1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.352 2007/01/18 20:48:02 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: }
1563: return $currentstring;
1564: }
1565:
1566: sub end_a {
1567: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1568: my $currentstring = '';
1569: if ($target eq 'web' || $target eq 'webgrade') {
1570: $currentstring .= $token->[2];
1571: }
1572: if ($target eq 'tex') {
1573: my $href =
1574: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1575: my $name =
1576: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1577: if ($href =~ /\S/) {
1578: $href =~ s/([^\\])%/$1\\\%/g;
1579: $currentstring .= ' ({\tt URI:'.&Apache::lonxml::latex_special_symbols($href).'})';
1580: } elsif ($name =~ /\S/) {
1581: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1582: } else {
1583: $currentstring.='';
1584: }
1585: }
1586: return $currentstring;
1587: }
1588:
1589: #-- <li> tag (end tag optional)
1590: sub start_li {
1591: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1592: my $currentstring = '';
1593: if ($target eq 'web' || $target eq 'webgrade') {
1594: $currentstring = $token->[4];
1595: } elsif ($target eq 'tex') {
1596: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1597: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1598: #FIXME need to support types i and I
1599: if ($type=~/disc/) {
1600: $currentstring .= ' \item[$\bullet$] ';
1601: } elsif ($type=~/circle/) {
1602: $currentstring .= ' \item[$\circ$] ';
1603: } elsif ($type=~/square/) {
1604: $currentstring .= ' \item[$\diamond$] ';
1605: } elsif ($type eq '1') {
1606: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1607: } elsif ($type eq 'A') {
1608: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1609: } elsif ($type eq 'a') {
1610: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1611: } elsif ($value ne '') {
1612: $currentstring .= ' \item['.$value.'] ';
1613: } else {
1614: $currentstring .= ' \item ';
1615: }
1616: $Apache::londefdef::list_index++;
1617: }
1618: return $currentstring;
1619: }
1620:
1621: sub end_li {
1622: my ($target,$token) = @_;
1623: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1624: if ($target eq 'web' || $target eq 'webgrade') {
1625: $currentstring .= $token->[2];
1626: }
1627: return $currentstring;
1628: }
1629:
1630: #-- <u> tag (end tag required)
1631: sub start_u {
1632: my ($target,$token) = @_;
1633: my $currentstring = '';
1634: if ($target eq 'web' || $target eq 'webgrade') {
1635: $currentstring .= $token->[4];
1636: } elsif ($target eq 'tex') {
1637: &Apache::lonxml::startredirection();
1638: }
1639: return $currentstring;
1640: }
1641:
1642: sub end_u {
1643: my ($target,$token) = @_;
1644: my $currentstring = '';
1645: if ($target eq 'web' || $target eq 'webgrade') {
1646: $currentstring .= $token->[2];
1647: } elsif ($target eq 'tex') {
1648: $currentstring=&Apache::lonxml::endredirection();
1649: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1650: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1651: $currentstring=~s/(\S)\s*$/$1\}/;
1652: }
1653: return $currentstring;
1654: }
1655:
1656: #-- <ul> tag (end tag required)
1657: sub start_ul {
1658: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1659: my $currentstring = &end_p(); # Close off enclosing list.
1660: if ($target eq 'web' || $target eq 'webgrade') {
1661: $currentstring .= $token->[4];
1662: } elsif ($target eq 'tex') {
1663: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1664: $Apache::londefdef::list_index=0;
1665: if ($TeXtype eq 'disc') {
1666: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1667: '\renewcommand{\labelitemii}{$\bullet$}'.
1668: '\renewcommand{\labelitemiii}{$\bullet$}'.
1669: '\renewcommand{\labelitemiv}{$\bullet$}';
1670: } elsif ($TeXtype eq 'circle') {
1671: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1672: '\renewcommand{\labelitemii}{$\circ$}'.
1673: '\renewcommand{\labelitemiii}{$\circ$}'.
1674: '\renewcommand{\labelitemiv}{$\circ$}';
1675: } elsif ($TeXtype eq 'square') {
1676: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1677: '\renewcommand{\labelitemii}{$\diamond$}'.
1678: '\renewcommand{\labelitemiii}{$\diamond$}'.
1679: '\renewcommand{\labelitemiv}{$\diamond$}';
1680: }
1681: $currentstring .= '\strut \begin{itemize}';
1682: }
1683: return $currentstring;
1684: }
1685:
1686: sub end_ul {
1687: my ($target,$token) = @_;
1688: my $currentstring = '';
1689: if ($target eq 'web' || $target eq 'webgrade') {
1690: $currentstring = $token->[2];
1691: } elsif ($target eq 'tex') {
1692: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1693: '\renewcommand{\labelitemii}{$\bullet$}'.
1694: '\renewcommand{\labelitemiii}{$\bullet$}'.
1695: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1696: }
1697: return $currentstring;
1698: }
1699:
1700: #-- <menu> tag (end tag required)
1701: sub start_menu {
1702: my ($target,$token) = @_;
1703: my $currentstring = '';
1704: if ($target eq 'web' || $target eq 'webgrade') {
1705: $currentstring = $token->[4];
1706: } elsif ($target eq 'tex') {
1707: $currentstring = " \\begin{itemize} ";
1708: }
1709: return $currentstring;
1710: }
1711:
1712: sub end_menu {
1713: my ($target,$token) = @_;
1714: my $currentstring = '';
1715: if ($target eq 'web' || $target eq 'webgrade') {
1716: $currentstring = $token->[2];
1717: } elsif ($target eq 'tex') {
1718: $currentstring = " \\end{itemize}";
1719: }
1720: return $currentstring;
1721: }
1722:
1723: #-- <dir> tag (end tag required)
1724: sub start_dir {
1725: my ($target,$token) = @_;
1726: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1727: if ($target eq 'web' || $target eq 'webgrade') {
1728: $currentstring .= $token->[4];
1729: } elsif ($target eq 'tex') {
1730: $currentstring .= " \\begin{itemize} ";
1731: }
1732: return $currentstring;
1733: }
1734:
1735: sub end_dir {
1736: my ($target,$token) = @_;
1737: my $currentstring = '';
1738: if ($target eq 'web' || $target eq 'webgrade') {
1739: $currentstring = $token->[2];
1740: } elsif ($target eq 'tex') {
1741: $currentstring = " \\end{itemize}";
1742: }
1743: return $currentstring;
1744: }
1745:
1746: #-- <ol> tag (end tag required)
1747: sub start_ol {
1748: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1749: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1750: if ($target eq 'web' || $target eq 'webgrade') {
1751: $currentstring .= $token->[4];
1752: } elsif ($target eq 'tex') {
1753: $Apache::londefdef::list_index=0;
1754: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1755: if ($type eq '1') {
1756: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1757: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1758: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1759: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1760: } elsif ($type eq 'A') {
1761: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1762: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1763: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1764: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1765: } elsif ($type eq 'a') {
1766: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1767: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1768: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1769: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1770: } elsif ($type eq 'i') {
1771: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1772: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1773: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1774: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1775: } elsif ($type eq 'I') {
1776: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1777: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1778: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1779: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1780: }
1781: $currentstring .= '\strut \begin{enumerate}';
1782: }
1783: return $currentstring;
1784: }
1785:
1786: sub end_ol {
1787: my ($target,$token) = @_;
1788: my $currentstring = '';
1789: if ($target eq 'web' || $target eq 'webgrade') {
1790: $currentstring = $token->[2];
1791: } elsif ($target eq 'tex') {
1792: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1793: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1794: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1795: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1796: }
1797: return $currentstring;
1798: }
1799:
1800: #-- <dl> tag (end tag required)
1801: sub start_dl {
1802: my ($target,$token) = @_;
1803: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1804: if ($target eq 'web' || $target eq 'webgrade') {
1805: $currentstring .= $token->[4];
1806: } elsif ($target eq 'tex') {
1807: $currentstring .= '\begin{description}';
1808: $Apache::londefdef::DL++;
1809: push(@Apache::londefdef::description,[]);
1810: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1811: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1812: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1813: }
1814: return $currentstring;
1815: }
1816:
1817: sub end_dl {
1818: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1819: my $currentstring = '';
1820: if ($target eq 'web' || $target eq 'webgrade') {
1821: $currentstring = $token->[2];
1822: } elsif ($target eq 'tex') {
1823: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1824: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1825: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1826: $currentstring.=' '.$element.' ';
1827: }
1828: pop(@Apache::londefdef::description);
1829: $currentstring.='\end{description}';
1830: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1831: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1832: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1833: $Apache::londefdef::DL--;
1834: }
1835: return $currentstring;
1836: }
1837:
1838: #-- <dt> tag (end tag optional)
1839: sub start_dt {
1840: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1841: my $currentstring='';
1842: if ($target eq 'web' || $target eq 'webgrade') {
1843: $currentstring = $token->[4];
1844: } elsif ($target eq 'tex') {
1845: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1846: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1847: &Apache::lonxml::startredirection();
1848: $Apache::londefdef::DT[-1]++;
1849: $Apache::londefdef::seenDT[-1]=1;
1850: }
1851: return $currentstring;
1852: }
1853:
1854: sub end_dt {
1855: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1856: my $currentstring = '';
1857: if ($target eq 'web' || $target eq 'webgrade') {
1858: $currentstring = $token->[2];
1859: } elsif ($target eq 'tex') {
1860: if ($Apache::londefdef::DT[-1]) {
1861: my $data=&item_cleanup();
1862: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1863: $Apache::londefdef::DT[-1]--;
1864: }
1865: }
1866: return $currentstring;
1867: }
1868:
1869: sub item_cleanup {
1870: my $item=&Apache::lonxml::endredirection();
1871: $item=~s/\\begin{center}//g;
1872: $item=~s/\\end{center}//g;
1873: return $item;
1874: }
1875:
1876: #-- <dd> tag (end tag optional)
1877: sub start_dd {
1878: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1879: my $currentstring = '';
1880: if ($target eq 'web' || $target eq 'webgrade') {
1881: $currentstring = $token->[4];
1882: } elsif ($target eq 'tex') {
1883: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1884: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1885: if (!$Apache::londefdef::seenDT[-1]) {
1886: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1887: }
1888: push(@{$Apache::londefdef::description[-1]},'');
1889: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1890: $Apache::londefdef::DD[-1]++;
1891: &Apache::lonxml::startredirection();
1892: }
1893: return $currentstring;
1894: }
1895:
1896: sub end_dd {
1897: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1898: my $currentstring = '';
1899: if ($target eq 'web' || $target eq 'webgrade') {
1900: $currentstring = $token->[2];
1901: } elsif ($target eq 'tex') {
1902: $Apache::londefdef::description[-1]->[-1].=
1903: &Apache::lonxml::endredirection().' \vskip 0mm ';
1904: $Apache::londefdef::DD[-1]--;
1905: }
1906: return $currentstring;
1907: }
1908:
1909: #-- <table> tag (end tag required)
1910: # <table> also ends any prior <p> that is not closed.
