1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.292 2005/11/03 21:58:11 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:
52: BEGIN {
53:
54: &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'));
55:
56: }
57:
58:
59: sub initialize_londefdef {
60: $Apache::londefdef::TD_redirection=0;
61: @Apache::londefdef::table = ();
62: $Apache::londefdef::select=0;
63: undef(@Apache::londefdef::description);
64: @Apache::londefdef::DD=(0);
65: @Apache::londefdef::DT=(0);
66: @Apache::londefdef::seenDT=(0);
67: $Apache::londefdef::list_index=0;
68: }
69:
70: #======================= TAG SUBROUTINES =====================
71: #-- <output>
72: sub start_output {
73: my ($target) = @_;
74: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
75: return '';
76: }
77: sub end_output {
78: my ($target) = @_;
79: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
80: return '';
81: }
82: #-- <m> tag
83: sub start_m {
84: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
85: my $currentstring = '';
86: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
87: if ($target eq 'web' || $target eq 'analyze') {
88: &Apache::lonxml::debug("M is starting with:$inside:");
89: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
90: if ($eval eq 'on') {
91: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
92: #&Apache::lonxml::debug("M is evaulated to:$inside:");
93: }
94: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
95: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
96: if ($Apache::lontexconvert::errorstring) {
97: &Apache::lonxml::warning("tth error: ".
98: $Apache::lontexconvert::errorstring);
99: $Apache::lontexconvert::errorstring='';
100: }
101: #&Apache::lonxml::debug("M is ends with:$currentstring:");
102: $Apache::lonxml::post_evaluate=0;
103: } elsif ($target eq 'tex') {
104: $currentstring = $inside;
105: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
106: if ($eval eq 'on') {
107: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
108: }
109: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
110: # detect simple math mode entry exits, and convert them
111: # to use \ensuremath
112: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
113: $currentstring=~s/^\$//;
114: $currentstring=~s/\$$//;
115: $currentstring='\ensuremath{'.$currentstring.'}';
116: }
117: $Apache::lonxml::post_evaluate=0;
118: }
119: return $currentstring;
120: }
121:
122: sub end_m {
123: my ($target,$token) = @_;
124: my $currentstring = '';
125: if ($target eq 'tex') {
126: $currentstring = "";
127: }
128: return $currentstring;
129: }
130:
131: sub start_tthoption {
132: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
133: my $result;
134: if ($target eq 'web') {
135: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser);
136: $inside=~s/^\s*//;
137: if ($env{'browser.mathml'}) {
138: &tth::ttmoptions($inside);
139: } else {
140: &tth::tthoptions($inside);
141: }
142: }
143: return $result;
144: }
145:
146: sub end_tthoption {
147: my ($target,$token) = @_;
148: my $result;
149: return $result;
150: }
151:
152: #-- <html> tag (end tag optional)
153: sub start_html {
154: my ($target,$token) = @_;
155: my $currentstring = '';
156: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
157: &Apache::lontexconvert::init_tth();
158: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
159: $currentstring = &Apache::lonxml::xmlbegin();
160: } elsif ($target eq 'tex') {
161: $currentstring .= '\documentclass[letterpaper]{article}';
162: if (($env{'form.latex_type'}=~'batchmode') ||
163: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
164: $currentstring .= '\newcommand{\keephidden}[1]{}'.
165: '\renewcommand{\deg}{$^{\circ}$}'.
166: '\usepackage{longtable}'.
167: '\usepackage{textcomp}'.
168: '\usepackage{makeidx}'.
169: '\usepackage[dvips]{graphicx}'.
170: '\usepackage{wrapfig}'.
171: '\usepackage{picins}'.
172: '\usepackage{epsfig}'.
173: '\usepackage{calc}'.
174: '\usepackage{amsmath}'.
175: '\usepackage{amssymb}'.
176: '\usepackage{amsfonts}'.
177: '\usepackage{amsthm}'.
178: '\usepackage{amscd}'.
179: '\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}}'.
180: '\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}}';
181: }
182: return $currentstring;
183: }
184:
185: sub end_html {
186: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
187: my $currentstring = '';
188: if ($target eq 'web') {
189: $currentstring = '</html>';
190: }
191: return $currentstring;
192: }
193:
194: #-- <head> tag (end tag optional)
195: sub start_head {
196: my ($target,$token) = @_;
197: my $currentstring = '';
198: if ($target eq 'web') {
199: $currentstring = $token->[4].&Apache::lonxml::fontsettings();
200: }
201: return $currentstring;
202: }
203:
204: sub end_head {
205: my ($target,$token) = @_;
206: my $currentstring = '';
207: if ($target eq 'web' && $env{'request.state'} eq 'published') {
208: $currentstring = &Apache::lonmenu::registerurl(undef,$target).
209: $token->[2];
210: }
211: return $currentstring;
212: }
213:
214: #-- <map> tag (end tag required)
215: sub start_map {
216: my ($target,$token) = @_;
217: my $currentstring = '';
218: if ($target eq 'web') {
219: $currentstring = $token->[4];
220: }
221: return $currentstring;
222: }
223:
224: sub end_map {
225: my ($target,$token) = @_;
226: my $currentstring = '';
227: if ($target eq 'web') {
228: $currentstring = $token->[2];
229: }
230: return $currentstring;
231: }
232:
233: #-- <select> tag (end tag required)
234: sub start_select {
235: my ($target,$token) = @_;
236: my $currentstring = '';
237: if ($target eq 'web') {
238: $currentstring = $token->[4];
239: } elsif ($target eq 'tex') {
240: $Apache::londefdef::select=0;
241: }
242: return $currentstring;
243: }
244:
245: sub end_select {
246: my ($target,$token) = @_;
247: my $currentstring = '';
248: if ($target eq 'web') {
249: $currentstring = $token->[2];
250: }
251: return $currentstring;
252: }
253:
254: #-- <option> tag (end tag optional)
255: sub start_option {
256: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
257: my $currentstring = '';
258: if ($target eq 'web') {
259: $currentstring = $token->[4];
260: } elsif ($target eq 'tex') {
261: $Apache::londefdef::select++;
262: if ($Apache::londefdef::select == 1) {
263: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
264: } else {
265: $currentstring='\keephidden{';
266: }
267: }
268: return $currentstring;
269: }
270:
271: sub end_option {
272: my ($target,$token) = @_;
273: my $currentstring = '';
274: if ($target eq 'web') {
275: $currentstring = $token->[2];
276: } elsif ($target eq 'tex') {
277: $currentstring='}';
278: }
279: return $currentstring;
280: }
281:
282: #-- <input> tag (end tag forbidden)
283: sub start_input {
284: my ($target,$token) = @_;
285: my $currentstring = '';
286: if ($target eq 'web') {
287: $currentstring = $token->[4];
288: }
289: return $currentstring;
290: }
291:
292: sub end_input {
293: my ($target,$token) = @_;
294: my $currentstring = '';
295: if ($target eq 'web') {
296: $currentstring = $token->[2];
297: }
298: return $currentstring;
299: }
300:
301: #-- <textarea> tag (end tag required)
302: sub start_textarea {
303: my ($target,$token) = @_;
304: my $currentstring = '';
305: if ($target eq 'web') {
306: $currentstring = $token->[4];
307: }
308: return $currentstring;
309: }
310:
311: sub end_textarea {
312: my ($target,$token) = @_;
313: my $currentstring = '';
314: if ($target eq 'web') {
315: $currentstring = $token->[2];
316: }
317: return $currentstring;
318: }
319:
320: #-- <form> tag (end tag required)
321: sub start_form {
322: my ($target,$token) = @_;
323: my $currentstring = '';
324: if ($target eq 'web') {
325: $currentstring = $token->[4];
326: }
327: return $currentstring;
328: }
329:
330: sub end_form {
331: my ($target,$token) = @_;
332: my $currentstring = '';
333: if ($target eq 'web') {
334: $currentstring = $token->[2];
335: }
336: return $currentstring;
337: }
338:
339: #-- <title> tag (end tag required)
340: sub start_title {
341: my ($target,$token) = @_;
342: my $currentstring = '';
343: if ($target eq 'web') {
344: $currentstring = $token->[4];
345: } elsif ($target eq 'tex') {
346: $currentstring .= '\keephidden{Title of the document: '
347: }
348: if ($target eq 'meta') {
349: $currentstring='<title>';
350: &start_output($target);
351: }
352: return $currentstring;
353: }
354:
355: sub end_title {
356: my ($target,$token) = @_;
357: my $currentstring = '';
358: if ($target eq 'web') {
359: $currentstring = $token->[2];
360: } elsif ($target eq 'tex') {
361: $currentstring .= '}';
362: }
363: if ($target eq 'meta') {
364: &end_output($target);
365: $currentstring='</title>';
366: }
367: return $currentstring;
368: }
369:
370: #-- <meta> tag (end tag forbidden)
371: sub start_meta {
372: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
373: my $currentstring = '';
374: if ($target eq 'web') {
375: my $args='';
376: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
377: if ($args eq '') {
378: &Apache::lonxml::get_all_text("/meta",$parser);
379: } else {
380: $currentstring = $token->[4];
381: }
382: } elsif ($target eq 'meta') {
383: unless (&Apache::lonxml::get_param
384: ('http-equiv',$parstack,$safeeval,undef,1)) {
385: my $name=$token->[2]->{'name'};
386: $name=~tr/A-Z/a-z/;
387: $name=~s/\s/\_/gs;
388: $name=~s/\W//gs;
389: if ($name) {
390: $currentstring='<'.$name;
391: my $display=&Apache::lonxml::get_param
392: ('display',$parstack,$safeeval,undef,1);
393: if ($display) {
394: $display=~s/\"/\'/g;
395: $currentstring.=' display="'.$display.'"';
396: }
397: $currentstring.='>'.
398: &Apache::lonxml::get_param
399: ('content',$parstack,$safeeval,undef,1).
400: '</'.$name.'>';
401: }
402: my $display=&Apache::lonxml::get_param
403: ('display',$parstack,$safeeval,undef,1);
404: if ($display) {
405: $display=&HTML::Entities::encode($display,'<>&"');
406: $currentstring.='<'.$name.'.display>'.$display.
407: '</'.$name.'.display>';
408: }
409: }
410: } elsif ($target eq 'tex') {
411: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
412: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
413: if ((not defined $content) && (not defined $name)) {
414: &Apache::lonxml::startredirection();
415: }
416: }
417: return $currentstring;
418: }
419:
420: sub end_meta {
421: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
422: my $currentstring = '';
423: if ($target eq 'web') {
424: my $args='';
425: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
426: if ($args ne '') {
427: $currentstring = $token->[4];
428: }
429: } elsif ($target eq 'tex') {
430: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
431: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
432: if ((not defined $content) && (not defined $name)) {
433: &Apache::lonxml::endredirection();
434: }
435: }
436: return $currentstring;
437: }
438:
439: # accessrule
440: sub start_accessrule {
441: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
442: my $currentstring = '';
443: my $eff=&Apache::lonxml::get_param
444: ('effect',$parstack,$safeeval,undef,1);
445: my $realm=&Apache::lonxml::get_param
446: ('realm',$parstack,$safeeval,undef,1);
447: my $role=&Apache::lonxml::get_param
448: ('role',$parstack,$safeeval,undef,1);
449: $realm=~s/\s+//g;
450: $realm=~s/\//\_/g;
451: $realm=~s/^\_//;
452: $realm=~s/\W/\;/g;
453: $role=~s/\s+//g;
454: $role=~s/\//\_/g;
455: $role=~s/\W/\;/g;
456: if ($target eq 'web') {
457: my $args='';
458: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
459: if ($args eq '') {
460: &Apache::lonxml::get_all_text("/accessrule",$parser);
461: } else {
462: $currentstring = $token->[4];
463: }
464: }
465: if ($target eq 'meta') {
466: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
467: }
468: return $currentstring;
469: }
470:
471: sub end_accessrule {
472: my ($target,$token,$tagstack,$parstack,$parser) = @_;
473: my $currentstring = '';
474: if ($target eq 'web') {
475: my $args='';
476: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
477: if ($args ne '') {
478: $currentstring = $token->[4];
479: }
480: }
481: return $currentstring;
482: }
483:
484: #-- <body> tag (end tag required)
485: sub start_body {
486: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
487: my $currentstring = '';
488:
489: if ($target eq 'web') {
490: if ($Apache::lonhomework::parsing_a_problem) {
491: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
492: return '';
493: }
494: if (!$Apache::lonxml::registered &&
495: $env{'request.state'} eq 'published') {
496: $currentstring.='<head>'.
497: &Apache::lonmenu::registerurl(undef,$target).'</head>';
498: }
499: # Accessibility
500: if ($env{'browser.imagesuppress'} eq 'on') {
501: delete($token->[2]->{'background'});
502: }
503: if ($env{'browser.fontenhance'} eq 'on') {
504: my $style='';
505: foreach my $key (keys(%{$token->[2]})) {
506: if ($key =~ /^style$/i) {
507: $style.=$token->[2]->{$key}.';';
508: delete($token->[2]->{$key});
509: }
510: }
511: $token->[2]->{'style'}=$style.'; font-size: x-large;';
512: }
513: if ($env{'browser.blackwhite'} eq 'on') {
514: delete($token->[2]->{'font'});
515: delete($token->[2]->{'link'});
516: delete($token->[2]->{'alink'});
517: delete($token->[2]->{'vlink'});
518: delete($token->[2]->{'bgcolor'});
519: delete($token->[2]->{'background'});
520: }
521: # Overload loads
522: my $onLoad='';
523: foreach my $key (keys(%{$token->[2]})) {
524: if ($key =~ /^onload$/i) {
525: $onLoad.=$token->[2]->{$key}.';';
526: delete($token->[2]->{$key});
527: }
528: }
529: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
530: my $onUnload='';
531: foreach my $key (keys(%{$token->[2]})) {
532: if ($key =~ /^onunload$/i) {
533: $onUnload.=$token->[2]->{$key}.';';
534: delete($token->[2]->{$key});
535: }
536: }
537: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
538: ';'.$onUnload;
539:
540: $currentstring .= '<'.$token->[1];
541: foreach (keys %{$token->[2]}) {
542: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
543: }
544: $currentstring.='>';
545: &Apache::lontexconvert::jsMath_reset();
546: if ($env{'environment.texengine'} eq 'jsMath') {
547: $currentstring.=&Apache::lontexconvert::jsMath_header();
548: }
549: if ($env{'request.state'} ne 'published') {
550: if ($env{'environment.remote'} eq 'off') {
551: $currentstring.=
552: &Apache::lonmenu::constspaceform().
