1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.336 2006/09/05 21:57:57 foxr Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: # use Data::Dumper;
52:
53: BEGIN {
54:
55: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
56:
57: }
58:
59: #
60: # Dumps all elements of the table structure.
61: # Need this 'cause evidently when given an array, Data::Dumper only seems
62: # to dump element 0.
63: #
64: #sub debug_dump_table {
65: # my $lastrow = $#Apache::londefdef::table;
66: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
67: # my $row;
68: # for ($row =0; $row <= $lastrow; $row++ ) {
69: # my $text = Dumper($Apache::londefdef::table[$row]);
70: # &Apache::lonnet::logthis("table [ $row ]".$text);
71: # }
72: #}
73: sub initialize_londefdef {
74: $Apache::londefdef::TD_redirection=0;
75: @Apache::londefdef::table = ();
76: $Apache::londefdef::select=0;
77: undef(@Apache::londefdef::description);
78: @Apache::londefdef::DD=(0);
79: @Apache::londefdef::DT=(0);
80: @Apache::londefdef::seenDT=(0);
81: $Apache::londefdef::list_index=0;
82: undef($Apache::londefdef::head);
83: undef($Apache::londefdef::title);
84: }
85:
86: #======================= TAG SUBROUTINES =====================
87: #-- <output>
88: sub start_output {
89: my ($target) = @_;
90: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
91: return '';
92: }
93: sub end_output {
94: my ($target) = @_;
95: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
96: return '';
97: }
98: #-- <m> tag
99: sub start_m {
100: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
101: my $currentstring = '';
102: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
103: if ($target eq 'web' || $target eq 'analyze') {
104: &Apache::lonxml::debug("M is starting with:$inside:");
105: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
106: if ($eval eq 'on') {
107: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
108: #&Apache::lonxml::debug("M is evaulated to:$inside:");
109: }
110: my $tex = $inside;
111: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
112: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
113: if ($Apache::lontexconvert::errorstring) {
114: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
115: $tex = &HTML::Entities::encode($tex,'<>&"');
116: my ($linenumber) =
117: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
118: if (defined($linenumber)) {
119: my @tex=split("\n",$tex);
120: $tex[$linenumber]='<b><font color="red">'.
121: $tex[$linenumber].'</font></b>';
122: $tex=join("\n",@tex);
123: }
124: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
125: $Apache::lontexconvert::errorstring='';
126: }
127: #&Apache::lonxml::debug("M is ends with:$currentstring:");
128: $Apache::lonxml::post_evaluate=0;
129: } elsif ($target eq 'tex') {
130: $currentstring = $inside;
131: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
132: if ($eval eq 'on') {
133: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
134: }
135: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
136: # detect simple math mode entry exits, and convert them
137: # to use \ensuremath
138: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
139: $currentstring=~s/^(\s*)\$/$1/;
140: $currentstring=~s/\$(\s*)$/$1/;
141: $currentstring='\ensuremath{'.$currentstring.'}';
142: }
143: $Apache::lonxml::post_evaluate=0;
144: }
145: return $currentstring;
146: }
147:
148: sub end_m {
149: my ($target,$token) = @_;
150: my $currentstring = '';
151: if ($target eq 'tex') {
152: $currentstring = "";
153: }
154: return $currentstring;
155: }
156:
157: sub start_tthoption {
158: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
159: my $result;
160: if ($target eq 'web' || $target eq 'webgrade') {
161: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
162: $style);
163: $inside=~s/^\s*//;
164: if ($env{'browser.mathml'}) {
165: &tth::ttmoptions($inside);
166: } else {
167: &tth::tthoptions($inside);
168: }
169: }
170: return $result;
171: }
172:
173: sub end_tthoption {
174: my ($target,$token) = @_;
175: my $result;
176: return $result;
177: }
178:
179: #-- <html> tag (end tag optional)
180: sub start_html {
181: my ($target,$token) = @_;
182: my $currentstring = '';
183: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
184: # start_body() takes care of emitting the <html>
185: } elsif ($target eq 'tex') {
186: $currentstring .=
187: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
188: if (($env{'form.latex_type'}=~'batchmode') ||
189: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
190: $currentstring .= '\newcommand{\keephidden}[1]{}'.
191: '\renewcommand{\deg}{$^{\circ}$}'.
192: '\usepackage{multirow}'.
193: '\usepackage{longtable}'.
194: '\usepackage{textcomp}'.
195: '\usepackage{makeidx}'.
196: '\usepackage[dvips]{graphicx}'.
197: '\usepackage{wrapfig}'.
198: '\usepackage{picins}'.
199: '\usepackage{epsfig}'.
200: '\usepackage{calc}'.
201: '\usepackage{amsmath}'.
202: '\usepackage{amssymb}'.
203: '\usepackage{amsfonts}'.
204: '\usepackage{amsthm}'.
205: '\usepackage{amscd}'.
206: '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'.
207: '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}';
208: }
209: return $currentstring;
210: }
211:
212: sub end_html {
213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
214: my $currentstring = '';
215: if ($target eq 'web' || $target eq 'webgrade') {
216: # end_body takes care of the </html>
217: }
218: return $currentstring;
219: }
220:
221: #-- <head> tag (end tag optional)
222: sub start_head {
223: my ($target,$token) = @_;
224: my $currentstring = '';
225: if ($target eq 'web' || $target eq 'webgrade') {
226: &Apache::lonxml::startredirection();
227: }
228: return $currentstring;
229: }
230:
231: sub end_head {
232: my ($target,$token) = @_;
233: my $currentstring = '';
234: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
235: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
236: # in case there is a </head> but no <head>
237: if ($Apache::lonxml::redirection) {
238: $Apache::londefdef::head = &Apache::lonxml::endredirection();
239: }
240: }
241: return $currentstring;
242: }
243:
244: #-- <map> tag (end tag required)
245: sub start_map {
246: my ($target,$token) = @_;
247: my $currentstring = '';
248: if ($target eq 'web' || $target eq 'webgrade') {
249: $currentstring = $token->[4];
250: }
251: return $currentstring;
252: }
253:
254: sub end_map {
255: my ($target,$token) = @_;
256: my $currentstring = '';
257: if ($target eq 'web' || $target eq 'webgrade') {
258: $currentstring = $token->[2];
259: }
260: return $currentstring;
261: }
262:
263: #-- <select> tag (end tag required)
264: sub start_select {
265: my ($target,$token) = @_;
266: my $currentstring = '';
267: if ($target eq 'web' || $target eq 'webgrade') {
268: $currentstring = $token->[4];
269: } elsif ($target eq 'tex') {
270: $Apache::londefdef::select=0;
271: }
272: return $currentstring;
273: }
274:
275: sub end_select {
276: my ($target,$token) = @_;
277: my $currentstring = '';
278: if ($target eq 'web' || $target eq 'webgrade') {
279: $currentstring = $token->[2];
280: }
281: return $currentstring;
282: }
283:
284: #-- <option> tag (end tag optional)
285: sub start_option {
286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
287: my $currentstring = '';
288: if ($target eq 'web' || $target eq 'webgrade') {
289: $currentstring = $token->[4];
290: } elsif ($target eq 'tex') {
291: $Apache::londefdef::select++;
292: if ($Apache::londefdef::select == 1) {
293: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
294: } else {
295: $currentstring='\keephidden{';
296: }
297: }
298: return $currentstring;
299: }
300:
301: sub end_option {
302: my ($target,$token) = @_;
303: my $currentstring = '';
304: if ($target eq 'web' || $target eq 'webgrade') {
305: $currentstring = $token->[2];
306: } elsif ($target eq 'tex') {
307: $currentstring='}';
308: }
309: return $currentstring;
310: }
311:
312: #-- <input> tag (end tag forbidden)
313: sub start_input {
314: my ($target,$token) = @_;
315: my $currentstring = '';
316: if ($target eq 'web' || $target eq 'webgrade') {
317: $currentstring = $token->[4];
318: }
319: return $currentstring;
320: }
321:
322: sub end_input {
323: my ($target,$token) = @_;
324: my $currentstring = '';
325: if ($target eq 'web' || $target eq 'webgrade') {
326: $currentstring = $token->[2];
327: }
328: return $currentstring;
329: }
330:
331: #-- <textarea> tag (end tag required)
332: sub start_textarea {
333: my ($target,$token) = @_;
334: my $currentstring = '';
335: if ($target eq 'web' || $target eq 'webgrade') {
336: $currentstring = $token->[4];
337: }
338: return $currentstring;
339: }
340:
341: sub end_textarea {
342: my ($target,$token) = @_;
343: my $currentstring = '';
344: if ($target eq 'web' || $target eq 'webgrade') {
345: $currentstring = $token->[2];
346: }
347: return $currentstring;
348: }
349:
350: #-- <form> tag (end tag required)
351: sub start_form {
352: my ($target,$token) = @_;
353: my $currentstring = '';
354: if ($target eq 'web' || $target eq 'webgrade') {
355: $currentstring = $token->[4];
356: }
357: return $currentstring;
358: }
359:
360: sub end_form {
361: my ($target,$token) = @_;
362: my $currentstring = '';
363: if ($target eq 'web' || $target eq 'webgrade') {
364: $currentstring = $token->[2];
365: }
366: return $currentstring;
367: }
368:
369: #-- <title> tag (end tag required)
370: sub start_title {
371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
372: my $currentstring = '';
373: if ($target eq 'web' || $target eq 'webgrade') {
374: $Apache::londefdef::title =
375: &Apache::lonxml::get_all_text('/title',$parser,$style);
376: } elsif ($target eq 'tex') {
377: $currentstring .= '\keephidden{Title of the document: '
378: }
379: if ($target eq 'meta') {
380: $currentstring='<title>';
381: &start_output($target);
382: }
383: return $currentstring;
384: }
385:
386: sub end_title {
387: my ($target,$token) = @_;
388: my $currentstring = '';
389: if ($target eq 'web' || $target eq 'webgrade') {
390: # start_title takes care of swallowing the title
391: } elsif ($target eq 'tex') {
392: $currentstring .= '}';
393: }
394: if ($target eq 'meta') {
395: &end_output($target);
396: $currentstring='</title>';
397: }
398: return $currentstring;
399: }
400:
401: #-- <meta> tag (end tag forbidden)
402: sub start_meta {
403: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
404: my $currentstring = '';
405: if ($target eq 'web' || $target eq 'webgrade') {
406: my $args='';
407: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
408: if ($args eq '') {
409: &Apache::lonxml::get_all_text("/meta",$parser,$style);
410: } else {
411: $currentstring = $token->[4];
412: }
413: } elsif ($target eq 'meta') {
414: unless (&Apache::lonxml::get_param
415: ('http-equiv',$parstack,$safeeval,undef,1)) {
416: my $name=$token->[2]->{'name'};
417: $name=~tr/A-Z/a-z/;
418: $name=~s/\s/\_/gs;
419: $name=~s/\W//gs;
420: if ($name) {
421: $currentstring='<'.$name;
422: my $display=&Apache::lonxml::get_param
423: ('display',$parstack,$safeeval,undef,1);
424: if ($display) {
425: $display=~s/\"/\'/g;
426: $currentstring.=' display="'.$display.'"';
427: }
428: $currentstring.='>'.
429: &Apache::lonxml::get_param
430: ('content',$parstack,$safeeval,undef,1).
431: '</'.$name.'>';
432: }
433: my $display=&Apache::lonxml::get_param
434: ('display',$parstack,$safeeval,undef,1);
435: if ($display) {
436: $display=&HTML::Entities::encode($display,'<>&"');
437: $currentstring.='<'.$name.'.display>'.$display.
438: '</'.$name.'.display>';
439: }
440: }
441: } elsif ($target eq 'tex') {
442: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
443: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
444: if ((not defined $content) && (not defined $name)) {
445: &Apache::lonxml::startredirection();
446: }
447: }
448: return $currentstring;
449: }
450:
451: sub end_meta {
452: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
453: my $currentstring = '';
454: if ($target eq 'web' || $target eq 'webgrade') {
455: my $args='';
456: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
457: if ($args ne '') {
458: $currentstring = $token->[4];
459: }
460: } elsif ($target eq 'tex') {
461: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
462: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
463: if ((not defined $content) && (not defined $name)) {
464: &Apache::lonxml::endredirection();
465: }
466: }
467: return $currentstring;
468: }
469:
470: # accessrule
471: sub start_accessrule {
472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
473: my $currentstring = '';
474: my $eff=&Apache::lonxml::get_param
475: ('effect',$parstack,$safeeval,undef,1);
476: my $realm=&Apache::lonxml::get_param
477: ('realm',$parstack,$safeeval,undef,1);
478: my $role=&Apache::lonxml::get_param
479: ('role',$parstack,$safeeval,undef,1);
480: $realm=~s/\s+//g;
481: $realm=~s/\//\_/g;
482: $realm=~s/^\_//;
483: $realm=~s/\W/\;/g;
484: $role=~s/\s+//g;
485: $role=~s/\//\_/g;
486: $role=~s/\W/\;/g;
487: if ($target eq 'web') {
488: my $args='';
489: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
490: if ($args eq '') {
491: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
492: } else {
493: $currentstring = $token->[4];
494: }
495: }
496: if ($target eq 'meta') {
497: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
498: }
499: return $currentstring;
500: }
501:
502: sub end_accessrule {
503: my ($target,$token,$tagstack,$parstack,$parser) = @_;
504: my $currentstring = '';
505: if ($target eq 'web') {
506: my $args='';
507: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
508: if ($args ne '') {
509: $currentstring = $token->[4];
510: }
511: }
512: return $currentstring;
513: }
514:
515: #-- <body> tag (end tag required)
516: sub start_body {
517: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
518: my $currentstring = '';
519:
520: if ($target eq 'web' || $target eq 'webgrade') {
521: if ($Apache::lonhomework::parsing_a_problem) {
522: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
523: return '';
524: }
525:
526: if (&is_inside_of($tagstack, "head")) {
527: &end_head(@_);
528: }
529: $currentstring =
530: &Apache::loncommon::start_page($Apache::londefdef::title,
531: $Apache::londefdef::head,
532: {'add_entries' => $token->[2],
533: 'no_title' => 1,
534: 'force_register' => 1});
535:
536: if ($env{'request.state'} ne 'published') {
537: $currentstring.=&Apache::lonmenu::constspaceform();
538: $currentstring.=(<<EDITBUTTON);
539: <form method="post">
540: <input type="submit" name="editmode" accesskey="e" value="Edit" />
541: </form>
542: <br />
543: EDITBUTTON
544: }
545: $currentstring.=&Apache::lonxml::message_location();
546: } elsif ($target eq 'tex') {
547: $currentstring = '\begin{document}';
548: }
549: return $currentstring;
550: }
551:
552: sub end_body {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
554: my $currentstring = &end_p(); # Close off unclosed <p>
555: if ($target eq 'web' || $target eq 'webgrade') {
556: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
557: } elsif ($target eq 'tex') {
558: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
559: }
560: return $currentstring;
561: }
562:
563: # \begin{center} causes a new paragprah spacing that looks odd inside
564: # of a table cell
565: sub center_correction { return '\vspace*{-6 mm}'; }
566: #-- <center> tag (end tag required)
567: sub start_center {
568: my ($target,$token,$tagstack) = @_;
569: my $currentstring = &end_p(); # Close off any prior para.