1911: # but, unless I allow <p>'s to nest, that's the
1912: # only way I could think of to allow <p> in
1913: # <tr> <th> bodies
1914: #
1915: #list of supported attributes: border,width,TeXwidth
1916: sub start_table {
1917: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1918: my $textwidth = '';
1919: my $currentstring = &end_p();
1920: if ($target eq 'web' || $target eq 'webgrade') {
1921: $currentstring .= $token->[4];
1922: } elsif ($target eq 'tex') {
1923: push(@Apache::londefdef::table, {});
1924: $Apache::londefdef::table[-1]{'row_number'} = -1;
1925: #maximum table's width (default coincides with text line length)
1926: if ($#Apache::londefdef::table==0) {
1927: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1928: $textwidth=~/(\d+\.?\d*)/;
1929: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1930: } else {
1931: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1932: #the maximum width of nested table is determined by LATeX width of parent cell
1933: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1934: } else {
1935: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1936: $textwidth=$Apache::londefdef::table[-2]{'width'};
1937: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1938: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1939: }
1940: }
1941: }
1942:
1943: # width either comes forced from the TeXwidth or the width parameters.
1944: # in either case it can be a percentage or absolute width.
1945: # in the width case we ignore absolute width
1946: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1947: if (!defined($TeXwidth)) {
1948: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1949: $safeeval,undef,1);
1950: if ($htmlwidth =~ /%/) {
1951: $TeXwidth = $htmlwidth;
1952: } else {
1953: $TeXwidth = $textwidth;
1954: }
1955: } else {
1956: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1957: }
1958: if ($TeXwidth=~/%/) {
1959: $Apache::londefdef::table[-1]{'percent'}=1;
1960: $TeXwidth=~/(\d+)/;
1961: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1962: } else {
1963: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1964: }
1965: # In the end, however the table width cannot be wider than $textwidth...
1966:
1967: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1968: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1969: }
1970:
1971: #table's border
1972: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1973: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1974: unless (defined $border) { $border = 0; }
1975: if ($border) {
1976: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1977: $Apache::londefdef::table[-1]{'vinc'} = '&';
1978: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1979: } else {
1980: $Apache::londefdef::table[-1]{'hinc'} = '';
1981: $Apache::londefdef::table[-1]{'vinc'} = '&';
1982: $Apache::londefdef::table[-1]{'vvinc'} = '';
1983: }
1984: if ($#Apache::londefdef::table==0) {
1985: # Note that \newline seems to destroy the alignment envs.
1986: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1987: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1988: }
1989: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1990: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1991: $Apache::londefdef::table[-1]{'objectlen'}=[];
1992: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1993: $Apache::londefdef::table[-1]{'maxlen'}=[];
1994: $Apache::londefdef::table[-1]{'minlen'}=[];
1995: $Apache::londefdef::table[-1]{'content'}=[];
1996: $Apache::londefdef::table[-1]{'align'}=[];
1997: if (&is_inside_of($tagstack, 'sup')) {
1998: $currentstring .= '}} \\\\ \ensuremath{^{ ';
1999: }
2000: if (&is_inside_of($tagstack, 'sub')) {
2001: $currentstring .= '}} \\\\ \ensuremath{_{ ';
2002: }
2003: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2004:
2005:
2006: }
2007: return $currentstring;
2008: }
2009:
2010: sub end_table {
2011: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2012: my $currentstring = '';
2013: if ($target eq 'web' || $target eq 'webgrade') {
2014: $currentstring = $token->[2];
2015: } elsif ($target eq 'tex') {
2016: my $inmemory = '';
2017: my $output = '';
2018: my $WARNING='';
2019: #width of columns from TeXwidth attributes
2020:
2021: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2022: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2023: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2024: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2025: }
2026: }
2027: }
2028: #free space and number of empty columns
2029: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2030: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2031: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2032: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2033: $empty_columns++;
2034: } else {
2035: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2036: }
2037: }
2038: #boundaries for contents columns
2039: my @min_len=();#columns can not be narrower
2040: my @max_len=();#maximum length of column
2041: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2042: my ($localmin,$localmax)=(0,0);
2043: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2044: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2045: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2046: }
2047: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2048: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2049: }
2050: }
2051: push @min_len, $localmin;
2052: push @max_len, $localmax;
2053: }
2054: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2055: my $localmin=0,;
2056: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2057: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2058: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2059: }
2060: }
2061: if ($max_len[$jn]<$localmin) {
2062: $max_len[$jn]=$localmin;
2063: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2064: }#object size is bigger
2065: if ($min_len[$jn]<$localmin) {
2066: $min_len[$jn]=$localmin;
2067: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2068: }#object size is bigger
2069: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2070: $min_len[$jn]=0;
2071: $max_len[$jn]=0;
2072: }
2073: }
2074: #final adjustment of column width
2075: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2076: my @adjust=();
2077: #step 1. adjustment by maximum value
2078: my $space_neeeded=0;
2079: for (my $jn=0;$jn<=$#max_len;$jn++) {
2080: $space_neeeded=$space_neeeded+$max_len[$jn];
2081: }
2082: if ($space_neeeded<=$available_space) {
2083: for (my $jn=0;$jn<=$#max_len;$jn++) {
2084: if ($fwidth[$jn]==0) {
2085: $fwidth[$jn]=$max_len[$jn];
2086: }
2087: }
2088: } else {
2089: #step 2. adjustment by minimum value (estimation)
2090: $space_neeeded=0;
2091: for (my $jn=0;$jn<=$#min_len;$jn++) {
2092: $space_neeeded+=$min_len[$jn];
2093: }
2094: if ($space_neeeded>$available_space) {
2095: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2096: for (my $jn=0;$jn<=$#max_len;$jn++) {
2097: if ($fwidth[$jn]==0) {
2098: $fwidth[$jn]=$min_len[$jn];
2099: }
2100: }
2101: #check if we have objects which can be scaled
2102: my $how_many_to_scale=0;
2103: my @to_scale=();
2104: for (my $jn=0;$jn<=$#max_len;$jn++) {
2105: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2106: $how_many_to_scale++;
2107: push @to_scale, $jn;
2108: }
2109: }
2110: if ($how_many_to_scale>0) {
2111: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2112: foreach my $jn (@to_scale) {
2113: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2114: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2115: if ($1 ne '') {
2116: my $current_length=&recalc($1);
2117: $current_length=~/(\d+\.?\d*)/;
2118: $current_length=$current_length-$space_to_adjust;
2119: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2120: }
2121: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2122: if ($1 ne '') {
2123: my $current_length=$1;
2124: $current_length=$current_length-$space_to_adjust;
2125: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2126: }
2127: }
2128: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2129: }
2130: }
2131: } else {
2132: #step 3. adjustment over minimal + corrections
2133: my $enlarge_coef=$available_space/$space_neeeded;
2134: my $acsessive=0;
2135: for (my $jn=0;$jn<=$#min_len;$jn++) {
2136: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2137: if ($adjust[$jn]>$max_len[$jn]) {
2138: $fwidth[$jn]=$max_len[$jn];
2139: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2140: $adjust[$jn]=0;
2141: }
2142: }
2143: if ($acsessive>0) {
2144: #we have an excess of space and can redistribute it
2145: my $notempty_columns=0;
2146: for (my $jn=0;$jn<=$#min_len;$jn++) {
2147: if ($adjust[$jn]!=0) {
2148: $notempty_columns++;
2149: }
2150: }
2151: my $per_column=$acsessive/$notempty_columns;
2152: for (my $jn=0;$jn<=$#min_len;$jn++) {
2153: if ($adjust[$jn]!=0) {
2154: $adjust[$jn]+=$per_column;
2155: $fwidth[$jn]=$adjust[$jn];
2156: }
2157: }
2158: } else {
2159: for (my $jn=0;$jn<=$#min_len;$jn++) {
2160: $fwidth[$jn]=$adjust[$jn];
2161: }
2162: }
2163: }
2164: }
2165: #use all available width if it is defined in % or as TeXwidth
2166: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2167: my $current=0;
2168: for (my $i=0;$i<=$#fwidth;$i++) {
2169: $current+=$fwidth[$i];
2170: }
2171: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2172: for (my $i=0;$i<=$#fwidth;$i++) {
2173: $fwidth[$i]*=$coef;
2174: }
2175: }
2176: #removing of empty columns if allowed
2177: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2178: if ($permission eq 'yes') {
2179: my @cleaned_table=();
2180: my @cleaned_header=();
2181: my $colind=0;
2182: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2183: if ($fwidth[$jn]!=0) {
2184: #we need to copy column
2185: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2186: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2187: $cleaned_header[$colind]=$fwidth[$jn];
2188: }
2189: $colind++;
2190: }
2191: }
2192: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2193: @fwidth=@cleaned_header;
2194: }
2195: #construct header of the table
2196: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2197: for (my $in=0;$in<=$#fwidth;$in++) {
2198: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2199: }
2200: $header_of_table .= '}';
2201: #fill the table
2202: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2203: my $have_rowspan = 0;
2204: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2205:
2206: #-----------------------------------------------------------
2207: # I think this order of doing things will ensure that
2208: # single rowspan, columspan and combined row/colspans will
2209: # work correctly. LaTeX is delicate here.
2210: # RF.
2211:
2212: # Start a rowspan if necessary:
2213:
2214: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2215: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2216: #
2217: # Do the appropriate magic if this has a colspan
2218: #
2219:
2220: if ($colspan > 1) {
2221: my $spanwidth = 0;
2222: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2223: $spanwidth += $fwidth[$spancol];
2224: }
2225: $output .= '\multicolumn{'.
2226: $colspan
2227: ."}";
2228: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2229: $output .= '{|c|}{';
2230: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2231: $output .= '{|r|}{';
2232: }
2233: else {
2234: $output .= "{|p{$spanwidth mm}|}{";
2235: }
2236:
2237: }
2238:
2239: # Rowspan... if colspan is 1, and there's an alignment we'll need
2240: # to kick in a multicolumn in order to get the alignment spec.
2241: # this must precede the multirow or LaTex gets quite upset.
