1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.389 2008/05/28 01:32:59 www 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::lonlocal;
50: use Apache::Constants qw(:common);
51: use File::Basename;
52: use LONCAPA();
53: # use Data::Dumper;
54:
55: BEGIN {
56:
57: &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'));
58:
59: }
60:
61: #
62: # Dumps all elements of the table structure.
63: # Need this 'cause evidently when given an array, Data::Dumper only seems
64: # to dump element 0.
65: #
66: #sub debug_dump_table {
67: # my $lastrow = $#Apache::londefdef::table;
68: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
69: # my $row;
70: # for ($row =0; $row <= $lastrow; $row++ ) {
71: # my $text = Dumper($Apache::londefdef::table[$row]);
72: # &Apache::lonnet::logthis("table [ $row ]".$text);
73: # }
74: #}
75: sub initialize_londefdef {
76: $Apache::londefdef::TD_redirection=0;
77: @Apache::londefdef::table = ();
78: $Apache::londefdef::select=0;
79: undef(@Apache::londefdef::description);
80: @Apache::londefdef::DD=(0);
81: @Apache::londefdef::DT=(0);
82: @Apache::londefdef::seenDT=(0);
83: $Apache::londefdef::list_index=0;
84: undef($Apache::londefdef::head);
85: undef($Apache::londefdef::title);
86: }
87:
88: #======================= TAG SUBROUTINES =====================
89: #-- <output>
90: sub start_output {
91: my ($target) = @_;
92: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
93: return '';
94: }
95: sub end_output {
96: my ($target) = @_;
97: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
98: return '';
99: }
100: #-- <m> tag
101: sub start_m {
102: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
103: my $currentstring = '';
104: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
105: if ($target eq 'web' || $target eq 'analyze') {
106: &Apache::lonxml::debug("M is starting with:$inside:");
107: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
108: if ($eval eq 'on') {
109: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
110: #&Apache::lonxml::debug("M is evaulated to:$inside:");
111: }
112: my $tex = $inside;
113: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
114: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
115: if ($Apache::lontexconvert::errorstring) {
116: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
117: $tex = &HTML::Entities::encode($tex,'<>&"');
118: my ($linenumber) =
119: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
120: if (defined($linenumber)) {
121: my @tex=split("\n",$tex);
122: $tex[$linenumber]='<b><font color="red">'.
123: $tex[$linenumber].'</font></b>';
124: $tex=join("\n",@tex);
125: }
126: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
127: $Apache::lontexconvert::errorstring='';
128: }
129: #&Apache::lonxml::debug("M is ends with:$currentstring:");
130: $Apache::lonxml::post_evaluate=0;
131: } elsif ($target eq 'tex') {
132:
133: $currentstring = $inside;
134: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
135: if ($eval eq 'on') {
136: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
137: }
138: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
139: # detect simple math mode entry exits, and convert them
140: # to use \ensuremath ... unless there's a \verb inside.
141: if (! ($currentstring=~/\\verb/)) {
142: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
143: $currentstring=~s/^(\s*)\$/$1/;
144: $currentstring=~s/\$(\s*)$/$1/;
145: $currentstring='\ensuremath{'.$currentstring.'}';
146: }
147: }
148: $Apache::lonxml::post_evaluate=0;
149: }
150: return $currentstring;
151: }
152:
153: sub end_m {
154: my ($target,$token) = @_;
155: my $currentstring = '';
156: if ($target eq 'tex') {
157: $currentstring = "";
158: }
159: return $currentstring;
160: }
161:
162: sub start_tthoption {
163: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
164: my $result;
165: if ($target eq 'web' || $target eq 'webgrade') {
166: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
167: $style);
168: $inside=~s/^\s*//;
169: if ($env{'browser.mathml'}) {
170: &tth::ttmoptions($inside);
171: } else {
172: &tth::tthoptions($inside);
173: }
174: }
175: return $result;
176: }
177:
178: sub end_tthoption {
179: my ($target,$token) = @_;
180: my $result;
181: return $result;
182: }
183:
184: #-- <html> tag (end tag optional)
185: sub start_html {
186: my ($target,$token) = @_;
187: my $currentstring = '';
188: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
189: # start_body() takes care of emitting the <html>
190: } elsif ($target eq 'tex') {
191: $currentstring .=
192: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
193: if (($env{'form.latex_type'}=~'batchmode') ||
194: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
195: $currentstring .= '\newcommand{\keephidden}[1]{}'.
196: '\renewcommand{\deg}{$^{\circ}$}'.
197: '\usepackage{multirow}'.
198: '\usepackage{longtable}'.
199: '\usepackage{textcomp}'.
200: '\usepackage{makeidx}'.
201: '\usepackage[dvips]{graphicx}'.
202: '\usepackage{wrapfig}'.
203: '\usepackage{picins}'.
204: '\usepackage[T1]{fontenc}'."\n".
205: '\usepackage[postscript]{ucs}'."\n".
206: '\usepackage[utf8x]{inputenc}'."\n".
207: '\usepackage{pifont}' ."\n".
208: '\usepackage{latexsym}'."\n".
209: '\usepackage{epsfig}'.
210: '\usepackage{calc}'.
211: '\usepackage{amsmath}'.
212: '\usepackage{amssymb}'.
213: '\usepackage{amsfonts}'.
214: '\usepackage{amsthm}'.
215: '\usepackage{amscd}'.
216: '\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}}'.
217: '\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}}';
218: }
219: return $currentstring;
220: }
221:
222: sub end_html {
223: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
224: my $currentstring = '';
225: if ($target eq 'web' || $target eq 'webgrade') {
226: # end_body takes care of the </html>
227: }
228: return $currentstring;
229: }
230:
231: #-- <head> tag (end tag optional)
232: sub start_head {
233: my ($target,$token) = @_;
234: my $currentstring = '';
235: if ($target eq 'web' || $target eq 'webgrade') {
236: &Apache::lonxml::startredirection();
237: }
238: return $currentstring;
239: }
240:
241: sub end_head {
242: my ($target,$token) = @_;
243: my $currentstring = '';
244: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
245: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
246: # in case there is a </head> but no <head>
247: if ($Apache::lonxml::redirection) {
248: $Apache::londefdef::head = &Apache::lonxml::endredirection();
249: }
250: }
251: return $currentstring;
252: }
253:
254: #-- <map> tag (end tag required)
255: sub start_map {
256: my ($target,$token) = @_;
257: my $currentstring = '';
258: if ($target eq 'web' || $target eq 'webgrade') {
259: $currentstring = $token->[4];
260: }
261: return $currentstring;
262: }
263:
264: sub end_map {
265: my ($target,$token) = @_;
266: my $currentstring = '';
267: if ($target eq 'web' || $target eq 'webgrade') {
268: $currentstring = $token->[2];
269: }
270: return $currentstring;
271: }
272:
273: #-- <select> tag (end tag required)
274: sub start_select {
275: my ($target,$token) = @_;
276: my $currentstring = '';
277: if ($target eq 'web' || $target eq 'webgrade') {
278: $currentstring = $token->[4];
279: } elsif ($target eq 'tex') {
280: $Apache::londefdef::select=0;
281: }
282: return $currentstring;
283: }
284:
285: sub end_select {
286: my ($target,$token) = @_;
287: my $currentstring = '';
288: if ($target eq 'web' || $target eq 'webgrade') {
289: $currentstring = $token->[2];
290: }
291: return $currentstring;
292: }
293:
294: #-- <option> tag (end tag optional)
295: sub start_option {
296: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
297: my $currentstring = '';
298: if ($target eq 'web' || $target eq 'webgrade') {
299: $currentstring = $token->[4];
300: } elsif ($target eq 'tex') {
301: $Apache::londefdef::select++;
302: if ($Apache::londefdef::select == 1) {
303: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
304: } else {
305: $currentstring='\keephidden{';
306: }
307: }
308: return $currentstring;
309: }
310:
311: sub end_option {
312: my ($target,$token) = @_;
313: my $currentstring = '';
314: if ($target eq 'web' || $target eq 'webgrade') {
315: $currentstring = $token->[2];
316: } elsif ($target eq 'tex') {
317: $currentstring='}';
318: }
319: return $currentstring;
320: }
321:
322: #-- <input> tag (end tag forbidden)
323: sub start_input {
324: my ($target,$token) = @_;
325: my $currentstring = '';
326: if ($target eq 'web' || $target eq 'webgrade') {
327: $currentstring = $token->[4];
328: }
329: return $currentstring;
330: }
331:
332: sub end_input {
333: my ($target,$token) = @_;
334: my $currentstring = '';
335: if ($target eq 'web' || $target eq 'webgrade') {
336: $currentstring = $token->[2];
337: }
338: return $currentstring;
339: }
340:
341: #-- <textarea> tag (end tag required)
342: sub start_textarea {
343: my ($target,$token) = @_;
344: my $currentstring = '';
345: if ($target eq 'web' || $target eq 'webgrade') {
346: $currentstring = $token->[4];
347: }
348: return $currentstring;
349: }
350:
351: sub end_textarea {
352: my ($target,$token) = @_;
353: my $currentstring = '';
354: if ($target eq 'web' || $target eq 'webgrade') {
355: $currentstring = $token->[2];
356: }
357: return $currentstring;
358: }
359:
360: #-- <form> tag (end tag required)
361: sub start_form {
362: my ($target,$token) = @_;
363: my $currentstring = '';
364: if ($target eq 'web' || $target eq 'webgrade') {
365: $currentstring = $token->[4];
366: }
367: return $currentstring;
368: }
369:
370: sub end_form {
371: my ($target,$token) = @_;
372: my $currentstring = '';
373: if ($target eq 'web' || $target eq 'webgrade') {
374: $currentstring = $token->[2];
375: }
376: return $currentstring;
377: }
378:
379: #-- <title> tag (end tag required)
380: sub start_title {
381: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
382: my $currentstring = '';
383: if ($target eq 'web' || $target eq 'webgrade') {
384: $Apache::londefdef::title =
385: &Apache::lonxml::get_all_text('/title',$parser,$style);
386: } elsif ($target eq 'tex') {
387: $currentstring .= '\keephidden{Title of the document: '
388: }
389: if ($target eq 'meta') {
390: $currentstring='<title>';
391: &start_output($target);
392: }
393: return $currentstring;
394: }
395:
396: sub end_title {
397: my ($target,$token) = @_;
398: my $currentstring = '';
399: if ($target eq 'web' || $target eq 'webgrade') {
400: # start_title takes care of swallowing the title
401: } elsif ($target eq 'tex') {
402: $currentstring .= '}';
403: }
404: if ($target eq 'meta') {
405: &end_output($target);
406: $currentstring='</title>';
407: }
408: return $currentstring;
409: }
410:
411: #-- <meta> tag (end tag forbidden)
412: sub start_meta {
413: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
414: my $currentstring = '';
415: if ($target eq 'web' || $target eq 'webgrade') {
416: my $args='';
417: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
418: if ($args eq '') {
419: &Apache::lonxml::get_all_text("/meta",$parser,$style);
420: } else {
421: $currentstring = $token->[4];
422: }
423: } elsif ($target eq 'meta') {
424: unless (&Apache::lonxml::get_param
425: ('http-equiv',$parstack,$safeeval,undef,1)) {
426: my $name=$token->[2]->{'name'};
427: $name=~tr/A-Z/a-z/;
428: $name=~s/\s/\_/gs;
429: $name=~s/\W//gs;
430: if ($name) {
431: $currentstring='<'.$name;
432: my $display=&Apache::lonxml::get_param
433: ('display',$parstack,$safeeval,undef,1);
434: if ($display) {
435: $display=~s/\"/\'/g;
436: $currentstring.=' display="'.$display.'"';
437: }
438: $currentstring.='>'.
439: &Apache::lonxml::get_param
440: ('content',$parstack,$safeeval,undef,1).
441: '</'.$name.'>';
442: }
443: my $display=&Apache::lonxml::get_param
444: ('display',$parstack,$safeeval,undef,1);
445: if ($display) {
446: $display=&HTML::Entities::encode($display,'<>&"');
447: $currentstring.='<'.$name.'.display>'.$display.
448: '</'.$name.'.display>';
449: }
450: }
451: } elsif ($target eq 'tex') {
452: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
453: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
454: if ((not defined $content) && (not defined $name)) {
455: &Apache::lonxml::startredirection();
456: }
457: } elsif ($target eq 'edit') {
458: $currentstring .= &Apache::edit::tag_start($target,$token);
459: $currentstring .= &Apache::edit::text_arg('Name:','name',$token,30);
460: $currentstring .= &Apache::edit::text_arg('Content:','content',$token,70);
461: $currentstring .= &Apache::edit::end_row();
462: } elsif ($target eq 'modified') {
463: my $constructtag =
464: &Apache::edit::get_new_args($token,$parstack,$safeeval,
465: 'name','content');
466: if ($constructtag) { $currentstring = &Apache::edit::rebuild_tag($token); }
467: }
468: return $currentstring;
469: }
470:
471: sub end_meta {
472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
473: my $currentstring = '';
474: if ($target eq 'web' || $target eq 'webgrade') {
475: my $args='';
476: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
477: if ($args ne '') {
478: $currentstring = $token->[4];
479: }
480: } elsif ($target eq 'tex') {
481: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
482: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
483: if ((not defined $content) && (not defined $name)) {
484: &Apache::lonxml::endredirection();
485: }
486: }
487: return $currentstring;
488: }
489:
490: sub insert_meta {
491: return '
492: <meta />';
493: }
494:
495: # accessrule
496: sub start_accessrule {
497: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
498: my $currentstring = '';
499: my $eff =&Apache::lonxml::get_param('effect',$parstack,$safeeval,undef,1);
500: my $realm=&Apache::lonxml::get_param('realm', $parstack,$safeeval,undef,1);
501: my $role =&Apache::lonxml::get_param('role', $parstack,$safeeval,undef,1);
502: my $type =&Apache::lonxml::get_param('type', $parstack,$safeeval,undef,1);
503:
504: my ($dom,$crs,$sec,$separator);
505: if ($type eq 'user') {
506: ($dom,$crs,$sec)=split(m{/},$realm);
507: $crs = &LONCAPA::clean_username($crs);
508: $separator = '/';
509: } else {
510: ($dom,$crs,$sec)=split(/\_/,$realm);
511: $crs = &LONCAPA::clean_courseid($crs);
512: $separator = '_';
513: }
514: $dom = &LONCAPA::clean_domain($dom);
515:
516: $sec =~s/\W//;
517: $realm = $dom;
518: if ($crs =~ /\S/) { $realm .= $separator.$crs; }
519: if ($sec =~ /\S/) { $realm .= $separator.$sec; }
520: $role=~s/\W//g;
521:
522: if ($target eq 'web') {
523: my $args='';
524: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
525: if ($args eq '') {
526: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
527: } else {
528: $currentstring = $token->[4];
529: }
530: }
531: if ($target eq 'meta') {
532: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
533: }
534: return $currentstring;
535: }
536:
537: sub end_accessrule {
538: my ($target,$token,$tagstack,$parstack,$parser) = @_;
539: my $currentstring = '';
540: if ($target eq 'web') {
541: my $args='';
542: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
543: if ($args ne '') {
544: $currentstring = $token->[4];
545: }
546: }
547: return $currentstring;
548: }
549:
550: sub generate_css_links {
551: my $links;
552: my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
553: if ($css_href =~ /\S/) {
554: &Apache::lonxml::extlink($css_href);
555: $links .=
556: '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
557: }
558: return $links;
559: }
560:
561: #-- <body> tag (end tag required)
562: sub start_body {
563: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
564: my $currentstring = '';
565:
566: if ($target eq 'web' || $target eq 'webgrade') {
567: if ($Apache::lonhomework::parsing_a_problem) {
568: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
569: return '';
570: }
571:
572: if (&is_inside_of($tagstack, "head")) {
573: &end_head(@_);
574: }
575:
576: my $extra_head = &generate_css_links();
577:
578: $currentstring =
579: &Apache::loncommon::start_page($Apache::londefdef::title,
580: $Apache::londefdef::head
581: .$extra_head,
582: {'add_entries' => $token->[2],
583: 'no_title' => 1,
584: 'force_register' => 1});
585:
586: if ($env{'request.state'} ne 'published') {
587: $currentstring.=&Apache::lonmenu::constspaceform();
588: $currentstring.=&Apache::londefdef::edit_controls();
589: }
590: $currentstring.=&Apache::lonxml::message_location();
591: } elsif ($target eq 'tex') {
592: $currentstring = '\begin{document}';
593: }
594: return $currentstring;
595: }
596:
597: sub edit_controls {
598: my $result .= '
599: <form method="post">
600: <div class="LC_edit_problem_header">
601: <div class="LC_edit_problem_header_row1">'.
602: &Apache::lonxml::renderingoptions().'
603: <input type="submit" name="changeproblemmode" value="'.&mt('Change View').'" />
604: </div>
605: <div class="LC_edit_problem_header_edit_row"><input type="submit" name="editmode" accesskey="e" value="Edit" /></div></div>
606: </form>
607: <br />';
608: return $result;
609: }
610:
611: sub end_body {
612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
613: my $currentstring = &end_p(); # Close off unclosed <p>
614: if ($target eq 'web' || $target eq 'webgrade') {
615: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
616: } elsif ($target eq 'tex') {
617: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
618: }
619: return $currentstring;
620: }
621:
622: # \begin{center} causes a new paragprah spacing that looks odd inside
623: # of a table cell. Same at the end of a \center but with a slightly
624: # larger space .. hence center_correction and center_end_correction.
