1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.339 2006/09/25 10:41:15 foxr Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: # use Data::Dumper;
52:
53: BEGIN {
54:
55: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
56:
57: }
58:
59: #
60: # Dumps all elements of the table structure.
61: # Need this 'cause evidently when given an array, Data::Dumper only seems
62: # to dump element 0.
63: #
64: #sub debug_dump_table {
65: # my $lastrow = $#Apache::londefdef::table;
66: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
67: # my $row;
68: # for ($row =0; $row <= $lastrow; $row++ ) {
69: # my $text = Dumper($Apache::londefdef::table[$row]);
70: # &Apache::lonnet::logthis("table [ $row ]".$text);
71: # }
72: #}
73: sub initialize_londefdef {
74: $Apache::londefdef::TD_redirection=0;
75: @Apache::londefdef::table = ();
76: $Apache::londefdef::select=0;
77: undef(@Apache::londefdef::description);
78: @Apache::londefdef::DD=(0);
79: @Apache::londefdef::DT=(0);
80: @Apache::londefdef::seenDT=(0);
81: $Apache::londefdef::list_index=0;
82: undef($Apache::londefdef::head);
83: undef($Apache::londefdef::title);
84: }
85:
86: #======================= TAG SUBROUTINES =====================
87: #-- <output>
88: sub start_output {
89: my ($target) = @_;
90: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
91: return '';
92: }
93: sub end_output {
94: my ($target) = @_;
95: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
96: return '';
97: }
98: #-- <m> tag
99: sub start_m {
100: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
101: my $currentstring = '';
102: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
103: if ($target eq 'web' || $target eq 'analyze') {
104: &Apache::lonxml::debug("M is starting with:$inside:");
105: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
106: if ($eval eq 'on') {
107: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
108: #&Apache::lonxml::debug("M is evaulated to:$inside:");
109: }
110: my $tex = $inside;
111: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
112: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
113: if ($Apache::lontexconvert::errorstring) {
114: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
115: $tex = &HTML::Entities::encode($tex,'<>&"');
116: my ($linenumber) =
117: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
118: if (defined($linenumber)) {
119: my @tex=split("\n",$tex);
120: $tex[$linenumber]='<b><font color="red">'.
121: $tex[$linenumber].'</font></b>';
122: $tex=join("\n",@tex);
123: }
124: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
125: $Apache::lontexconvert::errorstring='';
126: }
127: #&Apache::lonxml::debug("M is ends with:$currentstring:");
128: $Apache::lonxml::post_evaluate=0;
129: } elsif ($target eq 'tex') {
130: $currentstring = $inside;
131: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
132: if ($eval eq 'on') {
133: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
134: }
135: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
136: # detect simple math mode entry exits, and convert them
137: # to use \ensuremath
138: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
139: $currentstring=~s/^(\s*)\$/$1/;
140: $currentstring=~s/\$(\s*)$/$1/;
141: $currentstring='\ensuremath{'.$currentstring.'}';
142: }
143: $Apache::lonxml::post_evaluate=0;
144: }
145: return $currentstring;
146: }
147:
148: sub end_m {
149: my ($target,$token) = @_;
150: my $currentstring = '';
151: if ($target eq 'tex') {
152: $currentstring = "";
153: }
154: return $currentstring;
155: }
156:
157: sub start_tthoption {
158: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
159: my $result;
160: if ($target eq 'web' || $target eq 'webgrade') {
161: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
162: $style);
163: $inside=~s/^\s*//;
164: if ($env{'browser.mathml'}) {
165: &tth::ttmoptions($inside);
166: } else {
167: &tth::tthoptions($inside);
168: }
169: }
170: return $result;
171: }
172:
173: sub end_tthoption {
174: my ($target,$token) = @_;
175: my $result;
176: return $result;
177: }
178:
179: #-- <html> tag (end tag optional)
180: sub start_html {
181: my ($target,$token) = @_;
182: my $currentstring = '';
183: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
184: # start_body() takes care of emitting the <html>
185: } elsif ($target eq 'tex') {
186: $currentstring .=
187: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
188: if (($env{'form.latex_type'}=~'batchmode') ||
189: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
190: $currentstring .= '\newcommand{\keephidden}[1]{}'.
191: '\renewcommand{\deg}{$^{\circ}$}'.
192: '\usepackage{multirow}'.
193: '\usepackage{longtable}'.
194: '\usepackage{textcomp}'.
195: '\usepackage{makeidx}'.
196: '\usepackage[dvips]{graphicx}'.
197: '\usepackage{wrapfig}'.
198: '\usepackage{picins}'.
199: '\usepackage{epsfig}'.
200: '\usepackage{calc}'.
201: '\usepackage{amsmath}'.
202: '\usepackage{amssymb}'.
203: '\usepackage{amsfonts}'.
204: '\usepackage{amsthm}'.
205: '\usepackage{amscd}'.
206: '\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}}'.
207: '\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}}';
208: }
209: return $currentstring;
210: }
211:
212: sub end_html {
213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
214: my $currentstring = '';
215: if ($target eq 'web' || $target eq 'webgrade') {
216: # end_body takes care of the </html>
217: }
218: return $currentstring;
219: }
220:
221: #-- <head> tag (end tag optional)
222: sub start_head {
223: my ($target,$token) = @_;
224: my $currentstring = '';
225: if ($target eq 'web' || $target eq 'webgrade') {
226: &Apache::lonxml::startredirection();
227: }
228: return $currentstring;
229: }
230:
231: sub end_head {
232: my ($target,$token) = @_;
233: my $currentstring = '';
234: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
235: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
236: # in case there is a </head> but no <head>
237: if ($Apache::lonxml::redirection) {
238: $Apache::londefdef::head = &Apache::lonxml::endredirection();
239: }
240: }
241: return $currentstring;
242: }
243:
244: #-- <map> tag (end tag required)
245: sub start_map {
246: my ($target,$token) = @_;
247: my $currentstring = '';
248: if ($target eq 'web' || $target eq 'webgrade') {
249: $currentstring = $token->[4];
250: }
251: return $currentstring;
252: }
253:
254: sub end_map {
255: my ($target,$token) = @_;
256: my $currentstring = '';
257: if ($target eq 'web' || $target eq 'webgrade') {
258: $currentstring = $token->[2];
259: }
260: return $currentstring;
261: }
262:
263: #-- <select> tag (end tag required)
264: sub start_select {
265: my ($target,$token) = @_;
266: my $currentstring = '';
267: if ($target eq 'web' || $target eq 'webgrade') {
268: $currentstring = $token->[4];
269: } elsif ($target eq 'tex') {
270: $Apache::londefdef::select=0;
271: }
272: return $currentstring;
273: }
274:
275: sub end_select {
276: my ($target,$token) = @_;
277: my $currentstring = '';
278: if ($target eq 'web' || $target eq 'webgrade') {
279: $currentstring = $token->[2];
280: }
281: return $currentstring;
282: }
283:
284: #-- <option> tag (end tag optional)
285: sub start_option {
286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
287: my $currentstring = '';
288: if ($target eq 'web' || $target eq 'webgrade') {
289: $currentstring = $token->[4];
290: } elsif ($target eq 'tex') {
291: $Apache::londefdef::select++;
292: if ($Apache::londefdef::select == 1) {
293: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
294: } else {
295: $currentstring='\keephidden{';
296: }
297: }
298: return $currentstring;
299: }
300:
301: sub end_option {
302: my ($target,$token) = @_;
303: my $currentstring = '';
304: if ($target eq 'web' || $target eq 'webgrade') {
305: $currentstring = $token->[2];
306: } elsif ($target eq 'tex') {
307: $currentstring='}';
308: }
309: return $currentstring;
310: }
311:
312: #-- <input> tag (end tag forbidden)
313: sub start_input {
314: my ($target,$token) = @_;
315: my $currentstring = '';
316: if ($target eq 'web' || $target eq 'webgrade') {
317: $currentstring = $token->[4];
318: }
319: return $currentstring;
320: }
321:
322: sub end_input {
323: my ($target,$token) = @_;
324: my $currentstring = '';
325: if ($target eq 'web' || $target eq 'webgrade') {
326: $currentstring = $token->[2];
327: }
328: return $currentstring;
329: }
330:
331: #-- <textarea> tag (end tag required)
332: sub start_textarea {
333: my ($target,$token) = @_;
334: my $currentstring = '';
335: if ($target eq 'web' || $target eq 'webgrade') {
336: $currentstring = $token->[4];
337: }
338: return $currentstring;
339: }
340:
341: sub end_textarea {
342: my ($target,$token) = @_;
343: my $currentstring = '';
344: if ($target eq 'web' || $target eq 'webgrade') {
345: $currentstring = $token->[2];
346: }
347: return $currentstring;
348: }
349:
350: #-- <form> tag (end tag required)
351: sub start_form {
352: my ($target,$token) = @_;
353: my $currentstring = '';
354: if ($target eq 'web' || $target eq 'webgrade') {
355: $currentstring = $token->[4];
356: }
357: return $currentstring;
358: }
359:
360: sub end_form {
361: my ($target,$token) = @_;
362: my $currentstring = '';
363: if ($target eq 'web' || $target eq 'webgrade') {
364: $currentstring = $token->[2];
365: }
366: return $currentstring;
367: }
368:
369: #-- <title> tag (end tag required)
370: sub start_title {
371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
372: my $currentstring = '';
373: if ($target eq 'web' || $target eq 'webgrade') {
374: $Apache::londefdef::title =
375: &Apache::lonxml::get_all_text('/title',$parser,$style);
376: } elsif ($target eq 'tex') {
377: $currentstring .= '\keephidden{Title of the document: '
378: }
379: if ($target eq 'meta') {
380: $currentstring='<title>';
381: &start_output($target);
382: }
383: return $currentstring;
384: }
385:
386: sub end_title {
387: my ($target,$token) = @_;
388: my $currentstring = '';
389: if ($target eq 'web' || $target eq 'webgrade') {
390: # start_title takes care of swallowing the title
391: } elsif ($target eq 'tex') {
392: $currentstring .= '}';
393: }
394: if ($target eq 'meta') {
395: &end_output($target);
396: $currentstring='</title>';
397: }
398: return $currentstring;
399: }
400:
401: #-- <meta> tag (end tag forbidden)
402: sub start_meta {
403: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
404: my $currentstring = '';
405: if ($target eq 'web' || $target eq 'webgrade') {
406: my $args='';
407: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
408: if ($args eq '') {
409: &Apache::lonxml::get_all_text("/meta",$parser,$style);
410: } else {
411: $currentstring = $token->[4];
412: }
413: } elsif ($target eq 'meta') {
414: unless (&Apache::lonxml::get_param
415: ('http-equiv',$parstack,$safeeval,undef,1)) {
416: my $name=$token->[2]->{'name'};
417: $name=~tr/A-Z/a-z/;
418: $name=~s/\s/\_/gs;
419: $name=~s/\W//gs;
420: if ($name) {
421: $currentstring='<'.$name;
422: my $display=&Apache::lonxml::get_param
423: ('display',$parstack,$safeeval,undef,1);
424: if ($display) {
425: $display=~s/\"/\'/g;
426: $currentstring.=' display="'.$display.'"';
427: }
428: $currentstring.='>'.
429: &Apache::lonxml::get_param
430: ('content',$parstack,$safeeval,undef,1).
431: '</'.$name.'>';
432: }
433: my $display=&Apache::lonxml::get_param
434: ('display',$parstack,$safeeval,undef,1);
435: if ($display) {
436: $display=&HTML::Entities::encode($display,'<>&"');
437: $currentstring.='<'.$name.'.display>'.$display.
438: '</'.$name.'.display>';
439: }
440: }
441: } elsif ($target eq 'tex') {
442: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
443: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
444: if ((not defined $content) && (not defined $name)) {
445: &Apache::lonxml::startredirection();
446: }
447: }
448: return $currentstring;
449: }
450:
451: sub end_meta {
452: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
453: my $currentstring = '';
454: if ($target eq 'web' || $target eq 'webgrade') {
455: my $args='';
456: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
457: if ($args ne '') {
458: $currentstring = $token->[4];
459: }
460: } elsif ($target eq 'tex') {
461: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
462: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
463: if ((not defined $content) && (not defined $name)) {
464: &Apache::lonxml::endredirection();
465: }
466: }
467: return $currentstring;
468: }
469:
470: # accessrule
471: sub start_accessrule {
472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
473: my $currentstring = '';
474: my $eff=&Apache::lonxml::get_param
475: ('effect',$parstack,$safeeval,undef,1);
476: my $realm=&Apache::lonxml::get_param
477: ('realm',$parstack,$safeeval,undef,1);
478: my $role=&Apache::lonxml::get_param
479: ('role',$parstack,$safeeval,undef,1);
480: $realm=~s/\s+//g;
481: $realm=~s/\//\_/g;
482: $realm=~s/^\_//;
483: $realm=~s/\W/\;/g;
484: $role=~s/\s+//g;
485: $role=~s/\//\_/g;
486: $role=~s/\W/\;/g;
487: if ($target eq 'web') {
488: my $args='';
489: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
490: if ($args eq '') {
491: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
492: } else {
493: $currentstring = $token->[4];
494: }
495: }
496: if ($target eq 'meta') {
497: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
498: }
499: return $currentstring;
500: }
501:
502: sub end_accessrule {
503: my ($target,$token,$tagstack,$parstack,$parser) = @_;
504: my $currentstring = '';
505: if ($target eq 'web') {
506: my $args='';
507: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
508: if ($args ne '') {
509: $currentstring = $token->[4];
510: }
511: }
512: return $currentstring;
513: }
514:
515: #-- <body> tag (end tag required)
516: sub start_body {
517: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
518: my $currentstring = '';
519:
520: if ($target eq 'web' || $target eq 'webgrade') {
521: if ($Apache::lonhomework::parsing_a_problem) {
522: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
523: return '';
524: }
525:
526: if (&is_inside_of($tagstack, "head")) {
527: &end_head(@_);
528: }
529: $currentstring =
530: &Apache::loncommon::start_page($Apache::londefdef::title,
531: $Apache::londefdef::head,
532: {'add_entries' => $token->[2],
533: 'no_title' => 1,
534: 'force_register' => 1});
535:
536: if ($env{'request.state'} ne 'published') {
537: $currentstring.=&Apache::lonmenu::constspaceform();
538: $currentstring.=(<<EDITBUTTON);
539: <form method="post">
540: <input type="submit" name="editmode" accesskey="e" value="Edit" />
541: </form>
542: <br />
543: EDITBUTTON
544: }
545: $currentstring.=&Apache::lonxml::message_location();
546: } elsif ($target eq 'tex') {
547: $currentstring = '\begin{document}';
548: }
549: return $currentstring;
550: }
551:
552: sub end_body {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
554: my $currentstring = &end_p(); # Close off unclosed <p>
555: if ($target eq 'web' || $target eq 'webgrade') {
556: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
557: } elsif ($target eq 'tex') {
558: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
559: }
560: return $currentstring;
561: }
562:
563: # \begin{center} causes a new paragprah spacing that looks odd inside
564: # of a table cell. Same at the end of a \center but with a slightly
565: # larger space .. hence center_correction and center_end_correction.
566: #
567: sub center_correction { return '\vspace*{-6 mm}'; }
568: sub center_end_correction { return '\vspace*{-7 mm}'; }
569:
570: #-- <center> tag (end tag required)
571: sub start_center {
572: my ($target,$token,$tagstack) = @_;
573: my $currentstring = &end_p(); # Close off any prior para.
