1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.348 2006/12/19 22:30:52 albertel Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: use LONCAPA();
52: # use Data::Dumper;
53:
54: BEGIN {
55:
56: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
57:
58: }
59:
60: #
61: # Dumps all elements of the table structure.
62: # Need this 'cause evidently when given an array, Data::Dumper only seems
63: # to dump element 0.
64: #
65: #sub debug_dump_table {
66: # my $lastrow = $#Apache::londefdef::table;
67: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
68: # my $row;
69: # for ($row =0; $row <= $lastrow; $row++ ) {
70: # my $text = Dumper($Apache::londefdef::table[$row]);
71: # &Apache::lonnet::logthis("table [ $row ]".$text);
72: # }
73: #}
74: sub initialize_londefdef {
75: $Apache::londefdef::TD_redirection=0;
76: @Apache::londefdef::table = ();
77: $Apache::londefdef::select=0;
78: undef(@Apache::londefdef::description);
79: @Apache::londefdef::DD=(0);
80: @Apache::londefdef::DT=(0);
81: @Apache::londefdef::seenDT=(0);
82: $Apache::londefdef::list_index=0;
83: undef($Apache::londefdef::head);
84: undef($Apache::londefdef::title);
85: }
86:
87: #======================= TAG SUBROUTINES =====================
88: #-- <output>
89: sub start_output {
90: my ($target) = @_;
91: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
92: return '';
93: }
94: sub end_output {
95: my ($target) = @_;
96: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
97: return '';
98: }
99: #-- <m> tag
100: sub start_m {
101: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
102: my $currentstring = '';
103: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
104: if ($target eq 'web' || $target eq 'analyze') {
105: &Apache::lonxml::debug("M is starting with:$inside:");
106: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
107: if ($eval eq 'on') {
108: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
109: #&Apache::lonxml::debug("M is evaulated to:$inside:");
110: }
111: my $tex = $inside;
112: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
113: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
114: if ($Apache::lontexconvert::errorstring) {
115: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
116: $tex = &HTML::Entities::encode($tex,'<>&"');
117: my ($linenumber) =
118: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
119: if (defined($linenumber)) {
120: my @tex=split("\n",$tex);
121: $tex[$linenumber]='<b><font color="red">'.
122: $tex[$linenumber].'</font></b>';
123: $tex=join("\n",@tex);
124: }
125: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
126: $Apache::lontexconvert::errorstring='';
127: }
128: #&Apache::lonxml::debug("M is ends with:$currentstring:");
129: $Apache::lonxml::post_evaluate=0;
130: } elsif ($target eq 'tex') {
131: $currentstring = $inside;
132: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
133: if ($eval eq 'on') {
134: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
135: }
136: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
137: # detect simple math mode entry exits, and convert them
138: # to use \ensuremath
139: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
140: $currentstring=~s/^(\s*)\$/$1/;
141: $currentstring=~s/\$(\s*)$/$1/;
142: $currentstring='\ensuremath{'.$currentstring.'}';
143: }
144: $Apache::lonxml::post_evaluate=0;
145: }
146: return $currentstring;
147: }
148:
149: sub end_m {
150: my ($target,$token) = @_;
151: my $currentstring = '';
152: if ($target eq 'tex') {
153: $currentstring = "";
154: }
155: return $currentstring;
156: }
157:
158: sub start_tthoption {
159: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
160: my $result;
161: if ($target eq 'web' || $target eq 'webgrade') {
162: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
163: $style);
164: $inside=~s/^\s*//;
165: if ($env{'browser.mathml'}) {
166: &tth::ttmoptions($inside);
167: } else {
168: &tth::tthoptions($inside);
169: }
170: }
171: return $result;
172: }
173:
174: sub end_tthoption {
175: my ($target,$token) = @_;
176: my $result;
177: return $result;
178: }
179:
180: #-- <html> tag (end tag optional)
181: sub start_html {
182: my ($target,$token) = @_;
183: my $currentstring = '';
184: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
185: # start_body() takes care of emitting the <html>
186: } elsif ($target eq 'tex') {
187: $currentstring .=
188: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
189: if (($env{'form.latex_type'}=~'batchmode') ||
190: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
191: $currentstring .= '\newcommand{\keephidden}[1]{}'.
192: '\renewcommand{\deg}{$^{\circ}$}'.
193: '\usepackage{multirow}'.
194: '\usepackage{longtable}'.
195: '\usepackage{textcomp}'.
196: '\usepackage{makeidx}'.
197: '\usepackage[dvips]{graphicx}'.
198: '\usepackage{wrapfig}'.
199: '\usepackage{picins}'.
200: '\usepackage{epsfig}'.
201: '\usepackage{calc}'.
202: '\usepackage{amsmath}'.
203: '\usepackage{amssymb}'.
204: '\usepackage{amsfonts}'.
205: '\usepackage{amsthm}'.
206: '\usepackage{amscd}'.
207: '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'.
208: '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}';
209: }
210: return $currentstring;
211: }
212:
213: sub end_html {
214: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
215: my $currentstring = '';
216: if ($target eq 'web' || $target eq 'webgrade') {
217: # end_body takes care of the </html>
218: }
219: return $currentstring;
220: }
221:
222: #-- <head> tag (end tag optional)
223: sub start_head {
224: my ($target,$token) = @_;
225: my $currentstring = '';
226: if ($target eq 'web' || $target eq 'webgrade') {
227: &Apache::lonxml::startredirection();
228: }
229: return $currentstring;
230: }
231:
232: sub end_head {
233: my ($target,$token) = @_;
234: my $currentstring = '';
235: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
236: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
237: # in case there is a </head> but no <head>
238: if ($Apache::lonxml::redirection) {
239: $Apache::londefdef::head = &Apache::lonxml::endredirection();
240: }
241: }
242: return $currentstring;
243: }
244:
245: #-- <map> tag (end tag required)
246: sub start_map {
247: my ($target,$token) = @_;
248: my $currentstring = '';
249: if ($target eq 'web' || $target eq 'webgrade') {
250: $currentstring = $token->[4];
251: }
252: return $currentstring;
253: }
254:
255: sub end_map {
256: my ($target,$token) = @_;
257: my $currentstring = '';
258: if ($target eq 'web' || $target eq 'webgrade') {
259: $currentstring = $token->[2];
260: }
261: return $currentstring;
262: }
263:
264: #-- <select> tag (end tag required)
265: sub start_select {
266: my ($target,$token) = @_;
267: my $currentstring = '';
268: if ($target eq 'web' || $target eq 'webgrade') {
269: $currentstring = $token->[4];
270: } elsif ($target eq 'tex') {
271: $Apache::londefdef::select=0;
272: }
273: return $currentstring;
274: }
275:
276: sub end_select {
277: my ($target,$token) = @_;
278: my $currentstring = '';
279: if ($target eq 'web' || $target eq 'webgrade') {
280: $currentstring = $token->[2];
281: }
282: return $currentstring;
283: }
284:
285: #-- <option> tag (end tag optional)
286: sub start_option {
287: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
288: my $currentstring = '';
289: if ($target eq 'web' || $target eq 'webgrade') {
290: $currentstring = $token->[4];
291: } elsif ($target eq 'tex') {
292: $Apache::londefdef::select++;
293: if ($Apache::londefdef::select == 1) {
294: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
295: } else {
296: $currentstring='\keephidden{';
297: }
298: }
299: return $currentstring;
300: }
301:
302: sub end_option {
303: my ($target,$token) = @_;
304: my $currentstring = '';
305: if ($target eq 'web' || $target eq 'webgrade') {
306: $currentstring = $token->[2];
307: } elsif ($target eq 'tex') {
308: $currentstring='}';
309: }
310: return $currentstring;
311: }
312:
313: #-- <input> tag (end tag forbidden)
314: sub start_input {
315: my ($target,$token) = @_;
316: my $currentstring = '';
317: if ($target eq 'web' || $target eq 'webgrade') {
318: $currentstring = $token->[4];
319: }
320: return $currentstring;
321: }
322:
323: sub end_input {
324: my ($target,$token) = @_;
325: my $currentstring = '';
326: if ($target eq 'web' || $target eq 'webgrade') {
327: $currentstring = $token->[2];
328: }
329: return $currentstring;
330: }
331:
332: #-- <textarea> tag (end tag required)
333: sub start_textarea {
334: my ($target,$token) = @_;
335: my $currentstring = '';
336: if ($target eq 'web' || $target eq 'webgrade') {
337: $currentstring = $token->[4];
338: }
339: return $currentstring;
340: }
341:
342: sub end_textarea {
343: my ($target,$token) = @_;
344: my $currentstring = '';
345: if ($target eq 'web' || $target eq 'webgrade') {
346: $currentstring = $token->[2];
347: }
348: return $currentstring;
349: }
350:
351: #-- <form> tag (end tag required)
352: sub start_form {
353: my ($target,$token) = @_;
354: my $currentstring = '';
355: if ($target eq 'web' || $target eq 'webgrade') {
356: $currentstring = $token->[4];
357: }
358: return $currentstring;
359: }
360:
361: sub end_form {
362: my ($target,$token) = @_;
363: my $currentstring = '';
364: if ($target eq 'web' || $target eq 'webgrade') {
365: $currentstring = $token->[2];
366: }
367: return $currentstring;
368: }
369:
370: #-- <title> tag (end tag required)
371: sub start_title {
372: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
373: my $currentstring = '';
374: if ($target eq 'web' || $target eq 'webgrade') {
375: $Apache::londefdef::title =
376: &Apache::lonxml::get_all_text('/title',$parser,$style);
377: } elsif ($target eq 'tex') {
378: $currentstring .= '\keephidden{Title of the document: '
379: }
380: if ($target eq 'meta') {
381: $currentstring='<title>';
382: &start_output($target);
383: }
384: return $currentstring;
385: }
386:
387: sub end_title {
388: my ($target,$token) = @_;
389: my $currentstring = '';
390: if ($target eq 'web' || $target eq 'webgrade') {
391: # start_title takes care of swallowing the title
392: } elsif ($target eq 'tex') {
393: $currentstring .= '}';
394: }
395: if ($target eq 'meta') {
396: &end_output($target);
397: $currentstring='</title>';
398: }
399: return $currentstring;
400: }
401:
402: #-- <meta> tag (end tag forbidden)
403: sub start_meta {
404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
405: my $currentstring = '';
406: if ($target eq 'web' || $target eq 'webgrade') {
407: my $args='';
408: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
409: if ($args eq '') {
410: &Apache::lonxml::get_all_text("/meta",$parser,$style);
411: } else {
412: $currentstring = $token->[4];
413: }
414: } elsif ($target eq 'meta') {
415: unless (&Apache::lonxml::get_param
416: ('http-equiv',$parstack,$safeeval,undef,1)) {
417: my $name=$token->[2]->{'name'};
418: $name=~tr/A-Z/a-z/;
419: $name=~s/\s/\_/gs;
420: $name=~s/\W//gs;
421: if ($name) {
422: $currentstring='<'.$name;
423: my $display=&Apache::lonxml::get_param
424: ('display',$parstack,$safeeval,undef,1);
425: if ($display) {
426: $display=~s/\"/\'/g;
427: $currentstring.=' display="'.$display.'"';
428: }
429: $currentstring.='>'.
430: &Apache::lonxml::get_param
431: ('content',$parstack,$safeeval,undef,1).
432: '</'.$name.'>';
433: }
434: my $display=&Apache::lonxml::get_param
435: ('display',$parstack,$safeeval,undef,1);
436: if ($display) {
437: $display=&HTML::Entities::encode($display,'<>&"');
438: $currentstring.='<'.$name.'.display>'.$display.
439: '</'.$name.'.display>';
440: }
441: }
442: } elsif ($target eq 'tex') {
443: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
444: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
445: if ((not defined $content) && (not defined $name)) {
446: &Apache::lonxml::startredirection();
447: }
448: }
449: return $currentstring;
450: }
451:
452: sub end_meta {
453: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
454: my $currentstring = '';
455: if ($target eq 'web' || $target eq 'webgrade') {
456: my $args='';
457: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
458: if ($args ne '') {
459: $currentstring = $token->[4];
460: }
461: } elsif ($target eq 'tex') {
462: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
463: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
464: if ((not defined $content) && (not defined $name)) {
465: &Apache::lonxml::endredirection();
466: }
467: }
468: return $currentstring;
469: }
470:
471: # accessrule
472: sub start_accessrule {
473: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
474: my $currentstring = '';
475: my $eff=&Apache::lonxml::get_param
476: ('effect',$parstack,$safeeval,undef,1);
477: my $realm=&Apache::lonxml::get_param
478: ('realm',$parstack,$safeeval,undef,1);
479: my $role=&Apache::lonxml::get_param
480: ('role',$parstack,$safeeval,undef,1);
481: $realm=~s/\s+//g;
482: $realm=~s/\//\_/g;
483: $realm=~s/^\_//;
484: $realm=~s/\W/\;/g;
485: $role=~s/\s+//g;
486: $role=~s/\//\_/g;
487: $role=~s/\W/\;/g;
488: if ($target eq 'web') {
489: my $args='';
490: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
491: if ($args eq '') {
492: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
493: } else {
494: $currentstring = $token->[4];
495: }
496: }
497: if ($target eq 'meta') {
498: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
499: }
500: return $currentstring;
501: }
502:
503: sub end_accessrule {
504: my ($target,$token,$tagstack,$parstack,$parser) = @_;
505: my $currentstring = '';
506: if ($target eq 'web') {
507: my $args='';
508: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
509: if ($args ne '') {
510: $currentstring = $token->[4];
511: }
512: }
513: return $currentstring;
514: }
515:
516: #-- <body> tag (end tag required)
517: sub start_body {
518: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
519: my $currentstring = '';
520:
521: if ($target eq 'web' || $target eq 'webgrade') {
522: if ($Apache::lonhomework::parsing_a_problem) {
523: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
524: return '';
525: }
526:
527: if (&is_inside_of($tagstack, "head")) {
528: &end_head(@_);
529: }
530: $currentstring =
531: &Apache::loncommon::start_page($Apache::londefdef::title,
532: $Apache::londefdef::head,
533: {'add_entries' => $token->[2],
534: 'no_title' => 1,
535: 'force_register' => 1});
536:
537: if ($env{'request.state'} ne 'published') {
538: $currentstring.=&Apache::lonmenu::constspaceform();
539: $currentstring.=(<<EDITBUTTON);
540: <form method="post">
541: <input type="submit" name="editmode" accesskey="e" value="Edit" />
542: </form>
543: <br />
544: EDITBUTTON
545: }
546: $currentstring.=&Apache::lonxml::message_location();
547: } elsif ($target eq 'tex') {
548: $currentstring = '\begin{document}';
549: }
550: return $currentstring;
551: }
552:
553: sub end_body {
554: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
555: my $currentstring = &end_p(); # Close off unclosed <p>
556: if ($target eq 'web' || $target eq 'webgrade') {
557: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
558: } elsif ($target eq 'tex') {
559: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
560: }
561: return $currentstring;
562: }
563:
564: # \begin{center} causes a new paragprah spacing that looks odd inside
565: # of a table cell. Same at the end of a \center but with a slightly
566: # larger space .. hence center_correction and center_end_correction.
567: #
568: sub center_correction { return '\vspace*{-6 mm}'; }
569: sub center_end_correction { return '\vspace*{-7 mm}'; }
570:
571: #-- <center> tag (end tag required)
572: sub start_center {
573: my ($target,$token,$tagstack) = @_;
574: my $currentstring = &end_p(); # Close off any prior para.