625: #
626: sub center_correction { return '\vspace*{-6 mm}'; }
627: sub center_end_correction { return '\vspace*{-7 mm}'; }
628:
629: #-- <center> tag (end tag required)
630: sub start_center {
631: my ($target,$token,$tagstack) = @_;
632: my $currentstring = &end_p(); # Close off any prior para.
633: if ($target eq 'web' || $target eq 'webgrade') {
634: $currentstring .= $token->[4];
635: } elsif ($target eq 'tex') {
636: if (&is_inside_of($tagstack, "table")) {
637: $currentstring .= ¢er_correction();
638: }
639: $currentstring .= '\begin{center}';
640: }
641: return $currentstring;
642: }
643:
644: sub end_center {
645: my ($target,$token,$tagstack) = @_;
646: my $currentstring = '';
647: if ($target eq 'web' || $target eq 'webgrade') {
648: $currentstring = $token->[2];
649: } elsif ($target eq 'tex') {
650: $currentstring = '\end{center}';
651: if (&is_inside_of($tagstack, "table")) {
652: $currentstring .= ¢er_end_correction();
653: }
654: }
655: return $currentstring;
656: }
657:
658: #-- <b> tag (end tag required)
659: # NOTE: In TeX mode disables internal <p>
660: sub start_b {
661: my ($target,$token) = @_;
662: my $currentstring = '';
663: if ($target eq 'web' || $target eq 'webgrade') {
664: $currentstring = $token->[4];
665: } elsif ($target eq 'tex') {
666: &disable_para();
667: $currentstring .= '\textbf{';
668: }
669: return $currentstring;
670: }
671:
672: sub end_b {
673: my ($target,$token) = @_;
674: my $currentstring = '';
675: if ($target eq 'web' || $target eq 'webgrade') {
676: $currentstring = $token->[2];
677: } elsif ($target eq 'tex') {
678: &enable_para();
679: $currentstring = '}';
680: }
681: return $currentstring;
682: }
683:
684: #-- <strong> tag (end tag required)
685: # NOTE: in TeX mode disables internal <p>
686: sub start_strong {
687: my ($target,$token) = @_;
688: my $currentstring = '';
689: if ($target eq 'web' || $target eq 'webgrade') {
690: $currentstring = $token->[4];
691: } elsif ($target eq 'tex') {
692: &disable_para();
693: $currentstring = '\textbf{';
694: }
695: return $currentstring;
696: }
697:
698: sub end_strong {
699: my ($target,$token) = @_;
700: my $currentstring = '';
701: if ($target eq 'web' || $target eq 'webgrade') {
702: $currentstring = $token->[2];
703: } elsif ($target eq 'tex') {
704: &enable_para();
705: $currentstring = '}';
706: }
707: return $currentstring;
708: }
709:
710: #-- <h1> tag (end tag required)
711: sub start_h1 {
712: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
713: my $currentstring = &end_p(); # Close off any prior para.
714: if ($target eq 'web' || $target eq 'webgrade') {
715: $currentstring .= $token->[4];
716: } elsif ($target eq 'tex') {
717: my $pre;
718: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
719: if ($align eq 'center') {
720: $pre='\begin{center}';
721: } elsif ($align eq 'left') {
722: $pre='\rlap{';
723: } elsif ($align eq 'right') {
724: $pre=' \hfill \llap{';
725: }
726: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
727: if (not defined $TeXsize) {$TeXsize="large";}
728: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
729: } elsif ($target eq 'meta') {
730: $currentstring.='<subject>';
731: &start_output($target);
732: }
733: return $currentstring;
734: }
735:
736: sub end_h1 {
737: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
738: my $currentstring = '';
739: if ($target eq 'web' || $target eq 'webgrade') {
740: $currentstring .= $token->[2];
741: } elsif ($target eq 'tex') {
742: my $post='\vskip 0 mm ';
743: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
744: if ($align eq 'center') {
745: $post='\end{center}';
746: } elsif ($align eq 'left') {
747: $post='} \hfill'.'\vskip 0 mm ';
748: } elsif ($align eq 'right') {
749: $post='}'.'\vskip 0 mm ';
750: }
751: $currentstring .= '}}'.$post;
752: } elsif ($target eq 'meta') {
753: &end_output($target);
754: $currentstring='</subject>';
755: }
756: return $currentstring;
757: }
758:
759: #-- <h2> tag
760: sub start_h2 {
761: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
762: my $currentstring = &end_p(); # Close off any prior para.
763: if ($target eq 'web' || $target eq 'webgrade') {
764: $currentstring .= $token->[4];
765: } elsif ($target eq 'tex') {
766: my $pre;
767: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
768: if ($align eq 'center') {
769: $pre='\begin{center}';
770: } elsif ($align eq 'left') {
771: $pre='\rlap{';
772: } elsif ($align eq 'right') {
773: $pre=' \hfill \llap{';
774: }
775: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
776: if (not defined $TeXsize) {$TeXsize="large";}
777: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
778: }
779: return $currentstring;
780: }
781:
782: sub end_h2 {
783: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
784: my $currentstring = '';
785: if ($target eq 'web' || $target eq 'webgrade') {
786: $currentstring .= $token->[2];
787: } elsif ($target eq 'tex') {
788: my $post='\vskip 0 mm ';
789: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
790: if ($align eq 'center') {
791: $post='\end{center}';
792: } elsif ($align eq 'left') {
793: $post='} \hfill'.'\vskip 0 mm ';
794: } elsif ($align eq 'right') {
795: $post='}'.'\vskip 0 mm ';
796: }
797: $currentstring .= '}}'.$post;
798: }
799: return $currentstring;
800: }
801:
802: #-- <h3> tag
803: sub start_h3 {
804: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
805: my $currentstring = &end_p(); # Close off any prior para.
806: if ($target eq 'web' || $target eq 'webgrade') {
807: $currentstring .= $token->[4];
808: } elsif ($target eq 'tex') {
809: my $pre;
810: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
811: if ($align eq 'center') {
812: $pre='\begin{center}';
813: } elsif ($align eq 'left') {
814: $pre='\rlap{';
815: } elsif ($align eq 'right') {
816: $pre=' \hfill \llap{';
817: }
818: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
819: if (not defined $TeXsize) {$TeXsize="large";}
820: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
821: }
822: return $currentstring;
823: }
824:
825: sub end_h3 {
826: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
827: my $currentstring = '';
828: if ($target eq 'web' || $target eq 'webgrade') {
829: $currentstring .= $token->[2];
830: } elsif ($target eq 'tex') {
831: my $post='\vskip 0 mm ';
832: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
833: if ($align eq 'center') {
834: $post='\end{center}';
835: } elsif ($align eq 'left') {
836: $post='} \hfill'.'\vskip 0 mm ';
837: } elsif ($align eq 'right') {
838: $post='}'.'\vskip 0 mm ';
839: }
840: $currentstring .= '}}'.$post;
841: }
842: return $currentstring;
843: }
844:
845: #-- <h4> tag
846: sub start_h4 {
847: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
848: my $currentstring = &end_p(); # Close off any prior para.
849: if ($target eq 'web' || $target eq 'webgrade') {
850: $currentstring .= $token->[4];
851: } elsif ($target eq 'tex') {
852: my $pre;
853: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
854: if ($align eq 'center') {
855: $pre='\begin{center}';
856: } elsif ($align eq 'left') {
857: $pre='\rlap{';
858: } elsif ($align eq 'right') {
859: $pre=' \hfill \llap{';
860: }
861: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
862: if (not defined $TeXsize) {$TeXsize="large";}
863: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
864: }
865: return $currentstring;
866: }
867:
868: sub end_h4 {
869: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
870: my $currentstring = '';
871: if ($target eq 'web' || $target eq 'webgrade') {
872: $currentstring .= $token->[2];
873: } elsif ($target eq 'tex') {
874: my $post='\vskip 0 mm ';
875: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
876: if ($align eq 'center') {
877: $post='\end{center}';
878: } elsif ($align eq 'left') {
879: $post='} \hfill'.'\vskip 0 mm ';
880: } elsif ($align eq 'right') {
881: $post='}'.'\vskip 0 mm ';
882: }
883: $currentstring .= '}}'.$post;
884: }
885: return $currentstring;
886: }
887:
888: #-- <h5> tag
889: sub start_h5 {
890: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
891: my $currentstring = &end_p(); # Close off any prior paras.
892: if ($target eq 'web' || $target eq 'webgrade') {
893: $currentstring .= $token->[4];
894: } elsif ($target eq 'tex') {
895: my $pre;
896: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
897: if ($align eq 'center') {
898: $pre='\begin{center}';
899: } elsif ($align eq 'left') {
900: $pre='\rlap{';
901: } elsif ($align eq 'right') {
902: $pre=' \hfill \llap{';
903: }
904: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
905: if (not defined $TeXsize) {$TeXsize="large";}
906: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
907: }
908: return $currentstring;
909: }
910:
911: sub end_h5 {
912: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
913: my $currentstring = '';
914: if ($target eq 'web' || $target eq 'webgrade') {
915: $currentstring .= $token->[2];
916: } elsif ($target eq 'tex') {
917: my $post='\vskip 0 mm ';
918: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
919: if ($align eq 'center') {
920: $post='\end{center}';
921: } elsif ($align eq 'left') {
922: $post='} \hfill'.'\vskip 0 mm ';
923: } elsif ($align eq 'right') {
924: $post='}'.'\vskip 0 mm ';
925: }
926: $currentstring .= '}}'.$post;
927: }
928: return $currentstring;
929: }
930:
931: #-- <h6> tag
932: sub start_h6 {
933: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
934: my $currentstring = &end_p(); # Close off any prior paras.
935: if ($target eq 'web' || $target eq 'webgrade') {
936: $currentstring .= $token->[4];
937: } elsif ($target eq 'tex') {
938: my $pre;
939: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
940: if ($align eq 'center') {
941: $pre='\begin{center}';
942: } elsif ($align eq 'left') {
943: $pre='\rlap{';
944: } elsif ($align eq 'right') {
945: $pre=' \hfill \llap{';
946: }
947: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
948: if (not defined $TeXsize) {$TeXsize="large";}
949: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
950: }
951: return $currentstring;
952: }
953:
954: sub end_h6 {
955: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
956: my $currentstring = '';
957: if ($target eq 'web' || $target eq 'webgrade') {
958: $currentstring .= $token->[2];
959: } elsif ($target eq 'tex') {
960: my $post='\vskip 0 mm ';
961: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
962: if ($align eq 'center') {
963: $post='\end{center}';
964: } elsif ($align eq 'left') {
965: $post='} \hfill'.'\vskip 0 mm ';
966: } elsif ($align eq 'right') {
967: $post='}'.'\vskip 0 mm ';
968: }
969: $currentstring .= '}}'.$post;
970: }
971: return $currentstring;
972: }
973:
974: #--- <cite> tag (end tag required)
975: sub start_cite {
976: my ($target,$token) = @_;
977: my $currentstring = '';
978: if ($target eq 'web' || $target eq 'webgrade') {
979: $currentstring .= $token->[4];
980: } elsif ($target eq 'tex') {
981: $currentstring .= '\textit{';
982: }
983: return $currentstring;
984: }
985:
986: sub end_cite {
987: my ($target,$token) = @_;
988: my $currentstring = '';
989: if ($target eq 'web' || $target eq 'webgrade') {
990: $currentstring .= $token->[2];
991: } elsif ($target eq 'tex') {
992: $currentstring .= '}';
993: }
994: return $currentstring;
995: }
996:
997: #-- <i> tag (end tag required)
998: sub start_i {
999: my ($target,$token) = @_;
1000: my $currentstring = '';
1001: if ($target eq 'web' || $target eq 'webgrade') {
1002: $currentstring .= $token->[4];
1003: } elsif ($target eq 'tex') {
1004: $currentstring .= '\textit{';
1005: }
1006: return $currentstring;
1007: }
1008:
1009: sub end_i {
1010: my ($target,$token) = @_;
1011: my $currentstring = '';
1012: if ($target eq 'web' || $target eq 'webgrade') {
1013: $currentstring .= $token->[2];
1014: } elsif ($target eq 'tex') {
1015: $currentstring .= '}';
1016: }
1017: return $currentstring;
1018: }
1019:
1020: #-- <address> tag (end tag required)
1021: sub start_address {
1022: my ($target,$token) = @_;
1023: my $currentstring = '';
1024: if ($target eq 'web' || $target eq 'webgrade') {
1025: $currentstring .= $token->[4];
1026: } elsif ($target eq 'tex') {
1027: $currentstring .= '\textit{';
1028: }
1029: return $currentstring;
1030: }
1031:
1032: sub end_address {
1033: my ($target,$token) = @_;
1034: my $currentstring = '';
1035: if ($target eq 'web' || $target eq 'webgrade') {
1036: $currentstring .= $token->[2];
1037: } elsif ($target eq 'tex') {
1038: $currentstring .= '}';
1039: }
1040: return $currentstring;
1041: }
1042:
1043: #-- <dfn> tag (end tag required)
1044: sub start_dfn {
1045: my ($target,$token) = @_;
1046: my $currentstring = '';
1047: if ($target eq 'web' || $target eq 'webgrade') {
1048: $currentstring .= $token->[4];
1049: } elsif ($target eq 'tex') {
1050: $currentstring .= '\textit{';
1051: }
1052: return $currentstring;
1053: }
1054:
1055: sub end_dfn {
1056: my ($target,$token) = @_;
1057: my $currentstring = '';
1058: if ($target eq 'web' || $target eq 'webgrade') {
1059: $currentstring .= $token->[2];
1060: } elsif ($target eq 'tex') {
1061: $currentstring .= '}';
1062: }
1063: return $currentstring;
1064: }
1065:
1066: #-- <tt> tag (end tag required)
1067: sub start_tt {
1068: my ($target,$token) = @_;
1069: my $currentstring = '';
1070: if ($target eq 'web' || $target eq 'webgrade') {
1071: $currentstring .= $token->[4];
1072: } elsif ($target eq 'tex') {
1073: $currentstring .= '\texttt{';
1074: }
1075: return $currentstring;
1076: }
1077:
1078: sub end_tt {
1079: my ($target,$token) = @_;
1080: my $currentstring = '';
1081: if ($target eq 'web' || $target eq 'webgrade') {
1082: $currentstring .= $token->[2];
1083: } elsif ($target eq 'tex') {
1084: $currentstring .= '}';
1085: }
1086: return $currentstring;
1087: }
1088:
1089: #-- <kbd> tag (end tag required)
1090: sub start_kbd {
1091: my ($target,$token) = @_;
1092: my $currentstring = '';
1093: if ($target eq 'web' || $target eq 'webgrade') {
1094: $currentstring .= $token->[4];
1095: } elsif ($target eq 'tex') {
1096: $currentstring .= '\texttt{';
1097: }
1098: return $currentstring;
1099: }
1100:
1101: sub end_kbd {
1102: my ($target,$token) = @_;
1103: my $currentstring = '';
1104: if ($target eq 'web' || $target eq 'webgrade') {
1105: $currentstring .= $token->[2];
1106: } elsif ($target eq 'tex') {
1107: $currentstring .= '}';
1108: }
1109: return $currentstring;
1110: }
1111:
1112: #-- <code> tag (end tag required)
1113: sub start_code {
1114: my ($target,$token) = @_;
1115: my $currentstring = '';
1116: if ($target eq 'web' || $target eq 'webgrade') {
1117: $currentstring .= $token->[4];
1118: } elsif ($target eq 'tex') {
1119: $currentstring .= '\texttt{';
1120: }
1121: return $currentstring;
1122: }
1123:
1124: sub end_code {
1125: my ($target,$token) = @_;
1126: my $currentstring = '';
1127: if ($target eq 'web' || $target eq 'webgrade') {
1128: $currentstring .= $token->[2];
1129: } elsif ($target eq 'tex') {
1130: $currentstring .= '}';
1131: }
1132: return $currentstring;
1133: }
1134:
1135: #-- <em> tag (end tag required)
1136: sub start_em {
1137: my ($target,$token) = @_;
1138: my $currentstring = '';
1139: if ($target eq 'web' || $target eq 'webgrade') {
1140: $currentstring .= $token->[4];
1141: } elsif ($target eq 'tex') {
1142: $currentstring .= '\emph{';
1143: }
1144: return $currentstring;
1145: }
1146:
1147: sub end_em {
1148: my ($target,$token) = @_;
1149: my $currentstring = '';
1150: if ($target eq 'web' || $target eq 'webgrade') {
1151: $currentstring .= $token->[2];
1152: } elsif ($target eq 'tex') {
1153: $currentstring .= '}';
1154: }
1155: return $currentstring;
1156: }
1157:
1158: #-- <q> tag (end tag required)
1159: sub start_q {
1160: my ($target,$token) = @_;
1161: my $currentstring = '';
1162: if ($target eq 'web' || $target eq 'webgrade') {
1163: $currentstring .= $token->[4];
1164: } elsif ($target eq 'tex') {
1165: $currentstring .= '\emph{';
1166: }
1167: return $currentstring;
1168: }
1169:
1170: sub end_q {
1171: my ($target,$token) = @_;
1172: my $currentstring = '';
1173: if ($target eq 'web' || $target eq 'webgrade') {
1174: $currentstring .= $token->[2];
1175: } elsif ($target eq 'tex') {
1176: $currentstring .= '}';
1177: }
1178: return $currentstring;
1179: }
1180:
1181: # <p> is a bit strange since it does not require a closing </p>
1182: # However in latex, we must often output closing stuff to end
1183: # environments and {}'s etc. Therefore we do all the work
1184: # of figuring out the ending strings in the start tag processing,
1185: # and provide a mechanism to output the stop text external
1186: # to tag processing.