574: if ($target eq 'web' || $target eq 'webgrade') {
575: $currentstring .= $token->[4];
576: } elsif ($target eq 'tex') {
577: if (&is_inside_of($tagstack, "table")) {
578: $currentstring .= ¢er_correction();
579: }
580: $currentstring .= '\begin{center}';
581: }
582: return $currentstring;
583: }
584:
585: sub end_center {
586: my ($target,$token,$tagstack) = @_;
587: my $currentstring = '';
588: if ($target eq 'web' || $target eq 'webgrade') {
589: $currentstring = $token->[2];
590: } elsif ($target eq 'tex') {
591: $currentstring = '\end{center}';
592: if (&is_inside_of($tagstack, "table")) {
593: $currentstring .= ¢er_end_correction();
594: }
595: }
596: return $currentstring;
597: }
598:
599: #-- <b> tag (end tag required)
600: # NOTE: In TeX mode disables internal <p>
601: sub start_b {
602: my ($target,$token) = @_;
603: my $currentstring = '';
604: if ($target eq 'web' || $target eq 'webgrade') {
605: $currentstring = $token->[4];
606: } elsif ($target eq 'tex') {
607: &disable_para();
608: $currentstring .= '\textbf{';
609: }
610: return $currentstring;
611: }
612:
613: sub end_b {
614: my ($target,$token) = @_;
615: my $currentstring = '';
616: if ($target eq 'web' || $target eq 'webgrade') {
617: $currentstring = $token->[2];
618: } elsif ($target eq 'tex') {
619: &enable_para();
620: $currentstring = '}';
621: }
622: return $currentstring;
623: }
624:
625: #-- <strong> tag (end tag required)
626: # NOTE: in TeX mode disables internal <p>
627: sub start_strong {
628: my ($target,$token) = @_;
629: my $currentstring = '';
630: if ($target eq 'web' || $target eq 'webgrade') {
631: $currentstring = $token->[4];
632: } elsif ($target eq 'tex') {
633: &disable_para();
634: $currentstring = '\textbf{';
635: }
636: return $currentstring;
637: }
638:
639: sub end_strong {
640: my ($target,$token) = @_;
641: my $currentstring = '';
642: if ($target eq 'web' || $target eq 'webgrade') {
643: $currentstring = $token->[2];
644: } elsif ($target eq 'tex') {
645: &enable_para();
646: $currentstring = '}';
647: }
648: return $currentstring;
649: }
650:
651: #-- <h1> tag (end tag required)
652: sub start_h1 {
653: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
654: my $currentstring = &end_p(); # Close off any prior para.
655: if ($target eq 'web' || $target eq 'webgrade') {
656: $currentstring .= $token->[4];
657: } elsif ($target eq 'tex') {
658: my $pre;
659: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
660: if ($align eq 'center') {
661: $pre='\begin{center}';
662: } elsif ($align eq 'left') {
663: $pre='\rlap{';
664: } elsif ($align eq 'right') {
665: $pre=' \hfill \llap{';
666: }
667: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
668: if (not defined $TeXsize) {$TeXsize="large";}
669: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
670: } elsif ($target eq 'meta') {
671: $currentstring.='<subject>';
672: &start_output($target);
673: }
674: return $currentstring;
675: }
676:
677: sub end_h1 {
678: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
679: my $currentstring = '';
680: if ($target eq 'web' || $target eq 'webgrade') {
681: $currentstring .= $token->[2];
682: } elsif ($target eq 'tex') {
683: my $post='\vskip 0 mm ';
684: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
685: if ($align eq 'center') {
686: $post='\end{center}';
687: } elsif ($align eq 'left') {
688: $post='} \hfill'.'\vskip 0 mm ';
689: } elsif ($align eq 'right') {
690: $post='}'.'\vskip 0 mm ';
691: }
692: $currentstring .= '}}'.$post;
693: } elsif ($target eq 'meta') {
694: &end_output($target);
695: $currentstring='</subject>';
696: }
697: return $currentstring;
698: }
699:
700: #-- <h2> tag
701: sub start_h2 {
702: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
703: my $currentstring = &end_p(); # Close off any prior para.
704: if ($target eq 'web' || $target eq 'webgrade') {
705: $currentstring .= $token->[4];
706: } elsif ($target eq 'tex') {
707: my $pre;
708: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
709: if ($align eq 'center') {
710: $pre='\begin{center}';
711: } elsif ($align eq 'left') {
712: $pre='\rlap{';
713: } elsif ($align eq 'right') {
714: $pre=' \hfill \llap{';
715: }
716: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
717: if (not defined $TeXsize) {$TeXsize="large";}
718: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
719: }
720: return $currentstring;
721: }
722:
723: sub end_h2 {
724: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
725: my $currentstring = '';
726: if ($target eq 'web' || $target eq 'webgrade') {
727: $currentstring .= $token->[2];
728: } elsif ($target eq 'tex') {
729: my $post='\vskip 0 mm ';
730: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
731: if ($align eq 'center') {
732: $post='\end{center}';
733: } elsif ($align eq 'left') {
734: $post='} \hfill'.'\vskip 0 mm ';
735: } elsif ($align eq 'right') {
736: $post='}'.'\vskip 0 mm ';
737: }
738: $currentstring .= '}}'.$post;
739: }
740: return $currentstring;
741: }
742:
743: #-- <h3> tag
744: sub start_h3 {
745: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
746: my $currentstring = &end_p(); # Close off any prior para.
747: if ($target eq 'web' || $target eq 'webgrade') {
748: $currentstring .= $token->[4];
749: } elsif ($target eq 'tex') {
750: my $pre;
751: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
752: if ($align eq 'center') {
753: $pre='\begin{center}';
754: } elsif ($align eq 'left') {
755: $pre='\rlap{';
756: } elsif ($align eq 'right') {
757: $pre=' \hfill \llap{';
758: }
759: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
760: if (not defined $TeXsize) {$TeXsize="large";}
761: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
762: }
763: return $currentstring;
764: }
765:
766: sub end_h3 {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
768: my $currentstring = '';
769: if ($target eq 'web' || $target eq 'webgrade') {
770: $currentstring .= $token->[2];
771: } elsif ($target eq 'tex') {
772: my $post='\vskip 0 mm ';
773: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
774: if ($align eq 'center') {
775: $post='\end{center}';
776: } elsif ($align eq 'left') {
777: $post='} \hfill'.'\vskip 0 mm ';
778: } elsif ($align eq 'right') {
779: $post='}'.'\vskip 0 mm ';
780: }
781: $currentstring .= '}}'.$post;
782: }
783: return $currentstring;
784: }
785:
786: #-- <h4> tag
787: sub start_h4 {
788: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
789: my $currentstring = &end_p(); # Close off any prior para.
790: if ($target eq 'web' || $target eq 'webgrade') {
791: $currentstring .= $token->[4];
792: } elsif ($target eq 'tex') {
793: my $pre;
794: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
795: if ($align eq 'center') {
796: $pre='\begin{center}';
797: } elsif ($align eq 'left') {
798: $pre='\rlap{';
799: } elsif ($align eq 'right') {
800: $pre=' \hfill \llap{';
801: }
802: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
803: if (not defined $TeXsize) {$TeXsize="large";}
804: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
805: }
806: return $currentstring;
807: }
808:
809: sub end_h4 {
810: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
811: my $currentstring = '';
812: if ($target eq 'web' || $target eq 'webgrade') {
813: $currentstring .= $token->[2];
814: } elsif ($target eq 'tex') {
815: my $post='\vskip 0 mm ';
816: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
817: if ($align eq 'center') {
818: $post='\end{center}';
819: } elsif ($align eq 'left') {
820: $post='} \hfill'.'\vskip 0 mm ';
821: } elsif ($align eq 'right') {
822: $post='}'.'\vskip 0 mm ';
823: }
824: $currentstring .= '}}'.$post;
825: }
826: return $currentstring;
827: }
828:
829: #-- <h5> tag
830: sub start_h5 {
831: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
832: my $currentstring = &end_p(); # Close off any prior paras.
833: if ($target eq 'web' || $target eq 'webgrade') {
834: $currentstring .= $token->[4];
835: } elsif ($target eq 'tex') {
836: my $pre;
837: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
838: if ($align eq 'center') {
839: $pre='\begin{center}';
840: } elsif ($align eq 'left') {
841: $pre='\rlap{';
842: } elsif ($align eq 'right') {
843: $pre=' \hfill \llap{';
844: }
845: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
846: if (not defined $TeXsize) {$TeXsize="large";}
847: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
848: }
849: return $currentstring;
850: }
851:
852: sub end_h5 {
853: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
854: my $currentstring = '';
855: if ($target eq 'web' || $target eq 'webgrade') {
856: $currentstring .= $token->[2];
857: } elsif ($target eq 'tex') {
858: my $post='\vskip 0 mm ';
859: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
860: if ($align eq 'center') {
861: $post='\end{center}';
862: } elsif ($align eq 'left') {
863: $post='} \hfill'.'\vskip 0 mm ';
864: } elsif ($align eq 'right') {
865: $post='}'.'\vskip 0 mm ';
866: }
867: $currentstring .= '}}'.$post;
868: }
869: return $currentstring;
870: }
871:
872: #-- <h6> tag
873: sub start_h6 {
874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
875: my $currentstring = &end_p(); # Close off any prior paras.
876: if ($target eq 'web' || $target eq 'webgrade') {
877: $currentstring .= $token->[4];
878: } elsif ($target eq 'tex') {
879: my $pre;
880: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
881: if ($align eq 'center') {
882: $pre='\begin{center}';
883: } elsif ($align eq 'left') {
884: $pre='\rlap{';
885: } elsif ($align eq 'right') {
886: $pre=' \hfill \llap{';
887: }
888: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
889: if (not defined $TeXsize) {$TeXsize="large";}
890: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
891: }
892: return $currentstring;
893: }
894:
895: sub end_h6 {
896: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
897: my $currentstring = '';
898: if ($target eq 'web' || $target eq 'webgrade') {
899: $currentstring .= $token->[2];
900: } elsif ($target eq 'tex') {
901: my $post='\vskip 0 mm ';
902: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
903: if ($align eq 'center') {
904: $post='\end{center}';
905: } elsif ($align eq 'left') {
906: $post='} \hfill'.'\vskip 0 mm ';
907: } elsif ($align eq 'right') {
908: $post='}'.'\vskip 0 mm ';
909: }
910: $currentstring .= '}}'.$post;
911: }
912: return $currentstring;
913: }
914:
915: #--- <cite> tag (end tag required)
916: sub start_cite {
917: my ($target,$token) = @_;
918: my $currentstring = '';
919: if ($target eq 'web' || $target eq 'webgrade') {
920: $currentstring .= $token->[4];
921: } elsif ($target eq 'tex') {
922: $currentstring .= '\textit{';
923: }
924: return $currentstring;
925: }
926:
927: sub end_cite {
928: my ($target,$token) = @_;
929: my $currentstring = '';
930: if ($target eq 'web' || $target eq 'webgrade') {
931: $currentstring .= $token->[2];
932: } elsif ($target eq 'tex') {
933: $currentstring .= '}';
934: }
935: return $currentstring;
936: }
937:
938: #-- <i> tag (end tag required)
939: sub start_i {
940: my ($target,$token) = @_;
941: my $currentstring = '';
942: if ($target eq 'web' || $target eq 'webgrade') {
943: $currentstring .= $token->[4];
944: } elsif ($target eq 'tex') {
945: $currentstring .= '\textit{';
946: }
947: return $currentstring;
948: }
949:
950: sub end_i {
951: my ($target,$token) = @_;
952: my $currentstring = '';
953: if ($target eq 'web' || $target eq 'webgrade') {
954: $currentstring .= $token->[2];
955: } elsif ($target eq 'tex') {
956: $currentstring .= '}';
957: }
958: return $currentstring;
959: }
960:
961: #-- <address> tag (end tag required)
962: sub start_address {
963: my ($target,$token) = @_;
964: my $currentstring = '';
965: if ($target eq 'web' || $target eq 'webgrade') {
966: $currentstring .= $token->[4];
967: } elsif ($target eq 'tex') {
968: $currentstring .= '\textit{';
969: }
970: return $currentstring;
971: }
972:
973: sub end_address {
974: my ($target,$token) = @_;
975: my $currentstring = '';
976: if ($target eq 'web' || $target eq 'webgrade') {
977: $currentstring .= $token->[2];
978: } elsif ($target eq 'tex') {
979: $currentstring .= '}';
980: }
981: return $currentstring;
982: }
983:
984: #-- <dfn> tag (end tag required)
985: sub start_dfn {
986: my ($target,$token) = @_;
987: my $currentstring = '';
988: if ($target eq 'web' || $target eq 'webgrade') {
989: $currentstring .= $token->[4];
990: } elsif ($target eq 'tex') {
991: $currentstring .= '\textit{';
992: }
993: return $currentstring;
994: }
995:
996: sub end_dfn {
997: my ($target,$token) = @_;
998: my $currentstring = '';
999: if ($target eq 'web' || $target eq 'webgrade') {
1000: $currentstring .= $token->[2];
1001: } elsif ($target eq 'tex') {
1002: $currentstring .= '}';
1003: }
1004: return $currentstring;
1005: }
1006:
1007: #-- <tt> tag (end tag required)
1008: sub start_tt {
1009: my ($target,$token) = @_;
1010: my $currentstring = '';
1011: if ($target eq 'web' || $target eq 'webgrade') {
1012: $currentstring .= $token->[4];
1013: } elsif ($target eq 'tex') {
1014: $currentstring .= '\texttt{';
1015: }
1016: return $currentstring;
1017: }
1018:
1019: sub end_tt {
1020: my ($target,$token) = @_;
1021: my $currentstring = '';
1022: if ($target eq 'web' || $target eq 'webgrade') {
1023: $currentstring .= $token->[2];
1024: } elsif ($target eq 'tex') {
1025: $currentstring .= '}';
1026: }
1027: return $currentstring;
1028: }
1029:
1030: #-- <kbd> tag (end tag required)
1031: sub start_kbd {
1032: my ($target,$token) = @_;
1033: my $currentstring = '';
1034: if ($target eq 'web' || $target eq 'webgrade') {
1035: $currentstring .= $token->[4];
1036: } elsif ($target eq 'tex') {
1037: $currentstring .= '\texttt{';
1038: }
1039: return $currentstring;
1040: }
1041:
1042: sub end_kbd {
1043: my ($target,$token) = @_;
1044: my $currentstring = '';
1045: if ($target eq 'web' || $target eq 'webgrade') {
1046: $currentstring .= $token->[2];
1047: } elsif ($target eq 'tex') {
1048: $currentstring .= '}';
1049: }
1050: return $currentstring;
1051: }
1052:
1053: #-- <code> tag (end tag required)
1054: sub start_code {
1055: my ($target,$token) = @_;
1056: my $currentstring = '';
1057: if ($target eq 'web' || $target eq 'webgrade') {
1058: $currentstring .= $token->[4];
1059: } elsif ($target eq 'tex') {
1060: $currentstring .= '\texttt{';
1061: }
1062: return $currentstring;
1063: }
1064:
1065: sub end_code {
1066: my ($target,$token) = @_;
1067: my $currentstring = '';
1068: if ($target eq 'web' || $target eq 'webgrade') {
1069: $currentstring .= $token->[2];
1070: } elsif ($target eq 'tex') {
1071: $currentstring .= '}';
1072: }
1073: return $currentstring;
1074: }
1075:
1076: #-- <em> tag (end tag required)
1077: sub start_em {
1078: my ($target,$token) = @_;
1079: my $currentstring = '';
1080: if ($target eq 'web' || $target eq 'webgrade') {
1081: $currentstring .= $token->[4];
1082: } elsif ($target eq 'tex') {
1083: $currentstring .= '\emph{';
1084: }
1085: return $currentstring;
1086: }
1087:
1088: sub end_em {
1089: my ($target,$token) = @_;
1090: my $currentstring = '';
1091: if ($target eq 'web' || $target eq 'webgrade') {
1092: $currentstring .= $token->[2];
1093: } elsif ($target eq 'tex') {
1094: $currentstring .= '}';
1095: }
1096: return $currentstring;
1097: }
1098:
1099: #-- <q> tag (end tag required)
1100: sub start_q {
1101: my ($target,$token) = @_;
1102: my $currentstring = '';
1103: if ($target eq 'web' || $target eq 'webgrade') {
1104: $currentstring .= $token->[4];
1105: } elsif ($target eq 'tex') {
1106: $currentstring .= '\emph{';
1107: }
1108: return $currentstring;
1109: }
1110:
1111: sub end_q {
1112: my ($target,$token) = @_;
1113: my $currentstring = '';
1114: if ($target eq 'web' || $target eq 'webgrade') {
1115: $currentstring .= $token->[2];
1116: } elsif ($target eq 'tex') {
1117: $currentstring .= '}';
1118: }
1119: return $currentstring;
1120: }
1121:
1122: # <p> is a bit strange since it does not require a closing </p>
1123: # However in latex, we must often output closing stuff to end
1124: # environments and {}'s etc. Therefore we do all the work
1125: # of figuring out the ending strings in the start tag processing,
1126: # and provide a mechanism to output the stop text external
1127: # to tag processing.
