1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.302.2.3 2006/01/13 21:05:57 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: sub initialize_londefdef {
75: $Apache::londefdef::TD_redirection=0;
76: @Apache::londefdef::table = ();
77: $Apache::londefdef::select=0;
78: undef(@Apache::londefdef::description);
79: @Apache::londefdef::DD=(0);
80: @Apache::londefdef::DT=(0);
81: @Apache::londefdef::seenDT=(0);
82: $Apache::londefdef::list_index=0;
83: }
84:
85: #======================= TAG SUBROUTINES =====================
86: #-- <output>
87: sub start_output {
88: my ($target) = @_;
89: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
90: return '';
91: }
92: sub end_output {
93: my ($target) = @_;
94: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
95: return '';
96: }
97: #-- <m> tag
98: sub start_m {
99: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
100: my $currentstring = '';
101: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
102: if ($target eq 'web' || $target eq 'analyze') {
103: &Apache::lonxml::debug("M is starting with:$inside:");
104: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
105: if ($eval eq 'on') {
106: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
107: #&Apache::lonxml::debug("M is evaulated to:$inside:");
108: }
109: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
110: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
111: if ($Apache::lontexconvert::errorstring) {
112: &Apache::lonxml::warning("tth error: ".
113: $Apache::lontexconvert::errorstring);
114: $Apache::lontexconvert::errorstring='';
115: }
116: #&Apache::lonxml::debug("M is ends with:$currentstring:");
117: $Apache::lonxml::post_evaluate=0;
118: } elsif ($target eq 'tex') {
119: $currentstring = $inside;
120: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
121: if ($eval eq 'on') {
122: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
123: }
124: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
125: # detect simple math mode entry exits, and convert them
126: # to use \ensuremath
127: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
128: $currentstring=~s/^(\s*)\$/$1/;
129: $currentstring=~s/\$(\s*)$/$1/;
130: $currentstring='\ensuremath{'.$currentstring.'}';
131: }
132: $Apache::lonxml::post_evaluate=0;
133: }
134: return $currentstring;
135: }
136:
137: sub end_m {
138: my ($target,$token) = @_;
139: my $currentstring = '';
140: if ($target eq 'tex') {
141: $currentstring = "";
142: }
143: return $currentstring;
144: }
145:
146: sub start_tthoption {
147: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
148: my $result;
149: if ($target eq 'web') {
150: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
151: $style);
152: $inside=~s/^\s*//;
153: if ($env{'browser.mathml'}) {
154: &tth::ttmoptions($inside);
155: } else {
156: &tth::tthoptions($inside);
157: }
158: }
159: return $result;
160: }
161:
162: sub end_tthoption {
163: my ($target,$token) = @_;
164: my $result;
165: return $result;
166: }
167:
168: #-- <html> tag (end tag optional)
169: sub start_html {
170: my ($target,$token) = @_;
171: my $currentstring = '';
172: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
173: &Apache::lontexconvert::init_tth();
174: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
175: $currentstring = &Apache::lonxml::xmlbegin();
176: } elsif ($target eq 'tex') {
177: $currentstring .= '\documentclass[letterpaper]{article}';
178: if (($env{'form.latex_type'}=~'batchmode') ||
179: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
180: $currentstring .= '\newcommand{\keephidden}[1]{}'.
181: '\renewcommand{\deg}{$^{\circ}$}'.
182: '\usepackage{longtable}'.
183: '\usepackage{textcomp}'.
184: '\usepackage{makeidx}'.
185: '\usepackage[dvips]{graphicx}'.
186: '\usepackage{wrapfig}'.
187: '\usepackage{picins}'.
188: '\usepackage{epsfig}'.
189: '\usepackage{calc}'.
190: '\usepackage{amsmath}'.
191: '\usepackage{amssymb}'.
192: '\usepackage{amsfonts}'.
193: '\usepackage{amsthm}'.
194: '\usepackage{amscd}'.
195: '\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}}'.
196: '\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}}';
197: }
198: return $currentstring;
199: }
200:
201: sub end_html {
202: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
203: my $currentstring = '';
204: if ($target eq 'web') {
205: $currentstring = '</html>';
206: }
207: return $currentstring;
208: }
209:
210: #-- <head> tag (end tag optional)
211: sub start_head {
212: my ($target,$token) = @_;
213: my $currentstring = '';
214: if ($target eq 'web') {
215: $currentstring = $token->[4].&Apache::lonxml::fontsettings();
216: }
217: return $currentstring;
218: }
219:
220: sub end_head {
221: my ($target,$token) = @_;
222: my $currentstring = '';
223: if ($target eq 'web' && $env{'request.state'} eq 'published') {
224: $currentstring = &Apache::lonmenu::registerurl(undef,$target).
225: $token->[2];
226: }
227: return $currentstring;
228: }
229:
230: #-- <map> tag (end tag required)
231: sub start_map {
232: my ($target,$token) = @_;
233: my $currentstring = '';
234: if ($target eq 'web') {
235: $currentstring = $token->[4];
236: }
237: return $currentstring;
238: }
239:
240: sub end_map {
241: my ($target,$token) = @_;
242: my $currentstring = '';
243: if ($target eq 'web') {
244: $currentstring = $token->[2];
245: }
246: return $currentstring;
247: }
248:
249: #-- <select> tag (end tag required)
250: sub start_select {
251: my ($target,$token) = @_;
252: my $currentstring = '';
253: if ($target eq 'web') {
254: $currentstring = $token->[4];
255: } elsif ($target eq 'tex') {
256: $Apache::londefdef::select=0;
257: }
258: return $currentstring;
259: }
260:
261: sub end_select {
262: my ($target,$token) = @_;
263: my $currentstring = '';
264: if ($target eq 'web') {
265: $currentstring = $token->[2];
266: }
267: return $currentstring;
268: }
269:
270: #-- <option> tag (end tag optional)
271: sub start_option {
272: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
273: my $currentstring = '';
274: if ($target eq 'web') {
275: $currentstring = $token->[4];
276: } elsif ($target eq 'tex') {
277: $Apache::londefdef::select++;
278: if ($Apache::londefdef::select == 1) {
279: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
280: } else {
281: $currentstring='\keephidden{';
282: }
283: }
284: return $currentstring;
285: }
286:
287: sub end_option {
288: my ($target,$token) = @_;
289: my $currentstring = '';
290: if ($target eq 'web') {
291: $currentstring = $token->[2];
292: } elsif ($target eq 'tex') {
293: $currentstring='}';
294: }
295: return $currentstring;
296: }
297:
298: #-- <input> tag (end tag forbidden)
299: sub start_input {
300: my ($target,$token) = @_;
301: my $currentstring = '';
302: if ($target eq 'web') {
303: $currentstring = $token->[4];
304: }
305: return $currentstring;
306: }
307:
308: sub end_input {
309: my ($target,$token) = @_;
310: my $currentstring = '';
311: if ($target eq 'web') {
312: $currentstring = $token->[2];
313: }
314: return $currentstring;
315: }
316:
317: #-- <textarea> tag (end tag required)
318: sub start_textarea {
319: my ($target,$token) = @_;
320: my $currentstring = '';
321: if ($target eq 'web') {
322: $currentstring = $token->[4];
323: }
324: return $currentstring;
325: }
326:
327: sub end_textarea {
328: my ($target,$token) = @_;
329: my $currentstring = '';
330: if ($target eq 'web') {
331: $currentstring = $token->[2];
332: }
333: return $currentstring;
334: }
335:
336: #-- <form> tag (end tag required)
337: sub start_form {
338: my ($target,$token) = @_;
339: my $currentstring = '';
340: if ($target eq 'web') {
341: $currentstring = $token->[4];
342: }
343: return $currentstring;
344: }
345:
346: sub end_form {
347: my ($target,$token) = @_;
348: my $currentstring = '';
349: if ($target eq 'web') {
350: $currentstring = $token->[2];
351: }
352: return $currentstring;
353: }
354:
355: #-- <title> tag (end tag required)
356: sub start_title {
357: my ($target,$token) = @_;
358: my $currentstring = '';
359: if ($target eq 'web') {
360: $currentstring = $token->[4];
361: } elsif ($target eq 'tex') {
362: $currentstring .= '\keephidden{Title of the document: '
363: }
364: if ($target eq 'meta') {
365: $currentstring='<title>';
366: &start_output($target);
367: }
368: return $currentstring;
369: }
370:
371: sub end_title {
372: my ($target,$token) = @_;
373: my $currentstring = '';
374: if ($target eq 'web') {
375: $currentstring = $token->[2];
376: } elsif ($target eq 'tex') {
377: $currentstring .= '}';
378: }
379: if ($target eq 'meta') {
380: &end_output($target);
381: $currentstring='</title>';
382: }
383: return $currentstring;
384: }
385:
386: #-- <meta> tag (end tag forbidden)
387: sub start_meta {
388: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
389: my $currentstring = '';
390: if ($target eq 'web') {
391: my $args='';
392: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
393: if ($args eq '') {
394: &Apache::lonxml::get_all_text("/meta",$parser,$style);
395: } else {
396: $currentstring = $token->[4];
397: }
398: } elsif ($target eq 'meta') {
399: unless (&Apache::lonxml::get_param
400: ('http-equiv',$parstack,$safeeval,undef,1)) {
401: my $name=$token->[2]->{'name'};
402: $name=~tr/A-Z/a-z/;
403: $name=~s/\s/\_/gs;
404: $name=~s/\W//gs;
405: if ($name) {
406: $currentstring='<'.$name;
407: my $display=&Apache::lonxml::get_param
408: ('display',$parstack,$safeeval,undef,1);
409: if ($display) {
410: $display=~s/\"/\'/g;
411: $currentstring.=' display="'.$display.'"';
412: }
413: $currentstring.='>'.
414: &Apache::lonxml::get_param
415: ('content',$parstack,$safeeval,undef,1).
416: '</'.$name.'>';
417: }
418: my $display=&Apache::lonxml::get_param
419: ('display',$parstack,$safeeval,undef,1);
420: if ($display) {
421: $display=&HTML::Entities::encode($display,'<>&"');
422: $currentstring.='<'.$name.'.display>'.$display.
423: '</'.$name.'.display>';
424: }
425: }
426: } elsif ($target eq 'tex') {
427: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
428: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
429: if ((not defined $content) && (not defined $name)) {
430: &Apache::lonxml::startredirection();
431: }
432: }
433: return $currentstring;
434: }
435:
436: sub end_meta {
437: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
438: my $currentstring = '';
439: if ($target eq 'web') {
440: my $args='';
441: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
442: if ($args ne '') {
443: $currentstring = $token->[4];
444: }
445: } elsif ($target eq 'tex') {
446: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
447: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
448: if ((not defined $content) && (not defined $name)) {
449: &Apache::lonxml::endredirection();
450: }
451: }
452: return $currentstring;
453: }
454:
455: # accessrule
456: sub start_accessrule {
457: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
458: my $currentstring = '';
459: my $eff=&Apache::lonxml::get_param
460: ('effect',$parstack,$safeeval,undef,1);
461: my $realm=&Apache::lonxml::get_param
462: ('realm',$parstack,$safeeval,undef,1);
463: my $role=&Apache::lonxml::get_param
464: ('role',$parstack,$safeeval,undef,1);
465: $realm=~s/\s+//g;
466: $realm=~s/\//\_/g;
467: $realm=~s/^\_//;
468: $realm=~s/\W/\;/g;
469: $role=~s/\s+//g;
470: $role=~s/\//\_/g;
471: $role=~s/\W/\;/g;
472: if ($target eq 'web') {
473: my $args='';
474: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
475: if ($args eq '') {
476: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
477: } else {
478: $currentstring = $token->[4];
479: }
480: }
481: if ($target eq 'meta') {
482: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
483: }
484: return $currentstring;
485: }
486:
487: sub end_accessrule {
488: my ($target,$token,$tagstack,$parstack,$parser) = @_;
489: my $currentstring = '';
490: if ($target eq 'web') {
491: my $args='';
492: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
493: if ($args ne '') {
494: $currentstring = $token->[4];
495: }
496: }
497: return $currentstring;
498: }
499:
500: #-- <body> tag (end tag required)
501: sub start_body {
502: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
503: my $currentstring = '';
504:
505: if ($target eq 'web') {
506: if ($Apache::lonhomework::parsing_a_problem) {
507: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
508: return '';
509: }
510: if (!$Apache::lonxml::registered &&
511: $env{'request.state'} eq 'published') {
512: $currentstring.='<head>'.
513: &Apache::lonmenu::registerurl(undef,$target).'</head>';
514: }
515: # Accessibility
516: if ($env{'browser.imagesuppress'} eq 'on') {
517: delete($token->[2]->{'background'});
518: }
519: if ($env{'browser.fontenhance'} eq 'on') {
520: my $style='';
521: foreach my $key (keys(%{$token->[2]})) {
522: if ($key =~ /^style$/i) {
523: $style.=$token->[2]->{$key}.';';
524: delete($token->[2]->{$key});
525: }
526: }
527: $token->[2]->{'style'}=$style.'; font-size: x-large;';
528: }
529: if ($env{'browser.blackwhite'} eq 'on') {
530: delete($token->[2]->{'font'});
531: delete($token->[2]->{'link'});
532: delete($token->[2]->{'alink'});
533: delete($token->[2]->{'vlink'});
534: delete($token->[2]->{'bgcolor'});
535: delete($token->[2]->{'background'});
536: }
537: # Overload loads
538: my $onLoad='';
539: foreach my $key (keys(%{$token->[2]})) {
540: if ($key =~ /^onload$/i) {
541: $onLoad.=$token->[2]->{$key}.';';
542: delete($token->[2]->{$key});
543: }
544: }
545: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
546: my $onUnload='';
547: foreach my $key (keys(%{$token->[2]})) {
548: if ($key =~ /^onunload$/i) {
549: $onUnload.=$token->[2]->{$key}.';';
550: delete($token->[2]->{$key});
551: }
552: }
553: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
554: ';'.$onUnload;
555:
556: $currentstring .= '<'.$token->[1];
557: foreach (keys %{$token->[2]}) {
558: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
559: }
560: $currentstring.='>';
561: &Apache::lontexconvert::jsMath_reset();
562: if ($env{'environment.texengine'} eq 'jsMath') {
563: $currentstring.=&Apache::lontexconvert::jsMath_header();
564: }
565: if ($env{'request.state'} ne 'published') {
566: if ($env{'environment.remote'} eq 'off') {
567: $currentstring.=
568: &Apache::lonmenu::constspaceform().
569: &Apache::lonmenu::menubuttons(1,'web',1);
570: }
571: $currentstring.=(<<EDITBUTTON);
572: <form method="post">
573: <input type="submit" name="editmode" accesskey="e" value="Edit" />
574: </form>
575: EDITBUTTON
576: } else {
577: $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
578: }
579: $currentstring.=&Apache::lonxml::message_location();
580: } elsif ($target eq 'tex') {
581: $currentstring = '\begin{document}';
582: }
583: return $currentstring;
584: }
585:
586: sub end_body {
587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
588: my $currentstring = &end_p(); # Close off unclosed <p>
589: if ($target eq 'web') {
590: $currentstring .= &Apache::lonxml::xmlend($target,$parser);
591: } elsif ($target eq 'tex') {
592: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
593: }
594: return $currentstring;
595: }
596:
597: # \begin{center} causes a new paragprah spacing that looks odd inside
598: # of a table cell
599: sub center_correction { return '\vspace*{-6 mm}'; }
600: #-- <center> tag (end tag required)
601: sub start_center {
602: my ($target,$token,$tagstack) = @_;
603: my $currentstring = &end_p(); # Close off any prior para.
