1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.299 2005/12/01 18:46:17 albertel Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: #use Data::Dumper;
52:
53: BEGIN {
54:
55: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
56:
57: }
58:
59: #
60: # Dumps all elements of the table structure.
61: # Need this 'cause evidently when given an array, Data::Dumper only seems
62: # to dump element 0.
63: #
64: #sub debug_dump_table {
65: # my $lastrow = $#Apache::londefdef::table;
66: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
67: # my $row;
68: # for ($row =0; $row <= $lastrow; $row++ ) {
69: # my $text = Dumper($Apache::londefdef::table[$row]);
70: # &Apache::lonnet::logthis("table [ $row ]".$text);
71: #
72: # }
73: #}
74:
75: sub initialize_londefdef {
76: $Apache::londefdef::TD_redirection=0;
77: @Apache::londefdef::table = ();
78: $Apache::londefdef::select=0;
79: undef(@Apache::londefdef::description);
80: @Apache::londefdef::DD=(0);
81: @Apache::londefdef::DT=(0);
82: @Apache::londefdef::seenDT=(0);
83: $Apache::londefdef::list_index=0;
84: }
85:
86: #======================= TAG SUBROUTINES =====================
87: #-- <output>
88: sub start_output {
89: my ($target) = @_;
90: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
91: return '';
92: }
93: sub end_output {
94: my ($target) = @_;
95: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
96: return '';
97: }
98: #-- <m> tag
99: sub start_m {
100: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
101: my $currentstring = '';
102: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
103: if ($target eq 'web' || $target eq 'analyze') {
104: &Apache::lonxml::debug("M is starting with:$inside:");
105: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
106: if ($eval eq 'on') {
107: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
108: #&Apache::lonxml::debug("M is evaulated to:$inside:");
109: }
110: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
111: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
112: if ($Apache::lontexconvert::errorstring) {
113: &Apache::lonxml::warning("tth error: ".
114: $Apache::lontexconvert::errorstring);
115: $Apache::lontexconvert::errorstring='';
116: }
117: #&Apache::lonxml::debug("M is ends with:$currentstring:");
118: $Apache::lonxml::post_evaluate=0;
119: } elsif ($target eq 'tex') {
120: $currentstring = $inside;
121: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
122: if ($eval eq 'on') {
123: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
124: }
125: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
126: # detect simple math mode entry exits, and convert them
127: # to use \ensuremath
128: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
129: $currentstring=~s/^(\s*)\$/$1/;
130: $currentstring=~s/\$(\s*)$/$1/;
131: $currentstring='\ensuremath{'.$currentstring.'}';
132: }
133: $Apache::lonxml::post_evaluate=0;
134: }
135: return $currentstring;
136: }
137:
138: sub end_m {
139: my ($target,$token) = @_;
140: my $currentstring = '';
141: if ($target eq 'tex') {
142: $currentstring = "";
143: }
144: return $currentstring;
145: }
146:
147: sub start_tthoption {
148: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
149: my $result;
150: if ($target eq 'web') {
151: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
152: $style);
153: $inside=~s/^\s*//;
154: if ($env{'browser.mathml'}) {
155: &tth::ttmoptions($inside);
156: } else {
157: &tth::tthoptions($inside);
158: }
159: }
160: return $result;
161: }
162:
163: sub end_tthoption {
164: my ($target,$token) = @_;
165: my $result;
166: return $result;
167: }
168:
169: #-- <html> tag (end tag optional)
170: sub start_html {
171: my ($target,$token) = @_;
172: my $currentstring = '';
173: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
174: &Apache::lontexconvert::init_tth();
175: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
176: $currentstring = &Apache::lonxml::xmlbegin();
177: } elsif ($target eq 'tex') {
178: $currentstring .= '\documentclass[letterpaper]{article}';
179: if (($env{'form.latex_type'}=~'batchmode') ||
180: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
181: $currentstring .= '\newcommand{\keephidden}[1]{}'.
182: '\renewcommand{\deg}{$^{\circ}$}'.
183: '\usepackage{longtable}'.
184: '\usepackage{textcomp}'.
185: '\usepackage{makeidx}'.
186: '\usepackage[dvips]{graphicx}'.
187: '\usepackage{wrapfig}'.
188: '\usepackage{picins}'.
189: '\usepackage{epsfig}'.
190: '\usepackage{calc}'.
191: '\usepackage{amsmath}'.
192: '\usepackage{amssymb}'.
193: '\usepackage{amsfonts}'.
194: '\usepackage{amsthm}'.
195: '\usepackage{amscd}'.
196: '\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}}'.
197: '\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}}';
198: }
199: return $currentstring;
200: }
201:
202: sub end_html {
203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
204: my $currentstring = '';
205: if ($target eq 'web') {
206: $currentstring = '</html>';
207: }
208: return $currentstring;
209: }
210:
211: #-- <head> tag (end tag optional)
212: sub start_head {
213: my ($target,$token) = @_;
214: my $currentstring = '';
215: if ($target eq 'web') {
216: $currentstring = $token->[4].&Apache::lonxml::fontsettings();
217: }
218: return $currentstring;
219: }
220:
221: sub end_head {
222: my ($target,$token) = @_;
223: my $currentstring = '';
224: if ($target eq 'web' && $env{'request.state'} eq 'published') {
225: $currentstring = &Apache::lonmenu::registerurl(undef,$target).
226: $token->[2];
227: }
228: return $currentstring;
229: }
230:
231: #-- <map> tag (end tag required)
232: sub start_map {
233: my ($target,$token) = @_;
234: my $currentstring = '';
235: if ($target eq 'web') {
236: $currentstring = $token->[4];
237: }
238: return $currentstring;
239: }
240:
241: sub end_map {
242: my ($target,$token) = @_;
243: my $currentstring = '';
244: if ($target eq 'web') {
245: $currentstring = $token->[2];
246: }
247: return $currentstring;
248: }
249:
250: #-- <select> tag (end tag required)
251: sub start_select {
252: my ($target,$token) = @_;
253: my $currentstring = '';
254: if ($target eq 'web') {
255: $currentstring = $token->[4];
256: } elsif ($target eq 'tex') {
257: $Apache::londefdef::select=0;
258: }
259: return $currentstring;
260: }
261:
262: sub end_select {
263: my ($target,$token) = @_;
264: my $currentstring = '';
265: if ($target eq 'web') {
266: $currentstring = $token->[2];
267: }
268: return $currentstring;
269: }
270:
271: #-- <option> tag (end tag optional)
272: sub start_option {
273: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
274: my $currentstring = '';
275: if ($target eq 'web') {
276: $currentstring = $token->[4];
277: } elsif ($target eq 'tex') {
278: $Apache::londefdef::select++;
279: if ($Apache::londefdef::select == 1) {
280: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
281: } else {
282: $currentstring='\keephidden{';
283: }
284: }
285: return $currentstring;
286: }
287:
288: sub end_option {
289: my ($target,$token) = @_;
290: my $currentstring = '';
291: if ($target eq 'web') {
292: $currentstring = $token->[2];
293: } elsif ($target eq 'tex') {
294: $currentstring='}';
295: }
296: return $currentstring;
297: }
298:
299: #-- <input> tag (end tag forbidden)
300: sub start_input {
301: my ($target,$token) = @_;
302: my $currentstring = '';
303: if ($target eq 'web') {
304: $currentstring = $token->[4];
305: }
306: return $currentstring;
307: }
308:
309: sub end_input {
310: my ($target,$token) = @_;
311: my $currentstring = '';
312: if ($target eq 'web') {
313: $currentstring = $token->[2];
314: }
315: return $currentstring;
316: }
317:
318: #-- <textarea> tag (end tag required)
319: sub start_textarea {
320: my ($target,$token) = @_;
321: my $currentstring = '';
322: if ($target eq 'web') {
323: $currentstring = $token->[4];
324: }
325: return $currentstring;
326: }
327:
328: sub end_textarea {
329: my ($target,$token) = @_;
330: my $currentstring = '';
331: if ($target eq 'web') {
332: $currentstring = $token->[2];
333: }
334: return $currentstring;
335: }
336:
337: #-- <form> tag (end tag required)
338: sub start_form {
339: my ($target,$token) = @_;
340: my $currentstring = '';
341: if ($target eq 'web') {
342: $currentstring = $token->[4];
343: }
344: return $currentstring;
345: }
346:
347: sub end_form {
348: my ($target,$token) = @_;
349: my $currentstring = '';
350: if ($target eq 'web') {
351: $currentstring = $token->[2];
352: }
353: return $currentstring;
354: }
355:
356: #-- <title> tag (end tag required)
357: sub start_title {
358: my ($target,$token) = @_;
359: my $currentstring = '';
360: if ($target eq 'web') {
361: $currentstring = $token->[4];
362: } elsif ($target eq 'tex') {
363: $currentstring .= '\keephidden{Title of the document: '
364: }
365: if ($target eq 'meta') {
366: $currentstring='<title>';
367: &start_output($target);
368: }
369: return $currentstring;
370: }
371:
372: sub end_title {
373: my ($target,$token) = @_;
374: my $currentstring = '';
375: if ($target eq 'web') {
376: $currentstring = $token->[2];
377: } elsif ($target eq 'tex') {
378: $currentstring .= '}';
379: }
380: if ($target eq 'meta') {
381: &end_output($target);
382: $currentstring='</title>';
383: }
384: return $currentstring;
385: }
386:
387: #-- <meta> tag (end tag forbidden)
388: sub start_meta {
389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
390: my $currentstring = '';
391: if ($target eq 'web') {
392: my $args='';
393: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
394: if ($args eq '') {
395: &Apache::lonxml::get_all_text("/meta",$parser,$style);
396: } else {
397: $currentstring = $token->[4];
398: }
399: } elsif ($target eq 'meta') {
400: unless (&Apache::lonxml::get_param
401: ('http-equiv',$parstack,$safeeval,undef,1)) {
402: my $name=$token->[2]->{'name'};
403: $name=~tr/A-Z/a-z/;
404: $name=~s/\s/\_/gs;
405: $name=~s/\W//gs;
406: if ($name) {
407: $currentstring='<'.$name;
408: my $display=&Apache::lonxml::get_param
409: ('display',$parstack,$safeeval,undef,1);
410: if ($display) {
411: $display=~s/\"/\'/g;
412: $currentstring.=' display="'.$display.'"';
413: }
414: $currentstring.='>'.
415: &Apache::lonxml::get_param
416: ('content',$parstack,$safeeval,undef,1).
417: '</'.$name.'>';
418: }
419: my $display=&Apache::lonxml::get_param
420: ('display',$parstack,$safeeval,undef,1);
421: if ($display) {
422: $display=&HTML::Entities::encode($display,'<>&"');
423: $currentstring.='<'.$name.'.display>'.$display.
424: '</'.$name.'.display>';
425: }
426: }
427: } elsif ($target eq 'tex') {
428: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
429: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
430: if ((not defined $content) && (not defined $name)) {
431: &Apache::lonxml::startredirection();
432: }
433: }
434: return $currentstring;
435: }
436:
437: sub end_meta {
438: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
439: my $currentstring = '';
440: if ($target eq 'web') {
441: my $args='';
442: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
443: if ($args ne '') {
444: $currentstring = $token->[4];
445: }
446: } elsif ($target eq 'tex') {
447: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
448: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
449: if ((not defined $content) && (not defined $name)) {
450: &Apache::lonxml::endredirection();
451: }
452: }
453: return $currentstring;
454: }
455:
456: # accessrule
457: sub start_accessrule {
458: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
459: my $currentstring = '';
460: my $eff=&Apache::lonxml::get_param
461: ('effect',$parstack,$safeeval,undef,1);
462: my $realm=&Apache::lonxml::get_param
463: ('realm',$parstack,$safeeval,undef,1);
464: my $role=&Apache::lonxml::get_param
465: ('role',$parstack,$safeeval,undef,1);
466: $realm=~s/\s+//g;
467: $realm=~s/\//\_/g;
468: $realm=~s/^\_//;
469: $realm=~s/\W/\;/g;
470: $role=~s/\s+//g;
471: $role=~s/\//\_/g;
472: $role=~s/\W/\;/g;
473: if ($target eq 'web') {
474: my $args='';
475: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
476: if ($args eq '') {
477: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
478: } else {
479: $currentstring = $token->[4];
480: }
481: }
482: if ($target eq 'meta') {
483: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
484: }
485: return $currentstring;
486: }
487:
488: sub end_accessrule {
489: my ($target,$token,$tagstack,$parstack,$parser) = @_;
490: my $currentstring = '';
491: if ($target eq 'web') {
492: my $args='';
493: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
494: if ($args ne '') {
495: $currentstring = $token->[4];
496: }
497: }
498: return $currentstring;
499: }
500:
501: #-- <body> tag (end tag required)
502: sub start_body {
503: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
504: my $currentstring = '';
505:
506: if ($target eq 'web') {
507: if ($Apache::lonhomework::parsing_a_problem) {
508: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
509: return '';
510: }
511: if (!$Apache::lonxml::registered &&
512: $env{'request.state'} eq 'published') {
513: $currentstring.='<head>'.
514: &Apache::lonmenu::registerurl(undef,$target).'</head>';
515: }
516: # Accessibility
517: if ($env{'browser.imagesuppress'} eq 'on') {
518: delete($token->[2]->{'background'});
519: }
520: if ($env{'browser.fontenhance'} eq 'on') {
521: my $style='';
522: foreach my $key (keys(%{$token->[2]})) {
523: if ($key =~ /^style$/i) {
524: $style.=$token->[2]->{$key}.';';
525: delete($token->[2]->{$key});
526: }
527: }
528: $token->[2]->{'style'}=$style.'; font-size: x-large;';
529: }
530: if ($env{'browser.blackwhite'} eq 'on') {
531: delete($token->[2]->{'font'});
532: delete($token->[2]->{'link'});
533: delete($token->[2]->{'alink'});
534: delete($token->[2]->{'vlink'});
535: delete($token->[2]->{'bgcolor'});
536: delete($token->[2]->{'background'});
537: }
538: # Overload loads
539: my $onLoad='';
540: foreach my $key (keys(%{$token->[2]})) {
541: if ($key =~ /^onload$/i) {
542: $onLoad.=$token->[2]->{$key}.';';
543: delete($token->[2]->{$key});
544: }
545: }
546: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
547: my $onUnload='';
548: foreach my $key (keys(%{$token->[2]})) {
549: if ($key =~ /^onunload$/i) {
550: $onUnload.=$token->[2]->{$key}.';';
551: delete($token->[2]->{$key});
552: }
553: }
554: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
555: ';'.$onUnload;
556:
557: $currentstring .= '<'.$token->[1];
558: foreach (keys %{$token->[2]}) {
559: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
560: }
561: $currentstring.='>';
562: &Apache::lontexconvert::jsMath_reset();
563: if ($env{'environment.texengine'} eq 'jsMath') {
564: $currentstring.=&Apache::lontexconvert::jsMath_header();
565: }
566: if ($env{'request.state'} ne 'published') {
567: if ($env{'environment.remote'} eq 'off') {
568: $currentstring.=
569: &Apache::lonmenu::constspaceform().
