1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.324 2006/03/23 23:47:12 albertel Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: # use Data::Dumper;
52:
53: BEGIN {
54:
55: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
56:
57: }
58:
59: #
60: # Dumps all elements of the table structure.
61: # Need this 'cause evidently when given an array, Data::Dumper only seems
62: # to dump element 0.
63: #
64: #sub debug_dump_table {
65: # my $lastrow = $#Apache::londefdef::table;
66: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
67: # my $row;
68: # for ($row =0; $row <= $lastrow; $row++ ) {
69: # my $text = Dumper($Apache::londefdef::table[$row]);
70: # &Apache::lonnet::logthis("table [ $row ]".$text);
71: # }
72: #}
73: sub initialize_londefdef {
74: $Apache::londefdef::TD_redirection=0;
75: @Apache::londefdef::table = ();
76: $Apache::londefdef::select=0;
77: undef(@Apache::londefdef::description);
78: @Apache::londefdef::DD=(0);
79: @Apache::londefdef::DT=(0);
80: @Apache::londefdef::seenDT=(0);
81: $Apache::londefdef::list_index=0;
82: }
83:
84: #======================= TAG SUBROUTINES =====================
85: #-- <output>
86: sub start_output {
87: my ($target) = @_;
88: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
89: return '';
90: }
91: sub end_output {
92: my ($target) = @_;
93: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
94: return '';
95: }
96: #-- <m> tag
97: sub start_m {
98: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
99: my $currentstring = '';
100: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
101: if ($target eq 'web' || $target eq 'analyze') {
102: &Apache::lonxml::debug("M is starting with:$inside:");
103: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
104: if ($eval eq 'on') {
105: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
106: #&Apache::lonxml::debug("M is evaulated to:$inside:");
107: }
108: my $tex = $inside;
109: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
110: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
111: if ($Apache::lontexconvert::errorstring) {
112: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
113: $tex = &HTML::Entities::encode($tex,'<>&"');
114: my ($linenumber) =
115: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
116: if (defined($linenumber)) {
117: my @tex=split("\n",$tex);
118: $tex[$linenumber]='<b><font color="red">'.
119: $tex[$linenumber].'</font></b>';
120: $tex=join("\n",@tex);
121: }
122: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
123: $Apache::lontexconvert::errorstring='';
124: }
125: #&Apache::lonxml::debug("M is ends with:$currentstring:");
126: $Apache::lonxml::post_evaluate=0;
127: } elsif ($target eq 'tex') {
128: $currentstring = $inside;
129: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
130: if ($eval eq 'on') {
131: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
132: }
133: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
134: # detect simple math mode entry exits, and convert them
135: # to use \ensuremath
136: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
137: $currentstring=~s/^(\s*)\$/$1/;
138: $currentstring=~s/\$(\s*)$/$1/;
139: $currentstring='\ensuremath{'.$currentstring.'}';
140: }
141: $Apache::lonxml::post_evaluate=0;
142: }
143: return $currentstring;
144: }
145:
146: sub end_m {
147: my ($target,$token) = @_;
148: my $currentstring = '';
149: if ($target eq 'tex') {
150: $currentstring = "";
151: }
152: return $currentstring;
153: }
154:
155: sub start_tthoption {
156: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
157: my $result;
158: if ($target eq 'web') {
159: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
160: $style);
161: $inside=~s/^\s*//;
162: if ($env{'browser.mathml'}) {
163: &tth::ttmoptions($inside);
164: } else {
165: &tth::tthoptions($inside);
166: }
167: }
168: return $result;
169: }
170:
171: sub end_tthoption {
172: my ($target,$token) = @_;
173: my $result;
174: return $result;
175: }
176:
177: #-- <html> tag (end tag optional)
178: sub start_html {
179: my ($target,$token) = @_;
180: my $currentstring = '';
181: my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
182: &Apache::lontexconvert::init_tth();
183: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
184: $currentstring = &Apache::lonxml::xmlbegin();
185: } elsif ($target eq 'tex') {
186: $currentstring .= '\documentclass[letterpaper,twoside]{article}';
187: if (($env{'form.latex_type'}=~'batchmode') ||
188: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
189: $currentstring .= '\newcommand{\keephidden}[1]{}'.
190: '\renewcommand{\deg}{$^{\circ}$}'.
191: '\usepackage{multirow}'.
192: '\usepackage{longtable}'.
193: '\usepackage{textcomp}'.
194: '\usepackage{makeidx}'.
195: '\usepackage[dvips]{graphicx}'.
196: '\usepackage{wrapfig}'.
197: '\usepackage{picins}'.
198: '\usepackage{epsfig}'.
199: '\usepackage{calc}'.
200: '\usepackage{amsmath}'.
201: '\usepackage{amssymb}'.
202: '\usepackage{amsfonts}'.
203: '\usepackage{amsthm}'.
204: '\usepackage{amscd}'.
205: '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'.
206: '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}';
207: }
208: return $currentstring;
209: }
210:
211: sub end_html {
212: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
213: my $currentstring = '';
214: if ($target eq 'web' || $target eq 'webgrade') {
215: $currentstring = '</html>';
216: }
217: return $currentstring;
218: }
219:
220: #-- <head> tag (end tag optional)
221: sub start_head {
222: my ($target,$token) = @_;
223: my $currentstring = '';
224: if ($target eq 'web' || $target eq 'webgrade') {
225: $currentstring = $token->[4].&Apache::lonxml::fontsettings();
226: }
227: return $currentstring;
228: }
229:
230: sub end_head {
231: my ($target,$token) = @_;
232: my $currentstring = '';
233: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
234: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
235: $currentstring = &Apache::lonmenu::registerurl(undef,$target).
236: $token->[2];
237: }
238: return $currentstring;
239: }
240:
241: #-- <map> tag (end tag required)
242: sub start_map {
243: my ($target,$token) = @_;
244: my $currentstring = '';
245: if ($target eq 'web') {
246: $currentstring = $token->[4];
247: }
248: return $currentstring;
249: }
250:
251: sub end_map {
252: my ($target,$token) = @_;
253: my $currentstring = '';
254: if ($target eq 'web') {
255: $currentstring = $token->[2];
256: }
257: return $currentstring;
258: }
259:
260: #-- <select> tag (end tag required)
261: sub start_select {
262: my ($target,$token) = @_;
263: my $currentstring = '';
264: if ($target eq 'web') {
265: $currentstring = $token->[4];
266: } elsif ($target eq 'tex') {
267: $Apache::londefdef::select=0;
268: }
269: return $currentstring;
270: }
271:
272: sub end_select {
273: my ($target,$token) = @_;
274: my $currentstring = '';
275: if ($target eq 'web') {
276: $currentstring = $token->[2];
277: }
278: return $currentstring;
279: }
280:
281: #-- <option> tag (end tag optional)
282: sub start_option {
283: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
284: my $currentstring = '';
285: if ($target eq 'web') {
286: $currentstring = $token->[4];
287: } elsif ($target eq 'tex') {
288: $Apache::londefdef::select++;
289: if ($Apache::londefdef::select == 1) {
290: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
291: } else {
292: $currentstring='\keephidden{';
293: }
294: }
295: return $currentstring;
296: }
297:
298: sub end_option {
299: my ($target,$token) = @_;
300: my $currentstring = '';
301: if ($target eq 'web') {
302: $currentstring = $token->[2];
303: } elsif ($target eq 'tex') {
304: $currentstring='}';
305: }
306: return $currentstring;
307: }
308:
309: #-- <input> tag (end tag forbidden)
310: sub start_input {
311: my ($target,$token) = @_;
312: my $currentstring = '';
313: if ($target eq 'web') {
314: $currentstring = $token->[4];
315: }
316: return $currentstring;
317: }
318:
319: sub end_input {
320: my ($target,$token) = @_;
321: my $currentstring = '';
322: if ($target eq 'web') {
323: $currentstring = $token->[2];
324: }
325: return $currentstring;
326: }
327:
328: #-- <textarea> tag (end tag required)
329: sub start_textarea {
330: my ($target,$token) = @_;
331: my $currentstring = '';
332: if ($target eq 'web') {
333: $currentstring = $token->[4];
334: }
335: return $currentstring;
336: }
337:
338: sub end_textarea {
339: my ($target,$token) = @_;
340: my $currentstring = '';
341: if ($target eq 'web') {
342: $currentstring = $token->[2];
343: }
344: return $currentstring;
345: }
346:
347: #-- <form> tag (end tag required)
348: sub start_form {
349: my ($target,$token) = @_;
350: my $currentstring = '';
351: if ($target eq 'web') {
352: $currentstring = $token->[4];
353: }
354: return $currentstring;
355: }
356:
357: sub end_form {
358: my ($target,$token) = @_;
359: my $currentstring = '';
360: if ($target eq 'web') {
361: $currentstring = $token->[2];
362: }
363: return $currentstring;
364: }
365:
366: #-- <title> tag (end tag required)
367: sub start_title {
368: my ($target,$token) = @_;
369: my $currentstring = '';
370: if ($target eq 'web' || $target eq 'webgrade') {
371: $currentstring = $token->[4];
372: } elsif ($target eq 'tex') {
373: $currentstring .= '\keephidden{Title of the document: '
374: }
375: if ($target eq 'meta') {
376: $currentstring='<title>';
377: &start_output($target);
378: }
379: return $currentstring;
380: }
381:
382: sub end_title {
383: my ($target,$token) = @_;
384: my $currentstring = '';
385: if ($target eq 'web' || $target eq 'webgrade') {
386: $currentstring = $token->[2];
387: } elsif ($target eq 'tex') {
388: $currentstring .= '}';
389: }
390: if ($target eq 'meta') {
391: &end_output($target);
392: $currentstring='</title>';
393: }
394: return $currentstring;
395: }
396:
397: #-- <meta> tag (end tag forbidden)
398: sub start_meta {
399: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
400: my $currentstring = '';
401: if ($target eq 'web') {
402: my $args='';
403: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
404: if ($args eq '') {
405: &Apache::lonxml::get_all_text("/meta",$parser,$style);
406: } else {
407: $currentstring = $token->[4];
408: }
409: } elsif ($target eq 'meta') {
410: unless (&Apache::lonxml::get_param
411: ('http-equiv',$parstack,$safeeval,undef,1)) {
412: my $name=$token->[2]->{'name'};
413: $name=~tr/A-Z/a-z/;
414: $name=~s/\s/\_/gs;
415: $name=~s/\W//gs;
416: if ($name) {
417: $currentstring='<'.$name;
418: my $display=&Apache::lonxml::get_param
419: ('display',$parstack,$safeeval,undef,1);
420: if ($display) {
421: $display=~s/\"/\'/g;
422: $currentstring.=' display="'.$display.'"';
423: }
424: $currentstring.='>'.
425: &Apache::lonxml::get_param
426: ('content',$parstack,$safeeval,undef,1).
427: '</'.$name.'>';
428: }
429: my $display=&Apache::lonxml::get_param
430: ('display',$parstack,$safeeval,undef,1);
431: if ($display) {
432: $display=&HTML::Entities::encode($display,'<>&"');
433: $currentstring.='<'.$name.'.display>'.$display.
434: '</'.$name.'.display>';
435: }
436: }
437: } elsif ($target eq 'tex') {
438: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
439: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
440: if ((not defined $content) && (not defined $name)) {
441: &Apache::lonxml::startredirection();
442: }
443: }
444: return $currentstring;
445: }
446:
447: sub end_meta {
448: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
449: my $currentstring = '';
450: if ($target eq 'web') {
451: my $args='';
452: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
453: if ($args ne '') {
454: $currentstring = $token->[4];
455: }
456: } elsif ($target eq 'tex') {
457: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
458: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
459: if ((not defined $content) && (not defined $name)) {
460: &Apache::lonxml::endredirection();
461: }
462: }
463: return $currentstring;
464: }
465:
466: # accessrule
467: sub start_accessrule {
468: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
469: my $currentstring = '';
470: my $eff=&Apache::lonxml::get_param
471: ('effect',$parstack,$safeeval,undef,1);
472: my $realm=&Apache::lonxml::get_param
473: ('realm',$parstack,$safeeval,undef,1);
474: my $role=&Apache::lonxml::get_param
475: ('role',$parstack,$safeeval,undef,1);
476: $realm=~s/\s+//g;
477: $realm=~s/\//\_/g;
478: $realm=~s/^\_//;
479: $realm=~s/\W/\;/g;
480: $role=~s/\s+//g;
481: $role=~s/\//\_/g;
482: $role=~s/\W/\;/g;
483: if ($target eq 'web') {
484: my $args='';
485: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
486: if ($args eq '') {
487: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
488: } else {
489: $currentstring = $token->[4];
490: }
491: }
492: if ($target eq 'meta') {
493: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
494: }
495: return $currentstring;
496: }
497:
498: sub end_accessrule {
499: my ($target,$token,$tagstack,$parstack,$parser) = @_;
500: my $currentstring = '';
501: if ($target eq 'web') {
502: my $args='';
503: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
504: if ($args ne '') {
505: $currentstring = $token->[4];
506: }
507: }
508: return $currentstring;
509: }
510:
511: #-- <body> tag (end tag required)
512: sub start_body {
513: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
514: my $currentstring = '';
515:
516: if ($target eq 'web' || $target eq 'webgrade') {
517: if ($Apache::lonhomework::parsing_a_problem) {
518: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
519: return '';
520: }
521: if (!$Apache::lonxml::registered &&
522: $env{'request.state'} eq 'published') {
523: $currentstring.='<head>'.
524: &Apache::lonmenu::registerurl(undef,$target).'</head>';
525: }
526: # Accessibility
527: if ($env{'browser.imagesuppress'} eq 'on') {
528: delete($token->[2]->{'background'});
529: }
530: if ($env{'browser.fontenhance'} eq 'on') {
531: my $style='';
532: foreach my $key (keys(%{$token->[2]})) {
533: if ($key =~ /^style$/i) {
534: $style.=$token->[2]->{$key}.';';
535: delete($token->[2]->{$key});
536: }
537: }
538: $token->[2]->{'style'}=$style.'; font-size: x-large;';
539: }
540: if ($env{'browser.blackwhite'} eq 'on') {
541: delete($token->[2]->{'font'});
542: delete($token->[2]->{'link'});
543: delete($token->[2]->{'alink'});
544: delete($token->[2]->{'vlink'});
545: delete($token->[2]->{'bgcolor'});
546: delete($token->[2]->{'background'});
547: }
548: # Overload loads
549: my $onLoad='';
550: foreach my $key (keys(%{$token->[2]})) {
551: if ($key =~ /^onload$/i) {
552: $onLoad.=$token->[2]->{$key}.';';
553: delete($token->[2]->{$key});
554: }
555: }
556: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
557: my $onUnload='';
558: foreach my $key (keys(%{$token->[2]})) {
559: if ($key =~ /^onunload$/i) {
560: $onUnload.=$token->[2]->{$key}.';';
561: delete($token->[2]->{$key});
562: }
563: }
564: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
565: ';'.$onUnload;
566:
567: $currentstring .= '<'.$token->[1];
568: foreach (keys %{$token->[2]}) {
569: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
570: }
571: $currentstring.='>';
572: &Apache::lontexconvert::jsMath_reset();
573: if ($env{'environment.texengine'} eq 'jsMath') {
574: $currentstring.=&Apache::lontexconvert::jsMath_header();
575: }
576: if ($env{'request.state'} ne 'published') {
577: if ($env{'environment.remote'} eq 'off') {
578: $currentstring.=
579: &Apache::lonmenu::constspaceform().
