loncom/xml/londefdef.pm - view

File: [LON-CAPA] / loncom / xml / londefdef.pm
Revision 1.301: download - view: text, annotated - select for diffs
Tue Dec 6 22:37:00 2005 UTC (18 years, 6 months ago) by foxr
Branches: MAIN
CVS tags: HEAD

Tables that were nested in cells of tables were not being 'consumed' when included
into the outer table and hence the wrong table was getting substituted into the
output if multiple tables were nested in a single table.

1: # The LearningOnline Network with CAPA 2: # Tags Default Definition Module 3: # 4: # $Id: londefdef.pm,v 1.301 2005/12/06 22:37:00 foxr Exp $ 5: # 6: # 7: # Copyright Michigan State University Board of Trustees 8: # 9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 10: # 11: # LON-CAPA is free software; you can redistribute it and/or modify 12: # it under the terms of the GNU General Public License as published by 13: # the Free Software Foundation; either version 2 of the License, or 14: # (at your option) any later version. 15: # 16: # LON-CAPA is distributed in the hope that it will be useful, 17: # but WITHOUT ANY WARRANTY; without even the implied warranty of 18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19: # GNU General Public License for more details. 20: # 21: # You should have received a copy of the GNU General Public License 22: # along with LON-CAPA; if not, write to the Free Software 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 24: # 25: # /home/httpd/html/adm/gpl.txt 26: # 27: # http://www.lon-capa.org/ 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: 40: package Apache::londefdef; 41: 42: use Apache::lonnet; 43: use strict; 44: use Apache::lonxml; 45: use Apache::File(); 46: use Image::Magick; 47: use Apache::lonmenu(); 48: use Apache::lonmeta(); 49: use Apache::Constants qw(:common); 50: use File::Basename; 51: use Data::Dumper; 52: 53: BEGIN { 54: 55: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput')); 56: 57: } 58: 59: # 60: # Dumps all elements of the table structure. 61: # Need this 'cause evidently when given an array, Data::Dumper only seems 62: # to dump element 0. 63: # 64: sub debug_dump_table { 65: my $lastrow = $#Apache::londefdef::table; 66: &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow"); 67: my $row; 68: for ($row =0; $row <= $lastrow; $row++ ) { 69: my $text = Dumper($Apache::londefdef::table[$row]); 70: &Apache::lonnet::logthis("table [ $row ]".$text); 71: 72: } 73: } 74: sub initialize_londefdef { 75: $Apache::londefdef::TD_redirection=0; 76: @Apache::londefdef::table = (); 77: $Apache::londefdef::select=0; 78: undef(@Apache::londefdef::description); 79: @Apache::londefdef::DD=(0); 80: @Apache::londefdef::DT=(0); 81: @Apache::londefdef::seenDT=(0); 82: $Apache::londefdef::list_index=0; 83: } 84: 85: #======================= TAG SUBROUTINES ===================== 86: #-- <output> 87: sub start_output { 88: my ($target) = @_; 89: if ($target eq 'meta') { $Apache::lonxml::metamode--; } 90: return ''; 91: } 92: sub end_output { 93: my ($target) = @_; 94: if ($target eq 'meta') { $Apache::lonxml::metamode++; } 95: return ''; 96: } 97: #-- <m> tag 98: sub start_m { 99: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_; 100: my $currentstring = ''; 101: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser); 102: if ($target eq 'web' || $target eq 'analyze') { 103: &Apache::lonxml::debug("M is starting with:$inside:"); 104: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval); 105: if ($eval eq 'on') { 106: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]); 107: #&Apache::lonxml::debug("M is evaulated to:$inside:"); 108: } 109: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval); 110: $currentstring = &Apache::lontexconvert::converted(\$inside,$display); 111: if ($Apache::lontexconvert::errorstring) { 112: &Apache::lonxml::warning("tth error: ". 113: $Apache::lontexconvert::errorstring); 114: $Apache::lontexconvert::errorstring=''; 115: } 116: #&Apache::lonxml::debug("M is ends with:$currentstring:"); 117: $Apache::lonxml::post_evaluate=0; 118: } elsif ($target eq 'tex') { 119: $currentstring = $inside; 120: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval); 121: if ($eval eq 'on') { 122: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]); 123: } 124: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';} 125: # detect simple math mode entry exits, and convert them 126: # to use \ensuremath 127: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) { 128: $currentstring=~s/^(\s*)\$/$1/; 129: $currentstring=~s/\$(\s*)$/$1/; 130: $currentstring='\ensuremath{'.$currentstring.'}'; 131: } 132: $Apache::lonxml::post_evaluate=0; 133: } 134: return $currentstring; 135: } 136: 137: sub end_m { 138: my ($target,$token) = @_; 139: my $currentstring = ''; 140: if ($target eq 'tex') { 141: $currentstring = ""; 142: } 143: return $currentstring; 144: } 145: 146: sub start_tthoption { 147: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_; 148: my $result; 149: if ($target eq 'web') { 150: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser, 151: $style); 152: $inside=~s/^\s*//; 153: if ($env{'browser.mathml'}) { 154: &tth::ttmoptions($inside); 155: } else { 156: &tth::tthoptions($inside); 157: } 158: } 159: return $result; 160: } 161: 162: sub end_tthoption { 163: my ($target,$token) = @_; 164: my $result; 165: return $result; 166: } 167: 168: #-- <html> tag (end tag optional) 169: sub start_html { 170: my ($target,$token) = @_; 171: my $currentstring = ''; 172: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'}; 173: &Apache::lontexconvert::init_tth(); 174: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) { 175: $currentstring = &Apache::lonxml::xmlbegin(); 176: } elsif ($target eq 'tex') { 177: $currentstring .= '\documentclass[letterpaper]{article}'; 178: if (($env{'form.latex_type'}=~'batchmode') || 179: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';} 180: $currentstring .= '\newcommand{\keephidden}[1]{}'. 181: '\renewcommand{\deg}{$^{\circ}$}'. 182: '\usepackage{longtable}'. 183: '\usepackage{textcomp}'. 184: '\usepackage{makeidx}'. 185: '\usepackage[dvips]{graphicx}'. 186: '\usepackage{wrapfig}'. 187: '\usepackage{picins}'. 188: '\usepackage{epsfig}'. 189: '\usepackage{calc}'. 190: '\usepackage{amsmath}'. 191: '\usepackage{amssymb}'. 192: '\usepackage{amsfonts}'. 193: '\usepackage{amsthm}'. 194: '\usepackage{amscd}'. 195: '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'. 196: '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}'; 197: } 198: return $currentstring; 199: } 200: 201: sub end_html { 202: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 203: my $currentstring = ''; 204: if ($target eq 'web') { 205: $currentstring = '</html>'; 206: } 207: return $currentstring; 208: } 209: 210: #-- <head> tag (end tag optional) 211: sub start_head { 212: my ($target,$token) = @_; 213: my $currentstring = ''; 214: if ($target eq 'web') { 215: $currentstring = $token->[4].&Apache::lonxml::fontsettings(); 216: } 217: return $currentstring; 218: } 219: 220: sub end_head { 221: my ($target,$token) = @_; 222: my $currentstring = ''; 223: if ($target eq 'web' && $env{'request.state'} eq 'published') { 224: $currentstring = &Apache::lonmenu::registerurl(undef,$target). 225: $token->[2]; 226: } 227: return $currentstring; 228: } 229: 230: #-- <map> tag (end tag required) 231: sub start_map { 232: my ($target,$token) = @_; 233: my $currentstring = ''; 234: if ($target eq 'web') { 235: $currentstring = $token->[4]; 236: } 237: return $currentstring; 238: } 239: 240: sub end_map { 241: my ($target,$token) = @_; 242: my $currentstring = ''; 243: if ($target eq 'web') { 244: $currentstring = $token->[2]; 245: } 246: return $currentstring; 247: } 248: 249: #-- <select> tag (end tag required) 250: sub start_select { 251: my ($target,$token) = @_; 252: my $currentstring = ''; 253: if ($target eq 'web') { 254: $currentstring = $token->[4]; 255: } elsif ($target eq 'tex') { 256: $Apache::londefdef::select=0; 257: } 258: return $currentstring; 259: } 260: 261: sub end_select { 262: my ($target,$token) = @_; 263: my $currentstring = ''; 264: if ($target eq 'web') { 265: $currentstring = $token->[2]; 266: } 267: return $currentstring; 268: } 269: 270: #-- <option> tag (end tag optional) 271: sub start_option { 272: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 273: my $currentstring = ''; 274: if ($target eq 'web') { 275: $currentstring = $token->[4]; 276: } elsif ($target eq 'tex') { 277: $Apache::londefdef::select++; 278: if ($Apache::londefdef::select == 1) { 279: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{'; 280: } else { 281: $currentstring='\keephidden{'; 282: } 283: } 284: return $currentstring; 285: } 286: 287: sub end_option { 288: my ($target,$token) = @_; 289: my $currentstring = ''; 290: if ($target eq 'web') { 291: $currentstring = $token->[2]; 292: } elsif ($target eq 'tex') { 293: $currentstring='}'; 294: } 295: return $currentstring; 296: } 297: 298: #-- <input> tag (end tag forbidden) 299: sub start_input { 300: my ($target,$token) = @_; 301: my $currentstring = ''; 302: if ($target eq 'web') { 303: $currentstring = $token->[4]; 304: } 305: return $currentstring; 306: } 307: 308: sub end_input { 309: my ($target,$token) = @_; 310: my $currentstring = ''; 311: if ($target eq 'web') { 312: $currentstring = $token->[2]; 313: } 314: return $currentstring; 315: } 316: 317: #-- <textarea> tag (end tag required) 318: sub start_textarea { 319: my ($target,$token) = @_; 320: my $currentstring = ''; 321: if ($target eq 'web') { 322: $currentstring = $token->[4]; 323: } 324: return $currentstring; 325: } 326: 327: sub end_textarea { 328: my ($target,$token) = @_; 329: my $currentstring = ''; 330: if ($target eq 'web') { 331: $currentstring = $token->[2]; 332: } 333: return $currentstring; 334: } 335: 336: #-- <form> tag (end tag required) 337: sub start_form { 338: my ($target,$token) = @_; 339: my $currentstring = ''; 340: if ($target eq 'web') { 341: $currentstring = $token->[4]; 342: } 343: return $currentstring; 344: } 345: 346: sub end_form { 347: my ($target,$token) = @_; 348: my $currentstring = ''; 349: if ($target eq 'web') { 350: $currentstring = $token->[2]; 351: } 352: return $currentstring; 353: } 354: 355: #-- <title> tag (end tag required) 356: sub start_title { 357: my ($target,$token) = @_; 358: my $currentstring = ''; 359: if ($target eq 'web') { 360: $currentstring = $token->[4]; 361: } elsif ($target eq 'tex') { 362: $currentstring .= '\keephidden{Title of the document: ' 363: } 364: if ($target eq 'meta') { 365: $currentstring='<title>'; 366: &start_output($target); 367: } 368: return $currentstring; 369: } 370: 371: sub end_title { 372: my ($target,$token) = @_; 373: my $currentstring = ''; 374: if ($target eq 'web') { 375: $currentstring = $token->[2]; 376: } elsif ($target eq 'tex') { 377: $currentstring .= '}'; 378: } 379: if ($target eq 'meta') { 380: &end_output($target); 381: $currentstring='</title>'; 382: } 383: return $currentstring; 384: } 385: 386: #-- <meta> tag (end tag forbidden) 387: sub start_meta { 388: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_; 389: my $currentstring = ''; 390: if ($target eq 'web') { 391: my $args=''; 392: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; } 393: if ($args eq '') { 394: &Apache::lonxml::get_all_text("/meta",$parser,$style); 395: } else { 396: $currentstring = $token->[4]; 397: } 398: } elsif ($target eq 'meta') { 399: unless (&Apache::lonxml::get_param 400: ('http-equiv',$parstack,$safeeval,undef,1)) { 401: my $name=$token->[2]->{'name'}; 402: $name=~tr/A-Z/a-z/; 403: $name=~s/\s/\_/gs; 404: $name=~s/\W//gs; 405: if ($name) { 406: $currentstring='<'.$name; 407: my $display=&Apache::lonxml::get_param 408: ('display',$parstack,$safeeval,undef,1); 409: if ($display) { 410: $display=~s/\"/\'/g; 411: $currentstring.=' display="'.$display.'"'; 412: } 413: $currentstring.='>'. 414: &Apache::lonxml::get_param 415: ('content',$parstack,$safeeval,undef,1). 416: '</'.$name.'>'; 417: } 418: my $display=&Apache::lonxml::get_param 419: ('display',$parstack,$safeeval,undef,1); 420: if ($display) { 421: $display=&HTML::Entities::encode($display,'<>&"'); 422: $currentstring.='<'.$name.'.display>'.$display. 423: '</'.$name.'.display>'; 424: } 425: } 426: } elsif ($target eq 'tex') { 427: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval); 428: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval); 429: if ((not defined $content) && (not defined $name)) { 430: &Apache::lonxml::startredirection(); 431: } 432: } 433: return $currentstring; 434: } 435: 436: sub end_meta { 437: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 438: my $currentstring = ''; 439: if ($target eq 'web') { 440: my $args=''; 441: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; } 442: if ($args ne '') { 443: $currentstring = $token->[4]; 444: } 445: } elsif ($target eq 'tex') { 446: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval); 447: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval); 448: if ((not defined $content) && (not defined $name)) { 449: &Apache::lonxml::endredirection(); 450: } 451: } 452: return $currentstring; 453: } 454: 455: # accessrule 456: sub start_accessrule { 457: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_; 458: my $currentstring = ''; 459: my $eff=&Apache::lonxml::get_param 460: ('effect',$parstack,$safeeval,undef,1); 461: my $realm=&Apache::lonxml::get_param 462: ('realm',$parstack,$safeeval,undef,1); 463: my $role=&Apache::lonxml::get_param 464: ('role',$parstack,$safeeval,undef,1); 465: $realm=~s/\s+//g; 466: $realm=~s/\//\_/g; 467: $realm=~s/^\_//; 468: $realm=~s/\W/\;/g; 469: $role=~s/\s+//g; 470: $role=~s/\//\_/g; 471: $role=~s/\W/\;/g; 472: if ($target eq 'web') { 473: my $args=''; 474: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; } 475: if ($args eq '') { 476: &Apache::lonxml::get_all_text("/accessrule",$parser,$style); 477: } else { 478: $currentstring = $token->[4]; 479: } 480: } 481: if ($target eq 'meta') { 482: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>'; 483: } 484: return $currentstring; 485: } 486: 487: sub end_accessrule { 488: my ($target,$token,$tagstack,$parstack,$parser) = @_; 489: my $currentstring = ''; 490: if ($target eq 'web') { 491: my $args=''; 492: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; } 493: if ($args ne '') { 494: $currentstring = $token->[4]; 495: } 496: } 497: return $currentstring; 498: } 499: 500: #-- <body> tag (end tag required) 501: sub start_body { 502: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 503: my $currentstring = ''; 504: 505: if ($target eq 'web') { 506: if ($Apache::lonhomework::parsing_a_problem) { 507: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems."); 508: return ''; 509: } 510: if (!$Apache::lonxml::registered && 511: $env{'request.state'} eq 'published') { 512: $currentstring.='<head>'. 513: &Apache::lonmenu::registerurl(undef,$target).'</head>'; 514: } 515: # Accessibility 516: if ($env{'browser.imagesuppress'} eq 'on') { 517: delete($token->[2]->{'background'}); 518: } 519: if ($env{'browser.fontenhance'} eq 'on') { 520: my $style=''; 521: foreach my $key (keys(%{$token->[2]})) { 522: if ($key =~ /^style$/i) { 523: $style.=$token->[2]->{$key}.';'; 524: delete($token->[2]->{$key}); 525: } 526: } 527: $token->[2]->{'style'}=$style.'; font-size: x-large;'; 528: } 529: if ($env{'browser.blackwhite'} eq 'on') { 530: delete($token->[2]->{'font'}); 531: delete($token->[2]->{'link'}); 532: delete($token->[2]->{'alink'}); 533: delete($token->[2]->{'vlink'}); 534: delete($token->[2]->{'bgcolor'}); 535: delete($token->[2]->{'background'}); 536: } 537: # Overload loads 538: my $onLoad=''; 539: foreach my $key (keys(%{$token->[2]})) { 540: if ($key =~ /^onload$/i) { 541: $onLoad.=$token->[2]->{$key}.';'; 542: delete($token->[2]->{$key}); 543: } 544: } 545: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad; 546: my $onUnload=''; 547: foreach my $key (keys(%{$token->[2]})) { 548: if ($key =~ /^onunload$/i) { 549: $onUnload.=$token->[2]->{$key}.';'; 550: delete($token->[2]->{$key}); 551: } 552: } 553: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents(). 554: ';'.$onUnload; 555: 556: $currentstring .