570: &Apache::lonmenu::menubuttons(1,'web',1);
571: }
572: $currentstring.=(<<EDITBUTTON);
573: <form method="post">
574: <input type="submit" name="editmode" accesskey="e" value="Edit" />
575: </form>
576: EDITBUTTON
577: } else {
578: $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
579: }
580: $currentstring.=&Apache::lonxml::message_location();
581: } elsif ($target eq 'tex') {
582: $currentstring = '\begin{document}';
583: }
584: return $currentstring;
585: }
586:
587: sub end_body {
588: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
589: my $currentstring = &end_p(); # Close off unclosed <p>
590: if ($target eq 'web') {
591: $currentstring .= &Apache::lonxml::xmlend($target,$parser);
592: } elsif ($target eq 'tex') {
593: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
594: }
595: return $currentstring;
596: }
597:
598: #-- <center> tag (end tag required)
599: sub start_center {
600: my ($target,$token) = @_;
601: my $currentstring = &end_p(); # Close off any prior para.
602: if ($target eq 'web') {
603: $currentstring .= $token->[4];
604: } elsif ($target eq 'tex') {
605: $currentstring .= '\begin{center}';
606: }
607: return $currentstring;
608: }
609:
610: sub end_center {
611: my ($target,$token) = @_;
612: my $currentstring = '';
613: if ($target eq 'web') {
614: $currentstring = $token->[2];
615: } elsif ($target eq 'tex') {
616: $currentstring = '\end{center}';
617: }
618: return $currentstring;
619: }
620:
621: #-- <b> tag (end tag required)
622: # NOTE: In TeX mode disables internal <p>
623: sub start_b {
624: my ($target,$token) = @_;
625: my $currentstring = '';
626: if ($target eq 'web') {
627: $currentstring = $token->[4];
628: } elsif ($target eq 'tex') {
629: &disable_para();
630: $currentstring .= '\textbf{';
631: }
632: return $currentstring;
633: }
634:
635: sub end_b {
636: my ($target,$token) = @_;
637: my $currentstring = '';
638: if ($target eq 'web') {
639: $currentstring = $token->[2];
640: } elsif ($target eq 'tex') {
641: &enable_para();
642: $currentstring = '}';
643: }
644: return $currentstring;
645: }
646:
647: #-- <strong> tag (end tag required)
648: # NOTE: in TeX mode disables internal <p>
649: sub start_strong {
650: my ($target,$token) = @_;
651: my $currentstring = '';
652: if ($target eq 'web') {
653: $currentstring = $token->[4];
654: } elsif ($target eq 'tex') {
655: &disable_para();
656: $currentstring = '\textbf{';
657: }
658: return $currentstring;
659: }
660:
661: sub end_strong {
662: my ($target,$token) = @_;
663: my $currentstring = '';
664: if ($target eq 'web') {
665: $currentstring = $token->[2];
666: } elsif ($target eq 'tex') {
667: &enable_para();
668: $currentstring = '}';
669: }
670: return $currentstring;
671: }
672:
673: #-- <h1> tag (end tag required)
674: sub start_h1 {
675: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
676: my $currentstring = &end_p(); # Close off any prior para.
677: if ($target eq 'web') {
678: $currentstring .= $token->[4];
679: } elsif ($target eq 'tex') {
680: my $pre;
681: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
682: if ($align eq 'center') {
683: $pre='\begin{center}';
684: } elsif ($align eq 'left') {
685: $pre='\rlap{';
686: } elsif ($align eq 'right') {
687: $pre=' \hfill \llap{';
688: }
689: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
690: if (not defined $TeXsize) {$TeXsize="large";}
691: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
692: } elsif ($target eq 'meta') {
693: $currentstring.='<subject>';
694: &start_output($target);
695: }
696: return $currentstring;
697: }
698:
699: sub end_h1 {
700: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
701: my $currentstring = '';
702: if ($target eq 'web') {
703: $currentstring .= $token->[2];
704: } elsif ($target eq 'tex') {
705: my $post='\vskip 0 mm ';
706: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
707: if ($align eq 'center') {
708: $post='\end{center}';
709: } elsif ($align eq 'left') {
710: $post='} \hfill'.'\vskip 0 mm ';
711: } elsif ($align eq 'right') {
712: $post='}'.'\vskip 0 mm ';
713: }
714: $currentstring .= '}}'.$post;
715: } elsif ($target eq 'meta') {
716: &end_output($target);
717: $currentstring='</subject>';
718: }
719: return $currentstring;
720: }
721:
722: #-- <h2> tag
723: sub start_h2 {
724: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
725: my $currentstring = &end_p(); # Close off any prior para.
726: if ($target eq 'web') {
727: $currentstring .= $token->[4];
728: } elsif ($target eq 'tex') {
729: my $pre;
730: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
731: if ($align eq 'center') {
732: $pre='\begin{center}';
733: } elsif ($align eq 'left') {
734: $pre='\rlap{';
735: } elsif ($align eq 'right') {
736: $pre=' \hfill \llap{';
737: }
738: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
739: if (not defined $TeXsize) {$TeXsize="large";}
740: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
741: }
742: return $currentstring;
743: }
744:
745: sub end_h2 {
746: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
747: my $currentstring = '';
748: if ($target eq 'web') {
749: $currentstring .= $token->[2];
750: } elsif ($target eq 'tex') {
751: my $post='\vskip 0 mm ';
752: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
753: if ($align eq 'center') {
754: $post='\end{center}';
755: } elsif ($align eq 'left') {
756: $post='} \hfill'.'\vskip 0 mm ';
757: } elsif ($align eq 'right') {
758: $post='}'.'\vskip 0 mm ';
759: }
760: $currentstring .= '}}'.$post;
761: }
762: return $currentstring;
763: }
764:
765: #-- <h3> tag
766: sub start_h3 {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
768: my $currentstring = &end_p(); # Close off any prior para.
769: if ($target eq 'web') {
770: $currentstring .= $token->[4];
771: } elsif ($target eq 'tex') {
772: my $pre;
773: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
774: if ($align eq 'center') {
775: $pre='\begin{center}';
776: } elsif ($align eq 'left') {
777: $pre='\rlap{';
778: } elsif ($align eq 'right') {
779: $pre=' \hfill \llap{';
780: }
781: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
782: if (not defined $TeXsize) {$TeXsize="large";}
783: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
784: }
785: return $currentstring;
786: }
787:
788: sub end_h3 {
789: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
790: my $currentstring = '';
791: if ($target eq 'web') {
792: $currentstring .= $token->[2];
793: } elsif ($target eq 'tex') {
794: my $post='\vskip 0 mm ';
795: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
796: if ($align eq 'center') {
797: $post='\end{center}';
798: } elsif ($align eq 'left') {
799: $post='} \hfill'.'\vskip 0 mm ';
800: } elsif ($align eq 'right') {
801: $post='}'.'\vskip 0 mm ';
802: }
803: $currentstring .= '}}'.$post;
804: }
805: return $currentstring;
806: }
807:
808: #-- <h4> tag
809: sub start_h4 {
810: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
811: my $currentstring = &end_p(); # Close off any prior para.
812: if ($target eq 'web') {
813: $currentstring .= $token->[4];
814: } elsif ($target eq 'tex') {
815: my $pre;
816: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
817: if ($align eq 'center') {
818: $pre='\begin{center}';
819: } elsif ($align eq 'left') {
820: $pre='\rlap{';
821: } elsif ($align eq 'right') {
822: $pre=' \hfill \llap{';
823: }
824: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
825: if (not defined $TeXsize) {$TeXsize="large";}
826: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
827: }
828: return $currentstring;
829: }
830:
831: sub end_h4 {
832: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
833: my $currentstring = '';
834: if ($target eq 'web') {
835: $currentstring .= $token->[2];
836: } elsif ($target eq 'tex') {
837: my $post='\vskip 0 mm ';
838: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
839: if ($align eq 'center') {
840: $post='\end{center}';
841: } elsif ($align eq 'left') {
842: $post='} \hfill'.'\vskip 0 mm ';
843: } elsif ($align eq 'right') {
844: $post='}'.'\vskip 0 mm ';
845: }
846: $currentstring .= '}}'.$post;
847: }
848: return $currentstring;
849: }
850:
851: #-- <h5> tag
852: sub start_h5 {
853: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
854: my $currentstring = &end_p(); # Close off any prior paras.
855: if ($target eq 'web') {
856: $currentstring .= $token->[4];
857: } elsif ($target eq 'tex') {
858: my $pre;
859: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
860: if ($align eq 'center') {
861: $pre='\begin{center}';
862: } elsif ($align eq 'left') {
863: $pre='\rlap{';
864: } elsif ($align eq 'right') {
865: $pre=' \hfill \llap{';
866: }
867: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
868: if (not defined $TeXsize) {$TeXsize="large";}
869: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
870: }
871: return $currentstring;
872: }
873:
874: sub end_h5 {
875: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
876: my $currentstring = '';
877: if ($target eq 'web') {
878: $currentstring .= $token->[2];
879: } elsif ($target eq 'tex') {
880: my $post='\vskip 0 mm ';
881: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
882: if ($align eq 'center') {
883: $post='\end{center}';
884: } elsif ($align eq 'left') {
885: $post='} \hfill'.'\vskip 0 mm ';
886: } elsif ($align eq 'right') {
887: $post='}'.'\vskip 0 mm ';
888: }
889: $currentstring .= '}}'.$post;
890: }
891: return $currentstring;
892: }
893:
894: #-- <h6> tag
895: sub start_h6 {
896: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
897: my $currentstring = &end_p(); # Close off any prior paras.
898: if ($target eq 'web') {
899: $currentstring .= $token->[4];
900: } elsif ($target eq 'tex') {
901: my $pre;
902: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
903: if ($align eq 'center') {
904: $pre='\begin{center}';
905: } elsif ($align eq 'left') {
906: $pre='\rlap{';
907: } elsif ($align eq 'right') {
908: $pre=' \hfill \llap{';
909: }
910: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
911: if (not defined $TeXsize) {$TeXsize="large";}
912: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
913: }
914: return $currentstring;
915: }
916:
917: sub end_h6 {
918: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
919: my $currentstring = '';
920: if ($target eq 'web') {
921: $currentstring .= $token->[2];
922: } elsif ($target eq 'tex') {
923: my $post='\vskip 0 mm ';
924: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
925: if ($align eq 'center') {
926: $post='\end{center}';
927: } elsif ($align eq 'left') {
928: $post='} \hfill'.'\vskip 0 mm ';
929: } elsif ($align eq 'right') {
930: $post='}'.'\vskip 0 mm ';
931: }
932: $currentstring .= '}}'.$post;
933: }
934: return $currentstring;
935: }
936:
937: #--- <cite> tag (end tag required)
938: sub start_cite {
939: my ($target,$token) = @_;
940: my $currentstring = '';
941: if ($target eq 'web') {
942: $currentstring .= $token->[4];
943: } elsif ($target eq 'tex') {
944: $currentstring .= '\textit{';
945: }
946: return $currentstring;
947: }
948:
949: sub end_cite {
950: my ($target,$token) = @_;
951: my $currentstring = '';
952: if ($target eq 'web') {
953: $currentstring .= $token->[2];
954: } elsif ($target eq 'tex') {
955: $currentstring .= '}';
956: }
957: return $currentstring;
958: }
959:
960: #-- <i> tag (end tag required)
961: sub start_i {
962: my ($target,$token) = @_;
963: my $currentstring = '';
964: if ($target eq 'web') {
965: $currentstring .= $token->[4];
966: } elsif ($target eq 'tex') {
967: $currentstring .= '\textit{';
968: }
969: return $currentstring;
970: }
971:
972: sub end_i {
973: my ($target,$token) = @_;
974: my $currentstring = '';
975: if ($target eq 'web') {
976: $currentstring .= $token->[2];
977: } elsif ($target eq 'tex') {
978: $currentstring .= '}';
979: }
980: return $currentstring;
981: }
982:
983: #-- <address> tag (end tag required)
984: sub start_address {
985: my ($target,$token) = @_;
986: my $currentstring = '';
987: if ($target eq 'web') {
988: $currentstring .= $token->[4];
989: } elsif ($target eq 'tex') {
990: $currentstring .= '\textit{';
991: }
992: return $currentstring;
993: }
994:
995: sub end_address {
996: my ($target,$token) = @_;
997: my $currentstring = '';
998: if ($target eq 'web') {
999: $currentstring .= $token->[2];
1000: } elsif ($target eq 'tex') {
1001: $currentstring .= '}';
1002: }
1003: return $currentstring;
1004: }
1005:
1006: #-- <dfn> tag (end tag required)
1007: sub start_dfn {
1008: my ($target,$token) = @_;
1009: my $currentstring = '';
1010: if ($target eq 'web') {
1011: $currentstring .= $token->[4];
1012: } elsif ($target eq 'tex') {
1013: $currentstring .= '\textit{';
1014: }
1015: return $currentstring;
1016: }
1017:
1018: sub end_dfn {
1019: my ($target,$token) = @_;
1020: my $currentstring = '';
1021: if ($target eq 'web') {
1022: $currentstring .= $token->[2];
1023: } elsif ($target eq 'tex') {
1024: $currentstring .= '}';
1025: }
1026: return $currentstring;
1027: }
1028:
1029: #-- <tt> tag (end tag required)
1030: sub start_tt {
1031: my ($target,$token) = @_;
1032: my $currentstring = '';
1033: if ($target eq 'web') {
1034: $currentstring .= $token->[4];
1035: } elsif ($target eq 'tex') {
1036: $currentstring .= '\texttt{';
1037: }
1038: return $currentstring;
1039: }
1040:
1041: sub end_tt {
1042: my ($target,$token) = @_;
1043: my $currentstring = '';
1044: if ($target eq 'web') {
1045: $currentstring .= $token->[2];
1046: } elsif ($target eq 'tex') {
1047: $currentstring .= '}';
1048: }
1049: return $currentstring;
1050: }
1051:
1052: #-- <kbd> tag (end tag required)
1053: sub start_kbd {
1054: my ($target,$token) = @_;
1055: my $currentstring = '';
1056: if ($target eq 'web') {
1057: $currentstring .= $token->[4];
1058: } elsif ($target eq 'tex') {
1059: $currentstring .= '\texttt{';
1060: }
1061: return $currentstring;
1062: }
1063:
1064: sub end_kbd {
1065: my ($target,$token) = @_;
1066: my $currentstring = '';
1067: if ($target eq 'web') {
1068: $currentstring .= $token->[2];
1069: } elsif ($target eq 'tex') {
1070: $currentstring .= '}';
1071: }
1072: return $currentstring;
1073: }
1074:
1075: #-- <code> tag (end tag required)
1076: sub start_code {
1077: my ($target,$token) = @_;
1078: my $currentstring = '';
1079: if ($target eq 'web') {
1080: $currentstring .= $token->[4];
1081: } elsif ($target eq 'tex') {
1082: $currentstring .= '\texttt{';
1083: }
1084: return $currentstring;
1085: }
1086:
1087: sub end_code {
1088: my ($target,$token) = @_;
1089: my $currentstring = '';
1090: if ($target eq 'web') {
1091: $currentstring .= $token->[2];
1092: } elsif ($target eq 'tex') {
1093: $currentstring .= '}';
1094: }
1095: return $currentstring;
1096: }
1097:
1098: #-- <em> tag (end tag required)
1099: sub start_em {
1100: my ($target,$token) = @_;
1101: my $currentstring = '';
1102: if ($target eq 'web') {
1103: $currentstring .= $token->[4];
1104: } elsif ($target eq 'tex') {
1105: $currentstring .= '\emph{';
1106: }
1107: return $currentstring;
1108: }
1109:
1110: sub end_em {
1111: my ($target,$token) = @_;
1112: my $currentstring = '';
1113: if ($target eq 'web') {
1114: $currentstring .= $token->[2];
1115: } elsif ($target eq 'tex') {
1116: $currentstring .= '}';
1117: }
1118: return $currentstring;
1119: }
1120:
1121: #-- <q> tag (end tag required)
1122: sub start_q {
1123: my ($target,$token) = @_;
1124: my $currentstring = '';
1125: if ($target eq 'web') {
1126: $currentstring .= $token->[4];
1127: } elsif ($target eq 'tex') {
1128: $currentstring .= '\emph{';
1129: }
1130: return $currentstring;
1131: }
1132:
1133: sub end_q {
1134: my ($target,$token) = @_;
1135: my $currentstring = '';
1136: if ($target eq 'web') {
1137: $currentstring .= $token->[2];
1138: } elsif ($target eq 'tex') {
1139: $currentstring .= '}';
1140: }
1141: return $currentstring;
1142: }
1143:
1144: # <p> is a bit strange since it does not require a closing </p>
1145: # However in latex, we must often output closing stuff to end
1146: # environments and {}'s etc. Therefore we do all the work
1147: # of figuring out the ending strings in the start tag processing,
1148: # and provide a mechanism to output the stop text external
1149: # to tag processing.