1187: #
1188: {
1189:
1190: my $closing_string = ''; # String required to close <p>
1191:
1192: # Some tags are <p> fragile meaning that <p> inside of them
1193: # does not work within TeX mode. This is managed via the
1194: # counter below:
1195: #
1196:
1197: my $para_disabled = 0;
1198:
1199: sub disable_para {
1200: $para_disabled++;
1201: }
1202: sub enable_para {
1203: $para_disabled--;
1204: }
1205:
1206:
1207: #-- <p> tag (end tag optional)
1208: #optional attribute - align="center|left|right"
1209: sub start_p {
1210: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1211: my $currentstring = '';
1212: if ($target eq 'web' || $target eq 'webgrade') {
1213: $currentstring .= &end_p(); # close off prior para if in progress.
1214: $currentstring .= $token->[4];
1215: if (! ($currentstring =~ /\//)) {
1216: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1217: }
1218: } elsif ($target eq 'tex' && !$para_disabled) {
1219:
1220: $currentstring .= &end_p(); # close off prior para if in progress.
1221: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1222: if ($align eq 'center') {
1223: $currentstring .='\begin{center}\par ';
1224: $closing_string = '\end{center}';
1225: if (&is_inside_of($tagstack, "table")) {
1226: $currentstring = ¢er_correction().$currentstring;
1227: }
1228: } elsif ($align eq 'right') {
1229: $currentstring.="\n".'{\flushright ';
1230: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1231: $closing_string= "}\n";
1232: } elsif ($align eq 'left') {
1233: $currentstring.= "\n".'{\flushleft ';
1234: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1235: $closing_string = "}\n";
1236: } else {
1237: $currentstring.='\par ';
1238: if (&is_inside_of($tagstack, 'table')) {
1239: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1240: } else {
1241: $closing_string = '\strut\\\\\strut ';
1242: }
1243: }
1244:
1245: }
1246: return $currentstring;
1247: }
1248: #
1249: # End paragraph processing just requires that we output the
1250: # closing string that was saved and blank it.
1251: sub end_p {
1252: # Note only 'tex' mode uses disable_para and enable_para
1253: # so we don't need to know the target in the check below:
1254:
1255: if (!$para_disabled) {
1256: my $current_string = $closing_string;
1257: $closing_string = ''; # Not in a para anymore.
1258: return $current_string;
1259: } else {
1260: return '';
1261: }
1262:
1263: }
1264: }
1265: #-- <br> tag (end tag forbidden)
1266: sub start_br {
1267: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1268: my $currentstring = '';
1269: if ($target eq 'web' || $target eq 'webgrade') {
1270: $currentstring .= $token->[4];
1271: } elsif ($target eq 'tex') {
1272: my @tempo=@$tagstack;
1273: my $signal=0;
1274: # Not going to factor this to is_inside_of since that would require
1275: # multiple stack traversals.
1276: #
1277: for (my $i=$#tempo;$i>=0;$i--) {
1278: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1279: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1280: $signal=1;
1281: }
1282: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1283: $signal = 1;
1284: }
1285: }
1286: if ($signal != 1) {
1287: $currentstring .= '\strut \\\\ \strut ';
1288: }
1289:
1290: }
1291: return $currentstring;
1292: }
1293:
1294: sub end_br {
1295: my ($target,$token) = @_;
1296: my $currentstring = '';
1297: if ($target eq 'web' || $target eq 'webgrade') {
1298: $currentstring .= $token->[2];
1299: }
1300: return $currentstring;
1301: }
1302:
1303: #-- <big> tag (end tag required)
1304: sub start_big {
1305: my ($target,$token) = @_;
1306: my $currentstring = '';
1307: if ($target eq 'web' || $target eq 'webgrade') {
1308: $currentstring .= $token->[4];
1309: } elsif ($target eq 'tex') {
1310: $currentstring .= '{\large ';
1311: }
1312: return $currentstring;
1313: }
1314:
1315: sub end_big {
1316: my ($target,$token) = @_;
1317: my $currentstring = '';
1318: if ($target eq 'web' || $target eq 'webgrade') {
1319: $currentstring .= $token->[2];
1320: } elsif ($target eq 'tex') {
1321: $currentstring .= '}';
1322: }
1323: return $currentstring;
1324: }
1325:
1326: #-- <small> tag (end tag required)
1327: sub start_small {
1328: my ($target,$token) = @_;
1329: my $currentstring = '';
1330: if ($target eq 'web' || $target eq 'webgrade') {
1331: $currentstring .= $token->[4];
1332: } elsif ($target eq 'tex') {
1333: $currentstring .= '{\footnotesize ';
1334: }
1335: return $currentstring;
1336: }
1337:
1338: sub end_small {
1339: my ($target,$token) = @_;
1340: my $currentstring = '';
1341: if ($target eq 'web' || $target eq 'webgrade') {
1342: $currentstring .= $token->[2];
1343: } elsif ($target eq 'tex') {
1344: $currentstring .= '}';
1345: }
1346: return $currentstring;
1347: }
1348:
1349: #-- <basefont> tag (end tag forbidden)
1350: sub start_basefont {
1351: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1352: my $currentstring = '';
1353: if ($target eq 'web' || $target eq 'webgrade') {
1354: $currentstring = $token->[4];
1355: } elsif ($target eq 'tex') {
1356: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1357: if (defined $basesize) {
1358: $currentstring = '{\\'.$basesize.' ';
1359: }
1360: }
1361: return $currentstring;
1362: }
1363:
1364: sub end_basefont {
1365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1366: my $currentstring = '';
1367: if ($target eq 'web' || $target eq 'webgrade') {
1368: $currentstring = $token->[4];
1369: } elsif ($target eq 'tex') {
1370: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1371: if (defined $basesize) {
1372: $currentstring = '}';
1373: }
1374: }
1375: return $currentstring;
1376: }
1377:
1378: #-- <font> tag (end tag required)
1379: sub start_font {
1380: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1381: my $currentstring = '';
1382: if ($target eq 'web' || $target eq 'webgrade') {
1383: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1384: if ($face!~/symbol/i) {
1385: if (($env{'browser.fontenhance'} eq 'on') ||
1386: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1387: }
1388: $currentstring = $token->[4];
1389: } elsif ($target eq 'tex') {
1390: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1391: if (defined $fontsize) {
1392: $currentstring = '{\\'.$fontsize.' ';
1393: }
1394: }
1395: return $currentstring;
1396: }
1397:
1398: sub end_font {
1399: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1400: my $currentstring = '';
1401: if ($target eq 'web' || $target eq 'webgrade') {
1402: $currentstring = $token->[2];
1403: } elsif ($target eq 'tex') {
1404: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1405: if (defined $fontsize) {
1406: $currentstring = '}';
1407: }
1408: }
1409: return $currentstring;
1410: }
1411:
1412: #-- <strike> tag (end tag required)
1413: sub start_strike {
1414: my ($target,$token) = @_;
1415: my $currentstring = '';
1416: if ($target eq 'web' || $target eq 'webgrade') {
1417: $currentstring .= $token->[4];
1418: } elsif ($target eq 'tex') {
1419: &Apache::lonxml::startredirection();
1420: }
1421: return $currentstring;
1422: }
1423:
1424: sub end_strike {
1425: my ($target,$token) = @_;
1426: my $currentstring = '';
1427: if ($target eq 'web' || $target eq 'webgrade') {
1428: $currentstring .= $token->[2];
1429: } elsif ($target eq 'tex') {
1430: $currentstring=&Apache::lonxml::endredirection();
1431: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1432: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1433: $currentstring=~s/(\S)\s*$/$1\}/;
1434: }
1435: return $currentstring;
1436: }
1437:
1438: #-- <s> tag (end tag required)
1439: sub start_s {
1440: my ($target,$token) = @_;
1441: my $currentstring = '';
1442: if ($target eq 'web' || $target eq 'webgrade') {
1443: $currentstring .= $token->[4];
1444: } elsif ($target eq 'tex') {
1445: &Apache::lonxml::startredirection();
1446: }
1447: return $currentstring;
1448: }
1449:
1450: sub end_s {
1451: my ($target,$token) = @_;
1452: my $currentstring = '';
1453: if ($target eq 'web' || $target eq 'webgrade') {
1454: $currentstring .= $token->[2];
1455: } elsif ($target eq 'tex') {
1456: $currentstring=&Apache::lonxml::endredirection();
1457: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1458: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1459: $currentstring=~s/(\S)\s*$/$1\}/;
1460: }
1461: return $currentstring;
1462: }
1463:
1464: #-- <sub> tag (end tag required)
1465: sub start_sub {
1466: my ($target,$token) = @_;
1467: my $currentstring = '';
1468: if ($target eq 'web' || $target eq 'webgrade') {
1469: $currentstring .= $token->[4];
1470: } elsif ($target eq 'tex') {
1471: $currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1472: }
1473: return $currentstring;
1474: }
1475:
1476: sub end_sub {
1477: my ($target,$token) = @_;
1478: my $currentstring = '';
1479: if ($target eq 'web' || $target eq 'webgrade') {
1480: $currentstring .= $token->[2];
1481: } elsif ($target eq 'tex') {
1482: $currentstring .= '}}';
1483: }
1484: return $currentstring;
1485: }
1486:
1487: #-- <sup> tag (end tag required)
1488: sub start_sup {
1489: my ($target,$token) = @_;
1490: my $currentstring = '';
1491: if ($target eq 'web' || $target eq 'webgrade') {
1492: $currentstring .= $token->[4];
1493: } elsif ($target eq 'tex') {
1494: $currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1495: }
1496: return $currentstring;
1497: }
1498:
1499: sub end_sup {
1500: my ($target,$token) = @_;
1501: my $currentstring = '';
1502: if ($target eq 'web' || $target eq 'webgrade') {
1503: $currentstring .= $token->[2];
1504: } elsif ($target eq 'tex') {
1505: $currentstring .= '}}';
1506: }
1507: return $currentstring;
1508: }
1509:
1510: #-- <hr> tag (end tag forbidden)
1511: sub start_hr {
1512: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1513: my $currentstring = &end_p(); # End enclosing para.
1514: if ($target eq 'web' || $target eq 'webgrade') {
1515: $currentstring .= $token->[4];
1516: } elsif ($target eq 'tex') {
1517:
1518: # <hr /> can't be inside of <sup><sub> thank you LaTeX.
1519: #
1520: my $restart_sub = 0;
1521: my $restart_sup = 0;
1522:
1523: # Since <sub> and <sup> are simple tags it's ok to turn off/on
1524: # using the start_ stop_ functions.. those tags only care about
1525: # $target.
1526:
1527: if (&is_inside_of($tagstack, "sub")) {
1528: $restart_sub = 1;
1529: $currentstring .= &end_sub($target, $token, $tagstack,
1530: $parstack, $parser, $safeeval);
1531: }
1532: if (&is_inside_of($tagstack, "sup")) {
1533: $restart_sup = 1;
1534: $currentstring .= &end_sup($target, $token, $tagstack,
1535: $parstack, $parser, $safeeval);
1536: }
1537:
1538: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1539: if (defined $LaTeXwidth) {
1540: if ($LaTeXwidth=~/^%/) {
1541: substr($LaTeXwidth,0,1)='';
1542: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1543: }
1544: } else {
1545: $LaTeXwidth ='0.9\textwidth';
1546: }
1547: my ($pre,$post);
1548: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1549: if (($align eq 'center') || (not defined $align)) {
1550: $pre=''; $post='';
1551: } elsif ($align eq 'left') {
1552: $pre='\rlap{'; $post='} \hfill';
1553: } elsif ($align eq 'right') {
1554: $pre=' \hfill \llap{'; $post='}';
1555: }
1556: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1557: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1558: # Turn stuff back on that we can't be inside of.
1559:
1560: if ($restart_sub) {
1561: $currentstring .= &start_sub($target, $token, $tagstack,
1562: $parstack, $parser, $safeeval);
1563: }
1564: if ($restart_sup) {
1565: $currentstring .= &start_sup($target, $token, $tagstack,
1566: $parstack, $parser, $safeeval);
1567: }
1568: }
1569: return $currentstring;
1570: }
1571:
1572: sub end_hr {
1573: my ($target,$token) = @_;
1574: my $currentstring = '';
1575: if ($target eq 'web' || $target eq 'webgrade') {
1576: $currentstring .= $token->[2];
1577: }
1578: return $currentstring;
1579: }
1580:
1581: #-- <div> tag (end tag required)
1582: {
1583:
1584: # Since div can be nested, the stack below is used
1585: # in 'tex' mode to store the ending strings
1586: # for the div stack.
1587:
1588: my @div_end_stack;
1589:
1590: sub start_div {
1591: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1592: my $currentstring = &end_p(); # Close enclosing para.
1593: if ($target eq 'web' || $target eq 'webgrade') {
1594: $currentstring .= $token->[4];
1595: }
1596: if ($target eq 'tex') {
1597: # 4 possible alignments: left, right, center, and -missing-.
1598: # If inside a table row, we must let the table logic
1599: # do the alignment, however.
1600: #
1601:
1602: my $endstring = '';
1603:
1604: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1605: $safeeval, undef, 1));
1606: if ($align eq 'center') {
1607: $currentstring .= '\begin{center}';
1608: $endstring = '\end{center}';
1609: if (&is_inside_of($tagstack, "table")) {
1610: $currentstring = ¢er_correction().$currentstring;
1611: $endstring .= ¢er_end_correction();
1612: }
1613: }
1614: elsif ($align eq 'right') {
1615: $currentstring .= '\begin{flushright}';
1616: $endstring .= '\end{flushright}';
1617: } elsif ($align eq 'left') {
1618: $currentstring .= '\begin{flushleft}';
1619: $endstring = '\end{flushleft}';
1620: } else {
1621:
1622: }
1623: $currentstring .= "\n"; # For human readability.
1624: $endstring = "\n$endstring\n"; # For human readability
1625: push(@div_end_stack, $endstring);
1626: }
1627: return $currentstring;
1628: }
1629:
1630: sub end_div {
1631: my ($target,$token) = @_;
1632: my $currentstring = '';
1633: if ($target eq 'web' || $target eq 'webgrade') {
1634: $currentstring .= $token->[2];
1635: }
1636: if ($target eq 'tex') {
1637: my $endstring = pop @div_end_stack;
1638: $currentstring .= $endstring;
1639: }
1640: return $currentstring;
1641: }
1642: }
1643:
1644: #-- <a> tag (end tag required)
1645: sub start_a {
1646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1647: my $currentstring = '';
1648: if ($target eq 'web' || $target eq 'webgrade') {
1649: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1650: undef,1);
1651: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1652: }
1653: return $currentstring;
1654: }
1655:
1656: sub end_a {
1657: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1658: my $currentstring = '';
1659: if ($target eq 'web' || $target eq 'webgrade') {
1660: $currentstring .= $token->[2];
1661: }
1662: if ($target eq 'tex') {
1663: my $href =
1664: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1665: my $name =
1666: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1667: my $uriprint =
1668: &Apache::lonxml::get_param('uriprint',$parstack,$safeeval,undef,1);
1669: my $anchorprint =
1670: &Apache::lonxml::get_param('anchorprint',$parstack,$safeeval,undef,1);
1671: if (($href =~ /\S/) && ($uriprint=~/^on|uriprint|yes|1$/i)) {
1672: $href =~ s/([^\\])%/$1\\\%/g;
1673: # Substitute special symbols... and allow line breaks at each /
1674: #
1675: $href = &Apache::lonxml::latex_special_symbols($href);
1676: $href =~ s/\//\/\\-/g; # Map / to /\- to allow hyphenation.
1677: $currentstring .= ' ({\tt URI:'.$href.'})';
1678: } elsif (($name =~ /\S/) && ($anchorprint=~/^on|anchorprint|yes|1$/i)) {
1679: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1680: } else {
1681: $currentstring.='';
1682: }
1683: }
1684: return $currentstring;
1685: }
1686:
1687: #-- <li> tag (end tag optional)
1688: sub start_li {
1689: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1690: my $currentstring = '';
1691: if ($target eq 'web' || $target eq 'webgrade') {
1692: $currentstring = $token->[4];
1693: } elsif ($target eq 'tex') {
1694: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1695: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1696: #FIXME need to support types i and I
1697: if ($type=~/disc/) {
1698: $currentstring .= ' \item[$\bullet$] ';
1699: } elsif ($type=~/circle/) {
1700: $currentstring .= ' \item[$\circ$] ';
1701: } elsif ($type=~/square/) {
1702: $currentstring .= ' \item[$\diamond$] ';
1703: } elsif ($type eq '1') {
1704: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1705: } elsif ($type eq 'A') {
1706: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1707: } elsif ($type eq 'a') {
1708: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1709: } elsif ($value ne '') {
1710: $currentstring .= ' \item['.$value.'] ';
1711: } else {
1712: $currentstring .= ' \item ';
1713: }
1714: $Apache::londefdef::list_index++;
1715: }
1716: return $currentstring;
1717: }
1718:
1719: sub end_li {
1720: my ($target,$token) = @_;
1721: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1722: if ($target eq 'web' || $target eq 'webgrade') {
1723: $currentstring .= $token->[2];
1724: }
1725: return $currentstring;
1726: }
1727:
1728: #-- <u> tag (end tag required)
1729: sub start_u {
1730: my ($target,$token) = @_;
1731: my $currentstring = '';
1732: if ($target eq 'web' || $target eq 'webgrade') {
1733: $currentstring .= $token->[4];
1734: } elsif ($target eq 'tex') {
1735: &Apache::lonxml::startredirection();
1736: }
1737: return $currentstring;
1738: }
1739:
1740: sub end_u {
1741: my ($target,$token) = @_;
1742: my $currentstring = '';
1743: if ($target eq 'web' || $target eq 'webgrade') {
1744: $currentstring .= $token->[2];
1745: } elsif ($target eq 'tex') {
1746: $currentstring=&Apache::lonxml::endredirection();
1747: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1748: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1749: $currentstring=~s/(\S)\s*$/$1\}/;
1750: }
1751: return $currentstring;
1752: }
1753:
1754: #-- <ul> tag (end tag required)
1755: sub start_ul {
1756: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1757: my $currentstring = &end_p(); # Close off enclosing list.
