File:
[LON-CAPA] /
loncom /
xml /
londefdef.pm
Revision
1.318:
download - view:
text,
annotated -
select for diffs
Sat Feb 4 22:11:42 2006 UTC (18 years, 3 months ago) by
foxr
Branches:
MAIN
CVS tags:
HEAD
defect 4520: When printing a <pre></pre> section latex symbol substitution
must be turned off or else output can look funny e.g.
% -> \% < -> \ensuremath{<} etc.
----------------------------------------------------------------------
1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.318 2006/02/04 22:11:42 foxr Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: # use Data::Dumper;
52:
53: BEGIN {
54:
55: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
56:
57: }
58:
59: #
60: # Dumps all elements of the table structure.
61: # Need this 'cause evidently when given an array, Data::Dumper only seems
62: # to dump element 0.
63: #
64: #sub debug_dump_table {
65: # my $lastrow = $#Apache::londefdef::table;
66: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
67: # my $row;
68: # for ($row =0; $row <= $lastrow; $row++ ) {
69: # my $text = Dumper($Apache::londefdef::table[$row]);
70: # &Apache::lonnet::logthis("table [ $row ]".$text);
71: # }
72: #}
73: sub initialize_londefdef {
74: $Apache::londefdef::TD_redirection=0;
75: @Apache::londefdef::table = ();
76: $Apache::londefdef::select=0;
77: undef(@Apache::londefdef::description);
78: @Apache::londefdef::DD=(0);
79: @Apache::londefdef::DT=(0);
80: @Apache::londefdef::seenDT=(0);
81: $Apache::londefdef::list_index=0;
82: }
83:
84: #======================= TAG SUBROUTINES =====================
85: #-- <output>
86: sub start_output {
87: my ($target) = @_;
88: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
89: return '';
90: }
91: sub end_output {
92: my ($target) = @_;
93: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
94: return '';
95: }
96: #-- <m> tag
97: sub start_m {
98: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
99: my $currentstring = '';
100: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
101: if ($target eq 'web' || $target eq 'analyze') {
102: &Apache::lonxml::debug("M is starting with:$inside:");
103: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
104: if ($eval eq 'on') {
105: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
106: #&Apache::lonxml::debug("M is evaulated to:$inside:");
107: }
108: my $tex = $inside;
109: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
110: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
111: if ($Apache::lontexconvert::errorstring) {
112: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
113: $tex = &HTML::Entities::encode($tex,'<>&"');
114: my ($linenumber) =
115: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
116: if (defined($linenumber)) {
117: my @tex=split("\n",$tex);
118: $tex[$linenumber]='<b><font color="red">'.
119: $tex[$linenumber].'</font></b>';
120: $tex=join("\n",@tex);
121: }
122: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
123: $Apache::lontexconvert::errorstring='';
124: }
125: #&Apache::lonxml::debug("M is ends with:$currentstring:");
126: $Apache::lonxml::post_evaluate=0;
127: } elsif ($target eq 'tex') {
128: $currentstring = $inside;
129: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
130: if ($eval eq 'on') {
131: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
132: }
133: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
134: # detect simple math mode entry exits, and convert them
135: # to use \ensuremath
136: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
137: $currentstring=~s/^(\s*)\$/$1/;
138: $currentstring=~s/\$(\s*)$/$1/;
139: $currentstring='\ensuremath{'.$currentstring.'}';
140: }
141: $Apache::lonxml::post_evaluate=0;
142: }
143: return $currentstring;
144: }
145:
146: sub end_m {
147: my ($target,$token) = @_;
148: my $currentstring = '';
149: if ($target eq 'tex') {
150: $currentstring = "";
151: }
152: return $currentstring;
153: }
154:
155: sub start_tthoption {
156: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
157: my $result;
158: if ($target eq 'web') {
159: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
160: $style);
161: $inside=~s/^\s*//;
162: if ($env{'browser.mathml'}) {
163: &tth::ttmoptions($inside);
164: } else {
165: &tth::tthoptions($inside);
166: }
167: }
168: return $result;
169: }
170:
171: sub end_tthoption {
172: my ($target,$token) = @_;
173: my $result;
174: return $result;
175: }
176:
177: #-- <html> tag (end tag optional)
178: sub start_html {
179: my ($target,$token) = @_;
180: my $currentstring = '';
181: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
182: &Apache::lontexconvert::init_tth();
183: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
184: $currentstring = &Apache::lonxml::xmlbegin();
185: } elsif ($target eq 'tex') {
186: $currentstring .= '\documentclass[letterpaper,twoside]{article}';
187: if (($env{'form.latex_type'}=~'batchmode') ||
188: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
189: $currentstring .= '\newcommand{\keephidden}[1]{}'.
190: '\renewcommand{\deg}{$^{\circ}$}'.
191: '\usepackage{multirow}'.
192: '\usepackage{longtable}'.
193: '\usepackage{textcomp}'.
194: '\usepackage{makeidx}'.
195: '\usepackage[dvips]{graphicx}'.
196: '\usepackage{wrapfig}'.
197: '\usepackage{picins}'.
198: '\usepackage{epsfig}'.
199: '\usepackage{calc}'.
200: '\usepackage{amsmath}'.
201: '\usepackage{amssymb}'.
202: '\usepackage{amsfonts}'.
203: '\usepackage{amsthm}'.
204: '\usepackage{amscd}'.
205: '\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}}'.
206: '\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}}';
207: }
208: return $currentstring;
209: }
210:
211: sub end_html {
212: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
213: my $currentstring = '';
214: if ($target eq 'web') {
215: $currentstring = '</html>';
216: }
217: return $currentstring;
218: }
219:
220: #-- <head> tag (end tag optional)
221: sub start_head {
222: my ($target,$token) = @_;
223: my $currentstring = '';
224: if ($target eq 'web') {
225: $currentstring = $token->[4].&Apache::lonxml::fontsettings();
226: }
227: return $currentstring;
228: }
229:
230: sub end_head {
231: my ($target,$token) = @_;
232: my $currentstring = '';
233: if ($target eq 'web' && $env{'request.state'} eq 'published') {
234: $currentstring = &Apache::lonmenu::registerurl(undef,$target).
235: $token->[2];
236: }
237: return $currentstring;
238: }
239:
240: #-- <map> tag (end tag required)
241: sub start_map {
242: my ($target,$token) = @_;
243: my $currentstring = '';
244: if ($target eq 'web') {
245: $currentstring = $token->[4];
246: }
247: return $currentstring;
248: }
249:
250: sub end_map {
251: my ($target,$token) = @_;
252: my $currentstring = '';
253: if ($target eq 'web') {
254: $currentstring = $token->[2];
255: }
256: return $currentstring;
257: }
258:
259: #-- <select> tag (end tag required)
260: sub start_select {
261: my ($target,$token) = @_;
262: my $currentstring = '';
263: if ($target eq 'web') {
264: $currentstring = $token->[4];
265: } elsif ($target eq 'tex') {
266: $Apache::londefdef::select=0;
267: }
268: return $currentstring;
269: }
270:
271: sub end_select {
272: my ($target,$token) = @_;
273: my $currentstring = '';
274: if ($target eq 'web') {
275: $currentstring = $token->[2];
276: }
277: return $currentstring;
278: }
279:
280: #-- <option> tag (end tag optional)
281: sub start_option {
282: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
283: my $currentstring = '';
284: if ($target eq 'web') {
285: $currentstring = $token->[4];
286: } elsif ($target eq 'tex') {
287: $Apache::londefdef::select++;
288: if ($Apache::londefdef::select == 1) {
289: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
290: } else {
291: $currentstring='\keephidden{';
292: }
293: }
294: return $currentstring;
295: }
296:
297: sub end_option {
298: my ($target,$token) = @_;
299: my $currentstring = '';
300: if ($target eq 'web') {
301: $currentstring = $token->[2];
302: } elsif ($target eq 'tex') {
303: $currentstring='}';
304: }
305: return $currentstring;
306: }
307:
308: #-- <input> tag (end tag forbidden)
309: sub start_input {
310: my ($target,$token) = @_;
311: my $currentstring = '';
312: if ($target eq 'web') {
313: $currentstring = $token->[4];
314: }
315: return $currentstring;
316: }
317:
318: sub end_input {
319: my ($target,$token) = @_;
320: my $currentstring = '';
321: if ($target eq 'web') {
322: $currentstring = $token->[2];
323: }
324: return $currentstring;
325: }
326:
327: #-- <textarea> tag (end tag required)
328: sub start_textarea {
329: my ($target,$token) = @_;
330: my $currentstring = '';
331: if ($target eq 'web') {
332: $currentstring = $token->[4];
333: }
334: return $currentstring;
335: }
336:
337: sub end_textarea {
338: my ($target,$token) = @_;
339: my $currentstring = '';
340: if ($target eq 'web') {
341: $currentstring = $token->[2];
342: }
343: return $currentstring;
344: }
345:
346: #-- <form> tag (end tag required)
347: sub start_form {
348: my ($target,$token) = @_;
349: my $currentstring = '';
350: if ($target eq 'web') {
351: $currentstring = $token->[4];
352: }
353: return $currentstring;
354: }
355:
356: sub end_form {
357: my ($target,$token) = @_;
358: my $currentstring = '';
359: if ($target eq 'web') {
360: $currentstring = $token->[2];
361: }
362: return $currentstring;
363: }
364:
365: #-- <title> tag (end tag required)
366: sub start_title {
367: my ($target,$token) = @_;
368: my $currentstring = '';
369: if ($target eq 'web') {
370: $currentstring = $token->[4];
371: } elsif ($target eq 'tex') {
372: $currentstring .= '\keephidden{Title of the document: '
373: }
374: if ($target eq 'meta') {
375: $currentstring='<title>';
376: &start_output($target);
377: }
378: return $currentstring;
379: }
380:
381: sub end_title {
382: my ($target,$token) = @_;
383: my $currentstring = '';
384: if ($target eq 'web') {
385: $currentstring = $token->[2];
386: } elsif ($target eq 'tex') {
387: $currentstring .= '}';
388: }
389: if ($target eq 'meta') {
390: &end_output($target);
391: $currentstring='</title>';
392: }
393: return $currentstring;
394: }
395:
396: #-- <meta> tag (end tag forbidden)
397: sub start_meta {
398: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
399: my $currentstring = '';
400: if ($target eq 'web') {
401: my $args='';
402: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
403: if ($args eq '') {
404: &Apache::lonxml::get_all_text("/meta",$parser,$style);
405: } else {
406: $currentstring = $token->[4];
407: }
408: } elsif ($target eq 'meta') {
409: unless (&Apache::lonxml::get_param
410: ('http-equiv',$parstack,$safeeval,undef,1)) {
411: my $name=$token->[2]->{'name'};
412: $name=~tr/A-Z/a-z/;
413: $name=~s/\s/\_/gs;
414: $name=~s/\W//gs;
415: if ($name) {
416: $currentstring='<'.$name;
417: my $display=&Apache::lonxml::get_param
418: ('display',$parstack,$safeeval,undef,1);
419: if ($display) {
420: $display=~s/\"/\'/g;
421: $currentstring.=' display="'.$display.'"';
422: }
423: $currentstring.='>'.
424: &Apache::lonxml::get_param
425: ('content',$parstack,$safeeval,undef,1).
426: '</'.$name.'>';
427: }
428: my $display=&Apache::lonxml::get_param
429: ('display',$parstack,$safeeval,undef,1);
430: if ($display) {
431: $display=&HTML::Entities::encode($display,'<>&"');
432: $currentstring.='<'.$name.'.display>'.$display.
433: '</'.$name.'.display>';
434: }
435: }
436: } elsif ($target eq 'tex') {
437: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
438: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
439: if ((not defined $content) && (not defined $name)) {
440: &Apache::lonxml::startredirection();
441: }
442: }
443: return $currentstring;
444: }
445:
446: sub end_meta {
447: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
448: my $currentstring = '';
449: if ($target eq 'web') {
450: my $args='';
451: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
452: if ($args ne '') {
453: $currentstring = $token->[4];
454: }
455: } elsif ($target eq 'tex') {
456: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
457: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
458: if ((not defined $content) && (not defined $name)) {
459: &Apache::lonxml::endredirection();
460: }
461: }
462: return $currentstring;
463: }
464:
465: # accessrule
466: sub start_accessrule {
467: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
468: my $currentstring = '';
469: my $eff=&Apache::lonxml::get_param
470: ('effect',$parstack,$safeeval,undef,1);
471: my $realm=&Apache::lonxml::get_param
472: ('realm',$parstack,$safeeval,undef,1);
473: my $role=&Apache::lonxml::get_param
474: ('role',$parstack,$safeeval,undef,1);
475: $realm=~s/\s+//g;
476: $realm=~s/\//\_/g;
477: $realm=~s/^\_//;
478: $realm=~s/\W/\;/g;
479: $role=~s/\s+//g;
480: $role=~s/\//\_/g;
481: $role=~s/\W/\;/g;
482: if ($target eq 'web') {
483: my $args='';
484: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
485: if ($args eq '') {
486: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
487: } else {
488: $currentstring = $token->[4];
489: }
490: }
491: if ($target eq 'meta') {
492: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
493: }
494: return $currentstring;
495: }
496:
497: sub end_accessrule {
498: my ($target,$token,$tagstack,$parstack,$parser) = @_;
499: my $currentstring = '';
500: if ($target eq 'web') {
501: my $args='';
502: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
503: if ($args ne '') {
504: $currentstring = $token->[4];
505: }
506: }
507: return $currentstring;
508: }
509:
510: #-- <body> tag (end tag required)
511: sub start_body {
512: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
513: my $currentstring = '';
514:
515: if ($target eq 'web') {
516: if ($Apache::lonhomework::parsing_a_problem) {
517: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
518: return '';
519: }
520: if (!$Apache::lonxml::registered &&
521: $env{'request.state'} eq 'published') {
522: $currentstring.='<head>'.
523: &Apache::lonmenu::registerurl(undef,$target).'</head>';
524: }
525: # Accessibility
526: if ($env{'browser.imagesuppress'} eq 'on') {
527: delete($token->[2]->{'background'});
528: }
529: if ($env{'browser.fontenhance'} eq 'on') {
530: my $style='';
531: foreach my $key (keys(%{$token->[2]})) {
532: if ($key =~ /^style$/i) {
533: $style.=$token->[2]->{$key}.';';
534: delete($token->[2]->{$key});
535: }
536: }
537: $token->[2]->{'style'}=$style.'; font-size: x-large;';
538: }
539: if ($env{'browser.blackwhite'} eq 'on') {
540: delete($token->[2]->{'font'});
541: delete($token->[2]->{'link'});
542: delete($token->[2]->{'alink'});
543: delete($token->[2]->{'vlink'});
544: delete($token->[2]->{'bgcolor'});
545: delete($token->[2]->{'background'});
546: }
547: # Overload loads
548: my $onLoad='';
549: foreach my $key (keys(%{$token->[2]})) {
550: if ($key =~ /^onload$/i) {
551: $onLoad.=$token->[2]->{$key}.';';
552: delete($token->[2]->{$key});
553: }
554: }
555: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
556: my $onUnload='';
557: foreach my $key (keys(%{$token->[2]})) {
558: if ($key =~ /^onunload$/i) {
559: $onUnload.=$token->[2]->{$key}.';';
560: delete($token->[2]->{$key});
561: }
562: }
563: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
564: ';'.$onUnload;
565:
566: $currentstring .= '<'.$token->[1];
567: foreach (keys %{$token->[2]}) {
568: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
569: }
570: $currentstring.='>';
571: &Apache::lontexconvert::jsMath_reset();
572: if ($env{'environment.texengine'} eq 'jsMath') {
573: $currentstring.=&Apache::lontexconvert::jsMath_header();
574: }
575: if ($env{'request.state'} ne 'published') {
576: if ($env{'environment.remote'} eq 'off') {
577: $currentstring.=
578: &Apache::lonmenu::constspaceform().
