1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.302.2.5 2006/03/29 23:00:51 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' || $target eq 'webgrade') {
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' || $target eq 'webgrade') {
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' && $env{'request.state'} eq 'published') ||
224: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
225: $currentstring = &Apache::lonmenu::registerurl(undef,$target).
226: $token->[2];
227: }
228: return $currentstring;
229: }
230:
231: #-- <map> tag (end tag required)
232: sub start_map {
233: my ($target,$token) = @_;
234: my $currentstring = '';
235: if ($target eq 'web' || $target eq 'webgrade') {
236: $currentstring = $token->[4];
237: }
238: return $currentstring;
239: }
240:
241: sub end_map {
242: my ($target,$token) = @_;
243: my $currentstring = '';
244: if ($target eq 'web' || $target eq 'webgrade') {
245: $currentstring = $token->[2];
246: }
247: return $currentstring;
248: }
249:
250: #-- <select> tag (end tag required)
251: sub start_select {
252: my ($target,$token) = @_;
253: my $currentstring = '';
254: if ($target eq 'web' || $target eq 'webgrade') {
255: $currentstring = $token->[4];
256: } elsif ($target eq 'tex') {
257: $Apache::londefdef::select=0;
258: }
259: return $currentstring;
260: }
261:
262: sub end_select {
263: my ($target,$token) = @_;
264: my $currentstring = '';
265: if ($target eq 'web' || $target eq 'webgrade') {
266: $currentstring = $token->[2];
267: }
268: return $currentstring;
269: }
270:
271: #-- <option> tag (end tag optional)
272: sub start_option {
273: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
274: my $currentstring = '';
275: if ($target eq 'web' || $target eq 'webgrade') {
276: $currentstring = $token->[4];
277: } elsif ($target eq 'tex') {
278: $Apache::londefdef::select++;
279: if ($Apache::londefdef::select == 1) {
280: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
281: } else {
282: $currentstring='\keephidden{';
283: }
284: }
285: return $currentstring;
286: }
287:
288: sub end_option {
289: my ($target,$token) = @_;
290: my $currentstring = '';
291: if ($target eq 'web' || $target eq 'webgrade') {
292: $currentstring = $token->[2];
293: } elsif ($target eq 'tex') {
294: $currentstring='}';
295: }
296: return $currentstring;
297: }
298:
299: #-- <input> tag (end tag forbidden)
300: sub start_input {
301: my ($target,$token) = @_;
302: my $currentstring = '';
303: if ($target eq 'web' || $target eq 'webgrade') {
304: $currentstring = $token->[4];
305: }
306: return $currentstring;
307: }
308:
309: sub end_input {
310: my ($target,$token) = @_;
311: my $currentstring = '';
312: if ($target eq 'web' || $target eq 'webgrade') {
313: $currentstring = $token->[2];
314: }
315: return $currentstring;
316: }
317:
318: #-- <textarea> tag (end tag required)
319: sub start_textarea {
320: my ($target,$token) = @_;
321: my $currentstring = '';
322: if ($target eq 'web' || $target eq 'webgrade') {
323: $currentstring = $token->[4];
324: }
325: return $currentstring;
326: }
327:
328: sub end_textarea {
329: my ($target,$token) = @_;
330: my $currentstring = '';
331: if ($target eq 'web' || $target eq 'webgrade') {
332: $currentstring = $token->[2];
333: }
334: return $currentstring;
335: }
336:
337: #-- <form> tag (end tag required)
338: sub start_form {
339: my ($target,$token) = @_;
340: my $currentstring = '';
341: if ($target eq 'web' || $target eq 'webgrade') {
342: $currentstring = $token->[4];
343: }
344: return $currentstring;
345: }
346:
347: sub end_form {
348: my ($target,$token) = @_;
349: my $currentstring = '';
350: if ($target eq 'web' || $target eq 'webgrade') {
351: $currentstring = $token->[2];
352: }
353: return $currentstring;
354: }
355:
356: #-- <title> tag (end tag required)
357: sub start_title {
358: my ($target,$token) = @_;
359: my $currentstring = '';
360: if ($target eq 'web' || $target eq 'webgrade') {
361: $currentstring = $token->[4];
362: } elsif ($target eq 'tex') {
363: $currentstring .= '\keephidden{Title of the document: '
364: }
365: if ($target eq 'meta') {
366: $currentstring='<title>';
367: &start_output($target);
368: }
369: return $currentstring;
370: }
371:
372: sub end_title {
373: my ($target,$token) = @_;
374: my $currentstring = '';
375: if ($target eq 'web' || $target eq 'webgrade') {
376: $currentstring = $token->[2];
377: } elsif ($target eq 'tex') {
378: $currentstring .= '}';
379: }
380: if ($target eq 'meta') {
381: &end_output($target);
382: $currentstring='</title>';
383: }
384: return $currentstring;
385: }
386:
387: #-- <meta> tag (end tag forbidden)
388: sub start_meta {
389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
390: my $currentstring = '';
391: if ($target eq 'web' || $target eq 'webgrade') {
392: my $args='';
393: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
394: if ($args eq '') {
395: &Apache::lonxml::get_all_text("/meta",$parser,$style);
396: } else {
397: $currentstring = $token->[4];
398: }
399: } elsif ($target eq 'meta') {
400: unless (&Apache::lonxml::get_param
401: ('http-equiv',$parstack,$safeeval,undef,1)) {
402: my $name=$token->[2]->{'name'};
403: $name=~tr/A-Z/a-z/;
404: $name=~s/\s/\_/gs;
405: $name=~s/\W//gs;
406: if ($name) {
407: $currentstring='<'.$name;
408: my $display=&Apache::lonxml::get_param
409: ('display',$parstack,$safeeval,undef,1);
410: if ($display) {
411: $display=~s/\"/\'/g;
412: $currentstring.=' display="'.$display.'"';
413: }
414: $currentstring.='>'.
415: &Apache::lonxml::get_param
416: ('content',$parstack,$safeeval,undef,1).
417: '</'.$name.'>';
418: }
419: my $display=&Apache::lonxml::get_param
420: ('display',$parstack,$safeeval,undef,1);
421: if ($display) {
422: $display=&HTML::Entities::encode($display,'<>&"');
423: $currentstring.='<'.$name.'.display>'.$display.
424: '</'.$name.'.display>';
425: }
426: }
427: } elsif ($target eq 'tex') {
428: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
429: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
430: if ((not defined $content) && (not defined $name)) {
431: &Apache::lonxml::startredirection();
432: }
433: }
434: return $currentstring;
435: }
436:
437: sub end_meta {
438: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
439: my $currentstring = '';
440: if ($target eq 'web' || $target eq 'webgrade') {
441: my $args='';
442: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
443: if ($args ne '') {
444: $currentstring = $token->[4];
445: }
446: } elsif ($target eq 'tex') {
447: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
448: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
449: if ((not defined $content) && (not defined $name)) {
450: &Apache::lonxml::endredirection();
451: }
452: }
453: return $currentstring;
454: }
455:
456: # accessrule
457: sub start_accessrule {
458: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
459: my $currentstring = '';
460: my $eff=&Apache::lonxml::get_param
461: ('effect',$parstack,$safeeval,undef,1);
462: my $realm=&Apache::lonxml::get_param
463: ('realm',$parstack,$safeeval,undef,1);
464: my $role=&Apache::lonxml::get_param
465: ('role',$parstack,$safeeval,undef,1);
466: $realm=~s/\s+//g;
467: $realm=~s/\//\_/g;
468: $realm=~s/^\_//;
469: $realm=~s/\W/\;/g;
470: $role=~s/\s+//g;
471: $role=~s/\//\_/g;
472: $role=~s/\W/\;/g;
473: if ($target eq 'web') {
474: my $args='';
475: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
476: if ($args eq '') {
477: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
478: } else {
479: $currentstring = $token->[4];
480: }
481: }
482: if ($target eq 'meta') {
483: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
484: }
485: return $currentstring;
486: }
487:
488: sub end_accessrule {
489: my ($target,$token,$tagstack,$parstack,$parser) = @_;
490: my $currentstring = '';
491: if ($target eq 'web') {
492: my $args='';
493: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
494: if ($args ne '') {
495: $currentstring = $token->[4];
496: }
497: }
498: return $currentstring;
499: }
500:
501: #-- <body> tag (end tag required)
502: sub start_body {
503: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
504: my $currentstring = '';
505:
506: if ($target eq 'web' || $target eq 'webgrade') {
507: if ($Apache::lonhomework::parsing_a_problem) {
508: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
509: return '';
510: }
511: if (!$Apache::lonxml::registered &&
512: $env{'request.state'} eq 'published') {
513: $currentstring.='<head>'.
514: &Apache::lonmenu::registerurl(undef,$target).'</head>';
515: }
516: # Accessibility
517: if ($env{'browser.imagesuppress'} eq 'on') {
518: delete($token->[2]->{'background'});
519: }
520: if ($env{'browser.fontenhance'} eq 'on') {
521: my $style='';
522: foreach my $key (keys(%{$token->[2]})) {
523: if ($key =~ /^style$/i) {
524: $style.=$token->[2]->{$key}.';';
525: delete($token->[2]->{$key});
526: }
527: }
528: $token->[2]->{'style'}=$style.'; font-size: x-large;';
529: }
530: if ($env{'browser.blackwhite'} eq 'on') {
531: delete($token->[2]->{'font'});
532: delete($token->[2]->{'link'});
533: delete($token->[2]->{'alink'});
534: delete($token->[2]->{'vlink'});
535: delete($token->[2]->{'bgcolor'});
536: delete($token->[2]->{'background'});
537: }
538: # Overload loads
539: my $onLoad='';
540: foreach my $key (keys(%{$token->[2]})) {
541: if ($key =~ /^onload$/i) {
542: $onLoad.=$token->[2]->{$key}.';';
543: delete($token->[2]->{$key});
544: }
545: }
546: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
547: my $onUnload='';
548: foreach my $key (keys(%{$token->[2]})) {
549: if ($key =~ /^onunload$/i) {
550: $onUnload.=$token->[2]->{$key}.';';
551: delete($token->[2]->{$key});
552: }
553: }
554: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
555: ';'.$onUnload;
556:
557: $currentstring .= '<'.$token->[1];
558: foreach (keys %{$token->[2]}) {
559: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
560: }
561: $currentstring.='>';
562: &Apache::lontexconvert::jsMath_reset();
563: if ($env{'environment.texengine'} eq 'jsMath') {
564: $currentstring.=&Apache::lontexconvert::jsMath_header();
565: }
566: if ($env{'request.state'} ne 'published') {
567: if ($env{'environment.remote'} eq 'off') {
568: $currentstring.=
569: &Apache::lonmenu::constspaceform().
570: &Apache::lonmenu::menubuttons(1,'web',1);
571: }
572: $currentstring.=(<<EDITBUTTON);
573: <form method="post">
574: <input type="submit" name="editmode" accesskey="e" value="Edit" />
575: </form>
576: EDITBUTTON
577: } else {
578: $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
579: }
580: $currentstring.=&Apache::lonxml::message_location();
581: } elsif ($target eq 'tex') {
582: $currentstring = '\begin{document}';
583: }
584: return $currentstring;
585: }
586:
587: sub end_body {
588: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
589: my $currentstring = &end_p(); # Close off unclosed <p>
590: if ($target eq 'web' || $target eq 'webgrade') {
591: $currentstring .= &Apache::lonxml::xmlend($target,$parser);
592: } elsif ($target eq 'tex') {
593: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
594: }
595: return $currentstring;
596: }
597:
598: # \begin{center} causes a new paragprah spacing that looks odd inside
599: # of a table cell
600: sub center_correction { return '\vspace*{-6 mm}'; }
601: #-- <center> tag (end tag required)
602: sub start_center {
603: my ($target,$token,$tagstack) = @_;
604: my $currentstring = &end_p(); # Close off any prior para.
605: if ($target eq 'web' || $target eq 'webgrade') {
606: $currentstring .= $token->[4];
607: } elsif ($target eq 'tex') {
608: if (&is_inside_of($tagstack, "table")) {
609: $currentstring .= ¢er_correction();
610: }
611: $currentstring .= '\begin{center}';
612: }
613: return $currentstring;
614: }
615:
616: sub end_center {
617: my ($target,$token,$tagstack) = @_;
618: my $currentstring = '';
619: if ($target eq 'web' || $target eq 'webgrade') {
620: $currentstring = $token->[2];
621: } elsif ($target eq 'tex') {
622: $currentstring = '\end{center}';
623: if (&is_inside_of($tagstack, "table")) {
624: #$currentstring .= ¢er_correction();
625: }
626: }
627: return $currentstring;
628: }
629:
630: #-- <b> tag (end tag required)
631: # NOTE: In TeX mode disables internal <p>
632: sub start_b {
633: my ($target,$token) = @_;
634: my $currentstring = '';
635: if ($target eq 'web' || $target eq 'webgrade') {
636: $currentstring = $token->[4];
637: } elsif ($target eq 'tex') {
638: &disable_para();
639: $currentstring .= '\textbf{';
640: }
641: return $currentstring;
642: }
643:
644: sub end_b {
645: my ($target,$token) = @_;
646: my $currentstring = '';
647: if ($target eq 'web' || $target eq 'webgrade') {
648: $currentstring = $token->[2];
649: } elsif ($target eq 'tex') {
650: &enable_para();
651: $currentstring = '}';
652: }
653: return $currentstring;
654: }
655:
656: #-- <strong> tag (end tag required)
657: # NOTE: in TeX mode disables internal <p>
658: sub start_strong {
659: my ($target,$token) = @_;
660: my $currentstring = '';
661: if ($target eq 'web' || $target eq 'webgrade') {
662: $currentstring = $token->[4];
663: } elsif ($target eq 'tex') {
664: &disable_para();
665: $currentstring = '\textbf{';
666: }
667: return $currentstring;
668: }
669:
670: sub end_strong {
671: my ($target,$token) = @_;
672: my $currentstring = '';
673: if ($target eq 'web' || $target eq 'webgrade') {
674: $currentstring = $token->[2];
675: } elsif ($target eq 'tex') {
676: &enable_para();
677: $currentstring = '}';
678: }
679: return $currentstring;
680: }
681:
682: #-- <h1> tag (end tag required)
683: sub start_h1 {
684: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
685: my $currentstring = &end_p(); # Close off any prior para.
686: if ($target eq 'web' || $target eq 'webgrade') {
687: $currentstring .= $token->[4];
688: } elsif ($target eq 'tex') {
689: my $pre;
690: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
691: if ($align eq 'center') {
692: $pre='\begin{center}';
693: } elsif ($align eq 'left') {
694: $pre='\rlap{';
695: } elsif ($align eq 'right') {
696: $pre=' \hfill \llap{';
697: }
698: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
699: if (not defined $TeXsize) {$TeXsize="large";}
700: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
701: } elsif ($target eq 'meta') {
702: $currentstring.='<subject>';
703: &start_output($target);
704: }
705: return $currentstring;
706: }
707:
708: sub end_h1 {
709: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
710: my $currentstring = '';
711: if ($target eq 'web' || $target eq 'webgrade') {
712: $currentstring .= $token->[2];
713: } elsif ($target eq 'tex') {
714: my $post='\vskip 0 mm ';
715: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
716: if ($align eq 'center') {
717: $post='\end{center}';
718: } elsif ($align eq 'left') {
719: $post='} \hfill'.'\vskip 0 mm ';
720: } elsif ($align eq 'right') {
721: $post='}'.'\vskip 0 mm ';
722: }
723: $currentstring .= '}}'.$post;
724: } elsif ($target eq 'meta') {
725: &end_output($target);
726: $currentstring='</subject>';
727: }
728: return $currentstring;
729: }
730:
731: #-- <h2> tag
732: sub start_h2 {
733: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
734: my $currentstring = &end_p(); # Close off any prior para.
