1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.364 2007/04/06 10:41:45 foxr Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: use LONCAPA();
52: # use Data::Dumper;
53:
54: BEGIN {
55:
56: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
57:
58: }
59:
60: #
61: # Dumps all elements of the table structure.
62: # Need this 'cause evidently when given an array, Data::Dumper only seems
63: # to dump element 0.
64: #
65: #sub debug_dump_table {
66: # my $lastrow = $#Apache::londefdef::table;
67: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
68: # my $row;
69: # for ($row =0; $row <= $lastrow; $row++ ) {
70: # my $text = Dumper($Apache::londefdef::table[$row]);
71: # &Apache::lonnet::logthis("table [ $row ]".$text);
72: # }
73: #}
74: sub initialize_londefdef {
75: $Apache::londefdef::TD_redirection=0;
76: @Apache::londefdef::table = ();
77: $Apache::londefdef::select=0;
78: undef(@Apache::londefdef::description);
79: @Apache::londefdef::DD=(0);
80: @Apache::londefdef::DT=(0);
81: @Apache::londefdef::seenDT=(0);
82: $Apache::londefdef::list_index=0;
83: undef($Apache::londefdef::head);
84: undef($Apache::londefdef::title);
85: }
86:
87: #======================= TAG SUBROUTINES =====================
88: #-- <output>
89: sub start_output {
90: my ($target) = @_;
91: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
92: return '';
93: }
94: sub end_output {
95: my ($target) = @_;
96: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
97: return '';
98: }
99: #-- <m> tag
100: sub start_m {
101: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
102: my $currentstring = '';
103: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
104: if ($target eq 'web' || $target eq 'analyze') {
105: &Apache::lonxml::debug("M is starting with:$inside:");
106: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
107: if ($eval eq 'on') {
108: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
109: #&Apache::lonxml::debug("M is evaulated to:$inside:");
110: }
111: my $tex = $inside;
112: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
113: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
114: if ($Apache::lontexconvert::errorstring) {
115: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
116: $tex = &HTML::Entities::encode($tex,'<>&"');
117: my ($linenumber) =
118: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
119: if (defined($linenumber)) {
120: my @tex=split("\n",$tex);
121: $tex[$linenumber]='<b><font color="red">'.
122: $tex[$linenumber].'</font></b>';
123: $tex=join("\n",@tex);
124: }
125: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
126: $Apache::lontexconvert::errorstring='';
127: }
128: #&Apache::lonxml::debug("M is ends with:$currentstring:");
129: $Apache::lonxml::post_evaluate=0;
130: } elsif ($target eq 'tex') {
131:
132: $currentstring = $inside;
133: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
134: if ($eval eq 'on') {
135: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
136: }
137: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
138: # detect simple math mode entry exits, and convert them
139: # to use \ensuremath ... unless there's a \verb inside.
140: if (! ($currentstring=~/\\verb/)) {
141: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
142: $currentstring=~s/^(\s*)\$/$1/;
143: $currentstring=~s/\$(\s*)$/$1/;
144: $currentstring='\ensuremath{'.$currentstring.'}';
145: }
146: }
147: $Apache::lonxml::post_evaluate=0;
148: }
149: return $currentstring;
150: }
151:
152: sub end_m {
153: my ($target,$token) = @_;
154: my $currentstring = '';
155: if ($target eq 'tex') {
156: $currentstring = "";
157: }
158: return $currentstring;
159: }
160:
161: sub start_tthoption {
162: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
163: my $result;
164: if ($target eq 'web' || $target eq 'webgrade') {
165: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
166: $style);
167: $inside=~s/^\s*//;
168: if ($env{'browser.mathml'}) {
169: &tth::ttmoptions($inside);
170: } else {
171: &tth::tthoptions($inside);
172: }
173: }
174: return $result;
175: }
176:
177: sub end_tthoption {
178: my ($target,$token) = @_;
179: my $result;
180: return $result;
181: }
182:
183: #-- <html> tag (end tag optional)
184: sub start_html {
185: my ($target,$token) = @_;
186: my $currentstring = '';
187: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
188: # start_body() takes care of emitting the <html>
189: } elsif ($target eq 'tex') {
190: $currentstring .=
191: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
192: if (($env{'form.latex_type'}=~'batchmode') ||
193: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
194: $currentstring .= '\newcommand{\keephidden}[1]{}'.
195: '\renewcommand{\deg}{$^{\circ}$}'.
196: '\usepackage{multirow}'.
197: '\usepackage{longtable}'.
198: '\usepackage{textcomp}'.
199: '\usepackage{makeidx}'.
200: '\usepackage[dvips]{graphicx}'.
201: '\usepackage{wrapfig}'.
202: '\usepackage{picins}'.
203: '\usepackage{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: $realm=~s/\s+//g;
485: $realm=~s/\//\_/g;
486: $realm=~s/^\_//;
487: $realm=~s/\W/\;/g;
488: $role=~s/\s+//g;
489: $role=~s/\//\_/g;
490: $role=~s/\W/\;/g;
491: if ($target eq 'web') {
492: my $args='';
493: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
494: if ($args eq '') {
495: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
496: } else {
497: $currentstring = $token->[4];
498: }
499: }
500: if ($target eq 'meta') {
501: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
502: }
503: return $currentstring;
504: }
505:
506: sub end_accessrule {
507: my ($target,$token,$tagstack,$parstack,$parser) = @_;
508: my $currentstring = '';
509: if ($target eq 'web') {
510: my $args='';
511: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
512: if ($args ne '') {
513: $currentstring = $token->[4];
514: }
515: }
516: return $currentstring;
517: }
518:
519: #-- <body> tag (end tag required)
520: sub start_body {
521: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
522: my $currentstring = '';
523:
524: if ($target eq 'web' || $target eq 'webgrade') {
525: if ($Apache::lonhomework::parsing_a_problem) {
526: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
527: return '';
528: }
529:
530: if (&is_inside_of($tagstack, "head")) {
531: &end_head(@_);
532: }
533: $currentstring =
534: &Apache::loncommon::start_page($Apache::londefdef::title,
535: $Apache::londefdef::head,
536: {'add_entries' => $token->[2],
537: 'no_title' => 1,
538: 'force_register' => 1});
539:
540: if ($env{'request.state'} ne 'published') {
541: $currentstring.=&Apache::lonmenu::constspaceform();
542: $currentstring.=(<<EDITBUTTON);
543: <form method="post">
544: <input type="submit" name="editmode" accesskey="e" value="Edit" />
545: </form>
546: <br />
547: EDITBUTTON
548: }
549: $currentstring.=&Apache::lonxml::message_location();
550: } elsif ($target eq 'tex') {
551: $currentstring = '\begin{document}';
552: }
553: return $currentstring;
554: }
555:
556: sub end_body {
557: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
558: my $currentstring = &end_p(); # Close off unclosed <p>
559: if ($target eq 'web' || $target eq 'webgrade') {
560: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
561: } elsif ($target eq 'tex') {
562: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
563: }
564: return $currentstring;
565: }
566:
567: # \begin{center} causes a new paragprah spacing that looks odd inside
568: # of a table cell. Same at the end of a \center but with a slightly
569: # larger space .. hence center_correction and center_end_correction.
570: #
571: sub center_correction { return '\vspace*{-6 mm}'; }
572: sub center_end_correction { return '\vspace*{-7 mm}'; }
573:
574: #-- <center> tag (end tag required)
575: sub start_center {
576: my ($target,$token,$tagstack) = @_;
577: my $currentstring = &end_p(); # Close off any prior para.
578: if ($target eq 'web' || $target eq 'webgrade') {
579: $currentstring .= $token->[4];
580: } elsif ($target eq 'tex') {
581: if (&is_inside_of($tagstack, "table")) {
582: $currentstring .= ¢er_correction();
583: }
584: $currentstring .= '\begin{center}';
585: }
586: return $currentstring;
587: }
588:
589: sub end_center {
590: my ($target,$token,$tagstack) = @_;
591: my $currentstring = '';
592: if ($target eq 'web' || $target eq 'webgrade') {
593: $currentstring = $token->[2];
594: } elsif ($target eq 'tex') {
595: $currentstring = '\end{center}';
596: if (&is_inside_of($tagstack, "table")) {
597: $currentstring .= ¢er_end_correction();
598: }
599: }
600: return $currentstring;
601: }
602:
603: #-- <b> tag (end tag required)
604: # NOTE: In TeX mode disables internal <p>
605: sub start_b {
606: my ($target,$token) = @_;
607: my $currentstring = '';
608: if ($target eq 'web' || $target eq 'webgrade') {
609: $currentstring = $token->[4];
610: } elsif ($target eq 'tex') {
611: &disable_para();
612: $currentstring .= '\textbf{';
613: }
614: return $currentstring;
615: }
616:
617: sub end_b {
618: my ($target,$token) = @_;
619: my $currentstring = '';
620: if ($target eq 'web' || $target eq 'webgrade') {
621: $currentstring = $token->[2];
622: } elsif ($target eq 'tex') {
623: &enable_para();
624: $currentstring = '}';
625: }
626: return $currentstring;
627: }
628:
629: #-- <strong> tag (end tag required)
630: # NOTE: in TeX mode disables internal <p>
631: sub start_strong {
632: my ($target,$token) = @_;
633: my $currentstring = '';
634: if ($target eq 'web' || $target eq 'webgrade') {
635: $currentstring = $token->[4];
636: } elsif ($target eq 'tex') {
637: &disable_para();
638: $currentstring = '\textbf{';
639: }
640: return $currentstring;
641: }
642:
643: sub end_strong {
644: my ($target,$token) = @_;
645: my $currentstring = '';
646: if ($target eq 'web' || $target eq 'webgrade') {
647: $currentstring = $token->[2];
648: } elsif ($target eq 'tex') {
649: &enable_para();
650: $currentstring = '}';
651: }
652: return $currentstring;
653: }
654:
655: #-- <h1> tag (end tag required)
656: sub start_h1 {
657: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
658: my $currentstring = &end_p(); # Close off any prior para.
659: if ($target eq 'web' || $target eq 'webgrade') {
660: $currentstring .= $token->[4];
661: } elsif ($target eq 'tex') {
662: my $pre;
663: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
664: if ($align eq 'center') {
665: $pre='\begin{center}';
666: } elsif ($align eq 'left') {
667: $pre='\rlap{';
668: } elsif ($align eq 'right') {
669: $pre=' \hfill \llap{';
670: }
671: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
672: if (not defined $TeXsize) {$TeXsize="large";}
673: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
674: } elsif ($target eq 'meta') {
675: $currentstring.='<subject>';
676: &start_output($target);
677: }
678: return $currentstring;
679: }
680:
681: sub end_h1 {
682: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
683: my $currentstring = '';
684: if ($target eq 'web' || $target eq 'webgrade') {
685: $currentstring .= $token->[2];
686: } elsif ($target eq 'tex') {
687: my $post='\vskip 0 mm ';
688: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
689: if ($align eq 'center') {
690: $post='\end{center}';
691: } elsif ($align eq 'left') {
692: $post='} \hfill'.'\vskip 0 mm ';
693: } elsif ($align eq 'right') {
694: $post='}'.'\vskip 0 mm ';
695: }
696: $currentstring .= '}}'.$post;
697: } elsif ($target eq 'meta') {
698: &end_output($target);
699: $currentstring='</subject>';
700: }
701: return $currentstring;
702: }
703:
704: #-- <h2> tag
705: sub start_h2 {
706: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
707: my $currentstring = &end_p(); # Close off any prior para.
708: if ($target eq 'web' || $target eq 'webgrade') {
709: $currentstring .= $token->[4];
710: } elsif ($target eq 'tex') {
711: my $pre;
712: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
713: if ($align eq 'center') {
714: $pre='\begin{center}';
715: } elsif ($align eq 'left') {
716: $pre='\rlap{';
717: } elsif ($align eq 'right') {
718: $pre=' \hfill \llap{';
719: }
720: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
721: if (not defined $TeXsize) {$TeXsize="large";}
722: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
723: }
724: return $currentstring;
725: }
726:
727: sub end_h2 {
728: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
729: my $currentstring = '';
730: if ($target eq 'web' || $target eq 'webgrade') {
731: $currentstring .= $token->[2];
732: } elsif ($target eq 'tex') {
733: my $post='\vskip 0 mm ';
734: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
735: if ($align eq 'center') {
736: $post='\end{center}';
737: } elsif ($align eq 'left') {
738: $post='} \hfill'.'\vskip 0 mm ';
739: } elsif ($align eq 'right') {
740: $post='}'.'\vskip 0 mm ';
741: }
742: $currentstring .= '}}'.$post;
743: }
744: return $currentstring;
745: }
746:
747: #-- <h3> tag
748: sub start_h3 {
749: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
750: my $currentstring = &end_p(); # Close off any prior para.
751: if ($target eq 'web' || $target eq 'webgrade') {
752: $currentstring .= $token->[4];
753: } elsif ($target eq 'tex') {
754: my $pre;
755: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
756: if ($align eq 'center') {
757: $pre='\begin{center}';
758: } elsif ($align eq 'left') {
759: $pre='\rlap{';
760: } elsif ($align eq 'right') {
761: $pre=' \hfill \llap{';
762: }
763: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
764: if (not defined $TeXsize) {$TeXsize="large";}
765: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
766: }
767: return $currentstring;
768: }
769:
770: sub end_h3 {
771: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
772: my $currentstring = '';
773: if ($target eq 'web' || $target eq 'webgrade') {
774: $currentstring .= $token->[2];
775: } elsif ($target eq 'tex') {
776: my $post='\vskip 0 mm ';
777: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
778: if ($align eq 'center') {
779: $post='\end{center}';
780: } elsif ($align eq 'left') {
781: $post='} \hfill'.'\vskip 0 mm ';
782: } elsif ($align eq 'right') {
783: $post='}'.'\vskip 0 mm ';
784: }
785: $currentstring .= '}}'.$post;
786: }
787: return $currentstring;
788: }
789:
790: #-- <h4> tag
791: sub start_h4 {
792: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
793: my $currentstring = &end_p(); # Close off any prior para.
794: if ($target eq 'web' || $target eq 'webgrade') {
795: $currentstring .= $token->[4];
796: } elsif ($target eq 'tex') {
797: my $pre;
798: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
799: if ($align eq 'center') {
800: $pre='\begin{center}';
801: } elsif ($align eq 'left') {
802: $pre='\rlap{';
803: } elsif ($align eq 'right') {
804: $pre=' \hfill \llap{';
805: }
806: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
807: if (not defined $TeXsize) {$TeXsize="large";}
808: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
809: }
810: return $currentstring;
811: }
812:
813: sub end_h4 {
814: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
815: my $currentstring = '';
816: if ($target eq 'web' || $target eq 'webgrade') {
817: $currentstring .= $token->[2];
818: } elsif ($target eq 'tex') {
819: my $post='\vskip 0 mm ';
820: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
821: if ($align eq 'center') {
822: $post='\end{center}';
823: } elsif ($align eq 'left') {
824: $post='} \hfill'.'\vskip 0 mm ';
825: } elsif ($align eq 'right') {
826: $post='}'.'\vskip 0 mm ';
827: }
828: $currentstring .= '}}'.$post;
829: }
830: return $currentstring;
831: }
832:
833: #-- <h5> tag
834: sub start_h5 {
835: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
836: my $currentstring = &end_p(); # Close off any prior paras.
