1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.381 2008/02/14 22:37:46 www Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: use LONCAPA();
52: # use Data::Dumper;
53:
54: BEGIN {
55:
56: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
57:
58: }
59:
60: #
61: # Dumps all elements of the table structure.
62: # Need this 'cause evidently when given an array, Data::Dumper only seems
63: # to dump element 0.
64: #
65: #sub debug_dump_table {
66: # my $lastrow = $#Apache::londefdef::table;
67: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
68: # my $row;
69: # for ($row =0; $row <= $lastrow; $row++ ) {
70: # my $text = Dumper($Apache::londefdef::table[$row]);
71: # &Apache::lonnet::logthis("table [ $row ]".$text);
72: # }
73: #}
74: sub initialize_londefdef {
75: $Apache::londefdef::TD_redirection=0;
76: @Apache::londefdef::table = ();
77: $Apache::londefdef::select=0;
78: undef(@Apache::londefdef::description);
79: @Apache::londefdef::DD=(0);
80: @Apache::londefdef::DT=(0);
81: @Apache::londefdef::seenDT=(0);
82: $Apache::londefdef::list_index=0;
83: undef($Apache::londefdef::head);
84: undef($Apache::londefdef::title);
85: }
86:
87: #======================= TAG SUBROUTINES =====================
88: #-- <output>
89: sub start_output {
90: my ($target) = @_;
91: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
92: return '';
93: }
94: sub end_output {
95: my ($target) = @_;
96: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
97: return '';
98: }
99: #-- <m> tag
100: sub start_m {
101: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
102: my $currentstring = '';
103: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
104: if ($target eq 'web' || $target eq 'analyze') {
105: &Apache::lonxml::debug("M is starting with:$inside:");
106: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
107: if ($eval eq 'on') {
108: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
109: #&Apache::lonxml::debug("M is evaulated to:$inside:");
110: }
111: my $tex = $inside;
112: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
113: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
114: if ($Apache::lontexconvert::errorstring) {
115: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
116: $tex = &HTML::Entities::encode($tex,'<>&"');
117: my ($linenumber) =
118: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
119: if (defined($linenumber)) {
120: my @tex=split("\n",$tex);
121: $tex[$linenumber]='<b><font color="red">'.
122: $tex[$linenumber].'</font></b>';
123: $tex=join("\n",@tex);
124: }
125: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
126: $Apache::lontexconvert::errorstring='';
127: }
128: #&Apache::lonxml::debug("M is ends with:$currentstring:");
129: $Apache::lonxml::post_evaluate=0;
130: } elsif ($target eq 'tex') {
131:
132: $currentstring = $inside;
133: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
134: if ($eval eq 'on') {
135: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
136: }
137: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
138: # detect simple math mode entry exits, and convert them
139: # to use \ensuremath ... unless there's a \verb inside.
140: if (! ($currentstring=~/\\verb/)) {
141: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
142: $currentstring=~s/^(\s*)\$/$1/;
143: $currentstring=~s/\$(\s*)$/$1/;
144: $currentstring='\ensuremath{'.$currentstring.'}';
145: }
146: }
147: $Apache::lonxml::post_evaluate=0;
148: }
149: return $currentstring;
150: }
151:
152: sub end_m {
153: my ($target,$token) = @_;
154: my $currentstring = '';
155: if ($target eq 'tex') {
156: $currentstring = "";
157: }
158: return $currentstring;
159: }
160:
161: sub start_tthoption {
162: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
163: my $result;
164: if ($target eq 'web' || $target eq 'webgrade') {
165: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
166: $style);
167: $inside=~s/^\s*//;
168: if ($env{'browser.mathml'}) {
169: &tth::ttmoptions($inside);
170: } else {
171: &tth::tthoptions($inside);
172: }
173: }
174: return $result;
175: }
176:
177: sub end_tthoption {
178: my ($target,$token) = @_;
179: my $result;
180: return $result;
181: }
182:
183: #-- <html> tag (end tag optional)
184: sub start_html {
185: my ($target,$token) = @_;
186: my $currentstring = '';
187: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
188: # start_body() takes care of emitting the <html>
189: } elsif ($target eq 'tex') {
190: $currentstring .=
191: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
192: if (($env{'form.latex_type'}=~'batchmode') ||
193: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
194: $currentstring .= '\newcommand{\keephidden}[1]{}'.
195: '\renewcommand{\deg}{$^{\circ}$}'.
196: '\usepackage{multirow}'.
197: '\usepackage{longtable}'.
198: '\usepackage{textcomp}'.
199: '\usepackage{makeidx}'.
200: '\usepackage[dvips]{graphicx}'.
201: '\usepackage{wrapfig}'.
202: '\usepackage{picins}'.
203: '\usepackage{epsfig}'.
204: '\usepackage{calc}'.
205: '\usepackage{amsmath}'.
206: '\usepackage{amssymb}'.
207: '\usepackage{amsfonts}'.
208: '\usepackage{amsthm}'.
209: '\usepackage{amscd}'.
210: '\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}}'.
211: '\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}}';
212: }
213: return $currentstring;
214: }
215:
216: sub end_html {
217: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
218: my $currentstring = '';
219: if ($target eq 'web' || $target eq 'webgrade') {
220: # end_body takes care of the </html>
221: }
222: return $currentstring;
223: }
224:
225: #-- <head> tag (end tag optional)
226: sub start_head {
227: my ($target,$token) = @_;
228: my $currentstring = '';
229: if ($target eq 'web' || $target eq 'webgrade') {
230: &Apache::lonxml::startredirection();
231: }
232: return $currentstring;
233: }
234:
235: sub end_head {
236: my ($target,$token) = @_;
237: my $currentstring = '';
238: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
239: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
240: # in case there is a </head> but no <head>
241: if ($Apache::lonxml::redirection) {
242: $Apache::londefdef::head = &Apache::lonxml::endredirection();
243: }
244: }
245: return $currentstring;
246: }
247:
248: #-- <map> tag (end tag required)
249: sub start_map {
250: my ($target,$token) = @_;
251: my $currentstring = '';
252: if ($target eq 'web' || $target eq 'webgrade') {
253: $currentstring = $token->[4];
254: }
255: return $currentstring;
256: }
257:
258: sub end_map {
259: my ($target,$token) = @_;
260: my $currentstring = '';
261: if ($target eq 'web' || $target eq 'webgrade') {
262: $currentstring = $token->[2];
263: }
264: return $currentstring;
265: }
266:
267: #-- <select> tag (end tag required)
268: sub start_select {
269: my ($target,$token) = @_;
270: my $currentstring = '';
271: if ($target eq 'web' || $target eq 'webgrade') {
272: $currentstring = $token->[4];
273: } elsif ($target eq 'tex') {
274: $Apache::londefdef::select=0;
275: }
276: return $currentstring;
277: }
278:
279: sub end_select {
280: my ($target,$token) = @_;
281: my $currentstring = '';
282: if ($target eq 'web' || $target eq 'webgrade') {
283: $currentstring = $token->[2];
284: }
285: return $currentstring;
286: }
287:
288: #-- <option> tag (end tag optional)
289: sub start_option {
290: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
291: my $currentstring = '';
292: if ($target eq 'web' || $target eq 'webgrade') {
293: $currentstring = $token->[4];
294: } elsif ($target eq 'tex') {
295: $Apache::londefdef::select++;
296: if ($Apache::londefdef::select == 1) {
297: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
298: } else {
299: $currentstring='\keephidden{';
300: }
301: }
302: return $currentstring;
303: }
304:
305: sub end_option {
306: my ($target,$token) = @_;
307: my $currentstring = '';
308: if ($target eq 'web' || $target eq 'webgrade') {
309: $currentstring = $token->[2];
310: } elsif ($target eq 'tex') {
311: $currentstring='}';
312: }
313: return $currentstring;
314: }
315:
316: #-- <input> tag (end tag forbidden)
317: sub start_input {
318: my ($target,$token) = @_;
319: my $currentstring = '';
320: if ($target eq 'web' || $target eq 'webgrade') {
321: $currentstring = $token->[4];
322: }
323: return $currentstring;
324: }
325:
326: sub end_input {
327: my ($target,$token) = @_;
328: my $currentstring = '';
329: if ($target eq 'web' || $target eq 'webgrade') {
330: $currentstring = $token->[2];
331: }
332: return $currentstring;
333: }
334:
335: #-- <textarea> tag (end tag required)
336: sub start_textarea {
337: my ($target,$token) = @_;
338: my $currentstring = '';
339: if ($target eq 'web' || $target eq 'webgrade') {
340: $currentstring = $token->[4];
341: }
342: return $currentstring;
343: }
344:
345: sub end_textarea {
346: my ($target,$token) = @_;
347: my $currentstring = '';
348: if ($target eq 'web' || $target eq 'webgrade') {
349: $currentstring = $token->[2];
350: }
351: return $currentstring;
352: }
353:
354: #-- <form> tag (end tag required)
355: sub start_form {
356: my ($target,$token) = @_;
357: my $currentstring = '';
358: if ($target eq 'web' || $target eq 'webgrade') {
359: $currentstring = $token->[4];
360: }
361: return $currentstring;
362: }
363:
364: sub end_form {
365: my ($target,$token) = @_;
366: my $currentstring = '';
367: if ($target eq 'web' || $target eq 'webgrade') {
368: $currentstring = $token->[2];
369: }
370: return $currentstring;
371: }
372:
373: #-- <title> tag (end tag required)
374: sub start_title {
375: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
376: my $currentstring = '';
377: if ($target eq 'web' || $target eq 'webgrade') {
378: $Apache::londefdef::title =
379: &Apache::lonxml::get_all_text('/title',$parser,$style);
380: } elsif ($target eq 'tex') {
381: $currentstring .= '\keephidden{Title of the document: '
382: }
383: if ($target eq 'meta') {
384: $currentstring='<title>';
385: &start_output($target);
386: }
387: return $currentstring;
388: }
389:
390: sub end_title {
391: my ($target,$token) = @_;
392: my $currentstring = '';
393: if ($target eq 'web' || $target eq 'webgrade') {
394: # start_title takes care of swallowing the title
395: } elsif ($target eq 'tex') {
396: $currentstring .= '}';
397: }
398: if ($target eq 'meta') {
399: &end_output($target);
400: $currentstring='</title>';
401: }
402: return $currentstring;
403: }
404:
405: #-- <meta> tag (end tag forbidden)
406: sub start_meta {
407: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
408: my $currentstring = '';
409: if ($target eq 'web' || $target eq 'webgrade') {
410: my $args='';
411: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
412: if ($args eq '') {
413: &Apache::lonxml::get_all_text("/meta",$parser,$style);
414: } else {
415: $currentstring = $token->[4];
416: }
417: } elsif ($target eq 'meta') {
418: unless (&Apache::lonxml::get_param
419: ('http-equiv',$parstack,$safeeval,undef,1)) {
420: my $name=$token->[2]->{'name'};
421: $name=~tr/A-Z/a-z/;
422: $name=~s/\s/\_/gs;
423: $name=~s/\W//gs;
424: if ($name) {
425: $currentstring='<'.$name;
426: my $display=&Apache::lonxml::get_param
427: ('display',$parstack,$safeeval,undef,1);
428: if ($display) {
429: $display=~s/\"/\'/g;
430: $currentstring.=' display="'.$display.'"';
431: }
432: $currentstring.='>'.
433: &Apache::lonxml::get_param
434: ('content',$parstack,$safeeval,undef,1).
435: '</'.$name.'>';
436: }
437: my $display=&Apache::lonxml::get_param
438: ('display',$parstack,$safeeval,undef,1);
439: if ($display) {
440: $display=&HTML::Entities::encode($display,'<>&"');
441: $currentstring.='<'.$name.'.display>'.$display.
442: '</'.$name.'.display>';
443: }
444: }
445: } elsif ($target eq 'tex') {
446: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
447: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
448: if ((not defined $content) && (not defined $name)) {
449: &Apache::lonxml::startredirection();
450: }
451: } elsif ($target eq 'edit') {
452: $currentstring .= &Apache::edit::tag_start($target,$token);
453: $currentstring .= &Apache::edit::text_arg('Name:','name',$token,30);
454: $currentstring .= &Apache::edit::text_arg('Content:','content',$token,70);
455: $currentstring .= &Apache::edit::end_row();
456: } elsif ($target eq 'modified') {
457: my $constructtag =
458: &Apache::edit::get_new_args($token,$parstack,$safeeval,
459: 'name','content');
460: if ($constructtag) { $currentstring = &Apache::edit::rebuild_tag($token); }
461: }
462: return $currentstring;
463: }
464:
465: sub end_meta {
466: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
467: my $currentstring = '';
468: if ($target eq 'web' || $target eq 'webgrade') {
469: my $args='';
470: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
471: if ($args ne '') {
472: $currentstring = $token->[4];
473: }
474: } elsif ($target eq 'tex') {
475: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
476: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
477: if ((not defined $content) && (not defined $name)) {
478: &Apache::lonxml::endredirection();
479: }
480: }
481: return $currentstring;
482: }
483:
484: sub insert_meta {
485: return '
486: <meta />';
487: }
488:
489: # accessrule
490: sub start_accessrule {
491: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
492: my $currentstring = '';
493: my $eff =&Apache::lonxml::get_param('effect',$parstack,$safeeval,undef,1);
494: my $realm=&Apache::lonxml::get_param('realm', $parstack,$safeeval,undef,1);
495: my $role =&Apache::lonxml::get_param('role', $parstack,$safeeval,undef,1);
496: my $type =&Apache::lonxml::get_param('type', $parstack,$safeeval,undef,1);
497:
498: my ($dom,$crs,$sec,$separator);
499: if ($type eq 'user') {
500: ($dom,$crs,$sec)=split(m{/},$realm);
501: $crs = &LONCAPA::clean_username($crs);
502: $separator = '/';
503: } else {
504: ($dom,$crs,$sec)=split(/\_/,$realm);
505: $crs = &LONCAPA::clean_courseid($crs);
506: $separator = '_';
507: }
508: $dom = &LONCAPA::clean_domain($dom);
509:
510: $sec =~s/\W//;
511: $realm = $dom;
512: if ($crs =~ /\S/) { $realm .= $separator.$crs; }
513: if ($sec =~ /\S/) { $realm .= $separator.$sec; }
514: $role=~s/\W//g;
515:
516: if ($target eq 'web') {
517: my $args='';
518: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
519: if ($args eq '') {
520: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
521: } else {
522: $currentstring = $token->[4];
523: }
524: }
525: if ($target eq 'meta') {
526: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
527: }
528: return $currentstring;
529: }
530:
531: sub end_accessrule {
532: my ($target,$token,$tagstack,$parstack,$parser) = @_;
533: my $currentstring = '';
534: if ($target eq 'web') {
535: my $args='';
536: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
537: if ($args ne '') {
538: $currentstring = $token->[4];
539: }
540: }
541: return $currentstring;
542: }
543:
544: sub generate_css_links {
545: my $links;
546: my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
547: if ($css_href =~ /\S/) {
548: &Apache::lonxml::extlink($css_href);
549: $links .=
550: '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
551: }
552: return $links;
553: }
554:
555: #-- <body> tag (end tag required)
556: sub start_body {
557: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
558: my $currentstring = '';
559:
560: if ($target eq 'web' || $target eq 'webgrade') {
561: if ($Apache::lonhomework::parsing_a_problem) {
562: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
563: return '';
564: }
565:
566: if (&is_inside_of($tagstack, "head")) {
567: &end_head(@_);
568: }
569:
570: my $extra_head = &generate_css_links();
571:
572: $currentstring =
573: &Apache::loncommon::start_page($Apache::londefdef::title,
574: $Apache::londefdef::head
575: .$extra_head,
576: {'add_entries' => $token->[2],
577: 'no_title' => 1,
578: 'force_register' => 1});
579:
580: if ($env{'request.state'} ne 'published') {
581: $currentstring.=&Apache::lonmenu::constspaceform();
582: $currentstring.=&Apache::londefdef::edit_controls();
583: }
584: $currentstring.=&Apache::lonxml::message_location();
585: } elsif ($target eq 'tex') {
586: $currentstring = '\begin{document}';
587: }
588: return $currentstring;
589: }
590:
591: sub edit_controls {
592: my $result .= (<<EDITBUTTON);
593: <form method="post">
594: <input type="submit" name="editmode" accesskey="e" value="Edit" />
595: </form>
596: <br />
597: EDITBUTTON
598: return $result;
599: }
600:
601: sub end_body {
602: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
603: my $currentstring = &end_p(); # Close off unclosed <p>
604: if ($target eq 'web' || $target eq 'webgrade') {
605: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
606: } elsif ($target eq 'tex') {
607: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
608: }
609: return $currentstring;
610: }
611:
612: # \begin{center} causes a new paragprah spacing that looks odd inside
613: # of a table cell. Same at the end of a \center but with a slightly
614: # larger space .. hence center_correction and center_end_correction.
615: #
616: sub center_correction { return '\vspace*{-6 mm}'; }
617: sub center_end_correction { return '\vspace*{-7 mm}'; }
618:
619: #-- <center> tag (end tag required)
620: sub start_center {
621: my ($target,$token,$tagstack) = @_;
622: my $currentstring = &end_p(); # Close off any prior para.