= '<'.$token->[1]; 557: foreach (keys %{$token->[2]}) { 558: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"'; 559: } 560: $currentstring.='>'; 561: &Apache::lontexconvert::jsMath_reset(); 562: if ($env{'environment.texengine'} eq 'jsMath') { 563: $currentstring.=&Apache::lontexconvert::jsMath_header(); 564: } 565: if ($env{'request.state'} ne 'published') { 566: if ($env{'environment.remote'} eq 'off') { 567: $currentstring.= 568: &Apache::lonmenu::constspaceform(). 569: &Apache::lonmenu::menubuttons(1,'web',1); 570: } 571: $currentstring.=(<<EDITBUTTON); 572: <form method="post"> 573: <input type="submit" name="editmode" accesskey="e" value="Edit" /> 574: </form> 575: EDITBUTTON 576: } else { 577: $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1); 578: } 579: $currentstring.=&Apache::lonxml::message_location(); 580: } elsif ($target eq 'tex') { 581: $currentstring = '\begin{document}'; 582: } 583: return $currentstring; 584: } 585: 586: sub end_body { 587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 588: my $currentstring = &end_p(); # Close off unclosed <p> 589: if ($target eq 'web') { 590: $currentstring .= &Apache::lonxml::xmlend($target,$parser); 591: } elsif ($target eq 'tex') { 592: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}'; 593: } 594: return $currentstring; 595: } 596: 597: #-- <center> tag (end tag required) 598: sub start_center { 599: my ($target,$token) = @_; 600: my $currentstring = &end_p(); # Close off any prior para. 601: if ($target eq 'web') { 602: $currentstring .= $token->[4]; 603: } elsif ($target eq 'tex') { 604: $currentstring .= '\begin{center}'; 605: } 606: return $currentstring; 607: } 608: 609: sub end_center { 610: my ($target,$token) = @_; 611: my $currentstring = ''; 612: if ($target eq 'web') { 613: $currentstring = $token->[2]; 614: } elsif ($target eq 'tex') { 615: $currentstring = '\end{center}'; 616: } 617: return $currentstring; 618: } 619: 620: #-- <b> tag (end tag required) 621: # NOTE: In TeX mode disables internal <p> 622: sub start_b { 623: my ($target,$token) = @_; 624: my $currentstring = ''; 625: if ($target eq 'web') { 626: $currentstring = $token->[4]; 627: } elsif ($target eq 'tex') { 628: &disable_para(); 629: $currentstring .= '\textbf{'; 630: } 631: return $currentstring; 632: } 633: 634: sub end_b { 635: my ($target,$token) = @_; 636: my $currentstring = ''; 637: if ($target eq 'web') { 638: $currentstring = $token->[2]; 639: } elsif ($target eq 'tex') { 640: &enable_para(); 641: $currentstring = '}'; 642: } 643: return $currentstring; 644: } 645: 646: #-- <strong> tag (end tag required) 647: # NOTE: in TeX mode disables internal <p> 648: sub start_strong { 649: my ($target,$token) = @_; 650: my $currentstring = ''; 651: if ($target eq 'web') { 652: $currentstring = $token->[4]; 653: } elsif ($target eq 'tex') { 654: &disable_para(); 655: $currentstring = '\textbf{'; 656: } 657: return $currentstring; 658: } 659: 660: sub end_strong { 661: my ($target,$token) = @_; 662: my $currentstring = ''; 663: if ($target eq 'web') { 664: $currentstring = $token->[2]; 665: } elsif ($target eq 'tex') { 666: &enable_para(); 667: $currentstring = '}'; 668: } 669: return $currentstring; 670: } 671: 672: #-- <h1> tag (end tag required) 673: sub start_h1 { 674: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 675: my $currentstring = &end_p(); # Close off any prior para. 676: if ($target eq 'web') { 677: $currentstring .= $token->[4]; 678: } elsif ($target eq 'tex') { 679: my $pre; 680: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1)); 681: if ($align eq 'center') { 682: $pre='\begin{center}'; 683: } elsif ($align eq 'left') { 684: $pre='\rlap{'; 685: } elsif ($align eq 'right') { 686: $pre=' \hfill \llap{'; 687: } 688: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); 689: if (not defined $TeXsize) {$TeXsize="large";} 690: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 691: } elsif ($target eq 'meta') { 692: $currentstring.='<subject>'; 693: &start_output($target); 694: } 695: return $currentstring; 696: } 697: 698: sub end_h1 { 699: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 700: my $currentstring = ''; 701: if ($target eq 'web') { 702: $currentstring .= $token->[2]; 703: } elsif ($target eq 'tex') { 704: my $post='\vskip 0 mm '; 705: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 706: if ($align eq 'center') { 707: $post='\end{center}'; 708: } elsif ($align eq 'left') { 709: $post='} \hfill'.'\vskip 0 mm '; 710: } elsif ($align eq 'right') { 711: $post='}'.'\vskip 0 mm '; 712: } 713: $currentstring .= '}}'.$post; 714: } elsif ($target eq 'meta') { 715: &end_output($target); 716: $currentstring='</subject>'; 717: } 718: return $currentstring; 719: } 720: 721: #-- <h2> tag 722: sub start_h2 { 723: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 724: my $currentstring = &end_p(); # Close off any prior para. 725: if ($target eq 'web') { 726: $currentstring .= $token->[4]; 727: } elsif ($target eq 'tex') { 728: my $pre; 729: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 730: if ($align eq 'center') { 731: $pre='\begin{center}'; 732: } elsif ($align eq 'left') { 733: $pre='\rlap{'; 734: } elsif ($align eq 'right') { 735: $pre=' \hfill \llap{'; 736: } 737: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); 738: if (not defined $TeXsize) {$TeXsize="large";} 739: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 740: } 741: return $currentstring; 742: } 743: 744: sub end_h2 { 745: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 746: my $currentstring = ''; 747: if ($target eq 'web') { 748: $currentstring .= $token->[2]; 749: } elsif ($target eq 'tex') { 750: my $post='\vskip 0 mm '; 751: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 752: if ($align eq 'center') { 753: $post='\end{center}'; 754: } elsif ($align eq 'left') { 755: $post='} \hfill'.'\vskip 0 mm '; 756: } elsif ($align eq 'right') { 757: $post='}'.'\vskip 0 mm '; 758: } 759: $currentstring .= '}}'.$post; 760: } 761: return $currentstring; 762: } 763: 764: #-- <h3> tag 765: sub start_h3 { 766: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 767: my $currentstring = &end_p(); # Close off any prior para. 768: if ($target eq 'web') { 769: $currentstring .= $token->[4]; 770: } elsif ($target eq 'tex') { 771: my $pre; 772: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 773: if ($align eq 'center') { 774: $pre='\begin{center}'; 775: } elsif ($align eq 'left') { 776: $pre='\rlap{'; 777: } elsif ($align eq 'right') { 778: $pre=' \hfill \llap{'; 779: } 780: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); 781: if (not defined $TeXsize) {$TeXsize="large";} 782: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 783: } 784: return $currentstring; 785: } 786: 787: sub end_h3 { 788: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 789: my $currentstring = ''; 790: if ($target eq 'web') { 791: $currentstring .= $token->[2]; 792: } elsif ($target eq 'tex') { 793: my $post='\vskip 0 mm '; 794: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 795: if ($align eq 'center') { 796: $post='\end{center}'; 797: } elsif ($align eq 'left') { 798: $post='} \hfill'.'\vskip 0 mm '; 799: } elsif ($align eq 'right') { 800: $post='}'.'\vskip 0 mm '; 801: } 802: $currentstring .= '}}'.$post; 803: } 804: return $currentstring; 805: } 806: 807: #-- <h4> tag 808: sub start_h4 { 809: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 810: my $currentstring = &end_p(); # Close off any prior para. 811: if ($target eq 'web') { 812: $currentstring .= $token->[4]; 813: } elsif ($target eq 'tex') { 814: my $pre; 815: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 816: if ($align eq 'center') { 817: $pre='\begin{center}'; 818: } elsif ($align eq 'left') { 819: $pre='\rlap{'; 820: } elsif ($align eq 'right') { 821: $pre=' \hfill \llap{'; 822: } 823: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); 824: if (not defined $TeXsize) {$TeXsize="large";} 825: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 826: } 827: return $currentstring; 828: } 829: 830: sub end_h4 { 831: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 832: my $currentstring = ''; 833: if ($target eq 'web') { 834: $currentstring .= $token->[2]; 835: } elsif ($target eq 'tex') { 836: my $post='\vskip 0 mm '; 837: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 838: if ($align eq 'center') { 839: $post='\end{center}'; 840: } elsif ($align eq 'left') { 841: $post='} \hfill'.'\vskip 0 mm '; 842: } elsif ($align eq 'right') { 843: $post='}'.'\vskip 0 mm '; 844: } 845: $currentstring .= '}}'.$post; 846: } 847: return $currentstring; 848: } 849: 850: #-- <h5> tag 851: sub start_h5 { 852: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 853: my $currentstring = &end_p(); # Close off any prior paras. 854: if ($target eq 'web') { 855: $currentstring .= $token->[4]; 856: } elsif ($target eq 'tex') { 857: my $pre; 858: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 859: if ($align eq 'center') { 860: $pre='\begin{center}'; 861: } elsif ($align eq 'left') { 862: $pre='\rlap{'; 863: } elsif ($align eq 'right') { 864: $pre=' \hfill \llap{'; 865: } 866: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); 867: if (not defined $TeXsize) {$TeXsize="large";} 868: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 869: } 870: return $currentstring; 871: } 872: 873: sub end_h5 { 874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 875: my $currentstring = ''; 876: if ($target eq 'web') { 877: $currentstring .= $token->[2]; 878: } elsif ($target eq 'tex') { 879: my $post='\vskip 0 mm '; 880: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 881: if ($align eq 'center') { 882: $post='\end{center}'; 883: } elsif ($align eq 'left') { 884: $post='} \hfill'.'\vskip 0 mm '; 885: } elsif ($align eq 'right') { 886: $post='}'.'\vskip 0 mm '; 887: } 888: $currentstring .= '}}'.$post; 889: } 890: return $currentstring; 891: } 892: 893: #-- <h6> tag 894: sub start_h6 { 895: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 896: my $currentstring = &end_p(); # Close off any prior paras. 897: if ($target eq 'web') { 898: $currentstring .= $token->[4]; 899: } elsif ($target eq 'tex') { 900: my $pre; 901: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 902: if ($align eq 'center') { 903: $pre='\begin{center}'; 904: } elsif ($align eq 'left') { 905: $pre='\rlap{'; 906: } elsif ($align eq 'right') { 907: $pre=' \hfill \llap{'; 908: } 909: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0); 910: if (not defined $TeXsize) {$TeXsize="large";} 911: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{'; 912: } 913: return $currentstring; 914: } 915: 916: sub end_h6 { 917: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 918: my $currentstring = ''; 919: if ($target eq 'web') { 920: $currentstring .= $token->[2]; 921: } elsif ($target eq 'tex') { 922: my $post='\vskip 0 mm '; 923: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 924: if ($align eq 'center') { 925: $post='\end{center}'; 926: } elsif ($align eq 'left') { 927: $post='} \hfill'.'\vskip 0 mm '; 928: } elsif ($align eq 'right') { 929: $post='}'.'\vskip 0 mm '; 930: } 931: $currentstring .= '}}'.$post; 932: } 933: return $currentstring; 934: } 935: 936: #--- <cite> tag (end tag required) 937: sub start_cite { 938: my ($target,$token) = @_; 939: my $currentstring = ''; 940: if ($target eq 'web') { 941: $currentstring .= $token->[4]; 942: } elsif ($target eq 'tex') { 943: $currentstring .= '\textit{'; 944: } 945: return $currentstring; 946: } 947: 948: sub end_cite { 949: my ($target,$token) = @_; 950: my $currentstring = ''; 951: if ($target eq 'web') { 952: $currentstring .= $token->[2]; 953: } elsif ($target eq 'tex') { 954: $currentstring .= '}'; 955: } 956: return $currentstring; 957: } 958: 959: #-- <i> tag (end tag required) 960: sub start_i { 961: my ($target,$token) = @_; 962: my $currentstring = ''; 963: if ($target eq 'web') { 964: $currentstring .= $token->[4]; 965: } elsif ($target eq 'tex') { 966: $currentstring .= '\textit{'; 967: } 968: return $currentstring; 969: } 970: 971: sub end_i { 972: my ($target,$token) = @_; 973: my $currentstring = ''; 974: if ($target eq 'web') { 975: $currentstring .= $token->[2]; 976: } elsif ($target eq 'tex') { 977: $currentstring .= '}'; 978: } 979: return $currentstring; 980: } 981: 982: #-- <address> tag (end tag required) 983: sub start_address { 984: my ($target,$token) = @_; 985: my $currentstring = ''; 986: if ($target eq 'web') { 987: $currentstring .= $token->[4]; 988: } elsif ($target eq 'tex') { 989: $currentstring .= '\textit{'; 990: } 991: return $currentstring; 992: } 993: 994: sub end_address { 995: my ($target,$token) = @_; 996: my $currentstring = ''; 997: if ($target eq 'web') { 998: $currentstring .= $token->[2]; 999: } elsif ($target eq 'tex') { 1000: $currentstring .= '}'; 1001: } 1002: return $currentstring; 1003: } 1004: 1005: #-- <dfn> tag (end tag required) 1006: sub start_dfn { 1007: my ($target,$token) = @_; 1008: my $currentstring = ''; 1009: if ($target eq 'web') { 1010: $currentstring .= $token->[4]; 1011: } elsif ($target eq 'tex') { 1012: $currentstring .= '\textit{'; 1013: } 1014: return $currentstring; 1015: } 1016: 1017: sub end_dfn { 1018: my ($target,$token) = @_; 1019: my $currentstring = ''; 1020: if ($target eq 'web') { 1021: $currentstring .= $token->[2]; 1022: } elsif ($target eq 'tex') { 1023: $currentstring .= '}'; 1024: } 1025: return $currentstring; 1026: } 1027: 1028: #-- <tt> tag (end tag required) 1029: sub start_tt { 1030: my ($target,$token) = @_; 1031: my $currentstring = ''; 1032: if ($target eq 'web') { 1033: $currentstring .= $token->[4]; 1034: } elsif ($target eq 'tex') { 1035: $currentstring .= '\texttt{'; 1036: } 1037: return $currentstring; 1038: } 1039: 1040: sub end_tt { 1041: my ($target,$token) = @_; 1042: my $currentstring = ''; 1043: if ($target eq 'web') { 1044: $currentstring .= $token->[2]; 1045: } elsif ($target eq 'tex') { 1046: $currentstring .= '}'; 1047: } 1048: return $currentstring; 1049: } 1050: 1051: #-- <kbd> tag (end tag required) 1052: sub start_kbd { 1053: my ($target,$token) = @_; 1054: my $currentstring = ''; 1055: if ($target eq 'web') { 1056: $currentstring .= $token->[4]; 1057: } elsif ($target eq 'tex') { 1058: $currentstring .= '\texttt{'; 1059: } 1060: return $currentstring; 1061: } 1062: 1063: sub end_kbd { 1064: my ($target,$token) = @_; 1065: my $currentstring = ''; 1066: if ($target eq 'web') { 1067: $currentstring .= $token->[2]; 1068: } elsif ($target eq 'tex') { 1069: $currentstring .= '}'; 1070: } 1071: return $currentstring; 1072: } 1073: 1074: #-- <code> tag (end tag required) 1075: sub start_code { 1076: my ($target,$token) = @_; 1077: my $currentstring = ''; 1078: if ($target eq 'web') { 1079: $currentstring .= $token->[4]; 1080: } elsif ($target eq 'tex') { 1081: $currentstring .= '\texttt{'; 1082: } 1083: return $currentstring; 1084: } 1085: 1086: sub end_code { 1087: my ($target,$token) = @_; 1088: my $currentstring = ''; 1089: if ($target eq 'web') { 1090: $currentstring .= $token->[2]; 1091: } elsif ($target eq 'tex') { 1092: $currentstring .= '}'; 1093: } 1094: return $currentstring; 1095: } 1096: 1097: #-- <em> tag (end tag required) 1098: sub start_em { 1099: my ($target,$token) = @_; 1100: my $currentstring = ''; 1101: if ($target eq 'web') { 1102: $currentstring .= $token->[4]; 1103: } elsif ($target eq 'tex') { 1104: $currentstring .= '\emph{'; 1105: } 1106: return $currentstring; 1107: } 1108: 1109: sub end_em { 1110: my ($target,$token) = @_; 1111: my $currentstring = ''; 1112: if ($target eq 'web') { 1113: $currentstring .= $token->[2]; 1114: } elsif ($target eq 'tex') { 1115: $currentstring .= '}'; 1116: } 1117: return $currentstring; 1118: } 1119: 1120: #-- <q> tag (end tag required) 1121: sub start_q { 1122: my ($target,$token) = @_; 1123: my $currentstring = ''; 1124: if ($target eq 'web') { 1125: $currentstring .= $token->[4]; 1126: } elsif ($target eq 'tex') { 1127: $currentstring .= '\emph{'; 1128: } 1129: return $currentstring; 1130: } 1131: 1132: sub end_q { 1133: my ($target,$token) = @_; 1134: my $currentstring = ''; 1135: if ($target eq 'web') { 1136: $currentstring .