837: if ($target eq 'web' || $target eq 'webgrade') {
838: $currentstring .= $token->[4];
839: } elsif ($target eq 'tex') {
840: my $pre;
841: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
842: if ($align eq 'center') {
843: $pre='\begin{center}';
844: } elsif ($align eq 'left') {
845: $pre='\rlap{';
846: } elsif ($align eq 'right') {
847: $pre=' \hfill \llap{';
848: }
849: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
850: if (not defined $TeXsize) {$TeXsize="large";}
851: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
852: }
853: return $currentstring;
854: }
855:
856: sub end_h5 {
857: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
858: my $currentstring = '';
859: if ($target eq 'web' || $target eq 'webgrade') {
860: $currentstring .= $token->[2];
861: } elsif ($target eq 'tex') {
862: my $post='\vskip 0 mm ';
863: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
864: if ($align eq 'center') {
865: $post='\end{center}';
866: } elsif ($align eq 'left') {
867: $post='} \hfill'.'\vskip 0 mm ';
868: } elsif ($align eq 'right') {
869: $post='}'.'\vskip 0 mm ';
870: }
871: $currentstring .= '}}'.$post;
872: }
873: return $currentstring;
874: }
875:
876: #-- <h6> tag
877: sub start_h6 {
878: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
879: my $currentstring = &end_p(); # Close off any prior paras.
880: if ($target eq 'web' || $target eq 'webgrade') {
881: $currentstring .= $token->[4];
882: } elsif ($target eq 'tex') {
883: my $pre;
884: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
885: if ($align eq 'center') {
886: $pre='\begin{center}';
887: } elsif ($align eq 'left') {
888: $pre='\rlap{';
889: } elsif ($align eq 'right') {
890: $pre=' \hfill \llap{';
891: }
892: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
893: if (not defined $TeXsize) {$TeXsize="large";}
894: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
895: }
896: return $currentstring;
897: }
898:
899: sub end_h6 {
900: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
901: my $currentstring = '';
902: if ($target eq 'web' || $target eq 'webgrade') {
903: $currentstring .= $token->[2];
904: } elsif ($target eq 'tex') {
905: my $post='\vskip 0 mm ';
906: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
907: if ($align eq 'center') {
908: $post='\end{center}';
909: } elsif ($align eq 'left') {
910: $post='} \hfill'.'\vskip 0 mm ';
911: } elsif ($align eq 'right') {
912: $post='}'.'\vskip 0 mm ';
913: }
914: $currentstring .= '}}'.$post;
915: }
916: return $currentstring;
917: }
918:
919: #--- <cite> tag (end tag required)
920: sub start_cite {
921: my ($target,$token) = @_;
922: my $currentstring = '';
923: if ($target eq 'web' || $target eq 'webgrade') {
924: $currentstring .= $token->[4];
925: } elsif ($target eq 'tex') {
926: $currentstring .= '\textit{';
927: }
928: return $currentstring;
929: }
930:
931: sub end_cite {
932: my ($target,$token) = @_;
933: my $currentstring = '';
934: if ($target eq 'web' || $target eq 'webgrade') {
935: $currentstring .= $token->[2];
936: } elsif ($target eq 'tex') {
937: $currentstring .= '}';
938: }
939: return $currentstring;
940: }
941:
942: #-- <i> tag (end tag required)
943: sub start_i {
944: my ($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 $currentstring;
952: }
953:
954: sub end_i {
955: my ($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 $currentstring;
963: }
964:
965: #-- <address> tag (end tag required)
966: sub start_address {
967: my ($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 $currentstring;
975: }
976:
977: sub end_address {
978: my ($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 $currentstring;
986: }
987:
988: #-- <dfn> tag (end tag required)
989: sub start_dfn {
990: my ($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 $currentstring;
998: }
999:
1000: sub end_dfn {
1001: my ($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 $currentstring;
1009: }
1010:
1011: #-- <tt> tag (end tag required)
1012: sub start_tt {
1013: my ($target,$token) = @_;
1014: my $currentstring = '';
1015: if ($target eq 'web' || $target eq 'webgrade') {
1016: $currentstring .= $token->[4];
1017: } elsif ($target eq 'tex') {
1018: $currentstring .= '\texttt{';
1019: }
1020: return $currentstring;
1021: }
1022:
1023: sub end_tt {
1024: my ($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 $currentstring;
1032: }
1033:
1034: #-- <kbd> tag (end tag required)
1035: sub start_kbd {
1036: my ($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 $currentstring;
1044: }
1045:
1046: sub end_kbd {
1047: my ($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 $currentstring;
1055: }
1056:
1057: #-- <code> tag (end tag required)
1058: sub start_code {
1059: my ($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 $currentstring;
1067: }
1068:
1069: sub end_code {
1070: my ($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 $currentstring;
1078: }
1079:
1080: #-- <em> tag (end tag required)
1081: sub start_em {
1082: my ($target,$token) = @_;
1083: my $currentstring = '';
1084: if ($target eq 'web' || $target eq 'webgrade') {
1085: $currentstring .= $token->[4];
1086: } elsif ($target eq 'tex') {
1087: $currentstring .= '\emph{';
1088: }
1089: return $currentstring;
1090: }
1091:
1092: sub end_em {
1093: my ($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 $currentstring;
1101: }
1102:
1103: #-- <q> tag (end tag required)
1104: sub start_q {
1105: my ($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 $currentstring;
1113: }
1114:
1115: sub end_q {
1116: my ($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: # <p> is a bit strange since it does not require a closing </p>
1127: # However in latex, we must often output closing stuff to end
1128: # environments and {}'s etc. Therefore we do all the work
1129: # of figuring out the ending strings in the start tag processing,
1130: # and provide a mechanism to output the stop text external
1131: # to tag processing.
1132: #
1133: {
1134:
1135: my $closing_string = ''; # String required to close <p>
1136:
1137: # Some tags are <p> fragile meaning that <p> inside of them
1138: # does not work within TeX mode. This is managed via the
1139: # counter below:
1140: #
1141:
1142: my $para_disabled = 0;
1143:
1144: sub disable_para {
1145: $para_disabled++;
1146: }
1147: sub enable_para {
1148: $para_disabled--;
1149: }
1150:
1151:
1152: #-- <p> tag (end tag optional)
1153: #optional attribute - align="center|left|right"
1154: sub start_p {
1155: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1156: my $currentstring = '';
1157: if ($target eq 'web' || $target eq 'webgrade') {
1158: $currentstring .= &end_p(); # close off prior para if in progress.
1159: $currentstring .= $token->[4];
1160: if (! ($currentstring =~ /\//)) {
1161: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1162: }
1163: } elsif ($target eq 'tex' && !$para_disabled) {
1164:
1165: $currentstring .= &end_p(); # close off prior para if in progress.
1166: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1167: if ($align eq 'center') {
1168: $currentstring .='\begin{center}\par ';
1169: $closing_string = '\end{center}';
1170: if (&is_inside_of($tagstack, "table")) {
1171: $currentstring = ¢er_correction().$currentstring;
1172: }
1173: } elsif ($align eq 'right') {
1174: $currentstring.="\n".'{\flushright ';
1175: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1176: $closing_string= "}\n";
1177: } elsif ($align eq 'left') {
1178: $currentstring.= "\n".'{\flushleft ';
1179: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1180: $closing_string = "}\n";
1181: } else {
1182: $currentstring.='\par ';
1183: if (&is_inside_of($tagstack, 'table')) {
1184: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1185: } else {
1186: $closing_string = '\strut\\\\\strut ';
1187: }
1188: }
1189:
1190: }
1191: return $currentstring;
1192: }
1193: #
1194: # End paragraph processing just requires that we output the
1195: # closing string that was saved and blank it.
1196: sub end_p {
1197: # Note only 'tex' mode uses disable_para and enable_para
1198: # so we don't need to know the target in the check below:
1199:
1200: if (!$para_disabled) {
1201: my $current_string = $closing_string;
1202: $closing_string = ''; # Not in a para anymore.
1203: return $current_string;
1204: } else {
1205: return '';
1206: }
1207:
1208: }
1209: }
1210: #-- <br> tag (end tag forbidden)
1211: sub start_br {
1212: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1213: my $currentstring = '';
1214: if ($target eq 'web' || $target eq 'webgrade') {
1215: $currentstring .= $token->[4];
1216: } elsif ($target eq 'tex') {
1217: my @tempo=@$tagstack;
1218: my $signal=0;
1219: # Not going to factor this to is_inside_of since that would require
1220: # multiple stack traversals.
1221: #
1222: for (my $i=$#tempo;$i>=0;$i--) {
1223: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1224: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1225: $signal=1;
1226: }
1227: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1228: $signal = 1;
1229: }
1230: }
1231: if ($signal eq 1) {
1232: $currentstring .= ' \vskip 0 mm ';
1233: } else {
1234: $currentstring .= '\strut \\\\ \strut ';
1235: }
1236:
1237: }
1238: return $currentstring;
1239: }
1240:
1241: sub end_br {
1242: my ($target,$token) = @_;
1243: my $currentstring = '';
1244: if ($target eq 'web' || $target eq 'webgrade') {
1245: $currentstring .= $token->[2];
1246: }
1247: return $currentstring;
1248: }
1249:
1250: #-- <big> tag (end tag required)
1251: sub start_big {
1252: my ($target,$token) = @_;
1253: my $currentstring = '';
1254: if ($target eq 'web' || $target eq 'webgrade') {
1255: $currentstring .= $token->[4];
1256: } elsif ($target eq 'tex') {
1257: $currentstring .= '{\large ';
1258: }
1259: return $currentstring;
1260: }
1261:
1262: sub end_big {
1263: my ($target,$token) = @_;
1264: my $currentstring = '';
1265: if ($target eq 'web' || $target eq 'webgrade') {
1266: $currentstring .= $token->[2];
1267: } elsif ($target eq 'tex') {
1268: $currentstring .= '}';
1269: }
1270: return $currentstring;
1271: }
1272:
1273: #-- <small> tag (end tag required)
1274: sub start_small {
1275: my ($target,$token) = @_;
1276: my $currentstring = '';
1277: if ($target eq 'web' || $target eq 'webgrade') {
1278: $currentstring .= $token->[4];
1279: } elsif ($target eq 'tex') {
1280: $currentstring .= '{\footnotesize ';
1281: }
1282: return $currentstring;
1283: }
1284:
1285: sub end_small {
1286: my ($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 $currentstring;
1294: }
1295:
1296: #-- <basefont> tag (end tag forbidden)
1297: sub start_basefont {
1298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1299: my $currentstring = '';
1300: if ($target eq 'web' || $target eq 'webgrade') {
1301: $currentstring = $token->[4];
1302: } elsif ($target eq 'tex') {
1303: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1304: if (defined $basesize) {
1305: $currentstring = '{\\'.$basesize.' ';
1306: }
1307: }
1308: return $currentstring;
1309: }
1310:
1311: sub end_basefont {
1312: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1313: my $currentstring = '';
1314: if ($target eq 'web' || $target eq 'webgrade') {
1315: $currentstring = $token->[4];
1316: } elsif ($target eq 'tex') {
1317: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1318: if (defined $basesize) {
1319: $currentstring = '}';
1320: }
1321: }
1322: return $currentstring;
1323: }
1324:
1325: #-- <font> tag (end tag required)
1326: sub start_font {
1327: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1328: my $currentstring = '';
1329: if ($target eq 'web' || $target eq 'webgrade') {
1330: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1331: if ($face!~/symbol/i) {
1332: if (($env{'browser.fontenhance'} eq 'on') ||
1333: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1334: }
1335: $currentstring = $token->[4];
1336: } elsif ($target eq 'tex') {
1337: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1338: if (defined $fontsize) {
1339: $currentstring = '{\\'.$fontsize.' ';
1340: }
1341: }
1342: return $currentstring;
1343: }
1344:
1345: sub end_font {
1346: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1347: my $currentstring = '';
1348: if ($target eq 'web' || $target eq 'webgrade') {
1349: $currentstring = $token->[2];
1350: } elsif ($target eq 'tex') {
1351: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1352: if (defined $fontsize) {
1353: $currentstring = '}';
1354: }
1355: }
1356: return $currentstring;
1357: }
1358:
1359: #-- <strike> tag (end tag required)
1360: sub start_strike {
1361: my ($target,$token) = @_;
1362: my $currentstring = '';
1363: if ($target eq 'web' || $target eq 'webgrade') {
1364: $currentstring .= $token->[4];
1365: } elsif ($target eq 'tex') {
1366: &Apache::lonxml::startredirection();
1367: }
1368: return $currentstring;
1369: }
1370:
1371: sub end_strike {
1372: my ($target,$token) = @_;
1373: my $currentstring = '';
1374: if ($target eq 'web' || $target eq 'webgrade') {
1375: $currentstring .= $token->[2];
1376: } elsif ($target eq 'tex') {
1377: $currentstring=&Apache::lonxml::endredirection();
1378: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1379: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1380: $currentstring=~s/(\S)\s*$/$1\}/;
1381: }
1382: return $currentstring;
1383: }
1384:
1385: #-- <s> tag (end tag required)
1386: sub start_s {
1387: my ($target,$token) = @_;
1388: my $currentstring = '';
1389: if ($target eq 'web' || $target eq 'webgrade') {
1390: $currentstring .= $token->[4];
1391: } elsif ($target eq 'tex') {
1392: &Apache::lonxml::startredirection();
1393: }
1394: return $currentstring;
1395: }
1396:
1397: sub end_s {
1398: my ($target,$token) = @_;
1399: my $currentstring = '';
1400: if ($target eq 'web' || $target eq 'webgrade') {
1401: $currentstring .= $token->[2];
1402: } elsif ($target eq 'tex') {
1403: $currentstring=&Apache::lonxml::endredirection();
1404: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1405: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1406: $currentstring=~s/(\S)\s*$/$1\}/;
1407: }
1408: return $currentstring;
1409: }
1410:
1411: #-- <sub> tag (end tag required)
1412: sub start_sub {
1413: my ($target,$token) = @_;
1414: my $currentstring = '';
1415: if ($target eq 'web' || $target eq 'webgrade') {
1416: $currentstring .= $token->[4];
1417: } elsif ($target eq 'tex') {
1418: $currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1419: }
1420: return $currentstring;
1421: }
1422:
1423: sub end_sub {
1424: my ($target,$token) = @_;
1425: my $currentstring = '';
1426: if ($target eq 'web' || $target eq 'webgrade') {
1427: $currentstring .= $token->[2];
1428: } elsif ($target eq 'tex') {
1429: $currentstring .= '}}';
1430: }
1431: return $currentstring;
1432: }
1433:
1434: #-- <sup> tag (end tag required)
1435: sub start_sup {
1436: my ($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 $currentstring;
1444: }
1445:
1446: sub end_sup {
1447: my ($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 $currentstring;
1455: }
1456:
1457: #-- <hr> tag (end tag forbidden)
1458: sub start_hr {
1459: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1460: my $currentstring = &end_p(); # End enclosing para.
1461: if ($target eq 'web' || $target eq 'webgrade') {
1462: $currentstring .= $token->[4];
1463: } elsif ($target eq 'tex') {
1464:
1465: # <hr /> can't be inside of <sup><sub> thank you LaTeX.
1466: #
1467: my $restart_sub = 0;
1468: my $restart_sup = 0;
1469:
1470: # Since <sub> and <sup> are simple tags it's ok to turn off/on
1471: # using the start_ stop_ functions.. those tags only care about
1472: # $target.
