data;$i++) { 1483: my $line = $data[$i]; 1484: my ($mnemonic,@which) = split(/ +/,$line); 1485: my $tag = $insertlist{"$tagnum.tag"}; 1486: for (my $j=0;$j <=$#which;$j++) { 1487: if ( $which[$j] eq 'Y' ) { 1488: if ($insertlist{"$j.show"} ne 'no') { 1489: push(@{ $insertlist{"$tag.which"} },$j); 1490: } 1491: } 1492: } 1493: $tagnum++; 1494: } 1495: } 1496: 1497: sub description { 1498: my ($token)=@_; 1499: my $tagnum; 1500: my $tag=$token->[1]; 1501: foreach my $namespace (reverse @Apache::lonxml::namespace) { 1502: my $testtag=$namespace.'::'.$tag; 1503: $tagnum=$insertlist{"$testtag.num"}; 1504: if (defined($tagnum)) { last; } 1505: } 1506: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; } 1507: return $insertlist{$tagnum.'.description'}; 1508: } 1509: 1510: # Returns a list containing the help file, and the description 1511: sub helpinfo { 1512: my ($token)=@_; 1513: my $tagnum; 1514: my $tag=$token->[1]; 1515: foreach my $namespace (reverse @Apache::lonxml::namespace) { 1516: my $testtag=$namespace.'::'.$tag; 1517: $tagnum=$insertlist{"$testtag.num"}; 1518: if (defined($tagnum)) { last; } 1519: } 1520: if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; } 1521: return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'}); 1522: } 1523: 1524: # ----------------------------------------------------------------- whichuser 1525: # returns a list of $symb, $courseid, $domain, $name that is correct for 1526: # calls to lonnet functions for this setup. 1527: # - looks for form.grade_ parameters 1528: sub whichuser { 1529: my ($passedsymb)=@_; 1530: my ($symb,$courseid,$domain,$name,$publicuser); 1531: if (defined($ENV{'form.grade_symb'})) { 1532: my $tmp_courseid=$ENV{'form.grade_courseid'}; 1533: my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid); 1534: if ($allowed) { 1535: $symb=$ENV{'form.grade_symb'}; 1536: $courseid=$ENV{'form.grade_courseid'}; 1537: $domain=$ENV{'form.grade_domain'}; 1538: $name=$ENV{'form.grade_username'}; 1539: } 1540: } else { 1541: if (!$passedsymb) { 1542: $symb=&Apache::lonnet::symbread(); 1543: } else { 1544: $symb=$passedsymb; 1545: } 1546: $courseid=$ENV{'request.course.id'}; 1547: $domain=$ENV{'user.domain'}; 1548: $name=$ENV{'user.name'}; 1549: if ($name eq 'public' && $domain eq 'public') { 1550: if (!defined($ENV{'form.username'})) { 1551: $ENV{'form.username'}.=time.rand(10000000); 1552: } 1553: $name.=$ENV{'form.username'}; 1554: } 1555: } 1556: return ($symb,$courseid,$domain,$name,$publicuser); 1557: } 1558: 1559: 1; 1560: __END__ 1561: 1562: