1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.309 2006/01/04 23:02:40 albertel 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: sub initialize_londefdef {
74: $Apache::londefdef::TD_redirection=0;
75: @Apache::londefdef::table = ();
76: $Apache::londefdef::select=0;
77: undef(@Apache::londefdef::description);
78: @Apache::londefdef::DD=(0);
79: @Apache::londefdef::DT=(0);
80: @Apache::londefdef::seenDT=(0);
81: $Apache::londefdef::list_index=0;
82: }
83:
84: #======================= TAG SUBROUTINES =====================
85: #-- <output>
86: sub start_output {
87: my ($target) = @_;
88: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
89: return '';
90: }
91: sub end_output {
92: my ($target) = @_;
93: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
94: return '';
95: }
96: #-- <m> tag
97: sub start_m {
98: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
99: my $currentstring = '';
100: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
101: if ($target eq 'web' || $target eq 'analyze') {
102: &Apache::lonxml::debug("M is starting with:$inside:");
103: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
104: if ($eval eq 'on') {
105: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
106: #&Apache::lonxml::debug("M is evaulated to:$inside:");
107: }
108: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
109: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
110: if ($Apache::lontexconvert::errorstring) {
111: &Apache::lonxml::warning("tth error: ".
112: $Apache::lontexconvert::errorstring);
113: $Apache::lontexconvert::errorstring='';
114: }
115: #&Apache::lonxml::debug("M is ends with:$currentstring:");
116: $Apache::lonxml::post_evaluate=0;
117: } elsif ($target eq 'tex') {
118: $currentstring = $inside;
119: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
120: if ($eval eq 'on') {
121: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
122: }
123: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
124: # detect simple math mode entry exits, and convert them
125: # to use \ensuremath
126: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
127: $currentstring=~s/^(\s*)\$/$1/;
128: $currentstring=~s/\$(\s*)$/$1/;
129: $currentstring='\ensuremath{'.$currentstring.'}';
130: }
131: $Apache::lonxml::post_evaluate=0;
132: }
133: return $currentstring;
134: }
135:
136: sub end_m {
137: my ($target,$token) = @_;
138: my $currentstring = '';
139: if ($target eq 'tex') {
140: $currentstring = "";
141: }
142: return $currentstring;
143: }
144:
145: sub start_tthoption {
146: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
147: my $result;
148: if ($target eq 'web') {
149: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
150: $style);
151: $inside=~s/^\s*//;
152: if ($env{'browser.mathml'}) {
153: &tth::ttmoptions($inside);
154: } else {
155: &tth::tthoptions($inside);
156: }
157: }
158: return $result;
159: }
160:
161: sub end_tthoption {
162: my ($target,$token) = @_;
163: my $result;
164: return $result;
165: }
166:
167: #-- <html> tag (end tag optional)
168: sub start_html {
169: my ($target,$token) = @_;
170: my $currentstring = '';
171: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
172: &Apache::lontexconvert::init_tth();
173: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
174: $currentstring = &Apache::lonxml::xmlbegin();
175: } elsif ($target eq 'tex') {
176: $currentstring .= '\documentclass[letterpaper,twoside]{article}';
177: if (($env{'form.latex_type'}=~'batchmode') ||
178: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
179: $currentstring .= '\newcommand{\keephidden}[1]{}'.
180: '\renewcommand{\deg}{$^{\circ}$}'.
181: '\usepackage{multirow}'.
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 $currentstring;
595: }
596:
597: # \begin{center} causes a new paragprah spacing that looks odd inside
598: # of a table cell
599: sub center_correction { return '\vspace*{-6 mm}'; }
600: #-- <center> tag (end tag required)
601: sub start_center {
602: my ($target,$token,$tagstack) = @_;
603: my $currentstring = &end_p(); # Close off any prior para.
604: if ($target eq 'web') {
605: $currentstring .= $token->[4];
606: } elsif ($target eq 'tex') {
607: if (&is_inside_of($tagstack, "table")) {
608: $currentstring .= ¢er_correction();
609: }
610: $currentstring .= '\begin{center}';
611: }
612: return $currentstring;
613: }
614:
615: sub end_center {
616: my ($target,$token,$tagstack) = @_;
617: my $currentstring = '';
618: if ($target eq 'web') {
619: $currentstring = $token->[2];
620: } elsif ($target eq 'tex') {
621: $currentstring = '\end{center}';
622: if (&is_inside_of($tagstack, "table")) {
623: $currentstring .= ¢er_correction();
624: }
625: }
626: return $currentstring;
627: }
628:
629: #-- <b> tag (end tag required)
630: # NOTE: In TeX mode disables internal <p>
631: sub start_b {
632: my ($target,$token) = @_;
633: my $currentstring = '';
634: if ($target eq 'web') {
635: $currentstring = $token->[4];
636: } elsif ($target eq 'tex') {
637: &disable_para();
638: $currentstring .= '\textbf{';
639: }
640: return $currentstring;
641: }
642:
643: sub end_b {
644: my ($target,$token) = @_;
645: my $currentstring = '';
646: if ($target eq 'web') {
647: $currentstring = $token->[2];
648: } elsif ($target eq 'tex') {
649: &enable_para();
650: $currentstring = '}';
651: }
652: return $currentstring;
653: }
654:
655: #-- <strong> tag (end tag required)
656: # NOTE: in TeX mode disables internal <p>
657: sub start_strong {
658: my ($target,$token) = @_;
659: my $currentstring = '';
660: if ($target eq 'web') {
661: $currentstring = $token->[4];
662: } elsif ($target eq 'tex') {
663: &disable_para();
664: $currentstring = '\textbf{';
665: }
666: return $currentstring;
667: }
668:
669: sub end_strong {
670: my ($target,$token) = @_;
671: my $currentstring = '';
672: if ($target eq 'web') {
673: $currentstring = $token->[2];
674: } elsif ($target eq 'tex') {
675: &enable_para();
676: $currentstring = '}';
677: }
678: return $currentstring;
679: }
680:
681: #-- <h1> tag (end tag required)
682: sub start_h1 {
683: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
684: my $currentstring = &end_p(); # Close off any prior para.
685: if ($target eq 'web') {
686: $currentstring .= $token->[4];
687: } elsif ($target eq 'tex') {
688: my $pre;
689: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
690: if ($align eq 'center') {
691: $pre='\begin{center}';
692: } elsif ($align eq 'left') {
693: $pre='\rlap{';
694: } elsif ($align eq 'right') {
695: $pre=' \hfill \llap{';
696: }
697: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
698: if (not defined $TeXsize) {$TeXsize="large";}
699: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
700: } elsif ($target eq 'meta') {
701: $currentstring.='<subject>';
702: &start_output($target);
703: }
704: return $currentstring;
705: }
706:
707: sub end_h1 {
708: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
709: my $currentstring = '';
710: if ($target eq 'web') {
711: $currentstring .= $token->[2];
712: } elsif ($target eq 'tex') {
713: my $post='\vskip 0 mm ';
714: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
715: if ($align eq 'center') {
716: $post='\end{center}';
717: } elsif ($align eq 'left') {
718: $post='} \hfill'.'\vskip 0 mm ';
719: } elsif ($align eq 'right') {
720: $post='}'.'\vskip 0 mm ';
721: }
722: $currentstring .= '}}'.$post;
723: } elsif ($target eq 'meta') {
724: &end_output($target);
725: $currentstring='</subject>';
726: }
727: return $currentstring;
728: }
729:
730: #-- <h2> tag
731: sub start_h2 {
732: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
733: my $currentstring = &end_p(); # Close off any prior para.
734: if ($target eq 'web') {
735: $currentstring .= $token->[4];
736: } elsif ($target eq 'tex') {
737: my $pre;
738: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
739: if ($align eq 'center') {
740: $pre='\begin{center}';
741: } elsif ($align eq 'left') {
742: $pre='\rlap{';
743: } elsif ($align eq 'right') {
744: $pre=' \hfill \llap{';
745: }
746: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
747: if (not defined $TeXsize) {$TeXsize="large";}
748: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
749: }
750: return $currentstring;
751: }
752:
753: sub end_h2 {
754: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
755: my $currentstring = '';
756: if ($target eq 'web') {
757: $currentstring .= $token->[2];
758: } elsif ($target eq 'tex') {
759: my $post='\vskip 0 mm ';
760: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
761: if ($align eq 'center') {
762: $post='\end{center}';
763: } elsif ($align eq 'left') {
764: $post='} \hfill'.'\vskip 0 mm ';
765: } elsif ($align eq 'right') {
766: $post='}'.'\vskip 0 mm ';
767: }
768: $currentstring .= '}}'.$post;
769: }
770: return $currentstring;
771: }
772:
773: #-- <h3> tag
774: sub start_h3 {
775: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
776: my $currentstring = &end_p(); # Close off any prior para.
777: if ($target eq 'web') {
778: $currentstring .= $token->[4];
779: } elsif ($target eq 'tex') {
780: my $pre;
781: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
782: if ($align eq 'center') {
783: $pre='\begin{center}';
784: } elsif ($align eq 'left') {
785: $pre='\rlap{';
786: } elsif ($align eq 'right') {
787: $pre=' \hfill \llap{';
788: }
789: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
790: if (not defined $TeXsize) {$TeXsize="large";}
791: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
792: }
793: return $currentstring;
794: }
795:
796: sub end_h3 {
797: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
798: my $currentstring = '';
799: if ($target eq 'web') {
800: $currentstring .= $token->[2];
801: } elsif ($target eq 'tex') {
802: my $post='\vskip 0 mm ';
803: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
804: if ($align eq 'center') {
805: $post='\end{center}';
806: } elsif ($align eq 'left') {
807: $post='} \hfill'.'\vskip 0 mm ';
808: } elsif ($align eq 'right') {
809: $post='}'.'\vskip 0 mm ';
810: }
811: $currentstring .= '}}'.$post;
812: }
813: return $currentstring;
814: }
815:
816: #-- <h4> tag
817: sub start_h4 {
818: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
819: my $currentstring = &end_p(); # Close off any prior para.
820: if ($target eq 'web') {
821: $currentstring .= $token->[4];
822: } elsif ($target eq 'tex') {
823: my $pre;
824: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
825: if ($align eq 'center') {
826: $pre='\begin{center}';
827: } elsif ($align eq 'left') {
828: $pre='\rlap{';
829: } elsif ($align eq 'right') {
830: $pre=' \hfill \llap{';
831: }
832: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
833: if (not defined $TeXsize) {$TeXsize="large";}
834: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
835: }
836: return $currentstring;
837: }
838:
839: sub end_h4 {
840: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
841: my $currentstring = '';
842: if ($target eq 'web') {
843: $currentstring .= $token->[2];
844: } elsif ($target eq 'tex') {
845: my $post='\vskip 0 mm ';
846: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
847: if ($align eq 'center') {
848: $post='\end{center}';
849: } elsif ($align eq 'left') {
850: $post='} \hfill'.'\vskip 0 mm ';
851: } elsif ($align eq 'right') {
852: $post='}'.'\vskip 0 mm ';
853: }
854: $currentstring .= '}}'.$post;
855: }
856: return $currentstring;
857: }
858:
859: #-- <h5> tag
860: sub start_h5 {
861: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
862: my $currentstring = &end_p(); # Close off any prior paras.
863: if ($target eq 'web') {
864: $currentstring .= $token->[4];
865: } elsif ($target eq 'tex') {
866: my $pre;
867: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
868: if ($align eq 'center') {
869: $pre='\begin{center}';
870: } elsif ($align eq 'left') {
871: $pre='\rlap{';
872: } elsif ($align eq 'right') {
873: $pre=' \hfill \llap{';
874: }
875: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
876: if (not defined $TeXsize) {$TeXsize="large";}
877: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
878: }
879: return $currentstring;
880: }
881:
882: sub end_h5 {
883: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
884: my $currentstring = '';
885: if ($target eq 'web') {
886: $currentstring .= $token->[2];
887: } elsif ($target eq 'tex') {
888: my $post='\vskip 0 mm ';
889: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
890: if ($align eq 'center') {
891: $post='\end{center}';
892: } elsif ($align eq 'left') {
893: $post='} \hfill'.'\vskip 0 mm ';
894: } elsif ($align eq 'right') {
895: $post='}'.'\vskip 0 mm ';
896: }
897: $currentstring .= '}}'.$post;
898: }
899: return $currentstring;
900: }
901:
902: #-- <h6> tag
903: sub start_h6 {
904: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
905: my $currentstring = &end_p(); # Close off any prior paras.