735: if ($target eq 'web' || $target eq 'webgrade') {
736: $currentstring .= $token->[4];
737: } elsif ($target eq 'tex') {
738: my $pre;
739: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
740: if ($align eq 'center') {
741: $pre='\begin{center}';
742: } elsif ($align eq 'left') {
743: $pre='\rlap{';
744: } elsif ($align eq 'right') {
745: $pre=' \hfill \llap{';
746: }
747: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
748: if (not defined $TeXsize) {$TeXsize="large";}
749: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
750: }
751: return $currentstring;
752: }
753:
754: sub end_h2 {
755: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
756: my $currentstring = '';
757: if ($target eq 'web' || $target eq 'webgrade') {
758: $currentstring .= $token->[2];
759: } elsif ($target eq 'tex') {
760: my $post='\vskip 0 mm ';
761: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
762: if ($align eq 'center') {
763: $post='\end{center}';
764: } elsif ($align eq 'left') {
765: $post='} \hfill'.'\vskip 0 mm ';
766: } elsif ($align eq 'right') {
767: $post='}'.'\vskip 0 mm ';
768: }
769: $currentstring .= '}}'.$post;
770: }
771: return $currentstring;
772: }
773:
774: #-- <h3> tag
775: sub start_h3 {
776: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
777: my $currentstring = &end_p(); # Close off any prior para.
778: if ($target eq 'web' || $target eq 'webgrade') {
779: $currentstring .= $token->[4];
780: } elsif ($target eq 'tex') {
781: my $pre;
782: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
783: if ($align eq 'center') {
784: $pre='\begin{center}';
785: } elsif ($align eq 'left') {
786: $pre='\rlap{';
787: } elsif ($align eq 'right') {
788: $pre=' \hfill \llap{';
789: }
790: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
791: if (not defined $TeXsize) {$TeXsize="large";}
792: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
793: }
794: return $currentstring;
795: }
796:
797: sub end_h3 {
798: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
799: my $currentstring = '';
800: if ($target eq 'web' || $target eq 'webgrade') {
801: $currentstring .= $token->[2];
802: } elsif ($target eq 'tex') {
803: my $post='\vskip 0 mm ';
804: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
805: if ($align eq 'center') {
806: $post='\end{center}';
807: } elsif ($align eq 'left') {
808: $post='} \hfill'.'\vskip 0 mm ';
809: } elsif ($align eq 'right') {
810: $post='}'.'\vskip 0 mm ';
811: }
812: $currentstring .= '}}'.$post;
813: }
814: return $currentstring;
815: }
816:
817: #-- <h4> tag
818: sub start_h4 {
819: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
820: my $currentstring = &end_p(); # Close off any prior para.
821: if ($target eq 'web' || $target eq 'webgrade') {
822: $currentstring .= $token->[4];
823: } elsif ($target eq 'tex') {
824: my $pre;
825: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
826: if ($align eq 'center') {
827: $pre='\begin{center}';
828: } elsif ($align eq 'left') {
829: $pre='\rlap{';
830: } elsif ($align eq 'right') {
831: $pre=' \hfill \llap{';
832: }
833: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
834: if (not defined $TeXsize) {$TeXsize="large";}
835: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
836: }
837: return $currentstring;
838: }
839:
840: sub end_h4 {
841: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
842: my $currentstring = '';
843: if ($target eq 'web' || $target eq 'webgrade') {
844: $currentstring .= $token->[2];
845: } elsif ($target eq 'tex') {
846: my $post='\vskip 0 mm ';
847: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
848: if ($align eq 'center') {
849: $post='\end{center}';
850: } elsif ($align eq 'left') {
851: $post='} \hfill'.'\vskip 0 mm ';
852: } elsif ($align eq 'right') {
853: $post='}'.'\vskip 0 mm ';
854: }
855: $currentstring .= '}}'.$post;
856: }
857: return $currentstring;
858: }
859:
860: #-- <h5> tag
861: sub start_h5 {
862: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
863: my $currentstring = &end_p(); # Close off any prior paras.
864: if ($target eq 'web' || $target eq 'webgrade') {
865: $currentstring .= $token->[4];
866: } elsif ($target eq 'tex') {
867: my $pre;
868: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
869: if ($align eq 'center') {
870: $pre='\begin{center}';
871: } elsif ($align eq 'left') {
872: $pre='\rlap{';
873: } elsif ($align eq 'right') {
874: $pre=' \hfill \llap{';
875: }
876: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
877: if (not defined $TeXsize) {$TeXsize="large";}
878: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
879: }
880: return $currentstring;
881: }
882:
883: sub end_h5 {
884: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
885: my $currentstring = '';
886: if ($target eq 'web' || $target eq 'webgrade') {
887: $currentstring .= $token->[2];
888: } elsif ($target eq 'tex') {
889: my $post='\vskip 0 mm ';
890: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
891: if ($align eq 'center') {
892: $post='\end{center}';
893: } elsif ($align eq 'left') {
894: $post='} \hfill'.'\vskip 0 mm ';
895: } elsif ($align eq 'right') {
896: $post='}'.'\vskip 0 mm ';
897: }
898: $currentstring .= '}}'.$post;
899: }
900: return $currentstring;
901: }
902:
903: #-- <h6> tag
904: sub start_h6 {
905: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
906: my $currentstring = &end_p(); # Close off any prior paras.
907: if ($target eq 'web' || $target eq 'webgrade') {
908: $currentstring .= $token->[4];
909: } elsif ($target eq 'tex') {
910: my $pre;
911: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
912: if ($align eq 'center') {
913: $pre='\begin{center}';
914: } elsif ($align eq 'left') {
915: $pre='\rlap{';
916: } elsif ($align eq 'right') {
917: $pre=' \hfill \llap{';
918: }
919: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
920: if (not defined $TeXsize) {$TeXsize="large";}
921: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
922: }
923: return $currentstring;
924: }
925:
926: sub end_h6 {
927: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
928: my $currentstring = '';
929: if ($target eq 'web' || $target eq 'webgrade') {
930: $currentstring .= $token->[2];
931: } elsif ($target eq 'tex') {
932: my $post='\vskip 0 mm ';
933: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
934: if ($align eq 'center') {
935: $post='\end{center}';
936: } elsif ($align eq 'left') {
937: $post='} \hfill'.'\vskip 0 mm ';
938: } elsif ($align eq 'right') {
939: $post='}'.'\vskip 0 mm ';
940: }
941: $currentstring .= '}}'.$post;
942: }
943: return $currentstring;
944: }
945:
946: #--- <cite> tag (end tag required)
947: sub start_cite {
948: my ($target,$token) = @_;
949: my $currentstring = '';
950: if ($target eq 'web' || $target eq 'webgrade') {
951: $currentstring .= $token->[4];
952: } elsif ($target eq 'tex') {
953: $currentstring .= '\textit{';
954: }
955: return $currentstring;
956: }
957:
958: sub end_cite {
959: my ($target,$token) = @_;
960: my $currentstring = '';
961: if ($target eq 'web' || $target eq 'webgrade') {
962: $currentstring .= $token->[2];
963: } elsif ($target eq 'tex') {
964: $currentstring .= '}';
965: }
966: return $currentstring;
967: }
968:
969: #-- <i> tag (end tag required)
970: sub start_i {
971: my ($target,$token) = @_;
972: my $currentstring = '';
973: if ($target eq 'web' || $target eq 'webgrade') {
974: $currentstring .= $token->[4];
975: } elsif ($target eq 'tex') {
976: $currentstring .= '\textit{';
977: }
978: return $currentstring;
979: }
980:
981: sub end_i {
982: my ($target,$token) = @_;
983: my $currentstring = '';
984: if ($target eq 'web' || $target eq 'webgrade') {
985: $currentstring .= $token->[2];
986: } elsif ($target eq 'tex') {
987: $currentstring .= '}';
988: }
989: return $currentstring;
990: }
991:
992: #-- <address> tag (end tag required)
993: sub start_address {
994: my ($target,$token) = @_;
995: my $currentstring = '';
996: if ($target eq 'web' || $target eq 'webgrade') {
997: $currentstring .= $token->[4];
998: } elsif ($target eq 'tex') {
999: $currentstring .= '\textit{';
1000: }
1001: return $currentstring;
1002: }
1003:
1004: sub end_address {
1005: my ($target,$token) = @_;
1006: my $currentstring = '';
1007: if ($target eq 'web' || $target eq 'webgrade') {
1008: $currentstring .= $token->[2];
1009: } elsif ($target eq 'tex') {
1010: $currentstring .= '}';
1011: }
1012: return $currentstring;
1013: }
1014:
1015: #-- <dfn> tag (end tag required)
1016: sub start_dfn {
1017: my ($target,$token) = @_;
1018: my $currentstring = '';
1019: if ($target eq 'web' || $target eq 'webgrade') {
1020: $currentstring .= $token->[4];
1021: } elsif ($target eq 'tex') {
1022: $currentstring .= '\textit{';
1023: }
1024: return $currentstring;
1025: }
1026:
1027: sub end_dfn {
1028: my ($target,$token) = @_;
1029: my $currentstring = '';
1030: if ($target eq 'web' || $target eq 'webgrade') {
1031: $currentstring .= $token->[2];
1032: } elsif ($target eq 'tex') {
1033: $currentstring .= '}';
1034: }
1035: return $currentstring;
1036: }
1037:
1038: #-- <tt> tag (end tag required)
1039: sub start_tt {
1040: my ($target,$token) = @_;
1041: my $currentstring = '';
1042: if ($target eq 'web' || $target eq 'webgrade') {
1043: $currentstring .= $token->[4];
1044: } elsif ($target eq 'tex') {
1045: $currentstring .= '\texttt{';
1046: }
1047: return $currentstring;
1048: }
1049:
1050: sub end_tt {
1051: my ($target,$token) = @_;
1052: my $currentstring = '';
1053: if ($target eq 'web' || $target eq 'webgrade') {
1054: $currentstring .= $token->[2];
1055: } elsif ($target eq 'tex') {
1056: $currentstring .= '}';
1057: }
1058: return $currentstring;
1059: }
1060:
1061: #-- <kbd> tag (end tag required)
1062: sub start_kbd {
1063: my ($target,$token) = @_;
1064: my $currentstring = '';
1065: if ($target eq 'web' || $target eq 'webgrade') {
1066: $currentstring .= $token->[4];
1067: } elsif ($target eq 'tex') {
1068: $currentstring .= '\texttt{';
1069: }
1070: return $currentstring;
1071: }
1072:
1073: sub end_kbd {
1074: my ($target,$token) = @_;
1075: my $currentstring = '';
1076: if ($target eq 'web' || $target eq 'webgrade') {
1077: $currentstring .= $token->[2];
1078: } elsif ($target eq 'tex') {
1079: $currentstring .= '}';
1080: }
1081: return $currentstring;
1082: }
1083:
1084: #-- <code> tag (end tag required)
1085: sub start_code {
1086: my ($target,$token) = @_;
1087: my $currentstring = '';
1088: if ($target eq 'web' || $target eq 'webgrade') {
1089: $currentstring .= $token->[4];
1090: } elsif ($target eq 'tex') {
1091: $currentstring .= '\texttt{';
1092: }
1093: return $currentstring;
1094: }
1095:
1096: sub end_code {
1097: my ($target,$token) = @_;
1098: my $currentstring = '';
1099: if ($target eq 'web' || $target eq 'webgrade') {
1100: $currentstring .= $token->[2];
1101: } elsif ($target eq 'tex') {
1102: $currentstring .= '}';
1103: }
1104: return $currentstring;
1105: }
1106:
1107: #-- <em> tag (end tag required)
1108: sub start_em {
1109: my ($target,$token) = @_;
1110: my $currentstring = '';
1111: if ($target eq 'web' || $target eq 'webgrade') {
1112: $currentstring .= $token->[4];
1113: } elsif ($target eq 'tex') {
1114: $currentstring .= '\emph{';
1115: }
1116: return $currentstring;
1117: }
1118:
1119: sub end_em {
1120: my ($target,$token) = @_;
1121: my $currentstring = '';
1122: if ($target eq 'web' || $target eq 'webgrade') {
1123: $currentstring .= $token->[2];
1124: } elsif ($target eq 'tex') {
1125: $currentstring .= '}';
1126: }
1127: return $currentstring;
1128: }
1129:
1130: #-- <q> tag (end tag required)
1131: sub start_q {
1132: my ($target,$token) = @_;
1133: my $currentstring = '';
1134: if ($target eq 'web' || $target eq 'webgrade') {
1135: $currentstring .= $token->[4];
1136: } elsif ($target eq 'tex') {
1137: $currentstring .= '\emph{';
1138: }
1139: return $currentstring;
1140: }
1141:
1142: sub end_q {
1143: my ($target,$token) = @_;
1144: my $currentstring = '';
1145: if ($target eq 'web' || $target eq 'webgrade') {
1146: $currentstring .= $token->[2];
1147: } elsif ($target eq 'tex') {
1148: $currentstring .= '}';
1149: }
1150: return $currentstring;
1151: }
1152:
1153: # <p> is a bit strange since it does not require a closing </p>
1154: # However in latex, we must often output closing stuff to end
1155: # environments and {}'s etc. Therefore we do all the work
1156: # of figuring out the ending strings in the start tag processing,
1157: # and provide a mechanism to output the stop text external
1158: # to tag processing.
1159: #
1160: {
1161:
1162: my $closing_string = ''; # String required to close <p>
1163:
1164: # Some tags are <p> fragile meaning that <p> inside of them
1165: # does not work within TeX mode. This is managed via the
1166: # counter below:
1167: #
1168:
1169: my $para_disabled = 0;
1170:
1171: sub disable_para {
1172: $para_disabled++;
1173: }
1174: sub enable_para {
1175: $para_disabled--;
1176: }
1177:
1178:
1179: #-- <p> tag (end tag optional)
1180: #optional attribute - align="center|left|right"
1181: sub start_p {
1182: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1183: my $currentstring = '';
1184: if ($target eq 'web' || $target eq 'webgrade') {
1185: $currentstring .= &end_p(); # close off prior para if in progress.
1186: $currentstring .= $token->[4];
1187: if (! ($currentstring =~ /\//)) {
1188: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1189: }
1190: } elsif ($target eq 'tex' && !$para_disabled) {
1191: $currentstring .= &end_p(); # close off prior para if in progress.
1192: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1193: if ($align eq 'center') {
1194: $currentstring .='\begin{center}\par';
1195: $closing_string = '\end{center}';
1196: if (&is_inside_of($tagstack, "table")) {
1197: $currentstring = ¢er_correction().$currentstring;
1198: #$closing_string .= ¢er_correction();
1199: }
1200: } elsif ($align eq 'right') {
1201: $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1202: $closing_string= '}}';
1203: } elsif ($align eq 'left') {
1204: $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
1205: $closing_string = '}\hfill}';
1206: } else {
1207: $currentstring.='\par ';
1208: $closing_string = '\strut\\\\\strut ';
1209: }
1210:
1211: }
1212: return $currentstring;
1213: }
1214: #
1215: # End paragraph processing just requires that we output the
1216: # closing string that was saved and blank it.
