1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.388 2008/05/05 10:41:29 foxr Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: use LONCAPA();
52: # use Data::Dumper;
53:
54: BEGIN {
55:
56: &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'));
57:
58: }
59:
60: #
61: # Dumps all elements of the table structure.
62: # Need this 'cause evidently when given an array, Data::Dumper only seems
63: # to dump element 0.
64: #
65: #sub debug_dump_table {
66: # my $lastrow = $#Apache::londefdef::table;
67: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
68: # my $row;
69: # for ($row =0; $row <= $lastrow; $row++ ) {
70: # my $text = Dumper($Apache::londefdef::table[$row]);
71: # &Apache::lonnet::logthis("table [ $row ]".$text);
72: # }
73: #}
74: sub initialize_londefdef {
75: $Apache::londefdef::TD_redirection=0;
76: @Apache::londefdef::table = ();
77: $Apache::londefdef::select=0;
78: undef(@Apache::londefdef::description);
79: @Apache::londefdef::DD=(0);
80: @Apache::londefdef::DT=(0);
81: @Apache::londefdef::seenDT=(0);
82: $Apache::londefdef::list_index=0;
83: undef($Apache::londefdef::head);
84: undef($Apache::londefdef::title);
85: }
86:
87: #======================= TAG SUBROUTINES =====================
88: #-- <output>
89: sub start_output {
90: my ($target) = @_;
91: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
92: return '';
93: }
94: sub end_output {
95: my ($target) = @_;
96: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
97: return '';
98: }
99: #-- <m> tag
100: sub start_m {
101: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
102: my $currentstring = '';
103: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
104: if ($target eq 'web' || $target eq 'analyze') {
105: &Apache::lonxml::debug("M is starting with:$inside:");
106: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
107: if ($eval eq 'on') {
108: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
109: #&Apache::lonxml::debug("M is evaulated to:$inside:");
110: }
111: my $tex = $inside;
112: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
113: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
114: if ($Apache::lontexconvert::errorstring) {
115: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
116: $tex = &HTML::Entities::encode($tex,'<>&"');
117: my ($linenumber) =
118: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
119: if (defined($linenumber)) {
120: my @tex=split("\n",$tex);
121: $tex[$linenumber]='<b><font color="red">'.
122: $tex[$linenumber].'</font></b>';
123: $tex=join("\n",@tex);
124: }
125: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
126: $Apache::lontexconvert::errorstring='';
127: }
128: #&Apache::lonxml::debug("M is ends with:$currentstring:");
129: $Apache::lonxml::post_evaluate=0;
130: } elsif ($target eq 'tex') {
131:
132: $currentstring = $inside;
133: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
134: if ($eval eq 'on') {
135: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
136: }
137: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
138: # detect simple math mode entry exits, and convert them
139: # to use \ensuremath ... unless there's a \verb inside.
140: if (! ($currentstring=~/\\verb/)) {
141: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
142: $currentstring=~s/^(\s*)\$/$1/;
143: $currentstring=~s/\$(\s*)$/$1/;
144: $currentstring='\ensuremath{'.$currentstring.'}';
145: }
146: }
147: $Apache::lonxml::post_evaluate=0;
148: }
149: return $currentstring;
150: }
151:
152: sub end_m {
153: my ($target,$token) = @_;
154: my $currentstring = '';
155: if ($target eq 'tex') {
156: $currentstring = "";
157: }
158: return $currentstring;
159: }
160:
161: sub start_tthoption {
162: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
163: my $result;
164: if ($target eq 'web' || $target eq 'webgrade') {
165: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
166: $style);
167: $inside=~s/^\s*//;
168: if ($env{'browser.mathml'}) {
169: &tth::ttmoptions($inside);
170: } else {
171: &tth::tthoptions($inside);
172: }
173: }
174: return $result;
175: }
176:
177: sub end_tthoption {
178: my ($target,$token) = @_;
179: my $result;
180: return $result;
181: }
182:
183: #-- <html> tag (end tag optional)
184: sub start_html {
185: my ($target,$token) = @_;
186: my $currentstring = '';
187: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
188: # start_body() takes care of emitting the <html>
189: } elsif ($target eq 'tex') {
190: $currentstring .=
191: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
192: if (($env{'form.latex_type'}=~'batchmode') ||
193: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
194: $currentstring .= '\newcommand{\keephidden}[1]{}'.
195: '\renewcommand{\deg}{$^{\circ}$}'.
196: '\usepackage{multirow}'.
197: '\usepackage{longtable}'.
198: '\usepackage{textcomp}'.
199: '\usepackage{makeidx}'.
200: '\usepackage[dvips]{graphicx}'.
201: '\usepackage{wrapfig}'.
202: '\usepackage{picins}'.
203: '\usepackage[T1]{fontenc}'."\n".
204: '\usepackage[postscript]{ucs}'."\n".
205: '\usepackage[utf8x]{inputenc}'."\n".
206: '\usepackage{pifont}' ."\n".
207: '\usepackage{latexsym}'."\n".
208: '\usepackage{epsfig}'.
209: '\usepackage{calc}'.
210: '\usepackage{amsmath}'.
211: '\usepackage{amssymb}'.
212: '\usepackage{amsfonts}'.
213: '\usepackage{amsthm}'.
214: '\usepackage{amscd}'.
215: '\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}}'.
216: '\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}}';
217: }
218: return $currentstring;
219: }
220:
221: sub end_html {
222: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
223: my $currentstring = '';
224: if ($target eq 'web' || $target eq 'webgrade') {
225: # end_body takes care of the </html>
226: }
227: return $currentstring;
228: }
229:
230: #-- <head> tag (end tag optional)
231: sub start_head {
232: my ($target,$token) = @_;
233: my $currentstring = '';
234: if ($target eq 'web' || $target eq 'webgrade') {
235: &Apache::lonxml::startredirection();
236: }
237: return $currentstring;
238: }
239:
240: sub end_head {
241: my ($target,$token) = @_;
242: my $currentstring = '';
243: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
244: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
245: # in case there is a </head> but no <head>
246: if ($Apache::lonxml::redirection) {
247: $Apache::londefdef::head = &Apache::lonxml::endredirection();
248: }
249: }
250: return $currentstring;
251: }
252:
253: #-- <map> tag (end tag required)
254: sub start_map {
255: my ($target,$token) = @_;
256: my $currentstring = '';
257: if ($target eq 'web' || $target eq 'webgrade') {
258: $currentstring = $token->[4];
259: }
260: return $currentstring;
261: }
262:
263: sub end_map {
264: my ($target,$token) = @_;
265: my $currentstring = '';
266: if ($target eq 'web' || $target eq 'webgrade') {
267: $currentstring = $token->[2];
268: }
269: return $currentstring;
270: }
271:
272: #-- <select> tag (end tag required)
273: sub start_select {
274: my ($target,$token) = @_;
275: my $currentstring = '';
276: if ($target eq 'web' || $target eq 'webgrade') {
277: $currentstring = $token->[4];
278: } elsif ($target eq 'tex') {
279: $Apache::londefdef::select=0;
280: }
281: return $currentstring;
282: }
283:
284: sub end_select {
285: my ($target,$token) = @_;
286: my $currentstring = '';
287: if ($target eq 'web' || $target eq 'webgrade') {
288: $currentstring = $token->[2];
289: }
290: return $currentstring;
291: }
292:
293: #-- <option> tag (end tag optional)
294: sub start_option {
295: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
296: my $currentstring = '';
297: if ($target eq 'web' || $target eq 'webgrade') {
298: $currentstring = $token->[4];
299: } elsif ($target eq 'tex') {
300: $Apache::londefdef::select++;
301: if ($Apache::londefdef::select == 1) {
302: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
303: } else {
304: $currentstring='\keephidden{';
305: }
306: }
307: return $currentstring;
308: }
309:
310: sub end_option {
311: my ($target,$token) = @_;
312: my $currentstring = '';
313: if ($target eq 'web' || $target eq 'webgrade') {
314: $currentstring = $token->[2];
315: } elsif ($target eq 'tex') {
316: $currentstring='}';
317: }
318: return $currentstring;
319: }
320:
321: #-- <input> tag (end tag forbidden)
322: sub start_input {
323: my ($target,$token) = @_;
324: my $currentstring = '';
325: if ($target eq 'web' || $target eq 'webgrade') {
326: $currentstring = $token->[4];
327: }
328: return $currentstring;
329: }
330:
331: sub end_input {
332: my ($target,$token) = @_;
333: my $currentstring = '';
334: if ($target eq 'web' || $target eq 'webgrade') {
335: $currentstring = $token->[2];
336: }
337: return $currentstring;
338: }
339:
340: #-- <textarea> tag (end tag required)
341: sub start_textarea {
342: my ($target,$token) = @_;
343: my $currentstring = '';
344: if ($target eq 'web' || $target eq 'webgrade') {
345: $currentstring = $token->[4];
346: }
347: return $currentstring;
348: }
349:
350: sub end_textarea {
351: my ($target,$token) = @_;
352: my $currentstring = '';
353: if ($target eq 'web' || $target eq 'webgrade') {
354: $currentstring = $token->[2];
355: }
356: return $currentstring;
357: }
358:
359: #-- <form> tag (end tag required)
360: sub start_form {
361: my ($target,$token) = @_;
362: my $currentstring = '';
363: if ($target eq 'web' || $target eq 'webgrade') {
364: $currentstring = $token->[4];
365: }
366: return $currentstring;
367: }
368:
369: sub end_form {
370: my ($target,$token) = @_;
371: my $currentstring = '';
372: if ($target eq 'web' || $target eq 'webgrade') {
373: $currentstring = $token->[2];
374: }
375: return $currentstring;
376: }
377:
378: #-- <title> tag (end tag required)
379: sub start_title {
380: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
381: my $currentstring = '';
382: if ($target eq 'web' || $target eq 'webgrade') {
383: $Apache::londefdef::title =
384: &Apache::lonxml::get_all_text('/title',$parser,$style);
385: } elsif ($target eq 'tex') {
386: $currentstring .= '\keephidden{Title of the document: '
387: }
388: if ($target eq 'meta') {
389: $currentstring='<title>';
390: &start_output($target);
391: }
392: return $currentstring;
393: }
394:
395: sub end_title {
396: my ($target,$token) = @_;
397: my $currentstring = '';
398: if ($target eq 'web' || $target eq 'webgrade') {
399: # start_title takes care of swallowing the title
400: } elsif ($target eq 'tex') {
401: $currentstring .= '}';
402: }
403: if ($target eq 'meta') {
404: &end_output($target);
405: $currentstring='</title>';
406: }
407: return $currentstring;
408: }
409:
410: #-- <meta> tag (end tag forbidden)
411: sub start_meta {
412: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
413: my $currentstring = '';
414: if ($target eq 'web' || $target eq 'webgrade') {
415: my $args='';
416: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
417: if ($args eq '') {
418: &Apache::lonxml::get_all_text("/meta",$parser,$style);
419: } else {
420: $currentstring = $token->[4];
421: }
422: } elsif ($target eq 'meta') {
423: unless (&Apache::lonxml::get_param
424: ('http-equiv',$parstack,$safeeval,undef,1)) {
425: my $name=$token->[2]->{'name'};
426: $name=~tr/A-Z/a-z/;
427: $name=~s/\s/\_/gs;
428: $name=~s/\W//gs;
429: if ($name) {
430: $currentstring='<'.$name;
431: my $display=&Apache::lonxml::get_param
432: ('display',$parstack,$safeeval,undef,1);
433: if ($display) {
434: $display=~s/\"/\'/g;
435: $currentstring.=' display="'.$display.'"';
436: }
437: $currentstring.='>'.
438: &Apache::lonxml::get_param
439: ('content',$parstack,$safeeval,undef,1).
440: '</'.$name.'>';
441: }
442: my $display=&Apache::lonxml::get_param
443: ('display',$parstack,$safeeval,undef,1);
444: if ($display) {
445: $display=&HTML::Entities::encode($display,'<>&"');
446: $currentstring.='<'.$name.'.display>'.$display.
447: '</'.$name.'.display>';
448: }
449: }
450: } elsif ($target eq 'tex') {
451: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
452: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
453: if ((not defined $content) && (not defined $name)) {
454: &Apache::lonxml::startredirection();
455: }
456: } elsif ($target eq 'edit') {
457: $currentstring .= &Apache::edit::tag_start($target,$token);
458: $currentstring .= &Apache::edit::text_arg('Name:','name',$token,30);
459: $currentstring .= &Apache::edit::text_arg('Content:','content',$token,70);
460: $currentstring .= &Apache::edit::end_row();
461: } elsif ($target eq 'modified') {
462: my $constructtag =
463: &Apache::edit::get_new_args($token,$parstack,$safeeval,
464: 'name','content');
465: if ($constructtag) { $currentstring = &Apache::edit::rebuild_tag($token); }
466: }
467: return $currentstring;
468: }
469:
470: sub end_meta {
471: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
472: my $currentstring = '';
473: if ($target eq 'web' || $target eq 'webgrade') {
474: my $args='';
475: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
476: if ($args ne '') {
477: $currentstring = $token->[4];
478: }
479: } elsif ($target eq 'tex') {
480: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
481: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
482: if ((not defined $content) && (not defined $name)) {
483: &Apache::lonxml::endredirection();
484: }
485: }
486: return $currentstring;
487: }
488:
489: sub insert_meta {
490: return '
491: <meta />';
492: }
493:
494: # accessrule
495: sub start_accessrule {
496: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
497: my $currentstring = '';
498: my $eff =&Apache::lonxml::get_param('effect',$parstack,$safeeval,undef,1);
499: my $realm=&Apache::lonxml::get_param('realm', $parstack,$safeeval,undef,1);
500: my $role =&Apache::lonxml::get_param('role', $parstack,$safeeval,undef,1);
501: my $type =&Apache::lonxml::get_param('type', $parstack,$safeeval,undef,1);
502:
503: my ($dom,$crs,$sec,$separator);
504: if ($type eq 'user') {
505: ($dom,$crs,$sec)=split(m{/},$realm);
506: $crs = &LONCAPA::clean_username($crs);
507: $separator = '/';
508: } else {
509: ($dom,$crs,$sec)=split(/\_/,$realm);
510: $crs = &LONCAPA::clean_courseid($crs);
511: $separator = '_';
512: }
513: $dom = &LONCAPA::clean_domain($dom);
514:
515: $sec =~s/\W//;
516: $realm = $dom;
517: if ($crs =~ /\S/) { $realm .= $separator.$crs; }
518: if ($sec =~ /\S/) { $realm .= $separator.$sec; }
519: $role=~s/\W//g;
520:
521: if ($target eq 'web') {
522: my $args='';
523: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
524: if ($args eq '') {
525: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
526: } else {
527: $currentstring = $token->[4];
528: }
529: }
530: if ($target eq 'meta') {
531: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
532: }
533: return $currentstring;
534: }
535:
536: sub end_accessrule {
537: my ($target,$token,$tagstack,$parstack,$parser) = @_;
538: my $currentstring = '';
539: if ($target eq 'web') {
540: my $args='';
541: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
542: if ($args ne '') {
543: $currentstring = $token->[4];
544: }
545: }
546: return $currentstring;
547: }
548:
549: sub generate_css_links {
550: my $links;
551: my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
552: if ($css_href =~ /\S/) {
553: &Apache::lonxml::extlink($css_href);
554: $links .=
555: '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
556: }
557: return $links;
558: }
559:
560: #-- <body> tag (end tag required)
561: sub start_body {
562: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
563: my $currentstring = '';
564:
565: if ($target eq 'web' || $target eq 'webgrade') {
566: if ($Apache::lonhomework::parsing_a_problem) {
567: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
568: return '';
569: }
570:
571: if (&is_inside_of($tagstack, "head")) {
572: &end_head(@_);
573: }
574:
575: my $extra_head = &generate_css_links();
576:
577: $currentstring =
578: &Apache::loncommon::start_page($Apache::londefdef::title,
579: $Apache::londefdef::head
580: .$extra_head,
581: {'add_entries' => $token->[2],
582: 'no_title' => 1,
583: 'force_register' => 1});
584:
585: if ($env{'request.state'} ne 'published') {
586: $currentstring.=&Apache::lonmenu::constspaceform();
587: $currentstring.=&Apache::londefdef::edit_controls();
588: }
589: $currentstring.=&Apache::lonxml::message_location();
590: } elsif ($target eq 'tex') {
591: $currentstring = '\begin{document}';
592: }
593: return $currentstring;
594: }
595:
596: sub edit_controls {
597: my $result .= (<<EDITBUTTON);
598: <form method="post">
599: <input type="submit" name="editmode" accesskey="e" value="Edit" />
600: </form>
601: <br />
602: EDITBUTTON
603: return $result;
604: }
605:
606: sub end_body {
607: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
608: my $currentstring = &end_p(); # Close off unclosed <p>
609: if ($target eq 'web' || $target eq 'webgrade') {
610: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
611: } elsif ($target eq 'tex') {
612: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
613: }
614: return $currentstring;
615: }
616:
617: # \begin{center} causes a new paragprah spacing that looks odd inside
618: # of a table cell. Same at the end of a \center but with a slightly
619: # larger space .. hence center_correction and center_end_correction.
620: #
621: sub center_correction { return '\vspace*{-6 mm}'; }
622: sub center_end_correction { return '\vspace*{-7 mm}'; }
623:
624: #-- <center> tag (end tag required)
625: sub start_center {
626: my ($target,$token,$tagstack) = @_;
627: my $currentstring = &end_p(); # Close off any prior para.
