1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.333 2006/08/16 20:14:24 albertel Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: # use Data::Dumper;
52:
53: BEGIN {
54:
55: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
56:
57: }
58:
59: #
60: # Dumps all elements of the table structure.
61: # Need this 'cause evidently when given an array, Data::Dumper only seems
62: # to dump element 0.
63: #
64: #sub debug_dump_table {
65: # my $lastrow = $#Apache::londefdef::table;
66: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
67: # my $row;
68: # for ($row =0; $row <= $lastrow; $row++ ) {
69: # my $text = Dumper($Apache::londefdef::table[$row]);
70: # &Apache::lonnet::logthis("table [ $row ]".$text);
71: # }
72: #}
73: sub initialize_londefdef {
74: $Apache::londefdef::TD_redirection=0;
75: @Apache::londefdef::table = ();
76: $Apache::londefdef::select=0;
77: undef(@Apache::londefdef::description);
78: @Apache::londefdef::DD=(0);
79: @Apache::londefdef::DT=(0);
80: @Apache::londefdef::seenDT=(0);
81: $Apache::londefdef::list_index=0;
82: undef($Apache::londefdef::head);
83: undef($Apache::londefdef::title);
84: }
85:
86: #======================= TAG SUBROUTINES =====================
87: #-- <output>
88: sub start_output {
89: my ($target) = @_;
90: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
91: return '';
92: }
93: sub end_output {
94: my ($target) = @_;
95: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
96: return '';
97: }
98: #-- <m> tag
99: sub start_m {
100: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
101: my $currentstring = '';
102: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
103: if ($target eq 'web' || $target eq 'analyze') {
104: &Apache::lonxml::debug("M is starting with:$inside:");
105: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
106: if ($eval eq 'on') {
107: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
108: #&Apache::lonxml::debug("M is evaulated to:$inside:");
109: }
110: my $tex = $inside;
111: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
112: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
113: if ($Apache::lontexconvert::errorstring) {
114: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
115: $tex = &HTML::Entities::encode($tex,'<>&"');
116: my ($linenumber) =
117: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
118: if (defined($linenumber)) {
119: my @tex=split("\n",$tex);
120: $tex[$linenumber]='<b><font color="red">'.
121: $tex[$linenumber].'</font></b>';
122: $tex=join("\n",@tex);
123: }
124: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
125: $Apache::lontexconvert::errorstring='';
126: }
127: #&Apache::lonxml::debug("M is ends with:$currentstring:");
128: $Apache::lonxml::post_evaluate=0;
129: } elsif ($target eq 'tex') {
130: $currentstring = $inside;
131: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
132: if ($eval eq 'on') {
133: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
134: }
135: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
136: # detect simple math mode entry exits, and convert them
137: # to use \ensuremath
138: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
139: $currentstring=~s/^(\s*)\$/$1/;
140: $currentstring=~s/\$(\s*)$/$1/;
141: $currentstring='\ensuremath{'.$currentstring.'}';
142: }
143: $Apache::lonxml::post_evaluate=0;
144: }
145: return $currentstring;
146: }
147:
148: sub end_m {
149: my ($target,$token) = @_;
150: my $currentstring = '';
151: if ($target eq 'tex') {
152: $currentstring = "";
153: }
154: return $currentstring;
155: }
156:
157: sub start_tthoption {
158: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
159: my $result;
160: if ($target eq 'web' || $target eq 'webgrade') {
161: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
162: $style);
163: $inside=~s/^\s*//;
164: if ($env{'browser.mathml'}) {
165: &tth::ttmoptions($inside);
166: } else {
167: &tth::tthoptions($inside);
168: }
169: }
170: return $result;
171: }
172:
173: sub end_tthoption {
174: my ($target,$token) = @_;
175: my $result;
176: return $result;
177: }
178:
179: #-- <html> tag (end tag optional)
180: sub start_html {
181: my ($target,$token) = @_;
182: my $currentstring = '';
183: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
184: # start_body() takes care of emitting the <html>
185: } elsif ($target eq 'tex') {
186: $currentstring .=
187: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
188: if (($env{'form.latex_type'}=~'batchmode') ||
189: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
190: $currentstring .= '\newcommand{\keephidden}[1]{}'.
191: '\renewcommand{\deg}{$^{\circ}$}'.
192: '\usepackage{multirow}'.
193: '\usepackage{longtable}'.
194: '\usepackage{textcomp}'.
195: '\usepackage{makeidx}'.
196: '\usepackage[dvips]{graphicx}'.
197: '\usepackage{wrapfig}'.
198: '\usepackage{picins}'.
199: '\usepackage{epsfig}'.
200: '\usepackage{calc}'.
201: '\usepackage{amsmath}'.
202: '\usepackage{amssymb}'.
203: '\usepackage{amsfonts}'.
204: '\usepackage{amsthm}'.
205: '\usepackage{amscd}'.
206: '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'.
207: '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}';
208: }
209: return $currentstring;
210: }
211:
212: sub end_html {
213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
214: my $currentstring = '';
215: if ($target eq 'web' || $target eq 'webgrade') {
216: # end_body takes care of the </html>
217: }
218: return $currentstring;
219: }
220:
221: #-- <head> tag (end tag optional)
222: sub start_head {
223: my ($target,$token) = @_;
224: my $currentstring = '';
225: if ($target eq 'web' || $target eq 'webgrade') {
226: &Apache::lonxml::startredirection();
227: }
228: return $currentstring;
229: }
230:
231: sub end_head {
232: my ($target,$token) = @_;
233: my $currentstring = '';
234: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
235: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
236: # in case there is a </head> but no <head>
237: if ($Apache::lonxml::redirection) {
238: $Apache::londefdef::head = &Apache::lonxml::endredirection();
239: }
240: }
241: return $currentstring;
242: }
243:
244: #-- <map> tag (end tag required)
245: sub start_map {
246: my ($target,$token) = @_;
247: my $currentstring = '';
248: if ($target eq 'web' || $target eq 'webgrade') {
249: $currentstring = $token->[4];
250: }
251: return $currentstring;
252: }
253:
254: sub end_map {
255: my ($target,$token) = @_;
256: my $currentstring = '';
257: if ($target eq 'web' || $target eq 'webgrade') {
258: $currentstring = $token->[2];
259: }
260: return $currentstring;
261: }
262:
263: #-- <select> tag (end tag required)
264: sub start_select {
265: my ($target,$token) = @_;
266: my $currentstring = '';
267: if ($target eq 'web' || $target eq 'webgrade') {
268: $currentstring = $token->[4];
269: } elsif ($target eq 'tex') {
270: $Apache::londefdef::select=0;
271: }
272: return $currentstring;
273: }
274:
275: sub end_select {
276: my ($target,$token) = @_;
277: my $currentstring = '';
278: if ($target eq 'web' || $target eq 'webgrade') {
279: $currentstring = $token->[2];
280: }
281: return $currentstring;
282: }
283:
284: #-- <option> tag (end tag optional)
285: sub start_option {
286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
287: my $currentstring = '';
288: if ($target eq 'web' || $target eq 'webgrade') {
289: $currentstring = $token->[4];
290: } elsif ($target eq 'tex') {
291: $Apache::londefdef::select++;
292: if ($Apache::londefdef::select == 1) {
293: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
294: } else {
295: $currentstring='\keephidden{';
296: }
297: }
298: return $currentstring;
299: }
300:
301: sub end_option {
302: my ($target,$token) = @_;
303: my $currentstring = '';
304: if ($target eq 'web' || $target eq 'webgrade') {
305: $currentstring = $token->[2];
306: } elsif ($target eq 'tex') {
307: $currentstring='}';
308: }
309: return $currentstring;
310: }
311:
312: #-- <input> tag (end tag forbidden)
313: sub start_input {
314: my ($target,$token) = @_;
315: my $currentstring = '';
316: if ($target eq 'web' || $target eq 'webgrade') {
317: $currentstring = $token->[4];
318: }
319: return $currentstring;
320: }
321:
322: sub end_input {
323: my ($target,$token) = @_;
324: my $currentstring = '';
325: if ($target eq 'web' || $target eq 'webgrade') {
326: $currentstring = $token->[2];
327: }
328: return $currentstring;
329: }
330:
331: #-- <textarea> tag (end tag required)
332: sub start_textarea {
333: my ($target,$token) = @_;
334: my $currentstring = '';
335: if ($target eq 'web' || $target eq 'webgrade') {
336: $currentstring = $token->[4];
337: }
338: return $currentstring;
339: }
340:
341: sub end_textarea {
342: my ($target,$token) = @_;
343: my $currentstring = '';
344: if ($target eq 'web' || $target eq 'webgrade') {
345: $currentstring = $token->[2];
346: }
347: return $currentstring;
348: }
349:
350: #-- <form> tag (end tag required)
351: sub start_form {
352: my ($target,$token) = @_;
353: my $currentstring = '';
354: if ($target eq 'web' || $target eq 'webgrade') {
355: $currentstring = $token->[4];
356: }
357: return $currentstring;
358: }
359:
360: sub end_form {
361: my ($target,$token) = @_;
362: my $currentstring = '';
363: if ($target eq 'web' || $target eq 'webgrade') {
364: $currentstring = $token->[2];
365: }
366: return $currentstring;
367: }
368:
369: #-- <title> tag (end tag required)
370: sub start_title {
371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
372: my $currentstring = '';
373: if ($target eq 'web' || $target eq 'webgrade') {
374: $Apache::londefdef::title =
375: &Apache::lonxml::get_all_text('/title',$parser,$style);
376: } elsif ($target eq 'tex') {
377: $currentstring .= '\keephidden{Title of the document: '
378: }
379: if ($target eq 'meta') {
380: $currentstring='<title>';
381: &start_output($target);
382: }
383: return $currentstring;
384: }
385:
386: sub end_title {
387: my ($target,$token) = @_;
388: my $currentstring = '';
389: if ($target eq 'web' || $target eq 'webgrade') {
390: # start_title takes care of swallowing the title
391: } elsif ($target eq 'tex') {
392: $currentstring .= '}';
393: }
394: if ($target eq 'meta') {
395: &end_output($target);
396: $currentstring='</title>';
397: }
398: return $currentstring;
399: }
400:
401: #-- <meta> tag (end tag forbidden)
402: sub start_meta {
403: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
404: my $currentstring = '';
405: if ($target eq 'web' || $target eq 'webgrade') {
406: my $args='';
407: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
408: if ($args eq '') {
409: &Apache::lonxml::get_all_text("/meta",$parser,$style);
410: } else {
411: $currentstring = $token->[4];
412: }
413: } elsif ($target eq 'meta') {
414: unless (&Apache::lonxml::get_param
415: ('http-equiv',$parstack,$safeeval,undef,1)) {
416: my $name=$token->[2]->{'name'};
417: $name=~tr/A-Z/a-z/;
418: $name=~s/\s/\_/gs;
419: $name=~s/\W//gs;
420: if ($name) {
421: $currentstring='<'.$name;
422: my $display=&Apache::lonxml::get_param
423: ('display',$parstack,$safeeval,undef,1);
424: if ($display) {
425: $display=~s/\"/\'/g;
426: $currentstring.=' display="'.$display.'"';
427: }
428: $currentstring.='>'.
429: &Apache::lonxml::get_param
430: ('content',$parstack,$safeeval,undef,1).
431: '</'.$name.'>';
432: }
433: my $display=&Apache::lonxml::get_param
434: ('display',$parstack,$safeeval,undef,1);
435: if ($display) {
436: $display=&HTML::Entities::encode($display,'<>&"');
437: $currentstring.='<'.$name.'.display>'.$display.
438: '</'.$name.'.display>';
439: }
440: }
441: } elsif ($target eq 'tex') {
442: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
443: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
444: if ((not defined $content) && (not defined $name)) {
445: &Apache::lonxml::startredirection();
446: }
447: }
448: return $currentstring;
449: }
450:
451: sub end_meta {
452: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
453: my $currentstring = '';
454: if ($target eq 'web' || $target eq 'webgrade') {
455: my $args='';
456: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
457: if ($args ne '') {
458: $currentstring = $token->[4];
459: }
460: } elsif ($target eq 'tex') {
461: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
462: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
463: if ((not defined $content) && (not defined $name)) {
464: &Apache::lonxml::endredirection();
465: }
466: }
467: return $currentstring;
468: }
469:
470: # accessrule
471: sub start_accessrule {
472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
473: my $currentstring = '';
474: my $eff=&Apache::lonxml::get_param
475: ('effect',$parstack,$safeeval,undef,1);
476: my $realm=&Apache::lonxml::get_param
477: ('realm',$parstack,$safeeval,undef,1);
478: my $role=&Apache::lonxml::get_param
479: ('role',$parstack,$safeeval,undef,1);
480: $realm=~s/\s+//g;
481: $realm=~s/\//\_/g;
482: $realm=~s/^\_//;
483: $realm=~s/\W/\;/g;
484: $role=~s/\s+//g;
485: $role=~s/\//\_/g;
486: $role=~s/\W/\;/g;
487: if ($target eq 'web') {
488: my $args='';
489: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
490: if ($args eq '') {
491: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
492: } else {
493: $currentstring = $token->[4];
494: }
495: }
496: if ($target eq 'meta') {
497: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
498: }
499: return $currentstring;
500: }
501:
502: sub end_accessrule {
503: my ($target,$token,$tagstack,$parstack,$parser) = @_;
504: my $currentstring = '';
505: if ($target eq 'web') {
506: my $args='';
507: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
508: if ($args ne '') {
509: $currentstring = $token->[4];
510: }
511: }
512: return $currentstring;
513: }
514:
515: #-- <body> tag (end tag required)
516: sub start_body {
517: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
518: my $currentstring = '';
519:
520: if ($target eq 'web' || $target eq 'webgrade') {
521: if ($Apache::lonhomework::parsing_a_problem) {
522: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
523: return '';
524: }
525:
526: if (&is_inside_of($tagstack, "head")) {
527: &end_head(@_);
528: }
529: $currentstring =
530: &Apache::loncommon::start_page($Apache::londefdef::title,
531: $Apache::londefdef::head,
532: {'add_entries' => $token->[2],
533: 'no_title' => 1,
534: 'force_register' => 1});
535:
536: if ($env{'request.state'} ne 'published') {
537: $currentstring.=&Apache::lonmenu::constspaceform();
538: $currentstring.=(<<EDITBUTTON);
539: <form method="post">
540: <input type="submit" name="editmode" accesskey="e" value="Edit" />
541: </form>
542: <br />
543: EDITBUTTON
544: }
545: $currentstring.=&Apache::lonxml::message_location();
546: } elsif ($target eq 'tex') {
547: $currentstring = '\begin{document}';
548: }
549: return $currentstring;
550: }
551:
552: sub end_body {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
554: my $currentstring = &end_p(); # Close off unclosed <p>
555: if ($target eq 'web' || $target eq 'webgrade') {
556: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
557: } elsif ($target eq 'tex') {
558: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
559: }
560: return $currentstring;
561: }
562:
563: # \begin{center} causes a new paragprah spacing that looks odd inside
564: # of a table cell
565: sub center_correction { return '\vspace*{-6 mm}'; }
566: #-- <center> tag (end tag required)
567: sub start_center {
568: my ($target,$token,$tagstack) = @_;
569: my $currentstring = &end_p(); # Close off any prior para.
