1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.304 2005/12/20 23:12:03 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: #
2191: # Do the appropriate magic if this has a colspan
2192: #
2193: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2194: if ($colspan > 1) {
2195: $output .= '\multicolumn{'.
2196: $colspan
2197: .'}{|l|}{';
2198: }
2199: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2200: # $output.='\vspace*{-6 mm}\begin{center}';
2201: $output.='\begin{center}';
2202: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2203: $output.=' \hfill \llap{'
2204: }
2205: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2206: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2207: # $output.='\end{center}\vspace*{-6 mm}';
2208: $output.='\end{center}';
2209: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2210: $output.='} ';
2211: }
2212: # Close off the colspan...
2213: #
2214: if ($colspan > 1) {
2215: $output .= '}';
2216: $jn += $colspan-1; # Adjust for number of rows really left.
2217: }
2218: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2219: }
2220: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2221: }
2222: # Note that \newline destroys alignment env's produced by e.g. <div>
2223: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2224: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2225: if ($#Apache::londefdef::table > 0) {
2226: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2227: # Figure out max/and min width by summing us and then
2228: # apply that to the current column of the table we nest in
2229: # if it's larger than the current width or the current width
2230: # is undefined.
2231: #
2232: my $min_nested_width = 0;
2233: my $max_nested_width = 0;
2234: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2235: $min_nested_width += $min_len[$col];
2236: $max_nested_width += $max_len[$col];
2237:
2238: }
2239: # Fudge in an extra 5 mm for borders etc:
2240:
2241: $min_nested_width += 5;
2242: $max_nested_width += 5;
2243:
2244: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2245: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2246: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2247: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2248: }
2249: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2250: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2251: }
2252:
2253: pop @Apache::londefdef::table;
2254: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2255: } else {
2256: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2257: pop @Apache::londefdef::table;
2258: undef @Apache::londefdef::table;
2259: }
2260: }
2261: return $currentstring;
2262: }
2263:
2264: #-- <tr> tag (end tag optional)
2265: sub start_tr {
2266: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2267: my $currentstring = '';
2268: if ($target eq 'web') {
2269: $currentstring = $token->[4];
2270: } elsif ($target eq 'tex') {
2271: $Apache::londefdef::table[-1]{'row_number'}++;
2272: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2273: if ($alignchar ne '') {
2274: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2275: } else {
2276: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2277: }
2278: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2279: #
2280: # Need to save the number of table columns to preserve the max # columns.
2281: #
2282: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2283: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2284: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2285: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2286: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2287: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2288: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2289: }
2290: return $currentstring;
2291: }
2292:
2293: sub end_tr {
2294: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2295: my $currentstring = &end_p(); # Close any pending <p> in the row.
2296: if ($target eq 'web') {
2297: $currentstring .= $token->[2];
2298: } elsif ($target eq 'tex') {
2299: if ($Apache::londefdef::TD_redirection) {
2300: &end_td_tex($parstack,$parser,$safeeval);
2301: }
2302: # Counter columns must be the maximum number of columns seen
2303: # in the table so far so:
2304: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2305: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2306: }
2307:
2308:
2309:
2310: }
2311: return $currentstring;
2312: }
2313:
2314: #-- <td> tag (end tag optional)
2315: sub start_td {
2316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2317: my $currentstring = '';
2318: if ($target eq 'web') {
2319: $currentstring = $token->[4];
2320: } elsif ($target eq 'tex') {
2321: $Apache::londefdef::TD_redirection = 1;
2322: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2323: }
2324: return $currentstring;
2325: }
2326:
2327: sub tag_check {
2328: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2329: my @ar=@$parstack;
2330: for (my $i=$#ar-1;$i>=0;$i--) {
2331: if (lc($$tagstack[$i]) eq $good_tag) {
2332: &start_td_tex($parstack,$parser,$safeeval);
2333: last;
2334: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2335: splice @ar, $i+1;
2336: &end_td_tex(\@ar,$parser,$safeeval);
2337: &start_td_tex($parstack,$parser,$safeeval);
2338: last;
2339: }
2340: }
2341: return '';
2342: }
2343:
2344: sub start_td_tex {
2345: my ($parstack,$parser,$safeeval) = @_;
2346: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2347: if ($alignchar eq '') {
2348: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2349: }
2350: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2351: $Apache::londefdef::table[-1]{'counter_columns'}++;
2352: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2353: if (defined $TeXwidth) {
2354: my $current_length=&recalc($TeXwidth);
2355: $current_length=~/(\d+\.?\d*)/;
2356: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2357: }
2358: &Apache::lonxml::startredirection();
2359: return '';
2360: }
2361:
2362: sub end_td_tex {
2363: my ($parstack,$parser,$safeeval) = @_;
2364: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2365: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2366: my $data = &Apache::lonxml::endredirection();
2367:
2368:
2369:
2370:
2371: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2372: if (defined $TeXwidth) {
2373: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2374: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2375: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2376: } else {
2377: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2378: my $garbage_data=$data;
2379: my $fwidth=0;
2380: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2381: my $current_length=&recalc($1);
2382: $current_length=~/(\d+\.?\d*)/;
2383: if ($fwidth<$1) {$fwidth=$1;}
2384: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2385: }
2386: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2387: my $current_length=$1;
2388: if ($fwidth<$current_length) {$fwidth=$current_length;}
2389: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2390: }
2391: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2392: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2393: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2394: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2395: } elsif ($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)*/) {
2396: my $garbage_data=$data;
2397: my $fwidth=0;
2398: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2399: my $current_length=&recalc($1);
2400: $current_length=~/(\d+\.?\d*)/;
2401: if ($fwidth<$1) {$fwidth=$1;}
2402: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2403: }
2404: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2405: my $current_length=&recalc($1);
2406: $current_length=~/(\d+\.?\d*)/;
2407: if ($fwidth<$1) {$fwidth=$1;}
2408: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2409: }
2410: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2411: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2412: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2413: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2414: $data=~s/\\\\\s*$//;
2415: } else {
2416: $data=~s/^\s+(\S.*)/$1/;
2417: $data=~s/(.*\S)\s+$/$1/;
2418: $data=~s/(\s)+/$1/;
2419: my ($current_length,$min_length)=(0,0);
2420: if ($data=~/\\vskip/) {
2421: my $newdata=$data;
2422: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2423: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2424: foreach my $elementdata (@newdata) {
2425: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2426: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2427: my @words=split(/ /,$elementdata);
2428: foreach my $word (@words) {
2429: my $lengthword=2.5*&LATEX_length($word);
2430: if ($min_length<$lengthword) {$min_length=$lengthword;}
2431: }
2432: }
2433: } else {
2434: $current_length=2.5*&LATEX_length($data);
2435: my @words=split(/ /,$data);
2436: foreach my $word (@words) {
2437: my $lengthword=2*&LATEX_length($word);
2438: if ($min_length<$lengthword) {$min_length=$lengthword;}
2439: }
2440: }
2441: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2442: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2443: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2444: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2445: }
2446: }
2447: # Substitute all of the tables nested in this cell in their appropriate places.
2448:
2449:
2450: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2451: for (my $in=0; $in<=$nested_count; $in++) {
2452: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2453: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2454: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2455: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2456:
2457: }
2458: # Should be be killing off the 'include' elements as they're used up?
2459: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2460: # Get the column and row spans.
2461: # Colspan can be done via \multicolumn if I can figure out the data structs.
2462: # Rowspan, can be done using the multirow package which adds similar stuff to rowspanning.