628: if ($target eq 'web' || $target eq 'webgrade') {
629: $currentstring .= $token->[4];
630: } elsif ($target eq 'tex') {
631: if (&is_inside_of($tagstack, "table")) {
632: $currentstring .= ¢er_correction();
633: }
634: $currentstring .= '\begin{center}';
635: }
636: return $currentstring;
637: }
638:
639: sub end_center {
640: my ($target,$token,$tagstack) = @_;
641: my $currentstring = '';
642: if ($target eq 'web' || $target eq 'webgrade') {
643: $currentstring = $token->[2];
644: } elsif ($target eq 'tex') {
645: $currentstring = '\end{center}';
646: if (&is_inside_of($tagstack, "table")) {
647: $currentstring .= ¢er_end_correction();
648: }
649: }
650: return $currentstring;
651: }
652:
653: #-- <b> tag (end tag required)
654: # NOTE: In TeX mode disables internal <p>
655: sub start_b {
656: my ($target,$token) = @_;
657: my $currentstring = '';
658: if ($target eq 'web' || $target eq 'webgrade') {
659: $currentstring = $token->[4];
660: } elsif ($target eq 'tex') {
661: &disable_para();
662: $currentstring .= '\textbf{';
663: }
664: return $currentstring;
665: }
666:
667: sub end_b {
668: my ($target,$token) = @_;
669: my $currentstring = '';
670: if ($target eq 'web' || $target eq 'webgrade') {
671: $currentstring = $token->[2];
672: } elsif ($target eq 'tex') {
673: &enable_para();
674: $currentstring = '}';
675: }
676: return $currentstring;
677: }
678:
679: #-- <strong> tag (end tag required)
680: # NOTE: in TeX mode disables internal <p>
681: sub start_strong {
682: my ($target,$token) = @_;
683: my $currentstring = '';
684: if ($target eq 'web' || $target eq 'webgrade') {
685: $currentstring = $token->[4];
686: } elsif ($target eq 'tex') {
687: &disable_para();
688: $currentstring = '\textbf{';
689: }
690: return $currentstring;
691: }
692:
693: sub end_strong {
694: my ($target,$token) = @_;
695: my $currentstring = '';
696: if ($target eq 'web' || $target eq 'webgrade') {
697: $currentstring = $token->[2];
698: } elsif ($target eq 'tex') {
699: &enable_para();
700: $currentstring = '}';
701: }
702: return $currentstring;
703: }
704:
705: #-- <h1> tag (end tag required)
706: sub start_h1 {
707: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
708: my $currentstring = &end_p(); # Close off any prior para.
709: if ($target eq 'web' || $target eq 'webgrade') {
710: $currentstring .= $token->[4];
711: } elsif ($target eq 'tex') {
712: my $pre;
713: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
714: if ($align eq 'center') {
715: $pre='\begin{center}';
716: } elsif ($align eq 'left') {
717: $pre='\rlap{';
718: } elsif ($align eq 'right') {
719: $pre=' \hfill \llap{';
720: }
721: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
722: if (not defined $TeXsize) {$TeXsize="large";}
723: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
724: } elsif ($target eq 'meta') {
725: $currentstring.='<subject>';
726: &start_output($target);
727: }
728: return $currentstring;
729: }
730:
731: sub end_h1 {
732: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
733: my $currentstring = '';
734: if ($target eq 'web' || $target eq 'webgrade') {
735: $currentstring .= $token->[2];
736: } elsif ($target eq 'tex') {
737: my $post='\vskip 0 mm ';
738: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
739: if ($align eq 'center') {
740: $post='\end{center}';
741: } elsif ($align eq 'left') {
742: $post='} \hfill'.'\vskip 0 mm ';
743: } elsif ($align eq 'right') {
744: $post='}'.'\vskip 0 mm ';
745: }
746: $currentstring .= '}}'.$post;
747: } elsif ($target eq 'meta') {
748: &end_output($target);
749: $currentstring='</subject>';
750: }
751: return $currentstring;
752: }
753:
754: #-- <h2> tag
755: sub start_h2 {
756: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
757: my $currentstring = &end_p(); # Close off any prior para.
758: if ($target eq 'web' || $target eq 'webgrade') {
759: $currentstring .= $token->[4];
760: } elsif ($target eq 'tex') {
761: my $pre;
762: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
763: if ($align eq 'center') {
764: $pre='\begin{center}';
765: } elsif ($align eq 'left') {
766: $pre='\rlap{';
767: } elsif ($align eq 'right') {
768: $pre=' \hfill \llap{';
769: }
770: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
771: if (not defined $TeXsize) {$TeXsize="large";}
772: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
773: }
774: return $currentstring;
775: }
776:
777: sub end_h2 {
778: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
779: my $currentstring = '';
780: if ($target eq 'web' || $target eq 'webgrade') {
781: $currentstring .= $token->[2];
782: } elsif ($target eq 'tex') {
783: my $post='\vskip 0 mm ';
784: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
785: if ($align eq 'center') {
786: $post='\end{center}';
787: } elsif ($align eq 'left') {
788: $post='} \hfill'.'\vskip 0 mm ';
789: } elsif ($align eq 'right') {
790: $post='}'.'\vskip 0 mm ';
791: }
792: $currentstring .= '}}'.$post;
793: }
794: return $currentstring;
795: }
796:
797: #-- <h3> tag
798: sub start_h3 {
799: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
800: my $currentstring = &end_p(); # Close off any prior para.
801: if ($target eq 'web' || $target eq 'webgrade') {
802: $currentstring .= $token->[4];
803: } elsif ($target eq 'tex') {
804: my $pre;
805: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
806: if ($align eq 'center') {
807: $pre='\begin{center}';
808: } elsif ($align eq 'left') {
809: $pre='\rlap{';
810: } elsif ($align eq 'right') {
811: $pre=' \hfill \llap{';
812: }
813: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
814: if (not defined $TeXsize) {$TeXsize="large";}
815: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
816: }
817: return $currentstring;
818: }
819:
820: sub end_h3 {
821: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
822: my $currentstring = '';
823: if ($target eq 'web' || $target eq 'webgrade') {
824: $currentstring .= $token->[2];
825: } elsif ($target eq 'tex') {
826: my $post='\vskip 0 mm ';
827: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
828: if ($align eq 'center') {
829: $post='\end{center}';
830: } elsif ($align eq 'left') {
831: $post='} \hfill'.'\vskip 0 mm ';
832: } elsif ($align eq 'right') {
833: $post='}'.'\vskip 0 mm ';
834: }
835: $currentstring .= '}}'.$post;
836: }
837: return $currentstring;
838: }
839:
840: #-- <h4> tag
841: sub start_h4 {
842: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
843: my $currentstring = &end_p(); # Close off any prior para.
844: if ($target eq 'web' || $target eq 'webgrade') {
845: $currentstring .= $token->[4];
846: } elsif ($target eq 'tex') {
847: my $pre;
848: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
849: if ($align eq 'center') {
850: $pre='\begin{center}';
851: } elsif ($align eq 'left') {
852: $pre='\rlap{';
853: } elsif ($align eq 'right') {
854: $pre=' \hfill \llap{';
855: }
856: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
857: if (not defined $TeXsize) {$TeXsize="large";}
858: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
859: }
860: return $currentstring;
861: }
862:
863: sub end_h4 {
864: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
865: my $currentstring = '';
866: if ($target eq 'web' || $target eq 'webgrade') {
867: $currentstring .= $token->[2];
868: } elsif ($target eq 'tex') {
869: my $post='\vskip 0 mm ';
870: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
871: if ($align eq 'center') {
872: $post='\end{center}';
873: } elsif ($align eq 'left') {
874: $post='} \hfill'.'\vskip 0 mm ';
875: } elsif ($align eq 'right') {
876: $post='}'.'\vskip 0 mm ';
877: }
878: $currentstring .= '}}'.$post;
879: }
880: return $currentstring;
881: }
882:
883: #-- <h5> tag
884: sub start_h5 {
885: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
886: my $currentstring = &end_p(); # Close off any prior paras.
887: if ($target eq 'web' || $target eq 'webgrade') {
888: $currentstring .= $token->[4];
889: } elsif ($target eq 'tex') {
890: my $pre;
891: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
892: if ($align eq 'center') {
893: $pre='\begin{center}';
894: } elsif ($align eq 'left') {
895: $pre='\rlap{';
896: } elsif ($align eq 'right') {
897: $pre=' \hfill \llap{';
898: }
899: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
900: if (not defined $TeXsize) {$TeXsize="large";}
901: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
902: }
903: return $currentstring;
904: }
905:
906: sub end_h5 {
907: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
908: my $currentstring = '';
909: if ($target eq 'web' || $target eq 'webgrade') {
910: $currentstring .= $token->[2];
911: } elsif ($target eq 'tex') {
912: my $post='\vskip 0 mm ';
913: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
914: if ($align eq 'center') {
915: $post='\end{center}';
916: } elsif ($align eq 'left') {
917: $post='} \hfill'.'\vskip 0 mm ';
918: } elsif ($align eq 'right') {
919: $post='}'.'\vskip 0 mm ';
920: }
921: $currentstring .= '}}'.$post;
922: }
923: return $currentstring;
924: }
925:
926: #-- <h6> tag
927: sub start_h6 {
928: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
929: my $currentstring = &end_p(); # Close off any prior paras.
930: if ($target eq 'web' || $target eq 'webgrade') {
931: $currentstring .= $token->[4];
932: } elsif ($target eq 'tex') {
933: my $pre;
934: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
935: if ($align eq 'center') {
936: $pre='\begin{center}';
937: } elsif ($align eq 'left') {
938: $pre='\rlap{';
939: } elsif ($align eq 'right') {
940: $pre=' \hfill \llap{';
941: }
942: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
943: if (not defined $TeXsize) {$TeXsize="large";}
944: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
945: }
946: return $currentstring;
947: }
948:
949: sub end_h6 {
950: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
951: my $currentstring = '';
952: if ($target eq 'web' || $target eq 'webgrade') {
953: $currentstring .= $token->[2];
954: } elsif ($target eq 'tex') {
955: my $post='\vskip 0 mm ';
956: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
957: if ($align eq 'center') {
958: $post='\end{center}';
959: } elsif ($align eq 'left') {
960: $post='} \hfill'.'\vskip 0 mm ';
961: } elsif ($align eq 'right') {
962: $post='}'.'\vskip 0 mm ';
963: }
964: $currentstring .= '}}'.$post;
965: }
966: return $currentstring;
967: }
968:
969: #--- <cite> tag (end tag required)
970: sub start_cite {
971: my ($target,$token) = @_;
972: my $currentstring = '';
973: if ($target eq 'web' || $target eq 'webgrade') {
974: $currentstring .= $token->[4];
975: } elsif ($target eq 'tex') {
976: $currentstring .= '\textit{';
977: }
978: return $currentstring;
979: }
980:
981: sub end_cite {
982: my ($target,$token) = @_;
983: my $currentstring = '';
984: if ($target eq 'web' || $target eq 'webgrade') {
985: $currentstring .= $token->[2];
986: } elsif ($target eq 'tex') {
987: $currentstring .= '}';
988: }
989: return $currentstring;
990: }
991:
992: #-- <i> tag (end tag required)
993: sub start_i {
994: my ($target,$token) = @_;
995: my $currentstring = '';
996: if ($target eq 'web' || $target eq 'webgrade') {
997: $currentstring .= $token->[4];
998: } elsif ($target eq 'tex') {
999: $currentstring .= '\textit{';
1000: }
1001: return $currentstring;
1002: }
1003:
1004: sub end_i {
1005: my ($target,$token) = @_;
1006: my $currentstring = '';
1007: if ($target eq 'web' || $target eq 'webgrade') {
1008: $currentstring .= $token->[2];
1009: } elsif ($target eq 'tex') {
1010: $currentstring .= '}';
1011: }
1012: return $currentstring;
1013: }
1014:
1015: #-- <address> tag (end tag required)
1016: sub start_address {
1017: my ($target,$token) = @_;
1018: my $currentstring = '';
1019: if ($target eq 'web' || $target eq 'webgrade') {
1020: $currentstring .= $token->[4];
1021: } elsif ($target eq 'tex') {
1022: $currentstring .= '\textit{';
1023: }
1024: return $currentstring;
1025: }
1026:
1027: sub end_address {
1028: my ($target,$token) = @_;
1029: my $currentstring = '';
1030: if ($target eq 'web' || $target eq 'webgrade') {
1031: $currentstring .= $token->[2];
1032: } elsif ($target eq 'tex') {
1033: $currentstring .= '}';
1034: }
1035: return $currentstring;
1036: }
1037:
1038: #-- <dfn> tag (end tag required)
1039: sub start_dfn {
1040: my ($target,$token) = @_;
1041: my $currentstring = '';
1042: if ($target eq 'web' || $target eq 'webgrade') {
1043: $currentstring .= $token->[4];
1044: } elsif ($target eq 'tex') {
1045: $currentstring .= '\textit{';
1046: }
1047: return $currentstring;
1048: }
1049:
1050: sub end_dfn {
1051: my ($target,$token) = @_;
1052: my $currentstring = '';
1053: if ($target eq 'web' || $target eq 'webgrade') {
1054: $currentstring .= $token->[2];
1055: } elsif ($target eq 'tex') {
1056: $currentstring .= '}';
1057: }
1058: return $currentstring;
1059: }
1060:
1061: #-- <tt> tag (end tag required)
1062: sub start_tt {
1063: my ($target,$token) = @_;
1064: my $currentstring = '';
1065: if ($target eq 'web' || $target eq 'webgrade') {
1066: $currentstring .= $token->[4];
1067: } elsif ($target eq 'tex') {
1068: $currentstring .= '\texttt{';
1069: }
1070: return $currentstring;
1071: }
1072:
1073: sub end_tt {
1074: my ($target,$token) = @_;
1075: my $currentstring = '';
1076: if ($target eq 'web' || $target eq 'webgrade') {
1077: $currentstring .= $token->[2];
1078: } elsif ($target eq 'tex') {
1079: $currentstring .= '}';
1080: }
1081: return $currentstring;
1082: }
1083:
1084: #-- <kbd> tag (end tag required)
1085: sub start_kbd {
1086: my ($target,$token) = @_;
1087: my $currentstring = '';
1088: if ($target eq 'web' || $target eq 'webgrade') {
1089: $currentstring .= $token->[4];
1090: } elsif ($target eq 'tex') {
1091: $currentstring .= '\texttt{';
1092: }
1093: return $currentstring;
1094: }
1095:
1096: sub end_kbd {
1097: my ($target,$token) = @_;
1098: my $currentstring = '';
1099: if ($target eq 'web' || $target eq 'webgrade') {
1100: $currentstring .= $token->[2];
1101: } elsif ($target eq 'tex') {
1102: $currentstring .= '}';
1103: }
1104: return $currentstring;
1105: }
1106:
1107: #-- <code> tag (end tag required)
1108: sub start_code {
1109: my ($target,$token) = @_;
1110: my $currentstring = '';
1111: if ($target eq 'web' || $target eq 'webgrade') {
1112: $currentstring .= $token->[4];
1113: } elsif ($target eq 'tex') {
1114: $currentstring .= '\texttt{';
1115: }
1116: return $currentstring;
1117: }
1118:
1119: sub end_code {
1120: my ($target,$token) = @_;
1121: my $currentstring = '';
1122: if ($target eq 'web' || $target eq 'webgrade') {
1123: $currentstring .= $token->[2];
1124: } elsif ($target eq 'tex') {
1125: $currentstring .= '}';
1126: }
1127: return $currentstring;
1128: }
1129:
1130: #-- <em> tag (end tag required)
1131: sub start_em {
1132: my ($target,$token) = @_;
1133: my $currentstring = '';
1134: if ($target eq 'web' || $target eq 'webgrade') {
1135: $currentstring .= $token->[4];
1136: } elsif ($target eq 'tex') {
1137: $currentstring .= '\emph{';
1138: }
1139: return $currentstring;
1140: }
1141:
1142: sub end_em {
1143: my ($target,$token) = @_;
1144: my $currentstring = '';
1145: if ($target eq 'web' || $target eq 'webgrade') {
1146: $currentstring .= $token->[2];
1147: } elsif ($target eq 'tex') {
1148: $currentstring .= '}';
1149: }
1150: return $currentstring;
1151: }
1152:
1153: #-- <q> tag (end tag required)
1154: sub start_q {
1155: my ($target,$token) = @_;
1156: my $currentstring = '';
1157: if ($target eq 'web' || $target eq 'webgrade') {
1158: $currentstring .= $token->[4];
1159: } elsif ($target eq 'tex') {
1160: $currentstring .= '\emph{';
1161: }
1162: return $currentstring;
1163: }
1164:
1165: sub end_q {
1166: my ($target,$token) = @_;
1167: my $currentstring = '';
1168: if ($target eq 'web' || $target eq 'webgrade') {
1169: $currentstring .= $token->[2];
1170: } elsif ($target eq 'tex') {
1171: $currentstring .= '}';
1172: }
1173: return $currentstring;
1174: }
1175:
1176: # <p> is a bit strange since it does not require a closing </p>
1177: # However in latex, we must often output closing stuff to end
1178: # environments and {}'s etc. Therefore we do all the work
1179: # of figuring out the ending strings in the start tag processing,
1180: # and provide a mechanism to output the stop text external
1181: # to tag processing.
1182: #
1183: {
1184:
1185: my $closing_string = ''; # String required to close <p>
1186:
1187: # Some tags are <p> fragile meaning that <p> inside of them
1188: # does not work within TeX mode. This is managed via the
1189: # counter below:
1190: #
1191:
1192: my $para_disabled = 0;
1193:
1194: sub disable_para {
1195: $para_disabled++;
1196: }
1197: sub enable_para {
1198: $para_disabled--;
1199: }
1200:
1201:
1202: #-- <p> tag (end tag optional)
1203: #optional attribute - align="center|left|right"
1204: sub start_p {
1205: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1206: my $currentstring = '';
1207: if ($target eq 'web' || $target eq 'webgrade') {
1208: $currentstring .= &end_p(); # close off prior para if in progress.