2242: # Naturally if colspan > 1 we've already done that above ^
2243: #
2244: my $multirow_aligned = 0;
2245: if ($rowspan > 1) {
2246: if ($colspan == 1) {
2247: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2248: $output .= '\multicolumn{1}{|c|}{';
2249: $multirow_aligned = 1;
2250: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2251: $output .= '\multicolumn{1}{|r|}{';
2252: $multirow_aligned = 1;
2253: }
2254: }
2255: $have_rowspan++;
2256: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2257:
2258: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2259: s{^\s*\\par\s*}{};
2260: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2261: s{\s*\\vskip\s*0pt\s*$}{};
2262:
2263: #
2264: # If we did not throw in a multicolumn to align, then add
2265: # an extra {
2266: # so we close correctly without having to keep additional state
2267: # around
2268: #
2269: if (!$multirow_aligned) {
2270: $output .= '{';
2271: }
2272: }
2273: if (($rowspan eq '^') || ($rowspan eq '_')) {
2274: $have_rowspan++;
2275: }
2276: #--------------------------------------------------------------
2277:
2278:
2279: # For right and center alignment of single cells.
2280: # we are going to use a multicolumn with a span of 1 to specify alignment.
2281: #
2282: if ($colspan == 1 && $rowspan == 1) {
2283: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2284: $output .= '\multicolumn{1}{|c|}{';
2285: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2286: $output .= '\multicolumn{1}{|r|}{';
2287: }
2288: }
2289:
2290: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2291:
2292: if (($colspan == 1 && $rowspan == 1) &&
2293: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2294: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2295: $output .= '}';
2296: }
2297:
2298: # Close off any open multirow:
2299:
2300: if ($rowspan > 1) {
2301: $output .= '}}';
2302: }
2303: # Close off the colspan...
2304: #
2305: if ($colspan > 1) {
2306: $output .= '}';
2307: $jn += $colspan-1; # Adjust for number of rows really left.
2308: }
2309: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2310: }
2311: # If have_rowspan > 0, and borders are on, then
2312: # we need to do more than put an \hline at the bottom of row.
2313: # we need to do the appropriate \cline to ensure that
2314: # the spanned rows don't have \hlines through them.
2315:
2316: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2317: $output .= ' \\\\ ';
2318: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2319: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2320: if ($rowspan ne "^") {
2321: if (($rowspan <= 1) || ($rowspan eq '_')) {
2322: my $column = $jn+1;
2323: $output .= '\cline{'.$column.'-'.$column.'} ';
2324: }
2325: }
2326: }
2327:
2328: } else {
2329: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2330: }
2331: }
2332: # Note that \newline destroys alignment env's produced by e.g. <div>
2333: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2334: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2335: if ($#Apache::londefdef::table > 0) {
2336: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2337: # Figure out max/and min width by summing us and then
2338: # apply that to the current column of the table we nest in
2339: # if it's larger than the current width or the current width
2340: # is undefined.
2341: #
2342: my $min_nested_width = 0;
2343: my $max_nested_width = 0;
2344: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2345: $min_nested_width += $min_len[$col];
2346: $max_nested_width += $max_len[$col];
2347:
2348: }
2349: # Fudge in an extra 5 mm for borders etc:
2350:
2351: $min_nested_width += 5;
2352: $max_nested_width += 5;
2353:
2354: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2355: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2356: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2357: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2358: }
2359: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2360: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2361: }
2362:
2363: pop @Apache::londefdef::table;
2364: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2365: } else {
2366: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2367: pop @Apache::londefdef::table;
2368: undef @Apache::londefdef::table;
2369: }
2370: }
2371: return $currentstring;
2372: }
2373:
2374: #-- <tr> tag (end tag optional)
2375: sub start_tr {
2376: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2377: my $currentstring = '';
2378: if ($target eq 'web' || $target eq 'webgrade') {
2379: $currentstring = $token->[4];
2380: } elsif ($target eq 'tex') {
2381: $Apache::londefdef::table[-1]{'row_number'}++;
2382: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2383: if ($alignchar ne '') {
2384: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2385: } else {
2386: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2387: }
2388: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2389: #
2390: # Need to save the number of table columns to preserve the max # columns.
2391: #
2392: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2393: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2394: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2395: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2396: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2397: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2398: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2399: }
2400: return $currentstring;
2401: }
2402:
2403: sub end_tr {
2404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2405: my $currentstring = &end_p(); # Close any pending <p> in the row.
2406: if ($target eq 'web' || $target eq 'webgrade') {
2407: $currentstring .= $token->[2];
2408: } elsif ($target eq 'tex') {
2409: if ($Apache::londefdef::TD_redirection) {
2410: &end_td_tex($parstack,$parser,$safeeval);
2411: }
2412: # Counter columns must be the maximum number of columns seen
2413: # in the table so far so:
2414: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2415: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2416: }
2417:
2418:
2419:
2420: }
2421: return $currentstring;
2422: }
2423:
2424: #-- <td> tag (end tag optional)
2425: sub start_td {
2426: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2427: my $currentstring = '';
2428: if ($target eq 'web' || $target eq 'webgrade') {
2429: $currentstring = $token->[4];
2430: } elsif ($target eq 'tex') {
2431: $Apache::londefdef::TD_redirection = 1;
2432: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2433: }
2434: return $currentstring;
2435: }
2436:
2437: sub tag_check {
2438: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2439: my @ar=@$parstack;
2440: for (my $i=$#ar-1;$i>=0;$i--) {
2441: if (lc($$tagstack[$i]) eq $good_tag) {
2442: &start_td_tex($parstack,$parser,$safeeval);
2443: last;
2444: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2445: splice @ar, $i+1;
2446: &end_td_tex(\@ar,$parser,$safeeval);
2447: &start_td_tex($parstack,$parser,$safeeval);
2448: last;
2449: }
2450: }
2451: return '';
2452: }
2453:
2454: sub start_td_tex {
2455: my ($parstack,$parser,$safeeval) = @_;
2456: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2457: if ($alignchar eq '') {
2458: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2459: }
2460: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2461: $Apache::londefdef::table[-1]{'counter_columns'}++;
2462: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2463: if (defined $TeXwidth) {
2464: my $current_length=&recalc($TeXwidth);
2465: $current_length=~/(\d+\.?\d*)/;
2466: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2467: }
2468: &Apache::lonxml::startredirection();
2469: return '';
2470: }
2471:
2472: sub end_td_tex {
2473: my ($parstack,$parser,$safeeval) = @_;
2474: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2475: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2476: my $data = &Apache::lonxml::endredirection();
2477:
2478: # The rowspan array of the table indicates which cells are part of a span.
2479: # n indicates the start of a span set of n rows.
2480: # ^ indicates a cell that continues a span set.
2481: # _ indicates the cell is at the bottom of a span set.
2482: # If this and subsequent cells are part of a rowspan, we must
2483: # push along the row until we find one that is not.
2484:
2485: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2486: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2487: # Part of a span.
2488: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2489: $current_column++;
2490: }
2491: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2492:
2493:
2494: # Get the column and row spans.
2495: # Colspan can be done via \multicolumn if I can figure out the data structs.
2496:
2497: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2498: if (!$colspan) {
2499: $colspan = 1;
2500: }
2501:
2502: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2503: if (!$rowspan) {
2504: $rowspan = 1;
2505: }
2506:
2507:
2508:
2509: for (my $c = 0; $c < $colspan; $c++) {
2510: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2511: for (my $i = 1; $i < $rowspan; $i++) {
2512: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2513: if ($i == ($rowspan-1)) {
2514: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2515: }
2516: }
2517: }
2518:
2519: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2520: if (defined $TeXwidth) {
2521: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2522: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2523: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2524: } else {
2525: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2526: my $garbage_data=$data;
2527: my $fwidth=0;
2528: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2529: my $current_length=&recalc($1);
2530: $current_length=~/(\d+\.?\d*)/;
2531: if ($fwidth<$1) {$fwidth=$1;}
2532: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2533: }
2534: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2535: my $current_length=$1;
2536: if ($fwidth<$current_length) {$fwidth=$current_length;}
2537: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2538: }
2539: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2540: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2541: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2542: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2543: } elsif ($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)*/) {
2544: my $garbage_data=$data;
2545: my $fwidth=0;
2546: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2547: my $current_length=&recalc($1);
2548: $current_length=~/(\d+\.?\d*)/;
2549: if ($fwidth<$1) {$fwidth=$1;}
2550: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2551: }
2552: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2553: my $current_length=&recalc($1);
2554: $current_length=~/(\d+\.?\d*)/;
2555: if ($fwidth<$1) {$fwidth=$1;}
2556: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2557: }
2558: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2559: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2560: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2561: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2562: $data=~s/\\\\\s*$//;
2563: } else {
2564: $data=~s/^\s+(\S.*)/$1/;
2565: $data=~s/(.*\S)\s+$/$1/;
2566: $data=~s/(\s)+/$1/;
2567: my ($current_length,$min_length)=(0,0);
2568: if ($data=~/\\vskip/) {
2569: my $newdata=$data;
2570: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2571: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2572: foreach my $elementdata (@newdata) {
2573: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2574: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2575: my @words=split(/ /,$elementdata);
2576: foreach my $word (@words) {
2577: my $lengthword=2.5*&LATEX_length($word);
2578: if ($min_length<$lengthword) {$min_length=$lengthword;}
2579: }
2580: }
2581: } else {
2582: $current_length=2.5*&LATEX_length($data);
2583: my @words=split(/ /,$data);
2584: foreach my $word (@words) {
2585: my $lengthword=2*&LATEX_length($word);
2586: if ($min_length<$lengthword) {$min_length=$lengthword;}
2587: }
2588: }
2589: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2590: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2591: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2592: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2593: }
2594: }
2595: # Substitute all of the tables nested in this cell in their appropriate places.
2596:
2597:
2598: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2599: for (my $in=0; $in<=$nested_count; $in++) {
2600: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2601: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2602: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2603: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2604:
2605: }
2606: # Should be be killing off the 'include' elements as they're used up?
2607:
2608: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2609:
2610:
2611:
2612:
2613: # the colspan array will indicate how many columns will be spanned by this
2614: # cell..this requires that counter_columns also be adjusted accordingly
2615: # so that the next bunch of text goes in the right cell. Note that since
2616: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2617: #
2618:
2619: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2620: for (my $i = 0; $i < ($colspan -1); $i++) {
2621: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2622: }
2623: for (my $r = 0; $r < $rowspan; $r++) {
2624: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2625: # Put empty text in spanned cols.