1758: if ($target eq 'web' || $target eq 'webgrade') {
1759: $currentstring .= $token->[4];
1760: } elsif ($target eq 'tex') {
1761: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1762: $Apache::londefdef::list_index=0;
1763: if ($TeXtype eq 'disc') {
1764: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1765: '\renewcommand{\labelitemii}{$\bullet$}'.
1766: '\renewcommand{\labelitemiii}{$\bullet$}'.
1767: '\renewcommand{\labelitemiv}{$\bullet$}';
1768: } elsif ($TeXtype eq 'circle') {
1769: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1770: '\renewcommand{\labelitemii}{$\circ$}'.
1771: '\renewcommand{\labelitemiii}{$\circ$}'.
1772: '\renewcommand{\labelitemiv}{$\circ$}';
1773: } elsif ($TeXtype eq 'square') {
1774: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1775: '\renewcommand{\labelitemii}{$\diamond$}'.
1776: '\renewcommand{\labelitemiii}{$\diamond$}'.
1777: '\renewcommand{\labelitemiv}{$\diamond$}';
1778: }
1779: $currentstring .= '\strut \begin{itemize}';
1780: }
1781: return $currentstring;
1782: }
1783:
1784: sub end_ul {
1785: my ($target,$token) = @_;
1786: my $currentstring = '';
1787: if ($target eq 'web' || $target eq 'webgrade') {
1788: $currentstring = $token->[2];
1789: } elsif ($target eq 'tex') {
1790: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1791: '\renewcommand{\labelitemii}{$\bullet$}'.
1792: '\renewcommand{\labelitemiii}{$\bullet$}'.
1793: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1794: }
1795: return $currentstring;
1796: }
1797:
1798: #-- <menu> tag (end tag required)
1799: sub start_menu {
1800: my ($target,$token) = @_;
1801: my $currentstring = '';
1802: if ($target eq 'web' || $target eq 'webgrade') {
1803: $currentstring = $token->[4];
1804: } elsif ($target eq 'tex') {
1805: $currentstring = " \\begin{itemize} ";
1806: }
1807: return $currentstring;
1808: }
1809:
1810: sub end_menu {
1811: my ($target,$token) = @_;
1812: my $currentstring = '';
1813: if ($target eq 'web' || $target eq 'webgrade') {
1814: $currentstring = $token->[2];
1815: } elsif ($target eq 'tex') {
1816: $currentstring = " \\end{itemize}";
1817: }
1818: return $currentstring;
1819: }
1820:
1821: #-- <dir> tag (end tag required)
1822: sub start_dir {
1823: my ($target,$token) = @_;
1824: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1825: if ($target eq 'web' || $target eq 'webgrade') {
1826: $currentstring .= $token->[4];
1827: } elsif ($target eq 'tex') {
1828: $currentstring .= " \\begin{itemize} ";
1829: }
1830: return $currentstring;
1831: }
1832:
1833: sub end_dir {
1834: my ($target,$token) = @_;
1835: my $currentstring = '';
1836: if ($target eq 'web' || $target eq 'webgrade') {
1837: $currentstring = $token->[2];
1838: } elsif ($target eq 'tex') {
1839: $currentstring = " \\end{itemize}";
1840: }
1841: return $currentstring;
1842: }
1843:
1844: #-- <ol> tag (end tag required)
1845: sub start_ol {
1846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1847: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1848: if ($target eq 'web' || $target eq 'webgrade') {
1849: $currentstring .= $token->[4];
1850: } elsif ($target eq 'tex') {
1851: $Apache::londefdef::list_index=0;
1852: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1853: if ($type eq '1') {
1854: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1855: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1856: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1857: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1858: } elsif ($type eq 'A') {
1859: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1860: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1861: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1862: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1863: } elsif ($type eq 'a') {
1864: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1865: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1866: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1867: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1868: } elsif ($type eq 'i') {
1869: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1870: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1871: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1872: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1873: } elsif ($type eq 'I') {
1874: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1875: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1876: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1877: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1878: }
1879: $currentstring .= '\strut \begin{enumerate}';
1880: }
1881: return $currentstring;
1882: }
1883:
1884: sub end_ol {
1885: my ($target,$token) = @_;
1886: my $currentstring = '';
1887: if ($target eq 'web' || $target eq 'webgrade') {
1888: $currentstring = $token->[2];
1889: } elsif ($target eq 'tex') {
1890: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1891: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1892: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1893: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1894: }
1895: return $currentstring;
1896: }
1897:
1898: #-- <dl> tag (end tag required)
1899: sub start_dl {
1900: my ($target,$token) = @_;
1901: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1902: if ($target eq 'web' || $target eq 'webgrade') {
1903: $currentstring .= $token->[4];
1904: } elsif ($target eq 'tex') {
1905: $currentstring .= '\begin{description}';
1906: $Apache::londefdef::DL++;
1907: push(@Apache::londefdef::description,[]);
1908: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1909: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1910: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1911: }
1912: return $currentstring;
1913: }
1914:
1915: sub end_dl {
1916: my ($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: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1922: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1923: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1924: $currentstring.=' '.$element.' ';
1925: }
1926: pop(@Apache::londefdef::description);
1927: $currentstring.='\end{description}';
1928: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1929: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1930: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1931: $Apache::londefdef::DL--;
1932: }
1933: return $currentstring;
1934: }
1935:
1936: #-- <dt> tag (end tag optional)
1937: sub start_dt {
1938: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1939: my $currentstring='';
1940: if ($target eq 'web' || $target eq 'webgrade') {
1941: $currentstring = $token->[4];
1942: } elsif ($target eq 'tex') {
1943: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1944: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1945: &Apache::lonxml::startredirection();
1946: $Apache::londefdef::DT[-1]++;
1947: $Apache::londefdef::seenDT[-1]=1;
1948: }
1949: return $currentstring;
1950: }
1951:
1952: sub end_dt {
1953: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1954: my $currentstring = '';
1955: if ($target eq 'web' || $target eq 'webgrade') {
1956: $currentstring = $token->[2];
1957: } elsif ($target eq 'tex') {
1958: if ($Apache::londefdef::DT[-1]) {
1959: my $data=&item_cleanup();
1960: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1961: $Apache::londefdef::DT[-1]--;
1962: }
1963: }
1964: return $currentstring;
1965: }
1966:
1967: sub item_cleanup {
1968: my $item=&Apache::lonxml::endredirection();
1969: $item=~s/\\begin{center}//g;
1970: $item=~s/\\end{center}//g;
1971: return $item;
1972: }
1973:
1974: #-- <dd> tag (end tag optional)
1975: sub start_dd {
1976: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1977: my $currentstring = '';
1978: if ($target eq 'web' || $target eq 'webgrade') {
1979: $currentstring = $token->[4];
1980: } elsif ($target eq 'tex') {
1981: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1982: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1983: if (!$Apache::londefdef::seenDT[-1]) {
1984: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1985: }
1986: push(@{$Apache::londefdef::description[-1]},'');
1987: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1988: $Apache::londefdef::DD[-1]++;
1989: &Apache::lonxml::startredirection();
1990: }
1991: return $currentstring;
1992: }
1993:
1994: sub end_dd {
1995: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1996: my $currentstring = '';
1997: if ($target eq 'web' || $target eq 'webgrade') {
1998: $currentstring = $token->[2];
1999: } elsif ($target eq 'tex') {
2000: $Apache::londefdef::description[-1]->[-1].=
2001: &Apache::lonxml::endredirection().' \vskip 0mm ';
2002: $Apache::londefdef::DD[-1]--;
2003: }
2004: return $currentstring;
2005: }
2006:
2007: #-- <table> tag (end tag required)
2008: # <table> also ends any prior <p> that is not closed.
2009: # but, unless I allow <p>'s to nest, that's the
2010: # only way I could think of to allow <p> in
2011: # <tr> <th> bodies
2012: #
2013: #list of supported attributes: border,width,TeXwidth
2014: sub start_table {
2015: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2016: my $textwidth = '';
2017: my $currentstring = &end_p();
2018: if ($target eq 'web' || $target eq 'webgrade') {
2019: $currentstring .= $token->[4];
2020: } elsif ($target eq 'tex') {
2021: push(@Apache::londefdef::table, {});
2022: $Apache::londefdef::table[-1]{'row_number'} = -1;
2023: #maximum table's width (default coincides with text line length)
2024: if ($#Apache::londefdef::table==0) {
2025: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
2026: $textwidth=~/(\d+\.?\d*)/;
2027: $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
2028: } else {
2029: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
2030: #the maximum width of nested table is determined by LATeX width of parent cell
2031: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
2032: } else {
2033: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
2034: $textwidth=$Apache::londefdef::table[-2]{'width'};
2035: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
2036: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
2037: }
2038: }
2039: }
2040:
2041: # width either comes forced from the TeXwidth or the width parameters.
2042: # in either case it can be a percentage or absolute width.
2043: # in the width case we ignore absolute width
2044: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2045: if (!defined($TeXwidth)) {
2046: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
2047: $safeeval,undef,1);
2048: if ($htmlwidth =~ /%/) {
2049: $TeXwidth = $htmlwidth;
2050: } else {
2051: $TeXwidth = $textwidth;
2052: }
2053: }
2054: # if the width is specified as a % it is converted to an absolute width.
2055: # otherwise.. just plugged right in the hash
2056:
2057: if ($TeXwidth=~/%/) {
2058: $TeXwidth=~/(\d+)/;
2059: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
2060: } else {
2061: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
2062: }
2063: # In the end, however the table width cannot be wider than $textwidth...
2064:
2065: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
2066: $Apache::londefdef::table[-1]{'width'} = $textwidth;
2067: }
2068: #table's border
2069: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2070: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2071: unless (defined $border) { $border = 0; }
2072: if ($border) {
2073: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
2074: $Apache::londefdef::table[-1]{'vinc'} = '&';
2075: $Apache::londefdef::table[-1]{'vvinc'} = '|';
2076: } else {
2077: $Apache::londefdef::table[-1]{'hinc'} = '';
2078: $Apache::londefdef::table[-1]{'vinc'} = '&';
2079: $Apache::londefdef::table[-1]{'vvinc'} = '';
2080: }
2081: if ($#Apache::londefdef::table==0) {
2082: # Note that \newline seems to destroy the alignment envs.
2083: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2084: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2085: }
2086: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2087: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2088: $Apache::londefdef::table[-1]{'objectlen'}=[];
2089: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2090: $Apache::londefdef::table[-1]{'maxlen'}=[];
2091: $Apache::londefdef::table[-1]{'minlen'}=[];
2092: $Apache::londefdef::table[-1]{'content'}=[];
2093: $Apache::londefdef::table[-1]{'align'}=[];
2094: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2095:
2096:
2097: }
2098: return $currentstring;
2099: }
2100:
2101: sub end_table {
2102: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2103: my $currentstring = '';
2104: if ($target eq 'web' || $target eq 'webgrade') {
2105: $currentstring = $token->[2];
2106: } elsif ($target eq 'tex') {
2107: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2108: my $inmemory = '';
2109: my $output = '';
2110: my $WARNING='';
2111: #width of columns from TeXwidth attributes
2112:
2113: # Protect against unbalanced </table> tag.
2114:
2115: if (scalar(@Apache::londefdef::table) > 0) {
2116:
2117: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2118: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2119: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2120: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2121: }
2122: }
2123: }
2124: #free space and number of empty columns
2125: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2126: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2127: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2128: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2129: $empty_columns++;
2130: } else {
2131: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2132: }
2133: }
2134:
2135: #boundaries for contents columns
2136: my @min_len=();#columns can not be narrower
2137: my @max_len=();#maximum length of column
2138: my $avg_max;
2139: my $avg_min;
2140: my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
2141: for (my $jn=0;$jn<=$counter_cols; $jn++) {
2142: my ($localmin,$localmax)=(0,0);
2143: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2144: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2145: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2146: }
2147: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2148: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2149: }
2150: }
2151: push @min_len, $localmin;
2152: push @max_len, $localmax;
2153: $avg_max = $localmax + $avg_max;
2154: $avg_min = $localmin + $avg_min;
2155: }
2156: # Does not really matter what the average max/min are if there are no cols.
2157: # and this prevents div 0 in that case.
2158:
2159: if ($counter_cols != 0) {
2160: $avg_max = $avg_max/$counter_cols;
2161: $avg_min = $avg_min/$counter_cols;
2162: }
2163:
2164:
2165: # I don't think the below is needed.. but just in case:
2166:
2167: if ($avg_min > $avg_max) {
2168: my $temp = $avg_min;
2169: $avg_min = $avg_max;
2170: $avg_max = $temp;
2171: }
2172:
2173:
2174: for (my $jn=0;$jn<=$counter_cols;$jn++) {
2175: my $localmin=0,;
2176: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2177: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2178: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2179: }
2180: }
2181: if ($max_len[$jn]<$localmin) {
2182: $max_len[$jn]=$localmin;
2183: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2184: }#object size is bigger
2185: if ($min_len[$jn]<$localmin) {
2186: $min_len[$jn]=$localmin;
2187: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2188: }#object size is bigger
2189: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2190: $min_len[$jn]=0;
2191: $max_len[$jn]=0;
2192: }
2193: # Spans seem to be really bothered by max/min = 0. So if we have one
2194: # make it an average joe max/min.
2195:
2196: if ($max_len[$jn] == 0) {
2197: $max_len[$jn] = $avg_max;
2198: }
2199: if ($min_len[$jn] == 0) {
2200: $min_len[$jn] = $avg_min;
2201: }
2202:
2203: }
2204: #final adjustment of column width
2205: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2206: my @adjust=();
2207: #step 1. adjustment by maximum value
2208: my $space_needed=0;
2209: for (my $jn=0;$jn<=$#max_len;$jn++) {
2210: $space_needed=$space_needed+$max_len[$jn];
2211: }
2212: if ($space_needed<=$available_space) {
2213:
2214: for (my $jn=0;$jn<=$#max_len;$jn++) {
2215: if ($fwidth[$jn]==0) {
2216: $fwidth[$jn]=$max_len[$jn];
2217: }
2218: }
2219: } else {
2220: #step 2. adjustment by minimum value (estimation)
2221: $space_needed=0;
2222: for (my $jn=0;$jn<=$#min_len;$jn++) {
2223: $space_needed+=$min_len[$jn];
2224: }
2225: if ($space_needed>$available_space) {
2226: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2227: for (my $jn=0;$jn<=$#max_len;$jn++) {
2228: if ($fwidth[$jn]==0) {
2229: $fwidth[$jn]=$min_len[$jn];
2230: }
2231: }
2232: #check if we have objects which can be scaled
2233: my $how_many_to_scale=0;
2234: my @to_scale=();
2235: for (my $jn=0;$jn<=$#max_len;$jn++) {
2236: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2237: $how_many_to_scale++;
2238: push @to_scale, $jn;
2239: }
2240: }
2241: if ($how_many_to_scale>0) {
2242: my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
2243: foreach my $jn (@to_scale) {
2244: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2245: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2246: if ($1 ne '') {
2247: my $current_length=&recalc($1);
2248: $current_length=~/(\d+\.?\d*)/;
2249: $current_length=$current_length-$space_to_adjust;
2250: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2251: }
2252: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2253: if ($1 ne '') {
2254: my $current_length=$1;
2255: $current_length=$current_length-$space_to_adjust;
2256: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2257: }
2258: }
2259: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2260: }
2261: }
2262: } else {
2263: #step 3. adjustment over minimal + corrections
2264: my $enlarge_coef=$available_space/$space_needed;
2265: my $acsessive=0;
2266: for (my $jn=0;$jn<=$#min_len;$jn++) {
2267: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2268: if ($adjust[$jn]>$max_len[$jn]) {
2269: $fwidth[$jn]=$max_len[$jn];
2270: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2271: $adjust[$jn]=0;
2272:
2273: }
2274: }
2275: if ($acsessive>0) {
2276: #we have an excess of space and can redistribute it
2277: my $notempty_columns=0;
2278: for (my $jn=0;$jn<=$#min_len;$jn++) {
2279: if ($adjust[$jn]!=0) {
2280: $notempty_columns++;
2281: }
2282: }
2283: my $per_column=$acsessive/$notempty_columns;
2284: for (my $jn=0;$jn<=$#min_len;$jn++) {
2285: if ($adjust[$jn]!=0) {
2286: $adjust[$jn]+=$per_column;
2287: $fwidth[$jn]=$adjust[$jn];
2288: }
2289: }
2290: } else {
2291: for (my $jn=0;$jn<=$#min_len;$jn++) {
2292: $fwidth[$jn]=$adjust[$jn];
2293: }
2294: }
2295: }
2296: }
2297: # use all available width or specified width as if not specified,
2298: # the specified width gets defaulted to the available width.
