1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.370 2007/06/26 01:20:35 albertel Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: use 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=$$parstack[$#$parstack]; }
412: if ($args eq '') {
413: &Apache::lonxml::get_all_text("/meta",$parser,$style);
414: } else {
415: $currentstring = $token->[4];
416: }
417: } elsif ($target eq 'meta') {
418: unless (&Apache::lonxml::get_param
419: ('http-equiv',$parstack,$safeeval,undef,1)) {
420: my $name=$token->[2]->{'name'};
421: $name=~tr/A-Z/a-z/;
422: $name=~s/\s/\_/gs;
423: $name=~s/\W//gs;
424: if ($name) {
425: $currentstring='<'.$name;
426: my $display=&Apache::lonxml::get_param
427: ('display',$parstack,$safeeval,undef,1);
428: if ($display) {
429: $display=~s/\"/\'/g;
430: $currentstring.=' display="'.$display.'"';
431: }
432: $currentstring.='>'.
433: &Apache::lonxml::get_param
434: ('content',$parstack,$safeeval,undef,1).
435: '</'.$name.'>';
436: }
437: my $display=&Apache::lonxml::get_param
438: ('display',$parstack,$safeeval,undef,1);
439: if ($display) {
440: $display=&HTML::Entities::encode($display,'<>&"');
441: $currentstring.='<'.$name.'.display>'.$display.
442: '</'.$name.'.display>';
443: }
444: }
445: } elsif ($target eq 'tex') {
446: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
447: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
448: if ((not defined $content) && (not defined $name)) {
449: &Apache::lonxml::startredirection();
450: }
451: }
452: return $currentstring;
453: }
454:
455: sub end_meta {
456: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
457: my $currentstring = '';
458: if ($target eq 'web' || $target eq 'webgrade') {
459: my $args='';
460: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
461: if ($args ne '') {
462: $currentstring = $token->[4];
463: }
464: } elsif ($target eq 'tex') {
465: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
466: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
467: if ((not defined $content) && (not defined $name)) {
468: &Apache::lonxml::endredirection();
469: }
470: }
471: return $currentstring;
472: }
473:
474: # accessrule
475: sub start_accessrule {
476: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
477: my $currentstring = '';
478: my $eff=&Apache::lonxml::get_param
479: ('effect',$parstack,$safeeval,undef,1);
480: my $realm=&Apache::lonxml::get_param
481: ('realm',$parstack,$safeeval,undef,1);
482: my $role=&Apache::lonxml::get_param
483: ('role',$parstack,$safeeval,undef,1);
484: my ($dom,$crs,$sec)=split(/\_/,$realm);
485: $dom = &LONCAPA::clean_domain($dom);
486: my $type=&Apache::lonxml::get_param
487: ('type',$parstack,$safeeval,undef,1);
488: if ($type eq 'user') {
489: $crs = &LONCAPA::clean_username($crs);
490: } else {
491: $crs = &LONCAPA::clean_courseid($crs);
492: }
493: $sec =~s/\W//;
494: $realm = $dom;
495: if ($crs =~ /\S/) { $realm .= '_'.$crs; }
496: if ($sec =~ /\S/) { $realm .= '_'.$sec; }
497: $role=~s/\W//g;
498:
499: if ($target eq 'web') {
500: my $args='';
501: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
502: if ($args eq '') {
503: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
504: } else {
505: $currentstring = $token->[4];
506: }
507: }
508: if ($target eq 'meta') {
509: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
510: }
511: return $currentstring;
512: }
513:
514: sub end_accessrule {
515: my ($target,$token,$tagstack,$parstack,$parser) = @_;
516: my $currentstring = '';
517: if ($target eq 'web') {
518: my $args='';
519: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
520: if ($args ne '') {
521: $currentstring = $token->[4];
522: }
523: }
524: return $currentstring;
525: }
526:
527: sub generate_css_links {
528: my $links;
529: my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
530: if ($css_href =~ /\S/) {
531: &Apache::lonxml::extlink($css_href);
532: $links .=
533: '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
534: }
535: return $links;
536: }
537:
538: #-- <body> tag (end tag required)
539: sub start_body {
540: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
541: my $currentstring = '';
542:
543: if ($target eq 'web' || $target eq 'webgrade') {
544: if ($Apache::lonhomework::parsing_a_problem) {
545: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
546: return '';
547: }
548:
549: if (&is_inside_of($tagstack, "head")) {
550: &end_head(@_);
551: }
552:
553: my $extra_head = &generate_css_links();
554:
555: $currentstring =
556: &Apache::loncommon::start_page($Apache::londefdef::title,
557: $Apache::londefdef::head
558: .$extra_head,
559: {'add_entries' => $token->[2],
560: 'no_title' => 1,
561: 'force_register' => 1});
562:
563: if ($env{'request.state'} ne 'published') {
564: $currentstring.=&Apache::lonmenu::constspaceform();
565: $currentstring.=(<<EDITBUTTON);
566: <form method="post">
567: <input type="submit" name="editmode" accesskey="e" value="Edit" />
568: </form>
569: <br />
570: EDITBUTTON
571: }
572: $currentstring.=&Apache::lonxml::message_location();
573: } elsif ($target eq 'tex') {
574: $currentstring = '\begin{document}';
575: }
576: return $currentstring;
577: }
578:
579: sub end_body {
580: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
581: my $currentstring = &end_p(); # Close off unclosed <p>
582: if ($target eq 'web' || $target eq 'webgrade') {
583: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
584: } elsif ($target eq 'tex') {
585: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
586: }
587: return $currentstring;
588: }
589:
590: # \begin{center} causes a new paragprah spacing that looks odd inside
591: # of a table cell. Same at the end of a \center but with a slightly
592: # larger space .. hence center_correction and center_end_correction.
593: #
594: sub center_correction { return '\vspace*{-6 mm}'; }
595: sub center_end_correction { return '\vspace*{-7 mm}'; }
596:
597: #-- <center> tag (end tag required)
598: sub start_center {
599: my ($target,$token,$tagstack) = @_;
600: my $currentstring = &end_p(); # Close off any prior para.
601: if ($target eq 'web' || $target eq 'webgrade') {
602: $currentstring .= $token->[4];
603: } elsif ($target eq 'tex') {
604: if (&is_inside_of($tagstack, "table")) {
605: $currentstring .= ¢er_correction();
606: }
607: $currentstring .= '\begin{center}';
608: }
609: return $currentstring;
610: }
611:
612: sub end_center {
613: my ($target,$token,$tagstack) = @_;
614: my $currentstring = '';
615: if ($target eq 'web' || $target eq 'webgrade') {
616: $currentstring = $token->[2];
617: } elsif ($target eq 'tex') {
618: $currentstring = '\end{center}';
619: if (&is_inside_of($tagstack, "table")) {
620: $currentstring .= ¢er_end_correction();
621: }
622: }
623: return $currentstring;
624: }
625:
626: #-- <b> tag (end tag required)
627: # NOTE: In TeX mode disables internal <p>
628: sub start_b {
629: my ($target,$token) = @_;
630: my $currentstring = '';
631: if ($target eq 'web' || $target eq 'webgrade') {
632: $currentstring = $token->[4];
633: } elsif ($target eq 'tex') {
634: &disable_para();
635: $currentstring .= '\textbf{';
636: }
637: return $currentstring;
638: }
639:
640: sub end_b {
641: my ($target,$token) = @_;
642: my $currentstring = '';
643: if ($target eq 'web' || $target eq 'webgrade') {
644: $currentstring = $token->[2];
645: } elsif ($target eq 'tex') {
646: &enable_para();
647: $currentstring = '}';
648: }
649: return $currentstring;
650: }
651:
652: #-- <strong> tag (end tag required)
653: # NOTE: in TeX mode disables internal <p>
654: sub start_strong {
655: my ($target,$token) = @_;
656: my $currentstring = '';
657: if ($target eq 'web' || $target eq 'webgrade') {
658: $currentstring = $token->[4];
659: } elsif ($target eq 'tex') {
660: &disable_para();
661: $currentstring = '\textbf{';
662: }
663: return $currentstring;
664: }
665:
666: sub end_strong {
667: my ($target,$token) = @_;
668: my $currentstring = '';
669: if ($target eq 'web' || $target eq 'webgrade') {
670: $currentstring = $token->[2];
671: } elsif ($target eq 'tex') {
672: &enable_para();
673: $currentstring = '}';
674: }
675: return $currentstring;
676: }
677:
678: #-- <h1> tag (end tag required)
679: sub start_h1 {
680: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
681: my $currentstring = &end_p(); # Close off any prior para.
682: if ($target eq 'web' || $target eq 'webgrade') {
683: $currentstring .= $token->[4];
684: } elsif ($target eq 'tex') {
685: my $pre;
686: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
687: if ($align eq 'center') {
688: $pre='\begin{center}';
689: } elsif ($align eq 'left') {
690: $pre='\rlap{';
691: } elsif ($align eq 'right') {
692: $pre=' \hfill \llap{';
693: }
694: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
695: if (not defined $TeXsize) {$TeXsize="large";}
696: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
697: } elsif ($target eq 'meta') {
698: $currentstring.='<subject>';
699: &start_output($target);
700: }
701: return $currentstring;
702: }
703:
704: sub end_h1 {
705: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
706: my $currentstring = '';
707: if ($target eq 'web' || $target eq 'webgrade') {
708: $currentstring .= $token->[2];
709: } elsif ($target eq 'tex') {
710: my $post='\vskip 0 mm ';
711: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
712: if ($align eq 'center') {
713: $post='\end{center}';
714: } elsif ($align eq 'left') {
715: $post='} \hfill'.'\vskip 0 mm ';
716: } elsif ($align eq 'right') {
717: $post='}'.'\vskip 0 mm ';
718: }
719: $currentstring .= '}}'.$post;
720: } elsif ($target eq 'meta') {
721: &end_output($target);
722: $currentstring='</subject>';
723: }
724: return $currentstring;
725: }
726:
727: #-- <h2> tag
728: sub start_h2 {
729: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
730: my $currentstring = &end_p(); # Close off any prior para.
731: if ($target eq 'web' || $target eq 'webgrade') {
732: $currentstring .= $token->[4];
733: } elsif ($target eq 'tex') {
734: my $pre;
735: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
736: if ($align eq 'center') {
737: $pre='\begin{center}';
738: } elsif ($align eq 'left') {
739: $pre='\rlap{';
740: } elsif ($align eq 'right') {
741: $pre=' \hfill \llap{';
742: }
743: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
744: if (not defined $TeXsize) {$TeXsize="large";}
745: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
746: }
747: return $currentstring;
748: }
749:
750: sub end_h2 {
751: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
752: my $currentstring = '';
753: if ($target eq 'web' || $target eq 'webgrade') {
754: $currentstring .= $token->[2];
755: } elsif ($target eq 'tex') {
756: my $post='\vskip 0 mm ';
757: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
758: if ($align eq 'center') {
759: $post='\end{center}';
760: } elsif ($align eq 'left') {
761: $post='} \hfill'.'\vskip 0 mm ';
762: } elsif ($align eq 'right') {
763: $post='}'.'\vskip 0 mm ';
764: }
765: $currentstring .= '}}'.$post;
766: }
767: return $currentstring;
768: }
769:
770: #-- <h3> tag
771: sub start_h3 {
772: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
773: my $currentstring = &end_p(); # Close off any prior para.
774: if ($target eq 'web' || $target eq 'webgrade') {
775: $currentstring .= $token->[4];
776: } elsif ($target eq 'tex') {
777: my $pre;
778: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
779: if ($align eq 'center') {
780: $pre='\begin{center}';
781: } elsif ($align eq 'left') {
782: $pre='\rlap{';
783: } elsif ($align eq 'right') {
784: $pre=' \hfill \llap{';
785: }
786: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
787: if (not defined $TeXsize) {$TeXsize="large";}
788: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
789: }
790: return $currentstring;
791: }
792:
793: sub end_h3 {
794: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
795: my $currentstring = '';
796: if ($target eq 'web' || $target eq 'webgrade') {
797: $currentstring .= $token->[2];
798: } elsif ($target eq 'tex') {
799: my $post='\vskip 0 mm ';
800: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
801: if ($align eq 'center') {
802: $post='\end{center}';
803: } elsif ($align eq 'left') {
804: $post='} \hfill'.'\vskip 0 mm ';
805: } elsif ($align eq 'right') {
806: $post='}'.'\vskip 0 mm ';
807: }
808: $currentstring .= '}}'.$post;
809: }
810: return $currentstring;
811: }
812:
813: #-- <h4> tag
814: sub start_h4 {
815: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
816: my $currentstring = &end_p(); # Close off any prior para.
817: if ($target eq 'web' || $target eq 'webgrade') {
818: $currentstring .= $token->[4];
819: } elsif ($target eq 'tex') {
820: my $pre;
821: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
822: if ($align eq 'center') {
823: $pre='\begin{center}';
824: } elsif ($align eq 'left') {
825: $pre='\rlap{';
826: } elsif ($align eq 'right') {
827: $pre=' \hfill \llap{';
828: }
829: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
830: if (not defined $TeXsize) {$TeXsize="large";}
831: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
832: }
833: return $currentstring;
834: }
835:
836: sub end_h4 {
837: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
838: my $currentstring = '';
839: if ($target eq 'web' || $target eq 'webgrade') {
840: $currentstring .= $token->[2];
841: } elsif ($target eq 'tex') {
842: my $post='\vskip 0 mm ';
843: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
844: if ($align eq 'center') {
845: $post='\end{center}';
846: } elsif ($align eq 'left') {
847: $post='} \hfill'.'\vskip 0 mm ';
848: } elsif ($align eq 'right') {
849: $post='}'.'\vskip 0 mm ';
850: }
851: $currentstring .= '}}'.$post;
852: }
853: return $currentstring;
854: }
855:
856: #-- <h5> tag
857: sub start_h5 {
858: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
859: my $currentstring = &end_p(); # Close off any prior paras.
860: if ($target eq 'web' || $target eq 'webgrade') {
861: $currentstring .= $token->[4];
862: } elsif ($target eq 'tex') {
863: my $pre;
864: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
865: if ($align eq 'center') {
866: $pre='\begin{center}';
867: } elsif ($align eq 'left') {
868: $pre='\rlap{';
869: } elsif ($align eq 'right') {
870: $pre=' \hfill \llap{';
871: }
872: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
873: if (not defined $TeXsize) {$TeXsize="large";}
874: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
875: }
876: return $currentstring;
877: }
878:
879: sub end_h5 {
880: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
881: my $currentstring = '';
882: if ($target eq 'web' || $target eq 'webgrade') {
883: $currentstring .= $token->[2];
884: } elsif ($target eq 'tex') {
885: my $post='\vskip 0 mm ';
886: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
887: if ($align eq 'center') {
888: $post='\end{center}';
889: } elsif ($align eq 'left') {
890: $post='} \hfill'.'\vskip 0 mm ';
891: } elsif ($align eq 'right') {
892: $post='}'.'\vskip 0 mm ';
893: }
894: $currentstring .= '}}'.$post;
895: }
896: return $currentstring;
897: }
898:
899: #-- <h6> tag
900: sub start_h6 {
901: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
902: my $currentstring = &end_p(); # Close off any prior paras.