1209: $currentstring .= $token->[4];
1210: if (! ($currentstring =~ /\//)) {
1211: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1212: }
1213: } elsif ($target eq 'tex' && !$para_disabled) {
1214:
1215: $currentstring .= &end_p(); # close off prior para if in progress.
1216: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1217: if ($align eq 'center') {
1218: $currentstring .='\begin{center}\par ';
1219: $closing_string = '\end{center}';
1220: if (&is_inside_of($tagstack, "table")) {
1221: $currentstring = ¢er_correction().$currentstring;
1222: }
1223: } elsif ($align eq 'right') {
1224: $currentstring.="\n".'{\flushright ';
1225: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1226: $closing_string= "}\n";
1227: } elsif ($align eq 'left') {
1228: $currentstring.= "\n".'{\flushleft ';
1229: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1230: $closing_string = "}\n";
1231: } else {
1232: $currentstring.='\par ';
1233: if (&is_inside_of($tagstack, 'table')) {
1234: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1235: } else {
1236: $closing_string = '\strut\\\\\strut ';
1237: }
1238: }
1239:
1240: }
1241: return $currentstring;
1242: }
1243: #
1244: # End paragraph processing just requires that we output the
1245: # closing string that was saved and blank it.
1246: sub end_p {
1247: # Note only 'tex' mode uses disable_para and enable_para
1248: # so we don't need to know the target in the check below:
1249:
1250: if (!$para_disabled) {
1251: my $current_string = $closing_string;
1252: $closing_string = ''; # Not in a para anymore.
1253: return $current_string;
1254: } else {
1255: return '';
1256: }
1257:
1258: }
1259: }
1260: #-- <br> tag (end tag forbidden)
1261: sub start_br {
1262: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1263: my $currentstring = '';
1264: if ($target eq 'web' || $target eq 'webgrade') {
1265: $currentstring .= $token->[4];
1266: } elsif ($target eq 'tex') {
1267: my @tempo=@$tagstack;
1268: my $signal=0;
1269: # Not going to factor this to is_inside_of since that would require
1270: # multiple stack traversals.
1271: #
1272: for (my $i=$#tempo;$i>=0;$i--) {
1273: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1274: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1275: $signal=1;
1276: }
1277: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1278: $signal = 1;
1279: }
1280: }
1281: if ($signal != 1) {
1282: $currentstring .= '\strut \\\\ \strut ';
1283: }
1284:
1285: }
1286: return $currentstring;
1287: }
1288:
1289: sub end_br {
1290: my ($target,$token) = @_;
1291: my $currentstring = '';
1292: if ($target eq 'web' || $target eq 'webgrade') {
1293: $currentstring .= $token->[2];
1294: }
1295: return $currentstring;
1296: }
1297:
1298: #-- <big> tag (end tag required)
1299: sub start_big {
1300: my ($target,$token) = @_;
1301: my $currentstring = '';
1302: if ($target eq 'web' || $target eq 'webgrade') {
1303: $currentstring .= $token->[4];
1304: } elsif ($target eq 'tex') {
1305: $currentstring .= '{\large ';
1306: }
1307: return $currentstring;
1308: }
1309:
1310: sub end_big {
1311: my ($target,$token) = @_;
1312: my $currentstring = '';
1313: if ($target eq 'web' || $target eq 'webgrade') {
1314: $currentstring .= $token->[2];
1315: } elsif ($target eq 'tex') {
1316: $currentstring .= '}';
1317: }
1318: return $currentstring;
1319: }
1320:
1321: #-- <small> tag (end tag required)
1322: sub start_small {
1323: my ($target,$token) = @_;
1324: my $currentstring = '';
1325: if ($target eq 'web' || $target eq 'webgrade') {
1326: $currentstring .= $token->[4];
1327: } elsif ($target eq 'tex') {
1328: $currentstring .= '{\footnotesize ';
1329: }
1330: return $currentstring;
1331: }
1332:
1333: sub end_small {
1334: my ($target,$token) = @_;
1335: my $currentstring = '';
1336: if ($target eq 'web' || $target eq 'webgrade') {
1337: $currentstring .= $token->[2];
1338: } elsif ($target eq 'tex') {
1339: $currentstring .= '}';
1340: }
1341: return $currentstring;
1342: }
1343:
1344: #-- <basefont> tag (end tag forbidden)
1345: sub start_basefont {
1346: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1347: my $currentstring = '';
1348: if ($target eq 'web' || $target eq 'webgrade') {
1349: $currentstring = $token->[4];
1350: } elsif ($target eq 'tex') {
1351: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1352: if (defined $basesize) {
1353: $currentstring = '{\\'.$basesize.' ';
1354: }
1355: }
1356: return $currentstring;
1357: }
1358:
1359: sub end_basefont {
1360: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1361: my $currentstring = '';
1362: if ($target eq 'web' || $target eq 'webgrade') {
1363: $currentstring = $token->[4];
1364: } elsif ($target eq 'tex') {
1365: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1366: if (defined $basesize) {
1367: $currentstring = '}';
1368: }
1369: }
1370: return $currentstring;
1371: }
1372:
1373: #-- <font> tag (end tag required)
1374: sub start_font {
1375: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1376: my $currentstring = '';
1377: if ($target eq 'web' || $target eq 'webgrade') {
1378: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1379: if ($face!~/symbol/i) {
1380: if (($env{'browser.fontenhance'} eq 'on') ||
1381: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1382: }
1383: $currentstring = $token->[4];
1384: } elsif ($target eq 'tex') {
1385: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1386: if (defined $fontsize) {
1387: $currentstring = '{\\'.$fontsize.' ';
1388: }
1389: }
1390: return $currentstring;
1391: }
1392:
1393: sub end_font {
1394: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1395: my $currentstring = '';
1396: if ($target eq 'web' || $target eq 'webgrade') {
1397: $currentstring = $token->[2];
1398: } elsif ($target eq 'tex') {
1399: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1400: if (defined $fontsize) {
1401: $currentstring = '}';
1402: }
1403: }
1404: return $currentstring;
1405: }
1406:
1407: #-- <strike> tag (end tag required)
1408: sub start_strike {
1409: my ($target,$token) = @_;
1410: my $currentstring = '';
1411: if ($target eq 'web' || $target eq 'webgrade') {
1412: $currentstring .= $token->[4];
1413: } elsif ($target eq 'tex') {
1414: &Apache::lonxml::startredirection();
1415: }
1416: return $currentstring;
1417: }
1418:
1419: sub end_strike {
1420: my ($target,$token) = @_;
1421: my $currentstring = '';
1422: if ($target eq 'web' || $target eq 'webgrade') {
1423: $currentstring .= $token->[2];
1424: } elsif ($target eq 'tex') {
1425: $currentstring=&Apache::lonxml::endredirection();
1426: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1427: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1428: $currentstring=~s/(\S)\s*$/$1\}/;
1429: }
1430: return $currentstring;
1431: }
1432:
1433: #-- <s> tag (end tag required)
1434: sub start_s {
1435: my ($target,$token) = @_;
1436: my $currentstring = '';
1437: if ($target eq 'web' || $target eq 'webgrade') {
1438: $currentstring .= $token->[4];
1439: } elsif ($target eq 'tex') {
1440: &Apache::lonxml::startredirection();
1441: }
1442: return $currentstring;
1443: }
1444:
1445: sub end_s {
1446: my ($target,$token) = @_;
1447: my $currentstring = '';
1448: if ($target eq 'web' || $target eq 'webgrade') {
1449: $currentstring .= $token->[2];
1450: } elsif ($target eq 'tex') {
1451: $currentstring=&Apache::lonxml::endredirection();
1452: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1453: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1454: $currentstring=~s/(\S)\s*$/$1\}/;
1455: }
1456: return $currentstring;
1457: }
1458:
1459: #-- <sub> tag (end tag required)
1460: sub start_sub {
1461: my ($target,$token) = @_;
1462: my $currentstring = '';
1463: if ($target eq 'web' || $target eq 'webgrade') {
1464: $currentstring .= $token->[4];
1465: } elsif ($target eq 'tex') {
1466: $currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1467: }
1468: return $currentstring;
1469: }
1470:
1471: sub end_sub {
1472: my ($target,$token) = @_;
1473: my $currentstring = '';
1474: if ($target eq 'web' || $target eq 'webgrade') {
1475: $currentstring .= $token->[2];
1476: } elsif ($target eq 'tex') {
1477: $currentstring .= '}}';
1478: }
1479: return $currentstring;
1480: }
1481:
1482: #-- <sup> tag (end tag required)
1483: sub start_sup {
1484: my ($target,$token) = @_;
1485: my $currentstring = '';
1486: if ($target eq 'web' || $target eq 'webgrade') {
1487: $currentstring .= $token->[4];
1488: } elsif ($target eq 'tex') {
1489: $currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1490: }
1491: return $currentstring;
1492: }
1493:
1494: sub end_sup {
1495: my ($target,$token) = @_;
1496: my $currentstring = '';
1497: if ($target eq 'web' || $target eq 'webgrade') {
1498: $currentstring .= $token->[2];
1499: } elsif ($target eq 'tex') {
1500: $currentstring .= '}}';
1501: }
1502: return $currentstring;
1503: }
1504:
1505: #-- <hr> tag (end tag forbidden)
1506: sub start_hr {
1507: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1508: my $currentstring = &end_p(); # End enclosing para.
1509: if ($target eq 'web' || $target eq 'webgrade') {
1510: $currentstring .= $token->[4];
1511: } elsif ($target eq 'tex') {
1512:
1513: # <hr /> can't be inside of <sup><sub> thank you LaTeX.
1514: #
1515: my $restart_sub = 0;
1516: my $restart_sup = 0;
1517:
1518: # Since <sub> and <sup> are simple tags it's ok to turn off/on
1519: # using the start_ stop_ functions.. those tags only care about
1520: # $target.
1521:
1522: if (&is_inside_of($tagstack, "sub")) {
1523: $restart_sub = 1;
1524: $currentstring .= &end_sub($target, $token, $tagstack,
1525: $parstack, $parser, $safeeval);
1526: }
1527: if (&is_inside_of($tagstack, "sup")) {
1528: $restart_sup = 1;
1529: $currentstring .= &end_sup($target, $token, $tagstack,
1530: $parstack, $parser, $safeeval);
1531: }
1532:
1533: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1534: if (defined $LaTeXwidth) {
1535: if ($LaTeXwidth=~/^%/) {
1536: substr($LaTeXwidth,0,1)='';
1537: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1538: }
1539: } else {
1540: $LaTeXwidth ='0.9\textwidth';
1541: }
1542: my ($pre,$post);
1543: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1544: if (($align eq 'center') || (not defined $align)) {
1545: $pre=''; $post='';
1546: } elsif ($align eq 'left') {
1547: $pre='\rlap{'; $post='} \hfill';
1548: } elsif ($align eq 'right') {
1549: $pre=' \hfill \llap{'; $post='}';
1550: }
1551: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1552: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1553: # Turn stuff back on that we can't be inside of.
1554:
1555: if ($restart_sub) {
1556: $currentstring .= &start_sub($target, $token, $tagstack,
1557: $parstack, $parser, $safeeval);
1558: }
1559: if ($restart_sup) {
1560: $currentstring .= &start_sup($target, $token, $tagstack,
1561: $parstack, $parser, $safeeval);
1562: }
1563: }
1564: return $currentstring;
1565: }
1566:
1567: sub end_hr {
1568: my ($target,$token) = @_;
1569: my $currentstring = '';
1570: if ($target eq 'web' || $target eq 'webgrade') {
1571: $currentstring .= $token->[2];
1572: }
1573: return $currentstring;
1574: }
1575:
1576: #-- <div> tag (end tag required)
1577: {
1578:
1579: # Since div can be nested, the stack below is used
1580: # in 'tex' mode to store the ending strings
1581: # for the div stack.
1582:
1583: my @div_end_stack;
1584:
1585: sub start_div {
1586: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1587: my $currentstring = &end_p(); # Close enclosing para.
1588: if ($target eq 'web' || $target eq 'webgrade') {
1589: $currentstring .= $token->[4];
1590: }
1591: if ($target eq 'tex') {
1592: # 4 possible alignments: left, right, center, and -missing-.
1593: # If inside a table row, we must let the table logic
1594: # do the alignment, however.
1595: #
1596:
1597: my $endstring = '';
1598:
1599: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1600: $safeeval, undef, 1));
1601: if ($align eq 'center') {
1602: $currentstring .= '\begin{center}';
1603: $endstring = '\end{center}';
1604: if (&is_inside_of($tagstack, "table")) {
1605: $currentstring = ¢er_correction().$currentstring;
1606: $endstring .= ¢er_end_correction();
1607: }
1608: }
1609: elsif ($align eq 'right') {
1610: $currentstring .= '\begin{flushright}';
1611: $endstring .= '\end{flushright}';
1612: } elsif ($align eq 'left') {
1613: $currentstring .= '\begin{flushleft}';
1614: $endstring = '\end{flushleft}';
1615: } else {
1616:
1617: }
1618: $currentstring .= "\n"; # For human readability.
1619: $endstring = "\n$endstring\n"; # For human readability
1620: push(@div_end_stack, $endstring);
1621: }
1622: return $currentstring;
1623: }
1624:
1625: sub end_div {
1626: my ($target,$token) = @_;
1627: my $currentstring = '';
1628: if ($target eq 'web' || $target eq 'webgrade') {
1629: $currentstring .= $token->[2];
1630: }
1631: if ($target eq 'tex') {
1632: my $endstring = pop @div_end_stack;
1633: $currentstring .= $endstring;
1634: }
1635: return $currentstring;
1636: }
1637: }
1638:
1639: #-- <a> tag (end tag required)
1640: sub start_a {
1641: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1642: my $currentstring = '';
1643: if ($target eq 'web' || $target eq 'webgrade') {
1644: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1645: undef,1);
1646: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1647: }
1648: return $currentstring;
1649: }
1650:
1651: sub end_a {
1652: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1653: my $currentstring = '';
1654: if ($target eq 'web' || $target eq 'webgrade') {
1655: $currentstring .= $token->[2];
1656: }
1657: if ($target eq 'tex') {
1658: my $href =
1659: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1660: my $name =
1661: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1662: my $uriprint =
1663: &Apache::lonxml::get_param('uriprint',$parstack,$safeeval,undef,1);
1664: my $anchorprint =
1665: &Apache::lonxml::get_param('anchorprint',$parstack,$safeeval,undef,1);
1666: if (($href =~ /\S/) && ($uriprint=~/^on|uriprint|yes|1$/i)) {
1667: $href =~ s/([^\\])%/$1\\\%/g;
1668: # Substitute special symbols... and allow line breaks at each /
1669: #
1670: $href = &Apache::lonxml::latex_special_symbols($href);
1671: $href =~ s/\//\/\\-/g; # Map / to /\- to allow hyphenation.
1672: $currentstring .= ' ({\tt URI:'.$href.'})';
1673: } elsif (($name =~ /\S/) && ($anchorprint=~/^on|anchorprint|yes|1$/i)) {
1674: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1675: } else {
1676: $currentstring.='';
1677: }
1678: }
1679: return $currentstring;
1680: }
1681:
1682: #-- <li> tag (end tag optional)
1683: sub start_li {
1684: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1685: my $currentstring = '';
1686: if ($target eq 'web' || $target eq 'webgrade') {
1687: $currentstring = $token->[4];
1688: } elsif ($target eq 'tex') {
1689: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1690: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1691: #FIXME need to support types i and I
1692: if ($type=~/disc/) {
1693: $currentstring .= ' \item[$\bullet$] ';
1694: } elsif ($type=~/circle/) {
1695: $currentstring .= ' \item[$\circ$] ';
1696: } elsif ($type=~/square/) {
1697: $currentstring .= ' \item[$\diamond$] ';
1698: } elsif ($type eq '1') {
1699: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1700: } elsif ($type eq 'A') {
1701: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1702: } elsif ($type eq 'a') {
1703: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1704: } elsif ($value ne '') {
1705: $currentstring .= ' \item['.$value.'] ';
1706: } else {
1707: $currentstring .= ' \item ';
1708: }
1709: $Apache::londefdef::list_index++;
1710: }
1711: return $currentstring;
1712: }
1713:
1714: sub end_li {
1715: my ($target,$token) = @_;
1716: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1717: if ($target eq 'web' || $target eq 'webgrade') {
1718: $currentstring .= $token->[2];
1719: }
1720: return $currentstring;
1721: }
1722:
1723: #-- <u> tag (end tag required)
1724: sub start_u {
1725: my ($target,$token) = @_;
1726: my $currentstring = '';
1727: if ($target eq 'web' || $target eq 'webgrade') {
1728: $currentstring .= $token->[4];
1729: } elsif ($target eq 'tex') {
1730: &Apache::lonxml::startredirection();
1731: }
1732: return $currentstring;
1733: }
1734:
1735: sub end_u {
1736: my ($target,$token) = @_;
1737: my $currentstring = '';
1738: if ($target eq 'web' || $target eq 'webgrade') {
1739: $currentstring .= $token->[2];
1740: } elsif ($target eq 'tex') {
1741: $currentstring=&Apache::lonxml::endredirection();
1742: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1743: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1744: $currentstring=~s/(\S)\s*$/$1\}/;
1745: }
1746: return $currentstring;
1747: }
1748:
1749: #-- <ul> tag (end tag required)
1750: sub start_ul {
1751: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1752: my $currentstring = &end_p(); # Close off enclosing list.