1128: #
1129: {
1130:
1131: my $closing_string = ''; # String required to close <p>
1132:
1133: # Some tags are <p> fragile meaning that <p> inside of them
1134: # does not work within TeX mode. This is managed via the
1135: # counter below:
1136: #
1137:
1138: my $para_disabled = 0;
1139:
1140: sub disable_para {
1141: $para_disabled++;
1142: }
1143: sub enable_para {
1144: $para_disabled--;
1145: }
1146:
1147:
1148: #-- <p> tag (end tag optional)
1149: #optional attribute - align="center|left|right"
1150: sub start_p {
1151: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1152: my $currentstring = '';
1153: if ($target eq 'web' || $target eq 'webgrade') {
1154: $currentstring .= &end_p(); # close off prior para if in progress.
1155: $currentstring .= $token->[4];
1156: if (! ($currentstring =~ /\//)) {
1157: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1158: }
1159: } elsif ($target eq 'tex' && !$para_disabled) {
1160:
1161: $currentstring .= &end_p(); # close off prior para if in progress.
1162: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1163: if ($align eq 'center') {
1164: $currentstring .='\begin{center}\par ';
1165: $closing_string = '\end{center}';
1166: if (&is_inside_of($tagstack, "table")) {
1167: $currentstring = ¢er_correction().$currentstring;
1168: }
1169: } elsif ($align eq 'right') {
1170: $currentstring.="\n".'{\flushright ';
1171: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1172: $closing_string= "}\n";
1173: } elsif ($align eq 'left') {
1174: $currentstring.= "\n".'{\flushleft ';
1175: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1176: $closing_string = "}\n";
1177: } else {
1178: $currentstring.='\par ';
1179: if (&is_inside_of($tagstack, 'table')) {
1180: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1181: } else {
1182: $closing_string = '\strut\\\\\strut ';
1183: }
1184: }
1185:
1186: }
1187: return $currentstring;
1188: }
1189: #
1190: # End paragraph processing just requires that we output the
1191: # closing string that was saved and blank it.
1192: sub end_p {
1193: # Note only 'tex' mode uses disable_para and enable_para
1194: # so we don't need to know the target in the check below:
1195:
1196: if (!$para_disabled) {
1197: my $current_string = $closing_string;
1198: $closing_string = ''; # Not in a para anymore.
1199: return $current_string;
1200: } else {
1201: return '';
1202: }
1203:
1204: }
1205: }
1206: #-- <br> tag (end tag forbidden)
1207: sub start_br {
1208: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1209: my $currentstring = '';
1210: if ($target eq 'web' || $target eq 'webgrade') {
1211: $currentstring .= $token->[4];
1212: } elsif ($target eq 'tex') {
1213: my @tempo=@$tagstack;
1214: my $signal=0;
1215: # Not going to factor this to is_inside_of since that would require
1216: # multiple stack traversals.
1217: #
1218: for (my $i=$#tempo;$i>=0;$i--) {
1219: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1220: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1221: $signal=1;
1222: }
1223: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1224: $signal = 1;
1225: }
1226: }
1227: if ($signal eq 1) {
1228: $currentstring .= ' \vskip 0 mm ';
1229: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1230: $currentstring .= '\strut \\\\ \strut ';
1231: } else { # Honor break in simple <sup></sup>
1232: $currentstring .= '}} \strut \\\\ \strut \ensuremath{^{';
1233: }
1234: }
1235: return $currentstring;
1236: }
1237:
1238: sub end_br {
1239: my ($target,$token) = @_;
1240: my $currentstring = '';
1241: if ($target eq 'web' || $target eq 'webgrade') {
1242: $currentstring .= $token->[2];
1243: }
1244: return $currentstring;
1245: }
1246:
1247: #-- <big> tag (end tag required)
1248: sub start_big {
1249: my ($target,$token) = @_;
1250: my $currentstring = '';
1251: if ($target eq 'web' || $target eq 'webgrade') {
1252: $currentstring .= $token->[4];
1253: } elsif ($target eq 'tex') {
1254: $currentstring .= '{\large ';
1255: }
1256: return $currentstring;
1257: }
1258:
1259: sub end_big {
1260: my ($target,$token) = @_;
1261: my $currentstring = '';
1262: if ($target eq 'web' || $target eq 'webgrade') {
1263: $currentstring .= $token->[2];
1264: } elsif ($target eq 'tex') {
1265: $currentstring .= '}';
1266: }
1267: return $currentstring;
1268: }
1269:
1270: #-- <small> tag (end tag required)
1271: sub start_small {
1272: my ($target,$token) = @_;
1273: my $currentstring = '';
1274: if ($target eq 'web' || $target eq 'webgrade') {
1275: $currentstring .= $token->[4];
1276: } elsif ($target eq 'tex') {
1277: $currentstring .= '{\footnotesize ';
1278: }
1279: return $currentstring;
1280: }
1281:
1282: sub end_small {
1283: my ($target,$token) = @_;
1284: my $currentstring = '';
1285: if ($target eq 'web' || $target eq 'webgrade') {
1286: $currentstring .= $token->[2];
1287: } elsif ($target eq 'tex') {
1288: $currentstring .= '}';
1289: }
1290: return $currentstring;
1291: }
1292:
1293: #-- <basefont> tag (end tag forbidden)
1294: sub start_basefont {
1295: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1296: my $currentstring = '';
1297: if ($target eq 'web' || $target eq 'webgrade') {
1298: $currentstring = $token->[4];
1299: } elsif ($target eq 'tex') {
1300: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1301: if (defined $basesize) {
1302: $currentstring = '{\\'.$basesize.' ';
1303: }
1304: }
1305: return $currentstring;
1306: }
1307:
1308: sub end_basefont {
1309: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1310: my $currentstring = '';
1311: if ($target eq 'web' || $target eq 'webgrade') {
1312: $currentstring = $token->[4];
1313: } elsif ($target eq 'tex') {
1314: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1315: if (defined $basesize) {
1316: $currentstring = '}';
1317: }
1318: }
1319: return $currentstring;
1320: }
1321:
1322: #-- <font> tag (end tag required)
1323: sub start_font {
1324: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1325: my $currentstring = '';
1326: if ($target eq 'web' || $target eq 'webgrade') {
1327: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1328: if ($face!~/symbol/i) {
1329: if (($env{'browser.fontenhance'} eq 'on') ||
1330: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1331: }
1332: $currentstring = $token->[4];
1333: } elsif ($target eq 'tex') {
1334: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1335: if (defined $fontsize) {
1336: $currentstring = '{\\'.$fontsize.' ';
1337: }
1338: }
1339: return $currentstring;
1340: }
1341:
1342: sub end_font {
1343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1344: my $currentstring = '';
1345: if ($target eq 'web' || $target eq 'webgrade') {
1346: $currentstring = $token->[2];
1347: } elsif ($target eq 'tex') {
1348: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1349: if (defined $fontsize) {
1350: $currentstring = '}';
1351: }
1352: }
1353: return $currentstring;
1354: }
1355:
1356: #-- <strike> tag (end tag required)
1357: sub start_strike {
1358: my ($target,$token) = @_;
1359: my $currentstring = '';
1360: if ($target eq 'web' || $target eq 'webgrade') {
1361: $currentstring .= $token->[4];
1362: } elsif ($target eq 'tex') {
1363: &Apache::lonxml::startredirection();
1364: }
1365: return $currentstring;
1366: }
1367:
1368: sub end_strike {
1369: my ($target,$token) = @_;
1370: my $currentstring = '';
1371: if ($target eq 'web' || $target eq 'webgrade') {
1372: $currentstring .= $token->[2];
1373: } elsif ($target eq 'tex') {
1374: $currentstring=&Apache::lonxml::endredirection();
1375: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1376: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1377: $currentstring=~s/(\S)\s*$/$1\}/;
1378: }
1379: return $currentstring;
1380: }
1381:
1382: #-- <s> tag (end tag required)
1383: sub start_s {
1384: my ($target,$token) = @_;
1385: my $currentstring = '';
1386: if ($target eq 'web' || $target eq 'webgrade') {
1387: $currentstring .= $token->[4];
1388: } elsif ($target eq 'tex') {
1389: &Apache::lonxml::startredirection();
1390: }
1391: return $currentstring;
1392: }
1393:
1394: sub end_s {
1395: my ($target,$token) = @_;
1396: my $currentstring = '';
1397: if ($target eq 'web' || $target eq 'webgrade') {
1398: $currentstring .= $token->[2];
1399: } elsif ($target eq 'tex') {
1400: $currentstring=&Apache::lonxml::endredirection();
1401: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1402: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1403: $currentstring=~s/(\S)\s*$/$1\}/;
1404: }
1405: return $currentstring;
1406: }
1407:
1408: #-- <sub> tag (end tag required)
1409: sub start_sub {
1410: my ($target,$token) = @_;
1411: my $currentstring = '';
1412: if ($target eq 'web' || $target eq 'webgrade') {
1413: $currentstring .= $token->[4];
1414: } elsif ($target eq 'tex') {
1415: $currentstring .= '\ensuremath{_{';
1416: }
1417: return $currentstring;
1418: }
1419:
1420: sub end_sub {
1421: my ($target,$token) = @_;
1422: my $currentstring = '';
1423: if ($target eq 'web' || $target eq 'webgrade') {
1424: $currentstring .= $token->[2];
1425: } elsif ($target eq 'tex') {
1426: $currentstring .= '}}';
1427: }
1428: return $currentstring;
1429: }
1430:
1431: #-- <sup> tag (end tag required)
1432: sub start_sup {
1433: my ($target,$token) = @_;
1434: my $currentstring = '';
1435: if ($target eq 'web' || $target eq 'webgrade') {
1436: $currentstring .= $token->[4];
1437: } elsif ($target eq 'tex') {
1438: $currentstring .= '\ensuremath{^{';
1439: }
1440: return $currentstring;
1441: }
1442:
1443: sub end_sup {
1444: my ($target,$token) = @_;
1445: my $currentstring = '';
1446: if ($target eq 'web' || $target eq 'webgrade') {
1447: $currentstring .= $token->[2];
1448: } elsif ($target eq 'tex') {
1449: $currentstring .= '}}';
1450: }
1451: return $currentstring;
1452: }
1453:
1454: #-- <hr> tag (end tag forbidden)
1455: sub start_hr {
1456: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1457: my $currentstring = &end_p(); # End enclosing para.
1458: if ($target eq 'web' || $target eq 'webgrade') {
1459: $currentstring .= $token->[4];
1460: } elsif ($target eq 'tex') {
1461: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1462: if (defined $LaTeXwidth) {
1463: if ($LaTeXwidth=~/^%/) {
1464: substr($LaTeXwidth,0,1)='';
1465: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1466: }
1467: } else {
1468: $LaTeXwidth ='0.9\textwidth';
1469: }
1470: my ($pre,$post);
1471: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1472: if (($align eq 'center') || (not defined $align)) {
1473: $pre=''; $post='';
1474: } elsif ($align eq 'left') {
1475: $pre='\rlap{'; $post='} \hfill';
1476: } elsif ($align eq 'right') {
1477: $pre=' \hfill \llap{'; $post='}';
1478: }
1479: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1480: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1481: }
1482: return $currentstring;
1483: }
1484:
1485: sub end_hr {
1486: my ($target,$token) = @_;
1487: my $currentstring = '';
1488: if ($target eq 'web' || $target eq 'webgrade') {
1489: $currentstring .= $token->[2];
1490: }
1491: return $currentstring;
1492: }
1493:
1494: #-- <div> tag (end tag required)
1495: {
1496:
1497: # Since div can be nested, the stack below is used
1498: # in 'tex' mode to store the ending strings
1499: # for the div stack.
1500:
1501: my @div_end_stack;
1502:
1503: sub start_div {
1504: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1505: my $currentstring = &end_p(); # Close enclosing para.
1506: if ($target eq 'web' || $target eq 'webgrade') {
1507: $currentstring .= $token->[4];
1508: }
1509: if ($target eq 'tex') {
1510: # 4 possible alignments: left, right, center, and -missing-.
1511:
1512: my $endstring = '';
1513:
1514: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1515: $safeeval, undef, 1));
1516: if ($align eq 'center') {
1517: $currentstring .= '\begin{center}';
1518: $endstring = '\end{center}';
1519: if (&is_inside_of($tagstack, "table")) {
1520: $currentstring = ¢er_correction().$currentstring;
1521: }
1522: }
1523: elsif ($align eq 'right') {
1524: $currentstring .= '\begin{flushright}';
1525: $endstring .= '\end{flushright}';
1526: } elsif ($align eq 'left') {
1527: $currentstring .= '\begin{flushleft}';
1528: $endstring = '\end{flushleft}';
1529: } else {
1530:
1531: }
1532: $currentstring .= "\n"; # For human readability.
1533: $endstring = "\n$endstring\n"; # For human readability
1534: push(@div_end_stack, $endstring);
1535: }
1536: return $currentstring;
1537: }
1538:
1539: sub end_div {
1540: my ($target,$token) = @_;
1541: my $currentstring = '';
1542: if ($target eq 'web' || $target eq 'webgrade') {
1543: $currentstring .= $token->[2];
1544: }
1545: if ($target eq 'tex') {
1546: my $endstring = pop @div_end_stack;
1547: $currentstring .= $endstring;
1548: }
1549: return $currentstring;
1550: }
1551: }
1552:
1553: #-- <a> tag (end tag required)
1554: sub start_a {
1555: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1556: my $currentstring = '';
1557: if ($target eq 'web' || $target eq 'webgrade') {
1558: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1559: undef,1);
1560: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1561: } elsif ($target eq 'tex') {
1562: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1563: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1564: if ($a=~/\S/) {
1565: $a=~s/([^\\])%/$1\\\%/g;
1566: $currentstring .= '\ref{URI: '.$a.'}';
1567: } elsif ($b=~/\S/) {
1568: $currentstring .= '\ref{Anchor: '.$b.'}';
1569: } else {
1570: $currentstring.='';
1571: }
1572: }
1573: return $currentstring;
1574: }
1575:
1576: sub end_a {
1577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1578: my $currentstring = '';
1579: if ($target eq 'web' || $target eq 'webgrade') {
1580: $currentstring .= $token->[2];
1581: }
1582: return $currentstring;
1583: }
1584:
1585: #-- <li> tag (end tag optional)
1586: sub start_li {
1587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1588: my $currentstring = '';
1589: if ($target eq 'web' || $target eq 'webgrade') {
1590: $currentstring = $token->[4];
1591: } elsif ($target eq 'tex') {
1592: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1593: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1594: #FIXME need to support types i and I
1595: if ($type=~/disc/) {
1596: $currentstring .= ' \item[$\bullet$] ';
1597: } elsif ($type=~/circle/) {
1598: $currentstring .= ' \item[$\circ$] ';
1599: } elsif ($type=~/square/) {
1600: $currentstring .= ' \item[$\diamond$] ';
1601: } elsif ($type eq '1') {
1602: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1603: } elsif ($type eq 'A') {
1604: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1605: } elsif ($type eq 'a') {
1606: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1607: } elsif ($value ne '') {
1608: $currentstring .= ' \item['.$value.'] ';
1609: } else {
1610: $currentstring .= ' \item ';
1611: }
1612: $Apache::londefdef::list_index++;
1613: }
1614: return $currentstring;
1615: }
1616:
1617: sub end_li {
1618: my ($target,$token) = @_;
1619: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1620: if ($target eq 'web' || $target eq 'webgrade') {
1621: $currentstring .= $token->[2];
1622: }
1623: return $currentstring;
1624: }
1625:
1626: #-- <u> tag (end tag required)
1627: sub start_u {
1628: my ($target,$token) = @_;
1629: my $currentstring = '';
1630: if ($target eq 'web' || $target eq 'webgrade') {
1631: $currentstring .= $token->[4];
1632: } elsif ($target eq 'tex') {
1633: &Apache::lonxml::startredirection();
1634: }
1635: return $currentstring;
1636: }
1637:
1638: sub end_u {
1639: my ($target,$token) = @_;
1640: my $currentstring = '';
1641: if ($target eq 'web' || $target eq 'webgrade') {
1642: $currentstring .= $token->[2];
1643: } elsif ($target eq 'tex') {
1644: $currentstring=&Apache::lonxml::endredirection();
1645: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1646: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1647: $currentstring=~s/(\S)\s*$/$1\}/;
1648: }
1649: return $currentstring;
1650: }
1651:
1652: #-- <ul> tag (end tag required)
1653: sub start_ul {
1654: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1655: my $currentstring = &end_p(); # Close off enclosing list.
