1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.396.2.2 2009/04/11 01:12:58 raeburn Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::lonlocal;
50: use Apache::Constants qw(:common);
51: use File::Basename;
52: use LONCAPA();
53: # use Data::Dumper;
54:
55: BEGIN {
56:
57: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
58:
59: }
60:
61: #
62: # Dumps all elements of the table structure.
63: # Need this 'cause evidently when given an array, Data::Dumper only seems
64: # to dump element 0.
65: #
66: #sub debug_dump_table {
67: # my $lastrow = $#Apache::londefdef::table;
68: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
69: # my $row;
70: # for ($row =0; $row <= $lastrow; $row++ ) {
71: # my $text = Dumper($Apache::londefdef::table[$row]);
72: # &Apache::lonnet::logthis("table [ $row ]".$text);
73: # }
74: #}
75: sub initialize_londefdef {
76: $Apache::londefdef::TD_redirection=0;
77: @Apache::londefdef::table = ();
78: $Apache::londefdef::select=0;
79: undef(@Apache::londefdef::description);
80: @Apache::londefdef::DD=(0);
81: @Apache::londefdef::DT=(0);
82: @Apache::londefdef::seenDT=(0);
83: $Apache::londefdef::list_index=0;
84: undef($Apache::londefdef::head);
85: undef($Apache::londefdef::title);
86: }
87:
88: #======================= TAG SUBROUTINES =====================
89: #-- <output>
90: sub start_output {
91: my ($target) = @_;
92: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
93: return '';
94: }
95: sub end_output {
96: my ($target) = @_;
97: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
98: return '';
99: }
100: #-- <m> tag
101: sub start_m {
102: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
103: my $currentstring = '';
104: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
105: if ($target eq 'web' || $target eq 'analyze') {
106: &Apache::lonxml::debug("M is starting with:$inside:");
107: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
108: if ($eval eq 'on') {
109: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
110: #&Apache::lonxml::debug("M is evaluated to:$inside:");
111: }
112: my $tex = $inside;
113: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
114: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
115: if ($Apache::lontexconvert::errorstring) {
116: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occurred while attempting to convert this TeX: <pre>';
117: $tex = &HTML::Entities::encode($tex,'<>&"');
118: my ($linenumber) =
119: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
120: if (defined($linenumber)) {
121: my @tex=split("\n",$tex);
122: $tex[$linenumber]='<b><font color="red">'.
123: $tex[$linenumber].'</font></b>';
124: $tex=join("\n",@tex);
125: }
126: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
127: $Apache::lontexconvert::errorstring='';
128: }
129: #&Apache::lonxml::debug("M is ends with:$currentstring:");
130: $Apache::lonxml::post_evaluate=0;
131: } elsif ($target eq 'tex') {
132:
133: $currentstring = $inside;
134: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
135: if ($eval eq 'on') {
136: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
137: }
138: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
139: # detect simple math mode entry exits, and convert them
140: # to use \ensuremath ... unless there's a \verb inside.
141: if (! ($currentstring=~/\\verb/)) {
142: if ($currentstring=~/^\s*\$[^\$].*\$\s*$/) {
143: $currentstring=~s/^(\s*)\$/$1/;
144: $currentstring=~s/\$(\s*)$/$1/;
145: $currentstring='\ensuremath{'.$currentstring.'}';
146: }
147: }
148: $Apache::lonxml::post_evaluate=0;
149: }
150: return $currentstring;
151: }
152:
153: sub end_m {
154: my ($target,$token) = @_;
155: my $currentstring = '';
156: if ($target eq 'tex') {
157: $currentstring = "";
158: }
159: return $currentstring;
160: }
161:
162: sub start_tthoption {
163: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
164: my $result;
165: if ($target eq 'web' || $target eq 'webgrade') {
166: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
167: $style);
168: $inside=~s/^\s*//;
169: if ($env{'browser.mathml'}) {
170: &tth::ttmoptions($inside);
171: } else {
172: &tth::tthoptions($inside);
173: }
174: }
175: return $result;
176: }
177:
178: sub end_tthoption {
179: my ($target,$token) = @_;
180: my $result;
181: return $result;
182: }
183:
184: #-- <html> tag (end tag optional)
185: sub start_html {
186: my ($target,$token) = @_;
187: my $currentstring = '';
188: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
189: # start_body() takes care of emitting the <html>
190: } elsif ($target eq 'tex') {
191: $currentstring .=
192: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
193: if (($env{'form.latex_type'}=~'batchmode') ||
194: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
195: $currentstring .= '\newcommand{\keephidden}[1]{}'.
196: '\renewcommand{\deg}{$^{\circ}$}'.
197: '\usepackage{multirow}'.
198: '\usepackage{longtable}'.
199: '\usepackage{textcomp}'.
200: '\usepackage{makeidx}'.
201: '\usepackage[dvips]{graphicx}'.
202: '\usepackage{wrapfig}'.
203: '\usepackage{picins}'.
204: '\usepackage[T1]{fontenc}'."\n".
205: '\usepackage{lmodern}'."\n".
206: '\usepackage[postscript]{ucs}'."\n".
207: '\usepackage[utf8x]{inputenc}'."\n".
208: '\usepackage{pifont}' ."\n".
209: '\usepackage{latexsym}'."\n".
210: '\usepackage{epsfig}'.
211: '\usepackage{calc}'.
212: '\usepackage{amsmath}'.
213: '\usepackage{amssymb}'.
214: '\usepackage{amsfonts}'.
215: '\usepackage{amsthm}';
216:
217: $currentstring .= '\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}}'.
218: '\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}}';
219: }
220: return $currentstring;
221: }
222:
223: sub end_html {
224: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
225: my $currentstring = '';
226: if ($target eq 'web' || $target eq 'webgrade') {
227: # end_body takes care of the </html>
228: }
229: return $currentstring;
230: }
231:
232: #-- <head> tag (end tag optional)
233: sub start_head {
234: my ($target,$token) = @_;
235: my $currentstring = '';
236: if ($target eq 'web' || $target eq 'webgrade') {
237: &Apache::lonxml::startredirection();
238: }
239: return $currentstring;
240: }
241:
242: sub end_head {
243: my ($target,$token) = @_;
244: my $currentstring = '';
245: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
246: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
247: # in case there is a </head> but no <head>
248: if ($Apache::lonxml::redirection) {
249: $Apache::londefdef::head = &Apache::lonxml::endredirection();
250: }
251: }
252: return $currentstring;
253: }
254:
255: #-- <map> tag (end tag required)
256: sub start_map {
257: my ($target,$token) = @_;
258: my $currentstring = '';
259: if ($target eq 'web' || $target eq 'webgrade') {
260: $currentstring = $token->[4];
261: }
262: return $currentstring;
263: }
264:
265: sub end_map {
266: my ($target,$token) = @_;
267: my $currentstring = '';
268: if ($target eq 'web' || $target eq 'webgrade') {
269: $currentstring = $token->[2];
270: }
271: return $currentstring;
272: }
273:
274: #-- <select> tag (end tag required)
275: sub start_select {
276: my ($target,$token) = @_;
277: my $currentstring = '';
278: if ($target eq 'web' || $target eq 'webgrade') {
279: $currentstring = $token->[4];
280: } elsif ($target eq 'tex') {
281: $Apache::londefdef::select=0;
282: }
283: return $currentstring;
284: }
285:
286: sub end_select {
287: my ($target,$token) = @_;
288: my $currentstring = '';
289: if ($target eq 'web' || $target eq 'webgrade') {
290: $currentstring = $token->[2];
291: }
292: return $currentstring;
293: }
294:
295: #-- <option> tag (end tag optional)
296: sub start_option {
297: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
298: my $currentstring = '';
299: if ($target eq 'web' || $target eq 'webgrade') {
300: $currentstring = $token->[4];
301: } elsif ($target eq 'tex') {
302: $Apache::londefdef::select++;
303: if ($Apache::londefdef::select == 1) {
304: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
305: } else {
306: $currentstring='\keephidden{';
307: }
308: }
309: return $currentstring;
310: }
311:
312: sub end_option {
313: my ($target,$token) = @_;
314: my $currentstring = '';
315: if ($target eq 'web' || $target eq 'webgrade') {
316: $currentstring = $token->[2];
317: } elsif ($target eq 'tex') {
318: $currentstring='}';
319: }
320: return $currentstring;
321: }
322:
323: #-- <input> tag (end tag forbidden)
324: sub start_input {
325: my ($target,$token) = @_;
326: my $currentstring = '';
327: if ($target eq 'web' || $target eq 'webgrade') {
328: $currentstring = $token->[4];
329: }
330: return $currentstring;
331: }
332:
333: sub end_input {
334: my ($target,$token) = @_;
335: my $currentstring = '';
336: if ($target eq 'web' || $target eq 'webgrade') {
337: $currentstring = $token->[2];
338: }
339: return $currentstring;
340: }
341:
342: #-- <textarea> tag (end tag required)
343: sub start_textarea {
344: my ($target,$token) = @_;
345: my $currentstring = '';
346: if ($target eq 'web' || $target eq 'webgrade') {
347: $currentstring = $token->[4];
348: }
349: return $currentstring;
350: }
351:
352: sub end_textarea {
353: my ($target,$token) = @_;
354: my $currentstring = '';
355: if ($target eq 'web' || $target eq 'webgrade') {
356: $currentstring = $token->[2];
357: }
358: return $currentstring;
359: }
360:
361: #-- <form> tag (end tag required)
362: sub start_form {
363: my ($target,$token) = @_;
364: my $currentstring = '';
365: if ($target eq 'web' || $target eq 'webgrade') {
366: $currentstring = $token->[4];
367: }
368: return $currentstring;
369: }
370:
371: sub end_form {
372: my ($target,$token) = @_;
373: my $currentstring = '';
374: if ($target eq 'web' || $target eq 'webgrade') {
375: $currentstring = $token->[2];
376: }
377: return $currentstring;
378: }
379:
380: #-- <title> tag (end tag required)
381: sub start_title {
382: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
383: my $currentstring = '';
384: if ($target eq 'web' || $target eq 'webgrade') {
385: $Apache::londefdef::title =
386: &Apache::lonxml::get_all_text('/title',$parser,$style);
387: } elsif ($target eq 'tex') {
388: $currentstring .= '\keephidden{Title of the document: '
389: }
390: if ($target eq 'meta') {
391: $currentstring='<title>';
392: &start_output($target);
393: }
394: return $currentstring;
395: }
396:
397: sub end_title {
398: my ($target,$token) = @_;
399: my $currentstring = '';
400: if ($target eq 'web' || $target eq 'webgrade') {
401: # start_title takes care of swallowing the title
402: } elsif ($target eq 'tex') {
403: $currentstring .= '}';
404: }
405: if ($target eq 'meta') {
406: &end_output($target);
407: $currentstring='</title>';
408: }
409: return $currentstring;
410: }
411:
412: #-- <meta> tag (end tag forbidden)
413: sub start_meta {
414: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
415: my $currentstring = '';
416: if ($target eq 'web' || $target eq 'webgrade') {
417: my $args='';
418: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
419: if ($args eq '') {
420: &Apache::lonxml::get_all_text("/meta",$parser,$style);
421: } else {
422: $currentstring = $token->[4];
423: }
424: } elsif ($target eq 'meta') {
425: unless (&Apache::lonxml::get_param
426: ('http-equiv',$parstack,$safeeval,undef,1)) {
427: my $name=$token->[2]->{'name'};
428: $name=~tr/A-Z/a-z/;
429: $name=~s/\s/\_/gs;
430: $name=~s/\W//gs;
431: if ($name) {
432: $currentstring='<'.$name;
433: my $display=&Apache::lonxml::get_param
434: ('display',$parstack,$safeeval,undef,1);
435: if ($display) {
436: $display=~s/\"/\'/g;
437: $currentstring.=' display="'.$display.'"';
438: }
439: $currentstring.='>'.
440: &Apache::lonxml::get_param
441: ('content',$parstack,$safeeval,undef,1).
442: '</'.$name.'>';
443: }
444: my $display=&Apache::lonxml::get_param
445: ('display',$parstack,$safeeval,undef,1);
446: if ($display) {
447: $display=&HTML::Entities::encode($display,'<>&"');
448: $currentstring.='<'.$name.'.display>'.$display.
449: '</'.$name.'.display>';
450: }
451: }
452: } elsif ($target eq 'tex') {
453: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
454: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
455: if ((not defined $content) && (not defined $name)) {
456: &Apache::lonxml::startredirection();
457: }
458: } elsif ($target eq 'edit') {
459: $currentstring .= &Apache::edit::tag_start($target,$token);
460: $currentstring .= &Apache::edit::text_arg('Name:','name',$token,30);
461: $currentstring .= &Apache::edit::text_arg('Content:','content',$token,70);
462: $currentstring .= &Apache::edit::end_row();
463: } elsif ($target eq 'modified') {
464: my $constructtag =
465: &Apache::edit::get_new_args($token,$parstack,$safeeval,
466: 'name','content');
467: if ($constructtag) { $currentstring = &Apache::edit::rebuild_tag($token); }
468: }
469: return $currentstring;
470: }
471:
472: sub end_meta {
473: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
474: my $currentstring = '';
475: if ($target eq 'web' || $target eq 'webgrade') {
476: my $args='';
477: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
478: if ($args ne '') {
479: $currentstring = $token->[4];
480: }
481: } elsif ($target eq 'tex') {
482: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
483: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
484: if ((not defined $content) && (not defined $name)) {
485: &Apache::lonxml::endredirection();
486: }
487: }
488: return $currentstring;
489: }
490:
491: sub insert_meta {
492: return '
493: <meta />';
494: }
495:
496: # accessrule
497: sub start_accessrule {
498: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
499: my $currentstring = '';
500: my $eff =&Apache::lonxml::get_param('effect',$parstack,$safeeval,undef,1);
501: my $realm=&Apache::lonxml::get_param('realm', $parstack,$safeeval,undef,1);
502: my $role =&Apache::lonxml::get_param('role', $parstack,$safeeval,undef,1);
503: my $type =&Apache::lonxml::get_param('type', $parstack,$safeeval,undef,1);
504:
505: my ($dom,$crs,$sec,$separator);
506: if ($type eq 'user') {
507: ($dom,$crs,$sec)=split(m{/},$realm);
508: $crs = &LONCAPA::clean_username($crs);
509: $separator = '/';
510: } else {
511: ($dom,$crs,$sec)=split(/\_/,$realm);
512: $crs = &LONCAPA::clean_courseid($crs);
513: $separator = '_';
514: }
515: $dom = &LONCAPA::clean_domain($dom);
516:
517: $sec =~s/\W//;
518: $realm = $dom;
519: if ($crs =~ /\S/) { $realm .= $separator.$crs; }
520: if ($sec =~ /\S/) { $realm .= $separator.$sec; }
521: $role=~s/\W//g;
522:
523: if ($target eq 'web') {
524: my $args='';
525: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
526: if ($args eq '') {
527: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
528: } else {
529: $currentstring = $token->[4];
530: }
531: }
532: if ($target eq 'meta') {
533: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
534: }
535: return $currentstring;
536: }
537:
538: sub end_accessrule {
539: my ($target,$token,$tagstack,$parstack,$parser) = @_;
540: my $currentstring = '';
541: if ($target eq 'web') {
542: my $args='';
543: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
544: if ($args ne '') {
545: $currentstring = $token->[4];
546: }
547: }
548: return $currentstring;
549: }
550:
551: sub generate_css_links {
552: my $links;
553: my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
554: if ($css_href =~ /\S/) {
555: &Apache::lonxml::extlink($css_href);
556: $links .=
557: '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
558: }
559: return $links;
560: }
561:
562: #-- <body> tag (end tag required)
563: sub start_body {
564: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
565: my $currentstring = '';
566:
567: if ($target eq 'web' || $target eq 'webgrade') {
568: if ($Apache::lonhomework::parsing_a_problem) {
569: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
570: return '';
571: }
572:
573: if (&is_inside_of($tagstack, "head")) {
574: &end_head(@_);
575: }
576:
577: my $extra_head = &generate_css_links();
578:
579: $currentstring =
580: &Apache::loncommon::start_page($Apache::londefdef::title,
581: $Apache::londefdef::head
582: .$extra_head,
583: {'add_entries' => $token->[2],
584: 'no_title' => 1,
585: 'force_register' => 1});
586:
587: if ($env{'request.state'} ne 'published') {
588: $currentstring.=&Apache::lonmenu::constspaceform();
589: $currentstring.=&Apache::londefdef::edit_controls();
590: }
591: $currentstring.=&Apache::lonxml::message_location();
592: } elsif ($target eq 'tex') {
593: $currentstring = '\begin{document}';
594: }
595: return $currentstring;
596: }
597:
598: sub edit_controls {
599: my $result .= '
600: <form method="post">
601: <div class="LC_edit_problem_header">
602: <div class="LC_edit_problem_header_row1">'.
603: &Apache::lonxml::renderingoptions().'
604: <input type="submit" name="changeproblemmode" value="'.&mt('Change View').'" />
605: </div>
606: <div class="LC_edit_problem_header_edit_row"><input type="submit" name="editmode" accesskey="e" value="'.&mt('Edit').'" /></div></div>
607: </form>
608: <br />';
609: return $result;
610: }
611:
612: sub end_body {
613: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
614: my $currentstring = &end_p(); # Close off unclosed <p>
615: if ($target eq 'web' || $target eq 'webgrade') {
616: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
617: } elsif ($target eq 'tex') {
618: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
619: }
620: return $currentstring;
621: }
622:
623: # \begin{center} causes a new paragprah spacing that looks odd inside
624: # of a table cell. Same at the end of a \center but with a slightly
625: # larger space .. hence center_correction and center_end_correction.
