1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.371 2007/06/26 01:36:48 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[$i];
2260: }
2261: if ($current == 0) {
2262: $current = $Apache::londefdef::table[-1]{'width'};
2263: }
2264: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2265: for (my $i=0;$i<=$#fwidth;$i++) {
2266: $fwidth[$i]*=$coef;
2267: }
2268: #removing of empty columns if allowed
2269: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2270: if ($permission eq 'yes') {
2271: my @cleaned_table=();
2272: my @cleaned_header=();
2273: my $colind=0;
2274: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2275: if ($fwidth[$jn]!=0) {
2276: #we need to copy column
2277: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2278: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2279: $cleaned_header[$colind]=$fwidth[$jn];
2280: }
2281: $colind++;
2282: }
2283: }
2284: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2285: @fwidth=@cleaned_header;
2286: }
2287:
2288:
2289: #construct header of the table
2290: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2291: for (my $in=0;$in<=$#fwidth;$in++) {
2292: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2293: }
2294: $header_of_table .= '}';
2295:
2296: #fill the table
2297: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2298: my $have_rowspan = 0;
2299: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2300:
2301: #-----------------------------------------------------------
2302: # I think this order of doing things will ensure that
2303: # single rowspan, columspan and combined row/colspans will
2304: # work correctly. LaTeX is delicate here.
2305: # RF.
2306:
2307: # Start a rowspan if necessary:
2308:
2309: my $primary_col_width = $fwidth[$jn]; # Width of primary column.
2310: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2311: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2312: #
2313: # Do the appropriate magic if this has a colspan
2314: #
2315:
2316: my $spanwidth = 0;
2317: if ($colspan > 1) {
2318: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2319: $spanwidth += $fwidth[$spancol];
2320: }
2321: $output .= '\multicolumn{'.
2322: $colspan
2323: ."}";
2324: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2325: $output .= '{|c|}{';
2326: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2327: $output .= '{|r|}{';
2328: }
2329: else {
2330: $output .= "{|p{$spanwidth mm}|}{";
2331: }
2332:
2333: } else {
2334: $spanwidth = $primary_col_width; # If no span width will be just colwidth
2335: }
2336:
2337: # Rowspan... if colspan is 1, and there's an alignment we'll need
2338: # to kick in a multicolumn in order to get the alignment spec.
2339: # this must precede the multirow or LaTex gets quite upset.
2340: # Naturally if colspan > 1 we've already done that above ^
2341: #
2342: my $multirow_aligned = 0;
2343: if ($rowspan > 1) {
2344: if ($colspan == 1) {
2345: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2346: $output .= '\multicolumn{1}{|c|}{';
2347: $multirow_aligned = 1;
2348: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2349: $output .= '\multicolumn{1}{|r|}{';
2350: $multirow_aligned = 1;
2351: }
2352: }
2353: $have_rowspan++;
2354: if ($multirow_aligned) {
2355: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2356: } else {
2357: $output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
2358: }
2359:
2360: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2361: s{^\s*\\par\s*}{};
2362: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2363: s{\s*\\vskip\s*0pt\s*$}{};
2364:
2365: #
2366: # If we did not throw in a multicolumn to align, then add
2367: # an extra {
2368: # so we close correctly without having to keep additional state
2369: # around
2370: #
2371: if (!$multirow_aligned) {
2372: $output .= '{';
2373: }
2374: }
2375: if (($rowspan eq '^') || ($rowspan eq '_')) {
2376: $have_rowspan++;
2377: }
2378: #--------------------------------------------------------------
2379:
2380:
2381: # For right and center alignment of single cells.
2382: # we are going to use a multicolumn with a span of 1 to specify alignment.
2383: #
2384: if ($colspan == 1 && $rowspan == 1) {
2385: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2386: $output .= '\multicolumn{1}{|c|}{';
2387: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2388: $output .= '\multicolumn{1}{|r|}{';
2389: }
2390: }
2391:
2392: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2393:
2394: if (($colspan == 1 && $rowspan == 1) &&
2395: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2396: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2397: $output .= '}';
2398: }
2399:
2400: # Close off any open multirow:
2401:
2402: if ($rowspan > 1) {
2403: $output .= '}}';
2404: }
2405: # Close off the colspan...
2406: #
2407: if ($colspan > 1) {
2408: $output .= '}';
2409: $jn += $colspan-1; # Adjust for number of rows really left.
2410: }
2411: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2412: }
2413: # If have_rowspan > 0, and borders are on, then
2414: # we need to do more than put an \hline at the bottom of row.
2415: # we need to do the appropriate \cline to ensure that
2416: # the spanned rows don't have \hlines through them.
2417:
2418: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2419: $output .= ' \\\\ ';
2420: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2421: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2422: if ($rowspan ne "^") {
2423: if (($rowspan <= 1) || ($rowspan eq '_')) {
2424: my $column = $jn+1;
2425: $output .= '\cline{'.$column.'-'.$column.'} ';
2426: }
2427: }
2428: }
2429:
2430: } else {
2431: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2432: }
2433: }
2434: # Note that \newline destroys alignment env's produced by e.g. <div>
2435: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2436: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2437: if ($#Apache::londefdef::table > 0) {
2438: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2439: # Figure out max/and min width by summing us and then
2440: # apply that to the current column of the table we nest in
2441: # if it's larger than the current width or the current width
2442: # is undefined.
2443: #
2444: my $min_nested_width = 0;
2445: my $max_nested_width = 0;
2446: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2447: $min_nested_width += $min_len[$col];
2448: $max_nested_width += $max_len[$col];
2449:
2450: }
2451: # Fudge in an extra 5 mm for borders etc:
2452:
2453: $min_nested_width += 5;
2454: $max_nested_width += 5;
2455:
2456: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2457: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2458: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2459: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2460: }
2461: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2462: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2463: }
2464:
2465: pop @Apache::londefdef::table;
2466: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2467: } else {
2468: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2469: pop @Apache::londefdef::table;
2470: undef @Apache::londefdef::table;
2471: }
2472: }
2473: return $currentstring;
2474: }
2475:
2476: #-- <tr> tag (end tag optional)
2477: sub start_tr {
2478: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2479: my $currentstring = '';
2480: if ($target eq 'web' || $target eq 'webgrade') {
2481: $currentstring = $token->[4];
2482: } elsif ($target eq 'tex') {
2483: $Apache::londefdef::table[-1]{'row_number'}++;
2484: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2485: if ($alignchar ne '') {
2486: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2487: } else {
2488: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2489: }
2490: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2491: #
2492: # Need to save the number of table columns to preserve the max # columns.
2493: #
2494: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2495: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2496: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2497: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2498: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2499: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2500: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2501: }
2502: return $currentstring;
2503: }
2504:
2505: sub end_tr {
2506: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2507: my $currentstring = &end_p(); # Close any pending <p> in the row.
2508: if ($target eq 'web' || $target eq 'webgrade') {
2509: $currentstring .= $token->[2];
2510: } elsif ($target eq 'tex') {
2511: if ($Apache::londefdef::TD_redirection) {
2512: &end_td_tex($parstack,$parser,$safeeval);
2513: }
2514: # Counter columns must be the maximum number of columns seen
2515: # in the table so far so:
2516: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2517: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2518: }
2519:
2520:
2521:
2522: }
2523: return $currentstring;
2524: }
2525:
2526: #-- <td> tag (end tag optional)
2527: sub start_td {
2528: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2529: my $currentstring = '';
2530: if ($target eq 'web' || $target eq 'webgrade') {
2531: $currentstring = $token->[4];
2532: } elsif ($target eq 'tex') {
2533: $Apache::londefdef::TD_redirection = 1;
2534: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2535: }
2536: return $currentstring;
2537: }
2538:
2539: sub tag_check {
2540: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2541: my @ar=@$parstack;
2542: for (my $i=$#ar-1;$i>=0;$i--) {
2543: if (lc($$tagstack[$i]) eq $good_tag) {
2544: &start_td_tex($parstack,$parser,$safeeval);
2545: last;
2546: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2547: splice @ar, $i+1;
2548: &end_td_tex(\@ar,$parser,$safeeval);
2549: &start_td_tex($parstack,$parser,$safeeval);
2550: last;
2551: }
2552: }
2553: return '';
2554: }
2555:
2556: sub start_td_tex {
2557: my ($parstack,$parser,$safeeval) = @_;
2558: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2559: if ($alignchar eq '') {
2560: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2561: }
2562: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2563: $Apache::londefdef::table[-1]{'counter_columns'}++;
2564: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2565: if (defined $TeXwidth) {
2566: my $current_length=&recalc($TeXwidth);
2567: $current_length=~/(\d+\.?\d*)/;
2568: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2569: }
2570: &Apache::lonxml::startredirection();
2571: return '';
2572: }
2573:
2574: sub end_td_tex {
2575: my ($parstack,$parser,$safeeval) = @_;
2576: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2577: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2578: my $data = &Apache::lonxml::endredirection();
2579:
2580: # The rowspan array of the table indicates which cells are part of a span.