580: &Apache::lonmenu::menubuttons(1,'web',1);
581: }
582: $currentstring.=(<<EDITBUTTON);
583: <form method="post">
584: <input type="submit" name="editmode" accesskey="e" value="Edit" />
585: </form>
586: EDITBUTTON
587: } else {
588: $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
589: }
590: $currentstring.=&Apache::lonxml::message_location();
591: } elsif ($target eq 'tex') {
592: $currentstring = '\begin{document}';
593: }
594: return $currentstring;
595: }
596:
597: sub end_body {
598: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
599: my $currentstring = &end_p(); # Close off unclosed <p>
600: if ($target eq 'web' || $target eq 'webgrade') {
601: $currentstring .= &Apache::lonxml::xmlend($target,$parser);
602: } elsif ($target eq 'tex') {
603: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
604: }
605: return $currentstring;
606: }
607:
608: # \begin{center} causes a new paragprah spacing that looks odd inside
609: # of a table cell
610: sub center_correction { return '\vspace*{-6 mm}'; }
611: #-- <center> tag (end tag required)
612: sub start_center {
613: my ($target,$token,$tagstack) = @_;
614: my $currentstring = &end_p(); # Close off any prior para.
615: if ($target eq 'web') {
616: $currentstring .= $token->[4];
617: } elsif ($target eq 'tex') {
618: if (&is_inside_of($tagstack, "table")) {
619: $currentstring .= ¢er_correction();
620: }
621: $currentstring .= '\begin{center}';
622: }
623: return $currentstring;
624: }
625:
626: sub end_center {
627: my ($target,$token,$tagstack) = @_;
628: my $currentstring = '';
629: if ($target eq 'web') {
630: $currentstring = $token->[2];
631: } elsif ($target eq 'tex') {
632: $currentstring = '\end{center}';
633: }
634: return $currentstring;
635: }
636:
637: #-- <b> tag (end tag required)
638: # NOTE: In TeX mode disables internal <p>
639: sub start_b {
640: my ($target,$token) = @_;
641: my $currentstring = '';
642: if ($target eq 'web') {
643: $currentstring = $token->[4];
644: } elsif ($target eq 'tex') {
645: &disable_para();
646: $currentstring .= '\textbf{';
647: }
648: return $currentstring;
649: }
650:
651: sub end_b {
652: my ($target,$token) = @_;
653: my $currentstring = '';
654: if ($target eq 'web') {
655: $currentstring = $token->[2];
656: } elsif ($target eq 'tex') {
657: &enable_para();
658: $currentstring = '}';
659: }
660: return $currentstring;
661: }
662:
663: #-- <strong> tag (end tag required)
664: # NOTE: in TeX mode disables internal <p>
665: sub start_strong {
666: my ($target,$token) = @_;
667: my $currentstring = '';
668: if ($target eq 'web') {
669: $currentstring = $token->[4];
670: } elsif ($target eq 'tex') {
671: &disable_para();
672: $currentstring = '\textbf{';
673: }
674: return $currentstring;
675: }
676:
677: sub end_strong {
678: my ($target,$token) = @_;
679: my $currentstring = '';
680: if ($target eq 'web') {
681: $currentstring = $token->[2];
682: } elsif ($target eq 'tex') {
683: &enable_para();
684: $currentstring = '}';
685: }
686: return $currentstring;
687: }
688:
689: #-- <h1> tag (end tag required)
690: sub start_h1 {
691: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
692: my $currentstring = &end_p(); # Close off any prior para.
693: if ($target eq 'web') {
694: $currentstring .= $token->[4];
695: } elsif ($target eq 'tex') {
696: my $pre;
697: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
698: if ($align eq 'center') {
699: $pre='\begin{center}';
700: } elsif ($align eq 'left') {
701: $pre='\rlap{';
702: } elsif ($align eq 'right') {
703: $pre=' \hfill \llap{';
704: }
705: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
706: if (not defined $TeXsize) {$TeXsize="large";}
707: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
708: } elsif ($target eq 'meta') {
709: $currentstring.='<subject>';
710: &start_output($target);
711: }
712: return $currentstring;
713: }
714:
715: sub end_h1 {
716: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
717: my $currentstring = '';
718: if ($target eq 'web') {
719: $currentstring .= $token->[2];
720: } elsif ($target eq 'tex') {
721: my $post='\vskip 0 mm ';
722: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
723: if ($align eq 'center') {
724: $post='\end{center}';
725: } elsif ($align eq 'left') {
726: $post='} \hfill'.'\vskip 0 mm ';
727: } elsif ($align eq 'right') {
728: $post='}'.'\vskip 0 mm ';
729: }
730: $currentstring .= '}}'.$post;
731: } elsif ($target eq 'meta') {
732: &end_output($target);
733: $currentstring='</subject>';
734: }
735: return $currentstring;
736: }
737:
738: #-- <h2> tag
739: sub start_h2 {
740: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
741: my $currentstring = &end_p(); # Close off any prior para.
742: if ($target eq 'web') {
743: $currentstring .= $token->[4];
744: } elsif ($target eq 'tex') {
745: my $pre;
746: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
747: if ($align eq 'center') {
748: $pre='\begin{center}';
749: } elsif ($align eq 'left') {
750: $pre='\rlap{';
751: } elsif ($align eq 'right') {
752: $pre=' \hfill \llap{';
753: }
754: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
755: if (not defined $TeXsize) {$TeXsize="large";}
756: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
757: }
758: return $currentstring;
759: }
760:
761: sub end_h2 {
762: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
763: my $currentstring = '';
764: if ($target eq 'web') {
765: $currentstring .= $token->[2];
766: } elsif ($target eq 'tex') {
767: my $post='\vskip 0 mm ';
768: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
769: if ($align eq 'center') {
770: $post='\end{center}';
771: } elsif ($align eq 'left') {
772: $post='} \hfill'.'\vskip 0 mm ';
773: } elsif ($align eq 'right') {
774: $post='}'.'\vskip 0 mm ';
775: }
776: $currentstring .= '}}'.$post;
777: }
778: return $currentstring;
779: }
780:
781: #-- <h3> tag
782: sub start_h3 {
783: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
784: my $currentstring = &end_p(); # Close off any prior para.
785: if ($target eq 'web') {
786: $currentstring .= $token->[4];
787: } elsif ($target eq 'tex') {
788: my $pre;
789: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
790: if ($align eq 'center') {
791: $pre='\begin{center}';
792: } elsif ($align eq 'left') {
793: $pre='\rlap{';
794: } elsif ($align eq 'right') {
795: $pre=' \hfill \llap{';
796: }
797: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
798: if (not defined $TeXsize) {$TeXsize="large";}
799: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
800: }
801: return $currentstring;
802: }
803:
804: sub end_h3 {
805: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
806: my $currentstring = '';
807: if ($target eq 'web') {
808: $currentstring .= $token->[2];
809: } elsif ($target eq 'tex') {
810: my $post='\vskip 0 mm ';
811: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
812: if ($align eq 'center') {
813: $post='\end{center}';
814: } elsif ($align eq 'left') {
815: $post='} \hfill'.'\vskip 0 mm ';
816: } elsif ($align eq 'right') {
817: $post='}'.'\vskip 0 mm ';
818: }
819: $currentstring .= '}}'.$post;
820: }
821: return $currentstring;
822: }
823:
824: #-- <h4> tag
825: sub start_h4 {
826: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
827: my $currentstring = &end_p(); # Close off any prior para.
828: if ($target eq 'web') {
829: $currentstring .= $token->[4];
830: } elsif ($target eq 'tex') {
831: my $pre;
832: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
833: if ($align eq 'center') {
834: $pre='\begin{center}';
835: } elsif ($align eq 'left') {
836: $pre='\rlap{';
837: } elsif ($align eq 'right') {
838: $pre=' \hfill \llap{';
839: }
840: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
841: if (not defined $TeXsize) {$TeXsize="large";}
842: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
843: }
844: return $currentstring;
845: }
846:
847: sub end_h4 {
848: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
849: my $currentstring = '';
850: if ($target eq 'web') {
851: $currentstring .= $token->[2];
852: } elsif ($target eq 'tex') {
853: my $post='\vskip 0 mm ';
854: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
855: if ($align eq 'center') {
856: $post='\end{center}';
857: } elsif ($align eq 'left') {
858: $post='} \hfill'.'\vskip 0 mm ';
859: } elsif ($align eq 'right') {
860: $post='}'.'\vskip 0 mm ';
861: }
862: $currentstring .= '}}'.$post;
863: }
864: return $currentstring;
865: }
866:
867: #-- <h5> tag
868: sub start_h5 {
869: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
870: my $currentstring = &end_p(); # Close off any prior paras.
871: if ($target eq 'web') {
872: $currentstring .= $token->[4];
873: } elsif ($target eq 'tex') {
874: my $pre;
875: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
876: if ($align eq 'center') {
877: $pre='\begin{center}';
878: } elsif ($align eq 'left') {
879: $pre='\rlap{';
880: } elsif ($align eq 'right') {
881: $pre=' \hfill \llap{';
882: }
883: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
884: if (not defined $TeXsize) {$TeXsize="large";}
885: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
886: }
887: return $currentstring;
888: }
889:
890: sub end_h5 {
891: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
892: my $currentstring = '';
893: if ($target eq 'web') {
894: $currentstring .= $token->[2];
895: } elsif ($target eq 'tex') {
896: my $post='\vskip 0 mm ';
897: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
898: if ($align eq 'center') {
899: $post='\end{center}';
900: } elsif ($align eq 'left') {
901: $post='} \hfill'.'\vskip 0 mm ';
902: } elsif ($align eq 'right') {
903: $post='}'.'\vskip 0 mm ';
904: }
905: $currentstring .= '}}'.$post;
906: }
907: return $currentstring;
908: }
909:
910: #-- <h6> tag
911: sub start_h6 {
912: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
913: my $currentstring = &end_p(); # Close off any prior paras.
914: if ($target eq 'web') {
915: $currentstring .= $token->[4];
916: } elsif ($target eq 'tex') {
917: my $pre;
918: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
919: if ($align eq 'center') {
920: $pre='\begin{center}';
921: } elsif ($align eq 'left') {
922: $pre='\rlap{';
923: } elsif ($align eq 'right') {
924: $pre=' \hfill \llap{';
925: }
926: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
927: if (not defined $TeXsize) {$TeXsize="large";}
928: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
929: }
930: return $currentstring;
931: }
932:
933: sub end_h6 {
934: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
935: my $currentstring = '';
936: if ($target eq 'web') {
937: $currentstring .= $token->[2];
938: } elsif ($target eq 'tex') {
939: my $post='\vskip 0 mm ';
940: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
941: if ($align eq 'center') {
942: $post='\end{center}';
943: } elsif ($align eq 'left') {
944: $post='} \hfill'.'\vskip 0 mm ';
945: } elsif ($align eq 'right') {
946: $post='}'.'\vskip 0 mm ';
947: }
948: $currentstring .= '}}'.$post;
949: }
950: return $currentstring;
951: }
952:
953: #--- <cite> tag (end tag required)
954: sub start_cite {
955: my ($target,$token) = @_;
956: my $currentstring = '';
957: if ($target eq 'web') {
958: $currentstring .= $token->[4];
959: } elsif ($target eq 'tex') {
960: $currentstring .= '\textit{';
961: }
962: return $currentstring;
963: }
964:
965: sub end_cite {
966: my ($target,$token) = @_;
967: my $currentstring = '';
968: if ($target eq 'web') {
969: $currentstring .= $token->[2];
970: } elsif ($target eq 'tex') {
971: $currentstring .= '}';
972: }
973: return $currentstring;
974: }
975:
976: #-- <i> tag (end tag required)
977: sub start_i {
978: my ($target,$token) = @_;
979: my $currentstring = '';
980: if ($target eq 'web') {
981: $currentstring .= $token->[4];
982: } elsif ($target eq 'tex') {
983: $currentstring .= '\textit{';
984: }
985: return $currentstring;
986: }
987:
988: sub end_i {
989: my ($target,$token) = @_;
990: my $currentstring = '';
991: if ($target eq 'web') {
992: $currentstring .= $token->[2];
993: } elsif ($target eq 'tex') {
994: $currentstring .= '}';
995: }
996: return $currentstring;
997: }
998:
999: #-- <address> tag (end tag required)
1000: sub start_address {
1001: my ($target,$token) = @_;
1002: my $currentstring = '';
1003: if ($target eq 'web') {
1004: $currentstring .= $token->[4];
1005: } elsif ($target eq 'tex') {
1006: $currentstring .= '\textit{';
1007: }
1008: return $currentstring;
1009: }
1010:
1011: sub end_address {
1012: my ($target,$token) = @_;
1013: my $currentstring = '';
1014: if ($target eq 'web') {
1015: $currentstring .= $token->[2];
1016: } elsif ($target eq 'tex') {
1017: $currentstring .= '}';
1018: }
1019: return $currentstring;
1020: }
1021:
1022: #-- <dfn> tag (end tag required)
1023: sub start_dfn {
1024: my ($target,$token) = @_;
1025: my $currentstring = '';
1026: if ($target eq 'web') {
1027: $currentstring .= $token->[4];
1028: } elsif ($target eq 'tex') {
1029: $currentstring .= '\textit{';
1030: }
1031: return $currentstring;
1032: }
1033:
1034: sub end_dfn {
1035: my ($target,$token) = @_;
1036: my $currentstring = '';
1037: if ($target eq 'web') {
1038: $currentstring .= $token->[2];
1039: } elsif ($target eq 'tex') {
1040: $currentstring .= '}';
1041: }
1042: return $currentstring;
1043: }
1044:
1045: #-- <tt> tag (end tag required)
1046: sub start_tt {
1047: my ($target,$token) = @_;
1048: my $currentstring = '';
1049: if ($target eq 'web') {
1050: $currentstring .= $token->[4];
1051: } elsif ($target eq 'tex') {
1052: $currentstring .= '\texttt{';
1053: }
1054: return $currentstring;
1055: }
1056:
1057: sub end_tt {
1058: my ($target,$token) = @_;
1059: my $currentstring = '';
1060: if ($target eq 'web') {
1061: $currentstring .= $token->[2];
1062: } elsif ($target eq 'tex') {
1063: $currentstring .= '}';
1064: }
1065: return $currentstring;
1066: }
1067:
1068: #-- <kbd> tag (end tag required)
1069: sub start_kbd {
1070: my ($target,$token) = @_;
1071: my $currentstring = '';
1072: if ($target eq 'web') {
1073: $currentstring .= $token->[4];
1074: } elsif ($target eq 'tex') {
1075: $currentstring .= '\texttt{';
1076: }
1077: return $currentstring;
1078: }
1079:
1080: sub end_kbd {
1081: my ($target,$token) = @_;
1082: my $currentstring = '';
1083: if ($target eq 'web') {
1084: $currentstring .= $token->[2];
1085: } elsif ($target eq 'tex') {
1086: $currentstring .= '}';
1087: }
1088: return $currentstring;
1089: }
1090:
1091: #-- <code> tag (end tag required)
1092: sub start_code {
1093: my ($target,$token) = @_;
1094: my $currentstring = '';
1095: if ($target eq 'web') {
1096: $currentstring .= $token->[4];
1097: } elsif ($target eq 'tex') {
1098: $currentstring .= '\texttt{';
1099: }
1100: return $currentstring;
1101: }
1102:
1103: sub end_code {
1104: my ($target,$token) = @_;
1105: my $currentstring = '';
1106: if ($target eq 'web') {
1107: $currentstring .= $token->[2];
1108: } elsif ($target eq 'tex') {
1109: $currentstring .= '}';
1110: }
1111: return $currentstring;
1112: }
1113:
1114: #-- <em> tag (end tag required)
1115: sub start_em {
1116: my ($target,$token) = @_;
1117: my $currentstring = '';
1118: if ($target eq 'web') {
1119: $currentstring .= $token->[4];
1120: } elsif ($target eq 'tex') {
1121: $currentstring .= '\emph{';
1122: }
1123: return $currentstring;
1124: }
1125:
1126: sub end_em {
1127: my ($target,$token) = @_;
1128: my $currentstring = '';
1129: if ($target eq 'web') {
1130: $currentstring .= $token->[2];
1131: } elsif ($target eq 'tex') {
1132: $currentstring .= '}';
1133: }
1134: return $currentstring;
1135: }
1136:
1137: #-- <q> tag (end tag required)
1138: sub start_q {
1139: my ($target,$token) = @_;
1140: my $currentstring = '';
1141: if ($target eq 'web') {
1142: $currentstring .= $token->[4];
1143: } elsif ($target eq 'tex') {
1144: $currentstring .= '\emph{';
1145: }
1146: return $currentstring;
1147: }
1148:
1149: sub end_q {
1150: my ($target,$token) = @_;
1151: my $currentstring = '';
1152: if ($target eq 'web') {
1153: $currentstring .= $token->[2];
1154: } elsif ($target eq 'tex') {
1155: $currentstring .= '}';
1156: }
1157: return $currentstring;
1158: }
1159:
1160: # <p> is a bit strange since it does not require a closing </p>
1161: # However in latex, we must often output closing stuff to end
1162: # environments and {}'s etc. Therefore we do all the work
1163: # of figuring out the ending strings in the start tag processing,
1164: # and provide a mechanism to output the stop text external
1165: # to tag processing.
