1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.327 2006/04/18 20:45:40 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 $currentstring = '';
183: &Apache::lontexconvert::init_tth();
184: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
185: # start_body() takes care of emitting the <html>
186: } elsif ($target eq 'tex') {
187: $currentstring .= '\documentclass[letterpaper,twoside]{article}';
188: if (($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.=(<<EDITBUTTON);
538: <form method="post">
539: <input type="submit" name="editmode" accesskey="e" value="Edit" />
540: </form>
541: <br />
542: EDITBUTTON
543: }
544: $currentstring.=&Apache::lonxml::message_location();
545: } elsif ($target eq 'tex') {
546: $currentstring = '\begin{document}';
547: }
548: return $currentstring;
549: }
550:
551: sub end_body {
552: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
553: my $currentstring = &end_p(); # Close off unclosed <p>
554: if ($target eq 'web' || $target eq 'webgrade') {
555: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
556: } elsif ($target eq 'tex') {
557: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
558: }
559: return $currentstring;
560: }
561:
562: # \begin{center} causes a new paragprah spacing that looks odd inside
563: # of a table cell
564: sub center_correction { return '\vspace*{-6 mm}'; }
565: #-- <center> tag (end tag required)
566: sub start_center {
567: my ($target,$token,$tagstack) = @_;
568: my $currentstring = &end_p(); # Close off any prior para.
569: if ($target eq 'web' || $target eq 'webgrade') {
570: $currentstring .= $token->[4];
571: } elsif ($target eq 'tex') {
572: if (&is_inside_of($tagstack, "table")) {
573: $currentstring .= ¢er_correction();
574: }
575: $currentstring .= '\begin{center}';
576: }
577: return $currentstring;
578: }
579:
580: sub end_center {
581: my ($target,$token,$tagstack) = @_;
582: my $currentstring = '';
583: if ($target eq 'web' || $target eq 'webgrade') {
584: $currentstring = $token->[2];
585: } elsif ($target eq 'tex') {
586: $currentstring = '\end{center}';
587: }
588: return $currentstring;
589: }
590:
591: #-- <b> tag (end tag required)
592: # NOTE: In TeX mode disables internal <p>
593: sub start_b {
594: my ($target,$token) = @_;
595: my $currentstring = '';
596: if ($target eq 'web' || $target eq 'webgrade') {
597: $currentstring = $token->[4];
598: } elsif ($target eq 'tex') {
599: &disable_para();
600: $currentstring .= '\textbf{';
601: }
602: return $currentstring;
603: }
604:
605: sub end_b {
606: my ($target,$token) = @_;
607: my $currentstring = '';
608: if ($target eq 'web' || $target eq 'webgrade') {
609: $currentstring = $token->[2];
610: } elsif ($target eq 'tex') {
611: &enable_para();
612: $currentstring = '}';
613: }
614: return $currentstring;
615: }
616:
617: #-- <strong> tag (end tag required)
618: # NOTE: in TeX mode disables internal <p>
619: sub start_strong {
620: my ($target,$token) = @_;
621: my $currentstring = '';
622: if ($target eq 'web' || $target eq 'webgrade') {
623: $currentstring = $token->[4];
624: } elsif ($target eq 'tex') {
625: &disable_para();
626: $currentstring = '\textbf{';
627: }
628: return $currentstring;
629: }
630:
631: sub end_strong {
632: my ($target,$token) = @_;
633: my $currentstring = '';
634: if ($target eq 'web' || $target eq 'webgrade') {
635: $currentstring = $token->[2];
636: } elsif ($target eq 'tex') {
637: &enable_para();
638: $currentstring = '}';
639: }
640: return $currentstring;
641: }
642:
643: #-- <h1> tag (end tag required)
644: sub start_h1 {
645: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
646: my $currentstring = &end_p(); # Close off any prior para.
647: if ($target eq 'web' || $target eq 'webgrade') {
648: $currentstring .= $token->[4];
649: } elsif ($target eq 'tex') {
650: my $pre;
651: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
652: if ($align eq 'center') {
653: $pre='\begin{center}';
654: } elsif ($align eq 'left') {
655: $pre='\rlap{';
656: } elsif ($align eq 'right') {
657: $pre=' \hfill \llap{';
658: }
659: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
660: if (not defined $TeXsize) {$TeXsize="large";}
661: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
662: } elsif ($target eq 'meta') {
663: $currentstring.='<subject>';
664: &start_output($target);
665: }
666: return $currentstring;
667: }
668:
669: sub end_h1 {
670: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
671: my $currentstring = '';
672: if ($target eq 'web' || $target eq 'webgrade') {
673: $currentstring .= $token->[2];
674: } elsif ($target eq 'tex') {
675: my $post='\vskip 0 mm ';
676: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
677: if ($align eq 'center') {
678: $post='\end{center}';
679: } elsif ($align eq 'left') {
680: $post='} \hfill'.'\vskip 0 mm ';
681: } elsif ($align eq 'right') {
682: $post='}'.'\vskip 0 mm ';
683: }
684: $currentstring .= '}}'.$post;
685: } elsif ($target eq 'meta') {
686: &end_output($target);
687: $currentstring='</subject>';
688: }
689: return $currentstring;
690: }
691:
692: #-- <h2> tag
693: sub start_h2 {
694: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
695: my $currentstring = &end_p(); # Close off any prior para.
696: if ($target eq 'web' || $target eq 'webgrade') {
697: $currentstring .= $token->[4];
698: } elsif ($target eq 'tex') {
699: my $pre;
700: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
701: if ($align eq 'center') {
702: $pre='\begin{center}';
703: } elsif ($align eq 'left') {
704: $pre='\rlap{';
705: } elsif ($align eq 'right') {
706: $pre=' \hfill \llap{';
707: }
708: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
709: if (not defined $TeXsize) {$TeXsize="large";}
710: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
711: }
712: return $currentstring;
713: }
714:
715: sub end_h2 {
716: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
717: my $currentstring = '';
718: if ($target eq 'web' || $target eq 'webgrade') {
719: $currentstring .= $token->[2];
720: } elsif ($target eq 'tex') {
721: my $post='\vskip 0 mm ';
722: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
723: if ($align eq 'center') {
724: $post='\end{center}';
725: } elsif ($align eq 'left') {
726: $post='} \hfill'.'\vskip 0 mm ';
727: } elsif ($align eq 'right') {
728: $post='}'.'\vskip 0 mm ';
729: }
730: $currentstring .= '}}'.$post;
731: }
732: return $currentstring;
733: }
734:
735: #-- <h3> tag
736: sub start_h3 {
737: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
738: my $currentstring = &end_p(); # Close off any prior para.
739: if ($target eq 'web' || $target eq 'webgrade') {
740: $currentstring .= $token->[4];
741: } elsif ($target eq 'tex') {
742: my $pre;
743: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
744: if ($align eq 'center') {
745: $pre='\begin{center}';
746: } elsif ($align eq 'left') {
747: $pre='\rlap{';
748: } elsif ($align eq 'right') {
749: $pre=' \hfill \llap{';
750: }
751: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
752: if (not defined $TeXsize) {$TeXsize="large";}
753: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
754: }
755: return $currentstring;
756: }
757:
758: sub end_h3 {
759: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
760: my $currentstring = '';
761: if ($target eq 'web' || $target eq 'webgrade') {
762: $currentstring .= $token->[2];
763: } elsif ($target eq 'tex') {
764: my $post='\vskip 0 mm ';
765: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
766: if ($align eq 'center') {
767: $post='\end{center}';
768: } elsif ($align eq 'left') {
769: $post='} \hfill'.'\vskip 0 mm ';
770: } elsif ($align eq 'right') {
771: $post='}'.'\vskip 0 mm ';
772: }
773: $currentstring .= '}}'.$post;
774: }
775: return $currentstring;
776: }
777:
778: #-- <h4> tag
779: sub start_h4 {
780: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
781: my $currentstring = &end_p(); # Close off any prior para.
782: if ($target eq 'web' || $target eq 'webgrade') {
783: $currentstring .= $token->[4];
784: } elsif ($target eq 'tex') {
785: my $pre;
786: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
787: if ($align eq 'center') {
788: $pre='\begin{center}';
789: } elsif ($align eq 'left') {
790: $pre='\rlap{';
791: } elsif ($align eq 'right') {
792: $pre=' \hfill \llap{';
793: }
794: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
795: if (not defined $TeXsize) {$TeXsize="large";}
796: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
797: }
798: return $currentstring;
799: }
800:
801: sub end_h4 {
802: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
803: my $currentstring = '';
804: if ($target eq 'web' || $target eq 'webgrade') {
805: $currentstring .= $token->[2];
806: } elsif ($target eq 'tex') {
807: my $post='\vskip 0 mm ';
808: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
809: if ($align eq 'center') {
810: $post='\end{center}';
811: } elsif ($align eq 'left') {
812: $post='} \hfill'.'\vskip 0 mm ';
813: } elsif ($align eq 'right') {
814: $post='}'.'\vskip 0 mm ';
815: }
816: $currentstring .= '}}'.$post;
817: }
818: return $currentstring;
819: }
820:
821: #-- <h5> tag
822: sub start_h5 {
823: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
824: my $currentstring = &end_p(); # Close off any prior paras.
825: if ($target eq 'web' || $target eq 'webgrade') {
826: $currentstring .= $token->[4];
827: } elsif ($target eq 'tex') {
828: my $pre;
829: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
830: if ($align eq 'center') {
831: $pre='\begin{center}';
832: } elsif ($align eq 'left') {
833: $pre='\rlap{';
834: } elsif ($align eq 'right') {
835: $pre=' \hfill \llap{';
836: }
837: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
838: if (not defined $TeXsize) {$TeXsize="large";}
839: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
840: }
841: return $currentstring;
842: }
843:
844: sub end_h5 {
845: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
846: my $currentstring = '';
847: if ($target eq 'web' || $target eq 'webgrade') {
848: $currentstring .= $token->[2];
849: } elsif ($target eq 'tex') {
850: my $post='\vskip 0 mm ';
851: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
852: if ($align eq 'center') {
853: $post='\end{center}';
854: } elsif ($align eq 'left') {
855: $post='} \hfill'.'\vskip 0 mm ';
856: } elsif ($align eq 'right') {
857: $post='}'.'\vskip 0 mm ';
858: }
859: $currentstring .= '}}'.$post;
860: }
861: return $currentstring;
862: }
863:
864: #-- <h6> tag
865: sub start_h6 {
866: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
867: my $currentstring = &end_p(); # Close off any prior paras.