2581: # n indicates the start of a span set of n rows.
2582: # ^ indicates a cell that continues a span set.
2583: # _ indicates the cell is at the bottom of a span set.
2584: # If this and subsequent cells are part of a rowspan, we must
2585: # push along the row until we find one that is not.
2586:
2587: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2588: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2589: # Part of a span.
2590: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2591: $current_column++;
2592: }
2593: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2594:
2595:
2596: # Get the column and row spans.
2597: # Colspan can be done via \multicolumn if I can figure out the data structs.
2598:
2599: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2600: if (!$colspan) {
2601: $colspan = 1;
2602: }
2603:
2604: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2605: if (!$rowspan) {
2606: $rowspan = 1;
2607: }
2608:
2609:
2610:
2611: for (my $c = 0; $c < $colspan; $c++) {
2612: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2613: for (my $i = 1; $i < $rowspan; $i++) {
2614: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2615: if ($i == ($rowspan-1)) {
2616: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2617: }
2618: }
2619: }
2620:
2621: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2622: if (defined $TeXwidth) {
2623: for (my $c = 0; $c < $colspan; $c++) {
2624: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2625: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2626: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2627: }
2628: } else {
2629: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2630: my $garbage_data=$data;
2631: my $fwidth=0;
2632: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2633: my $current_length=&recalc($1);
2634: $current_length=~/(\d+\.?\d*)/;
2635: if ($fwidth<$1) {$fwidth=$1;}
2636: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2637: }
2638: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2639: my $current_length=$1;
2640: if ($fwidth<$current_length) {$fwidth=$current_length;}
2641: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2642: }
2643: for (my $c = 0; $c < $colspan; $c++) {
2644: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2645: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2646: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2647: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2648: }
2649: } 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)*/) {
2650: my $garbage_data=$data;
2651: my $fwidth=0;
2652: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2653: my $current_length=&recalc($1);
2654: $current_length=~/(\d+\.?\d*)/;
2655: if ($fwidth<$1) {$fwidth=$1;}
2656: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2657: }
2658: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2659: my $current_length=&recalc($1);
2660: $current_length=~/(\d+\.?\d*)/;
2661: if ($fwidth<$1) {$fwidth=$1;}
2662: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2663: }
2664: for (my $c = 0; $c < $colspan; $c++) {
2665: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2666: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2667: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2668: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2669: }
2670: $data=~s/\\\\\s*$//;
2671: } else {
2672: $data=~s/^\s+(\S.*)/$1/;
2673: $data=~s/(.*\S)\s+$/$1/;
2674: $data=~s/(\s)+/$1/;
2675: my ($current_length,$min_length)=(0,0);
2676: if ($data=~/\\vskip/) {
2677: my $newdata=$data;
2678: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2679: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2680: foreach my $elementdata (@newdata) {
2681: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2682: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2683: my @words=split(/ /,$elementdata);
2684: foreach my $word (@words) {
2685: my $lengthword=2.5*&LATEX_length($word);
2686: if ($min_length<$lengthword) {$min_length=$lengthword;}
2687: }
2688: }
2689: } else {
2690: $current_length=2.5*&LATEX_length($data);
2691: my @words=split(/ /,$data);
2692: foreach my $word (@words) {
2693: my $lengthword=2*&LATEX_length($word);
2694: if ($min_length<$lengthword) {$min_length=$lengthword;}
2695: }
2696: }
2697: for (my $c = 0; $c < $colspan; $c++) {
2698: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2699: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2700: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2701: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2702: }
2703: }
2704: }
2705: # Substitute all of the tables nested in this cell in their appropriate places.
2706:
2707:
2708: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2709: for (my $in=0; $in<=$nested_count; $in++) {
2710: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2711: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2712: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2713: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2714:
2715: }
2716: # Should be be killing off the 'include' elements as they're used up?
2717:
2718: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2719:
2720:
2721:
2722:
2723: # the colspan array will indicate how many columns will be spanned by this
2724: # cell..this requires that counter_columns also be adjusted accordingly
2725: # so that the next bunch of text goes in the right cell. Note that since
2726: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2727: #
2728:
2729: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2730: for (my $i = 0; $i < ($colspan -1); $i++) {
2731: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2732: }
2733: for (my $r = 0; $r < $rowspan; $r++) {
2734: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2735: # Put empty text in spanned cols.
2736:
2737: }
2738:
2739:
2740:
2741: return '';
2742: }
2743:
2744: sub end_td {
2745: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2746: my $currentstring = '';
2747: if ($target eq 'web' || $target eq 'webgrade') {
2748: $currentstring = $token->[2];
2749: } elsif ($target eq 'tex') {
2750: $Apache::londefdef::TD_redirection =0;
2751: &end_td_tex($parstack,$parser,$safeeval);
2752: }
2753: return $currentstring;
2754: }
2755:
2756: #-- <th> tag (end tag optional)
2757: sub start_th {
2758: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2759: my $currentstring = '';
2760: if ($target eq 'web' || $target eq 'webgrade') {
2761: $currentstring = $token->[4];
2762: } elsif ($target eq 'tex') {
2763: $Apache::londefdef::TD_redirection = 1;
2764: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2765: }
2766: return $currentstring;
2767: }
2768:
2769: sub tagg_check {
2770: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2771: my @ar=@$parstack;
2772: for (my $i=$#ar-1;$i>=0;$i--) {
2773: if (lc($$tagstack[$i]) eq $good_tag) {
2774: &start_th_tex($parstack,$parser,$safeeval);
2775: last;
2776: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2777: splice @ar, $i+1;
2778: &end_th_tex(\@ar,$parser,$safeeval);
2779: &start_th_tex($parstack,$parser,$safeeval);
2780: last;
2781: }
2782: }
2783: return '';
2784: }
2785:
2786: sub start_th_tex {
2787: my ($parstack,$parser,$safeeval) = @_;
2788: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2789: if ($alignchar eq '') {
2790: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2791: }
2792: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2793: $Apache::londefdef::table[-1]{'counter_columns'}++;
2794: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2795: if (defined $TeXwidth) {
2796: my $current_length=&recalc($TeXwidth);
2797: $current_length=~/(\d+\.?\d*)/;
2798: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2799: }
2800: &Apache::lonxml::startredirection();
2801: return '';
2802: }
2803:
2804: sub end_th_tex {
2805: my ($parstack,$parser,$safeeval) = @_;
2806: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2807: my $data=&Apache::lonxml::endredirection();
2808: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2809: if (defined $TeXwidth) {
2810: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2811: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2812: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2813: } else {
2814: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2815: my $garbage_data=$data;
2816: my $fwidth=0;
2817: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2818: my $current_length=&recalc($1);
2819: $current_length=~/(\d+\.?\d*)/;
2820: if ($fwidth<$1) {$fwidth=$1;}
2821: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2822: }
2823: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2824: my $current_length=$1;
2825: if ($fwidth<$current_length) {$fwidth=$current_length;}
2826: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2827: }
2828: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2829: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2830: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2831: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2832: } else {
2833: $data=~s/^\s+(\S.*)/$1/;
2834: $data=~s/(.*\S)\s+$/$1/;
2835: $data=~s/(\s)+/$1/;
2836: my ($current_length,$min_length)=(0,0);
2837: if ($data=~/\\vskip/) {
2838: my $newdata=$data;
2839: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2840: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2841: foreach my $elementdata (@newdata) {
2842: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2843: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2844: my @words=split(/ /,$elementdata);
2845: foreach my $word (@words) {
2846: my $lengthword=2.5*&LATEX_length($word);
2847: if ($min_length<$lengthword) {$min_length=$lengthword;}
2848: }
2849: }
2850: } else {
2851: $current_length=2.5*&LATEX_length($data);
2852: my @words=split(/ /,$data);
2853: foreach my $word (@words) {
2854: my $lengthword=2*&LATEX_length($word);
2855: if ($min_length<$lengthword) {$min_length=$lengthword;}
2856: }
2857: }
2858: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2859: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2860: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2861: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2862: }
2863: }
2864: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2865: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2866: }
2867: #make data bold
2868: $data='\textbf{'.$data.'}';
2869: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2870: return'';
2871: }
2872:
2873: sub end_th {
2874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2875: my $currentstring = &end_p(); # Close any open <p> in the row.
2876: if ($target eq 'web' || $target eq 'webgrade') {
2877: $currentstring .= $token->[2];
2878: } elsif ($target eq 'tex') {
2879: $Apache::londefdef::TD_redirection =0;
2880: &end_th_tex($parstack,$parser,$safeeval);
2881: }
2882: return $currentstring;
2883: }
2884:
2885: #-- <img> tag (end tag forbidden)
2886: #
2887: # Render the <IMG> tag.
2888: # <IMG> has the following attributes (in addition to the
2889: # standard HTML ones:
2890: # TeXwrap - Governs how the tex target will try to wrap text around
2891: # horizontally aligned images.
2892: # TeXwidth - The width of the image when rendered for print (mm).