906: if ($target eq 'web') {
907: $currentstring .= $token->[4];
908: } elsif ($target eq 'tex') {
909: my $pre;
910: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
911: if ($align eq 'center') {
912: $pre='\begin{center}';
913: } elsif ($align eq 'left') {
914: $pre='\rlap{';
915: } elsif ($align eq 'right') {
916: $pre=' \hfill \llap{';
917: }
918: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
919: if (not defined $TeXsize) {$TeXsize="large";}
920: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
921: }
922: return $currentstring;
923: }
924:
925: sub end_h6 {
926: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
927: my $currentstring = '';
928: if ($target eq 'web') {
929: $currentstring .= $token->[2];
930: } elsif ($target eq 'tex') {
931: my $post='\vskip 0 mm ';
932: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
933: if ($align eq 'center') {
934: $post='\end{center}';
935: } elsif ($align eq 'left') {
936: $post='} \hfill'.'\vskip 0 mm ';
937: } elsif ($align eq 'right') {
938: $post='}'.'\vskip 0 mm ';
939: }
940: $currentstring .= '}}'.$post;
941: }
942: return $currentstring;
943: }
944:
945: #--- <cite> tag (end tag required)
946: sub start_cite {
947: my ($target,$token) = @_;
948: my $currentstring = '';
949: if ($target eq 'web') {
950: $currentstring .= $token->[4];
951: } elsif ($target eq 'tex') {
952: $currentstring .= '\textit{';
953: }
954: return $currentstring;
955: }
956:
957: sub end_cite {
958: my ($target,$token) = @_;
959: my $currentstring = '';
960: if ($target eq 'web') {
961: $currentstring .= $token->[2];
962: } elsif ($target eq 'tex') {
963: $currentstring .= '}';
964: }
965: return $currentstring;
966: }
967:
968: #-- <i> tag (end tag required)
969: sub start_i {
970: my ($target,$token) = @_;
971: my $currentstring = '';
972: if ($target eq 'web') {
973: $currentstring .= $token->[4];
974: } elsif ($target eq 'tex') {
975: $currentstring .= '\textit{';
976: }
977: return $currentstring;
978: }
979:
980: sub end_i {
981: my ($target,$token) = @_;
982: my $currentstring = '';
983: if ($target eq 'web') {
984: $currentstring .= $token->[2];
985: } elsif ($target eq 'tex') {
986: $currentstring .= '}';
987: }
988: return $currentstring;
989: }
990:
991: #-- <address> tag (end tag required)
992: sub start_address {
993: my ($target,$token) = @_;
994: my $currentstring = '';
995: if ($target eq 'web') {
996: $currentstring .= $token->[4];
997: } elsif ($target eq 'tex') {
998: $currentstring .= '\textit{';
999: }
1000: return $currentstring;
1001: }
1002:
1003: sub end_address {
1004: my ($target,$token) = @_;
1005: my $currentstring = '';
1006: if ($target eq 'web') {
1007: $currentstring .= $token->[2];
1008: } elsif ($target eq 'tex') {
1009: $currentstring .= '}';
1010: }
1011: return $currentstring;
1012: }
1013:
1014: #-- <dfn> tag (end tag required)
1015: sub start_dfn {
1016: my ($target,$token) = @_;
1017: my $currentstring = '';
1018: if ($target eq 'web') {
1019: $currentstring .= $token->[4];
1020: } elsif ($target eq 'tex') {
1021: $currentstring .= '\textit{';
1022: }
1023: return $currentstring;
1024: }
1025:
1026: sub end_dfn {
1027: my ($target,$token) = @_;
1028: my $currentstring = '';
1029: if ($target eq 'web') {
1030: $currentstring .= $token->[2];
1031: } elsif ($target eq 'tex') {
1032: $currentstring .= '}';
1033: }
1034: return $currentstring;
1035: }
1036:
1037: #-- <tt> tag (end tag required)
1038: sub start_tt {
1039: my ($target,$token) = @_;
1040: my $currentstring = '';
1041: if ($target eq 'web') {
1042: $currentstring .= $token->[4];
1043: } elsif ($target eq 'tex') {
1044: $currentstring .= '\texttt{';
1045: }
1046: return $currentstring;
1047: }
1048:
1049: sub end_tt {
1050: my ($target,$token) = @_;
1051: my $currentstring = '';
1052: if ($target eq 'web') {
1053: $currentstring .= $token->[2];
1054: } elsif ($target eq 'tex') {
1055: $currentstring .= '}';
1056: }
1057: return $currentstring;
1058: }
1059:
1060: #-- <kbd> tag (end tag required)
1061: sub start_kbd {
1062: my ($target,$token) = @_;
1063: my $currentstring = '';
1064: if ($target eq 'web') {
1065: $currentstring .= $token->[4];
1066: } elsif ($target eq 'tex') {
1067: $currentstring .= '\texttt{';
1068: }
1069: return $currentstring;
1070: }
1071:
1072: sub end_kbd {
1073: my ($target,$token) = @_;
1074: my $currentstring = '';
1075: if ($target eq 'web') {
1076: $currentstring .= $token->[2];
1077: } elsif ($target eq 'tex') {
1078: $currentstring .= '}';
1079: }
1080: return $currentstring;
1081: }
1082:
1083: #-- <code> tag (end tag required)
1084: sub start_code {
1085: my ($target,$token) = @_;
1086: my $currentstring = '';
1087: if ($target eq 'web') {
1088: $currentstring .= $token->[4];
1089: } elsif ($target eq 'tex') {
1090: $currentstring .= '\texttt{';
1091: }
1092: return $currentstring;
1093: }
1094:
1095: sub end_code {
1096: my ($target,$token) = @_;
1097: my $currentstring = '';
1098: if ($target eq 'web') {
1099: $currentstring .= $token->[2];
1100: } elsif ($target eq 'tex') {
1101: $currentstring .= '}';
1102: }
1103: return $currentstring;
1104: }
1105:
1106: #-- <em> tag (end tag required)
1107: sub start_em {
1108: my ($target,$token) = @_;
1109: my $currentstring = '';
1110: if ($target eq 'web') {
1111: $currentstring .= $token->[4];
1112: } elsif ($target eq 'tex') {
1113: $currentstring .= '\emph{';
1114: }
1115: return $currentstring;
1116: }
1117:
1118: sub end_em {
1119: my ($target,$token) = @_;
1120: my $currentstring = '';
1121: if ($target eq 'web') {
1122: $currentstring .= $token->[2];
1123: } elsif ($target eq 'tex') {
1124: $currentstring .= '}';
1125: }
1126: return $currentstring;
1127: }
1128:
1129: #-- <q> tag (end tag required)
1130: sub start_q {
1131: my ($target,$token) = @_;
1132: my $currentstring = '';
1133: if ($target eq 'web') {
1134: $currentstring .= $token->[4];
1135: } elsif ($target eq 'tex') {
1136: $currentstring .= '\emph{';
1137: }
1138: return $currentstring;
1139: }
1140:
1141: sub end_q {
1142: my ($target,$token) = @_;
1143: my $currentstring = '';
1144: if ($target eq 'web') {
1145: $currentstring .= $token->[2];
1146: } elsif ($target eq 'tex') {
1147: $currentstring .= '}';
1148: }
1149: return $currentstring;
1150: }
1151:
1152: # <p> is a bit strange since it does not require a closing </p>
1153: # However in latex, we must often output closing stuff to end
1154: # environments and {}'s etc. Therefore we do all the work
1155: # of figuring out the ending strings in the start tag processing,
1156: # and provide a mechanism to output the stop text external
1157: # to tag processing.
1158: #
1159: {
1160:
1161: my $closing_string = ''; # String required to close <p>
1162:
1163: # Some tags are <p> fragile meaning that <p> inside of them
1164: # does not work within TeX mode. This is managed via the
1165: # counter below:
1166: #
1167:
1168: my $para_disabled = 0;
1169:
1170: sub disable_para {
1171: $para_disabled++;
1172: }
1173: sub enable_para {
1174: $para_disabled--;
1175: }
1176:
1177:
1178: #-- <p> tag (end tag optional)
1179: #optional attribute - align="center|left|right"
1180: sub start_p {
1181: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1182: my $currentstring = '';
1183: if ($target eq 'web') {
1184: $currentstring .= &end_p(); # close off prior para if in progress.
1185: $currentstring .= $token->[4];
1186: if (! ($currentstring =~ /\//)) {
1187: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1188: }
1189: } elsif ($target eq 'tex' && !$para_disabled) {
1190: $currentstring .= &end_p(); # close off prior para if in progress.
1191: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1192: if ($align eq 'center') {
1193: $currentstring .='\begin{center}\par';
1194: $closing_string = '\end{center}';
1195: if (&is_inside_of($tagstack, "table")) {
1196: $currentstring = ¢er_correction().$currentstring;
1197: $closing_string .= ¢er_correction();
1198: }
1199: } elsif ($align eq 'right') {
1200: $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1201: $closing_string= '}}';
1202: } elsif ($align eq 'left') {
1203: $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
1204: $closing_string = '}\hfill}';
1205: } else {
1206: $currentstring.='\par ';
1207: $closing_string = '\strut\\\\\strut ';
1208: }
1209:
1210: }
1211: return $currentstring;
1212: }
1213: #
1214: # End paragraph processing just requires that we output the
1215: # closing string that was saved and blank it.
1216: sub end_p {
1217: # Note only 'tex' mode uses disable_para and enable_para
1218: # so we don't need to know the target in the check below:
1219:
1220: if (!$para_disabled) {
1221: my $current_string = $closing_string;
1222: $closing_string = ''; # Not in a para anymore.
1223: return $current_string;
1224: } else {
1225: return '';
1226: }
1227:
1228: }
1229: }
1230: #-- <br> tag (end tag forbidden)
1231: sub start_br {
1232: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1233: my $currentstring = '';
1234: if ($target eq 'web') {
1235: $currentstring .= $token->[4];
1236: } elsif ($target eq 'tex') {
1237: my @tempo=@$tagstack;
1238: my $signal=0;
1239: # Not going to factor this to is_inside_of since that would require
1240: # multiple stack traversals.
1241: #
1242: for (my $i=$#tempo;$i>=0;$i--) {
1243: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1244: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1245: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1246: $signal=1;
1247: last;
1248: }
1249: }
1250: if ($signal) {
1251: $currentstring .= ' \vskip 0 mm ';
1252: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1253: $currentstring .= '\strut \\\\ \strut ';
1254: }
1255: }
1256: return $currentstring;
1257: }
1258:
1259: sub end_br {
1260: my ($target,$token) = @_;
1261: my $currentstring = '';
1262: if ($target eq 'web') {
1263: $currentstring .= $token->[2];
1264: }
1265: return $currentstring;
1266: }
1267:
1268: #-- <big> tag (end tag required)
1269: sub start_big {
1270: my ($target,$token) = @_;
1271: my $currentstring = '';
1272: if ($target eq 'web') {
1273: $currentstring .= $token->[4];
1274: } elsif ($target eq 'tex') {
1275: $currentstring .= '{\large ';
1276: }
1277: return $currentstring;
1278: }
1279:
1280: sub end_big {
1281: my ($target,$token) = @_;
1282: my $currentstring = '';
1283: if ($target eq 'web') {
1284: $currentstring .= $token->[2];
1285: } elsif ($target eq 'tex') {
1286: $currentstring .= '}';
1287: }
1288: return $currentstring;
1289: }
1290:
1291: #-- <small> tag (end tag required)
1292: sub start_small {
1293: my ($target,$token) = @_;
1294: my $currentstring = '';
1295: if ($target eq 'web') {
1296: $currentstring .= $token->[4];
1297: } elsif ($target eq 'tex') {
1298: $currentstring .= '{\footnotesize ';
1299: }
1300: return $currentstring;
1301: }
1302:
1303: sub end_small {
1304: my ($target,$token) = @_;
1305: my $currentstring = '';
1306: if ($target eq 'web') {
1307: $currentstring .= $token->[2];
1308: } elsif ($target eq 'tex') {
1309: $currentstring .= '}';
1310: }
1311: return $currentstring;
1312: }
1313:
1314: #-- <basefont> tag (end tag forbidden)
1315: sub start_basefont {
1316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1317: my $currentstring = '';
1318: if ($target eq 'web') {
1319: $currentstring = $token->[4];
1320: } elsif ($target eq 'tex') {
1321: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1322: if (defined $basesize) {
1323: $currentstring = '{\\'.$basesize.' ';
1324: }
1325: }
1326: return $currentstring;
1327: }
1328:
1329: sub end_basefont {
1330: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1331: my $currentstring = '';
1332: if ($target eq 'web') {
1333: $currentstring = $token->[4];
1334: } elsif ($target eq 'tex') {
1335: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1336: if (defined $basesize) {
1337: $currentstring = '}';
1338: }
1339: }
1340: return $currentstring;
1341: }
1342:
1343: #-- <font> tag (end tag required)
1344: sub start_font {
1345: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1346: my $currentstring = '';
1347: if ($target eq 'web') {
1348: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1349: if ($face!~/symbol/i) {
1350: if (($env{'browser.fontenhance'} eq 'on') ||
1351: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1352: }
1353: $currentstring = $token->[4];
1354: } elsif ($target eq 'tex') {
1355: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1356: if (defined $fontsize) {
1357: $currentstring = '{\\'.$fontsize.' ';
1358: }
1359: }
1360: return $currentstring;
1361: }
1362:
1363: sub end_font {
1364: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1365: my $currentstring = '';
1366: if ($target eq 'web') {
1367: $currentstring = $token->[2];
1368: } elsif ($target eq 'tex') {
1369: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1370: if (defined $fontsize) {
1371: $currentstring = '}';
1372: }
1373: }
1374: return $currentstring;
1375: }
1376:
1377: #-- <strike> tag (end tag required)
1378: sub start_strike {
1379: my ($target,$token) = @_;
1380: my $currentstring = '';
1381: if ($target eq 'web') {
1382: $currentstring .= $token->[4];
1383: } elsif ($target eq 'tex') {
1384: &Apache::lonxml::startredirection();
1385: }
1386: return $currentstring;
1387: }
1388:
1389: sub end_strike {
1390: my ($target,$token) = @_;
1391: my $currentstring = '';
1392: if ($target eq 'web') {
1393: $currentstring .= $token->[2];
1394: } elsif ($target eq 'tex') {
1395: $currentstring=&Apache::lonxml::endredirection();
1396: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1397: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1398: $currentstring=~s/(\S)\s*$/$1\}/;
1399: }
1400: return $currentstring;
1401: }
1402:
1403: #-- <s> tag (end tag required)
1404: sub start_s {
1405: my ($target,$token) = @_;
1406: my $currentstring = '';
1407: if ($target eq 'web') {
1408: $currentstring .= $token->[4];
1409: } elsif ($target eq 'tex') {
1410: &Apache::lonxml::startredirection();
1411: }
1412: return $currentstring;
1413: }
1414:
1415: sub end_s {
1416: my ($target,$token) = @_;
1417: my $currentstring = '';
1418: if ($target eq 'web') {
1419: $currentstring .= $token->[2];
1420: } elsif ($target eq 'tex') {
1421: $currentstring=&Apache::lonxml::endredirection();
1422: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1423: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1424: $currentstring=~s/(\S)\s*$/$1\}/;
1425: }
1426: return $currentstring;
1427: }
1428:
1429: #-- <sub> tag (end tag required)
1430: sub start_sub {
1431: my ($target,$token) = @_;
1432: my $currentstring = '';
1433: if ($target eq 'web') {
1434: $currentstring .= $token->[4];
1435: } elsif ($target eq 'tex') {
1436: $currentstring .= '\ensuremath{_{';
1437: }
1438: return $currentstring;
1439: }
1440:
1441: sub end_sub {
1442: my ($target,$token) = @_;
1443: my $currentstring = '';
1444: if ($target eq 'web') {
1445: $currentstring .= $token->[2];
1446: } elsif ($target eq 'tex') {
1447: $currentstring .= '}}';
1448: }
1449: return $currentstring;
1450: }
1451:
1452: #-- <sup> tag (end tag required)
1453: sub start_sup {
1454: my ($target,$token) = @_;
1455: my $currentstring = '';
1456: if ($target eq 'web') {
1457: $currentstring .= $token->[4];
1458: } elsif ($target eq 'tex') {
1459: $currentstring .= '\ensuremath{^{';
1460: }
1461: return $currentstring;
1462: }
1463:
1464: sub end_sup {
1465: my ($target,$token) = @_;
1466: my $currentstring = '';
1467: if ($target eq 'web') {
1468: $currentstring .= $token->[2];
1469: } elsif ($target eq 'tex') {
1470: $currentstring .= '}}';
1471: }
1472: return $currentstring;
1473: }
1474:
1475: #-- <hr> tag (end tag forbidden)
1476: sub start_hr {
1477: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1478: my $currentstring = &end_p(); # End enclosing para.