1150: #
1151: {
1152:
1153: my $closing_string = ''; # String required to close <p>
1154:
1155: # Some tags are <p> fragile meaning that <p> inside of them
1156: # does not work within TeX mode. This is managed via the
1157: # counter below:
1158: #
1159:
1160: my $para_disabled = 0;
1161:
1162: sub disable_para {
1163: $para_disabled++;
1164: }
1165: sub enable_para {
1166: $para_disabled--;
1167: }
1168:
1169:
1170: #-- <p> tag (end tag optional)
1171: #optional attribute - align="center|left|right"
1172: sub start_p {
1173: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1174: my $currentstring = '';
1175: if ($target eq 'web') {
1176: $currentstring .= &end_p(); # close off prior para if in progress.
1177: $currentstring .= $token->[4];
1178: if (! ($currentstring =~ /\//)) {
1179: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1180: }
1181: } elsif ($target eq 'tex' && !$para_disabled) {
1182: $currentstring .= &end_p(); # close off prior para if in progress.
1183: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1184: if ($align eq 'center') {
1185: $currentstring .='\begin{center}\par';
1186: $closing_string = '\end{center}';
1187: } elsif ($align eq 'right') {
1188: $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1189: $closing_string= '}}';
1190: } elsif ($align eq 'left') {
1191: $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
1192: $closing_string = '}\hfill}';
1193: } else {
1194: $currentstring.='\par ';
1195: $closing_string = '\strut\\\\\strut ';
1196: }
1197:
1198: }
1199: return $currentstring;
1200: }
1201: #
1202: # End paragraph processing just requires that we output the
1203: # closing string that was saved and blank it.
1204: sub end_p {
1205: # Note only 'tex' mode uses disable_para and enable_para
1206: # so we don't need to know the target in the check below:
1207:
1208: if (!$para_disabled) {
1209: my $current_string = $closing_string;
1210: $closing_string = ''; # Not in a para anymore.
1211: return $current_string;
1212: } else {
1213: return '';
1214: }
1215:
1216: }
1217: }
1218: #-- <br> tag (end tag forbidden)
1219: sub start_br {
1220: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1221: my $currentstring = '';
1222: if ($target eq 'web') {
1223: $currentstring .= $token->[4];
1224: } elsif ($target eq 'tex') {
1225: my @tempo=@$tagstack;
1226: my $signal=0;
1227: # Not going to factor this to is_inside_of since that would require
1228: # multiple stack traversals.
1229: #
1230: for (my $i=$#tempo;$i>=0;$i--) {
1231: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1232: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1233: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1234: $signal=1;
1235: last;
1236: }
1237: }
1238: if ($signal) {
1239: $currentstring .= ' \vskip 0 mm ';
1240: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1241: $currentstring .= '\strut \\\\ \strut ';
1242: }
1243: }
1244: return $currentstring;
1245: }
1246:
1247: sub end_br {
1248: my ($target,$token) = @_;
1249: my $currentstring = '';
1250: if ($target eq 'web') {
1251: $currentstring .= $token->[2];
1252: }
1253: return $currentstring;
1254: }
1255:
1256: #-- <big> tag (end tag required)
1257: sub start_big {
1258: my ($target,$token) = @_;
1259: my $currentstring = '';
1260: if ($target eq 'web') {
1261: $currentstring .= $token->[4];
1262: } elsif ($target eq 'tex') {
1263: $currentstring .= '{\large ';
1264: }
1265: return $currentstring;
1266: }
1267:
1268: sub end_big {
1269: my ($target,$token) = @_;
1270: my $currentstring = '';
1271: if ($target eq 'web') {
1272: $currentstring .= $token->[2];
1273: } elsif ($target eq 'tex') {
1274: $currentstring .= '}';
1275: }
1276: return $currentstring;
1277: }
1278:
1279: #-- <small> tag (end tag required)
1280: sub start_small {
1281: my ($target,$token) = @_;
1282: my $currentstring = '';
1283: if ($target eq 'web') {
1284: $currentstring .= $token->[4];
1285: } elsif ($target eq 'tex') {
1286: $currentstring .= '{\footnotesize ';
1287: }
1288: return $currentstring;
1289: }
1290:
1291: sub end_small {
1292: my ($target,$token) = @_;
1293: my $currentstring = '';
1294: if ($target eq 'web') {
1295: $currentstring .= $token->[2];
1296: } elsif ($target eq 'tex') {
1297: $currentstring .= '}';
1298: }
1299: return $currentstring;
1300: }
1301:
1302: #-- <basefont> tag (end tag forbidden)
1303: sub start_basefont {
1304: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1305: my $currentstring = '';
1306: if ($target eq 'web') {
1307: $currentstring = $token->[4];
1308: } elsif ($target eq 'tex') {
1309: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1310: if (defined $basesize) {
1311: $currentstring = '{\\'.$basesize.' ';
1312: }
1313: }
1314: return $currentstring;
1315: }
1316:
1317: sub end_basefont {
1318: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1319: my $currentstring = '';
1320: if ($target eq 'web') {
1321: $currentstring = $token->[4];
1322: } elsif ($target eq 'tex') {
1323: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1324: if (defined $basesize) {
1325: $currentstring = '}';
1326: }
1327: }
1328: return $currentstring;
1329: }
1330:
1331: #-- <font> tag (end tag required)
1332: sub start_font {
1333: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1334: my $currentstring = '';
1335: if ($target eq 'web') {
1336: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1337: if ($face!~/symbol/i) {
1338: if (($env{'browser.fontenhance'} eq 'on') ||
1339: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1340: }
1341: $currentstring = $token->[4];
1342: } elsif ($target eq 'tex') {
1343: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1344: if (defined $fontsize) {
1345: $currentstring = '{\\'.$fontsize.' ';
1346: }
1347: }
1348: return $currentstring;
1349: }
1350:
1351: sub end_font {
1352: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1353: my $currentstring = '';
1354: if ($target eq 'web') {
1355: $currentstring = $token->[2];
1356: } elsif ($target eq 'tex') {
1357: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1358: if (defined $fontsize) {
1359: $currentstring = '}';
1360: }
1361: }
1362: return $currentstring;
1363: }
1364:
1365: #-- <strike> tag (end tag required)
1366: sub start_strike {
1367: my ($target,$token) = @_;
1368: my $currentstring = '';
1369: if ($target eq 'web') {
1370: $currentstring .= $token->[4];
1371: } elsif ($target eq 'tex') {
1372: &Apache::lonxml::startredirection();
1373: }
1374: return $currentstring;
1375: }
1376:
1377: sub end_strike {
1378: my ($target,$token) = @_;
1379: my $currentstring = '';
1380: if ($target eq 'web') {
1381: $currentstring .= $token->[2];
1382: } elsif ($target eq 'tex') {
1383: $currentstring=&Apache::lonxml::endredirection();
1384: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1385: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1386: $currentstring=~s/(\S)\s*$/$1\}/;
1387: }
1388: return $currentstring;
1389: }
1390:
1391: #-- <s> tag (end tag required)
1392: sub start_s {
1393: my ($target,$token) = @_;
1394: my $currentstring = '';
1395: if ($target eq 'web') {
1396: $currentstring .= $token->[4];
1397: } elsif ($target eq 'tex') {
1398: &Apache::lonxml::startredirection();
1399: }
1400: return $currentstring;
1401: }
1402:
1403: sub end_s {
1404: my ($target,$token) = @_;
1405: my $currentstring = '';
1406: if ($target eq 'web') {
1407: $currentstring .= $token->[2];
1408: } elsif ($target eq 'tex') {
1409: $currentstring=&Apache::lonxml::endredirection();
1410: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1411: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1412: $currentstring=~s/(\S)\s*$/$1\}/;
1413: }
1414: return $currentstring;
1415: }
1416:
1417: #-- <sub> tag (end tag required)
1418: sub start_sub {
1419: my ($target,$token) = @_;
1420: my $currentstring = '';
1421: if ($target eq 'web') {
1422: $currentstring .= $token->[4];
1423: } elsif ($target eq 'tex') {
1424: $currentstring .= '\ensuremath{_{';
1425: }
1426: return $currentstring;
1427: }
1428:
1429: sub end_sub {
1430: my ($target,$token) = @_;
1431: my $currentstring = '';
1432: if ($target eq 'web') {
1433: $currentstring .= $token->[2];
1434: } elsif ($target eq 'tex') {
1435: $currentstring .= '}}';
1436: }
1437: return $currentstring;
1438: }
1439:
1440: #-- <sup> tag (end tag required)
1441: sub start_sup {
1442: my ($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 $currentstring;
1450: }
1451:
1452: sub end_sup {
1453: my ($target,$token) = @_;
1454: my $currentstring = '';
1455: if ($target eq 'web') {
1456: $currentstring .= $token->[2];
1457: } elsif ($target eq 'tex') {
1458: $currentstring .= '}}';
1459: }
1460: return $currentstring;
1461: }
1462:
1463: #-- <hr> tag (end tag forbidden)
1464: sub start_hr {
1465: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1466: my $currentstring = &end_p(); # End enclosing para.
1467: if ($target eq 'web') {
1468: $currentstring .= $token->[4];
1469: } elsif ($target eq 'tex') {
1470: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1471: if (defined $LaTeXwidth) {
1472: if ($LaTeXwidth=~/^%/) {
1473: substr($LaTeXwidth,0,1)='';
1474: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1475: }
1476: } else {
1477: $LaTeXwidth ='0.9\textwidth';
1478: }
1479: my ($pre,$post);
1480: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1481: if (($align eq 'center') || (not defined $align)) {
1482: $pre=''; $post='';
1483: } elsif ($align eq 'left') {
1484: $pre='\rlap{'; $post='} \hfill';
1485: } elsif ($align eq 'right') {
1486: $pre=' \hfill \llap{'; $post='}';
1487: }
1488: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1489: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1490: }
1491: return $currentstring;
1492: }
1493:
1494: sub end_hr {
1495: my ($target,$token) = @_;
1496: my $currentstring = '';
1497: if ($target eq 'web') {
1498: $currentstring .= $token->[2];
1499: }
1500: return $currentstring;
1501: }
1502:
1503: #-- <div> tag (end tag required)
1504: {
1505:
1506: # Since div can be nested, the stack below is used
1507: # in 'tex' mode to store the ending strings
1508: # for the div stack.
1509:
1510: my @div_end_stack;
1511:
1512: sub start_div {
1513: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1514: my $currentstring = &end_p(); # Close enclosing para.
1515: if ($target eq 'web') {
1516: $currentstring .= $token->[4];
1517: }
1518: if ($target eq 'tex') {
1519: # 4 possible alignments: left, right, center, and -missing-.
1520:
1521: my $endstring = '';
1522:
1523: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1524: $safeeval, undef, 1));
1525: if ($align eq 'center') {
1526: $currentstring .= '\begin{center}';
1527: $endstring = '\end{center}';
1528: }
1529: elsif ($align eq 'right') {
1530: $currentstring .= '\begin{flushright}';
1531: $endstring .= '\end{flushright}';
1532: } elsif ($align eq 'left') {
1533: $currentstring .= '\begin{flushleft}';
1534: $endstring = '\end{flushleft}';
1535: } else {
1536:
1537: }
1538: $currentstring .= "\n"; # For human readability.