1217: sub end_p {
1218: # Note only 'tex' mode uses disable_para and enable_para
1219: # so we don't need to know the target in the check below:
1220:
1221: if (!$para_disabled) {
1222: my $current_string = $closing_string;
1223: $closing_string = ''; # Not in a para anymore.
1224: return $current_string;
1225: } else {
1226: return '';
1227: }
1228:
1229: }
1230: }
1231: #-- <br> tag (end tag forbidden)
1232: sub start_br {
1233: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1234: my $currentstring = '';
1235: if ($target eq 'web' || $target eq 'webgrade') {
1236: $currentstring .= $token->[4];
1237: } elsif ($target eq 'tex') {
1238: my @tempo=@$tagstack;
1239: my $signal=0;
1240: # Not going to factor this to is_inside_of since that would require
1241: # multiple stack traversals.
1242: #
1243: for (my $i=$#tempo;$i>=0;$i--) {
1244: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1245: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1246: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1247: $signal=1;
1248: last;
1249: }
1250: }
1251: if ($signal) {
1252: $currentstring .= ' \vskip 0 mm ';
1253: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1254: $currentstring .= '\strut \\\\ \strut ';
1255: }
1256: }
1257: return $currentstring;
1258: }
1259:
1260: sub end_br {
1261: my ($target,$token) = @_;
1262: my $currentstring = '';
1263: if ($target eq 'web' || $target eq 'webgrade') {
1264: $currentstring .= $token->[2];
1265: }
1266: return $currentstring;
1267: }
1268:
1269: #-- <big> tag (end tag required)
1270: sub start_big {
1271: my ($target,$token) = @_;
1272: my $currentstring = '';
1273: if ($target eq 'web' || $target eq 'webgrade') {
1274: $currentstring .= $token->[4];
1275: } elsif ($target eq 'tex') {
1276: $currentstring .= '{\large ';
1277: }
1278: return $currentstring;
1279: }
1280:
1281: sub end_big {
1282: my ($target,$token) = @_;
1283: my $currentstring = '';
1284: if ($target eq 'web' || $target eq 'webgrade') {
1285: $currentstring .= $token->[2];
1286: } elsif ($target eq 'tex') {
1287: $currentstring .= '}';
1288: }
1289: return $currentstring;
1290: }
1291:
1292: #-- <small> tag (end tag required)
1293: sub start_small {
1294: my ($target,$token) = @_;
1295: my $currentstring = '';
1296: if ($target eq 'web' || $target eq 'webgrade') {
1297: $currentstring .= $token->[4];
1298: } elsif ($target eq 'tex') {
1299: $currentstring .= '{\footnotesize ';
1300: }
1301: return $currentstring;
1302: }
1303:
1304: sub end_small {
1305: my ($target,$token) = @_;
1306: my $currentstring = '';
1307: if ($target eq 'web' || $target eq 'webgrade') {
1308: $currentstring .= $token->[2];
1309: } elsif ($target eq 'tex') {
1310: $currentstring .= '}';
1311: }
1312: return $currentstring;
1313: }
1314:
1315: #-- <basefont> tag (end tag forbidden)
1316: sub start_basefont {
1317: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1318: my $currentstring = '';
1319: if ($target eq 'web' || $target eq 'webgrade') {
1320: $currentstring = $token->[4];
1321: } elsif ($target eq 'tex') {
1322: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1323: if (defined $basesize) {
1324: $currentstring = '{\\'.$basesize.' ';
1325: }
1326: }
1327: return $currentstring;
1328: }
1329:
1330: sub end_basefont {
1331: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1332: my $currentstring = '';
1333: if ($target eq 'web' || $target eq 'webgrade') {
1334: $currentstring = $token->[4];
1335: } elsif ($target eq 'tex') {
1336: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1337: if (defined $basesize) {
1338: $currentstring = '}';
1339: }
1340: }
1341: return $currentstring;
1342: }
1343:
1344: #-- <font> tag (end tag required)
1345: sub start_font {
1346: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1347: my $currentstring = '';
1348: if ($target eq 'web' || $target eq 'webgrade') {
1349: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1350: if ($face!~/symbol/i) {
1351: if (($env{'browser.fontenhance'} eq 'on') ||
1352: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1353: }
1354: $currentstring = $token->[4];
1355: } elsif ($target eq 'tex') {
1356: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1357: if (defined $fontsize) {
1358: $currentstring = '{\\'.$fontsize.' ';
1359: }
1360: }
1361: return $currentstring;
1362: }
1363:
1364: sub end_font {
1365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1366: my $currentstring = '';
1367: if ($target eq 'web' || $target eq 'webgrade') {
1368: $currentstring = $token->[2];
1369: } elsif ($target eq 'tex') {
1370: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1371: if (defined $fontsize) {
1372: $currentstring = '}';
1373: }
1374: }
1375: return $currentstring;
1376: }
1377:
1378: #-- <strike> tag (end tag required)
1379: sub start_strike {
1380: my ($target,$token) = @_;
1381: my $currentstring = '';
1382: if ($target eq 'web' || $target eq 'webgrade') {
1383: $currentstring .= $token->[4];
1384: } elsif ($target eq 'tex') {
1385: &Apache::lonxml::startredirection();
1386: }
1387: return $currentstring;
1388: }
1389:
1390: sub end_strike {
1391: my ($target,$token) = @_;
1392: my $currentstring = '';
1393: if ($target eq 'web' || $target eq 'webgrade') {
1394: $currentstring .= $token->[2];
1395: } elsif ($target eq 'tex') {
1396: $currentstring=&Apache::lonxml::endredirection();
1397: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1398: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1399: $currentstring=~s/(\S)\s*$/$1\}/;
1400: }
1401: return $currentstring;
1402: }
1403:
1404: #-- <s> tag (end tag required)
1405: sub start_s {
1406: my ($target,$token) = @_;
1407: my $currentstring = '';
1408: if ($target eq 'web' || $target eq 'webgrade') {
1409: $currentstring .= $token->[4];
1410: } elsif ($target eq 'tex') {
1411: &Apache::lonxml::startredirection();
1412: }
1413: return $currentstring;
1414: }
1415:
1416: sub end_s {
1417: my ($target,$token) = @_;
1418: my $currentstring = '';
1419: if ($target eq 'web' || $target eq 'webgrade') {
1420: $currentstring .= $token->[2];
1421: } elsif ($target eq 'tex') {
1422: $currentstring=&Apache::lonxml::endredirection();
1423: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1424: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1425: $currentstring=~s/(\S)\s*$/$1\}/;
1426: }
1427: return $currentstring;
1428: }
1429:
1430: #-- <sub> tag (end tag required)
1431: sub start_sub {
1432: my ($target,$token) = @_;
1433: my $currentstring = '';
1434: if ($target eq 'web' || $target eq 'webgrade') {
1435: $currentstring .= $token->[4];
1436: } elsif ($target eq 'tex') {
1437: $currentstring .= '\ensuremath{_{';
1438: }
1439: return $currentstring;
1440: }
1441:
1442: sub end_sub {
1443: my ($target,$token) = @_;
1444: my $currentstring = '';
1445: if ($target eq 'web' || $target eq 'webgrade') {
1446: $currentstring .= $token->[2];
1447: } elsif ($target eq 'tex') {
1448: $currentstring .= '}}';
1449: }
1450: return $currentstring;
1451: }
1452:
1453: #-- <sup> tag (end tag required)
1454: sub start_sup {
1455: my ($target,$token) = @_;
1456: my $currentstring = '';
1457: if ($target eq 'web' || $target eq 'webgrade') {
1458: $currentstring .= $token->[4];
1459: } elsif ($target eq 'tex') {
1460: $currentstring .= '\ensuremath{^{';
1461: }
1462: return $currentstring;
1463: }
1464:
1465: sub end_sup {
1466: my ($target,$token) = @_;
1467: my $currentstring = '';
1468: if ($target eq 'web' || $target eq 'webgrade') {
1469: $currentstring .= $token->[2];
1470: } elsif ($target eq 'tex') {
1471: $currentstring .= '}}';
1472: }
1473: return $currentstring;
1474: }
1475:
1476: #-- <hr> tag (end tag forbidden)
1477: sub start_hr {
1478: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1479: my $currentstring = &end_p(); # End enclosing para.
1480: if ($target eq 'web' || $target eq 'webgrade') {
1481: $currentstring .= $token->[4];
1482: } elsif ($target eq 'tex') {
1483: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1484: if (defined $LaTeXwidth) {
1485: if ($LaTeXwidth=~/^%/) {
1486: substr($LaTeXwidth,0,1)='';
1487: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1488: }
1489: } else {
1490: $LaTeXwidth ='0.9\textwidth';
1491: }
1492: my ($pre,$post);
1493: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1494: if (($align eq 'center') || (not defined $align)) {
1495: $pre=''; $post='';
1496: } elsif ($align eq 'left') {
1497: $pre='\rlap{'; $post='} \hfill';
1498: } elsif ($align eq 'right') {
1499: $pre=' \hfill \llap{'; $post='}';
1500: }
1501: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1502: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1503: }
1504: return $currentstring;
1505: }
1506:
1507: sub end_hr {
1508: my ($target,$token) = @_;
1509: my $currentstring = '';
1510: if ($target eq 'web' || $target eq 'webgrade') {
1511: $currentstring .= $token->[2];
1512: }
1513: return $currentstring;
1514: }
1515:
1516: #-- <div> tag (end tag required)
1517: {
1518:
1519: # Since div can be nested, the stack below is used
1520: # in 'tex' mode to store the ending strings
1521: # for the div stack.
1522:
1523: my @div_end_stack;
1524:
1525: sub start_div {
1526: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1527: my $currentstring = &end_p(); # Close enclosing para.
1528: if ($target eq 'web' || $target eq 'webgrade') {
1529: $currentstring .= $token->[4];
1530: }
1531: if ($target eq 'tex') {
1532: # 4 possible alignments: left, right, center, and -missing-.
1533:
1534: my $endstring = '';
1535:
1536: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1537: $safeeval, undef, 1));
1538: if ($align eq 'center') {
1539: $currentstring .= '\begin{center}';
1540: $endstring = '\end{center}';
1541: if (&is_inside_of($tagstack, "table")) {
1542: $currentstring = ¢er_correction().$currentstring;
1543: #$endstring .= ¢er_correction();
1544: }
1545: }
1546: elsif ($align eq 'right') {
1547: $currentstring .= '\begin{flushright}';
1548: $endstring .= '\end{flushright}';
1549: } elsif ($align eq 'left') {
1550: $currentstring .= '\begin{flushleft}';
1551: $endstring = '\end{flushleft}';
1552: } else {
1553:
1554: }
1555: $currentstring .= "\n"; # For human readability.
1556: $endstring = "\n$endstring\n"; # For human readability
1557: push(@div_end_stack, $endstring);
1558: }
1559: return $currentstring;
1560: }
1561:
1562: sub end_div {
1563: my ($target,$token) = @_;
1564: my $currentstring = '';
1565: if ($target eq 'web' || $target eq 'webgrade') {
1566: $currentstring .= $token->[2];
1567: }
1568: if ($target eq 'tex') {
1569: my $endstring = pop @div_end_stack;
1570: $currentstring .= $endstring;
1571: }
1572: return $currentstring;
1573: }
1574: }
1575:
1576: #-- <a> tag (end tag required)
1577: sub start_a {
1578: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1579: my $currentstring = '';
1580: if ($target eq 'web' || $target eq 'webgrade') {
1581: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1582: undef,1);
1583: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1584: } elsif ($target eq 'tex') {
1585: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1586: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1587: if ($a=~/\S/) {
1588: $a=~s/([^\\])%/$1\\\%/g;
1589: $currentstring .= '\ref{URI: '.$a.'}';
1590: } elsif ($b=~/\S/) {
1591: $currentstring .= '\ref{Anchor: '.$b.'}';
1592: } else {
1593: $currentstring.='';
1594: }
1595: }
1596: return $currentstring;
1597: }
1598:
1599: sub end_a {
1600: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1601: my $currentstring = '';
1602: if ($target eq 'web' || $target eq 'webgrade') {
1603: $currentstring .= $token->[2];
1604: }
1605: return $currentstring;
1606: }
1607:
1608: #-- <li> tag (end tag optional)
1609: sub start_li {
1610: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1611: my $currentstring = '';
1612: if ($target eq 'web' || $target eq 'webgrade') {
1613: $currentstring = $token->[4];
1614: } elsif ($target eq 'tex') {
1615: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1616: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1617: #FIXME need to support types i and I
1618: if ($type=~/disc/) {
1619: $currentstring .= ' \item[$\bullet$] ';
1620: } elsif ($type=~/circle/) {
1621: $currentstring .= ' \item[$\circ$] ';
1622: } elsif ($type=~/square/) {
1623: $currentstring .= ' \item[$\diamond$] ';
1624: } elsif ($type eq '1') {
1625: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1626: } elsif ($type eq 'A') {
1627: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1628: } elsif ($type eq 'a') {
1629: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1630: } elsif ($value ne '') {
1631: $currentstring .= ' \item['.$value.'] ';
1632: } else {
1633: $currentstring .= ' \item ';
1634: }
1635: $Apache::londefdef::list_index++;
1636: }
1637: return $currentstring;
1638: }
1639:
1640: sub end_li {
1641: my ($target,$token) = @_;
1642: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1643: if ($target eq 'web' || $target eq 'webgrade') {
1644: $currentstring .= $token->[2];
1645: }
1646: return $currentstring;
1647: }
1648:
1649: #-- <u> tag (end tag required)
1650: sub start_u {
1651: my ($target,$token) = @_;
1652: my $currentstring = '';
1653: if ($target eq 'web' || $target eq 'webgrade') {
1654: $currentstring .= $token->[4];
1655: } elsif ($target eq 'tex') {
1656: &Apache::lonxml::startredirection();
1657: }
1658: return $currentstring;
1659: }
1660:
1661: sub end_u {
1662: my ($target,$token) = @_;
1663: my $currentstring = '';
1664: if ($target eq 'web' || $target eq 'webgrade') {
1665: $currentstring .= $token->[2];
1666: } elsif ($target eq 'tex') {
1667: $currentstring=&Apache::lonxml::endredirection();
1668: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1669: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1670: $currentstring=~s/(\S)\s*$/$1\}/;
1671: }
1672: return $currentstring;
1673: }
1674:
1675: #-- <ul> tag (end tag required)
1676: sub start_ul {
1677: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1678: my $currentstring = &end_p(); # Close off enclosing list.
1679: if ($target eq 'web' || $target eq 'webgrade') {
1680: $currentstring .= $token->[4];
1681: } elsif ($target eq 'tex') {
1682: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1683: $Apache::londefdef::list_index=0;
1684: if ($TeXtype eq 'disc') {
1685: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1686: '\renewcommand{\labelitemii}{$\bullet$}'.
1687: '\renewcommand{\labelitemiii}{$\bullet$}'.