1479: if ($target eq 'web') {
1480: $currentstring .= $token->[4];
1481: } elsif ($target eq 'tex') {
1482: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1483: if (defined $LaTeXwidth) {
1484: if ($LaTeXwidth=~/^%/) {
1485: substr($LaTeXwidth,0,1)='';
1486: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1487: }
1488: } else {
1489: $LaTeXwidth ='0.9\textwidth';
1490: }
1491: my ($pre,$post);
1492: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1493: if (($align eq 'center') || (not defined $align)) {
1494: $pre=''; $post='';
1495: } elsif ($align eq 'left') {
1496: $pre='\rlap{'; $post='} \hfill';
1497: } elsif ($align eq 'right') {
1498: $pre=' \hfill \llap{'; $post='}';
1499: }
1500: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1501: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1502: }
1503: return $currentstring;
1504: }
1505:
1506: sub end_hr {
1507: my ($target,$token) = @_;
1508: my $currentstring = '';
1509: if ($target eq 'web') {
1510: $currentstring .= $token->[2];
1511: }
1512: return $currentstring;
1513: }
1514:
1515: #-- <div> tag (end tag required)
1516: {
1517:
1518: # Since div can be nested, the stack below is used
1519: # in 'tex' mode to store the ending strings
1520: # for the div stack.
1521:
1522: my @div_end_stack;
1523:
1524: sub start_div {
1525: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1526: my $currentstring = &end_p(); # Close enclosing para.
1527: if ($target eq 'web') {
1528: $currentstring .= $token->[4];
1529: }
1530: if ($target eq 'tex') {
1531: # 4 possible alignments: left, right, center, and -missing-.
1532:
1533: my $endstring = '';
1534:
1535: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1536: $safeeval, undef, 1));
1537: if ($align eq 'center') {
1538: $currentstring .= '\begin{center}';
1539: $endstring = '\end{center}';
1540: if (&is_inside_of($tagstack, "table")) {
1541: $currentstring = ¢er_correction().$currentstring;
1542: $endstring .= ¢er_correction();
1543: }
1544: }
1545: elsif ($align eq 'right') {
1546: $currentstring .= '\begin{flushright}';
1547: $endstring .= '\end{flushright}';
1548: } elsif ($align eq 'left') {
1549: $currentstring .= '\begin{flushleft}';
1550: $endstring = '\end{flushleft}';
1551: } else {
1552:
1553: }
1554: $currentstring .= "\n"; # For human readability.
1555: $endstring = "\n$endstring\n"; # For human readability
1556: push(@div_end_stack, $endstring);
1557: }
1558: return $currentstring;
1559: }
1560:
1561: sub end_div {
1562: my ($target,$token) = @_;
1563: my $currentstring = '';
1564: if ($target eq 'web') {
1565: $currentstring .= $token->[2];
1566: }
1567: if ($target eq 'tex') {
1568: my $endstring = pop @div_end_stack;
1569: $currentstring .= $endstring;
1570: }
1571: return $currentstring;
1572: }
1573: }
1574:
1575: #-- <a> tag (end tag required)
1576: sub start_a {
1577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1578: my $currentstring = '';
1579: if ($target eq 'web') {
1580: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1581: undef,1);
1582: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1583: } elsif ($target eq 'tex') {
1584: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1585: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1586: if ($a=~/\S/) {
1587: $a=~s/([^\\])%/$1\\\%/g;
1588: $currentstring .= '\ref{URI: '.$a.'}';
1589: } elsif ($b=~/\S/) {
1590: $currentstring .= '\ref{Anchor: '.$b.'}';
1591: } else {
1592: $currentstring.='';
1593: }
1594: }
1595: return $currentstring;
1596: }
1597:
1598: sub end_a {
1599: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1600: my $currentstring = '';
1601: if ($target eq 'web') {
1602: $currentstring .= $token->[2];
1603: }
1604: return $currentstring;
1605: }
1606:
1607: #-- <li> tag (end tag optional)
1608: sub start_li {
1609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1610: my $currentstring = '';
1611: if ($target eq 'web') {
1612: $currentstring = $token->[4];
1613: } elsif ($target eq 'tex') {
1614: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1615: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1616: #FIXME need to support types i and I
1617: if ($type=~/disc/) {
1618: $currentstring .= ' \item[$\bullet$] ';
1619: } elsif ($type=~/circle/) {
1620: $currentstring .= ' \item[$\circ$] ';
1621: } elsif ($type=~/square/) {
1622: $currentstring .= ' \item[$\diamond$] ';
1623: } elsif ($type eq '1') {
1624: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1625: } elsif ($type eq 'A') {
1626: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1627: } elsif ($type eq 'a') {
1628: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1629: } elsif ($value ne '') {
1630: $currentstring .= ' \item['.$value.'] ';
1631: } else {
1632: $currentstring .= ' \item ';
1633: }
1634: $Apache::londefdef::list_index++;
1635: }
1636: return $currentstring;
1637: }
1638:
1639: sub end_li {
1640: my ($target,$token) = @_;
1641: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1642: if ($target eq 'web') {
1643: $currentstring .= $token->[2];
1644: }
1645: return $currentstring;
1646: }
1647:
1648: #-- <u> tag (end tag required)
1649: sub start_u {
1650: my ($target,$token) = @_;
1651: my $currentstring = '';
1652: if ($target eq 'web') {
1653: $currentstring .= $token->[4];
1654: } elsif ($target eq 'tex') {
1655: &Apache::lonxml::startredirection();
1656: }
1657: return $currentstring;
1658: }
1659:
1660: sub end_u {
1661: my ($target,$token) = @_;
1662: my $currentstring = '';
1663: if ($target eq 'web') {
1664: $currentstring .= $token->[2];
1665: } elsif ($target eq 'tex') {
1666: $currentstring=&Apache::lonxml::endredirection();
1667: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1668: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1669: $currentstring=~s/(\S)\s*$/$1\}/;
1670: }
1671: return $currentstring;
1672: }
1673:
1674: #-- <ul> tag (end tag required)
1675: sub start_ul {
1676: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1677: my $currentstring = &end_p(); # Close off enclosing list.
1678: if ($target eq 'web') {
1679: $currentstring .= $token->[4];
1680: } elsif ($target eq 'tex') {
1681: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1682: $Apache::londefdef::list_index=0;
1683: if ($TeXtype eq 'disc') {
1684: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1685: '\renewcommand{\labelitemii}{$\bullet$}'.
1686: '\renewcommand{\labelitemiii}{$\bullet$}'.
1687: '\renewcommand{\labelitemiv}{$\bullet$}';
1688: } elsif ($TeXtype eq 'circle') {
1689: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1690: '\renewcommand{\labelitemii}{$\circ$}'.
1691: '\renewcommand{\labelitemiii}{$\circ$}'.
1692: '\renewcommand{\labelitemiv}{$\circ$}';
1693: } elsif ($TeXtype eq 'square') {
1694: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1695: '\renewcommand{\labelitemii}{$\diamond$}'.
1696: '\renewcommand{\labelitemiii}{$\diamond$}'.
1697: '\renewcommand{\labelitemiv}{$\diamond$}';
1698: }
1699: $currentstring .= '\strut \begin{itemize}';
1700: }
1701: return $currentstring;
1702: }
1703:
1704: sub end_ul {
1705: my ($target,$token) = @_;
1706: my $currentstring = '';
1707: if ($target eq 'web') {
1708: $currentstring = $token->[2];
1709: } elsif ($target eq 'tex') {
1710: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1711: '\renewcommand{\labelitemii}{$\bullet$}'.
1712: '\renewcommand{\labelitemiii}{$\bullet$}'.
1713: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1714: }
1715: return $currentstring;
1716: }
1717:
1718: #-- <menu> tag (end tag required)
1719: sub start_menu {
1720: my ($target,$token) = @_;
1721: my $currentstring = '';
1722: if ($target eq 'web') {
1723: $currentstring = $token->[4];
1724: } elsif ($target eq 'tex') {
1725: $currentstring = " \\begin{itemize} ";
1726: }
1727: return $currentstring;
1728: }
1729:
1730: sub end_menu {
1731: my ($target,$token) = @_;
1732: my $currentstring = '';
1733: if ($target eq 'web') {
1734: $currentstring = $token->[2];
1735: } elsif ($target eq 'tex') {
1736: $currentstring = " \\end{itemize}";
1737: }
1738: return $currentstring;
1739: }
1740:
1741: #-- <dir> tag (end tag required)
1742: sub start_dir {
1743: my ($target,$token) = @_;
1744: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1745: if ($target eq 'web') {
1746: $currentstring .= $token->[4];
1747: } elsif ($target eq 'tex') {
1748: $currentstring .= " \\begin{itemize} ";
1749: }
1750: return $currentstring;
1751: }
1752:
1753: sub end_dir {
1754: my ($target,$token) = @_;
1755: my $currentstring = '';
1756: if ($target eq 'web') {
1757: $currentstring = $token->[2];
1758: } elsif ($target eq 'tex') {
1759: $currentstring = " \\end{itemize}";
1760: }
1761: return $currentstring;
1762: }
1763:
1764: #-- <ol> tag (end tag required)
1765: sub start_ol {
1766: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1767: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1768: if ($target eq 'web') {
1769: $currentstring .= $token->[4];
1770: } elsif ($target eq 'tex') {
1771: $Apache::londefdef::list_index=0;
1772: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1773: if ($type eq '1') {
1774: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1775: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1776: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1777: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1778: } elsif ($type eq 'A') {
1779: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1780: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1781: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1782: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1783: } elsif ($type eq 'a') {
1784: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1785: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1786: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1787: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1788: } elsif ($type eq 'i') {
1789: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1790: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1791: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1792: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1793: } elsif ($type eq 'I') {
1794: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1795: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1796: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1797: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1798: }
1799: $currentstring .= '\strut \begin{enumerate}';
1800: }
1801: return $currentstring;
1802: }
1803:
1804: sub end_ol {
1805: my ($target,$token) = @_;
1806: my $currentstring = '';
1807: if ($target eq 'web') {
1808: $currentstring = $token->[2];
1809: } elsif ($target eq 'tex') {
1810: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1811: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1812: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1813: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1814: }
1815: return $currentstring;
1816: }
1817:
1818: #-- <dl> tag (end tag required)
1819: sub start_dl {
1820: my ($target,$token) = @_;
1821: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1822: if ($target eq 'web') {
1823: $currentstring .= $token->[4];
1824: } elsif ($target eq 'tex') {
1825: $currentstring .= '\begin{description}';
1826: $Apache::londefdef::DL++;
1827: push(@Apache::londefdef::description,[]);
1828: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1829: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1830: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1831: }
1832: return $currentstring;
1833: }
1834:
1835: sub end_dl {
1836: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1837: my $currentstring = '';
1838: if ($target eq 'web') {
1839: $currentstring = $token->[2];
1840: } elsif ($target eq 'tex') {
1841: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1842: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1843: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1844: $currentstring.=' '.$element.' ';
1845: }
1846: pop(@Apache::londefdef::description);
1847: $currentstring.='\end{description}';
1848: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1849: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1850: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1851: $Apache::londefdef::DL--;
1852: }
1853: return $currentstring;
1854: }
1855:
1856: #-- <dt> tag (end tag optional)
1857: sub start_dt {
1858: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1859: my $currentstring='';
1860: if ($target eq 'web') {
1861: $currentstring = $token->[4];
1862: } elsif ($target eq 'tex') {
1863: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1864: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1865: &Apache::lonxml::startredirection();
1866: $Apache::londefdef::DT[-1]++;
1867: $Apache::londefdef::seenDT[-1]=1;
1868: }
1869: return $currentstring;
1870: }
1871:
1872: sub end_dt {
1873: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1874: my $currentstring = '';
1875: if ($target eq 'web') {
1876: $currentstring = $token->[2];
1877: } elsif ($target eq 'tex') {
1878: if ($Apache::londefdef::DT[-1]) {
1879: my $data=&item_cleanup();
1880: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1881: $Apache::londefdef::DT[-1]--;
1882: }
1883: }
1884: return $currentstring;
1885: }
1886:
1887: sub item_cleanup {
1888: my $item=&Apache::lonxml::endredirection();
1889: $item=~s/\\begin{center}//g;
1890: $item=~s/\\end{center}//g;
1891: return $item;
1892: }
1893:
1894: #-- <dd> tag (end tag optional)
1895: sub start_dd {
1896: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1897: my $currentstring = '';
1898: if ($target eq 'web') {
1899: $currentstring = $token->[4];
1900: } elsif ($target eq 'tex') {
1901: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1902: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1903: if (!$Apache::londefdef::seenDT[-1]) {
1904: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1905: }
1906: push(@{$Apache::londefdef::description[-1]},'');
1907: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1908: $Apache::londefdef::DD[-1]++;
1909: &Apache::lonxml::startredirection();
1910: }
1911: return $currentstring;
1912: }
1913:
1914: sub end_dd {
1915: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1916: my $currentstring = '';
1917: if ($target eq 'web') {
1918: $currentstring = $token->[2];
1919: } elsif ($target eq 'tex') {
1920: $Apache::londefdef::description[-1]->[-1].=
1921: &Apache::lonxml::endredirection().' \vskip 0mm ';
1922: $Apache::londefdef::DD[-1]--;
1923: }
1924: return $currentstring;
1925: }
1926:
1927: #-- <table> tag (end tag required)
1928: # <table> also ends any prior <p> that is not closed.