553: &Apache::lonmenu::menubuttons(1,'web',1);
554: }
555: $currentstring.=(<<EDITBUTTON);
556: <form method="post">
557: <input type="submit" name="editmode" accesskey="e" value="Edit" />
558: </form>
559: EDITBUTTON
560: } else {
561: $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
562: }
563: $currentstring.=&Apache::lonxml::message_location();
564: } elsif ($target eq 'tex') {
565: $currentstring = '\begin{document}';
566: }
567: return $currentstring;
568: }
569:
570: sub end_body {
571: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
572: my $currentstring = &end_p(); # Close off unclosed <p>
573: if ($target eq 'web') {
574: $currentstring .= &Apache::lonxml::xmlend($target,$parser);
575: } elsif ($target eq 'tex') {
576: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
577: }
578: return $currentstring;
579: }
580:
581: #-- <center> tag (end tag required)
582: sub start_center {
583: my ($target,$token) = @_;
584: my $currentstring = &end_p(); # Close off any prior para.
585: if ($target eq 'web') {
586: $currentstring .= $token->[4];
587: } elsif ($target eq 'tex') {
588: $currentstring .= '\begin{center}';
589: }
590: return $currentstring;
591: }
592:
593: sub end_center {
594: my ($target,$token) = @_;
595: my $currentstring = '';
596: if ($target eq 'web') {
597: $currentstring = $token->[2];
598: } elsif ($target eq 'tex') {
599: $currentstring = '\end{center}';
600: }
601: return $currentstring;
602: }
603:
604: #-- <b> tag (end tag required)
605: # NOTE: In TeX mode disables internal <p>
606: sub start_b {
607: my ($target,$token) = @_;
608: my $currentstring = '';
609: if ($target eq 'web') {
610: $currentstring = $token->[4];
611: } elsif ($target eq 'tex') {
612: &disable_para();
613: $currentstring .= '\textbf{';
614: }
615: return $currentstring;
616: }
617:
618: sub end_b {
619: my ($target,$token) = @_;
620: my $currentstring = '';
621: if ($target eq 'web') {
622: $currentstring = $token->[2];
623: } elsif ($target eq 'tex') {
624: &enable_para();
625: $currentstring = '}';
626: }
627: return $currentstring;
628: }
629:
630: #-- <strong> tag (end tag required)
631: # NOTE: in TeX mode disables internal <p>
632: sub start_strong {
633: my ($target,$token) = @_;
634: my $currentstring = '';
635: if ($target eq 'web') {
636: $currentstring = $token->[4];
637: } elsif ($target eq 'tex') {
638: &disable_para();
639: $currentstring = '\textbf{';
640: }
641: return $currentstring;
642: }
643:
644: sub end_strong {
645: my ($target,$token) = @_;
646: my $currentstring = '';
647: if ($target eq 'web') {
648: $currentstring = $token->[2];
649: } elsif ($target eq 'tex') {
650: &enable_para();
651: $currentstring = '}';
652: }
653: return $currentstring;
654: }
655:
656: #-- <h1> tag (end tag required)
657: sub start_h1 {
658: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
659: my $currentstring = &end_p(); # Close off any prior para.
660: if ($target eq 'web') {
661: $currentstring .= $token->[4];
662: } elsif ($target eq 'tex') {
663: my $pre;
664: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
665: if ($align eq 'center') {
666: $pre='\begin{center}';
667: } elsif ($align eq 'left') {
668: $pre='\rlap{';
669: } elsif ($align eq 'right') {
670: $pre=' \hfill \llap{';
671: }
672: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
673: if (not defined $TeXsize) {$TeXsize="large";}
674: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
675: } elsif ($target eq 'meta') {
676: $currentstring.='<subject>';
677: &start_output($target);
678: }
679: return $currentstring;
680: }
681:
682: sub end_h1 {
683: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
684: my $currentstring = '';
685: if ($target eq 'web') {
686: $currentstring .= $token->[2];
687: } elsif ($target eq 'tex') {
688: my $post='\vskip 0 mm ';
689: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
690: if ($align eq 'center') {
691: $post='\end{center}';
692: } elsif ($align eq 'left') {
693: $post='} \hfill'.'\vskip 0 mm ';
694: } elsif ($align eq 'right') {
695: $post='}'.'\vskip 0 mm ';
696: }
697: $currentstring .= '}}'.$post;
698: } elsif ($target eq 'meta') {
699: &end_output($target);
700: $currentstring='</subject>';
701: }
702: return $currentstring;
703: }
704:
705: #-- <h2> tag
706: sub start_h2 {
707: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
708: my $currentstring = &end_p(); # Close off any prior para.
709: if ($target eq 'web') {
710: $currentstring .= $token->[4];
711: } elsif ($target eq 'tex') {
712: my $pre;
713: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
714: if ($align eq 'center') {
715: $pre='\begin{center}';
716: } elsif ($align eq 'left') {
717: $pre='\rlap{';
718: } elsif ($align eq 'right') {
719: $pre=' \hfill \llap{';
720: }
721: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
722: if (not defined $TeXsize) {$TeXsize="large";}
723: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
724: }
725: return $currentstring;
726: }
727:
728: sub end_h2 {
729: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
730: my $currentstring = '';
731: if ($target eq 'web') {
732: $currentstring .= $token->[2];
733: } elsif ($target eq 'tex') {
734: my $post='\vskip 0 mm ';
735: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
736: if ($align eq 'center') {
737: $post='\end{center}';
738: } elsif ($align eq 'left') {
739: $post='} \hfill'.'\vskip 0 mm ';
740: } elsif ($align eq 'right') {
741: $post='}'.'\vskip 0 mm ';
742: }
743: $currentstring .= '}}'.$post;
744: }
745: return $currentstring;
746: }
747:
748: #-- <h3> tag
749: sub start_h3 {
750: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
751: my $currentstring = &end_p(); # Close off any prior para.
752: if ($target eq 'web') {
753: $currentstring .= $token->[4];
754: } elsif ($target eq 'tex') {
755: my $pre;
756: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
757: if ($align eq 'center') {
758: $pre='\begin{center}';
759: } elsif ($align eq 'left') {
760: $pre='\rlap{';
761: } elsif ($align eq 'right') {
762: $pre=' \hfill \llap{';
763: }
764: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
765: if (not defined $TeXsize) {$TeXsize="large";}
766: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
767: }
768: return $currentstring;
769: }
770:
771: sub end_h3 {
772: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
773: my $currentstring = '';
774: if ($target eq 'web') {
775: $currentstring .= $token->[2];
776: } elsif ($target eq 'tex') {
777: my $post='\vskip 0 mm ';
778: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
779: if ($align eq 'center') {
780: $post='\end{center}';
781: } elsif ($align eq 'left') {
782: $post='} \hfill'.'\vskip 0 mm ';
783: } elsif ($align eq 'right') {
784: $post='}'.'\vskip 0 mm ';
785: }
786: $currentstring .= '}}'.$post;
787: }
788: return $currentstring;
789: }
790:
791: #-- <h4> tag
792: sub start_h4 {
793: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
794: my $currentstring = &end_p(); # Close off any prior para.
795: if ($target eq 'web') {
796: $currentstring .= $token->[4];
797: } elsif ($target eq 'tex') {
798: my $pre;
799: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
800: if ($align eq 'center') {
801: $pre='\begin{center}';
802: } elsif ($align eq 'left') {
803: $pre='\rlap{';
804: } elsif ($align eq 'right') {
805: $pre=' \hfill \llap{';
806: }
807: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
808: if (not defined $TeXsize) {$TeXsize="large";}
809: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
810: }
811: return $currentstring;
812: }
813:
814: sub end_h4 {
815: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
816: my $currentstring = '';
817: if ($target eq 'web') {
818: $currentstring .= $token->[2];
819: } elsif ($target eq 'tex') {
820: my $post='\vskip 0 mm ';
821: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
822: if ($align eq 'center') {
823: $post='\end{center}';
824: } elsif ($align eq 'left') {
825: $post='} \hfill'.'\vskip 0 mm ';
826: } elsif ($align eq 'right') {
827: $post='}'.'\vskip 0 mm ';
828: }
829: $currentstring .= '}}'.$post;
830: }
831: return $currentstring;
832: }
833:
834: #-- <h5> tag
835: sub start_h5 {
836: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
837: my $currentstring = &end_p(); # Close off any prior paras.
838: if ($target eq 'web') {
839: $currentstring .= $token->[4];
840: } elsif ($target eq 'tex') {
841: my $pre;
842: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
843: if ($align eq 'center') {
844: $pre='\begin{center}';
845: } elsif ($align eq 'left') {
846: $pre='\rlap{';
847: } elsif ($align eq 'right') {
848: $pre=' \hfill \llap{';
849: }
850: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
851: if (not defined $TeXsize) {$TeXsize="large";}
852: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
853: }
854: return $currentstring;
855: }
856:
857: sub end_h5 {
858: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
859: my $currentstring = '';
860: if ($target eq 'web') {
861: $currentstring .= $token->[2];
862: } elsif ($target eq 'tex') {
863: my $post='\vskip 0 mm ';
864: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
865: if ($align eq 'center') {
866: $post='\end{center}';
867: } elsif ($align eq 'left') {
868: $post='} \hfill'.'\vskip 0 mm ';
869: } elsif ($align eq 'right') {
870: $post='}'.'\vskip 0 mm ';
871: }
872: $currentstring .= '}}'.$post;
873: }
874: return $currentstring;
875: }
876:
877: #-- <h6> tag
878: sub start_h6 {
879: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
880: my $currentstring = &end_p(); # Close off any prior paras.
881: if ($target eq 'web') {
882: $currentstring .= $token->[4];
883: } elsif ($target eq 'tex') {
884: my $pre;
885: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
886: if ($align eq 'center') {
887: $pre='\begin{center}';
888: } elsif ($align eq 'left') {
889: $pre='\rlap{';
890: } elsif ($align eq 'right') {
891: $pre=' \hfill \llap{';
892: }
893: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
894: if (not defined $TeXsize) {$TeXsize="large";}
895: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
896: }
897: return $currentstring;
898: }
899:
900: sub end_h6 {
901: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
902: my $currentstring = '';
903: if ($target eq 'web') {
904: $currentstring .= $token->[2];
905: } elsif ($target eq 'tex') {
906: my $post='\vskip 0 mm ';
907: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
908: if ($align eq 'center') {
909: $post='\end{center}';
910: } elsif ($align eq 'left') {
911: $post='} \hfill'.'\vskip 0 mm ';
912: } elsif ($align eq 'right') {
913: $post='}'.'\vskip 0 mm ';
914: }
915: $currentstring .= '}}'.$post;
916: }
917: return $currentstring;
918: }
919:
920: #--- <cite> tag (end tag required)
921: sub start_cite {
922: my ($target,$token) = @_;
923: my $currentstring = '';
924: if ($target eq 'web') {
925: $currentstring .= $token->[4];
926: } elsif ($target eq 'tex') {
927: $currentstring .= '\textit{';
928: }
929: return $currentstring;
930: }
931:
932: sub end_cite {
933: my ($target,$token) = @_;
934: my $currentstring = '';
935: if ($target eq 'web') {
936: $currentstring .= $token->[2];
937: } elsif ($target eq 'tex') {
938: $currentstring .= '}';
939: }
940: return $currentstring;
941: }
942:
943: #-- <i> tag (end tag required)
944: sub start_i {
945: my ($target,$token) = @_;
946: my $currentstring = '';
947: if ($target eq 'web') {
948: $currentstring .= $token->[4];
949: } elsif ($target eq 'tex') {
950: $currentstring .= '\textit{';
951: }
952: return $currentstring;
953: }
954:
955: sub end_i {
956: my ($target,$token) = @_;
957: my $currentstring = '';
958: if ($target eq 'web') {
959: $currentstring .= $token->[2];
960: } elsif ($target eq 'tex') {
961: $currentstring .= '}';
962: }
963: return $currentstring;
964: }
965:
966: #-- <address> tag (end tag required)
967: sub start_address {
968: my ($target,$token) = @_;
969: my $currentstring = '';
970: if ($target eq 'web') {
971: $currentstring .= $token->[4];
972: } elsif ($target eq 'tex') {
973: $currentstring .= '\textit{';
974: }
975: return $currentstring;
976: }
977:
978: sub end_address {
979: my ($target,$token) = @_;
980: my $currentstring = '';
981: if ($target eq 'web') {
982: $currentstring .= $token->[2];
983: } elsif ($target eq 'tex') {
984: $currentstring .= '}';
985: }
986: return $currentstring;
987: }
988:
989: #-- <dfn> tag (end tag required)
990: sub start_dfn {
991: my ($target,$token) = @_;
992: my $currentstring = '';
993: if ($target eq 'web') {
994: $currentstring .= $token->[4];
995: } elsif ($target eq 'tex') {
996: $currentstring .= '\textit{';
997: }
998: return $currentstring;
999: }
1000:
1001: sub end_dfn {
1002: my ($target,$token) = @_;
1003: my $currentstring = '';
1004: if ($target eq 'web') {
1005: $currentstring .= $token->[2];
1006: } elsif ($target eq 'tex') {
1007: $currentstring .= '}';
1008: }
1009: return $currentstring;
1010: }
1011:
1012: #-- <tt> tag (end tag required)
1013: sub start_tt {
1014: my ($target,$token) = @_;
1015: my $currentstring = '';
1016: if ($target eq 'web') {
1017: $currentstring .= $token->[4];
1018: } elsif ($target eq 'tex') {
1019: $currentstring .= '\texttt{';
1020: }
1021: return $currentstring;
1022: }
1023:
1024: sub end_tt {
1025: my ($target,$token) = @_;
1026: my $currentstring = '';
1027: if ($target eq 'web') {
1028: $currentstring .= $token->[2];
1029: } elsif ($target eq 'tex') {
1030: $currentstring .= '}';
1031: }
1032: return $currentstring;
1033: }
1034:
1035: #-- <kbd> tag (end tag required)
1036: sub start_kbd {
1037: my ($target,$token) = @_;
1038: my $currentstring = '';
1039: if ($target eq 'web') {
1040: $currentstring .= $token->[4];
1041: } elsif ($target eq 'tex') {
1042: $currentstring .= '\texttt{';
1043: }
1044: return $currentstring;
1045: }
1046:
1047: sub end_kbd {
1048: my ($target,$token) = @_;
1049: my $currentstring = '';
1050: if ($target eq 'web') {
1051: $currentstring .= $token->[2];
1052: } elsif ($target eq 'tex') {
1053: $currentstring .= '}';
1054: }
1055: return $currentstring;
1056: }
1057:
1058: #-- <code> tag (end tag required)
1059: sub start_code {
1060: my ($target,$token) = @_;
1061: my $currentstring = '';
1062: if ($target eq 'web') {
1063: $currentstring .= $token->[4];
1064: } elsif ($target eq 'tex') {
1065: $currentstring .= '\texttt{';
1066: }
1067: return $currentstring;
1068: }
1069:
1070: sub end_code {
1071: my ($target,$token) = @_;
1072: my $currentstring = '';
1073: if ($target eq 'web') {
1074: $currentstring .= $token->[2];
1075: } elsif ($target eq 'tex') {
1076: $currentstring .= '}';
1077: }
1078: return $currentstring;
1079: }
1080:
1081: #-- <em> tag (end tag required)
1082: sub start_em {
1083: my ($target,$token) = @_;
1084: my $currentstring = '';
1085: if ($target eq 'web') {
1086: $currentstring .= $token->[4];
1087: } elsif ($target eq 'tex') {
1088: $currentstring .= '\emph{';
1089: }
1090: return $currentstring;
1091: }
1092:
1093: sub end_em {
1094: my ($target,$token) = @_;
1095: my $currentstring = '';
1096: if ($target eq 'web') {
1097: $currentstring .= $token->[2];
1098: } elsif ($target eq 'tex') {
1099: $currentstring .= '}';
1100: }
1101: return $currentstring;
1102: }
1103:
1104: #-- <q> tag (end tag required)
1105: sub start_q {
1106: my ($target,$token) = @_;
1107: my $currentstring = '';
1108: if ($target eq 'web') {
1109: $currentstring .= $token->[4];
1110: } elsif ($target eq 'tex') {
1111: $currentstring .= '\emph{';
1112: }
1113: return $currentstring;
1114: }
1115:
1116: sub end_q {
1117: my ($target,$token) = @_;
1118: my $currentstring = '';
1119: if ($target eq 'web') {
1120: $currentstring .= $token->[2];
1121: } elsif ($target eq 'tex') {
1122: $currentstring .= '}';
1123: }
1124: return $currentstring;
1125: }
1126:
1127: # <p> is a bit strange since it does not require a closing </p>
1128: # However in latex, we must often output closing stuff to end
1129: # environments and {}'s etc. Therefore we do all the work
1130: # of figuring out the ending strings in the start tag processing,
1131: # and provide a mechanism to output the stop text external
1132: # to tag processing.