903: if ($target eq 'web' || $target eq 'webgrade') {
904: $currentstring .= $token->[4];
905: } elsif ($target eq 'tex') {
906: my $pre;
907: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
908: if ($align eq 'center') {
909: $pre='\begin{center}';
910: } elsif ($align eq 'left') {
911: $pre='\rlap{';
912: } elsif ($align eq 'right') {
913: $pre=' \hfill \llap{';
914: }
915: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
916: if (not defined $TeXsize) {$TeXsize="large";}
917: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
918: }
919: return $currentstring;
920: }
921:
922: sub end_h6 {
923: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
924: my $currentstring = '';
925: if ($target eq 'web' || $target eq 'webgrade') {
926: $currentstring .= $token->[2];
927: } elsif ($target eq 'tex') {
928: my $post='\vskip 0 mm ';
929: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
930: if ($align eq 'center') {
931: $post='\end{center}';
932: } elsif ($align eq 'left') {
933: $post='} \hfill'.'\vskip 0 mm ';
934: } elsif ($align eq 'right') {
935: $post='}'.'\vskip 0 mm ';
936: }
937: $currentstring .= '}}'.$post;
938: }
939: return $currentstring;
940: }
941:
942: #--- <cite> tag (end tag required)
943: sub start_cite {
944: my ($target,$token) = @_;
945: my $currentstring = '';
946: if ($target eq 'web' || $target eq 'webgrade') {
947: $currentstring .= $token->[4];
948: } elsif ($target eq 'tex') {
949: $currentstring .= '\textit{';
950: }
951: return $currentstring;
952: }
953:
954: sub end_cite {
955: my ($target,$token) = @_;
956: my $currentstring = '';
957: if ($target eq 'web' || $target eq 'webgrade') {
958: $currentstring .= $token->[2];
959: } elsif ($target eq 'tex') {
960: $currentstring .= '}';
961: }
962: return $currentstring;
963: }
964:
965: #-- <i> tag (end tag required)
966: sub start_i {
967: my ($target,$token) = @_;
968: my $currentstring = '';
969: if ($target eq 'web' || $target eq 'webgrade') {
970: $currentstring .= $token->[4];
971: } elsif ($target eq 'tex') {
972: $currentstring .= '\textit{';
973: }
974: return $currentstring;
975: }
976:
977: sub end_i {
978: my ($target,$token) = @_;
979: my $currentstring = '';
980: if ($target eq 'web' || $target eq 'webgrade') {
981: $currentstring .= $token->[2];
982: } elsif ($target eq 'tex') {
983: $currentstring .= '}';
984: }
985: return $currentstring;
986: }
987:
988: #-- <address> tag (end tag required)
989: sub start_address {
990: my ($target,$token) = @_;
991: my $currentstring = '';
992: if ($target eq 'web' || $target eq 'webgrade') {
993: $currentstring .= $token->[4];
994: } elsif ($target eq 'tex') {
995: $currentstring .= '\textit{';
996: }
997: return $currentstring;
998: }
999:
1000: sub end_address {
1001: my ($target,$token) = @_;
1002: my $currentstring = '';
1003: if ($target eq 'web' || $target eq 'webgrade') {
1004: $currentstring .= $token->[2];
1005: } elsif ($target eq 'tex') {
1006: $currentstring .= '}';
1007: }
1008: return $currentstring;
1009: }
1010:
1011: #-- <dfn> tag (end tag required)
1012: sub start_dfn {
1013: my ($target,$token) = @_;
1014: my $currentstring = '';
1015: if ($target eq 'web' || $target eq 'webgrade') {
1016: $currentstring .= $token->[4];
1017: } elsif ($target eq 'tex') {
1018: $currentstring .= '\textit{';
1019: }
1020: return $currentstring;
1021: }
1022:
1023: sub end_dfn {
1024: my ($target,$token) = @_;
1025: my $currentstring = '';
1026: if ($target eq 'web' || $target eq 'webgrade') {
1027: $currentstring .= $token->[2];
1028: } elsif ($target eq 'tex') {
1029: $currentstring .= '}';
1030: }
1031: return $currentstring;
1032: }
1033:
1034: #-- <tt> tag (end tag required)
1035: sub start_tt {
1036: my ($target,$token) = @_;
1037: my $currentstring = '';
1038: if ($target eq 'web' || $target eq 'webgrade') {
1039: $currentstring .= $token->[4];
1040: } elsif ($target eq 'tex') {
1041: $currentstring .= '\texttt{';
1042: }
1043: return $currentstring;
1044: }
1045:
1046: sub end_tt {
1047: my ($target,$token) = @_;
1048: my $currentstring = '';
1049: if ($target eq 'web' || $target eq 'webgrade') {
1050: $currentstring .= $token->[2];
1051: } elsif ($target eq 'tex') {
1052: $currentstring .= '}';
1053: }
1054: return $currentstring;
1055: }
1056:
1057: #-- <kbd> tag (end tag required)
1058: sub start_kbd {
1059: my ($target,$token) = @_;
1060: my $currentstring = '';
1061: if ($target eq 'web' || $target eq 'webgrade') {
1062: $currentstring .= $token->[4];
1063: } elsif ($target eq 'tex') {
1064: $currentstring .= '\texttt{';
1065: }
1066: return $currentstring;
1067: }
1068:
1069: sub end_kbd {
1070: my ($target,$token) = @_;
1071: my $currentstring = '';
1072: if ($target eq 'web' || $target eq 'webgrade') {
1073: $currentstring .= $token->[2];
1074: } elsif ($target eq 'tex') {
1075: $currentstring .= '}';
1076: }
1077: return $currentstring;
1078: }
1079:
1080: #-- <code> tag (end tag required)
1081: sub start_code {
1082: my ($target,$token) = @_;
1083: my $currentstring = '';
1084: if ($target eq 'web' || $target eq 'webgrade') {
1085: $currentstring .= $token->[4];
1086: } elsif ($target eq 'tex') {
1087: $currentstring .= '\texttt{';
1088: }
1089: return $currentstring;
1090: }
1091:
1092: sub end_code {
1093: my ($target,$token) = @_;
1094: my $currentstring = '';
1095: if ($target eq 'web' || $target eq 'webgrade') {
1096: $currentstring .= $token->[2];
1097: } elsif ($target eq 'tex') {
1098: $currentstring .= '}';
1099: }
1100: return $currentstring;
1101: }
1102:
1103: #-- <em> tag (end tag required)
1104: sub start_em {
1105: my ($target,$token) = @_;
1106: my $currentstring = '';
1107: if ($target eq 'web' || $target eq 'webgrade') {
1108: $currentstring .= $token->[4];
1109: } elsif ($target eq 'tex') {
1110: $currentstring .= '\emph{';
1111: }
1112: return $currentstring;
1113: }
1114:
1115: sub end_em {
1116: my ($target,$token) = @_;
1117: my $currentstring = '';
1118: if ($target eq 'web' || $target eq 'webgrade') {
1119: $currentstring .= $token->[2];
1120: } elsif ($target eq 'tex') {
1121: $currentstring .= '}';
1122: }
1123: return $currentstring;
1124: }
1125:
1126: #-- <q> tag (end tag required)
1127: sub start_q {
1128: my ($target,$token) = @_;
1129: my $currentstring = '';
1130: if ($target eq 'web' || $target eq 'webgrade') {
1131: $currentstring .= $token->[4];
1132: } elsif ($target eq 'tex') {
1133: $currentstring .= '\emph{';
1134: }
1135: return $currentstring;
1136: }
1137:
1138: sub end_q {
1139: my ($target,$token) = @_;
1140: my $currentstring = '';
1141: if ($target eq 'web' || $target eq 'webgrade') {
1142: $currentstring .= $token->[2];
1143: } elsif ($target eq 'tex') {
1144: $currentstring .= '}';
1145: }
1146: return $currentstring;
1147: }
1148:
1149: # <p> is a bit strange since it does not require a closing </p>
1150: # However in latex, we must often output closing stuff to end
1151: # environments and {}'s etc. Therefore we do all the work
1152: # of figuring out the ending strings in the start tag processing,
1153: # and provide a mechanism to output the stop text external
1154: # to tag processing.
1155: #
1156: {
1157:
1158: my $closing_string = ''; # String required to close <p>
1159:
1160: # Some tags are <p> fragile meaning that <p> inside of them
1161: # does not work within TeX mode. This is managed via the
1162: # counter below:
1163: #
1164:
1165: my $para_disabled = 0;
1166:
1167: sub disable_para {
1168: $para_disabled++;
1169: }
1170: sub enable_para {
1171: $para_disabled--;
1172: }
1173:
1174:
1175: #-- <p> tag (end tag optional)
1176: #optional attribute - align="center|left|right"
1177: sub start_p {
1178: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1179: my $currentstring = '';
1180: if ($target eq 'web' || $target eq 'webgrade') {
1181: $currentstring .= &end_p(); # close off prior para if in progress.
1182: $currentstring .= $token->[4];
1183: if (! ($currentstring =~ /\//)) {
1184: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1185: }
1186: } elsif ($target eq 'tex' && !$para_disabled) {
1187:
1188: $currentstring .= &end_p(); # close off prior para if in progress.
1189: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1190: if ($align eq 'center') {
1191: $currentstring .='\begin{center}\par ';
1192: $closing_string = '\end{center}';
1193: if (&is_inside_of($tagstack, "table")) {
1194: $currentstring = ¢er_correction().$currentstring;
1195: }
1196: } elsif ($align eq 'right') {
1197: $currentstring.="\n".'{\flushright ';
1198: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1199: $closing_string= "}\n";
1200: } elsif ($align eq 'left') {
1201: $currentstring.= "\n".'{\flushleft ';
1202: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1203: $closing_string = "}\n";
1204: } else {
1205: $currentstring.='\par ';
1206: if (&is_inside_of($tagstack, 'table')) {
1207: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1208: } else {
1209: $closing_string = '\strut\\\\\strut ';
1210: }
1211: }
1212:
1213: }
1214: return $currentstring;
1215: }
1216: #
1217: # End paragraph processing just requires that we output the
1218: # closing string that was saved and blank it.
1219: sub end_p {
1220: # Note only 'tex' mode uses disable_para and enable_para
1221: # so we don't need to know the target in the check below:
1222:
1223: if (!$para_disabled) {
1224: my $current_string = $closing_string;
1225: $closing_string = ''; # Not in a para anymore.
1226: return $current_string;
1227: } else {
1228: return '';
1229: }
1230:
1231: }
1232: }
1233: #-- <br> tag (end tag forbidden)
1234: sub start_br {
1235: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1236: my $currentstring = '';
1237: if ($target eq 'web' || $target eq 'webgrade') {
1238: $currentstring .= $token->[4];
1239: } elsif ($target eq 'tex') {
1240: my @tempo=@$tagstack;
1241: my $signal=0;
1242: # Not going to factor this to is_inside_of since that would require
1243: # multiple stack traversals.
1244: #
1245: for (my $i=$#tempo;$i>=0;$i--) {
1246: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1247: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1248: $signal=1;
1249: }
1250: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1251: $signal = 1;
1252: }
1253: }
1254: if ($signal eq 1) {
1255: $currentstring .= ' \vskip 0 mm ';
1256: } else {
1257: $currentstring .= '\strut \\\\ \strut ';
1258: }
1259:
1260: }
1261: return $currentstring;
1262: }
1263:
1264: sub end_br {
1265: my ($target,$token) = @_;
1266: my $currentstring = '';
1267: if ($target eq 'web' || $target eq 'webgrade') {
1268: $currentstring .= $token->[2];
1269: }
1270: return $currentstring;
1271: }
1272:
1273: #-- <big> tag (end tag required)
1274: sub start_big {
1275: my ($target,$token) = @_;
1276: my $currentstring = '';
1277: if ($target eq 'web' || $target eq 'webgrade') {
1278: $currentstring .= $token->[4];
1279: } elsif ($target eq 'tex') {
1280: $currentstring .= '{\large ';
1281: }
1282: return $currentstring;
1283: }
1284:
1285: sub end_big {
1286: my ($target,$token) = @_;
1287: my $currentstring = '';
1288: if ($target eq 'web' || $target eq 'webgrade') {
1289: $currentstring .= $token->[2];
1290: } elsif ($target eq 'tex') {
1291: $currentstring .= '}';
1292: }
1293: return $currentstring;
1294: }
1295:
1296: #-- <small> tag (end tag required)
1297: sub start_small {
1298: my ($target,$token) = @_;
1299: my $currentstring = '';
1300: if ($target eq 'web' || $target eq 'webgrade') {
1301: $currentstring .= $token->[4];
1302: } elsif ($target eq 'tex') {
1303: $currentstring .= '{\footnotesize ';
1304: }
1305: return $currentstring;
1306: }
1307:
1308: sub end_small {
1309: my ($target,$token) = @_;
1310: my $currentstring = '';
1311: if ($target eq 'web' || $target eq 'webgrade') {
1312: $currentstring .= $token->[2];
1313: } elsif ($target eq 'tex') {
1314: $currentstring .= '}';
1315: }
1316: return $currentstring;
1317: }
1318:
1319: #-- <basefont> tag (end tag forbidden)
1320: sub start_basefont {
1321: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1322: my $currentstring = '';
1323: if ($target eq 'web' || $target eq 'webgrade') {
1324: $currentstring = $token->[4];
1325: } elsif ($target eq 'tex') {
1326: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1327: if (defined $basesize) {
1328: $currentstring = '{\\'.$basesize.' ';
1329: }
1330: }
1331: return $currentstring;
1332: }
1333:
1334: sub end_basefont {
1335: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1336: my $currentstring = '';
1337: if ($target eq 'web' || $target eq 'webgrade') {
1338: $currentstring = $token->[4];
1339: } elsif ($target eq 'tex') {
1340: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1341: if (defined $basesize) {
1342: $currentstring = '}';
1343: }
1344: }
1345: return $currentstring;
1346: }
1347:
1348: #-- <font> tag (end tag required)
1349: sub start_font {
1350: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1351: my $currentstring = '';
1352: if ($target eq 'web' || $target eq 'webgrade') {
1353: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1354: if ($face!~/symbol/i) {
1355: if (($env{'browser.fontenhance'} eq 'on') ||
1356: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1357: }
1358: $currentstring = $token->[4];
1359: } elsif ($target eq 'tex') {
1360: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1361: if (defined $fontsize) {
1362: $currentstring = '{\\'.$fontsize.' ';
1363: }
1364: }
1365: return $currentstring;
1366: }
1367:
1368: sub end_font {
1369: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1370: my $currentstring = '';
1371: if ($target eq 'web' || $target eq 'webgrade') {
1372: $currentstring = $token->[2];
1373: } elsif ($target eq 'tex') {
1374: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1375: if (defined $fontsize) {
1376: $currentstring = '}';
1377: }
1378: }
1379: return $currentstring;
1380: }
1381:
1382: #-- <strike> tag (end tag required)
1383: sub start_strike {
1384: my ($target,$token) = @_;
1385: my $currentstring = '';
1386: if ($target eq 'web' || $target eq 'webgrade') {
1387: $currentstring .= $token->[4];
1388: } elsif ($target eq 'tex') {
1389: &Apache::lonxml::startredirection();
1390: }
1391: return $currentstring;
1392: }
1393:
1394: sub end_strike {
1395: my ($target,$token) = @_;
1396: my $currentstring = '';
1397: if ($target eq 'web' || $target eq 'webgrade') {
1398: $currentstring .= $token->[2];
1399: } elsif ($target eq 'tex') {
1400: $currentstring=&Apache::lonxml::endredirection();
1401: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1402: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1403: $currentstring=~s/(\S)\s*$/$1\}/;
1404: }
1405: return $currentstring;
1406: }
1407:
1408: #-- <s> tag (end tag required)
1409: sub start_s {
1410: my ($target,$token) = @_;
1411: my $currentstring = '';
1412: if ($target eq 'web' || $target eq 'webgrade') {
1413: $currentstring .= $token->[4];
1414: } elsif ($target eq 'tex') {
1415: &Apache::lonxml::startredirection();
1416: }
1417: return $currentstring;
1418: }
1419:
1420: sub end_s {
1421: my ($target,$token) = @_;
1422: my $currentstring = '';
1423: if ($target eq 'web' || $target eq 'webgrade') {
1424: $currentstring .= $token->[2];
1425: } elsif ($target eq 'tex') {
1426: $currentstring=&Apache::lonxml::endredirection();
1427: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1428: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1429: $currentstring=~s/(\S)\s*$/$1\}/;
1430: }
1431: return $currentstring;
1432: }
1433:
1434: #-- <sub> tag (end tag required)
1435: sub start_sub {
1436: my ($target,$token) = @_;
1437: my $currentstring = '';
1438: if ($target eq 'web' || $target eq 'webgrade') {
1439: $currentstring .= $token->[4];
1440: } elsif ($target eq 'tex') {
1441: $currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1442: }
1443: return $currentstring;
1444: }
1445:
1446: sub end_sub {
1447: my ($target,$token) = @_;
1448: my $currentstring = '';
1449: if ($target eq 'web' || $target eq 'webgrade') {
1450: $currentstring .= $token->[2];
1451: } elsif ($target eq 'tex') {
1452: $currentstring .= '}}';
1453: }
1454: return $currentstring;
1455: }
1456:
1457: #-- <sup> tag (end tag required)
1458: sub start_sup {
1459: my ($target,$token) = @_;
1460: my $currentstring = '';
1461: if ($target eq 'web' || $target eq 'webgrade') {
1462: $currentstring .= $token->[4];
1463: } elsif ($target eq 'tex') {
1464: $currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1465: }
1466: return $currentstring;
1467: }
1468:
1469: sub end_sup {
1470: my ($target,$token) = @_;
1471: my $currentstring = '';
1472: if ($target eq 'web' || $target eq 'webgrade') {
1473: $currentstring .= $token->[2];
1474: } elsif ($target eq 'tex') {
1475: $currentstring .= '}}';
1476: }
1477: return $currentstring;
1478: }
1479:
1480: #-- <hr> tag (end tag forbidden)
1481: sub start_hr {
1482: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1483: my $currentstring = &end_p(); # End enclosing para.