1166: #
1167: {
1168:
1169: my $closing_string = ''; # String required to close <p>
1170:
1171: # Some tags are <p> fragile meaning that <p> inside of them
1172: # does not work within TeX mode. This is managed via the
1173: # counter below:
1174: #
1175:
1176: my $para_disabled = 0;
1177:
1178: sub disable_para {
1179: $para_disabled++;
1180: }
1181: sub enable_para {
1182: $para_disabled--;
1183: }
1184:
1185:
1186: #-- <p> tag (end tag optional)
1187: #optional attribute - align="center|left|right"
1188: sub start_p {
1189: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1190: my $currentstring = '';
1191: if ($target eq 'web') {
1192: $currentstring .= &end_p(); # close off prior para if in progress.
1193: $currentstring .= $token->[4];
1194: if (! ($currentstring =~ /\//)) {
1195: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1196: }
1197: } elsif ($target eq 'tex' && !$para_disabled) {
1198:
1199: $currentstring .= &end_p(); # close off prior para if in progress.
1200: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1201: if ($align eq 'center') {
1202: $currentstring .='\begin{center}\par';
1203: $closing_string = '\end{center}';
1204: if (&is_inside_of($tagstack, "table")) {
1205: $currentstring = ¢er_correction().$currentstring;
1206: }
1207: } elsif ($align eq 'right') {
1208: $currentstring.="\n".'{\flushright ';
1209: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1210: $closing_string= "}\n";
1211: } elsif ($align eq 'left') {
1212: $currentstring.= "\n".'{\flushleft ';
1213: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1214: $closing_string = "}\n";
1215: } else {
1216: $currentstring.='\par ';
1217: if (&is_inside_of($tagstack, 'table')) {
1218: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1219: } else {
1220: $closing_string = '\strut\\\\\strut ';
1221: }
1222: }
1223:
1224: }
1225: return $currentstring;
1226: }
1227: #
1228: # End paragraph processing just requires that we output the
1229: # closing string that was saved and blank it.
1230: sub end_p {
1231: # Note only 'tex' mode uses disable_para and enable_para
1232: # so we don't need to know the target in the check below:
1233:
1234: if (!$para_disabled) {
1235: my $current_string = $closing_string;
1236: $closing_string = ''; # Not in a para anymore.
1237: return $current_string;
1238: } else {
1239: return '';
1240: }
1241:
1242: }
1243: }
1244: #-- <br> tag (end tag forbidden)
1245: sub start_br {
1246: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1247: my $currentstring = '';
1248: if ($target eq 'web') {
1249: $currentstring .= $token->[4];
1250: } elsif ($target eq 'tex') {
1251: my @tempo=@$tagstack;
1252: my $signal=0;
1253: # Not going to factor this to is_inside_of since that would require
1254: # multiple stack traversals.
1255: #
1256: for (my $i=$#tempo;$i>=0;$i--) {
1257: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1258: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
1259: ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1260: $signal=1;
1261: last;
1262: }
1263: }
1264: if ($signal) {
1265: $currentstring .= ' \vskip 0 mm ';
1266: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1267: $currentstring .= '\strut \\\\ \strut ';
1268: }
1269: }
1270: return $currentstring;
1271: }
1272:
1273: sub end_br {
1274: my ($target,$token) = @_;
1275: my $currentstring = '';
1276: if ($target eq 'web') {
1277: $currentstring .= $token->[2];
1278: }
1279: return $currentstring;
1280: }
1281:
1282: #-- <big> tag (end tag required)
1283: sub start_big {
1284: my ($target,$token) = @_;
1285: my $currentstring = '';
1286: if ($target eq 'web') {
1287: $currentstring .= $token->[4];
1288: } elsif ($target eq 'tex') {
1289: $currentstring .= '{\large ';
1290: }
1291: return $currentstring;
1292: }
1293:
1294: sub end_big {
1295: my ($target,$token) = @_;
1296: my $currentstring = '';
1297: if ($target eq 'web') {
1298: $currentstring .= $token->[2];
1299: } elsif ($target eq 'tex') {
1300: $currentstring .= '}';
1301: }
1302: return $currentstring;
1303: }
1304:
1305: #-- <small> tag (end tag required)
1306: sub start_small {
1307: my ($target,$token) = @_;
1308: my $currentstring = '';
1309: if ($target eq 'web') {
1310: $currentstring .= $token->[4];
1311: } elsif ($target eq 'tex') {
1312: $currentstring .= '{\footnotesize ';
1313: }
1314: return $currentstring;
1315: }
1316:
1317: sub end_small {
1318: my ($target,$token) = @_;
1319: my $currentstring = '';
1320: if ($target eq 'web') {
1321: $currentstring .= $token->[2];
1322: } elsif ($target eq 'tex') {
1323: $currentstring .= '}';
1324: }
1325: return $currentstring;
1326: }
1327:
1328: #-- <basefont> tag (end tag forbidden)
1329: sub start_basefont {
1330: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1331: my $currentstring = '';
1332: if ($target eq 'web') {
1333: $currentstring = $token->[4];
1334: } elsif ($target eq 'tex') {
1335: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1336: if (defined $basesize) {
1337: $currentstring = '{\\'.$basesize.' ';
1338: }
1339: }
1340: return $currentstring;
1341: }
1342:
1343: sub end_basefont {
1344: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1345: my $currentstring = '';
1346: if ($target eq 'web') {
1347: $currentstring = $token->[4];
1348: } elsif ($target eq 'tex') {
1349: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1350: if (defined $basesize) {
1351: $currentstring = '}';
1352: }
1353: }
1354: return $currentstring;
1355: }
1356:
1357: #-- <font> tag (end tag required)
1358: sub start_font {
1359: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1360: my $currentstring = '';
1361: if ($target eq 'web') {
1362: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1363: if ($face!~/symbol/i) {
1364: if (($env{'browser.fontenhance'} eq 'on') ||
1365: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1366: }
1367: $currentstring = $token->[4];
1368: } elsif ($target eq 'tex') {
1369: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1370: if (defined $fontsize) {
1371: $currentstring = '{\\'.$fontsize.' ';
1372: }
1373: }
1374: return $currentstring;
1375: }
1376:
1377: sub end_font {
1378: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1379: my $currentstring = '';
1380: if ($target eq 'web') {
1381: $currentstring = $token->[2];
1382: } elsif ($target eq 'tex') {
1383: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1384: if (defined $fontsize) {
1385: $currentstring = '}';
1386: }
1387: }
1388: return $currentstring;
1389: }
1390:
1391: #-- <strike> tag (end tag required)
1392: sub start_strike {
1393: my ($target,$token) = @_;
1394: my $currentstring = '';
1395: if ($target eq 'web') {
1396: $currentstring .= $token->[4];
1397: } elsif ($target eq 'tex') {
1398: &Apache::lonxml::startredirection();
1399: }
1400: return $currentstring;
1401: }
1402:
1403: sub end_strike {
1404: my ($target,$token) = @_;
1405: my $currentstring = '';
1406: if ($target eq 'web') {
1407: $currentstring .= $token->[2];
1408: } elsif ($target eq 'tex') {
1409: $currentstring=&Apache::lonxml::endredirection();
1410: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1411: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1412: $currentstring=~s/(\S)\s*$/$1\}/;
1413: }
1414: return $currentstring;
1415: }
1416:
1417: #-- <s> tag (end tag required)
1418: sub start_s {
1419: my ($target,$token) = @_;
1420: my $currentstring = '';
1421: if ($target eq 'web') {
1422: $currentstring .= $token->[4];
1423: } elsif ($target eq 'tex') {
1424: &Apache::lonxml::startredirection();
1425: }
1426: return $currentstring;
1427: }
1428:
1429: sub end_s {
1430: my ($target,$token) = @_;
1431: my $currentstring = '';
1432: if ($target eq 'web') {
1433: $currentstring .= $token->[2];
1434: } elsif ($target eq 'tex') {
1435: $currentstring=&Apache::lonxml::endredirection();
1436: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1437: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1438: $currentstring=~s/(\S)\s*$/$1\}/;
1439: }
1440: return $currentstring;
1441: }
1442:
1443: #-- <sub> tag (end tag required)
1444: sub start_sub {
1445: my ($target,$token) = @_;
1446: my $currentstring = '';
1447: if ($target eq 'web') {
1448: $currentstring .= $token->[4];
1449: } elsif ($target eq 'tex') {
1450: $currentstring .= '\ensuremath{_{';
1451: }
1452: return $currentstring;
1453: }
1454:
1455: sub end_sub {
1456: my ($target,$token) = @_;
1457: my $currentstring = '';
1458: if ($target eq 'web') {
1459: $currentstring .= $token->[2];
1460: } elsif ($target eq 'tex') {
1461: $currentstring .= '}}';
1462: }
1463: return $currentstring;
1464: }
1465:
1466: #-- <sup> tag (end tag required)
1467: sub start_sup {
1468: my ($target,$token) = @_;
1469: my $currentstring = '';
1470: if ($target eq 'web') {
1471: $currentstring .= $token->[4];
1472: } elsif ($target eq 'tex') {
1473: $currentstring .= '\ensuremath{^{';
1474: }
1475: return $currentstring;
1476: }
1477:
1478: sub end_sup {
1479: my ($target,$token) = @_;
1480: my $currentstring = '';
1481: if ($target eq 'web') {
1482: $currentstring .= $token->[2];
1483: } elsif ($target eq 'tex') {
1484: $currentstring .= '}}';
1485: }
1486: return $currentstring;
1487: }
1488:
1489: #-- <hr> tag (end tag forbidden)
1490: sub start_hr {
1491: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1492: my $currentstring = &end_p(); # End enclosing para.
1493: if ($target eq 'web') {
1494: $currentstring .= $token->[4];
1495: } elsif ($target eq 'tex') {
1496: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1497: if (defined $LaTeXwidth) {
1498: if ($LaTeXwidth=~/^%/) {
1499: substr($LaTeXwidth,0,1)='';
1500: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1501: }
1502: } else {
1503: $LaTeXwidth ='0.9\textwidth';
1504: }
1505: my ($pre,$post);
1506: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1507: if (($align eq 'center') || (not defined $align)) {
1508: $pre=''; $post='';
1509: } elsif ($align eq 'left') {
1510: $pre='\rlap{'; $post='} \hfill';
1511: } elsif ($align eq 'right') {
1512: $pre=' \hfill \llap{'; $post='}';
1513: }
1514: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1515: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1516: }
1517: return $currentstring;
1518: }
1519:
1520: sub end_hr {
1521: my ($target,$token) = @_;
1522: my $currentstring = '';
1523: if ($target eq 'web') {
1524: $currentstring .= $token->[2];
1525: }
1526: return $currentstring;
1527: }
1528:
1529: #-- <div> tag (end tag required)
1530: {
1531:
1532: # Since div can be nested, the stack below is used
1533: # in 'tex' mode to store the ending strings
1534: # for the div stack.
1535:
1536: my @div_end_stack;
1537:
1538: sub start_div {
1539: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1540: my $currentstring = &end_p(); # Close enclosing para.
1541: if ($target eq 'web') {
1542: $currentstring .= $token->[4];
1543: }
1544: if ($target eq 'tex') {
1545: # 4 possible alignments: left, right, center, and -missing-.
1546:
1547: my $endstring = '';
1548:
1549: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1550: $safeeval, undef, 1));
1551: if ($align eq 'center') {
1552: $currentstring .= '\begin{center}';
1553: $endstring = '\end{center}';
1554: if (&is_inside_of($tagstack, "table")) {
1555: $currentstring = ¢er_correction().$currentstring;
1556: }
1557: }
1558: elsif ($align eq 'right') {
1559: $currentstring .= '\begin{flushright}';
1560: $endstring .= '\end{flushright}';
1561: } elsif ($align eq 'left') {
1562: $currentstring .= '\begin{flushleft}';
1563: $endstring = '\end{flushleft}';
1564: } else {
1565:
1566: }
1567: $currentstring .= "\n"; # For human readability.
1568: $endstring = "\n$endstring\n"; # For human readability
1569: push(@div_end_stack, $endstring);
1570: }
1571: return $currentstring;
1572: }
1573:
1574: sub end_div {
1575: my ($target,$token) = @_;
1576: my $currentstring = '';
1577: if ($target eq 'web') {
1578: $currentstring .= $token->[2];
1579: }
1580: if ($target eq 'tex') {
1581: my $endstring = pop @div_end_stack;
1582: $currentstring .= $endstring;
1583: }
1584: return $currentstring;
1585: }
1586: }
1587:
1588: #-- <a> tag (end tag required)
1589: sub start_a {
1590: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1591: my $currentstring = '';
1592: if ($target eq 'web') {
1593: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1594: undef,1);
1595: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1596: } elsif ($target eq 'tex') {
1597: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1598: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1599: if ($a=~/\S/) {
1600: $a=~s/([^\\])%/$1\\\%/g;
1601: $currentstring .= '\ref{URI: '.$a.'}';
1602: } elsif ($b=~/\S/) {
1603: $currentstring .= '\ref{Anchor: '.$b.'}';
1604: } else {
1605: $currentstring.='';
1606: }
1607: }
1608: return $currentstring;
1609: }
1610:
1611: sub end_a {
1612: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1613: my $currentstring = '';
1614: if ($target eq 'web') {
1615: $currentstring .= $token->[2];
1616: }
1617: return $currentstring;
1618: }
1619:
1620: #-- <li> tag (end tag optional)
1621: sub start_li {
1622: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1623: my $currentstring = '';
1624: if ($target eq 'web') {
1625: $currentstring = $token->[4];
1626: } elsif ($target eq 'tex') {
1627: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1628: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1629: #FIXME need to support types i and I
1630: if ($type=~/disc/) {
1631: $currentstring .= ' \item[$\bullet$] ';
1632: } elsif ($type=~/circle/) {
1633: $currentstring .= ' \item[$\circ$] ';
1634: } elsif ($type=~/square/) {
1635: $currentstring .= ' \item[$\diamond$] ';
1636: } elsif ($type eq '1') {
1637: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1638: } elsif ($type eq 'A') {
1639: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1640: } elsif ($type eq 'a') {
1641: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1642: } elsif ($value ne '') {
1643: $currentstring .= ' \item['.$value.'] ';
1644: } else {
1645: $currentstring .= ' \item ';
1646: }
1647: $Apache::londefdef::list_index++;
1648: }
1649: return $currentstring;
1650: }
1651:
1652: sub end_li {
1653: my ($target,$token) = @_;
1654: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1655: if ($target eq 'web') {
1656: $currentstring .= $token->[2];
1657: }
1658: return $currentstring;
1659: }
1660:
1661: #-- <u> tag (end tag required)
1662: sub start_u {
1663: my ($target,$token) = @_;
1664: my $currentstring = '';
1665: if ($target eq 'web') {
1666: $currentstring .= $token->[4];
1667: } elsif ($target eq 'tex') {
1668: &Apache::lonxml::startredirection();
1669: }
1670: return $currentstring;
1671: }
1672:
1673: sub end_u {
1674: my ($target,$token) = @_;
1675: my $currentstring = '';
1676: if ($target eq 'web') {
1677: $currentstring .= $token->[2];
1678: } elsif ($target eq 'tex') {
1679: $currentstring=&Apache::lonxml::endredirection();
1680: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1681: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1682: $currentstring=~s/(\S)\s*$/$1\}/;
1683: }
1684: return $currentstring;
1685: }
1686:
1687: #-- <ul> tag (end tag required)
1688: sub start_ul {
1689: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1690: my $currentstring = &end_p(); # Close off enclosing list.