868: if ($target eq 'web' || $target eq 'webgrade') {
869: $currentstring .= $token->[4];
870: } elsif ($target eq 'tex') {
871: my $pre;
872: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
873: if ($align eq 'center') {
874: $pre='\begin{center}';
875: } elsif ($align eq 'left') {
876: $pre='\rlap{';
877: } elsif ($align eq 'right') {
878: $pre=' \hfill \llap{';
879: }
880: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
881: if (not defined $TeXsize) {$TeXsize="large";}
882: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
883: }
884: return $currentstring;
885: }
886:
887: sub end_h6 {
888: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
889: my $currentstring = '';
890: if ($target eq 'web' || $target eq 'webgrade') {
891: $currentstring .= $token->[2];
892: } elsif ($target eq 'tex') {
893: my $post='\vskip 0 mm ';
894: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
895: if ($align eq 'center') {
896: $post='\end{center}';
897: } elsif ($align eq 'left') {
898: $post='} \hfill'.'\vskip 0 mm ';
899: } elsif ($align eq 'right') {
900: $post='}'.'\vskip 0 mm ';
901: }
902: $currentstring .= '}}'.$post;
903: }
904: return $currentstring;
905: }
906:
907: #--- <cite> tag (end tag required)
908: sub start_cite {
909: my ($target,$token) = @_;
910: my $currentstring = '';
911: if ($target eq 'web' || $target eq 'webgrade') {
912: $currentstring .= $token->[4];
913: } elsif ($target eq 'tex') {
914: $currentstring .= '\textit{';
915: }
916: return $currentstring;
917: }
918:
919: sub end_cite {
920: my ($target,$token) = @_;
921: my $currentstring = '';
922: if ($target eq 'web' || $target eq 'webgrade') {
923: $currentstring .= $token->[2];
924: } elsif ($target eq 'tex') {
925: $currentstring .= '}';
926: }
927: return $currentstring;
928: }
929:
930: #-- <i> tag (end tag required)
931: sub start_i {
932: my ($target,$token) = @_;
933: my $currentstring = '';
934: if ($target eq 'web' || $target eq 'webgrade') {
935: $currentstring .= $token->[4];
936: } elsif ($target eq 'tex') {
937: $currentstring .= '\textit{';
938: }
939: return $currentstring;
940: }
941:
942: sub end_i {
943: my ($target,$token) = @_;
944: my $currentstring = '';
945: if ($target eq 'web' || $target eq 'webgrade') {
946: $currentstring .= $token->[2];
947: } elsif ($target eq 'tex') {
948: $currentstring .= '}';
949: }
950: return $currentstring;
951: }
952:
953: #-- <address> tag (end tag required)
954: sub start_address {
955: my ($target,$token) = @_;
956: my $currentstring = '';
957: if ($target eq 'web' || $target eq 'webgrade') {
958: $currentstring .= $token->[4];
959: } elsif ($target eq 'tex') {
960: $currentstring .= '\textit{';
961: }
962: return $currentstring;
963: }
964:
965: sub end_address {
966: my ($target,$token) = @_;
967: my $currentstring = '';
968: if ($target eq 'web' || $target eq 'webgrade') {
969: $currentstring .= $token->[2];
970: } elsif ($target eq 'tex') {
971: $currentstring .= '}';
972: }
973: return $currentstring;
974: }
975:
976: #-- <dfn> tag (end tag required)
977: sub start_dfn {
978: my ($target,$token) = @_;
979: my $currentstring = '';
980: if ($target eq 'web' || $target eq 'webgrade') {
981: $currentstring .= $token->[4];
982: } elsif ($target eq 'tex') {
983: $currentstring .= '\textit{';
984: }
985: return $currentstring;
986: }
987:
988: sub end_dfn {
989: my ($target,$token) = @_;
990: my $currentstring = '';
991: if ($target eq 'web' || $target eq 'webgrade') {
992: $currentstring .= $token->[2];
993: } elsif ($target eq 'tex') {
994: $currentstring .= '}';
995: }
996: return $currentstring;
997: }
998:
999: #-- <tt> tag (end tag required)
1000: sub start_tt {
1001: my ($target,$token) = @_;
1002: my $currentstring = '';
1003: if ($target eq 'web' || $target eq 'webgrade') {
1004: $currentstring .= $token->[4];
1005: } elsif ($target eq 'tex') {
1006: $currentstring .= '\texttt{';
1007: }
1008: return $currentstring;
1009: }
1010:
1011: sub end_tt {
1012: my ($target,$token) = @_;
1013: my $currentstring = '';
1014: if ($target eq 'web' || $target eq 'webgrade') {
1015: $currentstring .= $token->[2];
1016: } elsif ($target eq 'tex') {
1017: $currentstring .= '}';
1018: }
1019: return $currentstring;
1020: }
1021:
1022: #-- <kbd> tag (end tag required)
1023: sub start_kbd {
1024: my ($target,$token) = @_;
1025: my $currentstring = '';
1026: if ($target eq 'web' || $target eq 'webgrade') {
1027: $currentstring .= $token->[4];
1028: } elsif ($target eq 'tex') {
1029: $currentstring .= '\texttt{';
1030: }
1031: return $currentstring;
1032: }
1033:
1034: sub end_kbd {
1035: my ($target,$token) = @_;
1036: my $currentstring = '';
1037: if ($target eq 'web' || $target eq 'webgrade') {
1038: $currentstring .= $token->[2];
1039: } elsif ($target eq 'tex') {
1040: $currentstring .= '}';
1041: }
1042: return $currentstring;
1043: }
1044:
1045: #-- <code> tag (end tag required)
1046: sub start_code {
1047: my ($target,$token) = @_;
1048: my $currentstring = '';
1049: if ($target eq 'web' || $target eq 'webgrade') {
1050: $currentstring .= $token->[4];
1051: } elsif ($target eq 'tex') {
1052: $currentstring .= '\texttt{';
1053: }
1054: return $currentstring;
1055: }
1056:
1057: sub end_code {
1058: my ($target,$token) = @_;
1059: my $currentstring = '';
1060: if ($target eq 'web' || $target eq 'webgrade') {
1061: $currentstring .= $token->[2];
1062: } elsif ($target eq 'tex') {
1063: $currentstring .= '}';
1064: }
1065: return $currentstring;
1066: }
1067:
1068: #-- <em> tag (end tag required)
1069: sub start_em {
1070: my ($target,$token) = @_;
1071: my $currentstring = '';
1072: if ($target eq 'web' || $target eq 'webgrade') {
1073: $currentstring .= $token->[4];
1074: } elsif ($target eq 'tex') {
1075: $currentstring .= '\emph{';
1076: }
1077: return $currentstring;
1078: }
1079:
1080: sub end_em {
1081: my ($target,$token) = @_;
1082: my $currentstring = '';
1083: if ($target eq 'web' || $target eq 'webgrade') {
1084: $currentstring .= $token->[2];
1085: } elsif ($target eq 'tex') {
1086: $currentstring .= '}';
1087: }
1088: return $currentstring;
1089: }
1090:
1091: #-- <q> tag (end tag required)
1092: sub start_q {
1093: my ($target,$token) = @_;
1094: my $currentstring = '';
1095: if ($target eq 'web' || $target eq 'webgrade') {
1096: $currentstring .= $token->[4];
1097: } elsif ($target eq 'tex') {
1098: $currentstring .= '\emph{';
1099: }
1100: return $currentstring;
1101: }
1102:
1103: sub end_q {
1104: my ($target,$token) = @_;
1105: my $currentstring = '';
1106: if ($target eq 'web' || $target eq 'webgrade') {
1107: $currentstring .= $token->[2];
1108: } elsif ($target eq 'tex') {
1109: $currentstring .= '}';
1110: }
1111: return $currentstring;
1112: }
1113:
1114: # <p> is a bit strange since it does not require a closing </p>
1115: # However in latex, we must often output closing stuff to end
1116: # environments and {}'s etc. Therefore we do all the work
1117: # of figuring out the ending strings in the start tag processing,
1118: # and provide a mechanism to output the stop text external
1119: # to tag processing.
1120: #
1121: {
1122:
1123: my $closing_string = ''; # String required to close <p>
1124:
1125: # Some tags are <p> fragile meaning that <p> inside of them
1126: # does not work within TeX mode. This is managed via the
1127: # counter below:
1128: #
1129:
1130: my $para_disabled = 0;
1131:
1132: sub disable_para {
1133: $para_disabled++;
1134: }
1135: sub enable_para {
1136: $para_disabled--;
1137: }
1138:
1139:
1140: #-- <p> tag (end tag optional)
1141: #optional attribute - align="center|left|right"
1142: sub start_p {
1143: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1144: my $currentstring = '';
1145: if ($target eq 'web' || $target eq 'webgrade') {
1146: $currentstring .= &end_p(); # close off prior para if in progress.
1147: $currentstring .= $token->[4];
1148: if (! ($currentstring =~ /\//)) {
1149: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1150: }
1151: } elsif ($target eq 'tex' && !$para_disabled) {
1152:
1153: $currentstring .= &end_p(); # close off prior para if in progress.
1154: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1155: if ($align eq 'center') {
1156: $currentstring .='\begin{center}\par';
1157: $closing_string = '\end{center}';
1158: if (&is_inside_of($tagstack, "table")) {
1159: $currentstring = ¢er_correction().$currentstring;
1160: }
1161: } elsif ($align eq 'right') {
1162: $currentstring.="\n".'{\flushright ';
1163: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1164: $closing_string= "}\n";
1165: } elsif ($align eq 'left') {
1166: $currentstring.= "\n".'{\flushleft ';
1167: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1168: $closing_string = "}\n";
1169: } else {
1170: $currentstring.='\par ';
1171: if (&is_inside_of($tagstack, 'table')) {
1172: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1173: } else {
1174: $closing_string = '\strut\\\\\strut ';
1175: }
1176: }
1177:
1178: }
1179: return $currentstring;
1180: }
1181: #
1182: # End paragraph processing just requires that we output the
1183: # closing string that was saved and blank it.
1184: sub end_p {
1185: # Note only 'tex' mode uses disable_para and enable_para
1186: # so we don't need to know the target in the check below:
1187:
1188: if (!$para_disabled) {
1189: my $current_string = $closing_string;
1190: $closing_string = ''; # Not in a para anymore.
1191: return $current_string;
1192: } else {
1193: return '';
1194: }
1195:
1196: }
1197: }
1198: #-- <br> tag (end tag forbidden)
1199: sub start_br {
1200: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1201: my $currentstring = '';
1202: if ($target eq 'web' || $target eq 'webgrade') {
1203: $currentstring .= $token->[4];
1204: } elsif ($target eq 'tex') {
1205: my @tempo=@$tagstack;
1206: my $signal=0;
1207: # Not going to factor this to is_inside_of since that would require
1208: # multiple stack traversals.
1209: #
1210: for (my $i=$#tempo;$i>=0;$i--) {
1211: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1212: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1213: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1214: $signal=1;
1215: last;
1216: }
1217: }
1218: if ($signal) {
1219: $currentstring .= ' \vskip 0 mm ';
1220: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1221: $currentstring .= '\strut \\\\ \strut ';
1222: }
1223: }
1224: return $currentstring;
1225: }
1226:
1227: sub end_br {
1228: my ($target,$token) = @_;
1229: my $currentstring = '';
1230: if ($target eq 'web' || $target eq 'webgrade') {
1231: $currentstring .= $token->[2];
1232: }
1233: return $currentstring;
1234: }
1235:
1236: #-- <big> tag (end tag required)
1237: sub start_big {
1238: my ($target,$token) = @_;
1239: my $currentstring = '';
1240: if ($target eq 'web' || $target eq 'webgrade') {
1241: $currentstring .= $token->[4];
1242: } elsif ($target eq 'tex') {
1243: $currentstring .= '{\large ';
1244: }
1245: return $currentstring;
1246: }
1247:
1248: sub end_big {
1249: my ($target,$token) = @_;
1250: my $currentstring = '';
1251: if ($target eq 'web' || $target eq 'webgrade') {
1252: $currentstring .= $token->[2];
1253: } elsif ($target eq 'tex') {
1254: $currentstring .= '}';
1255: }
1256: return $currentstring;
1257: }
1258:
1259: #-- <small> tag (end tag required)
1260: sub start_small {
1261: my ($target,$token) = @_;
1262: my $currentstring = '';
1263: if ($target eq 'web' || $target eq 'webgrade') {
1264: $currentstring .= $token->[4];
1265: } elsif ($target eq 'tex') {
1266: $currentstring .= '{\footnotesize ';
1267: }
1268: return $currentstring;
1269: }
1270:
1271: sub end_small {
1272: my ($target,$token) = @_;
1273: my $currentstring = '';
1274: if ($target eq 'web' || $target eq 'webgrade') {
1275: $currentstring .= $token->[2];
1276: } elsif ($target eq 'tex') {
1277: $currentstring .= '}';
1278: }
1279: return $currentstring;
1280: }
1281:
1282: #-- <basefont> tag (end tag forbidden)
1283: sub start_basefont {
1284: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1285: my $currentstring = '';
1286: if ($target eq 'web' || $target eq 'webgrade') {
1287: $currentstring = $token->[4];
1288: } elsif ($target eq 'tex') {
1289: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1290: if (defined $basesize) {
1291: $currentstring = '{\\'.$basesize.' ';
1292: }
1293: }
1294: return $currentstring;
1295: }
1296:
1297: sub end_basefont {
1298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1299: my $currentstring = '';
1300: if ($target eq 'web' || $target eq 'webgrade') {
1301: $currentstring = $token->[4];
1302: } elsif ($target eq 'tex') {
1303: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1304: if (defined $basesize) {
1305: $currentstring = '}';
1306: }
1307: }
1308: return $currentstring;
1309: }
1310:
1311: #-- <font> tag (end tag required)
1312: sub start_font {
1313: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1314: my $currentstring = '';
1315: if ($target eq 'web' || $target eq 'webgrade') {
1316: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1317: if ($face!~/symbol/i) {
1318: if (($env{'browser.fontenhance'} eq 'on') ||
1319: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1320: }
1321: $currentstring = $token->[4];
1322: } elsif ($target eq 'tex') {
1323: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1324: if (defined $fontsize) {
1325: $currentstring = '{\\'.$fontsize.' ';
1326: }
1327: }
1328: return $currentstring;
1329: }
1330:
1331: sub end_font {
1332: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1333: my $currentstring = '';
1334: if ($target eq 'web' || $target eq 'webgrade') {
1335: $currentstring = $token->[2];
1336: } elsif ($target eq 'tex') {
1337: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1338: if (defined $fontsize) {
1339: $currentstring = '}';
1340: }
1341: }
1342: return $currentstring;
1343: }
1344:
1345: #-- <strike> tag (end tag required)
1346: sub start_strike {
1347: my ($target,$token) = @_;
1348: my $currentstring = '';
1349: if ($target eq 'web' || $target eq 'webgrade') {
1350: $currentstring .= $token->[4];
1351: } elsif ($target eq 'tex') {
1352: &Apache::lonxml::startredirection();
1353: }
1354: return $currentstring;
1355: }
1356:
1357: sub end_strike {
1358: my ($target,$token) = @_;
1359: my $currentstring = '';
1360: if ($target eq 'web' || $target eq 'webgrade') {
1361: $currentstring .= $token->[2];
1362: } elsif ($target eq 'tex') {
1363: $currentstring=&Apache::lonxml::endredirection();
1364: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1365: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1366: $currentstring=~s/(\S)\s*$/$1\}/;
1367: }
1368: return $currentstring;
1369: }
1370:
1371: #-- <s> tag (end tag required)
1372: sub start_s {
1373: my ($target,$token) = @_;
1374: my $currentstring = '';
1375: if ($target eq 'web' || $target eq 'webgrade') {
1376: $currentstring .= $token->[4];
1377: } elsif ($target eq 'tex') {
1378: &Apache::lonxml::startredirection();
1379: }
1380: return $currentstring;
1381: }
1382:
1383: sub end_s {
1384: my ($target,$token) = @_;
1385: my $currentstring = '';
1386: if ($target eq 'web' || $target eq 'webgrade') {
1387: $currentstring .= $token->[2];
1388: } elsif ($target eq 'tex') {
1389: $currentstring=&Apache::lonxml::endredirection();
1390: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1391: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1392: $currentstring=~s/(\S)\s*$/$1\}/;
1393: }
1394: return $currentstring;
1395: }
1396:
1397: #-- <sub> tag (end tag required)
1398: sub start_sub {
1399: my ($target,$token) = @_;
1400: my $currentstring = '';
1401: if ($target eq 'web' || $target eq 'webgrade') {
1402: $currentstring .= $token->[4];
1403: } elsif ($target eq 'tex') {
1404: $currentstring .= '\ensuremath{_{';
1405: }
1406: return $currentstring;
1407: }
1408:
1409: sub end_sub {
1410: my ($target,$token) = @_;
1411: my $currentstring = '';
1412: if ($target eq 'web' || $target eq 'webgrade') {
1413: $currentstring .= $token->[2];
1414: } elsif ($target eq 'tex') {
1415: $currentstring .= '}}';
1416: }
1417: return $currentstring;
1418: }
1419:
1420: #-- <sup> tag (end tag required)
1421: sub start_sup {
1422: my ($target,$token) = @_;
1423: my $currentstring = '';
1424: if ($target eq 'web' || $target eq 'webgrade') {
1425: $currentstring .= $token->[4];
1426: } elsif ($target eq 'tex') {
1427: $currentstring .= '\ensuremath{^{';
1428: }
1429: return $currentstring;
1430: }
1431:
1432: sub end_sup {
1433: my ($target,$token) = @_;
1434: my $currentstring = '';
1435: if ($target eq 'web' || $target eq 'webgrade') {
1436: $currentstring .= $token->[2];
1437: } elsif ($target eq 'tex') {
1438: $currentstring .= '}}';
1439: }
1440: return $currentstring;
1441: }
1442:
1443: #-- <hr> tag (end tag forbidden)
1444: sub start_hr {
1445: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1446: my $currentstring = &end_p(); # End enclosing para.