1656: if ($target eq 'web' || $target eq 'webgrade') {
1657: $currentstring .= $token->[4];
1658: } elsif ($target eq 'tex') {
1659: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1660: $Apache::londefdef::list_index=0;
1661: if ($TeXtype eq 'disc') {
1662: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1663: '\renewcommand{\labelitemii}{$\bullet$}'.
1664: '\renewcommand{\labelitemiii}{$\bullet$}'.
1665: '\renewcommand{\labelitemiv}{$\bullet$}';
1666: } elsif ($TeXtype eq 'circle') {
1667: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1668: '\renewcommand{\labelitemii}{$\circ$}'.
1669: '\renewcommand{\labelitemiii}{$\circ$}'.
1670: '\renewcommand{\labelitemiv}{$\circ$}';
1671: } elsif ($TeXtype eq 'square') {
1672: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1673: '\renewcommand{\labelitemii}{$\diamond$}'.
1674: '\renewcommand{\labelitemiii}{$\diamond$}'.
1675: '\renewcommand{\labelitemiv}{$\diamond$}';
1676: }
1677: $currentstring .= '\strut \begin{itemize}';
1678: }
1679: return $currentstring;
1680: }
1681:
1682: sub end_ul {
1683: my ($target,$token) = @_;
1684: my $currentstring = '';
1685: if ($target eq 'web' || $target eq 'webgrade') {
1686: $currentstring = $token->[2];
1687: } elsif ($target eq 'tex') {
1688: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1689: '\renewcommand{\labelitemii}{$\bullet$}'.
1690: '\renewcommand{\labelitemiii}{$\bullet$}'.
1691: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1692: }
1693: return $currentstring;
1694: }
1695:
1696: #-- <menu> tag (end tag required)
1697: sub start_menu {
1698: my ($target,$token) = @_;
1699: my $currentstring = '';
1700: if ($target eq 'web' || $target eq 'webgrade') {
1701: $currentstring = $token->[4];
1702: } elsif ($target eq 'tex') {
1703: $currentstring = " \\begin{itemize} ";
1704: }
1705: return $currentstring;
1706: }
1707:
1708: sub end_menu {
1709: my ($target,$token) = @_;
1710: my $currentstring = '';
1711: if ($target eq 'web' || $target eq 'webgrade') {
1712: $currentstring = $token->[2];
1713: } elsif ($target eq 'tex') {
1714: $currentstring = " \\end{itemize}";
1715: }
1716: return $currentstring;
1717: }
1718:
1719: #-- <dir> tag (end tag required)
1720: sub start_dir {
1721: my ($target,$token) = @_;
1722: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1723: if ($target eq 'web' || $target eq 'webgrade') {
1724: $currentstring .= $token->[4];
1725: } elsif ($target eq 'tex') {
1726: $currentstring .= " \\begin{itemize} ";
1727: }
1728: return $currentstring;
1729: }
1730:
1731: sub end_dir {
1732: my ($target,$token) = @_;
1733: my $currentstring = '';
1734: if ($target eq 'web' || $target eq 'webgrade') {
1735: $currentstring = $token->[2];
1736: } elsif ($target eq 'tex') {
1737: $currentstring = " \\end{itemize}";
1738: }
1739: return $currentstring;
1740: }
1741:
1742: #-- <ol> tag (end tag required)
1743: sub start_ol {
1744: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1745: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1746: if ($target eq 'web' || $target eq 'webgrade') {
1747: $currentstring .= $token->[4];
1748: } elsif ($target eq 'tex') {
1749: $Apache::londefdef::list_index=0;
1750: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1751: if ($type eq '1') {
1752: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1753: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1754: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1755: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1756: } elsif ($type eq 'A') {
1757: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1758: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1759: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1760: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1761: } elsif ($type eq 'a') {
1762: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1763: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1764: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1765: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1766: } elsif ($type eq 'i') {
1767: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1768: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1769: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1770: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1771: } elsif ($type eq 'I') {
1772: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1773: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1774: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1775: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1776: }
1777: $currentstring .= '\strut \begin{enumerate}';
1778: }
1779: return $currentstring;
1780: }
1781:
1782: sub end_ol {
1783: my ($target,$token) = @_;
1784: my $currentstring = '';
1785: if ($target eq 'web' || $target eq 'webgrade') {
1786: $currentstring = $token->[2];
1787: } elsif ($target eq 'tex') {
1788: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1789: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1790: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1791: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1792: }
1793: return $currentstring;
1794: }
1795:
1796: #-- <dl> tag (end tag required)
1797: sub start_dl {
1798: my ($target,$token) = @_;
1799: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1800: if ($target eq 'web' || $target eq 'webgrade') {
1801: $currentstring .= $token->[4];
1802: } elsif ($target eq 'tex') {
1803: $currentstring .= '\begin{description}';
1804: $Apache::londefdef::DL++;
1805: push(@Apache::londefdef::description,[]);
1806: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1807: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1808: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1809: }
1810: return $currentstring;
1811: }
1812:
1813: sub end_dl {
1814: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1815: my $currentstring = '';
1816: if ($target eq 'web' || $target eq 'webgrade') {
1817: $currentstring = $token->[2];
1818: } elsif ($target eq 'tex') {
1819: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1820: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1821: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1822: $currentstring.=' '.$element.' ';
1823: }
1824: pop(@Apache::londefdef::description);
1825: $currentstring.='\end{description}';
1826: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1827: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1828: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1829: $Apache::londefdef::DL--;
1830: }
1831: return $currentstring;
1832: }
1833:
1834: #-- <dt> tag (end tag optional)
1835: sub start_dt {
1836: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1837: my $currentstring='';
1838: if ($target eq 'web' || $target eq 'webgrade') {
1839: $currentstring = $token->[4];
1840: } elsif ($target eq 'tex') {
1841: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1842: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1843: &Apache::lonxml::startredirection();
1844: $Apache::londefdef::DT[-1]++;
1845: $Apache::londefdef::seenDT[-1]=1;
1846: }
1847: return $currentstring;
1848: }
1849:
1850: sub end_dt {
1851: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1852: my $currentstring = '';
1853: if ($target eq 'web' || $target eq 'webgrade') {
1854: $currentstring = $token->[2];
1855: } elsif ($target eq 'tex') {
1856: if ($Apache::londefdef::DT[-1]) {
1857: my $data=&item_cleanup();
1858: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1859: $Apache::londefdef::DT[-1]--;
1860: }
1861: }
1862: return $currentstring;
1863: }
1864:
1865: sub item_cleanup {
1866: my $item=&Apache::lonxml::endredirection();
1867: $item=~s/\\begin{center}//g;
1868: $item=~s/\\end{center}//g;
1869: return $item;
1870: }
1871:
1872: #-- <dd> tag (end tag optional)
1873: sub start_dd {
1874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1875: my $currentstring = '';
1876: if ($target eq 'web' || $target eq 'webgrade') {
1877: $currentstring = $token->[4];
1878: } elsif ($target eq 'tex') {
1879: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1880: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1881: if (!$Apache::londefdef::seenDT[-1]) {
1882: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1883: }
1884: push(@{$Apache::londefdef::description[-1]},'');
1885: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1886: $Apache::londefdef::DD[-1]++;
1887: &Apache::lonxml::startredirection();
1888: }
1889: return $currentstring;
1890: }
1891:
1892: sub end_dd {
1893: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1894: my $currentstring = '';
1895: if ($target eq 'web' || $target eq 'webgrade') {
1896: $currentstring = $token->[2];
1897: } elsif ($target eq 'tex') {
1898: $Apache::londefdef::description[-1]->[-1].=
1899: &Apache::lonxml::endredirection().' \vskip 0mm ';
1900: $Apache::londefdef::DD[-1]--;
1901: }
1902: return $currentstring;
1903: }
1904:
1905: #-- <table> tag (end tag required)
1906: # <table> also ends any prior <p> that is not closed.
1907: # but, unless I allow <p>'s to nest, that's the
1908: # only way I could think of to allow <p> in
1909: # <tr> <th> bodies
1910: #
1911: #list of supported attributes: border,width,TeXwidth
1912: sub start_table {
1913: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1914: my $textwidth = '';
1915: my $currentstring = &end_p();
1916: if ($target eq 'web' || $target eq 'webgrade') {
1917: $currentstring .= $token->[4];
1918: } elsif ($target eq 'tex') {
1919: my $aa = {};
1920: push @Apache::londefdef::table, $aa;
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: $currentstring.='\keephidden{NEW TABLE ENTRY}';
1995:
1996:
1997: }
1998: return $currentstring;
1999: }
2000:
2001: sub end_table {
2002: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2003: my $currentstring = '';
2004: if ($target eq 'web' || $target eq 'webgrade') {
2005: $currentstring = $token->[2];
2006: } elsif ($target eq 'tex') {
2007: my $inmemory = '';
2008: my $output = '';
2009: my $WARNING='';
2010: #width of columns from TeXwidth attributes
2011:
2012: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2013: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2014: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2015: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2016: }
2017: }
2018: }
2019: #free space and number of empty columns
2020: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2021: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2022: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2023: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2024: $empty_columns++;
2025: } else {
2026: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2027: }
2028: }
2029: #boundaries for contents columns
2030: my @min_len=();#columns can not be narrower
2031: my @max_len=();#maximum length of column
2032: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2033: my ($localmin,$localmax)=(0,0);
2034: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2035: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2036: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2037: }
2038: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2039: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2040: }
2041: }
2042: push @min_len, $localmin;
2043: push @max_len, $localmax;
2044: }
2045: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2046: my $localmin=0,;
2047: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2048: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2049: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2050: }
2051: }
2052: if ($max_len[$jn]<$localmin) {
2053: $max_len[$jn]=$localmin;
2054: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2055: }#object size is bigger
2056: if ($min_len[$jn]<$localmin) {
2057: $min_len[$jn]=$localmin;
2058: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2059: }#object size is bigger
2060: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2061: $min_len[$jn]=0;
2062: $max_len[$jn]=0;
2063: }
2064: }
2065: #final adjustment of column width
2066: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2067: my @adjust=();
2068: #step 1. adjustment by maximum value
2069: my $space_neeeded=0;
2070: for (my $jn=0;$jn<=$#max_len;$jn++) {
2071: $space_neeeded=$space_neeeded+$max_len[$jn];
2072: }
2073: if ($space_neeeded<=$available_space) {
2074: for (my $jn=0;$jn<=$#max_len;$jn++) {
2075: if ($fwidth[$jn]==0) {
2076: $fwidth[$jn]=$max_len[$jn];
2077: }
2078: }
2079: } else {
2080: #step 2. adjustment by minimum value (estimation)
2081: $space_neeeded=0;
2082: for (my $jn=0;$jn<=$#min_len;$jn++) {
2083: $space_neeeded+=$min_len[$jn];
2084: }
2085: if ($space_neeeded>$available_space) {
2086: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2087: for (my $jn=0;$jn<=$#max_len;$jn++) {
2088: if ($fwidth[$jn]==0) {
2089: $fwidth[$jn]=$min_len[$jn];
2090: }
2091: }
2092: #check if we have objects which can be scaled
2093: my $how_many_to_scale=0;
2094: my @to_scale=();
2095: for (my $jn=0;$jn<=$#max_len;$jn++) {
2096: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2097: $how_many_to_scale++;
2098: push @to_scale, $jn;
2099: }
2100: }
2101: if ($how_many_to_scale>0) {
2102: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2103: foreach my $jn (@to_scale) {
2104: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2105: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2106: if ($1 ne '') {
2107: my $current_length=&recalc($1);
2108: $current_length=~/(\d+\.?\d*)/;
2109: $current_length=$current_length-$space_to_adjust;
2110: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2111: }
2112: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2113: if ($1 ne '') {
2114: my $current_length=$1;
2115: $current_length=$current_length-$space_to_adjust;
2116: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2117: }
2118: }
2119: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2120: }
2121: }
2122: } else {
2123: #step 3. adjustment over minimal + corrections
2124: my $enlarge_coef=$available_space/$space_neeeded;
2125: my $acsessive=0;
2126: for (my $jn=0;$jn<=$#min_len;$jn++) {
2127: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2128: if ($adjust[$jn]>$max_len[$jn]) {
2129: $fwidth[$jn]=$max_len[$jn];
2130: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2131: $adjust[$jn]=0;
2132: }
2133: }
2134: if ($acsessive>0) {
2135: #we have an excess of space and can redistribute it
2136: my $notempty_columns=0;
2137: for (my $jn=0;$jn<=$#min_len;$jn++) {
2138: if ($adjust[$jn]!=0) {
2139: $notempty_columns++;
2140: }
2141: }
2142: my $per_column=$acsessive/$notempty_columns;
2143: for (my $jn=0;$jn<=$#min_len;$jn++) {
2144: if ($adjust[$jn]!=0) {
2145: $adjust[$jn]+=$per_column;
2146: $fwidth[$jn]=$adjust[$jn];
2147: }
2148: }
2149: } else {
2150: for (my $jn=0;$jn<=$#min_len;$jn++) {
2151: $fwidth[$jn]=$adjust[$jn];
2152: }
2153: }
2154: }
2155: }
2156: #use all available width if it is defined in % or as TeXwidth
2157: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2158: my $current=0;
2159: for (my $i=0;$i<=$#fwidth;$i++) {
2160: $current+=$fwidth[$i];
2161: }
2162: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2163: for (my $i=0;$i<=$#fwidth;$i++) {
2164: $fwidth[$i]*=$coef;
2165: }
2166: }
2167: #removing of empty columns if allowed
2168: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2169: if ($permission eq 'yes') {
2170: my @cleaned_table=();
2171: my @cleaned_header=();
2172: my $colind=0;
2173: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2174: if ($fwidth[$jn]!=0) {
2175: #we need to copy column
2176: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2177: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2178: $cleaned_header[$colind]=$fwidth[$jn];
2179: }
2180: $colind++;
2181: }
2182: }
2183: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2184: @fwidth=@cleaned_header;
2185: }
2186: #construct header of the table
2187: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2188: for (my $in=0;$in<=$#fwidth;$in++) {
2189: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2190: }
2191: $header_of_table .= '}';
2192: #fill the table
2193: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2194: my $have_rowspan = 0;
2195: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2196:
2197: #-----------------------------------------------------------
2198: # I think this order of doing things will ensure that
2199: # single rowspan, columspan and combined row/colspans will
2200: # work correctly. LaTeX is delicate here.
2201: # RF.
2202:
2203: # Start a rowspan if necessary:
2204:
2205: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2206: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2207: #
2208: # Do the appropriate magic if this has a colspan
2209: #
2210:
2211: if ($colspan > 1) {
2212: my $spanwidth = 0;
2213: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2214: $spanwidth += $fwidth[$spancol];
2215: }
2216: $output .= '\multicolumn{'.