626: #
627: sub center_correction { return '\vspace*{-6 mm}'; }
628: sub center_end_correction { return '\vspace*{-7 mm}'; }
629:
630: #-- <center> tag (end tag required)
631: sub start_center {
632: my ($target,$token,$tagstack) = @_;
633: my $currentstring = &end_p(); # Close off any prior para.
634: if ($target eq 'web' || $target eq 'webgrade') {
635: $currentstring .= $token->[4];
636: } elsif ($target eq 'tex') {
637: if (&is_inside_of($tagstack, "table")) {
638: $currentstring .= ¢er_correction();
639: }
640: $currentstring .= '\begin{center}';
641: }
642: return $currentstring;
643: }
644:
645: sub end_center {
646: my ($target,$token,$tagstack) = @_;
647: my $currentstring = '';
648: if ($target eq 'web' || $target eq 'webgrade') {
649: $currentstring = $token->[2];
650: } elsif ($target eq 'tex') {
651: $currentstring = '\end{center}';
652: if (&is_inside_of($tagstack, "table")) {
653: $currentstring .= ¢er_end_correction();
654: }
655: }
656: return $currentstring;
657: }
658:
659: #-- <b> tag (end tag required)
660: # NOTE: In TeX mode disables internal <p>
661: sub start_b {
662: my ($target,$token) = @_;
663: my $currentstring = '';
664: if ($target eq 'web' || $target eq 'webgrade') {
665: $currentstring = $token->[4];
666: } elsif ($target eq 'tex') {
667: &disable_para();
668: $currentstring .= '\textbf{';
669: }
670: return $currentstring;
671: }
672:
673: sub end_b {
674: my ($target,$token) = @_;
675: my $currentstring = '';
676: if ($target eq 'web' || $target eq 'webgrade') {
677: $currentstring = $token->[2];
678: } elsif ($target eq 'tex') {
679: &enable_para();
680: $currentstring = '}';
681: }
682: return $currentstring;
683: }
684:
685: #-- <strong> tag (end tag required)
686: # NOTE: in TeX mode disables internal <p>
687: sub start_strong {
688: my ($target,$token) = @_;
689: my $currentstring = '';
690: if ($target eq 'web' || $target eq 'webgrade') {
691: $currentstring = $token->[4];
692: } elsif ($target eq 'tex') {
693: &disable_para();
694: $currentstring = '\textbf{';
695: }
696: return $currentstring;
697: }
698:
699: sub end_strong {
700: my ($target,$token) = @_;
701: my $currentstring = '';
702: if ($target eq 'web' || $target eq 'webgrade') {
703: $currentstring = $token->[2];
704: } elsif ($target eq 'tex') {
705: &enable_para();
706: $currentstring = '}';
707: }
708: return $currentstring;
709: }
710:
711: #-- <h1> tag (end tag required)
712: sub start_h1 {
713: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
714: my $currentstring = &end_p(); # Close off any prior para.
715: if ($target eq 'web' || $target eq 'webgrade') {
716: $currentstring .= $token->[4];
717: } elsif ($target eq 'tex') {
718: my $pre;
719: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
720: if ($align eq 'center') {
721: $pre='\begin{center}';
722: } elsif ($align eq 'left') {
723: $pre='\rlap{';
724: } elsif ($align eq 'right') {
725: $pre=' \hfill \llap{';
726: }
727: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
728: if (not defined $TeXsize) {$TeXsize="large";}
729: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
730: } elsif ($target eq 'meta') {
731: $currentstring.='<subject>';
732: &start_output($target);
733: }
734: return $currentstring;
735: }
736:
737: sub end_h1 {
738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
739: my $currentstring = '';
740: if ($target eq 'web' || $target eq 'webgrade') {
741: $currentstring .= $token->[2];
742: } elsif ($target eq 'tex') {
743: my $post='\vskip 0 mm ';
744: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
745: if ($align eq 'center') {
746: $post='\end{center}';
747: } elsif ($align eq 'left') {
748: $post='} \hfill'.'\vskip 0 mm ';
749: } elsif ($align eq 'right') {
750: $post='}'.'\vskip 0 mm ';
751: }
752: $currentstring .= '}}'.$post;
753: } elsif ($target eq 'meta') {
754: &end_output($target);
755: $currentstring='</subject>';
756: }
757: return $currentstring;
758: }
759:
760: #-- <h2> tag
761: sub start_h2 {
762: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
763: my $currentstring = &end_p(); # Close off any prior para.
764: if ($target eq 'web' || $target eq 'webgrade') {
765: $currentstring .= $token->[4];
766: } elsif ($target eq 'tex') {
767: my $pre;
768: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
769: if ($align eq 'center') {
770: $pre='\begin{center}';
771: } elsif ($align eq 'left') {
772: $pre='\rlap{';
773: } elsif ($align eq 'right') {
774: $pre=' \hfill \llap{';
775: }
776: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
777: if (not defined $TeXsize) {$TeXsize="large";}
778: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
779: }
780: return $currentstring;
781: }
782:
783: sub end_h2 {
784: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
785: my $currentstring = '';
786: if ($target eq 'web' || $target eq 'webgrade') {
787: $currentstring .= $token->[2];
788: } elsif ($target eq 'tex') {
789: my $post='\vskip 0 mm ';
790: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
791: if ($align eq 'center') {
792: $post='\end{center}';
793: } elsif ($align eq 'left') {
794: $post='} \hfill'.'\vskip 0 mm ';
795: } elsif ($align eq 'right') {
796: $post='}'.'\vskip 0 mm ';
797: }
798: $currentstring .= '}}'.$post;
799: }
800: return $currentstring;
801: }
802:
803: #-- <h3> tag
804: sub start_h3 {
805: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
806: my $currentstring = &end_p(); # Close off any prior para.
807: if ($target eq 'web' || $target eq 'webgrade') {
808: $currentstring .= $token->[4];
809: } elsif ($target eq 'tex') {
810: my $pre;
811: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
812: if ($align eq 'center') {
813: $pre='\begin{center}';
814: } elsif ($align eq 'left') {
815: $pre='\rlap{';
816: } elsif ($align eq 'right') {
817: $pre=' \hfill \llap{';
818: }
819: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
820: if (not defined $TeXsize) {$TeXsize="large";}
821: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
822: }
823: return $currentstring;
824: }
825:
826: sub end_h3 {
827: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
828: my $currentstring = '';
829: if ($target eq 'web' || $target eq 'webgrade') {
830: $currentstring .= $token->[2];
831: } elsif ($target eq 'tex') {
832: my $post='\vskip 0 mm ';
833: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
834: if ($align eq 'center') {
835: $post='\end{center}';
836: } elsif ($align eq 'left') {
837: $post='} \hfill'.'\vskip 0 mm ';
838: } elsif ($align eq 'right') {
839: $post='}'.'\vskip 0 mm ';
840: }
841: $currentstring .= '}}'.$post;
842: }
843: return $currentstring;
844: }
845:
846: #-- <h4> tag
847: sub start_h4 {
848: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
849: my $currentstring = &end_p(); # Close off any prior para.
850: if ($target eq 'web' || $target eq 'webgrade') {
851: $currentstring .= $token->[4];
852: } elsif ($target eq 'tex') {
853: my $pre;
854: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
855: if ($align eq 'center') {
856: $pre='\begin{center}';
857: } elsif ($align eq 'left') {
858: $pre='\rlap{';
859: } elsif ($align eq 'right') {
860: $pre=' \hfill \llap{';
861: }
862: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
863: if (not defined $TeXsize) {$TeXsize="large";}
864: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
865: }
866: return $currentstring;
867: }
868:
869: sub end_h4 {
870: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
871: my $currentstring = '';
872: if ($target eq 'web' || $target eq 'webgrade') {
873: $currentstring .= $token->[2];
874: } elsif ($target eq 'tex') {
875: my $post='\vskip 0 mm ';
876: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
877: if ($align eq 'center') {
878: $post='\end{center}';
879: } elsif ($align eq 'left') {
880: $post='} \hfill'.'\vskip 0 mm ';
881: } elsif ($align eq 'right') {
882: $post='}'.'\vskip 0 mm ';
883: }
884: $currentstring .= '}}'.$post;
885: }
886: return $currentstring;
887: }
888:
889: #-- <h5> tag
890: sub start_h5 {
891: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
892: my $currentstring = &end_p(); # Close off any prior paras.
893: if ($target eq 'web' || $target eq 'webgrade') {
894: $currentstring .= $token->[4];
895: } elsif ($target eq 'tex') {
896: my $pre;
897: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
898: if ($align eq 'center') {
899: $pre='\begin{center}';
900: } elsif ($align eq 'left') {
901: $pre='\rlap{';
902: } elsif ($align eq 'right') {
903: $pre=' \hfill \llap{';
904: }
905: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
906: if (not defined $TeXsize) {$TeXsize="large";}
907: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
908: }
909: return $currentstring;
910: }
911:
912: sub end_h5 {
913: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
914: my $currentstring = '';
915: if ($target eq 'web' || $target eq 'webgrade') {
916: $currentstring .= $token->[2];
917: } elsif ($target eq 'tex') {
918: my $post='\vskip 0 mm ';
919: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
920: if ($align eq 'center') {
921: $post='\end{center}';
922: } elsif ($align eq 'left') {
923: $post='} \hfill'.'\vskip 0 mm ';
924: } elsif ($align eq 'right') {
925: $post='}'.'\vskip 0 mm ';
926: }
927: $currentstring .= '}}'.$post;
928: }
929: return $currentstring;
930: }
931:
932: #-- <h6> tag
933: sub start_h6 {
934: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
935: my $currentstring = &end_p(); # Close off any prior paras.
936: if ($target eq 'web' || $target eq 'webgrade') {
937: $currentstring .= $token->[4];
938: } elsif ($target eq 'tex') {
939: my $pre;
940: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
941: if ($align eq 'center') {
942: $pre='\begin{center}';
943: } elsif ($align eq 'left') {
944: $pre='\rlap{';
945: } elsif ($align eq 'right') {
946: $pre=' \hfill \llap{';
947: }
948: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
949: if (not defined $TeXsize) {$TeXsize="large";}
950: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
951: }
952: return $currentstring;
953: }
954:
955: sub end_h6 {
956: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
957: my $currentstring = '';
958: if ($target eq 'web' || $target eq 'webgrade') {
959: $currentstring .= $token->[2];
960: } elsif ($target eq 'tex') {
961: my $post='\vskip 0 mm ';
962: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
963: if ($align eq 'center') {
964: $post='\end{center}';
965: } elsif ($align eq 'left') {
966: $post='} \hfill'.'\vskip 0 mm ';
967: } elsif ($align eq 'right') {
968: $post='}'.'\vskip 0 mm ';
969: }
970: $currentstring .= '}}'.$post;
971: }
972: return $currentstring;
973: }
974:
975: #--- <cite> tag (end tag required)
976: sub start_cite {
977: my ($target,$token) = @_;
978: my $currentstring = '';
979: if ($target eq 'web' || $target eq 'webgrade') {
980: $currentstring .= $token->[4];
981: } elsif ($target eq 'tex') {
982: $currentstring .= '\textit{';
983: }
984: return $currentstring;
985: }
986:
987: sub end_cite {
988: my ($target,$token) = @_;
989: my $currentstring = '';
990: if ($target eq 'web' || $target eq 'webgrade') {
991: $currentstring .= $token->[2];
992: } elsif ($target eq 'tex') {
993: $currentstring .= '}';
994: }
995: return $currentstring;
996: }
997:
998: #-- <i> tag (end tag required)
999: sub start_i {
1000: my ($target,$token) = @_;
1001: my $currentstring = '';
1002: if ($target eq 'web' || $target eq 'webgrade') {
1003: $currentstring .= $token->[4];
1004: } elsif ($target eq 'tex') {
1005: $currentstring .= '\textit{';
1006: }
1007: return $currentstring;
1008: }
1009:
1010: sub end_i {
1011: my ($target,$token) = @_;
1012: my $currentstring = '';
1013: if ($target eq 'web' || $target eq 'webgrade') {
1014: $currentstring .= $token->[2];
1015: } elsif ($target eq 'tex') {
1016: $currentstring .= '}';
1017: }
1018: return $currentstring;
1019: }
1020:
1021: #-- <address> tag (end tag required)
1022: sub start_address {
1023: my ($target,$token) = @_;
1024: my $currentstring = '';
1025: if ($target eq 'web' || $target eq 'webgrade') {
1026: $currentstring .= $token->[4];
1027: } elsif ($target eq 'tex') {
1028: $currentstring .= '\textit{';
1029: }
1030: return $currentstring;
1031: }
1032:
1033: sub end_address {
1034: my ($target,$token) = @_;
1035: my $currentstring = '';
1036: if ($target eq 'web' || $target eq 'webgrade') {
1037: $currentstring .= $token->[2];
1038: } elsif ($target eq 'tex') {
1039: $currentstring .= '}';
1040: }
1041: return $currentstring;
1042: }
1043:
1044: #-- <dfn> tag (end tag required)
1045: sub start_dfn {
1046: my ($target,$token) = @_;
1047: my $currentstring = '';
1048: if ($target eq 'web' || $target eq 'webgrade') {
1049: $currentstring .= $token->[4];
1050: } elsif ($target eq 'tex') {
1051: $currentstring .= '\textit{';
1052: }
1053: return $currentstring;
1054: }
1055:
1056: sub end_dfn {
1057: my ($target,$token) = @_;
1058: my $currentstring = '';
1059: if ($target eq 'web' || $target eq 'webgrade') {
1060: $currentstring .= $token->[2];
1061: } elsif ($target eq 'tex') {
1062: $currentstring .= '}';
1063: }
1064: return $currentstring;
1065: }
1066:
1067: #-- <tt> tag (end tag required)
1068: sub start_tt {
1069: my ($target,$token) = @_;
1070: my $currentstring = '';
1071: if ($target eq 'web' || $target eq 'webgrade') {
1072: $currentstring .= $token->[4];
1073: } elsif ($target eq 'tex') {
1074: $currentstring .= '\texttt{';
1075: }
1076: return $currentstring;
1077: }
1078:
1079: sub end_tt {
1080: my ($target,$token) = @_;
1081: my $currentstring = '';
1082: if ($target eq 'web' || $target eq 'webgrade') {
1083: $currentstring .= $token->[2];
1084: } elsif ($target eq 'tex') {
1085: $currentstring .= '}';
1086: }
1087: return $currentstring;
1088: }
1089:
1090: #-- <kbd> tag (end tag required)
1091: sub start_kbd {
1092: my ($target,$token) = @_;
1093: my $currentstring = '';
1094: if ($target eq 'web' || $target eq 'webgrade') {
1095: $currentstring .= $token->[4];
1096: } elsif ($target eq 'tex') {
1097: $currentstring .= '\texttt{';
1098: }
1099: return $currentstring;
1100: }
1101:
1102: sub end_kbd {
1103: my ($target,$token) = @_;
1104: my $currentstring = '';
1105: if ($target eq 'web' || $target eq 'webgrade') {
1106: $currentstring .= $token->[2];
1107: } elsif ($target eq 'tex') {
1108: $currentstring .= '}';
1109: }
1110: return $currentstring;
1111: }
1112:
1113: #-- <code> tag (end tag required)
1114: sub start_code {
1115: my ($target,$token) = @_;
1116: my $currentstring = '';
1117: if ($target eq 'web' || $target eq 'webgrade') {
1118: $currentstring .= $token->[4];
1119: } elsif ($target eq 'tex') {
1120: $currentstring .= '\texttt{';
1121: }
1122: return $currentstring;
1123: }
1124:
1125: sub end_code {
1126: my ($target,$token) = @_;
1127: my $currentstring = '';
1128: if ($target eq 'web' || $target eq 'webgrade') {
1129: $currentstring .= $token->[2];
1130: } elsif ($target eq 'tex') {
1131: $currentstring .= '}';
1132: }
1133: return $currentstring;
1134: }
1135:
1136: #-- <em> tag (end tag required)
1137: sub start_em {
1138: my ($target,$token) = @_;
1139: my $currentstring = '';
1140: if ($target eq 'web' || $target eq 'webgrade') {
1141: $currentstring .= $token->[4];
1142: } elsif ($target eq 'tex') {
1143: $currentstring .= '\emph{';
1144: }
1145: return $currentstring;
1146: }
1147:
1148: sub end_em {
1149: my ($target,$token) = @_;
1150: my $currentstring = '';
1151: if ($target eq 'web' || $target eq 'webgrade') {
1152: $currentstring .= $token->[2];
1153: } elsif ($target eq 'tex') {
1154: $currentstring .= '}';
1155: }
1156: return $currentstring;
1157: }
1158:
1159: #-- <q> tag (end tag required)
1160: sub start_q {
1161: my ($target,$token) = @_;
1162: my $currentstring = '';
1163: if ($target eq 'web' || $target eq 'webgrade') {
1164: $currentstring .= $token->[4];
1165: } elsif ($target eq 'tex') {
1166: $currentstring .= '\emph{';
1167: }
1168: return $currentstring;
1169: }
1170:
1171: sub end_q {
1172: my ($target,$token) = @_;
1173: my $currentstring = '';
1174: if ($target eq 'web' || $target eq 'webgrade') {
1175: $currentstring .= $token->[2];
1176: } elsif ($target eq 'tex') {
1177: $currentstring .= '}';
1178: }
1179: return $currentstring;
1180: }
1181:
1182: # <p> is a bit strange since it does not require a closing </p>
1183: # However in latex, we must often output closing stuff to end
1184: # environments and {}'s etc. Therefore we do all the work
1185: # of figuring out the ending strings in the start tag processing,
1186: # and provide a mechanism to output the stop text external
1187: # to tag processing.