= $token->[2]; 1137: } elsif ($target eq 'tex') { 1138: $currentstring .= '}'; 1139: } 1140: return $currentstring; 1141: } 1142: 1143: # <p> is a bit strange since it does not require a closing </p> 1144: # However in latex, we must often output closing stuff to end 1145: # environments and {}'s etc. Therefore we do all the work 1146: # of figuring out the ending strings in the start tag processing, 1147: # and provide a mechanism to output the stop text external 1148: # to tag processing. 1149: # 1150: { 1151: 1152: my $closing_string = ''; # String required to close <p> 1153: 1154: # Some tags are <p> fragile meaning that <p> inside of them 1155: # does not work within TeX mode. This is managed via the 1156: # counter below: 1157: # 1158: 1159: my $para_disabled = 0; 1160: 1161: sub disable_para { 1162: $para_disabled++; 1163: } 1164: sub enable_para { 1165: $para_disabled--; 1166: } 1167: 1168: 1169: #-- <p> tag (end tag optional) 1170: #optional attribute - align="center|left|right" 1171: sub start_p { 1172: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1173: my $currentstring = ''; 1174: if ($target eq 'web') { 1175: $currentstring .= &end_p(); # close off prior para if in progress. 1176: $currentstring .= $token->[4]; 1177: if (! ($currentstring =~ /\//)) { 1178: $closing_string = '</p>'; # Deal correctly with <p /> e.g. 1179: } 1180: } elsif ($target eq 'tex' && !$para_disabled) { 1181: $currentstring .= &end_p(); # close off prior para if in progress. 1182: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 1183: if ($align eq 'center') { 1184: $currentstring .='\begin{center}\par'; 1185: $closing_string = '\end{center}'; 1186: } elsif ($align eq 'right') { 1187: $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{'; 1188: $closing_string= '}}'; 1189: } elsif ($align eq 'left') { 1190: $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{'; 1191: $closing_string = '}\hfill}'; 1192: } else { 1193: $currentstring.='\par '; 1194: $closing_string = '\strut\\\\\strut '; 1195: } 1196: 1197: } 1198: return $currentstring; 1199: } 1200: # 1201: # End paragraph processing just requires that we output the 1202: # closing string that was saved and blank it. 1203: sub end_p { 1204: # Note only 'tex' mode uses disable_para and enable_para 1205: # so we don't need to know the target in the check below: 1206: 1207: if (!$para_disabled) { 1208: my $current_string = $closing_string; 1209: $closing_string = ''; # Not in a para anymore. 1210: return $current_string; 1211: } else { 1212: return ''; 1213: } 1214: 1215: } 1216: } 1217: #-- <br> tag (end tag forbidden) 1218: sub start_br { 1219: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1220: my $currentstring = ''; 1221: if ($target eq 'web') { 1222: $currentstring .= $token->[4]; 1223: } elsif ($target eq 'tex') { 1224: my @tempo=@$tagstack; 1225: my $signal=0; 1226: # Not going to factor this to is_inside_of since that would require 1227: # multiple stack traversals. 1228: # 1229: for (my $i=$#tempo;$i>=0;$i--) { 1230: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') || 1231: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') || 1232: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) { 1233: $signal=1; 1234: last; 1235: } 1236: } 1237: if ($signal) { 1238: $currentstring .= ' \vskip 0 mm '; 1239: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') { 1240: $currentstring .= '\strut \\\\ \strut '; 1241: } 1242: } 1243: return $currentstring; 1244: } 1245: 1246: sub end_br { 1247: my ($target,$token) = @_; 1248: my $currentstring = ''; 1249: if ($target eq 'web') { 1250: $currentstring .= $token->[2]; 1251: } 1252: return $currentstring; 1253: } 1254: 1255: #-- <big> tag (end tag required) 1256: sub start_big { 1257: my ($target,$token) = @_; 1258: my $currentstring = ''; 1259: if ($target eq 'web') { 1260: $currentstring .= $token->[4]; 1261: } elsif ($target eq 'tex') { 1262: $currentstring .= '{\large '; 1263: } 1264: return $currentstring; 1265: } 1266: 1267: sub end_big { 1268: my ($target,$token) = @_; 1269: my $currentstring = ''; 1270: if ($target eq 'web') { 1271: $currentstring .= $token->[2]; 1272: } elsif ($target eq 'tex') { 1273: $currentstring .= '}'; 1274: } 1275: return $currentstring; 1276: } 1277: 1278: #-- <small> tag (end tag required) 1279: sub start_small { 1280: my ($target,$token) = @_; 1281: my $currentstring = ''; 1282: if ($target eq 'web') { 1283: $currentstring .= $token->[4]; 1284: } elsif ($target eq 'tex') { 1285: $currentstring .= '{\footnotesize '; 1286: } 1287: return $currentstring; 1288: } 1289: 1290: sub end_small { 1291: my ($target,$token) = @_; 1292: my $currentstring = ''; 1293: if ($target eq 'web') { 1294: $currentstring .= $token->[2]; 1295: } elsif ($target eq 'tex') { 1296: $currentstring .= '}'; 1297: } 1298: return $currentstring; 1299: } 1300: 1301: #-- <basefont> tag (end tag forbidden) 1302: sub start_basefont { 1303: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1304: my $currentstring = ''; 1305: if ($target eq 'web') { 1306: $currentstring = $token->[4]; 1307: } elsif ($target eq 'tex') { 1308: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval); 1309: if (defined $basesize) { 1310: $currentstring = '{\\'.$basesize.' '; 1311: } 1312: } 1313: return $currentstring; 1314: } 1315: 1316: sub end_basefont { 1317: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1318: my $currentstring = ''; 1319: if ($target eq 'web') { 1320: $currentstring = $token->[4]; 1321: } elsif ($target eq 'tex') { 1322: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval); 1323: if (defined $basesize) { 1324: $currentstring = '}'; 1325: } 1326: } 1327: return $currentstring; 1328: } 1329: 1330: #-- <font> tag (end tag required) 1331: sub start_font { 1332: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1333: my $currentstring = ''; 1334: if ($target eq 'web') { 1335: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval); 1336: if ($face!~/symbol/i) { 1337: if (($env{'browser.fontenhance'} eq 'on') || 1338: ($env{'browser.blackwhite'} eq 'on')) { return ''; } 1339: } 1340: $currentstring = $token->[4]; 1341: } elsif ($target eq 'tex') { 1342: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval); 1343: if (defined $fontsize) { 1344: $currentstring = '{\\'.$fontsize.' '; 1345: } 1346: } 1347: return $currentstring; 1348: } 1349: 1350: sub end_font { 1351: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_; 1352: my $currentstring = ''; 1353: if ($target eq 'web') { 1354: $currentstring = $token->[2]; 1355: } elsif ($target eq 'tex') { 1356: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval); 1357: if (defined $fontsize) { 1358: $currentstring = '}'; 1359: } 1360: } 1361: return $currentstring; 1362: } 1363: 1364: #-- <strike> tag (end tag required) 1365: sub start_strike { 1366: my ($target,$token) = @_; 1367: my $currentstring = ''; 1368: if ($target eq 'web') { 1369: $currentstring .= $token->[4]; 1370: } elsif ($target eq 'tex') { 1371: &Apache::lonxml::startredirection(); 1372: } 1373: return $currentstring; 1374: } 1375: 1376: sub end_strike { 1377: my ($target,$token) = @_; 1378: my $currentstring = ''; 1379: if ($target eq 'web') { 1380: $currentstring .= $token->[2]; 1381: } elsif ($target eq 'tex') { 1382: $currentstring=&Apache::lonxml::endredirection(); 1383: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 1384: $currentstring=~s/^\s*(\S)/\\underline\{$1/; 1385: $currentstring=~s/(\S)\s*$/$1\}/; 1386: } 1387: return $currentstring; 1388: } 1389: 1390: #-- <s> tag (end tag required) 1391: sub start_s { 1392: my ($target,$token) = @_; 1393: my $currentstring = ''; 1394: if ($target eq 'web') { 1395: $currentstring .= $token->[4]; 1396: } elsif ($target eq 'tex') { 1397: &Apache::lonxml::startredirection(); 1398: } 1399: return $currentstring; 1400: } 1401: 1402: sub end_s { 1403: my ($target,$token) = @_; 1404: my $currentstring = ''; 1405: if ($target eq 'web') { 1406: $currentstring .= $token->[2]; 1407: } elsif ($target eq 'tex') { 1408: $currentstring=&Apache::lonxml::endredirection(); 1409: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 1410: $currentstring=~s/^\s*(\S)/\\underline\{$1/; 1411: $currentstring=~s/(\S)\s*$/$1\}/; 1412: } 1413: return $currentstring; 1414: } 1415: 1416: #-- <sub> tag (end tag required) 1417: sub start_sub { 1418: my ($target,$token) = @_; 1419: my $currentstring = ''; 1420: if ($target eq 'web') { 1421: $currentstring .= $token->[4]; 1422: } elsif ($target eq 'tex') { 1423: $currentstring .= '\ensuremath{_{'; 1424: } 1425: return $currentstring; 1426: } 1427: 1428: sub end_sub { 1429: my ($target,$token) = @_; 1430: my $currentstring = ''; 1431: if ($target eq 'web') { 1432: $currentstring .= $token->[2]; 1433: } elsif ($target eq 'tex') { 1434: $currentstring .= '}}'; 1435: } 1436: return $currentstring; 1437: } 1438: 1439: #-- <sup> tag (end tag required) 1440: sub start_sup { 1441: my ($target,$token) = @_; 1442: my $currentstring = ''; 1443: if ($target eq 'web') { 1444: $currentstring .= $token->[4]; 1445: } elsif ($target eq 'tex') { 1446: $currentstring .= '\ensuremath{^{'; 1447: } 1448: return $currentstring; 1449: } 1450: 1451: sub end_sup { 1452: my ($target,$token) = @_; 1453: my $currentstring = ''; 1454: if ($target eq 'web') { 1455: $currentstring .= $token->[2]; 1456: } elsif ($target eq 'tex') { 1457: $currentstring .= '}}'; 1458: } 1459: return $currentstring; 1460: } 1461: 1462: #-- <hr> tag (end tag forbidden) 1463: sub start_hr { 1464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1465: my $currentstring = &end_p(); # End enclosing para. 1466: if ($target eq 'web') { 1467: $currentstring .= $token->[4]; 1468: } elsif ($target eq 'tex') { 1469: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0); 1470: if (defined $LaTeXwidth) { 1471: if ($LaTeXwidth=~/^%/) { 1472: substr($LaTeXwidth,0,1)=''; 1473: $LaTeXwidth=($LaTeXwidth/100).'\textwidth'; 1474: } 1475: } else { 1476: $LaTeXwidth ='0.9\textwidth'; 1477: } 1478: my ($pre,$post); 1479: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 1480: if (($align eq 'center') || (not defined $align)) { 1481: $pre=''; $post=''; 1482: } elsif ($align eq 'left') { 1483: $pre='\rlap{'; $post='} \hfill'; 1484: } elsif ($align eq 'right') { 1485: $pre=' \hfill \llap{'; $post='}'; 1486: } 1487: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['. 1488: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm '; 1489: } 1490: return $currentstring; 1491: } 1492: 1493: sub end_hr { 1494: my ($target,$token) = @_; 1495: my $currentstring = ''; 1496: if ($target eq 'web') { 1497: $currentstring .= $token->[2]; 1498: } 1499: return $currentstring; 1500: } 1501: 1502: #-- <div> tag (end tag required) 1503: { 1504: 1505: # Since div can be nested, the stack below is used 1506: # in 'tex' mode to store the ending strings 1507: # for the div stack. 1508: 1509: my @div_end_stack; 1510: 1511: sub start_div { 1512: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_; 1513: my $currentstring = &end_p(); # Close enclosing para. 1514: if ($target eq 'web') { 1515: $currentstring .= $token->[4]; 1516: } 1517: if ($target eq 'tex') { 1518: # 4 possible alignments: left, right, center, and -missing-. 1519: 1520: my $endstring = ''; 1521: 1522: my $align = lc(&Apache::lonxml::get_param('align', $parstack, 1523: $safeeval, undef, 1)); 1524: if ($align eq 'center') { 1525: $currentstring .= '\begin{center}'; 1526: $endstring = '\end{center}'; 1527: } 1528: elsif ($align eq 'right') { 1529: $currentstring .= '\begin{flushright}'; 1530: $endstring .= '\end{flushright}'; 1531: } elsif ($align eq 'left') { 1532: $currentstring .= '\begin{flushleft}'; 1533: $endstring = '\end{flushleft}'; 1534: } else { 1535: 1536: } 1537: $currentstring .= "\n"; # For human readability. 1538: $endstring = "\n$endstring\n"; # For human readability 1539: push(@div_end_stack, $endstring); 1540: } 1541: return $currentstring; 1542: } 1543: 1544: sub end_div { 1545: my ($target,$token) = @_; 1546: my $currentstring = ''; 1547: if ($target eq 'web') { 1548: $currentstring .= $token->[2]; 1549: } 1550: if ($target eq 'tex') { 1551: my $endstring = pop @div_end_stack; 1552: $currentstring .= $endstring; 1553: } 1554: return $currentstring; 1555: } 1556: } 1557: 1558: #-- <a> tag (end tag required) 1559: sub start_a { 1560: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1561: my $currentstring = ''; 1562: if ($target eq 'web') { 1563: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval, 1564: undef,1); 1565: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href}); 1566: } elsif ($target eq 'tex') { 1567: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1); 1568: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1); 1569: if ($a=~/\S/) { 1570: $a=~s/([^\\])%/$1\\\%/g; 1571: $currentstring .= '\ref{URI: '.$a.'}'; 1572: } elsif ($b=~/\S/) { 1573: $currentstring .= '\ref{Anchor: '.$b.'}'; 1574: } else { 1575: $currentstring.=''; 1576: } 1577: } 1578: return $currentstring; 1579: } 1580: 1581: sub end_a { 1582: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1583: my $currentstring = ''; 1584: if ($target eq 'web') { 1585: $currentstring .= $token->[2]; 1586: } 1587: return $currentstring; 1588: } 1589: 1590: #-- <li> tag (end tag optional) 1591: sub start_li { 1592: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1593: my $currentstring = ''; 1594: if ($target eq 'web') { 1595: $currentstring = $token->[4]; 1596: } elsif ($target eq 'tex') { 1597: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0); 1598: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0); 1599: #FIXME need to support types i and I 1600: if ($type=~/disc/) { 1601: $currentstring .= ' \item[$\bullet$] '; 1602: } elsif ($type=~/circle/) { 1603: $currentstring .= ' \item[$\circ$] '; 1604: } elsif ($type=~/square/) { 1605: $currentstring .= ' \item[$\diamond$] '; 1606: } elsif ($type eq '1') { 1607: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]'; 1608: } elsif ($type eq 'A') { 1609: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]'; 1610: } elsif ($type eq 'a') { 1611: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]'; 1612: } elsif ($value ne '') { 1613: $currentstring .= ' \item['.$value.'] '; 1614: } else { 1615: $currentstring .= ' \item '; 1616: } 1617: $Apache::londefdef::list_index++; 1618: } 1619: return $currentstring; 1620: } 1621: 1622: sub end_li { 1623: my ($target,$token) = @_; 1624: my $currentstring = &end_p(); # In case there's a <p> in the <li> 1625: if ($target eq 'web') { 1626: $currentstring .= $token->[2]; 1627: } 1628: return $currentstring; 1629: } 1630: 1631: #-- <u> tag (end tag required) 1632: sub start_u { 1633: my ($target,$token) = @_; 1634: my $currentstring = ''; 1635: if ($target eq 'web') { 1636: $currentstring .= $token->[4]; 1637: } elsif ($target eq 'tex') { 1638: &Apache::lonxml::startredirection(); 1639: } 1640: return $currentstring; 1641: } 1642: 1643: sub end_u { 1644: my ($target,$token) = @_; 1645: my $currentstring = ''; 1646: if ($target eq 'web') { 1647: $currentstring .= $token->[2]; 1648: } elsif ($target eq 'tex') { 1649: $currentstring=&Apache::lonxml::endredirection(); 1650: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g; 1651: $currentstring=~s/^\s*(\S)/\\underline\{$1/; 1652: $currentstring=~s/(\S)\s*$/$1\}/; 1653: } 1654: return $currentstring; 1655: } 1656: 1657: #-- <ul> tag (end tag required) 1658: sub start_ul { 1659: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1660: my $currentstring = &end_p(); # Close off enclosing list. 1661: if ($target eq 'web') { 1662: $currentstring .= $token->[4]; 1663: } elsif ($target eq 'tex') { 1664: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0); 1665: $Apache::londefdef::list_index=0; 1666: if ($TeXtype eq 'disc') { 1667: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'. 1668: '\renewcommand{\labelitemii}{$\bullet$}'. 1669: '\renewcommand{\labelitemiii}{$\bullet$}'. 1670: '\renewcommand{\labelitemiv}{$\bullet$}'; 1671: } elsif ($TeXtype eq 'circle') { 1672: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'. 1673: '\renewcommand{\labelitemii}{$\circ$}'. 1674: '\renewcommand{\labelitemiii}{$\circ$}'. 1675: '\renewcommand{\labelitemiv}{$\circ$}'; 1676: } elsif ($TeXtype eq 'square') { 1677: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'. 