2299:
2300: my $current=0;
2301: for (my $i=0;$i<=$#fwidth;$i++) {
2302: $current+=$fwidth[$i];
2303: }
2304: if ($current == 0) {
2305: $current = $Apache::londefdef::table[-1]{'width'};
2306: }
2307: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2308: for (my $i=0;$i<=$#fwidth;$i++) {
2309: $fwidth[$i]*=$coef;
2310: }
2311: #removing of empty columns if allowed
2312: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2313: if ($permission eq 'yes') {
2314: my @cleaned_table=();
2315: my @cleaned_header=();
2316: my $colind=0;
2317: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2318: if ($fwidth[$jn]!=0) {
2319: #we need to copy column
2320: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2321: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2322: $cleaned_header[$colind]=$fwidth[$jn];
2323: }
2324: $colind++;
2325: }
2326: }
2327: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2328: @fwidth=@cleaned_header;
2329: }
2330:
2331:
2332: #construct header of the table
2333: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2334: for (my $in=0;$in<=$#fwidth;$in++) {
2335: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2336: }
2337: $header_of_table .= '}';
2338:
2339: #fill the table
2340: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2341: my $have_rowspan = 0;
2342: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2343:
2344: #-----------------------------------------------------------
2345: # I think this order of doing things will ensure that
2346: # single rowspan, columspan and combined row/colspans will
2347: # work correctly. LaTeX is delicate here.
2348: # RF.
2349:
2350: # Start a rowspan if necessary:
2351:
2352: my $primary_col_width = $fwidth[$jn]; # Width of primary column.
2353: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2354: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2355: #
2356: # Do the appropriate magic if this has a colspan
2357: #
2358:
2359: my $border_char = "";
2360: if ($border) {
2361: $border_char = "|";
2362: }
2363: my $spanwidth = 0;
2364: if ($colspan > 1) {
2365: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2366: $spanwidth += $fwidth[$spancol];
2367: }
2368: $output .= '\multicolumn{'.
2369: $colspan
2370: ."}";
2371: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2372: $output .= '{'.$border_char.'c'.$border_char.'}{';
2373: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2374: $output .= '{'.$border_char.'r'.$border_char.'}{';
2375: }
2376: else {
2377: $output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
2378: }
2379:
2380: } else {
2381: $spanwidth = $primary_col_width; # If no span width will be just colwidth
2382: }
2383:
2384: # Rowspan... if colspan is 1, and there's an alignment we'll need
2385: # to kick in a multicolumn in order to get the alignment spec.
2386: # this must precede the multirow or LaTex gets quite upset.
2387: # Naturally if colspan > 1 we've already done that above ^
2388: #
2389: my $multirow_aligned = 0;
2390: if ($rowspan > 1) {
2391: if ($colspan == 1) {
2392: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2393: $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
2394: $multirow_aligned = 1;
2395: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2396: $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
2397: $multirow_aligned = 1;
2398: }
2399: }
2400: $have_rowspan++;
2401: if ($multirow_aligned) {
2402: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2403: } else {
2404: $output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
2405: }
2406:
2407: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2408: s{^\s*\\par\s*}{};
2409: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2410: s{\s*\\vskip\s*0pt\s*$}{};
2411:
2412: #
2413: # If we did not throw in a multicolumn to align, then add
2414: # an extra {
2415: # so we close correctly without having to keep additional state
2416: # around
2417: #
2418: if (!$multirow_aligned) {
2419: $output .= '{';
2420: }
2421: }
2422: if (($rowspan eq '^') || ($rowspan eq '_')) {
2423: $have_rowspan++;
2424: }
2425: #--------------------------------------------------------------
2426:
2427:
2428: # For right and center alignment of single cells.
2429: # we are going to use a multicolumn with a span of 1 to specify alignment.
2430: #
2431: if ($colspan == 1 && $rowspan == 1) {
2432: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2433: $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
2434: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2435: $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
2436: }
2437: }
2438:
2439: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2440:
2441: if (($colspan == 1 && $rowspan == 1) &&
2442: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2443: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2444: $output .= '}';
2445: }
2446:
2447: # Close off any open multirow:
2448:
2449: if ($rowspan > 1) {
2450: $output .= '}}';
2451: }
2452: # Close off the colspan...
2453: #
2454: if ($colspan > 1) {
2455: $output .= '}';
2456: $jn += $colspan-1; # Adjust for number of rows really left.
2457: }
2458: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2459: }
2460: # If have_rowspan > 0, and borders are on, then
2461: # we need to do more than put an \hline at the bottom of row.
2462: # we need to do the appropriate \cline to ensure that
2463: # the spanned rows don't have \hlines through them.
2464:
2465: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2466: $output .= ' \\\\ ';
2467: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2468: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2469: if ($rowspan ne "^") {
2470: if (($rowspan <= 1) || ($rowspan eq '_')) {
2471: my $column = $jn+1;
2472: $output .= '\cline{'.$column.'-'.$column.'} ';
2473: }
2474: }
2475: }
2476:
2477: } else {
2478: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2479: }
2480: }
2481: # Note that \newline destroys alignment env's produced by e.g. <div>
2482: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2483: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2484: if ($#Apache::londefdef::table > 0) {
2485: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2486: # Figure out max/and min width by summing us and then
2487: # apply that to the current column of the table we nest in
2488: # if it's larger than the current width or the current width
2489: # is undefined.
2490: #
2491: my $min_nested_width = 0;
2492: my $max_nested_width = 0;
2493: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2494: $min_nested_width += $min_len[$col];
2495: $max_nested_width += $max_len[$col];
2496:
2497: }
2498: # Fudge in an extra 5 mm for borders etc:
2499:
2500: $min_nested_width += 5;
2501: $max_nested_width += 5;
2502:
2503: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2504: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2505: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2506: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2507: }
2508: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2509: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2510: }
2511:
2512: pop @Apache::londefdef::table;
2513: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2514: } else {
2515: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2516: pop @Apache::londefdef::table;
2517: undef @Apache::londefdef::table;
2518: }
2519: }
2520: }
2521: return $currentstring;
2522: }
2523:
2524: #-- <tr> tag (end tag optional)
2525: sub start_tr {
2526: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2527: my $currentstring = '';
2528: if ($target eq 'web' || $target eq 'webgrade') {
2529: $currentstring = $token->[4];
2530: } elsif ($target eq 'tex') {
2531: $Apache::londefdef::table[-1]{'row_number'}++;
2532: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2533: if ($alignchar ne '') {
2534: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2535: } else {
2536: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2537: }
2538: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2539: #
2540: # Need to save the number of table columns to preserve the max # columns.
2541: #
2542: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2543: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2544: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2545: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2546: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2547: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2548: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2549: }
2550: return $currentstring;
2551: }
2552:
2553: sub end_tr {
2554: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2555: my $currentstring = &end_p(); # Close any pending <p> in the row.
2556: if ($target eq 'web' || $target eq 'webgrade') {
2557: $currentstring .= $token->[2];
2558: } elsif ($target eq 'tex') {
2559: if ($Apache::londefdef::TD_redirection) {
2560: &end_td_tex($parstack,$parser,$safeeval);
2561: }
2562: # Counter columns must be the maximum number of columns seen
2563: # in the table so far so:
2564: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2565: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2566: }
2567:
2568:
2569:
2570: }
2571: return $currentstring;
2572: }
2573:
2574: #-- <td> tag (end tag optional)
2575: sub start_td {
2576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2577: my $currentstring = '';
2578: if ($target eq 'web' || $target eq 'webgrade') {
2579: $currentstring = $token->[4];
2580: } elsif ($target eq 'tex') {
2581: $Apache::londefdef::TD_redirection = 1;
2582: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2583: }
2584: return $currentstring;
2585: }
2586:
2587: sub tag_check {
2588: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2589: my @ar=@$parstack;
2590: for (my $i=$#ar-1;$i>=0;$i--) {
2591: if (lc($$tagstack[$i]) eq $good_tag) {
2592: &start_td_tex($parstack,$parser,$safeeval);
2593: last;
2594: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2595: splice @ar, $i+1;
2596: &end_td_tex(\@ar,$parser,$safeeval);
2597: &start_td_tex($parstack,$parser,$safeeval);
2598: last;
2599: }
2600: }
2601: return '';
2602: }
2603:
2604: sub start_td_tex {
2605: my ($parstack,$parser,$safeeval) = @_;
2606: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2607: if ($alignchar eq '') {
2608: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2609: }
2610: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2611: $Apache::londefdef::table[-1]{'counter_columns'}++;
2612: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2613: if (defined $TeXwidth) {
2614: my $current_length=&recalc($TeXwidth);
2615: $current_length=~/(\d+\.?\d*)/;
2616: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2617: }
2618: &Apache::lonxml::startredirection();
2619: return '';
2620: }
2621:
2622: sub end_td_tex {
2623: my ($parstack,$parser,$safeeval) = @_;
2624: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2625: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2626: my $data = &Apache::lonxml::endredirection();
2627:
2628: # The rowspan array of the table indicates which cells are part of a span.
2629: # n indicates the start of a span set of n rows.
2630: # ^ indicates a cell that continues a span set.
2631: # _ indicates the cell is at the bottom of a span set.
2632: # If this and subsequent cells are part of a rowspan, we must
2633: # push along the row until we find one that is not.
2634:
2635: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2636: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2637: # Part of a span.
2638: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2639: $current_column++;
2640: }
2641: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2642:
2643:
2644: # Get the column and row spans.
2645: # Colspan can be done via \multicolumn if I can figure out the data structs.
2646:
2647: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2648: if (!$colspan) {
2649: $colspan = 1;
2650: }
2651:
2652: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2653: if (!$rowspan) {
2654: $rowspan = 1;
2655: }
2656:
2657:
2658:
2659: for (my $c = 0; $c < $colspan; $c++) {
2660: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2661: for (my $i = 1; $i < $rowspan; $i++) {
2662: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2663: if ($i == ($rowspan-1)) {
2664: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2665: }
2666: }
2667: }
2668:
2669: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2670: if (defined $TeXwidth) {
2671: for (my $c = 0; $c < $colspan; $c++) {
2672: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2673: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2674: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2675: }
2676: } else {
2677: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2678: my $garbage_data=$data;
2679: my $fwidth=0;
2680: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2681: my $current_length=&recalc($1);
2682: $current_length=~/(\d+\.?\d*)/;
2683: if ($fwidth<$1) {$fwidth=$1;}
2684: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2685: }
2686: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2687: my $current_length=$1;
2688: if ($fwidth<$current_length) {$fwidth=$current_length;}
2689: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2690: }
2691: for (my $c = 0; $c < $colspan; $c++) {
2692: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2693: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2694: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2695: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2696: }
2697: } 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)*/) {
2698: my $garbage_data=$data;
2699: my $fwidth=0;
2700: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2701: my $current_length=&recalc($1);
2702: $current_length=~/(\d+\.?\d*)/;
2703: if ($fwidth<$1) {$fwidth=$1;}
2704: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2705: }
2706: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2707: my $current_length=&recalc($1);
2708: $current_length=~/(\d+\.?\d*)/;
2709: if ($fwidth<$1) {$fwidth=$1;}
2710: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2711: }
2712: for (my $c = 0; $c < $colspan; $c++) {
2713: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2714: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2715: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2716: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2717: }
2718: $data=~s/\\\\\s*$//;
2719: } else {
2720: $data=~s/^\s+(\S.*)/$1/;
2721: $data=~s/(.*\S)\s+$/$1/;
2722: $data=~s/(\s)+/$1/;
2723: my ($current_length,$min_length)=(0,0);
2724: if ($data=~/\\vskip/) {
2725: my $newdata=$data;
2726: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2727: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2728: foreach my $elementdata (@newdata) {
2729: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2730: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2731: my @words=split(/ /,$elementdata);
2732: foreach my $word (@words) {
2733: my $lengthword=2.5*&LATEX_length($word);
2734: if ($min_length<$lengthword) {$min_length=$lengthword;}
2735: }
2736: }
2737: } else {
2738: $current_length=2.5*&LATEX_length($data);
2739: my @words=split(/ /,$data);
2740: foreach my $word (@words) {
2741: my $lengthword=2*&LATEX_length($word);
2742: if ($min_length<$lengthword) {$min_length=$lengthword;}
2743: }
2744: }
2745: for (my $c = 0; $c < $colspan; $c++) {
2746: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2747: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2748: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2749: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2750: }
2751: }
2752: }
2753: # Substitute all of the tables nested in this cell in their appropriate places.
2754:
2755:
2756: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2757: for (my $in=0; $in<=$nested_count; $in++) {
2758: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2759: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2760: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2761: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2762:
2763: }
2764: # Should be be killing off the 'include' elements as they're used up?
2765:
2766: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2767:
2768:
2769:
2770:
2771: # the colspan array will indicate how many columns will be spanned by this
2772: # cell..this requires that counter_columns also be adjusted accordingly
2773: # so that the next bunch of text goes in the right cell. Note that since
2774: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2775: #
2776:
2777: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2778: for (my $i = 0; $i < ($colspan -1); $i++) {
2779: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2780: }
2781: for (my $r = 0; $r < $rowspan; $r++) {
2782: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2783: # Put empty text in spanned cols.
2784:
2785: }
2786:
2787:
2788:
2789: return '';
2790: }
2791:
2792: sub end_td {
2793: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2794: my $currentstring = '';
2795: if ($target eq 'web' || $target eq 'webgrade') {
2796: $currentstring = $token->[2];
2797: } elsif ($target eq 'tex') {
2798: $Apache::londefdef::TD_redirection =0;
2799: &end_td_tex($parstack,$parser,$safeeval);
2800: }
2801: return $currentstring;
2802: }
2803:
2804: #-- <th> tag (end tag optional)
2805: sub start_th {
2806: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2807: my $currentstring = '';
2808: if ($target eq 'web' || $target eq 'webgrade') {
2809: $currentstring = $token->[4];
2810: } elsif ($target eq 'tex') {
2811: $Apache::londefdef::TD_redirection = 1;
2812: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2813: }
2814: return $currentstring;
2815: }
2816:
2817: sub tagg_check {
2818: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2819: my @ar=@$parstack;
2820: for (my $i=$#ar-1;$i>=0;$i--) {
2821: if (lc($$tagstack[$i]) eq $good_tag) {
2822: &start_th_tex($parstack,$parser,$safeeval);
2823: last;
2824: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2825: splice @ar, $i+1;
2826: &end_th_tex(\@ar,$parser,$safeeval);
2827: &start_th_tex($parstack,$parser,$safeeval);
2828: last;
2829: }
2830: }
2831: return '';
2832: }
2833:
2834: sub start_th_tex {
2835: my ($parstack,$parser,$safeeval) = @_;
2836: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2837: if ($alignchar eq '') {
2838: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2839: }
2840: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2841: $Apache::londefdef::table[-1]{'counter_columns'}++;
2842: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2843: if (defined $TeXwidth) {
2844: my $current_length=&recalc($TeXwidth);
2845: $current_length=~/(\d+\.?\d*)/;
2846: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2847: }
2848: &Apache::lonxml::startredirection();
2849: return '';
2850: }
2851:
2852: sub end_th_tex {
2853: my ($parstack,$parser,$safeeval) = @_;
2854: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2855: my $data=&Apache::lonxml::endredirection();
2856: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2857: if (defined $TeXwidth) {
2858: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2859: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2860: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2861: } else {
2862: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2863: my $garbage_data=$data;
2864: my $fwidth=0;
2865: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2866: my $current_length=&recalc($1);
2867: $current_length=~/(\d+\.?\d*)/;
2868: if ($fwidth<$1) {$fwidth=$1;}
2869: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2870: }
2871: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2872: my $current_length=$1;
2873: if ($fwidth<$current_length) {$fwidth=$current_length;}
2874: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2875: }
2876: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2877: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2878: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2879: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2880: } else {
2881: $data=~s/^\s+(\S.*)/$1/;
2882: $data=~s/(.*\S)\s+$/$1/;
2883: $data=~s/(\s)+/$1/;
2884: my ($current_length,$min_length)=(0,0);
2885: if ($data=~/\\vskip/) {
2886: my $newdata=$data;
2887: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2888: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2889: foreach my $elementdata (@newdata) {
2890: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2891: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2892: my @words=split(/ /,$elementdata);
2893: foreach my $word (@words) {
2894: my $lengthword=2.5*&LATEX_length($word);
2895: if ($min_length<$lengthword) {$min_length=$lengthword;}
2896: }
2897: }
2898: } else {
2899: $current_length=2.5*&LATEX_length($data);
2900: my @words=split(/ /,$data);
2901: foreach my $word (@words) {
2902: my $lengthword=2*&LATEX_length($word);
2903: if ($min_length<$lengthword) {$min_length=$lengthword;}
2904: }
2905: }
2906: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2907: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2908: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2909: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2910: }
2911: }
2912: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2913: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2914: }
2915: #make data bold
2916: $data='\textbf{'.$data.'}';
2917: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2918: return'';
2919: }
2920:
2921: sub end_th {
2922: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2923: my $currentstring = &end_p(); # Close any open <p> in the row.
2924: if ($target eq 'web' || $target eq 'webgrade') {
2925: $currentstring .= $token->[2];
2926: } elsif ($target eq 'tex') {
2927: $Apache::londefdef::TD_redirection =0;
2928: &end_th_tex($parstack,$parser,$safeeval);
2929: }
2930: return $currentstring;
2931: }
2932:
2933: #-- <img> tag (end tag forbidden)
2934: #
2935: # Render the <IMG> tag.
2936: # <IMG> has the following attributes (in addition to the
2937: # standard HTML ones:
2938: # TeXwrap - Governs how the tex target will try to wrap text around
2939: # horizontally aligned images.
2940: # TeXwidth - The width of the image when rendered for print (mm).
2941: # TeXheight - The height of the image when rendered for print (mm)
2942: # (Note there seems to also be support for this as a % of page size)
2943: #
2944: sub start_img {
2945: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2946: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2947: undef,1);
2948: if (! $src &&
2949: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2950: ) {
2951: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2952: return '';
2953: }
2954: &Apache::lonxml::extlink($src);
2955: my $currentstring = '';
2956: my $scaling = .3;
2957:
2958: # Render unto browsers that which are the browser's...