2626:
2627: }
2628:
2629:
2630:
2631: return '';
2632: }
2633:
2634: sub end_td {
2635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2636: my $currentstring = '';
2637: if ($target eq 'web' || $target eq 'webgrade') {
2638: $currentstring = $token->[2];
2639: } elsif ($target eq 'tex') {
2640: $Apache::londefdef::TD_redirection =0;
2641: &end_td_tex($parstack,$parser,$safeeval);
2642: }
2643: return $currentstring;
2644: }
2645:
2646: #-- <th> tag (end tag optional)
2647: sub start_th {
2648: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2649: my $currentstring = '';
2650: if ($target eq 'web' || $target eq 'webgrade') {
2651: $currentstring = $token->[4];
2652: } elsif ($target eq 'tex') {
2653: $Apache::londefdef::TD_redirection = 1;
2654: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2655: }
2656: return $currentstring;
2657: }
2658:
2659: sub tagg_check {
2660: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2661: my @ar=@$parstack;
2662: for (my $i=$#ar-1;$i>=0;$i--) {
2663: if (lc($$tagstack[$i]) eq $good_tag) {
2664: &start_th_tex($parstack,$parser,$safeeval);
2665: last;
2666: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2667: splice @ar, $i+1;
2668: &end_th_tex(\@ar,$parser,$safeeval);
2669: &start_th_tex($parstack,$parser,$safeeval);
2670: last;
2671: }
2672: }
2673: return '';
2674: }
2675:
2676: sub start_th_tex {
2677: my ($parstack,$parser,$safeeval) = @_;
2678: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2679: if ($alignchar eq '') {
2680: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2681: }
2682: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2683: $Apache::londefdef::table[-1]{'counter_columns'}++;
2684: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2685: if (defined $TeXwidth) {
2686: my $current_length=&recalc($TeXwidth);
2687: $current_length=~/(\d+\.?\d*)/;
2688: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2689: }
2690: &Apache::lonxml::startredirection();
2691: return '';
2692: }
2693:
2694: sub end_th_tex {
2695: my ($parstack,$parser,$safeeval) = @_;
2696: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2697: my $data=&Apache::lonxml::endredirection();
2698: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2699: if (defined $TeXwidth) {
2700: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2701: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2702: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2703: } else {
2704: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2705: my $garbage_data=$data;
2706: my $fwidth=0;
2707: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2708: my $current_length=&recalc($1);
2709: $current_length=~/(\d+\.?\d*)/;
2710: if ($fwidth<$1) {$fwidth=$1;}
2711: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2712: }
2713: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2714: my $current_length=$1;
2715: if ($fwidth<$current_length) {$fwidth=$current_length;}
2716: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2717: }
2718: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2719: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2720: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2721: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2722: } else {
2723: $data=~s/^\s+(\S.*)/$1/;
2724: $data=~s/(.*\S)\s+$/$1/;
2725: $data=~s/(\s)+/$1/;
2726: my ($current_length,$min_length)=(0,0);
2727: if ($data=~/\\vskip/) {
2728: my $newdata=$data;
2729: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2730: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2731: foreach my $elementdata (@newdata) {
2732: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2733: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2734: my @words=split(/ /,$elementdata);
2735: foreach my $word (@words) {
2736: my $lengthword=2.5*&LATEX_length($word);
2737: if ($min_length<$lengthword) {$min_length=$lengthword;}
2738: }
2739: }
2740: } else {
2741: $current_length=2.5*&LATEX_length($data);
2742: my @words=split(/ /,$data);
2743: foreach my $word (@words) {
2744: my $lengthword=2*&LATEX_length($word);
2745: if ($min_length<$lengthword) {$min_length=$lengthword;}
2746: }
2747: }
2748: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2749: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2750: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2751: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2752: }
2753: }
2754: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2755: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2756: }
2757: #make data bold
2758: $data='\textbf{'.$data.'}';
2759: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2760: return'';
2761: }
2762:
2763: sub end_th {
2764: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2765: my $currentstring = &end_p(); # Close any open <p> in the row.
2766: if ($target eq 'web' || $target eq 'webgrade') {
2767: $currentstring .= $token->[2];
2768: } elsif ($target eq 'tex') {
2769: $Apache::londefdef::TD_redirection =0;
2770: &end_th_tex($parstack,$parser,$safeeval);
2771: }
2772: return $currentstring;
2773: }
2774:
2775: #-- <img> tag (end tag forbidden)
2776: #
2777: # Render the <IMG> tag.
2778: # <IMG> has the following attributes (in addition to the
2779: # standard HTML ones:
2780: # TeXwrap - Governs how the tex target will try to wrap text around
2781: # horizontally aligned images.
2782: # TeXwidth - The width of the image when rendered for print (mm).
2783: # TeXheight - The height of the image when rendered for print (mm)
2784: # (Note there seems to also be support for this as a % of page size)
2785: #
2786: sub start_img {
2787: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2788: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2789: undef,1);
2790: if (! $src &&
2791: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2792: ) {
2793: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2794: return '';
2795: }
2796: &Apache::lonxml::extlink($src);
2797: my $currentstring = '';
2798: my $scaling = .3;
2799:
2800: # Render unto browsers that which are the browser's...
2801:
2802: if ($target eq 'web' || $target eq 'webgrade') {
2803: if ($env{'browser.imagesuppress'} ne 'on') {
2804: my $enc = ('yes' eq
2805: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2806: $safeeval)));
2807: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2808: $enc);
2809: } else {
2810: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2811: undef,1);
2812: if (!$alttag) {
2813: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2814: $src);
2815: }
2816: $currentstring.='[IMAGE: '.$alttag.']';
2817: }
2818:
2819: # and render unto TeX that which is LaTeX
2820:
2821: } elsif ($target eq 'tex') {
2822: #
2823: # The alignment will require some superstructure to be put around
2824: # the \includegraphics stuff. At present we can only partially
2825: # simulate the alignments offered by html.
2826: #
2827: #
2828: my $align = lc(&Apache::lonxml::get_param('align',
2829: $parstack,
2830: $safeeval,
2831: undef,1));
2832: if(!$align) {
2833: $align = "bottom"; # This is html's default so it's ours too.
2834: }
2835: #
2836: &Apache::lonxml::debug("Alignemnt = $align");
2837: # LaTeX's image/text wrapping is really bad since it wants to
2838: # make figures float.
2839: # The user has the optional parameter (applicable only to l/r
2840: # alignment to use the picins/parpic directive to get wrapped text
2841: # this is also imperfect.. that's why we give them a choice...
2842: # so they can't yell at us for our choice.
2843: #
2844: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2845: $parstack,
2846: $safeeval,
2847: undef,0);
2848: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2849: if(!$latex_rendering) {
2850: $latex_rendering = "texwrap";
2851: }
2852: # using texwrap inside a table does not work. So, if after all of this,
2853: # texwrap is on, we turn it off if we detect we're in a table:
2854: #
2855: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2856: $latex_rendering = 'parpic';
2857: }
2858:
2859: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2860:
2861: #if original gif/jpg/png file exist do following:
2862: my $origsrc=$src;
2863: my ($path,$file) = &get_eps_image($src);
2864: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2865: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2866: &Apache::lonxml::debug("path = $path file = $file src = $src");
2867: if (-e $src) {
2868: &Apache::lonxml::debug("$src exists");
2869: my ($height_param,$width_param)=
2870: &image_size($origsrc,0.3,$parstack,$safeeval);
2871: my $size;
2872: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2873: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2874: # Default size if not able to extract that (e.g. eps image).
2875:
2876: # &Apache::lonnet::logthis("Size = $size");
2877:
2878: $size='['.$size;
2879: $size=~s/,$/]/;
2880: $currentstring .= '\graphicspath{{'.$path.'}}'
2881: .'\includegraphics'.$size.'{'.$file.'} ';
2882:
2883: # If there's an alignment specification we need to honor it here.
2884: # For the horizontal alignments, we will also honor the
2885: # value of the latex specfication. The default is parbox,
2886: # and that's used for illegal values too.
2887: #
2888: # Even though we set a default alignment value, the user
2889: # could have given us an illegal value. In that case we
2890: # just use the default alignment of bottom..
2891: if ($align eq "top") {
2892: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2893: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2894: my $offset = $height_param/2;
2895: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2896: } elsif ($align eq "left") {
2897: if ($latex_rendering eq "parpic") {
2898: $currentstring = '\parpic[l]{'.$currentstring.'}';
2899: } elsif ($latex_rendering eq "parbox") {
2900: $currentstring = '\begin{minipage}[l]{'.$width_param.'mm}'
2901: .$currentstring.'\end{minipage}';
2902: } elsif ($latex_rendering eq "wrapfigure"
2903: || $latex_rendering ne 'none') { # wrapfig render
2904: $currentstring =
2905: '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2906: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2907: }
2908: } elsif ($align eq "right") {
2909: if ($latex_rendering eq "parpic") {
2910: $currentstring = '\parpic[r]{'.$currentstring.'}';
2911: } elsif ($latex_rendering eq "parbox") {
2912: $currentstring = '\begin{minipage}[r]{'.$width_param.'mm}'
2913: .$currentstring.'\end{minipage}';
2914: } elsif ($latex_rendering eq "wrapfigure"
2915: || $latex_rendering ne 'none') { # wrapfig render
2916: $currentstring =
2917: '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2918: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2919: }
2920: } else { # Bottom is also default.
2921: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2922: }
2923: } else {
2924: &Apache::lonxml::debug("$src does not exist");
2925: #original image file doesn't exist so check the alt attribute
2926: my $alt =
2927: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2928: unless ($alt) {
2929: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2930: }
2931:
2932: if ($alt) { $currentstring .= ' '.$alt.' '; }
2933: }
2934:
2935: # And here's where the semi-quote breaks down: allow the user
2936: # to edit the beast as well by rendering the problem for edit:
2937: } elsif ($target eq 'edit') {
2938: $currentstring .=&Apache::edit::tag_start($target,$token);
2939: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2940: &Apache::edit::browse('src',undef,'alt').' '.