1691: if ($target eq 'web') {
1692: $currentstring .= $token->[4];
1693: } elsif ($target eq 'tex') {
1694: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1695: $Apache::londefdef::list_index=0;
1696: if ($TeXtype eq 'disc') {
1697: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1698: '\renewcommand{\labelitemii}{$\bullet$}'.
1699: '\renewcommand{\labelitemiii}{$\bullet$}'.
1700: '\renewcommand{\labelitemiv}{$\bullet$}';
1701: } elsif ($TeXtype eq 'circle') {
1702: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1703: '\renewcommand{\labelitemii}{$\circ$}'.
1704: '\renewcommand{\labelitemiii}{$\circ$}'.
1705: '\renewcommand{\labelitemiv}{$\circ$}';
1706: } elsif ($TeXtype eq 'square') {
1707: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1708: '\renewcommand{\labelitemii}{$\diamond$}'.
1709: '\renewcommand{\labelitemiii}{$\diamond$}'.
1710: '\renewcommand{\labelitemiv}{$\diamond$}';
1711: }
1712: $currentstring .= '\strut \begin{itemize}';
1713: }
1714: return $currentstring;
1715: }
1716:
1717: sub end_ul {
1718: my ($target,$token) = @_;
1719: my $currentstring = '';
1720: if ($target eq 'web') {
1721: $currentstring = $token->[2];
1722: } elsif ($target eq 'tex') {
1723: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1724: '\renewcommand{\labelitemii}{$\bullet$}'.
1725: '\renewcommand{\labelitemiii}{$\bullet$}'.
1726: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1727: }
1728: return $currentstring;
1729: }
1730:
1731: #-- <menu> tag (end tag required)
1732: sub start_menu {
1733: my ($target,$token) = @_;
1734: my $currentstring = '';
1735: if ($target eq 'web') {
1736: $currentstring = $token->[4];
1737: } elsif ($target eq 'tex') {
1738: $currentstring = " \\begin{itemize} ";
1739: }
1740: return $currentstring;
1741: }
1742:
1743: sub end_menu {
1744: my ($target,$token) = @_;
1745: my $currentstring = '';
1746: if ($target eq 'web') {
1747: $currentstring = $token->[2];
1748: } elsif ($target eq 'tex') {
1749: $currentstring = " \\end{itemize}";
1750: }
1751: return $currentstring;
1752: }
1753:
1754: #-- <dir> tag (end tag required)
1755: sub start_dir {
1756: my ($target,$token) = @_;
1757: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1758: if ($target eq 'web') {
1759: $currentstring .= $token->[4];
1760: } elsif ($target eq 'tex') {
1761: $currentstring .= " \\begin{itemize} ";
1762: }
1763: return $currentstring;
1764: }
1765:
1766: sub end_dir {
1767: my ($target,$token) = @_;
1768: my $currentstring = '';
1769: if ($target eq 'web') {
1770: $currentstring = $token->[2];
1771: } elsif ($target eq 'tex') {
1772: $currentstring = " \\end{itemize}";
1773: }
1774: return $currentstring;
1775: }
1776:
1777: #-- <ol> tag (end tag required)
1778: sub start_ol {
1779: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1780: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1781: if ($target eq 'web') {
1782: $currentstring .= $token->[4];
1783: } elsif ($target eq 'tex') {
1784: $Apache::londefdef::list_index=0;
1785: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1786: if ($type eq '1') {
1787: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1788: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1789: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1790: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1791: } elsif ($type eq 'A') {
1792: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1793: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1794: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1795: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1796: } elsif ($type eq 'a') {
1797: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1798: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1799: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1800: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1801: } elsif ($type eq 'i') {
1802: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1803: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1804: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1805: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1806: } elsif ($type eq 'I') {
1807: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1808: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1809: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1810: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1811: }
1812: $currentstring .= '\strut \begin{enumerate}';
1813: }
1814: return $currentstring;
1815: }
1816:
1817: sub end_ol {
1818: my ($target,$token) = @_;
1819: my $currentstring = '';
1820: if ($target eq 'web') {
1821: $currentstring = $token->[2];
1822: } elsif ($target eq 'tex') {
1823: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1824: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1825: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1826: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1827: }
1828: return $currentstring;
1829: }
1830:
1831: #-- <dl> tag (end tag required)
1832: sub start_dl {
1833: my ($target,$token) = @_;
1834: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1835: if ($target eq 'web') {
1836: $currentstring .= $token->[4];
1837: } elsif ($target eq 'tex') {
1838: $currentstring .= '\begin{description}';
1839: $Apache::londefdef::DL++;
1840: push(@Apache::londefdef::description,[]);
1841: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1842: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1843: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1844: }
1845: return $currentstring;
1846: }
1847:
1848: sub end_dl {
1849: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1850: my $currentstring = '';
1851: if ($target eq 'web') {
1852: $currentstring = $token->[2];
1853: } elsif ($target eq 'tex') {
1854: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1855: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1856: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1857: $currentstring.=' '.$element.' ';
1858: }
1859: pop(@Apache::londefdef::description);
1860: $currentstring.='\end{description}';
1861: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1862: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1863: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1864: $Apache::londefdef::DL--;
1865: }
1866: return $currentstring;
1867: }
1868:
1869: #-- <dt> tag (end tag optional)
1870: sub start_dt {
1871: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1872: my $currentstring='';
1873: if ($target eq 'web') {
1874: $currentstring = $token->[4];
1875: } elsif ($target eq 'tex') {
1876: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1877: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1878: &Apache::lonxml::startredirection();
1879: $Apache::londefdef::DT[-1]++;
1880: $Apache::londefdef::seenDT[-1]=1;
1881: }
1882: return $currentstring;
1883: }
1884:
1885: sub end_dt {
1886: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1887: my $currentstring = '';
1888: if ($target eq 'web') {
1889: $currentstring = $token->[2];
1890: } elsif ($target eq 'tex') {
1891: if ($Apache::londefdef::DT[-1]) {
1892: my $data=&item_cleanup();
1893: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1894: $Apache::londefdef::DT[-1]--;
1895: }
1896: }
1897: return $currentstring;
1898: }
1899:
1900: sub item_cleanup {
1901: my $item=&Apache::lonxml::endredirection();
1902: $item=~s/\\begin{center}//g;
1903: $item=~s/\\end{center}//g;
1904: return $item;
1905: }
1906:
1907: #-- <dd> tag (end tag optional)
1908: sub start_dd {
1909: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1910: my $currentstring = '';
1911: if ($target eq 'web') {
1912: $currentstring = $token->[4];
1913: } elsif ($target eq 'tex') {
1914: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1915: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1916: if (!$Apache::londefdef::seenDT[-1]) {
1917: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1918: }
1919: push(@{$Apache::londefdef::description[-1]},'');
1920: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1921: $Apache::londefdef::DD[-1]++;
1922: &Apache::lonxml::startredirection();
1923: }
1924: return $currentstring;
1925: }
1926:
1927: sub end_dd {
1928: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1929: my $currentstring = '';
1930: if ($target eq 'web') {
1931: $currentstring = $token->[2];
1932: } elsif ($target eq 'tex') {
1933: $Apache::londefdef::description[-1]->[-1].=
1934: &Apache::lonxml::endredirection().' \vskip 0mm ';
1935: $Apache::londefdef::DD[-1]--;
1936: }
1937: return $currentstring;
1938: }
1939:
1940: #-- <table> tag (end tag required)
1941: # <table> also ends any prior <p> that is not closed.
1942: # but, unless I allow <p>'s to nest, that's the
1943: # only way I could think of to allow <p> in
1944: # <tr> <th> bodies
1945: #
1946: #list of supported attributes: border,width,TeXwidth
1947: sub start_table {
1948: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1949: my $textwidth = '';
1950: my $currentstring = &end_p();
1951: if ($target eq 'web') {
1952: $currentstring .= $token->[4];
1953: } elsif ($target eq 'tex') {
1954: my $aa = {};
1955: push @Apache::londefdef::table, $aa;
1956: $Apache::londefdef::table[-1]{'row_number'} = -1;
1957: #maximum table's width (default coincides with text line length)
1958: if ($#Apache::londefdef::table==0) {
1959: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1960: $textwidth=~/(\d+\.?\d*)/;
1961: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1962: } else {
1963: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1964: #the maximum width of nested table is determined by LATeX width of parent cell
1965: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1966: } else {
1967: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1968: $textwidth=$Apache::londefdef::table[-2]{'width'};
1969: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1970: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1971: }
1972: }
1973: }
1974:
1975: # width either comes forced from the TeXwidth or the width parameters.
1976: # in either case it can be a percentage or absolute width.
1977: # in the width case we ignore absolute width
1978: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1979: if (!defined($TeXwidth)) {
1980: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1981: $safeeval,undef,1);
1982: if ($htmlwidth =~ /%/) {
1983: $TeXwidth = $htmlwidth;
1984: } else {
1985: $TeXwidth = $textwidth;
1986: }
1987: } else {
1988: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1989: }
1990: if ($TeXwidth=~/%/) {
1991: $Apache::londefdef::table[-1]{'percent'}=1;
1992: $TeXwidth=~/(\d+)/;
1993: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1994: } else {
1995: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1996: }
1997: # In the end, however the table width cannot be wider than $textwidth...
1998:
1999: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
2000: $Apache::londefdef::table[-1]{'width'} = $textwidth;
2001: }
2002:
2003: #table's border
2004: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
2005: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2006: unless (defined $border) { $border = 0; }
2007: if ($border) {
2008: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
2009: $Apache::londefdef::table[-1]{'vinc'} = '&';
2010: $Apache::londefdef::table[-1]{'vvinc'} = '|';
2011: } else {
2012: $Apache::londefdef::table[-1]{'hinc'} = '';
2013: $Apache::londefdef::table[-1]{'vinc'} = '&';
2014: $Apache::londefdef::table[-1]{'vvinc'} = '';
2015: }
2016: if ($#Apache::londefdef::table==0) {
2017: # Note that \newline seems to destroy the alignment envs.
2018: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
2019: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
2020: }
2021: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
2022: $Apache::londefdef::table[-1]{'TeXlen'}=[];
2023: $Apache::londefdef::table[-1]{'objectlen'}=[];
2024: $Apache::londefdef::table[-1]{'objectsignal'}=[];
2025: $Apache::londefdef::table[-1]{'maxlen'}=[];
2026: $Apache::londefdef::table[-1]{'minlen'}=[];
2027: $Apache::londefdef::table[-1]{'content'}=[];
2028: $Apache::londefdef::table[-1]{'align'}=[];
2029: $currentstring.='\keephidden{NEW TABLE ENTRY}';
2030:
2031:
2032: }
2033: return $currentstring;
2034: }
2035:
2036: sub end_table {
2037: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2038: my $currentstring = '';
2039: if ($target eq 'web') {
2040: $currentstring = $token->[2];
2041: } elsif ($target eq 'tex') {
2042: my $inmemory = '';
2043: my $output = '';
2044: my $WARNING='';
2045: #width of columns from TeXwidth attributes
2046:
2047: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2048: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2049: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2050: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2051: }
2052: }
2053: }
2054: #free space and number of empty columns
2055: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2056: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2057: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2058: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2059: $empty_columns++;
2060: } else {
2061: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2062: }
2063: }
2064: #boundaries for contents columns
2065: my @min_len=();#columns can not be narrower
2066: my @max_len=();#maximum length of column
2067: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2068: my ($localmin,$localmax)=(0,0);
2069: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2070: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2071: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2072: }
2073: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2074: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2075: }
2076: }
2077: push @min_len, $localmin;
2078: push @max_len, $localmax;
2079: }
2080: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2081: my $localmin=0,;
2082: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2083: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2084: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2085: }
2086: }
2087: if ($max_len[$jn]<$localmin) {
2088: $max_len[$jn]=$localmin;
2089: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2090: }#object size is bigger
2091: if ($min_len[$jn]<$localmin) {
2092: $min_len[$jn]=$localmin;
2093: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2094: }#object size is bigger
2095: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2096: $min_len[$jn]=0;
2097: $max_len[$jn]=0;
2098: }
2099: }
2100: #final adjustment of column width
2101: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2102: my @adjust=();
2103: #step 1. adjustment by maximum value
2104: my $space_neeeded=0;
2105: for (my $jn=0;$jn<=$#max_len;$jn++) {
2106: $space_neeeded=$space_neeeded+$max_len[$jn];
2107: }
2108: if ($space_neeeded<=$available_space) {
2109: for (my $jn=0;$jn<=$#max_len;$jn++) {
2110: if ($fwidth[$jn]==0) {
2111: $fwidth[$jn]=$max_len[$jn];
2112: }
2113: }
2114: } else {
2115: #step 2. adjustment by minimum value (estimation)
2116: $space_neeeded=0;
2117: for (my $jn=0;$jn<=$#min_len;$jn++) {
2118: $space_neeeded+=$min_len[$jn];
2119: }
2120: if ($space_neeeded>$available_space) {
2121: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2122: for (my $jn=0;$jn<=$#max_len;$jn++) {
2123: if ($fwidth[$jn]==0) {
2124: $fwidth[$jn]=$min_len[$jn];
2125: }
2126: }
2127: #check if we have objects which can be scaled
2128: my $how_many_to_scale=0;
2129: my @to_scale=();
2130: for (my $jn=0;$jn<=$#max_len;$jn++) {
2131: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2132: $how_many_to_scale++;
2133: push @to_scale, $jn;
2134: }
2135: }
2136: if ($how_many_to_scale>0) {
2137: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2138: foreach my $jn (@to_scale) {
2139: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2140: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2141: if ($1 ne '') {
2142: my $current_length=&recalc($1);
2143: $current_length=~/(\d+\.?\d*)/;
2144: $current_length=$current_length-$space_to_adjust;
2145: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2146: }
2147: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2148: if ($1 ne '') {
2149: my $current_length=$1;
2150: $current_length=$current_length-$space_to_adjust;
2151: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2152: }
2153: }
2154: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2155: }
2156: }
2157: } else {
2158: #step 3. adjustment over minimal + corrections
2159: my $enlarge_coef=$available_space/$space_neeeded;
2160: my $acsessive=0;
2161: for (my $jn=0;$jn<=$#min_len;$jn++) {
2162: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2163: if ($adjust[$jn]>$max_len[$jn]) {
2164: $fwidth[$jn]=$max_len[$jn];
2165: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2166: $adjust[$jn]=0;
2167: }
2168: }
2169: if ($acsessive>0) {
2170: #we have an excess of space and can redistribute it
2171: my $notempty_columns=0;
2172: for (my $jn=0;$jn<=$#min_len;$jn++) {
2173: if ($adjust[$jn]!=0) {
2174: $notempty_columns++;
2175: }
2176: }
2177: my $per_column=$acsessive/$notempty_columns;
2178: for (my $jn=0;$jn<=$#min_len;$jn++) {
2179: if ($adjust[$jn]!=0) {
2180: $adjust[$jn]+=$per_column;
2181: $fwidth[$jn]=$adjust[$jn];
2182: }
2183: }
2184: } else {
2185: for (my $jn=0;$jn<=$#min_len;$jn++) {
2186: $fwidth[$jn]=$adjust[$jn];
2187: }
2188: }
2189: }
2190: }
2191: #use all available width if it is defined in % or as TeXwidth
2192: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2193: my $current=0;
2194: for (my $i=0;$i<=$#fwidth;$i++) {
2195: $current+=$fwidth[$i];
2196: }
2197: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2198: for (my $i=0;$i<=$#fwidth;$i++) {
2199: $fwidth[$i]*=$coef;
2200: }
2201: }
2202: #removing of empty columns if allowed
2203: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2204: if ($permission eq 'yes') {
2205: my @cleaned_table=();
2206: my @cleaned_header=();
2207: my $colind=0;
2208: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2209: if ($fwidth[$jn]!=0) {
2210: #we need to copy column
2211: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2212: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2213: $cleaned_header[$colind]=$fwidth[$jn];
2214: }
2215: $colind++;
2216: }
2217: }
2218: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2219: @fwidth=@cleaned_header;
2220: }
2221: #construct header of the table
2222: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2223: for (my $in=0;$in<=$#fwidth;$in++) {
2224: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2225: }
2226: $header_of_table .= '}';
2227: #fill the table
2228: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2229: my $have_rowspan = 0;
2230: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2231:
2232: #-----------------------------------------------------------
2233: # I think this order of doing things will ensure that
2234: # single rowspan, columspan and combined row/colspans will
2235: # work correctly. LaTeX is delicate here.
