1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.335 2006/09/02 18:49:37 albertel Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: # use Data::Dumper;
52:
53: BEGIN {
54:
55: &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'));
56:
57: }
58:
59: #
60: # Dumps all elements of the table structure.
61: # Need this 'cause evidently when given an array, Data::Dumper only seems
62: # to dump element 0.
63: #
64: #sub debug_dump_table {
65: # my $lastrow = $#Apache::londefdef::table;
66: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
67: # my $row;
68: # for ($row =0; $row <= $lastrow; $row++ ) {
69: # my $text = Dumper($Apache::londefdef::table[$row]);
70: # &Apache::lonnet::logthis("table [ $row ]".$text);
71: # }
72: #}
73: sub initialize_londefdef {
74: $Apache::londefdef::TD_redirection=0;
75: @Apache::londefdef::table = ();
76: $Apache::londefdef::select=0;
77: undef(@Apache::londefdef::description);
78: @Apache::londefdef::DD=(0);
79: @Apache::londefdef::DT=(0);
80: @Apache::londefdef::seenDT=(0);
81: $Apache::londefdef::list_index=0;
82: undef($Apache::londefdef::head);
83: undef($Apache::londefdef::title);
84: }
85:
86: #======================= TAG SUBROUTINES =====================
87: #-- <output>
88: sub start_output {
89: my ($target) = @_;
90: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
91: return '';
92: }
93: sub end_output {
94: my ($target) = @_;
95: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
96: return '';
97: }
98: #-- <m> tag
99: sub start_m {
100: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
101: my $currentstring = '';
102: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
103: if ($target eq 'web' || $target eq 'analyze') {
104: &Apache::lonxml::debug("M is starting with:$inside:");
105: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
106: if ($eval eq 'on') {
107: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
108: #&Apache::lonxml::debug("M is evaulated to:$inside:");
109: }
110: my $tex = $inside;
111: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
112: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
113: if ($Apache::lontexconvert::errorstring) {
114: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
115: $tex = &HTML::Entities::encode($tex,'<>&"');
116: my ($linenumber) =
117: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
118: if (defined($linenumber)) {
119: my @tex=split("\n",$tex);
120: $tex[$linenumber]='<b><font color="red">'.
121: $tex[$linenumber].'</font></b>';
122: $tex=join("\n",@tex);
123: }
124: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
125: $Apache::lontexconvert::errorstring='';
126: }
127: #&Apache::lonxml::debug("M is ends with:$currentstring:");
128: $Apache::lonxml::post_evaluate=0;
129: } elsif ($target eq 'tex') {
130: $currentstring = $inside;
131: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
132: if ($eval eq 'on') {
133: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
134: }
135: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
136: # detect simple math mode entry exits, and convert them
137: # to use \ensuremath
138: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
139: $currentstring=~s/^(\s*)\$/$1/;
140: $currentstring=~s/\$(\s*)$/$1/;
141: $currentstring='\ensuremath{'.$currentstring.'}';
142: }
143: $Apache::lonxml::post_evaluate=0;
144: }
145: return $currentstring;
146: }
147:
148: sub end_m {
149: my ($target,$token) = @_;
150: my $currentstring = '';
151: if ($target eq 'tex') {
152: $currentstring = "";
153: }
154: return $currentstring;
155: }
156:
157: sub start_tthoption {
158: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
159: my $result;
160: if ($target eq 'web' || $target eq 'webgrade') {
161: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
162: $style);
163: $inside=~s/^\s*//;
164: if ($env{'browser.mathml'}) {
165: &tth::ttmoptions($inside);
166: } else {
167: &tth::tthoptions($inside);
168: }
169: }
170: return $result;
171: }
172:
173: sub end_tthoption {
174: my ($target,$token) = @_;
175: my $result;
176: return $result;
177: }
178:
179: #-- <html> tag (end tag optional)
180: sub start_html {
181: my ($target,$token) = @_;
182: my $currentstring = '';
183: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
184: # start_body() takes care of emitting the <html>
185: } elsif ($target eq 'tex') {
186: $currentstring .=
187: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
188: if (($env{'form.latex_type'}=~'batchmode') ||
189: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
190: $currentstring .= '\newcommand{\keephidden}[1]{}'.
191: '\renewcommand{\deg}{$^{\circ}$}'.
192: '\usepackage{multirow}'.
193: '\usepackage{longtable}'.
194: '\usepackage{textcomp}'.
195: '\usepackage{makeidx}'.
196: '\usepackage[dvips]{graphicx}'.
197: '\usepackage{wrapfig}'.
198: '\usepackage{picins}'.
199: '\usepackage{epsfig}'.
200: '\usepackage{calc}'.
201: '\usepackage{amsmath}'.
202: '\usepackage{amssymb}'.
203: '\usepackage{amsfonts}'.
204: '\usepackage{amsthm}'.
205: '\usepackage{amscd}'.
206: '\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}}'.
207: '\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}}';
208: }
209: return $currentstring;
210: }
211:
212: sub end_html {
213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
214: my $currentstring = '';
215: if ($target eq 'web' || $target eq 'webgrade') {
216: # end_body takes care of the </html>
217: }
218: return $currentstring;
219: }
220:
221: #-- <head> tag (end tag optional)
222: sub start_head {
223: my ($target,$token) = @_;
224: my $currentstring = '';
225: if ($target eq 'web' || $target eq 'webgrade') {
226: &Apache::lonxml::startredirection();
227: }
228: return $currentstring;
229: }
230:
231: sub end_head {
232: my ($target,$token) = @_;
233: my $currentstring = '';
234: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
235: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
236: # in case there is a </head> but no <head>
237: if ($Apache::lonxml::redirection) {
238: $Apache::londefdef::head = &Apache::lonxml::endredirection();
239: }
240: }
241: return $currentstring;
242: }
243:
244: #-- <map> tag (end tag required)
245: sub start_map {
246: my ($target,$token) = @_;
247: my $currentstring = '';
248: if ($target eq 'web' || $target eq 'webgrade') {
249: $currentstring = $token->[4];
250: }
251: return $currentstring;
252: }
253:
254: sub end_map {
255: my ($target,$token) = @_;
256: my $currentstring = '';
257: if ($target eq 'web' || $target eq 'webgrade') {
258: $currentstring = $token->[2];
259: }
260: return $currentstring;
261: }
262:
263: #-- <select> tag (end tag required)
264: sub start_select {
265: my ($target,$token) = @_;
266: my $currentstring = '';
267: if ($target eq 'web' || $target eq 'webgrade') {
268: $currentstring = $token->[4];
269: } elsif ($target eq 'tex') {
270: $Apache::londefdef::select=0;
271: }
272: return $currentstring;
273: }
274:
275: sub end_select {
276: my ($target,$token) = @_;
277: my $currentstring = '';
278: if ($target eq 'web' || $target eq 'webgrade') {
279: $currentstring = $token->[2];
280: }
281: return $currentstring;
282: }
283:
284: #-- <option> tag (end tag optional)
285: sub start_option {
286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
287: my $currentstring = '';
288: if ($target eq 'web' || $target eq 'webgrade') {
289: $currentstring = $token->[4];
290: } elsif ($target eq 'tex') {
291: $Apache::londefdef::select++;
292: if ($Apache::londefdef::select == 1) {
293: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
294: } else {
295: $currentstring='\keephidden{';
296: }
297: }
298: return $currentstring;
299: }
300:
301: sub end_option {
302: my ($target,$token) = @_;
303: my $currentstring = '';
304: if ($target eq 'web' || $target eq 'webgrade') {
305: $currentstring = $token->[2];
306: } elsif ($target eq 'tex') {
307: $currentstring='}';
308: }
309: return $currentstring;
310: }
311:
312: #-- <input> tag (end tag forbidden)
313: sub start_input {
314: my ($target,$token) = @_;
315: my $currentstring = '';
316: if ($target eq 'web' || $target eq 'webgrade') {
317: $currentstring = $token->[4];
318: }
319: return $currentstring;
320: }
321:
322: sub end_input {
323: my ($target,$token) = @_;
324: my $currentstring = '';
325: if ($target eq 'web' || $target eq 'webgrade') {
326: $currentstring = $token->[2];
327: }
328: return $currentstring;
329: }
330:
331: #-- <textarea> tag (end tag required)
332: sub start_textarea {
333: my ($target,$token) = @_;
334: my $currentstring = '';
335: if ($target eq 'web' || $target eq 'webgrade') {
336: $currentstring = $token->[4];
337: }
338: return $currentstring;
339: }
340:
341: sub end_textarea {
342: my ($target,$token) = @_;
343: my $currentstring = '';
344: if ($target eq 'web' || $target eq 'webgrade') {
345: $currentstring = $token->[2];
346: }
347: return $currentstring;
348: }
349:
350: #-- <form> tag (end tag required)
351: sub start_form {
352: my ($target,$token) = @_;
353: my $currentstring = '';
354: if ($target eq 'web' || $target eq 'webgrade') {
355: $currentstring = $token->[4];
356: }
357: return $currentstring;
358: }
359:
360: sub end_form {
361: my ($target,$token) = @_;
362: my $currentstring = '';
363: if ($target eq 'web' || $target eq 'webgrade') {
364: $currentstring = $token->[2];
365: }
366: return $currentstring;
367: }
368:
369: #-- <title> tag (end tag required)
370: sub start_title {
371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
372: my $currentstring = '';
373: if ($target eq 'web' || $target eq 'webgrade') {
374: $Apache::londefdef::title =
375: &Apache::lonxml::get_all_text('/title',$parser,$style);
376: } elsif ($target eq 'tex') {
377: $currentstring .= '\keephidden{Title of the document: '
378: }
379: if ($target eq 'meta') {
380: $currentstring='<title>';
381: &start_output($target);
382: }
383: return $currentstring;
384: }
385:
386: sub end_title {
387: my ($target,$token) = @_;
388: my $currentstring = '';
389: if ($target eq 'web' || $target eq 'webgrade') {
390: # start_title takes care of swallowing the title
391: } elsif ($target eq 'tex') {
392: $currentstring .= '}';
393: }
394: if ($target eq 'meta') {
395: &end_output($target);
396: $currentstring='</title>';
397: }
398: return $currentstring;
399: }
400:
401: #-- <meta> tag (end tag forbidden)
402: sub start_meta {
403: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
404: my $currentstring = '';
405: if ($target eq 'web' || $target eq 'webgrade') {
406: my $args='';
407: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
408: if ($args eq '') {
409: &Apache::lonxml::get_all_text("/meta",$parser,$style);
410: } else {
411: $currentstring = $token->[4];
412: }
413: } elsif ($target eq 'meta') {
414: unless (&Apache::lonxml::get_param
415: ('http-equiv',$parstack,$safeeval,undef,1)) {
416: my $name=$token->[2]->{'name'};
417: $name=~tr/A-Z/a-z/;
418: $name=~s/\s/\_/gs;
419: $name=~s/\W//gs;
420: if ($name) {
421: $currentstring='<'.$name;
422: my $display=&Apache::lonxml::get_param
423: ('display',$parstack,$safeeval,undef,1);
424: if ($display) {
425: $display=~s/\"/\'/g;
426: $currentstring.=' display="'.$display.'"';
427: }
428: $currentstring.='>'.
429: &Apache::lonxml::get_param
430: ('content',$parstack,$safeeval,undef,1).
431: '</'.$name.'>';
432: }
433: my $display=&Apache::lonxml::get_param
434: ('display',$parstack,$safeeval,undef,1);
435: if ($display) {
436: $display=&HTML::Entities::encode($display,'<>&"');
437: $currentstring.='<'.$name.'.display>'.$display.
438: '</'.$name.'.display>';
439: }
440: }
441: } elsif ($target eq 'tex') {
442: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
443: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
444: if ((not defined $content) && (not defined $name)) {
445: &Apache::lonxml::startredirection();
446: }
447: }
448: return $currentstring;
449: }
450:
451: sub end_meta {
452: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
453: my $currentstring = '';
454: if ($target eq 'web' || $target eq 'webgrade') {
455: my $args='';
456: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
457: if ($args ne '') {
458: $currentstring = $token->[4];
459: }
460: } elsif ($target eq 'tex') {
461: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
462: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
463: if ((not defined $content) && (not defined $name)) {
464: &Apache::lonxml::endredirection();
465: }
466: }
467: return $currentstring;
468: }
469:
470: # accessrule
471: sub start_accessrule {
472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
473: my $currentstring = '';
474: my $eff=&Apache::lonxml::get_param
475: ('effect',$parstack,$safeeval,undef,1);
476: my $realm=&Apache::lonxml::get_param
477: ('realm',$parstack,$safeeval,undef,1);
478: my $role=&Apache::lonxml::get_param
479: ('role',$parstack,$safeeval,undef,1);
480: $realm=~s/\s+//g;
481: $realm=~s/\//\_/g;
482: $realm=~s/^\_//;
483: $realm=~s/\W/\;/g;
484: $role=~s/\s+//g;
485: $role=~s/\//\_/g;
486: $role=~s/\W/\;/g;
487: if ($target eq 'web') {
488: my $args='';
489: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
490: if ($args eq '') {
491: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
492: } else {
493: $currentstring = $token->[4];
494: }
495: }
496: if ($target eq 'meta') {
497: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
498: }
499: return $currentstring;
500: }
501:
502: sub end_accessrule {
503: my ($target,$token,$tagstack,$parstack,$parser) = @_;
504: my $currentstring = '';
505: if ($target eq 'web') {
506: my $args='';
507: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
508: if ($args ne '') {
509: $currentstring = $token->[4];
510: }
511: }
512: return $currentstring;
513: }
514:
515: #-- <body> tag (end tag required)
516: sub start_body {
517: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
518: my $currentstring = '';
519:
520: if ($target eq 'web' || $target eq 'webgrade') {
521: if ($Apache::lonhomework::parsing_a_problem) {
522: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
523: return '';
524: }
525:
526: if (&is_inside_of($tagstack, "head")) {
527: &end_head(@_);
528: }
529: $currentstring =
530: &Apache::loncommon::start_page($Apache::londefdef::title,
531: $Apache::londefdef::head,
532: {'add_entries' => $token->[2],
533: 'no_title' => 1,
534: 'force_register' => 1});
535:
536: if ($env{'request.state'} ne 'published') {
537: $currentstring.=&Apache::lonmenu::constspaceform();
538: $currentstring.=(<<EDITBUTTON);
539: <form method="post">
540: <input type="submit" name="editmode" accesskey="e" value="Edit" />
541: </form>
542: <br />
543: EDITBUTTON
544: }
545: $currentstring.=&Apache::lonxml::message_location();
546: } elsif ($target eq 'tex') {
547: $currentstring = '\begin{document}';
548: }
549: return $currentstring;
550: }
551:
552: sub end_body {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
554: my $currentstring = &end_p(); # Close off unclosed <p>
555: if ($target eq 'web' || $target eq 'webgrade') {
556: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
557: } elsif ($target eq 'tex') {
558: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
559: }
560: return $currentstring;
561: }
562:
563: # \begin{center} causes a new paragprah spacing that looks odd inside
564: # of a table cell
565: sub center_correction { return '\vspace*{-6 mm}'; }
566: #-- <center> tag (end tag required)
567: sub start_center {
568: my ($target,$token,$tagstack) = @_;
569: my $currentstring = &end_p(); # Close off any prior para.