1929: # but, unless I allow <p>'s to nest, that's the
1930: # only way I could think of to allow <p> in
1931: # <tr> <th> bodies
1932: #
1933: #list of supported attributes: border,width,TeXwidth
1934: sub start_table {
1935: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1936: my $textwidth = '';
1937: my $currentstring = &end_p();
1938: if ($target eq 'web') {
1939: $currentstring .= $token->[4];
1940: } elsif ($target eq 'tex') {
1941: my $aa = {};
1942: push @Apache::londefdef::table, $aa;
1943: $Apache::londefdef::table[-1]{'row_number'} = -1;
1944: #maximum table's width (default coincides with text line length)
1945: if ($#Apache::londefdef::table==0) {
1946: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1947: $textwidth=~/(\d+\.?\d*)/;
1948: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1949: } else {
1950: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1951: #the maximum width of nested table is determined by LATeX width of parent cell
1952: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1953: } else {
1954: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1955: $textwidth=$Apache::londefdef::table[-2]{'width'};
1956: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1957: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1958: }
1959: }
1960: }
1961:
1962: # width either comes forced from the TeXwidth or the width parameters.
1963: # in either case it can be a percentage or absolute width.
1964:
1965: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1966: if (!defined($TeXwidth)) {
1967: $TeXwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);
1968: if (!defined($TeXwidth)) { $TeXwidth = $textwidth; }
1969: } else {
1970: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1971: }
1972: if ($TeXwidth=~/%/) {
1973: $Apache::londefdef::table[-1]{'percent'}=1;
1974: $TeXwidth=~/(\d+)/;
1975: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1976: } else {
1977: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1978: }
1979:
1980: #table's border
1981: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1982: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1983: unless (defined $border) { $border = 0; }
1984: if ($border) {
1985: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1986: $Apache::londefdef::table[-1]{'vinc'} = '&';
1987: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1988: } else {
1989: $Apache::londefdef::table[-1]{'hinc'} = '';
1990: $Apache::londefdef::table[-1]{'vinc'} = '&';
1991: $Apache::londefdef::table[-1]{'vvinc'} = '';
1992: }
1993: if ($#Apache::londefdef::table==0) {
1994: # Note that \newline seems to destroy the alignment envs.
1995: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1996: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1997: }
1998: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1999: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2000: $Apache::londefdef::table[-1]{'objectlen'}=[];
2001: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2002: $Apache::londefdef::table[-1]{'maxlen'}=[];
2003: $Apache::londefdef::table[-1]{'minlen'}=[];
2004: $Apache::londefdef::table[-1]{'content'}=[];
2005: $Apache::londefdef::table[-1]{'align'}=[];
2006: $currentstring.='\keephidden{NEW TABLE ENTRY}';
2007:
2008:
2009: }
2010: return $currentstring;
2011: }
2012:
2013: sub end_table {
2014: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2015: my $currentstring = '';
2016: if ($target eq 'web') {
2017: $currentstring = $token->[2];
2018: } elsif ($target eq 'tex') {
2019: my $inmemory = '';
2020: my $output = '';
2021: my $WARNING='';
2022: # &debug_dump_table($Apache::londefdef::table[-1]);
2023: #width of columns from TeXwidth attributes
2024:
2025: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2026: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2027: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2028: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2029: }
2030: }
2031: }
2032: #free space and number of empty columns
2033: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2034: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2035: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2036: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2037: $empty_columns++;
2038: } else {
2039: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2040: }
2041: }
2042: #boundaries for contents columns
2043: my @min_len=();#columns can not be narrower
2044: my @max_len=();#maximum length of column
2045: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2046: my ($localmin,$localmax)=(0,0);
2047: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2048: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2049: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2050: }
2051: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2052: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2053: }
2054: }
2055: push @min_len, $localmin;
2056: push @max_len, $localmax;
2057: }
2058: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2059: my $localmin=0,;
2060: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2061: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2062: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2063: }
2064: }
2065: if ($max_len[$jn]<$localmin) {
2066: $max_len[$jn]=$localmin;
2067: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2068: }#object size is bigger
2069: if ($min_len[$jn]<$localmin) {
2070: $min_len[$jn]=$localmin;
2071: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2072: }#object size is bigger
2073: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2074: $min_len[$jn]=0;
2075: $max_len[$jn]=0;
2076: }
2077: }
2078: #final adjustment of column width
2079: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2080: my @adjust=();
2081: #step 1. adjustment by maximum value
2082: my $space_neeeded=0;
2083: for (my $jn=0;$jn<=$#max_len;$jn++) {
2084: $space_neeeded=$space_neeeded+$max_len[$jn];
2085: }
2086: if ($space_neeeded<=$available_space) {
2087: for (my $jn=0;$jn<=$#max_len;$jn++) {
2088: if ($fwidth[$jn]==0) {
2089: $fwidth[$jn]=$max_len[$jn];
2090: }
2091: }
2092: } else {
2093: #step 2. adjustment by minimum value (estimation)
2094: $space_neeeded=0;
2095: for (my $jn=0;$jn<=$#min_len;$jn++) {
2096: $space_neeeded+=$min_len[$jn];
2097: }
2098: if ($space_neeeded>$available_space) {
2099: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2100: for (my $jn=0;$jn<=$#max_len;$jn++) {
2101: if ($fwidth[$jn]==0) {
2102: $fwidth[$jn]=$min_len[$jn];
2103: }
2104: }
2105: #check if we have objects which can be scaled
2106: my $how_many_to_scale=0;
2107: my @to_scale=();
2108: for (my $jn=0;$jn<=$#max_len;$jn++) {
2109: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2110: $how_many_to_scale++;
2111: push @to_scale, $jn;
2112: }
2113: }
2114: if ($how_many_to_scale>0) {
2115: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2116: foreach my $jn (@to_scale) {
2117: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2118: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2119: if ($1 ne '') {
2120: my $current_length=&recalc($1);
2121: $current_length=~/(\d+\.?\d*)/;
2122: $current_length=$current_length-$space_to_adjust;
2123: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2124: }
2125: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2126: if ($1 ne '') {
2127: my $current_length=$1;
2128: $current_length=$current_length-$space_to_adjust;
2129: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2130: }
2131: }
2132: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2133: }
2134: }
2135: } else {
2136: #step 3. adjustment over minimal + corrections
2137: my $enlarge_coef=$available_space/$space_neeeded;
2138: my $acsessive=0;
2139: for (my $jn=0;$jn<=$#min_len;$jn++) {
2140: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2141: if ($adjust[$jn]>$max_len[$jn]) {
2142: $fwidth[$jn]=$max_len[$jn];
2143: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2144: $adjust[$jn]=0;
2145: }
2146: }
2147: if ($acsessive>0) {
2148: #we have an excess of space and can redistribute it
2149: my $notempty_columns=0;
2150: for (my $jn=0;$jn<=$#min_len;$jn++) {
2151: if ($adjust[$jn]!=0) {
2152: $notempty_columns++;
2153: }
2154: }
2155: my $per_column=$acsessive/$notempty_columns;
2156: for (my $jn=0;$jn<=$#min_len;$jn++) {
2157: if ($adjust[$jn]!=0) {
2158: $adjust[$jn]+=$per_column;
2159: $fwidth[$jn]=$adjust[$jn];
2160: }
2161: }
2162: } else {
2163: for (my $jn=0;$jn<=$#min_len;$jn++) {
2164: $fwidth[$jn]=$adjust[$jn];
2165: }
2166: }
2167: }
2168: }
2169: #use all available width if it is defined in % or as TeXwidth
2170: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2171: my $current=0;
2172: for (my $i=0;$i<=$#fwidth;$i++) {
2173: $current+=$fwidth[$i];
2174: }
2175: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2176: for (my $i=0;$i<=$#fwidth;$i++) {
2177: $fwidth[$i]*=$coef;
2178: }
2179: }
2180: #removing of empty columns if allowed
2181: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2182: if ($permission eq 'yes') {
2183: my @cleaned_table=();
2184: my @cleaned_header=();
2185: my $colind=0;
2186: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2187: if ($fwidth[$jn]!=0) {
2188: #we need to copy column
2189: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2190: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2191: $cleaned_header[$colind]=$fwidth[$jn];
2192: }
2193: $colind++;
2194: }
2195: }
2196: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2197: @fwidth=@cleaned_header;
2198: }
2199: #construct header of the table
2200: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2201: for (my $in=0;$in<=$#fwidth;$in++) {
2202: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2203: }
2204: $header_of_table .= '}';
2205: #fill the table
2206: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2207: my $have_rowspan = 0;
2208: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2209: #
2210: # Do the appropriate magic if this has a colspan
2211: #
2212: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2213: if ($colspan > 1) {
2214: $output .= '\multicolumn{'.
2215: $colspan
2216: .'}{|l|}{';
2217: }
2218: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2219:
2220: # Start a rowspan if necessary:
2221:
2222: if ($rowspan > 1) {
2223: $have_rowspan++;
2224: $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
2225: }
2226: if (($rowspan eq '^') || ($rowspan eq '_')) {
2227: $have_rowspan++;
2228: }
2229:
2230: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2231: $output.=¢er_correction().'\begin{center}';
2232: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2233: $output.=' \hfill \llap{'
2234: }
2235: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2236: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2237: $output.='\end{center}'.¢er_correction();
2238: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2239: $output.='} ';
2240: }
2241: # Close off any open multirow:
2242:
2243: if ($rowspan > 1) {
2244: $output .= '}';
2245: }
2246: # Close off the colspan...
2247: #
2248: if ($colspan > 1) {
2249: $output .= '}';
2250: $jn += $colspan-1; # Adjust for number of rows really left.
2251: }
2252: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2253: }
2254: # If have_rowspan > 0, and borders are on, then
2255: # we need to do more than put an \hline at the bottom of row.
2256: # we need to do the appropriate \cline to ensure that
2257: # the spanned rows don't have \hlines through them.
2258:
2259: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2260: $output .= ' \\\\ ';
2261: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2262: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2263: if (($rowspan <= 1) || ($rowspan eq '_')) {
2264: my $column = $jn+1;
2265: $output .= '\cline{'.$column.'-'.$column.'} ';
2266: }
2267: }
2268:
2269: } else {
2270: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2271: }
2272: }
2273: # Note that \newline destroys alignment env's produced by e.g. <div>
2274: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2275: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2276: if ($#Apache::londefdef::table > 0) {
2277: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2278: # Figure out max/and min width by summing us and then
2279: # apply that to the current column of the table we nest in
2280: # if it's larger than the current width or the current width
2281: # is undefined.
2282: #
2283: my $min_nested_width = 0;
2284: my $max_nested_width = 0;
2285: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2286: $min_nested_width += $min_len[$col];
2287: $max_nested_width += $max_len[$col];
2288:
2289: }
2290: # Fudge in an extra 5 mm for borders etc:
2291:
2292: $min_nested_width += 5;
2293: $max_nested_width += 5;
2294:
2295: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2296: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2297: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2298: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2299: }
2300: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2301: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2302: }
2303:
2304: pop @Apache::londefdef::table;
2305: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2306: } else {
2307: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2308: pop @Apache::londefdef::table;
2309: undef @Apache::londefdef::table;
2310: }
2311: }
2312: return $currentstring;
2313: }
2314:
2315: #-- <tr> tag (end tag optional)
2316: sub start_tr {
2317: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2318: my $currentstring = '';
2319: if ($target eq 'web') {
2320: $currentstring = $token->[4];
2321: } elsif ($target eq 'tex') {
2322: $Apache::londefdef::table[-1]{'row_number'}++;
2323: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2324: if ($alignchar ne '') {
2325: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2326: } else {
2327: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2328: }
2329: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2330: #
2331: # Need to save the number of table columns to preserve the max # columns.
2332: #
2333: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2334: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2335: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2336: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2337: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2338: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2339: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2340: }
2341: return $currentstring;
2342: }
2343:
2344: sub end_tr {
2345: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2346: my $currentstring = &end_p(); # Close any pending <p> in the row.
2347: if ($target eq 'web') {
2348: $currentstring .= $token->[2];
2349: } elsif ($target eq 'tex') {
2350: if ($Apache::londefdef::TD_redirection) {
2351: &end_td_tex($parstack,$parser,$safeeval);
2352: }
2353: # Counter columns must be the maximum number of columns seen
2354: # in the table so far so:
2355: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2356: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2357: }
2358:
2359:
2360:
2361: }
2362: return $currentstring;
2363: }
2364:
2365: #-- <td> tag (end tag optional)
2366: sub start_td {
2367: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2368: my $currentstring = '';
2369: if ($target eq 'web') {
2370: $currentstring = $token->[4];
2371: } elsif ($target eq 'tex') {
2372: $Apache::londefdef::TD_redirection = 1;
2373: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2374: }
2375: return $currentstring;
2376: }
2377:
2378: sub tag_check {
2379: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2380: my @ar=@$parstack;
2381: for (my $i=$#ar-1;$i>=0;$i--) {
2382: if (lc($$tagstack[$i]) eq $good_tag) {
2383: &start_td_tex($parstack,$parser,$safeeval);
2384: last;
2385: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2386: splice @ar, $i+1;
2387: &end_td_tex(\@ar,$parser,$safeeval);
2388: &start_td_tex($parstack,$parser,$safeeval);
2389: last;
2390: }
2391: }
2392: return '';
2393: }
2394:
2395: sub start_td_tex {
2396: my ($parstack,$parser,$safeeval) = @_;
2397: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2398: if ($alignchar eq '') {
2399: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2400: }
2401: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2402: $Apache::londefdef::table[-1]{'counter_columns'}++;
2403: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2404: if (defined $TeXwidth) {
2405: my $current_length=&recalc($TeXwidth);
2406: $current_length=~/(\d+\.?\d*)/;
2407: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2408: }
2409: &Apache::lonxml::startredirection();
2410: return '';
2411: }
2412:
2413: sub end_td_tex {
2414: my ($parstack,$parser,$safeeval) = @_;
2415: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2416: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2417: my $data = &Apache::lonxml::endredirection();
2418:
2419: # The rowspan array of the table indicates which cells are part of a span.