2236: # RF.
2237:
2238: # Start a rowspan if necessary:
2239:
2240: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2241: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2242: #
2243: # Do the appropriate magic if this has a colspan
2244: #
2245:
2246: if ($colspan > 1) {
2247: $output .= '\multicolumn{'.
2248: $colspan
2249: .'}{|l|}{';
2250: }
2251:
2252: if ($rowspan > 1) {
2253: $have_rowspan++;
2254: $output .= '\multirow{'.$rowspan.'}[0]{'.$fwidth[$jn].'mm}{';
2255: }
2256: if (($rowspan eq '^') || ($rowspan eq '_')) {
2257: $have_rowspan++;
2258: }
2259: #--------------------------------------------------------------
2260:
2261: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2262: $output.=¢er_correction().'\begin{center}';
2263: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2264: $output.=' \hfill \llap{'
2265: }
2266: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2267: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2268: $output.='\end{center}';
2269: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2270: $output.='} ';
2271: }
2272: # Close off any open multirow:
2273:
2274: if ($rowspan > 1) {
2275: $output .= '}';
2276: }
2277: # Close off the colspan...
2278: #
2279: if ($colspan > 1) {
2280: $output .= '}';
2281: $jn += $colspan-1; # Adjust for number of rows really left.
2282: }
2283: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2284: }
2285: # If have_rowspan > 0, and borders are on, then
2286: # we need to do more than put an \hline at the bottom of row.
2287: # we need to do the appropriate \cline to ensure that
2288: # the spanned rows don't have \hlines through them.
2289:
2290: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2291: $output .= ' \\\\ ';
2292: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2293: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2294: if ($rowspan ne "^") {
2295: if (($rowspan <= 1) || ($rowspan eq '_')) {
2296: my $column = $jn+1;
2297: $output .= '\cline{'.$column.'-'.$column.'} ';
2298: }
2299: }
2300: }
2301:
2302: } else {
2303: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2304: }
2305: }
2306: # Note that \newline destroys alignment env's produced by e.g. <div>
2307: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2308: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2309: if ($#Apache::londefdef::table > 0) {
2310: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2311: # Figure out max/and min width by summing us and then
2312: # apply that to the current column of the table we nest in
2313: # if it's larger than the current width or the current width
2314: # is undefined.
2315: #
2316: my $min_nested_width = 0;
2317: my $max_nested_width = 0;
2318: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2319: $min_nested_width += $min_len[$col];
2320: $max_nested_width += $max_len[$col];
2321:
2322: }
2323: # Fudge in an extra 5 mm for borders etc:
2324:
2325: $min_nested_width += 5;
2326: $max_nested_width += 5;
2327:
2328: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2329: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2330: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2331: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2332: }
2333: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2334: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2335: }
2336:
2337: pop @Apache::londefdef::table;
2338: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2339: } else {
2340: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2341: pop @Apache::londefdef::table;
2342: undef @Apache::londefdef::table;
2343: }
2344: }
2345: return $currentstring;
2346: }
2347:
2348: #-- <tr> tag (end tag optional)
2349: sub start_tr {
2350: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2351: my $currentstring = '';
2352: if ($target eq 'web') {
2353: $currentstring = $token->[4];
2354: } elsif ($target eq 'tex') {
2355: $Apache::londefdef::table[-1]{'row_number'}++;
2356: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2357: if ($alignchar ne '') {
2358: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2359: } else {
2360: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2361: }
2362: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2363: #
2364: # Need to save the number of table columns to preserve the max # columns.
2365: #
2366: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2367: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2368: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2369: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2370: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2371: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2372: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2373: }
2374: return $currentstring;
2375: }
2376:
2377: sub end_tr {
2378: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2379: my $currentstring = &end_p(); # Close any pending <p> in the row.
2380: if ($target eq 'web') {
2381: $currentstring .= $token->[2];
2382: } elsif ($target eq 'tex') {
2383: if ($Apache::londefdef::TD_redirection) {
2384: &end_td_tex($parstack,$parser,$safeeval);
2385: }
2386: # Counter columns must be the maximum number of columns seen
2387: # in the table so far so:
2388: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2389: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2390: }
2391:
2392:
2393:
2394: }
2395: return $currentstring;
2396: }
2397:
2398: #-- <td> tag (end tag optional)
2399: sub start_td {
2400: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2401: my $currentstring = '';
2402: if ($target eq 'web') {
2403: $currentstring = $token->[4];
2404: } elsif ($target eq 'tex') {
2405: $Apache::londefdef::TD_redirection = 1;
2406: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2407: }
2408: return $currentstring;
2409: }
2410:
2411: sub tag_check {
2412: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2413: my @ar=@$parstack;
2414: for (my $i=$#ar-1;$i>=0;$i--) {
2415: if (lc($$tagstack[$i]) eq $good_tag) {
2416: &start_td_tex($parstack,$parser,$safeeval);
2417: last;
2418: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2419: splice @ar, $i+1;
2420: &end_td_tex(\@ar,$parser,$safeeval);
2421: &start_td_tex($parstack,$parser,$safeeval);
2422: last;
2423: }
2424: }
2425: return '';
2426: }
2427:
2428: sub start_td_tex {
2429: my ($parstack,$parser,$safeeval) = @_;
2430: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2431: if ($alignchar eq '') {
2432: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2433: }
2434: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2435: $Apache::londefdef::table[-1]{'counter_columns'}++;
2436: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2437: if (defined $TeXwidth) {
2438: my $current_length=&recalc($TeXwidth);
2439: $current_length=~/(\d+\.?\d*)/;
2440: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2441: }
2442: &Apache::lonxml::startredirection();
2443: return '';
2444: }
2445:
2446: sub end_td_tex {
2447: my ($parstack,$parser,$safeeval) = @_;
2448: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2449: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2450: my $data = &Apache::lonxml::endredirection();
2451:
2452: # The rowspan array of the table indicates which cells are part of a span.
2453: # n indicates the start of a span set of n rows.
2454: # ^ indicates a cell that continues a span set.
2455: # _ indicates the cell is at the bottom of a span set.
2456: # If this and subsequent cells are part of a rowspan, we must
2457: # push along the row until we find one that is not.
2458:
2459: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2460: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2461: # Part of a span.
2462: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2463: $current_column++;
2464: }
2465: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2466:
2467:
2468: # Get the column and row spans.
2469: # Colspan can be done via \multicolumn if I can figure out the data structs.
2470:
2471: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2472: if (!$colspan) {
2473: $colspan = 1;
2474: }
2475:
2476: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2477: if (!$rowspan) {
2478: $rowspan = 1;
2479: }
2480:
2481:
2482:
2483: for (my $c = 0; $c < $colspan; $c++) {
2484: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2485: for (my $i = 1; $i < $rowspan; $i++) {
2486: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2487: if ($i == ($rowspan-1)) {
2488: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2489: }
2490: }
2491: }
2492:
2493: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2494: if (defined $TeXwidth) {
2495: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2496: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2497: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2498: } else {
2499: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2500: my $garbage_data=$data;
2501: my $fwidth=0;
2502: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2503: my $current_length=&recalc($1);
2504: $current_length=~/(\d+\.?\d*)/;
2505: if ($fwidth<$1) {$fwidth=$1;}
2506: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2507: }
2508: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2509: my $current_length=$1;
2510: if ($fwidth<$current_length) {$fwidth=$current_length;}
2511: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2512: }
2513: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2514: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2515: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2516: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2517: } elsif ($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)*/) {
2518: my $garbage_data=$data;
2519: my $fwidth=0;
2520: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2521: my $current_length=&recalc($1);
2522: $current_length=~/(\d+\.?\d*)/;
2523: if ($fwidth<$1) {$fwidth=$1;}
2524: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2525: }
2526: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2527: my $current_length=&recalc($1);
2528: $current_length=~/(\d+\.?\d*)/;
2529: if ($fwidth<$1) {$fwidth=$1;}
2530: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2531: }
2532: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2533: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2534: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2535: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2536: $data=~s/\\\\\s*$//;
2537: } else {
2538: $data=~s/^\s+(\S.*)/$1/;
2539: $data=~s/(.*\S)\s+$/$1/;
2540: $data=~s/(\s)+/$1/;
2541: my ($current_length,$min_length)=(0,0);
2542: if ($data=~/\\vskip/) {
2543: my $newdata=$data;
2544: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2545: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2546: foreach my $elementdata (@newdata) {
2547: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2548: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2549: my @words=split(/ /,$elementdata);
2550: foreach my $word (@words) {
2551: my $lengthword=2.5*&LATEX_length($word);
2552: if ($min_length<$lengthword) {$min_length=$lengthword;}
2553: }
2554: }
2555: } else {
2556: $current_length=2.5*&LATEX_length($data);
2557: my @words=split(/ /,$data);
2558: foreach my $word (@words) {
2559: my $lengthword=2*&LATEX_length($word);
2560: if ($min_length<$lengthword) {$min_length=$lengthword;}
2561: }
2562: }
2563: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2564: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2565: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2566: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2567: }
2568: }
2569: # Substitute all of the tables nested in this cell in their appropriate places.
2570:
2571:
2572: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2573: for (my $in=0; $in<=$nested_count; $in++) {
2574: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2575: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2576: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2577: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2578:
2579: }
2580: # Should be be killing off the 'include' elements as they're used up?
2581:
2582: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2583:
2584:
2585:
2586:
2587: # the colspan array will indicate how many columns will be spanned by this
2588: # cell..this requires that counter_columns also be adjusted accordingly
2589: # so that the next bunch of text goes in the right cell. Note that since
2590: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2591: #
2592:
2593: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2594: for (my $i = 0; $i < ($colspan -1); $i++) {
2595: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2596: }
2597: for (my $r = 0; $r < $rowspan; $r++) {
2598: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2599: # Put empty text in spanned cols.
2600:
2601: }
2602:
2603:
2604:
2605: return '';
2606: }
2607:
2608: sub end_td {
2609: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2610: my $currentstring = '';
2611: if ($target eq 'web') {
2612: $currentstring = $token->[2];
2613: } elsif ($target eq 'tex') {
2614: $Apache::londefdef::TD_redirection =0;
2615: &end_td_tex($parstack,$parser,$safeeval);
2616: }
2617: return $currentstring;
2618: }
2619:
2620: #-- <th> tag (end tag optional)
2621: sub start_th {
2622: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2623: my $currentstring = '';
2624: if ($target eq 'web') {
2625: $currentstring = $token->[4];
2626: } elsif ($target eq 'tex') {
2627: $Apache::londefdef::TD_redirection = 1;
2628: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2629: }
2630: return $currentstring;
2631: }
2632:
2633: sub tagg_check {
2634: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2635: my @ar=@$parstack;
2636: for (my $i=$#ar-1;$i>=0;$i--) {
2637: if (lc($$tagstack[$i]) eq $good_tag) {
2638: &start_th_tex($parstack,$parser,$safeeval);
2639: last;
2640: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2641: splice @ar, $i+1;
2642: &end_th_tex(\@ar,$parser,$safeeval);
2643: &start_th_tex($parstack,$parser,$safeeval);
2644: last;
2645: }
2646: }
2647: return '';
2648: }
2649:
2650: sub start_th_tex {
2651: my ($parstack,$parser,$safeeval) = @_;
2652: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2653: if ($alignchar eq '') {
2654: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2655: }
2656: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2657: $Apache::londefdef::table[-1]{'counter_columns'}++;
2658: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2659: if (defined $TeXwidth) {
2660: my $current_length=&recalc($TeXwidth);
2661: $current_length=~/(\d+\.?\d*)/;
2662: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2663: }
2664: &Apache::lonxml::startredirection();
2665: return '';
2666: }
2667:
2668: sub end_th_tex {
2669: my ($parstack,$parser,$safeeval) = @_;
2670: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2671: my $data=&Apache::lonxml::endredirection();
2672: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2673: if (defined $TeXwidth) {
2674: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2675: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2676: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2677: } else {
2678: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2679: my $garbage_data=$data;
2680: my $fwidth=0;
2681: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2682: my $current_length=&recalc($1);
2683: $current_length=~/(\d+\.?\d*)/;
2684: if ($fwidth<$1) {$fwidth=$1;}
2685: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2686: }
2687: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2688: my $current_length=$1;
2689: if ($fwidth<$current_length) {$fwidth=$current_length;}
2690: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2691: }
2692: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2693: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2694: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2695: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2696: } else {
2697: $data=~s/^\s+(\S.*)/$1/;
2698: $data=~s/(.*\S)\s+$/$1/;
2699: $data=~s/(\s)+/$1/;
2700: my ($current_length,$min_length)=(0,0);
2701: if ($data=~/\\vskip/) {
2702: my $newdata=$data;
2703: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2704: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2705: foreach my $elementdata (@newdata) {
2706: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2707: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2708: my @words=split(/ /,$elementdata);
2709: foreach my $word (@words) {
2710: my $lengthword=2.5*&LATEX_length($word);
2711: if ($min_length<$lengthword) {$min_length=$lengthword;}
2712: }
2713: }
2714: } else {
2715: $current_length=2.5*&LATEX_length($data);
2716: my @words=split(/ /,$data);
2717: foreach my $word (@words) {
2718: my $lengthword=2*&LATEX_length($word);
2719: if ($min_length<$lengthword) {$min_length=$lengthword;}
2720: }
2721: }
2722: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2723: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2724: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2725: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2726: }
2727: }
2728: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2729: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2730: }
2731: #make data bold
2732: $data='\textbf{'.$data.'}';
2733: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2734: return'';
2735: }
2736:
2737: sub end_th {
2738: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2739: my $currentstring = &end_p(); # Close any open <p> in the row.
