1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.302.2.4 2006/03/29 22:54:10 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: #}
74: sub initialize_londefdef {
75: $Apache::londefdef::TD_redirection=0;
76: @Apache::londefdef::table = ();
77: $Apache::londefdef::select=0;
78: undef(@Apache::londefdef::description);
79: @Apache::londefdef::DD=(0);
80: @Apache::londefdef::DT=(0);
81: @Apache::londefdef::seenDT=(0);
82: $Apache::londefdef::list_index=0;
83: }
84:
85: #======================= TAG SUBROUTINES =====================
86: #-- <output>
87: sub start_output {
88: my ($target) = @_;
89: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
90: return '';
91: }
92: sub end_output {
93: my ($target) = @_;
94: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
95: return '';
96: }
97: #-- <m> tag
98: sub start_m {
99: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
100: my $currentstring = '';
101: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
102: if ($target eq 'web' || $target eq 'analyze') {
103: &Apache::lonxml::debug("M is starting with:$inside:");
104: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
105: if ($eval eq 'on') {
106: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
107: #&Apache::lonxml::debug("M is evaulated to:$inside:");
108: }
109: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
110: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
111: if ($Apache::lontexconvert::errorstring) {
112: &Apache::lonxml::warning("tth error: ".
113: $Apache::lontexconvert::errorstring);
114: $Apache::lontexconvert::errorstring='';
115: }
116: #&Apache::lonxml::debug("M is ends with:$currentstring:");
117: $Apache::lonxml::post_evaluate=0;
118: } elsif ($target eq 'tex') {
119: $currentstring = $inside;
120: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
121: if ($eval eq 'on') {
122: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
123: }
124: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
125: # detect simple math mode entry exits, and convert them
126: # to use \ensuremath
127: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
128: $currentstring=~s/^(\s*)\$/$1/;
129: $currentstring=~s/\$(\s*)$/$1/;
130: $currentstring='\ensuremath{'.$currentstring.'}';
131: }
132: $Apache::lonxml::post_evaluate=0;
133: }
134: return $currentstring;
135: }
136:
137: sub end_m {
138: my ($target,$token) = @_;
139: my $currentstring = '';
140: if ($target eq 'tex') {
141: $currentstring = "";
142: }
143: return $currentstring;
144: }
145:
146: sub start_tthoption {
147: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
148: my $result;
149: if ($target eq 'web' || $target eq 'webgrade') {
150: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
151: $style);
152: $inside=~s/^\s*//;
153: if ($env{'browser.mathml'}) {
154: &tth::ttmoptions($inside);
155: } else {
156: &tth::tthoptions($inside);
157: }
158: }
159: return $result;
160: }
161:
162: sub end_tthoption {
163: my ($target,$token) = @_;
164: my $result;
165: return $result;
166: }
167:
168: #-- <html> tag (end tag optional)
169: sub start_html {
170: my ($target,$token) = @_;
171: my $currentstring = '';
172: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
173: &Apache::lontexconvert::init_tth();
174: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
175: $currentstring = &Apache::lonxml::xmlbegin();
176: } elsif ($target eq 'tex') {
177: $currentstring .= '\documentclass[letterpaper]{article}';
178: if (($env{'form.latex_type'}=~'batchmode') ||
179: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
180: $currentstring .= '\newcommand{\keephidden}[1]{}'.
181: '\renewcommand{\deg}{$^{\circ}$}'.
182: '\usepackage{longtable}'.
183: '\usepackage{textcomp}'.
184: '\usepackage{makeidx}'.
185: '\usepackage[dvips]{graphicx}'.
186: '\usepackage{wrapfig}'.
187: '\usepackage{picins}'.
188: '\usepackage{epsfig}'.
189: '\usepackage{calc}'.
190: '\usepackage{amsmath}'.
191: '\usepackage{amssymb}'.
192: '\usepackage{amsfonts}'.
193: '\usepackage{amsthm}'.
194: '\usepackage{amscd}'.
195: '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'.
196: '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}';
197: }
198: return $currentstring;
199: }
200:
201: sub end_html {
202: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
203: my $currentstring = '';
204: if ($target eq 'web') {
205: $currentstring = '</html>';
206: }
207: return $currentstring;
208: }
209:
210: #-- <head> tag (end tag optional)
211: sub start_head {
212: my ($target,$token) = @_;
213: my $currentstring = '';
214: if ($target eq 'web') {
215: $currentstring = $token->[4].&Apache::lonxml::fontsettings();
216: }
217: return $currentstring;
218: }
219:
220: sub end_head {
221: my ($target,$token) = @_;
222: my $currentstring = '';
223: if ($target eq 'web' && $env{'request.state'} eq 'published') {
224: $currentstring = &Apache::lonmenu::registerurl(undef,$target).
225: $token->[2];
226: }
227: return $currentstring;
228: }
229:
230: #-- <map> tag (end tag required)
231: sub start_map {
232: my ($target,$token) = @_;
233: my $currentstring = '';
234: if ($target eq 'web' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
391: my $args='';
392: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
393: if ($args eq '') {
394: &Apache::lonxml::get_all_text("/meta",$parser,$style);
395: } else {
396: $currentstring = $token->[4];
397: }
398: } elsif ($target eq 'meta') {
399: unless (&Apache::lonxml::get_param
400: ('http-equiv',$parstack,$safeeval,undef,1)) {
401: my $name=$token->[2]->{'name'};
402: $name=~tr/A-Z/a-z/;
403: $name=~s/\s/\_/gs;
404: $name=~s/\W//gs;
405: if ($name) {
406: $currentstring='<'.$name;
407: my $display=&Apache::lonxml::get_param
408: ('display',$parstack,$safeeval,undef,1);
409: if ($display) {
410: $display=~s/\"/\'/g;
411: $currentstring.=' display="'.$display.'"';
412: }
413: $currentstring.='>'.
414: &Apache::lonxml::get_param
415: ('content',$parstack,$safeeval,undef,1).
416: '</'.$name.'>';
417: }
418: my $display=&Apache::lonxml::get_param
419: ('display',$parstack,$safeeval,undef,1);
420: if ($display) {
421: $display=&HTML::Entities::encode($display,'<>&"');
422: $currentstring.='<'.$name.'.display>'.$display.
423: '</'.$name.'.display>';
424: }
425: }
426: } elsif ($target eq 'tex') {
427: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
428: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
429: if ((not defined $content) && (not defined $name)) {
430: &Apache::lonxml::startredirection();
431: }
432: }
433: return $currentstring;
434: }
435:
436: sub end_meta {
437: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
438: my $currentstring = '';
439: if ($target eq 'web' || $target eq 'webgrade') {
440: my $args='';
441: if ( $#$parstack > -1 ) { $args=$$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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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: # in the width case we ignore absolute width
1965: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1966: if (!defined($TeXwidth)) {
1967: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1968: $safeeval,undef,1);
1969: if ($htmlwidth =~ /%/) {
1970: $TeXwidth = $htmlwidth;
1971: } else {
1972: $TeXwidth = $textwidth;
1973: }
1974: } else {
1975: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1976: }
1977: if ($TeXwidth=~/%/) {
1978: $Apache::londefdef::table[-1]{'percent'}=1;
1979: $TeXwidth=~/(\d+)/;
1980: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1981: } else {
1982: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1983: }
1984:
1985: #table's border
1986: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1987: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1988: unless (defined $border) { $border = 0; }
1989: if ($border) {
1990: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1991: $Apache::londefdef::table[-1]{'vinc'} = '&';
1992: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1993: } else {
1994: $Apache::londefdef::table[-1]{'hinc'} = '';
1995: $Apache::londefdef::table[-1]{'vinc'} = '&';
1996: $Apache::londefdef::table[-1]{'vvinc'} = '';
1997: }
1998: if ($#Apache::londefdef::table==0) {
1999: # Note that \newline seems to destroy the alignment envs.
