1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.350 2007/01/08 19:09:23 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 LONCAPA();
52: # use Data::Dumper;
53:
54: BEGIN {
55:
56: &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'));
57:
58: }
59:
60: #
61: # Dumps all elements of the table structure.
62: # Need this 'cause evidently when given an array, Data::Dumper only seems
63: # to dump element 0.
64: #
65: #sub debug_dump_table {
66: # my $lastrow = $#Apache::londefdef::table;
67: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
68: # my $row;
69: # for ($row =0; $row <= $lastrow; $row++ ) {
70: # my $text = Dumper($Apache::londefdef::table[$row]);
71: # &Apache::lonnet::logthis("table [ $row ]".$text);
72: # }
73: #}
74: sub initialize_londefdef {
75: $Apache::londefdef::TD_redirection=0;
76: @Apache::londefdef::table = ();
77: $Apache::londefdef::select=0;
78: undef(@Apache::londefdef::description);
79: @Apache::londefdef::DD=(0);
80: @Apache::londefdef::DT=(0);
81: @Apache::londefdef::seenDT=(0);
82: $Apache::londefdef::list_index=0;
83: undef($Apache::londefdef::head);
84: undef($Apache::londefdef::title);
85: }
86:
87: #======================= TAG SUBROUTINES =====================
88: #-- <output>
89: sub start_output {
90: my ($target) = @_;
91: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
92: return '';
93: }
94: sub end_output {
95: my ($target) = @_;
96: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
97: return '';
98: }
99: #-- <m> tag
100: sub start_m {
101: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
102: my $currentstring = '';
103: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
104: if ($target eq 'web' || $target eq 'analyze') {
105: &Apache::lonxml::debug("M is starting with:$inside:");
106: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
107: if ($eval eq 'on') {
108: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
109: #&Apache::lonxml::debug("M is evaulated to:$inside:");
110: }
111: my $tex = $inside;
112: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
113: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
114: if ($Apache::lontexconvert::errorstring) {
115: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
116: $tex = &HTML::Entities::encode($tex,'<>&"');
117: my ($linenumber) =
118: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
119: if (defined($linenumber)) {
120: my @tex=split("\n",$tex);
121: $tex[$linenumber]='<b><font color="red">'.
122: $tex[$linenumber].'</font></b>';
123: $tex=join("\n",@tex);
124: }
125: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
126: $Apache::lontexconvert::errorstring='';
127: }
128: #&Apache::lonxml::debug("M is ends with:$currentstring:");
129: $Apache::lonxml::post_evaluate=0;
130: } elsif ($target eq 'tex') {
131: $currentstring = $inside;
132: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
133: if ($eval eq 'on') {
134: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
135: }
136: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
137: # detect simple math mode entry exits, and convert them
138: # to use \ensuremath
139: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
140: $currentstring=~s/^(\s*)\$/$1/;
141: $currentstring=~s/\$(\s*)$/$1/;
142: $currentstring='\ensuremath{'.$currentstring.'}';
143: }
144: $Apache::lonxml::post_evaluate=0;
145: }
146: return $currentstring;
147: }
148:
149: sub end_m {
150: my ($target,$token) = @_;
151: my $currentstring = '';
152: if ($target eq 'tex') {
153: $currentstring = "";
154: }
155: return $currentstring;
156: }
157:
158: sub start_tthoption {
159: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
160: my $result;
161: if ($target eq 'web' || $target eq 'webgrade') {
162: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
163: $style);
164: $inside=~s/^\s*//;
165: if ($env{'browser.mathml'}) {
166: &tth::ttmoptions($inside);
167: } else {
168: &tth::tthoptions($inside);
169: }
170: }
171: return $result;
172: }
173:
174: sub end_tthoption {
175: my ($target,$token) = @_;
176: my $result;
177: return $result;
178: }
179:
180: #-- <html> tag (end tag optional)
181: sub start_html {
182: my ($target,$token) = @_;
183: my $currentstring = '';
184: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
185: # start_body() takes care of emitting the <html>
186: } elsif ($target eq 'tex') {
187: $currentstring .=
188: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
189: if (($env{'form.latex_type'}=~'batchmode') ||
190: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
191: $currentstring .= '\newcommand{\keephidden}[1]{}'.
192: '\renewcommand{\deg}{$^{\circ}$}'.
193: '\usepackage{multirow}'.
194: '\usepackage{longtable}'.
195: '\usepackage{textcomp}'.
196: '\usepackage{makeidx}'.
197: '\usepackage[dvips]{graphicx}'.
198: '\usepackage{wrapfig}'.
199: '\usepackage{picins}'.
200: '\usepackage{epsfig}'.
201: '\usepackage{calc}'.
202: '\usepackage{amsmath}'.
203: '\usepackage{amssymb}'.
204: '\usepackage{amsfonts}'.
205: '\usepackage{amsthm}'.
206: '\usepackage{amscd}'.
207: '\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}}'.
208: '\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}}';
209: }
210: return $currentstring;
211: }
212:
213: sub end_html {
214: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
215: my $currentstring = '';
216: if ($target eq 'web' || $target eq 'webgrade') {
217: # end_body takes care of the </html>
218: }
219: return $currentstring;
220: }
221:
222: #-- <head> tag (end tag optional)
223: sub start_head {
224: my ($target,$token) = @_;
225: my $currentstring = '';
226: if ($target eq 'web' || $target eq 'webgrade') {
227: &Apache::lonxml::startredirection();
228: }
229: return $currentstring;
230: }
231:
232: sub end_head {
233: my ($target,$token) = @_;
234: my $currentstring = '';
235: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
236: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
237: # in case there is a </head> but no <head>
238: if ($Apache::lonxml::redirection) {
239: $Apache::londefdef::head = &Apache::lonxml::endredirection();
240: }
241: }
242: return $currentstring;
243: }
244:
245: #-- <map> tag (end tag required)
246: sub start_map {
247: my ($target,$token) = @_;
248: my $currentstring = '';
249: if ($target eq 'web' || $target eq 'webgrade') {
250: $currentstring = $token->[4];
251: }
252: return $currentstring;
253: }
254:
255: sub end_map {
256: my ($target,$token) = @_;
257: my $currentstring = '';
258: if ($target eq 'web' || $target eq 'webgrade') {
259: $currentstring = $token->[2];
260: }
261: return $currentstring;
262: }
263:
264: #-- <select> tag (end tag required)
265: sub start_select {
266: my ($target,$token) = @_;
267: my $currentstring = '';
268: if ($target eq 'web' || $target eq 'webgrade') {
269: $currentstring = $token->[4];
270: } elsif ($target eq 'tex') {
271: $Apache::londefdef::select=0;
272: }
273: return $currentstring;
274: }
275:
276: sub end_select {
277: my ($target,$token) = @_;
278: my $currentstring = '';
279: if ($target eq 'web' || $target eq 'webgrade') {
280: $currentstring = $token->[2];
281: }
282: return $currentstring;
283: }
284:
285: #-- <option> tag (end tag optional)
286: sub start_option {
287: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
288: my $currentstring = '';
289: if ($target eq 'web' || $target eq 'webgrade') {
290: $currentstring = $token->[4];
291: } elsif ($target eq 'tex') {
292: $Apache::londefdef::select++;
293: if ($Apache::londefdef::select == 1) {
294: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
295: } else {
296: $currentstring='\keephidden{';
297: }
298: }
299: return $currentstring;
300: }
301:
302: sub end_option {
303: my ($target,$token) = @_;
304: my $currentstring = '';
305: if ($target eq 'web' || $target eq 'webgrade') {
306: $currentstring = $token->[2];
307: } elsif ($target eq 'tex') {
308: $currentstring='}';
309: }
310: return $currentstring;
311: }
312:
313: #-- <input> tag (end tag forbidden)
314: sub start_input {
315: my ($target,$token) = @_;
316: my $currentstring = '';
317: if ($target eq 'web' || $target eq 'webgrade') {
318: $currentstring = $token->[4];
319: }
320: return $currentstring;
321: }
322:
323: sub end_input {
324: my ($target,$token) = @_;
325: my $currentstring = '';
326: if ($target eq 'web' || $target eq 'webgrade') {
327: $currentstring = $token->[2];
328: }
329: return $currentstring;
330: }
331:
332: #-- <textarea> tag (end tag required)
333: sub start_textarea {
334: my ($target,$token) = @_;
335: my $currentstring = '';
336: if ($target eq 'web' || $target eq 'webgrade') {
337: $currentstring = $token->[4];
338: }
339: return $currentstring;
340: }
341:
342: sub end_textarea {
343: my ($target,$token) = @_;
344: my $currentstring = '';
345: if ($target eq 'web' || $target eq 'webgrade') {
346: $currentstring = $token->[2];
347: }
348: return $currentstring;
349: }
350:
351: #-- <form> tag (end tag required)
352: sub start_form {
353: my ($target,$token) = @_;
354: my $currentstring = '';
355: if ($target eq 'web' || $target eq 'webgrade') {
356: $currentstring = $token->[4];
357: }
358: return $currentstring;
359: }
360:
361: sub end_form {
362: my ($target,$token) = @_;
363: my $currentstring = '';
364: if ($target eq 'web' || $target eq 'webgrade') {
365: $currentstring = $token->[2];
366: }
367: return $currentstring;
368: }
369:
370: #-- <title> tag (end tag required)
371: sub start_title {
372: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
373: my $currentstring = '';
374: if ($target eq 'web' || $target eq 'webgrade') {
375: $Apache::londefdef::title =
376: &Apache::lonxml::get_all_text('/title',$parser,$style);
377: } elsif ($target eq 'tex') {
378: $currentstring .= '\keephidden{Title of the document: '
379: }
380: if ($target eq 'meta') {
381: $currentstring='<title>';
382: &start_output($target);
383: }
384: return $currentstring;
385: }
386:
387: sub end_title {
388: my ($target,$token) = @_;
389: my $currentstring = '';
390: if ($target eq 'web' || $target eq 'webgrade') {
391: # start_title takes care of swallowing the title
392: } elsif ($target eq 'tex') {
393: $currentstring .= '}';
394: }
395: if ($target eq 'meta') {
396: &end_output($target);
397: $currentstring='</title>';
398: }
399: return $currentstring;
400: }
401:
402: #-- <meta> tag (end tag forbidden)
403: sub start_meta {
404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
405: my $currentstring = '';
406: if ($target eq 'web' || $target eq 'webgrade') {
407: my $args='';
408: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
409: if ($args eq '') {
410: &Apache::lonxml::get_all_text("/meta",$parser,$style);
411: } else {
412: $currentstring = $token->[4];
413: }
414: } elsif ($target eq 'meta') {
415: unless (&Apache::lonxml::get_param
416: ('http-equiv',$parstack,$safeeval,undef,1)) {
417: my $name=$token->[2]->{'name'};
418: $name=~tr/A-Z/a-z/;
419: $name=~s/\s/\_/gs;
420: $name=~s/\W//gs;
421: if ($name) {
422: $currentstring='<'.$name;
423: my $display=&Apache::lonxml::get_param
424: ('display',$parstack,$safeeval,undef,1);
425: if ($display) {
426: $display=~s/\"/\'/g;
427: $currentstring.=' display="'.$display.'"';
428: }
429: $currentstring.='>'.
430: &Apache::lonxml::get_param
431: ('content',$parstack,$safeeval,undef,1).
432: '</'.$name.'>';
433: }
434: my $display=&Apache::lonxml::get_param
435: ('display',$parstack,$safeeval,undef,1);
436: if ($display) {
437: $display=&HTML::Entities::encode($display,'<>&"');
438: $currentstring.='<'.$name.'.display>'.$display.
439: '</'.$name.'.display>';
440: }
441: }
442: } elsif ($target eq 'tex') {
443: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
444: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
445: if ((not defined $content) && (not defined $name)) {
446: &Apache::lonxml::startredirection();
447: }
448: }
449: return $currentstring;
450: }
451:
452: sub end_meta {
453: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
454: my $currentstring = '';
455: if ($target eq 'web' || $target eq 'webgrade') {
456: my $args='';
457: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
458: if ($args ne '') {
459: $currentstring = $token->[4];
460: }
461: } elsif ($target eq 'tex') {
462: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
463: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
464: if ((not defined $content) && (not defined $name)) {
465: &Apache::lonxml::endredirection();
466: }
467: }
468: return $currentstring;
469: }
470:
471: # accessrule
472: sub start_accessrule {
473: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
474: my $currentstring = '';
475: my $eff=&Apache::lonxml::get_param
476: ('effect',$parstack,$safeeval,undef,1);
477: my $realm=&Apache::lonxml::get_param
478: ('realm',$parstack,$safeeval,undef,1);
479: my $role=&Apache::lonxml::get_param
480: ('role',$parstack,$safeeval,undef,1);
481: $realm=~s/\s+//g;
482: $realm=~s/\//\_/g;
483: $realm=~s/^\_//;
484: $realm=~s/\W/\;/g;
485: $role=~s/\s+//g;
486: $role=~s/\//\_/g;
487: $role=~s/\W/\;/g;
488: if ($target eq 'web') {
489: my $args='';
490: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
491: if ($args eq '') {
492: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
493: } else {
494: $currentstring = $token->[4];
495: }
496: }
497: if ($target eq 'meta') {
498: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
499: }
500: return $currentstring;
501: }
502:
503: sub end_accessrule {
504: my ($target,$token,$tagstack,$parstack,$parser) = @_;
505: my $currentstring = '';
506: if ($target eq 'web') {
507: my $args='';
508: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
509: if ($args ne '') {
510: $currentstring = $token->[4];
511: }
512: }
513: return $currentstring;
514: }
515:
516: #-- <body> tag (end tag required)
517: sub start_body {
518: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
519: my $currentstring = '';
520:
521: if ($target eq 'web' || $target eq 'webgrade') {
522: if ($Apache::lonhomework::parsing_a_problem) {
523: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
524: return '';
525: }
526:
527: if (&is_inside_of($tagstack, "head")) {
528: &end_head(@_);
529: }
530: $currentstring =
531: &Apache::loncommon::start_page($Apache::londefdef::title,
532: $Apache::londefdef::head,
533: {'add_entries' => $token->[2],
534: 'no_title' => 1,
535: 'force_register' => 1});
536:
537: if ($env{'request.state'} ne 'published') {
538: $currentstring.=&Apache::lonmenu::constspaceform();
539: $currentstring.=(<<EDITBUTTON);
540: <form method="post">
541: <input type="submit" name="editmode" accesskey="e" value="Edit" />
542: </form>
543: <br />
544: EDITBUTTON
545: }
546: $currentstring.=&Apache::lonxml::message_location();
547: } elsif ($target eq 'tex') {
548: $currentstring = '\begin{document}';
549: }
550: return $currentstring;
551: }
552:
553: sub end_body {
554: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
555: my $currentstring = &end_p(); # Close off unclosed <p>
556: if ($target eq 'web' || $target eq 'webgrade') {
557: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
558: } elsif ($target eq 'tex') {
559: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
560: }
561: return $currentstring;
562: }
563:
564: # \begin{center} causes a new paragprah spacing that looks odd inside
565: # of a table cell. Same at the end of a \center but with a slightly
566: # larger space .. hence center_correction and center_end_correction.
567: #
568: sub center_correction { return '\vspace*{-6 mm}'; }
569: sub center_end_correction { return '\vspace*{-7 mm}'; }
570:
571: #-- <center> tag (end tag required)
572: sub start_center {
573: my ($target,$token,$tagstack) = @_;
574: my $currentstring = &end_p(); # Close off any prior para.