1188: #
1189: {
1190:
1191: my $closing_string = ''; # String required to close <p>
1192:
1193: # Some tags are <p> fragile meaning that <p> inside of them
1194: # does not work within TeX mode. This is managed via the
1195: # counter below:
1196: #
1197:
1198: my $para_disabled = 0;
1199:
1200: sub disable_para {
1201: $para_disabled++;
1202: }
1203: sub enable_para {
1204: $para_disabled--;
1205: }
1206:
1207:
1208: #-- <p> tag (end tag optional)
1209: #optional attribute - align="center|left|right"
1210: sub start_p {
1211: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1212: my $currentstring = '';
1213: if ($target eq 'web' || $target eq 'webgrade') {
1214: $currentstring .= &end_p(); # close off prior para if in progress.
1215: $currentstring .= $token->[4];
1216: if (! ($currentstring =~ /\//)) {
1217: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1218: }
1219: } elsif ($target eq 'tex' && !$para_disabled) {
1220:
1221: $currentstring .= &end_p(); # close off prior para if in progress.
1222: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1223: if ($align eq 'center') {
1224: $currentstring .='\begin{center}\par ';
1225: $closing_string = '\end{center}';
1226: if (&is_inside_of($tagstack, "table")) {
1227: $currentstring = ¢er_correction().$currentstring;
1228: }
1229: } elsif ($align eq 'right') {
1230: $currentstring.="\n".'{\flushright ';
1231: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1232: $closing_string= "}\n";
1233: } elsif ($align eq 'left') {
1234: $currentstring.= "\n".'{\flushleft ';
1235: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1236: $closing_string = "}\n";
1237: } else {
1238: $currentstring.='\par ';
1239: if (&is_inside_of($tagstack, 'table')) {
1240: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1241: } else {
1242: $closing_string = '\strut\\\\\strut ';
1243: }
1244: }
1245:
1246: }
1247: return $currentstring;
1248: }
1249: #
1250: # End paragraph processing just requires that we output the
1251: # closing string that was saved and blank it.
1252: sub end_p {
1253: # Note only 'tex' mode uses disable_para and enable_para
1254: # so we don't need to know the target in the check below:
1255:
1256: if (!$para_disabled) {
1257: my $current_string = $closing_string;
1258: $closing_string = ''; # Not in a para anymore.
1259: return $current_string;
1260: } else {
1261: return '';
1262: }
1263:
1264: }
1265: }
1266: #-- <br> tag (end tag forbidden)
1267: sub start_br {
1268: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1269: my $currentstring = '';
1270: if ($target eq 'web' || $target eq 'webgrade') {
1271: $currentstring .= $token->[4];
1272: } elsif ($target eq 'tex') {
1273: my @tempo=@$tagstack;
1274: my $signal=0;
1275: # Not going to factor this to is_inside_of since that would require
1276: # multiple stack traversals.
1277: #
1278: for (my $i=$#tempo;$i>=0;$i--) {
1279: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1280: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1281: $signal=1;
1282: }
1283: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1284: $signal = 1;
1285: }
1286: }
1287: if ($signal != 1) {
1288: $currentstring .= '\strut \\\\ \strut ';
1289: }
1290:
1291: }
1292: return $currentstring;
1293: }
1294:
1295: sub end_br {
1296: my ($target,$token) = @_;
1297: my $currentstring = '';
1298: if ($target eq 'web' || $target eq 'webgrade') {
1299: $currentstring .= $token->[2];
1300: }
1301: return $currentstring;
1302: }
1303:
1304: #-- <big> tag (end tag required)
1305: sub start_big {
1306: my ($target,$token) = @_;
1307: my $currentstring = '';
1308: if ($target eq 'web' || $target eq 'webgrade') {
1309: $currentstring .= $token->[4];
1310: } elsif ($target eq 'tex') {
1311: $currentstring .= '{\large ';
1312: }
1313: return $currentstring;
1314: }
1315:
1316: sub end_big {
1317: my ($target,$token) = @_;
1318: my $currentstring = '';
1319: if ($target eq 'web' || $target eq 'webgrade') {
1320: $currentstring .= $token->[2];
1321: } elsif ($target eq 'tex') {
1322: $currentstring .= '}';
1323: }
1324: return $currentstring;
1325: }
1326:
1327: #-- <small> tag (end tag required)
1328: sub start_small {
1329: my ($target,$token) = @_;
1330: my $currentstring = '';
1331: if ($target eq 'web' || $target eq 'webgrade') {
1332: $currentstring .= $token->[4];
1333: } elsif ($target eq 'tex') {
1334: $currentstring .= '{\footnotesize ';
1335: }
1336: return $currentstring;
1337: }
1338:
1339: sub end_small {
1340: my ($target,$token) = @_;
1341: my $currentstring = '';
1342: if ($target eq 'web' || $target eq 'webgrade') {
1343: $currentstring .= $token->[2];
1344: } elsif ($target eq 'tex') {
1345: $currentstring .= '}';
1346: }
1347: return $currentstring;
1348: }
1349:
1350: #-- <basefont> tag (end tag forbidden)
1351: sub start_basefont {
1352: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1353: my $currentstring = '';
1354: if ($target eq 'web' || $target eq 'webgrade') {
1355: $currentstring = $token->[4];
1356: } elsif ($target eq 'tex') {
1357: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1358: if (defined $basesize) {
1359: $currentstring = '{\\'.$basesize.' ';
1360: }
1361: }
1362: return $currentstring;
1363: }
1364:
1365: sub end_basefont {
1366: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1367: my $currentstring = '';
1368: if ($target eq 'web' || $target eq 'webgrade') {
1369: $currentstring = $token->[4];
1370: } elsif ($target eq 'tex') {
1371: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1372: if (defined $basesize) {
1373: $currentstring = '}';
1374: }
1375: }
1376: return $currentstring;
1377: }
1378:
1379: #-- <font> tag (end tag required)
1380: sub start_font {
1381: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1382: my $currentstring = '';
1383: if ($target eq 'web' || $target eq 'webgrade') {
1384: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1385: if ($face!~/symbol/i) {
1386: if (($env{'browser.fontenhance'} eq 'on') ||
1387: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1388: }
1389: $currentstring = $token->[4];
1390: } elsif ($target eq 'tex') {
1391: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1392: if (defined $fontsize) {
1393: $currentstring = '{\\'.$fontsize.' ';
1394: }
1395: }
1396: return $currentstring;
1397: }
1398:
1399: sub end_font {
1400: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1401: my $currentstring = '';
1402: if ($target eq 'web' || $target eq 'webgrade') {
1403: $currentstring = $token->[2];
1404: } elsif ($target eq 'tex') {
1405: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1406: if (defined $fontsize) {
1407: $currentstring = '}';
1408: }
1409: }
1410: return $currentstring;
1411: }
1412:
1413: #-- <strike> tag (end tag required)
1414: sub start_strike {
1415: my ($target,$token) = @_;
1416: my $currentstring = '';
1417: if ($target eq 'web' || $target eq 'webgrade') {
1418: $currentstring .= $token->[4];
1419: } elsif ($target eq 'tex') {
1420: &Apache::lonxml::startredirection();
1421: }
1422: return $currentstring;
1423: }
1424:
1425: sub end_strike {
1426: my ($target,$token) = @_;
1427: my $currentstring = '';
1428: if ($target eq 'web' || $target eq 'webgrade') {
1429: $currentstring .= $token->[2];
1430: } elsif ($target eq 'tex') {
1431: $currentstring=&Apache::lonxml::endredirection();
1432: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1433: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1434: $currentstring=~s/(\S)\s*$/$1\}/;
1435: }
1436: return $currentstring;
1437: }
1438:
1439: #-- <s> tag (end tag required)
1440: sub start_s {
1441: my ($target,$token) = @_;
1442: my $currentstring = '';
1443: if ($target eq 'web' || $target eq 'webgrade') {
1444: $currentstring .= $token->[4];
1445: } elsif ($target eq 'tex') {
1446: &Apache::lonxml::startredirection();
1447: }
1448: return $currentstring;
1449: }
1450:
1451: sub end_s {
1452: my ($target,$token) = @_;
1453: my $currentstring = '';
1454: if ($target eq 'web' || $target eq 'webgrade') {
1455: $currentstring .= $token->[2];
1456: } elsif ($target eq 'tex') {
1457: $currentstring=&Apache::lonxml::endredirection();
1458: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1459: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1460: $currentstring=~s/(\S)\s*$/$1\}/;
1461: }
1462: return $currentstring;
1463: }
1464:
1465: #-- <sub> tag (end tag required)
1466: sub start_sub {
1467: my ($target,$token) = @_;
1468: my $currentstring = '';
1469: if ($target eq 'web' || $target eq 'webgrade') {
1470: $currentstring .= $token->[4];
1471: } elsif ($target eq 'tex') {
1472: $currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1473: }
1474: return $currentstring;
1475: }
1476:
1477: sub end_sub {
1478: my ($target,$token) = @_;
1479: my $currentstring = '';
1480: if ($target eq 'web' || $target eq 'webgrade') {
1481: $currentstring .= $token->[2];
1482: } elsif ($target eq 'tex') {
1483: $currentstring .= '}}';
1484: }
1485: return $currentstring;
1486: }
1487:
1488: #-- <sup> tag (end tag required)
1489: sub start_sup {
1490: my ($target,$token) = @_;
1491: my $currentstring = '';
1492: if ($target eq 'web' || $target eq 'webgrade') {
1493: $currentstring .= $token->[4];
1494: } elsif ($target eq 'tex') {
1495: $currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1496: }
1497: return $currentstring;
1498: }
1499:
1500: sub end_sup {
1501: my ($target,$token) = @_;
1502: my $currentstring = '';
1503: if ($target eq 'web' || $target eq 'webgrade') {
1504: $currentstring .= $token->[2];
1505: } elsif ($target eq 'tex') {
1506: $currentstring .= '}}';
1507: }
1508: return $currentstring;
1509: }
1510:
1511: #-- <hr> tag (end tag forbidden)
1512: sub start_hr {
1513: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1514: my $currentstring = &end_p(); # End enclosing para.
1515: if ($target eq 'web' || $target eq 'webgrade') {
1516: $currentstring .= $token->[4];
1517: } elsif ($target eq 'tex') {
1518:
1519: # <hr /> can't be inside of <sup><sub> thank you LaTeX.
1520: #
1521: my $restart_sub = 0;
1522: my $restart_sup = 0;
1523:
1524: # Since <sub> and <sup> are simple tags it's ok to turn off/on
1525: # using the start_ stop_ functions.. those tags only care about
1526: # $target.
1527:
1528: if (&is_inside_of($tagstack, "sub")) {
1529: $restart_sub = 1;
1530: $currentstring .= &end_sub($target, $token, $tagstack,
1531: $parstack, $parser, $safeeval);
1532: }
1533: if (&is_inside_of($tagstack, "sup")) {
1534: $restart_sup = 1;
1535: $currentstring .= &end_sup($target, $token, $tagstack,
1536: $parstack, $parser, $safeeval);
1537: }
1538:
1539: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1540: if (defined $LaTeXwidth) {
1541: if ($LaTeXwidth=~/^%/) {
1542: substr($LaTeXwidth,0,1)='';
1543: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1544: }
1545: } else {
1546: $LaTeXwidth ='0.9\textwidth';
1547: }
1548: my ($pre,$post);
1549: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1550: if (($align eq 'center') || (not defined $align)) {
1551: $pre=''; $post='';
1552: } elsif ($align eq 'left') {
1553: $pre='\rlap{'; $post='} \hfill';
1554: } elsif ($align eq 'right') {
1555: $pre=' \hfill \llap{'; $post='}';
1556: }
1557: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1558: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1559: # Turn stuff back on that we can't be inside of.
1560:
1561: if ($restart_sub) {
1562: $currentstring .= &start_sub($target, $token, $tagstack,
1563: $parstack, $parser, $safeeval);
1564: }
1565: if ($restart_sup) {
1566: $currentstring .= &start_sup($target, $token, $tagstack,
1567: $parstack, $parser, $safeeval);
1568: }
1569: }
1570: return $currentstring;
1571: }
1572:
1573: sub end_hr {
1574: my ($target,$token) = @_;
1575: my $currentstring = '';
1576: if ($target eq 'web' || $target eq 'webgrade') {
1577: $currentstring .= $token->[2];
1578: }
1579: return $currentstring;
1580: }
1581:
1582: #-- <div> tag (end tag required)
1583: {
1584:
1585: # Since div can be nested, the stack below is used
1586: # in 'tex' mode to store the ending strings
1587: # for the div stack.
1588:
1589: my @div_end_stack;
1590:
1591: sub start_div {
1592: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1593: my $currentstring = &end_p(); # Close enclosing para.
1594: if ($target eq 'web' || $target eq 'webgrade') {
1595: $currentstring .= $token->[4];
1596: }
1597: if ($target eq 'tex') {
1598: # 4 possible alignments: left, right, center, and -missing-.
1599: # If inside a table row, we must let the table logic
1600: # do the alignment, however.
1601: #
1602:
1603: my $endstring = '';
1604:
1605: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1606: $safeeval, undef, 1));
1607: if ($align eq 'center') {
1608: $currentstring .= '\begin{center}';
1609: $endstring = '\end{center}';
1610: if (&is_inside_of($tagstack, "table")) {
1611: $currentstring = ¢er_correction().$currentstring;
1612: $endstring .= ¢er_end_correction();
1613: }
1614: }
1615: elsif ($align eq 'right') {
1616: $currentstring .= '\begin{flushright}';
1617: $endstring .= '\end{flushright}';
1618: } elsif ($align eq 'left') {
1619: $currentstring .= '\begin{flushleft}';
1620: $endstring = '\end{flushleft}';
1621: } else {
1622:
1623: }
1624: $currentstring .= "\n"; # For human readability.
1625: $endstring = "\n$endstring\n"; # For human readability
1626: push(@div_end_stack, $endstring);
1627: }
1628: return $currentstring;
1629: }
1630:
1631: sub end_div {
1632: my ($target,$token) = @_;
1633: my $currentstring = '';
1634: if ($target eq 'web' || $target eq 'webgrade') {
1635: $currentstring .= $token->[2];
1636: }
1637: if ($target eq 'tex') {
1638: my $endstring = pop @div_end_stack;
1639: $currentstring .= $endstring;
1640: }
1641: return $currentstring;
1642: }
1643: }
1644:
1645: #-- <a> tag (end tag required)
1646: sub start_a {
1647: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1648: my $currentstring = '';
1649: if ($target eq 'web' || $target eq 'webgrade') {
1650: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1651: undef,1);
1652: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1653: if ($href =~ /\S/) {
1654: if ($href !~ m{^https?://}) {
1655: my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
1656: my $linkurl;
1657: if ($href =~ m{^/uploaded/}) {
1658: $linkurl = $href;
1659: } elsif ($href =~ m{^[^/]}) {
1660: my $path = $url;
1661: $path =~ s{[^/]*$}{};
1662: $linkurl = $path.$href;
1663: }
1664: if ($linkurl =~ m{^/uploaded/}) {
1665: if (!&Apache::lonnet::allowed('bre',$linkurl)) {
1666: if (&Apache::lonnet::is_on_map($url)) {
1667: &Apache::lonxml::extlink($linkurl);
1668: }
1669: }
1670: }
1671: }
1672: }
1673: }
1674: return $currentstring;
1675: }
1676:
1677: sub end_a {
1678: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1679: my $currentstring = '';
1680: if ($target eq 'web' || $target eq 'webgrade') {
1681: $currentstring .= $token->[2];
1682: }
1683: if ($target eq 'tex') {
1684: my $href =
1685: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1686: my $name =
1687: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1688: my $uriprint =
1689: &Apache::lonxml::get_param('uriprint',$parstack,$safeeval,undef,1);
1690: my $anchorprint =
1691: &Apache::lonxml::get_param('anchorprint',$parstack,$safeeval,undef,1);
1692: if (($href =~ /\S/) && ($uriprint=~/^on|uriprint|yes|1$/i)) {
1693: $href =~ s/([^\\])%/$1\\\%/g;
1694: # Substitute special symbols... and allow line breaks at each /
1695: #
1696: $href = &Apache::lonxml::latex_special_symbols($href);
1697: $href =~ s/\//\/\\-/g; # Map / to /\- to allow hyphenation.
1698: $currentstring .= ' ({\tt URI:'.$href.'})';
1699: } elsif (($name =~ /\S/) && ($anchorprint=~/^on|anchorprint|yes|1$/i)) {
1700: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1701: } else {
1702: $currentstring.='';
1703: }
1704: }
1705: return $currentstring;
1706: }
1707:
1708: #-- <li> tag (end tag optional)
1709: sub start_li {
1710: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1711: my $currentstring = '';
1712: if ($target eq 'web' || $target eq 'webgrade') {
1713: $currentstring = $token->[4];
1714: } elsif ($target eq 'tex') {
1715: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1716: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1717: #FIXME need to support types i and I
1718: if ($type=~/disc/) {
1719: $currentstring .= ' \item[$\bullet$] ';
1720: } elsif ($type=~/circle/) {
1721: $currentstring .= ' \item[$\circ$] ';
1722: } elsif ($type=~/square/) {
1723: $currentstring .= ' \item[$\diamond$] ';
1724: } elsif ($type eq '1') {
1725: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1726: } elsif ($type eq 'A') {
1727: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1728: } elsif ($type eq 'a') {
1729: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1730: } elsif ($value ne '') {
1731: $currentstring .= ' \item['.$value.'] ';
1732: } else {
1733: $currentstring .= ' \item ';
1734: }
1735: $Apache::londefdef::list_index++;
1736: }
1737: return $currentstring;
1738: }
1739:
1740: sub end_li {
1741: my ($target,$token) = @_;
1742: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1743: if ($target eq 'web' || $target eq 'webgrade') {
1744: $currentstring .= $token->[2];
1745: }
1746: return $currentstring;
1747: }
1748:
1749: #-- <u> tag (end tag required)
1750: sub start_u {
1751: my ($target,$token) = @_;
1752: my $currentstring = '';
1753: if ($target eq 'web' || $target eq 'webgrade') {
1754: $currentstring .= $token->[4];
1755: } elsif ($target eq 'tex') {
1756: &Apache::lonxml::startredirection();
1757: }
1758: return $currentstring;
1759: }
1760:
1761: sub end_u {
1762: my ($target,$token) = @_;
1763: my $currentstring = '';
1764: if ($target eq 'web' || $target eq 'webgrade') {
1765: $currentstring .= $token->[2];
1766: } elsif ($target eq 'tex') {
1767: $currentstring=&Apache::lonxml::endredirection();
1768: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1769: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1770: $currentstring=~s/(\S)\s*$/$1\}/;
1771: }
1772: return $currentstring;
1773: }
1774:
1775: #-- <ul> tag (end tag required)
1776: sub start_ul {
1777: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1778: my $currentstring = &end_p(); # Close off enclosing list.