1539: $endstring = "\n$endstring\n"; # For human readability
1540: push(@div_end_stack, $endstring);
1541: }
1542: return $currentstring;
1543: }
1544:
1545: sub end_div {
1546: my ($target,$token) = @_;
1547: my $currentstring = '';
1548: if ($target eq 'web') {
1549: $currentstring .= $token->[2];
1550: }
1551: if ($target eq 'tex') {
1552: my $endstring = pop @div_end_stack;
1553: $currentstring .= $endstring;
1554: }
1555: return $currentstring;
1556: }
1557: }
1558:
1559: #-- <a> tag (end tag required)
1560: sub start_a {
1561: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1562: my $currentstring = '';
1563: if ($target eq 'web') {
1564: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1565: undef,1);
1566: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1567: } elsif ($target eq 'tex') {
1568: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1569: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1570: if ($a=~/\S/) {
1571: $a=~s/([^\\])%/$1\\\%/g;
1572: $currentstring .= '\ref{URI: '.$a.'}';
1573: } elsif ($b=~/\S/) {
1574: $currentstring .= '\ref{Anchor: '.$b.'}';
1575: } else {
1576: $currentstring.='';
1577: }
1578: }
1579: return $currentstring;
1580: }
1581:
1582: sub end_a {
1583: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1584: my $currentstring = '';
1585: if ($target eq 'web') {
1586: $currentstring .= $token->[2];
1587: }
1588: return $currentstring;
1589: }
1590:
1591: #-- <li> tag (end tag optional)
1592: sub start_li {
1593: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1594: my $currentstring = '';
1595: if ($target eq 'web') {
1596: $currentstring = $token->[4];
1597: } elsif ($target eq 'tex') {
1598: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1599: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1600: #FIXME need to support types i and I
1601: if ($type=~/disc/) {
1602: $currentstring .= ' \item[$\bullet$] ';
1603: } elsif ($type=~/circle/) {
1604: $currentstring .= ' \item[$\circ$] ';
1605: } elsif ($type=~/square/) {
1606: $currentstring .= ' \item[$\diamond$] ';
1607: } elsif ($type eq '1') {
1608: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1609: } elsif ($type eq 'A') {
1610: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1611: } elsif ($type eq 'a') {
1612: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1613: } elsif ($value ne '') {
1614: $currentstring .= ' \item['.$value.'] ';
1615: } else {
1616: $currentstring .= ' \item ';
1617: }
1618: $Apache::londefdef::list_index++;
1619: }
1620: return $currentstring;
1621: }
1622:
1623: sub end_li {
1624: my ($target,$token) = @_;
1625: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1626: if ($target eq 'web') {
1627: $currentstring .= $token->[2];
1628: }
1629: return $currentstring;
1630: }
1631:
1632: #-- <u> tag (end tag required)
1633: sub start_u {
1634: my ($target,$token) = @_;
1635: my $currentstring = '';
1636: if ($target eq 'web') {
1637: $currentstring .= $token->[4];
1638: } elsif ($target eq 'tex') {
1639: &Apache::lonxml::startredirection();
1640: }
1641: return $currentstring;
1642: }
1643:
1644: sub end_u {
1645: my ($target,$token) = @_;
1646: my $currentstring = '';
1647: if ($target eq 'web') {
1648: $currentstring .= $token->[2];
1649: } elsif ($target eq 'tex') {
1650: $currentstring=&Apache::lonxml::endredirection();
1651: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1652: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1653: $currentstring=~s/(\S)\s*$/$1\}/;
1654: }
1655: return $currentstring;
1656: }
1657:
1658: #-- <ul> tag (end tag required)
1659: sub start_ul {
1660: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1661: my $currentstring = &end_p(); # Close off enclosing list.
1662: if ($target eq 'web') {
1663: $currentstring .= $token->[4];
1664: } elsif ($target eq 'tex') {
1665: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1666: $Apache::londefdef::list_index=0;
1667: if ($TeXtype eq 'disc') {
1668: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1669: '\renewcommand{\labelitemii}{$\bullet$}'.
1670: '\renewcommand{\labelitemiii}{$\bullet$}'.
1671: '\renewcommand{\labelitemiv}{$\bullet$}';
1672: } elsif ($TeXtype eq 'circle') {
1673: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1674: '\renewcommand{\labelitemii}{$\circ$}'.
1675: '\renewcommand{\labelitemiii}{$\circ$}'.
1676: '\renewcommand{\labelitemiv}{$\circ$}';
1677: } elsif ($TeXtype eq 'square') {
1678: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1679: '\renewcommand{\labelitemii}{$\diamond$}'.
1680: '\renewcommand{\labelitemiii}{$\diamond$}'.
1681: '\renewcommand{\labelitemiv}{$\diamond$}';
1682: }
1683: $currentstring .= '\strut \begin{itemize}';
1684: }
1685: return $currentstring;
1686: }
1687:
1688: sub end_ul {
1689: my ($target,$token) = @_;
1690: my $currentstring = '';
1691: if ($target eq 'web') {
1692: $currentstring = $token->[2];
1693: } elsif ($target eq 'tex') {
1694: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1695: '\renewcommand{\labelitemii}{$\bullet$}'.
1696: '\renewcommand{\labelitemiii}{$\bullet$}'.
1697: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1698: }
1699: return $currentstring;
1700: }
1701:
1702: #-- <menu> tag (end tag required)
1703: sub start_menu {
1704: my ($target,$token) = @_;
1705: my $currentstring = '';
1706: if ($target eq 'web') {
1707: $currentstring = $token->[4];
1708: } elsif ($target eq 'tex') {
1709: $currentstring = " \\begin{itemize} ";
1710: }
1711: return $currentstring;
1712: }
1713:
1714: sub end_menu {
1715: my ($target,$token) = @_;
1716: my $currentstring = '';
1717: if ($target eq 'web') {
1718: $currentstring = $token->[2];
1719: } elsif ($target eq 'tex') {
1720: $currentstring = " \\end{itemize}";
1721: }
1722: return $currentstring;
1723: }
1724:
1725: #-- <dir> tag (end tag required)
1726: sub start_dir {
1727: my ($target,$token) = @_;
1728: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1729: if ($target eq 'web') {
1730: $currentstring .= $token->[4];
1731: } elsif ($target eq 'tex') {
1732: $currentstring .= " \\begin{itemize} ";
1733: }
1734: return $currentstring;
1735: }
1736:
1737: sub end_dir {
1738: my ($target,$token) = @_;
1739: my $currentstring = '';
1740: if ($target eq 'web') {
1741: $currentstring = $token->[2];
1742: } elsif ($target eq 'tex') {
1743: $currentstring = " \\end{itemize}";
1744: }
1745: return $currentstring;
1746: }
1747:
1748: #-- <ol> tag (end tag required)
1749: sub start_ol {
1750: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1751: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1752: if ($target eq 'web') {
1753: $currentstring .= $token->[4];
1754: } elsif ($target eq 'tex') {
1755: $Apache::londefdef::list_index=0;
1756: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1757: if ($type eq '1') {
1758: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1759: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1760: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1761: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1762: } elsif ($type eq 'A') {
1763: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1764: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1765: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1766: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1767: } elsif ($type eq 'a') {
1768: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1769: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1770: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1771: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1772: } elsif ($type eq 'i') {
1773: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1774: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1775: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1776: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1777: } elsif ($type eq 'I') {
1778: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1779: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1780: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1781: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1782: }
1783: $currentstring .= '\strut \begin{enumerate}';
1784: }
1785: return $currentstring;
1786: }
1787:
1788: sub end_ol {
1789: my ($target,$token) = @_;
1790: my $currentstring = '';
1791: if ($target eq 'web') {
1792: $currentstring = $token->[2];
1793: } elsif ($target eq 'tex') {
1794: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1795: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1796: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1797: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1798: }
1799: return $currentstring;
1800: }
1801:
1802: #-- <dl> tag (end tag required)
1803: sub start_dl {
1804: my ($target,$token) = @_;
1805: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1806: if ($target eq 'web') {
1807: $currentstring .= $token->[4];
1808: } elsif ($target eq 'tex') {
1809: $currentstring .= '\begin{description}';
1810: $Apache::londefdef::DL++;
1811: push(@Apache::londefdef::description,[]);
1812: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1813: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1814: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1815: }
1816: return $currentstring;
1817: }
1818:
1819: sub end_dl {
1820: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1821: my $currentstring = '';
1822: if ($target eq 'web') {
1823: $currentstring = $token->[2];
1824: } elsif ($target eq 'tex') {
1825: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1826: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1827: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1828: $currentstring.=' '.$element.' ';
1829: }
1830: pop(@Apache::londefdef::description);
1831: $currentstring.='\end{description}';
1832: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1833: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1834: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1835: $Apache::londefdef::DL--;
1836: }
1837: return $currentstring;
1838: }
1839:
1840: #-- <dt> tag (end tag optional)
1841: sub start_dt {
1842: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1843: my $currentstring='';
1844: if ($target eq 'web') {
1845: $currentstring = $token->[4];
1846: } elsif ($target eq 'tex') {
1847: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1848: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1849: &Apache::lonxml::startredirection();
1850: $Apache::londefdef::DT[-1]++;
1851: $Apache::londefdef::seenDT[-1]=1;
1852: }
1853: return $currentstring;
1854: }
1855:
1856: sub end_dt {
1857: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1858: my $currentstring = '';
1859: if ($target eq 'web') {
1860: $currentstring = $token->[2];
1861: } elsif ($target eq 'tex') {
1862: if ($Apache::londefdef::DT[-1]) {
1863: my $data=&item_cleanup();
1864: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1865: $Apache::londefdef::DT[-1]--;
1866: }
1867: }
1868: return $currentstring;
1869: }
1870:
1871: sub item_cleanup {
1872: my $item=&Apache::lonxml::endredirection();
1873: $item=~s/\\begin{center}//g;
1874: $item=~s/\\end{center}//g;
1875: return $item;
1876: }
1877:
1878: #-- <dd> tag (end tag optional)
1879: sub start_dd {
1880: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1881: my $currentstring = '';
1882: if ($target eq 'web') {
1883: $currentstring = $token->[4];
1884: } elsif ($target eq 'tex') {
1885: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1886: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1887: if (!$Apache::londefdef::seenDT[-1]) {
1888: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1889: }
1890: push(@{$Apache::londefdef::description[-1]},'');
1891: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1892: $Apache::londefdef::DD[-1]++;
1893: &Apache::lonxml::startredirection();
1894: }
1895: return $currentstring;
1896: }
1897:
1898: sub end_dd {
1899: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1900: my $currentstring = '';
1901: if ($target eq 'web') {
1902: $currentstring = $token->[2];
1903: } elsif ($target eq 'tex') {
1904: $Apache::londefdef::description[-1]->[-1].=
1905: &Apache::lonxml::endredirection().' \vskip 0mm ';
1906: $Apache::londefdef::DD[-1]--;
1907: }
1908: return $currentstring;
1909: }
1910:
1911: #-- <table> tag (end tag required)
1912: # <table> also ends any prior <p> that is not closed.
1913: # but, unless I allow <p>'s to nest, that's the
1914: # only way I could think of to allow <p> in
1915: # <tr> <th> bodies
1916: #
1917: #list of supported attributes: border,width,TeXwidth
1918: sub start_table {
1919: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1920: my $textwidth = '';
1921: my $currentstring = &end_p();
1922: if ($target eq 'web') {
1923: $currentstring .= $token->[4];
1924: } elsif ($target eq 'tex') {
1925: my $aa = {};
1926: push @Apache::londefdef::table, $aa;
1927: $Apache::londefdef::table[-1]{'row_number'} = -1;
1928: #maximum table's width (default coincides with text line length)
1929: if ($#Apache::londefdef::table==0) {
1930: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1931: $textwidth=~/(\d+\.?\d*)/;
1932: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1933: } else {
1934: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1935: #the maximum width of nested table is determined by LATeX width of parent cell
1936: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1937: } else {
1938: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1939: $textwidth=$Apache::londefdef::table[-2]{'width'};
1940: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1941: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1942: }
1943: }
1944: }
1945:
1946: # width either comes forced from the TeXwidth or the width parameters.
1947: # in either case it can be a percentage or absolute width.
1948:
1949: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1950: if (not defined $TeXwidth) {
1951: $TeXwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);
1952:
1953: } else {
1954: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1955: }
1956: if ($TeXwidth=~/%/) {
1957: $Apache::londefdef::table[-1]{'percent'}=1;
1958: $TeXwidth=~/(\d+)/;
1959: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1960: } else {
1961: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1962: }
1963:
1964: #table's border
1965: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1966: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1967: unless (defined $border) { $border = 0; }
1968: if ($border) {
1969: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1970: $Apache::londefdef::table[-1]{'vinc'} = '&';
1971: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1972: } else {
1973: $Apache::londefdef::table[-1]{'hinc'} = '';
1974: $Apache::londefdef::table[-1]{'vinc'} = '&';
1975: $Apache::londefdef::table[-1]{'vvinc'} = '';
1976: }
1977: if ($#Apache::londefdef::table==0) {
1978: # Note that \newline seems to destroy the alignment envs.
1979: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1980: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1981: }
1982: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1983: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1984: $Apache::londefdef::table[-1]{'objectlen'}=[];
1985: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1986: $Apache::londefdef::table[-1]{'maxlen'}=[];
1987: $Apache::londefdef::table[-1]{'minlen'}=[];
1988: $Apache::londefdef::table[-1]{'content'}=[];
1989: $Apache::londefdef::table[-1]{'align'}=[];
1990: $currentstring.='\keephidden{NEW TABLE ENTRY}';
1991:
1992:
1993: }
1994: return $currentstring;
1995: }
1996:
1997: sub end_table {
1998: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1999: my $currentstring = '';
2000: if ($target eq 'web') {
2001: $currentstring = $token->[2];
2002: } elsif ($target eq 'tex') {
2003: my $inmemory = '';
2004: my $output = '';
2005: my $WARNING='';
2006: #width of columns from TeXwidth attributes
2007:
2008: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2009: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2010: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2011: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2012: }
2013: }
2014: }
2015: #free space and number of empty columns
2016: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2017: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2018: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2019: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2020: $empty_columns++;
2021: } else {
2022: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2023: }
2024: }
2025: #boundaries for contents columns
2026: my @min_len=();#columns can not be narrower
2027: my @max_len=();#maximum length of column
2028: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2029: my ($localmin,$localmax)=(0,0);
2030: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2031: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2032: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2033: }
2034: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2035: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2036: }
2037: }
2038: push @min_len, $localmin;
2039: push @max_len, $localmax;
2040: }
2041: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2042: my $localmin=0,;
2043: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2044: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2045: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2046: }
2047: }
2048: if ($max_len[$jn]<$localmin) {
2049: $max_len[$jn]=$localmin;
2050: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2051: }#object size is bigger
2052: if ($min_len[$jn]<$localmin) {
2053: $min_len[$jn]=$localmin;
2054: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2055: }#object size is bigger
2056: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2057: $min_len[$jn]=0;
2058: $max_len[$jn]=0;
2059: }
2060: }
2061: #final adjustment of column width
2062: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2063: my @adjust=();
2064: #step 1. adjustment by maximum value
2065: my $space_neeeded=0;
2066: for (my $jn=0;$jn<=$#max_len;$jn++) {
2067: $space_neeeded=$space_neeeded+$max_len[$jn];
2068: }
2069: if ($space_neeeded<=$available_space) {
2070: for (my $jn=0;$jn<=$#max_len;$jn++) {
2071: if ($fwidth[$jn]==0) {
2072: $fwidth[$jn]=$max_len[$jn];
2073: }
2074: }
2075: } else {
2076: #step 2. adjustment by minimum value (estimation)
2077: $space_neeeded=0;
2078: for (my $jn=0;$jn<=$#min_len;$jn++) {
2079: $space_neeeded+=$min_len[$jn];
2080: }
2081: if ($space_neeeded>$available_space) {
2082: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2083: for (my $jn=0;$jn<=$#max_len;$jn++) {
2084: if ($fwidth[$jn]==0) {
2085: $fwidth[$jn]=$min_len[$jn];
2086: }
2087: }
2088: #check if we have objects which can be scaled
2089: my $how_many_to_scale=0;
2090: my @to_scale=();
2091: for (my $jn=0;$jn<=$#max_len;$jn++) {
2092: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2093: $how_many_to_scale++;
2094: push @to_scale, $jn;
2095: }
2096: }
2097: if ($how_many_to_scale>0) {
2098: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2099: foreach my $jn (@to_scale) {
2100: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2101: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2102: if ($1 ne '') {
2103: my $current_length=&recalc($1);
2104: $current_length=~/(\d+\.?\d*)/;
2105: $current_length=$current_length-$space_to_adjust;
2106: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2107: }
2108: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2109: if ($1 ne '') {
2110: my $current_length=$1;
2111: $current_length=$current_length-$space_to_adjust;
2112: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2113: }
2114: }
2115: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2116: }
2117: }
2118: } else {
2119: #step 3. adjustment over minimal + corrections
2120: my $enlarge_coef=$available_space/$space_neeeded;
2121: my $acsessive=0;
2122: for (my $jn=0;$jn<=$#min_len;$jn++) {
2123: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2124: if ($adjust[$jn]>$max_len[$jn]) {
2125: $fwidth[$jn]=$max_len[$jn];
2126: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2127: $adjust[$jn]=0;
2128: }
2129: }
2130: if ($acsessive>0) {
2131: #we have an excess of space and can redistribute it
2132: my $notempty_columns=0;
2133: for (my $jn=0;$jn<=$#min_len;$jn++) {
2134: if ($adjust[$jn]!=0) {
2135: $notempty_columns++;
2136: }
2137: }
2138: my $per_column=$acsessive/$notempty_columns;
2139: for (my $jn=0;$jn<=$#min_len;$jn++) {
2140: if ($adjust[$jn]!=0) {
2141: $adjust[$jn]+=$per_column;
2142: $fwidth[$jn]=$adjust[$jn];
2143: }
2144: }
2145: } else {
2146: for (my $jn=0;$jn<=$#min_len;$jn++) {
2147: $fwidth[$jn]=$adjust[$jn];
2148: }
2149: }
2150: }
2151: }
2152: #use all available width if it is defined in % or as TeXwidth
2153: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2154: my $current=0;
2155: for (my $i=0;$i<=$#fwidth;$i++) {
2156: $current+=$fwidth[$i];
2157: }
2158: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2159: for (my $i=0;$i<=$#fwidth;$i++) {
2160: $fwidth[$i]*=$coef;
2161: }
2162: }
2163: #removing of empty columns if allowed
2164: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2165: if ($permission eq 'yes') {
2166: my @cleaned_table=();
2167: my @cleaned_header=();
2168: my $colind=0;
2169: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2170: if ($fwidth[$jn]!=0) {
2171: #we need to copy column
2172: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2173: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2174: $cleaned_header[$colind]=$fwidth[$jn];
2175: }
2176: $colind++;
2177: }
2178: }
2179: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2180: @fwidth=@cleaned_header;
2181: }
2182: #construct header of the table
2183: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2184: for (my $in=0;$in<=$#fwidth;$in++) {
2185: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2186: }
2187: $header_of_table .= '}';
2188: #fill the table
2189: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2190: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2191: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2192: # $output.='\vspace*{-6 mm}\begin{center}';
2193: $output.='\begin{center}';
2194: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2195: $output.=' \hfill \llap{'
2196: }
2197: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2198: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2199: # $output.='\end{center}\vspace*{-6 mm}';
2200: $output.='\end{center}';
2201: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2202: $output.='} ';
2203: }
2204: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2205: }
2206: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2207: }
2208: # Note that \newline destroys alignment env's produced by e.g. <div>
2209: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2210: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2211: if ($#Apache::londefdef::table > 0) {
2212: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2213: # Figure out max/and min width by summing us and then
2214: # apply that to the current column of the table we nest in
2215: # if it's larger than the current width or the current width
2216: # is undefined.