570: if ($target eq 'web' || $target eq 'webgrade') {
571: $currentstring .= $token->[4];
572: } elsif ($target eq 'tex') {
573: if (&is_inside_of($tagstack, "table")) {
574: $currentstring .= ¢er_correction();
575: }
576: $currentstring .= '\begin{center}';
577: }
578: return $currentstring;
579: }
580:
581: sub end_center {
582: my ($target,$token,$tagstack) = @_;
583: my $currentstring = '';
584: if ($target eq 'web' || $target eq 'webgrade') {
585: $currentstring = $token->[2];
586: } elsif ($target eq 'tex') {
587: $currentstring = '\end{center}';
588: }
589: return $currentstring;
590: }
591:
592: #-- <b> tag (end tag required)
593: # NOTE: In TeX mode disables internal <p>
594: sub start_b {
595: my ($target,$token) = @_;
596: my $currentstring = '';
597: if ($target eq 'web' || $target eq 'webgrade') {
598: $currentstring = $token->[4];
599: } elsif ($target eq 'tex') {
600: &disable_para();
601: $currentstring .= '\textbf{';
602: }
603: return $currentstring;
604: }
605:
606: sub end_b {
607: my ($target,$token) = @_;
608: my $currentstring = '';
609: if ($target eq 'web' || $target eq 'webgrade') {
610: $currentstring = $token->[2];
611: } elsif ($target eq 'tex') {
612: &enable_para();
613: $currentstring = '}';
614: }
615: return $currentstring;
616: }
617:
618: #-- <strong> tag (end tag required)
619: # NOTE: in TeX mode disables internal <p>
620: sub start_strong {
621: my ($target,$token) = @_;
622: my $currentstring = '';
623: if ($target eq 'web' || $target eq 'webgrade') {
624: $currentstring = $token->[4];
625: } elsif ($target eq 'tex') {
626: &disable_para();
627: $currentstring = '\textbf{';
628: }
629: return $currentstring;
630: }
631:
632: sub end_strong {
633: my ($target,$token) = @_;
634: my $currentstring = '';
635: if ($target eq 'web' || $target eq 'webgrade') {
636: $currentstring = $token->[2];
637: } elsif ($target eq 'tex') {
638: &enable_para();
639: $currentstring = '}';
640: }
641: return $currentstring;
642: }
643:
644: #-- <h1> tag (end tag required)
645: sub start_h1 {
646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
647: my $currentstring = &end_p(); # Close off any prior para.
648: if ($target eq 'web' || $target eq 'webgrade') {
649: $currentstring .= $token->[4];
650: } elsif ($target eq 'tex') {
651: my $pre;
652: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
653: if ($align eq 'center') {
654: $pre='\begin{center}';
655: } elsif ($align eq 'left') {
656: $pre='\rlap{';
657: } elsif ($align eq 'right') {
658: $pre=' \hfill \llap{';
659: }
660: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
661: if (not defined $TeXsize) {$TeXsize="large";}
662: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
663: } elsif ($target eq 'meta') {
664: $currentstring.='<subject>';
665: &start_output($target);
666: }
667: return $currentstring;
668: }
669:
670: sub end_h1 {
671: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
672: my $currentstring = '';
673: if ($target eq 'web' || $target eq 'webgrade') {
674: $currentstring .= $token->[2];
675: } elsif ($target eq 'tex') {
676: my $post='\vskip 0 mm ';
677: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
678: if ($align eq 'center') {
679: $post='\end{center}';
680: } elsif ($align eq 'left') {
681: $post='} \hfill'.'\vskip 0 mm ';
682: } elsif ($align eq 'right') {
683: $post='}'.'\vskip 0 mm ';
684: }
685: $currentstring .= '}}'.$post;
686: } elsif ($target eq 'meta') {
687: &end_output($target);
688: $currentstring='</subject>';
689: }
690: return $currentstring;
691: }
692:
693: #-- <h2> tag
694: sub start_h2 {
695: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
696: my $currentstring = &end_p(); # Close off any prior para.
697: if ($target eq 'web' || $target eq 'webgrade') {
698: $currentstring .= $token->[4];
699: } elsif ($target eq 'tex') {
700: my $pre;
701: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
702: if ($align eq 'center') {
703: $pre='\begin{center}';
704: } elsif ($align eq 'left') {
705: $pre='\rlap{';
706: } elsif ($align eq 'right') {
707: $pre=' \hfill \llap{';
708: }
709: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
710: if (not defined $TeXsize) {$TeXsize="large";}
711: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
712: }
713: return $currentstring;
714: }
715:
716: sub end_h2 {
717: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
718: my $currentstring = '';
719: if ($target eq 'web' || $target eq 'webgrade') {
720: $currentstring .= $token->[2];
721: } elsif ($target eq 'tex') {
722: my $post='\vskip 0 mm ';
723: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
724: if ($align eq 'center') {
725: $post='\end{center}';
726: } elsif ($align eq 'left') {
727: $post='} \hfill'.'\vskip 0 mm ';
728: } elsif ($align eq 'right') {
729: $post='}'.'\vskip 0 mm ';
730: }
731: $currentstring .= '}}'.$post;
732: }
733: return $currentstring;
734: }
735:
736: #-- <h3> tag
737: sub start_h3 {
738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
739: my $currentstring = &end_p(); # Close off any prior para.
740: if ($target eq 'web' || $target eq 'webgrade') {
741: $currentstring .= $token->[4];
742: } elsif ($target eq 'tex') {
743: my $pre;
744: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
745: if ($align eq 'center') {
746: $pre='\begin{center}';
747: } elsif ($align eq 'left') {
748: $pre='\rlap{';
749: } elsif ($align eq 'right') {
750: $pre=' \hfill \llap{';
751: }
752: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
753: if (not defined $TeXsize) {$TeXsize="large";}
754: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
755: }
756: return $currentstring;
757: }
758:
759: sub end_h3 {
760: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
761: my $currentstring = '';
762: if ($target eq 'web' || $target eq 'webgrade') {
763: $currentstring .= $token->[2];
764: } elsif ($target eq 'tex') {
765: my $post='\vskip 0 mm ';
766: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
767: if ($align eq 'center') {
768: $post='\end{center}';
769: } elsif ($align eq 'left') {
770: $post='} \hfill'.'\vskip 0 mm ';
771: } elsif ($align eq 'right') {
772: $post='}'.'\vskip 0 mm ';
773: }
774: $currentstring .= '}}'.$post;
775: }
776: return $currentstring;
777: }
778:
779: #-- <h4> tag
780: sub start_h4 {
781: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
782: my $currentstring = &end_p(); # Close off any prior para.
783: if ($target eq 'web' || $target eq 'webgrade') {
784: $currentstring .= $token->[4];
785: } elsif ($target eq 'tex') {
786: my $pre;
787: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
788: if ($align eq 'center') {
789: $pre='\begin{center}';
790: } elsif ($align eq 'left') {
791: $pre='\rlap{';
792: } elsif ($align eq 'right') {
793: $pre=' \hfill \llap{';
794: }
795: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
796: if (not defined $TeXsize) {$TeXsize="large";}
797: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
798: }
799: return $currentstring;
800: }
801:
802: sub end_h4 {
803: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
804: my $currentstring = '';
805: if ($target eq 'web' || $target eq 'webgrade') {
806: $currentstring .= $token->[2];
807: } elsif ($target eq 'tex') {
808: my $post='\vskip 0 mm ';
809: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
810: if ($align eq 'center') {
811: $post='\end{center}';
812: } elsif ($align eq 'left') {
813: $post='} \hfill'.'\vskip 0 mm ';
814: } elsif ($align eq 'right') {
815: $post='}'.'\vskip 0 mm ';
816: }
817: $currentstring .= '}}'.$post;
818: }
819: return $currentstring;
820: }
821:
822: #-- <h5> tag
823: sub start_h5 {
824: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
825: my $currentstring = &end_p(); # Close off any prior paras.
826: if ($target eq 'web' || $target eq 'webgrade') {
827: $currentstring .= $token->[4];
828: } elsif ($target eq 'tex') {
829: my $pre;
830: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
831: if ($align eq 'center') {
832: $pre='\begin{center}';
833: } elsif ($align eq 'left') {
834: $pre='\rlap{';
835: } elsif ($align eq 'right') {
836: $pre=' \hfill \llap{';
837: }
838: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
839: if (not defined $TeXsize) {$TeXsize="large";}
840: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
841: }
842: return $currentstring;
843: }
844:
845: sub end_h5 {
846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
847: my $currentstring = '';
848: if ($target eq 'web' || $target eq 'webgrade') {
849: $currentstring .= $token->[2];
850: } elsif ($target eq 'tex') {
851: my $post='\vskip 0 mm ';
852: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
853: if ($align eq 'center') {
854: $post='\end{center}';
855: } elsif ($align eq 'left') {
856: $post='} \hfill'.'\vskip 0 mm ';
857: } elsif ($align eq 'right') {
858: $post='}'.'\vskip 0 mm ';
859: }
860: $currentstring .= '}}'.$post;
861: }
862: return $currentstring;
863: }
864:
865: #-- <h6> tag
866: sub start_h6 {
867: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
868: my $currentstring = &end_p(); # Close off any prior paras.
869: if ($target eq 'web' || $target eq 'webgrade') {
870: $currentstring .= $token->[4];
871: } elsif ($target eq 'tex') {
872: my $pre;
873: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
874: if ($align eq 'center') {
875: $pre='\begin{center}';
876: } elsif ($align eq 'left') {
877: $pre='\rlap{';
878: } elsif ($align eq 'right') {
879: $pre=' \hfill \llap{';
880: }
881: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
882: if (not defined $TeXsize) {$TeXsize="large";}
883: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
884: }
885: return $currentstring;
886: }
887:
888: sub end_h6 {
889: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
890: my $currentstring = '';
891: if ($target eq 'web' || $target eq 'webgrade') {
892: $currentstring .= $token->[2];
893: } elsif ($target eq 'tex') {
894: my $post='\vskip 0 mm ';
895: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
896: if ($align eq 'center') {
897: $post='\end{center}';
898: } elsif ($align eq 'left') {
899: $post='} \hfill'.'\vskip 0 mm ';
900: } elsif ($align eq 'right') {
901: $post='}'.'\vskip 0 mm ';
902: }
903: $currentstring .= '}}'.$post;
904: }
905: return $currentstring;
906: }
907:
908: #--- <cite> tag (end tag required)
909: sub start_cite {
910: my ($target,$token) = @_;
911: my $currentstring = '';
912: if ($target eq 'web' || $target eq 'webgrade') {
913: $currentstring .= $token->[4];
914: } elsif ($target eq 'tex') {
915: $currentstring .= '\textit{';
916: }
917: return $currentstring;
918: }
919:
920: sub end_cite {
921: my ($target,$token) = @_;
922: my $currentstring = '';
923: if ($target eq 'web' || $target eq 'webgrade') {
924: $currentstring .= $token->[2];
925: } elsif ($target eq 'tex') {
926: $currentstring .= '}';
927: }
928: return $currentstring;
929: }
930:
931: #-- <i> tag (end tag required)
932: sub start_i {
933: my ($target,$token) = @_;
934: my $currentstring = '';
935: if ($target eq 'web' || $target eq 'webgrade') {
936: $currentstring .= $token->[4];
937: } elsif ($target eq 'tex') {
938: $currentstring .= '\textit{';
939: }
940: return $currentstring;
941: }
942:
943: sub end_i {
944: my ($target,$token) = @_;
945: my $currentstring = '';
946: if ($target eq 'web' || $target eq 'webgrade') {
947: $currentstring .= $token->[2];
948: } elsif ($target eq 'tex') {
949: $currentstring .= '}';
950: }
951: return $currentstring;
952: }
953:
954: #-- <address> tag (end tag required)
955: sub start_address {
956: my ($target,$token) = @_;
957: my $currentstring = '';
958: if ($target eq 'web' || $target eq 'webgrade') {
959: $currentstring .= $token->[4];
960: } elsif ($target eq 'tex') {
961: $currentstring .= '\textit{';
962: }
963: return $currentstring;
964: }
965:
966: sub end_address {
967: my ($target,$token) = @_;
968: my $currentstring = '';
969: if ($target eq 'web' || $target eq 'webgrade') {
970: $currentstring .= $token->[2];
971: } elsif ($target eq 'tex') {
972: $currentstring .= '}';
973: }
974: return $currentstring;
975: }
976:
977: #-- <dfn> tag (end tag required)
978: sub start_dfn {
979: my ($target,$token) = @_;
980: my $currentstring = '';
981: if ($target eq 'web' || $target eq 'webgrade') {
982: $currentstring .= $token->[4];
983: } elsif ($target eq 'tex') {
984: $currentstring .= '\textit{';
985: }
986: return $currentstring;
987: }
988:
989: sub end_dfn {
990: my ($target,$token) = @_;
991: my $currentstring = '';
992: if ($target eq 'web' || $target eq 'webgrade') {
993: $currentstring .= $token->[2];
994: } elsif ($target eq 'tex') {
995: $currentstring .= '}';
996: }
997: return $currentstring;
998: }
999:
1000: #-- <tt> tag (end tag required)
1001: sub start_tt {
1002: my ($target,$token) = @_;
1003: my $currentstring = '';
1004: if ($target eq 'web' || $target eq 'webgrade') {
1005: $currentstring .= $token->[4];
1006: } elsif ($target eq 'tex') {
1007: $currentstring .= '\texttt{';
1008: }
1009: return $currentstring;
1010: }
1011:
1012: sub end_tt {
1013: my ($target,$token) = @_;
1014: my $currentstring = '';
1015: if ($target eq 'web' || $target eq 'webgrade') {
1016: $currentstring .= $token->[2];
1017: } elsif ($target eq 'tex') {
1018: $currentstring .= '}';
1019: }
1020: return $currentstring;
1021: }
1022:
1023: #-- <kbd> tag (end tag required)
1024: sub start_kbd {
1025: my ($target,$token) = @_;
1026: my $currentstring = '';
1027: if ($target eq 'web' || $target eq 'webgrade') {
1028: $currentstring .= $token->[4];
1029: } elsif ($target eq 'tex') {
1030: $currentstring .= '\texttt{';
1031: }
1032: return $currentstring;
1033: }
1034:
1035: sub end_kbd {
1036: my ($target,$token) = @_;
1037: my $currentstring = '';
1038: if ($target eq 'web' || $target eq 'webgrade') {
1039: $currentstring .= $token->[2];
1040: } elsif ($target eq 'tex') {
1041: $currentstring .= '}';
1042: }
1043: return $currentstring;
1044: }
1045:
1046: #-- <code> tag (end tag required)
1047: sub start_code {
1048: my ($target,$token) = @_;
1049: my $currentstring = '';
1050: if ($target eq 'web' || $target eq 'webgrade') {
1051: $currentstring .= $token->[4];
1052: } elsif ($target eq 'tex') {
1053: $currentstring .= '\texttt{';
1054: }
1055: return $currentstring;
1056: }
1057:
1058: sub end_code {
1059: my ($target,$token) = @_;
1060: my $currentstring = '';
1061: if ($target eq 'web' || $target eq 'webgrade') {
1062: $currentstring .= $token->[2];
1063: } elsif ($target eq 'tex') {
1064: $currentstring .= '}';
1065: }
1066: return $currentstring;
1067: }
1068:
1069: #-- <em> tag (end tag required)
1070: sub start_em {
1071: my ($target,$token) = @_;
1072: my $currentstring = '';
1073: if ($target eq 'web' || $target eq 'webgrade') {
1074: $currentstring .= $token->[4];
1075: } elsif ($target eq 'tex') {
1076: $currentstring .= '\emph{';
1077: }
1078: return $currentstring;
1079: }
1080:
1081: sub end_em {
1082: my ($target,$token) = @_;
1083: my $currentstring = '';
1084: if ($target eq 'web' || $target eq 'webgrade') {
1085: $currentstring .= $token->[2];
1086: } elsif ($target eq 'tex') {
1087: $currentstring .= '}';
1088: }
1089: return $currentstring;
1090: }
1091:
1092: #-- <q> tag (end tag required)
1093: sub start_q {
1094: my ($target,$token) = @_;
1095: my $currentstring = '';
1096: if ($target eq 'web' || $target eq 'webgrade') {
1097: $currentstring .= $token->[4];
1098: } elsif ($target eq 'tex') {
1099: $currentstring .= '\emph{';
1100: }
1101: return $currentstring;
1102: }
1103:
1104: sub end_q {
1105: my ($target,$token) = @_;
1106: my $currentstring = '';
1107: if ($target eq 'web' || $target eq 'webgrade') {
1108: $currentstring .= $token->[2];
1109: } elsif ($target eq 'tex') {
1110: $currentstring .= '}';
1111: }
1112: return $currentstring;
1113: }
1114:
1115: # <p> is a bit strange since it does not require a closing </p>
1116: # However in latex, we must often output closing stuff to end
1117: # environments and {}'s etc. Therefore we do all the work
1118: # of figuring out the ending strings in the start tag processing,
1119: # and provide a mechanism to output the stop text external
1120: # to tag processing.