1484: if ($target eq 'web' || $target eq 'webgrade') {
1485: $currentstring .= $token->[4];
1486: } elsif ($target eq 'tex') {
1487:
1488: # <hr /> can't be inside of <sup><sub> thank you LaTeX.
1489: #
1490: my $restart_sub = 0;
1491: my $restart_sup = 0;
1492:
1493: # Since <sub> and <sup> are simple tags it's ok to turn off/on
1494: # using the start_ stop_ functions.. those tags only care about
1495: # $target.
1496:
1497: if (&is_inside_of($tagstack, "sub")) {
1498: $restart_sub = 1;
1499: $currentstring .= &end_sub($target, $token, $tagstack,
1500: $parstack, $parser, $safeeval);
1501: }
1502: if (&is_inside_of($tagstack, "sup")) {
1503: $restart_sup = 1;
1504: $currentstring .= &end_sup($target, $token, $tagstack,
1505: $parstack, $parser, $safeeval);
1506: }
1507:
1508: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1509: if (defined $LaTeXwidth) {
1510: if ($LaTeXwidth=~/^%/) {
1511: substr($LaTeXwidth,0,1)='';
1512: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1513: }
1514: } else {
1515: $LaTeXwidth ='0.9\textwidth';
1516: }
1517: my ($pre,$post);
1518: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1519: if (($align eq 'center') || (not defined $align)) {
1520: $pre=''; $post='';
1521: } elsif ($align eq 'left') {
1522: $pre='\rlap{'; $post='} \hfill';
1523: } elsif ($align eq 'right') {
1524: $pre=' \hfill \llap{'; $post='}';
1525: }
1526: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1527: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1528: # Turn stuff back on that we can't be inside of.
1529:
1530: if ($restart_sub) {
1531: $currentstring .= &start_sub($target, $token, $tagstack,
1532: $parstack, $parser, $safeeval);
1533: }
1534: if ($restart_sup) {
1535: $currentstring .= &start_sup($target, $token, $tagstack,
1536: $parstack, $parser, $safeeval);
1537: }
1538: }
1539: return $currentstring;
1540: }
1541:
1542: sub end_hr {
1543: my ($target,$token) = @_;
1544: my $currentstring = '';
1545: if ($target eq 'web' || $target eq 'webgrade') {
1546: $currentstring .= $token->[2];
1547: }
1548: return $currentstring;
1549: }
1550:
1551: #-- <div> tag (end tag required)
1552: {
1553:
1554: # Since div can be nested, the stack below is used
1555: # in 'tex' mode to store the ending strings
1556: # for the div stack.
1557:
1558: my @div_end_stack;
1559:
1560: sub start_div {
1561: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1562: my $currentstring = &end_p(); # Close enclosing para.
1563: if ($target eq 'web' || $target eq 'webgrade') {
1564: $currentstring .= $token->[4];
1565: }
1566: if ($target eq 'tex') {
1567: # 4 possible alignments: left, right, center, and -missing-.
1568:
1569: my $endstring = '';
1570:
1571: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1572: $safeeval, undef, 1));
1573: if ($align eq 'center') {
1574: $currentstring .= '\begin{center}';
1575: $endstring = '\end{center}';
1576: if (&is_inside_of($tagstack, "table")) {
1577: $currentstring = ¢er_correction().$currentstring;
1578: }
1579: }
1580: elsif ($align eq 'right') {
1581: $currentstring .= '\begin{flushright}';
1582: $endstring .= '\end{flushright}';
1583: } elsif ($align eq 'left') {
1584: $currentstring .= '\begin{flushleft}';
1585: $endstring = '\end{flushleft}';
1586: } else {
1587:
1588: }
1589: $currentstring .= "\n"; # For human readability.
1590: $endstring = "\n$endstring\n"; # For human readability
1591: push(@div_end_stack, $endstring);
1592: }
1593: return $currentstring;
1594: }
1595:
1596: sub end_div {
1597: my ($target,$token) = @_;
1598: my $currentstring = '';
1599: if ($target eq 'web' || $target eq 'webgrade') {
1600: $currentstring .= $token->[2];
1601: }
1602: if ($target eq 'tex') {
1603: my $endstring = pop @div_end_stack;
1604: $currentstring .= $endstring;
1605: }
1606: return $currentstring;
1607: }
1608: }
1609:
1610: #-- <a> tag (end tag required)
1611: sub start_a {
1612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1613: my $currentstring = '';
1614: if ($target eq 'web' || $target eq 'webgrade') {
1615: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1616: undef,1);
1617: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1618: }
1619: return $currentstring;
1620: }
1621:
1622: sub end_a {
1623: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1624: my $currentstring = '';
1625: if ($target eq 'web' || $target eq 'webgrade') {
1626: $currentstring .= $token->[2];
1627: }
1628: if ($target eq 'tex') {
1629: my $href =
1630: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1631: my $name =
1632: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1633: if ($href =~ /\S/) {
1634: $href =~ s/([^\\])%/$1\\\%/g;
1635: # Substitute special symbols... and allow line breaks at each /
1636: #
1637: $href = &Apache::lonxml::latex_special_symbols($href);
1638: $href =~ s/\//\/\\-/g; # Map / to /\- to allow hyphenation.
1639: $currentstring .= ' ({\tt URI:'.$href.'})';
1640: } elsif ($name =~ /\S/) {
1641: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1642: } else {
1643: $currentstring.='';
1644: }
1645: }
1646: return $currentstring;
1647: }
1648:
1649: #-- <li> tag (end tag optional)
1650: sub start_li {
1651: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1652: my $currentstring = '';
1653: if ($target eq 'web' || $target eq 'webgrade') {
1654: $currentstring = $token->[4];
1655: } elsif ($target eq 'tex') {
1656: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1657: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1658: #FIXME need to support types i and I
1659: if ($type=~/disc/) {
1660: $currentstring .= ' \item[$\bullet$] ';
1661: } elsif ($type=~/circle/) {
1662: $currentstring .= ' \item[$\circ$] ';
1663: } elsif ($type=~/square/) {
1664: $currentstring .= ' \item[$\diamond$] ';
1665: } elsif ($type eq '1') {
1666: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1667: } elsif ($type eq 'A') {
1668: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1669: } elsif ($type eq 'a') {
1670: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1671: } elsif ($value ne '') {
1672: $currentstring .= ' \item['.$value.'] ';
1673: } else {
1674: $currentstring .= ' \item ';
1675: }
1676: $Apache::londefdef::list_index++;
1677: }
1678: return $currentstring;
1679: }
1680:
1681: sub end_li {
1682: my ($target,$token) = @_;
1683: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1684: if ($target eq 'web' || $target eq 'webgrade') {
1685: $currentstring .= $token->[2];
1686: }
1687: return $currentstring;
1688: }
1689:
1690: #-- <u> tag (end tag required)
1691: sub start_u {
1692: my ($target,$token) = @_;
1693: my $currentstring = '';
1694: if ($target eq 'web' || $target eq 'webgrade') {
1695: $currentstring .= $token->[4];
1696: } elsif ($target eq 'tex') {
1697: &Apache::lonxml::startredirection();
1698: }
1699: return $currentstring;
1700: }
1701:
1702: sub end_u {
1703: my ($target,$token) = @_;
1704: my $currentstring = '';
1705: if ($target eq 'web' || $target eq 'webgrade') {
1706: $currentstring .= $token->[2];
1707: } elsif ($target eq 'tex') {
1708: $currentstring=&Apache::lonxml::endredirection();
1709: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1710: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1711: $currentstring=~s/(\S)\s*$/$1\}/;
1712: }
1713: return $currentstring;
1714: }
1715:
1716: #-- <ul> tag (end tag required)
1717: sub start_ul {
1718: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1719: my $currentstring = &end_p(); # Close off enclosing list.
1720: if ($target eq 'web' || $target eq 'webgrade') {
1721: $currentstring .= $token->[4];
1722: } elsif ($target eq 'tex') {
1723: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1724: $Apache::londefdef::list_index=0;
1725: if ($TeXtype eq 'disc') {
1726: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1727: '\renewcommand{\labelitemii}{$\bullet$}'.
1728: '\renewcommand{\labelitemiii}{$\bullet$}'.
1729: '\renewcommand{\labelitemiv}{$\bullet$}';
1730: } elsif ($TeXtype eq 'circle') {
1731: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1732: '\renewcommand{\labelitemii}{$\circ$}'.
1733: '\renewcommand{\labelitemiii}{$\circ$}'.
1734: '\renewcommand{\labelitemiv}{$\circ$}';
1735: } elsif ($TeXtype eq 'square') {
1736: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1737: '\renewcommand{\labelitemii}{$\diamond$}'.
1738: '\renewcommand{\labelitemiii}{$\diamond$}'.
1739: '\renewcommand{\labelitemiv}{$\diamond$}';
1740: }
1741: $currentstring .= '\strut \begin{itemize}';
1742: }
1743: return $currentstring;
1744: }
1745:
1746: sub end_ul {
1747: my ($target,$token) = @_;
1748: my $currentstring = '';
1749: if ($target eq 'web' || $target eq 'webgrade') {
1750: $currentstring = $token->[2];
1751: } elsif ($target eq 'tex') {
1752: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1753: '\renewcommand{\labelitemii}{$\bullet$}'.
1754: '\renewcommand{\labelitemiii}{$\bullet$}'.
1755: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1756: }
1757: return $currentstring;
1758: }
1759:
1760: #-- <menu> tag (end tag required)
1761: sub start_menu {
1762: my ($target,$token) = @_;
1763: my $currentstring = '';
1764: if ($target eq 'web' || $target eq 'webgrade') {
1765: $currentstring = $token->[4];
1766: } elsif ($target eq 'tex') {
1767: $currentstring = " \\begin{itemize} ";
1768: }
1769: return $currentstring;
1770: }
1771:
1772: sub end_menu {
1773: my ($target,$token) = @_;
1774: my $currentstring = '';
1775: if ($target eq 'web' || $target eq 'webgrade') {
1776: $currentstring = $token->[2];
1777: } elsif ($target eq 'tex') {
1778: $currentstring = " \\end{itemize}";
1779: }
1780: return $currentstring;
1781: }
1782:
1783: #-- <dir> tag (end tag required)
1784: sub start_dir {
1785: my ($target,$token) = @_;
1786: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1787: if ($target eq 'web' || $target eq 'webgrade') {
1788: $currentstring .= $token->[4];
1789: } elsif ($target eq 'tex') {
1790: $currentstring .= " \\begin{itemize} ";
1791: }
1792: return $currentstring;
1793: }
1794:
1795: sub end_dir {
1796: my ($target,$token) = @_;
1797: my $currentstring = '';
1798: if ($target eq 'web' || $target eq 'webgrade') {
1799: $currentstring = $token->[2];
1800: } elsif ($target eq 'tex') {
1801: $currentstring = " \\end{itemize}";
1802: }
1803: return $currentstring;
1804: }
1805:
1806: #-- <ol> tag (end tag required)
1807: sub start_ol {
1808: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1809: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1810: if ($target eq 'web' || $target eq 'webgrade') {
1811: $currentstring .= $token->[4];
1812: } elsif ($target eq 'tex') {
1813: $Apache::londefdef::list_index=0;
1814: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1815: if ($type eq '1') {
1816: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1817: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1818: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1819: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1820: } elsif ($type eq 'A') {
1821: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1822: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1823: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1824: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1825: } elsif ($type eq 'a') {
1826: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1827: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1828: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1829: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1830: } elsif ($type eq 'i') {
1831: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1832: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1833: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1834: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1835: } elsif ($type eq 'I') {
1836: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1837: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1838: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1839: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1840: }
1841: $currentstring .= '\strut \begin{enumerate}';
1842: }
1843: return $currentstring;
1844: }
1845:
1846: sub end_ol {
1847: my ($target,$token) = @_;
1848: my $currentstring = '';
1849: if ($target eq 'web' || $target eq 'webgrade') {
1850: $currentstring = $token->[2];
1851: } elsif ($target eq 'tex') {
1852: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1853: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1854: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1855: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1856: }
1857: return $currentstring;
1858: }
1859:
1860: #-- <dl> tag (end tag required)
1861: sub start_dl {
1862: my ($target,$token) = @_;
1863: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1864: if ($target eq 'web' || $target eq 'webgrade') {
1865: $currentstring .= $token->[4];
1866: } elsif ($target eq 'tex') {
1867: $currentstring .= '\begin{description}';
1868: $Apache::londefdef::DL++;
1869: push(@Apache::londefdef::description,[]);
1870: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1871: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1872: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1873: }
1874: return $currentstring;
1875: }
1876:
1877: sub end_dl {
1878: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1879: my $currentstring = '';
1880: if ($target eq 'web' || $target eq 'webgrade') {
1881: $currentstring = $token->[2];
1882: } elsif ($target eq 'tex') {
1883: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1884: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1885: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1886: $currentstring.=' '.$element.' ';
1887: }
1888: pop(@Apache::londefdef::description);
1889: $currentstring.='\end{description}';
1890: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1891: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1892: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1893: $Apache::londefdef::DL--;
1894: }
1895: return $currentstring;
1896: }
1897:
1898: #-- <dt> tag (end tag optional)
1899: sub start_dt {
1900: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1901: my $currentstring='';
1902: if ($target eq 'web' || $target eq 'webgrade') {
1903: $currentstring = $token->[4];
1904: } elsif ($target eq 'tex') {
1905: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1906: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1907: &Apache::lonxml::startredirection();
1908: $Apache::londefdef::DT[-1]++;
1909: $Apache::londefdef::seenDT[-1]=1;
1910: }
1911: return $currentstring;
1912: }
1913:
1914: sub end_dt {
1915: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1916: my $currentstring = '';
1917: if ($target eq 'web' || $target eq 'webgrade') {
1918: $currentstring = $token->[2];
1919: } elsif ($target eq 'tex') {
1920: if ($Apache::londefdef::DT[-1]) {
1921: my $data=&item_cleanup();
1922: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1923: $Apache::londefdef::DT[-1]--;
1924: }
1925: }
1926: return $currentstring;
1927: }
1928:
1929: sub item_cleanup {
1930: my $item=&Apache::lonxml::endredirection();
1931: $item=~s/\\begin{center}//g;
1932: $item=~s/\\end{center}//g;
1933: return $item;
1934: }
1935:
1936: #-- <dd> tag (end tag optional)
1937: sub start_dd {
1938: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1939: my $currentstring = '';
1940: if ($target eq 'web' || $target eq 'webgrade') {
1941: $currentstring = $token->[4];
1942: } elsif ($target eq 'tex') {
1943: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1944: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1945: if (!$Apache::londefdef::seenDT[-1]) {
1946: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1947: }
1948: push(@{$Apache::londefdef::description[-1]},'');
1949: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1950: $Apache::londefdef::DD[-1]++;
1951: &Apache::lonxml::startredirection();
1952: }
1953: return $currentstring;
1954: }
1955:
1956: sub end_dd {
1957: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1958: my $currentstring = '';
1959: if ($target eq 'web' || $target eq 'webgrade') {
1960: $currentstring = $token->[2];
1961: } elsif ($target eq 'tex') {
1962: $Apache::londefdef::description[-1]->[-1].=
1963: &Apache::lonxml::endredirection().' \vskip 0mm ';
1964: $Apache::londefdef::DD[-1]--;
1965: }
1966: return $currentstring;
1967: }
1968:
1969: #-- <table> tag (end tag required)
1970: # <table> also ends any prior <p> that is not closed.