579: &Apache::lonmenu::menubuttons(1,'web',1);
580: }
581: $currentstring.=(<<EDITBUTTON);
582: <form method="post">
583: <input type="submit" name="editmode" accesskey="e" value="Edit" />
584: </form>
585: EDITBUTTON
586: } else {
587: $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
588: }
589: $currentstring.=&Apache::lonxml::message_location();
590: } elsif ($target eq 'tex') {
591: $currentstring = '\begin{document}';
592: }
593: return $currentstring;
594: }
595:
596: sub end_body {
597: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
598: my $currentstring = &end_p(); # Close off unclosed <p>
599: if ($target eq 'web') {
600: $currentstring .= &Apache::lonxml::xmlend($target,$parser);
601: } elsif ($target eq 'tex') {
602: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
603: }
604: return $currentstring;
605: }
606:
607: # \begin{center} causes a new paragprah spacing that looks odd inside
608: # of a table cell
609: sub center_correction { return '\vspace*{-6 mm}'; }
610: #-- <center> tag (end tag required)
611: sub start_center {
612: my ($target,$token,$tagstack) = @_;
613: my $currentstring = &end_p(); # Close off any prior para.
614: if ($target eq 'web') {
615: $currentstring .= $token->[4];
616: } elsif ($target eq 'tex') {
617: if (&is_inside_of($tagstack, "table")) {
618: $currentstring .= ¢er_correction();
619: }
620: $currentstring .= '\begin{center}';
621: }
622: return $currentstring;
623: }
624:
625: sub end_center {
626: my ($target,$token,$tagstack) = @_;
627: my $currentstring = '';
628: if ($target eq 'web') {
629: $currentstring = $token->[2];
630: } elsif ($target eq 'tex') {
631: $currentstring = '\end{center}';
632: }
633: return $currentstring;
634: }
635:
636: #-- <b> tag (end tag required)
637: # NOTE: In TeX mode disables internal <p>
638: sub start_b {
639: my ($target,$token) = @_;
640: my $currentstring = '';
641: if ($target eq 'web') {
642: $currentstring = $token->[4];
643: } elsif ($target eq 'tex') {
644: &disable_para();
645: $currentstring .= '\textbf{';
646: }
647: return $currentstring;
648: }
649:
650: sub end_b {
651: my ($target,$token) = @_;
652: my $currentstring = '';
653: if ($target eq 'web') {
654: $currentstring = $token->[2];
655: } elsif ($target eq 'tex') {
656: &enable_para();
657: $currentstring = '}';
658: }
659: return $currentstring;
660: }
661:
662: #-- <strong> tag (end tag required)
663: # NOTE: in TeX mode disables internal <p>
664: sub start_strong {
665: my ($target,$token) = @_;
666: my $currentstring = '';
667: if ($target eq 'web') {
668: $currentstring = $token->[4];
669: } elsif ($target eq 'tex') {
670: &disable_para();
671: $currentstring = '\textbf{';
672: }
673: return $currentstring;
674: }
675:
676: sub end_strong {
677: my ($target,$token) = @_;
678: my $currentstring = '';
679: if ($target eq 'web') {
680: $currentstring = $token->[2];
681: } elsif ($target eq 'tex') {
682: &enable_para();
683: $currentstring = '}';
684: }
685: return $currentstring;
686: }
687:
688: #-- <h1> tag (end tag required)
689: sub start_h1 {
690: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
691: my $currentstring = &end_p(); # Close off any prior para.
692: if ($target eq 'web') {
693: $currentstring .= $token->[4];
694: } elsif ($target eq 'tex') {
695: my $pre;
696: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
697: if ($align eq 'center') {
698: $pre='\begin{center}';
699: } elsif ($align eq 'left') {
700: $pre='\rlap{';
701: } elsif ($align eq 'right') {
702: $pre=' \hfill \llap{';
703: }
704: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
705: if (not defined $TeXsize) {$TeXsize="large";}
706: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
707: } elsif ($target eq 'meta') {
708: $currentstring.='<subject>';
709: &start_output($target);
710: }
711: return $currentstring;
712: }
713:
714: sub end_h1 {
715: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
716: my $currentstring = '';
717: if ($target eq 'web') {
718: $currentstring .= $token->[2];
719: } elsif ($target eq 'tex') {
720: my $post='\vskip 0 mm ';
721: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
722: if ($align eq 'center') {
723: $post='\end{center}';
724: } elsif ($align eq 'left') {
725: $post='} \hfill'.'\vskip 0 mm ';
726: } elsif ($align eq 'right') {
727: $post='}'.'\vskip 0 mm ';
728: }
729: $currentstring .= '}}'.$post;
730: } elsif ($target eq 'meta') {
731: &end_output($target);
732: $currentstring='</subject>';
733: }
734: return $currentstring;
735: }
736:
737: #-- <h2> tag
738: sub start_h2 {
739: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
740: my $currentstring = &end_p(); # Close off any prior para.
741: if ($target eq 'web') {
742: $currentstring .= $token->[4];
743: } elsif ($target eq 'tex') {
744: my $pre;
745: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
746: if ($align eq 'center') {
747: $pre='\begin{center}';
748: } elsif ($align eq 'left') {
749: $pre='\rlap{';
750: } elsif ($align eq 'right') {
751: $pre=' \hfill \llap{';
752: }
753: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
754: if (not defined $TeXsize) {$TeXsize="large";}
755: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
756: }
757: return $currentstring;
758: }
759:
760: sub end_h2 {
761: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
762: my $currentstring = '';
763: if ($target eq 'web') {
764: $currentstring .= $token->[2];
765: } elsif ($target eq 'tex') {
766: my $post='\vskip 0 mm ';
767: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
768: if ($align eq 'center') {
769: $post='\end{center}';
770: } elsif ($align eq 'left') {
771: $post='} \hfill'.'\vskip 0 mm ';
772: } elsif ($align eq 'right') {
773: $post='}'.'\vskip 0 mm ';
774: }
775: $currentstring .= '}}'.$post;
776: }
777: return $currentstring;
778: }
779:
780: #-- <h3> tag
781: sub start_h3 {
782: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
783: my $currentstring = &end_p(); # Close off any prior para.
784: if ($target eq 'web') {
785: $currentstring .= $token->[4];
786: } elsif ($target eq 'tex') {
787: my $pre;
788: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
789: if ($align eq 'center') {
790: $pre='\begin{center}';
791: } elsif ($align eq 'left') {
792: $pre='\rlap{';
793: } elsif ($align eq 'right') {
794: $pre=' \hfill \llap{';
795: }
796: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
797: if (not defined $TeXsize) {$TeXsize="large";}
798: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
799: }
800: return $currentstring;
801: }
802:
803: sub end_h3 {
804: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
805: my $currentstring = '';
806: if ($target eq 'web') {
807: $currentstring .= $token->[2];
808: } elsif ($target eq 'tex') {
809: my $post='\vskip 0 mm ';
810: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
811: if ($align eq 'center') {
812: $post='\end{center}';
813: } elsif ($align eq 'left') {
814: $post='} \hfill'.'\vskip 0 mm ';
815: } elsif ($align eq 'right') {
816: $post='}'.'\vskip 0 mm ';
817: }
818: $currentstring .= '}}'.$post;
819: }
820: return $currentstring;
821: }
822:
823: #-- <h4> tag
824: sub start_h4 {
825: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
826: my $currentstring = &end_p(); # Close off any prior para.
827: if ($target eq 'web') {
828: $currentstring .= $token->[4];
829: } elsif ($target eq 'tex') {
830: my $pre;
831: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
832: if ($align eq 'center') {
833: $pre='\begin{center}';
834: } elsif ($align eq 'left') {
835: $pre='\rlap{';
836: } elsif ($align eq 'right') {
837: $pre=' \hfill \llap{';
838: }
839: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
840: if (not defined $TeXsize) {$TeXsize="large";}
841: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
842: }
843: return $currentstring;
844: }
845:
846: sub end_h4 {
847: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
848: my $currentstring = '';
849: if ($target eq 'web') {
850: $currentstring .= $token->[2];
851: } elsif ($target eq 'tex') {
852: my $post='\vskip 0 mm ';
853: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
854: if ($align eq 'center') {
855: $post='\end{center}';
856: } elsif ($align eq 'left') {
857: $post='} \hfill'.'\vskip 0 mm ';
858: } elsif ($align eq 'right') {
859: $post='}'.'\vskip 0 mm ';
860: }
861: $currentstring .= '}}'.$post;
862: }
863: return $currentstring;
864: }
865:
866: #-- <h5> tag
867: sub start_h5 {
868: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
869: my $currentstring = &end_p(); # Close off any prior paras.
870: if ($target eq 'web') {
871: $currentstring .= $token->[4];
872: } elsif ($target eq 'tex') {
873: my $pre;
874: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
875: if ($align eq 'center') {
876: $pre='\begin{center}';
877: } elsif ($align eq 'left') {
878: $pre='\rlap{';
879: } elsif ($align eq 'right') {
880: $pre=' \hfill \llap{';
881: }
882: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
883: if (not defined $TeXsize) {$TeXsize="large";}
884: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
885: }
886: return $currentstring;
887: }
888:
889: sub end_h5 {
890: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
891: my $currentstring = '';
892: if ($target eq 'web') {
893: $currentstring .= $token->[2];
894: } elsif ($target eq 'tex') {
895: my $post='\vskip 0 mm ';
896: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
897: if ($align eq 'center') {
898: $post='\end{center}';
899: } elsif ($align eq 'left') {
900: $post='} \hfill'.'\vskip 0 mm ';
901: } elsif ($align eq 'right') {
902: $post='}'.'\vskip 0 mm ';
903: }
904: $currentstring .= '}}'.$post;
905: }
906: return $currentstring;
907: }
908:
909: #-- <h6> tag
910: sub start_h6 {
911: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
912: my $currentstring = &end_p(); # Close off any prior paras.
913: if ($target eq 'web') {
914: $currentstring .= $token->[4];
915: } elsif ($target eq 'tex') {
916: my $pre;
917: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
918: if ($align eq 'center') {
919: $pre='\begin{center}';
920: } elsif ($align eq 'left') {
921: $pre='\rlap{';
922: } elsif ($align eq 'right') {
923: $pre=' \hfill \llap{';
924: }
925: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
926: if (not defined $TeXsize) {$TeXsize="large";}
927: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
928: }
929: return $currentstring;
930: }
931:
932: sub end_h6 {
933: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
934: my $currentstring = '';
935: if ($target eq 'web') {
936: $currentstring .= $token->[2];
937: } elsif ($target eq 'tex') {
938: my $post='\vskip 0 mm ';
939: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
940: if ($align eq 'center') {
941: $post='\end{center}';
942: } elsif ($align eq 'left') {
943: $post='} \hfill'.'\vskip 0 mm ';
944: } elsif ($align eq 'right') {
945: $post='}'.'\vskip 0 mm ';
946: }
947: $currentstring .= '}}'.$post;
948: }
949: return $currentstring;
950: }
951:
952: #--- <cite> tag (end tag required)
953: sub start_cite {
954: my ($target,$token) = @_;
955: my $currentstring = '';
956: if ($target eq 'web') {
957: $currentstring .= $token->[4];
958: } elsif ($target eq 'tex') {
959: $currentstring .= '\textit{';
960: }
961: return $currentstring;
962: }
963:
964: sub end_cite {
965: my ($target,$token) = @_;
966: my $currentstring = '';
967: if ($target eq 'web') {
968: $currentstring .= $token->[2];
969: } elsif ($target eq 'tex') {
970: $currentstring .= '}';
971: }
972: return $currentstring;
973: }
974:
975: #-- <i> tag (end tag required)
976: sub start_i {
977: my ($target,$token) = @_;
978: my $currentstring = '';
979: if ($target eq 'web') {
980: $currentstring .= $token->[4];
981: } elsif ($target eq 'tex') {
982: $currentstring .= '\textit{';
983: }
984: return $currentstring;
985: }
986:
987: sub end_i {
988: my ($target,$token) = @_;
989: my $currentstring = '';
990: if ($target eq 'web') {
991: $currentstring .= $token->[2];
992: } elsif ($target eq 'tex') {
993: $currentstring .= '}';
994: }
995: return $currentstring;
996: }
997:
998: #-- <address> tag (end tag required)
999: sub start_address {
1000: my ($target,$token) = @_;
1001: my $currentstring = '';
1002: if ($target eq 'web') {
1003: $currentstring .= $token->[4];
1004: } elsif ($target eq 'tex') {
1005: $currentstring .= '\textit{';
1006: }
1007: return $currentstring;
1008: }
1009:
1010: sub end_address {
1011: my ($target,$token) = @_;
1012: my $currentstring = '';
1013: if ($target eq 'web') {
1014: $currentstring .= $token->[2];
1015: } elsif ($target eq 'tex') {
1016: $currentstring .= '}';
1017: }
1018: return $currentstring;
1019: }
1020:
1021: #-- <dfn> tag (end tag required)
1022: sub start_dfn {
1023: my ($target,$token) = @_;
1024: my $currentstring = '';
1025: if ($target eq 'web') {
1026: $currentstring .= $token->[4];
1027: } elsif ($target eq 'tex') {
1028: $currentstring .= '\textit{';
1029: }
1030: return $currentstring;
1031: }
1032:
1033: sub end_dfn {
1034: my ($target,$token) = @_;
1035: my $currentstring = '';
1036: if ($target eq 'web') {
1037: $currentstring .= $token->[2];
1038: } elsif ($target eq 'tex') {
1039: $currentstring .= '}';
1040: }
1041: return $currentstring;
1042: }
1043:
1044: #-- <tt> tag (end tag required)
1045: sub start_tt {
1046: my ($target,$token) = @_;
1047: my $currentstring = '';
1048: if ($target eq 'web') {
1049: $currentstring .= $token->[4];
1050: } elsif ($target eq 'tex') {
1051: $currentstring .= '\texttt{';
1052: }
1053: return $currentstring;
1054: }
1055:
1056: sub end_tt {
1057: my ($target,$token) = @_;
1058: my $currentstring = '';
1059: if ($target eq 'web') {
1060: $currentstring .= $token->[2];
1061: } elsif ($target eq 'tex') {
1062: $currentstring .= '}';
1063: }
1064: return $currentstring;
1065: }
1066:
1067: #-- <kbd> tag (end tag required)
1068: sub start_kbd {
1069: my ($target,$token) = @_;
1070: my $currentstring = '';
1071: if ($target eq 'web') {
1072: $currentstring .= $token->[4];
1073: } elsif ($target eq 'tex') {
1074: $currentstring .= '\texttt{';
1075: }
1076: return $currentstring;
1077: }
1078:
1079: sub end_kbd {
1080: my ($target,$token) = @_;
1081: my $currentstring = '';
1082: if ($target eq 'web') {
1083: $currentstring .= $token->[2];
1084: } elsif ($target eq 'tex') {
1085: $currentstring .= '}';
1086: }
1087: return $currentstring;
1088: }
1089:
1090: #-- <code> tag (end tag required)
1091: sub start_code {
1092: my ($target,$token) = @_;
1093: my $currentstring = '';
1094: if ($target eq 'web') {
1095: $currentstring .= $token->[4];
1096: } elsif ($target eq 'tex') {
1097: $currentstring .= '\texttt{';
1098: }
1099: return $currentstring;
1100: }
1101:
1102: sub end_code {
1103: my ($target,$token) = @_;
1104: my $currentstring = '';
1105: if ($target eq 'web') {
1106: $currentstring .= $token->[2];
1107: } elsif ($target eq 'tex') {
1108: $currentstring .= '}';
1109: }
1110: return $currentstring;
1111: }
1112:
1113: #-- <em> tag (end tag required)
1114: sub start_em {
1115: my ($target,$token) = @_;
1116: my $currentstring = '';
1117: if ($target eq 'web') {
1118: $currentstring .= $token->[4];
1119: } elsif ($target eq 'tex') {
1120: $currentstring .= '\emph{';
1121: }
1122: return $currentstring;
1123: }
1124:
1125: sub end_em {
1126: my ($target,$token) = @_;
1127: my $currentstring = '';
1128: if ($target eq 'web') {
1129: $currentstring .= $token->[2];
1130: } elsif ($target eq 'tex') {
1131: $currentstring .= '}';
1132: }
1133: return $currentstring;
1134: }
1135:
1136: #-- <q> tag (end tag required)
1137: sub start_q {
1138: my ($target,$token) = @_;
1139: my $currentstring = '';
1140: if ($target eq 'web') {
1141: $currentstring .= $token->[4];
1142: } elsif ($target eq 'tex') {
1143: $currentstring .= '\emph{';
1144: }
1145: return $currentstring;
1146: }
1147:
1148: sub end_q {
1149: my ($target,$token) = @_;
1150: my $currentstring = '';
1151: if ($target eq 'web') {
1152: $currentstring .= $token->[2];
1153: } elsif ($target eq 'tex') {
1154: $currentstring .= '}';
1155: }
1156: return $currentstring;
1157: }
1158:
1159: # <p> is a bit strange since it does not require a closing </p>
1160: # However in latex, we must often output closing stuff to end
1161: # environments and {}'s etc. Therefore we do all the work
1162: # of figuring out the ending strings in the start tag processing,
1163: # and provide a mechanism to output the stop text external
1164: # to tag processing.