2941: &Apache::edit::search('src',undef,'alt').'<br />';
2942: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2943: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2944: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2945: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2946: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2947: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2948: ['','bottom','middle','top','left','right'],$token,5);
2949: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2950: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
2951: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2952: ['no','yes'], $token, 2);
2953: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2954: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2955: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2956: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2957: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2958:
2959:
2960: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2961: if ($width) { $currentstring.=' width="'.$width.'" '; }
2962: if ($height) { $currentstring.=' height="'.$height.'" '; }
2963: $currentstring .= ' />';
2964: } elsif ($target eq 'modified') {
2965: my ($osrc,$owidth,$oheight)=
2966: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2967: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2968: $safeeval,'src','alt','align',
2969: 'TeXwidth','TeXheight', 'TeXwrap',
2970: 'width','height','encrypturl');
2971: my ($nsrc,$nwidth,$nheight)=
2972: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2973: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2974: &image_replication($loc);
2975: my ($iwidth,$iheight);
2976: if (-e $loc) {
2977: my $image = Image::Magick->new;
2978: $image->Read($loc);
2979: ($iwidth, $iheight) = ($image->Get('width'),
2980: $image->Get('height'));
2981: }
2982: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2983: # changed image or no size specified,
2984: # if they didn't explicitly change the
2985: # width or height use the ones from the image
2986: if ($iwidth && $iheight) {
2987: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2988: $token->[2]{'width'} = $iwidth;$ctag=1;
2989: }
2990: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2991: $token->[2]{'height'}=$iheight;$ctag=1;
2992: }
2993: }
2994: }
2995: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2996: # if we don't have a width or height
2997: if ($iwidth && $cwidth && !$cheight) {
2998: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2999: }
3000: if ($iheight && $cheight && !$cwidth) {
3001: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
3002: }
3003: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
3004: }
3005:
3006: return $currentstring;
3007: }
3008:
3009: sub end_img {
3010: my ($target,$token) = @_;
3011: my $currentstring = '';
3012: if ($target eq 'web' || $target eq 'webgrade') {
3013: $currentstring = $token->[2];
3014: } elsif ($target eq 'tex') {
3015: $currentstring = '';
3016: }
3017: return $currentstring;
3018: }
3019:
3020: #-- <applet> tag (end tag required)
3021: sub start_applet {
3022: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3023:
3024: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3025: &Apache::lonxml::extlink($code);
3026: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3027: undef,1);
3028: &Apache::lonxml::extlink($archive);
3029: my $currentstring = '';
3030: if ($target eq 'web' || $target eq 'webgrade') {
3031: if ($env{'browser.appletsuppress'} ne 'on') {
3032: $currentstring = &Apache::lonenc::encrypt_ref($token,
3033: {'code'=>$code,
3034: 'archive'=>$archive}
3035: );
3036: } else {
3037: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3038: $safeeval,undef,1);
3039: unless ($alttag) {
3040: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3041: $code);
3042: }
3043: $currentstring='[APPLET: '.$alttag.']';
3044: }
3045: } elsif ($target eq 'tex') {
3046: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3047: $safeeval,undef,1);
3048: unless ($alttag) {
3049: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3050: undef,1);
3051: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3052: $code);
3053: }
3054: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3055: '.}\end{center}';
3056: }
3057: return $currentstring;
3058: }
3059:
3060: sub end_applet {
3061: my ($target,$token) = @_;
3062: my $currentstring = '';
3063: if ($target eq 'web' || $target eq 'webgrade') {
3064: $currentstring = $token->[2];
3065: } elsif ($target eq 'tex') {
3066: }
3067: return $currentstring;
3068: }
3069:
3070: #-- <embed> tag (end tag optional/required)
3071: sub start_embed {
3072: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3073: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3074: &Apache::lonxml::extlink($src);
3075: my $currentstring = '';
3076: if ($target eq 'web' || $target eq 'webgrade') {
3077: if ($env{'browser.embedsuppress'} ne 'on') {
3078: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3079: } else {
3080: my $alttag=&Apache::lonxml::get_param
3081: ('alt',$parstack,$safeeval,undef,1);
3082: unless ($alttag) {
3083: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3084: }
3085: $currentstring='[EMBED: '.$alttag.']';
3086: }
3087: } elsif ($target eq 'tex') {
3088: }
3089: return $currentstring;
3090: }
3091:
3092: sub end_embed {
3093: my ($target,$token) = @_;
3094: my $currentstring = '';
3095: if ($target eq 'web' || $target eq 'webgrade') {
3096: $currentstring = $token->[2];
3097: } elsif ($target eq 'tex') {
3098: }
3099: return $currentstring;
3100: }
3101:
3102: #-- <param> tag (end tag forbidden)
3103: sub start_param {
3104: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3105: if (&Apache::lonxml::get_param('name',$parstack,
3106: $safeeval,undef,1)=~/^cabbase$/i) {
3107: my $value=&Apache::lonxml::get_param('value',$parstack,
3108: $safeeval,undef,1);
3109: &Apache::lonxml::extlink($value);
3110: }
3111:
3112: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3113: &Apache::lonxml::extlink($src);
3114: my $currentstring = '';
3115: if ($target eq 'web' || $target eq 'webgrade') {
3116: my %toconvert;
3117: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3118: if ($src) { $toconvert{'src'}= $src; }
3119: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3120: undef,1);
3121: if ($name=~/^cabbase$/i) {
3122: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3123: $safeeval,undef,1);
3124: }
3125: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3126: } elsif ($target eq 'tex') {
3127: }
3128: return $currentstring;
3129: }
3130:
3131: sub end_param {
3132: my ($target,$token) = @_;
3133: my $currentstring = '';
3134: if ($target eq 'web' || $target eq 'webgrade') {
3135: $currentstring = $token->[2];
3136: } elsif ($target eq 'tex') {
3137: }
3138: return $currentstring;
3139: }
3140:
3141: #-- <allow> tag
3142: sub start_allow {
3143: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3144: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3145: &Apache::lonxml::extlink($src);
3146:
3147: if ($target eq 'tex') { &image_replication($src); }
3148: my $result;
3149: if ($target eq 'edit') {
3150: $result .=&Apache::edit::tag_start($target,$token);
3151: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3152: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3153: } elsif ($target eq 'modified') {
3154: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3155: $safeeval,'src');
3156: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3157: }
3158: return $result;
3159: }
3160:
3161: sub end_allow {
3162: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3163: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3164: return '';
3165: }
3166:
3167: #-- Frames (end tag required)
3168: #-- <frameset>
3169: sub start_frameset {
3170: my ($target,$token) = @_;
3171: my $currentstring = ''; # Close any pending para.
3172: if ($target eq 'web' || $target eq 'webgrade') {
3173: $currentstring =
3174: &Apache::loncommon::start_page($Apache::londefdef::title,
3175: $Apache::londefdef::head,
3176: {'add_entries' => $token->[2],
3177: 'no_title' => 1,
3178: 'force_register' => 1,
3179: 'frameset' => 1,});
3180:
3181: }
3182: return $currentstring;
3183: }
3184:
3185: sub end_frameset {
3186: my ($target,$token) = @_;
3187: my $currentstring = '';
3188: if ($target eq 'web' || $target eq 'webgrade') {
3189: $currentstring = $token->[2];
3190: }
3191: return $currentstring;
3192: }
3193:
3194: #-- <xmp> (end tag required)
3195: sub start_xmp {
3196: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3197: my $currentstring = '';
3198: if ($target eq 'web' || $target eq 'webgrade') {
3199: $currentstring .= $token->[4];
3200: } elsif ($target eq 'tex') {
3201: $currentstring .= '\begin{verbatim}';
3202: }
3203: return $currentstring;
3204: }
3205:
3206: sub end_xmp {
3207: my ($target,$token) = @_;
3208: my $currentstring = '';
3209: if ($target eq 'web' || $target eq 'webgrade') {
3210: $currentstring .= $token->[2];
3211: } elsif ($target eq 'tex') {
3212: $currentstring .= '\end{verbatim}';
3213: }
3214: return $currentstring;
3215: }
3216:
3217: #-- <pre> (end tag required)
3218: sub start_pre {
3219: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3220: my $currentstring = &end_p(); # close off pending <p>
3221: if ($target eq 'web' || $target eq 'webgrade') {
3222: $currentstring .= $token->[4];
3223: } elsif ($target eq 'tex') {
3224: $currentstring .= '\begin{verbatim}';
3225: &Apache::lonxml::disable_LaTeX_substitutions();
3226: }
3227: return $currentstring;
3228: }
3229:
3230: sub end_pre {
3231: my ($target,$token) = @_;
3232: my $currentstring = '';
3233: if ($target eq 'web' || $target eq 'webgrade') {