575: if ($target eq 'web' || $target eq 'webgrade') {
576: $currentstring .= $token->[4];
577: } elsif ($target eq 'tex') {
578: if (&is_inside_of($tagstack, "table")) {
579: $currentstring .= ¢er_correction();
580: }
581: $currentstring .= '\begin{center}';
582: }
583: return $currentstring;
584: }
585:
586: sub end_center {
587: my ($target,$token,$tagstack) = @_;
588: my $currentstring = '';
589: if ($target eq 'web' || $target eq 'webgrade') {
590: $currentstring = $token->[2];
591: } elsif ($target eq 'tex') {
592: $currentstring = '\end{center}';
593: if (&is_inside_of($tagstack, "table")) {
594: $currentstring .= ¢er_end_correction();
595: }
596: }
597: return $currentstring;
598: }
599:
600: #-- <b> tag (end tag required)
601: # NOTE: In TeX mode disables internal <p>
602: sub start_b {
603: my ($target,$token) = @_;
604: my $currentstring = '';
605: if ($target eq 'web' || $target eq 'webgrade') {
606: $currentstring = $token->[4];
607: } elsif ($target eq 'tex') {
608: &disable_para();
609: $currentstring .= '\textbf{';
610: }
611: return $currentstring;
612: }
613:
614: sub end_b {
615: my ($target,$token) = @_;
616: my $currentstring = '';
617: if ($target eq 'web' || $target eq 'webgrade') {
618: $currentstring = $token->[2];
619: } elsif ($target eq 'tex') {
620: &enable_para();
621: $currentstring = '}';
622: }
623: return $currentstring;
624: }
625:
626: #-- <strong> tag (end tag required)
627: # NOTE: in TeX mode disables internal <p>
628: sub start_strong {
629: my ($target,$token) = @_;
630: my $currentstring = '';
631: if ($target eq 'web' || $target eq 'webgrade') {
632: $currentstring = $token->[4];
633: } elsif ($target eq 'tex') {
634: &disable_para();
635: $currentstring = '\textbf{';
636: }
637: return $currentstring;
638: }
639:
640: sub end_strong {
641: my ($target,$token) = @_;
642: my $currentstring = '';
643: if ($target eq 'web' || $target eq 'webgrade') {
644: $currentstring = $token->[2];
645: } elsif ($target eq 'tex') {
646: &enable_para();
647: $currentstring = '}';
648: }
649: return $currentstring;
650: }
651:
652: #-- <h1> tag (end tag required)
653: sub start_h1 {
654: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
655: my $currentstring = &end_p(); # Close off any prior para.
656: if ($target eq 'web' || $target eq 'webgrade') {
657: $currentstring .= $token->[4];
658: } elsif ($target eq 'tex') {
659: my $pre;
660: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
661: if ($align eq 'center') {
662: $pre='\begin{center}';
663: } elsif ($align eq 'left') {
664: $pre='\rlap{';
665: } elsif ($align eq 'right') {
666: $pre=' \hfill \llap{';
667: }
668: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
669: if (not defined $TeXsize) {$TeXsize="large";}
670: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
671: } elsif ($target eq 'meta') {
672: $currentstring.='<subject>';
673: &start_output($target);
674: }
675: return $currentstring;
676: }
677:
678: sub end_h1 {
679: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
680: my $currentstring = '';
681: if ($target eq 'web' || $target eq 'webgrade') {
682: $currentstring .= $token->[2];
683: } elsif ($target eq 'tex') {
684: my $post='\vskip 0 mm ';
685: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
686: if ($align eq 'center') {
687: $post='\end{center}';
688: } elsif ($align eq 'left') {
689: $post='} \hfill'.'\vskip 0 mm ';
690: } elsif ($align eq 'right') {
691: $post='}'.'\vskip 0 mm ';
692: }
693: $currentstring .= '}}'.$post;
694: } elsif ($target eq 'meta') {
695: &end_output($target);
696: $currentstring='</subject>';
697: }
698: return $currentstring;
699: }
700:
701: #-- <h2> tag
702: sub start_h2 {
703: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
704: my $currentstring = &end_p(); # Close off any prior para.
705: if ($target eq 'web' || $target eq 'webgrade') {
706: $currentstring .= $token->[4];
707: } elsif ($target eq 'tex') {
708: my $pre;
709: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
710: if ($align eq 'center') {
711: $pre='\begin{center}';
712: } elsif ($align eq 'left') {
713: $pre='\rlap{';
714: } elsif ($align eq 'right') {
715: $pre=' \hfill \llap{';
716: }
717: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
718: if (not defined $TeXsize) {$TeXsize="large";}
719: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
720: }
721: return $currentstring;
722: }
723:
724: sub end_h2 {
725: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
726: my $currentstring = '';
727: if ($target eq 'web' || $target eq 'webgrade') {
728: $currentstring .= $token->[2];
729: } elsif ($target eq 'tex') {
730: my $post='\vskip 0 mm ';
731: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
732: if ($align eq 'center') {
733: $post='\end{center}';
734: } elsif ($align eq 'left') {
735: $post='} \hfill'.'\vskip 0 mm ';
736: } elsif ($align eq 'right') {
737: $post='}'.'\vskip 0 mm ';
738: }
739: $currentstring .= '}}'.$post;
740: }
741: return $currentstring;
742: }
743:
744: #-- <h3> tag
745: sub start_h3 {
746: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
747: my $currentstring = &end_p(); # Close off any prior para.
748: if ($target eq 'web' || $target eq 'webgrade') {
749: $currentstring .= $token->[4];
750: } elsif ($target eq 'tex') {
751: my $pre;
752: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
753: if ($align eq 'center') {
754: $pre='\begin{center}';
755: } elsif ($align eq 'left') {
756: $pre='\rlap{';
757: } elsif ($align eq 'right') {
758: $pre=' \hfill \llap{';
759: }
760: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
761: if (not defined $TeXsize) {$TeXsize="large";}
762: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
763: }
764: return $currentstring;
765: }
766:
767: sub end_h3 {
768: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
769: my $currentstring = '';
770: if ($target eq 'web' || $target eq 'webgrade') {
771: $currentstring .= $token->[2];
772: } elsif ($target eq 'tex') {
773: my $post='\vskip 0 mm ';
774: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
775: if ($align eq 'center') {
776: $post='\end{center}';
777: } elsif ($align eq 'left') {
778: $post='} \hfill'.'\vskip 0 mm ';
779: } elsif ($align eq 'right') {
780: $post='}'.'\vskip 0 mm ';
781: }
782: $currentstring .= '}}'.$post;
783: }
784: return $currentstring;
785: }
786:
787: #-- <h4> tag
788: sub start_h4 {
789: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
790: my $currentstring = &end_p(); # Close off any prior para.
791: if ($target eq 'web' || $target eq 'webgrade') {
792: $currentstring .= $token->[4];
793: } elsif ($target eq 'tex') {
794: my $pre;
795: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
796: if ($align eq 'center') {
797: $pre='\begin{center}';
798: } elsif ($align eq 'left') {
799: $pre='\rlap{';
800: } elsif ($align eq 'right') {
801: $pre=' \hfill \llap{';
802: }
803: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
804: if (not defined $TeXsize) {$TeXsize="large";}
805: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
806: }
807: return $currentstring;
808: }
809:
810: sub end_h4 {
811: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
812: my $currentstring = '';
813: if ($target eq 'web' || $target eq 'webgrade') {
814: $currentstring .= $token->[2];
815: } elsif ($target eq 'tex') {
816: my $post='\vskip 0 mm ';
817: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
818: if ($align eq 'center') {
819: $post='\end{center}';
820: } elsif ($align eq 'left') {
821: $post='} \hfill'.'\vskip 0 mm ';
822: } elsif ($align eq 'right') {
823: $post='}'.'\vskip 0 mm ';
824: }
825: $currentstring .= '}}'.$post;
826: }
827: return $currentstring;
828: }
829:
830: #-- <h5> tag
831: sub start_h5 {
832: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
833: my $currentstring = &end_p(); # Close off any prior paras.
834: if ($target eq 'web' || $target eq 'webgrade') {
835: $currentstring .= $token->[4];
836: } elsif ($target eq 'tex') {
837: my $pre;
838: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
839: if ($align eq 'center') {
840: $pre='\begin{center}';
841: } elsif ($align eq 'left') {
842: $pre='\rlap{';
843: } elsif ($align eq 'right') {
844: $pre=' \hfill \llap{';
845: }
846: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
847: if (not defined $TeXsize) {$TeXsize="large";}
848: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
849: }
850: return $currentstring;
851: }
852:
853: sub end_h5 {
854: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
855: my $currentstring = '';
856: if ($target eq 'web' || $target eq 'webgrade') {
857: $currentstring .= $token->[2];
858: } elsif ($target eq 'tex') {
859: my $post='\vskip 0 mm ';
860: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
861: if ($align eq 'center') {
862: $post='\end{center}';
863: } elsif ($align eq 'left') {
864: $post='} \hfill'.'\vskip 0 mm ';
865: } elsif ($align eq 'right') {
866: $post='}'.'\vskip 0 mm ';
867: }
868: $currentstring .= '}}'.$post;
869: }
870: return $currentstring;
871: }
872:
873: #-- <h6> tag
874: sub start_h6 {
875: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
876: my $currentstring = &end_p(); # Close off any prior paras.
877: if ($target eq 'web' || $target eq 'webgrade') {
878: $currentstring .= $token->[4];
879: } elsif ($target eq 'tex') {
880: my $pre;
881: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
882: if ($align eq 'center') {
883: $pre='\begin{center}';
884: } elsif ($align eq 'left') {
885: $pre='\rlap{';
886: } elsif ($align eq 'right') {
887: $pre=' \hfill \llap{';
888: }
889: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
890: if (not defined $TeXsize) {$TeXsize="large";}
891: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
892: }
893: return $currentstring;
894: }
895:
896: sub end_h6 {
897: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
898: my $currentstring = '';
899: if ($target eq 'web' || $target eq 'webgrade') {
900: $currentstring .= $token->[2];
901: } elsif ($target eq 'tex') {
902: my $post='\vskip 0 mm ';
903: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
904: if ($align eq 'center') {
905: $post='\end{center}';
906: } elsif ($align eq 'left') {
907: $post='} \hfill'.'\vskip 0 mm ';
908: } elsif ($align eq 'right') {
909: $post='}'.'\vskip 0 mm ';
910: }
911: $currentstring .= '}}'.$post;
912: }
913: return $currentstring;
914: }
915:
916: #--- <cite> tag (end tag required)
917: sub start_cite {
918: my ($target,$token) = @_;
919: my $currentstring = '';
920: if ($target eq 'web' || $target eq 'webgrade') {
921: $currentstring .= $token->[4];
922: } elsif ($target eq 'tex') {
923: $currentstring .= '\textit{';
924: }
925: return $currentstring;
926: }
927:
928: sub end_cite {
929: my ($target,$token) = @_;
930: my $currentstring = '';
931: if ($target eq 'web' || $target eq 'webgrade') {
932: $currentstring .= $token->[2];
933: } elsif ($target eq 'tex') {
934: $currentstring .= '}';
935: }
936: return $currentstring;
937: }
938:
939: #-- <i> tag (end tag required)
940: sub start_i {
941: my ($target,$token) = @_;
942: my $currentstring = '';
943: if ($target eq 'web' || $target eq 'webgrade') {
944: $currentstring .= $token->[4];
945: } elsif ($target eq 'tex') {
946: $currentstring .= '\textit{';
947: }
948: return $currentstring;
949: }
950:
951: sub end_i {
952: my ($target,$token) = @_;
953: my $currentstring = '';
954: if ($target eq 'web' || $target eq 'webgrade') {
955: $currentstring .= $token->[2];
956: } elsif ($target eq 'tex') {
957: $currentstring .= '}';
958: }
959: return $currentstring;
960: }
961:
962: #-- <address> tag (end tag required)
963: sub start_address {
964: my ($target,$token) = @_;
965: my $currentstring = '';
966: if ($target eq 'web' || $target eq 'webgrade') {
967: $currentstring .= $token->[4];
968: } elsif ($target eq 'tex') {
969: $currentstring .= '\textit{';
970: }
971: return $currentstring;
972: }
973:
974: sub end_address {
975: my ($target,$token) = @_;
976: my $currentstring = '';
977: if ($target eq 'web' || $target eq 'webgrade') {
978: $currentstring .= $token->[2];
979: } elsif ($target eq 'tex') {
980: $currentstring .= '}';
981: }
982: return $currentstring;
983: }
984:
985: #-- <dfn> tag (end tag required)
986: sub start_dfn {
987: my ($target,$token) = @_;
988: my $currentstring = '';
989: if ($target eq 'web' || $target eq 'webgrade') {
990: $currentstring .= $token->[4];
991: } elsif ($target eq 'tex') {
992: $currentstring .= '\textit{';
993: }
994: return $currentstring;
995: }
996:
997: sub end_dfn {
998: my ($target,$token) = @_;
999: my $currentstring = '';
1000: if ($target eq 'web' || $target eq 'webgrade') {
1001: $currentstring .= $token->[2];
1002: } elsif ($target eq 'tex') {
1003: $currentstring .= '}';
1004: }
1005: return $currentstring;
1006: }
1007:
1008: #-- <tt> tag (end tag required)
1009: sub start_tt {
1010: my ($target,$token) = @_;
1011: my $currentstring = '';
1012: if ($target eq 'web' || $target eq 'webgrade') {
1013: $currentstring .= $token->[4];
1014: } elsif ($target eq 'tex') {
1015: $currentstring .= '\texttt{';
1016: }
1017: return $currentstring;
1018: }
1019:
1020: sub end_tt {
1021: my ($target,$token) = @_;
1022: my $currentstring = '';
1023: if ($target eq 'web' || $target eq 'webgrade') {
1024: $currentstring .= $token->[2];
1025: } elsif ($target eq 'tex') {
1026: $currentstring .= '}';
1027: }
1028: return $currentstring;
1029: }
1030:
1031: #-- <kbd> tag (end tag required)
1032: sub start_kbd {
1033: my ($target,$token) = @_;
1034: my $currentstring = '';
1035: if ($target eq 'web' || $target eq 'webgrade') {
1036: $currentstring .= $token->[4];
1037: } elsif ($target eq 'tex') {
1038: $currentstring .= '\texttt{';
1039: }
1040: return $currentstring;
1041: }
1042:
1043: sub end_kbd {
1044: my ($target,$token) = @_;
1045: my $currentstring = '';
1046: if ($target eq 'web' || $target eq 'webgrade') {
1047: $currentstring .= $token->[2];
1048: } elsif ($target eq 'tex') {
1049: $currentstring .= '}';
1050: }
1051: return $currentstring;
1052: }
1053:
1054: #-- <code> tag (end tag required)
1055: sub start_code {
1056: my ($target,$token) = @_;
1057: my $currentstring = '';
1058: if ($target eq 'web' || $target eq 'webgrade') {
1059: $currentstring .= $token->[4];
1060: } elsif ($target eq 'tex') {
1061: $currentstring .= '\texttt{';
1062: }
1063: return $currentstring;
1064: }
1065:
1066: sub end_code {
1067: my ($target,$token) = @_;
1068: my $currentstring = '';
1069: if ($target eq 'web' || $target eq 'webgrade') {
1070: $currentstring .= $token->[2];
1071: } elsif ($target eq 'tex') {
1072: $currentstring .= '}';
1073: }
1074: return $currentstring;
1075: }
1076:
1077: #-- <em> tag (end tag required)
1078: sub start_em {
1079: my ($target,$token) = @_;
1080: my $currentstring = '';
1081: if ($target eq 'web' || $target eq 'webgrade') {
1082: $currentstring .= $token->[4];
1083: } elsif ($target eq 'tex') {
1084: $currentstring .= '\emph{';
1085: }
1086: return $currentstring;
1087: }
1088:
1089: sub end_em {
1090: my ($target,$token) = @_;
1091: my $currentstring = '';
1092: if ($target eq 'web' || $target eq 'webgrade') {
1093: $currentstring .= $token->[2];
1094: } elsif ($target eq 'tex') {
1095: $currentstring .= '}';
1096: }
1097: return $currentstring;
1098: }
1099:
1100: #-- <q> tag (end tag required)
1101: sub start_q {
1102: my ($target,$token) = @_;
1103: my $currentstring = '';
1104: if ($target eq 'web' || $target eq 'webgrade') {
1105: $currentstring .= $token->[4];
1106: } elsif ($target eq 'tex') {
1107: $currentstring .= '\emph{';
1108: }
1109: return $currentstring;
1110: }
1111:
1112: sub end_q {
1113: my ($target,$token) = @_;
1114: my $currentstring = '';
1115: if ($target eq 'web' || $target eq 'webgrade') {
1116: $currentstring .= $token->[2];
1117: } elsif ($target eq 'tex') {
1118: $currentstring .= '}';
1119: }
1120: return $currentstring;
1121: }
1122:
1123: # <p> is a bit strange since it does not require a closing </p>
1124: # However in latex, we must often output closing stuff to end
1125: # environments and {}'s etc. Therefore we do all the work
1126: # of figuring out the ending strings in the start tag processing,
1127: # and provide a mechanism to output the stop text external
1128: # to tag processing.