1121: #
1122: {
1123:
1124: my $closing_string = ''; # String required to close <p>
1125:
1126: # Some tags are <p> fragile meaning that <p> inside of them
1127: # does not work within TeX mode. This is managed via the
1128: # counter below:
1129: #
1130:
1131: my $para_disabled = 0;
1132:
1133: sub disable_para {
1134: $para_disabled++;
1135: }
1136: sub enable_para {
1137: $para_disabled--;
1138: }
1139:
1140:
1141: #-- <p> tag (end tag optional)
1142: #optional attribute - align="center|left|right"
1143: sub start_p {
1144: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1145: my $currentstring = '';
1146: if ($target eq 'web' || $target eq 'webgrade') {
1147: $currentstring .= &end_p(); # close off prior para if in progress.
1148: $currentstring .= $token->[4];
1149: if (! ($currentstring =~ /\//)) {
1150: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1151: }
1152: } elsif ($target eq 'tex' && !$para_disabled) {
1153:
1154: $currentstring .= &end_p(); # close off prior para if in progress.
1155: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1156: if ($align eq 'center') {
1157: $currentstring .='\begin{center}\par ';
1158: $closing_string = '\end{center}';
1159: if (&is_inside_of($tagstack, "table")) {
1160: $currentstring = ¢er_correction().$currentstring;
1161: }
1162: } elsif ($align eq 'right') {
1163: $currentstring.="\n".'{\flushright ';
1164: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1165: $closing_string= "}\n";
1166: } elsif ($align eq 'left') {
1167: $currentstring.= "\n".'{\flushleft ';
1168: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1169: $closing_string = "}\n";
1170: } else {
1171: $currentstring.='\par ';
1172: if (&is_inside_of($tagstack, 'table')) {
1173: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1174: } else {
1175: $closing_string = '\strut\\\\\strut ';
1176: }
1177: }
1178:
1179: }
1180: return $currentstring;
1181: }
1182: #
1183: # End paragraph processing just requires that we output the
1184: # closing string that was saved and blank it.
1185: sub end_p {
1186: # Note only 'tex' mode uses disable_para and enable_para
1187: # so we don't need to know the target in the check below:
1188:
1189: if (!$para_disabled) {
1190: my $current_string = $closing_string;
1191: $closing_string = ''; # Not in a para anymore.
1192: return $current_string;
1193: } else {
1194: return '';
1195: }
1196:
1197: }
1198: }
1199: #-- <br> tag (end tag forbidden)
1200: sub start_br {
1201: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1202: my $currentstring = '';
1203: if ($target eq 'web' || $target eq 'webgrade') {
1204: $currentstring .= $token->[4];
1205: } elsif ($target eq 'tex') {
1206: my @tempo=@$tagstack;
1207: my $signal=0;
1208: # Not going to factor this to is_inside_of since that would require
1209: # multiple stack traversals.
1210: #
1211: for (my $i=$#tempo;$i>=0;$i--) {
1212: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1213: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1214: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1215: $signal=1;
1216: last;
1217: }
1218: }
1219: if ($signal) {
1220: $currentstring .= ' \vskip 0 mm ';
1221: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1222: $currentstring .= '\strut \\\\ \strut ';
1223: }
1224: }
1225: return $currentstring;
1226: }
1227:
1228: sub end_br {
1229: my ($target,$token) = @_;
1230: my $currentstring = '';
1231: if ($target eq 'web' || $target eq 'webgrade') {
1232: $currentstring .= $token->[2];
1233: }
1234: return $currentstring;
1235: }
1236:
1237: #-- <big> tag (end tag required)
1238: sub start_big {
1239: my ($target,$token) = @_;
1240: my $currentstring = '';
1241: if ($target eq 'web' || $target eq 'webgrade') {
1242: $currentstring .= $token->[4];
1243: } elsif ($target eq 'tex') {
1244: $currentstring .= '{\large ';
1245: }
1246: return $currentstring;
1247: }
1248:
1249: sub end_big {
1250: my ($target,$token) = @_;
1251: my $currentstring = '';
1252: if ($target eq 'web' || $target eq 'webgrade') {
1253: $currentstring .= $token->[2];
1254: } elsif ($target eq 'tex') {
1255: $currentstring .= '}';
1256: }
1257: return $currentstring;
1258: }
1259:
1260: #-- <small> tag (end tag required)
1261: sub start_small {
1262: my ($target,$token) = @_;
1263: my $currentstring = '';
1264: if ($target eq 'web' || $target eq 'webgrade') {
1265: $currentstring .= $token->[4];
1266: } elsif ($target eq 'tex') {
1267: $currentstring .= '{\footnotesize ';
1268: }
1269: return $currentstring;
1270: }
1271:
1272: sub end_small {
1273: my ($target,$token) = @_;
1274: my $currentstring = '';
1275: if ($target eq 'web' || $target eq 'webgrade') {
1276: $currentstring .= $token->[2];
1277: } elsif ($target eq 'tex') {
1278: $currentstring .= '}';
1279: }
1280: return $currentstring;
1281: }
1282:
1283: #-- <basefont> tag (end tag forbidden)
1284: sub start_basefont {
1285: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1286: my $currentstring = '';
1287: if ($target eq 'web' || $target eq 'webgrade') {
1288: $currentstring = $token->[4];
1289: } elsif ($target eq 'tex') {
1290: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1291: if (defined $basesize) {
1292: $currentstring = '{\\'.$basesize.' ';
1293: }
1294: }
1295: return $currentstring;
1296: }
1297:
1298: sub end_basefont {
1299: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1300: my $currentstring = '';
1301: if ($target eq 'web' || $target eq 'webgrade') {
1302: $currentstring = $token->[4];
1303: } elsif ($target eq 'tex') {
1304: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1305: if (defined $basesize) {
1306: $currentstring = '}';
1307: }
1308: }
1309: return $currentstring;
1310: }
1311:
1312: #-- <font> tag (end tag required)
1313: sub start_font {
1314: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1315: my $currentstring = '';
1316: if ($target eq 'web' || $target eq 'webgrade') {
1317: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1318: if ($face!~/symbol/i) {
1319: if (($env{'browser.fontenhance'} eq 'on') ||
1320: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1321: }
1322: $currentstring = $token->[4];
1323: } elsif ($target eq 'tex') {
1324: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1325: if (defined $fontsize) {
1326: $currentstring = '{\\'.$fontsize.' ';
1327: }
1328: }
1329: return $currentstring;
1330: }
1331:
1332: sub end_font {
1333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1334: my $currentstring = '';
1335: if ($target eq 'web' || $target eq 'webgrade') {
1336: $currentstring = $token->[2];
1337: } elsif ($target eq 'tex') {
1338: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1339: if (defined $fontsize) {
1340: $currentstring = '}';
1341: }
1342: }
1343: return $currentstring;
1344: }
1345:
1346: #-- <strike> tag (end tag required)
1347: sub start_strike {
1348: my ($target,$token) = @_;
1349: my $currentstring = '';
1350: if ($target eq 'web' || $target eq 'webgrade') {
1351: $currentstring .= $token->[4];
1352: } elsif ($target eq 'tex') {
1353: &Apache::lonxml::startredirection();
1354: }
1355: return $currentstring;
1356: }
1357:
1358: sub end_strike {
1359: my ($target,$token) = @_;
1360: my $currentstring = '';
1361: if ($target eq 'web' || $target eq 'webgrade') {
1362: $currentstring .= $token->[2];
1363: } elsif ($target eq 'tex') {
1364: $currentstring=&Apache::lonxml::endredirection();
1365: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1366: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1367: $currentstring=~s/(\S)\s*$/$1\}/;
1368: }
1369: return $currentstring;
1370: }
1371:
1372: #-- <s> tag (end tag required)
1373: sub start_s {
1374: my ($target,$token) = @_;
1375: my $currentstring = '';
1376: if ($target eq 'web' || $target eq 'webgrade') {
1377: $currentstring .= $token->[4];
1378: } elsif ($target eq 'tex') {
1379: &Apache::lonxml::startredirection();
1380: }
1381: return $currentstring;
1382: }
1383:
1384: sub end_s {
1385: my ($target,$token) = @_;
1386: my $currentstring = '';
1387: if ($target eq 'web' || $target eq 'webgrade') {
1388: $currentstring .= $token->[2];
1389: } elsif ($target eq 'tex') {
1390: $currentstring=&Apache::lonxml::endredirection();
1391: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1392: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1393: $currentstring=~s/(\S)\s*$/$1\}/;
1394: }
1395: return $currentstring;
1396: }
1397:
1398: #-- <sub> tag (end tag required)
1399: sub start_sub {
1400: my ($target,$token) = @_;
1401: my $currentstring = '';
1402: if ($target eq 'web' || $target eq 'webgrade') {
1403: $currentstring .= $token->[4];
1404: } elsif ($target eq 'tex') {
1405: $currentstring .= '\ensuremath{_{';
1406: }
1407: return $currentstring;
1408: }
1409:
1410: sub end_sub {
1411: my ($target,$token) = @_;
1412: my $currentstring = '';
1413: if ($target eq 'web' || $target eq 'webgrade') {
1414: $currentstring .= $token->[2];
1415: } elsif ($target eq 'tex') {
1416: $currentstring .= '}}';
1417: }
1418: return $currentstring;
1419: }
1420:
1421: #-- <sup> tag (end tag required)
1422: sub start_sup {
1423: my ($target,$token) = @_;
1424: my $currentstring = '';
1425: if ($target eq 'web' || $target eq 'webgrade') {
1426: $currentstring .= $token->[4];
1427: } elsif ($target eq 'tex') {
1428: $currentstring .= '\ensuremath{^{';
1429: }
1430: return $currentstring;
1431: }
1432:
1433: sub end_sup {
1434: my ($target,$token) = @_;
1435: my $currentstring = '';
1436: if ($target eq 'web' || $target eq 'webgrade') {
1437: $currentstring .= $token->[2];
1438: } elsif ($target eq 'tex') {
1439: $currentstring .= '}}';
1440: }
1441: return $currentstring;
1442: }
1443:
1444: #-- <hr> tag (end tag forbidden)
1445: sub start_hr {
1446: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1447: my $currentstring = &end_p(); # End enclosing para.
1448: if ($target eq 'web' || $target eq 'webgrade') {
1449: $currentstring .= $token->[4];
1450: } elsif ($target eq 'tex') {
1451: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1452: if (defined $LaTeXwidth) {
1453: if ($LaTeXwidth=~/^%/) {
1454: substr($LaTeXwidth,0,1)='';
1455: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1456: }
1457: } else {
1458: $LaTeXwidth ='0.9\textwidth';
1459: }
1460: my ($pre,$post);
1461: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1462: if (($align eq 'center') || (not defined $align)) {
1463: $pre=''; $post='';
1464: } elsif ($align eq 'left') {
1465: $pre='\rlap{'; $post='} \hfill';
1466: } elsif ($align eq 'right') {
1467: $pre=' \hfill \llap{'; $post='}';
1468: }
1469: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1470: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1471: }
1472: return $currentstring;
1473: }
1474:
1475: sub end_hr {
1476: my ($target,$token) = @_;
1477: my $currentstring = '';
1478: if ($target eq 'web' || $target eq 'webgrade') {
1479: $currentstring .= $token->[2];
1480: }
1481: return $currentstring;
1482: }
1483:
1484: #-- <div> tag (end tag required)
1485: {
1486:
1487: # Since div can be nested, the stack below is used
1488: # in 'tex' mode to store the ending strings
1489: # for the div stack.
1490:
1491: my @div_end_stack;
1492:
1493: sub start_div {
1494: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1495: my $currentstring = &end_p(); # Close enclosing para.
1496: if ($target eq 'web' || $target eq 'webgrade') {
1497: $currentstring .= $token->[4];
1498: }
1499: if ($target eq 'tex') {
1500: # 4 possible alignments: left, right, center, and -missing-.
1501:
1502: my $endstring = '';
1503:
1504: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1505: $safeeval, undef, 1));
1506: if ($align eq 'center') {
1507: $currentstring .= '\begin{center}';
1508: $endstring = '\end{center}';
1509: if (&is_inside_of($tagstack, "table")) {
1510: $currentstring = ¢er_correction().$currentstring;
1511: }
1512: }
1513: elsif ($align eq 'right') {
1514: $currentstring .= '\begin{flushright}';
1515: $endstring .= '\end{flushright}';
1516: } elsif ($align eq 'left') {
1517: $currentstring .= '\begin{flushleft}';
1518: $endstring = '\end{flushleft}';
1519: } else {
1520:
1521: }
1522: $currentstring .= "\n"; # For human readability.
1523: $endstring = "\n$endstring\n"; # For human readability
1524: push(@div_end_stack, $endstring);
1525: }
1526: return $currentstring;
1527: }
1528:
1529: sub end_div {
1530: my ($target,$token) = @_;
1531: my $currentstring = '';
1532: if ($target eq 'web' || $target eq 'webgrade') {
1533: $currentstring .= $token->[2];
1534: }
1535: if ($target eq 'tex') {
1536: my $endstring = pop @div_end_stack;
1537: $currentstring .= $endstring;
1538: }
1539: return $currentstring;
1540: }
1541: }
1542:
1543: #-- <a> tag (end tag required)
1544: sub start_a {
1545: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1546: my $currentstring = '';
1547: if ($target eq 'web' || $target eq 'webgrade') {
1548: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1549: undef,1);
1550: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1551: } elsif ($target eq 'tex') {
1552: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1553: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1554: if ($a=~/\S/) {
1555: $a=~s/([^\\])%/$1\\\%/g;
1556: $currentstring .= '\ref{URI: '.$a.'}';
1557: } elsif ($b=~/\S/) {
1558: $currentstring .= '\ref{Anchor: '.$b.'}';
1559: } else {
1560: $currentstring.='';
1561: }
1562: }
1563: return $currentstring;
1564: }
1565:
1566: sub end_a {
1567: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1568: my $currentstring = '';
1569: if ($target eq 'web' || $target eq 'webgrade') {
1570: $currentstring .= $token->[2];
1571: }
1572: return $currentstring;
1573: }
1574:
1575: #-- <li> tag (end tag optional)
1576: sub start_li {
1577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1578: my $currentstring = '';
1579: if ($target eq 'web' || $target eq 'webgrade') {
1580: $currentstring = $token->[4];
1581: } elsif ($target eq 'tex') {
1582: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1583: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1584: #FIXME need to support types i and I
1585: if ($type=~/disc/) {
1586: $currentstring .= ' \item[$\bullet$] ';
1587: } elsif ($type=~/circle/) {
1588: $currentstring .= ' \item[$\circ$] ';
1589: } elsif ($type=~/square/) {
1590: $currentstring .= ' \item[$\diamond$] ';
1591: } elsif ($type eq '1') {
1592: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1593: } elsif ($type eq 'A') {
1594: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1595: } elsif ($type eq 'a') {
1596: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1597: } elsif ($value ne '') {
1598: $currentstring .= ' \item['.$value.'] ';
1599: } else {
1600: $currentstring .= ' \item ';
1601: }
1602: $Apache::londefdef::list_index++;
1603: }
1604: return $currentstring;
1605: }
1606:
1607: sub end_li {
1608: my ($target,$token) = @_;
1609: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1610: if ($target eq 'web' || $target eq 'webgrade') {
1611: $currentstring .= $token->[2];
1612: }
1613: return $currentstring;
1614: }
1615:
1616: #-- <u> tag (end tag required)
1617: sub start_u {
1618: my ($target,$token) = @_;
1619: my $currentstring = '';
1620: if ($target eq 'web' || $target eq 'webgrade') {
1621: $currentstring .= $token->[4];
1622: } elsif ($target eq 'tex') {
1623: &Apache::lonxml::startredirection();
1624: }
1625: return $currentstring;
1626: }
1627:
1628: sub end_u {
1629: my ($target,$token) = @_;
1630: my $currentstring = '';
1631: if ($target eq 'web' || $target eq 'webgrade') {
1632: $currentstring .= $token->[2];
1633: } elsif ($target eq 'tex') {
1634: $currentstring=&Apache::lonxml::endredirection();
1635: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1636: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1637: $currentstring=~s/(\S)\s*$/$1\}/;
1638: }
1639: return $currentstring;
1640: }
1641:
1642: #-- <ul> tag (end tag required)
1643: sub start_ul {
1644: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1645: my $currentstring = &end_p(); # Close off enclosing list.