2463:
2464: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2465: if (!$colspan) {
2466: $colspan = 1;
2467: }
2468: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2469:
2470:
2471: # the colspan array will indicate how many columns will be spanned by this
2472: # cell..this requires that counter_columns also be adjusted accordingly
2473: # so that the next bunch of text goes in the right cell. Note that since
2474: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2475: #
2476:
2477: $Apache::londefdef::table[-1]{'colspan'}[$current_row][$current_column] = $colspan;
2478: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2479:
2480: # Put empty text in spanned cols.
2481:
2482: for (my $i = 0; $i < ($colspan -1); $i++) {
2483: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2484: }
2485:
2486:
2487: return '';
2488: }
2489:
2490: sub end_td {
2491: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2492: my $currentstring = '';
2493: if ($target eq 'web') {
2494: $currentstring = $token->[2];
2495: } elsif ($target eq 'tex') {
2496: $Apache::londefdef::TD_redirection =0;
2497: &end_td_tex($parstack,$parser,$safeeval);
2498: }
2499: return $currentstring;
2500: }
2501:
2502: #-- <th> tag (end tag optional)
2503: sub start_th {
2504: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2505: my $currentstring = '';
2506: if ($target eq 'web') {
2507: $currentstring = $token->[4];
2508: } elsif ($target eq 'tex') {
2509: $Apache::londefdef::TD_redirection = 1;
2510: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2511: }
2512: return $currentstring;
2513: }
2514:
2515: sub tagg_check {
2516: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2517: my @ar=@$parstack;
2518: for (my $i=$#ar-1;$i>=0;$i--) {
2519: if (lc($$tagstack[$i]) eq $good_tag) {
2520: &start_th_tex($parstack,$parser,$safeeval);
2521: last;
2522: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2523: splice @ar, $i+1;
2524: &end_th_tex(\@ar,$parser,$safeeval);
2525: &start_th_tex($parstack,$parser,$safeeval);
2526: last;
2527: }
2528: }
2529: return '';
2530: }
2531:
2532: sub start_th_tex {
2533: my ($parstack,$parser,$safeeval) = @_;
2534: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2535: if ($alignchar eq '') {
2536: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2537: }
2538: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2539: $Apache::londefdef::table[-1]{'counter_columns'}++;
2540: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2541: if (defined $TeXwidth) {
2542: my $current_length=&recalc($TeXwidth);
2543: $current_length=~/(\d+\.?\d*)/;
2544: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2545: }
2546: &Apache::lonxml::startredirection();
2547: return '';
2548: }
2549:
2550: sub end_th_tex {
2551: my ($parstack,$parser,$safeeval) = @_;
2552: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2553: my $data=&Apache::lonxml::endredirection();
2554: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2555: if (defined $TeXwidth) {
2556: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2557: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2558: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2559: } else {
2560: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2561: my $garbage_data=$data;
2562: my $fwidth=0;
2563: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2564: my $current_length=&recalc($1);
2565: $current_length=~/(\d+\.?\d*)/;
2566: if ($fwidth<$1) {$fwidth=$1;}
2567: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2568: }
2569: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2570: my $current_length=$1;
2571: if ($fwidth<$current_length) {$fwidth=$current_length;}
2572: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2573: }
2574: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2575: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2576: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2577: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2578: } else {
2579: $data=~s/^\s+(\S.*)/$1/;
2580: $data=~s/(.*\S)\s+$/$1/;
2581: $data=~s/(\s)+/$1/;
2582: my ($current_length,$min_length)=(0,0);
2583: if ($data=~/\\vskip/) {
2584: my $newdata=$data;
2585: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2586: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2587: foreach my $elementdata (@newdata) {
2588: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2589: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2590: my @words=split(/ /,$elementdata);
2591: foreach my $word (@words) {
2592: my $lengthword=2.5*&LATEX_length($word);
2593: if ($min_length<$lengthword) {$min_length=$lengthword;}
2594: }
2595: }
2596: } else {
2597: $current_length=2.5*&LATEX_length($data);
2598: my @words=split(/ /,$data);
2599: foreach my $word (@words) {
2600: my $lengthword=2*&LATEX_length($word);
2601: if ($min_length<$lengthword) {$min_length=$lengthword;}
2602: }
2603: }
2604: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2605: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2606: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2607: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2608: }
2609: }
2610: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2611: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2612: }
2613: #make data bold
2614: $data='\textbf{'.$data.'}';
2615: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2616: return'';
2617: }
2618:
2619: sub end_th {
2620: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2621: my $currentstring = &end_p(); # Close any open <p> in the row.
2622: if ($target eq 'web') {
2623: $currentstring .= $token->[2];
2624: } elsif ($target eq 'tex') {
2625: $Apache::londefdef::TD_redirection =0;
2626: &end_th_tex($parstack,$parser,$safeeval);
2627: }
2628: return $currentstring;
2629: }
2630:
2631: #-- <img> tag (end tag forbidden)
2632: #
2633: # Render the <IMG> tag.
2634: # <IMG> has the following attributes (in addition to the
2635: # standard HTML ones:
2636: # TeXwrap - Governs how the tex target will try to wrap text around
2637: # horizontally aligned images.
2638: # TeXwidth - The width of the image when rendered for print (mm).
2639: # TeXheight - The height of the image when rendered for print (mm)
2640: # (Note there seems to also be support for this as a % of page size)
2641: #
2642: sub start_img {
2643: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2644: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2645: undef,1);
2646: if (not $src and ($target eq 'web' or $target eq 'tex')) {
2647: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2648: return '';
2649: }
2650: &Apache::lonxml::extlink($src);
2651: my $currentstring = '';
2652: my $scaling = .3;
2653:
2654: # Render unto browsers that which are the browser's...
2655:
2656: if ($target eq 'web') {
2657: if ($env{'browser.imagesuppress'} ne 'on') {
2658: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2659: } else {
2660: my $alttag= &Apache::lonxml::get_param
2661: ('alt',$parstack,$safeeval,undef,1);
2662: unless ($alttag) {
2663: $alttag=&Apache::lonmeta::alttag
2664: ($Apache::lonxml::pwd[-1],$src);
2665: }
2666: $currentstring.='[IMAGE: '.$alttag.']';
2667: }
2668:
2669: # and render unto TeX that which is LaTeX
2670:
2671: } elsif ($target eq 'tex') {
2672: #
2673: # The alignment will require some superstructure to be put around
2674: # the \includegraphics stuff. At present we can only partially
2675: # simulate the alignments offered by html.
2676: #
2677: #
2678: my $align = lc(&Apache::lonxml::get_param('align',
2679: $parstack,
2680: $safeeval,
2681: undef,1));
2682: if(!$align) {
2683: if (&is_inside_of($tagstack, "table")) {
2684: $align = "right"; # Force wraptext use.
2685: } else {
2686: $align = "bottom"; # This is html's default so it's ours too.
2687: }
2688: }
2689: #
2690: &Apache::lonxml::debug("Alignemnt = $align");
2691: # LaTeX's image/text wrapping is really bad since it wants to
2692: # make figures float.
2693: # The user has the optional parameter (applicable only to l/r
2694: # alignment to use the picins/parpic directive to get wrapped text
2695: # this is also imperfect.. that's why we give them a choice...
2696: # so they can't yell at us for our choice.