1447: if ($target eq 'web' || $target eq 'webgrade') {
1448: $currentstring .= $token->[4];
1449: } elsif ($target eq 'tex') {
1450: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1451: if (defined $LaTeXwidth) {
1452: if ($LaTeXwidth=~/^%/) {
1453: substr($LaTeXwidth,0,1)='';
1454: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1455: }
1456: } else {
1457: $LaTeXwidth ='0.9\textwidth';
1458: }
1459: my ($pre,$post);
1460: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1461: if (($align eq 'center') || (not defined $align)) {
1462: $pre=''; $post='';
1463: } elsif ($align eq 'left') {
1464: $pre='\rlap{'; $post='} \hfill';
1465: } elsif ($align eq 'right') {
1466: $pre=' \hfill \llap{'; $post='}';
1467: }
1468: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1469: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1470: }
1471: return $currentstring;
1472: }
1473:
1474: sub end_hr {
1475: my ($target,$token) = @_;
1476: my $currentstring = '';
1477: if ($target eq 'web' || $target eq 'webgrade') {
1478: $currentstring .= $token->[2];
1479: }
1480: return $currentstring;
1481: }
1482:
1483: #-- <div> tag (end tag required)
1484: {
1485:
1486: # Since div can be nested, the stack below is used
1487: # in 'tex' mode to store the ending strings
1488: # for the div stack.
1489:
1490: my @div_end_stack;
1491:
1492: sub start_div {
1493: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1494: my $currentstring = &end_p(); # Close enclosing para.
1495: if ($target eq 'web' || $target eq 'webgrade') {
1496: $currentstring .= $token->[4];
1497: }
1498: if ($target eq 'tex') {
1499: # 4 possible alignments: left, right, center, and -missing-.
1500:
1501: my $endstring = '';
1502:
1503: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1504: $safeeval, undef, 1));
1505: if ($align eq 'center') {
1506: $currentstring .= '\begin{center}';
1507: $endstring = '\end{center}';
1508: if (&is_inside_of($tagstack, "table")) {
1509: $currentstring = ¢er_correction().$currentstring;
1510: }
1511: }
1512: elsif ($align eq 'right') {
1513: $currentstring .= '\begin{flushright}';
1514: $endstring .= '\end{flushright}';
1515: } elsif ($align eq 'left') {
1516: $currentstring .= '\begin{flushleft}';
1517: $endstring = '\end{flushleft}';
1518: } else {
1519:
1520: }
1521: $currentstring .= "\n"; # For human readability.
1522: $endstring = "\n$endstring\n"; # For human readability
1523: push(@div_end_stack, $endstring);
1524: }
1525: return $currentstring;
1526: }
1527:
1528: sub end_div {
1529: my ($target,$token) = @_;
1530: my $currentstring = '';
1531: if ($target eq 'web' || $target eq 'webgrade') {
1532: $currentstring .= $token->[2];
1533: }
1534: if ($target eq 'tex') {
1535: my $endstring = pop @div_end_stack;
1536: $currentstring .= $endstring;
1537: }
1538: return $currentstring;
1539: }
1540: }
1541:
1542: #-- <a> tag (end tag required)
1543: sub start_a {
1544: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1545: my $currentstring = '';
1546: if ($target eq 'web' || $target eq 'webgrade') {
1547: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1548: undef,1);
1549: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1550: } elsif ($target eq 'tex') {
1551: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1552: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1553: if ($a=~/\S/) {
1554: $a=~s/([^\\])%/$1\\\%/g;
1555: $currentstring .= '\ref{URI: '.$a.'}';
1556: } elsif ($b=~/\S/) {
1557: $currentstring .= '\ref{Anchor: '.$b.'}';
1558: } else {
1559: $currentstring.='';
1560: }
1561: }
1562: return $currentstring;
1563: }
1564:
1565: sub end_a {
1566: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1567: my $currentstring = '';
1568: if ($target eq 'web' || $target eq 'webgrade') {
1569: $currentstring .= $token->[2];
1570: }
1571: return $currentstring;
1572: }
1573:
1574: #-- <li> tag (end tag optional)
1575: sub start_li {
1576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1577: my $currentstring = '';
1578: if ($target eq 'web' || $target eq 'webgrade') {
1579: $currentstring = $token->[4];
1580: } elsif ($target eq 'tex') {
1581: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1582: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1583: #FIXME need to support types i and I
1584: if ($type=~/disc/) {
1585: $currentstring .= ' \item[$\bullet$] ';
1586: } elsif ($type=~/circle/) {
1587: $currentstring .= ' \item[$\circ$] ';
1588: } elsif ($type=~/square/) {
1589: $currentstring .= ' \item[$\diamond$] ';
1590: } elsif ($type eq '1') {
1591: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1592: } elsif ($type eq 'A') {
1593: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1594: } elsif ($type eq 'a') {
1595: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1596: } elsif ($value ne '') {
1597: $currentstring .= ' \item['.$value.'] ';
1598: } else {
1599: $currentstring .= ' \item ';
1600: }
1601: $Apache::londefdef::list_index++;
1602: }
1603: return $currentstring;
1604: }
1605:
1606: sub end_li {
1607: my ($target,$token) = @_;
1608: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1609: if ($target eq 'web' || $target eq 'webgrade') {
1610: $currentstring .= $token->[2];
1611: }
1612: return $currentstring;
1613: }
1614:
1615: #-- <u> tag (end tag required)
1616: sub start_u {
1617: my ($target,$token) = @_;
1618: my $currentstring = '';
1619: if ($target eq 'web' || $target eq 'webgrade') {
1620: $currentstring .= $token->[4];
1621: } elsif ($target eq 'tex') {
1622: &Apache::lonxml::startredirection();
1623: }
1624: return $currentstring;
1625: }
1626:
1627: sub end_u {
1628: my ($target,$token) = @_;
1629: my $currentstring = '';
1630: if ($target eq 'web' || $target eq 'webgrade') {
1631: $currentstring .= $token->[2];
1632: } elsif ($target eq 'tex') {
1633: $currentstring=&Apache::lonxml::endredirection();
1634: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1635: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1636: $currentstring=~s/(\S)\s*$/$1\}/;
1637: }
1638: return $currentstring;
1639: }
1640:
1641: #-- <ul> tag (end tag required)
1642: sub start_ul {
1643: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1644: my $currentstring = &end_p(); # Close off enclosing list.
1645: if ($target eq 'web' || $target eq 'webgrade') {
1646: $currentstring .= $token->[4];
1647: } elsif ($target eq 'tex') {
1648: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1649: $Apache::londefdef::list_index=0;
1650: if ($TeXtype eq 'disc') {
1651: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1652: '\renewcommand{\labelitemii}{$\bullet$}'.
1653: '\renewcommand{\labelitemiii}{$\bullet$}'.
1654: '\renewcommand{\labelitemiv}{$\bullet$}';
1655: } elsif ($TeXtype eq 'circle') {
1656: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1657: '\renewcommand{\labelitemii}{$\circ$}'.
1658: '\renewcommand{\labelitemiii}{$\circ$}'.
1659: '\renewcommand{\labelitemiv}{$\circ$}';
1660: } elsif ($TeXtype eq 'square') {
1661: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1662: '\renewcommand{\labelitemii}{$\diamond$}'.
1663: '\renewcommand{\labelitemiii}{$\diamond$}'.
1664: '\renewcommand{\labelitemiv}{$\diamond$}';
1665: }
1666: $currentstring .= '\strut \begin{itemize}';
1667: }
1668: return $currentstring;
1669: }
1670:
1671: sub end_ul {
1672: my ($target,$token) = @_;
1673: my $currentstring = '';
1674: if ($target eq 'web' || $target eq 'webgrade') {
1675: $currentstring = $token->[2];
1676: } elsif ($target eq 'tex') {
1677: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1678: '\renewcommand{\labelitemii}{$\bullet$}'.
1679: '\renewcommand{\labelitemiii}{$\bullet$}'.
1680: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1681: }
1682: return $currentstring;
1683: }
1684:
1685: #-- <menu> tag (end tag required)
1686: sub start_menu {
1687: my ($target,$token) = @_;
1688: my $currentstring = '';
1689: if ($target eq 'web' || $target eq 'webgrade') {
1690: $currentstring = $token->[4];
1691: } elsif ($target eq 'tex') {
1692: $currentstring = " \\begin{itemize} ";
1693: }
1694: return $currentstring;
1695: }
1696:
1697: sub end_menu {
1698: my ($target,$token) = @_;
1699: my $currentstring = '';
1700: if ($target eq 'web' || $target eq 'webgrade') {
1701: $currentstring = $token->[2];
1702: } elsif ($target eq 'tex') {
1703: $currentstring = " \\end{itemize}";
1704: }
1705: return $currentstring;
1706: }
1707:
1708: #-- <dir> tag (end tag required)
1709: sub start_dir {
1710: my ($target,$token) = @_;
1711: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1712: if ($target eq 'web' || $target eq 'webgrade') {
1713: $currentstring .= $token->[4];
1714: } elsif ($target eq 'tex') {
1715: $currentstring .= " \\begin{itemize} ";
1716: }
1717: return $currentstring;
1718: }
1719:
1720: sub end_dir {
1721: my ($target,$token) = @_;
1722: my $currentstring = '';
1723: if ($target eq 'web' || $target eq 'webgrade') {
1724: $currentstring = $token->[2];
1725: } elsif ($target eq 'tex') {
1726: $currentstring = " \\end{itemize}";
1727: }
1728: return $currentstring;
1729: }
1730:
1731: #-- <ol> tag (end tag required)
1732: sub start_ol {
1733: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1734: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1735: if ($target eq 'web' || $target eq 'webgrade') {
1736: $currentstring .= $token->[4];
1737: } elsif ($target eq 'tex') {
1738: $Apache::londefdef::list_index=0;
1739: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1740: if ($type eq '1') {
1741: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1742: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1743: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1744: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1745: } elsif ($type eq 'A') {
1746: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1747: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1748: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1749: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1750: } elsif ($type eq 'a') {
1751: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1752: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1753: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1754: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1755: } elsif ($type eq 'i') {
1756: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1757: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1758: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1759: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1760: } elsif ($type eq 'I') {
1761: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1762: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1763: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1764: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1765: }
1766: $currentstring .= '\strut \begin{enumerate}';
1767: }
1768: return $currentstring;
1769: }
1770:
1771: sub end_ol {
1772: my ($target,$token) = @_;
1773: my $currentstring = '';
1774: if ($target eq 'web' || $target eq 'webgrade') {
1775: $currentstring = $token->[2];
1776: } elsif ($target eq 'tex') {
1777: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1778: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1779: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1780: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1781: }
1782: return $currentstring;
1783: }
1784:
1785: #-- <dl> tag (end tag required)
1786: sub start_dl {
1787: my ($target,$token) = @_;
1788: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1789: if ($target eq 'web' || $target eq 'webgrade') {
1790: $currentstring .= $token->[4];
1791: } elsif ($target eq 'tex') {
1792: $currentstring .= '\begin{description}';
1793: $Apache::londefdef::DL++;
1794: push(@Apache::londefdef::description,[]);
1795: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1796: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1797: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1798: }
1799: return $currentstring;
1800: }
1801:
1802: sub end_dl {
1803: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1804: my $currentstring = '';
1805: if ($target eq 'web' || $target eq 'webgrade') {
1806: $currentstring = $token->[2];
1807: } elsif ($target eq 'tex') {
1808: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1809: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1810: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1811: $currentstring.=' '.$element.' ';
1812: }
1813: pop(@Apache::londefdef::description);
1814: $currentstring.='\end{description}';
1815: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1816: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1817: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1818: $Apache::londefdef::DL--;
1819: }
1820: return $currentstring;
1821: }
1822:
1823: #-- <dt> tag (end tag optional)
1824: sub start_dt {
1825: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1826: my $currentstring='';
1827: if ($target eq 'web' || $target eq 'webgrade') {
1828: $currentstring = $token->[4];
1829: } elsif ($target eq 'tex') {
1830: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1831: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1832: &Apache::lonxml::startredirection();
1833: $Apache::londefdef::DT[-1]++;
1834: $Apache::londefdef::seenDT[-1]=1;
1835: }
1836: return $currentstring;
1837: }
1838:
1839: sub end_dt {
1840: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1841: my $currentstring = '';
1842: if ($target eq 'web' || $target eq 'webgrade') {
1843: $currentstring = $token->[2];
1844: } elsif ($target eq 'tex') {
1845: if ($Apache::londefdef::DT[-1]) {
1846: my $data=&item_cleanup();
1847: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1848: $Apache::londefdef::DT[-1]--;
1849: }
1850: }
1851: return $currentstring;
1852: }
1853:
1854: sub item_cleanup {
1855: my $item=&Apache::lonxml::endredirection();
1856: $item=~s/\\begin{center}//g;
1857: $item=~s/\\end{center}//g;
1858: return $item;
1859: }
1860:
1861: #-- <dd> tag (end tag optional)
1862: sub start_dd {
1863: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1864: my $currentstring = '';
1865: if ($target eq 'web' || $target eq 'webgrade') {
1866: $currentstring = $token->[4];
1867: } elsif ($target eq 'tex') {
1868: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1869: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1870: if (!$Apache::londefdef::seenDT[-1]) {
1871: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1872: }
1873: push(@{$Apache::londefdef::description[-1]},'');
1874: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1875: $Apache::londefdef::DD[-1]++;
1876: &Apache::lonxml::startredirection();
1877: }
1878: return $currentstring;
1879: }
1880:
1881: sub end_dd {
1882: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1883: my $currentstring = '';
1884: if ($target eq 'web' || $target eq 'webgrade') {
1885: $currentstring = $token->[2];
1886: } elsif ($target eq 'tex') {
1887: $Apache::londefdef::description[-1]->[-1].=
1888: &Apache::lonxml::endredirection().' \vskip 0mm ';
1889: $Apache::londefdef::DD[-1]--;
1890: }
1891: return $currentstring;
1892: }
1893:
1894: #-- <table> tag (end tag required)
1895: # <table> also ends any prior <p> that is not closed.
1896: # but, unless I allow <p>'s to nest, that's the
1897: # only way I could think of to allow <p> in
1898: # <tr> <th> bodies
1899: #
1900: #list of supported attributes: border,width,TeXwidth
1901: sub start_table {
1902: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1903: my $textwidth = '';
1904: my $currentstring = &end_p();
1905: if ($target eq 'web' || $target eq 'webgrade') {
1906: $currentstring .= $token->[4];
1907: } elsif ($target eq 'tex') {
1908: my $aa = {};
1909: push @Apache::londefdef::table, $aa;
1910: $Apache::londefdef::table[-1]{'row_number'} = -1;
1911: #maximum table's width (default coincides with text line length)
1912: if ($#Apache::londefdef::table==0) {
1913: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1914: $textwidth=~/(\d+\.?\d*)/;
1915: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1916: } else {
1917: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1918: #the maximum width of nested table is determined by LATeX width of parent cell
1919: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1920: } else {
1921: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1922: $textwidth=$Apache::londefdef::table[-2]{'width'};
1923: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1924: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1925: }
1926: }
1927: }
1928:
1929: # width either comes forced from the TeXwidth or the width parameters.