1473:
1474: if (&is_inside_of($tagstack, "sub")) {
1475: $restart_sub = 1;
1476: $currentstring .= &end_sub($target, $token, $tagstack,
1477: $parstack, $parser, $safeeval);
1478: }
1479: if (&is_inside_of($tagstack, "sup")) {
1480: $restart_sup = 1;
1481: $currentstring .= &end_sup($target, $token, $tagstack,
1482: $parstack, $parser, $safeeval);
1483: }
1484:
1485: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1486: if (defined $LaTeXwidth) {
1487: if ($LaTeXwidth=~/^%/) {
1488: substr($LaTeXwidth,0,1)='';
1489: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1490: }
1491: } else {
1492: $LaTeXwidth ='0.9\textwidth';
1493: }
1494: my ($pre,$post);
1495: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1496: if (($align eq 'center') || (not defined $align)) {
1497: $pre=''; $post='';
1498: } elsif ($align eq 'left') {
1499: $pre='\rlap{'; $post='} \hfill';
1500: } elsif ($align eq 'right') {
1501: $pre=' \hfill \llap{'; $post='}';
1502: }
1503: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1504: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1505: # Turn stuff back on that we can't be inside of.
1506:
1507: if ($restart_sub) {
1508: $currentstring .= &start_sub($target, $token, $tagstack,
1509: $parstack, $parser, $safeeval);
1510: }
1511: if ($restart_sup) {
1512: $currentstring .= &start_sup($target, $token, $tagstack,
1513: $parstack, $parser, $safeeval);
1514: }
1515: }
1516: return $currentstring;
1517: }
1518:
1519: sub end_hr {
1520: my ($target,$token) = @_;
1521: my $currentstring = '';
1522: if ($target eq 'web' || $target eq 'webgrade') {
1523: $currentstring .= $token->[2];
1524: }
1525: return $currentstring;
1526: }
1527:
1528: #-- <div> tag (end tag required)
1529: {
1530:
1531: # Since div can be nested, the stack below is used
1532: # in 'tex' mode to store the ending strings
1533: # for the div stack.
1534:
1535: my @div_end_stack;
1536:
1537: sub start_div {
1538: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1539: my $currentstring = &end_p(); # Close enclosing para.
1540: if ($target eq 'web' || $target eq 'webgrade') {
1541: $currentstring .= $token->[4];
1542: }
1543: if ($target eq 'tex') {
1544: # 4 possible alignments: left, right, center, and -missing-.
1545:
1546: my $endstring = '';
1547:
1548: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1549: $safeeval, undef, 1));
1550: if ($align eq 'center') {
1551: $currentstring .= '\begin{center}';
1552: $endstring = '\end{center}';
1553: if (&is_inside_of($tagstack, "table")) {
1554: $currentstring = ¢er_correction().$currentstring;
1555: }
1556: }
1557: elsif ($align eq 'right') {
1558: $currentstring .= '\begin{flushright}';
1559: $endstring .= '\end{flushright}';
1560: } elsif ($align eq 'left') {
1561: $currentstring .= '\begin{flushleft}';
1562: $endstring = '\end{flushleft}';
1563: } else {
1564:
1565: }
1566: $currentstring .= "\n"; # For human readability.
1567: $endstring = "\n$endstring\n"; # For human readability
1568: push(@div_end_stack, $endstring);
1569: }
1570: return $currentstring;
1571: }
1572:
1573: sub end_div {
1574: my ($target,$token) = @_;
1575: my $currentstring = '';
1576: if ($target eq 'web' || $target eq 'webgrade') {
1577: $currentstring .= $token->[2];
1578: }
1579: if ($target eq 'tex') {
1580: my $endstring = pop @div_end_stack;
1581: $currentstring .= $endstring;
1582: }
1583: return $currentstring;
1584: }
1585: }
1586:
1587: #-- <a> tag (end tag required)
1588: sub start_a {
1589: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1590: my $currentstring = '';
1591: if ($target eq 'web' || $target eq 'webgrade') {
1592: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1593: undef,1);
1594: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1595: }
1596: return $currentstring;
1597: }
1598:
1599: sub end_a {
1600: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1601: my $currentstring = '';
1602: if ($target eq 'web' || $target eq 'webgrade') {
1603: $currentstring .= $token->[2];
1604: }
1605: if ($target eq 'tex') {
1606: my $href =
1607: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1608: my $name =
1609: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1610: if ($href =~ /\S/) {
1611: $href =~ s/([^\\])%/$1\\\%/g;
1612: $currentstring .= ' ({\tt URI:'.&Apache::lonxml::latex_special_symbols($href).'})';
1613: } elsif ($name =~ /\S/) {
1614: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1615: } else {
1616: $currentstring.='';
1617: }
1618: }
1619: return $currentstring;
1620: }
1621:
1622: #-- <li> tag (end tag optional)
1623: sub start_li {
1624: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1625: my $currentstring = '';
1626: if ($target eq 'web' || $target eq 'webgrade') {
1627: $currentstring = $token->[4];
1628: } elsif ($target eq 'tex') {
1629: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1630: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1631: #FIXME need to support types i and I
1632: if ($type=~/disc/) {
1633: $currentstring .= ' \item[$\bullet$] ';
1634: } elsif ($type=~/circle/) {
1635: $currentstring .= ' \item[$\circ$] ';
1636: } elsif ($type=~/square/) {
1637: $currentstring .= ' \item[$\diamond$] ';
1638: } elsif ($type eq '1') {
1639: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1640: } elsif ($type eq 'A') {
1641: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1642: } elsif ($type eq 'a') {
1643: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1644: } elsif ($value ne '') {
1645: $currentstring .= ' \item['.$value.'] ';
1646: } else {
1647: $currentstring .= ' \item ';
1648: }
1649: $Apache::londefdef::list_index++;
1650: }
1651: return $currentstring;
1652: }
1653:
1654: sub end_li {
1655: my ($target,$token) = @_;
1656: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1657: if ($target eq 'web' || $target eq 'webgrade') {
1658: $currentstring .= $token->[2];
1659: }
1660: return $currentstring;
1661: }
1662:
1663: #-- <u> tag (end tag required)
1664: sub start_u {
1665: my ($target,$token) = @_;
1666: my $currentstring = '';
1667: if ($target eq 'web' || $target eq 'webgrade') {
1668: $currentstring .= $token->[4];
1669: } elsif ($target eq 'tex') {
1670: &Apache::lonxml::startredirection();
1671: }
1672: return $currentstring;
1673: }
1674:
1675: sub end_u {
1676: my ($target,$token) = @_;
1677: my $currentstring = '';
1678: if ($target eq 'web' || $target eq 'webgrade') {
1679: $currentstring .= $token->[2];
1680: } elsif ($target eq 'tex') {
1681: $currentstring=&Apache::lonxml::endredirection();
1682: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1683: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1684: $currentstring=~s/(\S)\s*$/$1\}/;
1685: }
1686: return $currentstring;
1687: }
1688:
1689: #-- <ul> tag (end tag required)
1690: sub start_ul {
1691: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1692: my $currentstring = &end_p(); # Close off enclosing list.
1693: if ($target eq 'web' || $target eq 'webgrade') {
1694: $currentstring .= $token->[4];
1695: } elsif ($target eq 'tex') {
1696: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1697: $Apache::londefdef::list_index=0;
1698: if ($TeXtype eq 'disc') {
1699: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1700: '\renewcommand{\labelitemii}{$\bullet$}'.
1701: '\renewcommand{\labelitemiii}{$\bullet$}'.
1702: '\renewcommand{\labelitemiv}{$\bullet$}';
1703: } elsif ($TeXtype eq 'circle') {
1704: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1705: '\renewcommand{\labelitemii}{$\circ$}'.
1706: '\renewcommand{\labelitemiii}{$\circ$}'.
1707: '\renewcommand{\labelitemiv}{$\circ$}';
1708: } elsif ($TeXtype eq 'square') {
1709: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1710: '\renewcommand{\labelitemii}{$\diamond$}'.
1711: '\renewcommand{\labelitemiii}{$\diamond$}'.
1712: '\renewcommand{\labelitemiv}{$\diamond$}';
1713: }
1714: $currentstring .= '\strut \begin{itemize}';
1715: }
1716: return $currentstring;
1717: }
1718:
1719: sub end_ul {
1720: my ($target,$token) = @_;
1721: my $currentstring = '';
1722: if ($target eq 'web' || $target eq 'webgrade') {
1723: $currentstring = $token->[2];
1724: } elsif ($target eq 'tex') {
1725: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1726: '\renewcommand{\labelitemii}{$\bullet$}'.
1727: '\renewcommand{\labelitemiii}{$\bullet$}'.
1728: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1729: }
1730: return $currentstring;
1731: }
1732:
1733: #-- <menu> tag (end tag required)
1734: sub start_menu {
1735: my ($target,$token) = @_;
1736: my $currentstring = '';
1737: if ($target eq 'web' || $target eq 'webgrade') {
1738: $currentstring = $token->[4];
1739: } elsif ($target eq 'tex') {
1740: $currentstring = " \\begin{itemize} ";
1741: }
1742: return $currentstring;
1743: }
1744:
1745: sub end_menu {
1746: my ($target,$token) = @_;
1747: my $currentstring = '';
1748: if ($target eq 'web' || $target eq 'webgrade') {
1749: $currentstring = $token->[2];
1750: } elsif ($target eq 'tex') {
1751: $currentstring = " \\end{itemize}";
1752: }
1753: return $currentstring;
1754: }
1755:
1756: #-- <dir> tag (end tag required)
1757: sub start_dir {
1758: my ($target,$token) = @_;
1759: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1760: if ($target eq 'web' || $target eq 'webgrade') {
1761: $currentstring .= $token->[4];
1762: } elsif ($target eq 'tex') {
1763: $currentstring .= " \\begin{itemize} ";
1764: }
1765: return $currentstring;
1766: }
1767:
1768: sub end_dir {
1769: my ($target,$token) = @_;
1770: my $currentstring = '';
1771: if ($target eq 'web' || $target eq 'webgrade') {
1772: $currentstring = $token->[2];
1773: } elsif ($target eq 'tex') {
1774: $currentstring = " \\end{itemize}";
1775: }
1776: return $currentstring;
1777: }
1778:
1779: #-- <ol> tag (end tag required)
1780: sub start_ol {
1781: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1782: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1783: if ($target eq 'web' || $target eq 'webgrade') {
1784: $currentstring .= $token->[4];
1785: } elsif ($target eq 'tex') {
1786: $Apache::londefdef::list_index=0;
1787: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1788: if ($type eq '1') {
1789: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1790: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1791: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1792: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1793: } elsif ($type eq 'A') {
1794: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1795: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1796: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1797: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1798: } elsif ($type eq 'a') {
1799: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1800: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1801: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1802: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1803: } elsif ($type eq 'i') {
1804: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1805: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1806: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1807: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1808: } elsif ($type eq 'I') {
1809: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1810: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1811: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1812: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1813: }
1814: $currentstring .= '\strut \begin{enumerate}';
1815: }
1816: return $currentstring;
1817: }
1818:
1819: sub end_ol {
1820: my ($target,$token) = @_;
1821: my $currentstring = '';
1822: if ($target eq 'web' || $target eq 'webgrade') {
1823: $currentstring = $token->[2];
1824: } elsif ($target eq 'tex') {
1825: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1826: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1827: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1828: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1829: }
1830: return $currentstring;
1831: }
1832:
1833: #-- <dl> tag (end tag required)
1834: sub start_dl {
1835: my ($target,$token) = @_;
1836: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1837: if ($target eq 'web' || $target eq 'webgrade') {
1838: $currentstring .= $token->[4];
1839: } elsif ($target eq 'tex') {
1840: $currentstring .= '\begin{description}';
1841: $Apache::londefdef::DL++;
1842: push(@Apache::londefdef::description,[]);
1843: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1844: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1845: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1846: }
1847: return $currentstring;
1848: }
1849:
1850: sub end_dl {
1851: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1852: my $currentstring = '';
1853: if ($target eq 'web' || $target eq 'webgrade') {
1854: $currentstring = $token->[2];
1855: } elsif ($target eq 'tex') {
1856: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1857: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1858: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1859: $currentstring.=' '.$element.' ';
1860: }
1861: pop(@Apache::londefdef::description);
1862: $currentstring.='\end{description}';
1863: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1864: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1865: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1866: $Apache::londefdef::DL--;
1867: }
1868: return $currentstring;
1869: }
1870:
1871: #-- <dt> tag (end tag optional)
1872: sub start_dt {
1873: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1874: my $currentstring='';
1875: if ($target eq 'web' || $target eq 'webgrade') {
1876: $currentstring = $token->[4];
1877: } elsif ($target eq 'tex') {
1878: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1879: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1880: &Apache::lonxml::startredirection();
1881: $Apache::londefdef::DT[-1]++;
1882: $Apache::londefdef::seenDT[-1]=1;
1883: }
1884: return $currentstring;
1885: }
1886:
1887: sub end_dt {
1888: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1889: my $currentstring = '';
1890: if ($target eq 'web' || $target eq 'webgrade') {
1891: $currentstring = $token->[2];
1892: } elsif ($target eq 'tex') {
1893: if ($Apache::londefdef::DT[-1]) {
1894: my $data=&item_cleanup();
1895: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1896: $Apache::londefdef::DT[-1]--;
1897: }
1898: }
1899: return $currentstring;
1900: }
1901:
1902: sub item_cleanup {
1903: my $item=&Apache::lonxml::endredirection();
1904: $item=~s/\\begin{center}//g;
1905: $item=~s/\\end{center}//g;
1906: return $item;
1907: }
1908:
1909: #-- <dd> tag (end tag optional)
1910: sub start_dd {
1911: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1912: my $currentstring = '';
1913: if ($target eq 'web' || $target eq 'webgrade') {
1914: $currentstring = $token->[4];
1915: } elsif ($target eq 'tex') {
1916: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1917: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1918: if (!$Apache::londefdef::seenDT[-1]) {
1919: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1920: }
1921: push(@{$Apache::londefdef::description[-1]},'');
1922: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1923: $Apache::londefdef::DD[-1]++;
1924: &Apache::lonxml::startredirection();
1925: }
1926: return $currentstring;
1927: }
1928:
1929: sub end_dd {
1930: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1931: my $currentstring = '';
1932: if ($target eq 'web' || $target eq 'webgrade') {
1933: $currentstring = $token->[2];
1934: } elsif ($target eq 'tex') {
1935: $Apache::londefdef::description[-1]->[-1].=
1936: &Apache::lonxml::endredirection().' \vskip 0mm ';
1937: $Apache::londefdef::DD[-1]--;
1938: }
1939: return $currentstring;
1940: }
1941:
1942: #-- <table> tag (end tag required)
1943: # <table> also ends any prior <p> that is not closed.
1944: # but, unless I allow <p>'s to nest, that's the
1945: # only way I could think of to allow <p> in
1946: # <tr> <th> bodies
1947: #
1948: #list of supported attributes: border,width,TeXwidth
1949: sub start_table {
1950: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1951: my $textwidth = '';
1952: my $currentstring = &end_p();
1953: if ($target eq 'web' || $target eq 'webgrade') {
1954: $currentstring .= $token->[4];
1955: } elsif ($target eq 'tex') {
1956: push(@Apache::londefdef::table, {});
1957: $Apache::londefdef::table[-1]{'row_number'} = -1;
1958: #maximum table's width (default coincides with text line length)
1959: if ($#Apache::londefdef::table==0) {
1960: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1961: $textwidth=~/(\d+\.?\d*)/;
1962: $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
1963: } else {
1964: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1965: #the maximum width of nested table is determined by LATeX width of parent cell
1966: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1967: } else {
1968: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1969: $textwidth=$Apache::londefdef::table[-2]{'width'};
1970: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1971: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1972: }
1973: }
1974: }
1975:
1976: # width either comes forced from the TeXwidth or the width parameters.
1977: # in either case it can be a percentage or absolute width.
1978: # in the width case we ignore absolute width
1979: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1980: if (!defined($TeXwidth)) {
1981: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1982: $safeeval,undef,1);
1983: if ($htmlwidth =~ /%/) {
1984: $TeXwidth = $htmlwidth;
1985: } else {
1986: $TeXwidth = $textwidth;
1987: }
1988: }
1989: # if the width is specified as a % it is converted to an absolute width.