1779: if ($target eq 'web' || $target eq 'webgrade') {
1780: $currentstring .= $token->[4];
1781: } elsif ($target eq 'tex') {
1782: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1783: $Apache::londefdef::list_index=0;
1784: if ($TeXtype eq 'disc') {
1785: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1786: '\renewcommand{\labelitemii}{$\bullet$}'.
1787: '\renewcommand{\labelitemiii}{$\bullet$}'.
1788: '\renewcommand{\labelitemiv}{$\bullet$}';
1789: } elsif ($TeXtype eq 'circle') {
1790: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1791: '\renewcommand{\labelitemii}{$\circ$}'.
1792: '\renewcommand{\labelitemiii}{$\circ$}'.
1793: '\renewcommand{\labelitemiv}{$\circ$}';
1794: } elsif ($TeXtype eq 'square') {
1795: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1796: '\renewcommand{\labelitemii}{$\diamond$}'.
1797: '\renewcommand{\labelitemiii}{$\diamond$}'.
1798: '\renewcommand{\labelitemiv}{$\diamond$}';
1799: }
1800: $currentstring .= '\strut \begin{itemize}';
1801: }
1802: return $currentstring;
1803: }
1804:
1805: sub end_ul {
1806: my ($target,$token) = @_;
1807: my $currentstring = '';
1808: if ($target eq 'web' || $target eq 'webgrade') {
1809: $currentstring = $token->[2];
1810: } elsif ($target eq 'tex') {
1811: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1812: '\renewcommand{\labelitemii}{$\bullet$}'.
1813: '\renewcommand{\labelitemiii}{$\bullet$}'.
1814: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1815: }
1816: return $currentstring;
1817: }
1818:
1819: #-- <menu> tag (end tag required)
1820: sub start_menu {
1821: my ($target,$token) = @_;
1822: my $currentstring = '';
1823: if ($target eq 'web' || $target eq 'webgrade') {
1824: $currentstring = $token->[4];
1825: } elsif ($target eq 'tex') {
1826: $currentstring = " \\begin{itemize} ";
1827: }
1828: return $currentstring;
1829: }
1830:
1831: sub end_menu {
1832: my ($target,$token) = @_;
1833: my $currentstring = '';
1834: if ($target eq 'web' || $target eq 'webgrade') {
1835: $currentstring = $token->[2];
1836: } elsif ($target eq 'tex') {
1837: $currentstring = " \\end{itemize}";
1838: }
1839: return $currentstring;
1840: }
1841:
1842: #-- <dir> tag (end tag required)
1843: sub start_dir {
1844: my ($target,$token) = @_;
1845: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1846: if ($target eq 'web' || $target eq 'webgrade') {
1847: $currentstring .= $token->[4];
1848: } elsif ($target eq 'tex') {
1849: $currentstring .= " \\begin{itemize} ";
1850: }
1851: return $currentstring;
1852: }
1853:
1854: sub end_dir {
1855: my ($target,$token) = @_;
1856: my $currentstring = '';
1857: if ($target eq 'web' || $target eq 'webgrade') {
1858: $currentstring = $token->[2];
1859: } elsif ($target eq 'tex') {
1860: $currentstring = " \\end{itemize}";
1861: }
1862: return $currentstring;
1863: }
1864:
1865: #-- <ol> tag (end tag required)
1866: sub start_ol {
1867: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1868: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1869: if ($target eq 'web' || $target eq 'webgrade') {
1870: $currentstring .= $token->[4];
1871: } elsif ($target eq 'tex') {
1872: $Apache::londefdef::list_index=0;
1873: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1874: if ($type eq '1') {
1875: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1876: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1877: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1878: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1879: } elsif ($type eq 'A') {
1880: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1881: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1882: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1883: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1884: } elsif ($type eq 'a') {
1885: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1886: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1887: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1888: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1889: } elsif ($type eq 'i') {
1890: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1891: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1892: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1893: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1894: } elsif ($type eq 'I') {
1895: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1896: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1897: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1898: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1899: }
1900: $currentstring .= '\strut \begin{enumerate}';
1901: }
1902: return $currentstring;
1903: }
1904:
1905: sub end_ol {
1906: my ($target,$token) = @_;
1907: my $currentstring = '';
1908: if ($target eq 'web' || $target eq 'webgrade') {
1909: $currentstring = $token->[2];
1910: } elsif ($target eq 'tex') {
1911: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1912: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1913: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1914: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1915: }
1916: return $currentstring;
1917: }
1918:
1919: #-- <dl> tag (end tag required)
1920: sub start_dl {
1921: my ($target,$token) = @_;
1922: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1923: if ($target eq 'web' || $target eq 'webgrade') {
1924: $currentstring .= $token->[4];
1925: } elsif ($target eq 'tex') {
1926: $currentstring .= '\begin{description}';
1927: $Apache::londefdef::DL++;
1928: push(@Apache::londefdef::description,[]);
1929: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1930: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1931: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1932: }
1933: return $currentstring;
1934: }
1935:
1936: sub end_dl {
1937: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1938: my $currentstring = '';
1939: if ($target eq 'web' || $target eq 'webgrade') {
1940: $currentstring = $token->[2];
1941: } elsif ($target eq 'tex') {
1942: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1943: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1944: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1945: $currentstring.=' '.$element.' ';
1946: }
1947: pop(@Apache::londefdef::description);
1948: $currentstring.='\end{description}';
1949: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1950: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1951: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1952: $Apache::londefdef::DL--;
1953: }
1954: return $currentstring;
1955: }
1956:
1957: #-- <dt> tag (end tag optional)
1958: sub start_dt {
1959: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1960: my $currentstring='';
1961: if ($target eq 'web' || $target eq 'webgrade') {
1962: $currentstring = $token->[4];
1963: } elsif ($target eq 'tex') {
1964: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1965: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1966: &Apache::lonxml::startredirection();
1967: $Apache::londefdef::DT[-1]++;
1968: $Apache::londefdef::seenDT[-1]=1;
1969: }
1970: return $currentstring;
1971: }
1972:
1973: sub end_dt {
1974: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1975: my $currentstring = '';
1976: if ($target eq 'web' || $target eq 'webgrade') {
1977: $currentstring = $token->[2];
1978: } elsif ($target eq 'tex') {
1979: if ($Apache::londefdef::DT[-1]) {
1980: my $data=&item_cleanup();
1981: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1982: $Apache::londefdef::DT[-1]--;
1983: }
1984: }
1985: return $currentstring;
1986: }
1987:
1988: sub item_cleanup {
1989: my $item=&Apache::lonxml::endredirection();
1990: $item=~s/\\begin{center}//g;
1991: $item=~s/\\end{center}//g;
1992: return $item;
1993: }
1994:
1995: #-- <dd> tag (end tag optional)
1996: sub start_dd {
1997: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1998: my $currentstring = '';
1999: if ($target eq 'web' || $target eq 'webgrade') {
2000: $currentstring = $token->[4];
2001: } elsif ($target eq 'tex') {
2002: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
2003: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
2004: if (!$Apache::londefdef::seenDT[-1]) {
2005: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
2006: }
2007: push(@{$Apache::londefdef::description[-1]},'');
2008: $Apache::londefdef::description[-1]->[-1].=' \strut ';
2009: $Apache::londefdef::DD[-1]++;
2010: &Apache::lonxml::startredirection();
2011: }
2012: return $currentstring;
2013: }
2014:
2015: sub end_dd {
2016: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2017: my $currentstring = '';
2018: if ($target eq 'web' || $target eq 'webgrade') {
2019: $currentstring = $token->[2];
2020: } elsif ($target eq 'tex') {
2021: $Apache::londefdef::description[-1]->[-1].=
2022: &Apache::lonxml::endredirection().' \vskip 0mm ';
2023: $Apache::londefdef::DD[-1]--;
2024: }
2025: return $currentstring;
2026: }
2027:
2028: #-- <table> tag (end tag required)
2029: # <table> also ends any prior <p> that is not closed.
2030: # but, unless I allow <p>'s to nest, that's the
2031: # only way I could think of to allow <p> in
2032: # <tr> <th> bodies
2033: #
2034: #list of supported attributes: border,width,TeXwidth
2035: sub start_table {
2036: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2037: my $textwidth = '';
2038: my $currentstring = &end_p();
2039: if ($target eq 'web' || $target eq 'webgrade') {
2040: $currentstring .= $token->[4];
2041: } elsif ($target eq 'tex') {
2042: &disable_para(); # Can't have paras in a table.
2043: push(@Apache::londefdef::table, {});
2044: $Apache::londefdef::table[-1]{'row_number'} = -1;
2045: #maximum table's width (default coincides with text line length)
2046: if ($#Apache::londefdef::table==0) {
2047: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
2048: $textwidth=~/(\d+\.?\d*)/;
2049: $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
2050: } else {
2051: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
2052: #the maximum width of nested table is determined by LATeX width of parent cell
2053: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
2054: } else {
2055: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
2056: $textwidth=$Apache::londefdef::table[-2]{'width'};
2057: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
2058: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
2059: }
2060: }
2061: }
2062:
2063: # width either comes forced from the TeXwidth or the width parameters.
2064: # in either case it can be a percentage or absolute width.
2065: # in the width case we ignore absolute width
2066: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2067: if (!defined($TeXwidth)) {
2068: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
2069: $safeeval,undef,1);
2070: if ($htmlwidth =~ /%/) {
2071: $TeXwidth = $htmlwidth;
2072: } else {
2073: $TeXwidth = $textwidth;
2074: }
2075: }
2076: # if the width is specified as a % it is converted to an absolute width.
2077: # otherwise.. just plugged right in the hash
2078:
2079: if ($TeXwidth=~/%/) {
2080: $TeXwidth=~/(\d+)/;
2081: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
2082: } else {
2083: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
2084: }
2085: # In the end, however the table width cannot be wider than $textwidth...
2086:
2087: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
2088: $Apache::londefdef::table[-1]{'width'} = $textwidth;
2089: }
2090: #table's border
2091: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2092: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2093: unless (defined $border) { $border = 0; }
2094: if ($border) {
2095: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
2096: $Apache::londefdef::table[-1]{'vinc'} = '&';
2097: $Apache::londefdef::table[-1]{'vvinc'} = '|';
2098: } else {
2099: $Apache::londefdef::table[-1]{'hinc'} = '';
2100: $Apache::londefdef::table[-1]{'vinc'} = '&';
2101: $Apache::londefdef::table[-1]{'vvinc'} = '';
2102: }
2103: if ($#Apache::londefdef::table==0) {
2104: # Note that \newline seems to destroy the alignment envs.
2105: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2106: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2107: }
2108: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2109: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2110: $Apache::londefdef::table[-1]{'objectlen'}=[];
2111: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2112: $Apache::londefdef::table[-1]{'maxlen'}=[];
2113: $Apache::londefdef::table[-1]{'minlen'}=[];
2114: $Apache::londefdef::table[-1]{'content'}=[];
2115: $Apache::londefdef::table[-1]{'align'}=[];
2116: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2117:
2118:
2119: }
2120: return $currentstring;
2121: }
2122:
2123: sub end_table {
2124: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2125: my $currentstring = '';
2126: if ($target eq 'web' || $target eq 'webgrade') {
2127: $currentstring = $token->[2];
2128: } elsif ($target eq 'tex') {
2129: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2130: my $inmemory = '';
2131: my $output = '';
2132: my $WARNING='';
2133: #width of columns from TeXwidth attributes
2134:
2135: # Protect against unbalanced </table> tag.
2136:
2137: if (scalar(@Apache::londefdef::table) > 0) {
2138:
2139: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2140: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2141: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2142: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2143: }
2144: }
2145: }
2146: #free space and number of empty columns
2147: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2148: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2149: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2150: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2151: $empty_columns++;
2152: } else {
2153: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2154: }
2155: }
2156:
2157: #boundaries for contents columns
2158: my @min_len=();#columns can not be narrower
2159: my @max_len=();#maximum length of column
2160: my $avg_max;
2161: my $avg_min;
2162: my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
2163: for (my $jn=0;$jn<=$counter_cols; $jn++) {
2164: my ($localmin,$localmax)=(0,0);
2165: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2166: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2167: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2168: }
2169: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2170: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2171: }
2172: }
2173: push @min_len, $localmin;
2174: push @max_len, $localmax;
2175: $avg_max = $localmax + $avg_max;
2176: $avg_min = $localmin + $avg_min;
2177: }
2178: # Does not really matter what the average max/min are if there are no cols.
2179: # and this prevents div 0 in that case.
2180:
2181: if ($counter_cols != 0) {
2182: $avg_max = $avg_max/$counter_cols;
2183: $avg_min = $avg_min/$counter_cols;
2184: }
2185:
2186:
2187: # I don't think the below is needed.. but just in case:
2188:
2189: if ($avg_min > $avg_max) {
2190: my $temp = $avg_min;
2191: $avg_min = $avg_max;
2192: $avg_max = $temp;
2193: }
2194:
2195:
2196: for (my $jn=0;$jn<=$counter_cols;$jn++) {
2197: my $localmin=0,;
2198: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2199: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2200: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2201: }
2202: }
2203: if ($max_len[$jn]<$localmin) {
2204: $max_len[$jn]=$localmin;
2205: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2206: }#object size is bigger
2207: if ($min_len[$jn]<$localmin) {
2208: $min_len[$jn]=$localmin;
2209: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2210: }#object size is bigger
2211: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2212: $min_len[$jn]=0;
2213: $max_len[$jn]=0;
2214: }
2215: # Spans seem to be really bothered by max/min = 0. So if we have one
2216: # make it an average joe max/min.
2217:
2218: if ($max_len[$jn] == 0) {
2219: $max_len[$jn] = $avg_max;
2220: }
2221: if ($min_len[$jn] == 0) {
2222: $min_len[$jn] = $avg_min;
2223: }
2224:
2225: }
2226: #final adjustment of column width
2227: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2228: my @adjust=();
2229: #step 1. adjustment by maximum value
2230: my $space_needed=0;
2231: for (my $jn=0;$jn<=$#max_len;$jn++) {
2232: $space_needed=$space_needed+$max_len[$jn];
2233: }
2234: if ($space_needed<=$available_space) {
2235:
2236: for (my $jn=0;$jn<=$#max_len;$jn++) {
2237: if ($fwidth[$jn]==0) {
2238: $fwidth[$jn]=$max_len[$jn];
2239: }
2240: }
2241: } else {
2242: #step 2. adjustment by minimum value (estimation)
2243: $space_needed=0;
2244: for (my $jn=0;$jn<=$#min_len;$jn++) {
2245: $space_needed+=$min_len[$jn];
2246: }
2247: if ($space_needed>$available_space) {
2248: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2249: for (my $jn=0;$jn<=$#max_len;$jn++) {
2250: if ($fwidth[$jn]==0) {
2251: $fwidth[$jn]=$min_len[$jn];
2252: }
2253: }
2254: #check if we have objects which can be scaled
2255: my $how_many_to_scale=0;
2256: my @to_scale=();
2257: for (my $jn=0;$jn<=$#max_len;$jn++) {
2258: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2259: $how_many_to_scale++;
2260: push @to_scale, $jn;
2261: }
2262: }
2263: if ($how_many_to_scale>0) {
2264: my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
2265: foreach my $jn (@to_scale) {
2266: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2267: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2268: if ($1 ne '') {
2269: my $current_length=&recalc($1);
2270: $current_length=~/(\d+\.?\d*)/;
2271: $current_length=$current_length-$space_to_adjust;
2272: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2273: }
2274: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2275: if ($1 ne '') {
2276: my $current_length=$1;
2277: $current_length=$current_length-$space_to_adjust;
2278: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2279: }
2280: }
2281: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2282: }
2283: }
2284: } else {
2285: #step 3. adjustment over minimal + corrections
2286: my $enlarge_coef=$available_space/$space_needed;
2287: my $acsessive=0;
2288: for (my $jn=0;$jn<=$#min_len;$jn++) {
2289: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2290: if ($adjust[$jn]>$max_len[$jn]) {
2291: $fwidth[$jn]=$max_len[$jn];
2292: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2293: $adjust[$jn]=0;
2294:
2295: }
2296: }
2297: if ($acsessive>0) {
2298: #we have an excess of space and can redistribute it
2299: my $notempty_columns=0;
2300: for (my $jn=0;$jn<=$#min_len;$jn++) {
2301: if ($adjust[$jn]!=0) {
2302: $notempty_columns++;
2303: }
2304: }
2305: my $per_column=$acsessive/$notempty_columns;
2306: for (my $jn=0;$jn<=$#min_len;$jn++) {
2307: if ($adjust[$jn]!=0) {
2308: $adjust[$jn]+=$per_column;
2309: $fwidth[$jn]=$adjust[$jn];
2310: }
2311: }
2312: } else {
2313: for (my $jn=0;$jn<=$#min_len;$jn++) {
2314: $fwidth[$jn]=$adjust[$jn];
2315: }
2316: }
2317: }
2318: }
2319: # use all available width or specified width as if not specified,
2320: # the specified width gets defaulted to the available width.