3234: $currentstring .= $token->[2];
3235: } elsif ($target eq 'tex') {
3236: $currentstring .= '\end{verbatim}';
3237: &Apache::lonxml::enable_LaTeX_substitutions();
3238: }
3239: return $currentstring;
3240: }
3241:
3242: #-- <insert>
3243: sub start_insert {
3244: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3245: my $currentstring = '';
3246: if ($target eq 'web' || $target eq 'webgrade') {
3247: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3248: $currentstring .= '<b>'.$display.'</b>';;
3249: }
3250: return $currentstring;
3251: }
3252:
3253: sub end_insert {
3254: my ($target,$token) = @_;
3255: my $currentstring = '';
3256: if ($target eq 'web' || $target eq 'webgrade') {
3257: $currentstring .= '';
3258: }
3259: return $currentstring;
3260: }
3261:
3262: #-- <externallink>
3263: sub start_externallink {
3264: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3265: my $currentstring = '';
3266: if ($target eq 'web' || $target eq 'webgrade') {
3267: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3268: $currentstring .= '<b>'.$display.'</b>';;
3269: }
3270: return $currentstring;
3271: }
3272:
3273: sub end_externallink {
3274: my ($target,$token) = @_;
3275: my $currentstring = '';
3276: if ($target eq 'web' || $target eq 'webgrade') {
3277: $currentstring .= '';
3278: }
3279: return $currentstring;
3280: }
3281:
3282: #-- <blankspace heigth="">
3283: sub start_blankspace {
3284: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3285: my $currentstring = &end_p(); # closes off any unclosed <p>
3286: if ($target eq 'tex') {
3287: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3288: $currentstring .= '\vskip '.$howmuch.' ';
3289: }
3290: return $currentstring;
3291: }
3292:
3293: sub end_blankspace {
3294: my ($target,$token) = @_;
3295: my $currentstring = '';
3296: if ($target eq 'tex') {
3297: $currentstring .= '';
3298: }
3299: return $currentstring;
3300: }
3301:
3302: #-- <abbr> tag (end tag required)
3303: sub start_abbr {
3304: my ($target,$token) = @_;
3305: my $currentstring = '';
3306: if ($target eq 'web' || $target eq 'webgrade') {
3307: $currentstring = $token->[4];
3308: }
3309: return $currentstring;
3310: }
3311:
3312: sub end_abbr {
3313: my ($target,$token) = @_;
3314: my $currentstring = '';
3315: if ($target eq 'web' || $target eq 'webgrade') {
3316: $currentstring = $token->[2];
3317: }
3318: return $currentstring;
3319: }
3320:
3321: #-- <acronym> tag (end tag required)
3322: sub start_acronym {
3323: my ($target,$token) = @_;
3324: my $currentstring = '';
3325: if ($target eq 'web' || $target eq 'webgrade') {
3326: $currentstring = $token->[4];
3327: }
3328: return $currentstring;
3329: }
3330:
3331: sub end_acronym {
3332: my ($target,$token) = @_;
3333: my $currentstring = '';
3334: if ($target eq 'web' || $target eq 'webgrade') {
3335: $currentstring = $token->[2];
3336: }
3337: return $currentstring;
3338: }
3339:
3340: #-- <area> tag (end tag forbidden)
3341: sub start_area {
3342: my ($target,$token) = @_;
3343: my $currentstring = '';
3344: if ($target eq 'web' || $target eq 'webgrade') {
3345: $currentstring = $token->[4];
3346: }
3347: return $currentstring;
3348: }
3349:
3350: sub end_area {
3351: my ($target,$token) = @_;
3352: my $currentstring = '';
3353: if ($target eq 'web' || $target eq 'webgrade') {
3354: $currentstring = $token->[2];
3355: }
3356: return $currentstring;
3357: }
3358:
3359: #-- <base> tag (end tag forbidden)
3360: sub start_base {
3361: my ($target,$token) = @_;
3362: my $currentstring = '';
3363: if ($target eq 'web' || $target eq 'webgrade') {
3364: $currentstring = $token->[4];
3365: }
3366: return $currentstring;
3367: }
3368:
3369: sub end_base {
3370: my ($target,$token) = @_;
3371: my $currentstring = '';
3372: if ($target eq 'web' || $target eq 'webgrade') {
3373: $currentstring = $token->[2];
3374: }
3375: return $currentstring;
3376: }
3377:
3378: #-- <bdo> tag (end tag required)
3379: sub start_bdo {
3380: my ($target,$token) = @_;
3381: my $currentstring = '';
3382: if ($target eq 'web' || $target eq 'webgrade') {
3383: $currentstring = $token->[4];
3384: }
3385: return $currentstring;
3386: }
3387:
3388: sub end_bdo {
3389: my ($target,$token) = @_;
3390: my $currentstring = '';
3391: if ($target eq 'web' || $target eq 'webgrade') {
3392: $currentstring = $token->[2];
3393: }
3394: return $currentstring;
3395: }
3396:
3397: #-- <bgsound> tag (end tag optional)
3398: sub start_bgsound {
3399: my ($target,$token) = @_;
3400: my $currentstring = '';
3401: if ($target eq 'web' || $target eq 'webgrade') {
3402: $currentstring = $token->[4];
3403: }
3404: return $currentstring;
3405: }
3406:
3407: sub end_bgsound {
3408: my ($target,$token) = @_;
3409: my $currentstring = '';
3410: if ($target eq 'web' || $target eq 'webgrade') {
3411: $currentstring = $token->[2];
3412: }
3413: return $currentstring;
3414: }
3415:
3416: #-- <blink> tag (end tag required)
3417: sub start_blink {
3418: my ($target,$token) = @_;
3419: my $currentstring = '';
3420: if ($target eq 'web' || $target eq 'webgrade') {
3421: $currentstring = $token->[4];
3422: }
3423: return $currentstring;
3424: }
3425:
3426: sub end_blink {
3427: my ($target,$token) = @_;
3428: my $currentstring = '';
3429: if ($target eq 'web' || $target eq 'webgrade') {
3430: $currentstring = $token->[2];
3431: }
3432: return $currentstring;
3433: }
3434:
3435: #-- <blockquote> tag (end tag required)
3436: sub start_blockquote {
3437: my ($target,$token) = @_;
3438: my $currentstring = &end_p(); # Close any unclosed <p>
3439: if ($target eq 'web' || $target eq 'webgrade') {
3440: $currentstring .= $token->[4];
3441: }
3442: if ($target eq 'tex') {
3443: $currentstring .= '\begin{quote}';
3444: }
3445: return $currentstring;
3446: }
3447:
3448: sub end_blockquote {
3449: my ($target,$token) = @_;
3450: my $currentstring = '';
3451: if ($target eq 'web' || $target eq 'webgrade') {
3452: $currentstring = $token->[2];
3453: }
3454: if ($target eq 'tex') {
3455: $currentstring = '\end{quote}';
3456: }
3457: return $currentstring;
3458: }
3459:
3460: #-- <button> tag (end tag required)
3461: sub start_button {
3462: my ($target,$token) = @_;
3463: my $currentstring = '';
3464: if ($target eq 'web' || $target eq 'webgrade') {
3465: $currentstring = $token->[4];
3466: }
3467: return $currentstring;
3468: }
3469:
3470: sub end_button {
3471: my ($target,$token) = @_;
3472: my $currentstring = '';
3473: if ($target eq 'web' || $target eq 'webgrade') {
3474: $currentstring = $token->[2];
3475: }
3476: return $currentstring;
3477: }
3478:
3479: #-- <caption> tag (end tag required)
3480: sub start_caption {
3481: my ($target,$token) = @_;
3482: my $currentstring = '';
3483: if ($target eq 'web' || $target eq 'webgrade') {
3484: $currentstring = $token->[4];
3485: }
3486: return $currentstring;
3487: }
3488:
3489: sub end_caption {
3490: my ($target,$token) = @_;
3491: my $currentstring = '';
3492: if ($target eq 'web' || $target eq 'webgrade') {
3493: $currentstring = $token->[2];
3494: }
3495: return $currentstring;
3496: }
3497:
3498: #-- <col> tag (end tag forbdden)
3499: sub start_col {
3500: my ($target,$token) = @_;
3501: my $currentstring = '';
3502: if ($target eq 'web' || $target eq 'webgrade') {
3503: $currentstring = $token->[4];
3504: }
3505: return $currentstring;
3506: }
3507:
3508: sub end_col {
3509: my ($target,$token) = @_;
3510: my $currentstring = '';
3511: if ($target eq 'web' || $target eq 'webgrade') {
3512: $currentstring = $token->[2];
3513: }
3514: return $currentstring;
3515: }
3516:
3517: #-- <colgroup> tag (end tag optional)
3518: sub start_colgroup {
3519: my ($target,$token) = @_;
3520: my $currentstring = '';
3521: if ($target eq 'web' || $target eq 'webgrade') {
3522: $currentstring = $token->[4];
3523: }
3524: return $currentstring;
3525: }
3526:
3527: sub end_colgroup {
3528: my ($target,$token) = @_;
3529: my $currentstring = '';
3530: if ($target eq 'web' || $target eq 'webgrade') {
3531: $currentstring = $token->[2];
3532: }
3533: return $currentstring;
3534: }
3535:
3536: #-- <del> tag (end tag required)
3537: sub start_del {
3538: my ($target,$token) = @_;
3539: my $currentstring = '';
3540: if ($target eq 'web' || $target eq 'webgrade') {
3541: $currentstring = $token->[4];
3542: }
3543: return $currentstring;
3544: }
3545:
3546: sub end_del {
3547: my ($target,$token) = @_;
3548: my $currentstring = '';
3549: if ($target eq 'web' || $target eq 'webgrade') {
3550: $currentstring = $token->[2];
3551: }
3552: return $currentstring;
3553: }
3554:
3555: #-- <fieldset> tag (end tag required)
3556: sub start_fieldset {
3557: my ($target,$token) = @_;
3558: my $currentstring = '';
3559: if ($target eq 'web' || $target eq 'webgrade') {
3560: $currentstring = $token->[4];
3561: }
3562: return $currentstring;
3563: }
3564:
3565: sub end_fieldset {
3566: my ($target,$token) = @_;
3567: my $currentstring = '';
3568: if ($target eq 'web' || $target eq 'webgrade') {
3569: $currentstring = $token->[2];
3570: }
3571: return $currentstring;
3572: }
3573:
3574: #-- <frame> tag (end tag forbidden)
3575: sub start_frame {
3576: my ($target,$token) = @_;
3577: my $currentstring = '';
3578: if ($target eq 'web' || $target eq 'webgrade') {
3579: $currentstring = $token->[4];
3580: }
3581: return $currentstring;
3582: }
3583:
3584: sub end_frame {
3585: my ($target,$token) = @_;
3586: my $currentstring = '';
3587: if ($target eq 'web' || $target eq 'webgrade') {
3588: $currentstring = $token->[2];
3589: }
3590: return $currentstring;
3591: }
3592:
3593: #-- <iframe> tag (end tag required)
3594: sub start_iframe {
3595: my ($target,$token) = @_;
3596: my $currentstring = '';
3597: if ($target eq 'web' || $target eq 'webgrade') {
3598: $currentstring = $token->[4];