570: if ($target eq 'web' || $target eq 'webgrade') {
571: $currentstring .= $token->[4];
572: } elsif ($target eq 'tex') {
573: if (&is_inside_of($tagstack, "table")) {
574: $currentstring .= ¢er_correction();
575: }
576: $currentstring .= '\begin{center}';
577: }
578: return $currentstring;
579: }
580:
581: sub end_center {
582: my ($target,$token,$tagstack) = @_;
583: my $currentstring = '';
584: if ($target eq 'web' || $target eq 'webgrade') {
585: $currentstring = $token->[2];
586: } elsif ($target eq 'tex') {
587: $currentstring = '\end{center}';
588: }
589: return $currentstring;
590: }
591:
592: #-- <b> tag (end tag required)
593: # NOTE: In TeX mode disables internal <p>
594: sub start_b {
595: my ($target,$token) = @_;
596: my $currentstring = '';
597: if ($target eq 'web' || $target eq 'webgrade') {
598: $currentstring = $token->[4];
599: } elsif ($target eq 'tex') {
600: &disable_para();
601: $currentstring .= '\textbf{';
602: }
603: return $currentstring;
604: }
605:
606: sub end_b {
607: my ($target,$token) = @_;
608: my $currentstring = '';
609: if ($target eq 'web' || $target eq 'webgrade') {
610: $currentstring = $token->[2];
611: } elsif ($target eq 'tex') {
612: &enable_para();
613: $currentstring = '}';
614: }
615: return $currentstring;
616: }
617:
618: #-- <strong> tag (end tag required)
619: # NOTE: in TeX mode disables internal <p>
620: sub start_strong {
621: my ($target,$token) = @_;
622: my $currentstring = '';
623: if ($target eq 'web' || $target eq 'webgrade') {
624: $currentstring = $token->[4];
625: } elsif ($target eq 'tex') {
626: &disable_para();
627: $currentstring = '\textbf{';
628: }
629: return $currentstring;
630: }
631:
632: sub end_strong {
633: my ($target,$token) = @_;
634: my $currentstring = '';
635: if ($target eq 'web' || $target eq 'webgrade') {
636: $currentstring = $token->[2];
637: } elsif ($target eq 'tex') {
638: &enable_para();
639: $currentstring = '}';
640: }
641: return $currentstring;
642: }
643:
644: #-- <h1> tag (end tag required)
645: sub start_h1 {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
647: my $currentstring = &end_p(); # Close off any prior para.
648: if ($target eq 'web' || $target eq 'webgrade') {
649: $currentstring .= $token->[4];
650: } elsif ($target eq 'tex') {
651: my $pre;
652: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
653: if ($align eq 'center') {
654: $pre='\begin{center}';
655: } elsif ($align eq 'left') {
656: $pre='\rlap{';
657: } elsif ($align eq 'right') {
658: $pre=' \hfill \llap{';
659: }
660: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
661: if (not defined $TeXsize) {$TeXsize="large";}
662: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
663: } elsif ($target eq 'meta') {
664: $currentstring.='<subject>';
665: &start_output($target);
666: }
667: return $currentstring;
668: }
669:
670: sub end_h1 {
671: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
672: my $currentstring = '';
673: if ($target eq 'web' || $target eq 'webgrade') {
674: $currentstring .= $token->[2];
675: } elsif ($target eq 'tex') {
676: my $post='\vskip 0 mm ';
677: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
678: if ($align eq 'center') {
679: $post='\end{center}';
680: } elsif ($align eq 'left') {
681: $post='} \hfill'.'\vskip 0 mm ';
682: } elsif ($align eq 'right') {
683: $post='}'.'\vskip 0 mm ';
684: }
685: $currentstring .= '}}'.$post;
686: } elsif ($target eq 'meta') {
687: &end_output($target);
688: $currentstring='</subject>';
689: }
690: return $currentstring;
691: }
692:
693: #-- <h2> tag
694: sub start_h2 {
695: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
696: my $currentstring = &end_p(); # Close off any prior para.
697: if ($target eq 'web' || $target eq 'webgrade') {
698: $currentstring .= $token->[4];
699: } elsif ($target eq 'tex') {
700: my $pre;
701: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
702: if ($align eq 'center') {
703: $pre='\begin{center}';
704: } elsif ($align eq 'left') {
705: $pre='\rlap{';
706: } elsif ($align eq 'right') {
707: $pre=' \hfill \llap{';
708: }
709: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
710: if (not defined $TeXsize) {$TeXsize="large";}
711: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
712: }
713: return $currentstring;
714: }
715:
716: sub end_h2 {
717: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
718: my $currentstring = '';
719: if ($target eq 'web' || $target eq 'webgrade') {
720: $currentstring .= $token->[2];
721: } elsif ($target eq 'tex') {
722: my $post='\vskip 0 mm ';
723: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
724: if ($align eq 'center') {
725: $post='\end{center}';
726: } elsif ($align eq 'left') {
727: $post='} \hfill'.'\vskip 0 mm ';
728: } elsif ($align eq 'right') {
729: $post='}'.'\vskip 0 mm ';
730: }
731: $currentstring .= '}}'.$post;
732: }
733: return $currentstring;
734: }
735:
736: #-- <h3> tag
737: sub start_h3 {
738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
739: my $currentstring = &end_p(); # Close off any prior para.
740: if ($target eq 'web' || $target eq 'webgrade') {
741: $currentstring .= $token->[4];
742: } elsif ($target eq 'tex') {
743: my $pre;
744: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
745: if ($align eq 'center') {
746: $pre='\begin{center}';
747: } elsif ($align eq 'left') {
748: $pre='\rlap{';
749: } elsif ($align eq 'right') {
750: $pre=' \hfill \llap{';
751: }
752: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
753: if (not defined $TeXsize) {$TeXsize="large";}
754: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
755: }
756: return $currentstring;
757: }
758:
759: sub end_h3 {
760: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
761: my $currentstring = '';
762: if ($target eq 'web' || $target eq 'webgrade') {
763: $currentstring .= $token->[2];
764: } elsif ($target eq 'tex') {
765: my $post='\vskip 0 mm ';
766: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
767: if ($align eq 'center') {
768: $post='\end{center}';
769: } elsif ($align eq 'left') {
770: $post='} \hfill'.'\vskip 0 mm ';
771: } elsif ($align eq 'right') {
772: $post='}'.'\vskip 0 mm ';
773: }
774: $currentstring .= '}}'.$post;
775: }
776: return $currentstring;
777: }
778:
779: #-- <h4> tag
780: sub start_h4 {
781: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
782: my $currentstring = &end_p(); # Close off any prior para.
783: if ($target eq 'web' || $target eq 'webgrade') {
784: $currentstring .= $token->[4];
785: } elsif ($target eq 'tex') {
786: my $pre;
787: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
788: if ($align eq 'center') {
789: $pre='\begin{center}';
790: } elsif ($align eq 'left') {
791: $pre='\rlap{';
792: } elsif ($align eq 'right') {
793: $pre=' \hfill \llap{';
794: }
795: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
796: if (not defined $TeXsize) {$TeXsize="large";}
797: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
798: }
799: return $currentstring;
800: }
801:
802: sub end_h4 {
803: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
804: my $currentstring = '';
805: if ($target eq 'web' || $target eq 'webgrade') {
806: $currentstring .= $token->[2];
807: } elsif ($target eq 'tex') {
808: my $post='\vskip 0 mm ';
809: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
810: if ($align eq 'center') {
811: $post='\end{center}';
812: } elsif ($align eq 'left') {
813: $post='} \hfill'.'\vskip 0 mm ';
814: } elsif ($align eq 'right') {
815: $post='}'.'\vskip 0 mm ';
816: }
817: $currentstring .= '}}'.$post;
818: }
819: return $currentstring;
820: }
821:
822: #-- <h5> tag
823: sub start_h5 {
824: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
825: my $currentstring = &end_p(); # Close off any prior paras.
826: if ($target eq 'web' || $target eq 'webgrade') {
827: $currentstring .= $token->[4];
828: } elsif ($target eq 'tex') {
829: my $pre;
830: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
831: if ($align eq 'center') {
832: $pre='\begin{center}';
833: } elsif ($align eq 'left') {
834: $pre='\rlap{';
835: } elsif ($align eq 'right') {
836: $pre=' \hfill \llap{';
837: }
838: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
839: if (not defined $TeXsize) {$TeXsize="large";}
840: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
841: }
842: return $currentstring;
843: }
844:
845: sub end_h5 {
846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
847: my $currentstring = '';
848: if ($target eq 'web' || $target eq 'webgrade') {
849: $currentstring .= $token->[2];
850: } elsif ($target eq 'tex') {
851: my $post='\vskip 0 mm ';
852: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
853: if ($align eq 'center') {
854: $post='\end{center}';
855: } elsif ($align eq 'left') {
856: $post='} \hfill'.'\vskip 0 mm ';
857: } elsif ($align eq 'right') {
858: $post='}'.'\vskip 0 mm ';
859: }
860: $currentstring .= '}}'.$post;
861: }
862: return $currentstring;
863: }
864:
865: #-- <h6> tag
866: sub start_h6 {
867: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
868: my $currentstring = &end_p(); # Close off any prior paras.
869: if ($target eq 'web' || $target eq 'webgrade') {
870: $currentstring .= $token->[4];
871: } elsif ($target eq 'tex') {
872: my $pre;
873: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
874: if ($align eq 'center') {
875: $pre='\begin{center}';
876: } elsif ($align eq 'left') {
877: $pre='\rlap{';
878: } elsif ($align eq 'right') {
879: $pre=' \hfill \llap{';
880: }
881: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
882: if (not defined $TeXsize) {$TeXsize="large";}
883: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
884: }
885: return $currentstring;
886: }
887:
888: sub end_h6 {
889: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
890: my $currentstring = '';
891: if ($target eq 'web' || $target eq 'webgrade') {
892: $currentstring .= $token->[2];
893: } elsif ($target eq 'tex') {
894: my $post='\vskip 0 mm ';
895: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
896: if ($align eq 'center') {
897: $post='\end{center}';
898: } elsif ($align eq 'left') {
899: $post='} \hfill'.'\vskip 0 mm ';
900: } elsif ($align eq 'right') {
901: $post='}'.'\vskip 0 mm ';
902: }
903: $currentstring .= '}}'.$post;
904: }
905: return $currentstring;
906: }
907:
908: #--- <cite> tag (end tag required)
909: sub start_cite {
910: my ($target,$token) = @_;
911: my $currentstring = '';
912: if ($target eq 'web' || $target eq 'webgrade') {
913: $currentstring .= $token->[4];
914: } elsif ($target eq 'tex') {
915: $currentstring .= '\textit{';
916: }
917: return $currentstring;
918: }
919:
920: sub end_cite {
921: my ($target,$token) = @_;
922: my $currentstring = '';
923: if ($target eq 'web' || $target eq 'webgrade') {
924: $currentstring .= $token->[2];
925: } elsif ($target eq 'tex') {
926: $currentstring .= '}';
927: }
928: return $currentstring;
929: }
930:
931: #-- <i> tag (end tag required)
932: sub start_i {
933: my ($target,$token) = @_;
934: my $currentstring = '';
935: if ($target eq 'web' || $target eq 'webgrade') {
936: $currentstring .= $token->[4];
937: } elsif ($target eq 'tex') {
938: $currentstring .= '\textit{';
939: }
940: return $currentstring;
941: }
942:
943: sub end_i {
944: my ($target,$token) = @_;
945: my $currentstring = '';
946: if ($target eq 'web' || $target eq 'webgrade') {
947: $currentstring .= $token->[2];
948: } elsif ($target eq 'tex') {
949: $currentstring .= '}';
950: }
951: return $currentstring;
952: }
953:
954: #-- <address> tag (end tag required)
955: sub start_address {
956: my ($target,$token) = @_;
957: my $currentstring = '';
958: if ($target eq 'web' || $target eq 'webgrade') {
959: $currentstring .= $token->[4];
960: } elsif ($target eq 'tex') {
961: $currentstring .= '\textit{';
962: }
963: return $currentstring;
964: }
965:
966: sub end_address {
967: my ($target,$token) = @_;
968: my $currentstring = '';
969: if ($target eq 'web' || $target eq 'webgrade') {
970: $currentstring .= $token->[2];
971: } elsif ($target eq 'tex') {
972: $currentstring .= '}';
973: }
974: return $currentstring;
975: }
976:
977: #-- <dfn> tag (end tag required)
978: sub start_dfn {
979: my ($target,$token) = @_;
980: my $currentstring = '';
981: if ($target eq 'web' || $target eq 'webgrade') {
982: $currentstring .= $token->[4];
983: } elsif ($target eq 'tex') {
984: $currentstring .= '\textit{';
985: }
986: return $currentstring;
987: }
988:
989: sub end_dfn {
990: my ($target,$token) = @_;
991: my $currentstring = '';
992: if ($target eq 'web' || $target eq 'webgrade') {
993: $currentstring .= $token->[2];
994: } elsif ($target eq 'tex') {
995: $currentstring .= '}';
996: }
997: return $currentstring;
998: }
999:
1000: #-- <tt> tag (end tag required)
1001: sub start_tt {
1002: my ($target,$token) = @_;
1003: my $currentstring = '';
1004: if ($target eq 'web' || $target eq 'webgrade') {
1005: $currentstring .= $token->[4];
1006: } elsif ($target eq 'tex') {
1007: $currentstring .= '\texttt{';
1008: }
1009: return $currentstring;
1010: }
1011:
1012: sub end_tt {
1013: my ($target,$token) = @_;
1014: my $currentstring = '';
1015: if ($target eq 'web' || $target eq 'webgrade') {
1016: $currentstring .= $token->[2];
1017: } elsif ($target eq 'tex') {
1018: $currentstring .= '}';
1019: }
1020: return $currentstring;
1021: }
1022:
1023: #-- <kbd> tag (end tag required)
1024: sub start_kbd {
1025: my ($target,$token) = @_;
1026: my $currentstring = '';
1027: if ($target eq 'web' || $target eq 'webgrade') {
1028: $currentstring .= $token->[4];
1029: } elsif ($target eq 'tex') {
1030: $currentstring .= '\texttt{';
1031: }
1032: return $currentstring;
1033: }
1034:
1035: sub end_kbd {
1036: my ($target,$token) = @_;
1037: my $currentstring = '';
1038: if ($target eq 'web' || $target eq 'webgrade') {
1039: $currentstring .= $token->[2];
1040: } elsif ($target eq 'tex') {
1041: $currentstring .= '}';
1042: }
1043: return $currentstring;
1044: }
1045:
1046: #-- <code> tag (end tag required)
1047: sub start_code {
1048: my ($target,$token) = @_;
1049: my $currentstring = '';
1050: if ($target eq 'web' || $target eq 'webgrade') {
1051: $currentstring .= $token->[4];
1052: } elsif ($target eq 'tex') {
1053: $currentstring .= '\texttt{';
1054: }
1055: return $currentstring;
1056: }
1057:
1058: sub end_code {
1059: my ($target,$token) = @_;
1060: my $currentstring = '';
1061: if ($target eq 'web' || $target eq 'webgrade') {
1062: $currentstring .= $token->[2];
1063: } elsif ($target eq 'tex') {
1064: $currentstring .= '}';
1065: }
1066: return $currentstring;
1067: }
1068:
1069: #-- <em> tag (end tag required)
1070: sub start_em {
1071: my ($target,$token) = @_;
1072: my $currentstring = '';
1073: if ($target eq 'web' || $target eq 'webgrade') {
1074: $currentstring .= $token->[4];
1075: } elsif ($target eq 'tex') {
1076: $currentstring .= '\emph{';
1077: }
1078: return $currentstring;
1079: }
1080:
1081: sub end_em {
1082: my ($target,$token) = @_;
1083: my $currentstring = '';
1084: if ($target eq 'web' || $target eq 'webgrade') {
1085: $currentstring .= $token->[2];
1086: } elsif ($target eq 'tex') {
1087: $currentstring .= '}';
1088: }
1089: return $currentstring;
1090: }
1091:
1092: #-- <q> tag (end tag required)
1093: sub start_q {
1094: my ($target,$token) = @_;
1095: my $currentstring = '';
1096: if ($target eq 'web' || $target eq 'webgrade') {
1097: $currentstring .= $token->[4];
1098: } elsif ($target eq 'tex') {
1099: $currentstring .= '\emph{';
1100: }
1101: return $currentstring;
1102: }
1103:
1104: sub end_q {
1105: my ($target,$token) = @_;
1106: my $currentstring = '';
1107: if ($target eq 'web' || $target eq 'webgrade') {
1108: $currentstring .= $token->[2];
1109: } elsif ($target eq 'tex') {
1110: $currentstring .= '}';
1111: }
1112: return $currentstring;
1113: }
1114:
1115: # <p> is a bit strange since it does not require a closing </p>
1116: # However in latex, we must often output closing stuff to end
1117: # environments and {}'s etc. Therefore we do all the work
1118: # of figuring out the ending strings in the start tag processing,
1119: # and provide a mechanism to output the stop text external
1120: # to tag processing.