1165: #
1166: {
1167:
1168: my $closing_string = ''; # String required to close <p>
1169:
1170: # Some tags are <p> fragile meaning that <p> inside of them
1171: # does not work within TeX mode. This is managed via the
1172: # counter below:
1173: #
1174:
1175: my $para_disabled = 0;
1176:
1177: sub disable_para {
1178: $para_disabled++;
1179: }
1180: sub enable_para {
1181: $para_disabled--;
1182: }
1183:
1184:
1185: #-- <p> tag (end tag optional)
1186: #optional attribute - align="center|left|right"
1187: sub start_p {
1188: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1189: my $currentstring = '';
1190: if ($target eq 'web') {
1191: $currentstring .= &end_p(); # close off prior para if in progress.
1192: $currentstring .= $token->[4];
1193: if (! ($currentstring =~ /\//)) {
1194: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1195: }
1196: } elsif ($target eq 'tex' && !$para_disabled) {
1197:
1198: $currentstring .= &end_p(); # close off prior para if in progress.
1199: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1200: if ($align eq 'center') {
1201: $currentstring .='\begin{center}\par';
1202: $closing_string = '\end{center}';
1203: if (&is_inside_of($tagstack, "table")) {
1204: $currentstring = ¢er_correction().$currentstring;
1205: }
1206: } elsif ($align eq 'right') {
1207: $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1208: $closing_string= '}}';
1209: } elsif ($align eq 'left') {
1210: $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
1211: $closing_string = '}\hfill}';
1212: } else {
1213: $currentstring.='\par ';
1214: if (&is_inside_of($tagstack, 'table')) {
1215: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1216: } else {
1217: $closing_string = '\strut\\\\\strut ';
1218: }
1219: }
1220:
1221: }
1222: return $currentstring;
1223: }
1224: #
1225: # End paragraph processing just requires that we output the
1226: # closing string that was saved and blank it.
1227: sub end_p {
1228: # Note only 'tex' mode uses disable_para and enable_para
1229: # so we don't need to know the target in the check below:
1230:
1231: if (!$para_disabled) {
1232: my $current_string = $closing_string;
1233: $closing_string = ''; # Not in a para anymore.
1234: return $current_string;
1235: } else {
1236: return '';
1237: }
1238:
1239: }
1240: }
1241: #-- <br> tag (end tag forbidden)
1242: sub start_br {
1243: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1244: my $currentstring = '';
1245: if ($target eq 'web') {
1246: $currentstring .= $token->[4];
1247: } elsif ($target eq 'tex') {
1248: my @tempo=@$tagstack;
1249: my $signal=0;
1250: # Not going to factor this to is_inside_of since that would require
1251: # multiple stack traversals.
1252: #
1253: for (my $i=$#tempo;$i>=0;$i--) {
1254: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1255: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1256: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1257: $signal=1;
1258: last;
1259: }
1260: }
1261: if ($signal) {
1262: $currentstring .= ' \vskip 0 mm ';
1263: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1264: $currentstring .= '\strut \\\\ \strut ';
1265: }
1266: }
1267: return $currentstring;
1268: }
1269:
1270: sub end_br {
1271: my ($target,$token) = @_;
1272: my $currentstring = '';
1273: if ($target eq 'web') {
1274: $currentstring .= $token->[2];
1275: }
1276: return $currentstring;
1277: }
1278:
1279: #-- <big> tag (end tag required)
1280: sub start_big {
1281: my ($target,$token) = @_;
1282: my $currentstring = '';
1283: if ($target eq 'web') {
1284: $currentstring .= $token->[4];
1285: } elsif ($target eq 'tex') {
1286: $currentstring .= '{\large ';
1287: }
1288: return $currentstring;
1289: }
1290:
1291: sub end_big {
1292: my ($target,$token) = @_;
1293: my $currentstring = '';
1294: if ($target eq 'web') {
1295: $currentstring .= $token->[2];
1296: } elsif ($target eq 'tex') {
1297: $currentstring .= '}';
1298: }
1299: return $currentstring;
1300: }
1301:
1302: #-- <small> tag (end tag required)
1303: sub start_small {
1304: my ($target,$token) = @_;
1305: my $currentstring = '';
1306: if ($target eq 'web') {
1307: $currentstring .= $token->[4];
1308: } elsif ($target eq 'tex') {
1309: $currentstring .= '{\footnotesize ';
1310: }
1311: return $currentstring;
1312: }
1313:
1314: sub end_small {
1315: my ($target,$token) = @_;
1316: my $currentstring = '';
1317: if ($target eq 'web') {
1318: $currentstring .= $token->[2];
1319: } elsif ($target eq 'tex') {
1320: $currentstring .= '}';
1321: }
1322: return $currentstring;
1323: }
1324:
1325: #-- <basefont> tag (end tag forbidden)
1326: sub start_basefont {
1327: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1328: my $currentstring = '';
1329: if ($target eq 'web') {
1330: $currentstring = $token->[4];
1331: } elsif ($target eq 'tex') {
1332: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1333: if (defined $basesize) {
1334: $currentstring = '{\\'.$basesize.' ';
1335: }
1336: }
1337: return $currentstring;
1338: }
1339:
1340: sub end_basefont {
1341: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1342: my $currentstring = '';
1343: if ($target eq 'web') {
1344: $currentstring = $token->[4];
1345: } elsif ($target eq 'tex') {
1346: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1347: if (defined $basesize) {
1348: $currentstring = '}';
1349: }
1350: }
1351: return $currentstring;
1352: }
1353:
1354: #-- <font> tag (end tag required)
1355: sub start_font {
1356: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1357: my $currentstring = '';
1358: if ($target eq 'web') {
1359: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1360: if ($face!~/symbol/i) {
1361: if (($env{'browser.fontenhance'} eq 'on') ||
1362: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1363: }
1364: $currentstring = $token->[4];
1365: } elsif ($target eq 'tex') {
1366: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1367: if (defined $fontsize) {
1368: $currentstring = '{\\'.$fontsize.' ';
1369: }
1370: }
1371: return $currentstring;
1372: }
1373:
1374: sub end_font {
1375: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1376: my $currentstring = '';
1377: if ($target eq 'web') {
1378: $currentstring = $token->[2];
1379: } elsif ($target eq 'tex') {
1380: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1381: if (defined $fontsize) {
1382: $currentstring = '}';
1383: }
1384: }
1385: return $currentstring;
1386: }
1387:
1388: #-- <strike> tag (end tag required)
1389: sub start_strike {
1390: my ($target,$token) = @_;
1391: my $currentstring = '';
1392: if ($target eq 'web') {
1393: $currentstring .= $token->[4];
1394: } elsif ($target eq 'tex') {
1395: &Apache::lonxml::startredirection();
1396: }
1397: return $currentstring;
1398: }
1399:
1400: sub end_strike {
1401: my ($target,$token) = @_;
1402: my $currentstring = '';
1403: if ($target eq 'web') {
1404: $currentstring .= $token->[2];
1405: } elsif ($target eq 'tex') {
1406: $currentstring=&Apache::lonxml::endredirection();
1407: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1408: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1409: $currentstring=~s/(\S)\s*$/$1\}/;
1410: }
1411: return $currentstring;
1412: }
1413:
1414: #-- <s> tag (end tag required)
1415: sub start_s {
1416: my ($target,$token) = @_;
1417: my $currentstring = '';
1418: if ($target eq 'web') {
1419: $currentstring .= $token->[4];
1420: } elsif ($target eq 'tex') {
1421: &Apache::lonxml::startredirection();
1422: }
1423: return $currentstring;
1424: }
1425:
1426: sub end_s {
1427: my ($target,$token) = @_;
1428: my $currentstring = '';
1429: if ($target eq 'web') {
1430: $currentstring .= $token->[2];
1431: } elsif ($target eq 'tex') {
1432: $currentstring=&Apache::lonxml::endredirection();
1433: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1434: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1435: $currentstring=~s/(\S)\s*$/$1\}/;
1436: }
1437: return $currentstring;
1438: }
1439:
1440: #-- <sub> tag (end tag required)
1441: sub start_sub {
1442: my ($target,$token) = @_;
1443: my $currentstring = '';
1444: if ($target eq 'web') {
1445: $currentstring .= $token->[4];
1446: } elsif ($target eq 'tex') {
1447: $currentstring .= '\ensuremath{_{';
1448: }
1449: return $currentstring;
1450: }
1451:
1452: sub end_sub {
1453: my ($target,$token) = @_;
1454: my $currentstring = '';
1455: if ($target eq 'web') {
1456: $currentstring .= $token->[2];
1457: } elsif ($target eq 'tex') {
1458: $currentstring .= '}}';
1459: }
1460: return $currentstring;
1461: }
1462:
1463: #-- <sup> tag (end tag required)
1464: sub start_sup {
1465: my ($target,$token) = @_;
1466: my $currentstring = '';
1467: if ($target eq 'web') {
1468: $currentstring .= $token->[4];
1469: } elsif ($target eq 'tex') {
1470: $currentstring .= '\ensuremath{^{';
1471: }
1472: return $currentstring;
1473: }
1474:
1475: sub end_sup {
1476: my ($target,$token) = @_;
1477: my $currentstring = '';
1478: if ($target eq 'web') {
1479: $currentstring .= $token->[2];
1480: } elsif ($target eq 'tex') {
1481: $currentstring .= '}}';
1482: }
1483: return $currentstring;
1484: }
1485:
1486: #-- <hr> tag (end tag forbidden)
1487: sub start_hr {
1488: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1489: my $currentstring = &end_p(); # End enclosing para.
1490: if ($target eq 'web') {
1491: $currentstring .= $token->[4];
1492: } elsif ($target eq 'tex') {
1493: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1494: if (defined $LaTeXwidth) {
1495: if ($LaTeXwidth=~/^%/) {
1496: substr($LaTeXwidth,0,1)='';
1497: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1498: }
1499: } else {
1500: $LaTeXwidth ='0.9\textwidth';
1501: }
1502: my ($pre,$post);
1503: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1504: if (($align eq 'center') || (not defined $align)) {
1505: $pre=''; $post='';
1506: } elsif ($align eq 'left') {
1507: $pre='\rlap{'; $post='} \hfill';
1508: } elsif ($align eq 'right') {
1509: $pre=' \hfill \llap{'; $post='}';
1510: }
1511: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1512: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1513: }
1514: return $currentstring;
1515: }
1516:
1517: sub end_hr {
1518: my ($target,$token) = @_;
1519: my $currentstring = '';
1520: if ($target eq 'web') {
1521: $currentstring .= $token->[2];
1522: }
1523: return $currentstring;
1524: }
1525:
1526: #-- <div> tag (end tag required)
1527: {
1528:
1529: # Since div can be nested, the stack below is used
1530: # in 'tex' mode to store the ending strings
1531: # for the div stack.
1532:
1533: my @div_end_stack;
1534:
1535: sub start_div {
1536: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1537: my $currentstring = &end_p(); # Close enclosing para.
1538: if ($target eq 'web') {
1539: $currentstring .= $token->[4];
1540: }
1541: if ($target eq 'tex') {
1542: # 4 possible alignments: left, right, center, and -missing-.
1543:
1544: my $endstring = '';
1545:
1546: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1547: $safeeval, undef, 1));
1548: if ($align eq 'center') {
1549: $currentstring .= '\begin{center}';
1550: $endstring = '\end{center}';
1551: if (&is_inside_of($tagstack, "table")) {
1552: $currentstring = ¢er_correction().$currentstring;
1553: }
1554: }
1555: elsif ($align eq 'right') {
1556: $currentstring .= '\begin{flushright}';
1557: $endstring .= '\end{flushright}';
1558: } elsif ($align eq 'left') {
1559: $currentstring .= '\begin{flushleft}';
1560: $endstring = '\end{flushleft}';
1561: } else {
1562:
1563: }
1564: $currentstring .= "\n"; # For human readability.
1565: $endstring = "\n$endstring\n"; # For human readability
1566: push(@div_end_stack, $endstring);
1567: }
1568: return $currentstring;
1569: }
1570:
1571: sub end_div {
1572: my ($target,$token) = @_;
1573: my $currentstring = '';
1574: if ($target eq 'web') {
1575: $currentstring .= $token->[2];
1576: }
1577: if ($target eq 'tex') {
1578: my $endstring = pop @div_end_stack;
1579: $currentstring .= $endstring;
1580: }
1581: return $currentstring;
1582: }
1583: }
1584:
1585: #-- <a> tag (end tag required)
1586: sub start_a {
1587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1588: my $currentstring = '';
1589: if ($target eq 'web') {
1590: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1591: undef,1);
1592: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1593: } elsif ($target eq 'tex') {
1594: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1595: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1596: if ($a=~/\S/) {
1597: $a=~s/([^\\])%/$1\\\%/g;
1598: $currentstring .= '\ref{URI: '.$a.'}';
1599: } elsif ($b=~/\S/) {
1600: $currentstring .= '\ref{Anchor: '.$b.'}';
1601: } else {
1602: $currentstring.='';
1603: }
1604: }
1605: return $currentstring;
1606: }
1607:
1608: sub end_a {
1609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1610: my $currentstring = '';
1611: if ($target eq 'web') {
1612: $currentstring .= $token->[2];
1613: }
1614: return $currentstring;
1615: }
1616:
1617: #-- <li> tag (end tag optional)
1618: sub start_li {
1619: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1620: my $currentstring = '';
1621: if ($target eq 'web') {
1622: $currentstring = $token->[4];
1623: } elsif ($target eq 'tex') {
1624: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1625: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1626: #FIXME need to support types i and I
1627: if ($type=~/disc/) {
1628: $currentstring .= ' \item[$\bullet$] ';
1629: } elsif ($type=~/circle/) {
1630: $currentstring .= ' \item[$\circ$] ';
1631: } elsif ($type=~/square/) {
1632: $currentstring .= ' \item[$\diamond$] ';
1633: } elsif ($type eq '1') {
1634: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1635: } elsif ($type eq 'A') {
1636: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1637: } elsif ($type eq 'a') {
1638: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1639: } elsif ($value ne '') {
1640: $currentstring .= ' \item['.$value.'] ';
1641: } else {
1642: $currentstring .= ' \item ';
1643: }
1644: $Apache::londefdef::list_index++;
1645: }
1646: return $currentstring;
1647: }
1648:
1649: sub end_li {
1650: my ($target,$token) = @_;
1651: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1652: if ($target eq 'web') {
1653: $currentstring .= $token->[2];
1654: }
1655: return $currentstring;
1656: }
1657:
1658: #-- <u> tag (end tag required)
1659: sub start_u {
1660: my ($target,$token) = @_;
1661: my $currentstring = '';
1662: if ($target eq 'web') {
1663: $currentstring .= $token->[4];
1664: } elsif ($target eq 'tex') {
1665: &Apache::lonxml::startredirection();
1666: }
1667: return $currentstring;
1668: }
1669:
1670: sub end_u {
1671: my ($target,$token) = @_;
1672: my $currentstring = '';
1673: if ($target eq 'web') {
1674: $currentstring .= $token->[2];
1675: } elsif ($target eq 'tex') {
1676: $currentstring=&Apache::lonxml::endredirection();
1677: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1678: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1679: $currentstring=~s/(\S)\s*$/$1\}/;
1680: }
1681: return $currentstring;
1682: }
1683:
1684: #-- <ul> tag (end tag required)
1685: sub start_ul {
1686: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1687: my $currentstring = &end_p(); # Close off enclosing list.