1990: # otherwise.. just plugged right in the hash
1991:
1992: if ($TeXwidth=~/%/) {
1993: $TeXwidth=~/(\d+)/;
1994: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1995: } else {
1996: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1997: }
1998: # In the end, however the table width cannot be wider than $textwidth...
1999:
2000: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
2001: $Apache::londefdef::table[-1]{'width'} = $textwidth;
2002: }
2003: #table's border
2004: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2005: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2006: unless (defined $border) { $border = 0; }
2007: if ($border) {
2008: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
2009: $Apache::londefdef::table[-1]{'vinc'} = '&';
2010: $Apache::londefdef::table[-1]{'vvinc'} = '|';
2011: } else {
2012: $Apache::londefdef::table[-1]{'hinc'} = '';
2013: $Apache::londefdef::table[-1]{'vinc'} = '&';
2014: $Apache::londefdef::table[-1]{'vvinc'} = '';
2015: }
2016: if ($#Apache::londefdef::table==0) {
2017: # Note that \newline seems to destroy the alignment envs.
2018: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2019: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2020: }
2021: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2022: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2023: $Apache::londefdef::table[-1]{'objectlen'}=[];
2024: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2025: $Apache::londefdef::table[-1]{'maxlen'}=[];
2026: $Apache::londefdef::table[-1]{'minlen'}=[];
2027: $Apache::londefdef::table[-1]{'content'}=[];
2028: $Apache::londefdef::table[-1]{'align'}=[];
2029: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2030:
2031:
2032: }
2033: return $currentstring;
2034: }
2035:
2036: sub end_table {
2037: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2038: my $currentstring = '';
2039: if ($target eq 'web' || $target eq 'webgrade') {
2040: $currentstring = $token->[2];
2041: } elsif ($target eq 'tex') {
2042: my $inmemory = '';
2043: my $output = '';
2044: my $WARNING='';
2045: #width of columns from TeXwidth attributes
2046:
2047: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2048: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2049: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2050: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2051: }
2052: }
2053: }
2054: #free space and number of empty columns
2055: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2056: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2057: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2058: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2059: $empty_columns++;
2060: } else {
2061: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2062: }
2063: }
2064:
2065: #boundaries for contents columns
2066: my @min_len=();#columns can not be narrower
2067: my @max_len=();#maximum length of column
2068: my $avg_max;
2069: my $avg_min;
2070: my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
2071: for (my $jn=0;$jn<=$counter_cols; $jn++) {
2072: my ($localmin,$localmax)=(0,0);
2073: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2074: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2075: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2076: }
2077: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2078: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2079: }
2080: }
2081: push @min_len, $localmin;
2082: push @max_len, $localmax;
2083: $avg_max = $localmax + $avg_max;
2084: $avg_min = $localmin + $avg_min;
2085: }
2086: # Does not really matter what the average max/min are if there are no cols.
2087: # and this prevents div 0 in that case.
2088:
2089: if ($counter_cols != 0) {
2090: $avg_max = $avg_max/$counter_cols;
2091: $avg_min = $avg_min/$counter_cols;
2092: }
2093:
2094:
2095: # I don't think the below is needed.. but just in case:
2096:
2097: if ($avg_min > $avg_max) {
2098: my $temp = $avg_min;
2099: $avg_min = $avg_max;
2100: $avg_max = $temp;
2101: }
2102:
2103:
2104: for (my $jn=0;$jn<=$counter_cols;$jn++) {
2105: my $localmin=0,;
2106: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2107: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2108: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2109: }
2110: }
2111: if ($max_len[$jn]<$localmin) {
2112: $max_len[$jn]=$localmin;
2113: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2114: }#object size is bigger
2115: if ($min_len[$jn]<$localmin) {
2116: $min_len[$jn]=$localmin;
2117: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2118: }#object size is bigger
2119: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2120: $min_len[$jn]=0;
2121: $max_len[$jn]=0;
2122: }
2123: # Spans seem to be really bothered by max/min = 0. So if we have one
2124: # make it an average joe max/min.
2125:
2126: if ($max_len[$jn] == 0) {
2127: $max_len[$jn] = $avg_max;
2128: }
2129: if ($min_len[$jn] == 0) {
2130: $min_len[$jn] = $avg_min;
2131: }
2132:
2133: }
2134: #final adjustment of column width
2135: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2136: my @adjust=();
2137: #step 1. adjustment by maximum value
2138: my $space_neeeded=0;
2139: for (my $jn=0;$jn<=$#max_len;$jn++) {
2140: $space_neeeded=$space_neeeded+$max_len[$jn];
2141: }
2142: if ($space_neeeded<=$available_space) {
2143:
2144: for (my $jn=0;$jn<=$#max_len;$jn++) {
2145: if ($fwidth[$jn]==0) {
2146: $fwidth[$jn]=$max_len[$jn];
2147: }
2148: }
2149: } else {
2150: #step 2. adjustment by minimum value (estimation)
2151: $space_neeeded=0;
2152: for (my $jn=0;$jn<=$#min_len;$jn++) {
2153: $space_neeeded+=$min_len[$jn];
2154: }
2155: if ($space_neeeded>$available_space) {
2156: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2157: for (my $jn=0;$jn<=$#max_len;$jn++) {
2158: if ($fwidth[$jn]==0) {
2159: $fwidth[$jn]=$min_len[$jn];
2160: }
2161: }
2162: #check if we have objects which can be scaled
2163: my $how_many_to_scale=0;
2164: my @to_scale=();
2165: for (my $jn=0;$jn<=$#max_len;$jn++) {
2166: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2167: $how_many_to_scale++;
2168: push @to_scale, $jn;
2169: }
2170: }
2171: if ($how_many_to_scale>0) {
2172: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2173: foreach my $jn (@to_scale) {
2174: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2175: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2176: if ($1 ne '') {
2177: my $current_length=&recalc($1);
2178: $current_length=~/(\d+\.?\d*)/;
2179: $current_length=$current_length-$space_to_adjust;
2180: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2181: }
2182: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2183: if ($1 ne '') {
2184: my $current_length=$1;
2185: $current_length=$current_length-$space_to_adjust;
2186: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2187: }
2188: }
2189: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2190: }
2191: }
2192: } else {
2193: #step 3. adjustment over minimal + corrections
2194: my $enlarge_coef=$available_space/$space_neeeded;
2195: my $acsessive=0;
2196: for (my $jn=0;$jn<=$#min_len;$jn++) {
2197: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2198: if ($adjust[$jn]>$max_len[$jn]) {
2199: $fwidth[$jn]=$max_len[$jn];
2200: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2201: $adjust[$jn]=0;
2202:
2203: }
2204: }
2205: if ($acsessive>0) {
2206: #we have an excess of space and can redistribute it
2207: my $notempty_columns=0;
2208: for (my $jn=0;$jn<=$#min_len;$jn++) {
2209: if ($adjust[$jn]!=0) {
2210: $notempty_columns++;
2211: }
2212: }
2213: my $per_column=$acsessive/$notempty_columns;
2214: for (my $jn=0;$jn<=$#min_len;$jn++) {
2215: if ($adjust[$jn]!=0) {
2216: $adjust[$jn]+=$per_column;
2217: $fwidth[$jn]=$adjust[$jn];
2218: }
2219: }
2220: } else {
2221: for (my $jn=0;$jn<=$#min_len;$jn++) {
2222: $fwidth[$jn]=$adjust[$jn];
2223: }
2224: }
2225: }
2226: }
2227: # use all available width or specified width as if not specified,
2228: # the specified width gets defaulted to the available width.
2229:
2230: my $current=0;
2231: for (my $i=0;$i<=$#fwidth;$i++) {
2232: $current+=$fwidth[$i];
2233: }
2234: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2235: for (my $i=0;$i<=$#fwidth;$i++) {
2236: $fwidth[$i]*=$coef;
2237: }
2238: #removing of empty columns if allowed
2239: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2240: if ($permission eq 'yes') {
2241: my @cleaned_table=();
2242: my @cleaned_header=();
2243: my $colind=0;
2244: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2245: if ($fwidth[$jn]!=0) {
2246: #we need to copy column
2247: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2248: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2249: $cleaned_header[$colind]=$fwidth[$jn];
2250: }
2251: $colind++;
2252: }
2253: }
2254: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2255: @fwidth=@cleaned_header;
2256: }
2257:
2258:
2259: #construct header of the table
2260: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2261: for (my $in=0;$in<=$#fwidth;$in++) {
2262: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2263: }
2264: $header_of_table .= '}';
2265:
2266: #fill the table
2267: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2268: my $have_rowspan = 0;
2269: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2270:
2271: #-----------------------------------------------------------
2272: # I think this order of doing things will ensure that
2273: # single rowspan, columspan and combined row/colspans will
2274: # work correctly. LaTeX is delicate here.
2275: # RF.
2276:
2277: # Start a rowspan if necessary:
2278:
2279: my $primary_col_width = $fwidth[$jn]; # Width of primary column.
2280: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2281: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2282: #
2283: # Do the appropriate magic if this has a colspan
2284: #
2285:
2286: my $spanwidth = 0;
2287: if ($colspan > 1) {
2288: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2289: $spanwidth += $fwidth[$spancol];
2290: }
2291: $output .= '\multicolumn{'.
2292: $colspan
2293: ."}";
2294: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2295: $output .= '{|c|}{';
2296: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2297: $output .= '{|r|}{';
2298: }
2299: else {
2300: $output .= "{|p{$spanwidth mm}|}{";
2301: }
2302:
2303: } else {
2304: $spanwidth = $primary_col_width; # If no span width will be just colwidth
2305: }
2306:
2307: # Rowspan... if colspan is 1, and there's an alignment we'll need
2308: # to kick in a multicolumn in order to get the alignment spec.
2309: # this must precede the multirow or LaTex gets quite upset.
2310: # Naturally if colspan > 1 we've already done that above ^
2311: #
2312: my $multirow_aligned = 0;
2313: if ($rowspan > 1) {
2314: if ($colspan == 1) {
2315: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2316: $output .= '\multicolumn{1}{|c|}{';
2317: $multirow_aligned = 1;
2318: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2319: $output .= '\multicolumn{1}{|r|}{';
2320: $multirow_aligned = 1;
2321: }
2322: }
2323: $have_rowspan++;
2324: if ($multirow_aligned) {
2325: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2326: } else {
2327: $output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
2328: }
2329:
2330: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2331: s{^\s*\\par\s*}{};
2332: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2333: s{\s*\\vskip\s*0pt\s*$}{};
2334:
2335: #
2336: # If we did not throw in a multicolumn to align, then add
2337: # an extra {
2338: # so we close correctly without having to keep additional state
2339: # around
2340: #
2341: if (!$multirow_aligned) {
2342: $output .= '{';
2343: }
2344: }
2345: if (($rowspan eq '^') || ($rowspan eq '_')) {
2346: $have_rowspan++;
2347: }
2348: #--------------------------------------------------------------
2349:
2350:
2351: # For right and center alignment of single cells.
2352: # we are going to use a multicolumn with a span of 1 to specify alignment.
2353: #
2354: if ($colspan == 1 && $rowspan == 1) {
2355: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2356: $output .= '\multicolumn{1}{|c|}{';
2357: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2358: $output .= '\multicolumn{1}{|r|}{';
2359: }
2360: }
2361:
2362: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2363:
2364: if (($colspan == 1 && $rowspan == 1) &&
2365: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2366: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2367: $output .= '}';
2368: }
2369:
2370: # Close off any open multirow:
2371:
2372: if ($rowspan > 1) {
2373: $output .= '}}';
2374: }
2375: # Close off the colspan...
2376: #
2377: if ($colspan > 1) {
2378: $output .= '}';
2379: $jn += $colspan-1; # Adjust for number of rows really left.
2380: }
2381: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2382: }
2383: # If have_rowspan > 0, and borders are on, then
2384: # we need to do more than put an \hline at the bottom of row.
2385: # we need to do the appropriate \cline to ensure that
2386: # the spanned rows don't have \hlines through them.
2387:
2388: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2389: $output .= ' \\\\ ';
2390: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2391: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2392: if ($rowspan ne "^") {
2393: if (($rowspan <= 1) || ($rowspan eq '_')) {
2394: my $column = $jn+1;
2395: $output .= '\cline{'.$column.'-'.$column.'} ';
2396: }
2397: }
2398: }
2399:
2400: } else {
2401: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2402: }
2403: }
2404: # Note that \newline destroys alignment env's produced by e.g. <div>
2405: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2406: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2407: if ($#Apache::londefdef::table > 0) {
2408: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2409: # Figure out max/and min width by summing us and then
2410: # apply that to the current column of the table we nest in
2411: # if it's larger than the current width or the current width
2412: # is undefined.
2413: #
2414: my $min_nested_width = 0;
2415: my $max_nested_width = 0;
2416: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2417: $min_nested_width += $min_len[$col];
2418: $max_nested_width += $max_len[$col];
2419:
2420: }
2421: # Fudge in an extra 5 mm for borders etc:
2422:
2423: $min_nested_width += 5;
2424: $max_nested_width += 5;
2425:
2426: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2427: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2428: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2429: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2430: }
2431: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2432: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2433: }
2434:
2435: pop @Apache::londefdef::table;
2436: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2437: } else {
2438: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2439: pop @Apache::londefdef::table;
2440: undef @Apache::londefdef::table;
2441: }
2442: }
2443: return $currentstring;
2444: }
2445:
2446: #-- <tr> tag (end tag optional)
2447: sub start_tr {
2448: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2449: my $currentstring = '';
2450: if ($target eq 'web' || $target eq 'webgrade') {
2451: $currentstring = $token->[4];
2452: } elsif ($target eq 'tex') {
2453: $Apache::londefdef::table[-1]{'row_number'}++;
2454: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2455: if ($alignchar ne '') {
2456: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2457: } else {
2458: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2459: }
2460: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2461: #
2462: # Need to save the number of table columns to preserve the max # columns.
2463: #
2464: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2465: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2466: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2467: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2468: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2469: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2470: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2471: }
2472: return $currentstring;
2473: }
2474:
2475: sub end_tr {
2476: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2477: my $currentstring = &end_p(); # Close any pending <p> in the row.
2478: if ($target eq 'web' || $target eq 'webgrade') {
2479: $currentstring .= $token->[2];
2480: } elsif ($target eq 'tex') {
2481: if ($Apache::londefdef::TD_redirection) {
2482: &end_td_tex($parstack,$parser,$safeeval);
2483: }
2484: # Counter columns must be the maximum number of columns seen
2485: # in the table so far so:
2486: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2487: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2488: }
2489:
2490:
2491:
2492: }
2493: return $currentstring;
2494: }
2495:
2496: #-- <td> tag (end tag optional)
2497: sub start_td {
2498: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2499: my $currentstring = '';
2500: if ($target eq 'web' || $target eq 'webgrade') {
2501: $currentstring = $token->[4];
2502: } elsif ($target eq 'tex') {
2503: $Apache::londefdef::TD_redirection = 1;
2504: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2505: }
2506: return $currentstring;
2507: }
2508:
2509: sub tag_check {
2510: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2511: my @ar=@$parstack;
2512: for (my $i=$#ar-1;$i>=0;$i--) {
2513: if (lc($$tagstack[$i]) eq $good_tag) {
2514: &start_td_tex($parstack,$parser,$safeeval);
2515: last;
2516: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2517: splice @ar, $i+1;
2518: &end_td_tex(\@ar,$parser,$safeeval);
2519: &start_td_tex($parstack,$parser,$safeeval);
2520: last;
2521: }
2522: }
2523: return '';
2524: }
2525:
2526: sub start_td_tex {
2527: my ($parstack,$parser,$safeeval) = @_;
2528: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2529: if ($alignchar eq '') {
2530: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2531: }
2532: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2533: $Apache::londefdef::table[-1]{'counter_columns'}++;
2534: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2535: if (defined $TeXwidth) {
2536: my $current_length=&recalc($TeXwidth);
2537: $current_length=~/(\d+\.?\d*)/;
2538: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2539: }
2540: &Apache::lonxml::startredirection();
2541: return '';
2542: }
2543:
2544: sub end_td_tex {
2545: my ($parstack,$parser,$safeeval) = @_;
2546: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2547: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2548: my $data = &Apache::lonxml::endredirection();
2549:
2550: # The rowspan array of the table indicates which cells are part of a span.