1133: #
1134: {
1135:
1136: my $closing_string = ''; # String required to close <p>
1137:
1138: # Some tags are <p> fragile meaning that <p> inside of them
1139: # does not work within TeX mode. This is managed via the
1140: # counter below:
1141: #
1142:
1143: my $para_disabled = 0;
1144:
1145: sub disable_para {
1146: $para_disabled++;
1147: }
1148: sub enable_para {
1149: $para_disabled--;
1150: }
1151:
1152:
1153: #-- <p> tag (end tag optional)
1154: #optional attribute - align="center|left|right"
1155: sub start_p {
1156: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1157: my $currentstring = '';
1158: if ($target eq 'web') {
1159: $currentstring .= &end_p(); # close off prior para if in progress.
1160: $currentstring .= $token->[4];
1161: if (! ($currentstring =~ /\//)) {
1162: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1163: }
1164: } elsif ($target eq 'tex' && !$para_disabled) {
1165: $currentstring .= &end_p(); # close off prior para if in progress.
1166: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1167: if ($align eq 'center') {
1168: $currentstring .='\begin{center}\par';
1169: $closing_string = '\end{center}';
1170: } elsif ($align eq 'right') {
1171: $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1172: $closing_string= '}}';
1173: } elsif ($align eq 'left') {
1174: $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{\rlap{';
1175: $closing_string = '}\hfill}';
1176: } else {
1177: $currentstring.='\par ';
1178: $closing_string = '\strut\\\\\strut ';
1179: }
1180:
1181: }
1182: return $currentstring;
1183: }
1184: #
1185: # End paragraph processing just requires that we output the
1186: # closing string that was saved and blank it.
1187: sub end_p {
1188: # Note only 'tex' mode uses disable_para and enable_para
1189: # so we don't need to know the target in the check below:
1190:
1191: if (!$para_disabled) {
1192: my $current_string = $closing_string;
1193: $closing_string = ''; # Not in a para anymore.
1194: return $current_string;
1195: } else {
1196: return '';
1197: }
1198:
1199: }
1200: }
1201: #-- <br> tag (end tag forbidden)
1202: sub start_br {
1203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1204: my $currentstring = '';
1205: if ($target eq 'web') {
1206: $currentstring .= $token->[4];
1207: } elsif ($target eq 'tex') {
1208: my @tempo=@$tagstack;
1209: my $signal=0;
1210: # Not going to factor this to is_inside_of since that would require
1211: # multiple stack traversals.
1212: #
1213: for (my $i=$#tempo;$i>=0;$i--) {
1214: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1215: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1216: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1217: $signal=1;
1218: last;
1219: }
1220: }
1221: if ($signal) {
1222: $currentstring .= ' \vskip 0 mm ';
1223: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1224: $currentstring .= '\strut \\\\ \strut ';
1225: }
1226: }
1227: return $currentstring;
1228: }
1229:
1230: sub end_br {
1231: my ($target,$token) = @_;
1232: my $currentstring = '';
1233: if ($target eq 'web') {
1234: $currentstring .= $token->[2];
1235: }
1236: return $currentstring;
1237: }
1238:
1239: #-- <big> tag (end tag required)
1240: sub start_big {
1241: my ($target,$token) = @_;
1242: my $currentstring = '';
1243: if ($target eq 'web') {
1244: $currentstring .= $token->[4];
1245: } elsif ($target eq 'tex') {
1246: $currentstring .= '{\large ';
1247: }
1248: return $currentstring;
1249: }
1250:
1251: sub end_big {
1252: my ($target,$token) = @_;
1253: my $currentstring = '';
1254: if ($target eq 'web') {
1255: $currentstring .= $token->[2];
1256: } elsif ($target eq 'tex') {
1257: $currentstring .= '}';
1258: }
1259: return $currentstring;
1260: }
1261:
1262: #-- <small> tag (end tag required)
1263: sub start_small {
1264: my ($target,$token) = @_;
1265: my $currentstring = '';
1266: if ($target eq 'web') {
1267: $currentstring .= $token->[4];
1268: } elsif ($target eq 'tex') {
1269: $currentstring .= '{\footnotesize ';
1270: }
1271: return $currentstring;
1272: }
1273:
1274: sub end_small {
1275: my ($target,$token) = @_;
1276: my $currentstring = '';
1277: if ($target eq 'web') {
1278: $currentstring .= $token->[2];
1279: } elsif ($target eq 'tex') {
1280: $currentstring .= '}';
1281: }
1282: return $currentstring;
1283: }
1284:
1285: #-- <basefont> tag (end tag forbidden)
1286: sub start_basefont {
1287: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1288: my $currentstring = '';
1289: if ($target eq 'web') {
1290: $currentstring = $token->[4];
1291: } elsif ($target eq 'tex') {
1292: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1293: if (defined $basesize) {
1294: $currentstring = '{\\'.$basesize.' ';
1295: }
1296: }
1297: return $currentstring;
1298: }
1299:
1300: sub end_basefont {
1301: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1302: my $currentstring = '';
1303: if ($target eq 'web') {
1304: $currentstring = $token->[4];
1305: } elsif ($target eq 'tex') {
1306: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1307: if (defined $basesize) {
1308: $currentstring = '}';
1309: }
1310: }
1311: return $currentstring;
1312: }
1313:
1314: #-- <font> tag (end tag required)
1315: sub start_font {
1316: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1317: my $currentstring = '';
1318: if ($target eq 'web') {
1319: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1320: if ($face!~/symbol/i) {
1321: if (($env{'browser.fontenhance'} eq 'on') ||
1322: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1323: }
1324: $currentstring = $token->[4];
1325: } elsif ($target eq 'tex') {
1326: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1327: if (defined $fontsize) {
1328: $currentstring = '{\\'.$fontsize.' ';
1329: }
1330: }
1331: return $currentstring;
1332: }
1333:
1334: sub end_font {
1335: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1336: my $currentstring = '';
1337: if ($target eq 'web') {
1338: $currentstring = $token->[2];
1339: } elsif ($target eq 'tex') {
1340: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1341: if (defined $fontsize) {
1342: $currentstring = '}';
1343: }
1344: }
1345: return $currentstring;
1346: }
1347:
1348: #-- <strike> tag (end tag required)
1349: sub start_strike {
1350: my ($target,$token) = @_;
1351: my $currentstring = '';
1352: if ($target eq 'web') {
1353: $currentstring .= $token->[4];
1354: } elsif ($target eq 'tex') {
1355: &Apache::lonxml::startredirection();
1356: }
1357: return $currentstring;
1358: }
1359:
1360: sub end_strike {
1361: my ($target,$token) = @_;
1362: my $currentstring = '';
1363: if ($target eq 'web') {
1364: $currentstring .= $token->[2];
1365: } elsif ($target eq 'tex') {
1366: $currentstring=&Apache::lonxml::endredirection();
1367: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1368: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1369: $currentstring=~s/(\S)\s*$/$1\}/;
1370: }
1371: return $currentstring;
1372: }
1373:
1374: #-- <s> tag (end tag required)
1375: sub start_s {
1376: my ($target,$token) = @_;
1377: my $currentstring = '';
1378: if ($target eq 'web') {
1379: $currentstring .= $token->[4];
1380: } elsif ($target eq 'tex') {
1381: &Apache::lonxml::startredirection();
1382: }
1383: return $currentstring;
1384: }
1385:
1386: sub end_s {
1387: my ($target,$token) = @_;
1388: my $currentstring = '';
1389: if ($target eq 'web') {
1390: $currentstring .= $token->[2];
1391: } elsif ($target eq 'tex') {
1392: $currentstring=&Apache::lonxml::endredirection();
1393: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1394: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1395: $currentstring=~s/(\S)\s*$/$1\}/;
1396: }
1397: return $currentstring;
1398: }
1399:
1400: #-- <sub> tag (end tag required)
1401: sub start_sub {
1402: my ($target,$token) = @_;
1403: my $currentstring = '';
1404: if ($target eq 'web') {
1405: $currentstring .= $token->[4];
1406: } elsif ($target eq 'tex') {
1407: $currentstring .= '\ensuremath{_{';
1408: }
1409: return $currentstring;
1410: }
1411:
1412: sub end_sub {
1413: my ($target,$token) = @_;
1414: my $currentstring = '';
1415: if ($target eq 'web') {
1416: $currentstring .= $token->[2];
1417: } elsif ($target eq 'tex') {
1418: $currentstring .= '}}';
1419: }
1420: return $currentstring;
1421: }
1422:
1423: #-- <sup> tag (end tag required)
1424: sub start_sup {
1425: my ($target,$token) = @_;
1426: my $currentstring = '';
1427: if ($target eq 'web') {
1428: $currentstring .= $token->[4];
1429: } elsif ($target eq 'tex') {
1430: $currentstring .= '\ensuremath{^{';
1431: }
1432: return $currentstring;
1433: }
1434:
1435: sub end_sup {
1436: my ($target,$token) = @_;
1437: my $currentstring = '';
1438: if ($target eq 'web') {
1439: $currentstring .= $token->[2];
1440: } elsif ($target eq 'tex') {
1441: $currentstring .= '}}';
1442: }
1443: return $currentstring;
1444: }
1445:
1446: #-- <hr> tag (end tag forbidden)
1447: sub start_hr {
1448: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1449: my $currentstring = &end_p(); # End enclosing para.
1450: if ($target eq 'web') {
1451: $currentstring .= $token->[4];
1452: } elsif ($target eq 'tex') {
1453: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1454: if (defined $LaTeXwidth) {
1455: if ($LaTeXwidth=~/^%/) {
1456: substr($LaTeXwidth,0,1)='';
1457: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1458: }
1459: } else {
1460: $LaTeXwidth ='0.9\textwidth';
1461: }
1462: my ($pre,$post);
1463: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1464: if (($align eq 'center') || (not defined $align)) {
1465: $pre=''; $post='';
1466: } elsif ($align eq 'left') {
1467: $pre='\rlap{'; $post='} \hfill';
1468: } elsif ($align eq 'right') {
1469: $pre=' \hfill \llap{'; $post='}';
1470: }
1471: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1472: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1473: }
1474: return $currentstring;
1475: }
1476:
1477: sub end_hr {
1478: my ($target,$token) = @_;
1479: my $currentstring = '';
1480: if ($target eq 'web') {
1481: $currentstring .= $token->[2];
1482: }
1483: return $currentstring;
1484: }
1485:
1486: #-- <div> tag (end tag required)
1487: {
1488:
1489: # Since div can be nested, the stack below is used
1490: # in 'tex' mode to store the ending strings
1491: # for the div stack.
1492:
1493: my @div_end_stack;
1494:
1495: sub start_div {
1496: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1497: my $currentstring = &end_p(); # Close enclosing para.
1498: if ($target eq 'web') {
1499: $currentstring .= $token->[4];
1500: }
1501: if ($target eq 'tex') {
1502: # 4 possible alignments: left, right, center, and -missing-.
1503:
1504: my $endstring = '';
1505:
1506: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1507: $safeeval, undef, 1));
1508: if ($align eq 'center') {
1509: $currentstring .= '\begin{center}';
1510: $endstring = '\end{center}';
1511: }
1512: elsif ($align eq 'right') {
1513: $currentstring .= '\begin{flushright}';
1514: $endstring .= '\end{flushright}';
1515: } elsif ($align eq 'left') {
1516: $currentstring .= '\begin{flushleft}';
1517: $endstring = '\end{flushleft}';
1518: } else {
1519:
1520: }
1521: $currentstring .= "\n"; # For human readability.