1129: #
1130: {
1131:
1132: my $closing_string = ''; # String required to close <p>
1133:
1134: # Some tags are <p> fragile meaning that <p> inside of them
1135: # does not work within TeX mode. This is managed via the
1136: # counter below:
1137: #
1138:
1139: my $para_disabled = 0;
1140:
1141: sub disable_para {
1142: $para_disabled++;
1143: }
1144: sub enable_para {
1145: $para_disabled--;
1146: }
1147:
1148:
1149: #-- <p> tag (end tag optional)
1150: #optional attribute - align="center|left|right"
1151: sub start_p {
1152: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1153: my $currentstring = '';
1154: if ($target eq 'web' || $target eq 'webgrade') {
1155: $currentstring .= &end_p(); # close off prior para if in progress.
1156: $currentstring .= $token->[4];
1157: if (! ($currentstring =~ /\//)) {
1158: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1159: }
1160: } elsif ($target eq 'tex' && !$para_disabled) {
1161:
1162: $currentstring .= &end_p(); # close off prior para if in progress.
1163: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1164: if ($align eq 'center') {
1165: $currentstring .='\begin{center}\par ';
1166: $closing_string = '\end{center}';
1167: if (&is_inside_of($tagstack, "table")) {
1168: $currentstring = ¢er_correction().$currentstring;
1169: }
1170: } elsif ($align eq 'right') {
1171: $currentstring.="\n".'{\flushright ';
1172: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1173: $closing_string= "}\n";
1174: } elsif ($align eq 'left') {
1175: $currentstring.= "\n".'{\flushleft ';
1176: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1177: $closing_string = "}\n";
1178: } else {
1179: $currentstring.='\par ';
1180: if (&is_inside_of($tagstack, 'table')) {
1181: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1182: } else {
1183: $closing_string = '\strut\\\\\strut ';
1184: }
1185: }
1186:
1187: }
1188: return $currentstring;
1189: }
1190: #
1191: # End paragraph processing just requires that we output the
1192: # closing string that was saved and blank it.
1193: sub end_p {
1194: # Note only 'tex' mode uses disable_para and enable_para
1195: # so we don't need to know the target in the check below:
1196:
1197: if (!$para_disabled) {
1198: my $current_string = $closing_string;
1199: $closing_string = ''; # Not in a para anymore.
1200: return $current_string;
1201: } else {
1202: return '';
1203: }
1204:
1205: }
1206: }
1207: #-- <br> tag (end tag forbidden)
1208: sub start_br {
1209: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1210: my $currentstring = '';
1211: if ($target eq 'web' || $target eq 'webgrade') {
1212: $currentstring .= $token->[4];
1213: } elsif ($target eq 'tex') {
1214: my @tempo=@$tagstack;
1215: my $signal=0;
1216: # Not going to factor this to is_inside_of since that would require
1217: # multiple stack traversals.
1218: #
1219: for (my $i=$#tempo;$i>=0;$i--) {
1220: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1221: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1222: $signal=1;
1223: }
1224: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1225: $signal = 1;
1226: }
1227: }
1228: if ($signal eq 1) {
1229: $currentstring .= ' \vskip 0 mm ';
1230: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1231: $currentstring .= '\strut \\\\ \strut ';
1232: } else { # Honor break in simple <sup></sup>
1233: $currentstring .= '}} \strut \\\\ \strut \ensuremath{^{';
1234: }
1235: }
1236: return $currentstring;
1237: }
1238:
1239: sub end_br {
1240: my ($target,$token) = @_;
1241: my $currentstring = '';
1242: if ($target eq 'web' || $target eq 'webgrade') {
1243: $currentstring .= $token->[2];
1244: }
1245: return $currentstring;
1246: }
1247:
1248: #-- <big> tag (end tag required)
1249: sub start_big {
1250: my ($target,$token) = @_;
1251: my $currentstring = '';
1252: if ($target eq 'web' || $target eq 'webgrade') {
1253: $currentstring .= $token->[4];
1254: } elsif ($target eq 'tex') {
1255: $currentstring .= '{\large ';
1256: }
1257: return $currentstring;
1258: }
1259:
1260: sub end_big {
1261: my ($target,$token) = @_;
1262: my $currentstring = '';
1263: if ($target eq 'web' || $target eq 'webgrade') {
1264: $currentstring .= $token->[2];
1265: } elsif ($target eq 'tex') {
1266: $currentstring .= '}';
1267: }
1268: return $currentstring;
1269: }
1270:
1271: #-- <small> tag (end tag required)
1272: sub start_small {
1273: my ($target,$token) = @_;
1274: my $currentstring = '';
1275: if ($target eq 'web' || $target eq 'webgrade') {
1276: $currentstring .= $token->[4];
1277: } elsif ($target eq 'tex') {
1278: $currentstring .= '{\footnotesize ';
1279: }
1280: return $currentstring;
1281: }
1282:
1283: sub end_small {
1284: my ($target,$token) = @_;
1285: my $currentstring = '';
1286: if ($target eq 'web' || $target eq 'webgrade') {
1287: $currentstring .= $token->[2];
1288: } elsif ($target eq 'tex') {
1289: $currentstring .= '}';
1290: }
1291: return $currentstring;
1292: }
1293:
1294: #-- <basefont> tag (end tag forbidden)
1295: sub start_basefont {
1296: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1297: my $currentstring = '';
1298: if ($target eq 'web' || $target eq 'webgrade') {
1299: $currentstring = $token->[4];
1300: } elsif ($target eq 'tex') {
1301: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1302: if (defined $basesize) {
1303: $currentstring = '{\\'.$basesize.' ';
1304: }
1305: }
1306: return $currentstring;
1307: }
1308:
1309: sub end_basefont {
1310: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1311: my $currentstring = '';
1312: if ($target eq 'web' || $target eq 'webgrade') {
1313: $currentstring = $token->[4];
1314: } elsif ($target eq 'tex') {
1315: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1316: if (defined $basesize) {
1317: $currentstring = '}';
1318: }
1319: }
1320: return $currentstring;
1321: }
1322:
1323: #-- <font> tag (end tag required)
1324: sub start_font {
1325: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1326: my $currentstring = '';
1327: if ($target eq 'web' || $target eq 'webgrade') {
1328: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1329: if ($face!~/symbol/i) {
1330: if (($env{'browser.fontenhance'} eq 'on') ||
1331: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1332: }
1333: $currentstring = $token->[4];
1334: } elsif ($target eq 'tex') {
1335: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1336: if (defined $fontsize) {
1337: $currentstring = '{\\'.$fontsize.' ';
1338: }
1339: }
1340: return $currentstring;
1341: }
1342:
1343: sub end_font {
1344: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1345: my $currentstring = '';
1346: if ($target eq 'web' || $target eq 'webgrade') {
1347: $currentstring = $token->[2];
1348: } elsif ($target eq 'tex') {
1349: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1350: if (defined $fontsize) {
1351: $currentstring = '}';
1352: }
1353: }
1354: return $currentstring;
1355: }
1356:
1357: #-- <strike> tag (end tag required)
1358: sub start_strike {
1359: my ($target,$token) = @_;
1360: my $currentstring = '';
1361: if ($target eq 'web' || $target eq 'webgrade') {
1362: $currentstring .= $token->[4];
1363: } elsif ($target eq 'tex') {
1364: &Apache::lonxml::startredirection();
1365: }
1366: return $currentstring;
1367: }
1368:
1369: sub end_strike {
1370: my ($target,$token) = @_;
1371: my $currentstring = '';
1372: if ($target eq 'web' || $target eq 'webgrade') {
1373: $currentstring .= $token->[2];
1374: } elsif ($target eq 'tex') {
1375: $currentstring=&Apache::lonxml::endredirection();
1376: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1377: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1378: $currentstring=~s/(\S)\s*$/$1\}/;
1379: }
1380: return $currentstring;
1381: }
1382:
1383: #-- <s> tag (end tag required)
1384: sub start_s {
1385: my ($target,$token) = @_;
1386: my $currentstring = '';
1387: if ($target eq 'web' || $target eq 'webgrade') {
1388: $currentstring .= $token->[4];
1389: } elsif ($target eq 'tex') {
1390: &Apache::lonxml::startredirection();
1391: }
1392: return $currentstring;
1393: }
1394:
1395: sub end_s {
1396: my ($target,$token) = @_;
1397: my $currentstring = '';
1398: if ($target eq 'web' || $target eq 'webgrade') {
1399: $currentstring .= $token->[2];
1400: } elsif ($target eq 'tex') {
1401: $currentstring=&Apache::lonxml::endredirection();
1402: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1403: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1404: $currentstring=~s/(\S)\s*$/$1\}/;
1405: }
1406: return $currentstring;
1407: }
1408:
1409: #-- <sub> tag (end tag required)
1410: sub start_sub {
1411: my ($target,$token) = @_;
1412: my $currentstring = '';
1413: if ($target eq 'web' || $target eq 'webgrade') {
1414: $currentstring .= $token->[4];
1415: } elsif ($target eq 'tex') {
1416: $currentstring .= '\ensuremath{_{';
1417: }
1418: return $currentstring;
1419: }
1420:
1421: sub end_sub {
1422: my ($target,$token) = @_;
1423: my $currentstring = '';
1424: if ($target eq 'web' || $target eq 'webgrade') {
1425: $currentstring .= $token->[2];
1426: } elsif ($target eq 'tex') {
1427: $currentstring .= '}}';
1428: }
1429: return $currentstring;
1430: }
1431:
1432: #-- <sup> tag (end tag required)
1433: sub start_sup {
1434: my ($target,$token) = @_;
1435: my $currentstring = '';
1436: if ($target eq 'web' || $target eq 'webgrade') {
1437: $currentstring .= $token->[4];
1438: } elsif ($target eq 'tex') {
1439: $currentstring .= '\ensuremath{^{';
1440: }
1441: return $currentstring;
1442: }
1443:
1444: sub end_sup {
1445: my ($target,$token) = @_;
1446: my $currentstring = '';
1447: if ($target eq 'web' || $target eq 'webgrade') {
1448: $currentstring .= $token->[2];
1449: } elsif ($target eq 'tex') {
1450: $currentstring .= '}}';
1451: }
1452: return $currentstring;
1453: }
1454:
1455: #-- <hr> tag (end tag forbidden)
1456: sub start_hr {
1457: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1458: my $currentstring = &end_p(); # End enclosing para.
1459: if ($target eq 'web' || $target eq 'webgrade') {
1460: $currentstring .= $token->[4];
1461: } elsif ($target eq 'tex') {
1462: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1463: if (defined $LaTeXwidth) {
1464: if ($LaTeXwidth=~/^%/) {
1465: substr($LaTeXwidth,0,1)='';
1466: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1467: }
1468: } else {
1469: $LaTeXwidth ='0.9\textwidth';
1470: }
1471: my ($pre,$post);
1472: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1473: if (($align eq 'center') || (not defined $align)) {
1474: $pre=''; $post='';
1475: } elsif ($align eq 'left') {
1476: $pre='\rlap{'; $post='} \hfill';
1477: } elsif ($align eq 'right') {
1478: $pre=' \hfill \llap{'; $post='}';
1479: }
1480: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1481: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1482: }
1483: return $currentstring;
1484: }
1485:
1486: sub end_hr {
1487: my ($target,$token) = @_;
1488: my $currentstring = '';
1489: if ($target eq 'web' || $target eq 'webgrade') {
1490: $currentstring .= $token->[2];
1491: }
1492: return $currentstring;
1493: }
1494:
1495: #-- <div> tag (end tag required)
1496: {
1497:
1498: # Since div can be nested, the stack below is used
1499: # in 'tex' mode to store the ending strings
1500: # for the div stack.
1501:
1502: my @div_end_stack;
1503:
1504: sub start_div {
1505: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1506: my $currentstring = &end_p(); # Close enclosing para.
1507: if ($target eq 'web' || $target eq 'webgrade') {
1508: $currentstring .= $token->[4];
1509: }
1510: if ($target eq 'tex') {
1511: # 4 possible alignments: left, right, center, and -missing-.
1512:
1513: my $endstring = '';
1514:
1515: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1516: $safeeval, undef, 1));
1517: if ($align eq 'center') {
1518: $currentstring .= '\begin{center}';
1519: $endstring = '\end{center}';
1520: if (&is_inside_of($tagstack, "table")) {
1521: $currentstring = ¢er_correction().$currentstring;
1522: }
1523: }
1524: elsif ($align eq 'right') {
1525: $currentstring .= '\begin{flushright}';
1526: $endstring .= '\end{flushright}';
1527: } elsif ($align eq 'left') {
1528: $currentstring .= '\begin{flushleft}';
1529: $endstring = '\end{flushleft}';
1530: } else {
1531:
1532: }
1533: $currentstring .= "\n"; # For human readability.
1534: $endstring = "\n$endstring\n"; # For human readability
1535: push(@div_end_stack, $endstring);
1536: }
1537: return $currentstring;
1538: }
1539:
1540: sub end_div {
1541: my ($target,$token) = @_;
1542: my $currentstring = '';
1543: if ($target eq 'web' || $target eq 'webgrade') {
1544: $currentstring .= $token->[2];
1545: }
1546: if ($target eq 'tex') {
1547: my $endstring = pop @div_end_stack;
1548: $currentstring .= $endstring;
1549: }
1550: return $currentstring;
1551: }
1552: }
1553:
1554: #-- <a> tag (end tag required)
1555: sub start_a {
1556: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1557: my $currentstring = '';
1558: if ($target eq 'web' || $target eq 'webgrade') {
1559: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1560: undef,1);
1561: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1562: } elsif ($target eq 'tex') {
1563: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1564: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1565: if ($a=~/\S/) {
1566: $a=~s/([^\\])%/$1\\\%/g;
1567: $currentstring .= '\ref{URI: '.$a.'}';
1568: } elsif ($b=~/\S/) {
1569: $currentstring .= '\ref{Anchor: '.$b.'}';
1570: } else {
1571: $currentstring.='';
1572: }
1573: }
1574: return $currentstring;
1575: }
1576:
1577: sub end_a {
1578: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1579: my $currentstring = '';
1580: if ($target eq 'web' || $target eq 'webgrade') {
1581: $currentstring .= $token->[2];
1582: }
1583: return $currentstring;
1584: }
1585:
1586: #-- <li> tag (end tag optional)
1587: sub start_li {
1588: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1589: my $currentstring = '';
1590: if ($target eq 'web' || $target eq 'webgrade') {
1591: $currentstring = $token->[4];
1592: } elsif ($target eq 'tex') {
1593: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1594: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1595: #FIXME need to support types i and I
1596: if ($type=~/disc/) {
1597: $currentstring .= ' \item[$\bullet$] ';
1598: } elsif ($type=~/circle/) {
1599: $currentstring .= ' \item[$\circ$] ';
1600: } elsif ($type=~/square/) {
1601: $currentstring .= ' \item[$\diamond$] ';
1602: } elsif ($type eq '1') {
1603: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1604: } elsif ($type eq 'A') {
1605: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1606: } elsif ($type eq 'a') {
1607: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1608: } elsif ($value ne '') {
1609: $currentstring .= ' \item['.$value.'] ';
1610: } else {
1611: $currentstring .= ' \item ';
1612: }
1613: $Apache::londefdef::list_index++;
1614: }
1615: return $currentstring;
1616: }
1617:
1618: sub end_li {
1619: my ($target,$token) = @_;
1620: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1621: if ($target eq 'web' || $target eq 'webgrade') {
1622: $currentstring .= $token->[2];
1623: }
1624: return $currentstring;
1625: }
1626:
1627: #-- <u> tag (end tag required)
1628: sub start_u {
1629: my ($target,$token) = @_;
1630: my $currentstring = '';
1631: if ($target eq 'web' || $target eq 'webgrade') {
1632: $currentstring .= $token->[4];
1633: } elsif ($target eq 'tex') {
1634: &Apache::lonxml::startredirection();
1635: }
1636: return $currentstring;
1637: }
1638:
1639: sub end_u {
1640: my ($target,$token) = @_;
1641: my $currentstring = '';
1642: if ($target eq 'web' || $target eq 'webgrade') {
1643: $currentstring .= $token->[2];
1644: } elsif ($target eq 'tex') {
1645: $currentstring=&Apache::lonxml::endredirection();
1646: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1647: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1648: $currentstring=~s/(\S)\s*$/$1\}/;
1649: }
1650: return $currentstring;
1651: }
1652:
1653: #-- <ul> tag (end tag required)
1654: sub start_ul {
1655: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1656: my $currentstring = &end_p(); # Close off enclosing list.
1657: if ($target eq 'web' || $target eq 'webgrade') {
1658: $currentstring .= $token->[4];
1659: } elsif ($target eq 'tex') {
1660: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1661: $Apache::londefdef::list_index=0;
1662: if ($TeXtype eq 'disc') {
1663: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1664: '\renewcommand{\labelitemii}{$\bullet$}'.