2551: # n indicates the start of a span set of n rows.
2552: # ^ indicates a cell that continues a span set.
2553: # _ indicates the cell is at the bottom of a span set.
2554: # If this and subsequent cells are part of a rowspan, we must
2555: # push along the row until we find one that is not.
2556:
2557: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2558: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2559: # Part of a span.
2560: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2561: $current_column++;
2562: }
2563: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2564:
2565:
2566: # Get the column and row spans.
2567: # Colspan can be done via \multicolumn if I can figure out the data structs.
2568:
2569: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2570: if (!$colspan) {
2571: $colspan = 1;
2572: }
2573:
2574: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2575: if (!$rowspan) {
2576: $rowspan = 1;
2577: }
2578:
2579:
2580:
2581: for (my $c = 0; $c < $colspan; $c++) {
2582: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2583: for (my $i = 1; $i < $rowspan; $i++) {
2584: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2585: if ($i == ($rowspan-1)) {
2586: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2587: }
2588: }
2589: }
2590:
2591: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2592: if (defined $TeXwidth) {
2593: for (my $c = 0; $c < $colspan; $c++) {
2594: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2595: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2596: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2597: }
2598: } else {
2599: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2600: my $garbage_data=$data;
2601: my $fwidth=0;
2602: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2603: my $current_length=&recalc($1);
2604: $current_length=~/(\d+\.?\d*)/;
2605: if ($fwidth<$1) {$fwidth=$1;}
2606: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2607: }
2608: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2609: my $current_length=$1;
2610: if ($fwidth<$current_length) {$fwidth=$current_length;}
2611: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2612: }
2613: for (my $c = 0; $c < $colspan; $c++) {
2614: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2615: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2616: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2617: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2618: }
2619: } 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)*/) {
2620: my $garbage_data=$data;
2621: my $fwidth=0;
2622: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2623: my $current_length=&recalc($1);
2624: $current_length=~/(\d+\.?\d*)/;
2625: if ($fwidth<$1) {$fwidth=$1;}
2626: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2627: }
2628: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2629: my $current_length=&recalc($1);
2630: $current_length=~/(\d+\.?\d*)/;
2631: if ($fwidth<$1) {$fwidth=$1;}
2632: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2633: }
2634: for (my $c = 0; $c < $colspan; $c++) {
2635: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2636: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2637: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2638: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2639: }
2640: $data=~s/\\\\\s*$//;
2641: } else {
2642: $data=~s/^\s+(\S.*)/$1/;
2643: $data=~s/(.*\S)\s+$/$1/;
2644: $data=~s/(\s)+/$1/;
2645: my ($current_length,$min_length)=(0,0);
2646: if ($data=~/\\vskip/) {
2647: my $newdata=$data;
2648: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2649: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2650: foreach my $elementdata (@newdata) {
2651: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2652: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2653: my @words=split(/ /,$elementdata);
2654: foreach my $word (@words) {
2655: my $lengthword=2.5*&LATEX_length($word);
2656: if ($min_length<$lengthword) {$min_length=$lengthword;}
2657: }
2658: }
2659: } else {
2660: $current_length=2.5*&LATEX_length($data);
2661: my @words=split(/ /,$data);
2662: foreach my $word (@words) {
2663: my $lengthword=2*&LATEX_length($word);
2664: if ($min_length<$lengthword) {$min_length=$lengthword;}
2665: }
2666: }
2667: for (my $c = 0; $c < $colspan; $c++) {
2668: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2669: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2670: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2671: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2672: }
2673: }
2674: }
2675: # Substitute all of the tables nested in this cell in their appropriate places.
2676:
2677:
2678: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2679: for (my $in=0; $in<=$nested_count; $in++) {
2680: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2681: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2682: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2683: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2684:
2685: }
2686: # Should be be killing off the 'include' elements as they're used up?
2687:
2688: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2689:
2690:
2691:
2692:
2693: # the colspan array will indicate how many columns will be spanned by this
2694: # cell..this requires that counter_columns also be adjusted accordingly
2695: # so that the next bunch of text goes in the right cell. Note that since
2696: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2697: #
2698:
2699: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2700: for (my $i = 0; $i < ($colspan -1); $i++) {
2701: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2702: }
2703: for (my $r = 0; $r < $rowspan; $r++) {
2704: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2705: # Put empty text in spanned cols.
2706:
2707: }
2708:
2709:
2710:
2711: return '';
2712: }
2713:
2714: sub end_td {
2715: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2716: my $currentstring = '';
2717: if ($target eq 'web' || $target eq 'webgrade') {
2718: $currentstring = $token->[2];
2719: } elsif ($target eq 'tex') {
2720: $Apache::londefdef::TD_redirection =0;
2721: &end_td_tex($parstack,$parser,$safeeval);
2722: }
2723: return $currentstring;
2724: }
2725:
2726: #-- <th> tag (end tag optional)
2727: sub start_th {
2728: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2729: my $currentstring = '';
2730: if ($target eq 'web' || $target eq 'webgrade') {
2731: $currentstring = $token->[4];
2732: } elsif ($target eq 'tex') {
2733: $Apache::londefdef::TD_redirection = 1;
2734: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2735: }
2736: return $currentstring;
2737: }
2738:
2739: sub tagg_check {
2740: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2741: my @ar=@$parstack;
2742: for (my $i=$#ar-1;$i>=0;$i--) {
2743: if (lc($$tagstack[$i]) eq $good_tag) {
2744: &start_th_tex($parstack,$parser,$safeeval);
2745: last;
2746: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2747: splice @ar, $i+1;
2748: &end_th_tex(\@ar,$parser,$safeeval);
2749: &start_th_tex($parstack,$parser,$safeeval);
2750: last;
2751: }
2752: }
2753: return '';
2754: }
2755:
2756: sub start_th_tex {
2757: my ($parstack,$parser,$safeeval) = @_;
2758: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2759: if ($alignchar eq '') {
2760: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2761: }
2762: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2763: $Apache::londefdef::table[-1]{'counter_columns'}++;
2764: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2765: if (defined $TeXwidth) {
2766: my $current_length=&recalc($TeXwidth);
2767: $current_length=~/(\d+\.?\d*)/;
2768: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2769: }
2770: &Apache::lonxml::startredirection();
2771: return '';
2772: }
2773:
2774: sub end_th_tex {
2775: my ($parstack,$parser,$safeeval) = @_;
2776: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2777: my $data=&Apache::lonxml::endredirection();
2778: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2779: if (defined $TeXwidth) {
2780: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2781: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2782: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2783: } else {
2784: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2785: my $garbage_data=$data;
2786: my $fwidth=0;
2787: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2788: my $current_length=&recalc($1);
2789: $current_length=~/(\d+\.?\d*)/;
2790: if ($fwidth<$1) {$fwidth=$1;}
2791: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2792: }
2793: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2794: my $current_length=$1;
2795: if ($fwidth<$current_length) {$fwidth=$current_length;}
2796: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2797: }
2798: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2799: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2800: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2801: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2802: } else {
2803: $data=~s/^\s+(\S.*)/$1/;
2804: $data=~s/(.*\S)\s+$/$1/;
2805: $data=~s/(\s)+/$1/;
2806: my ($current_length,$min_length)=(0,0);
2807: if ($data=~/\\vskip/) {
2808: my $newdata=$data;
2809: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2810: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2811: foreach my $elementdata (@newdata) {
2812: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2813: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2814: my @words=split(/ /,$elementdata);
2815: foreach my $word (@words) {
2816: my $lengthword=2.5*&LATEX_length($word);
2817: if ($min_length<$lengthword) {$min_length=$lengthword;}
2818: }
2819: }
2820: } else {
2821: $current_length=2.5*&LATEX_length($data);
2822: my @words=split(/ /,$data);
2823: foreach my $word (@words) {
2824: my $lengthword=2*&LATEX_length($word);
2825: if ($min_length<$lengthword) {$min_length=$lengthword;}
2826: }
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'}] },'0';
2830: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2831: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2832: }
2833: }
2834: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2835: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2836: }
2837: #make data bold
2838: $data='\textbf{'.$data.'}';
2839: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2840: return'';
2841: }
2842:
2843: sub end_th {
2844: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2845: my $currentstring = &end_p(); # Close any open <p> in the row.
2846: if ($target eq 'web' || $target eq 'webgrade') {
2847: $currentstring .= $token->[2];
2848: } elsif ($target eq 'tex') {
2849: $Apache::londefdef::TD_redirection =0;
2850: &end_th_tex($parstack,$parser,$safeeval);
2851: }
2852: return $currentstring;
2853: }
2854:
2855: #-- <img> tag (end tag forbidden)
2856: #
2857: # Render the <IMG> tag.
2858: # <IMG> has the following attributes (in addition to the
2859: # standard HTML ones:
2860: # TeXwrap - Governs how the tex target will try to wrap text around
2861: # horizontally aligned images.
2862: # TeXwidth - The width of the image when rendered for print (mm).
2863: # TeXheight - The height of the image when rendered for print (mm)
2864: # (Note there seems to also be support for this as a % of page size)
2865: #
2866: sub start_img {
2867: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2868: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2869: undef,1);
2870: if (! $src &&
2871: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2872: ) {
2873: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2874: return '';
2875: }
2876: &Apache::lonxml::extlink($src);
2877: my $currentstring = '';
2878: my $scaling = .3;
2879:
2880: # Render unto browsers that which are the browser's...
2881:
2882: if ($target eq 'web' || $target eq 'webgrade') {
2883: if ($env{'browser.imagesuppress'} ne 'on') {
2884: my $enc = ('yes' eq
2885: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2886: $safeeval)));
2887: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2888: $enc);
2889: } else {
2890: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2891: undef,1);
2892: if (!$alttag) {
2893: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2894: $src);
2895: }
2896: $currentstring.='[IMAGE: '.$alttag.']';
2897: }
2898:
2899: # and render unto TeX that which is LaTeX
2900:
2901: } elsif ($target eq 'tex') {
2902: #
2903: # The alignment will require some superstructure to be put around
2904: # the \includegraphics stuff. At present we can only partially
2905: # simulate the alignments offered by html.
2906: #
2907: #
2908: my $align = lc(&Apache::lonxml::get_param('align',
2909: $parstack,
2910: $safeeval,
2911: undef,1));
2912: if(!$align) {
2913: $align = "bottom"; # This is html's default so it's ours too.
2914: }
2915: #
2916: &Apache::lonxml::debug("Alignemnt = $align");
2917: # LaTeX's image/text wrapping is really bad since it wants to
2918: # make figures float.
2919: # The user has the optional parameter (applicable only to l/r
2920: # alignment to use the picins/parpic directive to get wrapped text
2921: # this is also imperfect.. that's why we give them a choice...
2922: # so they can't yell at us for our choice.
2923: #
2924: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2925: $parstack,
2926: $safeeval,
2927: undef,0);
2928: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2929: if(!$latex_rendering) {
2930: $latex_rendering = "texwrap";
2931: }
2932: # using texwrap inside a table does not work. So, if after all of this,
2933: # texwrap is on, we turn it off if we detect we're in a table:
2934: #
2935: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2936: $latex_rendering = 'parpic';
2937: }
2938:
2939: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2940:
2941: #if original gif/jpg/png file exist do following:
2942: my $origsrc=$src;
2943: my ($path,$file) = &get_eps_image($src);
2944: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2945: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2946: &Apache::lonxml::debug("path = $path file = $file src = $src");
2947: if (-e $src) {
2948: &Apache::lonxml::debug("$src exists");
2949: my ($height_param,$width_param)=
2950: &image_size($origsrc,0.3,$parstack,$safeeval);
2951: my $size;
2952: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2953: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2954: # Default size if not able to extract that (e.g. eps image).
2955:
2956: # &Apache::lonnet::logthis("Size = $size");
2957:
2958: $size='['.$size;
2959: $size=~s/,$/]/;
2960: $currentstring .= '\graphicspath{{'.$path.'}}'
2961: .'\includegraphics'.$size.'{'.$file.'} ';
2962: my $closure;
2963: ($currentstring, $closure) = &align_latex_image($align,
2964: $latex_rendering,
2965: $currentstring,
2966: $width_param,
2967: $height_param);
2968: $currentstring .= $closure;
2969:
2970: } else {
2971: &Apache::lonxml::debug("$src does not exist");
2972: #original image file doesn't exist so check the alt attribute
2973: my $alt =
2974: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2975: unless ($alt) {
2976: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2977: }
2978:
2979: if ($alt) { $currentstring .= ' '.$alt.' '; }
2980: }
2981:
2982: # And here's where the semi-quote breaks down: allow the user
2983: # to edit the beast as well by rendering the problem for edit:
2984: } elsif ($target eq 'edit') {
2985: $currentstring .=&Apache::edit::tag_start($target,$token);
2986: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2987: &Apache::edit::browse('src',undef,'alt').' '.
2988: &Apache::edit::search('src',undef,'alt').'<br />';
2989: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2990: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2991: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2992: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2993: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2994: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2995: ['','bottom','middle','top','left','right'],$token,5);
2996: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2997: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
2998: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2999: ['no','yes'], $token, 2);
3000: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
3001: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
3002: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
3003: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
3004: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
3005:
3006:
3007: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
3008: if ($width) { $currentstring.=' width="'.$width.'" '; }
3009: if ($height) { $currentstring.=' height="'.$height.'" '; }
3010: $currentstring .= ' />';
3011: } elsif ($target eq 'modified') {
3012: my ($osrc,$owidth,$oheight)=
3013: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3014: my $ctag=&Apache::edit::get_new_args($token,$parstack,
3015: $safeeval,'src','alt','align',
3016: 'TeXwidth','TeXheight', 'TeXwrap',
3017: 'width','height','encrypturl');
3018: my ($nsrc,$nwidth,$nheight)=
3019: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
3020: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
3021: &image_replication($loc);
3022: my ($iwidth,$iheight);
3023: if (-e $loc) {
3024: my $image = Image::Magick->new;
3025: $image->Read($loc);
3026: ($iwidth, $iheight) = ($image->Get('width'),
3027: $image->Get('height'));
3028: }
3029: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
3030: # changed image or no size specified,
3031: # if they didn't explicitly change the
3032: # width or height use the ones from the image
3033: if ($iwidth && $iheight) {
3034: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
3035: $token->[2]{'width'} = $iwidth;$ctag=1;
3036: }
3037: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
3038: $token->[2]{'height'}=$iheight;$ctag=1;
3039: }
3040: }
3041: }
3042: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
3043: # if we don't have a width or height
3044: if ($iwidth && $cwidth && !$cheight) {
3045: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
3046: }
3047: if ($iheight && $cheight && !$cwidth) {
3048: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
3049: }
3050: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3051: }
3052:
3053: return $currentstring;
3054: }
3055:
3056: sub end_img {
3057: my ($target,$token) = @_;
3058: my $currentstring = '';
3059: if ($target eq 'web' || $target eq 'webgrade') {
3060: $currentstring = $token->[2];
3061: } elsif ($target eq 'tex') {
3062: $currentstring = '';
3063: }
3064: return $currentstring;
3065: }
3066:
3067: #-- <applet> tag (end tag required)
3068: sub start_applet {
3069: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3070:
3071: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3072: &Apache::lonxml::extlink($code);
3073: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3074: undef,1);
3075: &Apache::lonxml::extlink($archive);
3076: my $currentstring = '';
3077: if ($target eq 'web' || $target eq 'webgrade') {
3078: if ($env{'browser.appletsuppress'} ne 'on') {
3079: $currentstring = &Apache::lonenc::encrypt_ref($token,
3080: {'code'=>$code,
3081: 'archive'=>$archive}
3082: );
3083: } else {
3084: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3085: $safeeval,undef,1);
3086: unless ($alttag) {
3087: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3088: $code);
3089: }
3090: $currentstring='[APPLET: '.$alttag.']';
3091: }
3092: } elsif ($target eq 'tex') {
3093: # Turn off some stuff we can't be inside thank you LaTeX
3094:
3095:
3096: my $restart_sub = 0;
3097: my $restart_sup = 0;
3098:
3099: # Since <sub> and <sup> are simple tags it's ok to turn off/on
3100: # using the start_ stop_ functions.. those tags only care about
3101: # $target.