2959:
2960: if ($target eq 'web' || $target eq 'webgrade') {
2961: if ($env{'browser.imagesuppress'} ne 'on') {
2962: my $enc = ('yes' eq
2963: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2964: $safeeval)));
2965: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2966: $enc);
2967: } else {
2968: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2969: undef,1);
2970: if (!$alttag) {
2971: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2972: $src);
2973: }
2974: $currentstring.='[IMAGE: '.$alttag.']';
2975: }
2976:
2977: # and render unto TeX that which is LaTeX
2978:
2979: } elsif ($target eq 'tex') {
2980: #
2981: # The alignment will require some superstructure to be put around
2982: # the \includegraphics stuff. At present we can only partially
2983: # simulate the alignments offered by html.
2984: #
2985: #
2986: my $align = lc(&Apache::lonxml::get_param('align',
2987: $parstack,
2988: $safeeval,
2989: undef,1));
2990: if(!$align) {
2991: $align = "bottom"; # This is html's default so it's ours too.
2992: }
2993: #
2994: &Apache::lonxml::debug("Alignemnt = $align");
2995: # LaTeX's image/text wrapping is really bad since it wants to
2996: # make figures float.
2997: # The user has the optional parameter (applicable only to l/r
2998: # alignment to use the picins/parpic directive to get wrapped text
2999: # this is also imperfect.. that's why we give them a choice...
3000: # so they can't yell at us for our choice.
3001: #
3002: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
3003: $parstack,
3004: $safeeval,
3005: undef,0);
3006: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
3007: if(!$latex_rendering) {
3008: $latex_rendering = "texwrap";
3009: }
3010: # using texwrap inside a table does not work. So, if after all of this,
3011: # texwrap is on, we turn it off if we detect we're in a table:
3012: #
3013: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
3014: $latex_rendering = 'parpic';
3015: }
3016:
3017: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
3018:
3019: #if original gif/jpg/png file exist do following:
3020: my $origsrc=$src;
3021: my ($path,$file) = &get_eps_image($src);
3022: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
3023: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
3024: &Apache::lonxml::debug("path = $path file = $file src = $src");
3025: if (-e $src) {
3026: &Apache::lonxml::debug("$src exists");
3027: my ($height_param,$width_param)=
3028: &image_size($origsrc,0.3,$parstack,$safeeval);
3029: my $size;
3030: if ($width_param) { $size.='width='.$width_param.' mm,'; }
3031: if ($height_param) { $size.='height='.$height_param.' mm]'; }
3032: # Default size if not able to extract that (e.g. eps image).
3033:
3034: # &Apache::lonnet::logthis("Size = $size");
3035:
3036: $size='['.$size;
3037: $size=~s/,$/]/;
3038: $currentstring .= '\graphicspath{{'.$path.'}}'
3039: .'\includegraphics'.$size.'{'.$file.'} ';
3040: my $closure;
3041: ($currentstring, $closure) = &align_latex_image($align,
3042: $latex_rendering,
3043: $currentstring,
3044: $width_param,
3045: $height_param);
3046: $currentstring .= $closure;
3047:
3048: } else {
3049: &Apache::lonxml::debug("$src does not exist");
3050: #original image file doesn't exist so check the alt attribute
3051: my $alt =
3052: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
3053: unless ($alt) {
3054: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3055: }
3056:
3057: if ($alt) { $currentstring .= ' '.$alt.' '; }
3058: }
3059:
3060: # And here's where the semi-quote breaks down: allow the user
3061: # to edit the beast as well by rendering the problem for edit:
3062: } elsif ($target eq 'edit') {
3063: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
3064: $currentstring .=&Apache::edit::tag_start($target,$token);
3065: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
3066: &Apache::edit::browse('src',undef,'alt',$only).' '.
3067: &Apache::edit::search('src',undef,'alt').'<br />';
3068: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
3069: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
3070: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
3071: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
3072: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
3073: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
3074: ['','bottom','middle','top','left','right'],$token,5);
3075: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
3076: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
3077: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
3078: ['no','yes'], $token, 2);
3079: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
3080: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
3081: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
3082: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
3083: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
3084:
3085: if ($token->[2]{'src'}=~/\$/) {
3086: $currentstring.='Variable image source';
3087: } else {
3088: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
3089: if ($width) { $currentstring.=' width="'.$width.'" '; }
3090: if ($height) { $currentstring.=' height="'.$height.'" '; }
3091: $currentstring .= ' />';
3092: }
3093: } elsif ($target eq 'modified') {
3094: my ($osrc,$owidth,$oheight)=
3095: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3096: my $ctag=&Apache::edit::get_new_args($token,$parstack,
3097: $safeeval,'src','alt','align',
3098: 'TeXwidth','TeXheight', 'TeXwrap',
3099: 'width','height','encrypturl');
3100: my ($nsrc,$nwidth,$nheight)=
3101: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3102: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
3103: &image_replication($loc);
3104: my ($iwidth,$iheight);
3105: if (-e $loc) {
3106: my $image = Image::Magick->new;
3107: $image->Read($loc);
3108: ($iwidth, $iheight) = ($image->Get('width'),
3109: $image->Get('height'));
3110: }
3111: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
3112: # changed image or no size specified,
3113: # if they didn't explicitly change the
3114: # width or height use the ones from the image
3115: if ($iwidth && $iheight) {
3116: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
3117: $token->[2]{'width'} = $iwidth;$ctag=1;
3118: }
3119: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
3120: $token->[2]{'height'}=$iheight;$ctag=1;
3121: }
3122: }
3123: }
3124: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
3125: # if we don't have a width or height
3126: if ($iwidth && $cwidth && !$cheight) {
3127: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
3128: }
3129: if ($iheight && $cheight && !$cwidth) {
3130: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
3131: }
3132: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3133: }
3134:
3135: return $currentstring;
3136: }
3137:
3138: sub end_img {
3139: my ($target,$token) = @_;
3140: my $currentstring = '';
3141: if ($target eq 'web' || $target eq 'webgrade') {
3142: $currentstring = $token->[2];
3143: } elsif ($target eq 'tex') {
3144: $currentstring = '';
3145: }
3146: return $currentstring;
3147: }
3148:
3149: #-- <applet> tag (end tag required)
3150: sub start_applet {
3151: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3152:
3153: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3154: &Apache::lonxml::extlink($code);
3155: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3156: undef,1);
3157: &Apache::lonxml::extlink($archive);
3158: my $currentstring = '';
3159: if ($target eq 'web' || $target eq 'webgrade') {
3160: if ($env{'browser.appletsuppress'} ne 'on') {
3161: $currentstring = &Apache::lonenc::encrypt_ref($token,
3162: {'code'=>$code,
3163: 'archive'=>$archive}
3164: );
3165: } else {
3166: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3167: $safeeval,undef,1);
3168: unless ($alttag) {
3169: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3170: $code);
3171: }
3172: $currentstring='[APPLET: '.$alttag.']';
3173: }
3174: } elsif ($target eq 'tex') {
3175: # Turn off some stuff we can't be inside thank you LaTeX
3176:
3177:
3178: my $restart_sub = 0;
3179: my $restart_sup = 0;
3180:
3181: # Since <sub> and <sup> are simple tags it's ok to turn off/on
3182: # using the start_ stop_ functions.. those tags only care about
3183: # $target.
3184:
3185: if (&is_inside_of($tagstack, "sub")) {
3186: $restart_sub = 1;
3187: $currentstring .= &end_sub($target, $token, $tagstack,
3188: $parstack, $parser, $safeeval);
3189: }
3190: if (&is_inside_of($tagstack, "sup")) {
3191: $restart_sup = 1;
3192: $currentstring .= &end_sup($target, $token, $tagstack,
3193: $parstack, $parser, $safeeval);
3194: }
3195:
3196: # Now process the applet; just replace it with its alt attribute.
3197:
3198: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3199: $safeeval,undef,1);
3200: unless ($alttag) {
3201: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3202: undef,1);
3203: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3204: $code);
3205: }
3206: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3207: '.}\end{center}';
3208:
3209: # Turn stuff back on that we can't be inside of.
3210:
3211: if ($restart_sub) {
3212: $currentstring .= &start_sub($target, $token, $tagstack,
3213: $parstack, $parser, $safeeval);
3214: }
3215: if ($restart_sup) {
3216: $currentstring .= &start_sup($target, $token, $tagstack,
3217: $parstack, $parser, $safeeval);
3218: }
3219: }
3220: return $currentstring;
3221: }
3222:
3223: sub end_applet {
3224: my ($target,$token) = @_;
3225: my $currentstring = '';
3226: if ($target eq 'web' || $target eq 'webgrade') {
3227: $currentstring = $token->[2];
3228: } elsif ($target eq 'tex') {
3229: }
3230: return $currentstring;
3231: }
3232:
3233: #-- <embed> tag (end tag optional/required)
3234: sub start_embed {
3235: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3236: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3237: &Apache::lonxml::extlink($src);
3238: my $currentstring = '';
3239: if ($target eq 'web' || $target eq 'webgrade') {
3240: if ($env{'browser.embedsuppress'} ne 'on') {
3241: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3242: } else {
3243: my $alttag=&Apache::lonxml::get_param
3244: ('alt',$parstack,$safeeval,undef,1);
3245: unless ($alttag) {
3246: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3247: }
3248: $currentstring='[EMBED: '.$alttag.']';
3249: }
3250: } elsif ($target eq 'tex') {
3251: }
3252: return $currentstring;
3253: }
3254:
3255: sub end_embed {
3256: my ($target,$token) = @_;
3257: my $currentstring = '';
3258: if ($target eq 'web' || $target eq 'webgrade') {
3259: $currentstring = $token->[2];
3260: } elsif ($target eq 'tex') {
3261: }
3262: return $currentstring;
3263: }
3264:
3265: #-- <param> tag (end tag forbidden)
3266: sub start_param {
3267: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3268: if (&Apache::lonxml::get_param('name',$parstack,
3269: $safeeval,undef,1)=~/^cabbase$/i) {
3270: my $value=&Apache::lonxml::get_param('value',$parstack,
3271: $safeeval,undef,1);
3272: &Apache::lonxml::extlink($value);
3273: }
3274:
3275: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3276: &Apache::lonxml::extlink($src);
3277: my $currentstring = '';
3278: if ($target eq 'web' || $target eq 'webgrade') {
3279: my %toconvert;
3280: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3281: if ($src) { $toconvert{'src'}= $src; }
3282: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3283: undef,1);
3284: if ($name=~/^cabbase$/i) {
3285: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3286: $safeeval,undef,1);
3287: }
3288: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3289: } elsif ($target eq 'tex') {
3290: }
3291: return $currentstring;
3292: }
3293:
3294: sub end_param {
3295: my ($target,$token) = @_;
3296: my $currentstring = '';
3297: if ($target eq 'web' || $target eq 'webgrade') {
3298: $currentstring = $token->[2];
3299: } elsif ($target eq 'tex') {
3300: }
3301: return $currentstring;
3302: }
3303:
3304: #-- <allow> tag
3305: sub start_allow {
3306: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3307: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3308: &Apache::lonxml::extlink($src);
3309:
3310: if ($target eq 'tex') { &image_replication($src); }
3311: my $result;
3312: if ($target eq 'edit') {
3313: $result .=&Apache::edit::tag_start($target,$token);
3314: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3315: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3316: } elsif ($target eq 'modified') {
3317: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3318: $safeeval,'src');
3319: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3320: }
3321: return $result;
3322: }
3323:
3324: sub end_allow {
3325: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3326: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3327: return '';
3328: }
3329:
3330: #-- Frames (end tag required)
3331: #-- <frameset>
3332: sub start_frameset {
3333: my ($target,$token) = @_;
3334: my $currentstring = ''; # Close any pending para.
3335: if ($target eq 'web' || $target eq 'webgrade') {
3336: $currentstring =
3337: &Apache::loncommon::start_page($Apache::londefdef::title,
3338: $Apache::londefdef::head,
3339: {'add_entries' => $token->[2],
3340: 'no_title' => 1,
3341: 'force_register' => 1,
3342: 'frameset' => 1,});
3343:
3344: }
3345: return $currentstring;
3346: }
3347:
3348: sub end_frameset {
3349: my ($target,$token) = @_;
3350: my $currentstring = '';
3351: if ($target eq 'web' || $target eq 'webgrade') {
3352: $currentstring = $token->[2];
3353: }
3354: return $currentstring;
3355: }
3356:
3357: #-- <xmp> (end tag required)
3358: sub start_xmp {
3359: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3360: my $currentstring = '';
3361: if ($target eq 'web' || $target eq 'webgrade') {
3362: $currentstring .= $token->[4];
3363: } elsif ($target eq 'tex') {
3364: $currentstring .= '\begin{verbatim}';
3365: }
3366: return $currentstring;
3367: }
3368:
3369: sub end_xmp {
3370: my ($target,$token) = @_;
3371: my $currentstring = '';
3372: if ($target eq 'web' || $target eq 'webgrade') {
3373: $currentstring .= $token->[2];
3374: } elsif ($target eq 'tex') {
3375: $currentstring .= '\end{verbatim}';
3376: }
3377: return $currentstring;
3378: }
3379:
3380: #-- <pre> (end tag required)
3381: sub start_pre {
3382: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3383: my $currentstring = &end_p(); # close off pending <p>
3384: if ($target eq 'web' || $target eq 'webgrade') {
3385: $currentstring .= $token->[4];
3386: } elsif ($target eq 'tex') {
3387: $currentstring .= '\begin{verbatim}';
3388: &Apache::lonxml::disable_LaTeX_substitutions();
3389: }
3390: return $currentstring;
3391: }
3392:
3393: sub end_pre {
3394: my ($target,$token) = @_;
3395: my $currentstring = '';
3396: if ($target eq 'web' || $target eq 'webgrade') {
3397: $currentstring .= $token->[2];
3398: } elsif ($target eq 'tex') {
3399: $currentstring .= '\end{verbatim}';
3400: &Apache::lonxml::enable_LaTeX_substitutions();
3401: }
3402: return $currentstring;
3403: }
3404:
3405: #-- <insert>
3406: sub start_insert {
3407: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3408: my $currentstring = '';
3409: if ($target eq 'web' || $target eq 'webgrade') {
3410: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3411: $currentstring .= '<b>'.$display.'</b>';;
3412: }
3413: return $currentstring;
3414: }
3415:
3416: sub end_insert {
3417: my ($target,$token) = @_;
3418: my $currentstring = '';
3419: if ($target eq 'web' || $target eq 'webgrade') {
3420: $currentstring .= '';
3421: }
3422: return $currentstring;
3423: }
3424:
3425: #-- <externallink>
3426: sub start_externallink {
3427: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3428: my $currentstring = '';
3429: if ($target eq 'web' || $target eq 'webgrade') {
3430: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3431: $currentstring .= '<b>'.$display.'</b>';;
3432: }
3433: return $currentstring;
3434: }
3435:
3436: sub end_externallink {
3437: my ($target,$token) = @_;
3438: my $currentstring = '';
3439: if ($target eq 'web' || $target eq 'webgrade') {
3440: $currentstring .= '';
3441: }
3442: return $currentstring;
3443: }
3444:
3445: #-- <blankspace heigth="">
3446: sub start_blankspace {
3447: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3448: my $currentstring = &end_p(); # closes off any unclosed <p>
3449: if ($target eq 'tex') {
3450: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3451: $currentstring .= '\vskip '.$howmuch.' ';
3452: }
3453: return $currentstring;
3454: }
3455:
3456: sub end_blankspace {
3457: my ($target,$token) = @_;
3458: my $currentstring = '';
3459: if ($target eq 'tex') {
3460: $currentstring .= '';
3461: }
3462: return $currentstring;
3463: }
3464:
3465: #-- <abbr> tag (end tag required)
3466: sub start_abbr {
3467: my ($target,$token) = @_;
3468: my $currentstring = '';
3469: if ($target eq 'web' || $target eq 'webgrade') {
3470: $currentstring = $token->[4];
3471: }
3472: return $currentstring;
3473: }
3474:
3475: sub end_abbr {
3476: my ($target,$token) = @_;
3477: my $currentstring = '';
3478: if ($target eq 'web' || $target eq 'webgrade') {