1971: # but, unless I allow <p>'s to nest, that's the
1972: # only way I could think of to allow <p> in
1973: # <tr> <th> bodies
1974: #
1975: #list of supported attributes: border,width,TeXwidth
1976: sub start_table {
1977: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1978: my $textwidth = '';
1979: my $currentstring = &end_p();
1980: if ($target eq 'web' || $target eq 'webgrade') {
1981: $currentstring .= $token->[4];
1982: } elsif ($target eq 'tex') {
1983: push(@Apache::londefdef::table, {});
1984: $Apache::londefdef::table[-1]{'row_number'} = -1;
1985: #maximum table's width (default coincides with text line length)
1986: if ($#Apache::londefdef::table==0) {
1987: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1988: $textwidth=~/(\d+\.?\d*)/;
1989: $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
1990: } else {
1991: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1992: #the maximum width of nested table is determined by LATeX width of parent cell
1993: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1994: } else {
1995: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1996: $textwidth=$Apache::londefdef::table[-2]{'width'};
1997: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1998: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1999: }
2000: }
2001: }
2002:
2003: # width either comes forced from the TeXwidth or the width parameters.
2004: # in either case it can be a percentage or absolute width.
2005: # in the width case we ignore absolute width
2006: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2007: if (!defined($TeXwidth)) {
2008: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
2009: $safeeval,undef,1);
2010: if ($htmlwidth =~ /%/) {
2011: $TeXwidth = $htmlwidth;
2012: } else {
2013: $TeXwidth = $textwidth;
2014: }
2015: }
2016: # if the width is specified as a % it is converted to an absolute width.
2017: # otherwise.. just plugged right in the hash
2018:
2019: if ($TeXwidth=~/%/) {
2020: $TeXwidth=~/(\d+)/;
2021: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
2022: } else {
2023: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
2024: }
2025: # In the end, however the table width cannot be wider than $textwidth...
2026:
2027: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
2028: $Apache::londefdef::table[-1]{'width'} = $textwidth;
2029: }
2030: #table's border
2031: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2032: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2033: unless (defined $border) { $border = 0; }
2034: if ($border) {
2035: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
2036: $Apache::londefdef::table[-1]{'vinc'} = '&';
2037: $Apache::londefdef::table[-1]{'vvinc'} = '|';
2038: } else {
2039: $Apache::londefdef::table[-1]{'hinc'} = '';
2040: $Apache::londefdef::table[-1]{'vinc'} = '&';
2041: $Apache::londefdef::table[-1]{'vvinc'} = '';
2042: }
2043: if ($#Apache::londefdef::table==0) {
2044: # Note that \newline seems to destroy the alignment envs.
2045: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2046: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2047: }
2048: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2049: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2050: $Apache::londefdef::table[-1]{'objectlen'}=[];
2051: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2052: $Apache::londefdef::table[-1]{'maxlen'}=[];
2053: $Apache::londefdef::table[-1]{'minlen'}=[];
2054: $Apache::londefdef::table[-1]{'content'}=[];
2055: $Apache::londefdef::table[-1]{'align'}=[];
2056: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2057:
2058:
2059: }
2060: return $currentstring;
2061: }
2062:
2063: sub end_table {
2064: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2065: my $currentstring = '';
2066: if ($target eq 'web' || $target eq 'webgrade') {
2067: $currentstring = $token->[2];
2068: } elsif ($target eq 'tex') {
2069: my $inmemory = '';
2070: my $output = '';
2071: my $WARNING='';
2072: #width of columns from TeXwidth attributes
2073:
2074: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2075: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2076: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2077: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2078: }
2079: }
2080: }
2081: #free space and number of empty columns
2082: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2083: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2084: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2085: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2086: $empty_columns++;
2087: } else {
2088: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2089: }
2090: }
2091:
2092: #boundaries for contents columns
2093: my @min_len=();#columns can not be narrower
2094: my @max_len=();#maximum length of column
2095: my $avg_max;
2096: my $avg_min;
2097: my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
2098: for (my $jn=0;$jn<=$counter_cols; $jn++) {
2099: my ($localmin,$localmax)=(0,0);
2100: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2101: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2102: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2103: }
2104: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2105: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2106: }
2107: }
2108: push @min_len, $localmin;
2109: push @max_len, $localmax;
2110: $avg_max = $localmax + $avg_max;
2111: $avg_min = $localmin + $avg_min;
2112: }
2113: # Does not really matter what the average max/min are if there are no cols.
2114: # and this prevents div 0 in that case.
2115:
2116: if ($counter_cols != 0) {
2117: $avg_max = $avg_max/$counter_cols;
2118: $avg_min = $avg_min/$counter_cols;
2119: }
2120:
2121:
2122: # I don't think the below is needed.. but just in case:
2123:
2124: if ($avg_min > $avg_max) {
2125: my $temp = $avg_min;
2126: $avg_min = $avg_max;
2127: $avg_max = $temp;
2128: }
2129:
2130:
2131: for (my $jn=0;$jn<=$counter_cols;$jn++) {
2132: my $localmin=0,;
2133: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2134: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2135: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2136: }
2137: }
2138: if ($max_len[$jn]<$localmin) {
2139: $max_len[$jn]=$localmin;
2140: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2141: }#object size is bigger
2142: if ($min_len[$jn]<$localmin) {
2143: $min_len[$jn]=$localmin;
2144: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2145: }#object size is bigger
2146: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2147: $min_len[$jn]=0;
2148: $max_len[$jn]=0;
2149: }
2150: # Spans seem to be really bothered by max/min = 0. So if we have one
2151: # make it an average joe max/min.
2152:
2153: if ($max_len[$jn] == 0) {
2154: $max_len[$jn] = $avg_max;
2155: }
2156: if ($min_len[$jn] == 0) {
2157: $min_len[$jn] = $avg_min;
2158: }
2159:
2160: }
2161: #final adjustment of column width
2162: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2163: my @adjust=();
2164: #step 1. adjustment by maximum value
2165: my $space_needed=0;
2166: for (my $jn=0;$jn<=$#max_len;$jn++) {
2167: $space_needed=$space_needed+$max_len[$jn];
2168: }
2169: if ($space_needed<=$available_space) {
2170:
2171: for (my $jn=0;$jn<=$#max_len;$jn++) {
2172: if ($fwidth[$jn]==0) {
2173: $fwidth[$jn]=$max_len[$jn];
2174: }
2175: }
2176: } else {
2177: #step 2. adjustment by minimum value (estimation)
2178: $space_needed=0;
2179: for (my $jn=0;$jn<=$#min_len;$jn++) {
2180: $space_needed+=$min_len[$jn];
2181: }
2182: if ($space_needed>$available_space) {
2183: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2184: for (my $jn=0;$jn<=$#max_len;$jn++) {
2185: if ($fwidth[$jn]==0) {
2186: $fwidth[$jn]=$min_len[$jn];
2187: }
2188: }
2189: #check if we have objects which can be scaled
2190: my $how_many_to_scale=0;
2191: my @to_scale=();
2192: for (my $jn=0;$jn<=$#max_len;$jn++) {
2193: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2194: $how_many_to_scale++;
2195: push @to_scale, $jn;
2196: }
2197: }
2198: if ($how_many_to_scale>0) {
2199: my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
2200: foreach my $jn (@to_scale) {
2201: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2202: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2203: if ($1 ne '') {
2204: my $current_length=&recalc($1);
2205: $current_length=~/(\d+\.?\d*)/;
2206: $current_length=$current_length-$space_to_adjust;
2207: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2208: }
2209: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2210: if ($1 ne '') {
2211: my $current_length=$1;
2212: $current_length=$current_length-$space_to_adjust;
2213: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2214: }
2215: }
2216: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2217: }
2218: }
2219: } else {
2220: #step 3. adjustment over minimal + corrections
2221: my $enlarge_coef=$available_space/$space_needed;
2222: my $acsessive=0;
2223: for (my $jn=0;$jn<=$#min_len;$jn++) {
2224: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2225: if ($adjust[$jn]>$max_len[$jn]) {
2226: $fwidth[$jn]=$max_len[$jn];
2227: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2228: $adjust[$jn]=0;
2229:
2230: }
2231: }
2232: if ($acsessive>0) {
2233: #we have an excess of space and can redistribute it
2234: my $notempty_columns=0;
2235: for (my $jn=0;$jn<=$#min_len;$jn++) {
2236: if ($adjust[$jn]!=0) {
2237: $notempty_columns++;
2238: }
2239: }
2240: my $per_column=$acsessive/$notempty_columns;
2241: for (my $jn=0;$jn<=$#min_len;$jn++) {
2242: if ($adjust[$jn]!=0) {
2243: $adjust[$jn]+=$per_column;
2244: $fwidth[$jn]=$adjust[$jn];
2245: }
2246: }
2247: } else {
2248: for (my $jn=0;$jn<=$#min_len;$jn++) {
2249: $fwidth[$jn]=$adjust[$jn];
2250: }
2251: }
2252: }
2253: }
2254: # use all available width or specified width as if not specified,
2255: # the specified width gets defaulted to the available width.
2256:
2257: my $current=0;
2258: for (my $i=0;$i<=$#fwidth;$i++) {
2259: $current+=$fwidth[$i];
2260: }
2261: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2262: for (my $i=0;$i<=$#fwidth;$i++) {
2263: $fwidth[$i]*=$coef;
2264: }
2265: #removing of empty columns if allowed
2266: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2267: if ($permission eq 'yes') {
2268: my @cleaned_table=();
2269: my @cleaned_header=();
2270: my $colind=0;
2271: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2272: if ($fwidth[$jn]!=0) {
2273: #we need to copy column
2274: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2275: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2276: $cleaned_header[$colind]=$fwidth[$jn];
2277: }
2278: $colind++;
2279: }
2280: }
2281: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2282: @fwidth=@cleaned_header;
2283: }
2284:
2285:
2286: #construct header of the table
2287: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2288: for (my $in=0;$in<=$#fwidth;$in++) {
2289: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2290: }
2291: $header_of_table .= '}';
2292:
2293: #fill the table
2294: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2295: my $have_rowspan = 0;
2296: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2297:
2298: #-----------------------------------------------------------
2299: # I think this order of doing things will ensure that
2300: # single rowspan, columspan and combined row/colspans will
2301: # work correctly. LaTeX is delicate here.
2302: # RF.
2303:
2304: # Start a rowspan if necessary:
2305:
2306: my $primary_col_width = $fwidth[$jn]; # Width of primary column.
2307: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2308: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2309: #
2310: # Do the appropriate magic if this has a colspan
2311: #
2312:
2313: my $spanwidth = 0;
2314: if ($colspan > 1) {
2315: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2316: $spanwidth += $fwidth[$spancol];
2317: }
2318: $output .= '\multicolumn{'.
2319: $colspan
2320: ."}";
2321: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2322: $output .= '{|c|}{';
2323: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2324: $output .= '{|r|}{';
2325: }
2326: else {
2327: $output .= "{|p{$spanwidth mm}|}{";
2328: }
2329:
2330: } else {
2331: $spanwidth = $primary_col_width; # If no span width will be just colwidth
2332: }
2333:
2334: # Rowspan... if colspan is 1, and there's an alignment we'll need
2335: # to kick in a multicolumn in order to get the alignment spec.
2336: # this must precede the multirow or LaTex gets quite upset.
2337: # Naturally if colspan > 1 we've already done that above ^
2338: #
2339: my $multirow_aligned = 0;
2340: if ($rowspan > 1) {
2341: if ($colspan == 1) {
2342: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2343: $output .= '\multicolumn{1}{|c|}{';
2344: $multirow_aligned = 1;
2345: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2346: $output .= '\multicolumn{1}{|r|}{';
2347: $multirow_aligned = 1;
2348: }
2349: }
2350: $have_rowspan++;
2351: if ($multirow_aligned) {
2352: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2353: } else {
2354: $output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
2355: }
2356:
2357: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2358: s{^\s*\\par\s*}{};
2359: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2360: s{\s*\\vskip\s*0pt\s*$}{};
2361:
2362: #
2363: # If we did not throw in a multicolumn to align, then add
2364: # an extra {
2365: # so we close correctly without having to keep additional state
2366: # around
2367: #
2368: if (!$multirow_aligned) {
2369: $output .= '{';
2370: }
2371: }
2372: if (($rowspan eq '^') || ($rowspan eq '_')) {
2373: $have_rowspan++;
2374: }
2375: #--------------------------------------------------------------
2376:
2377:
2378: # For right and center alignment of single cells.
2379: # we are going to use a multicolumn with a span of 1 to specify alignment.
2380: #
2381: if ($colspan == 1 && $rowspan == 1) {
2382: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2383: $output .= '\multicolumn{1}{|c|}{';
2384: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2385: $output .= '\multicolumn{1}{|r|}{';
2386: }
2387: }
2388:
2389: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2390:
2391: if (($colspan == 1 && $rowspan == 1) &&
2392: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2393: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2394: $output .= '}';
2395: }
2396:
2397: # Close off any open multirow:
2398:
2399: if ($rowspan > 1) {
2400: $output .= '}}';
2401: }
2402: # Close off the colspan...
2403: #
2404: if ($colspan > 1) {
2405: $output .= '}';
2406: $jn += $colspan-1; # Adjust for number of rows really left.
2407: }
2408: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2409: }
2410: # If have_rowspan > 0, and borders are on, then
2411: # we need to do more than put an \hline at the bottom of row.
2412: # we need to do the appropriate \cline to ensure that
2413: # the spanned rows don't have \hlines through them.
2414:
2415: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2416: $output .= ' \\\\ ';
2417: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2418: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2419: if ($rowspan ne "^") {
2420: if (($rowspan <= 1) || ($rowspan eq '_')) {
2421: my $column = $jn+1;
2422: $output .= '\cline{'.$column.'-'.$column.'} ';
2423: }
2424: }
2425: }
2426:
2427: } else {
2428: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2429: }
2430: }
2431: # Note that \newline destroys alignment env's produced by e.g. <div>
2432: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2433: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2434: if ($#Apache::londefdef::table > 0) {
2435: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2436: # Figure out max/and min width by summing us and then
2437: # apply that to the current column of the table we nest in
2438: # if it's larger than the current width or the current width
2439: # is undefined.
2440: #
2441: my $min_nested_width = 0;
2442: my $max_nested_width = 0;
2443: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2444: $min_nested_width += $min_len[$col];
2445: $max_nested_width += $max_len[$col];
2446:
2447: }
2448: # Fudge in an extra 5 mm for borders etc:
2449:
2450: $min_nested_width += 5;
2451: $max_nested_width += 5;
2452:
2453: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2454: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2455: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2456: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2457: }
2458: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2459: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2460: }
2461:
2462: pop @Apache::londefdef::table;
2463: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2464: } else {
2465: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2466: pop @Apache::londefdef::table;
2467: undef @Apache::londefdef::table;
2468: }
2469: }
2470: return $currentstring;
2471: }
2472:
2473: #-- <tr> tag (end tag optional)
2474: sub start_tr {
2475: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2476: my $currentstring = '';
2477: if ($target eq 'web' || $target eq 'webgrade') {
2478: $currentstring = $token->[4];
2479: } elsif ($target eq 'tex') {
2480: $Apache::londefdef::table[-1]{'row_number'}++;
2481: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2482: if ($alignchar ne '') {
2483: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2484: } else {
2485: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2486: }
2487: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2488: #
2489: # Need to save the number of table columns to preserve the max # columns.