575: if ($target eq 'web' || $target eq 'webgrade') {
576: $currentstring .= $token->[4];
577: } elsif ($target eq 'tex') {
578: if (&is_inside_of($tagstack, "table")) {
579: $currentstring .= ¢er_correction();
580: }
581: $currentstring .= '\begin{center}';
582: }
583: return $currentstring;
584: }
585:
586: sub end_center {
587: my ($target,$token,$tagstack) = @_;
588: my $currentstring = '';
589: if ($target eq 'web' || $target eq 'webgrade') {
590: $currentstring = $token->[2];
591: } elsif ($target eq 'tex') {
592: $currentstring = '\end{center}';
593: if (&is_inside_of($tagstack, "table")) {
594: $currentstring .= ¢er_end_correction();
595: }
596: }
597: return $currentstring;
598: }
599:
600: #-- <b> tag (end tag required)
601: # NOTE: In TeX mode disables internal <p>
602: sub start_b {
603: my ($target,$token) = @_;
604: my $currentstring = '';
605: if ($target eq 'web' || $target eq 'webgrade') {
606: $currentstring = $token->[4];
607: } elsif ($target eq 'tex') {
608: &disable_para();
609: $currentstring .= '\textbf{';
610: }
611: return $currentstring;
612: }
613:
614: sub end_b {
615: my ($target,$token) = @_;
616: my $currentstring = '';
617: if ($target eq 'web' || $target eq 'webgrade') {
618: $currentstring = $token->[2];
619: } elsif ($target eq 'tex') {
620: &enable_para();
621: $currentstring = '}';
622: }
623: return $currentstring;
624: }
625:
626: #-- <strong> tag (end tag required)
627: # NOTE: in TeX mode disables internal <p>
628: sub start_strong {
629: my ($target,$token) = @_;
630: my $currentstring = '';
631: if ($target eq 'web' || $target eq 'webgrade') {
632: $currentstring = $token->[4];
633: } elsif ($target eq 'tex') {
634: &disable_para();
635: $currentstring = '\textbf{';
636: }
637: return $currentstring;
638: }
639:
640: sub end_strong {
641: my ($target,$token) = @_;
642: my $currentstring = '';
643: if ($target eq 'web' || $target eq 'webgrade') {
644: $currentstring = $token->[2];
645: } elsif ($target eq 'tex') {
646: &enable_para();
647: $currentstring = '}';
648: }
649: return $currentstring;
650: }
651:
652: #-- <h1> tag (end tag required)
653: sub start_h1 {
654: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
655: my $currentstring = &end_p(); # Close off any prior para.
656: if ($target eq 'web' || $target eq 'webgrade') {
657: $currentstring .= $token->[4];
658: } elsif ($target eq 'tex') {
659: my $pre;
660: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
661: if ($align eq 'center') {
662: $pre='\begin{center}';
663: } elsif ($align eq 'left') {
664: $pre='\rlap{';
665: } elsif ($align eq 'right') {
666: $pre=' \hfill \llap{';
667: }
668: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
669: if (not defined $TeXsize) {$TeXsize="large";}
670: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
671: } elsif ($target eq 'meta') {
672: $currentstring.='<subject>';
673: &start_output($target);
674: }
675: return $currentstring;
676: }
677:
678: sub end_h1 {
679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
680: my $currentstring = '';
681: if ($target eq 'web' || $target eq 'webgrade') {
682: $currentstring .= $token->[2];
683: } elsif ($target eq 'tex') {
684: my $post='\vskip 0 mm ';
685: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
686: if ($align eq 'center') {
687: $post='\end{center}';
688: } elsif ($align eq 'left') {
689: $post='} \hfill'.'\vskip 0 mm ';
690: } elsif ($align eq 'right') {
691: $post='}'.'\vskip 0 mm ';
692: }
693: $currentstring .= '}}'.$post;
694: } elsif ($target eq 'meta') {
695: &end_output($target);
696: $currentstring='</subject>';
697: }
698: return $currentstring;
699: }
700:
701: #-- <h2> tag
702: sub start_h2 {
703: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
704: my $currentstring = &end_p(); # Close off any prior para.
705: if ($target eq 'web' || $target eq 'webgrade') {
706: $currentstring .= $token->[4];
707: } elsif ($target eq 'tex') {
708: my $pre;
709: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
710: if ($align eq 'center') {
711: $pre='\begin{center}';
712: } elsif ($align eq 'left') {
713: $pre='\rlap{';
714: } elsif ($align eq 'right') {
715: $pre=' \hfill \llap{';
716: }
717: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
718: if (not defined $TeXsize) {$TeXsize="large";}
719: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
720: }
721: return $currentstring;
722: }
723:
724: sub end_h2 {
725: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
726: my $currentstring = '';
727: if ($target eq 'web' || $target eq 'webgrade') {
728: $currentstring .= $token->[2];
729: } elsif ($target eq 'tex') {
730: my $post='\vskip 0 mm ';
731: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
732: if ($align eq 'center') {
733: $post='\end{center}';
734: } elsif ($align eq 'left') {
735: $post='} \hfill'.'\vskip 0 mm ';
736: } elsif ($align eq 'right') {
737: $post='}'.'\vskip 0 mm ';
738: }
739: $currentstring .= '}}'.$post;
740: }
741: return $currentstring;
742: }
743:
744: #-- <h3> tag
745: sub start_h3 {
746: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
747: my $currentstring = &end_p(); # Close off any prior para.
748: if ($target eq 'web' || $target eq 'webgrade') {
749: $currentstring .= $token->[4];
750: } elsif ($target eq 'tex') {
751: my $pre;
752: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
753: if ($align eq 'center') {
754: $pre='\begin{center}';
755: } elsif ($align eq 'left') {
756: $pre='\rlap{';
757: } elsif ($align eq 'right') {
758: $pre=' \hfill \llap{';
759: }
760: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
761: if (not defined $TeXsize) {$TeXsize="large";}
762: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
763: }
764: return $currentstring;
765: }
766:
767: sub end_h3 {
768: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
769: my $currentstring = '';
770: if ($target eq 'web' || $target eq 'webgrade') {
771: $currentstring .= $token->[2];
772: } elsif ($target eq 'tex') {
773: my $post='\vskip 0 mm ';
774: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
775: if ($align eq 'center') {
776: $post='\end{center}';
777: } elsif ($align eq 'left') {
778: $post='} \hfill'.'\vskip 0 mm ';
779: } elsif ($align eq 'right') {
780: $post='}'.'\vskip 0 mm ';
781: }
782: $currentstring .= '}}'.$post;
783: }
784: return $currentstring;
785: }
786:
787: #-- <h4> tag
788: sub start_h4 {
789: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
790: my $currentstring = &end_p(); # Close off any prior para.
791: if ($target eq 'web' || $target eq 'webgrade') {
792: $currentstring .= $token->[4];
793: } elsif ($target eq 'tex') {
794: my $pre;
795: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
796: if ($align eq 'center') {
797: $pre='\begin{center}';
798: } elsif ($align eq 'left') {
799: $pre='\rlap{';
800: } elsif ($align eq 'right') {
801: $pre=' \hfill \llap{';
802: }
803: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
804: if (not defined $TeXsize) {$TeXsize="large";}
805: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
806: }
807: return $currentstring;
808: }
809:
810: sub end_h4 {
811: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
812: my $currentstring = '';
813: if ($target eq 'web' || $target eq 'webgrade') {
814: $currentstring .= $token->[2];
815: } elsif ($target eq 'tex') {
816: my $post='\vskip 0 mm ';
817: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
818: if ($align eq 'center') {
819: $post='\end{center}';
820: } elsif ($align eq 'left') {
821: $post='} \hfill'.'\vskip 0 mm ';
822: } elsif ($align eq 'right') {
823: $post='}'.'\vskip 0 mm ';
824: }
825: $currentstring .= '}}'.$post;
826: }
827: return $currentstring;
828: }
829:
830: #-- <h5> tag
831: sub start_h5 {
832: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
833: my $currentstring = &end_p(); # Close off any prior paras.
834: if ($target eq 'web' || $target eq 'webgrade') {
835: $currentstring .= $token->[4];
836: } elsif ($target eq 'tex') {
837: my $pre;
838: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
839: if ($align eq 'center') {
840: $pre='\begin{center}';
841: } elsif ($align eq 'left') {
842: $pre='\rlap{';
843: } elsif ($align eq 'right') {
844: $pre=' \hfill \llap{';
845: }
846: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
847: if (not defined $TeXsize) {$TeXsize="large";}
848: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
849: }
850: return $currentstring;
851: }
852:
853: sub end_h5 {
854: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
855: my $currentstring = '';
856: if ($target eq 'web' || $target eq 'webgrade') {
857: $currentstring .= $token->[2];
858: } elsif ($target eq 'tex') {
859: my $post='\vskip 0 mm ';
860: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
861: if ($align eq 'center') {
862: $post='\end{center}';
863: } elsif ($align eq 'left') {
864: $post='} \hfill'.'\vskip 0 mm ';
865: } elsif ($align eq 'right') {
866: $post='}'.'\vskip 0 mm ';
867: }
868: $currentstring .= '}}'.$post;
869: }
870: return $currentstring;
871: }
872:
873: #-- <h6> tag
874: sub start_h6 {
875: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
876: my $currentstring = &end_p(); # Close off any prior paras.
877: if ($target eq 'web' || $target eq 'webgrade') {
878: $currentstring .= $token->[4];
879: } elsif ($target eq 'tex') {
880: my $pre;
881: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
882: if ($align eq 'center') {
883: $pre='\begin{center}';
884: } elsif ($align eq 'left') {
885: $pre='\rlap{';
886: } elsif ($align eq 'right') {
887: $pre=' \hfill \llap{';
888: }
889: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
890: if (not defined $TeXsize) {$TeXsize="large";}
891: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
892: }
893: return $currentstring;
894: }
895:
896: sub end_h6 {
897: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
898: my $currentstring = '';
899: if ($target eq 'web' || $target eq 'webgrade') {
900: $currentstring .= $token->[2];
901: } elsif ($target eq 'tex') {
902: my $post='\vskip 0 mm ';
903: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
904: if ($align eq 'center') {
905: $post='\end{center}';
906: } elsif ($align eq 'left') {
907: $post='} \hfill'.'\vskip 0 mm ';
908: } elsif ($align eq 'right') {
909: $post='}'.'\vskip 0 mm ';
910: }
911: $currentstring .= '}}'.$post;
912: }
913: return $currentstring;
914: }
915:
916: #--- <cite> tag (end tag required)
917: sub start_cite {
918: my ($target,$token) = @_;
919: my $currentstring = '';
920: if ($target eq 'web' || $target eq 'webgrade') {
921: $currentstring .= $token->[4];
922: } elsif ($target eq 'tex') {
923: $currentstring .= '\textit{';
924: }
925: return $currentstring;
926: }
927:
928: sub end_cite {
929: my ($target,$token) = @_;
930: my $currentstring = '';
931: if ($target eq 'web' || $target eq 'webgrade') {
932: $currentstring .= $token->[2];
933: } elsif ($target eq 'tex') {
934: $currentstring .= '}';
935: }
936: return $currentstring;
937: }
938:
939: #-- <i> tag (end tag required)
940: sub start_i {
941: my ($target,$token) = @_;
942: my $currentstring = '';
943: if ($target eq 'web' || $target eq 'webgrade') {
944: $currentstring .= $token->[4];
945: } elsif ($target eq 'tex') {
946: $currentstring .= '\textit{';
947: }
948: return $currentstring;
949: }
950:
951: sub end_i {
952: my ($target,$token) = @_;
953: my $currentstring = '';
954: if ($target eq 'web' || $target eq 'webgrade') {
955: $currentstring .= $token->[2];
956: } elsif ($target eq 'tex') {
957: $currentstring .= '}';
958: }
959: return $currentstring;
960: }
961:
962: #-- <address> tag (end tag required)
963: sub start_address {
964: my ($target,$token) = @_;
965: my $currentstring = '';
966: if ($target eq 'web' || $target eq 'webgrade') {
967: $currentstring .= $token->[4];
968: } elsif ($target eq 'tex') {
969: $currentstring .= '\textit{';
970: }
971: return $currentstring;
972: }
973:
974: sub end_address {
975: my ($target,$token) = @_;
976: my $currentstring = '';
977: if ($target eq 'web' || $target eq 'webgrade') {
978: $currentstring .= $token->[2];
979: } elsif ($target eq 'tex') {
980: $currentstring .= '}';
981: }
982: return $currentstring;
983: }
984:
985: #-- <dfn> tag (end tag required)
986: sub start_dfn {
987: my ($target,$token) = @_;
988: my $currentstring = '';
989: if ($target eq 'web' || $target eq 'webgrade') {
990: $currentstring .= $token->[4];
991: } elsif ($target eq 'tex') {
992: $currentstring .= '\textit{';
993: }
994: return $currentstring;
995: }
996:
997: sub end_dfn {
998: my ($target,$token) = @_;
999: my $currentstring = '';
1000: if ($target eq 'web' || $target eq 'webgrade') {
1001: $currentstring .= $token->[2];
1002: } elsif ($target eq 'tex') {
1003: $currentstring .= '}';
1004: }
1005: return $currentstring;
1006: }
1007:
1008: #-- <tt> tag (end tag required)
1009: sub start_tt {
1010: my ($target,$token) = @_;
1011: my $currentstring = '';
1012: if ($target eq 'web' || $target eq 'webgrade') {
1013: $currentstring .= $token->[4];
1014: } elsif ($target eq 'tex') {
1015: $currentstring .= '\texttt{';
1016: }
1017: return $currentstring;
1018: }
1019:
1020: sub end_tt {
1021: my ($target,$token) = @_;
1022: my $currentstring = '';
1023: if ($target eq 'web' || $target eq 'webgrade') {
1024: $currentstring .= $token->[2];
1025: } elsif ($target eq 'tex') {
1026: $currentstring .= '}';
1027: }
1028: return $currentstring;
1029: }
1030:
1031: #-- <kbd> tag (end tag required)
1032: sub start_kbd {
1033: my ($target,$token) = @_;
1034: my $currentstring = '';
1035: if ($target eq 'web' || $target eq 'webgrade') {
1036: $currentstring .= $token->[4];
1037: } elsif ($target eq 'tex') {
1038: $currentstring .= '\texttt{';
1039: }
1040: return $currentstring;
1041: }
1042:
1043: sub end_kbd {
1044: my ($target,$token) = @_;
1045: my $currentstring = '';
1046: if ($target eq 'web' || $target eq 'webgrade') {
1047: $currentstring .= $token->[2];
1048: } elsif ($target eq 'tex') {
1049: $currentstring .= '}';
1050: }
1051: return $currentstring;
1052: }
1053:
1054: #-- <code> tag (end tag required)
1055: sub start_code {
1056: my ($target,$token) = @_;
1057: my $currentstring = '';
1058: if ($target eq 'web' || $target eq 'webgrade') {
1059: $currentstring .= $token->[4];
1060: } elsif ($target eq 'tex') {
1061: $currentstring .= '\texttt{';
1062: }
1063: return $currentstring;
1064: }
1065:
1066: sub end_code {
1067: my ($target,$token) = @_;
1068: my $currentstring = '';
1069: if ($target eq 'web' || $target eq 'webgrade') {
1070: $currentstring .= $token->[2];
1071: } elsif ($target eq 'tex') {
1072: $currentstring .= '}';
1073: }
1074: return $currentstring;
1075: }
1076:
1077: #-- <em> tag (end tag required)
1078: sub start_em {
1079: my ($target,$token) = @_;
1080: my $currentstring = '';
1081: if ($target eq 'web' || $target eq 'webgrade') {
1082: $currentstring .= $token->[4];
1083: } elsif ($target eq 'tex') {
1084: $currentstring .= '\emph{';
1085: }
1086: return $currentstring;
1087: }
1088:
1089: sub end_em {
1090: my ($target,$token) = @_;
1091: my $currentstring = '';
1092: if ($target eq 'web' || $target eq 'webgrade') {
1093: $currentstring .= $token->[2];
1094: } elsif ($target eq 'tex') {
1095: $currentstring .= '}';
1096: }
1097: return $currentstring;
1098: }
1099:
1100: #-- <q> tag (end tag required)
1101: sub start_q {
1102: my ($target,$token) = @_;
1103: my $currentstring = '';
1104: if ($target eq 'web' || $target eq 'webgrade') {
1105: $currentstring .= $token->[4];
1106: } elsif ($target eq 'tex') {
1107: $currentstring .= '\emph{';
1108: }
1109: return $currentstring;
1110: }
1111:
1112: sub end_q {
1113: my ($target,$token) = @_;
1114: my $currentstring = '';
1115: if ($target eq 'web' || $target eq 'webgrade') {
1116: $currentstring .= $token->[2];
1117: } elsif ($target eq 'tex') {
1118: $currentstring .= '}';
1119: }
1120: return $currentstring;
1121: }
1122:
1123: # <p> is a bit strange since it does not require a closing </p>
1124: # However in latex, we must often output closing stuff to end
1125: # environments and {}'s etc. Therefore we do all the work
1126: # of figuring out the ending strings in the start tag processing,
1127: # and provide a mechanism to output the stop text external
1128: # to tag processing.