3479: $currentstring = $token->[2];
3480: }
3481: return $currentstring;
3482: }
3483:
3484: #-- <acronym> tag (end tag required)
3485: sub start_acronym {
3486: my ($target,$token) = @_;
3487: my $currentstring = '';
3488: if ($target eq 'web' || $target eq 'webgrade') {
3489: $currentstring = $token->[4];
3490: }
3491: return $currentstring;
3492: }
3493:
3494: sub end_acronym {
3495: my ($target,$token) = @_;
3496: my $currentstring = '';
3497: if ($target eq 'web' || $target eq 'webgrade') {
3498: $currentstring = $token->[2];
3499: }
3500: return $currentstring;
3501: }
3502:
3503: #-- <area> tag (end tag forbidden)
3504: sub start_area {
3505: my ($target,$token) = @_;
3506: my $currentstring = '';
3507: if ($target eq 'web' || $target eq 'webgrade') {
3508: $currentstring = $token->[4];
3509: }
3510: return $currentstring;
3511: }
3512:
3513: sub end_area {
3514: my ($target,$token) = @_;
3515: my $currentstring = '';
3516: if ($target eq 'web' || $target eq 'webgrade') {
3517: $currentstring = $token->[2];
3518: }
3519: return $currentstring;
3520: }
3521:
3522: #-- <base> tag (end tag forbidden)
3523: sub start_base {
3524: my ($target,$token) = @_;
3525: my $currentstring = '';
3526: if ($target eq 'web' || $target eq 'webgrade') {
3527: $currentstring = $token->[4];
3528: }
3529: return $currentstring;
3530: }
3531:
3532: sub end_base {
3533: my ($target,$token) = @_;
3534: my $currentstring = '';
3535: if ($target eq 'web' || $target eq 'webgrade') {
3536: $currentstring = $token->[2];
3537: }
3538: return $currentstring;
3539: }
3540:
3541: #-- <bdo> tag (end tag required)
3542: sub start_bdo {
3543: my ($target,$token) = @_;
3544: my $currentstring = '';
3545: if ($target eq 'web' || $target eq 'webgrade') {
3546: $currentstring = $token->[4];
3547: }
3548: return $currentstring;
3549: }
3550:
3551: sub end_bdo {
3552: my ($target,$token) = @_;
3553: my $currentstring = '';
3554: if ($target eq 'web' || $target eq 'webgrade') {
3555: $currentstring = $token->[2];
3556: }
3557: return $currentstring;
3558: }
3559:
3560: #-- <bgsound> tag (end tag optional)
3561: sub start_bgsound {
3562: my ($target,$token) = @_;
3563: my $currentstring = '';
3564: if ($target eq 'web' || $target eq 'webgrade') {
3565: $currentstring = $token->[4];
3566: }
3567: return $currentstring;
3568: }
3569:
3570: sub end_bgsound {
3571: my ($target,$token) = @_;
3572: my $currentstring = '';
3573: if ($target eq 'web' || $target eq 'webgrade') {
3574: $currentstring = $token->[2];
3575: }
3576: return $currentstring;
3577: }
3578:
3579: #-- <blink> tag (end tag required)
3580: sub start_blink {
3581: my ($target,$token) = @_;
3582: my $currentstring = '';
3583: if ($target eq 'web' || $target eq 'webgrade') {
3584: $currentstring = $token->[4];
3585: }
3586: return $currentstring;
3587: }
3588:
3589: sub end_blink {
3590: my ($target,$token) = @_;
3591: my $currentstring = '';
3592: if ($target eq 'web' || $target eq 'webgrade') {
3593: $currentstring = $token->[2];
3594: }
3595: return $currentstring;
3596: }
3597:
3598: #-- <blockquote> tag (end tag required)
3599: sub start_blockquote {
3600: my ($target,$token) = @_;
3601: my $currentstring = &end_p(); # Close any unclosed <p>
3602: if ($target eq 'web' || $target eq 'webgrade') {
3603: $currentstring .= $token->[4];
3604: }
3605: if ($target eq 'tex') {
3606: $currentstring .= '\begin{quote}';
3607: }
3608: return $currentstring;
3609: }
3610:
3611: sub end_blockquote {
3612: my ($target,$token) = @_;
3613: my $currentstring = '';
3614: if ($target eq 'web' || $target eq 'webgrade') {
3615: $currentstring = $token->[2];
3616: }
3617: if ($target eq 'tex') {
3618: $currentstring = '\end{quote}';
3619: }
3620: return $currentstring;
3621: }
3622:
3623: #-- <button> tag (end tag required)
3624: sub start_button {
3625: my ($target,$token) = @_;
3626: my $currentstring = '';
3627: if ($target eq 'web' || $target eq 'webgrade') {
3628: $currentstring = $token->[4];
3629: }
3630: return $currentstring;
3631: }
3632:
3633: sub end_button {
3634: my ($target,$token) = @_;
3635: my $currentstring = '';
3636: if ($target eq 'web' || $target eq 'webgrade') {
3637: $currentstring = $token->[2];
3638: }
3639: return $currentstring;
3640: }
3641:
3642: #-- <caption> tag (end tag required)
3643: sub start_caption {
3644: my ($target,$token) = @_;
3645: my $currentstring = '';
3646: if ($target eq 'web' || $target eq 'webgrade') {
3647: $currentstring = $token->[4];
3648: }
3649: return $currentstring;
3650: }
3651:
3652: sub end_caption {
3653: my ($target,$token) = @_;
3654: my $currentstring = '';
3655: if ($target eq 'web' || $target eq 'webgrade') {
3656: $currentstring = $token->[2];
3657: }
3658: return $currentstring;
3659: }
3660:
3661: #-- <col> tag (end tag forbdden)
3662: sub start_col {
3663: my ($target,$token) = @_;
3664: my $currentstring = '';
3665: if ($target eq 'web' || $target eq 'webgrade') {
3666: $currentstring = $token->[4];
3667: }
3668: return $currentstring;
3669: }
3670:
3671: sub end_col {
3672: my ($target,$token) = @_;
3673: my $currentstring = '';
3674: if ($target eq 'web' || $target eq 'webgrade') {
3675: $currentstring = $token->[2];
3676: }
3677: return $currentstring;
3678: }
3679:
3680: #-- <colgroup> tag (end tag optional)
3681: sub start_colgroup {
3682: my ($target,$token) = @_;
3683: my $currentstring = '';
3684: if ($target eq 'web' || $target eq 'webgrade') {
3685: $currentstring = $token->[4];
3686: }
3687: return $currentstring;
3688: }
3689:
3690: sub end_colgroup {
3691: my ($target,$token) = @_;
3692: my $currentstring = '';
3693: if ($target eq 'web' || $target eq 'webgrade') {
3694: $currentstring = $token->[2];
3695: }
3696: return $currentstring;
3697: }
3698:
3699: #-- <del> tag (end tag required)
3700: sub start_del {
3701: my ($target,$token) = @_;
3702: my $currentstring = '';
3703: if ($target eq 'web' || $target eq 'webgrade') {
3704: $currentstring = $token->[4];
3705: }
3706: return $currentstring;
3707: }
3708:
3709: sub end_del {
3710: my ($target,$token) = @_;
3711: my $currentstring = '';
3712: if ($target eq 'web' || $target eq 'webgrade') {
3713: $currentstring = $token->[2];
3714: }
3715: return $currentstring;
3716: }
3717:
3718: #-- <fieldset> tag (end tag required)
3719: sub start_fieldset {
3720: my ($target,$token) = @_;
3721: my $currentstring = '';
3722: if ($target eq 'web' || $target eq 'webgrade') {
3723: $currentstring = $token->[4];
3724: }
3725: return $currentstring;
3726: }
3727:
3728: sub end_fieldset {
3729: my ($target,$token) = @_;
3730: my $currentstring = '';
3731: if ($target eq 'web' || $target eq 'webgrade') {
3732: $currentstring = $token->[2];
3733: }
3734: return $currentstring;
3735: }
3736:
3737: #-- <frame> tag (end tag forbidden)
3738: sub start_frame {
3739: my ($target,$token) = @_;
3740: my $currentstring = '';
3741: if ($target eq 'web' || $target eq 'webgrade') {
3742: $currentstring = $token->[4];
3743: }
3744: return $currentstring;
3745: }
3746:
3747: sub end_frame {
3748: my ($target,$token) = @_;
3749: my $currentstring = '';
3750: if ($target eq 'web' || $target eq 'webgrade') {
3751: $currentstring = $token->[2];
3752: }
3753: return $currentstring;
3754: }
3755:
3756: #-- <iframe> tag (end tag required)
3757: sub start_iframe {
3758: my ($target,$token) = @_;
3759: my $currentstring = '';
3760: if ($target eq 'web' || $target eq 'webgrade') {
3761: $currentstring = $token->[4];
3762: }
3763: return $currentstring;
3764: }
3765:
3766: sub end_iframe {
3767: my ($target,$token) = @_;
3768: my $currentstring = '';
3769: if ($target eq 'web' || $target eq 'webgrade') {
3770: $currentstring = $token->[2];
3771: }
3772: return $currentstring;
3773: }
3774:
3775: #-- <ins> tag (end tag required)
3776: sub start_ins {
3777: my ($target,$token) = @_;
3778: my $currentstring = '';
3779: if ($target eq 'web' || $target eq 'webgrade') {
3780: $currentstring = $token->[4];
3781: }
3782: return $currentstring;
3783: }
3784:
3785: sub end_ins {
3786: my ($target,$token) = @_;
3787: my $currentstring = '';
3788: if ($target eq 'web' || $target eq 'webgrade') {
3789: $currentstring = $token->[2];
3790: }
3791: return $currentstring;
3792: }
3793:
3794: #-- <isindex> tag (end tag forbidden)
3795: sub start_isindex {
3796: my ($target,$token) = @_;
3797: my $currentstring = '';
3798: if ($target eq 'web' || $target eq 'webgrade') {
3799: $currentstring = $token->[4];
3800: }
3801: return $currentstring;
3802: }
3803:
3804: sub end_isindex {
3805: my ($target,$token) = @_;
3806: my $currentstring = '';
3807: if ($target eq 'web' || $target eq 'webgrade') {
3808: $currentstring = $token->[2];
3809: }
3810: return $currentstring;
3811: }
3812:
3813: #-- <keygen> tag (end tag forbidden)
3814: sub start_keygen {
3815: my ($target,$token) = @_;
3816: my $currentstring = '';
3817: if ($target eq 'web' || $target eq 'webgrade') {
3818: $currentstring = $token->[4];
3819: }
3820: return $currentstring;
3821: }
3822:
3823: sub end_keygen {
3824: my ($target,$token) = @_;
3825: my $currentstring = '';
3826: if ($target eq 'web' || $target eq 'webgrade') {
3827: $currentstring = $token->[2];
3828: }
3829: return $currentstring;
3830: }
3831:
3832: #-- <label> tag
3833: sub start_label {
3834: my ($target,$token) = @_;
3835: my $currentstring = '';
3836: if ($target eq 'web' || $target eq 'webgrade') {
3837: $currentstring = $token->[4];
3838: }
3839: return $currentstring;
3840: }
3841:
3842: sub end_label {
3843: my ($target,$token) = @_;
3844: my $currentstring = '';
3845: if ($target eq 'web' || $target eq 'webgrade') {
3846: $currentstring = $token->[2];
3847: }
3848: return $currentstring;
3849: }
3850:
3851: #-- <layer> tag (end tag required)
3852: sub start_layer {
3853: my ($target,$token) = @_;
3854: my $currentstring = '';
3855: if ($target eq 'web' || $target eq 'webgrade') {
3856: $currentstring = $token->[4];
3857: }
3858: return $currentstring;
3859: }
3860:
3861: sub end_layer {
3862: my ($target,$token) = @_;
3863: my $currentstring = '';
3864: if ($target eq 'web' || $target eq 'webgrade') {
3865: $currentstring = $token->[2];
3866: }
3867: return $currentstring;
3868: }
3869:
3870: #-- <legend> tag (end tag required)
3871: sub start_legend {
3872: my ($target,$token) = @_;
3873: my $currentstring = '';
3874: if ($target eq 'web' || $target eq 'webgrade') {
3875: $currentstring = $token->[4];
3876: }
3877: return $currentstring;
3878: }
3879:
3880: sub end_legend {
3881: my ($target,$token) = @_;
3882: my $currentstring = '';
3883: if ($target eq 'web' || $target eq 'webgrade') {
3884: $currentstring = $token->[2];
3885: }
3886: return $currentstring;
3887: }
3888:
3889: #-- <link> tag (end tag forbidden)
3890: sub start_link {
3891: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3892: my $currentstring = '';
3893: if ($target eq 'web' || $target eq 'webgrade') {
3894: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3895: undef,1);
3896: &Apache::lonxml::extlink($href);
3897: $currentstring = $token->[4];
3898: }
3899: return $currentstring;
3900: }
3901:
3902: sub end_link {
3903: my ($target,$token) = @_;
3904: my $currentstring = '';
3905: if ($target eq 'web' || $target eq 'webgrade') {
3906: $currentstring = $token->[2];
3907: }
3908: return $currentstring;
3909: }
3910:
3911: #-- <marquee> tag (end tag optional)
3912: sub start_marquee {
3913: my ($target,$token) = @_;
3914: my $currentstring = '';
3915: if ($target eq 'web' || $target eq 'webgrade') {
3916: $currentstring = $token->[4];
3917: }
3918: return $currentstring;
3919: }
3920:
3921: sub end_marquee {
3922: my ($target,$token) = @_;
3923: my $currentstring = '';
3924: if ($target eq 'web' || $target eq 'webgrade') {
3925: $currentstring = $token->[2];
3926: }
3927: return $currentstring;
3928: }
3929:
3930: #-- <multicol> tag (end tag required)
3931: sub start_multicol {
3932: my ($target,$token) = @_;
3933: my $currentstring = &end_p(); # Close any pending <p>
3934: if ($target eq 'web' || $target eq 'webgrade') {
3935: $currentstring .= $token->[4];
3936: }
3937: return $currentstring;
3938: }
3939:
3940: sub end_multicol {
3941: my ($target,$token) = @_;
3942: my $currentstring = '';
3943: if ($target eq 'web' || $target eq 'webgrade') {
3944: $currentstring = $token->[2];
3945: }
3946: return $currentstring;
3947: }
3948:
3949: #-- <nobr> tag (end tag required)
3950: sub start_nobr {
3951: my ($target,$token) = @_;
3952: my $currentstring = '';
3953: if ($target eq 'web' || $target eq 'webgrade') {
3954: $currentstring = $token->[4];
3955: } elsif ($target eq 'tex') {
3956: $currentstring='\mbox{';
3957: }
3958: return $currentstring;
3959: }
3960:
3961: sub end_nobr {
3962: my ($target,$token) = @_;
3963: my $currentstring = '';
3964: if ($target eq 'web' || $target eq 'webgrade') {
3965: $currentstring = $token->[2];
3966: } elsif ($target eq 'tex') {
3967: $currentstring='}';
3968: }
3969: return $currentstring;
3970: }
3971:
3972: #-- <noembed> tag (end tag required)
3973: sub start_noembed {
3974: my ($target,$token) = @_;
3975: my $currentstring = '';
3976: if ($target eq 'web' || $target eq 'webgrade') {
3977: $currentstring = $token->[4];
3978: }
3979: return $currentstring;
3980: }
3981:
3982: sub end_noembed {
3983: my ($target,$token) = @_;
3984: my $currentstring = '';
3985: if ($target eq 'web' || $target eq 'webgrade') {
3986: $currentstring = $token->[2];
3987: }
3988: return $currentstring;
3989: }
3990:
3991: #-- <noframes> tag (end tag required)
3992: sub start_noframes {
3993: my ($target,$token) = @_;
3994: my $currentstring = '';
3995: if ($target eq 'web' || $target eq 'webgrade') {
3996: $currentstring = $token->[4];
3997: }
3998: return $currentstring;
3999: }
4000:
4001: sub end_noframes {
4002: my ($target,$token) = @_;
4003: my $currentstring = '';
4004: if ($target eq 'web' || $target eq 'webgrade') {
4005: $currentstring = $token->[2];
4006: }
4007: return $currentstring;
4008: }
4009:
4010: #-- <nolayer> tag (end tag required)
4011: sub start_nolayer {
4012: my ($target,$token) = @_;
4013: my $currentstring = '';
4014: if ($target eq 'web' || $target eq 'webgrade') {
4015: $currentstring = $token->[4];
4016: }
4017: return $currentstring;
4018: }
4019:
4020: sub end_nolayer {
4021: my ($target,$token) = @_;
4022: my $currentstring = '';
4023: if ($target eq 'web' || $target eq 'webgrade') {
4024: $currentstring = $token->[2];
4025: }
4026: return $currentstring;
4027: }
4028:
4029: #-- <noscript> tag (end tag required)
4030: sub start_noscript {
4031: my ($target,$token) = @_;
4032: my $currentstring = '';
4033: if ($target eq 'web' || $target eq 'webgrade') {
4034: $currentstring = $token->[4];
4035: }
4036: return $currentstring;
4037: }
4038:
4039: sub end_noscript {
4040: my ($target,$token) = @_;
4041: my $currentstring = '';
4042: if ($target eq 'web' || $target eq 'webgrade') {
4043: $currentstring = $token->[2];
4044: }
4045: return $currentstring;
4046: }
4047:
4048: #-- <object> tag (end tag required)
4049: sub start_object {
4050: my ($target,$token) = @_;
4051: my $currentstring = '';
4052: if ($target eq 'web' || $target eq 'webgrade') {
4053: $currentstring = $token->[4];
4054: }
4055: return $currentstring;
4056: }
4057:
4058: sub end_object {
4059: my ($target,$token) = @_;
4060: my $currentstring = '';
4061: if ($target eq 'web' || $target eq 'webgrade') {
4062: $currentstring = $token->[2];
4063: }
4064: return $currentstring;
4065: }
4066:
4067: #-- <optgroup> tag (end tag required)
4068: sub start_optgroup {
4069: my ($target,$token) = @_;
4070: my $currentstring = '';
4071: if ($target eq 'web' || $target eq 'webgrade') {
4072: $currentstring = $token->[4];
4073: }
4074: return $currentstring;
4075: }
4076:
4077: sub end_optgroup {
4078: my ($target,$token) = @_;
4079: my $currentstring = '';
4080: if ($target eq 'web' || $target eq 'webgrade') {
4081: $currentstring = $token->[2];
4082: }
4083: return $currentstring;
4084: }
4085:
4086: #-- <samp> tag (end tag required)
4087: sub start_samp {
4088: my ($target,$token) = @_;
4089: my $currentstring = '';
4090: if ($target eq 'web' || $target eq 'webgrade') {
4091: $currentstring = $token->[4];
4092: } elsif ($target eq 'tex') {
4093: $currentstring='\texttt{';
4094: }
4095: return $currentstring;
4096: }
4097:
4098: sub end_samp {
4099: my ($target,$token) = @_;
4100: my $currentstring = '';
4101: if ($target eq 'web' || $target eq 'webgrade') {
4102: $currentstring = $token->[2];
4103: } elsif ($target eq 'tex') {
4104: $currentstring='}';
4105: }
4106: return $currentstring;
4107: }
4108:
4109: #-- <server> tag
4110: sub start_server {
4111: my ($target,$token) = @_;
4112: my $currentstring = '';
4113: if ($target eq 'web' || $target eq 'webgrade') {
4114: $currentstring = $token->[4];
4115: }
4116: return $currentstring;
4117: }
4118:
4119: sub end_server {
4120: my ($target,$token) = @_;
4121: my $currentstring = '';
4122: if ($target eq 'web' || $target eq 'webgrade') {
4123: $currentstring = $token->[2];
4124: }
4125: return $currentstring;
4126: }
4127:
4128: #-- <spacer> tag (end tag forbidden)
4129: sub start_spacer {
4130: my ($target,$token) = @_;
4131: my $currentstring = &end_p(); # Close off any open <p> tag.