1522: $endstring = "\n$endstring\n"; # For human readability
1523: push(@div_end_stack, $endstring);
1524: }
1525: return $currentstring;
1526: }
1527:
1528: sub end_div {
1529: my ($target,$token) = @_;
1530: my $currentstring = '';
1531: if ($target eq 'web') {
1532: $currentstring .= $token->[2];
1533: }
1534: if ($target eq 'tex') {
1535: my $endstring = pop @div_end_stack;
1536: $currentstring .= $endstring;
1537: }
1538: return $currentstring;
1539: }
1540: }
1541:
1542: #-- <a> tag (end tag required)
1543: sub start_a {
1544: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1545: my $currentstring = '';
1546: if ($target eq 'web') {
1547: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1548: undef,1);
1549: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1550: } elsif ($target eq 'tex') {
1551: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1552: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1553: if ($a=~/\S/) {
1554: $a=~s/([^\\])%/$1\\\%/g;
1555: $currentstring .= '\ref{URI: '.$a.'}';
1556: } elsif ($b=~/\S/) {
1557: $currentstring .= '\ref{Anchor: '.$b.'}';
1558: } else {
1559: $currentstring.='';
1560: }
1561: }
1562: return $currentstring;
1563: }
1564:
1565: sub end_a {
1566: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1567: my $currentstring = '';
1568: if ($target eq 'web') {
1569: $currentstring .= $token->[2];
1570: }
1571: return $currentstring;
1572: }
1573:
1574: #-- <li> tag (end tag optional)
1575: sub start_li {
1576: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1577: my $currentstring = '';
1578: if ($target eq 'web') {
1579: $currentstring = $token->[4];
1580: } elsif ($target eq 'tex') {
1581: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1582: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1583: #FIXME need to support types i and I
1584: if ($type=~/disc/) {
1585: $currentstring .= ' \item[$\bullet$] ';
1586: } elsif ($type=~/circle/) {
1587: $currentstring .= ' \item[$\circ$] ';
1588: } elsif ($type=~/square/) {
1589: $currentstring .= ' \item[$\diamond$] ';
1590: } elsif ($type eq '1') {
1591: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1592: } elsif ($type eq 'A') {
1593: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1594: } elsif ($type eq 'a') {
1595: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1596: } elsif ($value ne '') {
1597: $currentstring .= ' \item['.$value.'] ';
1598: } else {
1599: $currentstring .= ' \item ';
1600: }
1601: $Apache::londefdef::list_index++;
1602: }
1603: return $currentstring;
1604: }
1605:
1606: sub end_li {
1607: my ($target,$token) = @_;
1608: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1609: if ($target eq 'web') {
1610: $currentstring .= $token->[2];
1611: }
1612: return $currentstring;
1613: }
1614:
1615: #-- <u> tag (end tag required)
1616: sub start_u {
1617: my ($target,$token) = @_;
1618: my $currentstring = '';
1619: if ($target eq 'web') {
1620: $currentstring .= $token->[4];
1621: } elsif ($target eq 'tex') {
1622: &Apache::lonxml::startredirection();
1623: }
1624: return $currentstring;
1625: }
1626:
1627: sub end_u {
1628: my ($target,$token) = @_;
1629: my $currentstring = '';
1630: if ($target eq 'web') {
1631: $currentstring .= $token->[2];
1632: } elsif ($target eq 'tex') {
1633: $currentstring=&Apache::lonxml::endredirection();
1634: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1635: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1636: $currentstring=~s/(\S)\s*$/$1\}/;
1637: }
1638: return $currentstring;
1639: }
1640:
1641: #-- <ul> tag (end tag required)
1642: sub start_ul {
1643: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1644: my $currentstring = &end_p(); # Close off enclosing list.
1645: if ($target eq 'web') {
1646: $currentstring .= $token->[4];
1647: } elsif ($target eq 'tex') {
1648: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1649: $Apache::londefdef::list_index=0;
1650: if ($TeXtype eq 'disc') {
1651: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1652: '\renewcommand{\labelitemii}{$\bullet$}'.
1653: '\renewcommand{\labelitemiii}{$\bullet$}'.
1654: '\renewcommand{\labelitemiv}{$\bullet$}';
1655: } elsif ($TeXtype eq 'circle') {
1656: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1657: '\renewcommand{\labelitemii}{$\circ$}'.
1658: '\renewcommand{\labelitemiii}{$\circ$}'.
1659: '\renewcommand{\labelitemiv}{$\circ$}';
1660: } elsif ($TeXtype eq 'square') {
1661: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1662: '\renewcommand{\labelitemii}{$\diamond$}'.
1663: '\renewcommand{\labelitemiii}{$\diamond$}'.
1664: '\renewcommand{\labelitemiv}{$\diamond$}';
1665: }
1666: $currentstring .= '\strut \begin{itemize}';
1667: }
1668: return $currentstring;
1669: }
1670:
1671: sub end_ul {
1672: my ($target,$token) = @_;
1673: my $currentstring = '';
1674: if ($target eq 'web') {
1675: $currentstring = $token->[2];
1676: } elsif ($target eq 'tex') {
1677: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1678: '\renewcommand{\labelitemii}{$\bullet$}'.
1679: '\renewcommand{\labelitemiii}{$\bullet$}'.
1680: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1681: }
1682: return $currentstring;
1683: }
1684:
1685: #-- <menu> tag (end tag required)
1686: sub start_menu {
1687: my ($target,$token) = @_;
1688: my $currentstring = '';
1689: if ($target eq 'web') {
1690: $currentstring = $token->[4];
1691: } elsif ($target eq 'tex') {
1692: $currentstring = " \\begin{itemize} ";
1693: }
1694: return $currentstring;
1695: }
1696:
1697: sub end_menu {
1698: my ($target,$token) = @_;
1699: my $currentstring = '';
1700: if ($target eq 'web') {
1701: $currentstring = $token->[2];
1702: } elsif ($target eq 'tex') {
1703: $currentstring = " \\end{itemize}";
1704: }
1705: return $currentstring;
1706: }
1707:
1708: #-- <dir> tag (end tag required)
1709: sub start_dir {
1710: my ($target,$token) = @_;
1711: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1712: if ($target eq 'web') {
1713: $currentstring .= $token->[4];
1714: } elsif ($target eq 'tex') {
1715: $currentstring .= " \\begin{itemize} ";
1716: }
1717: return $currentstring;
1718: }
1719:
1720: sub end_dir {
1721: my ($target,$token) = @_;
1722: my $currentstring = '';
1723: if ($target eq 'web') {
1724: $currentstring = $token->[2];
1725: } elsif ($target eq 'tex') {
1726: $currentstring = " \\end{itemize}";
1727: }
1728: return $currentstring;
1729: }
1730:
1731: #-- <ol> tag (end tag required)
1732: sub start_ol {
1733: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1734: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1735: if ($target eq 'web') {
1736: $currentstring .= $token->[4];
1737: } elsif ($target eq 'tex') {
1738: $Apache::londefdef::list_index=0;
1739: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1740: if ($type eq '1') {
1741: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1742: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1743: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1744: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1745: } elsif ($type eq 'A') {
1746: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1747: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1748: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1749: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1750: } elsif ($type eq 'a') {
1751: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1752: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1753: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1754: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1755: } elsif ($type eq 'i') {
1756: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1757: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1758: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1759: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1760: } elsif ($type eq 'I') {
1761: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1762: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1763: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1764: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1765: }
1766: $currentstring .= '\strut \begin{enumerate}';
1767: }
1768: return $currentstring;
1769: }
1770:
1771: sub end_ol {
1772: my ($target,$token) = @_;
1773: my $currentstring = '';
1774: if ($target eq 'web') {
1775: $currentstring = $token->[2];
1776: } elsif ($target eq 'tex') {
1777: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1778: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1779: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1780: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1781: }
1782: return $currentstring;
1783: }
1784:
1785: #-- <dl> tag (end tag required)
1786: sub start_dl {
1787: my ($target,$token) = @_;
1788: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1789: if ($target eq 'web') {
1790: $currentstring .= $token->[4];
1791: } elsif ($target eq 'tex') {
1792: $currentstring .= '\begin{description}';
1793: $Apache::londefdef::DL++;
1794: push(@Apache::londefdef::description,[]);
1795: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1796: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1797: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1798: }
1799: return $currentstring;
1800: }
1801:
1802: sub end_dl {
1803: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1804: my $currentstring = '';
1805: if ($target eq 'web') {
1806: $currentstring = $token->[2];
1807: } elsif ($target eq 'tex') {
1808: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1809: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1810: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1811: $currentstring.=' '.$element.' ';
1812: }
1813: pop(@Apache::londefdef::description);
1814: $currentstring.='\end{description}';
1815: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1816: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1817: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1818: $Apache::londefdef::DL--;
1819: }
1820: return $currentstring;
1821: }
1822:
1823: #-- <dt> tag (end tag optional)
1824: sub start_dt {
1825: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1826: my $currentstring='';
1827: if ($target eq 'web') {
1828: $currentstring = $token->[4];
1829: } elsif ($target eq 'tex') {
1830: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1831: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1832: &Apache::lonxml::startredirection();
1833: $Apache::londefdef::DT[-1]++;
1834: $Apache::londefdef::seenDT[-1]=1;
1835: }
1836: return $currentstring;
1837: }
1838:
1839: sub end_dt {
1840: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1841: my $currentstring = '';
1842: if ($target eq 'web') {
1843: $currentstring = $token->[2];
1844: } elsif ($target eq 'tex') {
1845: if ($Apache::londefdef::DT[-1]) {
1846: my $data=&item_cleanup();
1847: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1848: $Apache::londefdef::DT[-1]--;
1849: }
1850: }
1851: return $currentstring;
1852: }
1853:
1854: sub item_cleanup {
1855: my $item=&Apache::lonxml::endredirection();
1856: $item=~s/\\begin{center}//g;
1857: $item=~s/\\end{center}//g;
1858: return $item;
1859: }
1860:
1861: #-- <dd> tag (end tag optional)
1862: sub start_dd {
1863: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1864: my $currentstring = '';
1865: if ($target eq 'web') {
1866: $currentstring = $token->[4];
1867: } elsif ($target eq 'tex') {
1868: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1869: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1870: if (!$Apache::londefdef::seenDT[-1]) {
1871: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1872: }
1873: push(@{$Apache::londefdef::description[-1]},'');
1874: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1875: $Apache::londefdef::DD[-1]++;
1876: &Apache::lonxml::startredirection();
1877: }
1878: return $currentstring;
1879: }
1880:
1881: sub end_dd {
1882: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1883: my $currentstring = '';
1884: if ($target eq 'web') {
1885: $currentstring = $token->[2];
1886: } elsif ($target eq 'tex') {
1887: $Apache::londefdef::description[-1]->[-1].=
1888: &Apache::lonxml::endredirection().' \vskip 0mm ';
1889: $Apache::londefdef::DD[-1]--;
1890: }
1891: return $currentstring;
1892: }
1893:
1894: #-- <table> tag (end tag required)
1895: # <table> also ends any prior <p> that is not closed.
1896: # but, unless I allow <p>'s to nest, that's the
1897: # only way I could think of to allow <p> in
1898: # <tr> <th> bodies
1899: #
1900: #list of supported attributes: border,width,TeXwidth
1901: sub start_table {
1902: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1903: my $textwidth = '';
1904: my $currentstring = &end_p();
1905: if ($target eq 'web') {
1906: $currentstring .= $token->[4];
1907: } elsif ($target eq 'tex') {
1908: my $aa = {};
1909: push @Apache::londefdef::table, $aa;
1910: $Apache::londefdef::table[-1]{'row_number'} = -1;
1911: #maximum table's width (default coincides with text line length)
1912: if ($#Apache::londefdef::table==0) {
1913: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1914: $textwidth=~/(\d+\.?\d*)/;
1915: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1916: } else {
1917: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1918: #the maximum width of nested table is determined by LATeX width of parent cell
1919: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1920: } else {
1921: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1922: $textwidth=$Apache::londefdef::table[-2]{'width'};
1923: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1924: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1925: }
1926: }
1927: }
1928: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1929: if (not defined $TeXwidth) {
1930: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);
1931: if ($htmlwidth=~/%/) {
1932: $Apache::londefdef::table[-1]{'percent'}=1;
1933: $htmlwidth=~/(\d+)/;
1934: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;;
1935: } else {
1936: $Apache::londefdef::table[-1]{'width'}=$textwidth;
1937: }
1938: } elsif ($TeXwidth=~/%/) {
1939: $Apache::londefdef::table[-1]{'percent'}=1;
1940: $TeXwidth=~/(\d+)/;
1941: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1942: } else {
1943: $Apache::londefdef::table[-1]{'forcetablewidth'}=1;
1944: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1945: }
1946: #table's border
1947: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1948: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1949: unless (defined $border) { $border = 0; }
1950: if ($border) {
1951: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1952: $Apache::londefdef::table[-1]{'vinc'} = '&';
1953: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1954: } else {
1955: $Apache::londefdef::table[-1]{'hinc'} = '';
1956: $Apache::londefdef::table[-1]{'vinc'} = '&';
1957: $Apache::londefdef::table[-1]{'vvinc'} = '';
1958: }
1959: if ($#Apache::londefdef::table==0) {
1960: # Note that \newline seems to destroy the alignment envs.