623: if ($target eq 'web' || $target eq 'webgrade') {
624: $currentstring .= $token->[4];
625: } elsif ($target eq 'tex') {
626: if (&is_inside_of($tagstack, "table")) {
627: $currentstring .= ¢er_correction();
628: }
629: $currentstring .= '\begin{center}';
630: }
631: return $currentstring;
632: }
633:
634: sub end_center {
635: my ($target,$token,$tagstack) = @_;
636: my $currentstring = '';
637: if ($target eq 'web' || $target eq 'webgrade') {
638: $currentstring = $token->[2];
639: } elsif ($target eq 'tex') {
640: $currentstring = '\end{center}';
641: if (&is_inside_of($tagstack, "table")) {
642: $currentstring .= ¢er_end_correction();
643: }
644: }
645: return $currentstring;
646: }
647:
648: #-- <b> tag (end tag required)
649: # NOTE: In TeX mode disables internal <p>
650: sub start_b {
651: my ($target,$token) = @_;
652: my $currentstring = '';
653: if ($target eq 'web' || $target eq 'webgrade') {
654: $currentstring = $token->[4];
655: } elsif ($target eq 'tex') {
656: &disable_para();
657: $currentstring .= '\textbf{';
658: }
659: return $currentstring;
660: }
661:
662: sub end_b {
663: my ($target,$token) = @_;
664: my $currentstring = '';
665: if ($target eq 'web' || $target eq 'webgrade') {
666: $currentstring = $token->[2];
667: } elsif ($target eq 'tex') {
668: &enable_para();
669: $currentstring = '}';
670: }
671: return $currentstring;
672: }
673:
674: #-- <strong> tag (end tag required)
675: # NOTE: in TeX mode disables internal <p>
676: sub start_strong {
677: my ($target,$token) = @_;
678: my $currentstring = '';
679: if ($target eq 'web' || $target eq 'webgrade') {
680: $currentstring = $token->[4];
681: } elsif ($target eq 'tex') {
682: &disable_para();
683: $currentstring = '\textbf{';
684: }
685: return $currentstring;
686: }
687:
688: sub end_strong {
689: my ($target,$token) = @_;
690: my $currentstring = '';
691: if ($target eq 'web' || $target eq 'webgrade') {
692: $currentstring = $token->[2];
693: } elsif ($target eq 'tex') {
694: &enable_para();
695: $currentstring = '}';
696: }
697: return $currentstring;
698: }
699:
700: #-- <h1> tag (end tag required)
701: sub start_h1 {
702: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
703: my $currentstring = &end_p(); # Close off any prior para.
704: if ($target eq 'web' || $target eq 'webgrade') {
705: $currentstring .= $token->[4];
706: } elsif ($target eq 'tex') {
707: my $pre;
708: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
709: if ($align eq 'center') {
710: $pre='\begin{center}';
711: } elsif ($align eq 'left') {
712: $pre='\rlap{';
713: } elsif ($align eq 'right') {
714: $pre=' \hfill \llap{';
715: }
716: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
717: if (not defined $TeXsize) {$TeXsize="large";}
718: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
719: } elsif ($target eq 'meta') {
720: $currentstring.='<subject>';
721: &start_output($target);
722: }
723: return $currentstring;
724: }
725:
726: sub end_h1 {
727: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
728: my $currentstring = '';
729: if ($target eq 'web' || $target eq 'webgrade') {
730: $currentstring .= $token->[2];
731: } elsif ($target eq 'tex') {
732: my $post='\vskip 0 mm ';
733: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
734: if ($align eq 'center') {
735: $post='\end{center}';
736: } elsif ($align eq 'left') {
737: $post='} \hfill'.'\vskip 0 mm ';
738: } elsif ($align eq 'right') {
739: $post='}'.'\vskip 0 mm ';
740: }
741: $currentstring .= '}}'.$post;
742: } elsif ($target eq 'meta') {
743: &end_output($target);
744: $currentstring='</subject>';
745: }
746: return $currentstring;
747: }
748:
749: #-- <h2> tag
750: sub start_h2 {
751: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
752: my $currentstring = &end_p(); # Close off any prior para.
753: if ($target eq 'web' || $target eq 'webgrade') {
754: $currentstring .= $token->[4];
755: } elsif ($target eq 'tex') {
756: my $pre;
757: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
758: if ($align eq 'center') {
759: $pre='\begin{center}';
760: } elsif ($align eq 'left') {
761: $pre='\rlap{';
762: } elsif ($align eq 'right') {
763: $pre=' \hfill \llap{';
764: }
765: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
766: if (not defined $TeXsize) {$TeXsize="large";}
767: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
768: }
769: return $currentstring;
770: }
771:
772: sub end_h2 {
773: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
774: my $currentstring = '';
775: if ($target eq 'web' || $target eq 'webgrade') {
776: $currentstring .= $token->[2];
777: } elsif ($target eq 'tex') {
778: my $post='\vskip 0 mm ';
779: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
780: if ($align eq 'center') {
781: $post='\end{center}';
782: } elsif ($align eq 'left') {
783: $post='} \hfill'.'\vskip 0 mm ';
784: } elsif ($align eq 'right') {
785: $post='}'.'\vskip 0 mm ';
786: }
787: $currentstring .= '}}'.$post;
788: }
789: return $currentstring;
790: }
791:
792: #-- <h3> tag
793: sub start_h3 {
794: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
795: my $currentstring = &end_p(); # Close off any prior para.
796: if ($target eq 'web' || $target eq 'webgrade') {
797: $currentstring .= $token->[4];
798: } elsif ($target eq 'tex') {
799: my $pre;
800: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
801: if ($align eq 'center') {
802: $pre='\begin{center}';
803: } elsif ($align eq 'left') {
804: $pre='\rlap{';
805: } elsif ($align eq 'right') {
806: $pre=' \hfill \llap{';
807: }
808: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
809: if (not defined $TeXsize) {$TeXsize="large";}
810: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
811: }
812: return $currentstring;
813: }
814:
815: sub end_h3 {
816: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
817: my $currentstring = '';
818: if ($target eq 'web' || $target eq 'webgrade') {
819: $currentstring .= $token->[2];
820: } elsif ($target eq 'tex') {
821: my $post='\vskip 0 mm ';
822: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
823: if ($align eq 'center') {
824: $post='\end{center}';
825: } elsif ($align eq 'left') {
826: $post='} \hfill'.'\vskip 0 mm ';
827: } elsif ($align eq 'right') {
828: $post='}'.'\vskip 0 mm ';
829: }
830: $currentstring .= '}}'.$post;
831: }
832: return $currentstring;
833: }
834:
835: #-- <h4> tag
836: sub start_h4 {
837: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
838: my $currentstring = &end_p(); # Close off any prior para.
839: if ($target eq 'web' || $target eq 'webgrade') {
840: $currentstring .= $token->[4];
841: } elsif ($target eq 'tex') {
842: my $pre;
843: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
844: if ($align eq 'center') {
845: $pre='\begin{center}';
846: } elsif ($align eq 'left') {
847: $pre='\rlap{';
848: } elsif ($align eq 'right') {
849: $pre=' \hfill \llap{';
850: }
851: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
852: if (not defined $TeXsize) {$TeXsize="large";}
853: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
854: }
855: return $currentstring;
856: }
857:
858: sub end_h4 {
859: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
860: my $currentstring = '';
861: if ($target eq 'web' || $target eq 'webgrade') {
862: $currentstring .= $token->[2];
863: } elsif ($target eq 'tex') {
864: my $post='\vskip 0 mm ';
865: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
866: if ($align eq 'center') {
867: $post='\end{center}';
868: } elsif ($align eq 'left') {
869: $post='} \hfill'.'\vskip 0 mm ';
870: } elsif ($align eq 'right') {
871: $post='}'.'\vskip 0 mm ';
872: }
873: $currentstring .= '}}'.$post;
874: }
875: return $currentstring;
876: }
877:
878: #-- <h5> tag
879: sub start_h5 {
880: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
881: my $currentstring = &end_p(); # Close off any prior paras.
882: if ($target eq 'web' || $target eq 'webgrade') {
883: $currentstring .= $token->[4];
884: } elsif ($target eq 'tex') {
885: my $pre;
886: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
887: if ($align eq 'center') {
888: $pre='\begin{center}';
889: } elsif ($align eq 'left') {
890: $pre='\rlap{';
891: } elsif ($align eq 'right') {
892: $pre=' \hfill \llap{';
893: }
894: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
895: if (not defined $TeXsize) {$TeXsize="large";}
896: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
897: }
898: return $currentstring;
899: }
900:
901: sub end_h5 {
902: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
903: my $currentstring = '';
904: if ($target eq 'web' || $target eq 'webgrade') {
905: $currentstring .= $token->[2];
906: } elsif ($target eq 'tex') {
907: my $post='\vskip 0 mm ';
908: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
909: if ($align eq 'center') {
910: $post='\end{center}';
911: } elsif ($align eq 'left') {
912: $post='} \hfill'.'\vskip 0 mm ';
913: } elsif ($align eq 'right') {
914: $post='}'.'\vskip 0 mm ';
915: }
916: $currentstring .= '}}'.$post;
917: }
918: return $currentstring;
919: }
920:
921: #-- <h6> tag
922: sub start_h6 {
923: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
924: my $currentstring = &end_p(); # Close off any prior paras.
925: if ($target eq 'web' || $target eq 'webgrade') {
926: $currentstring .= $token->[4];
927: } elsif ($target eq 'tex') {
928: my $pre;
929: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
930: if ($align eq 'center') {
931: $pre='\begin{center}';
932: } elsif ($align eq 'left') {
933: $pre='\rlap{';
934: } elsif ($align eq 'right') {
935: $pre=' \hfill \llap{';
936: }
937: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
938: if (not defined $TeXsize) {$TeXsize="large";}
939: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
940: }
941: return $currentstring;
942: }
943:
944: sub end_h6 {
945: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
946: my $currentstring = '';
947: if ($target eq 'web' || $target eq 'webgrade') {
948: $currentstring .= $token->[2];
949: } elsif ($target eq 'tex') {
950: my $post='\vskip 0 mm ';
951: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
952: if ($align eq 'center') {
953: $post='\end{center}';
954: } elsif ($align eq 'left') {
955: $post='} \hfill'.'\vskip 0 mm ';
956: } elsif ($align eq 'right') {
957: $post='}'.'\vskip 0 mm ';
958: }
959: $currentstring .= '}}'.$post;
960: }
961: return $currentstring;
962: }
963:
964: #--- <cite> tag (end tag required)
965: sub start_cite {
966: my ($target,$token) = @_;
967: my $currentstring = '';
968: if ($target eq 'web' || $target eq 'webgrade') {
969: $currentstring .= $token->[4];
970: } elsif ($target eq 'tex') {
971: $currentstring .= '\textit{';
972: }
973: return $currentstring;
974: }
975:
976: sub end_cite {
977: my ($target,$token) = @_;
978: my $currentstring = '';
979: if ($target eq 'web' || $target eq 'webgrade') {
980: $currentstring .= $token->[2];
981: } elsif ($target eq 'tex') {
982: $currentstring .= '}';
983: }
984: return $currentstring;
985: }
986:
987: #-- <i> tag (end tag required)
988: sub start_i {
989: my ($target,$token) = @_;
990: my $currentstring = '';
991: if ($target eq 'web' || $target eq 'webgrade') {
992: $currentstring .= $token->[4];
993: } elsif ($target eq 'tex') {
994: $currentstring .= '\textit{';
995: }
996: return $currentstring;
997: }
998:
999: sub end_i {
1000: my ($target,$token) = @_;
1001: my $currentstring = '';
1002: if ($target eq 'web' || $target eq 'webgrade') {
1003: $currentstring .= $token->[2];
1004: } elsif ($target eq 'tex') {
1005: $currentstring .= '}';
1006: }
1007: return $currentstring;
1008: }
1009:
1010: #-- <address> tag (end tag required)
1011: sub start_address {
1012: my ($target,$token) = @_;
1013: my $currentstring = '';
1014: if ($target eq 'web' || $target eq 'webgrade') {
1015: $currentstring .= $token->[4];
1016: } elsif ($target eq 'tex') {
1017: $currentstring .= '\textit{';
1018: }
1019: return $currentstring;
1020: }
1021:
1022: sub end_address {
1023: my ($target,$token) = @_;
1024: my $currentstring = '';
1025: if ($target eq 'web' || $target eq 'webgrade') {
1026: $currentstring .= $token->[2];
1027: } elsif ($target eq 'tex') {
1028: $currentstring .= '}';
1029: }
1030: return $currentstring;
1031: }
1032:
1033: #-- <dfn> tag (end tag required)
1034: sub start_dfn {
1035: my ($target,$token) = @_;
1036: my $currentstring = '';
1037: if ($target eq 'web' || $target eq 'webgrade') {
1038: $currentstring .= $token->[4];
1039: } elsif ($target eq 'tex') {
1040: $currentstring .= '\textit{';
1041: }
1042: return $currentstring;
1043: }
1044:
1045: sub end_dfn {
1046: my ($target,$token) = @_;
1047: my $currentstring = '';
1048: if ($target eq 'web' || $target eq 'webgrade') {
1049: $currentstring .= $token->[2];
1050: } elsif ($target eq 'tex') {
1051: $currentstring .= '}';
1052: }
1053: return $currentstring;
1054: }
1055:
1056: #-- <tt> tag (end tag required)
1057: sub start_tt {
1058: my ($target,$token) = @_;
1059: my $currentstring = '';
1060: if ($target eq 'web' || $target eq 'webgrade') {
1061: $currentstring .= $token->[4];
1062: } elsif ($target eq 'tex') {
1063: $currentstring .= '\texttt{';
1064: }
1065: return $currentstring;
1066: }
1067:
1068: sub end_tt {
1069: my ($target,$token) = @_;
1070: my $currentstring = '';
1071: if ($target eq 'web' || $target eq 'webgrade') {
1072: $currentstring .= $token->[2];
1073: } elsif ($target eq 'tex') {
1074: $currentstring .= '}';
1075: }
1076: return $currentstring;
1077: }
1078:
1079: #-- <kbd> tag (end tag required)
1080: sub start_kbd {
1081: my ($target,$token) = @_;
1082: my $currentstring = '';
1083: if ($target eq 'web' || $target eq 'webgrade') {
1084: $currentstring .= $token->[4];
1085: } elsif ($target eq 'tex') {
1086: $currentstring .= '\texttt{';
1087: }
1088: return $currentstring;
1089: }
1090:
1091: sub end_kbd {
1092: my ($target,$token) = @_;
1093: my $currentstring = '';
1094: if ($target eq 'web' || $target eq 'webgrade') {
1095: $currentstring .= $token->[2];
1096: } elsif ($target eq 'tex') {
1097: $currentstring .= '}';
1098: }
1099: return $currentstring;
1100: }
1101:
1102: #-- <code> tag (end tag required)
1103: sub start_code {
1104: my ($target,$token) = @_;
1105: my $currentstring = '';
1106: if ($target eq 'web' || $target eq 'webgrade') {
1107: $currentstring .= $token->[4];
1108: } elsif ($target eq 'tex') {
1109: $currentstring .= '\texttt{';
1110: }
1111: return $currentstring;
1112: }
1113:
1114: sub end_code {
1115: my ($target,$token) = @_;
1116: my $currentstring = '';
1117: if ($target eq 'web' || $target eq 'webgrade') {
1118: $currentstring .= $token->[2];
1119: } elsif ($target eq 'tex') {
1120: $currentstring .= '}';
1121: }
1122: return $currentstring;
1123: }
1124:
1125: #-- <em> tag (end tag required)
1126: sub start_em {
1127: my ($target,$token) = @_;
1128: my $currentstring = '';
1129: if ($target eq 'web' || $target eq 'webgrade') {
1130: $currentstring .= $token->[4];
1131: } elsif ($target eq 'tex') {
1132: $currentstring .= '\emph{';
1133: }
1134: return $currentstring;
1135: }
1136:
1137: sub end_em {
1138: my ($target,$token) = @_;
1139: my $currentstring = '';
1140: if ($target eq 'web' || $target eq 'webgrade') {
1141: $currentstring .= $token->[2];
1142: } elsif ($target eq 'tex') {
1143: $currentstring .= '}';
1144: }
1145: return $currentstring;
1146: }
1147:
1148: #-- <q> tag (end tag required)
1149: sub start_q {
1150: my ($target,$token) = @_;
1151: my $currentstring = '';
1152: if ($target eq 'web' || $target eq 'webgrade') {
1153: $currentstring .= $token->[4];
1154: } elsif ($target eq 'tex') {
1155: $currentstring .= '\emph{';
1156: }
1157: return $currentstring;
1158: }
1159:
1160: sub end_q {
1161: my ($target,$token) = @_;
1162: my $currentstring = '';
1163: if ($target eq 'web' || $target eq 'webgrade') {
1164: $currentstring .= $token->[2];
1165: } elsif ($target eq 'tex') {
1166: $currentstring .= '}';
1167: }
1168: return $currentstring;
1169: }
1170:
1171: # <p> is a bit strange since it does not require a closing </p>
1172: # However in latex, we must often output closing stuff to end
1173: # environments and {}'s etc. Therefore we do all the work
1174: # of figuring out the ending strings in the start tag processing,
1175: # and provide a mechanism to output the stop text external
1176: # to tag processing.
1177: #
1178: {
1179:
1180: my $closing_string = ''; # String required to close <p>
1181:
1182: # Some tags are <p> fragile meaning that <p> inside of them
1183: # does not work within TeX mode. This is managed via the
1184: # counter below:
1185: #
1186:
1187: my $para_disabled = 0;
1188:
1189: sub disable_para {
1190: $para_disabled++;
1191: }
1192: sub enable_para {
1193: $para_disabled--;
1194: }
1195:
1196:
1197: #-- <p> tag (end tag optional)
1198: #optional attribute - align="center|left|right"
1199: sub start_p {
1200: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1201: my $currentstring = '';
1202: if ($target eq 'web' || $target eq 'webgrade') {
1203: $currentstring .= &end_p(); # close off prior para if in progress.