2000: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2001: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2002: }
2003: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2004: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2005: $Apache::londefdef::table[-1]{'objectlen'}=[];
2006: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2007: $Apache::londefdef::table[-1]{'maxlen'}=[];
2008: $Apache::londefdef::table[-1]{'minlen'}=[];
2009: $Apache::londefdef::table[-1]{'content'}=[];
2010: $Apache::londefdef::table[-1]{'align'}=[];
2011: $currentstring.='\keephidden{NEW TABLE ENTRY}';
2012:
2013:
2014: }
2015: return $currentstring;
2016: }
2017:
2018: sub end_table {
2019: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2020: my $currentstring = '';
2021: if ($target eq 'web' || $target eq 'webgrade') {
2022: $currentstring = $token->[2];
2023: } elsif ($target eq 'tex') {
2024: my $inmemory = '';
2025: my $output = '';
2026: my $WARNING='';
2027: #width of columns from TeXwidth attributes
2028:
2029: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2030: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2031: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2032: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2033: }
2034: }
2035: }
2036: #free space and number of empty columns
2037: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2038: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2039: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2040: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2041: $empty_columns++;
2042: } else {
2043: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2044: }
2045: }
2046: #boundaries for contents columns
2047: my @min_len=();#columns can not be narrower
2048: my @max_len=();#maximum length of column
2049: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2050: my ($localmin,$localmax)=(0,0);
2051: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2052: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2053: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2054: }
2055: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2056: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2057: }
2058: }
2059: push @min_len, $localmin;
2060: push @max_len, $localmax;
2061: }
2062: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2063: my $localmin=0,;
2064: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2065: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2066: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2067: }
2068: }
2069: if ($max_len[$jn]<$localmin) {
2070: $max_len[$jn]=$localmin;
2071: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2072: }#object size is bigger
2073: if ($min_len[$jn]<$localmin) {
2074: $min_len[$jn]=$localmin;
2075: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2076: }#object size is bigger
2077: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2078: $min_len[$jn]=0;
2079: $max_len[$jn]=0;
2080: }
2081: }
2082: #final adjustment of column width
2083: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2084: my @adjust=();
2085: #step 1. adjustment by maximum value
2086: my $space_neeeded=0;
2087: for (my $jn=0;$jn<=$#max_len;$jn++) {
2088: $space_neeeded=$space_neeeded+$max_len[$jn];
2089: }
2090: if ($space_neeeded<=$available_space) {
2091: for (my $jn=0;$jn<=$#max_len;$jn++) {
2092: if ($fwidth[$jn]==0) {
2093: $fwidth[$jn]=$max_len[$jn];
2094: }
2095: }
2096: } else {
2097: #step 2. adjustment by minimum value (estimation)
2098: $space_neeeded=0;
2099: for (my $jn=0;$jn<=$#min_len;$jn++) {
2100: $space_neeeded+=$min_len[$jn];
2101: }
2102: if ($space_neeeded>$available_space) {
2103: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2104: for (my $jn=0;$jn<=$#max_len;$jn++) {
2105: if ($fwidth[$jn]==0) {
2106: $fwidth[$jn]=$min_len[$jn];
2107: }
2108: }
2109: #check if we have objects which can be scaled
2110: my $how_many_to_scale=0;
2111: my @to_scale=();
2112: for (my $jn=0;$jn<=$#max_len;$jn++) {
2113: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2114: $how_many_to_scale++;
2115: push @to_scale, $jn;
2116: }
2117: }
2118: if ($how_many_to_scale>0) {
2119: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2120: foreach my $jn (@to_scale) {
2121: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2122: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2123: if ($1 ne '') {
2124: my $current_length=&recalc($1);
2125: $current_length=~/(\d+\.?\d*)/;
2126: $current_length=$current_length-$space_to_adjust;
2127: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2128: }
2129: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2130: if ($1 ne '') {
2131: my $current_length=$1;
2132: $current_length=$current_length-$space_to_adjust;
2133: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2134: }
2135: }
2136: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2137: }
2138: }
2139: } else {
2140: #step 3. adjustment over minimal + corrections
2141: my $enlarge_coef=$available_space/$space_neeeded;
2142: my $acsessive=0;
2143: for (my $jn=0;$jn<=$#min_len;$jn++) {
2144: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2145: if ($adjust[$jn]>$max_len[$jn]) {
2146: $fwidth[$jn]=$max_len[$jn];
2147: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2148: $adjust[$jn]=0;
2149: }
2150: }
2151: if ($acsessive>0) {
2152: #we have an excess of space and can redistribute it
2153: my $notempty_columns=0;
2154: for (my $jn=0;$jn<=$#min_len;$jn++) {
2155: if ($adjust[$jn]!=0) {
2156: $notempty_columns++;
2157: }
2158: }
2159: my $per_column=$acsessive/$notempty_columns;
2160: for (my $jn=0;$jn<=$#min_len;$jn++) {
2161: if ($adjust[$jn]!=0) {
2162: $adjust[$jn]+=$per_column;
2163: $fwidth[$jn]=$adjust[$jn];
2164: }
2165: }
2166: } else {
2167: for (my $jn=0;$jn<=$#min_len;$jn++) {
2168: $fwidth[$jn]=$adjust[$jn];
2169: }
2170: }
2171: }
2172: }
2173: #use all available width if it is defined in % or as TeXwidth
2174: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2175: my $current=0;
2176: for (my $i=0;$i<=$#fwidth;$i++) {
2177: $current+=$fwidth[$i];
2178: }
2179: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2180: for (my $i=0;$i<=$#fwidth;$i++) {
2181: $fwidth[$i]*=$coef;
2182: }
2183: }
2184: #removing of empty columns if allowed
2185: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2186: if ($permission eq 'yes') {
2187: my @cleaned_table=();
2188: my @cleaned_header=();
2189: my $colind=0;
2190: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2191: if ($fwidth[$jn]!=0) {
2192: #we need to copy column
2193: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2194: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2195: $cleaned_header[$colind]=$fwidth[$jn];
2196: }
2197: $colind++;
2198: }
2199: }
2200: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2201: @fwidth=@cleaned_header;
2202: }
2203: #construct header of the table
2204: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2205: for (my $in=0;$in<=$#fwidth;$in++) {
2206: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2207: }
2208: $header_of_table .= '}';
2209: #fill the table
2210: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2211: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2212: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2213: $output.=¢er_correction().'\begin{center}';
2214: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2215: $output.=' \hfill \llap{'
2216: }
2217: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2218: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2219: $output.='\end{center}';#.¢er_correction();
2220: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2221: $output.='} ';
2222: }
2223: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2224: }
2225: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2226: }
2227: # Note that \newline destroys alignment env's produced by e.g. <div>
2228: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2229: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2230: if ($#Apache::londefdef::table > 0) {
2231: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2232: # Figure out max/and min width by summing us and then
2233: # apply that to the current column of the table we nest in
2234: # if it's larger than the current width or the current width
2235: # is undefined.
2236: #
2237: my $min_nested_width = 0;
2238: my $max_nested_width = 0;
2239: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2240: $min_nested_width += $min_len[$col];
2241: $max_nested_width += $max_len[$col];
2242:
2243: }
2244: # Fudge in an extra 5 mm for borders etc:
2245:
2246: $min_nested_width += 5;
2247: $max_nested_width += 5;
2248:
2249: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2250: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2251: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2252: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2253: }
2254: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2255: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2256: }
2257:
2258: pop @Apache::londefdef::table;
2259: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2260: } else {
2261: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2262: pop @Apache::londefdef::table;
2263: undef @Apache::londefdef::table;
2264: }
2265: }
2266: return $currentstring;
2267: }
2268:
2269: #-- <tr> tag (end tag optional)
2270: sub start_tr {
2271: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2272: my $currentstring = '';
2273: if ($target eq 'web' || $target eq 'webgrade') {
2274: $currentstring = $token->[4];
2275: } elsif ($target eq 'tex') {
2276: $Apache::londefdef::table[-1]{'row_number'}++;
2277: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2278: if ($alignchar ne '') {
2279: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2280: } else {
2281: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2282: }
2283: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2284: #
2285: # Need to save the number of table columns to preserve the max # columns.
2286: #
2287: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2288: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2289: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2290: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2291: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2292: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2293: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2294: }
2295: return $currentstring;
2296: }
2297:
2298: sub end_tr {
2299: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2300: my $currentstring = &end_p(); # Close any pending <p> in the row.
2301: if ($target eq 'web' || $target eq 'webgrade') {
2302: $currentstring .= $token->[2];
2303: } elsif ($target eq 'tex') {
2304: if ($Apache::londefdef::TD_redirection) {
2305: &end_td_tex($parstack,$parser,$safeeval);
2306: }
2307: # Counter columns must be the maximum number of columns seen
2308: # in the table so far so:
2309: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2310: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2311: }
2312:
2313:
2314:
2315: }
2316: return $currentstring;
2317: }
2318:
2319: #-- <td> tag (end tag optional)
2320: sub start_td {
2321: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2322: my $currentstring = '';
2323: if ($target eq 'web' || $target eq 'webgrade') {
2324: $currentstring = $token->[4];
2325: } elsif ($target eq 'tex') {
2326: $Apache::londefdef::TD_redirection = 1;
2327: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2328: }
2329: return $currentstring;
2330: }
2331:
2332: sub tag_check {
2333: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2334: my @ar=@$parstack;
2335: for (my $i=$#ar-1;$i>=0;$i--) {
2336: if (lc($$tagstack[$i]) eq $good_tag) {
2337: &start_td_tex($parstack,$parser,$safeeval);
2338: last;
2339: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2340: splice @ar, $i+1;
2341: &end_td_tex(\@ar,$parser,$safeeval);
2342: &start_td_tex($parstack,$parser,$safeeval);
2343: last;
2344: }
2345: }
2346: return '';
2347: }
2348:
2349: sub start_td_tex {
2350: my ($parstack,$parser,$safeeval) = @_;
2351: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2352: if ($alignchar eq '') {
2353: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2354: }
2355: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2356: $Apache::londefdef::table[-1]{'counter_columns'}++;
2357: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2358: if (defined $TeXwidth) {
2359: my $current_length=&recalc($TeXwidth);
2360: $current_length=~/(\d+\.?\d*)/;
2361: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2362: }
2363: &Apache::lonxml::startredirection();
2364: return '';
2365: }
2366:
2367: sub end_td_tex {
2368: my ($parstack,$parser,$safeeval) = @_;
2369: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2370: my $data=&Apache::lonxml::endredirection();
2371: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2372: if (defined $TeXwidth) {
2373: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2374: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2375: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2376: } else {
2377: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2378: my $garbage_data=$data;
2379: my $fwidth=0;
2380: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2381: my $current_length=&recalc($1);
2382: $current_length=~/(\d+\.?\d*)/;
2383: if ($fwidth<$1) {$fwidth=$1;}
2384: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2385: }
2386: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2387: my $current_length=$1;
2388: if ($fwidth<$current_length) {$fwidth=$current_length;}
2389: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2390: }
2391: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2392: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2393: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2394: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2395: } elsif ($data=~/\\parbox\{\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*\s*\}/ or $data=~/\\epsfxsize\s*=\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*/) {
2396: my $garbage_data=$data;
2397: my $fwidth=0;
2398: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2399: my $current_length=&recalc($1);
2400: $current_length=~/(\d+\.?\d*)/;
2401: if ($fwidth<$1) {$fwidth=$1;}
2402: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2403: }
2404: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2405: my $current_length=&recalc($1);
2406: $current_length=~/(\d+\.?\d*)/;
2407: if ($fwidth<$1) {$fwidth=$1;}
2408: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2409: }
2410: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2411: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2412: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2413: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2414: $data=~s/\\\\\s*$//;
2415: } else {
2416: $data=~s/^\s+(\S.*)/$1/;
2417: $data=~s/(.*\S)\s+$/$1/;
2418: $data=~s/(\s)+/$1/;
2419: my ($current_length,$min_length)=(0,0);
2420: if ($data=~/\\vskip/) {
2421: my $newdata=$data;
2422: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2423: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2424: foreach my $elementdata (@newdata) {
2425: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2426: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2427: my @words=split(/ /,$elementdata);
2428: foreach my $word (@words) {
2429: my $lengthword=2.5*&LATEX_length($word);
2430: if ($min_length<$lengthword) {$min_length=$lengthword;}
2431: }
2432: }
2433: } else {
2434: $current_length=2.5*&LATEX_length($data);
2435: my @words=split(/ /,$data);
2436: foreach my $word (@words) {
2437: my $lengthword=2*&LATEX_length($word);
2438: if ($min_length<$lengthword) {$min_length=$lengthword;}
2439: }
2440: }
2441: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2442: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2443: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2444: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2445: }
2446: }
2447: # Substitute all of the tables nested in this cell in their appropriate places.