1753: if ($target eq 'web' || $target eq 'webgrade') {
1754: $currentstring .= $token->[4];
1755: } elsif ($target eq 'tex') {
1756: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1757: $Apache::londefdef::list_index=0;
1758: if ($TeXtype eq 'disc') {
1759: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1760: '\renewcommand{\labelitemii}{$\bullet$}'.
1761: '\renewcommand{\labelitemiii}{$\bullet$}'.
1762: '\renewcommand{\labelitemiv}{$\bullet$}';
1763: } elsif ($TeXtype eq 'circle') {
1764: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1765: '\renewcommand{\labelitemii}{$\circ$}'.
1766: '\renewcommand{\labelitemiii}{$\circ$}'.
1767: '\renewcommand{\labelitemiv}{$\circ$}';
1768: } elsif ($TeXtype eq 'square') {
1769: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1770: '\renewcommand{\labelitemii}{$\diamond$}'.
1771: '\renewcommand{\labelitemiii}{$\diamond$}'.
1772: '\renewcommand{\labelitemiv}{$\diamond$}';
1773: }
1774: $currentstring .= '\strut \begin{itemize}';
1775: }
1776: return $currentstring;
1777: }
1778:
1779: sub end_ul {
1780: my ($target,$token) = @_;
1781: my $currentstring = '';
1782: if ($target eq 'web' || $target eq 'webgrade') {
1783: $currentstring = $token->[2];
1784: } elsif ($target eq 'tex') {
1785: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1786: '\renewcommand{\labelitemii}{$\bullet$}'.
1787: '\renewcommand{\labelitemiii}{$\bullet$}'.
1788: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1789: }
1790: return $currentstring;
1791: }
1792:
1793: #-- <menu> tag (end tag required)
1794: sub start_menu {
1795: my ($target,$token) = @_;
1796: my $currentstring = '';
1797: if ($target eq 'web' || $target eq 'webgrade') {
1798: $currentstring = $token->[4];
1799: } elsif ($target eq 'tex') {
1800: $currentstring = " \\begin{itemize} ";
1801: }
1802: return $currentstring;
1803: }
1804:
1805: sub end_menu {
1806: my ($target,$token) = @_;
1807: my $currentstring = '';
1808: if ($target eq 'web' || $target eq 'webgrade') {
1809: $currentstring = $token->[2];
1810: } elsif ($target eq 'tex') {
1811: $currentstring = " \\end{itemize}";
1812: }
1813: return $currentstring;
1814: }
1815:
1816: #-- <dir> tag (end tag required)
1817: sub start_dir {
1818: my ($target,$token) = @_;
1819: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1820: if ($target eq 'web' || $target eq 'webgrade') {
1821: $currentstring .= $token->[4];
1822: } elsif ($target eq 'tex') {
1823: $currentstring .= " \\begin{itemize} ";
1824: }
1825: return $currentstring;
1826: }
1827:
1828: sub end_dir {
1829: my ($target,$token) = @_;
1830: my $currentstring = '';
1831: if ($target eq 'web' || $target eq 'webgrade') {
1832: $currentstring = $token->[2];
1833: } elsif ($target eq 'tex') {
1834: $currentstring = " \\end{itemize}";
1835: }
1836: return $currentstring;
1837: }
1838:
1839: #-- <ol> tag (end tag required)
1840: sub start_ol {
1841: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1842: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1843: if ($target eq 'web' || $target eq 'webgrade') {
1844: $currentstring .= $token->[4];
1845: } elsif ($target eq 'tex') {
1846: $Apache::londefdef::list_index=0;
1847: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1848: if ($type eq '1') {
1849: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1850: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1851: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1852: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1853: } elsif ($type eq 'A') {
1854: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1855: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1856: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1857: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1858: } elsif ($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 'i') {
1864: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1865: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1866: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1867: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1868: } elsif ($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: }
1874: $currentstring .= '\strut \begin{enumerate}';
1875: }
1876: return $currentstring;
1877: }
1878:
1879: sub end_ol {
1880: my ($target,$token) = @_;
1881: my $currentstring = '';
1882: if ($target eq 'web' || $target eq 'webgrade') {
1883: $currentstring = $token->[2];
1884: } elsif ($target eq 'tex') {
1885: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1886: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1887: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1888: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1889: }
1890: return $currentstring;
1891: }
1892:
1893: #-- <dl> tag (end tag required)
1894: sub start_dl {
1895: my ($target,$token) = @_;
1896: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1897: if ($target eq 'web' || $target eq 'webgrade') {
1898: $currentstring .= $token->[4];
1899: } elsif ($target eq 'tex') {
1900: $currentstring .= '\begin{description}';
1901: $Apache::londefdef::DL++;
1902: push(@Apache::londefdef::description,[]);
1903: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1904: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1905: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1906: }
1907: return $currentstring;
1908: }
1909:
1910: sub end_dl {
1911: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1912: my $currentstring = '';
1913: if ($target eq 'web' || $target eq 'webgrade') {
1914: $currentstring = $token->[2];
1915: } elsif ($target eq 'tex') {
1916: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1917: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1918: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1919: $currentstring.=' '.$element.' ';
1920: }
1921: pop(@Apache::londefdef::description);
1922: $currentstring.='\end{description}';
1923: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1924: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1925: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1926: $Apache::londefdef::DL--;
1927: }
1928: return $currentstring;
1929: }
1930:
1931: #-- <dt> tag (end tag optional)
1932: sub start_dt {
1933: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1934: my $currentstring='';
1935: if ($target eq 'web' || $target eq 'webgrade') {
1936: $currentstring = $token->[4];
1937: } elsif ($target eq 'tex') {
1938: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1939: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1940: &Apache::lonxml::startredirection();
1941: $Apache::londefdef::DT[-1]++;
1942: $Apache::londefdef::seenDT[-1]=1;
1943: }
1944: return $currentstring;
1945: }
1946:
1947: sub end_dt {
1948: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1949: my $currentstring = '';
1950: if ($target eq 'web' || $target eq 'webgrade') {
1951: $currentstring = $token->[2];
1952: } elsif ($target eq 'tex') {
1953: if ($Apache::londefdef::DT[-1]) {
1954: my $data=&item_cleanup();
1955: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1956: $Apache::londefdef::DT[-1]--;
1957: }
1958: }
1959: return $currentstring;
1960: }
1961:
1962: sub item_cleanup {
1963: my $item=&Apache::lonxml::endredirection();
1964: $item=~s/\\begin{center}//g;
1965: $item=~s/\\end{center}//g;
1966: return $item;
1967: }
1968:
1969: #-- <dd> tag (end tag optional)
1970: sub start_dd {
1971: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1972: my $currentstring = '';
1973: if ($target eq 'web' || $target eq 'webgrade') {
1974: $currentstring = $token->[4];
1975: } elsif ($target eq 'tex') {
1976: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1977: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1978: if (!$Apache::londefdef::seenDT[-1]) {
1979: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1980: }
1981: push(@{$Apache::londefdef::description[-1]},'');
1982: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1983: $Apache::londefdef::DD[-1]++;
1984: &Apache::lonxml::startredirection();
1985: }
1986: return $currentstring;
1987: }
1988:
1989: sub end_dd {
1990: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1991: my $currentstring = '';
1992: if ($target eq 'web' || $target eq 'webgrade') {
1993: $currentstring = $token->[2];
1994: } elsif ($target eq 'tex') {
1995: $Apache::londefdef::description[-1]->[-1].=
1996: &Apache::lonxml::endredirection().' \vskip 0mm ';
1997: $Apache::londefdef::DD[-1]--;
1998: }
1999: return $currentstring;
2000: }
2001:
2002: #-- <table> tag (end tag required)
2003: # <table> also ends any prior <p> that is not closed.
2004: # but, unless I allow <p>'s to nest, that's the
2005: # only way I could think of to allow <p> in
2006: # <tr> <th> bodies
2007: #
2008: #list of supported attributes: border,width,TeXwidth
2009: sub start_table {
2010: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2011: my $textwidth = '';
2012: my $currentstring = &end_p();
2013: if ($target eq 'web' || $target eq 'webgrade') {
2014: $currentstring .= $token->[4];
2015: } elsif ($target eq 'tex') {
2016: push(@Apache::londefdef::table, {});
2017: $Apache::londefdef::table[-1]{'row_number'} = -1;
2018: #maximum table's width (default coincides with text line length)
2019: if ($#Apache::londefdef::table==0) {
2020: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
2021: $textwidth=~/(\d+\.?\d*)/;
2022: $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
2023: } else {
2024: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
2025: #the maximum width of nested table is determined by LATeX width of parent cell
2026: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
2027: } else {
2028: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
2029: $textwidth=$Apache::londefdef::table[-2]{'width'};
2030: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
2031: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
2032: }
2033: }
2034: }
2035:
2036: # width either comes forced from the TeXwidth or the width parameters.
2037: # in either case it can be a percentage or absolute width.
2038: # in the width case we ignore absolute width
2039: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2040: if (!defined($TeXwidth)) {
2041: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
2042: $safeeval,undef,1);
2043: if ($htmlwidth =~ /%/) {
2044: $TeXwidth = $htmlwidth;
2045: } else {
2046: $TeXwidth = $textwidth;
2047: }
2048: }
2049: # if the width is specified as a % it is converted to an absolute width.
2050: # otherwise.. just plugged right in the hash
2051:
2052: if ($TeXwidth=~/%/) {
2053: $TeXwidth=~/(\d+)/;
2054: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
2055: } else {
2056: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
2057: }
2058: # In the end, however the table width cannot be wider than $textwidth...
2059:
2060: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
2061: $Apache::londefdef::table[-1]{'width'} = $textwidth;
2062: }
2063: #table's border
2064: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2065: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2066: unless (defined $border) { $border = 0; }
2067: if ($border) {
2068: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
2069: $Apache::londefdef::table[-1]{'vinc'} = '&';
2070: $Apache::londefdef::table[-1]{'vvinc'} = '|';
2071: } else {
2072: $Apache::londefdef::table[-1]{'hinc'} = '';
2073: $Apache::londefdef::table[-1]{'vinc'} = '&';
2074: $Apache::londefdef::table[-1]{'vvinc'} = '';
2075: }
2076: if ($#Apache::londefdef::table==0) {
2077: # Note that \newline seems to destroy the alignment envs.
2078: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2079: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2080: }
2081: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2082: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2083: $Apache::londefdef::table[-1]{'objectlen'}=[];
2084: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2085: $Apache::londefdef::table[-1]{'maxlen'}=[];
2086: $Apache::londefdef::table[-1]{'minlen'}=[];
2087: $Apache::londefdef::table[-1]{'content'}=[];
2088: $Apache::londefdef::table[-1]{'align'}=[];
2089: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2090:
2091:
2092: }
2093: return $currentstring;
2094: }
2095:
2096: sub end_table {
2097: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2098: my $currentstring = '';
2099: if ($target eq 'web' || $target eq 'webgrade') {
2100: $currentstring = $token->[2];
2101: } elsif ($target eq 'tex') {
2102: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2103: my $inmemory = '';
2104: my $output = '';
2105: my $WARNING='';
2106: #width of columns from TeXwidth attributes
2107:
2108: # Protect against unbalanced </table> tag.
2109:
2110: if (scalar(@Apache::londefdef::table) > 0) {
2111:
2112: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2113: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2114: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2115: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2116: }
2117: }
2118: }
2119: #free space and number of empty columns
2120: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2121: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2122: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2123: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2124: $empty_columns++;
2125: } else {
2126: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2127: }
2128: }
2129:
2130: #boundaries for contents columns
2131: my @min_len=();#columns can not be narrower
2132: my @max_len=();#maximum length of column
2133: my $avg_max;
2134: my $avg_min;
2135: my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
2136: for (my $jn=0;$jn<=$counter_cols; $jn++) {
2137: my ($localmin,$localmax)=(0,0);
2138: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2139: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2140: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2141: }
2142: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2143: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2144: }
2145: }
2146: push @min_len, $localmin;
2147: push @max_len, $localmax;
2148: $avg_max = $localmax + $avg_max;
2149: $avg_min = $localmin + $avg_min;
2150: }
2151: # Does not really matter what the average max/min are if there are no cols.
2152: # and this prevents div 0 in that case.
2153:
2154: if ($counter_cols != 0) {
2155: $avg_max = $avg_max/$counter_cols;
2156: $avg_min = $avg_min/$counter_cols;
2157: }
2158:
2159:
2160: # I don't think the below is needed.. but just in case:
2161:
2162: if ($avg_min > $avg_max) {
2163: my $temp = $avg_min;
2164: $avg_min = $avg_max;
2165: $avg_max = $temp;
2166: }
2167:
2168:
2169: for (my $jn=0;$jn<=$counter_cols;$jn++) {
2170: my $localmin=0,;
2171: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2172: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2173: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2174: }
2175: }
2176: if ($max_len[$jn]<$localmin) {
2177: $max_len[$jn]=$localmin;
2178: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2179: }#object size is bigger
2180: if ($min_len[$jn]<$localmin) {
2181: $min_len[$jn]=$localmin;
2182: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2183: }#object size is bigger
2184: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2185: $min_len[$jn]=0;
2186: $max_len[$jn]=0;
2187: }
2188: # Spans seem to be really bothered by max/min = 0. So if we have one
2189: # make it an average joe max/min.
2190:
2191: if ($max_len[$jn] == 0) {
2192: $max_len[$jn] = $avg_max;
2193: }
2194: if ($min_len[$jn] == 0) {
2195: $min_len[$jn] = $avg_min;
2196: }
2197:
2198: }
2199: #final adjustment of column width
2200: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2201: my @adjust=();
2202: #step 1. adjustment by maximum value
2203: my $space_needed=0;
2204: for (my $jn=0;$jn<=$#max_len;$jn++) {
2205: $space_needed=$space_needed+$max_len[$jn];
2206: }
2207: if ($space_needed<=$available_space) {
2208:
2209: for (my $jn=0;$jn<=$#max_len;$jn++) {
2210: if ($fwidth[$jn]==0) {
2211: $fwidth[$jn]=$max_len[$jn];
2212: }
2213: }
2214: } else {
2215: #step 2. adjustment by minimum value (estimation)
2216: $space_needed=0;
2217: for (my $jn=0;$jn<=$#min_len;$jn++) {
2218: $space_needed+=$min_len[$jn];
2219: }
2220: if ($space_needed>$available_space) {
2221: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2222: for (my $jn=0;$jn<=$#max_len;$jn++) {
2223: if ($fwidth[$jn]==0) {
2224: $fwidth[$jn]=$min_len[$jn];
2225: }
2226: }
2227: #check if we have objects which can be scaled
2228: my $how_many_to_scale=0;
2229: my @to_scale=();
2230: for (my $jn=0;$jn<=$#max_len;$jn++) {
2231: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2232: $how_many_to_scale++;
2233: push @to_scale, $jn;
2234: }
2235: }
2236: if ($how_many_to_scale>0) {
2237: my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
2238: foreach my $jn (@to_scale) {
2239: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2240: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2241: if ($1 ne '') {
2242: my $current_length=&recalc($1);
2243: $current_length=~/(\d+\.?\d*)/;
2244: $current_length=$current_length-$space_to_adjust;
2245: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2246: }
2247: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2248: if ($1 ne '') {
2249: my $current_length=$1;
2250: $current_length=$current_length-$space_to_adjust;
2251: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2252: }
2253: }
2254: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2255: }
2256: }
2257: } else {
2258: #step 3. adjustment over minimal + corrections
2259: my $enlarge_coef=$available_space/$space_needed;
2260: my $acsessive=0;
2261: for (my $jn=0;$jn<=$#min_len;$jn++) {
2262: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2263: if ($adjust[$jn]>$max_len[$jn]) {
2264: $fwidth[$jn]=$max_len[$jn];
2265: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2266: $adjust[$jn]=0;
2267:
2268: }
2269: }
2270: if ($acsessive>0) {
2271: #we have an excess of space and can redistribute it
2272: my $notempty_columns=0;
2273: for (my $jn=0;$jn<=$#min_len;$jn++) {
2274: if ($adjust[$jn]!=0) {
2275: $notempty_columns++;
2276: }
2277: }
2278: my $per_column=$acsessive/$notempty_columns;
2279: for (my $jn=0;$jn<=$#min_len;$jn++) {
2280: if ($adjust[$jn]!=0) {
2281: $adjust[$jn]+=$per_column;
2282: $fwidth[$jn]=$adjust[$jn];
2283: }
2284: }
2285: } else {
2286: for (my $jn=0;$jn<=$#min_len;$jn++) {
2287: $fwidth[$jn]=$adjust[$jn];
2288: }
2289: }
2290: }
2291: }
2292: # use all available width or specified width as if not specified,
2293: # the specified width gets defaulted to the available width.
2294:
2295: my $current=0;
2296: for (my $i=0;$i<=$#fwidth;$i++) {
2297: $current+=$fwidth[$i];
2298: }
2299: if ($current == 0) {
2300: $current = $Apache::londefdef::table[-1]{'width'};
2301: }
2302: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2303: for (my $i=0;$i<=$#fwidth;$i++) {
2304: $fwidth[$i]*=$coef;
2305: }
2306: #removing of empty columns if allowed
2307: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2308: if ($permission eq 'yes') {
2309: my @cleaned_table=();
2310: my @cleaned_header=();
2311: my $colind=0;
2312: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2313: if ($fwidth[$jn]!=0) {
2314: #we need to copy column
2315: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2316: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2317: $cleaned_header[$colind]=$fwidth[$jn];
2318: }
2319: $colind++;
2320: }
2321: }
2322: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2323: @fwidth=@cleaned_header;
2324: }
2325:
2326:
2327: #construct header of the table
2328: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2329: for (my $in=0;$in<=$#fwidth;$in++) {
2330: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2331: }
2332: $header_of_table .= '}';
2333:
2334: #fill the table
2335: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2336: my $have_rowspan = 0;
2337: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2338:
2339: #-----------------------------------------------------------
2340: # I think this order of doing things will ensure that
2341: # single rowspan, columspan and combined row/colspans will
2342: # work correctly. LaTeX is delicate here.