2217: #
2218: my $min_nested_width = 0;
2219: my $max_nested_width = 0;
2220: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2221:
2222: $min_nested_width += $min_len[$col];
2223: $max_nested_width += $max_len[$col];
2224: }
2225: # Fudge in an extra 5 mm for borders etc:
2226:
2227: $min_nested_width += 5;
2228: $max_nested_width += 5;
2229:
2230: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2231: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2232: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2233: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2234: }
2235: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2236: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2237: }
2238:
2239: pop @Apache::londefdef::table;
2240: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2241: } else {
2242: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2243: pop @Apache::londefdef::table;
2244: undef @Apache::londefdef::table;
2245: }
2246: }
2247: return $currentstring;
2248: }
2249:
2250: #-- <tr> tag (end tag optional)
2251: sub start_tr {
2252: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2253: my $currentstring = '';
2254: if ($target eq 'web') {
2255: $currentstring = $token->[4];
2256: } elsif ($target eq 'tex') {
2257: $Apache::londefdef::table[-1]{'row_number'}++;
2258: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2259: if ($alignchar ne '') {
2260: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2261: } else {
2262: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2263: }
2264: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2265: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2266: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2267: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2268: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2269: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2270: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2271: }
2272: return $currentstring;
2273: }
2274:
2275: sub end_tr {
2276: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2277: my $currentstring = &end_p(); # Close any pending <p> in the row.
2278: if ($target eq 'web') {
2279: $currentstring .= $token->[2];
2280: } elsif ($target eq 'tex') {
2281: if ($Apache::londefdef::TD_redirection) {
2282: &end_td_tex($parstack,$parser,$safeeval);
2283: }
2284:
2285:
2286:
2287: }
2288: return $currentstring;
2289: }
2290:
2291: #-- <td> tag (end tag optional)
2292: sub start_td {
2293: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2294: my $currentstring = '';
2295: if ($target eq 'web') {
2296: $currentstring = $token->[4];
2297: } elsif ($target eq 'tex') {
2298: $Apache::londefdef::TD_redirection = 1;
2299: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2300: }
2301: return $currentstring;
2302: }
2303:
2304: sub tag_check {
2305: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2306: my @ar=@$parstack;
2307: for (my $i=$#ar-1;$i>=0;$i--) {
2308: if (lc($$tagstack[$i]) eq $good_tag) {
2309: &start_td_tex($parstack,$parser,$safeeval);
2310: last;
2311: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2312: splice @ar, $i+1;
2313: &end_td_tex(\@ar,$parser,$safeeval);
2314: &start_td_tex($parstack,$parser,$safeeval);
2315: last;
2316: }
2317: }
2318: return '';
2319: }
2320:
2321: sub start_td_tex {
2322: my ($parstack,$parser,$safeeval) = @_;
2323: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2324: if ($alignchar eq '') {
2325: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2326: }
2327: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2328: $Apache::londefdef::table[-1]{'counter_columns'}++;
2329: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2330: if (defined $TeXwidth) {
2331: my $current_length=&recalc($TeXwidth);
2332: $current_length=~/(\d+\.?\d*)/;
2333: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2334: }
2335: &Apache::lonxml::startredirection();
2336: return '';
2337: }
2338:
2339: sub end_td_tex {
2340: my ($parstack,$parser,$safeeval) = @_;
2341: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2342: my $data=&Apache::lonxml::endredirection();
2343: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2344: if (defined $TeXwidth) {
2345: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2346: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2347: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2348: } else {
2349: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2350: my $garbage_data=$data;
2351: my $fwidth=0;
2352: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2353: my $current_length=&recalc($1);
2354: $current_length=~/(\d+\.?\d*)/;
2355: if ($fwidth<$1) {$fwidth=$1;}
2356: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2357: }
2358: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2359: my $current_length=$1;
2360: if ($fwidth<$current_length) {$fwidth=$current_length;}
2361: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2362: }
2363: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2364: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2365: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2366: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2367: } elsif ($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)*/) {
2368: my $garbage_data=$data;
2369: my $fwidth=0;
2370: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2371: my $current_length=&recalc($1);
2372: $current_length=~/(\d+\.?\d*)/;
2373: if ($fwidth<$1) {$fwidth=$1;}
2374: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2375: }
2376: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2377: my $current_length=&recalc($1);
2378: $current_length=~/(\d+\.?\d*)/;
2379: if ($fwidth<$1) {$fwidth=$1;}
2380: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2381: }
2382: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2383: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2384: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2385: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2386: $data=~s/\\\\\s*$//;
2387: } else {
2388: $data=~s/^\s+(\S.*)/$1/;
2389: $data=~s/(.*\S)\s+$/$1/;
2390: $data=~s/(\s)+/$1/;
2391: my ($current_length,$min_length)=(0,0);
2392: if ($data=~/\\vskip/) {
2393: my $newdata=$data;
2394: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2395: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2396: foreach my $elementdata (@newdata) {
2397: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2398: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2399: my @words=split(/ /,$elementdata);
2400: foreach my $word (@words) {
2401: my $lengthword=2.5*&LATEX_length($word);
2402: if ($min_length<$lengthword) {$min_length=$lengthword;}
2403: }
2404: }
2405: } else {
2406: $current_length=2.5*&LATEX_length($data);
2407: my @words=split(/ /,$data);
2408: foreach my $word (@words) {
2409: my $lengthword=2*&LATEX_length($word);
2410: if ($min_length<$lengthword) {$min_length=$lengthword;}
2411: }
2412: }
2413: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2414: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2415: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2416: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2417: }
2418: }
2419: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2420: my $nested = $Apache::londefdef::table[-1]{'include'}[$in];
2421: &Apache::lonnet::logthis("Nested: $nested");
2422: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2423: &Apache::lonnet::logthis("After sub: $nested");
2424: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2425: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2426: }
2427: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2428: return'';
2429: }
2430:
2431: sub end_td {
2432: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2433: my $currentstring = '';
2434: if ($target eq 'web') {
2435: $currentstring = $token->[2];
2436: } elsif ($target eq 'tex') {
2437: $Apache::londefdef::TD_redirection =0;
2438: &end_td_tex($parstack,$parser,$safeeval);
2439: }
2440: return $currentstring;
2441: }
2442:
2443: #-- <th> tag (end tag optional)
2444: sub start_th {
2445: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2446: my $currentstring = '';
2447: if ($target eq 'web') {
2448: $currentstring = $token->[4];
2449: } elsif ($target eq 'tex') {
2450: $Apache::londefdef::TD_redirection = 1;
2451: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2452: }
2453: return $currentstring;
2454: }
2455:
2456: sub tagg_check {
2457: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2458: my @ar=@$parstack;
2459: for (my $i=$#ar-1;$i>=0;$i--) {
2460: if (lc($$tagstack[$i]) eq $good_tag) {
2461: &start_th_tex($parstack,$parser,$safeeval);
2462: last;
2463: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2464: splice @ar, $i+1;
2465: &end_th_tex(\@ar,$parser,$safeeval);
2466: &start_th_tex($parstack,$parser,$safeeval);
2467: last;
2468: }
2469: }
2470: return '';
2471: }
2472:
2473: sub start_th_tex {
2474: my ($parstack,$parser,$safeeval) = @_;
2475: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2476: if ($alignchar eq '') {
2477: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2478: }
2479: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2480: $Apache::londefdef::table[-1]{'counter_columns'}++;
2481: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2482: if (defined $TeXwidth) {
2483: my $current_length=&recalc($TeXwidth);
2484: $current_length=~/(\d+\.?\d*)/;
2485: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2486: }
2487: &Apache::lonxml::startredirection();
2488: return '';
2489: }
2490:
2491: sub end_th_tex {
2492: my ($parstack,$parser,$safeeval) = @_;
2493: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2494: my $data=&Apache::lonxml::endredirection();
2495: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2496: if (defined $TeXwidth) {
2497: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2498: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2499: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2500: } else {
2501: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2502: my $garbage_data=$data;
2503: my $fwidth=0;
2504: while ($garbage_data=~m/width\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: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2509: }
2510: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2511: my $current_length=$1;
2512: if ($fwidth<$current_length) {$fwidth=$current_length;}
2513: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2514: }
2515: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2516: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2517: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2518: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2519: } else {
2520: $data=~s/^\s+(\S.*)/$1/;
2521: $data=~s/(.*\S)\s+$/$1/;
2522: $data=~s/(\s)+/$1/;
2523: my ($current_length,$min_length)=(0,0);
2524: if ($data=~/\\vskip/) {
2525: my $newdata=$data;
2526: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2527: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2528: foreach my $elementdata (@newdata) {
2529: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2530: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2531: my @words=split(/ /,$elementdata);
2532: foreach my $word (@words) {
2533: my $lengthword=2.5*&LATEX_length($word);
2534: if ($min_length<$lengthword) {$min_length=$lengthword;}
2535: }
2536: }
2537: } else {
2538: $current_length=2.5*&LATEX_length($data);
2539: my @words=split(/ /,$data);
2540: foreach my $word (@words) {
2541: my $lengthword=2*&LATEX_length($word);
2542: if ($min_length<$lengthword) {$min_length=$lengthword;}
2543: }
2544: }
2545: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2546: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2547: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2548: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2549: }
2550: }
2551: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2552: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2553: }
2554: #make data bold
2555: $data='\textbf{'.$data.'}';
2556: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2557: return'';
2558: }
2559:
2560: sub end_th {
2561: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2562: my $currentstring = &end_p(); # Close any open <p> in the row.
2563: if ($target eq 'web') {
2564: $currentstring .= $token->[2];
2565: } elsif ($target eq 'tex') {
2566: $Apache::londefdef::TD_redirection =0;
2567: &end_th_tex($parstack,$parser,$safeeval);
2568: }
2569: return $currentstring;
2570: }
2571:
2572: #-- <img> tag (end tag forbidden)
2573: #
2574: # Render the <IMG> tag.
2575: # <IMG> has the following attributes (in addition to the
2576: # standard HTML ones:
2577: # TeXwrap - Governs how the tex target will try to wrap text around
2578: # horizontally aligned images.
2579: # TeXwidth - The width of the image when rendered for print (mm).
2580: # TeXheight - The height of the image when rendered for print (mm)
2581: # (Note there seems to also be support for this as a % of page size)
2582: #
2583: sub start_img {
2584: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2585: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2586: undef,1);
2587: if (not $src and ($target eq 'web' or $target eq 'tex')) {
2588: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2589: return '';
2590: }
2591: &Apache::lonxml::extlink($src);
2592: my $currentstring = '';
2593: my $scaling = .3;
2594:
2595: # Render unto browsers that which are the browser's...
2596:
2597: if ($target eq 'web') {
2598: if ($env{'browser.imagesuppress'} ne 'on') {
2599: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2600: } else {
2601: my $alttag= &Apache::lonxml::get_param
2602: ('alt',$parstack,$safeeval,undef,1);
2603: unless ($alttag) {
2604: $alttag=&Apache::lonmeta::alttag
2605: ($Apache::lonxml::pwd[-1],$src);
2606: }
2607: $currentstring.='[IMAGE: '.$alttag.']';
2608: }
2609:
2610: # and render unto TeX that which is LaTeX
2611:
2612: } elsif ($target eq 'tex') {
2613: #
2614: # The alignment will require some superstructure to be put around
2615: # the \includegraphics stuff. At present we can only partially
2616: # simulate the alignments offered by html.
2617: #
2618: #
2619: my $align = lc(&Apache::lonxml::get_param('align',
2620: $parstack,
2621: $safeeval,
2622: undef,1));
2623: if(!$align) {
2624: if (&is_inside_of($tagstack, "table")) {
2625: $align = "right"; # Force wraptext use.