1121: #
1122: {
1123:
1124: my $closing_string = ''; # String required to close <p>
1125:
1126: # Some tags are <p> fragile meaning that <p> inside of them
1127: # does not work within TeX mode. This is managed via the
1128: # counter below:
1129: #
1130:
1131: my $para_disabled = 0;
1132:
1133: sub disable_para {
1134: $para_disabled++;
1135: }
1136: sub enable_para {
1137: $para_disabled--;
1138: }
1139:
1140:
1141: #-- <p> tag (end tag optional)
1142: #optional attribute - align="center|left|right"
1143: sub start_p {
1144: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1145: my $currentstring = '';
1146: if ($target eq 'web' || $target eq 'webgrade') {
1147: $currentstring .= &end_p(); # close off prior para if in progress.
1148: $currentstring .= $token->[4];
1149: if (! ($currentstring =~ /\//)) {
1150: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1151: }
1152: } elsif ($target eq 'tex' && !$para_disabled) {
1153:
1154: $currentstring .= &end_p(); # close off prior para if in progress.
1155: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1156: if ($align eq 'center') {
1157: $currentstring .='\begin{center}\par ';
1158: $closing_string = '\end{center}';
1159: if (&is_inside_of($tagstack, "table")) {
1160: $currentstring = ¢er_correction().$currentstring;
1161: }
1162: } elsif ($align eq 'right') {
1163: $currentstring.="\n".'{\flushright ';
1164: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1165: $closing_string= "}\n";
1166: } elsif ($align eq 'left') {
1167: $currentstring.= "\n".'{\flushleft ';
1168: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1169: $closing_string = "}\n";
1170: } else {
1171: $currentstring.='\par ';
1172: if (&is_inside_of($tagstack, 'table')) {
1173: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1174: } else {
1175: $closing_string = '\strut\\\\\strut ';
1176: }
1177: }
1178:
1179: }
1180: return $currentstring;
1181: }
1182: #
1183: # End paragraph processing just requires that we output the
1184: # closing string that was saved and blank it.
1185: sub end_p {
1186: # Note only 'tex' mode uses disable_para and enable_para
1187: # so we don't need to know the target in the check below:
1188:
1189: if (!$para_disabled) {
1190: my $current_string = $closing_string;
1191: $closing_string = ''; # Not in a para anymore.
1192: return $current_string;
1193: } else {
1194: return '';
1195: }
1196:
1197: }
1198: }
1199: #-- <br> tag (end tag forbidden)
1200: sub start_br {
1201: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1202: my $currentstring = '';
1203: if ($target eq 'web' || $target eq 'webgrade') {
1204: $currentstring .= $token->[4];
1205: } elsif ($target eq 'tex') {
1206: my @tempo=@$tagstack;
1207: my $signal=0;
1208: # Not going to factor this to is_inside_of since that would require
1209: # multiple stack traversals.
1210: #
1211: for (my $i=$#tempo;$i>=0;$i--) {
1212: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1213: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1214: $signal=1;
1215: }
1216: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1217: my $colspan =
1218: &Apache::lonxml::get_param('colspan', $parstack,
1219: $safeeval, $i, 0);
1220: if ($colspan) {
1221: $signal = 2;
1222: } else {
1223: $signal = 1;
1224: }
1225: }
1226: }
1227: if ($signal eq 1) {
1228: $currentstring .= ' \vskip 0 mm ';
1229: } elsif ($signal eq '2') {
1230: # multicol doesn't like blank lines
1231: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1232: $currentstring .= '\strut \\\\ \strut ';
1233: }
1234: }
1235: return $currentstring;
1236: }
1237:
1238: sub end_br {
1239: my ($target,$token) = @_;
1240: my $currentstring = '';
1241: if ($target eq 'web' || $target eq 'webgrade') {
1242: $currentstring .= $token->[2];
1243: }
1244: return $currentstring;
1245: }
1246:
1247: #-- <big> tag (end tag required)
1248: sub start_big {
1249: my ($target,$token) = @_;
1250: my $currentstring = '';
1251: if ($target eq 'web' || $target eq 'webgrade') {
1252: $currentstring .= $token->[4];
1253: } elsif ($target eq 'tex') {
1254: $currentstring .= '{\large ';
1255: }
1256: return $currentstring;
1257: }
1258:
1259: sub end_big {
1260: my ($target,$token) = @_;
1261: my $currentstring = '';
1262: if ($target eq 'web' || $target eq 'webgrade') {
1263: $currentstring .= $token->[2];
1264: } elsif ($target eq 'tex') {
1265: $currentstring .= '}';
1266: }
1267: return $currentstring;
1268: }
1269:
1270: #-- <small> tag (end tag required)
1271: sub start_small {
1272: my ($target,$token) = @_;
1273: my $currentstring = '';
1274: if ($target eq 'web' || $target eq 'webgrade') {
1275: $currentstring .= $token->[4];
1276: } elsif ($target eq 'tex') {
1277: $currentstring .= '{\footnotesize ';
1278: }
1279: return $currentstring;
1280: }
1281:
1282: sub end_small {
1283: my ($target,$token) = @_;
1284: my $currentstring = '';
1285: if ($target eq 'web' || $target eq 'webgrade') {
1286: $currentstring .= $token->[2];
1287: } elsif ($target eq 'tex') {
1288: $currentstring .= '}';
1289: }
1290: return $currentstring;
1291: }
1292:
1293: #-- <basefont> tag (end tag forbidden)
1294: sub start_basefont {
1295: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1296: my $currentstring = '';
1297: if ($target eq 'web' || $target eq 'webgrade') {
1298: $currentstring = $token->[4];
1299: } elsif ($target eq 'tex') {
1300: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1301: if (defined $basesize) {
1302: $currentstring = '{\\'.$basesize.' ';
1303: }
1304: }
1305: return $currentstring;
1306: }
1307:
1308: sub end_basefont {
1309: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1310: my $currentstring = '';
1311: if ($target eq 'web' || $target eq 'webgrade') {
1312: $currentstring = $token->[4];
1313: } elsif ($target eq 'tex') {
1314: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1315: if (defined $basesize) {
1316: $currentstring = '}';
1317: }
1318: }
1319: return $currentstring;
1320: }
1321:
1322: #-- <font> tag (end tag required)
1323: sub start_font {
1324: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1325: my $currentstring = '';
1326: if ($target eq 'web' || $target eq 'webgrade') {
1327: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1328: if ($face!~/symbol/i) {
1329: if (($env{'browser.fontenhance'} eq 'on') ||
1330: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1331: }
1332: $currentstring = $token->[4];
1333: } elsif ($target eq 'tex') {
1334: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1335: if (defined $fontsize) {
1336: $currentstring = '{\\'.$fontsize.' ';
1337: }
1338: }
1339: return $currentstring;
1340: }
1341:
1342: sub end_font {
1343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1344: my $currentstring = '';
1345: if ($target eq 'web' || $target eq 'webgrade') {
1346: $currentstring = $token->[2];
1347: } elsif ($target eq 'tex') {
1348: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1349: if (defined $fontsize) {
1350: $currentstring = '}';
1351: }
1352: }
1353: return $currentstring;
1354: }
1355:
1356: #-- <strike> tag (end tag required)
1357: sub start_strike {
1358: my ($target,$token) = @_;
1359: my $currentstring = '';
1360: if ($target eq 'web' || $target eq 'webgrade') {
1361: $currentstring .= $token->[4];
1362: } elsif ($target eq 'tex') {
1363: &Apache::lonxml::startredirection();
1364: }
1365: return $currentstring;
1366: }
1367:
1368: sub end_strike {
1369: my ($target,$token) = @_;
1370: my $currentstring = '';
1371: if ($target eq 'web' || $target eq 'webgrade') {
1372: $currentstring .= $token->[2];
1373: } elsif ($target eq 'tex') {
1374: $currentstring=&Apache::lonxml::endredirection();
1375: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1376: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1377: $currentstring=~s/(\S)\s*$/$1\}/;
1378: }
1379: return $currentstring;
1380: }
1381:
1382: #-- <s> tag (end tag required)
1383: sub start_s {
1384: my ($target,$token) = @_;
1385: my $currentstring = '';
1386: if ($target eq 'web' || $target eq 'webgrade') {
1387: $currentstring .= $token->[4];
1388: } elsif ($target eq 'tex') {
1389: &Apache::lonxml::startredirection();
1390: }
1391: return $currentstring;
1392: }
1393:
1394: sub end_s {
1395: my ($target,$token) = @_;
1396: my $currentstring = '';
1397: if ($target eq 'web' || $target eq 'webgrade') {
1398: $currentstring .= $token->[2];
1399: } elsif ($target eq 'tex') {
1400: $currentstring=&Apache::lonxml::endredirection();
1401: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1402: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1403: $currentstring=~s/(\S)\s*$/$1\}/;
1404: }
1405: return $currentstring;
1406: }
1407:
1408: #-- <sub> tag (end tag required)
1409: sub start_sub {
1410: my ($target,$token) = @_;
1411: my $currentstring = '';
1412: if ($target eq 'web' || $target eq 'webgrade') {
1413: $currentstring .= $token->[4];
1414: } elsif ($target eq 'tex') {
1415: $currentstring .= '\ensuremath{_{';
1416: }
1417: return $currentstring;
1418: }
1419:
1420: sub end_sub {
1421: my ($target,$token) = @_;
1422: my $currentstring = '';
1423: if ($target eq 'web' || $target eq 'webgrade') {
1424: $currentstring .= $token->[2];
1425: } elsif ($target eq 'tex') {
1426: $currentstring .= '}}';
1427: }
1428: return $currentstring;
1429: }
1430:
1431: #-- <sup> tag (end tag required)
1432: sub start_sup {
1433: my ($target,$token) = @_;
1434: my $currentstring = '';
1435: if ($target eq 'web' || $target eq 'webgrade') {
1436: $currentstring .= $token->[4];
1437: } elsif ($target eq 'tex') {
1438: $currentstring .= '\ensuremath{^{';
1439: }
1440: return $currentstring;
1441: }
1442:
1443: sub end_sup {
1444: my ($target,$token) = @_;
1445: my $currentstring = '';
1446: if ($target eq 'web' || $target eq 'webgrade') {
1447: $currentstring .= $token->[2];
1448: } elsif ($target eq 'tex') {
1449: $currentstring .= '}}';
1450: }
1451: return $currentstring;
1452: }
1453:
1454: #-- <hr> tag (end tag forbidden)
1455: sub start_hr {
1456: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1457: my $currentstring = &end_p(); # End enclosing para.
1458: if ($target eq 'web' || $target eq 'webgrade') {
1459: $currentstring .= $token->[4];
1460: } elsif ($target eq 'tex') {
1461: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1462: if (defined $LaTeXwidth) {
1463: if ($LaTeXwidth=~/^%/) {
1464: substr($LaTeXwidth,0,1)='';
1465: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1466: }
1467: } else {
1468: $LaTeXwidth ='0.9\textwidth';
1469: }
1470: my ($pre,$post);
1471: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1472: if (($align eq 'center') || (not defined $align)) {
1473: $pre=''; $post='';
1474: } elsif ($align eq 'left') {
1475: $pre='\rlap{'; $post='} \hfill';
1476: } elsif ($align eq 'right') {
1477: $pre=' \hfill \llap{'; $post='}';
1478: }
1479: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1480: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1481: }
1482: return $currentstring;
1483: }
1484:
1485: sub end_hr {
1486: my ($target,$token) = @_;
1487: my $currentstring = '';
1488: if ($target eq 'web' || $target eq 'webgrade') {
1489: $currentstring .= $token->[2];
1490: }
1491: return $currentstring;
1492: }
1493:
1494: #-- <div> tag (end tag required)
1495: {
1496:
1497: # Since div can be nested, the stack below is used
1498: # in 'tex' mode to store the ending strings
1499: # for the div stack.
1500:
1501: my @div_end_stack;
1502:
1503: sub start_div {
1504: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1505: my $currentstring = &end_p(); # Close enclosing para.
1506: if ($target eq 'web' || $target eq 'webgrade') {
1507: $currentstring .= $token->[4];
1508: }
1509: if ($target eq 'tex') {
1510: # 4 possible alignments: left, right, center, and -missing-.
1511:
1512: my $endstring = '';
1513:
1514: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1515: $safeeval, undef, 1));
1516: if ($align eq 'center') {
1517: $currentstring .= '\begin{center}';
1518: $endstring = '\end{center}';
1519: if (&is_inside_of($tagstack, "table")) {
1520: $currentstring = ¢er_correction().$currentstring;
1521: }
1522: }
1523: elsif ($align eq 'right') {
1524: $currentstring .= '\begin{flushright}';
1525: $endstring .= '\end{flushright}';
1526: } elsif ($align eq 'left') {
1527: $currentstring .= '\begin{flushleft}';
1528: $endstring = '\end{flushleft}';
1529: } else {
1530:
1531: }
1532: $currentstring .= "\n"; # For human readability.
1533: $endstring = "\n$endstring\n"; # For human readability
1534: push(@div_end_stack, $endstring);
1535: }
1536: return $currentstring;
1537: }
1538:
1539: sub end_div {
1540: my ($target,$token) = @_;
1541: my $currentstring = '';
1542: if ($target eq 'web' || $target eq 'webgrade') {
1543: $currentstring .= $token->[2];
1544: }
1545: if ($target eq 'tex') {
1546: my $endstring = pop @div_end_stack;
1547: $currentstring .= $endstring;
1548: }
1549: return $currentstring;
1550: }
1551: }
1552:
1553: #-- <a> tag (end tag required)
1554: sub start_a {
1555: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1556: my $currentstring = '';
1557: if ($target eq 'web' || $target eq 'webgrade') {
1558: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1559: undef,1);
1560: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1561: } elsif ($target eq 'tex') {
1562: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1563: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1564: if ($a=~/\S/) {
1565: $a=~s/([^\\])%/$1\\\%/g;
1566: $currentstring .= '\ref{URI: '.$a.'}';
1567: } elsif ($b=~/\S/) {
1568: $currentstring .= '\ref{Anchor: '.$b.'}';
1569: } else {
1570: $currentstring.='';
1571: }
1572: }
1573: return $currentstring;
1574: }
1575:
1576: sub end_a {
1577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1578: my $currentstring = '';
1579: if ($target eq 'web' || $target eq 'webgrade') {
1580: $currentstring .= $token->[2];
1581: }
1582: return $currentstring;
1583: }
1584:
1585: #-- <li> tag (end tag optional)
1586: sub start_li {
1587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1588: my $currentstring = '';
1589: if ($target eq 'web' || $target eq 'webgrade') {
1590: $currentstring = $token->[4];
1591: } elsif ($target eq 'tex') {
1592: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1593: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1594: #FIXME need to support types i and I
1595: if ($type=~/disc/) {
1596: $currentstring .= ' \item[$\bullet$] ';
1597: } elsif ($type=~/circle/) {
1598: $currentstring .= ' \item[$\circ$] ';
1599: } elsif ($type=~/square/) {
1600: $currentstring .= ' \item[$\diamond$] ';
1601: } elsif ($type eq '1') {
1602: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1603: } elsif ($type eq 'A') {
1604: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1605: } elsif ($type eq 'a') {
1606: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1607: } elsif ($value ne '') {
1608: $currentstring .= ' \item['.$value.'] ';
1609: } else {
1610: $currentstring .= ' \item ';
1611: }
1612: $Apache::londefdef::list_index++;
1613: }
1614: return $currentstring;
1615: }
1616:
1617: sub end_li {
1618: my ($target,$token) = @_;
1619: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1620: if ($target eq 'web' || $target eq 'webgrade') {
1621: $currentstring .= $token->[2];
1622: }
1623: return $currentstring;
1624: }
1625:
1626: #-- <u> tag (end tag required)
1627: sub start_u {
1628: my ($target,$token) = @_;
1629: my $currentstring = '';
1630: if ($target eq 'web' || $target eq 'webgrade') {
1631: $currentstring .= $token->[4];
1632: } elsif ($target eq 'tex') {
1633: &Apache::lonxml::startredirection();
1634: }
1635: return $currentstring;
1636: }
1637:
1638: sub end_u {
1639: my ($target,$token) = @_;
1640: my $currentstring = '';
1641: if ($target eq 'web' || $target eq 'webgrade') {
1642: $currentstring .= $token->[2];
1643: } elsif ($target eq 'tex') {
1644: $currentstring=&Apache::lonxml::endredirection();
1645: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1646: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1647: $currentstring=~s/(\S)\s*$/$1\}/;
1648: }
1649: return $currentstring;
1650: }
1651:
1652: #-- <ul> tag (end tag required)
1653: sub start_ul {
1654: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1655: my $currentstring = &end_p(); # Close off enclosing list.