3102:
3103: if (&is_inside_of($tagstack, "sub")) {
3104: $restart_sub = 1;
3105: $currentstring .= &end_sub($target, $token, $tagstack,
3106: $parstack, $parser, $safeeval);
3107: }
3108: if (&is_inside_of($tagstack, "sup")) {
3109: $restart_sup = 1;
3110: $currentstring .= &end_sup($target, $token, $tagstack,
3111: $parstack, $parser, $safeeval);
3112: }
3113:
3114: # Now process the applet; just replace it with its alt attribute.
3115:
3116: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3117: $safeeval,undef,1);
3118: unless ($alttag) {
3119: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3120: undef,1);
3121: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3122: $code);
3123: }
3124: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3125: '.}\end{center}';
3126:
3127: # Turn stuff back on that we can't be inside of.
3128:
3129: if ($restart_sub) {
3130: $currentstring .= &start_sub($target, $token, $tagstack,
3131: $parstack, $parser, $safeeval);
3132: }
3133: if ($restart_sup) {
3134: $currentstring .= &start_sup($target, $token, $tagstack,
3135: $parstack, $parser, $safeeval);
3136: }
3137: }
3138: return $currentstring;
3139: }
3140:
3141: sub end_applet {
3142: my ($target,$token) = @_;
3143: my $currentstring = '';
3144: if ($target eq 'web' || $target eq 'webgrade') {
3145: $currentstring = $token->[2];
3146: } elsif ($target eq 'tex') {
3147: }
3148: return $currentstring;
3149: }
3150:
3151: #-- <embed> tag (end tag optional/required)
3152: sub start_embed {
3153: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3154: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3155: &Apache::lonxml::extlink($src);
3156: my $currentstring = '';
3157: if ($target eq 'web' || $target eq 'webgrade') {
3158: if ($env{'browser.embedsuppress'} ne 'on') {
3159: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3160: } else {
3161: my $alttag=&Apache::lonxml::get_param
3162: ('alt',$parstack,$safeeval,undef,1);
3163: unless ($alttag) {
3164: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3165: }
3166: $currentstring='[EMBED: '.$alttag.']';
3167: }
3168: } elsif ($target eq 'tex') {
3169: }
3170: return $currentstring;
3171: }
3172:
3173: sub end_embed {
3174: my ($target,$token) = @_;
3175: my $currentstring = '';
3176: if ($target eq 'web' || $target eq 'webgrade') {
3177: $currentstring = $token->[2];
3178: } elsif ($target eq 'tex') {
3179: }
3180: return $currentstring;
3181: }
3182:
3183: #-- <param> tag (end tag forbidden)
3184: sub start_param {
3185: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3186: if (&Apache::lonxml::get_param('name',$parstack,
3187: $safeeval,undef,1)=~/^cabbase$/i) {
3188: my $value=&Apache::lonxml::get_param('value',$parstack,
3189: $safeeval,undef,1);
3190: &Apache::lonxml::extlink($value);
3191: }
3192:
3193: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3194: &Apache::lonxml::extlink($src);
3195: my $currentstring = '';
3196: if ($target eq 'web' || $target eq 'webgrade') {
3197: my %toconvert;
3198: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3199: if ($src) { $toconvert{'src'}= $src; }
3200: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3201: undef,1);
3202: if ($name=~/^cabbase$/i) {
3203: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3204: $safeeval,undef,1);
3205: }
3206: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3207: } elsif ($target eq 'tex') {
3208: }
3209: return $currentstring;
3210: }
3211:
3212: sub end_param {
3213: my ($target,$token) = @_;
3214: my $currentstring = '';
3215: if ($target eq 'web' || $target eq 'webgrade') {
3216: $currentstring = $token->[2];
3217: } elsif ($target eq 'tex') {
3218: }
3219: return $currentstring;
3220: }
3221:
3222: #-- <allow> tag
3223: sub start_allow {
3224: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3225: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3226: &Apache::lonxml::extlink($src);
3227:
3228: if ($target eq 'tex') { &image_replication($src); }
3229: my $result;
3230: if ($target eq 'edit') {
3231: $result .=&Apache::edit::tag_start($target,$token);
3232: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3233: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3234: } elsif ($target eq 'modified') {
3235: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3236: $safeeval,'src');
3237: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3238: }
3239: return $result;
3240: }
3241:
3242: sub end_allow {
3243: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3244: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3245: return '';
3246: }
3247:
3248: #-- Frames (end tag required)
3249: #-- <frameset>
3250: sub start_frameset {
3251: my ($target,$token) = @_;
3252: my $currentstring = ''; # Close any pending para.
3253: if ($target eq 'web' || $target eq 'webgrade') {
3254: $currentstring =
3255: &Apache::loncommon::start_page($Apache::londefdef::title,
3256: $Apache::londefdef::head,
3257: {'add_entries' => $token->[2],
3258: 'no_title' => 1,
3259: 'force_register' => 1,
3260: 'frameset' => 1,});
3261:
3262: }
3263: return $currentstring;
3264: }
3265:
3266: sub end_frameset {
3267: my ($target,$token) = @_;
3268: my $currentstring = '';
3269: if ($target eq 'web' || $target eq 'webgrade') {
3270: $currentstring = $token->[2];
3271: }
3272: return $currentstring;
3273: }
3274:
3275: #-- <xmp> (end tag required)
3276: sub start_xmp {
3277: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3278: my $currentstring = '';
3279: if ($target eq 'web' || $target eq 'webgrade') {
3280: $currentstring .= $token->[4];
3281: } elsif ($target eq 'tex') {
3282: $currentstring .= '\begin{verbatim}';
3283: }
3284: return $currentstring;
3285: }
3286:
3287: sub end_xmp {
3288: my ($target,$token) = @_;
3289: my $currentstring = '';
3290: if ($target eq 'web' || $target eq 'webgrade') {
3291: $currentstring .= $token->[2];
3292: } elsif ($target eq 'tex') {
3293: $currentstring .= '\end{verbatim}';
3294: }
3295: return $currentstring;
3296: }
3297:
3298: #-- <pre> (end tag required)
3299: sub start_pre {
3300: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3301: my $currentstring = &end_p(); # close off pending <p>
3302: if ($target eq 'web' || $target eq 'webgrade') {
3303: $currentstring .= $token->[4];
3304: } elsif ($target eq 'tex') {
3305: $currentstring .= '\begin{verbatim}';
3306: &Apache::lonxml::disable_LaTeX_substitutions();
3307: }
3308: return $currentstring;
3309: }
3310:
3311: sub end_pre {
3312: my ($target,$token) = @_;
3313: my $currentstring = '';
3314: if ($target eq 'web' || $target eq 'webgrade') {
3315: $currentstring .= $token->[2];
3316: } elsif ($target eq 'tex') {
3317: $currentstring .= '\end{verbatim}';
3318: &Apache::lonxml::enable_LaTeX_substitutions();
3319: }
3320: return $currentstring;
3321: }
3322:
3323: #-- <insert>
3324: sub start_insert {
3325: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3326: my $currentstring = '';
3327: if ($target eq 'web' || $target eq 'webgrade') {
3328: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3329: $currentstring .= '<b>'.$display.'</b>';;
3330: }
3331: return $currentstring;
3332: }
3333:
3334: sub end_insert {
3335: my ($target,$token) = @_;
3336: my $currentstring = '';
3337: if ($target eq 'web' || $target eq 'webgrade') {
3338: $currentstring .= '';
3339: }
3340: return $currentstring;
3341: }
3342:
3343: #-- <externallink>
3344: sub start_externallink {
3345: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3346: my $currentstring = '';
3347: if ($target eq 'web' || $target eq 'webgrade') {
3348: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3349: $currentstring .= '<b>'.$display.'</b>';;
3350: }
3351: return $currentstring;
3352: }
3353:
3354: sub end_externallink {
3355: my ($target,$token) = @_;
3356: my $currentstring = '';
3357: if ($target eq 'web' || $target eq 'webgrade') {
3358: $currentstring .= '';
3359: }
3360: return $currentstring;
3361: }
3362:
3363: #-- <blankspace heigth="">
3364: sub start_blankspace {
3365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3366: my $currentstring = &end_p(); # closes off any unclosed <p>
3367: if ($target eq 'tex') {
3368: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3369: $currentstring .= '\vskip '.$howmuch.' ';
3370: }
3371: return $currentstring;
3372: }
3373:
3374: sub end_blankspace {
3375: my ($target,$token) = @_;
3376: my $currentstring = '';
3377: if ($target eq 'tex') {
3378: $currentstring .= '';
3379: }
3380: return $currentstring;
3381: }
3382:
3383: #-- <abbr> tag (end tag required)
3384: sub start_abbr {
3385: my ($target,$token) = @_;
3386: my $currentstring = '';
3387: if ($target eq 'web' || $target eq 'webgrade') {
3388: $currentstring = $token->[4];
3389: }
3390: return $currentstring;
3391: }
3392:
3393: sub end_abbr {
3394: my ($target,$token) = @_;
3395: my $currentstring = '';
3396: if ($target eq 'web' || $target eq 'webgrade') {
3397: $currentstring = $token->[2];
3398: }
3399: return $currentstring;
3400: }
3401:
3402: #-- <acronym> tag (end tag required)
3403: sub start_acronym {
3404: my ($target,$token) = @_;
3405: my $currentstring = '';
3406: if ($target eq 'web' || $target eq 'webgrade') {
3407: $currentstring = $token->[4];
3408: }
3409: return $currentstring;
3410: }
3411:
3412: sub end_acronym {
3413: my ($target,$token) = @_;
3414: my $currentstring = '';
3415: if ($target eq 'web' || $target eq 'webgrade') {
3416: $currentstring = $token->[2];
3417: }
3418: return $currentstring;
3419: }
3420:
3421: #-- <area> tag (end tag forbidden)
3422: sub start_area {
3423: my ($target,$token) = @_;
3424: my $currentstring = '';
3425: if ($target eq 'web' || $target eq 'webgrade') {
3426: $currentstring = $token->[4];
3427: }
3428: return $currentstring;
3429: }
3430:
3431: sub end_area {
3432: my ($target,$token) = @_;
3433: my $currentstring = '';
3434: if ($target eq 'web' || $target eq 'webgrade') {
3435: $currentstring = $token->[2];
3436: }
3437: return $currentstring;
3438: }
3439:
3440: #-- <base> tag (end tag forbidden)
3441: sub start_base {
3442: my ($target,$token) = @_;
3443: my $currentstring = '';
3444: if ($target eq 'web' || $target eq 'webgrade') {
3445: $currentstring = $token->[4];
3446: }
3447: return $currentstring;
3448: }
3449:
3450: sub end_base {
3451: my ($target,$token) = @_;
3452: my $currentstring = '';
3453: if ($target eq 'web' || $target eq 'webgrade') {
3454: $currentstring = $token->[2];
3455: }
3456: return $currentstring;
3457: }
3458:
3459: #-- <bdo> tag (end tag required)
3460: sub start_bdo {
3461: my ($target,$token) = @_;
3462: my $currentstring = '';
3463: if ($target eq 'web' || $target eq 'webgrade') {
3464: $currentstring = $token->[4];
3465: }
3466: return $currentstring;
3467: }
3468:
3469: sub end_bdo {
3470: my ($target,$token) = @_;
3471: my $currentstring = '';
3472: if ($target eq 'web' || $target eq 'webgrade') {
3473: $currentstring = $token->[2];
3474: }
3475: return $currentstring;
3476: }
3477:
3478: #-- <bgsound> tag (end tag optional)
3479: sub start_bgsound {
3480: my ($target,$token) = @_;
3481: my $currentstring = '';
3482: if ($target eq 'web' || $target eq 'webgrade') {
3483: $currentstring = $token->[4];
3484: }
3485: return $currentstring;
3486: }
3487:
3488: sub end_bgsound {
3489: my ($target,$token) = @_;
3490: my $currentstring = '';
3491: if ($target eq 'web' || $target eq 'webgrade') {
3492: $currentstring = $token->[2];
3493: }
3494: return $currentstring;
3495: }
3496:
3497: #-- <blink> tag (end tag required)
3498: sub start_blink {
3499: my ($target,$token) = @_;
3500: my $currentstring = '';
3501: if ($target eq 'web' || $target eq 'webgrade') {
3502: $currentstring = $token->[4];
3503: }
3504: return $currentstring;
3505: }
3506:
3507: sub end_blink {
3508: my ($target,$token) = @_;
3509: my $currentstring = '';
3510: if ($target eq 'web' || $target eq 'webgrade') {
3511: $currentstring = $token->[2];
3512: }
3513: return $currentstring;
3514: }
3515:
3516: #-- <blockquote> tag (end tag required)
3517: sub start_blockquote {
3518: my ($target,$token) = @_;
3519: my $currentstring = &end_p(); # Close any unclosed <p>
3520: if ($target eq 'web' || $target eq 'webgrade') {
3521: $currentstring .= $token->[4];
3522: }
3523: if ($target eq 'tex') {
3524: $currentstring .= '\begin{quote}';
3525: }
3526: return $currentstring;
3527: }
3528:
3529: sub end_blockquote {
3530: my ($target,$token) = @_;
3531: my $currentstring = '';
3532: if ($target eq 'web' || $target eq 'webgrade') {
3533: $currentstring = $token->[2];
3534: }
3535: if ($target eq 'tex') {
3536: $currentstring = '\end{quote}';
3537: }
3538: return $currentstring;
3539: }
3540:
3541: #-- <button> tag (end tag required)
3542: sub start_button {
3543: my ($target,$token) = @_;
3544: my $currentstring = '';
3545: if ($target eq 'web' || $target eq 'webgrade') {
3546: $currentstring = $token->[4];
3547: }
3548: return $currentstring;
3549: }
3550:
3551: sub end_button {
3552: my ($target,$token) = @_;
3553: my $currentstring = '';
3554: if ($target eq 'web' || $target eq 'webgrade') {