3599: }
3600: return $currentstring;
3601: }
3602:
3603: sub end_iframe {
3604: my ($target,$token) = @_;
3605: my $currentstring = '';
3606: if ($target eq 'web' || $target eq 'webgrade') {
3607: $currentstring = $token->[2];
3608: }
3609: return $currentstring;
3610: }
3611:
3612: #-- <ins> tag (end tag required)
3613: sub start_ins {
3614: my ($target,$token) = @_;
3615: my $currentstring = '';
3616: if ($target eq 'web' || $target eq 'webgrade') {
3617: $currentstring = $token->[4];
3618: }
3619: return $currentstring;
3620: }
3621:
3622: sub end_ins {
3623: my ($target,$token) = @_;
3624: my $currentstring = '';
3625: if ($target eq 'web' || $target eq 'webgrade') {
3626: $currentstring = $token->[2];
3627: }
3628: return $currentstring;
3629: }
3630:
3631: #-- <isindex> tag (end tag forbidden)
3632: sub start_isindex {
3633: my ($target,$token) = @_;
3634: my $currentstring = '';
3635: if ($target eq 'web' || $target eq 'webgrade') {
3636: $currentstring = $token->[4];
3637: }
3638: return $currentstring;
3639: }
3640:
3641: sub end_isindex {
3642: my ($target,$token) = @_;
3643: my $currentstring = '';
3644: if ($target eq 'web' || $target eq 'webgrade') {
3645: $currentstring = $token->[2];
3646: }
3647: return $currentstring;
3648: }
3649:
3650: #-- <keygen> tag (end tag forbidden)
3651: sub start_keygen {
3652: my ($target,$token) = @_;
3653: my $currentstring = '';
3654: if ($target eq 'web' || $target eq 'webgrade') {
3655: $currentstring = $token->[4];
3656: }
3657: return $currentstring;
3658: }
3659:
3660: sub end_keygen {
3661: my ($target,$token) = @_;
3662: my $currentstring = '';
3663: if ($target eq 'web' || $target eq 'webgrade') {
3664: $currentstring = $token->[2];
3665: }
3666: return $currentstring;
3667: }
3668:
3669: #-- <label> tag
3670: sub start_label {
3671: my ($target,$token) = @_;
3672: my $currentstring = '';
3673: if ($target eq 'web' || $target eq 'webgrade') {
3674: $currentstring = $token->[4];
3675: }
3676: return $currentstring;
3677: }
3678:
3679: sub end_label {
3680: my ($target,$token) = @_;
3681: my $currentstring = '';
3682: if ($target eq 'web' || $target eq 'webgrade') {
3683: $currentstring = $token->[2];
3684: }
3685: return $currentstring;
3686: }
3687:
3688: #-- <layer> tag (end tag required)
3689: sub start_layer {
3690: my ($target,$token) = @_;
3691: my $currentstring = '';
3692: if ($target eq 'web' || $target eq 'webgrade') {
3693: $currentstring = $token->[4];
3694: }
3695: return $currentstring;
3696: }
3697:
3698: sub end_layer {
3699: my ($target,$token) = @_;
3700: my $currentstring = '';
3701: if ($target eq 'web' || $target eq 'webgrade') {
3702: $currentstring = $token->[2];
3703: }
3704: return $currentstring;
3705: }
3706:
3707: #-- <legend> tag (end tag required)
3708: sub start_legend {
3709: my ($target,$token) = @_;
3710: my $currentstring = '';
3711: if ($target eq 'web' || $target eq 'webgrade') {
3712: $currentstring = $token->[4];
3713: }
3714: return $currentstring;
3715: }
3716:
3717: sub end_legend {
3718: my ($target,$token) = @_;
3719: my $currentstring = '';
3720: if ($target eq 'web' || $target eq 'webgrade') {
3721: $currentstring = $token->[2];
3722: }
3723: return $currentstring;
3724: }
3725:
3726: #-- <link> tag (end tag forbidden)
3727: sub start_link {
3728: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3729: my $currentstring = '';
3730: if ($target eq 'web' || $target eq 'webgrade') {
3731: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3732: undef,1);
3733: &Apache::lonxml::extlink($href);
3734: $currentstring = $token->[4];
3735: }
3736: return $currentstring;
3737: }
3738:
3739: sub end_link {
3740: my ($target,$token) = @_;
3741: my $currentstring = '';
3742: if ($target eq 'web' || $target eq 'webgrade') {
3743: $currentstring = $token->[2];
3744: }
3745: return $currentstring;
3746: }
3747:
3748: #-- <marquee> tag (end tag optional)
3749: sub start_marquee {
3750: my ($target,$token) = @_;
3751: my $currentstring = '';
3752: if ($target eq 'web' || $target eq 'webgrade') {
3753: $currentstring = $token->[4];
3754: }
3755: return $currentstring;
3756: }
3757:
3758: sub end_marquee {
3759: my ($target,$token) = @_;
3760: my $currentstring = '';
3761: if ($target eq 'web' || $target eq 'webgrade') {
3762: $currentstring = $token->[2];
3763: }
3764: return $currentstring;
3765: }
3766:
3767: #-- <multicol> tag (end tag required)
3768: sub start_multicol {
3769: my ($target,$token) = @_;
3770: my $currentstring = &end_p(); # Close any pending <p>
3771: if ($target eq 'web' || $target eq 'webgrade') {
3772: $currentstring .= $token->[4];
3773: }
3774: return $currentstring;
3775: }
3776:
3777: sub end_multicol {
3778: my ($target,$token) = @_;
3779: my $currentstring = '';
3780: if ($target eq 'web' || $target eq 'webgrade') {
3781: $currentstring = $token->[2];
3782: }
3783: return $currentstring;
3784: }
3785:
3786: #-- <nobr> tag (end tag required)
3787: sub start_nobr {
3788: my ($target,$token) = @_;
3789: my $currentstring = '';
3790: if ($target eq 'web' || $target eq 'webgrade') {
3791: $currentstring = $token->[4];
3792: } elsif ($target eq 'tex') {
3793: $currentstring='\mbox{';
3794: }
3795: return $currentstring;
3796: }
3797:
3798: sub end_nobr {
3799: my ($target,$token) = @_;
3800: my $currentstring = '';
3801: if ($target eq 'web' || $target eq 'webgrade') {
3802: $currentstring = $token->[2];
3803: } elsif ($target eq 'tex') {
3804: $currentstring='}';
3805: }
3806: return $currentstring;
3807: }
3808:
3809: #-- <noembed> tag (end tag required)
3810: sub start_noembed {
3811: my ($target,$token) = @_;
3812: my $currentstring = '';
3813: if ($target eq 'web' || $target eq 'webgrade') {
3814: $currentstring = $token->[4];
3815: }
3816: return $currentstring;
3817: }
3818:
3819: sub end_noembed {
3820: my ($target,$token) = @_;
3821: my $currentstring = '';
3822: if ($target eq 'web' || $target eq 'webgrade') {
3823: $currentstring = $token->[2];
3824: }
3825: return $currentstring;
3826: }
3827:
3828: #-- <noframes> tag (end tag required)
3829: sub start_noframes {
3830: my ($target,$token) = @_;
3831: my $currentstring = '';
3832: if ($target eq 'web' || $target eq 'webgrade') {
3833: $currentstring = $token->[4];
3834: }
3835: return $currentstring;
3836: }
3837:
3838: sub end_noframes {
3839: my ($target,$token) = @_;
3840: my $currentstring = '';
3841: if ($target eq 'web' || $target eq 'webgrade') {
3842: $currentstring = $token->[2];
3843: }
3844: return $currentstring;
3845: }
3846:
3847: #-- <nolayer> tag (end tag required)
3848: sub start_nolayer {
3849: my ($target,$token) = @_;
3850: my $currentstring = '';
3851: if ($target eq 'web' || $target eq 'webgrade') {
3852: $currentstring = $token->[4];
3853: }
3854: return $currentstring;
3855: }
3856:
3857: sub end_nolayer {
3858: my ($target,$token) = @_;
3859: my $currentstring = '';
3860: if ($target eq 'web' || $target eq 'webgrade') {
3861: $currentstring = $token->[2];
3862: }
3863: return $currentstring;
3864: }
3865:
3866: #-- <noscript> tag (end tag required)
3867: sub start_noscript {
3868: my ($target,$token) = @_;
3869: my $currentstring = '';
3870: if ($target eq 'web' || $target eq 'webgrade') {
3871: $currentstring = $token->[4];
3872: }
3873: return $currentstring;
3874: }
3875:
3876: sub end_noscript {
3877: my ($target,$token) = @_;
3878: my $currentstring = '';
3879: if ($target eq 'web' || $target eq 'webgrade') {
3880: $currentstring = $token->[2];
3881: }
3882: return $currentstring;
3883: }
3884:
3885: #-- <object> tag (end tag required)
3886: sub start_object {
3887: my ($target,$token) = @_;
3888: my $currentstring = '';
3889: if ($target eq 'web' || $target eq 'webgrade') {
3890: $currentstring = $token->[4];
3891: }
3892: return $currentstring;
3893: }
3894:
3895: sub end_object {
3896: my ($target,$token) = @_;
3897: my $currentstring = '';
3898: if ($target eq 'web' || $target eq 'webgrade') {
3899: $currentstring = $token->[2];
3900: }
3901: return $currentstring;
3902: }
3903:
3904: #-- <optgroup> tag (end tag required)
3905: sub start_optgroup {
3906: my ($target,$token) = @_;
3907: my $currentstring = '';
3908: if ($target eq 'web' || $target eq 'webgrade') {
3909: $currentstring = $token->[4];
3910: }
3911: return $currentstring;
3912: }
3913:
3914: sub end_optgroup {
3915: my ($target,$token) = @_;
3916: my $currentstring = '';
3917: if ($target eq 'web' || $target eq 'webgrade') {
3918: $currentstring = $token->[2];
3919: }
3920: return $currentstring;
3921: }
3922:
3923: #-- <samp> tag (end tag required)
3924: sub start_samp {
3925: my ($target,$token) = @_;
3926: my $currentstring = '';
3927: if ($target eq 'web' || $target eq 'webgrade') {
3928: $currentstring = $token->[4];
3929: } elsif ($target eq 'tex') {
3930: $currentstring='\texttt{';
3931: }
3932: return $currentstring;
3933: }
3934:
3935: sub end_samp {
3936: my ($target,$token) = @_;
3937: my $currentstring = '';
3938: if ($target eq 'web' || $target eq 'webgrade') {
3939: $currentstring = $token->[2];
3940: } elsif ($target eq 'tex') {
3941: $currentstring='}';
3942: }
3943: return $currentstring;
3944: }
3945:
3946: #-- <server> tag
3947: sub start_server {
3948: my ($target,$token) = @_;
3949: my $currentstring = '';
3950: if ($target eq 'web' || $target eq 'webgrade') {
3951: $currentstring = $token->[4];
3952: }
3953: return $currentstring;
3954: }
3955:
3956: sub end_server {
3957: my ($target,$token) = @_;
3958: my $currentstring = '';
3959: if ($target eq 'web' || $target eq 'webgrade') {
3960: $currentstring = $token->[2];
3961: }
3962: return $currentstring;
3963: }
3964:
3965: #-- <spacer> tag (end tag forbidden)
3966: sub start_spacer {
3967: my ($target,$token) = @_;
3968: my $currentstring = &end_p(); # Close off any open <p> tag.