604: if ($target eq 'web') {
605: $currentstring .= $token->[4];
606: } elsif ($target eq 'tex') {
607: if (&is_inside_of($tagstack, "table")) {
608: $currentstring .= ¢er_correction();
609: }
610: $currentstring .= '\begin{center}';
611: }
612: return $currentstring;
613: }
614:
615: sub end_center {
616: my ($target,$token,$tagstack) = @_;
617: my $currentstring = '';
618: if ($target eq 'web') {
619: $currentstring = $token->[2];
620: } elsif ($target eq 'tex') {
621: $currentstring = '\end{center}';
622: if (&is_inside_of($tagstack, "table")) {
623: #$currentstring .= ¢er_correction();
624: }
625: }
626: return $currentstring;
627: }
628:
629: #-- <b> tag (end tag required)
630: # NOTE: In TeX mode disables internal <p>
631: sub start_b {
632: my ($target,$token) = @_;
633: my $currentstring = '';
634: if ($target eq 'web') {
635: $currentstring = $token->[4];
636: } elsif ($target eq 'tex') {
637: &disable_para();
638: $currentstring .= '\textbf{';
639: }
640: return $currentstring;
641: }
642:
643: sub end_b {
644: my ($target,$token) = @_;
645: my $currentstring = '';
646: if ($target eq 'web') {
647: $currentstring = $token->[2];
648: } elsif ($target eq 'tex') {
649: &enable_para();
650: $currentstring = '}';
651: }
652: return $currentstring;
653: }
654:
655: #-- <strong> tag (end tag required)
656: # NOTE: in TeX mode disables internal <p>
657: sub start_strong {
658: my ($target,$token) = @_;
659: my $currentstring = '';
660: if ($target eq 'web') {
661: $currentstring = $token->[4];
662: } elsif ($target eq 'tex') {
663: &disable_para();
664: $currentstring = '\textbf{';
665: }
666: return $currentstring;
667: }
668:
669: sub end_strong {
670: my ($target,$token) = @_;
671: my $currentstring = '';
672: if ($target eq 'web') {
673: $currentstring = $token->[2];
674: } elsif ($target eq 'tex') {
675: &enable_para();
676: $currentstring = '}';
677: }
678: return $currentstring;
679: }
680:
681: #-- <h1> tag (end tag required)
682: sub start_h1 {
683: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
684: my $currentstring = &end_p(); # Close off any prior para.
685: if ($target eq 'web') {
686: $currentstring .= $token->[4];
687: } elsif ($target eq 'tex') {
688: my $pre;
689: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
690: if ($align eq 'center') {
691: $pre='\begin{center}';
692: } elsif ($align eq 'left') {
693: $pre='\rlap{';
694: } elsif ($align eq 'right') {
695: $pre=' \hfill \llap{';
696: }
697: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
698: if (not defined $TeXsize) {$TeXsize="large";}
699: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
700: } elsif ($target eq 'meta') {
701: $currentstring.='<subject>';
702: &start_output($target);
703: }
704: return $currentstring;
705: }
706:
707: sub end_h1 {
708: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
709: my $currentstring = '';
710: if ($target eq 'web') {
711: $currentstring .= $token->[2];
712: } elsif ($target eq 'tex') {
713: my $post='\vskip 0 mm ';
714: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
715: if ($align eq 'center') {
716: $post='\end{center}';
717: } elsif ($align eq 'left') {
718: $post='} \hfill'.'\vskip 0 mm ';
719: } elsif ($align eq 'right') {
720: $post='}'.'\vskip 0 mm ';
721: }
722: $currentstring .= '}}'.$post;
723: } elsif ($target eq 'meta') {
724: &end_output($target);
725: $currentstring='</subject>';
726: }
727: return $currentstring;
728: }
729:
730: #-- <h2> tag
731: sub start_h2 {
732: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
733: my $currentstring = &end_p(); # Close off any prior para.
734: if ($target eq 'web') {
735: $currentstring .= $token->[4];
736: } elsif ($target eq 'tex') {
737: my $pre;
738: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
739: if ($align eq 'center') {
740: $pre='\begin{center}';
741: } elsif ($align eq 'left') {
742: $pre='\rlap{';
743: } elsif ($align eq 'right') {
744: $pre=' \hfill \llap{';
745: }
746: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
747: if (not defined $TeXsize) {$TeXsize="large";}
748: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
749: }
750: return $currentstring;
751: }
752:
753: sub end_h2 {
754: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
755: my $currentstring = '';
756: if ($target eq 'web') {
757: $currentstring .= $token->[2];
758: } elsif ($target eq 'tex') {
759: my $post='\vskip 0 mm ';
760: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
761: if ($align eq 'center') {
762: $post='\end{center}';
763: } elsif ($align eq 'left') {
764: $post='} \hfill'.'\vskip 0 mm ';
765: } elsif ($align eq 'right') {
766: $post='}'.'\vskip 0 mm ';
767: }
768: $currentstring .= '}}'.$post;
769: }
770: return $currentstring;
771: }
772:
773: #-- <h3> tag
774: sub start_h3 {
775: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
776: my $currentstring = &end_p(); # Close off any prior para.
777: if ($target eq 'web') {
778: $currentstring .= $token->[4];
779: } elsif ($target eq 'tex') {
780: my $pre;
781: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
782: if ($align eq 'center') {
783: $pre='\begin{center}';
784: } elsif ($align eq 'left') {
785: $pre='\rlap{';
786: } elsif ($align eq 'right') {
787: $pre=' \hfill \llap{';
788: }
789: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
790: if (not defined $TeXsize) {$TeXsize="large";}
791: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
792: }
793: return $currentstring;
794: }
795:
796: sub end_h3 {
797: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
798: my $currentstring = '';
799: if ($target eq 'web') {
800: $currentstring .= $token->[2];
801: } elsif ($target eq 'tex') {
802: my $post='\vskip 0 mm ';
803: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
804: if ($align eq 'center') {
805: $post='\end{center}';
806: } elsif ($align eq 'left') {
807: $post='} \hfill'.'\vskip 0 mm ';
808: } elsif ($align eq 'right') {
809: $post='}'.'\vskip 0 mm ';
810: }
811: $currentstring .= '}}'.$post;
812: }
813: return $currentstring;
814: }
815:
816: #-- <h4> tag
817: sub start_h4 {
818: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
819: my $currentstring = &end_p(); # Close off any prior para.
820: if ($target eq 'web') {
821: $currentstring .= $token->[4];
822: } elsif ($target eq 'tex') {
823: my $pre;
824: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
825: if ($align eq 'center') {
826: $pre='\begin{center}';
827: } elsif ($align eq 'left') {
828: $pre='\rlap{';
829: } elsif ($align eq 'right') {
830: $pre=' \hfill \llap{';
831: }
832: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
833: if (not defined $TeXsize) {$TeXsize="large";}
834: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
835: }
836: return $currentstring;
837: }
838:
839: sub end_h4 {
840: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
841: my $currentstring = '';
842: if ($target eq 'web') {
843: $currentstring .= $token->[2];
844: } elsif ($target eq 'tex') {
845: my $post='\vskip 0 mm ';
846: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
847: if ($align eq 'center') {
848: $post='\end{center}';
849: } elsif ($align eq 'left') {
850: $post='} \hfill'.'\vskip 0 mm ';
851: } elsif ($align eq 'right') {
852: $post='}'.'\vskip 0 mm ';
853: }
854: $currentstring .= '}}'.$post;
855: }
856: return $currentstring;
857: }
858:
859: #-- <h5> tag
860: sub start_h5 {
861: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
862: my $currentstring = &end_p(); # Close off any prior paras.
863: if ($target eq 'web') {
864: $currentstring .= $token->[4];
865: } elsif ($target eq 'tex') {
866: my $pre;
867: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
868: if ($align eq 'center') {
869: $pre='\begin{center}';
870: } elsif ($align eq 'left') {
871: $pre='\rlap{';
872: } elsif ($align eq 'right') {
873: $pre=' \hfill \llap{';
874: }
875: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
876: if (not defined $TeXsize) {$TeXsize="large";}
877: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
878: }
879: return $currentstring;
880: }
881:
882: sub end_h5 {
883: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
884: my $currentstring = '';
885: if ($target eq 'web') {
886: $currentstring .= $token->[2];
887: } elsif ($target eq 'tex') {
888: my $post='\vskip 0 mm ';
889: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
890: if ($align eq 'center') {
891: $post='\end{center}';
892: } elsif ($align eq 'left') {
893: $post='} \hfill'.'\vskip 0 mm ';
894: } elsif ($align eq 'right') {
895: $post='}'.'\vskip 0 mm ';
896: }
897: $currentstring .= '}}'.$post;
898: }
899: return $currentstring;
900: }
901:
902: #-- <h6> tag
903: sub start_h6 {
904: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
905: my $currentstring = &end_p(); # Close off any prior paras.
906: if ($target eq 'web') {
907: $currentstring .= $token->[4];
908: } elsif ($target eq 'tex') {
909: my $pre;
910: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
911: if ($align eq 'center') {
912: $pre='\begin{center}';
913: } elsif ($align eq 'left') {
914: $pre='\rlap{';
915: } elsif ($align eq 'right') {
916: $pre=' \hfill \llap{';
917: }
918: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
919: if (not defined $TeXsize) {$TeXsize="large";}
920: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
921: }
922: return $currentstring;
923: }
924:
925: sub end_h6 {
926: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
927: my $currentstring = '';
928: if ($target eq 'web') {
929: $currentstring .= $token->[2];
930: } elsif ($target eq 'tex') {
931: my $post='\vskip 0 mm ';
932: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
933: if ($align eq 'center') {
934: $post='\end{center}';
935: } elsif ($align eq 'left') {
936: $post='} \hfill'.'\vskip 0 mm ';
937: } elsif ($align eq 'right') {
938: $post='}'.'\vskip 0 mm ';
939: }
940: $currentstring .= '}}'.$post;
941: }
942: return $currentstring;
943: }
944:
945: #--- <cite> tag (end tag required)
946: sub start_cite {
947: my ($target,$token) = @_;
948: my $currentstring = '';
949: if ($target eq 'web') {
950: $currentstring .= $token->[4];
951: } elsif ($target eq 'tex') {
952: $currentstring .= '\textit{';
953: }
954: return $currentstring;
955: }
956:
957: sub end_cite {
958: my ($target,$token) = @_;
959: my $currentstring = '';
960: if ($target eq 'web') {
961: $currentstring .= $token->[2];
962: } elsif ($target eq 'tex') {
963: $currentstring .= '}';
964: }
965: return $currentstring;
966: }
967:
968: #-- <i> tag (end tag required)
969: sub start_i {
970: my ($target,$token) = @_;
971: my $currentstring = '';
972: if ($target eq 'web') {
973: $currentstring .= $token->[4];
974: } elsif ($target eq 'tex') {
975: $currentstring .= '\textit{';
976: }
977: return $currentstring;
978: }
979:
980: sub end_i {
981: my ($target,$token) = @_;
982: my $currentstring = '';
983: if ($target eq 'web') {
984: $currentstring .= $token->[2];
985: } elsif ($target eq 'tex') {
986: $currentstring .= '}';
987: }
988: return $currentstring;
989: }
990:
991: #-- <address> tag (end tag required)
992: sub start_address {
993: my ($target,$token) = @_;
994: my $currentstring = '';
995: if ($target eq 'web') {
996: $currentstring .= $token->[4];
997: } elsif ($target eq 'tex') {
998: $currentstring .= '\textit{';
999: }
1000: return $currentstring;
1001: }
1002:
1003: sub end_address {
1004: my ($target,$token) = @_;
1005: my $currentstring = '';
1006: if ($target eq 'web') {
1007: $currentstring .= $token->[2];
1008: } elsif ($target eq 'tex') {
1009: $currentstring .= '}';
1010: }
1011: return $currentstring;
1012: }
1013:
1014: #-- <dfn> tag (end tag required)
1015: sub start_dfn {
1016: my ($target,$token) = @_;
1017: my $currentstring = '';
1018: if ($target eq 'web') {
1019: $currentstring .= $token->[4];
1020: } elsif ($target eq 'tex') {
1021: $currentstring .= '\textit{';
1022: }
1023: return $currentstring;
1024: }
1025:
1026: sub end_dfn {
1027: my ($target,$token) = @_;
1028: my $currentstring = '';
1029: if ($target eq 'web') {
1030: $currentstring .= $token->[2];
1031: } elsif ($target eq 'tex') {
1032: $currentstring .= '}';
1033: }
1034: return $currentstring;
1035: }
1036:
1037: #-- <tt> tag (end tag required)
1038: sub start_tt {
1039: my ($target,$token) = @_;
1040: my $currentstring = '';
1041: if ($target eq 'web') {
1042: $currentstring .= $token->[4];
1043: } elsif ($target eq 'tex') {
1044: $currentstring .= '\texttt{';
1045: }
1046: return $currentstring;
1047: }
1048:
1049: sub end_tt {
1050: my ($target,$token) = @_;
1051: my $currentstring = '';
1052: if ($target eq 'web') {
1053: $currentstring .= $token->[2];
1054: } elsif ($target eq 'tex') {
1055: $currentstring .= '}';
1056: }
1057: return $currentstring;
1058: }
1059:
1060: #-- <kbd> tag (end tag required)
1061: sub start_kbd {
1062: my ($target,$token) = @_;
1063: my $currentstring = '';
1064: if ($target eq 'web') {
1065: $currentstring .= $token->[4];
1066: } elsif ($target eq 'tex') {
1067: $currentstring .= '\texttt{';
1068: }
1069: return $currentstring;
1070: }
1071:
1072: sub end_kbd {
1073: my ($target,$token) = @_;
1074: my $currentstring = '';
1075: if ($target eq 'web') {
1076: $currentstring .= $token->[2];
1077: } elsif ($target eq 'tex') {
1078: $currentstring .= '}';
1079: }
1080: return $currentstring;
1081: }
1082:
1083: #-- <code> tag (end tag required)
1084: sub start_code {
1085: my ($target,$token) = @_;
1086: my $currentstring = '';
1087: if ($target eq 'web') {
1088: $currentstring .= $token->[4];
1089: } elsif ($target eq 'tex') {
1090: $currentstring .= '\texttt{';
1091: }
1092: return $currentstring;
1093: }
1094:
1095: sub end_code {
1096: my ($target,$token) = @_;
1097: my $currentstring = '';
1098: if ($target eq 'web') {
1099: $currentstring .= $token->[2];
1100: } elsif ($target eq 'tex') {
1101: $currentstring .= '}';
1102: }
1103: return $currentstring;
1104: }
1105:
1106: #-- <em> tag (end tag required)
1107: sub start_em {
1108: my ($target,$token) = @_;
1109: my $currentstring = '';
1110: if ($target eq 'web') {
1111: $currentstring .= $token->[4];
1112: } elsif ($target eq 'tex') {
1113: $currentstring .= '\emph{';
1114: }
1115: return $currentstring;
1116: }
1117:
1118: sub end_em {
1119: my ($target,$token) = @_;
1120: my $currentstring = '';
1121: if ($target eq 'web') {
1122: $currentstring .= $token->[2];
1123: } elsif ($target eq 'tex') {
1124: $currentstring .= '}';
1125: }
1126: return $currentstring;
1127: }
1128:
1129: #-- <q> tag (end tag required)
1130: sub start_q {
1131: my ($target,$token) = @_;
1132: my $currentstring = '';
1133: if ($target eq 'web') {
1134: $currentstring .= $token->[4];
1135: } elsif ($target eq 'tex') {
1136: $currentstring .= '\emph{';
1137: }
1138: return $currentstring;
1139: }
1140:
1141: sub end_q {
1142: my ($target,$token) = @_;
1143: my $currentstring = '';
1144: if ($target eq 'web') {
1145: $currentstring .= $token->[2];
1146: } elsif ($target eq 'tex') {
1147: $currentstring .= '}';
1148: }
1149: return $currentstring;
1150: }
1151:
1152: # <p> is a bit strange since it does not require a closing </p>
1153: # However in latex, we must often output closing stuff to end
1154: # environments and {}'s etc. Therefore we do all the work
1155: # of figuring out the ending strings in the start tag processing,
1156: # and provide a mechanism to output the stop text external
1157: # to tag processing.