2893: # TeXheight - The height of the image when rendered for print (mm)
2894: # (Note there seems to also be support for this as a % of page size)
2895: #
2896: sub start_img {
2897: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2898: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2899: undef,1);
2900: if (! $src &&
2901: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2902: ) {
2903: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2904: return '';
2905: }
2906: &Apache::lonxml::extlink($src);
2907: my $currentstring = '';
2908: my $scaling = .3;
2909:
2910: # Render unto browsers that which are the browser's...
2911:
2912: if ($target eq 'web' || $target eq 'webgrade') {
2913: if ($env{'browser.imagesuppress'} ne 'on') {
2914: my $enc = ('yes' eq
2915: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2916: $safeeval)));
2917: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2918: $enc);
2919: } else {
2920: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2921: undef,1);
2922: if (!$alttag) {
2923: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2924: $src);
2925: }
2926: $currentstring.='[IMAGE: '.$alttag.']';
2927: }
2928:
2929: # and render unto TeX that which is LaTeX
2930:
2931: } elsif ($target eq 'tex') {
2932: #
2933: # The alignment will require some superstructure to be put around
2934: # the \includegraphics stuff. At present we can only partially
2935: # simulate the alignments offered by html.
2936: #
2937: #
2938: my $align = lc(&Apache::lonxml::get_param('align',
2939: $parstack,
2940: $safeeval,
2941: undef,1));
2942: if(!$align) {
2943: $align = "bottom"; # This is html's default so it's ours too.
2944: }
2945: #
2946: &Apache::lonxml::debug("Alignemnt = $align");
2947: # LaTeX's image/text wrapping is really bad since it wants to
2948: # make figures float.
2949: # The user has the optional parameter (applicable only to l/r
2950: # alignment to use the picins/parpic directive to get wrapped text
2951: # this is also imperfect.. that's why we give them a choice...
2952: # so they can't yell at us for our choice.
2953: #
2954: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2955: $parstack,
2956: $safeeval,
2957: undef,0);
2958: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2959: if(!$latex_rendering) {
2960: $latex_rendering = "texwrap";
2961: }
2962: # using texwrap inside a table does not work. So, if after all of this,
2963: # texwrap is on, we turn it off if we detect we're in a table:
2964: #
2965: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2966: $latex_rendering = 'parpic';
2967: }
2968:
2969: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2970:
2971: #if original gif/jpg/png file exist do following:
2972: my $origsrc=$src;
2973: my ($path,$file) = &get_eps_image($src);
2974: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2975: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2976: &Apache::lonxml::debug("path = $path file = $file src = $src");
2977: if (-e $src) {
2978: &Apache::lonxml::debug("$src exists");
2979: my ($height_param,$width_param)=
2980: &image_size($origsrc,0.3,$parstack,$safeeval);
2981: my $size;
2982: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2983: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2984: # Default size if not able to extract that (e.g. eps image).
2985:
2986: # &Apache::lonnet::logthis("Size = $size");
2987:
2988: $size='['.$size;
2989: $size=~s/,$/]/;
2990: $currentstring .= '\graphicspath{{'.$path.'}}'
2991: .'\includegraphics'.$size.'{'.$file.'} ';
2992: my $closure;
2993: ($currentstring, $closure) = &align_latex_image($align,
2994: $latex_rendering,
2995: $currentstring,
2996: $width_param,
2997: $height_param);
2998: $currentstring .= $closure;
2999:
3000: } else {
3001: &Apache::lonxml::debug("$src does not exist");
3002: #original image file doesn't exist so check the alt attribute
3003: my $alt =
3004: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
3005: unless ($alt) {
3006: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3007: }
3008:
3009: if ($alt) { $currentstring .= ' '.$alt.' '; }
3010: }
3011:
3012: # And here's where the semi-quote breaks down: allow the user
3013: # to edit the beast as well by rendering the problem for edit:
3014: } elsif ($target eq 'edit') {
3015: my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
3016: $currentstring .=&Apache::edit::tag_start($target,$token);
3017: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
3018: &Apache::edit::browse('src',undef,'alt',$only).' '.
3019: &Apache::edit::search('src',undef,'alt').'<br />';
3020: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
3021: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
3022: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
3023: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
3024: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
3025: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
3026: ['','bottom','middle','top','left','right'],$token,5);
3027: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
3028: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
3029: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
3030: ['no','yes'], $token, 2);
3031: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
3032: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
3033: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
3034: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
3035: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
3036:
3037:
3038: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
3039: if ($width) { $currentstring.=' width="'.$width.'" '; }
3040: if ($height) { $currentstring.=' height="'.$height.'" '; }
3041: $currentstring .= ' />';
3042: } elsif ($target eq 'modified') {
3043: my ($osrc,$owidth,$oheight)=
3044: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3045: my $ctag=&Apache::edit::get_new_args($token,$parstack,
3046: $safeeval,'src','alt','align',
3047: 'TeXwidth','TeXheight', 'TeXwrap',
3048: 'width','height','encrypturl');
3049: my ($nsrc,$nwidth,$nheight)=
3050: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3051: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
3052: &image_replication($loc);
3053: my ($iwidth,$iheight);
3054: if (-e $loc) {
3055: my $image = Image::Magick->new;
3056: $image->Read($loc);
3057: ($iwidth, $iheight) = ($image->Get('width'),
3058: $image->Get('height'));
3059: }
3060: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
3061: # changed image or no size specified,
3062: # if they didn't explicitly change the
3063: # width or height use the ones from the image
3064: if ($iwidth && $iheight) {
3065: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
3066: $token->[2]{'width'} = $iwidth;$ctag=1;
3067: }
3068: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
3069: $token->[2]{'height'}=$iheight;$ctag=1;
3070: }
3071: }
3072: }
3073: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
3074: # if we don't have a width or height
3075: if ($iwidth && $cwidth && !$cheight) {
3076: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
3077: }
3078: if ($iheight && $cheight && !$cwidth) {
3079: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
3080: }
3081: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3082: }
3083:
3084: return $currentstring;
3085: }
3086:
3087: sub end_img {
3088: my ($target,$token) = @_;
3089: my $currentstring = '';
3090: if ($target eq 'web' || $target eq 'webgrade') {
3091: $currentstring = $token->[2];
3092: } elsif ($target eq 'tex') {
3093: $currentstring = '';
3094: }
3095: return $currentstring;
3096: }
3097:
3098: #-- <applet> tag (end tag required)
3099: sub start_applet {
3100: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3101:
3102: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3103: &Apache::lonxml::extlink($code);
3104: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3105: undef,1);
3106: &Apache::lonxml::extlink($archive);
3107: my $currentstring = '';
3108: if ($target eq 'web' || $target eq 'webgrade') {
3109: if ($env{'browser.appletsuppress'} ne 'on') {
3110: $currentstring = &Apache::lonenc::encrypt_ref($token,
3111: {'code'=>$code,
3112: 'archive'=>$archive}
3113: );
3114: } else {
3115: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3116: $safeeval,undef,1);
3117: unless ($alttag) {
3118: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3119: $code);
3120: }
3121: $currentstring='[APPLET: '.$alttag.']';
3122: }
3123: } elsif ($target eq 'tex') {
3124: # Turn off some stuff we can't be inside thank you LaTeX
3125:
3126:
3127: my $restart_sub = 0;
3128: my $restart_sup = 0;
3129:
3130: # Since <sub> and <sup> are simple tags it's ok to turn off/on
3131: # using the start_ stop_ functions.. those tags only care about
3132: # $target.
3133:
3134: if (&is_inside_of($tagstack, "sub")) {
3135: $restart_sub = 1;
3136: $currentstring .= &end_sub($target, $token, $tagstack,
3137: $parstack, $parser, $safeeval);
3138: }
3139: if (&is_inside_of($tagstack, "sup")) {
3140: $restart_sup = 1;
3141: $currentstring .= &end_sup($target, $token, $tagstack,
3142: $parstack, $parser, $safeeval);
3143: }
3144:
3145: # Now process the applet; just replace it with its alt attribute.
3146:
3147: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3148: $safeeval,undef,1);
3149: unless ($alttag) {
3150: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3151: undef,1);
3152: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3153: $code);
3154: }
3155: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3156: '.}\end{center}';
3157:
3158: # Turn stuff back on that we can't be inside of.