1688: if ($target eq 'web') {
1689: $currentstring .= $token->[4];
1690: } elsif ($target eq 'tex') {
1691: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1692: $Apache::londefdef::list_index=0;
1693: if ($TeXtype eq 'disc') {
1694: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1695: '\renewcommand{\labelitemii}{$\bullet$}'.
1696: '\renewcommand{\labelitemiii}{$\bullet$}'.
1697: '\renewcommand{\labelitemiv}{$\bullet$}';
1698: } elsif ($TeXtype eq 'circle') {
1699: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1700: '\renewcommand{\labelitemii}{$\circ$}'.
1701: '\renewcommand{\labelitemiii}{$\circ$}'.
1702: '\renewcommand{\labelitemiv}{$\circ$}';
1703: } elsif ($TeXtype eq 'square') {
1704: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1705: '\renewcommand{\labelitemii}{$\diamond$}'.
1706: '\renewcommand{\labelitemiii}{$\diamond$}'.
1707: '\renewcommand{\labelitemiv}{$\diamond$}';
1708: }
1709: $currentstring .= '\strut \begin{itemize}';
1710: }
1711: return $currentstring;
1712: }
1713:
1714: sub end_ul {
1715: my ($target,$token) = @_;
1716: my $currentstring = '';
1717: if ($target eq 'web') {
1718: $currentstring = $token->[2];
1719: } elsif ($target eq 'tex') {
1720: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1721: '\renewcommand{\labelitemii}{$\bullet$}'.
1722: '\renewcommand{\labelitemiii}{$\bullet$}'.
1723: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1724: }
1725: return $currentstring;
1726: }
1727:
1728: #-- <menu> tag (end tag required)
1729: sub start_menu {
1730: my ($target,$token) = @_;
1731: my $currentstring = '';
1732: if ($target eq 'web') {
1733: $currentstring = $token->[4];
1734: } elsif ($target eq 'tex') {
1735: $currentstring = " \\begin{itemize} ";
1736: }
1737: return $currentstring;
1738: }
1739:
1740: sub end_menu {
1741: my ($target,$token) = @_;
1742: my $currentstring = '';
1743: if ($target eq 'web') {
1744: $currentstring = $token->[2];
1745: } elsif ($target eq 'tex') {
1746: $currentstring = " \\end{itemize}";
1747: }
1748: return $currentstring;
1749: }
1750:
1751: #-- <dir> tag (end tag required)
1752: sub start_dir {
1753: my ($target,$token) = @_;
1754: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1755: if ($target eq 'web') {
1756: $currentstring .= $token->[4];
1757: } elsif ($target eq 'tex') {
1758: $currentstring .= " \\begin{itemize} ";
1759: }
1760: return $currentstring;
1761: }
1762:
1763: sub end_dir {
1764: my ($target,$token) = @_;
1765: my $currentstring = '';
1766: if ($target eq 'web') {
1767: $currentstring = $token->[2];
1768: } elsif ($target eq 'tex') {
1769: $currentstring = " \\end{itemize}";
1770: }
1771: return $currentstring;
1772: }
1773:
1774: #-- <ol> tag (end tag required)
1775: sub start_ol {
1776: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1777: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1778: if ($target eq 'web') {
1779: $currentstring .= $token->[4];
1780: } elsif ($target eq 'tex') {
1781: $Apache::londefdef::list_index=0;
1782: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1783: if ($type eq '1') {
1784: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1785: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1786: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1787: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1788: } elsif ($type eq 'A') {
1789: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1790: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1791: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1792: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1793: } elsif ($type eq 'a') {
1794: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1795: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1796: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1797: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1798: } elsif ($type eq 'i') {
1799: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1800: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1801: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1802: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1803: } elsif ($type eq 'I') {
1804: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1805: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1806: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1807: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1808: }
1809: $currentstring .= '\strut \begin{enumerate}';
1810: }
1811: return $currentstring;
1812: }
1813:
1814: sub end_ol {
1815: my ($target,$token) = @_;
1816: my $currentstring = '';
1817: if ($target eq 'web') {
1818: $currentstring = $token->[2];
1819: } elsif ($target eq 'tex') {
1820: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1821: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1822: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1823: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1824: }
1825: return $currentstring;
1826: }
1827:
1828: #-- <dl> tag (end tag required)
1829: sub start_dl {
1830: my ($target,$token) = @_;
1831: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1832: if ($target eq 'web') {
1833: $currentstring .= $token->[4];
1834: } elsif ($target eq 'tex') {
1835: $currentstring .= '\begin{description}';
1836: $Apache::londefdef::DL++;
1837: push(@Apache::londefdef::description,[]);
1838: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1839: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1840: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1841: }
1842: return $currentstring;
1843: }
1844:
1845: sub end_dl {
1846: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1847: my $currentstring = '';
1848: if ($target eq 'web') {
1849: $currentstring = $token->[2];
1850: } elsif ($target eq 'tex') {
1851: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1852: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1853: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1854: $currentstring.=' '.$element.' ';
1855: }
1856: pop(@Apache::londefdef::description);
1857: $currentstring.='\end{description}';
1858: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1859: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1860: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1861: $Apache::londefdef::DL--;
1862: }
1863: return $currentstring;
1864: }
1865:
1866: #-- <dt> tag (end tag optional)
1867: sub start_dt {
1868: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1869: my $currentstring='';
1870: if ($target eq 'web') {
1871: $currentstring = $token->[4];
1872: } elsif ($target eq 'tex') {
1873: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1874: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1875: &Apache::lonxml::startredirection();
1876: $Apache::londefdef::DT[-1]++;
1877: $Apache::londefdef::seenDT[-1]=1;
1878: }
1879: return $currentstring;
1880: }
1881:
1882: sub end_dt {
1883: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1884: my $currentstring = '';
1885: if ($target eq 'web') {
1886: $currentstring = $token->[2];
1887: } elsif ($target eq 'tex') {
1888: if ($Apache::londefdef::DT[-1]) {
1889: my $data=&item_cleanup();
1890: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1891: $Apache::londefdef::DT[-1]--;
1892: }
1893: }
1894: return $currentstring;
1895: }
1896:
1897: sub item_cleanup {
1898: my $item=&Apache::lonxml::endredirection();
1899: $item=~s/\\begin{center}//g;
1900: $item=~s/\\end{center}//g;
1901: return $item;
1902: }
1903:
1904: #-- <dd> tag (end tag optional)
1905: sub start_dd {
1906: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1907: my $currentstring = '';
1908: if ($target eq 'web') {
1909: $currentstring = $token->[4];
1910: } elsif ($target eq 'tex') {
1911: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1912: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1913: if (!$Apache::londefdef::seenDT[-1]) {
1914: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1915: }
1916: push(@{$Apache::londefdef::description[-1]},'');
1917: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1918: $Apache::londefdef::DD[-1]++;
1919: &Apache::lonxml::startredirection();
1920: }
1921: return $currentstring;
1922: }
1923:
1924: sub end_dd {
1925: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1926: my $currentstring = '';
1927: if ($target eq 'web') {
1928: $currentstring = $token->[2];
1929: } elsif ($target eq 'tex') {
1930: $Apache::londefdef::description[-1]->[-1].=
1931: &Apache::lonxml::endredirection().' \vskip 0mm ';
1932: $Apache::londefdef::DD[-1]--;
1933: }
1934: return $currentstring;
1935: }
1936:
1937: #-- <table> tag (end tag required)
1938: # <table> also ends any prior <p> that is not closed.
1939: # but, unless I allow <p>'s to nest, that's the
1940: # only way I could think of to allow <p> in
1941: # <tr> <th> bodies
1942: #
1943: #list of supported attributes: border,width,TeXwidth
1944: sub start_table {
1945: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1946: my $textwidth = '';
1947: my $currentstring = &end_p();
1948: if ($target eq 'web') {
1949: $currentstring .= $token->[4];
1950: } elsif ($target eq 'tex') {
1951: my $aa = {};
1952: push @Apache::londefdef::table, $aa;
1953: $Apache::londefdef::table[-1]{'row_number'} = -1;
1954: #maximum table's width (default coincides with text line length)
1955: if ($#Apache::londefdef::table==0) {
1956: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1957: $textwidth=~/(\d+\.?\d*)/;
1958: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1959: } else {
1960: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1961: #the maximum width of nested table is determined by LATeX width of parent cell
1962: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1963: } else {
1964: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1965: $textwidth=$Apache::londefdef::table[-2]{'width'};
1966: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1967: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1968: }
1969: }
1970: }
1971:
1972: # width either comes forced from the TeXwidth or the width parameters.
1973: # in either case it can be a percentage or absolute width.
1974: # in the width case we ignore absolute width
1975: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1976: if (!defined($TeXwidth)) {
1977: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1978: $safeeval,undef,1);
1979: if ($htmlwidth =~ /%/) {
1980: $TeXwidth = $htmlwidth;
1981: } else {
1982: $TeXwidth = $textwidth;
1983: }
1984: } else {
1985: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1986: }
1987: if ($TeXwidth=~/%/) {
1988: $Apache::londefdef::table[-1]{'percent'}=1;
1989: $TeXwidth=~/(\d+)/;
1990: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1991: } else {
1992: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1993: }
1994: # In the end, however the table width cannot be wider than $textwidth...
1995:
1996: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1997: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1998: }
1999:
2000: #table's border
2001: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2002: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2003: unless (defined $border) { $border = 0; }
2004: if ($border) {
2005: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
2006: $Apache::londefdef::table[-1]{'vinc'} = '&';
2007: $Apache::londefdef::table[-1]{'vvinc'} = '|';
2008: } else {
2009: $Apache::londefdef::table[-1]{'hinc'} = '';
2010: $Apache::londefdef::table[-1]{'vinc'} = '&';
2011: $Apache::londefdef::table[-1]{'vvinc'} = '';
2012: }
2013: if ($#Apache::londefdef::table==0) {
2014: # Note that \newline seems to destroy the alignment envs.
2015: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2016: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2017: }
2018: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2019: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2020: $Apache::londefdef::table[-1]{'objectlen'}=[];
2021: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2022: $Apache::londefdef::table[-1]{'maxlen'}=[];
2023: $Apache::londefdef::table[-1]{'minlen'}=[];
2024: $Apache::londefdef::table[-1]{'content'}=[];
2025: $Apache::londefdef::table[-1]{'align'}=[];
2026: $currentstring.='\keephidden{NEW TABLE ENTRY}';
2027:
2028:
2029: }
2030: return $currentstring;
2031: }
2032:
2033: sub end_table {
2034: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2035: my $currentstring = '';
2036: if ($target eq 'web') {
2037: $currentstring = $token->[2];
2038: } elsif ($target eq 'tex') {
2039: my $inmemory = '';
2040: my $output = '';
2041: my $WARNING='';
2042: # &debug_dump_table($Apache::londefdef::table[-1]);
2043: #width of columns from TeXwidth attributes
2044:
2045: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2046: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2047: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2048: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2049: }
2050: }
2051: }
2052: #free space and number of empty columns
2053: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2054: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2055: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2056: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2057: $empty_columns++;
2058: } else {
2059: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2060: }
2061: }
2062: #boundaries for contents columns
2063: my @min_len=();#columns can not be narrower
2064: my @max_len=();#maximum length of column
2065: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2066: my ($localmin,$localmax)=(0,0);
2067: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2068: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2069: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2070: }
2071: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2072: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2073: }
2074: }
2075: push @min_len, $localmin;
2076: push @max_len, $localmax;
2077: }
2078: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2079: my $localmin=0,;
2080: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2081: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2082: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2083: }
2084: }
2085: if ($max_len[$jn]<$localmin) {
2086: $max_len[$jn]=$localmin;
2087: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2088: }#object size is bigger
2089: if ($min_len[$jn]<$localmin) {
2090: $min_len[$jn]=$localmin;
2091: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2092: }#object size is bigger
2093: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2094: $min_len[$jn]=0;
2095: $max_len[$jn]=0;
2096: }
2097: }
2098: #final adjustment of column width
2099: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2100: my @adjust=();
2101: #step 1. adjustment by maximum value
2102: my $space_neeeded=0;
2103: for (my $jn=0;$jn<=$#max_len;$jn++) {
2104: $space_neeeded=$space_neeeded+$max_len[$jn];
2105: }
2106: if ($space_neeeded<=$available_space) {
2107: for (my $jn=0;$jn<=$#max_len;$jn++) {
2108: if ($fwidth[$jn]==0) {
2109: $fwidth[$jn]=$max_len[$jn];
2110: }
2111: }
2112: } else {
2113: #step 2. adjustment by minimum value (estimation)
2114: $space_neeeded=0;
2115: for (my $jn=0;$jn<=$#min_len;$jn++) {
2116: $space_neeeded+=$min_len[$jn];
2117: }
2118: if ($space_neeeded>$available_space) {
2119: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2120: for (my $jn=0;$jn<=$#max_len;$jn++) {
2121: if ($fwidth[$jn]==0) {
2122: $fwidth[$jn]=$min_len[$jn];
2123: }
2124: }
2125: #check if we have objects which can be scaled
2126: my $how_many_to_scale=0;
2127: my @to_scale=();
2128: for (my $jn=0;$jn<=$#max_len;$jn++) {
2129: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2130: $how_many_to_scale++;
2131: push @to_scale, $jn;
2132: }
2133: }
2134: if ($how_many_to_scale>0) {
2135: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2136: foreach my $jn (@to_scale) {
2137: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2138: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2139: if ($1 ne '') {
2140: my $current_length=&recalc($1);
2141: $current_length=~/(\d+\.?\d*)/;
2142: $current_length=$current_length-$space_to_adjust;
2143: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2144: }
2145: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2146: if ($1 ne '') {
2147: my $current_length=$1;
2148: $current_length=$current_length-$space_to_adjust;
2149: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2150: }
2151: }
2152: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2153: }
2154: }
2155: } else {
2156: #step 3. adjustment over minimal + corrections
2157: my $enlarge_coef=$available_space/$space_neeeded;
2158: my $acsessive=0;
2159: for (my $jn=0;$jn<=$#min_len;$jn++) {
2160: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2161: if ($adjust[$jn]>$max_len[$jn]) {
2162: $fwidth[$jn]=$max_len[$jn];
2163: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2164: $adjust[$jn]=0;
2165: }
2166: }
2167: if ($acsessive>0) {
2168: #we have an excess of space and can redistribute it
2169: my $notempty_columns=0;
2170: for (my $jn=0;$jn<=$#min_len;$jn++) {
2171: if ($adjust[$jn]!=0) {
2172: $notempty_columns++;
2173: }
2174: }
2175: my $per_column=$acsessive/$notempty_columns;
2176: for (my $jn=0;$jn<=$#min_len;$jn++) {
2177: if ($adjust[$jn]!=0) {
2178: $adjust[$jn]+=$per_column;
2179: $fwidth[$jn]=$adjust[$jn];
2180: }
2181: }
2182: } else {
2183: for (my $jn=0;$jn<=$#min_len;$jn++) {
2184: $fwidth[$jn]=$adjust[$jn];
2185: }
2186: }
2187: }
2188: }
2189: #use all available width if it is defined in % or as TeXwidth
2190: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2191: my $current=0;
2192: for (my $i=0;$i<=$#fwidth;$i++) {
2193: $current+=$fwidth[$i];
2194: }
2195: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2196: for (my $i=0;$i<=$#fwidth;$i++) {
2197: $fwidth[$i]*=$coef;
2198: }
2199: }
2200: #removing of empty columns if allowed
2201: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2202: if ($permission eq 'yes') {
2203: my @cleaned_table=();
2204: my @cleaned_header=();
2205: my $colind=0;
2206: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2207: if ($fwidth[$jn]!=0) {
2208: #we need to copy column
2209: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2210: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2211: $cleaned_header[$colind]=$fwidth[$jn];
2212: }
2213: $colind++;
2214: }
2215: }
2216: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2217: @fwidth=@cleaned_header;
2218: }
2219: #construct header of the table
2220: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2221: for (my $in=0;$in<=$#fwidth;$in++) {
2222: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2223: }
2224: $header_of_table .= '}';
2225: #fill the table
2226: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2227: my $have_rowspan = 0;
2228: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2229: #
2230: # Do the appropriate magic if this has a colspan
2231: #
2232: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2233: if ($colspan > 1) {
2234: $output .= '\multicolumn{'.