2490: #
2491: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2492: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2493: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2494: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2495: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2496: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2497: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2498: }
2499: return $currentstring;
2500: }
2501:
2502: sub end_tr {
2503: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2504: my $currentstring = &end_p(); # Close any pending <p> in the row.
2505: if ($target eq 'web' || $target eq 'webgrade') {
2506: $currentstring .= $token->[2];
2507: } elsif ($target eq 'tex') {
2508: if ($Apache::londefdef::TD_redirection) {
2509: &end_td_tex($parstack,$parser,$safeeval);
2510: }
2511: # Counter columns must be the maximum number of columns seen
2512: # in the table so far so:
2513: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2514: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2515: }
2516:
2517:
2518:
2519: }
2520: return $currentstring;
2521: }
2522:
2523: #-- <td> tag (end tag optional)
2524: sub start_td {
2525: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2526: my $currentstring = '';
2527: if ($target eq 'web' || $target eq 'webgrade') {
2528: $currentstring = $token->[4];
2529: } elsif ($target eq 'tex') {
2530: $Apache::londefdef::TD_redirection = 1;
2531: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2532: }
2533: return $currentstring;
2534: }
2535:
2536: sub tag_check {
2537: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2538: my @ar=@$parstack;
2539: for (my $i=$#ar-1;$i>=0;$i--) {
2540: if (lc($$tagstack[$i]) eq $good_tag) {
2541: &start_td_tex($parstack,$parser,$safeeval);
2542: last;
2543: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2544: splice @ar, $i+1;
2545: &end_td_tex(\@ar,$parser,$safeeval);
2546: &start_td_tex($parstack,$parser,$safeeval);
2547: last;
2548: }
2549: }
2550: return '';
2551: }
2552:
2553: sub start_td_tex {
2554: my ($parstack,$parser,$safeeval) = @_;
2555: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2556: if ($alignchar eq '') {
2557: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2558: }
2559: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2560: $Apache::londefdef::table[-1]{'counter_columns'}++;
2561: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2562: if (defined $TeXwidth) {
2563: my $current_length=&recalc($TeXwidth);
2564: $current_length=~/(\d+\.?\d*)/;
2565: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2566: }
2567: &Apache::lonxml::startredirection();
2568: return '';
2569: }
2570:
2571: sub end_td_tex {
2572: my ($parstack,$parser,$safeeval) = @_;
2573: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2574: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2575: my $data = &Apache::lonxml::endredirection();
2576:
2577: # The rowspan array of the table indicates which cells are part of a span.
2578: # n indicates the start of a span set of n rows.
2579: # ^ indicates a cell that continues a span set.
2580: # _ indicates the cell is at the bottom of a span set.
2581: # If this and subsequent cells are part of a rowspan, we must
2582: # push along the row until we find one that is not.
2583:
2584: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2585: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2586: # Part of a span.
2587: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2588: $current_column++;
2589: }
2590: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2591:
2592:
2593: # Get the column and row spans.
2594: # Colspan can be done via \multicolumn if I can figure out the data structs.
2595:
2596: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2597: if (!$colspan) {
2598: $colspan = 1;
2599: }
2600:
2601: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2602: if (!$rowspan) {
2603: $rowspan = 1;
2604: }
2605:
2606:
2607:
2608: for (my $c = 0; $c < $colspan; $c++) {
2609: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2610: for (my $i = 1; $i < $rowspan; $i++) {
2611: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2612: if ($i == ($rowspan-1)) {
2613: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2614: }
2615: }
2616: }
2617:
2618: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2619: if (defined $TeXwidth) {
2620: for (my $c = 0; $c < $colspan; $c++) {
2621: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2622: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2623: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2624: }
2625: } else {
2626: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2627: my $garbage_data=$data;
2628: my $fwidth=0;
2629: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2630: my $current_length=&recalc($1);
2631: $current_length=~/(\d+\.?\d*)/;
2632: if ($fwidth<$1) {$fwidth=$1;}
2633: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2634: }
2635: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2636: my $current_length=$1;
2637: if ($fwidth<$current_length) {$fwidth=$current_length;}
2638: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2639: }
2640: for (my $c = 0; $c < $colspan; $c++) {
2641: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2642: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2643: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2644: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2645: }
2646: } 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)*/) {
2647: my $garbage_data=$data;
2648: my $fwidth=0;
2649: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2650: my $current_length=&recalc($1);
2651: $current_length=~/(\d+\.?\d*)/;
2652: if ($fwidth<$1) {$fwidth=$1;}
2653: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2654: }
2655: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2656: my $current_length=&recalc($1);
2657: $current_length=~/(\d+\.?\d*)/;
2658: if ($fwidth<$1) {$fwidth=$1;}
2659: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2660: }
2661: for (my $c = 0; $c < $colspan; $c++) {
2662: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2663: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2664: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2665: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2666: }
2667: $data=~s/\\\\\s*$//;
2668: } else {
2669: $data=~s/^\s+(\S.*)/$1/;
2670: $data=~s/(.*\S)\s+$/$1/;
2671: $data=~s/(\s)+/$1/;
2672: my ($current_length,$min_length)=(0,0);
2673: if ($data=~/\\vskip/) {
2674: my $newdata=$data;
2675: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2676: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2677: foreach my $elementdata (@newdata) {
2678: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2679: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2680: my @words=split(/ /,$elementdata);
2681: foreach my $word (@words) {
2682: my $lengthword=2.5*&LATEX_length($word);
2683: if ($min_length<$lengthword) {$min_length=$lengthword;}
2684: }
2685: }
2686: } else {
2687: $current_length=2.5*&LATEX_length($data);
2688: my @words=split(/ /,$data);
2689: foreach my $word (@words) {
2690: my $lengthword=2*&LATEX_length($word);
2691: if ($min_length<$lengthword) {$min_length=$lengthword;}
2692: }
2693: }
2694: for (my $c = 0; $c < $colspan; $c++) {
2695: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2696: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2697: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2698: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2699: }
2700: }
2701: }
2702: # Substitute all of the tables nested in this cell in their appropriate places.
2703:
2704:
2705: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2706: for (my $in=0; $in<=$nested_count; $in++) {
2707: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2708: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2709: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2710: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2711:
2712: }
2713: # Should be be killing off the 'include' elements as they're used up?
2714:
2715: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2716:
2717:
2718:
2719:
2720: # the colspan array will indicate how many columns will be spanned by this
2721: # cell..this requires that counter_columns also be adjusted accordingly
2722: # so that the next bunch of text goes in the right cell. Note that since
2723: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2724: #
2725:
2726: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2727: for (my $i = 0; $i < ($colspan -1); $i++) {
2728: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2729: }
2730: for (my $r = 0; $r < $rowspan; $r++) {
2731: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2732: # Put empty text in spanned cols.
2733:
2734: }
2735:
2736:
2737:
2738: return '';
2739: }
2740:
2741: sub end_td {
2742: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2743: my $currentstring = '';
2744: if ($target eq 'web' || $target eq 'webgrade') {
2745: $currentstring = $token->[2];
2746: } elsif ($target eq 'tex') {
2747: $Apache::londefdef::TD_redirection =0;
2748: &end_td_tex($parstack,$parser,$safeeval);
2749: }
2750: return $currentstring;
2751: }
2752:
2753: #-- <th> tag (end tag optional)
2754: sub start_th {
2755: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2756: my $currentstring = '';
2757: if ($target eq 'web' || $target eq 'webgrade') {
2758: $currentstring = $token->[4];
2759: } elsif ($target eq 'tex') {
2760: $Apache::londefdef::TD_redirection = 1;
2761: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2762: }
2763: return $currentstring;
2764: }
2765:
2766: sub tagg_check {
2767: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2768: my @ar=@$parstack;
2769: for (my $i=$#ar-1;$i>=0;$i--) {
2770: if (lc($$tagstack[$i]) eq $good_tag) {
2771: &start_th_tex($parstack,$parser,$safeeval);
2772: last;
2773: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2774: splice @ar, $i+1;
2775: &end_th_tex(\@ar,$parser,$safeeval);
2776: &start_th_tex($parstack,$parser,$safeeval);
2777: last;
2778: }
2779: }
2780: return '';
2781: }
2782:
2783: sub start_th_tex {
2784: my ($parstack,$parser,$safeeval) = @_;
2785: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2786: if ($alignchar eq '') {
2787: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2788: }
2789: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2790: $Apache::londefdef::table[-1]{'counter_columns'}++;
2791: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2792: if (defined $TeXwidth) {
2793: my $current_length=&recalc($TeXwidth);
2794: $current_length=~/(\d+\.?\d*)/;
2795: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2796: }
2797: &Apache::lonxml::startredirection();
2798: return '';
2799: }
2800:
2801: sub end_th_tex {
2802: my ($parstack,$parser,$safeeval) = @_;
2803: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2804: my $data=&Apache::lonxml::endredirection();
2805: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2806: if (defined $TeXwidth) {
2807: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2808: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2809: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2810: } else {
2811: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2812: my $garbage_data=$data;
2813: my $fwidth=0;
2814: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2815: my $current_length=&recalc($1);
2816: $current_length=~/(\d+\.?\d*)/;
2817: if ($fwidth<$1) {$fwidth=$1;}
2818: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2819: }
2820: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2821: my $current_length=$1;
2822: if ($fwidth<$current_length) {$fwidth=$current_length;}
2823: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2824: }
2825: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2826: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2827: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2828: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2829: } else {
2830: $data=~s/^\s+(\S.*)/$1/;
2831: $data=~s/(.*\S)\s+$/$1/;
2832: $data=~s/(\s)+/$1/;
2833: my ($current_length,$min_length)=(0,0);
2834: if ($data=~/\\vskip/) {
2835: my $newdata=$data;
2836: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2837: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2838: foreach my $elementdata (@newdata) {
2839: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2840: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2841: my @words=split(/ /,$elementdata);
2842: foreach my $word (@words) {
2843: my $lengthword=2.5*&LATEX_length($word);
2844: if ($min_length<$lengthword) {$min_length=$lengthword;}
2845: }
2846: }
2847: } else {
2848: $current_length=2.5*&LATEX_length($data);
2849: my @words=split(/ /,$data);
2850: foreach my $word (@words) {
2851: my $lengthword=2*&LATEX_length($word);
2852: if ($min_length<$lengthword) {$min_length=$lengthword;}
2853: }
2854: }
2855: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2856: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2857: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2858: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2859: }
2860: }
2861: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2862: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2863: }
2864: #make data bold
2865: $data='\textbf{'.$data.'}';
2866: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2867: return'';
2868: }
2869:
2870: sub end_th {
2871: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2872: my $currentstring = &end_p(); # Close any open <p> in the row.
2873: if ($target eq 'web' || $target eq 'webgrade') {
2874: $currentstring .= $token->[2];
2875: } elsif ($target eq 'tex') {
2876: $Apache::londefdef::TD_redirection =0;
2877: &end_th_tex($parstack,$parser,$safeeval);
2878: }
2879: return $currentstring;
2880: }
2881:
2882: #-- <img> tag (end tag forbidden)
2883: #
2884: # Render the <IMG> tag.
2885: # <IMG> has the following attributes (in addition to the
2886: # standard HTML ones:
2887: # TeXwrap - Governs how the tex target will try to wrap text around
2888: # horizontally aligned images.
2889: # TeXwidth - The width of the image when rendered for print (mm).
2890: # TeXheight - The height of the image when rendered for print (mm)
2891: # (Note there seems to also be support for this as a % of page size)
2892: #
2893: sub start_img {
2894: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2895: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2896: undef,1);
2897: if (! $src &&
2898: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2899: ) {
2900: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2901: return '';
2902: }
2903: &Apache::lonxml::extlink($src);
2904: my $currentstring = '';
2905: my $scaling = .3;
2906:
2907: # Render unto browsers that which are the browser's...
2908:
2909: if ($target eq 'web' || $target eq 'webgrade') {
2910: if ($env{'browser.imagesuppress'} ne 'on') {
2911: my $enc = ('yes' eq
2912: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2913: $safeeval)));
2914: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2915: $enc);
2916: } else {
2917: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2918: undef,1);
2919: if (!$alttag) {
2920: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2921: $src);
2922: }
2923: $currentstring.='[IMAGE: '.$alttag.']';
2924: }
2925:
2926: # and render unto TeX that which is LaTeX
2927:
2928: } elsif ($target eq 'tex') {
2929: #
2930: # The alignment will require some superstructure to be put around
2931: # the \includegraphics stuff. At present we can only partially
2932: # simulate the alignments offered by html.
2933: #
2934: #
2935: my $align = lc(&Apache::lonxml::get_param('align',
2936: $parstack,
2937: $safeeval,
2938: undef,1));
2939: if(!$align) {
2940: $align = "bottom"; # This is html's default so it's ours too.
2941: }
2942: #
2943: &Apache::lonxml::debug("Alignemnt = $align");
2944: # LaTeX's image/text wrapping is really bad since it wants to
2945: # make figures float.
2946: # The user has the optional parameter (applicable only to l/r
2947: # alignment to use the picins/parpic directive to get wrapped text
2948: # this is also imperfect.. that's why we give them a choice...
2949: # so they can't yell at us for our choice.
2950: #
2951: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2952: $parstack,
2953: $safeeval,
2954: undef,0);
2955: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2956: if(!$latex_rendering) {
2957: $latex_rendering = "texwrap";
2958: }
2959: # using texwrap inside a table does not work. So, if after all of this,
2960: # texwrap is on, we turn it off if we detect we're in a table:
2961: #
2962: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2963: $latex_rendering = 'parpic';
2964: }
2965:
2966: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2967:
2968: #if original gif/jpg/png file exist do following:
2969: my $origsrc=$src;
2970: my ($path,$file) = &get_eps_image($src);
2971: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2972: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2973: &Apache::lonxml::debug("path = $path file = $file src = $src");
2974: if (-e $src) {
2975: &Apache::lonxml::debug("$src exists");
2976: my ($height_param,$width_param)=
2977: &image_size($origsrc,0.3,$parstack,$safeeval);
2978: my $size;
2979: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2980: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2981: # Default size if not able to extract that (e.g. eps image).
2982:
2983: # &Apache::lonnet::logthis("Size = $size");
2984:
2985: $size='['.$size;
2986: $size=~s/,$/]/;
2987: $currentstring .= '\graphicspath{{'.$path.'}}'
2988: .'\includegraphics'.$size.'{'.$file.'} ';
2989: my $closure;
2990: ($currentstring, $closure) = &align_latex_image($align,
2991: $latex_rendering,
2992: $currentstring,
2993: $width_param,
2994: $height_param);
2995: $currentstring .= $closure;
2996:
2997: } else {
2998: &Apache::lonxml::debug("$src does not exist");
2999: #original image file doesn't exist so check the alt attribute
3000: my $alt =
3001: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
3002: unless ($alt) {
3003: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3004: }
3005:
3006: if ($alt) { $currentstring .= ' '.$alt.' '; }
3007: }
3008:
3009: # And here's where the semi-quote breaks down: allow the user
3010: # to edit the beast as well by rendering the problem for edit:
3011: } elsif ($target eq 'edit') {
3012: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
3013: $currentstring .=&Apache::edit::tag_start($target,$token);
3014: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
3015: &Apache::edit::browse('src',undef,'alt',$only).' '.