1961: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1962: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1963: }
1964: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1965: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1966: $Apache::londefdef::table[-1]{'objectlen'}=[];
1967: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1968: $Apache::londefdef::table[-1]{'maxlen'}=[];
1969: $Apache::londefdef::table[-1]{'minlen'}=[];
1970: $Apache::londefdef::table[-1]{'content'}=[];
1971: $Apache::londefdef::table[-1]{'align'}=[];
1972: $currentstring.='\keephidden{NEW TABLE ENTRY}';
1973: }
1974: return $currentstring;
1975: }
1976:
1977: sub end_table {
1978: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1979: my $currentstring = '';
1980: if ($target eq 'web') {
1981: $currentstring = $token->[2];
1982: } elsif ($target eq 'tex') {
1983: my $inmemory = '';
1984: my $output = '';
1985: my $WARNING='';
1986: #width of columns from TeXwidth attributes
1987: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
1988: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
1989: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
1990: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
1991: }
1992: }
1993: }
1994: #free space and number of empty columns
1995: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
1996: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
1997: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
1998: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
1999: $empty_columns++;
2000: } else {
2001: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2002: }
2003: }
2004: #boundaries for contents columns
2005: my @min_len=();#columns can not be narrower
2006: my @max_len=();#maximum length of column
2007: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2008: my ($localmin,$localmax)=(0,0);
2009: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2010: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2011: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2012: }
2013: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2014: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2015: }
2016: }
2017: push @min_len, $localmin;
2018: push @max_len, $localmax;
2019: }
2020: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2021: my $localmin=0,;
2022: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2023: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2024: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2025: }
2026: }
2027: if ($max_len[$jn]<$localmin) {
2028: $max_len[$jn]=$localmin;
2029: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2030: }#object size is bigger
2031: if ($min_len[$jn]<$localmin) {
2032: $min_len[$jn]=$localmin;
2033: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2034: }#object size is bigger
2035: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2036: $min_len[$jn]=0;
2037: $max_len[$jn]=0;
2038: }
2039: }
2040: #final adjustment of column width
2041: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2042: my @adjust=();
2043: #step 1. adjustment by maximum value
2044: my $space_neeeded=0;
2045: for (my $jn=0;$jn<=$#max_len;$jn++) {
2046: $space_neeeded=$space_neeeded+$max_len[$jn];
2047: }
2048: if ($space_neeeded<=$available_space) {
2049: for (my $jn=0;$jn<=$#max_len;$jn++) {
2050: if ($fwidth[$jn]==0) {
2051: $fwidth[$jn]=$max_len[$jn];
2052: }
2053: }
2054: } else {
2055: #step 2. adjustment by minimum value (estimation)
2056: $space_neeeded=0;
2057: for (my $jn=0;$jn<=$#min_len;$jn++) {
2058: $space_neeeded+=$min_len[$jn];
2059: }
2060: if ($space_neeeded>$available_space) {
2061: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2062: for (my $jn=0;$jn<=$#max_len;$jn++) {
2063: if ($fwidth[$jn]==0) {
2064: $fwidth[$jn]=$min_len[$jn];
2065: }
2066: }
2067: #check if we have objects which can be scaled
2068: my $how_many_to_scale=0;
2069: my @to_scale=();
2070: for (my $jn=0;$jn<=$#max_len;$jn++) {
2071: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2072: $how_many_to_scale++;
2073: push @to_scale, $jn;
2074: }
2075: }
2076: if ($how_many_to_scale>0) {
2077: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2078: foreach my $jn (@to_scale) {
2079: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2080: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2081: if ($1 ne '') {
2082: my $current_length=&recalc($1);
2083: $current_length=~/(\d+\.?\d*)/;
2084: $current_length=$current_length-$space_to_adjust;
2085: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2086: }
2087: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2088: if ($1 ne '') {
2089: my $current_length=$1;
2090: $current_length=$current_length-$space_to_adjust;
2091: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2092: }
2093: }
2094: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2095: }
2096: }
2097: } else {
2098: #step 3. adjustment over minimal + corrections
2099: my $enlarge_coef=$available_space/$space_neeeded;
2100: my $acsessive=0;
2101: for (my $jn=0;$jn<=$#min_len;$jn++) {
2102: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2103: if ($adjust[$jn]>$max_len[$jn]) {
2104: $fwidth[$jn]=$max_len[$jn];
2105: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2106: $adjust[$jn]=0;
2107: }
2108: }
2109: if ($acsessive>0) {
2110: #we have an excess of space and can redistribute it
2111: my $notempty_columns=0;
2112: for (my $jn=0;$jn<=$#min_len;$jn++) {
2113: if ($adjust[$jn]!=0) {
2114: $notempty_columns++;
2115: }
2116: }
2117: my $per_column=$acsessive/$notempty_columns;
2118: for (my $jn=0;$jn<=$#min_len;$jn++) {
2119: if ($adjust[$jn]!=0) {
2120: $adjust[$jn]+=$per_column;
2121: $fwidth[$jn]=$adjust[$jn];
2122: }
2123: }
2124: } else {
2125: for (my $jn=0;$jn<=$#min_len;$jn++) {
2126: $fwidth[$jn]=$adjust[$jn];
2127: }
2128: }
2129: }
2130: }
2131: #use all available width if it is defined in % or as TeXwidth
2132: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2133: my $current=0;
2134: for (my $i=0;$i<=$#fwidth;$i++) {
2135: $current+=$fwidth[$i];
2136: }
2137: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2138: for (my $i=0;$i<=$#fwidth;$i++) {
2139: $fwidth[$i]*=$coef;
2140: }
2141: }
2142: #removing of empty columns if allowed
2143: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2144: if ($permission eq 'yes') {
2145: my @cleaned_table=();
2146: my @cleaned_header=();
2147: my $colind=0;
2148: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2149: if ($fwidth[$jn]!=0) {
2150: #we need to copy column
2151: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2152: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2153: $cleaned_header[$colind]=$fwidth[$jn];
2154: }
2155: $colind++;
2156: }
2157: }
2158: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2159: @fwidth=@cleaned_header;
2160: }
2161: #construct header of the table
2162: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2163: for (my $in=0;$in<=$#fwidth;$in++) {
2164: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2165: }
2166: $header_of_table .= '}';
2167: #fill the table
2168: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2169: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2170: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2171: $output.='\vspace*{-6 mm}\begin{center}';
2172: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2173: $output.=' \hfill \llap{'
2174: }
2175: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2176: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2177: $output.='\end{center}\vspace*{-6 mm}';
2178: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2179: $output.='} ';
2180: }
2181: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2182: }
2183: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2184: }
2185: # Note that \newline destroys alignment env's produced by e.g. <div>
2186: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2187: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2188: if ($#Apache::londefdef::table > 0) {
2189: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2190: pop @Apache::londefdef::table;
2191: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2192: } else {
2193: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2194: pop @Apache::londefdef::table;
2195: undef @Apache::londefdef::table;
2196: }
2197: }
2198: return $currentstring;
2199: }
2200:
2201: #-- <tr> tag (end tag optional)
2202: sub start_tr {
2203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2204: my $currentstring = '';
2205: if ($target eq 'web') {
2206: $currentstring = $token->[4];
2207: } elsif ($target eq 'tex') {
2208: $Apache::londefdef::table[-1]{'row_number'}++;
2209: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2210: if ($alignchar ne '') {
2211: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2212: } else {
2213: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2214: }
2215: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2216: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2217: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2218: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2219: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2220: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2221: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2222: }
2223: return $currentstring;
2224: }
2225:
2226: sub end_tr {
2227: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2228: my $currentstring = &end_p(); # Close any pending <p> in the row.
2229: if ($target eq 'web') {
2230: $currentstring .= $token->[2];
2231: } elsif ($target eq 'tex') {
2232: if ($Apache::londefdef::TD_redirection) {
2233: &end_td_tex($parstack,$parser,$safeeval);
2234: }
2235: }
2236: return $currentstring;
2237: }
2238:
2239: #-- <td> tag (end tag optional)
2240: sub start_td {
2241: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2242: my $currentstring = '';
2243: if ($target eq 'web') {
2244: $currentstring = $token->[4];
2245: } elsif ($target eq 'tex') {
2246: $Apache::londefdef::TD_redirection = 1;
2247: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2248: }
2249: return $currentstring;
2250: }
2251:
2252: sub tag_check {
2253: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2254: my @ar=@$parstack;
2255: for (my $i=$#ar-1;$i>=0;$i--) {
2256: if (lc($$tagstack[$i]) eq $good_tag) {
2257: &start_td_tex($parstack,$parser,$safeeval);
2258: last;
2259: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2260: splice @ar, $i+1;
2261: &end_td_tex(\@ar,$parser,$safeeval);
2262: &start_td_tex($parstack,$parser,$safeeval);
2263: last;
2264: }
2265: }
2266: return '';
2267: }
2268:
2269: sub start_td_tex {
2270: my ($parstack,$parser,$safeeval) = @_;
2271: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2272: if ($alignchar eq '') {
2273: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2274: }
2275: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2276: $Apache::londefdef::table[-1]{'counter_columns'}++;
2277: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2278: if (defined $TeXwidth) {
2279: my $current_length=&recalc($TeXwidth);
2280: $current_length=~/(\d+\.?\d*)/;
2281: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2282: }
2283: &Apache::lonxml::startredirection();
2284: return '';
2285: }
2286:
2287: sub end_td_tex {
2288: my ($parstack,$parser,$safeeval) = @_;
2289: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2290: my $data=&Apache::lonxml::endredirection();
2291: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2292: if (defined $TeXwidth) {
2293: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2294: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2295: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2296: } else {
2297: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2298: my $garbage_data=$data;
2299: my $fwidth=0;
2300: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2301: my $current_length=&recalc($1);
2302: $current_length=~/(\d+\.?\d*)/;
2303: if ($fwidth<$1) {$fwidth=$1;}
2304: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2305: }
2306: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2307: my $current_length=$1;
2308: if ($fwidth<$current_length) {$fwidth=$current_length;}
2309: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2310: }
2311: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2312: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2313: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2314: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2315: } elsif ($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)*/) {
2316: my $garbage_data=$data;
2317: my $fwidth=0;
2318: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2319: my $current_length=&recalc($1);
2320: $current_length=~/(\d+\.?\d*)/;
2321: if ($fwidth<$1) {$fwidth=$1;}
2322: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2323: }
2324: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2325: my $current_length=&recalc($1);
2326: $current_length=~/(\d+\.?\d*)/;
2327: if ($fwidth<$1) {$fwidth=$1;}
2328: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2329: }
2330: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2331: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2332: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2333: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2334: $data=~s/\\\\\s*$//;
2335: } else {
2336: $data=~s/^\s+(\S.*)/$1/;
2337: $data=~s/(.*\S)\s+$/$1/;
2338: $data=~s/(\s)+/$1/;
2339: my ($current_length,$min_length)=(0,0);
2340: if ($data=~/\\vskip/) {
2341: my $newdata=$data;
2342: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2343: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2344: foreach my $elementdata (@newdata) {
2345: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2346: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2347: my @words=split(/ /,$elementdata);
2348: foreach my $word (@words) {
2349: my $lengthword=2.5*&LATEX_length($word);
2350: if ($min_length<$lengthword) {$min_length=$lengthword;}
2351: }
2352: }
2353: } else {
2354: $current_length=2.5*&LATEX_length($data);
2355: my @words=split(/ /,$data);
2356: foreach my $word (@words) {
2357: my $lengthword=2*&LATEX_length($word);
2358: if ($min_length<$lengthword) {$min_length=$lengthword;}
2359: }
2360: }
2361: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2362: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2363: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2364: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2365: }
2366: }
2367: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2368: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2369: }
2370: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2371: return'';
2372: }
2373:
2374: sub end_td {
2375: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2376: my $currentstring = '';
2377: if ($target eq 'web') {
2378: $currentstring = $token->[2];
2379: } elsif ($target eq 'tex') {
2380: $Apache::londefdef::TD_redirection =0;
2381: &end_td_tex($parstack,$parser,$safeeval);
2382: }
2383: return $currentstring;
2384: }
2385:
2386: #-- <th> tag (end tag optional)
2387: sub start_th {
2388: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2389: my $currentstring = '';
2390: if ($target eq 'web') {
2391: $currentstring = $token->[4];
2392: } elsif ($target eq 'tex') {
2393: $Apache::londefdef::TD_redirection = 1;
2394: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2395: }
2396: return $currentstring;
2397: }
2398:
2399: sub tagg_check {
2400: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2401: my @ar=@$parstack;
2402: for (my $i=$#ar-1;$i>=0;$i--) {
2403: if (lc($$tagstack[$i]) eq $good_tag) {
2404: &start_th_tex($parstack,$parser,$safeeval);
2405: last;
2406: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2407: splice @ar, $i+1;
2408: &end_th_tex(\@ar,$parser,$safeeval);
2409: &start_th_tex($parstack,$parser,$safeeval);
2410: last;
2411: }
2412: }
2413: return '';
2414: }
2415:
2416: sub start_th_tex {
2417: my ($parstack,$parser,$safeeval) = @_;
2418: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2419: if ($alignchar eq '') {
2420: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2421: }
2422: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2423: $Apache::londefdef::table[-1]{'counter_columns'}++;
2424: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2425: if (defined $TeXwidth) {
2426: my $current_length=&recalc($TeXwidth);
2427: $current_length=~/(\d+\.?\d*)/;
2428: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2429: }
2430: &Apache::lonxml::startredirection();
2431: return '';
2432: }
2433:
2434: sub end_th_tex {
2435: my ($parstack,$parser,$safeeval) = @_;
2436: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2437: my $data=&Apache::lonxml::endredirection();
2438: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2439: if (defined $TeXwidth) {
2440: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2441: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2442: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2443: } else {
2444: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2445: my $garbage_data=$data;
2446: my $fwidth=0;
2447: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2448: my $current_length=&recalc($1);
2449: $current_length=~/(\d+\.?\d*)/;
2450: if ($fwidth<$1) {$fwidth=$1;}
2451: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2452: }
2453: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2454: my $current_length=$1;
2455: if ($fwidth<$current_length) {$fwidth=$current_length;}
2456: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2457: }
2458: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2459: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2460: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2461: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2462: } else {
2463: $data=~s/^\s+(\S.*)/$1/;
2464: $data=~s/(.*\S)\s+$/$1/;
2465: $data=~s/(\s)+/$1/;
2466: my ($current_length,$min_length)=(0,0);
2467: if ($data=~/\\vskip/) {
2468: my $newdata=$data;
2469: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2470: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2471: foreach my $elementdata (@newdata) {
2472: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2473: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2474: my @words=split(/ /,$elementdata);
2475: foreach my $word (@words) {
2476: my $lengthword=2.5*&LATEX_length($word);
2477: if ($min_length<$lengthword) {$min_length=$lengthword;}
2478: }
2479: }
2480: } else {
2481: $current_length=2.5*&LATEX_length($data);
2482: my @words=split(/ /,$data);
2483: foreach my $word (@words) {
2484: my $lengthword=2*&LATEX_length($word);
2485: if ($min_length<$lengthword) {$min_length=$lengthword;}
2486: }
2487: }
2488: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2489: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2490: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2491: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2492: }
2493: }
2494: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2495: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2496: }
2497: #make data bold
2498: $data='\textbf{'.$data.'}';
2499: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2500: return'';
2501: }
2502:
2503: sub end_th {
2504: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2505: my $currentstring = &end_p(); # Close any open <p> in the row.
2506: if ($target eq 'web') {
2507: $currentstring .= $token->[2];
2508: } elsif ($target eq 'tex') {
2509: $Apache::londefdef::TD_redirection =0;
2510: &end_th_tex($parstack,$parser,$safeeval);
2511: }
2512: return $currentstring;
2513: }
2514:
2515: #-- <img> tag (end tag forbidden)
2516: #
2517: # Render the <IMG> tag.
2518: # <IMG> has the following attributes (in addition to the
2519: # standard HTML ones:
2520: # TeXwrap - Governs how the tex target will try to wrap text around
2521: # horizontally aligned images.
2522: # TeXwidth - The width of the image when rendered for print (mm).
2523: # TeXheight - The height of the image when rendered for print (mm)
2524: # (Note there seems to also be support for this as a % of page size)
2525: #
2526: sub start_img {
2527: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2528: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2529: undef,1);
2530: if (not $src and ($target eq 'web' or $target eq 'tex')) {
2531: my $inside = &Apache::lonxml::get_all_text("/img",$parser);
2532: return '';
2533: }
2534: &Apache::lonxml::extlink($src);
2535: my $currentstring = '';
2536: my $scaling = .3;
2537:
2538: # Render unto browsers that which are the browser's...
2539:
2540: if ($target eq 'web') {
2541: if ($env{'browser.imagesuppress'} ne 'on') {
2542: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2543: } else {
2544: my $alttag= &Apache::lonxml::get_param
2545: ('alt',$parstack,$safeeval,undef,1);
2546: unless ($alttag) {
2547: $alttag=&Apache::lonmeta::alttag
2548: ($Apache::lonxml::pwd[-1],$src);
2549: }
2550: $currentstring.='[IMAGE: '.$alttag.']';
2551: }
2552:
2553: # and render unto TeX that which is LaTeX
2554:
2555: } elsif ($target eq 'tex') {
2556: #
2557: # The alignment will require some superstructure to be put around
2558: # the \includegraphics stuff. At present we can only partially
2559: # simulate the alignments offered by html.
2560: #
2561: #
2562: my $align = lc(&Apache::lonxml::get_param('align',
2563: $parstack,
2564: $safeeval,
2565: undef,1));
2566: if(!$align) {
2567: if (&is_inside_of($tagstack, "table")) {
2568: $align = "right"; # Force wraptext use.
2569: } else {
2570: $align = "bottom"; # This is html's default so it's ours too.
2571: }
2572: }
2573: #
2574: &Apache::lonxml::debug("Alignemnt = $align");
2575: # LaTeX's image/text wrapping is really bad since it wants to
2576: # make figures float.