1665: '\renewcommand{\labelitemiii}{$\bullet$}'.
1666: '\renewcommand{\labelitemiv}{$\bullet$}';
1667: } elsif ($TeXtype eq 'circle') {
1668: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1669: '\renewcommand{\labelitemii}{$\circ$}'.
1670: '\renewcommand{\labelitemiii}{$\circ$}'.
1671: '\renewcommand{\labelitemiv}{$\circ$}';
1672: } elsif ($TeXtype eq 'square') {
1673: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1674: '\renewcommand{\labelitemii}{$\diamond$}'.
1675: '\renewcommand{\labelitemiii}{$\diamond$}'.
1676: '\renewcommand{\labelitemiv}{$\diamond$}';
1677: }
1678: $currentstring .= '\strut \begin{itemize}';
1679: }
1680: return $currentstring;
1681: }
1682:
1683: sub end_ul {
1684: my ($target,$token) = @_;
1685: my $currentstring = '';
1686: if ($target eq 'web' || $target eq 'webgrade') {
1687: $currentstring = $token->[2];
1688: } elsif ($target eq 'tex') {
1689: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1690: '\renewcommand{\labelitemii}{$\bullet$}'.
1691: '\renewcommand{\labelitemiii}{$\bullet$}'.
1692: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1693: }
1694: return $currentstring;
1695: }
1696:
1697: #-- <menu> tag (end tag required)
1698: sub start_menu {
1699: my ($target,$token) = @_;
1700: my $currentstring = '';
1701: if ($target eq 'web' || $target eq 'webgrade') {
1702: $currentstring = $token->[4];
1703: } elsif ($target eq 'tex') {
1704: $currentstring = " \\begin{itemize} ";
1705: }
1706: return $currentstring;
1707: }
1708:
1709: sub end_menu {
1710: my ($target,$token) = @_;
1711: my $currentstring = '';
1712: if ($target eq 'web' || $target eq 'webgrade') {
1713: $currentstring = $token->[2];
1714: } elsif ($target eq 'tex') {
1715: $currentstring = " \\end{itemize}";
1716: }
1717: return $currentstring;
1718: }
1719:
1720: #-- <dir> tag (end tag required)
1721: sub start_dir {
1722: my ($target,$token) = @_;
1723: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1724: if ($target eq 'web' || $target eq 'webgrade') {
1725: $currentstring .= $token->[4];
1726: } elsif ($target eq 'tex') {
1727: $currentstring .= " \\begin{itemize} ";
1728: }
1729: return $currentstring;
1730: }
1731:
1732: sub end_dir {
1733: my ($target,$token) = @_;
1734: my $currentstring = '';
1735: if ($target eq 'web' || $target eq 'webgrade') {
1736: $currentstring = $token->[2];
1737: } elsif ($target eq 'tex') {
1738: $currentstring = " \\end{itemize}";
1739: }
1740: return $currentstring;
1741: }
1742:
1743: #-- <ol> tag (end tag required)
1744: sub start_ol {
1745: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1746: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1747: if ($target eq 'web' || $target eq 'webgrade') {
1748: $currentstring .= $token->[4];
1749: } elsif ($target eq 'tex') {
1750: $Apache::londefdef::list_index=0;
1751: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1752: if ($type eq '1') {
1753: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1754: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1755: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1756: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1757: } elsif ($type eq 'A') {
1758: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1759: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1760: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1761: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1762: } elsif ($type eq 'a') {
1763: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1764: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1765: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1766: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1767: } elsif ($type eq 'i') {
1768: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1769: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1770: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1771: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1772: } elsif ($type eq 'I') {
1773: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1774: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1775: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1776: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1777: }
1778: $currentstring .= '\strut \begin{enumerate}';
1779: }
1780: return $currentstring;
1781: }
1782:
1783: sub end_ol {
1784: my ($target,$token) = @_;
1785: my $currentstring = '';
1786: if ($target eq 'web' || $target eq 'webgrade') {
1787: $currentstring = $token->[2];
1788: } elsif ($target eq 'tex') {
1789: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1790: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1791: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1792: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1793: }
1794: return $currentstring;
1795: }
1796:
1797: #-- <dl> tag (end tag required)
1798: sub start_dl {
1799: my ($target,$token) = @_;
1800: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1801: if ($target eq 'web' || $target eq 'webgrade') {
1802: $currentstring .= $token->[4];
1803: } elsif ($target eq 'tex') {
1804: $currentstring .= '\begin{description}';
1805: $Apache::londefdef::DL++;
1806: push(@Apache::londefdef::description,[]);
1807: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1808: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1809: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1810: }
1811: return $currentstring;
1812: }
1813:
1814: sub end_dl {
1815: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1816: my $currentstring = '';
1817: if ($target eq 'web' || $target eq 'webgrade') {
1818: $currentstring = $token->[2];
1819: } elsif ($target eq 'tex') {
1820: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1821: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1822: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1823: $currentstring.=' '.$element.' ';
1824: }
1825: pop(@Apache::londefdef::description);
1826: $currentstring.='\end{description}';
1827: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1828: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1829: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1830: $Apache::londefdef::DL--;
1831: }
1832: return $currentstring;
1833: }
1834:
1835: #-- <dt> tag (end tag optional)
1836: sub start_dt {
1837: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1838: my $currentstring='';
1839: if ($target eq 'web' || $target eq 'webgrade') {
1840: $currentstring = $token->[4];
1841: } elsif ($target eq 'tex') {
1842: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1843: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1844: &Apache::lonxml::startredirection();
1845: $Apache::londefdef::DT[-1]++;
1846: $Apache::londefdef::seenDT[-1]=1;
1847: }
1848: return $currentstring;
1849: }
1850:
1851: sub end_dt {
1852: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1853: my $currentstring = '';
1854: if ($target eq 'web' || $target eq 'webgrade') {
1855: $currentstring = $token->[2];
1856: } elsif ($target eq 'tex') {
1857: if ($Apache::londefdef::DT[-1]) {
1858: my $data=&item_cleanup();
1859: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1860: $Apache::londefdef::DT[-1]--;
1861: }
1862: }
1863: return $currentstring;
1864: }
1865:
1866: sub item_cleanup {
1867: my $item=&Apache::lonxml::endredirection();
1868: $item=~s/\\begin{center}//g;
1869: $item=~s/\\end{center}//g;
1870: return $item;
1871: }
1872:
1873: #-- <dd> tag (end tag optional)
1874: sub start_dd {
1875: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1876: my $currentstring = '';
1877: if ($target eq 'web' || $target eq 'webgrade') {
1878: $currentstring = $token->[4];
1879: } elsif ($target eq 'tex') {
1880: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1881: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1882: if (!$Apache::londefdef::seenDT[-1]) {
1883: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1884: }
1885: push(@{$Apache::londefdef::description[-1]},'');
1886: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1887: $Apache::londefdef::DD[-1]++;
1888: &Apache::lonxml::startredirection();
1889: }
1890: return $currentstring;
1891: }
1892:
1893: sub end_dd {
1894: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1895: my $currentstring = '';
1896: if ($target eq 'web' || $target eq 'webgrade') {
1897: $currentstring = $token->[2];
1898: } elsif ($target eq 'tex') {
1899: $Apache::londefdef::description[-1]->[-1].=
1900: &Apache::lonxml::endredirection().' \vskip 0mm ';
1901: $Apache::londefdef::DD[-1]--;
1902: }
1903: return $currentstring;
1904: }
1905:
1906: #-- <table> tag (end tag required)
1907: # <table> also ends any prior <p> that is not closed.
1908: # but, unless I allow <p>'s to nest, that's the
1909: # only way I could think of to allow <p> in
1910: # <tr> <th> bodies
1911: #
1912: #list of supported attributes: border,width,TeXwidth
1913: sub start_table {
1914: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1915: my $textwidth = '';
1916: my $currentstring = &end_p();
1917: if ($target eq 'web' || $target eq 'webgrade') {
1918: $currentstring .= $token->[4];
1919: } elsif ($target eq 'tex') {
1920: push(@Apache::londefdef::table, {});
1921: $Apache::londefdef::table[-1]{'row_number'} = -1;
1922: #maximum table's width (default coincides with text line length)
1923: if ($#Apache::londefdef::table==0) {
1924: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1925: $textwidth=~/(\d+\.?\d*)/;
1926: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1927: } else {
1928: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1929: #the maximum width of nested table is determined by LATeX width of parent cell
1930: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1931: } else {
1932: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1933: $textwidth=$Apache::londefdef::table[-2]{'width'};
1934: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1935: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1936: }
1937: }
1938: }
1939:
1940: # width either comes forced from the TeXwidth or the width parameters.
1941: # in either case it can be a percentage or absolute width.
1942: # in the width case we ignore absolute width
1943: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1944: if (!defined($TeXwidth)) {
1945: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1946: $safeeval,undef,1);
1947: if ($htmlwidth =~ /%/) {
1948: $TeXwidth = $htmlwidth;
1949: } else {
1950: $TeXwidth = $textwidth;
1951: }
1952: } else {
1953: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1954: }
1955: if ($TeXwidth=~/%/) {
1956: $Apache::londefdef::table[-1]{'percent'}=1;
1957: $TeXwidth=~/(\d+)/;
1958: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1959: } else {
1960: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1961: }
1962: # In the end, however the table width cannot be wider than $textwidth...
1963:
1964: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1965: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1966: }
1967:
1968: #table's border
1969: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1970: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1971: unless (defined $border) { $border = 0; }
1972: if ($border) {
1973: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1974: $Apache::londefdef::table[-1]{'vinc'} = '&';
1975: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1976: } else {
1977: $Apache::londefdef::table[-1]{'hinc'} = '';
1978: $Apache::londefdef::table[-1]{'vinc'} = '&';
1979: $Apache::londefdef::table[-1]{'vvinc'} = '';
1980: }
1981: if ($#Apache::londefdef::table==0) {
1982: # Note that \newline seems to destroy the alignment envs.
1983: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1984: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1985: }
1986: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1987: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1988: $Apache::londefdef::table[-1]{'objectlen'}=[];
1989: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1990: $Apache::londefdef::table[-1]{'maxlen'}=[];
1991: $Apache::londefdef::table[-1]{'minlen'}=[];
1992: $Apache::londefdef::table[-1]{'content'}=[];
1993: $Apache::londefdef::table[-1]{'align'}=[];
1994: if (&is_inside_of($tagstack, 'sup')) {
1995: $currentstring .= '}} \\\\ \ensuremath{^{ ';
1996: }
1997: if (&is_inside_of($tagstack, 'sub')) {
1998: $currentstring .= '}} \\\\ \ensuremath{_{ ';
1999: }
2000: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2001:
2002:
2003: }
2004: return $currentstring;
2005: }
2006:
2007: sub end_table {
2008: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2009: my $currentstring = '';
2010: if ($target eq 'web' || $target eq 'webgrade') {
2011: $currentstring = $token->[2];
2012: } elsif ($target eq 'tex') {
2013: my $inmemory = '';
2014: my $output = '';
2015: my $WARNING='';
2016: #width of columns from TeXwidth attributes
2017:
2018: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2019: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2020: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2021: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2022: }
2023: }
2024: }
2025: #free space and number of empty columns
2026: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2027: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2028: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2029: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2030: $empty_columns++;
2031: } else {
2032: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2033: }
2034: }
2035: #boundaries for contents columns
2036: my @min_len=();#columns can not be narrower
2037: my @max_len=();#maximum length of column
2038: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2039: my ($localmin,$localmax)=(0,0);
2040: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2041: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2042: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2043: }
2044: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2045: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2046: }
2047: }
2048: push @min_len, $localmin;
2049: push @max_len, $localmax;
2050: }
2051: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2052: my $localmin=0,;
2053: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2054: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2055: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2056: }
2057: }
2058: if ($max_len[$jn]<$localmin) {
2059: $max_len[$jn]=$localmin;
2060: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2061: }#object size is bigger
2062: if ($min_len[$jn]<$localmin) {
2063: $min_len[$jn]=$localmin;
2064: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2065: }#object size is bigger
2066: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2067: $min_len[$jn]=0;
2068: $max_len[$jn]=0;
2069: }
2070: }
2071: #final adjustment of column width
2072: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2073: my @adjust=();
2074: #step 1. adjustment by maximum value
2075: my $space_neeeded=0;
2076: for (my $jn=0;$jn<=$#max_len;$jn++) {
2077: $space_neeeded=$space_neeeded+$max_len[$jn];
2078: }
2079: if ($space_neeeded<=$available_space) {
2080: for (my $jn=0;$jn<=$#max_len;$jn++) {
2081: if ($fwidth[$jn]==0) {
2082: $fwidth[$jn]=$max_len[$jn];
2083: }
2084: }
2085: } else {
2086: #step 2. adjustment by minimum value (estimation)
2087: $space_neeeded=0;
2088: for (my $jn=0;$jn<=$#min_len;$jn++) {
2089: $space_neeeded+=$min_len[$jn];
2090: }
2091: if ($space_neeeded>$available_space) {
2092: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2093: for (my $jn=0;$jn<=$#max_len;$jn++) {
2094: if ($fwidth[$jn]==0) {
2095: $fwidth[$jn]=$min_len[$jn];
2096: }
2097: }
2098: #check if we have objects which can be scaled
2099: my $how_many_to_scale=0;
2100: my @to_scale=();
2101: for (my $jn=0;$jn<=$#max_len;$jn++) {
2102: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2103: $how_many_to_scale++;
2104: push @to_scale, $jn;
2105: }
2106: }
2107: if ($how_many_to_scale>0) {
2108: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2109: foreach my $jn (@to_scale) {
2110: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2111: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2112: if ($1 ne '') {
2113: my $current_length=&recalc($1);
2114: $current_length=~/(\d+\.?\d*)/;
2115: $current_length=$current_length-$space_to_adjust;
2116: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2117: }
2118: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2119: if ($1 ne '') {
2120: my $current_length=$1;
2121: $current_length=$current_length-$space_to_adjust;
2122: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2123: }
2124: }
2125: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2126: }
2127: }
2128: } else {
2129: #step 3. adjustment over minimal + corrections
2130: my $enlarge_coef=$available_space/$space_neeeded;
2131: my $acsessive=0;
2132: for (my $jn=0;$jn<=$#min_len;$jn++) {
2133: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2134: if ($adjust[$jn]>$max_len[$jn]) {
2135: $fwidth[$jn]=$max_len[$jn];
2136: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2137: $adjust[$jn]=0;
2138: }
2139: }
2140: if ($acsessive>0) {
2141: #we have an excess of space and can redistribute it
2142: my $notempty_columns=0;
2143: for (my $jn=0;$jn<=$#min_len;$jn++) {
2144: if ($adjust[$jn]!=0) {
2145: $notempty_columns++;
2146: }
2147: }
2148: my $per_column=$acsessive/$notempty_columns;
2149: for (my $jn=0;$jn<=$#min_len;$jn++) {
2150: if ($adjust[$jn]!=0) {
2151: $adjust[$jn]+=$per_column;
2152: $fwidth[$jn]=$adjust[$jn];
2153: }
2154: }
2155: } else {
2156: for (my $jn=0;$jn<=$#min_len;$jn++) {
2157: $fwidth[$jn]=$adjust[$jn];
2158: }
2159: }
2160: }
2161: }
2162: #use all available width if it is defined in % or as TeXwidth
2163: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2164: my $current=0;
2165: for (my $i=0;$i<=$#fwidth;$i++) {
2166: $current+=$fwidth[$i];
2167: }
2168: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2169: for (my $i=0;$i<=$#fwidth;$i++) {
2170: $fwidth[$i]*=$coef;
2171: }
2172: }
2173: #removing of empty columns if allowed
2174: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2175: if ($permission eq 'yes') {
2176: my @cleaned_table=();
2177: my @cleaned_header=();
2178: my $colind=0;
2179: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2180: if ($fwidth[$jn]!=0) {
2181: #we need to copy column
2182: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2183: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2184: $cleaned_header[$colind]=$fwidth[$jn];
2185: }
2186: $colind++;
2187: }
2188: }
2189: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2190: @fwidth=@cleaned_header;
2191: }
2192: #construct header of the table
2193: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2194: for (my $in=0;$in<=$#fwidth;$in++) {
2195: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2196: }
2197: $header_of_table .= '}';
2198: #fill the table
2199: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2200: my $have_rowspan = 0;
2201: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2202:
2203: #-----------------------------------------------------------
2204: # I think this order of doing things will ensure that
2205: # single rowspan, columspan and combined row/colspans will
2206: # work correctly. LaTeX is delicate here.