1129: #
1130: {
1131:
1132: my $closing_string = ''; # String required to close <p>
1133:
1134: # Some tags are <p> fragile meaning that <p> inside of them
1135: # does not work within TeX mode. This is managed via the
1136: # counter below:
1137: #
1138:
1139: my $para_disabled = 0;
1140:
1141: sub disable_para {
1142: $para_disabled++;
1143: }
1144: sub enable_para {
1145: $para_disabled--;
1146: }
1147:
1148:
1149: #-- <p> tag (end tag optional)
1150: #optional attribute - align="center|left|right"
1151: sub start_p {
1152: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1153: my $currentstring = '';
1154: if ($target eq 'web' || $target eq 'webgrade') {
1155: $currentstring .= &end_p(); # close off prior para if in progress.
1156: $currentstring .= $token->[4];
1157: if (! ($currentstring =~ /\//)) {
1158: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1159: }
1160: } elsif ($target eq 'tex' && !$para_disabled) {
1161:
1162: $currentstring .= &end_p(); # close off prior para if in progress.
1163: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1164: if ($align eq 'center') {
1165: $currentstring .='\begin{center}\par ';
1166: $closing_string = '\end{center}';
1167: if (&is_inside_of($tagstack, "table")) {
1168: $currentstring = ¢er_correction().$currentstring;
1169: }
1170: } elsif ($align eq 'right') {
1171: $currentstring.="\n".'{\flushright ';
1172: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1173: $closing_string= "}\n";
1174: } elsif ($align eq 'left') {
1175: $currentstring.= "\n".'{\flushleft ';
1176: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1177: $closing_string = "}\n";
1178: } else {
1179: $currentstring.='\par ';
1180: if (&is_inside_of($tagstack, 'table')) {
1181: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1182: } else {
1183: $closing_string = '\strut\\\\\strut ';
1184: }
1185: }
1186:
1187: }
1188: return $currentstring;
1189: }
1190: #
1191: # End paragraph processing just requires that we output the
1192: # closing string that was saved and blank it.
1193: sub end_p {
1194: # Note only 'tex' mode uses disable_para and enable_para
1195: # so we don't need to know the target in the check below:
1196:
1197: if (!$para_disabled) {
1198: my $current_string = $closing_string;
1199: $closing_string = ''; # Not in a para anymore.
1200: return $current_string;
1201: } else {
1202: return '';
1203: }
1204:
1205: }
1206: }
1207: #-- <br> tag (end tag forbidden)
1208: sub start_br {
1209: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1210: my $currentstring = '';
1211: if ($target eq 'web' || $target eq 'webgrade') {
1212: $currentstring .= $token->[4];
1213: } elsif ($target eq 'tex') {
1214: my @tempo=@$tagstack;
1215: my $signal=0;
1216: # Not going to factor this to is_inside_of since that would require
1217: # multiple stack traversals.
1218: #
1219: for (my $i=$#tempo;$i>=0;$i--) {
1220: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1221: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1222: $signal=1;
1223: }
1224: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1225: $signal = 1;
1226: }
1227: }
1228: if ($signal eq 1) {
1229: $currentstring .= ' \vskip 0 mm ';
1230: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1231: $currentstring .= '\strut \\\\ \strut ';
1232: } else { # Honor break in simple <sup></sup>
1233: $currentstring .= '}} \strut \\\\ \strut \ensuremath{^{';
1234: }
1235: }
1236: return $currentstring;
1237: }
1238:
1239: sub end_br {
1240: my ($target,$token) = @_;
1241: my $currentstring = '';
1242: if ($target eq 'web' || $target eq 'webgrade') {
1243: $currentstring .= $token->[2];
1244: }
1245: return $currentstring;
1246: }
1247:
1248: #-- <big> tag (end tag required)
1249: sub start_big {
1250: my ($target,$token) = @_;
1251: my $currentstring = '';
1252: if ($target eq 'web' || $target eq 'webgrade') {
1253: $currentstring .= $token->[4];
1254: } elsif ($target eq 'tex') {
1255: $currentstring .= '{\large ';
1256: }
1257: return $currentstring;
1258: }
1259:
1260: sub end_big {
1261: my ($target,$token) = @_;
1262: my $currentstring = '';
1263: if ($target eq 'web' || $target eq 'webgrade') {
1264: $currentstring .= $token->[2];
1265: } elsif ($target eq 'tex') {
1266: $currentstring .= '}';
1267: }
1268: return $currentstring;
1269: }
1270:
1271: #-- <small> tag (end tag required)
1272: sub start_small {
1273: my ($target,$token) = @_;
1274: my $currentstring = '';
1275: if ($target eq 'web' || $target eq 'webgrade') {
1276: $currentstring .= $token->[4];
1277: } elsif ($target eq 'tex') {
1278: $currentstring .= '{\footnotesize ';
1279: }
1280: return $currentstring;
1281: }
1282:
1283: sub end_small {
1284: my ($target,$token) = @_;
1285: my $currentstring = '';
1286: if ($target eq 'web' || $target eq 'webgrade') {
1287: $currentstring .= $token->[2];
1288: } elsif ($target eq 'tex') {
1289: $currentstring .= '}';
1290: }
1291: return $currentstring;
1292: }
1293:
1294: #-- <basefont> tag (end tag forbidden)
1295: sub start_basefont {
1296: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1297: my $currentstring = '';
1298: if ($target eq 'web' || $target eq 'webgrade') {
1299: $currentstring = $token->[4];
1300: } elsif ($target eq 'tex') {
1301: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1302: if (defined $basesize) {
1303: $currentstring = '{\\'.$basesize.' ';
1304: }
1305: }
1306: return $currentstring;
1307: }
1308:
1309: sub end_basefont {
1310: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1311: my $currentstring = '';
1312: if ($target eq 'web' || $target eq 'webgrade') {
1313: $currentstring = $token->[4];
1314: } elsif ($target eq 'tex') {
1315: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1316: if (defined $basesize) {
1317: $currentstring = '}';
1318: }
1319: }
1320: return $currentstring;
1321: }
1322:
1323: #-- <font> tag (end tag required)
1324: sub start_font {
1325: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1326: my $currentstring = '';
1327: if ($target eq 'web' || $target eq 'webgrade') {
1328: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1329: if ($face!~/symbol/i) {
1330: if (($env{'browser.fontenhance'} eq 'on') ||
1331: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1332: }
1333: $currentstring = $token->[4];
1334: } elsif ($target eq 'tex') {
1335: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1336: if (defined $fontsize) {
1337: $currentstring = '{\\'.$fontsize.' ';
1338: }
1339: }
1340: return $currentstring;
1341: }
1342:
1343: sub end_font {
1344: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1345: my $currentstring = '';
1346: if ($target eq 'web' || $target eq 'webgrade') {
1347: $currentstring = $token->[2];
1348: } elsif ($target eq 'tex') {
1349: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1350: if (defined $fontsize) {
1351: $currentstring = '}';
1352: }
1353: }
1354: return $currentstring;
1355: }
1356:
1357: #-- <strike> tag (end tag required)
1358: sub start_strike {
1359: my ($target,$token) = @_;
1360: my $currentstring = '';
1361: if ($target eq 'web' || $target eq 'webgrade') {
1362: $currentstring .= $token->[4];
1363: } elsif ($target eq 'tex') {
1364: &Apache::lonxml::startredirection();
1365: }
1366: return $currentstring;
1367: }
1368:
1369: sub end_strike {
1370: my ($target,$token) = @_;
1371: my $currentstring = '';
1372: if ($target eq 'web' || $target eq 'webgrade') {
1373: $currentstring .= $token->[2];
1374: } elsif ($target eq 'tex') {
1375: $currentstring=&Apache::lonxml::endredirection();
1376: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1377: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1378: $currentstring=~s/(\S)\s*$/$1\}/;
1379: }
1380: return $currentstring;
1381: }
1382:
1383: #-- <s> tag (end tag required)
1384: sub start_s {
1385: my ($target,$token) = @_;
1386: my $currentstring = '';
1387: if ($target eq 'web' || $target eq 'webgrade') {
1388: $currentstring .= $token->[4];
1389: } elsif ($target eq 'tex') {
1390: &Apache::lonxml::startredirection();
1391: }
1392: return $currentstring;
1393: }
1394:
1395: sub end_s {
1396: my ($target,$token) = @_;
1397: my $currentstring = '';
1398: if ($target eq 'web' || $target eq 'webgrade') {
1399: $currentstring .= $token->[2];
1400: } elsif ($target eq 'tex') {
1401: $currentstring=&Apache::lonxml::endredirection();
1402: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1403: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1404: $currentstring=~s/(\S)\s*$/$1\}/;
1405: }
1406: return $currentstring;
1407: }
1408:
1409: #-- <sub> tag (end tag required)
1410: sub start_sub {
1411: my ($target,$token) = @_;
1412: my $currentstring = '';
1413: if ($target eq 'web' || $target eq 'webgrade') {
1414: $currentstring .= $token->[4];
1415: } elsif ($target eq 'tex') {
1416: $currentstring .= '\ensuremath{_{';
1417: }
1418: return $currentstring;
1419: }
1420:
1421: sub end_sub {
1422: my ($target,$token) = @_;
1423: my $currentstring = '';
1424: if ($target eq 'web' || $target eq 'webgrade') {
1425: $currentstring .= $token->[2];
1426: } elsif ($target eq 'tex') {
1427: $currentstring .= '}}';
1428: }
1429: return $currentstring;
1430: }
1431:
1432: #-- <sup> tag (end tag required)
1433: sub start_sup {
1434: my ($target,$token) = @_;
1435: my $currentstring = '';
1436: if ($target eq 'web' || $target eq 'webgrade') {
1437: $currentstring .= $token->[4];
1438: } elsif ($target eq 'tex') {
1439: $currentstring .= '\ensuremath{^{';
1440: }
1441: return $currentstring;
1442: }
1443:
1444: sub end_sup {
1445: my ($target,$token) = @_;
1446: my $currentstring = '';
1447: if ($target eq 'web' || $target eq 'webgrade') {
1448: $currentstring .= $token->[2];
1449: } elsif ($target eq 'tex') {
1450: $currentstring .= '}}';
1451: }
1452: return $currentstring;
1453: }
1454:
1455: #-- <hr> tag (end tag forbidden)
1456: sub start_hr {
1457: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1458: my $currentstring = &end_p(); # End enclosing para.
1459: if ($target eq 'web' || $target eq 'webgrade') {
1460: $currentstring .= $token->[4];
1461: } elsif ($target eq 'tex') {
1462: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1463: if (defined $LaTeXwidth) {
1464: if ($LaTeXwidth=~/^%/) {
1465: substr($LaTeXwidth,0,1)='';
1466: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1467: }
1468: } else {
1469: $LaTeXwidth ='0.9\textwidth';
1470: }
1471: my ($pre,$post);
1472: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1473: if (($align eq 'center') || (not defined $align)) {
1474: $pre=''; $post='';
1475: } elsif ($align eq 'left') {
1476: $pre='\rlap{'; $post='} \hfill';
1477: } elsif ($align eq 'right') {
1478: $pre=' \hfill \llap{'; $post='}';
1479: }
1480: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1481: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1482: }
1483: return $currentstring;
1484: }
1485:
1486: sub end_hr {
1487: my ($target,$token) = @_;
1488: my $currentstring = '';
1489: if ($target eq 'web' || $target eq 'webgrade') {
1490: $currentstring .= $token->[2];
1491: }
1492: return $currentstring;
1493: }
1494:
1495: #-- <div> tag (end tag required)
1496: {
1497:
1498: # Since div can be nested, the stack below is used
1499: # in 'tex' mode to store the ending strings
1500: # for the div stack.
1501:
1502: my @div_end_stack;
1503:
1504: sub start_div {
1505: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1506: my $currentstring = &end_p(); # Close enclosing para.
1507: if ($target eq 'web' || $target eq 'webgrade') {
1508: $currentstring .= $token->[4];
1509: }
1510: if ($target eq 'tex') {
1511: # 4 possible alignments: left, right, center, and -missing-.
1512:
1513: my $endstring = '';
1514:
1515: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1516: $safeeval, undef, 1));
1517: if ($align eq 'center') {
1518: $currentstring .= '\begin{center}';
1519: $endstring = '\end{center}';
1520: if (&is_inside_of($tagstack, "table")) {
1521: $currentstring = ¢er_correction().$currentstring;
1522: }
1523: }
1524: elsif ($align eq 'right') {
1525: $currentstring .= '\begin{flushright}';
1526: $endstring .= '\end{flushright}';
1527: } elsif ($align eq 'left') {
1528: $currentstring .= '\begin{flushleft}';
1529: $endstring = '\end{flushleft}';
1530: } else {
1531:
1532: }
1533: $currentstring .= "\n"; # For human readability.
1534: $endstring = "\n$endstring\n"; # For human readability
1535: push(@div_end_stack, $endstring);
1536: }
1537: return $currentstring;
1538: }
1539:
1540: sub end_div {
1541: my ($target,$token) = @_;
1542: my $currentstring = '';
1543: if ($target eq 'web' || $target eq 'webgrade') {
1544: $currentstring .= $token->[2];
1545: }
1546: if ($target eq 'tex') {
1547: my $endstring = pop @div_end_stack;
1548: $currentstring .= $endstring;
1549: }
1550: return $currentstring;
1551: }
1552: }
1553:
1554: #-- <a> tag (end tag required)
1555: sub start_a {
1556: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1557: my $currentstring = '';
1558: if ($target eq 'web' || $target eq 'webgrade') {
1559: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1560: undef,1);
1561: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1562: } elsif ($target eq 'tex') {
1563: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1564: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1565: if ($a=~/\S/) {
1566: $a=~s/([^\\])%/$1\\\%/g;
1567: $currentstring .= '\ref{URI: '.$a.'}';
1568: } elsif ($b=~/\S/) {
1569: $currentstring .= '\ref{Anchor: '.$b.'}';
1570: } else {
1571: $currentstring.='';
1572: }
1573: }
1574: return $currentstring;
1575: }
1576:
1577: sub end_a {
1578: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1579: my $currentstring = '';
1580: if ($target eq 'web' || $target eq 'webgrade') {
1581: $currentstring .= $token->[2];
1582: }
1583: return $currentstring;
1584: }
1585:
1586: #-- <li> tag (end tag optional)
1587: sub start_li {
1588: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1589: my $currentstring = '';
1590: if ($target eq 'web' || $target eq 'webgrade') {
1591: $currentstring = $token->[4];
1592: } elsif ($target eq 'tex') {
1593: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1594: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1595: #FIXME need to support types i and I
1596: if ($type=~/disc/) {
1597: $currentstring .= ' \item[$\bullet$] ';
1598: } elsif ($type=~/circle/) {
1599: $currentstring .= ' \item[$\circ$] ';
1600: } elsif ($type=~/square/) {
1601: $currentstring .= ' \item[$\diamond$] ';
1602: } elsif ($type eq '1') {
1603: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1604: } elsif ($type eq 'A') {
1605: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1606: } elsif ($type eq 'a') {
1607: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1608: } elsif ($value ne '') {
1609: $currentstring .= ' \item['.$value.'] ';
1610: } else {
1611: $currentstring .= ' \item ';
1612: }
1613: $Apache::londefdef::list_index++;
1614: }
1615: return $currentstring;
1616: }
1617:
1618: sub end_li {
1619: my ($target,$token) = @_;
1620: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1621: if ($target eq 'web' || $target eq 'webgrade') {
1622: $currentstring .= $token->[2];
1623: }
1624: return $currentstring;
1625: }
1626:
1627: #-- <u> tag (end tag required)
1628: sub start_u {
1629: my ($target,$token) = @_;
1630: my $currentstring = '';
1631: if ($target eq 'web' || $target eq 'webgrade') {
1632: $currentstring .= $token->[4];
1633: } elsif ($target eq 'tex') {
1634: &Apache::lonxml::startredirection();
1635: }
1636: return $currentstring;
1637: }
1638:
1639: sub end_u {
1640: my ($target,$token) = @_;
1641: my $currentstring = '';
1642: if ($target eq 'web' || $target eq 'webgrade') {
1643: $currentstring .= $token->[2];
1644: } elsif ($target eq 'tex') {
1645: $currentstring=&Apache::lonxml::endredirection();
1646: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1647: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1648: $currentstring=~s/(\S)\s*$/$1\}/;
1649: }
1650: return $currentstring;
1651: }
1652:
1653: #-- <ul> tag (end tag required)
1654: sub start_ul {
1655: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1656: my $currentstring = &end_p(); # Close off enclosing list.
1657: if ($target eq 'web' || $target eq 'webgrade') {
1658: $currentstring .= $token->[4];
1659: } elsif ($target eq 'tex') {
1660: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1661: $Apache::londefdef::list_index=0;
1662: if ($TeXtype eq 'disc') {
1663: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1664: '\renewcommand{\labelitemii}{$\bullet$}'.