3016: &Apache::edit::search('src',undef,'alt').'<br />';
3017: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
3018: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
3019: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
3020: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
3021: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
3022: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
3023: ['','bottom','middle','top','left','right'],$token,5);
3024: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
3025: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
3026: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
3027: ['no','yes'], $token, 2);
3028: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
3029: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
3030: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
3031: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
3032: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
3033:
3034:
3035: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
3036: if ($width) { $currentstring.=' width="'.$width.'" '; }
3037: if ($height) { $currentstring.=' height="'.$height.'" '; }
3038: $currentstring .= ' />';
3039: } elsif ($target eq 'modified') {
3040: my ($osrc,$owidth,$oheight)=
3041: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3042: my $ctag=&Apache::edit::get_new_args($token,$parstack,
3043: $safeeval,'src','alt','align',
3044: 'TeXwidth','TeXheight', 'TeXwrap',
3045: 'width','height','encrypturl');
3046: my ($nsrc,$nwidth,$nheight)=
3047: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3048: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
3049: &image_replication($loc);
3050: my ($iwidth,$iheight);
3051: if (-e $loc) {
3052: my $image = Image::Magick->new;
3053: $image->Read($loc);
3054: ($iwidth, $iheight) = ($image->Get('width'),
3055: $image->Get('height'));
3056: }
3057: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
3058: # changed image or no size specified,
3059: # if they didn't explicitly change the
3060: # width or height use the ones from the image
3061: if ($iwidth && $iheight) {
3062: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
3063: $token->[2]{'width'} = $iwidth;$ctag=1;
3064: }
3065: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
3066: $token->[2]{'height'}=$iheight;$ctag=1;
3067: }
3068: }
3069: }
3070: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
3071: # if we don't have a width or height
3072: if ($iwidth && $cwidth && !$cheight) {
3073: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
3074: }
3075: if ($iheight && $cheight && !$cwidth) {
3076: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
3077: }
3078: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3079: }
3080:
3081: return $currentstring;
3082: }
3083:
3084: sub end_img {
3085: my ($target,$token) = @_;
3086: my $currentstring = '';
3087: if ($target eq 'web' || $target eq 'webgrade') {
3088: $currentstring = $token->[2];
3089: } elsif ($target eq 'tex') {
3090: $currentstring = '';
3091: }
3092: return $currentstring;
3093: }
3094:
3095: #-- <applet> tag (end tag required)
3096: sub start_applet {
3097: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3098:
3099: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3100: &Apache::lonxml::extlink($code);
3101: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3102: undef,1);
3103: &Apache::lonxml::extlink($archive);
3104: my $currentstring = '';
3105: if ($target eq 'web' || $target eq 'webgrade') {
3106: if ($env{'browser.appletsuppress'} ne 'on') {
3107: $currentstring = &Apache::lonenc::encrypt_ref($token,
3108: {'code'=>$code,
3109: 'archive'=>$archive}
3110: );
3111: } else {
3112: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3113: $safeeval,undef,1);
3114: unless ($alttag) {
3115: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3116: $code);
3117: }
3118: $currentstring='[APPLET: '.$alttag.']';
3119: }
3120: } elsif ($target eq 'tex') {
3121: # Turn off some stuff we can't be inside thank you LaTeX
3122:
3123:
3124: my $restart_sub = 0;
3125: my $restart_sup = 0;
3126:
3127: # Since <sub> and <sup> are simple tags it's ok to turn off/on
3128: # using the start_ stop_ functions.. those tags only care about
3129: # $target.
3130:
3131: if (&is_inside_of($tagstack, "sub")) {
3132: $restart_sub = 1;
3133: $currentstring .= &end_sub($target, $token, $tagstack,
3134: $parstack, $parser, $safeeval);
3135: }
3136: if (&is_inside_of($tagstack, "sup")) {
3137: $restart_sup = 1;
3138: $currentstring .= &end_sup($target, $token, $tagstack,
3139: $parstack, $parser, $safeeval);
3140: }
3141:
3142: # Now process the applet; just replace it with its alt attribute.
3143:
3144: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3145: $safeeval,undef,1);
3146: unless ($alttag) {
3147: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3148: undef,1);
3149: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3150: $code);
3151: }
3152: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3153: '.}\end{center}';
3154:
3155: # Turn stuff back on that we can't be inside of.
3156:
3157: if ($restart_sub) {
3158: $currentstring .= &start_sub($target, $token, $tagstack,
3159: $parstack, $parser, $safeeval);
3160: }
3161: if ($restart_sup) {
3162: $currentstring .= &start_sup($target, $token, $tagstack,
3163: $parstack, $parser, $safeeval);
3164: }
3165: }
3166: return $currentstring;
3167: }
3168:
3169: sub end_applet {
3170: my ($target,$token) = @_;
3171: my $currentstring = '';
3172: if ($target eq 'web' || $target eq 'webgrade') {
3173: $currentstring = $token->[2];
3174: } elsif ($target eq 'tex') {
3175: }
3176: return $currentstring;
3177: }
3178:
3179: #-- <embed> tag (end tag optional/required)
3180: sub start_embed {
3181: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3182: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3183: &Apache::lonxml::extlink($src);
3184: my $currentstring = '';
3185: if ($target eq 'web' || $target eq 'webgrade') {
3186: if ($env{'browser.embedsuppress'} ne 'on') {
3187: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3188: } else {
3189: my $alttag=&Apache::lonxml::get_param
3190: ('alt',$parstack,$safeeval,undef,1);
3191: unless ($alttag) {
3192: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3193: }
3194: $currentstring='[EMBED: '.$alttag.']';
3195: }
3196: } elsif ($target eq 'tex') {
3197: }
3198: return $currentstring;
3199: }
3200:
3201: sub end_embed {
3202: my ($target,$token) = @_;
3203: my $currentstring = '';
3204: if ($target eq 'web' || $target eq 'webgrade') {
3205: $currentstring = $token->[2];
3206: } elsif ($target eq 'tex') {
3207: }
3208: return $currentstring;
3209: }
3210:
3211: #-- <param> tag (end tag forbidden)
3212: sub start_param {
3213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3214: if (&Apache::lonxml::get_param('name',$parstack,
3215: $safeeval,undef,1)=~/^cabbase$/i) {
3216: my $value=&Apache::lonxml::get_param('value',$parstack,
3217: $safeeval,undef,1);
3218: &Apache::lonxml::extlink($value);
3219: }
3220:
3221: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3222: &Apache::lonxml::extlink($src);
3223: my $currentstring = '';
3224: if ($target eq 'web' || $target eq 'webgrade') {
3225: my %toconvert;
3226: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3227: if ($src) { $toconvert{'src'}= $src; }
3228: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3229: undef,1);
3230: if ($name=~/^cabbase$/i) {
3231: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3232: $safeeval,undef,1);
3233: }
3234: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3235: } elsif ($target eq 'tex') {
3236: }
3237: return $currentstring;
3238: }
3239:
3240: sub end_param {
3241: my ($target,$token) = @_;
3242: my $currentstring = '';
3243: if ($target eq 'web' || $target eq 'webgrade') {
3244: $currentstring = $token->[2];
3245: } elsif ($target eq 'tex') {
3246: }
3247: return $currentstring;
3248: }
3249:
3250: #-- <allow> tag
3251: sub start_allow {
3252: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3253: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3254: &Apache::lonxml::extlink($src);
3255:
3256: if ($target eq 'tex') { &image_replication($src); }
3257: my $result;
3258: if ($target eq 'edit') {
3259: $result .=&Apache::edit::tag_start($target,$token);
3260: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3261: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3262: } elsif ($target eq 'modified') {
3263: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3264: $safeeval,'src');
3265: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3266: }
3267: return $result;
3268: }
3269:
3270: sub end_allow {
3271: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3272: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3273: return '';
3274: }
3275:
3276: #-- Frames (end tag required)
3277: #-- <frameset>
3278: sub start_frameset {
3279: my ($target,$token) = @_;
3280: my $currentstring = ''; # Close any pending para.
3281: if ($target eq 'web' || $target eq 'webgrade') {
3282: $currentstring =
3283: &Apache::loncommon::start_page($Apache::londefdef::title,
3284: $Apache::londefdef::head,
3285: {'add_entries' => $token->[2],
3286: 'no_title' => 1,
3287: 'force_register' => 1,
3288: 'frameset' => 1,});
3289:
3290: }
3291: return $currentstring;
3292: }
3293:
3294: sub end_frameset {
3295: my ($target,$token) = @_;
3296: my $currentstring = '';
3297: if ($target eq 'web' || $target eq 'webgrade') {
3298: $currentstring = $token->[2];
3299: }
3300: return $currentstring;
3301: }
3302:
3303: #-- <xmp> (end tag required)
3304: sub start_xmp {
3305: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3306: my $currentstring = '';
3307: if ($target eq 'web' || $target eq 'webgrade') {
3308: $currentstring .= $token->[4];
3309: } elsif ($target eq 'tex') {
3310: $currentstring .= '\begin{verbatim}';
3311: }
3312: return $currentstring;
3313: }
3314:
3315: sub end_xmp {
3316: my ($target,$token) = @_;
3317: my $currentstring = '';
3318: if ($target eq 'web' || $target eq 'webgrade') {
3319: $currentstring .= $token->[2];
3320: } elsif ($target eq 'tex') {
3321: $currentstring .= '\end{verbatim}';
3322: }
3323: return $currentstring;
3324: }
3325:
3326: #-- <pre> (end tag required)
3327: sub start_pre {
3328: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3329: my $currentstring = &end_p(); # close off pending <p>
3330: if ($target eq 'web' || $target eq 'webgrade') {
3331: $currentstring .= $token->[4];
3332: } elsif ($target eq 'tex') {
3333: $currentstring .= '\begin{verbatim}';
3334: &Apache::lonxml::disable_LaTeX_substitutions();
3335: }
3336: return $currentstring;
3337: }
3338:
3339: sub end_pre {
3340: my ($target,$token) = @_;
3341: my $currentstring = '';
3342: if ($target eq 'web' || $target eq 'webgrade') {
3343: $currentstring .= $token->[2];
3344: } elsif ($target eq 'tex') {
3345: $currentstring .= '\end{verbatim}';
3346: &Apache::lonxml::enable_LaTeX_substitutions();
3347: }
3348: return $currentstring;
3349: }
3350:
3351: #-- <insert>
3352: sub start_insert {
3353: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3354: my $currentstring = '';
3355: if ($target eq 'web' || $target eq 'webgrade') {
3356: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3357: $currentstring .= '<b>'.$display.'</b>';;
3358: }
3359: return $currentstring;
3360: }
3361:
3362: sub end_insert {
3363: my ($target,$token) = @_;
3364: my $currentstring = '';
3365: if ($target eq 'web' || $target eq 'webgrade') {
3366: $currentstring .= '';
3367: }
3368: return $currentstring;
3369: }
3370:
3371: #-- <externallink>
3372: sub start_externallink {
3373: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3374: my $currentstring = '';
3375: if ($target eq 'web' || $target eq 'webgrade') {
3376: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3377: $currentstring .= '<b>'.$display.'</b>';;
3378: }
3379: return $currentstring;
3380: }
3381:
3382: sub end_externallink {
3383: my ($target,$token) = @_;
3384: my $currentstring = '';
3385: if ($target eq 'web' || $target eq 'webgrade') {
3386: $currentstring .= '';
3387: }
3388: return $currentstring;
3389: }
3390:
3391: #-- <blankspace heigth="">
3392: sub start_blankspace {
3393: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3394: my $currentstring = &end_p(); # closes off any unclosed <p>
3395: if ($target eq 'tex') {
3396: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3397: $currentstring .= '\vskip '.$howmuch.' ';
3398: }
3399: return $currentstring;
3400: }
3401:
3402: sub end_blankspace {
3403: my ($target,$token) = @_;
3404: my $currentstring = '';
3405: if ($target eq 'tex') {
3406: $currentstring .= '';
3407: }
3408: return $currentstring;
3409: }
3410:
3411: #-- <abbr> tag (end tag required)
3412: sub start_abbr {
3413: my ($target,$token) = @_;
3414: my $currentstring = '';
3415: if ($target eq 'web' || $target eq 'webgrade') {
3416: $currentstring = $token->[4];
3417: }
3418: return $currentstring;
3419: }
3420:
3421: sub end_abbr {
3422: my ($target,$token) = @_;
3423: my $currentstring = '';
3424: if ($target eq 'web' || $target eq 'webgrade') {
3425: $currentstring = $token->[2];
3426: }
3427: return $currentstring;
3428: }
3429:
3430: #-- <acronym> tag (end tag required)
3431: sub start_acronym {
3432: my ($target,$token) = @_;
3433: my $currentstring = '';
3434: if ($target eq 'web' || $target eq 'webgrade') {
3435: $currentstring = $token->[4];
3436: }
3437: return $currentstring;
3438: }
3439:
3440: sub end_acronym {
3441: my ($target,$token) = @_;
3442: my $currentstring = '';
3443: if ($target eq 'web' || $target eq 'webgrade') {
3444: $currentstring = $token->[2];
3445: }
3446: return $currentstring;
3447: }
3448:
3449: #-- <area> tag (end tag forbidden)
3450: sub start_area {
3451: my ($target,$token) = @_;
3452: my $currentstring = '';
3453: if ($target eq 'web' || $target eq 'webgrade') {
3454: $currentstring = $token->[4];
3455: }
3456: return $currentstring;
3457: }
3458:
3459: sub end_area {
3460: my ($target,$token) = @_;
3461: my $currentstring = '';
3462: if ($target eq 'web' || $target eq 'webgrade') {
3463: $currentstring = $token->[2];
3464: }
3465: return $currentstring;
3466: }
3467:
3468: #-- <base> tag (end tag forbidden)
3469: sub start_base {
3470: my ($target,$token) = @_;
3471: my $currentstring = '';
3472: if ($target eq 'web' || $target eq 'webgrade') {
3473: $currentstring = $token->[4];
3474: }
3475: return $currentstring;
3476: }
3477:
3478: sub end_base {
3479: my ($target,$token) = @_;
3480: my $currentstring = '';
3481: if ($target eq 'web' || $target eq 'webgrade') {
3482: $currentstring = $token->[2];
3483: }
3484: return $currentstring;
3485: }
3486:
3487: #-- <bdo> tag (end tag required)
3488: sub start_bdo {
3489: my ($target,$token) = @_;
3490: my $currentstring = '';
3491: if ($target eq 'web' || $target eq 'webgrade') {
3492: $currentstring = $token->[4];
3493: }
3494: return $currentstring;
3495: }
3496:
3497: sub end_bdo {
3498: my ($target,$token) = @_;
3499: my $currentstring = '';
3500: if ($target eq 'web' || $target eq 'webgrade') {
3501: $currentstring = $token->[2];