1688: '\renewcommand{\labelitemiv}{$\bullet$}';
1689: } elsif ($TeXtype eq 'circle') {
1690: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1691: '\renewcommand{\labelitemii}{$\circ$}'.
1692: '\renewcommand{\labelitemiii}{$\circ$}'.
1693: '\renewcommand{\labelitemiv}{$\circ$}';
1694: } elsif ($TeXtype eq 'square') {
1695: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1696: '\renewcommand{\labelitemii}{$\diamond$}'.
1697: '\renewcommand{\labelitemiii}{$\diamond$}'.
1698: '\renewcommand{\labelitemiv}{$\diamond$}';
1699: }
1700: $currentstring .= '\strut \begin{itemize}';
1701: }
1702: return $currentstring;
1703: }
1704:
1705: sub end_ul {
1706: my ($target,$token) = @_;
1707: my $currentstring = '';
1708: if ($target eq 'web' || $target eq 'webgrade') {
1709: $currentstring = $token->[2];
1710: } elsif ($target eq 'tex') {
1711: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1712: '\renewcommand{\labelitemii}{$\bullet$}'.
1713: '\renewcommand{\labelitemiii}{$\bullet$}'.
1714: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1715: }
1716: return $currentstring;
1717: }
1718:
1719: #-- <menu> tag (end tag required)
1720: sub start_menu {
1721: my ($target,$token) = @_;
1722: my $currentstring = '';
1723: if ($target eq 'web' || $target eq 'webgrade') {
1724: $currentstring = $token->[4];
1725: } elsif ($target eq 'tex') {
1726: $currentstring = " \\begin{itemize} ";
1727: }
1728: return $currentstring;
1729: }
1730:
1731: sub end_menu {
1732: my ($target,$token) = @_;
1733: my $currentstring = '';
1734: if ($target eq 'web' || $target eq 'webgrade') {
1735: $currentstring = $token->[2];
1736: } elsif ($target eq 'tex') {
1737: $currentstring = " \\end{itemize}";
1738: }
1739: return $currentstring;
1740: }
1741:
1742: #-- <dir> tag (end tag required)
1743: sub start_dir {
1744: my ($target,$token) = @_;
1745: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1746: if ($target eq 'web' || $target eq 'webgrade') {
1747: $currentstring .= $token->[4];
1748: } elsif ($target eq 'tex') {
1749: $currentstring .= " \\begin{itemize} ";
1750: }
1751: return $currentstring;
1752: }
1753:
1754: sub end_dir {
1755: my ($target,$token) = @_;
1756: my $currentstring = '';
1757: if ($target eq 'web' || $target eq 'webgrade') {
1758: $currentstring = $token->[2];
1759: } elsif ($target eq 'tex') {
1760: $currentstring = " \\end{itemize}";
1761: }
1762: return $currentstring;
1763: }
1764:
1765: #-- <ol> tag (end tag required)
1766: sub start_ol {
1767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1768: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1769: if ($target eq 'web' || $target eq 'webgrade') {
1770: $currentstring .= $token->[4];
1771: } elsif ($target eq 'tex') {
1772: $Apache::londefdef::list_index=0;
1773: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1774: if ($type eq '1') {
1775: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1776: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1777: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1778: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1779: } elsif ($type eq 'A') {
1780: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1781: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1782: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1783: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1784: } elsif ($type eq 'a') {
1785: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1786: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1787: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1788: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1789: } elsif ($type eq 'i') {
1790: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1791: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1792: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1793: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1794: } elsif ($type eq 'I') {
1795: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1796: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1797: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1798: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1799: }
1800: $currentstring .= '\strut \begin{enumerate}';
1801: }
1802: return $currentstring;
1803: }
1804:
1805: sub end_ol {
1806: my ($target,$token) = @_;
1807: my $currentstring = '';
1808: if ($target eq 'web' || $target eq 'webgrade') {
1809: $currentstring = $token->[2];
1810: } elsif ($target eq 'tex') {
1811: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1812: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1813: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1814: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1815: }
1816: return $currentstring;
1817: }
1818:
1819: #-- <dl> tag (end tag required)
1820: sub start_dl {
1821: my ($target,$token) = @_;
1822: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1823: if ($target eq 'web' || $target eq 'webgrade') {
1824: $currentstring .= $token->[4];
1825: } elsif ($target eq 'tex') {
1826: $currentstring .= '\begin{description}';
1827: $Apache::londefdef::DL++;
1828: push(@Apache::londefdef::description,[]);
1829: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1830: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1831: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1832: }
1833: return $currentstring;
1834: }
1835:
1836: sub end_dl {
1837: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1838: my $currentstring = '';
1839: if ($target eq 'web' || $target eq 'webgrade') {
1840: $currentstring = $token->[2];
1841: } elsif ($target eq 'tex') {
1842: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1843: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1844: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1845: $currentstring.=' '.$element.' ';
1846: }
1847: pop(@Apache::londefdef::description);
1848: $currentstring.='\end{description}';
1849: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1850: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1851: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1852: $Apache::londefdef::DL--;
1853: }
1854: return $currentstring;
1855: }
1856:
1857: #-- <dt> tag (end tag optional)
1858: sub start_dt {
1859: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1860: my $currentstring='';
1861: if ($target eq 'web' || $target eq 'webgrade') {
1862: $currentstring = $token->[4];
1863: } elsif ($target eq 'tex') {
1864: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1865: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1866: &Apache::lonxml::startredirection();
1867: $Apache::londefdef::DT[-1]++;
1868: $Apache::londefdef::seenDT[-1]=1;
1869: }
1870: return $currentstring;
1871: }
1872:
1873: sub end_dt {
1874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1875: my $currentstring = '';
1876: if ($target eq 'web' || $target eq 'webgrade') {
1877: $currentstring = $token->[2];
1878: } elsif ($target eq 'tex') {
1879: if ($Apache::londefdef::DT[-1]) {
1880: my $data=&item_cleanup();
1881: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1882: $Apache::londefdef::DT[-1]--;
1883: }
1884: }
1885: return $currentstring;
1886: }
1887:
1888: sub item_cleanup {
1889: my $item=&Apache::lonxml::endredirection();
1890: $item=~s/\\begin{center}//g;
1891: $item=~s/\\end{center}//g;
1892: return $item;
1893: }
1894:
1895: #-- <dd> tag (end tag optional)
1896: sub start_dd {
1897: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1898: my $currentstring = '';
1899: if ($target eq 'web' || $target eq 'webgrade') {
1900: $currentstring = $token->[4];
1901: } elsif ($target eq 'tex') {
1902: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1903: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1904: if (!$Apache::londefdef::seenDT[-1]) {
1905: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1906: }
1907: push(@{$Apache::londefdef::description[-1]},'');
1908: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1909: $Apache::londefdef::DD[-1]++;
1910: &Apache::lonxml::startredirection();
1911: }
1912: return $currentstring;
1913: }
1914:
1915: sub end_dd {
1916: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1917: my $currentstring = '';
1918: if ($target eq 'web' || $target eq 'webgrade') {
1919: $currentstring = $token->[2];
1920: } elsif ($target eq 'tex') {
1921: $Apache::londefdef::description[-1]->[-1].=
1922: &Apache::lonxml::endredirection().' \vskip 0mm ';
1923: $Apache::londefdef::DD[-1]--;
1924: }
1925: return $currentstring;
1926: }
1927:
1928: #-- <table> tag (end tag required)
1929: # <table> also ends any prior <p> that is not closed.
1930: # but, unless I allow <p>'s to nest, that's the
1931: # only way I could think of to allow <p> in
1932: # <tr> <th> bodies
1933: #
1934: #list of supported attributes: border,width,TeXwidth
1935: sub start_table {
1936: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1937: my $textwidth = '';
1938: my $currentstring = &end_p();
1939: if ($target eq 'web' || $target eq 'webgrade') {
1940: $currentstring .= $token->[4];
1941: } elsif ($target eq 'tex') {
1942: my $aa = {};
1943: push @Apache::londefdef::table, $aa;
1944: $Apache::londefdef::table[-1]{'row_number'} = -1;
1945: #maximum table's width (default coincides with text line length)
1946: if ($#Apache::londefdef::table==0) {
1947: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1948: $textwidth=~/(\d+\.?\d*)/;
1949: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1950: } else {
1951: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1952: #the maximum width of nested table is determined by LATeX width of parent cell
1953: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1954: } else {
1955: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1956: $textwidth=$Apache::londefdef::table[-2]{'width'};
1957: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1958: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1959: }
1960: }
1961: }
1962:
1963: # width either comes forced from the TeXwidth or the width parameters.
1964: # in either case it can be a percentage or absolute width.
1965: # in the width case we ignore absolute width
1966: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1967: if (!defined($TeXwidth)) {
1968: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1969: $safeeval,undef,1);
1970: if ($htmlwidth =~ /%/) {
1971: $TeXwidth = $htmlwidth;
1972: } else {
1973: $TeXwidth = $textwidth;
1974: }
1975: } else {
1976: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1977: }
1978: if ($TeXwidth=~/%/) {
1979: $Apache::londefdef::table[-1]{'percent'}=1;
1980: $TeXwidth=~/(\d+)/;
1981: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1982: } else {
1983: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1984: }
1985:
1986: #table's border
1987: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1988: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1989: unless (defined $border) { $border = 0; }
1990: if ($border) {
1991: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1992: $Apache::londefdef::table[-1]{'vinc'} = '&';
1993: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1994: } else {
1995: $Apache::londefdef::table[-1]{'hinc'} = '';
1996: $Apache::londefdef::table[-1]{'vinc'} = '&';
1997: $Apache::londefdef::table[-1]{'vvinc'} = '';
1998: }
1999: if ($#Apache::londefdef::table==0) {
2000: # Note that \newline seems to destroy the alignment envs.
2001: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2002: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2003: }
2004: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2005: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2006: $Apache::londefdef::table[-1]{'objectlen'}=[];
2007: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2008: $Apache::londefdef::table[-1]{'maxlen'}=[];
2009: $Apache::londefdef::table[-1]{'minlen'}=[];
2010: $Apache::londefdef::table[-1]{'content'}=[];
2011: $Apache::londefdef::table[-1]{'align'}=[];
2012: $currentstring.='\keephidden{NEW TABLE ENTRY}';
2013:
2014:
2015: }
2016: return $currentstring;
2017: }
2018:
2019: sub end_table {
2020: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2021: my $currentstring = '';
2022: if ($target eq 'web' || $target eq 'webgrade') {
2023: $currentstring = $token->[2];
2024: } elsif ($target eq 'tex') {
2025: my $inmemory = '';
2026: my $output = '';
2027: my $WARNING='';
2028: #width of columns from TeXwidth attributes
2029:
2030: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2031: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2032: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2033: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2034: }
2035: }
2036: }
2037: #free space and number of empty columns
2038: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2039: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2040: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2041: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2042: $empty_columns++;
2043: } else {
2044: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2045: }
2046: }
2047: #boundaries for contents columns
2048: my @min_len=();#columns can not be narrower
2049: my @max_len=();#maximum length of column
2050: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2051: my ($localmin,$localmax)=(0,0);
2052: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2053: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2054: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2055: }
2056: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2057: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2058: }
2059: }
2060: push @min_len, $localmin;
2061: push @max_len, $localmax;
2062: }
2063: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2064: my $localmin=0,;
2065: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2066: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2067: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2068: }
2069: }
2070: if ($max_len[$jn]<$localmin) {
2071: $max_len[$jn]=$localmin;
2072: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2073: }#object size is bigger
2074: if ($min_len[$jn]<$localmin) {
2075: $min_len[$jn]=$localmin;
2076: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2077: }#object size is bigger
2078: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2079: $min_len[$jn]=0;
2080: $max_len[$jn]=0;
2081: }
2082: }
2083: #final adjustment of column width
2084: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2085: my @adjust=();
2086: #step 1. adjustment by maximum value
2087: my $space_neeeded=0;
2088: for (my $jn=0;$jn<=$#max_len;$jn++) {
2089: $space_neeeded=$space_neeeded+$max_len[$jn];
2090: }
2091: if ($space_neeeded<=$available_space) {
2092: for (my $jn=0;$jn<=$#max_len;$jn++) {
2093: if ($fwidth[$jn]==0) {
2094: $fwidth[$jn]=$max_len[$jn];
2095: }
2096: }
2097: } else {
2098: #step 2. adjustment by minimum value (estimation)
2099: $space_neeeded=0;
2100: for (my $jn=0;$jn<=$#min_len;$jn++) {
2101: $space_neeeded+=$min_len[$jn];
2102: }
2103: if ($space_neeeded>$available_space) {
2104: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2105: for (my $jn=0;$jn<=$#max_len;$jn++) {
2106: if ($fwidth[$jn]==0) {
2107: $fwidth[$jn]=$min_len[$jn];
2108: }
2109: }
2110: #check if we have objects which can be scaled
2111: my $how_many_to_scale=0;
2112: my @to_scale=();
2113: for (my $jn=0;$jn<=$#max_len;$jn++) {
2114: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2115: $how_many_to_scale++;
2116: push @to_scale, $jn;
2117: }
2118: }
2119: if ($how_many_to_scale>0) {
2120: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2121: foreach my $jn (@to_scale) {
2122: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2123: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2124: if ($1 ne '') {
2125: my $current_length=&recalc($1);
2126: $current_length=~/(\d+\.?\d*)/;
2127: $current_length=$current_length-$space_to_adjust;
2128: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2129: }
2130: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2131: if ($1 ne '') {
2132: my $current_length=$1;
2133: $current_length=$current_length-$space_to_adjust;
2134: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2135: }
2136: }
2137: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2138: }
2139: }
2140: } else {
2141: #step 3. adjustment over minimal + corrections
2142: my $enlarge_coef=$available_space/$space_neeeded;
2143: my $acsessive=0;
2144: for (my $jn=0;$jn<=$#min_len;$jn++) {
2145: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2146: if ($adjust[$jn]>$max_len[$jn]) {
2147: $fwidth[$jn]=$max_len[$jn];
2148: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2149: $adjust[$jn]=0;
2150: }
2151: }
2152: if ($acsessive>0) {
2153: #we have an excess of space and can redistribute it
2154: my $notempty_columns=0;
2155: for (my $jn=0;$jn<=$#min_len;$jn++) {
2156: if ($adjust[$jn]!=0) {
2157: $notempty_columns++;
2158: }
2159: }
2160: my $per_column=$acsessive/$notempty_columns;
2161: for (my $jn=0;$jn<=$#min_len;$jn++) {
2162: if ($adjust[$jn]!=0) {
2163: $adjust[$jn]+=$per_column;
2164: $fwidth[$jn]=$adjust[$jn];
2165: }
2166: }
2167: } else {
2168: for (my $jn=0;$jn<=$#min_len;$jn++) {
2169: $fwidth[$jn]=$adjust[$jn];
2170: }
2171: }
2172: }
2173: }
2174: #use all available width if it is defined in % or as TeXwidth
2175: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2176: my $current=0;
2177: for (my $i=0;$i<=$#fwidth;$i++) {
2178: $current+=$fwidth[$i];
2179: }
2180: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2181: for (my $i=0;$i<=$#fwidth;$i++) {
2182: $fwidth[$i]*=$coef;
2183: }
2184: }
2185: #removing of empty columns if allowed
2186: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2187: if ($permission eq 'yes') {
2188: my @cleaned_table=();
2189: my @cleaned_header=();
2190: my $colind=0;
2191: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2192: if ($fwidth[$jn]!=0) {
2193: #we need to copy column
2194: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2195: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2196: $cleaned_header[$colind]=$fwidth[$jn];
2197: }
2198: $colind++;
2199: }
2200: }
2201: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2202: @fwidth=@cleaned_header;
2203: }
2204: #construct header of the table
2205: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2206: for (my $in=0;$in<=$#fwidth;$in++) {
2207: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2208: }
2209: $header_of_table .= '}';
2210: #fill the table
2211: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2212: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2213: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2214: $output.=¢er_correction().'\begin{center}';
2215: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2216: $output.=' \hfill \llap{'
2217: }
2218: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2219: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2220: $output.='\end{center}';#.¢er_correction();
2221: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2222: $output.='} ';
2223: }
2224: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2225: }
2226: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2227: }
2228: # Note that \newline destroys alignment env's produced by e.g. <div>
2229: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2230: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2231: if ($#Apache::londefdef::table > 0) {
2232: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2233: # Figure out max/and min width by summing us and then
2234: # apply that to the current column of the table we nest in
2235: # if it's larger than the current width or the current width
2236: # is undefined.