1204: $currentstring .= $token->[4];
1205: if (! ($currentstring =~ /\//)) {
1206: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1207: }
1208: } elsif ($target eq 'tex' && !$para_disabled) {
1209:
1210: $currentstring .= &end_p(); # close off prior para if in progress.
1211: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1212: if ($align eq 'center') {
1213: $currentstring .='\begin{center}\par ';
1214: $closing_string = '\end{center}';
1215: if (&is_inside_of($tagstack, "table")) {
1216: $currentstring = ¢er_correction().$currentstring;
1217: }
1218: } elsif ($align eq 'right') {
1219: $currentstring.="\n".'{\flushright ';
1220: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1221: $closing_string= "}\n";
1222: } elsif ($align eq 'left') {
1223: $currentstring.= "\n".'{\flushleft ';
1224: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1225: $closing_string = "}\n";
1226: } else {
1227: $currentstring.='\par ';
1228: if (&is_inside_of($tagstack, 'table')) {
1229: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1230: } else {
1231: $closing_string = '\strut\\\\\strut ';
1232: }
1233: }
1234:
1235: }
1236: return $currentstring;
1237: }
1238: #
1239: # End paragraph processing just requires that we output the
1240: # closing string that was saved and blank it.
1241: sub end_p {
1242: # Note only 'tex' mode uses disable_para and enable_para
1243: # so we don't need to know the target in the check below:
1244:
1245: if (!$para_disabled) {
1246: my $current_string = $closing_string;
1247: $closing_string = ''; # Not in a para anymore.
1248: return $current_string;
1249: } else {
1250: return '';
1251: }
1252:
1253: }
1254: }
1255: #-- <br> tag (end tag forbidden)
1256: sub start_br {
1257: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1258: my $currentstring = '';
1259: if ($target eq 'web' || $target eq 'webgrade') {
1260: $currentstring .= $token->[4];
1261: } elsif ($target eq 'tex') {
1262: my @tempo=@$tagstack;
1263: my $signal=0;
1264: # Not going to factor this to is_inside_of since that would require
1265: # multiple stack traversals.
1266: #
1267: for (my $i=$#tempo;$i>=0;$i--) {
1268: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1269: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1270: $signal=1;
1271: }
1272: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1273: $signal = 1;
1274: }
1275: }
1276: if ($signal != 1) {
1277: $currentstring .= '\strut \\\\ \strut ';
1278: }
1279:
1280: }
1281: return $currentstring;
1282: }
1283:
1284: sub end_br {
1285: my ($target,$token) = @_;
1286: my $currentstring = '';
1287: if ($target eq 'web' || $target eq 'webgrade') {
1288: $currentstring .= $token->[2];
1289: }
1290: return $currentstring;
1291: }
1292:
1293: #-- <big> tag (end tag required)
1294: sub start_big {
1295: my ($target,$token) = @_;
1296: my $currentstring = '';
1297: if ($target eq 'web' || $target eq 'webgrade') {
1298: $currentstring .= $token->[4];
1299: } elsif ($target eq 'tex') {
1300: $currentstring .= '{\large ';
1301: }
1302: return $currentstring;
1303: }
1304:
1305: sub end_big {
1306: my ($target,$token) = @_;
1307: my $currentstring = '';
1308: if ($target eq 'web' || $target eq 'webgrade') {
1309: $currentstring .= $token->[2];
1310: } elsif ($target eq 'tex') {
1311: $currentstring .= '}';
1312: }
1313: return $currentstring;
1314: }
1315:
1316: #-- <small> tag (end tag required)
1317: sub start_small {
1318: my ($target,$token) = @_;
1319: my $currentstring = '';
1320: if ($target eq 'web' || $target eq 'webgrade') {
1321: $currentstring .= $token->[4];
1322: } elsif ($target eq 'tex') {
1323: $currentstring .= '{\footnotesize ';
1324: }
1325: return $currentstring;
1326: }
1327:
1328: sub end_small {
1329: my ($target,$token) = @_;
1330: my $currentstring = '';
1331: if ($target eq 'web' || $target eq 'webgrade') {
1332: $currentstring .= $token->[2];
1333: } elsif ($target eq 'tex') {
1334: $currentstring .= '}';
1335: }
1336: return $currentstring;
1337: }
1338:
1339: #-- <basefont> tag (end tag forbidden)
1340: sub start_basefont {
1341: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1342: my $currentstring = '';
1343: if ($target eq 'web' || $target eq 'webgrade') {
1344: $currentstring = $token->[4];
1345: } elsif ($target eq 'tex') {
1346: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1347: if (defined $basesize) {
1348: $currentstring = '{\\'.$basesize.' ';
1349: }
1350: }
1351: return $currentstring;
1352: }
1353:
1354: sub end_basefont {
1355: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1356: my $currentstring = '';
1357: if ($target eq 'web' || $target eq 'webgrade') {
1358: $currentstring = $token->[4];
1359: } elsif ($target eq 'tex') {
1360: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1361: if (defined $basesize) {
1362: $currentstring = '}';
1363: }
1364: }
1365: return $currentstring;
1366: }
1367:
1368: #-- <font> tag (end tag required)
1369: sub start_font {
1370: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1371: my $currentstring = '';
1372: if ($target eq 'web' || $target eq 'webgrade') {
1373: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1374: if ($face!~/symbol/i) {
1375: if (($env{'browser.fontenhance'} eq 'on') ||
1376: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1377: }
1378: $currentstring = $token->[4];
1379: } elsif ($target eq 'tex') {
1380: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1381: if (defined $fontsize) {
1382: $currentstring = '{\\'.$fontsize.' ';
1383: }
1384: }
1385: return $currentstring;
1386: }
1387:
1388: sub end_font {
1389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1390: my $currentstring = '';
1391: if ($target eq 'web' || $target eq 'webgrade') {
1392: $currentstring = $token->[2];
1393: } elsif ($target eq 'tex') {
1394: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1395: if (defined $fontsize) {
1396: $currentstring = '}';
1397: }
1398: }
1399: return $currentstring;
1400: }
1401:
1402: #-- <strike> tag (end tag required)
1403: sub start_strike {
1404: my ($target,$token) = @_;
1405: my $currentstring = '';
1406: if ($target eq 'web' || $target eq 'webgrade') {
1407: $currentstring .= $token->[4];
1408: } elsif ($target eq 'tex') {
1409: &Apache::lonxml::startredirection();
1410: }
1411: return $currentstring;
1412: }
1413:
1414: sub end_strike {
1415: my ($target,$token) = @_;
1416: my $currentstring = '';
1417: if ($target eq 'web' || $target eq 'webgrade') {
1418: $currentstring .= $token->[2];
1419: } elsif ($target eq 'tex') {
1420: $currentstring=&Apache::lonxml::endredirection();
1421: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1422: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1423: $currentstring=~s/(\S)\s*$/$1\}/;
1424: }
1425: return $currentstring;
1426: }
1427:
1428: #-- <s> tag (end tag required)
1429: sub start_s {
1430: my ($target,$token) = @_;
1431: my $currentstring = '';
1432: if ($target eq 'web' || $target eq 'webgrade') {
1433: $currentstring .= $token->[4];
1434: } elsif ($target eq 'tex') {
1435: &Apache::lonxml::startredirection();
1436: }
1437: return $currentstring;
1438: }
1439:
1440: sub end_s {
1441: my ($target,$token) = @_;
1442: my $currentstring = '';
1443: if ($target eq 'web' || $target eq 'webgrade') {
1444: $currentstring .= $token->[2];
1445: } elsif ($target eq 'tex') {
1446: $currentstring=&Apache::lonxml::endredirection();
1447: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1448: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1449: $currentstring=~s/(\S)\s*$/$1\}/;
1450: }
1451: return $currentstring;
1452: }
1453:
1454: #-- <sub> tag (end tag required)
1455: sub start_sub {
1456: my ($target,$token) = @_;
1457: my $currentstring = '';
1458: if ($target eq 'web' || $target eq 'webgrade') {
1459: $currentstring .= $token->[4];
1460: } elsif ($target eq 'tex') {
1461: $currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1462: }
1463: return $currentstring;
1464: }
1465:
1466: sub end_sub {
1467: my ($target,$token) = @_;
1468: my $currentstring = '';
1469: if ($target eq 'web' || $target eq 'webgrade') {
1470: $currentstring .= $token->[2];
1471: } elsif ($target eq 'tex') {
1472: $currentstring .= '}}';
1473: }
1474: return $currentstring;
1475: }
1476:
1477: #-- <sup> tag (end tag required)
1478: sub start_sup {
1479: my ($target,$token) = @_;
1480: my $currentstring = '';
1481: if ($target eq 'web' || $target eq 'webgrade') {
1482: $currentstring .= $token->[4];
1483: } elsif ($target eq 'tex') {
1484: $currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1485: }
1486: return $currentstring;
1487: }
1488:
1489: sub end_sup {
1490: my ($target,$token) = @_;
1491: my $currentstring = '';
1492: if ($target eq 'web' || $target eq 'webgrade') {
1493: $currentstring .= $token->[2];
1494: } elsif ($target eq 'tex') {
1495: $currentstring .= '}}';
1496: }
1497: return $currentstring;
1498: }
1499:
1500: #-- <hr> tag (end tag forbidden)
1501: sub start_hr {
1502: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1503: my $currentstring = &end_p(); # End enclosing para.
1504: if ($target eq 'web' || $target eq 'webgrade') {
1505: $currentstring .= $token->[4];
1506: } elsif ($target eq 'tex') {
1507:
1508: # <hr /> can't be inside of <sup><sub> thank you LaTeX.
1509: #
1510: my $restart_sub = 0;
1511: my $restart_sup = 0;
1512:
1513: # Since <sub> and <sup> are simple tags it's ok to turn off/on
1514: # using the start_ stop_ functions.. those tags only care about
1515: # $target.
1516:
1517: if (&is_inside_of($tagstack, "sub")) {
1518: $restart_sub = 1;
1519: $currentstring .= &end_sub($target, $token, $tagstack,
1520: $parstack, $parser, $safeeval);
1521: }
1522: if (&is_inside_of($tagstack, "sup")) {
1523: $restart_sup = 1;
1524: $currentstring .= &end_sup($target, $token, $tagstack,
1525: $parstack, $parser, $safeeval);
1526: }
1527:
1528: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1529: if (defined $LaTeXwidth) {
1530: if ($LaTeXwidth=~/^%/) {
1531: substr($LaTeXwidth,0,1)='';
1532: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1533: }
1534: } else {
1535: $LaTeXwidth ='0.9\textwidth';
1536: }
1537: my ($pre,$post);
1538: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1539: if (($align eq 'center') || (not defined $align)) {
1540: $pre=''; $post='';
1541: } elsif ($align eq 'left') {
1542: $pre='\rlap{'; $post='} \hfill';
1543: } elsif ($align eq 'right') {
1544: $pre=' \hfill \llap{'; $post='}';
1545: }
1546: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1547: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1548: # Turn stuff back on that we can't be inside of.
1549:
1550: if ($restart_sub) {
1551: $currentstring .= &start_sub($target, $token, $tagstack,
1552: $parstack, $parser, $safeeval);
1553: }
1554: if ($restart_sup) {
1555: $currentstring .= &start_sup($target, $token, $tagstack,
1556: $parstack, $parser, $safeeval);
1557: }
1558: }
1559: return $currentstring;
1560: }
1561:
1562: sub end_hr {
1563: my ($target,$token) = @_;
1564: my $currentstring = '';
1565: if ($target eq 'web' || $target eq 'webgrade') {
1566: $currentstring .= $token->[2];
1567: }
1568: return $currentstring;
1569: }
1570:
1571: #-- <div> tag (end tag required)
1572: {
1573:
1574: # Since div can be nested, the stack below is used
1575: # in 'tex' mode to store the ending strings
1576: # for the div stack.
1577:
1578: my @div_end_stack;
1579:
1580: sub start_div {
1581: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1582: my $currentstring = &end_p(); # Close enclosing para.
1583: if ($target eq 'web' || $target eq 'webgrade') {
1584: $currentstring .= $token->[4];
1585: }
1586: if ($target eq 'tex') {
1587: # 4 possible alignments: left, right, center, and -missing-.
1588: # If inside a table row, we must let the table logic
1589: # do the alignment, however.
1590: #
1591:
1592: my $endstring = '';
1593:
1594: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1595: $safeeval, undef, 1));
1596: if ($align eq 'center') {
1597: $currentstring .= '\begin{center}';
1598: $endstring = '\end{center}';
1599: if (&is_inside_of($tagstack, "table")) {
1600: $currentstring = ¢er_correction().$currentstring;
1601: $endstring .= ¢er_end_correction();
1602: }
1603: }
1604: elsif ($align eq 'right') {
1605: $currentstring .= '\begin{flushright}';
1606: $endstring .= '\end{flushright}';
1607: } elsif ($align eq 'left') {
1608: $currentstring .= '\begin{flushleft}';
1609: $endstring = '\end{flushleft}';
1610: } else {
1611:
1612: }
1613: $currentstring .= "\n"; # For human readability.
1614: $endstring = "\n$endstring\n"; # For human readability
1615: push(@div_end_stack, $endstring);
1616: }
1617: return $currentstring;
1618: }
1619:
1620: sub end_div {
1621: my ($target,$token) = @_;
1622: my $currentstring = '';
1623: if ($target eq 'web' || $target eq 'webgrade') {
1624: $currentstring .= $token->[2];
1625: }
1626: if ($target eq 'tex') {
1627: my $endstring = pop @div_end_stack;
1628: $currentstring .= $endstring;
1629: }
1630: return $currentstring;
1631: }
1632: }
1633:
1634: #-- <a> tag (end tag required)
1635: sub start_a {
1636: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1637: my $currentstring = '';
1638: if ($target eq 'web' || $target eq 'webgrade') {
1639: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1640: undef,1);
1641: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1642: }
1643: return $currentstring;
1644: }
1645:
1646: sub end_a {
1647: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1648: my $currentstring = '';
1649: if ($target eq 'web' || $target eq 'webgrade') {
1650: $currentstring .= $token->[2];
1651: }
1652: if ($target eq 'tex') {
1653: my $href =
1654: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1655: my $name =
1656: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1657: if ($href =~ /\S/) {
1658: $href =~ s/([^\\])%/$1\\\%/g;
1659: # Substitute special symbols... and allow line breaks at each /
1660: #
1661: $href = &Apache::lonxml::latex_special_symbols($href);
1662: $href =~ s/\//\/\\-/g; # Map / to /\- to allow hyphenation.
1663: $currentstring .= ' ({\tt URI:'.$href.'})';
1664: } elsif ($name =~ /\S/) {
1665: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1666: } else {
1667: $currentstring.='';
1668: }
1669: }
1670: return $currentstring;
1671: }
1672:
1673: #-- <li> tag (end tag optional)
1674: sub start_li {
1675: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1676: my $currentstring = '';
1677: if ($target eq 'web' || $target eq 'webgrade') {
1678: $currentstring = $token->[4];
1679: } elsif ($target eq 'tex') {
1680: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1681: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1682: #FIXME need to support types i and I
1683: if ($type=~/disc/) {
1684: $currentstring .= ' \item[$\bullet$] ';
1685: } elsif ($type=~/circle/) {
1686: $currentstring .= ' \item[$\circ$] ';
1687: } elsif ($type=~/square/) {
1688: $currentstring .= ' \item[$\diamond$] ';
1689: } elsif ($type eq '1') {
1690: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1691: } elsif ($type eq 'A') {
1692: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1693: } elsif ($type eq 'a') {
1694: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1695: } elsif ($value ne '') {
1696: $currentstring .= ' \item['.$value.'] ';
1697: } else {
1698: $currentstring .= ' \item ';
1699: }
1700: $Apache::londefdef::list_index++;
1701: }
1702: return $currentstring;
1703: }
1704:
1705: sub end_li {
1706: my ($target,$token) = @_;
1707: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1708: if ($target eq 'web' || $target eq 'webgrade') {
1709: $currentstring .= $token->[2];
1710: }
1711: return $currentstring;
1712: }
1713:
1714: #-- <u> tag (end tag required)
1715: sub start_u {
1716: my ($target,$token) = @_;
1717: my $currentstring = '';
1718: if ($target eq 'web' || $target eq 'webgrade') {
1719: $currentstring .= $token->[4];
1720: } elsif ($target eq 'tex') {
1721: &Apache::lonxml::startredirection();
1722: }
1723: return $currentstring;
1724: }
1725:
1726: sub end_u {
1727: my ($target,$token) = @_;
1728: my $currentstring = '';
1729: if ($target eq 'web' || $target eq 'webgrade') {
1730: $currentstring .= $token->[2];
1731: } elsif ($target eq 'tex') {
1732: $currentstring=&Apache::lonxml::endredirection();
1733: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1734: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1735: $currentstring=~s/(\S)\s*$/$1\}/;
1736: }
1737: return $currentstring;
1738: }
1739:
1740: #-- <ul> tag (end tag required)
1741: sub start_ul {
1742: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1743: my $currentstring = &end_p(); # Close off enclosing list.
1744: if ($target eq 'web' || $target eq 'webgrade') {
1745: $currentstring .= $token->[4];
1746: } elsif ($target eq 'tex') {
1747: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1748: $Apache::londefdef::list_index=0;
1749: if ($TeXtype eq 'disc') {
1750: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1751: '\renewcommand{\labelitemii}{$\bullet$}'.