2420: # n indicates the start of a span set of n rows.
2421: # ^ indicates a cell that continues a span set.
2422: # _ indicates the cell is at the bottom of a span set.
2423: # If this and subsequent cells are part of a rowspan, we must
2424: # push along the row until we find one that is not.
2425:
2426: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2427: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2428: # Part of a span.
2429: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2430: $current_column++;
2431: }
2432: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2433:
2434:
2435:
2436: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2437: if (!$rowspan) {
2438: $rowspan = 1;
2439: }
2440:
2441:
2442:
2443: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] = $rowspan;
2444: for (my $i = 1; $i < $rowspan; $i++) {
2445: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column] = '^';
2446: if ($i == ($rowspan-1)) {
2447: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column] = '_';
2448: }
2449: }
2450:
2451: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2452: if (defined $TeXwidth) {
2453: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2454: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2455: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2456: } else {
2457: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2458: my $garbage_data=$data;
2459: my $fwidth=0;
2460: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2461: my $current_length=&recalc($1);
2462: $current_length=~/(\d+\.?\d*)/;
2463: if ($fwidth<$1) {$fwidth=$1;}
2464: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2465: }
2466: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2467: my $current_length=$1;
2468: if ($fwidth<$current_length) {$fwidth=$current_length;}
2469: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2470: }
2471: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2472: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2473: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2474: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2475: } elsif ($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)*/) {
2476: my $garbage_data=$data;
2477: my $fwidth=0;
2478: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2479: my $current_length=&recalc($1);
2480: $current_length=~/(\d+\.?\d*)/;
2481: if ($fwidth<$1) {$fwidth=$1;}
2482: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2483: }
2484: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2485: my $current_length=&recalc($1);
2486: $current_length=~/(\d+\.?\d*)/;
2487: if ($fwidth<$1) {$fwidth=$1;}
2488: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2489: }
2490: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2491: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2492: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2493: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2494: $data=~s/\\\\\s*$//;
2495: } else {
2496: $data=~s/^\s+(\S.*)/$1/;
2497: $data=~s/(.*\S)\s+$/$1/;
2498: $data=~s/(\s)+/$1/;
2499: my ($current_length,$min_length)=(0,0);
2500: if ($data=~/\\vskip/) {
2501: my $newdata=$data;
2502: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2503: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2504: foreach my $elementdata (@newdata) {
2505: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2506: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2507: my @words=split(/ /,$elementdata);
2508: foreach my $word (@words) {
2509: my $lengthword=2.5*&LATEX_length($word);
2510: if ($min_length<$lengthword) {$min_length=$lengthword;}
2511: }
2512: }
2513: } else {
2514: $current_length=2.5*&LATEX_length($data);
2515: my @words=split(/ /,$data);
2516: foreach my $word (@words) {
2517: my $lengthword=2*&LATEX_length($word);
2518: if ($min_length<$lengthword) {$min_length=$lengthword;}
2519: }
2520: }
2521: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2522: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2523: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2524: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2525: }
2526: }
2527: # Substitute all of the tables nested in this cell in their appropriate places.
2528:
2529:
2530: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2531: for (my $in=0; $in<=$nested_count; $in++) {
2532: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2533: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2534: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2535: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2536:
2537: }
2538: # Should be be killing off the 'include' elements as they're used up?
2539:
2540: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2541:
2542: # Get the column and row spans.
2543: # Colspan can be done via \multicolumn if I can figure out the data structs.
2544:
2545: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2546: if (!$colspan) {
2547: $colspan = 1;
2548: }
2549:
2550:
2551: # the colspan array will indicate how many columns will be spanned by this
2552: # cell..this requires that counter_columns also be adjusted accordingly
2553: # so that the next bunch of text goes in the right cell. Note that since
2554: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2555: #
2556:
2557: $Apache::londefdef::table[-1]{'colspan'}[$current_row][$current_column] = $colspan;
2558: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2559:
2560: # Put empty text in spanned cols.
2561:
2562: for (my $i = 0; $i < ($colspan -1); $i++) {
2563: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2564: }
2565:
2566:
2567: return '';
2568: }
2569:
2570: sub end_td {
2571: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2572: my $currentstring = '';
2573: if ($target eq 'web') {
2574: $currentstring = $token->[2];
2575: } elsif ($target eq 'tex') {
2576: $Apache::londefdef::TD_redirection =0;
2577: &end_td_tex($parstack,$parser,$safeeval);
2578: }
2579: return $currentstring;
2580: }
2581:
2582: #-- <th> tag (end tag optional)
2583: sub start_th {
2584: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2585: my $currentstring = '';
2586: if ($target eq 'web') {
2587: $currentstring = $token->[4];
2588: } elsif ($target eq 'tex') {
2589: $Apache::londefdef::TD_redirection = 1;
2590: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2591: }
2592: return $currentstring;
2593: }
2594:
2595: sub tagg_check {
2596: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2597: my @ar=@$parstack;
2598: for (my $i=$#ar-1;$i>=0;$i--) {
2599: if (lc($$tagstack[$i]) eq $good_tag) {
2600: &start_th_tex($parstack,$parser,$safeeval);
2601: last;
2602: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2603: splice @ar, $i+1;
2604: &end_th_tex(\@ar,$parser,$safeeval);
2605: &start_th_tex($parstack,$parser,$safeeval);
2606: last;
2607: }
2608: }
2609: return '';
2610: }
2611:
2612: sub start_th_tex {
2613: my ($parstack,$parser,$safeeval) = @_;
2614: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2615: if ($alignchar eq '') {
2616: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2617: }
2618: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2619: $Apache::londefdef::table[-1]{'counter_columns'}++;
2620: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2621: if (defined $TeXwidth) {
2622: my $current_length=&recalc($TeXwidth);
2623: $current_length=~/(\d+\.?\d*)/;
2624: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2625: }
2626: &Apache::lonxml::startredirection();
2627: return '';
2628: }
2629:
2630: sub end_th_tex {
2631: my ($parstack,$parser,$safeeval) = @_;
2632: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2633: my $data=&Apache::lonxml::endredirection();
2634: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2635: if (defined $TeXwidth) {
2636: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2637: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2638: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2639: } else {
2640: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2641: my $garbage_data=$data;
2642: my $fwidth=0;
2643: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2644: my $current_length=&recalc($1);
2645: $current_length=~/(\d+\.?\d*)/;
2646: if ($fwidth<$1) {$fwidth=$1;}
2647: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2648: }
2649: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2650: my $current_length=$1;
2651: if ($fwidth<$current_length) {$fwidth=$current_length;}
2652: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2653: }
2654: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2655: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2656: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2657: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2658: } else {
2659: $data=~s/^\s+(\S.*)/$1/;
2660: $data=~s/(.*\S)\s+$/$1/;
2661: $data=~s/(\s)+/$1/;
2662: my ($current_length,$min_length)=(0,0);
2663: if ($data=~/\\vskip/) {
2664: my $newdata=$data;
2665: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2666: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2667: foreach my $elementdata (@newdata) {
2668: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2669: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2670: my @words=split(/ /,$elementdata);
2671: foreach my $word (@words) {
2672: my $lengthword=2.5*&LATEX_length($word);
2673: if ($min_length<$lengthword) {$min_length=$lengthword;}
2674: }
2675: }
2676: } else {
2677: $current_length=2.5*&LATEX_length($data);
2678: my @words=split(/ /,$data);
2679: foreach my $word (@words) {
2680: my $lengthword=2*&LATEX_length($word);
2681: if ($min_length<$lengthword) {$min_length=$lengthword;}
2682: }
2683: }
2684: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2685: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2686: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2687: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2688: }
2689: }
2690: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2691: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2692: }
2693: #make data bold
2694: $data='\textbf{'.$data.'}';
2695: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2696: return'';
2697: }
2698:
2699: sub end_th {
2700: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2701: my $currentstring = &end_p(); # Close any open <p> in the row.
2702: if ($target eq 'web') {
2703: $currentstring .= $token->[2];
2704: } elsif ($target eq 'tex') {
2705: $Apache::londefdef::TD_redirection =0;
2706: &end_th_tex($parstack,$parser,$safeeval);
2707: }
2708: return $currentstring;
2709: }
2710:
2711: #-- <img> tag (end tag forbidden)
2712: #
2713: # Render the <IMG> tag.
2714: # <IMG> has the following attributes (in addition to the
2715: # standard HTML ones:
2716: # TeXwrap - Governs how the tex target will try to wrap text around
2717: # horizontally aligned images.
2718: # TeXwidth - The width of the image when rendered for print (mm).
2719: # TeXheight - The height of the image when rendered for print (mm)
2720: # (Note there seems to also be support for this as a % of page size)
2721: #
2722: sub start_img {
2723: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2724: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2725: undef,1);
2726: if (not $src and ($target eq 'web' or $target eq 'tex')) {
2727: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2728: return '';
2729: }
2730: &Apache::lonxml::extlink($src);
2731: my $currentstring = '';
2732: my $scaling = .3;
2733:
2734: # Render unto browsers that which are the browser's...
2735:
2736: if ($target eq 'web') {
2737: if ($env{'browser.imagesuppress'} ne 'on') {
2738: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2739: } else {
2740: my $alttag= &Apache::lonxml::get_param
2741: ('alt',$parstack,$safeeval,undef,1);
2742: unless ($alttag) {
2743: $alttag=&Apache::lonmeta::alttag
2744: ($Apache::lonxml::pwd[-1],$src);
2745: }
2746: $currentstring.='[IMAGE: '.$alttag.']';
2747: }
2748:
2749: # and render unto TeX that which is LaTeX
2750:
2751: } elsif ($target eq 'tex') {
2752: #
2753: # The alignment will require some superstructure to be put around
2754: # the \includegraphics stuff. At present we can only partially
2755: # simulate the alignments offered by html.
2756: #
2757: #
2758: my $align = lc(&Apache::lonxml::get_param('align',
2759: $parstack,
2760: $safeeval,
2761: undef,1));
2762: if(!$align) {
2763: if (&is_inside_of($tagstack, "table")) {
2764: $align = "right"; # Force wraptext use.
2765: } else {
2766: $align = "bottom"; # This is html's default so it's ours too.
2767: }
2768: }
2769: #
2770: &Apache::lonxml::debug("Alignemnt = $align");
2771: # LaTeX's image/text wrapping is really bad since it wants to
2772: # make figures float.
2773: # The user has the optional parameter (applicable only to l/r
2774: # alignment to use the picins/parpic directive to get wrapped text
2775: # this is also imperfect.. that's why we give them a choice...
2776: # so they can't yell at us for our choice.
2777: #
2778: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2779: $parstack,
2780: $safeeval,
2781: undef,0);
2782: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2783: if(!$latex_rendering) {
2784: $latex_rendering = "texwrap";
2785: }
2786: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2787:
2788: #if original gif/jpg/png file exist do following:
2789: my $origsrc=$src;
2790: my ($path,$file) = &get_eps_image($src);
2791: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2792: &Apache::lonxml::debug("path = $path file = $file src = $src");
2793: if (-e $src) {
2794: &Apache::lonxml::debug("$src exists");
2795: my ($height_param,$width_param)=
2796: &image_size($origsrc,0.3,$parstack,$safeeval);
2797: my $destpath = $path;
2798: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2799: my $destfile = $file;
2800: $destfile =~ s/ /\_/g;
2801: my $size;
2802: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2803: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2804: $size='['.$size;
2805: $size=~s/,$/]/;
2806: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2807: .'\includegraphics'.$size.'{'.$destfile.'} ';
2808:
2809: # If there's an alignment specification we need to honor it here.
2810: # For the horizontal alignments, we will also honor the
2811: # value of the latex specfication. The default is parbox,
2812: # and that's used for illegal values too.
2813: #
2814: # Even though we set a default alignment value, the user
2815: # could have given us an illegal value. In that case we
2816: # just use the default alignment of bottom..
2817: if ($align eq "top") {
2818: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2819: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2820: my $offset = $height_param/2;
2821: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2822: } elsif ($align eq "left") {
2823: if ($latex_rendering eq "parpic") {
2824: $currentstring = '\parpic[l]{'.$currentstring.'}';
2825: } else { # wrapfig render
2826: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2827: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2828: }
2829: } elsif ($align eq "right") {
2830: if ($latex_rendering eq "parpic") {
2831: $currentstring = '\parpic[r]{'.$currentstring.'}';
2832: } else { # wrapfig rendering
2833: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2834: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2835:
2836: }
2837: } else { # Bottom is also default.
2838: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2839: }
2840: } else {
2841: &Apache::lonxml::debug("$src does not exist");
2842: #original image file doesn't exist so check the alt attribute
2843: my $alt =
2844: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2845: unless ($alt) {
2846: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2847: }
2848:
2849: if ($alt) { $currentstring .= ' '.$alt.' '; }
2850: }
2851:
2852: # And here's where the semi-quote breaks down: allow the user
2853: # to edit the beast as well by rendering the problem for edit:
2854: } elsif ($target eq 'edit') {
2855: $currentstring .=&Apache::edit::tag_start($target,$token);
2856: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2857: &Apache::edit::browse('src',undef,'alt').' '.