2697: #
2698: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2699: $parstack,
2700: $safeeval,
2701: undef,0);
2702: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2703: if(!$latex_rendering) {
2704: $latex_rendering = "texwrap";
2705: }
2706: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2707:
2708: #if original gif/jpg/png file exist do following:
2709: my $origsrc=$src;
2710: my ($path,$file) = &get_eps_image($src);
2711: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2712: &Apache::lonxml::debug("path = $path file = $file src = $src");
2713: if (-e $src) {
2714: &Apache::lonxml::debug("$src exists");
2715: my ($height_param,$width_param)=
2716: &image_size($origsrc,0.3,$parstack,$safeeval);
2717: my $destpath = $path;
2718: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2719: my $destfile = $file;
2720: $destfile =~ s/ /\_/g;
2721: my $size;
2722: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2723: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2724: $size='['.$size;
2725: $size=~s/,$/]/;
2726: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2727: .'\includegraphics'.$size.'{'.$destfile.'} ';
2728:
2729: # If there's an alignment specification we need to honor it here.
2730: # For the horizontal alignments, we will also honor the
2731: # value of the latex specfication. The default is parbox,
2732: # and that's used for illegal values too.
2733: #
2734: # Even though we set a default alignment value, the user
2735: # could have given us an illegal value. In that case we
2736: # just use the default alignment of bottom..
2737: if ($align eq "top") {
2738: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2739: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2740: my $offset = $height_param/2;
2741: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2742: } elsif ($align eq "left") {
2743: if ($latex_rendering eq "parpic") {
2744: $currentstring = '\parpic[l]{'.$currentstring.'}';
2745: } else { # wrapfig render
2746: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2747: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2748: }
2749: } elsif ($align eq "right") {
2750: if ($latex_rendering eq "parpic") {
2751: $currentstring = '\parpic[r]{'.$currentstring.'}';
2752: } else { # wrapfig rendering
2753: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2754: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2755:
2756: }
2757: } else { # Bottom is also default.
2758: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2759: }
2760: } else {
2761: &Apache::lonxml::debug("$src does not exist");
2762: #original image file doesn't exist so check the alt attribute
2763: my $alt =
2764: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2765: unless ($alt) {
2766: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2767: }
2768:
2769: if ($alt) { $currentstring .= ' '.$alt.' '; }
2770: }
2771:
2772: # And here's where the semi-quote breaks down: allow the user
2773: # to edit the beast as well by rendering the problem for edit:
2774: } elsif ($target eq 'edit') {
2775: $currentstring .=&Apache::edit::tag_start($target,$token);
2776: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2777: &Apache::edit::browse('src',undef,'alt').' '.
2778: &Apache::edit::search('src',undef,'alt').'<br />';
2779: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2780: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2781: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2782: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2783: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2784: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2785: ['','bottom','middle','top','left','right'],$token,5);
2786: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2787: ['', 'parbox', 'parpic'], $token, 2);
2788: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2789: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2790: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2791: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2792: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2793:
2794:
2795: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2796: if ($width) { $currentstring.=' width="'.$width.'" '; }
2797: if ($height) { $currentstring.=' height="'.$height.'" '; }
2798: $currentstring .= ' />';
2799: } elsif ($target eq 'modified') {
2800: my ($osrc,$owidth,$oheight)=
2801: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2802: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2803: $safeeval,'src','alt','align',
2804: 'TeXwidth','TeXheight', 'TeXwrap',
2805: 'width','height');
2806: my ($nsrc,$nwidth,$nheight)=
2807: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2808: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2809: &image_replication($loc);
2810: my ($iwidth,$iheight);
2811: if (-e $loc) {
2812: my $image = Image::Magick->new;
2813: $image->Read($loc);
2814: ($iwidth, $iheight) = ($image->Get('width'),
2815: $image->Get('height'));
2816: }
2817: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2818: # changed image or no size specified,
2819: # if they didn't explicitly change the
2820: # width or height use the ones from the image
2821: if ($iwidth && $iheight) {
2822: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2823: $token->[2]{'width'} = $iwidth;$ctag=1;
2824: }
2825: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2826: $token->[2]{'height'}=$iheight;$ctag=1;
2827: }
2828: }
2829: }
2830: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2831: # if we don't have a width or height
2832: if ($iwidth && $cwidth && !$cheight) {
2833: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2834: }
2835: if ($iheight && $cheight && !$cwidth) {
2836: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2837: }
2838: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2839: }
2840:
2841: return $currentstring;
2842: }
2843:
2844: sub end_img {
2845: my ($target,$token) = @_;
2846: my $currentstring = '';
2847: if ($target eq 'web') {
2848: $currentstring = $token->[2];
2849: } elsif ($target eq 'tex') {
2850: $currentstring = '';
2851: }
2852: return $currentstring;
2853: }
2854:
2855: #-- <applet> tag (end tag required)
2856: sub start_applet {
2857: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2858:
2859: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2860: &Apache::lonxml::extlink($code);
2861: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2862: undef,1);
2863: &Apache::lonxml::extlink($archive);
2864: my $currentstring = '';
2865: if ($target eq 'web') {
2866: if ($env{'browser.appletsuppress'} ne 'on') {
2867: $currentstring = &Apache::lonenc::encrypt_ref($token,
2868: {'code'=>$code,
2869: 'archive'=>$archive}
2870: );
2871: } else {
2872: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2873: $safeeval,undef,1);
2874: unless ($alttag) {
2875: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2876: $code);
2877: }
2878: $currentstring='[APPLET: '.$alttag.']';
2879: }
2880: } elsif ($target eq 'tex') {
2881: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2882: $safeeval,undef,1);
2883: unless ($alttag) {
2884: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2885: undef,1);
2886: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2887: $code);
2888: }
2889: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2890: '.}\end{center}';
2891: }
2892: return $currentstring;
2893: }
2894:
2895: sub end_applet {
2896: my ($target,$token) = @_;
2897: my $currentstring = '';
2898: if ($target eq 'web') {
2899: $currentstring = $token->[2];
2900: } elsif ($target eq 'tex') {
2901: }
2902: return $currentstring;
2903: }
2904:
2905: #-- <embed> tag (end tag optional/required)
2906: sub start_embed {
2907: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2908: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2909: &Apache::lonxml::extlink($src);
2910: my $currentstring = '';
2911: if ($target eq 'web') {
2912: if ($env{'browser.embedsuppress'} ne 'on') {
2913: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2914: } else {
2915: my $alttag=&Apache::lonxml::get_param
2916: ('alt',$parstack,$safeeval,undef,1);
2917: unless ($alttag) {
2918: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2919: }
2920: $currentstring='[EMBED: '.$alttag.']';
2921: }
2922: } elsif ($target eq 'tex') {
2923: }
2924: return $currentstring;
2925: }
2926:
2927: sub end_embed {
2928: my ($target,$token) = @_;
2929: my $currentstring = '';
2930: if ($target eq 'web') {
2931: $currentstring = $token->[2];
2932: } elsif ($target eq 'tex') {
2933: }
2934: return $currentstring;
2935: }
2936:
2937: #-- <param> tag (end tag forbidden)
2938: sub start_param {
2939: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2940: if (&Apache::lonxml::get_param('name',$parstack,
2941: $safeeval,undef,1)=~/^cabbase$/i) {
2942: my $value=&Apache::lonxml::get_param('value',$parstack,
2943: $safeeval,undef,1);
2944: &Apache::lonxml::extlink($value);
2945: }
2946:
2947: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2948: &Apache::lonxml::extlink($src);
2949: my $currentstring = '';
2950: if ($target eq 'web') {
2951: my %toconvert;
2952: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2953: if ($src) { $toconvert{'src'}= $src; }
2954: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
2955: undef,1);
2956: if ($name=~/^cabbase$/i) {
2957: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
2958: $safeeval,undef,1);
2959: }
2960: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
2961: } elsif ($target eq 'tex') {
2962: }
2963: return $currentstring;
2964: }
2965:
2966: sub end_param {
2967: my ($target,$token) = @_;
2968: my $currentstring = '';
2969: if ($target eq 'web') {
2970: $currentstring = $token->[2];
2971: } elsif ($target eq 'tex') {
2972: }
2973: return $currentstring;
2974: }
2975:
2976: #-- <allow> tag
2977: sub start_allow {
2978: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2979: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2980: &Apache::lonxml::extlink($src);
2981:
2982: if ($target eq 'tex') { &image_replication($src); }
2983: my $result;
2984: if ($target eq 'edit') {
2985: $result .=&Apache::edit::tag_start($target,$token);
2986: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
2987: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
2988: } elsif ($target eq 'modified') {
2989: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
2990: $safeeval,'src');
2991: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
2992: }
2993: return $result;
2994: }
2995:
2996: sub end_allow {
2997: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2998: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
2999: return '';
3000: }
3001:
3002: #-- Frames (end tag required)
3003: #-- <frameset>
3004: sub start_frameset {
3005: my ($target,$token) = @_;
3006: my $currentstring = ''; # Close any pending para.