2217: $colspan
2218: ."}";
2219: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2220: $output .= '{|c|}{';
2221: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2222: $output .= '{|r|}{';
2223: }
2224: else {
2225: $output .= "{|p{$spanwidth mm}|}{";
2226: }
2227:
2228: }
2229:
2230: # Rowspan... if colspan is 1, and there's an alignment we'll need
2231: # to kick in a multicolumn in order to get the alignment spec.
2232: # this must precede the multirow or LaTex gets quite upset.
2233: # Naturally if colspan > 1 we've already done that above ^
2234: #
2235: my $multirow_aligned = 0;
2236: if ($rowspan > 1) {
2237: if ($colspan == 1) {
2238: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2239: $output .= '\multicolumn{1}{|c|}{';
2240: $multirow_aligned = 1;
2241: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2242: $output .= '\multicolumn{1}{|r|}{';
2243: $multirow_aligned = 1;
2244: }
2245: }
2246: $have_rowspan++;
2247: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2248: #
2249: # If we did not throw in a multicolumn to align, then add
2250: # an extra {
2251: # so we close correctly without having to keep additional state
2252: # around
2253: #
2254: if (!$multirow_aligned) {
2255: $output .= '{';
2256: }
2257: }
2258: if (($rowspan eq '^') || ($rowspan eq '_')) {
2259: $have_rowspan++;
2260: }
2261: #--------------------------------------------------------------
2262:
2263:
2264: # For right and center alignment of single cells.
2265: # we are going to use a multicolumn with a span of 1 to specify alignment.
2266: #
2267: if ($colspan == 1 && $rowspan == 1) {
2268: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2269: $output .= '\multicolumn{1}{|c|}{';
2270: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2271: $output .= '\multicolumn{1}{|r|}{';
2272: }
2273: }
2274:
2275: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2276:
2277: if (($colspan == 1 && $rowspan == 1) &&
2278: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2279: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2280: $output .= '}';
2281: }
2282:
2283: # Close off any open multirow:
2284:
2285: if ($rowspan > 1) {
2286: $output .= '}}';
2287: }
2288: # Close off the colspan...
2289: #
2290: if ($colspan > 1) {
2291: $output .= '}';
2292: $jn += $colspan-1; # Adjust for number of rows really left.
2293: }
2294: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2295: }
2296: # If have_rowspan > 0, and borders are on, then
2297: # we need to do more than put an \hline at the bottom of row.
2298: # we need to do the appropriate \cline to ensure that
2299: # the spanned rows don't have \hlines through them.
2300:
2301: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2302: $output .= ' \\\\ ';
2303: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2304: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2305: if ($rowspan ne "^") {
2306: if (($rowspan <= 1) || ($rowspan eq '_')) {
2307: my $column = $jn+1;
2308: $output .= '\cline{'.$column.'-'.$column.'} ';
2309: }
2310: }
2311: }
2312:
2313: } else {
2314: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2315: }
2316: }
2317: # Note that \newline destroys alignment env's produced by e.g. <div>
2318: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2319: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2320: if ($#Apache::londefdef::table > 0) {
2321: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2322: # Figure out max/and min width by summing us and then
2323: # apply that to the current column of the table we nest in
2324: # if it's larger than the current width or the current width
2325: # is undefined.
2326: #
2327: my $min_nested_width = 0;
2328: my $max_nested_width = 0;
2329: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2330: $min_nested_width += $min_len[$col];
2331: $max_nested_width += $max_len[$col];
2332:
2333: }
2334: # Fudge in an extra 5 mm for borders etc:
2335:
2336: $min_nested_width += 5;
2337: $max_nested_width += 5;
2338:
2339: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2340: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2341: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2342: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2343: }
2344: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2345: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2346: }
2347:
2348: pop @Apache::londefdef::table;
2349: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2350: } else {
2351: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2352: pop @Apache::londefdef::table;
2353: undef @Apache::londefdef::table;
2354: }
2355: }
2356: return $currentstring;
2357: }
2358:
2359: #-- <tr> tag (end tag optional)
2360: sub start_tr {
2361: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2362: my $currentstring = '';
2363: if ($target eq 'web' || $target eq 'webgrade') {
2364: $currentstring = $token->[4];
2365: } elsif ($target eq 'tex') {
2366: $Apache::londefdef::table[-1]{'row_number'}++;
2367: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2368: if ($alignchar ne '') {
2369: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2370: } else {
2371: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2372: }
2373: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2374: #
2375: # Need to save the number of table columns to preserve the max # columns.
2376: #
2377: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2378: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2379: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2380: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2381: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2382: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2383: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2384: }
2385: return $currentstring;
2386: }
2387:
2388: sub end_tr {
2389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2390: my $currentstring = &end_p(); # Close any pending <p> in the row.
2391: if ($target eq 'web' || $target eq 'webgrade') {
2392: $currentstring .= $token->[2];
2393: } elsif ($target eq 'tex') {
2394: if ($Apache::londefdef::TD_redirection) {
2395: &end_td_tex($parstack,$parser,$safeeval);
2396: }
2397: # Counter columns must be the maximum number of columns seen
2398: # in the table so far so:
2399: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2400: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2401: }
2402:
2403:
2404:
2405: }
2406: return $currentstring;
2407: }
2408:
2409: #-- <td> tag (end tag optional)
2410: sub start_td {
2411: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2412: my $currentstring = '';
2413: if ($target eq 'web' || $target eq 'webgrade') {
2414: $currentstring = $token->[4];
2415: } elsif ($target eq 'tex') {
2416: $Apache::londefdef::TD_redirection = 1;
2417: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2418: }
2419: return $currentstring;
2420: }
2421:
2422: sub tag_check {
2423: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2424: my @ar=@$parstack;
2425: for (my $i=$#ar-1;$i>=0;$i--) {
2426: if (lc($$tagstack[$i]) eq $good_tag) {
2427: &start_td_tex($parstack,$parser,$safeeval);
2428: last;
2429: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2430: splice @ar, $i+1;
2431: &end_td_tex(\@ar,$parser,$safeeval);
2432: &start_td_tex($parstack,$parser,$safeeval);
2433: last;
2434: }
2435: }
2436: return '';
2437: }
2438:
2439: sub start_td_tex {
2440: my ($parstack,$parser,$safeeval) = @_;
2441: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2442: if ($alignchar eq '') {
2443: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2444: }
2445: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2446: $Apache::londefdef::table[-1]{'counter_columns'}++;
2447: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2448: if (defined $TeXwidth) {
2449: my $current_length=&recalc($TeXwidth);
2450: $current_length=~/(\d+\.?\d*)/;
2451: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2452: }
2453: &Apache::lonxml::startredirection();
2454: return '';
2455: }
2456:
2457: sub end_td_tex {
2458: my ($parstack,$parser,$safeeval) = @_;
2459: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2460: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2461: my $data = &Apache::lonxml::endredirection();
2462:
2463: # The rowspan array of the table indicates which cells are part of a span.
2464: # n indicates the start of a span set of n rows.
2465: # ^ indicates a cell that continues a span set.
2466: # _ indicates the cell is at the bottom of a span set.
2467: # If this and subsequent cells are part of a rowspan, we must
2468: # push along the row until we find one that is not.
2469:
2470: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2471: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2472: # Part of a span.
2473: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2474: $current_column++;
2475: }
2476: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2477:
2478:
2479: # Get the column and row spans.
2480: # Colspan can be done via \multicolumn if I can figure out the data structs.
2481:
2482: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2483: if (!$colspan) {
2484: $colspan = 1;
2485: }
2486:
2487: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2488: if (!$rowspan) {
2489: $rowspan = 1;
2490: }
2491:
2492:
2493:
2494: for (my $c = 0; $c < $colspan; $c++) {
2495: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2496: for (my $i = 1; $i < $rowspan; $i++) {
2497: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2498: if ($i == ($rowspan-1)) {
2499: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2500: }
2501: }
2502: }
2503:
2504: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2505: if (defined $TeXwidth) {
2506: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2507: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2508: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2509: } else {
2510: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2511: my $garbage_data=$data;
2512: my $fwidth=0;
2513: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2514: my $current_length=&recalc($1);
2515: $current_length=~/(\d+\.?\d*)/;
2516: if ($fwidth<$1) {$fwidth=$1;}
2517: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2518: }
2519: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2520: my $current_length=$1;
2521: if ($fwidth<$current_length) {$fwidth=$current_length;}
2522: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2523: }
2524: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2525: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2526: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2527: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2528: } elsif ($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)*/) {
2529: my $garbage_data=$data;
2530: my $fwidth=0;
2531: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2532: my $current_length=&recalc($1);
2533: $current_length=~/(\d+\.?\d*)/;
2534: if ($fwidth<$1) {$fwidth=$1;}
2535: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2536: }
2537: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2538: my $current_length=&recalc($1);
2539: $current_length=~/(\d+\.?\d*)/;
2540: if ($fwidth<$1) {$fwidth=$1;}
2541: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2542: }
2543: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2544: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2545: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2546: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2547: $data=~s/\\\\\s*$//;
2548: } else {
2549: $data=~s/^\s+(\S.*)/$1/;
2550: $data=~s/(.*\S)\s+$/$1/;
2551: $data=~s/(\s)+/$1/;
2552: my ($current_length,$min_length)=(0,0);
2553: if ($data=~/\\vskip/) {
2554: my $newdata=$data;
2555: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2556: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2557: foreach my $elementdata (@newdata) {
2558: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2559: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2560: my @words=split(/ /,$elementdata);
2561: foreach my $word (@words) {
2562: my $lengthword=2.5*&LATEX_length($word);
2563: if ($min_length<$lengthword) {$min_length=$lengthword;}
2564: }
2565: }
2566: } else {
2567: $current_length=2.5*&LATEX_length($data);
2568: my @words=split(/ /,$data);
2569: foreach my $word (@words) {
2570: my $lengthword=2*&LATEX_length($word);
2571: if ($min_length<$lengthword) {$min_length=$lengthword;}
2572: }
2573: }
2574: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2575: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2576: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2577: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2578: }
2579: }
2580: # Substitute all of the tables nested in this cell in their appropriate places.
2581:
2582:
2583: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2584: for (my $in=0; $in<=$nested_count; $in++) {
2585: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2586: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2587: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2588: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2589:
2590: }
2591: # Should be be killing off the 'include' elements as they're used up?
2592:
2593: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2594:
2595:
2596:
2597:
2598: # the colspan array will indicate how many columns will be spanned by this
2599: # cell..this requires that counter_columns also be adjusted accordingly
2600: # so that the next bunch of text goes in the right cell. Note that since
2601: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2602: #
2603:
2604: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2605: for (my $i = 0; $i < ($colspan -1); $i++) {
2606: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2607: }
2608: for (my $r = 0; $r < $rowspan; $r++) {
2609: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2610: # Put empty text in spanned cols.
2611:
2612: }
2613:
2614:
2615:
2616: return '';
2617: }
2618:
2619: sub end_td {
2620: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2621: my $currentstring = '';
2622: if ($target eq 'web' || $target eq 'webgrade') {
2623: $currentstring = $token->[2];
2624: } elsif ($target eq 'tex') {
2625: $Apache::londefdef::TD_redirection =0;
2626: &end_td_tex($parstack,$parser,$safeeval);
2627: }
2628: return $currentstring;
2629: }
2630:
2631: #-- <th> tag (end tag optional)
2632: sub start_th {
2633: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2634: my $currentstring = '';
2635: if ($target eq 'web' || $target eq 'webgrade') {
2636: $currentstring = $token->[4];
2637: } elsif ($target eq 'tex') {
2638: $Apache::londefdef::TD_redirection = 1;
2639: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2640: }
2641: return $currentstring;
2642: }
2643:
2644: sub tagg_check {
2645: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2646: my @ar=@$parstack;
2647: for (my $i=$#ar-1;$i>=0;$i--) {
2648: if (lc($$tagstack[$i]) eq $good_tag) {
2649: &start_th_tex($parstack,$parser,$safeeval);
2650: last;
2651: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2652: splice @ar, $i+1;
2653: &end_th_tex(\@ar,$parser,$safeeval);
2654: &start_th_tex($parstack,$parser,$safeeval);
2655: last;
2656: }
2657: }
2658: return '';
2659: }
2660:
2661: sub start_th_tex {
2662: my ($parstack,$parser,$safeeval) = @_;
2663: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2664: if ($alignchar eq '') {
2665: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2666: }
2667: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2668: $Apache::londefdef::table[-1]{'counter_columns'}++;
2669: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2670: if (defined $TeXwidth) {
2671: my $current_length=&recalc($TeXwidth);
2672: $current_length=~/(\d+\.?\d*)/;
2673: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2674: }
2675: &Apache::lonxml::startredirection();
2676: return '';
2677: }
2678:
2679: sub end_th_tex {
2680: my ($parstack,$parser,$safeeval) = @_;
2681: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2682: my $data=&Apache::lonxml::endredirection();
2683: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2684: if (defined $TeXwidth) {
2685: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2686: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2687: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2688: } else {
2689: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2690: my $garbage_data=$data;
2691: my $fwidth=0;
2692: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2693: my $current_length=&recalc($1);
2694: $current_length=~/(\d+\.?\d*)/;
2695: if ($fwidth<$1) {$fwidth=$1;}
2696: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2697: }
2698: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2699: my $current_length=$1;
2700: if ($fwidth<$current_length) {$fwidth=$current_length;}
2701: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2702: }
2703: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2704: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2705: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2706: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2707: } else {
2708: $data=~s/^\s+(\S.*)/$1/;
2709: $data=~s/(.*\S)\s+$/$1/;
2710: $data=~s/(\s)+/$1/;
2711: my ($current_length,$min_length)=(0,0);
2712: if ($data=~/\\vskip/) {
2713: my $newdata=$data;
2714: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2715: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2716: foreach my $elementdata (@newdata) {
2717: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2718: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2719: my @words=split(/ /,$elementdata);
2720: foreach my $word (@words) {
2721: my $lengthword=2.5*&LATEX_length($word);
2722: if ($min_length<$lengthword) {$min_length=$lengthword;}
2723: }
2724: }
2725: } else {
2726: $current_length=2.5*&LATEX_length($data);
2727: my @words=split(/ /,$data);
2728: foreach my $word (@words) {
2729: my $lengthword=2*&LATEX_length($word);
2730: if ($min_length<$lengthword) {$min_length=$lengthword;}
2731: }
2732: }
2733: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2734: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2735: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2736: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2737: }
2738: }
2739: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2740: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2741: }
2742: #make data bold
2743: $data='\textbf{'.$data.'}';
2744: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2745: return'';
2746: }
2747:
2748: sub end_th {
2749: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2750: my $currentstring = &end_p(); # Close any open <p> in the row.
2751: if ($target eq 'web' || $target eq 'webgrade') {
2752: $currentstring .= $token->[2];
2753: } elsif ($target eq 'tex') {
2754: $Apache::londefdef::TD_redirection =0;
2755: &end_th_tex($parstack,$parser,$safeeval);
2756: }
2757: return $currentstring;
2758: }
2759:
2760: #-- <img> tag (end tag forbidden)
2761: #
2762: # Render the <IMG> tag.
2763: # <IMG> has the following attributes (in addition to the
2764: # standard HTML ones:
2765: # TeXwrap - Governs how the tex target will try to wrap text around
2766: # horizontally aligned images.
2767: # TeXwidth - The width of the image when rendered for print (mm).
2768: # TeXheight - The height of the image when rendered for print (mm)
2769: # (Note there seems to also be support for this as a % of page size)
2770: #
2771: sub start_img {
2772: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2773: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2774: undef,1);
2775: if (! $src &&
2776: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2777: ) {
2778: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2779: return '';
2780: }
2781: &Apache::lonxml::extlink($src);
2782: my $currentstring = '';
2783: my $scaling = .3;
2784:
2785: # Render unto browsers that which are the browser's...