1678: '\renewcommand{\labelitemii}{$\diamond$}'. 1679: '\renewcommand{\labelitemiii}{$\diamond$}'. 1680: '\renewcommand{\labelitemiv}{$\diamond$}'; 1681: } 1682: $currentstring .= '\strut \begin{itemize}'; 1683: } 1684: return $currentstring; 1685: } 1686: 1687: sub end_ul { 1688: my ($target,$token) = @_; 1689: my $currentstring = ''; 1690: if ($target eq 'web') { 1691: $currentstring = $token->[2]; 1692: } elsif ($target eq 'tex') { 1693: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'. 1694: '\renewcommand{\labelitemii}{$\bullet$}'. 1695: '\renewcommand{\labelitemiii}{$\bullet$}'. 1696: '\renewcommand{\labelitemiv}{$\bullet$}\strut '; 1697: } 1698: return $currentstring; 1699: } 1700: 1701: #-- <menu> tag (end tag required) 1702: sub start_menu { 1703: my ($target,$token) = @_; 1704: my $currentstring = ''; 1705: if ($target eq 'web') { 1706: $currentstring = $token->[4]; 1707: } elsif ($target eq 'tex') { 1708: $currentstring = " \\begin{itemize} "; 1709: } 1710: return $currentstring; 1711: } 1712: 1713: sub end_menu { 1714: my ($target,$token) = @_; 1715: my $currentstring = ''; 1716: if ($target eq 'web') { 1717: $currentstring = $token->[2]; 1718: } elsif ($target eq 'tex') { 1719: $currentstring = " \\end{itemize}"; 1720: } 1721: return $currentstring; 1722: } 1723: 1724: #-- <dir> tag (end tag required) 1725: sub start_dir { 1726: my ($target,$token) = @_; 1727: my $currentstring = &end_p(); # In case there's a <p> prior to the list. 1728: if ($target eq 'web') { 1729: $currentstring .= $token->[4]; 1730: } elsif ($target eq 'tex') { 1731: $currentstring .= " \\begin{itemize} "; 1732: } 1733: return $currentstring; 1734: } 1735: 1736: sub end_dir { 1737: my ($target,$token) = @_; 1738: my $currentstring = ''; 1739: if ($target eq 'web') { 1740: $currentstring = $token->[2]; 1741: } elsif ($target eq 'tex') { 1742: $currentstring = " \\end{itemize}"; 1743: } 1744: return $currentstring; 1745: } 1746: 1747: #-- <ol> tag (end tag required) 1748: sub start_ol { 1749: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1750: my $currentstring = &end_p(); # In case there's a <p> prior to the list. 1751: if ($target eq 'web') { 1752: $currentstring .= $token->[4]; 1753: } elsif ($target eq 'tex') { 1754: $Apache::londefdef::list_index=0; 1755: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0); 1756: if ($type eq '1') { 1757: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'. 1758: '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 1759: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'. 1760: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}'; 1761: } elsif ($type eq 'A') { 1762: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'. 1763: '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 1764: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'. 1765: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}'; 1766: } elsif ($type eq 'a') { 1767: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'. 1768: '\renewcommand{\labelenumii}{\alph{enumii}.}'. 1769: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'. 1770: '\renewcommand{\labelenumiv}{\alph{enumiv}.}'; 1771: } elsif ($type eq 'i') { 1772: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'. 1773: '\renewcommand{\labelenumii}{\roman{enumii}.}'. 1774: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'. 1775: '\renewcommand{\labelenumiv}{\roman{enumiv}.}'; 1776: } elsif ($type eq 'I') { 1777: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'. 1778: '\renewcommand{\labelenumii}{\Roman{enumii}.}'. 1779: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'. 1780: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}'; 1781: } 1782: $currentstring .= '\strut \begin{enumerate}'; 1783: } 1784: return $currentstring; 1785: } 1786: 1787: sub end_ol { 1788: my ($target,$token) = @_; 1789: my $currentstring = ''; 1790: if ($target eq 'web') { 1791: $currentstring = $token->[2]; 1792: } elsif ($target eq 'tex') { 1793: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'. 1794: '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 1795: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'. 1796: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut '; 1797: } 1798: return $currentstring; 1799: } 1800: 1801: #-- <dl> tag (end tag required) 1802: sub start_dl { 1803: my ($target,$token) = @_; 1804: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list. 1805: if ($target eq 'web') { 1806: $currentstring .= $token->[4]; 1807: } elsif ($target eq 'tex') { 1808: $currentstring .= '\begin{description}'; 1809: $Apache::londefdef::DL++; 1810: push(@Apache::londefdef::description,[]); 1811: $Apache::londefdef::DD[$Apache::londefdef::DL]=0; 1812: $Apache::londefdef::DT[$Apache::londefdef::DL]=0; 1813: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0; 1814: } 1815: return $currentstring; 1816: } 1817: 1818: sub end_dl { 1819: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1820: my $currentstring = ''; 1821: if ($target eq 'web') { 1822: $currentstring = $token->[2]; 1823: } elsif ($target eq 'tex') { 1824: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); } 1825: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); } 1826: foreach my $element (@{$Apache::londefdef::description[-1]}) { 1827: $currentstring.=' '.$element.' '; 1828: } 1829: pop(@Apache::londefdef::description); 1830: $currentstring.='\end{description}'; 1831: delete($Apache::londefdef::DD[$Apache::londefdef::DL]); 1832: delete($Apache::londefdef::DT[$Apache::londefdef::DL]); 1833: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]); 1834: $Apache::londefdef::DL--; 1835: } 1836: return $currentstring; 1837: } 1838: 1839: #-- <dt> tag (end tag optional) 1840: sub start_dt { 1841: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1842: my $currentstring=''; 1843: if ($target eq 'web') { 1844: $currentstring = $token->[4]; 1845: } elsif ($target eq 'tex') { 1846: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); } 1847: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); } 1848: &Apache::lonxml::startredirection(); 1849: $Apache::londefdef::DT[-1]++; 1850: $Apache::londefdef::seenDT[-1]=1; 1851: } 1852: return $currentstring; 1853: } 1854: 1855: sub end_dt { 1856: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1857: my $currentstring = ''; 1858: if ($target eq 'web') { 1859: $currentstring = $token->[2]; 1860: } elsif ($target eq 'tex') { 1861: if ($Apache::londefdef::DT[-1]) { 1862: my $data=&item_cleanup(); 1863: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm'); 1864: $Apache::londefdef::DT[-1]--; 1865: } 1866: } 1867: return $currentstring; 1868: } 1869: 1870: sub item_cleanup { 1871: my $item=&Apache::lonxml::endredirection(); 1872: $item=~s/\\begin{center}//g; 1873: $item=~s/\\end{center}//g; 1874: return $item; 1875: } 1876: 1877: #-- <dd> tag (end tag optional) 1878: sub start_dd { 1879: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1880: my $currentstring = ''; 1881: if ($target eq 'web') { 1882: $currentstring = $token->[4]; 1883: } elsif ($target eq 'tex') { 1884: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); } 1885: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);} 1886: if (!$Apache::londefdef::seenDT[-1]) { 1887: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm '); 1888: } 1889: push(@{$Apache::londefdef::description[-1]},''); 1890: $Apache::londefdef::description[-1]->[-1].=' \strut '; 1891: $Apache::londefdef::DD[-1]++; 1892: &Apache::lonxml::startredirection(); 1893: } 1894: return $currentstring; 1895: } 1896: 1897: sub end_dd { 1898: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1899: my $currentstring = ''; 1900: if ($target eq 'web') { 1901: $currentstring = $token->[2]; 1902: } elsif ($target eq 'tex') { 1903: $Apache::londefdef::description[-1]->[-1].= 1904: &Apache::lonxml::endredirection().' \vskip 0mm '; 1905: $Apache::londefdef::DD[-1]--; 1906: } 1907: return $currentstring; 1908: } 1909: 1910: #-- <table> tag (end tag required) 1911: # <table> also ends any prior <p> that is not closed. 1912: # but, unless I allow <p>'s to nest, that's the 1913: # only way I could think of to allow <p> in 1914: # <tr> <th> bodies 1915: # 1916: #list of supported attributes: border,width,TeXwidth 1917: sub start_table { 1918: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1919: my $textwidth = ''; 1920: my $currentstring = &end_p(); 1921: if ($target eq 'web') { 1922: $currentstring .= $token->[4]; 1923: } elsif ($target eq 'tex') { 1924: my $aa = {}; 1925: push @Apache::londefdef::table, $aa; 1926: $Apache::londefdef::table[-1]{'row_number'} = -1; 1927: #maximum table's width (default coincides with text line length) 1928: if ($#Apache::londefdef::table==0) { 1929: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm 1930: $textwidth=~/(\d+\.?\d*)/; 1931: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame 1932: } else { 1933: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) { 1934: #the maximum width of nested table is determined by LATeX width of parent cell 1935: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 1936: } else { 1937: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly 1938: $textwidth=$Apache::londefdef::table[-2]{'width'}; 1939: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) { 1940: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i]; 1941: } 1942: } 1943: } 1944: 1945: # width either comes forced from the TeXwidth or the width parameters. 1946: # in either case it can be a percentage or absolute width. 1947: 1948: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0); 1949: if (not defined $TeXwidth) { 1950: $TeXwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1); 1951: 1952: } else { 1953: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1; 1954: } 1955: if ($TeXwidth=~/%/) { 1956: $Apache::londefdef::table[-1]{'percent'}=1; 1957: $TeXwidth=~/(\d+)/; 1958: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100; 1959: } else { 1960: $Apache::londefdef::table[-1]{'width'}=$TeXwidth; 1961: } 1962: 1963: #table's border 1964: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 1965: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0); 1966: unless (defined $border) { $border = 0; } 1967: if ($border) { 1968: $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 1969: $Apache::londefdef::table[-1]{'vinc'} = '&'; 1970: $Apache::londefdef::table[-1]{'vvinc'} = '|'; 1971: } else { 1972: $Apache::londefdef::table[-1]{'hinc'} = ''; 1973: $Apache::londefdef::table[-1]{'vinc'} = '&'; 1974: $Apache::londefdef::table[-1]{'vvinc'} = ''; 1975: } 1976: if ($#Apache::londefdef::table==0) { 1977: # Note that \newline seems to destroy the alignment envs. 1978: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}'; 1979: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}'; 1980: } 1981: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} '; 1982: $Apache::londefdef::table[-1]{'TeXlen'}=[]; 1983: $Apache::londefdef::table[-1]{'objectlen'}=[]; 1984: $Apache::londefdef::table[-1]{'objectsignal'}=[]; 1985: $Apache::londefdef::table[-1]{'maxlen'}=[]; 1986: $Apache::londefdef::table[-1]{'minlen'}=[]; 1987: $Apache::londefdef::table[-1]{'content'}=[]; 1988: $Apache::londefdef::table[-1]{'align'}=[]; 1989: $currentstring.='\keephidden{NEW TABLE ENTRY}'; 1990: 1991: 1992: } 1993: return $currentstring; 1994: } 1995: 1996: sub end_table { 1997: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 1998: my $currentstring = ''; 1999: if ($target eq 'web') { 2000: $currentstring = $token->[2]; 2001: } elsif ($target eq 'tex') { 2002: my $inmemory = ''; 2003: my $output = ''; 2004: my $WARNING=''; 2005: #width of columns from TeXwidth attributes 2006: 2007: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) { 2008: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) { 2009: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) { 2010: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]; 2011: } 2012: } 2013: } 2014: #free space and number of empty columns 2015: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0); 2016: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 2017: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) { 2018: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) { 2019: $empty_columns++; 2020: } else { 2021: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]; 2022: } 2023: } 2024: #boundaries for contents columns 2025: my @min_len=();#columns can not be narrower 2026: my @max_len=();#maximum length of column 2027: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) { 2028: my ($localmin,$localmax)=(0,0); 2029: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) { 2030: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) { 2031: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]; 2032: } 2033: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) { 2034: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]; 2035: } 2036: } 2037: push @min_len, $localmin; 2038: push @max_len, $localmax; 2039: } 2040: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) { 2041: my $localmin=0,; 2042: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) { 2043: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) { 2044: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]; 2045: } 2046: } 2047: if ($max_len[$jn]<$localmin) { 2048: $max_len[$jn]=$localmin; 2049: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1; 2050: }#object size is bigger 2051: if ($min_len[$jn]<$localmin) { 2052: $min_len[$jn]=$localmin; 2053: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1; 2054: }#object size is bigger 2055: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) { 2056: $min_len[$jn]=0; 2057: $max_len[$jn]=0; 2058: } 2059: } 2060: #final adjustment of column width 2061: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array 2062: my @adjust=(); 2063: #step 1. adjustment by maximum value 2064: my $space_neeeded=0; 2065: for (my $jn=0;$jn<=$#max_len;$jn++) { 2066: $space_neeeded=$space_neeeded+$max_len[$jn]; 2067: } 2068: if ($space_neeeded<=$available_space) { 2069: for (my $jn=0;$jn<=$#max_len;$jn++) { 2070: if ($fwidth[$jn]==0) { 2071: $fwidth[$jn]=$max_len[$jn]; 2072: } 2073: } 2074: } else { 2075: #step 2. adjustment by minimum value (estimation) 2076: $space_neeeded=0; 2077: for (my $jn=0;$jn<=$#min_len;$jn++) { 2078: $space_neeeded+=$min_len[$jn]; 2079: } 2080: if ($space_neeeded>$available_space) { 2081: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} '; 2082: for (my $jn=0;$jn<=$#max_len;$jn++) { 2083: if ($fwidth[$jn]==0) { 2084: $fwidth[$jn]=$min_len[$jn]; 2085: } 2086: } 2087: #check if we have objects which can be scaled 2088: my $how_many_to_scale=0; 2089: my @to_scale=(); 2090: for (my $jn=0;$jn<=$#max_len;$jn++) { 2091: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') { 2092: $how_many_to_scale++; 2093: push @to_scale, $jn; 2094: } 2095: } 2096: if ($how_many_to_scale>0) { 2097: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale; 2098: foreach my $jn (@to_scale) { 2099: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) { 2100: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/; 2101: if ($1 ne '') { 2102: my $current_length=&recalc($1); 2103: $current_length=~/(\d+\.?\d*)/; 2104: $current_length=$current_length-$space_to_adjust; 2105: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/; 2106: } 2107: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/; 2108: if ($1 ne '') { 2109: my $current_length=$1; 2110: $current_length=$current_length-$space_to_adjust; 2111: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/; 2112: } 2113: } 2114: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust; 2115: } 2116: } 2117: } else { 2118: #step 3. adjustment over minimal + corrections 2119: my $enlarge_coef=$available_space/$space_neeeded; 2120: my $acsessive=0; 2121: for (my $jn=0;$jn<=$#min_len;$jn++) { 2122: $adjust[$jn]=$min_len[$jn]*$enlarge_coef; 2123: if ($adjust[$jn]>$max_len[$jn]) { 2124: $fwidth[$jn]=$max_len[$jn]; 2125: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn]; 2126: $adjust[$jn]=0; 2127: } 2128: } 2129: if ($acsessive>0) { 2130: #we have an excess of space and can redistribute it 2131: my $notempty_columns=0; 2132: for (my $jn=0;$jn<=$#min_len;$jn++) { 2133: if ($adjust[$jn]!