1665: '\renewcommand{\labelitemiii}{$\bullet$}'.
1666: '\renewcommand{\labelitemiv}{$\bullet$}';
1667: } elsif ($TeXtype eq 'circle') {
1668: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1669: '\renewcommand{\labelitemii}{$\circ$}'.
1670: '\renewcommand{\labelitemiii}{$\circ$}'.
1671: '\renewcommand{\labelitemiv}{$\circ$}';
1672: } elsif ($TeXtype eq 'square') {
1673: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1674: '\renewcommand{\labelitemii}{$\diamond$}'.
1675: '\renewcommand{\labelitemiii}{$\diamond$}'.
1676: '\renewcommand{\labelitemiv}{$\diamond$}';
1677: }
1678: $currentstring .= '\strut \begin{itemize}';
1679: }
1680: return $currentstring;
1681: }
1682:
1683: sub end_ul {
1684: my ($target,$token) = @_;
1685: my $currentstring = '';
1686: if ($target eq 'web' || $target eq 'webgrade') {
1687: $currentstring = $token->[2];
1688: } elsif ($target eq 'tex') {
1689: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1690: '\renewcommand{\labelitemii}{$\bullet$}'.
1691: '\renewcommand{\labelitemiii}{$\bullet$}'.
1692: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1693: }
1694: return $currentstring;
1695: }
1696:
1697: #-- <menu> tag (end tag required)
1698: sub start_menu {
1699: my ($target,$token) = @_;
1700: my $currentstring = '';
1701: if ($target eq 'web' || $target eq 'webgrade') {
1702: $currentstring = $token->[4];
1703: } elsif ($target eq 'tex') {
1704: $currentstring = " \\begin{itemize} ";
1705: }
1706: return $currentstring;
1707: }
1708:
1709: sub end_menu {
1710: my ($target,$token) = @_;
1711: my $currentstring = '';
1712: if ($target eq 'web' || $target eq 'webgrade') {
1713: $currentstring = $token->[2];
1714: } elsif ($target eq 'tex') {
1715: $currentstring = " \\end{itemize}";
1716: }
1717: return $currentstring;
1718: }
1719:
1720: #-- <dir> tag (end tag required)
1721: sub start_dir {
1722: my ($target,$token) = @_;
1723: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1724: if ($target eq 'web' || $target eq 'webgrade') {
1725: $currentstring .= $token->[4];
1726: } elsif ($target eq 'tex') {
1727: $currentstring .= " \\begin{itemize} ";
1728: }
1729: return $currentstring;
1730: }
1731:
1732: sub end_dir {
1733: my ($target,$token) = @_;
1734: my $currentstring = '';
1735: if ($target eq 'web' || $target eq 'webgrade') {
1736: $currentstring = $token->[2];
1737: } elsif ($target eq 'tex') {
1738: $currentstring = " \\end{itemize}";
1739: }
1740: return $currentstring;
1741: }
1742:
1743: #-- <ol> tag (end tag required)
1744: sub start_ol {
1745: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1746: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1747: if ($target eq 'web' || $target eq 'webgrade') {
1748: $currentstring .= $token->[4];
1749: } elsif ($target eq 'tex') {
1750: $Apache::londefdef::list_index=0;
1751: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1752: if ($type eq '1') {
1753: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1754: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1755: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1756: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1757: } elsif ($type eq 'A') {
1758: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1759: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1760: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1761: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1762: } elsif ($type eq 'a') {
1763: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1764: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1765: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1766: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1767: } elsif ($type eq 'i') {
1768: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1769: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1770: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1771: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1772: } elsif ($type eq 'I') {
1773: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1774: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1775: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1776: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1777: }
1778: $currentstring .= '\strut \begin{enumerate}';
1779: }
1780: return $currentstring;
1781: }
1782:
1783: sub end_ol {
1784: my ($target,$token) = @_;
1785: my $currentstring = '';
1786: if ($target eq 'web' || $target eq 'webgrade') {
1787: $currentstring = $token->[2];
1788: } elsif ($target eq 'tex') {
1789: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1790: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1791: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1792: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1793: }
1794: return $currentstring;
1795: }
1796:
1797: #-- <dl> tag (end tag required)
1798: sub start_dl {
1799: my ($target,$token) = @_;
1800: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1801: if ($target eq 'web' || $target eq 'webgrade') {
1802: $currentstring .= $token->[4];
1803: } elsif ($target eq 'tex') {
1804: $currentstring .= '\begin{description}';
1805: $Apache::londefdef::DL++;
1806: push(@Apache::londefdef::description,[]);
1807: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1808: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1809: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1810: }
1811: return $currentstring;
1812: }
1813:
1814: sub end_dl {
1815: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1816: my $currentstring = '';
1817: if ($target eq 'web' || $target eq 'webgrade') {
1818: $currentstring = $token->[2];
1819: } elsif ($target eq 'tex') {
1820: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1821: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1822: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1823: $currentstring.=' '.$element.' ';
1824: }
1825: pop(@Apache::londefdef::description);
1826: $currentstring.='\end{description}';
1827: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1828: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1829: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1830: $Apache::londefdef::DL--;
1831: }
1832: return $currentstring;
1833: }
1834:
1835: #-- <dt> tag (end tag optional)
1836: sub start_dt {
1837: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1838: my $currentstring='';
1839: if ($target eq 'web' || $target eq 'webgrade') {
1840: $currentstring = $token->[4];
1841: } elsif ($target eq 'tex') {
1842: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1843: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1844: &Apache::lonxml::startredirection();
1845: $Apache::londefdef::DT[-1]++;
1846: $Apache::londefdef::seenDT[-1]=1;
1847: }
1848: return $currentstring;
1849: }
1850:
1851: sub end_dt {
1852: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1853: my $currentstring = '';
1854: if ($target eq 'web' || $target eq 'webgrade') {
1855: $currentstring = $token->[2];
1856: } elsif ($target eq 'tex') {
1857: if ($Apache::londefdef::DT[-1]) {
1858: my $data=&item_cleanup();
1859: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1860: $Apache::londefdef::DT[-1]--;
1861: }
1862: }
1863: return $currentstring;
1864: }
1865:
1866: sub item_cleanup {
1867: my $item=&Apache::lonxml::endredirection();
1868: $item=~s/\\begin{center}//g;
1869: $item=~s/\\end{center}//g;
1870: return $item;
1871: }
1872:
1873: #-- <dd> tag (end tag optional)
1874: sub start_dd {
1875: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1876: my $currentstring = '';
1877: if ($target eq 'web' || $target eq 'webgrade') {
1878: $currentstring = $token->[4];
1879: } elsif ($target eq 'tex') {
1880: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1881: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1882: if (!$Apache::londefdef::seenDT[-1]) {
1883: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1884: }
1885: push(@{$Apache::londefdef::description[-1]},'');
1886: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1887: $Apache::londefdef::DD[-1]++;
1888: &Apache::lonxml::startredirection();
1889: }
1890: return $currentstring;
1891: }
1892:
1893: sub end_dd {
1894: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1895: my $currentstring = '';
1896: if ($target eq 'web' || $target eq 'webgrade') {
1897: $currentstring = $token->[2];
1898: } elsif ($target eq 'tex') {
1899: $Apache::londefdef::description[-1]->[-1].=
1900: &Apache::lonxml::endredirection().' \vskip 0mm ';
1901: $Apache::londefdef::DD[-1]--;
1902: }
1903: return $currentstring;
1904: }
1905:
1906: #-- <table> tag (end tag required)
1907: # <table> also ends any prior <p> that is not closed.
1908: # but, unless I allow <p>'s to nest, that's the
1909: # only way I could think of to allow <p> in
1910: # <tr> <th> bodies
1911: #
1912: #list of supported attributes: border,width,TeXwidth
1913: sub start_table {
1914: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1915: my $textwidth = '';
1916: my $currentstring = &end_p();
1917: if ($target eq 'web' || $target eq 'webgrade') {
1918: $currentstring .= $token->[4];
1919: } elsif ($target eq 'tex') {
1920: push(@Apache::londefdef::table, {});
1921: $Apache::londefdef::table[-1]{'row_number'} = -1;
1922: #maximum table's width (default coincides with text line length)
1923: if ($#Apache::londefdef::table==0) {
1924: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1925: $textwidth=~/(\d+\.?\d*)/;
1926: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1927: } else {
1928: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1929: #the maximum width of nested table is determined by LATeX width of parent cell
1930: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1931: } else {
1932: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1933: $textwidth=$Apache::londefdef::table[-2]{'width'};
1934: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1935: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1936: }
1937: }
1938: }
1939:
1940: # width either comes forced from the TeXwidth or the width parameters.
1941: # in either case it can be a percentage or absolute width.
1942: # in the width case we ignore absolute width
1943: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1944: if (!defined($TeXwidth)) {
1945: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1946: $safeeval,undef,1);
1947: if ($htmlwidth =~ /%/) {
1948: $TeXwidth = $htmlwidth;
1949: } else {
1950: $TeXwidth = $textwidth;
1951: }
1952: } else {
1953: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1954: }
1955: if ($TeXwidth=~/%/) {
1956: $Apache::londefdef::table[-1]{'percent'}=1;
1957: $TeXwidth=~/(\d+)/;
1958: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1959: } else {
1960: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1961: }
1962: # In the end, however the table width cannot be wider than $textwidth...
1963:
1964: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1965: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1966: }
1967:
1968: #table's border
1969: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1970: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1971: unless (defined $border) { $border = 0; }
1972: if ($border) {
1973: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1974: $Apache::londefdef::table[-1]{'vinc'} = '&';
1975: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1976: } else {
1977: $Apache::londefdef::table[-1]{'hinc'} = '';
1978: $Apache::londefdef::table[-1]{'vinc'} = '&';
1979: $Apache::londefdef::table[-1]{'vvinc'} = '';
1980: }
1981: if ($#Apache::londefdef::table==0) {
1982: # Note that \newline seems to destroy the alignment envs.
1983: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1984: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1985: }
1986: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1987: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1988: $Apache::londefdef::table[-1]{'objectlen'}=[];
1989: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1990: $Apache::londefdef::table[-1]{'maxlen'}=[];
1991: $Apache::londefdef::table[-1]{'minlen'}=[];
1992: $Apache::londefdef::table[-1]{'content'}=[];
1993: $Apache::londefdef::table[-1]{'align'}=[];
1994: if (&is_inside_of($tagstack, 'sup')) {
1995: $currentstring .= '}} \\\\ \ensuremath{^{ ';
1996: }
1997: if (&is_inside_of($tagstack, 'sub')) {
1998: $currentstring .= '}} \\\\ \ensuremath{_{ ';
1999: }
2000: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2001:
2002:
2003: }
2004: return $currentstring;
2005: }
2006:
2007: sub end_table {
2008: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2009: my $currentstring = '';
2010: if ($target eq 'web' || $target eq 'webgrade') {
2011: $currentstring = $token->[2];
2012: } elsif ($target eq 'tex') {
2013: my $inmemory = '';
2014: my $output = '';
2015: my $WARNING='';
2016: #width of columns from TeXwidth attributes
2017:
2018: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2019: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2020: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2021: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2022: }
2023: }
2024: }
2025: #free space and number of empty columns
2026: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2027: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2028: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2029: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2030: $empty_columns++;
2031: } else {
2032: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2033: }
2034: }
2035: #boundaries for contents columns
2036: my @min_len=();#columns can not be narrower
2037: my @max_len=();#maximum length of column
2038: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2039: my ($localmin,$localmax)=(0,0);
2040: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2041: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2042: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2043: }
2044: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2045: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2046: }
2047: }
2048: push @min_len, $localmin;
2049: push @max_len, $localmax;
2050: }
2051: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2052: my $localmin=0,;
2053: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2054: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2055: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2056: }
2057: }
2058: if ($max_len[$jn]<$localmin) {
2059: $max_len[$jn]=$localmin;
2060: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2061: }#object size is bigger
2062: if ($min_len[$jn]<$localmin) {
2063: $min_len[$jn]=$localmin;
2064: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2065: }#object size is bigger
2066: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2067: $min_len[$jn]=0;
2068: $max_len[$jn]=0;
2069: }
2070: }
2071: #final adjustment of column width
2072: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2073: my @adjust=();
2074: #step 1. adjustment by maximum value
2075: my $space_neeeded=0;
2076: for (my $jn=0;$jn<=$#max_len;$jn++) {
2077: $space_neeeded=$space_neeeded+$max_len[$jn];
2078: }
2079: if ($space_neeeded<=$available_space) {
2080: for (my $jn=0;$jn<=$#max_len;$jn++) {
2081: if ($fwidth[$jn]==0) {
2082: $fwidth[$jn]=$max_len[$jn];
2083: }
2084: }
2085: } else {
2086: #step 2. adjustment by minimum value (estimation)
2087: $space_neeeded=0;
2088: for (my $jn=0;$jn<=$#min_len;$jn++) {
2089: $space_neeeded+=$min_len[$jn];
2090: }
2091: if ($space_neeeded>$available_space) {
2092: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2093: for (my $jn=0;$jn<=$#max_len;$jn++) {
2094: if ($fwidth[$jn]==0) {
2095: $fwidth[$jn]=$min_len[$jn];
2096: }
2097: }
2098: #check if we have objects which can be scaled
2099: my $how_many_to_scale=0;
2100: my @to_scale=();
2101: for (my $jn=0;$jn<=$#max_len;$jn++) {
2102: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2103: $how_many_to_scale++;
2104: push @to_scale, $jn;
2105: }
2106: }
2107: if ($how_many_to_scale>0) {
2108: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2109: foreach my $jn (@to_scale) {
2110: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2111: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2112: if ($1 ne '') {
2113: my $current_length=&recalc($1);
2114: $current_length=~/(\d+\.?\d*)/;
2115: $current_length=$current_length-$space_to_adjust;
2116: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2117: }
2118: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2119: if ($1 ne '') {
2120: my $current_length=$1;
2121: $current_length=$current_length-$space_to_adjust;
2122: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2123: }
2124: }
2125: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2126: }
2127: }
2128: } else {
2129: #step 3. adjustment over minimal + corrections
2130: my $enlarge_coef=$available_space/$space_neeeded;
2131: my $acsessive=0;
2132: for (my $jn=0;$jn<=$#min_len;$jn++) {
2133: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2134: if ($adjust[$jn]>$max_len[$jn]) {
2135: $fwidth[$jn]=$max_len[$jn];
2136: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2137: $adjust[$jn]=0;
2138: }
2139: }
2140: if ($acsessive>0) {
2141: #we have an excess of space and can redistribute it
2142: my $notempty_columns=0;
2143: for (my $jn=0;$jn<=$#min_len;$jn++) {
2144: if ($adjust[$jn]!=0) {
2145: $notempty_columns++;
2146: }
2147: }
2148: my $per_column=$acsessive/$notempty_columns;
2149: for (my $jn=0;$jn<=$#min_len;$jn++) {
2150: if ($adjust[$jn]!=0) {
2151: $adjust[$jn]+=$per_column;
2152: $fwidth[$jn]=$adjust[$jn];
2153: }
2154: }
2155: } else {
2156: for (my $jn=0;$jn<=$#min_len;$jn++) {
2157: $fwidth[$jn]=$adjust[$jn];
2158: }
2159: }
2160: }
2161: }
2162: #use all available width if it is defined in % or as TeXwidth
2163: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2164: my $current=0;
2165: for (my $i=0;$i<=$#fwidth;$i++) {
2166: $current+=$fwidth[$i];
2167: }
2168: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2169: for (my $i=0;$i<=$#fwidth;$i++) {
2170: $fwidth[$i]*=$coef;
2171: }
2172: }
2173: #removing of empty columns if allowed
2174: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2175: if ($permission eq 'yes') {
2176: my @cleaned_table=();
2177: my @cleaned_header=();
2178: my $colind=0;
2179: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2180: if ($fwidth[$jn]!=0) {
2181: #we need to copy column
2182: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2183: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2184: $cleaned_header[$colind]=$fwidth[$jn];
2185: }
2186: $colind++;
2187: }
2188: }
2189: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2190: @fwidth=@cleaned_header;
2191: }
2192: #construct header of the table
2193: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2194: for (my $in=0;$in<=$#fwidth;$in++) {
2195: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2196: }
2197: $header_of_table .= '}';
2198: #fill the table
2199: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2200: my $have_rowspan = 0;
2201: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2202:
2203: #-----------------------------------------------------------
2204: # I think this order of doing things will ensure that
2205: # single rowspan, columspan and combined row/colspans will
2206: # work correctly. LaTeX is delicate here.