1752: '\renewcommand{\labelitemiii}{$\bullet$}'.
1753: '\renewcommand{\labelitemiv}{$\bullet$}';
1754: } elsif ($TeXtype eq 'circle') {
1755: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1756: '\renewcommand{\labelitemii}{$\circ$}'.
1757: '\renewcommand{\labelitemiii}{$\circ$}'.
1758: '\renewcommand{\labelitemiv}{$\circ$}';
1759: } elsif ($TeXtype eq 'square') {
1760: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1761: '\renewcommand{\labelitemii}{$\diamond$}'.
1762: '\renewcommand{\labelitemiii}{$\diamond$}'.
1763: '\renewcommand{\labelitemiv}{$\diamond$}';
1764: }
1765: $currentstring .= '\strut \begin{itemize}';
1766: }
1767: return $currentstring;
1768: }
1769:
1770: sub end_ul {
1771: my ($target,$token) = @_;
1772: my $currentstring = '';
1773: if ($target eq 'web' || $target eq 'webgrade') {
1774: $currentstring = $token->[2];
1775: } elsif ($target eq 'tex') {
1776: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1777: '\renewcommand{\labelitemii}{$\bullet$}'.
1778: '\renewcommand{\labelitemiii}{$\bullet$}'.
1779: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1780: }
1781: return $currentstring;
1782: }
1783:
1784: #-- <menu> tag (end tag required)
1785: sub start_menu {
1786: my ($target,$token) = @_;
1787: my $currentstring = '';
1788: if ($target eq 'web' || $target eq 'webgrade') {
1789: $currentstring = $token->[4];
1790: } elsif ($target eq 'tex') {
1791: $currentstring = " \\begin{itemize} ";
1792: }
1793: return $currentstring;
1794: }
1795:
1796: sub end_menu {
1797: my ($target,$token) = @_;
1798: my $currentstring = '';
1799: if ($target eq 'web' || $target eq 'webgrade') {
1800: $currentstring = $token->[2];
1801: } elsif ($target eq 'tex') {
1802: $currentstring = " \\end{itemize}";
1803: }
1804: return $currentstring;
1805: }
1806:
1807: #-- <dir> tag (end tag required)
1808: sub start_dir {
1809: my ($target,$token) = @_;
1810: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1811: if ($target eq 'web' || $target eq 'webgrade') {
1812: $currentstring .= $token->[4];
1813: } elsif ($target eq 'tex') {
1814: $currentstring .= " \\begin{itemize} ";
1815: }
1816: return $currentstring;
1817: }
1818:
1819: sub end_dir {
1820: my ($target,$token) = @_;
1821: my $currentstring = '';
1822: if ($target eq 'web' || $target eq 'webgrade') {
1823: $currentstring = $token->[2];
1824: } elsif ($target eq 'tex') {
1825: $currentstring = " \\end{itemize}";
1826: }
1827: return $currentstring;
1828: }
1829:
1830: #-- <ol> tag (end tag required)
1831: sub start_ol {
1832: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1833: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1834: if ($target eq 'web' || $target eq 'webgrade') {
1835: $currentstring .= $token->[4];
1836: } elsif ($target eq 'tex') {
1837: $Apache::londefdef::list_index=0;
1838: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1839: if ($type eq '1') {
1840: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1841: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1842: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1843: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1844: } elsif ($type eq 'A') {
1845: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1846: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1847: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1848: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1849: } elsif ($type eq 'a') {
1850: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1851: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1852: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1853: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1854: } elsif ($type eq 'i') {
1855: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1856: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1857: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1858: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1859: } elsif ($type eq 'I') {
1860: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1861: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1862: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1863: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1864: }
1865: $currentstring .= '\strut \begin{enumerate}';
1866: }
1867: return $currentstring;
1868: }
1869:
1870: sub end_ol {
1871: my ($target,$token) = @_;
1872: my $currentstring = '';
1873: if ($target eq 'web' || $target eq 'webgrade') {
1874: $currentstring = $token->[2];
1875: } elsif ($target eq 'tex') {
1876: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1877: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1878: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1879: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1880: }
1881: return $currentstring;
1882: }
1883:
1884: #-- <dl> tag (end tag required)
1885: sub start_dl {
1886: my ($target,$token) = @_;
1887: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1888: if ($target eq 'web' || $target eq 'webgrade') {
1889: $currentstring .= $token->[4];
1890: } elsif ($target eq 'tex') {
1891: $currentstring .= '\begin{description}';
1892: $Apache::londefdef::DL++;
1893: push(@Apache::londefdef::description,[]);
1894: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1895: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1896: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1897: }
1898: return $currentstring;
1899: }
1900:
1901: sub end_dl {
1902: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1903: my $currentstring = '';
1904: if ($target eq 'web' || $target eq 'webgrade') {
1905: $currentstring = $token->[2];
1906: } elsif ($target eq 'tex') {
1907: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1908: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1909: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1910: $currentstring.=' '.$element.' ';
1911: }
1912: pop(@Apache::londefdef::description);
1913: $currentstring.='\end{description}';
1914: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1915: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1916: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1917: $Apache::londefdef::DL--;
1918: }
1919: return $currentstring;
1920: }
1921:
1922: #-- <dt> tag (end tag optional)
1923: sub start_dt {
1924: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1925: my $currentstring='';
1926: if ($target eq 'web' || $target eq 'webgrade') {
1927: $currentstring = $token->[4];
1928: } elsif ($target eq 'tex') {
1929: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1930: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1931: &Apache::lonxml::startredirection();
1932: $Apache::londefdef::DT[-1]++;
1933: $Apache::londefdef::seenDT[-1]=1;
1934: }
1935: return $currentstring;
1936: }
1937:
1938: sub end_dt {
1939: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1940: my $currentstring = '';
1941: if ($target eq 'web' || $target eq 'webgrade') {
1942: $currentstring = $token->[2];
1943: } elsif ($target eq 'tex') {
1944: if ($Apache::londefdef::DT[-1]) {
1945: my $data=&item_cleanup();
1946: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1947: $Apache::londefdef::DT[-1]--;
1948: }
1949: }
1950: return $currentstring;
1951: }
1952:
1953: sub item_cleanup {
1954: my $item=&Apache::lonxml::endredirection();
1955: $item=~s/\\begin{center}//g;
1956: $item=~s/\\end{center}//g;
1957: return $item;
1958: }
1959:
1960: #-- <dd> tag (end tag optional)
1961: sub start_dd {
1962: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1963: my $currentstring = '';
1964: if ($target eq 'web' || $target eq 'webgrade') {
1965: $currentstring = $token->[4];
1966: } elsif ($target eq 'tex') {
1967: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1968: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1969: if (!$Apache::londefdef::seenDT[-1]) {
1970: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1971: }
1972: push(@{$Apache::londefdef::description[-1]},'');
1973: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1974: $Apache::londefdef::DD[-1]++;
1975: &Apache::lonxml::startredirection();
1976: }
1977: return $currentstring;
1978: }
1979:
1980: sub end_dd {
1981: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1982: my $currentstring = '';
1983: if ($target eq 'web' || $target eq 'webgrade') {
1984: $currentstring = $token->[2];
1985: } elsif ($target eq 'tex') {
1986: $Apache::londefdef::description[-1]->[-1].=
1987: &Apache::lonxml::endredirection().' \vskip 0mm ';
1988: $Apache::londefdef::DD[-1]--;
1989: }
1990: return $currentstring;
1991: }
1992:
1993: #-- <table> tag (end tag required)
1994: # <table> also ends any prior <p> that is not closed.
1995: # but, unless I allow <p>'s to nest, that's the
1996: # only way I could think of to allow <p> in
1997: # <tr> <th> bodies
1998: #
1999: #list of supported attributes: border,width,TeXwidth
2000: sub start_table {
2001: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2002: my $textwidth = '';
2003: my $currentstring = &end_p();
2004: if ($target eq 'web' || $target eq 'webgrade') {
2005: $currentstring .= $token->[4];
2006: } elsif ($target eq 'tex') {
2007: push(@Apache::londefdef::table, {});
2008: $Apache::londefdef::table[-1]{'row_number'} = -1;
2009: #maximum table's width (default coincides with text line length)
2010: if ($#Apache::londefdef::table==0) {
2011: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
2012: $textwidth=~/(\d+\.?\d*)/;
2013: $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
2014: } else {
2015: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
2016: #the maximum width of nested table is determined by LATeX width of parent cell
2017: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
2018: } else {
2019: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
2020: $textwidth=$Apache::londefdef::table[-2]{'width'};
2021: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
2022: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
2023: }
2024: }
2025: }
2026:
2027: # width either comes forced from the TeXwidth or the width parameters.
2028: # in either case it can be a percentage or absolute width.
2029: # in the width case we ignore absolute width
2030: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2031: if (!defined($TeXwidth)) {
2032: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
2033: $safeeval,undef,1);
2034: if ($htmlwidth =~ /%/) {
2035: $TeXwidth = $htmlwidth;
2036: } else {
2037: $TeXwidth = $textwidth;
2038: }
2039: }
2040: # if the width is specified as a % it is converted to an absolute width.
2041: # otherwise.. just plugged right in the hash
2042:
2043: if ($TeXwidth=~/%/) {
2044: $TeXwidth=~/(\d+)/;
2045: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
2046: } else {
2047: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
2048: }
2049: # In the end, however the table width cannot be wider than $textwidth...
2050:
2051: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
2052: $Apache::londefdef::table[-1]{'width'} = $textwidth;
2053: }
2054: #table's border
2055: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2056: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2057: unless (defined $border) { $border = 0; }
2058: if ($border) {
2059: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
2060: $Apache::londefdef::table[-1]{'vinc'} = '&';
2061: $Apache::londefdef::table[-1]{'vvinc'} = '|';
2062: } else {
2063: $Apache::londefdef::table[-1]{'hinc'} = '';
2064: $Apache::londefdef::table[-1]{'vinc'} = '&';
2065: $Apache::londefdef::table[-1]{'vvinc'} = '';
2066: }
2067: if ($#Apache::londefdef::table==0) {
2068: # Note that \newline seems to destroy the alignment envs.
2069: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2070: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2071: }
2072: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2073: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2074: $Apache::londefdef::table[-1]{'objectlen'}=[];
2075: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2076: $Apache::londefdef::table[-1]{'maxlen'}=[];
2077: $Apache::londefdef::table[-1]{'minlen'}=[];
2078: $Apache::londefdef::table[-1]{'content'}=[];
2079: $Apache::londefdef::table[-1]{'align'}=[];
2080: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2081:
2082:
2083: }
2084: return $currentstring;
2085: }
2086:
2087: sub end_table {
2088: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2089: my $currentstring = '';
2090: if ($target eq 'web' || $target eq 'webgrade') {
2091: $currentstring = $token->[2];
2092: } elsif ($target eq 'tex') {
2093: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2094: my $inmemory = '';
2095: my $output = '';
2096: my $WARNING='';
2097: #width of columns from TeXwidth attributes
2098:
2099: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2100: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2101: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2102: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2103: }
2104: }
2105: }
2106: #free space and number of empty columns
2107: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2108: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2109: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2110: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2111: $empty_columns++;
2112: } else {
2113: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2114: }
2115: }
2116:
2117: #boundaries for contents columns
2118: my @min_len=();#columns can not be narrower
2119: my @max_len=();#maximum length of column
2120: my $avg_max;
2121: my $avg_min;
2122: my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
2123: for (my $jn=0;$jn<=$counter_cols; $jn++) {
2124: my ($localmin,$localmax)=(0,0);
2125: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2126: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2127: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2128: }
2129: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2130: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2131: }
2132: }
2133: push @min_len, $localmin;
2134: push @max_len, $localmax;
2135: $avg_max = $localmax + $avg_max;
2136: $avg_min = $localmin + $avg_min;
2137: }
2138: # Does not really matter what the average max/min are if there are no cols.
2139: # and this prevents div 0 in that case.
2140:
2141: if ($counter_cols != 0) {
2142: $avg_max = $avg_max/$counter_cols;
2143: $avg_min = $avg_min/$counter_cols;
2144: }
2145:
2146:
2147: # I don't think the below is needed.. but just in case:
2148:
2149: if ($avg_min > $avg_max) {
2150: my $temp = $avg_min;
2151: $avg_min = $avg_max;
2152: $avg_max = $temp;
2153: }
2154:
2155:
2156: for (my $jn=0;$jn<=$counter_cols;$jn++) {
2157: my $localmin=0,;
2158: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2159: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2160: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2161: }
2162: }
2163: if ($max_len[$jn]<$localmin) {
2164: $max_len[$jn]=$localmin;
2165: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2166: }#object size is bigger
2167: if ($min_len[$jn]<$localmin) {
2168: $min_len[$jn]=$localmin;
2169: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2170: }#object size is bigger
2171: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2172: $min_len[$jn]=0;
2173: $max_len[$jn]=0;
2174: }
2175: # Spans seem to be really bothered by max/min = 0. So if we have one
2176: # make it an average joe max/min.
2177:
2178: if ($max_len[$jn] == 0) {
2179: $max_len[$jn] = $avg_max;
2180: }
2181: if ($min_len[$jn] == 0) {
2182: $min_len[$jn] = $avg_min;
2183: }
2184:
2185: }
2186: #final adjustment of column width
2187: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2188: my @adjust=();
2189: #step 1. adjustment by maximum value
2190: my $space_needed=0;
2191: for (my $jn=0;$jn<=$#max_len;$jn++) {
2192: $space_needed=$space_needed+$max_len[$jn];
2193: }
2194: if ($space_needed<=$available_space) {
2195:
2196: for (my $jn=0;$jn<=$#max_len;$jn++) {
2197: if ($fwidth[$jn]==0) {
2198: $fwidth[$jn]=$max_len[$jn];
2199: }
2200: }
2201: } else {
2202: #step 2. adjustment by minimum value (estimation)
2203: $space_needed=0;
2204: for (my $jn=0;$jn<=$#min_len;$jn++) {
2205: $space_needed+=$min_len[$jn];
2206: }
2207: if ($space_needed>$available_space) {
2208: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2209: for (my $jn=0;$jn<=$#max_len;$jn++) {
2210: if ($fwidth[$jn]==0) {
2211: $fwidth[$jn]=$min_len[$jn];
2212: }
2213: }
2214: #check if we have objects which can be scaled
2215: my $how_many_to_scale=0;
2216: my @to_scale=();
2217: for (my $jn=0;$jn<=$#max_len;$jn++) {
2218: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2219: $how_many_to_scale++;
2220: push @to_scale, $jn;
2221: }
2222: }
2223: if ($how_many_to_scale>0) {
2224: my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
2225: foreach my $jn (@to_scale) {
2226: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2227: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2228: if ($1 ne '') {
2229: my $current_length=&recalc($1);
2230: $current_length=~/(\d+\.?\d*)/;
2231: $current_length=$current_length-$space_to_adjust;
2232: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2233: }
2234: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2235: if ($1 ne '') {
2236: my $current_length=$1;
2237: $current_length=$current_length-$space_to_adjust;
2238: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2239: }
2240: }
2241: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2242: }
2243: }
2244: } else {
2245: #step 3. adjustment over minimal + corrections
2246: my $enlarge_coef=$available_space/$space_needed;
2247: my $acsessive=0;
2248: for (my $jn=0;$jn<=$#min_len;$jn++) {
2249: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2250: if ($adjust[$jn]>$max_len[$jn]) {
2251: $fwidth[$jn]=$max_len[$jn];
2252: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2253: $adjust[$jn]=0;
2254:
2255: }
2256: }
2257: if ($acsessive>0) {
2258: #we have an excess of space and can redistribute it
2259: my $notempty_columns=0;
2260: for (my $jn=0;$jn<=$#min_len;$jn++) {
2261: if ($adjust[$jn]!=0) {
2262: $notempty_columns++;
2263: }
2264: }
2265: my $per_column=$acsessive/$notempty_columns;
2266: for (my $jn=0;$jn<=$#min_len;$jn++) {
2267: if ($adjust[$jn]!=0) {
2268: $adjust[$jn]+=$per_column;
2269: $fwidth[$jn]=$adjust[$jn];
2270: }
2271: }
2272: } else {
2273: for (my $jn=0;$jn<=$#min_len;$jn++) {
2274: $fwidth[$jn]=$adjust[$jn];
2275: }
2276: }
2277: }
2278: }
2279: # use all available width or specified width as if not specified,
2280: # the specified width gets defaulted to the available width.
2281:
2282: my $current=0;
2283: for (my $i=0;$i<=$#fwidth;$i++) {
2284: $current+=$fwidth[$i];
2285: }
2286: if ($current == 0) {
2287: $current = $Apache::londefdef::table[-1]{'width'};
2288: }
2289: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2290: for (my $i=0;$i<=$#fwidth;$i++) {
2291: $fwidth[$i]*=$coef;
2292: }
2293: #removing of empty columns if allowed
2294: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2295: if ($permission eq 'yes') {
2296: my @cleaned_table=();
2297: my @cleaned_header=();
2298: my $colind=0;
2299: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2300: if ($fwidth[$jn]!=0) {
2301: #we need to copy column
2302: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2303: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2304: $cleaned_header[$colind]=$fwidth[$jn];
2305: }
2306: $colind++;
2307: }
2308: }
2309: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2310: @fwidth=@cleaned_header;
2311: }
2312:
2313:
2314: #construct header of the table
2315: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2316: for (my $in=0;$in<=$#fwidth;$in++) {
2317: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2318: }
2319: $header_of_table .= '}';
2320:
2321: #fill the table
2322: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2323: my $have_rowspan = 0;
2324: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2325:
2326: #-----------------------------------------------------------
2327: # I think this order of doing things will ensure that
2328: # single rowspan, columspan and combined row/colspans will
2329: # work correctly. LaTeX is delicate here.