=0) { 2134: $notempty_columns++; 2135: } 2136: } 2137: my $per_column=$acsessive/$notempty_columns; 2138: for (my $jn=0;$jn<=$#min_len;$jn++) { 2139: if ($adjust[$jn]!=0) { 2140: $adjust[$jn]+=$per_column; 2141: $fwidth[$jn]=$adjust[$jn]; 2142: } 2143: } 2144: } else { 2145: for (my $jn=0;$jn<=$#min_len;$jn++) { 2146: $fwidth[$jn]=$adjust[$jn]; 2147: } 2148: } 2149: } 2150: } 2151: #use all available width if it is defined in % or as TeXwidth 2152: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) { 2153: my $current=0; 2154: for (my $i=0;$i<=$#fwidth;$i++) { 2155: $current+=$fwidth[$i]; 2156: } 2157: my $coef=$Apache::londefdef::table[-1]{'width'}/$current; 2158: for (my $i=0;$i<=$#fwidth;$i++) { 2159: $fwidth[$i]*=$coef; 2160: } 2161: } 2162: #removing of empty columns if allowed 2163: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0); 2164: if ($permission eq 'yes') { 2165: my @cleaned_table=(); 2166: my @cleaned_header=(); 2167: my $colind=0; 2168: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) { 2169: if ($fwidth[$jn]!=0) { 2170: #we need to copy column 2171: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) { 2172: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn]; 2173: $cleaned_header[$colind]=$fwidth[$jn]; 2174: } 2175: $colind++; 2176: } 2177: } 2178: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table; 2179: @fwidth=@cleaned_header; 2180: } 2181: #construct header of the table 2182: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'}; 2183: for (my $in=0;$in<=$#fwidth;$in++) { 2184: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'}; 2185: } 2186: $header_of_table .= '}'; 2187: #fill the table 2188: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) { 2189: for (my $jn=0;$jn<=$#fwidth;$jn++) { 2190: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') { 2191: # $output.='\vspace*{-6 mm}\begin{center}'; 2192: $output.='\begin{center}'; 2193: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') { 2194: $output.=' \hfill \llap{' 2195: } 2196: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn]; 2197: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') { 2198: # $output.='\end{center}\vspace*{-6 mm}'; 2199: $output.='\end{center}'; 2200: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') { 2201: $output.='} '; 2202: } 2203: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};} 2204: } 2205: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' '; 2206: } 2207: # Note that \newline destroys alignment env's produced by e.g. <div> 2208: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut '; 2209: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut '; 2210: if ($#Apache::londefdef::table > 0) { 2211: my $inmemory = $Apache::londefdef::table[-1]{'output'}; 2212: # Figure out max/and min width by summing us and then 2213: # apply that to the current column of the table we nest in 2214: # if it's larger than the current width or the current width 2215: # is undefined. 2216: # 2217: my $min_nested_width = 0; 2218: my $max_nested_width = 0; 2219: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) { 2220: $min_nested_width += $min_len[$col]; 2221: $max_nested_width += $max_len[$col]; 2222: 2223: } 2224: # Fudge in an extra 5 mm for borders etc: 2225: 2226: $min_nested_width += 5; 2227: $max_nested_width += 5; 2228: 2229: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'}; 2230: my $outer_row = $Apache::londefdef::table[-2]{'row_number'}; 2231: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) { 2232: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width; 2233: } 2234: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) { 2235: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width; 2236: } 2237: 2238: pop @Apache::londefdef::table; 2239: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory; 2240: } else { 2241: $currentstring .= $Apache::londefdef::table[-1]{'output'}; 2242: pop @Apache::londefdef::table; 2243: undef @Apache::londefdef::table; 2244: } 2245: } 2246: return $currentstring; 2247: } 2248: 2249: #-- <tr> tag (end tag optional) 2250: sub start_tr { 2251: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2252: my $currentstring = ''; 2253: if ($target eq 'web') { 2254: $currentstring = $token->[4]; 2255: } elsif ($target eq 'tex') { 2256: $Apache::londefdef::table[-1]{'row_number'}++; 2257: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1); 2258: if ($alignchar ne '') { 2259: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1); 2260: } else { 2261: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l'; 2262: } 2263: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'}); 2264: # 2265: # Need to save the number of table columns to preserve the max # columns. 2266: # 2267: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'}; 2268: $Apache::londefdef::table[-1]{'counter_columns'} = -1; 2269: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, []; 2270: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, []; 2271: push @ {$Apache::londefdef::table[-1]{'minlen'}}, []; 2272: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, []; 2273: push @ {$Apache::londefdef::table[-1]{'content'}}, []; 2274: } 2275: return $currentstring; 2276: } 2277: 2278: sub end_tr { 2279: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2280: my $currentstring = &end_p(); # Close any pending <p> in the row. 2281: if ($target eq 'web') { 2282: $currentstring .= $token->[2]; 2283: } elsif ($target eq 'tex') { 2284: if ($Apache::londefdef::TD_redirection) { 2285: &end_td_tex($parstack,$parser,$safeeval); 2286: } 2287: # Counter columns must be the maximum number of columns seen 2288: # in the table so far so: 2289: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) { 2290: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'}; 2291: } 2292: 2293: 2294: 2295: } 2296: return $currentstring; 2297: } 2298: 2299: #-- <td> tag (end tag optional) 2300: sub start_td { 2301: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2302: my $currentstring = ''; 2303: if ($target eq 'web') { 2304: $currentstring = $token->[4]; 2305: } elsif ($target eq 'tex') { 2306: $Apache::londefdef::TD_redirection = 1; 2307: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval); 2308: } 2309: return $currentstring; 2310: } 2311: 2312: sub tag_check { 2313: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_; 2314: my @ar=@$parstack; 2315: for (my $i=$#ar-1;$i>=0;$i--) { 2316: if (lc($$tagstack[$i]) eq $good_tag) { 2317: &start_td_tex($parstack,$parser,$safeeval); 2318: last; 2319: } elsif (lc($$tagstack[$i]) eq $bad_tag) { 2320: splice @ar, $i+1; 2321: &end_td_tex(\@ar,$parser,$safeeval); 2322: &start_td_tex($parstack,$parser,$safeeval); 2323: last; 2324: } 2325: } 2326: return ''; 2327: } 2328: 2329: sub start_td_tex { 2330: my ($parstack,$parser,$safeeval) = @_; 2331: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1); 2332: if ($alignchar eq '') { 2333: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1]; 2334: } 2335: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar; 2336: $Apache::londefdef::table[-1]{'counter_columns'}++; 2337: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0); 2338: if (defined $TeXwidth) { 2339: my $current_length=&recalc($TeXwidth); 2340: $current_length=~/(\d+\.?\d*)/; 2341: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1; 2342: } 2343: &Apache::lonxml::startredirection(); 2344: return ''; 2345: } 2346: 2347: sub end_td_tex { 2348: my ($parstack,$parser,$safeeval) = @_; 2349: my $current_row = $Apache::londefdef::table[-1]{'row_number'}; 2350: my $data=&Apache::lonxml::endredirection(); 2351: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0); 2352: if (defined $TeXwidth) { 2353: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2354: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2355: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2356: } else { 2357: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) { 2358: my $garbage_data=$data; 2359: my $fwidth=0; 2360: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) { 2361: my $current_length=&recalc($1); 2362: $current_length=~/(\d+\.?\d*)/; 2363: if ($fwidth<$1) {$fwidth=$1;} 2364: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//; 2365: } 2366: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) { 2367: my $current_length=$1; 2368: if ($fwidth<$current_length) {$fwidth=$current_length;} 2369: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//; 2370: } 2371: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2372: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth; 2373: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2374: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2375: } elsif ($data=~/\\parbox\{\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*\s*\}/ or $data=~/\\epsfxsize\s*=\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*/) { 2376: my $garbage_data=$data; 2377: my $fwidth=0; 2378: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) { 2379: my $current_length=&recalc($1); 2380: $current_length=~/(\d+\.?\d*)/; 2381: if ($fwidth<$1) {$fwidth=$1;} 2382: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//; 2383: } 2384: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) { 2385: my $current_length=&recalc($1); 2386: $current_length=~/(\d+\.?\d*)/; 2387: if ($fwidth<$1) {$fwidth=$1;} 2388: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//; 2389: } 2390: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2391: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth; 2392: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2393: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2394: $data=~s/\\\\\s*$//; 2395: } else { 2396: $data=~s/^\s+(\S.*)/$1/; 2397: $data=~s/(.*\S)\s+$/$1/; 2398: $data=~s/(\s)+/$1/; 2399: my ($current_length,$min_length)=(0,0); 2400: if ($data=~/\\vskip/) { 2401: my $newdata=$data; 2402: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g; 2403: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata); 2404: foreach my $elementdata (@newdata) { 2405: my $lengthnewdata=2.5*&LATEX_length($elementdata); 2406: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;} 2407: my @words=split(/ /,$elementdata); 2408: foreach my $word (@words) { 2409: my $lengthword=2.5*&LATEX_length($word); 2410: if ($min_length<$lengthword) {$min_length=$lengthword;} 2411: } 2412: } 2413: } else { 2414: $current_length=2.5*&LATEX_length($data); 2415: my @words=split(/ /,$data); 2416: foreach my $word (@words) { 2417: my $lengthword=2*&LATEX_length($word); 2418: if ($min_length<$lengthword) {$min_length=$lengthword;} 2419: } 2420: } 2421: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2422: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2423: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length; 2424: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length; 2425: } 2426: } 2427: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) { 2428: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}}; 2429: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/; 2430: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/; 2431: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/; 2432: 2433: } 2434: # Should be be killing off the 'include' elements as they're used up? 2435: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data; 2436: return ''; 2437: } 2438: 2439: sub end_td { 2440: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2441: my $currentstring = ''; 2442: if ($target eq 'web') { 2443: $currentstring = $token->[2]; 2444: } elsif ($target eq 'tex') { 2445: $Apache::londefdef::TD_redirection =0; 2446: &end_td_tex($parstack,$parser,$safeeval); 2447: } 2448: return $currentstring; 2449: } 2450: 2451: #-- <th> tag (end tag optional) 2452: sub start_th { 2453: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2454: my $currentstring = ''; 2455: if ($target eq 'web') { 2456: $currentstring = $token->[4]; 2457: } elsif ($target eq 'tex') { 2458: $Apache::londefdef::TD_redirection = 1; 2459: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval); 2460: } 2461: return $currentstring; 2462: } 2463: 2464: sub tagg_check { 2465: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_; 2466: my @ar=@$parstack; 2467: for (my $i=$#ar-1;$i>=0;$i--) { 2468: if (lc($$tagstack[$i]) eq $good_tag) { 2469: &start_th_tex($parstack,$parser,$safeeval); 2470: last; 2471: } elsif (lc($$tagstack[$i]) eq $bad_tag) { 2472: splice @ar, $i+1; 2473: &end_th_tex(\@ar,$parser,$safeeval); 2474: &start_th_tex($parstack,$parser,$safeeval); 2475: last; 2476: } 2477: } 2478: return ''; 2479: } 2480: 2481: sub start_th_tex { 2482: my ($parstack,$parser,$safeeval) = @_; 2483: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1); 2484: if ($alignchar eq '') { 2485: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1]; 2486: } 2487: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar; 2488: $Apache::londefdef::table[-1]{'counter_columns'}++; 2489: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0); 2490: if (defined $TeXwidth) { 2491: my $current_length=&recalc($TeXwidth); 2492: $current_length=~/(\d+\.?\d*)/; 2493: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1; 2494: } 2495: &Apache::lonxml::startredirection(); 2496: return ''; 2497: } 2498: 2499: sub end_th_tex { 2500: my ($parstack,$parser,$safeeval) = @_; 2501: my $current_row = $Apache::londefdef::table[-1]{'row_number'}; 2502: my $data=&Apache::lonxml::endredirection(); 2503: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0); 2504: if (defined $TeXwidth) { 2505: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2506: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2507: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2508: } else { 2509: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) { 2510: my $garbage_data=$data; 2511: my $fwidth=0; 2512: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) { 2513: my $current_length=&recalc($1); 2514: $current_length=~/(\d+\.?\d*)/; 2515: if ($fwidth<$1) {$fwidth=$1;} 2516: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//; 2517: } 2518: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) { 2519: my $current_length=$1; 2520: if ($fwidth<$current_length) {$fwidth=$current_length;} 2521: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//; 2522: } 2523: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2524: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth; 2525: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2526: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2527: } else { 2528: $data=~s/^\s+(\S.*)/$1/; 2529: $data=~s/(.*\S)\s+$/$1/; 2530: $data=~s/(\s)+/$1/; 2531: my ($current_length,$min_length)=(0,0); 2532: if ($data=~/\\vskip/) { 2533: my $newdata=$data; 2534: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g; 2535: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata); 2536: foreach my $elementdata (@newdata) { 2537: my $lengthnewdata=2.5*&LATEX_length($elementdata); 2538: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;} 2539: my @words=split(/ /,$elementdata); 2540: foreach my $word (@words) { 2541: my $lengthword=2.5*&LATEX_length($word); 2542: if ($min_length<$lengthword) {$min_length=$lengthword;} 2543: } 2544: } 2545: } else { 2546: $current_length=2.5*&LATEX_length($data); 2547: my @words=split(/ /,$data); 2548: foreach my $word (@words) { 2549: my $lengthword=2*&LATEX_length($word); 2550: if ($min_length<$lengthword) {$min_length=$lengthword;} 2551: } 2552: } 2553: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2554: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0'; 2555: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length; 2556: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length; 2557: } 2558: } 2559: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) { 2560: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/; 2561: } 2562: #make data bold 2563: $data='\textbf{'.$data.'}'; 2564: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data; 2565: return''; 2566: } 2567: 2568: sub end_th { 2569: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2570: my $currentstring = &end_p(); # Close any open <p> in the row. 2571: if ($target eq 'web') { 2572: $currentstring .