1646: if ($target eq 'web' || $target eq 'webgrade') {
1647: $currentstring .= $token->[4];
1648: } elsif ($target eq 'tex') {
1649: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1650: $Apache::londefdef::list_index=0;
1651: if ($TeXtype eq 'disc') {
1652: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1653: '\renewcommand{\labelitemii}{$\bullet$}'.
1654: '\renewcommand{\labelitemiii}{$\bullet$}'.
1655: '\renewcommand{\labelitemiv}{$\bullet$}';
1656: } elsif ($TeXtype eq 'circle') {
1657: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1658: '\renewcommand{\labelitemii}{$\circ$}'.
1659: '\renewcommand{\labelitemiii}{$\circ$}'.
1660: '\renewcommand{\labelitemiv}{$\circ$}';
1661: } elsif ($TeXtype eq 'square') {
1662: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1663: '\renewcommand{\labelitemii}{$\diamond$}'.
1664: '\renewcommand{\labelitemiii}{$\diamond$}'.
1665: '\renewcommand{\labelitemiv}{$\diamond$}';
1666: }
1667: $currentstring .= '\strut \begin{itemize}';
1668: }
1669: return $currentstring;
1670: }
1671:
1672: sub end_ul {
1673: my ($target,$token) = @_;
1674: my $currentstring = '';
1675: if ($target eq 'web' || $target eq 'webgrade') {
1676: $currentstring = $token->[2];
1677: } elsif ($target eq 'tex') {
1678: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1679: '\renewcommand{\labelitemii}{$\bullet$}'.
1680: '\renewcommand{\labelitemiii}{$\bullet$}'.
1681: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1682: }
1683: return $currentstring;
1684: }
1685:
1686: #-- <menu> tag (end tag required)
1687: sub start_menu {
1688: my ($target,$token) = @_;
1689: my $currentstring = '';
1690: if ($target eq 'web' || $target eq 'webgrade') {
1691: $currentstring = $token->[4];
1692: } elsif ($target eq 'tex') {
1693: $currentstring = " \\begin{itemize} ";
1694: }
1695: return $currentstring;
1696: }
1697:
1698: sub end_menu {
1699: my ($target,$token) = @_;
1700: my $currentstring = '';
1701: if ($target eq 'web' || $target eq 'webgrade') {
1702: $currentstring = $token->[2];
1703: } elsif ($target eq 'tex') {
1704: $currentstring = " \\end{itemize}";
1705: }
1706: return $currentstring;
1707: }
1708:
1709: #-- <dir> tag (end tag required)
1710: sub start_dir {
1711: my ($target,$token) = @_;
1712: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1713: if ($target eq 'web' || $target eq 'webgrade') {
1714: $currentstring .= $token->[4];
1715: } elsif ($target eq 'tex') {
1716: $currentstring .= " \\begin{itemize} ";
1717: }
1718: return $currentstring;
1719: }
1720:
1721: sub end_dir {
1722: my ($target,$token) = @_;
1723: my $currentstring = '';
1724: if ($target eq 'web' || $target eq 'webgrade') {
1725: $currentstring = $token->[2];
1726: } elsif ($target eq 'tex') {
1727: $currentstring = " \\end{itemize}";
1728: }
1729: return $currentstring;
1730: }
1731:
1732: #-- <ol> tag (end tag required)
1733: sub start_ol {
1734: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1735: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1736: if ($target eq 'web' || $target eq 'webgrade') {
1737: $currentstring .= $token->[4];
1738: } elsif ($target eq 'tex') {
1739: $Apache::londefdef::list_index=0;
1740: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1741: if ($type eq '1') {
1742: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1743: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1744: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1745: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1746: } elsif ($type eq 'A') {
1747: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1748: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1749: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1750: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1751: } elsif ($type eq 'a') {
1752: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1753: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1754: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1755: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1756: } elsif ($type eq 'i') {
1757: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1758: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1759: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1760: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1761: } elsif ($type eq 'I') {
1762: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1763: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1764: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1765: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1766: }
1767: $currentstring .= '\strut \begin{enumerate}';
1768: }
1769: return $currentstring;
1770: }
1771:
1772: sub end_ol {
1773: my ($target,$token) = @_;
1774: my $currentstring = '';
1775: if ($target eq 'web' || $target eq 'webgrade') {
1776: $currentstring = $token->[2];
1777: } elsif ($target eq 'tex') {
1778: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1779: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1780: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1781: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1782: }
1783: return $currentstring;
1784: }
1785:
1786: #-- <dl> tag (end tag required)
1787: sub start_dl {
1788: my ($target,$token) = @_;
1789: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1790: if ($target eq 'web' || $target eq 'webgrade') {
1791: $currentstring .= $token->[4];
1792: } elsif ($target eq 'tex') {
1793: $currentstring .= '\begin{description}';
1794: $Apache::londefdef::DL++;
1795: push(@Apache::londefdef::description,[]);
1796: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1797: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1798: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1799: }
1800: return $currentstring;
1801: }
1802:
1803: sub end_dl {
1804: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1805: my $currentstring = '';
1806: if ($target eq 'web' || $target eq 'webgrade') {
1807: $currentstring = $token->[2];
1808: } elsif ($target eq 'tex') {
1809: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1810: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1811: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1812: $currentstring.=' '.$element.' ';
1813: }
1814: pop(@Apache::londefdef::description);
1815: $currentstring.='\end{description}';
1816: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1817: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1818: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1819: $Apache::londefdef::DL--;
1820: }
1821: return $currentstring;
1822: }
1823:
1824: #-- <dt> tag (end tag optional)
1825: sub start_dt {
1826: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1827: my $currentstring='';
1828: if ($target eq 'web' || $target eq 'webgrade') {
1829: $currentstring = $token->[4];
1830: } elsif ($target eq 'tex') {
1831: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1832: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1833: &Apache::lonxml::startredirection();
1834: $Apache::londefdef::DT[-1]++;
1835: $Apache::londefdef::seenDT[-1]=1;
1836: }
1837: return $currentstring;
1838: }
1839:
1840: sub end_dt {
1841: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1842: my $currentstring = '';
1843: if ($target eq 'web' || $target eq 'webgrade') {
1844: $currentstring = $token->[2];
1845: } elsif ($target eq 'tex') {
1846: if ($Apache::londefdef::DT[-1]) {
1847: my $data=&item_cleanup();
1848: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1849: $Apache::londefdef::DT[-1]--;
1850: }
1851: }
1852: return $currentstring;
1853: }
1854:
1855: sub item_cleanup {
1856: my $item=&Apache::lonxml::endredirection();
1857: $item=~s/\\begin{center}//g;
1858: $item=~s/\\end{center}//g;
1859: return $item;
1860: }
1861:
1862: #-- <dd> tag (end tag optional)
1863: sub start_dd {
1864: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1865: my $currentstring = '';
1866: if ($target eq 'web' || $target eq 'webgrade') {
1867: $currentstring = $token->[4];
1868: } elsif ($target eq 'tex') {
1869: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1870: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1871: if (!$Apache::londefdef::seenDT[-1]) {
1872: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1873: }
1874: push(@{$Apache::londefdef::description[-1]},'');
1875: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1876: $Apache::londefdef::DD[-1]++;
1877: &Apache::lonxml::startredirection();
1878: }
1879: return $currentstring;
1880: }
1881:
1882: sub end_dd {
1883: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1884: my $currentstring = '';
1885: if ($target eq 'web' || $target eq 'webgrade') {
1886: $currentstring = $token->[2];
1887: } elsif ($target eq 'tex') {
1888: $Apache::londefdef::description[-1]->[-1].=
1889: &Apache::lonxml::endredirection().' \vskip 0mm ';
1890: $Apache::londefdef::DD[-1]--;
1891: }
1892: return $currentstring;
1893: }
1894:
1895: #-- <table> tag (end tag required)
1896: # <table> also ends any prior <p> that is not closed.
1897: # but, unless I allow <p>'s to nest, that's the
1898: # only way I could think of to allow <p> in
1899: # <tr> <th> bodies
1900: #
1901: #list of supported attributes: border,width,TeXwidth
1902: sub start_table {
1903: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1904: my $textwidth = '';
1905: my $currentstring = &end_p();
1906: if ($target eq 'web' || $target eq 'webgrade') {
1907: $currentstring .= $token->[4];
1908: } elsif ($target eq 'tex') {
1909: my $aa = {};
1910: push @Apache::londefdef::table, $aa;
1911: $Apache::londefdef::table[-1]{'row_number'} = -1;
1912: #maximum table's width (default coincides with text line length)
1913: if ($#Apache::londefdef::table==0) {
1914: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1915: $textwidth=~/(\d+\.?\d*)/;
1916: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1917: } else {
1918: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1919: #the maximum width of nested table is determined by LATeX width of parent cell
1920: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1921: } else {
1922: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1923: $textwidth=$Apache::londefdef::table[-2]{'width'};
1924: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1925: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1926: }
1927: }
1928: }
1929:
1930: # width either comes forced from the TeXwidth or the width parameters.
1931: # in either case it can be a percentage or absolute width.
1932: # in the width case we ignore absolute width
1933: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1934: if (!defined($TeXwidth)) {
1935: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1936: $safeeval,undef,1);
1937: if ($htmlwidth =~ /%/) {
1938: $TeXwidth = $htmlwidth;
1939: } else {
1940: $TeXwidth = $textwidth;
1941: }
1942: } else {
1943: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1944: }
1945: if ($TeXwidth=~/%/) {
1946: $Apache::londefdef::table[-1]{'percent'}=1;
1947: $TeXwidth=~/(\d+)/;
1948: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1949: } else {
1950: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1951: }
1952: # In the end, however the table width cannot be wider than $textwidth...
1953:
1954: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1955: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1956: }
1957:
1958: #table's border
1959: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1960: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1961: unless (defined $border) { $border = 0; }
1962: if ($border) {
1963: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1964: $Apache::londefdef::table[-1]{'vinc'} = '&';
1965: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1966: } else {
1967: $Apache::londefdef::table[-1]{'hinc'} = '';
1968: $Apache::londefdef::table[-1]{'vinc'} = '&';
1969: $Apache::londefdef::table[-1]{'vvinc'} = '';
1970: }
1971: if ($#Apache::londefdef::table==0) {
1972: # Note that \newline seems to destroy the alignment envs.
1973: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1974: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1975: }
1976: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1977: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1978: $Apache::londefdef::table[-1]{'objectlen'}=[];
1979: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1980: $Apache::londefdef::table[-1]{'maxlen'}=[];
1981: $Apache::londefdef::table[-1]{'minlen'}=[];
1982: $Apache::londefdef::table[-1]{'content'}=[];
1983: $Apache::londefdef::table[-1]{'align'}=[];
1984: $currentstring.='\keephidden{NEW TABLE ENTRY}';
1985:
1986:
1987: }
1988: return $currentstring;
1989: }
1990:
1991: sub end_table {
1992: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1993: my $currentstring = '';
1994: if ($target eq 'web' || $target eq 'webgrade') {
1995: $currentstring = $token->[2];
1996: } elsif ($target eq 'tex') {
1997: my $inmemory = '';
1998: my $output = '';
1999: my $WARNING='';
2000: #width of columns from TeXwidth attributes
2001:
2002: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2003: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2004: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2005: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2006: }
2007: }
2008: }
2009: #free space and number of empty columns
2010: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2011: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2012: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2013: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2014: $empty_columns++;
2015: } else {
2016: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2017: }
2018: }
2019: #boundaries for contents columns
2020: my @min_len=();#columns can not be narrower
2021: my @max_len=();#maximum length of column
2022: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2023: my ($localmin,$localmax)=(0,0);
2024: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2025: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2026: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2027: }
2028: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2029: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2030: }
2031: }
2032: push @min_len, $localmin;
2033: push @max_len, $localmax;
2034: }
2035: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2036: my $localmin=0,;
2037: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2038: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2039: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2040: }
2041: }
2042: if ($max_len[$jn]<$localmin) {
2043: $max_len[$jn]=$localmin;
2044: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2045: }#object size is bigger
2046: if ($min_len[$jn]<$localmin) {
2047: $min_len[$jn]=$localmin;
2048: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2049: }#object size is bigger
2050: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2051: $min_len[$jn]=0;
2052: $max_len[$jn]=0;
2053: }
2054: }
2055: #final adjustment of column width
2056: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2057: my @adjust=();
2058: #step 1. adjustment by maximum value
2059: my $space_neeeded=0;
2060: for (my $jn=0;$jn<=$#max_len;$jn++) {
2061: $space_neeeded=$space_neeeded+$max_len[$jn];
2062: }
2063: if ($space_neeeded<=$available_space) {
2064: for (my $jn=0;$jn<=$#max_len;$jn++) {
2065: if ($fwidth[$jn]==0) {
2066: $fwidth[$jn]=$max_len[$jn];
2067: }
2068: }
2069: } else {
2070: #step 2. adjustment by minimum value (estimation)
2071: $space_neeeded=0;
2072: for (my $jn=0;$jn<=$#min_len;$jn++) {
2073: $space_neeeded+=$min_len[$jn];
2074: }
2075: if ($space_neeeded>$available_space) {
2076: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2077: for (my $jn=0;$jn<=$#max_len;$jn++) {
2078: if ($fwidth[$jn]==0) {
2079: $fwidth[$jn]=$min_len[$jn];
2080: }
2081: }
2082: #check if we have objects which can be scaled
2083: my $how_many_to_scale=0;
2084: my @to_scale=();
2085: for (my $jn=0;$jn<=$#max_len;$jn++) {
2086: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2087: $how_many_to_scale++;
2088: push @to_scale, $jn;
2089: }
2090: }
2091: if ($how_many_to_scale>0) {
2092: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2093: foreach my $jn (@to_scale) {
2094: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2095: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2096: if ($1 ne '') {
2097: my $current_length=&recalc($1);
2098: $current_length=~/(\d+\.?\d*)/;
2099: $current_length=$current_length-$space_to_adjust;
2100: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2101: }
2102: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2103: if ($1 ne '') {
2104: my $current_length=$1;
2105: $current_length=$current_length-$space_to_adjust;
2106: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2107: }
2108: }
2109: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2110: }
2111: }
2112: } else {
2113: #step 3. adjustment over minimal + corrections
2114: my $enlarge_coef=$available_space/$space_neeeded;
2115: my $acsessive=0;
2116: for (my $jn=0;$jn<=$#min_len;$jn++) {
2117: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2118: if ($adjust[$jn]>$max_len[$jn]) {
2119: $fwidth[$jn]=$max_len[$jn];
2120: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2121: $adjust[$jn]=0;
2122: }
2123: }
2124: if ($acsessive>0) {
2125: #we have an excess of space and can redistribute it
2126: my $notempty_columns=0;
2127: for (my $jn=0;$jn<=$#min_len;$jn++) {
2128: if ($adjust[$jn]!=0) {
2129: $notempty_columns++;
2130: }
2131: }
2132: my $per_column=$acsessive/$notempty_columns;
2133: for (my $jn=0;$jn<=$#min_len;$jn++) {
2134: if ($adjust[$jn]!=0) {
2135: $adjust[$jn]+=$per_column;
2136: $fwidth[$jn]=$adjust[$jn];
2137: }
2138: }
2139: } else {
2140: for (my $jn=0;$jn<=$#min_len;$jn++) {
2141: $fwidth[$jn]=$adjust[$jn];
2142: }
2143: }
2144: }
2145: }
2146: #use all available width if it is defined in % or as TeXwidth
2147: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2148: my $current=0;
2149: for (my $i=0;$i<=$#fwidth;$i++) {
2150: $current+=$fwidth[$i];
2151: }
2152: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2153: for (my $i=0;$i<=$#fwidth;$i++) {
2154: $fwidth[$i]*=$coef;
2155: }
2156: }
2157: #removing of empty columns if allowed
2158: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2159: if ($permission eq 'yes') {
2160: my @cleaned_table=();
2161: my @cleaned_header=();
2162: my $colind=0;
2163: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2164: if ($fwidth[$jn]!=0) {
2165: #we need to copy column
2166: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2167: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2168: $cleaned_header[$colind]=$fwidth[$jn];
2169: }
2170: $colind++;
2171: }
2172: }
2173: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2174: @fwidth=@cleaned_header;
2175: }
2176: #construct header of the table
2177: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2178: for (my $in=0;$in<=$#fwidth;$in++) {
2179: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2180: }
2181: $header_of_table .= '}';
2182: #fill the table
2183: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2184: my $have_rowspan = 0;
2185: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2186:
2187: #-----------------------------------------------------------
2188: # I think this order of doing things will ensure that
2189: # single rowspan, columspan and combined row/colspans will
2190: # work correctly. LaTeX is delicate here.