3159:
3160: if ($restart_sub) {
3161: $currentstring .= &start_sub($target, $token, $tagstack,
3162: $parstack, $parser, $safeeval);
3163: }
3164: if ($restart_sup) {
3165: $currentstring .= &start_sup($target, $token, $tagstack,
3166: $parstack, $parser, $safeeval);
3167: }
3168: }
3169: return $currentstring;
3170: }
3171:
3172: sub end_applet {
3173: my ($target,$token) = @_;
3174: my $currentstring = '';
3175: if ($target eq 'web' || $target eq 'webgrade') {
3176: $currentstring = $token->[2];
3177: } elsif ($target eq 'tex') {
3178: }
3179: return $currentstring;
3180: }
3181:
3182: #-- <embed> tag (end tag optional/required)
3183: sub start_embed {
3184: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3185: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3186: &Apache::lonxml::extlink($src);
3187: my $currentstring = '';
3188: if ($target eq 'web' || $target eq 'webgrade') {
3189: if ($env{'browser.embedsuppress'} ne 'on') {
3190: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3191: } else {
3192: my $alttag=&Apache::lonxml::get_param
3193: ('alt',$parstack,$safeeval,undef,1);
3194: unless ($alttag) {
3195: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3196: }
3197: $currentstring='[EMBED: '.$alttag.']';
3198: }
3199: } elsif ($target eq 'tex') {
3200: }
3201: return $currentstring;
3202: }
3203:
3204: sub end_embed {
3205: my ($target,$token) = @_;
3206: my $currentstring = '';
3207: if ($target eq 'web' || $target eq 'webgrade') {
3208: $currentstring = $token->[2];
3209: } elsif ($target eq 'tex') {
3210: }
3211: return $currentstring;
3212: }
3213:
3214: #-- <param> tag (end tag forbidden)
3215: sub start_param {
3216: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3217: if (&Apache::lonxml::get_param('name',$parstack,
3218: $safeeval,undef,1)=~/^cabbase$/i) {
3219: my $value=&Apache::lonxml::get_param('value',$parstack,
3220: $safeeval,undef,1);
3221: &Apache::lonxml::extlink($value);
3222: }
3223:
3224: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3225: &Apache::lonxml::extlink($src);
3226: my $currentstring = '';
3227: if ($target eq 'web' || $target eq 'webgrade') {
3228: my %toconvert;
3229: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3230: if ($src) { $toconvert{'src'}= $src; }
3231: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3232: undef,1);
3233: if ($name=~/^cabbase$/i) {
3234: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3235: $safeeval,undef,1);
3236: }
3237: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3238: } elsif ($target eq 'tex') {
3239: }
3240: return $currentstring;
3241: }
3242:
3243: sub end_param {
3244: my ($target,$token) = @_;
3245: my $currentstring = '';
3246: if ($target eq 'web' || $target eq 'webgrade') {
3247: $currentstring = $token->[2];
3248: } elsif ($target eq 'tex') {
3249: }
3250: return $currentstring;
3251: }
3252:
3253: #-- <allow> tag
3254: sub start_allow {
3255: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3256: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3257: &Apache::lonxml::extlink($src);
3258:
3259: if ($target eq 'tex') { &image_replication($src); }
3260: my $result;
3261: if ($target eq 'edit') {
3262: $result .=&Apache::edit::tag_start($target,$token);
3263: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3264: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3265: } elsif ($target eq 'modified') {
3266: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3267: $safeeval,'src');
3268: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3269: }
3270: return $result;
3271: }
3272:
3273: sub end_allow {
3274: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3275: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3276: return '';
3277: }
3278:
3279: #-- Frames (end tag required)
3280: #-- <frameset>
3281: sub start_frameset {
3282: my ($target,$token) = @_;
3283: my $currentstring = ''; # Close any pending para.
3284: if ($target eq 'web' || $target eq 'webgrade') {
3285: $currentstring =
3286: &Apache::loncommon::start_page($Apache::londefdef::title,
3287: $Apache::londefdef::head,
3288: {'add_entries' => $token->[2],
3289: 'no_title' => 1,
3290: 'force_register' => 1,
3291: 'frameset' => 1,});
3292:
3293: }
3294: return $currentstring;
3295: }
3296:
3297: sub end_frameset {
3298: my ($target,$token) = @_;
3299: my $currentstring = '';
3300: if ($target eq 'web' || $target eq 'webgrade') {
3301: $currentstring = $token->[2];
3302: }
3303: return $currentstring;
3304: }
3305:
3306: #-- <xmp> (end tag required)
3307: sub start_xmp {
3308: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3309: my $currentstring = '';
3310: if ($target eq 'web' || $target eq 'webgrade') {
3311: $currentstring .= $token->[4];
3312: } elsif ($target eq 'tex') {
3313: $currentstring .= '\begin{verbatim}';
3314: }
3315: return $currentstring;
3316: }
3317:
3318: sub end_xmp {
3319: my ($target,$token) = @_;
3320: my $currentstring = '';
3321: if ($target eq 'web' || $target eq 'webgrade') {
3322: $currentstring .= $token->[2];
3323: } elsif ($target eq 'tex') {
3324: $currentstring .= '\end{verbatim}';
3325: }
3326: return $currentstring;
3327: }
3328:
3329: #-- <pre> (end tag required)
3330: sub start_pre {
3331: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3332: my $currentstring = &end_p(); # close off pending <p>
3333: if ($target eq 'web' || $target eq 'webgrade') {
3334: $currentstring .= $token->[4];
3335: } elsif ($target eq 'tex') {
3336: $currentstring .= '\begin{verbatim}';
3337: &Apache::lonxml::disable_LaTeX_substitutions();
3338: }
3339: return $currentstring;
3340: }
3341:
3342: sub end_pre {
3343: my ($target,$token) = @_;
3344: my $currentstring = '';
3345: if ($target eq 'web' || $target eq 'webgrade') {
3346: $currentstring .= $token->[2];
3347: } elsif ($target eq 'tex') {
3348: $currentstring .= '\end{verbatim}';
3349: &Apache::lonxml::enable_LaTeX_substitutions();
3350: }
3351: return $currentstring;
3352: }
3353:
3354: #-- <insert>
3355: sub start_insert {
3356: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3357: my $currentstring = '';
3358: if ($target eq 'web' || $target eq 'webgrade') {
3359: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3360: $currentstring .= '<b>'.$display.'</b>';;
3361: }
3362: return $currentstring;
3363: }
3364:
3365: sub end_insert {
3366: my ($target,$token) = @_;
3367: my $currentstring = '';
3368: if ($target eq 'web' || $target eq 'webgrade') {
3369: $currentstring .= '';
3370: }
3371: return $currentstring;
3372: }
3373:
3374: #-- <externallink>
3375: sub start_externallink {
3376: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3377: my $currentstring = '';
3378: if ($target eq 'web' || $target eq 'webgrade') {
3379: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3380: $currentstring .= '<b>'.$display.'</b>';;
3381: }
3382: return $currentstring;
3383: }
3384:
3385: sub end_externallink {
3386: my ($target,$token) = @_;
3387: my $currentstring = '';
3388: if ($target eq 'web' || $target eq 'webgrade') {
3389: $currentstring .= '';
3390: }
3391: return $currentstring;
3392: }
3393:
3394: #-- <blankspace heigth="">
3395: sub start_blankspace {
3396: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3397: my $currentstring = &end_p(); # closes off any unclosed <p>
3398: if ($target eq 'tex') {
3399: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3400: $currentstring .= '\vskip '.$howmuch.' ';
3401: }
3402: return $currentstring;
3403: }
3404:
3405: sub end_blankspace {
3406: my ($target,$token) = @_;
3407: my $currentstring = '';
3408: if ($target eq 'tex') {
3409: $currentstring .= '';
3410: }
3411: return $currentstring;
3412: }
3413:
3414: #-- <abbr> tag (end tag required)
3415: sub start_abbr {
3416: my ($target,$token) = @_;
3417: my $currentstring = '';
3418: if ($target eq 'web' || $target eq 'webgrade') {
3419: $currentstring = $token->[4];
3420: }
3421: return $currentstring;
3422: }
3423:
3424: sub end_abbr {
3425: my ($target,$token) = @_;
3426: my $currentstring = '';
3427: if ($target eq 'web' || $target eq 'webgrade') {
3428: $currentstring = $token->[2];
3429: }
3430: return $currentstring;
3431: }
3432:
3433: #-- <acronym> tag (end tag required)
3434: sub start_acronym {
3435: my ($target,$token) = @_;
3436: my $currentstring = '';
3437: if ($target eq 'web' || $target eq 'webgrade') {
3438: $currentstring = $token->[4];
3439: }
3440: return $currentstring;
3441: }