3007: if ($target eq 'web') {
3008: if (!$Apache::lonxml::registered &&
3009: $env{'request.state'} eq 'published') {
3010: $currentstring.='<head>'.
3011: &Apache::lonmenu::registerurl(undef,$target).'</head>';
3012: }
3013: my $onLoad='';
3014: foreach my $key (keys(%{$token->[2]})) {
3015: if ($key =~ /^onload$/i) {
3016: $onLoad.=$token->[2]->{$key}.';';
3017: delete($token->[2]->{$key});
3018: }
3019: }
3020: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
3021: my $onUnload='';
3022: foreach my $key (keys(%{$token->[2]})) {
3023: if ($key =~ /^onunload$/i) {
3024: $onUnload.=$token->[2]->{$key}.';';
3025: delete($token->[2]->{$key});
3026: }
3027: }
3028: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
3029: ';'.$onUnload;
3030:
3031: $currentstring .= '<'.$token->[1];
3032: foreach (keys %{$token->[2]}) {
3033: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
3034: }
3035: $currentstring.='>';
3036: }
3037: return $currentstring;
3038: }
3039:
3040: sub end_frameset {
3041: my ($target,$token) = @_;
3042: my $currentstring = '';
3043: if ($target eq 'web') {
3044: $currentstring = $token->[2];
3045: }
3046: return $currentstring;
3047: }
3048:
3049: #-- <xmp> (end tag required)
3050: sub start_xmp {
3051: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3052: my $currentstring = '';
3053: if ($target eq 'web') {
3054: $currentstring .= $token->[4];
3055: } elsif ($target eq 'tex') {
3056: $currentstring .= '\begin{verbatim}';
3057: }
3058: return $currentstring;
3059: }
3060:
3061: sub end_xmp {
3062: my ($target,$token) = @_;
3063: my $currentstring = '';
3064: if ($target eq 'web') {
3065: $currentstring .= $token->[2];
3066: } elsif ($target eq 'tex') {
3067: $currentstring .= '\end{verbatim}';
3068: }
3069: return $currentstring;
3070: }
3071:
3072: #-- <pre> (end tag required)
3073: sub start_pre {
3074: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3075: my $currentstring = &end_p(); # close off pending <p>
3076: if ($target eq 'web') {
3077: $currentstring .= $token->[4];
3078: } elsif ($target eq 'tex') {
3079: $currentstring .= '\begin{verbatim}';
3080: }
3081: return $currentstring;
3082: }
3083:
3084: sub end_pre {
3085: my ($target,$token) = @_;
3086: my $currentstring = '';
3087: if ($target eq 'web') {
3088: $currentstring .= $token->[2];
3089: } elsif ($target eq 'tex') {
3090: $currentstring .= '\end{verbatim}';
3091: }
3092: return $currentstring;
3093: }
3094:
3095: #-- <insert>
3096: sub start_insert {
3097: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3098: my $currentstring = '';
3099: if ($target eq 'web') {
3100: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3101: $currentstring .= '<b>'.$display.'</b>';;
3102: }
3103: return $currentstring;
3104: }
3105:
3106: sub end_insert {
3107: my ($target,$token) = @_;
3108: my $currentstring = '';
3109: if ($target eq 'web') {
3110: $currentstring .= '';
3111: }
3112: return $currentstring;
3113: }
3114:
3115: #-- <externallink>
3116: sub start_externallink {
3117: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3118: my $currentstring = '';
3119: if ($target eq 'web') {
3120: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3121: $currentstring .= '<b>'.$display.'</b>';;
3122: }
3123: return $currentstring;
3124: }
3125:
3126: sub end_externallink {
3127: my ($target,$token) = @_;
3128: my $currentstring = '';
3129: if ($target eq 'web') {
3130: $currentstring .= '';
3131: }
3132: return $currentstring;
3133: }
3134:
3135: #-- <blankspace heigth="">
3136: sub start_blankspace {
3137: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3138: my $currentstring = &end_p(); # closes off any unclosed <p>
3139: if ($target eq 'tex') {
3140: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3141: $currentstring .= '\vskip '.$howmuch.' ';
3142: }
3143: return $currentstring;
3144: }
3145:
3146: sub end_blankspace {
3147: my ($target,$token) = @_;
3148: my $currentstring = '';
3149: if ($target eq 'tex') {
3150: $currentstring .= '';
3151: }
3152: return $currentstring;
3153: }
3154:
3155: #-- <abbr> tag (end tag required)
3156: sub start_abbr {
3157: my ($target,$token) = @_;
3158: my $currentstring = '';
3159: if ($target eq 'web') {
3160: $currentstring = $token->[4];
3161: }
3162: return $currentstring;
3163: }
3164:
3165: sub end_abbr {
3166: my ($target,$token) = @_;
3167: my $currentstring = '';
3168: if ($target eq 'web') {
3169: $currentstring = $token->[2];
3170: }
3171: return $currentstring;
3172: }
3173:
3174: #-- <acronym> tag (end tag required)
3175: sub start_acronym {
3176: my ($target,$token) = @_;
3177: my $currentstring = '';
3178: if ($target eq 'web') {
3179: $currentstring = $token->[4];
3180: }
3181: return $currentstring;
3182: }
3183:
3184: sub end_acronym {
3185: my ($target,$token) = @_;
3186: my $currentstring = '';
3187: if ($target eq 'web') {
3188: $currentstring = $token->[2];
3189: }
3190: return $currentstring;
3191: }
3192:
3193: #-- <area> tag (end tag forbidden)
3194: sub start_area {
3195: my ($target,$token) = @_;
3196: my $currentstring = '';
3197: if ($target eq 'web') {
3198: $currentstring = $token->[4];
3199: }
3200: return $currentstring;
3201: }
3202:
3203: sub end_area {
3204: my ($target,$token) = @_;
3205: my $currentstring = '';
3206: if ($target eq 'web') {
3207: $currentstring = $token->[2];
3208: }
3209: return $currentstring;
3210: }
3211:
3212: #-- <base> tag (end tag forbidden)
3213: sub start_base {
3214: my ($target,$token) = @_;
3215: my $currentstring = '';
3216: if ($target eq 'web') {
3217: $currentstring = $token->[4];
3218: }
3219: return $currentstring;
3220: }
3221:
3222: sub end_base {
3223: my ($target,$token) = @_;
3224: my $currentstring = '';
3225: if ($target eq 'web') {
3226: $currentstring = $token->[2];
3227: }
3228: return $currentstring;
3229: }
3230:
3231: #-- <bdo> tag (end tag required)
3232: sub start_bdo {
3233: my ($target,$token) = @_;
3234: my $currentstring = '';
3235: if ($target eq 'web') {
3236: $currentstring = $token->[4];
3237: }
3238: return $currentstring;
3239: }
3240:
3241: sub end_bdo {
3242: my ($target,$token) = @_;
3243: my $currentstring = '';
3244: if ($target eq 'web') {
3245: $currentstring = $token->[2];
3246: }
3247: return $currentstring;
3248: }
3249:
3250: #-- <bgsound> tag (end tag optional)
3251: sub start_bgsound {
3252: my ($target,$token) = @_;
3253: my $currentstring = '';
3254: if ($target eq 'web') {
3255: $currentstring = $token->[4];
3256: }
3257: return $currentstring;
3258: }
3259:
3260: sub end_bgsound {
3261: my ($target,$token) = @_;
3262: my $currentstring = '';