2191: # RF.
2192:
2193: # Start a rowspan if necessary:
2194:
2195: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2196: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2197: #
2198: # Do the appropriate magic if this has a colspan
2199: #
2200:
2201: if ($colspan > 1) {
2202: $output .= '\multicolumn{'.
2203: $colspan
2204: .'}{|l|}{';
2205: }
2206:
2207: if ($rowspan > 1) {
2208: $have_rowspan++;
2209: $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
2210: }
2211: if (($rowspan eq '^') || ($rowspan eq '_')) {
2212: $have_rowspan++;
2213: }
2214: #--------------------------------------------------------------
2215:
2216: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2217: $output.=¢er_correction().'\begin{center}';
2218: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2219: $output.=' \hfill \llap{'
2220: }
2221: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2222: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2223: $output.='\end{center}';
2224: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2225: $output.='} ';
2226: }
2227: # Close off any open multirow:
2228:
2229: if ($rowspan > 1) {
2230: $output .= '}';
2231: }
2232: # Close off the colspan...
2233: #
2234: if ($colspan > 1) {
2235: $output .= '}';
2236: $jn += $colspan-1; # Adjust for number of rows really left.
2237: }
2238: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2239: }
2240: # If have_rowspan > 0, and borders are on, then
2241: # we need to do more than put an \hline at the bottom of row.
2242: # we need to do the appropriate \cline to ensure that
2243: # the spanned rows don't have \hlines through them.
2244:
2245: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2246: $output .= ' \\\\ ';
2247: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2248: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2249: if ($rowspan ne "^") {
2250: if (($rowspan <= 1) || ($rowspan eq '_')) {
2251: my $column = $jn+1;
2252: $output .= '\cline{'.$column.'-'.$column.'} ';
2253: }
2254: }
2255: }
2256:
2257: } else {
2258: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2259: }
2260: }
2261: # Note that \newline destroys alignment env's produced by e.g. <div>
2262: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2263: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2264: if ($#Apache::londefdef::table > 0) {
2265: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2266: # Figure out max/and min width by summing us and then
2267: # apply that to the current column of the table we nest in
2268: # if it's larger than the current width or the current width
2269: # is undefined.
2270: #
2271: my $min_nested_width = 0;
2272: my $max_nested_width = 0;
2273: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2274: $min_nested_width += $min_len[$col];
2275: $max_nested_width += $max_len[$col];
2276:
2277: }
2278: # Fudge in an extra 5 mm for borders etc:
2279:
2280: $min_nested_width += 5;
2281: $max_nested_width += 5;
2282:
2283: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2284: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2285: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2286: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2287: }
2288: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2289: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2290: }
2291:
2292: pop @Apache::londefdef::table;
2293: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2294: } else {
2295: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2296: pop @Apache::londefdef::table;
2297: undef @Apache::londefdef::table;
2298: }
2299: }
2300: return $currentstring;
2301: }
2302:
2303: #-- <tr> tag (end tag optional)
2304: sub start_tr {
2305: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2306: my $currentstring = '';
2307: if ($target eq 'web' || $target eq 'webgrade') {
2308: $currentstring = $token->[4];
2309: } elsif ($target eq 'tex') {
2310: $Apache::londefdef::table[-1]{'row_number'}++;
2311: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2312: if ($alignchar ne '') {
2313: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2314: } else {
2315: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2316: }
2317: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2318: #
2319: # Need to save the number of table columns to preserve the max # columns.
2320: #
2321: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2322: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2323: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2324: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2325: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2326: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2327: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2328: }
2329: return $currentstring;
2330: }
2331:
2332: sub end_tr {
2333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2334: my $currentstring = &end_p(); # Close any pending <p> in the row.
2335: if ($target eq 'web' || $target eq 'webgrade') {
2336: $currentstring .= $token->[2];
2337: } elsif ($target eq 'tex') {
2338: if ($Apache::londefdef::TD_redirection) {
2339: &end_td_tex($parstack,$parser,$safeeval);
2340: }
2341: # Counter columns must be the maximum number of columns seen
2342: # in the table so far so:
2343: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2344: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2345: }
2346:
2347:
2348:
2349: }
2350: return $currentstring;
2351: }
2352:
2353: #-- <td> tag (end tag optional)
2354: sub start_td {
2355: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2356: my $currentstring = '';
2357: if ($target eq 'web' || $target eq 'webgrade') {
2358: $currentstring = $token->[4];
2359: } elsif ($target eq 'tex') {
2360: $Apache::londefdef::TD_redirection = 1;
2361: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2362: }
2363: return $currentstring;
2364: }
2365:
2366: sub tag_check {
2367: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2368: my @ar=@$parstack;
2369: for (my $i=$#ar-1;$i>=0;$i--) {
2370: if (lc($$tagstack[$i]) eq $good_tag) {
2371: &start_td_tex($parstack,$parser,$safeeval);
2372: last;
2373: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2374: splice @ar, $i+1;
2375: &end_td_tex(\@ar,$parser,$safeeval);
2376: &start_td_tex($parstack,$parser,$safeeval);
2377: last;
2378: }
2379: }
2380: return '';
2381: }
2382:
2383: sub start_td_tex {
2384: my ($parstack,$parser,$safeeval) = @_;
2385: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2386: if ($alignchar eq '') {
2387: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2388: }
2389: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2390: $Apache::londefdef::table[-1]{'counter_columns'}++;
2391: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2392: if (defined $TeXwidth) {
2393: my $current_length=&recalc($TeXwidth);
2394: $current_length=~/(\d+\.?\d*)/;
2395: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2396: }
2397: &Apache::lonxml::startredirection();
2398: return '';
2399: }
2400:
2401: sub end_td_tex {
2402: my ($parstack,$parser,$safeeval) = @_;
2403: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2404: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2405: my $data = &Apache::lonxml::endredirection();
2406:
2407: # The rowspan array of the table indicates which cells are part of a span.
2408: # n indicates the start of a span set of n rows.
2409: # ^ indicates a cell that continues a span set.
2410: # _ indicates the cell is at the bottom of a span set.
2411: # If this and subsequent cells are part of a rowspan, we must
2412: # push along the row until we find one that is not.
2413:
2414: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2415: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2416: # Part of a span.
2417: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2418: $current_column++;
2419: }
2420: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2421:
2422:
2423: # Get the column and row spans.
2424: # Colspan can be done via \multicolumn if I can figure out the data structs.
2425:
2426: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2427: if (!$colspan) {
2428: $colspan = 1;
2429: }
2430:
2431: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2432: if (!$rowspan) {
2433: $rowspan = 1;
2434: }
2435:
2436:
2437:
2438: for (my $c = 0; $c < $colspan; $c++) {
2439: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2440: for (my $i = 1; $i < $rowspan; $i++) {
2441: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2442: if ($i == ($rowspan-1)) {
2443: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2444: }
2445: }
2446: }
2447:
2448: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2449: if (defined $TeXwidth) {
2450: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2451: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2452: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2453: } else {
2454: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2455: my $garbage_data=$data;
2456: my $fwidth=0;
2457: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2458: my $current_length=&recalc($1);
2459: $current_length=~/(\d+\.?\d*)/;
2460: if ($fwidth<$1) {$fwidth=$1;}
2461: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2462: }
2463: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2464: my $current_length=$1;
2465: if ($fwidth<$current_length) {$fwidth=$current_length;}
2466: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2467: }
2468: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2469: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2470: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2471: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2472: } elsif ($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)*/) {
2473: my $garbage_data=$data;
2474: my $fwidth=0;
2475: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2476: my $current_length=&recalc($1);
2477: $current_length=~/(\d+\.?\d*)/;
2478: if ($fwidth<$1) {$fwidth=$1;}
2479: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2480: }
2481: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2482: my $current_length=&recalc($1);
2483: $current_length=~/(\d+\.?\d*)/;
2484: if ($fwidth<$1) {$fwidth=$1;}
2485: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2486: }
2487: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2488: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2489: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2490: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2491: $data=~s/\\\\\s*$//;
2492: } else {
2493: $data=~s/^\s+(\S.*)/$1/;
2494: $data=~s/(.*\S)\s+$/$1/;
2495: $data=~s/(\s)+/$1/;
2496: my ($current_length,$min_length)=(0,0);
2497: if ($data=~/\\vskip/) {
2498: my $newdata=$data;
2499: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2500: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2501: foreach my $elementdata (@newdata) {
2502: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2503: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2504: my @words=split(/ /,$elementdata);
2505: foreach my $word (@words) {
2506: my $lengthword=2.5*&LATEX_length($word);
2507: if ($min_length<$lengthword) {$min_length=$lengthword;}
2508: }
2509: }
2510: } else {
2511: $current_length=2.5*&LATEX_length($data);
2512: my @words=split(/ /,$data);
2513: foreach my $word (@words) {
2514: my $lengthword=2*&LATEX_length($word);
2515: if ($min_length<$lengthword) {$min_length=$lengthword;}
2516: }
2517: }
2518: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2519: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2520: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2521: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2522: }
2523: }
2524: # Substitute all of the tables nested in this cell in their appropriate places.
2525:
2526:
2527: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2528: for (my $in=0; $in<=$nested_count; $in++) {
2529: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2530: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2531: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2532: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2533:
2534: }
2535: # Should be be killing off the 'include' elements as they're used up?
2536:
2537: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2538:
2539:
2540:
2541:
2542: # the colspan array will indicate how many columns will be spanned by this
2543: # cell..this requires that counter_columns also be adjusted accordingly
2544: # so that the next bunch of text goes in the right cell. Note that since
2545: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2546: #
2547:
2548: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2549: for (my $i = 0; $i < ($colspan -1); $i++) {
2550: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2551: }
2552: for (my $r = 0; $r < $rowspan; $r++) {
2553: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2554: # Put empty text in spanned cols.
2555:
2556: }
2557:
2558:
2559:
2560: return '';
2561: }
2562:
2563: sub end_td {
2564: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2565: my $currentstring = '';
2566: if ($target eq 'web' || $target eq 'webgrade') {
2567: $currentstring = $token->[2];
2568: } elsif ($target eq 'tex') {
2569: $Apache::londefdef::TD_redirection =0;
2570: &end_td_tex($parstack,$parser,$safeeval);
2571: }
2572: return $currentstring;
2573: }
2574:
2575: #-- <th> tag (end tag optional)
2576: sub start_th {
2577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2578: my $currentstring = '';
2579: if ($target eq 'web' || $target eq 'webgrade') {
2580: $currentstring = $token->[4];
2581: } elsif ($target eq 'tex') {
2582: $Apache::londefdef::TD_redirection = 1;
2583: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2584: }
2585: return $currentstring;
2586: }
2587:
2588: sub tagg_check {
2589: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2590: my @ar=@$parstack;
2591: for (my $i=$#ar-1;$i>=0;$i--) {
2592: if (lc($$tagstack[$i]) eq $good_tag) {
2593: &start_th_tex($parstack,$parser,$safeeval);
2594: last;
2595: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2596: splice @ar, $i+1;
2597: &end_th_tex(\@ar,$parser,$safeeval);
2598: &start_th_tex($parstack,$parser,$safeeval);
2599: last;
2600: }
2601: }
2602: return '';
2603: }
2604:
2605: sub start_th_tex {
2606: my ($parstack,$parser,$safeeval) = @_;
2607: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2608: if ($alignchar eq '') {
2609: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2610: }
2611: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2612: $Apache::londefdef::table[-1]{'counter_columns'}++;
2613: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2614: if (defined $TeXwidth) {
2615: my $current_length=&recalc($TeXwidth);
2616: $current_length=~/(\d+\.?\d*)/;
2617: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2618: }
2619: &Apache::lonxml::startredirection();
2620: return '';
2621: }
2622:
2623: sub end_th_tex {
2624: my ($parstack,$parser,$safeeval) = @_;
2625: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2626: my $data=&Apache::lonxml::endredirection();
2627: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2628: if (defined $TeXwidth) {
2629: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2630: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2631: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2632: } else {
2633: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2634: my $garbage_data=$data;
2635: my $fwidth=0;
2636: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2637: my $current_length=&recalc($1);
2638: $current_length=~/(\d+\.?\d*)/;
2639: if ($fwidth<$1) {$fwidth=$1;}
2640: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2641: }
2642: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2643: my $current_length=$1;
2644: if ($fwidth<$current_length) {$fwidth=$current_length;}
2645: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2646: }
2647: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2648: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2649: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2650: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2651: } else {
2652: $data=~s/^\s+(\S.*)/$1/;
2653: $data=~s/(.*\S)\s+$/$1/;
2654: $data=~s/(\s)+/$1/;
2655: my ($current_length,$min_length)=(0,0);
2656: if ($data=~/\\vskip/) {
2657: my $newdata=$data;
2658: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2659: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2660: foreach my $elementdata (@newdata) {
2661: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2662: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2663: my @words=split(/ /,$elementdata);
2664: foreach my $word (@words) {
2665: my $lengthword=2.5*&LATEX_length($word);
2666: if ($min_length<$lengthword) {$min_length=$lengthword;}
2667: }
2668: }
2669: } else {
2670: $current_length=2.5*&LATEX_length($data);
2671: my @words=split(/ /,$data);
2672: foreach my $word (@words) {
2673: my $lengthword=2*&LATEX_length($word);
2674: if ($min_length<$lengthword) {$min_length=$lengthword;}
2675: }
2676: }
2677: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2678: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2679: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2680: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2681: }
2682: }
2683: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2684: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2685: }
2686: #make data bold
2687: $data='\textbf{'.$data.'}';
2688: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2689: return'';
2690: }
2691:
2692: sub end_th {
2693: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2694: my $currentstring = &end_p(); # Close any open <p> in the row.
2695: if ($target eq 'web' || $target eq 'webgrade') {
2696: $currentstring .= $token->[2];
2697: } elsif ($target eq 'tex') {
2698: $Apache::londefdef::TD_redirection =0;
2699: &end_th_tex($parstack,$parser,$safeeval);
2700: }
2701: return $currentstring;
2702: }
2703:
2704: #-- <img> tag (end tag forbidden)
2705: #
2706: # Render the <IMG> tag.
2707: # <IMG> has the following attributes (in addition to the
2708: # standard HTML ones:
2709: # TeXwrap - Governs how the tex target will try to wrap text around
2710: # horizontally aligned images.
2711: # TeXwidth - The width of the image when rendered for print (mm).
2712: # TeXheight - The height of the image when rendered for print (mm)
2713: # (Note there seems to also be support for this as a % of page size)
2714: #
2715: sub start_img {
2716: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2717: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2718: undef,1);
2719: if (! $src &&
2720: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2721: ) {
2722: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2723: return '';
2724: }
2725: &Apache::lonxml::extlink($src);
2726: my $currentstring = '';
2727: my $scaling = .3;
2728:
2729: # Render unto browsers that which are the browser's...