3442:
3443: sub end_acronym {
3444: my ($target,$token) = @_;
3445: my $currentstring = '';
3446: if ($target eq 'web' || $target eq 'webgrade') {
3447: $currentstring = $token->[2];
3448: }
3449: return $currentstring;
3450: }
3451:
3452: #-- <area> tag (end tag forbidden)
3453: sub start_area {
3454: my ($target,$token) = @_;
3455: my $currentstring = '';
3456: if ($target eq 'web' || $target eq 'webgrade') {
3457: $currentstring = $token->[4];
3458: }
3459: return $currentstring;
3460: }
3461:
3462: sub end_area {
3463: my ($target,$token) = @_;
3464: my $currentstring = '';
3465: if ($target eq 'web' || $target eq 'webgrade') {
3466: $currentstring = $token->[2];
3467: }
3468: return $currentstring;
3469: }
3470:
3471: #-- <base> tag (end tag forbidden)
3472: sub start_base {
3473: my ($target,$token) = @_;
3474: my $currentstring = '';
3475: if ($target eq 'web' || $target eq 'webgrade') {
3476: $currentstring = $token->[4];
3477: }
3478: return $currentstring;
3479: }
3480:
3481: sub end_base {
3482: my ($target,$token) = @_;
3483: my $currentstring = '';
3484: if ($target eq 'web' || $target eq 'webgrade') {
3485: $currentstring = $token->[2];
3486: }
3487: return $currentstring;
3488: }
3489:
3490: #-- <bdo> tag (end tag required)
3491: sub start_bdo {
3492: my ($target,$token) = @_;
3493: my $currentstring = '';
3494: if ($target eq 'web' || $target eq 'webgrade') {
3495: $currentstring = $token->[4];
3496: }
3497: return $currentstring;
3498: }
3499:
3500: sub end_bdo {
3501: my ($target,$token) = @_;
3502: my $currentstring = '';
3503: if ($target eq 'web' || $target eq 'webgrade') {
3504: $currentstring = $token->[2];
3505: }
3506: return $currentstring;
3507: }
3508:
3509: #-- <bgsound> tag (end tag optional)
3510: sub start_bgsound {
3511: my ($target,$token) = @_;
3512: my $currentstring = '';
3513: if ($target eq 'web' || $target eq 'webgrade') {
3514: $currentstring = $token->[4];
3515: }
3516: return $currentstring;
3517: }
3518:
3519: sub end_bgsound {
3520: my ($target,$token) = @_;
3521: my $currentstring = '';
3522: if ($target eq 'web' || $target eq 'webgrade') {
3523: $currentstring = $token->[2];
3524: }
3525: return $currentstring;
3526: }
3527:
3528: #-- <blink> tag (end tag required)
3529: sub start_blink {
3530: my ($target,$token) = @_;
3531: my $currentstring = '';
3532: if ($target eq 'web' || $target eq 'webgrade') {
3533: $currentstring = $token->[4];
3534: }
3535: return $currentstring;
3536: }
3537:
3538: sub end_blink {
3539: my ($target,$token) = @_;
3540: my $currentstring = '';
3541: if ($target eq 'web' || $target eq 'webgrade') {
3542: $currentstring = $token->[2];
3543: }
3544: return $currentstring;
3545: }
3546:
3547: #-- <blockquote> tag (end tag required)
3548: sub start_blockquote {
3549: my ($target,$token) = @_;
3550: my $currentstring = &end_p(); # Close any unclosed <p>
3551: if ($target eq 'web' || $target eq 'webgrade') {
3552: $currentstring .= $token->[4];
3553: }
3554: if ($target eq 'tex') {
3555: $currentstring .= '\begin{quote}';
3556: }
3557: return $currentstring;
3558: }
3559:
3560: sub end_blockquote {
3561: my ($target,$token) = @_;
3562: my $currentstring = '';
3563: if ($target eq 'web' || $target eq 'webgrade') {
3564: $currentstring = $token->[2];
3565: }
3566: if ($target eq 'tex') {
3567: $currentstring = '\end{quote}';
3568: }
3569: return $currentstring;
3570: }
3571:
3572: #-- <button> tag (end tag required)
3573: sub start_button {
3574: my ($target,$token) = @_;
3575: my $currentstring = '';
3576: if ($target eq 'web' || $target eq 'webgrade') {
3577: $currentstring = $token->[4];
3578: }
3579: return $currentstring;
3580: }
3581:
3582: sub end_button {
3583: my ($target,$token) = @_;
3584: my $currentstring = '';
3585: if ($target eq 'web' || $target eq 'webgrade') {
3586: $currentstring = $token->[2];
3587: }
3588: return $currentstring;
3589: }
3590:
3591: #-- <caption> tag (end tag required)
3592: sub start_caption {
3593: my ($target,$token) = @_;
3594: my $currentstring = '';
3595: if ($target eq 'web' || $target eq 'webgrade') {
3596: $currentstring = $token->[4];
3597: }
3598: return $currentstring;
3599: }
3600:
3601: sub end_caption {
3602: my ($target,$token) = @_;
3603: my $currentstring = '';
3604: if ($target eq 'web' || $target eq 'webgrade') {
3605: $currentstring = $token->[2];
3606: }
3607: return $currentstring;
3608: }
3609:
3610: #-- <col> tag (end tag forbdden)
3611: sub start_col {
3612: my ($target,$token) = @_;
3613: my $currentstring = '';
3614: if ($target eq 'web' || $target eq 'webgrade') {
3615: $currentstring = $token->[4];
3616: }
3617: return $currentstring;
3618: }
3619:
3620: sub end_col {
3621: my ($target,$token) = @_;
3622: my $currentstring = '';
3623: if ($target eq 'web' || $target eq 'webgrade') {
3624: $currentstring = $token->[2];
3625: }
3626: return $currentstring;
3627: }
3628:
3629: #-- <colgroup> tag (end tag optional)
3630: sub start_colgroup {
3631: my ($target,$token) = @_;
3632: my $currentstring = '';
3633: if ($target eq 'web' || $target eq 'webgrade') {
3634: $currentstring = $token->[4];
3635: }
3636: return $currentstring;
3637: }
3638:
3639: sub end_colgroup {
3640: my ($target,$token) = @_;
3641: my $currentstring = '';
3642: if ($target eq 'web' || $target eq 'webgrade') {
3643: $currentstring = $token->[2];
3644: }
3645: return $currentstring;
3646: }
3647:
3648: #-- <del> tag (end tag required)
3649: sub start_del {
3650: my ($target,$token) = @_;
3651: my $currentstring = '';
3652: if ($target eq 'web' || $target eq 'webgrade') {
3653: $currentstring = $token->[4];
3654: }
3655: return $currentstring;
3656: }
3657:
3658: sub end_del {
3659: my ($target,$token) = @_;
3660: my $currentstring = '';
3661: if ($target eq 'web' || $target eq 'webgrade') {
3662: $currentstring = $token->[2];
3663: }
3664: return $currentstring;
3665: }
3666:
3667: #-- <fieldset> tag (end tag required)
3668: sub start_fieldset {
3669: my ($target,$token) = @_;
3670: my $currentstring = '';
3671: if ($target eq 'web' || $target eq 'webgrade') {
3672: $currentstring = $token->[4];
3673: }
3674: return $currentstring;
3675: }
3676:
3677: sub end_fieldset {
3678: my ($target,$token) = @_;
3679: my $currentstring = '';
3680: if ($target eq 'web' || $target eq 'webgrade') {
3681: $currentstring = $token->[2];
3682: }
3683: return $currentstring;
3684: }
3685:
3686: #-- <frame> tag (end tag forbidden)
3687: sub start_frame {
3688: my ($target,$token) = @_;
3689: my $currentstring = '';
3690: if ($target eq 'web' || $target eq 'webgrade') {
3691: $currentstring = $token->[4];
3692: }
3693: return $currentstring;
3694: }
3695:
3696: sub end_frame {
3697: my ($target,$token) = @_;
3698: my $currentstring = '';
3699: if ($target eq 'web' || $target eq 'webgrade') {
3700: $currentstring = $token->[2];
3701: }
3702: return $currentstring;
3703: }
3704:
3705: #-- <iframe> tag (end tag required)
3706: sub start_iframe {
3707: my ($target,$token) = @_;
3708: my $currentstring = '';
3709: if ($target eq 'web' || $target eq 'webgrade') {
3710: $currentstring = $token->[4];
3711: }
3712: return $currentstring;
3713: }
3714:
3715: sub end_iframe {
3716: my ($target,$token) = @_;
3717: my $currentstring = '';
3718: if ($target eq 'web' || $target eq 'webgrade') {
3719: $currentstring = $token->[2];
3720: }
3721: return $currentstring;
3722: }
3723:
3724: #-- <ins> tag (end tag required)
3725: sub start_ins {
3726: my ($target,$token) = @_;
3727: my $currentstring = '';
3728: if ($target eq 'web' || $target eq 'webgrade') {
3729: $currentstring = $token->[4];
3730: }
3731: return $currentstring;
3732: }
3733:
3734: sub end_ins {
3735: my ($target,$token) = @_;
3736: my $currentstring = '';
3737: if ($target eq 'web' || $target eq 'webgrade') {
3738: $currentstring = $token->[2];
3739: }
3740: return $currentstring;
3741: }
3742:
3743: #-- <isindex> tag (end tag forbidden)
3744: sub start_isindex {
3745: my ($target,$token) = @_;
3746: my $currentstring = '';
3747: if ($target eq 'web' || $target eq 'webgrade') {
3748: $currentstring = $token->[4];
3749: }
3750: return $currentstring;
3751: }
3752:
3753: sub end_isindex {
3754: my ($target,$token) = @_;
3755: my $currentstring = '';
3756: if ($target eq 'web' || $target eq 'webgrade') {
3757: $currentstring = $token->[2];
3758: }
3759: return $currentstring;
3760: }
3761:
3762: #-- <keygen> tag (end tag forbidden)
3763: sub start_keygen {