2235: $colspan
2236: .'}{|l|}{';
2237: }
2238: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2239:
2240: # Start a rowspan if necessary:
2241:
2242: if ($rowspan > 1) {
2243: $have_rowspan++;
2244: $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
2245: }
2246: if (($rowspan eq '^') || ($rowspan eq '_')) {
2247: $have_rowspan++;
2248: }
2249:
2250: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2251: $output.=¢er_correction().'\begin{center}';
2252: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2253: $output.=' \hfill \llap{'
2254: }
2255: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2256: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2257: $output.='\end{center}';
2258: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2259: $output.='} ';
2260: }
2261: # Close off any open multirow:
2262:
2263: if ($rowspan > 1) {
2264: $output .= '}';
2265: }
2266: # Close off the colspan...
2267: #
2268: if ($colspan > 1) {
2269: $output .= '}';
2270: $jn += $colspan-1; # Adjust for number of rows really left.
2271: }
2272: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2273: }
2274: # If have_rowspan > 0, and borders are on, then
2275: # we need to do more than put an \hline at the bottom of row.
2276: # we need to do the appropriate \cline to ensure that
2277: # the spanned rows don't have \hlines through them.
2278:
2279: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2280: $output .= ' \\\\ ';
2281: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2282: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2283: if (($rowspan <= 1) || ($rowspan eq '_')) {
2284: my $column = $jn+1;
2285: $output .= '\cline{'.$column.'-'.$column.'} ';
2286: }
2287: }
2288:
2289: } else {
2290: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2291: }
2292: }
2293: # Note that \newline destroys alignment env's produced by e.g. <div>
2294: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2295: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2296: if ($#Apache::londefdef::table > 0) {
2297: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2298: # Figure out max/and min width by summing us and then
2299: # apply that to the current column of the table we nest in
2300: # if it's larger than the current width or the current width
2301: # is undefined.
2302: #
2303: my $min_nested_width = 0;
2304: my $max_nested_width = 0;
2305: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2306: $min_nested_width += $min_len[$col];
2307: $max_nested_width += $max_len[$col];
2308:
2309: }
2310: # Fudge in an extra 5 mm for borders etc:
2311:
2312: $min_nested_width += 5;
2313: $max_nested_width += 5;
2314:
2315: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2316: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2317: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2318: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2319: }
2320: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2321: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2322: }
2323:
2324: pop @Apache::londefdef::table;
2325: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2326: } else {
2327: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2328: pop @Apache::londefdef::table;
2329: undef @Apache::londefdef::table;
2330: }
2331: }
2332: return $currentstring;
2333: }
2334:
2335: #-- <tr> tag (end tag optional)
2336: sub start_tr {
2337: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2338: my $currentstring = '';
2339: if ($target eq 'web') {
2340: $currentstring = $token->[4];
2341: } elsif ($target eq 'tex') {
2342: $Apache::londefdef::table[-1]{'row_number'}++;
2343: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2344: if ($alignchar ne '') {
2345: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2346: } else {
2347: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2348: }
2349: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2350: #
2351: # Need to save the number of table columns to preserve the max # columns.
2352: #
2353: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2354: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2355: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2356: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2357: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2358: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2359: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2360: }
2361: return $currentstring;
2362: }
2363:
2364: sub end_tr {
2365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2366: my $currentstring = &end_p(); # Close any pending <p> in the row.
2367: if ($target eq 'web') {
2368: $currentstring .= $token->[2];
2369: } elsif ($target eq 'tex') {
2370: if ($Apache::londefdef::TD_redirection) {
2371: &end_td_tex($parstack,$parser,$safeeval);
2372: }
2373: # Counter columns must be the maximum number of columns seen
2374: # in the table so far so:
2375: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2376: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2377: }
2378:
2379:
2380:
2381: }
2382: return $currentstring;
2383: }
2384:
2385: #-- <td> tag (end tag optional)
2386: sub start_td {
2387: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2388: my $currentstring = '';
2389: if ($target eq 'web') {
2390: $currentstring = $token->[4];
2391: } elsif ($target eq 'tex') {
2392: $Apache::londefdef::TD_redirection = 1;
2393: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2394: }
2395: return $currentstring;
2396: }
2397:
2398: sub tag_check {
2399: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2400: my @ar=@$parstack;
2401: for (my $i=$#ar-1;$i>=0;$i--) {
2402: if (lc($$tagstack[$i]) eq $good_tag) {
2403: &start_td_tex($parstack,$parser,$safeeval);
2404: last;
2405: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2406: splice @ar, $i+1;
2407: &end_td_tex(\@ar,$parser,$safeeval);
2408: &start_td_tex($parstack,$parser,$safeeval);
2409: last;
2410: }
2411: }
2412: return '';
2413: }
2414:
2415: sub start_td_tex {
2416: my ($parstack,$parser,$safeeval) = @_;
2417: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2418: if ($alignchar eq '') {
2419: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2420: }
2421: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2422: $Apache::londefdef::table[-1]{'counter_columns'}++;
2423: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2424: if (defined $TeXwidth) {
2425: my $current_length=&recalc($TeXwidth);
2426: $current_length=~/(\d+\.?\d*)/;
2427: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2428: }
2429: &Apache::lonxml::startredirection();
2430: return '';
2431: }
2432:
2433: sub end_td_tex {
2434: my ($parstack,$parser,$safeeval) = @_;
2435: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2436: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2437: my $data = &Apache::lonxml::endredirection();
2438:
2439: # The rowspan array of the table indicates which cells are part of a span.
2440: # n indicates the start of a span set of n rows.
2441: # ^ indicates a cell that continues a span set.
2442: # _ indicates the cell is at the bottom of a span set.
2443: # If this and subsequent cells are part of a rowspan, we must
2444: # push along the row until we find one that is not.
2445:
2446: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2447: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2448: # Part of a span.
2449: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2450: $current_column++;
2451: }
2452: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2453:
2454:
2455:
2456: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2457: if (!$rowspan) {
2458: $rowspan = 1;
2459: }
2460:
2461:
2462:
2463: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] = $rowspan;
2464: for (my $i = 1; $i < $rowspan; $i++) {
2465: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column] = '^';
2466: if ($i == ($rowspan-1)) {
2467: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column] = '_';
2468: }
2469: }
2470:
2471: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2472: if (defined $TeXwidth) {
2473: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2474: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2475: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2476: } else {
2477: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2478: my $garbage_data=$data;
2479: my $fwidth=0;
2480: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2481: my $current_length=&recalc($1);
2482: $current_length=~/(\d+\.?\d*)/;
2483: if ($fwidth<$1) {$fwidth=$1;}
2484: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2485: }
2486: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2487: my $current_length=$1;
2488: if ($fwidth<$current_length) {$fwidth=$current_length;}
2489: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2490: }
2491: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2492: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2493: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2494: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2495: } elsif ($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)*/) {
2496: my $garbage_data=$data;
2497: my $fwidth=0;
2498: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2499: my $current_length=&recalc($1);
2500: $current_length=~/(\d+\.?\d*)/;
2501: if ($fwidth<$1) {$fwidth=$1;}
2502: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2503: }
2504: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2505: my $current_length=&recalc($1);
2506: $current_length=~/(\d+\.?\d*)/;
2507: if ($fwidth<$1) {$fwidth=$1;}
2508: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2509: }
2510: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2511: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2512: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2513: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2514: $data=~s/\\\\\s*$//;
2515: } else {
2516: $data=~s/^\s+(\S.*)/$1/;
2517: $data=~s/(.*\S)\s+$/$1/;
2518: $data=~s/(\s)+/$1/;
2519: my ($current_length,$min_length)=(0,0);
2520: if ($data=~/\\vskip/) {
2521: my $newdata=$data;
2522: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2523: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2524: foreach my $elementdata (@newdata) {
2525: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2526: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2527: my @words=split(/ /,$elementdata);
2528: foreach my $word (@words) {
2529: my $lengthword=2.5*&LATEX_length($word);
2530: if ($min_length<$lengthword) {$min_length=$lengthword;}
2531: }
2532: }
2533: } else {
2534: $current_length=2.5*&LATEX_length($data);
2535: my @words=split(/ /,$data);
2536: foreach my $word (@words) {
2537: my $lengthword=2*&LATEX_length($word);
2538: if ($min_length<$lengthword) {$min_length=$lengthword;}
2539: }
2540: }
2541: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2542: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2543: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2544: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2545: }
2546: }
2547: # Substitute all of the tables nested in this cell in their appropriate places.
2548:
2549:
2550: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2551: for (my $in=0; $in<=$nested_count; $in++) {
2552: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2553: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2554: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2555: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2556:
2557: }
2558: # Should be be killing off the 'include' elements as they're used up?
2559:
2560: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2561:
2562: # Get the column and row spans.
2563: # Colspan can be done via \multicolumn if I can figure out the data structs.
2564:
2565: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2566: if (!$colspan) {
2567: $colspan = 1;
2568: }
2569:
2570:
2571: # the colspan array will indicate how many columns will be spanned by this
2572: # cell..this requires that counter_columns also be adjusted accordingly
2573: # so that the next bunch of text goes in the right cell. Note that since
2574: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2575: #
2576:
2577: $Apache::londefdef::table[-1]{'colspan'}[$current_row][$current_column] = $colspan;
2578: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2579:
2580: # Put empty text in spanned cols.
2581:
2582: for (my $i = 0; $i < ($colspan -1); $i++) {
2583: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2584: }
2585:
2586:
2587: return '';
2588: }
2589:
2590: sub end_td {
2591: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2592: my $currentstring = '';
2593: if ($target eq 'web') {
2594: $currentstring = $token->[2];
2595: } elsif ($target eq 'tex') {
2596: $Apache::londefdef::TD_redirection =0;
2597: &end_td_tex($parstack,$parser,$safeeval);
2598: }
2599: return $currentstring;
2600: }
2601:
2602: #-- <th> tag (end tag optional)
2603: sub start_th {
2604: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2605: my $currentstring = '';
2606: if ($target eq 'web') {
2607: $currentstring = $token->[4];
2608: } elsif ($target eq 'tex') {
2609: $Apache::londefdef::TD_redirection = 1;
2610: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2611: }
2612: return $currentstring;
2613: }
2614:
2615: sub tagg_check {
2616: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2617: my @ar=@$parstack;
2618: for (my $i=$#ar-1;$i>=0;$i--) {
2619: if (lc($$tagstack[$i]) eq $good_tag) {
2620: &start_th_tex($parstack,$parser,$safeeval);
2621: last;
2622: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2623: splice @ar, $i+1;
2624: &end_th_tex(\@ar,$parser,$safeeval);
2625: &start_th_tex($parstack,$parser,$safeeval);
2626: last;
2627: }
2628: }
2629: return '';
2630: }
2631:
2632: sub start_th_tex {
2633: my ($parstack,$parser,$safeeval) = @_;
2634: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2635: if ($alignchar eq '') {
2636: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2637: }
2638: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2639: $Apache::londefdef::table[-1]{'counter_columns'}++;
2640: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2641: if (defined $TeXwidth) {
2642: my $current_length=&recalc($TeXwidth);
2643: $current_length=~/(\d+\.?\d*)/;
2644: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2645: }
2646: &Apache::lonxml::startredirection();
2647: return '';
2648: }
2649:
2650: sub end_th_tex {
2651: my ($parstack,$parser,$safeeval) = @_;
2652: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2653: my $data=&Apache::lonxml::endredirection();
2654: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2655: if (defined $TeXwidth) {
2656: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2657: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2658: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2659: } else {
2660: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2661: my $garbage_data=$data;
2662: my $fwidth=0;
2663: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2664: my $current_length=&recalc($1);
2665: $current_length=~/(\d+\.?\d*)/;
2666: if ($fwidth<$1) {$fwidth=$1;}
2667: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2668: }
2669: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2670: my $current_length=$1;
2671: if ($fwidth<$current_length) {$fwidth=$current_length;}
2672: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2673: }
2674: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2675: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2676: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2677: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2678: } else {
2679: $data=~s/^\s+(\S.*)/$1/;
2680: $data=~s/(.*\S)\s+$/$1/;
2681: $data=~s/(\s)+/$1/;
2682: my ($current_length,$min_length)=(0,0);
2683: if ($data=~/\\vskip/) {
2684: my $newdata=$data;
2685: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2686: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2687: foreach my $elementdata (@newdata) {
2688: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2689: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2690: my @words=split(/ /,$elementdata);
2691: foreach my $word (@words) {
2692: my $lengthword=2.5*&LATEX_length($word);
2693: if ($min_length<$lengthword) {$min_length=$lengthword;}
2694: }
2695: }
2696: } else {
2697: $current_length=2.5*&LATEX_length($data);
2698: my @words=split(/ /,$data);
2699: foreach my $word (@words) {
2700: my $lengthword=2*&LATEX_length($word);
2701: if ($min_length<$lengthword) {$min_length=$lengthword;}
2702: }
2703: }
2704: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2705: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2706: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2707: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2708: }
2709: }
2710: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2711: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2712: }
2713: #make data bold
2714: $data='\textbf{'.$data.'}';
2715: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2716: return'';
2717: }
2718:
2719: sub end_th {
2720: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2721: my $currentstring = &end_p(); # Close any open <p> in the row.