2237: #
2238: my $min_nested_width = 0;
2239: my $max_nested_width = 0;
2240: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2241: $min_nested_width += $min_len[$col];
2242: $max_nested_width += $max_len[$col];
2243:
2244: }
2245: # Fudge in an extra 5 mm for borders etc:
2246:
2247: $min_nested_width += 5;
2248: $max_nested_width += 5;
2249:
2250: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2251: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2252: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2253: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2254: }
2255: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2256: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2257: }
2258:
2259: pop @Apache::londefdef::table;
2260: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2261: } else {
2262: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2263: pop @Apache::londefdef::table;
2264: undef @Apache::londefdef::table;
2265: }
2266: }
2267: return $currentstring;
2268: }
2269:
2270: #-- <tr> tag (end tag optional)
2271: sub start_tr {
2272: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2273: my $currentstring = '';
2274: if ($target eq 'web' || $target eq 'webgrade') {
2275: $currentstring = $token->[4];
2276: } elsif ($target eq 'tex') {
2277: $Apache::londefdef::table[-1]{'row_number'}++;
2278: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2279: if ($alignchar ne '') {
2280: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2281: } else {
2282: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2283: }
2284: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2285: #
2286: # Need to save the number of table columns to preserve the max # columns.
2287: #
2288: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2289: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2290: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2291: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2292: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2293: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2294: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2295: }
2296: return $currentstring;
2297: }
2298:
2299: sub end_tr {
2300: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2301: my $currentstring = &end_p(); # Close any pending <p> in the row.
2302: if ($target eq 'web' || $target eq 'webgrade') {
2303: $currentstring .= $token->[2];
2304: } elsif ($target eq 'tex') {
2305: if ($Apache::londefdef::TD_redirection) {
2306: &end_td_tex($parstack,$parser,$safeeval);
2307: }
2308: # Counter columns must be the maximum number of columns seen
2309: # in the table so far so:
2310: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2311: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2312: }
2313:
2314:
2315:
2316: }
2317: return $currentstring;
2318: }
2319:
2320: #-- <td> tag (end tag optional)
2321: sub start_td {
2322: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2323: my $currentstring = '';
2324: if ($target eq 'web' || $target eq 'webgrade') {
2325: $currentstring = $token->[4];
2326: } elsif ($target eq 'tex') {
2327: $Apache::londefdef::TD_redirection = 1;
2328: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2329: }
2330: return $currentstring;
2331: }
2332:
2333: sub tag_check {
2334: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2335: my @ar=@$parstack;
2336: for (my $i=$#ar-1;$i>=0;$i--) {
2337: if (lc($$tagstack[$i]) eq $good_tag) {
2338: &start_td_tex($parstack,$parser,$safeeval);
2339: last;
2340: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2341: splice @ar, $i+1;
2342: &end_td_tex(\@ar,$parser,$safeeval);
2343: &start_td_tex($parstack,$parser,$safeeval);
2344: last;
2345: }
2346: }
2347: return '';
2348: }
2349:
2350: sub start_td_tex {
2351: my ($parstack,$parser,$safeeval) = @_;
2352: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2353: if ($alignchar eq '') {
2354: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2355: }
2356: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2357: $Apache::londefdef::table[-1]{'counter_columns'}++;
2358: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2359: if (defined $TeXwidth) {
2360: my $current_length=&recalc($TeXwidth);
2361: $current_length=~/(\d+\.?\d*)/;
2362: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2363: }
2364: &Apache::lonxml::startredirection();
2365: return '';
2366: }
2367:
2368: sub end_td_tex {
2369: my ($parstack,$parser,$safeeval) = @_;
2370: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2371: my $data=&Apache::lonxml::endredirection();
2372: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2373: if (defined $TeXwidth) {
2374: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2375: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2376: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2377: } else {
2378: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2379: my $garbage_data=$data;
2380: my $fwidth=0;
2381: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2382: my $current_length=&recalc($1);
2383: $current_length=~/(\d+\.?\d*)/;
2384: if ($fwidth<$1) {$fwidth=$1;}
2385: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2386: }
2387: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2388: my $current_length=$1;
2389: if ($fwidth<$current_length) {$fwidth=$current_length;}
2390: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2391: }
2392: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2393: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2394: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2395: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2396: } elsif ($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)*/) {
2397: my $garbage_data=$data;
2398: my $fwidth=0;
2399: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2400: my $current_length=&recalc($1);
2401: $current_length=~/(\d+\.?\d*)/;
2402: if ($fwidth<$1) {$fwidth=$1;}
2403: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2404: }
2405: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2406: my $current_length=&recalc($1);
2407: $current_length=~/(\d+\.?\d*)/;
2408: if ($fwidth<$1) {$fwidth=$1;}
2409: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2410: }
2411: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2412: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2413: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2414: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2415: $data=~s/\\\\\s*$//;
2416: } else {
2417: $data=~s/^\s+(\S.*)/$1/;
2418: $data=~s/(.*\S)\s+$/$1/;
2419: $data=~s/(\s)+/$1/;
2420: my ($current_length,$min_length)=(0,0);
2421: if ($data=~/\\vskip/) {
2422: my $newdata=$data;
2423: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2424: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2425: foreach my $elementdata (@newdata) {
2426: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2427: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2428: my @words=split(/ /,$elementdata);
2429: foreach my $word (@words) {
2430: my $lengthword=2.5*&LATEX_length($word);
2431: if ($min_length<$lengthword) {$min_length=$lengthword;}
2432: }
2433: }
2434: } else {
2435: $current_length=2.5*&LATEX_length($data);
2436: my @words=split(/ /,$data);
2437: foreach my $word (@words) {
2438: my $lengthword=2*&LATEX_length($word);
2439: if ($min_length<$lengthword) {$min_length=$lengthword;}
2440: }
2441: }
2442: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2443: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2444: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2445: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2446: }
2447: }
2448: # Substitute all of the tables nested in this cell in their appropriate places.
2449:
2450:
2451: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2452: for (my $in=0; $in<=$nested_count; $in++) {
2453: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2454: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2455: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2456: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2457:
2458: }
2459: # Should be be killing off the 'include' elements as they're used up?
2460: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2461: return '';
2462: }
2463:
2464: sub end_td {
2465: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2466: my $currentstring = '';
2467: if ($target eq 'web' || $target eq 'webgrade') {
2468: $currentstring = $token->[2];
2469: } elsif ($target eq 'tex') {
2470: $Apache::londefdef::TD_redirection =0;
2471: &end_td_tex($parstack,$parser,$safeeval);
2472: }
2473: return $currentstring;
2474: }
2475:
2476: #-- <th> tag (end tag optional)
2477: sub start_th {
2478: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2479: my $currentstring = '';
2480: if ($target eq 'web' || $target eq 'webgrade') {
2481: $currentstring = $token->[4];
2482: } elsif ($target eq 'tex') {
2483: $Apache::londefdef::TD_redirection = 1;
2484: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2485: }
2486: return $currentstring;
2487: }
2488:
2489: sub tagg_check {
2490: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2491: my @ar=@$parstack;
2492: for (my $i=$#ar-1;$i>=0;$i--) {
2493: if (lc($$tagstack[$i]) eq $good_tag) {
2494: &start_th_tex($parstack,$parser,$safeeval);
2495: last;
2496: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2497: splice @ar, $i+1;
2498: &end_th_tex(\@ar,$parser,$safeeval);
2499: &start_th_tex($parstack,$parser,$safeeval);
2500: last;
2501: }
2502: }
2503: return '';
2504: }
2505:
2506: sub start_th_tex {
2507: my ($parstack,$parser,$safeeval) = @_;
2508: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2509: if ($alignchar eq '') {
2510: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2511: }
2512: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2513: $Apache::londefdef::table[-1]{'counter_columns'}++;
2514: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2515: if (defined $TeXwidth) {
2516: my $current_length=&recalc($TeXwidth);
2517: $current_length=~/(\d+\.?\d*)/;
2518: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2519: }
2520: &Apache::lonxml::startredirection();
2521: return '';
2522: }
2523:
2524: sub end_th_tex {
2525: my ($parstack,$parser,$safeeval) = @_;
2526: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2527: my $data=&Apache::lonxml::endredirection();
2528: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2529: if (defined $TeXwidth) {
2530: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2531: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2532: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2533: } else {
2534: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2535: my $garbage_data=$data;
2536: my $fwidth=0;
2537: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2538: my $current_length=&recalc($1);
2539: $current_length=~/(\d+\.?\d*)/;
2540: if ($fwidth<$1) {$fwidth=$1;}
2541: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2542: }
2543: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2544: my $current_length=$1;
2545: if ($fwidth<$current_length) {$fwidth=$current_length;}
2546: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2547: }
2548: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2549: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2550: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2551: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2552: } else {
2553: $data=~s/^\s+(\S.*)/$1/;
2554: $data=~s/(.*\S)\s+$/$1/;
2555: $data=~s/(\s)+/$1/;
2556: my ($current_length,$min_length)=(0,0);
2557: if ($data=~/\\vskip/) {
2558: my $newdata=$data;
2559: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2560: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2561: foreach my $elementdata (@newdata) {
2562: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2563: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2564: my @words=split(/ /,$elementdata);
2565: foreach my $word (@words) {
2566: my $lengthword=2.5*&LATEX_length($word);
2567: if ($min_length<$lengthword) {$min_length=$lengthword;}
2568: }
2569: }
2570: } else {
2571: $current_length=2.5*&LATEX_length($data);
2572: my @words=split(/ /,$data);
2573: foreach my $word (@words) {
2574: my $lengthword=2*&LATEX_length($word);
2575: if ($min_length<$lengthword) {$min_length=$lengthword;}
2576: }
2577: }
2578: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2579: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2580: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2581: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2582: }
2583: }
2584: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2585: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2586: }
2587: #make data bold
2588: $data='\textbf{'.$data.'}';
2589: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2590: return'';
2591: }
2592:
2593: sub end_th {
2594: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2595: my $currentstring = &end_p(); # Close any open <p> in the row.
2596: if ($target eq 'web' || $target eq 'webgrade') {
2597: $currentstring .= $token->[2];
2598: } elsif ($target eq 'tex') {
2599: $Apache::londefdef::TD_redirection =0;
2600: &end_th_tex($parstack,$parser,$safeeval);
2601: }
2602: return $currentstring;
2603: }
2604:
2605: #-- <img> tag (end tag forbidden)
2606: #
2607: # Render the <IMG> tag.
2608: # <IMG> has the following attributes (in addition to the
2609: # standard HTML ones:
2610: # TeXwrap - Governs how the tex target will try to wrap text around
2611: # horizontally aligned images.
2612: # TeXwidth - The width of the image when rendered for print (mm).
2613: # TeXheight - The height of the image when rendered for print (mm)
2614: # (Note there seems to also be support for this as a % of page size)
2615: #
2616: sub start_img {
2617: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2618: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2619: undef,1);
2620: if (! $src &&
2621: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2622: ) {
2623: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2624: return '';
2625: }
2626: &Apache::lonxml::extlink($src);
2627: my $currentstring = '';
2628: my $scaling = .3;
2629:
2630: # Render unto browsers that which are the browser's...
2631:
2632: if ($target eq 'web' || $target eq 'webgrade') {
2633: if ($env{'browser.imagesuppress'} ne 'on') {
2634: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2635: } else {
2636: my $alttag= &Apache::lonxml::get_param
2637: ('alt',$parstack,$safeeval,undef,1);
2638: unless ($alttag) {
2639: $alttag=&Apache::lonmeta::alttag
2640: ($Apache::lonxml::pwd[-1],$src);
2641: }
2642: $currentstring.='[IMAGE: '.$alttag.']';
2643: }
2644:
2645: # and render unto TeX that which is LaTeX
2646:
2647: } elsif ($target eq 'tex') {
2648: #
2649: # The alignment will require some superstructure to be put around
2650: # the \includegraphics stuff. At present we can only partially
2651: # simulate the alignments offered by html.
2652: #
2653: #
2654: my $align = lc(&Apache::lonxml::get_param('align',
2655: $parstack,
2656: $safeeval,
2657: undef,1));
2658: if(!$align) {
2659: # disabled for now see BUG#4535
2660: if (&is_inside_of($tagstack, "table")) {
2661: $align = "top"; # Force top of image to top of table cell
2662: } else {
2663: $align = "bottom"; # This is html's default so it's ours too.
2664: }
2665: }
2666: #
2667: &Apache::lonxml::debug("Alignemnt = $align");
2668: # LaTeX's image/text wrapping is really bad since it wants to
2669: # make figures float.
2670: # The user has the optional parameter (applicable only to l/r
2671: # alignment to use the picins/parpic directive to get wrapped text
2672: # this is also imperfect.. that's why we give them a choice...
2673: # so they can't yell at us for our choice.
2674: #
2675: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2676: $parstack,
2677: $safeeval,
2678: undef,0);
2679: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2680: if(!$latex_rendering) {
2681: $latex_rendering = "texwrap";
2682: }
2683: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2684:
2685: #if original gif/jpg/png file exist do following:
2686: my $origsrc=$src;
2687: my ($path,$file) = &get_eps_image($src);
2688: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2689: &Apache::lonxml::debug("path = $path file = $file src = $src");
2690: if (-e $src) {
2691: &Apache::lonxml::debug("$src exists");
2692: my ($height_param,$width_param)=
2693: &image_size($origsrc,0.3,$parstack,$safeeval);
2694: my $destpath = $path;
2695: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2696: my $destfile = $file;
2697: $destfile =~ s/ /\_/g;
2698: my $size;
2699: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2700: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2701: $size='['.$size;
2702: $size=~s/,$/]/;
2703: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2704: .'\includegraphics'.$size.'{'.$destfile.'} ';
2705:
2706: # If there's an alignment specification we need to honor it here.
2707: # For the horizontal alignments, we will also honor the
2708: # value of the latex specfication. The default is parbox,
2709: # and that's used for illegal values too.
2710: #
2711: # Even though we set a default alignment value, the user
2712: # could have given us an illegal value. In that case we
2713: # just use the default alignment of bottom..