1930: # in either case it can be a percentage or absolute width.
1931: # in the width case we ignore absolute width
1932: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1933: if (!defined($TeXwidth)) {
1934: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1935: $safeeval,undef,1);
1936: if ($htmlwidth =~ /%/) {
1937: $TeXwidth = $htmlwidth;
1938: } else {
1939: $TeXwidth = $textwidth;
1940: }
1941: } else {
1942: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1943: }
1944: if ($TeXwidth=~/%/) {
1945: $Apache::londefdef::table[-1]{'percent'}=1;
1946: $TeXwidth=~/(\d+)/;
1947: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1948: } else {
1949: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1950: }
1951: # In the end, however the table width cannot be wider than $textwidth...
1952:
1953: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1954: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1955: }
1956:
1957: #table's border
1958: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1959: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1960: unless (defined $border) { $border = 0; }
1961: if ($border) {
1962: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1963: $Apache::londefdef::table[-1]{'vinc'} = '&';
1964: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1965: } else {
1966: $Apache::londefdef::table[-1]{'hinc'} = '';
1967: $Apache::londefdef::table[-1]{'vinc'} = '&';
1968: $Apache::londefdef::table[-1]{'vvinc'} = '';
1969: }
1970: if ($#Apache::londefdef::table==0) {
1971: # Note that \newline seems to destroy the alignment envs.
1972: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1973: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1974: }
1975: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1976: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1977: $Apache::londefdef::table[-1]{'objectlen'}=[];
1978: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1979: $Apache::londefdef::table[-1]{'maxlen'}=[];
1980: $Apache::londefdef::table[-1]{'minlen'}=[];
1981: $Apache::londefdef::table[-1]{'content'}=[];
1982: $Apache::londefdef::table[-1]{'align'}=[];
1983: $currentstring.='\keephidden{NEW TABLE ENTRY}';
1984:
1985:
1986: }
1987: return $currentstring;
1988: }
1989:
1990: sub end_table {
1991: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1992: my $currentstring = '';
1993: if ($target eq 'web' || $target eq 'webgrade') {
1994: $currentstring = $token->[2];
1995: } elsif ($target eq 'tex') {
1996: my $inmemory = '';
1997: my $output = '';
1998: my $WARNING='';
1999: #width of columns from TeXwidth attributes
2000:
2001: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2002: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2003: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2004: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2005: }
2006: }
2007: }
2008: #free space and number of empty columns
2009: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2010: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2011: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2012: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2013: $empty_columns++;
2014: } else {
2015: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2016: }
2017: }
2018: #boundaries for contents columns
2019: my @min_len=();#columns can not be narrower
2020: my @max_len=();#maximum length of column
2021: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2022: my ($localmin,$localmax)=(0,0);
2023: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2024: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2025: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2026: }
2027: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2028: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2029: }
2030: }
2031: push @min_len, $localmin;
2032: push @max_len, $localmax;
2033: }
2034: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2035: my $localmin=0,;
2036: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2037: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2038: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2039: }
2040: }
2041: if ($max_len[$jn]<$localmin) {
2042: $max_len[$jn]=$localmin;
2043: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2044: }#object size is bigger
2045: if ($min_len[$jn]<$localmin) {
2046: $min_len[$jn]=$localmin;
2047: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2048: }#object size is bigger
2049: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2050: $min_len[$jn]=0;
2051: $max_len[$jn]=0;
2052: }
2053: }
2054: #final adjustment of column width
2055: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2056: my @adjust=();
2057: #step 1. adjustment by maximum value
2058: my $space_neeeded=0;
2059: for (my $jn=0;$jn<=$#max_len;$jn++) {
2060: $space_neeeded=$space_neeeded+$max_len[$jn];
2061: }
2062: if ($space_neeeded<=$available_space) {
2063: for (my $jn=0;$jn<=$#max_len;$jn++) {
2064: if ($fwidth[$jn]==0) {
2065: $fwidth[$jn]=$max_len[$jn];
2066: }
2067: }
2068: } else {
2069: #step 2. adjustment by minimum value (estimation)
2070: $space_neeeded=0;
2071: for (my $jn=0;$jn<=$#min_len;$jn++) {
2072: $space_neeeded+=$min_len[$jn];
2073: }
2074: if ($space_neeeded>$available_space) {
2075: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2076: for (my $jn=0;$jn<=$#max_len;$jn++) {
2077: if ($fwidth[$jn]==0) {
2078: $fwidth[$jn]=$min_len[$jn];
2079: }
2080: }
2081: #check if we have objects which can be scaled
2082: my $how_many_to_scale=0;
2083: my @to_scale=();
2084: for (my $jn=0;$jn<=$#max_len;$jn++) {
2085: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2086: $how_many_to_scale++;
2087: push @to_scale, $jn;
2088: }
2089: }
2090: if ($how_many_to_scale>0) {
2091: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2092: foreach my $jn (@to_scale) {
2093: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2094: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2095: if ($1 ne '') {
2096: my $current_length=&recalc($1);
2097: $current_length=~/(\d+\.?\d*)/;
2098: $current_length=$current_length-$space_to_adjust;
2099: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2100: }
2101: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2102: if ($1 ne '') {
2103: my $current_length=$1;
2104: $current_length=$current_length-$space_to_adjust;
2105: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2106: }
2107: }
2108: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2109: }
2110: }
2111: } else {
2112: #step 3. adjustment over minimal + corrections
2113: my $enlarge_coef=$available_space/$space_neeeded;
2114: my $acsessive=0;
2115: for (my $jn=0;$jn<=$#min_len;$jn++) {
2116: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2117: if ($adjust[$jn]>$max_len[$jn]) {
2118: $fwidth[$jn]=$max_len[$jn];
2119: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2120: $adjust[$jn]=0;
2121: }
2122: }
2123: if ($acsessive>0) {
2124: #we have an excess of space and can redistribute it
2125: my $notempty_columns=0;
2126: for (my $jn=0;$jn<=$#min_len;$jn++) {
2127: if ($adjust[$jn]!=0) {
2128: $notempty_columns++;
2129: }
2130: }
2131: my $per_column=$acsessive/$notempty_columns;
2132: for (my $jn=0;$jn<=$#min_len;$jn++) {
2133: if ($adjust[$jn]!=0) {
2134: $adjust[$jn]+=$per_column;
2135: $fwidth[$jn]=$adjust[$jn];
2136: }
2137: }
2138: } else {
2139: for (my $jn=0;$jn<=$#min_len;$jn++) {
2140: $fwidth[$jn]=$adjust[$jn];
2141: }
2142: }
2143: }
2144: }
2145: #use all available width if it is defined in % or as TeXwidth
2146: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2147: my $current=0;
2148: for (my $i=0;$i<=$#fwidth;$i++) {
2149: $current+=$fwidth[$i];
2150: }
2151: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2152: for (my $i=0;$i<=$#fwidth;$i++) {
2153: $fwidth[$i]*=$coef;
2154: }
2155: }
2156: #removing of empty columns if allowed
2157: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2158: if ($permission eq 'yes') {
2159: my @cleaned_table=();
2160: my @cleaned_header=();
2161: my $colind=0;
2162: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2163: if ($fwidth[$jn]!=0) {
2164: #we need to copy column
2165: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2166: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2167: $cleaned_header[$colind]=$fwidth[$jn];
2168: }
2169: $colind++;
2170: }
2171: }
2172: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2173: @fwidth=@cleaned_header;
2174: }
2175: #construct header of the table
2176: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2177: for (my $in=0;$in<=$#fwidth;$in++) {
2178: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2179: }
2180: $header_of_table .= '}';
2181: #fill the table
2182: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2183: my $have_rowspan = 0;
2184: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2185:
2186: #-----------------------------------------------------------
2187: # I think this order of doing things will ensure that
2188: # single rowspan, columspan and combined row/colspans will
2189: # work correctly. LaTeX is delicate here.
2190: # RF.
2191:
2192: # Start a rowspan if necessary:
2193:
2194: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2195: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2196: #
2197: # Do the appropriate magic if this has a colspan
2198: #
2199:
2200: if ($colspan > 1) {
2201: $output .= '\multicolumn{'.
2202: $colspan
2203: .'}{|l|}{';
2204: }
2205:
2206: if ($rowspan > 1) {
2207: $have_rowspan++;
2208: $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
2209: }
2210: if (($rowspan eq '^') || ($rowspan eq '_')) {
2211: $have_rowspan++;
2212: }
2213: #--------------------------------------------------------------
2214:
2215: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2216: $output.=¢er_correction().'\begin{center}';
2217: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2218: $output.=' \hfill \llap{'
2219: }
2220: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2221: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2222: $output.='\end{center}';
2223: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2224: $output.='} ';
2225: }
2226: # Close off any open multirow:
2227:
2228: if ($rowspan > 1) {
2229: $output .= '}';
2230: }
2231: # Close off the colspan...
2232: #
2233: if ($colspan > 1) {
2234: $output .= '}';
2235: $jn += $colspan-1; # Adjust for number of rows really left.
2236: }
2237: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2238: }
2239: # If have_rowspan > 0, and borders are on, then
2240: # we need to do more than put an \hline at the bottom of row.
2241: # we need to do the appropriate \cline to ensure that
2242: # the spanned rows don't have \hlines through them.
2243:
2244: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2245: $output .= ' \\\\ ';
2246: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2247: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2248: if ($rowspan ne "^") {
2249: if (($rowspan <= 1) || ($rowspan eq '_')) {
2250: my $column = $jn+1;
2251: $output .= '\cline{'.$column.'-'.$column.'} ';
2252: }
2253: }
2254: }
2255:
2256: } else {
2257: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2258: }
2259: }
2260: # Note that \newline destroys alignment env's produced by e.g. <div>
2261: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2262: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2263: if ($#Apache::londefdef::table > 0) {
2264: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2265: # Figure out max/and min width by summing us and then
2266: # apply that to the current column of the table we nest in
2267: # if it's larger than the current width or the current width
2268: # is undefined.
2269: #
2270: my $min_nested_width = 0;
2271: my $max_nested_width = 0;
2272: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2273: $min_nested_width += $min_len[$col];
2274: $max_nested_width += $max_len[$col];
2275:
2276: }
2277: # Fudge in an extra 5 mm for borders etc:
2278:
2279: $min_nested_width += 5;
2280: $max_nested_width += 5;
2281:
2282: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2283: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2284: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2285: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2286: }
2287: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2288: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2289: }
2290:
2291: pop @Apache::londefdef::table;
2292: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2293: } else {
2294: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2295: pop @Apache::londefdef::table;
2296: undef @Apache::londefdef::table;
2297: }
2298: }
2299: return $currentstring;
2300: }
2301:
2302: #-- <tr> tag (end tag optional)
2303: sub start_tr {
2304: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2305: my $currentstring = '';
2306: if ($target eq 'web' || $target eq 'webgrade') {
2307: $currentstring = $token->[4];
2308: } elsif ($target eq 'tex') {
2309: $Apache::londefdef::table[-1]{'row_number'}++;
2310: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2311: if ($alignchar ne '') {
2312: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2313: } else {
2314: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2315: }
2316: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2317: #
2318: # Need to save the number of table columns to preserve the max # columns.
2319: #
2320: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2321: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2322: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2323: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2324: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2325: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2326: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2327: }
2328: return $currentstring;
2329: }
2330:
2331: sub end_tr {
2332: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2333: my $currentstring = &end_p(); # Close any pending <p> in the row.
2334: if ($target eq 'web' || $target eq 'webgrade') {
2335: $currentstring .= $token->[2];
2336: } elsif ($target eq 'tex') {
2337: if ($Apache::londefdef::TD_redirection) {
2338: &end_td_tex($parstack,$parser,$safeeval);
2339: }
2340: # Counter columns must be the maximum number of columns seen
2341: # in the table so far so:
2342: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2343: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2344: }
2345:
2346:
2347:
2348: }
2349: return $currentstring;
2350: }
2351:
2352: #-- <td> tag (end tag optional)
2353: sub start_td {
2354: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2355: my $currentstring = '';
2356: if ($target eq 'web' || $target eq 'webgrade') {
2357: $currentstring = $token->[4];
2358: } elsif ($target eq 'tex') {
2359: $Apache::londefdef::TD_redirection = 1;
2360: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2361: }
2362: return $currentstring;
2363: }
2364:
2365: sub tag_check {
2366: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2367: my @ar=@$parstack;
2368: for (my $i=$#ar-1;$i>=0;$i--) {
2369: if (lc($$tagstack[$i]) eq $good_tag) {
2370: &start_td_tex($parstack,$parser,$safeeval);
2371: last;
2372: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2373: splice @ar, $i+1;
2374: &end_td_tex(\@ar,$parser,$safeeval);
2375: &start_td_tex($parstack,$parser,$safeeval);
2376: last;
2377: }
2378: }
2379: return '';
2380: }
2381:
2382: sub start_td_tex {
2383: my ($parstack,$parser,$safeeval) = @_;
2384: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2385: if ($alignchar eq '') {
2386: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2387: }
2388: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2389: $Apache::londefdef::table[-1]{'counter_columns'}++;
2390: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2391: if (defined $TeXwidth) {
2392: my $current_length=&recalc($TeXwidth);
2393: $current_length=~/(\d+\.?\d*)/;
2394: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2395: }
2396: &Apache::lonxml::startredirection();
2397: return '';
2398: }
2399:
2400: sub end_td_tex {
2401: my ($parstack,$parser,$safeeval) = @_;
2402: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2403: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2404: my $data = &Apache::lonxml::endredirection();
2405:
2406: # The rowspan array of the table indicates which cells are part of a span.
2407: # n indicates the start of a span set of n rows.
2408: # ^ indicates a cell that continues a span set.
2409: # _ indicates the cell is at the bottom of a span set.
2410: # If this and subsequent cells are part of a rowspan, we must
2411: # push along the row until we find one that is not.
2412:
2413: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2414: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2415: # Part of a span.
2416: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2417: $current_column++;
2418: }
2419: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2420:
2421:
2422: # Get the column and row spans.