2330: # RF.
2331:
2332: # Start a rowspan if necessary:
2333:
2334: my $primary_col_width = $fwidth[$jn]; # Width of primary column.
2335: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2336: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2337: #
2338: # Do the appropriate magic if this has a colspan
2339: #
2340:
2341: my $border_char = "";
2342: if ($border) {
2343: $border_char = "|";
2344: }
2345: my $spanwidth = 0;
2346: if ($colspan > 1) {
2347: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2348: $spanwidth += $fwidth[$spancol];
2349: }
2350: $output .= '\multicolumn{'.
2351: $colspan
2352: ."}";
2353: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2354: $output .= '{'.$border_char.'c'.$border_char.'}{';
2355: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2356: $output .= '{'.$border_char.'r'.$border_char.'}{';
2357: }
2358: else {
2359: $output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
2360: }
2361:
2362: } else {
2363: $spanwidth = $primary_col_width; # If no span width will be just colwidth
2364: }
2365:
2366: # Rowspan... if colspan is 1, and there's an alignment we'll need
2367: # to kick in a multicolumn in order to get the alignment spec.
2368: # this must precede the multirow or LaTex gets quite upset.
2369: # Naturally if colspan > 1 we've already done that above ^
2370: #
2371: my $multirow_aligned = 0;
2372: if ($rowspan > 1) {
2373: if ($colspan == 1) {
2374: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2375: $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
2376: $multirow_aligned = 1;
2377: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2378: $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
2379: $multirow_aligned = 1;
2380: }
2381: }
2382: $have_rowspan++;
2383: if ($multirow_aligned) {
2384: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2385: } else {
2386: $output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
2387: }
2388:
2389: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2390: s{^\s*\\par\s*}{};
2391: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2392: s{\s*\\vskip\s*0pt\s*$}{};
2393:
2394: #
2395: # If we did not throw in a multicolumn to align, then add
2396: # an extra {
2397: # so we close correctly without having to keep additional state
2398: # around
2399: #
2400: if (!$multirow_aligned) {
2401: $output .= '{';
2402: }
2403: }
2404: if (($rowspan eq '^') || ($rowspan eq '_')) {
2405: $have_rowspan++;
2406: }
2407: #--------------------------------------------------------------
2408:
2409:
2410: # For right and center alignment of single cells.
2411: # we are going to use a multicolumn with a span of 1 to specify alignment.
2412: #
2413: if ($colspan == 1 && $rowspan == 1) {
2414: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2415: $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
2416: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2417: $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
2418: }
2419: }
2420:
2421: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2422:
2423: if (($colspan == 1 && $rowspan == 1) &&
2424: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2425: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2426: $output .= '}';
2427: }
2428:
2429: # Close off any open multirow:
2430:
2431: if ($rowspan > 1) {
2432: $output .= '}}';
2433: }
2434: # Close off the colspan...
2435: #
2436: if ($colspan > 1) {
2437: $output .= '}';
2438: $jn += $colspan-1; # Adjust for number of rows really left.
2439: }
2440: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2441: }
2442: # If have_rowspan > 0, and borders are on, then
2443: # we need to do more than put an \hline at the bottom of row.
2444: # we need to do the appropriate \cline to ensure that
2445: # the spanned rows don't have \hlines through them.
2446:
2447: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2448: $output .= ' \\\\ ';
2449: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2450: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2451: if ($rowspan ne "^") {
2452: if (($rowspan <= 1) || ($rowspan eq '_')) {
2453: my $column = $jn+1;
2454: $output .= '\cline{'.$column.'-'.$column.'} ';
2455: }
2456: }
2457: }
2458:
2459: } else {
2460: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2461: }
2462: }
2463: # Note that \newline destroys alignment env's produced by e.g. <div>
2464: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2465: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2466: if ($#Apache::londefdef::table > 0) {
2467: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2468: # Figure out max/and min width by summing us and then
2469: # apply that to the current column of the table we nest in
2470: # if it's larger than the current width or the current width
2471: # is undefined.
2472: #
2473: my $min_nested_width = 0;
2474: my $max_nested_width = 0;
2475: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2476: $min_nested_width += $min_len[$col];
2477: $max_nested_width += $max_len[$col];
2478:
2479: }
2480: # Fudge in an extra 5 mm for borders etc:
2481:
2482: $min_nested_width += 5;
2483: $max_nested_width += 5;
2484:
2485: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2486: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2487: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2488: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2489: }
2490: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2491: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2492: }
2493:
2494: pop @Apache::londefdef::table;
2495: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2496: } else {
2497: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2498: pop @Apache::londefdef::table;
2499: undef @Apache::londefdef::table;
2500: }
2501: }
2502: return $currentstring;
2503: }
2504:
2505: #-- <tr> tag (end tag optional)
2506: sub start_tr {
2507: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2508: my $currentstring = '';
2509: if ($target eq 'web' || $target eq 'webgrade') {
2510: $currentstring = $token->[4];
2511: } elsif ($target eq 'tex') {
2512: $Apache::londefdef::table[-1]{'row_number'}++;
2513: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2514: if ($alignchar ne '') {
2515: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2516: } else {
2517: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2518: }
2519: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2520: #
2521: # Need to save the number of table columns to preserve the max # columns.
2522: #
2523: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2524: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2525: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2526: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2527: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2528: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2529: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2530: }
2531: return $currentstring;
2532: }
2533:
2534: sub end_tr {
2535: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2536: my $currentstring = &end_p(); # Close any pending <p> in the row.
2537: if ($target eq 'web' || $target eq 'webgrade') {
2538: $currentstring .= $token->[2];
2539: } elsif ($target eq 'tex') {
2540: if ($Apache::londefdef::TD_redirection) {
2541: &end_td_tex($parstack,$parser,$safeeval);
2542: }
2543: # Counter columns must be the maximum number of columns seen
2544: # in the table so far so:
2545: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2546: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2547: }
2548:
2549:
2550:
2551: }
2552: return $currentstring;
2553: }
2554:
2555: #-- <td> tag (end tag optional)
2556: sub start_td {
2557: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2558: my $currentstring = '';
2559: if ($target eq 'web' || $target eq 'webgrade') {
2560: $currentstring = $token->[4];
2561: } elsif ($target eq 'tex') {
2562: $Apache::londefdef::TD_redirection = 1;
2563: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2564: }
2565: return $currentstring;
2566: }
2567:
2568: sub tag_check {
2569: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2570: my @ar=@$parstack;
2571: for (my $i=$#ar-1;$i>=0;$i--) {
2572: if (lc($$tagstack[$i]) eq $good_tag) {
2573: &start_td_tex($parstack,$parser,$safeeval);
2574: last;
2575: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2576: splice @ar, $i+1;
2577: &end_td_tex(\@ar,$parser,$safeeval);
2578: &start_td_tex($parstack,$parser,$safeeval);
2579: last;
2580: }
2581: }
2582: return '';
2583: }
2584:
2585: sub start_td_tex {
2586: my ($parstack,$parser,$safeeval) = @_;
2587: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2588: if ($alignchar eq '') {
2589: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2590: }
2591: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2592: $Apache::londefdef::table[-1]{'counter_columns'}++;
2593: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2594: if (defined $TeXwidth) {
2595: my $current_length=&recalc($TeXwidth);
2596: $current_length=~/(\d+\.?\d*)/;
2597: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2598: }
2599: &Apache::lonxml::startredirection();
2600: return '';
2601: }
2602:
2603: sub end_td_tex {
2604: my ($parstack,$parser,$safeeval) = @_;
2605: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2606: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2607: my $data = &Apache::lonxml::endredirection();
2608:
2609: # The rowspan array of the table indicates which cells are part of a span.
2610: # n indicates the start of a span set of n rows.
2611: # ^ indicates a cell that continues a span set.
2612: # _ indicates the cell is at the bottom of a span set.
2613: # If this and subsequent cells are part of a rowspan, we must
2614: # push along the row until we find one that is not.
2615:
2616: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2617: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2618: # Part of a span.
2619: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2620: $current_column++;
2621: }
2622: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2623:
2624:
2625: # Get the column and row spans.
2626: # Colspan can be done via \multicolumn if I can figure out the data structs.
2627:
2628: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2629: if (!$colspan) {
2630: $colspan = 1;
2631: }
2632:
2633: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2634: if (!$rowspan) {
2635: $rowspan = 1;
2636: }
2637:
2638:
2639:
2640: for (my $c = 0; $c < $colspan; $c++) {
2641: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2642: for (my $i = 1; $i < $rowspan; $i++) {
2643: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2644: if ($i == ($rowspan-1)) {
2645: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2646: }
2647: }
2648: }
2649:
2650: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2651: if (defined $TeXwidth) {
2652: for (my $c = 0; $c < $colspan; $c++) {
2653: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2654: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2655: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2656: }
2657: } else {
2658: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2659: my $garbage_data=$data;
2660: my $fwidth=0;
2661: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2662: my $current_length=&recalc($1);
2663: $current_length=~/(\d+\.?\d*)/;
2664: if ($fwidth<$1) {$fwidth=$1;}
2665: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2666: }
2667: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2668: my $current_length=$1;
2669: if ($fwidth<$current_length) {$fwidth=$current_length;}
2670: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2671: }
2672: for (my $c = 0; $c < $colspan; $c++) {
2673: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2674: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2675: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2676: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2677: }
2678: } 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)*/) {
2679: my $garbage_data=$data;
2680: my $fwidth=0;
2681: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2682: my $current_length=&recalc($1);
2683: $current_length=~/(\d+\.?\d*)/;
2684: if ($fwidth<$1) {$fwidth=$1;}
2685: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2686: }
2687: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2688: my $current_length=&recalc($1);
2689: $current_length=~/(\d+\.?\d*)/;
2690: if ($fwidth<$1) {$fwidth=$1;}
2691: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2692: }
2693: for (my $c = 0; $c < $colspan; $c++) {
2694: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2695: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
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: $data=~s/\\\\\s*$//;
2700: } else {
2701: $data=~s/^\s+(\S.*)/$1/;
2702: $data=~s/(.*\S)\s+$/$1/;
2703: $data=~s/(\s)+/$1/;
2704: my ($current_length,$min_length)=(0,0);
2705: if ($data=~/\\vskip/) {
2706: my $newdata=$data;
2707: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2708: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2709: foreach my $elementdata (@newdata) {
2710: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2711: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2712: my @words=split(/ /,$elementdata);
2713: foreach my $word (@words) {
2714: my $lengthword=2.5*&LATEX_length($word);
2715: if ($min_length<$lengthword) {$min_length=$lengthword;}
2716: }
2717: }
2718: } else {
2719: $current_length=2.5*&LATEX_length($data);
2720: my @words=split(/ /,$data);
2721: foreach my $word (@words) {
2722: my $lengthword=2*&LATEX_length($word);
2723: if ($min_length<$lengthword) {$min_length=$lengthword;}
2724: }
2725: }
2726: for (my $c = 0; $c < $colspan; $c++) {
2727: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2728: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2729: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2730: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2731: }
2732: }
2733: }
2734: # Substitute all of the tables nested in this cell in their appropriate places.
2735:
2736:
2737: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2738: for (my $in=0; $in<=$nested_count; $in++) {
2739: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2740: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2741: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2742: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2743:
2744: }
2745: # Should be be killing off the 'include' elements as they're used up?
2746:
2747: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2748:
2749:
2750:
2751:
2752: # the colspan array will indicate how many columns will be spanned by this
2753: # cell..this requires that counter_columns also be adjusted accordingly
2754: # so that the next bunch of text goes in the right cell. Note that since
2755: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2756: #
2757:
2758: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2759: for (my $i = 0; $i < ($colspan -1); $i++) {
2760: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2761: }
2762: for (my $r = 0; $r < $rowspan; $r++) {
2763: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2764: # Put empty text in spanned cols.
2765:
2766: }
2767:
2768:
2769:
2770: return '';
2771: }
2772:
2773: sub end_td {
2774: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2775: my $currentstring = '';
2776: if ($target eq 'web' || $target eq 'webgrade') {
2777: $currentstring = $token->[2];
2778: } elsif ($target eq 'tex') {
2779: $Apache::londefdef::TD_redirection =0;
2780: &end_td_tex($parstack,$parser,$safeeval);
2781: }
2782: return $currentstring;
2783: }
2784:
2785: #-- <th> tag (end tag optional)
2786: sub start_th {
2787: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2788: my $currentstring = '';
2789: if ($target eq 'web' || $target eq 'webgrade') {
2790: $currentstring = $token->[4];
2791: } elsif ($target eq 'tex') {
2792: $Apache::londefdef::TD_redirection = 1;
2793: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2794: }
2795: return $currentstring;
2796: }
2797:
2798: sub tagg_check {
2799: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2800: my @ar=@$parstack;
2801: for (my $i=$#ar-1;$i>=0;$i--) {
2802: if (lc($$tagstack[$i]) eq $good_tag) {
2803: &start_th_tex($parstack,$parser,$safeeval);
2804: last;
2805: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2806: splice @ar, $i+1;
2807: &end_th_tex(\@ar,$parser,$safeeval);
2808: &start_th_tex($parstack,$parser,$safeeval);
2809: last;
2810: }
2811: }
2812: return '';
2813: }
2814:
2815: sub start_th_tex {
2816: my ($parstack,$parser,$safeeval) = @_;
2817: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2818: if ($alignchar eq '') {
2819: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2820: }
2821: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2822: $Apache::londefdef::table[-1]{'counter_columns'}++;
2823: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2824: if (defined $TeXwidth) {
2825: my $current_length=&recalc($TeXwidth);
2826: $current_length=~/(\d+\.?\d*)/;
2827: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2828: }
2829: &Apache::lonxml::startredirection();
2830: return '';
2831: }
2832:
2833: sub end_th_tex {
2834: my ($parstack,$parser,$safeeval) = @_;
2835: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2836: my $data=&Apache::lonxml::endredirection();
2837: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2838: if (defined $TeXwidth) {
2839: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2840: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2841: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2842: } else {
2843: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2844: my $garbage_data=$data;
2845: my $fwidth=0;
2846: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2847: my $current_length=&recalc($1);
2848: $current_length=~/(\d+\.?\d*)/;
2849: if ($fwidth<$1) {$fwidth=$1;}
2850: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2851: }
2852: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2853: my $current_length=$1;
2854: if ($fwidth<$current_length) {$fwidth=$current_length;}
2855: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2856: }
2857: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2858: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2859: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2860: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2861: } else {
2862: $data=~s/^\s+(\S.*)/$1/;
2863: $data=~s/(.*\S)\s+$/$1/;
2864: $data=~s/(\s)+/$1/;
2865: my ($current_length,$min_length)=(0,0);
2866: if ($data=~/\\vskip/) {
2867: my $newdata=$data;
2868: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2869: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2870: foreach my $elementdata (@newdata) {
2871: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2872: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2873: my @words=split(/ /,$elementdata);
2874: foreach my $word (@words) {
2875: my $lengthword=2.5*&LATEX_length($word);
2876: if ($min_length<$lengthword) {$min_length=$lengthword;}
2877: }
2878: }
2879: } else {
2880: $current_length=2.5*&LATEX_length($data);
2881: my @words=split(/ /,$data);
2882: foreach my $word (@words) {
2883: my $lengthword=2*&LATEX_length($word);
2884: if ($min_length<$lengthword) {$min_length=$lengthword;}
2885: }
2886: }
2887: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2888: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2889: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2890: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2891: }
2892: }
2893: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2894: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2895: }
2896: #make data bold
2897: $data='\textbf{'.$data.'}';
2898: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2899: return'';
2900: }
2901:
2902: sub end_th {
2903: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2904: my $currentstring = &end_p(); # Close any open <p> in the row.
2905: if ($target eq 'web' || $target eq 'webgrade') {
2906: $currentstring .= $token->[2];
2907: } elsif ($target eq 'tex') {
2908: $Apache::londefdef::TD_redirection =0;
2909: &end_th_tex($parstack,$parser,$safeeval);
2910: }
2911: return $currentstring;
2912: }
2913:
2914: #-- <img> tag (end tag forbidden)
2915: #
2916: # Render the <IMG> tag.
2917: # <IMG> has the following attributes (in addition to the
2918: # standard HTML ones:
2919: # TeXwrap - Governs how the tex target will try to wrap text around
2920: # horizontally aligned images.
2921: # TeXwidth - The width of the image when rendered for print (mm).
2922: # TeXheight - The height of the image when rendered for print (mm)
2923: # (Note there seems to also be support for this as a % of page size)
2924: #
2925: sub start_img {
2926: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2927: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2928: undef,1);
2929: if (! $src &&
2930: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2931: ) {
2932: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2933: return '';
2934: }
2935: &Apache::lonxml::extlink($src);
2936: my $currentstring = '';
2937: my $scaling = .3;
2938:
2939: # Render unto browsers that which are the browser's...
2940:
2941: if ($target eq 'web' || $target eq 'webgrade') {
2942: if ($env{'browser.imagesuppress'} ne 'on') {
2943: my $enc = ('yes' eq
2944: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2945: $safeeval)));
2946: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2947: $enc);
2948: } else {
2949: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2950: undef,1);
2951: if (!$alttag) {
2952: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2953: $src);
2954: }
2955: $currentstring.='[IMAGE: '.$alttag.']';
2956: }
2957:
2958: # and render unto TeX that which is LaTeX
2959:
2960: } elsif ($target eq 'tex') {
2961: #
2962: # The alignment will require some superstructure to be put around
2963: # the \includegraphics stuff. At present we can only partially
2964: # simulate the alignments offered by html.