2321:
2322: my $current=0;
2323: for (my $i=0;$i<=$#fwidth;$i++) {
2324: $current+=$fwidth[$i];
2325: }
2326: if ($current == 0) {
2327: $current = $Apache::londefdef::table[-1]{'width'};
2328: }
2329: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2330: for (my $i=0;$i<=$#fwidth;$i++) {
2331: $fwidth[$i]*=$coef;
2332: }
2333: #removing of empty columns if allowed
2334: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2335: if ($permission eq 'yes') {
2336: my @cleaned_table=();
2337: my @cleaned_header=();
2338: my $colind=0;
2339: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2340: if ($fwidth[$jn]!=0) {
2341: #we need to copy column
2342: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2343: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2344: $cleaned_header[$colind]=$fwidth[$jn];
2345: }
2346: $colind++;
2347: }
2348: }
2349: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2350: @fwidth=@cleaned_header;
2351: }
2352:
2353:
2354: #construct header of the table
2355: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2356: for (my $in=0;$in<=$#fwidth;$in++) {
2357: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2358: }
2359: $header_of_table .= '}';
2360:
2361: #fill the table
2362: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2363: my $have_rowspan = 0;
2364: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2365:
2366: #-----------------------------------------------------------
2367: # I think this order of doing things will ensure that
2368: # single rowspan, columspan and combined row/colspans will
2369: # work correctly. LaTeX is delicate here.
2370: # RF.
2371:
2372: # Start a rowspan if necessary:
2373:
2374: my $primary_col_width = $fwidth[$jn]; # Width of primary column.
2375: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2376: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2377: #
2378: # Do the appropriate magic if this has a colspan
2379: #
2380:
2381: my $border_char = "";
2382: if ($border) {
2383: $border_char = "|";
2384: }
2385: my $spanwidth = 0;
2386: if ($colspan > 1) {
2387: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2388: $spanwidth += $fwidth[$spancol];
2389: }
2390: $output .= '\multicolumn{'.
2391: $colspan
2392: ."}";
2393: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2394: $output .= '{'.$border_char.'c'.$border_char.'}{';
2395: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2396: $output .= '{'.$border_char.'r'.$border_char.'}{';
2397: }
2398: else {
2399: $output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
2400: }
2401:
2402: } else {
2403: $spanwidth = $primary_col_width; # If no span width will be just colwidth
2404: }
2405:
2406: # Rowspan... if colspan is 1, and there's an alignment we'll need
2407: # to kick in a multicolumn in order to get the alignment spec.
2408: # this must precede the multirow or LaTex gets quite upset.
2409: # Naturally if colspan > 1 we've already done that above ^
2410: #
2411: my $multirow_aligned = 0;
2412: if ($rowspan > 1) {
2413: if ($colspan == 1) {
2414: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2415: $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
2416: $multirow_aligned = 1;
2417: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2418: $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
2419: $multirow_aligned = 1;
2420: }
2421: }
2422: $have_rowspan++;
2423: if ($multirow_aligned) {
2424: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2425: } else {
2426: $output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
2427: }
2428:
2429: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2430: s{^\s*\\par\s*}{};
2431: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2432: s{\s*\\vskip\s*0pt\s*$}{};
2433:
2434: #
2435: # If we did not throw in a multicolumn to align, then add
2436: # an extra {
2437: # so we close correctly without having to keep additional state
2438: # around
2439: #
2440: if (!$multirow_aligned) {
2441: $output .= '{';
2442: }
2443: }
2444: if (($rowspan eq '^') || ($rowspan eq '_')) {
2445: $have_rowspan++;
2446: }
2447: #--------------------------------------------------------------
2448:
2449:
2450: # For right and center alignment of single cells.
2451: # we are going to use a multicolumn with a span of 1 to specify alignment.
2452: #
2453: if ($colspan == 1 && $rowspan == 1) {
2454: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2455: $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
2456: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2457: $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
2458: }
2459: }
2460:
2461: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2462:
2463: if (($colspan == 1 && $rowspan == 1) &&
2464: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2465: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2466: $output .= '}';
2467: }
2468:
2469: # Close off any open multirow:
2470:
2471: if ($rowspan > 1) {
2472: $output .= '}}';
2473: }
2474: # Close off the colspan...
2475: #
2476: if ($colspan > 1) {
2477: $output .= '}';
2478: $jn += $colspan-1; # Adjust for number of rows really left.
2479: }
2480: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2481: }
2482: # If have_rowspan > 0, and borders are on, then
2483: # we need to do more than put an \hline at the bottom of row.
2484: # we need to do the appropriate \cline to ensure that
2485: # the spanned rows don't have \hlines through them.
2486:
2487: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2488: $output .= ' \\\\ ';
2489: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2490: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2491: if ($rowspan ne "^") {
2492: if (($rowspan <= 1) || ($rowspan eq '_')) {
2493: my $column = $jn+1;
2494: $output .= '\cline{'.$column.'-'.$column.'} ';
2495: }
2496: }
2497: }
2498:
2499: } else {
2500: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2501: }
2502: }
2503: # Note that \newline destroys alignment env's produced by e.g. <div>
2504: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2505: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2506: if ($#Apache::londefdef::table > 0) {
2507: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2508: # Figure out max/and min width by summing us and then
2509: # apply that to the current column of the table we nest in
2510: # if it's larger than the current width or the current width
2511: # is undefined.
2512: #
2513: my $min_nested_width = 0;
2514: my $max_nested_width = 0;
2515: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2516: $min_nested_width += $min_len[$col];
2517: $max_nested_width += $max_len[$col];
2518:
2519: }
2520: # Fudge in an extra 5 mm for borders etc:
2521:
2522: $min_nested_width += 5;
2523: $max_nested_width += 5;
2524:
2525: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2526: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2527: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2528: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2529: }
2530: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2531: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2532: }
2533:
2534: pop @Apache::londefdef::table;
2535: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2536: } else {
2537: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2538: pop @Apache::londefdef::table;
2539: undef @Apache::londefdef::table;
2540: }
2541: }
2542: &enable_para();
2543: }
2544: return $currentstring;
2545: }
2546:
2547: #-- <tr> tag (end tag optional)
2548: sub start_tr {
2549: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2550: my $currentstring = '';
2551: if ($target eq 'web' || $target eq 'webgrade') {
2552: $currentstring = $token->[4];
2553: } elsif ($target eq 'tex') {
2554: $Apache::londefdef::table[-1]{'row_number'}++;
2555: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2556: if ($alignchar ne '') {
2557: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2558: } else {
2559: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2560: }
2561: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2562: #
2563: # Need to save the number of table columns to preserve the max # columns.
2564: #
2565: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2566: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2567: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2568: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2569: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2570: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2571: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2572: }
2573: return $currentstring;
2574: }
2575:
2576: sub end_tr {
2577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2578: my $currentstring = &end_p(); # Close any pending <p> in the row.
2579: if ($target eq 'web' || $target eq 'webgrade') {
2580: $currentstring .= $token->[2];
2581: } elsif ($target eq 'tex') {
2582: if ($Apache::londefdef::TD_redirection) {
2583: &end_td_tex($parstack,$parser,$safeeval);
2584: }
2585: # Counter columns must be the maximum number of columns seen
2586: # in the table so far so:
2587: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2588: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2589: }
2590:
2591:
2592:
2593: }
2594: return $currentstring;
2595: }
2596:
2597: #-- <td> tag (end tag optional)
2598: sub start_td {
2599: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2600: my $currentstring = '';
2601: if ($target eq 'web' || $target eq 'webgrade') {
2602: $currentstring = $token->[4];
2603: } elsif ($target eq 'tex') {
2604: $Apache::londefdef::TD_redirection = 1;
2605: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2606: }
2607: return $currentstring;
2608: }
2609:
2610: sub tag_check {
2611: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2612: my @ar=@$parstack;
2613: for (my $i=$#ar-1;$i>=0;$i--) {
2614: if (lc($$tagstack[$i]) eq $good_tag) {
2615: &start_td_tex($parstack,$parser,$safeeval);
2616: last;
2617: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2618: splice @ar, $i+1;
2619: &end_td_tex(\@ar,$parser,$safeeval);
2620: &start_td_tex($parstack,$parser,$safeeval);
2621: last;
2622: }
2623: }
2624: return '';
2625: }
2626:
2627: sub start_td_tex {
2628: my ($parstack,$parser,$safeeval) = @_;
2629: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2630: if ($alignchar eq '') {
2631: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2632: }
2633: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2634: $Apache::londefdef::table[-1]{'counter_columns'}++;
2635: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2636: if (defined $TeXwidth) {
2637: my $current_length=&recalc($TeXwidth);
2638: $current_length=~/(\d+\.?\d*)/;
2639: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2640: }
2641: &Apache::lonxml::startredirection();
2642: return '';
2643: }
2644:
2645: sub end_td_tex {
2646: my ($parstack,$parser,$safeeval) = @_;
2647: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2648: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2649: my $data = &Apache::lonxml::endredirection();
2650:
2651: # The rowspan array of the table indicates which cells are part of a span.
2652: # n indicates the start of a span set of n rows.
2653: # ^ indicates a cell that continues a span set.
2654: # _ indicates the cell is at the bottom of a span set.
2655: # If this and subsequent cells are part of a rowspan, we must
2656: # push along the row until we find one that is not.
2657:
2658: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2659: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2660: # Part of a span.
2661: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2662: $current_column++;
2663: }
2664: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2665:
2666:
2667: # Get the column and row spans.
2668: # Colspan can be done via \multicolumn if I can figure out the data structs.
2669:
2670: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2671: if (!$colspan) {
2672: $colspan = 1;
2673: }
2674:
2675: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2676: if (!$rowspan) {
2677: $rowspan = 1;
2678: }
2679:
2680:
2681:
2682: for (my $c = 0; $c < $colspan; $c++) {
2683: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2684: for (my $i = 1; $i < $rowspan; $i++) {
2685: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2686: if ($i == ($rowspan-1)) {
2687: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2688: }
2689: }
2690: }
2691:
2692: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2693: if (defined $TeXwidth) {
2694: for (my $c = 0; $c < $colspan; $c++) {
2695: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2696: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2697: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2698: }
2699: } else {
2700: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2701: my $garbage_data=$data;
2702: my $fwidth=0;
2703: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2704: my $current_length=&recalc($1);
2705: $current_length=~/(\d+\.?\d*)/;
2706: if ($fwidth<$1) {$fwidth=$1;}
2707: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2708: }
2709: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2710: my $current_length=$1;
2711: if ($fwidth<$current_length) {$fwidth=$current_length;}
2712: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2713: }
2714: for (my $c = 0; $c < $colspan; $c++) {
2715: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2716: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2717: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2718: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2719: }
2720: } 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)*/) {
2721: my $garbage_data=$data;
2722: my $fwidth=0;
2723: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2724: my $current_length=&recalc($1);
2725: $current_length=~/(\d+\.?\d*)/;
2726: if ($fwidth<$1) {$fwidth=$1;}
2727: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2728: }
2729: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2730: my $current_length=&recalc($1);
2731: $current_length=~/(\d+\.?\d*)/;
2732: if ($fwidth<$1) {$fwidth=$1;}
2733: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2734: }
2735: for (my $c = 0; $c < $colspan; $c++) {
2736: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2737: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2738: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2739: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2740: }
2741: $data=~s/\\\\\s*$//;
2742: } else {
2743: $data=~s/^\s+(\S.*)/$1/;
2744: $data=~s/(.*\S)\s+$/$1/;
2745: $data=~s/(\s)+/$1/;
2746: my ($current_length,$min_length)=(0,0);
2747: if ($data=~/\\vskip/) {
2748: my $newdata=$data;
2749: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2750: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2751: foreach my $elementdata (@newdata) {
2752: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2753: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2754: my @words=split(/ /,$elementdata);
2755: foreach my $word (@words) {
2756: my $lengthword=2.5*&LATEX_length($word);
2757: if ($min_length<$lengthword) {$min_length=$lengthword;}
2758: }
2759: }
2760: } else {
2761: $current_length=2.5*&LATEX_length($data);
2762: my @words=split(/ /,$data);
2763: foreach my $word (@words) {
2764: my $lengthword=2*&LATEX_length($word);
2765: if ($min_length<$lengthword) {$min_length=$lengthword;}
2766: }
2767: }
2768: for (my $c = 0; $c < $colspan; $c++) {
2769: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2770: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2771: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2772: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2773: }
2774: }
2775: }
2776: # Substitute all of the tables nested in this cell in their appropriate places.
2777:
2778:
2779: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2780: for (my $in=0; $in<=$nested_count; $in++) {
2781: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2782: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2783: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2784: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2785:
2786: }
2787: # Should be be killing off the 'include' elements as they're used up?
2788:
2789: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2790:
2791:
2792:
2793:
2794: # the colspan array will indicate how many columns will be spanned by this
2795: # cell..this requires that counter_columns also be adjusted accordingly
2796: # so that the next bunch of text goes in the right cell. Note that since
2797: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2798: #
2799:
2800: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2801: for (my $i = 0; $i < ($colspan -1); $i++) {
2802: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2803: }
2804: for (my $r = 0; $r < $rowspan; $r++) {
2805: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2806: # Put empty text in spanned cols.
2807:
2808: }
2809:
2810:
2811:
2812: return '';
2813: }
2814:
2815: sub end_td {
2816: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2817: my $currentstring = '';
2818: if ($target eq 'web' || $target eq 'webgrade') {
2819: $currentstring = $token->[2];
2820: } elsif ($target eq 'tex') {
2821: $Apache::londefdef::TD_redirection =0;
2822: &end_td_tex($parstack,$parser,$safeeval);
2823: }
2824: return $currentstring;
2825: }
2826:
2827: #-- <th> tag (end tag optional)
2828: sub start_th {
2829: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2830: my $currentstring = '';
2831: if ($target eq 'web' || $target eq 'webgrade') {
2832: $currentstring = $token->[4];
2833: } elsif ($target eq 'tex') {
2834: $Apache::londefdef::TD_redirection = 1;
2835: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2836: }
2837: return $currentstring;
2838: }
2839:
2840: sub tagg_check {
2841: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2842: my @ar=@$parstack;
2843: for (my $i=$#ar-1;$i>=0;$i--) {
2844: if (lc($$tagstack[$i]) eq $good_tag) {
2845: &start_th_tex($parstack,$parser,$safeeval);
2846: last;
2847: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2848: splice @ar, $i+1;
2849: &end_th_tex(\@ar,$parser,$safeeval);
2850: &start_th_tex($parstack,$parser,$safeeval);
2851: last;
2852: }
2853: }
2854: return '';
2855: }
2856:
2857: sub start_th_tex {
2858: my ($parstack,$parser,$safeeval) = @_;
2859: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2860: if ($alignchar eq '') {
2861: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2862: }
2863: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2864: $Apache::londefdef::table[-1]{'counter_columns'}++;
2865: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2866: if (defined $TeXwidth) {
2867: my $current_length=&recalc($TeXwidth);
2868: $current_length=~/(\d+\.?\d*)/;
2869: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2870: }
2871: &Apache::lonxml::startredirection();
2872: return '';
2873: }
2874:
2875: sub end_th_tex {
2876: my ($parstack,$parser,$safeeval) = @_;
2877: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2878: my $data=&Apache::lonxml::endredirection();
2879: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2880: if (defined $TeXwidth) {
2881: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2882: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2883: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2884: } else {
2885: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2886: my $garbage_data=$data;
2887: my $fwidth=0;
2888: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2889: my $current_length=&recalc($1);
2890: $current_length=~/(\d+\.?\d*)/;
2891: if ($fwidth<$1) {$fwidth=$1;}
2892: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2893: }
2894: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2895: my $current_length=$1;
2896: if ($fwidth<$current_length) {$fwidth=$current_length;}
2897: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2898: }
2899: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2900: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2901: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2902: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2903: } else {
2904: $data=~s/^\s+(\S.*)/$1/;
2905: $data=~s/(.*\S)\s+$/$1/;
2906: $data=~s/(\s)+/$1/;
2907: my ($current_length,$min_length)=(0,0);
2908: if ($data=~/\\vskip/) {
2909: my $newdata=$data;
2910: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2911: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2912: foreach my $elementdata (@newdata) {
2913: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2914: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2915: my @words=split(/ /,$elementdata);
2916: foreach my $word (@words) {
2917: my $lengthword=2.5*&LATEX_length($word);
2918: if ($min_length<$lengthword) {$min_length=$lengthword;}
2919: }
2920: }
2921: } else {
2922: $current_length=2.5*&LATEX_length($data);
2923: my @words=split(/ /,$data);
2924: foreach my $word (@words) {
2925: my $lengthword=2*&LATEX_length($word);
2926: if ($min_length<$lengthword) {$min_length=$lengthword;}
2927: }
2928: }
2929: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2930: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2931: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2932: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2933: }
2934: }
2935: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2936: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2937: }
2938: #make data bold
2939: $data='\textbf{'.$data.'}';
2940: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2941: return'';
2942: }
2943:
2944: sub end_th {
2945: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2946: my $currentstring = &end_p(); # Close any open <p> in the row.
2947: if ($target eq 'web' || $target eq 'webgrade') {
2948: $currentstring .= $token->[2];
2949: } elsif ($target eq 'tex') {
2950: $Apache::londefdef::TD_redirection =0;
2951: &end_th_tex($parstack,$parser,$safeeval);
2952: }
2953: return $currentstring;
2954: }
2955:
2956: #-- <img> tag (end tag forbidden)
2957: #
2958: # Render the <IMG> tag.
2959: # <IMG> has the following attributes (in addition to the
2960: # standard HTML ones:
2961: # TeXwrap - Governs how the tex target will try to wrap text around
2962: # horizontally aligned images.
2963: # TeXwidth - The width of the image when rendered for print (mm).