2423: # Colspan can be done via \multicolumn if I can figure out the data structs.
2424:
2425: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2426: if (!$colspan) {
2427: $colspan = 1;
2428: }
2429:
2430: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2431: if (!$rowspan) {
2432: $rowspan = 1;
2433: }
2434:
2435:
2436:
2437: for (my $c = 0; $c < $colspan; $c++) {
2438: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2439: for (my $i = 1; $i < $rowspan; $i++) {
2440: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2441: if ($i == ($rowspan-1)) {
2442: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2443: }
2444: }
2445: }
2446:
2447: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2448: if (defined $TeXwidth) {
2449: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2450: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2451: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2452: } else {
2453: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2454: my $garbage_data=$data;
2455: my $fwidth=0;
2456: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2457: my $current_length=&recalc($1);
2458: $current_length=~/(\d+\.?\d*)/;
2459: if ($fwidth<$1) {$fwidth=$1;}
2460: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2461: }
2462: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2463: my $current_length=$1;
2464: if ($fwidth<$current_length) {$fwidth=$current_length;}
2465: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2466: }
2467: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2468: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2469: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2470: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2471: } elsif ($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)*/) {
2472: my $garbage_data=$data;
2473: my $fwidth=0;
2474: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2475: my $current_length=&recalc($1);
2476: $current_length=~/(\d+\.?\d*)/;
2477: if ($fwidth<$1) {$fwidth=$1;}
2478: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2479: }
2480: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2481: my $current_length=&recalc($1);
2482: $current_length=~/(\d+\.?\d*)/;
2483: if ($fwidth<$1) {$fwidth=$1;}
2484: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2485: }
2486: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2487: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2488: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2489: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2490: $data=~s/\\\\\s*$//;
2491: } else {
2492: $data=~s/^\s+(\S.*)/$1/;
2493: $data=~s/(.*\S)\s+$/$1/;
2494: $data=~s/(\s)+/$1/;
2495: my ($current_length,$min_length)=(0,0);
2496: if ($data=~/\\vskip/) {
2497: my $newdata=$data;
2498: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2499: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2500: foreach my $elementdata (@newdata) {
2501: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2502: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2503: my @words=split(/ /,$elementdata);
2504: foreach my $word (@words) {
2505: my $lengthword=2.5*&LATEX_length($word);
2506: if ($min_length<$lengthword) {$min_length=$lengthword;}
2507: }
2508: }
2509: } else {
2510: $current_length=2.5*&LATEX_length($data);
2511: my @words=split(/ /,$data);
2512: foreach my $word (@words) {
2513: my $lengthword=2*&LATEX_length($word);
2514: if ($min_length<$lengthword) {$min_length=$lengthword;}
2515: }
2516: }
2517: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2518: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2519: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2520: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2521: }
2522: }
2523: # Substitute all of the tables nested in this cell in their appropriate places.
2524:
2525:
2526: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2527: for (my $in=0; $in<=$nested_count; $in++) {
2528: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2529: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2530: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2531: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2532:
2533: }
2534: # Should be be killing off the 'include' elements as they're used up?
2535:
2536: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2537:
2538:
2539:
2540:
2541: # the colspan array will indicate how many columns will be spanned by this
2542: # cell..this requires that counter_columns also be adjusted accordingly
2543: # so that the next bunch of text goes in the right cell. Note that since
2544: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2545: #
2546:
2547: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2548: for (my $i = 0; $i < ($colspan -1); $i++) {
2549: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2550: }
2551: for (my $r = 0; $r < $rowspan; $r++) {
2552: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2553: # Put empty text in spanned cols.
2554:
2555: }
2556:
2557:
2558:
2559: return '';
2560: }
2561:
2562: sub end_td {
2563: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2564: my $currentstring = '';
2565: if ($target eq 'web' || $target eq 'webgrade') {
2566: $currentstring = $token->[2];
2567: } elsif ($target eq 'tex') {
2568: $Apache::londefdef::TD_redirection =0;
2569: &end_td_tex($parstack,$parser,$safeeval);
2570: }
2571: return $currentstring;
2572: }
2573:
2574: #-- <th> tag (end tag optional)
2575: sub start_th {
2576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2577: my $currentstring = '';
2578: if ($target eq 'web' || $target eq 'webgrade') {
2579: $currentstring = $token->[4];
2580: } elsif ($target eq 'tex') {
2581: $Apache::londefdef::TD_redirection = 1;
2582: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2583: }
2584: return $currentstring;
2585: }
2586:
2587: sub tagg_check {
2588: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2589: my @ar=@$parstack;
2590: for (my $i=$#ar-1;$i>=0;$i--) {
2591: if (lc($$tagstack[$i]) eq $good_tag) {
2592: &start_th_tex($parstack,$parser,$safeeval);
2593: last;
2594: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2595: splice @ar, $i+1;
2596: &end_th_tex(\@ar,$parser,$safeeval);
2597: &start_th_tex($parstack,$parser,$safeeval);
2598: last;
2599: }
2600: }
2601: return '';
2602: }
2603:
2604: sub start_th_tex {
2605: my ($parstack,$parser,$safeeval) = @_;
2606: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2607: if ($alignchar eq '') {
2608: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2609: }
2610: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2611: $Apache::londefdef::table[-1]{'counter_columns'}++;
2612: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2613: if (defined $TeXwidth) {
2614: my $current_length=&recalc($TeXwidth);
2615: $current_length=~/(\d+\.?\d*)/;
2616: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2617: }
2618: &Apache::lonxml::startredirection();
2619: return '';
2620: }
2621:
2622: sub end_th_tex {
2623: my ($parstack,$parser,$safeeval) = @_;
2624: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2625: my $data=&Apache::lonxml::endredirection();
2626: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2627: if (defined $TeXwidth) {
2628: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2629: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2630: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2631: } else {
2632: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2633: my $garbage_data=$data;
2634: my $fwidth=0;
2635: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2636: my $current_length=&recalc($1);
2637: $current_length=~/(\d+\.?\d*)/;
2638: if ($fwidth<$1) {$fwidth=$1;}
2639: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2640: }
2641: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2642: my $current_length=$1;
2643: if ($fwidth<$current_length) {$fwidth=$current_length;}
2644: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2645: }
2646: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2647: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2648: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2649: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2650: } else {
2651: $data=~s/^\s+(\S.*)/$1/;
2652: $data=~s/(.*\S)\s+$/$1/;
2653: $data=~s/(\s)+/$1/;
2654: my ($current_length,$min_length)=(0,0);
2655: if ($data=~/\\vskip/) {
2656: my $newdata=$data;
2657: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2658: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2659: foreach my $elementdata (@newdata) {
2660: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2661: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2662: my @words=split(/ /,$elementdata);
2663: foreach my $word (@words) {
2664: my $lengthword=2.5*&LATEX_length($word);
2665: if ($min_length<$lengthword) {$min_length=$lengthword;}
2666: }
2667: }
2668: } else {
2669: $current_length=2.5*&LATEX_length($data);
2670: my @words=split(/ /,$data);
2671: foreach my $word (@words) {
2672: my $lengthword=2*&LATEX_length($word);
2673: if ($min_length<$lengthword) {$min_length=$lengthword;}
2674: }
2675: }
2676: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2677: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2678: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2679: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2680: }
2681: }
2682: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2683: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2684: }
2685: #make data bold
2686: $data='\textbf{'.$data.'}';
2687: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2688: return'';
2689: }
2690:
2691: sub end_th {
2692: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2693: my $currentstring = &end_p(); # Close any open <p> in the row.
2694: if ($target eq 'web' || $target eq 'webgrade') {
2695: $currentstring .= $token->[2];
2696: } elsif ($target eq 'tex') {
2697: $Apache::londefdef::TD_redirection =0;
2698: &end_th_tex($parstack,$parser,$safeeval);
2699: }
2700: return $currentstring;
2701: }
2702:
2703: #-- <img> tag (end tag forbidden)
2704: #
2705: # Render the <IMG> tag.
2706: # <IMG> has the following attributes (in addition to the
2707: # standard HTML ones:
2708: # TeXwrap - Governs how the tex target will try to wrap text around
2709: # horizontally aligned images.
2710: # TeXwidth - The width of the image when rendered for print (mm).
2711: # TeXheight - The height of the image when rendered for print (mm)
2712: # (Note there seems to also be support for this as a % of page size)
2713: #
2714: sub start_img {
2715: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2716: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2717: undef,1);
2718: if (! $src &&
2719: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2720: ) {
2721: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2722: return '';
2723: }
2724: &Apache::lonxml::extlink($src);
2725: my $currentstring = '';
2726: my $scaling = .3;
2727:
2728: # Render unto browsers that which are the browser's...
2729:
2730: if ($target eq 'web' || $target eq 'webgrade') {
2731: if ($env{'browser.imagesuppress'} ne 'on') {
2732: my $enc = ('yes' eq
2733: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2734: $safeeval)));
2735: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2736: $enc);
2737: } else {
2738: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2739: undef,1);
2740: if (!$alttag) {
2741: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2742: $src);
2743: }
2744: $currentstring.='[IMAGE: '.$alttag.']';
2745: }
2746:
2747: # and render unto TeX that which is LaTeX
2748:
2749: } elsif ($target eq 'tex') {
2750: #
2751: # The alignment will require some superstructure to be put around
2752: # the \includegraphics stuff. At present we can only partially
2753: # simulate the alignments offered by html.
2754: #
2755: #
2756: my $align = lc(&Apache::lonxml::get_param('align',
2757: $parstack,
2758: $safeeval,
2759: undef,1));
2760: if(!$align) {
2761: $align = "bottom"; # This is html's default so it's ours too.
2762: }
2763: #
2764: &Apache::lonxml::debug("Alignemnt = $align");
2765: # LaTeX's image/text wrapping is really bad since it wants to
2766: # make figures float.
2767: # The user has the optional parameter (applicable only to l/r
2768: # alignment to use the picins/parpic directive to get wrapped text
2769: # this is also imperfect.. that's why we give them a choice...
2770: # so they can't yell at us for our choice.
2771: #
2772: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2773: $parstack,
2774: $safeeval,
2775: undef,0);
2776: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2777: if(!$latex_rendering) {
2778: $latex_rendering = "texwrap";
2779: }
2780: # using texwrap inside a table does not work. So, if after all of this,
2781: # texwrap is on, we turn it off if we detect we're in a table:
2782: #
2783: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2784: $latex_rendering = 'parpic';
2785: }
2786:
2787: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2788:
2789: #if original gif/jpg/png file exist do following:
2790: my $origsrc=$src;
2791: my ($path,$file) = &get_eps_image($src);
2792: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2793: &Apache::lonxml::debug("path = $path file = $file src = $src");
2794: if (-e $src) {
2795: &Apache::lonxml::debug("$src exists");
2796: my ($height_param,$width_param)=
2797: &image_size($origsrc,0.3,$parstack,$safeeval);
2798: my $destpath = $path;
2799: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2800: my $destfile = $file;
2801: $destfile =~ s/ /\_/g;
2802: my $size;
2803: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2804: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2805: $size='['.$size;
2806: $size=~s/,$/]/;
2807: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2808: .'\includegraphics'.$size.'{'.$destfile.'} ';
2809:
2810: # If there's an alignment specification we need to honor it here.
2811: # For the horizontal alignments, we will also honor the
2812: # value of the latex specfication. The default is parbox,
2813: # and that's used for illegal values too.
2814: #
2815: # Even though we set a default alignment value, the user
2816: # could have given us an illegal value. In that case we
2817: # just use the default alignment of bottom..
2818: if ($align eq "top") {
2819: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2820: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2821: my $offset = $height_param/2;
2822: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2823: } elsif ($align eq "left") {
2824: if ($latex_rendering eq "parpic") {
2825: $currentstring = '\parpic[l]{'.$currentstring.'}';
2826: } else { # wrapfig render
2827: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2828: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2829: }
2830: } elsif ($align eq "right") {
2831: if ($latex_rendering eq "parpic") {
2832: $currentstring = '\parpic[r]{'.$currentstring.'}';
2833: } else { # wrapfig rendering
2834: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2835: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2836:
2837: }
2838: } else { # Bottom is also default.
2839: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2840: }
2841: } else {
2842: &Apache::lonxml::debug("$src does not exist");
2843: #original image file doesn't exist so check the alt attribute
2844: my $alt =
2845: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2846: unless ($alt) {
2847: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2848: }
2849:
2850: if ($alt) { $currentstring .= ' '.$alt.' '; }
2851: }
2852:
2853: # And here's where the semi-quote breaks down: allow the user
2854: # to edit the beast as well by rendering the problem for edit:
2855: } elsif ($target eq 'edit') {
2856: $currentstring .=&Apache::edit::tag_start($target,$token);
2857: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2858: &Apache::edit::browse('src',undef,'alt').' '.