2343: # RF.
2344:
2345: # Start a rowspan if necessary:
2346:
2347: my $primary_col_width = $fwidth[$jn]; # Width of primary column.
2348: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2349: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2350: #
2351: # Do the appropriate magic if this has a colspan
2352: #
2353:
2354: my $border_char = "";
2355: if ($border) {
2356: $border_char = "|";
2357: }
2358: my $spanwidth = 0;
2359: if ($colspan > 1) {
2360: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2361: $spanwidth += $fwidth[$spancol];
2362: }
2363: $output .= '\multicolumn{'.
2364: $colspan
2365: ."}";
2366: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2367: $output .= '{'.$border_char.'c'.$border_char.'}{';
2368: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2369: $output .= '{'.$border_char.'r'.$border_char.'}{';
2370: }
2371: else {
2372: $output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
2373: }
2374:
2375: } else {
2376: $spanwidth = $primary_col_width; # If no span width will be just colwidth
2377: }
2378:
2379: # Rowspan... if colspan is 1, and there's an alignment we'll need
2380: # to kick in a multicolumn in order to get the alignment spec.
2381: # this must precede the multirow or LaTex gets quite upset.
2382: # Naturally if colspan > 1 we've already done that above ^
2383: #
2384: my $multirow_aligned = 0;
2385: if ($rowspan > 1) {
2386: if ($colspan == 1) {
2387: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2388: $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
2389: $multirow_aligned = 1;
2390: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2391: $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
2392: $multirow_aligned = 1;
2393: }
2394: }
2395: $have_rowspan++;
2396: if ($multirow_aligned) {
2397: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2398: } else {
2399: $output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
2400: }
2401:
2402: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2403: s{^\s*\\par\s*}{};
2404: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2405: s{\s*\\vskip\s*0pt\s*$}{};
2406:
2407: #
2408: # If we did not throw in a multicolumn to align, then add
2409: # an extra {
2410: # so we close correctly without having to keep additional state
2411: # around
2412: #
2413: if (!$multirow_aligned) {
2414: $output .= '{';
2415: }
2416: }
2417: if (($rowspan eq '^') || ($rowspan eq '_')) {
2418: $have_rowspan++;
2419: }
2420: #--------------------------------------------------------------
2421:
2422:
2423: # For right and center alignment of single cells.
2424: # we are going to use a multicolumn with a span of 1 to specify alignment.
2425: #
2426: if ($colspan == 1 && $rowspan == 1) {
2427: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2428: $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
2429: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2430: $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
2431: }
2432: }
2433:
2434: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2435:
2436: if (($colspan == 1 && $rowspan == 1) &&
2437: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2438: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2439: $output .= '}';
2440: }
2441:
2442: # Close off any open multirow:
2443:
2444: if ($rowspan > 1) {
2445: $output .= '}}';
2446: }
2447: # Close off the colspan...
2448: #
2449: if ($colspan > 1) {
2450: $output .= '}';
2451: $jn += $colspan-1; # Adjust for number of rows really left.
2452: }
2453: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2454: }
2455: # If have_rowspan > 0, and borders are on, then
2456: # we need to do more than put an \hline at the bottom of row.
2457: # we need to do the appropriate \cline to ensure that
2458: # the spanned rows don't have \hlines through them.
2459:
2460: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2461: $output .= ' \\\\ ';
2462: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2463: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2464: if ($rowspan ne "^") {
2465: if (($rowspan <= 1) || ($rowspan eq '_')) {
2466: my $column = $jn+1;
2467: $output .= '\cline{'.$column.'-'.$column.'} ';
2468: }
2469: }
2470: }
2471:
2472: } else {
2473: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2474: }
2475: }
2476: # Note that \newline destroys alignment env's produced by e.g. <div>
2477: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2478: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2479: if ($#Apache::londefdef::table > 0) {
2480: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2481: # Figure out max/and min width by summing us and then
2482: # apply that to the current column of the table we nest in
2483: # if it's larger than the current width or the current width
2484: # is undefined.
2485: #
2486: my $min_nested_width = 0;
2487: my $max_nested_width = 0;
2488: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2489: $min_nested_width += $min_len[$col];
2490: $max_nested_width += $max_len[$col];
2491:
2492: }
2493: # Fudge in an extra 5 mm for borders etc:
2494:
2495: $min_nested_width += 5;
2496: $max_nested_width += 5;
2497:
2498: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2499: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2500: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2501: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2502: }
2503: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2504: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2505: }
2506:
2507: pop @Apache::londefdef::table;
2508: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2509: } else {
2510: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2511: pop @Apache::londefdef::table;
2512: undef @Apache::londefdef::table;
2513: }
2514: }
2515: }
2516: return $currentstring;
2517: }
2518:
2519: #-- <tr> tag (end tag optional)
2520: sub start_tr {
2521: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2522: my $currentstring = '';
2523: if ($target eq 'web' || $target eq 'webgrade') {
2524: $currentstring = $token->[4];
2525: } elsif ($target eq 'tex') {
2526: $Apache::londefdef::table[-1]{'row_number'}++;
2527: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2528: if ($alignchar ne '') {
2529: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2530: } else {
2531: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2532: }
2533: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2534: #
2535: # Need to save the number of table columns to preserve the max # columns.
2536: #
2537: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2538: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2539: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2540: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2541: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2542: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2543: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2544: }
2545: return $currentstring;
2546: }
2547:
2548: sub end_tr {
2549: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2550: my $currentstring = &end_p(); # Close any pending <p> in the row.
2551: if ($target eq 'web' || $target eq 'webgrade') {
2552: $currentstring .= $token->[2];
2553: } elsif ($target eq 'tex') {
2554: if ($Apache::londefdef::TD_redirection) {
2555: &end_td_tex($parstack,$parser,$safeeval);
2556: }
2557: # Counter columns must be the maximum number of columns seen
2558: # in the table so far so:
2559: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2560: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2561: }
2562:
2563:
2564:
2565: }
2566: return $currentstring;
2567: }
2568:
2569: #-- <td> tag (end tag optional)
2570: sub start_td {
2571: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2572: my $currentstring = '';
2573: if ($target eq 'web' || $target eq 'webgrade') {
2574: $currentstring = $token->[4];
2575: } elsif ($target eq 'tex') {
2576: $Apache::londefdef::TD_redirection = 1;
2577: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2578: }
2579: return $currentstring;
2580: }
2581:
2582: sub tag_check {
2583: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2584: my @ar=@$parstack;
2585: for (my $i=$#ar-1;$i>=0;$i--) {
2586: if (lc($$tagstack[$i]) eq $good_tag) {
2587: &start_td_tex($parstack,$parser,$safeeval);
2588: last;
2589: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2590: splice @ar, $i+1;
2591: &end_td_tex(\@ar,$parser,$safeeval);
2592: &start_td_tex($parstack,$parser,$safeeval);
2593: last;
2594: }
2595: }
2596: return '';
2597: }
2598:
2599: sub start_td_tex {
2600: my ($parstack,$parser,$safeeval) = @_;
2601: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2602: if ($alignchar eq '') {
2603: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2604: }
2605: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2606: $Apache::londefdef::table[-1]{'counter_columns'}++;
2607: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2608: if (defined $TeXwidth) {
2609: my $current_length=&recalc($TeXwidth);
2610: $current_length=~/(\d+\.?\d*)/;
2611: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2612: }
2613: &Apache::lonxml::startredirection();
2614: return '';
2615: }
2616:
2617: sub end_td_tex {
2618: my ($parstack,$parser,$safeeval) = @_;
2619: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2620: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2621: my $data = &Apache::lonxml::endredirection();
2622:
2623: # The rowspan array of the table indicates which cells are part of a span.
2624: # n indicates the start of a span set of n rows.
2625: # ^ indicates a cell that continues a span set.
2626: # _ indicates the cell is at the bottom of a span set.
2627: # If this and subsequent cells are part of a rowspan, we must
2628: # push along the row until we find one that is not.
2629:
2630: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2631: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2632: # Part of a span.
2633: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2634: $current_column++;
2635: }
2636: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2637:
2638:
2639: # Get the column and row spans.
2640: # Colspan can be done via \multicolumn if I can figure out the data structs.
2641:
2642: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2643: if (!$colspan) {
2644: $colspan = 1;
2645: }
2646:
2647: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2648: if (!$rowspan) {
2649: $rowspan = 1;
2650: }
2651:
2652:
2653:
2654: for (my $c = 0; $c < $colspan; $c++) {
2655: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2656: for (my $i = 1; $i < $rowspan; $i++) {
2657: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2658: if ($i == ($rowspan-1)) {
2659: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2660: }
2661: }
2662: }
2663:
2664: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2665: if (defined $TeXwidth) {
2666: for (my $c = 0; $c < $colspan; $c++) {
2667: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2668: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2669: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2670: }
2671: } else {
2672: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2673: my $garbage_data=$data;
2674: my $fwidth=0;
2675: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2676: my $current_length=&recalc($1);
2677: $current_length=~/(\d+\.?\d*)/;
2678: if ($fwidth<$1) {$fwidth=$1;}
2679: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2680: }
2681: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2682: my $current_length=$1;
2683: if ($fwidth<$current_length) {$fwidth=$current_length;}
2684: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2685: }
2686: for (my $c = 0; $c < $colspan; $c++) {
2687: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2688: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2689: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2690: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2691: }
2692: } 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)*/) {
2693: my $garbage_data=$data;
2694: my $fwidth=0;
2695: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2696: my $current_length=&recalc($1);
2697: $current_length=~/(\d+\.?\d*)/;
2698: if ($fwidth<$1) {$fwidth=$1;}
2699: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2700: }
2701: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2702: my $current_length=&recalc($1);
2703: $current_length=~/(\d+\.?\d*)/;
2704: if ($fwidth<$1) {$fwidth=$1;}
2705: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2706: }
2707: for (my $c = 0; $c < $colspan; $c++) {
2708: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2709: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2710: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2711: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2712: }
2713: $data=~s/\\\\\s*$//;
2714: } else {
2715: $data=~s/^\s+(\S.*)/$1/;
2716: $data=~s/(.*\S)\s+$/$1/;
2717: $data=~s/(\s)+/$1/;
2718: my ($current_length,$min_length)=(0,0);
2719: if ($data=~/\\vskip/) {
2720: my $newdata=$data;
2721: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2722: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2723: foreach my $elementdata (@newdata) {
2724: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2725: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2726: my @words=split(/ /,$elementdata);
2727: foreach my $word (@words) {
2728: my $lengthword=2.5*&LATEX_length($word);
2729: if ($min_length<$lengthword) {$min_length=$lengthword;}
2730: }
2731: }
2732: } else {
2733: $current_length=2.5*&LATEX_length($data);
2734: my @words=split(/ /,$data);
2735: foreach my $word (@words) {
2736: my $lengthword=2*&LATEX_length($word);
2737: if ($min_length<$lengthword) {$min_length=$lengthword;}
2738: }
2739: }
2740: for (my $c = 0; $c < $colspan; $c++) {
2741: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2742: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2743: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2744: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2745: }
2746: }
2747: }
2748: # Substitute all of the tables nested in this cell in their appropriate places.
2749:
2750:
2751: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2752: for (my $in=0; $in<=$nested_count; $in++) {
2753: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2754: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2755: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2756: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2757:
2758: }
2759: # Should be be killing off the 'include' elements as they're used up?
2760:
2761: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2762:
2763:
2764:
2765:
2766: # the colspan array will indicate how many columns will be spanned by this
2767: # cell..this requires that counter_columns also be adjusted accordingly
2768: # so that the next bunch of text goes in the right cell. Note that since
2769: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2770: #
2771:
2772: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2773: for (my $i = 0; $i < ($colspan -1); $i++) {
2774: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2775: }
2776: for (my $r = 0; $r < $rowspan; $r++) {
2777: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2778: # Put empty text in spanned cols.
2779:
2780: }
2781:
2782:
2783:
2784: return '';
2785: }
2786:
2787: sub end_td {
2788: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2789: my $currentstring = '';
2790: if ($target eq 'web' || $target eq 'webgrade') {
2791: $currentstring = $token->[2];
2792: } elsif ($target eq 'tex') {
2793: $Apache::londefdef::TD_redirection =0;
2794: &end_td_tex($parstack,$parser,$safeeval);
2795: }
2796: return $currentstring;
2797: }
2798:
2799: #-- <th> tag (end tag optional)
2800: sub start_th {
2801: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2802: my $currentstring = '';
2803: if ($target eq 'web' || $target eq 'webgrade') {
2804: $currentstring = $token->[4];
2805: } elsif ($target eq 'tex') {
2806: $Apache::londefdef::TD_redirection = 1;
2807: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2808: }
2809: return $currentstring;
2810: }
2811:
2812: sub tagg_check {
2813: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2814: my @ar=@$parstack;
2815: for (my $i=$#ar-1;$i>=0;$i--) {
2816: if (lc($$tagstack[$i]) eq $good_tag) {
2817: &start_th_tex($parstack,$parser,$safeeval);
2818: last;
2819: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2820: splice @ar, $i+1;
2821: &end_th_tex(\@ar,$parser,$safeeval);
2822: &start_th_tex($parstack,$parser,$safeeval);
2823: last;
2824: }
2825: }
2826: return '';
2827: }
2828:
2829: sub start_th_tex {
2830: my ($parstack,$parser,$safeeval) = @_;
2831: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2832: if ($alignchar eq '') {
2833: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2834: }
2835: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2836: $Apache::londefdef::table[-1]{'counter_columns'}++;
2837: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2838: if (defined $TeXwidth) {
2839: my $current_length=&recalc($TeXwidth);
2840: $current_length=~/(\d+\.?\d*)/;
2841: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2842: }
2843: &Apache::lonxml::startredirection();
2844: return '';
2845: }
2846:
2847: sub end_th_tex {
2848: my ($parstack,$parser,$safeeval) = @_;
2849: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2850: my $data=&Apache::lonxml::endredirection();
2851: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2852: if (defined $TeXwidth) {
2853: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2854: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2855: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2856: } else {
2857: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2858: my $garbage_data=$data;
2859: my $fwidth=0;
2860: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2861: my $current_length=&recalc($1);
2862: $current_length=~/(\d+\.?\d*)/;
2863: if ($fwidth<$1) {$fwidth=$1;}
2864: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2865: }
2866: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2867: my $current_length=$1;
2868: if ($fwidth<$current_length) {$fwidth=$current_length;}
2869: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2870: }
2871: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2872: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2873: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2874: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2875: } else {
2876: $data=~s/^\s+(\S.*)/$1/;
2877: $data=~s/(.*\S)\s+$/$1/;
2878: $data=~s/(\s)+/$1/;
2879: my ($current_length,$min_length)=(0,0);
2880: if ($data=~/\\vskip/) {
2881: my $newdata=$data;
2882: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2883: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2884: foreach my $elementdata (@newdata) {
2885: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2886: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2887: my @words=split(/ /,$elementdata);
2888: foreach my $word (@words) {
2889: my $lengthword=2.5*&LATEX_length($word);
2890: if ($min_length<$lengthword) {$min_length=$lengthword;}
2891: }
2892: }
2893: } else {
2894: $current_length=2.5*&LATEX_length($data);
2895: my @words=split(/ /,$data);
2896: foreach my $word (@words) {
2897: my $lengthword=2*&LATEX_length($word);
2898: if ($min_length<$lengthword) {$min_length=$lengthword;}
2899: }
2900: }
2901: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2902: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2903: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2904: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2905: }
2906: }
2907: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2908: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2909: }
2910: #make data bold
2911: $data='\textbf{'.$data.'}';
2912: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2913: return'';
2914: }
2915:
2916: sub end_th {
2917: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2918: my $currentstring = &end_p(); # Close any open <p> in the row.
2919: if ($target eq 'web' || $target eq 'webgrade') {
2920: $currentstring .= $token->[2];
2921: } elsif ($target eq 'tex') {
2922: $Apache::londefdef::TD_redirection =0;
2923: &end_th_tex($parstack,$parser,$safeeval);
2924: }
2925: return $currentstring;
2926: }
2927:
2928: #-- <img> tag (end tag forbidden)
2929: #
2930: # Render the <IMG> tag.
2931: # <IMG> has the following attributes (in addition to the
2932: # standard HTML ones:
2933: # TeXwrap - Governs how the tex target will try to wrap text around
2934: # horizontally aligned images.
2935: # TeXwidth - The width of the image when rendered for print (mm).
2936: # TeXheight - The height of the image when rendered for print (mm)
2937: # (Note there seems to also be support for this as a % of page size)
2938: #
2939: sub start_img {
2940: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2941: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2942: undef,1);
2943: if (! $src &&
2944: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2945: ) {
2946: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2947: return '';
2948: }
2949: &Apache::lonxml::extlink($src);
2950: my $currentstring = '';
2951: my $scaling = .3;
2952:
2953: # Render unto browsers that which are the browser's...