4132: if ($target eq 'web' || $target eq 'webgrade') {
4133: $currentstring .= $token->[4];
4134: }
4135: return $currentstring;
4136: }
4137:
4138: sub end_spacer {
4139: my ($target,$token) = @_;
4140: my $currentstring = '';
4141: if ($target eq 'web' || $target eq 'webgrade') {
4142: $currentstring = $token->[2];
4143: }
4144: return $currentstring;
4145: }
4146:
4147: #-- <span> tag (end tag required)
4148: sub start_span {
4149: my ($target,$token) = @_;
4150: my $currentstring = '';
4151: if ($target eq 'web' || $target eq 'webgrade') {
4152: $currentstring = $token->[4];
4153: }
4154: return $currentstring;
4155: }
4156:
4157: sub end_span {
4158: my ($target,$token) = @_;
4159: my $currentstring = '';
4160: if ($target eq 'web' || $target eq 'webgrade') {
4161: $currentstring = $token->[2];
4162: }
4163: return $currentstring;
4164: }
4165:
4166: #-- <tbody> tag (end tag optional)
4167: sub start_tbody {
4168: my ($target,$token) = @_;
4169: my $currentstring = '';
4170: if ($target eq 'web' || $target eq 'webgrade') {
4171: $currentstring = $token->[4];
4172: }
4173: return $currentstring;
4174: }
4175:
4176: sub end_tbody {
4177: my ($target,$token) = @_;
4178: my $currentstring = '';
4179: if ($target eq 'web' || $target eq 'webgrade') {
4180: $currentstring = $token->[2];
4181: }
4182: return $currentstring;
4183: }
4184:
4185: #-- <tfoot> tag (end tag optional)
4186: sub start_tfoot {
4187: my ($target,$token) = @_;
4188: my $currentstring = '';
4189: if ($target eq 'web' || $target eq 'webgrade') {
4190: $currentstring = $token->[4];
4191: }
4192: return $currentstring;
4193: }
4194:
4195: sub end_tfoot {
4196: my ($target,$token) = @_;
4197: my $currentstring = '';
4198: if ($target eq 'web' || $target eq 'webgrade') {
4199: $currentstring = $token->[2];
4200: }
4201: return $currentstring;
4202: }
4203:
4204: #-- <thead> tag (end tag optional)
4205: sub start_thead {
4206: my ($target,$token) = @_;
4207: my $currentstring = '';
4208: if ($target eq 'web' || $target eq 'webgrade') {
4209: $currentstring = $token->[4];
4210: }
4211: return $currentstring;
4212: }
4213:
4214: sub end_thead {
4215: my ($target,$token) = @_;
4216: my $currentstring = '';
4217: if ($target eq 'web' || $target eq 'webgrade') {
4218: $currentstring = $token->[2];
4219: }
4220: return $currentstring;
4221: }
4222:
4223: #-- <var> tag
4224: sub start_var {
4225: my ($target,$token) = @_;
4226: my $currentstring = '';
4227: if ($target eq 'web' || $target eq 'webgrade') {
4228: $currentstring = $token->[4];
4229: } elsif ($target eq 'tex') {
4230: $currentstring = '\textit{';
4231: }
4232: return $currentstring;
4233: }
4234:
4235: sub end_var {
4236: my ($target,$token) = @_;
4237: my $currentstring = '';
4238: if ($target eq 'web' || $target eq 'webgrade') {
4239: $currentstring = $token->[2];
4240: } elsif ($target eq 'tex') {
4241: $currentstring = '}';
4242: }
4243: return $currentstring;
4244: }
4245:
4246: #-- <wbr> tag (end tag forbidden)
4247: sub start_wbr {
4248: my ($target,$token) = @_;
4249: my $currentstring = '';
4250: if ($target eq 'web' || $target eq 'webgrade') {
4251: $currentstring = $token->[4];
4252: }
4253: return $currentstring;
4254: }
4255:
4256: sub end_wbr {
4257: my ($target,$token) = @_;
4258: my $currentstring = '';
4259: if ($target eq 'web' || $target eq 'webgrade') {
4260: $currentstring = $token->[2];
4261: }
4262: return $currentstring;
4263: }
4264:
4265: #-- <hideweboutput> tag
4266: sub start_hideweboutput {
4267: my ($target,$token) = @_;
4268: if ($target eq 'web' || $target eq 'webgrade') {
4269: &Apache::lonxml::startredirection();
4270: }
4271: return '';
4272: }
4273:
4274: sub end_hideweboutput {
4275: my ($target,$token) = @_;
4276: my $currentstring = '';
4277: if ($target eq 'web' || $target eq 'webgrade') {
4278: $currentstring = &Apache::lonxml::endredirection();
4279: }
4280: return '';
4281: }
4282:
4283:
4284: sub image_replication {
4285: my $src = shift;
4286: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4287: #replicates eps or ps
4288: my $epssrc = my $pssrc = $src;
4289: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4290: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4291: if (not -e $epssrc && not -e $pssrc) {
4292: my $result=&Apache::lonnet::repcopy($epssrc);
4293: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4294: }
4295: return '';
4296: }
4297: #
4298: # Get correct sizing parameter for an image given
4299: # it's initial ht. and wid. This allows sizing of
4300: # images that are generated on-the-fly (e.g. gnuplot)
4301: # as well as serving as a utility for image_size.
4302: #
4303: # Parameter:
4304: # height_param
4305: # width_param - Initial picture dimensions.
4306: # scaling - A scale factor.
4307: # parstack, - the current stack of tag attributes
4308: # from the xml parser
4309: # safeeval, - pointer to the safespace
4310: # depth, - from what level in the stack to look for attributes
4311: # (assumes -1 if unspecified)
4312: # cis - look for attrubutes case insensitively
4313: # (assumes false)
4314: #
4315: # Returns:
4316: # height, width - new dimensions.
4317: #
4318: sub resize_image {
4319: my ($height_param, $width_param, $scaling,
4320: $parstack, $safeeval, $depth, $cis) = @_;
4321:
4322: # First apply the scaling...
4323:
4324: $height_param = $height_param * $scaling;
4325: $width_param = $width_param * $scaling;
4326:
4327: #do we have any specified LaTeX size of the picture?
4328: my $toget='TeXwidth';
4329: if ($cis) {
4330: $toget=lc($toget);
4331: }
4332: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4333: $safeeval,$depth,$cis);
4334: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4335: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4336: $safeeval,$depth,$cis);
4337: #do we have any specified web size of the picture?
4338: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4339: $depth,1);
4340: if ($TeXwidth) {
4341: my $old_width_param=$width_param;
4342: if ($TeXwidth=~/(\d+)\s*\%/) {
4343: $width_param = $1*$env{'form.textwidth'}/100;
4344: } else {
4345: $width_param = $TeXwidth;
4346: }
4347: if ($TeXheight) {
4348: $height_param = $TeXheight;
4349: } elsif ($old_width_param) {
4350: $height_param=$TeXwidth/$old_width_param*$height_param;
4351: }
4352: } elsif ($TeXheight) {
4353: $height_param = $TeXheight;
4354: if ($height_param) {
4355: $width_param = $TeXheight/$height_param*$width_param;
4356: }
4357: } elsif ($width) {
4358: my $old_width_param=$width_param;
4359: $width_param = $width*$scaling;
4360: if ($old_width_param) {
4361: $height_param=$width_param/$old_width_param*$height_param;
4362: }
4363: }
4364: if ($width_param > $env{'form.textwidth'}) {
4365: my $old_width_param=$width_param;
4366: $width_param =0.95*$env{'form.textwidth'};
4367: if ($old_width_param) {
4368: $height_param=$width_param/$old_width_param*$height_param;
4369: }
4370: }
4371:
4372: return ($height_param, $width_param);
4373: }
4374:
4375: sub image_size {
4376: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4377:
4378: #size of image from gif/jpg/jpeg/png
4379: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4380: if (-e $ressrc) {
4381: $src = $ressrc;
4382: }
4383: my $image = Image::Magick->new;
4384: my $current_figure = $image->Read($src);
4385: my $width_param = $image->Get('width');
4386: my $height_param = $image->Get('height');
4387: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4388: undef($image);
4389:
4390: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4391: $scaling, $parstack, $safeeval,
4392: $depth, $cis);
4393:
4394: return ($height_param, $width_param);
4395: }
4396:
4397: sub image_width {
4398: my ($height, $width) = &image_size(@_);
4399: return $width;
4400: }
4401: # Not yet 100% sure this is correct in all circumstances..
4402: # due to my uncertainty about mods to image_size.
4403: #
4404: sub image_height {
4405: my ($height, $width) = &image_size(@_);
4406: return $height;
4407: }
4408:
4409: sub get_eps_image {
4410: my ($src)=@_;
4411: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4412:
4413: # In order to prevent the substitution of the alt text, we need to
4414: # be sure the orig_src file is on system now so:
4415:
4416: if (! -e $orig_src) {
4417: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4418: }
4419: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4420: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4421: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4422: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4423: &Apache::lonxml::debug("Filelocation gives: $src");
4424: if (! -e $src) {
4425: &Apache::lonxml::debug("$src does not exist");
4426: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4427: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4428: #if replication failed try to find ps file
4429: $src=~s/\.eps$/\.ps/;
4430: &Apache::lonxml::debug("Now looking for $src");
4431: #if no ps file try to replicate it.
4432: my $didrepcopy = &Apache::lonnet::repcopy($src);
4433: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4434: if ( (not -e $src) ||
4435: ($didrepcopy ne 'ok')) {
4436: &Apache::lonxml::debug("Failed to find or replicate $src");
4437:
4438: #if replication failed try to produce eps file dynamically
4439: $src=~s/\.ps$/\.eps/;
4440: my $temp_file;
4441: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4442: my $newsrc=$orig_src;
4443: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4444: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4445: print FILE ("$newsrc\n");
4446: close(FILE);
4447: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4448: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4449: if ($sext ne "") { # Put the ext. back in to uniquify.
4450: $src =~ s/\.eps$/$sext.eps/;
4451: }
4452:
4453: }
4454:
4455: }
4456: } else {
4457: # If the postscript file has spaces in its name,
4458: # LaTeX will gratuitiously vomit. Therefore
4459: # queue such files for copy with " " replaced by "_".
4460: # printout.pm will know them by their .ps or .eps extensions.
4461: my $newsrc = $orig_src;
4462: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4463: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4464: print FILE "$src\n";
4465: close FILE;
4466: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4467: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4468: }
4469: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4470: $path =~ s/ /\_/g;
4471: $file =~ s/ /\_/g;
4472: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4473: return ($path.'/',$file);
4474: }
4475:
4476: sub eps_generation {
4477: my ($src,$file,$width_param) = @_;
4478: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4479: my $temp_file = Apache::File->new('>>'.$filename);
4480: print $temp_file "$src\n";
4481: my $newsrc = $src;
4482: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4483: $newsrc=~s{/home/httpd/html/res}{};
4484: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4485: $newsrc=~s{/\./}{/};
4486: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4487: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4488: $newsrc=~s{/home/httpd/lonUsers}{};
4489: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4490: }
4491: if ($newsrc=~m{/userfiles/}) {
4492: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4493: } else {
4494: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4495: }
4496: }
4497:
4498: sub file_path {
4499: my $src=shift;
4500: my ($file,$path);
4501: if ($src =~ m!(.*)/([^/]*)$!) {
4502: $file = $2;
4503: $path = $1.'/';
4504: }
4505: return $file,$path;
4506: }
4507: # Converts a measurement in to mm from any of
4508: # the other valid LaTeX units of measure.
4509: # If the units of measure are missing from the
4510: # parameter, it is assumed to be in and returned
4511: # with mm units of measure
4512: sub recalc {
4513: my $argument = shift;
4514: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4515: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4516: my $value=$1;
4517: my $units=$2;
4518: if ($units eq 'cm') {
4519: $value*=10;
4520: } elsif ($units eq 'in') {
4521: $value*=25.4;
4522: } elsif ($units eq 'pc') {
4523: $value*=(25.4*12/72.27);
4524: } elsif ($units eq 'pt') {
4525: $value*=(25.4/72.27);
4526: }
4527: return $value.' mm';
4528: }
4529:
4530: sub LATEX_length {
4531: my $garbage=shift;
4532: $garbage=~s/^\s+$//;
4533: $garbage=~s/^\s+(\S.*)/$1/;#space before
4534: $garbage=~s/(.*\S)\s+$/$1/;#space after
4535: $garbage=~s/(\s)+/$1/;#only one space
4536: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4537: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4538: $garbage=~s/([^\\])\$/$1/g;#$
4539: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4540: $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;
4541: $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;
4542: $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;
4543: $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;
4544: $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;
4545: $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;
4546: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4547: #remove some other LaTeX command
4548: $garbage=~s|\\(\w+)\\|\\|g;
4549: $garbage=~s|\\(\w+)(\s*)|$2|g;
4550: $garbage=~s|\+|11|g;
4551: my $value=length($garbage);
4552: return $value;
4553: }
4554:
4555: # Wrap image 'stuff' inside of the LaTeX required to implement
4556: # alignment:
4557: # align_tex_image(align, latex_rendering, image)
4558: # Where:
4559: # align - The HTML alignment specification.
4560: # latex_rendering - rendering hint for latex.
4561: # image - The LaTeX needed to insert the image itsef.
4562: # width,height - dimensions of the image.
4563: # Returns:
4564: # The 1/2 wrapped image and the stuff required to close the
4565: # wrappage. This allows e.g. randomlabel to insert more stuff
4566: # into the closure.
4567: #
4568: sub align_latex_image {
4569: my ($align, $latex_rendering, $image, $width, $height) = @_;
4570: my $currentstring; # The 1/2 wrapped image.
4571: my $closure; # The closure of the wrappage.
4572:
4573: # if it's none just return it back
4574: if ($latex_rendering eq 'none') {
4575: return ($image,'');
4576: }
4577:
4578: # If there's an alignment specification we need to honor it here.
4579: # For the horizontal alignments, we will also honor the
4580: # value of the latex specfication. The default is parbox,
4581: # and that's used for illegal values too.
4582: #
4583: # Even though we set a default alignment value, the user
4584: # could have given us an illegal value. In that case we
4585: # just use the default alignment of bottom..
4586: $currentstring = "\n% figurewrapping \n";
4587: if ($align eq "top") {
4588: $currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
4589: $closure = '}';
4590: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4591: my $offset = $height/2;
4592: $currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
4593: $closure = '}';
4594: } elsif ($align eq "left") {
4595: if ($latex_rendering eq "parpic") {
4596: $currentstring .= '\parpic[l]{'.$image;
4597: $closure = '}';
4598: } elsif ($latex_rendering eq "parbox") {
4599: $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
4600: .$image;
4601: $closure = '\end{minipage}';
4602: } elsif ($latex_rendering eq "wrapfigure"
4603: || $latex_rendering ne 'none') { # wrapfig render
4604: $currentstring .=
4605: '\begin{wrapfigure}{l}{'.$width.'mm}'
4606: .'\scalebox{1.0}{'.$image;
4607: $closure = '}\end{wrapfigure}';
4608: }
4609: } elsif ($align eq "right") {
4610: if ($latex_rendering eq "parpic") {
4611: $currentstring .= '\parpic[r]{'.$image;
4612: $closure = '}';
4613: } elsif ($latex_rendering eq "parbox") {
4614: $currentstring .= '\begin{minipage}[r]{'.$width.'mm}'
4615: .$image;
4616: $closure = '\end{minipage}';
4617: } elsif ($latex_rendering eq "wrapfigure"
4618: || $latex_rendering ne 'none') { # wrapfig render
4619: $currentstring .=
4620: '\begin{wrapfigure}{r}{'.$width.'mm}'
4621: .'\scalebox{1.0}{'.$image;
4622: $closure = '}\end{wrapfigure}';
4623: }
4624: } else { # Bottom is also default.
4625: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4626: $currentstring .= "{$image";
4627: $closure = '}';
4628: }
4629: $currentstring .= "\n% end wrappage\n";
4630: $closure = "\n% Begin closure\n".$closure."\n% End closure\n";
4631: return ($currentstring, $closure);
4632: }
4633:
4634: # is_inside_of $tagstack $tag
4635: # This sub returns true if the current state of Xml processing
4636: # is inside of the tag.
4637: # Parameters:
4638: # tagstack - The tagstack from the parser.
4639: # tag - The tag (without the <>'s.).
4640: # Sample usage:
4641: # if (is_inside_of($tagstack "table")) {
4642: # # I'm in a table....
4643: # }
4644: sub is_inside_of {
4645: my ($tagstack, $tag) = @_;
4646: my @stack = @$tagstack;
4647: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4648: if ($stack[$i] eq $tag) {
4649: return 1;
4650: }
4651: }
4652: return 0;
4653: }
4654:
4655:
4656: 1;
4657: __END__
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