2714: if ($align eq "top") {
2715: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2716: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2717: my $offset = $height_param/2;
2718: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2719: } elsif ($align eq "left") {
2720: if ($latex_rendering eq "parpic") {
2721: $currentstring = '\parpic[l]{'.$currentstring.'}';
2722: } else { # wrapfig render
2723: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2724: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2725: }
2726: } elsif ($align eq "right") {
2727: if ($latex_rendering eq "parpic") {
2728: $currentstring = '\parpic[r]{'.$currentstring.'}';
2729: } else { # wrapfig rendering
2730: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2731: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2732:
2733: }
2734: } else { # Bottom is also default.
2735: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2736: }
2737: } else {
2738: &Apache::lonxml::debug("$src does not exist");
2739: #original image file doesn't exist so check the alt attribute
2740: my $alt =
2741: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2742: unless ($alt) {
2743: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2744: }
2745:
2746: if ($alt) { $currentstring .= ' '.$alt.' '; }
2747: }
2748:
2749: # And here's where the semi-quote breaks down: allow the user
2750: # to edit the beast as well by rendering the problem for edit:
2751: } elsif ($target eq 'edit') {
2752: $currentstring .=&Apache::edit::tag_start($target,$token);
2753: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2754: &Apache::edit::browse('src',undef,'alt').' '.
2755: &Apache::edit::search('src',undef,'alt').'<br />';
2756: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2757: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2758: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2759: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2760: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2761: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2762: ['','bottom','middle','top','left','right'],$token,5);
2763: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2764: ['', 'parbox', 'parpic'], $token, 2);
2765: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2766: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2767: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2768: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2769: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2770:
2771:
2772: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2773: if ($width) { $currentstring.=' width="'.$width.'" '; }
2774: if ($height) { $currentstring.=' height="'.$height.'" '; }
2775: $currentstring .= ' />';
2776: } elsif ($target eq 'modified') {
2777: my ($osrc,$owidth,$oheight)=
2778: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2779: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2780: $safeeval,'src','alt','align',
2781: 'TeXwidth','TeXheight', 'TeXwrap',
2782: 'width','height');
2783: my ($nsrc,$nwidth,$nheight)=
2784: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2785: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2786: &image_replication($loc);
2787: my ($iwidth,$iheight);
2788: if (-e $loc) {
2789: my $image = Image::Magick->new;
2790: $image->Read($loc);
2791: ($iwidth, $iheight) = ($image->Get('width'),
2792: $image->Get('height'));
2793: }
2794: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2795: # changed image or no size specified,
2796: # if they didn't explicitly change the
2797: # width or height use the ones from the image
2798: if ($iwidth && $iheight) {
2799: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2800: $token->[2]{'width'} = $iwidth;$ctag=1;
2801: }
2802: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2803: $token->[2]{'height'}=$iheight;$ctag=1;
2804: }
2805: }
2806: }
2807: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2808: # if we don't have a width or height
2809: if ($iwidth && $cwidth && !$cheight) {
2810: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2811: }
2812: if ($iheight && $cheight && !$cwidth) {
2813: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2814: }
2815: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2816: }
2817:
2818: return $currentstring;
2819: }
2820:
2821: sub end_img {
2822: my ($target,$token) = @_;
2823: my $currentstring = '';
2824: if ($target eq 'web' || $target eq 'webgrade') {
2825: $currentstring = $token->[2];
2826: } elsif ($target eq 'tex') {
2827: $currentstring = '';
2828: }
2829: return $currentstring;
2830: }
2831:
2832: #-- <applet> tag (end tag required)
2833: sub start_applet {
2834: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2835:
2836: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2837: &Apache::lonxml::extlink($code);
2838: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2839: undef,1);
2840: &Apache::lonxml::extlink($archive);
2841: my $currentstring = '';
2842: if ($target eq 'web' || $target eq 'webgrade') {
2843: if ($env{'browser.appletsuppress'} ne 'on') {
2844: $currentstring = &Apache::lonenc::encrypt_ref($token,
2845: {'code'=>$code,
2846: 'archive'=>$archive}
2847: );
2848: } else {
2849: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2850: $safeeval,undef,1);
2851: unless ($alttag) {
2852: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2853: $code);
2854: }
2855: $currentstring='[APPLET: '.$alttag.']';
2856: }
2857: } elsif ($target eq 'tex') {
2858: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2859: $safeeval,undef,1);
2860: unless ($alttag) {
2861: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2862: undef,1);
2863: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2864: $code);
2865: }
2866: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2867: '.}\end{center}';
2868: }
2869: return $currentstring;
2870: }
2871:
2872: sub end_applet {
2873: my ($target,$token) = @_;
2874: my $currentstring = '';
2875: if ($target eq 'web' || $target eq 'webgrade') {
2876: $currentstring = $token->[2];
2877: } elsif ($target eq 'tex') {
2878: }
2879: return $currentstring;
2880: }
2881:
2882: #-- <embed> tag (end tag optional/required)
2883: sub start_embed {
2884: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2885: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2886: &Apache::lonxml::extlink($src);
2887: my $currentstring = '';
2888: if ($target eq 'web' || $target eq 'webgrade') {
2889: if ($env{'browser.embedsuppress'} ne 'on') {
2890: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2891: } else {
2892: my $alttag=&Apache::lonxml::get_param
2893: ('alt',$parstack,$safeeval,undef,1);
2894: unless ($alttag) {
2895: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2896: }
2897: $currentstring='[EMBED: '.$alttag.']';
2898: }
2899: } elsif ($target eq 'tex') {
2900: }
2901: return $currentstring;
2902: }
2903:
2904: sub end_embed {
2905: my ($target,$token) = @_;
2906: my $currentstring = '';
2907: if ($target eq 'web' || $target eq 'webgrade') {
2908: $currentstring = $token->[2];
2909: } elsif ($target eq 'tex') {
2910: }
2911: return $currentstring;
2912: }
2913:
2914: #-- <param> tag (end tag forbidden)
2915: sub start_param {
2916: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2917: if (&Apache::lonxml::get_param('name',$parstack,
2918: $safeeval,undef,1)=~/^cabbase$/i) {
2919: my $value=&Apache::lonxml::get_param('value',$parstack,
2920: $safeeval,undef,1);
2921: &Apache::lonxml::extlink($value);
2922: }
2923:
2924: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2925: &Apache::lonxml::extlink($src);
2926: my $currentstring = '';
2927: if ($target eq 'web' || $target eq 'webgrade') {
2928: my %toconvert;
2929: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2930: if ($src) { $toconvert{'src'}= $src; }
2931: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
2932: undef,1);
2933: if ($name=~/^cabbase$/i) {
2934: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
2935: $safeeval,undef,1);
2936: }
2937: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
2938: } elsif ($target eq 'tex') {
2939: }
2940: return $currentstring;
2941: }
2942:
2943: sub end_param {
2944: my ($target,$token) = @_;
2945: my $currentstring = '';
2946: if ($target eq 'web' || $target eq 'webgrade') {
2947: $currentstring = $token->[2];
2948: } elsif ($target eq 'tex') {
2949: }
2950: return $currentstring;
2951: }
2952:
2953: #-- <allow> tag
2954: sub start_allow {
2955: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2956: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2957: &Apache::lonxml::extlink($src);
2958:
2959: if ($target eq 'tex') { &image_replication($src); }
2960: my $result;
2961: if ($target eq 'edit') {
2962: $result .=&Apache::edit::tag_start($target,$token);
2963: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
2964: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
2965: } elsif ($target eq 'modified') {
2966: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
2967: $safeeval,'src');
2968: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
2969: }
2970: return $result;
2971: }
2972:
2973: sub end_allow {
2974: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2975: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
2976: return '';
2977: }
2978:
2979: #-- Frames (end tag required)
2980: #-- <frameset>
2981: sub start_frameset {
2982: my ($target,$token) = @_;
2983: my $currentstring = ''; # Close any pending para.
2984: if ($target eq 'web' || $target eq 'webgrade') {
2985: if (!$Apache::lonxml::registered &&
2986: $env{'request.state'} eq 'published') {
2987: $currentstring.='<head>'.
2988: &Apache::lonmenu::registerurl(undef,$target).'</head>';
2989: }
2990: my $onLoad='';
2991: foreach my $key (keys(%{$token->[2]})) {
2992: if ($key =~ /^onload$/i) {
2993: $onLoad.=$token->[2]->{$key}.';';
2994: delete($token->[2]->{$key});
2995: }
2996: }
2997: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
2998: my $onUnload='';
2999: foreach my $key (keys(%{$token->[2]})) {
3000: if ($key =~ /^onunload$/i) {
3001: $onUnload.=$token->[2]->{$key}.';';
3002: delete($token->[2]->{$key});
3003: }
3004: }
3005: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
3006: ';'.$onUnload;
3007:
3008: $currentstring .= '<'.$token->[1];
3009: foreach (keys %{$token->[2]}) {
3010: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
3011: }
3012: $currentstring.='>';
3013: }
3014: return $currentstring;
3015: }
3016:
3017: sub end_frameset {
3018: my ($target,$token) = @_;
3019: my $currentstring = '';
3020: if ($target eq 'web' || $target eq 'webgrade') {
3021: $currentstring = $token->[2];
3022: }
3023: return $currentstring;
3024: }
3025:
3026: #-- <xmp> (end tag required)
3027: sub start_xmp {
3028: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3029: my $currentstring = '';
3030: if ($target eq 'web' || $target eq 'webgrade') {
3031: $currentstring .= $token->[4];
3032: } elsif ($target eq 'tex') {
3033: $currentstring .= '\begin{verbatim}';
3034: }
3035: return $currentstring;
3036: }
3037:
3038: sub end_xmp {
3039: my ($target,$token) = @_;
3040: my $currentstring = '';
3041: if ($target eq 'web' || $target eq 'webgrade') {
3042: $currentstring .= $token->[2];
3043: } elsif ($target eq 'tex') {
3044: $currentstring .= '\end{verbatim}';
3045: }
3046: return $currentstring;
3047: }
3048:
3049: #-- <pre> (end tag required)
3050: sub start_pre {
3051: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3052: my $currentstring = &end_p(); # close off pending <p>
3053: if ($target eq 'web' || $target eq 'webgrade') {
3054: $currentstring .= $token->[4];
3055: } elsif ($target eq 'tex') {
3056: $currentstring .= '\begin{verbatim}';
3057: }
3058: return $currentstring;
3059: }
3060:
3061: sub end_pre {
3062: my ($target,$token) = @_;
3063: my $currentstring = '';
3064: if ($target eq 'web' || $target eq 'webgrade') {
3065: $currentstring .= $token->[2];
3066: } elsif ($target eq 'tex') {
3067: $currentstring .= '\end{verbatim}';
3068: }
3069: return $currentstring;
3070: }
3071:
3072: #-- <insert>
3073: sub start_insert {
3074: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3075: my $currentstring = '';
3076: if ($target eq 'web' || $target eq 'webgrade') {
3077: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3078: $currentstring .= '<b>'.$display.'</b>';;
3079: }
3080: return $currentstring;
3081: }
3082:
3083: sub end_insert {
3084: my ($target,$token) = @_;
3085: my $currentstring = '';
3086: if ($target eq 'web' || $target eq 'webgrade') {
3087: $currentstring .= '';
3088: }
3089: return $currentstring;
3090: }
3091:
3092: #-- <externallink>
3093: sub start_externallink {
3094: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3095: my $currentstring = '';
3096: if ($target eq 'web' || $target eq 'webgrade') {
3097: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3098: $currentstring .= '<b>'.$display.'</b>';;
3099: }
3100: return $currentstring;
3101: }
3102:
3103: sub end_externallink {
3104: my ($target,$token) = @_;
3105: my $currentstring = '';
3106: if ($target eq 'web' || $target eq 'webgrade') {
3107: $currentstring .= '';
3108: }
3109: return $currentstring;
3110: }
3111:
3112: #-- <blankspace heigth="">
3113: sub start_blankspace {
3114: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3115: my $currentstring = &end_p(); # closes off any unclosed <p>
3116: if ($target eq 'tex') {
3117: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3118: $currentstring .= '\vskip '.$howmuch.' ';
3119: }
3120: return $currentstring;
3121: }
3122:
3123: sub end_blankspace {
3124: my ($target,$token) = @_;
3125: my $currentstring = '';
3126: if ($target eq 'tex') {
3127: $currentstring .= '';
3128: }
3129: return $currentstring;
3130: }
3131:
3132: #-- <abbr> tag (end tag required)
3133: sub start_abbr {
3134: my ($target,$token) = @_;
3135: my $currentstring = '';
3136: if ($target eq 'web' || $target eq 'webgrade') {
3137: $currentstring = $token->[4];
3138: }
3139: return $currentstring;
3140: }
3141:
3142: sub end_abbr {
3143: my ($target,$token) = @_;
3144: my $currentstring = '';
3145: if ($target eq 'web' || $target eq 'webgrade') {
3146: $currentstring = $token->[2];
3147: }
3148: return $currentstring;
3149: }
3150:
3151: #-- <acronym> tag (end tag required)
3152: sub start_acronym {
3153: my ($target,$token) = @_;
3154: my $currentstring = '';
3155: if ($target eq 'web' || $target eq 'webgrade') {
3156: $currentstring = $token->[4];
3157: }
3158: return $currentstring;
3159: }
3160:
3161: sub end_acronym {
3162: my ($target,$token) = @_;
3163: my $currentstring = '';
3164: if ($target eq 'web' || $target eq 'webgrade') {
3165: $currentstring = $token->[2];
3166: }
3167: return $currentstring;
3168: }
3169:
3170: #-- <area> tag (end tag forbidden)
3171: sub start_area {
3172: my ($target,$token) = @_;
3173: my $currentstring = '';
3174: if ($target eq 'web' || $target eq 'webgrade') {
3175: $currentstring = $token->[4];
3176: }
3177: return $currentstring;
3178: }
3179:
3180: sub end_area {
3181: my ($target,$token) = @_;
3182: my $currentstring = '';
3183: if ($target eq 'web' || $target eq 'webgrade') {
3184: $currentstring = $token->[2];
3185: }
3186: return $currentstring;
3187: }
3188:
3189: #-- <base> tag (end tag forbidden)
3190: sub start_base {
3191: my ($target,$token) = @_;
3192: my $currentstring = '';
3193: if ($target eq 'web' || $target eq 'webgrade') {
3194: $currentstring = $token->[4];
3195: }
3196: return $currentstring;
3197: }
3198:
3199: sub end_base {
3200: my ($target,$token) = @_;
3201: my $currentstring = '';