2722: if ($target eq 'web') {
2723: $currentstring .= $token->[2];
2724: } elsif ($target eq 'tex') {
2725: $Apache::londefdef::TD_redirection =0;
2726: &end_th_tex($parstack,$parser,$safeeval);
2727: }
2728: return $currentstring;
2729: }
2730:
2731: #-- <img> tag (end tag forbidden)
2732: #
2733: # Render the <IMG> tag.
2734: # <IMG> has the following attributes (in addition to the
2735: # standard HTML ones:
2736: # TeXwrap - Governs how the tex target will try to wrap text around
2737: # horizontally aligned images.
2738: # TeXwidth - The width of the image when rendered for print (mm).
2739: # TeXheight - The height of the image when rendered for print (mm)
2740: # (Note there seems to also be support for this as a % of page size)
2741: #
2742: sub start_img {
2743: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2744: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2745: undef,1);
2746: if (not $src and ($target eq 'web' or $target eq 'tex')) {
2747: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2748: return '';
2749: }
2750: &Apache::lonxml::extlink($src);
2751: my $currentstring = '';
2752: my $scaling = .3;
2753:
2754: # Render unto browsers that which are the browser's...
2755:
2756: if ($target eq 'web') {
2757: if ($env{'browser.imagesuppress'} ne 'on') {
2758: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2759: } else {
2760: my $alttag= &Apache::lonxml::get_param
2761: ('alt',$parstack,$safeeval,undef,1);
2762: unless ($alttag) {
2763: $alttag=&Apache::lonmeta::alttag
2764: ($Apache::lonxml::pwd[-1],$src);
2765: }
2766: $currentstring.='[IMAGE: '.$alttag.']';
2767: }
2768:
2769: # and render unto TeX that which is LaTeX
2770:
2771: } elsif ($target eq 'tex') {
2772: #
2773: # The alignment will require some superstructure to be put around
2774: # the \includegraphics stuff. At present we can only partially
2775: # simulate the alignments offered by html.
2776: #
2777: #
2778: my $align = lc(&Apache::lonxml::get_param('align',
2779: $parstack,
2780: $safeeval,
2781: undef,1));
2782: if(!$align) {
2783: $align = "bottom"; # This is html's default so it's ours too.
2784: }
2785: #
2786: &Apache::lonxml::debug("Alignemnt = $align");
2787: # LaTeX's image/text wrapping is really bad since it wants to
2788: # make figures float.
2789: # The user has the optional parameter (applicable only to l/r
2790: # alignment to use the picins/parpic directive to get wrapped text
2791: # this is also imperfect.. that's why we give them a choice...
2792: # so they can't yell at us for our choice.
2793: #
2794: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2795: $parstack,
2796: $safeeval,
2797: undef,0);
2798: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2799: if(!$latex_rendering) {
2800: $latex_rendering = "texwrap";
2801: }
2802: # using texwrap inside a table does not work. So, if after all of this,
2803: # texwrap is on, we turn it off if we detect we're in a table:
2804: #
2805: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2806: $latex_rendering = 'parpic';
2807: }
2808: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2809:
2810: #if original gif/jpg/png file exist do following:
2811: my $origsrc=$src;
2812: my ($path,$file) = &get_eps_image($src);
2813: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2814: &Apache::lonxml::debug("path = $path file = $file src = $src");
2815: if (-e $src) {
2816: &Apache::lonxml::debug("$src exists");
2817: my ($height_param,$width_param)=
2818: &image_size($origsrc,0.3,$parstack,$safeeval);
2819: my $destpath = $path;
2820: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2821: my $destfile = $file;
2822: $destfile =~ s/ /\_/g;
2823: my $size;
2824: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2825: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2826: $size='['.$size;
2827: $size=~s/,$/]/;
2828: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2829: .'\includegraphics'.$size.'{'.$destfile.'} ';
2830:
2831: # If there's an alignment specification we need to honor it here.
2832: # For the horizontal alignments, we will also honor the
2833: # value of the latex specfication. The default is parbox,
2834: # and that's used for illegal values too.
2835: #
2836: # Even though we set a default alignment value, the user
2837: # could have given us an illegal value. In that case we
2838: # just use the default alignment of bottom..
2839: if ($align eq "top") {
2840: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2841: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2842: my $offset = $height_param/2;
2843: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2844: } elsif ($align eq "left") {
2845: if ($latex_rendering eq "parpic") {
2846: $currentstring = '\parpic[l]{'.$currentstring.'}';
2847: } else { # wrapfig render
2848: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2849: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2850: }
2851: } elsif ($align eq "right") {
2852: if ($latex_rendering eq "parpic") {
2853: $currentstring = '\parpic[r]{'.$currentstring.'}';
2854: } else { # wrapfig rendering
2855: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2856: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2857:
2858: }
2859: } else { # Bottom is also default.
2860: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2861: }
2862: } else {
2863: &Apache::lonxml::debug("$src does not exist");
2864: #original image file doesn't exist so check the alt attribute
2865: my $alt =
2866: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2867: unless ($alt) {
2868: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2869: }
2870:
2871: if ($alt) { $currentstring .= ' '.$alt.' '; }
2872: }
2873:
2874: # And here's where the semi-quote breaks down: allow the user
2875: # to edit the beast as well by rendering the problem for edit:
2876: } elsif ($target eq 'edit') {
2877: $currentstring .=&Apache::edit::tag_start($target,$token);
2878: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2879: &Apache::edit::browse('src',undef,'alt').' '.
2880: &Apache::edit::search('src',undef,'alt').'<br />';
2881: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2882: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2883: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2884: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2885: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2886: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2887: ['','bottom','middle','top','left','right'],$token,5);
2888: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2889: ['', 'parbox', 'parpic'], $token, 2);
2890: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2891: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2892: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2893: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2894: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2895:
2896:
2897: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2898: if ($width) { $currentstring.=' width="'.$width.'" '; }
2899: if ($height) { $currentstring.=' height="'.$height.'" '; }
2900: $currentstring .= ' />';
2901: } elsif ($target eq 'modified') {
2902: my ($osrc,$owidth,$oheight)=
2903: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2904: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2905: $safeeval,'src','alt','align',
2906: 'TeXwidth','TeXheight', 'TeXwrap',
2907: 'width','height');
2908: my ($nsrc,$nwidth,$nheight)=
2909: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2910: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2911: &image_replication($loc);
2912: my ($iwidth,$iheight);
2913: if (-e $loc) {
2914: my $image = Image::Magick->new;
2915: $image->Read($loc);
2916: ($iwidth, $iheight) = ($image->Get('width'),
2917: $image->Get('height'));
2918: }
2919: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2920: # changed image or no size specified,
2921: # if they didn't explicitly change the
2922: # width or height use the ones from the image
2923: if ($iwidth && $iheight) {
2924: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2925: $token->[2]{'width'} = $iwidth;$ctag=1;
2926: }
2927: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2928: $token->[2]{'height'}=$iheight;$ctag=1;
2929: }
2930: }
2931: }
2932: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2933: # if we don't have a width or height
2934: if ($iwidth && $cwidth && !$cheight) {
2935: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2936: }
2937: if ($iheight && $cheight && !$cwidth) {
2938: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2939: }
2940: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2941: }
2942:
2943: return $currentstring;
2944: }
2945:
2946: sub end_img {
2947: my ($target,$token) = @_;
2948: my $currentstring = '';
2949: if ($target eq 'web') {
2950: $currentstring = $token->[2];
2951: } elsif ($target eq 'tex') {
2952: $currentstring = '';
2953: }
2954: return $currentstring;
2955: }
2956:
2957: #-- <applet> tag (end tag required)
2958: sub start_applet {
2959: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2960:
2961: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2962: &Apache::lonxml::extlink($code);
2963: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2964: undef,1);
2965: &Apache::lonxml::extlink($archive);
2966: my $currentstring = '';
2967: if ($target eq 'web') {
2968: if ($env{'browser.appletsuppress'} ne 'on') {
2969: $currentstring = &Apache::lonenc::encrypt_ref($token,
2970: {'code'=>$code,
2971: 'archive'=>$archive}
2972: );
2973: } else {
2974: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2975: $safeeval,undef,1);
2976: unless ($alttag) {
2977: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2978: $code);
2979: }
2980: $currentstring='[APPLET: '.$alttag.']';
2981: }
2982: } elsif ($target eq 'tex') {
2983: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2984: $safeeval,undef,1);
2985: unless ($alttag) {
2986: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2987: undef,1);
2988: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2989: $code);
2990: }
2991: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2992: '.}\end{center}';
2993: }
2994: return $currentstring;
2995: }
2996:
2997: sub end_applet {
2998: my ($target,$token) = @_;
2999: my $currentstring = '';
3000: if ($target eq 'web') {
3001: $currentstring = $token->[2];
3002: } elsif ($target eq 'tex') {
3003: }
3004: return $currentstring;
3005: }
3006:
3007: #-- <embed> tag (end tag optional/required)
3008: sub start_embed {
3009: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3010: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3011: &Apache::lonxml::extlink($src);
3012: my $currentstring = '';
3013: if ($target eq 'web') {
3014: if ($env{'browser.embedsuppress'} ne 'on') {
3015: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3016: } else {
3017: my $alttag=&Apache::lonxml::get_param
3018: ('alt',$parstack,$safeeval,undef,1);
3019: unless ($alttag) {
3020: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3021: }
3022: $currentstring='[EMBED: '.$alttag.']';
3023: }
3024: } elsif ($target eq 'tex') {
3025: }
3026: return $currentstring;
3027: }
3028:
3029: sub end_embed {
3030: my ($target,$token) = @_;
3031: my $currentstring = '';
3032: if ($target eq 'web') {
3033: $currentstring = $token->[2];
3034: } elsif ($target eq 'tex') {
3035: }
3036: return $currentstring;
3037: }
3038:
3039: #-- <param> tag (end tag forbidden)
3040: sub start_param {
3041: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3042: if (&Apache::lonxml::get_param('name',$parstack,
3043: $safeeval,undef,1)=~/^cabbase$/i) {
3044: my $value=&Apache::lonxml::get_param('value',$parstack,
3045: $safeeval,undef,1);
3046: &Apache::lonxml::extlink($value);
3047: }
3048:
3049: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3050: &Apache::lonxml::extlink($src);
3051: my $currentstring = '';
3052: if ($target eq 'web') {
3053: my %toconvert;
3054: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3055: if ($src) { $toconvert{'src'}= $src; }
3056: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3057: undef,1);
3058: if ($name=~/^cabbase$/i) {
3059: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3060: $safeeval,undef,1);
3061: }
3062: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3063: } elsif ($target eq 'tex') {
3064: }
3065: return $currentstring;
3066: }
3067:
3068: sub end_param {
3069: my ($target,$token) = @_;
3070: my $currentstring = '';
3071: if ($target eq 'web') {
3072: $currentstring = $token->[2];
3073: } elsif ($target eq 'tex') {
3074: }
3075: return $currentstring;
3076: }
3077:
3078: #-- <allow> tag
3079: sub start_allow {
3080: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3081: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3082: &Apache::lonxml::extlink($src);
3083:
3084: if ($target eq 'tex') { &image_replication($src); }
3085: my $result;
3086: if ($target eq 'edit') {
3087: $result .=&Apache::edit::tag_start($target,$token);
3088: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3089: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3090: } elsif ($target eq 'modified') {
3091: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3092: $safeeval,'src');
3093: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3094: }
3095: return $result;
3096: }
3097:
3098: sub end_allow {
3099: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3100: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3101: return '';
3102: }
3103:
3104: #-- Frames (end tag required)
3105: #-- <frameset>
3106: sub start_frameset {
3107: my ($target,$token) = @_;
3108: my $currentstring = ''; # Close any pending para.
3109: if ($target eq 'web') {
3110: if (!$Apache::lonxml::registered &&
3111: $env{'request.state'} eq 'published') {
3112: $currentstring.='<head>'.