3555: $currentstring = $token->[2];
3556: }
3557: return $currentstring;
3558: }
3559:
3560: #-- <caption> tag (end tag required)
3561: sub start_caption {
3562: my ($target,$token) = @_;
3563: my $currentstring = '';
3564: if ($target eq 'web' || $target eq 'webgrade') {
3565: $currentstring = $token->[4];
3566: }
3567: return $currentstring;
3568: }
3569:
3570: sub end_caption {
3571: my ($target,$token) = @_;
3572: my $currentstring = '';
3573: if ($target eq 'web' || $target eq 'webgrade') {
3574: $currentstring = $token->[2];
3575: }
3576: return $currentstring;
3577: }
3578:
3579: #-- <col> tag (end tag forbdden)
3580: sub start_col {
3581: my ($target,$token) = @_;
3582: my $currentstring = '';
3583: if ($target eq 'web' || $target eq 'webgrade') {
3584: $currentstring = $token->[4];
3585: }
3586: return $currentstring;
3587: }
3588:
3589: sub end_col {
3590: my ($target,$token) = @_;
3591: my $currentstring = '';
3592: if ($target eq 'web' || $target eq 'webgrade') {
3593: $currentstring = $token->[2];
3594: }
3595: return $currentstring;
3596: }
3597:
3598: #-- <colgroup> tag (end tag optional)
3599: sub start_colgroup {
3600: my ($target,$token) = @_;
3601: my $currentstring = '';
3602: if ($target eq 'web' || $target eq 'webgrade') {
3603: $currentstring = $token->[4];
3604: }
3605: return $currentstring;
3606: }
3607:
3608: sub end_colgroup {
3609: my ($target,$token) = @_;
3610: my $currentstring = '';
3611: if ($target eq 'web' || $target eq 'webgrade') {
3612: $currentstring = $token->[2];
3613: }
3614: return $currentstring;
3615: }
3616:
3617: #-- <del> tag (end tag required)
3618: sub start_del {
3619: my ($target,$token) = @_;
3620: my $currentstring = '';
3621: if ($target eq 'web' || $target eq 'webgrade') {
3622: $currentstring = $token->[4];
3623: }
3624: return $currentstring;
3625: }
3626:
3627: sub end_del {
3628: my ($target,$token) = @_;
3629: my $currentstring = '';
3630: if ($target eq 'web' || $target eq 'webgrade') {
3631: $currentstring = $token->[2];
3632: }
3633: return $currentstring;
3634: }
3635:
3636: #-- <fieldset> tag (end tag required)
3637: sub start_fieldset {
3638: my ($target,$token) = @_;
3639: my $currentstring = '';
3640: if ($target eq 'web' || $target eq 'webgrade') {
3641: $currentstring = $token->[4];
3642: }
3643: return $currentstring;
3644: }
3645:
3646: sub end_fieldset {
3647: my ($target,$token) = @_;
3648: my $currentstring = '';
3649: if ($target eq 'web' || $target eq 'webgrade') {
3650: $currentstring = $token->[2];
3651: }
3652: return $currentstring;
3653: }
3654:
3655: #-- <frame> tag (end tag forbidden)
3656: sub start_frame {
3657: my ($target,$token) = @_;
3658: my $currentstring = '';
3659: if ($target eq 'web' || $target eq 'webgrade') {
3660: $currentstring = $token->[4];
3661: }
3662: return $currentstring;
3663: }
3664:
3665: sub end_frame {
3666: my ($target,$token) = @_;
3667: my $currentstring = '';
3668: if ($target eq 'web' || $target eq 'webgrade') {
3669: $currentstring = $token->[2];
3670: }
3671: return $currentstring;
3672: }
3673:
3674: #-- <iframe> tag (end tag required)
3675: sub start_iframe {
3676: my ($target,$token) = @_;
3677: my $currentstring = '';
3678: if ($target eq 'web' || $target eq 'webgrade') {
3679: $currentstring = $token->[4];
3680: }
3681: return $currentstring;
3682: }
3683:
3684: sub end_iframe {
3685: my ($target,$token) = @_;
3686: my $currentstring = '';
3687: if ($target eq 'web' || $target eq 'webgrade') {
3688: $currentstring = $token->[2];
3689: }
3690: return $currentstring;
3691: }
3692:
3693: #-- <ins> tag (end tag required)
3694: sub start_ins {
3695: my ($target,$token) = @_;
3696: my $currentstring = '';
3697: if ($target eq 'web' || $target eq 'webgrade') {
3698: $currentstring = $token->[4];
3699: }
3700: return $currentstring;
3701: }
3702:
3703: sub end_ins {
3704: my ($target,$token) = @_;
3705: my $currentstring = '';
3706: if ($target eq 'web' || $target eq 'webgrade') {
3707: $currentstring = $token->[2];
3708: }
3709: return $currentstring;
3710: }
3711:
3712: #-- <isindex> tag (end tag forbidden)
3713: sub start_isindex {
3714: my ($target,$token) = @_;
3715: my $currentstring = '';
3716: if ($target eq 'web' || $target eq 'webgrade') {
3717: $currentstring = $token->[4];
3718: }
3719: return $currentstring;
3720: }
3721:
3722: sub end_isindex {
3723: my ($target,$token) = @_;
3724: my $currentstring = '';
3725: if ($target eq 'web' || $target eq 'webgrade') {
3726: $currentstring = $token->[2];
3727: }
3728: return $currentstring;
3729: }
3730:
3731: #-- <keygen> tag (end tag forbidden)
3732: sub start_keygen {
3733: my ($target,$token) = @_;
3734: my $currentstring = '';
3735: if ($target eq 'web' || $target eq 'webgrade') {
3736: $currentstring = $token->[4];
3737: }
3738: return $currentstring;
3739: }
3740:
3741: sub end_keygen {
3742: my ($target,$token) = @_;
3743: my $currentstring = '';
3744: if ($target eq 'web' || $target eq 'webgrade') {
3745: $currentstring = $token->[2];
3746: }
3747: return $currentstring;
3748: }
3749:
3750: #-- <label> tag
3751: sub start_label {
3752: my ($target,$token) = @_;
3753: my $currentstring = '';
3754: if ($target eq 'web' || $target eq 'webgrade') {
3755: $currentstring = $token->[4];
3756: }
3757: return $currentstring;
3758: }
3759:
3760: sub end_label {
3761: my ($target,$token) = @_;
3762: my $currentstring = '';
3763: if ($target eq 'web' || $target eq 'webgrade') {
3764: $currentstring = $token->[2];
3765: }
3766: return $currentstring;
3767: }
3768:
3769: #-- <layer> tag (end tag required)
3770: sub start_layer {
3771: my ($target,$token) = @_;
3772: my $currentstring = '';
3773: if ($target eq 'web' || $target eq 'webgrade') {
3774: $currentstring = $token->[4];
3775: }
3776: return $currentstring;
3777: }
3778:
3779: sub end_layer {
3780: my ($target,$token) = @_;
3781: my $currentstring = '';
3782: if ($target eq 'web' || $target eq 'webgrade') {
3783: $currentstring = $token->[2];
3784: }
3785: return $currentstring;
3786: }
3787:
3788: #-- <legend> tag (end tag required)
3789: sub start_legend {
3790: my ($target,$token) = @_;
3791: my $currentstring = '';
3792: if ($target eq 'web' || $target eq 'webgrade') {
3793: $currentstring = $token->[4];
3794: }
3795: return $currentstring;
3796: }
3797:
3798: sub end_legend {
3799: my ($target,$token) = @_;
3800: my $currentstring = '';
3801: if ($target eq 'web' || $target eq 'webgrade') {
3802: $currentstring = $token->[2];
3803: }
3804: return $currentstring;
3805: }
3806:
3807: #-- <link> tag (end tag forbidden)
3808: sub start_link {
3809: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3810: my $currentstring = '';
3811: if ($target eq 'web' || $target eq 'webgrade') {
3812: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3813: undef,1);
3814: &Apache::lonxml::extlink($href);
3815: $currentstring = $token->[4];
3816: }
3817: return $currentstring;
3818: }
3819:
3820: sub end_link {
3821: my ($target,$token) = @_;
3822: my $currentstring = '';
3823: if ($target eq 'web' || $target eq 'webgrade') {
3824: $currentstring = $token->[2];
3825: }
3826: return $currentstring;
3827: }
3828:
3829: #-- <marquee> tag (end tag optional)
3830: sub start_marquee {
3831: my ($target,$token) = @_;
3832: my $currentstring = '';
3833: if ($target eq 'web' || $target eq 'webgrade') {
3834: $currentstring = $token->[4];
3835: }
3836: return $currentstring;
3837: }
3838:
3839: sub end_marquee {
3840: my ($target,$token) = @_;
3841: my $currentstring = '';
3842: if ($target eq 'web' || $target eq 'webgrade') {
3843: $currentstring = $token->[2];
3844: }
3845: return $currentstring;
3846: }
3847:
3848: #-- <multicol> tag (end tag required)
3849: sub start_multicol {
3850: my ($target,$token) = @_;
3851: my $currentstring = &end_p(); # Close any pending <p>
3852: if ($target eq 'web' || $target eq 'webgrade') {
3853: $currentstring .= $token->[4];
3854: }
3855: return $currentstring;
3856: }
3857:
3858: sub end_multicol {
3859: my ($target,$token) = @_;
3860: my $currentstring = '';
3861: if ($target eq 'web' || $target eq 'webgrade') {
3862: $currentstring = $token->[2];
3863: }
3864: return $currentstring;
3865: }
3866:
3867: #-- <nobr> tag (end tag required)
3868: sub start_nobr {
3869: my ($target,$token) = @_;
3870: my $currentstring = '';
3871: if ($target eq 'web' || $target eq 'webgrade') {
3872: $currentstring = $token->[4];
3873: } elsif ($target eq 'tex') {
3874: $currentstring='\mbox{';
3875: }
3876: return $currentstring;
3877: }
3878:
3879: sub end_nobr {
3880: my ($target,$token) = @_;
3881: my $currentstring = '';
3882: if ($target eq 'web' || $target eq 'webgrade') {
3883: $currentstring = $token->[2];
3884: } elsif ($target eq 'tex') {
3885: $currentstring='}';
3886: }
3887: return $currentstring;
3888: }
3889:
3890: #-- <noembed> tag (end tag required)
3891: sub start_noembed {
3892: my ($target,$token) = @_;
3893: my $currentstring = '';
3894: if ($target eq 'web' || $target eq 'webgrade') {
3895: $currentstring = $token->[4];
3896: }
3897: return $currentstring;
3898: }
3899:
3900: sub end_noembed {
3901: my ($target,$token) = @_;
3902: my $currentstring = '';
3903: if ($target eq 'web' || $target eq 'webgrade') {
3904: $currentstring = $token->[2];
3905: }
3906: return $currentstring;
3907: }
3908:
3909: #-- <noframes> tag (end tag required)
3910: sub start_noframes {
3911: my ($target,$token) = @_;
3912: my $currentstring = '';
3913: if ($target eq 'web' || $target eq 'webgrade') {
3914: $currentstring = $token->[4];
3915: }
3916: return $currentstring;
3917: }
3918:
3919: sub end_noframes {
3920: my ($target,$token) = @_;
3921: my $currentstring = '';
3922: if ($target eq 'web' || $target eq 'webgrade') {
3923: $currentstring = $token->[2];
3924: }
3925: return $currentstring;
3926: }
3927:
3928: #-- <nolayer> tag (end tag required)
3929: sub start_nolayer {
3930: my ($target,$token) = @_;
3931: my $currentstring = '';
3932: if ($target eq 'web' || $target eq 'webgrade') {
3933: $currentstring = $token->[4];
3934: }
3935: return $currentstring;
3936: }
3937:
3938: sub end_nolayer {
3939: my ($target,$token) = @_;
3940: my $currentstring = '';
3941: if ($target eq 'web' || $target eq 'webgrade') {
3942: $currentstring = $token->[2];
3943: }
3944: return $currentstring;
3945: }
3946:
3947: #-- <noscript> tag (end tag required)
3948: sub start_noscript {
3949: my ($target,$token) = @_;
3950: my $currentstring = '';
3951: if ($target eq 'web' || $target eq 'webgrade') {
3952: $currentstring = $token->[4];
3953: }
3954: return $currentstring;
3955: }
3956:
3957: sub end_noscript {
3958: my ($target,$token) = @_;
3959: my $currentstring = '';
3960: if ($target eq 'web' || $target eq 'webgrade') {
3961: $currentstring = $token->[2];
3962: }
3963: return $currentstring;
3964: }
3965:
3966: #-- <object> tag (end tag required)
3967: sub start_object {
3968: my ($target,$token) = @_;
3969: my $currentstring = '';
3970: if ($target eq 'web' || $target eq 'webgrade') {
3971: $currentstring = $token->[4];
3972: }
3973: return $currentstring;
3974: }
3975:
3976: sub end_object {
3977: my ($target,$token) = @_;
3978: my $currentstring = '';
3979: if ($target eq 'web' || $target eq 'webgrade') {
3980: $currentstring = $token->[2];
3981: }
3982: return $currentstring;
3983: }
3984:
3985: #-- <optgroup> tag (end tag required)
3986: sub start_optgroup {
3987: my ($target,$token) = @_;
3988: my $currentstring = '';
3989: if ($target eq 'web' || $target eq 'webgrade') {
3990: $currentstring = $token->[4];
3991: }
3992: return $currentstring;
3993: }
3994:
3995: sub end_optgroup {
3996: my ($target,$token) = @_;
3997: my $currentstring = '';
3998: if ($target eq 'web' || $target eq 'webgrade') {
3999: $currentstring = $token->[2];
4000: }
4001: return $currentstring;
4002: }
4003:
4004: #-- <samp> tag (end tag required)
4005: sub start_samp {
4006: my ($target,$token) = @_;
4007: my $currentstring = '';
4008: if ($target eq 'web' || $target eq 'webgrade') {
4009: $currentstring = $token->[4];
4010: } elsif ($target eq 'tex') {
4011: $currentstring='\texttt{';
4012: }
4013: return $currentstring;
4014: }
4015:
4016: sub end_samp {
4017: my ($target,$token) = @_;
4018: my $currentstring = '';
4019: if ($target eq 'web' || $target eq 'webgrade') {
4020: $currentstring = $token->[2];
4021: } elsif ($target eq 'tex') {
4022: $currentstring='}';
4023: }
4024: return $currentstring;
4025: }
4026:
4027: #-- <server> tag
4028: sub start_server {
4029: my ($target,$token) = @_;
4030: my $currentstring = '';
4031: if ($target eq 'web' || $target eq 'webgrade') {
4032: $currentstring = $token->[4];
4033: }
4034: return $currentstring;
4035: }
4036:
4037: sub end_server {
4038: my ($target,$token) = @_;
4039: my $currentstring = '';
4040: if ($target eq 'web' || $target eq 'webgrade') {
4041: $currentstring = $token->[2];
4042: }
4043: return $currentstring;
4044: }
4045:
4046: #-- <spacer> tag (end tag forbidden)
4047: sub start_spacer {
4048: my ($target,$token) = @_;
4049: my $currentstring = &end_p(); # Close off any open <p> tag.