2730:
2731: if ($target eq 'web' || $target eq 'webgrade') {
2732: if ($env{'browser.imagesuppress'} ne 'on') {
2733: my $enc = ('yes' eq
2734: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2735: $safeeval)));
2736: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2737: $enc);
2738: } else {
2739: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2740: undef,1);
2741: if (!$alttag) {
2742: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2743: $src);
2744: }
2745: $currentstring.='[IMAGE: '.$alttag.']';
2746: }
2747:
2748: # and render unto TeX that which is LaTeX
2749:
2750: } elsif ($target eq 'tex') {
2751: #
2752: # The alignment will require some superstructure to be put around
2753: # the \includegraphics stuff. At present we can only partially
2754: # simulate the alignments offered by html.
2755: #
2756: #
2757: my $align = lc(&Apache::lonxml::get_param('align',
2758: $parstack,
2759: $safeeval,
2760: undef,1));
2761: if(!$align) {
2762: $align = "bottom"; # This is html's default so it's ours too.
2763: }
2764: #
2765: &Apache::lonxml::debug("Alignemnt = $align");
2766: # LaTeX's image/text wrapping is really bad since it wants to
2767: # make figures float.
2768: # The user has the optional parameter (applicable only to l/r
2769: # alignment to use the picins/parpic directive to get wrapped text
2770: # this is also imperfect.. that's why we give them a choice...
2771: # so they can't yell at us for our choice.
2772: #
2773: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2774: $parstack,
2775: $safeeval,
2776: undef,0);
2777: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2778: if(!$latex_rendering) {
2779: $latex_rendering = "texwrap";
2780: }
2781: # using texwrap inside a table does not work. So, if after all of this,
2782: # texwrap is on, we turn it off if we detect we're in a table:
2783: #
2784: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2785: $latex_rendering = 'parpic';
2786: }
2787:
2788: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2789:
2790: #if original gif/jpg/png file exist do following:
2791: my $origsrc=$src;
2792: my ($path,$file) = &get_eps_image($src);
2793: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2794: &Apache::lonxml::debug("path = $path file = $file src = $src");
2795: if (-e $src) {
2796: &Apache::lonxml::debug("$src exists");
2797: my ($height_param,$width_param)=
2798: &image_size($origsrc,0.3,$parstack,$safeeval);
2799: my $destpath = $path;
2800: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2801: my $destfile = $file;
2802: $destfile =~ s/ /\_/g;
2803: my $size;
2804: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2805: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2806: $size='['.$size;
2807: $size=~s/,$/]/;
2808: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2809: .'\includegraphics'.$size.'{'.$destfile.'} ';
2810:
2811: # If there's an alignment specification we need to honor it here.
2812: # For the horizontal alignments, we will also honor the
2813: # value of the latex specfication. The default is parbox,
2814: # and that's used for illegal values too.
2815: #
2816: # Even though we set a default alignment value, the user
2817: # could have given us an illegal value. In that case we
2818: # just use the default alignment of bottom..
2819: if ($align eq "top") {
2820: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2821: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2822: my $offset = $height_param/2;
2823: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2824: } elsif ($align eq "left") {
2825: if ($latex_rendering eq "parpic") {
2826: $currentstring = '\parpic[l]{'.$currentstring.'}';
2827: } else { # wrapfig render
2828: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2829: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2830: }
2831: } elsif ($align eq "right") {
2832: if ($latex_rendering eq "parpic") {
2833: $currentstring = '\parpic[r]{'.$currentstring.'}';
2834: } else { # wrapfig rendering
2835: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2836: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2837:
2838: }
2839: } else { # Bottom is also default.
2840: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2841: }
2842: } else {
2843: &Apache::lonxml::debug("$src does not exist");
2844: #original image file doesn't exist so check the alt attribute
2845: my $alt =
2846: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2847: unless ($alt) {
2848: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2849: }
2850:
2851: if ($alt) { $currentstring .= ' '.$alt.' '; }
2852: }
2853:
2854: # And here's where the semi-quote breaks down: allow the user
2855: # to edit the beast as well by rendering the problem for edit:
2856: } elsif ($target eq 'edit') {
2857: $currentstring .=&Apache::edit::tag_start($target,$token);
2858: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2859: &Apache::edit::browse('src',undef,'alt').' '.
2860: &Apache::edit::search('src',undef,'alt').'<br />';
2861: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2862: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2863: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2864: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2865: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2866: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2867: ['','bottom','middle','top','left','right'],$token,5);
2868: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2869: ['', 'parbox', 'parpic'], $token, 2);
2870: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2871: ['no','yes'], $token, 2);
2872: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2873: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2874: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2875: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2876: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2877:
2878:
2879: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2880: if ($width) { $currentstring.=' width="'.$width.'" '; }
2881: if ($height) { $currentstring.=' height="'.$height.'" '; }
2882: $currentstring .= ' />';
2883: } elsif ($target eq 'modified') {
2884: my ($osrc,$owidth,$oheight)=
2885: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2886: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2887: $safeeval,'src','alt','align',
2888: 'TeXwidth','TeXheight', 'TeXwrap',
2889: 'width','height','encrypturl');
2890: my ($nsrc,$nwidth,$nheight)=
2891: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2892: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2893: &image_replication($loc);
2894: my ($iwidth,$iheight);
2895: if (-e $loc) {
2896: my $image = Image::Magick->new;
2897: $image->Read($loc);
2898: ($iwidth, $iheight) = ($image->Get('width'),
2899: $image->Get('height'));
2900: }
2901: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2902: # changed image or no size specified,
2903: # if they didn't explicitly change the
2904: # width or height use the ones from the image
2905: if ($iwidth && $iheight) {
2906: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2907: $token->[2]{'width'} = $iwidth;$ctag=1;
2908: }
2909: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2910: $token->[2]{'height'}=$iheight;$ctag=1;
2911: }
2912: }
2913: }
2914: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2915: # if we don't have a width or height
2916: if ($iwidth && $cwidth && !$cheight) {
2917: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2918: }
2919: if ($iheight && $cheight && !$cwidth) {
2920: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2921: }
2922: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2923: }
2924:
2925: return $currentstring;
2926: }
2927:
2928: sub end_img {
2929: my ($target,$token) = @_;
2930: my $currentstring = '';
2931: if ($target eq 'web' || $target eq 'webgrade') {
2932: $currentstring = $token->[2];
2933: } elsif ($target eq 'tex') {
2934: $currentstring = '';
2935: }
2936: return $currentstring;
2937: }
2938:
2939: #-- <applet> tag (end tag required)
2940: sub start_applet {
2941: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2942:
2943: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2944: &Apache::lonxml::extlink($code);
2945: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2946: undef,1);
2947: &Apache::lonxml::extlink($archive);
2948: my $currentstring = '';
2949: if ($target eq 'web' || $target eq 'webgrade') {
2950: if ($env{'browser.appletsuppress'} ne 'on') {
2951: $currentstring = &Apache::lonenc::encrypt_ref($token,
2952: {'code'=>$code,
2953: 'archive'=>$archive}
2954: );
2955: } else {
2956: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2957: $safeeval,undef,1);
2958: unless ($alttag) {
2959: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2960: $code);
2961: }
2962: $currentstring='[APPLET: '.$alttag.']';
2963: }
2964: } elsif ($target eq 'tex') {
2965: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2966: $safeeval,undef,1);
2967: unless ($alttag) {
2968: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2969: undef,1);
2970: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2971: $code);
2972: }
2973: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2974: '.}\end{center}';
2975: }
2976: return $currentstring;
2977: }
2978:
2979: sub end_applet {
2980: my ($target,$token) = @_;
2981: my $currentstring = '';
2982: if ($target eq 'web' || $target eq 'webgrade') {
2983: $currentstring = $token->[2];
2984: } elsif ($target eq 'tex') {
2985: }
2986: return $currentstring;
2987: }
2988:
2989: #-- <embed> tag (end tag optional/required)
2990: sub start_embed {
2991: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2992: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2993: &Apache::lonxml::extlink($src);
2994: my $currentstring = '';
2995: if ($target eq 'web' || $target eq 'webgrade') {
2996: if ($env{'browser.embedsuppress'} ne 'on') {
2997: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2998: } else {
2999: my $alttag=&Apache::lonxml::get_param
3000: ('alt',$parstack,$safeeval,undef,1);
3001: unless ($alttag) {
3002: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3003: }
3004: $currentstring='[EMBED: '.$alttag.']';
3005: }
3006: } elsif ($target eq 'tex') {
3007: }
3008: return $currentstring;
3009: }
3010:
3011: sub end_embed {
3012: my ($target,$token) = @_;
3013: my $currentstring = '';
3014: if ($target eq 'web' || $target eq 'webgrade') {
3015: $currentstring = $token->[2];
3016: } elsif ($target eq 'tex') {
3017: }
3018: return $currentstring;
3019: }
3020:
3021: #-- <param> tag (end tag forbidden)
3022: sub start_param {
3023: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3024: if (&Apache::lonxml::get_param('name',$parstack,
3025: $safeeval,undef,1)=~/^cabbase$/i) {
3026: my $value=&Apache::lonxml::get_param('value',$parstack,
3027: $safeeval,undef,1);
3028: &Apache::lonxml::extlink($value);
3029: }
3030:
3031: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3032: &Apache::lonxml::extlink($src);
3033: my $currentstring = '';
3034: if ($target eq 'web' || $target eq 'webgrade') {
3035: my %toconvert;
3036: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3037: if ($src) { $toconvert{'src'}= $src; }
3038: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3039: undef,1);
3040: if ($name=~/^cabbase$/i) {
3041: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3042: $safeeval,undef,1);
3043: }
3044: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3045: } elsif ($target eq 'tex') {
3046: }
3047: return $currentstring;
3048: }
3049:
3050: sub end_param {
3051: my ($target,$token) = @_;
3052: my $currentstring = '';
3053: if ($target eq 'web' || $target eq 'webgrade') {
3054: $currentstring = $token->[2];
3055: } elsif ($target eq 'tex') {
3056: }
3057: return $currentstring;
3058: }
3059:
3060: #-- <allow> tag
3061: sub start_allow {
3062: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3063: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3064: &Apache::lonxml::extlink($src);
3065:
3066: if ($target eq 'tex') { &image_replication($src); }
3067: my $result;
3068: if ($target eq 'edit') {
3069: $result .=&Apache::edit::tag_start($target,$token);
3070: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3071: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3072: } elsif ($target eq 'modified') {
3073: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3074: $safeeval,'src');
3075: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3076: }
3077: return $result;
3078: }
3079:
3080: sub end_allow {
3081: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3082: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3083: return '';
3084: }
3085:
3086: #-- Frames (end tag required)
3087: #-- <frameset>
3088: sub start_frameset {
3089: my ($target,$token) = @_;
3090: my $currentstring = ''; # Close any pending para.
3091: if ($target eq 'web' || $target eq 'webgrade') {
3092: $currentstring =
3093: &Apache::loncommon::start_page($Apache::londefdef::title,
3094: $Apache::londefdef::head,
3095: {'add_entries' => $token->[2],
3096: 'no_title' => 1,
3097: 'force_register' => 1,
3098: 'frameset' => 1,});
3099:
3100: }
3101: return $currentstring;
3102: }
3103:
3104: sub end_frameset {
3105: my ($target,$token) = @_;
3106: my $currentstring = '';
3107: if ($target eq 'web' || $target eq 'webgrade') {
3108: $currentstring = $token->[2];
3109: }
3110: return $currentstring;
3111: }
3112:
3113: #-- <xmp> (end tag required)
3114: sub start_xmp {
3115: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3116: my $currentstring = '';
3117: if ($target eq 'web' || $target eq 'webgrade') {
3118: $currentstring .= $token->[4];
3119: } elsif ($target eq 'tex') {
3120: $currentstring .= '\begin{verbatim}';
3121: }
3122: return $currentstring;
3123: }
3124:
3125: sub end_xmp {
3126: my ($target,$token) = @_;
3127: my $currentstring = '';
3128: if ($target eq 'web' || $target eq 'webgrade') {
3129: $currentstring .= $token->[2];
3130: } elsif ($target eq 'tex') {
3131: $currentstring .= '\end{verbatim}';
3132: }
3133: return $currentstring;
3134: }
3135:
3136: #-- <pre> (end tag required)
3137: sub start_pre {
3138: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3139: my $currentstring = &end_p(); # close off pending <p>
3140: if ($target eq 'web' || $target eq 'webgrade') {
3141: $currentstring .= $token->[4];
3142: } elsif ($target eq 'tex') {
3143: $currentstring .= '\begin{verbatim}';
3144: &Apache::lonxml::disable_LaTeX_substitutions();
3145: }
3146: return $currentstring;
3147: }
3148:
3149: sub end_pre {
3150: my ($target,$token) = @_;
3151: my $currentstring = '';
3152: if ($target eq 'web' || $target eq 'webgrade') {
3153: $currentstring .= $token->[2];
3154: } elsif ($target eq 'tex') {
3155: $currentstring .= '\end{verbatim}';
3156: &Apache::lonxml::enable_LaTeX_substitutions();
3157: }
3158: return $currentstring;
3159: }
3160:
3161: #-- <insert>
3162: sub start_insert {
3163: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3164: my $currentstring = '';
3165: if ($target eq 'web' || $target eq 'webgrade') {
3166: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3167: $currentstring .= '<b>'.$display.'</b>';;
3168: }
3169: return $currentstring;
3170: }
3171:
3172: sub end_insert {
3173: my ($target,$token) = @_;
3174: my $currentstring = '';
3175: if ($target eq 'web' || $target eq 'webgrade') {
3176: $currentstring .= '';
3177: }
3178: return $currentstring;
3179: }
3180:
3181: #-- <externallink>
3182: sub start_externallink {
3183: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3184: my $currentstring = '';
3185: if ($target eq 'web' || $target eq 'webgrade') {
3186: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3187: $currentstring .= '<b>'.$display.'</b>';;
3188: }
3189: return $currentstring;
3190: }
3191:
3192: sub end_externallink {
3193: my ($target,$token) = @_;
3194: my $currentstring = '';
3195: if ($target eq 'web' || $target eq 'webgrade') {
3196: $currentstring .= '';
3197: }
3198: return $currentstring;
3199: }
3200:
3201: #-- <blankspace heigth="">
3202: sub start_blankspace {
3203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3204: my $currentstring = &end_p(); # closes off any unclosed <p>
3205: if ($target eq 'tex') {
3206: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3207: $currentstring .= '\vskip '.$howmuch.' ';
3208: }
3209: return $currentstring;
3210: }
3211:
3212: sub end_blankspace {
3213: my ($target,$token) = @_;
3214: my $currentstring = '';
3215: if ($target eq 'tex') {
3216: $currentstring .= '';
3217: }
3218: return $currentstring;
3219: }
3220:
3221: #-- <abbr> tag (end tag required)
3222: sub start_abbr {
3223: my ($target,$token) = @_;
3224: my $currentstring = '';
3225: if ($target eq 'web' || $target eq 'webgrade') {
3226: $currentstring = $token->[4];
3227: }
3228: return $currentstring;
3229: }
3230:
3231: sub end_abbr {
3232: my ($target,$token) = @_;
3233: my $currentstring = '';
3234: if ($target eq 'web' || $target eq 'webgrade') {