1158: #
1159: {
1160:
1161: my $closing_string = ''; # String required to close <p>
1162:
1163: # Some tags are <p> fragile meaning that <p> inside of them
1164: # does not work within TeX mode. This is managed via the
1165: # counter below:
1166: #
1167:
1168: my $para_disabled = 0;
1169:
1170: sub disable_para {
1171: $para_disabled++;
1172: }
1173: sub enable_para {
1174: $para_disabled--;
1175: }
1176:
1177:
1178: #-- <p> tag (end tag optional)
1179: #optional attribute - align="center|left|right"
1180: sub start_p {
1181: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1182: my $currentstring = '';
1183: if ($target eq 'web') {
1184: $currentstring .= &end_p(); # close off prior para if in progress.
1185: $currentstring .= $token->[4];
1186: if (! ($currentstring =~ /\//)) {
1187: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1188: }
1189: } elsif ($target eq 'tex' && !$para_disabled) {
1190: $currentstring .= &end_p(); # close off prior para if in progress.
1191: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1192: if ($align eq 'center') {
1193: $currentstring .='\begin{center}\par';
1194: $closing_string = '\end{center}';
1195: if (&is_inside_of($tagstack, "table")) {
1196: $currentstring = ¢er_correction().$currentstring;
1197: #$closing_string .= ¢er_correction();
1198: }
1199: } elsif ($align eq 'right') {
1200: $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1201: $closing_string= '}}';
1202: } elsif ($align eq 'left') {
1203: $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
1204: $closing_string = '}\hfill}';
1205: } else {
1206: $currentstring.='\par ';
1207: $closing_string = '\strut\\\\\strut ';
1208: }
1209:
1210: }
1211: return $currentstring;
1212: }
1213: #
1214: # End paragraph processing just requires that we output the
1215: # closing string that was saved and blank it.
1216: sub end_p {
1217: # Note only 'tex' mode uses disable_para and enable_para
1218: # so we don't need to know the target in the check below:
1219:
1220: if (!$para_disabled) {
1221: my $current_string = $closing_string;
1222: $closing_string = ''; # Not in a para anymore.
1223: return $current_string;
1224: } else {
1225: return '';
1226: }
1227:
1228: }
1229: }
1230: #-- <br> tag (end tag forbidden)
1231: sub start_br {
1232: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1233: my $currentstring = '';
1234: if ($target eq 'web') {
1235: $currentstring .= $token->[4];
1236: } elsif ($target eq 'tex') {
1237: my @tempo=@$tagstack;
1238: my $signal=0;
1239: # Not going to factor this to is_inside_of since that would require
1240: # multiple stack traversals.
1241: #
1242: for (my $i=$#tempo;$i>=0;$i--) {
1243: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1244: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1245: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1246: $signal=1;
1247: last;
1248: }
1249: }
1250: if ($signal) {
1251: $currentstring .= ' \vskip 0 mm ';
1252: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1253: $currentstring .= '\strut \\\\ \strut ';
1254: }
1255: }
1256: return $currentstring;
1257: }
1258:
1259: sub end_br {
1260: my ($target,$token) = @_;
1261: my $currentstring = '';
1262: if ($target eq 'web') {
1263: $currentstring .= $token->[2];
1264: }
1265: return $currentstring;
1266: }
1267:
1268: #-- <big> tag (end tag required)
1269: sub start_big {
1270: my ($target,$token) = @_;
1271: my $currentstring = '';
1272: if ($target eq 'web') {
1273: $currentstring .= $token->[4];
1274: } elsif ($target eq 'tex') {
1275: $currentstring .= '{\large ';
1276: }
1277: return $currentstring;
1278: }
1279:
1280: sub end_big {
1281: my ($target,$token) = @_;
1282: my $currentstring = '';
1283: if ($target eq 'web') {
1284: $currentstring .= $token->[2];
1285: } elsif ($target eq 'tex') {
1286: $currentstring .= '}';
1287: }
1288: return $currentstring;
1289: }
1290:
1291: #-- <small> tag (end tag required)
1292: sub start_small {
1293: my ($target,$token) = @_;
1294: my $currentstring = '';
1295: if ($target eq 'web') {
1296: $currentstring .= $token->[4];
1297: } elsif ($target eq 'tex') {
1298: $currentstring .= '{\footnotesize ';
1299: }
1300: return $currentstring;
1301: }
1302:
1303: sub end_small {
1304: my ($target,$token) = @_;
1305: my $currentstring = '';
1306: if ($target eq 'web') {
1307: $currentstring .= $token->[2];
1308: } elsif ($target eq 'tex') {
1309: $currentstring .= '}';
1310: }
1311: return $currentstring;
1312: }
1313:
1314: #-- <basefont> tag (end tag forbidden)
1315: sub start_basefont {
1316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1317: my $currentstring = '';
1318: if ($target eq 'web') {
1319: $currentstring = $token->[4];
1320: } elsif ($target eq 'tex') {
1321: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1322: if (defined $basesize) {
1323: $currentstring = '{\\'.$basesize.' ';
1324: }
1325: }
1326: return $currentstring;
1327: }
1328:
1329: sub end_basefont {
1330: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1331: my $currentstring = '';
1332: if ($target eq 'web') {
1333: $currentstring = $token->[4];
1334: } elsif ($target eq 'tex') {
1335: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1336: if (defined $basesize) {
1337: $currentstring = '}';
1338: }
1339: }
1340: return $currentstring;
1341: }
1342:
1343: #-- <font> tag (end tag required)
1344: sub start_font {
1345: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1346: my $currentstring = '';
1347: if ($target eq 'web') {
1348: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1349: if ($face!~/symbol/i) {
1350: if (($env{'browser.fontenhance'} eq 'on') ||
1351: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1352: }
1353: $currentstring = $token->[4];
1354: } elsif ($target eq 'tex') {
1355: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1356: if (defined $fontsize) {
1357: $currentstring = '{\\'.$fontsize.' ';
1358: }
1359: }
1360: return $currentstring;
1361: }
1362:
1363: sub end_font {
1364: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1365: my $currentstring = '';
1366: if ($target eq 'web') {
1367: $currentstring = $token->[2];
1368: } elsif ($target eq 'tex') {
1369: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1370: if (defined $fontsize) {
1371: $currentstring = '}';
1372: }
1373: }
1374: return $currentstring;
1375: }
1376:
1377: #-- <strike> tag (end tag required)
1378: sub start_strike {
1379: my ($target,$token) = @_;
1380: my $currentstring = '';
1381: if ($target eq 'web') {
1382: $currentstring .= $token->[4];
1383: } elsif ($target eq 'tex') {
1384: &Apache::lonxml::startredirection();
1385: }
1386: return $currentstring;
1387: }
1388:
1389: sub end_strike {
1390: my ($target,$token) = @_;
1391: my $currentstring = '';
1392: if ($target eq 'web') {
1393: $currentstring .= $token->[2];
1394: } elsif ($target eq 'tex') {
1395: $currentstring=&Apache::lonxml::endredirection();
1396: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1397: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1398: $currentstring=~s/(\S)\s*$/$1\}/;
1399: }
1400: return $currentstring;
1401: }
1402:
1403: #-- <s> tag (end tag required)
1404: sub start_s {
1405: my ($target,$token) = @_;
1406: my $currentstring = '';
1407: if ($target eq 'web') {
1408: $currentstring .= $token->[4];
1409: } elsif ($target eq 'tex') {
1410: &Apache::lonxml::startredirection();
1411: }
1412: return $currentstring;
1413: }
1414:
1415: sub end_s {
1416: my ($target,$token) = @_;
1417: my $currentstring = '';
1418: if ($target eq 'web') {
1419: $currentstring .= $token->[2];
1420: } elsif ($target eq 'tex') {
1421: $currentstring=&Apache::lonxml::endredirection();
1422: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1423: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1424: $currentstring=~s/(\S)\s*$/$1\}/;
1425: }
1426: return $currentstring;
1427: }
1428:
1429: #-- <sub> tag (end tag required)
1430: sub start_sub {
1431: my ($target,$token) = @_;
1432: my $currentstring = '';
1433: if ($target eq 'web') {
1434: $currentstring .= $token->[4];
1435: } elsif ($target eq 'tex') {
1436: $currentstring .= '\ensuremath{_{';
1437: }
1438: return $currentstring;
1439: }
1440:
1441: sub end_sub {
1442: my ($target,$token) = @_;
1443: my $currentstring = '';
1444: if ($target eq 'web') {
1445: $currentstring .= $token->[2];
1446: } elsif ($target eq 'tex') {
1447: $currentstring .= '}}';
1448: }
1449: return $currentstring;
1450: }
1451:
1452: #-- <sup> tag (end tag required)
1453: sub start_sup {
1454: my ($target,$token) = @_;
1455: my $currentstring = '';
1456: if ($target eq 'web') {
1457: $currentstring .= $token->[4];
1458: } elsif ($target eq 'tex') {
1459: $currentstring .= '\ensuremath{^{';
1460: }
1461: return $currentstring;
1462: }
1463:
1464: sub end_sup {
1465: my ($target,$token) = @_;
1466: my $currentstring = '';
1467: if ($target eq 'web') {
1468: $currentstring .= $token->[2];
1469: } elsif ($target eq 'tex') {
1470: $currentstring .= '}}';
1471: }
1472: return $currentstring;
1473: }
1474:
1475: #-- <hr> tag (end tag forbidden)
1476: sub start_hr {
1477: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1478: my $currentstring = &end_p(); # End enclosing para.
1479: if ($target eq 'web') {
1480: $currentstring .= $token->[4];
1481: } elsif ($target eq 'tex') {
1482: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1483: if (defined $LaTeXwidth) {
1484: if ($LaTeXwidth=~/^%/) {
1485: substr($LaTeXwidth,0,1)='';
1486: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1487: }
1488: } else {
1489: $LaTeXwidth ='0.9\textwidth';
1490: }
1491: my ($pre,$post);
1492: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1493: if (($align eq 'center') || (not defined $align)) {
1494: $pre=''; $post='';
1495: } elsif ($align eq 'left') {
1496: $pre='\rlap{'; $post='} \hfill';
1497: } elsif ($align eq 'right') {
1498: $pre=' \hfill \llap{'; $post='}';
1499: }
1500: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1501: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1502: }
1503: return $currentstring;
1504: }
1505:
1506: sub end_hr {
1507: my ($target,$token) = @_;
1508: my $currentstring = '';
1509: if ($target eq 'web') {
1510: $currentstring .= $token->[2];
1511: }
1512: return $currentstring;
1513: }
1514:
1515: #-- <div> tag (end tag required)
1516: {
1517:
1518: # Since div can be nested, the stack below is used
1519: # in 'tex' mode to store the ending strings
1520: # for the div stack.
1521:
1522: my @div_end_stack;
1523:
1524: sub start_div {
1525: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1526: my $currentstring = &end_p(); # Close enclosing para.
1527: if ($target eq 'web') {
1528: $currentstring .= $token->[4];
1529: }
1530: if ($target eq 'tex') {
1531: # 4 possible alignments: left, right, center, and -missing-.
1532:
1533: my $endstring = '';
1534:
1535: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1536: $safeeval, undef, 1));
1537: if ($align eq 'center') {
1538: $currentstring .= '\begin{center}';
1539: $endstring = '\end{center}';
1540: if (&is_inside_of($tagstack, "table")) {
1541: $currentstring = ¢er_correction().$currentstring;
1542: #$endstring .= ¢er_correction();
1543: }
1544: }
1545: elsif ($align eq 'right') {
1546: $currentstring .= '\begin{flushright}';
1547: $endstring .= '\end{flushright}';
1548: } elsif ($align eq 'left') {
1549: $currentstring .= '\begin{flushleft}';
1550: $endstring = '\end{flushleft}';
1551: } else {
1552:
1553: }
1554: $currentstring .= "\n"; # For human readability.