3202: if ($target eq 'web' || $target eq 'webgrade') {
3203: $currentstring = $token->[2];
3204: }
3205: return $currentstring;
3206: }
3207:
3208: #-- <bdo> tag (end tag required)
3209: sub start_bdo {
3210: my ($target,$token) = @_;
3211: my $currentstring = '';
3212: if ($target eq 'web' || $target eq 'webgrade') {
3213: $currentstring = $token->[4];
3214: }
3215: return $currentstring;
3216: }
3217:
3218: sub end_bdo {
3219: my ($target,$token) = @_;
3220: my $currentstring = '';
3221: if ($target eq 'web' || $target eq 'webgrade') {
3222: $currentstring = $token->[2];
3223: }
3224: return $currentstring;
3225: }
3226:
3227: #-- <bgsound> tag (end tag optional)
3228: sub start_bgsound {
3229: my ($target,$token) = @_;
3230: my $currentstring = '';
3231: if ($target eq 'web' || $target eq 'webgrade') {
3232: $currentstring = $token->[4];
3233: }
3234: return $currentstring;
3235: }
3236:
3237: sub end_bgsound {
3238: my ($target,$token) = @_;
3239: my $currentstring = '';
3240: if ($target eq 'web' || $target eq 'webgrade') {
3241: $currentstring = $token->[2];
3242: }
3243: return $currentstring;
3244: }
3245:
3246: #-- <blink> tag (end tag required)
3247: sub start_blink {
3248: my ($target,$token) = @_;
3249: my $currentstring = '';
3250: if ($target eq 'web' || $target eq 'webgrade') {
3251: $currentstring = $token->[4];
3252: }
3253: return $currentstring;
3254: }
3255:
3256: sub end_blink {
3257: my ($target,$token) = @_;
3258: my $currentstring = '';
3259: if ($target eq 'web' || $target eq 'webgrade') {
3260: $currentstring = $token->[2];
3261: }
3262: return $currentstring;
3263: }
3264:
3265: #-- <blockquote> tag (end tag required)
3266: sub start_blockquote {
3267: my ($target,$token) = @_;
3268: my $currentstring = &end_p(); # Close any unclosed <p>
3269: if ($target eq 'web' || $target eq 'webgrade') {
3270: $currentstring .= $token->[4];
3271: }
3272: return $currentstring;
3273: }
3274:
3275: sub end_blockquote {
3276: my ($target,$token) = @_;
3277: my $currentstring = '';
3278: if ($target eq 'web' || $target eq 'webgrade') {
3279: $currentstring = $token->[2];
3280: }
3281: return $currentstring;
3282: }
3283:
3284: #-- <button> tag (end tag required)
3285: sub start_button {
3286: my ($target,$token) = @_;
3287: my $currentstring = '';
3288: if ($target eq 'web' || $target eq 'webgrade') {
3289: $currentstring = $token->[4];
3290: }
3291: return $currentstring;
3292: }
3293:
3294: sub end_button {
3295: my ($target,$token) = @_;
3296: my $currentstring = '';
3297: if ($target eq 'web' || $target eq 'webgrade') {
3298: $currentstring = $token->[2];
3299: }
3300: return $currentstring;
3301: }
3302:
3303: #-- <caption> tag (end tag required)
3304: sub start_caption {
3305: my ($target,$token) = @_;
3306: my $currentstring = '';
3307: if ($target eq 'web' || $target eq 'webgrade') {
3308: $currentstring = $token->[4];
3309: }
3310: return $currentstring;
3311: }
3312:
3313: sub end_caption {
3314: my ($target,$token) = @_;
3315: my $currentstring = '';
3316: if ($target eq 'web' || $target eq 'webgrade') {
3317: $currentstring = $token->[2];
3318: }
3319: return $currentstring;
3320: }
3321:
3322: #-- <col> tag (end tag forbdden)
3323: sub start_col {
3324: my ($target,$token) = @_;
3325: my $currentstring = '';
3326: if ($target eq 'web' || $target eq 'webgrade') {
3327: $currentstring = $token->[4];
3328: }
3329: return $currentstring;
3330: }
3331:
3332: sub end_col {
3333: my ($target,$token) = @_;
3334: my $currentstring = '';
3335: if ($target eq 'web' || $target eq 'webgrade') {
3336: $currentstring = $token->[2];
3337: }
3338: return $currentstring;
3339: }
3340:
3341: #-- <colgroup> tag (end tag optional)
3342: sub start_colgroup {
3343: my ($target,$token) = @_;
3344: my $currentstring = '';
3345: if ($target eq 'web' || $target eq 'webgrade') {
3346: $currentstring = $token->[4];
3347: }
3348: return $currentstring;
3349: }
3350:
3351: sub end_colgroup {
3352: my ($target,$token) = @_;
3353: my $currentstring = '';
3354: if ($target eq 'web' || $target eq 'webgrade') {
3355: $currentstring = $token->[2];
3356: }
3357: return $currentstring;
3358: }
3359:
3360: #-- <del> tag (end tag required)
3361: sub start_del {
3362: my ($target,$token) = @_;
3363: my $currentstring = '';
3364: if ($target eq 'web' || $target eq 'webgrade') {
3365: $currentstring = $token->[4];
3366: }
3367: return $currentstring;
3368: }
3369:
3370: sub end_del {
3371: my ($target,$token) = @_;
3372: my $currentstring = '';
3373: if ($target eq 'web' || $target eq 'webgrade') {
3374: $currentstring = $token->[2];
3375: }
3376: return $currentstring;
3377: }
3378:
3379: #-- <fieldset> tag (end tag required)
3380: sub start_fieldset {
3381: my ($target,$token) = @_;
3382: my $currentstring = '';
3383: if ($target eq 'web' || $target eq 'webgrade') {
3384: $currentstring = $token->[4];
3385: }
3386: return $currentstring;
3387: }
3388:
3389: sub end_fieldset {
3390: my ($target,$token) = @_;
3391: my $currentstring = '';
3392: if ($target eq 'web' || $target eq 'webgrade') {
3393: $currentstring = $token->[2];
3394: }
3395: return $currentstring;
3396: }
3397:
3398: #-- <frame> tag (end tag forbidden)
3399: sub start_frame {
3400: my ($target,$token) = @_;
3401: my $currentstring = '';
3402: if ($target eq 'web' || $target eq 'webgrade') {
3403: $currentstring = $token->[4];
3404: }
3405: return $currentstring;
3406: }
3407:
3408: sub end_frame {
3409: my ($target,$token) = @_;
3410: my $currentstring = '';
3411: if ($target eq 'web' || $target eq 'webgrade') {
3412: $currentstring = $token->[2];
3413: }
3414: return $currentstring;
3415: }
3416:
3417: #-- <iframe> tag (end tag required)
3418: sub start_iframe {
3419: my ($target,$token) = @_;
3420: my $currentstring = '';
3421: if ($target eq 'web' || $target eq 'webgrade') {
3422: $currentstring = $token->[4];
3423: }
3424: return $currentstring;
3425: }
3426:
3427: sub end_iframe {
3428: my ($target,$token) = @_;
3429: my $currentstring = '';
3430: if ($target eq 'web' || $target eq 'webgrade') {
3431: $currentstring = $token->[2];
3432: }
3433: return $currentstring;
3434: }
3435:
3436: #-- <ins> tag (end tag required)
3437: sub start_ins {
3438: my ($target,$token) = @_;
3439: my $currentstring = '';
3440: if ($target eq 'web' || $target eq 'webgrade') {
3441: $currentstring = $token->[4];
3442: }
3443: return $currentstring;
3444: }
3445:
3446: sub end_ins {
3447: my ($target,$token) = @_;
3448: my $currentstring = '';
3449: if ($target eq 'web' || $target eq 'webgrade') {
3450: $currentstring = $token->[2];
3451: }
3452: return $currentstring;
3453: }
3454:
3455: #-- <isindex> tag (end tag forbidden)
3456: sub start_isindex {
3457: my ($target,$token) = @_;
3458: my $currentstring = '';
3459: if ($target eq 'web' || $target eq 'webgrade') {
3460: $currentstring = $token->[4];
3461: }
3462: return $currentstring;
3463: }
3464:
3465: sub end_isindex {
3466: my ($target,$token) = @_;
3467: my $currentstring = '';
3468: if ($target eq 'web' || $target eq 'webgrade') {
3469: $currentstring = $token->[2];
3470: }
3471: return $currentstring;
3472: }
3473:
3474: #-- <keygen> tag (end tag forbidden)
3475: sub start_keygen {
3476: my ($target,$token) = @_;
3477: my $currentstring = '';
3478: if ($target eq 'web' || $target eq 'webgrade') {
3479: $currentstring = $token->[4];
3480: }
3481: return $currentstring;
3482: }
3483:
3484: sub end_keygen {
3485: my ($target,$token) = @_;
3486: my $currentstring = '';
3487: if ($target eq 'web' || $target eq 'webgrade') {
3488: $currentstring = $token->[2];
3489: }
3490: return $currentstring;
3491: }
3492:
3493: #-- <label> tag
3494: sub start_label {
3495: my ($target,$token) = @_;
3496: my $currentstring = '';
3497: if ($target eq 'web' || $target eq 'webgrade') {
3498: $currentstring = $token->[4];
3499: }
3500: return $currentstring;
3501: }
3502:
3503: sub end_label {
3504: my ($target,$token) = @_;
3505: my $currentstring = '';
3506: if ($target eq 'web' || $target eq 'webgrade') {
3507: $currentstring = $token->[2];
3508: }
3509: return $currentstring;
3510: }
3511:
3512: #-- <layer> tag (end tag required)
3513: sub start_layer {
3514: my ($target,$token) = @_;
3515: my $currentstring = '';
3516: if ($target eq 'web' || $target eq 'webgrade') {
3517: $currentstring = $token->[4];
3518: }
3519: return $currentstring;
3520: }
3521:
3522: sub end_layer {
3523: my ($target,$token) = @_;
3524: my $currentstring = '';
3525: if ($target eq 'web' || $target eq 'webgrade') {
3526: $currentstring = $token->[2];
3527: }
3528: return $currentstring;
3529: }
3530:
3531: #-- <legend> tag (end tag required)
3532: sub start_legend {
3533: my ($target,$token) = @_;
3534: my $currentstring = '';
3535: if ($target eq 'web' || $target eq 'webgrade') {
3536: $currentstring = $token->[4];
3537: }
3538: return $currentstring;
3539: }
3540:
3541: sub end_legend {
3542: my ($target,$token) = @_;
3543: my $currentstring = '';
3544: if ($target eq 'web' || $target eq 'webgrade') {
3545: $currentstring = $token->[2];
3546: }
3547: return $currentstring;
3548: }
3549:
3550: #-- <link> tag (end tag forbidden)
3551: sub start_link {
3552: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3553: my $currentstring = '';
3554: if ($target eq 'web' || $target eq 'webgrade') {
3555: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3556: undef,1);
3557: &Apache::lonxml::extlink($href);
3558: $currentstring = $token->[4];
3559: }
3560: return $currentstring;
3561: }
3562:
3563: sub end_link {
3564: my ($target,$token) = @_;
3565: my $currentstring = '';
3566: if ($target eq 'web' || $target eq 'webgrade') {
3567: $currentstring = $token->[2];
3568: }
3569: return $currentstring;
3570: }
3571:
3572: #-- <marquee> tag (end tag optional)
3573: sub start_marquee {
3574: my ($target,$token) = @_;
3575: my $currentstring = '';
3576: if ($target eq 'web' || $target eq 'webgrade') {
3577: $currentstring = $token->[4];
3578: }
3579: return $currentstring;
3580: }
3581:
3582: sub end_marquee {
3583: my ($target,$token) = @_;
3584: my $currentstring = '';
3585: if ($target eq 'web' || $target eq 'webgrade') {
3586: $currentstring = $token->[2];
3587: }
3588: return $currentstring;
3589: }
3590:
3591: #-- <multicol> tag (end tag required)
3592: sub start_multicol {
3593: my ($target,$token) = @_;
3594: my $currentstring = &end_p(); # Close any pending <p>
3595: if ($target eq 'web' || $target eq 'webgrade') {
3596: $currentstring .= $token->[4];
3597: }
3598: return $currentstring;
3599: }
3600:
3601: sub end_multicol {
3602: my ($target,$token) = @_;
3603: my $currentstring = '';
3604: if ($target eq 'web' || $target eq 'webgrade') {
3605: $currentstring = $token->[2];
3606: }
3607: return $currentstring;
3608: }
3609:
3610: #-- <nobr> tag (end tag required)
3611: sub start_nobr {
3612: my ($target,$token) = @_;
3613: my $currentstring = '';
3614: if ($target eq 'web' || $target eq 'webgrade') {
3615: $currentstring = $token->[4];
3616: } elsif ($target eq 'tex') {
3617: $currentstring='\mbox{';
3618: }
3619: return $currentstring;
3620: }
3621:
3622: sub end_nobr {
3623: my ($target,$token) = @_;
3624: my $currentstring = '';
3625: if ($target eq 'web' || $target eq 'webgrade') {
3626: $currentstring = $token->[2];
3627: } elsif ($target eq 'tex') {
3628: $currentstring='}';
3629: }
3630: return $currentstring;
3631: }
3632:
3633: #-- <noembed> tag (end tag required)
3634: sub start_noembed {
3635: my ($target,$token) = @_;
3636: my $currentstring = '';
3637: if ($target eq 'web' || $target eq 'webgrade') {
3638: $currentstring = $token->[4];
3639: }
3640: return $currentstring;
3641: }
3642:
3643: sub end_noembed {
3644: my ($target,$token) = @_;
3645: my $currentstring = '';
3646: if ($target eq 'web' || $target eq 'webgrade') {
3647: $currentstring = $token->[2];
3648: }
3649: return $currentstring;
3650: }
3651:
3652: #-- <noframes> tag (end tag required)
3653: sub start_noframes {
3654: my ($target,$token) = @_;
3655: my $currentstring = '';
3656: if ($target eq 'web' || $target eq 'webgrade') {
3657: $currentstring = $token->[4];
3658: }
3659: return $currentstring;
3660: }
3661:
3662: sub end_noframes {
3663: my ($target,$token) = @_;
3664: my $currentstring = '';
3665: if ($target eq 'web' || $target eq 'webgrade') {
3666: $currentstring = $token->[2];
3667: }
3668: return $currentstring;
3669: }
3670:
3671: #-- <nolayer> tag (end tag required)
3672: sub start_nolayer {
3673: my ($target,$token) = @_;
3674: my $currentstring = '';
3675: if ($target eq 'web' || $target eq 'webgrade') {
3676: $currentstring = $token->[4];
3677: }
3678: return $currentstring;
3679: }
3680:
3681: sub end_nolayer {
3682: my ($target,$token) = @_;
3683: my $currentstring = '';
3684: if ($target eq 'web' || $target eq 'webgrade') {
3685: $currentstring = $token->[2];
3686: }
3687: return $currentstring;
3688: }
3689:
3690: #-- <noscript> tag (end tag required)
3691: sub start_noscript {
3692: my ($target,$token) = @_;
3693: my $currentstring = '';
3694: if ($target eq 'web' || $target eq 'webgrade') {
3695: $currentstring = $token->[4];
3696: }
3697: return $currentstring;
3698: }
3699:
3700: sub end_noscript {
3701: my ($target,$token) = @_;
3702: my $currentstring = '';
3703: if ($target eq 'web' || $target eq 'webgrade') {
3704: $currentstring = $token->[2];
3705: }
3706: return $currentstring;
3707: }
3708:
3709: #-- <object> tag (end tag required)
3710: sub start_object {
3711: my ($target,$token) = @_;
3712: my $currentstring = '';
3713: if ($target eq 'web' || $target eq 'webgrade') {
3714: $currentstring = $token->[4];
3715: }
3716: return $currentstring;
3717: }
3718:
3719: sub end_object {
3720: my ($target,$token) = @_;
3721: my $currentstring = '';
3722: if ($target eq 'web' || $target eq 'webgrade') {
3723: $currentstring = $token->[2];
3724: }
3725: return $currentstring;
3726: }
3727:
3728: #-- <optgroup> tag (end tag required)
3729: sub start_optgroup {
3730: my ($target,$token) = @_;
3731: my $currentstring = '';
3732: if ($target eq 'web' || $target eq 'webgrade') {
3733: $currentstring = $token->[4];
3734: }
3735: return $currentstring;
3736: }
3737:
3738: sub end_optgroup {
3739: my ($target,$token) = @_;
3740: my $currentstring = '';
3741: if ($target eq 'web' || $target eq 'webgrade') {
3742: $currentstring = $token->[2];
3743: }
3744: return $currentstring;
3745: }
3746:
3747: #-- <samp> tag (end tag required)
3748: sub start_samp {
3749: my ($target,$token) = @_;
3750: my $currentstring = '';
3751: if ($target eq 'web' || $target eq 'webgrade') {
3752: $currentstring = $token->[4];
3753: } elsif ($target eq 'tex') {
3754: $currentstring='\texttt{';
3755: }
3756: return $currentstring;
3757: }
3758:
3759: sub end_samp {
3760: my ($target,$token) = @_;
3761: my $currentstring = '';
3762: if ($target eq 'web' || $target eq 'webgrade') {
3763: $currentstring = $token->[2];
3764: } elsif ($target eq 'tex') {
3765: $currentstring='}';
3766: }
3767: return $currentstring;
3768: }
3769:
3770: #-- <server> tag
3771: sub start_server {
3772: my ($target,$token) = @_;
3773: my $currentstring = '';
3774: if ($target eq 'web' || $target eq 'webgrade') {
3775: $currentstring = $token->[4];
3776: }
3777: return $currentstring;
3778: }
3779:
3780: sub end_server {
3781: my ($target,$token) = @_;
3782: my $currentstring = '';
3783: if ($target eq 'web' || $target eq 'webgrade') {
3784: $currentstring = $token->[2];
3785: }
3786: return $currentstring;
3787: }
3788:
3789: #-- <spacer> tag (end tag forbidden)
3790: sub start_spacer {
3791: my ($target,$token) = @_;
3792: my $currentstring = &end_p(); # Close off any open <p> tag.