570: if ($target eq 'web' || $target eq 'webgrade') {
571: $currentstring .= $token->[4];
572: } elsif ($target eq 'tex') {
573: if (&is_inside_of($tagstack, "table")) {
574: $currentstring .= ¢er_correction();
575: }
576: $currentstring .= '\begin{center}';
577: }
578: return $currentstring;
579: }
580:
581: sub end_center {
582: my ($target,$token,$tagstack) = @_;
583: my $currentstring = '';
584: if ($target eq 'web' || $target eq 'webgrade') {
585: $currentstring = $token->[2];
586: } elsif ($target eq 'tex') {
587: $currentstring = '\end{center}';
588: }
589: return $currentstring;
590: }
591:
592: #-- <b> tag (end tag required)
593: # NOTE: In TeX mode disables internal <p>
594: sub start_b {
595: my ($target,$token) = @_;
596: my $currentstring = '';
597: if ($target eq 'web' || $target eq 'webgrade') {
598: $currentstring = $token->[4];
599: } elsif ($target eq 'tex') {
600: &disable_para();
601: $currentstring .= '\textbf{';
602: }
603: return $currentstring;
604: }
605:
606: sub end_b {
607: my ($target,$token) = @_;
608: my $currentstring = '';
609: if ($target eq 'web' || $target eq 'webgrade') {
610: $currentstring = $token->[2];
611: } elsif ($target eq 'tex') {
612: &enable_para();
613: $currentstring = '}';
614: }
615: return $currentstring;
616: }
617:
618: #-- <strong> tag (end tag required)
619: # NOTE: in TeX mode disables internal <p>
620: sub start_strong {
621: my ($target,$token) = @_;
622: my $currentstring = '';
623: if ($target eq 'web' || $target eq 'webgrade') {
624: $currentstring = $token->[4];
625: } elsif ($target eq 'tex') {
626: &disable_para();
627: $currentstring = '\textbf{';
628: }
629: return $currentstring;
630: }
631:
632: sub end_strong {
633: my ($target,$token) = @_;
634: my $currentstring = '';
635: if ($target eq 'web' || $target eq 'webgrade') {
636: $currentstring = $token->[2];
637: } elsif ($target eq 'tex') {
638: &enable_para();
639: $currentstring = '}';
640: }
641: return $currentstring;
642: }
643:
644: #-- <h1> tag (end tag required)
645: sub start_h1 {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
647: my $currentstring = &end_p(); # Close off any prior para.
648: if ($target eq 'web' || $target eq 'webgrade') {
649: $currentstring .= $token->[4];
650: } elsif ($target eq 'tex') {
651: my $pre;
652: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
653: if ($align eq 'center') {
654: $pre='\begin{center}';
655: } elsif ($align eq 'left') {
656: $pre='\rlap{';
657: } elsif ($align eq 'right') {
658: $pre=' \hfill \llap{';
659: }
660: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
661: if (not defined $TeXsize) {$TeXsize="large";}
662: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
663: } elsif ($target eq 'meta') {
664: $currentstring.='<subject>';
665: &start_output($target);
666: }
667: return $currentstring;
668: }
669:
670: sub end_h1 {
671: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
672: my $currentstring = '';
673: if ($target eq 'web' || $target eq 'webgrade') {
674: $currentstring .= $token->[2];
675: } elsif ($target eq 'tex') {
676: my $post='\vskip 0 mm ';
677: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
678: if ($align eq 'center') {
679: $post='\end{center}';
680: } elsif ($align eq 'left') {
681: $post='} \hfill'.'\vskip 0 mm ';
682: } elsif ($align eq 'right') {
683: $post='}'.'\vskip 0 mm ';
684: }
685: $currentstring .= '}}'.$post;
686: } elsif ($target eq 'meta') {
687: &end_output($target);
688: $currentstring='</subject>';
689: }
690: return $currentstring;
691: }
692:
693: #-- <h2> tag
694: sub start_h2 {
695: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
696: my $currentstring = &end_p(); # Close off any prior para.
697: if ($target eq 'web' || $target eq 'webgrade') {
698: $currentstring .= $token->[4];
699: } elsif ($target eq 'tex') {
700: my $pre;
701: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
702: if ($align eq 'center') {
703: $pre='\begin{center}';
704: } elsif ($align eq 'left') {
705: $pre='\rlap{';
706: } elsif ($align eq 'right') {
707: $pre=' \hfill \llap{';
708: }
709: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
710: if (not defined $TeXsize) {$TeXsize="large";}
711: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
712: }
713: return $currentstring;
714: }
715:
716: sub end_h2 {
717: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
718: my $currentstring = '';
719: if ($target eq 'web' || $target eq 'webgrade') {
720: $currentstring .= $token->[2];
721: } elsif ($target eq 'tex') {
722: my $post='\vskip 0 mm ';
723: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
724: if ($align eq 'center') {
725: $post='\end{center}';
726: } elsif ($align eq 'left') {
727: $post='} \hfill'.'\vskip 0 mm ';
728: } elsif ($align eq 'right') {
729: $post='}'.'\vskip 0 mm ';
730: }
731: $currentstring .= '}}'.$post;
732: }
733: return $currentstring;
734: }
735:
736: #-- <h3> tag
737: sub start_h3 {
738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
739: my $currentstring = &end_p(); # Close off any prior para.
740: if ($target eq 'web' || $target eq 'webgrade') {
741: $currentstring .= $token->[4];
742: } elsif ($target eq 'tex') {
743: my $pre;
744: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
745: if ($align eq 'center') {
746: $pre='\begin{center}';
747: } elsif ($align eq 'left') {
748: $pre='\rlap{';
749: } elsif ($align eq 'right') {
750: $pre=' \hfill \llap{';
751: }
752: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
753: if (not defined $TeXsize) {$TeXsize="large";}
754: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
755: }
756: return $currentstring;
757: }
758:
759: sub end_h3 {
760: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
761: my $currentstring = '';
762: if ($target eq 'web' || $target eq 'webgrade') {
763: $currentstring .= $token->[2];
764: } elsif ($target eq 'tex') {
765: my $post='\vskip 0 mm ';
766: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
767: if ($align eq 'center') {
768: $post='\end{center}';
769: } elsif ($align eq 'left') {
770: $post='} \hfill'.'\vskip 0 mm ';
771: } elsif ($align eq 'right') {
772: $post='}'.'\vskip 0 mm ';
773: }
774: $currentstring .= '}}'.$post;
775: }
776: return $currentstring;
777: }
778:
779: #-- <h4> tag
780: sub start_h4 {
781: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
782: my $currentstring = &end_p(); # Close off any prior para.
783: if ($target eq 'web' || $target eq 'webgrade') {
784: $currentstring .= $token->[4];
785: } elsif ($target eq 'tex') {
786: my $pre;
787: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
788: if ($align eq 'center') {
789: $pre='\begin{center}';
790: } elsif ($align eq 'left') {
791: $pre='\rlap{';
792: } elsif ($align eq 'right') {
793: $pre=' \hfill \llap{';
794: }
795: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
796: if (not defined $TeXsize) {$TeXsize="large";}
797: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
798: }
799: return $currentstring;
800: }
801:
802: sub end_h4 {
803: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
804: my $currentstring = '';
805: if ($target eq 'web' || $target eq 'webgrade') {
806: $currentstring .= $token->[2];
807: } elsif ($target eq 'tex') {
808: my $post='\vskip 0 mm ';
809: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
810: if ($align eq 'center') {
811: $post='\end{center}';
812: } elsif ($align eq 'left') {
813: $post='} \hfill'.'\vskip 0 mm ';
814: } elsif ($align eq 'right') {
815: $post='}'.'\vskip 0 mm ';
816: }
817: $currentstring .= '}}'.$post;
818: }
819: return $currentstring;
820: }
821:
822: #-- <h5> tag
823: sub start_h5 {
824: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
825: my $currentstring = &end_p(); # Close off any prior paras.
826: if ($target eq 'web' || $target eq 'webgrade') {
827: $currentstring .= $token->[4];
828: } elsif ($target eq 'tex') {
829: my $pre;
830: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
831: if ($align eq 'center') {
832: $pre='\begin{center}';
833: } elsif ($align eq 'left') {
834: $pre='\rlap{';
835: } elsif ($align eq 'right') {
836: $pre=' \hfill \llap{';
837: }
838: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
839: if (not defined $TeXsize) {$TeXsize="large";}
840: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
841: }
842: return $currentstring;
843: }
844:
845: sub end_h5 {
846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
847: my $currentstring = '';
848: if ($target eq 'web' || $target eq 'webgrade') {
849: $currentstring .= $token->[2];
850: } elsif ($target eq 'tex') {
851: my $post='\vskip 0 mm ';
852: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
853: if ($align eq 'center') {
854: $post='\end{center}';
855: } elsif ($align eq 'left') {
856: $post='} \hfill'.'\vskip 0 mm ';
857: } elsif ($align eq 'right') {
858: $post='}'.'\vskip 0 mm ';
859: }
860: $currentstring .= '}}'.$post;
861: }
862: return $currentstring;
863: }
864:
865: #-- <h6> tag
866: sub start_h6 {
867: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
868: my $currentstring = &end_p(); # Close off any prior paras.
869: if ($target eq 'web' || $target eq 'webgrade') {
870: $currentstring .= $token->[4];
871: } elsif ($target eq 'tex') {
872: my $pre;
873: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
874: if ($align eq 'center') {
875: $pre='\begin{center}';
876: } elsif ($align eq 'left') {
877: $pre='\rlap{';
878: } elsif ($align eq 'right') {
879: $pre=' \hfill \llap{';
880: }
881: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
882: if (not defined $TeXsize) {$TeXsize="large";}
883: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
884: }
885: return $currentstring;
886: }
887:
888: sub end_h6 {
889: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
890: my $currentstring = '';
891: if ($target eq 'web' || $target eq 'webgrade') {
892: $currentstring .= $token->[2];
893: } elsif ($target eq 'tex') {
894: my $post='\vskip 0 mm ';
895: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
896: if ($align eq 'center') {
897: $post='\end{center}';
898: } elsif ($align eq 'left') {
899: $post='} \hfill'.'\vskip 0 mm ';
900: } elsif ($align eq 'right') {
901: $post='}'.'\vskip 0 mm ';
902: }
903: $currentstring .= '}}'.$post;
904: }
905: return $currentstring;
906: }
907:
908: #--- <cite> tag (end tag required)
909: sub start_cite {
910: my ($target,$token) = @_;
911: my $currentstring = '';
912: if ($target eq 'web' || $target eq 'webgrade') {
913: $currentstring .= $token->[4];
914: } elsif ($target eq 'tex') {
915: $currentstring .= '\textit{';
916: }
917: return $currentstring;
918: }
919:
920: sub end_cite {
921: my ($target,$token) = @_;
922: my $currentstring = '';
923: if ($target eq 'web' || $target eq 'webgrade') {
924: $currentstring .= $token->[2];
925: } elsif ($target eq 'tex') {
926: $currentstring .= '}';
927: }
928: return $currentstring;
929: }
930:
931: #-- <i> tag (end tag required)
932: sub start_i {
933: my ($target,$token) = @_;
934: my $currentstring = '';
935: if ($target eq 'web' || $target eq 'webgrade') {
936: $currentstring .= $token->[4];
937: } elsif ($target eq 'tex') {
938: $currentstring .= '\textit{';
939: }
940: return $currentstring;
941: }
942:
943: sub end_i {
944: my ($target,$token) = @_;
945: my $currentstring = '';
946: if ($target eq 'web' || $target eq 'webgrade') {
947: $currentstring .= $token->[2];
948: } elsif ($target eq 'tex') {
949: $currentstring .= '}';
950: }
951: return $currentstring;
952: }
953:
954: #-- <address> tag (end tag required)
955: sub start_address {
956: my ($target,$token) = @_;
957: my $currentstring = '';
958: if ($target eq 'web' || $target eq 'webgrade') {
959: $currentstring .= $token->[4];
960: } elsif ($target eq 'tex') {
961: $currentstring .= '\textit{';
962: }
963: return $currentstring;
964: }
965:
966: sub end_address {
967: my ($target,$token) = @_;
968: my $currentstring = '';
969: if ($target eq 'web' || $target eq 'webgrade') {
970: $currentstring .= $token->[2];
971: } elsif ($target eq 'tex') {
972: $currentstring .= '}';
973: }
974: return $currentstring;
975: }
976:
977: #-- <dfn> tag (end tag required)
978: sub start_dfn {
979: my ($target,$token) = @_;
980: my $currentstring = '';
981: if ($target eq 'web' || $target eq 'webgrade') {
982: $currentstring .= $token->[4];
983: } elsif ($target eq 'tex') {
984: $currentstring .= '\textit{';
985: }
986: return $currentstring;
987: }
988:
989: sub end_dfn {
990: my ($target,$token) = @_;
991: my $currentstring = '';
992: if ($target eq 'web' || $target eq 'webgrade') {
993: $currentstring .= $token->[2];
994: } elsif ($target eq 'tex') {
995: $currentstring .= '}';
996: }
997: return $currentstring;
998: }
999:
1000: #-- <tt> tag (end tag required)
1001: sub start_tt {
1002: my ($target,$token) = @_;
1003: my $currentstring = '';
1004: if ($target eq 'web' || $target eq 'webgrade') {
1005: $currentstring .= $token->[4];
1006: } elsif ($target eq 'tex') {
1007: $currentstring .= '\texttt{';
1008: }
1009: return $currentstring;
1010: }
1011:
1012: sub end_tt {
1013: my ($target,$token) = @_;
1014: my $currentstring = '';
1015: if ($target eq 'web' || $target eq 'webgrade') {
1016: $currentstring .= $token->[2];
1017: } elsif ($target eq 'tex') {
1018: $currentstring .= '}';
1019: }
1020: return $currentstring;
1021: }
1022:
1023: #-- <kbd> tag (end tag required)
1024: sub start_kbd {
1025: my ($target,$token) = @_;
1026: my $currentstring = '';
1027: if ($target eq 'web' || $target eq 'webgrade') {
1028: $currentstring .= $token->[4];
1029: } elsif ($target eq 'tex') {
1030: $currentstring .= '\texttt{';
1031: }
1032: return $currentstring;
1033: }
1034:
1035: sub end_kbd {
1036: my ($target,$token) = @_;
1037: my $currentstring = '';
1038: if ($target eq 'web' || $target eq 'webgrade') {
1039: $currentstring .= $token->[2];
1040: } elsif ($target eq 'tex') {
1041: $currentstring .= '}';
1042: }
1043: return $currentstring;
1044: }
1045:
1046: #-- <code> tag (end tag required)
1047: sub start_code {
1048: my ($target,$token) = @_;
1049: my $currentstring = '';
1050: if ($target eq 'web' || $target eq 'webgrade') {
1051: $currentstring .= $token->[4];
1052: } elsif ($target eq 'tex') {
1053: $currentstring .= '\texttt{';
1054: }
1055: return $currentstring;
1056: }
1057:
1058: sub end_code {
1059: my ($target,$token) = @_;
1060: my $currentstring = '';
1061: if ($target eq 'web' || $target eq 'webgrade') {
1062: $currentstring .= $token->[2];
1063: } elsif ($target eq 'tex') {
1064: $currentstring .= '}';
1065: }
1066: return $currentstring;
1067: }
1068:
1069: #-- <em> tag (end tag required)
1070: sub start_em {
1071: my ($target,$token) = @_;
1072: my $currentstring = '';
1073: if ($target eq 'web' || $target eq 'webgrade') {
1074: $currentstring .= $token->[4];
1075: } elsif ($target eq 'tex') {
1076: $currentstring .= '\emph{';
1077: }
1078: return $currentstring;
1079: }
1080:
1081: sub end_em {
1082: my ($target,$token) = @_;
1083: my $currentstring = '';
1084: if ($target eq 'web' || $target eq 'webgrade') {
1085: $currentstring .= $token->[2];
1086: } elsif ($target eq 'tex') {
1087: $currentstring .= '}';
1088: }
1089: return $currentstring;
1090: }
1091:
1092: #-- <q> tag (end tag required)
1093: sub start_q {
1094: my ($target,$token) = @_;
1095: my $currentstring = '';
1096: if ($target eq 'web' || $target eq 'webgrade') {
1097: $currentstring .= $token->[4];
1098: } elsif ($target eq 'tex') {
1099: $currentstring .= '\emph{';
1100: }
1101: return $currentstring;
1102: }
1103:
1104: sub end_q {
1105: my ($target,$token) = @_;
1106: my $currentstring = '';
1107: if ($target eq 'web' || $target eq 'webgrade') {
1108: $currentstring .= $token->[2];
1109: } elsif ($target eq 'tex') {
1110: $currentstring .= '}';
1111: }
1112: return $currentstring;
1113: }
1114:
1115: # <p> is a bit strange since it does not require a closing </p>
1116: # However in latex, we must often output closing stuff to end
1117: # environments and {}'s etc. Therefore we do all the work
1118: # of figuring out the ending strings in the start tag processing,
1119: # and provide a mechanism to output the stop text external
1120: # to tag processing.