2859: &Apache::edit::search('src',undef,'alt').'<br />';
2860: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2861: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2862: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2863: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2864: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2865: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2866: ['','bottom','middle','top','left','right'],$token,5);
2867: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2868: ['', 'parbox', 'parpic'], $token, 2);
2869: $currentstring .=&Apache::edit::select_arg('Encyrpt URL:','encrypturl',
2870: ['no','yes'], $token, 2);
2871: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2872: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2873: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2874: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2875: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2876:
2877:
2878: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2879: if ($width) { $currentstring.=' width="'.$width.'" '; }
2880: if ($height) { $currentstring.=' height="'.$height.'" '; }
2881: $currentstring .= ' />';
2882: } elsif ($target eq 'modified') {
2883: my ($osrc,$owidth,$oheight)=
2884: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2885: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2886: $safeeval,'src','alt','align',
2887: 'TeXwidth','TeXheight', 'TeXwrap',
2888: 'width','height','encrypturl');
2889: my ($nsrc,$nwidth,$nheight)=
2890: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2891: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2892: &image_replication($loc);
2893: my ($iwidth,$iheight);
2894: if (-e $loc) {
2895: my $image = Image::Magick->new;
2896: $image->Read($loc);
2897: ($iwidth, $iheight) = ($image->Get('width'),
2898: $image->Get('height'));
2899: }
2900: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2901: # changed image or no size specified,
2902: # if they didn't explicitly change the
2903: # width or height use the ones from the image
2904: if ($iwidth && $iheight) {
2905: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2906: $token->[2]{'width'} = $iwidth;$ctag=1;
2907: }
2908: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2909: $token->[2]{'height'}=$iheight;$ctag=1;
2910: }
2911: }
2912: }
2913: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2914: # if we don't have a width or height
2915: if ($iwidth && $cwidth && !$cheight) {
2916: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2917: }
2918: if ($iheight && $cheight && !$cwidth) {
2919: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2920: }
2921: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2922: }
2923:
2924: return $currentstring;
2925: }
2926:
2927: sub end_img {
2928: my ($target,$token) = @_;
2929: my $currentstring = '';
2930: if ($target eq 'web' || $target eq 'webgrade') {
2931: $currentstring = $token->[2];
2932: } elsif ($target eq 'tex') {
2933: $currentstring = '';
2934: }
2935: return $currentstring;
2936: }
2937:
2938: #-- <applet> tag (end tag required)
2939: sub start_applet {
2940: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2941:
2942: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2943: &Apache::lonxml::extlink($code);
2944: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2945: undef,1);
2946: &Apache::lonxml::extlink($archive);
2947: my $currentstring = '';
2948: if ($target eq 'web' || $target eq 'webgrade') {
2949: if ($env{'browser.appletsuppress'} ne 'on') {
2950: $currentstring = &Apache::lonenc::encrypt_ref($token,
2951: {'code'=>$code,
2952: 'archive'=>$archive}
2953: );
2954: } else {
2955: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2956: $safeeval,undef,1);
2957: unless ($alttag) {
2958: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2959: $code);
2960: }
2961: $currentstring='[APPLET: '.$alttag.']';
2962: }
2963: } elsif ($target eq 'tex') {
2964: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2965: $safeeval,undef,1);
2966: unless ($alttag) {
2967: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2968: undef,1);
2969: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2970: $code);
2971: }
2972: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2973: '.}\end{center}';
2974: }
2975: return $currentstring;
2976: }
2977:
2978: sub end_applet {
2979: my ($target,$token) = @_;
2980: my $currentstring = '';
2981: if ($target eq 'web' || $target eq 'webgrade') {
2982: $currentstring = $token->[2];
2983: } elsif ($target eq 'tex') {
2984: }
2985: return $currentstring;
2986: }
2987:
2988: #-- <embed> tag (end tag optional/required)
2989: sub start_embed {
2990: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2991: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2992: &Apache::lonxml::extlink($src);
2993: my $currentstring = '';
2994: if ($target eq 'web' || $target eq 'webgrade') {
2995: if ($env{'browser.embedsuppress'} ne 'on') {
2996: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2997: } else {
2998: my $alttag=&Apache::lonxml::get_param
2999: ('alt',$parstack,$safeeval,undef,1);
3000: unless ($alttag) {
3001: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3002: }
3003: $currentstring='[EMBED: '.$alttag.']';
3004: }
3005: } elsif ($target eq 'tex') {
3006: }
3007: return $currentstring;
3008: }
3009:
3010: sub end_embed {
3011: my ($target,$token) = @_;
3012: my $currentstring = '';
3013: if ($target eq 'web' || $target eq 'webgrade') {
3014: $currentstring = $token->[2];
3015: } elsif ($target eq 'tex') {
3016: }
3017: return $currentstring;
3018: }
3019:
3020: #-- <param> tag (end tag forbidden)
3021: sub start_param {
3022: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3023: if (&Apache::lonxml::get_param('name',$parstack,
3024: $safeeval,undef,1)=~/^cabbase$/i) {
3025: my $value=&Apache::lonxml::get_param('value',$parstack,
3026: $safeeval,undef,1);
3027: &Apache::lonxml::extlink($value);
3028: }
3029:
3030: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3031: &Apache::lonxml::extlink($src);
3032: my $currentstring = '';
3033: if ($target eq 'web' || $target eq 'webgrade') {
3034: my %toconvert;
3035: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3036: if ($src) { $toconvert{'src'}= $src; }
3037: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3038: undef,1);
3039: if ($name=~/^cabbase$/i) {
3040: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3041: $safeeval,undef,1);
3042: }
3043: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3044: } elsif ($target eq 'tex') {
3045: }
3046: return $currentstring;
3047: }
3048:
3049: sub end_param {
3050: my ($target,$token) = @_;
3051: my $currentstring = '';
3052: if ($target eq 'web' || $target eq 'webgrade') {
3053: $currentstring = $token->[2];
3054: } elsif ($target eq 'tex') {
3055: }
3056: return $currentstring;
3057: }
3058:
3059: #-- <allow> tag
3060: sub start_allow {
3061: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3062: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3063: &Apache::lonxml::extlink($src);
3064:
3065: if ($target eq 'tex') { &image_replication($src); }
3066: my $result;
3067: if ($target eq 'edit') {
3068: $result .=&Apache::edit::tag_start($target,$token);
3069: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3070: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3071: } elsif ($target eq 'modified') {
3072: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3073: $safeeval,'src');
3074: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3075: }
3076: return $result;
3077: }
3078:
3079: sub end_allow {
3080: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3081: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3082: return '';
3083: }
3084:
3085: #-- Frames (end tag required)
3086: #-- <frameset>
3087: sub start_frameset {
3088: my ($target,$token) = @_;
3089: my $currentstring = ''; # Close any pending para.
3090: if ($target eq 'web' || $target eq 'webgrade') {
3091: if (!$Apache::lonxml::registered &&
3092: $env{'request.state'} eq 'published') {
3093: $currentstring.='<head>'.
3094: &Apache::lonmenu::registerurl(undef,$target).'</head>';
3095: }
3096: my $onLoad='';
3097: foreach my $key (keys(%{$token->[2]})) {
3098: if ($key =~ /^onload$/i) {
3099: $onLoad.=$token->[2]->{$key}.';';
3100: delete($token->[2]->{$key});
3101: }
3102: }
3103: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
3104: my $onUnload='';
3105: foreach my $key (keys(%{$token->[2]})) {
3106: if ($key =~ /^onunload$/i) {
3107: $onUnload.=$token->[2]->{$key}.';';
3108: delete($token->[2]->{$key});
3109: }
3110: }
3111: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
3112: ';'.$onUnload;
3113:
3114: $currentstring .= '<'.$token->[1];
3115: foreach (keys %{$token->[2]}) {
3116: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
3117: }
3118: $currentstring.='>';
3119: }
3120: return $currentstring;
3121: }
3122:
3123: sub end_frameset {
3124: my ($target,$token) = @_;
3125: my $currentstring = '';
3126: if ($target eq 'web' || $target eq 'webgrade') {
3127: $currentstring = $token->[2];
3128: }
3129: return $currentstring;
3130: }
3131:
3132: #-- <xmp> (end tag required)
3133: sub start_xmp {
3134: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3135: my $currentstring = '';
3136: if ($target eq 'web' || $target eq 'webgrade') {
3137: $currentstring .= $token->[4];
3138: } elsif ($target eq 'tex') {
3139: $currentstring .= '\begin{verbatim}';
3140: }
3141: return $currentstring;
3142: }
3143:
3144: sub end_xmp {
3145: my ($target,$token) = @_;
3146: my $currentstring = '';
3147: if ($target eq 'web' || $target eq 'webgrade') {
3148: $currentstring .= $token->[2];
3149: } elsif ($target eq 'tex') {
3150: $currentstring .= '\end{verbatim}';
3151: }
3152: return $currentstring;
3153: }
3154:
3155: #-- <pre> (end tag required)
3156: sub start_pre {
3157: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3158: my $currentstring = &end_p(); # close off pending <p>
3159: if ($target eq 'web' || $target eq 'webgrade') {
3160: $currentstring .= $token->[4];
3161: } elsif ($target eq 'tex') {
3162: $currentstring .= '\begin{verbatim}';
3163: &Apache::lonxml::disable_LaTeX_substitutions();
3164: }
3165: return $currentstring;
3166: }
3167:
3168: sub end_pre {
3169: my ($target,$token) = @_;
3170: my $currentstring = '';
3171: if ($target eq 'web' || $target eq 'webgrade') {
3172: $currentstring .= $token->[2];
3173: } elsif ($target eq 'tex') {
3174: $currentstring .= '\end{verbatim}';
3175: &Apache::lonxml::enable_LaTeX_substitutions();
3176: }
3177: return $currentstring;
3178: }
3179:
3180: #-- <insert>
3181: sub start_insert {
3182: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3183: my $currentstring = '';
3184: if ($target eq 'web' || $target eq 'webgrade') {
3185: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3186: $currentstring .= '<b>'.$display.'</b>';;
3187: }
3188: return $currentstring;
3189: }
3190:
3191: sub end_insert {
3192: my ($target,$token) = @_;
3193: my $currentstring = '';
3194: if ($target eq 'web' || $target eq 'webgrade') {
3195: $currentstring .= '';
3196: }
3197: return $currentstring;
3198: }
3199:
3200: #-- <externallink>
3201: sub start_externallink {
3202: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3203: my $currentstring = '';
3204: if ($target eq 'web' || $target eq 'webgrade') {
3205: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3206: $currentstring .= '<b>'.$display.'</b>';;
3207: }
3208: return $currentstring;
3209: }
3210:
3211: sub end_externallink {
3212: my ($target,$token) = @_;
3213: my $currentstring = '';
3214: if ($target eq 'web' || $target eq 'webgrade') {
3215: $currentstring .= '';
3216: }
3217: return $currentstring;
3218: }
3219:
3220: #-- <blankspace heigth="">
3221: sub start_blankspace {
3222: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3223: my $currentstring = &end_p(); # closes off any unclosed <p>
3224: if ($target eq 'tex') {
3225: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3226: $currentstring .= '\vskip '.$howmuch.' ';
3227: }
3228: return $currentstring;
3229: }
3230:
3231: sub end_blankspace {
3232: my ($target,$token) = @_;
3233: my $currentstring = '';
3234: if ($target eq 'tex') {
3235: $currentstring .= '';
3236: }
3237: return $currentstring;
3238: }
3239:
3240: #-- <abbr> tag (end tag required)
3241: sub start_abbr {
3242: my ($target,$token) = @_;
3243: my $currentstring = '';
3244: if ($target eq 'web' || $target eq 'webgrade') {
3245: $currentstring = $token->[4];
3246: }
3247: return $currentstring;
3248: }
3249:
3250: sub end_abbr {
3251: my ($target,$token) = @_;
3252: my $currentstring = '';
3253: if ($target eq 'web' || $target eq 'webgrade') {
3254: $currentstring = $token->[2];
3255: }
3256: return $currentstring;
3257: }
3258:
3259: #-- <acronym> tag (end tag required)
3260: sub start_acronym {
3261: my ($target,$token) = @_;
3262: my $currentstring = '';
3263: if ($target eq 'web' || $target eq 'webgrade') {
3264: $currentstring = $token->[4];
3265: }
3266: return $currentstring;
3267: }
3268:
3269: sub end_acronym {
3270: my ($target,$token) = @_;
3271: my $currentstring = '';
3272: if ($target eq 'web' || $target eq 'webgrade') {
3273: $currentstring = $token->[2];
3274: }
3275: return $currentstring;
3276: }
3277:
3278: #-- <area> tag (end tag forbidden)
3279: sub start_area {
3280: my ($target,$token) = @_;
3281: my $currentstring = '';
3282: if ($target eq 'web' || $target eq 'webgrade') {
3283: $currentstring = $token->[4];
3284: }
3285: return $currentstring;
3286: }
3287:
3288: sub end_area {
3289: my ($target,$token) = @_;
3290: my $currentstring = '';
3291: if ($target eq 'web' || $target eq 'webgrade') {
3292: $currentstring = $token->[2];
3293: }
3294: return $currentstring;
3295: }
3296:
3297: #-- <base> tag (end tag forbidden)
3298: sub start_base {
3299: my ($target,$token) = @_;
3300: my $currentstring = '';
3301: if ($target eq 'web' || $target eq 'webgrade') {
3302: $currentstring = $token->[4];
3303: }
3304: return $currentstring;
3305: }
3306:
3307: sub end_base {
3308: my ($target,$token) = @_;
3309: my $currentstring = '';
3310: if ($target eq 'web' || $target eq 'webgrade') {
3311: $currentstring = $token->[2];
3312: }
3313: return $currentstring;
3314: }
3315:
3316: #-- <bdo> tag (end tag required)
3317: sub start_bdo {
3318: my ($target,$token) = @_;
3319: my $currentstring = '';
3320: if ($target eq 'web' || $target eq 'webgrade') {
3321: $currentstring = $token->[4];
3322: }
3323: return $currentstring;
3324: }
3325:
3326: sub end_bdo {
3327: my ($target,$token) = @_;
3328: my $currentstring = '';
3329: if ($target eq 'web' || $target eq 'webgrade') {
3330: $currentstring = $token->[2];
3331: }
3332: return $currentstring;
3333: }
3334:
3335: #-- <bgsound> tag (end tag optional)
3336: sub start_bgsound {
3337: my ($target,$token) = @_;