2954:
2955: if ($target eq 'web' || $target eq 'webgrade') {
2956: if ($env{'browser.imagesuppress'} ne 'on') {
2957: my $enc = ('yes' eq
2958: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2959: $safeeval)));
2960: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2961: $enc);
2962: } else {
2963: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2964: undef,1);
2965: if (!$alttag) {
2966: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2967: $src);
2968: }
2969: $currentstring.='[IMAGE: '.$alttag.']';
2970: }
2971:
2972: # and render unto TeX that which is LaTeX
2973:
2974: } elsif ($target eq 'tex') {
2975: #
2976: # The alignment will require some superstructure to be put around
2977: # the \includegraphics stuff. At present we can only partially
2978: # simulate the alignments offered by html.
2979: #
2980: #
2981: my $align = lc(&Apache::lonxml::get_param('align',
2982: $parstack,
2983: $safeeval,
2984: undef,1));
2985: if(!$align) {
2986: $align = "bottom"; # This is html's default so it's ours too.
2987: }
2988: #
2989: &Apache::lonxml::debug("Alignemnt = $align");
2990: # LaTeX's image/text wrapping is really bad since it wants to
2991: # make figures float.
2992: # The user has the optional parameter (applicable only to l/r
2993: # alignment to use the picins/parpic directive to get wrapped text
2994: # this is also imperfect.. that's why we give them a choice...
2995: # so they can't yell at us for our choice.
2996: #
2997: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2998: $parstack,
2999: $safeeval,
3000: undef,0);
3001: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
3002: if(!$latex_rendering) {
3003: $latex_rendering = "texwrap";
3004: }
3005: # using texwrap inside a table does not work. So, if after all of this,
3006: # texwrap is on, we turn it off if we detect we're in a table:
3007: #
3008: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
3009: $latex_rendering = 'parpic';
3010: }
3011:
3012: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
3013:
3014: #if original gif/jpg/png file exist do following:
3015: my $origsrc=$src;
3016: my ($path,$file) = &get_eps_image($src);
3017: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
3018: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
3019: &Apache::lonxml::debug("path = $path file = $file src = $src");
3020: if (-e $src) {
3021: &Apache::lonxml::debug("$src exists");
3022: my ($height_param,$width_param)=
3023: &image_size($origsrc,0.3,$parstack,$safeeval);
3024: my $size;
3025: if ($width_param) { $size.='width='.$width_param.' mm,'; }
3026: if ($height_param) { $size.='height='.$height_param.' mm]'; }
3027: # Default size if not able to extract that (e.g. eps image).
3028:
3029: # &Apache::lonnet::logthis("Size = $size");
3030:
3031: $size='['.$size;
3032: $size=~s/,$/]/;
3033: $currentstring .= '\graphicspath{{'.$path.'}}'
3034: .'\includegraphics'.$size.'{'.$file.'} ';
3035: my $closure;
3036: ($currentstring, $closure) = &align_latex_image($align,
3037: $latex_rendering,
3038: $currentstring,
3039: $width_param,
3040: $height_param);
3041: $currentstring .= $closure;
3042:
3043: } else {
3044: &Apache::lonxml::debug("$src does not exist");
3045: #original image file doesn't exist so check the alt attribute
3046: my $alt =
3047: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
3048: unless ($alt) {
3049: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3050: }
3051:
3052: if ($alt) { $currentstring .= ' '.$alt.' '; }
3053: }
3054:
3055: # And here's where the semi-quote breaks down: allow the user
3056: # to edit the beast as well by rendering the problem for edit:
3057: } elsif ($target eq 'edit') {
3058: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
3059: $currentstring .=&Apache::edit::tag_start($target,$token);
3060: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
3061: &Apache::edit::browse('src',undef,'alt',$only).' '.
3062: &Apache::edit::search('src',undef,'alt').'<br />';
3063: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
3064: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
3065: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
3066: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
3067: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
3068: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
3069: ['','bottom','middle','top','left','right'],$token,5);
3070: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
3071: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
3072: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
3073: ['no','yes'], $token, 2);
3074: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
3075: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
3076: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
3077: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
3078: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
3079:
3080: if ($token->[2]{'src'}=~/\$/) {
3081: $currentstring.='Variable image source';
3082: } else {
3083: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
3084: if ($width) { $currentstring.=' width="'.$width.'" '; }
3085: if ($height) { $currentstring.=' height="'.$height.'" '; }
3086: $currentstring .= ' />';
3087: }
3088: } elsif ($target eq 'modified') {
3089: my ($osrc,$owidth,$oheight)=
3090: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3091: my $ctag=&Apache::edit::get_new_args($token,$parstack,
3092: $safeeval,'src','alt','align',
3093: 'TeXwidth','TeXheight', 'TeXwrap',
3094: 'width','height','encrypturl');
3095: my ($nsrc,$nwidth,$nheight)=
3096: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3097: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
3098: &image_replication($loc);
3099: my ($iwidth,$iheight);
3100: if (-e $loc) {
3101: my $image = Image::Magick->new;
3102: $image->Read($loc);
3103: ($iwidth, $iheight) = ($image->Get('width'),
3104: $image->Get('height'));
3105: }
3106: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
3107: # changed image or no size specified,
3108: # if they didn't explicitly change the
3109: # width or height use the ones from the image
3110: if ($iwidth && $iheight) {
3111: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
3112: $token->[2]{'width'} = $iwidth;$ctag=1;
3113: }
3114: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
3115: $token->[2]{'height'}=$iheight;$ctag=1;
3116: }
3117: }
3118: }
3119: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
3120: # if we don't have a width or height
3121: if ($iwidth && $cwidth && !$cheight) {
3122: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
3123: }
3124: if ($iheight && $cheight && !$cwidth) {
3125: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
3126: }
3127: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3128: }
3129:
3130: return $currentstring;
3131: }
3132:
3133: sub end_img {
3134: my ($target,$token) = @_;
3135: my $currentstring = '';
3136: if ($target eq 'web' || $target eq 'webgrade') {
3137: $currentstring = $token->[2];
3138: } elsif ($target eq 'tex') {
3139: $currentstring = '';
3140: }
3141: return $currentstring;
3142: }
3143:
3144: #-- <applet> tag (end tag required)
3145: sub start_applet {
3146: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3147:
3148: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3149: &Apache::lonxml::extlink($code);
3150: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3151: undef,1);
3152: &Apache::lonxml::extlink($archive);
3153: my $currentstring = '';
3154: if ($target eq 'web' || $target eq 'webgrade') {
3155: if ($env{'browser.appletsuppress'} ne 'on') {
3156: $currentstring = &Apache::lonenc::encrypt_ref($token,
3157: {'code'=>$code,
3158: 'archive'=>$archive}
3159: );
3160: } else {
3161: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3162: $safeeval,undef,1);
3163: unless ($alttag) {
3164: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3165: $code);
3166: }
3167: $currentstring='[APPLET: '.$alttag.']';
3168: }
3169: } elsif ($target eq 'tex') {
3170: # Turn off some stuff we can't be inside thank you LaTeX
3171:
3172:
3173: my $restart_sub = 0;
3174: my $restart_sup = 0;
3175:
3176: # Since <sub> and <sup> are simple tags it's ok to turn off/on
3177: # using the start_ stop_ functions.. those tags only care about
3178: # $target.
3179:
3180: if (&is_inside_of($tagstack, "sub")) {
3181: $restart_sub = 1;
3182: $currentstring .= &end_sub($target, $token, $tagstack,
3183: $parstack, $parser, $safeeval);
3184: }
3185: if (&is_inside_of($tagstack, "sup")) {
3186: $restart_sup = 1;
3187: $currentstring .= &end_sup($target, $token, $tagstack,
3188: $parstack, $parser, $safeeval);
3189: }
3190:
3191: # Now process the applet; just replace it with its alt attribute.
3192:
3193: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3194: $safeeval,undef,1);
3195: unless ($alttag) {
3196: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3197: undef,1);
3198: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3199: $code);
3200: }
3201: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3202: '.}\end{center}';
3203:
3204: # Turn stuff back on that we can't be inside of.
3205:
3206: if ($restart_sub) {
3207: $currentstring .= &start_sub($target, $token, $tagstack,
3208: $parstack, $parser, $safeeval);
3209: }
3210: if ($restart_sup) {
3211: $currentstring .= &start_sup($target, $token, $tagstack,
3212: $parstack, $parser, $safeeval);
3213: }
3214: }
3215: return $currentstring;
3216: }
3217:
3218: sub end_applet {
3219: my ($target,$token) = @_;
3220: my $currentstring = '';
3221: if ($target eq 'web' || $target eq 'webgrade') {
3222: $currentstring = $token->[2];
3223: } elsif ($target eq 'tex') {
3224: }
3225: return $currentstring;
3226: }
3227:
3228: #-- <embed> tag (end tag optional/required)
3229: sub start_embed {
3230: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3231: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3232: &Apache::lonxml::extlink($src);
3233: my $currentstring = '';
3234: if ($target eq 'web' || $target eq 'webgrade') {
3235: if ($env{'browser.embedsuppress'} ne 'on') {
3236: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3237: } else {
3238: my $alttag=&Apache::lonxml::get_param
3239: ('alt',$parstack,$safeeval,undef,1);
3240: unless ($alttag) {
3241: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3242: }
3243: $currentstring='[EMBED: '.$alttag.']';
3244: }
3245: } elsif ($target eq 'tex') {
3246: }
3247: return $currentstring;
3248: }
3249:
3250: sub end_embed {
3251: my ($target,$token) = @_;
3252: my $currentstring = '';
3253: if ($target eq 'web' || $target eq 'webgrade') {
3254: $currentstring = $token->[2];
3255: } elsif ($target eq 'tex') {
3256: }
3257: return $currentstring;
3258: }
3259:
3260: #-- <param> tag (end tag forbidden)
3261: sub start_param {
3262: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3263: if (&Apache::lonxml::get_param('name',$parstack,
3264: $safeeval,undef,1)=~/^cabbase$/i) {
3265: my $value=&Apache::lonxml::get_param('value',$parstack,
3266: $safeeval,undef,1);
3267: &Apache::lonxml::extlink($value);
3268: }
3269:
3270: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3271: &Apache::lonxml::extlink($src);
3272: my $currentstring = '';
3273: if ($target eq 'web' || $target eq 'webgrade') {
3274: my %toconvert;
3275: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3276: if ($src) { $toconvert{'src'}= $src; }
3277: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3278: undef,1);
3279: if ($name=~/^cabbase$/i) {
3280: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3281: $safeeval,undef,1);
3282: }
3283: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3284: } elsif ($target eq 'tex') {
3285: }
3286: return $currentstring;
3287: }
3288:
3289: sub end_param {
3290: my ($target,$token) = @_;
3291: my $currentstring = '';
3292: if ($target eq 'web' || $target eq 'webgrade') {
3293: $currentstring = $token->[2];
3294: } elsif ($target eq 'tex') {
3295: }
3296: return $currentstring;
3297: }
3298:
3299: #-- <allow> tag
3300: sub start_allow {
3301: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3302: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3303: &Apache::lonxml::extlink($src);
3304:
3305: if ($target eq 'tex') { &image_replication($src); }
3306: my $result;
3307: if ($target eq 'edit') {
3308: $result .=&Apache::edit::tag_start($target,$token);
3309: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3310: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3311: } elsif ($target eq 'modified') {
3312: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3313: $safeeval,'src');
3314: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3315: }
3316: return $result;
3317: }
3318:
3319: sub end_allow {
3320: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3321: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3322: return '';
3323: }
3324:
3325: #-- Frames (end tag required)
3326: #-- <frameset>
3327: sub start_frameset {
3328: my ($target,$token) = @_;
3329: my $currentstring = ''; # Close any pending para.
3330: if ($target eq 'web' || $target eq 'webgrade') {
3331: $currentstring =
3332: &Apache::loncommon::start_page($Apache::londefdef::title,
3333: $Apache::londefdef::head,
3334: {'add_entries' => $token->[2],
3335: 'no_title' => 1,
3336: 'force_register' => 1,
3337: 'frameset' => 1,});
3338:
3339: }
3340: return $currentstring;
3341: }
3342:
3343: sub end_frameset {
3344: my ($target,$token) = @_;
3345: my $currentstring = '';
3346: if ($target eq 'web' || $target eq 'webgrade') {
3347: $currentstring = $token->[2];
3348: }
3349: return $currentstring;
3350: }
3351:
3352: #-- <xmp> (end tag required)
3353: sub start_xmp {
3354: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3355: my $currentstring = '';
3356: if ($target eq 'web' || $target eq 'webgrade') {
3357: $currentstring .= $token->[4];
3358: } elsif ($target eq 'tex') {
3359: $currentstring .= '\begin{verbatim}';
3360: }
3361: return $currentstring;
3362: }
3363:
3364: sub end_xmp {
3365: my ($target,$token) = @_;
3366: my $currentstring = '';
3367: if ($target eq 'web' || $target eq 'webgrade') {
3368: $currentstring .= $token->[2];
3369: } elsif ($target eq 'tex') {
3370: $currentstring .= '\end{verbatim}';
3371: }
3372: return $currentstring;
3373: }
3374:
3375: #-- <pre> (end tag required)
3376: sub start_pre {
3377: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3378: my $currentstring = &end_p(); # close off pending <p>
3379: if ($target eq 'web' || $target eq 'webgrade') {
3380: $currentstring .= $token->[4];
3381: } elsif ($target eq 'tex') {
3382: $currentstring .= '\begin{verbatim}';
3383: &Apache::lonxml::disable_LaTeX_substitutions();
3384: }
3385: return $currentstring;
3386: }
3387:
3388: sub end_pre {
3389: my ($target,$token) = @_;
3390: my $currentstring = '';
3391: if ($target eq 'web' || $target eq 'webgrade') {
3392: $currentstring .= $token->[2];
3393: } elsif ($target eq 'tex') {
3394: $currentstring .= '\end{verbatim}';
3395: &Apache::lonxml::enable_LaTeX_substitutions();
3396: }
3397: return $currentstring;
3398: }
3399:
3400: #-- <insert>
3401: sub start_insert {
3402: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3403: my $currentstring = '';
3404: if ($target eq 'web' || $target eq 'webgrade') {
3405: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3406: $currentstring .= '<b>'.$display.'</b>';;
3407: }
3408: return $currentstring;
3409: }
3410:
3411: sub end_insert {
3412: my ($target,$token) = @_;
3413: my $currentstring = '';
3414: if ($target eq 'web' || $target eq 'webgrade') {
3415: $currentstring .= '';
3416: }
3417: return $currentstring;
3418: }
3419:
3420: #-- <externallink>
3421: sub start_externallink {
3422: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3423: my $currentstring = '';
3424: if ($target eq 'web' || $target eq 'webgrade') {
3425: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3426: $currentstring .= '<b>'.$display.'</b>';;
3427: }
3428: return $currentstring;
3429: }
3430:
3431: sub end_externallink {
3432: my ($target,$token) = @_;
3433: my $currentstring = '';
3434: if ($target eq 'web' || $target eq 'webgrade') {
3435: $currentstring .= '';
3436: }
3437: return $currentstring;
3438: }
3439:
3440: #-- <blankspace heigth="">
3441: sub start_blankspace {
3442: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3443: my $currentstring = &end_p(); # closes off any unclosed <p>
3444: if ($target eq 'tex') {
3445: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3446: $currentstring .= '\vskip '.$howmuch.' ';
3447: }
3448: return $currentstring;
3449: }
3450:
3451: sub end_blankspace {
3452: my ($target,$token) = @_;
3453: my $currentstring = '';
3454: if ($target eq 'tex') {
3455: $currentstring .= '';
3456: }
3457: return $currentstring;
3458: }
3459:
3460: #-- <abbr> tag (end tag required)
3461: sub start_abbr {
3462: my ($target,$token) = @_;
3463: my $currentstring = '';
3464: if ($target eq 'web' || $target eq 'webgrade') {
3465: $currentstring = $token->[4];
3466: }
3467: return $currentstring;
3468: }
3469:
3470: sub end_abbr {
3471: my ($target,$token) = @_;
3472: my $currentstring = '';
3473: if ($target eq 'web' || $target eq 'webgrade') {