2626: } else {
2627: $align = "bottom"; # This is html's default so it's ours too.
2628: }
2629: }
2630: #
2631: &Apache::lonxml::debug("Alignemnt = $align");
2632: # LaTeX's image/text wrapping is really bad since it wants to
2633: # make figures float.
2634: # The user has the optional parameter (applicable only to l/r
2635: # alignment to use the picins/parpic directive to get wrapped text
2636: # this is also imperfect.. that's why we give them a choice...
2637: # so they can't yell at us for our choice.
2638: #
2639: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2640: $parstack,
2641: $safeeval,
2642: undef,0);
2643: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2644: if(!$latex_rendering) {
2645: $latex_rendering = "texwrap";
2646: }
2647: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2648:
2649: #if original gif/jpg/png file exist do following:
2650: my $origsrc=$src;
2651: my ($path,$file) = &get_eps_image($src);
2652: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2653: &Apache::lonxml::debug("path = $path file = $file src = $src");
2654: if (-e $src) {
2655: &Apache::lonxml::debug("$src exists");
2656: my ($height_param,$width_param)=
2657: &image_size($origsrc,0.3,$parstack,$safeeval);
2658: my $destpath = $path;
2659: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2660: my $destfile = $file;
2661: $destfile =~ s/ /\_/g;
2662: my $size;
2663: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2664: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2665: $size='['.$size;
2666: $size=~s/,$/]/;
2667: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2668: .'\includegraphics'.$size.'{'.$destfile.'} ';
2669:
2670: # If there's an alignment specification we need to honor it here.
2671: # For the horizontal alignments, we will also honor the
2672: # value of the latex specfication. The default is parbox,
2673: # and that's used for illegal values too.
2674: #
2675: # Even though we set a default alignment value, the user
2676: # could have given us an illegal value. In that case we
2677: # just use the default alignment of bottom..
2678: if ($align eq "top") {
2679: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2680: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2681: my $offset = $height_param/2;
2682: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2683: } elsif ($align eq "left") {
2684: if ($latex_rendering eq "parpic") {
2685: $currentstring = '\parpic[l]{'.$currentstring.'}';
2686: } else { # wrapfig render
2687: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2688: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2689: }
2690: } elsif ($align eq "right") {
2691: if ($latex_rendering eq "parpic") {
2692: $currentstring = '\parpic[r]{'.$currentstring.'}';
2693: } else { # wrapfig rendering
2694: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2695: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2696:
2697: }
2698: } else { # Bottom is also default.
2699: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2700: }
2701: } else {
2702: &Apache::lonxml::debug("$src does not exist");
2703: #original image file doesn't exist so check the alt attribute
2704: my $alt =
2705: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2706: unless ($alt) {
2707: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2708: }
2709:
2710: if ($alt) { $currentstring .= ' '.$alt.' '; }
2711: }
2712:
2713: # And here's where the semi-quote breaks down: allow the user
2714: # to edit the beast as well by rendering the problem for edit:
2715: } elsif ($target eq 'edit') {
2716: $currentstring .=&Apache::edit::tag_start($target,$token);
2717: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2718: &Apache::edit::browse('src',undef,'alt').' '.
2719: &Apache::edit::search('src',undef,'alt').'<br />';
2720: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2721: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2722: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2723: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2724: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2725: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2726: ['','bottom','middle','top','left','right'],$token,5);
2727: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2728: ['', 'parbox', 'parpic'], $token, 2);
2729: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2730: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2731: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2732: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2733: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2734:
2735:
2736: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2737: if ($width) { $currentstring.=' width="'.$width.'" '; }
2738: if ($height) { $currentstring.=' height="'.$height.'" '; }
2739: $currentstring .= ' />';
2740: } elsif ($target eq 'modified') {
2741: my ($osrc,$owidth,$oheight)=
2742: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2743: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2744: $safeeval,'src','alt','align',
2745: 'TeXwidth','TeXheight', 'TeXwrap',
2746: 'width','height');
2747: my ($nsrc,$nwidth,$nheight)=
2748: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2749: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2750: &image_replication($loc);
2751: my ($iwidth,$iheight);
2752: if (-e $loc) {
2753: my $image = Image::Magick->new;
2754: $image->Read($loc);
2755: ($iwidth, $iheight) = ($image->Get('width'),
2756: $image->Get('height'));
2757: }
2758: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2759: # changed image or no size specified,
2760: # if they didn't explicitly change the
2761: # width or height use the ones from the image
2762: if ($iwidth && $iheight) {
2763: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2764: $token->[2]{'width'} = $iwidth;$ctag=1;
2765: }
2766: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2767: $token->[2]{'height'}=$iheight;$ctag=1;
2768: }
2769: }
2770: }
2771: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2772: # if we don't have a width or height
2773: if ($iwidth && $cwidth && !$cheight) {
2774: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2775: }
2776: if ($iheight && $cheight && !$cwidth) {
2777: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2778: }
2779: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2780: }
2781:
2782: return $currentstring;
2783: }
2784:
2785: sub end_img {
2786: my ($target,$token) = @_;
2787: my $currentstring = '';
2788: if ($target eq 'web') {
2789: $currentstring = $token->[2];
2790: } elsif ($target eq 'tex') {
2791: $currentstring = '';
2792: }
2793: return $currentstring;
2794: }
2795:
2796: #-- <applet> tag (end tag required)
2797: sub start_applet {
2798: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2799:
2800: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2801: &Apache::lonxml::extlink($code);
2802: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2803: undef,1);
2804: &Apache::lonxml::extlink($archive);
2805: my $currentstring = '';
2806: if ($target eq 'web') {
2807: if ($env{'browser.appletsuppress'} ne 'on') {
2808: $currentstring = &Apache::lonenc::encrypt_ref($token,
2809: {'code'=>$code,
2810: 'archive'=>$archive}
2811: );
2812: } else {
2813: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2814: $safeeval,undef,1);
2815: unless ($alttag) {
2816: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2817: $code);
2818: }
2819: $currentstring='[APPLET: '.$alttag.']';
2820: }
2821: } elsif ($target eq 'tex') {
2822: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2823: $safeeval,undef,1);
2824: unless ($alttag) {
2825: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2826: undef,1);
2827: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2828: $code);
2829: }
2830: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2831: '.}\end{center}';
2832: }
2833: return $currentstring;
2834: }
2835:
2836: sub end_applet {
2837: my ($target,$token) = @_;
2838: my $currentstring = '';
2839: if ($target eq 'web') {
2840: $currentstring = $token->[2];
2841: } elsif ($target eq 'tex') {
2842: }
2843: return $currentstring;
2844: }
2845:
2846: #-- <embed> tag (end tag optional/required)
2847: sub start_embed {
2848: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2849: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2850: &Apache::lonxml::extlink($src);
2851: my $currentstring = '';
2852: if ($target eq 'web') {
2853: if ($env{'browser.embedsuppress'} ne 'on') {
2854: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2855: } else {
2856: my $alttag=&Apache::lonxml::get_param
2857: ('alt',$parstack,$safeeval,undef,1);
2858: unless ($alttag) {
2859: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2860: }
2861: $currentstring='[EMBED: '.$alttag.']';
2862: }
2863: } elsif ($target eq 'tex') {
2864: }
2865: return $currentstring;
2866: }
2867:
2868: sub end_embed {
2869: my ($target,$token) = @_;
2870: my $currentstring = '';
2871: if ($target eq 'web') {
2872: $currentstring = $token->[2];
2873: } elsif ($target eq 'tex') {
2874: }
2875: return $currentstring;
2876: }
2877:
2878: #-- <param> tag (end tag forbidden)
2879: sub start_param {
2880: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2881: if (&Apache::lonxml::get_param('name',$parstack,
2882: $safeeval,undef,1)=~/^cabbase$/i) {
2883: my $value=&Apache::lonxml::get_param('value',$parstack,
2884: $safeeval,undef,1);
2885: &Apache::lonxml::extlink($value);
2886: }
2887:
2888: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2889: &Apache::lonxml::extlink($src);
2890: my $currentstring = '';
2891: if ($target eq 'web') {
2892: my %toconvert;
2893: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2894: if ($src) { $toconvert{'src'}= $src; }
2895: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
2896: undef,1);
2897: if ($name=~/^cabbase$/i) {
2898: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
2899: $safeeval,undef,1);
2900: }
2901: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
2902: } elsif ($target eq 'tex') {
2903: }
2904: return $currentstring;
2905: }
2906:
2907: sub end_param {
2908: my ($target,$token) = @_;
2909: my $currentstring = '';
2910: if ($target eq 'web') {
2911: $currentstring = $token->[2];
2912: } elsif ($target eq 'tex') {
2913: }
2914: return $currentstring;
2915: }
2916:
2917: #-- <allow> tag
2918: sub start_allow {
2919: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2920: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2921: &Apache::lonxml::extlink($src);
2922:
2923: if ($target eq 'tex') { &image_replication($src); }
2924: my $result;
2925: if ($target eq 'edit') {
2926: $result .=&Apache::edit::tag_start($target,$token);
2927: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
2928: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
2929: } elsif ($target eq 'modified') {
2930: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
2931: $safeeval,'src');
2932: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
2933: }
2934: return $result;
2935: }
2936:
2937: sub end_allow {
2938: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2939: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
2940: return '';
2941: }
2942:
2943: #-- Frames (end tag required)
2944: #-- <frameset>
2945: sub start_frameset {
2946: my ($target,$token) = @_;
2947: my $currentstring = ''; # Close any pending para.
2948: if ($target eq 'web') {
2949: if (!$Apache::lonxml::registered &&
2950: $env{'request.state'} eq 'published') {
2951: $currentstring.='<head>'.
2952: &Apache::lonmenu::registerurl(undef,$target).'</head>';
2953: }
2954: my $onLoad='';
2955: foreach my $key (keys(%{$token->[2]})) {
2956: if ($key =~ /^onload$/i) {
2957: $onLoad.=$token->[2]->{$key}.';';
2958: delete($token->[2]->{$key});
2959: }
2960: }
2961: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
2962: my $onUnload='';
2963: foreach my $key (keys(%{$token->[2]})) {
2964: if ($key =~ /^onunload$/i) {
2965: $onUnload.=$token->[2]->{$key}.';';
2966: delete($token->[2]->{$key});
2967: }
2968: }
2969: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
2970: ';'.$onUnload;
2971:
2972: $currentstring .= '<'.$token->[1];
2973: foreach (keys %{$token->[2]}) {
2974: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
2975: }
2976: $currentstring.='>';
2977: }
2978: return $currentstring;
2979: }
2980:
2981: sub end_frameset {
2982: my ($target,$token) = @_;
2983: my $currentstring = '';
2984: if ($target eq 'web') {
2985: $currentstring = $token->[2];
2986: }
2987: return $currentstring;
2988: }
2989:
2990: #-- <xmp> (end tag required)
2991: sub start_xmp {
2992: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2993: my $currentstring = '';
2994: if ($target eq 'web') {
2995: $currentstring .= $token->[4];
2996: } elsif ($target eq 'tex') {
2997: $currentstring .= '\begin{verbatim}';
2998: }
2999: return $currentstring;
3000: }
3001:
3002: sub end_xmp {
3003: my ($target,$token) = @_;
3004: my $currentstring = '';
3005: if ($target eq 'web') {
3006: $currentstring .= $token->[2];
3007: } elsif ($target eq 'tex') {
3008: $currentstring .= '\end{verbatim}';
3009: }
3010: return $currentstring;
3011: }
3012:
3013: #-- <pre> (end tag required)
3014: sub start_pre {
3015: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3016: my $currentstring = &end_p(); # close off pending <p>
3017: if ($target eq 'web') {
3018: $currentstring .= $token->[4];
3019: } elsif ($target eq 'tex') {
3020: $currentstring .= '\begin{verbatim}';
3021: }
3022: return $currentstring;
3023: }
3024:
3025: sub end_pre {
3026: my ($target,$token) = @_;
3027: my $currentstring = '';
3028: if ($target eq 'web') {
3029: $currentstring .= $token->[2];
3030: } elsif ($target eq 'tex') {
3031: $currentstring .= '\end{verbatim}';
3032: }
3033: return $currentstring;
3034: }
3035:
3036: #-- <insert>
3037: sub start_insert {
3038: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3039: my $currentstring = '';
3040: if ($target eq 'web') {
3041: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3042: $currentstring .= '<b>'.$display.'</b>';;
3043: }
3044: return $currentstring;
3045: }
3046:
3047: sub end_insert {
3048: my ($target,$token) = @_;
3049: my $currentstring = '';
3050: if ($target eq 'web') {
3051: $currentstring .= '';
3052: }
3053: return $currentstring;
3054: }
3055:
3056: #-- <externallink>
3057: sub start_externallink {
3058: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3059: my $currentstring = '';
3060: if ($target eq 'web') {
3061: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3062: $currentstring .= '<b>'.$display.'</b>';;
3063: }
3064: return $currentstring;
3065: }
3066:
3067: sub end_externallink {
3068: my ($target,$token) = @_;
3069: my $currentstring = '';
3070: if ($target eq 'web') {
3071: $currentstring .= '';
3072: }
3073: return $currentstring;
3074: }
3075:
3076: #-- <blankspace heigth="">
3077: sub start_blankspace {
3078: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3079: my $currentstring = &end_p(); # closes off any unclosed <p>
3080: if ($target eq 'tex') {
3081: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3082: $currentstring .= '\vskip '.$howmuch.' ';
3083: }
3084: return $currentstring;
3085: }
3086:
3087: sub end_blankspace {
3088: my ($target,$token) = @_;
3089: my $currentstring = '';
3090: if ($target eq 'tex') {
3091: $currentstring .= '';
3092: }
3093: return $currentstring;
3094: }
3095:
3096: #-- <abbr> tag (end tag required)
3097: sub start_abbr {
3098: my ($target,$token) = @_;
3099: my $currentstring = '';
3100: if ($target eq 'web') {