3338: my $currentstring = '';
3339: if ($target eq 'web' || $target eq 'webgrade') {
3340: $currentstring = $token->[4];
3341: }
3342: return $currentstring;
3343: }
3344:
3345: sub end_bgsound {
3346: my ($target,$token) = @_;
3347: my $currentstring = '';
3348: if ($target eq 'web' || $target eq 'webgrade') {
3349: $currentstring = $token->[2];
3350: }
3351: return $currentstring;
3352: }
3353:
3354: #-- <blink> tag (end tag required)
3355: sub start_blink {
3356: my ($target,$token) = @_;
3357: my $currentstring = '';
3358: if ($target eq 'web' || $target eq 'webgrade') {
3359: $currentstring = $token->[4];
3360: }
3361: return $currentstring;
3362: }
3363:
3364: sub end_blink {
3365: my ($target,$token) = @_;
3366: my $currentstring = '';
3367: if ($target eq 'web' || $target eq 'webgrade') {
3368: $currentstring = $token->[2];
3369: }
3370: return $currentstring;
3371: }
3372:
3373: #-- <blockquote> tag (end tag required)
3374: sub start_blockquote {
3375: my ($target,$token) = @_;
3376: my $currentstring = &end_p(); # Close any unclosed <p>
3377: if ($target eq 'web' || $target eq 'webgrade') {
3378: $currentstring .= $token->[4];
3379: }
3380: return $currentstring;
3381: }
3382:
3383: sub end_blockquote {
3384: my ($target,$token) = @_;
3385: my $currentstring = '';
3386: if ($target eq 'web' || $target eq 'webgrade') {
3387: $currentstring = $token->[2];
3388: }
3389: return $currentstring;
3390: }
3391:
3392: #-- <button> tag (end tag required)
3393: sub start_button {
3394: my ($target,$token) = @_;
3395: my $currentstring = '';
3396: if ($target eq 'web' || $target eq 'webgrade') {
3397: $currentstring = $token->[4];
3398: }
3399: return $currentstring;
3400: }
3401:
3402: sub end_button {
3403: my ($target,$token) = @_;
3404: my $currentstring = '';
3405: if ($target eq 'web' || $target eq 'webgrade') {
3406: $currentstring = $token->[2];
3407: }
3408: return $currentstring;
3409: }
3410:
3411: #-- <caption> tag (end tag required)
3412: sub start_caption {
3413: my ($target,$token) = @_;
3414: my $currentstring = '';
3415: if ($target eq 'web' || $target eq 'webgrade') {
3416: $currentstring = $token->[4];
3417: }
3418: return $currentstring;
3419: }
3420:
3421: sub end_caption {
3422: my ($target,$token) = @_;
3423: my $currentstring = '';
3424: if ($target eq 'web' || $target eq 'webgrade') {
3425: $currentstring = $token->[2];
3426: }
3427: return $currentstring;
3428: }
3429:
3430: #-- <col> tag (end tag forbdden)
3431: sub start_col {
3432: my ($target,$token) = @_;
3433: my $currentstring = '';
3434: if ($target eq 'web' || $target eq 'webgrade') {
3435: $currentstring = $token->[4];
3436: }
3437: return $currentstring;
3438: }
3439:
3440: sub end_col {
3441: my ($target,$token) = @_;
3442: my $currentstring = '';
3443: if ($target eq 'web' || $target eq 'webgrade') {
3444: $currentstring = $token->[2];
3445: }
3446: return $currentstring;
3447: }
3448:
3449: #-- <colgroup> tag (end tag optional)
3450: sub start_colgroup {
3451: my ($target,$token) = @_;
3452: my $currentstring = '';
3453: if ($target eq 'web' || $target eq 'webgrade') {
3454: $currentstring = $token->[4];
3455: }
3456: return $currentstring;
3457: }
3458:
3459: sub end_colgroup {
3460: my ($target,$token) = @_;
3461: my $currentstring = '';
3462: if ($target eq 'web' || $target eq 'webgrade') {
3463: $currentstring = $token->[2];
3464: }
3465: return $currentstring;
3466: }
3467:
3468: #-- <del> tag (end tag required)
3469: sub start_del {
3470: my ($target,$token) = @_;
3471: my $currentstring = '';
3472: if ($target eq 'web' || $target eq 'webgrade') {
3473: $currentstring = $token->[4];
3474: }
3475: return $currentstring;
3476: }
3477:
3478: sub end_del {
3479: my ($target,$token) = @_;
3480: my $currentstring = '';
3481: if ($target eq 'web' || $target eq 'webgrade') {
3482: $currentstring = $token->[2];
3483: }
3484: return $currentstring;
3485: }
3486:
3487: #-- <fieldset> tag (end tag required)
3488: sub start_fieldset {
3489: my ($target,$token) = @_;
3490: my $currentstring = '';
3491: if ($target eq 'web' || $target eq 'webgrade') {
3492: $currentstring = $token->[4];
3493: }
3494: return $currentstring;
3495: }
3496:
3497: sub end_fieldset {
3498: my ($target,$token) = @_;
3499: my $currentstring = '';
3500: if ($target eq 'web' || $target eq 'webgrade') {
3501: $currentstring = $token->[2];
3502: }
3503: return $currentstring;
3504: }
3505:
3506: #-- <frame> tag (end tag forbidden)
3507: sub start_frame {
3508: my ($target,$token) = @_;
3509: my $currentstring = '';
3510: if ($target eq 'web' || $target eq 'webgrade') {
3511: $currentstring = $token->[4];
3512: }
3513: return $currentstring;
3514: }
3515:
3516: sub end_frame {
3517: my ($target,$token) = @_;
3518: my $currentstring = '';
3519: if ($target eq 'web' || $target eq 'webgrade') {
3520: $currentstring = $token->[2];
3521: }
3522: return $currentstring;
3523: }
3524:
3525: #-- <iframe> tag (end tag required)
3526: sub start_iframe {
3527: my ($target,$token) = @_;
3528: my $currentstring = '';
3529: if ($target eq 'web' || $target eq 'webgrade') {
3530: $currentstring = $token->[4];
3531: }
3532: return $currentstring;
3533: }
3534:
3535: sub end_iframe {
3536: my ($target,$token) = @_;
3537: my $currentstring = '';
3538: if ($target eq 'web' || $target eq 'webgrade') {
3539: $currentstring = $token->[2];
3540: }
3541: return $currentstring;
3542: }
3543:
3544: #-- <ins> tag (end tag required)
3545: sub start_ins {
3546: my ($target,$token) = @_;
3547: my $currentstring = '';
3548: if ($target eq 'web' || $target eq 'webgrade') {
3549: $currentstring = $token->[4];
3550: }
3551: return $currentstring;
3552: }
3553:
3554: sub end_ins {
3555: my ($target,$token) = @_;
3556: my $currentstring = '';
3557: if ($target eq 'web' || $target eq 'webgrade') {
3558: $currentstring = $token->[2];
3559: }
3560: return $currentstring;
3561: }
3562:
3563: #-- <isindex> tag (end tag forbidden)
3564: sub start_isindex {
3565: my ($target,$token) = @_;
3566: my $currentstring = '';
3567: if ($target eq 'web' || $target eq 'webgrade') {
3568: $currentstring = $token->[4];
3569: }
3570: return $currentstring;
3571: }
3572:
3573: sub end_isindex {
3574: my ($target,$token) = @_;
3575: my $currentstring = '';
3576: if ($target eq 'web' || $target eq 'webgrade') {
3577: $currentstring = $token->[2];
3578: }
3579: return $currentstring;
3580: }
3581:
3582: #-- <keygen> tag (end tag forbidden)
3583: sub start_keygen {
3584: my ($target,$token) = @_;
3585: my $currentstring = '';
3586: if ($target eq 'web' || $target eq 'webgrade') {
3587: $currentstring = $token->[4];
3588: }
3589: return $currentstring;
3590: }
3591:
3592: sub end_keygen {
3593: my ($target,$token) = @_;
3594: my $currentstring = '';
3595: if ($target eq 'web' || $target eq 'webgrade') {
3596: $currentstring = $token->[2];
3597: }
3598: return $currentstring;
3599: }
3600:
3601: #-- <label> tag
3602: sub start_label {
3603: my ($target,$token) = @_;
3604: my $currentstring = '';
3605: if ($target eq 'web' || $target eq 'webgrade') {
3606: $currentstring = $token->[4];
3607: }
3608: return $currentstring;
3609: }
3610:
3611: sub end_label {
3612: my ($target,$token) = @_;
3613: my $currentstring = '';
3614: if ($target eq 'web' || $target eq 'webgrade') {
3615: $currentstring = $token->[2];
3616: }
3617: return $currentstring;
3618: }
3619:
3620: #-- <layer> tag (end tag required)
3621: sub start_layer {
3622: my ($target,$token) = @_;
3623: my $currentstring = '';
3624: if ($target eq 'web' || $target eq 'webgrade') {
3625: $currentstring = $token->[4];
3626: }
3627: return $currentstring;
3628: }
3629:
3630: sub end_layer {
3631: my ($target,$token) = @_;
3632: my $currentstring = '';
3633: if ($target eq 'web' || $target eq 'webgrade') {
3634: $currentstring = $token->[2];
3635: }
3636: return $currentstring;
3637: }
3638:
3639: #-- <legend> tag (end tag required)
3640: sub start_legend {
3641: my ($target,$token) = @_;
3642: my $currentstring = '';
3643: if ($target eq 'web' || $target eq 'webgrade') {
3644: $currentstring = $token->[4];
3645: }
3646: return $currentstring;
3647: }
3648:
3649: sub end_legend {
3650: my ($target,$token) = @_;
3651: my $currentstring = '';
3652: if ($target eq 'web' || $target eq 'webgrade') {
3653: $currentstring = $token->[2];
3654: }
3655: return $currentstring;
3656: }
3657:
3658: #-- <link> tag (end tag forbidden)
3659: sub start_link {
3660: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3661: my $currentstring = '';
3662: if ($target eq 'web' || $target eq 'webgrade') {
3663: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3664: undef,1);
3665: &Apache::lonxml::extlink($href);
3666: $currentstring = $token->[4];
3667: }
3668: return $currentstring;
3669: }
3670:
3671: sub end_link {
3672: my ($target,$token) = @_;
3673: my $currentstring = '';
3674: if ($target eq 'web' || $target eq 'webgrade') {
3675: $currentstring = $token->[2];
3676: }
3677: return $currentstring;
3678: }
3679:
3680: #-- <marquee> tag (end tag optional)
3681: sub start_marquee {
3682: my ($target,$token) = @_;
3683: my $currentstring = '';
3684: if ($target eq 'web' || $target eq 'webgrade') {
3685: $currentstring = $token->[4];
3686: }
3687: return $currentstring;
3688: }
3689:
3690: sub end_marquee {
3691: my ($target,$token) = @_;
3692: my $currentstring = '';
3693: if ($target eq 'web' || $target eq 'webgrade') {
3694: $currentstring = $token->[2];
3695: }
3696: return $currentstring;
3697: }
3698:
3699: #-- <multicol> tag (end tag required)
3700: sub start_multicol {
3701: my ($target,$token) = @_;
3702: my $currentstring = &end_p(); # Close any pending <p>
3703: if ($target eq 'web' || $target eq 'webgrade') {
3704: $currentstring .= $token->[4];
3705: }
3706: return $currentstring;
3707: }
3708:
3709: sub end_multicol {
3710: my ($target,$token) = @_;
3711: my $currentstring = '';
3712: if ($target eq 'web' || $target eq 'webgrade') {
3713: $currentstring = $token->[2];
3714: }
3715: return $currentstring;
3716: }
3717:
3718: #-- <nobr> tag (end tag required)
3719: sub start_nobr {
3720: my ($target,$token) = @_;
3721: my $currentstring = '';
3722: if ($target eq 'web' || $target eq 'webgrade') {
3723: $currentstring = $token->[4];
3724: } elsif ($target eq 'tex') {
3725: $currentstring='\mbox{';
3726: }
3727: return $currentstring;
3728: }
3729:
3730: sub end_nobr {
3731: my ($target,$token) = @_;
3732: my $currentstring = '';
3733: if ($target eq 'web' || $target eq 'webgrade') {
3734: $currentstring = $token->[2];
3735: } elsif ($target eq 'tex') {
3736: $currentstring='}';
3737: }
3738: return $currentstring;
3739: }
3740:
3741: #-- <noembed> tag (end tag required)
3742: sub start_noembed {
3743: my ($target,$token) = @_;
3744: my $currentstring = '';
3745: if ($target eq 'web' || $target eq 'webgrade') {
3746: $currentstring = $token->[4];
3747: }
3748: return $currentstring;
3749: }
3750:
3751: sub end_noembed {
3752: my ($target,$token) = @_;
3753: my $currentstring = '';
3754: if ($target eq 'web' || $target eq 'webgrade') {
3755: $currentstring = $token->[2];
3756: }
3757: return $currentstring;
3758: }
3759:
3760: #-- <noframes> tag (end tag required)
3761: sub start_noframes {
3762: my ($target,$token) = @_;
3763: my $currentstring = '';
3764: if ($target eq 'web' || $target eq 'webgrade') {
3765: $currentstring = $token->[4];
3766: }
3767: return $currentstring;
3768: }
3769:
3770: sub end_noframes {
3771: my ($target,$token) = @_;
3772: my $currentstring = '';
3773: if ($target eq 'web' || $target eq 'webgrade') {
3774: $currentstring = $token->[2];
3775: }
3776: return $currentstring;
3777: }
3778:
3779: #-- <nolayer> tag (end tag required)
3780: sub start_nolayer {
3781: my ($target,$token) = @_;
3782: my $currentstring = '';
3783: if ($target eq 'web' || $target eq 'webgrade') {
3784: $currentstring = $token->[4];
3785: }
3786: return $currentstring;
3787: }
3788:
3789: sub end_nolayer {
3790: my ($target,$token) = @_;
3791: my $currentstring = '';
3792: if ($target eq 'web' || $target eq 'webgrade') {
3793: $currentstring = $token->[2];
3794: }
3795: return $currentstring;
3796: }
3797:
3798: #-- <noscript> tag (end tag required)
3799: sub start_noscript {
3800: my ($target,$token) = @_;
3801: my $currentstring = '';
3802: if ($target eq 'web' || $target eq 'webgrade') {
3803: $currentstring = $token->[4];
3804: }
3805: return $currentstring;
3806: }
3807:
3808: sub end_noscript {
3809: my ($target,$token) = @_;
3810: my $currentstring = '';
3811: if ($target eq 'web' || $target eq 'webgrade') {
3812: $currentstring = $token->[2];
3813: }
3814: return $currentstring;
3815: }
3816:
3817: #-- <object> tag (end tag required)
3818: sub start_object {
3819: my ($target,$token) = @_;
3820: my $currentstring = '';
3821: if ($target eq 'web' || $target eq 'webgrade') {
3822: $currentstring = $token->[4];
3823: }
3824: return $currentstring;
3825: }
3826:
3827: sub end_object {
3828: my ($target,$token) = @_;
3829: my $currentstring = '';
3830: if ($target eq 'web' || $target eq 'webgrade') {
3831: $currentstring = $token->[2];
3832: }
3833: return $currentstring;
3834: }
3835:
3836: #-- <optgroup> tag (end tag required)
3837: sub start_optgroup {
3838: my ($target,$token) = @_;
3839: my $currentstring = '';
3840: if ($target eq 'web' || $target eq 'webgrade') {
3841: $currentstring = $token->[4];
3842: }
3843: return $currentstring;
3844: }
3845:
3846: sub end_optgroup {
3847: my ($target,$token) = @_;
3848: my $currentstring = '';
3849: if ($target eq 'web' || $target eq 'webgrade') {
3850: $currentstring = $token->[2];
3851: }
3852: return $currentstring;
3853: }
3854:
3855: #-- <samp> tag (end tag required)
3856: sub start_samp {
3857: my ($target,$token) = @_;
3858: my $currentstring = '';
3859: if ($target eq 'web' || $target eq 'webgrade') {
3860: $currentstring = $token->[4];
3861: } elsif ($target eq 'tex') {
3862: $currentstring='\texttt{';
3863: }
3864: return $currentstring;
3865: }
3866:
3867: sub end_samp {
3868: my ($target,$token) = @_;
3869: my $currentstring = '';
3870: if ($target eq 'web' || $target eq 'webgrade') {
3871: $currentstring = $token->[2];
3872: } elsif ($target eq 'tex') {
3873: $currentstring='}';
3874: }
3875: return $currentstring;
3876: }
3877:
3878: #-- <server> tag
3879: sub start_server {
3880: my ($target,$token) = @_;
3881: my $currentstring = '';
3882: if ($target eq 'web' || $target eq 'webgrade') {
3883: $currentstring = $token->[4];
3884: }
3885: return $currentstring;
3886: }
3887:
3888: sub end_server {
3889: my ($target,$token) = @_;
3890: my $currentstring = '';
3891: if ($target eq 'web' || $target eq 'webgrade') {
3892: $currentstring = $token->[2];
3893: }
3894: return $currentstring;
3895: }
3896:
3897: #-- <spacer> tag (end tag forbidden)
3898: sub start_spacer {
3899: my ($target,$token) = @_;
3900: my $currentstring = &end_p(); # Close off any open <p> tag.