2858: &Apache::edit::search('src',undef,'alt').'<br />';
2859: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2860: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2861: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2862: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2863: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2864: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2865: ['','bottom','middle','top','left','right'],$token,5);
2866: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2867: ['', 'parbox', 'parpic'], $token, 2);
2868: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2869: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2870: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2871: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2872: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2873:
2874:
2875: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2876: if ($width) { $currentstring.=' width="'.$width.'" '; }
2877: if ($height) { $currentstring.=' height="'.$height.'" '; }
2878: $currentstring .= ' />';
2879: } elsif ($target eq 'modified') {
2880: my ($osrc,$owidth,$oheight)=
2881: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2882: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2883: $safeeval,'src','alt','align',
2884: 'TeXwidth','TeXheight', 'TeXwrap',
2885: 'width','height');
2886: my ($nsrc,$nwidth,$nheight)=
2887: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2888: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2889: &image_replication($loc);
2890: my ($iwidth,$iheight);
2891: if (-e $loc) {
2892: my $image = Image::Magick->new;
2893: $image->Read($loc);
2894: ($iwidth, $iheight) = ($image->Get('width'),
2895: $image->Get('height'));
2896: }
2897: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2898: # changed image or no size specified,
2899: # if they didn't explicitly change the
2900: # width or height use the ones from the image
2901: if ($iwidth && $iheight) {
2902: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2903: $token->[2]{'width'} = $iwidth;$ctag=1;
2904: }
2905: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2906: $token->[2]{'height'}=$iheight;$ctag=1;
2907: }
2908: }
2909: }
2910: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2911: # if we don't have a width or height
2912: if ($iwidth && $cwidth && !$cheight) {
2913: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2914: }
2915: if ($iheight && $cheight && !$cwidth) {
2916: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2917: }
2918: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2919: }
2920:
2921: return $currentstring;
2922: }
2923:
2924: sub end_img {
2925: my ($target,$token) = @_;
2926: my $currentstring = '';
2927: if ($target eq 'web') {
2928: $currentstring = $token->[2];
2929: } elsif ($target eq 'tex') {
2930: $currentstring = '';
2931: }
2932: return $currentstring;
2933: }
2934:
2935: #-- <applet> tag (end tag required)
2936: sub start_applet {
2937: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2938:
2939: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2940: &Apache::lonxml::extlink($code);
2941: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2942: undef,1);
2943: &Apache::lonxml::extlink($archive);
2944: my $currentstring = '';
2945: if ($target eq 'web') {
2946: if ($env{'browser.appletsuppress'} ne 'on') {
2947: $currentstring = &Apache::lonenc::encrypt_ref($token,
2948: {'code'=>$code,
2949: 'archive'=>$archive}
2950: );
2951: } else {
2952: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2953: $safeeval,undef,1);
2954: unless ($alttag) {
2955: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2956: $code);
2957: }
2958: $currentstring='[APPLET: '.$alttag.']';
2959: }
2960: } elsif ($target eq 'tex') {
2961: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2962: $safeeval,undef,1);
2963: unless ($alttag) {
2964: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2965: undef,1);
2966: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2967: $code);
2968: }
2969: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2970: '.}\end{center}';
2971: }
2972: return $currentstring;
2973: }
2974:
2975: sub end_applet {
2976: my ($target,$token) = @_;
2977: my $currentstring = '';
2978: if ($target eq 'web') {
2979: $currentstring = $token->[2];
2980: } elsif ($target eq 'tex') {
2981: }
2982: return $currentstring;
2983: }
2984:
2985: #-- <embed> tag (end tag optional/required)
2986: sub start_embed {
2987: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2988: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2989: &Apache::lonxml::extlink($src);
2990: my $currentstring = '';
2991: if ($target eq 'web') {
2992: if ($env{'browser.embedsuppress'} ne 'on') {
2993: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2994: } else {
2995: my $alttag=&Apache::lonxml::get_param
2996: ('alt',$parstack,$safeeval,undef,1);
2997: unless ($alttag) {
2998: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2999: }
3000: $currentstring='[EMBED: '.$alttag.']';
3001: }
3002: } elsif ($target eq 'tex') {
3003: }
3004: return $currentstring;
3005: }
3006:
3007: sub end_embed {
3008: my ($target,$token) = @_;
3009: my $currentstring = '';
3010: if ($target eq 'web') {
3011: $currentstring = $token->[2];
3012: } elsif ($target eq 'tex') {
3013: }
3014: return $currentstring;
3015: }
3016:
3017: #-- <param> tag (end tag forbidden)
3018: sub start_param {
3019: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3020: if (&Apache::lonxml::get_param('name',$parstack,
3021: $safeeval,undef,1)=~/^cabbase$/i) {
3022: my $value=&Apache::lonxml::get_param('value',$parstack,
3023: $safeeval,undef,1);
3024: &Apache::lonxml::extlink($value);
3025: }
3026:
3027: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3028: &Apache::lonxml::extlink($src);
3029: my $currentstring = '';
3030: if ($target eq 'web') {
3031: my %toconvert;
3032: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3033: if ($src) { $toconvert{'src'}= $src; }
3034: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3035: undef,1);
3036: if ($name=~/^cabbase$/i) {
3037: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3038: $safeeval,undef,1);
3039: }
3040: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3041: } elsif ($target eq 'tex') {
3042: }
3043: return $currentstring;
3044: }
3045:
3046: sub end_param {
3047: my ($target,$token) = @_;
3048: my $currentstring = '';
3049: if ($target eq 'web') {
3050: $currentstring = $token->[2];
3051: } elsif ($target eq 'tex') {
3052: }
3053: return $currentstring;
3054: }
3055:
3056: #-- <allow> tag
3057: sub start_allow {
3058: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3059: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3060: &Apache::lonxml::extlink($src);
3061:
3062: if ($target eq 'tex') { &image_replication($src); }
3063: my $result;
3064: if ($target eq 'edit') {
3065: $result .=&Apache::edit::tag_start($target,$token);
3066: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3067: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3068: } elsif ($target eq 'modified') {
3069: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3070: $safeeval,'src');
3071: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3072: }
3073: return $result;
3074: }
3075:
3076: sub end_allow {
3077: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3078: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3079: return '';
3080: }
3081:
3082: #-- Frames (end tag required)
3083: #-- <frameset>
3084: sub start_frameset {
3085: my ($target,$token) = @_;
3086: my $currentstring = ''; # Close any pending para.
3087: if ($target eq 'web') {
3088: if (!$Apache::lonxml::registered &&
3089: $env{'request.state'} eq 'published') {
3090: $currentstring.='<head>'.
3091: &Apache::lonmenu::registerurl(undef,$target).'</head>';
3092: }
3093: my $onLoad='';
3094: foreach my $key (keys(%{$token->[2]})) {
3095: if ($key =~ /^onload$/i) {
3096: $onLoad.=$token->[2]->{$key}.';';
3097: delete($token->[2]->{$key});
3098: }
3099: }
3100: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
3101: my $onUnload='';
3102: foreach my $key (keys(%{$token->[2]})) {
3103: if ($key =~ /^onunload$/i) {
3104: $onUnload.=$token->[2]->{$key}.';';
3105: delete($token->[2]->{$key});
3106: }
3107: }
3108: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
3109: ';'.$onUnload;
3110:
3111: $currentstring .= '<'.$token->[1];
3112: foreach (keys %{$token->[2]}) {
3113: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
3114: }
3115: $currentstring.='>';
3116: }
3117: return $currentstring;
3118: }
3119:
3120: sub end_frameset {
3121: my ($target,$token) = @_;
3122: my $currentstring = '';
3123: if ($target eq 'web') {
3124: $currentstring = $token->[2];
3125: }
3126: return $currentstring;
3127: }
3128:
3129: #-- <xmp> (end tag required)
3130: sub start_xmp {
3131: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3132: my $currentstring = '';
3133: if ($target eq 'web') {
3134: $currentstring .= $token->[4];
3135: } elsif ($target eq 'tex') {
3136: $currentstring .= '\begin{verbatim}';
3137: }
3138: return $currentstring;
3139: }
3140:
3141: sub end_xmp {
3142: my ($target,$token) = @_;
3143: my $currentstring = '';
3144: if ($target eq 'web') {
3145: $currentstring .= $token->[2];
3146: } elsif ($target eq 'tex') {
3147: $currentstring .= '\end{verbatim}';
3148: }
3149: return $currentstring;
3150: }
3151:
3152: #-- <pre> (end tag required)
3153: sub start_pre {
3154: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3155: my $currentstring = &end_p(); # close off pending <p>
3156: if ($target eq 'web') {
3157: $currentstring .= $token->[4];
3158: } elsif ($target eq 'tex') {
3159: $currentstring .= '\begin{verbatim}';
3160: }
3161: return $currentstring;
3162: }
3163:
3164: sub end_pre {
3165: my ($target,$token) = @_;
3166: my $currentstring = '';
3167: if ($target eq 'web') {
3168: $currentstring .= $token->[2];
3169: } elsif ($target eq 'tex') {
3170: $currentstring .= '\end{verbatim}';
3171: }
3172: return $currentstring;
3173: }
3174:
3175: #-- <insert>
3176: sub start_insert {
3177: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3178: my $currentstring = '';
3179: if ($target eq 'web') {
3180: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3181: $currentstring .= '<b>'.$display.'</b>';;
3182: }
3183: return $currentstring;
3184: }
3185:
3186: sub end_insert {
3187: my ($target,$token) = @_;
3188: my $currentstring = '';
3189: if ($target eq 'web') {
3190: $currentstring .= '';
3191: }
3192: return $currentstring;
3193: }
3194:
3195: #-- <externallink>
3196: sub start_externallink {
3197: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3198: my $currentstring = '';
3199: if ($target eq 'web') {
3200: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3201: $currentstring .= '<b>'.$display.'</b>';;
3202: }
3203: return $currentstring;
3204: }
3205:
3206: sub end_externallink {
3207: my ($target,$token) = @_;
3208: my $currentstring = '';
3209: if ($target eq 'web') {
3210: $currentstring .= '';
3211: }
3212: return $currentstring;
3213: }
3214:
3215: #-- <blankspace heigth="">
3216: sub start_blankspace {
3217: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3218: my $currentstring = &end_p(); # closes off any unclosed <p>
3219: if ($target eq 'tex') {
3220: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3221: $currentstring .= '\vskip '.$howmuch.' ';
3222: }
3223: return $currentstring;
3224: }
3225:
3226: sub end_blankspace {
3227: my ($target,$token) = @_;
3228: my $currentstring = '';
3229: if ($target eq 'tex') {
3230: $currentstring .= '';
3231: }
3232: return $currentstring;
3233: }
3234:
3235: #-- <abbr> tag (end tag required)
3236: sub start_abbr {
3237: my ($target,$token) = @_;
3238: my $currentstring = '';
3239: if ($target eq 'web') {
3240: $currentstring = $token->[4];
3241: }
3242: return $currentstring;
3243: }
3244:
3245: sub end_abbr {
3246: my ($target,$token) = @_;
3247: my $currentstring = '';
3248: if ($target eq 'web') {
3249: $currentstring = $token->[2];
3250: }
3251: return $currentstring;
3252: }
3253:
3254: #-- <acronym> tag (end tag required)
3255: sub start_acronym {
3256: my ($target,$token) = @_;
3257: my $currentstring = '';
3258: if ($target eq 'web') {
3259: $currentstring = $token->[4];
3260: }
3261: return $currentstring;
3262: }
3263:
3264: sub end_acronym {
3265: my ($target,$token) = @_;
3266: my $currentstring = '';
3267: if ($target eq 'web') {
3268: $currentstring = $token->[2];
3269: }
3270: return $currentstring;
3271: }
3272:
3273: #-- <area> tag (end tag forbidden)
3274: sub start_area {
3275: my ($target,$token) = @_;
3276: my $currentstring = '';
3277: if ($target eq 'web') {
3278: $currentstring = $token->[4];
3279: }
3280: return $currentstring;
3281: }
3282:
3283: sub end_area {
3284: my ($target,$token) = @_;
3285: my $currentstring = '';
3286: if ($target eq 'web') {
3287: $currentstring = $token->[2];
3288: }
3289: return $currentstring;
3290: }
3291:
3292: #-- <base> tag (end tag forbidden)
3293: sub start_base {
3294: my ($target,$token) = @_;
3295: my $currentstring = '';
3296: if ($target eq 'web') {
3297: $currentstring = $token->[4];
3298: }
3299: return $currentstring;
3300: }
3301:
3302: sub end_base {
3303: my ($target,$token) = @_;
3304: my $currentstring = '';
3305: if ($target eq 'web') {
3306: $currentstring = $token->[2];
3307: }
3308: return $currentstring;
3309: }
3310:
3311: #-- <bdo> tag (end tag required)
3312: sub start_bdo {
3313: my ($target,$token) = @_;
3314: my $currentstring = '';
3315: if ($target eq 'web') {
3316: $currentstring = $token->[4];
3317: }
3318: return $currentstring;
3319: }
3320:
3321: sub end_bdo {