1121: #
1122: {
1123:
1124: my $closing_string = ''; # String required to close <p>
1125:
1126: # Some tags are <p> fragile meaning that <p> inside of them
1127: # does not work within TeX mode. This is managed via the
1128: # counter below:
1129: #
1130:
1131: my $para_disabled = 0;
1132:
1133: sub disable_para {
1134: $para_disabled++;
1135: }
1136: sub enable_para {
1137: $para_disabled--;
1138: }
1139:
1140:
1141: #-- <p> tag (end tag optional)
1142: #optional attribute - align="center|left|right"
1143: sub start_p {
1144: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1145: my $currentstring = '';
1146: if ($target eq 'web' || $target eq 'webgrade') {
1147: $currentstring .= &end_p(); # close off prior para if in progress.
1148: $currentstring .= $token->[4];
1149: if (! ($currentstring =~ /\//)) {
1150: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1151: }
1152: } elsif ($target eq 'tex' && !$para_disabled) {
1153:
1154: $currentstring .= &end_p(); # close off prior para if in progress.
1155: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1156: if ($align eq 'center') {
1157: $currentstring .='\begin{center}\par ';
1158: $closing_string = '\end{center}';
1159: if (&is_inside_of($tagstack, "table")) {
1160: $currentstring = ¢er_correction().$currentstring;
1161: }
1162: } elsif ($align eq 'right') {
1163: $currentstring.="\n".'{\flushright ';
1164: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1165: $closing_string= "}\n";
1166: } elsif ($align eq 'left') {
1167: $currentstring.= "\n".'{\flushleft ';
1168: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1169: $closing_string = "}\n";
1170: } else {
1171: $currentstring.='\par ';
1172: if (&is_inside_of($tagstack, 'table')) {
1173: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1174: } else {
1175: $closing_string = '\strut\\\\\strut ';
1176: }
1177: }
1178:
1179: }
1180: return $currentstring;
1181: }
1182: #
1183: # End paragraph processing just requires that we output the
1184: # closing string that was saved and blank it.
1185: sub end_p {
1186: # Note only 'tex' mode uses disable_para and enable_para
1187: # so we don't need to know the target in the check below:
1188:
1189: if (!$para_disabled) {
1190: my $current_string = $closing_string;
1191: $closing_string = ''; # Not in a para anymore.
1192: return $current_string;
1193: } else {
1194: return '';
1195: }
1196:
1197: }
1198: }
1199: #-- <br> tag (end tag forbidden)
1200: sub start_br {
1201: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1202: my $currentstring = '';
1203: if ($target eq 'web' || $target eq 'webgrade') {
1204: $currentstring .= $token->[4];
1205: } elsif ($target eq 'tex') {
1206: my @tempo=@$tagstack;
1207: my $signal=0;
1208: # Not going to factor this to is_inside_of since that would require
1209: # multiple stack traversals.
1210: #
1211: for (my $i=$#tempo;$i>=0;$i--) {
1212: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1213: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1214: $signal=1;
1215: }
1216: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1217: $signal = 1;
1218: }
1219: }
1220: if ($signal eq 1) {
1221: $currentstring .= ' \vskip 0 mm ';
1222: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1223: $currentstring .= '\strut \\\\ \strut ';
1224: }
1225: }
1226: return $currentstring;
1227: }
1228:
1229: sub end_br {
1230: my ($target,$token) = @_;
1231: my $currentstring = '';
1232: if ($target eq 'web' || $target eq 'webgrade') {
1233: $currentstring .= $token->[2];
1234: }
1235: return $currentstring;
1236: }
1237:
1238: #-- <big> tag (end tag required)
1239: sub start_big {
1240: my ($target,$token) = @_;
1241: my $currentstring = '';
1242: if ($target eq 'web' || $target eq 'webgrade') {
1243: $currentstring .= $token->[4];
1244: } elsif ($target eq 'tex') {
1245: $currentstring .= '{\large ';
1246: }
1247: return $currentstring;
1248: }
1249:
1250: sub end_big {
1251: my ($target,$token) = @_;
1252: my $currentstring = '';
1253: if ($target eq 'web' || $target eq 'webgrade') {
1254: $currentstring .= $token->[2];
1255: } elsif ($target eq 'tex') {
1256: $currentstring .= '}';
1257: }
1258: return $currentstring;
1259: }
1260:
1261: #-- <small> tag (end tag required)
1262: sub start_small {
1263: my ($target,$token) = @_;
1264: my $currentstring = '';
1265: if ($target eq 'web' || $target eq 'webgrade') {
1266: $currentstring .= $token->[4];
1267: } elsif ($target eq 'tex') {
1268: $currentstring .= '{\footnotesize ';
1269: }
1270: return $currentstring;
1271: }
1272:
1273: sub end_small {
1274: my ($target,$token) = @_;
1275: my $currentstring = '';
1276: if ($target eq 'web' || $target eq 'webgrade') {
1277: $currentstring .= $token->[2];
1278: } elsif ($target eq 'tex') {
1279: $currentstring .= '}';
1280: }
1281: return $currentstring;
1282: }
1283:
1284: #-- <basefont> tag (end tag forbidden)
1285: sub start_basefont {
1286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1287: my $currentstring = '';
1288: if ($target eq 'web' || $target eq 'webgrade') {
1289: $currentstring = $token->[4];
1290: } elsif ($target eq 'tex') {
1291: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1292: if (defined $basesize) {
1293: $currentstring = '{\\'.$basesize.' ';
1294: }
1295: }
1296: return $currentstring;
1297: }
1298:
1299: sub end_basefont {
1300: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1301: my $currentstring = '';
1302: if ($target eq 'web' || $target eq 'webgrade') {
1303: $currentstring = $token->[4];
1304: } elsif ($target eq 'tex') {
1305: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1306: if (defined $basesize) {
1307: $currentstring = '}';
1308: }
1309: }
1310: return $currentstring;
1311: }
1312:
1313: #-- <font> tag (end tag required)
1314: sub start_font {
1315: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1316: my $currentstring = '';
1317: if ($target eq 'web' || $target eq 'webgrade') {
1318: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1319: if ($face!~/symbol/i) {
1320: if (($env{'browser.fontenhance'} eq 'on') ||
1321: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1322: }
1323: $currentstring = $token->[4];
1324: } elsif ($target eq 'tex') {
1325: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1326: if (defined $fontsize) {
1327: $currentstring = '{\\'.$fontsize.' ';
1328: }
1329: }
1330: return $currentstring;
1331: }
1332:
1333: sub end_font {
1334: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1335: my $currentstring = '';
1336: if ($target eq 'web' || $target eq 'webgrade') {
1337: $currentstring = $token->[2];
1338: } elsif ($target eq 'tex') {
1339: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1340: if (defined $fontsize) {
1341: $currentstring = '}';
1342: }
1343: }
1344: return $currentstring;
1345: }
1346:
1347: #-- <strike> tag (end tag required)
1348: sub start_strike {
1349: my ($target,$token) = @_;
1350: my $currentstring = '';
1351: if ($target eq 'web' || $target eq 'webgrade') {
1352: $currentstring .= $token->[4];
1353: } elsif ($target eq 'tex') {
1354: &Apache::lonxml::startredirection();
1355: }
1356: return $currentstring;
1357: }
1358:
1359: sub end_strike {
1360: my ($target,$token) = @_;
1361: my $currentstring = '';
1362: if ($target eq 'web' || $target eq 'webgrade') {
1363: $currentstring .= $token->[2];
1364: } elsif ($target eq 'tex') {
1365: $currentstring=&Apache::lonxml::endredirection();
1366: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1367: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1368: $currentstring=~s/(\S)\s*$/$1\}/;
1369: }
1370: return $currentstring;
1371: }
1372:
1373: #-- <s> tag (end tag required)
1374: sub start_s {
1375: my ($target,$token) = @_;
1376: my $currentstring = '';
1377: if ($target eq 'web' || $target eq 'webgrade') {
1378: $currentstring .= $token->[4];
1379: } elsif ($target eq 'tex') {
1380: &Apache::lonxml::startredirection();
1381: }
1382: return $currentstring;
1383: }
1384:
1385: sub end_s {
1386: my ($target,$token) = @_;
1387: my $currentstring = '';
1388: if ($target eq 'web' || $target eq 'webgrade') {
1389: $currentstring .= $token->[2];
1390: } elsif ($target eq 'tex') {
1391: $currentstring=&Apache::lonxml::endredirection();
1392: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1393: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1394: $currentstring=~s/(\S)\s*$/$1\}/;
1395: }
1396: return $currentstring;
1397: }
1398:
1399: #-- <sub> tag (end tag required)
1400: sub start_sub {
1401: my ($target,$token) = @_;
1402: my $currentstring = '';
1403: if ($target eq 'web' || $target eq 'webgrade') {
1404: $currentstring .= $token->[4];
1405: } elsif ($target eq 'tex') {
1406: $currentstring .= '\ensuremath{_{';
1407: }
1408: return $currentstring;
1409: }
1410:
1411: sub end_sub {
1412: my ($target,$token) = @_;
1413: my $currentstring = '';
1414: if ($target eq 'web' || $target eq 'webgrade') {
1415: $currentstring .= $token->[2];
1416: } elsif ($target eq 'tex') {
1417: $currentstring .= '}}';
1418: }
1419: return $currentstring;
1420: }
1421:
1422: #-- <sup> tag (end tag required)
1423: sub start_sup {
1424: my ($target,$token) = @_;
1425: my $currentstring = '';
1426: if ($target eq 'web' || $target eq 'webgrade') {
1427: $currentstring .= $token->[4];
1428: } elsif ($target eq 'tex') {
1429: $currentstring .= '\ensuremath{^{';
1430: }
1431: return $currentstring;
1432: }
1433:
1434: sub end_sup {
1435: my ($target,$token) = @_;
1436: my $currentstring = '';
1437: if ($target eq 'web' || $target eq 'webgrade') {
1438: $currentstring .= $token->[2];
1439: } elsif ($target eq 'tex') {
1440: $currentstring .= '}}';
1441: }
1442: return $currentstring;
1443: }
1444:
1445: #-- <hr> tag (end tag forbidden)
1446: sub start_hr {
1447: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1448: my $currentstring = &end_p(); # End enclosing para.
1449: if ($target eq 'web' || $target eq 'webgrade') {
1450: $currentstring .= $token->[4];
1451: } elsif ($target eq 'tex') {
1452: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1453: if (defined $LaTeXwidth) {
1454: if ($LaTeXwidth=~/^%/) {
1455: substr($LaTeXwidth,0,1)='';
1456: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1457: }
1458: } else {
1459: $LaTeXwidth ='0.9\textwidth';
1460: }
1461: my ($pre,$post);
1462: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1463: if (($align eq 'center') || (not defined $align)) {
1464: $pre=''; $post='';
1465: } elsif ($align eq 'left') {
1466: $pre='\rlap{'; $post='} \hfill';
1467: } elsif ($align eq 'right') {
1468: $pre=' \hfill \llap{'; $post='}';
1469: }
1470: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1471: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1472: }
1473: return $currentstring;
1474: }
1475:
1476: sub end_hr {
1477: my ($target,$token) = @_;
1478: my $currentstring = '';
1479: if ($target eq 'web' || $target eq 'webgrade') {
1480: $currentstring .= $token->[2];
1481: }
1482: return $currentstring;
1483: }
1484:
1485: #-- <div> tag (end tag required)
1486: {
1487:
1488: # Since div can be nested, the stack below is used
1489: # in 'tex' mode to store the ending strings
1490: # for the div stack.
1491:
1492: my @div_end_stack;
1493:
1494: sub start_div {
1495: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1496: my $currentstring = &end_p(); # Close enclosing para.
1497: if ($target eq 'web' || $target eq 'webgrade') {
1498: $currentstring .= $token->[4];
1499: }
1500: if ($target eq 'tex') {
1501: # 4 possible alignments: left, right, center, and -missing-.
1502:
1503: my $endstring = '';
1504:
1505: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1506: $safeeval, undef, 1));
1507: if ($align eq 'center') {
1508: $currentstring .= '\begin{center}';
1509: $endstring = '\end{center}';
1510: if (&is_inside_of($tagstack, "table")) {
1511: $currentstring = ¢er_correction().$currentstring;
1512: }
1513: }
1514: elsif ($align eq 'right') {
1515: $currentstring .= '\begin{flushright}';
1516: $endstring .= '\end{flushright}';
1517: } elsif ($align eq 'left') {
1518: $currentstring .= '\begin{flushleft}';
1519: $endstring = '\end{flushleft}';
1520: } else {
1521:
1522: }
1523: $currentstring .= "\n"; # For human readability.
1524: $endstring = "\n$endstring\n"; # For human readability
1525: push(@div_end_stack, $endstring);
1526: }
1527: return $currentstring;
1528: }
1529:
1530: sub end_div {
1531: my ($target,$token) = @_;
1532: my $currentstring = '';
1533: if ($target eq 'web' || $target eq 'webgrade') {
1534: $currentstring .= $token->[2];
1535: }
1536: if ($target eq 'tex') {
1537: my $endstring = pop @div_end_stack;
1538: $currentstring .= $endstring;
1539: }
1540: return $currentstring;
1541: }
1542: }
1543:
1544: #-- <a> tag (end tag required)
1545: sub start_a {
1546: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1547: my $currentstring = '';
1548: if ($target eq 'web' || $target eq 'webgrade') {
1549: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1550: undef,1);
1551: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1552: } elsif ($target eq 'tex') {
1553: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1554: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1555: if ($a=~/\S/) {
1556: $a=~s/([^\\])%/$1\\\%/g;
1557: $currentstring .= '\ref{URI: '.$a.'}';
1558: } elsif ($b=~/\S/) {
1559: $currentstring .= '\ref{Anchor: '.$b.'}';
1560: } else {
1561: $currentstring.='';
1562: }
1563: }
1564: return $currentstring;
1565: }
1566:
1567: sub end_a {
1568: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1569: my $currentstring = '';
1570: if ($target eq 'web' || $target eq 'webgrade') {
1571: $currentstring .= $token->[2];
1572: }
1573: return $currentstring;
1574: }
1575:
1576: #-- <li> tag (end tag optional)
1577: sub start_li {
1578: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1579: my $currentstring = '';
1580: if ($target eq 'web' || $target eq 'webgrade') {
1581: $currentstring = $token->[4];
1582: } elsif ($target eq 'tex') {
1583: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1584: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1585: #FIXME need to support types i and I
1586: if ($type=~/disc/) {
1587: $currentstring .= ' \item[$\bullet$] ';
1588: } elsif ($type=~/circle/) {
1589: $currentstring .= ' \item[$\circ$] ';
1590: } elsif ($type=~/square/) {
1591: $currentstring .= ' \item[$\diamond$] ';
1592: } elsif ($type eq '1') {
1593: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1594: } elsif ($type eq 'A') {
1595: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1596: } elsif ($type eq 'a') {
1597: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1598: } elsif ($value ne '') {
1599: $currentstring .= ' \item['.$value.'] ';
1600: } else {
1601: $currentstring .= ' \item ';
1602: }
1603: $Apache::londefdef::list_index++;
1604: }
1605: return $currentstring;
1606: }
1607:
1608: sub end_li {
1609: my ($target,$token) = @_;
1610: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1611: if ($target eq 'web' || $target eq 'webgrade') {
1612: $currentstring .= $token->[2];
1613: }
1614: return $currentstring;
1615: }
1616:
1617: #-- <u> tag (end tag required)
1618: sub start_u {
1619: my ($target,$token) = @_;
1620: my $currentstring = '';
1621: if ($target eq 'web' || $target eq 'webgrade') {
1622: $currentstring .= $token->[4];
1623: } elsif ($target eq 'tex') {
1624: &Apache::lonxml::startredirection();
1625: }
1626: return $currentstring;
1627: }
1628:
1629: sub end_u {
1630: my ($target,$token) = @_;
1631: my $currentstring = '';
1632: if ($target eq 'web' || $target eq 'webgrade') {
1633: $currentstring .= $token->[2];
1634: } elsif ($target eq 'tex') {
1635: $currentstring=&Apache::lonxml::endredirection();
1636: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1637: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1638: $currentstring=~s/(\S)\s*$/$1\}/;
1639: }
1640: return $currentstring;
1641: }
1642:
1643: #-- <ul> tag (end tag required)
1644: sub start_ul {
1645: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1646: my $currentstring = &end_p(); # Close off enclosing list.