3263: if ($target eq 'web') {
3264: $currentstring = $token->[2];
3265: }
3266: return $currentstring;
3267: }
3268:
3269: #-- <blink> tag (end tag required)
3270: sub start_blink {
3271: my ($target,$token) = @_;
3272: my $currentstring = '';
3273: if ($target eq 'web') {
3274: $currentstring = $token->[4];
3275: }
3276: return $currentstring;
3277: }
3278:
3279: sub end_blink {
3280: my ($target,$token) = @_;
3281: my $currentstring = '';
3282: if ($target eq 'web') {
3283: $currentstring = $token->[2];
3284: }
3285: return $currentstring;
3286: }
3287:
3288: #-- <blockquote> tag (end tag required)
3289: sub start_blockquote {
3290: my ($target,$token) = @_;
3291: my $currentstring = &end_p(); # Close any unclosed <p>
3292: if ($target eq 'web') {
3293: $currentstring .= $token->[4];
3294: }
3295: return $currentstring;
3296: }
3297:
3298: sub end_blockquote {
3299: my ($target,$token) = @_;
3300: my $currentstring = '';
3301: if ($target eq 'web') {
3302: $currentstring = $token->[2];
3303: }
3304: return $currentstring;
3305: }
3306:
3307: #-- <button> tag (end tag required)
3308: sub start_button {
3309: my ($target,$token) = @_;
3310: my $currentstring = '';
3311: if ($target eq 'web') {
3312: $currentstring = $token->[4];
3313: }
3314: return $currentstring;
3315: }
3316:
3317: sub end_button {
3318: my ($target,$token) = @_;
3319: my $currentstring = '';
3320: if ($target eq 'web') {
3321: $currentstring = $token->[2];
3322: }
3323: return $currentstring;
3324: }
3325:
3326: #-- <caption> tag (end tag required)
3327: sub start_caption {
3328: my ($target,$token) = @_;
3329: my $currentstring = '';
3330: if ($target eq 'web') {
3331: $currentstring = $token->[4];
3332: }
3333: return $currentstring;
3334: }
3335:
3336: sub end_caption {
3337: my ($target,$token) = @_;
3338: my $currentstring = '';
3339: if ($target eq 'web') {
3340: $currentstring = $token->[2];
3341: }
3342: return $currentstring;
3343: }
3344:
3345: #-- <col> tag (end tag forbdden)
3346: sub start_col {
3347: my ($target,$token) = @_;
3348: my $currentstring = '';
3349: if ($target eq 'web') {
3350: $currentstring = $token->[4];
3351: }
3352: return $currentstring;
3353: }
3354:
3355: sub end_col {
3356: my ($target,$token) = @_;
3357: my $currentstring = '';
3358: if ($target eq 'web') {
3359: $currentstring = $token->[2];
3360: }
3361: return $currentstring;
3362: }
3363:
3364: #-- <colgroup> tag (end tag optional)
3365: sub start_colgroup {
3366: my ($target,$token) = @_;
3367: my $currentstring = '';
3368: if ($target eq 'web') {
3369: $currentstring = $token->[4];
3370: }
3371: return $currentstring;
3372: }
3373:
3374: sub end_colgroup {
3375: my ($target,$token) = @_;
3376: my $currentstring = '';
3377: if ($target eq 'web') {
3378: $currentstring = $token->[2];
3379: }
3380: return $currentstring;
3381: }
3382:
3383: #-- <del> tag (end tag required)
3384: sub start_del {
3385: my ($target,$token) = @_;
3386: my $currentstring = '';
3387: if ($target eq 'web') {
3388: $currentstring = $token->[4];
3389: }
3390: return $currentstring;
3391: }
3392:
3393: sub end_del {
3394: my ($target,$token) = @_;
3395: my $currentstring = '';
3396: if ($target eq 'web') {
3397: $currentstring = $token->[2];
3398: }
3399: return $currentstring;
3400: }
3401:
3402: #-- <fieldset> tag (end tag required)
3403: sub start_fieldset {
3404: my ($target,$token) = @_;
3405: my $currentstring = '';
3406: if ($target eq 'web') {
3407: $currentstring = $token->[4];
3408: }
3409: return $currentstring;
3410: }
3411:
3412: sub end_fieldset {
3413: my ($target,$token) = @_;
3414: my $currentstring = '';
3415: if ($target eq 'web') {
3416: $currentstring = $token->[2];
3417: }
3418: return $currentstring;
3419: }
3420:
3421: #-- <frame> tag (end tag forbidden)
3422: sub start_frame {
3423: my ($target,$token) = @_;
3424: my $currentstring = '';
3425: if ($target eq 'web') {
3426: $currentstring = $token->[4];
3427: }
3428: return $currentstring;
3429: }
3430:
3431: sub end_frame {
3432: my ($target,$token) = @_;
3433: my $currentstring = '';
3434: if ($target eq 'web') {
3435: $currentstring = $token->[2];
3436: }
3437: return $currentstring;
3438: }
3439:
3440: #-- <iframe> tag (end tag required)
3441: sub start_iframe {
3442: my ($target,$token) = @_;
3443: my $currentstring = '';
3444: if ($target eq 'web') {
3445: $currentstring = $token->[4];
3446: }
3447: return $currentstring;
3448: }
3449:
3450: sub end_iframe {
3451: my ($target,$token) = @_;
3452: my $currentstring = '';
3453: if ($target eq 'web') {
3454: $currentstring = $token->[2];
3455: }
3456: return $currentstring;
3457: }
3458:
3459: #-- <ins> tag (end tag required)
3460: sub start_ins {
3461: my ($target,$token) = @_;
3462: my $currentstring = '';
3463: if ($target eq 'web') {
3464: $currentstring = $token->[4];
3465: }
3466: return $currentstring;
3467: }
3468:
3469: sub end_ins {
3470: my ($target,$token) = @_;
3471: my $currentstring = '';
3472: if ($target eq 'web') {
3473: $currentstring = $token->[2];
3474: }
3475: return $currentstring;
3476: }
3477:
3478: #-- <isindex> tag (end tag forbidden)
3479: sub start_isindex {
3480: my ($target,$token) = @_;
3481: my $currentstring = '';
3482: if ($target eq 'web') {
3483: $currentstring = $token->[4];
3484: }
3485: return $currentstring;
3486: }
3487:
3488: sub end_isindex {
3489: my ($target,$token) = @_;
3490: my $currentstring = '';
3491: if ($target eq 'web') {
3492: $currentstring = $token->[2];
3493: }
3494: return $currentstring;
3495: }
3496:
3497: #-- <keygen> tag (end tag forbidden)
3498: sub start_keygen {
3499: my ($target,$token) = @_;
3500: my $currentstring = '';
3501: if ($target eq 'web') {
3502: $currentstring = $token->[4];
3503: }
3504: return $currentstring;
3505: }
3506:
3507: sub end_keygen {
3508: my ($target,$token) = @_;
3509: my $currentstring = '';
3510: if ($target eq 'web') {
3511: $currentstring = $token->[2];
3512: }
3513: return $currentstring;
3514: }
3515:
3516: #-- <label> tag
3517: sub start_label {
3518: my ($target,$token) = @_;
3519: my $currentstring = '';
3520: if ($target eq 'web') {
3521: $currentstring = $token->[4];
3522: }
3523: return $currentstring;
3524: }
3525:
3526: sub end_label {
3527: my ($target,$token) = @_;
3528: my $currentstring = '';
3529: if ($target eq 'web') {
3530: $currentstring = $token->[2];
3531: }
3532: return $currentstring;
3533: }
3534:
3535: #-- <layer> tag (end tag required)
3536: sub start_layer {
3537: my ($target,$token) = @_;
3538: my $currentstring = '';
3539: if ($target eq 'web') {
3540: $currentstring = $token->[4];
3541: }
3542: return $currentstring;