2577: # The user has the optional parameter (applicable only to l/r
2578: # alignment to use the picins/parpic directive to get wrapped text
2579: # this is also imperfect.. that's why we give them a choice...
2580: # so they can't yell at us for our choice.
2581: #
2582: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2583: $parstack,
2584: $safeeval,
2585: undef,0);
2586: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2587: if(!$latex_rendering) {
2588: $latex_rendering = "texwrap";
2589: }
2590: &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2591:
2592: #if original gif/jpg/png file exist do following:
2593: my $origsrc=$src;
2594: my ($path,$file) = &get_eps_image($src);
2595: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2596: &Apache::lonxml::debug("path = $path file = $file src = $src");
2597: if (-e $src) {
2598: &Apache::lonxml::debug("$src exists");
2599: my ($height_param,$width_param)=
2600: &image_size($origsrc,0.3,$parstack,$safeeval);
2601: my $destpath = $path;
2602: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2603: my $destfile = $file;
2604: $destfile =~ s/ /\_/g;
2605: my $size;
2606: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2607: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2608: $size='['.$size;
2609: $size=~s/,$/]/;
2610: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2611: .'\includegraphics'.$size.'{'.$destfile.'} ';
2612:
2613: # If there's an alignment specification we need to honor it here.
2614: # For the horizontal alignments, we will also honor the
2615: # value of the latex specfication. The default is parbox,
2616: # and that's used for illegal values too.
2617: #
2618: # Even though we set a default alignment value, the user
2619: # could have given us an illegal value. In that case we
2620: # just use the default alignment of bottom..
2621: if ($align eq "top") {
2622: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2623: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2624: my $offset = $height_param/2;
2625: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2626: } elsif ($align eq "left") {
2627: if ($latex_rendering eq "parpic") {
2628: $currentstring = '\parpic[l]{'.$currentstring.'}';
2629: } else { # wrapfig render
2630: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2631: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2632: }
2633: } elsif ($align eq "right") {
2634: if ($latex_rendering eq "parpic") {
2635: $currentstring = '\parpic[r]{'.$currentstring.'}';
2636: } else { # wrapfig rendering
2637: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2638: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2639:
2640: }
2641: } else { # Bottom is also default.
2642: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2643: }
2644: } else {
2645: &Apache::lonxml::debug("$src does not exist");
2646: #original image file doesn't exist so check the alt attribute
2647: my $alt =
2648: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2649: unless ($alt) {
2650: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2651: }
2652:
2653: if ($alt) { $currentstring .= ' '.$alt.' '; }
2654: }
2655:
2656: # And here's where the semi-quote breaks down: allow the user
2657: # to edit the beast as well by rendering the problem for edit:
2658: } elsif ($target eq 'edit') {
2659: $currentstring .=&Apache::edit::tag_start($target,$token);
2660: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2661: &Apache::edit::browse('src',undef,'alt').' '.
2662: &Apache::edit::search('src',undef,'alt').'<br />';
2663: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2664: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2665: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2666: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2667: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2668: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2669: ['','bottom','middle','top','left','right'],$token,5);
2670: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2671: ['', 'parbox', 'parpic'], $token, 2);
2672: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2673: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2674: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2675: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2676: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2677:
2678:
2679: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2680: if ($width) { $currentstring.=' width="'.$width.'" '; }
2681: if ($height) { $currentstring.=' height="'.$height.'" '; }
2682: $currentstring .= ' />';
2683: } elsif ($target eq 'modified') {
2684: my ($osrc,$owidth,$oheight)=
2685: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2686: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2687: $safeeval,'src','alt','align',
2688: 'TeXwidth','TeXheight', 'TeXwrap',
2689: 'width','height');
2690: my ($nsrc,$nwidth,$nheight)=
2691: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2692: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2693: &image_replication($loc);
2694: my ($iwidth,$iheight);
2695: if (-e $loc) {
2696: my $image = Image::Magick->new;
2697: $image->Read($loc);
2698: ($iwidth, $iheight) = ($image->Get('width'),
2699: $image->Get('height'));
2700: }
2701: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2702: # changed image or no size specified,
2703: # if they didn't explicitly change the
2704: # width or height use the ones from the image
2705: if ($iwidth && $iheight) {
2706: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2707: $token->[2]{'width'} = $iwidth;$ctag=1;
2708: }
2709: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2710: $token->[2]{'height'}=$iheight;$ctag=1;
2711: }
2712: }
2713: }
2714: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2715: # if we don't have a width or height
2716: if ($iwidth && $cwidth && !$cheight) {
2717: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2718: }
2719: if ($iheight && $cheight && !$cwidth) {
2720: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2721: }
2722: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2723: }
2724:
2725: return $currentstring;
2726: }
2727:
2728: sub end_img {
2729: my ($target,$token) = @_;
2730: my $currentstring = '';
2731: if ($target eq 'web') {
2732: $currentstring = $token->[2];
2733: } elsif ($target eq 'tex') {
2734: $currentstring = '';
2735: }
2736: return $currentstring;
2737: }
2738:
2739: #-- <applet> tag (end tag required)
2740: sub start_applet {
2741: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2742:
2743: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2744: &Apache::lonxml::extlink($code);
2745: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2746: undef,1);
2747: &Apache::lonxml::extlink($archive);
2748: my $currentstring = '';
2749: if ($target eq 'web') {
2750: if ($env{'browser.appletsuppress'} ne 'on') {
2751: $currentstring = &Apache::lonenc::encrypt_ref($token,
2752: {'code'=>$code,
2753: 'archive'=>$archive}
2754: );
2755: } else {
2756: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2757: $safeeval,undef,1);
2758: unless ($alttag) {
2759: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2760: $code);
2761: }
2762: $currentstring='[APPLET: '.$alttag.']';
2763: }
2764: } elsif ($target eq 'tex') {
2765: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2766: $safeeval,undef,1);
2767: unless ($alttag) {
2768: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
2769: undef,1);
2770: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2771: $code);
2772: }
2773: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
2774: '.}\end{center}';
2775: }
2776: return $currentstring;
2777: }
2778:
2779: sub end_applet {
2780: my ($target,$token) = @_;
2781: my $currentstring = '';
2782: if ($target eq 'web') {
2783: $currentstring = $token->[2];
2784: } elsif ($target eq 'tex') {
2785: }
2786: return $currentstring;
2787: }
2788:
2789: #-- <embed> tag (end tag optional/required)
2790: sub start_embed {
2791: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2792: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2793: &Apache::lonxml::extlink($src);
2794: my $currentstring = '';
2795: if ($target eq 'web') {
2796: if ($env{'browser.embedsuppress'} ne 'on') {
2797: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
2798: } else {
2799: my $alttag=&Apache::lonxml::get_param
2800: ('alt',$parstack,$safeeval,undef,1);
2801: unless ($alttag) {
2802: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2803: }
2804: $currentstring='[EMBED: '.$alttag.']';
2805: }
2806: } elsif ($target eq 'tex') {
2807: }
2808: return $currentstring;
2809: }
2810:
2811: sub end_embed {
2812: my ($target,$token) = @_;
2813: my $currentstring = '';
2814: if ($target eq 'web') {
2815: $currentstring = $token->[2];
2816: } elsif ($target eq 'tex') {
2817: }
2818: return $currentstring;
2819: }
2820:
2821: #-- <param> tag (end tag forbidden)
2822: sub start_param {
2823: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2824: if (&Apache::lonxml::get_param('name',$parstack,
2825: $safeeval,undef,1)=~/^cabbase$/i) {
2826: my $value=&Apache::lonxml::get_param('value',$parstack,
2827: $safeeval,undef,1);
2828: &Apache::lonxml::extlink($value);
2829: }
2830:
2831: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2832: &Apache::lonxml::extlink($src);
2833: my $currentstring = '';
2834: if ($target eq 'web') {
2835: my %toconvert;
2836: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2837: if ($src) { $toconvert{'src'}= $src; }
2838: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
2839: undef,1);
2840: if ($name=~/^cabbase$/i) {
2841: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
2842: $safeeval,undef,1);
2843: }
2844: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
2845: } elsif ($target eq 'tex') {
2846: }
2847: return $currentstring;
2848: }
2849:
2850: sub end_param {
2851: my ($target,$token) = @_;
2852: my $currentstring = '';
2853: if ($target eq 'web') {
2854: $currentstring = $token->[2];
2855: } elsif ($target eq 'tex') {
2856: }
2857: return $currentstring;
2858: }
2859:
2860: #-- <allow> tag
2861: sub start_allow {
2862: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2863: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
2864: &Apache::lonxml::extlink($src);
2865:
2866: if ($target eq 'tex') { &image_replication($src); }
2867: my $result;
2868: if ($target eq 'edit') {
2869: $result .=&Apache::edit::tag_start($target,$token);
2870: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
2871: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
2872: } elsif ($target eq 'modified') {
2873: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
2874: $safeeval,'src');
2875: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
2876: }
2877: return $result;
2878: }
2879:
2880: sub end_allow {
2881: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2882: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
2883: return '';
2884: }
2885:
2886: #-- Frames (end tag required)
2887: #-- <frameset>
2888: sub start_frameset {
2889: my ($target,$token) = @_;
2890: my $currentstring = ''; # Close any pending para.
2891: if ($target eq 'web') {
2892: if (!$Apache::lonxml::registered &&
2893: $env{'request.state'} eq 'published') {
2894: $currentstring.='<head>'.
2895: &Apache::lonmenu::registerurl(undef,$target).'</head>';
2896: }
2897: my $onLoad='';
2898: foreach my $key (keys(%{$token->[2]})) {
2899: if ($key =~ /^onload$/i) {
2900: $onLoad.=$token->[2]->{$key}.';';
2901: delete($token->[2]->{$key});
2902: }
2903: }
2904: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
2905: my $onUnload='';
2906: foreach my $key (keys(%{$token->[2]})) {
2907: if ($key =~ /^onunload$/i) {
2908: $onUnload.=$token->[2]->{$key}.';';
2909: delete($token->[2]->{$key});
2910: }
2911: }
2912: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
2913: ';'.$onUnload;
2914:
2915: $currentstring .= '<'.$token->[1];
2916: foreach (keys %{$token->[2]}) {
2917: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
2918: }
2919: $currentstring.='>';
2920: }
2921: return $currentstring;
2922: }
2923:
2924: sub end_frameset {
2925: my ($target,$token) = @_;
2926: my $currentstring = '';
2927: if ($target eq 'web') {
2928: $currentstring = $token->[2];
2929: }
2930: return $currentstring;
2931: }
2932:
2933: #-- <xmp> (end tag required)
2934: sub start_xmp {
2935: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2936: my $currentstring = '';
2937: if ($target eq 'web') {
2938: $currentstring .= $token->[4];
2939: } elsif ($target eq 'tex') {
2940: $currentstring .= '\begin{verbatim}';
2941: }
2942: return $currentstring;
2943: }
2944:
2945: sub end_xmp {
2946: my ($target,$token) = @_;
2947: my $currentstring = '';
2948: if ($target eq 'web') {
2949: $currentstring .= $token->[2];
2950: } elsif ($target eq 'tex') {
2951: $currentstring .= '\end{verbatim}';
2952: }
2953: return $currentstring;
2954: }
2955:
2956: #-- <pre> (end tag required)
2957: sub start_pre {
2958: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2959: my $currentstring = &end_p(); # close off pending <p>
2960: if ($target eq 'web') {
2961: $currentstring .= $token->[4];
2962: } elsif ($target eq 'tex') {
2963: $currentstring .= '\begin{verbatim}';
2964: }
2965: return $currentstring;
2966: }
2967:
2968: sub end_pre {
2969: my ($target,$token) = @_;
2970: my $currentstring = '';
2971: if ($target eq 'web') {
2972: $currentstring .= $token->[2];
2973: } elsif ($target eq 'tex') {
2974: $currentstring .= '\end{verbatim}';
2975: }
2976: return $currentstring;
2977: }
2978:
2979: #-- <insert>
2980: sub start_insert {
2981: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2982: my $currentstring = '';
2983: if ($target eq 'web') {
2984: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
2985: $currentstring .= '<b>'.$display.'</b>';;
2986: }
2987: return $currentstring;
2988: }
2989:
2990: sub end_insert {
2991: my ($target,$token) = @_;
2992: my $currentstring = '';
2993: if ($target eq 'web') {
2994: $currentstring .= '';
2995: }
2996: return $currentstring;
2997: }
2998:
2999: #-- <externallink>
3000: sub start_externallink {
3001: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3002: my $currentstring = '';
3003: if ($target eq 'web') {
3004: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3005: $currentstring .= '<b>'.$display.'</b>';;
3006: }
3007: return $currentstring;
3008: }
3009:
3010: sub end_externallink {
3011: my ($target,$token) = @_;
3012: my $currentstring = '';
3013: if ($target eq 'web') {
3014: $currentstring .= '';
3015: }
3016: return $currentstring;
3017: }
3018:
3019: #-- <blankspace heigth="">
3020: sub start_blankspace {
3021: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3022: my $currentstring = &end_p(); # closes off any unclosed <p>
3023: if ($target eq 'tex') {
3024: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3025: $currentstring .= '\vskip '.$howmuch.' ';
3026: }
3027: return $currentstring;
3028: }
3029:
3030: sub end_blankspace {
3031: my ($target,$token) = @_;
3032: my $currentstring = '';
3033: if ($target eq 'tex') {
3034: $currentstring .= '';
3035: }
3036: return $currentstring;
3037: }
3038:
3039: #-- <abbr> tag (end tag required)
3040: sub start_abbr {
3041: my ($target,$token) = @_;
3042: my $currentstring = '';
3043: if ($target eq 'web') {
3044: $currentstring = $token->[4];
3045: }
3046: return $currentstring;
3047: }
3048:
3049: sub end_abbr {