2207: # RF.
2208:
2209: # Start a rowspan if necessary:
2210:
2211: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2212: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2213: #
2214: # Do the appropriate magic if this has a colspan
2215: #
2216:
2217: if ($colspan > 1) {
2218: my $spanwidth = 0;
2219: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2220: $spanwidth += $fwidth[$spancol];
2221: }
2222: $output .= '\multicolumn{'.
2223: $colspan
2224: ."}";
2225: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2226: $output .= '{|c|}{';
2227: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2228: $output .= '{|r|}{';
2229: }
2230: else {
2231: $output .= "{|p{$spanwidth mm}|}{";
2232: }
2233:
2234: }
2235:
2236: # Rowspan... if colspan is 1, and there's an alignment we'll need
2237: # to kick in a multicolumn in order to get the alignment spec.
2238: # this must precede the multirow or LaTex gets quite upset.
2239: # Naturally if colspan > 1 we've already done that above ^
2240: #
2241: my $multirow_aligned = 0;
2242: if ($rowspan > 1) {
2243: if ($colspan == 1) {
2244: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2245: $output .= '\multicolumn{1}{|c|}{';
2246: $multirow_aligned = 1;
2247: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2248: $output .= '\multicolumn{1}{|r|}{';
2249: $multirow_aligned = 1;
2250: }
2251: }
2252: $have_rowspan++;
2253: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2254: #
2255: # If we did not throw in a multicolumn to align, then add
2256: # an extra {
2257: # so we close correctly without having to keep additional state
2258: # around
2259: #
2260: if (!$multirow_aligned) {
2261: $output .= '{';
2262: }
2263: }
2264: if (($rowspan eq '^') || ($rowspan eq '_')) {
2265: $have_rowspan++;
2266: }
2267: #--------------------------------------------------------------
2268:
2269:
2270: # For right and center alignment of single cells.
2271: # we are going to use a multicolumn with a span of 1 to specify alignment.
2272: #
2273: if ($colspan == 1 && $rowspan == 1) {
2274: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2275: $output .= '\multicolumn{1}{|c|}{';
2276: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2277: $output .= '\multicolumn{1}{|r|}{';
2278: }
2279: }
2280:
2281: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2282:
2283: if (($colspan == 1 && $rowspan == 1) &&
2284: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2285: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2286: $output .= '}';
2287: }
2288:
2289: # Close off any open multirow:
2290:
2291: if ($rowspan > 1) {
2292: $output .= '}}';
2293: }
2294: # Close off the colspan...
2295: #
2296: if ($colspan > 1) {
2297: $output .= '}';
2298: $jn += $colspan-1; # Adjust for number of rows really left.
2299: }
2300: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2301: }
2302: # If have_rowspan > 0, and borders are on, then
2303: # we need to do more than put an \hline at the bottom of row.
2304: # we need to do the appropriate \cline to ensure that
2305: # the spanned rows don't have \hlines through them.
2306:
2307: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2308: $output .= ' \\\\ ';
2309: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2310: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2311: if ($rowspan ne "^") {
2312: if (($rowspan <= 1) || ($rowspan eq '_')) {
2313: my $column = $jn+1;
2314: $output .= '\cline{'.$column.'-'.$column.'} ';
2315: }
2316: }
2317: }
2318:
2319: } else {
2320: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2321: }
2322: }
2323: # Note that \newline destroys alignment env's produced by e.g. <div>
2324: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2325: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2326: if ($#Apache::londefdef::table > 0) {
2327: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2328: # Figure out max/and min width by summing us and then
2329: # apply that to the current column of the table we nest in
2330: # if it's larger than the current width or the current width
2331: # is undefined.
2332: #
2333: my $min_nested_width = 0;
2334: my $max_nested_width = 0;
2335: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2336: $min_nested_width += $min_len[$col];
2337: $max_nested_width += $max_len[$col];
2338:
2339: }
2340: # Fudge in an extra 5 mm for borders etc:
2341:
2342: $min_nested_width += 5;
2343: $max_nested_width += 5;
2344:
2345: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2346: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2347: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2348: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2349: }
2350: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2351: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2352: }
2353:
2354: pop @Apache::londefdef::table;
2355: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2356: } else {
2357: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2358: pop @Apache::londefdef::table;
2359: undef @Apache::londefdef::table;
2360: }
2361: }
2362: return $currentstring;
2363: }
2364:
2365: #-- <tr> tag (end tag optional)
2366: sub start_tr {
2367: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2368: my $currentstring = '';
2369: if ($target eq 'web' || $target eq 'webgrade') {
2370: $currentstring = $token->[4];
2371: } elsif ($target eq 'tex') {
2372: $Apache::londefdef::table[-1]{'row_number'}++;
2373: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2374: if ($alignchar ne '') {
2375: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2376: } else {
2377: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2378: }
2379: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2380: #
2381: # Need to save the number of table columns to preserve the max # columns.
2382: #
2383: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2384: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2385: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2386: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2387: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2388: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2389: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2390: }
2391: return $currentstring;
2392: }
2393:
2394: sub end_tr {
2395: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2396: my $currentstring = &end_p(); # Close any pending <p> in the row.
2397: if ($target eq 'web' || $target eq 'webgrade') {
2398: $currentstring .= $token->[2];
2399: } elsif ($target eq 'tex') {
2400: if ($Apache::londefdef::TD_redirection) {
2401: &end_td_tex($parstack,$parser,$safeeval);
2402: }
2403: # Counter columns must be the maximum number of columns seen
2404: # in the table so far so:
2405: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2406: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2407: }
2408:
2409:
2410:
2411: }
2412: return $currentstring;
2413: }
2414:
2415: #-- <td> tag (end tag optional)
2416: sub start_td {
2417: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2418: my $currentstring = '';
2419: if ($target eq 'web' || $target eq 'webgrade') {
2420: $currentstring = $token->[4];
2421: } elsif ($target eq 'tex') {
2422: $Apache::londefdef::TD_redirection = 1;
2423: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2424: }
2425: return $currentstring;
2426: }
2427:
2428: sub tag_check {
2429: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2430: my @ar=@$parstack;
2431: for (my $i=$#ar-1;$i>=0;$i--) {
2432: if (lc($$tagstack[$i]) eq $good_tag) {
2433: &start_td_tex($parstack,$parser,$safeeval);
2434: last;
2435: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2436: splice @ar, $i+1;
2437: &end_td_tex(\@ar,$parser,$safeeval);
2438: &start_td_tex($parstack,$parser,$safeeval);
2439: last;
2440: }
2441: }
2442: return '';
2443: }
2444:
2445: sub start_td_tex {
2446: my ($parstack,$parser,$safeeval) = @_;
2447: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2448: if ($alignchar eq '') {
2449: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2450: }
2451: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2452: $Apache::londefdef::table[-1]{'counter_columns'}++;
2453: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2454: if (defined $TeXwidth) {
2455: my $current_length=&recalc($TeXwidth);
2456: $current_length=~/(\d+\.?\d*)/;
2457: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2458: }
2459: &Apache::lonxml::startredirection();
2460: return '';
2461: }
2462:
2463: sub end_td_tex {
2464: my ($parstack,$parser,$safeeval) = @_;
2465: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2466: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2467: my $data = &Apache::lonxml::endredirection();
2468:
2469: # The rowspan array of the table indicates which cells are part of a span.
2470: # n indicates the start of a span set of n rows.
2471: # ^ indicates a cell that continues a span set.
2472: # _ indicates the cell is at the bottom of a span set.
2473: # If this and subsequent cells are part of a rowspan, we must
2474: # push along the row until we find one that is not.
2475:
2476: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2477: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2478: # Part of a span.
2479: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2480: $current_column++;
2481: }
2482: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2483:
2484:
2485: # Get the column and row spans.
2486: # Colspan can be done via \multicolumn if I can figure out the data structs.
2487:
2488: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2489: if (!$colspan) {
2490: $colspan = 1;
2491: }
2492:
2493: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2494: if (!$rowspan) {
2495: $rowspan = 1;
2496: }
2497:
2498:
2499:
2500: for (my $c = 0; $c < $colspan; $c++) {
2501: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2502: for (my $i = 1; $i < $rowspan; $i++) {
2503: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2504: if ($i == ($rowspan-1)) {
2505: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2506: }
2507: }
2508: }
2509:
2510: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2511: if (defined $TeXwidth) {
2512: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2513: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2514: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2515: } else {
2516: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2517: my $garbage_data=$data;
2518: my $fwidth=0;
2519: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2520: my $current_length=&recalc($1);
2521: $current_length=~/(\d+\.?\d*)/;
2522: if ($fwidth<$1) {$fwidth=$1;}
2523: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2524: }
2525: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2526: my $current_length=$1;
2527: if ($fwidth<$current_length) {$fwidth=$current_length;}
2528: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2529: }
2530: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2531: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2532: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2533: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2534: } elsif ($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)*/) {
2535: my $garbage_data=$data;
2536: my $fwidth=0;
2537: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2538: my $current_length=&recalc($1);
2539: $current_length=~/(\d+\.?\d*)/;
2540: if ($fwidth<$1) {$fwidth=$1;}
2541: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2542: }
2543: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2544: my $current_length=&recalc($1);
2545: $current_length=~/(\d+\.?\d*)/;
2546: if ($fwidth<$1) {$fwidth=$1;}
2547: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2548: }
2549: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2550: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2551: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2552: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2553: $data=~s/\\\\\s*$//;
2554: } else {
2555: $data=~s/^\s+(\S.*)/$1/;
2556: $data=~s/(.*\S)\s+$/$1/;
2557: $data=~s/(\s)+/$1/;
2558: my ($current_length,$min_length)=(0,0);
2559: if ($data=~/\\vskip/) {
2560: my $newdata=$data;
2561: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2562: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2563: foreach my $elementdata (@newdata) {
2564: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2565: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2566: my @words=split(/ /,$elementdata);
2567: foreach my $word (@words) {
2568: my $lengthword=2.5*&LATEX_length($word);
2569: if ($min_length<$lengthword) {$min_length=$lengthword;}
2570: }
2571: }
2572: } else {
2573: $current_length=2.5*&LATEX_length($data);
2574: my @words=split(/ /,$data);
2575: foreach my $word (@words) {
2576: my $lengthword=2*&LATEX_length($word);
2577: if ($min_length<$lengthword) {$min_length=$lengthword;}
2578: }
2579: }
2580: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2581: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2582: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2583: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2584: }
2585: }
2586: # Substitute all of the tables nested in this cell in their appropriate places.
2587:
2588:
2589: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2590: for (my $in=0; $in<=$nested_count; $in++) {
2591: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2592: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2593: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2594: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2595:
2596: }
2597: # Should be be killing off the 'include' elements as they're used up?
2598:
2599: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2600:
2601:
2602:
2603:
2604: # the colspan array will indicate how many columns will be spanned by this
2605: # cell..this requires that counter_columns also be adjusted accordingly
2606: # so that the next bunch of text goes in the right cell. Note that since
2607: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2608: #
2609:
2610: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2611: for (my $i = 0; $i < ($colspan -1); $i++) {
2612: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2613: }
2614: for (my $r = 0; $r < $rowspan; $r++) {
2615: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2616: # Put empty text in spanned cols.
2617:
2618: }
2619:
2620:
2621:
2622: return '';
2623: }
2624:
2625: sub end_td {
2626: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2627: my $currentstring = '';
2628: if ($target eq 'web' || $target eq 'webgrade') {
2629: $currentstring = $token->[2];
2630: } elsif ($target eq 'tex') {
2631: $Apache::londefdef::TD_redirection =0;
2632: &end_td_tex($parstack,$parser,$safeeval);
2633: }
2634: return $currentstring;
2635: }
2636:
2637: #-- <th> tag (end tag optional)
2638: sub start_th {
2639: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2640: my $currentstring = '';
2641: if ($target eq 'web' || $target eq 'webgrade') {
2642: $currentstring = $token->[4];
2643: } elsif ($target eq 'tex') {
2644: $Apache::londefdef::TD_redirection = 1;
2645: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2646: }
2647: return $currentstring;
2648: }
2649:
2650: sub tagg_check {
2651: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2652: my @ar=@$parstack;
2653: for (my $i=$#ar-1;$i>=0;$i--) {
2654: if (lc($$tagstack[$i]) eq $good_tag) {
2655: &start_th_tex($parstack,$parser,$safeeval);
2656: last;
2657: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2658: splice @ar, $i+1;
2659: &end_th_tex(\@ar,$parser,$safeeval);
2660: &start_th_tex($parstack,$parser,$safeeval);
2661: last;
2662: }
2663: }
2664: return '';
2665: }
2666:
2667: sub start_th_tex {
2668: my ($parstack,$parser,$safeeval) = @_;
2669: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2670: if ($alignchar eq '') {
2671: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2672: }
2673: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2674: $Apache::londefdef::table[-1]{'counter_columns'}++;
2675: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2676: if (defined $TeXwidth) {
2677: my $current_length=&recalc($TeXwidth);
2678: $current_length=~/(\d+\.?\d*)/;
2679: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2680: }
2681: &Apache::lonxml::startredirection();
2682: return '';
2683: }
2684:
2685: sub end_th_tex {
2686: my ($parstack,$parser,$safeeval) = @_;
2687: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2688: my $data=&Apache::lonxml::endredirection();
2689: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2690: if (defined $TeXwidth) {
2691: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2692: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2693: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2694: } else {
2695: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2696: my $garbage_data=$data;
2697: my $fwidth=0;
2698: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2699: my $current_length=&recalc($1);
2700: $current_length=~/(\d+\.?\d*)/;
2701: if ($fwidth<$1) {$fwidth=$1;}
2702: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2703: }
2704: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2705: my $current_length=$1;
2706: if ($fwidth<$current_length) {$fwidth=$current_length;}
2707: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2708: }
2709: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2710: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2711: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2712: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2713: } else {
2714: $data=~s/^\s+(\S.*)/$1/;
2715: $data=~s/(.*\S)\s+$/$1/;
2716: $data=~s/(\s)+/$1/;
2717: my ($current_length,$min_length)=(0,0);
2718: if ($data=~/\\vskip/) {
2719: my $newdata=$data;
2720: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2721: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2722: foreach my $elementdata (@newdata) {
2723: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2724: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2725: my @words=split(/ /,$elementdata);
2726: foreach my $word (@words) {
2727: my $lengthword=2.5*&LATEX_length($word);
2728: if ($min_length<$lengthword) {$min_length=$lengthword;}
2729: }
2730: }
2731: } else {
2732: $current_length=2.5*&LATEX_length($data);
2733: my @words=split(/ /,$data);
2734: foreach my $word (@words) {
2735: my $lengthword=2*&LATEX_length($word);
2736: if ($min_length<$lengthword) {$min_length=$lengthword;}
2737: }
2738: }
2739: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2740: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2741: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2742: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2743: }
2744: }
2745: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2746: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2747: }
2748: #make data bold
2749: $data='\textbf{'.$data.'}';
2750: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2751: return'';
2752: }
2753:
2754: sub end_th {
2755: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2756: my $currentstring = &end_p(); # Close any open <p> in the row.
2757: if ($target eq 'web' || $target eq 'webgrade') {
2758: $currentstring .= $token->[2];
2759: } elsif ($target eq 'tex') {
2760: $Apache::londefdef::TD_redirection =0;
2761: &end_th_tex($parstack,$parser,$safeeval);
2762: }
2763: return $currentstring;
2764: }
2765:
2766: #-- <img> tag (end tag forbidden)
2767: #
2768: # Render the <IMG> tag.
2769: # <IMG> has the following attributes (in addition to the
2770: # standard HTML ones:
2771: # TeXwrap - Governs how the tex target will try to wrap text around
2772: # horizontally aligned images.
2773: # TeXwidth - The width of the image when rendered for print (mm).
2774: # TeXheight - The height of the image when rendered for print (mm)
2775: # (Note there seems to also be support for this as a % of page size)
2776: #
2777: sub start_img {
2778: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2779: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2780: undef,1);
2781: if (! $src &&
2782: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2783: ) {
2784: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2785: return '';
2786: }
2787: &Apache::lonxml::extlink($src);
2788: my $currentstring = '';
2789: my $scaling = .3;
2790:
2791: # Render unto browsers that which are the browser's...