3113: &Apache::lonmenu::registerurl(undef,$target).'</head>';
3114: }
3115: my $onLoad='';
3116: foreach my $key (keys(%{$token->[2]})) {
3117: if ($key =~ /^onload$/i) {
3118: $onLoad.=$token->[2]->{$key}.';';
3119: delete($token->[2]->{$key});
3120: }
3121: }
3122: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
3123: my $onUnload='';
3124: foreach my $key (keys(%{$token->[2]})) {
3125: if ($key =~ /^onunload$/i) {
3126: $onUnload.=$token->[2]->{$key}.';';
3127: delete($token->[2]->{$key});
3128: }
3129: }
3130: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
3131: ';'.$onUnload;
3132:
3133: $currentstring .= '<'.$token->[1];
3134: foreach (keys %{$token->[2]}) {
3135: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
3136: }
3137: $currentstring.='>';
3138: }
3139: return $currentstring;
3140: }
3141:
3142: sub end_frameset {
3143: my ($target,$token) = @_;
3144: my $currentstring = '';
3145: if ($target eq 'web') {
3146: $currentstring = $token->[2];
3147: }
3148: return $currentstring;
3149: }
3150:
3151: #-- <xmp> (end tag required)
3152: sub start_xmp {
3153: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3154: my $currentstring = '';
3155: if ($target eq 'web') {
3156: $currentstring .= $token->[4];
3157: } elsif ($target eq 'tex') {
3158: $currentstring .= '\begin{verbatim}';
3159: }
3160: return $currentstring;
3161: }
3162:
3163: sub end_xmp {
3164: my ($target,$token) = @_;
3165: my $currentstring = '';
3166: if ($target eq 'web') {
3167: $currentstring .= $token->[2];
3168: } elsif ($target eq 'tex') {
3169: $currentstring .= '\end{verbatim}';
3170: }
3171: return $currentstring;
3172: }
3173:
3174: #-- <pre> (end tag required)
3175: sub start_pre {
3176: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3177: my $currentstring = &end_p(); # close off pending <p>
3178: if ($target eq 'web') {
3179: $currentstring .= $token->[4];
3180: } elsif ($target eq 'tex') {
3181: $currentstring .= '\begin{verbatim}';
3182: &Apache::lonxml::disable_LaTeX_substitutions;
3183: }
3184: return $currentstring;
3185: }
3186:
3187: sub end_pre {
3188: my ($target,$token) = @_;
3189: my $currentstring = '';
3190: if ($target eq 'web') {
3191: $currentstring .= $token->[2];
3192: } elsif ($target eq 'tex') {
3193: $currentstring .= '\end{verbatim}';
3194: &Apache::lonxml::enable_LaTeX_substitutions;
3195: }
3196: return $currentstring;
3197: }
3198:
3199: #-- <insert>
3200: sub start_insert {
3201: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3202: my $currentstring = '';
3203: if ($target eq 'web') {
3204: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3205: $currentstring .= '<b>'.$display.'</b>';;
3206: }
3207: return $currentstring;
3208: }
3209:
3210: sub end_insert {
3211: my ($target,$token) = @_;
3212: my $currentstring = '';
3213: if ($target eq 'web') {
3214: $currentstring .= '';
3215: }
3216: return $currentstring;
3217: }
3218:
3219: #-- <externallink>
3220: sub start_externallink {
3221: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3222: my $currentstring = '';
3223: if ($target eq 'web') {
3224: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3225: $currentstring .= '<b>'.$display.'</b>';;
3226: }
3227: return $currentstring;
3228: }
3229:
3230: sub end_externallink {
3231: my ($target,$token) = @_;
3232: my $currentstring = '';
3233: if ($target eq 'web') {
3234: $currentstring .= '';
3235: }
3236: return $currentstring;
3237: }
3238:
3239: #-- <blankspace heigth="">
3240: sub start_blankspace {
3241: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3242: my $currentstring = &end_p(); # closes off any unclosed <p>
3243: if ($target eq 'tex') {
3244: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3245: $currentstring .= '\vskip '.$howmuch.' ';
3246: }
3247: return $currentstring;
3248: }
3249:
3250: sub end_blankspace {
3251: my ($target,$token) = @_;
3252: my $currentstring = '';
3253: if ($target eq 'tex') {
3254: $currentstring .= '';
3255: }
3256: return $currentstring;
3257: }
3258:
3259: #-- <abbr> tag (end tag required)
3260: sub start_abbr {
3261: my ($target,$token) = @_;
3262: my $currentstring = '';
3263: if ($target eq 'web') {
3264: $currentstring = $token->[4];
3265: }
3266: return $currentstring;
3267: }
3268:
3269: sub end_abbr {
3270: my ($target,$token) = @_;
3271: my $currentstring = '';
3272: if ($target eq 'web') {
3273: $currentstring = $token->[2];
3274: }
3275: return $currentstring;
3276: }
3277:
3278: #-- <acronym> tag (end tag required)
3279: sub start_acronym {
3280: my ($target,$token) = @_;
3281: my $currentstring = '';
3282: if ($target eq 'web') {
3283: $currentstring = $token->[4];
3284: }
3285: return $currentstring;
3286: }
3287:
3288: sub end_acronym {
3289: my ($target,$token) = @_;
3290: my $currentstring = '';
3291: if ($target eq 'web') {
3292: $currentstring = $token->[2];
3293: }
3294: return $currentstring;
3295: }
3296:
3297: #-- <area> tag (end tag forbidden)
3298: sub start_area {
3299: my ($target,$token) = @_;
3300: my $currentstring = '';
3301: if ($target eq 'web') {
3302: $currentstring = $token->[4];
3303: }
3304: return $currentstring;
3305: }
3306:
3307: sub end_area {
3308: my ($target,$token) = @_;
3309: my $currentstring = '';
3310: if ($target eq 'web') {
3311: $currentstring = $token->[2];
3312: }
3313: return $currentstring;
3314: }
3315:
3316: #-- <base> tag (end tag forbidden)
3317: sub start_base {
3318: my ($target,$token) = @_;
3319: my $currentstring = '';
3320: if ($target eq 'web') {
3321: $currentstring = $token->[4];
3322: }
3323: return $currentstring;
3324: }
3325:
3326: sub end_base {
3327: my ($target,$token) = @_;
3328: my $currentstring = '';
3329: if ($target eq 'web') {
3330: $currentstring = $token->[2];
3331: }
3332: return $currentstring;
3333: }
3334:
3335: #-- <bdo> tag (end tag required)
3336: sub start_bdo {
3337: my ($target,$token) = @_;
3338: my $currentstring = '';
3339: if ($target eq 'web') {
3340: $currentstring = $token->[4];
3341: }
3342: return $currentstring;
3343: }
3344:
3345: sub end_bdo {
3346: my ($target,$token) = @_;
3347: my $currentstring = '';
3348: if ($target eq 'web') {
3349: $currentstring = $token->[2];
3350: }
3351: return $currentstring;
3352: }
3353:
3354: #-- <bgsound> tag (end tag optional)
3355: sub start_bgsound {
3356: my ($target,$token) = @_;
3357: my $currentstring = '';
3358: if ($target eq 'web') {
3359: $currentstring = $token->[4];
3360: }
3361: return $currentstring;
3362: }
3363:
3364: sub end_bgsound {
3365: my ($target,$token) = @_;
3366: my $currentstring = '';
3367: if ($target eq 'web') {
3368: $currentstring = $token->[2];
3369: }
3370: return $currentstring;
3371: }
3372:
3373: #-- <blink> tag (end tag required)
3374: sub start_blink {
3375: my ($target,$token) = @_;
3376: my $currentstring = '';
3377: if ($target eq 'web') {
3378: $currentstring = $token->[4];
3379: }
3380: return $currentstring;
3381: }
3382:
3383: sub end_blink {
3384: my ($target,$token) = @_;
3385: my $currentstring = '';
3386: if ($target eq 'web') {
3387: $currentstring = $token->[2];
3388: }
3389: return $currentstring;
3390: }
3391:
3392: #-- <blockquote> tag (end tag required)
3393: sub start_blockquote {
3394: my ($target,$token) = @_;
3395: my $currentstring = &end_p(); # Close any unclosed <p>
3396: if ($target eq 'web') {
3397: $currentstring .= $token->[4];
3398: }
3399: return $currentstring;
3400: }
3401:
3402: sub end_blockquote {
3403: my ($target,$token) = @_;
3404: my $currentstring = '';
3405: if ($target eq 'web') {
3406: $currentstring = $token->[2];
3407: }
3408: return $currentstring;
3409: }
3410:
3411: #-- <button> tag (end tag required)
3412: sub start_button {
3413: my ($target,$token) = @_;
3414: my $currentstring = '';
3415: if ($target eq 'web') {
3416: $currentstring = $token->[4];
3417: }
3418: return $currentstring;
3419: }
3420:
3421: sub end_button {
3422: my ($target,$token) = @_;
3423: my $currentstring = '';
3424: if ($target eq 'web') {
3425: $currentstring = $token->[2];
3426: }
3427: return $currentstring;
3428: }
3429:
3430: #-- <caption> tag (end tag required)
3431: sub start_caption {
3432: my ($target,$token) = @_;
3433: my $currentstring = '';
3434: if ($target eq 'web') {
3435: $currentstring = $token->[4];
3436: }
3437: return $currentstring;
3438: }
3439:
3440: sub end_caption {
3441: my ($target,$token) = @_;
3442: my $currentstring = '';
3443: if ($target eq 'web') {
3444: $currentstring = $token->[2];
3445: }
3446: return $currentstring;
3447: }
3448:
3449: #-- <col> tag (end tag forbdden)
3450: sub start_col {
3451: my ($target,$token) = @_;
3452: my $currentstring = '';
3453: if ($target eq 'web') {
3454: $currentstring = $token->[4];
3455: }
3456: return $currentstring;
3457: }
3458:
3459: sub end_col {
3460: my ($target,$token) = @_;
3461: my $currentstring = '';
3462: if ($target eq 'web') {
3463: $currentstring = $token->[2];
3464: }
3465: return $currentstring;
3466: }
3467:
3468: #-- <colgroup> tag (end tag optional)
3469: sub start_colgroup {
3470: my ($target,$token) = @_;
3471: my $currentstring = '';
3472: if ($target eq 'web') {
3473: $currentstring = $token->[4];
3474: }
3475: return $currentstring;
3476: }
3477:
3478: sub end_colgroup {
3479: my ($target,$token) = @_;
3480: my $currentstring = '';
3481: if ($target eq 'web') {
3482: $currentstring = $token->[2];
3483: }
3484: return $currentstring;
3485: }
3486:
3487: #-- <del> tag (end tag required)
3488: sub start_del {
3489: my ($target,$token) = @_;
3490: my $currentstring = '';
3491: if ($target eq 'web') {
3492: $currentstring = $token->[4];
3493: }
3494: return $currentstring;
3495: }
3496:
3497: sub end_del {
3498: my ($target,$token) = @_;
3499: my $currentstring = '';
3500: if ($target eq 'web') {
3501: $currentstring = $token->[2];
3502: }
3503: return $currentstring;
3504: }
3505:
3506: #-- <fieldset> tag (end tag required)
3507: sub start_fieldset {
3508: my ($target,$token) = @_;
3509: my $currentstring = '';
3510: if ($target eq 'web') {
3511: $currentstring = $token->[4];
3512: }
3513: return $currentstring;
3514: }
3515:
3516: sub end_fieldset {
3517: my ($target,$token) = @_;
3518: my $currentstring = '';
3519: if ($target eq 'web') {
3520: $currentstring = $token->[2];
3521: }
3522: return $currentstring;
3523: }
3524:
3525: #-- <frame> tag (end tag forbidden)
3526: sub start_frame {
3527: my ($target,$token) = @_;
3528: my $currentstring = '';
3529: if ($target eq 'web') {
3530: $currentstring = $token->[4];
3531: }
3532: return $currentstring;
3533: }
3534:
3535: sub end_frame {
3536: my ($target,$token) = @_;
3537: my $currentstring = '';
3538: if ($target eq 'web') {
3539: $currentstring = $token->[2];
3540: }
3541: return $currentstring;
3542: }
3543:
3544: #-- <iframe> tag (end tag required)
3545: sub start_iframe {
3546: my ($target,$token) = @_;
3547: my $currentstring = '';
3548: if ($target eq 'web') {
3549: $currentstring = $token->[4];
3550: }
3551: return $currentstring;
3552: }
3553:
3554: sub end_iframe {
3555: my ($target,$token) = @_;
3556: my $currentstring = '';
3557: if ($target eq 'web') {
3558: $currentstring = $token->[2];
3559: }
3560: return $currentstring;
3561: }
3562:
3563: #-- <ins> tag (end tag required)
3564: sub start_ins {
3565: my ($target,$token) = @_;
3566: my $currentstring = '';
3567: if ($target eq 'web') {
3568: $currentstring = $token->[4];
3569: }
3570: return $currentstring;
3571: }
3572:
3573: sub end_ins {
3574: my ($target,$token) = @_;
3575: my $currentstring = '';
3576: if ($target eq 'web') {
3577: $currentstring = $token->[2];
3578: }
3579: return $currentstring;
3580: }
3581:
3582: #-- <isindex> tag (end tag forbidden)
3583: sub start_isindex {
3584: my ($target,$token) = @_;
3585: my $currentstring = '';
3586: if ($target eq 'web') {
3587: $currentstring = $token->[4];
3588: }
3589: return $currentstring;
3590: }
3591:
3592: sub end_isindex {
3593: my ($target,$token) = @_;
3594: my $currentstring = '';
3595: if ($target eq 'web') {
3596: $currentstring = $token->[2];
3597: }
3598: return $currentstring;
3599: }
3600:
3601: #-- <keygen> tag (end tag forbidden)
3602: sub start_keygen {
3603: my ($target,$token) = @_;
3604: my $currentstring = '';
3605: if ($target eq 'web') {
3606: $currentstring = $token->[4];
3607: }
3608: return $currentstring;
3609: }
3610:
3611: sub end_keygen {
3612: my ($target,$token) = @_;
3613: my $currentstring = '';
3614: if ($target eq 'web') {
3615: $currentstring = $token->[2];
3616: }
3617: return $currentstring;
3618: }
3619:
3620: #-- <label> tag
3621: sub start_label {
3622: my ($target,$token) = @_;
3623: my $currentstring = '';
3624: if ($target eq 'web') {
3625: $currentstring = $token->[4];
3626: }
3627: return $currentstring;
3628: }
3629:
3630: sub end_label {
3631: my ($target,$token) = @_;
3632: my $currentstring = '';
3633: if ($target eq 'web') {
3634: $currentstring = $token->[2];
3635: }
3636: return $currentstring;
3637: }
3638:
3639: #-- <layer> tag (end tag required)
3640: sub start_layer {
3641: my ($target,$token) = @_;
3642: my $currentstring = '';
3643: if ($target eq 'web') {
3644: $currentstring = $token->[4];
3645: }
3646: return $currentstring;
3647: }
3648:
3649: sub end_layer {
3650: my ($target,$token) = @_;
3651: my $currentstring = '';
3652: if ($target eq 'web') {
3653: $currentstring = $token->[2];
3654: }
3655: return $currentstring;
3656: }
3657:
3658: #-- <legend> tag (end tag required)
3659: sub start_legend {
3660: my ($target,$token) = @_;
3661: my $currentstring = '';
3662: if ($target eq 'web') {
3663: $currentstring = $token->[4];
3664: }
3665: return $currentstring;
3666: }
3667:
3668: sub end_legend {
3669: my ($target,$token) = @_;
3670: my $currentstring = '';
3671: if ($target eq 'web') {
3672: $currentstring = $token->[2];
3673: }
3674: return $currentstring;
3675: }
3676:
3677: #-- <link> tag (end tag forbidden)
3678: sub start_link {
3679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3680: my $currentstring = '';
3681: if ($target eq 'web') {
3682: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3683: undef,1);
3684: &Apache::lonxml::extlink($href);
3685: $currentstring = $token->[4];
3686: }
3687: return $currentstring;
3688: }
3689:
3690: sub end_link {
3691: my ($target,$token) = @_;
3692: my $currentstring = '';
3693: if ($target eq 'web') {
3694: $currentstring = $token->[2];
3695: }
3696: return $currentstring;
3697: }
3698:
3699: #-- <marquee> tag (end tag optional)
3700: sub start_marquee {
3701: my ($target,$token) = @_;
3702: my $currentstring = '';
3703: if ($target eq 'web') {
3704: $currentstring = $token->[4];
3705: }
3706: return $currentstring;
3707: }
3708:
3709: sub end_marquee {
3710: my ($target,$token) = @_;
3711: my $currentstring = '';
3712: if ($target eq 'web') {
3713: $currentstring = $token->[2];
3714: }
3715: return $currentstring;
3716: }
3717:
3718: #-- <multicol> tag (end tag required)
3719: sub start_multicol {
3720: my ($target,$token) = @_;
3721: my $currentstring = &end_p(); # Close any pending <p>
3722: if ($target eq 'web') {
3723: $currentstring .= $token->[4];
3724: }
3725: return $currentstring;
3726: }
3727:
3728: sub end_multicol {
3729: my ($target,$token) = @_;
3730: my $currentstring = '';
3731: if ($target eq 'web') {
3732: $currentstring = $token->[2];
3733: }
3734: return $currentstring;
3735: }
3736:
3737: #-- <nobr> tag (end tag required)
3738: sub start_nobr {
3739: my ($target,$token) = @_;
3740: my $currentstring = '';
3741: if ($target eq 'web') {
3742: $currentstring = $token->[4];
3743: } elsif ($target eq 'tex') {
3744: $currentstring='\mbox{';
3745: }
3746: return $currentstring;
3747: }
3748:
3749: sub end_nobr {
3750: my ($target,$token) = @_;
3751: my $currentstring = '';
3752: if ($target eq 'web') {
3753: $currentstring = $token->[2];
3754: } elsif ($target eq 'tex') {
3755: $currentstring='}';
3756: }
3757: return $currentstring;
3758: }
3759:
3760: #-- <noembed> tag (end tag required)
3761: sub start_noembed {
3762: my ($target,$token) = @_;
3763: my $currentstring = '';
3764: if ($target eq 'web') {
3765: $currentstring = $token->[4];
3766: }
3767: return $currentstring;
3768: }
3769:
3770: sub end_noembed {
3771: my ($target,$token) = @_;
3772: my $currentstring = '';
3773: if ($target eq 'web') {
3774: $currentstring = $token->[2];
3775: }
3776: return $currentstring;
3777: }
3778:
3779: #-- <noframes> tag (end tag required)
3780: sub start_noframes {
3781: my ($target,$token) = @_;
3782: my $currentstring = '';
3783: if ($target eq 'web') {
3784: $currentstring = $token->[4];
3785: }
3786: return $currentstring;
3787: }
3788:
3789: sub end_noframes {
3790: my ($target,$token) = @_;
3791: my $currentstring = '';
3792: if ($target eq 'web') {
3793: $currentstring = $token->[2];
3794: }
3795: return $currentstring;
3796: }
3797:
3798: #-- <nolayer> tag (end tag required)
3799: sub start_nolayer {
3800: my ($target,$token) = @_;
3801: my $currentstring = '';
3802: if ($target eq 'web') {
3803: $currentstring = $token->[4];
3804: }
3805: return $currentstring;
3806: }
3807:
3808: sub end_nolayer {
3809: my ($target,$token) = @_;
3810: my $currentstring = '';
3811: if ($target eq 'web') {
3812: $currentstring = $token->[2];
3813: }
3814: return $currentstring;
3815: }
3816:
3817: #-- <noscript> tag (end tag required)
3818: sub start_noscript {
3819: my ($target,$token) = @_;
3820: my $currentstring = '';
3821: if ($target eq 'web') {
3822: $currentstring = $token->[4];
3823: }
3824: return $currentstring;
3825: }
3826:
3827: sub end_noscript {
3828: my ($target,$token) = @_;
3829: my $currentstring = '';
3830: if ($target eq 'web') {
3831: $currentstring = $token->[2];
3832: }
3833: return $currentstring;
3834: }
3835:
3836: #-- <object> tag (end tag required)
3837: sub start_object {
3838: my ($target,$token) = @_;
3839: my $currentstring = '';
3840: if ($target eq 'web') {
3841: $currentstring = $token->[4];
3842: }
3843: return $currentstring;
3844: }
3845:
3846: sub end_object {
3847: my ($target,$token) = @_;
3848: my $currentstring = '';
3849: if ($target eq 'web') {
3850: $currentstring = $token->[2];
3851: }
3852: return $currentstring;
3853: }
3854:
3855: #-- <optgroup> tag (end tag required)
3856: sub start_optgroup {
3857: my ($target,$token) = @_;
3858: my $currentstring = '';
3859: if ($target eq 'web') {
3860: $currentstring = $token->[4];
3861: }
3862: return $currentstring;
3863: }
3864:
3865: sub end_optgroup {
3866: my ($target,$token) = @_;
3867: my $currentstring = '';
3868: if ($target eq 'web') {
3869: $currentstring = $token->[2];
3870: }
3871: return $currentstring;
3872: }
3873:
3874: #-- <samp> tag (end tag required)
3875: sub start_samp {
3876: my ($target,$token) = @_;
3877: my $currentstring = '';
3878: if ($target eq 'web') {
3879: $currentstring = $token->[4];
3880: } elsif ($target eq 'tex') {
3881: $currentstring='\texttt{';
3882: }
3883: return $currentstring;
3884: }
3885:
3886: sub end_samp {
3887: my ($target,$token) = @_;
3888: my $currentstring = '';
3889: if ($target eq 'web') {
3890: $currentstring = $token->[2];
3891: } elsif ($target eq 'tex') {
3892: $currentstring='}';
3893: }
3894: return $currentstring;
3895: }
3896:
3897: #-- <server> tag
3898: sub start_server {
3899: my ($target,$token) = @_;
3900: my $currentstring = '';
3901: if ($target eq 'web') {
3902: $currentstring = $token->[4];
3903: }
3904: return $currentstring;
3905: }
3906:
3907: sub end_server {
3908: my ($target,$token) = @_;
3909: my $currentstring = '';
3910: if ($target eq 'web') {
3911: $currentstring = $token->[2];
3912: }
3913: return $currentstring;
3914: }
3915:
3916: #-- <spacer> tag (end tag forbidden)
3917: sub start_spacer {
3918: my ($target,$token) = @_;
3919: my $currentstring = &end_p(); # Close off any open <p> tag.