3793: if ($target eq 'web' || $target eq 'webgrade') {
3794: $currentstring .= $token->[4];
3795: }
3796: return $currentstring;
3797: }
3798:
3799: sub end_spacer {
3800: my ($target,$token) = @_;
3801: my $currentstring = '';
3802: if ($target eq 'web' || $target eq 'webgrade') {
3803: $currentstring = $token->[2];
3804: }
3805: return $currentstring;
3806: }
3807:
3808: #-- <span> tag (end tag required)
3809: sub start_span {
3810: my ($target,$token) = @_;
3811: my $currentstring = '';
3812: if ($target eq 'web' || $target eq 'webgrade') {
3813: $currentstring = $token->[4];
3814: }
3815: return $currentstring;
3816: }
3817:
3818: sub end_span {
3819: my ($target,$token) = @_;
3820: my $currentstring = '';
3821: if ($target eq 'web' || $target eq 'webgrade') {
3822: $currentstring = $token->[2];
3823: }
3824: return $currentstring;
3825: }
3826:
3827: #-- <tbody> tag (end tag optional)
3828: sub start_tbody {
3829: my ($target,$token) = @_;
3830: my $currentstring = '';
3831: if ($target eq 'web' || $target eq 'webgrade') {
3832: $currentstring = $token->[4];
3833: }
3834: return $currentstring;
3835: }
3836:
3837: sub end_tbody {
3838: my ($target,$token) = @_;
3839: my $currentstring = '';
3840: if ($target eq 'web' || $target eq 'webgrade') {
3841: $currentstring = $token->[2];
3842: }
3843: return $currentstring;
3844: }
3845:
3846: #-- <tfoot> tag (end tag optional)
3847: sub start_tfoot {
3848: my ($target,$token) = @_;
3849: my $currentstring = '';
3850: if ($target eq 'web' || $target eq 'webgrade') {
3851: $currentstring = $token->[4];
3852: }
3853: return $currentstring;
3854: }
3855:
3856: sub end_tfoot {
3857: my ($target,$token) = @_;
3858: my $currentstring = '';
3859: if ($target eq 'web' || $target eq 'webgrade') {
3860: $currentstring = $token->[2];
3861: }
3862: return $currentstring;
3863: }
3864:
3865: #-- <thead> tag (end tag optional)
3866: sub start_thead {
3867: my ($target,$token) = @_;
3868: my $currentstring = '';
3869: if ($target eq 'web' || $target eq 'webgrade') {
3870: $currentstring = $token->[4];
3871: }
3872: return $currentstring;
3873: }
3874:
3875: sub end_thead {
3876: my ($target,$token) = @_;
3877: my $currentstring = '';
3878: if ($target eq 'web' || $target eq 'webgrade') {
3879: $currentstring = $token->[2];
3880: }
3881: return $currentstring;
3882: }
3883:
3884: #-- <var> tag
3885: sub start_var {
3886: my ($target,$token) = @_;
3887: my $currentstring = '';
3888: if ($target eq 'web' || $target eq 'webgrade') {
3889: $currentstring = $token->[4];
3890: } elsif ($target eq 'tex') {
3891: $currentstring = '\textit{';
3892: }
3893: return $currentstring;
3894: }
3895:
3896: sub end_var {
3897: my ($target,$token) = @_;
3898: my $currentstring = '';
3899: if ($target eq 'web' || $target eq 'webgrade') {
3900: $currentstring = $token->[2];
3901: } elsif ($target eq 'tex') {
3902: $currentstring = '}';
3903: }
3904: return $currentstring;
3905: }
3906:
3907: #-- <wbr> tag (end tag forbidden)
3908: sub start_wbr {
3909: my ($target,$token) = @_;
3910: my $currentstring = '';
3911: if ($target eq 'web' || $target eq 'webgrade') {
3912: $currentstring = $token->[4];
3913: }
3914: return $currentstring;
3915: }
3916:
3917: sub end_wbr {
3918: my ($target,$token) = @_;
3919: my $currentstring = '';
3920: if ($target eq 'web' || $target eq 'webgrade') {
3921: $currentstring = $token->[2];
3922: }
3923: return $currentstring;
3924: }
3925:
3926: #-- <hideweboutput> tag
3927: sub start_hideweboutput {
3928: my ($target,$token) = @_;
3929: if ($target eq 'web' || $target eq 'webgrade') {
3930: &Apache::lonxml::startredirection();
3931: }
3932: return '';
3933: }
3934:
3935: sub end_hideweboutput {
3936: my ($target,$token) = @_;
3937: my $currentstring = '';
3938: if ($target eq 'web' || $target eq 'webgrade') {
3939: $currentstring = &Apache::lonxml::endredirection();
3940: }
3941: return '';
3942: }
3943:
3944:
3945: sub image_replication {
3946: my $src = shift;
3947: if (not -e $src) { &Apache::lonnet::repcopy($src); }
3948: #replicates eps or ps
3949: my $epssrc = my $pssrc = $src;
3950: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
3951: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
3952: if (not -e $epssrc && not -e $pssrc) {
3953: my $result=&Apache::lonnet::repcopy($epssrc);
3954: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
3955: }
3956: return '';
3957: }
3958: #
3959: # Get correct sizing parameter for an image given
3960: # it's initial ht. and wid. This allows sizing of
3961: # images that are generated on-the-fly (e.g. gnuplot)
3962: # as well as serving as a utility for image_size.
3963: #
3964: # Parameter:
3965: # height_param
3966: # width_param - Initial picture dimensions.
3967: # scaling - A scale factor.
3968: # parstack, - the current stack of tag attributes
3969: # from the xml parser
3970: # safeeval, - pointer to the safespace
3971: # depth, - from what level in the stack to look for attributes
3972: # (assumes -1 if unspecified)
3973: # cis - look for attrubutes case insensitively
3974: # (assumes false)
3975: #
3976: # Returns:
3977: # height, width - new dimensions.
3978: #
3979: sub resize_image {
3980: my ($height_param, $width_param, $scaling,
3981: $parstack, $safeeval, $depth, $cis) = @_;
3982:
3983: # First apply the scaling...
3984:
3985: $height_param = $height_param * $scaling;
3986: $width_param = $width_param * $scaling;
3987:
3988: #do we have any specified LaTeX size of the picture?
3989: my $toget='TeXwidth';
3990: if ($cis) {
3991: $toget=lc($toget);
3992: }
3993: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
3994: $safeeval,$depth,$cis);
3995: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
3996: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
3997: $safeeval,$depth,$cis);
3998: #do we have any specified web size of the picture?
3999: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4000: $depth,1);
4001: if ($TeXwidth) {
4002: my $old_width_param=$width_param;
4003: if ($TeXwidth=~/(\d+)\s*\%/) {
4004: $width_param = $1*$env{'form.textwidth'}/100;
4005: } else {
4006: $width_param = $TeXwidth;
4007: }
4008: if ($TeXheight) {
4009: $height_param = $TeXheight;
4010: } elsif ($old_width_param) {
4011: $height_param=$TeXwidth/$old_width_param*$height_param;
4012: }
4013: } elsif ($TeXheight) {
4014: $height_param = $TeXheight;
4015: if ($height_param) {
4016: $width_param = $TeXheight/$height_param*$width_param;
4017: }
4018: } elsif ($width) {
4019: my $old_width_param=$width_param;
4020: $width_param = $width*$scaling;
4021: if ($old_width_param) {
4022: $height_param=$width_param/$old_width_param*$height_param;
4023: }
4024: }
4025: if ($width_param > $env{'form.textwidth'}) {
4026: my $old_width_param=$width_param;
4027: $width_param =0.95*$env{'form.textwidth'};
4028: if ($old_width_param) {
4029: $height_param=$width_param/$old_width_param*$height_param;
4030: }
4031: }
4032:
4033: return ($height_param, $width_param);
4034: }
4035:
4036: sub image_size {
4037: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4038:
4039: #size of image from gif/jpg/jpeg/png
4040: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4041: if (-e $ressrc) {
4042: $src = $ressrc;
4043: }
4044: my $image = Image::Magick->new;
4045: my $current_figure = $image->Read($src);
4046: my $width_param = $image->Get('width');
4047: my $height_param = $image->Get('height');
4048: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4049: undef($image);
4050:
4051: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4052: $scaling, $parstack, $safeeval,
4053: $depth, $cis);
4054:
4055: return ($height_param, $width_param);
4056: }
4057:
4058: sub image_width {
4059: my ($height, $width) = &image_size(@_);
4060: return $width;
4061: }
4062: # Not yet 100% sure this is correct in all circumstances..
4063: # due to my uncertainty about mods to image_size.
4064: #
4065: sub image_height {
4066: my ($height, $width) = &image_size(@_);
4067: return $height;
4068: }
4069:
4070: sub get_eps_image {
4071: my ($src)=@_;
4072: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4073:
4074: # In order to prevent the substitution of the alt text, we need to
4075: # be sure the orig_src file is on system now so:
4076:
4077: if (! -e $orig_src) {
4078: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4079: }
4080: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4081: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4082: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4083: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4084: &Apache::lonxml::debug("Filelocation gives: $src");
4085: if (! -e $src) {
4086: &Apache::lonxml::debug("$src does not exist");
4087: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4088: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4089: #if replication failed try to find ps file
4090: $src=~s/\.eps$/\.ps/;
4091: &Apache::lonxml::debug("Now looking for $src");
4092: #if no ps file try to replicate it.
4093: my $didrepcopy = &Apache::lonnet::repcopy($src);
4094: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4095: if ( (not -e $src) ||
4096: ($didrepcopy ne 'ok')) {
4097: &Apache::lonxml::debug("Failed to find or replicate $src");
4098:
4099: #if replication failed try to produce eps file dynamically
4100: $src=~s/\.ps$/\.eps/;
4101: my $temp_file;
4102: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4103: my $newsrc=$orig_src;
4104: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4105: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4106: print FILE "$newsrc\n";
4107: close FILE;
4108: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4109: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4110: if ($sext ne "") { # Put the ext. back in to uniquify.
4111: $src =~ s/\.eps$/$sext.eps/;
4112: }
4113: }
4114: }
4115: }
4116: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4117: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4118: return ($path.'/',$file);
4119: }
4120:
4121: sub eps_generation {
4122: my ($src,$file,$width_param) = @_;
4123: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4124: my $temp_file = Apache::File->new('>>'.$filename);
4125: print $temp_file "$src\n";
4126: my $newsrc = $src;
4127: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4128: $newsrc=~s/\/home\/httpd\/html\/res//;
4129: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4130: $newsrc=~s/\/\.\//\//;
4131: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4132: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4133: $newsrc=~s/\/home\/httpd\/lonUsers//;
4134: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4135: }
4136: if ($newsrc=~/\/userfiles\//) {
4137: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4138: } else {
4139: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4140: }
4141: }
4142:
4143: sub file_path {
4144: my $src=shift;
4145: my ($file,$path);
4146: if ($src =~ m!(.*)/([^/]*)$!) {
4147: $file = $2;
4148: $path = $1.'/';
4149: }
4150: return $file,$path;
4151: }
4152: # Converts a measurement in to mm from any of
4153: # the other valid LaTeX units of measure.
4154: # If the units of measure are missing from the
4155: # parameter, it is assumed to be in and returned
4156: # with mm units of measure
4157: sub recalc {
4158: my $argument = shift;
4159: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4160: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4161: my $value=$1;
4162: my $units=$2;
4163: if ($units eq 'cm') {
4164: $value*=10;
4165: } elsif ($units eq 'in') {
4166: $value*=25.4;
4167: } elsif ($units eq 'pc') {
4168: $value*=(25.4*12/72.27);
4169: } elsif ($units eq 'pt') {
4170: $value*=(25.4/72.27);
4171: }
4172: return $value.' mm';
4173: }
4174:
4175: sub LATEX_length {
4176: my $garbage=shift;
4177: $garbage=~s/^\s+$//;
4178: $garbage=~s/^\s+(\S.*)/$1/;#space before
4179: $garbage=~s/(.*\S)\s+$/$1/;#space after
4180: $garbage=~s/(\s)+/$1/;#only one space
4181: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4182: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4183: $garbage=~s/([^\\])\$/$1/g;#$
4184: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4185: $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;
4186: $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;
4187: $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;
4188: $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;
4189: $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;
4190: $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;
4191: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4192: #remove some other LaTeX command
4193: $garbage=~s|\\(\w+)\\|\\|g;
4194: $garbage=~s|\\(\w+)(\s*)|$2|g;
4195: $garbage=~s|\+|11|g;
4196: my $value=length($garbage);
4197: return $value;
4198: }
4199:
4200:
4201: # is_inside_of $tagstack $tag
4202: # This sub returns true if the current state of Xml processing
4203: # is inside of the tag.
4204: # Parameters:
4205: # tagstack - The tagstack from the parser.
4206: # tag - The tag (without the <>'s.).
4207: # Sample usage:
4208: # if (is_inside_of($tagstack "table")) {
4209: # # I'm in a table....
4210: # }
4211: sub is_inside_of {
4212: my ($tagstack, $tag) = @_;
4213: my @stack = @$tagstack;
4214: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4215: if ($stack[$i] eq $tag) {
4216: return 1;
4217: }
4218: }
4219: return 0;
4220: }
4221:
4222:
4223: 1;
4224: __END__
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