3543: }
3544:
3545: sub end_layer {
3546: my ($target,$token) = @_;
3547: my $currentstring = '';
3548: if ($target eq 'web') {
3549: $currentstring = $token->[2];
3550: }
3551: return $currentstring;
3552: }
3553:
3554: #-- <legend> tag (end tag required)
3555: sub start_legend {
3556: my ($target,$token) = @_;
3557: my $currentstring = '';
3558: if ($target eq 'web') {
3559: $currentstring = $token->[4];
3560: }
3561: return $currentstring;
3562: }
3563:
3564: sub end_legend {
3565: my ($target,$token) = @_;
3566: my $currentstring = '';
3567: if ($target eq 'web') {
3568: $currentstring = $token->[2];
3569: }
3570: return $currentstring;
3571: }
3572:
3573: #-- <link> tag (end tag forbidden)
3574: sub start_link {
3575: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3576: my $currentstring = '';
3577: if ($target eq 'web') {
3578: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3579: undef,1);
3580: &Apache::lonxml::extlink($href);
3581: $currentstring = $token->[4];
3582: }
3583: return $currentstring;
3584: }
3585:
3586: sub end_link {
3587: my ($target,$token) = @_;
3588: my $currentstring = '';
3589: if ($target eq 'web') {
3590: $currentstring = $token->[2];
3591: }
3592: return $currentstring;
3593: }
3594:
3595: #-- <marquee> tag (end tag optional)
3596: sub start_marquee {
3597: my ($target,$token) = @_;
3598: my $currentstring = '';
3599: if ($target eq 'web') {
3600: $currentstring = $token->[4];
3601: }
3602: return $currentstring;
3603: }
3604:
3605: sub end_marquee {
3606: my ($target,$token) = @_;
3607: my $currentstring = '';
3608: if ($target eq 'web') {
3609: $currentstring = $token->[2];
3610: }
3611: return $currentstring;
3612: }
3613:
3614: #-- <multicol> tag (end tag required)
3615: sub start_multicol {
3616: my ($target,$token) = @_;
3617: my $currentstring = &end_p(); # Close any pending <p>
3618: if ($target eq 'web') {
3619: $currentstring .= $token->[4];
3620: }
3621: return $currentstring;
3622: }
3623:
3624: sub end_multicol {
3625: my ($target,$token) = @_;
3626: my $currentstring = '';
3627: if ($target eq 'web') {
3628: $currentstring = $token->[2];
3629: }
3630: return $currentstring;
3631: }
3632:
3633: #-- <nobr> tag (end tag required)
3634: sub start_nobr {
3635: my ($target,$token) = @_;
3636: my $currentstring = '';
3637: if ($target eq 'web') {
3638: $currentstring = $token->[4];
3639: } elsif ($target eq 'tex') {
3640: $currentstring='\mbox{';
3641: }
3642: return $currentstring;
3643: }
3644:
3645: sub end_nobr {
3646: my ($target,$token) = @_;
3647: my $currentstring = '';
3648: if ($target eq 'web') {
3649: $currentstring = $token->[2];
3650: } elsif ($target eq 'tex') {
3651: $currentstring='}';
3652: }
3653: return $currentstring;
3654: }
3655:
3656: #-- <noembed> tag (end tag required)
3657: sub start_noembed {
3658: my ($target,$token) = @_;
3659: my $currentstring = '';
3660: if ($target eq 'web') {
3661: $currentstring = $token->[4];
3662: }
3663: return $currentstring;
3664: }
3665:
3666: sub end_noembed {
3667: my ($target,$token) = @_;
3668: my $currentstring = '';
3669: if ($target eq 'web') {
3670: $currentstring = $token->[2];
3671: }
3672: return $currentstring;
3673: }
3674:
3675: #-- <noframes> tag (end tag required)
3676: sub start_noframes {
3677: my ($target,$token) = @_;
3678: my $currentstring = '';
3679: if ($target eq 'web') {
3680: $currentstring = $token->[4];
3681: }
3682: return $currentstring;
3683: }
3684:
3685: sub end_noframes {
3686: my ($target,$token) = @_;
3687: my $currentstring = '';
3688: if ($target eq 'web') {
3689: $currentstring = $token->[2];
3690: }
3691: return $currentstring;
3692: }
3693:
3694: #-- <nolayer> tag (end tag required)
3695: sub start_nolayer {
3696: my ($target,$token) = @_;
3697: my $currentstring = '';
3698: if ($target eq 'web') {
3699: $currentstring = $token->[4];
3700: }
3701: return $currentstring;
3702: }
3703:
3704: sub end_nolayer {
3705: my ($target,$token) = @_;
3706: my $currentstring = '';
3707: if ($target eq 'web') {
3708: $currentstring = $token->[2];
3709: }
3710: return $currentstring;
3711: }
3712:
3713: #-- <noscript> tag (end tag required)
3714: sub start_noscript {
3715: my ($target,$token) = @_;
3716: my $currentstring = '';
3717: if ($target eq 'web') {
3718: $currentstring = $token->[4];
3719: }
3720: return $currentstring;
3721: }
3722:
3723: sub end_noscript {
3724: my ($target,$token) = @_;
3725: my $currentstring = '';
3726: if ($target eq 'web') {
3727: $currentstring = $token->[2];
3728: }
3729: return $currentstring;
3730: }
3731:
3732: #-- <object> tag (end tag required)
3733: sub start_object {
3734: my ($target,$token) = @_;
3735: my $currentstring = '';
3736: if ($target eq 'web') {
3737: $currentstring = $token->[4];
3738: }
3739: return $currentstring;
3740: }
3741:
3742: sub end_object {
3743: my ($target,$token) = @_;
3744: my $currentstring = '';
3745: if ($target eq 'web') {
3746: $currentstring = $token->[2];
3747: }
3748: return $currentstring;
3749: }
3750:
3751: #-- <optgroup> tag (end tag required)
3752: sub start_optgroup {
3753: my ($target,$token) = @_;
3754: my $currentstring = '';
3755: if ($target eq 'web') {
3756: $currentstring = $token->[4];
3757: }
3758: return $currentstring;
3759: }
3760:
3761: sub end_optgroup {
3762: my ($target,$token) = @_;
3763: my $currentstring = '';
3764: if ($target eq 'web') {
3765: $currentstring = $token->[2];
3766: }
3767: return $currentstring;
3768: }
3769:
3770: #-- <samp> tag (end tag required)
3771: sub start_samp {
3772: my ($target,$token) = @_;
3773: my $currentstring = '';
3774: if ($target eq 'web') {
3775: $currentstring = $token->[4];
3776: } elsif ($target eq 'tex') {
3777: $currentstring='\texttt{';
3778: }
3779: return $currentstring;
3780: }
3781:
3782: sub end_samp {
3783: my ($target,$token) = @_;
3784: my $currentstring = '';
3785: if ($target eq 'web') {
3786: $currentstring = $token->[2];
3787: } elsif ($target eq 'tex') {
3788: $currentstring='}';
3789: }
3790: return $currentstring;
3791: }
3792:
3793: #-- <server> tag
3794: sub start_server {
3795: my ($target,$token) = @_;
3796: my $currentstring = '';
3797: if ($target eq 'web') {
3798: $currentstring = $token->[4];
3799: }
3800: return $currentstring;
3801: }
3802:
3803: sub end_server {
3804: my ($target,$token) = @_;
3805: my $currentstring = '';
3806: if ($target eq 'web') {
3807: $currentstring = $token->[2];
3808: }
3809: return $currentstring;
3810: }
3811:
3812: #-- <spacer> tag (end tag forbidden)
3813: sub start_spacer {
3814: my ($target,$token) = @_;
3815: my $currentstring = &end_p(); # Close off any open <p> tag.