2448:
2449:
2450: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2451: for (my $in=0; $in<=$nested_count; $in++) {
2452: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2453: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2454: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2455: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2456:
2457: }
2458: # Should be be killing off the 'include' elements as they're used up?
2459: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2460: return '';
2461: }
2462:
2463: sub end_td {
2464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2465: my $currentstring = '';
2466: if ($target eq 'web' || $target eq 'webgrade') {
2467: $currentstring = $token->[2];
2468: } elsif ($target eq 'tex') {
2469: $Apache::londefdef::TD_redirection =0;
2470: &end_td_tex($parstack,$parser,$safeeval);
2471: }
2472: return $currentstring;
2473: }
2474:
2475: #-- <th> tag (end tag optional)
2476: sub start_th {
2477: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2478: my $currentstring = '';
2479: if ($target eq 'web' || $target eq 'webgrade') {
2480: $currentstring = $token->[4];
2481: } elsif ($target eq 'tex') {
2482: $Apache::londefdef::TD_redirection = 1;
2483: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2484: }
2485: return $currentstring;
2486: }
2487:
2488: sub tagg_check {
2489: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2490: my @ar=@$parstack;
2491: for (my $i=$#ar-1;$i>=0;$i--) {
2492: if (lc($$tagstack[$i]) eq $good_tag) {
2493: &start_th_tex($parstack,$parser,$safeeval);
2494: last;
2495: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2496: splice @ar, $i+1;
2497: &end_th_tex(\@ar,$parser,$safeeval);
2498: &start_th_tex($parstack,$parser,$safeeval);
2499: last;
2500: }
2501: }
2502: return '';
2503: }
2504:
2505: sub start_th_tex {
2506: my ($parstack,$parser,$safeeval) = @_;
2507: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2508: if ($alignchar eq '') {
2509: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2510: }
2511: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2512: $Apache::londefdef::table[-1]{'counter_columns'}++;
2513: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2514: if (defined $TeXwidth) {
2515: my $current_length=&recalc($TeXwidth);
2516: $current_length=~/(\d+\.?\d*)/;
2517: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2518: }
2519: &Apache::lonxml::startredirection();
2520: return '';
2521: }
2522:
2523: sub end_th_tex {
2524: my ($parstack,$parser,$safeeval) = @_;
2525: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2526: my $data=&Apache::lonxml::endredirection();
2527: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2528: if (defined $TeXwidth) {
2529: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2530: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2531: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2532: } else {
2533: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2534: my $garbage_data=$data;
2535: my $fwidth=0;
2536: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2537: my $current_length=&recalc($1);
2538: $current_length=~/(\d+\.?\d*)/;
2539: if ($fwidth<$1) {$fwidth=$1;}
2540: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2541: }
2542: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2543: my $current_length=$1;
2544: if ($fwidth<$current_length) {$fwidth=$current_length;}
2545: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2546: }
2547: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2548: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2549: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2550: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2551: } else {
2552: $data=~s/^\s+(\S.*)/$1/;
2553: $data=~s/(.*\S)\s+$/$1/;
2554: $data=~s/(\s)+/$1/;
2555: my ($current_length,$min_length)=(0,0);
2556: if ($data=~/\\vskip/) {
2557: my $newdata=$data;
2558: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2559: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2560: foreach my $elementdata (@newdata) {
2561: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2562: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2563: my @words=split(/ /,$elementdata);
2564: foreach my $word (@words) {
2565: my $lengthword=2.5*&LATEX_length($word);
2566: if ($min_length<$lengthword) {$min_length=$lengthword;}
2567: }
2568: }
2569: } else {
2570: $current_length=2.5*&LATEX_length($data);
2571: my @words=split(/ /,$data);
2572: foreach my $word (@words) {
2573: my $lengthword=2*&LATEX_length($word);
2574: if ($min_length<$lengthword) {$min_length=$lengthword;}
2575: }
2576: }
2577: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2578: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2579: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2580: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2581: }
2582: }
2583: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2584: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2585: }
2586: #make data bold
2587: $data='\textbf{'.$data.'}';
2588: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2589: return'';
2590: }
2591:
2592: sub end_th {
2593: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2594: my $currentstring = &end_p(); # Close any open <p> in the row.
2595: if ($target eq 'web' || $target eq 'webgrade') {
2596: $currentstring .= $token->[2];
2597: } elsif ($target eq 'tex') {
2598: $Apache::londefdef::TD_redirection =0;
2599: &end_th_tex($parstack,$parser,$safeeval);
2600: }
2601: return $currentstring;
2602: }
2603:
2604: #-- <img> tag (end tag forbidden)
2605: #
2606: # Render the <IMG> tag.
2607: # <IMG> has the following attributes (in addition to the
2608: # standard HTML ones:
2609: # TeXwrap - Governs how the tex target will try to wrap text around
2610: # horizontally aligned images.
2611: # TeXwidth - The width of the image when rendered for print (mm).
2612: # TeXheight - The height of the image when rendered for print (mm)
2613: # (Note there seems to also be support for this as a % of page size)
2614: #
2615: sub start_img {
2616: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2617: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2618: undef,1);
2619: if (! $src &&
2620: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2621: ) {
2622: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2623: return '';
2624: }
2625: &Apache::lonxml::extlink($src);
2626: my $currentstring = '';
2627: my $scaling = .3;
2628:
2629: # Render unto browsers that which are the browser's...
2630:
2631: if ($target eq 'web' || $target eq 'webgrade') {
2632: if ($env{'browser.imagesuppress'} ne 'on') {
2633: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2634: } else {
2635: my $alttag= &Apache::lonxml::get_param
2636: ('alt',$parstack,$safeeval,undef,1);
2637: unless ($alttag) {
2638: $alttag=&Apache::lonmeta::alttag
2639: ($Apache::lonxml::pwd[-1],$src);
2640: }
2641: $currentstring.='[IMAGE: '.$alttag.']';
2642: }
2643:
2644: # and render unto TeX that which is LaTeX
2645:
2646: } elsif ($target eq 'tex') {
2647: #
2648: # The alignment will require some superstructure to be put around
2649: # the \includegraphics stuff. At present we can only partially
2650: # simulate the alignments offered by html.
2651: #
2652: #
2653: my $align = lc(&Apache::lonxml::get_param('align',
2654: $parstack,
2655: $safeeval,
2656: undef,1));
2657: if(!$align) {
2658: # disabled for now see BUG#4535
2659: if (&is_inside_of($tagstack, "table")) {
2660: $align = "top"; # Force top of image to top of table cell
2661: } else {
2662: $align = "bottom"; # This is html's default so it's ours too.
2663: }
2664: }
2665: #
2666: &Apache::lonxml::debug("Alignemnt = $align");
2667: # LaTeX's image/text wrapping is really bad since it wants to
2668: # make figures float.
2669: # The user has the optional parameter (applicable only to l/r
2670: # alignment to use the picins/parpic directive to get wrapped text
2671: # this is also imperfect.. that's why we give them a choice...
2672: # so they can't yell at us for our choice.
2673: #
2674: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2675: $parstack,
2676: $safeeval,
2677: undef,0);
2678: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2679: if(!$latex_rendering) {
2680: $latex_rendering = "texwrap";
2681: }
2682: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2683:
2684: #if original gif/jpg/png file exist do following:
2685: my $origsrc=$src;
2686: my ($path,$file) = &get_eps_image($src);
2687: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2688: &Apache::lonxml::debug("path = $path file = $file src = $src");
2689: if (-e $src) {
2690: &Apache::lonxml::debug("$src exists");
2691: my ($height_param,$width_param)=
2692: &image_size($origsrc,0.3,$parstack,$safeeval);
2693: my $destpath = $path;
2694: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2695: my $destfile = $file;
2696: $destfile =~ s/ /\_/g;
2697: my $size;
2698: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2699: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2700: $size='['.$size;
2701: $size=~s/,$/]/;
2702: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2703: .'\includegraphics'.$size.'{'.$destfile.'} ';
2704:
2705: # If there's an alignment specification we need to honor it here.