1656: if ($target eq 'web' || $target eq 'webgrade') {
1657: $currentstring .= $token->[4];
1658: } elsif ($target eq 'tex') {
1659: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1660: $Apache::londefdef::list_index=0;
1661: if ($TeXtype eq 'disc') {
1662: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1663: '\renewcommand{\labelitemii}{$\bullet$}'.
1664: '\renewcommand{\labelitemiii}{$\bullet$}'.
1665: '\renewcommand{\labelitemiv}{$\bullet$}';
1666: } elsif ($TeXtype eq 'circle') {
1667: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1668: '\renewcommand{\labelitemii}{$\circ$}'.
1669: '\renewcommand{\labelitemiii}{$\circ$}'.
1670: '\renewcommand{\labelitemiv}{$\circ$}';
1671: } elsif ($TeXtype eq 'square') {
1672: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1673: '\renewcommand{\labelitemii}{$\diamond$}'.
1674: '\renewcommand{\labelitemiii}{$\diamond$}'.
1675: '\renewcommand{\labelitemiv}{$\diamond$}';
1676: }
1677: $currentstring .= '\strut \begin{itemize}';
1678: }
1679: return $currentstring;
1680: }
1681:
1682: sub end_ul {
1683: my ($target,$token) = @_;
1684: my $currentstring = '';
1685: if ($target eq 'web' || $target eq 'webgrade') {
1686: $currentstring = $token->[2];
1687: } elsif ($target eq 'tex') {
1688: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1689: '\renewcommand{\labelitemii}{$\bullet$}'.
1690: '\renewcommand{\labelitemiii}{$\bullet$}'.
1691: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1692: }
1693: return $currentstring;
1694: }
1695:
1696: #-- <menu> tag (end tag required)
1697: sub start_menu {
1698: my ($target,$token) = @_;
1699: my $currentstring = '';
1700: if ($target eq 'web' || $target eq 'webgrade') {
1701: $currentstring = $token->[4];
1702: } elsif ($target eq 'tex') {
1703: $currentstring = " \\begin{itemize} ";
1704: }
1705: return $currentstring;
1706: }
1707:
1708: sub end_menu {
1709: my ($target,$token) = @_;
1710: my $currentstring = '';
1711: if ($target eq 'web' || $target eq 'webgrade') {
1712: $currentstring = $token->[2];
1713: } elsif ($target eq 'tex') {
1714: $currentstring = " \\end{itemize}";
1715: }
1716: return $currentstring;
1717: }
1718:
1719: #-- <dir> tag (end tag required)
1720: sub start_dir {
1721: my ($target,$token) = @_;
1722: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1723: if ($target eq 'web' || $target eq 'webgrade') {
1724: $currentstring .= $token->[4];
1725: } elsif ($target eq 'tex') {
1726: $currentstring .= " \\begin{itemize} ";
1727: }
1728: return $currentstring;
1729: }
1730:
1731: sub end_dir {
1732: my ($target,$token) = @_;
1733: my $currentstring = '';
1734: if ($target eq 'web' || $target eq 'webgrade') {
1735: $currentstring = $token->[2];
1736: } elsif ($target eq 'tex') {
1737: $currentstring = " \\end{itemize}";
1738: }
1739: return $currentstring;
1740: }
1741:
1742: #-- <ol> tag (end tag required)
1743: sub start_ol {
1744: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1745: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1746: if ($target eq 'web' || $target eq 'webgrade') {
1747: $currentstring .= $token->[4];
1748: } elsif ($target eq 'tex') {
1749: $Apache::londefdef::list_index=0;
1750: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1751: if ($type eq '1') {
1752: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1753: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1754: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1755: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1756: } elsif ($type eq 'A') {
1757: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1758: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1759: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1760: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1761: } elsif ($type eq 'a') {
1762: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1763: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1764: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1765: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1766: } elsif ($type eq 'i') {
1767: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1768: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1769: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1770: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1771: } elsif ($type eq 'I') {
1772: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1773: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1774: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1775: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1776: }
1777: $currentstring .= '\strut \begin{enumerate}';
1778: }
1779: return $currentstring;
1780: }
1781:
1782: sub end_ol {
1783: my ($target,$token) = @_;
1784: my $currentstring = '';
1785: if ($target eq 'web' || $target eq 'webgrade') {
1786: $currentstring = $token->[2];
1787: } elsif ($target eq 'tex') {
1788: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1789: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1790: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1791: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1792: }
1793: return $currentstring;
1794: }
1795:
1796: #-- <dl> tag (end tag required)
1797: sub start_dl {
1798: my ($target,$token) = @_;
1799: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1800: if ($target eq 'web' || $target eq 'webgrade') {
1801: $currentstring .= $token->[4];
1802: } elsif ($target eq 'tex') {
1803: $currentstring .= '\begin{description}';
1804: $Apache::londefdef::DL++;
1805: push(@Apache::londefdef::description,[]);
1806: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1807: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1808: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1809: }
1810: return $currentstring;
1811: }
1812:
1813: sub end_dl {
1814: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1815: my $currentstring = '';
1816: if ($target eq 'web' || $target eq 'webgrade') {
1817: $currentstring = $token->[2];
1818: } elsif ($target eq 'tex') {
1819: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1820: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1821: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1822: $currentstring.=' '.$element.' ';
1823: }
1824: pop(@Apache::londefdef::description);
1825: $currentstring.='\end{description}';
1826: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1827: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1828: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1829: $Apache::londefdef::DL--;
1830: }
1831: return $currentstring;
1832: }
1833:
1834: #-- <dt> tag (end tag optional)
1835: sub start_dt {
1836: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1837: my $currentstring='';
1838: if ($target eq 'web' || $target eq 'webgrade') {
1839: $currentstring = $token->[4];
1840: } elsif ($target eq 'tex') {
1841: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1842: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1843: &Apache::lonxml::startredirection();
1844: $Apache::londefdef::DT[-1]++;
1845: $Apache::londefdef::seenDT[-1]=1;
1846: }
1847: return $currentstring;
1848: }
1849:
1850: sub end_dt {
1851: my ($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]) {
1857: my $data=&item_cleanup();
1858: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1859: $Apache::londefdef::DT[-1]--;
1860: }
1861: }
1862: return $currentstring;
1863: }
1864:
1865: sub item_cleanup {
1866: my $item=&Apache::lonxml::endredirection();
1867: $item=~s/\\begin{center}//g;
1868: $item=~s/\\end{center}//g;
1869: return $item;
1870: }
1871:
1872: #-- <dd> tag (end tag optional)
1873: sub start_dd {
1874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1875: my $currentstring = '';
1876: if ($target eq 'web' || $target eq 'webgrade') {
1877: $currentstring = $token->[4];
1878: } elsif ($target eq 'tex') {
1879: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1880: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1881: if (!$Apache::londefdef::seenDT[-1]) {
1882: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1883: }
1884: push(@{$Apache::londefdef::description[-1]},'');
1885: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1886: $Apache::londefdef::DD[-1]++;
1887: &Apache::lonxml::startredirection();
1888: }
1889: return $currentstring;
1890: }
1891:
1892: sub end_dd {
1893: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1894: my $currentstring = '';
1895: if ($target eq 'web' || $target eq 'webgrade') {
1896: $currentstring = $token->[2];
1897: } elsif ($target eq 'tex') {
1898: $Apache::londefdef::description[-1]->[-1].=
1899: &Apache::lonxml::endredirection().' \vskip 0mm ';
1900: $Apache::londefdef::DD[-1]--;
1901: }
1902: return $currentstring;
1903: }
1904:
1905: #-- <table> tag (end tag required)
1906: # <table> also ends any prior <p> that is not closed.
1907: # but, unless I allow <p>'s to nest, that's the
1908: # only way I could think of to allow <p> in
1909: # <tr> <th> bodies
1910: #
1911: #list of supported attributes: border,width,TeXwidth
1912: sub start_table {
1913: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1914: my $textwidth = '';
1915: my $currentstring = &end_p();
1916: if ($target eq 'web' || $target eq 'webgrade') {
1917: $currentstring .= $token->[4];
1918: } elsif ($target eq 'tex') {
1919: my $aa = {};
1920: push @Apache::londefdef::table, $aa;
1921: $Apache::londefdef::table[-1]{'row_number'} = -1;
1922: #maximum table's width (default coincides with text line length)
1923: if ($#Apache::londefdef::table==0) {
1924: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1925: $textwidth=~/(\d+\.?\d*)/;
1926: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1927: } else {
1928: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1929: #the maximum width of nested table is determined by LATeX width of parent cell
1930: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1931: } else {
1932: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1933: $textwidth=$Apache::londefdef::table[-2]{'width'};
1934: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1935: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1936: }
1937: }
1938: }
1939:
1940: # width either comes forced from the TeXwidth or the width parameters.
1941: # in either case it can be a percentage or absolute width.
1942: # in the width case we ignore absolute width
1943: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1944: if (!defined($TeXwidth)) {
1945: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1946: $safeeval,undef,1);
1947: if ($htmlwidth =~ /%/) {
1948: $TeXwidth = $htmlwidth;
1949: } else {
1950: $TeXwidth = $textwidth;
1951: }
1952: } else {
1953: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1954: }
1955: if ($TeXwidth=~/%/) {
1956: $Apache::londefdef::table[-1]{'percent'}=1;
1957: $TeXwidth=~/(\d+)/;
1958: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1959: } else {
1960: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1961: }
1962: # In the end, however the table width cannot be wider than $textwidth...
1963:
1964: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1965: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1966: }
1967:
1968: #table's border
1969: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1970: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1971: unless (defined $border) { $border = 0; }
1972: if ($border) {
1973: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1974: $Apache::londefdef::table[-1]{'vinc'} = '&';
1975: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1976: } else {
1977: $Apache::londefdef::table[-1]{'hinc'} = '';
1978: $Apache::londefdef::table[-1]{'vinc'} = '&';
1979: $Apache::londefdef::table[-1]{'vvinc'} = '';
1980: }
1981: if ($#Apache::londefdef::table==0) {
1982: # Note that \newline seems to destroy the alignment envs.
1983: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1984: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1985: }
1986: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1987: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1988: $Apache::londefdef::table[-1]{'objectlen'}=[];
1989: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1990: $Apache::londefdef::table[-1]{'maxlen'}=[];
1991: $Apache::londefdef::table[-1]{'minlen'}=[];
1992: $Apache::londefdef::table[-1]{'content'}=[];
1993: $Apache::londefdef::table[-1]{'align'}=[];
1994: $currentstring.='\keephidden{NEW TABLE ENTRY}';
1995:
1996:
1997: }
1998: return $currentstring;
1999: }
2000:
2001: sub end_table {
2002: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2003: my $currentstring = '';
2004: if ($target eq 'web' || $target eq 'webgrade') {
2005: $currentstring = $token->[2];
2006: } elsif ($target eq 'tex') {
2007: my $inmemory = '';
2008: my $output = '';
2009: my $WARNING='';
2010: #width of columns from TeXwidth attributes
2011:
2012: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2013: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2014: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2015: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2016: }
2017: }
2018: }
2019: #free space and number of empty columns
2020: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2021: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2022: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2023: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2024: $empty_columns++;
2025: } else {
2026: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2027: }
2028: }
2029: #boundaries for contents columns
2030: my @min_len=();#columns can not be narrower
2031: my @max_len=();#maximum length of column
2032: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2033: my ($localmin,$localmax)=(0,0);
2034: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2035: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2036: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2037: }
2038: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2039: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2040: }
2041: }
2042: push @min_len, $localmin;
2043: push @max_len, $localmax;
2044: }
2045: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2046: my $localmin=0,;
2047: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2048: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2049: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2050: }
2051: }
2052: if ($max_len[$jn]<$localmin) {
2053: $max_len[$jn]=$localmin;
2054: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2055: }#object size is bigger
2056: if ($min_len[$jn]<$localmin) {
2057: $min_len[$jn]=$localmin;
2058: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2059: }#object size is bigger
2060: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2061: $min_len[$jn]=0;
2062: $max_len[$jn]=0;
2063: }
2064: }
2065: #final adjustment of column width
2066: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2067: my @adjust=();
2068: #step 1. adjustment by maximum value
2069: my $space_neeeded=0;
2070: for (my $jn=0;$jn<=$#max_len;$jn++) {
2071: $space_neeeded=$space_neeeded+$max_len[$jn];
2072: }
2073: if ($space_neeeded<=$available_space) {
2074: for (my $jn=0;$jn<=$#max_len;$jn++) {
2075: if ($fwidth[$jn]==0) {
2076: $fwidth[$jn]=$max_len[$jn];
2077: }
2078: }
2079: } else {
2080: #step 2. adjustment by minimum value (estimation)
2081: $space_neeeded=0;
2082: for (my $jn=0;$jn<=$#min_len;$jn++) {
2083: $space_neeeded+=$min_len[$jn];
2084: }
2085: if ($space_neeeded>$available_space) {
2086: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2087: for (my $jn=0;$jn<=$#max_len;$jn++) {
2088: if ($fwidth[$jn]==0) {
2089: $fwidth[$jn]=$min_len[$jn];
2090: }
2091: }
2092: #check if we have objects which can be scaled
2093: my $how_many_to_scale=0;
2094: my @to_scale=();
2095: for (my $jn=0;$jn<=$#max_len;$jn++) {
2096: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2097: $how_many_to_scale++;
2098: push @to_scale, $jn;
2099: }
2100: }
2101: if ($how_many_to_scale>0) {
2102: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2103: foreach my $jn (@to_scale) {
2104: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2105: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2106: if ($1 ne '') {
2107: my $current_length=&recalc($1);
2108: $current_length=~/(\d+\.?\d*)/;
2109: $current_length=$current_length-$space_to_adjust;
2110: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2111: }
2112: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2113: if ($1 ne '') {
2114: my $current_length=$1;
2115: $current_length=$current_length-$space_to_adjust;
2116: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2117: }
2118: }
2119: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2120: }
2121: }
2122: } else {
2123: #step 3. adjustment over minimal + corrections
2124: my $enlarge_coef=$available_space/$space_neeeded;
2125: my $acsessive=0;
2126: for (my $jn=0;$jn<=$#min_len;$jn++) {
2127: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2128: if ($adjust[$jn]>$max_len[$jn]) {
2129: $fwidth[$jn]=$max_len[$jn];
2130: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2131: $adjust[$jn]=0;
2132: }
2133: }
2134: if ($acsessive>0) {
2135: #we have an excess of space and can redistribute it
2136: my $notempty_columns=0;
2137: for (my $jn=0;$jn<=$#min_len;$jn++) {
2138: if ($adjust[$jn]!=0) {
2139: $notempty_columns++;
2140: }
2141: }
2142: my $per_column=$acsessive/$notempty_columns;
2143: for (my $jn=0;$jn<=$#min_len;$jn++) {
2144: if ($adjust[$jn]!=0) {
2145: $adjust[$jn]+=$per_column;
2146: $fwidth[$jn]=$adjust[$jn];
2147: }
2148: }
2149: } else {
2150: for (my $jn=0;$jn<=$#min_len;$jn++) {
2151: $fwidth[$jn]=$adjust[$jn];
2152: }
2153: }
2154: }
2155: }
2156: #use all available width if it is defined in % or as TeXwidth
2157: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2158: my $current=0;
2159: for (my $i=0;$i<=$#fwidth;$i++) {
2160: $current+=$fwidth[$i];
2161: }
2162: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2163: for (my $i=0;$i<=$#fwidth;$i++) {
2164: $fwidth[$i]*=$coef;
2165: }
2166: }
2167: #removing of empty columns if allowed
2168: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2169: if ($permission eq 'yes') {
2170: my @cleaned_table=();
2171: my @cleaned_header=();
2172: my $colind=0;
2173: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2174: if ($fwidth[$jn]!=0) {
2175: #we need to copy column
2176: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2177: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2178: $cleaned_header[$colind]=$fwidth[$jn];
2179: }
2180: $colind++;
2181: }
2182: }
2183: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2184: @fwidth=@cleaned_header;
2185: }
2186: #construct header of the table
2187: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2188: for (my $in=0;$in<=$#fwidth;$in++) {
2189: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2190: }
2191: $header_of_table .= '}';
2192: #fill the table
2193: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2194: my $have_rowspan = 0;
2195: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2196:
2197: #-----------------------------------------------------------
2198: # I think this order of doing things will ensure that
2199: # single rowspan, columspan and combined row/colspans will
2200: # work correctly. LaTeX is delicate here.