3474: $currentstring = $token->[2];
3475: }
3476: return $currentstring;
3477: }
3478:
3479: #-- <acronym> tag (end tag required)
3480: sub start_acronym {
3481: my ($target,$token) = @_;
3482: my $currentstring = '';
3483: if ($target eq 'web' || $target eq 'webgrade') {
3484: $currentstring = $token->[4];
3485: }
3486: return $currentstring;
3487: }
3488:
3489: sub end_acronym {
3490: my ($target,$token) = @_;
3491: my $currentstring = '';
3492: if ($target eq 'web' || $target eq 'webgrade') {
3493: $currentstring = $token->[2];
3494: }
3495: return $currentstring;
3496: }
3497:
3498: #-- <area> tag (end tag forbidden)
3499: sub start_area {
3500: my ($target,$token) = @_;
3501: my $currentstring = '';
3502: if ($target eq 'web' || $target eq 'webgrade') {
3503: $currentstring = $token->[4];
3504: }
3505: return $currentstring;
3506: }
3507:
3508: sub end_area {
3509: my ($target,$token) = @_;
3510: my $currentstring = '';
3511: if ($target eq 'web' || $target eq 'webgrade') {
3512: $currentstring = $token->[2];
3513: }
3514: return $currentstring;
3515: }
3516:
3517: #-- <base> tag (end tag forbidden)
3518: sub start_base {
3519: my ($target,$token) = @_;
3520: my $currentstring = '';
3521: if ($target eq 'web' || $target eq 'webgrade') {
3522: $currentstring = $token->[4];
3523: }
3524: return $currentstring;
3525: }
3526:
3527: sub end_base {
3528: my ($target,$token) = @_;
3529: my $currentstring = '';
3530: if ($target eq 'web' || $target eq 'webgrade') {
3531: $currentstring = $token->[2];
3532: }
3533: return $currentstring;
3534: }
3535:
3536: #-- <bdo> tag (end tag required)
3537: sub start_bdo {
3538: my ($target,$token) = @_;
3539: my $currentstring = '';
3540: if ($target eq 'web' || $target eq 'webgrade') {
3541: $currentstring = $token->[4];
3542: }
3543: return $currentstring;
3544: }
3545:
3546: sub end_bdo {
3547: my ($target,$token) = @_;
3548: my $currentstring = '';
3549: if ($target eq 'web' || $target eq 'webgrade') {
3550: $currentstring = $token->[2];
3551: }
3552: return $currentstring;
3553: }
3554:
3555: #-- <bgsound> tag (end tag optional)
3556: sub start_bgsound {
3557: my ($target,$token) = @_;
3558: my $currentstring = '';
3559: if ($target eq 'web' || $target eq 'webgrade') {
3560: $currentstring = $token->[4];
3561: }
3562: return $currentstring;
3563: }
3564:
3565: sub end_bgsound {
3566: my ($target,$token) = @_;
3567: my $currentstring = '';
3568: if ($target eq 'web' || $target eq 'webgrade') {
3569: $currentstring = $token->[2];
3570: }
3571: return $currentstring;
3572: }
3573:
3574: #-- <blink> tag (end tag required)
3575: sub start_blink {
3576: my ($target,$token) = @_;
3577: my $currentstring = '';
3578: if ($target eq 'web' || $target eq 'webgrade') {
3579: $currentstring = $token->[4];
3580: }
3581: return $currentstring;
3582: }
3583:
3584: sub end_blink {
3585: my ($target,$token) = @_;
3586: my $currentstring = '';
3587: if ($target eq 'web' || $target eq 'webgrade') {
3588: $currentstring = $token->[2];
3589: }
3590: return $currentstring;
3591: }
3592:
3593: #-- <blockquote> tag (end tag required)
3594: sub start_blockquote {
3595: my ($target,$token) = @_;
3596: my $currentstring = &end_p(); # Close any unclosed <p>
3597: if ($target eq 'web' || $target eq 'webgrade') {
3598: $currentstring .= $token->[4];
3599: }
3600: if ($target eq 'tex') {
3601: $currentstring .= '\begin{quote}';
3602: }
3603: return $currentstring;
3604: }
3605:
3606: sub end_blockquote {
3607: my ($target,$token) = @_;
3608: my $currentstring = '';
3609: if ($target eq 'web' || $target eq 'webgrade') {
3610: $currentstring = $token->[2];
3611: }
3612: if ($target eq 'tex') {
3613: $currentstring = '\end{quote}';
3614: }
3615: return $currentstring;
3616: }
3617:
3618: #-- <button> tag (end tag required)
3619: sub start_button {
3620: my ($target,$token) = @_;
3621: my $currentstring = '';
3622: if ($target eq 'web' || $target eq 'webgrade') {
3623: $currentstring = $token->[4];
3624: }
3625: return $currentstring;
3626: }
3627:
3628: sub end_button {
3629: my ($target,$token) = @_;
3630: my $currentstring = '';
3631: if ($target eq 'web' || $target eq 'webgrade') {
3632: $currentstring = $token->[2];
3633: }
3634: return $currentstring;
3635: }
3636:
3637: #-- <caption> tag (end tag required)
3638: sub start_caption {
3639: my ($target,$token) = @_;
3640: my $currentstring = '';
3641: if ($target eq 'web' || $target eq 'webgrade') {
3642: $currentstring = $token->[4];
3643: }
3644: return $currentstring;
3645: }
3646:
3647: sub end_caption {
3648: my ($target,$token) = @_;
3649: my $currentstring = '';
3650: if ($target eq 'web' || $target eq 'webgrade') {
3651: $currentstring = $token->[2];
3652: }
3653: return $currentstring;
3654: }
3655:
3656: #-- <col> tag (end tag forbdden)
3657: sub start_col {
3658: my ($target,$token) = @_;
3659: my $currentstring = '';
3660: if ($target eq 'web' || $target eq 'webgrade') {
3661: $currentstring = $token->[4];
3662: }
3663: return $currentstring;
3664: }
3665:
3666: sub end_col {
3667: my ($target,$token) = @_;
3668: my $currentstring = '';
3669: if ($target eq 'web' || $target eq 'webgrade') {
3670: $currentstring = $token->[2];
3671: }
3672: return $currentstring;
3673: }
3674:
3675: #-- <colgroup> tag (end tag optional)
3676: sub start_colgroup {
3677: my ($target,$token) = @_;
3678: my $currentstring = '';
3679: if ($target eq 'web' || $target eq 'webgrade') {
3680: $currentstring = $token->[4];
3681: }
3682: return $currentstring;
3683: }
3684:
3685: sub end_colgroup {
3686: my ($target,$token) = @_;
3687: my $currentstring = '';
3688: if ($target eq 'web' || $target eq 'webgrade') {
3689: $currentstring = $token->[2];
3690: }
3691: return $currentstring;
3692: }
3693:
3694: #-- <del> tag (end tag required)
3695: sub start_del {
3696: my ($target,$token) = @_;
3697: my $currentstring = '';
3698: if ($target eq 'web' || $target eq 'webgrade') {
3699: $currentstring = $token->[4];
3700: }
3701: return $currentstring;
3702: }
3703:
3704: sub end_del {
3705: my ($target,$token) = @_;
3706: my $currentstring = '';
3707: if ($target eq 'web' || $target eq 'webgrade') {
3708: $currentstring = $token->[2];
3709: }
3710: return $currentstring;
3711: }
3712:
3713: #-- <fieldset> tag (end tag required)
3714: sub start_fieldset {
3715: my ($target,$token) = @_;
3716: my $currentstring = '';
3717: if ($target eq 'web' || $target eq 'webgrade') {
3718: $currentstring = $token->[4];
3719: }
3720: return $currentstring;
3721: }
3722:
3723: sub end_fieldset {
3724: my ($target,$token) = @_;
3725: my $currentstring = '';
3726: if ($target eq 'web' || $target eq 'webgrade') {
3727: $currentstring = $token->[2];
3728: }
3729: return $currentstring;
3730: }
3731:
3732: #-- <frame> tag (end tag forbidden)
3733: sub start_frame {
3734: my ($target,$token) = @_;
3735: my $currentstring = '';
3736: if ($target eq 'web' || $target eq 'webgrade') {
3737: $currentstring = $token->[4];
3738: }
3739: return $currentstring;
3740: }
3741:
3742: sub end_frame {
3743: my ($target,$token) = @_;
3744: my $currentstring = '';
3745: if ($target eq 'web' || $target eq 'webgrade') {
3746: $currentstring = $token->[2];
3747: }
3748: return $currentstring;
3749: }
3750:
3751: #-- <iframe> tag (end tag required)
3752: sub start_iframe {
3753: my ($target,$token) = @_;
3754: my $currentstring = '';
3755: if ($target eq 'web' || $target eq 'webgrade') {
3756: $currentstring = $token->[4];
3757: }
3758: return $currentstring;
3759: }
3760:
3761: sub end_iframe {
3762: my ($target,$token) = @_;
3763: my $currentstring = '';
3764: if ($target eq 'web' || $target eq 'webgrade') {
3765: $currentstring = $token->[2];
3766: }
3767: return $currentstring;
3768: }
3769:
3770: #-- <ins> tag (end tag required)
3771: sub start_ins {
3772: my ($target,$token) = @_;
3773: my $currentstring = '';
3774: if ($target eq 'web' || $target eq 'webgrade') {
3775: $currentstring = $token->[4];
3776: }
3777: return $currentstring;
3778: }
3779:
3780: sub end_ins {
3781: my ($target,$token) = @_;
3782: my $currentstring = '';
3783: if ($target eq 'web' || $target eq 'webgrade') {
3784: $currentstring = $token->[2];
3785: }
3786: return $currentstring;
3787: }
3788:
3789: #-- <isindex> tag (end tag forbidden)
3790: sub start_isindex {
3791: my ($target,$token) = @_;
3792: my $currentstring = '';
3793: if ($target eq 'web' || $target eq 'webgrade') {
3794: $currentstring = $token->[4];
3795: }
3796: return $currentstring;
3797: }
3798:
3799: sub end_isindex {
3800: my ($target,$token) = @_;
3801: my $currentstring = '';
3802: if ($target eq 'web' || $target eq 'webgrade') {
3803: $currentstring = $token->[2];
3804: }
3805: return $currentstring;
3806: }
3807:
3808: #-- <keygen> tag (end tag forbidden)
3809: sub start_keygen {
3810: my ($target,$token) = @_;
3811: my $currentstring = '';
3812: if ($target eq 'web' || $target eq 'webgrade') {
3813: $currentstring = $token->[4];
3814: }
3815: return $currentstring;
3816: }
3817:
3818: sub end_keygen {
3819: my ($target,$token) = @_;
3820: my $currentstring = '';
3821: if ($target eq 'web' || $target eq 'webgrade') {
3822: $currentstring = $token->[2];
3823: }
3824: return $currentstring;
3825: }
3826:
3827: #-- <label> tag
3828: sub start_label {
3829: my ($target,$token) = @_;
3830: my $currentstring = '';
3831: if ($target eq 'web' || $target eq 'webgrade') {
3832: $currentstring = $token->[4];
3833: }
3834: return $currentstring;
3835: }
3836:
3837: sub end_label {
3838: my ($target,$token) = @_;
3839: my $currentstring = '';
3840: if ($target eq 'web' || $target eq 'webgrade') {
3841: $currentstring = $token->[2];
3842: }
3843: return $currentstring;
3844: }
3845:
3846: #-- <layer> tag (end tag required)
3847: sub start_layer {
3848: my ($target,$token) = @_;
3849: my $currentstring = '';
3850: if ($target eq 'web' || $target eq 'webgrade') {
3851: $currentstring = $token->[4];
3852: }
3853: return $currentstring;
3854: }
3855:
3856: sub end_layer {
3857: my ($target,$token) = @_;
3858: my $currentstring = '';
3859: if ($target eq 'web' || $target eq 'webgrade') {
3860: $currentstring = $token->[2];
3861: }
3862: return $currentstring;
3863: }
3864:
3865: #-- <legend> tag (end tag required)
3866: sub start_legend {
3867: my ($target,$token) = @_;
3868: my $currentstring = '';
3869: if ($target eq 'web' || $target eq 'webgrade') {
3870: $currentstring = $token->[4];
3871: }
3872: return $currentstring;
3873: }
3874:
3875: sub end_legend {
3876: my ($target,$token) = @_;
3877: my $currentstring = '';
3878: if ($target eq 'web' || $target eq 'webgrade') {
3879: $currentstring = $token->[2];
3880: }
3881: return $currentstring;
3882: }
3883:
3884: #-- <link> tag (end tag forbidden)
3885: sub start_link {
3886: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3887: my $currentstring = '';
3888: if ($target eq 'web' || $target eq 'webgrade') {
3889: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3890: undef,1);
3891: &Apache::lonxml::extlink($href);
3892: $currentstring = $token->[4];
3893: }
3894: return $currentstring;
3895: }
3896:
3897: sub end_link {
3898: my ($target,$token) = @_;
3899: my $currentstring = '';
3900: if ($target eq 'web' || $target eq 'webgrade') {
3901: $currentstring = $token->[2];
3902: }
3903: return $currentstring;
3904: }
3905:
3906: #-- <marquee> tag (end tag optional)
3907: sub start_marquee {
3908: my ($target,$token) = @_;
3909: my $currentstring = '';
3910: if ($target eq 'web' || $target eq 'webgrade') {
3911: $currentstring = $token->[4];
3912: }
3913: return $currentstring;
3914: }
3915:
3916: sub end_marquee {
3917: my ($target,$token) = @_;
3918: my $currentstring = '';
3919: if ($target eq 'web' || $target eq 'webgrade') {
3920: $currentstring = $token->[2];
3921: }
3922: return $currentstring;
3923: }
3924:
3925: #-- <multicol> tag (end tag required)
3926: sub start_multicol {
3927: my ($target,$token) = @_;
3928: my $currentstring = &end_p(); # Close any pending <p>
3929: if ($target eq 'web' || $target eq 'webgrade') {
3930: $currentstring .= $token->[4];
3931: }
3932: return $currentstring;
3933: }
3934:
3935: sub end_multicol {
3936: my ($target,$token) = @_;
3937: my $currentstring = '';
3938: if ($target eq 'web' || $target eq 'webgrade') {
3939: $currentstring = $token->[2];
3940: }
3941: return $currentstring;
3942: }
3943:
3944: #-- <nobr> tag (end tag required)
3945: sub start_nobr {
3946: my ($target,$token) = @_;
3947: my $currentstring = '';
3948: if ($target eq 'web' || $target eq 'webgrade') {
3949: $currentstring = $token->[4];
3950: } elsif ($target eq 'tex') {
3951: $currentstring='\mbox{';
3952: }
3953: return $currentstring;
3954: }
3955:
3956: sub end_nobr {
3957: my ($target,$token) = @_;
3958: my $currentstring = '';
3959: if ($target eq 'web' || $target eq 'webgrade') {
3960: $currentstring = $token->[2];
3961: } elsif ($target eq 'tex') {
3962: $currentstring='}';
3963: }
3964: return $currentstring;
3965: }
3966:
3967: #-- <noembed> tag (end tag required)
3968: sub start_noembed {
3969: my ($target,$token) = @_;
3970: my $currentstring = '';
3971: if ($target eq 'web' || $target eq 'webgrade') {
3972: $currentstring = $token->[4];
3973: }
3974: return $currentstring;
3975: }
3976:
3977: sub end_noembed {
3978: my ($target,$token) = @_;
3979: my $currentstring = '';
3980: if ($target eq 'web' || $target eq 'webgrade') {
3981: $currentstring = $token->[2];
3982: }
3983: return $currentstring;
3984: }
3985:
3986: #-- <noframes> tag (end tag required)
3987: sub start_noframes {
3988: my ($target,$token) = @_;
3989: my $currentstring = '';
3990: if ($target eq 'web' || $target eq 'webgrade') {
3991: $currentstring = $token->[4];
3992: }
3993: return $currentstring;
3994: }
3995:
3996: sub end_noframes {
3997: my ($target,$token) = @_;
3998: my $currentstring = '';
3999: if ($target eq 'web' || $target eq 'webgrade') {
4000: $currentstring = $token->[2];
4001: }
4002: return $currentstring;
4003: }
4004:
4005: #-- <nolayer> tag (end tag required)
4006: sub start_nolayer {
4007: my ($target,$token) = @_;
4008: my $currentstring = '';
4009: if ($target eq 'web' || $target eq 'webgrade') {
4010: $currentstring = $token->[4];
4011: }
4012: return $currentstring;
4013: }
4014:
4015: sub end_nolayer {
4016: my ($target,$token) = @_;
4017: my $currentstring = '';
4018: if ($target eq 'web' || $target eq 'webgrade') {
4019: $currentstring = $token->[2];
4020: }
4021: return $currentstring;
4022: }
4023:
4024: #-- <noscript> tag (end tag required)
4025: sub start_noscript {
4026: my ($target,$token) = @_;
4027: my $currentstring = '';
4028: if ($target eq 'web' || $target eq 'webgrade') {
4029: $currentstring = $token->[4];
4030: }
4031: return $currentstring;
4032: }
4033:
4034: sub end_noscript {
4035: my ($target,$token) = @_;
4036: my $currentstring = '';
4037: if ($target eq 'web' || $target eq 'webgrade') {
4038: $currentstring = $token->[2];
4039: }
4040: return $currentstring;
4041: }
4042:
4043: #-- <object> tag (end tag required)
4044: sub start_object {
4045: my ($target,$token) = @_;
4046: my $currentstring = '';
4047: if ($target eq 'web' || $target eq 'webgrade') {
4048: $currentstring = $token->[4];
4049: }
4050: return $currentstring;
4051: }
4052:
4053: sub end_object {
4054: my ($target,$token) = @_;
4055: my $currentstring = '';
4056: if ($target eq 'web' || $target eq 'webgrade') {
4057: $currentstring = $token->[2];
4058: }
4059: return $currentstring;
4060: }
4061:
4062: #-- <optgroup> tag (end tag required)
4063: sub start_optgroup {
4064: my ($target,$token) = @_;
4065: my $currentstring = '';
4066: if ($target eq 'web' || $target eq 'webgrade') {
4067: $currentstring = $token->[4];
4068: }
4069: return $currentstring;
4070: }
4071:
4072: sub end_optgroup {
4073: my ($target,$token) = @_;
4074: my $currentstring = '';
4075: if ($target eq 'web' || $target eq 'webgrade') {
4076: $currentstring = $token->[2];
4077: }
4078: return $currentstring;
4079: }
4080:
4081: #-- <samp> tag (end tag required)
4082: sub start_samp {
4083: my ($target,$token) = @_;
4084: my $currentstring = '';
4085: if ($target eq 'web' || $target eq 'webgrade') {
4086: $currentstring = $token->[4];
4087: } elsif ($target eq 'tex') {
4088: $currentstring='\texttt{';
4089: }
4090: return $currentstring;
4091: }
4092:
4093: sub end_samp {
4094: my ($target,$token) = @_;
4095: my $currentstring = '';
4096: if ($target eq 'web' || $target eq 'webgrade') {
4097: $currentstring = $token->[2];
4098: } elsif ($target eq 'tex') {
4099: $currentstring='}';
4100: }
4101: return $currentstring;
4102: }
4103:
4104: #-- <server> tag
4105: sub start_server {
4106: my ($target,$token) = @_;
4107: my $currentstring = '';
4108: if ($target eq 'web' || $target eq 'webgrade') {
4109: $currentstring = $token->[4];
4110: }
4111: return $currentstring;
4112: }
4113:
4114: sub end_server {
4115: my ($target,$token) = @_;
4116: my $currentstring = '';
4117: if ($target eq 'web' || $target eq 'webgrade') {
4118: $currentstring = $token->[2];
4119: }
4120: return $currentstring;
4121: }
4122:
4123: #-- <spacer> tag (end tag forbidden)
4124: sub start_spacer {
4125: my ($target,$token) = @_;
4126: my $currentstring = &end_p(); # Close off any open <p> tag.