2965: #
2966: #
2967: my $align = lc(&Apache::lonxml::get_param('align',
2968: $parstack,
2969: $safeeval,
2970: undef,1));
2971: if(!$align) {
2972: $align = "bottom"; # This is html's default so it's ours too.
2973: }
2974: #
2975: &Apache::lonxml::debug("Alignemnt = $align");
2976: # LaTeX's image/text wrapping is really bad since it wants to
2977: # make figures float.
2978: # The user has the optional parameter (applicable only to l/r
2979: # alignment to use the picins/parpic directive to get wrapped text
2980: # this is also imperfect.. that's why we give them a choice...
2981: # so they can't yell at us for our choice.
2982: #
2983: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2984: $parstack,
2985: $safeeval,
2986: undef,0);
2987: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2988: if(!$latex_rendering) {
2989: $latex_rendering = "texwrap";
2990: }
2991: # using texwrap inside a table does not work. So, if after all of this,
2992: # texwrap is on, we turn it off if we detect we're in a table:
2993: #
2994: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2995: $latex_rendering = 'parpic';
2996: }
2997:
2998: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2999:
3000: #if original gif/jpg/png file exist do following:
3001: my $origsrc=$src;
3002: my ($path,$file) = &get_eps_image($src);
3003: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
3004: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
3005: &Apache::lonxml::debug("path = $path file = $file src = $src");
3006: if (-e $src) {
3007: &Apache::lonxml::debug("$src exists");
3008: my ($height_param,$width_param)=
3009: &image_size($origsrc,0.3,$parstack,$safeeval);
3010: my $size;
3011: if ($width_param) { $size.='width='.$width_param.' mm,'; }
3012: if ($height_param) { $size.='height='.$height_param.' mm]'; }
3013: # Default size if not able to extract that (e.g. eps image).
3014:
3015: # &Apache::lonnet::logthis("Size = $size");
3016:
3017: $size='['.$size;
3018: $size=~s/,$/]/;
3019: $currentstring .= '\graphicspath{{'.$path.'}}'
3020: .'\includegraphics'.$size.'{'.$file.'} ';
3021: my $closure;
3022: ($currentstring, $closure) = &align_latex_image($align,
3023: $latex_rendering,
3024: $currentstring,
3025: $width_param,
3026: $height_param);
3027: $currentstring .= $closure;
3028:
3029: } else {
3030: &Apache::lonxml::debug("$src does not exist");
3031: #original image file doesn't exist so check the alt attribute
3032: my $alt =
3033: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
3034: unless ($alt) {
3035: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3036: }
3037:
3038: if ($alt) { $currentstring .= ' '.$alt.' '; }
3039: }
3040:
3041: # And here's where the semi-quote breaks down: allow the user
3042: # to edit the beast as well by rendering the problem for edit:
3043: } elsif ($target eq 'edit') {
3044: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
3045: $currentstring .=&Apache::edit::tag_start($target,$token);
3046: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
3047: &Apache::edit::browse('src',undef,'alt',$only).' '.
3048: &Apache::edit::search('src',undef,'alt').'<br />';
3049: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
3050: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
3051: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
3052: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
3053: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
3054: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
3055: ['','bottom','middle','top','left','right'],$token,5);
3056: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
3057: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
3058: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
3059: ['no','yes'], $token, 2);
3060: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
3061: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
3062: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
3063: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
3064: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
3065:
3066: if ($token->[2]{'src'}=~/\$/) {
3067: $currentstring.='Variable image source';
3068: } else {
3069: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
3070: if ($width) { $currentstring.=' width="'.$width.'" '; }
3071: if ($height) { $currentstring.=' height="'.$height.'" '; }
3072: $currentstring .= ' />';
3073: }
3074: } elsif ($target eq 'modified') {
3075: my ($osrc,$owidth,$oheight)=
3076: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3077: my $ctag=&Apache::edit::get_new_args($token,$parstack,
3078: $safeeval,'src','alt','align',
3079: 'TeXwidth','TeXheight', 'TeXwrap',
3080: 'width','height','encrypturl');
3081: my ($nsrc,$nwidth,$nheight)=
3082: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3083: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
3084: &image_replication($loc);
3085: my ($iwidth,$iheight);
3086: if (-e $loc) {
3087: my $image = Image::Magick->new;
3088: $image->Read($loc);
3089: ($iwidth, $iheight) = ($image->Get('width'),
3090: $image->Get('height'));
3091: }
3092: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
3093: # changed image or no size specified,
3094: # if they didn't explicitly change the
3095: # width or height use the ones from the image
3096: if ($iwidth && $iheight) {
3097: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
3098: $token->[2]{'width'} = $iwidth;$ctag=1;
3099: }
3100: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
3101: $token->[2]{'height'}=$iheight;$ctag=1;
3102: }
3103: }
3104: }
3105: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
3106: # if we don't have a width or height
3107: if ($iwidth && $cwidth && !$cheight) {
3108: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
3109: }
3110: if ($iheight && $cheight && !$cwidth) {
3111: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
3112: }
3113: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3114: }
3115:
3116: return $currentstring;
3117: }
3118:
3119: sub end_img {
3120: my ($target,$token) = @_;
3121: my $currentstring = '';
3122: if ($target eq 'web' || $target eq 'webgrade') {
3123: $currentstring = $token->[2];
3124: } elsif ($target eq 'tex') {
3125: $currentstring = '';
3126: }
3127: return $currentstring;
3128: }
3129:
3130: #-- <applet> tag (end tag required)
3131: sub start_applet {
3132: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3133:
3134: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3135: &Apache::lonxml::extlink($code);
3136: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3137: undef,1);
3138: &Apache::lonxml::extlink($archive);
3139: my $currentstring = '';
3140: if ($target eq 'web' || $target eq 'webgrade') {
3141: if ($env{'browser.appletsuppress'} ne 'on') {
3142: $currentstring = &Apache::lonenc::encrypt_ref($token,
3143: {'code'=>$code,
3144: 'archive'=>$archive}
3145: );
3146: } else {
3147: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3148: $safeeval,undef,1);
3149: unless ($alttag) {
3150: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3151: $code);
3152: }
3153: $currentstring='[APPLET: '.$alttag.']';
3154: }
3155: } elsif ($target eq 'tex') {
3156: # Turn off some stuff we can't be inside thank you LaTeX
3157:
3158:
3159: my $restart_sub = 0;
3160: my $restart_sup = 0;
3161:
3162: # Since <sub> and <sup> are simple tags it's ok to turn off/on
3163: # using the start_ stop_ functions.. those tags only care about
3164: # $target.
3165:
3166: if (&is_inside_of($tagstack, "sub")) {
3167: $restart_sub = 1;
3168: $currentstring .= &end_sub($target, $token, $tagstack,
3169: $parstack, $parser, $safeeval);
3170: }
3171: if (&is_inside_of($tagstack, "sup")) {
3172: $restart_sup = 1;
3173: $currentstring .= &end_sup($target, $token, $tagstack,
3174: $parstack, $parser, $safeeval);
3175: }
3176:
3177: # Now process the applet; just replace it with its alt attribute.
3178:
3179: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3180: $safeeval,undef,1);
3181: unless ($alttag) {
3182: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3183: undef,1);
3184: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3185: $code);
3186: }
3187: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3188: '.}\end{center}';
3189:
3190: # Turn stuff back on that we can't be inside of.
3191:
3192: if ($restart_sub) {
3193: $currentstring .= &start_sub($target, $token, $tagstack,
3194: $parstack, $parser, $safeeval);
3195: }
3196: if ($restart_sup) {
3197: $currentstring .= &start_sup($target, $token, $tagstack,
3198: $parstack, $parser, $safeeval);
3199: }
3200: }
3201: return $currentstring;
3202: }
3203:
3204: sub end_applet {
3205: my ($target,$token) = @_;
3206: my $currentstring = '';
3207: if ($target eq 'web' || $target eq 'webgrade') {
3208: $currentstring = $token->[2];
3209: } elsif ($target eq 'tex') {
3210: }
3211: return $currentstring;
3212: }
3213:
3214: #-- <embed> tag (end tag optional/required)
3215: sub start_embed {
3216: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3217: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3218: &Apache::lonxml::extlink($src);
3219: my $currentstring = '';
3220: if ($target eq 'web' || $target eq 'webgrade') {
3221: if ($env{'browser.embedsuppress'} ne 'on') {
3222: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3223: } else {
3224: my $alttag=&Apache::lonxml::get_param
3225: ('alt',$parstack,$safeeval,undef,1);
3226: unless ($alttag) {
3227: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3228: }
3229: $currentstring='[EMBED: '.$alttag.']';
3230: }
3231: } elsif ($target eq 'tex') {
3232: }
3233: return $currentstring;
3234: }
3235:
3236: sub end_embed {
3237: my ($target,$token) = @_;
3238: my $currentstring = '';
3239: if ($target eq 'web' || $target eq 'webgrade') {
3240: $currentstring = $token->[2];
3241: } elsif ($target eq 'tex') {
3242: }
3243: return $currentstring;
3244: }
3245:
3246: #-- <param> tag (end tag forbidden)
3247: sub start_param {
3248: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3249: if (&Apache::lonxml::get_param('name',$parstack,
3250: $safeeval,undef,1)=~/^cabbase$/i) {
3251: my $value=&Apache::lonxml::get_param('value',$parstack,
3252: $safeeval,undef,1);
3253: &Apache::lonxml::extlink($value);
3254: }
3255:
3256: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3257: &Apache::lonxml::extlink($src);
3258: my $currentstring = '';
3259: if ($target eq 'web' || $target eq 'webgrade') {
3260: my %toconvert;
3261: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3262: if ($src) { $toconvert{'src'}= $src; }
3263: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3264: undef,1);
3265: if ($name=~/^cabbase$/i) {
3266: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3267: $safeeval,undef,1);
3268: }
3269: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3270: } elsif ($target eq 'tex') {
3271: }
3272: return $currentstring;
3273: }
3274:
3275: sub end_param {
3276: my ($target,$token) = @_;
3277: my $currentstring = '';
3278: if ($target eq 'web' || $target eq 'webgrade') {
3279: $currentstring = $token->[2];
3280: } elsif ($target eq 'tex') {
3281: }
3282: return $currentstring;
3283: }
3284:
3285: #-- <allow> tag
3286: sub start_allow {
3287: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3288: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3289: &Apache::lonxml::extlink($src);
3290:
3291: if ($target eq 'tex') { &image_replication($src); }
3292: my $result;
3293: if ($target eq 'edit') {
3294: $result .=&Apache::edit::tag_start($target,$token);
3295: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3296: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3297: } elsif ($target eq 'modified') {
3298: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3299: $safeeval,'src');
3300: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3301: }
3302: return $result;
3303: }
3304:
3305: sub end_allow {
3306: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3307: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3308: return '';
3309: }
3310:
3311: #-- Frames (end tag required)
3312: #-- <frameset>
3313: sub start_frameset {
3314: my ($target,$token) = @_;
3315: my $currentstring = ''; # Close any pending para.
3316: if ($target eq 'web' || $target eq 'webgrade') {
3317: $currentstring =
3318: &Apache::loncommon::start_page($Apache::londefdef::title,
3319: $Apache::londefdef::head,
3320: {'add_entries' => $token->[2],
3321: 'no_title' => 1,
3322: 'force_register' => 1,
3323: 'frameset' => 1,});
3324:
3325: }
3326: return $currentstring;
3327: }
3328:
3329: sub end_frameset {
3330: my ($target,$token) = @_;
3331: my $currentstring = '';
3332: if ($target eq 'web' || $target eq 'webgrade') {
3333: $currentstring = $token->[2];
3334: }
3335: return $currentstring;
3336: }
3337:
3338: #-- <xmp> (end tag required)
3339: sub start_xmp {
3340: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3341: my $currentstring = '';
3342: if ($target eq 'web' || $target eq 'webgrade') {
3343: $currentstring .= $token->[4];
3344: } elsif ($target eq 'tex') {
3345: $currentstring .= '\begin{verbatim}';
3346: }
3347: return $currentstring;
3348: }
3349:
3350: sub end_xmp {
3351: my ($target,$token) = @_;
3352: my $currentstring = '';
3353: if ($target eq 'web' || $target eq 'webgrade') {
3354: $currentstring .= $token->[2];
3355: } elsif ($target eq 'tex') {
3356: $currentstring .= '\end{verbatim}';
3357: }
3358: return $currentstring;
3359: }
3360:
3361: #-- <pre> (end tag required)
3362: sub start_pre {
3363: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3364: my $currentstring = &end_p(); # close off pending <p>
3365: if ($target eq 'web' || $target eq 'webgrade') {
3366: $currentstring .= $token->[4];
3367: } elsif ($target eq 'tex') {
3368: $currentstring .= '\begin{verbatim}';
3369: &Apache::lonxml::disable_LaTeX_substitutions();
3370: }
3371: return $currentstring;
3372: }
3373:
3374: sub end_pre {
3375: my ($target,$token) = @_;
3376: my $currentstring = '';
3377: if ($target eq 'web' || $target eq 'webgrade') {
3378: $currentstring .= $token->[2];
3379: } elsif ($target eq 'tex') {
3380: $currentstring .= '\end{verbatim}';
3381: &Apache::lonxml::enable_LaTeX_substitutions();
3382: }
3383: return $currentstring;
3384: }
3385:
3386: #-- <insert>
3387: sub start_insert {
3388: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3389: my $currentstring = '';
3390: if ($target eq 'web' || $target eq 'webgrade') {
3391: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3392: $currentstring .= '<b>'.$display.'</b>';;
3393: }
3394: return $currentstring;
3395: }
3396:
3397: sub end_insert {
3398: my ($target,$token) = @_;
3399: my $currentstring = '';
3400: if ($target eq 'web' || $target eq 'webgrade') {
3401: $currentstring .= '';
3402: }
3403: return $currentstring;
3404: }
3405:
3406: #-- <externallink>
3407: sub start_externallink {
3408: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3409: my $currentstring = '';
3410: if ($target eq 'web' || $target eq 'webgrade') {
3411: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3412: $currentstring .= '<b>'.$display.'</b>';;
3413: }
3414: return $currentstring;
3415: }
3416:
3417: sub end_externallink {
3418: my ($target,$token) = @_;
3419: my $currentstring = '';
3420: if ($target eq 'web' || $target eq 'webgrade') {
3421: $currentstring .= '';
3422: }
3423: return $currentstring;
3424: }
3425:
3426: #-- <blankspace heigth="">
3427: sub start_blankspace {
3428: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3429: my $currentstring = &end_p(); # closes off any unclosed <p>
3430: if ($target eq 'tex') {
3431: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3432: $currentstring .= '\vskip '.$howmuch.' ';
3433: }
3434: return $currentstring;
3435: }
3436:
3437: sub end_blankspace {
3438: my ($target,$token) = @_;
3439: my $currentstring = '';
3440: if ($target eq 'tex') {
3441: $currentstring .= '';
3442: }
3443: return $currentstring;
3444: }
3445:
3446: #-- <abbr> tag (end tag required)
3447: sub start_abbr {
3448: my ($target,$token) = @_;
3449: my $currentstring = '';
3450: if ($target eq 'web' || $target eq 'webgrade') {
3451: $currentstring = $token->[4];
3452: }
3453: return $currentstring;
3454: }
3455:
3456: sub end_abbr {
3457: my ($target,$token) = @_;
3458: my $currentstring = '';
3459: if ($target eq 'web' || $target eq 'webgrade') {
3460: $currentstring = $token->[2];
3461: }
3462: return $currentstring;
3463: }
3464:
3465: #-- <acronym> tag (end tag required)
3466: sub start_acronym {
3467: my ($target,$token) = @_;
3468: my $currentstring = '';
3469: if ($target eq 'web' || $target eq 'webgrade') {
3470: $currentstring = $token->[4];
3471: }
3472: return $currentstring;
3473: }
3474:
3475: sub end_acronym {
3476: my ($target,$token) = @_;