3920: if ($target eq 'web') {
3921: $currentstring .= $token->[4];
3922: }
3923: return $currentstring;
3924: }
3925:
3926: sub end_spacer {
3927: my ($target,$token) = @_;
3928: my $currentstring = '';
3929: if ($target eq 'web') {
3930: $currentstring = $token->[2];
3931: }
3932: return $currentstring;
3933: }
3934:
3935: #-- <span> tag (end tag required)
3936: sub start_span {
3937: my ($target,$token) = @_;
3938: my $currentstring = '';
3939: if ($target eq 'web') {
3940: $currentstring = $token->[4];
3941: }
3942: return $currentstring;
3943: }
3944:
3945: sub end_span {
3946: my ($target,$token) = @_;
3947: my $currentstring = '';
3948: if ($target eq 'web') {
3949: $currentstring = $token->[2];
3950: }
3951: return $currentstring;
3952: }
3953:
3954: #-- <tbody> tag (end tag optional)
3955: sub start_tbody {
3956: my ($target,$token) = @_;
3957: my $currentstring = '';
3958: if ($target eq 'web') {
3959: $currentstring = $token->[4];
3960: }
3961: return $currentstring;
3962: }
3963:
3964: sub end_tbody {
3965: my ($target,$token) = @_;
3966: my $currentstring = '';
3967: if ($target eq 'web') {
3968: $currentstring = $token->[2];
3969: }
3970: return $currentstring;
3971: }
3972:
3973: #-- <tfoot> tag (end tag optional)
3974: sub start_tfoot {
3975: my ($target,$token) = @_;
3976: my $currentstring = '';
3977: if ($target eq 'web') {
3978: $currentstring = $token->[4];
3979: }
3980: return $currentstring;
3981: }
3982:
3983: sub end_tfoot {
3984: my ($target,$token) = @_;
3985: my $currentstring = '';
3986: if ($target eq 'web') {
3987: $currentstring = $token->[2];
3988: }
3989: return $currentstring;
3990: }
3991:
3992: #-- <thead> tag (end tag optional)
3993: sub start_thead {
3994: my ($target,$token) = @_;
3995: my $currentstring = '';
3996: if ($target eq 'web') {
3997: $currentstring = $token->[4];
3998: }
3999: return $currentstring;
4000: }
4001:
4002: sub end_thead {
4003: my ($target,$token) = @_;
4004: my $currentstring = '';
4005: if ($target eq 'web') {
4006: $currentstring = $token->[2];
4007: }
4008: return $currentstring;
4009: }
4010:
4011: #-- <var> tag
4012: sub start_var {
4013: my ($target,$token) = @_;
4014: my $currentstring = '';
4015: if ($target eq 'web') {
4016: $currentstring = $token->[4];
4017: } elsif ($target eq 'tex') {
4018: $currentstring = '\textit{';
4019: }
4020: return $currentstring;
4021: }
4022:
4023: sub end_var {
4024: my ($target,$token) = @_;
4025: my $currentstring = '';
4026: if ($target eq 'web') {
4027: $currentstring = $token->[2];
4028: } elsif ($target eq 'tex') {
4029: $currentstring = '}';
4030: }
4031: return $currentstring;
4032: }
4033:
4034: #-- <wbr> tag (end tag forbidden)
4035: sub start_wbr {
4036: my ($target,$token) = @_;
4037: my $currentstring = '';
4038: if ($target eq 'web') {
4039: $currentstring = $token->[4];
4040: }
4041: return $currentstring;
4042: }
4043:
4044: sub end_wbr {
4045: my ($target,$token) = @_;
4046: my $currentstring = '';
4047: if ($target eq 'web') {
4048: $currentstring = $token->[2];
4049: }
4050: return $currentstring;
4051: }
4052:
4053: #-- <hideweboutput> tag
4054: sub start_hideweboutput {
4055: my ($target,$token) = @_;
4056: if ($target eq 'web') {
4057: &Apache::lonxml::startredirection();
4058: }
4059: return '';
4060: }
4061:
4062: sub end_hideweboutput {
4063: my ($target,$token) = @_;
4064: my $currentstring = '';
4065: if ($target eq 'web') {
4066: $currentstring = &Apache::lonxml::endredirection();
4067: }
4068: return '';
4069: }
4070:
4071:
4072: sub image_replication {
4073: my $src = shift;
4074: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4075: #replicates eps or ps
4076: my $epssrc = my $pssrc = $src;
4077: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4078: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4079: if (not -e $epssrc && not -e $pssrc) {
4080: my $result=&Apache::lonnet::repcopy($epssrc);
4081: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4082: }
4083: return '';
4084: }
4085: #
4086: # Get correct sizing parameter for an image given
4087: # it's initial ht. and wid. This allows sizing of
4088: # images that are generated on-the-fly (e.g. gnuplot)
4089: # as well as serving as a utility for image_size.
4090: #
4091: # Parameter:
4092: # height_param
4093: # width_param - Initial picture dimensions.
4094: # scaling - A scale factor.
4095: # parstack, - the current stack of tag attributes
4096: # from the xml parser
4097: # safeeval, - pointer to the safespace
4098: # depth, - from what level in the stack to look for attributes
4099: # (assumes -1 if unspecified)
4100: # cis - look for attrubutes case insensitively
4101: # (assumes false)
4102: #
4103: # Returns:
4104: # height, width - new dimensions.
4105: #
4106: sub resize_image {
4107: my ($height_param, $width_param, $scaling,
4108: $parstack, $safeeval, $depth, $cis) = @_;
4109:
4110: # First apply the scaling...
4111:
4112: $height_param = $height_param * $scaling;
4113: $width_param = $width_param * $scaling;
4114:
4115: #do we have any specified LaTeX size of the picture?
4116: my $toget='TeXwidth';
4117: if ($cis) {
4118: $toget=lc($toget);
4119: }
4120: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4121: $safeeval,$depth,$cis);
4122: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4123: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4124: $safeeval,$depth,$cis);
4125: #do we have any specified web size of the picture?
4126: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4127: $depth,1);
4128: if ($TeXwidth) {
4129: my $old_width_param=$width_param;
4130: if ($TeXwidth=~/(\d+)\s*\%/) {
4131: $width_param = $1*$env{'form.textwidth'}/100;
4132: } else {
4133: $width_param = $TeXwidth;
4134: }
4135: if ($TeXheight) {
4136: $height_param = $TeXheight;
4137: } elsif ($old_width_param) {
4138: $height_param=$TeXwidth/$old_width_param*$height_param;
4139: }
4140: } elsif ($TeXheight) {
4141: $height_param = $TeXheight;
4142: if ($height_param) {
4143: $width_param = $TeXheight/$height_param*$width_param;
4144: }
4145: } elsif ($width) {
4146: my $old_width_param=$width_param;
4147: $width_param = $width*$scaling;
4148: if ($old_width_param) {
4149: $height_param=$width_param/$old_width_param*$height_param;
4150: }
4151: }
4152: if ($width_param > $env{'form.textwidth'}) {
4153: my $old_width_param=$width_param;
4154: $width_param =0.95*$env{'form.textwidth'};
4155: if ($old_width_param) {
4156: $height_param=$width_param/$old_width_param*$height_param;
4157: }
4158: }
4159:
4160: return ($height_param, $width_param);
4161: }
4162:
4163: sub image_size {
4164: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4165:
4166: #size of image from gif/jpg/jpeg/png
4167: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4168: if (-e $ressrc) {
4169: $src = $ressrc;
4170: }
4171: my $image = Image::Magick->new;
4172: my $current_figure = $image->Read($src);
4173: my $width_param = $image->Get('width');
4174: my $height_param = $image->Get('height');
4175: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4176: undef($image);
4177:
4178: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4179: $scaling, $parstack, $safeeval,
4180: $depth, $cis);
4181:
4182: return ($height_param, $width_param);
4183: }
4184:
4185: sub image_width {
4186: my ($height, $width) = &image_size(@_);
4187: return $width;
4188: }
4189: # Not yet 100% sure this is correct in all circumstances..
4190: # due to my uncertainty about mods to image_size.
4191: #
4192: sub image_height {
4193: my ($height, $width) = &image_size(@_);
4194: return $height;
4195: }
4196:
4197: sub get_eps_image {
4198: my ($src)=@_;
4199: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4200:
4201: # In order to prevent the substitution of the alt text, we need to
4202: # be sure the orig_src file is on system now so:
4203:
4204: if (! -e $orig_src) {
4205: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4206: }
4207: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4208: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4209: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4210: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4211: &Apache::lonxml::debug("Filelocation gives: $src");
4212: if (! -e $src) {
4213: &Apache::lonxml::debug("$src does not exist");
4214: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4215: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4216: #if replication failed try to find ps file
4217: $src=~s/\.eps$/\.ps/;
4218: &Apache::lonxml::debug("Now looking for $src");
4219: #if no ps file try to replicate it.
4220: my $didrepcopy = &Apache::lonnet::repcopy($src);
4221: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4222: if ( (not -e $src) ||
4223: ($didrepcopy ne 'ok')) {
4224: &Apache::lonxml::debug("Failed to find or replicate $src");
4225:
4226: #if replication failed try to produce eps file dynamically
4227: $src=~s/\.ps$/\.eps/;
4228: my $temp_file;
4229: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4230: my $newsrc=$orig_src;
4231: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4232: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4233: print FILE "$newsrc\n";
4234: close FILE;
4235: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4236: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4237: if ($sext ne "") { # Put the ext. back in to uniquify.
4238: $src =~ s/\.eps$/$sext.eps/;
4239: }
4240: }
4241: }
4242: }
4243: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4244: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4245: return ($path.'/',$file);
4246: }
4247:
4248: sub eps_generation {
4249: my ($src,$file,$width_param) = @_;
4250: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4251: my $temp_file = Apache::File->new('>>'.$filename);
4252: print $temp_file "$src\n";
4253: my $newsrc = $src;
4254: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4255: $newsrc=~s/\/home\/httpd\/html\/res//;
4256: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4257: $newsrc=~s/\/\.\//\//;
4258: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4259: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4260: $newsrc=~s/\/home\/httpd\/lonUsers//;
4261: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4262: }
4263: if ($newsrc=~/\/userfiles\//) {
4264: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4265: } else {
4266: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4267: }
4268: }
4269:
4270: sub file_path {
4271: my $src=shift;
4272: my ($file,$path);
4273: if ($src =~ m!(.*)/([^/]*)$!) {
4274: $file = $2;
4275: $path = $1.'/';
4276: }
4277: return $file,$path;
4278: }
4279: # Converts a measurement in to mm from any of
4280: # the other valid LaTeX units of measure.
4281: # If the units of measure are missing from the
4282: # parameter, it is assumed to be in and returned
4283: # with mm units of measure
4284: sub recalc {
4285: my $argument = shift;
4286: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4287: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4288: my $value=$1;
4289: my $units=$2;
4290: if ($units eq 'cm') {
4291: $value*=10;
4292: } elsif ($units eq 'in') {
4293: $value*=25.4;
4294: } elsif ($units eq 'pc') {
4295: $value*=(25.4*12/72.27);
4296: } elsif ($units eq 'pt') {
4297: $value*=(25.4/72.27);
4298: }
4299: return $value.' mm';
4300: }
4301:
4302: sub LATEX_length {
4303: my $garbage=shift;
4304: $garbage=~s/^\s+$//;
4305: $garbage=~s/^\s+(\S.*)/$1/;#space before
4306: $garbage=~s/(.*\S)\s+$/$1/;#space after
4307: $garbage=~s/(\s)+/$1/;#only one space
4308: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4309: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4310: $garbage=~s/([^\\])\$/$1/g;#$
4311: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4312: $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;
4313: $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;
4314: $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;
4315: $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;
4316: $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;
4317: $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;
4318: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4319: #remove some other LaTeX command
4320: $garbage=~s|\\(\w+)\\|\\|g;
4321: $garbage=~s|\\(\w+)(\s*)|$2|g;
4322: $garbage=~s|\+|11|g;
4323: my $value=length($garbage);
4324: return $value;
4325: }
4326:
4327:
4328: # is_inside_of $tagstack $tag
4329: # This sub returns true if the current state of Xml processing
4330: # is inside of the tag.
4331: # Parameters:
4332: # tagstack - The tagstack from the parser.
4333: # tag - The tag (without the <>'s.).
4334: # Sample usage:
4335: # if (is_inside_of($tagstack "table")) {
4336: # # I'm in a table....
4337: # }
4338: sub is_inside_of {
4339: my ($tagstack, $tag) = @_;
4340: my @stack = @$tagstack;
4341: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4342: if ($stack[$i] eq $tag) {
4343: return 1;
4344: }
4345: }
4346: return 0;
4347: }
4348:
4349:
4350: 1;
4351: __END__
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