2706: # For the horizontal alignments, we will also honor the
2707: # value of the latex specfication. The default is parbox,
2708: # and that's used for illegal values too.
2709: #
2710: # Even though we set a default alignment value, the user
2711: # could have given us an illegal value. In that case we
2712: # just use the default alignment of bottom..
2713: if ($align eq "top") {
2714: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2715: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2716: my $offset = $height_param/2;
2717: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2718: } elsif ($align eq "left") {
2719: if ($latex_rendering eq "parpic") {
2720: $currentstring = '\parpic[l]{'.$currentstring.'}';
2721: } else { # wrapfig render
2722: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2723: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2724: }
2725: } elsif ($align eq "right") {
2726: if ($latex_rendering eq "parpic") {
2727: $currentstring = '\parpic[r]{'.$currentstring.'}';
2728: } else { # wrapfig rendering
2729: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2730: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2731:
2732: }
2733: } else { # Bottom is also default.
2734: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2735: }
2736: } else {
2737: &Apache::lonxml::debug("$src does not exist");
2738: #original image file doesn't exist so check the alt attribute
2739: my $alt =
2740: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2741: unless ($alt) {
2742: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2743: }
2744:
2745: if ($alt) { $currentstring .= ' '.$alt.' '; }
2746: }
2747:
2748: # And here's where the semi-quote breaks down: allow the user
2749: # to edit the beast as well by rendering the problem for edit:
2750: } elsif ($target eq 'edit') {
2751: $currentstring .=&Apache::edit::tag_start($target,$token);
2752: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2753: &Apache::edit::browse('src',undef,'alt').' '.
2754: &Apache::edit::search('src',undef,'alt').'<br />';
2755: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2756: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2757: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2758: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2759: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2760: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2761: ['','bottom','middle','top','left','right'],$token,5);
2762: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2763: ['', 'parbox', 'parpic'], $token, 2);
2764: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2765: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2766: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2767: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2768: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2769:
2770:
2771: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2772: if ($width) { $currentstring.=' width="'.$width.'" '; }
2773: if ($height) { $currentstring.=' height="'.$height.'" '; }
2774: $currentstring .= ' />';
2775: } elsif ($target eq 'modified') {
2776: my ($osrc,$owidth,$oheight)=
2777: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2778: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2779: $safeeval,'src','alt','align',
2780: 'TeXwidth','TeXheight', 'TeXwrap',
2781: 'width','height');
2782: my ($nsrc,$nwidth,$nheight)=
2783: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2784: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2785: &image_replication($loc);
2786: my ($iwidth,$iheight);
2787: if (-e $loc) {
2788: my $image = Image::Magick->new;
2789: $image->Read($loc);
2790: ($iwidth, $iheight) = ($image->Get('width'),
2791: $image->Get('height'));
2792: }
2793: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2794: # changed image or no size specified,
2795: # if they didn't explicitly change the
2796: # width or height use the ones from the image
2797: if ($iwidth && $iheight) {
2798: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2799: $token->[2]{'width'} = $iwidth;$ctag=1;
2800: }
2801: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2802: $token->[2]{'height'}=$iheight;$ctag=1;
2803: }
2804: }
2805: }
2806: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2807: # if we don't have a width or height
2808: if ($iwidth && $cwidth && !$cheight) {
2809: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2810: }
2811: if ($iheight && $cheight && !$cwidth) {
2812: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2813: }
2814: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2815: }
2816:
2817: return $currentstring;
2818: }
2819:
2820: sub end_img {
2821: my ($target,$token) = @_;
2822: my $currentstring = '';
2823: if ($target eq 'web' || $target eq 'webgrade') {
2824: $currentstring = $token->[2];
2825: } elsif ($target eq 'tex') {
2826: $currentstring = '';
2827: }
2828: return $currentstring;
2829: }
2830:
2831: #-- <applet> tag (end tag required)
2832: sub start_applet {
2833: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2834:
2835: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2836: &Apache::lonxml::extlink($code);
2837: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2838: undef,1);
2839: &Apache::lonxml::extlink($archive);
2840: my $currentstring = '';
2841: if ($target eq 'web' || $target eq 'webgrade') {
2842: if ($env{'browser.appletsuppress'} ne 'on') {
2843: $currentstring = &Apache::lonenc::encrypt_ref($token,
2844: {'code'=>$code,
2845: 'archive'=>$archive}
2846: );
2847: } else {
2848: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2849: $safeeval,undef,1);
2850: unless ($alttag) {
2851: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2852: $code);
2853: }
2854: $currentstring='[APPLET: '.$alttag.']';
2855: }
2856: } elsif ($target eq 'tex') {
2857: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2858: $safeeval,undef,1);
2859: unless ($alttag) {
2860: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2861: undef,1);
2862: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2863: $code);
2864: }
2865: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2866: '.}\end{center}';
2867: }
2868: return $currentstring;
2869: }
2870:
2871: sub end_applet {
2872: my ($target,$token) = @_;
2873: my $currentstring = '';
2874: if ($target eq 'web' || $target eq 'webgrade') {
2875: $currentstring = $token->[2];
2876: } elsif ($target eq 'tex') {
2877: }
2878: return $currentstring;
2879: }
2880:
2881: #-- <embed> tag (end tag optional/required)
2882: sub start_embed {
2883: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2884: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2885: &Apache::lonxml::extlink($src);
2886: my $currentstring = '';
2887: if ($target eq 'web' || $target eq 'webgrade') {
2888: if ($env{'browser.embedsuppress'} ne 'on') {
2889: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2890: } else {
2891: my $alttag=&Apache::lonxml::get_param
2892: ('alt',$parstack,$safeeval,undef,1);
2893: unless ($alttag) {
2894: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2895: }
2896: $currentstring='[EMBED: '.$alttag.']';
2897: }
2898: } elsif ($target eq 'tex') {
2899: }
2900: return $currentstring;
2901: }
2902:
2903: sub end_embed {
2904: my ($target,$token) = @_;
2905: my $currentstring = '';
2906: if ($target eq 'web' || $target eq 'webgrade') {
2907: $currentstring = $token->[2];
2908: } elsif ($target eq 'tex') {
2909: }
2910: return $currentstring;
2911: }
2912:
2913: #-- <param> tag (end tag forbidden)
2914: sub start_param {
2915: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2916: if (&Apache::lonxml::get_param('name',$parstack,
2917: $safeeval,undef,1)=~/^cabbase$/i) {
2918: my $value=&Apache::lonxml::get_param('value',$parstack,
2919: $safeeval,undef,1);
2920: &Apache::lonxml::extlink($value);
2921: }
2922:
2923: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2924: &Apache::lonxml::extlink($src);
2925: my $currentstring = '';
2926: if ($target eq 'web' || $target eq 'webgrade') {
2927: my %toconvert;
2928: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2929: if ($src) { $toconvert{'src'}= $src; }
2930: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
2931: undef,1);
2932: if ($name=~/^cabbase$/i) {
2933: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
2934: $safeeval,undef,1);
2935: }
2936: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
2937: } elsif ($target eq 'tex') {
2938: }
2939: return $currentstring;
2940: }
2941:
2942: sub end_param {
2943: my ($target,$token) = @_;
2944: my $currentstring = '';
2945: if ($target eq 'web' || $target eq 'webgrade') {
2946: $currentstring = $token->[2];
2947: } elsif ($target eq 'tex') {
2948: }
2949: return $currentstring;
2950: }
2951:
2952: #-- <allow> tag
2953: sub start_allow {
2954: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2955: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2956: &Apache::lonxml::extlink($src);
2957:
2958: if ($target eq 'tex') { &image_replication($src); }
2959: my $result;
2960: if ($target eq 'edit') {
2961: $result .=&Apache::edit::tag_start($target,$token);
2962: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
2963: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
2964: } elsif ($target eq 'modified') {
2965: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
2966: $safeeval,'src');
2967: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
2968: }
2969: return $result;
2970: }
2971:
2972: sub end_allow {
2973: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2974: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
2975: return '';
2976: }
2977:
2978: #-- Frames (end tag required)
2979: #-- <frameset>
2980: sub start_frameset {
2981: my ($target,$token) = @_;
2982: my $currentstring = ''; # Close any pending para.
2983: if ($target eq 'web' || $target eq 'webgrade') {
2984: if (!$Apache::lonxml::registered &&
2985: $env{'request.state'} eq 'published') {
2986: $currentstring.='<head>'.