3502: }
3503: return $currentstring;
3504: }
3505:
3506: #-- <bgsound> tag (end tag optional)
3507: sub start_bgsound {
3508: my ($target,$token) = @_;
3509: my $currentstring = '';
3510: if ($target eq 'web' || $target eq 'webgrade') {
3511: $currentstring = $token->[4];
3512: }
3513: return $currentstring;
3514: }
3515:
3516: sub end_bgsound {
3517: my ($target,$token) = @_;
3518: my $currentstring = '';
3519: if ($target eq 'web' || $target eq 'webgrade') {
3520: $currentstring = $token->[2];
3521: }
3522: return $currentstring;
3523: }
3524:
3525: #-- <blink> tag (end tag required)
3526: sub start_blink {
3527: my ($target,$token) = @_;
3528: my $currentstring = '';
3529: if ($target eq 'web' || $target eq 'webgrade') {
3530: $currentstring = $token->[4];
3531: }
3532: return $currentstring;
3533: }
3534:
3535: sub end_blink {
3536: my ($target,$token) = @_;
3537: my $currentstring = '';
3538: if ($target eq 'web' || $target eq 'webgrade') {
3539: $currentstring = $token->[2];
3540: }
3541: return $currentstring;
3542: }
3543:
3544: #-- <blockquote> tag (end tag required)
3545: sub start_blockquote {
3546: my ($target,$token) = @_;
3547: my $currentstring = &end_p(); # Close any unclosed <p>
3548: if ($target eq 'web' || $target eq 'webgrade') {
3549: $currentstring .= $token->[4];
3550: }
3551: if ($target eq 'tex') {
3552: $currentstring .= '\begin{quote}';
3553: }
3554: return $currentstring;
3555: }
3556:
3557: sub end_blockquote {
3558: my ($target,$token) = @_;
3559: my $currentstring = '';
3560: if ($target eq 'web' || $target eq 'webgrade') {
3561: $currentstring = $token->[2];
3562: }
3563: if ($target eq 'tex') {
3564: $currentstring = '\end{quote}';
3565: }
3566: return $currentstring;
3567: }
3568:
3569: #-- <button> tag (end tag required)
3570: sub start_button {
3571: my ($target,$token) = @_;
3572: my $currentstring = '';
3573: if ($target eq 'web' || $target eq 'webgrade') {
3574: $currentstring = $token->[4];
3575: }
3576: return $currentstring;
3577: }
3578:
3579: sub end_button {
3580: my ($target,$token) = @_;
3581: my $currentstring = '';
3582: if ($target eq 'web' || $target eq 'webgrade') {
3583: $currentstring = $token->[2];
3584: }
3585: return $currentstring;
3586: }
3587:
3588: #-- <caption> tag (end tag required)
3589: sub start_caption {
3590: my ($target,$token) = @_;
3591: my $currentstring = '';
3592: if ($target eq 'web' || $target eq 'webgrade') {
3593: $currentstring = $token->[4];
3594: }
3595: return $currentstring;
3596: }
3597:
3598: sub end_caption {
3599: my ($target,$token) = @_;
3600: my $currentstring = '';
3601: if ($target eq 'web' || $target eq 'webgrade') {
3602: $currentstring = $token->[2];
3603: }
3604: return $currentstring;
3605: }
3606:
3607: #-- <col> tag (end tag forbdden)
3608: sub start_col {
3609: my ($target,$token) = @_;
3610: my $currentstring = '';
3611: if ($target eq 'web' || $target eq 'webgrade') {
3612: $currentstring = $token->[4];
3613: }
3614: return $currentstring;
3615: }
3616:
3617: sub end_col {
3618: my ($target,$token) = @_;
3619: my $currentstring = '';
3620: if ($target eq 'web' || $target eq 'webgrade') {
3621: $currentstring = $token->[2];
3622: }
3623: return $currentstring;
3624: }
3625:
3626: #-- <colgroup> tag (end tag optional)
3627: sub start_colgroup {
3628: my ($target,$token) = @_;
3629: my $currentstring = '';
3630: if ($target eq 'web' || $target eq 'webgrade') {
3631: $currentstring = $token->[4];
3632: }
3633: return $currentstring;
3634: }
3635:
3636: sub end_colgroup {
3637: my ($target,$token) = @_;
3638: my $currentstring = '';
3639: if ($target eq 'web' || $target eq 'webgrade') {
3640: $currentstring = $token->[2];
3641: }
3642: return $currentstring;
3643: }
3644:
3645: #-- <del> tag (end tag required)
3646: sub start_del {
3647: my ($target,$token) = @_;
3648: my $currentstring = '';
3649: if ($target eq 'web' || $target eq 'webgrade') {
3650: $currentstring = $token->[4];
3651: }
3652: return $currentstring;
3653: }
3654:
3655: sub end_del {
3656: my ($target,$token) = @_;
3657: my $currentstring = '';
3658: if ($target eq 'web' || $target eq 'webgrade') {
3659: $currentstring = $token->[2];
3660: }
3661: return $currentstring;
3662: }
3663:
3664: #-- <fieldset> tag (end tag required)
3665: sub start_fieldset {
3666: my ($target,$token) = @_;
3667: my $currentstring = '';
3668: if ($target eq 'web' || $target eq 'webgrade') {
3669: $currentstring = $token->[4];
3670: }
3671: return $currentstring;
3672: }
3673:
3674: sub end_fieldset {
3675: my ($target,$token) = @_;
3676: my $currentstring = '';
3677: if ($target eq 'web' || $target eq 'webgrade') {
3678: $currentstring = $token->[2];
3679: }
3680: return $currentstring;
3681: }
3682:
3683: #-- <frame> tag (end tag forbidden)
3684: sub start_frame {
3685: my ($target,$token) = @_;
3686: my $currentstring = '';
3687: if ($target eq 'web' || $target eq 'webgrade') {
3688: $currentstring = $token->[4];
3689: }
3690: return $currentstring;
3691: }
3692:
3693: sub end_frame {
3694: my ($target,$token) = @_;
3695: my $currentstring = '';
3696: if ($target eq 'web' || $target eq 'webgrade') {
3697: $currentstring = $token->[2];
3698: }
3699: return $currentstring;
3700: }
3701:
3702: #-- <iframe> tag (end tag required)
3703: sub start_iframe {
3704: my ($target,$token) = @_;
3705: my $currentstring = '';
3706: if ($target eq 'web' || $target eq 'webgrade') {
3707: $currentstring = $token->[4];
3708: }
3709: return $currentstring;
3710: }
3711:
3712: sub end_iframe {
3713: my ($target,$token) = @_;
3714: my $currentstring = '';
3715: if ($target eq 'web' || $target eq 'webgrade') {
3716: $currentstring = $token->[2];
3717: }
3718: return $currentstring;
3719: }
3720:
3721: #-- <ins> tag (end tag required)
3722: sub start_ins {
3723: my ($target,$token) = @_;
3724: my $currentstring = '';
3725: if ($target eq 'web' || $target eq 'webgrade') {
3726: $currentstring = $token->[4];
3727: }
3728: return $currentstring;
3729: }
3730:
3731: sub end_ins {
3732: my ($target,$token) = @_;
3733: my $currentstring = '';
3734: if ($target eq 'web' || $target eq 'webgrade') {
3735: $currentstring = $token->[2];
3736: }
3737: return $currentstring;
3738: }
3739:
3740: #-- <isindex> tag (end tag forbidden)
3741: sub start_isindex {
3742: my ($target,$token) = @_;
3743: my $currentstring = '';
3744: if ($target eq 'web' || $target eq 'webgrade') {
3745: $currentstring = $token->[4];
3746: }
3747: return $currentstring;
3748: }
3749:
3750: sub end_isindex {
3751: my ($target,$token) = @_;
3752: my $currentstring = '';
3753: if ($target eq 'web' || $target eq 'webgrade') {
3754: $currentstring = $token->[2];
3755: }
3756: return $currentstring;
3757: }
3758:
3759: #-- <keygen> tag (end tag forbidden)
3760: sub start_keygen {
3761: my ($target,$token) = @_;
3762: my $currentstring = '';
3763: if ($target eq 'web' || $target eq 'webgrade') {
3764: $currentstring = $token->[4];
3765: }
3766: return $currentstring;
3767: }
3768:
3769: sub end_keygen {
3770: my ($target,$token) = @_;
3771: my $currentstring = '';
3772: if ($target eq 'web' || $target eq 'webgrade') {
3773: $currentstring = $token->[2];
3774: }
3775: return $currentstring;
3776: }
3777:
3778: #-- <label> tag
3779: sub start_label {
3780: my ($target,$token) = @_;
3781: my $currentstring = '';
3782: if ($target eq 'web' || $target eq 'webgrade') {
3783: $currentstring = $token->[4];
3784: }
3785: return $currentstring;
3786: }
3787:
3788: sub end_label {
3789: my ($target,$token) = @_;
3790: my $currentstring = '';
3791: if ($target eq 'web' || $target eq 'webgrade') {
3792: $currentstring = $token->[2];
3793: }
3794: return $currentstring;
3795: }
3796:
3797: #-- <layer> tag (end tag required)
3798: sub start_layer {
3799: my ($target,$token) = @_;
3800: my $currentstring = '';
3801: if ($target eq 'web' || $target eq 'webgrade') {
3802: $currentstring = $token->[4];
3803: }
3804: return $currentstring;
3805: }
3806:
3807: sub end_layer {
3808: my ($target,$token) = @_;
3809: my $currentstring = '';
3810: if ($target eq 'web' || $target eq 'webgrade') {
3811: $currentstring = $token->[2];
3812: }
3813: return $currentstring;
3814: }
3815:
3816: #-- <legend> tag (end tag required)
3817: sub start_legend {
3818: my ($target,$token) = @_;
3819: my $currentstring = '';
3820: if ($target eq 'web' || $target eq 'webgrade') {
3821: $currentstring = $token->[4];
3822: }
3823: return $currentstring;
3824: }
3825:
3826: sub end_legend {
3827: my ($target,$token) = @_;
3828: my $currentstring = '';
3829: if ($target eq 'web' || $target eq 'webgrade') {
3830: $currentstring = $token->[2];
3831: }
3832: return $currentstring;
3833: }
3834:
3835: #-- <link> tag (end tag forbidden)
3836: sub start_link {
3837: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3838: my $currentstring = '';
3839: if ($target eq 'web' || $target eq 'webgrade') {
3840: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3841: undef,1);
3842: &Apache::lonxml::extlink($href);
3843: $currentstring = $token->[4];
3844: }
3845: return $currentstring;
3846: }
3847:
3848: sub end_link {
3849: my ($target,$token) = @_;
3850: my $currentstring = '';
3851: if ($target eq 'web' || $target eq 'webgrade') {
3852: $currentstring = $token->[2];
3853: }
3854: return $currentstring;
3855: }
3856:
3857: #-- <marquee> tag (end tag optional)
3858: sub start_marquee {
3859: my ($target,$token) = @_;
3860: my $currentstring = '';
3861: if ($target eq 'web' || $target eq 'webgrade') {
3862: $currentstring = $token->[4];
3863: }
3864: return $currentstring;
3865: }
3866:
3867: sub end_marquee {
3868: my ($target,$token) = @_;
3869: my $currentstring = '';
3870: if ($target eq 'web' || $target eq 'webgrade') {
3871: $currentstring = $token->[2];
3872: }
3873: return $currentstring;
3874: }
3875:
3876: #-- <multicol> tag (end tag required)
3877: sub start_multicol {
3878: my ($target,$token) = @_;
3879: my $currentstring = &end_p(); # Close any pending <p>
3880: if ($target eq 'web' || $target eq 'webgrade') {
3881: $currentstring .= $token->[4];
3882: }
3883: return $currentstring;
3884: }
3885:
3886: sub end_multicol {
3887: my ($target,$token) = @_;
3888: my $currentstring = '';
3889: if ($target eq 'web' || $target eq 'webgrade') {
3890: $currentstring = $token->[2];
3891: }
3892: return $currentstring;
3893: }
3894:
3895: #-- <nobr> tag (end tag required)
3896: sub start_nobr {
3897: my ($target,$token) = @_;
3898: my $currentstring = '';
3899: if ($target eq 'web' || $target eq 'webgrade') {
3900: $currentstring = $token->[4];
3901: } elsif ($target eq 'tex') {
3902: $currentstring='\mbox{';
3903: }
3904: return $currentstring;
3905: }
3906:
3907: sub end_nobr {
3908: my ($target,$token) = @_;
3909: my $currentstring = '';
3910: if ($target eq 'web' || $target eq 'webgrade') {
3911: $currentstring = $token->[2];
3912: } elsif ($target eq 'tex') {
3913: $currentstring='}';
3914: }
3915: return $currentstring;
3916: }
3917:
3918: #-- <noembed> tag (end tag required)
3919: sub start_noembed {
3920: my ($target,$token) = @_;
3921: my $currentstring = '';
3922: if ($target eq 'web' || $target eq 'webgrade') {
3923: $currentstring = $token->[4];
3924: }
3925: return $currentstring;
3926: }
3927:
3928: sub end_noembed {
3929: my ($target,$token) = @_;
3930: my $currentstring = '';
3931: if ($target eq 'web' || $target eq 'webgrade') {
3932: $currentstring = $token->[2];
3933: }
3934: return $currentstring;
3935: }
3936:
3937: #-- <noframes> tag (end tag required)
3938: sub start_noframes {
3939: my ($target,$token) = @_;
3940: my $currentstring = '';
3941: if ($target eq 'web' || $target eq 'webgrade') {
3942: $currentstring = $token->[4];
3943: }
3944: return $currentstring;
3945: }
3946:
3947: sub end_noframes {
3948: my ($target,$token) = @_;
3949: my $currentstring = '';
3950: if ($target eq 'web' || $target eq 'webgrade') {
3951: $currentstring = $token->[2];
3952: }
3953: return $currentstring;
3954: }
3955:
3956: #-- <nolayer> tag (end tag required)
3957: sub start_nolayer {
3958: my ($target,$token) = @_;
3959: my $currentstring = '';
3960: if ($target eq 'web' || $target eq 'webgrade') {
3961: $currentstring = $token->[4];
3962: }
3963: return $currentstring;
3964: }
3965:
3966: sub end_nolayer {
3967: my ($target,$token) = @_;
3968: my $currentstring = '';
3969: if ($target eq 'web' || $target eq 'webgrade') {
3970: $currentstring = $token->[2];
3971: }
3972: return $currentstring;
3973: }
3974:
3975: #-- <noscript> tag (end tag required)
3976: sub start_noscript {
3977: my ($target,$token) = @_;
3978: my $currentstring = '';
3979: if ($target eq 'web' || $target eq 'webgrade') {
3980: $currentstring = $token->[4];
3981: }
3982: return $currentstring;
3983: }
3984:
3985: sub end_noscript {
3986: my ($target,$token) = @_;
3987: my $currentstring = '';
3988: if ($target eq 'web' || $target eq 'webgrade') {
3989: $currentstring = $token->[2];
3990: }
3991: return $currentstring;
3992: }
3993:
3994: #-- <object> tag (end tag required)
3995: sub start_object {
3996: my ($target,$token) = @_;
3997: my $currentstring = '';
3998: if ($target eq 'web' || $target eq 'webgrade') {
3999: $currentstring = $token->[4];
4000: }
4001: return $currentstring;
4002: }
4003:
4004: sub end_object {
4005: my ($target,$token) = @_;
4006: my $currentstring = '';
4007: if ($target eq 'web' || $target eq 'webgrade') {
4008: $currentstring = $token->[2];
4009: }
4010: return $currentstring;
4011: }
4012:
4013: #-- <optgroup> tag (end tag required)
4014: sub start_optgroup {
4015: my ($target,$token) = @_;
4016: my $currentstring = '';
4017: if ($target eq 'web' || $target eq 'webgrade') {
4018: $currentstring = $token->[4];
4019: }
4020: return $currentstring;
4021: }
4022:
4023: sub end_optgroup {
4024: my ($target,$token) = @_;
4025: my $currentstring = '';
4026: if ($target eq 'web' || $target eq 'webgrade') {
4027: $currentstring = $token->[2];
4028: }
4029: return $currentstring;
4030: }
4031:
4032: #-- <samp> tag (end tag required)
4033: sub start_samp {
4034: my ($target,$token) = @_;
4035: my $currentstring = '';
4036: if ($target eq 'web' || $target eq 'webgrade') {
4037: $currentstring = $token->[4];
4038: } elsif ($target eq 'tex') {
4039: $currentstring='\texttt{';
4040: }
4041: return $currentstring;
4042: }
4043:
4044: sub end_samp {
4045: my ($target,$token) = @_;
4046: my $currentstring = '';
4047: if ($target eq 'web' || $target eq 'webgrade') {
4048: $currentstring = $token->[2];
4049: } elsif ($target eq 'tex') {
4050: $currentstring='}';
4051: }
4052: return $currentstring;
4053: }
4054:
4055: #-- <server> tag
4056: sub start_server {
4057: my ($target,$token) = @_;
4058: my $currentstring = '';
4059: if ($target eq 'web' || $target eq 'webgrade') {
4060: $currentstring = $token->[4];
4061: }
4062: return $currentstring;
4063: }
4064:
4065: sub end_server {
4066: my ($target,$token) = @_;
4067: my $currentstring = '';
4068: if ($target eq 'web' || $target eq 'webgrade') {
4069: $currentstring = $token->[2];
4070: }
4071: return $currentstring;
4072: }
4073:
4074: #-- <spacer> tag (end tag forbidden)
4075: sub start_spacer {
4076: my ($target,$token) = @_;
4077: my $currentstring = &end_p(); # Close off any open <p> tag.