3764: my ($target,$token) = @_;
3765: my $currentstring = '';
3766: if ($target eq 'web' || $target eq 'webgrade') {
3767: $currentstring = $token->[4];
3768: }
3769: return $currentstring;
3770: }
3771:
3772: sub end_keygen {
3773: my ($target,$token) = @_;
3774: my $currentstring = '';
3775: if ($target eq 'web' || $target eq 'webgrade') {
3776: $currentstring = $token->[2];
3777: }
3778: return $currentstring;
3779: }
3780:
3781: #-- <label> tag
3782: sub start_label {
3783: my ($target,$token) = @_;
3784: my $currentstring = '';
3785: if ($target eq 'web' || $target eq 'webgrade') {
3786: $currentstring = $token->[4];
3787: }
3788: return $currentstring;
3789: }
3790:
3791: sub end_label {
3792: my ($target,$token) = @_;
3793: my $currentstring = '';
3794: if ($target eq 'web' || $target eq 'webgrade') {
3795: $currentstring = $token->[2];
3796: }
3797: return $currentstring;
3798: }
3799:
3800: #-- <layer> tag (end tag required)
3801: sub start_layer {
3802: my ($target,$token) = @_;
3803: my $currentstring = '';
3804: if ($target eq 'web' || $target eq 'webgrade') {
3805: $currentstring = $token->[4];
3806: }
3807: return $currentstring;
3808: }
3809:
3810: sub end_layer {
3811: my ($target,$token) = @_;
3812: my $currentstring = '';
3813: if ($target eq 'web' || $target eq 'webgrade') {
3814: $currentstring = $token->[2];
3815: }
3816: return $currentstring;
3817: }
3818:
3819: #-- <legend> tag (end tag required)
3820: sub start_legend {
3821: my ($target,$token) = @_;
3822: my $currentstring = '';
3823: if ($target eq 'web' || $target eq 'webgrade') {
3824: $currentstring = $token->[4];
3825: }
3826: return $currentstring;
3827: }
3828:
3829: sub end_legend {
3830: my ($target,$token) = @_;
3831: my $currentstring = '';
3832: if ($target eq 'web' || $target eq 'webgrade') {
3833: $currentstring = $token->[2];
3834: }
3835: return $currentstring;
3836: }
3837:
3838: #-- <link> tag (end tag forbidden)
3839: sub start_link {
3840: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3841: my $currentstring = '';
3842: if ($target eq 'web' || $target eq 'webgrade') {
3843: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3844: undef,1);
3845: &Apache::lonxml::extlink($href);
3846: $currentstring = $token->[4];
3847: }
3848: return $currentstring;
3849: }
3850:
3851: sub end_link {
3852: my ($target,$token) = @_;
3853: my $currentstring = '';
3854: if ($target eq 'web' || $target eq 'webgrade') {
3855: $currentstring = $token->[2];
3856: }
3857: return $currentstring;
3858: }
3859:
3860: #-- <marquee> tag (end tag optional)
3861: sub start_marquee {
3862: my ($target,$token) = @_;
3863: my $currentstring = '';
3864: if ($target eq 'web' || $target eq 'webgrade') {
3865: $currentstring = $token->[4];
3866: }
3867: return $currentstring;
3868: }
3869:
3870: sub end_marquee {
3871: my ($target,$token) = @_;
3872: my $currentstring = '';
3873: if ($target eq 'web' || $target eq 'webgrade') {
3874: $currentstring = $token->[2];
3875: }
3876: return $currentstring;
3877: }
3878:
3879: #-- <multicol> tag (end tag required)
3880: sub start_multicol {
3881: my ($target,$token) = @_;
3882: my $currentstring = &end_p(); # Close any pending <p>
3883: if ($target eq 'web' || $target eq 'webgrade') {
3884: $currentstring .= $token->[4];
3885: }
3886: return $currentstring;
3887: }
3888:
3889: sub end_multicol {
3890: my ($target,$token) = @_;
3891: my $currentstring = '';
3892: if ($target eq 'web' || $target eq 'webgrade') {
3893: $currentstring = $token->[2];
3894: }
3895: return $currentstring;
3896: }
3897:
3898: #-- <nobr> tag (end tag required)
3899: sub start_nobr {
3900: my ($target,$token) = @_;
3901: my $currentstring = '';
3902: if ($target eq 'web' || $target eq 'webgrade') {
3903: $currentstring = $token->[4];
3904: } elsif ($target eq 'tex') {
3905: $currentstring='\mbox{';
3906: }
3907: return $currentstring;
3908: }
3909:
3910: sub end_nobr {
3911: my ($target,$token) = @_;
3912: my $currentstring = '';
3913: if ($target eq 'web' || $target eq 'webgrade') {
3914: $currentstring = $token->[2];
3915: } elsif ($target eq 'tex') {
3916: $currentstring='}';
3917: }
3918: return $currentstring;
3919: }
3920:
3921: #-- <noembed> tag (end tag required)
3922: sub start_noembed {
3923: my ($target,$token) = @_;
3924: my $currentstring = '';
3925: if ($target eq 'web' || $target eq 'webgrade') {
3926: $currentstring = $token->[4];
3927: }
3928: return $currentstring;
3929: }
3930:
3931: sub end_noembed {
3932: my ($target,$token) = @_;
3933: my $currentstring = '';
3934: if ($target eq 'web' || $target eq 'webgrade') {
3935: $currentstring = $token->[2];
3936: }
3937: return $currentstring;
3938: }
3939:
3940: #-- <noframes> tag (end tag required)
3941: sub start_noframes {
3942: my ($target,$token) = @_;
3943: my $currentstring = '';
3944: if ($target eq 'web' || $target eq 'webgrade') {
3945: $currentstring = $token->[4];
3946: }
3947: return $currentstring;
3948: }
3949:
3950: sub end_noframes {
3951: my ($target,$token) = @_;
3952: my $currentstring = '';
3953: if ($target eq 'web' || $target eq 'webgrade') {
3954: $currentstring = $token->[2];
3955: }
3956: return $currentstring;
3957: }
3958:
3959: #-- <nolayer> tag (end tag required)
3960: sub start_nolayer {
3961: my ($target,$token) = @_;
3962: my $currentstring = '';
3963: if ($target eq 'web' || $target eq 'webgrade') {
3964: $currentstring = $token->[4];
3965: }
3966: return $currentstring;
3967: }
3968:
3969: sub end_nolayer {
3970: my ($target,$token) = @_;
3971: my $currentstring = '';
3972: if ($target eq 'web' || $target eq 'webgrade') {
3973: $currentstring = $token->[2];
3974: }
3975: return $currentstring;
3976: }
3977:
3978: #-- <noscript> tag (end tag required)
3979: sub start_noscript {
3980: my ($target,$token) = @_;
3981: my $currentstring = '';
3982: if ($target eq 'web' || $target eq 'webgrade') {
3983: $currentstring = $token->[4];
3984: }
3985: return $currentstring;
3986: }
3987:
3988: sub end_noscript {
3989: my ($target,$token) = @_;
3990: my $currentstring = '';
3991: if ($target eq 'web' || $target eq 'webgrade') {
3992: $currentstring = $token->[2];
3993: }
3994: return $currentstring;
3995: }
3996:
3997: #-- <object> tag (end tag required)
3998: sub start_object {
3999: my ($target,$token) = @_;
4000: my $currentstring = '';
4001: if ($target eq 'web' || $target eq 'webgrade') {
4002: $currentstring = $token->[4];
4003: }
4004: return $currentstring;
4005: }
4006:
4007: sub end_object {
4008: my ($target,$token) = @_;
4009: my $currentstring = '';
4010: if ($target eq 'web' || $target eq 'webgrade') {
4011: $currentstring = $token->[2];
4012: }
4013: return $currentstring;
4014: }
4015:
4016: #-- <optgroup> tag (end tag required)
4017: sub start_optgroup {
4018: my ($target,$token) = @_;
4019: my $currentstring = '';
4020: if ($target eq 'web' || $target eq 'webgrade') {
4021: $currentstring = $token->[4];
4022: }
4023: return $currentstring;
4024: }
4025:
4026: sub end_optgroup {
4027: my ($target,$token) = @_;
4028: my $currentstring = '';
4029: if ($target eq 'web' || $target eq 'webgrade') {
4030: $currentstring = $token->[2];
4031: }
4032: return $currentstring;
4033: }
4034:
4035: #-- <samp> tag (end tag required)
4036: sub start_samp {
4037: my ($target,$token) = @_;
4038: my $currentstring = '';
4039: if ($target eq 'web' || $target eq 'webgrade') {
4040: $currentstring = $token->[4];
4041: } elsif ($target eq 'tex') {
4042: $currentstring='\texttt{';
4043: }
4044: return $currentstring;
4045: }
4046:
4047: sub end_samp {
4048: my ($target,$token) = @_;
4049: my $currentstring = '';
4050: if ($target eq 'web' || $target eq 'webgrade') {
4051: $currentstring = $token->[2];
4052: } elsif ($target eq 'tex') {
4053: $currentstring='}';
4054: }
4055: return $currentstring;
4056: }
4057:
4058: #-- <server> tag
4059: sub start_server {
4060: my ($target,$token) = @_;
4061: my $currentstring = '';
4062: if ($target eq 'web' || $target eq 'webgrade') {
4063: $currentstring = $token->[4];
4064: }
4065: return $currentstring;
4066: }
4067:
4068: sub end_server {
4069: my ($target,$token) = @_;
4070: my $currentstring = '';
4071: if ($target eq 'web' || $target eq 'webgrade') {
4072: $currentstring = $token->[2];
4073: }
4074: return $currentstring;
4075: }
4076:
4077: #-- <spacer> tag (end tag forbidden)
4078: sub start_spacer {
4079: my ($target,$token) = @_;
4080: my $currentstring = &end_p(); # Close off any open <p> tag.