1555: $endstring = "\n$endstring\n"; # For human readability
1556: push(@div_end_stack, $endstring);
1557: }
1558: return $currentstring;
1559: }
1560:
1561: sub end_div {
1562: my ($target,$token) = @_;
1563: my $currentstring = '';
1564: if ($target eq 'web') {
1565: $currentstring .= $token->[2];
1566: }
1567: if ($target eq 'tex') {
1568: my $endstring = pop @div_end_stack;
1569: $currentstring .= $endstring;
1570: }
1571: return $currentstring;
1572: }
1573: }
1574:
1575: #-- <a> tag (end tag required)
1576: sub start_a {
1577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1578: my $currentstring = '';
1579: if ($target eq 'web') {
1580: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1581: undef,1);
1582: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1583: } elsif ($target eq 'tex') {
1584: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1585: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1586: if ($a=~/\S/) {
1587: $a=~s/([^\\])%/$1\\\%/g;
1588: $currentstring .= '\ref{URI: '.$a.'}';
1589: } elsif ($b=~/\S/) {
1590: $currentstring .= '\ref{Anchor: '.$b.'}';
1591: } else {
1592: $currentstring.='';
1593: }
1594: }
1595: return $currentstring;
1596: }
1597:
1598: sub end_a {
1599: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1600: my $currentstring = '';
1601: if ($target eq 'web') {
1602: $currentstring .= $token->[2];
1603: }
1604: return $currentstring;
1605: }
1606:
1607: #-- <li> tag (end tag optional)
1608: sub start_li {
1609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1610: my $currentstring = '';
1611: if ($target eq 'web') {
1612: $currentstring = $token->[4];
1613: } elsif ($target eq 'tex') {
1614: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1615: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1616: #FIXME need to support types i and I
1617: if ($type=~/disc/) {
1618: $currentstring .= ' \item[$\bullet$] ';
1619: } elsif ($type=~/circle/) {
1620: $currentstring .= ' \item[$\circ$] ';
1621: } elsif ($type=~/square/) {
1622: $currentstring .= ' \item[$\diamond$] ';
1623: } elsif ($type eq '1') {
1624: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1625: } elsif ($type eq 'A') {
1626: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1627: } elsif ($type eq 'a') {
1628: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1629: } elsif ($value ne '') {
1630: $currentstring .= ' \item['.$value.'] ';
1631: } else {
1632: $currentstring .= ' \item ';
1633: }
1634: $Apache::londefdef::list_index++;
1635: }
1636: return $currentstring;
1637: }
1638:
1639: sub end_li {
1640: my ($target,$token) = @_;
1641: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1642: if ($target eq 'web') {
1643: $currentstring .= $token->[2];
1644: }
1645: return $currentstring;
1646: }
1647:
1648: #-- <u> tag (end tag required)
1649: sub start_u {
1650: my ($target,$token) = @_;
1651: my $currentstring = '';
1652: if ($target eq 'web') {
1653: $currentstring .= $token->[4];
1654: } elsif ($target eq 'tex') {
1655: &Apache::lonxml::startredirection();
1656: }
1657: return $currentstring;
1658: }
1659:
1660: sub end_u {
1661: my ($target,$token) = @_;
1662: my $currentstring = '';
1663: if ($target eq 'web') {
1664: $currentstring .= $token->[2];
1665: } elsif ($target eq 'tex') {
1666: $currentstring=&Apache::lonxml::endredirection();
1667: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1668: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1669: $currentstring=~s/(\S)\s*$/$1\}/;
1670: }
1671: return $currentstring;
1672: }
1673:
1674: #-- <ul> tag (end tag required)
1675: sub start_ul {
1676: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1677: my $currentstring = &end_p(); # Close off enclosing list.
1678: if ($target eq 'web') {
1679: $currentstring .= $token->[4];
1680: } elsif ($target eq 'tex') {
1681: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1682: $Apache::londefdef::list_index=0;
1683: if ($TeXtype eq 'disc') {
1684: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1685: '\renewcommand{\labelitemii}{$\bullet$}'.
1686: '\renewcommand{\labelitemiii}{$\bullet$}'.
1687: '\renewcommand{\labelitemiv}{$\bullet$}';
1688: } elsif ($TeXtype eq 'circle') {
1689: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1690: '\renewcommand{\labelitemii}{$\circ$}'.
1691: '\renewcommand{\labelitemiii}{$\circ$}'.
1692: '\renewcommand{\labelitemiv}{$\circ$}';
1693: } elsif ($TeXtype eq 'square') {
1694: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1695: '\renewcommand{\labelitemii}{$\diamond$}'.
1696: '\renewcommand{\labelitemiii}{$\diamond$}'.
1697: '\renewcommand{\labelitemiv}{$\diamond$}';
1698: }
1699: $currentstring .= '\strut \begin{itemize}';
1700: }
1701: return $currentstring;
1702: }
1703:
1704: sub end_ul {
1705: my ($target,$token) = @_;
1706: my $currentstring = '';
1707: if ($target eq 'web') {
1708: $currentstring = $token->[2];
1709: } elsif ($target eq 'tex') {
1710: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1711: '\renewcommand{\labelitemii}{$\bullet$}'.
1712: '\renewcommand{\labelitemiii}{$\bullet$}'.
1713: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1714: }
1715: return $currentstring;
1716: }
1717:
1718: #-- <menu> tag (end tag required)
1719: sub start_menu {
1720: my ($target,$token) = @_;
1721: my $currentstring = '';
1722: if ($target eq 'web') {
1723: $currentstring = $token->[4];
1724: } elsif ($target eq 'tex') {
1725: $currentstring = " \\begin{itemize} ";
1726: }
1727: return $currentstring;
1728: }
1729:
1730: sub end_menu {
1731: my ($target,$token) = @_;
1732: my $currentstring = '';
1733: if ($target eq 'web') {
1734: $currentstring = $token->[2];
1735: } elsif ($target eq 'tex') {
1736: $currentstring = " \\end{itemize}";
1737: }
1738: return $currentstring;
1739: }
1740:
1741: #-- <dir> tag (end tag required)
1742: sub start_dir {
1743: my ($target,$token) = @_;
1744: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1745: if ($target eq 'web') {
1746: $currentstring .= $token->[4];
1747: } elsif ($target eq 'tex') {
1748: $currentstring .= " \\begin{itemize} ";
1749: }
1750: return $currentstring;
1751: }
1752:
1753: sub end_dir {
1754: my ($target,$token) = @_;
1755: my $currentstring = '';
1756: if ($target eq 'web') {
1757: $currentstring = $token->[2];
1758: } elsif ($target eq 'tex') {
1759: $currentstring = " \\end{itemize}";
1760: }
1761: return $currentstring;
1762: }
1763:
1764: #-- <ol> tag (end tag required)
1765: sub start_ol {
1766: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1767: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1768: if ($target eq 'web') {
1769: $currentstring .= $token->[4];
1770: } elsif ($target eq 'tex') {
1771: $Apache::londefdef::list_index=0;
1772: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1773: if ($type eq '1') {
1774: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1775: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1776: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1777: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1778: } elsif ($type eq 'A') {
1779: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1780: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1781: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1782: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1783: } elsif ($type eq 'a') {
1784: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1785: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1786: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1787: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1788: } elsif ($type eq 'i') {
1789: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1790: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1791: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1792: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1793: } elsif ($type eq 'I') {
1794: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1795: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1796: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1797: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1798: }
1799: $currentstring .= '\strut \begin{enumerate}';
1800: }
1801: return $currentstring;
1802: }
1803:
1804: sub end_ol {
1805: my ($target,$token) = @_;
1806: my $currentstring = '';
1807: if ($target eq 'web') {
1808: $currentstring = $token->[2];
1809: } elsif ($target eq 'tex') {
1810: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1811: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1812: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1813: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1814: }
1815: return $currentstring;
1816: }
1817:
1818: #-- <dl> tag (end tag required)
1819: sub start_dl {
1820: my ($target,$token) = @_;
1821: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1822: if ($target eq 'web') {
1823: $currentstring .= $token->[4];
1824: } elsif ($target eq 'tex') {
1825: $currentstring .= '\begin{description}';
1826: $Apache::londefdef::DL++;
1827: push(@Apache::londefdef::description,[]);
1828: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1829: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1830: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1831: }
1832: return $currentstring;
1833: }
1834:
1835: sub end_dl {
1836: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1837: my $currentstring = '';
1838: if ($target eq 'web') {
1839: $currentstring = $token->[2];
1840: } elsif ($target eq 'tex') {
1841: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1842: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1843: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1844: $currentstring.=' '.$element.' ';
1845: }
1846: pop(@Apache::londefdef::description);
1847: $currentstring.='\end{description}';
1848: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1849: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1850: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1851: $Apache::londefdef::DL--;
1852: }
1853: return $currentstring;
1854: }
1855:
1856: #-- <dt> tag (end tag optional)
1857: sub start_dt {
1858: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1859: my $currentstring='';
1860: if ($target eq 'web') {
1861: $currentstring = $token->[4];
1862: } elsif ($target eq 'tex') {
1863: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1864: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1865: &Apache::lonxml::startredirection();
1866: $Apache::londefdef::DT[-1]++;
1867: $Apache::londefdef::seenDT[-1]=1;
1868: }
1869: return $currentstring;
1870: }
1871:
1872: sub end_dt {
1873: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1874: my $currentstring = '';
1875: if ($target eq 'web') {
1876: $currentstring = $token->[2];
1877: } elsif ($target eq 'tex') {
1878: if ($Apache::londefdef::DT[-1]) {
1879: my $data=&item_cleanup();
1880: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1881: $Apache::londefdef::DT[-1]--;
1882: }
1883: }
1884: return $currentstring;
1885: }
1886:
1887: sub item_cleanup {
1888: my $item=&Apache::lonxml::endredirection();
1889: $item=~s/\\begin{center}//g;
1890: $item=~s/\\end{center}//g;
1891: return $item;
1892: }
1893:
1894: #-- <dd> tag (end tag optional)
1895: sub start_dd {
1896: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1897: my $currentstring = '';
1898: if ($target eq 'web') {
1899: $currentstring = $token->[4];
1900: } elsif ($target eq 'tex') {
1901: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1902: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1903: if (!$Apache::londefdef::seenDT[-1]) {
1904: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1905: }
1906: push(@{$Apache::londefdef::description[-1]},'');
1907: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1908: $Apache::londefdef::DD[-1]++;
1909: &Apache::lonxml::startredirection();
1910: }
1911: return $currentstring;
1912: }
1913:
1914: sub end_dd {
1915: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1916: my $currentstring = '';
1917: if ($target eq 'web') {
1918: $currentstring = $token->[2];
1919: } elsif ($target eq 'tex') {
1920: $Apache::londefdef::description[-1]->[-1].=
1921: &Apache::lonxml::endredirection().' \vskip 0mm ';
1922: $Apache::londefdef::DD[-1]--;
1923: }
1924: return $currentstring;
1925: }
1926:
1927: #-- <table> tag (end tag required)
1928: # <table> also ends any prior <p> that is not closed.
1929: # but, unless I allow <p>'s to nest, that's the
1930: # only way I could think of to allow <p> in
1931: # <tr> <th> bodies
1932: #
1933: #list of supported attributes: border,width,TeXwidth
1934: sub start_table {
1935: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1936: my $textwidth = '';
1937: my $currentstring = &end_p();
1938: if ($target eq 'web') {
1939: $currentstring .= $token->[4];
1940: } elsif ($target eq 'tex') {
1941: my $aa = {};
1942: push @Apache::londefdef::table, $aa;
1943: $Apache::londefdef::table[-1]{'row_number'} = -1;
1944: #maximum table's width (default coincides with text line length)
1945: if ($#Apache::londefdef::table==0) {
1946: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1947: $textwidth=~/(\d+\.?\d*)/;
1948: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1949: } else {
1950: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1951: #the maximum width of nested table is determined by LATeX width of parent cell
1952: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1953: } else {
1954: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1955: $textwidth=$Apache::londefdef::table[-2]{'width'};
1956: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1957: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1958: }
1959: }
1960: }
1961:
1962: # width either comes forced from the TeXwidth or the width parameters.
1963: # in either case it can be a percentage or absolute width.
1964: # in the width case we ignore absolute width
1965: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1966: if (!defined($TeXwidth)) {
1967: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1968: $safeeval,undef,1);
1969: if ($htmlwidth =~ /%/) {
1970: $TeXwidth = $htmlwidth;
1971: } else {
1972: $TeXwidth = $textwidth;
1973: }
1974: } else {
1975: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1976: }
1977: if ($TeXwidth=~/%/) {
1978: $Apache::londefdef::table[-1]{'percent'}=1;
1979: $TeXwidth=~/(\d+)/;
1980: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1981: } else {
1982: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1983: }
1984:
1985: #table's border
1986: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1987: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1988: unless (defined $border) { $border = 0; }
1989: if ($border) {
1990: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1991: $Apache::londefdef::table[-1]{'vinc'} = '&';
1992: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1993: } else {
1994: $Apache::londefdef::table[-1]{'hinc'} = '';
1995: $Apache::londefdef::table[-1]{'vinc'} = '&';
1996: $Apache::londefdef::table[-1]{'vvinc'} = '';
1997: }
1998: if ($#Apache::londefdef::table==0) {
1999: # Note that \newline seems to destroy the alignment envs.