2792:
2793: if ($target eq 'web' || $target eq 'webgrade') {
2794: if ($env{'browser.imagesuppress'} ne 'on') {
2795: my $enc = ('yes' eq
2796: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2797: $safeeval)));
2798: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2799: $enc);
2800: } else {
2801: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2802: undef,1);
2803: if (!$alttag) {
2804: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2805: $src);
2806: }
2807: $currentstring.='[IMAGE: '.$alttag.']';
2808: }
2809:
2810: # and render unto TeX that which is LaTeX
2811:
2812: } elsif ($target eq 'tex') {
2813: #
2814: # The alignment will require some superstructure to be put around
2815: # the \includegraphics stuff. At present we can only partially
2816: # simulate the alignments offered by html.
2817: #
2818: #
2819: my $align = lc(&Apache::lonxml::get_param('align',
2820: $parstack,
2821: $safeeval,
2822: undef,1));
2823: if(!$align) {
2824: $align = "bottom"; # This is html's default so it's ours too.
2825: }
2826: #
2827: &Apache::lonxml::debug("Alignemnt = $align");
2828: # LaTeX's image/text wrapping is really bad since it wants to
2829: # make figures float.
2830: # The user has the optional parameter (applicable only to l/r
2831: # alignment to use the picins/parpic directive to get wrapped text
2832: # this is also imperfect.. that's why we give them a choice...
2833: # so they can't yell at us for our choice.
2834: #
2835: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2836: $parstack,
2837: $safeeval,
2838: undef,0);
2839: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2840: if(!$latex_rendering) {
2841: $latex_rendering = "texwrap";
2842: }
2843: # using texwrap inside a table does not work. So, if after all of this,
2844: # texwrap is on, we turn it off if we detect we're in a table:
2845: #
2846: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2847: $latex_rendering = 'parpic';
2848: }
2849:
2850: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2851:
2852: #if original gif/jpg/png file exist do following:
2853: my $origsrc=$src;
2854: my ($path,$file) = &get_eps_image($src);
2855: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2856: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2857: &Apache::lonxml::debug("path = $path file = $file src = $src");
2858: if (-e $src) {
2859: &Apache::lonxml::debug("$src exists");
2860: my ($height_param,$width_param)=
2861: &image_size($origsrc,0.3,$parstack,$safeeval);
2862: my $size;
2863: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2864: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2865: # Default size if not able to extract that (e.g. eps image).
2866:
2867: # &Apache::lonnet::logthis("Size = $size");
2868:
2869: $size='['.$size;
2870: $size=~s/,$/]/;
2871: $currentstring .= '\graphicspath{{'.$path.'}}'
2872: .'\includegraphics'.$size.'{'.$file.'} ';
2873:
2874: # If there's an alignment specification we need to honor it here.
2875: # For the horizontal alignments, we will also honor the
2876: # value of the latex specfication. The default is parbox,
2877: # and that's used for illegal values too.
2878: #
2879: # Even though we set a default alignment value, the user
2880: # could have given us an illegal value. In that case we
2881: # just use the default alignment of bottom..
2882: if ($align eq "top") {
2883: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2884: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2885: my $offset = $height_param/2;
2886: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2887: } elsif ($align eq "left") {
2888: if ($latex_rendering eq "parpic") {
2889: $currentstring = '\parpic[l]{'.$currentstring.'}';
2890: } elsif ($latex_rendering eq "parbox") {
2891: $currentstring = '\begin{minipage}[l]{'.$width_param.'mm}'
2892: .$currentstring.'\end{minipage}';
2893: } elsif ($latex_rendering eq "wrapfigure"
2894: || $latexrendering ne 'none') { # wrapfig render
2895: $currentstring =
2896: '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2897: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2898: }
2899: } elsif ($align eq "right") {
2900: if ($latex_rendering eq "parpic") {
2901: $currentstring = '\parpic[r]{'.$currentstring.'}';
2902: } elsif ($latex_rendering eq "parbox") {
2903: $currentstring = '\begin{minipage}[r]{'.$width_param.'mm}'
2904: .$currentstring.'\end{minipage}';
2905: } elsif ($latex_rendering eq "wrapfigure"
2906: || $latexrendering ne 'none') { # wrapfig render
2907: $currentstring =
2908: '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2909: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2910: }
2911: } else { # Bottom is also default.
2912: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2913: }
2914: } else {
2915: &Apache::lonxml::debug("$src does not exist");
2916: #original image file doesn't exist so check the alt attribute
2917: my $alt =
2918: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2919: unless ($alt) {
2920: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2921: }
2922:
2923: if ($alt) { $currentstring .= ' '.$alt.' '; }
2924: }
2925:
2926: # And here's where the semi-quote breaks down: allow the user
2927: # to edit the beast as well by rendering the problem for edit:
2928: } elsif ($target eq 'edit') {
2929: $currentstring .=&Apache::edit::tag_start($target,$token);
2930: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2931: &Apache::edit::browse('src',undef,'alt').' '.
2932: &Apache::edit::search('src',undef,'alt').'<br />';
2933: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2934: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2935: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2936: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2937: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2938: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2939: ['','bottom','middle','top','left','right'],$token,5);
2940: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2941: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
2942: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2943: ['no','yes'], $token, 2);
2944: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2945: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2946: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2947: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2948: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2949:
2950:
2951: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2952: if ($width) { $currentstring.=' width="'.$width.'" '; }
2953: if ($height) { $currentstring.=' height="'.$height.'" '; }
2954: $currentstring .= ' />';
2955: } elsif ($target eq 'modified') {
2956: my ($osrc,$owidth,$oheight)=
2957: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2958: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2959: $safeeval,'src','alt','align',
2960: 'TeXwidth','TeXheight', 'TeXwrap',
2961: 'width','height','encrypturl');
2962: my ($nsrc,$nwidth,$nheight)=
2963: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2964: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2965: &image_replication($loc);
2966: my ($iwidth,$iheight);
2967: if (-e $loc) {
2968: my $image = Image::Magick->new;
2969: $image->Read($loc);
2970: ($iwidth, $iheight) = ($image->Get('width'),
2971: $image->Get('height'));
2972: }
2973: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2974: # changed image or no size specified,
2975: # if they didn't explicitly change the
2976: # width or height use the ones from the image
2977: if ($iwidth && $iheight) {
2978: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2979: $token->[2]{'width'} = $iwidth;$ctag=1;
2980: }
2981: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2982: $token->[2]{'height'}=$iheight;$ctag=1;
2983: }
2984: }
2985: }
2986: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2987: # if we don't have a width or height
2988: if ($iwidth && $cwidth && !$cheight) {
2989: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2990: }
2991: if ($iheight && $cheight && !$cwidth) {
2992: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2993: }
2994: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2995: }
2996:
2997: return $currentstring;
2998: }
2999:
3000: sub end_img {
3001: my ($target,$token) = @_;
3002: my $currentstring = '';
3003: if ($target eq 'web' || $target eq 'webgrade') {
3004: $currentstring = $token->[2];
3005: } elsif ($target eq 'tex') {
3006: $currentstring = '';
3007: }
3008: return $currentstring;
3009: }
3010:
3011: #-- <applet> tag (end tag required)
3012: sub start_applet {
3013: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3014:
3015: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3016: &Apache::lonxml::extlink($code);
3017: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3018: undef,1);
3019: &Apache::lonxml::extlink($archive);
3020: my $currentstring = '';
3021: if ($target eq 'web' || $target eq 'webgrade') {
3022: if ($env{'browser.appletsuppress'} ne 'on') {
3023: $currentstring = &Apache::lonenc::encrypt_ref($token,
3024: {'code'=>$code,
3025: 'archive'=>$archive}
3026: );
3027: } else {
3028: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3029: $safeeval,undef,1);
3030: unless ($alttag) {
3031: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3032: $code);
3033: }
3034: $currentstring='[APPLET: '.$alttag.']';
3035: }
3036: } elsif ($target eq 'tex') {
3037: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3038: $safeeval,undef,1);
3039: unless ($alttag) {
3040: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3041: undef,1);
3042: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3043: $code);
3044: }
3045: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3046: '.}\end{center}';
3047: }
3048: return $currentstring;
3049: }
3050:
3051: sub end_applet {
3052: my ($target,$token) = @_;
3053: my $currentstring = '';
3054: if ($target eq 'web' || $target eq 'webgrade') {
3055: $currentstring = $token->[2];
3056: } elsif ($target eq 'tex') {
3057: }
3058: return $currentstring;
3059: }
3060:
3061: #-- <embed> tag (end tag optional/required)
3062: sub start_embed {
3063: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3064: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3065: &Apache::lonxml::extlink($src);
3066: my $currentstring = '';
3067: if ($target eq 'web' || $target eq 'webgrade') {
3068: if ($env{'browser.embedsuppress'} ne 'on') {
3069: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3070: } else {
3071: my $alttag=&Apache::lonxml::get_param
3072: ('alt',$parstack,$safeeval,undef,1);
3073: unless ($alttag) {
3074: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3075: }
3076: $currentstring='[EMBED: '.$alttag.']';
3077: }
3078: } elsif ($target eq 'tex') {
3079: }
3080: return $currentstring;
3081: }
3082:
3083: sub end_embed {
3084: my ($target,$token) = @_;
3085: my $currentstring = '';
3086: if ($target eq 'web' || $target eq 'webgrade') {
3087: $currentstring = $token->[2];
3088: } elsif ($target eq 'tex') {
3089: }
3090: return $currentstring;
3091: }
3092:
3093: #-- <param> tag (end tag forbidden)
3094: sub start_param {
3095: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3096: if (&Apache::lonxml::get_param('name',$parstack,
3097: $safeeval,undef,1)=~/^cabbase$/i) {
3098: my $value=&Apache::lonxml::get_param('value',$parstack,
3099: $safeeval,undef,1);
3100: &Apache::lonxml::extlink($value);
3101: }
3102:
3103: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3104: &Apache::lonxml::extlink($src);
3105: my $currentstring = '';
3106: if ($target eq 'web' || $target eq 'webgrade') {
3107: my %toconvert;
3108: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3109: if ($src) { $toconvert{'src'}= $src; }
3110: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3111: undef,1);
3112: if ($name=~/^cabbase$/i) {
3113: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3114: $safeeval,undef,1);
3115: }
3116: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3117: } elsif ($target eq 'tex') {
3118: }
3119: return $currentstring;
3120: }
3121:
3122: sub end_param {
3123: my ($target,$token) = @_;
3124: my $currentstring = '';
3125: if ($target eq 'web' || $target eq 'webgrade') {
3126: $currentstring = $token->[2];
3127: } elsif ($target eq 'tex') {
3128: }
3129: return $currentstring;
3130: }
3131:
3132: #-- <allow> tag
3133: sub start_allow {
3134: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3135: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3136: &Apache::lonxml::extlink($src);
3137:
3138: if ($target eq 'tex') { &image_replication($src); }
3139: my $result;
3140: if ($target eq 'edit') {
3141: $result .=&Apache::edit::tag_start($target,$token);
3142: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3143: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3144: } elsif ($target eq 'modified') {
3145: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3146: $safeeval,'src');
3147: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3148: }
3149: return $result;
3150: }
3151:
3152: sub end_allow {
3153: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3154: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3155: return '';
3156: }
3157:
3158: #-- Frames (end tag required)
3159: #-- <frameset>
3160: sub start_frameset {
3161: my ($target,$token) = @_;
3162: my $currentstring = ''; # Close any pending para.
3163: if ($target eq 'web' || $target eq 'webgrade') {
3164: $currentstring =
3165: &Apache::loncommon::start_page($Apache::londefdef::title,
3166: $Apache::londefdef::head,
3167: {'add_entries' => $token->[2],
3168: 'no_title' => 1,
3169: 'force_register' => 1,
3170: 'frameset' => 1,});
3171:
3172: }
3173: return $currentstring;
3174: }
3175:
3176: sub end_frameset {
3177: my ($target,$token) = @_;
3178: my $currentstring = '';
3179: if ($target eq 'web' || $target eq 'webgrade') {
3180: $currentstring = $token->[2];
3181: }
3182: return $currentstring;
3183: }
3184:
3185: #-- <xmp> (end tag required)
3186: sub start_xmp {
3187: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3188: my $currentstring = '';
3189: if ($target eq 'web' || $target eq 'webgrade') {
3190: $currentstring .= $token->[4];
3191: } elsif ($target eq 'tex') {
3192: $currentstring .= '\begin{verbatim}';
3193: }
3194: return $currentstring;
3195: }
3196:
3197: sub end_xmp {
3198: my ($target,$token) = @_;
3199: my $currentstring = '';
3200: if ($target eq 'web' || $target eq 'webgrade') {
3201: $currentstring .= $token->[2];
3202: } elsif ($target eq 'tex') {
3203: $currentstring .= '\end{verbatim}';
3204: }
3205: return $currentstring;
3206: }
3207:
3208: #-- <pre> (end tag required)
3209: sub start_pre {
3210: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3211: my $currentstring = &end_p(); # close off pending <p>
3212: if ($target eq 'web' || $target eq 'webgrade') {
3213: $currentstring .= $token->[4];
3214: } elsif ($target eq 'tex') {
3215: $currentstring .= '\begin{verbatim}';
3216: &Apache::lonxml::disable_LaTeX_substitutions();
3217: }
3218: return $currentstring;
3219: }
3220:
3221: sub end_pre {
3222: my ($target,$token) = @_;
3223: my $currentstring = '';
3224: if ($target eq 'web' || $target eq 'webgrade') {
3225: $currentstring .= $token->[2];
3226: } elsif ($target eq 'tex') {
3227: $currentstring .= '\end{verbatim}';
3228: &Apache::lonxml::enable_LaTeX_substitutions();
3229: }
3230: return $currentstring;
3231: }
3232:
3233: #-- <insert>
3234: sub start_insert {
3235: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3236: my $currentstring = '';
3237: if ($target eq 'web' || $target eq 'webgrade') {
3238: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3239: $currentstring .= '<b>'.$display.'</b>';;
3240: }
3241: return $currentstring;
3242: }
3243:
3244: sub end_insert {
3245: my ($target,$token) = @_;
3246: my $currentstring = '';
3247: if ($target eq 'web' || $target eq 'webgrade') {
3248: $currentstring .= '';
3249: }
3250: return $currentstring;
3251: }
3252:
3253: #-- <externallink>
3254: sub start_externallink {
3255: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3256: my $currentstring = '';
3257: if ($target eq 'web' || $target eq 'webgrade') {
3258: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3259: $currentstring .= '<b>'.$display.'</b>';;
3260: }
3261: return $currentstring;
3262: }
3263:
3264: sub end_externallink {
3265: my ($target,$token) = @_;
3266: my $currentstring = '';
3267: if ($target eq 'web' || $target eq 'webgrade') {
3268: $currentstring .= '';
3269: }
3270: return $currentstring;
3271: }
3272:
3273: #-- <blankspace heigth="">
3274: sub start_blankspace {
3275: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3276: my $currentstring = &end_p(); # closes off any unclosed <p>
3277: if ($target eq 'tex') {
3278: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3279: $currentstring .= '\vskip '.$howmuch.' ';
3280: }
3281: return $currentstring;
3282: }
3283:
3284: sub end_blankspace {
3285: my ($target,$token) = @_;
3286: my $currentstring = '';
3287: if ($target eq 'tex') {
3288: $currentstring .= '';
3289: }
3290: return $currentstring;
3291: }
3292:
3293: #-- <abbr> tag (end tag required)
3294: sub start_abbr {
3295: my ($target,$token) = @_;
3296: my $currentstring = '';
3297: if ($target eq 'web' || $target eq 'webgrade') {
3298: $currentstring = $token->[4];
3299: }