2964: # TeXheight - The height of the image when rendered for print (mm)
2965: # (Note there seems to also be support for this as a % of page size)
2966: #
2967: sub start_img {
2968: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2969: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2970: undef,1);
2971: if (! $src &&
2972: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2973: ) {
2974: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2975: return '';
2976: }
2977: &Apache::lonxml::extlink($src);
2978: my $currentstring = '';
2979: my $scaling = .3;
2980:
2981: # Render unto browsers that which are the browser's...
2982:
2983: if ($target eq 'web' || $target eq 'webgrade') {
2984: if ($env{'browser.imagesuppress'} ne 'on') {
2985: my $enc = ('yes' eq
2986: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2987: $safeeval)));
2988: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2989: $enc);
2990: } else {
2991: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2992: undef,1);
2993: if (!$alttag) {
2994: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2995: $src);
2996: }
2997: $currentstring.='[IMAGE: '.$alttag.']';
2998: }
2999:
3000: # and render unto TeX that which is LaTeX
3001:
3002: } elsif ($target eq 'tex') {
3003: #
3004: # The alignment will require some superstructure to be put around
3005: # the \includegraphics stuff. At present we can only partially
3006: # simulate the alignments offered by html.
3007: #
3008: #
3009: my $align = lc(&Apache::lonxml::get_param('align',
3010: $parstack,
3011: $safeeval,
3012: undef,1));
3013: if(!$align) {
3014: $align = "bottom"; # This is html's default so it's ours too.
3015: }
3016: #
3017: &Apache::lonxml::debug("Alignemnt = $align");
3018: # LaTeX's image/text wrapping is really bad since it wants to
3019: # make figures float.
3020: # The user has the optional parameter (applicable only to l/r
3021: # alignment to use the picins/parpic directive to get wrapped text
3022: # this is also imperfect.. that's why we give them a choice...
3023: # so they can't yell at us for our choice.
3024: #
3025: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
3026: $parstack,
3027: $safeeval,
3028: undef,0);
3029: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
3030: if(!$latex_rendering) {
3031: $latex_rendering = "texwrap";
3032: }
3033: # using texwrap inside a table does not work. So, if after all of this,
3034: # texwrap is on, we turn it off if we detect we're in a table:
3035: #
3036: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
3037: $latex_rendering = 'parpic';
3038: }
3039:
3040: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
3041:
3042: #if original bmp/gif/jpg/png file exist do following:
3043: my $origsrc=$src;
3044: my ($path,$file) = &get_eps_image($src);
3045: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
3046: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
3047: &Apache::lonxml::debug("path = $path file = $file src = $src");
3048: if (-e $src) {
3049: &Apache::lonxml::debug("$src exists");
3050: my ($height_param,$width_param)=
3051: &image_size($origsrc,0.3,$parstack,$safeeval);
3052: my $size;
3053: if ($width_param) { $size.='width='.$width_param.' mm,'; }
3054: if ($height_param) { $size.='height='.$height_param.' mm]'; }
3055: # Default size if not able to extract that (e.g. eps image).
3056:
3057: # &Apache::lonnet::logthis("Size = $size");
3058:
3059: $size='['.$size;
3060: $size=~s/,$/]/;
3061: $currentstring .= '\graphicspath{{'.$path.'}}'
3062: .'\includegraphics'.$size.'{'.$file.'} ';
3063: my $closure;
3064: ($currentstring, $closure) = &align_latex_image($align,
3065: $latex_rendering,
3066: $currentstring,
3067: $width_param,
3068: $height_param);
3069: $currentstring .= $closure;
3070:
3071: } else {
3072: &Apache::lonxml::debug("$src does not exist");
3073: #original image file doesn't exist so check the alt attribute
3074: my $alt =
3075: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
3076: unless ($alt) {
3077: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3078: }
3079:
3080: if ($alt) { $currentstring .= ' '.$alt.' '; }
3081: }
3082:
3083: # And here's where the semi-quote breaks down: allow the user
3084: # to edit the beast as well by rendering the problem for edit:
3085: } elsif ($target eq 'edit') {
3086: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
3087: $currentstring .=&Apache::edit::tag_start($target,$token);
3088: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
3089: &Apache::edit::browse('src',undef,'alt',$only).' '.
3090: &Apache::edit::search('src',undef,'alt').'<br />';
3091: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
3092: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
3093: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
3094: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
3095: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
3096: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
3097: ['','bottom','middle','top','left','right'],$token,5);
3098: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
3099: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
3100: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
3101: ['no','yes'], $token, 2);
3102: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
3103: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
3104: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
3105: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
3106: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
3107:
3108: if ($token->[2]{'src'}=~/\$/) {
3109: $currentstring.='Variable image source';
3110: } else {
3111: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
3112: if ($width) { $currentstring.=' width="'.$width.'" '; }
3113: if ($height) { $currentstring.=' height="'.$height.'" '; }
3114: $currentstring .= ' />';
3115: }
3116: } elsif ($target eq 'modified') {
3117: my ($osrc,$owidth,$oheight)=
3118: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3119: my $ctag=&Apache::edit::get_new_args($token,$parstack,
3120: $safeeval,'src','alt','align',
3121: 'TeXwidth','TeXheight', 'TeXwrap',
3122: 'width','height','encrypturl');
3123: my ($nsrc,$nwidth,$nheight)=
3124: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3125: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
3126: &image_replication($loc);
3127: my ($iwidth,$iheight);
3128: if (-e $loc) {
3129: my $image = Image::Magick->new;
3130: $image->Read($loc);
3131: ($iwidth, $iheight) = ($image->Get('width'),
3132: $image->Get('height'));
3133: }
3134: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
3135: # changed image or no size specified,
3136: # if they didn't explicitly change the
3137: # width or height use the ones from the image
3138: if ($iwidth && $iheight) {
3139: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
3140: $token->[2]{'width'} = $iwidth;$ctag=1;
3141: }
3142: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
3143: $token->[2]{'height'}=$iheight;$ctag=1;
3144: }
3145: }
3146: }
3147: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
3148: # if we don't have a width or height
3149: if ($iwidth && $cwidth && !$cheight) {
3150: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
3151: }
3152: if ($iheight && $cheight && !$cwidth) {
3153: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
3154: }
3155: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3156: }
3157:
3158: return $currentstring;
3159: }
3160:
3161: sub end_img {
3162: my ($target,$token) = @_;
3163: my $currentstring = '';
3164: if ($target eq 'web' || $target eq 'webgrade') {
3165: $currentstring = $token->[2];
3166: } elsif ($target eq 'tex') {
3167: $currentstring = '';
3168: }
3169: return $currentstring;
3170: }
3171:
3172: #-- <applet> tag (end tag required)
3173: sub start_applet {
3174: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3175:
3176: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3177: &Apache::lonxml::extlink($code);
3178: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3179: undef,1);
3180: &Apache::lonxml::extlink($archive);
3181: my $currentstring = '';
3182: if ($target eq 'web' || $target eq 'webgrade') {
3183: if ($env{'browser.appletsuppress'} ne 'on') {
3184: $currentstring = &Apache::lonenc::encrypt_ref($token,
3185: {'code'=>$code,
3186: 'archive'=>$archive}
3187: );
3188: } else {
3189: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3190: $safeeval,undef,1);
3191: unless ($alttag) {
3192: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3193: $code);
3194: }
3195: $currentstring='[APPLET: '.$alttag.']';
3196: }
3197: } elsif ($target eq 'tex') {
3198: # Turn off some stuff we can't be inside thank you LaTeX
3199:
3200:
3201: my $restart_sub = 0;
3202: my $restart_sup = 0;
3203:
3204: # Since <sub> and <sup> are simple tags it's ok to turn off/on
3205: # using the start_ stop_ functions.. those tags only care about
3206: # $target.
3207:
3208: if (&is_inside_of($tagstack, "sub")) {
3209: $restart_sub = 1;
3210: $currentstring .= &end_sub($target, $token, $tagstack,
3211: $parstack, $parser, $safeeval);
3212: }
3213: if (&is_inside_of($tagstack, "sup")) {
3214: $restart_sup = 1;
3215: $currentstring .= &end_sup($target, $token, $tagstack,
3216: $parstack, $parser, $safeeval);
3217: }
3218:
3219: # Now process the applet; just replace it with its alt attribute.
3220:
3221: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3222: $safeeval,undef,1);
3223: unless ($alttag) {
3224: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3225: undef,1);
3226: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3227: $code);
3228: }
3229: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3230: '.}\end{center}';
3231:
3232: # Turn stuff back on that we can't be inside of.
3233:
3234: if ($restart_sub) {
3235: $currentstring .= &start_sub($target, $token, $tagstack,
3236: $parstack, $parser, $safeeval);
3237: }
3238: if ($restart_sup) {
3239: $currentstring .= &start_sup($target, $token, $tagstack,
3240: $parstack, $parser, $safeeval);
3241: }
3242: }
3243: return $currentstring;
3244: }
3245:
3246: sub end_applet {
3247: my ($target,$token) = @_;
3248: my $currentstring = '';
3249: if ($target eq 'web' || $target eq 'webgrade') {
3250: $currentstring = $token->[2];
3251: } elsif ($target eq 'tex') {
3252: }
3253: return $currentstring;
3254: }
3255:
3256: #-- <embed> tag (end tag optional/required)
3257: sub start_embed {
3258: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3259: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3260: &Apache::lonxml::extlink($src);
3261: my $currentstring = '';
3262: if ($target eq 'web' || $target eq 'webgrade') {
3263: if ($env{'browser.embedsuppress'} ne 'on') {
3264: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3265: } else {
3266: my $alttag=&Apache::lonxml::get_param
3267: ('alt',$parstack,$safeeval,undef,1);
3268: unless ($alttag) {
3269: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3270: }
3271: $currentstring='[EMBED: '.$alttag.']';
3272: }
3273: } elsif ($target eq 'tex') {
3274: }
3275: return $currentstring;
3276: }
3277:
3278: sub end_embed {
3279: my ($target,$token) = @_;
3280: my $currentstring = '';
3281: if ($target eq 'web' || $target eq 'webgrade') {
3282: $currentstring = $token->[2];
3283: } elsif ($target eq 'tex') {
3284: }
3285: return $currentstring;
3286: }
3287:
3288: #-- <param> tag (end tag forbidden)
3289: sub start_param {
3290: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3291: if (&Apache::lonxml::get_param('name',$parstack,
3292: $safeeval,undef,1)=~/^cabbase$/i) {
3293: my $value=&Apache::lonxml::get_param('value',$parstack,
3294: $safeeval,undef,1);
3295: &Apache::lonxml::extlink($value);
3296: }
3297:
3298: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3299: &Apache::lonxml::extlink($src);
3300: my $currentstring = '';
3301: if ($target eq 'web' || $target eq 'webgrade') {
3302: my %toconvert;
3303: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3304: if ($src) { $toconvert{'src'}= $src; }
3305: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3306: undef,1);
3307: if ($name=~/^cabbase$/i) {
3308: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3309: $safeeval,undef,1);
3310: }
3311: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3312: } elsif ($target eq 'tex') {
3313: }
3314: return $currentstring;
3315: }
3316:
3317: sub end_param {
3318: my ($target,$token) = @_;
3319: my $currentstring = '';
3320: if ($target eq 'web' || $target eq 'webgrade') {
3321: $currentstring = $token->[2];
3322: } elsif ($target eq 'tex') {
3323: }
3324: return $currentstring;
3325: }
3326:
3327: #-- <allow> tag
3328: sub start_allow {
3329: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3330: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3331: &Apache::lonxml::extlink($src);
3332:
3333: if ($target eq 'tex') { &image_replication($src); }
3334: my $result;
3335: if ($target eq 'edit') {
3336: $result .=&Apache::edit::tag_start($target,$token);
3337: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3338: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3339: } elsif ($target eq 'modified') {
3340: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3341: $safeeval,'src');
3342: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3343: }
3344: return $result;
3345: }
3346:
3347: sub end_allow {
3348: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3349: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3350: return '';
3351: }
3352:
3353: #-- Frames (end tag required)
3354: #-- <frameset>
3355: sub start_frameset {
3356: my ($target,$token) = @_;
3357: my $currentstring = ''; # Close any pending para.
3358: if ($target eq 'web' || $target eq 'webgrade') {
3359: $currentstring =
3360: &Apache::loncommon::start_page($Apache::londefdef::title,
3361: $Apache::londefdef::head,
3362: {'add_entries' => $token->[2],
3363: 'no_title' => 1,
3364: 'force_register' => 1,
3365: 'frameset' => 1,});
3366:
3367: }
3368: return $currentstring;
3369: }
3370:
3371: sub end_frameset {
3372: my ($target,$token) = @_;
3373: my $currentstring = '';
3374: if ($target eq 'web' || $target eq 'webgrade') {
3375: $currentstring = $token->[2];
3376: }
3377: return $currentstring;
3378: }
3379:
3380: #-- <xmp> (end tag required)
3381: sub start_xmp {
3382: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3383: my $currentstring = '';
3384: if ($target eq 'web' || $target eq 'webgrade') {
3385: $currentstring .= $token->[4];
3386: } elsif ($target eq 'tex') {
3387: $currentstring .= '\begin{verbatim}';
3388: }
3389: return $currentstring;
3390: }
3391:
3392: sub end_xmp {
3393: my ($target,$token) = @_;
3394: my $currentstring = '';
3395: if ($target eq 'web' || $target eq 'webgrade') {
3396: $currentstring .= $token->[2];
3397: } elsif ($target eq 'tex') {
3398: $currentstring .= '\end{verbatim}';
3399: }
3400: return $currentstring;
3401: }
3402:
3403: #-- <pre> (end tag required)
3404: sub start_pre {
3405: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3406: my $currentstring = &end_p(); # close off pending <p>
3407: if ($target eq 'web' || $target eq 'webgrade') {
3408: $currentstring .= $token->[4];
3409: } elsif ($target eq 'tex') {
3410: $currentstring .= '\begin{verbatim}';
3411: &Apache::lonxml::disable_LaTeX_substitutions();
3412: }
3413: return $currentstring;
3414: }
3415:
3416: sub end_pre {
3417: my ($target,$token) = @_;
3418: my $currentstring = '';
3419: if ($target eq 'web' || $target eq 'webgrade') {
3420: $currentstring .= $token->[2];
3421: } elsif ($target eq 'tex') {
3422: $currentstring .= '\end{verbatim}';
3423: &Apache::lonxml::enable_LaTeX_substitutions();
3424: }
3425: return $currentstring;
3426: }
3427:
3428: #-- <insert>
3429: sub start_insert {
3430: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3431: my $currentstring = '';
3432: if ($target eq 'web' || $target eq 'webgrade') {
3433: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3434: $currentstring .= '<b>'.$display.'</b>';;
3435: }
3436: return $currentstring;
3437: }
3438:
3439: sub end_insert {
3440: my ($target,$token) = @_;
3441: my $currentstring = '';
3442: if ($target eq 'web' || $target eq 'webgrade') {
3443: $currentstring .= '';
3444: }
3445: return $currentstring;
3446: }
3447:
3448: #-- <externallink>
3449: sub start_externallink {
3450: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3451: my $currentstring = '';
3452: if ($target eq 'web' || $target eq 'webgrade') {
3453: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3454: $currentstring .= '<b>'.$display.'</b>';;
3455: }
3456: return $currentstring;
3457: }
3458:
3459: sub end_externallink {
3460: my ($target,$token) = @_;
3461: my $currentstring = '';
3462: if ($target eq 'web' || $target eq 'webgrade') {
3463: $currentstring .= '';
3464: }
3465: return $currentstring;
3466: }
3467:
3468: #-- <blankspace heigth="">
3469: sub start_blankspace {
3470: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3471: my $currentstring = &end_p(); # closes off any unclosed <p>
3472: if ($target eq 'tex') {
3473: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3474: $currentstring .= '\vskip '.$howmuch.' ';
3475: }
3476: return $currentstring;
3477: }
3478:
3479: sub end_blankspace {
3480: my ($target,$token) = @_;
3481: my $currentstring = '';
3482: if ($target eq 'tex') {
3483: $currentstring .= '';
3484: }
3485: return $currentstring;
3486: }
3487:
3488: #-- <abbr> tag (end tag required)
3489: sub start_abbr {
3490: my ($target,$token) = @_;