2740: if ($target eq 'web') {
2741: $currentstring .= $token->[2];
2742: } elsif ($target eq 'tex') {
2743: $Apache::londefdef::TD_redirection =0;
2744: &end_th_tex($parstack,$parser,$safeeval);
2745: }
2746: return $currentstring;
2747: }
2748:
2749: #-- <img> tag (end tag forbidden)
2750: #
2751: # Render the <IMG> tag.
2752: # <IMG> has the following attributes (in addition to the
2753: # standard HTML ones:
2754: # TeXwrap - Governs how the tex target will try to wrap text around
2755: # horizontally aligned images.
2756: # TeXwidth - The width of the image when rendered for print (mm).
2757: # TeXheight - The height of the image when rendered for print (mm)
2758: # (Note there seems to also be support for this as a % of page size)
2759: #
2760: sub start_img {
2761: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2762: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2763: undef,1);
2764: if (not $src and ($target eq 'web' or $target eq 'tex')) {
2765: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2766: return '';
2767: }
2768: &Apache::lonxml::extlink($src);
2769: my $currentstring = '';
2770: my $scaling = .3;
2771:
2772: # Render unto browsers that which are the browser's...
2773:
2774: if ($target eq 'web') {
2775: if ($env{'browser.imagesuppress'} ne 'on') {
2776: my $enc = ('yes' eq
2777: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2778: $safeeval)));
2779: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2780: $enc);
2781: } else {
2782: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2783: undef,1);
2784: if (!$alttag) {
2785: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2786: $src);
2787: }
2788: $currentstring.='[IMAGE: '.$alttag.']';
2789: }
2790:
2791: # and render unto TeX that which is LaTeX
2792:
2793: } elsif ($target eq 'tex') {
2794: #
2795: # The alignment will require some superstructure to be put around
2796: # the \includegraphics stuff. At present we can only partially
2797: # simulate the alignments offered by html.
2798: #
2799: #
2800: my $align = lc(&Apache::lonxml::get_param('align',
2801: $parstack,
2802: $safeeval,
2803: undef,1));
2804: if(!$align) {
2805: $align = "bottom"; # This is html's default so it's ours too.
2806: }
2807: #
2808: &Apache::lonxml::debug("Alignemnt = $align");
2809: # LaTeX's image/text wrapping is really bad since it wants to
2810: # make figures float.
2811: # The user has the optional parameter (applicable only to l/r
2812: # alignment to use the picins/parpic directive to get wrapped text
2813: # this is also imperfect.. that's why we give them a choice...
2814: # so they can't yell at us for our choice.
2815: #
2816: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2817: $parstack,
2818: $safeeval,
2819: undef,0);
2820: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2821: if(!$latex_rendering) {
2822: $latex_rendering = "texwrap";
2823: }
2824: # using texwrap inside a table does not work. So, if after all of this,
2825: # texwrap is on, we turn it off if we detect we're in a table:
2826: #
2827: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2828: $latex_rendering = 'parpic';
2829: }
2830:
2831: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2832:
2833: #if original gif/jpg/png file exist do following:
2834: my $origsrc=$src;
2835: my ($path,$file) = &get_eps_image($src);
2836: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2837: &Apache::lonxml::debug("path = $path file = $file src = $src");
2838: if (-e $src) {
2839: &Apache::lonxml::debug("$src exists");
2840: my ($height_param,$width_param)=
2841: &image_size($origsrc,0.3,$parstack,$safeeval);
2842: my $destpath = $path;
2843: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2844: my $destfile = $file;
2845: $destfile =~ s/ /\_/g;
2846: my $size;
2847: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2848: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2849: $size='['.$size;
2850: $size=~s/,$/]/;
2851: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2852: .'\includegraphics'.$size.'{'.$destfile.'} ';
2853:
2854: # If there's an alignment specification we need to honor it here.
2855: # For the horizontal alignments, we will also honor the
2856: # value of the latex specfication. The default is parbox,
2857: # and that's used for illegal values too.
2858: #
2859: # Even though we set a default alignment value, the user
2860: # could have given us an illegal value. In that case we
2861: # just use the default alignment of bottom..
2862: if ($align eq "top") {
2863: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2864: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2865: my $offset = $height_param/2;
2866: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2867: } elsif ($align eq "left") {
2868: if ($latex_rendering eq "parpic") {
2869: $currentstring = '\parpic[l]{'.$currentstring.'}';
2870: } else { # wrapfig render
2871: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2872: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2873: }
2874: } elsif ($align eq "right") {
2875: if ($latex_rendering eq "parpic") {
2876: $currentstring = '\parpic[r]{'.$currentstring.'}';
2877: } else { # wrapfig rendering
2878: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2879: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2880:
2881: }
2882: } else { # Bottom is also default.
2883: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2884: }
2885: } else {
2886: &Apache::lonxml::debug("$src does not exist");
2887: #original image file doesn't exist so check the alt attribute
2888: my $alt =
2889: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2890: unless ($alt) {
2891: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2892: }
2893:
2894: if ($alt) { $currentstring .= ' '.$alt.' '; }
2895: }
2896:
2897: # And here's where the semi-quote breaks down: allow the user
2898: # to edit the beast as well by rendering the problem for edit:
2899: } elsif ($target eq 'edit') {
2900: $currentstring .=&Apache::edit::tag_start($target,$token);
2901: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2902: &Apache::edit::browse('src',undef,'alt').' '.
2903: &Apache::edit::search('src',undef,'alt').'<br />';
2904: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2905: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2906: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2907: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2908: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2909: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2910: ['','bottom','middle','top','left','right'],$token,5);
2911: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2912: ['', 'parbox', 'parpic'], $token, 2);
2913: $currentstring .=&Apache::edit::select_arg('Encyrpt URL:','encrypturl',
2914: ['no','yes'], $token, 2);
2915: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2916: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2917: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2918: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2919: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2920:
2921:
2922: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2923: if ($width) { $currentstring.=' width="'.$width.'" '; }
2924: if ($height) { $currentstring.=' height="'.$height.'" '; }
2925: $currentstring .= ' />';
2926: } elsif ($target eq 'modified') {
2927: my ($osrc,$owidth,$oheight)=
2928: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2929: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2930: $safeeval,'src','alt','align',
2931: 'TeXwidth','TeXheight', 'TeXwrap',
2932: 'width','height','encrypturl');
2933: my ($nsrc,$nwidth,$nheight)=
2934: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2935: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2936: &image_replication($loc);
2937: my ($iwidth,$iheight);
2938: if (-e $loc) {
2939: my $image = Image::Magick->new;
2940: $image->Read($loc);
2941: ($iwidth, $iheight) = ($image->Get('width'),
2942: $image->Get('height'));
2943: }
2944: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2945: # changed image or no size specified,
2946: # if they didn't explicitly change the
2947: # width or height use the ones from the image
2948: if ($iwidth && $iheight) {
2949: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2950: $token->[2]{'width'} = $iwidth;$ctag=1;
2951: }
2952: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2953: $token->[2]{'height'}=$iheight;$ctag=1;
2954: }
2955: }
2956: }
2957: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2958: # if we don't have a width or height
2959: if ($iwidth && $cwidth && !$cheight) {
2960: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2961: }
2962: if ($iheight && $cheight && !$cwidth) {
2963: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2964: }
2965: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2966: }
2967:
2968: return $currentstring;
2969: }
2970:
2971: sub end_img {
2972: my ($target,$token) = @_;
2973: my $currentstring = '';
2974: if ($target eq 'web') {
2975: $currentstring = $token->[2];
2976: } elsif ($target eq 'tex') {
2977: $currentstring = '';
2978: }
2979: return $currentstring;
2980: }
2981:
2982: #-- <applet> tag (end tag required)
2983: sub start_applet {
2984: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2985:
2986: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2987: &Apache::lonxml::extlink($code);
2988: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2989: undef,1);
2990: &Apache::lonxml::extlink($archive);
2991: my $currentstring = '';
2992: if ($target eq 'web') {
2993: if ($env{'browser.appletsuppress'} ne 'on') {
2994: $currentstring = &Apache::lonenc::encrypt_ref($token,
2995: {'code'=>$code,
2996: 'archive'=>$archive}
2997: );
2998: } else {
2999: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3000: $safeeval,undef,1);
3001: unless ($alttag) {
3002: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3003: $code);
3004: }
3005: $currentstring='[APPLET: '.$alttag.']';
3006: }
3007: } elsif ($target eq 'tex') {
3008: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3009: $safeeval,undef,1);
3010: unless ($alttag) {
3011: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3012: undef,1);
3013: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3014: $code);
3015: }
3016: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3017: '.}\end{center}';
3018: }
3019: return $currentstring;
3020: }
3021:
3022: sub end_applet {
3023: my ($target,$token) = @_;
3024: my $currentstring = '';
3025: if ($target eq 'web') {
3026: $currentstring = $token->[2];
3027: } elsif ($target eq 'tex') {
3028: }
3029: return $currentstring;
3030: }
3031:
3032: #-- <embed> tag (end tag optional/required)
3033: sub start_embed {
3034: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3035: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3036: &Apache::lonxml::extlink($src);
3037: my $currentstring = '';
3038: if ($target eq 'web') {
3039: if ($env{'browser.embedsuppress'} ne 'on') {
3040: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3041: } else {
3042: my $alttag=&Apache::lonxml::get_param
3043: ('alt',$parstack,$safeeval,undef,1);
3044: unless ($alttag) {
3045: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3046: }
3047: $currentstring='[EMBED: '.$alttag.']';
3048: }
3049: } elsif ($target eq 'tex') {
3050: }
3051: return $currentstring;
3052: }
3053:
3054: sub end_embed {
3055: my ($target,$token) = @_;
3056: my $currentstring = '';
3057: if ($target eq 'web') {
3058: $currentstring = $token->[2];
3059: } elsif ($target eq 'tex') {
3060: }
3061: return $currentstring;
3062: }
3063:
3064: #-- <param> tag (end tag forbidden)
3065: sub start_param {
3066: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3067: if (&Apache::lonxml::get_param('name',$parstack,
3068: $safeeval,undef,1)=~/^cabbase$/i) {
3069: my $value=&Apache::lonxml::get_param('value',$parstack,
3070: $safeeval,undef,1);
3071: &Apache::lonxml::extlink($value);
3072: }
3073:
3074: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3075: &Apache::lonxml::extlink($src);
3076: my $currentstring = '';
3077: if ($target eq 'web') {
3078: my %toconvert;
3079: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3080: if ($src) { $toconvert{'src'}= $src; }
3081: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3082: undef,1);
3083: if ($name=~/^cabbase$/i) {
3084: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3085: $safeeval,undef,1);
3086: }
3087: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3088: } elsif ($target eq 'tex') {
3089: }
3090: return $currentstring;
3091: }
3092:
3093: sub end_param {
3094: my ($target,$token) = @_;
3095: my $currentstring = '';
3096: if ($target eq 'web') {
3097: $currentstring = $token->[2];
3098: } elsif ($target eq 'tex') {
3099: }
3100: return $currentstring;
3101: }
3102:
3103: #-- <allow> tag
3104: sub start_allow {
3105: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3106: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3107: &Apache::lonxml::extlink($src);
3108:
3109: if ($target eq 'tex') { &image_replication($src); }
3110: my $result;
3111: if ($target eq 'edit') {
3112: $result .=&Apache::edit::tag_start($target,$token);
3113: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3114: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3115: } elsif ($target eq 'modified') {
3116: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3117: $safeeval,'src');
3118: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3119: }
3120: return $result;
3121: }
3122:
3123: sub end_allow {
3124: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3125: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3126: return '';
3127: }
3128:
3129: #-- Frames (end tag required)
3130: #-- <frameset>
3131: sub start_frameset {
3132: my ($target,$token) = @_;
3133: my $currentstring = ''; # Close any pending para.
3134: if ($target eq 'web') {
3135: if (!$Apache::lonxml::registered &&
3136: $env{'request.state'} eq 'published') {
3137: $currentstring.='<head>'.