3477: my $currentstring = '';
3478: if ($target eq 'web' || $target eq 'webgrade') {
3479: $currentstring = $token->[2];
3480: }
3481: return $currentstring;
3482: }
3483:
3484: #-- <area> tag (end tag forbidden)
3485: sub start_area {
3486: my ($target,$token) = @_;
3487: my $currentstring = '';
3488: if ($target eq 'web' || $target eq 'webgrade') {
3489: $currentstring = $token->[4];
3490: }
3491: return $currentstring;
3492: }
3493:
3494: sub end_area {
3495: my ($target,$token) = @_;
3496: my $currentstring = '';
3497: if ($target eq 'web' || $target eq 'webgrade') {
3498: $currentstring = $token->[2];
3499: }
3500: return $currentstring;
3501: }
3502:
3503: #-- <base> tag (end tag forbidden)
3504: sub start_base {
3505: my ($target,$token) = @_;
3506: my $currentstring = '';
3507: if ($target eq 'web' || $target eq 'webgrade') {
3508: $currentstring = $token->[4];
3509: }
3510: return $currentstring;
3511: }
3512:
3513: sub end_base {
3514: my ($target,$token) = @_;
3515: my $currentstring = '';
3516: if ($target eq 'web' || $target eq 'webgrade') {
3517: $currentstring = $token->[2];
3518: }
3519: return $currentstring;
3520: }
3521:
3522: #-- <bdo> tag (end tag required)
3523: sub start_bdo {
3524: my ($target,$token) = @_;
3525: my $currentstring = '';
3526: if ($target eq 'web' || $target eq 'webgrade') {
3527: $currentstring = $token->[4];
3528: }
3529: return $currentstring;
3530: }
3531:
3532: sub end_bdo {
3533: my ($target,$token) = @_;
3534: my $currentstring = '';
3535: if ($target eq 'web' || $target eq 'webgrade') {
3536: $currentstring = $token->[2];
3537: }
3538: return $currentstring;
3539: }
3540:
3541: #-- <bgsound> tag (end tag optional)
3542: sub start_bgsound {
3543: my ($target,$token) = @_;
3544: my $currentstring = '';
3545: if ($target eq 'web' || $target eq 'webgrade') {
3546: $currentstring = $token->[4];
3547: }
3548: return $currentstring;
3549: }
3550:
3551: sub end_bgsound {
3552: my ($target,$token) = @_;
3553: my $currentstring = '';
3554: if ($target eq 'web' || $target eq 'webgrade') {
3555: $currentstring = $token->[2];
3556: }
3557: return $currentstring;
3558: }
3559:
3560: #-- <blink> tag (end tag required)
3561: sub start_blink {
3562: my ($target,$token) = @_;
3563: my $currentstring = '';
3564: if ($target eq 'web' || $target eq 'webgrade') {
3565: $currentstring = $token->[4];
3566: }
3567: return $currentstring;
3568: }
3569:
3570: sub end_blink {
3571: my ($target,$token) = @_;
3572: my $currentstring = '';
3573: if ($target eq 'web' || $target eq 'webgrade') {
3574: $currentstring = $token->[2];
3575: }
3576: return $currentstring;
3577: }
3578:
3579: #-- <blockquote> tag (end tag required)
3580: sub start_blockquote {
3581: my ($target,$token) = @_;
3582: my $currentstring = &end_p(); # Close any unclosed <p>
3583: if ($target eq 'web' || $target eq 'webgrade') {
3584: $currentstring .= $token->[4];
3585: }
3586: if ($target eq 'tex') {
3587: $currentstring .= '\begin{quote}';
3588: }
3589: return $currentstring;
3590: }
3591:
3592: sub end_blockquote {
3593: my ($target,$token) = @_;
3594: my $currentstring = '';
3595: if ($target eq 'web' || $target eq 'webgrade') {
3596: $currentstring = $token->[2];
3597: }
3598: if ($target eq 'tex') {
3599: $currentstring = '\end{quote}';
3600: }
3601: return $currentstring;
3602: }
3603:
3604: #-- <button> tag (end tag required)
3605: sub start_button {
3606: my ($target,$token) = @_;
3607: my $currentstring = '';
3608: if ($target eq 'web' || $target eq 'webgrade') {
3609: $currentstring = $token->[4];
3610: }
3611: return $currentstring;
3612: }
3613:
3614: sub end_button {
3615: my ($target,$token) = @_;
3616: my $currentstring = '';
3617: if ($target eq 'web' || $target eq 'webgrade') {
3618: $currentstring = $token->[2];
3619: }
3620: return $currentstring;
3621: }
3622:
3623: #-- <caption> tag (end tag required)
3624: sub start_caption {
3625: my ($target,$token) = @_;
3626: my $currentstring = '';
3627: if ($target eq 'web' || $target eq 'webgrade') {
3628: $currentstring = $token->[4];
3629: }
3630: return $currentstring;
3631: }
3632:
3633: sub end_caption {
3634: my ($target,$token) = @_;
3635: my $currentstring = '';
3636: if ($target eq 'web' || $target eq 'webgrade') {
3637: $currentstring = $token->[2];
3638: }
3639: return $currentstring;
3640: }
3641:
3642: #-- <col> tag (end tag forbdden)
3643: sub start_col {
3644: my ($target,$token) = @_;
3645: my $currentstring = '';
3646: if ($target eq 'web' || $target eq 'webgrade') {
3647: $currentstring = $token->[4];
3648: }
3649: return $currentstring;
3650: }
3651:
3652: sub end_col {
3653: my ($target,$token) = @_;
3654: my $currentstring = '';
3655: if ($target eq 'web' || $target eq 'webgrade') {
3656: $currentstring = $token->[2];
3657: }
3658: return $currentstring;
3659: }
3660:
3661: #-- <colgroup> tag (end tag optional)
3662: sub start_colgroup {
3663: my ($target,$token) = @_;
3664: my $currentstring = '';
3665: if ($target eq 'web' || $target eq 'webgrade') {
3666: $currentstring = $token->[4];
3667: }
3668: return $currentstring;
3669: }
3670:
3671: sub end_colgroup {
3672: my ($target,$token) = @_;
3673: my $currentstring = '';
3674: if ($target eq 'web' || $target eq 'webgrade') {
3675: $currentstring = $token->[2];
3676: }
3677: return $currentstring;
3678: }
3679:
3680: #-- <del> tag (end tag required)
3681: sub start_del {
3682: my ($target,$token) = @_;
3683: my $currentstring = '';
3684: if ($target eq 'web' || $target eq 'webgrade') {
3685: $currentstring = $token->[4];
3686: }
3687: return $currentstring;
3688: }
3689:
3690: sub end_del {
3691: my ($target,$token) = @_;
3692: my $currentstring = '';
3693: if ($target eq 'web' || $target eq 'webgrade') {
3694: $currentstring = $token->[2];
3695: }
3696: return $currentstring;
3697: }
3698:
3699: #-- <fieldset> tag (end tag required)
3700: sub start_fieldset {
3701: my ($target,$token) = @_;
3702: my $currentstring = '';
3703: if ($target eq 'web' || $target eq 'webgrade') {
3704: $currentstring = $token->[4];
3705: }
3706: return $currentstring;
3707: }
3708:
3709: sub end_fieldset {
3710: my ($target,$token) = @_;
3711: my $currentstring = '';
3712: if ($target eq 'web' || $target eq 'webgrade') {
3713: $currentstring = $token->[2];
3714: }
3715: return $currentstring;
3716: }
3717:
3718: #-- <frame> tag (end tag forbidden)
3719: sub start_frame {
3720: my ($target,$token) = @_;
3721: my $currentstring = '';
3722: if ($target eq 'web' || $target eq 'webgrade') {
3723: $currentstring = $token->[4];
3724: }
3725: return $currentstring;
3726: }
3727:
3728: sub end_frame {
3729: my ($target,$token) = @_;
3730: my $currentstring = '';
3731: if ($target eq 'web' || $target eq 'webgrade') {
3732: $currentstring = $token->[2];
3733: }
3734: return $currentstring;
3735: }
3736:
3737: #-- <iframe> tag (end tag required)
3738: sub start_iframe {
3739: my ($target,$token) = @_;
3740: my $currentstring = '';
3741: if ($target eq 'web' || $target eq 'webgrade') {
3742: $currentstring = $token->[4];
3743: }
3744: return $currentstring;
3745: }
3746:
3747: sub end_iframe {
3748: my ($target,$token) = @_;
3749: my $currentstring = '';
3750: if ($target eq 'web' || $target eq 'webgrade') {
3751: $currentstring = $token->[2];
3752: }
3753: return $currentstring;
3754: }
3755:
3756: #-- <ins> tag (end tag required)
3757: sub start_ins {
3758: my ($target,$token) = @_;
3759: my $currentstring = '';
3760: if ($target eq 'web' || $target eq 'webgrade') {
3761: $currentstring = $token->[4];
3762: }
3763: return $currentstring;
3764: }
3765:
3766: sub end_ins {
3767: my ($target,$token) = @_;
3768: my $currentstring = '';
3769: if ($target eq 'web' || $target eq 'webgrade') {
3770: $currentstring = $token->[2];
3771: }
3772: return $currentstring;
3773: }
3774:
3775: #-- <isindex> tag (end tag forbidden)
3776: sub start_isindex {
3777: my ($target,$token) = @_;
3778: my $currentstring = '';
3779: if ($target eq 'web' || $target eq 'webgrade') {
3780: $currentstring = $token->[4];
3781: }
3782: return $currentstring;
3783: }
3784:
3785: sub end_isindex {
3786: my ($target,$token) = @_;
3787: my $currentstring = '';
3788: if ($target eq 'web' || $target eq 'webgrade') {
3789: $currentstring = $token->[2];
3790: }
3791: return $currentstring;
3792: }
3793:
3794: #-- <keygen> tag (end tag forbidden)
3795: sub start_keygen {
3796: my ($target,$token) = @_;
3797: my $currentstring = '';
3798: if ($target eq 'web' || $target eq 'webgrade') {
3799: $currentstring = $token->[4];
3800: }
3801: return $currentstring;
3802: }
3803:
3804: sub end_keygen {
3805: my ($target,$token) = @_;
3806: my $currentstring = '';
3807: if ($target eq 'web' || $target eq 'webgrade') {
3808: $currentstring = $token->[2];
3809: }
3810: return $currentstring;
3811: }
3812:
3813: #-- <label> tag
3814: sub start_label {
3815: my ($target,$token) = @_;
3816: my $currentstring = '';
3817: if ($target eq 'web' || $target eq 'webgrade') {
3818: $currentstring = $token->[4];
3819: }
3820: return $currentstring;
3821: }
3822:
3823: sub end_label {
3824: my ($target,$token) = @_;
3825: my $currentstring = '';
3826: if ($target eq 'web' || $target eq 'webgrade') {
3827: $currentstring = $token->[2];
3828: }
3829: return $currentstring;
3830: }
3831:
3832: #-- <layer> tag (end tag required)
3833: sub start_layer {
3834: my ($target,$token) = @_;
3835: my $currentstring = '';
3836: if ($target eq 'web' || $target eq 'webgrade') {
3837: $currentstring = $token->[4];
3838: }
3839: return $currentstring;
3840: }
3841:
3842: sub end_layer {
3843: my ($target,$token) = @_;
3844: my $currentstring = '';
3845: if ($target eq 'web' || $target eq 'webgrade') {
3846: $currentstring = $token->[2];
3847: }
3848: return $currentstring;
3849: }
3850:
3851: #-- <legend> tag (end tag required)
3852: sub start_legend {
3853: my ($target,$token) = @_;
3854: my $currentstring = '';
3855: if ($target eq 'web' || $target eq 'webgrade') {
3856: $currentstring = $token->[4];
3857: }
3858: return $currentstring;
3859: }
3860:
3861: sub end_legend {
3862: my ($target,$token) = @_;
3863: my $currentstring = '';
3864: if ($target eq 'web' || $target eq 'webgrade') {
3865: $currentstring = $token->[2];
3866: }
3867: return $currentstring;
3868: }
3869:
3870: #-- <link> tag (end tag forbidden)
3871: sub start_link {
3872: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3873: my $currentstring = '';
3874: if ($target eq 'web' || $target eq 'webgrade') {
3875: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3876: undef,1);
3877: &Apache::lonxml::extlink($href);
3878: $currentstring = $token->[4];
3879: }
3880: return $currentstring;
3881: }
3882:
3883: sub end_link {
3884: my ($target,$token) = @_;
3885: my $currentstring = '';
3886: if ($target eq 'web' || $target eq 'webgrade') {
3887: $currentstring = $token->[2];
3888: }
3889: return $currentstring;
3890: }
3891:
3892: #-- <marquee> tag (end tag optional)
3893: sub start_marquee {
3894: my ($target,$token) = @_;
3895: my $currentstring = '';
3896: if ($target eq 'web' || $target eq 'webgrade') {
3897: $currentstring = $token->[4];
3898: }
3899: return $currentstring;
3900: }
3901:
3902: sub end_marquee {
3903: my ($target,$token) = @_;
3904: my $currentstring = '';
3905: if ($target eq 'web' || $target eq 'webgrade') {
3906: $currentstring = $token->[2];
3907: }
3908: return $currentstring;
3909: }
3910:
3911: #-- <multicol> tag (end tag required)
3912: sub start_multicol {
3913: my ($target,$token) = @_;
3914: my $currentstring = &end_p(); # Close any pending <p>
3915: if ($target eq 'web' || $target eq 'webgrade') {
3916: $currentstring .= $token->[4];
3917: }
3918: return $currentstring;
3919: }
3920:
3921: sub end_multicol {
3922: my ($target,$token) = @_;
3923: my $currentstring = '';
3924: if ($target eq 'web' || $target eq 'webgrade') {
3925: $currentstring = $token->[2];
3926: }
3927: return $currentstring;
3928: }
3929:
3930: #-- <nobr> tag (end tag required)
3931: sub start_nobr {
3932: my ($target,$token) = @_;
3933: my $currentstring = '';
3934: if ($target eq 'web' || $target eq 'webgrade') {
3935: $currentstring = $token->[4];
3936: } elsif ($target eq 'tex') {
3937: $currentstring='\mbox{';
3938: }
3939: return $currentstring;
3940: }
3941:
3942: sub end_nobr {
3943: my ($target,$token) = @_;
3944: my $currentstring = '';
3945: if ($target eq 'web' || $target eq 'webgrade') {
3946: $currentstring = $token->[2];
3947: } elsif ($target eq 'tex') {
3948: $currentstring='}';
3949: }
3950: return $currentstring;
3951: }
3952:
3953: #-- <noembed> tag (end tag required)
3954: sub start_noembed {
3955: my ($target,$token) = @_;
3956: my $currentstring = '';
3957: if ($target eq 'web' || $target eq 'webgrade') {
3958: $currentstring = $token->[4];
3959: }
3960: return $currentstring;
3961: }
3962:
3963: sub end_noembed {
3964: my ($target,$token) = @_;
3965: my $currentstring = '';
3966: if ($target eq 'web' || $target eq 'webgrade') {
3967: $currentstring = $token->[2];
3968: }
3969: return $currentstring;
3970: }
3971:
3972: #-- <noframes> tag (end tag required)
3973: sub start_noframes {
3974: my ($target,$token) = @_;
3975: my $currentstring = '';
3976: if ($target eq 'web' || $target eq 'webgrade') {
3977: $currentstring = $token->[4];
3978: }
3979: return $currentstring;
3980: }
3981:
3982: sub end_noframes {
3983: my ($target,$token) = @_;
3984: my $currentstring = '';
3985: if ($target eq 'web' || $target eq 'webgrade') {
3986: $currentstring = $token->[2];
3987: }
3988: return $currentstring;
3989: }
3990:
3991: #-- <nolayer> tag (end tag required)
3992: sub start_nolayer {
3993: my ($target,$token) = @_;
3994: my $currentstring = '';
3995: if ($target eq 'web' || $target eq 'webgrade') {
3996: $currentstring = $token->[4];
3997: }
3998: return $currentstring;
3999: }
4000:
4001: sub end_nolayer {
4002: my ($target,$token) = @_;
4003: my $currentstring = '';
4004: if ($target eq 'web' || $target eq 'webgrade') {
4005: $currentstring = $token->[2];
4006: }
4007: return $currentstring;
4008: }
4009:
4010: #-- <noscript> tag (end tag required)
4011: sub start_noscript {
4012: my ($target,$token) = @_;
4013: my $currentstring = '';
4014: if ($target eq 'web' || $target eq 'webgrade') {
4015: $currentstring = $token->[4];
4016: }
4017: return $currentstring;
4018: }
4019:
4020: sub end_noscript {
4021: my ($target,$token) = @_;
4022: my $currentstring = '';
4023: if ($target eq 'web' || $target eq 'webgrade') {
4024: $currentstring = $token->[2];
4025: }
4026: return $currentstring;
4027: }
4028:
4029: #-- <object> tag (end tag required)
4030: sub start_object {
4031: my ($target,$token) = @_;
4032: my $currentstring = '';
4033: if ($target eq 'web' || $target eq 'webgrade') {
4034: $currentstring = $token->[4];
4035: }
4036: return $currentstring;
4037: }
4038:
4039: sub end_object {
4040: my ($target,$token) = @_;
4041: my $currentstring = '';
4042: if ($target eq 'web' || $target eq 'webgrade') {
4043: $currentstring = $token->[2];
4044: }
4045: return $currentstring;
4046: }
4047:
4048: #-- <optgroup> tag (end tag required)
4049: sub start_optgroup {
4050: my ($target,$token) = @_;
4051: my $currentstring = '';
4052: if ($target eq 'web' || $target eq 'webgrade') {
4053: $currentstring = $token->[4];
4054: }
4055: return $currentstring;
4056: }
4057:
4058: sub end_optgroup {
4059: my ($target,$token) = @_;
4060: my $currentstring = '';
4061: if ($target eq 'web' || $target eq 'webgrade') {
4062: $currentstring = $token->[2];
4063: }
4064: return $currentstring;
4065: }
4066:
4067: #-- <samp> tag (end tag required)
4068: sub start_samp {
4069: my ($target,$token) = @_;
4070: my $currentstring = '';
4071: if ($target eq 'web' || $target eq 'webgrade') {
4072: $currentstring = $token->[4];
4073: } elsif ($target eq 'tex') {
4074: $currentstring='\texttt{';
4075: }
4076: return $currentstring;
4077: }
4078:
4079: sub end_samp {
4080: my ($target,$token) = @_;
4081: my $currentstring = '';
4082: if ($target eq 'web' || $target eq 'webgrade') {
4083: $currentstring = $token->[2];
4084: } elsif ($target eq 'tex') {
4085: $currentstring='}';
4086: }
4087: return $currentstring;
4088: }
4089:
4090: #-- <server> tag
4091: sub start_server {
4092: my ($target,$token) = @_;
4093: my $currentstring = '';
4094: if ($target eq 'web' || $target eq 'webgrade') {
4095: $currentstring = $token->[4];
4096: }
4097: return $currentstring;
4098: }
4099:
4100: sub end_server {
4101: my ($target,$token) = @_;
4102: my $currentstring = '';
4103: if ($target eq 'web' || $target eq 'webgrade') {
4104: $currentstring = $token->[2];
4105: }
4106: return $currentstring;
4107: }
4108:
4109: #-- <spacer> tag (end tag forbidden)
4110: sub start_spacer {
4111: my ($target,$token) = @_;
4112: my $currentstring = &end_p(); # Close off any open <p> tag.