1647: if ($target eq 'web' || $target eq 'webgrade') {
1648: $currentstring .= $token->[4];
1649: } elsif ($target eq 'tex') {
1650: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1651: $Apache::londefdef::list_index=0;
1652: if ($TeXtype eq 'disc') {
1653: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1654: '\renewcommand{\labelitemii}{$\bullet$}'.
1655: '\renewcommand{\labelitemiii}{$\bullet$}'.
1656: '\renewcommand{\labelitemiv}{$\bullet$}';
1657: } elsif ($TeXtype eq 'circle') {
1658: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1659: '\renewcommand{\labelitemii}{$\circ$}'.
1660: '\renewcommand{\labelitemiii}{$\circ$}'.
1661: '\renewcommand{\labelitemiv}{$\circ$}';
1662: } elsif ($TeXtype eq 'square') {
1663: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1664: '\renewcommand{\labelitemii}{$\diamond$}'.
1665: '\renewcommand{\labelitemiii}{$\diamond$}'.
1666: '\renewcommand{\labelitemiv}{$\diamond$}';
1667: }
1668: $currentstring .= '\strut \begin{itemize}';
1669: }
1670: return $currentstring;
1671: }
1672:
1673: sub end_ul {
1674: my ($target,$token) = @_;
1675: my $currentstring = '';
1676: if ($target eq 'web' || $target eq 'webgrade') {
1677: $currentstring = $token->[2];
1678: } elsif ($target eq 'tex') {
1679: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1680: '\renewcommand{\labelitemii}{$\bullet$}'.
1681: '\renewcommand{\labelitemiii}{$\bullet$}'.
1682: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1683: }
1684: return $currentstring;
1685: }
1686:
1687: #-- <menu> tag (end tag required)
1688: sub start_menu {
1689: my ($target,$token) = @_;
1690: my $currentstring = '';
1691: if ($target eq 'web' || $target eq 'webgrade') {
1692: $currentstring = $token->[4];
1693: } elsif ($target eq 'tex') {
1694: $currentstring = " \\begin{itemize} ";
1695: }
1696: return $currentstring;
1697: }
1698:
1699: sub end_menu {
1700: my ($target,$token) = @_;
1701: my $currentstring = '';
1702: if ($target eq 'web' || $target eq 'webgrade') {
1703: $currentstring = $token->[2];
1704: } elsif ($target eq 'tex') {
1705: $currentstring = " \\end{itemize}";
1706: }
1707: return $currentstring;
1708: }
1709:
1710: #-- <dir> tag (end tag required)
1711: sub start_dir {
1712: my ($target,$token) = @_;
1713: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1714: if ($target eq 'web' || $target eq 'webgrade') {
1715: $currentstring .= $token->[4];
1716: } elsif ($target eq 'tex') {
1717: $currentstring .= " \\begin{itemize} ";
1718: }
1719: return $currentstring;
1720: }
1721:
1722: sub end_dir {
1723: my ($target,$token) = @_;
1724: my $currentstring = '';
1725: if ($target eq 'web' || $target eq 'webgrade') {
1726: $currentstring = $token->[2];
1727: } elsif ($target eq 'tex') {
1728: $currentstring = " \\end{itemize}";
1729: }
1730: return $currentstring;
1731: }
1732:
1733: #-- <ol> tag (end tag required)
1734: sub start_ol {
1735: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1736: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1737: if ($target eq 'web' || $target eq 'webgrade') {
1738: $currentstring .= $token->[4];
1739: } elsif ($target eq 'tex') {
1740: $Apache::londefdef::list_index=0;
1741: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1742: if ($type eq '1') {
1743: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1744: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1745: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1746: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1747: } elsif ($type eq 'A') {
1748: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1749: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1750: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1751: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1752: } elsif ($type eq 'a') {
1753: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1754: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1755: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1756: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1757: } elsif ($type eq 'i') {
1758: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1759: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1760: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1761: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1762: } elsif ($type eq 'I') {
1763: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1764: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1765: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1766: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1767: }
1768: $currentstring .= '\strut \begin{enumerate}';
1769: }
1770: return $currentstring;
1771: }
1772:
1773: sub end_ol {
1774: my ($target,$token) = @_;
1775: my $currentstring = '';
1776: if ($target eq 'web' || $target eq 'webgrade') {
1777: $currentstring = $token->[2];
1778: } elsif ($target eq 'tex') {
1779: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1780: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1781: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1782: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1783: }
1784: return $currentstring;
1785: }
1786:
1787: #-- <dl> tag (end tag required)
1788: sub start_dl {
1789: my ($target,$token) = @_;
1790: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1791: if ($target eq 'web' || $target eq 'webgrade') {
1792: $currentstring .= $token->[4];
1793: } elsif ($target eq 'tex') {
1794: $currentstring .= '\begin{description}';
1795: $Apache::londefdef::DL++;
1796: push(@Apache::londefdef::description,[]);
1797: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1798: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1799: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1800: }
1801: return $currentstring;
1802: }
1803:
1804: sub end_dl {
1805: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1806: my $currentstring = '';
1807: if ($target eq 'web' || $target eq 'webgrade') {
1808: $currentstring = $token->[2];
1809: } elsif ($target eq 'tex') {
1810: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1811: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1812: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1813: $currentstring.=' '.$element.' ';
1814: }
1815: pop(@Apache::londefdef::description);
1816: $currentstring.='\end{description}';
1817: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1818: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1819: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1820: $Apache::londefdef::DL--;
1821: }
1822: return $currentstring;
1823: }
1824:
1825: #-- <dt> tag (end tag optional)
1826: sub start_dt {
1827: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1828: my $currentstring='';
1829: if ($target eq 'web' || $target eq 'webgrade') {
1830: $currentstring = $token->[4];
1831: } elsif ($target eq 'tex') {
1832: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1833: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1834: &Apache::lonxml::startredirection();
1835: $Apache::londefdef::DT[-1]++;
1836: $Apache::londefdef::seenDT[-1]=1;
1837: }
1838: return $currentstring;
1839: }
1840:
1841: sub end_dt {
1842: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1843: my $currentstring = '';
1844: if ($target eq 'web' || $target eq 'webgrade') {
1845: $currentstring = $token->[2];
1846: } elsif ($target eq 'tex') {
1847: if ($Apache::londefdef::DT[-1]) {
1848: my $data=&item_cleanup();
1849: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1850: $Apache::londefdef::DT[-1]--;
1851: }
1852: }
1853: return $currentstring;
1854: }
1855:
1856: sub item_cleanup {
1857: my $item=&Apache::lonxml::endredirection();
1858: $item=~s/\\begin{center}//g;
1859: $item=~s/\\end{center}//g;
1860: return $item;
1861: }
1862:
1863: #-- <dd> tag (end tag optional)
1864: sub start_dd {
1865: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1866: my $currentstring = '';
1867: if ($target eq 'web' || $target eq 'webgrade') {
1868: $currentstring = $token->[4];
1869: } elsif ($target eq 'tex') {
1870: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1871: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1872: if (!$Apache::londefdef::seenDT[-1]) {
1873: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1874: }
1875: push(@{$Apache::londefdef::description[-1]},'');
1876: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1877: $Apache::londefdef::DD[-1]++;
1878: &Apache::lonxml::startredirection();
1879: }
1880: return $currentstring;
1881: }
1882:
1883: sub end_dd {
1884: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1885: my $currentstring = '';
1886: if ($target eq 'web' || $target eq 'webgrade') {
1887: $currentstring = $token->[2];
1888: } elsif ($target eq 'tex') {
1889: $Apache::londefdef::description[-1]->[-1].=
1890: &Apache::lonxml::endredirection().' \vskip 0mm ';
1891: $Apache::londefdef::DD[-1]--;
1892: }
1893: return $currentstring;
1894: }
1895:
1896: #-- <table> tag (end tag required)
1897: # <table> also ends any prior <p> that is not closed.
1898: # but, unless I allow <p>'s to nest, that's the
1899: # only way I could think of to allow <p> in
1900: # <tr> <th> bodies
1901: #
1902: #list of supported attributes: border,width,TeXwidth
1903: sub start_table {
1904: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1905: my $textwidth = '';
1906: my $currentstring = &end_p();
1907: if ($target eq 'web' || $target eq 'webgrade') {
1908: $currentstring .= $token->[4];
1909: } elsif ($target eq 'tex') {
1910: my $aa = {};
1911: push @Apache::londefdef::table, $aa;
1912: $Apache::londefdef::table[-1]{'row_number'} = -1;
1913: #maximum table's width (default coincides with text line length)
1914: if ($#Apache::londefdef::table==0) {
1915: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1916: $textwidth=~/(\d+\.?\d*)/;
1917: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1918: } else {
1919: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1920: #the maximum width of nested table is determined by LATeX width of parent cell
1921: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1922: } else {
1923: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1924: $textwidth=$Apache::londefdef::table[-2]{'width'};
1925: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1926: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1927: }
1928: }
1929: }
1930:
1931: # width either comes forced from the TeXwidth or the width parameters.
1932: # in either case it can be a percentage or absolute width.
1933: # in the width case we ignore absolute width
1934: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1935: if (!defined($TeXwidth)) {
1936: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1937: $safeeval,undef,1);
1938: if ($htmlwidth =~ /%/) {
1939: $TeXwidth = $htmlwidth;
1940: } else {
1941: $TeXwidth = $textwidth;
1942: }
1943: } else {
1944: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1945: }
1946: if ($TeXwidth=~/%/) {
1947: $Apache::londefdef::table[-1]{'percent'}=1;
1948: $TeXwidth=~/(\d+)/;
1949: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1950: } else {
1951: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1952: }
1953: # In the end, however the table width cannot be wider than $textwidth...
1954:
1955: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1956: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1957: }
1958:
1959: #table's border
1960: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1961: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1962: unless (defined $border) { $border = 0; }
1963: if ($border) {
1964: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1965: $Apache::londefdef::table[-1]{'vinc'} = '&';
1966: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1967: } else {
1968: $Apache::londefdef::table[-1]{'hinc'} = '';
1969: $Apache::londefdef::table[-1]{'vinc'} = '&';
1970: $Apache::londefdef::table[-1]{'vvinc'} = '';
1971: }
1972: if ($#Apache::londefdef::table==0) {
1973: # Note that \newline seems to destroy the alignment envs.
1974: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1975: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1976: }
1977: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1978: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1979: $Apache::londefdef::table[-1]{'objectlen'}=[];
1980: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1981: $Apache::londefdef::table[-1]{'maxlen'}=[];
1982: $Apache::londefdef::table[-1]{'minlen'}=[];
1983: $Apache::londefdef::table[-1]{'content'}=[];
1984: $Apache::londefdef::table[-1]{'align'}=[];
1985: $currentstring.='\keephidden{NEW TABLE ENTRY}';
1986:
1987:
1988: }
1989: return $currentstring;
1990: }
1991:
1992: sub end_table {
1993: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1994: my $currentstring = '';
1995: if ($target eq 'web' || $target eq 'webgrade') {
1996: $currentstring = $token->[2];
1997: } elsif ($target eq 'tex') {
1998: my $inmemory = '';
1999: my $output = '';
2000: my $WARNING='';
2001: #width of columns from TeXwidth attributes
2002:
2003: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2004: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2005: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2006: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2007: }
2008: }
2009: }
2010: #free space and number of empty columns
2011: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2012: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2013: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2014: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2015: $empty_columns++;
2016: } else {
2017: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2018: }
2019: }
2020: #boundaries for contents columns
2021: my @min_len=();#columns can not be narrower
2022: my @max_len=();#maximum length of column
2023: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2024: my ($localmin,$localmax)=(0,0);
2025: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2026: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2027: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2028: }
2029: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2030: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2031: }
2032: }
2033: push @min_len, $localmin;
2034: push @max_len, $localmax;
2035: }
2036: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2037: my $localmin=0,;
2038: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2039: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2040: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2041: }
2042: }
2043: if ($max_len[$jn]<$localmin) {
2044: $max_len[$jn]=$localmin;
2045: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2046: }#object size is bigger
2047: if ($min_len[$jn]<$localmin) {
2048: $min_len[$jn]=$localmin;
2049: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2050: }#object size is bigger
2051: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2052: $min_len[$jn]=0;
2053: $max_len[$jn]=0;
2054: }
2055: }
2056: #final adjustment of column width
2057: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2058: my @adjust=();
2059: #step 1. adjustment by maximum value
2060: my $space_neeeded=0;
2061: for (my $jn=0;$jn<=$#max_len;$jn++) {
2062: $space_neeeded=$space_neeeded+$max_len[$jn];
2063: }
2064: if ($space_neeeded<=$available_space) {
2065: for (my $jn=0;$jn<=$#max_len;$jn++) {
2066: if ($fwidth[$jn]==0) {
2067: $fwidth[$jn]=$max_len[$jn];
2068: }
2069: }
2070: } else {
2071: #step 2. adjustment by minimum value (estimation)
2072: $space_neeeded=0;
2073: for (my $jn=0;$jn<=$#min_len;$jn++) {
2074: $space_neeeded+=$min_len[$jn];
2075: }
2076: if ($space_neeeded>$available_space) {
2077: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2078: for (my $jn=0;$jn<=$#max_len;$jn++) {
2079: if ($fwidth[$jn]==0) {
2080: $fwidth[$jn]=$min_len[$jn];
2081: }
2082: }
2083: #check if we have objects which can be scaled
2084: my $how_many_to_scale=0;
2085: my @to_scale=();
2086: for (my $jn=0;$jn<=$#max_len;$jn++) {
2087: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2088: $how_many_to_scale++;
2089: push @to_scale, $jn;
2090: }
2091: }
2092: if ($how_many_to_scale>0) {
2093: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2094: foreach my $jn (@to_scale) {
2095: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2096: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2097: if ($1 ne '') {
2098: my $current_length=&recalc($1);
2099: $current_length=~/(\d+\.?\d*)/;
2100: $current_length=$current_length-$space_to_adjust;
2101: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2102: }
2103: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2104: if ($1 ne '') {
2105: my $current_length=$1;
2106: $current_length=$current_length-$space_to_adjust;
2107: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2108: }
2109: }
2110: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2111: }
2112: }
2113: } else {
2114: #step 3. adjustment over minimal + corrections
2115: my $enlarge_coef=$available_space/$space_neeeded;
2116: my $acsessive=0;
2117: for (my $jn=0;$jn<=$#min_len;$jn++) {
2118: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2119: if ($adjust[$jn]>$max_len[$jn]) {
2120: $fwidth[$jn]=$max_len[$jn];
2121: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2122: $adjust[$jn]=0;
2123: }
2124: }
2125: if ($acsessive>0) {
2126: #we have an excess of space and can redistribute it
2127: my $notempty_columns=0;
2128: for (my $jn=0;$jn<=$#min_len;$jn++) {
2129: if ($adjust[$jn]!=0) {
2130: $notempty_columns++;
2131: }
2132: }
2133: my $per_column=$acsessive/$notempty_columns;
2134: for (my $jn=0;$jn<=$#min_len;$jn++) {
2135: if ($adjust[$jn]!=0) {
2136: $adjust[$jn]+=$per_column;
2137: $fwidth[$jn]=$adjust[$jn];
2138: }
2139: }
2140: } else {
2141: for (my $jn=0;$jn<=$#min_len;$jn++) {
2142: $fwidth[$jn]=$adjust[$jn];
2143: }
2144: }
2145: }
2146: }
2147: #use all available width if it is defined in % or as TeXwidth
2148: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2149: my $current=0;
2150: for (my $i=0;$i<=$#fwidth;$i++) {
2151: $current+=$fwidth[$i];
2152: }
2153: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2154: for (my $i=0;$i<=$#fwidth;$i++) {
2155: $fwidth[$i]*=$coef;
2156: }
2157: }
2158: #removing of empty columns if allowed
2159: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2160: if ($permission eq 'yes') {
2161: my @cleaned_table=();
2162: my @cleaned_header=();
2163: my $colind=0;
2164: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2165: if ($fwidth[$jn]!=0) {
2166: #we need to copy column
2167: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2168: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2169: $cleaned_header[$colind]=$fwidth[$jn];
2170: }
2171: $colind++;
2172: }
2173: }
2174: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2175: @fwidth=@cleaned_header;
2176: }
2177: #construct header of the table
2178: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2179: for (my $in=0;$in<=$#fwidth;$in++) {
2180: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2181: }
2182: $header_of_table .= '}';
2183: #fill the table
2184: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2185: my $have_rowspan = 0;
2186: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2187:
2188: #-----------------------------------------------------------
2189: # I think this order of doing things will ensure that
2190: # single rowspan, columspan and combined row/colspans will
2191: # work correctly. LaTeX is delicate here.