3491: my $currentstring = '';
3492: if ($target eq 'web' || $target eq 'webgrade') {
3493: $currentstring = $token->[4];
3494: }
3495: return $currentstring;
3496: }
3497:
3498: sub end_abbr {
3499: my ($target,$token) = @_;
3500: my $currentstring = '';
3501: if ($target eq 'web' || $target eq 'webgrade') {
3502: $currentstring = $token->[2];
3503: }
3504: return $currentstring;
3505: }
3506:
3507: #-- <acronym> tag (end tag required)
3508: sub start_acronym {
3509: my ($target,$token) = @_;
3510: my $currentstring = '';
3511: if ($target eq 'web' || $target eq 'webgrade') {
3512: $currentstring = $token->[4];
3513: }
3514: return $currentstring;
3515: }
3516:
3517: sub end_acronym {
3518: my ($target,$token) = @_;
3519: my $currentstring = '';
3520: if ($target eq 'web' || $target eq 'webgrade') {
3521: $currentstring = $token->[2];
3522: }
3523: return $currentstring;
3524: }
3525:
3526: #-- <area> tag (end tag forbidden)
3527: sub start_area {
3528: my ($target,$token) = @_;
3529: my $currentstring = '';
3530: if ($target eq 'web' || $target eq 'webgrade') {
3531: $currentstring = $token->[4];
3532: }
3533: return $currentstring;
3534: }
3535:
3536: sub end_area {
3537: my ($target,$token) = @_;
3538: my $currentstring = '';
3539: if ($target eq 'web' || $target eq 'webgrade') {
3540: $currentstring = $token->[2];
3541: }
3542: return $currentstring;
3543: }
3544:
3545: #-- <base> tag (end tag forbidden)
3546: sub start_base {
3547: my ($target,$token) = @_;
3548: my $currentstring = '';
3549: if ($target eq 'web' || $target eq 'webgrade') {
3550: $currentstring = $token->[4];
3551: }
3552: return $currentstring;
3553: }
3554:
3555: sub end_base {
3556: my ($target,$token) = @_;
3557: my $currentstring = '';
3558: if ($target eq 'web' || $target eq 'webgrade') {
3559: $currentstring = $token->[2];
3560: }
3561: return $currentstring;
3562: }
3563:
3564: #-- <bdo> tag (end tag required)
3565: sub start_bdo {
3566: my ($target,$token) = @_;
3567: my $currentstring = '';
3568: if ($target eq 'web' || $target eq 'webgrade') {
3569: $currentstring = $token->[4];
3570: }
3571: return $currentstring;
3572: }
3573:
3574: sub end_bdo {
3575: my ($target,$token) = @_;
3576: my $currentstring = '';
3577: if ($target eq 'web' || $target eq 'webgrade') {
3578: $currentstring = $token->[2];
3579: }
3580: return $currentstring;
3581: }
3582:
3583: #-- <bgsound> tag (end tag optional)
3584: sub start_bgsound {
3585: my ($target,$token) = @_;
3586: my $currentstring = '';
3587: if ($target eq 'web' || $target eq 'webgrade') {
3588: $currentstring = $token->[4];
3589: }
3590: return $currentstring;
3591: }
3592:
3593: sub end_bgsound {
3594: my ($target,$token) = @_;
3595: my $currentstring = '';
3596: if ($target eq 'web' || $target eq 'webgrade') {
3597: $currentstring = $token->[2];
3598: }
3599: return $currentstring;
3600: }
3601:
3602: #-- <blink> tag (end tag required)
3603: sub start_blink {
3604: my ($target,$token) = @_;
3605: my $currentstring = '';
3606: if ($target eq 'web' || $target eq 'webgrade') {
3607: $currentstring = $token->[4];
3608: }
3609: return $currentstring;
3610: }
3611:
3612: sub end_blink {
3613: my ($target,$token) = @_;
3614: my $currentstring = '';
3615: if ($target eq 'web' || $target eq 'webgrade') {
3616: $currentstring = $token->[2];
3617: }
3618: return $currentstring;
3619: }
3620:
3621: #-- <blockquote> tag (end tag required)
3622: sub start_blockquote {
3623: my ($target,$token) = @_;
3624: my $currentstring = &end_p(); # Close any unclosed <p>
3625: if ($target eq 'web' || $target eq 'webgrade') {
3626: $currentstring .= $token->[4];
3627: }
3628: if ($target eq 'tex') {
3629: $currentstring .= '\begin{quote}';
3630: }
3631: return $currentstring;
3632: }
3633:
3634: sub end_blockquote {
3635: my ($target,$token) = @_;
3636: my $currentstring = '';
3637: if ($target eq 'web' || $target eq 'webgrade') {
3638: $currentstring = $token->[2];
3639: }
3640: if ($target eq 'tex') {
3641: $currentstring = '\end{quote}';
3642: }
3643: return $currentstring;
3644: }
3645:
3646: #-- <button> tag (end tag required)
3647: sub start_button {
3648: my ($target,$token) = @_;
3649: my $currentstring = '';
3650: if ($target eq 'web' || $target eq 'webgrade') {
3651: $currentstring = $token->[4];
3652: }
3653: return $currentstring;
3654: }
3655:
3656: sub end_button {
3657: my ($target,$token) = @_;
3658: my $currentstring = '';
3659: if ($target eq 'web' || $target eq 'webgrade') {
3660: $currentstring = $token->[2];
3661: }
3662: return $currentstring;
3663: }
3664:
3665: #-- <caption> tag (end tag required)
3666: sub start_caption {
3667: my ($target,$token) = @_;
3668: my $currentstring = '';
3669: if ($target eq 'web' || $target eq 'webgrade') {
3670: $currentstring = $token->[4];
3671: }
3672: return $currentstring;
3673: }
3674:
3675: sub end_caption {
3676: my ($target,$token) = @_;
3677: my $currentstring = '';
3678: if ($target eq 'web' || $target eq 'webgrade') {
3679: $currentstring = $token->[2];
3680: }
3681: return $currentstring;
3682: }
3683:
3684: #-- <col> tag (end tag forbdden)
3685: sub start_col {
3686: my ($target,$token) = @_;
3687: my $currentstring = '';
3688: if ($target eq 'web' || $target eq 'webgrade') {
3689: $currentstring = $token->[4];
3690: }
3691: return $currentstring;
3692: }
3693:
3694: sub end_col {
3695: my ($target,$token) = @_;
3696: my $currentstring = '';
3697: if ($target eq 'web' || $target eq 'webgrade') {
3698: $currentstring = $token->[2];
3699: }
3700: return $currentstring;
3701: }
3702:
3703: #-- <colgroup> tag (end tag optional)
3704: sub start_colgroup {
3705: my ($target,$token) = @_;
3706: my $currentstring = '';
3707: if ($target eq 'web' || $target eq 'webgrade') {
3708: $currentstring = $token->[4];
3709: }
3710: return $currentstring;
3711: }
3712:
3713: sub end_colgroup {
3714: my ($target,$token) = @_;
3715: my $currentstring = '';
3716: if ($target eq 'web' || $target eq 'webgrade') {
3717: $currentstring = $token->[2];
3718: }
3719: return $currentstring;
3720: }
3721:
3722: #-- <del> tag (end tag required)
3723: sub start_del {
3724: my ($target,$token) = @_;
3725: my $currentstring = '';
3726: if ($target eq 'web' || $target eq 'webgrade') {
3727: $currentstring = $token->[4];
3728: }
3729: return $currentstring;
3730: }
3731:
3732: sub end_del {
3733: my ($target,$token) = @_;
3734: my $currentstring = '';
3735: if ($target eq 'web' || $target eq 'webgrade') {
3736: $currentstring = $token->[2];
3737: }
3738: return $currentstring;
3739: }
3740:
3741: #-- <fieldset> tag (end tag required)
3742: sub start_fieldset {
3743: my ($target,$token) = @_;
3744: my $currentstring = '';
3745: if ($target eq 'web' || $target eq 'webgrade') {
3746: $currentstring = $token->[4];
3747: }
3748: return $currentstring;
3749: }
3750:
3751: sub end_fieldset {
3752: my ($target,$token) = @_;
3753: my $currentstring = '';
3754: if ($target eq 'web' || $target eq 'webgrade') {
3755: $currentstring = $token->[2];
3756: }
3757: return $currentstring;
3758: }
3759:
3760: #-- <frame> tag (end tag forbidden)
3761: sub start_frame {
3762: my ($target,$token) = @_;
3763: my $currentstring = '';
3764: if ($target eq 'web' || $target eq 'webgrade') {
3765: $currentstring = $token->[4];
3766: }
3767: return $currentstring;
3768: }
3769:
3770: sub end_frame {
3771: my ($target,$token) = @_;
3772: my $currentstring = '';
3773: if ($target eq 'web' || $target eq 'webgrade') {
3774: $currentstring = $token->[2];
3775: }
3776: return $currentstring;
3777: }
3778:
3779: #-- <iframe> tag (end tag required)
3780: sub start_iframe {
3781: my ($target,$token) = @_;
3782: my $currentstring = '';
3783: if ($target eq 'web' || $target eq 'webgrade') {
3784: $currentstring = $token->[4];
3785: }
3786: return $currentstring;
3787: }
3788:
3789: sub end_iframe {
3790: my ($target,$token) = @_;
3791: my $currentstring = '';
3792: if ($target eq 'web' || $target eq 'webgrade') {
3793: $currentstring = $token->[2];
3794: }
3795: return $currentstring;
3796: }
3797:
3798: #-- <ins> tag (end tag required)
3799: sub start_ins {
3800: my ($target,$token) = @_;
3801: my $currentstring = '';
3802: if ($target eq 'web' || $target eq 'webgrade') {
3803: $currentstring = $token->[4];
3804: }
3805: return $currentstring;
3806: }
3807:
3808: sub end_ins {
3809: my ($target,$token) = @_;
3810: my $currentstring = '';
3811: if ($target eq 'web' || $target eq 'webgrade') {
3812: $currentstring = $token->[2];
3813: }
3814: return $currentstring;
3815: }
3816:
3817: #-- <isindex> tag (end tag forbidden)
3818: sub start_isindex {
3819: my ($target,$token) = @_;
3820: my $currentstring = '';
3821: if ($target eq 'web' || $target eq 'webgrade') {
3822: $currentstring = $token->[4];
3823: }
3824: return $currentstring;
3825: }
3826:
3827: sub end_isindex {
3828: my ($target,$token) = @_;
3829: my $currentstring = '';
3830: if ($target eq 'web' || $target eq 'webgrade') {
3831: $currentstring = $token->[2];
3832: }
3833: return $currentstring;
3834: }
3835:
3836: #-- <keygen> tag (end tag forbidden)
3837: sub start_keygen {
3838: my ($target,$token) = @_;
3839: my $currentstring = '';
3840: if ($target eq 'web' || $target eq 'webgrade') {
3841: $currentstring = $token->[4];
3842: }
3843: return $currentstring;
3844: }
3845:
3846: sub end_keygen {
3847: my ($target,$token) = @_;
3848: my $currentstring = '';
3849: if ($target eq 'web' || $target eq 'webgrade') {
3850: $currentstring = $token->[2];
3851: }
3852: return $currentstring;
3853: }
3854:
3855: #-- <label> tag
3856: sub start_label {
3857: my ($target,$token) = @_;
3858: my $currentstring = '';
3859: if ($target eq 'web' || $target eq 'webgrade') {
3860: $currentstring = $token->[4];
3861: }
3862: return $currentstring;
3863: }
3864:
3865: sub end_label {
3866: my ($target,$token) = @_;
3867: my $currentstring = '';
3868: if ($target eq 'web' || $target eq 'webgrade') {
3869: $currentstring = $token->[2];
3870: }
3871: return $currentstring;
3872: }
3873:
3874: #-- <layer> tag (end tag required)
3875: sub start_layer {
3876: my ($target,$token) = @_;
3877: my $currentstring = '';
3878: if ($target eq 'web' || $target eq 'webgrade') {
3879: $currentstring = $token->[4];
3880: }
3881: return $currentstring;
3882: }
3883:
3884: sub end_layer {
3885: my ($target,$token) = @_;
3886: my $currentstring = '';
3887: if ($target eq 'web' || $target eq 'webgrade') {
3888: $currentstring = $token->[2];
3889: }
3890: return $currentstring;
3891: }
3892:
3893: #-- <legend> tag (end tag required)
3894: sub start_legend {
3895: my ($target,$token) = @_;
3896: my $currentstring = '';
3897: if ($target eq 'web' || $target eq 'webgrade') {
3898: $currentstring = $token->[4];
3899: }
3900: return $currentstring;
3901: }
3902:
3903: sub end_legend {
3904: my ($target,$token) = @_;
3905: my $currentstring = '';
3906: if ($target eq 'web' || $target eq 'webgrade') {
3907: $currentstring = $token->[2];
3908: }
3909: return $currentstring;
3910: }
3911:
3912: #-- <link> tag (end tag forbidden)
3913: sub start_link {
3914: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3915: my $currentstring = '';
3916: if ($target eq 'web' || $target eq 'webgrade') {
3917: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3918: undef,1);
3919: &Apache::lonxml::extlink($href);
3920: $currentstring = $token->[4];
3921: }
3922: return $currentstring;
3923: }
3924:
3925: sub end_link {
3926: my ($target,$token) = @_;
3927: my $currentstring = '';
3928: if ($target eq 'web' || $target eq 'webgrade') {
3929: $currentstring = $token->[2];
3930: }
3931: return $currentstring;
3932: }
3933:
3934: #-- <marquee> tag (end tag optional)
3935: sub start_marquee {
3936: my ($target,$token) = @_;
3937: my $currentstring = '';
3938: if ($target eq 'web' || $target eq 'webgrade') {
3939: $currentstring = $token->[4];
3940: }
3941: return $currentstring;
3942: }
3943:
3944: sub end_marquee {
3945: my ($target,$token) = @_;
3946: my $currentstring = '';
3947: if ($target eq 'web' || $target eq 'webgrade') {
3948: $currentstring = $token->[2];
3949: }
3950: return $currentstring;
3951: }
3952:
3953: #-- <multicol> tag (end tag required)
3954: sub start_multicol {
3955: my ($target,$token) = @_;
3956: my $currentstring = &end_p(); # Close any pending <p>
3957: if ($target eq 'web' || $target eq 'webgrade') {
3958: $currentstring .= $token->[4];
3959: }
3960: return $currentstring;
3961: }
3962:
3963: sub end_multicol {
3964: my ($target,$token) = @_;
3965: my $currentstring = '';
3966: if ($target eq 'web' || $target eq 'webgrade') {
3967: $currentstring = $token->[2];
3968: }
3969: return $currentstring;
3970: }
3971:
3972: #-- <nobr> tag (end tag required)
3973: sub start_nobr {
3974: my ($target,$token) = @_;
3975: my $currentstring = '';
3976: if ($target eq 'web' || $target eq 'webgrade') {
3977: $currentstring = $token->[4];
3978: } elsif ($target eq 'tex') {
3979: $currentstring='\mbox{';
3980: }
3981: return $currentstring;
3982: }
3983:
3984: sub end_nobr {
3985: my ($target,$token) = @_;
3986: my $currentstring = '';
3987: if ($target eq 'web' || $target eq 'webgrade') {
3988: $currentstring = $token->[2];
3989: } elsif ($target eq 'tex') {
3990: $currentstring='}';
3991: }
3992: return $currentstring;
3993: }
3994:
3995: #-- <noembed> tag (end tag required)
3996: sub start_noembed {
3997: my ($target,$token) = @_;
3998: my $currentstring = '';
3999: if ($target eq 'web' || $target eq 'webgrade') {
4000: $currentstring = $token->[4];
4001: }
4002: return $currentstring;
4003: }
4004:
4005: sub end_noembed {
4006: my ($target,$token) = @_;
4007: my $currentstring = '';
4008: if ($target eq 'web' || $target eq 'webgrade') {
4009: $currentstring = $token->[2];
4010: }
4011: return $currentstring;
4012: }
4013:
4014: #-- <noframes> tag (end tag required)
4015: sub start_noframes {
4016: my ($target,$token) = @_;
4017: my $currentstring = '';
4018: if ($target eq 'web' || $target eq 'webgrade') {
4019: $currentstring = $token->[4];
4020: }
4021: return $currentstring;
4022: }
4023:
4024: sub end_noframes {
4025: my ($target,$token) = @_;
4026: my $currentstring = '';
4027: if ($target eq 'web' || $target eq 'webgrade') {
4028: $currentstring = $token->[2];
4029: }
4030: return $currentstring;
4031: }
4032:
4033: #-- <nolayer> tag (end tag required)
4034: sub start_nolayer {
4035: my ($target,$token) = @_;
4036: my $currentstring = '';
4037: if ($target eq 'web' || $target eq 'webgrade') {
4038: $currentstring = $token->[4];
4039: }
4040: return $currentstring;
4041: }
4042:
4043: sub end_nolayer {
4044: my ($target,$token) = @_;
4045: my $currentstring = '';
4046: if ($target eq 'web' || $target eq 'webgrade') {
4047: $currentstring = $token->[2];
4048: }
4049: return $currentstring;
4050: }
4051:
4052: #-- <noscript> tag (end tag required)
4053: sub start_noscript {
4054: my ($target,$token) = @_;
4055: my $currentstring = '';
4056: if ($target eq 'web' || $target eq 'webgrade') {
4057: $currentstring = $token->[4];
4058: }
4059: return $currentstring;
4060: }
4061:
4062: sub end_noscript {
4063: my ($target,$token) = @_;
4064: my $currentstring = '';
4065: if ($target eq 'web' || $target eq 'webgrade') {
4066: $currentstring = $token->[2];
4067: }
4068: return $currentstring;
4069: }
4070:
4071: #-- <object> tag (end tag required)
4072: sub start_object {
4073: my ($target,$token) = @_;
4074: my $currentstring = '';
4075: if ($target eq 'web' || $target eq 'webgrade') {
4076: $currentstring = $token->[4];
4077: }
4078: return $currentstring;
4079: }
4080:
4081: sub end_object {
4082: my ($target,$token) = @_;
4083: my $currentstring = '';
4084: if ($target eq 'web' || $target eq 'webgrade') {
4085: $currentstring = $token->[2];
4086: }
4087: return $currentstring;
4088: }
4089:
4090: #-- <optgroup> tag (end tag required)
4091: sub start_optgroup {
4092: my ($target,$token) = @_;
4093: my $currentstring = '';
4094: if ($target eq 'web' || $target eq 'webgrade') {
4095: $currentstring = $token->[4];
4096: }
4097: return $currentstring;
4098: }
4099:
4100: sub end_optgroup {
4101: my ($target,$token) = @_;
4102: my $currentstring = '';
4103: if ($target eq 'web' || $target eq 'webgrade') {
4104: $currentstring = $token->[2];
4105: }
4106: return $currentstring;
4107: }
4108:
4109: #-- <samp> tag (end tag required)
4110: sub start_samp {
4111: my ($target,$token) = @_;
4112: my $currentstring = '';
4113: if ($target eq 'web' || $target eq 'webgrade') {
4114: $currentstring = $token->[4];
4115: } elsif ($target eq 'tex') {
4116: $currentstring='\texttt{';
4117: }
4118: return $currentstring;
4119: }
4120:
4121: sub end_samp {
4122: my ($target,$token) = @_;
4123: my $currentstring = '';
4124: if ($target eq 'web' || $target eq 'webgrade') {
4125: $currentstring = $token->[2];
4126: } elsif ($target eq 'tex') {
4127: $currentstring='}';
4128: }
4129: return $currentstring;
4130: }
4131:
4132: #-- <server> tag
4133: sub start_server {
4134: my ($target,$token) = @_;
4135: my $currentstring = '';
4136: if ($target eq 'web' || $target eq 'webgrade') {
4137: $currentstring = $token->[4];
4138: }
4139: return $currentstring;
4140: }
4141:
4142: sub end_server {
4143: my ($target,$token) = @_;
4144: my $currentstring = '';
4145: if ($target eq 'web' || $target eq 'webgrade') {
4146: $currentstring = $token->[2];
4147: }
4148: return $currentstring;
4149: }
4150:
4151: #-- <spacer> tag (end tag forbidden)
4152: sub start_spacer {
4153: my ($target,$token) = @_;
4154: my $currentstring = &end_p(); # Close off any open <p> tag.