3235: $currentstring = $token->[2];
3236: }
3237: return $currentstring;
3238: }
3239:
3240: #-- <acronym> tag (end tag required)
3241: sub start_acronym {
3242: my ($target,$token) = @_;
3243: my $currentstring = '';
3244: if ($target eq 'web' || $target eq 'webgrade') {
3245: $currentstring = $token->[4];
3246: }
3247: return $currentstring;
3248: }
3249:
3250: sub end_acronym {
3251: my ($target,$token) = @_;
3252: my $currentstring = '';
3253: if ($target eq 'web' || $target eq 'webgrade') {
3254: $currentstring = $token->[2];
3255: }
3256: return $currentstring;
3257: }
3258:
3259: #-- <area> tag (end tag forbidden)
3260: sub start_area {
3261: my ($target,$token) = @_;
3262: my $currentstring = '';
3263: if ($target eq 'web' || $target eq 'webgrade') {
3264: $currentstring = $token->[4];
3265: }
3266: return $currentstring;
3267: }
3268:
3269: sub end_area {
3270: my ($target,$token) = @_;
3271: my $currentstring = '';
3272: if ($target eq 'web' || $target eq 'webgrade') {
3273: $currentstring = $token->[2];
3274: }
3275: return $currentstring;
3276: }
3277:
3278: #-- <base> tag (end tag forbidden)
3279: sub start_base {
3280: my ($target,$token) = @_;
3281: my $currentstring = '';
3282: if ($target eq 'web' || $target eq 'webgrade') {
3283: $currentstring = $token->[4];
3284: }
3285: return $currentstring;
3286: }
3287:
3288: sub end_base {
3289: my ($target,$token) = @_;
3290: my $currentstring = '';
3291: if ($target eq 'web' || $target eq 'webgrade') {
3292: $currentstring = $token->[2];
3293: }
3294: return $currentstring;
3295: }
3296:
3297: #-- <bdo> tag (end tag required)
3298: sub start_bdo {
3299: my ($target,$token) = @_;
3300: my $currentstring = '';
3301: if ($target eq 'web' || $target eq 'webgrade') {
3302: $currentstring = $token->[4];
3303: }
3304: return $currentstring;
3305: }
3306:
3307: sub end_bdo {
3308: my ($target,$token) = @_;
3309: my $currentstring = '';
3310: if ($target eq 'web' || $target eq 'webgrade') {
3311: $currentstring = $token->[2];
3312: }
3313: return $currentstring;
3314: }
3315:
3316: #-- <bgsound> tag (end tag optional)
3317: sub start_bgsound {
3318: my ($target,$token) = @_;
3319: my $currentstring = '';
3320: if ($target eq 'web' || $target eq 'webgrade') {
3321: $currentstring = $token->[4];
3322: }
3323: return $currentstring;
3324: }
3325:
3326: sub end_bgsound {
3327: my ($target,$token) = @_;
3328: my $currentstring = '';
3329: if ($target eq 'web' || $target eq 'webgrade') {
3330: $currentstring = $token->[2];
3331: }
3332: return $currentstring;
3333: }
3334:
3335: #-- <blink> tag (end tag required)
3336: sub start_blink {
3337: my ($target,$token) = @_;
3338: my $currentstring = '';
3339: if ($target eq 'web' || $target eq 'webgrade') {
3340: $currentstring = $token->[4];
3341: }
3342: return $currentstring;
3343: }
3344:
3345: sub end_blink {
3346: my ($target,$token) = @_;
3347: my $currentstring = '';
3348: if ($target eq 'web' || $target eq 'webgrade') {
3349: $currentstring = $token->[2];
3350: }
3351: return $currentstring;
3352: }
3353:
3354: #-- <blockquote> tag (end tag required)
3355: sub start_blockquote {
3356: my ($target,$token) = @_;
3357: my $currentstring = &end_p(); # Close any unclosed <p>
3358: if ($target eq 'web' || $target eq 'webgrade') {
3359: $currentstring .= $token->[4];
3360: }
3361: return $currentstring;
3362: }
3363:
3364: sub end_blockquote {
3365: my ($target,$token) = @_;
3366: my $currentstring = '';
3367: if ($target eq 'web' || $target eq 'webgrade') {
3368: $currentstring = $token->[2];
3369: }
3370: return $currentstring;
3371: }
3372:
3373: #-- <button> tag (end tag required)
3374: sub start_button {
3375: my ($target,$token) = @_;
3376: my $currentstring = '';
3377: if ($target eq 'web' || $target eq 'webgrade') {
3378: $currentstring = $token->[4];
3379: }
3380: return $currentstring;
3381: }
3382:
3383: sub end_button {
3384: my ($target,$token) = @_;
3385: my $currentstring = '';
3386: if ($target eq 'web' || $target eq 'webgrade') {
3387: $currentstring = $token->[2];
3388: }
3389: return $currentstring;
3390: }
3391:
3392: #-- <caption> tag (end tag required)
3393: sub start_caption {
3394: my ($target,$token) = @_;
3395: my $currentstring = '';
3396: if ($target eq 'web' || $target eq 'webgrade') {
3397: $currentstring = $token->[4];
3398: }
3399: return $currentstring;
3400: }
3401:
3402: sub end_caption {
3403: my ($target,$token) = @_;
3404: my $currentstring = '';
3405: if ($target eq 'web' || $target eq 'webgrade') {
3406: $currentstring = $token->[2];
3407: }
3408: return $currentstring;
3409: }
3410:
3411: #-- <col> tag (end tag forbdden)
3412: sub start_col {
3413: my ($target,$token) = @_;
3414: my $currentstring = '';
3415: if ($target eq 'web' || $target eq 'webgrade') {
3416: $currentstring = $token->[4];
3417: }
3418: return $currentstring;
3419: }
3420:
3421: sub end_col {
3422: my ($target,$token) = @_;
3423: my $currentstring = '';
3424: if ($target eq 'web' || $target eq 'webgrade') {
3425: $currentstring = $token->[2];
3426: }
3427: return $currentstring;
3428: }
3429:
3430: #-- <colgroup> tag (end tag optional)
3431: sub start_colgroup {
3432: my ($target,$token) = @_;
3433: my $currentstring = '';
3434: if ($target eq 'web' || $target eq 'webgrade') {
3435: $currentstring = $token->[4];
3436: }
3437: return $currentstring;
3438: }
3439:
3440: sub end_colgroup {
3441: my ($target,$token) = @_;
3442: my $currentstring = '';
3443: if ($target eq 'web' || $target eq 'webgrade') {
3444: $currentstring = $token->[2];
3445: }
3446: return $currentstring;
3447: }
3448:
3449: #-- <del> tag (end tag required)
3450: sub start_del {
3451: my ($target,$token) = @_;
3452: my $currentstring = '';
3453: if ($target eq 'web' || $target eq 'webgrade') {
3454: $currentstring = $token->[4];
3455: }
3456: return $currentstring;
3457: }
3458:
3459: sub end_del {
3460: my ($target,$token) = @_;
3461: my $currentstring = '';
3462: if ($target eq 'web' || $target eq 'webgrade') {
3463: $currentstring = $token->[2];
3464: }
3465: return $currentstring;
3466: }
3467:
3468: #-- <fieldset> tag (end tag required)
3469: sub start_fieldset {
3470: my ($target,$token) = @_;
3471: my $currentstring = '';
3472: if ($target eq 'web' || $target eq 'webgrade') {
3473: $currentstring = $token->[4];
3474: }
3475: return $currentstring;
3476: }
3477:
3478: sub end_fieldset {
3479: my ($target,$token) = @_;
3480: my $currentstring = '';
3481: if ($target eq 'web' || $target eq 'webgrade') {
3482: $currentstring = $token->[2];
3483: }
3484: return $currentstring;
3485: }
3486:
3487: #-- <frame> tag (end tag forbidden)
3488: sub start_frame {
3489: my ($target,$token) = @_;
3490: my $currentstring = '';
3491: if ($target eq 'web' || $target eq 'webgrade') {
3492: $currentstring = $token->[4];
3493: }
3494: return $currentstring;
3495: }
3496:
3497: sub end_frame {
3498: my ($target,$token) = @_;
3499: my $currentstring = '';
3500: if ($target eq 'web' || $target eq 'webgrade') {
3501: $currentstring = $token->[2];
3502: }
3503: return $currentstring;
3504: }
3505:
3506: #-- <iframe> tag (end tag required)
3507: sub start_iframe {
3508: my ($target,$token) = @_;
3509: my $currentstring = '';
3510: if ($target eq 'web' || $target eq 'webgrade') {
3511: $currentstring = $token->[4];
3512: }
3513: return $currentstring;
3514: }
3515:
3516: sub end_iframe {
3517: my ($target,$token) = @_;
3518: my $currentstring = '';
3519: if ($target eq 'web' || $target eq 'webgrade') {
3520: $currentstring = $token->[2];
3521: }
3522: return $currentstring;
3523: }
3524:
3525: #-- <ins> tag (end tag required)
3526: sub start_ins {
3527: my ($target,$token) = @_;
3528: my $currentstring = '';
3529: if ($target eq 'web' || $target eq 'webgrade') {
3530: $currentstring = $token->[4];
3531: }
3532: return $currentstring;
3533: }
3534:
3535: sub end_ins {
3536: my ($target,$token) = @_;
3537: my $currentstring = '';
3538: if ($target eq 'web' || $target eq 'webgrade') {
3539: $currentstring = $token->[2];
3540: }
3541: return $currentstring;
3542: }
3543:
3544: #-- <isindex> tag (end tag forbidden)
3545: sub start_isindex {
3546: my ($target,$token) = @_;
3547: my $currentstring = '';
3548: if ($target eq 'web' || $target eq 'webgrade') {
3549: $currentstring = $token->[4];
3550: }
3551: return $currentstring;
3552: }
3553:
3554: sub end_isindex {
3555: my ($target,$token) = @_;
3556: my $currentstring = '';
3557: if ($target eq 'web' || $target eq 'webgrade') {
3558: $currentstring = $token->[2];
3559: }
3560: return $currentstring;
3561: }
3562:
3563: #-- <keygen> tag (end tag forbidden)
3564: sub start_keygen {
3565: my ($target,$token) = @_;
3566: my $currentstring = '';
3567: if ($target eq 'web' || $target eq 'webgrade') {
3568: $currentstring = $token->[4];
3569: }
3570: return $currentstring;
3571: }
3572:
3573: sub end_keygen {
3574: my ($target,$token) = @_;
3575: my $currentstring = '';
3576: if ($target eq 'web' || $target eq 'webgrade') {
3577: $currentstring = $token->[2];
3578: }
3579: return $currentstring;
3580: }
3581:
3582: #-- <label> tag
3583: sub start_label {
3584: my ($target,$token) = @_;
3585: my $currentstring = '';
3586: if ($target eq 'web' || $target eq 'webgrade') {
3587: $currentstring = $token->[4];
3588: }
3589: return $currentstring;
3590: }
3591:
3592: sub end_label {
3593: my ($target,$token) = @_;
3594: my $currentstring = '';
3595: if ($target eq 'web' || $target eq 'webgrade') {
3596: $currentstring = $token->[2];
3597: }
3598: return $currentstring;
3599: }
3600:
3601: #-- <layer> tag (end tag required)
3602: sub start_layer {
3603: my ($target,$token) = @_;
3604: my $currentstring = '';
3605: if ($target eq 'web' || $target eq 'webgrade') {
3606: $currentstring = $token->[4];
3607: }
3608: return $currentstring;
3609: }
3610:
3611: sub end_layer {
3612: my ($target,$token) = @_;
3613: my $currentstring = '';
3614: if ($target eq 'web' || $target eq 'webgrade') {
3615: $currentstring = $token->[2];
3616: }
3617: return $currentstring;
3618: }
3619:
3620: #-- <legend> tag (end tag required)
3621: sub start_legend {
3622: my ($target,$token) = @_;
3623: my $currentstring = '';
3624: if ($target eq 'web' || $target eq 'webgrade') {
3625: $currentstring = $token->[4];
3626: }
3627: return $currentstring;
3628: }
3629:
3630: sub end_legend {
3631: my ($target,$token) = @_;
3632: my $currentstring = '';
3633: if ($target eq 'web' || $target eq 'webgrade') {
3634: $currentstring = $token->[2];
3635: }
3636: return $currentstring;
3637: }
3638:
3639: #-- <link> tag (end tag forbidden)
3640: sub start_link {
3641: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3642: my $currentstring = '';
3643: if ($target eq 'web' || $target eq 'webgrade') {
3644: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3645: undef,1);
3646: &Apache::lonxml::extlink($href);
3647: $currentstring = $token->[4];
3648: }
3649: return $currentstring;
3650: }
3651:
3652: sub end_link {
3653: my ($target,$token) = @_;
3654: my $currentstring = '';
3655: if ($target eq 'web' || $target eq 'webgrade') {
3656: $currentstring = $token->[2];
3657: }
3658: return $currentstring;
3659: }
3660:
3661: #-- <marquee> tag (end tag optional)
3662: sub start_marquee {
3663: my ($target,$token) = @_;
3664: my $currentstring = '';
3665: if ($target eq 'web' || $target eq 'webgrade') {
3666: $currentstring = $token->[4];
3667: }
3668: return $currentstring;
3669: }
3670:
3671: sub end_marquee {
3672: my ($target,$token) = @_;
3673: my $currentstring = '';
3674: if ($target eq 'web' || $target eq 'webgrade') {
3675: $currentstring = $token->[2];
3676: }
3677: return $currentstring;
3678: }
3679:
3680: #-- <multicol> tag (end tag required)
3681: sub start_multicol {
3682: my ($target,$token) = @_;
3683: my $currentstring = &end_p(); # Close any pending <p>
3684: if ($target eq 'web' || $target eq 'webgrade') {
3685: $currentstring .= $token->[4];
3686: }
3687: return $currentstring;
3688: }
3689:
3690: sub end_multicol {
3691: my ($target,$token) = @_;
3692: my $currentstring = '';
3693: if ($target eq 'web' || $target eq 'webgrade') {
3694: $currentstring = $token->[2];
3695: }
3696: return $currentstring;
3697: }
3698:
3699: #-- <nobr> tag (end tag required)
3700: sub start_nobr {
3701: my ($target,$token) = @_;
3702: my $currentstring = '';
3703: if ($target eq 'web' || $target eq 'webgrade') {
3704: $currentstring = $token->[4];
3705: } elsif ($target eq 'tex') {
3706: $currentstring='\mbox{';
3707: }
3708: return $currentstring;
3709: }
3710:
3711: sub end_nobr {
3712: my ($target,$token) = @_;
3713: my $currentstring = '';
3714: if ($target eq 'web' || $target eq 'webgrade') {
3715: $currentstring = $token->[2];
3716: } elsif ($target eq 'tex') {
3717: $currentstring='}';
3718: }
3719: return $currentstring;
3720: }
3721:
3722: #-- <noembed> tag (end tag required)
3723: sub start_noembed {
3724: my ($target,$token) = @_;
3725: my $currentstring = '';
3726: if ($target eq 'web' || $target eq 'webgrade') {
3727: $currentstring = $token->[4];
3728: }
3729: return $currentstring;
3730: }
3731:
3732: sub end_noembed {
3733: my ($target,$token) = @_;
3734: my $currentstring = '';
3735: if ($target eq 'web' || $target eq 'webgrade') {
3736: $currentstring = $token->[2];
3737: }
3738: return $currentstring;
3739: }
3740:
3741: #-- <noframes> tag (end tag required)
3742: sub start_noframes {
3743: my ($target,$token) = @_;
3744: my $currentstring = '';
3745: if ($target eq 'web' || $target eq 'webgrade') {
3746: $currentstring = $token->[4];
3747: }
3748: return $currentstring;
3749: }
3750:
3751: sub end_noframes {
3752: my ($target,$token) = @_;
3753: my $currentstring = '';
3754: if ($target eq 'web' || $target eq 'webgrade') {
3755: $currentstring = $token->[2];
3756: }
3757: return $currentstring;
3758: }
3759:
3760: #-- <nolayer> tag (end tag required)
3761: sub start_nolayer {
3762: my ($target,$token) = @_;
3763: my $currentstring = '';
3764: if ($target eq 'web' || $target eq 'webgrade') {
3765: $currentstring = $token->[4];
3766: }
3767: return $currentstring;
3768: }
3769:
3770: sub end_nolayer {
3771: my ($target,$token) = @_;
3772: my $currentstring = '';
3773: if ($target eq 'web' || $target eq 'webgrade') {
3774: $currentstring = $token->[2];
3775: }
3776: return $currentstring;
3777: }
3778:
3779: #-- <noscript> tag (end tag required)
3780: sub start_noscript {
3781: my ($target,$token) = @_;
3782: my $currentstring = '';
3783: if ($target eq 'web' || $target eq 'webgrade') {
3784: $currentstring = $token->[4];
3785: }
3786: return $currentstring;
3787: }
3788:
3789: sub end_noscript {
3790: my ($target,$token) = @_;
3791: my $currentstring = '';
3792: if ($target eq 'web' || $target eq 'webgrade') {
3793: $currentstring = $token->[2];
3794: }
3795: return $currentstring;
3796: }
3797:
3798: #-- <object> tag (end tag required)
3799: sub start_object {
3800: my ($target,$token) = @_;
3801: my $currentstring = '';
3802: if ($target eq 'web' || $target eq 'webgrade') {
3803: $currentstring = $token->[4];
3804: }
3805: return $currentstring;
3806: }
3807:
3808: sub end_object {
3809: my ($target,$token) = @_;
3810: my $currentstring = '';
3811: if ($target eq 'web' || $target eq 'webgrade') {
3812: $currentstring = $token->[2];
3813: }
3814: return $currentstring;
3815: }
3816:
3817: #-- <optgroup> tag (end tag required)
3818: sub start_optgroup {
3819: my ($target,$token) = @_;
3820: my $currentstring = '';
3821: if ($target eq 'web' || $target eq 'webgrade') {
3822: $currentstring = $token->[4];
3823: }
3824: return $currentstring;
3825: }
3826:
3827: sub end_optgroup {
3828: my ($target,$token) = @_;
3829: my $currentstring = '';
3830: if ($target eq 'web' || $target eq 'webgrade') {
3831: $currentstring = $token->[2];
3832: }
3833: return $currentstring;
3834: }
3835:
3836: #-- <samp> tag (end tag required)
3837: sub start_samp {
3838: my ($target,$token) = @_;
3839: my $currentstring = '';
3840: if ($target eq 'web' || $target eq 'webgrade') {
3841: $currentstring = $token->[4];
3842: } elsif ($target eq 'tex') {
3843: $currentstring='\texttt{';
3844: }
3845: return $currentstring;
3846: }
3847:
3848: sub end_samp {
3849: my ($target,$token) = @_;
3850: my $currentstring = '';
3851: if ($target eq 'web' || $target eq 'webgrade') {
3852: $currentstring = $token->[2];
3853: } elsif ($target eq 'tex') {
3854: $currentstring='}';
3855: }
3856: return $currentstring;
3857: }
3858:
3859: #-- <server> tag
3860: sub start_server {
3861: my ($target,$token) = @_;
3862: my $currentstring = '';
3863: if ($target eq 'web' || $target eq 'webgrade') {
3864: $currentstring = $token->[4];
3865: }
3866: return $currentstring;
3867: }
3868:
3869: sub end_server {
3870: my ($target,$token) = @_;
3871: my $currentstring = '';
3872: if ($target eq 'web' || $target eq 'webgrade') {
3873: $currentstring = $token->[2];
3874: }
3875: return $currentstring;
3876: }
3877:
3878: #-- <spacer> tag (end tag forbidden)
3879: sub start_spacer {
3880: my ($target,$token) = @_;
3881: my $currentstring = &end_p(); # Close off any open <p> tag.