= $token->[2]; 2573: } elsif ($target eq 'tex') { 2574: $Apache::londefdef::TD_redirection =0; 2575: &end_th_tex($parstack,$parser,$safeeval); 2576: } 2577: return $currentstring; 2578: } 2579: 2580: #-- <img> tag (end tag forbidden) 2581: # 2582: # Render the <IMG> tag. 2583: # <IMG> has the following attributes (in addition to the 2584: # standard HTML ones: 2585: # TeXwrap - Governs how the tex target will try to wrap text around 2586: # horizontally aligned images. 2587: # TeXwidth - The width of the image when rendered for print (mm). 2588: # TeXheight - The height of the image when rendered for print (mm) 2589: # (Note there seems to also be support for this as a % of page size) 2590: # 2591: sub start_img { 2592: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_; 2593: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval, 2594: undef,1); 2595: if (not $src and ($target eq 'web' or $target eq 'tex')) { 2596: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style); 2597: return ''; 2598: } 2599: &Apache::lonxml::extlink($src); 2600: my $currentstring = ''; 2601: my $scaling = .3; 2602: 2603: # Render unto browsers that which are the browser's... 2604: 2605: if ($target eq 'web') { 2606: if ($env{'browser.imagesuppress'} ne 'on') { 2607: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src}); 2608: } else { 2609: my $alttag= &Apache::lonxml::get_param 2610: ('alt',$parstack,$safeeval,undef,1); 2611: unless ($alttag) { 2612: $alttag=&Apache::lonmeta::alttag 2613: ($Apache::lonxml::pwd[-1],$src); 2614: } 2615: $currentstring.='[IMAGE: '.$alttag.']'; 2616: } 2617: 2618: # and render unto TeX that which is LaTeX 2619: 2620: } elsif ($target eq 'tex') { 2621: # 2622: # The alignment will require some superstructure to be put around 2623: # the \includegraphics stuff. At present we can only partially 2624: # simulate the alignments offered by html. 2625: # 2626: # 2627: my $align = lc(&Apache::lonxml::get_param('align', 2628: $parstack, 2629: $safeeval, 2630: undef,1)); 2631: if(!$align) { 2632: if (&is_inside_of($tagstack, "table")) { 2633: $align = "right"; # Force wraptext use. 2634: } else { 2635: $align = "bottom"; # This is html's default so it's ours too. 2636: } 2637: } 2638: # 2639: &Apache::lonxml::debug("Alignemnt = $align"); 2640: # LaTeX's image/text wrapping is really bad since it wants to 2641: # make figures float. 2642: # The user has the optional parameter (applicable only to l/r 2643: # alignment to use the picins/parpic directive to get wrapped text 2644: # this is also imperfect.. that's why we give them a choice... 2645: # so they can't yell at us for our choice. 2646: # 2647: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap', 2648: $parstack, 2649: $safeeval, 2650: undef,0); 2651: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering"); 2652: if(!$latex_rendering) { 2653: $latex_rendering = "texwrap"; 2654: } 2655: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src"); 2656: 2657: #if original gif/jpg/png file exist do following: 2658: my $origsrc=$src; 2659: my ($path,$file) = &get_eps_image($src); 2660: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src); 2661: &Apache::lonxml::debug("path = $path file = $file src = $src"); 2662: if (-e $src) { 2663: &Apache::lonxml::debug("$src exists"); 2664: my ($height_param,$width_param)= 2665: &image_size($origsrc,0.3,$parstack,$safeeval); 2666: my $destpath = $path; 2667: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit. 2668: my $destfile = $file; 2669: $destfile =~ s/ /\_/g; 2670: my $size; 2671: if ($width_param) { $size.='width='.$width_param.' mm,'; } 2672: if ($height_param) { $size.='height='.$height_param.' mm]'; } 2673: $size='['.$size; 2674: $size=~s/,$/]/; 2675: $currentstring .= '\graphicspath{{'.$destpath.'}}' 2676: .'\includegraphics'.$size.'{'.$destfile.'} '; 2677: 2678: # If there's an alignment specification we need to honor it here. 2679: # For the horizontal alignments, we will also honor the 2680: # value of the latex specfication. The default is parbox, 2681: # and that's used for illegal values too. 2682: # 2683: # Even though we set a default alignment value, the user 2684: # could have given us an illegal value. In that case we 2685: # just use the default alignment of bottom.. 2686: if ($align eq "top") { 2687: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}'; 2688: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind 2689: my $offset = $height_param/2; 2690: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}'; 2691: } elsif ($align eq "left") { 2692: if ($latex_rendering eq "parpic") { 2693: $currentstring = '\parpic[l]{'.$currentstring.'}'; 2694: } else { # wrapfig render 2695: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}' 2696: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}'; 2697: } 2698: } elsif ($align eq "right") { 2699: if ($latex_rendering eq "parpic") { 2700: $currentstring = '\parpic[r]{'.$currentstring.'}'; 2701: } else { # wrapfig rendering 2702: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}' 2703: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}'; 2704: 2705: } 2706: } else { # Bottom is also default. 2707: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}'; 2708: } 2709: } else { 2710: &Apache::lonxml::debug("$src does not exist"); 2711: #original image file doesn't exist so check the alt attribute 2712: my $alt = 2713: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1); 2714: unless ($alt) { 2715: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src); 2716: } 2717: 2718: if ($alt) { $currentstring .= ' '.$alt.' '; } 2719: } 2720: 2721: # And here's where the semi-quote breaks down: allow the user 2722: # to edit the beast as well by rendering the problem for edit: 2723: } elsif ($target eq 'edit') { 2724: $currentstring .=&Apache::edit::tag_start($target,$token); 2725: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70). 2726: &Apache::edit::browse('src',undef,'alt').' '. 2727: &Apache::edit::search('src',undef,'alt').'<br />'; 2728: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />'; 2729: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5); 2730: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />'; 2731: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5); 2732: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5); 2733: $currentstring .=&Apache::edit::select_arg('Alignment:','align', 2734: ['','bottom','middle','top','left','right'],$token,5); 2735: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap', 2736: ['', 'parbox', 'parpic'], $token, 2); 2737: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row(); 2738: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval); 2739: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval); 2740: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval); 2741: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval); 2742: 2743: 2744: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" '; 2745: if ($width) { $currentstring.=' width="'.$width.'" '; } 2746: if ($height) { $currentstring.=' height="'.$height.'" '; } 2747: $currentstring .= ' />'; 2748: } elsif ($target eq 'modified') { 2749: my ($osrc,$owidth,$oheight)= 2750: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'}); 2751: my $ctag=&Apache::edit::get_new_args($token,$parstack, 2752: $safeeval,'src','alt','align', 2753: 'TeXwidth','TeXheight', 'TeXwrap', 2754: 'width','height'); 2755: my ($nsrc,$nwidth,$nheight)= 2756: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'}); 2757: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc); 2758: &image_replication($loc); 2759: my ($iwidth,$iheight); 2760: if (-e $loc) { 2761: my $image = Image::Magick->new; 2762: $image->Read($loc); 2763: ($iwidth, $iheight) = ($image->Get('width'), 2764: $image->Get('height')); 2765: } 2766: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) { 2767: # changed image or no size specified, 2768: # if they didn't explicitly change the 2769: # width or height use the ones from the image 2770: if ($iwidth && $iheight) { 2771: if ($owidth == $nwidth || (!$nwidth && !$nheight)) { 2772: $token->[2]{'width'} = $iwidth;$ctag=1; 2773: } 2774: if ($oheight == $nheight || (!$nwidth && !$nheight)) { 2775: $token->[2]{'height'}=$iheight;$ctag=1; 2776: } 2777: } 2778: } 2779: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'}); 2780: # if we don't have a width or height 2781: if ($iwidth && $cwidth && !$cheight) { 2782: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1; 2783: } 2784: if ($iheight && $cheight && !$cwidth) { 2785: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1; 2786: } 2787: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);} 2788: } 2789: 2790: return $currentstring; 2791: } 2792: 2793: sub end_img { 2794: my ($target,$token) = @_; 2795: my $currentstring = ''; 2796: if ($target eq 'web') { 2797: $currentstring = $token->[2]; 2798: } elsif ($target eq 'tex') { 2799: $currentstring = ''; 2800: } 2801: return $currentstring; 2802: } 2803: 2804: #-- <applet> tag (end tag required) 2805: sub start_applet { 2806: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2807: 2808: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1); 2809: &Apache::lonxml::extlink($code); 2810: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval, 2811: undef,1); 2812: &Apache::lonxml::extlink($archive); 2813: my $currentstring = ''; 2814: if ($target eq 'web') { 2815: if ($env{'browser.appletsuppress'} ne 'on') { 2816: $currentstring = &Apache::lonenc::encrypt_ref($token, 2817: {'code'=>$code, 2818: 'archive'=>$archive} 2819: ); 2820: } else { 2821: my $alttag= &Apache::lonxml::get_param('alt',$parstack, 2822: $safeeval,undef,1); 2823: unless ($alttag) { 2824: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1], 2825: $code); 2826: } 2827: $currentstring='[APPLET: '.$alttag.']'; 2828: } 2829: } elsif ($target eq 'tex') { 2830: my $alttag= &Apache::lonxml::get_param('alt',$parstack, 2831: $safeeval,undef,1); 2832: unless ($alttag) { 2833: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval, 2834: undef,1); 2835: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1], 2836: $code); 2837: } 2838: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag. 2839: '.}\end{center}'; 2840: } 2841: return $currentstring; 2842: } 2843: 2844: sub end_applet { 2845: my ($target,$token) = @_; 2846: my $currentstring = ''; 2847: if ($target eq 'web') { 2848: $currentstring = $token->[2]; 2849: } elsif ($target eq 'tex') { 2850: } 2851: return $currentstring; 2852: } 2853: 2854: #-- <embed> tag (end tag optional/required) 2855: sub start_embed { 2856: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2857: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1); 2858: &Apache::lonxml::extlink($src); 2859: my $currentstring = ''; 2860: if ($target eq 'web') { 2861: if ($env{'browser.embedsuppress'} ne 'on') { 2862: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src}); 2863: } else { 2864: my $alttag=&Apache::lonxml::get_param 2865: ('alt',$parstack,$safeeval,undef,1); 2866: unless ($alttag) { 2867: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src); 2868: } 2869: $currentstring='[EMBED: '.$alttag.']'; 2870: } 2871: } elsif ($target eq 'tex') { 2872: } 2873: return $currentstring; 2874: } 2875: 2876: sub end_embed { 2877: my ($target,$token) = @_; 2878: my $currentstring = ''; 2879: if ($target eq 'web') { 2880: $currentstring = $token->[2]; 2881: } elsif ($target eq 'tex') { 2882: } 2883: return $currentstring; 2884: } 2885: 2886: #-- <param> tag (end tag forbidden) 2887: sub start_param { 2888: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2889: if (&Apache::lonxml::get_param('name',$parstack, 2890: $safeeval,undef,1)=~/^cabbase$/i) { 2891: my $value=&Apache::lonxml::get_param('value',$parstack, 2892: $safeeval,undef,1); 2893: &Apache::lonxml::extlink($value); 2894: } 2895: 2896: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1); 2897: &Apache::lonxml::extlink($src); 2898: my $currentstring = ''; 2899: if ($target eq 'web') { 2900: my %toconvert; 2901: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1); 2902: if ($src) { $toconvert{'src'}= $src; } 2903: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval, 2904: undef,1); 2905: if ($name=~/^cabbase$/i) { 2906: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack, 2907: $safeeval,undef,1); 2908: } 2909: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert); 2910: } elsif ($target eq 'tex') { 2911: } 2912: return $currentstring; 2913: } 2914: 2915: sub end_param { 2916: my ($target,$token) = @_; 2917: my $currentstring = ''; 2918: if ($target eq 'web') { 2919: $currentstring = $token->[2]; 2920: } elsif ($target eq 'tex') { 2921: } 2922: return $currentstring; 2923: } 2924: 2925: #-- <allow> tag 2926: sub start_allow { 2927: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2928: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1); 2929: &Apache::lonxml::extlink($src); 2930: 2931: if ($target eq 'tex') { &image_replication($src); } 2932: my $result; 2933: if ($target eq 'edit') { 2934: $result .=&Apache::edit::tag_start($target,$token); 2935: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70); 2936: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row(); 2937: } elsif ($target eq 'modified') { 2938: my $constructtag=&Apache::edit::get_new_args($token,$parstack, 2939: $safeeval,'src'); 2940: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); } 2941: } 2942: return $result; 2943: } 2944: 2945: sub end_allow { 2946: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 2947: if ( $target eq 'edit') { return (&Apache::edit::end_table()); } 2948: return ''; 2949: } 2950: 2951: #-- Frames (end tag required) 2952: #-- <frameset> 2953: sub start_frameset { 2954: my ($target,$token) = @_; 2955: my $currentstring = ''; # Close any pending para. 2956: if ($target eq 'web') { 2957: if (!$Apache::lonxml::registered && 2958: $env{'request.state'} eq 'published') { 2959: $currentstring.='<head>'. 2960: &Apache::lonmenu::registerurl(undef,$target).'</head>'; 2961: } 2962: my $onLoad=''; 2963: foreach my $key (keys(%{$token->[2]})) { 2964: if ($key =~ /^onload$/i) { 2965: $onLoad.=$token->[2]->{$key}.';'; 2966: delete($token->[2]->{$key}); 2967: } 2968: } 2969: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad; 2970: my $onUnload=''; 2971: foreach my $key (keys(%{$token->[2]})) { 2972: if ($key =~ /^onunload$/i) { 2973: $onUnload.=$token->[2]->{$key}.';'; 2974: delete($token->[2]->{$key}); 2975: } 2976: } 2977: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents(). 2978: ';'.$onUnload; 2979: 2980: $currentstring .= '<'.$token->[1]; 2981: foreach (keys %{$token->[2]}) { 2982: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"'; 2983: } 2984: $currentstring.='>'; 2985: } 2986: return $currentstring; 2987: } 2988: 2989: sub end_frameset { 2990: my ($target,$token) = @_; 2991: my $currentstring = ''; 2992: if ($target eq 'web') { 2993: $currentstring = $token->[2]; 2994: } 2995: return $currentstring; 2996: } 2997: 2998: #-- <xmp> (end tag required) 2999: sub start_xmp { 3000: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 3001: my $currentstring = ''; 3002: if ($target eq 'web') { 3003: $currentstring .= $token->[4]; 3004: } elsif ($target eq 'tex') { 3005: $currentstring .= '\begin{verbatim}'; 3006: } 3007: return $currentstring; 3008: } 3009: 3010: sub end_xmp { 3011: my ($target,$token) = @_; 3012: my $currentstring = ''; 3013: if ($target eq 'web') { 3014: $currentstring .= $token->[2]; 3015: } elsif ($target eq 'tex') { 3016: $currentstring .= '\end{verbatim}'; 3017: } 3018: return $currentstring; 3019: } 3020: 3021: #-- <pre> (end tag required) 3022: sub start_pre { 3023: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 3024: my $currentstring = &end_p(); # close off pending <p> 3025: if ($target eq 'web') { 3026: $currentstring .= $token->[4]; 3027: } elsif ($target eq 'tex') { 3028: $currentstring .= '\begin{verbatim}'; 3029: } 3030: return $currentstring; 3031: } 3032: 3033: sub end_pre { 3034: my ($target,$token) = @_; 3035: my $currentstring = ''; 3036: if ($target eq 'web') { 3037: $currentstring .