4081: if ($target eq 'web' || $target eq 'webgrade') {
4082: $currentstring .= $token->[4];
4083: }
4084: return $currentstring;
4085: }
4086:
4087: sub end_spacer {
4088: my ($target,$token) = @_;
4089: my $currentstring = '';
4090: if ($target eq 'web' || $target eq 'webgrade') {
4091: $currentstring = $token->[2];
4092: }
4093: return $currentstring;
4094: }
4095:
4096: #-- <span> tag (end tag required)
4097: sub start_span {
4098: my ($target,$token) = @_;
4099: my $currentstring = '';
4100: if ($target eq 'web' || $target eq 'webgrade') {
4101: $currentstring = $token->[4];
4102: }
4103: return $currentstring;
4104: }
4105:
4106: sub end_span {
4107: my ($target,$token) = @_;
4108: my $currentstring = '';
4109: if ($target eq 'web' || $target eq 'webgrade') {
4110: $currentstring = $token->[2];
4111: }
4112: return $currentstring;
4113: }
4114:
4115: #-- <tbody> tag (end tag optional)
4116: sub start_tbody {
4117: my ($target,$token) = @_;
4118: my $currentstring = '';
4119: if ($target eq 'web' || $target eq 'webgrade') {
4120: $currentstring = $token->[4];
4121: }
4122: return $currentstring;
4123: }
4124:
4125: sub end_tbody {
4126: my ($target,$token) = @_;
4127: my $currentstring = '';
4128: if ($target eq 'web' || $target eq 'webgrade') {
4129: $currentstring = $token->[2];
4130: }
4131: return $currentstring;
4132: }
4133:
4134: #-- <tfoot> tag (end tag optional)
4135: sub start_tfoot {
4136: my ($target,$token) = @_;
4137: my $currentstring = '';
4138: if ($target eq 'web' || $target eq 'webgrade') {
4139: $currentstring = $token->[4];
4140: }
4141: return $currentstring;
4142: }
4143:
4144: sub end_tfoot {
4145: my ($target,$token) = @_;
4146: my $currentstring = '';
4147: if ($target eq 'web' || $target eq 'webgrade') {
4148: $currentstring = $token->[2];
4149: }
4150: return $currentstring;
4151: }
4152:
4153: #-- <thead> tag (end tag optional)
4154: sub start_thead {
4155: my ($target,$token) = @_;
4156: my $currentstring = '';
4157: if ($target eq 'web' || $target eq 'webgrade') {
4158: $currentstring = $token->[4];
4159: }
4160: return $currentstring;
4161: }
4162:
4163: sub end_thead {
4164: my ($target,$token) = @_;
4165: my $currentstring = '';
4166: if ($target eq 'web' || $target eq 'webgrade') {
4167: $currentstring = $token->[2];
4168: }
4169: return $currentstring;
4170: }
4171:
4172: #-- <var> tag
4173: sub start_var {
4174: my ($target,$token) = @_;
4175: my $currentstring = '';
4176: if ($target eq 'web' || $target eq 'webgrade') {
4177: $currentstring = $token->[4];
4178: } elsif ($target eq 'tex') {
4179: $currentstring = '\textit{';
4180: }
4181: return $currentstring;
4182: }
4183:
4184: sub end_var {
4185: my ($target,$token) = @_;
4186: my $currentstring = '';
4187: if ($target eq 'web' || $target eq 'webgrade') {
4188: $currentstring = $token->[2];
4189: } elsif ($target eq 'tex') {
4190: $currentstring = '}';
4191: }
4192: return $currentstring;
4193: }
4194:
4195: #-- <wbr> tag (end tag forbidden)
4196: sub start_wbr {
4197: my ($target,$token) = @_;
4198: my $currentstring = '';
4199: if ($target eq 'web' || $target eq 'webgrade') {
4200: $currentstring = $token->[4];
4201: }
4202: return $currentstring;
4203: }
4204:
4205: sub end_wbr {
4206: my ($target,$token) = @_;
4207: my $currentstring = '';
4208: if ($target eq 'web' || $target eq 'webgrade') {
4209: $currentstring = $token->[2];
4210: }
4211: return $currentstring;
4212: }
4213:
4214: #-- <hideweboutput> tag
4215: sub start_hideweboutput {
4216: my ($target,$token) = @_;
4217: if ($target eq 'web' || $target eq 'webgrade') {
4218: &Apache::lonxml::startredirection();
4219: }
4220: return '';
4221: }
4222:
4223: sub end_hideweboutput {
4224: my ($target,$token) = @_;
4225: my $currentstring = '';
4226: if ($target eq 'web' || $target eq 'webgrade') {
4227: $currentstring = &Apache::lonxml::endredirection();
4228: }
4229: return '';
4230: }
4231:
4232:
4233: sub image_replication {
4234: my $src = shift;
4235: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4236: #replicates eps or ps
4237: my $epssrc = my $pssrc = $src;
4238: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4239: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4240: if (not -e $epssrc && not -e $pssrc) {
4241: my $result=&Apache::lonnet::repcopy($epssrc);
4242: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4243: }
4244: return '';
4245: }
4246: #
4247: # Get correct sizing parameter for an image given
4248: # it's initial ht. and wid. This allows sizing of
4249: # images that are generated on-the-fly (e.g. gnuplot)
4250: # as well as serving as a utility for image_size.
4251: #
4252: # Parameter:
4253: # height_param
4254: # width_param - Initial picture dimensions.
4255: # scaling - A scale factor.
4256: # parstack, - the current stack of tag attributes
4257: # from the xml parser
4258: # safeeval, - pointer to the safespace
4259: # depth, - from what level in the stack to look for attributes
4260: # (assumes -1 if unspecified)
4261: # cis - look for attrubutes case insensitively
4262: # (assumes false)
4263: #
4264: # Returns:
4265: # height, width - new dimensions.
4266: #
4267: sub resize_image {
4268: my ($height_param, $width_param, $scaling,
4269: $parstack, $safeeval, $depth, $cis) = @_;
4270:
4271: # First apply the scaling...
4272:
4273: $height_param = $height_param * $scaling;
4274: $width_param = $width_param * $scaling;
4275:
4276: #do we have any specified LaTeX size of the picture?
4277: my $toget='TeXwidth';
4278: if ($cis) {
4279: $toget=lc($toget);
4280: }
4281: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4282: $safeeval,$depth,$cis);
4283: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4284: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4285: $safeeval,$depth,$cis);
4286: #do we have any specified web size of the picture?
4287: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4288: $depth,1);
4289: if ($TeXwidth) {
4290: my $old_width_param=$width_param;
4291: if ($TeXwidth=~/(\d+)\s*\%/) {
4292: $width_param = $1*$env{'form.textwidth'}/100;
4293: } else {
4294: $width_param = $TeXwidth;
4295: }
4296: if ($TeXheight) {
4297: $height_param = $TeXheight;
4298: } elsif ($old_width_param) {
4299: $height_param=$TeXwidth/$old_width_param*$height_param;
4300: }
4301: } elsif ($TeXheight) {
4302: $height_param = $TeXheight;
4303: if ($height_param) {
4304: $width_param = $TeXheight/$height_param*$width_param;
4305: }
4306: } elsif ($width) {
4307: my $old_width_param=$width_param;
4308: $width_param = $width*$scaling;
4309: if ($old_width_param) {
4310: $height_param=$width_param/$old_width_param*$height_param;
4311: }
4312: }
4313: if ($width_param > $env{'form.textwidth'}) {
4314: my $old_width_param=$width_param;
4315: $width_param =0.95*$env{'form.textwidth'};
4316: if ($old_width_param) {
4317: $height_param=$width_param/$old_width_param*$height_param;
4318: }
4319: }
4320:
4321: return ($height_param, $width_param);
4322: }
4323:
4324: sub image_size {
4325: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4326:
4327: #size of image from gif/jpg/jpeg/png
4328: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4329: if (-e $ressrc) {
4330: $src = $ressrc;
4331: }
4332: my $image = Image::Magick->new;
4333: my $current_figure = $image->Read($src);
4334: my $width_param = $image->Get('width');
4335: my $height_param = $image->Get('height');
4336: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4337: undef($image);
4338:
4339: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4340: $scaling, $parstack, $safeeval,
4341: $depth, $cis);
4342:
4343: return ($height_param, $width_param);
4344: }
4345:
4346: sub image_width {
4347: my ($height, $width) = &image_size(@_);
4348: return $width;
4349: }
4350: # Not yet 100% sure this is correct in all circumstances..