2987: &Apache::lonmenu::registerurl(undef,$target).'</head>';
2988: }
2989: my $onLoad='';
2990: foreach my $key (keys(%{$token->[2]})) {
2991: if ($key =~ /^onload$/i) {
2992: $onLoad.=$token->[2]->{$key}.';';
2993: delete($token->[2]->{$key});
2994: }
2995: }
2996: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
2997: my $onUnload='';
2998: foreach my $key (keys(%{$token->[2]})) {
2999: if ($key =~ /^onunload$/i) {
3000: $onUnload.=$token->[2]->{$key}.';';
3001: delete($token->[2]->{$key});
3002: }
3003: }
3004: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
3005: ';'.$onUnload;
3006:
3007: $currentstring .= '<'.$token->[1];
3008: foreach (keys %{$token->[2]}) {
3009: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
3010: }
3011: $currentstring.='>';
3012: }
3013: return $currentstring;
3014: }
3015:
3016: sub end_frameset {
3017: my ($target,$token) = @_;
3018: my $currentstring = '';
3019: if ($target eq 'web' || $target eq 'webgrade') {
3020: $currentstring = $token->[2];
3021: }
3022: return $currentstring;
3023: }
3024:
3025: #-- <xmp> (end tag required)
3026: sub start_xmp {
3027: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3028: my $currentstring = '';
3029: if ($target eq 'web' || $target eq 'webgrade') {
3030: $currentstring .= $token->[4];
3031: } elsif ($target eq 'tex') {
3032: $currentstring .= '\begin{verbatim}';
3033: }
3034: return $currentstring;
3035: }
3036:
3037: sub end_xmp {
3038: my ($target,$token) = @_;
3039: my $currentstring = '';
3040: if ($target eq 'web' || $target eq 'webgrade') {
3041: $currentstring .= $token->[2];
3042: } elsif ($target eq 'tex') {
3043: $currentstring .= '\end{verbatim}';
3044: }
3045: return $currentstring;
3046: }
3047:
3048: #-- <pre> (end tag required)
3049: sub start_pre {
3050: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3051: my $currentstring = &end_p(); # close off pending <p>
3052: if ($target eq 'web' || $target eq 'webgrade') {
3053: $currentstring .= $token->[4];
3054: } elsif ($target eq 'tex') {
3055: $currentstring .= '\begin{verbatim}';
3056: }
3057: return $currentstring;
3058: }
3059:
3060: sub end_pre {
3061: my ($target,$token) = @_;
3062: my $currentstring = '';
3063: if ($target eq 'web' || $target eq 'webgrade') {
3064: $currentstring .= $token->[2];
3065: } elsif ($target eq 'tex') {
3066: $currentstring .= '\end{verbatim}';
3067: }
3068: return $currentstring;
3069: }
3070:
3071: #-- <insert>
3072: sub start_insert {
3073: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3074: my $currentstring = '';
3075: if ($target eq 'web' || $target eq 'webgrade') {
3076: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3077: $currentstring .= '<b>'.$display.'</b>';;
3078: }
3079: return $currentstring;
3080: }
3081:
3082: sub end_insert {
3083: my ($target,$token) = @_;
3084: my $currentstring = '';
3085: if ($target eq 'web' || $target eq 'webgrade') {
3086: $currentstring .= '';
3087: }
3088: return $currentstring;
3089: }
3090:
3091: #-- <externallink>
3092: sub start_externallink {
3093: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3094: my $currentstring = '';
3095: if ($target eq 'web' || $target eq 'webgrade') {
3096: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3097: $currentstring .= '<b>'.$display.'</b>';;
3098: }
3099: return $currentstring;
3100: }
3101:
3102: sub end_externallink {
3103: my ($target,$token) = @_;
3104: my $currentstring = '';
3105: if ($target eq 'web' || $target eq 'webgrade') {
3106: $currentstring .= '';
3107: }
3108: return $currentstring;
3109: }
3110:
3111: #-- <blankspace heigth="">
3112: sub start_blankspace {
3113: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3114: my $currentstring = &end_p(); # closes off any unclosed <p>
3115: if ($target eq 'tex') {
3116: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3117: $currentstring .= '\vskip '.$howmuch.' ';
3118: }
3119: return $currentstring;
3120: }
3121:
3122: sub end_blankspace {
3123: my ($target,$token) = @_;
3124: my $currentstring = '';
3125: if ($target eq 'tex') {
3126: $currentstring .= '';
3127: }
3128: return $currentstring;
3129: }
3130:
3131: #-- <abbr> tag (end tag required)
3132: sub start_abbr {
3133: my ($target,$token) = @_;
3134: my $currentstring = '';
3135: if ($target eq 'web' || $target eq 'webgrade') {
3136: $currentstring = $token->[4];
3137: }
3138: return $currentstring;
3139: }
3140:
3141: sub end_abbr {
3142: my ($target,$token) = @_;
3143: my $currentstring = '';
3144: if ($target eq 'web' || $target eq 'webgrade') {
3145: $currentstring = $token->[2];
3146: }
3147: return $currentstring;
3148: }
3149:
3150: #-- <acronym> tag (end tag required)
3151: sub start_acronym {
3152: my ($target,$token) = @_;
3153: my $currentstring = '';
3154: if ($target eq 'web' || $target eq 'webgrade') {
3155: $currentstring = $token->[4];
3156: }
3157: return $currentstring;
3158: }
3159:
3160: sub end_acronym {
3161: my ($target,$token) = @_;
3162: my $currentstring = '';
3163: if ($target eq 'web' || $target eq 'webgrade') {
3164: $currentstring = $token->[2];
3165: }
3166: return $currentstring;
3167: }
3168:
3169: #-- <area> tag (end tag forbidden)
3170: sub start_area {
3171: my ($target,$token) = @_;
3172: my $currentstring = '';
3173: if ($target eq 'web' || $target eq 'webgrade') {
3174: $currentstring = $token->[4];
3175: }
3176: return $currentstring;
3177: }
3178:
3179: sub end_area {
3180: my ($target,$token) = @_;
3181: my $currentstring = '';
3182: if ($target eq 'web' || $target eq 'webgrade') {
3183: $currentstring = $token->[2];
3184: }
3185: return $currentstring;
3186: }
3187:
3188: #-- <base> tag (end tag forbidden)
3189: sub start_base {
3190: my ($target,$token) = @_;
3191: my $currentstring = '';
3192: if ($target eq 'web' || $target eq 'webgrade') {
3193: $currentstring = $token->[4];
3194: }
3195: return $currentstring;
3196: }
3197:
3198: sub end_base {
3199: my ($target,$token) = @_;
3200: my $currentstring = '';
3201: if ($target eq 'web' || $target eq 'webgrade') {
3202: $currentstring = $token->[2];
3203: }
3204: return $currentstring;
3205: }
3206:
3207: #-- <bdo> tag (end tag required)
3208: sub start_bdo {
3209: my ($target,$token) = @_;
3210: my $currentstring = '';
3211: if ($target eq 'web' || $target eq 'webgrade') {
3212: $currentstring = $token->[4];
3213: }
3214: return $currentstring;
3215: }
3216:
3217: sub end_bdo {
3218: my ($target,$token) = @_;
3219: my $currentstring = '';
3220: if ($target eq 'web' || $target eq 'webgrade') {
3221: $currentstring = $token->[2];
3222: }
3223: return $currentstring;
3224: }
3225:
3226: #-- <bgsound> tag (end tag optional)
3227: sub start_bgsound {
3228: my ($target,$token) = @_;
3229: my $currentstring = '';
3230: if ($target eq 'web' || $target eq 'webgrade') {
3231: $currentstring = $token->[4];
3232: }
3233: return $currentstring;
3234: }
3235:
3236: sub end_bgsound {
3237: my ($target,$token) = @_;
3238: my $currentstring = '';
3239: if ($target eq 'web' || $target eq 'webgrade') {
3240: $currentstring = $token->[2];
3241: }
3242: return $currentstring;
3243: }
3244:
3245: #-- <blink> tag (end tag required)
3246: sub start_blink {
3247: my ($target,$token) = @_;
3248: my $currentstring = '';
3249: if ($target eq 'web' || $target eq 'webgrade') {
3250: $currentstring = $token->[4];
3251: }
3252: return $currentstring;
3253: }
3254:
3255: sub end_blink {
3256: my ($target,$token) = @_;
3257: my $currentstring = '';
3258: if ($target eq 'web' || $target eq 'webgrade') {
3259: $currentstring = $token->[2];
3260: }
3261: return $currentstring;
3262: }
3263:
3264: #-- <blockquote> tag (end tag required)
3265: sub start_blockquote {
3266: my ($target,$token) = @_;
3267: my $currentstring = &end_p(); # Close any unclosed <p>
3268: if ($target eq 'web' || $target eq 'webgrade') {
3269: $currentstring .= $token->[4];
3270: }
3271: return $currentstring;
3272: }
3273:
3274: sub end_blockquote {
3275: my ($target,$token) = @_;
3276: my $currentstring = '';
3277: if ($target eq 'web' || $target eq 'webgrade') {
3278: $currentstring = $token->[2];
3279: }
3280: return $currentstring;
3281: }
3282:
3283: #-- <button> tag (end tag required)
3284: sub start_button {
3285: my ($target,$token) = @_;
3286: my $currentstring = '';
3287: if ($target eq 'web' || $target eq 'webgrade') {
3288: $currentstring = $token->[4];
3289: }
3290: return $currentstring;
3291: }
3292:
3293: sub end_button {
3294: my ($target,$token) = @_;
3295: my $currentstring = '';
3296: if ($target eq 'web' || $target eq 'webgrade') {
3297: $currentstring = $token->[2];
3298: }
3299: return $currentstring;
3300: }
3301:
3302: #-- <caption> tag (end tag required)
3303: sub start_caption {
3304: my ($target,$token) = @_;