2786:
2787: if ($target eq 'web' || $target eq 'webgrade') {
2788: if ($env{'browser.imagesuppress'} ne 'on') {
2789: my $enc = ('yes' eq
2790: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2791: $safeeval)));
2792: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2793: $enc);
2794: } else {
2795: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2796: undef,1);
2797: if (!$alttag) {
2798: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2799: $src);
2800: }
2801: $currentstring.='[IMAGE: '.$alttag.']';
2802: }
2803:
2804: # and render unto TeX that which is LaTeX
2805:
2806: } elsif ($target eq 'tex') {
2807: #
2808: # The alignment will require some superstructure to be put around
2809: # the \includegraphics stuff. At present we can only partially
2810: # simulate the alignments offered by html.
2811: #
2812: #
2813: my $align = lc(&Apache::lonxml::get_param('align',
2814: $parstack,
2815: $safeeval,
2816: undef,1));
2817: if(!$align) {
2818: $align = "bottom"; # This is html's default so it's ours too.
2819: }
2820: #
2821: &Apache::lonxml::debug("Alignemnt = $align");
2822: # LaTeX's image/text wrapping is really bad since it wants to
2823: # make figures float.
2824: # The user has the optional parameter (applicable only to l/r
2825: # alignment to use the picins/parpic directive to get wrapped text
2826: # this is also imperfect.. that's why we give them a choice...
2827: # so they can't yell at us for our choice.
2828: #
2829: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2830: $parstack,
2831: $safeeval,
2832: undef,0);
2833: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2834: if(!$latex_rendering) {
2835: $latex_rendering = "texwrap";
2836: }
2837: # using texwrap inside a table does not work. So, if after all of this,
2838: # texwrap is on, we turn it off if we detect we're in a table:
2839: #
2840: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2841: $latex_rendering = 'parpic';
2842: }
2843:
2844: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2845:
2846: #if original gif/jpg/png file exist do following:
2847: my $origsrc=$src;
2848: my ($path,$file) = &get_eps_image($src);
2849: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2850: &Apache::lonxml::debug("path = $path file = $file src = $src");
2851: if (-e $src) {
2852: &Apache::lonxml::debug("$src exists");
2853: my ($height_param,$width_param)=
2854: &image_size($origsrc,0.3,$parstack,$safeeval);
2855: my $destpath = $path;
2856: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2857: my $destfile = $file;
2858: $destfile =~ s/ /\_/g;
2859: my $size;
2860: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2861: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2862: $size='['.$size;
2863: $size=~s/,$/]/;
2864: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2865: .'\includegraphics'.$size.'{'.$destfile.'} ';
2866:
2867: # If there's an alignment specification we need to honor it here.
2868: # For the horizontal alignments, we will also honor the
2869: # value of the latex specfication. The default is parbox,
2870: # and that's used for illegal values too.
2871: #
2872: # Even though we set a default alignment value, the user
2873: # could have given us an illegal value. In that case we
2874: # just use the default alignment of bottom..
2875: if ($align eq "top") {
2876: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2877: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2878: my $offset = $height_param/2;
2879: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2880: } elsif ($align eq "left") {
2881: if ($latex_rendering eq "parpic") {
2882: $currentstring = '\parpic[l]{'.$currentstring.'}';
2883: } else { # wrapfig render
2884: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2885: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2886: }
2887: } elsif ($align eq "right") {
2888: if ($latex_rendering eq "parpic") {
2889: $currentstring = '\parpic[r]{'.$currentstring.'}';
2890: } else { # wrapfig rendering
2891: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2892: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2893:
2894: }
2895: } else { # Bottom is also default.
2896: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2897: }
2898: } else {
2899: &Apache::lonxml::debug("$src does not exist");
2900: #original image file doesn't exist so check the alt attribute
2901: my $alt =
2902: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2903: unless ($alt) {
2904: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2905: }
2906:
2907: if ($alt) { $currentstring .= ' '.$alt.' '; }
2908: }
2909:
2910: # And here's where the semi-quote breaks down: allow the user
2911: # to edit the beast as well by rendering the problem for edit:
2912: } elsif ($target eq 'edit') {
2913: $currentstring .=&Apache::edit::tag_start($target,$token);
2914: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2915: &Apache::edit::browse('src',undef,'alt').' '.
2916: &Apache::edit::search('src',undef,'alt').'<br />';
2917: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2918: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2919: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2920: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2921: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2922: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2923: ['','bottom','middle','top','left','right'],$token,5);
2924: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2925: ['', 'parbox', 'parpic'], $token, 2);
2926: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2927: ['no','yes'], $token, 2);
2928: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2929: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2930: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2931: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2932: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2933:
2934:
2935: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2936: if ($width) { $currentstring.=' width="'.$width.'" '; }
2937: if ($height) { $currentstring.=' height="'.$height.'" '; }
2938: $currentstring .= ' />';
2939: } elsif ($target eq 'modified') {
2940: my ($osrc,$owidth,$oheight)=
2941: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2942: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2943: $safeeval,'src','alt','align',
2944: 'TeXwidth','TeXheight', 'TeXwrap',
2945: 'width','height','encrypturl');
2946: my ($nsrc,$nwidth,$nheight)=
2947: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2948: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2949: &image_replication($loc);
2950: my ($iwidth,$iheight);
2951: if (-e $loc) {
2952: my $image = Image::Magick->new;
2953: $image->Read($loc);
2954: ($iwidth, $iheight) = ($image->Get('width'),
2955: $image->Get('height'));
2956: }
2957: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2958: # changed image or no size specified,
2959: # if they didn't explicitly change the
2960: # width or height use the ones from the image
2961: if ($iwidth && $iheight) {
2962: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2963: $token->[2]{'width'} = $iwidth;$ctag=1;
2964: }
2965: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2966: $token->[2]{'height'}=$iheight;$ctag=1;
2967: }
2968: }
2969: }
2970: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2971: # if we don't have a width or height
2972: if ($iwidth && $cwidth && !$cheight) {
2973: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2974: }
2975: if ($iheight && $cheight && !$cwidth) {
2976: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2977: }
2978: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2979: }
2980:
2981: return $currentstring;
2982: }
2983:
2984: sub end_img {
2985: my ($target,$token) = @_;
2986: my $currentstring = '';
2987: if ($target eq 'web' || $target eq 'webgrade') {
2988: $currentstring = $token->[2];
2989: } elsif ($target eq 'tex') {
2990: $currentstring = '';
2991: }
2992: return $currentstring;
2993: }
2994:
2995: #-- <applet> tag (end tag required)
2996: sub start_applet {
2997: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2998:
2999: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3000: &Apache::lonxml::extlink($code);
3001: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3002: undef,1);
3003: &Apache::lonxml::extlink($archive);
3004: my $currentstring = '';
3005: if ($target eq 'web' || $target eq 'webgrade') {
3006: if ($env{'browser.appletsuppress'} ne 'on') {
3007: $currentstring = &Apache::lonenc::encrypt_ref($token,
3008: {'code'=>$code,
3009: 'archive'=>$archive}
3010: );
3011: } else {
3012: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3013: $safeeval,undef,1);
3014: unless ($alttag) {
3015: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3016: $code);
3017: }
3018: $currentstring='[APPLET: '.$alttag.']';
3019: }
3020: } elsif ($target eq 'tex') {
3021: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3022: $safeeval,undef,1);
3023: unless ($alttag) {
3024: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3025: undef,1);
3026: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3027: $code);
3028: }
3029: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3030: '.}\end{center}';
3031: }
3032: return $currentstring;
3033: }
3034:
3035: sub end_applet {
3036: my ($target,$token) = @_;
3037: my $currentstring = '';
3038: if ($target eq 'web' || $target eq 'webgrade') {
3039: $currentstring = $token->[2];
3040: } elsif ($target eq 'tex') {
3041: }
3042: return $currentstring;
3043: }
3044:
3045: #-- <embed> tag (end tag optional/required)
3046: sub start_embed {
3047: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3048: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3049: &Apache::lonxml::extlink($src);
3050: my $currentstring = '';
3051: if ($target eq 'web' || $target eq 'webgrade') {
3052: if ($env{'browser.embedsuppress'} ne 'on') {
3053: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3054: } else {
3055: my $alttag=&Apache::lonxml::get_param
3056: ('alt',$parstack,$safeeval,undef,1);
3057: unless ($alttag) {
3058: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3059: }
3060: $currentstring='[EMBED: '.$alttag.']';
3061: }
3062: } elsif ($target eq 'tex') {
3063: }
3064: return $currentstring;
3065: }
3066:
3067: sub end_embed {
3068: my ($target,$token) = @_;
3069: my $currentstring = '';
3070: if ($target eq 'web' || $target eq 'webgrade') {
3071: $currentstring = $token->[2];
3072: } elsif ($target eq 'tex') {
3073: }
3074: return $currentstring;
3075: }
3076:
3077: #-- <param> tag (end tag forbidden)
3078: sub start_param {
3079: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3080: if (&Apache::lonxml::get_param('name',$parstack,
3081: $safeeval,undef,1)=~/^cabbase$/i) {
3082: my $value=&Apache::lonxml::get_param('value',$parstack,
3083: $safeeval,undef,1);
3084: &Apache::lonxml::extlink($value);
3085: }
3086:
3087: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3088: &Apache::lonxml::extlink($src);
3089: my $currentstring = '';
3090: if ($target eq 'web' || $target eq 'webgrade') {
3091: my %toconvert;
3092: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3093: if ($src) { $toconvert{'src'}= $src; }
3094: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3095: undef,1);
3096: if ($name=~/^cabbase$/i) {
3097: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3098: $safeeval,undef,1);
3099: }
3100: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3101: } elsif ($target eq 'tex') {
3102: }
3103: return $currentstring;
3104: }
3105:
3106: sub end_param {
3107: my ($target,$token) = @_;
3108: my $currentstring = '';
3109: if ($target eq 'web' || $target eq 'webgrade') {
3110: $currentstring = $token->[2];
3111: } elsif ($target eq 'tex') {
3112: }
3113: return $currentstring;
3114: }
3115:
3116: #-- <allow> tag
3117: sub start_allow {
3118: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3119: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3120: &Apache::lonxml::extlink($src);
3121:
3122: if ($target eq 'tex') { &image_replication($src); }
3123: my $result;
3124: if ($target eq 'edit') {
3125: $result .=&Apache::edit::tag_start($target,$token);
3126: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3127: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3128: } elsif ($target eq 'modified') {
3129: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3130: $safeeval,'src');
3131: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3132: }
3133: return $result;
3134: }
3135:
3136: sub end_allow {
3137: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3138: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3139: return '';
3140: }
3141:
3142: #-- Frames (end tag required)
3143: #-- <frameset>
3144: sub start_frameset {
3145: my ($target,$token) = @_;
3146: my $currentstring = ''; # Close any pending para.
3147: if ($target eq 'web' || $target eq 'webgrade') {
3148: $currentstring =
3149: &Apache::loncommon::start_page($Apache::londefdef::title,
3150: $Apache::londefdef::head,
3151: {'add_entries' => $token->[2],
3152: 'no_title' => 1,
3153: 'force_register' => 1,
3154: 'frameset' => 1,});
3155:
3156: }
3157: return $currentstring;
3158: }
3159:
3160: sub end_frameset {
3161: my ($target,$token) = @_;
3162: my $currentstring = '';
3163: if ($target eq 'web' || $target eq 'webgrade') {
3164: $currentstring = $token->[2];
3165: }
3166: return $currentstring;
3167: }
3168:
3169: #-- <xmp> (end tag required)
3170: sub start_xmp {
3171: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3172: my $currentstring = '';
3173: if ($target eq 'web' || $target eq 'webgrade') {
3174: $currentstring .= $token->[4];
3175: } elsif ($target eq 'tex') {
3176: $currentstring .= '\begin{verbatim}';
3177: }
3178: return $currentstring;
3179: }
3180:
3181: sub end_xmp {
3182: my ($target,$token) = @_;
3183: my $currentstring = '';
3184: if ($target eq 'web' || $target eq 'webgrade') {
3185: $currentstring .= $token->[2];
3186: } elsif ($target eq 'tex') {
3187: $currentstring .= '\end{verbatim}';
3188: }
3189: return $currentstring;
3190: }
3191:
3192: #-- <pre> (end tag required)
3193: sub start_pre {
3194: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3195: my $currentstring = &end_p(); # close off pending <p>
3196: if ($target eq 'web' || $target eq 'webgrade') {
3197: $currentstring .= $token->[4];
3198: } elsif ($target eq 'tex') {
3199: $currentstring .= '\begin{verbatim}';
3200: &Apache::lonxml::disable_LaTeX_substitutions();
3201: }
3202: return $currentstring;
3203: }
3204:
3205: sub end_pre {
3206: my ($target,$token) = @_;
3207: my $currentstring = '';
3208: if ($target eq 'web' || $target eq 'webgrade') {
3209: $currentstring .= $token->[2];
3210: } elsif ($target eq 'tex') {
3211: $currentstring .= '\end{verbatim}';
3212: &Apache::lonxml::enable_LaTeX_substitutions();
3213: }
3214: return $currentstring;
3215: }
3216:
3217: #-- <insert>
3218: sub start_insert {
3219: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3220: my $currentstring = '';
3221: if ($target eq 'web' || $target eq 'webgrade') {
3222: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3223: $currentstring .= '<b>'.$display.'</b>';;
3224: }
3225: return $currentstring;
3226: }
3227:
3228: sub end_insert {
3229: my ($target,$token) = @_;
3230: my $currentstring = '';
3231: if ($target eq 'web' || $target eq 'webgrade') {
3232: $currentstring .= '';
3233: }
3234: return $currentstring;
3235: }
3236:
3237: #-- <externallink>
3238: sub start_externallink {
3239: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3240: my $currentstring = '';
3241: if ($target eq 'web' || $target eq 'webgrade') {
3242: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3243: $currentstring .= '<b>'.$display.'</b>';;
3244: }
3245: return $currentstring;
3246: }
3247:
3248: sub end_externallink {
3249: my ($target,$token) = @_;
3250: my $currentstring = '';
3251: if ($target eq 'web' || $target eq 'webgrade') {
3252: $currentstring .= '';
3253: }
3254: return $currentstring;
3255: }
3256:
3257: #-- <blankspace heigth="">
3258: sub start_blankspace {
3259: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3260: my $currentstring = &end_p(); # closes off any unclosed <p>
3261: if ($target eq 'tex') {
3262: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3263: $currentstring .= '\vskip '.$howmuch.' ';
3264: }
3265: return $currentstring;
3266: }
3267:
3268: sub end_blankspace {
3269: my ($target,$token) = @_;
3270: my $currentstring = '';
3271: if ($target eq 'tex') {
3272: $currentstring .= '';
3273: }
3274: return $currentstring;
3275: }
3276:
3277: #-- <abbr> tag (end tag required)
3278: sub start_abbr {
3279: my ($target,$token) = @_;
3280: my $currentstring = '';
3281: if ($target eq 'web' || $target eq 'webgrade') {
3282: $currentstring = $token->[4];
3283: }
3284: return $currentstring;
3285: }
3286:
3287: sub end_abbr {
3288: my ($target,$token) = @_;
3289: my $currentstring = '';
3290: if ($target eq 'web' || $target eq 'webgrade') {
3291: $currentstring = $token->[2];
3292: }
3293: return $currentstring;
3294: }