3816: if ($target eq 'web') {
3817: $currentstring .= $token->[4];
3818: }
3819: return $currentstring;
3820: }
3821:
3822: sub end_spacer {
3823: my ($target,$token) = @_;
3824: my $currentstring = '';
3825: if ($target eq 'web') {
3826: $currentstring = $token->[2];
3827: }
3828: return $currentstring;
3829: }
3830:
3831: #-- <span> tag (end tag required)
3832: sub start_span {
3833: my ($target,$token) = @_;
3834: my $currentstring = '';
3835: if ($target eq 'web') {
3836: $currentstring = $token->[4];
3837: }
3838: return $currentstring;
3839: }
3840:
3841: sub end_span {
3842: my ($target,$token) = @_;
3843: my $currentstring = '';
3844: if ($target eq 'web') {
3845: $currentstring = $token->[2];
3846: }
3847: return $currentstring;
3848: }
3849:
3850: #-- <tbody> tag (end tag optional)
3851: sub start_tbody {
3852: my ($target,$token) = @_;
3853: my $currentstring = '';
3854: if ($target eq 'web') {
3855: $currentstring = $token->[4];
3856: }
3857: return $currentstring;
3858: }
3859:
3860: sub end_tbody {
3861: my ($target,$token) = @_;
3862: my $currentstring = '';
3863: if ($target eq 'web') {
3864: $currentstring = $token->[2];
3865: }
3866: return $currentstring;
3867: }
3868:
3869: #-- <tfoot> tag (end tag optional)
3870: sub start_tfoot {
3871: my ($target,$token) = @_;
3872: my $currentstring = '';
3873: if ($target eq 'web') {
3874: $currentstring = $token->[4];
3875: }
3876: return $currentstring;
3877: }
3878:
3879: sub end_tfoot {
3880: my ($target,$token) = @_;
3881: my $currentstring = '';
3882: if ($target eq 'web') {
3883: $currentstring = $token->[2];
3884: }
3885: return $currentstring;
3886: }
3887:
3888: #-- <thead> tag (end tag optional)
3889: sub start_thead {
3890: my ($target,$token) = @_;
3891: my $currentstring = '';
3892: if ($target eq 'web') {
3893: $currentstring = $token->[4];
3894: }
3895: return $currentstring;
3896: }
3897:
3898: sub end_thead {
3899: my ($target,$token) = @_;
3900: my $currentstring = '';
3901: if ($target eq 'web') {
3902: $currentstring = $token->[2];
3903: }
3904: return $currentstring;
3905: }
3906:
3907: #-- <var> tag
3908: sub start_var {
3909: my ($target,$token) = @_;
3910: my $currentstring = '';
3911: if ($target eq 'web') {
3912: $currentstring = $token->[4];
3913: } elsif ($target eq 'tex') {
3914: $currentstring = '\textit{';
3915: }
3916: return $currentstring;
3917: }
3918:
3919: sub end_var {
3920: my ($target,$token) = @_;
3921: my $currentstring = '';
3922: if ($target eq 'web') {
3923: $currentstring = $token->[2];
3924: } elsif ($target eq 'tex') {
3925: $currentstring = '}';
3926: }
3927: return $currentstring;
3928: }
3929:
3930: #-- <wbr> tag (end tag forbidden)
3931: sub start_wbr {
3932: my ($target,$token) = @_;
3933: my $currentstring = '';
3934: if ($target eq 'web') {
3935: $currentstring = $token->[4];
3936: }
3937: return $currentstring;
3938: }
3939:
3940: sub end_wbr {
3941: my ($target,$token) = @_;
3942: my $currentstring = '';
3943: if ($target eq 'web') {
3944: $currentstring = $token->[2];
3945: }
3946: return $currentstring;
3947: }
3948:
3949: #-- <hideweboutput> tag
3950: sub start_hideweboutput {
3951: my ($target,$token) = @_;
3952: if ($target eq 'web') {
3953: &Apache::lonxml::startredirection();
3954: }
3955: return '';
3956: }
3957:
3958: sub end_hideweboutput {
3959: my ($target,$token) = @_;
3960: my $currentstring = '';
3961: if ($target eq 'web') {
3962: $currentstring = &Apache::lonxml::endredirection();
3963: }
3964: return '';
3965: }
3966:
3967:
3968: sub image_replication {
3969: my $src = shift;
3970: if (not -e $src) { &Apache::lonnet::repcopy($src); }
3971: #replicates eps or ps
3972: my $epssrc = my $pssrc = $src;
3973: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
3974: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
3975: if (not -e $epssrc && not -e $pssrc) {
3976: my $result=&Apache::lonnet::repcopy($epssrc);
3977: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
3978: }
3979: return '';
3980: }
3981: #
3982: # Get correct sizing parameter for an image given
3983: # it's initial ht. and wid. This allows sizing of
3984: # images that are generated on-the-fly (e.g. gnuplot)
3985: # as well as serving as a utility for image_size.
3986: #
3987: # Parameter:
3988: # height_param
3989: # width_param - Initial picture dimensions.
3990: # scaling - A scale factor.
3991: # parstack, - the current stack of tag attributes
3992: # from the xml parser
3993: # safeeval, - pointer to the safespace
3994: # depth, - from what level in the stack to look for attributes
3995: # (assumes -1 if unspecified)
3996: # cis - look for attrubutes case insensitively
3997: # (assumes false)
3998: #
3999: # Returns:
4000: # height, width - new dimensions.