= $token->[2]; 3038: } elsif ($target eq 'tex') { 3039: $currentstring .= '\end{verbatim}'; 3040: } 3041: return $currentstring; 3042: } 3043: 3044: #-- <insert> 3045: sub start_insert { 3046: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 3047: my $currentstring = ''; 3048: if ($target eq 'web') { 3049: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1); 3050: $currentstring .= '<b>'.$display.'</b>';; 3051: } 3052: return $currentstring; 3053: } 3054: 3055: sub end_insert { 3056: my ($target,$token) = @_; 3057: my $currentstring = ''; 3058: if ($target eq 'web') { 3059: $currentstring .= ''; 3060: } 3061: return $currentstring; 3062: } 3063: 3064: #-- <externallink> 3065: sub start_externallink { 3066: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 3067: my $currentstring = ''; 3068: if ($target eq 'web') { 3069: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1); 3070: $currentstring .= '<b>'.$display.'</b>';; 3071: } 3072: return $currentstring; 3073: } 3074: 3075: sub end_externallink { 3076: my ($target,$token) = @_; 3077: my $currentstring = ''; 3078: if ($target eq 'web') { 3079: $currentstring .= ''; 3080: } 3081: return $currentstring; 3082: } 3083: 3084: #-- <blankspace heigth=""> 3085: sub start_blankspace { 3086: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 3087: my $currentstring = &end_p(); # closes off any unclosed <p> 3088: if ($target eq 'tex') { 3089: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1); 3090: $currentstring .= '\vskip '.$howmuch.' '; 3091: } 3092: return $currentstring; 3093: } 3094: 3095: sub end_blankspace { 3096: my ($target,$token) = @_; 3097: my $currentstring = ''; 3098: if ($target eq 'tex') { 3099: $currentstring .= ''; 3100: } 3101: return $currentstring; 3102: } 3103: 3104: #-- <abbr> tag (end tag required) 3105: sub start_abbr { 3106: my ($target,$token) = @_; 3107: my $currentstring = ''; 3108: if ($target eq 'web') { 3109: $currentstring = $token->[4]; 3110: } 3111: return $currentstring; 3112: } 3113: 3114: sub end_abbr { 3115: my ($target,$token) = @_; 3116: my $currentstring = ''; 3117: if ($target eq 'web') { 3118: $currentstring = $token->[2]; 3119: } 3120: return $currentstring; 3121: } 3122: 3123: #-- <acronym> tag (end tag required) 3124: sub start_acronym { 3125: my ($target,$token) = @_; 3126: my $currentstring = ''; 3127: if ($target eq 'web') { 3128: $currentstring = $token->[4]; 3129: } 3130: return $currentstring; 3131: } 3132: 3133: sub end_acronym { 3134: my ($target,$token) = @_; 3135: my $currentstring = ''; 3136: if ($target eq 'web') { 3137: $currentstring = $token->[2]; 3138: } 3139: return $currentstring; 3140: } 3141: 3142: #-- <area> tag (end tag forbidden) 3143: sub start_area { 3144: my ($target,$token) = @_; 3145: my $currentstring = ''; 3146: if ($target eq 'web') { 3147: $currentstring = $token->[4]; 3148: } 3149: return $currentstring; 3150: } 3151: 3152: sub end_area { 3153: my ($target,$token) = @_; 3154: my $currentstring = ''; 3155: if ($target eq 'web') { 3156: $currentstring = $token->[2]; 3157: } 3158: return $currentstring; 3159: } 3160: 3161: #-- <base> tag (end tag forbidden) 3162: sub start_base { 3163: my ($target,$token) = @_; 3164: my $currentstring = ''; 3165: if ($target eq 'web') { 3166: $currentstring = $token->[4]; 3167: } 3168: return $currentstring; 3169: } 3170: 3171: sub end_base { 3172: my ($target,$token) = @_; 3173: my $currentstring = ''; 3174: if ($target eq 'web') { 3175: $currentstring = $token->[2]; 3176: } 3177: return $currentstring; 3178: } 3179: 3180: #-- <bdo> tag (end tag required) 3181: sub start_bdo { 3182: my ($target,$token) = @_; 3183: my $currentstring = ''; 3184: if ($target eq 'web') { 3185: $currentstring = $token->[4]; 3186: } 3187: return $currentstring; 3188: } 3189: 3190: sub end_bdo { 3191: my ($target,$token) = @_; 3192: my $currentstring = ''; 3193: if ($target eq 'web') { 3194: $currentstring = $token->[2]; 3195: } 3196: return $currentstring; 3197: } 3198: 3199: #-- <bgsound> tag (end tag optional) 3200: sub start_bgsound { 3201: my ($target,$token) = @_; 3202: my $currentstring = ''; 3203: if ($target eq 'web') { 3204: $currentstring = $token->[4]; 3205: } 3206: return $currentstring; 3207: } 3208: 3209: sub end_bgsound { 3210: my ($target,$token) = @_; 3211: my $currentstring = ''; 3212: if ($target eq 'web') { 3213: $currentstring = $token->[2]; 3214: } 3215: return $currentstring; 3216: } 3217: 3218: #-- <blink> tag (end tag required) 3219: sub start_blink { 3220: my ($target,$token) = @_; 3221: my $currentstring = ''; 3222: if ($target eq 'web') { 3223: $currentstring = $token->[4]; 3224: } 3225: return $currentstring; 3226: } 3227: 3228: sub end_blink { 3229: my ($target,$token) = @_; 3230: my $currentstring = ''; 3231: if ($target eq 'web') { 3232: $currentstring = $token->[2]; 3233: } 3234: return $currentstring; 3235: } 3236: 3237: #-- <blockquote> tag (end tag required) 3238: sub start_blockquote { 3239: my ($target,$token) = @_; 3240: my $currentstring = &end_p(); # Close any unclosed <p> 3241: if ($target eq 'web') { 3242: $currentstring .= $token->[4]; 3243: } 3244: return $currentstring; 3245: } 3246: 3247: sub end_blockquote { 3248: my ($target,$token) = @_; 3249: my $currentstring = ''; 3250: if ($target eq 'web') { 3251: $currentstring = $token->[2]; 3252: } 3253: return $currentstring; 3254: } 3255: 3256: #-- <button> tag (end tag required) 3257: sub start_button { 3258: my ($target,$token) = @_; 3259: my $currentstring = ''; 3260: if ($target eq 'web') { 3261: $currentstring = $token->[4]; 3262: } 3263: return $currentstring; 3264: } 3265: 3266: sub end_button { 3267: my ($target,$token) = @_; 3268: my $currentstring = ''; 3269: if ($target eq 'web') { 3270: $currentstring = $token->[2]; 3271: } 3272: return $currentstring; 3273: } 3274: 3275: #-- <caption> tag (end tag required) 3276: sub start_caption { 3277: my ($target,$token) = @_; 3278: my $currentstring = ''; 3279: if ($target eq 'web') { 3280: $currentstring = $token->[4]; 3281: } 3282: return $currentstring; 3283: } 3284: 3285: sub end_caption { 3286: my ($target,$token) = @_; 3287: my $currentstring = ''; 3288: if ($target eq 'web') { 3289: $currentstring = $token->[2]; 3290: } 3291: return $currentstring; 3292: } 3293: 3294: #-- <col> tag (end tag forbdden) 3295: sub start_col { 3296: my ($target,$token) = @_; 3297: my $currentstring = ''; 3298: if ($target eq 'web') { 3299: $currentstring = $token->[4]; 3300: } 3301: return $currentstring; 3302: } 3303: 3304: sub end_col { 3305: my ($target,$token) = @_; 3306: my $currentstring = ''; 3307: if ($target eq 'web') { 3308: $currentstring = $token->[2]; 3309: } 3310: return $currentstring; 3311: } 3312: 3313: #-- <colgroup> tag (end tag optional) 3314: sub start_colgroup { 3315: my ($target,$token) = @_; 3316: my $currentstring = ''; 3317: if ($target eq 'web') { 3318: $currentstring = $token->[4]; 3319: } 3320: return $currentstring; 3321: } 3322: 3323: sub end_colgroup { 3324: my ($target,$token) = @_; 3325: my $currentstring = ''; 3326: if ($target eq 'web') { 3327: $currentstring = $token->[2]; 3328: } 3329: return $currentstring; 3330: } 3331: 3332: #-- <del> tag (end tag required) 3333: sub start_del { 3334: my ($target,$token) = @_; 3335: my $currentstring = ''; 3336: if ($target eq 'web') { 3337: $currentstring = $token->[4]; 3338: } 3339: return $currentstring; 3340: } 3341: 3342: sub end_del { 3343: my ($target,$token) = @_; 3344: my $currentstring = ''; 3345: if ($target eq 'web') { 3346: $currentstring = $token->[2]; 3347: } 3348: return $currentstring; 3349: } 3350: 3351: #-- <fieldset> tag (end tag required) 3352: sub start_fieldset { 3353: my ($target,$token) = @_; 3354: my $currentstring = ''; 3355: if ($target eq 'web') { 3356: $currentstring = $token->[4]; 3357: } 3358: return $currentstring; 3359: } 3360: 3361: sub end_fieldset { 3362: my ($target,$token) = @_; 3363: my $currentstring = ''; 3364: if ($target eq 'web') { 3365: $currentstring = $token->[2]; 3366: } 3367: return $currentstring; 3368: } 3369: 3370: #-- <frame> tag (end tag forbidden) 3371: sub start_frame { 3372: my ($target,$token) = @_; 3373: my $currentstring = ''; 3374: if ($target eq 'web') { 3375: $currentstring = $token->[4]; 3376: } 3377: return $currentstring; 3378: } 3379: 3380: sub end_frame { 3381: my ($target,$token) = @_; 3382: my $currentstring = ''; 3383: if ($target eq 'web') { 3384: $currentstring = $token->[2]; 3385: } 3386: return $currentstring; 3387: } 3388: 3389: #-- <iframe> tag (end tag required) 3390: sub start_iframe { 3391: my ($target,$token) = @_; 3392: my $currentstring = ''; 3393: if ($target eq 'web') { 3394: $currentstring = $token->[4]; 3395: } 3396: return $currentstring; 3397: } 3398: 3399: sub end_iframe { 3400: my ($target,$token) = @_; 3401: my $currentstring = ''; 3402: if ($target eq 'web') { 3403: $currentstring = $token->[2]; 3404: } 3405: return $currentstring; 3406: } 3407: 3408: #-- <ins> tag (end tag required) 3409: sub start_ins { 3410: my ($target,$token) = @_; 3411: my $currentstring = ''; 3412: if ($target eq 'web') { 3413: $currentstring = $token->[4]; 3414: } 3415: return $currentstring; 3416: } 3417: 3418: sub end_ins { 3419: my ($target,$token) = @_; 3420: my $currentstring = ''; 3421: if ($target eq 'web') { 3422: $currentstring = $token->[2]; 3423: } 3424: return $currentstring; 3425: } 3426: 3427: #-- <isindex> tag (end tag forbidden) 3428: sub start_isindex { 3429: my ($target,$token) = @_; 3430: my $currentstring = ''; 3431: if ($target eq 'web') { 3432: $currentstring = $token->[4]; 3433: } 3434: return $currentstring; 3435: } 3436: 3437: sub end_isindex { 3438: my ($target,$token) = @_; 3439: my $currentstring = ''; 3440: if ($target eq 'web') { 3441: $currentstring = $token->[2]; 3442: } 3443: return $currentstring; 3444: } 3445: 3446: #-- <keygen> tag (end tag forbidden) 3447: sub start_keygen { 3448: my ($target,$token) = @_; 3449: my $currentstring = ''; 3450: if ($target eq 'web') { 3451: $currentstring = $token->[4]; 3452: } 3453: return $currentstring; 3454: } 3455: 3456: sub end_keygen { 3457: my ($target,$token) = @_; 3458: my $currentstring = ''; 3459: if ($target eq 'web') { 3460: $currentstring = $token->[2]; 3461: } 3462: return $currentstring; 3463: } 3464: 3465: #-- <label> tag 3466: sub start_label { 3467: my ($target,$token) = @_; 3468: my $currentstring = ''; 3469: if ($target eq 'web') { 3470: $currentstring = $token->[4]; 3471: } 3472: return $currentstring; 3473: } 3474: 3475: sub end_label { 3476: my ($target,$token) = @_; 3477: my $currentstring = ''; 3478: if ($target eq 'web') { 3479: $currentstring = $token->[2]; 3480: } 3481: return $currentstring; 3482: } 3483: 3484: #-- <layer> tag (end tag required) 3485: sub start_layer { 3486: my ($target,$token) = @_; 3487: my $currentstring = ''; 3488: if ($target eq 'web') { 3489: $currentstring = $token->[4]; 3490: } 3491: return $currentstring; 3492: } 3493: 3494: sub end_layer { 3495: my ($target,$token) = @_; 3496: my $currentstring = ''; 3497: if ($target eq 'web') { 3498: $currentstring = $token->[2]; 3499: } 3500: return $currentstring; 3501: } 3502: 3503: #-- <legend> tag (end tag required) 3504: sub start_legend { 3505: my ($target,$token) = @_; 3506: my $currentstring = ''; 3507: if ($target eq 'web') { 3508: $currentstring = $token->[4]; 3509: } 3510: return $currentstring; 3511: } 3512: 3513: sub end_legend { 3514: my ($target,$token) = @_; 3515: my $currentstring = ''; 3516: if ($target eq 'web') { 3517: $currentstring = $token->[2]; 3518: } 3519: return $currentstring; 3520: } 3521: 3522: #-- <link> tag (end tag forbidden) 3523: sub start_link { 3524: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_; 3525: my $currentstring = ''; 3526: if ($target eq 'web') { 3527: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval, 3528: undef,1); 3529: &Apache::lonxml::extlink($href); 3530: $currentstring = $token->[4]; 3531: } 3532: return $currentstring; 3533: } 3534: 3535: sub end_link { 3536: my ($target,$token) = @_; 3537: my $currentstring = ''; 3538: if ($target eq 'web') { 3539: $currentstring = $token->[2]; 3540: } 3541: return $currentstring; 3542: } 3543: 3544: #-- <marquee> tag (end tag optional) 3545: sub start_marquee { 3546: my ($target,$token) = @_; 3547: my $currentstring = ''; 3548: if ($target eq 'web') { 3549: $currentstring = $token->[4]; 3550: } 3551: return $currentstring; 3552: } 3553: 3554: sub end_marquee { 3555: my ($target,$token) = @_; 3556: my $currentstring = ''; 3557: if ($target eq 'web') { 3558: $currentstring = $token->[2]; 3559: } 3560: return $currentstring; 3561: } 3562: 3563: #-- <multicol> tag (end tag required) 3564: sub start_multicol { 3565: my ($target,$token) = @_; 3566: my $currentstring = &end_p(); # Close any pending <p> 3567: if ($target eq 'web') { 3568: $currentstring .= $token->[4]; 3569: } 3570: return $currentstring; 3571: } 3572: 3573: sub end_multicol { 3574: my ($target,$token) = @_; 3575: my $currentstring = ''; 3576: if ($target eq 'web') { 3577: $currentstring = $token->[2]; 3578: } 3579: return $currentstring; 3580: } 3581: 3582: #-- <nobr> tag (end tag required) 3583: sub start_nobr { 3584: my ($target,$token) = @_; 3585: my $currentstring = ''; 3586: if ($target eq 'web') { 3587: $currentstring = $token->[4]; 3588: } elsif ($target eq 'tex') { 3589: $currentstring='\mbox{'; 3590: } 3591: return $currentstring; 3592: } 3593: 3594: sub end_nobr { 3595: my ($target,$token) = @_; 3596: my $currentstring = ''; 3597: if ($target eq 'web') { 3598: $currentstring = $token->[2]; 3599: } elsif ($target eq 'tex') { 3600: $currentstring='}'; 3601: } 3602: return $currentstring; 3603: } 3604: 3605: #-- <noembed> tag (end tag required) 3606: sub start_noembed { 3607: my ($target,$token) = @_; 3608: my $currentstring = ''; 3609: if ($target eq 'web') { 3610: $currentstring = $token->[4]; 3611: } 3612: return $currentstring; 3613: } 3614: 3615: sub end_noembed { 3616: my ($target,$token) = @_; 3617: my $currentstring = ''; 3618: if ($target eq 'web') { 3619: $currentstring = $token->[2]; 3620: } 3621: return $currentstring; 3622: } 3623: 3624: #-- <noframes> tag (end tag required) 3625: sub start_noframes { 3626: my ($target,$token) = @_; 3627: my $currentstring = ''; 3628: if ($target eq 'web') { 3629: $currentstring = $token->[4]; 3630: } 3631: return $currentstring; 3632: } 3633: 3634: sub end_noframes { 3635: my ($target,$token) = @_; 3636: my $currentstring = ''; 3637: if ($target eq 'web') { 3638: $currentstring = $token->[2]; 3639: } 3640: return $currentstring; 3641: } 3642: 3643: #-- <nolayer> tag (end tag required) 3644: sub start_nolayer { 3645: my ($target,$token) = @_; 3646: my $currentstring = ''; 3647: if ($target eq 'web') { 3648: $currentstring = $token->[4]; 3649: } 3650: return $currentstring; 3651: } 3652: 3653: sub end_nolayer { 3654: my ($target,$token) = @_; 3655: my $currentstring = ''; 3656: if ($target eq 'web') { 3657: $currentstring = $token->[2]; 3658: } 3659: return $currentstring; 3660: } 3661: 3662: #-- <noscript> tag (end tag required) 3663: sub start_noscript { 3664: my ($target,$token) = @_; 3665: my $currentstring = ''; 3666: if ($target eq 'web') { 3667: $currentstring = $token->[4]; 3668: } 3669: return $currentstring; 3670: } 3671: 3672: sub end_noscript { 3673: my ($target,$token) = @_; 3674: my $currentstring = ''; 3675: if ($target eq 'web') { 3676: $currentstring = $token->[2]; 3677: } 3678: return $currentstring; 3679: } 3680: 3681: #-- <object> tag (end tag required) 3682: sub start_object { 3683: my ($target,$token) = @_; 3684: my $currentstring = ''; 3685: if ($target eq 'web') { 3686: $currentstring = $token->[4]; 3687: } 3688: return $currentstring; 3689: } 3690: 3691: sub end_object { 3692: my ($target,$token) = @_; 3693: my $currentstring = ''; 3694: if ($target eq 'web') { 3695: $currentstring = $token->[2]; 3696: } 3697: return $currentstring; 3698: } 3699: 3700: #-- <optgroup> tag (end tag required) 3701: sub start_optgroup { 3702: my ($target,$token) = @_; 3703: my $currentstring = ''; 3704: if ($target eq 'web') { 3705: $currentstring = $token->[4]; 3706: } 3707: return $currentstring; 3708: } 3709: 3710: sub end_optgroup { 3711: my ($target,$token) = @_; 3712: my $currentstring = ''; 3713: if ($target eq 'web') { 3714: $currentstring = $token->[2]; 3715: } 3716: return $currentstring; 3717: } 3718: 3719: #-- <samp> tag (end tag required) 3720: sub start_samp { 3721: my ($target,$token) = @_; 3722: my $currentstring = ''; 3723: if ($target eq 'web') { 3724: $currentstring = $token->[4]; 3725: } elsif ($target eq 'tex') { 3726: $currentstring='\texttt{'; 3727: } 3728: return $currentstring; 3729: } 3730: 3731: sub end_samp { 3732: my ($target,$token) = @_; 3733: my $currentstring = ''; 3734: if ($target eq 'web') { 3735: $currentstring = $token->[2]; 3736: } elsif ($target eq 'tex') { 3737: $currentstring='}'; 3738: } 3739: return $currentstring; 3740: } 3741: 3742: #-- <server> tag 3743: sub start_server { 3744: my ($target,$token) = @_; 3745: my $currentstring = ''; 3746: if ($target eq 'web') { 3747: $currentstring = $token->[4]; 3748: } 3749: return $currentstring; 3750: } 3751: 3752: sub end_server { 3753: my ($target,$token) = @_; 3754: my $currentstring = ''; 3755: if ($target eq 'web') { 3756: $currentstring = $token->[2]; 3757: } 3758: return $currentstring; 3759: } 3760: 3761: #-- <spacer> tag (end tag forbidden) 3762: sub start_spacer { 3763: my ($target,$token) = @_; 3764: my $currentstring = &end_p(); # Close off any open <p> tag. 3765: if ($target eq 'web') { 3766: $currentstring .