3050: my ($target,$token) = @_;
3051: my $currentstring = '';
3052: if ($target eq 'web') {
3053: $currentstring = $token->[2];
3054: }
3055: return $currentstring;
3056: }
3057:
3058: #-- <acronym> tag (end tag required)
3059: sub start_acronym {
3060: my ($target,$token) = @_;
3061: my $currentstring = '';
3062: if ($target eq 'web') {
3063: $currentstring = $token->[4];
3064: }
3065: return $currentstring;
3066: }
3067:
3068: sub end_acronym {
3069: my ($target,$token) = @_;
3070: my $currentstring = '';
3071: if ($target eq 'web') {
3072: $currentstring = $token->[2];
3073: }
3074: return $currentstring;
3075: }
3076:
3077: #-- <area> tag (end tag forbidden)
3078: sub start_area {
3079: my ($target,$token) = @_;
3080: my $currentstring = '';
3081: if ($target eq 'web') {
3082: $currentstring = $token->[4];
3083: }
3084: return $currentstring;
3085: }
3086:
3087: sub end_area {
3088: my ($target,$token) = @_;
3089: my $currentstring = '';
3090: if ($target eq 'web') {
3091: $currentstring = $token->[2];
3092: }
3093: return $currentstring;
3094: }
3095:
3096: #-- <base> tag (end tag forbidden)
3097: sub start_base {
3098: my ($target,$token) = @_;
3099: my $currentstring = '';
3100: if ($target eq 'web') {
3101: $currentstring = $token->[4];
3102: }
3103: return $currentstring;
3104: }
3105:
3106: sub end_base {
3107: my ($target,$token) = @_;
3108: my $currentstring = '';
3109: if ($target eq 'web') {
3110: $currentstring = $token->[2];
3111: }
3112: return $currentstring;
3113: }
3114:
3115: #-- <bdo> tag (end tag required)
3116: sub start_bdo {
3117: my ($target,$token) = @_;
3118: my $currentstring = '';
3119: if ($target eq 'web') {
3120: $currentstring = $token->[4];
3121: }
3122: return $currentstring;
3123: }
3124:
3125: sub end_bdo {
3126: my ($target,$token) = @_;
3127: my $currentstring = '';
3128: if ($target eq 'web') {
3129: $currentstring = $token->[2];
3130: }
3131: return $currentstring;
3132: }
3133:
3134: #-- <bgsound> tag (end tag optional)
3135: sub start_bgsound {
3136: my ($target,$token) = @_;
3137: my $currentstring = '';
3138: if ($target eq 'web') {
3139: $currentstring = $token->[4];
3140: }
3141: return $currentstring;
3142: }
3143:
3144: sub end_bgsound {
3145: my ($target,$token) = @_;
3146: my $currentstring = '';
3147: if ($target eq 'web') {
3148: $currentstring = $token->[2];
3149: }
3150: return $currentstring;
3151: }
3152:
3153: #-- <blink> tag (end tag required)
3154: sub start_blink {
3155: my ($target,$token) = @_;
3156: my $currentstring = '';
3157: if ($target eq 'web') {
3158: $currentstring = $token->[4];
3159: }
3160: return $currentstring;
3161: }
3162:
3163: sub end_blink {
3164: my ($target,$token) = @_;
3165: my $currentstring = '';
3166: if ($target eq 'web') {
3167: $currentstring = $token->[2];
3168: }
3169: return $currentstring;
3170: }
3171:
3172: #-- <blockquote> tag (end tag required)
3173: sub start_blockquote {
3174: my ($target,$token) = @_;
3175: my $currentstring = &end_p(); # Close any unclosed <p>
3176: if ($target eq 'web') {
3177: $currentstring .= $token->[4];
3178: }
3179: return $currentstring;
3180: }
3181:
3182: sub end_blockquote {
3183: my ($target,$token) = @_;
3184: my $currentstring = '';
3185: if ($target eq 'web') {
3186: $currentstring = $token->[2];
3187: }
3188: return $currentstring;
3189: }
3190:
3191: #-- <button> tag (end tag required)
3192: sub start_button {
3193: my ($target,$token) = @_;
3194: my $currentstring = '';
3195: if ($target eq 'web') {
3196: $currentstring = $token->[4];
3197: }
3198: return $currentstring;
3199: }
3200:
3201: sub end_button {
3202: my ($target,$token) = @_;
3203: my $currentstring = '';
3204: if ($target eq 'web') {
3205: $currentstring = $token->[2];
3206: }
3207: return $currentstring;
3208: }
3209:
3210: #-- <caption> tag (end tag required)
3211: sub start_caption {
3212: my ($target,$token) = @_;
3213: my $currentstring = '';
3214: if ($target eq 'web') {
3215: $currentstring = $token->[4];
3216: }
3217: return $currentstring;
3218: }
3219:
3220: sub end_caption {
3221: my ($target,$token) = @_;
3222: my $currentstring = '';
3223: if ($target eq 'web') {
3224: $currentstring = $token->[2];
3225: }
3226: return $currentstring;
3227: }
3228:
3229: #-- <col> tag (end tag forbdden)
3230: sub start_col {
3231: my ($target,$token) = @_;
3232: my $currentstring = '';
3233: if ($target eq 'web') {
3234: $currentstring = $token->[4];
3235: }
3236: return $currentstring;
3237: }
3238:
3239: sub end_col {
3240: my ($target,$token) = @_;
3241: my $currentstring = '';
3242: if ($target eq 'web') {
3243: $currentstring = $token->[2];
3244: }
3245: return $currentstring;
3246: }
3247:
3248: #-- <colgroup> tag (end tag optional)
3249: sub start_colgroup {
3250: my ($target,$token) = @_;
3251: my $currentstring = '';
3252: if ($target eq 'web') {
3253: $currentstring = $token->[4];
3254: }
3255: return $currentstring;
3256: }
3257:
3258: sub end_colgroup {
3259: my ($target,$token) = @_;
3260: my $currentstring = '';
3261: if ($target eq 'web') {
3262: $currentstring = $token->[2];
3263: }
3264: return $currentstring;
3265: }
3266:
3267: #-- <del> tag (end tag required)
3268: sub start_del {
3269: my ($target,$token) = @_;
3270: my $currentstring = '';
3271: if ($target eq 'web') {
3272: $currentstring = $token->[4];
3273: }
3274: return $currentstring;
3275: }
3276:
3277: sub end_del {
3278: my ($target,$token) = @_;
3279: my $currentstring = '';
3280: if ($target eq 'web') {
3281: $currentstring = $token->[2];
3282: }
3283: return $currentstring;
3284: }
3285:
3286: #-- <fieldset> tag (end tag required)
3287: sub start_fieldset {
3288: my ($target,$token) = @_;
3289: my $currentstring = '';
3290: if ($target eq 'web') {
3291: $currentstring = $token->[4];
3292: }
3293: return $currentstring;
3294: }
3295:
3296: sub end_fieldset {
3297: my ($target,$token) = @_;
3298: my $currentstring = '';
3299: if ($target eq 'web') {
3300: $currentstring = $token->[2];
3301: }
3302: return $currentstring;
3303: }
3304:
3305: #-- <frame> tag (end tag forbidden)
3306: sub start_frame {
3307: my ($target,$token) = @_;
3308: my $currentstring = '';
3309: if ($target eq 'web') {
3310: $currentstring = $token->[4];
3311: }
3312: return $currentstring;
3313: }
3314:
3315: sub end_frame {
3316: my ($target,$token) = @_;
3317: my $currentstring = '';
3318: if ($target eq 'web') {
3319: $currentstring = $token->[2];
3320: }
3321: return $currentstring;
3322: }
3323:
3324: #-- <iframe> tag (end tag required)
3325: sub start_iframe {
3326: my ($target,$token) = @_;
3327: my $currentstring = '';
3328: if ($target eq 'web') {
3329: $currentstring = $token->[4];
3330: }
3331: return $currentstring;
3332: }
3333:
3334: sub end_iframe {
3335: my ($target,$token) = @_;
3336: my $currentstring = '';
3337: if ($target eq 'web') {
3338: $currentstring = $token->[2];
3339: }
3340: return $currentstring;
3341: }
3342:
3343: #-- <ins> tag (end tag required)
3344: sub start_ins {
3345: my ($target,$token) = @_;
3346: my $currentstring = '';
3347: if ($target eq 'web') {
3348: $currentstring = $token->[4];
3349: }
3350: return $currentstring;
3351: }
3352:
3353: sub end_ins {
3354: my ($target,$token) = @_;
3355: my $currentstring = '';
3356: if ($target eq 'web') {
3357: $currentstring = $token->[2];
3358: }
3359: return $currentstring;
3360: }
3361:
3362: #-- <isindex> tag (end tag forbidden)
3363: sub start_isindex {
3364: my ($target,$token) = @_;
3365: my $currentstring = '';
3366: if ($target eq 'web') {
3367: $currentstring = $token->[4];
3368: }
3369: return $currentstring;
3370: }
3371:
3372: sub end_isindex {
3373: my ($target,$token) = @_;
3374: my $currentstring = '';
3375: if ($target eq 'web') {
3376: $currentstring = $token->[2];
3377: }
3378: return $currentstring;
3379: }
3380:
3381: #-- <keygen> tag (end tag forbidden)
3382: sub start_keygen {
3383: my ($target,$token) = @_;
3384: my $currentstring = '';
3385: if ($target eq 'web') {
3386: $currentstring = $token->[4];
3387: }
3388: return $currentstring;
3389: }
3390:
3391: sub end_keygen {
3392: my ($target,$token) = @_;
3393: my $currentstring = '';
3394: if ($target eq 'web') {
3395: $currentstring = $token->[2];
3396: }
3397: return $currentstring;
3398: }
3399:
3400: #-- <label> tag
3401: sub start_label {
3402: my ($target,$token) = @_;
3403: my $currentstring = '';
3404: if ($target eq 'web') {
3405: $currentstring = $token->[4];
3406: }
3407: return $currentstring;
3408: }
3409:
3410: sub end_label {
3411: my ($target,$token) = @_;
3412: my $currentstring = '';
3413: if ($target eq 'web') {
3414: $currentstring = $token->[2];
3415: }
3416: return $currentstring;
3417: }
3418:
3419: #-- <layer> tag (end tag required)
3420: sub start_layer {
3421: my ($target,$token) = @_;
3422: my $currentstring = '';
3423: if ($target eq 'web') {
3424: $currentstring = $token->[4];
3425: }
3426: return $currentstring;
3427: }
3428:
3429: sub end_layer {
3430: my ($target,$token) = @_;
3431: my $currentstring = '';
3432: if ($target eq 'web') {
3433: $currentstring = $token->[2];
3434: }
3435: return $currentstring;
3436: }
3437:
3438: #-- <legend> tag (end tag required)
3439: sub start_legend {
3440: my ($target,$token) = @_;
3441: my $currentstring = '';
3442: if ($target eq 'web') {
3443: $currentstring = $token->[4];
3444: }
3445: return $currentstring;
3446: }
3447:
3448: sub end_legend {
3449: my ($target,$token) = @_;
3450: my $currentstring = '';
3451: if ($target eq 'web') {
3452: $currentstring = $token->[2];
3453: }
3454: return $currentstring;
3455: }
3456:
3457: #-- <link> tag (end tag forbidden)
3458: sub start_link {
3459: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3460: my $currentstring = '';
3461: if ($target eq 'web') {
3462: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3463: undef,1);
3464: &Apache::lonxml::extlink($href);
3465: $currentstring = $token->[4];
3466: }
3467: return $currentstring;
3468: }
3469:
3470: sub end_link {
3471: my ($target,$token) = @_;
3472: my $currentstring = '';
3473: if ($target eq 'web') {
3474: $currentstring = $token->[2];
3475: }
3476: return $currentstring;
3477: }
3478:
3479: #-- <marquee> tag (end tag optional)
3480: sub start_marquee {
3481: my ($target,$token) = @_;
3482: my $currentstring = '';
3483: if ($target eq 'web') {
3484: $currentstring = $token->[4];
3485: }
3486: return $currentstring;
3487: }
3488:
3489: sub end_marquee {
3490: my ($target,$token) = @_;
3491: my $currentstring = '';
3492: if ($target eq 'web') {
3493: $currentstring = $token->[2];
3494: }
3495: return $currentstring;
3496: }
3497:
3498: #-- <multicol> tag (end tag required)
3499: sub start_multicol {
3500: my ($target,$token) = @_;
3501: my $currentstring = &end_p(); # Close any pending <p>
3502: if ($target eq 'web') {
3503: $currentstring .= $token->[4];
3504: }
3505: return $currentstring;
3506: }
3507:
3508: sub end_multicol {
3509: my ($target,$token) = @_;
3510: my $currentstring = '';
3511: if ($target eq 'web') {
3512: $currentstring = $token->[2];
3513: }
3514: return $currentstring;
3515: }
3516:
3517: #-- <nobr> tag (end tag required)
3518: sub start_nobr {
3519: my ($target,$token) = @_;
3520: my $currentstring = '';
3521: if ($target eq 'web') {
3522: $currentstring = $token->[4];
3523: } elsif ($target eq 'tex') {
3524: $currentstring='\mbox{';
3525: }
3526: return $currentstring;
3527: }
3528:
3529: sub end_nobr {
3530: my ($target,$token) = @_;
3531: my $currentstring = '';
3532: if ($target eq 'web') {
3533: $currentstring = $token->[2];
3534: } elsif ($target eq 'tex') {
3535: $currentstring='}';
3536: }
3537: return $currentstring;
3538: }
3539:
3540: #-- <noembed> tag (end tag required)
3541: sub start_noembed {
3542: my ($target,$token) = @_;
3543: my $currentstring = '';
3544: if ($target eq 'web') {
3545: $currentstring = $token->[4];
3546: }
3547: return $currentstring;
3548: }
3549:
3550: sub end_noembed {
3551: my ($target,$token) = @_;
3552: my $currentstring = '';
3553: if ($target eq 'web') {
3554: $currentstring = $token->[2];
3555: }
3556: return $currentstring;
3557: }
3558:
3559: #-- <noframes> tag (end tag required)
3560: sub start_noframes {
3561: my ($target,$token) = @_;
3562: my $currentstring = '';
3563: if ($target eq 'web') {
3564: $currentstring = $token->[4];
3565: }
3566: return $currentstring;
3567: }
3568:
3569: sub end_noframes {
3570: my ($target,$token) = @_;
3571: my $currentstring = '';
3572: if ($target eq 'web') {
3573: $currentstring = $token->[2];
3574: }
3575: return $currentstring;
3576: }
3577:
3578: #-- <nolayer> tag (end tag required)
3579: sub start_nolayer {
3580: my ($target,$token) = @_;
3581: my $currentstring = '';
3582: if ($target eq 'web') {
3583: $currentstring = $token->[4];
3584: }
3585: return $currentstring;
3586: }
3587:
3588: sub end_nolayer {
3589: my ($target,$token) = @_;
3590: my $currentstring = '';
3591: if ($target eq 'web') {
3592: $currentstring = $token->[2];
3593: }
3594: return $currentstring;
3595: }
3596:
3597: #-- <noscript> tag (end tag required)
3598: sub start_noscript {
3599: my ($target,$token) = @_;
3600: my $currentstring = '';
3601: if ($target eq 'web') {
3602: $currentstring = $token->[4];
3603: }
3604: return $currentstring;
3605: }
3606:
3607: sub end_noscript {
3608: my ($target,$token) = @_;
3609: my $currentstring = '';
3610: if ($target eq 'web') {
3611: $currentstring = $token->[2];
3612: }
3613: return $currentstring;
3614: }
3615:
3616: #-- <object> tag (end tag required)
3617: sub start_object {
3618: my ($target,$token) = @_;
3619: my $currentstring = '';
3620: if ($target eq 'web') {
3621: $currentstring = $token->[4];
3622: }
3623: return $currentstring;
3624: }
3625:
3626: sub end_object {
3627: my ($target,$token) = @_;
3628: my $currentstring = '';
3629: if ($target eq 'web') {
3630: $currentstring = $token->[2];
3631: }
3632: return $currentstring;
3633: }
3634:
3635: #-- <optgroup> tag (end tag required)
3636: sub start_optgroup {
3637: my ($target,$token) = @_;
3638: my $currentstring = '';
3639: if ($target eq 'web') {
3640: $currentstring = $token->[4];
3641: }
3642: return $currentstring;
3643: }
3644:
3645: sub end_optgroup {
3646: my ($target,$token) = @_;
3647: my $currentstring = '';
3648: if ($target eq 'web') {
3649: $currentstring = $token->[2];
3650: }
3651: return $currentstring;
3652: }
3653:
3654: #-- <samp> tag (end tag required)
3655: sub start_samp {
3656: my ($target,$token) = @_;
3657: my $currentstring = '';
3658: if ($target eq 'web') {
3659: $currentstring = $token->[4];
3660: } elsif ($target eq 'tex') {
3661: $currentstring='\texttt{';
3662: }
3663: return $currentstring;
3664: }
3665:
3666: sub end_samp {
3667: my ($target,$token) = @_;
3668: my $currentstring = '';
3669: if ($target eq 'web') {
3670: $currentstring = $token->[2];
3671: } elsif ($target eq 'tex') {
3672: $currentstring='}';
3673: }
3674: return $currentstring;
3675: }
3676:
3677: #-- <server> tag
3678: sub start_server {
3679: my ($target,$token) = @_;
3680: my $currentstring = '';
3681: if ($target eq 'web') {
3682: $currentstring = $token->[4];
3683: }
3684: return $currentstring;
3685: }
3686:
3687: sub end_server {
3688: my ($target,$token) = @_;
3689: my $currentstring = '';
3690: if ($target eq 'web') {
3691: $currentstring = $token->[2];
3692: }
3693: return $currentstring;
3694: }
3695:
3696: #-- <spacer> tag (end tag forbidden)
3697: sub start_spacer {
3698: my ($target,$token) = @_;
3699: my $currentstring = &end_p(); # Close off any open <p> tag.