3882: if ($target eq 'web' || $target eq 'webgrade') {
3883: $currentstring .= $token->[4];
3884: }
3885: return $currentstring;
3886: }
3887:
3888: sub end_spacer {
3889: my ($target,$token) = @_;
3890: my $currentstring = '';
3891: if ($target eq 'web' || $target eq 'webgrade') {
3892: $currentstring = $token->[2];
3893: }
3894: return $currentstring;
3895: }
3896:
3897: #-- <span> tag (end tag required)
3898: sub start_span {
3899: my ($target,$token) = @_;
3900: my $currentstring = '';
3901: if ($target eq 'web' || $target eq 'webgrade') {
3902: $currentstring = $token->[4];
3903: }
3904: return $currentstring;
3905: }
3906:
3907: sub end_span {
3908: my ($target,$token) = @_;
3909: my $currentstring = '';
3910: if ($target eq 'web' || $target eq 'webgrade') {
3911: $currentstring = $token->[2];
3912: }
3913: return $currentstring;
3914: }
3915:
3916: #-- <tbody> tag (end tag optional)
3917: sub start_tbody {
3918: my ($target,$token) = @_;
3919: my $currentstring = '';
3920: if ($target eq 'web' || $target eq 'webgrade') {
3921: $currentstring = $token->[4];
3922: }
3923: return $currentstring;
3924: }
3925:
3926: sub end_tbody {
3927: my ($target,$token) = @_;
3928: my $currentstring = '';
3929: if ($target eq 'web' || $target eq 'webgrade') {
3930: $currentstring = $token->[2];
3931: }
3932: return $currentstring;
3933: }
3934:
3935: #-- <tfoot> tag (end tag optional)
3936: sub start_tfoot {
3937: my ($target,$token) = @_;
3938: my $currentstring = '';
3939: if ($target eq 'web' || $target eq 'webgrade') {
3940: $currentstring = $token->[4];
3941: }
3942: return $currentstring;
3943: }
3944:
3945: sub end_tfoot {
3946: my ($target,$token) = @_;
3947: my $currentstring = '';
3948: if ($target eq 'web' || $target eq 'webgrade') {
3949: $currentstring = $token->[2];
3950: }
3951: return $currentstring;
3952: }
3953:
3954: #-- <thead> tag (end tag optional)
3955: sub start_thead {
3956: my ($target,$token) = @_;
3957: my $currentstring = '';
3958: if ($target eq 'web' || $target eq 'webgrade') {
3959: $currentstring = $token->[4];
3960: }
3961: return $currentstring;
3962: }
3963:
3964: sub end_thead {
3965: my ($target,$token) = @_;
3966: my $currentstring = '';
3967: if ($target eq 'web' || $target eq 'webgrade') {
3968: $currentstring = $token->[2];
3969: }
3970: return $currentstring;
3971: }
3972:
3973: #-- <var> tag
3974: sub start_var {
3975: my ($target,$token) = @_;
3976: my $currentstring = '';
3977: if ($target eq 'web' || $target eq 'webgrade') {
3978: $currentstring = $token->[4];
3979: } elsif ($target eq 'tex') {
3980: $currentstring = '\textit{';
3981: }
3982: return $currentstring;
3983: }
3984:
3985: sub end_var {
3986: my ($target,$token) = @_;
3987: my $currentstring = '';
3988: if ($target eq 'web' || $target eq 'webgrade') {
3989: $currentstring = $token->[2];
3990: } elsif ($target eq 'tex') {
3991: $currentstring = '}';
3992: }
3993: return $currentstring;
3994: }
3995:
3996: #-- <wbr> tag (end tag forbidden)
3997: sub start_wbr {
3998: my ($target,$token) = @_;
3999: my $currentstring = '';
4000: if ($target eq 'web' || $target eq 'webgrade') {
4001: $currentstring = $token->[4];
4002: }
4003: return $currentstring;
4004: }
4005:
4006: sub end_wbr {
4007: my ($target,$token) = @_;
4008: my $currentstring = '';
4009: if ($target eq 'web' || $target eq 'webgrade') {
4010: $currentstring = $token->[2];
4011: }
4012: return $currentstring;
4013: }
4014:
4015: #-- <hideweboutput> tag
4016: sub start_hideweboutput {
4017: my ($target,$token) = @_;
4018: if ($target eq 'web' || $target eq 'webgrade') {
4019: &Apache::lonxml::startredirection();
4020: }
4021: return '';
4022: }
4023:
4024: sub end_hideweboutput {
4025: my ($target,$token) = @_;
4026: my $currentstring = '';
4027: if ($target eq 'web' || $target eq 'webgrade') {
4028: $currentstring = &Apache::lonxml::endredirection();
4029: }
4030: return '';
4031: }
4032:
4033:
4034: sub image_replication {
4035: my $src = shift;
4036: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4037: #replicates eps or ps
4038: my $epssrc = my $pssrc = $src;
4039: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4040: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4041: if (not -e $epssrc && not -e $pssrc) {
4042: my $result=&Apache::lonnet::repcopy($epssrc);
4043: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4044: }
4045: return '';
4046: }
4047: #
4048: # Get correct sizing parameter for an image given
4049: # it's initial ht. and wid. This allows sizing of
4050: # images that are generated on-the-fly (e.g. gnuplot)
4051: # as well as serving as a utility for image_size.
4052: #
4053: # Parameter:
4054: # height_param
4055: # width_param - Initial picture dimensions.
4056: # scaling - A scale factor.
4057: # parstack, - the current stack of tag attributes
4058: # from the xml parser
4059: # safeeval, - pointer to the safespace
4060: # depth, - from what level in the stack to look for attributes
4061: # (assumes -1 if unspecified)
4062: # cis - look for attrubutes case insensitively
4063: # (assumes false)
4064: #
4065: # Returns:
4066: # height, width - new dimensions.
4067: #
4068: sub resize_image {
4069: my ($height_param, $width_param, $scaling,
4070: $parstack, $safeeval, $depth, $cis) = @_;
4071:
4072: # First apply the scaling...
4073:
4074: $height_param = $height_param * $scaling;
4075: $width_param = $width_param * $scaling;
4076:
4077: #do we have any specified LaTeX size of the picture?
4078: my $toget='TeXwidth';
4079: if ($cis) {
4080: $toget=lc($toget);
4081: }
4082: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4083: $safeeval,$depth,$cis);
4084: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4085: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4086: $safeeval,$depth,$cis);
4087: #do we have any specified web size of the picture?
4088: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4089: $depth,1);
4090: if ($TeXwidth) {
4091: my $old_width_param=$width_param;
4092: if ($TeXwidth=~/(\d+)\s*\%/) {
4093: $width_param = $1*$env{'form.textwidth'}/100;
4094: } else {
4095: $width_param = $TeXwidth;
4096: }
4097: if ($TeXheight) {
4098: $height_param = $TeXheight;
4099: } elsif ($old_width_param) {
4100: $height_param=$TeXwidth/$old_width_param*$height_param;
4101: }
4102: } elsif ($TeXheight) {
4103: $height_param = $TeXheight;
4104: if ($height_param) {
4105: $width_param = $TeXheight/$height_param*$width_param;
4106: }
4107: } elsif ($width) {
4108: my $old_width_param=$width_param;
4109: $width_param = $width*$scaling;
4110: if ($old_width_param) {
4111: $height_param=$width_param/$old_width_param*$height_param;
4112: }
4113: }
4114: if ($width_param > $env{'form.textwidth'}) {
4115: my $old_width_param=$width_param;
4116: $width_param =0.95*$env{'form.textwidth'};
4117: if ($old_width_param) {
4118: $height_param=$width_param/$old_width_param*$height_param;
4119: }
4120: }
4121:
4122: return ($height_param, $width_param);
4123: }
4124:
4125: sub image_size {
4126: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4127:
4128: #size of image from gif/jpg/jpeg/png
4129: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4130: if (-e $ressrc) {
4131: $src = $ressrc;
4132: }
4133: my $image = Image::Magick->new;
4134: my $current_figure = $image->Read($src);
4135: my $width_param = $image->Get('width');
4136: my $height_param = $image->Get('height');
4137: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4138: undef($image);
4139:
4140: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4141: $scaling, $parstack, $safeeval,
4142: $depth, $cis);
4143:
4144: return ($height_param, $width_param);
4145: }
4146:
4147: sub image_width {
4148: my ($height, $width) = &image_size(@_);
4149: return $width;
4150: }
4151: # Not yet 100% sure this is correct in all circumstances..
4152: # due to my uncertainty about mods to image_size.
4153: #
4154: sub image_height {
4155: my ($height, $width) = &image_size(@_);
4156: return $height;
4157: }
4158:
4159: sub get_eps_image {
4160: my ($src)=@_;
4161: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4162:
4163: # In order to prevent the substitution of the alt text, we need to
4164: # be sure the orig_src file is on system now so:
4165:
4166: if (! -e $orig_src) {
4167: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4168: }
4169: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4170: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4171: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4172: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4173: &Apache::lonxml::debug("Filelocation gives: $src");
4174: if (! -e $src) {
4175: &Apache::lonxml::debug("$src does not exist");
4176: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4177: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4178: #if replication failed try to find ps file
4179: $src=~s/\.eps$/\.ps/;
4180: &Apache::lonxml::debug("Now looking for $src");
4181: #if no ps file try to replicate it.
4182: my $didrepcopy = &Apache::lonnet::repcopy($src);
4183: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4184: if ( (not -e $src) ||
4185: ($didrepcopy ne 'ok')) {
4186: &Apache::lonxml::debug("Failed to find or replicate $src");
4187:
4188: #if replication failed try to produce eps file dynamically
4189: $src=~s/\.ps$/\.eps/;
4190: my $temp_file;
4191: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4192: my $newsrc=$orig_src;
4193: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4194: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4195: print FILE "$newsrc\n";
4196: close FILE;
4197: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4198: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4199: if ($sext ne "") { # Put the ext. back in to uniquify.
4200: $src =~ s/\.eps$/$sext.eps/;
4201: }
4202: }
4203: }
4204: }
4205: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4206: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4207: return ($path.'/',$file);
4208: }
4209:
4210: sub eps_generation {
4211: my ($src,$file,$width_param) = @_;
4212: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4213: my $temp_file = Apache::File->new('>>'.$filename);
4214: print $temp_file "$src\n";
4215: my $newsrc = $src;
4216: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4217: $newsrc=~s/\/home\/httpd\/html\/res//;
4218: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4219: $newsrc=~s/\/\.\//\//;
4220: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4221: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4222: $newsrc=~s/\/home\/httpd\/lonUsers//;
4223: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4224: }
4225: if ($newsrc=~/\/userfiles\//) {
4226: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4227: } else {
4228: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4229: }
4230: }
4231:
4232: sub file_path {
4233: my $src=shift;
4234: my ($file,$path);
4235: if ($src =~ m!(.*)/([^/]*)$!) {
4236: $file = $2;
4237: $path = $1.'/';
4238: }
4239: return $file,$path;
4240: }
4241: # Converts a measurement in to mm from any of
4242: # the other valid LaTeX units of measure.
4243: # If the units of measure are missing from the
4244: # parameter, it is assumed to be in and returned
4245: # with mm units of measure
4246: sub recalc {
4247: my $argument = shift;
4248: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4249: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4250: my $value=$1;
4251: my $units=$2;
4252: if ($units eq 'cm') {
4253: $value*=10;
4254: } elsif ($units eq 'in') {
4255: $value*=25.4;
4256: } elsif ($units eq 'pc') {
4257: $value*=(25.4*12/72.27);
4258: } elsif ($units eq 'pt') {
4259: $value*=(25.4/72.27);
4260: }
4261: return $value.' mm';
4262: }
4263:
4264: sub LATEX_length {
4265: my $garbage=shift;
4266: $garbage=~s/^\s+$//;
4267: $garbage=~s/^\s+(\S.*)/$1/;#space before
4268: $garbage=~s/(.*\S)\s+$/$1/;#space after
4269: $garbage=~s/(\s)+/$1/;#only one space
4270: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4271: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4272: $garbage=~s/([^\\])\$/$1/g;#$
4273: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4274: $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;
4275: $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;
4276: $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;
4277: $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;
4278: $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;
4279: $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;
4280: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4281: #remove some other LaTeX command
4282: $garbage=~s|\\(\w+)\\|\\|g;
4283: $garbage=~s|\\(\w+)(\s*)|$2|g;
4284: $garbage=~s|\+|11|g;
4285: my $value=length($garbage);
4286: return $value;
4287: }
4288:
4289:
4290: # is_inside_of $tagstack $tag
4291: # This sub returns true if the current state of Xml processing
4292: # is inside of the tag.
4293: # Parameters:
4294: # tagstack - The tagstack from the parser.
4295: # tag - The tag (without the <>'s.).
4296: # Sample usage:
4297: # if (is_inside_of($tagstack "table")) {
4298: # # I'm in a table....
4299: # }
4300: sub is_inside_of {
4301: my ($tagstack, $tag) = @_;
4302: my @stack = @$tagstack;
4303: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4304: if ($stack[$i] eq $tag) {
4305: return 1;
4306: }
4307: }
4308: return 0;
4309: }
4310:
4311:
4312: 1;
4313: __END__
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