4113: if ($target eq 'web' || $target eq 'webgrade') {
4114: $currentstring .= $token->[4];
4115: }
4116: return $currentstring;
4117: }
4118:
4119: sub end_spacer {
4120: my ($target,$token) = @_;
4121: my $currentstring = '';
4122: if ($target eq 'web' || $target eq 'webgrade') {
4123: $currentstring = $token->[2];
4124: }
4125: return $currentstring;
4126: }
4127:
4128: #-- <span> tag (end tag required)
4129: sub start_span {
4130: my ($target,$token) = @_;
4131: my $currentstring = '';
4132: if ($target eq 'web' || $target eq 'webgrade') {
4133: $currentstring = $token->[4];
4134: }
4135: return $currentstring;
4136: }
4137:
4138: sub end_span {
4139: my ($target,$token) = @_;
4140: my $currentstring = '';
4141: if ($target eq 'web' || $target eq 'webgrade') {
4142: $currentstring = $token->[2];
4143: }
4144: return $currentstring;
4145: }
4146:
4147: #-- <tbody> tag (end tag optional)
4148: sub start_tbody {
4149: my ($target,$token) = @_;
4150: my $currentstring = '';
4151: if ($target eq 'web' || $target eq 'webgrade') {
4152: $currentstring = $token->[4];
4153: }
4154: return $currentstring;
4155: }
4156:
4157: sub end_tbody {
4158: my ($target,$token) = @_;
4159: my $currentstring = '';
4160: if ($target eq 'web' || $target eq 'webgrade') {
4161: $currentstring = $token->[2];
4162: }
4163: return $currentstring;
4164: }
4165:
4166: #-- <tfoot> tag (end tag optional)
4167: sub start_tfoot {
4168: my ($target,$token) = @_;
4169: my $currentstring = '';
4170: if ($target eq 'web' || $target eq 'webgrade') {
4171: $currentstring = $token->[4];
4172: }
4173: return $currentstring;
4174: }
4175:
4176: sub end_tfoot {
4177: my ($target,$token) = @_;
4178: my $currentstring = '';
4179: if ($target eq 'web' || $target eq 'webgrade') {
4180: $currentstring = $token->[2];
4181: }
4182: return $currentstring;
4183: }
4184:
4185: #-- <thead> tag (end tag optional)
4186: sub start_thead {
4187: my ($target,$token) = @_;
4188: my $currentstring = '';
4189: if ($target eq 'web' || $target eq 'webgrade') {
4190: $currentstring = $token->[4];
4191: }
4192: return $currentstring;
4193: }
4194:
4195: sub end_thead {
4196: my ($target,$token) = @_;
4197: my $currentstring = '';
4198: if ($target eq 'web' || $target eq 'webgrade') {
4199: $currentstring = $token->[2];
4200: }
4201: return $currentstring;
4202: }
4203:
4204: #-- <var> tag
4205: sub start_var {
4206: my ($target,$token) = @_;
4207: my $currentstring = '';
4208: if ($target eq 'web' || $target eq 'webgrade') {
4209: $currentstring = $token->[4];
4210: } elsif ($target eq 'tex') {
4211: $currentstring = '\textit{';
4212: }
4213: return $currentstring;
4214: }
4215:
4216: sub end_var {
4217: my ($target,$token) = @_;
4218: my $currentstring = '';
4219: if ($target eq 'web' || $target eq 'webgrade') {
4220: $currentstring = $token->[2];
4221: } elsif ($target eq 'tex') {
4222: $currentstring = '}';
4223: }
4224: return $currentstring;
4225: }
4226:
4227: #-- <wbr> tag (end tag forbidden)
4228: sub start_wbr {
4229: my ($target,$token) = @_;
4230: my $currentstring = '';
4231: if ($target eq 'web' || $target eq 'webgrade') {
4232: $currentstring = $token->[4];
4233: }
4234: return $currentstring;
4235: }
4236:
4237: sub end_wbr {
4238: my ($target,$token) = @_;
4239: my $currentstring = '';
4240: if ($target eq 'web' || $target eq 'webgrade') {
4241: $currentstring = $token->[2];
4242: }
4243: return $currentstring;
4244: }
4245:
4246: #-- <hideweboutput> tag
4247: sub start_hideweboutput {
4248: my ($target,$token) = @_;
4249: if ($target eq 'web' || $target eq 'webgrade') {
4250: &Apache::lonxml::startredirection();
4251: }
4252: return '';
4253: }
4254:
4255: sub end_hideweboutput {
4256: my ($target,$token) = @_;
4257: my $currentstring = '';
4258: if ($target eq 'web' || $target eq 'webgrade') {
4259: $currentstring = &Apache::lonxml::endredirection();
4260: }
4261: return '';
4262: }
4263:
4264:
4265: sub image_replication {
4266: my $src = shift;
4267: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4268: #replicates eps or ps
4269: my $epssrc = my $pssrc = $src;
4270: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4271: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4272: if (not -e $epssrc && not -e $pssrc) {
4273: my $result=&Apache::lonnet::repcopy($epssrc);
4274: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4275: }
4276: return '';
4277: }
4278: #
4279: # Get correct sizing parameter for an image given
4280: # it's initial ht. and wid. This allows sizing of
4281: # images that are generated on-the-fly (e.g. gnuplot)
4282: # as well as serving as a utility for image_size.
4283: #
4284: # Parameter:
4285: # height_param
4286: # width_param - Initial picture dimensions.
4287: # scaling - A scale factor.
4288: # parstack, - the current stack of tag attributes
4289: # from the xml parser
4290: # safeeval, - pointer to the safespace
4291: # depth, - from what level in the stack to look for attributes
4292: # (assumes -1 if unspecified)
4293: # cis - look for attrubutes case insensitively
4294: # (assumes false)
4295: #
4296: # Returns:
4297: # height, width - new dimensions.
4298: #
4299: sub resize_image {
4300: my ($height_param, $width_param, $scaling,
4301: $parstack, $safeeval, $depth, $cis) = @_;
4302:
4303: # First apply the scaling...
4304:
4305: $height_param = $height_param * $scaling;
4306: $width_param = $width_param * $scaling;
4307:
4308: #do we have any specified LaTeX size of the picture?
4309: my $toget='TeXwidth';
4310: if ($cis) {
4311: $toget=lc($toget);
4312: }
4313: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4314: $safeeval,$depth,$cis);
4315: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4316: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4317: $safeeval,$depth,$cis);
4318: #do we have any specified web size of the picture?
4319: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4320: $depth,1);
4321: if ($TeXwidth) {
4322: my $old_width_param=$width_param;
4323: if ($TeXwidth=~/(\d+)\s*\%/) {
4324: $width_param = $1*$env{'form.textwidth'}/100;
4325: } else {
4326: $width_param = $TeXwidth;
4327: }
4328: if ($TeXheight) {
4329: $height_param = $TeXheight;
4330: } elsif ($old_width_param) {
4331: $height_param=$TeXwidth/$old_width_param*$height_param;
4332: }
4333: } elsif ($TeXheight) {
4334: $height_param = $TeXheight;
4335: if ($height_param) {
4336: $width_param = $TeXheight/$height_param*$width_param;
4337: }
4338: } elsif ($width) {
4339: my $old_width_param=$width_param;
4340: $width_param = $width*$scaling;
4341: if ($old_width_param) {
4342: $height_param=$width_param/$old_width_param*$height_param;
4343: }
4344: }
4345: if ($width_param > $env{'form.textwidth'}) {
4346: my $old_width_param=$width_param;
4347: $width_param =0.95*$env{'form.textwidth'};
4348: if ($old_width_param) {
4349: $height_param=$width_param/$old_width_param*$height_param;
4350: }
4351: }
4352:
4353: return ($height_param, $width_param);
4354: }
4355:
4356: sub image_size {
4357: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4358:
4359: #size of image from gif/jpg/jpeg/png
4360: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4361: if (-e $ressrc) {
4362: $src = $ressrc;
4363: }
4364: my $image = Image::Magick->new;
4365: my $current_figure = $image->Read($src);
4366: my $width_param = $image->Get('width');
4367: my $height_param = $image->Get('height');
4368: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4369: undef($image);
4370:
4371: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4372: $scaling, $parstack, $safeeval,
4373: $depth, $cis);
4374:
4375: return ($height_param, $width_param);
4376: }
4377:
4378: sub image_width {
4379: my ($height, $width) = &image_size(@_);
4380: return $width;
4381: }
4382: # Not yet 100% sure this is correct in all circumstances..
4383: # due to my uncertainty about mods to image_size.
4384: #
4385: sub image_height {
4386: my ($height, $width) = &image_size(@_);
4387: return $height;
4388: }
4389:
4390: sub get_eps_image {
4391: my ($src)=@_;
4392: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4393:
4394: # In order to prevent the substitution of the alt text, we need to
4395: # be sure the orig_src file is on system now so:
4396:
4397: if (! -e $orig_src) {
4398: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4399: }
4400: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4401: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4402: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4403: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4404: &Apache::lonxml::debug("Filelocation gives: $src");
4405: if (! -e $src) {
4406: &Apache::lonxml::debug("$src does not exist");
4407: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4408: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4409: #if replication failed try to find ps file
4410: $src=~s/\.eps$/\.ps/;
4411: &Apache::lonxml::debug("Now looking for $src");
4412: #if no ps file try to replicate it.
4413: my $didrepcopy = &Apache::lonnet::repcopy($src);
4414: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4415: if ( (not -e $src) ||
4416: ($didrepcopy ne 'ok')) {
4417: &Apache::lonxml::debug("Failed to find or replicate $src");
4418:
4419: #if replication failed try to produce eps file dynamically
4420: $src=~s/\.ps$/\.eps/;
4421: my $temp_file;
4422: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4423: my $newsrc=$orig_src;
4424: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4425: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4426: print FILE ("$newsrc\n");
4427: close(FILE);
4428: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4429: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4430: if ($sext ne "") { # Put the ext. back in to uniquify.
4431: $src =~ s/\.eps$/$sext.eps/;
4432: }
4433:
4434: }
4435:
4436: }
4437: } else {
4438: # If the postscript file has spaces in its name,
4439: # LaTeX will gratuitiously vomit. Therefore
4440: # queue such files for copy with " " replaced by "_".
4441: # printout.pm will know them by their .ps or .eps extensions.
4442: my $newsrc = $orig_src;
4443: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4444: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4445: print FILE "$src\n";
4446: close FILE;
4447: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4448: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4449: }
4450: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4451: $path =~ s/ /\_/g;
4452: $file =~ s/ /\_/g;
4453: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4454: return ($path.'/',$file);
4455: }
4456:
4457: sub eps_generation {
4458: my ($src,$file,$width_param) = @_;
4459: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4460: my $temp_file = Apache::File->new('>>'.$filename);
4461: print $temp_file "$src\n";
4462: my $newsrc = $src;
4463: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4464: $newsrc=~s{/home/httpd/html/res}{};
4465: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4466: $newsrc=~s{/\./}{/};
4467: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4468: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4469: $newsrc=~s{/home/httpd/lonUsers}{};
4470: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4471: }
4472: if ($newsrc=~m{/userfiles/}) {
4473: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4474: } else {
4475: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4476: }
4477: }
4478:
4479: sub file_path {
4480: my $src=shift;
4481: my ($file,$path);
4482: if ($src =~ m!(.*)/([^/]*)$!) {
4483: $file = $2;
4484: $path = $1.'/';
4485: }
4486: return $file,$path;
4487: }
4488: # Converts a measurement in to mm from any of
4489: # the other valid LaTeX units of measure.
4490: # If the units of measure are missing from the
4491: # parameter, it is assumed to be in and returned
4492: # with mm units of measure
4493: sub recalc {
4494: my $argument = shift;
4495: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4496: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4497: my $value=$1;
4498: my $units=$2;
4499: if ($units eq 'cm') {
4500: $value*=10;
4501: } elsif ($units eq 'in') {
4502: $value*=25.4;
4503: } elsif ($units eq 'pc') {
4504: $value*=(25.4*12/72.27);
4505: } elsif ($units eq 'pt') {
4506: $value*=(25.4/72.27);
4507: }
4508: return $value.' mm';
4509: }
4510:
4511: sub LATEX_length {
4512: my $garbage=shift;
4513: $garbage=~s/^\s+$//;
4514: $garbage=~s/^\s+(\S.*)/$1/;#space before
4515: $garbage=~s/(.*\S)\s+$/$1/;#space after
4516: $garbage=~s/(\s)+/$1/;#only one space
4517: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4518: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4519: $garbage=~s/([^\\])\$/$1/g;#$
4520: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4521: $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;
4522: $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;
4523: $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;
4524: $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;
4525: $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;
4526: $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;
4527: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4528: #remove some other LaTeX command
4529: $garbage=~s|\\(\w+)\\|\\|g;
4530: $garbage=~s|\\(\w+)(\s*)|$2|g;
4531: $garbage=~s|\+|11|g;
4532: my $value=length($garbage);
4533: return $value;
4534: }
4535:
4536: # Wrap image 'stuff' inside of the LaTeX required to implement
4537: # alignment:
4538: # align_tex_image(align, latex_rendering, image)
4539: # Where:
4540: # align - The HTML alignment specification.
4541: # latex_rendering - rendering hint for latex.
4542: # image - The LaTeX needed to insert the image itsef.
4543: # width,height - dimensions of the image.
4544: # Returns:
4545: # The 1/2 wrapped image and the stuff required to close the
4546: # wrappage. This allows e.g. randomlabel to insert more stuff
4547: # into the closure.
4548: #
4549: sub align_latex_image {
4550: my ($align, $latex_rendering, $image, $width, $height) = @_;
4551: my $currentstring; # The 1/2 wrapped image.
4552: my $closure; # The closure of the wrappage.
4553:
4554: # if it's none just return it back
4555: if ($latex_rendering eq 'none') {
4556: return ($image,'');
4557: }
4558:
4559: # If there's an alignment specification we need to honor it here.
4560: # For the horizontal alignments, we will also honor the
4561: # value of the latex specfication. The default is parbox,
4562: # and that's used for illegal values too.
4563: #
4564: # Even though we set a default alignment value, the user
4565: # could have given us an illegal value. In that case we
4566: # just use the default alignment of bottom..
4567: $currentstring = "\n% figurewrapping \n";
4568: if ($align eq "top") {
4569: $currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
4570: $closure = '}';
4571: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4572: my $offset = $height/2;
4573: $currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
4574: $closure = '}';
4575: } elsif ($align eq "left") {
4576: if ($latex_rendering eq "parpic") {
4577: $currentstring .= '\parpic[l]{'.$image;
4578: $closure = '}';
4579: } elsif ($latex_rendering eq "parbox") {
4580: $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
4581: .$image;
4582: $closure = '\end{minipage}';
4583: } elsif ($latex_rendering eq "wrapfigure"
4584: || $latex_rendering ne 'none') { # wrapfig render
4585: $currentstring .=
4586: '\begin{wrapfigure}{l}{'.$width.'mm}'
4587: .'\scalebox{1.0}{'.$image;
4588: $closure = '}\end{wrapfigure}';
4589: }
4590: } elsif ($align eq "right") {
4591: if ($latex_rendering eq "parpic") {
4592: $currentstring .= '\parpic[r]{'.$image;
4593: $closure = '}';
4594: } elsif ($latex_rendering eq "parbox") {
4595: $currentstring .= '\begin{minipage}[r]{'.$width.'mm}'
4596: .$image;
4597: $closure = '\end{minipage}';
4598: } elsif ($latex_rendering eq "wrapfigure"
4599: || $latex_rendering ne 'none') { # wrapfig render
4600: $currentstring .=
4601: '\begin{wrapfigure}{r}{'.$width.'mm}'
4602: .'\scalebox{1.0}{'.$image;
4603: $closure = '}\end{wrapfigure}';
4604: }
4605: } else { # Bottom is also default.
4606: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4607: $currentstring .= "{$image";
4608: $closure = '}';
4609: }
4610: $currentstring .= "\n% end wrappage\n";
4611: $closure = "\n% Begin closure\n".$closure."\n% End closure\n";
4612: return ($currentstring, $closure);
4613: }
4614:
4615: # is_inside_of $tagstack $tag
4616: # This sub returns true if the current state of Xml processing
4617: # is inside of the tag.
4618: # Parameters:
4619: # tagstack - The tagstack from the parser.
4620: # tag - The tag (without the <>'s.).
4621: # Sample usage:
4622: # if (is_inside_of($tagstack "table")) {
4623: # # I'm in a table....
4624: # }
4625: sub is_inside_of {
4626: my ($tagstack, $tag) = @_;
4627: my @stack = @$tagstack;
4628: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4629: if ($stack[$i] eq $tag) {
4630: return 1;
4631: }
4632: }
4633: return 0;
4634: }
4635:
4636:
4637: 1;
4638: __END__
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