3300: return $currentstring;
3301: }
3302:
3303: sub end_abbr {
3304: my ($target,$token) = @_;
3305: my $currentstring = '';
3306: if ($target eq 'web' || $target eq 'webgrade') {
3307: $currentstring = $token->[2];
3308: }
3309: return $currentstring;
3310: }
3311:
3312: #-- <acronym> tag (end tag required)
3313: sub start_acronym {
3314: my ($target,$token) = @_;
3315: my $currentstring = '';
3316: if ($target eq 'web' || $target eq 'webgrade') {
3317: $currentstring = $token->[4];
3318: }
3319: return $currentstring;
3320: }
3321:
3322: sub end_acronym {
3323: my ($target,$token) = @_;
3324: my $currentstring = '';
3325: if ($target eq 'web' || $target eq 'webgrade') {
3326: $currentstring = $token->[2];
3327: }
3328: return $currentstring;
3329: }
3330:
3331: #-- <area> tag (end tag forbidden)
3332: sub start_area {
3333: my ($target,$token) = @_;
3334: my $currentstring = '';
3335: if ($target eq 'web' || $target eq 'webgrade') {
3336: $currentstring = $token->[4];
3337: }
3338: return $currentstring;
3339: }
3340:
3341: sub end_area {
3342: my ($target,$token) = @_;
3343: my $currentstring = '';
3344: if ($target eq 'web' || $target eq 'webgrade') {
3345: $currentstring = $token->[2];
3346: }
3347: return $currentstring;
3348: }
3349:
3350: #-- <base> tag (end tag forbidden)
3351: sub start_base {
3352: my ($target,$token) = @_;
3353: my $currentstring = '';
3354: if ($target eq 'web' || $target eq 'webgrade') {
3355: $currentstring = $token->[4];
3356: }
3357: return $currentstring;
3358: }
3359:
3360: sub end_base {
3361: my ($target,$token) = @_;
3362: my $currentstring = '';
3363: if ($target eq 'web' || $target eq 'webgrade') {
3364: $currentstring = $token->[2];
3365: }
3366: return $currentstring;
3367: }
3368:
3369: #-- <bdo> tag (end tag required)
3370: sub start_bdo {
3371: my ($target,$token) = @_;
3372: my $currentstring = '';
3373: if ($target eq 'web' || $target eq 'webgrade') {
3374: $currentstring = $token->[4];
3375: }
3376: return $currentstring;
3377: }
3378:
3379: sub end_bdo {
3380: my ($target,$token) = @_;
3381: my $currentstring = '';
3382: if ($target eq 'web' || $target eq 'webgrade') {
3383: $currentstring = $token->[2];
3384: }
3385: return $currentstring;
3386: }
3387:
3388: #-- <bgsound> tag (end tag optional)
3389: sub start_bgsound {
3390: my ($target,$token) = @_;
3391: my $currentstring = '';
3392: if ($target eq 'web' || $target eq 'webgrade') {
3393: $currentstring = $token->[4];
3394: }
3395: return $currentstring;
3396: }
3397:
3398: sub end_bgsound {
3399: my ($target,$token) = @_;
3400: my $currentstring = '';
3401: if ($target eq 'web' || $target eq 'webgrade') {
3402: $currentstring = $token->[2];
3403: }
3404: return $currentstring;
3405: }
3406:
3407: #-- <blink> tag (end tag required)
3408: sub start_blink {
3409: my ($target,$token) = @_;
3410: my $currentstring = '';
3411: if ($target eq 'web' || $target eq 'webgrade') {
3412: $currentstring = $token->[4];
3413: }
3414: return $currentstring;
3415: }
3416:
3417: sub end_blink {
3418: my ($target,$token) = @_;
3419: my $currentstring = '';
3420: if ($target eq 'web' || $target eq 'webgrade') {
3421: $currentstring = $token->[2];
3422: }
3423: return $currentstring;
3424: }
3425:
3426: #-- <blockquote> tag (end tag required)
3427: sub start_blockquote {
3428: my ($target,$token) = @_;
3429: my $currentstring = &end_p(); # Close any unclosed <p>
3430: if ($target eq 'web' || $target eq 'webgrade') {
3431: $currentstring .= $token->[4];
3432: }
3433: if ($target eq 'tex') {
3434: $currentstring .= '\begin{quote}';
3435: }
3436: return $currentstring;
3437: }
3438:
3439: sub end_blockquote {
3440: my ($target,$token) = @_;
3441: my $currentstring = '';
3442: if ($target eq 'web' || $target eq 'webgrade') {
3443: $currentstring = $token->[2];
3444: }
3445: if ($target eq 'tex') {
3446: $currentstring = '\end{quote}';
3447: }
3448: return $currentstring;
3449: }
3450:
3451: #-- <button> tag (end tag required)
3452: sub start_button {
3453: my ($target,$token) = @_;
3454: my $currentstring = '';
3455: if ($target eq 'web' || $target eq 'webgrade') {
3456: $currentstring = $token->[4];
3457: }
3458: return $currentstring;
3459: }
3460:
3461: sub end_button {
3462: my ($target,$token) = @_;
3463: my $currentstring = '';
3464: if ($target eq 'web' || $target eq 'webgrade') {
3465: $currentstring = $token->[2];
3466: }
3467: return $currentstring;
3468: }
3469:
3470: #-- <caption> tag (end tag required)
3471: sub start_caption {
3472: my ($target,$token) = @_;
3473: my $currentstring = '';
3474: if ($target eq 'web' || $target eq 'webgrade') {
3475: $currentstring = $token->[4];
3476: }
3477: return $currentstring;
3478: }
3479:
3480: sub end_caption {
3481: my ($target,$token) = @_;
3482: my $currentstring = '';
3483: if ($target eq 'web' || $target eq 'webgrade') {
3484: $currentstring = $token->[2];
3485: }
3486: return $currentstring;
3487: }
3488:
3489: #-- <col> tag (end tag forbdden)
3490: sub start_col {
3491: my ($target,$token) = @_;
3492: my $currentstring = '';
3493: if ($target eq 'web' || $target eq 'webgrade') {
3494: $currentstring = $token->[4];
3495: }
3496: return $currentstring;
3497: }
3498:
3499: sub end_col {
3500: my ($target,$token) = @_;
3501: my $currentstring = '';
3502: if ($target eq 'web' || $target eq 'webgrade') {
3503: $currentstring = $token->[2];
3504: }
3505: return $currentstring;
3506: }
3507:
3508: #-- <colgroup> tag (end tag optional)
3509: sub start_colgroup {
3510: my ($target,$token) = @_;
3511: my $currentstring = '';
3512: if ($target eq 'web' || $target eq 'webgrade') {
3513: $currentstring = $token->[4];
3514: }
3515: return $currentstring;
3516: }
3517:
3518: sub end_colgroup {
3519: my ($target,$token) = @_;
3520: my $currentstring = '';
3521: if ($target eq 'web' || $target eq 'webgrade') {
3522: $currentstring = $token->[2];
3523: }
3524: return $currentstring;
3525: }
3526:
3527: #-- <del> tag (end tag required)
3528: sub start_del {
3529: my ($target,$token) = @_;
3530: my $currentstring = '';
3531: if ($target eq 'web' || $target eq 'webgrade') {
3532: $currentstring = $token->[4];
3533: }
3534: return $currentstring;
3535: }
3536:
3537: sub end_del {
3538: my ($target,$token) = @_;
3539: my $currentstring = '';
3540: if ($target eq 'web' || $target eq 'webgrade') {
3541: $currentstring = $token->[2];
3542: }
3543: return $currentstring;
3544: }
3545:
3546: #-- <fieldset> tag (end tag required)
3547: sub start_fieldset {
3548: my ($target,$token) = @_;
3549: my $currentstring = '';
3550: if ($target eq 'web' || $target eq 'webgrade') {
3551: $currentstring = $token->[4];
3552: }
3553: return $currentstring;
3554: }
3555:
3556: sub end_fieldset {
3557: my ($target,$token) = @_;
3558: my $currentstring = '';
3559: if ($target eq 'web' || $target eq 'webgrade') {
3560: $currentstring = $token->[2];
3561: }
3562: return $currentstring;
3563: }
3564:
3565: #-- <frame> tag (end tag forbidden)
3566: sub start_frame {
3567: my ($target,$token) = @_;
3568: my $currentstring = '';
3569: if ($target eq 'web' || $target eq 'webgrade') {
3570: $currentstring = $token->[4];
3571: }
3572: return $currentstring;
3573: }
3574:
3575: sub end_frame {
3576: my ($target,$token) = @_;
3577: my $currentstring = '';
3578: if ($target eq 'web' || $target eq 'webgrade') {
3579: $currentstring = $token->[2];
3580: }
3581: return $currentstring;
3582: }
3583:
3584: #-- <iframe> tag (end tag required)
3585: sub start_iframe {
3586: my ($target,$token) = @_;
3587: my $currentstring = '';
3588: if ($target eq 'web' || $target eq 'webgrade') {
3589: $currentstring = $token->[4];
3590: }
3591: return $currentstring;
3592: }
3593:
3594: sub end_iframe {
3595: my ($target,$token) = @_;
3596: my $currentstring = '';
3597: if ($target eq 'web' || $target eq 'webgrade') {
3598: $currentstring = $token->[2];
3599: }
3600: return $currentstring;
3601: }
3602:
3603: #-- <ins> tag (end tag required)
3604: sub start_ins {
3605: my ($target,$token) = @_;
3606: my $currentstring = '';
3607: if ($target eq 'web' || $target eq 'webgrade') {
3608: $currentstring = $token->[4];
3609: }
3610: return $currentstring;
3611: }
3612:
3613: sub end_ins {
3614: my ($target,$token) = @_;
3615: my $currentstring = '';
3616: if ($target eq 'web' || $target eq 'webgrade') {
3617: $currentstring = $token->[2];
3618: }
3619: return $currentstring;
3620: }
3621:
3622: #-- <isindex> tag (end tag forbidden)
3623: sub start_isindex {
3624: my ($target,$token) = @_;
3625: my $currentstring = '';
3626: if ($target eq 'web' || $target eq 'webgrade') {
3627: $currentstring = $token->[4];
3628: }
3629: return $currentstring;
3630: }
3631:
3632: sub end_isindex {
3633: my ($target,$token) = @_;
3634: my $currentstring = '';
3635: if ($target eq 'web' || $target eq 'webgrade') {
3636: $currentstring = $token->[2];
3637: }
3638: return $currentstring;
3639: }
3640:
3641: #-- <keygen> tag (end tag forbidden)
3642: sub start_keygen {
3643: my ($target,$token) = @_;
3644: my $currentstring = '';
3645: if ($target eq 'web' || $target eq 'webgrade') {
3646: $currentstring = $token->[4];
3647: }
3648: return $currentstring;
3649: }
3650:
3651: sub end_keygen {
3652: my ($target,$token) = @_;
3653: my $currentstring = '';
3654: if ($target eq 'web' || $target eq 'webgrade') {
3655: $currentstring = $token->[2];
3656: }
3657: return $currentstring;
3658: }
3659:
3660: #-- <label> tag
3661: sub start_label {
3662: my ($target,$token) = @_;
3663: my $currentstring = '';
3664: if ($target eq 'web' || $target eq 'webgrade') {
3665: $currentstring = $token->[4];
3666: }
3667: return $currentstring;
3668: }
3669:
3670: sub end_label {
3671: my ($target,$token) = @_;
3672: my $currentstring = '';
3673: if ($target eq 'web' || $target eq 'webgrade') {
3674: $currentstring = $token->[2];
3675: }
3676: return $currentstring;
3677: }
3678:
3679: #-- <layer> tag (end tag required)
3680: sub start_layer {
3681: my ($target,$token) = @_;
3682: my $currentstring = '';
3683: if ($target eq 'web' || $target eq 'webgrade') {
3684: $currentstring = $token->[4];
3685: }
3686: return $currentstring;
3687: }
3688:
3689: sub end_layer {
3690: my ($target,$token) = @_;
3691: my $currentstring = '';
3692: if ($target eq 'web' || $target eq 'webgrade') {
3693: $currentstring = $token->[2];
3694: }
3695: return $currentstring;
3696: }
3697:
3698: #-- <legend> tag (end tag required)
3699: sub start_legend {
3700: my ($target,$token) = @_;
3701: my $currentstring = '';
3702: if ($target eq 'web' || $target eq 'webgrade') {
3703: $currentstring = $token->[4];
3704: }
3705: return $currentstring;
3706: }
3707:
3708: sub end_legend {
3709: my ($target,$token) = @_;
3710: my $currentstring = '';
3711: if ($target eq 'web' || $target eq 'webgrade') {
3712: $currentstring = $token->[2];
3713: }
3714: return $currentstring;
3715: }
3716:
3717: #-- <link> tag (end tag forbidden)
3718: sub start_link {
3719: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3720: my $currentstring = '';
3721: if ($target eq 'web' || $target eq 'webgrade') {
3722: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3723: undef,1);
3724: &Apache::lonxml::extlink($href);
3725: $currentstring = $token->[4];
3726: }
3727: return $currentstring;
3728: }
3729:
3730: sub end_link {
3731: my ($target,$token) = @_;
3732: my $currentstring = '';
3733: if ($target eq 'web' || $target eq 'webgrade') {
3734: $currentstring = $token->[2];
3735: }
3736: return $currentstring;
3737: }
3738:
3739: #-- <marquee> tag (end tag optional)
3740: sub start_marquee {
3741: my ($target,$token) = @_;
3742: my $currentstring = '';
3743: if ($target eq 'web' || $target eq 'webgrade') {
3744: $currentstring = $token->[4];
3745: }
3746: return $currentstring;
3747: }
3748:
3749: sub end_marquee {
3750: my ($target,$token) = @_;
3751: my $currentstring = '';
3752: if ($target eq 'web' || $target eq 'webgrade') {
3753: $currentstring = $token->[2];
3754: }
3755: return $currentstring;
3756: }
3757:
3758: #-- <multicol> tag (end tag required)
3759: sub start_multicol {
3760: my ($target,$token) = @_;
3761: my $currentstring = &end_p(); # Close any pending <p>
3762: if ($target eq 'web' || $target eq 'webgrade') {
3763: $currentstring .= $token->[4];
3764: }
3765: return $currentstring;
3766: }
3767:
3768: sub end_multicol {
3769: my ($target,$token) = @_;
3770: my $currentstring = '';
3771: if ($target eq 'web' || $target eq 'webgrade') {
3772: $currentstring = $token->[2];
3773: }
3774: return $currentstring;
3775: }
3776:
3777: #-- <nobr> tag (end tag required)
3778: sub start_nobr {
3779: my ($target,$token) = @_;
3780: my $currentstring = '';
3781: if ($target eq 'web' || $target eq 'webgrade') {
3782: $currentstring = $token->[4];
3783: } elsif ($target eq 'tex') {
3784: $currentstring='\mbox{';
3785: }
3786: return $currentstring;
3787: }
3788:
3789: sub end_nobr {
3790: my ($target,$token) = @_;
3791: my $currentstring = '';
3792: if ($target eq 'web' || $target eq 'webgrade') {
3793: $currentstring = $token->[2];
3794: } elsif ($target eq 'tex') {
3795: $currentstring='}';
3796: }
3797: return $currentstring;
3798: }
3799:
3800: #-- <noembed> tag (end tag required)
3801: sub start_noembed {
3802: my ($target,$token) = @_;
3803: my $currentstring = '';
3804: if ($target eq 'web' || $target eq 'webgrade') {
3805: $currentstring = $token->[4];
3806: }
3807: return $currentstring;
3808: }
3809:
3810: sub end_noembed {
3811: my ($target,$token) = @_;
3812: my $currentstring = '';
3813: if ($target eq 'web' || $target eq 'webgrade') {
3814: $currentstring = $token->[2];
3815: }
3816: return $currentstring;
3817: }
3818:
3819: #-- <noframes> tag (end tag required)
3820: sub start_noframes {
3821: my ($target,$token) = @_;
3822: my $currentstring = '';
3823: if ($target eq 'web' || $target eq 'webgrade') {
3824: $currentstring = $token->[4];
3825: }
3826: return $currentstring;
3827: }
3828:
3829: sub end_noframes {
3830: my ($target,$token) = @_;
3831: my $currentstring = '';
3832: if ($target eq 'web' || $target eq 'webgrade') {
3833: $currentstring = $token->[2];
3834: }
3835: return $currentstring;
3836: }
3837:
3838: #-- <nolayer> tag (end tag required)
3839: sub start_nolayer {
3840: my ($target,$token) = @_;
3841: my $currentstring = '';
3842: if ($target eq 'web' || $target eq 'webgrade') {
3843: $currentstring = $token->[4];
3844: }
3845: return $currentstring;
3846: }
3847:
3848: sub end_nolayer {
3849: my ($target,$token) = @_;
3850: my $currentstring = '';
3851: if ($target eq 'web' || $target eq 'webgrade') {
3852: $currentstring = $token->[2];
3853: }
3854: return $currentstring;
3855: }
3856:
3857: #-- <noscript> tag (end tag required)
3858: sub start_noscript {
3859: my ($target,$token) = @_;
3860: my $currentstring = '';
3861: if ($target eq 'web' || $target eq 'webgrade') {
3862: $currentstring = $token->[4];
3863: }
3864: return $currentstring;
3865: }
3866:
3867: sub end_noscript {
3868: my ($target,$token) = @_;
3869: my $currentstring = '';
3870: if ($target eq 'web' || $target eq 'webgrade') {
3871: $currentstring = $token->[2];
3872: }
3873: return $currentstring;
3874: }
3875:
3876: #-- <object> tag (end tag required)
3877: sub start_object {
3878: my ($target,$token) = @_;
3879: my $currentstring = '';
3880: if ($target eq 'web' || $target eq 'webgrade') {
3881: $currentstring = $token->[4];
3882: }
3883: return $currentstring;
3884: }
3885:
3886: sub end_object {
3887: my ($target,$token) = @_;
3888: my $currentstring = '';
3889: if ($target eq 'web' || $target eq 'webgrade') {
3890: $currentstring = $token->[2];
3891: }
3892: return $currentstring;
3893: }
3894:
3895: #-- <optgroup> tag (end tag required)
3896: sub start_optgroup {
3897: my ($target,$token) = @_;
3898: my $currentstring = '';
3899: if ($target eq 'web' || $target eq 'webgrade') {
3900: $currentstring = $token->[4];
3901: }
3902: return $currentstring;
3903: }
3904:
3905: sub end_optgroup {
3906: my ($target,$token) = @_;
3907: my $currentstring = '';
3908: if ($target eq 'web' || $target eq 'webgrade') {
3909: $currentstring = $token->[2];
3910: }
3911: return $currentstring;
3912: }
3913:
3914: #-- <samp> tag (end tag required)
3915: sub start_samp {
3916: my ($target,$token) = @_;
3917: my $currentstring = '';
3918: if ($target eq 'web' || $target eq 'webgrade') {
3919: $currentstring = $token->[4];
3920: } elsif ($target eq 'tex') {
3921: $currentstring='\texttt{';
3922: }
3923: return $currentstring;
3924: }
3925:
3926: sub end_samp {
3927: my ($target,$token) = @_;
3928: my $currentstring = '';
3929: if ($target eq 'web' || $target eq 'webgrade') {
3930: $currentstring = $token->[2];
3931: } elsif ($target eq 'tex') {
3932: $currentstring='}';
3933: }
3934: return $currentstring;
3935: }
3936:
3937: #-- <server> tag
3938: sub start_server {
3939: my ($target,$token) = @_;
3940: my $currentstring = '';
3941: if ($target eq 'web' || $target eq 'webgrade') {
3942: $currentstring = $token->[4];
3943: }
3944: return $currentstring;
3945: }
3946:
3947: sub end_server {
3948: my ($target,$token) = @_;
3949: my $currentstring = '';
3950: if ($target eq 'web' || $target eq 'webgrade') {
3951: $currentstring = $token->[2];
3952: }
3953: return $currentstring;
3954: }
3955:
3956: #-- <spacer> tag (end tag forbidden)
3957: sub start_spacer {
3958: my ($target,$token) = @_;
3959: my $currentstring = &end_p(); # Close off any open <p> tag.