2207: # RF.
2208:
2209: # Start a rowspan if necessary:
2210:
2211: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2212: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2213: #
2214: # Do the appropriate magic if this has a colspan
2215: #
2216:
2217: if ($colspan > 1) {
2218: my $spanwidth = 0;
2219: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2220: $spanwidth += $fwidth[$spancol];
2221: }
2222: $output .= '\multicolumn{'.
2223: $colspan
2224: ."}";
2225: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2226: $output .= '{|c|}{';
2227: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2228: $output .= '{|r|}{';
2229: }
2230: else {
2231: $output .= "{|p{$spanwidth mm}|}{";
2232: }
2233:
2234: }
2235:
2236: # Rowspan... if colspan is 1, and there's an alignment we'll need
2237: # to kick in a multicolumn in order to get the alignment spec.
2238: # this must precede the multirow or LaTex gets quite upset.
2239: # Naturally if colspan > 1 we've already done that above ^
2240: #
2241: my $multirow_aligned = 0;
2242: if ($rowspan > 1) {
2243: if ($colspan == 1) {
2244: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2245: $output .= '\multicolumn{1}{|c|}{';
2246: $multirow_aligned = 1;
2247: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2248: $output .= '\multicolumn{1}{|r|}{';
2249: $multirow_aligned = 1;
2250: }
2251: }
2252: $have_rowspan++;
2253: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2254:
2255: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2256: s{^\s*\\par\s*}{};
2257: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2258: s{\s*\\vskip\s*0pt\s*$}{};
2259:
2260: #
2261: # If we did not throw in a multicolumn to align, then add
2262: # an extra {
2263: # so we close correctly without having to keep additional state
2264: # around
2265: #
2266: if (!$multirow_aligned) {
2267: $output .= '{';
2268: }
2269: }
2270: if (($rowspan eq '^') || ($rowspan eq '_')) {
2271: $have_rowspan++;
2272: }
2273: #--------------------------------------------------------------
2274:
2275:
2276: # For right and center alignment of single cells.
2277: # we are going to use a multicolumn with a span of 1 to specify alignment.
2278: #
2279: if ($colspan == 1 && $rowspan == 1) {
2280: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2281: $output .= '\multicolumn{1}{|c|}{';
2282: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2283: $output .= '\multicolumn{1}{|r|}{';
2284: }
2285: }
2286:
2287: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2288:
2289: if (($colspan == 1 && $rowspan == 1) &&
2290: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2291: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2292: $output .= '}';
2293: }
2294:
2295: # Close off any open multirow:
2296:
2297: if ($rowspan > 1) {
2298: $output .= '}}';
2299: }
2300: # Close off the colspan...
2301: #
2302: if ($colspan > 1) {
2303: $output .= '}';
2304: $jn += $colspan-1; # Adjust for number of rows really left.
2305: }
2306: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2307: }
2308: # If have_rowspan > 0, and borders are on, then
2309: # we need to do more than put an \hline at the bottom of row.
2310: # we need to do the appropriate \cline to ensure that
2311: # the spanned rows don't have \hlines through them.
2312:
2313: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2314: $output .= ' \\\\ ';
2315: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2316: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2317: if ($rowspan ne "^") {
2318: if (($rowspan <= 1) || ($rowspan eq '_')) {
2319: my $column = $jn+1;
2320: $output .= '\cline{'.$column.'-'.$column.'} ';
2321: }
2322: }
2323: }
2324:
2325: } else {
2326: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2327: }
2328: }
2329: # Note that \newline destroys alignment env's produced by e.g. <div>
2330: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2331: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2332: if ($#Apache::londefdef::table > 0) {
2333: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2334: # Figure out max/and min width by summing us and then
2335: # apply that to the current column of the table we nest in
2336: # if it's larger than the current width or the current width
2337: # is undefined.
2338: #
2339: my $min_nested_width = 0;
2340: my $max_nested_width = 0;
2341: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2342: $min_nested_width += $min_len[$col];
2343: $max_nested_width += $max_len[$col];
2344:
2345: }
2346: # Fudge in an extra 5 mm for borders etc:
2347:
2348: $min_nested_width += 5;
2349: $max_nested_width += 5;
2350:
2351: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2352: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2353: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2354: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2355: }
2356: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2357: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2358: }
2359:
2360: pop @Apache::londefdef::table;
2361: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2362: } else {
2363: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2364: pop @Apache::londefdef::table;
2365: undef @Apache::londefdef::table;
2366: }
2367: }
2368: return $currentstring;
2369: }
2370:
2371: #-- <tr> tag (end tag optional)
2372: sub start_tr {
2373: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2374: my $currentstring = '';
2375: if ($target eq 'web' || $target eq 'webgrade') {
2376: $currentstring = $token->[4];
2377: } elsif ($target eq 'tex') {
2378: $Apache::londefdef::table[-1]{'row_number'}++;
2379: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2380: if ($alignchar ne '') {
2381: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2382: } else {
2383: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2384: }
2385: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2386: #
2387: # Need to save the number of table columns to preserve the max # columns.
2388: #
2389: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2390: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2391: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2392: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2393: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2394: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2395: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2396: }
2397: return $currentstring;
2398: }
2399:
2400: sub end_tr {
2401: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2402: my $currentstring = &end_p(); # Close any pending <p> in the row.
2403: if ($target eq 'web' || $target eq 'webgrade') {
2404: $currentstring .= $token->[2];
2405: } elsif ($target eq 'tex') {
2406: if ($Apache::londefdef::TD_redirection) {
2407: &end_td_tex($parstack,$parser,$safeeval);
2408: }
2409: # Counter columns must be the maximum number of columns seen
2410: # in the table so far so:
2411: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2412: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2413: }
2414:
2415:
2416:
2417: }
2418: return $currentstring;
2419: }
2420:
2421: #-- <td> tag (end tag optional)
2422: sub start_td {
2423: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2424: my $currentstring = '';
2425: if ($target eq 'web' || $target eq 'webgrade') {
2426: $currentstring = $token->[4];
2427: } elsif ($target eq 'tex') {
2428: $Apache::londefdef::TD_redirection = 1;
2429: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2430: }
2431: return $currentstring;
2432: }
2433:
2434: sub tag_check {
2435: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2436: my @ar=@$parstack;
2437: for (my $i=$#ar-1;$i>=0;$i--) {
2438: if (lc($$tagstack[$i]) eq $good_tag) {
2439: &start_td_tex($parstack,$parser,$safeeval);
2440: last;
2441: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2442: splice @ar, $i+1;
2443: &end_td_tex(\@ar,$parser,$safeeval);
2444: &start_td_tex($parstack,$parser,$safeeval);
2445: last;
2446: }
2447: }
2448: return '';
2449: }
2450:
2451: sub start_td_tex {
2452: my ($parstack,$parser,$safeeval) = @_;
2453: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2454: if ($alignchar eq '') {
2455: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2456: }
2457: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2458: $Apache::londefdef::table[-1]{'counter_columns'}++;
2459: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2460: if (defined $TeXwidth) {
2461: my $current_length=&recalc($TeXwidth);
2462: $current_length=~/(\d+\.?\d*)/;
2463: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2464: }
2465: &Apache::lonxml::startredirection();
2466: return '';
2467: }
2468:
2469: sub end_td_tex {
2470: my ($parstack,$parser,$safeeval) = @_;
2471: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2472: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2473: my $data = &Apache::lonxml::endredirection();
2474:
2475: # The rowspan array of the table indicates which cells are part of a span.
2476: # n indicates the start of a span set of n rows.
2477: # ^ indicates a cell that continues a span set.
2478: # _ indicates the cell is at the bottom of a span set.
2479: # If this and subsequent cells are part of a rowspan, we must
2480: # push along the row until we find one that is not.
2481:
2482: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2483: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2484: # Part of a span.
2485: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2486: $current_column++;
2487: }
2488: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2489:
2490:
2491: # Get the column and row spans.
2492: # Colspan can be done via \multicolumn if I can figure out the data structs.
2493:
2494: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2495: if (!$colspan) {
2496: $colspan = 1;
2497: }
2498:
2499: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2500: if (!$rowspan) {
2501: $rowspan = 1;
2502: }
2503:
2504:
2505:
2506: for (my $c = 0; $c < $colspan; $c++) {
2507: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2508: for (my $i = 1; $i < $rowspan; $i++) {
2509: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2510: if ($i == ($rowspan-1)) {
2511: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2512: }
2513: }
2514: }
2515:
2516: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2517: if (defined $TeXwidth) {
2518: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2519: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2520: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2521: } else {
2522: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2523: my $garbage_data=$data;
2524: my $fwidth=0;
2525: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2526: my $current_length=&recalc($1);
2527: $current_length=~/(\d+\.?\d*)/;
2528: if ($fwidth<$1) {$fwidth=$1;}
2529: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2530: }
2531: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2532: my $current_length=$1;
2533: if ($fwidth<$current_length) {$fwidth=$current_length;}
2534: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2535: }
2536: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2537: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2538: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2539: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2540: } elsif ($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)*/) {
2541: my $garbage_data=$data;
2542: my $fwidth=0;
2543: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2544: my $current_length=&recalc($1);
2545: $current_length=~/(\d+\.?\d*)/;
2546: if ($fwidth<$1) {$fwidth=$1;}
2547: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2548: }
2549: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2550: my $current_length=&recalc($1);
2551: $current_length=~/(\d+\.?\d*)/;
2552: if ($fwidth<$1) {$fwidth=$1;}
2553: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2554: }
2555: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2556: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2557: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2558: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2559: $data=~s/\\\\\s*$//;
2560: } else {
2561: $data=~s/^\s+(\S.*)/$1/;
2562: $data=~s/(.*\S)\s+$/$1/;
2563: $data=~s/(\s)+/$1/;
2564: my ($current_length,$min_length)=(0,0);
2565: if ($data=~/\\vskip/) {
2566: my $newdata=$data;
2567: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2568: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2569: foreach my $elementdata (@newdata) {
2570: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2571: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2572: my @words=split(/ /,$elementdata);
2573: foreach my $word (@words) {
2574: my $lengthword=2.5*&LATEX_length($word);
2575: if ($min_length<$lengthword) {$min_length=$lengthword;}
2576: }
2577: }
2578: } else {
2579: $current_length=2.5*&LATEX_length($data);
2580: my @words=split(/ /,$data);
2581: foreach my $word (@words) {
2582: my $lengthword=2*&LATEX_length($word);
2583: if ($min_length<$lengthword) {$min_length=$lengthword;}
2584: }
2585: }
2586: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2587: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2588: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2589: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2590: }
2591: }
2592: # Substitute all of the tables nested in this cell in their appropriate places.
2593:
2594:
2595: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2596: for (my $in=0; $in<=$nested_count; $in++) {
2597: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2598: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2599: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2600: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2601:
2602: }
2603: # Should be be killing off the 'include' elements as they're used up?
2604:
2605: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2606:
2607:
2608:
2609:
2610: # the colspan array will indicate how many columns will be spanned by this
2611: # cell..this requires that counter_columns also be adjusted accordingly
2612: # so that the next bunch of text goes in the right cell. Note that since
2613: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2614: #
2615:
2616: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2617: for (my $i = 0; $i < ($colspan -1); $i++) {
2618: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2619: }
2620: for (my $r = 0; $r < $rowspan; $r++) {
2621: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2622: # Put empty text in spanned cols.
2623:
2624: }
2625:
2626:
2627:
2628: return '';
2629: }
2630:
2631: sub end_td {
2632: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2633: my $currentstring = '';
2634: if ($target eq 'web' || $target eq 'webgrade') {
2635: $currentstring = $token->[2];
2636: } elsif ($target eq 'tex') {
2637: $Apache::londefdef::TD_redirection =0;
2638: &end_td_tex($parstack,$parser,$safeeval);
2639: }
2640: return $currentstring;
2641: }
2642:
2643: #-- <th> tag (end tag optional)
2644: sub start_th {
2645: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2646: my $currentstring = '';
2647: if ($target eq 'web' || $target eq 'webgrade') {
2648: $currentstring = $token->[4];
2649: } elsif ($target eq 'tex') {
2650: $Apache::londefdef::TD_redirection = 1;
2651: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2652: }
2653: return $currentstring;
2654: }
2655:
2656: sub tagg_check {
2657: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2658: my @ar=@$parstack;
2659: for (my $i=$#ar-1;$i>=0;$i--) {
2660: if (lc($$tagstack[$i]) eq $good_tag) {
2661: &start_th_tex($parstack,$parser,$safeeval);
2662: last;
2663: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2664: splice @ar, $i+1;
2665: &end_th_tex(\@ar,$parser,$safeeval);
2666: &start_th_tex($parstack,$parser,$safeeval);
2667: last;
2668: }
2669: }
2670: return '';
2671: }
2672:
2673: sub start_th_tex {
2674: my ($parstack,$parser,$safeeval) = @_;
2675: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2676: if ($alignchar eq '') {
2677: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2678: }
2679: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2680: $Apache::londefdef::table[-1]{'counter_columns'}++;
2681: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2682: if (defined $TeXwidth) {
2683: my $current_length=&recalc($TeXwidth);
2684: $current_length=~/(\d+\.?\d*)/;
2685: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2686: }
2687: &Apache::lonxml::startredirection();
2688: return '';
2689: }
2690:
2691: sub end_th_tex {
2692: my ($parstack,$parser,$safeeval) = @_;
2693: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2694: my $data=&Apache::lonxml::endredirection();
2695: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2696: if (defined $TeXwidth) {
2697: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2698: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2699: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2700: } else {
2701: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2702: my $garbage_data=$data;
2703: my $fwidth=0;
2704: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2705: my $current_length=&recalc($1);
2706: $current_length=~/(\d+\.?\d*)/;
2707: if ($fwidth<$1) {$fwidth=$1;}
2708: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2709: }
2710: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2711: my $current_length=$1;
2712: if ($fwidth<$current_length) {$fwidth=$current_length;}
2713: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2714: }
2715: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2716: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2717: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2718: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2719: } else {
2720: $data=~s/^\s+(\S.*)/$1/;
2721: $data=~s/(.*\S)\s+$/$1/;
2722: $data=~s/(\s)+/$1/;
2723: my ($current_length,$min_length)=(0,0);
2724: if ($data=~/\\vskip/) {
2725: my $newdata=$data;
2726: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2727: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2728: foreach my $elementdata (@newdata) {
2729: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2730: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2731: my @words=split(/ /,$elementdata);
2732: foreach my $word (@words) {
2733: my $lengthword=2.5*&LATEX_length($word);
2734: if ($min_length<$lengthword) {$min_length=$lengthword;}
2735: }
2736: }
2737: } else {
2738: $current_length=2.5*&LATEX_length($data);
2739: my @words=split(/ /,$data);
2740: foreach my $word (@words) {
2741: my $lengthword=2*&LATEX_length($word);
2742: if ($min_length<$lengthword) {$min_length=$lengthword;}
2743: }
2744: }
2745: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2746: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2747: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2748: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2749: }
2750: }
2751: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2752: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2753: }
2754: #make data bold
2755: $data='\textbf{'.$data.'}';
2756: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2757: return'';
2758: }
2759:
2760: sub end_th {
2761: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2762: my $currentstring = &end_p(); # Close any open <p> in the row.
2763: if ($target eq 'web' || $target eq 'webgrade') {
2764: $currentstring .= $token->[2];
2765: } elsif ($target eq 'tex') {
2766: $Apache::londefdef::TD_redirection =0;
2767: &end_th_tex($parstack,$parser,$safeeval);
2768: }
2769: return $currentstring;
2770: }
2771:
2772: #-- <img> tag (end tag forbidden)
2773: #
2774: # Render the <IMG> tag.
2775: # <IMG> has the following attributes (in addition to the
2776: # standard HTML ones:
2777: # TeXwrap - Governs how the tex target will try to wrap text around
2778: # horizontally aligned images.
2779: # TeXwidth - The width of the image when rendered for print (mm).
2780: # TeXheight - The height of the image when rendered for print (mm)
2781: # (Note there seems to also be support for this as a % of page size)
2782: #
2783: sub start_img {
2784: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2785: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2786: undef,1);
2787: if (! $src &&
2788: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2789: ) {
2790: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2791: return '';
2792: }
2793: &Apache::lonxml::extlink($src);
2794: my $currentstring = '';
2795: my $scaling = .3;
2796:
2797: # Render unto browsers that which are the browser's...