2000: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2001: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2002: }
2003: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2004: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2005: $Apache::londefdef::table[-1]{'objectlen'}=[];
2006: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2007: $Apache::londefdef::table[-1]{'maxlen'}=[];
2008: $Apache::londefdef::table[-1]{'minlen'}=[];
2009: $Apache::londefdef::table[-1]{'content'}=[];
2010: $Apache::londefdef::table[-1]{'align'}=[];
2011: $currentstring.='\keephidden{NEW TABLE ENTRY}';
2012:
2013:
2014: }
2015: return $currentstring;
2016: }
2017:
2018: sub end_table {
2019: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2020: my $currentstring = '';
2021: if ($target eq 'web') {
2022: $currentstring = $token->[2];
2023: } elsif ($target eq 'tex') {
2024: my $inmemory = '';
2025: my $output = '';
2026: my $WARNING='';
2027: #width of columns from TeXwidth attributes
2028:
2029: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2030: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2031: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2032: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2033: }
2034: }
2035: }
2036: #free space and number of empty columns
2037: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2038: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2039: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2040: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2041: $empty_columns++;
2042: } else {
2043: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2044: }
2045: }
2046: #boundaries for contents columns
2047: my @min_len=();#columns can not be narrower
2048: my @max_len=();#maximum length of column
2049: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2050: my ($localmin,$localmax)=(0,0);
2051: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2052: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2053: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2054: }
2055: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2056: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2057: }
2058: }
2059: push @min_len, $localmin;
2060: push @max_len, $localmax;
2061: }
2062: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2063: my $localmin=0,;
2064: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2065: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2066: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2067: }
2068: }
2069: if ($max_len[$jn]<$localmin) {
2070: $max_len[$jn]=$localmin;
2071: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2072: }#object size is bigger
2073: if ($min_len[$jn]<$localmin) {
2074: $min_len[$jn]=$localmin;
2075: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2076: }#object size is bigger
2077: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2078: $min_len[$jn]=0;
2079: $max_len[$jn]=0;
2080: }
2081: }
2082: #final adjustment of column width
2083: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2084: my @adjust=();
2085: #step 1. adjustment by maximum value
2086: my $space_neeeded=0;
2087: for (my $jn=0;$jn<=$#max_len;$jn++) {
2088: $space_neeeded=$space_neeeded+$max_len[$jn];
2089: }
2090: if ($space_neeeded<=$available_space) {
2091: for (my $jn=0;$jn<=$#max_len;$jn++) {
2092: if ($fwidth[$jn]==0) {
2093: $fwidth[$jn]=$max_len[$jn];
2094: }
2095: }
2096: } else {
2097: #step 2. adjustment by minimum value (estimation)
2098: $space_neeeded=0;
2099: for (my $jn=0;$jn<=$#min_len;$jn++) {
2100: $space_neeeded+=$min_len[$jn];
2101: }
2102: if ($space_neeeded>$available_space) {
2103: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2104: for (my $jn=0;$jn<=$#max_len;$jn++) {
2105: if ($fwidth[$jn]==0) {
2106: $fwidth[$jn]=$min_len[$jn];
2107: }
2108: }
2109: #check if we have objects which can be scaled
2110: my $how_many_to_scale=0;
2111: my @to_scale=();
2112: for (my $jn=0;$jn<=$#max_len;$jn++) {
2113: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2114: $how_many_to_scale++;
2115: push @to_scale, $jn;
2116: }
2117: }
2118: if ($how_many_to_scale>0) {
2119: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2120: foreach my $jn (@to_scale) {
2121: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2122: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2123: if ($1 ne '') {
2124: my $current_length=&recalc($1);
2125: $current_length=~/(\d+\.?\d*)/;
2126: $current_length=$current_length-$space_to_adjust;
2127: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2128: }
2129: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2130: if ($1 ne '') {
2131: my $current_length=$1;
2132: $current_length=$current_length-$space_to_adjust;
2133: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2134: }
2135: }
2136: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2137: }
2138: }
2139: } else {
2140: #step 3. adjustment over minimal + corrections
2141: my $enlarge_coef=$available_space/$space_neeeded;
2142: my $acsessive=0;
2143: for (my $jn=0;$jn<=$#min_len;$jn++) {
2144: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2145: if ($adjust[$jn]>$max_len[$jn]) {
2146: $fwidth[$jn]=$max_len[$jn];
2147: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2148: $adjust[$jn]=0;
2149: }
2150: }
2151: if ($acsessive>0) {
2152: #we have an excess of space and can redistribute it
2153: my $notempty_columns=0;
2154: for (my $jn=0;$jn<=$#min_len;$jn++) {
2155: if ($adjust[$jn]!=0) {
2156: $notempty_columns++;
2157: }
2158: }
2159: my $per_column=$acsessive/$notempty_columns;
2160: for (my $jn=0;$jn<=$#min_len;$jn++) {
2161: if ($adjust[$jn]!=0) {
2162: $adjust[$jn]+=$per_column;
2163: $fwidth[$jn]=$adjust[$jn];
2164: }
2165: }
2166: } else {
2167: for (my $jn=0;$jn<=$#min_len;$jn++) {
2168: $fwidth[$jn]=$adjust[$jn];
2169: }
2170: }
2171: }
2172: }
2173: #use all available width if it is defined in % or as TeXwidth
2174: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2175: my $current=0;
2176: for (my $i=0;$i<=$#fwidth;$i++) {
2177: $current+=$fwidth[$i];
2178: }
2179: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2180: for (my $i=0;$i<=$#fwidth;$i++) {
2181: $fwidth[$i]*=$coef;
2182: }
2183: }
2184: #removing of empty columns if allowed
2185: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2186: if ($permission eq 'yes') {
2187: my @cleaned_table=();
2188: my @cleaned_header=();
2189: my $colind=0;
2190: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2191: if ($fwidth[$jn]!=0) {
2192: #we need to copy column
2193: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2194: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2195: $cleaned_header[$colind]=$fwidth[$jn];
2196: }
2197: $colind++;
2198: }
2199: }
2200: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2201: @fwidth=@cleaned_header;
2202: }
2203: #construct header of the table
2204: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2205: for (my $in=0;$in<=$#fwidth;$in++) {
2206: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2207: }
2208: $header_of_table .= '}';
2209: #fill the table
2210: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2211: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2212: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2213: $output.=¢er_correction().'\begin{center}';
2214: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2215: $output.=' \hfill \llap{'
2216: }
2217: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2218: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2219: $output.='\end{center}';#.¢er_correction();
2220: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2221: $output.='} ';
2222: }
2223: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2224: }
2225: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2226: }
2227: # Note that \newline destroys alignment env's produced by e.g. <div>
2228: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2229: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2230: if ($#Apache::londefdef::table > 0) {
2231: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2232: # Figure out max/and min width by summing us and then
2233: # apply that to the current column of the table we nest in
2234: # if it's larger than the current width or the current width
2235: # is undefined.
2236: #
2237: my $min_nested_width = 0;
2238: my $max_nested_width = 0;
2239: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2240: $min_nested_width += $min_len[$col];
2241: $max_nested_width += $max_len[$col];
2242:
2243: }
2244: # Fudge in an extra 5 mm for borders etc:
2245:
2246: $min_nested_width += 5;
2247: $max_nested_width += 5;
2248:
2249: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2250: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2251: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2252: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2253: }
2254: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2255: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2256: }
2257:
2258: pop @Apache::londefdef::table;
2259: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2260: } else {
2261: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2262: pop @Apache::londefdef::table;
2263: undef @Apache::londefdef::table;
2264: }
2265: }
2266: return $currentstring;
2267: }
2268:
2269: #-- <tr> tag (end tag optional)
2270: sub start_tr {
2271: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2272: my $currentstring = '';
2273: if ($target eq 'web') {
2274: $currentstring = $token->[4];
2275: } elsif ($target eq 'tex') {
2276: $Apache::londefdef::table[-1]{'row_number'}++;
2277: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2278: if ($alignchar ne '') {
2279: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2280: } else {
2281: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2282: }
2283: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2284: #
2285: # Need to save the number of table columns to preserve the max # columns.
2286: #
2287: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2288: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2289: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2290: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2291: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2292: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2293: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2294: }
2295: return $currentstring;
2296: }
2297:
2298: sub end_tr {
2299: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2300: my $currentstring = &end_p(); # Close any pending <p> in the row.
2301: if ($target eq 'web') {
2302: $currentstring .= $token->[2];
2303: } elsif ($target eq 'tex') {
2304: if ($Apache::londefdef::TD_redirection) {
2305: &end_td_tex($parstack,$parser,$safeeval);
2306: }
2307: # Counter columns must be the maximum number of columns seen
2308: # in the table so far so:
2309: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2310: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2311: }
2312:
2313:
2314:
2315: }
2316: return $currentstring;
2317: }
2318:
2319: #-- <td> tag (end tag optional)
2320: sub start_td {
2321: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2322: my $currentstring = '';
2323: if ($target eq 'web') {
2324: $currentstring = $token->[4];
2325: } elsif ($target eq 'tex') {
2326: $Apache::londefdef::TD_redirection = 1;
2327: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2328: }
2329: return $currentstring;
2330: }
2331:
2332: sub tag_check {
2333: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2334: my @ar=@$parstack;
2335: for (my $i=$#ar-1;$i>=0;$i--) {
2336: if (lc($$tagstack[$i]) eq $good_tag) {
2337: &start_td_tex($parstack,$parser,$safeeval);
2338: last;
2339: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2340: splice @ar, $i+1;
2341: &end_td_tex(\@ar,$parser,$safeeval);
2342: &start_td_tex($parstack,$parser,$safeeval);
2343: last;
2344: }
2345: }
2346: return '';
2347: }
2348:
2349: sub start_td_tex {
2350: my ($parstack,$parser,$safeeval) = @_;
2351: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2352: if ($alignchar eq '') {
2353: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2354: }
2355: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2356: $Apache::londefdef::table[-1]{'counter_columns'}++;
2357: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2358: if (defined $TeXwidth) {
2359: my $current_length=&recalc($TeXwidth);
2360: $current_length=~/(\d+\.?\d*)/;
2361: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2362: }
2363: &Apache::lonxml::startredirection();
2364: return '';
2365: }
2366:
2367: sub end_td_tex {
2368: my ($parstack,$parser,$safeeval) = @_;
2369: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2370: my $data=&Apache::lonxml::endredirection();
2371: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2372: if (defined $TeXwidth) {
2373: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2374: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2375: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2376: } else {
2377: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2378: my $garbage_data=$data;
2379: my $fwidth=0;
2380: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2381: my $current_length=&recalc($1);
2382: $current_length=~/(\d+\.?\d*)/;
2383: if ($fwidth<$1) {$fwidth=$1;}
2384: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2385: }
2386: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2387: my $current_length=$1;
2388: if ($fwidth<$current_length) {$fwidth=$current_length;}
2389: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2390: }
2391: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2392: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2393: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2394: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2395: } elsif ($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)*/) {
2396: my $garbage_data=$data;
2397: my $fwidth=0;
2398: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2399: my $current_length=&recalc($1);
2400: $current_length=~/(\d+\.?\d*)/;
2401: if ($fwidth<$1) {$fwidth=$1;}
2402: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2403: }
2404: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2405: my $current_length=&recalc($1);
2406: $current_length=~/(\d+\.?\d*)/;
2407: if ($fwidth<$1) {$fwidth=$1;}
2408: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2409: }
2410: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2411: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2412: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2413: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2414: $data=~s/\\\\\s*$//;
2415: } else {
2416: $data=~s/^\s+(\S.*)/$1/;
2417: $data=~s/(.*\S)\s+$/$1/;
2418: $data=~s/(\s)+/$1/;
2419: my ($current_length,$min_length)=(0,0);
2420: if ($data=~/\\vskip/) {
2421: my $newdata=$data;
2422: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2423: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2424: foreach my $elementdata (@newdata) {
2425: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2426: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2427: my @words=split(/ /,$elementdata);
2428: foreach my $word (@words) {
2429: my $lengthword=2.5*&LATEX_length($word);
2430: if ($min_length<$lengthword) {$min_length=$lengthword;}
2431: }
2432: }
2433: } else {
2434: $current_length=2.5*&LATEX_length($data);
2435: my @words=split(/ /,$data);
2436: foreach my $word (@words) {
2437: my $lengthword=2*&LATEX_length($word);
2438: if ($min_length<$lengthword) {$min_length=$lengthword;}
2439: }
2440: }
2441: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2442: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2443: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2444: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2445: }
2446: }
2447: # Substitute all of the tables nested in this cell in their appropriate places.
2448:
2449:
2450: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2451: for (my $in=0; $in<=$nested_count; $in++) {
2452: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2453: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2454: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2455: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2456:
2457: }
2458: # Should be be killing off the 'include' elements as they're used up?
2459: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2460: return '';
2461: }
2462:
2463: sub end_td {
2464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2465: my $currentstring = '';
2466: if ($target eq 'web') {
2467: $currentstring = $token->[2];
2468: } elsif ($target eq 'tex') {
2469: $Apache::londefdef::TD_redirection =0;
2470: &end_td_tex($parstack,$parser,$safeeval);
2471: }
2472: return $currentstring;
2473: }
2474:
2475: #-- <th> tag (end tag optional)
2476: sub start_th {
2477: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2478: my $currentstring = '';
2479: if ($target eq 'web') {
2480: $currentstring = $token->[4];
2481: } elsif ($target eq 'tex') {
2482: $Apache::londefdef::TD_redirection = 1;
2483: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2484: }
2485: return $currentstring;
2486: }
2487:
2488: sub tagg_check {
2489: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2490: my @ar=@$parstack;
2491: for (my $i=$#ar-1;$i>=0;$i--) {
2492: if (lc($$tagstack[$i]) eq $good_tag) {
2493: &start_th_tex($parstack,$parser,$safeeval);
2494: last;
2495: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2496: splice @ar, $i+1;
2497: &end_th_tex(\@ar,$parser,$safeeval);
2498: &start_th_tex($parstack,$parser,$safeeval);
2499: last;
2500: }
2501: }
2502: return '';
2503: }
2504:
2505: sub start_th_tex {
2506: my ($parstack,$parser,$safeeval) = @_;
2507: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2508: if ($alignchar eq '') {
2509: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2510: }
2511: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2512: $Apache::londefdef::table[-1]{'counter_columns'}++;
2513: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2514: if (defined $TeXwidth) {
2515: my $current_length=&recalc($TeXwidth);
2516: $current_length=~/(\d+\.?\d*)/;
2517: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2518: }
2519: &Apache::lonxml::startredirection();
2520: return '';
2521: }
2522:
2523: sub end_th_tex {
2524: my ($parstack,$parser,$safeeval) = @_;
2525: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2526: my $data=&Apache::lonxml::endredirection();
2527: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2528: if (defined $TeXwidth) {
2529: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2530: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2531: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2532: } else {
2533: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2534: my $garbage_data=$data;
2535: my $fwidth=0;
2536: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2537: my $current_length=&recalc($1);
2538: $current_length=~/(\d+\.?\d*)/;
2539: if ($fwidth<$1) {$fwidth=$1;}
2540: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2541: }
2542: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2543: my $current_length=$1;
2544: if ($fwidth<$current_length) {$fwidth=$current_length;}
2545: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2546: }
2547: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2548: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2549: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2550: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2551: } else {
2552: $data=~s/^\s+(\S.*)/$1/;
2553: $data=~s/(.*\S)\s+$/$1/;
2554: $data=~s/(\s)+/$1/;
2555: my ($current_length,$min_length)=(0,0);
2556: if ($data=~/\\vskip/) {
2557: my $newdata=$data;
2558: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2559: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2560: foreach my $elementdata (@newdata) {
2561: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2562: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2563: my @words=split(/ /,$elementdata);
2564: foreach my $word (@words) {
2565: my $lengthword=2.5*&LATEX_length($word);
2566: if ($min_length<$lengthword) {$min_length=$lengthword;}
2567: }
2568: }
2569: } else {
2570: $current_length=2.5*&LATEX_length($data);
2571: my @words=split(/ /,$data);
2572: foreach my $word (@words) {
2573: my $lengthword=2*&LATEX_length($word);
2574: if ($min_length<$lengthword) {$min_length=$lengthword;}
2575: }
2576: }
2577: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2578: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2579: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2580: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2581: }
2582: }
2583: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2584: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2585: }
2586: #make data bold
2587: $data='\textbf{'.$data.'}';
2588: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2589: return'';
2590: }
2591:
2592: sub end_th {
2593: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2594: my $currentstring = &end_p(); # Close any open <p> in the row.
2595: if ($target eq 'web') {
2596: $currentstring .= $token->[2];
2597: } elsif ($target eq 'tex') {
2598: $Apache::londefdef::TD_redirection =0;
2599: &end_th_tex($parstack,$parser,$safeeval);
2600: }
2601: return $currentstring;
2602: }
2603:
2604: #-- <img> tag (end tag forbidden)
2605: #
2606: # Render the <IMG> tag.
2607: # <IMG> has the following attributes (in addition to the
2608: # standard HTML ones:
2609: # TeXwrap - Governs how the tex target will try to wrap text around
2610: # horizontally aligned images.
2611: # TeXwidth - The width of the image when rendered for print (mm).
2612: # TeXheight - The height of the image when rendered for print (mm)
2613: # (Note there seems to also be support for this as a % of page size)
2614: #
2615: sub start_img {
2616: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2617: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2618: undef,1);
2619: if (not $src and ($target eq 'web' or $target eq 'tex')) {
2620: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2621: return '';
2622: }
2623: &Apache::lonxml::extlink($src);
2624: my $currentstring = '';
2625: my $scaling = .3;
2626:
2627: # Render unto browsers that which are the browser's...
2628:
2629: if ($target eq 'web') {
2630: if ($env{'browser.imagesuppress'} ne 'on') {
2631: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2632: } else {
2633: my $alttag= &Apache::lonxml::get_param
2634: ('alt',$parstack,$safeeval,undef,1);
2635: unless ($alttag) {
2636: $alttag=&Apache::lonmeta::alttag
2637: ($Apache::lonxml::pwd[-1],$src);
2638: }
2639: $currentstring.='[IMAGE: '.$alttag.']';
2640: }
2641:
2642: # and render unto TeX that which is LaTeX
2643:
2644: } elsif ($target eq 'tex') {
2645: #
2646: # The alignment will require some superstructure to be put around
2647: # the \includegraphics stuff. At present we can only partially
2648: # simulate the alignments offered by html.