3901: if ($target eq 'web' || $target eq 'webgrade') {
3902: $currentstring .= $token->[4];
3903: }
3904: return $currentstring;
3905: }
3906:
3907: sub end_spacer {
3908: my ($target,$token) = @_;
3909: my $currentstring = '';
3910: if ($target eq 'web' || $target eq 'webgrade') {
3911: $currentstring = $token->[2];
3912: }
3913: return $currentstring;
3914: }
3915:
3916: #-- <span> tag (end tag required)
3917: sub start_span {
3918: my ($target,$token) = @_;
3919: my $currentstring = '';
3920: if ($target eq 'web' || $target eq 'webgrade') {
3921: $currentstring = $token->[4];
3922: }
3923: return $currentstring;
3924: }
3925:
3926: sub end_span {
3927: my ($target,$token) = @_;
3928: my $currentstring = '';
3929: if ($target eq 'web' || $target eq 'webgrade') {
3930: $currentstring = $token->[2];
3931: }
3932: return $currentstring;
3933: }
3934:
3935: #-- <tbody> tag (end tag optional)
3936: sub start_tbody {
3937: my ($target,$token) = @_;
3938: my $currentstring = '';
3939: if ($target eq 'web' || $target eq 'webgrade') {
3940: $currentstring = $token->[4];
3941: }
3942: return $currentstring;
3943: }
3944:
3945: sub end_tbody {
3946: my ($target,$token) = @_;
3947: my $currentstring = '';
3948: if ($target eq 'web' || $target eq 'webgrade') {
3949: $currentstring = $token->[2];
3950: }
3951: return $currentstring;
3952: }
3953:
3954: #-- <tfoot> tag (end tag optional)
3955: sub start_tfoot {
3956: my ($target,$token) = @_;
3957: my $currentstring = '';
3958: if ($target eq 'web' || $target eq 'webgrade') {
3959: $currentstring = $token->[4];
3960: }
3961: return $currentstring;
3962: }
3963:
3964: sub end_tfoot {
3965: my ($target,$token) = @_;
3966: my $currentstring = '';
3967: if ($target eq 'web' || $target eq 'webgrade') {
3968: $currentstring = $token->[2];
3969: }
3970: return $currentstring;
3971: }
3972:
3973: #-- <thead> tag (end tag optional)
3974: sub start_thead {
3975: my ($target,$token) = @_;
3976: my $currentstring = '';
3977: if ($target eq 'web' || $target eq 'webgrade') {
3978: $currentstring = $token->[4];
3979: }
3980: return $currentstring;
3981: }
3982:
3983: sub end_thead {
3984: my ($target,$token) = @_;
3985: my $currentstring = '';
3986: if ($target eq 'web' || $target eq 'webgrade') {
3987: $currentstring = $token->[2];
3988: }
3989: return $currentstring;
3990: }
3991:
3992: #-- <var> tag
3993: sub start_var {
3994: my ($target,$token) = @_;
3995: my $currentstring = '';
3996: if ($target eq 'web' || $target eq 'webgrade') {
3997: $currentstring = $token->[4];
3998: } elsif ($target eq 'tex') {
3999: $currentstring = '\textit{';
4000: }
4001: return $currentstring;
4002: }
4003:
4004: sub end_var {
4005: my ($target,$token) = @_;
4006: my $currentstring = '';
4007: if ($target eq 'web' || $target eq 'webgrade') {
4008: $currentstring = $token->[2];
4009: } elsif ($target eq 'tex') {
4010: $currentstring = '}';
4011: }
4012: return $currentstring;
4013: }
4014:
4015: #-- <wbr> tag (end tag forbidden)
4016: sub start_wbr {
4017: my ($target,$token) = @_;
4018: my $currentstring = '';
4019: if ($target eq 'web' || $target eq 'webgrade') {
4020: $currentstring = $token->[4];
4021: }
4022: return $currentstring;
4023: }
4024:
4025: sub end_wbr {
4026: my ($target,$token) = @_;
4027: my $currentstring = '';
4028: if ($target eq 'web' || $target eq 'webgrade') {
4029: $currentstring = $token->[2];
4030: }
4031: return $currentstring;
4032: }
4033:
4034: #-- <hideweboutput> tag
4035: sub start_hideweboutput {
4036: my ($target,$token) = @_;
4037: if ($target eq 'web' || $target eq 'webgrade') {
4038: &Apache::lonxml::startredirection();
4039: }
4040: return '';
4041: }
4042:
4043: sub end_hideweboutput {
4044: my ($target,$token) = @_;
4045: my $currentstring = '';
4046: if ($target eq 'web' || $target eq 'webgrade') {
4047: $currentstring = &Apache::lonxml::endredirection();
4048: }
4049: return '';
4050: }
4051:
4052:
4053: sub image_replication {
4054: my $src = shift;
4055: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4056: #replicates eps or ps
4057: my $epssrc = my $pssrc = $src;
4058: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4059: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4060: if (not -e $epssrc && not -e $pssrc) {
4061: my $result=&Apache::lonnet::repcopy($epssrc);
4062: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4063: }
4064: return '';
4065: }
4066: #
4067: # Get correct sizing parameter for an image given
4068: # it's initial ht. and wid. This allows sizing of
4069: # images that are generated on-the-fly (e.g. gnuplot)
4070: # as well as serving as a utility for image_size.
4071: #
4072: # Parameter:
4073: # height_param
4074: # width_param - Initial picture dimensions.
4075: # scaling - A scale factor.
4076: # parstack, - the current stack of tag attributes
4077: # from the xml parser
4078: # safeeval, - pointer to the safespace
4079: # depth, - from what level in the stack to look for attributes
4080: # (assumes -1 if unspecified)
4081: # cis - look for attrubutes case insensitively
4082: # (assumes false)
4083: #
4084: # Returns:
4085: # height, width - new dimensions.
4086: #
4087: sub resize_image {
4088: my ($height_param, $width_param, $scaling,
4089: $parstack, $safeeval, $depth, $cis) = @_;
4090:
4091: # First apply the scaling...
4092:
4093: $height_param = $height_param * $scaling;
4094: $width_param = $width_param * $scaling;
4095:
4096: #do we have any specified LaTeX size of the picture?
4097: my $toget='TeXwidth';
4098: if ($cis) {
4099: $toget=lc($toget);
4100: }
4101: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4102: $safeeval,$depth,$cis);
4103: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4104: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4105: $safeeval,$depth,$cis);
4106: #do we have any specified web size of the picture?
4107: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4108: $depth,1);
4109: if ($TeXwidth) {
4110: my $old_width_param=$width_param;
4111: if ($TeXwidth=~/(\d+)\s*\%/) {
4112: $width_param = $1*$env{'form.textwidth'}/100;
4113: } else {
4114: $width_param = $TeXwidth;
4115: }
4116: if ($TeXheight) {
4117: $height_param = $TeXheight;
4118: } elsif ($old_width_param) {
4119: $height_param=$TeXwidth/$old_width_param*$height_param;
4120: }
4121: } elsif ($TeXheight) {
4122: $height_param = $TeXheight;
4123: if ($height_param) {
4124: $width_param = $TeXheight/$height_param*$width_param;
4125: }
4126: } elsif ($width) {
4127: my $old_width_param=$width_param;
4128: $width_param = $width*$scaling;
4129: if ($old_width_param) {
4130: $height_param=$width_param/$old_width_param*$height_param;
4131: }
4132: }
4133: if ($width_param > $env{'form.textwidth'}) {
4134: my $old_width_param=$width_param;
4135: $width_param =0.95*$env{'form.textwidth'};
4136: if ($old_width_param) {
4137: $height_param=$width_param/$old_width_param*$height_param;
4138: }
4139: }
4140:
4141: return ($height_param, $width_param);
4142: }
4143:
4144: sub image_size {
4145: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4146:
4147: #size of image from gif/jpg/jpeg/png
4148: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4149: if (-e $ressrc) {
4150: $src = $ressrc;
4151: }
4152: my $image = Image::Magick->new;
4153: my $current_figure = $image->Read($src);
4154: my $width_param = $image->Get('width');
4155: my $height_param = $image->Get('height');
4156: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4157: undef($image);
4158:
4159: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4160: $scaling, $parstack, $safeeval,
4161: $depth, $cis);
4162:
4163: return ($height_param, $width_param);
4164: }
4165:
4166: sub image_width {
4167: my ($height, $width) = &image_size(@_);
4168: return $width;
4169: }
4170: # Not yet 100% sure this is correct in all circumstances..
4171: # due to my uncertainty about mods to image_size.
4172: #
4173: sub image_height {
4174: my ($height, $width) = &image_size(@_);
4175: return $height;
4176: }
4177:
4178: sub get_eps_image {
4179: my ($src)=@_;
4180: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4181:
4182: # In order to prevent the substitution of the alt text, we need to
4183: # be sure the orig_src file is on system now so:
4184:
4185: if (! -e $orig_src) {
4186: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4187: }
4188: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4189: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4190: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4191: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4192: &Apache::lonxml::debug("Filelocation gives: $src");
4193: if (! -e $src) {
4194: &Apache::lonxml::debug("$src does not exist");
4195: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4196: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4197: #if replication failed try to find ps file
4198: $src=~s/\.eps$/\.ps/;
4199: &Apache::lonxml::debug("Now looking for $src");
4200: #if no ps file try to replicate it.
4201: my $didrepcopy = &Apache::lonnet::repcopy($src);
4202: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4203: if ( (not -e $src) ||
4204: ($didrepcopy ne 'ok')) {
4205: &Apache::lonxml::debug("Failed to find or replicate $src");
4206:
4207: #if replication failed try to produce eps file dynamically
4208: $src=~s/\.ps$/\.eps/;
4209: my $temp_file;
4210: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4211: my $newsrc=$orig_src;
4212: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4213: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4214: print FILE "$newsrc\n";
4215: close FILE;
4216: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4217: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4218: if ($sext ne "") { # Put the ext. back in to uniquify.
4219: $src =~ s/\.eps$/$sext.eps/;
4220: }
4221: }
4222: }
4223: }
4224: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4225: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4226: return ($path.'/',$file);
4227: }
4228:
4229: sub eps_generation {
4230: my ($src,$file,$width_param) = @_;
4231: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4232: my $temp_file = Apache::File->new('>>'.$filename);
4233: print $temp_file "$src\n";
4234: my $newsrc = $src;
4235: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4236: $newsrc=~s/\/home\/httpd\/html\/res//;
4237: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4238: $newsrc=~s/\/\.\//\//;
4239: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4240: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4241: $newsrc=~s/\/home\/httpd\/lonUsers//;
4242: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4243: }
4244: if ($newsrc=~/\/userfiles\//) {
4245: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4246: } else {
4247: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4248: }
4249: }
4250:
4251: sub file_path {
4252: my $src=shift;
4253: my ($file,$path);
4254: if ($src =~ m!(.*)/([^/]*)$!) {
4255: $file = $2;
4256: $path = $1.'/';
4257: }
4258: return $file,$path;
4259: }
4260: # Converts a measurement in to mm from any of
4261: # the other valid LaTeX units of measure.
4262: # If the units of measure are missing from the
4263: # parameter, it is assumed to be in and returned
4264: # with mm units of measure
4265: sub recalc {
4266: my $argument = shift;
4267: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4268: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4269: my $value=$1;
4270: my $units=$2;
4271: if ($units eq 'cm') {
4272: $value*=10;
4273: } elsif ($units eq 'in') {
4274: $value*=25.4;
4275: } elsif ($units eq 'pc') {
4276: $value*=(25.4*12/72.27);
4277: } elsif ($units eq 'pt') {
4278: $value*=(25.4/72.27);
4279: }
4280: return $value.' mm';
4281: }
4282:
4283: sub LATEX_length {
4284: my $garbage=shift;
4285: $garbage=~s/^\s+$//;
4286: $garbage=~s/^\s+(\S.*)/$1/;#space before
4287: $garbage=~s/(.*\S)\s+$/$1/;#space after
4288: $garbage=~s/(\s)+/$1/;#only one space
4289: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4290: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4291: $garbage=~s/([^\\])\$/$1/g;#$
4292: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4293: $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;
4294: $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;
4295: $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;
4296: $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;
4297: $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;
4298: $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;
4299: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4300: #remove some other LaTeX command
4301: $garbage=~s|\\(\w+)\\|\\|g;
4302: $garbage=~s|\\(\w+)(\s*)|$2|g;
4303: $garbage=~s|\+|11|g;
4304: my $value=length($garbage);
4305: return $value;
4306: }
4307:
4308:
4309: # is_inside_of $tagstack $tag
4310: # This sub returns true if the current state of Xml processing
4311: # is inside of the tag.
4312: # Parameters:
4313: # tagstack - The tagstack from the parser.
4314: # tag - The tag (without the <>'s.).
4315: # Sample usage:
4316: # if (is_inside_of($tagstack "table")) {
4317: # # I'm in a table....
4318: # }
4319: sub is_inside_of {
4320: my ($tagstack, $tag) = @_;
4321: my @stack = @$tagstack;
4322: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4323: if ($stack[$i] eq $tag) {
4324: return 1;
4325: }
4326: }
4327: return 0;
4328: }
4329:
4330:
4331: 1;
4332: __END__
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