2798:
2799: if ($target eq 'web' || $target eq 'webgrade') {
2800: if ($env{'browser.imagesuppress'} ne 'on') {
2801: my $enc = ('yes' eq
2802: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2803: $safeeval)));
2804: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2805: $enc);
2806: } else {
2807: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2808: undef,1);
2809: if (!$alttag) {
2810: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2811: $src);
2812: }
2813: $currentstring.='[IMAGE: '.$alttag.']';
2814: }
2815:
2816: # and render unto TeX that which is LaTeX
2817:
2818: } elsif ($target eq 'tex') {
2819: #
2820: # The alignment will require some superstructure to be put around
2821: # the \includegraphics stuff. At present we can only partially
2822: # simulate the alignments offered by html.
2823: #
2824: #
2825: my $align = lc(&Apache::lonxml::get_param('align',
2826: $parstack,
2827: $safeeval,
2828: undef,1));
2829: if(!$align) {
2830: $align = "bottom"; # This is html's default so it's ours too.
2831: }
2832: #
2833: &Apache::lonxml::debug("Alignemnt = $align");
2834: # LaTeX's image/text wrapping is really bad since it wants to
2835: # make figures float.
2836: # The user has the optional parameter (applicable only to l/r
2837: # alignment to use the picins/parpic directive to get wrapped text
2838: # this is also imperfect.. that's why we give them a choice...
2839: # so they can't yell at us for our choice.
2840: #
2841: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2842: $parstack,
2843: $safeeval,
2844: undef,0);
2845: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2846: if(!$latex_rendering) {
2847: $latex_rendering = "texwrap";
2848: }
2849: # using texwrap inside a table does not work. So, if after all of this,
2850: # texwrap is on, we turn it off if we detect we're in a table:
2851: #
2852: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2853: $latex_rendering = 'parpic';
2854: }
2855:
2856: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2857:
2858: #if original gif/jpg/png file exist do following:
2859: my $origsrc=$src;
2860: my ($path,$file) = &get_eps_image($src);
2861: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2862: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2863: &Apache::lonxml::debug("path = $path file = $file src = $src");
2864: if (-e $src) {
2865: &Apache::lonxml::debug("$src exists");
2866: my ($height_param,$width_param)=
2867: &image_size($origsrc,0.3,$parstack,$safeeval);
2868: my $size;
2869: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2870: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2871: # Default size if not able to extract that (e.g. eps image).
2872:
2873: # &Apache::lonnet::logthis("Size = $size");
2874:
2875: $size='['.$size;
2876: $size=~s/,$/]/;
2877: $currentstring .= '\graphicspath{{'.$path.'}}'
2878: .'\includegraphics'.$size.'{'.$file.'} ';
2879:
2880: # If there's an alignment specification we need to honor it here.
2881: # For the horizontal alignments, we will also honor the
2882: # value of the latex specfication. The default is parbox,
2883: # and that's used for illegal values too.
2884: #
2885: # Even though we set a default alignment value, the user
2886: # could have given us an illegal value. In that case we
2887: # just use the default alignment of bottom..
2888: if ($align eq "top") {
2889: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2890: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2891: my $offset = $height_param/2;
2892: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2893: } elsif ($align eq "left") {
2894: if ($latex_rendering eq "parpic") {
2895: $currentstring = '\parpic[l]{'.$currentstring.'}';
2896: } elsif ($latex_rendering eq "parbox") {
2897: $currentstring = '\begin{minipage}[l]{'.$width_param.'mm}'
2898: .$currentstring.'\end{minipage}';
2899: } elsif ($latex_rendering eq "wrapfigure"
2900: || $latex_rendering ne 'none') { # wrapfig render
2901: $currentstring =
2902: '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2903: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2904: }
2905: } elsif ($align eq "right") {
2906: if ($latex_rendering eq "parpic") {
2907: $currentstring = '\parpic[r]{'.$currentstring.'}';
2908: } elsif ($latex_rendering eq "parbox") {
2909: $currentstring = '\begin{minipage}[r]{'.$width_param.'mm}'
2910: .$currentstring.'\end{minipage}';
2911: } elsif ($latex_rendering eq "wrapfigure"
2912: || $latex_rendering ne 'none') { # wrapfig render
2913: $currentstring =
2914: '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2915: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2916: }
2917: } else { # Bottom is also default.
2918: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2919: }
2920: } else {
2921: &Apache::lonxml::debug("$src does not exist");
2922: #original image file doesn't exist so check the alt attribute
2923: my $alt =
2924: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2925: unless ($alt) {
2926: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2927: }
2928:
2929: if ($alt) { $currentstring .= ' '.$alt.' '; }
2930: }
2931:
2932: # And here's where the semi-quote breaks down: allow the user
2933: # to edit the beast as well by rendering the problem for edit:
2934: } elsif ($target eq 'edit') {
2935: $currentstring .=&Apache::edit::tag_start($target,$token);
2936: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2937: &Apache::edit::browse('src',undef,'alt').' '.
2938: &Apache::edit::search('src',undef,'alt').'<br />';
2939: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2940: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2941: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2942: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2943: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2944: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2945: ['','bottom','middle','top','left','right'],$token,5);
2946: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2947: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
2948: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2949: ['no','yes'], $token, 2);
2950: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2951: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2952: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2953: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2954: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2955:
2956:
2957: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2958: if ($width) { $currentstring.=' width="'.$width.'" '; }
2959: if ($height) { $currentstring.=' height="'.$height.'" '; }
2960: $currentstring .= ' />';
2961: } elsif ($target eq 'modified') {
2962: my ($osrc,$owidth,$oheight)=
2963: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2964: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2965: $safeeval,'src','alt','align',
2966: 'TeXwidth','TeXheight', 'TeXwrap',
2967: 'width','height','encrypturl');
2968: my ($nsrc,$nwidth,$nheight)=
2969: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2970: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2971: &image_replication($loc);
2972: my ($iwidth,$iheight);
2973: if (-e $loc) {
2974: my $image = Image::Magick->new;
2975: $image->Read($loc);
2976: ($iwidth, $iheight) = ($image->Get('width'),
2977: $image->Get('height'));
2978: }
2979: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2980: # changed image or no size specified,
2981: # if they didn't explicitly change the
2982: # width or height use the ones from the image
2983: if ($iwidth && $iheight) {
2984: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2985: $token->[2]{'width'} = $iwidth;$ctag=1;
2986: }
2987: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2988: $token->[2]{'height'}=$iheight;$ctag=1;
2989: }
2990: }
2991: }
2992: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2993: # if we don't have a width or height
2994: if ($iwidth && $cwidth && !$cheight) {
2995: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2996: }
2997: if ($iheight && $cheight && !$cwidth) {
2998: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2999: }
3000: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3001: }
3002:
3003: return $currentstring;
3004: }
3005:
3006: sub end_img {
3007: my ($target,$token) = @_;
3008: my $currentstring = '';
3009: if ($target eq 'web' || $target eq 'webgrade') {
3010: $currentstring = $token->[2];
3011: } elsif ($target eq 'tex') {
3012: $currentstring = '';
3013: }
3014: return $currentstring;
3015: }
3016:
3017: #-- <applet> tag (end tag required)
3018: sub start_applet {
3019: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3020:
3021: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3022: &Apache::lonxml::extlink($code);
3023: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3024: undef,1);
3025: &Apache::lonxml::extlink($archive);
3026: my $currentstring = '';
3027: if ($target eq 'web' || $target eq 'webgrade') {
3028: if ($env{'browser.appletsuppress'} ne 'on') {
3029: $currentstring = &Apache::lonenc::encrypt_ref($token,
3030: {'code'=>$code,
3031: 'archive'=>$archive}
3032: );
3033: } else {
3034: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3035: $safeeval,undef,1);
3036: unless ($alttag) {
3037: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3038: $code);
3039: }
3040: $currentstring='[APPLET: '.$alttag.']';
3041: }
3042: } elsif ($target eq 'tex') {
3043: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3044: $safeeval,undef,1);
3045: unless ($alttag) {
3046: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3047: undef,1);
3048: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3049: $code);
3050: }
3051: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3052: '.}\end{center}';
3053: }
3054: return $currentstring;
3055: }
3056:
3057: sub end_applet {
3058: my ($target,$token) = @_;
3059: my $currentstring = '';
3060: if ($target eq 'web' || $target eq 'webgrade') {
3061: $currentstring = $token->[2];
3062: } elsif ($target eq 'tex') {
3063: }
3064: return $currentstring;
3065: }
3066:
3067: #-- <embed> tag (end tag optional/required)
3068: sub start_embed {
3069: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3070: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3071: &Apache::lonxml::extlink($src);
3072: my $currentstring = '';
3073: if ($target eq 'web' || $target eq 'webgrade') {
3074: if ($env{'browser.embedsuppress'} ne 'on') {
3075: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3076: } else {
3077: my $alttag=&Apache::lonxml::get_param
3078: ('alt',$parstack,$safeeval,undef,1);
3079: unless ($alttag) {
3080: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3081: }
3082: $currentstring='[EMBED: '.$alttag.']';
3083: }
3084: } elsif ($target eq 'tex') {
3085: }
3086: return $currentstring;
3087: }
3088:
3089: sub end_embed {
3090: my ($target,$token) = @_;
3091: my $currentstring = '';
3092: if ($target eq 'web' || $target eq 'webgrade') {
3093: $currentstring = $token->[2];
3094: } elsif ($target eq 'tex') {
3095: }
3096: return $currentstring;
3097: }
3098:
3099: #-- <param> tag (end tag forbidden)
3100: sub start_param {
3101: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3102: if (&Apache::lonxml::get_param('name',$parstack,
3103: $safeeval,undef,1)=~/^cabbase$/i) {
3104: my $value=&Apache::lonxml::get_param('value',$parstack,
3105: $safeeval,undef,1);
3106: &Apache::lonxml::extlink($value);
3107: }
3108:
3109: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3110: &Apache::lonxml::extlink($src);
3111: my $currentstring = '';
3112: if ($target eq 'web' || $target eq 'webgrade') {
3113: my %toconvert;
3114: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3115: if ($src) { $toconvert{'src'}= $src; }
3116: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3117: undef,1);
3118: if ($name=~/^cabbase$/i) {
3119: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3120: $safeeval,undef,1);
3121: }
3122: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3123: } elsif ($target eq 'tex') {
3124: }
3125: return $currentstring;
3126: }
3127:
3128: sub end_param {
3129: my ($target,$token) = @_;
3130: my $currentstring = '';
3131: if ($target eq 'web' || $target eq 'webgrade') {
3132: $currentstring = $token->[2];
3133: } elsif ($target eq 'tex') {
3134: }
3135: return $currentstring;
3136: }
3137:
3138: #-- <allow> tag
3139: sub start_allow {
3140: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3141: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3142: &Apache::lonxml::extlink($src);
3143:
3144: if ($target eq 'tex') { &image_replication($src); }
3145: my $result;
3146: if ($target eq 'edit') {
3147: $result .=&Apache::edit::tag_start($target,$token);
3148: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3149: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3150: } elsif ($target eq 'modified') {
3151: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3152: $safeeval,'src');
3153: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3154: }
3155: return $result;
3156: }
3157:
3158: sub end_allow {
3159: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3160: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3161: return '';
3162: }
3163:
3164: #-- Frames (end tag required)
3165: #-- <frameset>
3166: sub start_frameset {
3167: my ($target,$token) = @_;
3168: my $currentstring = ''; # Close any pending para.
3169: if ($target eq 'web' || $target eq 'webgrade') {
3170: $currentstring =
3171: &Apache::loncommon::start_page($Apache::londefdef::title,
3172: $Apache::londefdef::head,
3173: {'add_entries' => $token->[2],
3174: 'no_title' => 1,
3175: 'force_register' => 1,
3176: 'frameset' => 1,});
3177:
3178: }
3179: return $currentstring;
3180: }
3181:
3182: sub end_frameset {
3183: my ($target,$token) = @_;
3184: my $currentstring = '';
3185: if ($target eq 'web' || $target eq 'webgrade') {
3186: $currentstring = $token->[2];
3187: }
3188: return $currentstring;
3189: }
3190:
3191: #-- <xmp> (end tag required)
3192: sub start_xmp {
3193: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3194: my $currentstring = '';
3195: if ($target eq 'web' || $target eq 'webgrade') {
3196: $currentstring .= $token->[4];
3197: } elsif ($target eq 'tex') {
3198: $currentstring .= '\begin{verbatim}';
3199: }
3200: return $currentstring;
3201: }
3202:
3203: sub end_xmp {
3204: my ($target,$token) = @_;
3205: my $currentstring = '';
3206: if ($target eq 'web' || $target eq 'webgrade') {
3207: $currentstring .= $token->[2];
3208: } elsif ($target eq 'tex') {
3209: $currentstring .= '\end{verbatim}';
3210: }
3211: return $currentstring;
3212: }
3213:
3214: #-- <pre> (end tag required)
3215: sub start_pre {
3216: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3217: my $currentstring = &end_p(); # close off pending <p>
3218: if ($target eq 'web' || $target eq 'webgrade') {
3219: $currentstring .= $token->[4];
3220: } elsif ($target eq 'tex') {
3221: $currentstring .= '\begin{verbatim}';
3222: &Apache::lonxml::disable_LaTeX_substitutions();
3223: }
3224: return $currentstring;
3225: }
3226:
3227: sub end_pre {
3228: my ($target,$token) = @_;
3229: my $currentstring = '';
3230: if ($target eq 'web' || $target eq 'webgrade') {
3231: $currentstring .= $token->[2];
3232: } elsif ($target eq 'tex') {
3233: $currentstring .= '\end{verbatim}';
3234: &Apache::lonxml::enable_LaTeX_substitutions();
3235: }
3236: return $currentstring;
3237: }
3238:
3239: #-- <insert>
3240: sub start_insert {
3241: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3242: my $currentstring = '';
3243: if ($target eq 'web' || $target eq 'webgrade') {
3244: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3245: $currentstring .= '<b>'.$display.'</b>';;
3246: }
3247: return $currentstring;
3248: }
3249:
3250: sub end_insert {
3251: my ($target,$token) = @_;
3252: my $currentstring = '';
3253: if ($target eq 'web' || $target eq 'webgrade') {
3254: $currentstring .= '';
3255: }
3256: return $currentstring;
3257: }
3258:
3259: #-- <externallink>
3260: sub start_externallink {
3261: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3262: my $currentstring = '';
3263: if ($target eq 'web' || $target eq 'webgrade') {
3264: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3265: $currentstring .= '<b>'.$display.'</b>';;
3266: }
3267: return $currentstring;
3268: }
3269:
3270: sub end_externallink {
3271: my ($target,$token) = @_;
3272: my $currentstring = '';
3273: if ($target eq 'web' || $target eq 'webgrade') {
3274: $currentstring .= '';
3275: }
3276: return $currentstring;
3277: }
3278:
3279: #-- <blankspace heigth="">
3280: sub start_blankspace {
3281: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3282: my $currentstring = &end_p(); # closes off any unclosed <p>
3283: if ($target eq 'tex') {
3284: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3285: $currentstring .= '\vskip '.$howmuch.' ';
3286: }
3287: return $currentstring;
3288: }
3289:
3290: sub end_blankspace {
3291: my ($target,$token) = @_;
3292: my $currentstring = '';
3293: if ($target eq 'tex') {
3294: $currentstring .= '';
3295: }
3296: return $currentstring;
3297: }
3298:
3299: #-- <abbr> tag (end tag required)
3300: sub start_abbr {
3301: my ($target,$token) = @_;
3302: my $currentstring = '';
3303: if ($target eq 'web' || $target eq 'webgrade') {
3304: $currentstring = $token->[4];