3138: &Apache::lonmenu::registerurl(undef,$target).'</head>';
3139: }
3140: my $onLoad='';
3141: foreach my $key (keys(%{$token->[2]})) {
3142: if ($key =~ /^onload$/i) {
3143: $onLoad.=$token->[2]->{$key}.';';
3144: delete($token->[2]->{$key});
3145: }
3146: }
3147: $token->[2]->{'onload'}=&Apache::lonmenu::loadevents().';'.$onLoad;
3148: my $onUnload='';
3149: foreach my $key (keys(%{$token->[2]})) {
3150: if ($key =~ /^onunload$/i) {
3151: $onUnload.=$token->[2]->{$key}.';';
3152: delete($token->[2]->{$key});
3153: }
3154: }
3155: $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
3156: ';'.$onUnload;
3157:
3158: $currentstring .= '<'.$token->[1];
3159: foreach (keys %{$token->[2]}) {
3160: $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
3161: }
3162: $currentstring.='>';
3163: }
3164: return $currentstring;
3165: }
3166:
3167: sub end_frameset {
3168: my ($target,$token) = @_;
3169: my $currentstring = '';
3170: if ($target eq 'web') {
3171: $currentstring = $token->[2];
3172: }
3173: return $currentstring;
3174: }
3175:
3176: #-- <xmp> (end tag required)
3177: sub start_xmp {
3178: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3179: my $currentstring = '';
3180: if ($target eq 'web') {
3181: $currentstring .= $token->[4];
3182: } elsif ($target eq 'tex') {
3183: $currentstring .= '\begin{verbatim}';
3184: }
3185: return $currentstring;
3186: }
3187:
3188: sub end_xmp {
3189: my ($target,$token) = @_;
3190: my $currentstring = '';
3191: if ($target eq 'web') {
3192: $currentstring .= $token->[2];
3193: } elsif ($target eq 'tex') {
3194: $currentstring .= '\end{verbatim}';
3195: }
3196: return $currentstring;
3197: }
3198:
3199: #-- <pre> (end tag required)
3200: sub start_pre {
3201: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3202: my $currentstring = &end_p(); # close off pending <p>
3203: if ($target eq 'web') {
3204: $currentstring .= $token->[4];
3205: } elsif ($target eq 'tex') {
3206: $currentstring .= '\begin{verbatim}';
3207: &Apache::lonxml::disable_LaTeX_substitutions();
3208: }
3209: return $currentstring;
3210: }
3211:
3212: sub end_pre {
3213: my ($target,$token) = @_;
3214: my $currentstring = '';
3215: if ($target eq 'web') {
3216: $currentstring .= $token->[2];
3217: } elsif ($target eq 'tex') {
3218: $currentstring .= '\end{verbatim}';
3219: &Apache::lonxml::enable_LaTeX_substitutions();
3220: }
3221: return $currentstring;
3222: }
3223:
3224: #-- <insert>
3225: sub start_insert {
3226: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3227: my $currentstring = '';
3228: if ($target eq 'web') {
3229: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3230: $currentstring .= '<b>'.$display.'</b>';;
3231: }
3232: return $currentstring;
3233: }
3234:
3235: sub end_insert {
3236: my ($target,$token) = @_;
3237: my $currentstring = '';
3238: if ($target eq 'web') {
3239: $currentstring .= '';
3240: }
3241: return $currentstring;
3242: }
3243:
3244: #-- <externallink>
3245: sub start_externallink {
3246: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3247: my $currentstring = '';
3248: if ($target eq 'web') {
3249: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3250: $currentstring .= '<b>'.$display.'</b>';;
3251: }
3252: return $currentstring;
3253: }
3254:
3255: sub end_externallink {
3256: my ($target,$token) = @_;
3257: my $currentstring = '';
3258: if ($target eq 'web') {
3259: $currentstring .= '';
3260: }
3261: return $currentstring;
3262: }
3263:
3264: #-- <blankspace heigth="">
3265: sub start_blankspace {
3266: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3267: my $currentstring = &end_p(); # closes off any unclosed <p>
3268: if ($target eq 'tex') {
3269: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3270: $currentstring .= '\vskip '.$howmuch.' ';
3271: }
3272: return $currentstring;
3273: }
3274:
3275: sub end_blankspace {
3276: my ($target,$token) = @_;
3277: my $currentstring = '';
3278: if ($target eq 'tex') {
3279: $currentstring .= '';
3280: }
3281: return $currentstring;
3282: }
3283:
3284: #-- <abbr> tag (end tag required)
3285: sub start_abbr {
3286: my ($target,$token) = @_;
3287: my $currentstring = '';
3288: if ($target eq 'web') {
3289: $currentstring = $token->[4];
3290: }
3291: return $currentstring;
3292: }
3293:
3294: sub end_abbr {
3295: my ($target,$token) = @_;
3296: my $currentstring = '';
3297: if ($target eq 'web') {
3298: $currentstring = $token->[2];
3299: }
3300: return $currentstring;
3301: }
3302:
3303: #-- <acronym> tag (end tag required)
3304: sub start_acronym {
3305: my ($target,$token) = @_;
3306: my $currentstring = '';
3307: if ($target eq 'web') {
3308: $currentstring = $token->[4];
3309: }
3310: return $currentstring;
3311: }
3312:
3313: sub end_acronym {
3314: my ($target,$token) = @_;
3315: my $currentstring = '';
3316: if ($target eq 'web') {
3317: $currentstring = $token->[2];
3318: }
3319: return $currentstring;
3320: }
3321:
3322: #-- <area> tag (end tag forbidden)
3323: sub start_area {
3324: my ($target,$token) = @_;
3325: my $currentstring = '';
3326: if ($target eq 'web') {
3327: $currentstring = $token->[4];
3328: }
3329: return $currentstring;
3330: }
3331:
3332: sub end_area {
3333: my ($target,$token) = @_;
3334: my $currentstring = '';
3335: if ($target eq 'web') {
3336: $currentstring = $token->[2];
3337: }
3338: return $currentstring;
3339: }
3340:
3341: #-- <base> tag (end tag forbidden)
3342: sub start_base {
3343: my ($target,$token) = @_;
3344: my $currentstring = '';
3345: if ($target eq 'web') {
3346: $currentstring = $token->[4];
3347: }
3348: return $currentstring;
3349: }
3350:
3351: sub end_base {
3352: my ($target,$token) = @_;
3353: my $currentstring = '';
3354: if ($target eq 'web') {
3355: $currentstring = $token->[2];
3356: }
3357: return $currentstring;
3358: }
3359:
3360: #-- <bdo> tag (end tag required)
3361: sub start_bdo {
3362: my ($target,$token) = @_;
3363: my $currentstring = '';
3364: if ($target eq 'web') {
3365: $currentstring = $token->[4];
3366: }
3367: return $currentstring;
3368: }
3369:
3370: sub end_bdo {
3371: my ($target,$token) = @_;
3372: my $currentstring = '';
3373: if ($target eq 'web') {
3374: $currentstring = $token->[2];
3375: }
3376: return $currentstring;
3377: }
3378:
3379: #-- <bgsound> tag (end tag optional)
3380: sub start_bgsound {
3381: my ($target,$token) = @_;
3382: my $currentstring = '';
3383: if ($target eq 'web') {
3384: $currentstring = $token->[4];
3385: }
3386: return $currentstring;
3387: }
3388:
3389: sub end_bgsound {
3390: my ($target,$token) = @_;
3391: my $currentstring = '';
3392: if ($target eq 'web') {
3393: $currentstring = $token->[2];
3394: }
3395: return $currentstring;
3396: }
3397:
3398: #-- <blink> tag (end tag required)
3399: sub start_blink {
3400: my ($target,$token) = @_;
3401: my $currentstring = '';
3402: if ($target eq 'web') {
3403: $currentstring = $token->[4];
3404: }
3405: return $currentstring;
3406: }
3407:
3408: sub end_blink {
3409: my ($target,$token) = @_;
3410: my $currentstring = '';
3411: if ($target eq 'web') {
3412: $currentstring = $token->[2];
3413: }
3414: return $currentstring;
3415: }
3416:
3417: #-- <blockquote> tag (end tag required)
3418: sub start_blockquote {
3419: my ($target,$token) = @_;
3420: my $currentstring = &end_p(); # Close any unclosed <p>
3421: if ($target eq 'web') {
3422: $currentstring .= $token->[4];
3423: }
3424: return $currentstring;
3425: }
3426:
3427: sub end_blockquote {
3428: my ($target,$token) = @_;
3429: my $currentstring = '';
3430: if ($target eq 'web') {
3431: $currentstring = $token->[2];
3432: }
3433: return $currentstring;
3434: }
3435:
3436: #-- <button> tag (end tag required)
3437: sub start_button {
3438: my ($target,$token) = @_;
3439: my $currentstring = '';
3440: if ($target eq 'web') {
3441: $currentstring = $token->[4];
3442: }
3443: return $currentstring;
3444: }
3445:
3446: sub end_button {
3447: my ($target,$token) = @_;
3448: my $currentstring = '';
3449: if ($target eq 'web') {
3450: $currentstring = $token->[2];
3451: }
3452: return $currentstring;
3453: }
3454:
3455: #-- <caption> tag (end tag required)
3456: sub start_caption {
3457: my ($target,$token) = @_;
3458: my $currentstring = '';
3459: if ($target eq 'web') {
3460: $currentstring = $token->[4];
3461: }
3462: return $currentstring;
3463: }
3464:
3465: sub end_caption {
3466: my ($target,$token) = @_;
3467: my $currentstring = '';
3468: if ($target eq 'web') {
3469: $currentstring = $token->[2];
3470: }
3471: return $currentstring;
3472: }
3473:
3474: #-- <col> tag (end tag forbdden)
3475: sub start_col {
3476: my ($target,$token) = @_;
3477: my $currentstring = '';
3478: if ($target eq 'web') {
3479: $currentstring = $token->[4];
3480: }
3481: return $currentstring;
3482: }
3483:
3484: sub end_col {
3485: my ($target,$token) = @_;
3486: my $currentstring = '';
3487: if ($target eq 'web') {
3488: $currentstring = $token->[2];
3489: }
3490: return $currentstring;
3491: }
3492:
3493: #-- <colgroup> tag (end tag optional)
3494: sub start_colgroup {
3495: my ($target,$token) = @_;
3496: my $currentstring = '';
3497: if ($target eq 'web') {
3498: $currentstring = $token->[4];
3499: }
3500: return $currentstring;
3501: }
3502:
3503: sub end_colgroup {
3504: my ($target,$token) = @_;
3505: my $currentstring = '';
3506: if ($target eq 'web') {
3507: $currentstring = $token->[2];
3508: }
3509: return $currentstring;
3510: }
3511:
3512: #-- <del> tag (end tag required)
3513: sub start_del {
3514: my ($target,$token) = @_;
3515: my $currentstring = '';
3516: if ($target eq 'web') {
3517: $currentstring = $token->[4];
3518: }
3519: return $currentstring;
3520: }
3521:
3522: sub end_del {
3523: my ($target,$token) = @_;
3524: my $currentstring = '';
3525: if ($target eq 'web') {
3526: $currentstring = $token->[2];
3527: }
3528: return $currentstring;
3529: }
3530:
3531: #-- <fieldset> tag (end tag required)
3532: sub start_fieldset {
3533: my ($target,$token) = @_;
3534: my $currentstring = '';
3535: if ($target eq 'web') {
3536: $currentstring = $token->[4];
3537: }
3538: return $currentstring;
3539: }
3540:
3541: sub end_fieldset {
3542: my ($target,$token) = @_;
3543: my $currentstring = '';
3544: if ($target eq 'web') {
3545: $currentstring = $token->[2];
3546: }
3547: return $currentstring;
3548: }
3549:
3550: #-- <frame> tag (end tag forbidden)
3551: sub start_frame {
3552: my ($target,$token) = @_;
3553: my $currentstring = '';
3554: if ($target eq 'web') {
3555: $currentstring = $token->[4];
3556: }
3557: return $currentstring;
3558: }
3559:
3560: sub end_frame {
3561: my ($target,$token) = @_;
3562: my $currentstring = '';
3563: if ($target eq 'web') {
3564: $currentstring = $token->[2];
3565: }
3566: return $currentstring;
3567: }
3568:
3569: #-- <iframe> tag (end tag required)
3570: sub start_iframe {
3571: my ($target,$token) = @_;
3572: my $currentstring = '';
3573: if ($target eq 'web') {
3574: $currentstring = $token->[4];
3575: }
3576: return $currentstring;
3577: }
3578:
3579: sub end_iframe {
3580: my ($target,$token) = @_;
3581: my $currentstring = '';
3582: if ($target eq 'web') {
3583: $currentstring = $token->[2];
3584: }
3585: return $currentstring;
3586: }
3587:
3588: #-- <ins> tag (end tag required)
3589: sub start_ins {
3590: my ($target,$token) = @_;
3591: my $currentstring = '';
3592: if ($target eq 'web') {
3593: $currentstring = $token->[4];
3594: }
3595: return $currentstring;
3596: }
3597:
3598: sub end_ins {
3599: my ($target,$token) = @_;
3600: my $currentstring = '';
3601: if ($target eq 'web') {
3602: $currentstring = $token->[2];
3603: }
3604: return $currentstring;
3605: }
3606:
3607: #-- <isindex> tag (end tag forbidden)
3608: sub start_isindex {
3609: my ($target,$token) = @_;
3610: my $currentstring = '';
3611: if ($target eq 'web') {
3612: $currentstring = $token->[4];
3613: }
3614: return $currentstring;
3615: }
3616:
3617: sub end_isindex {
3618: my ($target,$token) = @_;
3619: my $currentstring = '';
3620: if ($target eq 'web') {
3621: $currentstring = $token->[2];
3622: }
3623: return $currentstring;
3624: }
3625:
3626: #-- <keygen> tag (end tag forbidden)
3627: sub start_keygen {
3628: my ($target,$token) = @_;
3629: my $currentstring = '';
3630: if ($target eq 'web') {
3631: $currentstring = $token->[4];
3632: }
3633: return $currentstring;
3634: }
3635:
3636: sub end_keygen {
3637: my ($target,$token) = @_;
3638: my $currentstring = '';
3639: if ($target eq 'web') {
3640: $currentstring = $token->[2];
3641: }
3642: return $currentstring;
3643: }
3644:
3645: #-- <label> tag
3646: sub start_label {
3647: my ($target,$token) = @_;
3648: my $currentstring = '';
3649: if ($target eq 'web') {
3650: $currentstring = $token->[4];
3651: }
3652: return $currentstring;
3653: }
3654:
3655: sub end_label {
3656: my ($target,$token) = @_;
3657: my $currentstring = '';
3658: if ($target eq 'web') {
3659: $currentstring = $token->[2];
3660: }
3661: return $currentstring;
3662: }
3663:
3664: #-- <layer> tag (end tag required)
3665: sub start_layer {
3666: my ($target,$token) = @_;
3667: my $currentstring = '';
3668: if ($target eq 'web') {
3669: $currentstring = $token->[4];
3670: }
3671: return $currentstring;
3672: }
3673:
3674: sub end_layer {
3675: my ($target,$token) = @_;
3676: my $currentstring = '';
3677: if ($target eq 'web') {
3678: $currentstring = $token->[2];
3679: }
3680: return $currentstring;
3681: }
3682:
3683: #-- <legend> tag (end tag required)
3684: sub start_legend {
3685: my ($target,$token) = @_;
3686: my $currentstring = '';
3687: if ($target eq 'web') {
3688: $currentstring = $token->[4];
3689: }
3690: return $currentstring;
3691: }
3692:
3693: sub end_legend {
3694: my ($target,$token) = @_;
3695: my $currentstring = '';
3696: if ($target eq 'web') {
3697: $currentstring = $token->[2];
3698: }
3699: return $currentstring;
3700: }
3701:
3702: #-- <link> tag (end tag forbidden)
3703: sub start_link {
3704: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3705: my $currentstring = '';
3706: if ($target eq 'web' || $target eq 'webgrade') {
3707: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3708: undef,1);
3709: &Apache::lonxml::extlink($href);
3710: $currentstring = $token->[4];
3711: }
3712: return $currentstring;
3713: }
3714:
3715: sub end_link {
3716: my ($target,$token) = @_;
3717: my $currentstring = '';
3718: if ($target eq 'web') {
3719: $currentstring = $token->[2];
3720: }
3721: return $currentstring;
3722: }
3723:
3724: #-- <marquee> tag (end tag optional)
3725: sub start_marquee {
3726: my ($target,$token) = @_;
3727: my $currentstring = '';
3728: if ($target eq 'web') {
3729: $currentstring = $token->[4];
3730: }
3731: return $currentstring;
3732: }
3733:
3734: sub end_marquee {
3735: my ($target,$token) = @_;
3736: my $currentstring = '';
3737: if ($target eq 'web') {
3738: $currentstring = $token->[2];
3739: }
3740: return $currentstring;
3741: }
3742:
3743: #-- <multicol> tag (end tag required)
3744: sub start_multicol {
3745: my ($target,$token) = @_;
3746: my $currentstring = &end_p(); # Close any pending <p>
3747: if ($target eq 'web') {
3748: $currentstring .= $token->[4];
3749: }
3750: return $currentstring;
3751: }
3752:
3753: sub end_multicol {
3754: my ($target,$token) = @_;
3755: my $currentstring = '';
3756: if ($target eq 'web') {
3757: $currentstring = $token->[2];
3758: }
3759: return $currentstring;
3760: }
3761:
3762: #-- <nobr> tag (end tag required)
3763: sub start_nobr {
3764: my ($target,$token) = @_;
3765: my $currentstring = '';
3766: if ($target eq 'web') {
3767: $currentstring = $token->[4];
3768: } elsif ($target eq 'tex') {
3769: $currentstring='\mbox{';
3770: }
3771: return $currentstring;
3772: }
3773:
3774: sub end_nobr {
3775: my ($target,$token) = @_;
3776: my $currentstring = '';
3777: if ($target eq 'web') {
3778: $currentstring = $token->[2];
3779: } elsif ($target eq 'tex') {
3780: $currentstring='}';
3781: }
3782: return $currentstring;
3783: }
3784:
3785: #-- <noembed> tag (end tag required)
3786: sub start_noembed {
3787: my ($target,$token) = @_;
3788: my $currentstring = '';
3789: if ($target eq 'web') {
3790: $currentstring = $token->[4];
3791: }
3792: return $currentstring;
3793: }
3794:
3795: sub end_noembed {
3796: my ($target,$token) = @_;
3797: my $currentstring = '';
3798: if ($target eq 'web') {
3799: $currentstring = $token->[2];
3800: }
3801: return $currentstring;
3802: }
3803:
3804: #-- <noframes> tag (end tag required)
3805: sub start_noframes {
3806: my ($target,$token) = @_;
3807: my $currentstring = '';
3808: if ($target eq 'web') {
3809: $currentstring = $token->[4];
3810: }
3811: return $currentstring;
3812: }
3813:
3814: sub end_noframes {
3815: my ($target,$token) = @_;
3816: my $currentstring = '';
3817: if ($target eq 'web') {
3818: $currentstring = $token->[2];
3819: }
3820: return $currentstring;
3821: }
3822:
3823: #-- <nolayer> tag (end tag required)
3824: sub start_nolayer {
3825: my ($target,$token) = @_;
3826: my $currentstring = '';
3827: if ($target eq 'web') {
3828: $currentstring = $token->[4];
3829: }
3830: return $currentstring;
3831: }
3832:
3833: sub end_nolayer {
3834: my ($target,$token) = @_;
3835: my $currentstring = '';
3836: if ($target eq 'web') {
3837: $currentstring = $token->[2];
3838: }
3839: return $currentstring;
3840: }
3841:
3842: #-- <noscript> tag (end tag required)
3843: sub start_noscript {
3844: my ($target,$token) = @_;
3845: my $currentstring = '';
3846: if ($target eq 'web') {
3847: $currentstring = $token->[4];
3848: }
3849: return $currentstring;
3850: }
3851:
3852: sub end_noscript {
3853: my ($target,$token) = @_;
3854: my $currentstring = '';
3855: if ($target eq 'web') {
3856: $currentstring = $token->[2];
3857: }
3858: return $currentstring;
3859: }
3860:
3861: #-- <object> tag (end tag required)
3862: sub start_object {
3863: my ($target,$token) = @_;
3864: my $currentstring = '';
3865: if ($target eq 'web') {
3866: $currentstring = $token->[4];
3867: }
3868: return $currentstring;
3869: }
3870:
3871: sub end_object {
3872: my ($target,$token) = @_;
3873: my $currentstring = '';
3874: if ($target eq 'web') {
3875: $currentstring = $token->[2];
3876: }
3877: return $currentstring;
3878: }
3879:
3880: #-- <optgroup> tag (end tag required)
3881: sub start_optgroup {
3882: my ($target,$token) = @_;
3883: my $currentstring = '';
3884: if ($target eq 'web') {
3885: $currentstring = $token->[4];
3886: }
3887: return $currentstring;
3888: }
3889:
3890: sub end_optgroup {
3891: my ($target,$token) = @_;
3892: my $currentstring = '';
3893: if ($target eq 'web') {
3894: $currentstring = $token->[2];
3895: }
3896: return $currentstring;
3897: }
3898:
3899: #-- <samp> tag (end tag required)
3900: sub start_samp {
3901: my ($target,$token) = @_;
3902: my $currentstring = '';
3903: if ($target eq 'web') {
3904: $currentstring = $token->[4];
3905: } elsif ($target eq 'tex') {
3906: $currentstring='\texttt{';
3907: }
3908: return $currentstring;
3909: }
3910:
3911: sub end_samp {
3912: my ($target,$token) = @_;
3913: my $currentstring = '';
3914: if ($target eq 'web') {
3915: $currentstring = $token->[2];
3916: } elsif ($target eq 'tex') {
3917: $currentstring='}';
3918: }
3919: return $currentstring;
3920: }
3921:
3922: #-- <server> tag
3923: sub start_server {
3924: my ($target,$token) = @_;
3925: my $currentstring = '';
3926: if ($target eq 'web') {
3927: $currentstring = $token->[4];
3928: }
3929: return $currentstring;
3930: }
3931:
3932: sub end_server {
3933: my ($target,$token) = @_;
3934: my $currentstring = '';
3935: if ($target eq 'web') {
3936: $currentstring = $token->[2];
3937: }
3938: return $currentstring;
3939: }
3940:
3941: #-- <spacer> tag (end tag forbidden)
3942: sub start_spacer {
3943: my ($target,$token) = @_;
3944: my $currentstring = &end_p(); # Close off any open <p> tag.