= $token->[4]; 3767: } 3768: return $currentstring; 3769: } 3770: 3771: sub end_spacer { 3772: my ($target,$token) = @_; 3773: my $currentstring = ''; 3774: if ($target eq 'web') { 3775: $currentstring = $token->[2]; 3776: } 3777: return $currentstring; 3778: } 3779: 3780: #-- <span> tag (end tag required) 3781: sub start_span { 3782: my ($target,$token) = @_; 3783: my $currentstring = ''; 3784: if ($target eq 'web') { 3785: $currentstring = $token->[4]; 3786: } 3787: return $currentstring; 3788: } 3789: 3790: sub end_span { 3791: my ($target,$token) = @_; 3792: my $currentstring = ''; 3793: if ($target eq 'web') { 3794: $currentstring = $token->[2]; 3795: } 3796: return $currentstring; 3797: } 3798: 3799: #-- <tbody> tag (end tag optional) 3800: sub start_tbody { 3801: my ($target,$token) = @_; 3802: my $currentstring = ''; 3803: if ($target eq 'web') { 3804: $currentstring = $token->[4]; 3805: } 3806: return $currentstring; 3807: } 3808: 3809: sub end_tbody { 3810: my ($target,$token) = @_; 3811: my $currentstring = ''; 3812: if ($target eq 'web') { 3813: $currentstring = $token->[2]; 3814: } 3815: return $currentstring; 3816: } 3817: 3818: #-- <tfoot> tag (end tag optional) 3819: sub start_tfoot { 3820: my ($target,$token) = @_; 3821: my $currentstring = ''; 3822: if ($target eq 'web') { 3823: $currentstring = $token->[4]; 3824: } 3825: return $currentstring; 3826: } 3827: 3828: sub end_tfoot { 3829: my ($target,$token) = @_; 3830: my $currentstring = ''; 3831: if ($target eq 'web') { 3832: $currentstring = $token->[2]; 3833: } 3834: return $currentstring; 3835: } 3836: 3837: #-- <thead> tag (end tag optional) 3838: sub start_thead { 3839: my ($target,$token) = @_; 3840: my $currentstring = ''; 3841: if ($target eq 'web') { 3842: $currentstring = $token->[4]; 3843: } 3844: return $currentstring; 3845: } 3846: 3847: sub end_thead { 3848: my ($target,$token) = @_; 3849: my $currentstring = ''; 3850: if ($target eq 'web') { 3851: $currentstring = $token->[2]; 3852: } 3853: return $currentstring; 3854: } 3855: 3856: #-- <var> tag 3857: sub start_var { 3858: my ($target,$token) = @_; 3859: my $currentstring = ''; 3860: if ($target eq 'web') { 3861: $currentstring = $token->[4]; 3862: } elsif ($target eq 'tex') { 3863: $currentstring = '\textit{'; 3864: } 3865: return $currentstring; 3866: } 3867: 3868: sub end_var { 3869: my ($target,$token) = @_; 3870: my $currentstring = ''; 3871: if ($target eq 'web') { 3872: $currentstring = $token->[2]; 3873: } elsif ($target eq 'tex') { 3874: $currentstring = '}'; 3875: } 3876: return $currentstring; 3877: } 3878: 3879: #-- <wbr> tag (end tag forbidden) 3880: sub start_wbr { 3881: my ($target,$token) = @_; 3882: my $currentstring = ''; 3883: if ($target eq 'web') { 3884: $currentstring = $token->[4]; 3885: } 3886: return $currentstring; 3887: } 3888: 3889: sub end_wbr { 3890: my ($target,$token) = @_; 3891: my $currentstring = ''; 3892: if ($target eq 'web') { 3893: $currentstring = $token->[2]; 3894: } 3895: return $currentstring; 3896: } 3897: 3898: #-- <hideweboutput> tag 3899: sub start_hideweboutput { 3900: my ($target,$token) = @_; 3901: if ($target eq 'web') { 3902: &Apache::lonxml::startredirection(); 3903: } 3904: return ''; 3905: } 3906: 3907: sub end_hideweboutput { 3908: my ($target,$token) = @_; 3909: my $currentstring = ''; 3910: if ($target eq 'web') { 3911: $currentstring = &Apache::lonxml::endredirection(); 3912: } 3913: return ''; 3914: } 3915: 3916: 3917: sub image_replication { 3918: my $src = shift; 3919: if (not -e $src) { &Apache::lonnet::repcopy($src); } 3920: #replicates eps or ps 3921: my $epssrc = my $pssrc = $src; 3922: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i; 3923: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i; 3924: if (not -e $epssrc && not -e $pssrc) { 3925: my $result=&Apache::lonnet::repcopy($epssrc); 3926: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); } 3927: } 3928: return ''; 3929: } 3930: # 3931: # Get correct sizing parameter for an image given 3932: # it's initial ht. and wid. This allows sizing of 3933: # images that are generated on-the-fly (e.g. gnuplot) 3934: # as well as serving as a utility for image_size. 3935: # 3936: # Parameter: 3937: # height_param 3938: # width_param - Initial picture dimensions. 3939: # scaling - A scale factor. 3940: # parstack, - the current stack of tag attributes 3941: # from the xml parser 3942: # safeeval, - pointer to the safespace 3943: # depth, - from what level in the stack to look for attributes 3944: # (assumes -1 if unspecified) 3945: # cis - look for attrubutes case insensitively 3946: # (assumes false) 3947: # 3948: # Returns: 3949: # height, width - new dimensions. 3950: # 3951: sub resize_image { 3952: my ($height_param, $width_param, $scaling, 3953: $parstack, $safeeval, $depth, $cis) = @_; 3954: 3955: # First apply the scaling... 3956: 3957: $height_param = $height_param * $scaling; 3958: $width_param = $width_param * $scaling; 3959: 3960: #do we have any specified LaTeX size of the picture? 3961: my $toget='TeXwidth'; 3962: if ($cis) { 3963: $toget=lc($toget); 3964: } 3965: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack, 3966: $safeeval,$depth,$cis); 3967: $toget='TeXheight'; if ($cis) { $toget=lc($toget); } 3968: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack, 3969: $safeeval,$depth,$cis); 3970: #do we have any specified web size of the picture? 3971: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval, 3972: $depth,1); 3973: if ($TeXwidth) { 3974: my $old_width_param=$width_param; 3975: if ($TeXwidth=~/(\d+)\s*\%/) { 3976: $width_param = $1*$env{'form.textwidth'}/100; 3977: } else { 3978: $width_param = $TeXwidth; 3979: } 3980: if ($TeXheight) { 3981: $height_param = $TeXheight; 3982: } elsif ($old_width_param) { 3983: $height_param=$TeXwidth/$old_width_param*$height_param; 3984: } 3985: } elsif ($TeXheight) { 3986: $height_param = $TeXheight; 3987: if ($height_param) { 3988: $width_param = $TeXheight/$height_param*$width_param; 3989: } 3990: } elsif ($width) { 3991: my $old_width_param=$width_param; 3992: $width_param = $width*$scaling; 3993: if ($old_width_param) { 3994: $height_param=$width_param/$old_width_param*$height_param; 3995: } 3996: } 3997: if ($width_param > $env{'form.textwidth'}) { 3998: my $old_width_param=$width_param; 3999: $width_param =0.95*$env{'form.textwidth'}; 4000: if ($old_width_param) { 4001: $height_param=$width_param/$old_width_param*$height_param; 4002: } 4003: } 4004: 4005: return ($height_param, $width_param); 4006: } 4007: 4008: sub image_size { 4009: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_; 4010: 4011: #size of image from gif/jpg/jpeg/png 4012: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src); 4013: if (-e $ressrc) { 4014: $src = $ressrc; 4015: } 4016: my $image = Image::Magick->new; 4017: my $current_figure = $image->Read($src); 4018: my $width_param = $image->Get('width'); 4019: my $height_param = $image->Get('height'); 4020: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param"); 4021: undef($image); 4022: 4023: ($height_param, $width_param) = &resize_image($height_param, $width_param, 4024: $scaling, $parstack, $safeeval, 4025: $depth, $cis); 4026: 4027: return ($height_param, $width_param); 4028: } 4029: 4030: sub image_width { 4031: my ($height, $width) = &image_size(@_); 4032: return $width; 4033: } 4034: # Not yet 100% sure this is correct in all circumstances.. 4035: # due to my uncertainty about mods to image_size. 4036: # 4037: sub image_height { 4038: my ($height, $width) = &image_size(@_); 4039: return $height; 4040: } 4041: 4042: sub get_eps_image { 4043: my ($src)=@_; 4044: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src); 4045: 4046: # In order to prevent the substitution of the alt text, we need to 4047: # be sure the orig_src file is on system now so: 4048: 4049: if (! -e $orig_src) { 4050: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal. 4051: } 4052: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src"); 4053: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i); 4054: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i; 4055: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src); 4056: &Apache::lonxml::debug("Filelocation gives: $src"); 4057: if (! -e $src) { 4058: &Apache::lonxml::debug("$src does not exist"); 4059: if (&Apache::lonnet::repcopy($src) ne 'ok' ) { 4060: &Apache::lonxml::debug("Repcopy of $src failed (1)"); 4061: #if replication failed try to find ps file 4062: $src=~s/\.eps$/\.ps/; 4063: &Apache::lonxml::debug("Now looking for $src"); 4064: #if no ps file try to replicate it. 4065: my $didrepcopy = &Apache::lonnet::repcopy($src); 4066: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy"); 4067: if ( (not -e $src) || 4068: ($didrepcopy ne 'ok')) { 4069: &Apache::lonxml::debug("Failed to find or replicate $src"); 4070: 4071: #if replication failed try to produce eps file dynamically 4072: $src=~s/\.ps$/\.eps/; 4073: my $temp_file; 4074: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat"); 4075: my $newsrc=$orig_src; 4076: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|; 4077: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production."); 4078: print FILE "$newsrc\n"; 4079: close FILE; 4080: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|; 4081: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|; 4082: if ($sext ne "") { # Put the ext. back in to uniquify. 4083: $src =~ s/\.eps$/$sext.eps/; 4084: } 4085: } 4086: } 4087: } 4088: my ($path,$file)=($src=~m|(.*)/([^/]*)$|); 4089: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />"); 4090: return ($path.'/',$file); 4091: } 4092: 4093: sub eps_generation { 4094: my ($src,$file,$width_param) = @_; 4095: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat"; 4096: my $temp_file = Apache::File->new('>>'.$filename); 4097: print $temp_file "$src\n"; 4098: my $newsrc = $src; 4099: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i; 4100: $newsrc=~s/\/home\/httpd\/html\/res//; 4101: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//; 4102: $newsrc=~s/\/\.\//\//; 4103: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//; 4104: if ($newsrc=~/\/home\/httpd\/lonUsers\//) { 4105: $newsrc=~s/\/home\/httpd\/lonUsers//; 4106: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//; 4107: } 4108: if ($newsrc=~/\/userfiles\//) { 4109: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} '; 4110: } else { 4111: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} '; 4112: } 4113: } 4114: 4115: sub file_path { 4116: my $src=shift; 4117: my ($file,$path); 4118: if ($src =~ m!(.*)/([^/]*)$!) { 4119: $file = $2; 4120: $path = $1.'/'; 4121: } 4122: return $file,$path; 4123: } 4124: # Converts a measurement in to mm from any of 4125: # the other valid LaTeX units of measure. 4126: # If the units of measure are missing from the 4127: # parameter, it is assumed to be in and returned 4128: # with mm units of measure 4129: sub recalc { 4130: my $argument = shift; 4131: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';} 4132: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/; 4133: my $value=$1; 4134: my $units=$2; 4135: if ($units eq 'cm') { 4136: $value*=10; 4137: } elsif ($units eq 'in') { 4138: $value*=25.4; 4139: } elsif ($units eq 'pc') { 4140: $value*=(25.4*12/72.27); 4141: } elsif ($units eq 'pt') { 4142: $value*=(25.4/72.27); 4143: } 4144: return $value.' mm'; 4145: } 4146: 4147: sub LATEX_length { 4148: my $garbage=shift; 4149: $garbage=~s/^\s+$//; 4150: $garbage=~s/^\s+(\S.*)/$1/;#space before 4151: $garbage=~s/(.*\S)\s+$/$1/;#space after 4152: $garbage=~s/(\s)+/$1/;#only one space 4153: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...} 4154: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$ 4155: $garbage=~s/([^\\])\$/$1/g;#$ 4156: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...} 4157: $garbage=~s/(\\alpha|\\beta|\\gamma|\\delta|\\epsilon|\\verepsilon|\\zeta|\\eta|\\theta|\\vartheta|\\iota|\\kappa|\\lambda|\\mu|\\nu|\\xi|\\pi|\\varpi|\\rho|\\varrho|\\sigma|\\varsigma|\\tau|\\upsilon|\\phi|\\varphi|\\chi|\\psi|\\omega|\\Gamma|\\Delta|\\Theta|\\Lambda|\\Xi|\\Pi|\\Sigma|\\Upsilon|\\Phi|\\Psi|\\Omega)/1/g; 4158: $garbage=~s/(\\pm|\\mp|\\times|\\div|\\cdot|\\ast|\\star|\\dagger|\\ddagger|\\amalg|\\cap|\\cup|\\uplus|\\sqcap|\\sqcup|\\vee|\\wedge|\\oplus|\\ominus|\\otimes|\\circ|\\bullet|\\diamond|\\lhd|\\rhd|\\unlhd|\\unrhd|\\oslash|\\odot|\\bigcirc|\\Box|\\Diamond|\\bigtriangleup|\\bigtriangledown|\\triangleleft|\\triangleright|\\setminus|\\wr)/1/g; 4159: $garbage=~s/(\\le|\\ll|\\leq|\\ge|\\geq|\\gg|\\neq|\\doreq|\\sim|\\simeq|\\subset|\\subseteq|\\sqsubset|\\sqsubseteq|\\in|\\vdash|\\models|\\supset|\\supseteq|\\sqsupset|\\sqsupseteq|\\ni|\\dash|\\perp|\\approx|\\cong|\\equiv|\\propto|\\prec|\\preceq|\\parallel|\\asymp|\\smile|\\frown|\\bowtie|\\succ|\\succeq|\\mid)/1/g; 4160: $garbage=~s/(\\not<|\\\\not\\le|\\not\\prec|\\not\\preceq|\\not\\subset|\\not\\subseteq|\\not\\sqsubseteq|\\not\\in|\\not>|\\not\\ge|\\not\\succ|\\notsucceq|\\not\\supset|\\notsupseteq|\\not\\sqsupseteq|\\notin|\\not=|\\not\\equiv|\\not\\sim|\\not\\simeq|\\not\\approx|\\not\\cong|\\not\\asymp)/1/g; 4161: $garbage=~s/(\\leftarrow|\\gets|\\Leftarrow|\\rightarrow|\\to|\\Rightarrow|\\leftrightarrow|\\Leftrightarrow|\\mapsto|\\hookleftarrow|\\leftharpoonup|\\leftkarpoondown|\\rightleftharpoons|\\longleftarrow|\\Longleftarrow|\\longrightarrow|\\Longrightarrow|\\longleftrightarrow|\\Longleftrightarrow|\\longmapsto|\\hookrightarrow|\\rightharpoonup|\\rightharpoondown|\\uparrow|\\Uparrow|\\downarrow|\\Downarrow|\\updownarrow|\\Updownarrow|\\nearrow|\\searrow|\\swarrow|\\nwarrow)/11/g; 4162: $garbage=~s/(\\aleph|\\hbar|\\imath|\\jmath|\\ell|\\wp|\\Re|\\Im|\\mho|\\prime|\\emptyset|\\nabla|\\surd|\\partial|\\top|\\bot|\\vdash|\\dashv|\\forall|\\exists|\\neg|\\flat|\\natural|\\sharp|\\\||\\angle|\\backslash|\\Box|\\Diamond|\\triangle|\\clubsuit|\\diamondsuit|\\heartsuit|\\spadesuit|\\Join|\\infty)/11/g; 4163: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g; 4164: #remove some other LaTeX command 4165: $garbage=~s|\\(\w+)\\|\\|g; 4166: $garbage=~s|\\(\w+)(\s*)|$2|g; 4167: $garbage=~s|\+|11|g; 4168: my $value=length($garbage); 4169: return $value; 4170: } 4171: 4172: 4173: # is_inside_of $tagstack $tag 4174: # This sub returns true if the current state of Xml processing 4175: # is inside of the tag. 4176: # Parameters: 4177: # tagstack - The tagstack from the parser. 4178: # tag - The tag (without the <>'s.). 4179: # Sample usage: 4180: # if (is_inside_of($tagstack "table")) { 4181: # # I'm in a table.... 4182: # } 4183: sub is_inside_of { 4184: my ($tagstack, $tag) = @_; 4185: my @stack = @$tagstack; 4186: for (my $i = ($#stack - 1); $i >= 0; $i--) { 4187: if ($stack[$i] eq $tag) { 4188: return 1; 4189: } 4190: } 4191: return 0; 4192: } 4193: 4194: 4195: 1; 4196: __END__