2192: # RF.
2193:
2194: # Start a rowspan if necessary:
2195:
2196: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2197: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2198: #
2199: # Do the appropriate magic if this has a colspan
2200: #
2201:
2202: if ($colspan > 1) {
2203: my $spanwidth = 0;
2204: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2205: $spanwidth += $fwidth[$spancol];
2206: }
2207: $output .= '\multicolumn{'.
2208: $colspan
2209: ."}{|p{$spanwidth mm}|}{";
2210: }
2211:
2212: if ($rowspan > 1) {
2213: $have_rowspan++;
2214: $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
2215: }
2216: if (($rowspan eq '^') || ($rowspan eq '_')) {
2217: $have_rowspan++;
2218: }
2219: #--------------------------------------------------------------
2220:
2221: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2222: $output.=¢er_correction().'\begin{center}';
2223: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2224: $output.=' \hfill \llap{'
2225: }
2226: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2227: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2228: $output.='\end{center}';
2229: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2230: $output.='} ';
2231: }
2232: # Close off any open multirow:
2233:
2234: if ($rowspan > 1) {
2235: $output .= '}';
2236: }
2237: # Close off the colspan...
2238: #
2239: if ($colspan > 1) {
2240: $output .= '}';
2241: $jn += $colspan-1; # Adjust for number of rows really left.
2242: }
2243: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2244: }
2245: # If have_rowspan > 0, and borders are on, then
2246: # we need to do more than put an \hline at the bottom of row.
2247: # we need to do the appropriate \cline to ensure that
2248: # the spanned rows don't have \hlines through them.
2249:
2250: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2251: $output .= ' \\\\ ';
2252: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2253: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2254: if ($rowspan ne "^") {
2255: if (($rowspan <= 1) || ($rowspan eq '_')) {
2256: my $column = $jn+1;
2257: $output .= '\cline{'.$column.'-'.$column.'} ';
2258: }
2259: }
2260: }
2261:
2262: } else {
2263: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2264: }
2265: }
2266: # Note that \newline destroys alignment env's produced by e.g. <div>
2267: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2268: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2269: if ($#Apache::londefdef::table > 0) {
2270: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2271: # Figure out max/and min width by summing us and then
2272: # apply that to the current column of the table we nest in
2273: # if it's larger than the current width or the current width
2274: # is undefined.
2275: #
2276: my $min_nested_width = 0;
2277: my $max_nested_width = 0;
2278: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2279: $min_nested_width += $min_len[$col];
2280: $max_nested_width += $max_len[$col];
2281:
2282: }
2283: # Fudge in an extra 5 mm for borders etc:
2284:
2285: $min_nested_width += 5;
2286: $max_nested_width += 5;
2287:
2288: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2289: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2290: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2291: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2292: }
2293: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2294: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2295: }
2296:
2297: pop @Apache::londefdef::table;
2298: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2299: } else {
2300: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2301: pop @Apache::londefdef::table;
2302: undef @Apache::londefdef::table;
2303: }
2304: }
2305: return $currentstring;
2306: }
2307:
2308: #-- <tr> tag (end tag optional)
2309: sub start_tr {
2310: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2311: my $currentstring = '';
2312: if ($target eq 'web' || $target eq 'webgrade') {
2313: $currentstring = $token->[4];
2314: } elsif ($target eq 'tex') {
2315: $Apache::londefdef::table[-1]{'row_number'}++;
2316: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2317: if ($alignchar ne '') {
2318: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2319: } else {
2320: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2321: }
2322: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2323: #
2324: # Need to save the number of table columns to preserve the max # columns.
2325: #
2326: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2327: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2328: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2329: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2330: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2331: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2332: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2333: }
2334: return $currentstring;
2335: }
2336:
2337: sub end_tr {
2338: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2339: my $currentstring = &end_p(); # Close any pending <p> in the row.
2340: if ($target eq 'web' || $target eq 'webgrade') {
2341: $currentstring .= $token->[2];
2342: } elsif ($target eq 'tex') {
2343: if ($Apache::londefdef::TD_redirection) {
2344: &end_td_tex($parstack,$parser,$safeeval);
2345: }
2346: # Counter columns must be the maximum number of columns seen
2347: # in the table so far so:
2348: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2349: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2350: }
2351:
2352:
2353:
2354: }
2355: return $currentstring;
2356: }
2357:
2358: #-- <td> tag (end tag optional)
2359: sub start_td {
2360: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2361: my $currentstring = '';
2362: if ($target eq 'web' || $target eq 'webgrade') {
2363: $currentstring = $token->[4];
2364: } elsif ($target eq 'tex') {
2365: $Apache::londefdef::TD_redirection = 1;
2366: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2367: }
2368: return $currentstring;
2369: }
2370:
2371: sub tag_check {
2372: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2373: my @ar=@$parstack;
2374: for (my $i=$#ar-1;$i>=0;$i--) {
2375: if (lc($$tagstack[$i]) eq $good_tag) {
2376: &start_td_tex($parstack,$parser,$safeeval);
2377: last;
2378: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2379: splice @ar, $i+1;
2380: &end_td_tex(\@ar,$parser,$safeeval);
2381: &start_td_tex($parstack,$parser,$safeeval);
2382: last;
2383: }
2384: }
2385: return '';
2386: }
2387:
2388: sub start_td_tex {
2389: my ($parstack,$parser,$safeeval) = @_;
2390: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2391: if ($alignchar eq '') {
2392: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2393: }
2394: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2395: $Apache::londefdef::table[-1]{'counter_columns'}++;
2396: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2397: if (defined $TeXwidth) {
2398: my $current_length=&recalc($TeXwidth);
2399: $current_length=~/(\d+\.?\d*)/;
2400: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2401: }
2402: &Apache::lonxml::startredirection();
2403: return '';
2404: }
2405:
2406: sub end_td_tex {
2407: my ($parstack,$parser,$safeeval) = @_;
2408: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2409: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2410: my $data = &Apache::lonxml::endredirection();
2411:
2412: # The rowspan array of the table indicates which cells are part of a span.
2413: # n indicates the start of a span set of n rows.
2414: # ^ indicates a cell that continues a span set.
2415: # _ indicates the cell is at the bottom of a span set.
2416: # If this and subsequent cells are part of a rowspan, we must
2417: # push along the row until we find one that is not.
2418:
2419: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2420: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2421: # Part of a span.
2422: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2423: $current_column++;
2424: }
2425: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2426:
2427:
2428: # Get the column and row spans.
2429: # Colspan can be done via \multicolumn if I can figure out the data structs.
2430:
2431: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2432: if (!$colspan) {
2433: $colspan = 1;
2434: }
2435:
2436: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2437: if (!$rowspan) {
2438: $rowspan = 1;
2439: }
2440:
2441:
2442:
2443: for (my $c = 0; $c < $colspan; $c++) {
2444: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2445: for (my $i = 1; $i < $rowspan; $i++) {
2446: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2447: if ($i == ($rowspan-1)) {
2448: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2449: }
2450: }
2451: }
2452:
2453: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2454: if (defined $TeXwidth) {
2455: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2456: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2457: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2458: } else {
2459: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2460: my $garbage_data=$data;
2461: my $fwidth=0;
2462: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2463: my $current_length=&recalc($1);
2464: $current_length=~/(\d+\.?\d*)/;
2465: if ($fwidth<$1) {$fwidth=$1;}
2466: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2467: }
2468: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2469: my $current_length=$1;
2470: if ($fwidth<$current_length) {$fwidth=$current_length;}
2471: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2472: }
2473: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2474: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2475: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2476: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2477: } elsif ($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)*/) {
2478: my $garbage_data=$data;
2479: my $fwidth=0;
2480: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2481: my $current_length=&recalc($1);
2482: $current_length=~/(\d+\.?\d*)/;
2483: if ($fwidth<$1) {$fwidth=$1;}
2484: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2485: }
2486: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2487: my $current_length=&recalc($1);
2488: $current_length=~/(\d+\.?\d*)/;
2489: if ($fwidth<$1) {$fwidth=$1;}
2490: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2491: }
2492: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2493: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2494: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2495: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2496: $data=~s/\\\\\s*$//;
2497: } else {
2498: $data=~s/^\s+(\S.*)/$1/;
2499: $data=~s/(.*\S)\s+$/$1/;
2500: $data=~s/(\s)+/$1/;
2501: my ($current_length,$min_length)=(0,0);
2502: if ($data=~/\\vskip/) {
2503: my $newdata=$data;
2504: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2505: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2506: foreach my $elementdata (@newdata) {
2507: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2508: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2509: my @words=split(/ /,$elementdata);
2510: foreach my $word (@words) {
2511: my $lengthword=2.5*&LATEX_length($word);
2512: if ($min_length<$lengthword) {$min_length=$lengthword;}
2513: }
2514: }
2515: } else {
2516: $current_length=2.5*&LATEX_length($data);
2517: my @words=split(/ /,$data);
2518: foreach my $word (@words) {
2519: my $lengthword=2*&LATEX_length($word);
2520: if ($min_length<$lengthword) {$min_length=$lengthword;}
2521: }
2522: }
2523: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2524: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2525: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2526: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2527: }
2528: }
2529: # Substitute all of the tables nested in this cell in their appropriate places.
2530:
2531:
2532: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2533: for (my $in=0; $in<=$nested_count; $in++) {
2534: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2535: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2536: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2537: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2538:
2539: }
2540: # Should be be killing off the 'include' elements as they're used up?
2541:
2542: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2543:
2544:
2545:
2546:
2547: # the colspan array will indicate how many columns will be spanned by this
2548: # cell..this requires that counter_columns also be adjusted accordingly
2549: # so that the next bunch of text goes in the right cell. Note that since
2550: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2551: #
2552:
2553: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2554: for (my $i = 0; $i < ($colspan -1); $i++) {
2555: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2556: }
2557: for (my $r = 0; $r < $rowspan; $r++) {
2558: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2559: # Put empty text in spanned cols.
2560:
2561: }
2562:
2563:
2564:
2565: return '';
2566: }
2567:
2568: sub end_td {
2569: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2570: my $currentstring = '';
2571: if ($target eq 'web' || $target eq 'webgrade') {
2572: $currentstring = $token->[2];
2573: } elsif ($target eq 'tex') {
2574: $Apache::londefdef::TD_redirection =0;
2575: &end_td_tex($parstack,$parser,$safeeval);
2576: }
2577: return $currentstring;
2578: }
2579:
2580: #-- <th> tag (end tag optional)
2581: sub start_th {
2582: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2583: my $currentstring = '';
2584: if ($target eq 'web' || $target eq 'webgrade') {
2585: $currentstring = $token->[4];
2586: } elsif ($target eq 'tex') {
2587: $Apache::londefdef::TD_redirection = 1;
2588: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2589: }
2590: return $currentstring;
2591: }
2592:
2593: sub tagg_check {
2594: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2595: my @ar=@$parstack;
2596: for (my $i=$#ar-1;$i>=0;$i--) {
2597: if (lc($$tagstack[$i]) eq $good_tag) {
2598: &start_th_tex($parstack,$parser,$safeeval);
2599: last;
2600: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2601: splice @ar, $i+1;
2602: &end_th_tex(\@ar,$parser,$safeeval);
2603: &start_th_tex($parstack,$parser,$safeeval);
2604: last;
2605: }
2606: }
2607: return '';
2608: }
2609:
2610: sub start_th_tex {
2611: my ($parstack,$parser,$safeeval) = @_;
2612: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2613: if ($alignchar eq '') {
2614: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2615: }
2616: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2617: $Apache::londefdef::table[-1]{'counter_columns'}++;
2618: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2619: if (defined $TeXwidth) {
2620: my $current_length=&recalc($TeXwidth);
2621: $current_length=~/(\d+\.?\d*)/;
2622: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2623: }
2624: &Apache::lonxml::startredirection();
2625: return '';
2626: }
2627:
2628: sub end_th_tex {
2629: my ($parstack,$parser,$safeeval) = @_;
2630: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2631: my $data=&Apache::lonxml::endredirection();
2632: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2633: if (defined $TeXwidth) {
2634: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2635: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2636: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2637: } else {
2638: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2639: my $garbage_data=$data;
2640: my $fwidth=0;
2641: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2642: my $current_length=&recalc($1);
2643: $current_length=~/(\d+\.?\d*)/;
2644: if ($fwidth<$1) {$fwidth=$1;}
2645: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2646: }
2647: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2648: my $current_length=$1;
2649: if ($fwidth<$current_length) {$fwidth=$current_length;}
2650: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2651: }
2652: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2653: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2654: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2655: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2656: } else {
2657: $data=~s/^\s+(\S.*)/$1/;
2658: $data=~s/(.*\S)\s+$/$1/;
2659: $data=~s/(\s)+/$1/;
2660: my ($current_length,$min_length)=(0,0);
2661: if ($data=~/\\vskip/) {
2662: my $newdata=$data;
2663: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2664: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2665: foreach my $elementdata (@newdata) {
2666: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2667: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2668: my @words=split(/ /,$elementdata);
2669: foreach my $word (@words) {
2670: my $lengthword=2.5*&LATEX_length($word);
2671: if ($min_length<$lengthword) {$min_length=$lengthword;}
2672: }
2673: }
2674: } else {
2675: $current_length=2.5*&LATEX_length($data);
2676: my @words=split(/ /,$data);
2677: foreach my $word (@words) {
2678: my $lengthword=2*&LATEX_length($word);
2679: if ($min_length<$lengthword) {$min_length=$lengthword;}
2680: }
2681: }
2682: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2683: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2684: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2685: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2686: }
2687: }
2688: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2689: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2690: }
2691: #make data bold
2692: $data='\textbf{'.$data.'}';
2693: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2694: return'';
2695: }
2696:
2697: sub end_th {
2698: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2699: my $currentstring = &end_p(); # Close any open <p> in the row.
2700: if ($target eq 'web' || $target eq 'webgrade') {
2701: $currentstring .= $token->[2];
2702: } elsif ($target eq 'tex') {
2703: $Apache::londefdef::TD_redirection =0;
2704: &end_th_tex($parstack,$parser,$safeeval);
2705: }
2706: return $currentstring;
2707: }
2708:
2709: #-- <img> tag (end tag forbidden)
2710: #
2711: # Render the <IMG> tag.
2712: # <IMG> has the following attributes (in addition to the
2713: # standard HTML ones:
2714: # TeXwrap - Governs how the tex target will try to wrap text around
2715: # horizontally aligned images.
2716: # TeXwidth - The width of the image when rendered for print (mm).
2717: # TeXheight - The height of the image when rendered for print (mm)
2718: # (Note there seems to also be support for this as a % of page size)
2719: #
2720: sub start_img {
2721: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2722: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2723: undef,1);
2724: if (! $src &&
2725: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2726: ) {
2727: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2728: return '';
2729: }
2730: &Apache::lonxml::extlink($src);
2731: my $currentstring = '';
2732: my $scaling = .3;
2733:
2734: # Render unto browsers that which are the browser's...