3700: if ($target eq 'web') {
3701: $currentstring .= $token->[4];
3702: }
3703: return $currentstring;
3704: }
3705:
3706: sub end_spacer {
3707: my ($target,$token) = @_;
3708: my $currentstring = '';
3709: if ($target eq 'web') {
3710: $currentstring = $token->[2];
3711: }
3712: return $currentstring;
3713: }
3714:
3715: #-- <span> tag (end tag required)
3716: sub start_span {
3717: my ($target,$token) = @_;
3718: my $currentstring = '';
3719: if ($target eq 'web') {
3720: $currentstring = $token->[4];
3721: }
3722: return $currentstring;
3723: }
3724:
3725: sub end_span {
3726: my ($target,$token) = @_;
3727: my $currentstring = '';
3728: if ($target eq 'web') {
3729: $currentstring = $token->[2];
3730: }
3731: return $currentstring;
3732: }
3733:
3734: #-- <tbody> tag (end tag optional)
3735: sub start_tbody {
3736: my ($target,$token) = @_;
3737: my $currentstring = '';
3738: if ($target eq 'web') {
3739: $currentstring = $token->[4];
3740: }
3741: return $currentstring;
3742: }
3743:
3744: sub end_tbody {
3745: my ($target,$token) = @_;
3746: my $currentstring = '';
3747: if ($target eq 'web') {
3748: $currentstring = $token->[2];
3749: }
3750: return $currentstring;
3751: }
3752:
3753: #-- <tfoot> tag (end tag optional)
3754: sub start_tfoot {
3755: my ($target,$token) = @_;
3756: my $currentstring = '';
3757: if ($target eq 'web') {
3758: $currentstring = $token->[4];
3759: }
3760: return $currentstring;
3761: }
3762:
3763: sub end_tfoot {
3764: my ($target,$token) = @_;
3765: my $currentstring = '';
3766: if ($target eq 'web') {
3767: $currentstring = $token->[2];
3768: }
3769: return $currentstring;
3770: }
3771:
3772: #-- <thead> tag (end tag optional)
3773: sub start_thead {
3774: my ($target,$token) = @_;
3775: my $currentstring = '';
3776: if ($target eq 'web') {
3777: $currentstring = $token->[4];
3778: }
3779: return $currentstring;
3780: }
3781:
3782: sub end_thead {
3783: my ($target,$token) = @_;
3784: my $currentstring = '';
3785: if ($target eq 'web') {
3786: $currentstring = $token->[2];
3787: }
3788: return $currentstring;
3789: }
3790:
3791: #-- <var> tag
3792: sub start_var {
3793: my ($target,$token) = @_;
3794: my $currentstring = '';
3795: if ($target eq 'web') {
3796: $currentstring = $token->[4];
3797: } elsif ($target eq 'tex') {
3798: $currentstring = '\textit{';
3799: }
3800: return $currentstring;
3801: }
3802:
3803: sub end_var {
3804: my ($target,$token) = @_;
3805: my $currentstring = '';
3806: if ($target eq 'web') {
3807: $currentstring = $token->[2];
3808: } elsif ($target eq 'tex') {
3809: $currentstring = '}';
3810: }
3811: return $currentstring;
3812: }
3813:
3814: #-- <wbr> tag (end tag forbidden)
3815: sub start_wbr {
3816: my ($target,$token) = @_;
3817: my $currentstring = '';
3818: if ($target eq 'web') {
3819: $currentstring = $token->[4];
3820: }
3821: return $currentstring;
3822: }
3823:
3824: sub end_wbr {
3825: my ($target,$token) = @_;
3826: my $currentstring = '';
3827: if ($target eq 'web') {
3828: $currentstring = $token->[2];
3829: }
3830: return $currentstring;
3831: }
3832:
3833: #-- <hideweboutput> tag
3834: sub start_hideweboutput {
3835: my ($target,$token) = @_;
3836: if ($target eq 'web') {
3837: &Apache::lonxml::startredirection();
3838: }
3839: return '';
3840: }
3841:
3842: sub end_hideweboutput {
3843: my ($target,$token) = @_;
3844: my $currentstring = '';
3845: if ($target eq 'web') {
3846: $currentstring = &Apache::lonxml::endredirection();
3847: }
3848: return '';
3849: }
3850:
3851:
3852: sub image_replication {
3853: my $src = shift;
3854: if (not -e $src) { &Apache::lonnet::repcopy($src); }
3855: #replicates eps or ps
3856: my $epssrc = my $pssrc = $src;
3857: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
3858: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
3859: if (not -e $epssrc && not -e $pssrc) {
3860: my $result=&Apache::lonnet::repcopy($epssrc);
3861: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
3862: }
3863: return '';
3864: }
3865: #
3866: # Get correct sizing parameter for an image given
3867: # it's initial ht. and wid. This allows sizing of
3868: # images that are generated on-the-fly (e.g. gnuplot)
3869: # as well as serving as a utility for image_size.
3870: #
3871: # Parameter:
3872: # height_param
3873: # width_param - Initial picture dimensions.
3874: # scaling - A scale factor.
3875: # parstack, - the current stack of tag attributes
3876: # from the xml parser
3877: # safeeval, - pointer to the safespace
3878: # depth, - from what level in the stack to look for attributes
3879: # (assumes -1 if unspecified)
3880: # cis - look for attrubutes case insensitively
3881: # (assumes false)
3882: #
3883: # Returns:
3884: # height, width - new dimensions.
3885: #
3886: sub resize_image {
3887: my ($height_param, $width_param, $scaling,
3888: $parstack, $safeeval, $depth, $cis) = @_;
3889:
3890: # First apply the scaling...
3891:
3892: $height_param = $height_param * $scaling;
3893: $width_param = $width_param * $scaling;
3894:
3895: #do we have any specified LaTeX size of the picture?
3896: my $toget='TeXwidth';
3897: if ($cis) {
3898: $toget=lc($toget);
3899: }
3900: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
3901: $safeeval,$depth,$cis);
3902: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
3903: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
3904: $safeeval,$depth,$cis);
3905: #do we have any specified web size of the picture?
3906: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
3907: $depth,1);
3908: if ($TeXwidth) {
3909: my $old_width_param=$width_param;
3910: if ($TeXwidth=~/(\d+)\s*\%/) {
3911: $width_param = $1*$env{'form.textwidth'}/100;
3912: } else {
3913: $width_param = $TeXwidth;
3914: }
3915: if ($TeXheight) {
3916: $height_param = $TeXheight;
3917: } elsif ($old_width_param) {
3918: $height_param=$TeXwidth/$old_width_param*$height_param;
3919: }
3920: } elsif ($TeXheight) {
3921: $height_param = $TeXheight;
3922: if ($height_param) {
3923: $width_param = $TeXheight/$height_param*$width_param;
3924: }
3925: } elsif ($width) {
3926: my $old_width_param=$width_param;
3927: $width_param = $width*$scaling;
3928: if ($old_width_param) {
3929: $height_param=$width_param/$old_width_param*$height_param;
3930: }
3931: }
3932: if ($width_param > $env{'form.textwidth'}) {
3933: my $old_width_param=$width_param;
3934: $width_param =0.95*$env{'form.textwidth'};
3935: if ($old_width_param) {
3936: $height_param=$width_param/$old_width_param*$height_param;
3937: }
3938: }
3939:
3940: return ($height_param, $width_param);
3941: }
3942:
3943: sub image_size {
3944: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
3945:
3946: #size of image from gif/jpg/jpeg/png
3947: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
3948: if (-e $ressrc) {
3949: $src = $ressrc;
3950: }
3951: my $image = Image::Magick->new;
3952: my $current_figure = $image->Read($src);
3953: my $width_param = $image->Get('width');
3954: my $height_param = $image->Get('height');
3955: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
3956: undef($image);
3957:
3958: ($height_param, $width_param) = &resize_image($height_param, $width_param,
3959: $scaling, $parstack, $safeeval,
3960: $depth, $cis);
3961:
3962: return ($height_param, $width_param);
3963: }
3964:
3965: sub image_width {
3966: my ($height, $width) = &image_size(@_);
3967: return $width;
3968: }
3969: # Not yet 100% sure this is correct in all circumstances..
3970: # due to my uncertainty about mods to image_size.
3971: #
3972: sub image_height {
3973: my ($height, $width) = &image_size(@_);
3974: return $height;
3975: }
3976:
3977: sub get_eps_image {
3978: my ($src)=@_;
3979: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
3980:
3981: # In order to prevent the substitution of the alt text, we need to
3982: # be sure the orig_src file is on system now so:
3983:
3984: if (! -e $orig_src) {
3985: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
3986: }
3987: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
3988: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
3989: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
3990: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
3991: &Apache::lonxml::debug("Filelocation gives: $src");
3992: if (! -e $src) {
3993: &Apache::lonxml::debug("$src does not exist");
3994: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
3995: &Apache::lonxml::debug("Repcopy of $src failed (1)");
3996: #if replication failed try to find ps file
3997: $src=~s/\.eps$/\.ps/;
3998: &Apache::lonxml::debug("Now looking for $src");
3999: #if no ps file try to replicate it.
4000: my $didrepcopy = &Apache::lonnet::repcopy($src);
4001: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4002: if ( (not -e $src) ||
4003: ($didrepcopy ne 'ok')) {
4004: &Apache::lonxml::debug("Failed to find or replicate $src");
4005:
4006: #if replication failed try to produce eps file dynamically
4007: $src=~s/\.ps$/\.eps/;
4008: my $temp_file;
4009: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4010: my $newsrc=$orig_src;
4011: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4012: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4013: print FILE "$newsrc\n";
4014: close FILE;
4015: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4016: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4017: if ($sext ne "") { # Put the ext. back in to uniquify.
4018: $src =~ s/\.eps$/$sext.eps/;
4019: }
4020: }
4021: }
4022: }
4023: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4024: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4025: return ($path.'/',$file);
4026: }
4027:
4028: sub eps_generation {
4029: my ($src,$file,$width_param) = @_;
4030: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4031: my $temp_file = Apache::File->new('>>'.$filename);
4032: print $temp_file "$src\n";
4033: my $newsrc = $src;
4034: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4035: $newsrc=~s/\/home\/httpd\/html\/res//;
4036: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4037: $newsrc=~s/\/\.\//\//;
4038: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4039: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4040: $newsrc=~s/\/home\/httpd\/lonUsers//;
4041: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4042: }
4043: if ($newsrc=~/\/userfiles\//) {
4044: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4045: } else {
4046: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4047: }
4048: }
4049:
4050: sub file_path {
4051: my $src=shift;
4052: my ($file,$path);
4053: if ($src =~ m!(.*)/([^/]*)$!) {
4054: $file = $2;
4055: $path = $1.'/';
4056: }
4057: return $file,$path;
4058: }
4059:
4060: sub recalc {
4061: my $argument = shift;
4062: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4063: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4064: my $value=$1;
4065: my $units=$2;
4066: if ($units eq 'cm') {
4067: $value*=10;
4068: } elsif ($units eq 'in') {
4069: $value*=25.4;
4070: } elsif ($units eq 'pc') {
4071: $value*=(25.4*12/72.27);
4072: } elsif ($units eq 'pt') {
4073: $value*=(25.4/72.27);
4074: }
4075: return $value.' mm';
4076: }
4077:
4078: sub LATEX_length {
4079: my $garbage=shift;
4080: $garbage=~s/^\s+$//;
4081: $garbage=~s/^\s+(\S.*)/$1/;#space before
4082: $garbage=~s/(.*\S)\s+$/$1/;#space after
4083: $garbage=~s/(\s)+/$1/;#only one space
4084: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4085: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4086: $garbage=~s/([^\\])\$/$1/g;#$
4087: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4088: $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;
4089: $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;
4090: $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;
4091: $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;
4092: $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;
4093: $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;
4094: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4095: #remove some other LaTeX command
4096: $garbage=~s|\\(\w+)\\|\\|g;
4097: $garbage=~s|\\(\w+)(\s*)|$2|g;
4098: $garbage=~s|\+|11|g;
4099: my $value=length($garbage);
4100: return $value;
4101: }
4102:
4103:
4104: # is_inside_of $tagstack $tag
4105: # This sub returns true if the current state of Xml processing
4106: # is inside of the tag.
4107: # Parameters:
4108: # tagstack - The tagstack from the parser.
4109: # tag - The tag (without the <>'s.).
4110: # Sample usage:
4111: # if (is_inside_of($tagstack "table")) {
4112: # # I'm in a table....
4113: # }
4114: sub is_inside_of {
4115: my ($tagstack, $tag) = @_;
4116: my @stack = @$tagstack;
4117: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4118: if ($stack[$i] eq $tag) {
4119: return 1;
4120: }
4121: }
4122: return 0;
4123: }
4124:
4125:
4126: 1;
4127: __END__
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