3295:
3296: #-- <acronym> tag (end tag required)
3297: sub start_acronym {
3298: my ($target,$token) = @_;
3299: my $currentstring = '';
3300: if ($target eq 'web' || $target eq 'webgrade') {
3301: $currentstring = $token->[4];
3302: }
3303: return $currentstring;
3304: }
3305:
3306: sub end_acronym {
3307: my ($target,$token) = @_;
3308: my $currentstring = '';
3309: if ($target eq 'web' || $target eq 'webgrade') {
3310: $currentstring = $token->[2];
3311: }
3312: return $currentstring;
3313: }
3314:
3315: #-- <area> tag (end tag forbidden)
3316: sub start_area {
3317: my ($target,$token) = @_;
3318: my $currentstring = '';
3319: if ($target eq 'web' || $target eq 'webgrade') {
3320: $currentstring = $token->[4];
3321: }
3322: return $currentstring;
3323: }
3324:
3325: sub end_area {
3326: my ($target,$token) = @_;
3327: my $currentstring = '';
3328: if ($target eq 'web' || $target eq 'webgrade') {
3329: $currentstring = $token->[2];
3330: }
3331: return $currentstring;
3332: }
3333:
3334: #-- <base> tag (end tag forbidden)
3335: sub start_base {
3336: my ($target,$token) = @_;
3337: my $currentstring = '';
3338: if ($target eq 'web' || $target eq 'webgrade') {
3339: $currentstring = $token->[4];
3340: }
3341: return $currentstring;
3342: }
3343:
3344: sub end_base {
3345: my ($target,$token) = @_;
3346: my $currentstring = '';
3347: if ($target eq 'web' || $target eq 'webgrade') {
3348: $currentstring = $token->[2];
3349: }
3350: return $currentstring;
3351: }
3352:
3353: #-- <bdo> tag (end tag required)
3354: sub start_bdo {
3355: my ($target,$token) = @_;
3356: my $currentstring = '';
3357: if ($target eq 'web' || $target eq 'webgrade') {
3358: $currentstring = $token->[4];
3359: }
3360: return $currentstring;
3361: }
3362:
3363: sub end_bdo {
3364: my ($target,$token) = @_;
3365: my $currentstring = '';
3366: if ($target eq 'web' || $target eq 'webgrade') {
3367: $currentstring = $token->[2];
3368: }
3369: return $currentstring;
3370: }
3371:
3372: #-- <bgsound> tag (end tag optional)
3373: sub start_bgsound {
3374: my ($target,$token) = @_;
3375: my $currentstring = '';
3376: if ($target eq 'web' || $target eq 'webgrade') {
3377: $currentstring = $token->[4];
3378: }
3379: return $currentstring;
3380: }
3381:
3382: sub end_bgsound {
3383: my ($target,$token) = @_;
3384: my $currentstring = '';
3385: if ($target eq 'web' || $target eq 'webgrade') {
3386: $currentstring = $token->[2];
3387: }
3388: return $currentstring;
3389: }
3390:
3391: #-- <blink> tag (end tag required)
3392: sub start_blink {
3393: my ($target,$token) = @_;
3394: my $currentstring = '';
3395: if ($target eq 'web' || $target eq 'webgrade') {
3396: $currentstring = $token->[4];
3397: }
3398: return $currentstring;
3399: }
3400:
3401: sub end_blink {
3402: my ($target,$token) = @_;
3403: my $currentstring = '';
3404: if ($target eq 'web' || $target eq 'webgrade') {
3405: $currentstring = $token->[2];
3406: }
3407: return $currentstring;
3408: }
3409:
3410: #-- <blockquote> tag (end tag required)
3411: sub start_blockquote {
3412: my ($target,$token) = @_;
3413: my $currentstring = &end_p(); # Close any unclosed <p>
3414: if ($target eq 'web' || $target eq 'webgrade') {
3415: $currentstring .= $token->[4];
3416: }
3417: if ($target eq 'tex') {
3418: $currentstring .= '\begin{quote}';
3419: }
3420: return $currentstring;
3421: }
3422:
3423: sub end_blockquote {
3424: my ($target,$token) = @_;
3425: my $currentstring = '';
3426: if ($target eq 'web' || $target eq 'webgrade') {
3427: $currentstring = $token->[2];
3428: }
3429: if ($target eq 'tex') {
3430: $currentstring = '\end{quote}';
3431: }
3432: return $currentstring;
3433: }
3434:
3435: #-- <button> tag (end tag required)
3436: sub start_button {
3437: my ($target,$token) = @_;
3438: my $currentstring = '';
3439: if ($target eq 'web' || $target eq 'webgrade') {
3440: $currentstring = $token->[4];
3441: }
3442: return $currentstring;
3443: }
3444:
3445: sub end_button {
3446: my ($target,$token) = @_;
3447: my $currentstring = '';
3448: if ($target eq 'web' || $target eq 'webgrade') {
3449: $currentstring = $token->[2];
3450: }
3451: return $currentstring;
3452: }
3453:
3454: #-- <caption> tag (end tag required)
3455: sub start_caption {
3456: my ($target,$token) = @_;
3457: my $currentstring = '';
3458: if ($target eq 'web' || $target eq 'webgrade') {
3459: $currentstring = $token->[4];
3460: }
3461: return $currentstring;
3462: }
3463:
3464: sub end_caption {
3465: my ($target,$token) = @_;
3466: my $currentstring = '';
3467: if ($target eq 'web' || $target eq 'webgrade') {
3468: $currentstring = $token->[2];
3469: }
3470: return $currentstring;
3471: }
3472:
3473: #-- <col> tag (end tag forbdden)
3474: sub start_col {
3475: my ($target,$token) = @_;
3476: my $currentstring = '';
3477: if ($target eq 'web' || $target eq 'webgrade') {
3478: $currentstring = $token->[4];
3479: }
3480: return $currentstring;
3481: }
3482:
3483: sub end_col {
3484: my ($target,$token) = @_;
3485: my $currentstring = '';
3486: if ($target eq 'web' || $target eq 'webgrade') {
3487: $currentstring = $token->[2];
3488: }
3489: return $currentstring;
3490: }
3491:
3492: #-- <colgroup> tag (end tag optional)
3493: sub start_colgroup {
3494: my ($target,$token) = @_;
3495: my $currentstring = '';
3496: if ($target eq 'web' || $target eq 'webgrade') {
3497: $currentstring = $token->[4];
3498: }
3499: return $currentstring;
3500: }
3501:
3502: sub end_colgroup {
3503: my ($target,$token) = @_;
3504: my $currentstring = '';
3505: if ($target eq 'web' || $target eq 'webgrade') {
3506: $currentstring = $token->[2];
3507: }
3508: return $currentstring;
3509: }
3510:
3511: #-- <del> tag (end tag required)
3512: sub start_del {
3513: my ($target,$token) = @_;
3514: my $currentstring = '';
3515: if ($target eq 'web' || $target eq 'webgrade') {
3516: $currentstring = $token->[4];
3517: }
3518: return $currentstring;
3519: }
3520:
3521: sub end_del {
3522: my ($target,$token) = @_;
3523: my $currentstring = '';
3524: if ($target eq 'web' || $target eq 'webgrade') {
3525: $currentstring = $token->[2];
3526: }
3527: return $currentstring;
3528: }
3529:
3530: #-- <fieldset> tag (end tag required)
3531: sub start_fieldset {
3532: my ($target,$token) = @_;
3533: my $currentstring = '';
3534: if ($target eq 'web' || $target eq 'webgrade') {
3535: $currentstring = $token->[4];
3536: }
3537: return $currentstring;
3538: }
3539:
3540: sub end_fieldset {
3541: my ($target,$token) = @_;
3542: my $currentstring = '';
3543: if ($target eq 'web' || $target eq 'webgrade') {
3544: $currentstring = $token->[2];
3545: }
3546: return $currentstring;
3547: }
3548:
3549: #-- <frame> tag (end tag forbidden)
3550: sub start_frame {
3551: my ($target,$token) = @_;
3552: my $currentstring = '';
3553: if ($target eq 'web' || $target eq 'webgrade') {
3554: $currentstring = $token->[4];
3555: }
3556: return $currentstring;
3557: }
3558:
3559: sub end_frame {
3560: my ($target,$token) = @_;
3561: my $currentstring = '';
3562: if ($target eq 'web' || $target eq 'webgrade') {
3563: $currentstring = $token->[2];
3564: }
3565: return $currentstring;
3566: }
3567:
3568: #-- <iframe> tag (end tag required)
3569: sub start_iframe {
3570: my ($target,$token) = @_;
3571: my $currentstring = '';
3572: if ($target eq 'web' || $target eq 'webgrade') {
3573: $currentstring = $token->[4];
3574: }
3575: return $currentstring;
3576: }
3577:
3578: sub end_iframe {
3579: my ($target,$token) = @_;
3580: my $currentstring = '';
3581: if ($target eq 'web' || $target eq 'webgrade') {
3582: $currentstring = $token->[2];
3583: }
3584: return $currentstring;
3585: }
3586:
3587: #-- <ins> tag (end tag required)
3588: sub start_ins {
3589: my ($target,$token) = @_;
3590: my $currentstring = '';
3591: if ($target eq 'web' || $target eq 'webgrade') {
3592: $currentstring = $token->[4];
3593: }
3594: return $currentstring;
3595: }
3596:
3597: sub end_ins {
3598: my ($target,$token) = @_;
3599: my $currentstring = '';
3600: if ($target eq 'web' || $target eq 'webgrade') {
3601: $currentstring = $token->[2];
3602: }
3603: return $currentstring;
3604: }
3605:
3606: #-- <isindex> tag (end tag forbidden)
3607: sub start_isindex {
3608: my ($target,$token) = @_;
3609: my $currentstring = '';
3610: if ($target eq 'web' || $target eq 'webgrade') {
3611: $currentstring = $token->[4];
3612: }
3613: return $currentstring;
3614: }
3615:
3616: sub end_isindex {
3617: my ($target,$token) = @_;
3618: my $currentstring = '';
3619: if ($target eq 'web' || $target eq 'webgrade') {
3620: $currentstring = $token->[2];
3621: }
3622: return $currentstring;
3623: }
3624:
3625: #-- <keygen> tag (end tag forbidden)
3626: sub start_keygen {
3627: my ($target,$token) = @_;
3628: my $currentstring = '';
3629: if ($target eq 'web' || $target eq 'webgrade') {
3630: $currentstring = $token->[4];
3631: }
3632: return $currentstring;
3633: }
3634:
3635: sub end_keygen {
3636: my ($target,$token) = @_;
3637: my $currentstring = '';
3638: if ($target eq 'web' || $target eq 'webgrade') {
3639: $currentstring = $token->[2];
3640: }
3641: return $currentstring;
3642: }
3643:
3644: #-- <label> tag
3645: sub start_label {
3646: my ($target,$token) = @_;
3647: my $currentstring = '';
3648: if ($target eq 'web' || $target eq 'webgrade') {
3649: $currentstring = $token->[4];
3650: }
3651: return $currentstring;
3652: }
3653:
3654: sub end_label {
3655: my ($target,$token) = @_;
3656: my $currentstring = '';
3657: if ($target eq 'web' || $target eq 'webgrade') {
3658: $currentstring = $token->[2];
3659: }
3660: return $currentstring;
3661: }
3662:
3663: #-- <layer> tag (end tag required)
3664: sub start_layer {
3665: my ($target,$token) = @_;
3666: my $currentstring = '';
3667: if ($target eq 'web' || $target eq 'webgrade') {
3668: $currentstring = $token->[4];
3669: }
3670: return $currentstring;
3671: }
3672:
3673: sub end_layer {
3674: my ($target,$token) = @_;
3675: my $currentstring = '';
3676: if ($target eq 'web' || $target eq 'webgrade') {
3677: $currentstring = $token->[2];
3678: }
3679: return $currentstring;
3680: }
3681:
3682: #-- <legend> tag (end tag required)
3683: sub start_legend {
3684: my ($target,$token) = @_;
3685: my $currentstring = '';
3686: if ($target eq 'web' || $target eq 'webgrade') {
3687: $currentstring = $token->[4];
3688: }
3689: return $currentstring;
3690: }
3691:
3692: sub end_legend {
3693: my ($target,$token) = @_;
3694: my $currentstring = '';
3695: if ($target eq 'web' || $target eq 'webgrade') {
3696: $currentstring = $token->[2];
3697: }
3698: return $currentstring;
3699: }
3700:
3701: #-- <link> tag (end tag forbidden)
3702: sub start_link {
3703: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3704: my $currentstring = '';
3705: if ($target eq 'web' || $target eq 'webgrade') {
3706: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3707: undef,1);
3708: &Apache::lonxml::extlink($href);
3709: $currentstring = $token->[4];
3710: }
3711: return $currentstring;
3712: }
3713:
3714: sub end_link {
3715: my ($target,$token) = @_;
3716: my $currentstring = '';
3717: if ($target eq 'web' || $target eq 'webgrade') {
3718: $currentstring = $token->[2];
3719: }
3720: return $currentstring;
3721: }
3722:
3723: #-- <marquee> tag (end tag optional)
3724: sub start_marquee {
3725: my ($target,$token) = @_;
3726: my $currentstring = '';
3727: if ($target eq 'web' || $target eq 'webgrade') {
3728: $currentstring = $token->[4];
3729: }
3730: return $currentstring;
3731: }
3732:
3733: sub end_marquee {
3734: my ($target,$token) = @_;
3735: my $currentstring = '';
3736: if ($target eq 'web' || $target eq 'webgrade') {
3737: $currentstring = $token->[2];
3738: }
3739: return $currentstring;
3740: }
3741:
3742: #-- <multicol> tag (end tag required)
3743: sub start_multicol {
3744: my ($target,$token) = @_;
3745: my $currentstring = &end_p(); # Close any pending <p>
3746: if ($target eq 'web' || $target eq 'webgrade') {
3747: $currentstring .= $token->[4];
3748: }
3749: return $currentstring;
3750: }
3751:
3752: sub end_multicol {
3753: my ($target,$token) = @_;
3754: my $currentstring = '';
3755: if ($target eq 'web' || $target eq 'webgrade') {
3756: $currentstring = $token->[2];
3757: }
3758: return $currentstring;
3759: }
3760:
3761: #-- <nobr> tag (end tag required)
3762: sub start_nobr {
3763: my ($target,$token) = @_;
3764: my $currentstring = '';
3765: if ($target eq 'web' || $target eq 'webgrade') {
3766: $currentstring = $token->[4];
3767: } elsif ($target eq 'tex') {
3768: $currentstring='\mbox{';
3769: }
3770: return $currentstring;
3771: }
3772:
3773: sub end_nobr {
3774: my ($target,$token) = @_;
3775: my $currentstring = '';
3776: if ($target eq 'web' || $target eq 'webgrade') {
3777: $currentstring = $token->[2];
3778: } elsif ($target eq 'tex') {
3779: $currentstring='}';
3780: }
3781: return $currentstring;
3782: }
3783:
3784: #-- <noembed> tag (end tag required)
3785: sub start_noembed {
3786: my ($target,$token) = @_;
3787: my $currentstring = '';
3788: if ($target eq 'web' || $target eq 'webgrade') {
3789: $currentstring = $token->[4];
3790: }
3791: return $currentstring;
3792: }
3793:
3794: sub end_noembed {
3795: my ($target,$token) = @_;
3796: my $currentstring = '';
3797: if ($target eq 'web' || $target eq 'webgrade') {
3798: $currentstring = $token->[2];
3799: }
3800: return $currentstring;
3801: }
3802:
3803: #-- <noframes> tag (end tag required)
3804: sub start_noframes {
3805: my ($target,$token) = @_;
3806: my $currentstring = '';
3807: if ($target eq 'web' || $target eq 'webgrade') {
3808: $currentstring = $token->[4];
3809: }
3810: return $currentstring;
3811: }
3812:
3813: sub end_noframes {
3814: my ($target,$token) = @_;
3815: my $currentstring = '';
3816: if ($target eq 'web' || $target eq 'webgrade') {
3817: $currentstring = $token->[2];
3818: }
3819: return $currentstring;
3820: }
3821:
3822: #-- <nolayer> tag (end tag required)
3823: sub start_nolayer {
3824: my ($target,$token) = @_;
3825: my $currentstring = '';
3826: if ($target eq 'web' || $target eq 'webgrade') {
3827: $currentstring = $token->[4];
3828: }
3829: return $currentstring;
3830: }
3831:
3832: sub end_nolayer {
3833: my ($target,$token) = @_;
3834: my $currentstring = '';
3835: if ($target eq 'web' || $target eq 'webgrade') {
3836: $currentstring = $token->[2];
3837: }
3838: return $currentstring;
3839: }
3840:
3841: #-- <noscript> tag (end tag required)
3842: sub start_noscript {
3843: my ($target,$token) = @_;
3844: my $currentstring = '';
3845: if ($target eq 'web' || $target eq 'webgrade') {
3846: $currentstring = $token->[4];
3847: }
3848: return $currentstring;
3849: }
3850:
3851: sub end_noscript {
3852: my ($target,$token) = @_;
3853: my $currentstring = '';
3854: if ($target eq 'web' || $target eq 'webgrade') {
3855: $currentstring = $token->[2];
3856: }
3857: return $currentstring;
3858: }
3859:
3860: #-- <object> tag (end tag required)
3861: sub start_object {
3862: my ($target,$token) = @_;
3863: my $currentstring = '';
3864: if ($target eq 'web' || $target eq 'webgrade') {
3865: $currentstring = $token->[4];
3866: }
3867: return $currentstring;
3868: }
3869:
3870: sub end_object {
3871: my ($target,$token) = @_;
3872: my $currentstring = '';
3873: if ($target eq 'web' || $target eq 'webgrade') {
3874: $currentstring = $token->[2];
3875: }
3876: return $currentstring;
3877: }
3878:
3879: #-- <optgroup> tag (end tag required)
3880: sub start_optgroup {
3881: my ($target,$token) = @_;
3882: my $currentstring = '';
3883: if ($target eq 'web' || $target eq 'webgrade') {
3884: $currentstring = $token->[4];
3885: }
3886: return $currentstring;
3887: }
3888:
3889: sub end_optgroup {
3890: my ($target,$token) = @_;
3891: my $currentstring = '';
3892: if ($target eq 'web' || $target eq 'webgrade') {
3893: $currentstring = $token->[2];
3894: }
3895: return $currentstring;
3896: }
3897:
3898: #-- <samp> tag (end tag required)
3899: sub start_samp {
3900: my ($target,$token) = @_;
3901: my $currentstring = '';
3902: if ($target eq 'web' || $target eq 'webgrade') {
3903: $currentstring = $token->[4];
3904: } elsif ($target eq 'tex') {
3905: $currentstring='\texttt{';
3906: }
3907: return $currentstring;
3908: }
3909:
3910: sub end_samp {
3911: my ($target,$token) = @_;
3912: my $currentstring = '';
3913: if ($target eq 'web' || $target eq 'webgrade') {
3914: $currentstring = $token->[2];
3915: } elsif ($target eq 'tex') {
3916: $currentstring='}';
3917: }
3918: return $currentstring;
3919: }
3920:
3921: #-- <server> tag
3922: sub start_server {
3923: my ($target,$token) = @_;
3924: my $currentstring = '';
3925: if ($target eq 'web' || $target eq 'webgrade') {
3926: $currentstring = $token->[4];
3927: }
3928: return $currentstring;
3929: }
3930:
3931: sub end_server {
3932: my ($target,$token) = @_;
3933: my $currentstring = '';
3934: if ($target eq 'web' || $target eq 'webgrade') {
3935: $currentstring = $token->[2];
3936: }
3937: return $currentstring;
3938: }
3939:
3940: #-- <spacer> tag (end tag forbidden)
3941: sub start_spacer {
3942: my ($target,$token) = @_;
3943: my $currentstring = &end_p(); # Close off any open <p> tag.