4351: # due to my uncertainty about mods to image_size.
4352: #
4353: sub image_height {
4354: my ($height, $width) = &image_size(@_);
4355: return $height;
4356: }
4357:
4358: sub get_eps_image {
4359: my ($src)=@_;
4360: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4361:
4362: # In order to prevent the substitution of the alt text, we need to
4363: # be sure the orig_src file is on system now so:
4364:
4365: if (! -e $orig_src) {
4366: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4367: }
4368: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4369: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4370: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4371: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4372: &Apache::lonxml::debug("Filelocation gives: $src");
4373: if (! -e $src) {
4374: &Apache::lonxml::debug("$src does not exist");
4375: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4376: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4377: #if replication failed try to find ps file
4378: $src=~s/\.eps$/\.ps/;
4379: &Apache::lonxml::debug("Now looking for $src");
4380: #if no ps file try to replicate it.
4381: my $didrepcopy = &Apache::lonnet::repcopy($src);
4382: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4383: if ( (not -e $src) ||
4384: ($didrepcopy ne 'ok')) {
4385: &Apache::lonxml::debug("Failed to find or replicate $src");
4386:
4387: #if replication failed try to produce eps file dynamically
4388: $src=~s/\.ps$/\.eps/;
4389: my $temp_file;
4390: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4391: my $newsrc=$orig_src;
4392: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4393: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4394: print FILE ("$newsrc\n");
4395: close(FILE);
4396: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4397: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4398: if ($sext ne "") { # Put the ext. back in to uniquify.
4399: $src =~ s/\.eps$/$sext.eps/;
4400: }
4401:
4402: }
4403:
4404: }
4405: } else {
4406: # If the postscript file has spaces in its name,
4407: # LaTeX will gratuitiously vomit. Therefore
4408: # queue such files for copy with " " replaced by "_".
4409: # printout.pm will know them by their .ps or .eps extensions.
4410: my $newsrc = $orig_src;
4411: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4412: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4413: print FILE "$src\n";
4414: close FILE;
4415: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4416: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4417: }
4418: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4419: $path =~ s/ /\_/g;
4420: $file =~ s/ /\_/g;
4421: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4422: return ($path.'/',$file);
4423: }
4424:
4425: sub eps_generation {
4426: my ($src,$file,$width_param) = @_;
4427: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4428: my $temp_file = Apache::File->new('>>'.$filename);
4429: print $temp_file "$src\n";
4430: my $newsrc = $src;
4431: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4432: $newsrc=~s{/home/httpd/html/res}{};
4433: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4434: $newsrc=~s{/\./}{/};
4435: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4436: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4437: $newsrc=~s{/home/httpd/lonUsers}{};
4438: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4439: }
4440: if ($newsrc=~m{/userfiles/}) {
4441: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4442: } else {
4443: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4444: }
4445: }
4446:
4447: sub file_path {
4448: my $src=shift;
4449: my ($file,$path);
4450: if ($src =~ m!(.*)/([^/]*)$!) {
4451: $file = $2;
4452: $path = $1.'/';
4453: }
4454: return $file,$path;
4455: }
4456: # Converts a measurement in to mm from any of
4457: # the other valid LaTeX units of measure.
4458: # If the units of measure are missing from the
4459: # parameter, it is assumed to be in and returned
4460: # with mm units of measure
4461: sub recalc {
4462: my $argument = shift;
4463: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4464: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4465: my $value=$1;
4466: my $units=$2;
4467: if ($units eq 'cm') {
4468: $value*=10;
4469: } elsif ($units eq 'in') {
4470: $value*=25.4;
4471: } elsif ($units eq 'pc') {
4472: $value*=(25.4*12/72.27);
4473: } elsif ($units eq 'pt') {
4474: $value*=(25.4/72.27);
4475: }
4476: return $value.' mm';
4477: }
4478:
4479: sub LATEX_length {
4480: my $garbage=shift;
4481: $garbage=~s/^\s+$//;
4482: $garbage=~s/^\s+(\S.*)/$1/;#space before
4483: $garbage=~s/(.*\S)\s+$/$1/;#space after
4484: $garbage=~s/(\s)+/$1/;#only one space
4485: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4486: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4487: $garbage=~s/([^\\])\$/$1/g;#$
4488: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4489: $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;
4490: $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;
4491: $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;
4492: $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;
4493: $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;
4494: $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;
4495: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4496: #remove some other LaTeX command
4497: $garbage=~s|\\(\w+)\\|\\|g;
4498: $garbage=~s|\\(\w+)(\s*)|$2|g;
4499: $garbage=~s|\+|11|g;
4500: my $value=length($garbage);
4501: return $value;
4502: }
4503:
4504: # Wrap image 'stuff' inside of the LaTeX required to implement
4505: # alignment:
4506: # align_tex_image(align, latex_rendering, image)
4507: # Where:
4508: # align - The HTML alignment specification.
4509: # latex_rendering - rendering hint for latex.
4510: # image - The LaTeX needed to insert the image itsef.
4511: # width,height - dimensions of the image.
4512: # Returns:
4513: # The 1/2 wrapped image and the stuff required to close the
4514: # wrappage. This allows e.g. randomlabel to insert more stuff
4515: # into the closure.
4516: #
4517: sub align_latex_image {
4518: my ($align, $latex_rendering, $image, $width, $height) = @_;
4519: my $currentstring; # The 1/2 wrapped image.
4520: my $closure; # The closure of the wrappage.
4521: # If there's an alignment specification we need to honor it here.
4522: # For the horizontal alignments, we will also honor the
4523: # value of the latex specfication. The default is parbox,
4524: # and that's used for illegal values too.
4525: #
4526: # Even though we set a default alignment value, the user
4527: # could have given us an illegal value. In that case we
4528: # just use the default alignment of bottom..
4529: $currentstring = "\n% figurewrapping \n";
4530: if ($align eq "top") {
4531: $currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
4532: $closure = '}';
4533: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4534: my $offset = $height/2;
4535: $currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
4536: $closure = '}';
4537: } elsif ($align eq "left") {
4538: if ($latex_rendering eq "parpic") {
4539: $currentstring .= '\parpic[l]{'.$image;
4540: $closure = '}';
4541: } elsif ($latex_rendering eq "parbox") {
4542: $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
4543: .$image;
4544: $closure = '\end{minipage}';
4545: } elsif ($latex_rendering eq "wrapfigure"
4546: || $latex_rendering ne 'none') { # wrapfig render
4547: $currentstring .=
4548: '\begin{wrapfigure}{l}{'.$width.'mm}'
4549: .'\scalebox{1.0}{'.$image;
4550: $closure = '}\end{wrapfigure}';
4551: }
4552: } elsif ($align eq "right") {
4553: if ($latex_rendering eq "parpic") {
4554: $currentstring .= '\parpic[r]{'.$image;
4555: $closure = '}';
4556: } elsif ($latex_rendering eq "parbox") {
4557: $currentstring .= '\begin{minipage}[r]{'.$width.'mm}'
4558: .$image;
4559: $closure = '\end{minipage}';
4560: } elsif ($latex_rendering eq "wrapfigure"
4561: || $latex_rendering ne 'none') { # wrapfig render
4562: $currentstring .=
4563: '\begin{wrapfigure}{r}{'.$width.'mm}'
4564: .'\scalebox{1.0}{'.$image;
4565: $closure = '}\end{wrapfigure}';
4566: }
4567: } else { # Bottom is also default.
4568: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4569: $currentstring .= "{$image";
4570: $closure = '}';
4571: }
4572: $currentstring .= "\n% end wrappage\n";
4573: $closure = "\n% Begin closure\n".$closure."\n% End closure\n";
4574: return ($currentstring, $closure);
4575: }
4576:
4577: # is_inside_of $tagstack $tag
4578: # This sub returns true if the current state of Xml processing
4579: # is inside of the tag.
4580: # Parameters:
4581: # tagstack - The tagstack from the parser.
4582: # tag - The tag (without the <>'s.).
4583: # Sample usage:
4584: # if (is_inside_of($tagstack "table")) {
4585: # # I'm in a table....
4586: # }
4587: sub is_inside_of {
4588: my ($tagstack, $tag) = @_;
4589: my @stack = @$tagstack;
4590: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4591: if ($stack[$i] eq $tag) {
4592: return 1;
4593: }
4594: }
4595: return 0;
4596: }
4597:
4598:
4599: 1;
4600: __END__
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