3101: $currentstring = $token->[4];
3102: }
3103: return $currentstring;
3104: }
3105:
3106: sub end_abbr {
3107: my ($target,$token) = @_;
3108: my $currentstring = '';
3109: if ($target eq 'web') {
3110: $currentstring = $token->[2];
3111: }
3112: return $currentstring;
3113: }
3114:
3115: #-- <acronym> tag (end tag required)
3116: sub start_acronym {
3117: my ($target,$token) = @_;
3118: my $currentstring = '';
3119: if ($target eq 'web') {
3120: $currentstring = $token->[4];
3121: }
3122: return $currentstring;
3123: }
3124:
3125: sub end_acronym {
3126: my ($target,$token) = @_;
3127: my $currentstring = '';
3128: if ($target eq 'web') {
3129: $currentstring = $token->[2];
3130: }
3131: return $currentstring;
3132: }
3133:
3134: #-- <area> tag (end tag forbidden)
3135: sub start_area {
3136: my ($target,$token) = @_;
3137: my $currentstring = '';
3138: if ($target eq 'web') {
3139: $currentstring = $token->[4];
3140: }
3141: return $currentstring;
3142: }
3143:
3144: sub end_area {
3145: my ($target,$token) = @_;
3146: my $currentstring = '';
3147: if ($target eq 'web') {
3148: $currentstring = $token->[2];
3149: }
3150: return $currentstring;
3151: }
3152:
3153: #-- <base> tag (end tag forbidden)
3154: sub start_base {
3155: my ($target,$token) = @_;
3156: my $currentstring = '';
3157: if ($target eq 'web') {
3158: $currentstring = $token->[4];
3159: }
3160: return $currentstring;
3161: }
3162:
3163: sub end_base {
3164: my ($target,$token) = @_;
3165: my $currentstring = '';
3166: if ($target eq 'web') {
3167: $currentstring = $token->[2];
3168: }
3169: return $currentstring;
3170: }
3171:
3172: #-- <bdo> tag (end tag required)
3173: sub start_bdo {
3174: my ($target,$token) = @_;
3175: my $currentstring = '';
3176: if ($target eq 'web') {
3177: $currentstring = $token->[4];
3178: }
3179: return $currentstring;
3180: }
3181:
3182: sub end_bdo {
3183: my ($target,$token) = @_;
3184: my $currentstring = '';
3185: if ($target eq 'web') {
3186: $currentstring = $token->[2];
3187: }
3188: return $currentstring;
3189: }
3190:
3191: #-- <bgsound> tag (end tag optional)
3192: sub start_bgsound {
3193: my ($target,$token) = @_;
3194: my $currentstring = '';
3195: if ($target eq 'web') {
3196: $currentstring = $token->[4];
3197: }
3198: return $currentstring;
3199: }
3200:
3201: sub end_bgsound {
3202: my ($target,$token) = @_;
3203: my $currentstring = '';
3204: if ($target eq 'web') {
3205: $currentstring = $token->[2];
3206: }
3207: return $currentstring;
3208: }
3209:
3210: #-- <blink> tag (end tag required)
3211: sub start_blink {
3212: my ($target,$token) = @_;
3213: my $currentstring = '';
3214: if ($target eq 'web') {
3215: $currentstring = $token->[4];
3216: }
3217: return $currentstring;
3218: }
3219:
3220: sub end_blink {
3221: my ($target,$token) = @_;
3222: my $currentstring = '';
3223: if ($target eq 'web') {
3224: $currentstring = $token->[2];
3225: }
3226: return $currentstring;
3227: }
3228:
3229: #-- <blockquote> tag (end tag required)
3230: sub start_blockquote {
3231: my ($target,$token) = @_;
3232: my $currentstring = &end_p(); # Close any unclosed <p>
3233: if ($target eq 'web') {
3234: $currentstring .= $token->[4];
3235: }
3236: return $currentstring;
3237: }
3238:
3239: sub end_blockquote {
3240: my ($target,$token) = @_;
3241: my $currentstring = '';
3242: if ($target eq 'web') {
3243: $currentstring = $token->[2];
3244: }
3245: return $currentstring;
3246: }
3247:
3248: #-- <button> tag (end tag required)
3249: sub start_button {
3250: my ($target,$token) = @_;
3251: my $currentstring = '';
3252: if ($target eq 'web') {
3253: $currentstring = $token->[4];
3254: }
3255: return $currentstring;
3256: }
3257:
3258: sub end_button {
3259: my ($target,$token) = @_;
3260: my $currentstring = '';
3261: if ($target eq 'web') {
3262: $currentstring = $token->[2];
3263: }
3264: return $currentstring;
3265: }
3266:
3267: #-- <caption> tag (end tag required)
3268: sub start_caption {
3269: my ($target,$token) = @_;
3270: my $currentstring = '';
3271: if ($target eq 'web') {
3272: $currentstring = $token->[4];
3273: }
3274: return $currentstring;
3275: }
3276:
3277: sub end_caption {
3278: my ($target,$token) = @_;
3279: my $currentstring = '';
3280: if ($target eq 'web') {
3281: $currentstring = $token->[2];
3282: }
3283: return $currentstring;
3284: }
3285:
3286: #-- <col> tag (end tag forbdden)
3287: sub start_col {
3288: my ($target,$token) = @_;
3289: my $currentstring = '';
3290: if ($target eq 'web') {
3291: $currentstring = $token->[4];
3292: }
3293: return $currentstring;
3294: }
3295:
3296: sub end_col {
3297: my ($target,$token) = @_;
3298: my $currentstring = '';
3299: if ($target eq 'web') {
3300: $currentstring = $token->[2];
3301: }
3302: return $currentstring;
3303: }
3304:
3305: #-- <colgroup> tag (end tag optional)
3306: sub start_colgroup {
3307: my ($target,$token) = @_;
3308: my $currentstring = '';
3309: if ($target eq 'web') {
3310: $currentstring = $token->[4];
3311: }
3312: return $currentstring;
3313: }
3314:
3315: sub end_colgroup {
3316: my ($target,$token) = @_;
3317: my $currentstring = '';
3318: if ($target eq 'web') {
3319: $currentstring = $token->[2];
3320: }
3321: return $currentstring;
3322: }
3323:
3324: #-- <del> tag (end tag required)
3325: sub start_del {
3326: my ($target,$token) = @_;
3327: my $currentstring = '';
3328: if ($target eq 'web') {
3329: $currentstring = $token->[4];
3330: }
3331: return $currentstring;
3332: }
3333:
3334: sub end_del {
3335: my ($target,$token) = @_;
3336: my $currentstring = '';
3337: if ($target eq 'web') {
3338: $currentstring = $token->[2];
3339: }
3340: return $currentstring;
3341: }
3342:
3343: #-- <fieldset> tag (end tag required)
3344: sub start_fieldset {
3345: my ($target,$token) = @_;
3346: my $currentstring = '';
3347: if ($target eq 'web') {
3348: $currentstring = $token->[4];
3349: }
3350: return $currentstring;
3351: }
3352:
3353: sub end_fieldset {
3354: my ($target,$token) = @_;
3355: my $currentstring = '';
3356: if ($target eq 'web') {
3357: $currentstring = $token->[2];
3358: }
3359: return $currentstring;
3360: }
3361:
3362: #-- <frame> tag (end tag forbidden)
3363: sub start_frame {
3364: my ($target,$token) = @_;
3365: my $currentstring = '';
3366: if ($target eq 'web') {
3367: $currentstring = $token->[4];
3368: }
3369: return $currentstring;
3370: }
3371:
3372: sub end_frame {
3373: my ($target,$token) = @_;
3374: my $currentstring = '';
3375: if ($target eq 'web') {
3376: $currentstring = $token->[2];
3377: }
3378: return $currentstring;
3379: }
3380:
3381: #-- <iframe> tag (end tag required)
3382: sub start_iframe {
3383: my ($target,$token) = @_;
3384: my $currentstring = '';
3385: if ($target eq 'web') {
3386: $currentstring = $token->[4];
3387: }
3388: return $currentstring;
3389: }
3390:
3391: sub end_iframe {
3392: my ($target,$token) = @_;
3393: my $currentstring = '';
3394: if ($target eq 'web') {
3395: $currentstring = $token->[2];
3396: }
3397: return $currentstring;
3398: }
3399:
3400: #-- <ins> tag (end tag required)
3401: sub start_ins {
3402: my ($target,$token) = @_;
3403: my $currentstring = '';
3404: if ($target eq 'web') {
3405: $currentstring = $token->[4];
3406: }
3407: return $currentstring;
3408: }
3409:
3410: sub end_ins {
3411: my ($target,$token) = @_;
3412: my $currentstring = '';
3413: if ($target eq 'web') {
3414: $currentstring = $token->[2];
3415: }
3416: return $currentstring;
3417: }
3418:
3419: #-- <isindex> tag (end tag forbidden)
3420: sub start_isindex {
3421: my ($target,$token) = @_;
3422: my $currentstring = '';
3423: if ($target eq 'web') {
3424: $currentstring = $token->[4];
3425: }
3426: return $currentstring;
3427: }
3428:
3429: sub end_isindex {
3430: my ($target,$token) = @_;
3431: my $currentstring = '';
3432: if ($target eq 'web') {
3433: $currentstring = $token->[2];
3434: }
3435: return $currentstring;
3436: }
3437:
3438: #-- <keygen> tag (end tag forbidden)
3439: sub start_keygen {
3440: my ($target,$token) = @_;
3441: my $currentstring = '';
3442: if ($target eq 'web') {
3443: $currentstring = $token->[4];
3444: }
3445: return $currentstring;
3446: }
3447:
3448: sub end_keygen {
3449: my ($target,$token) = @_;
3450: my $currentstring = '';
3451: if ($target eq 'web') {
3452: $currentstring = $token->[2];
3453: }
3454: return $currentstring;
3455: }
3456:
3457: #-- <label> tag
3458: sub start_label {
3459: my ($target,$token) = @_;
3460: my $currentstring = '';
3461: if ($target eq 'web') {
3462: $currentstring = $token->[4];
3463: }
3464: return $currentstring;
3465: }
3466:
3467: sub end_label {
3468: my ($target,$token) = @_;
3469: my $currentstring = '';
3470: if ($target eq 'web') {
3471: $currentstring = $token->[2];
3472: }
3473: return $currentstring;
3474: }
3475:
3476: #-- <layer> tag (end tag required)
3477: sub start_layer {
3478: my ($target,$token) = @_;
3479: my $currentstring = '';
3480: if ($target eq 'web') {
3481: $currentstring = $token->[4];
3482: }
3483: return $currentstring;
3484: }
3485:
3486: sub end_layer {
3487: my ($target,$token) = @_;
3488: my $currentstring = '';
3489: if ($target eq 'web') {
3490: $currentstring = $token->[2];
3491: }
3492: return $currentstring;
3493: }
3494:
3495: #-- <legend> tag (end tag required)
3496: sub start_legend {
3497: my ($target,$token) = @_;
3498: my $currentstring = '';
3499: if ($target eq 'web') {
3500: $currentstring = $token->[4];
3501: }
3502: return $currentstring;
3503: }
3504:
3505: sub end_legend {
3506: my ($target,$token) = @_;
3507: my $currentstring = '';
3508: if ($target eq 'web') {
3509: $currentstring = $token->[2];
3510: }
3511: return $currentstring;
3512: }
3513:
3514: #-- <link> tag (end tag forbidden)
3515: sub start_link {
3516: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3517: my $currentstring = '';
3518: if ($target eq 'web') {
3519: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3520: undef,1);
3521: &Apache::lonxml::extlink($href);
3522: $currentstring = $token->[4];
3523: }
3524: return $currentstring;
3525: }
3526:
3527: sub end_link {
3528: my ($target,$token) = @_;
3529: my $currentstring = '';
3530: if ($target eq 'web') {
3531: $currentstring = $token->[2];
3532: }
3533: return $currentstring;
3534: }
3535:
3536: #-- <marquee> tag (end tag optional)
3537: sub start_marquee {
3538: my ($target,$token) = @_;
3539: my $currentstring = '';
3540: if ($target eq 'web') {
3541: $currentstring = $token->[4];
3542: }
3543: return $currentstring;
3544: }
3545:
3546: sub end_marquee {
3547: my ($target,$token) = @_;
3548: my $currentstring = '';
3549: if ($target eq 'web') {
3550: $currentstring = $token->[2];
3551: }
3552: return $currentstring;
3553: }
3554:
3555: #-- <multicol> tag (end tag required)
3556: sub start_multicol {
3557: my ($target,$token) = @_;
3558: my $currentstring = &end_p(); # Close any pending <p>
3559: if ($target eq 'web') {
3560: $currentstring .= $token->[4];
3561: }
3562: return $currentstring;
3563: }
3564:
3565: sub end_multicol {
3566: my ($target,$token) = @_;
3567: my $currentstring = '';
3568: if ($target eq 'web') {
3569: $currentstring = $token->[2];
3570: }
3571: return $currentstring;
3572: }
3573:
3574: #-- <nobr> tag (end tag required)
3575: sub start_nobr {
3576: my ($target,$token) = @_;
3577: my $currentstring = '';
3578: if ($target eq 'web') {
3579: $currentstring = $token->[4];
3580: } elsif ($target eq 'tex') {
3581: $currentstring='\mbox{';
3582: }
3583: return $currentstring;
3584: }
3585:
3586: sub end_nobr {
3587: my ($target,$token) = @_;
3588: my $currentstring = '';
3589: if ($target eq 'web') {
3590: $currentstring = $token->[2];
3591: } elsif ($target eq 'tex') {
3592: $currentstring='}';
3593: }
3594: return $currentstring;
3595: }
3596:
3597: #-- <noembed> tag (end tag required)
3598: sub start_noembed {
3599: my ($target,$token) = @_;
3600: my $currentstring = '';
3601: if ($target eq 'web') {
3602: $currentstring = $token->[4];
3603: }
3604: return $currentstring;
3605: }
3606:
3607: sub end_noembed {
3608: my ($target,$token) = @_;
3609: my $currentstring = '';
3610: if ($target eq 'web') {
3611: $currentstring = $token->[2];
3612: }
3613: return $currentstring;
3614: }
3615:
3616: #-- <noframes> tag (end tag required)
3617: sub start_noframes {
3618: my ($target,$token) = @_;
3619: my $currentstring = '';
3620: if ($target eq 'web') {
3621: $currentstring = $token->[4];
3622: }
3623: return $currentstring;
3624: }
3625:
3626: sub end_noframes {
3627: my ($target,$token) = @_;
3628: my $currentstring = '';
3629: if ($target eq 'web') {
3630: $currentstring = $token->[2];
3631: }
3632: return $currentstring;
3633: }
3634:
3635: #-- <nolayer> tag (end tag required)
3636: sub start_nolayer {
3637: my ($target,$token) = @_;
3638: my $currentstring = '';
3639: if ($target eq 'web') {
3640: $currentstring = $token->[4];
3641: }
3642: return $currentstring;
3643: }
3644:
3645: sub end_nolayer {
3646: my ($target,$token) = @_;
3647: my $currentstring = '';
3648: if ($target eq 'web') {
3649: $currentstring = $token->[2];
3650: }
3651: return $currentstring;
3652: }
3653:
3654: #-- <noscript> tag (end tag required)
3655: sub start_noscript {
3656: my ($target,$token) = @_;
3657: my $currentstring = '';
3658: if ($target eq 'web') {
3659: $currentstring = $token->[4];
3660: }
3661: return $currentstring;
3662: }
3663:
3664: sub end_noscript {
3665: my ($target,$token) = @_;
3666: my $currentstring = '';
3667: if ($target eq 'web') {
3668: $currentstring = $token->[2];
3669: }
3670: return $currentstring;
3671: }
3672:
3673: #-- <object> tag (end tag required)
3674: sub start_object {
3675: my ($target,$token) = @_;
3676: my $currentstring = '';
3677: if ($target eq 'web') {
3678: $currentstring = $token->[4];
3679: }
3680: return $currentstring;
3681: }
3682:
3683: sub end_object {
3684: my ($target,$token) = @_;
3685: my $currentstring = '';
3686: if ($target eq 'web') {
3687: $currentstring = $token->[2];
3688: }
3689: return $currentstring;
3690: }
3691:
3692: #-- <optgroup> tag (end tag required)
3693: sub start_optgroup {
3694: my ($target,$token) = @_;
3695: my $currentstring = '';
3696: if ($target eq 'web') {
3697: $currentstring = $token->[4];
3698: }
3699: return $currentstring;
3700: }
3701:
3702: sub end_optgroup {
3703: my ($target,$token) = @_;
3704: my $currentstring = '';
3705: if ($target eq 'web') {
3706: $currentstring = $token->[2];
3707: }
3708: return $currentstring;
3709: }
3710:
3711: #-- <samp> tag (end tag required)
3712: sub start_samp {
3713: my ($target,$token) = @_;
3714: my $currentstring = '';
3715: if ($target eq 'web') {
3716: $currentstring = $token->[4];
3717: } elsif ($target eq 'tex') {
3718: $currentstring='\texttt{';
3719: }
3720: return $currentstring;
3721: }
3722:
3723: sub end_samp {
3724: my ($target,$token) = @_;
3725: my $currentstring = '';
3726: if ($target eq 'web') {
3727: $currentstring = $token->[2];
3728: } elsif ($target eq 'tex') {
3729: $currentstring='}';
3730: }
3731: return $currentstring;
3732: }
3733:
3734: #-- <server> tag
3735: sub start_server {
3736: my ($target,$token) = @_;
3737: my $currentstring = '';
3738: if ($target eq 'web') {
3739: $currentstring = $token->[4];
3740: }
3741: return $currentstring;
3742: }
3743:
3744: sub end_server {
3745: my ($target,$token) = @_;
3746: my $currentstring = '';
3747: if ($target eq 'web') {
3748: $currentstring = $token->[2];
3749: }
3750: return $currentstring;
3751: }
3752:
3753: #-- <spacer> tag (end tag forbidden)
3754: sub start_spacer {
3755: my ($target,$token) = @_;
3756: my $currentstring = &end_p(); # Close off any open <p> tag.