4050: if ($target eq 'web' || $target eq 'webgrade') {
4051: $currentstring .= $token->[4];
4052: }
4053: return $currentstring;
4054: }
4055:
4056: sub end_spacer {
4057: my ($target,$token) = @_;
4058: my $currentstring = '';
4059: if ($target eq 'web' || $target eq 'webgrade') {
4060: $currentstring = $token->[2];
4061: }
4062: return $currentstring;
4063: }
4064:
4065: #-- <span> tag (end tag required)
4066: sub start_span {
4067: my ($target,$token) = @_;
4068: my $currentstring = '';
4069: if ($target eq 'web' || $target eq 'webgrade') {
4070: $currentstring = $token->[4];
4071: }
4072: return $currentstring;
4073: }
4074:
4075: sub end_span {
4076: my ($target,$token) = @_;
4077: my $currentstring = '';
4078: if ($target eq 'web' || $target eq 'webgrade') {
4079: $currentstring = $token->[2];
4080: }
4081: return $currentstring;
4082: }
4083:
4084: #-- <tbody> tag (end tag optional)
4085: sub start_tbody {
4086: my ($target,$token) = @_;
4087: my $currentstring = '';
4088: if ($target eq 'web' || $target eq 'webgrade') {
4089: $currentstring = $token->[4];
4090: }
4091: return $currentstring;
4092: }
4093:
4094: sub end_tbody {
4095: my ($target,$token) = @_;
4096: my $currentstring = '';
4097: if ($target eq 'web' || $target eq 'webgrade') {
4098: $currentstring = $token->[2];
4099: }
4100: return $currentstring;
4101: }
4102:
4103: #-- <tfoot> tag (end tag optional)
4104: sub start_tfoot {
4105: my ($target,$token) = @_;
4106: my $currentstring = '';
4107: if ($target eq 'web' || $target eq 'webgrade') {
4108: $currentstring = $token->[4];
4109: }
4110: return $currentstring;
4111: }
4112:
4113: sub end_tfoot {
4114: my ($target,$token) = @_;
4115: my $currentstring = '';
4116: if ($target eq 'web' || $target eq 'webgrade') {
4117: $currentstring = $token->[2];
4118: }
4119: return $currentstring;
4120: }
4121:
4122: #-- <thead> tag (end tag optional)
4123: sub start_thead {
4124: my ($target,$token) = @_;
4125: my $currentstring = '';
4126: if ($target eq 'web' || $target eq 'webgrade') {
4127: $currentstring = $token->[4];
4128: }
4129: return $currentstring;
4130: }
4131:
4132: sub end_thead {
4133: my ($target,$token) = @_;
4134: my $currentstring = '';
4135: if ($target eq 'web' || $target eq 'webgrade') {
4136: $currentstring = $token->[2];
4137: }
4138: return $currentstring;
4139: }
4140:
4141: #-- <var> tag
4142: sub start_var {
4143: my ($target,$token) = @_;
4144: my $currentstring = '';
4145: if ($target eq 'web' || $target eq 'webgrade') {
4146: $currentstring = $token->[4];
4147: } elsif ($target eq 'tex') {
4148: $currentstring = '\textit{';
4149: }
4150: return $currentstring;
4151: }
4152:
4153: sub end_var {
4154: my ($target,$token) = @_;
4155: my $currentstring = '';
4156: if ($target eq 'web' || $target eq 'webgrade') {
4157: $currentstring = $token->[2];
4158: } elsif ($target eq 'tex') {
4159: $currentstring = '}';
4160: }
4161: return $currentstring;
4162: }
4163:
4164: #-- <wbr> tag (end tag forbidden)
4165: sub start_wbr {
4166: my ($target,$token) = @_;
4167: my $currentstring = '';
4168: if ($target eq 'web' || $target eq 'webgrade') {
4169: $currentstring = $token->[4];
4170: }
4171: return $currentstring;
4172: }
4173:
4174: sub end_wbr {
4175: my ($target,$token) = @_;
4176: my $currentstring = '';
4177: if ($target eq 'web' || $target eq 'webgrade') {
4178: $currentstring = $token->[2];
4179: }
4180: return $currentstring;
4181: }
4182:
4183: #-- <hideweboutput> tag
4184: sub start_hideweboutput {
4185: my ($target,$token) = @_;
4186: if ($target eq 'web' || $target eq 'webgrade') {
4187: &Apache::lonxml::startredirection();
4188: }
4189: return '';
4190: }
4191:
4192: sub end_hideweboutput {
4193: my ($target,$token) = @_;
4194: my $currentstring = '';
4195: if ($target eq 'web' || $target eq 'webgrade') {
4196: $currentstring = &Apache::lonxml::endredirection();
4197: }
4198: return '';
4199: }
4200:
4201:
4202: sub image_replication {
4203: my $src = shift;
4204: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4205: #replicates eps or ps
4206: my $epssrc = my $pssrc = $src;
4207: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4208: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4209: if (not -e $epssrc && not -e $pssrc) {
4210: my $result=&Apache::lonnet::repcopy($epssrc);
4211: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4212: }
4213: return '';
4214: }
4215: #
4216: # Get correct sizing parameter for an image given
4217: # it's initial ht. and wid. This allows sizing of
4218: # images that are generated on-the-fly (e.g. gnuplot)
4219: # as well as serving as a utility for image_size.
4220: #
4221: # Parameter:
4222: # height_param
4223: # width_param - Initial picture dimensions.
4224: # scaling - A scale factor.
4225: # parstack, - the current stack of tag attributes
4226: # from the xml parser
4227: # safeeval, - pointer to the safespace
4228: # depth, - from what level in the stack to look for attributes
4229: # (assumes -1 if unspecified)
4230: # cis - look for attrubutes case insensitively
4231: # (assumes false)
4232: #
4233: # Returns:
4234: # height, width - new dimensions.
4235: #
4236: sub resize_image {
4237: my ($height_param, $width_param, $scaling,
4238: $parstack, $safeeval, $depth, $cis) = @_;
4239:
4240: # First apply the scaling...
4241:
4242: $height_param = $height_param * $scaling;
4243: $width_param = $width_param * $scaling;
4244:
4245: #do we have any specified LaTeX size of the picture?
4246: my $toget='TeXwidth';
4247: if ($cis) {
4248: $toget=lc($toget);
4249: }
4250: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4251: $safeeval,$depth,$cis);
4252: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4253: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4254: $safeeval,$depth,$cis);
4255: #do we have any specified web size of the picture?
4256: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4257: $depth,1);
4258: if ($TeXwidth) {
4259: my $old_width_param=$width_param;
4260: if ($TeXwidth=~/(\d+)\s*\%/) {
4261: $width_param = $1*$env{'form.textwidth'}/100;
4262: } else {
4263: $width_param = $TeXwidth;
4264: }
4265: if ($TeXheight) {
4266: $height_param = $TeXheight;
4267: } elsif ($old_width_param) {
4268: $height_param=$TeXwidth/$old_width_param*$height_param;
4269: }
4270: } elsif ($TeXheight) {
4271: $height_param = $TeXheight;
4272: if ($height_param) {
4273: $width_param = $TeXheight/$height_param*$width_param;
4274: }
4275: } elsif ($width) {
4276: my $old_width_param=$width_param;
4277: $width_param = $width*$scaling;
4278: if ($old_width_param) {
4279: $height_param=$width_param/$old_width_param*$height_param;
4280: }
4281: }
4282: if ($width_param > $env{'form.textwidth'}) {
4283: my $old_width_param=$width_param;
4284: $width_param =0.95*$env{'form.textwidth'};
4285: if ($old_width_param) {
4286: $height_param=$width_param/$old_width_param*$height_param;
4287: }
4288: }
4289:
4290: return ($height_param, $width_param);
4291: }
4292:
4293: sub image_size {
4294: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4295:
4296: #size of image from gif/jpg/jpeg/png
4297: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4298: if (-e $ressrc) {
4299: $src = $ressrc;
4300: }
4301: my $image = Image::Magick->new;
4302: my $current_figure = $image->Read($src);
4303: my $width_param = $image->Get('width');
4304: my $height_param = $image->Get('height');
4305: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4306: undef($image);
4307:
4308: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4309: $scaling, $parstack, $safeeval,
4310: $depth, $cis);
4311:
4312: return ($height_param, $width_param);
4313: }
4314:
4315: sub image_width {
4316: my ($height, $width) = &image_size(@_);
4317: return $width;
4318: }
4319: # Not yet 100% sure this is correct in all circumstances..
4320: # due to my uncertainty about mods to image_size.
4321: #
4322: sub image_height {
4323: my ($height, $width) = &image_size(@_);
4324: return $height;
4325: }
4326:
4327: sub get_eps_image {
4328: my ($src)=@_;
4329: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4330:
4331: # In order to prevent the substitution of the alt text, we need to
4332: # be sure the orig_src file is on system now so:
4333:
4334: if (! -e $orig_src) {
4335: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4336: }
4337: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4338: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4339: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4340: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4341: &Apache::lonxml::debug("Filelocation gives: $src");
4342: if (! -e $src) {
4343: &Apache::lonxml::debug("$src does not exist");
4344: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4345: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4346: #if replication failed try to find ps file
4347: $src=~s/\.eps$/\.ps/;
4348: &Apache::lonxml::debug("Now looking for $src");
4349: #if no ps file try to replicate it.
4350: my $didrepcopy = &Apache::lonnet::repcopy($src);
4351: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4352: if ( (not -e $src) ||
4353: ($didrepcopy ne 'ok')) {
4354: &Apache::lonxml::debug("Failed to find or replicate $src");
4355:
4356: #if replication failed try to produce eps file dynamically
4357: $src=~s/\.ps$/\.eps/;
4358: my $temp_file;
4359: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4360: my $newsrc=$orig_src;
4361: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4362: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4363: print FILE ("$newsrc\n");
4364: close(FILE);
4365: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4366: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4367: if ($sext ne "") { # Put the ext. back in to uniquify.
4368: $src =~ s/\.eps$/$sext.eps/;
4369: }
4370:
4371: }
4372:
4373: }
4374: } else {
4375: # If the postscript file has spaces in its name,
4376: # LaTeX will gratuitiously vomit. Therefore
4377: # queue such files for copy with " " replaced by "_".
4378: # printout.pm will know them by their .ps or .eps extensions.
4379: my $newsrc = $orig_src;
4380: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4381: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4382: print FILE "$src\n";
4383: close FILE;
4384: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4385: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4386: }
4387: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4388: $path =~ s/ /\_/g;
4389: $file =~ s/ /\_/g;
4390: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4391: return ($path.'/',$file);
4392: }
4393:
4394: sub eps_generation {
4395: my ($src,$file,$width_param) = @_;
4396: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4397: my $temp_file = Apache::File->new('>>'.$filename);
4398: print $temp_file "$src\n";
4399: my $newsrc = $src;
4400: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4401: $newsrc=~s{/home/httpd/html/res}{};
4402: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4403: $newsrc=~s{/\./}{/};
4404: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4405: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4406: $newsrc=~s{/home/httpd/lonUsers}{};
4407: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4408: }
4409: if ($newsrc=~m{/userfiles/}) {
4410: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4411: } else {
4412: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4413: }
4414: }
4415:
4416: sub file_path {
4417: my $src=shift;
4418: my ($file,$path);
4419: if ($src =~ m!(.*)/([^/]*)$!) {
4420: $file = $2;
4421: $path = $1.'/';
4422: }
4423: return $file,$path;
4424: }
4425: # Converts a measurement in to mm from any of
4426: # the other valid LaTeX units of measure.
4427: # If the units of measure are missing from the
4428: # parameter, it is assumed to be in and returned
4429: # with mm units of measure
4430: sub recalc {
4431: my $argument = shift;
4432: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4433: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4434: my $value=$1;
4435: my $units=$2;
4436: if ($units eq 'cm') {
4437: $value*=10;
4438: } elsif ($units eq 'in') {
4439: $value*=25.4;
4440: } elsif ($units eq 'pc') {
4441: $value*=(25.4*12/72.27);
4442: } elsif ($units eq 'pt') {
4443: $value*=(25.4/72.27);
4444: }
4445: return $value.' mm';
4446: }
4447:
4448: sub LATEX_length {
4449: my $garbage=shift;
4450: $garbage=~s/^\s+$//;
4451: $garbage=~s/^\s+(\S.*)/$1/;#space before
4452: $garbage=~s/(.*\S)\s+$/$1/;#space after
4453: $garbage=~s/(\s)+/$1/;#only one space
4454: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4455: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4456: $garbage=~s/([^\\])\$/$1/g;#$
4457: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4458: $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;
4459: $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;
4460: $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;
4461: $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;
4462: $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;
4463: $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;
4464: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4465: #remove some other LaTeX command
4466: $garbage=~s|\\(\w+)\\|\\|g;
4467: $garbage=~s|\\(\w+)(\s*)|$2|g;
4468: $garbage=~s|\+|11|g;
4469: my $value=length($garbage);
4470: return $value;
4471: }
4472:
4473: # Wrap image 'stuff' inside of the LaTeX required to implement
4474: # alignment:
4475: # align_tex_image(align, latex_rendering, image)
4476: # Where:
4477: # align - The HTML alignment specification.
4478: # latex_rendering - rendering hint for latex.
4479: # image - The LaTeX needed to insert the image itsef.
4480: # width,height - dimensions of the image.
4481: # Returns:
4482: # The 1/2 wrapped image and the stuff required to close the
4483: # wrappage. This allows e.g. randomlabel to insert more stuff
4484: # into the closure.
4485: #
4486: sub align_latex_image {
4487: my ($align, $latex_rendering, $image, $width, $height) = @_;
4488: my $currentstring; # The 1/2 wrapped image.
4489: my $closure; # The closure of the wrappage.
4490: # If there's an alignment specification we need to honor it here.
4491: # For the horizontal alignments, we will also honor the
4492: # value of the latex specfication. The default is parbox,
4493: # and that's used for illegal values too.
4494: #
4495: # Even though we set a default alignment value, the user
4496: # could have given us an illegal value. In that case we
4497: # just use the default alignment of bottom..
4498: $currentstring = "\n% figurewrapping \n";
4499: if ($align eq "top") {
4500: $currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
4501: $closure = '}';
4502: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4503: my $offset = $height/2;
4504: $currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
4505: $closure = '}';
4506: } elsif ($align eq "left") {
4507: if ($latex_rendering eq "parpic") {
4508: $currentstring .= '\parpic[l]{'.$image;
4509: $closure = '}';
4510: } elsif ($latex_rendering eq "parbox") {
4511: $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
4512: .$image;
4513: $closure = '\end{minipage}';
4514: } elsif ($latex_rendering eq "wrapfigure"
4515: || $latex_rendering ne 'none') { # wrapfig render
4516: $currentstring .=
4517: '\begin{wrapfigure}{l}{'.$width.'mm}'
4518: .'\scalebox{1.0}{'.$image;
4519: $closure = '}\end{wrapfigure}';
4520: }
4521: } elsif ($align eq "right") {
4522: if ($latex_rendering eq "parpic") {
4523: $currentstring .= '\parpic[r]{'.$image;
4524: $closure = '}';
4525: } elsif ($latex_rendering eq "parbox") {
4526: $currentstring .= '\begin{minipage}[r]{'.$width.'mm}'
4527: .$image;
4528: $closure = '\end{minipage}';
4529: } elsif ($latex_rendering eq "wrapfigure"
4530: || $latex_rendering ne 'none') { # wrapfig render
4531: $currentstring .=
4532: '\begin{wrapfigure}{r}{'.$width.'mm}'
4533: .'\scalebox{1.0}{'.$image;
4534: $closure = '}\end{wrapfigure}';
4535: }
4536: } else { # Bottom is also default.
4537: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4538: $currentstring .= "{$image";
4539: $closure = '}';
4540: }
4541: $currentstring .= "\n% end wrappage\n";
4542: $closure = "\n% Begin closure\n".$closure."\n% End closure\n";
4543: return ($currentstring, $closure);
4544: }
4545:
4546: # is_inside_of $tagstack $tag
4547: # This sub returns true if the current state of Xml processing
4548: # is inside of the tag.
4549: # Parameters:
4550: # tagstack - The tagstack from the parser.
4551: # tag - The tag (without the <>'s.).
4552: # Sample usage:
4553: # if (is_inside_of($tagstack "table")) {
4554: # # I'm in a table....
4555: # }
4556: sub is_inside_of {
4557: my ($tagstack, $tag) = @_;
4558: my @stack = @$tagstack;
4559: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4560: if ($stack[$i] eq $tag) {
4561: return 1;
4562: }
4563: }
4564: return 0;
4565: }
4566:
4567:
4568: 1;
4569: __END__
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