3945: if ($target eq 'web') {
3946: $currentstring .= $token->[4];
3947: }
3948: return $currentstring;
3949: }
3950:
3951: sub end_spacer {
3952: my ($target,$token) = @_;
3953: my $currentstring = '';
3954: if ($target eq 'web') {
3955: $currentstring = $token->[2];
3956: }
3957: return $currentstring;
3958: }
3959:
3960: #-- <span> tag (end tag required)
3961: sub start_span {
3962: my ($target,$token) = @_;
3963: my $currentstring = '';
3964: if ($target eq 'web') {
3965: $currentstring = $token->[4];
3966: }
3967: return $currentstring;
3968: }
3969:
3970: sub end_span {
3971: my ($target,$token) = @_;
3972: my $currentstring = '';
3973: if ($target eq 'web') {
3974: $currentstring = $token->[2];
3975: }
3976: return $currentstring;
3977: }
3978:
3979: #-- <tbody> tag (end tag optional)
3980: sub start_tbody {
3981: my ($target,$token) = @_;
3982: my $currentstring = '';
3983: if ($target eq 'web') {
3984: $currentstring = $token->[4];
3985: }
3986: return $currentstring;
3987: }
3988:
3989: sub end_tbody {
3990: my ($target,$token) = @_;
3991: my $currentstring = '';
3992: if ($target eq 'web') {
3993: $currentstring = $token->[2];
3994: }
3995: return $currentstring;
3996: }
3997:
3998: #-- <tfoot> tag (end tag optional)
3999: sub start_tfoot {
4000: my ($target,$token) = @_;
4001: my $currentstring = '';
4002: if ($target eq 'web') {
4003: $currentstring = $token->[4];
4004: }
4005: return $currentstring;
4006: }
4007:
4008: sub end_tfoot {
4009: my ($target,$token) = @_;
4010: my $currentstring = '';
4011: if ($target eq 'web') {
4012: $currentstring = $token->[2];
4013: }
4014: return $currentstring;
4015: }
4016:
4017: #-- <thead> tag (end tag optional)
4018: sub start_thead {
4019: my ($target,$token) = @_;
4020: my $currentstring = '';
4021: if ($target eq 'web') {
4022: $currentstring = $token->[4];
4023: }
4024: return $currentstring;
4025: }
4026:
4027: sub end_thead {
4028: my ($target,$token) = @_;
4029: my $currentstring = '';
4030: if ($target eq 'web') {
4031: $currentstring = $token->[2];
4032: }
4033: return $currentstring;
4034: }
4035:
4036: #-- <var> tag
4037: sub start_var {
4038: my ($target,$token) = @_;
4039: my $currentstring = '';
4040: if ($target eq 'web') {
4041: $currentstring = $token->[4];
4042: } elsif ($target eq 'tex') {
4043: $currentstring = '\textit{';
4044: }
4045: return $currentstring;
4046: }
4047:
4048: sub end_var {
4049: my ($target,$token) = @_;
4050: my $currentstring = '';
4051: if ($target eq 'web') {
4052: $currentstring = $token->[2];
4053: } elsif ($target eq 'tex') {
4054: $currentstring = '}';
4055: }
4056: return $currentstring;
4057: }
4058:
4059: #-- <wbr> tag (end tag forbidden)
4060: sub start_wbr {
4061: my ($target,$token) = @_;
4062: my $currentstring = '';
4063: if ($target eq 'web') {
4064: $currentstring = $token->[4];
4065: }
4066: return $currentstring;
4067: }
4068:
4069: sub end_wbr {
4070: my ($target,$token) = @_;
4071: my $currentstring = '';
4072: if ($target eq 'web') {
4073: $currentstring = $token->[2];
4074: }
4075: return $currentstring;
4076: }
4077:
4078: #-- <hideweboutput> tag
4079: sub start_hideweboutput {
4080: my ($target,$token) = @_;
4081: if ($target eq 'web') {
4082: &Apache::lonxml::startredirection();
4083: }
4084: return '';
4085: }
4086:
4087: sub end_hideweboutput {
4088: my ($target,$token) = @_;
4089: my $currentstring = '';
4090: if ($target eq 'web') {
4091: $currentstring = &Apache::lonxml::endredirection();
4092: }
4093: return '';
4094: }
4095:
4096:
4097: sub image_replication {
4098: my $src = shift;
4099: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4100: #replicates eps or ps
4101: my $epssrc = my $pssrc = $src;
4102: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4103: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4104: if (not -e $epssrc && not -e $pssrc) {
4105: my $result=&Apache::lonnet::repcopy($epssrc);
4106: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4107: }
4108: return '';
4109: }
4110: #
4111: # Get correct sizing parameter for an image given
4112: # it's initial ht. and wid. This allows sizing of
4113: # images that are generated on-the-fly (e.g. gnuplot)
4114: # as well as serving as a utility for image_size.
4115: #
4116: # Parameter:
4117: # height_param
4118: # width_param - Initial picture dimensions.
4119: # scaling - A scale factor.
4120: # parstack, - the current stack of tag attributes
4121: # from the xml parser
4122: # safeeval, - pointer to the safespace
4123: # depth, - from what level in the stack to look for attributes
4124: # (assumes -1 if unspecified)
4125: # cis - look for attrubutes case insensitively
4126: # (assumes false)
4127: #
4128: # Returns:
4129: # height, width - new dimensions.
4130: #
4131: sub resize_image {
4132: my ($height_param, $width_param, $scaling,
4133: $parstack, $safeeval, $depth, $cis) = @_;
4134:
4135: # First apply the scaling...
4136:
4137: $height_param = $height_param * $scaling;
4138: $width_param = $width_param * $scaling;
4139:
4140: #do we have any specified LaTeX size of the picture?
4141: my $toget='TeXwidth';
4142: if ($cis) {
4143: $toget=lc($toget);
4144: }
4145: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4146: $safeeval,$depth,$cis);
4147: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4148: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4149: $safeeval,$depth,$cis);
4150: #do we have any specified web size of the picture?
4151: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4152: $depth,1);
4153: if ($TeXwidth) {
4154: my $old_width_param=$width_param;
4155: if ($TeXwidth=~/(\d+)\s*\%/) {
4156: $width_param = $1*$env{'form.textwidth'}/100;
4157: } else {
4158: $width_param = $TeXwidth;
4159: }
4160: if ($TeXheight) {
4161: $height_param = $TeXheight;
4162: } elsif ($old_width_param) {
4163: $height_param=$TeXwidth/$old_width_param*$height_param;
4164: }
4165: } elsif ($TeXheight) {
4166: $height_param = $TeXheight;
4167: if ($height_param) {
4168: $width_param = $TeXheight/$height_param*$width_param;
4169: }
4170: } elsif ($width) {
4171: my $old_width_param=$width_param;
4172: $width_param = $width*$scaling;
4173: if ($old_width_param) {
4174: $height_param=$width_param/$old_width_param*$height_param;
4175: }
4176: }
4177: if ($width_param > $env{'form.textwidth'}) {
4178: my $old_width_param=$width_param;
4179: $width_param =0.95*$env{'form.textwidth'};
4180: if ($old_width_param) {
4181: $height_param=$width_param/$old_width_param*$height_param;
4182: }
4183: }
4184:
4185: return ($height_param, $width_param);
4186: }
4187:
4188: sub image_size {
4189: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4190:
4191: #size of image from gif/jpg/jpeg/png
4192: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4193: if (-e $ressrc) {
4194: $src = $ressrc;
4195: }
4196: my $image = Image::Magick->new;
4197: my $current_figure = $image->Read($src);
4198: my $width_param = $image->Get('width');
4199: my $height_param = $image->Get('height');
4200: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4201: undef($image);
4202:
4203: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4204: $scaling, $parstack, $safeeval,
4205: $depth, $cis);
4206:
4207: return ($height_param, $width_param);
4208: }
4209:
4210: sub image_width {
4211: my ($height, $width) = &image_size(@_);
4212: return $width;
4213: }
4214: # Not yet 100% sure this is correct in all circumstances..
4215: # due to my uncertainty about mods to image_size.
4216: #
4217: sub image_height {
4218: my ($height, $width) = &image_size(@_);
4219: return $height;
4220: }
4221:
4222: sub get_eps_image {
4223: my ($src)=@_;
4224: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4225:
4226: # In order to prevent the substitution of the alt text, we need to
4227: # be sure the orig_src file is on system now so:
4228:
4229: if (! -e $orig_src) {
4230: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4231: }
4232: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4233: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4234: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4235: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4236: &Apache::lonxml::debug("Filelocation gives: $src");
4237: if (! -e $src) {
4238: &Apache::lonxml::debug("$src does not exist");
4239: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4240: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4241: #if replication failed try to find ps file
4242: $src=~s/\.eps$/\.ps/;
4243: &Apache::lonxml::debug("Now looking for $src");
4244: #if no ps file try to replicate it.
4245: my $didrepcopy = &Apache::lonnet::repcopy($src);
4246: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4247: if ( (not -e $src) ||
4248: ($didrepcopy ne 'ok')) {
4249: &Apache::lonxml::debug("Failed to find or replicate $src");
4250:
4251: #if replication failed try to produce eps file dynamically
4252: $src=~s/\.ps$/\.eps/;
4253: my $temp_file;
4254: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4255: my $newsrc=$orig_src;
4256: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4257: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4258: print FILE "$newsrc\n";
4259: close FILE;
4260: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4261: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4262: if ($sext ne "") { # Put the ext. back in to uniquify.
4263: $src =~ s/\.eps$/$sext.eps/;
4264: }
4265: }
4266: }
4267: }
4268: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4269: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4270: return ($path.'/',$file);
4271: }
4272:
4273: sub eps_generation {
4274: my ($src,$file,$width_param) = @_;
4275: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4276: my $temp_file = Apache::File->new('>>'.$filename);
4277: print $temp_file "$src\n";
4278: my $newsrc = $src;
4279: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4280: $newsrc=~s/\/home\/httpd\/html\/res//;
4281: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4282: $newsrc=~s/\/\.\//\//;
4283: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4284: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4285: $newsrc=~s/\/home\/httpd\/lonUsers//;
4286: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4287: }
4288: if ($newsrc=~/\/userfiles\//) {
4289: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4290: } else {
4291: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4292: }
4293: }
4294:
4295: sub file_path {
4296: my $src=shift;
4297: my ($file,$path);
4298: if ($src =~ m!(.*)/([^/]*)$!) {
4299: $file = $2;
4300: $path = $1.'/';
4301: }
4302: return $file,$path;
4303: }
4304: # Converts a measurement in to mm from any of
4305: # the other valid LaTeX units of measure.
4306: # If the units of measure are missing from the
4307: # parameter, it is assumed to be in and returned
4308: # with mm units of measure
4309: sub recalc {
4310: my $argument = shift;
4311: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4312: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4313: my $value=$1;
4314: my $units=$2;
4315: if ($units eq 'cm') {
4316: $value*=10;
4317: } elsif ($units eq 'in') {
4318: $value*=25.4;
4319: } elsif ($units eq 'pc') {
4320: $value*=(25.4*12/72.27);
4321: } elsif ($units eq 'pt') {
4322: $value*=(25.4/72.27);
4323: }
4324: return $value.' mm';
4325: }
4326:
4327: sub LATEX_length {
4328: my $garbage=shift;
4329: $garbage=~s/^\s+$//;
4330: $garbage=~s/^\s+(\S.*)/$1/;#space before
4331: $garbage=~s/(.*\S)\s+$/$1/;#space after
4332: $garbage=~s/(\s)+/$1/;#only one space
4333: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4334: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4335: $garbage=~s/([^\\])\$/$1/g;#$
4336: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4337: $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;
4338: $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;
4339: $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;
4340: $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;
4341: $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;
4342: $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;
4343: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4344: #remove some other LaTeX command
4345: $garbage=~s|\\(\w+)\\|\\|g;
4346: $garbage=~s|\\(\w+)(\s*)|$2|g;
4347: $garbage=~s|\+|11|g;
4348: my $value=length($garbage);
4349: return $value;
4350: }
4351:
4352:
4353: # is_inside_of $tagstack $tag
4354: # This sub returns true if the current state of Xml processing
4355: # is inside of the tag.
4356: # Parameters:
4357: # tagstack - The tagstack from the parser.
4358: # tag - The tag (without the <>'s.).
4359: # Sample usage:
4360: # if (is_inside_of($tagstack "table")) {
4361: # # I'm in a table....
4362: # }
4363: sub is_inside_of {
4364: my ($tagstack, $tag) = @_;
4365: my @stack = @$tagstack;
4366: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4367: if ($stack[$i] eq $tag) {
4368: return 1;
4369: }
4370: }
4371: return 0;
4372: }
4373:
4374:
4375: 1;
4376: __END__
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