4155: if ($target eq 'web' || $target eq 'webgrade') {
4156: $currentstring .= $token->[4];
4157: }
4158: return $currentstring;
4159: }
4160:
4161: sub end_spacer {
4162: my ($target,$token) = @_;
4163: my $currentstring = '';
4164: if ($target eq 'web' || $target eq 'webgrade') {
4165: $currentstring = $token->[2];
4166: }
4167: return $currentstring;
4168: }
4169:
4170: #-- <span> tag (end tag required)
4171: sub start_span {
4172: my ($target,$token) = @_;
4173: my $currentstring = '';
4174: if ($target eq 'web' || $target eq 'webgrade') {
4175: $currentstring = $token->[4];
4176: }
4177: return $currentstring;
4178: }
4179:
4180: sub end_span {
4181: my ($target,$token) = @_;
4182: my $currentstring = '';
4183: if ($target eq 'web' || $target eq 'webgrade') {
4184: $currentstring = $token->[2];
4185: }
4186: return $currentstring;
4187: }
4188:
4189: #-- <tbody> tag (end tag optional)
4190: sub start_tbody {
4191: my ($target,$token) = @_;
4192: my $currentstring = '';
4193: if ($target eq 'web' || $target eq 'webgrade') {
4194: $currentstring = $token->[4];
4195: }
4196: return $currentstring;
4197: }
4198:
4199: sub end_tbody {
4200: my ($target,$token) = @_;
4201: my $currentstring = '';
4202: if ($target eq 'web' || $target eq 'webgrade') {
4203: $currentstring = $token->[2];
4204: }
4205: return $currentstring;
4206: }
4207:
4208: #-- <tfoot> tag (end tag optional)
4209: sub start_tfoot {
4210: my ($target,$token) = @_;
4211: my $currentstring = '';
4212: if ($target eq 'web' || $target eq 'webgrade') {
4213: $currentstring = $token->[4];
4214: }
4215: return $currentstring;
4216: }
4217:
4218: sub end_tfoot {
4219: my ($target,$token) = @_;
4220: my $currentstring = '';
4221: if ($target eq 'web' || $target eq 'webgrade') {
4222: $currentstring = $token->[2];
4223: }
4224: return $currentstring;
4225: }
4226:
4227: #-- <thead> tag (end tag optional)
4228: sub start_thead {
4229: my ($target,$token) = @_;
4230: my $currentstring = '';
4231: if ($target eq 'web' || $target eq 'webgrade') {
4232: $currentstring = $token->[4];
4233: }
4234: return $currentstring;
4235: }
4236:
4237: sub end_thead {
4238: my ($target,$token) = @_;
4239: my $currentstring = '';
4240: if ($target eq 'web' || $target eq 'webgrade') {
4241: $currentstring = $token->[2];
4242: }
4243: return $currentstring;
4244: }
4245:
4246: #-- <var> tag
4247: sub start_var {
4248: my ($target,$token) = @_;
4249: my $currentstring = '';
4250: if ($target eq 'web' || $target eq 'webgrade') {
4251: $currentstring = $token->[4];
4252: } elsif ($target eq 'tex') {
4253: $currentstring = '\textit{';
4254: }
4255: return $currentstring;
4256: }
4257:
4258: sub end_var {
4259: my ($target,$token) = @_;
4260: my $currentstring = '';
4261: if ($target eq 'web' || $target eq 'webgrade') {
4262: $currentstring = $token->[2];
4263: } elsif ($target eq 'tex') {
4264: $currentstring = '}';
4265: }
4266: return $currentstring;
4267: }
4268:
4269: #-- <wbr> tag (end tag forbidden)
4270: sub start_wbr {
4271: my ($target,$token) = @_;
4272: my $currentstring = '';
4273: if ($target eq 'web' || $target eq 'webgrade') {
4274: $currentstring = $token->[4];
4275: }
4276: return $currentstring;
4277: }
4278:
4279: sub end_wbr {
4280: my ($target,$token) = @_;
4281: my $currentstring = '';
4282: if ($target eq 'web' || $target eq 'webgrade') {
4283: $currentstring = $token->[2];
4284: }
4285: return $currentstring;
4286: }
4287:
4288: #-- <hideweboutput> tag
4289: sub start_hideweboutput {
4290: my ($target,$token) = @_;
4291: if ($target eq 'web' || $target eq 'webgrade') {
4292: &Apache::lonxml::startredirection();
4293: }
4294: return '';
4295: }
4296:
4297: sub end_hideweboutput {
4298: my ($target,$token) = @_;
4299: my $currentstring = '';
4300: if ($target eq 'web' || $target eq 'webgrade') {
4301: $currentstring = &Apache::lonxml::endredirection();
4302: }
4303: return '';
4304: }
4305:
4306:
4307: sub image_replication {
4308: my $src = shift;
4309: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4310: #replicates eps or ps
4311: my $epssrc = my $pssrc = $src;
4312: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4313: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4314: if (not -e $epssrc && not -e $pssrc) {
4315: my $result=&Apache::lonnet::repcopy($epssrc);
4316: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4317: }
4318: return '';
4319: }
4320: #
4321: # Get correct sizing parameter for an image given
4322: # it's initial ht. and wid. This allows sizing of
4323: # images that are generated on-the-fly (e.g. gnuplot)
4324: # as well as serving as a utility for image_size.
4325: #
4326: # Parameter:
4327: # height_param
4328: # width_param - Initial picture dimensions.
4329: # scaling - A scale factor.
4330: # parstack, - the current stack of tag attributes
4331: # from the xml parser
4332: # safeeval, - pointer to the safespace
4333: # depth, - from what level in the stack to look for attributes
4334: # (assumes -1 if unspecified)
4335: # cis - look for attrubutes case insensitively
4336: # (assumes false)
4337: #
4338: # Returns:
4339: # height, width - new dimensions.
4340: #
4341: sub resize_image {
4342: my ($height_param, $width_param, $scaling,
4343: $parstack, $safeeval, $depth, $cis) = @_;
4344:
4345: # First apply the scaling...
4346:
4347: $height_param = $height_param * $scaling;
4348: $width_param = $width_param * $scaling;
4349:
4350: #do we have any specified LaTeX size of the picture?
4351: my $toget='TeXwidth';
4352: if ($cis) {
4353: $toget=lc($toget);
4354: }
4355: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4356: $safeeval,$depth,$cis);
4357: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4358: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4359: $safeeval,$depth,$cis);
4360: #do we have any specified web size of the picture?
4361: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4362: $depth,1);
4363: if ($TeXwidth) {
4364: my $old_width_param=$width_param;
4365: if ($TeXwidth=~/(\d+)\s*\%/) {
4366: $width_param = $1*$env{'form.textwidth'}/100;
4367: } else {
4368: $width_param = $TeXwidth;
4369: }
4370: if ($TeXheight) {
4371: $height_param = $TeXheight;
4372: } elsif ($old_width_param) {
4373: $height_param=$TeXwidth/$old_width_param*$height_param;
4374: }
4375: } elsif ($TeXheight) {
4376: $height_param = $TeXheight;
4377: if ($height_param) {
4378: $width_param = $TeXheight/$height_param*$width_param;
4379: }
4380: } elsif ($width) {
4381: my $old_width_param=$width_param;
4382: $width_param = $width*$scaling;
4383: if ($old_width_param) {
4384: $height_param=$width_param/$old_width_param*$height_param;
4385: }
4386: }
4387: if ($width_param > $env{'form.textwidth'}) {
4388: my $old_width_param=$width_param;
4389: $width_param =0.95*$env{'form.textwidth'};
4390: if ($old_width_param) {
4391: $height_param=$width_param/$old_width_param*$height_param;
4392: }
4393: }
4394:
4395: return ($height_param, $width_param);
4396: }
4397:
4398: sub image_size {
4399: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4400:
4401: #size of image from gif/jpg/jpeg/png
4402: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4403: if (-e $ressrc) {
4404: $src = $ressrc;
4405: }
4406: my $image = Image::Magick->new;
4407: my $current_figure = $image->Read($src);
4408: my $width_param = $image->Get('width');
4409: my $height_param = $image->Get('height');
4410: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4411: undef($image);
4412:
4413: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4414: $scaling, $parstack, $safeeval,
4415: $depth, $cis);
4416:
4417: return ($height_param, $width_param);
4418: }
4419:
4420: sub image_width {
4421: my ($height, $width) = &image_size(@_);
4422: return $width;
4423: }
4424: # Not yet 100% sure this is correct in all circumstances..
4425: # due to my uncertainty about mods to image_size.
4426: #
4427: sub image_height {
4428: my ($height, $width) = &image_size(@_);
4429: return $height;
4430: }
4431:
4432: sub get_eps_image {
4433: my ($src)=@_;
4434: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4435:
4436: # In order to prevent the substitution of the alt text, we need to
4437: # be sure the orig_src file is on system now so:
4438:
4439: if (! -e $orig_src) {
4440: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4441: }
4442: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4443: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(bmp|gif|png|jpg|jpeg)/i);
4444: $src=~s/\.(bmp|gif|png|jpg|jpeg)$/\.eps/i;
4445: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4446: &Apache::lonxml::debug("Filelocation gives: $src");
4447: if (! -e $src) {
4448: &Apache::lonxml::debug("$src does not exist");
4449: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4450: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4451: #if replication failed try to find ps file
4452: $src=~s/\.eps$/\.ps/;
4453: &Apache::lonxml::debug("Now looking for $src");
4454: #if no ps file try to replicate it.
4455: my $didrepcopy = &Apache::lonnet::repcopy($src);
4456: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4457: if ( (not -e $src) ||
4458: ($didrepcopy ne 'ok')) {
4459: &Apache::lonxml::debug("Failed to find or replicate $src");
4460:
4461: #if replication failed try to produce eps file dynamically
4462: $src=~s/\.ps$/\.eps/;
4463: my $temp_file;
4464: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4465: my $newsrc=$orig_src;
4466: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4467: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4468: print FILE ("$newsrc\n");
4469: close(FILE);
4470: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4471: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4472: if ($sext ne "") { # Put the ext. back in to uniquify.
4473: $src =~ s/\.eps$/$sext.eps/;
4474: }
4475:
4476: }
4477:
4478: }
4479: } else {
4480: # If the postscript file has spaces in its name,
4481: # LaTeX will gratuitiously vomit. Therefore
4482: # queue such files for copy with " " replaced by "_".
4483: # printout.pm will know them by their .ps or .eps extensions.
4484: my $newsrc = $orig_src;
4485: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4486: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4487: print FILE "$src\n";
4488: close FILE;
4489: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4490: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4491: }
4492: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4493: $path =~ s/ /\_/g;
4494: $file =~ s/ /\_/g;
4495: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4496: return ($path.'/',$file);
4497: }
4498:
4499: sub eps_generation {
4500: my ($src,$file,$width_param) = @_;
4501: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4502: my $temp_file = Apache::File->new('>>'.$filename);
4503: print $temp_file "$src\n";
4504: my $newsrc = $src;
4505: $newsrc =~ s/(\.bmp|\.gif|\.jpg|\.jpeg)$/\.eps/i;
4506: $newsrc=~s{/home/httpd/html/res}{};
4507: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4508: $newsrc=~s{/\./}{/};
4509: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4510: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4511: $newsrc=~s{/home/httpd/lonUsers}{};
4512: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4513: }
4514: if ($newsrc=~m{/userfiles/}) {
4515: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4516: } else {
4517: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4518: }
4519: }
4520:
4521: sub file_path {
4522: my $src=shift;
4523: my ($file,$path);
4524: if ($src =~ m!(.*)/([^/]*)$!) {
4525: $file = $2;
4526: $path = $1.'/';
4527: }
4528: return $file,$path;
4529: }
4530: # Converts a measurement in to mm from any of
4531: # the other valid LaTeX units of measure.
4532: # If the units of measure are missing from the
4533: # parameter, it is assumed to be in and returned
4534: # with mm units of measure
4535: sub recalc {
4536: my $argument = shift;
4537: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4538: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4539: my $value=$1;
4540: my $units=$2;
4541: if ($units eq 'cm') {
4542: $value*=10;
4543: } elsif ($units eq 'in') {
4544: $value*=25.4;
4545: } elsif ($units eq 'pc') {
4546: $value*=(25.4*12/72.27);
4547: } elsif ($units eq 'pt') {
4548: $value*=(25.4/72.27);
4549: }
4550: return $value.' mm';
4551: }
4552:
4553: sub LATEX_length {
4554: my $garbage=shift;
4555: $garbage=~s/^\s+$//;
4556: $garbage=~s/^\s+(\S.*)/$1/;#space before
4557: $garbage=~s/(.*\S)\s+$/$1/;#space after
4558: $garbage=~s/(\s)+/$1/;#only one space
4559: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4560: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4561: $garbage=~s/([^\\])\$/$1/g;#$
4562: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4563: $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;
4564: $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;
4565: $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;
4566: $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;
4567: $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;
4568: $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;
4569: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4570: #remove some other LaTeX command
4571: $garbage=~s|\\(\w+)\\|\\|g;
4572: $garbage=~s|\\(\w+)(\s*)|$2|g;
4573: $garbage=~s|\+|11|g;
4574: my $value=length($garbage);
4575: return $value;
4576: }
4577:
4578: # Wrap image 'stuff' inside of the LaTeX required to implement
4579: # alignment:
4580: # align_tex_image(align, latex_rendering, image)
4581: # Where:
4582: # align - The HTML alignment specification.
4583: # latex_rendering - rendering hint for latex.
4584: # image - The LaTeX needed to insert the image itsef.
4585: # width,height - dimensions of the image.
4586: # Returns:
4587: # The 1/2 wrapped image and the stuff required to close the
4588: # wrappage. This allows e.g. randomlabel to insert more stuff
4589: # into the closure.
4590: #
4591: sub align_latex_image {
4592: my ($align, $latex_rendering, $image, $width, $height) = @_;
4593: my $currentstring; # The 1/2 wrapped image.
4594: my $closure; # The closure of the wrappage.
4595:
4596: # if it's none just return it back
4597: if ($latex_rendering eq 'none') {
4598: return ($image,'');
4599: }
4600:
4601: # If there's an alignment specification we need to honor it here.
4602: # For the horizontal alignments, we will also honor the
4603: # value of the latex specfication. The default is parbox,
4604: # and that's used for illegal values too.
4605: #
4606: # Even though we set a default alignment value, the user
4607: # could have given us an illegal value. In that case we
4608: # just use the default alignment of bottom..
4609: $currentstring = "\n% figurewrapping \n";
4610: if ($align eq "top") {
4611: $currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
4612: $closure = '}';
4613: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4614: my $offset = $height/2;
4615: $currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
4616: $closure = '}';
4617: } elsif ($align eq "left") {
4618: if ($latex_rendering eq "parpic") {
4619: $currentstring .= '\parpic[l]{'.$image;
4620: $closure = '}';
4621: } elsif ($latex_rendering eq "parbox") {
4622: $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
4623: .$image;
4624: $closure = '\end{minipage}';
4625: } elsif ($latex_rendering eq "wrapfigure"
4626: || $latex_rendering ne 'none') { # wrapfig render
4627: $currentstring .=
4628: '\begin{wrapfigure}{l}{'.$width.'mm}'
4629: .'\scalebox{1.0}{'.$image;
4630: $closure = '}\end{wrapfigure}';
4631: }
4632: } elsif ($align eq "right") {
4633: if ($latex_rendering eq "parpic") {
4634: $currentstring .= '\parpic[r]{'.$image;
4635: $closure = '}';
4636: } elsif ($latex_rendering eq "parbox") {
4637: $currentstring .= '\begin{minipage}[r]{'.$width.'mm}'
4638: .$image;
4639: $closure = '\end{minipage}';
4640: } elsif ($latex_rendering eq "wrapfigure"
4641: || $latex_rendering ne 'none') { # wrapfig render
4642: $currentstring .=
4643: '\begin{wrapfigure}{r}{'.$width.'mm}'
4644: .'\scalebox{1.0}{'.$image;
4645: $closure = '}\end{wrapfigure}';
4646: }
4647: } else { # Bottom is also default.
4648: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4649: $currentstring .= "{$image";
4650: $closure = '}';
4651: }
4652: $currentstring .= "\n% end wrappage\n";
4653: $closure = "\n% Begin closure\n".$closure."\n% End closure\n";
4654: return ($currentstring, $closure);
4655: }
4656:
4657: # is_inside_of $tagstack $tag
4658: # This sub returns true if the current state of Xml processing
4659: # is inside of the tag.
4660: # Parameters:
4661: # tagstack - The tagstack from the parser.
4662: # tag - The tag (without the <>'s.).
4663: # Sample usage:
4664: # if (is_inside_of($tagstack "table")) {
4665: # # I'm in a table....
4666: # }
4667: sub is_inside_of {
4668: my ($tagstack, $tag) = @_;
4669: my @stack = @$tagstack;
4670: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4671: if ($stack[$i] eq $tag) {
4672: return 1;
4673: }
4674: }
4675: return 0;
4676: }
4677:
4678:
4679: 1;
4680: __END__
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