3305: my $currentstring = '';
3306: if ($target eq 'web' || $target eq 'webgrade') {
3307: $currentstring = $token->[4];
3308: }
3309: return $currentstring;
3310: }
3311:
3312: sub end_caption {
3313: my ($target,$token) = @_;
3314: my $currentstring = '';
3315: if ($target eq 'web' || $target eq 'webgrade') {
3316: $currentstring = $token->[2];
3317: }
3318: return $currentstring;
3319: }
3320:
3321: #-- <col> tag (end tag forbdden)
3322: sub start_col {
3323: my ($target,$token) = @_;
3324: my $currentstring = '';
3325: if ($target eq 'web' || $target eq 'webgrade') {
3326: $currentstring = $token->[4];
3327: }
3328: return $currentstring;
3329: }
3330:
3331: sub end_col {
3332: my ($target,$token) = @_;
3333: my $currentstring = '';
3334: if ($target eq 'web' || $target eq 'webgrade') {
3335: $currentstring = $token->[2];
3336: }
3337: return $currentstring;
3338: }
3339:
3340: #-- <colgroup> tag (end tag optional)
3341: sub start_colgroup {
3342: my ($target,$token) = @_;
3343: my $currentstring = '';
3344: if ($target eq 'web' || $target eq 'webgrade') {
3345: $currentstring = $token->[4];
3346: }
3347: return $currentstring;
3348: }
3349:
3350: sub end_colgroup {
3351: my ($target,$token) = @_;
3352: my $currentstring = '';
3353: if ($target eq 'web' || $target eq 'webgrade') {
3354: $currentstring = $token->[2];
3355: }
3356: return $currentstring;
3357: }
3358:
3359: #-- <del> tag (end tag required)
3360: sub start_del {
3361: my ($target,$token) = @_;
3362: my $currentstring = '';
3363: if ($target eq 'web' || $target eq 'webgrade') {
3364: $currentstring = $token->[4];
3365: }
3366: return $currentstring;
3367: }
3368:
3369: sub end_del {
3370: my ($target,$token) = @_;
3371: my $currentstring = '';
3372: if ($target eq 'web' || $target eq 'webgrade') {
3373: $currentstring = $token->[2];
3374: }
3375: return $currentstring;
3376: }
3377:
3378: #-- <fieldset> tag (end tag required)
3379: sub start_fieldset {
3380: my ($target,$token) = @_;
3381: my $currentstring = '';
3382: if ($target eq 'web' || $target eq 'webgrade') {
3383: $currentstring = $token->[4];
3384: }
3385: return $currentstring;
3386: }
3387:
3388: sub end_fieldset {
3389: my ($target,$token) = @_;
3390: my $currentstring = '';
3391: if ($target eq 'web' || $target eq 'webgrade') {
3392: $currentstring = $token->[2];
3393: }
3394: return $currentstring;
3395: }
3396:
3397: #-- <frame> tag (end tag forbidden)
3398: sub start_frame {
3399: my ($target,$token) = @_;
3400: my $currentstring = '';
3401: if ($target eq 'web' || $target eq 'webgrade') {
3402: $currentstring = $token->[4];
3403: }
3404: return $currentstring;
3405: }
3406:
3407: sub end_frame {
3408: my ($target,$token) = @_;
3409: my $currentstring = '';
3410: if ($target eq 'web' || $target eq 'webgrade') {
3411: $currentstring = $token->[2];
3412: }
3413: return $currentstring;
3414: }
3415:
3416: #-- <iframe> tag (end tag required)
3417: sub start_iframe {
3418: my ($target,$token) = @_;
3419: my $currentstring = '';
3420: if ($target eq 'web' || $target eq 'webgrade') {
3421: $currentstring = $token->[4];
3422: }
3423: return $currentstring;
3424: }
3425:
3426: sub end_iframe {
3427: my ($target,$token) = @_;
3428: my $currentstring = '';
3429: if ($target eq 'web' || $target eq 'webgrade') {
3430: $currentstring = $token->[2];
3431: }
3432: return $currentstring;
3433: }
3434:
3435: #-- <ins> tag (end tag required)
3436: sub start_ins {
3437: my ($target,$token) = @_;
3438: my $currentstring = '';
3439: if ($target eq 'web' || $target eq 'webgrade') {
3440: $currentstring = $token->[4];
3441: }
3442: return $currentstring;
3443: }
3444:
3445: sub end_ins {
3446: my ($target,$token) = @_;
3447: my $currentstring = '';
3448: if ($target eq 'web' || $target eq 'webgrade') {
3449: $currentstring = $token->[2];
3450: }
3451: return $currentstring;
3452: }
3453:
3454: #-- <isindex> tag (end tag forbidden)
3455: sub start_isindex {
3456: my ($target,$token) = @_;
3457: my $currentstring = '';
3458: if ($target eq 'web' || $target eq 'webgrade') {
3459: $currentstring = $token->[4];
3460: }
3461: return $currentstring;
3462: }
3463:
3464: sub end_isindex {
3465: my ($target,$token) = @_;
3466: my $currentstring = '';
3467: if ($target eq 'web' || $target eq 'webgrade') {
3468: $currentstring = $token->[2];
3469: }
3470: return $currentstring;
3471: }
3472:
3473: #-- <keygen> tag (end tag forbidden)
3474: sub start_keygen {
3475: my ($target,$token) = @_;
3476: my $currentstring = '';
3477: if ($target eq 'web' || $target eq 'webgrade') {
3478: $currentstring = $token->[4];
3479: }
3480: return $currentstring;
3481: }
3482:
3483: sub end_keygen {
3484: my ($target,$token) = @_;
3485: my $currentstring = '';
3486: if ($target eq 'web' || $target eq 'webgrade') {
3487: $currentstring = $token->[2];
3488: }
3489: return $currentstring;
3490: }
3491:
3492: #-- <label> tag
3493: sub start_label {
3494: my ($target,$token) = @_;
3495: my $currentstring = '';
3496: if ($target eq 'web' || $target eq 'webgrade') {
3497: $currentstring = $token->[4];
3498: }
3499: return $currentstring;
3500: }
3501:
3502: sub end_label {
3503: my ($target,$token) = @_;
3504: my $currentstring = '';
3505: if ($target eq 'web' || $target eq 'webgrade') {
3506: $currentstring = $token->[2];
3507: }
3508: return $currentstring;
3509: }
3510:
3511: #-- <layer> tag (end tag required)
3512: sub start_layer {
3513: my ($target,$token) = @_;
3514: my $currentstring = '';
3515: if ($target eq 'web' || $target eq 'webgrade') {
3516: $currentstring = $token->[4];
3517: }
3518: return $currentstring;
3519: }
3520:
3521: sub end_layer {
3522: my ($target,$token) = @_;
3523: my $currentstring = '';
3524: if ($target eq 'web' || $target eq 'webgrade') {
3525: $currentstring = $token->[2];
3526: }
3527: return $currentstring;
3528: }
3529:
3530: #-- <legend> tag (end tag required)
3531: sub start_legend {
3532: my ($target,$token) = @_;
3533: my $currentstring = '';
3534: if ($target eq 'web' || $target eq 'webgrade') {
3535: $currentstring = $token->[4];
3536: }
3537: return $currentstring;
3538: }
3539:
3540: sub end_legend {
3541: my ($target,$token) = @_;
3542: my $currentstring = '';
3543: if ($target eq 'web' || $target eq 'webgrade') {
3544: $currentstring = $token->[2];
3545: }
3546: return $currentstring;
3547: }
3548:
3549: #-- <link> tag (end tag forbidden)
3550: sub start_link {
3551: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3552: my $currentstring = '';
3553: if ($target eq 'web') {
3554: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3555: undef,1);
3556: &Apache::lonxml::extlink($href);
3557: $currentstring = $token->[4];
3558: }
3559: return $currentstring;
3560: }
3561:
3562: sub end_link {
3563: my ($target,$token) = @_;
3564: my $currentstring = '';
3565: if ($target eq 'web' || $target eq 'webgrade') {
3566: $currentstring = $token->[2];
3567: }
3568: return $currentstring;
3569: }
3570:
3571: #-- <marquee> tag (end tag optional)
3572: sub start_marquee {
3573: my ($target,$token) = @_;
3574: my $currentstring = '';
3575: if ($target eq 'web' || $target eq 'webgrade') {
3576: $currentstring = $token->[4];
3577: }
3578: return $currentstring;
3579: }
3580:
3581: sub end_marquee {
3582: my ($target,$token) = @_;
3583: my $currentstring = '';
3584: if ($target eq 'web' || $target eq 'webgrade') {
3585: $currentstring = $token->[2];
3586: }
3587: return $currentstring;
3588: }
3589:
3590: #-- <multicol> tag (end tag required)
3591: sub start_multicol {
3592: my ($target,$token) = @_;
3593: my $currentstring = &end_p(); # Close any pending <p>
3594: if ($target eq 'web' || $target eq 'webgrade') {
3595: $currentstring .= $token->[4];
3596: }
3597: return $currentstring;
3598: }
3599:
3600: sub end_multicol {
3601: my ($target,$token) = @_;
3602: my $currentstring = '';
3603: if ($target eq 'web' || $target eq 'webgrade') {
3604: $currentstring = $token->[2];
3605: }
3606: return $currentstring;
3607: }
3608:
3609: #-- <nobr> tag (end tag required)
3610: sub start_nobr {
3611: my ($target,$token) = @_;
3612: my $currentstring = '';
3613: if ($target eq 'web' || $target eq 'webgrade') {
3614: $currentstring = $token->[4];
3615: } elsif ($target eq 'tex') {
3616: $currentstring='\mbox{';
3617: }
3618: return $currentstring;
3619: }
3620:
3621: sub end_nobr {
3622: my ($target,$token) = @_;
3623: my $currentstring = '';
3624: if ($target eq 'web' || $target eq 'webgrade') {
3625: $currentstring = $token->[2];
3626: } elsif ($target eq 'tex') {
3627: $currentstring='}';
3628: }
3629: return $currentstring;
3630: }
3631:
3632: #-- <noembed> tag (end tag required)
3633: sub start_noembed {
3634: my ($target,$token) = @_;
3635: my $currentstring = '';
3636: if ($target eq 'web' || $target eq 'webgrade') {