3944: if ($target eq 'web' || $target eq 'webgrade') {
3945: $currentstring .= $token->[4];
3946: }
3947: return $currentstring;
3948: }
3949:
3950: sub end_spacer {
3951: my ($target,$token) = @_;
3952: my $currentstring = '';
3953: if ($target eq 'web' || $target eq 'webgrade') {
3954: $currentstring = $token->[2];
3955: }
3956: return $currentstring;
3957: }
3958:
3959: #-- <span> tag (end tag required)
3960: sub start_span {
3961: my ($target,$token) = @_;
3962: my $currentstring = '';
3963: if ($target eq 'web' || $target eq 'webgrade') {
3964: $currentstring = $token->[4];
3965: }
3966: return $currentstring;
3967: }
3968:
3969: sub end_span {
3970: my ($target,$token) = @_;
3971: my $currentstring = '';
3972: if ($target eq 'web' || $target eq 'webgrade') {
3973: $currentstring = $token->[2];
3974: }
3975: return $currentstring;
3976: }
3977:
3978: #-- <tbody> tag (end tag optional)
3979: sub start_tbody {
3980: my ($target,$token) = @_;
3981: my $currentstring = '';
3982: if ($target eq 'web' || $target eq 'webgrade') {
3983: $currentstring = $token->[4];
3984: }
3985: return $currentstring;
3986: }
3987:
3988: sub end_tbody {
3989: my ($target,$token) = @_;
3990: my $currentstring = '';
3991: if ($target eq 'web' || $target eq 'webgrade') {
3992: $currentstring = $token->[2];
3993: }
3994: return $currentstring;
3995: }
3996:
3997: #-- <tfoot> tag (end tag optional)
3998: sub start_tfoot {
3999: my ($target,$token) = @_;
4000: my $currentstring = '';
4001: if ($target eq 'web' || $target eq 'webgrade') {
4002: $currentstring = $token->[4];
4003: }
4004: return $currentstring;
4005: }
4006:
4007: sub end_tfoot {
4008: my ($target,$token) = @_;
4009: my $currentstring = '';
4010: if ($target eq 'web' || $target eq 'webgrade') {
4011: $currentstring = $token->[2];
4012: }
4013: return $currentstring;
4014: }
4015:
4016: #-- <thead> tag (end tag optional)
4017: sub start_thead {
4018: my ($target,$token) = @_;
4019: my $currentstring = '';
4020: if ($target eq 'web' || $target eq 'webgrade') {
4021: $currentstring = $token->[4];
4022: }
4023: return $currentstring;
4024: }
4025:
4026: sub end_thead {
4027: my ($target,$token) = @_;
4028: my $currentstring = '';
4029: if ($target eq 'web' || $target eq 'webgrade') {
4030: $currentstring = $token->[2];
4031: }
4032: return $currentstring;
4033: }
4034:
4035: #-- <var> tag
4036: sub start_var {
4037: my ($target,$token) = @_;
4038: my $currentstring = '';
4039: if ($target eq 'web' || $target eq 'webgrade') {
4040: $currentstring = $token->[4];
4041: } elsif ($target eq 'tex') {
4042: $currentstring = '\textit{';
4043: }
4044: return $currentstring;
4045: }
4046:
4047: sub end_var {
4048: my ($target,$token) = @_;
4049: my $currentstring = '';
4050: if ($target eq 'web' || $target eq 'webgrade') {
4051: $currentstring = $token->[2];
4052: } elsif ($target eq 'tex') {
4053: $currentstring = '}';
4054: }
4055: return $currentstring;
4056: }
4057:
4058: #-- <wbr> tag (end tag forbidden)
4059: sub start_wbr {
4060: my ($target,$token) = @_;
4061: my $currentstring = '';
4062: if ($target eq 'web' || $target eq 'webgrade') {
4063: $currentstring = $token->[4];
4064: }
4065: return $currentstring;
4066: }
4067:
4068: sub end_wbr {
4069: my ($target,$token) = @_;
4070: my $currentstring = '';
4071: if ($target eq 'web' || $target eq 'webgrade') {
4072: $currentstring = $token->[2];
4073: }
4074: return $currentstring;
4075: }
4076:
4077: #-- <hideweboutput> tag
4078: sub start_hideweboutput {
4079: my ($target,$token) = @_;
4080: if ($target eq 'web' || $target eq 'webgrade') {
4081: &Apache::lonxml::startredirection();
4082: }
4083: return '';
4084: }
4085:
4086: sub end_hideweboutput {
4087: my ($target,$token) = @_;
4088: my $currentstring = '';
4089: if ($target eq 'web' || $target eq 'webgrade') {
4090: $currentstring = &Apache::lonxml::endredirection();
4091: }
4092: return '';
4093: }
4094:
4095:
4096: sub image_replication {
4097: my $src = shift;
4098: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4099: #replicates eps or ps
4100: my $epssrc = my $pssrc = $src;
4101: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4102: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4103: if (not -e $epssrc && not -e $pssrc) {
4104: my $result=&Apache::lonnet::repcopy($epssrc);
4105: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4106: }
4107: return '';
4108: }
4109: #
4110: # Get correct sizing parameter for an image given
4111: # it's initial ht. and wid. This allows sizing of
4112: # images that are generated on-the-fly (e.g. gnuplot)
4113: # as well as serving as a utility for image_size.
4114: #
4115: # Parameter:
4116: # height_param
4117: # width_param - Initial picture dimensions.
4118: # scaling - A scale factor.
4119: # parstack, - the current stack of tag attributes
4120: # from the xml parser
4121: # safeeval, - pointer to the safespace
4122: # depth, - from what level in the stack to look for attributes
4123: # (assumes -1 if unspecified)
4124: # cis - look for attrubutes case insensitively
4125: # (assumes false)
4126: #
4127: # Returns:
4128: # height, width - new dimensions.
4129: #
4130: sub resize_image {
4131: my ($height_param, $width_param, $scaling,
4132: $parstack, $safeeval, $depth, $cis) = @_;
4133:
4134: # First apply the scaling...
4135:
4136: $height_param = $height_param * $scaling;
4137: $width_param = $width_param * $scaling;
4138:
4139: #do we have any specified LaTeX size of the picture?
4140: my $toget='TeXwidth';
4141: if ($cis) {
4142: $toget=lc($toget);
4143: }
4144: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4145: $safeeval,$depth,$cis);
4146: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4147: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4148: $safeeval,$depth,$cis);
4149: #do we have any specified web size of the picture?
4150: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4151: $depth,1);
4152: if ($TeXwidth) {
4153: my $old_width_param=$width_param;
4154: if ($TeXwidth=~/(\d+)\s*\%/) {
4155: $width_param = $1*$env{'form.textwidth'}/100;
4156: } else {
4157: $width_param = $TeXwidth;
4158: }
4159: if ($TeXheight) {
4160: $height_param = $TeXheight;
4161: } elsif ($old_width_param) {
4162: $height_param=$TeXwidth/$old_width_param*$height_param;
4163: }
4164: } elsif ($TeXheight) {
4165: $height_param = $TeXheight;
4166: if ($height_param) {
4167: $width_param = $TeXheight/$height_param*$width_param;
4168: }
4169: } elsif ($width) {
4170: my $old_width_param=$width_param;
4171: $width_param = $width*$scaling;
4172: if ($old_width_param) {
4173: $height_param=$width_param/$old_width_param*$height_param;
4174: }
4175: }
4176: if ($width_param > $env{'form.textwidth'}) {
4177: my $old_width_param=$width_param;
4178: $width_param =0.95*$env{'form.textwidth'};
4179: if ($old_width_param) {
4180: $height_param=$width_param/$old_width_param*$height_param;
4181: }
4182: }
4183:
4184: return ($height_param, $width_param);
4185: }
4186:
4187: sub image_size {
4188: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4189:
4190: #size of image from gif/jpg/jpeg/png
4191: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4192: if (-e $ressrc) {
4193: $src = $ressrc;
4194: }
4195: my $image = Image::Magick->new;
4196: my $current_figure = $image->Read($src);
4197: my $width_param = $image->Get('width');
4198: my $height_param = $image->Get('height');
4199: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4200: undef($image);
4201:
4202: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4203: $scaling, $parstack, $safeeval,
4204: $depth, $cis);
4205:
4206: return ($height_param, $width_param);
4207: }
4208:
4209: sub image_width {
4210: my ($height, $width) = &image_size(@_);
4211: return $width;
4212: }
4213: # Not yet 100% sure this is correct in all circumstances..
4214: # due to my uncertainty about mods to image_size.
4215: #
4216: sub image_height {
4217: my ($height, $width) = &image_size(@_);
4218: return $height;
4219: }
4220:
4221: sub get_eps_image {
4222: my ($src)=@_;
4223: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4224:
4225: # In order to prevent the substitution of the alt text, we need to
4226: # be sure the orig_src file is on system now so:
4227:
4228: if (! -e $orig_src) {
4229: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4230: }
4231: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4232: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4233: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4234: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4235: &Apache::lonxml::debug("Filelocation gives: $src");
4236: if (! -e $src) {
4237: &Apache::lonxml::debug("$src does not exist");
4238: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4239: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4240: #if replication failed try to find ps file
4241: $src=~s/\.eps$/\.ps/;
4242: &Apache::lonxml::debug("Now looking for $src");
4243: #if no ps file try to replicate it.
4244: my $didrepcopy = &Apache::lonnet::repcopy($src);
4245: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4246: if ( (not -e $src) ||
4247: ($didrepcopy ne 'ok')) {
4248: &Apache::lonxml::debug("Failed to find or replicate $src");
4249:
4250: #if replication failed try to produce eps file dynamically
4251: $src=~s/\.ps$/\.eps/;
4252: my $temp_file;
4253: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4254: my $newsrc=$orig_src;
4255: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4256: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4257: print FILE "$newsrc\n";
4258: close FILE;
4259: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4260: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4261: if ($sext ne "") { # Put the ext. back in to uniquify.
4262: $src =~ s/\.eps$/$sext.eps/;
4263: }
4264: }
4265: }
4266: }
4267: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4268: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4269: return ($path.'/',$file);
4270: }
4271:
4272: sub eps_generation {
4273: my ($src,$file,$width_param) = @_;
4274: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4275: my $temp_file = Apache::File->new('>>'.$filename);
4276: print $temp_file "$src\n";
4277: my $newsrc = $src;
4278: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4279: $newsrc=~s/\/home\/httpd\/html\/res//;
4280: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4281: $newsrc=~s/\/\.\//\//;
4282: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4283: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4284: $newsrc=~s/\/home\/httpd\/lonUsers//;
4285: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4286: }
4287: if ($newsrc=~/\/userfiles\//) {
4288: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4289: } else {
4290: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4291: }
4292: }
4293:
4294: sub file_path {
4295: my $src=shift;
4296: my ($file,$path);
4297: if ($src =~ m!(.*)/([^/]*)$!) {
4298: $file = $2;
4299: $path = $1.'/';
4300: }
4301: return $file,$path;
4302: }
4303: # Converts a measurement in to mm from any of
4304: # the other valid LaTeX units of measure.
4305: # If the units of measure are missing from the
4306: # parameter, it is assumed to be in and returned
4307: # with mm units of measure
4308: sub recalc {
4309: my $argument = shift;
4310: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4311: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4312: my $value=$1;
4313: my $units=$2;
4314: if ($units eq 'cm') {
4315: $value*=10;
4316: } elsif ($units eq 'in') {
4317: $value*=25.4;
4318: } elsif ($units eq 'pc') {
4319: $value*=(25.4*12/72.27);
4320: } elsif ($units eq 'pt') {
4321: $value*=(25.4/72.27);
4322: }
4323: return $value.' mm';
4324: }
4325:
4326: sub LATEX_length {
4327: my $garbage=shift;
4328: $garbage=~s/^\s+$//;
4329: $garbage=~s/^\s+(\S.*)/$1/;#space before
4330: $garbage=~s/(.*\S)\s+$/$1/;#space after
4331: $garbage=~s/(\s)+/$1/;#only one space
4332: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4333: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4334: $garbage=~s/([^\\])\$/$1/g;#$
4335: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4336: $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;
4337: $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;
4338: $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;
4339: $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;
4340: $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;
4341: $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;
4342: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4343: #remove some other LaTeX command
4344: $garbage=~s|\\(\w+)\\|\\|g;
4345: $garbage=~s|\\(\w+)(\s*)|$2|g;
4346: $garbage=~s|\+|11|g;
4347: my $value=length($garbage);
4348: return $value;
4349: }
4350:
4351:
4352: # is_inside_of $tagstack $tag
4353: # This sub returns true if the current state of Xml processing
4354: # is inside of the tag.
4355: # Parameters:
4356: # tagstack - The tagstack from the parser.
4357: # tag - The tag (without the <>'s.).
4358: # Sample usage:
4359: # if (is_inside_of($tagstack "table")) {
4360: # # I'm in a table....
4361: # }
4362: sub is_inside_of {
4363: my ($tagstack, $tag) = @_;
4364: my @stack = @$tagstack;
4365: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4366: if ($stack[$i] eq $tag) {
4367: return 1;
4368: }
4369: }
4370: return 0;
4371: }
4372:
4373:
4374: 1;
4375: __END__
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