2649: #
2650: #
2651: my $align = lc(&Apache::lonxml::get_param('align',
2652: $parstack,
2653: $safeeval,
2654: undef,1));
2655: if(!$align) {
2656: # disabled for now see BUG#4535
2657: if (&is_inside_of($tagstack, "table")) {
2658: $align = "top"; # Force top of image to top of table cell
2659: } else {
2660: $align = "bottom"; # This is html's default so it's ours too.
2661: }
2662: }
2663: #
2664: &Apache::lonxml::debug("Alignemnt = $align");
2665: # LaTeX's image/text wrapping is really bad since it wants to
2666: # make figures float.
2667: # The user has the optional parameter (applicable only to l/r
2668: # alignment to use the picins/parpic directive to get wrapped text
2669: # this is also imperfect.. that's why we give them a choice...
2670: # so they can't yell at us for our choice.
2671: #
2672: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2673: $parstack,
2674: $safeeval,
2675: undef,0);
2676: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2677: if(!$latex_rendering) {
2678: $latex_rendering = "texwrap";
2679: }
2680: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2681:
2682: #if original gif/jpg/png file exist do following:
2683: my $origsrc=$src;
2684: my ($path,$file) = &get_eps_image($src);
2685: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2686: &Apache::lonxml::debug("path = $path file = $file src = $src");
2687: if (-e $src) {
2688: &Apache::lonxml::debug("$src exists");
2689: my ($height_param,$width_param)=
2690: &image_size($origsrc,0.3,$parstack,$safeeval);
2691: my $destpath = $path;
2692: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2693: my $destfile = $file;
2694: $destfile =~ s/ /\_/g;
2695: my $size;
2696: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2697: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2698: $size='['.$size;
2699: $size=~s/,$/]/;
2700: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2701: .'\includegraphics'.$size.'{'.$destfile.'} ';
2702:
2703: # If there's an alignment specification we need to honor it here.
2704: # For the horizontal alignments, we will also honor the
2705: # value of the latex specfication. The default is parbox,
2706: # and that's used for illegal values too.
2707: #
2708: # Even though we set a default alignment value, the user
2709: # could have given us an illegal value. In that case we
2710: # just use the default alignment of bottom..
2711: if ($align eq "top") {
2712: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2713: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2714: my $offset = $height_param/2;
2715: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2716: } elsif ($align eq "left") {
2717: if ($latex_rendering eq "parpic") {
2718: $currentstring = '\parpic[l]{'.$currentstring.'}';
2719: } else { # wrapfig render
2720: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2721: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2722: }
2723: } elsif ($align eq "right") {
2724: if ($latex_rendering eq "parpic") {
2725: $currentstring = '\parpic[r]{'.$currentstring.'}';
2726: } else { # wrapfig rendering
2727: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2728: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2729:
2730: }
2731: } else { # Bottom is also default.
2732: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2733: }
2734: } else {
2735: &Apache::lonxml::debug("$src does not exist");
2736: #original image file doesn't exist so check the alt attribute
2737: my $alt =
2738: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2739: unless ($alt) {
2740: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2741: }
2742:
2743: if ($alt) { $currentstring .= ' '.$alt.' '; }
2744: }
2745:
2746: # And here's where the semi-quote breaks down: allow the user
2747: # to edit the beast as well by rendering the problem for edit:
2748: } elsif ($target eq 'edit') {
2749: $currentstring .=&Apache::edit::tag_start($target,$token);
2750: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2751: &Apache::edit::browse('src',undef,'alt').' '.
2752: &Apache::edit::search('src',undef,'alt').'<br />';
2753: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2754: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2755: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2756: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2757: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2758: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2759: ['','bottom','middle','top','left','right'],$token,5);
2760: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2761: ['', 'parbox', 'parpic'], $token, 2);
2762: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2763: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2764: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2765: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2766: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2767:
2768:
2769: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2770: if ($width) { $currentstring.=' width="'.$width.'" '; }
2771: if ($height) { $currentstring.=' height="'.$height.'" '; }
2772: $currentstring .= ' />';
2773: } elsif ($target eq 'modified') {
2774: my ($osrc,$owidth,$oheight)=
2775: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2776: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2777: $safeeval,'src','alt','align',
2778: 'TeXwidth','TeXheight', 'TeXwrap',
2779: 'width','height');
2780: my ($nsrc,$nwidth,$nheight)=
2781: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2782: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2783: &image_replication($loc);
2784: my ($iwidth,$iheight);
2785: if (-e $loc) {
2786: my $image = Image::Magick->new;
2787: $image->Read($loc);
2788: ($iwidth, $iheight) = ($image->Get('width'),
2789: $image->Get('height'));
2790: }
2791: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2792: # changed image or no size specified,
2793: # if they didn't explicitly change the
2794: # width or height use the ones from the image
2795: if ($iwidth && $iheight) {
2796: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2797: $token->[2]{'width'} = $iwidth;$ctag=1;
2798: }
2799: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2800: $token->[2]{'height'}=$iheight;$ctag=1;
2801: }
2802: }
2803: }
2804: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2805: # if we don't have a width or height
2806: if ($iwidth && $cwidth && !$cheight) {
2807: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2808: }
2809: if ($iheight && $cheight && !$cwidth) {
2810: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2811: }
2812: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2813: }
2814:
2815: return $currentstring;
2816: }
2817:
2818: sub end_img {
2819: my ($target,$token) = @_;
2820: my $currentstring = '';
2821: if ($target eq 'web') {
2822: $currentstring = $token->[2];
2823: } elsif ($target eq 'tex') {
2824: $currentstring = '';
2825: }
2826: return $currentstring;
2827: }
2828:
2829: #-- <applet> tag (end tag required)
2830: sub start_applet {
2831: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2832:
2833: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2834: &Apache::lonxml::extlink($code);
2835: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2836: undef,1);
2837: &Apache::lonxml::extlink($archive);
2838: my $currentstring = '';
2839: if ($target eq 'web') {
2840: if ($env{'browser.appletsuppress'} ne 'on') {
2841: $currentstring = &Apache::lonenc::encrypt_ref($token,
2842: {'code'=>$code,
2843: 'archive'=>$archive}
2844: );
2845: } else {
2846: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2847: $safeeval,undef,1);
2848: unless ($alttag) {
2849: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2850: $code);
2851: }
2852: $currentstring='[APPLET: '.$alttag.']';
2853: }
2854: } elsif ($target eq 'tex') {
2855: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2856: $safeeval,undef,1);
2857: unless ($alttag) {
2858: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2859: undef,1);
2860: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2861: $code);
2862: }
2863: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2864: '.}\end{center}';
2865: }
2866: return $currentstring;
2867: }
2868:
2869: sub end_applet {
2870: my ($target,$token) = @_;
2871: my $currentstring = '';
2872: if ($target eq 'web') {
2873: $currentstring = $token->[2];
2874: } elsif ($target eq 'tex') {
2875: }
2876: return $currentstring;
2877: }
2878:
2879: #-- <embed> tag (end tag optional/required)
2880: sub start_embed {
2881: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2882: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2883: &Apache::lonxml::extlink($src);
2884: my $currentstring = '';
2885: if ($target eq 'web') {
2886: if ($env{'browser.embedsuppress'} ne 'on') {
2887: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2888: } else {
2889: my $alttag=&Apache::lonxml::get_param
2890: ('alt',$parstack,$safeeval,undef,1);
2891: unless ($alttag) {
2892: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2893: }
2894: $currentstring='[EMBED: '.$alttag.']';
2895: }
2896: } elsif ($target eq 'tex') {
2897: }
2898: return $currentstring;
2899: }
2900:
2901: sub end_embed {
2902: my ($target,$token) = @_;
2903: my $currentstring = '';
2904: if ($target eq 'web') {
2905: $currentstring = $token->[2];
2906: } elsif ($target eq 'tex') {
2907: }
2908: return $currentstring;
2909: }
2910:
2911: #-- <param> tag (end tag forbidden)
2912: sub start_param {
2913: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2914: if (&Apache::lonxml::get_param('name',$parstack,
2915: $safeeval,undef,1)=~/^cabbase$/i) {
2916: my $value=&Apache::lonxml::get_param('value',$parstack,
2917: $safeeval,undef,1);
2918: &Apache::lonxml::extlink($value);
2919: }
2920:
2921: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2922: &Apache::lonxml::extlink($src);
2923: my $currentstring = '';
2924: if ($target eq 'web') {
2925: my %toconvert;
2926: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2927: if ($src) { $toconvert{'src'}= $src; }
2928: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
2929: undef,1);
2930: if ($name=~/^cabbase$/i) {
2931: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
2932: $safeeval,undef,1);
2933: }
2934: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
2935: } elsif ($target eq 'tex') {
2936: }
2937: return $currentstring;
2938: }
2939:
2940: sub end_param {
2941: my ($target,$token) = @_;
2942: my $currentstring = '';
2943: if ($target eq 'web') {
2944: $currentstring = $token->[2];
2945: } elsif ($target eq 'tex') {
2946: }
2947: return $currentstring;
2948: }
2949:
2950: #-- <allow> tag
2951: sub start_allow {
2952: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2953: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2954: &Apache::lonxml::extlink($src);
2955:
2956: if ($target eq 'tex') { &image_replication($src); }
2957: my $result;
2958: if ($target eq 'edit') {
2959: $result .=&Apache::edit::tag_start($target,$token);
2960: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
2961: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
2962: } elsif ($target eq 'modified') {
2963: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
2964: $safeeval,'src');
2965: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
2966: }
2967: return $result;
2968: }
2969:
2970: sub end_allow {
2971: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2972: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
2973: return '';
2974: }
2975:
2976: #-- Frames (end tag required)
2977: #-- <frameset>
2978: sub start_frameset {
2979: my ($target,$token) = @_;
2980: my $currentstring = ''; # Close any pending para.
2981: if ($target eq 'web') {
2982: if (!$Apache::lonxml::registered &&
2983: $env{'request.state'} eq 'published') {
2984: $currentstring.='<head>'.
2985: &Apache::lonmenu::registerurl(undef,$target).'</head>';
2986: }
2987: my $onLoad='';
2988: foreach my $key (keys(%{$token->[2]})) {
2989: if ($key =~ /^onload$/i) {
2990: $onLoad.=$token->[2]->{$key}.';';
2991: delete($token->[2]->{$key});
2992: }
2993: }
2994: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
2995: my $onUnload='';
2996: foreach my $key (keys(%{$token->[2]})) {
2997: if ($key =~ /^onunload$/i) {
2998: $onUnload.=$token->[2]->{$key}.';';
2999: delete($token->[2]->{$key});
3000: }
3001: }
3002: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
3003: ';'.$onUnload;
3004:
3005: $currentstring .= '<'.$token->[1];
3006: foreach (keys %{$token->[2]}) {
3007: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
3008: }
3009: $currentstring.='>';
3010: }
3011: return $currentstring;
3012: }
3013:
3014: sub end_frameset {
3015: my ($target,$token) = @_;
3016: my $currentstring = '';
3017: if ($target eq 'web') {
3018: $currentstring = $token->[2];
3019: }
3020: return $currentstring;
3021: }
3022:
3023: #-- <xmp> (end tag required)
3024: sub start_xmp {
3025: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3026: my $currentstring = '';
3027: if ($target eq 'web') {
3028: $currentstring .= $token->[4];
3029: } elsif ($target eq 'tex') {
3030: $currentstring .= '\begin{verbatim}';
3031: }
3032: return $currentstring;
3033: }
3034:
3035: sub end_xmp {
3036: my ($target,$token) = @_;
3037: my $currentstring = '';
3038: if ($target eq 'web') {
3039: $currentstring .= $token->[2];
3040: } elsif ($target eq 'tex') {
3041: $currentstring .= '\end{verbatim}';
3042: }
3043: return $currentstring;
3044: }
3045:
3046: #-- <pre> (end tag required)
3047: sub start_pre {
3048: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3049: my $currentstring = &end_p(); # close off pending <p>
3050: if ($target eq 'web') {
3051: $currentstring .= $token->[4];
3052: } elsif ($target eq 'tex') {
3053: $currentstring .= '\begin{verbatim}';
3054: }
3055: return $currentstring;
3056: }
3057:
3058: sub end_pre {
3059: my ($target,$token) = @_;
3060: my $currentstring = '';
3061: if ($target eq 'web') {
3062: $currentstring .= $token->[2];
3063: } elsif ($target eq 'tex') {
3064: $currentstring .= '\end{verbatim}';
3065: }
3066: return $currentstring;
3067: }
3068:
3069: #-- <insert>
3070: sub start_insert {
3071: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3072: my $currentstring = '';
3073: if ($target eq 'web') {
3074: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3075: $currentstring .= '<b>'.$display.'</b>';;
3076: }
3077: return $currentstring;
3078: }
3079:
3080: sub end_insert {
3081: my ($target,$token) = @_;
3082: my $currentstring = '';
3083: if ($target eq 'web') {
3084: $currentstring .= '';
3085: }
3086: return $currentstring;
3087: }
3088:
3089: #-- <externallink>
3090: sub start_externallink {
3091: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3092: my $currentstring = '';
3093: if ($target eq 'web') {
3094: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3095: $currentstring .= '<b>'.$display.'</b>';;
3096: }
3097: return $currentstring;
3098: }
3099:
3100: sub end_externallink {
3101: my ($target,$token) = @_;
3102: my $currentstring = '';
3103: if ($target eq 'web') {
3104: $currentstring .= '';
3105: }
3106: return $currentstring;
3107: }
3108:
3109: #-- <blankspace heigth="">
3110: sub start_blankspace {
3111: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3112: my $currentstring = &end_p(); # closes off any unclosed <p>
3113: if ($target eq 'tex') {
3114: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3115: $currentstring .= '\vskip '.$howmuch.' ';
3116: }
3117: return $currentstring;
3118: }
3119:
3120: sub end_blankspace {
3121: my ($target,$token) = @_;
3122: my $currentstring = '';
3123: if ($target eq 'tex') {
3124: $currentstring .= '';
3125: }
3126: return $currentstring;
3127: }
3128:
3129: #-- <abbr> tag (end tag required)
3130: sub start_abbr {
3131: my ($target,$token) = @_;
3132: my $currentstring = '';
3133: if ($target eq 'web') {
3134: $currentstring = $token->[4];
3135: }
3136: return $currentstring;
3137: }
3138:
3139: sub end_abbr {
3140: my ($target,$token) = @_;
3141: my $currentstring = '';
3142: if ($target eq 'web') {
3143: $currentstring = $token->[2];
3144: }
3145: return $currentstring;
3146: }
3147:
3148: #-- <acronym> tag (end tag required)
3149: sub start_acronym {
3150: my ($target,$token) = @_;
3151: my $currentstring = '';
3152: if ($target eq 'web') {
3153: $currentstring = $token->[4];
3154: }
3155: return $currentstring;
3156: }
3157:
3158: sub end_acronym {
3159: my ($target,$token) = @_;
3160: my $currentstring = '';
3161: if ($target eq 'web') {
3162: $currentstring = $token->[2];
3163: }
3164: return $currentstring;
3165: }
3166:
3167: #-- <area> tag (end tag forbidden)
3168: sub start_area {
3169: my ($target,$token) = @_;
3170: my $currentstring = '';
3171: if ($target eq 'web') {
3172: $currentstring = $token->[4];
3173: }
3174: return $currentstring;
3175: }
3176:
3177: sub end_area {
3178: my ($target,$token) = @_;
3179: my $currentstring = '';
3180: if ($target eq 'web') {
3181: $currentstring = $token->[2];
3182: }
3183: return $currentstring;
3184: }
3185:
3186: #-- <base> tag (end tag forbidden)
3187: sub start_base {
3188: my ($target,$token) = @_;
3189: my $currentstring = '';
3190: if ($target eq 'web') {
3191: $currentstring = $token->[4];
3192: }
3193: return $currentstring;
3194: }
3195:
3196: sub end_base {
3197: my ($target,$token) = @_;
3198: my $currentstring = '';
3199: if ($target eq 'web') {
3200: $currentstring = $token->[2];
3201: }
3202: return $currentstring;
3203: }
3204:
3205: #-- <bdo> tag (end tag required)
3206: sub start_bdo {
3207: my ($target,$token) = @_;
3208: my $currentstring = '';
3209: if ($target eq 'web') {
3210: $currentstring = $token->[4];
3211: }
3212: return $currentstring;
3213: }
3214:
3215: sub end_bdo {
3216: my ($target,$token) = @_;
3217: my $currentstring = '';
3218: if ($target eq 'web') {
3219: $currentstring = $token->[2];
3220: }
3221: return $currentstring;
3222: }
3223:
3224: #-- <bgsound> tag (end tag optional)
3225: sub start_bgsound {
3226: my ($target,$token) = @_;
3227: my $currentstring = '';
3228: if ($target eq 'web') {
3229: $currentstring = $token->[4];
3230: }
3231: return $currentstring;
3232: }
3233:
3234: sub end_bgsound {
3235: my ($target,$token) = @_;
3236: my $currentstring = '';
3237: if ($target eq 'web') {
3238: $currentstring = $token->[2];
3239: }
3240: return $currentstring;
3241: }
3242:
3243: #-- <blink> tag (end tag required)
3244: sub start_blink {
3245: my ($target,$token) = @_;
3246: my $currentstring = '';
3247: if ($target eq 'web') {
3248: $currentstring = $token->[4];
3249: }
3250: return $currentstring;
3251: }
3252:
3253: sub end_blink {
3254: my ($target,$token) = @_;
3255: my $currentstring = '';
3256: if ($target eq 'web') {
3257: $currentstring = $token->[2];
3258: }
3259: return $currentstring;
3260: }
3261:
3262: #-- <blockquote> tag (end tag required)
3263: sub start_blockquote {
3264: my ($target,$token) = @_;
3265: my $currentstring = &end_p(); # Close any unclosed <p>
3266: if ($target eq 'web') {
3267: $currentstring .= $token->[4];
3268: }
3269: return $currentstring;
3270: }
3271:
3272: sub end_blockquote {
3273: my ($target,$token) = @_;
3274: my $currentstring = '';
3275: if ($target eq 'web') {
3276: $currentstring = $token->[2];
3277: }
3278: return $currentstring;
3279: }
3280:
3281: #-- <button> tag (end tag required)
3282: sub start_button {
3283: my ($target,$token) = @_;
3284: my $currentstring = '';
3285: if ($target eq 'web') {
3286: $currentstring = $token->[4];
3287: }
3288: return $currentstring;
3289: }
3290:
3291: sub end_button {
3292: my ($target,$token) = @_;
3293: my $currentstring = '';
3294: if ($target eq 'web') {
3295: $currentstring = $token->[2];
3296: }
3297: return $currentstring;
3298: }
3299:
3300: #-- <caption> tag (end tag required)
3301: sub start_caption {
3302: my ($target,$token) = @_;
3303: my $currentstring = '';
3304: if ($target eq 'web') {
3305: $currentstring = $token->[4];
3306: }
3307: return $currentstring;
3308: }
3309:
3310: sub end_caption {
3311: my ($target,$token) = @_;
3312: my $currentstring = '';
3313: if ($target eq 'web') {
3314: $currentstring = $token->[2];
3315: }
3316: return $currentstring;
3317: }
3318:
3319: #-- <col> tag (end tag forbdden)
3320: sub start_col {
3321: my ($target,$token) = @_;
3322: my $currentstring = '';
3323: if ($target eq 'web') {
3324: $currentstring = $token->[4];
3325: }
3326: return $currentstring;
3327: }
3328:
3329: sub end_col {
3330: my ($target,$token) = @_;
3331: my $currentstring = '';
3332: if ($target eq 'web') {
3333: $currentstring = $token->[2];
3334: }
3335: return $currentstring;
3336: }
3337:
3338: #-- <colgroup> tag (end tag optional)
3339: sub start_colgroup {
3340: my ($target,$token) = @_;
3341: my $currentstring = '';
3342: if ($target eq 'web') {
3343: $currentstring = $token->[4];
3344: }
3345: return $currentstring;
3346: }
3347:
3348: sub end_colgroup {
3349: my ($target,$token) = @_;
3350: my $currentstring = '';
3351: if ($target eq 'web') {
3352: $currentstring = $token->[2];
3353: }
3354: return $currentstring;
3355: }
3356:
3357: #-- <del> tag (end tag required)
3358: sub start_del {
3359: my ($target,$token) = @_;
3360: my $currentstring = '';
3361: if ($target eq 'web') {
3362: $currentstring = $token->[4];
3363: }
3364: return $currentstring;
3365: }
3366:
3367: sub end_del {
3368: my ($target,$token) = @_;
3369: my $currentstring = '';
3370: if ($target eq 'web') {
3371: $currentstring = $token->[2];
3372: }
3373: return $currentstring;
3374: }
3375:
3376: #-- <fieldset> tag (end tag required)
3377: sub start_fieldset {
3378: my ($target,$token) = @_;
3379: my $currentstring = '';
3380: if ($target eq 'web') {
3381: $currentstring = $token->[4];
3382: }
3383: return $currentstring;
3384: }
3385:
3386: sub end_fieldset {
3387: my ($target,$token) = @_;
3388: my $currentstring = '';
3389: if ($target eq 'web') {
3390: $currentstring = $token->[2];
3391: }
3392: return $currentstring;
3393: }
3394:
3395: #-- <frame> tag (end tag forbidden)
3396: sub start_frame {
3397: my ($target,$token) = @_;
3398: my $currentstring = '';
3399: if ($target eq 'web') {
3400: $currentstring = $token->[4];
3401: }
3402: return $currentstring;
3403: }
3404:
3405: sub end_frame {
3406: my ($target,$token) = @_;
3407: my $currentstring = '';
3408: if ($target eq 'web') {
3409: $currentstring = $token->[2];
3410: }
3411: return $currentstring;
3412: }
3413:
3414: #-- <iframe> tag (end tag required)
3415: sub start_iframe {
3416: my ($target,$token) = @_;
3417: my $currentstring = '';
3418: if ($target eq 'web') {
3419: $currentstring = $token->[4];
3420: }
3421: return $currentstring;
3422: }
3423:
3424: sub end_iframe {
3425: my ($target,$token) = @_;
3426: my $currentstring = '';
3427: if ($target eq 'web') {
3428: $currentstring = $token->[2];
3429: }
3430: return $currentstring;
3431: }
3432:
3433: #-- <ins> tag (end tag required)
3434: sub start_ins {
3435: my ($target,$token) = @_;
3436: my $currentstring = '';
3437: if ($target eq 'web') {
3438: $currentstring = $token->[4];
3439: }
3440: return $currentstring;
3441: }
3442:
3443: sub end_ins {
3444: my ($target,$token) = @_;
3445: my $currentstring = '';
3446: if ($target eq 'web') {
3447: $currentstring = $token->[2];
3448: }
3449: return $currentstring;
3450: }
3451:
3452: #-- <isindex> tag (end tag forbidden)
3453: sub start_isindex {
3454: my ($target,$token) = @_;
3455: my $currentstring = '';
3456: if ($target eq 'web') {
3457: $currentstring = $token->[4];
3458: }
3459: return $currentstring;
3460: }
3461:
3462: sub end_isindex {
3463: my ($target,$token) = @_;
3464: my $currentstring = '';
3465: if ($target eq 'web') {
3466: $currentstring = $token->[2];
3467: }
3468: return $currentstring;
3469: }
3470:
3471: #-- <keygen> tag (end tag forbidden)
3472: sub start_keygen {
3473: my ($target,$token) = @_;
3474: my $currentstring = '';
3475: if ($target eq 'web') {
3476: $currentstring = $token->[4];
3477: }
3478: return $currentstring;
3479: }
3480:
3481: sub end_keygen {
3482: my ($target,$token) = @_;
3483: my $currentstring = '';
3484: if ($target eq 'web') {
3485: $currentstring = $token->[2];
3486: }
3487: return $currentstring;
3488: }
3489:
3490: #-- <label> tag
3491: sub start_label {
3492: my ($target,$token) = @_;
3493: my $currentstring = '';
3494: if ($target eq 'web') {
3495: $currentstring = $token->[4];
3496: }
3497: return $currentstring;
3498: }
3499:
3500: sub end_label {
3501: my ($target,$token) = @_;
3502: my $currentstring = '';
3503: if ($target eq 'web') {
3504: $currentstring = $token->[2];
3505: }
3506: return $currentstring;
3507: }
3508:
3509: #-- <layer> tag (end tag required)
3510: sub start_layer {
3511: my ($target,$token) = @_;
3512: my $currentstring = '';
3513: if ($target eq 'web') {
3514: $currentstring = $token->[4];
3515: }
3516: return $currentstring;
3517: }
3518:
3519: sub end_layer {
3520: my ($target,$token) = @_;
3521: my $currentstring = '';
3522: if ($target eq 'web') {
3523: $currentstring = $token->[2];
3524: }
3525: return $currentstring;
3526: }
3527:
3528: #-- <legend> tag (end tag required)
3529: sub start_legend {
3530: my ($target,$token) = @_;
3531: my $currentstring = '';
3532: if ($target eq 'web') {
3533: $currentstring = $token->[4];
3534: }
3535: return $currentstring;
3536: }
3537:
3538: sub end_legend {
3539: my ($target,$token) = @_;
3540: my $currentstring = '';
3541: if ($target eq 'web') {
3542: $currentstring = $token->[2];
3543: }
3544: return $currentstring;
3545: }
3546:
3547: #-- <link> tag (end tag forbidden)
3548: sub start_link {
3549: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3550: my $currentstring = '';
3551: if ($target eq 'web') {
3552: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3553: undef,1);
3554: &Apache::lonxml::extlink($href);
3555: $currentstring = $token->[4];
3556: }
3557: return $currentstring;
3558: }
3559:
3560: sub end_link {
3561: my ($target,$token) = @_;
3562: my $currentstring = '';
3563: if ($target eq 'web') {
3564: $currentstring = $token->[2];
3565: }
3566: return $currentstring;
3567: }
3568:
3569: #-- <marquee> tag (end tag optional)
3570: sub start_marquee {
3571: my ($target,$token) = @_;
3572: my $currentstring = '';
3573: if ($target eq 'web') {
3574: $currentstring = $token->[4];
3575: }
3576: return $currentstring;
3577: }
3578:
3579: sub end_marquee {
3580: my ($target,$token) = @_;
3581: my $currentstring = '';
3582: if ($target eq 'web') {
3583: $currentstring = $token->[2];
3584: }
3585: return $currentstring;
3586: }
3587:
3588: #-- <multicol> tag (end tag required)
3589: sub start_multicol {
3590: my ($target,$token) = @_;
3591: my $currentstring = &end_p(); # Close any pending <p>
3592: if ($target eq 'web') {
3593: $currentstring .= $token->[4];
3594: }
3595: return $currentstring;
3596: }
3597:
3598: sub end_multicol {
3599: my ($target,$token) = @_;
3600: my $currentstring = '';
3601: if ($target eq 'web') {
3602: $currentstring = $token->[2];
3603: }
3604: return $currentstring;
3605: }
3606:
3607: #-- <nobr> tag (end tag required)
3608: sub start_nobr {
3609: my ($target,$token) = @_;
3610: my $currentstring = '';
3611: if ($target eq 'web') {
3612: $currentstring = $token->[4];
3613: } elsif ($target eq 'tex') {
3614: $currentstring='\mbox{';
3615: }
3616: return $currentstring;
3617: }
3618:
3619: sub end_nobr {
3620: my ($target,$token) = @_;
3621: my $currentstring = '';
3622: if ($target eq 'web') {
3623: $currentstring = $token->[2];
3624: } elsif ($target eq 'tex') {
3625: $currentstring='}';
3626: }
3627: return $currentstring;
3628: }
3629:
3630: #-- <noembed> tag (end tag required)
3631: sub start_noembed {
3632: my ($target,$token) = @_;
3633: my $currentstring = '';
3634: if ($target eq 'web') {
3635: $currentstring = $token->[4];
3636: }
3637: return $currentstring;
3638: }
3639:
3640: sub end_noembed {
3641: my ($target,$token) = @_;
3642: my $currentstring = '';
3643: if ($target eq 'web') {
3644: $currentstring = $token->[2];
3645: }
3646: return $currentstring;
3647: }
3648:
3649: #-- <noframes> tag (end tag required)
3650: sub start_noframes {
3651: my ($target,$token) = @_;
3652: my $currentstring = '';
3653: if ($target eq 'web') {
3654: $currentstring = $token->[4];
3655: }
3656: return $currentstring;
3657: }
3658:
3659: sub end_noframes {
3660: my ($target,$token) = @_;
3661: my $currentstring = '';
3662: if ($target eq 'web') {
3663: $currentstring = $token->[2];
3664: }
3665: return $currentstring;
3666: }
3667:
3668: #-- <nolayer> tag (end tag required)
3669: sub start_nolayer {
3670: my ($target,$token) = @_;
3671: my $currentstring = '';
3672: if ($target eq 'web') {
3673: $currentstring = $token->[4];
3674: }
3675: return $currentstring;
3676: }
3677:
3678: sub end_nolayer {
3679: my ($target,$token) = @_;
3680: my $currentstring = '';
3681: if ($target eq 'web') {
3682: $currentstring = $token->[2];
3683: }
3684: return $currentstring;
3685: }
3686:
3687: #-- <noscript> tag (end tag required)
3688: sub start_noscript {
3689: my ($target,$token) = @_;
3690: my $currentstring = '';
3691: if ($target eq 'web') {
3692: $currentstring = $token->[4];
3693: }
3694: return $currentstring;
3695: }
3696:
3697: sub end_noscript {
3698: my ($target,$token) = @_;
3699: my $currentstring = '';
3700: if ($target eq 'web') {
3701: $currentstring = $token->[2];
3702: }
3703: return $currentstring;
3704: }
3705:
3706: #-- <object> tag (end tag required)
3707: sub start_object {
3708: my ($target,$token) = @_;
3709: my $currentstring = '';
3710: if ($target eq 'web') {
3711: $currentstring = $token->[4];
3712: }
3713: return $currentstring;
3714: }
3715:
3716: sub end_object {
3717: my ($target,$token) = @_;
3718: my $currentstring = '';
3719: if ($target eq 'web') {
3720: $currentstring = $token->[2];
3721: }
3722: return $currentstring;
3723: }
3724:
3725: #-- <optgroup> tag (end tag required)
3726: sub start_optgroup {
3727: my ($target,$token) = @_;
3728: my $currentstring = '';
3729: if ($target eq 'web') {
3730: $currentstring = $token->[4];
3731: }
3732: return $currentstring;
3733: }
3734:
3735: sub end_optgroup {
3736: my ($target,$token) = @_;
3737: my $currentstring = '';
3738: if ($target eq 'web') {
3739: $currentstring = $token->[2];
3740: }
3741: return $currentstring;
3742: }
3743:
3744: #-- <samp> tag (end tag required)
3745: sub start_samp {
3746: my ($target,$token) = @_;
3747: my $currentstring = '';
3748: if ($target eq 'web') {
3749: $currentstring = $token->[4];
3750: } elsif ($target eq 'tex') {
3751: $currentstring='\texttt{';
3752: }
3753: return $currentstring;
3754: }
3755:
3756: sub end_samp {
3757: my ($target,$token) = @_;
3758: my $currentstring = '';
3759: if ($target eq 'web') {
3760: $currentstring = $token->[2];
3761: } elsif ($target eq 'tex') {
3762: $currentstring='}';
3763: }
3764: return $currentstring;
3765: }
3766:
3767: #-- <server> tag
3768: sub start_server {
3769: my ($target,$token) = @_;
3770: my $currentstring = '';
3771: if ($target eq 'web') {
3772: $currentstring = $token->[4];
3773: }
3774: return $currentstring;
3775: }
3776:
3777: sub end_server {
3778: my ($target,$token) = @_;
3779: my $currentstring = '';
3780: if ($target eq 'web') {
3781: $currentstring = $token->[2];
3782: }
3783: return $currentstring;
3784: }
3785:
3786: #-- <spacer> tag (end tag forbidden)
3787: sub start_spacer {
3788: my ($target,$token) = @_;
3789: my $currentstring = &end_p(); # Close off any open <p> tag.