3322: my ($target,$token) = @_;
3323: my $currentstring = '';
3324: if ($target eq 'web') {
3325: $currentstring = $token->[2];
3326: }
3327: return $currentstring;
3328: }
3329:
3330: #-- <bgsound> tag (end tag optional)
3331: sub start_bgsound {
3332: my ($target,$token) = @_;
3333: my $currentstring = '';
3334: if ($target eq 'web') {
3335: $currentstring = $token->[4];
3336: }
3337: return $currentstring;
3338: }
3339:
3340: sub end_bgsound {
3341: my ($target,$token) = @_;
3342: my $currentstring = '';
3343: if ($target eq 'web') {
3344: $currentstring = $token->[2];
3345: }
3346: return $currentstring;
3347: }
3348:
3349: #-- <blink> tag (end tag required)
3350: sub start_blink {
3351: my ($target,$token) = @_;
3352: my $currentstring = '';
3353: if ($target eq 'web') {
3354: $currentstring = $token->[4];
3355: }
3356: return $currentstring;
3357: }
3358:
3359: sub end_blink {
3360: my ($target,$token) = @_;
3361: my $currentstring = '';
3362: if ($target eq 'web') {
3363: $currentstring = $token->[2];
3364: }
3365: return $currentstring;
3366: }
3367:
3368: #-- <blockquote> tag (end tag required)
3369: sub start_blockquote {
3370: my ($target,$token) = @_;
3371: my $currentstring = &end_p(); # Close any unclosed <p>
3372: if ($target eq 'web') {
3373: $currentstring .= $token->[4];
3374: }
3375: return $currentstring;
3376: }
3377:
3378: sub end_blockquote {
3379: my ($target,$token) = @_;
3380: my $currentstring = '';
3381: if ($target eq 'web') {
3382: $currentstring = $token->[2];
3383: }
3384: return $currentstring;
3385: }
3386:
3387: #-- <button> tag (end tag required)
3388: sub start_button {
3389: my ($target,$token) = @_;
3390: my $currentstring = '';
3391: if ($target eq 'web') {
3392: $currentstring = $token->[4];
3393: }
3394: return $currentstring;
3395: }
3396:
3397: sub end_button {
3398: my ($target,$token) = @_;
3399: my $currentstring = '';
3400: if ($target eq 'web') {
3401: $currentstring = $token->[2];
3402: }
3403: return $currentstring;
3404: }
3405:
3406: #-- <caption> tag (end tag required)
3407: sub start_caption {
3408: my ($target,$token) = @_;
3409: my $currentstring = '';
3410: if ($target eq 'web') {
3411: $currentstring = $token->[4];
3412: }
3413: return $currentstring;
3414: }
3415:
3416: sub end_caption {
3417: my ($target,$token) = @_;
3418: my $currentstring = '';
3419: if ($target eq 'web') {
3420: $currentstring = $token->[2];
3421: }
3422: return $currentstring;
3423: }
3424:
3425: #-- <col> tag (end tag forbdden)
3426: sub start_col {
3427: my ($target,$token) = @_;
3428: my $currentstring = '';
3429: if ($target eq 'web') {
3430: $currentstring = $token->[4];
3431: }
3432: return $currentstring;
3433: }
3434:
3435: sub end_col {
3436: my ($target,$token) = @_;
3437: my $currentstring = '';
3438: if ($target eq 'web') {
3439: $currentstring = $token->[2];
3440: }
3441: return $currentstring;
3442: }
3443:
3444: #-- <colgroup> tag (end tag optional)
3445: sub start_colgroup {
3446: my ($target,$token) = @_;
3447: my $currentstring = '';
3448: if ($target eq 'web') {
3449: $currentstring = $token->[4];
3450: }
3451: return $currentstring;
3452: }
3453:
3454: sub end_colgroup {
3455: my ($target,$token) = @_;
3456: my $currentstring = '';
3457: if ($target eq 'web') {
3458: $currentstring = $token->[2];
3459: }
3460: return $currentstring;
3461: }
3462:
3463: #-- <del> tag (end tag required)
3464: sub start_del {
3465: my ($target,$token) = @_;
3466: my $currentstring = '';
3467: if ($target eq 'web') {
3468: $currentstring = $token->[4];
3469: }
3470: return $currentstring;
3471: }
3472:
3473: sub end_del {
3474: my ($target,$token) = @_;
3475: my $currentstring = '';
3476: if ($target eq 'web') {
3477: $currentstring = $token->[2];
3478: }
3479: return $currentstring;
3480: }
3481:
3482: #-- <fieldset> tag (end tag required)
3483: sub start_fieldset {
3484: my ($target,$token) = @_;
3485: my $currentstring = '';
3486: if ($target eq 'web') {
3487: $currentstring = $token->[4];
3488: }
3489: return $currentstring;
3490: }
3491:
3492: sub end_fieldset {
3493: my ($target,$token) = @_;
3494: my $currentstring = '';
3495: if ($target eq 'web') {
3496: $currentstring = $token->[2];
3497: }
3498: return $currentstring;
3499: }
3500:
3501: #-- <frame> tag (end tag forbidden)
3502: sub start_frame {
3503: my ($target,$token) = @_;
3504: my $currentstring = '';
3505: if ($target eq 'web') {
3506: $currentstring = $token->[4];
3507: }
3508: return $currentstring;
3509: }
3510:
3511: sub end_frame {
3512: my ($target,$token) = @_;
3513: my $currentstring = '';
3514: if ($target eq 'web') {
3515: $currentstring = $token->[2];
3516: }
3517: return $currentstring;
3518: }
3519:
3520: #-- <iframe> tag (end tag required)
3521: sub start_iframe {
3522: my ($target,$token) = @_;
3523: my $currentstring = '';
3524: if ($target eq 'web') {
3525: $currentstring = $token->[4];
3526: }
3527: return $currentstring;
3528: }
3529:
3530: sub end_iframe {
3531: my ($target,$token) = @_;
3532: my $currentstring = '';
3533: if ($target eq 'web') {
3534: $currentstring = $token->[2];
3535: }
3536: return $currentstring;
3537: }
3538:
3539: #-- <ins> tag (end tag required)
3540: sub start_ins {
3541: my ($target,$token) = @_;
3542: my $currentstring = '';
3543: if ($target eq 'web') {
3544: $currentstring = $token->[4];
3545: }
3546: return $currentstring;
3547: }
3548:
3549: sub end_ins {
3550: my ($target,$token) = @_;
3551: my $currentstring = '';
3552: if ($target eq 'web') {
3553: $currentstring = $token->[2];
3554: }
3555: return $currentstring;
3556: }
3557:
3558: #-- <isindex> tag (end tag forbidden)
3559: sub start_isindex {
3560: my ($target,$token) = @_;
3561: my $currentstring = '';
3562: if ($target eq 'web') {
3563: $currentstring = $token->[4];
3564: }
3565: return $currentstring;
3566: }
3567:
3568: sub end_isindex {
3569: my ($target,$token) = @_;
3570: my $currentstring = '';
3571: if ($target eq 'web') {
3572: $currentstring = $token->[2];
3573: }
3574: return $currentstring;
3575: }
3576:
3577: #-- <keygen> tag (end tag forbidden)
3578: sub start_keygen {
3579: my ($target,$token) = @_;
3580: my $currentstring = '';
3581: if ($target eq 'web') {
3582: $currentstring = $token->[4];
3583: }
3584: return $currentstring;
3585: }
3586:
3587: sub end_keygen {
3588: my ($target,$token) = @_;
3589: my $currentstring = '';
3590: if ($target eq 'web') {
3591: $currentstring = $token->[2];
3592: }
3593: return $currentstring;
3594: }
3595:
3596: #-- <label> tag
3597: sub start_label {
3598: my ($target,$token) = @_;
3599: my $currentstring = '';
3600: if ($target eq 'web') {
3601: $currentstring = $token->[4];
3602: }
3603: return $currentstring;
3604: }
3605:
3606: sub end_label {
3607: my ($target,$token) = @_;
3608: my $currentstring = '';
3609: if ($target eq 'web') {
3610: $currentstring = $token->[2];
3611: }
3612: return $currentstring;
3613: }
3614:
3615: #-- <layer> tag (end tag required)
3616: sub start_layer {
3617: my ($target,$token) = @_;
3618: my $currentstring = '';
3619: if ($target eq 'web') {
3620: $currentstring = $token->[4];
3621: }
3622: return $currentstring;
3623: }
3624:
3625: sub end_layer {
3626: my ($target,$token) = @_;
3627: my $currentstring = '';
3628: if ($target eq 'web') {
3629: $currentstring = $token->[2];
3630: }
3631: return $currentstring;
3632: }
3633:
3634: #-- <legend> tag (end tag required)
3635: sub start_legend {
3636: my ($target,$token) = @_;
3637: my $currentstring = '';
3638: if ($target eq 'web') {
3639: $currentstring = $token->[4];
3640: }
3641: return $currentstring;
3642: }
3643:
3644: sub end_legend {
3645: my ($target,$token) = @_;
3646: my $currentstring = '';
3647: if ($target eq 'web') {
3648: $currentstring = $token->[2];
3649: }
3650: return $currentstring;
3651: }
3652:
3653: #-- <link> tag (end tag forbidden)
3654: sub start_link {
3655: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3656: my $currentstring = '';
3657: if ($target eq 'web') {
3658: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3659: undef,1);
3660: &Apache::lonxml::extlink($href);
3661: $currentstring = $token->[4];
3662: }
3663: return $currentstring;
3664: }
3665:
3666: sub end_link {
3667: my ($target,$token) = @_;
3668: my $currentstring = '';
3669: if ($target eq 'web') {
3670: $currentstring = $token->[2];
3671: }
3672: return $currentstring;
3673: }
3674:
3675: #-- <marquee> tag (end tag optional)
3676: sub start_marquee {
3677: my ($target,$token) = @_;
3678: my $currentstring = '';
3679: if ($target eq 'web') {
3680: $currentstring = $token->[4];
3681: }
3682: return $currentstring;
3683: }
3684:
3685: sub end_marquee {
3686: my ($target,$token) = @_;
3687: my $currentstring = '';
3688: if ($target eq 'web') {
3689: $currentstring = $token->[2];
3690: }
3691: return $currentstring;
3692: }
3693:
3694: #-- <multicol> tag (end tag required)
3695: sub start_multicol {
3696: my ($target,$token) = @_;
3697: my $currentstring = &end_p(); # Close any pending <p>
3698: if ($target eq 'web') {
3699: $currentstring .= $token->[4];
3700: }
3701: return $currentstring;
3702: }
3703:
3704: sub end_multicol {
3705: my ($target,$token) = @_;
3706: my $currentstring = '';
3707: if ($target eq 'web') {
3708: $currentstring = $token->[2];
3709: }
3710: return $currentstring;
3711: }
3712:
3713: #-- <nobr> tag (end tag required)
3714: sub start_nobr {
3715: my ($target,$token) = @_;
3716: my $currentstring = '';
3717: if ($target eq 'web') {
3718: $currentstring = $token->[4];
3719: } elsif ($target eq 'tex') {
3720: $currentstring='\mbox{';
3721: }
3722: return $currentstring;
3723: }
3724:
3725: sub end_nobr {
3726: my ($target,$token) = @_;
3727: my $currentstring = '';
3728: if ($target eq 'web') {
3729: $currentstring = $token->[2];
3730: } elsif ($target eq 'tex') {
3731: $currentstring='}';
3732: }
3733: return $currentstring;
3734: }
3735:
3736: #-- <noembed> tag (end tag required)
3737: sub start_noembed {
3738: my ($target,$token) = @_;
3739: my $currentstring = '';
3740: if ($target eq 'web') {
3741: $currentstring = $token->[4];
3742: }
3743: return $currentstring;
3744: }
3745:
3746: sub end_noembed {
3747: my ($target,$token) = @_;
3748: my $currentstring = '';
3749: if ($target eq 'web') {
3750: $currentstring = $token->[2];
3751: }
3752: return $currentstring;
3753: }
3754:
3755: #-- <noframes> tag (end tag required)
3756: sub start_noframes {
3757: my ($target,$token) = @_;
3758: my $currentstring = '';
3759: if ($target eq 'web') {
3760: $currentstring = $token->[4];
3761: }
3762: return $currentstring;
3763: }
3764:
3765: sub end_noframes {
3766: my ($target,$token) = @_;
3767: my $currentstring = '';
3768: if ($target eq 'web') {
3769: $currentstring = $token->[2];
3770: }
3771: return $currentstring;
3772: }
3773:
3774: #-- <nolayer> tag (end tag required)
3775: sub start_nolayer {
3776: my ($target,$token) = @_;
3777: my $currentstring = '';
3778: if ($target eq 'web') {
3779: $currentstring = $token->[4];
3780: }
3781: return $currentstring;
3782: }
3783:
3784: sub end_nolayer {
3785: my ($target,$token) = @_;
3786: my $currentstring = '';
3787: if ($target eq 'web') {
3788: $currentstring = $token->[2];
3789: }
3790: return $currentstring;
3791: }
3792:
3793: #-- <noscript> tag (end tag required)
3794: sub start_noscript {
3795: my ($target,$token) = @_;
3796: my $currentstring = '';
3797: if ($target eq 'web') {
3798: $currentstring = $token->[4];
3799: }
3800: return $currentstring;
3801: }
3802:
3803: sub end_noscript {
3804: my ($target,$token) = @_;
3805: my $currentstring = '';
3806: if ($target eq 'web') {
3807: $currentstring = $token->[2];
3808: }
3809: return $currentstring;
3810: }
3811:
3812: #-- <object> tag (end tag required)
3813: sub start_object {
3814: my ($target,$token) = @_;
3815: my $currentstring = '';
3816: if ($target eq 'web') {
3817: $currentstring = $token->[4];
3818: }
3819: return $currentstring;
3820: }
3821:
3822: sub end_object {
3823: my ($target,$token) = @_;
3824: my $currentstring = '';
3825: if ($target eq 'web') {
3826: $currentstring = $token->[2];
3827: }
3828: return $currentstring;
3829: }
3830:
3831: #-- <optgroup> tag (end tag required)
3832: sub start_optgroup {
3833: my ($target,$token) = @_;
3834: my $currentstring = '';
3835: if ($target eq 'web') {
3836: $currentstring = $token->[4];
3837: }
3838: return $currentstring;
3839: }
3840:
3841: sub end_optgroup {
3842: my ($target,$token) = @_;
3843: my $currentstring = '';
3844: if ($target eq 'web') {
3845: $currentstring = $token->[2];
3846: }
3847: return $currentstring;
3848: }
3849:
3850: #-- <samp> tag (end tag required)
3851: sub start_samp {
3852: my ($target,$token) = @_;
3853: my $currentstring = '';
3854: if ($target eq 'web') {
3855: $currentstring = $token->[4];
3856: } elsif ($target eq 'tex') {
3857: $currentstring='\texttt{';
3858: }
3859: return $currentstring;
3860: }
3861:
3862: sub end_samp {
3863: my ($target,$token) = @_;
3864: my $currentstring = '';
3865: if ($target eq 'web') {
3866: $currentstring = $token->[2];
3867: } elsif ($target eq 'tex') {
3868: $currentstring='}';
3869: }
3870: return $currentstring;
3871: }
3872:
3873: #-- <server> tag
3874: sub start_server {
3875: my ($target,$token) = @_;
3876: my $currentstring = '';
3877: if ($target eq 'web') {
3878: $currentstring = $token->[4];
3879: }
3880: return $currentstring;
3881: }
3882:
3883: sub end_server {
3884: my ($target,$token) = @_;
3885: my $currentstring = '';
3886: if ($target eq 'web') {
3887: $currentstring = $token->[2];
3888: }
3889: return $currentstring;
3890: }
3891:
3892: #-- <spacer> tag (end tag forbidden)
3893: sub start_spacer {
3894: my ($target,$token) = @_;
3895: my $currentstring = &end_p(); # Close off any open <p> tag.