3637: $currentstring = $token->[4];
3638: }
3639: return $currentstring;
3640: }
3641:
3642: sub end_noembed {
3643: my ($target,$token) = @_;
3644: my $currentstring = '';
3645: if ($target eq 'web' || $target eq 'webgrade') {
3646: $currentstring = $token->[2];
3647: }
3648: return $currentstring;
3649: }
3650:
3651: #-- <noframes> tag (end tag required)
3652: sub start_noframes {
3653: my ($target,$token) = @_;
3654: my $currentstring = '';
3655: if ($target eq 'web' || $target eq 'webgrade') {
3656: $currentstring = $token->[4];
3657: }
3658: return $currentstring;
3659: }
3660:
3661: sub end_noframes {
3662: my ($target,$token) = @_;
3663: my $currentstring = '';
3664: if ($target eq 'web' || $target eq 'webgrade') {
3665: $currentstring = $token->[2];
3666: }
3667: return $currentstring;
3668: }
3669:
3670: #-- <nolayer> tag (end tag required)
3671: sub start_nolayer {
3672: my ($target,$token) = @_;
3673: my $currentstring = '';
3674: if ($target eq 'web' || $target eq 'webgrade') {
3675: $currentstring = $token->[4];
3676: }
3677: return $currentstring;
3678: }
3679:
3680: sub end_nolayer {
3681: my ($target,$token) = @_;
3682: my $currentstring = '';
3683: if ($target eq 'web' || $target eq 'webgrade') {
3684: $currentstring = $token->[2];
3685: }
3686: return $currentstring;
3687: }
3688:
3689: #-- <noscript> tag (end tag required)
3690: sub start_noscript {
3691: my ($target,$token) = @_;
3692: my $currentstring = '';
3693: if ($target eq 'web' || $target eq 'webgrade') {
3694: $currentstring = $token->[4];
3695: }
3696: return $currentstring;
3697: }
3698:
3699: sub end_noscript {
3700: my ($target,$token) = @_;
3701: my $currentstring = '';
3702: if ($target eq 'web' || $target eq 'webgrade') {
3703: $currentstring = $token->[2];
3704: }
3705: return $currentstring;
3706: }
3707:
3708: #-- <object> tag (end tag required)
3709: sub start_object {
3710: my ($target,$token) = @_;
3711: my $currentstring = '';
3712: if ($target eq 'web' || $target eq 'webgrade') {
3713: $currentstring = $token->[4];
3714: }
3715: return $currentstring;
3716: }
3717:
3718: sub end_object {
3719: my ($target,$token) = @_;
3720: my $currentstring = '';
3721: if ($target eq 'web' || $target eq 'webgrade') {
3722: $currentstring = $token->[2];
3723: }
3724: return $currentstring;
3725: }
3726:
3727: #-- <optgroup> tag (end tag required)
3728: sub start_optgroup {
3729: my ($target,$token) = @_;
3730: my $currentstring = '';
3731: if ($target eq 'web' || $target eq 'webgrade') {
3732: $currentstring = $token->[4];
3733: }
3734: return $currentstring;
3735: }
3736:
3737: sub end_optgroup {
3738: my ($target,$token) = @_;
3739: my $currentstring = '';
3740: if ($target eq 'web' || $target eq 'webgrade') {
3741: $currentstring = $token->[2];
3742: }
3743: return $currentstring;
3744: }
3745:
3746: #-- <samp> tag (end tag required)
3747: sub start_samp {
3748: my ($target,$token) = @_;
3749: my $currentstring = '';
3750: if ($target eq 'web' || $target eq 'webgrade') {
3751: $currentstring = $token->[4];
3752: } elsif ($target eq 'tex') {
3753: $currentstring='\texttt{';
3754: }
3755: return $currentstring;
3756: }
3757:
3758: sub end_samp {
3759: my ($target,$token) = @_;
3760: my $currentstring = '';
3761: if ($target eq 'web' || $target eq 'webgrade') {
3762: $currentstring = $token->[2];
3763: } elsif ($target eq 'tex') {
3764: $currentstring='}';
3765: }
3766: return $currentstring;
3767: }
3768:
3769: #-- <server> tag
3770: sub start_server {
3771: my ($target,$token) = @_;
3772: my $currentstring = '';
3773: if ($target eq 'web' || $target eq 'webgrade') {
3774: $currentstring = $token->[4];
3775: }
3776: return $currentstring;
3777: }
3778:
3779: sub end_server {
3780: my ($target,$token) = @_;
3781: my $currentstring = '';
3782: if ($target eq 'web' || $target eq 'webgrade') {
3783: $currentstring = $token->[2];
3784: }
3785: return $currentstring;
3786: }
3787:
3788: #-- <spacer> tag (end tag forbidden)
3789: sub start_spacer {
3790: my ($target,$token) = @_;
3791: my $currentstring = &end_p(); # Close off any open <p> tag.
3792: if ($target eq 'web' || $target eq 'webgrade') {
3793: $currentstring .= $token->[4];
3794: }
3795: return $currentstring;
3796: }
3797:
3798: sub end_spacer {
3799: my ($target,$token) = @_;
3800: my $currentstring = '';
3801: if ($target eq 'web' || $target eq 'webgrade') {
3802: $currentstring = $token->[2];
3803: }
3804: return $currentstring;
3805: }
3806:
3807: #-- <span> tag (end tag required)
3808: sub start_span {
3809: my ($target,$token) = @_;
3810: my $currentstring = '';
3811: if ($target eq 'web' || $target eq 'webgrade') {
3812: $currentstring = $token->[4];
3813: }
3814: return $currentstring;
3815: }
3816:
3817: sub end_span {
3818: my ($target,$token) = @_;
3819: my $currentstring = '';
3820: if ($target eq 'web' || $target eq 'webgrade') {
3821: $currentstring = $token->[2];
3822: }
3823: return $currentstring;
3824: }
3825:
3826: #-- <tbody> tag (end tag optional)
3827: sub start_tbody {
3828: my ($target,$token) = @_;
3829: my $currentstring = '';
3830: if ($target eq 'web' || $target eq 'webgrade') {
3831: $currentstring = $token->[4];
3832: }
3833: return $currentstring;
3834: }
3835:
3836: sub end_tbody {
3837: my ($target,$token) = @_;
3838: my $currentstring = '';
3839: if ($target eq 'web' || $target eq 'webgrade') {
3840: $currentstring = $token->[2];
3841: }
3842: return $currentstring;
3843: }
3844:
3845: #-- <tfoot> tag (end tag optional)
3846: sub start_tfoot {
3847: my ($target,$token) = @_;
3848: my $currentstring = '';
3849: if ($target eq 'web' || $target eq 'webgrade') {
3850: $currentstring = $token->[4];
3851: }
3852: return $currentstring;
3853: }
3854:
3855: sub end_tfoot {
3856: my ($target,$token) = @_;
3857: my $currentstring = '';
3858: if ($target eq 'web' || $target eq 'webgrade') {
3859: $currentstring = $token->[2];
3860: }
3861: return $currentstring;
3862: }
3863:
3864: #-- <thead> tag (end tag optional)
3865: sub start_thead {
3866: my ($target,$token) = @_;
3867: my $currentstring = '';
3868: if ($target eq 'web' || $target eq 'webgrade') {
3869: $currentstring = $token->[4];
3870: }
3871: return $currentstring;
3872: }
3873:
3874: sub end_thead {
3875: my ($target,$token) = @_;
3876: my $currentstring = '';
3877: if ($target eq 'web' || $target eq 'webgrade') {
3878: $currentstring = $token->[2];
3879: }
3880: return $currentstring;
3881: }
3882:
3883: #-- <var> tag
3884: sub start_var {
3885: my ($target,$token) = @_;
3886: my $currentstring = '';
3887: if ($target eq 'web' || $target eq 'webgrade') {
3888: $currentstring = $token->[4];
3889: } elsif ($target eq 'tex') {
3890: $currentstring = '\textit{';
3891: }
3892: return $currentstring;
3893: }
3894:
3895: sub end_var {
3896: my ($target,$token) = @_;
3897: my $currentstring = '';
3898: if ($target eq 'web' || $target eq 'webgrade') {
3899: $currentstring = $token->[2];
3900: } elsif ($target eq 'tex') {
3901: $currentstring = '}';
3902: }
3903: return $currentstring;
3904: }
3905:
3906: #-- <wbr> tag (end tag forbidden)
3907: sub start_wbr {
3908: my ($target,$token) = @_;
3909: my $currentstring = '';
3910: if ($target eq 'web' || $target eq 'webgrade') {
3911: $currentstring = $token->[4];
3912: }
3913: return $currentstring;
3914: }
3915:
3916: sub end_wbr {
3917: my ($target,$token) = @_;
3918: my $currentstring = '';
3919: if ($target eq 'web' || $target eq 'webgrade') {
3920: $currentstring = $token->[2];
3921: }
3922: return $currentstring;
3923: }
3924:
3925: #-- <hideweboutput> tag
3926: sub start_hideweboutput {
3927: my ($target,$token) = @_;
3928: if ($target eq 'web' || $target eq 'webgrade') {
3929: &Apache::lonxml::startredirection();
3930: }
3931: return '';
3932: }
3933:
3934: sub end_hideweboutput {
3935: my ($target,$token) = @_;
3936: my $currentstring = '';
3937: if ($target eq 'web' || $target eq 'webgrade') {
3938: $currentstring = &Apache::lonxml::endredirection();
3939: }
3940: return '';
3941: }
3942:
3943:
3944: sub image_replication {
3945: my $src = shift;
3946: if (not -e $src) { &Apache::lonnet::repcopy($src); }
3947: #replicates eps or ps
3948: my $epssrc = my $pssrc = $src;
3949: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
3950: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
3951: if (not -e $epssrc && not -e $pssrc) {
3952: my $result=&Apache::lonnet::repcopy($epssrc);
3953: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
3954: }
3955: return '';
3956: }
3957: #
3958: # Get correct sizing parameter for an image given
3959: # it's initial ht. and wid. This allows sizing of
3960: # images that are generated on-the-fly (e.g. gnuplot)
3961: # as well as serving as a utility for image_size.