2201: # RF.
2202:
2203: # Start a rowspan if necessary:
2204:
2205: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2206: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2207: #
2208: # Do the appropriate magic if this has a colspan
2209: #
2210:
2211: if ($colspan > 1) {
2212: $output .= '\multicolumn{'.
2213: $colspan
2214: .'}{|l|}{';
2215: }
2216:
2217: if ($rowspan > 1) {
2218: $have_rowspan++;
2219: $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
2220: }
2221: if (($rowspan eq '^') || ($rowspan eq '_')) {
2222: $have_rowspan++;
2223: }
2224: #--------------------------------------------------------------
2225:
2226: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2227: $output.=¢er_correction().'\begin{center}';
2228: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2229: $output.=' \hfill \llap{'
2230: }
2231: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2232: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2233: $output.='\end{center}';
2234: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2235: $output.='} ';
2236: }
2237: # Close off any open multirow:
2238:
2239: if ($rowspan > 1) {
2240: $output .= '}';
2241: }
2242: # Close off the colspan...
2243: #
2244: if ($colspan > 1) {
2245: $output .= '}';
2246: $jn += $colspan-1; # Adjust for number of rows really left.
2247: }
2248: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2249: }
2250: # If have_rowspan > 0, and borders are on, then
2251: # we need to do more than put an \hline at the bottom of row.
2252: # we need to do the appropriate \cline to ensure that
2253: # the spanned rows don't have \hlines through them.
2254:
2255: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2256: $output .= ' \\\\ ';
2257: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2258: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2259: if ($rowspan ne "^") {
2260: if (($rowspan <= 1) || ($rowspan eq '_')) {
2261: my $column = $jn+1;
2262: $output .= '\cline{'.$column.'-'.$column.'} ';
2263: }
2264: }
2265: }
2266:
2267: } else {
2268: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2269: }
2270: }
2271: # Note that \newline destroys alignment env's produced by e.g. <div>
2272: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2273: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2274: if ($#Apache::londefdef::table > 0) {
2275: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2276: # Figure out max/and min width by summing us and then
2277: # apply that to the current column of the table we nest in
2278: # if it's larger than the current width or the current width
2279: # is undefined.
2280: #
2281: my $min_nested_width = 0;
2282: my $max_nested_width = 0;
2283: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2284: $min_nested_width += $min_len[$col];
2285: $max_nested_width += $max_len[$col];
2286:
2287: }
2288: # Fudge in an extra 5 mm for borders etc:
2289:
2290: $min_nested_width += 5;
2291: $max_nested_width += 5;
2292:
2293: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2294: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2295: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2296: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2297: }
2298: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2299: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2300: }
2301:
2302: pop @Apache::londefdef::table;
2303: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2304: } else {
2305: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2306: pop @Apache::londefdef::table;
2307: undef @Apache::londefdef::table;
2308: }
2309: }
2310: return $currentstring;
2311: }
2312:
2313: #-- <tr> tag (end tag optional)
2314: sub start_tr {
2315: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2316: my $currentstring = '';
2317: if ($target eq 'web' || $target eq 'webgrade') {
2318: $currentstring = $token->[4];
2319: } elsif ($target eq 'tex') {
2320: $Apache::londefdef::table[-1]{'row_number'}++;
2321: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2322: if ($alignchar ne '') {
2323: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2324: } else {
2325: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2326: }
2327: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2328: #
2329: # Need to save the number of table columns to preserve the max # columns.
2330: #
2331: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2332: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2333: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2334: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2335: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2336: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2337: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2338: }
2339: return $currentstring;
2340: }
2341:
2342: sub end_tr {
2343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2344: my $currentstring = &end_p(); # Close any pending <p> in the row.
2345: if ($target eq 'web' || $target eq 'webgrade') {
2346: $currentstring .= $token->[2];
2347: } elsif ($target eq 'tex') {
2348: if ($Apache::londefdef::TD_redirection) {
2349: &end_td_tex($parstack,$parser,$safeeval);
2350: }
2351: # Counter columns must be the maximum number of columns seen
2352: # in the table so far so:
2353: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2354: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2355: }
2356:
2357:
2358:
2359: }
2360: return $currentstring;
2361: }
2362:
2363: #-- <td> tag (end tag optional)
2364: sub start_td {
2365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2366: my $currentstring = '';
2367: if ($target eq 'web' || $target eq 'webgrade') {
2368: $currentstring = $token->[4];
2369: } elsif ($target eq 'tex') {
2370: $Apache::londefdef::TD_redirection = 1;
2371: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2372: }
2373: return $currentstring;
2374: }
2375:
2376: sub tag_check {
2377: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2378: my @ar=@$parstack;
2379: for (my $i=$#ar-1;$i>=0;$i--) {
2380: if (lc($$tagstack[$i]) eq $good_tag) {
2381: &start_td_tex($parstack,$parser,$safeeval);
2382: last;
2383: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2384: splice @ar, $i+1;
2385: &end_td_tex(\@ar,$parser,$safeeval);
2386: &start_td_tex($parstack,$parser,$safeeval);
2387: last;
2388: }
2389: }
2390: return '';
2391: }
2392:
2393: sub start_td_tex {
2394: my ($parstack,$parser,$safeeval) = @_;
2395: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2396: if ($alignchar eq '') {
2397: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2398: }
2399: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2400: $Apache::londefdef::table[-1]{'counter_columns'}++;
2401: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2402: if (defined $TeXwidth) {
2403: my $current_length=&recalc($TeXwidth);
2404: $current_length=~/(\d+\.?\d*)/;
2405: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2406: }
2407: &Apache::lonxml::startredirection();
2408: return '';
2409: }
2410:
2411: sub end_td_tex {
2412: my ($parstack,$parser,$safeeval) = @_;
2413: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2414: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2415: my $data = &Apache::lonxml::endredirection();
2416:
2417: # The rowspan array of the table indicates which cells are part of a span.
2418: # n indicates the start of a span set of n rows.
2419: # ^ indicates a cell that continues a span set.
2420: # _ indicates the cell is at the bottom of a span set.
2421: # If this and subsequent cells are part of a rowspan, we must
2422: # push along the row until we find one that is not.
2423:
2424: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2425: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2426: # Part of a span.
2427: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2428: $current_column++;
2429: }
2430: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2431:
2432:
2433: # Get the column and row spans.
2434: # Colspan can be done via \multicolumn if I can figure out the data structs.
2435:
2436: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2437: if (!$colspan) {
2438: $colspan = 1;
2439: }
2440:
2441: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2442: if (!$rowspan) {
2443: $rowspan = 1;
2444: }
2445:
2446:
2447:
2448: for (my $c = 0; $c < $colspan; $c++) {
2449: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2450: for (my $i = 1; $i < $rowspan; $i++) {
2451: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2452: if ($i == ($rowspan-1)) {
2453: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2454: }
2455: }
2456: }
2457:
2458: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2459: if (defined $TeXwidth) {
2460: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2461: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2462: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2463: } else {
2464: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2465: my $garbage_data=$data;
2466: my $fwidth=0;
2467: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2468: my $current_length=&recalc($1);
2469: $current_length=~/(\d+\.?\d*)/;
2470: if ($fwidth<$1) {$fwidth=$1;}
2471: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2472: }
2473: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2474: my $current_length=$1;
2475: if ($fwidth<$current_length) {$fwidth=$current_length;}
2476: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2477: }
2478: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2479: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2480: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2481: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2482: } elsif ($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)*/) {
2483: my $garbage_data=$data;
2484: my $fwidth=0;
2485: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2486: my $current_length=&recalc($1);
2487: $current_length=~/(\d+\.?\d*)/;
2488: if ($fwidth<$1) {$fwidth=$1;}
2489: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2490: }
2491: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2492: my $current_length=&recalc($1);
2493: $current_length=~/(\d+\.?\d*)/;
2494: if ($fwidth<$1) {$fwidth=$1;}
2495: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2496: }
2497: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2498: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2499: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2500: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2501: $data=~s/\\\\\s*$//;
2502: } else {
2503: $data=~s/^\s+(\S.*)/$1/;
2504: $data=~s/(.*\S)\s+$/$1/;
2505: $data=~s/(\s)+/$1/;
2506: my ($current_length,$min_length)=(0,0);
2507: if ($data=~/\\vskip/) {
2508: my $newdata=$data;
2509: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2510: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2511: foreach my $elementdata (@newdata) {
2512: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2513: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2514: my @words=split(/ /,$elementdata);
2515: foreach my $word (@words) {
2516: my $lengthword=2.5*&LATEX_length($word);
2517: if ($min_length<$lengthword) {$min_length=$lengthword;}
2518: }
2519: }
2520: } else {
2521: $current_length=2.5*&LATEX_length($data);
2522: my @words=split(/ /,$data);
2523: foreach my $word (@words) {
2524: my $lengthword=2*&LATEX_length($word);
2525: if ($min_length<$lengthword) {$min_length=$lengthword;}
2526: }
2527: }
2528: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2529: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2530: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2531: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2532: }
2533: }
2534: # Substitute all of the tables nested in this cell in their appropriate places.
2535:
2536:
2537: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2538: for (my $in=0; $in<=$nested_count; $in++) {
2539: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2540: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2541: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2542: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2543:
2544: }
2545: # Should be be killing off the 'include' elements as they're used up?
2546:
2547: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2548:
2549:
2550:
2551:
2552: # the colspan array will indicate how many columns will be spanned by this
2553: # cell..this requires that counter_columns also be adjusted accordingly
2554: # so that the next bunch of text goes in the right cell. Note that since
2555: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2556: #
2557:
2558: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2559: for (my $i = 0; $i < ($colspan -1); $i++) {
2560: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2561: }
2562: for (my $r = 0; $r < $rowspan; $r++) {
2563: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2564: # Put empty text in spanned cols.
2565:
2566: }
2567:
2568:
2569:
2570: return '';
2571: }
2572:
2573: sub end_td {
2574: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2575: my $currentstring = '';
2576: if ($target eq 'web' || $target eq 'webgrade') {
2577: $currentstring = $token->[2];
2578: } elsif ($target eq 'tex') {
2579: $Apache::londefdef::TD_redirection =0;
2580: &end_td_tex($parstack,$parser,$safeeval);
2581: }
2582: return $currentstring;
2583: }
2584:
2585: #-- <th> tag (end tag optional)
2586: sub start_th {
2587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2588: my $currentstring = '';
2589: if ($target eq 'web' || $target eq 'webgrade') {
2590: $currentstring = $token->[4];
2591: } elsif ($target eq 'tex') {
2592: $Apache::londefdef::TD_redirection = 1;
2593: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2594: }
2595: return $currentstring;
2596: }
2597:
2598: sub tagg_check {
2599: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2600: my @ar=@$parstack;
2601: for (my $i=$#ar-1;$i>=0;$i--) {
2602: if (lc($$tagstack[$i]) eq $good_tag) {
2603: &start_th_tex($parstack,$parser,$safeeval);
2604: last;
2605: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2606: splice @ar, $i+1;
2607: &end_th_tex(\@ar,$parser,$safeeval);
2608: &start_th_tex($parstack,$parser,$safeeval);
2609: last;
2610: }
2611: }
2612: return '';
2613: }
2614:
2615: sub start_th_tex {
2616: my ($parstack,$parser,$safeeval) = @_;
2617: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2618: if ($alignchar eq '') {
2619: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2620: }
2621: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2622: $Apache::londefdef::table[-1]{'counter_columns'}++;
2623: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2624: if (defined $TeXwidth) {
2625: my $current_length=&recalc($TeXwidth);
2626: $current_length=~/(\d+\.?\d*)/;
2627: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2628: }
2629: &Apache::lonxml::startredirection();
2630: return '';
2631: }
2632:
2633: sub end_th_tex {
2634: my ($parstack,$parser,$safeeval) = @_;
2635: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2636: my $data=&Apache::lonxml::endredirection();
2637: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2638: if (defined $TeXwidth) {
2639: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2640: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2641: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2642: } else {
2643: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2644: my $garbage_data=$data;
2645: my $fwidth=0;
2646: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2647: my $current_length=&recalc($1);
2648: $current_length=~/(\d+\.?\d*)/;
2649: if ($fwidth<$1) {$fwidth=$1;}
2650: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2651: }
2652: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2653: my $current_length=$1;
2654: if ($fwidth<$current_length) {$fwidth=$current_length;}
2655: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2656: }
2657: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2658: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2659: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2660: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2661: } else {
2662: $data=~s/^\s+(\S.*)/$1/;
2663: $data=~s/(.*\S)\s+$/$1/;
2664: $data=~s/(\s)+/$1/;
2665: my ($current_length,$min_length)=(0,0);
2666: if ($data=~/\\vskip/) {
2667: my $newdata=$data;
2668: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2669: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2670: foreach my $elementdata (@newdata) {
2671: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2672: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2673: my @words=split(/ /,$elementdata);
2674: foreach my $word (@words) {
2675: my $lengthword=2.5*&LATEX_length($word);
2676: if ($min_length<$lengthword) {$min_length=$lengthword;}
2677: }
2678: }
2679: } else {
2680: $current_length=2.5*&LATEX_length($data);
2681: my @words=split(/ /,$data);
2682: foreach my $word (@words) {
2683: my $lengthword=2*&LATEX_length($word);
2684: if ($min_length<$lengthword) {$min_length=$lengthword;}
2685: }
2686: }
2687: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2688: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2689: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2690: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2691: }
2692: }
2693: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2694: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2695: }
2696: #make data bold
2697: $data='\textbf{'.$data.'}';
2698: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2699: return'';
2700: }
2701:
2702: sub end_th {
2703: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2704: my $currentstring = &end_p(); # Close any open <p> in the row.
2705: if ($target eq 'web' || $target eq 'webgrade') {
2706: $currentstring .= $token->[2];
2707: } elsif ($target eq 'tex') {
2708: $Apache::londefdef::TD_redirection =0;
2709: &end_th_tex($parstack,$parser,$safeeval);
2710: }
2711: return $currentstring;
2712: }
2713:
2714: #-- <img> tag (end tag forbidden)
2715: #
2716: # Render the <IMG> tag.
2717: # <IMG> has the following attributes (in addition to the
2718: # standard HTML ones:
2719: # TeXwrap - Governs how the tex target will try to wrap text around
2720: # horizontally aligned images.
2721: # TeXwidth - The width of the image when rendered for print (mm).
2722: # TeXheight - The height of the image when rendered for print (mm)
2723: # (Note there seems to also be support for this as a % of page size)
2724: #
2725: sub start_img {
2726: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2727: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2728: undef,1);
2729: if (! $src &&
2730: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2731: ) {
2732: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2733: return '';
2734: }
2735: &Apache::lonxml::extlink($src);
2736: my $currentstring = '';
2737: my $scaling = .3;
2738:
2739: # Render unto browsers that which are the browser's...