4078: if ($target eq 'web' || $target eq 'webgrade') {
4079: $currentstring .= $token->[4];
4080: }
4081: return $currentstring;
4082: }
4083:
4084: sub end_spacer {
4085: my ($target,$token) = @_;
4086: my $currentstring = '';
4087: if ($target eq 'web' || $target eq 'webgrade') {
4088: $currentstring = $token->[2];
4089: }
4090: return $currentstring;
4091: }
4092:
4093: #-- <span> tag (end tag required)
4094: sub start_span {
4095: my ($target,$token) = @_;
4096: my $currentstring = '';
4097: if ($target eq 'web' || $target eq 'webgrade') {
4098: $currentstring = $token->[4];
4099: }
4100: return $currentstring;
4101: }
4102:
4103: sub end_span {
4104: my ($target,$token) = @_;
4105: my $currentstring = '';
4106: if ($target eq 'web' || $target eq 'webgrade') {
4107: $currentstring = $token->[2];
4108: }
4109: return $currentstring;
4110: }
4111:
4112: #-- <tbody> tag (end tag optional)
4113: sub start_tbody {
4114: my ($target,$token) = @_;
4115: my $currentstring = '';
4116: if ($target eq 'web' || $target eq 'webgrade') {
4117: $currentstring = $token->[4];
4118: }
4119: return $currentstring;
4120: }
4121:
4122: sub end_tbody {
4123: my ($target,$token) = @_;
4124: my $currentstring = '';
4125: if ($target eq 'web' || $target eq 'webgrade') {
4126: $currentstring = $token->[2];
4127: }
4128: return $currentstring;
4129: }
4130:
4131: #-- <tfoot> tag (end tag optional)
4132: sub start_tfoot {
4133: my ($target,$token) = @_;
4134: my $currentstring = '';
4135: if ($target eq 'web' || $target eq 'webgrade') {
4136: $currentstring = $token->[4];
4137: }
4138: return $currentstring;
4139: }
4140:
4141: sub end_tfoot {
4142: my ($target,$token) = @_;
4143: my $currentstring = '';
4144: if ($target eq 'web' || $target eq 'webgrade') {
4145: $currentstring = $token->[2];
4146: }
4147: return $currentstring;
4148: }
4149:
4150: #-- <thead> tag (end tag optional)
4151: sub start_thead {
4152: my ($target,$token) = @_;
4153: my $currentstring = '';
4154: if ($target eq 'web' || $target eq 'webgrade') {
4155: $currentstring = $token->[4];
4156: }
4157: return $currentstring;
4158: }
4159:
4160: sub end_thead {
4161: my ($target,$token) = @_;
4162: my $currentstring = '';
4163: if ($target eq 'web' || $target eq 'webgrade') {
4164: $currentstring = $token->[2];
4165: }
4166: return $currentstring;
4167: }
4168:
4169: #-- <var> tag
4170: sub start_var {
4171: my ($target,$token) = @_;
4172: my $currentstring = '';
4173: if ($target eq 'web' || $target eq 'webgrade') {
4174: $currentstring = $token->[4];
4175: } elsif ($target eq 'tex') {
4176: $currentstring = '\textit{';
4177: }
4178: return $currentstring;
4179: }
4180:
4181: sub end_var {
4182: my ($target,$token) = @_;
4183: my $currentstring = '';
4184: if ($target eq 'web' || $target eq 'webgrade') {
4185: $currentstring = $token->[2];
4186: } elsif ($target eq 'tex') {
4187: $currentstring = '}';
4188: }
4189: return $currentstring;
4190: }
4191:
4192: #-- <wbr> tag (end tag forbidden)
4193: sub start_wbr {
4194: my ($target,$token) = @_;
4195: my $currentstring = '';
4196: if ($target eq 'web' || $target eq 'webgrade') {
4197: $currentstring = $token->[4];
4198: }
4199: return $currentstring;
4200: }
4201:
4202: sub end_wbr {
4203: my ($target,$token) = @_;
4204: my $currentstring = '';
4205: if ($target eq 'web' || $target eq 'webgrade') {
4206: $currentstring = $token->[2];
4207: }
4208: return $currentstring;
4209: }
4210:
4211: #-- <hideweboutput> tag
4212: sub start_hideweboutput {
4213: my ($target,$token) = @_;
4214: if ($target eq 'web' || $target eq 'webgrade') {
4215: &Apache::lonxml::startredirection();
4216: }
4217: return '';
4218: }
4219:
4220: sub end_hideweboutput {
4221: my ($target,$token) = @_;
4222: my $currentstring = '';
4223: if ($target eq 'web' || $target eq 'webgrade') {
4224: $currentstring = &Apache::lonxml::endredirection();
4225: }
4226: return '';
4227: }
4228:
4229:
4230: sub image_replication {
4231: my $src = shift;
4232: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4233: #replicates eps or ps
4234: my $epssrc = my $pssrc = $src;
4235: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4236: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4237: if (not -e $epssrc && not -e $pssrc) {
4238: my $result=&Apache::lonnet::repcopy($epssrc);
4239: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4240: }
4241: return '';
4242: }
4243: #
4244: # Get correct sizing parameter for an image given
4245: # it's initial ht. and wid. This allows sizing of
4246: # images that are generated on-the-fly (e.g. gnuplot)
4247: # as well as serving as a utility for image_size.
4248: #
4249: # Parameter:
4250: # height_param
4251: # width_param - Initial picture dimensions.
4252: # scaling - A scale factor.
4253: # parstack, - the current stack of tag attributes
4254: # from the xml parser
4255: # safeeval, - pointer to the safespace
4256: # depth, - from what level in the stack to look for attributes
4257: # (assumes -1 if unspecified)
4258: # cis - look for attrubutes case insensitively
4259: # (assumes false)
4260: #
4261: # Returns:
4262: # height, width - new dimensions.
4263: #
4264: sub resize_image {
4265: my ($height_param, $width_param, $scaling,
4266: $parstack, $safeeval, $depth, $cis) = @_;
4267:
4268: # First apply the scaling...
4269:
4270: $height_param = $height_param * $scaling;
4271: $width_param = $width_param * $scaling;
4272:
4273: #do we have any specified LaTeX size of the picture?
4274: my $toget='TeXwidth';
4275: if ($cis) {
4276: $toget=lc($toget);
4277: }
4278: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4279: $safeeval,$depth,$cis);
4280: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4281: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4282: $safeeval,$depth,$cis);
4283: #do we have any specified web size of the picture?
4284: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4285: $depth,1);
4286: if ($TeXwidth) {
4287: my $old_width_param=$width_param;
4288: if ($TeXwidth=~/(\d+)\s*\%/) {
4289: $width_param = $1*$env{'form.textwidth'}/100;
4290: } else {
4291: $width_param = $TeXwidth;
4292: }
4293: if ($TeXheight) {
4294: $height_param = $TeXheight;
4295: } elsif ($old_width_param) {
4296: $height_param=$TeXwidth/$old_width_param*$height_param;
4297: }
4298: } elsif ($TeXheight) {
4299: $height_param = $TeXheight;
4300: if ($height_param) {
4301: $width_param = $TeXheight/$height_param*$width_param;
4302: }
4303: } elsif ($width) {
4304: my $old_width_param=$width_param;
4305: $width_param = $width*$scaling;
4306: if ($old_width_param) {
4307: $height_param=$width_param/$old_width_param*$height_param;
4308: }
4309: }
4310: if ($width_param > $env{'form.textwidth'}) {
4311: my $old_width_param=$width_param;
4312: $width_param =0.95*$env{'form.textwidth'};
4313: if ($old_width_param) {
4314: $height_param=$width_param/$old_width_param*$height_param;
4315: }
4316: }
4317:
4318: return ($height_param, $width_param);
4319: }
4320:
4321: sub image_size {
4322: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4323:
4324: #size of image from gif/jpg/jpeg/png
4325: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4326: if (-e $ressrc) {
4327: $src = $ressrc;
4328: }
4329: my $image = Image::Magick->new;
4330: my $current_figure = $image->Read($src);
4331: my $width_param = $image->Get('width');
4332: my $height_param = $image->Get('height');
4333: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4334: undef($image);
4335:
4336: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4337: $scaling, $parstack, $safeeval,
4338: $depth, $cis);
4339:
4340: return ($height_param, $width_param);
4341: }
4342:
4343: sub image_width {
4344: my ($height, $width) = &image_size(@_);
4345: return $width;
4346: }
4347: # Not yet 100% sure this is correct in all circumstances..
4348: # due to my uncertainty about mods to image_size.
4349: #
4350: sub image_height {
4351: my ($height, $width) = &image_size(@_);
4352: return $height;
4353: }
4354:
4355: sub get_eps_image {
4356: my ($src)=@_;
4357: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4358:
4359: # In order to prevent the substitution of the alt text, we need to
4360: # be sure the orig_src file is on system now so:
4361:
4362: if (! -e $orig_src) {
4363: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4364: }
4365: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4366: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4367: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4368: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4369: &Apache::lonxml::debug("Filelocation gives: $src");
4370: if (! -e $src) {
4371: &Apache::lonxml::debug("$src does not exist");
4372: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4373: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4374: #if replication failed try to find ps file
4375: $src=~s/\.eps$/\.ps/;
4376: &Apache::lonxml::debug("Now looking for $src");
4377: #if no ps file try to replicate it.
4378: my $didrepcopy = &Apache::lonnet::repcopy($src);
4379: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4380: if ( (not -e $src) ||
4381: ($didrepcopy ne 'ok')) {
4382: &Apache::lonxml::debug("Failed to find or replicate $src");
4383:
4384: #if replication failed try to produce eps file dynamically
4385: $src=~s/\.ps$/\.eps/;
4386: my $temp_file;
4387: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4388: my $newsrc=$orig_src;
4389: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4390: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4391: print FILE ("$newsrc\n");
4392: close(FILE);
4393: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4394: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4395: if ($sext ne "") { # Put the ext. back in to uniquify.
4396: $src =~ s/\.eps$/$sext.eps/;
4397: }
4398:
4399: }
4400:
4401: }
4402: } else {
4403: # If the postscript file has spaces in its name,
4404: # LaTeX will gratuitiously vomit. Therefore
4405: # queue such files for copy with " " replaced by "_".
4406: # printout.pm will know them by their .ps or .eps extensions.
4407: my $newsrc = $orig_src;
4408: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4409: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4410: print FILE "$src\n";
4411: close FILE;
4412: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4413: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4414: }
4415: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4416: $path =~ s/ /\_/g;
4417: $file =~ s/ /\_/g;
4418: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4419: return ($path.'/',$file);
4420: }
4421:
4422: sub eps_generation {
4423: my ($src,$file,$width_param) = @_;
4424: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4425: my $temp_file = Apache::File->new('>>'.$filename);
4426: print $temp_file "$src\n";
4427: my $newsrc = $src;
4428: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4429: $newsrc=~s{/home/httpd/html/res}{};
4430: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4431: $newsrc=~s{/\./}{/};
4432: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4433: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4434: $newsrc=~s{/home/httpd/lonUsers}{};
4435: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4436: }
4437: if ($newsrc=~m{/userfiles/}) {
4438: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4439: } else {
4440: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4441: }
4442: }
4443:
4444: sub file_path {
4445: my $src=shift;
4446: my ($file,$path);
4447: if ($src =~ m!(.*)/([^/]*)$!) {
4448: $file = $2;
4449: $path = $1.'/';
4450: }
4451: return $file,$path;
4452: }
4453: # Converts a measurement in to mm from any of
4454: # the other valid LaTeX units of measure.
4455: # If the units of measure are missing from the
4456: # parameter, it is assumed to be in and returned
4457: # with mm units of measure
4458: sub recalc {
4459: my $argument = shift;
4460: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4461: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4462: my $value=$1;
4463: my $units=$2;
4464: if ($units eq 'cm') {
4465: $value*=10;
4466: } elsif ($units eq 'in') {
4467: $value*=25.4;
4468: } elsif ($units eq 'pc') {
4469: $value*=(25.4*12/72.27);
4470: } elsif ($units eq 'pt') {
4471: $value*=(25.4/72.27);
4472: }
4473: return $value.' mm';
4474: }
4475:
4476: sub LATEX_length {
4477: my $garbage=shift;
4478: $garbage=~s/^\s+$//;
4479: $garbage=~s/^\s+(\S.*)/$1/;#space before
4480: $garbage=~s/(.*\S)\s+$/$1/;#space after
4481: $garbage=~s/(\s)+/$1/;#only one space
4482: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4483: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4484: $garbage=~s/([^\\])\$/$1/g;#$
4485: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4486: $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;
4487: $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;
4488: $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;
4489: $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;
4490: $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;
4491: $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;
4492: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4493: #remove some other LaTeX command
4494: $garbage=~s|\\(\w+)\\|\\|g;
4495: $garbage=~s|\\(\w+)(\s*)|$2|g;
4496: $garbage=~s|\+|11|g;
4497: my $value=length($garbage);
4498: return $value;
4499: }
4500:
4501: # Wrap image 'stuff' inside of the LaTeX required to implement
4502: # alignment:
4503: # align_tex_image(align, latex_rendering, image)
4504: # Where:
4505: # align - The HTML alignment specification.
4506: # latex_rendering - rendering hint for latex.
4507: # image - The LaTeX needed to insert the image itsef.
4508: # width,height - dimensions of the image.
4509: # Returns:
4510: # The 1/2 wrapped image and the stuff required to close the
4511: # wrappage. This allows e.g. randomlabel to insert more stuff
4512: # into the closure.
4513: #
4514: sub align_latex_image {
4515: my ($align, $latex_rendering, $image, $width, $height) = @_;
4516: my $currentstring; # The 1/2 wrapped image.
4517: my $closure; # The closure of the wrappage.
4518: # If there's an alignment specification we need to honor it here.
4519: # For the horizontal alignments, we will also honor the
4520: # value of the latex specfication. The default is parbox,
4521: # and that's used for illegal values too.
4522: #
4523: # Even though we set a default alignment value, the user
4524: # could have given us an illegal value. In that case we
4525: # just use the default alignment of bottom..
4526: $currentstring = "\n% figurewrapping \n";
4527: if ($align eq "top") {
4528: $currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
4529: $closure = '}';
4530: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4531: my $offset = $height/2;
4532: $currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
4533: $closure = '}';
4534: } elsif ($align eq "left") {
4535: if ($latex_rendering eq "parpic") {
4536: $currentstring .= '\parpic[l]{'.$image;
4537: $closure = '}';
4538: } elsif ($latex_rendering eq "parbox") {
4539: $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
4540: .$image;
4541: $closure = '\end{minipage}';
4542: } elsif ($latex_rendering eq "wrapfigure"
4543: || $latex_rendering ne 'none') { # wrapfig render
4544: $currentstring .=
4545: '\begin{wrapfigure}{l}{'.$width.'mm}'
4546: .'\scalebox{1.0}{'.$image;
4547: $closure = '}\end{wrapfigure}';
4548: }
4549: } elsif ($align eq "right") {
4550: if ($latex_rendering eq "parpic") {
4551: $currentstring .= '\parpic[r]{'.$image;
4552: $closure = '}';
4553: } elsif ($latex_rendering eq "parbox") {
4554: $currentstring .= '\begin{minipage}[r]{'.$width.'mm}'
4555: .$image;
4556: $closure = '\end{minipage}';
4557: } elsif ($latex_rendering eq "wrapfigure"
4558: || $latex_rendering ne 'none') { # wrapfig render
4559: $currentstring .=
4560: '\begin{wrapfigure}{r}{'.$width.'mm}'
4561: .'\scalebox{1.0}{'.$image;
4562: $closure = '}\end{wrapfigure}';
4563: }
4564: } else { # Bottom is also default.
4565: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4566: $currentstring .= "{$image";
4567: $closure = '}';
4568: }
4569: $currentstring .= "\n% end wrappage\n";
4570: $closure = "\n% Begin closure\n".$closure."\n% End closure\n";
4571: return ($currentstring, $closure);
4572: }
4573:
4574: # is_inside_of $tagstack $tag
4575: # This sub returns true if the current state of Xml processing
4576: # is inside of the tag.
4577: # Parameters:
4578: # tagstack - The tagstack from the parser.
4579: # tag - The tag (without the <>'s.).
4580: # Sample usage:
4581: # if (is_inside_of($tagstack "table")) {
4582: # # I'm in a table....
4583: # }
4584: sub is_inside_of {
4585: my ($tagstack, $tag) = @_;
4586: my @stack = @$tagstack;
4587: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4588: if ($stack[$i] eq $tag) {
4589: return 1;
4590: }
4591: }
4592: return 0;
4593: }
4594:
4595:
4596: 1;
4597: __END__
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