3896: if ($target eq 'web') {
3897: $currentstring .= $token->[4];
3898: }
3899: return $currentstring;
3900: }
3901:
3902: sub end_spacer {
3903: my ($target,$token) = @_;
3904: my $currentstring = '';
3905: if ($target eq 'web') {
3906: $currentstring = $token->[2];
3907: }
3908: return $currentstring;
3909: }
3910:
3911: #-- <span> tag (end tag required)
3912: sub start_span {
3913: my ($target,$token) = @_;
3914: my $currentstring = '';
3915: if ($target eq 'web') {
3916: $currentstring = $token->[4];
3917: }
3918: return $currentstring;
3919: }
3920:
3921: sub end_span {
3922: my ($target,$token) = @_;
3923: my $currentstring = '';
3924: if ($target eq 'web') {
3925: $currentstring = $token->[2];
3926: }
3927: return $currentstring;
3928: }
3929:
3930: #-- <tbody> tag (end tag optional)
3931: sub start_tbody {
3932: my ($target,$token) = @_;
3933: my $currentstring = '';
3934: if ($target eq 'web') {
3935: $currentstring = $token->[4];
3936: }
3937: return $currentstring;
3938: }
3939:
3940: sub end_tbody {
3941: my ($target,$token) = @_;
3942: my $currentstring = '';
3943: if ($target eq 'web') {
3944: $currentstring = $token->[2];
3945: }
3946: return $currentstring;
3947: }
3948:
3949: #-- <tfoot> tag (end tag optional)
3950: sub start_tfoot {
3951: my ($target,$token) = @_;
3952: my $currentstring = '';
3953: if ($target eq 'web') {
3954: $currentstring = $token->[4];
3955: }
3956: return $currentstring;
3957: }
3958:
3959: sub end_tfoot {
3960: my ($target,$token) = @_;
3961: my $currentstring = '';
3962: if ($target eq 'web') {
3963: $currentstring = $token->[2];
3964: }
3965: return $currentstring;
3966: }
3967:
3968: #-- <thead> tag (end tag optional)
3969: sub start_thead {
3970: my ($target,$token) = @_;
3971: my $currentstring = '';
3972: if ($target eq 'web') {
3973: $currentstring = $token->[4];
3974: }
3975: return $currentstring;
3976: }
3977:
3978: sub end_thead {
3979: my ($target,$token) = @_;
3980: my $currentstring = '';
3981: if ($target eq 'web') {
3982: $currentstring = $token->[2];
3983: }
3984: return $currentstring;
3985: }
3986:
3987: #-- <var> tag
3988: sub start_var {
3989: my ($target,$token) = @_;
3990: my $currentstring = '';
3991: if ($target eq 'web') {
3992: $currentstring = $token->[4];
3993: } elsif ($target eq 'tex') {
3994: $currentstring = '\textit{';
3995: }
3996: return $currentstring;
3997: }
3998:
3999: sub end_var {
4000: my ($target,$token) = @_;
4001: my $currentstring = '';
4002: if ($target eq 'web') {
4003: $currentstring = $token->[2];
4004: } elsif ($target eq 'tex') {
4005: $currentstring = '}';
4006: }
4007: return $currentstring;
4008: }
4009:
4010: #-- <wbr> tag (end tag forbidden)
4011: sub start_wbr {
4012: my ($target,$token) = @_;
4013: my $currentstring = '';
4014: if ($target eq 'web') {
4015: $currentstring = $token->[4];
4016: }
4017: return $currentstring;
4018: }
4019:
4020: sub end_wbr {
4021: my ($target,$token) = @_;
4022: my $currentstring = '';
4023: if ($target eq 'web') {
4024: $currentstring = $token->[2];
4025: }
4026: return $currentstring;
4027: }
4028:
4029: #-- <hideweboutput> tag
4030: sub start_hideweboutput {
4031: my ($target,$token) = @_;
4032: if ($target eq 'web') {
4033: &Apache::lonxml::startredirection();
4034: }
4035: return '';
4036: }
4037:
4038: sub end_hideweboutput {
4039: my ($target,$token) = @_;
4040: my $currentstring = '';
4041: if ($target eq 'web') {
4042: $currentstring = &Apache::lonxml::endredirection();
4043: }
4044: return '';
4045: }
4046:
4047:
4048: sub image_replication {
4049: my $src = shift;
4050: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4051: #replicates eps or ps
4052: my $epssrc = my $pssrc = $src;
4053: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4054: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4055: if (not -e $epssrc && not -e $pssrc) {
4056: my $result=&Apache::lonnet::repcopy($epssrc);
4057: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4058: }
4059: return '';
4060: }
4061: #
4062: # Get correct sizing parameter for an image given
4063: # it's initial ht. and wid. This allows sizing of
4064: # images that are generated on-the-fly (e.g. gnuplot)
4065: # as well as serving as a utility for image_size.
4066: #
4067: # Parameter:
4068: # height_param
4069: # width_param - Initial picture dimensions.
4070: # scaling - A scale factor.
4071: # parstack, - the current stack of tag attributes
4072: # from the xml parser
4073: # safeeval, - pointer to the safespace
4074: # depth, - from what level in the stack to look for attributes
4075: # (assumes -1 if unspecified)
4076: # cis - look for attrubutes case insensitively
4077: # (assumes false)
4078: #
4079: # Returns:
4080: # height, width - new dimensions.
4081: #
4082: sub resize_image {
4083: my ($height_param, $width_param, $scaling,
4084: $parstack, $safeeval, $depth, $cis) = @_;
4085:
4086: # First apply the scaling...
4087:
4088: $height_param = $height_param * $scaling;
4089: $width_param = $width_param * $scaling;
4090:
4091: #do we have any specified LaTeX size of the picture?
4092: my $toget='TeXwidth';
4093: if ($cis) {
4094: $toget=lc($toget);
4095: }
4096: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4097: $safeeval,$depth,$cis);
4098: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4099: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4100: $safeeval,$depth,$cis);
4101: #do we have any specified web size of the picture?
4102: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4103: $depth,1);
4104: if ($TeXwidth) {
4105: my $old_width_param=$width_param;
4106: if ($TeXwidth=~/(\d+)\s*\%/) {
4107: $width_param = $1*$env{'form.textwidth'}/100;
4108: } else {
4109: $width_param = $TeXwidth;
4110: }
4111: if ($TeXheight) {
4112: $height_param = $TeXheight;
4113: } elsif ($old_width_param) {
4114: $height_param=$TeXwidth/$old_width_param*$height_param;
4115: }
4116: } elsif ($TeXheight) {
4117: $height_param = $TeXheight;
4118: if ($height_param) {
4119: $width_param = $TeXheight/$height_param*$width_param;
4120: }
4121: } elsif ($width) {
4122: my $old_width_param=$width_param;
4123: $width_param = $width*$scaling;
4124: if ($old_width_param) {
4125: $height_param=$width_param/$old_width_param*$height_param;
4126: }
4127: }
4128: if ($width_param > $env{'form.textwidth'}) {
4129: my $old_width_param=$width_param;
4130: $width_param =0.95*$env{'form.textwidth'};
4131: if ($old_width_param) {
4132: $height_param=$width_param/$old_width_param*$height_param;
4133: }
4134: }
4135:
4136: return ($height_param, $width_param);
4137: }
4138:
4139: sub image_size {
4140: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4141:
4142: #size of image from gif/jpg/jpeg/png
4143: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4144: if (-e $ressrc) {
4145: $src = $ressrc;
4146: }
4147: my $image = Image::Magick->new;
4148: my $current_figure = $image->Read($src);
4149: my $width_param = $image->Get('width');
4150: my $height_param = $image->Get('height');
4151: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4152: undef($image);
4153:
4154: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4155: $scaling, $parstack, $safeeval,
4156: $depth, $cis);
4157:
4158: return ($height_param, $width_param);
4159: }
4160:
4161: sub image_width {
4162: my ($height, $width) = &image_size(@_);
4163: return $width;
4164: }
4165: # Not yet 100% sure this is correct in all circumstances..
4166: # due to my uncertainty about mods to image_size.
4167: #
4168: sub image_height {
4169: my ($height, $width) = &image_size(@_);
4170: return $height;
4171: }
4172:
4173: sub get_eps_image {
4174: my ($src)=@_;
4175: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4176:
4177: # In order to prevent the substitution of the alt text, we need to
4178: # be sure the orig_src file is on system now so:
4179:
4180: if (! -e $orig_src) {
4181: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4182: }
4183: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4184: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4185: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4186: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4187: &Apache::lonxml::debug("Filelocation gives: $src");
4188: if (! -e $src) {
4189: &Apache::lonxml::debug("$src does not exist");
4190: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4191: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4192: #if replication failed try to find ps file
4193: $src=~s/\.eps$/\.ps/;
4194: &Apache::lonxml::debug("Now looking for $src");
4195: #if no ps file try to replicate it.
4196: my $didrepcopy = &Apache::lonnet::repcopy($src);
4197: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4198: if ( (not -e $src) ||
4199: ($didrepcopy ne 'ok')) {
4200: &Apache::lonxml::debug("Failed to find or replicate $src");
4201:
4202: #if replication failed try to produce eps file dynamically
4203: $src=~s/\.ps$/\.eps/;
4204: my $temp_file;
4205: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4206: my $newsrc=$orig_src;
4207: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4208: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4209: print FILE "$newsrc\n";
4210: close FILE;
4211: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4212: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4213: if ($sext ne "") { # Put the ext. back in to uniquify.
4214: $src =~ s/\.eps$/$sext.eps/;
4215: }
4216: }
4217: }
4218: }
4219: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4220: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4221: return ($path.'/',$file);
4222: }
4223:
4224: sub eps_generation {
4225: my ($src,$file,$width_param) = @_;
4226: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4227: my $temp_file = Apache::File->new('>>'.$filename);
4228: print $temp_file "$src\n";
4229: my $newsrc = $src;
4230: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4231: $newsrc=~s/\/home\/httpd\/html\/res//;
4232: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4233: $newsrc=~s/\/\.\//\//;
4234: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4235: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4236: $newsrc=~s/\/home\/httpd\/lonUsers//;
4237: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4238: }
4239: if ($newsrc=~/\/userfiles\//) {
4240: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4241: } else {
4242: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4243: }
4244: }
4245:
4246: sub file_path {
4247: my $src=shift;
4248: my ($file,$path);
4249: if ($src =~ m!(.*)/([^/]*)$!) {
4250: $file = $2;
4251: $path = $1.'/';
4252: }
4253: return $file,$path;
4254: }
4255: # Converts a measurement in to mm from any of
4256: # the other valid LaTeX units of measure.
4257: # If the units of measure are missing from the
4258: # parameter, it is assumed to be in and returned
4259: # with mm units of measure
4260: sub recalc {
4261: my $argument = shift;
4262: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4263: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4264: my $value=$1;
4265: my $units=$2;
4266: if ($units eq 'cm') {
4267: $value*=10;
4268: } elsif ($units eq 'in') {
4269: $value*=25.4;
4270: } elsif ($units eq 'pc') {
4271: $value*=(25.4*12/72.27);
4272: } elsif ($units eq 'pt') {
4273: $value*=(25.4/72.27);
4274: }
4275: return $value.' mm';
4276: }
4277:
4278: sub LATEX_length {
4279: my $garbage=shift;
4280: $garbage=~s/^\s+$//;
4281: $garbage=~s/^\s+(\S.*)/$1/;#space before
4282: $garbage=~s/(.*\S)\s+$/$1/;#space after
4283: $garbage=~s/(\s)+/$1/;#only one space
4284: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4285: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4286: $garbage=~s/([^\\])\$/$1/g;#$
4287: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4288: $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;
4289: $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;
4290: $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;
4291: $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;
4292: $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;
4293: $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;
4294: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4295: #remove some other LaTeX command
4296: $garbage=~s|\\(\w+)\\|\\|g;
4297: $garbage=~s|\\(\w+)(\s*)|$2|g;
4298: $garbage=~s|\+|11|g;
4299: my $value=length($garbage);
4300: return $value;
4301: }
4302:
4303:
4304: # is_inside_of $tagstack $tag
4305: # This sub returns true if the current state of Xml processing
4306: # is inside of the tag.
4307: # Parameters:
4308: # tagstack - The tagstack from the parser.
4309: # tag - The tag (without the <>'s.).
4310: # Sample usage:
4311: # if (is_inside_of($tagstack "table")) {
4312: # # I'm in a table....
4313: # }
4314: sub is_inside_of {
4315: my ($tagstack, $tag) = @_;
4316: my @stack = @$tagstack;
4317: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4318: if ($stack[$i] eq $tag) {
4319: return 1;
4320: }
4321: }
4322: return 0;
4323: }
4324:
4325:
4326: 1;
4327: __END__
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