2740:
2741: if ($target eq 'web' || $target eq 'webgrade') {
2742: if ($env{'browser.imagesuppress'} ne 'on') {
2743: my $enc = ('yes' eq
2744: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2745: $safeeval)));
2746: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2747: $enc);
2748: } else {
2749: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2750: undef,1);
2751: if (!$alttag) {
2752: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2753: $src);
2754: }
2755: $currentstring.='[IMAGE: '.$alttag.']';
2756: }
2757:
2758: # and render unto TeX that which is LaTeX
2759:
2760: } elsif ($target eq 'tex') {
2761: #
2762: # The alignment will require some superstructure to be put around
2763: # the \includegraphics stuff. At present we can only partially
2764: # simulate the alignments offered by html.
2765: #
2766: #
2767: my $align = lc(&Apache::lonxml::get_param('align',
2768: $parstack,
2769: $safeeval,
2770: undef,1));
2771: if(!$align) {
2772: $align = "bottom"; # This is html's default so it's ours too.
2773: }
2774: #
2775: &Apache::lonxml::debug("Alignemnt = $align");
2776: # LaTeX's image/text wrapping is really bad since it wants to
2777: # make figures float.
2778: # The user has the optional parameter (applicable only to l/r
2779: # alignment to use the picins/parpic directive to get wrapped text
2780: # this is also imperfect.. that's why we give them a choice...
2781: # so they can't yell at us for our choice.
2782: #
2783: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2784: $parstack,
2785: $safeeval,
2786: undef,0);
2787: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2788: if(!$latex_rendering) {
2789: $latex_rendering = "texwrap";
2790: }
2791: # using texwrap inside a table does not work. So, if after all of this,
2792: # texwrap is on, we turn it off if we detect we're in a table:
2793: #
2794: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2795: $latex_rendering = 'parpic';
2796: }
2797:
2798: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2799:
2800: #if original gif/jpg/png file exist do following:
2801: my $origsrc=$src;
2802: my ($path,$file) = &get_eps_image($src);
2803: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2804: &Apache::lonxml::debug("path = $path file = $file src = $src");
2805: if (-e $src) {
2806: &Apache::lonxml::debug("$src exists");
2807: my ($height_param,$width_param)=
2808: &image_size($origsrc,0.3,$parstack,$safeeval);
2809: my $destpath = $path;
2810: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2811: my $destfile = $file;
2812: $destfile =~ s/ /\_/g;
2813: my $size;
2814: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2815: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2816: $size='['.$size;
2817: $size=~s/,$/]/;
2818: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2819: .'\includegraphics'.$size.'{'.$destfile.'} ';
2820:
2821: # If there's an alignment specification we need to honor it here.
2822: # For the horizontal alignments, we will also honor the
2823: # value of the latex specfication. The default is parbox,
2824: # and that's used for illegal values too.
2825: #
2826: # Even though we set a default alignment value, the user
2827: # could have given us an illegal value. In that case we
2828: # just use the default alignment of bottom..
2829: if ($align eq "top") {
2830: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2831: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2832: my $offset = $height_param/2;
2833: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2834: } elsif ($align eq "left") {
2835: if ($latex_rendering eq "parpic") {
2836: $currentstring = '\parpic[l]{'.$currentstring.'}';
2837: } else { # wrapfig render
2838: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2839: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2840: }
2841: } elsif ($align eq "right") {
2842: if ($latex_rendering eq "parpic") {
2843: $currentstring = '\parpic[r]{'.$currentstring.'}';
2844: } else { # wrapfig rendering
2845: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2846: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2847:
2848: }
2849: } else { # Bottom is also default.
2850: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2851: }
2852: } else {
2853: &Apache::lonxml::debug("$src does not exist");
2854: #original image file doesn't exist so check the alt attribute
2855: my $alt =
2856: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2857: unless ($alt) {
2858: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2859: }
2860:
2861: if ($alt) { $currentstring .= ' '.$alt.' '; }
2862: }
2863:
2864: # And here's where the semi-quote breaks down: allow the user
2865: # to edit the beast as well by rendering the problem for edit:
2866: } elsif ($target eq 'edit') {
2867: $currentstring .=&Apache::edit::tag_start($target,$token);
2868: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2869: &Apache::edit::browse('src',undef,'alt').' '.
2870: &Apache::edit::search('src',undef,'alt').'<br />';
2871: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2872: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2873: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2874: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2875: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2876: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2877: ['','bottom','middle','top','left','right'],$token,5);
2878: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2879: ['', 'parbox', 'parpic'], $token, 2);
2880: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2881: ['no','yes'], $token, 2);
2882: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2883: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2884: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2885: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2886: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2887:
2888:
2889: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2890: if ($width) { $currentstring.=' width="'.$width.'" '; }
2891: if ($height) { $currentstring.=' height="'.$height.'" '; }
2892: $currentstring .= ' />';
2893: } elsif ($target eq 'modified') {
2894: my ($osrc,$owidth,$oheight)=
2895: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2896: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2897: $safeeval,'src','alt','align',
2898: 'TeXwidth','TeXheight', 'TeXwrap',
2899: 'width','height','encrypturl');
2900: my ($nsrc,$nwidth,$nheight)=
2901: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2902: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2903: &image_replication($loc);
2904: my ($iwidth,$iheight);
2905: if (-e $loc) {
2906: my $image = Image::Magick->new;
2907: $image->Read($loc);
2908: ($iwidth, $iheight) = ($image->Get('width'),
2909: $image->Get('height'));
2910: }
2911: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2912: # changed image or no size specified,
2913: # if they didn't explicitly change the
2914: # width or height use the ones from the image
2915: if ($iwidth && $iheight) {
2916: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2917: $token->[2]{'width'} = $iwidth;$ctag=1;
2918: }
2919: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2920: $token->[2]{'height'}=$iheight;$ctag=1;
2921: }
2922: }
2923: }
2924: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2925: # if we don't have a width or height
2926: if ($iwidth && $cwidth && !$cheight) {
2927: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2928: }
2929: if ($iheight && $cheight && !$cwidth) {
2930: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2931: }
2932: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2933: }
2934:
2935: return $currentstring;
2936: }
2937:
2938: sub end_img {
2939: my ($target,$token) = @_;
2940: my $currentstring = '';
2941: if ($target eq 'web' || $target eq 'webgrade') {
2942: $currentstring = $token->[2];
2943: } elsif ($target eq 'tex') {
2944: $currentstring = '';
2945: }
2946: return $currentstring;
2947: }
2948:
2949: #-- <applet> tag (end tag required)
2950: sub start_applet {
2951: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2952:
2953: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2954: &Apache::lonxml::extlink($code);
2955: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2956: undef,1);
2957: &Apache::lonxml::extlink($archive);
2958: my $currentstring = '';
2959: if ($target eq 'web' || $target eq 'webgrade') {
2960: if ($env{'browser.appletsuppress'} ne 'on') {
2961: $currentstring = &Apache::lonenc::encrypt_ref($token,
2962: {'code'=>$code,
2963: 'archive'=>$archive}
2964: );
2965: } else {
2966: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2967: $safeeval,undef,1);
2968: unless ($alttag) {
2969: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2970: $code);
2971: }
2972: $currentstring='[APPLET: '.$alttag.']';
2973: }
2974: } elsif ($target eq 'tex') {
2975: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2976: $safeeval,undef,1);
2977: unless ($alttag) {
2978: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2979: undef,1);
2980: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2981: $code);
2982: }
2983: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2984: '.}\end{center}';
2985: }
2986: return $currentstring;
2987: }
2988:
2989: sub end_applet {
2990: my ($target,$token) = @_;
2991: my $currentstring = '';
2992: if ($target eq 'web' || $target eq 'webgrade') {
2993: $currentstring = $token->[2];
2994: } elsif ($target eq 'tex') {
2995: }
2996: return $currentstring;
2997: }
2998:
2999: #-- <embed> tag (end tag optional/required)
3000: sub start_embed {
3001: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3002: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3003: &Apache::lonxml::extlink($src);
3004: my $currentstring = '';
3005: if ($target eq 'web' || $target eq 'webgrade') {
3006: if ($env{'browser.embedsuppress'} ne 'on') {
3007: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3008: } else {
3009: my $alttag=&Apache::lonxml::get_param
3010: ('alt',$parstack,$safeeval,undef,1);
3011: unless ($alttag) {
3012: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3013: }
3014: $currentstring='[EMBED: '.$alttag.']';
3015: }
3016: } elsif ($target eq 'tex') {
3017: }
3018: return $currentstring;
3019: }
3020:
3021: sub end_embed {
3022: my ($target,$token) = @_;
3023: my $currentstring = '';
3024: if ($target eq 'web' || $target eq 'webgrade') {
3025: $currentstring = $token->[2];
3026: } elsif ($target eq 'tex') {
3027: }
3028: return $currentstring;
3029: }
3030:
3031: #-- <param> tag (end tag forbidden)
3032: sub start_param {
3033: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3034: if (&Apache::lonxml::get_param('name',$parstack,
3035: $safeeval,undef,1)=~/^cabbase$/i) {
3036: my $value=&Apache::lonxml::get_param('value',$parstack,
3037: $safeeval,undef,1);
3038: &Apache::lonxml::extlink($value);
3039: }
3040:
3041: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3042: &Apache::lonxml::extlink($src);
3043: my $currentstring = '';
3044: if ($target eq 'web' || $target eq 'webgrade') {
3045: my %toconvert;
3046: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3047: if ($src) { $toconvert{'src'}= $src; }
3048: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3049: undef,1);
3050: if ($name=~/^cabbase$/i) {
3051: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3052: $safeeval,undef,1);
3053: }
3054: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3055: } elsif ($target eq 'tex') {
3056: }
3057: return $currentstring;
3058: }
3059:
3060: sub end_param {
3061: my ($target,$token) = @_;
3062: my $currentstring = '';
3063: if ($target eq 'web' || $target eq 'webgrade') {
3064: $currentstring = $token->[2];
3065: } elsif ($target eq 'tex') {
3066: }
3067: return $currentstring;
3068: }
3069:
3070: #-- <allow> tag
3071: sub start_allow {
3072: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3073: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3074: &Apache::lonxml::extlink($src);
3075:
3076: if ($target eq 'tex') { &image_replication($src); }
3077: my $result;
3078: if ($target eq 'edit') {
3079: $result .=&Apache::edit::tag_start($target,$token);
3080: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3081: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3082: } elsif ($target eq 'modified') {
3083: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3084: $safeeval,'src');
3085: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3086: }
3087: return $result;
3088: }
3089:
3090: sub end_allow {
3091: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3092: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3093: return '';
3094: }
3095:
3096: #-- Frames (end tag required)
3097: #-- <frameset>
3098: sub start_frameset {
3099: my ($target,$token) = @_;
3100: my $currentstring = ''; # Close any pending para.
3101: if ($target eq 'web' || $target eq 'webgrade') {
3102: $currentstring =
3103: &Apache::loncommon::start_page($Apache::londefdef::title,
3104: $Apache::londefdef::head,
3105: {'add_entries' => $token->[2],
3106: 'no_title' => 1,
3107: 'force_register' => 1,
3108: 'frameset' => 1,});
3109:
3110: }
3111: return $currentstring;
3112: }
3113:
3114: sub end_frameset {
3115: my ($target,$token) = @_;
3116: my $currentstring = '';
3117: if ($target eq 'web' || $target eq 'webgrade') {
3118: $currentstring = $token->[2];
3119: }
3120: return $currentstring;
3121: }
3122:
3123: #-- <xmp> (end tag required)
3124: sub start_xmp {
3125: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3126: my $currentstring = '';
3127: if ($target eq 'web' || $target eq 'webgrade') {
3128: $currentstring .= $token->[4];
3129: } elsif ($target eq 'tex') {
3130: $currentstring .= '\begin{verbatim}';
3131: }
3132: return $currentstring;
3133: }
3134:
3135: sub end_xmp {
3136: my ($target,$token) = @_;
3137: my $currentstring = '';
3138: if ($target eq 'web' || $target eq 'webgrade') {
3139: $currentstring .= $token->[2];
3140: } elsif ($target eq 'tex') {
3141: $currentstring .= '\end{verbatim}';
3142: }
3143: return $currentstring;
3144: }
3145:
3146: #-- <pre> (end tag required)
3147: sub start_pre {
3148: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3149: my $currentstring = &end_p(); # close off pending <p>
3150: if ($target eq 'web' || $target eq 'webgrade') {
3151: $currentstring .= $token->[4];
3152: } elsif ($target eq 'tex') {
3153: $currentstring .= '\begin{verbatim}';
3154: &Apache::lonxml::disable_LaTeX_substitutions();
3155: }
3156: return $currentstring;
3157: }
3158:
3159: sub end_pre {
3160: my ($target,$token) = @_;
3161: my $currentstring = '';
3162: if ($target eq 'web' || $target eq 'webgrade') {
3163: $currentstring .= $token->[2];
3164: } elsif ($target eq 'tex') {
3165: $currentstring .= '\end{verbatim}';
3166: &Apache::lonxml::enable_LaTeX_substitutions();
3167: }
3168: return $currentstring;
3169: }
3170:
3171: #-- <insert>
3172: sub start_insert {
3173: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3174: my $currentstring = '';
3175: if ($target eq 'web' || $target eq 'webgrade') {
3176: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3177: $currentstring .= '<b>'.$display.'</b>';;
3178: }
3179: return $currentstring;
3180: }
3181:
3182: sub end_insert {
3183: my ($target,$token) = @_;
3184: my $currentstring = '';
3185: if ($target eq 'web' || $target eq 'webgrade') {
3186: $currentstring .= '';
3187: }
3188: return $currentstring;
3189: }
3190:
3191: #-- <externallink>
3192: sub start_externallink {
3193: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3194: my $currentstring = '';
3195: if ($target eq 'web' || $target eq 'webgrade') {
3196: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3197: $currentstring .= '<b>'.$display.'</b>';;
3198: }
3199: return $currentstring;
3200: }
3201:
3202: sub end_externallink {
3203: my ($target,$token) = @_;
3204: my $currentstring = '';
3205: if ($target eq 'web' || $target eq 'webgrade') {
3206: $currentstring .= '';
3207: }
3208: return $currentstring;
3209: }
3210:
3211: #-- <blankspace heigth="">
3212: sub start_blankspace {
3213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3214: my $currentstring = &end_p(); # closes off any unclosed <p>
3215: if ($target eq 'tex') {
3216: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3217: $currentstring .= '\vskip '.$howmuch.' ';
3218: }
3219: return $currentstring;
3220: }
3221:
3222: sub end_blankspace {
3223: my ($target,$token) = @_;
3224: my $currentstring = '';
3225: if ($target eq 'tex') {
3226: $currentstring .= '';
3227: }
3228: return $currentstring;
3229: }
3230:
3231: #-- <abbr> tag (end tag required)
3232: sub start_abbr {
3233: my ($target,$token) = @_;
3234: my $currentstring = '';
3235: if ($target eq 'web' || $target eq 'webgrade') {
3236: $currentstring = $token->[4];
3237: }
3238: return $currentstring;
3239: }
3240:
3241: sub end_abbr {
3242: my ($target,$token) = @_;
3243: my $currentstring = '';
3244: if ($target eq 'web' || $target eq 'webgrade') {