2735:
2736: if ($target eq 'web' || $target eq 'webgrade') {
2737: if ($env{'browser.imagesuppress'} ne 'on') {
2738: my $enc = ('yes' eq
2739: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2740: $safeeval)));
2741: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2742: $enc);
2743: } else {
2744: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2745: undef,1);
2746: if (!$alttag) {
2747: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2748: $src);
2749: }
2750: $currentstring.='[IMAGE: '.$alttag.']';
2751: }
2752:
2753: # and render unto TeX that which is LaTeX
2754:
2755: } elsif ($target eq 'tex') {
2756: #
2757: # The alignment will require some superstructure to be put around
2758: # the \includegraphics stuff. At present we can only partially
2759: # simulate the alignments offered by html.
2760: #
2761: #
2762: my $align = lc(&Apache::lonxml::get_param('align',
2763: $parstack,
2764: $safeeval,
2765: undef,1));
2766: if(!$align) {
2767: $align = "bottom"; # This is html's default so it's ours too.
2768: }
2769: #
2770: &Apache::lonxml::debug("Alignemnt = $align");
2771: # LaTeX's image/text wrapping is really bad since it wants to
2772: # make figures float.
2773: # The user has the optional parameter (applicable only to l/r
2774: # alignment to use the picins/parpic directive to get wrapped text
2775: # this is also imperfect.. that's why we give them a choice...
2776: # so they can't yell at us for our choice.
2777: #
2778: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2779: $parstack,
2780: $safeeval,
2781: undef,0);
2782: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2783: if(!$latex_rendering) {
2784: $latex_rendering = "texwrap";
2785: }
2786: # using texwrap inside a table does not work. So, if after all of this,
2787: # texwrap is on, we turn it off if we detect we're in a table:
2788: #
2789: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2790: $latex_rendering = 'parpic';
2791: }
2792:
2793: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2794:
2795: #if original gif/jpg/png file exist do following:
2796: my $origsrc=$src;
2797: my ($path,$file) = &get_eps_image($src);
2798: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2799: &Apache::lonxml::debug("path = $path file = $file src = $src");
2800: if (-e $src) {
2801: &Apache::lonxml::debug("$src exists");
2802: my ($height_param,$width_param)=
2803: &image_size($origsrc,0.3,$parstack,$safeeval);
2804: my $destpath = $path;
2805: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2806: my $destfile = $file;
2807: $destfile =~ s/ /\_/g;
2808: my $size;
2809: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2810: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2811: $size='['.$size;
2812: $size=~s/,$/]/;
2813: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2814: .'\includegraphics'.$size.'{'.$destfile.'} ';
2815:
2816: # If there's an alignment specification we need to honor it here.
2817: # For the horizontal alignments, we will also honor the
2818: # value of the latex specfication. The default is parbox,
2819: # and that's used for illegal values too.
2820: #
2821: # Even though we set a default alignment value, the user
2822: # could have given us an illegal value. In that case we
2823: # just use the default alignment of bottom..
2824: if ($align eq "top") {
2825: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2826: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2827: my $offset = $height_param/2;
2828: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2829: } elsif ($align eq "left") {
2830: if ($latex_rendering eq "parpic") {
2831: $currentstring = '\parpic[l]{'.$currentstring.'}';
2832: } else { # wrapfig render
2833: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2834: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2835: }
2836: } elsif ($align eq "right") {
2837: if ($latex_rendering eq "parpic") {
2838: $currentstring = '\parpic[r]{'.$currentstring.'}';
2839: } else { # wrapfig rendering
2840: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2841: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2842:
2843: }
2844: } else { # Bottom is also default.
2845: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2846: }
2847: } else {
2848: &Apache::lonxml::debug("$src does not exist");
2849: #original image file doesn't exist so check the alt attribute
2850: my $alt =
2851: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2852: unless ($alt) {
2853: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2854: }
2855:
2856: if ($alt) { $currentstring .= ' '.$alt.' '; }
2857: }
2858:
2859: # And here's where the semi-quote breaks down: allow the user
2860: # to edit the beast as well by rendering the problem for edit:
2861: } elsif ($target eq 'edit') {
2862: $currentstring .=&Apache::edit::tag_start($target,$token);
2863: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2864: &Apache::edit::browse('src',undef,'alt').' '.
2865: &Apache::edit::search('src',undef,'alt').'<br />';
2866: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2867: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2868: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2869: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2870: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2871: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2872: ['','bottom','middle','top','left','right'],$token,5);
2873: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2874: ['', 'parbox', 'parpic'], $token, 2);
2875: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2876: ['no','yes'], $token, 2);
2877: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2878: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2879: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2880: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2881: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2882:
2883:
2884: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2885: if ($width) { $currentstring.=' width="'.$width.'" '; }
2886: if ($height) { $currentstring.=' height="'.$height.'" '; }
2887: $currentstring .= ' />';
2888: } elsif ($target eq 'modified') {
2889: my ($osrc,$owidth,$oheight)=
2890: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2891: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2892: $safeeval,'src','alt','align',
2893: 'TeXwidth','TeXheight', 'TeXwrap',
2894: 'width','height','encrypturl');
2895: my ($nsrc,$nwidth,$nheight)=
2896: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2897: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2898: &image_replication($loc);
2899: my ($iwidth,$iheight);
2900: if (-e $loc) {
2901: my $image = Image::Magick->new;
2902: $image->Read($loc);
2903: ($iwidth, $iheight) = ($image->Get('width'),
2904: $image->Get('height'));
2905: }
2906: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2907: # changed image or no size specified,
2908: # if they didn't explicitly change the
2909: # width or height use the ones from the image
2910: if ($iwidth && $iheight) {
2911: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2912: $token->[2]{'width'} = $iwidth;$ctag=1;
2913: }
2914: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2915: $token->[2]{'height'}=$iheight;$ctag=1;
2916: }
2917: }
2918: }
2919: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2920: # if we don't have a width or height
2921: if ($iwidth && $cwidth && !$cheight) {
2922: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2923: }
2924: if ($iheight && $cheight && !$cwidth) {
2925: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2926: }
2927: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2928: }
2929:
2930: return $currentstring;
2931: }
2932:
2933: sub end_img {
2934: my ($target,$token) = @_;
2935: my $currentstring = '';
2936: if ($target eq 'web' || $target eq 'webgrade') {
2937: $currentstring = $token->[2];
2938: } elsif ($target eq 'tex') {
2939: $currentstring = '';
2940: }
2941: return $currentstring;
2942: }
2943:
2944: #-- <applet> tag (end tag required)
2945: sub start_applet {
2946: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2947:
2948: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2949: &Apache::lonxml::extlink($code);
2950: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2951: undef,1);
2952: &Apache::lonxml::extlink($archive);
2953: my $currentstring = '';
2954: if ($target eq 'web' || $target eq 'webgrade') {
2955: if ($env{'browser.appletsuppress'} ne 'on') {
2956: $currentstring = &Apache::lonenc::encrypt_ref($token,
2957: {'code'=>$code,
2958: 'archive'=>$archive}
2959: );
2960: } else {
2961: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2962: $safeeval,undef,1);
2963: unless ($alttag) {
2964: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2965: $code);
2966: }
2967: $currentstring='[APPLET: '.$alttag.']';
2968: }
2969: } elsif ($target eq 'tex') {
2970: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2971: $safeeval,undef,1);
2972: unless ($alttag) {
2973: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2974: undef,1);
2975: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2976: $code);
2977: }
2978: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2979: '.}\end{center}';
2980: }
2981: return $currentstring;
2982: }
2983:
2984: sub end_applet {
2985: my ($target,$token) = @_;
2986: my $currentstring = '';
2987: if ($target eq 'web' || $target eq 'webgrade') {
2988: $currentstring = $token->[2];
2989: } elsif ($target eq 'tex') {
2990: }
2991: return $currentstring;
2992: }
2993:
2994: #-- <embed> tag (end tag optional/required)
2995: sub start_embed {
2996: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2997: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2998: &Apache::lonxml::extlink($src);
2999: my $currentstring = '';
3000: if ($target eq 'web' || $target eq 'webgrade') {
3001: if ($env{'browser.embedsuppress'} ne 'on') {
3002: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3003: } else {
3004: my $alttag=&Apache::lonxml::get_param
3005: ('alt',$parstack,$safeeval,undef,1);
3006: unless ($alttag) {
3007: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3008: }
3009: $currentstring='[EMBED: '.$alttag.']';
3010: }
3011: } elsif ($target eq 'tex') {
3012: }
3013: return $currentstring;
3014: }
3015:
3016: sub end_embed {
3017: my ($target,$token) = @_;
3018: my $currentstring = '';
3019: if ($target eq 'web' || $target eq 'webgrade') {
3020: $currentstring = $token->[2];
3021: } elsif ($target eq 'tex') {
3022: }
3023: return $currentstring;
3024: }
3025:
3026: #-- <param> tag (end tag forbidden)
3027: sub start_param {
3028: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3029: if (&Apache::lonxml::get_param('name',$parstack,
3030: $safeeval,undef,1)=~/^cabbase$/i) {
3031: my $value=&Apache::lonxml::get_param('value',$parstack,
3032: $safeeval,undef,1);
3033: &Apache::lonxml::extlink($value);
3034: }
3035:
3036: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3037: &Apache::lonxml::extlink($src);
3038: my $currentstring = '';
3039: if ($target eq 'web' || $target eq 'webgrade') {
3040: my %toconvert;
3041: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3042: if ($src) { $toconvert{'src'}= $src; }
3043: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3044: undef,1);
3045: if ($name=~/^cabbase$/i) {
3046: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3047: $safeeval,undef,1);
3048: }
3049: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3050: } elsif ($target eq 'tex') {
3051: }
3052: return $currentstring;
3053: }
3054:
3055: sub end_param {
3056: my ($target,$token) = @_;
3057: my $currentstring = '';
3058: if ($target eq 'web' || $target eq 'webgrade') {
3059: $currentstring = $token->[2];
3060: } elsif ($target eq 'tex') {
3061: }
3062: return $currentstring;
3063: }
3064:
3065: #-- <allow> tag
3066: sub start_allow {
3067: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3068: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3069: &Apache::lonxml::extlink($src);
3070:
3071: if ($target eq 'tex') { &image_replication($src); }
3072: my $result;
3073: if ($target eq 'edit') {
3074: $result .=&Apache::edit::tag_start($target,$token);
3075: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3076: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3077: } elsif ($target eq 'modified') {
3078: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3079: $safeeval,'src');
3080: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3081: }
3082: return $result;
3083: }
3084:
3085: sub end_allow {
3086: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3087: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3088: return '';
3089: }
3090:
3091: #-- Frames (end tag required)
3092: #-- <frameset>
3093: sub start_frameset {
3094: my ($target,$token) = @_;
3095: my $currentstring = ''; # Close any pending para.
3096: if ($target eq 'web' || $target eq 'webgrade') {
3097: $currentstring =
3098: &Apache::loncommon::start_page($Apache::londefdef::title,
3099: $Apache::londefdef::head,
3100: {'add_entries' => $token->[2],
3101: 'no_title' => 1,
3102: 'force_register' => 1,
3103: 'frameset' => 1,});
3104:
3105: }
3106: return $currentstring;
3107: }
3108:
3109: sub end_frameset {
3110: my ($target,$token) = @_;
3111: my $currentstring = '';
3112: if ($target eq 'web' || $target eq 'webgrade') {
3113: $currentstring = $token->[2];
3114: }
3115: return $currentstring;
3116: }
3117:
3118: #-- <xmp> (end tag required)
3119: sub start_xmp {
3120: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3121: my $currentstring = '';
3122: if ($target eq 'web' || $target eq 'webgrade') {
3123: $currentstring .= $token->[4];
3124: } elsif ($target eq 'tex') {
3125: $currentstring .= '\begin{verbatim}';
3126: }
3127: return $currentstring;
3128: }
3129:
3130: sub end_xmp {
3131: my ($target,$token) = @_;
3132: my $currentstring = '';
3133: if ($target eq 'web' || $target eq 'webgrade') {
3134: $currentstring .= $token->[2];
3135: } elsif ($target eq 'tex') {
3136: $currentstring .= '\end{verbatim}';
3137: }
3138: return $currentstring;
3139: }
3140:
3141: #-- <pre> (end tag required)
3142: sub start_pre {
3143: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3144: my $currentstring = &end_p(); # close off pending <p>
3145: if ($target eq 'web' || $target eq 'webgrade') {
3146: $currentstring .= $token->[4];
3147: } elsif ($target eq 'tex') {
3148: $currentstring .= '\begin{verbatim}';
3149: &Apache::lonxml::disable_LaTeX_substitutions();
3150: }
3151: return $currentstring;
3152: }
3153:
3154: sub end_pre {
3155: my ($target,$token) = @_;
3156: my $currentstring = '';
3157: if ($target eq 'web' || $target eq 'webgrade') {
3158: $currentstring .= $token->[2];
3159: } elsif ($target eq 'tex') {
3160: $currentstring .= '\end{verbatim}';
3161: &Apache::lonxml::enable_LaTeX_substitutions();
3162: }
3163: return $currentstring;
3164: }
3165:
3166: #-- <insert>
3167: sub start_insert {
3168: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3169: my $currentstring = '';
3170: if ($target eq 'web' || $target eq 'webgrade') {
3171: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3172: $currentstring .= '<b>'.$display.'</b>';;
3173: }
3174: return $currentstring;
3175: }
3176:
3177: sub end_insert {
3178: my ($target,$token) = @_;
3179: my $currentstring = '';
3180: if ($target eq 'web' || $target eq 'webgrade') {
3181: $currentstring .= '';
3182: }
3183: return $currentstring;
3184: }
3185:
3186: #-- <externallink>
3187: sub start_externallink {
3188: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3189: my $currentstring = '';
3190: if ($target eq 'web' || $target eq 'webgrade') {
3191: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3192: $currentstring .= '<b>'.$display.'</b>';;
3193: }
3194: return $currentstring;
3195: }
3196:
3197: sub end_externallink {
3198: my ($target,$token) = @_;
3199: my $currentstring = '';
3200: if ($target eq 'web' || $target eq 'webgrade') {
3201: $currentstring .= '';
3202: }
3203: return $currentstring;
3204: }
3205:
3206: #-- <blankspace heigth="">
3207: sub start_blankspace {
3208: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3209: my $currentstring = &end_p(); # closes off any unclosed <p>
3210: if ($target eq 'tex') {
3211: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3212: $currentstring .= '\vskip '.$howmuch.' ';
3213: }
3214: return $currentstring;
3215: }
3216:
3217: sub end_blankspace {
3218: my ($target,$token) = @_;
3219: my $currentstring = '';
3220: if ($target eq 'tex') {
3221: $currentstring .= '';
3222: }
3223: return $currentstring;
3224: }
3225:
3226: #-- <abbr> tag (end tag required)
3227: sub start_abbr {
3228: my ($target,$token) = @_;
3229: my $currentstring = '';
3230: if ($target eq 'web' || $target eq 'webgrade') {
3231: $currentstring = $token->[4];
3232: }
3233: return $currentstring;
3234: }
3235:
3236: sub end_abbr {
3237: my ($target,$token) = @_;
3238: my $currentstring = '';
3239: if ($target eq 'web' || $target eq 'webgrade') {