3790: if ($target eq 'web') {
3791: $currentstring .= $token->[4];
3792: }
3793: return $currentstring;
3794: }
3795:
3796: sub end_spacer {
3797: my ($target,$token) = @_;
3798: my $currentstring = '';
3799: if ($target eq 'web') {
3800: $currentstring = $token->[2];
3801: }
3802: return $currentstring;
3803: }
3804:
3805: #-- <span> tag (end tag required)
3806: sub start_span {
3807: my ($target,$token) = @_;
3808: my $currentstring = '';
3809: if ($target eq 'web') {
3810: $currentstring = $token->[4];
3811: }
3812: return $currentstring;
3813: }
3814:
3815: sub end_span {
3816: my ($target,$token) = @_;
3817: my $currentstring = '';
3818: if ($target eq 'web') {
3819: $currentstring = $token->[2];
3820: }
3821: return $currentstring;
3822: }
3823:
3824: #-- <tbody> tag (end tag optional)
3825: sub start_tbody {
3826: my ($target,$token) = @_;
3827: my $currentstring = '';
3828: if ($target eq 'web') {
3829: $currentstring = $token->[4];
3830: }
3831: return $currentstring;
3832: }
3833:
3834: sub end_tbody {
3835: my ($target,$token) = @_;
3836: my $currentstring = '';
3837: if ($target eq 'web') {
3838: $currentstring = $token->[2];
3839: }
3840: return $currentstring;
3841: }
3842:
3843: #-- <tfoot> tag (end tag optional)
3844: sub start_tfoot {
3845: my ($target,$token) = @_;
3846: my $currentstring = '';
3847: if ($target eq 'web') {
3848: $currentstring = $token->[4];
3849: }
3850: return $currentstring;
3851: }
3852:
3853: sub end_tfoot {
3854: my ($target,$token) = @_;
3855: my $currentstring = '';
3856: if ($target eq 'web') {
3857: $currentstring = $token->[2];
3858: }
3859: return $currentstring;
3860: }
3861:
3862: #-- <thead> tag (end tag optional)
3863: sub start_thead {
3864: my ($target,$token) = @_;
3865: my $currentstring = '';
3866: if ($target eq 'web') {
3867: $currentstring = $token->[4];
3868: }
3869: return $currentstring;
3870: }
3871:
3872: sub end_thead {
3873: my ($target,$token) = @_;
3874: my $currentstring = '';
3875: if ($target eq 'web') {
3876: $currentstring = $token->[2];
3877: }
3878: return $currentstring;
3879: }
3880:
3881: #-- <var> tag
3882: sub start_var {
3883: my ($target,$token) = @_;
3884: my $currentstring = '';
3885: if ($target eq 'web') {
3886: $currentstring = $token->[4];
3887: } elsif ($target eq 'tex') {
3888: $currentstring = '\textit{';
3889: }
3890: return $currentstring;
3891: }
3892:
3893: sub end_var {
3894: my ($target,$token) = @_;
3895: my $currentstring = '';
3896: if ($target eq 'web') {
3897: $currentstring = $token->[2];
3898: } elsif ($target eq 'tex') {
3899: $currentstring = '}';
3900: }
3901: return $currentstring;
3902: }
3903:
3904: #-- <wbr> tag (end tag forbidden)
3905: sub start_wbr {
3906: my ($target,$token) = @_;
3907: my $currentstring = '';
3908: if ($target eq 'web') {
3909: $currentstring = $token->[4];
3910: }
3911: return $currentstring;
3912: }
3913:
3914: sub end_wbr {
3915: my ($target,$token) = @_;
3916: my $currentstring = '';
3917: if ($target eq 'web') {
3918: $currentstring = $token->[2];
3919: }
3920: return $currentstring;
3921: }
3922:
3923: #-- <hideweboutput> tag
3924: sub start_hideweboutput {
3925: my ($target,$token) = @_;
3926: if ($target eq 'web') {
3927: &Apache::lonxml::startredirection();
3928: }
3929: return '';
3930: }
3931:
3932: sub end_hideweboutput {
3933: my ($target,$token) = @_;
3934: my $currentstring = '';
3935: if ($target eq 'web') {
3936: $currentstring = &Apache::lonxml::endredirection();
3937: }
3938: return '';
3939: }
3940:
3941:
3942: sub image_replication {
3943: my $src = shift;
3944: if (not -e $src) { &Apache::lonnet::repcopy($src); }
3945: #replicates eps or ps
3946: my $epssrc = my $pssrc = $src;
3947: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
3948: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
3949: if (not -e $epssrc && not -e $pssrc) {
3950: my $result=&Apache::lonnet::repcopy($epssrc);
3951: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
3952: }
3953: return '';
3954: }
3955: #
3956: # Get correct sizing parameter for an image given
3957: # it's initial ht. and wid. This allows sizing of
3958: # images that are generated on-the-fly (e.g. gnuplot)
3959: # as well as serving as a utility for image_size.
3960: #
3961: # Parameter:
3962: # height_param
3963: # width_param - Initial picture dimensions.
3964: # scaling - A scale factor.
3965: # parstack, - the current stack of tag attributes
3966: # from the xml parser
3967: # safeeval, - pointer to the safespace
3968: # depth, - from what level in the stack to look for attributes
3969: # (assumes -1 if unspecified)
3970: # cis - look for attrubutes case insensitively
3971: # (assumes false)
3972: #
3973: # Returns:
3974: # height, width - new dimensions.
3975: #
3976: sub resize_image {
3977: my ($height_param, $width_param, $scaling,
3978: $parstack, $safeeval, $depth, $cis) = @_;
3979:
3980: # First apply the scaling...
3981:
3982: $height_param = $height_param * $scaling;
3983: $width_param = $width_param * $scaling;
3984:
3985: #do we have any specified LaTeX size of the picture?
3986: my $toget='TeXwidth';
3987: if ($cis) {
3988: $toget=lc($toget);
3989: }
3990: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
3991: $safeeval,$depth,$cis);
3992: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
3993: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
3994: $safeeval,$depth,$cis);
3995: #do we have any specified web size of the picture?
3996: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
3997: $depth,1);
3998: if ($TeXwidth) {
3999: my $old_width_param=$width_param;
4000: if ($TeXwidth=~/(\d+)\s*\%/) {
4001: $width_param = $1*$env{'form.textwidth'}/100;
4002: } else {
4003: $width_param = $TeXwidth;
4004: }
4005: if ($TeXheight) {
4006: $height_param = $TeXheight;
4007: } elsif ($old_width_param) {
4008: $height_param=$TeXwidth/$old_width_param*$height_param;
4009: }
4010: } elsif ($TeXheight) {
4011: $height_param = $TeXheight;
4012: if ($height_param) {
4013: $width_param = $TeXheight/$height_param*$width_param;
4014: }
4015: } elsif ($width) {
4016: my $old_width_param=$width_param;
4017: $width_param = $width*$scaling;
4018: if ($old_width_param) {
4019: $height_param=$width_param/$old_width_param*$height_param;
4020: }
4021: }
4022: if ($width_param > $env{'form.textwidth'}) {
4023: my $old_width_param=$width_param;
4024: $width_param =0.95*$env{'form.textwidth'};
4025: if ($old_width_param) {
4026: $height_param=$width_param/$old_width_param*$height_param;
4027: }
4028: }
4029:
4030: return ($height_param, $width_param);
4031: }
4032:
4033: sub image_size {
4034: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4035:
4036: #size of image from gif/jpg/jpeg/png
4037: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4038: if (-e $ressrc) {
4039: $src = $ressrc;
4040: }
4041: my $image = Image::Magick->new;
4042: my $current_figure = $image->Read($src);
4043: my $width_param = $image->Get('width');
4044: my $height_param = $image->Get('height');
4045: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4046: undef($image);
4047:
4048: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4049: $scaling, $parstack, $safeeval,
4050: $depth, $cis);
4051:
4052: return ($height_param, $width_param);
4053: }
4054:
4055: sub image_width {
4056: my ($height, $width) = &image_size(@_);
4057: return $width;
4058: }
4059: # Not yet 100% sure this is correct in all circumstances..
4060: # due to my uncertainty about mods to image_size.
4061: #
4062: sub image_height {
4063: my ($height, $width) = &image_size(@_);
4064: return $height;
4065: }
4066:
4067: sub get_eps_image {
4068: my ($src)=@_;
4069: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4070:
4071: # In order to prevent the substitution of the alt text, we need to
4072: # be sure the orig_src file is on system now so:
4073:
4074: if (! -e $orig_src) {
4075: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4076: }
4077: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4078: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4079: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4080: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4081: &Apache::lonxml::debug("Filelocation gives: $src");
4082: if (! -e $src) {
4083: &Apache::lonxml::debug("$src does not exist");
4084: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4085: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4086: #if replication failed try to find ps file
4087: $src=~s/\.eps$/\.ps/;
4088: &Apache::lonxml::debug("Now looking for $src");
4089: #if no ps file try to replicate it.
4090: my $didrepcopy = &Apache::lonnet::repcopy($src);
4091: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4092: if ( (not -e $src) ||
4093: ($didrepcopy ne 'ok')) {
4094: &Apache::lonxml::debug("Failed to find or replicate $src");
4095:
4096: #if replication failed try to produce eps file dynamically
4097: $src=~s/\.ps$/\.eps/;
4098: my $temp_file;
4099: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4100: my $newsrc=$orig_src;
4101: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4102: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4103: print FILE "$newsrc\n";
4104: close FILE;
4105: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4106: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4107: if ($sext ne "") { # Put the ext. back in to uniquify.
4108: $src =~ s/\.eps$/$sext.eps/;
4109: }
4110: }
4111: }
4112: }
4113: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4114: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4115: return ($path.'/',$file);
4116: }
4117:
4118: sub eps_generation {
4119: my ($src,$file,$width_param) = @_;
4120: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4121: my $temp_file = Apache::File->new('>>'.$filename);
4122: print $temp_file "$src\n";
4123: my $newsrc = $src;
4124: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4125: $newsrc=~s/\/home\/httpd\/html\/res//;
4126: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4127: $newsrc=~s/\/\.\//\//;
4128: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4129: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4130: $newsrc=~s/\/home\/httpd\/lonUsers//;
4131: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4132: }
4133: if ($newsrc=~/\/userfiles\//) {
4134: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4135: } else {
4136: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4137: }
4138: }
4139:
4140: sub file_path {
4141: my $src=shift;
4142: my ($file,$path);
4143: if ($src =~ m!(.*)/([^/]*)$!) {
4144: $file = $2;
4145: $path = $1.'/';
4146: }
4147: return $file,$path;
4148: }
4149: # Converts a measurement in to mm from any of
4150: # the other valid LaTeX units of measure.
4151: # If the units of measure are missing from the
4152: # parameter, it is assumed to be in and returned
4153: # with mm units of measure
4154: sub recalc {
4155: my $argument = shift;
4156: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4157: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4158: my $value=$1;
4159: my $units=$2;
4160: if ($units eq 'cm') {
4161: $value*=10;
4162: } elsif ($units eq 'in') {
4163: $value*=25.4;
4164: } elsif ($units eq 'pc') {
4165: $value*=(25.4*12/72.27);
4166: } elsif ($units eq 'pt') {
4167: $value*=(25.4/72.27);
4168: }
4169: return $value.' mm';
4170: }
4171:
4172: sub LATEX_length {
4173: my $garbage=shift;
4174: $garbage=~s/^\s+$//;
4175: $garbage=~s/^\s+(\S.*)/$1/;#space before
4176: $garbage=~s/(.*\S)\s+$/$1/;#space after
4177: $garbage=~s/(\s)+/$1/;#only one space
4178: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4179: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4180: $garbage=~s/([^\\])\$/$1/g;#$
4181: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4182: $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;
4183: $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;
4184: $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;
4185: $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;
4186: $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;
4187: $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;
4188: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4189: #remove some other LaTeX command
4190: $garbage=~s|\\(\w+)\\|\\|g;
4191: $garbage=~s|\\(\w+)(\s*)|$2|g;
4192: $garbage=~s|\+|11|g;
4193: my $value=length($garbage);
4194: return $value;
4195: }
4196:
4197:
4198: # is_inside_of $tagstack $tag
4199: # This sub returns true if the current state of Xml processing
4200: # is inside of the tag.
4201: # Parameters:
4202: # tagstack - The tagstack from the parser.
4203: # tag - The tag (without the <>'s.).
4204: # Sample usage:
4205: # if (is_inside_of($tagstack "table")) {
4206: # # I'm in a table....
4207: # }
4208: sub is_inside_of {
4209: my ($tagstack, $tag) = @_;
4210: my @stack = @$tagstack;
4211: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4212: if ($stack[$i] eq $tag) {
4213: return 1;
4214: }
4215: }
4216: return 0;
4217: }
4218:
4219:
4220: 1;
4221: __END__
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