3245: $currentstring = $token->[2];
3246: }
3247: return $currentstring;
3248: }
3249:
3250: #-- <acronym> tag (end tag required)
3251: sub start_acronym {
3252: my ($target,$token) = @_;
3253: my $currentstring = '';
3254: if ($target eq 'web' || $target eq 'webgrade') {
3255: $currentstring = $token->[4];
3256: }
3257: return $currentstring;
3258: }
3259:
3260: sub end_acronym {
3261: my ($target,$token) = @_;
3262: my $currentstring = '';
3263: if ($target eq 'web' || $target eq 'webgrade') {
3264: $currentstring = $token->[2];
3265: }
3266: return $currentstring;
3267: }
3268:
3269: #-- <area> tag (end tag forbidden)
3270: sub start_area {
3271: my ($target,$token) = @_;
3272: my $currentstring = '';
3273: if ($target eq 'web' || $target eq 'webgrade') {
3274: $currentstring = $token->[4];
3275: }
3276: return $currentstring;
3277: }
3278:
3279: sub end_area {
3280: my ($target,$token) = @_;
3281: my $currentstring = '';
3282: if ($target eq 'web' || $target eq 'webgrade') {
3283: $currentstring = $token->[2];
3284: }
3285: return $currentstring;
3286: }
3287:
3288: #-- <base> tag (end tag forbidden)
3289: sub start_base {
3290: my ($target,$token) = @_;
3291: my $currentstring = '';
3292: if ($target eq 'web' || $target eq 'webgrade') {
3293: $currentstring = $token->[4];
3294: }
3295: return $currentstring;
3296: }
3297:
3298: sub end_base {
3299: my ($target,$token) = @_;
3300: my $currentstring = '';
3301: if ($target eq 'web' || $target eq 'webgrade') {
3302: $currentstring = $token->[2];
3303: }
3304: return $currentstring;
3305: }
3306:
3307: #-- <bdo> tag (end tag required)
3308: sub start_bdo {
3309: my ($target,$token) = @_;
3310: my $currentstring = '';
3311: if ($target eq 'web' || $target eq 'webgrade') {
3312: $currentstring = $token->[4];
3313: }
3314: return $currentstring;
3315: }
3316:
3317: sub end_bdo {
3318: my ($target,$token) = @_;
3319: my $currentstring = '';
3320: if ($target eq 'web' || $target eq 'webgrade') {
3321: $currentstring = $token->[2];
3322: }
3323: return $currentstring;
3324: }
3325:
3326: #-- <bgsound> tag (end tag optional)
3327: sub start_bgsound {
3328: my ($target,$token) = @_;
3329: my $currentstring = '';
3330: if ($target eq 'web' || $target eq 'webgrade') {
3331: $currentstring = $token->[4];
3332: }
3333: return $currentstring;
3334: }
3335:
3336: sub end_bgsound {
3337: my ($target,$token) = @_;
3338: my $currentstring = '';
3339: if ($target eq 'web' || $target eq 'webgrade') {
3340: $currentstring = $token->[2];
3341: }
3342: return $currentstring;
3343: }
3344:
3345: #-- <blink> tag (end tag required)
3346: sub start_blink {
3347: my ($target,$token) = @_;
3348: my $currentstring = '';
3349: if ($target eq 'web' || $target eq 'webgrade') {
3350: $currentstring = $token->[4];
3351: }
3352: return $currentstring;
3353: }
3354:
3355: sub end_blink {
3356: my ($target,$token) = @_;
3357: my $currentstring = '';
3358: if ($target eq 'web' || $target eq 'webgrade') {
3359: $currentstring = $token->[2];
3360: }
3361: return $currentstring;
3362: }
3363:
3364: #-- <blockquote> tag (end tag required)
3365: sub start_blockquote {
3366: my ($target,$token) = @_;
3367: my $currentstring = &end_p(); # Close any unclosed <p>
3368: if ($target eq 'web' || $target eq 'webgrade') {
3369: $currentstring .= $token->[4];
3370: }
3371: return $currentstring;
3372: }
3373:
3374: sub end_blockquote {
3375: my ($target,$token) = @_;
3376: my $currentstring = '';
3377: if ($target eq 'web' || $target eq 'webgrade') {
3378: $currentstring = $token->[2];
3379: }
3380: return $currentstring;
3381: }
3382:
3383: #-- <button> tag (end tag required)
3384: sub start_button {
3385: my ($target,$token) = @_;
3386: my $currentstring = '';
3387: if ($target eq 'web' || $target eq 'webgrade') {
3388: $currentstring = $token->[4];
3389: }
3390: return $currentstring;
3391: }
3392:
3393: sub end_button {
3394: my ($target,$token) = @_;
3395: my $currentstring = '';
3396: if ($target eq 'web' || $target eq 'webgrade') {
3397: $currentstring = $token->[2];
3398: }
3399: return $currentstring;
3400: }
3401:
3402: #-- <caption> tag (end tag required)
3403: sub start_caption {
3404: my ($target,$token) = @_;
3405: my $currentstring = '';
3406: if ($target eq 'web' || $target eq 'webgrade') {
3407: $currentstring = $token->[4];
3408: }
3409: return $currentstring;
3410: }
3411:
3412: sub end_caption {
3413: my ($target,$token) = @_;
3414: my $currentstring = '';
3415: if ($target eq 'web' || $target eq 'webgrade') {
3416: $currentstring = $token->[2];
3417: }
3418: return $currentstring;
3419: }
3420:
3421: #-- <col> tag (end tag forbdden)
3422: sub start_col {
3423: my ($target,$token) = @_;
3424: my $currentstring = '';
3425: if ($target eq 'web' || $target eq 'webgrade') {
3426: $currentstring = $token->[4];
3427: }
3428: return $currentstring;
3429: }
3430:
3431: sub end_col {
3432: my ($target,$token) = @_;
3433: my $currentstring = '';
3434: if ($target eq 'web' || $target eq 'webgrade') {
3435: $currentstring = $token->[2];
3436: }
3437: return $currentstring;
3438: }
3439:
3440: #-- <colgroup> tag (end tag optional)
3441: sub start_colgroup {
3442: my ($target,$token) = @_;
3443: my $currentstring = '';
3444: if ($target eq 'web' || $target eq 'webgrade') {
3445: $currentstring = $token->[4];
3446: }
3447: return $currentstring;
3448: }
3449:
3450: sub end_colgroup {
3451: my ($target,$token) = @_;
3452: my $currentstring = '';
3453: if ($target eq 'web' || $target eq 'webgrade') {
3454: $currentstring = $token->[2];
3455: }
3456: return $currentstring;
3457: }
3458:
3459: #-- <del> tag (end tag required)
3460: sub start_del {
3461: my ($target,$token) = @_;
3462: my $currentstring = '';
3463: if ($target eq 'web' || $target eq 'webgrade') {
3464: $currentstring = $token->[4];
3465: }
3466: return $currentstring;
3467: }
3468:
3469: sub end_del {
3470: my ($target,$token) = @_;
3471: my $currentstring = '';
3472: if ($target eq 'web' || $target eq 'webgrade') {
3473: $currentstring = $token->[2];
3474: }
3475: return $currentstring;
3476: }
3477:
3478: #-- <fieldset> tag (end tag required)
3479: sub start_fieldset {
3480: my ($target,$token) = @_;
3481: my $currentstring = '';
3482: if ($target eq 'web' || $target eq 'webgrade') {
3483: $currentstring = $token->[4];
3484: }
3485: return $currentstring;
3486: }
3487:
3488: sub end_fieldset {
3489: my ($target,$token) = @_;
3490: my $currentstring = '';
3491: if ($target eq 'web' || $target eq 'webgrade') {
3492: $currentstring = $token->[2];
3493: }
3494: return $currentstring;
3495: }
3496:
3497: #-- <frame> tag (end tag forbidden)
3498: sub start_frame {
3499: my ($target,$token) = @_;
3500: my $currentstring = '';
3501: if ($target eq 'web' || $target eq 'webgrade') {
3502: $currentstring = $token->[4];
3503: }
3504: return $currentstring;
3505: }
3506:
3507: sub end_frame {
3508: my ($target,$token) = @_;
3509: my $currentstring = '';
3510: if ($target eq 'web' || $target eq 'webgrade') {
3511: $currentstring = $token->[2];
3512: }
3513: return $currentstring;
3514: }
3515:
3516: #-- <iframe> tag (end tag required)
3517: sub start_iframe {
3518: my ($target,$token) = @_;
3519: my $currentstring = '';
3520: if ($target eq 'web' || $target eq 'webgrade') {
3521: $currentstring = $token->[4];
3522: }
3523: return $currentstring;
3524: }
3525:
3526: sub end_iframe {
3527: my ($target,$token) = @_;
3528: my $currentstring = '';
3529: if ($target eq 'web' || $target eq 'webgrade') {
3530: $currentstring = $token->[2];
3531: }
3532: return $currentstring;
3533: }
3534:
3535: #-- <ins> tag (end tag required)
3536: sub start_ins {
3537: my ($target,$token) = @_;
3538: my $currentstring = '';
3539: if ($target eq 'web' || $target eq 'webgrade') {
3540: $currentstring = $token->[4];
3541: }
3542: return $currentstring;
3543: }
3544:
3545: sub end_ins {
3546: my ($target,$token) = @_;
3547: my $currentstring = '';
3548: if ($target eq 'web' || $target eq 'webgrade') {
3549: $currentstring = $token->[2];
3550: }
3551: return $currentstring;
3552: }
3553:
3554: #-- <isindex> tag (end tag forbidden)
3555: sub start_isindex {
3556: my ($target,$token) = @_;
3557: my $currentstring = '';
3558: if ($target eq 'web' || $target eq 'webgrade') {
3559: $currentstring = $token->[4];
3560: }
3561: return $currentstring;
3562: }
3563:
3564: sub end_isindex {
3565: my ($target,$token) = @_;
3566: my $currentstring = '';
3567: if ($target eq 'web' || $target eq 'webgrade') {
3568: $currentstring = $token->[2];
3569: }
3570: return $currentstring;
3571: }
3572:
3573: #-- <keygen> tag (end tag forbidden)
3574: sub start_keygen {
3575: my ($target,$token) = @_;
3576: my $currentstring = '';
3577: if ($target eq 'web' || $target eq 'webgrade') {
3578: $currentstring = $token->[4];
3579: }
3580: return $currentstring;
3581: }
3582:
3583: sub end_keygen {
3584: my ($target,$token) = @_;
3585: my $currentstring = '';
3586: if ($target eq 'web' || $target eq 'webgrade') {
3587: $currentstring = $token->[2];
3588: }
3589: return $currentstring;
3590: }
3591:
3592: #-- <label> tag
3593: sub start_label {
3594: my ($target,$token) = @_;
3595: my $currentstring = '';
3596: if ($target eq 'web' || $target eq 'webgrade') {
3597: $currentstring = $token->[4];
3598: }
3599: return $currentstring;
3600: }
3601:
3602: sub end_label {
3603: my ($target,$token) = @_;
3604: my $currentstring = '';
3605: if ($target eq 'web' || $target eq 'webgrade') {
3606: $currentstring = $token->[2];
3607: }
3608: return $currentstring;
3609: }
3610:
3611: #-- <layer> tag (end tag required)
3612: sub start_layer {
3613: my ($target,$token) = @_;
3614: my $currentstring = '';
3615: if ($target eq 'web' || $target eq 'webgrade') {
3616: $currentstring = $token->[4];
3617: }
3618: return $currentstring;
3619: }
3620:
3621: sub end_layer {
3622: my ($target,$token) = @_;
3623: my $currentstring = '';
3624: if ($target eq 'web' || $target eq 'webgrade') {
3625: $currentstring = $token->[2];
3626: }
3627: return $currentstring;
3628: }
3629:
3630: #-- <legend> tag (end tag required)
3631: sub start_legend {
3632: my ($target,$token) = @_;
3633: my $currentstring = '';
3634: if ($target eq 'web' || $target eq 'webgrade') {
3635: $currentstring = $token->[4];
3636: }
3637: return $currentstring;
3638: }
3639:
3640: sub end_legend {
3641: my ($target,$token) = @_;
3642: my $currentstring = '';
3643: if ($target eq 'web' || $target eq 'webgrade') {
3644: $currentstring = $token->[2];
3645: }
3646: return $currentstring;
3647: }
3648:
3649: #-- <link> tag (end tag forbidden)
3650: sub start_link {
3651: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3652: my $currentstring = '';
3653: if ($target eq 'web' || $target eq 'webgrade') {
3654: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3655: undef,1);
3656: &Apache::lonxml::extlink($href);
3657: $currentstring = $token->[4];
3658: }
3659: return $currentstring;
3660: }
3661:
3662: sub end_link {
3663: my ($target,$token) = @_;
3664: my $currentstring = '';
3665: if ($target eq 'web' || $target eq 'webgrade') {
3666: $currentstring = $token->[2];
3667: }
3668: return $currentstring;
3669: }
3670:
3671: #-- <marquee> tag (end tag optional)
3672: sub start_marquee {
3673: my ($target,$token) = @_;
3674: my $currentstring = '';
3675: if ($target eq 'web' || $target eq 'webgrade') {
3676: $currentstring = $token->[4];
3677: }
3678: return $currentstring;
3679: }
3680:
3681: sub end_marquee {
3682: my ($target,$token) = @_;
3683: my $currentstring = '';
3684: if ($target eq 'web' || $target eq 'webgrade') {
3685: $currentstring = $token->[2];
3686: }
3687: return $currentstring;
3688: }
3689:
3690: #-- <multicol> tag (end tag required)
3691: sub start_multicol {
3692: my ($target,$token) = @_;
3693: my $currentstring = &end_p(); # Close any pending <p>
3694: if ($target eq 'web' || $target eq 'webgrade') {
3695: $currentstring .= $token->[4];
3696: }
3697: return $currentstring;
3698: }
3699:
3700: sub end_multicol {
3701: my ($target,$token) = @_;
3702: my $currentstring = '';
3703: if ($target eq 'web' || $target eq 'webgrade') {
3704: $currentstring = $token->[2];
3705: }
3706: return $currentstring;
3707: }
3708:
3709: #-- <nobr> tag (end tag required)
3710: sub start_nobr {
3711: my ($target,$token) = @_;
3712: my $currentstring = '';
3713: if ($target eq 'web' || $target eq 'webgrade') {
3714: $currentstring = $token->[4];
3715: } elsif ($target eq 'tex') {
3716: $currentstring='\mbox{';
3717: }
3718: return $currentstring;
3719: }
3720:
3721: sub end_nobr {
3722: my ($target,$token) = @_;
3723: my $currentstring = '';
3724: if ($target eq 'web' || $target eq 'webgrade') {
3725: $currentstring = $token->[2];
3726: } elsif ($target eq 'tex') {
3727: $currentstring='}';
3728: }
3729: return $currentstring;
3730: }
3731:
3732: #-- <noembed> tag (end tag required)
3733: sub start_noembed {
3734: my ($target,$token) = @_;
3735: my $currentstring = '';
3736: if ($target eq 'web' || $target eq 'webgrade') {
3737: $currentstring = $token->[4];
3738: }
3739: return $currentstring;
3740: }
3741:
3742: sub end_noembed {
3743: my ($target,$token) = @_;
3744: my $currentstring = '';
3745: if ($target eq 'web' || $target eq 'webgrade') {
3746: $currentstring = $token->[2];
3747: }
3748: return $currentstring;
3749: }
3750:
3751: #-- <noframes> tag (end tag required)
3752: sub start_noframes {
3753: my ($target,$token) = @_;
3754: my $currentstring = '';
3755: if ($target eq 'web' || $target eq 'webgrade') {
3756: $currentstring = $token->[4];
3757: }
3758: return $currentstring;
3759: }
3760:
3761: sub end_noframes {
3762: my ($target,$token) = @_;
3763: my $currentstring = '';
3764: if ($target eq 'web' || $target eq 'webgrade') {
3765: $currentstring = $token->[2];
3766: }
3767: return $currentstring;
3768: }
3769:
3770: #-- <nolayer> tag (end tag required)
3771: sub start_nolayer {
3772: my ($target,$token) = @_;
3773: my $currentstring = '';
3774: if ($target eq 'web' || $target eq 'webgrade') {
3775: $currentstring = $token->[4];
3776: }
3777: return $currentstring;
3778: }
3779:
3780: sub end_nolayer {
3781: my ($target,$token) = @_;
3782: my $currentstring = '';
3783: if ($target eq 'web' || $target eq 'webgrade') {
3784: $currentstring = $token->[2];
3785: }
3786: return $currentstring;
3787: }
3788:
3789: #-- <noscript> tag (end tag required)
3790: sub start_noscript {
3791: my ($target,$token) = @_;
3792: my $currentstring = '';
3793: if ($target eq 'web' || $target eq 'webgrade') {
3794: $currentstring = $token->[4];
3795: }
3796: return $currentstring;
3797: }
3798:
3799: sub end_noscript {
3800: my ($target,$token) = @_;
3801: my $currentstring = '';
3802: if ($target eq 'web' || $target eq 'webgrade') {
3803: $currentstring = $token->[2];
3804: }
3805: return $currentstring;
3806: }
3807:
3808: #-- <object> tag (end tag required)
3809: sub start_object {
3810: my ($target,$token) = @_;
3811: my $currentstring = '';
3812: if ($target eq 'web' || $target eq 'webgrade') {
3813: $currentstring = $token->[4];
3814: }
3815: return $currentstring;
3816: }
3817:
3818: sub end_object {
3819: my ($target,$token) = @_;
3820: my $currentstring = '';
3821: if ($target eq 'web' || $target eq 'webgrade') {
3822: $currentstring = $token->[2];
3823: }
3824: return $currentstring;
3825: }
3826:
3827: #-- <optgroup> tag (end tag required)
3828: sub start_optgroup {
3829: my ($target,$token) = @_;
3830: my $currentstring = '';
3831: if ($target eq 'web' || $target eq 'webgrade') {
3832: $currentstring = $token->[4];
3833: }
3834: return $currentstring;
3835: }
3836:
3837: sub end_optgroup {
3838: my ($target,$token) = @_;
3839: my $currentstring = '';
3840: if ($target eq 'web' || $target eq 'webgrade') {
3841: $currentstring = $token->[2];
3842: }
3843: return $currentstring;
3844: }
3845:
3846: #-- <samp> tag (end tag required)
3847: sub start_samp {
3848: my ($target,$token) = @_;
3849: my $currentstring = '';
3850: if ($target eq 'web' || $target eq 'webgrade') {
3851: $currentstring = $token->[4];
3852: } elsif ($target eq 'tex') {
3853: $currentstring='\texttt{';
3854: }
3855: return $currentstring;
3856: }
3857:
3858: sub end_samp {
3859: my ($target,$token) = @_;
3860: my $currentstring = '';
3861: if ($target eq 'web' || $target eq 'webgrade') {
3862: $currentstring = $token->[2];
3863: } elsif ($target eq 'tex') {
3864: $currentstring='}';
3865: }
3866: return $currentstring;
3867: }
3868:
3869: #-- <server> tag
3870: sub start_server {
3871: my ($target,$token) = @_;
3872: my $currentstring = '';
3873: if ($target eq 'web' || $target eq 'webgrade') {
3874: $currentstring = $token->[4];
3875: }
3876: return $currentstring;
3877: }
3878:
3879: sub end_server {
3880: my ($target,$token) = @_;
3881: my $currentstring = '';
3882: if ($target eq 'web' || $target eq 'webgrade') {
3883: $currentstring = $token->[2];
3884: }
3885: return $currentstring;
3886: }
3887:
3888: #-- <spacer> tag (end tag forbidden)
3889: sub start_spacer {
3890: my ($target,$token) = @_;
3891: my $currentstring = &end_p(); # Close off any open <p> tag.