3960: if ($target eq 'web' || $target eq 'webgrade') {
3961: $currentstring .= $token->[4];
3962: }
3963: return $currentstring;
3964: }
3965:
3966: sub end_spacer {
3967: my ($target,$token) = @_;
3968: my $currentstring = '';
3969: if ($target eq 'web' || $target eq 'webgrade') {
3970: $currentstring = $token->[2];
3971: }
3972: return $currentstring;
3973: }
3974:
3975: #-- <span> tag (end tag required)
3976: sub start_span {
3977: my ($target,$token) = @_;
3978: my $currentstring = '';
3979: if ($target eq 'web' || $target eq 'webgrade') {
3980: $currentstring = $token->[4];
3981: }
3982: return $currentstring;
3983: }
3984:
3985: sub end_span {
3986: my ($target,$token) = @_;
3987: my $currentstring = '';
3988: if ($target eq 'web' || $target eq 'webgrade') {
3989: $currentstring = $token->[2];
3990: }
3991: return $currentstring;
3992: }
3993:
3994: #-- <tbody> tag (end tag optional)
3995: sub start_tbody {
3996: my ($target,$token) = @_;
3997: my $currentstring = '';
3998: if ($target eq 'web' || $target eq 'webgrade') {
3999: $currentstring = $token->[4];
4000: }
4001: return $currentstring;
4002: }
4003:
4004: sub end_tbody {
4005: my ($target,$token) = @_;
4006: my $currentstring = '';
4007: if ($target eq 'web' || $target eq 'webgrade') {
4008: $currentstring = $token->[2];
4009: }
4010: return $currentstring;
4011: }
4012:
4013: #-- <tfoot> tag (end tag optional)
4014: sub start_tfoot {
4015: my ($target,$token) = @_;
4016: my $currentstring = '';
4017: if ($target eq 'web' || $target eq 'webgrade') {
4018: $currentstring = $token->[4];
4019: }
4020: return $currentstring;
4021: }
4022:
4023: sub end_tfoot {
4024: my ($target,$token) = @_;
4025: my $currentstring = '';
4026: if ($target eq 'web' || $target eq 'webgrade') {
4027: $currentstring = $token->[2];
4028: }
4029: return $currentstring;
4030: }
4031:
4032: #-- <thead> tag (end tag optional)
4033: sub start_thead {
4034: my ($target,$token) = @_;
4035: my $currentstring = '';
4036: if ($target eq 'web' || $target eq 'webgrade') {
4037: $currentstring = $token->[4];
4038: }
4039: return $currentstring;
4040: }
4041:
4042: sub end_thead {
4043: my ($target,$token) = @_;
4044: my $currentstring = '';
4045: if ($target eq 'web' || $target eq 'webgrade') {
4046: $currentstring = $token->[2];
4047: }
4048: return $currentstring;
4049: }
4050:
4051: #-- <var> tag
4052: sub start_var {
4053: my ($target,$token) = @_;
4054: my $currentstring = '';
4055: if ($target eq 'web' || $target eq 'webgrade') {
4056: $currentstring = $token->[4];
4057: } elsif ($target eq 'tex') {
4058: $currentstring = '\textit{';
4059: }
4060: return $currentstring;
4061: }
4062:
4063: sub end_var {
4064: my ($target,$token) = @_;
4065: my $currentstring = '';
4066: if ($target eq 'web' || $target eq 'webgrade') {
4067: $currentstring = $token->[2];
4068: } elsif ($target eq 'tex') {
4069: $currentstring = '}';
4070: }
4071: return $currentstring;
4072: }
4073:
4074: #-- <wbr> tag (end tag forbidden)
4075: sub start_wbr {
4076: my ($target,$token) = @_;
4077: my $currentstring = '';
4078: if ($target eq 'web' || $target eq 'webgrade') {
4079: $currentstring = $token->[4];
4080: }
4081: return $currentstring;
4082: }
4083:
4084: sub end_wbr {
4085: my ($target,$token) = @_;
4086: my $currentstring = '';
4087: if ($target eq 'web' || $target eq 'webgrade') {
4088: $currentstring = $token->[2];
4089: }
4090: return $currentstring;
4091: }
4092:
4093: #-- <hideweboutput> tag
4094: sub start_hideweboutput {
4095: my ($target,$token) = @_;
4096: if ($target eq 'web' || $target eq 'webgrade') {
4097: &Apache::lonxml::startredirection();
4098: }
4099: return '';
4100: }
4101:
4102: sub end_hideweboutput {
4103: my ($target,$token) = @_;
4104: my $currentstring = '';
4105: if ($target eq 'web' || $target eq 'webgrade') {
4106: $currentstring = &Apache::lonxml::endredirection();
4107: }
4108: return '';
4109: }
4110:
4111:
4112: sub image_replication {
4113: my $src = shift;
4114: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4115: #replicates eps or ps
4116: my $epssrc = my $pssrc = $src;
4117: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4118: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4119: if (not -e $epssrc && not -e $pssrc) {
4120: my $result=&Apache::lonnet::repcopy($epssrc);
4121: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4122: }
4123: return '';
4124: }
4125: #
4126: # Get correct sizing parameter for an image given
4127: # it's initial ht. and wid. This allows sizing of
4128: # images that are generated on-the-fly (e.g. gnuplot)
4129: # as well as serving as a utility for image_size.
4130: #
4131: # Parameter:
4132: # height_param
4133: # width_param - Initial picture dimensions.
4134: # scaling - A scale factor.
4135: # parstack, - the current stack of tag attributes
4136: # from the xml parser
4137: # safeeval, - pointer to the safespace
4138: # depth, - from what level in the stack to look for attributes
4139: # (assumes -1 if unspecified)
4140: # cis - look for attrubutes case insensitively
4141: # (assumes false)
4142: #
4143: # Returns:
4144: # height, width - new dimensions.
4145: #
4146: sub resize_image {
4147: my ($height_param, $width_param, $scaling,
4148: $parstack, $safeeval, $depth, $cis) = @_;
4149:
4150: # First apply the scaling...
4151:
4152: $height_param = $height_param * $scaling;
4153: $width_param = $width_param * $scaling;
4154:
4155: #do we have any specified LaTeX size of the picture?
4156: my $toget='TeXwidth';
4157: if ($cis) {
4158: $toget=lc($toget);
4159: }
4160: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4161: $safeeval,$depth,$cis);
4162: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4163: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4164: $safeeval,$depth,$cis);
4165: #do we have any specified web size of the picture?
4166: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4167: $depth,1);
4168: if ($TeXwidth) {
4169: my $old_width_param=$width_param;
4170: if ($TeXwidth=~/(\d+)\s*\%/) {
4171: $width_param = $1*$env{'form.textwidth'}/100;
4172: } else {
4173: $width_param = $TeXwidth;
4174: }
4175: if ($TeXheight) {
4176: $height_param = $TeXheight;
4177: } elsif ($old_width_param) {
4178: $height_param=$TeXwidth/$old_width_param*$height_param;
4179: }
4180: } elsif ($TeXheight) {
4181: $height_param = $TeXheight;
4182: if ($height_param) {
4183: $width_param = $TeXheight/$height_param*$width_param;
4184: }
4185: } elsif ($width) {
4186: my $old_width_param=$width_param;
4187: $width_param = $width*$scaling;
4188: if ($old_width_param) {
4189: $height_param=$width_param/$old_width_param*$height_param;
4190: }
4191: }
4192: if ($width_param > $env{'form.textwidth'}) {
4193: my $old_width_param=$width_param;
4194: $width_param =0.95*$env{'form.textwidth'};
4195: if ($old_width_param) {
4196: $height_param=$width_param/$old_width_param*$height_param;
4197: }
4198: }
4199:
4200: return ($height_param, $width_param);
4201: }
4202:
4203: sub image_size {
4204: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4205:
4206: #size of image from gif/jpg/jpeg/png
4207: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4208: if (-e $ressrc) {
4209: $src = $ressrc;
4210: }
4211: my $image = Image::Magick->new;
4212: my $current_figure = $image->Read($src);
4213: my $width_param = $image->Get('width');
4214: my $height_param = $image->Get('height');
4215: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4216: undef($image);
4217:
4218: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4219: $scaling, $parstack, $safeeval,
4220: $depth, $cis);
4221:
4222: return ($height_param, $width_param);
4223: }
4224:
4225: sub image_width {
4226: my ($height, $width) = &image_size(@_);
4227: return $width;
4228: }
4229: # Not yet 100% sure this is correct in all circumstances..
4230: # due to my uncertainty about mods to image_size.
4231: #
4232: sub image_height {
4233: my ($height, $width) = &image_size(@_);
4234: return $height;
4235: }
4236:
4237: sub get_eps_image {
4238: my ($src)=@_;
4239: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4240:
4241: # In order to prevent the substitution of the alt text, we need to
4242: # be sure the orig_src file is on system now so:
4243:
4244: if (! -e $orig_src) {
4245: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4246: }
4247: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4248: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4249: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4250: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4251: &Apache::lonxml::debug("Filelocation gives: $src");
4252: if (! -e $src) {
4253: &Apache::lonxml::debug("$src does not exist");
4254: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4255: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4256: #if replication failed try to find ps file
4257: $src=~s/\.eps$/\.ps/;
4258: &Apache::lonxml::debug("Now looking for $src");
4259: #if no ps file try to replicate it.
4260: my $didrepcopy = &Apache::lonnet::repcopy($src);
4261: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4262: if ( (not -e $src) ||
4263: ($didrepcopy ne 'ok')) {
4264: &Apache::lonxml::debug("Failed to find or replicate $src");
4265:
4266: #if replication failed try to produce eps file dynamically
4267: $src=~s/\.ps$/\.eps/;
4268: my $temp_file;
4269: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4270: my $newsrc=$orig_src;
4271: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4272: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4273: print FILE ("$newsrc\n");
4274: close(FILE);
4275: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4276: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4277: if ($sext ne "") { # Put the ext. back in to uniquify.
4278: $src =~ s/\.eps$/$sext.eps/;
4279: }
4280:
4281: }
4282:
4283: }
4284: } else {
4285: # If the postscript file has spaces in its name,
4286: # LaTeX will gratuitiously vomit. Therefore
4287: # queue such files for copy with " " replaced by "_".
4288: # printout.pm will know them by their .ps or .eps extensions.
4289: my $newsrc = $orig_src;
4290: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4291: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4292: print FILE "$src\n";
4293: close FILE;
4294: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4295: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4296: }
4297: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4298: $path =~ s/ /\_/g;
4299: $file =~ s/ /\_/g;
4300: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4301: return ($path.'/',$file);
4302: }
4303:
4304: sub eps_generation {
4305: my ($src,$file,$width_param) = @_;
4306: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4307: my $temp_file = Apache::File->new('>>'.$filename);
4308: print $temp_file "$src\n";
4309: my $newsrc = $src;
4310: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4311: $newsrc=~s{/home/httpd/html/res}{};
4312: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4313: $newsrc=~s{/\./}{/};
4314: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4315: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4316: $newsrc=~s{/home/httpd/lonUsers}{};
4317: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4318: }
4319: if ($newsrc=~m{/userfiles/}) {
4320: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4321: } else {
4322: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4323: }
4324: }
4325:
4326: sub file_path {
4327: my $src=shift;
4328: my ($file,$path);
4329: if ($src =~ m!(.*)/([^/]*)$!) {
4330: $file = $2;
4331: $path = $1.'/';
4332: }
4333: return $file,$path;
4334: }
4335: # Converts a measurement in to mm from any of
4336: # the other valid LaTeX units of measure.
4337: # If the units of measure are missing from the
4338: # parameter, it is assumed to be in and returned
4339: # with mm units of measure
4340: sub recalc {
4341: my $argument = shift;
4342: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4343: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4344: my $value=$1;
4345: my $units=$2;
4346: if ($units eq 'cm') {
4347: $value*=10;
4348: } elsif ($units eq 'in') {
4349: $value*=25.4;
4350: } elsif ($units eq 'pc') {
4351: $value*=(25.4*12/72.27);
4352: } elsif ($units eq 'pt') {
4353: $value*=(25.4/72.27);
4354: }
4355: return $value.' mm';
4356: }
4357:
4358: sub LATEX_length {
4359: my $garbage=shift;
4360: $garbage=~s/^\s+$//;
4361: $garbage=~s/^\s+(\S.*)/$1/;#space before
4362: $garbage=~s/(.*\S)\s+$/$1/;#space after
4363: $garbage=~s/(\s)+/$1/;#only one space
4364: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4365: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4366: $garbage=~s/([^\\])\$/$1/g;#$
4367: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4368: $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;
4369: $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;
4370: $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;
4371: $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;
4372: $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;
4373: $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;
4374: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4375: #remove some other LaTeX command
4376: $garbage=~s|\\(\w+)\\|\\|g;
4377: $garbage=~s|\\(\w+)(\s*)|$2|g;
4378: $garbage=~s|\+|11|g;
4379: my $value=length($garbage);
4380: return $value;
4381: }
4382:
4383:
4384: # is_inside_of $tagstack $tag
4385: # This sub returns true if the current state of Xml processing
4386: # is inside of the tag.
4387: # Parameters:
4388: # tagstack - The tagstack from the parser.
4389: # tag - The tag (without the <>'s.).
4390: # Sample usage:
4391: # if (is_inside_of($tagstack "table")) {
4392: # # I'm in a table....
4393: # }
4394: sub is_inside_of {
4395: my ($tagstack, $tag) = @_;
4396: my @stack = @$tagstack;
4397: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4398: if ($stack[$i] eq $tag) {
4399: return 1;
4400: }
4401: }
4402: return 0;
4403: }
4404:
4405:
4406: 1;
4407: __END__
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