4127: if ($target eq 'web' || $target eq 'webgrade') {
4128: $currentstring .= $token->[4];
4129: }
4130: return $currentstring;
4131: }
4132:
4133: sub end_spacer {
4134: my ($target,$token) = @_;
4135: my $currentstring = '';
4136: if ($target eq 'web' || $target eq 'webgrade') {
4137: $currentstring = $token->[2];
4138: }
4139: return $currentstring;
4140: }
4141:
4142: #-- <span> tag (end tag required)
4143: sub start_span {
4144: my ($target,$token) = @_;
4145: my $currentstring = '';
4146: if ($target eq 'web' || $target eq 'webgrade') {
4147: $currentstring = $token->[4];
4148: }
4149: return $currentstring;
4150: }
4151:
4152: sub end_span {
4153: my ($target,$token) = @_;
4154: my $currentstring = '';
4155: if ($target eq 'web' || $target eq 'webgrade') {
4156: $currentstring = $token->[2];
4157: }
4158: return $currentstring;
4159: }
4160:
4161: #-- <tbody> tag (end tag optional)
4162: sub start_tbody {
4163: my ($target,$token) = @_;
4164: my $currentstring = '';
4165: if ($target eq 'web' || $target eq 'webgrade') {
4166: $currentstring = $token->[4];
4167: }
4168: return $currentstring;
4169: }
4170:
4171: sub end_tbody {
4172: my ($target,$token) = @_;
4173: my $currentstring = '';
4174: if ($target eq 'web' || $target eq 'webgrade') {
4175: $currentstring = $token->[2];
4176: }
4177: return $currentstring;
4178: }
4179:
4180: #-- <tfoot> tag (end tag optional)
4181: sub start_tfoot {
4182: my ($target,$token) = @_;
4183: my $currentstring = '';
4184: if ($target eq 'web' || $target eq 'webgrade') {
4185: $currentstring = $token->[4];
4186: }
4187: return $currentstring;
4188: }
4189:
4190: sub end_tfoot {
4191: my ($target,$token) = @_;
4192: my $currentstring = '';
4193: if ($target eq 'web' || $target eq 'webgrade') {
4194: $currentstring = $token->[2];
4195: }
4196: return $currentstring;
4197: }
4198:
4199: #-- <thead> tag (end tag optional)
4200: sub start_thead {
4201: my ($target,$token) = @_;
4202: my $currentstring = '';
4203: if ($target eq 'web' || $target eq 'webgrade') {
4204: $currentstring = $token->[4];
4205: }
4206: return $currentstring;
4207: }
4208:
4209: sub end_thead {
4210: my ($target,$token) = @_;
4211: my $currentstring = '';
4212: if ($target eq 'web' || $target eq 'webgrade') {
4213: $currentstring = $token->[2];
4214: }
4215: return $currentstring;
4216: }
4217:
4218: #-- <var> tag
4219: sub start_var {
4220: my ($target,$token) = @_;
4221: my $currentstring = '';
4222: if ($target eq 'web' || $target eq 'webgrade') {
4223: $currentstring = $token->[4];
4224: } elsif ($target eq 'tex') {
4225: $currentstring = '\textit{';
4226: }
4227: return $currentstring;
4228: }
4229:
4230: sub end_var {
4231: my ($target,$token) = @_;
4232: my $currentstring = '';
4233: if ($target eq 'web' || $target eq 'webgrade') {
4234: $currentstring = $token->[2];
4235: } elsif ($target eq 'tex') {
4236: $currentstring = '}';
4237: }
4238: return $currentstring;
4239: }
4240:
4241: #-- <wbr> tag (end tag forbidden)
4242: sub start_wbr {
4243: my ($target,$token) = @_;
4244: my $currentstring = '';
4245: if ($target eq 'web' || $target eq 'webgrade') {
4246: $currentstring = $token->[4];
4247: }
4248: return $currentstring;
4249: }
4250:
4251: sub end_wbr {
4252: my ($target,$token) = @_;
4253: my $currentstring = '';
4254: if ($target eq 'web' || $target eq 'webgrade') {
4255: $currentstring = $token->[2];
4256: }
4257: return $currentstring;
4258: }
4259:
4260: #-- <hideweboutput> tag
4261: sub start_hideweboutput {
4262: my ($target,$token) = @_;
4263: if ($target eq 'web' || $target eq 'webgrade') {
4264: &Apache::lonxml::startredirection();
4265: }
4266: return '';
4267: }
4268:
4269: sub end_hideweboutput {
4270: my ($target,$token) = @_;
4271: my $currentstring = '';
4272: if ($target eq 'web' || $target eq 'webgrade') {
4273: $currentstring = &Apache::lonxml::endredirection();
4274: }
4275: return '';
4276: }
4277:
4278:
4279: sub image_replication {
4280: my $src = shift;
4281: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4282: #replicates eps or ps
4283: my $epssrc = my $pssrc = $src;
4284: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4285: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4286: if (not -e $epssrc && not -e $pssrc) {
4287: my $result=&Apache::lonnet::repcopy($epssrc);
4288: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4289: }
4290: return '';
4291: }
4292: #
4293: # Get correct sizing parameter for an image given
4294: # it's initial ht. and wid. This allows sizing of
4295: # images that are generated on-the-fly (e.g. gnuplot)
4296: # as well as serving as a utility for image_size.
4297: #
4298: # Parameter:
4299: # height_param
4300: # width_param - Initial picture dimensions.
4301: # scaling - A scale factor.
4302: # parstack, - the current stack of tag attributes
4303: # from the xml parser
4304: # safeeval, - pointer to the safespace
4305: # depth, - from what level in the stack to look for attributes
4306: # (assumes -1 if unspecified)
4307: # cis - look for attrubutes case insensitively
4308: # (assumes false)
4309: #
4310: # Returns:
4311: # height, width - new dimensions.
4312: #
4313: sub resize_image {
4314: my ($height_param, $width_param, $scaling,
4315: $parstack, $safeeval, $depth, $cis) = @_;
4316:
4317: # First apply the scaling...
4318:
4319: $height_param = $height_param * $scaling;
4320: $width_param = $width_param * $scaling;
4321:
4322: #do we have any specified LaTeX size of the picture?
4323: my $toget='TeXwidth';
4324: if ($cis) {
4325: $toget=lc($toget);
4326: }
4327: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4328: $safeeval,$depth,$cis);
4329: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4330: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4331: $safeeval,$depth,$cis);
4332: #do we have any specified web size of the picture?
4333: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4334: $depth,1);
4335: if ($TeXwidth) {
4336: my $old_width_param=$width_param;
4337: if ($TeXwidth=~/(\d+)\s*\%/) {
4338: $width_param = $1*$env{'form.textwidth'}/100;
4339: } else {
4340: $width_param = $TeXwidth;
4341: }
4342: if ($TeXheight) {
4343: $height_param = $TeXheight;
4344: } elsif ($old_width_param) {
4345: $height_param=$TeXwidth/$old_width_param*$height_param;
4346: }
4347: } elsif ($TeXheight) {
4348: $height_param = $TeXheight;
4349: if ($height_param) {
4350: $width_param = $TeXheight/$height_param*$width_param;
4351: }
4352: } elsif ($width) {
4353: my $old_width_param=$width_param;
4354: $width_param = $width*$scaling;
4355: if ($old_width_param) {
4356: $height_param=$width_param/$old_width_param*$height_param;
4357: }
4358: }
4359: if ($width_param > $env{'form.textwidth'}) {
4360: my $old_width_param=$width_param;
4361: $width_param =0.95*$env{'form.textwidth'};
4362: if ($old_width_param) {
4363: $height_param=$width_param/$old_width_param*$height_param;
4364: }
4365: }
4366:
4367: return ($height_param, $width_param);
4368: }
4369:
4370: sub image_size {
4371: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4372:
4373: #size of image from gif/jpg/jpeg/png
4374: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4375: if (-e $ressrc) {
4376: $src = $ressrc;
4377: }
4378: my $image = Image::Magick->new;
4379: my $current_figure = $image->Read($src);
4380: my $width_param = $image->Get('width');
4381: my $height_param = $image->Get('height');
4382: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4383: undef($image);
4384:
4385: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4386: $scaling, $parstack, $safeeval,
4387: $depth, $cis);
4388:
4389: return ($height_param, $width_param);
4390: }
4391:
4392: sub image_width {
4393: my ($height, $width) = &image_size(@_);
4394: return $width;
4395: }
4396: # Not yet 100% sure this is correct in all circumstances..
4397: # due to my uncertainty about mods to image_size.
4398: #
4399: sub image_height {
4400: my ($height, $width) = &image_size(@_);
4401: return $height;
4402: }
4403:
4404: sub get_eps_image {
4405: my ($src)=@_;
4406: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4407:
4408: # In order to prevent the substitution of the alt text, we need to
4409: # be sure the orig_src file is on system now so:
4410:
4411: if (! -e $orig_src) {
4412: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4413: }
4414: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4415: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4416: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4417: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4418: &Apache::lonxml::debug("Filelocation gives: $src");
4419: if (! -e $src) {
4420: &Apache::lonxml::debug("$src does not exist");
4421: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4422: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4423: #if replication failed try to find ps file
4424: $src=~s/\.eps$/\.ps/;
4425: &Apache::lonxml::debug("Now looking for $src");
4426: #if no ps file try to replicate it.
4427: my $didrepcopy = &Apache::lonnet::repcopy($src);
4428: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4429: if ( (not -e $src) ||
4430: ($didrepcopy ne 'ok')) {
4431: &Apache::lonxml::debug("Failed to find or replicate $src");
4432:
4433: #if replication failed try to produce eps file dynamically
4434: $src=~s/\.ps$/\.eps/;
4435: my $temp_file;
4436: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4437: my $newsrc=$orig_src;
4438: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4439: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4440: print FILE ("$newsrc\n");
4441: close(FILE);
4442: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4443: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4444: if ($sext ne "") { # Put the ext. back in to uniquify.
4445: $src =~ s/\.eps$/$sext.eps/;
4446: }
4447:
4448: }
4449:
4450: }
4451: } else {
4452: # If the postscript file has spaces in its name,
4453: # LaTeX will gratuitiously vomit. Therefore
4454: # queue such files for copy with " " replaced by "_".
4455: # printout.pm will know them by their .ps or .eps extensions.
4456: my $newsrc = $orig_src;
4457: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4458: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4459: print FILE "$src\n";
4460: close FILE;
4461: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4462: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4463: }
4464: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4465: $path =~ s/ /\_/g;
4466: $file =~ s/ /\_/g;
4467: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4468: return ($path.'/',$file);
4469: }
4470:
4471: sub eps_generation {
4472: my ($src,$file,$width_param) = @_;
4473: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4474: my $temp_file = Apache::File->new('>>'.$filename);
4475: print $temp_file "$src\n";
4476: my $newsrc = $src;
4477: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4478: $newsrc=~s{/home/httpd/html/res}{};
4479: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4480: $newsrc=~s{/\./}{/};
4481: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4482: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4483: $newsrc=~s{/home/httpd/lonUsers}{};
4484: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4485: }
4486: if ($newsrc=~m{/userfiles/}) {
4487: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4488: } else {
4489: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4490: }
4491: }
4492:
4493: sub file_path {
4494: my $src=shift;
4495: my ($file,$path);
4496: if ($src =~ m!(.*)/([^/]*)$!) {
4497: $file = $2;
4498: $path = $1.'/';
4499: }
4500: return $file,$path;
4501: }
4502: # Converts a measurement in to mm from any of
4503: # the other valid LaTeX units of measure.
4504: # If the units of measure are missing from the
4505: # parameter, it is assumed to be in and returned
4506: # with mm units of measure
4507: sub recalc {
4508: my $argument = shift;
4509: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4510: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4511: my $value=$1;
4512: my $units=$2;
4513: if ($units eq 'cm') {
4514: $value*=10;
4515: } elsif ($units eq 'in') {
4516: $value*=25.4;
4517: } elsif ($units eq 'pc') {
4518: $value*=(25.4*12/72.27);
4519: } elsif ($units eq 'pt') {
4520: $value*=(25.4/72.27);
4521: }
4522: return $value.' mm';
4523: }
4524:
4525: sub LATEX_length {
4526: my $garbage=shift;
4527: $garbage=~s/^\s+$//;
4528: $garbage=~s/^\s+(\S.*)/$1/;#space before
4529: $garbage=~s/(.*\S)\s+$/$1/;#space after
4530: $garbage=~s/(\s)+/$1/;#only one space
4531: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4532: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4533: $garbage=~s/([^\\])\$/$1/g;#$
4534: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4535: $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;
4536: $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;
4537: $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;
4538: $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;
4539: $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;
4540: $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;
4541: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4542: #remove some other LaTeX command
4543: $garbage=~s|\\(\w+)\\|\\|g;
4544: $garbage=~s|\\(\w+)(\s*)|$2|g;
4545: $garbage=~s|\+|11|g;
4546: my $value=length($garbage);
4547: return $value;
4548: }
4549:
4550: # Wrap image 'stuff' inside of the LaTeX required to implement
4551: # alignment:
4552: # align_tex_image(align, latex_rendering, image)
4553: # Where:
4554: # align - The HTML alignment specification.
4555: # latex_rendering - rendering hint for latex.
4556: # image - The LaTeX needed to insert the image itsef.
4557: # width,height - dimensions of the image.
4558: # Returns:
4559: # The 1/2 wrapped image and the stuff required to close the
4560: # wrappage. This allows e.g. randomlabel to insert more stuff
4561: # into the closure.
4562: #
4563: sub align_latex_image {
4564: my ($align, $latex_rendering, $image, $width, $height) = @_;
4565: my $currentstring; # The 1/2 wrapped image.
4566: my $closure; # The closure of the wrappage.
4567:
4568: # if it's none just return it back
4569: if ($latex_rendering eq 'none') {
4570: return ($image,'');
4571: }
4572:
4573: # If there's an alignment specification we need to honor it here.
4574: # For the horizontal alignments, we will also honor the
4575: # value of the latex specfication. The default is parbox,
4576: # and that's used for illegal values too.
4577: #
4578: # Even though we set a default alignment value, the user
4579: # could have given us an illegal value. In that case we
4580: # just use the default alignment of bottom..
4581: $currentstring = "\n% figurewrapping \n";
4582: if ($align eq "top") {
4583: $currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
4584: $closure = '}';
4585: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4586: my $offset = $height/2;
4587: $currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
4588: $closure = '}';
4589: } elsif ($align eq "left") {
4590: if ($latex_rendering eq "parpic") {
4591: $currentstring .= '\parpic[l]{'.$image;
4592: $closure = '}';
4593: } elsif ($latex_rendering eq "parbox") {
4594: $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
4595: .$image;
4596: $closure = '\end{minipage}';
4597: } elsif ($latex_rendering eq "wrapfigure"
4598: || $latex_rendering ne 'none') { # wrapfig render
4599: $currentstring .=
4600: '\begin{wrapfigure}{l}{'.$width.'mm}'
4601: .'\scalebox{1.0}{'.$image;
4602: $closure = '}\end{wrapfigure}';
4603: }
4604: } elsif ($align eq "right") {
4605: if ($latex_rendering eq "parpic") {
4606: $currentstring .= '\parpic[r]{'.$image;
4607: $closure = '}';
4608: } elsif ($latex_rendering eq "parbox") {
4609: $currentstring .= '\begin{minipage}[r]{'.$width.'mm}'
4610: .$image;
4611: $closure = '\end{minipage}';
4612: } elsif ($latex_rendering eq "wrapfigure"
4613: || $latex_rendering ne 'none') { # wrapfig render
4614: $currentstring .=
4615: '\begin{wrapfigure}{r}{'.$width.'mm}'
4616: .'\scalebox{1.0}{'.$image;
4617: $closure = '}\end{wrapfigure}';
4618: }
4619: } else { # Bottom is also default.
4620: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4621: $currentstring .= "{$image";
4622: $closure = '}';
4623: }
4624: $currentstring .= "\n% end wrappage\n";
4625: $closure = "\n% Begin closure\n".$closure."\n% End closure\n";
4626: return ($currentstring, $closure);
4627: }
4628:
4629: # is_inside_of $tagstack $tag
4630: # This sub returns true if the current state of Xml processing
4631: # is inside of the tag.
4632: # Parameters:
4633: # tagstack - The tagstack from the parser.
4634: # tag - The tag (without the <>'s.).
4635: # Sample usage:
4636: # if (is_inside_of($tagstack "table")) {
4637: # # I'm in a table....
4638: # }
4639: sub is_inside_of {
4640: my ($tagstack, $tag) = @_;
4641: my @stack = @$tagstack;
4642: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4643: if ($stack[$i] eq $tag) {
4644: return 1;
4645: }
4646: }
4647: return 0;
4648: }
4649:
4650:
4651: 1;
4652: __END__
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