3305: }
3306: return $currentstring;
3307: }
3308:
3309: sub end_abbr {
3310: my ($target,$token) = @_;
3311: my $currentstring = '';
3312: if ($target eq 'web' || $target eq 'webgrade') {
3313: $currentstring = $token->[2];
3314: }
3315: return $currentstring;
3316: }
3317:
3318: #-- <acronym> tag (end tag required)
3319: sub start_acronym {
3320: my ($target,$token) = @_;
3321: my $currentstring = '';
3322: if ($target eq 'web' || $target eq 'webgrade') {
3323: $currentstring = $token->[4];
3324: }
3325: return $currentstring;
3326: }
3327:
3328: sub end_acronym {
3329: my ($target,$token) = @_;
3330: my $currentstring = '';
3331: if ($target eq 'web' || $target eq 'webgrade') {
3332: $currentstring = $token->[2];
3333: }
3334: return $currentstring;
3335: }
3336:
3337: #-- <area> tag (end tag forbidden)
3338: sub start_area {
3339: my ($target,$token) = @_;
3340: my $currentstring = '';
3341: if ($target eq 'web' || $target eq 'webgrade') {
3342: $currentstring = $token->[4];
3343: }
3344: return $currentstring;
3345: }
3346:
3347: sub end_area {
3348: my ($target,$token) = @_;
3349: my $currentstring = '';
3350: if ($target eq 'web' || $target eq 'webgrade') {
3351: $currentstring = $token->[2];
3352: }
3353: return $currentstring;
3354: }
3355:
3356: #-- <base> tag (end tag forbidden)
3357: sub start_base {
3358: my ($target,$token) = @_;
3359: my $currentstring = '';
3360: if ($target eq 'web' || $target eq 'webgrade') {
3361: $currentstring = $token->[4];
3362: }
3363: return $currentstring;
3364: }
3365:
3366: sub end_base {
3367: my ($target,$token) = @_;
3368: my $currentstring = '';
3369: if ($target eq 'web' || $target eq 'webgrade') {
3370: $currentstring = $token->[2];
3371: }
3372: return $currentstring;
3373: }
3374:
3375: #-- <bdo> tag (end tag required)
3376: sub start_bdo {
3377: my ($target,$token) = @_;
3378: my $currentstring = '';
3379: if ($target eq 'web' || $target eq 'webgrade') {
3380: $currentstring = $token->[4];
3381: }
3382: return $currentstring;
3383: }
3384:
3385: sub end_bdo {
3386: my ($target,$token) = @_;
3387: my $currentstring = '';
3388: if ($target eq 'web' || $target eq 'webgrade') {
3389: $currentstring = $token->[2];
3390: }
3391: return $currentstring;
3392: }
3393:
3394: #-- <bgsound> tag (end tag optional)
3395: sub start_bgsound {
3396: my ($target,$token) = @_;
3397: my $currentstring = '';
3398: if ($target eq 'web' || $target eq 'webgrade') {
3399: $currentstring = $token->[4];
3400: }
3401: return $currentstring;
3402: }
3403:
3404: sub end_bgsound {
3405: my ($target,$token) = @_;
3406: my $currentstring = '';
3407: if ($target eq 'web' || $target eq 'webgrade') {
3408: $currentstring = $token->[2];
3409: }
3410: return $currentstring;
3411: }
3412:
3413: #-- <blink> tag (end tag required)
3414: sub start_blink {
3415: my ($target,$token) = @_;
3416: my $currentstring = '';
3417: if ($target eq 'web' || $target eq 'webgrade') {
3418: $currentstring = $token->[4];
3419: }
3420: return $currentstring;
3421: }
3422:
3423: sub end_blink {
3424: my ($target,$token) = @_;
3425: my $currentstring = '';
3426: if ($target eq 'web' || $target eq 'webgrade') {
3427: $currentstring = $token->[2];
3428: }
3429: return $currentstring;
3430: }
3431:
3432: #-- <blockquote> tag (end tag required)
3433: sub start_blockquote {
3434: my ($target,$token) = @_;
3435: my $currentstring = &end_p(); # Close any unclosed <p>
3436: if ($target eq 'web' || $target eq 'webgrade') {
3437: $currentstring .= $token->[4];
3438: }
3439: if ($target eq 'tex') {
3440: $currentstring .= '\begin{quote}';
3441: }
3442: return $currentstring;
3443: }
3444:
3445: sub end_blockquote {
3446: my ($target,$token) = @_;
3447: my $currentstring = '';
3448: if ($target eq 'web' || $target eq 'webgrade') {
3449: $currentstring = $token->[2];
3450: }
3451: if ($target eq 'tex') {
3452: $currentstring = '\end{quote}';
3453: }
3454: return $currentstring;
3455: }
3456:
3457: #-- <button> tag (end tag required)
3458: sub start_button {
3459: my ($target,$token) = @_;
3460: my $currentstring = '';
3461: if ($target eq 'web' || $target eq 'webgrade') {
3462: $currentstring = $token->[4];
3463: }
3464: return $currentstring;
3465: }
3466:
3467: sub end_button {
3468: my ($target,$token) = @_;
3469: my $currentstring = '';
3470: if ($target eq 'web' || $target eq 'webgrade') {
3471: $currentstring = $token->[2];
3472: }
3473: return $currentstring;
3474: }
3475:
3476: #-- <caption> tag (end tag required)
3477: sub start_caption {
3478: my ($target,$token) = @_;
3479: my $currentstring = '';
3480: if ($target eq 'web' || $target eq 'webgrade') {
3481: $currentstring = $token->[4];
3482: }
3483: return $currentstring;
3484: }
3485:
3486: sub end_caption {
3487: my ($target,$token) = @_;
3488: my $currentstring = '';
3489: if ($target eq 'web' || $target eq 'webgrade') {
3490: $currentstring = $token->[2];
3491: }
3492: return $currentstring;
3493: }
3494:
3495: #-- <col> tag (end tag forbdden)
3496: sub start_col {
3497: my ($target,$token) = @_;
3498: my $currentstring = '';
3499: if ($target eq 'web' || $target eq 'webgrade') {
3500: $currentstring = $token->[4];
3501: }
3502: return $currentstring;
3503: }
3504:
3505: sub end_col {
3506: my ($target,$token) = @_;
3507: my $currentstring = '';
3508: if ($target eq 'web' || $target eq 'webgrade') {
3509: $currentstring = $token->[2];
3510: }
3511: return $currentstring;
3512: }
3513:
3514: #-- <colgroup> tag (end tag optional)
3515: sub start_colgroup {
3516: my ($target,$token) = @_;
3517: my $currentstring = '';
3518: if ($target eq 'web' || $target eq 'webgrade') {
3519: $currentstring = $token->[4];
3520: }
3521: return $currentstring;
3522: }
3523:
3524: sub end_colgroup {
3525: my ($target,$token) = @_;
3526: my $currentstring = '';
3527: if ($target eq 'web' || $target eq 'webgrade') {
3528: $currentstring = $token->[2];
3529: }
3530: return $currentstring;
3531: }
3532:
3533: #-- <del> tag (end tag required)
3534: sub start_del {
3535: my ($target,$token) = @_;
3536: my $currentstring = '';
3537: if ($target eq 'web' || $target eq 'webgrade') {
3538: $currentstring = $token->[4];
3539: }
3540: return $currentstring;
3541: }
3542:
3543: sub end_del {
3544: my ($target,$token) = @_;
3545: my $currentstring = '';
3546: if ($target eq 'web' || $target eq 'webgrade') {
3547: $currentstring = $token->[2];
3548: }
3549: return $currentstring;
3550: }
3551:
3552: #-- <fieldset> tag (end tag required)
3553: sub start_fieldset {
3554: my ($target,$token) = @_;
3555: my $currentstring = '';
3556: if ($target eq 'web' || $target eq 'webgrade') {
3557: $currentstring = $token->[4];
3558: }
3559: return $currentstring;
3560: }
3561:
3562: sub end_fieldset {
3563: my ($target,$token) = @_;
3564: my $currentstring = '';
3565: if ($target eq 'web' || $target eq 'webgrade') {
3566: $currentstring = $token->[2];
3567: }
3568: return $currentstring;
3569: }
3570:
3571: #-- <frame> tag (end tag forbidden)
3572: sub start_frame {
3573: my ($target,$token) = @_;
3574: my $currentstring = '';
3575: if ($target eq 'web' || $target eq 'webgrade') {
3576: $currentstring = $token->[4];
3577: }
3578: return $currentstring;
3579: }
3580:
3581: sub end_frame {
3582: my ($target,$token) = @_;
3583: my $currentstring = '';
3584: if ($target eq 'web' || $target eq 'webgrade') {
3585: $currentstring = $token->[2];
3586: }
3587: return $currentstring;
3588: }
3589:
3590: #-- <iframe> tag (end tag required)
3591: sub start_iframe {
3592: my ($target,$token) = @_;
3593: my $currentstring = '';
3594: if ($target eq 'web' || $target eq 'webgrade') {
3595: $currentstring = $token->[4];
3596: }
3597: return $currentstring;
3598: }
3599:
3600: sub end_iframe {
3601: my ($target,$token) = @_;
3602: my $currentstring = '';
3603: if ($target eq 'web' || $target eq 'webgrade') {
3604: $currentstring = $token->[2];
3605: }
3606: return $currentstring;
3607: }
3608:
3609: #-- <ins> tag (end tag required)
3610: sub start_ins {
3611: my ($target,$token) = @_;
3612: my $currentstring = '';
3613: if ($target eq 'web' || $target eq 'webgrade') {
3614: $currentstring = $token->[4];
3615: }
3616: return $currentstring;
3617: }
3618:
3619: sub end_ins {
3620: my ($target,$token) = @_;
3621: my $currentstring = '';
3622: if ($target eq 'web' || $target eq 'webgrade') {
3623: $currentstring = $token->[2];
3624: }
3625: return $currentstring;
3626: }
3627:
3628: #-- <isindex> tag (end tag forbidden)
3629: sub start_isindex {
3630: my ($target,$token) = @_;
3631: my $currentstring = '';
3632: if ($target eq 'web' || $target eq 'webgrade') {
3633: $currentstring = $token->[4];
3634: }
3635: return $currentstring;
3636: }
3637:
3638: sub end_isindex {
3639: my ($target,$token) = @_;
3640: my $currentstring = '';
3641: if ($target eq 'web' || $target eq 'webgrade') {
3642: $currentstring = $token->[2];
3643: }
3644: return $currentstring;
3645: }
3646:
3647: #-- <keygen> tag (end tag forbidden)
3648: sub start_keygen {
3649: my ($target,$token) = @_;
3650: my $currentstring = '';
3651: if ($target eq 'web' || $target eq 'webgrade') {
3652: $currentstring = $token->[4];
3653: }
3654: return $currentstring;
3655: }
3656:
3657: sub end_keygen {
3658: my ($target,$token) = @_;
3659: my $currentstring = '';
3660: if ($target eq 'web' || $target eq 'webgrade') {
3661: $currentstring = $token->[2];
3662: }
3663: return $currentstring;
3664: }
3665:
3666: #-- <label> tag
3667: sub start_label {
3668: my ($target,$token) = @_;
3669: my $currentstring = '';
3670: if ($target eq 'web' || $target eq 'webgrade') {
3671: $currentstring = $token->[4];
3672: }
3673: return $currentstring;
3674: }
3675:
3676: sub end_label {
3677: my ($target,$token) = @_;
3678: my $currentstring = '';
3679: if ($target eq 'web' || $target eq 'webgrade') {
3680: $currentstring = $token->[2];
3681: }
3682: return $currentstring;
3683: }
3684:
3685: #-- <layer> tag (end tag required)
3686: sub start_layer {
3687: my ($target,$token) = @_;
3688: my $currentstring = '';
3689: if ($target eq 'web' || $target eq 'webgrade') {
3690: $currentstring = $token->[4];
3691: }
3692: return $currentstring;
3693: }
3694:
3695: sub end_layer {
3696: my ($target,$token) = @_;
3697: my $currentstring = '';
3698: if ($target eq 'web' || $target eq 'webgrade') {
3699: $currentstring = $token->[2];
3700: }
3701: return $currentstring;
3702: }
3703:
3704: #-- <legend> tag (end tag required)
3705: sub start_legend {
3706: my ($target,$token) = @_;
3707: my $currentstring = '';
3708: if ($target eq 'web' || $target eq 'webgrade') {
3709: $currentstring = $token->[4];
3710: }
3711: return $currentstring;
3712: }
3713:
3714: sub end_legend {
3715: my ($target,$token) = @_;
3716: my $currentstring = '';
3717: if ($target eq 'web' || $target eq 'webgrade') {
3718: $currentstring = $token->[2];
3719: }
3720: return $currentstring;
3721: }
3722:
3723: #-- <link> tag (end tag forbidden)
3724: sub start_link {
3725: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3726: my $currentstring = '';
3727: if ($target eq 'web' || $target eq 'webgrade') {
3728: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3729: undef,1);
3730: &Apache::lonxml::extlink($href);
3731: $currentstring = $token->[4];
3732: }
3733: return $currentstring;
3734: }
3735:
3736: sub end_link {
3737: my ($target,$token) = @_;
3738: my $currentstring = '';
3739: if ($target eq 'web' || $target eq 'webgrade') {
3740: $currentstring = $token->[2];
3741: }
3742: return $currentstring;
3743: }
3744:
3745: #-- <marquee> tag (end tag optional)
3746: sub start_marquee {
3747: my ($target,$token) = @_;
3748: my $currentstring = '';
3749: if ($target eq 'web' || $target eq 'webgrade') {
3750: $currentstring = $token->[4];
3751: }
3752: return $currentstring;
3753: }
3754:
3755: sub end_marquee {
3756: my ($target,$token) = @_;
3757: my $currentstring = '';
3758: if ($target eq 'web' || $target eq 'webgrade') {
3759: $currentstring = $token->[2];
3760: }
3761: return $currentstring;
3762: }
3763:
3764: #-- <multicol> tag (end tag required)
3765: sub start_multicol {
3766: my ($target,$token) = @_;
3767: my $currentstring = &end_p(); # Close any pending <p>
3768: if ($target eq 'web' || $target eq 'webgrade') {
3769: $currentstring .= $token->[4];
3770: }
3771: return $currentstring;
3772: }
3773:
3774: sub end_multicol {
3775: my ($target,$token) = @_;
3776: my $currentstring = '';
3777: if ($target eq 'web' || $target eq 'webgrade') {
3778: $currentstring = $token->[2];
3779: }
3780: return $currentstring;
3781: }
3782:
3783: #-- <nobr> tag (end tag required)
3784: sub start_nobr {
3785: my ($target,$token) = @_;
3786: my $currentstring = '';
3787: if ($target eq 'web' || $target eq 'webgrade') {
3788: $currentstring = $token->[4];
3789: } elsif ($target eq 'tex') {
3790: $currentstring='\mbox{';
3791: }
3792: return $currentstring;
3793: }
3794:
3795: sub end_nobr {
3796: my ($target,$token) = @_;
3797: my $currentstring = '';
3798: if ($target eq 'web' || $target eq 'webgrade') {
3799: $currentstring = $token->[2];
3800: } elsif ($target eq 'tex') {
3801: $currentstring='}';
3802: }
3803: return $currentstring;
3804: }
3805:
3806: #-- <noembed> tag (end tag required)
3807: sub start_noembed {
3808: my ($target,$token) = @_;
3809: my $currentstring = '';
3810: if ($target eq 'web' || $target eq 'webgrade') {
3811: $currentstring = $token->[4];
3812: }
3813: return $currentstring;
3814: }
3815:
3816: sub end_noembed {
3817: my ($target,$token) = @_;
3818: my $currentstring = '';
3819: if ($target eq 'web' || $target eq 'webgrade') {
3820: $currentstring = $token->[2];
3821: }
3822: return $currentstring;
3823: }
3824:
3825: #-- <noframes> tag (end tag required)
3826: sub start_noframes {
3827: my ($target,$token) = @_;
3828: my $currentstring = '';
3829: if ($target eq 'web' || $target eq 'webgrade') {
3830: $currentstring = $token->[4];
3831: }
3832: return $currentstring;
3833: }
3834:
3835: sub end_noframes {
3836: my ($target,$token) = @_;
3837: my $currentstring = '';
3838: if ($target eq 'web' || $target eq 'webgrade') {
3839: $currentstring = $token->[2];
3840: }
3841: return $currentstring;
3842: }
3843:
3844: #-- <nolayer> tag (end tag required)
3845: sub start_nolayer {
3846: my ($target,$token) = @_;
3847: my $currentstring = '';
3848: if ($target eq 'web' || $target eq 'webgrade') {
3849: $currentstring = $token->[4];
3850: }
3851: return $currentstring;
3852: }
3853:
3854: sub end_nolayer {
3855: my ($target,$token) = @_;
3856: my $currentstring = '';
3857: if ($target eq 'web' || $target eq 'webgrade') {
3858: $currentstring = $token->[2];
3859: }
3860: return $currentstring;
3861: }
3862:
3863: #-- <noscript> tag (end tag required)
3864: sub start_noscript {
3865: my ($target,$token) = @_;
3866: my $currentstring = '';
3867: if ($target eq 'web' || $target eq 'webgrade') {
3868: $currentstring = $token->[4];
3869: }
3870: return $currentstring;
3871: }
3872:
3873: sub end_noscript {
3874: my ($target,$token) = @_;
3875: my $currentstring = '';
3876: if ($target eq 'web' || $target eq 'webgrade') {
3877: $currentstring = $token->[2];
3878: }
3879: return $currentstring;
3880: }
3881:
3882: #-- <object> tag (end tag required)
3883: sub start_object {
3884: my ($target,$token) = @_;
3885: my $currentstring = '';
3886: if ($target eq 'web' || $target eq 'webgrade') {
3887: $currentstring = $token->[4];
3888: }
3889: return $currentstring;
3890: }
3891:
3892: sub end_object {
3893: my ($target,$token) = @_;
3894: my $currentstring = '';
3895: if ($target eq 'web' || $target eq 'webgrade') {
3896: $currentstring = $token->[2];
3897: }
3898: return $currentstring;
3899: }
3900:
3901: #-- <optgroup> tag (end tag required)
3902: sub start_optgroup {
3903: my ($target,$token) = @_;
3904: my $currentstring = '';
3905: if ($target eq 'web' || $target eq 'webgrade') {
3906: $currentstring = $token->[4];
3907: }
3908: return $currentstring;
3909: }
3910:
3911: sub end_optgroup {
3912: my ($target,$token) = @_;
3913: my $currentstring = '';
3914: if ($target eq 'web' || $target eq 'webgrade') {
3915: $currentstring = $token->[2];
3916: }
3917: return $currentstring;
3918: }
3919:
3920: #-- <samp> tag (end tag required)
3921: sub start_samp {
3922: my ($target,$token) = @_;
3923: my $currentstring = '';
3924: if ($target eq 'web' || $target eq 'webgrade') {
3925: $currentstring = $token->[4];
3926: } elsif ($target eq 'tex') {
3927: $currentstring='\texttt{';
3928: }
3929: return $currentstring;
3930: }
3931:
3932: sub end_samp {
3933: my ($target,$token) = @_;
3934: my $currentstring = '';
3935: if ($target eq 'web' || $target eq 'webgrade') {
3936: $currentstring = $token->[2];
3937: } elsif ($target eq 'tex') {
3938: $currentstring='}';
3939: }
3940: return $currentstring;
3941: }
3942:
3943: #-- <server> tag
3944: sub start_server {
3945: my ($target,$token) = @_;
3946: my $currentstring = '';
3947: if ($target eq 'web' || $target eq 'webgrade') {
3948: $currentstring = $token->[4];
3949: }
3950: return $currentstring;
3951: }
3952:
3953: sub end_server {
3954: my ($target,$token) = @_;
3955: my $currentstring = '';
3956: if ($target eq 'web' || $target eq 'webgrade') {
3957: $currentstring = $token->[2];
3958: }
3959: return $currentstring;
3960: }
3961:
3962: #-- <spacer> tag (end tag forbidden)
3963: sub start_spacer {
3964: my ($target,$token) = @_;
3965: my $currentstring = &end_p(); # Close off any open <p> tag.