3962: #
3963: # Parameter:
3964: # height_param
3965: # width_param - Initial picture dimensions.
3966: # scaling - A scale factor.
3967: # parstack, - the current stack of tag attributes
3968: # from the xml parser
3969: # safeeval, - pointer to the safespace
3970: # depth, - from what level in the stack to look for attributes
3971: # (assumes -1 if unspecified)
3972: # cis - look for attrubutes case insensitively
3973: # (assumes false)
3974: #
3975: # Returns:
3976: # height, width - new dimensions.
3977: #
3978: sub resize_image {
3979: my ($height_param, $width_param, $scaling,
3980: $parstack, $safeeval, $depth, $cis) = @_;
3981:
3982: # First apply the scaling...
3983:
3984: $height_param = $height_param * $scaling;
3985: $width_param = $width_param * $scaling;
3986:
3987: #do we have any specified LaTeX size of the picture?
3988: my $toget='TeXwidth';
3989: if ($cis) {
3990: $toget=lc($toget);
3991: }
3992: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
3993: $safeeval,$depth,$cis);
3994: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
3995: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
3996: $safeeval,$depth,$cis);
3997: #do we have any specified web size of the picture?
3998: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
3999: $depth,1);
4000: if ($TeXwidth) {
4001: my $old_width_param=$width_param;
4002: if ($TeXwidth=~/(\d+)\s*\%/) {
4003: $width_param = $1*$env{'form.textwidth'}/100;
4004: } else {
4005: $width_param = $TeXwidth;
4006: }
4007: if ($TeXheight) {
4008: $height_param = $TeXheight;
4009: } elsif ($old_width_param) {
4010: $height_param=$TeXwidth/$old_width_param*$height_param;
4011: }
4012: } elsif ($TeXheight) {
4013: $height_param = $TeXheight;
4014: if ($height_param) {
4015: $width_param = $TeXheight/$height_param*$width_param;
4016: }
4017: } elsif ($width) {
4018: my $old_width_param=$width_param;
4019: $width_param = $width*$scaling;
4020: if ($old_width_param) {
4021: $height_param=$width_param/$old_width_param*$height_param;
4022: }
4023: }
4024: if ($width_param > $env{'form.textwidth'}) {
4025: my $old_width_param=$width_param;
4026: $width_param =0.95*$env{'form.textwidth'};
4027: if ($old_width_param) {
4028: $height_param=$width_param/$old_width_param*$height_param;
4029: }
4030: }
4031:
4032: return ($height_param, $width_param);
4033: }
4034:
4035: sub image_size {
4036: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4037:
4038: #size of image from gif/jpg/jpeg/png
4039: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4040: if (-e $ressrc) {
4041: $src = $ressrc;
4042: }
4043: my $image = Image::Magick->new;
4044: my $current_figure = $image->Read($src);
4045: my $width_param = $image->Get('width');
4046: my $height_param = $image->Get('height');
4047: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4048: undef($image);
4049:
4050: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4051: $scaling, $parstack, $safeeval,
4052: $depth, $cis);
4053:
4054: return ($height_param, $width_param);
4055: }
4056:
4057: sub image_width {
4058: my ($height, $width) = &image_size(@_);
4059: return $width;
4060: }
4061: # Not yet 100% sure this is correct in all circumstances..
4062: # due to my uncertainty about mods to image_size.
4063: #
4064: sub image_height {
4065: my ($height, $width) = &image_size(@_);
4066: return $height;
4067: }
4068:
4069: sub get_eps_image {
4070: my ($src)=@_;
4071: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4072:
4073: # In order to prevent the substitution of the alt text, we need to
4074: # be sure the orig_src file is on system now so:
4075:
4076: if (! -e $orig_src) {
4077: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4078: }
4079: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4080: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4081: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4082: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4083: &Apache::lonxml::debug("Filelocation gives: $src");
4084: if (! -e $src) {
4085: &Apache::lonxml::debug("$src does not exist");
4086: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4087: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4088: #if replication failed try to find ps file
4089: $src=~s/\.eps$/\.ps/;
4090: &Apache::lonxml::debug("Now looking for $src");
4091: #if no ps file try to replicate it.
4092: my $didrepcopy = &Apache::lonnet::repcopy($src);
4093: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4094: if ( (not -e $src) ||
4095: ($didrepcopy ne 'ok')) {
4096: &Apache::lonxml::debug("Failed to find or replicate $src");
4097:
4098: #if replication failed try to produce eps file dynamically
4099: $src=~s/\.ps$/\.eps/;
4100: my $temp_file;
4101: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4102: my $newsrc=$orig_src;
4103: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4104: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4105: print FILE "$newsrc\n";
4106: close FILE;
4107: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4108: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4109: if ($sext ne "") { # Put the ext. back in to uniquify.
4110: $src =~ s/\.eps$/$sext.eps/;
4111: }
4112: }
4113: }
4114: }
4115: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4116: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4117: return ($path.'/',$file);
4118: }
4119:
4120: sub eps_generation {
4121: my ($src,$file,$width_param) = @_;
4122: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4123: my $temp_file = Apache::File->new('>>'.$filename);
4124: print $temp_file "$src\n";
4125: my $newsrc = $src;
4126: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4127: $newsrc=~s/\/home\/httpd\/html\/res//;
4128: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4129: $newsrc=~s/\/\.\//\//;
4130: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4131: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4132: $newsrc=~s/\/home\/httpd\/lonUsers//;
4133: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4134: }
4135: if ($newsrc=~/\/userfiles\//) {
4136: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4137: } else {
4138: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4139: }
4140: }
4141:
4142: sub file_path {
4143: my $src=shift;
4144: my ($file,$path);
4145: if ($src =~ m!(.*)/([^/]*)$!) {
4146: $file = $2;
4147: $path = $1.'/';
4148: }
4149: return $file,$path;
4150: }
4151: # Converts a measurement in to mm from any of
4152: # the other valid LaTeX units of measure.
4153: # If the units of measure are missing from the
4154: # parameter, it is assumed to be in and returned
4155: # with mm units of measure
4156: sub recalc {
4157: my $argument = shift;
4158: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4159: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4160: my $value=$1;
4161: my $units=$2;
4162: if ($units eq 'cm') {
4163: $value*=10;
4164: } elsif ($units eq 'in') {
4165: $value*=25.4;
4166: } elsif ($units eq 'pc') {
4167: $value*=(25.4*12/72.27);
4168: } elsif ($units eq 'pt') {
4169: $value*=(25.4/72.27);
4170: }
4171: return $value.' mm';
4172: }
4173:
4174: sub LATEX_length {
4175: my $garbage=shift;
4176: $garbage=~s/^\s+$//;
4177: $garbage=~s/^\s+(\S.*)/$1/;#space before
4178: $garbage=~s/(.*\S)\s+$/$1/;#space after
4179: $garbage=~s/(\s)+/$1/;#only one space
4180: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4181: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4182: $garbage=~s/([^\\])\$/$1/g;#$
4183: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4184: $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;
4185: $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;
4186: $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;
4187: $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;
4188: $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;
4189: $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;
4190: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4191: #remove some other LaTeX command
4192: $garbage=~s|\\(\w+)\\|\\|g;
4193: $garbage=~s|\\(\w+)(\s*)|$2|g;
4194: $garbage=~s|\+|11|g;
4195: my $value=length($garbage);
4196: return $value;
4197: }
4198:
4199:
4200: # is_inside_of $tagstack $tag
4201: # This sub returns true if the current state of Xml processing
4202: # is inside of the tag.
4203: # Parameters:
4204: # tagstack - The tagstack from the parser.
4205: # tag - The tag (without the <>'s.).
4206: # Sample usage:
4207: # if (is_inside_of($tagstack "table")) {
4208: # # I'm in a table....
4209: # }
4210: sub is_inside_of {
4211: my ($tagstack, $tag) = @_;
4212: my @stack = @$tagstack;
4213: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4214: if ($stack[$i] eq $tag) {
4215: return 1;
4216: }
4217: }
4218: return 0;
4219: }
4220:
4221:
4222: 1;
4223: __END__
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