4001: #
4002: sub resize_image {
4003: my ($height_param, $width_param, $scaling,
4004: $parstack, $safeeval, $depth, $cis) = @_;
4005:
4006: # First apply the scaling...
4007:
4008: $height_param = $height_param * $scaling;
4009: $width_param = $width_param * $scaling;
4010:
4011: #do we have any specified LaTeX size of the picture?
4012: my $toget='TeXwidth';
4013: if ($cis) {
4014: $toget=lc($toget);
4015: }
4016: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4017: $safeeval,$depth,$cis);
4018: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4019: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4020: $safeeval,$depth,$cis);
4021: #do we have any specified web size of the picture?
4022: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4023: $depth,1);
4024: if ($TeXwidth) {
4025: my $old_width_param=$width_param;
4026: if ($TeXwidth=~/(\d+)\s*\%/) {
4027: $width_param = $1*$env{'form.textwidth'}/100;
4028: } else {
4029: $width_param = $TeXwidth;
4030: }
4031: if ($TeXheight) {
4032: $height_param = $TeXheight;
4033: } elsif ($old_width_param) {
4034: $height_param=$TeXwidth/$old_width_param*$height_param;
4035: }
4036: } elsif ($TeXheight) {
4037: $height_param = $TeXheight;
4038: if ($height_param) {
4039: $width_param = $TeXheight/$height_param*$width_param;
4040: }
4041: } elsif ($width) {
4042: my $old_width_param=$width_param;
4043: $width_param = $width*$scaling;
4044: if ($old_width_param) {
4045: $height_param=$width_param/$old_width_param*$height_param;
4046: }
4047: }
4048: if ($width_param > $env{'form.textwidth'}) {
4049: my $old_width_param=$width_param;
4050: $width_param =0.95*$env{'form.textwidth'};
4051: if ($old_width_param) {
4052: $height_param=$width_param/$old_width_param*$height_param;
4053: }
4054: }
4055:
4056: return ($height_param, $width_param);
4057: }
4058:
4059: sub image_size {
4060: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4061:
4062: #size of image from gif/jpg/jpeg/png
4063: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4064: if (-e $ressrc) {
4065: $src = $ressrc;
4066: }
4067: my $image = Image::Magick->new;
4068: my $current_figure = $image->Read($src);
4069: my $width_param = $image->Get('width');
4070: my $height_param = $image->Get('height');
4071: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4072: undef($image);
4073:
4074: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4075: $scaling, $parstack, $safeeval,
4076: $depth, $cis);
4077:
4078: return ($height_param, $width_param);
4079: }
4080:
4081: sub image_width {
4082: my ($height, $width) = &image_size(@_);
4083: return $width;
4084: }
4085: # Not yet 100% sure this is correct in all circumstances..
4086: # due to my uncertainty about mods to image_size.
4087: #
4088: sub image_height {
4089: my ($height, $width) = &image_size(@_);
4090: return $height;
4091: }
4092:
4093: sub get_eps_image {
4094: my ($src)=@_;
4095: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4096:
4097: # In order to prevent the substitution of the alt text, we need to
4098: # be sure the orig_src file is on system now so:
4099:
4100: if (! -e $orig_src) {
4101: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4102: }
4103: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4104: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4105: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4106: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4107: &Apache::lonxml::debug("Filelocation gives: $src");
4108: if (! -e $src) {
4109: &Apache::lonxml::debug("$src does not exist");
4110: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4111: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4112: #if replication failed try to find ps file
4113: $src=~s/\.eps$/\.ps/;
4114: &Apache::lonxml::debug("Now looking for $src");
4115: #if no ps file try to replicate it.
4116: my $didrepcopy = &Apache::lonnet::repcopy($src);
4117: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4118: if ( (not -e $src) ||
4119: ($didrepcopy ne 'ok')) {
4120: &Apache::lonxml::debug("Failed to find or replicate $src");
4121:
4122: #if replication failed try to produce eps file dynamically
4123: $src=~s/\.ps$/\.eps/;
4124: my $temp_file;
4125: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4126: my $newsrc=$orig_src;
4127: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4128: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4129: print FILE "$newsrc\n";
4130: close FILE;
4131: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4132: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4133: if ($sext ne "") { # Put the ext. back in to uniquify.
4134: $src =~ s/\.eps$/$sext.eps/;
4135: }
4136: }
4137: }
4138: }
4139: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4140: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4141: return ($path.'/',$file);
4142: }
4143:
4144: sub eps_generation {
4145: my ($src,$file,$width_param) = @_;
4146: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4147: my $temp_file = Apache::File->new('>>'.$filename);
4148: print $temp_file "$src\n";
4149: my $newsrc = $src;
4150: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4151: $newsrc=~s/\/home\/httpd\/html\/res//;
4152: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4153: $newsrc=~s/\/\.\//\//;
4154: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4155: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4156: $newsrc=~s/\/home\/httpd\/lonUsers//;
4157: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4158: }
4159: if ($newsrc=~/\/userfiles\//) {
4160: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4161: } else {
4162: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4163: }
4164: }
4165:
4166: sub file_path {
4167: my $src=shift;
4168: my ($file,$path);
4169: if ($src =~ m!(.*)/([^/]*)$!) {
4170: $file = $2;
4171: $path = $1.'/';
4172: }
4173: return $file,$path;
4174: }
4175: # Converts a measurement in to mm from any of
4176: # the other valid LaTeX units of measure.
4177: # If the units of measure are missing from the
4178: # parameter, it is assumed to be in and returned
4179: # with mm units of measure
4180: sub recalc {
4181: my $argument = shift;
4182: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4183: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4184: my $value=$1;
4185: my $units=$2;
4186: if ($units eq 'cm') {
4187: $value*=10;
4188: } elsif ($units eq 'in') {
4189: $value*=25.4;
4190: } elsif ($units eq 'pc') {
4191: $value*=(25.4*12/72.27);
4192: } elsif ($units eq 'pt') {
4193: $value*=(25.4/72.27);
4194: }
4195: return $value.' mm';
4196: }
4197:
4198: sub LATEX_length {
4199: my $garbage=shift;
4200: $garbage=~s/^\s+$//;
4201: $garbage=~s/^\s+(\S.*)/$1/;#space before
4202: $garbage=~s/(.*\S)\s+$/$1/;#space after
4203: $garbage=~s/(\s)+/$1/;#only one space
4204: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4205: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4206: $garbage=~s/([^\\])\$/$1/g;#$
4207: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4208: $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;
4209: $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;
4210: $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;
4211: $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;
4212: $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;
4213: $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;
4214: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4215: #remove some other LaTeX command
4216: $garbage=~s|\\(\w+)\\|\\|g;
4217: $garbage=~s|\\(\w+)(\s*)|$2|g;
4218: $garbage=~s|\+|11|g;
4219: my $value=length($garbage);
4220: return $value;
4221: }
4222:
4223:
4224: # is_inside_of $tagstack $tag
4225: # This sub returns true if the current state of Xml processing
4226: # is inside of the tag.
4227: # Parameters:
4228: # tagstack - The tagstack from the parser.
4229: # tag - The tag (without the <>'s.).
4230: # Sample usage:
4231: # if (is_inside_of($tagstack "table")) {
4232: # # I'm in a table....
4233: # }
4234: sub is_inside_of {
4235: my ($tagstack, $tag) = @_;
4236: my @stack = @$tagstack;
4237: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4238: if ($stack[$i] eq $tag) {
4239: return 1;
4240: }
4241: }
4242: return 0;
4243: }
4244:
4245:
4246: 1;
4247: __END__
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