3966: if ($target eq 'web' || $target eq 'webgrade') {
3967: $currentstring .= $token->[4];
3968: }
3969: return $currentstring;
3970: }
3971:
3972: sub end_spacer {
3973: my ($target,$token) = @_;
3974: my $currentstring = '';
3975: if ($target eq 'web' || $target eq 'webgrade') {
3976: $currentstring = $token->[2];
3977: }
3978: return $currentstring;
3979: }
3980:
3981: #-- <span> tag (end tag required)
3982: sub start_span {
3983: my ($target,$token) = @_;
3984: my $currentstring = '';
3985: if ($target eq 'web' || $target eq 'webgrade') {
3986: $currentstring = $token->[4];
3987: }
3988: return $currentstring;
3989: }
3990:
3991: sub end_span {
3992: my ($target,$token) = @_;
3993: my $currentstring = '';
3994: if ($target eq 'web' || $target eq 'webgrade') {
3995: $currentstring = $token->[2];
3996: }
3997: return $currentstring;
3998: }
3999:
4000: #-- <tbody> tag (end tag optional)
4001: sub start_tbody {
4002: my ($target,$token) = @_;
4003: my $currentstring = '';
4004: if ($target eq 'web' || $target eq 'webgrade') {
4005: $currentstring = $token->[4];
4006: }
4007: return $currentstring;
4008: }
4009:
4010: sub end_tbody {
4011: my ($target,$token) = @_;
4012: my $currentstring = '';
4013: if ($target eq 'web' || $target eq 'webgrade') {
4014: $currentstring = $token->[2];
4015: }
4016: return $currentstring;
4017: }
4018:
4019: #-- <tfoot> tag (end tag optional)
4020: sub start_tfoot {
4021: my ($target,$token) = @_;
4022: my $currentstring = '';
4023: if ($target eq 'web' || $target eq 'webgrade') {
4024: $currentstring = $token->[4];
4025: }
4026: return $currentstring;
4027: }
4028:
4029: sub end_tfoot {
4030: my ($target,$token) = @_;
4031: my $currentstring = '';
4032: if ($target eq 'web' || $target eq 'webgrade') {
4033: $currentstring = $token->[2];
4034: }
4035: return $currentstring;
4036: }
4037:
4038: #-- <thead> tag (end tag optional)
4039: sub start_thead {
4040: my ($target,$token) = @_;
4041: my $currentstring = '';
4042: if ($target eq 'web' || $target eq 'webgrade') {
4043: $currentstring = $token->[4];
4044: }
4045: return $currentstring;
4046: }
4047:
4048: sub end_thead {
4049: my ($target,$token) = @_;
4050: my $currentstring = '';
4051: if ($target eq 'web' || $target eq 'webgrade') {
4052: $currentstring = $token->[2];
4053: }
4054: return $currentstring;
4055: }
4056:
4057: #-- <var> tag
4058: sub start_var {
4059: my ($target,$token) = @_;
4060: my $currentstring = '';
4061: if ($target eq 'web' || $target eq 'webgrade') {
4062: $currentstring = $token->[4];
4063: } elsif ($target eq 'tex') {
4064: $currentstring = '\textit{';
4065: }
4066: return $currentstring;
4067: }
4068:
4069: sub end_var {
4070: my ($target,$token) = @_;
4071: my $currentstring = '';
4072: if ($target eq 'web' || $target eq 'webgrade') {
4073: $currentstring = $token->[2];
4074: } elsif ($target eq 'tex') {
4075: $currentstring = '}';
4076: }
4077: return $currentstring;
4078: }
4079:
4080: #-- <wbr> tag (end tag forbidden)
4081: sub start_wbr {
4082: my ($target,$token) = @_;
4083: my $currentstring = '';
4084: if ($target eq 'web' || $target eq 'webgrade') {
4085: $currentstring = $token->[4];
4086: }
4087: return $currentstring;
4088: }
4089:
4090: sub end_wbr {
4091: my ($target,$token) = @_;
4092: my $currentstring = '';
4093: if ($target eq 'web' || $target eq 'webgrade') {
4094: $currentstring = $token->[2];
4095: }
4096: return $currentstring;
4097: }
4098:
4099: #-- <hideweboutput> tag
4100: sub start_hideweboutput {
4101: my ($target,$token) = @_;
4102: if ($target eq 'web' || $target eq 'webgrade') {
4103: &Apache::lonxml::startredirection();
4104: }
4105: return '';
4106: }
4107:
4108: sub end_hideweboutput {
4109: my ($target,$token) = @_;
4110: my $currentstring = '';
4111: if ($target eq 'web' || $target eq 'webgrade') {
4112: $currentstring = &Apache::lonxml::endredirection();
4113: }
4114: return '';
4115: }
4116:
4117:
4118: sub image_replication {
4119: my $src = shift;
4120: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4121: #replicates eps or ps
4122: my $epssrc = my $pssrc = $src;
4123: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4124: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4125: if (not -e $epssrc && not -e $pssrc) {
4126: my $result=&Apache::lonnet::repcopy($epssrc);
4127: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4128: }
4129: return '';
4130: }
4131: #
4132: # Get correct sizing parameter for an image given
4133: # it's initial ht. and wid. This allows sizing of
4134: # images that are generated on-the-fly (e.g. gnuplot)
4135: # as well as serving as a utility for image_size.
4136: #
4137: # Parameter:
4138: # height_param
4139: # width_param - Initial picture dimensions.
4140: # scaling - A scale factor.
4141: # parstack, - the current stack of tag attributes
4142: # from the xml parser
4143: # safeeval, - pointer to the safespace
4144: # depth, - from what level in the stack to look for attributes
4145: # (assumes -1 if unspecified)
4146: # cis - look for attrubutes case insensitively
4147: # (assumes false)
4148: #
4149: # Returns:
4150: # height, width - new dimensions.
4151: #
4152: sub resize_image {
4153: my ($height_param, $width_param, $scaling,
4154: $parstack, $safeeval, $depth, $cis) = @_;
4155:
4156: # First apply the scaling...
4157:
4158: $height_param = $height_param * $scaling;
4159: $width_param = $width_param * $scaling;
4160:
4161: #do we have any specified LaTeX size of the picture?
4162: my $toget='TeXwidth';
4163: if ($cis) {
4164: $toget=lc($toget);
4165: }
4166: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4167: $safeeval,$depth,$cis);
4168: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4169: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4170: $safeeval,$depth,$cis);
4171: #do we have any specified web size of the picture?
4172: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4173: $depth,1);
4174: if ($TeXwidth) {
4175: my $old_width_param=$width_param;
4176: if ($TeXwidth=~/(\d+)\s*\%/) {
4177: $width_param = $1*$env{'form.textwidth'}/100;
4178: } else {
4179: $width_param = $TeXwidth;
4180: }
4181: if ($TeXheight) {
4182: $height_param = $TeXheight;
4183: } elsif ($old_width_param) {
4184: $height_param=$TeXwidth/$old_width_param*$height_param;
4185: }
4186: } elsif ($TeXheight) {
4187: $height_param = $TeXheight;
4188: if ($height_param) {
4189: $width_param = $TeXheight/$height_param*$width_param;
4190: }
4191: } elsif ($width) {
4192: my $old_width_param=$width_param;
4193: $width_param = $width*$scaling;
4194: if ($old_width_param) {
4195: $height_param=$width_param/$old_width_param*$height_param;
4196: }
4197: }
4198: if ($width_param > $env{'form.textwidth'}) {
4199: my $old_width_param=$width_param;
4200: $width_param =0.95*$env{'form.textwidth'};
4201: if ($old_width_param) {
4202: $height_param=$width_param/$old_width_param*$height_param;
4203: }
4204: }
4205:
4206: return ($height_param, $width_param);
4207: }
4208:
4209: sub image_size {
4210: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4211:
4212: #size of image from gif/jpg/jpeg/png
4213: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4214: if (-e $ressrc) {
4215: $src = $ressrc;
4216: }
4217: my $image = Image::Magick->new;
4218: my $current_figure = $image->Read($src);
4219: my $width_param = $image->Get('width');
4220: my $height_param = $image->Get('height');
4221: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4222: undef($image);
4223:
4224: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4225: $scaling, $parstack, $safeeval,
4226: $depth, $cis);
4227:
4228: return ($height_param, $width_param);
4229: }
4230:
4231: sub image_width {
4232: my ($height, $width) = &image_size(@_);
4233: return $width;
4234: }
4235: # Not yet 100% sure this is correct in all circumstances..
4236: # due to my uncertainty about mods to image_size.
4237: #
4238: sub image_height {
4239: my ($height, $width) = &image_size(@_);
4240: return $height;
4241: }
4242:
4243: sub get_eps_image {
4244: my ($src)=@_;
4245: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4246:
4247: # In order to prevent the substitution of the alt text, we need to
4248: # be sure the orig_src file is on system now so:
4249:
4250: if (! -e $orig_src) {
4251: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4252: }
4253: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4254: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4255: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4256: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4257: &Apache::lonxml::debug("Filelocation gives: $src");
4258: if (! -e $src) {
4259: &Apache::lonxml::debug("$src does not exist");
4260: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4261: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4262: #if replication failed try to find ps file
4263: $src=~s/\.eps$/\.ps/;
4264: &Apache::lonxml::debug("Now looking for $src");
4265: #if no ps file try to replicate it.
4266: my $didrepcopy = &Apache::lonnet::repcopy($src);
4267: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4268: if ( (not -e $src) ||
4269: ($didrepcopy ne 'ok')) {
4270: &Apache::lonxml::debug("Failed to find or replicate $src");
4271:
4272: #if replication failed try to produce eps file dynamically
4273: $src=~s/\.ps$/\.eps/;
4274: my $temp_file;
4275: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4276: my $newsrc=$orig_src;
4277: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4278: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4279: print FILE ("$newsrc\n");
4280: close(FILE);
4281: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4282: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4283: if ($sext ne "") { # Put the ext. back in to uniquify.
4284: $src =~ s/\.eps$/$sext.eps/;
4285: }
4286:
4287: }
4288:
4289: }
4290: } else {
4291: # If the postscript file has spaces in its name,
4292: # LaTeX will gratuitiously vomit. Therefore
4293: # queue such files for copy with " " replaced by "_".
4294: # printout.pm will know them by their .ps or .eps extensions.
4295: my $newsrc = $orig_src;
4296: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4297: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4298: print FILE "$src\n";
4299: close FILE;
4300: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4301: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4302: }
4303: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4304: $path =~ s/ /\_/g;
4305: $file =~ s/ /\_/g;
4306: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4307: return ($path.'/',$file);
4308: }
4309:
4310: sub eps_generation {
4311: my ($src,$file,$width_param) = @_;
4312: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4313: my $temp_file = Apache::File->new('>>'.$filename);
4314: print $temp_file "$src\n";
4315: my $newsrc = $src;
4316: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4317: $newsrc=~s{/home/httpd/html/res}{};
4318: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4319: $newsrc=~s{/\./}{/};
4320: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4321: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4322: $newsrc=~s{/home/httpd/lonUsers}{};
4323: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4324: }
4325: if ($newsrc=~m{/userfiles/}) {
4326: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4327: } else {
4328: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4329: }
4330: }
4331:
4332: sub file_path {
4333: my $src=shift;
4334: my ($file,$path);
4335: if ($src =~ m!(.*)/([^/]*)$!) {
4336: $file = $2;
4337: $path = $1.'/';
4338: }
4339: return $file,$path;
4340: }
4341: # Converts a measurement in to mm from any of
4342: # the other valid LaTeX units of measure.
4343: # If the units of measure are missing from the
4344: # parameter, it is assumed to be in and returned
4345: # with mm units of measure
4346: sub recalc {
4347: my $argument = shift;
4348: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4349: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4350: my $value=$1;
4351: my $units=$2;
4352: if ($units eq 'cm') {
4353: $value*=10;
4354: } elsif ($units eq 'in') {
4355: $value*=25.4;
4356: } elsif ($units eq 'pc') {
4357: $value*=(25.4*12/72.27);
4358: } elsif ($units eq 'pt') {
4359: $value*=(25.4/72.27);
4360: }
4361: return $value.' mm';
4362: }
4363:
4364: sub LATEX_length {
4365: my $garbage=shift;
4366: $garbage=~s/^\s+$//;
4367: $garbage=~s/^\s+(\S.*)/$1/;#space before
4368: $garbage=~s/(.*\S)\s+$/$1/;#space after
4369: $garbage=~s/(\s)+/$1/;#only one space
4370: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4371: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4372: $garbage=~s/([^\\])\$/$1/g;#$
4373: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4374: $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;
4375: $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;
4376: $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;
4377: $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;
4378: $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;
4379: $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;
4380: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4381: #remove some other LaTeX command
4382: $garbage=~s|\\(\w+)\\|\\|g;
4383: $garbage=~s|\\(\w+)(\s*)|$2|g;
4384: $garbage=~s|\+|11|g;
4385: my $value=length($garbage);
4386: return $value;
4387: }
4388:
4389:
4390: # is_inside_of $tagstack $tag
4391: # This sub returns true if the current state of Xml processing
4392: # is inside of the tag.
4393: # Parameters:
4394: # tagstack - The tagstack from the parser.
4395: # tag - The tag (without the <>'s.).
4396: # Sample usage:
4397: # if (is_inside_of($tagstack "table")) {
4398: # # I'm in a table....
4399: # }
4400: sub is_inside_of {
4401: my ($tagstack, $tag) = @_;
4402: my @stack = @$tagstack;
4403: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4404: if ($stack[$i] eq $tag) {
4405: return 1;
4406: }
4407: }
4408: return 0;
4409: }
4410:
4411:
4412: 1;
4413: __END__
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