3240: $currentstring = $token->[2];
3241: }
3242: return $currentstring;
3243: }
3244:
3245: #-- <acronym> tag (end tag required)
3246: sub start_acronym {
3247: my ($target,$token) = @_;
3248: my $currentstring = '';
3249: if ($target eq 'web' || $target eq 'webgrade') {
3250: $currentstring = $token->[4];
3251: }
3252: return $currentstring;
3253: }
3254:
3255: sub end_acronym {
3256: my ($target,$token) = @_;
3257: my $currentstring = '';
3258: if ($target eq 'web' || $target eq 'webgrade') {
3259: $currentstring = $token->[2];
3260: }
3261: return $currentstring;
3262: }
3263:
3264: #-- <area> tag (end tag forbidden)
3265: sub start_area {
3266: my ($target,$token) = @_;
3267: my $currentstring = '';
3268: if ($target eq 'web' || $target eq 'webgrade') {
3269: $currentstring = $token->[4];
3270: }
3271: return $currentstring;
3272: }
3273:
3274: sub end_area {
3275: my ($target,$token) = @_;
3276: my $currentstring = '';
3277: if ($target eq 'web' || $target eq 'webgrade') {
3278: $currentstring = $token->[2];
3279: }
3280: return $currentstring;
3281: }
3282:
3283: #-- <base> tag (end tag forbidden)
3284: sub start_base {
3285: my ($target,$token) = @_;
3286: my $currentstring = '';
3287: if ($target eq 'web' || $target eq 'webgrade') {
3288: $currentstring = $token->[4];
3289: }
3290: return $currentstring;
3291: }
3292:
3293: sub end_base {
3294: my ($target,$token) = @_;
3295: my $currentstring = '';
3296: if ($target eq 'web' || $target eq 'webgrade') {
3297: $currentstring = $token->[2];
3298: }
3299: return $currentstring;
3300: }
3301:
3302: #-- <bdo> tag (end tag required)
3303: sub start_bdo {
3304: my ($target,$token) = @_;
3305: my $currentstring = '';
3306: if ($target eq 'web' || $target eq 'webgrade') {
3307: $currentstring = $token->[4];
3308: }
3309: return $currentstring;
3310: }
3311:
3312: sub end_bdo {
3313: my ($target,$token) = @_;
3314: my $currentstring = '';
3315: if ($target eq 'web' || $target eq 'webgrade') {
3316: $currentstring = $token->[2];
3317: }
3318: return $currentstring;
3319: }
3320:
3321: #-- <bgsound> tag (end tag optional)
3322: sub start_bgsound {
3323: my ($target,$token) = @_;
3324: my $currentstring = '';
3325: if ($target eq 'web' || $target eq 'webgrade') {
3326: $currentstring = $token->[4];
3327: }
3328: return $currentstring;
3329: }
3330:
3331: sub end_bgsound {
3332: my ($target,$token) = @_;
3333: my $currentstring = '';
3334: if ($target eq 'web' || $target eq 'webgrade') {
3335: $currentstring = $token->[2];
3336: }
3337: return $currentstring;
3338: }
3339:
3340: #-- <blink> tag (end tag required)
3341: sub start_blink {
3342: my ($target,$token) = @_;
3343: my $currentstring = '';
3344: if ($target eq 'web' || $target eq 'webgrade') {
3345: $currentstring = $token->[4];
3346: }
3347: return $currentstring;
3348: }
3349:
3350: sub end_blink {
3351: my ($target,$token) = @_;
3352: my $currentstring = '';
3353: if ($target eq 'web' || $target eq 'webgrade') {
3354: $currentstring = $token->[2];
3355: }
3356: return $currentstring;
3357: }
3358:
3359: #-- <blockquote> tag (end tag required)
3360: sub start_blockquote {
3361: my ($target,$token) = @_;
3362: my $currentstring = &end_p(); # Close any unclosed <p>
3363: if ($target eq 'web' || $target eq 'webgrade') {
3364: $currentstring .= $token->[4];
3365: }
3366: return $currentstring;
3367: }
3368:
3369: sub end_blockquote {
3370: my ($target,$token) = @_;
3371: my $currentstring = '';
3372: if ($target eq 'web' || $target eq 'webgrade') {
3373: $currentstring = $token->[2];
3374: }
3375: return $currentstring;
3376: }
3377:
3378: #-- <button> tag (end tag required)
3379: sub start_button {
3380: my ($target,$token) = @_;
3381: my $currentstring = '';
3382: if ($target eq 'web' || $target eq 'webgrade') {
3383: $currentstring = $token->[4];
3384: }
3385: return $currentstring;
3386: }
3387:
3388: sub end_button {
3389: my ($target,$token) = @_;
3390: my $currentstring = '';
3391: if ($target eq 'web' || $target eq 'webgrade') {
3392: $currentstring = $token->[2];
3393: }
3394: return $currentstring;
3395: }
3396:
3397: #-- <caption> tag (end tag required)
3398: sub start_caption {
3399: my ($target,$token) = @_;
3400: my $currentstring = '';
3401: if ($target eq 'web' || $target eq 'webgrade') {
3402: $currentstring = $token->[4];
3403: }
3404: return $currentstring;
3405: }
3406:
3407: sub end_caption {
3408: my ($target,$token) = @_;
3409: my $currentstring = '';
3410: if ($target eq 'web' || $target eq 'webgrade') {
3411: $currentstring = $token->[2];
3412: }
3413: return $currentstring;
3414: }
3415:
3416: #-- <col> tag (end tag forbdden)
3417: sub start_col {
3418: my ($target,$token) = @_;
3419: my $currentstring = '';
3420: if ($target eq 'web' || $target eq 'webgrade') {
3421: $currentstring = $token->[4];
3422: }
3423: return $currentstring;
3424: }
3425:
3426: sub end_col {
3427: my ($target,$token) = @_;
3428: my $currentstring = '';
3429: if ($target eq 'web' || $target eq 'webgrade') {
3430: $currentstring = $token->[2];
3431: }
3432: return $currentstring;
3433: }
3434:
3435: #-- <colgroup> tag (end tag optional)
3436: sub start_colgroup {
3437: my ($target,$token) = @_;
3438: my $currentstring = '';
3439: if ($target eq 'web' || $target eq 'webgrade') {
3440: $currentstring = $token->[4];
3441: }
3442: return $currentstring;
3443: }
3444:
3445: sub end_colgroup {
3446: my ($target,$token) = @_;
3447: my $currentstring = '';
3448: if ($target eq 'web' || $target eq 'webgrade') {
3449: $currentstring = $token->[2];
3450: }
3451: return $currentstring;
3452: }
3453:
3454: #-- <del> tag (end tag required)
3455: sub start_del {
3456: my ($target,$token) = @_;
3457: my $currentstring = '';
3458: if ($target eq 'web' || $target eq 'webgrade') {
3459: $currentstring = $token->[4];
3460: }
3461: return $currentstring;
3462: }
3463:
3464: sub end_del {
3465: my ($target,$token) = @_;
3466: my $currentstring = '';
3467: if ($target eq 'web' || $target eq 'webgrade') {
3468: $currentstring = $token->[2];
3469: }
3470: return $currentstring;
3471: }
3472:
3473: #-- <fieldset> tag (end tag required)
3474: sub start_fieldset {
3475: my ($target,$token) = @_;
3476: my $currentstring = '';
3477: if ($target eq 'web' || $target eq 'webgrade') {
3478: $currentstring = $token->[4];
3479: }
3480: return $currentstring;
3481: }
3482:
3483: sub end_fieldset {
3484: my ($target,$token) = @_;
3485: my $currentstring = '';
3486: if ($target eq 'web' || $target eq 'webgrade') {
3487: $currentstring = $token->[2];
3488: }
3489: return $currentstring;
3490: }
3491:
3492: #-- <frame> tag (end tag forbidden)
3493: sub start_frame {
3494: my ($target,$token) = @_;
3495: my $currentstring = '';
3496: if ($target eq 'web' || $target eq 'webgrade') {
3497: $currentstring = $token->[4];
3498: }
3499: return $currentstring;
3500: }
3501:
3502: sub end_frame {
3503: my ($target,$token) = @_;
3504: my $currentstring = '';
3505: if ($target eq 'web' || $target eq 'webgrade') {
3506: $currentstring = $token->[2];
3507: }
3508: return $currentstring;
3509: }
3510:
3511: #-- <iframe> tag (end tag required)
3512: sub start_iframe {
3513: my ($target,$token) = @_;
3514: my $currentstring = '';
3515: if ($target eq 'web' || $target eq 'webgrade') {
3516: $currentstring = $token->[4];
3517: }
3518: return $currentstring;
3519: }
3520:
3521: sub end_iframe {
3522: my ($target,$token) = @_;
3523: my $currentstring = '';
3524: if ($target eq 'web' || $target eq 'webgrade') {
3525: $currentstring = $token->[2];
3526: }
3527: return $currentstring;
3528: }
3529:
3530: #-- <ins> tag (end tag required)
3531: sub start_ins {
3532: my ($target,$token) = @_;
3533: my $currentstring = '';
3534: if ($target eq 'web' || $target eq 'webgrade') {
3535: $currentstring = $token->[4];
3536: }
3537: return $currentstring;
3538: }
3539:
3540: sub end_ins {
3541: my ($target,$token) = @_;
3542: my $currentstring = '';
3543: if ($target eq 'web' || $target eq 'webgrade') {
3544: $currentstring = $token->[2];
3545: }
3546: return $currentstring;
3547: }
3548:
3549: #-- <isindex> tag (end tag forbidden)
3550: sub start_isindex {
3551: my ($target,$token) = @_;
3552: my $currentstring = '';
3553: if ($target eq 'web' || $target eq 'webgrade') {
3554: $currentstring = $token->[4];
3555: }
3556: return $currentstring;
3557: }
3558:
3559: sub end_isindex {
3560: my ($target,$token) = @_;
3561: my $currentstring = '';
3562: if ($target eq 'web' || $target eq 'webgrade') {
3563: $currentstring = $token->[2];
3564: }
3565: return $currentstring;
3566: }
3567:
3568: #-- <keygen> tag (end tag forbidden)
3569: sub start_keygen {
3570: my ($target,$token) = @_;
3571: my $currentstring = '';
3572: if ($target eq 'web' || $target eq 'webgrade') {
3573: $currentstring = $token->[4];
3574: }
3575: return $currentstring;
3576: }
3577:
3578: sub end_keygen {
3579: my ($target,$token) = @_;
3580: my $currentstring = '';
3581: if ($target eq 'web' || $target eq 'webgrade') {
3582: $currentstring = $token->[2];
3583: }
3584: return $currentstring;
3585: }
3586:
3587: #-- <label> tag
3588: sub start_label {
3589: my ($target,$token) = @_;
3590: my $currentstring = '';
3591: if ($target eq 'web' || $target eq 'webgrade') {
3592: $currentstring = $token->[4];
3593: }
3594: return $currentstring;
3595: }
3596:
3597: sub end_label {
3598: my ($target,$token) = @_;
3599: my $currentstring = '';
3600: if ($target eq 'web' || $target eq 'webgrade') {
3601: $currentstring = $token->[2];
3602: }
3603: return $currentstring;
3604: }
3605:
3606: #-- <layer> tag (end tag required)
3607: sub start_layer {
3608: my ($target,$token) = @_;
3609: my $currentstring = '';
3610: if ($target eq 'web' || $target eq 'webgrade') {
3611: $currentstring = $token->[4];
3612: }
3613: return $currentstring;
3614: }
3615:
3616: sub end_layer {
3617: my ($target,$token) = @_;
3618: my $currentstring = '';
3619: if ($target eq 'web' || $target eq 'webgrade') {
3620: $currentstring = $token->[2];
3621: }
3622: return $currentstring;
3623: }
3624:
3625: #-- <legend> tag (end tag required)
3626: sub start_legend {
3627: my ($target,$token) = @_;
3628: my $currentstring = '';
3629: if ($target eq 'web' || $target eq 'webgrade') {
3630: $currentstring = $token->[4];
3631: }
3632: return $currentstring;
3633: }
3634:
3635: sub end_legend {
3636: my ($target,$token) = @_;
3637: my $currentstring = '';
3638: if ($target eq 'web' || $target eq 'webgrade') {
3639: $currentstring = $token->[2];
3640: }
3641: return $currentstring;
3642: }
3643:
3644: #-- <link> tag (end tag forbidden)
3645: sub start_link {
3646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3647: my $currentstring = '';
3648: if ($target eq 'web' || $target eq 'webgrade') {
3649: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3650: undef,1);
3651: &Apache::lonxml::extlink($href);
3652: $currentstring = $token->[4];
3653: }
3654: return $currentstring;
3655: }
3656:
3657: sub end_link {
3658: my ($target,$token) = @_;
3659: my $currentstring = '';
3660: if ($target eq 'web' || $target eq 'webgrade') {
3661: $currentstring = $token->[2];
3662: }
3663: return $currentstring;
3664: }
3665:
3666: #-- <marquee> tag (end tag optional)
3667: sub start_marquee {
3668: my ($target,$token) = @_;
3669: my $currentstring = '';
3670: if ($target eq 'web' || $target eq 'webgrade') {
3671: $currentstring = $token->[4];
3672: }
3673: return $currentstring;
3674: }
3675:
3676: sub end_marquee {
3677: my ($target,$token) = @_;
3678: my $currentstring = '';
3679: if ($target eq 'web' || $target eq 'webgrade') {
3680: $currentstring = $token->[2];
3681: }
3682: return $currentstring;
3683: }
3684:
3685: #-- <multicol> tag (end tag required)
3686: sub start_multicol {
3687: my ($target,$token) = @_;
3688: my $currentstring = &end_p(); # Close any pending <p>
3689: if ($target eq 'web' || $target eq 'webgrade') {
3690: $currentstring .= $token->[4];
3691: }
3692: return $currentstring;
3693: }
3694:
3695: sub end_multicol {
3696: my ($target,$token) = @_;
3697: my $currentstring = '';
3698: if ($target eq 'web' || $target eq 'webgrade') {
3699: $currentstring = $token->[2];
3700: }
3701: return $currentstring;
3702: }
3703:
3704: #-- <nobr> tag (end tag required)
3705: sub start_nobr {
3706: my ($target,$token) = @_;
3707: my $currentstring = '';
3708: if ($target eq 'web' || $target eq 'webgrade') {
3709: $currentstring = $token->[4];
3710: } elsif ($target eq 'tex') {
3711: $currentstring='\mbox{';
3712: }
3713: return $currentstring;
3714: }
3715:
3716: sub end_nobr {
3717: my ($target,$token) = @_;
3718: my $currentstring = '';
3719: if ($target eq 'web' || $target eq 'webgrade') {
3720: $currentstring = $token->[2];
3721: } elsif ($target eq 'tex') {
3722: $currentstring='}';
3723: }
3724: return $currentstring;
3725: }
3726:
3727: #-- <noembed> tag (end tag required)
3728: sub start_noembed {
3729: my ($target,$token) = @_;
3730: my $currentstring = '';
3731: if ($target eq 'web' || $target eq 'webgrade') {
3732: $currentstring = $token->[4];
3733: }
3734: return $currentstring;
3735: }
3736:
3737: sub end_noembed {
3738: my ($target,$token) = @_;
3739: my $currentstring = '';
3740: if ($target eq 'web' || $target eq 'webgrade') {
3741: $currentstring = $token->[2];
3742: }
3743: return $currentstring;
3744: }
3745:
3746: #-- <noframes> tag (end tag required)
3747: sub start_noframes {
3748: my ($target,$token) = @_;
3749: my $currentstring = '';
3750: if ($target eq 'web' || $target eq 'webgrade') {
3751: $currentstring = $token->[4];
3752: }
3753: return $currentstring;
3754: }
3755:
3756: sub end_noframes {
3757: my ($target,$token) = @_;
3758: my $currentstring = '';
3759: if ($target eq 'web' || $target eq 'webgrade') {
3760: $currentstring = $token->[2];
3761: }
3762: return $currentstring;
3763: }
3764:
3765: #-- <nolayer> tag (end tag required)
3766: sub start_nolayer {
3767: my ($target,$token) = @_;
3768: my $currentstring = '';
3769: if ($target eq 'web' || $target eq 'webgrade') {
3770: $currentstring = $token->[4];
3771: }
3772: return $currentstring;
3773: }
3774:
3775: sub end_nolayer {
3776: my ($target,$token) = @_;
3777: my $currentstring = '';
3778: if ($target eq 'web' || $target eq 'webgrade') {
3779: $currentstring = $token->[2];
3780: }
3781: return $currentstring;
3782: }
3783:
3784: #-- <noscript> tag (end tag required)
3785: sub start_noscript {
3786: my ($target,$token) = @_;
3787: my $currentstring = '';
3788: if ($target eq 'web' || $target eq 'webgrade') {
3789: $currentstring = $token->[4];
3790: }
3791: return $currentstring;
3792: }
3793:
3794: sub end_noscript {
3795: my ($target,$token) = @_;
3796: my $currentstring = '';
3797: if ($target eq 'web' || $target eq 'webgrade') {
3798: $currentstring = $token->[2];
3799: }
3800: return $currentstring;
3801: }
3802:
3803: #-- <object> tag (end tag required)
3804: sub start_object {
3805: my ($target,$token) = @_;
3806: my $currentstring = '';
3807: if ($target eq 'web' || $target eq 'webgrade') {
3808: $currentstring = $token->[4];
3809: }
3810: return $currentstring;
3811: }
3812:
3813: sub end_object {
3814: my ($target,$token) = @_;
3815: my $currentstring = '';
3816: if ($target eq 'web' || $target eq 'webgrade') {
3817: $currentstring = $token->[2];
3818: }
3819: return $currentstring;
3820: }
3821:
3822: #-- <optgroup> tag (end tag required)
3823: sub start_optgroup {
3824: my ($target,$token) = @_;
3825: my $currentstring = '';
3826: if ($target eq 'web' || $target eq 'webgrade') {
3827: $currentstring = $token->[4];
3828: }
3829: return $currentstring;
3830: }
3831:
3832: sub end_optgroup {
3833: my ($target,$token) = @_;
3834: my $currentstring = '';
3835: if ($target eq 'web' || $target eq 'webgrade') {
3836: $currentstring = $token->[2];
3837: }
3838: return $currentstring;
3839: }
3840:
3841: #-- <samp> tag (end tag required)
3842: sub start_samp {
3843: my ($target,$token) = @_;
3844: my $currentstring = '';
3845: if ($target eq 'web' || $target eq 'webgrade') {
3846: $currentstring = $token->[4];
3847: } elsif ($target eq 'tex') {
3848: $currentstring='\texttt{';
3849: }
3850: return $currentstring;
3851: }
3852:
3853: sub end_samp {
3854: my ($target,$token) = @_;
3855: my $currentstring = '';
3856: if ($target eq 'web' || $target eq 'webgrade') {
3857: $currentstring = $token->[2];
3858: } elsif ($target eq 'tex') {
3859: $currentstring='}';
3860: }
3861: return $currentstring;
3862: }
3863:
3864: #-- <server> tag
3865: sub start_server {
3866: my ($target,$token) = @_;
3867: my $currentstring = '';
3868: if ($target eq 'web' || $target eq 'webgrade') {
3869: $currentstring = $token->[4];
3870: }
3871: return $currentstring;
3872: }
3873:
3874: sub end_server {
3875: my ($target,$token) = @_;
3876: my $currentstring = '';
3877: if ($target eq 'web' || $target eq 'webgrade') {
3878: $currentstring = $token->[2];
3879: }
3880: return $currentstring;
3881: }
3882:
3883: #-- <spacer> tag (end tag forbidden)
3884: sub start_spacer {
3885: my ($target,$token) = @_;
3886: my $currentstring = &end_p(); # Close off any open <p> tag.