3892: if ($target eq 'web' || $target eq 'webgrade') {
3893: $currentstring .= $token->[4];
3894: }
3895: return $currentstring;
3896: }
3897:
3898: sub end_spacer {
3899: my ($target,$token) = @_;
3900: my $currentstring = '';
3901: if ($target eq 'web' || $target eq 'webgrade') {
3902: $currentstring = $token->[2];
3903: }
3904: return $currentstring;
3905: }
3906:
3907: #-- <span> tag (end tag required)
3908: sub start_span {
3909: my ($target,$token) = @_;
3910: my $currentstring = '';
3911: if ($target eq 'web' || $target eq 'webgrade') {
3912: $currentstring = $token->[4];
3913: }
3914: return $currentstring;
3915: }
3916:
3917: sub end_span {
3918: my ($target,$token) = @_;
3919: my $currentstring = '';
3920: if ($target eq 'web' || $target eq 'webgrade') {
3921: $currentstring = $token->[2];
3922: }
3923: return $currentstring;
3924: }
3925:
3926: #-- <tbody> tag (end tag optional)
3927: sub start_tbody {
3928: my ($target,$token) = @_;
3929: my $currentstring = '';
3930: if ($target eq 'web' || $target eq 'webgrade') {
3931: $currentstring = $token->[4];
3932: }
3933: return $currentstring;
3934: }
3935:
3936: sub end_tbody {
3937: my ($target,$token) = @_;
3938: my $currentstring = '';
3939: if ($target eq 'web' || $target eq 'webgrade') {
3940: $currentstring = $token->[2];
3941: }
3942: return $currentstring;
3943: }
3944:
3945: #-- <tfoot> tag (end tag optional)
3946: sub start_tfoot {
3947: my ($target,$token) = @_;
3948: my $currentstring = '';
3949: if ($target eq 'web' || $target eq 'webgrade') {
3950: $currentstring = $token->[4];
3951: }
3952: return $currentstring;
3953: }
3954:
3955: sub end_tfoot {
3956: my ($target,$token) = @_;
3957: my $currentstring = '';
3958: if ($target eq 'web' || $target eq 'webgrade') {
3959: $currentstring = $token->[2];
3960: }
3961: return $currentstring;
3962: }
3963:
3964: #-- <thead> tag (end tag optional)
3965: sub start_thead {
3966: my ($target,$token) = @_;
3967: my $currentstring = '';
3968: if ($target eq 'web' || $target eq 'webgrade') {
3969: $currentstring = $token->[4];
3970: }
3971: return $currentstring;
3972: }
3973:
3974: sub end_thead {
3975: my ($target,$token) = @_;
3976: my $currentstring = '';
3977: if ($target eq 'web' || $target eq 'webgrade') {
3978: $currentstring = $token->[2];
3979: }
3980: return $currentstring;
3981: }
3982:
3983: #-- <var> tag
3984: sub start_var {
3985: my ($target,$token) = @_;
3986: my $currentstring = '';
3987: if ($target eq 'web' || $target eq 'webgrade') {
3988: $currentstring = $token->[4];
3989: } elsif ($target eq 'tex') {
3990: $currentstring = '\textit{';
3991: }
3992: return $currentstring;
3993: }
3994:
3995: sub end_var {
3996: my ($target,$token) = @_;
3997: my $currentstring = '';
3998: if ($target eq 'web' || $target eq 'webgrade') {
3999: $currentstring = $token->[2];
4000: } elsif ($target eq 'tex') {
4001: $currentstring = '}';
4002: }
4003: return $currentstring;
4004: }
4005:
4006: #-- <wbr> tag (end tag forbidden)
4007: sub start_wbr {
4008: my ($target,$token) = @_;
4009: my $currentstring = '';
4010: if ($target eq 'web' || $target eq 'webgrade') {
4011: $currentstring = $token->[4];
4012: }
4013: return $currentstring;
4014: }
4015:
4016: sub end_wbr {
4017: my ($target,$token) = @_;
4018: my $currentstring = '';
4019: if ($target eq 'web' || $target eq 'webgrade') {
4020: $currentstring = $token->[2];
4021: }
4022: return $currentstring;
4023: }
4024:
4025: #-- <hideweboutput> tag
4026: sub start_hideweboutput {
4027: my ($target,$token) = @_;
4028: if ($target eq 'web' || $target eq 'webgrade') {
4029: &Apache::lonxml::startredirection();
4030: }
4031: return '';
4032: }
4033:
4034: sub end_hideweboutput {
4035: my ($target,$token) = @_;
4036: my $currentstring = '';
4037: if ($target eq 'web' || $target eq 'webgrade') {
4038: $currentstring = &Apache::lonxml::endredirection();
4039: }
4040: return '';
4041: }
4042:
4043:
4044: sub image_replication {
4045: my $src = shift;
4046: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4047: #replicates eps or ps
4048: my $epssrc = my $pssrc = $src;
4049: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4050: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4051: if (not -e $epssrc && not -e $pssrc) {
4052: my $result=&Apache::lonnet::repcopy($epssrc);
4053: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4054: }
4055: return '';
4056: }
4057: #
4058: # Get correct sizing parameter for an image given
4059: # it's initial ht. and wid. This allows sizing of
4060: # images that are generated on-the-fly (e.g. gnuplot)
4061: # as well as serving as a utility for image_size.
4062: #
4063: # Parameter:
4064: # height_param
4065: # width_param - Initial picture dimensions.
4066: # scaling - A scale factor.
4067: # parstack, - the current stack of tag attributes
4068: # from the xml parser
4069: # safeeval, - pointer to the safespace
4070: # depth, - from what level in the stack to look for attributes
4071: # (assumes -1 if unspecified)
4072: # cis - look for attrubutes case insensitively
4073: # (assumes false)
4074: #
4075: # Returns:
4076: # height, width - new dimensions.
4077: #
4078: sub resize_image {
4079: my ($height_param, $width_param, $scaling,
4080: $parstack, $safeeval, $depth, $cis) = @_;
4081:
4082: # First apply the scaling...
4083:
4084: $height_param = $height_param * $scaling;
4085: $width_param = $width_param * $scaling;
4086:
4087: #do we have any specified LaTeX size of the picture?
4088: my $toget='TeXwidth';
4089: if ($cis) {
4090: $toget=lc($toget);
4091: }
4092: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4093: $safeeval,$depth,$cis);
4094: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4095: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4096: $safeeval,$depth,$cis);
4097: #do we have any specified web size of the picture?
4098: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4099: $depth,1);
4100: if ($TeXwidth) {
4101: my $old_width_param=$width_param;
4102: if ($TeXwidth=~/(\d+)\s*\%/) {
4103: $width_param = $1*$env{'form.textwidth'}/100;
4104: } else {
4105: $width_param = $TeXwidth;
4106: }
4107: if ($TeXheight) {
4108: $height_param = $TeXheight;
4109: } elsif ($old_width_param) {
4110: $height_param=$TeXwidth/$old_width_param*$height_param;
4111: }
4112: } elsif ($TeXheight) {
4113: $height_param = $TeXheight;
4114: if ($height_param) {
4115: $width_param = $TeXheight/$height_param*$width_param;
4116: }
4117: } elsif ($width) {
4118: my $old_width_param=$width_param;
4119: $width_param = $width*$scaling;
4120: if ($old_width_param) {
4121: $height_param=$width_param/$old_width_param*$height_param;
4122: }
4123: }
4124: if ($width_param > $env{'form.textwidth'}) {
4125: my $old_width_param=$width_param;
4126: $width_param =0.95*$env{'form.textwidth'};
4127: if ($old_width_param) {
4128: $height_param=$width_param/$old_width_param*$height_param;
4129: }
4130: }
4131:
4132: return ($height_param, $width_param);
4133: }
4134:
4135: sub image_size {
4136: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4137:
4138: #size of image from gif/jpg/jpeg/png
4139: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4140: if (-e $ressrc) {
4141: $src = $ressrc;
4142: }
4143: my $image = Image::Magick->new;
4144: my $current_figure = $image->Read($src);
4145: my $width_param = $image->Get('width');
4146: my $height_param = $image->Get('height');
4147: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4148: undef($image);
4149:
4150: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4151: $scaling, $parstack, $safeeval,
4152: $depth, $cis);
4153:
4154: return ($height_param, $width_param);
4155: }
4156:
4157: sub image_width {
4158: my ($height, $width) = &image_size(@_);
4159: return $width;
4160: }
4161: # Not yet 100% sure this is correct in all circumstances..
4162: # due to my uncertainty about mods to image_size.
4163: #
4164: sub image_height {
4165: my ($height, $width) = &image_size(@_);
4166: return $height;
4167: }
4168:
4169: sub get_eps_image {
4170: my ($src)=@_;
4171: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4172:
4173: # In order to prevent the substitution of the alt text, we need to
4174: # be sure the orig_src file is on system now so:
4175:
4176: if (! -e $orig_src) {
4177: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4178: }
4179: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4180: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4181: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4182: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4183: &Apache::lonxml::debug("Filelocation gives: $src");
4184: if (! -e $src) {
4185: &Apache::lonxml::debug("$src does not exist");
4186: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4187: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4188: #if replication failed try to find ps file
4189: $src=~s/\.eps$/\.ps/;
4190: &Apache::lonxml::debug("Now looking for $src");
4191: #if no ps file try to replicate it.
4192: my $didrepcopy = &Apache::lonnet::repcopy($src);
4193: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4194: if ( (not -e $src) ||
4195: ($didrepcopy ne 'ok')) {
4196: &Apache::lonxml::debug("Failed to find or replicate $src");
4197:
4198: #if replication failed try to produce eps file dynamically
4199: $src=~s/\.ps$/\.eps/;
4200: my $temp_file;
4201: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4202: my $newsrc=$orig_src;
4203: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4204: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4205: print FILE "$newsrc\n";
4206: close FILE;
4207: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4208: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4209: if ($sext ne "") { # Put the ext. back in to uniquify.
4210: $src =~ s/\.eps$/$sext.eps/;
4211: }
4212: }
4213: }
4214: }
4215: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4216: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4217: return ($path.'/',$file);
4218: }
4219:
4220: sub eps_generation {
4221: my ($src,$file,$width_param) = @_;
4222: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4223: my $temp_file = Apache::File->new('>>'.$filename);
4224: print $temp_file "$src\n";
4225: my $newsrc = $src;
4226: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4227: $newsrc=~s/\/home\/httpd\/html\/res//;
4228: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4229: $newsrc=~s/\/\.\//\//;
4230: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4231: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4232: $newsrc=~s/\/home\/httpd\/lonUsers//;
4233: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4234: }
4235: if ($newsrc=~/\/userfiles\//) {
4236: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4237: } else {
4238: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4239: }
4240: }
4241:
4242: sub file_path {
4243: my $src=shift;
4244: my ($file,$path);
4245: if ($src =~ m!(.*)/([^/]*)$!) {
4246: $file = $2;
4247: $path = $1.'/';
4248: }
4249: return $file,$path;
4250: }
4251: # Converts a measurement in to mm from any of
4252: # the other valid LaTeX units of measure.
4253: # If the units of measure are missing from the
4254: # parameter, it is assumed to be in and returned
4255: # with mm units of measure
4256: sub recalc {
4257: my $argument = shift;
4258: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4259: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4260: my $value=$1;
4261: my $units=$2;
4262: if ($units eq 'cm') {
4263: $value*=10;
4264: } elsif ($units eq 'in') {
4265: $value*=25.4;
4266: } elsif ($units eq 'pc') {
4267: $value*=(25.4*12/72.27);
4268: } elsif ($units eq 'pt') {
4269: $value*=(25.4/72.27);
4270: }
4271: return $value.' mm';
4272: }
4273:
4274: sub LATEX_length {
4275: my $garbage=shift;
4276: $garbage=~s/^\s+$//;
4277: $garbage=~s/^\s+(\S.*)/$1/;#space before
4278: $garbage=~s/(.*\S)\s+$/$1/;#space after
4279: $garbage=~s/(\s)+/$1/;#only one space
4280: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4281: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4282: $garbage=~s/([^\\])\$/$1/g;#$
4283: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4284: $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;
4285: $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;
4286: $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;
4287: $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;
4288: $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;
4289: $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;
4290: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4291: #remove some other LaTeX command
4292: $garbage=~s|\\(\w+)\\|\\|g;
4293: $garbage=~s|\\(\w+)(\s*)|$2|g;
4294: $garbage=~s|\+|11|g;
4295: my $value=length($garbage);
4296: return $value;
4297: }
4298:
4299:
4300: # is_inside_of $tagstack $tag
4301: # This sub returns true if the current state of Xml processing
4302: # is inside of the tag.
4303: # Parameters:
4304: # tagstack - The tagstack from the parser.
4305: # tag - The tag (without the <>'s.).
4306: # Sample usage:
4307: # if (is_inside_of($tagstack "table")) {
4308: # # I'm in a table....
4309: # }
4310: sub is_inside_of {
4311: my ($tagstack, $tag) = @_;
4312: my @stack = @$tagstack;
4313: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4314: if ($stack[$i] eq $tag) {
4315: return 1;
4316: }
4317: }
4318: return 0;
4319: }
4320:
4321:
4322: 1;
4323: __END__
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