3757: if ($target eq 'web') {
3758: $currentstring .= $token->[4];
3759: }
3760: return $currentstring;
3761: }
3762:
3763: sub end_spacer {
3764: my ($target,$token) = @_;
3765: my $currentstring = '';
3766: if ($target eq 'web') {
3767: $currentstring = $token->[2];
3768: }
3769: return $currentstring;
3770: }
3771:
3772: #-- <span> tag (end tag required)
3773: sub start_span {
3774: my ($target,$token) = @_;
3775: my $currentstring = '';
3776: if ($target eq 'web') {
3777: $currentstring = $token->[4];
3778: }
3779: return $currentstring;
3780: }
3781:
3782: sub end_span {
3783: my ($target,$token) = @_;
3784: my $currentstring = '';
3785: if ($target eq 'web') {
3786: $currentstring = $token->[2];
3787: }
3788: return $currentstring;
3789: }
3790:
3791: #-- <tbody> tag (end tag optional)
3792: sub start_tbody {
3793: my ($target,$token) = @_;
3794: my $currentstring = '';
3795: if ($target eq 'web') {
3796: $currentstring = $token->[4];
3797: }
3798: return $currentstring;
3799: }
3800:
3801: sub end_tbody {
3802: my ($target,$token) = @_;
3803: my $currentstring = '';
3804: if ($target eq 'web') {
3805: $currentstring = $token->[2];
3806: }
3807: return $currentstring;
3808: }
3809:
3810: #-- <tfoot> tag (end tag optional)
3811: sub start_tfoot {
3812: my ($target,$token) = @_;
3813: my $currentstring = '';
3814: if ($target eq 'web') {
3815: $currentstring = $token->[4];
3816: }
3817: return $currentstring;
3818: }
3819:
3820: sub end_tfoot {
3821: my ($target,$token) = @_;
3822: my $currentstring = '';
3823: if ($target eq 'web') {
3824: $currentstring = $token->[2];
3825: }
3826: return $currentstring;
3827: }
3828:
3829: #-- <thead> tag (end tag optional)
3830: sub start_thead {
3831: my ($target,$token) = @_;
3832: my $currentstring = '';
3833: if ($target eq 'web') {
3834: $currentstring = $token->[4];
3835: }
3836: return $currentstring;
3837: }
3838:
3839: sub end_thead {
3840: my ($target,$token) = @_;
3841: my $currentstring = '';
3842: if ($target eq 'web') {
3843: $currentstring = $token->[2];
3844: }
3845: return $currentstring;
3846: }
3847:
3848: #-- <var> tag
3849: sub start_var {
3850: my ($target,$token) = @_;
3851: my $currentstring = '';
3852: if ($target eq 'web') {
3853: $currentstring = $token->[4];
3854: } elsif ($target eq 'tex') {
3855: $currentstring = '\textit{';
3856: }
3857: return $currentstring;
3858: }
3859:
3860: sub end_var {
3861: my ($target,$token) = @_;
3862: my $currentstring = '';
3863: if ($target eq 'web') {
3864: $currentstring = $token->[2];
3865: } elsif ($target eq 'tex') {
3866: $currentstring = '}';
3867: }
3868: return $currentstring;
3869: }
3870:
3871: #-- <wbr> tag (end tag forbidden)
3872: sub start_wbr {
3873: my ($target,$token) = @_;
3874: my $currentstring = '';
3875: if ($target eq 'web') {
3876: $currentstring = $token->[4];
3877: }
3878: return $currentstring;
3879: }
3880:
3881: sub end_wbr {
3882: my ($target,$token) = @_;
3883: my $currentstring = '';
3884: if ($target eq 'web') {
3885: $currentstring = $token->[2];
3886: }
3887: return $currentstring;
3888: }
3889:
3890: #-- <hideweboutput> tag
3891: sub start_hideweboutput {
3892: my ($target,$token) = @_;
3893: if ($target eq 'web') {
3894: &Apache::lonxml::startredirection();
3895: }
3896: return '';
3897: }
3898:
3899: sub end_hideweboutput {
3900: my ($target,$token) = @_;
3901: my $currentstring = '';
3902: if ($target eq 'web') {
3903: $currentstring = &Apache::lonxml::endredirection();
3904: }
3905: return '';
3906: }
3907:
3908:
3909: sub image_replication {
3910: my $src = shift;
3911: if (not -e $src) { &Apache::lonnet::repcopy($src); }
3912: #replicates eps or ps
3913: my $epssrc = my $pssrc = $src;
3914: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
3915: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
3916: if (not -e $epssrc && not -e $pssrc) {
3917: my $result=&Apache::lonnet::repcopy($epssrc);
3918: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
3919: }
3920: return '';
3921: }
3922: #
3923: # Get correct sizing parameter for an image given
3924: # it's initial ht. and wid. This allows sizing of
3925: # images that are generated on-the-fly (e.g. gnuplot)
3926: # as well as serving as a utility for image_size.
3927: #
3928: # Parameter:
3929: # height_param
3930: # width_param - Initial picture dimensions.
3931: # scaling - A scale factor.
3932: # parstack, - the current stack of tag attributes
3933: # from the xml parser
3934: # safeeval, - pointer to the safespace
3935: # depth, - from what level in the stack to look for attributes
3936: # (assumes -1 if unspecified)
3937: # cis - look for attrubutes case insensitively
3938: # (assumes false)
3939: #
3940: # Returns:
3941: # height, width - new dimensions.
3942: #
3943: sub resize_image {
3944: my ($height_param, $width_param, $scaling,
3945: $parstack, $safeeval, $depth, $cis) = @_;
3946:
3947: # First apply the scaling...
3948:
3949: $height_param = $height_param * $scaling;
3950: $width_param = $width_param * $scaling;
3951:
3952: #do we have any specified LaTeX size of the picture?
3953: my $toget='TeXwidth';
3954: if ($cis) {
3955: $toget=lc($toget);
3956: }
3957: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
3958: $safeeval,$depth,$cis);
3959: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
3960: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
3961: $safeeval,$depth,$cis);
3962: #do we have any specified web size of the picture?
3963: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
3964: $depth,1);
3965: if ($TeXwidth) {
3966: my $old_width_param=$width_param;
3967: if ($TeXwidth=~/(\d+)\s*\%/) {
3968: $width_param = $1*$env{'form.textwidth'}/100;
3969: } else {
3970: $width_param = $TeXwidth;
3971: }
3972: if ($TeXheight) {
3973: $height_param = $TeXheight;
3974: } elsif ($old_width_param) {
3975: $height_param=$TeXwidth/$old_width_param*$height_param;
3976: }
3977: } elsif ($TeXheight) {
3978: $height_param = $TeXheight;
3979: if ($height_param) {
3980: $width_param = $TeXheight/$height_param*$width_param;
3981: }
3982: } elsif ($width) {
3983: my $old_width_param=$width_param;
3984: $width_param = $width*$scaling;
3985: if ($old_width_param) {
3986: $height_param=$width_param/$old_width_param*$height_param;
3987: }
3988: }
3989: if ($width_param > $env{'form.textwidth'}) {
3990: my $old_width_param=$width_param;
3991: $width_param =0.95*$env{'form.textwidth'};
3992: if ($old_width_param) {
3993: $height_param=$width_param/$old_width_param*$height_param;
3994: }
3995: }
3996:
3997: return ($height_param, $width_param);
3998: }
3999:
4000: sub image_size {
4001: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4002:
4003: #size of image from gif/jpg/jpeg/png
4004: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4005: if (-e $ressrc) {
4006: $src = $ressrc;
4007: }
4008: my $image = Image::Magick->new;
4009: my $current_figure = $image->Read($src);
4010: my $width_param = $image->Get('width');
4011: my $height_param = $image->Get('height');
4012: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4013: undef($image);
4014:
4015: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4016: $scaling, $parstack, $safeeval,
4017: $depth, $cis);
4018:
4019: return ($height_param, $width_param);
4020: }
4021:
4022: sub image_width {
4023: my ($height, $width) = &image_size(@_);
4024: return $width;
4025: }
4026: # Not yet 100% sure this is correct in all circumstances..
4027: # due to my uncertainty about mods to image_size.
4028: #
4029: sub image_height {
4030: my ($height, $width) = &image_size(@_);
4031: return $height;
4032: }
4033:
4034: sub get_eps_image {
4035: my ($src)=@_;
4036: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4037:
4038: # In order to prevent the substitution of the alt text, we need to
4039: # be sure the orig_src file is on system now so:
4040:
4041: if (! -e $orig_src) {
4042: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4043: }
4044: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4045: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4046: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4047: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4048: &Apache::lonxml::debug("Filelocation gives: $src");
4049: if (! -e $src) {
4050: &Apache::lonxml::debug("$src does not exist");
4051: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4052: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4053: #if replication failed try to find ps file
4054: $src=~s/\.eps$/\.ps/;
4055: &Apache::lonxml::debug("Now looking for $src");
4056: #if no ps file try to replicate it.
4057: my $didrepcopy = &Apache::lonnet::repcopy($src);
4058: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4059: if ( (not -e $src) ||
4060: ($didrepcopy ne 'ok')) {
4061: &Apache::lonxml::debug("Failed to find or replicate $src");
4062:
4063: #if replication failed try to produce eps file dynamically
4064: $src=~s/\.ps$/\.eps/;
4065: my $temp_file;
4066: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4067: my $newsrc=$orig_src;
4068: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4069: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4070: print FILE "$newsrc\n";
4071: close FILE;
4072: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4073: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4074: if ($sext ne "") { # Put the ext. back in to uniquify.
4075: $src =~ s/\.eps$/$sext.eps/;
4076: }
4077: }
4078: }
4079: }
4080: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4081: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4082: return ($path.'/',$file);
4083: }
4084:
4085: sub eps_generation {
4086: my ($src,$file,$width_param) = @_;
4087: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4088: my $temp_file = Apache::File->new('>>'.$filename);
4089: print $temp_file "$src\n";
4090: my $newsrc = $src;
4091: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4092: $newsrc=~s/\/home\/httpd\/html\/res//;
4093: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4094: $newsrc=~s/\/\.\//\//;
4095: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4096: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4097: $newsrc=~s/\/home\/httpd\/lonUsers//;
4098: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4099: }
4100: if ($newsrc=~/\/userfiles\//) {
4101: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4102: } else {
4103: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4104: }
4105: }
4106:
4107: sub file_path {
4108: my $src=shift;
4109: my ($file,$path);
4110: if ($src =~ m!(.*)/([^/]*)$!) {
4111: $file = $2;
4112: $path = $1.'/';
4113: }
4114: return $file,$path;
4115: }
4116: # Converts a measurement in to mm from any of
4117: # the other valid LaTeX units of measure.
4118: # If the units of measure are missing from the
4119: # parameter, it is assumed to be in and returned
4120: # with mm units of measure
4121: sub recalc {
4122: my $argument = shift;
4123: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4124: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4125: my $value=$1;
4126: my $units=$2;
4127: if ($units eq 'cm') {
4128: $value*=10;
4129: } elsif ($units eq 'in') {
4130: $value*=25.4;
4131: } elsif ($units eq 'pc') {
4132: $value*=(25.4*12/72.27);
4133: } elsif ($units eq 'pt') {
4134: $value*=(25.4/72.27);
4135: }
4136: return $value.' mm';
4137: }
4138:
4139: sub LATEX_length {
4140: my $garbage=shift;
4141: $garbage=~s/^\s+$//;
4142: $garbage=~s/^\s+(\S.*)/$1/;#space before
4143: $garbage=~s/(.*\S)\s+$/$1/;#space after
4144: $garbage=~s/(\s)+/$1/;#only one space
4145: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4146: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4147: $garbage=~s/([^\\])\$/$1/g;#$
4148: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4149: $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;
4150: $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;
4151: $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;
4152: $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;
4153: $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;
4154: $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;
4155: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4156: #remove some other LaTeX command
4157: $garbage=~s|\\(\w+)\\|\\|g;
4158: $garbage=~s|\\(\w+)(\s*)|$2|g;
4159: $garbage=~s|\+|11|g;
4160: my $value=length($garbage);
4161: return $value;
4162: }
4163:
4164:
4165: # is_inside_of $tagstack $tag
4166: # This sub returns true if the current state of Xml processing
4167: # is inside of the tag.
4168: # Parameters:
4169: # tagstack - The tagstack from the parser.
4170: # tag - The tag (without the <>'s.).
4171: # Sample usage:
4172: # if (is_inside_of($tagstack "table")) {
4173: # # I'm in a table....
4174: # }
4175: sub is_inside_of {
4176: my ($tagstack, $tag) = @_;
4177: my @stack = @$tagstack;
4178: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4179: if ($stack[$i] eq $tag) {
4180: return 1;
4181: }
4182: }
4183: return 0;
4184: }
4185:
4186:
4187: 1;
4188: __END__
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