3887: if ($target eq 'web' || $target eq 'webgrade') {
3888: $currentstring .= $token->[4];
3889: }
3890: return $currentstring;
3891: }
3892:
3893: sub end_spacer {
3894: my ($target,$token) = @_;
3895: my $currentstring = '';
3896: if ($target eq 'web' || $target eq 'webgrade') {
3897: $currentstring = $token->[2];
3898: }
3899: return $currentstring;
3900: }
3901:
3902: #-- <span> tag (end tag required)
3903: sub start_span {
3904: my ($target,$token) = @_;
3905: my $currentstring = '';
3906: if ($target eq 'web' || $target eq 'webgrade') {
3907: $currentstring = $token->[4];
3908: }
3909: return $currentstring;
3910: }
3911:
3912: sub end_span {
3913: my ($target,$token) = @_;
3914: my $currentstring = '';
3915: if ($target eq 'web' || $target eq 'webgrade') {
3916: $currentstring = $token->[2];
3917: }
3918: return $currentstring;
3919: }
3920:
3921: #-- <tbody> tag (end tag optional)
3922: sub start_tbody {
3923: my ($target,$token) = @_;
3924: my $currentstring = '';
3925: if ($target eq 'web' || $target eq 'webgrade') {
3926: $currentstring = $token->[4];
3927: }
3928: return $currentstring;
3929: }
3930:
3931: sub end_tbody {
3932: my ($target,$token) = @_;
3933: my $currentstring = '';
3934: if ($target eq 'web' || $target eq 'webgrade') {
3935: $currentstring = $token->[2];
3936: }
3937: return $currentstring;
3938: }
3939:
3940: #-- <tfoot> tag (end tag optional)
3941: sub start_tfoot {
3942: my ($target,$token) = @_;
3943: my $currentstring = '';
3944: if ($target eq 'web' || $target eq 'webgrade') {
3945: $currentstring = $token->[4];
3946: }
3947: return $currentstring;
3948: }
3949:
3950: sub end_tfoot {
3951: my ($target,$token) = @_;
3952: my $currentstring = '';
3953: if ($target eq 'web' || $target eq 'webgrade') {
3954: $currentstring = $token->[2];
3955: }
3956: return $currentstring;
3957: }
3958:
3959: #-- <thead> tag (end tag optional)
3960: sub start_thead {
3961: my ($target,$token) = @_;
3962: my $currentstring = '';
3963: if ($target eq 'web' || $target eq 'webgrade') {
3964: $currentstring = $token->[4];
3965: }
3966: return $currentstring;
3967: }
3968:
3969: sub end_thead {
3970: my ($target,$token) = @_;
3971: my $currentstring = '';
3972: if ($target eq 'web' || $target eq 'webgrade') {
3973: $currentstring = $token->[2];
3974: }
3975: return $currentstring;
3976: }
3977:
3978: #-- <var> tag
3979: sub start_var {
3980: my ($target,$token) = @_;
3981: my $currentstring = '';
3982: if ($target eq 'web' || $target eq 'webgrade') {
3983: $currentstring = $token->[4];
3984: } elsif ($target eq 'tex') {
3985: $currentstring = '\textit{';
3986: }
3987: return $currentstring;
3988: }
3989:
3990: sub end_var {
3991: my ($target,$token) = @_;
3992: my $currentstring = '';
3993: if ($target eq 'web' || $target eq 'webgrade') {
3994: $currentstring = $token->[2];
3995: } elsif ($target eq 'tex') {
3996: $currentstring = '}';
3997: }
3998: return $currentstring;
3999: }
4000:
4001: #-- <wbr> tag (end tag forbidden)
4002: sub start_wbr {
4003: my ($target,$token) = @_;
4004: my $currentstring = '';
4005: if ($target eq 'web' || $target eq 'webgrade') {
4006: $currentstring = $token->[4];
4007: }
4008: return $currentstring;
4009: }
4010:
4011: sub end_wbr {
4012: my ($target,$token) = @_;
4013: my $currentstring = '';
4014: if ($target eq 'web' || $target eq 'webgrade') {
4015: $currentstring = $token->[2];
4016: }
4017: return $currentstring;
4018: }
4019:
4020: #-- <hideweboutput> tag
4021: sub start_hideweboutput {
4022: my ($target,$token) = @_;
4023: if ($target eq 'web' || $target eq 'webgrade') {
4024: &Apache::lonxml::startredirection();
4025: }
4026: return '';
4027: }
4028:
4029: sub end_hideweboutput {
4030: my ($target,$token) = @_;
4031: my $currentstring = '';
4032: if ($target eq 'web' || $target eq 'webgrade') {
4033: $currentstring = &Apache::lonxml::endredirection();
4034: }
4035: return '';
4036: }
4037:
4038:
4039: sub image_replication {
4040: my $src = shift;
4041: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4042: #replicates eps or ps
4043: my $epssrc = my $pssrc = $src;
4044: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4045: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4046: if (not -e $epssrc && not -e $pssrc) {
4047: my $result=&Apache::lonnet::repcopy($epssrc);
4048: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4049: }
4050: return '';
4051: }
4052: #
4053: # Get correct sizing parameter for an image given
4054: # it's initial ht. and wid. This allows sizing of
4055: # images that are generated on-the-fly (e.g. gnuplot)
4056: # as well as serving as a utility for image_size.
4057: #
4058: # Parameter:
4059: # height_param
4060: # width_param - Initial picture dimensions.
4061: # scaling - A scale factor.
4062: # parstack, - the current stack of tag attributes
4063: # from the xml parser
4064: # safeeval, - pointer to the safespace
4065: # depth, - from what level in the stack to look for attributes
4066: # (assumes -1 if unspecified)
4067: # cis - look for attrubutes case insensitively
4068: # (assumes false)
4069: #
4070: # Returns:
4071: # height, width - new dimensions.
4072: #
4073: sub resize_image {
4074: my ($height_param, $width_param, $scaling,
4075: $parstack, $safeeval, $depth, $cis) = @_;
4076:
4077: # First apply the scaling...
4078:
4079: $height_param = $height_param * $scaling;
4080: $width_param = $width_param * $scaling;
4081:
4082: #do we have any specified LaTeX size of the picture?
4083: my $toget='TeXwidth';
4084: if ($cis) {
4085: $toget=lc($toget);
4086: }
4087: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4088: $safeeval,$depth,$cis);
4089: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4090: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4091: $safeeval,$depth,$cis);
4092: #do we have any specified web size of the picture?
4093: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4094: $depth,1);
4095: if ($TeXwidth) {
4096: my $old_width_param=$width_param;
4097: if ($TeXwidth=~/(\d+)\s*\%/) {
4098: $width_param = $1*$env{'form.textwidth'}/100;
4099: } else {
4100: $width_param = $TeXwidth;
4101: }
4102: if ($TeXheight) {
4103: $height_param = $TeXheight;
4104: } elsif ($old_width_param) {
4105: $height_param=$TeXwidth/$old_width_param*$height_param;
4106: }
4107: } elsif ($TeXheight) {
4108: $height_param = $TeXheight;
4109: if ($height_param) {
4110: $width_param = $TeXheight/$height_param*$width_param;
4111: }
4112: } elsif ($width) {
4113: my $old_width_param=$width_param;
4114: $width_param = $width*$scaling;
4115: if ($old_width_param) {
4116: $height_param=$width_param/$old_width_param*$height_param;
4117: }
4118: }
4119: if ($width_param > $env{'form.textwidth'}) {
4120: my $old_width_param=$width_param;
4121: $width_param =0.95*$env{'form.textwidth'};
4122: if ($old_width_param) {
4123: $height_param=$width_param/$old_width_param*$height_param;
4124: }
4125: }
4126:
4127: return ($height_param, $width_param);
4128: }
4129:
4130: sub image_size {
4131: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4132:
4133: #size of image from gif/jpg/jpeg/png
4134: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4135: if (-e $ressrc) {
4136: $src = $ressrc;
4137: }
4138: my $image = Image::Magick->new;
4139: my $current_figure = $image->Read($src);
4140: my $width_param = $image->Get('width');
4141: my $height_param = $image->Get('height');
4142: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4143: undef($image);
4144:
4145: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4146: $scaling, $parstack, $safeeval,
4147: $depth, $cis);
4148:
4149: return ($height_param, $width_param);
4150: }
4151:
4152: sub image_width {
4153: my ($height, $width) = &image_size(@_);
4154: return $width;
4155: }
4156: # Not yet 100% sure this is correct in all circumstances..
4157: # due to my uncertainty about mods to image_size.
4158: #
4159: sub image_height {
4160: my ($height, $width) = &image_size(@_);
4161: return $height;
4162: }
4163:
4164: sub get_eps_image {
4165: my ($src)=@_;
4166: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4167:
4168: # In order to prevent the substitution of the alt text, we need to
4169: # be sure the orig_src file is on system now so:
4170:
4171: if (! -e $orig_src) {
4172: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4173: }
4174: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4175: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4176: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4177: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4178: &Apache::lonxml::debug("Filelocation gives: $src");
4179: if (! -e $src) {
4180: &Apache::lonxml::debug("$src does not exist");
4181: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4182: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4183: #if replication failed try to find ps file
4184: $src=~s/\.eps$/\.ps/;
4185: &Apache::lonxml::debug("Now looking for $src");
4186: #if no ps file try to replicate it.
4187: my $didrepcopy = &Apache::lonnet::repcopy($src);
4188: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4189: if ( (not -e $src) ||
4190: ($didrepcopy ne 'ok')) {
4191: &Apache::lonxml::debug("Failed to find or replicate $src");
4192:
4193: #if replication failed try to produce eps file dynamically
4194: $src=~s/\.ps$/\.eps/;
4195: my $temp_file;
4196: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4197: my $newsrc=$orig_src;
4198: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4199: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4200: print FILE "$newsrc\n";
4201: close FILE;
4202: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4203: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4204: if ($sext ne "") { # Put the ext. back in to uniquify.
4205: $src =~ s/\.eps$/$sext.eps/;
4206: }
4207: }
4208: }
4209: }
4210: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4211: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4212: return ($path.'/',$file);
4213: }
4214:
4215: sub eps_generation {
4216: my ($src,$file,$width_param) = @_;
4217: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4218: my $temp_file = Apache::File->new('>>'.$filename);
4219: print $temp_file "$src\n";
4220: my $newsrc = $src;
4221: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4222: $newsrc=~s/\/home\/httpd\/html\/res//;
4223: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4224: $newsrc=~s/\/\.\//\//;
4225: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4226: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4227: $newsrc=~s/\/home\/httpd\/lonUsers//;
4228: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4229: }
4230: if ($newsrc=~/\/userfiles\//) {
4231: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4232: } else {
4233: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4234: }
4235: }
4236:
4237: sub file_path {
4238: my $src=shift;
4239: my ($file,$path);
4240: if ($src =~ m!(.*)/([^/]*)$!) {
4241: $file = $2;
4242: $path = $1.'/';
4243: }
4244: return $file,$path;
4245: }
4246: # Converts a measurement in to mm from any of
4247: # the other valid LaTeX units of measure.
4248: # If the units of measure are missing from the
4249: # parameter, it is assumed to be in and returned
4250: # with mm units of measure
4251: sub recalc {
4252: my $argument = shift;
4253: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4254: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4255: my $value=$1;
4256: my $units=$2;
4257: if ($units eq 'cm') {
4258: $value*=10;
4259: } elsif ($units eq 'in') {
4260: $value*=25.4;
4261: } elsif ($units eq 'pc') {
4262: $value*=(25.4*12/72.27);
4263: } elsif ($units eq 'pt') {
4264: $value*=(25.4/72.27);
4265: }
4266: return $value.' mm';
4267: }
4268:
4269: sub LATEX_length {
4270: my $garbage=shift;
4271: $garbage=~s/^\s+$//;
4272: $garbage=~s/^\s+(\S.*)/$1/;#space before
4273: $garbage=~s/(.*\S)\s+$/$1/;#space after
4274: $garbage=~s/(\s)+/$1/;#only one space
4275: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4276: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4277: $garbage=~s/([^\\])\$/$1/g;#$
4278: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4279: $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;
4280: $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;
4281: $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;
4282: $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;
4283: $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;
4284: $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;
4285: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4286: #remove some other LaTeX command
4287: $garbage=~s|\\(\w+)\\|\\|g;
4288: $garbage=~s|\\(\w+)(\s*)|$2|g;
4289: $garbage=~s|\+|11|g;
4290: my $value=length($garbage);
4291: return $value;
4292: }
4293:
4294:
4295: # is_inside_of $tagstack $tag
4296: # This sub returns true if the current state of Xml processing
4297: # is inside of the tag.
4298: # Parameters:
4299: # tagstack - The tagstack from the parser.
4300: # tag - The tag (without the <>'s.).
4301: # Sample usage:
4302: # if (is_inside_of($tagstack "table")) {
4303: # # I'm in a table....
4304: # }
4305: sub is_inside_of {
4306: my ($tagstack, $tag) = @_;
4307: my @stack = @$tagstack;
4308: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4309: if ($stack[$i] eq $tag) {
4310: return 1;
4311: }
4312: }
4313: return 0;
4314: }
4315:
4316:
4317: 1;
4318: __END__
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