3969: if ($target eq 'web' || $target eq 'webgrade') {
3970: $currentstring .= $token->[4];
3971: }
3972: return $currentstring;
3973: }
3974:
3975: sub end_spacer {
3976: my ($target,$token) = @_;
3977: my $currentstring = '';
3978: if ($target eq 'web' || $target eq 'webgrade') {
3979: $currentstring = $token->[2];
3980: }
3981: return $currentstring;
3982: }
3983:
3984: #-- <span> tag (end tag required)
3985: sub start_span {
3986: my ($target,$token) = @_;
3987: my $currentstring = '';
3988: if ($target eq 'web' || $target eq 'webgrade') {
3989: $currentstring = $token->[4];
3990: }
3991: return $currentstring;
3992: }
3993:
3994: sub end_span {
3995: my ($target,$token) = @_;
3996: my $currentstring = '';
3997: if ($target eq 'web' || $target eq 'webgrade') {
3998: $currentstring = $token->[2];
3999: }
4000: return $currentstring;
4001: }
4002:
4003: #-- <tbody> tag (end tag optional)
4004: sub start_tbody {
4005: my ($target,$token) = @_;
4006: my $currentstring = '';
4007: if ($target eq 'web' || $target eq 'webgrade') {
4008: $currentstring = $token->[4];
4009: }
4010: return $currentstring;
4011: }
4012:
4013: sub end_tbody {
4014: my ($target,$token) = @_;
4015: my $currentstring = '';
4016: if ($target eq 'web' || $target eq 'webgrade') {
4017: $currentstring = $token->[2];
4018: }
4019: return $currentstring;
4020: }
4021:
4022: #-- <tfoot> tag (end tag optional)
4023: sub start_tfoot {
4024: my ($target,$token) = @_;
4025: my $currentstring = '';
4026: if ($target eq 'web' || $target eq 'webgrade') {
4027: $currentstring = $token->[4];
4028: }
4029: return $currentstring;
4030: }
4031:
4032: sub end_tfoot {
4033: my ($target,$token) = @_;
4034: my $currentstring = '';
4035: if ($target eq 'web' || $target eq 'webgrade') {
4036: $currentstring = $token->[2];
4037: }
4038: return $currentstring;
4039: }
4040:
4041: #-- <thead> tag (end tag optional)
4042: sub start_thead {
4043: my ($target,$token) = @_;
4044: my $currentstring = '';
4045: if ($target eq 'web' || $target eq 'webgrade') {
4046: $currentstring = $token->[4];
4047: }
4048: return $currentstring;
4049: }
4050:
4051: sub end_thead {
4052: my ($target,$token) = @_;
4053: my $currentstring = '';
4054: if ($target eq 'web' || $target eq 'webgrade') {
4055: $currentstring = $token->[2];
4056: }
4057: return $currentstring;
4058: }
4059:
4060: #-- <var> tag
4061: sub start_var {
4062: my ($target,$token) = @_;
4063: my $currentstring = '';
4064: if ($target eq 'web' || $target eq 'webgrade') {
4065: $currentstring = $token->[4];
4066: } elsif ($target eq 'tex') {
4067: $currentstring = '\textit{';
4068: }
4069: return $currentstring;
4070: }
4071:
4072: sub end_var {
4073: my ($target,$token) = @_;
4074: my $currentstring = '';
4075: if ($target eq 'web' || $target eq 'webgrade') {
4076: $currentstring = $token->[2];
4077: } elsif ($target eq 'tex') {
4078: $currentstring = '}';
4079: }
4080: return $currentstring;
4081: }
4082:
4083: #-- <wbr> tag (end tag forbidden)
4084: sub start_wbr {
4085: my ($target,$token) = @_;
4086: my $currentstring = '';
4087: if ($target eq 'web' || $target eq 'webgrade') {
4088: $currentstring = $token->[4];
4089: }
4090: return $currentstring;
4091: }
4092:
4093: sub end_wbr {
4094: my ($target,$token) = @_;
4095: my $currentstring = '';
4096: if ($target eq 'web' || $target eq 'webgrade') {
4097: $currentstring = $token->[2];
4098: }
4099: return $currentstring;
4100: }
4101:
4102: #-- <hideweboutput> tag
4103: sub start_hideweboutput {
4104: my ($target,$token) = @_;
4105: if ($target eq 'web' || $target eq 'webgrade') {
4106: &Apache::lonxml::startredirection();
4107: }
4108: return '';
4109: }
4110:
4111: sub end_hideweboutput {
4112: my ($target,$token) = @_;
4113: my $currentstring = '';
4114: if ($target eq 'web' || $target eq 'webgrade') {
4115: $currentstring = &Apache::lonxml::endredirection();
4116: }
4117: return '';
4118: }
4119:
4120:
4121: sub image_replication {
4122: my $src = shift;
4123: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4124: #replicates eps or ps
4125: my $epssrc = my $pssrc = $src;
4126: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4127: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4128: if (not -e $epssrc && not -e $pssrc) {
4129: my $result=&Apache::lonnet::repcopy($epssrc);
4130: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4131: }
4132: return '';
4133: }
4134: #
4135: # Get correct sizing parameter for an image given
4136: # it's initial ht. and wid. This allows sizing of
4137: # images that are generated on-the-fly (e.g. gnuplot)
4138: # as well as serving as a utility for image_size.
4139: #
4140: # Parameter:
4141: # height_param
4142: # width_param - Initial picture dimensions.
4143: # scaling - A scale factor.
4144: # parstack, - the current stack of tag attributes
4145: # from the xml parser
4146: # safeeval, - pointer to the safespace
4147: # depth, - from what level in the stack to look for attributes
4148: # (assumes -1 if unspecified)
4149: # cis - look for attrubutes case insensitively
4150: # (assumes false)
4151: #
4152: # Returns:
4153: # height, width - new dimensions.
4154: #
4155: sub resize_image {
4156: my ($height_param, $width_param, $scaling,
4157: $parstack, $safeeval, $depth, $cis) = @_;
4158:
4159: # First apply the scaling...
4160:
4161: $height_param = $height_param * $scaling;
4162: $width_param = $width_param * $scaling;
4163:
4164: #do we have any specified LaTeX size of the picture?
4165: my $toget='TeXwidth';
4166: if ($cis) {
4167: $toget=lc($toget);
4168: }
4169: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4170: $safeeval,$depth,$cis);
4171: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4172: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4173: $safeeval,$depth,$cis);
4174: #do we have any specified web size of the picture?
4175: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4176: $depth,1);
4177: if ($TeXwidth) {
4178: my $old_width_param=$width_param;
4179: if ($TeXwidth=~/(\d+)\s*\%/) {
4180: $width_param = $1*$env{'form.textwidth'}/100;
4181: } else {
4182: $width_param = $TeXwidth;
4183: }
4184: if ($TeXheight) {
4185: $height_param = $TeXheight;
4186: } elsif ($old_width_param) {
4187: $height_param=$TeXwidth/$old_width_param*$height_param;
4188: }
4189: } elsif ($TeXheight) {
4190: $height_param = $TeXheight;
4191: if ($height_param) {
4192: $width_param = $TeXheight/$height_param*$width_param;
4193: }
4194: } elsif ($width) {
4195: my $old_width_param=$width_param;
4196: $width_param = $width*$scaling;
4197: if ($old_width_param) {
4198: $height_param=$width_param/$old_width_param*$height_param;
4199: }
4200: }
4201: if ($width_param > $env{'form.textwidth'}) {
4202: my $old_width_param=$width_param;
4203: $width_param =0.95*$env{'form.textwidth'};
4204: if ($old_width_param) {
4205: $height_param=$width_param/$old_width_param*$height_param;
4206: }
4207: }
4208:
4209: return ($height_param, $width_param);
4210: }
4211:
4212: sub image_size {
4213: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4214:
4215: #size of image from gif/jpg/jpeg/png
4216: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4217: if (-e $ressrc) {
4218: $src = $ressrc;
4219: }
4220: my $image = Image::Magick->new;
4221: my $current_figure = $image->Read($src);
4222: my $width_param = $image->Get('width');
4223: my $height_param = $image->Get('height');
4224: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4225: undef($image);
4226:
4227: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4228: $scaling, $parstack, $safeeval,
4229: $depth, $cis);
4230:
4231: return ($height_param, $width_param);
4232: }
4233:
4234: sub image_width {
4235: my ($height, $width) = &image_size(@_);
4236: return $width;
4237: }
4238: # Not yet 100% sure this is correct in all circumstances..
4239: # due to my uncertainty about mods to image_size.
4240: #
4241: sub image_height {
4242: my ($height, $width) = &image_size(@_);
4243: return $height;
4244: }
4245:
4246: sub get_eps_image {
4247: my ($src)=@_;
4248: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4249:
4250: # In order to prevent the substitution of the alt text, we need to
4251: # be sure the orig_src file is on system now so:
4252:
4253: if (! -e $orig_src) {
4254: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4255: }
4256: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4257: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4258: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4259: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4260: &Apache::lonxml::debug("Filelocation gives: $src");
4261: if (! -e $src) {
4262: &Apache::lonxml::debug("$src does not exist");
4263: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4264: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4265: #if replication failed try to find ps file
4266: $src=~s/\.eps$/\.ps/;
4267: &Apache::lonxml::debug("Now looking for $src");
4268: #if no ps file try to replicate it.
4269: my $didrepcopy = &Apache::lonnet::repcopy($src);
4270: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4271: if ( (not -e $src) ||
4272: ($didrepcopy ne 'ok')) {
4273: &Apache::lonxml::debug("Failed to find or replicate $src");
4274:
4275: #if replication failed try to produce eps file dynamically
4276: $src=~s/\.ps$/\.eps/;
4277: my $temp_file;
4278: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4279: my $newsrc=$orig_src;
4280: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4281: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4282: print FILE ("$newsrc\n");
4283: close(FILE);
4284: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4285: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4286: if ($sext ne "") { # Put the ext. back in to uniquify.
4287: $src =~ s/\.eps$/$sext.eps/;
4288: }
4289:
4290: }
4291:
4292: }
4293: } else {
4294: # If the postscript file has spaces in its name,
4295: # LaTeX will gratuitiously vomit. Therefore
4296: # queue such files for copy with " " replaced by "_".
4297: # printout.pm will know them by their .ps or .eps extensions.
4298: my $newsrc = $orig_src;
4299: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4300: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4301: print FILE "$src\n";
4302: close FILE;
4303: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4304: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4305: }
4306: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4307: $path =~ s/ /\_/g;
4308: $file =~ s/ /\_/g;
4309: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4310: return ($path.'/',$file);
4311: }
4312:
4313: sub eps_generation {
4314: my ($src,$file,$width_param) = @_;
4315: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4316: my $temp_file = Apache::File->new('>>'.$filename);
4317: print $temp_file "$src\n";
4318: my $newsrc = $src;
4319: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4320: $newsrc=~s{/home/httpd/html/res}{};
4321: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4322: $newsrc=~s{/\./}{/};
4323: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4324: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4325: $newsrc=~s{/home/httpd/lonUsers}{};
4326: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4327: }
4328: if ($newsrc=~m{/userfiles/}) {
4329: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4330: } else {
4331: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4332: }
4333: }
4334:
4335: sub file_path {
4336: my $src=shift;
4337: my ($file,$path);
4338: if ($src =~ m!(.*)/([^/]*)$!) {
4339: $file = $2;
4340: $path = $1.'/';
4341: }
4342: return $file,$path;
4343: }
4344: # Converts a measurement in to mm from any of
4345: # the other valid LaTeX units of measure.
4346: # If the units of measure are missing from the
4347: # parameter, it is assumed to be in and returned
4348: # with mm units of measure
4349: sub recalc {
4350: my $argument = shift;
4351: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4352: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4353: my $value=$1;
4354: my $units=$2;
4355: if ($units eq 'cm') {
4356: $value*=10;
4357: } elsif ($units eq 'in') {
4358: $value*=25.4;
4359: } elsif ($units eq 'pc') {
4360: $value*=(25.4*12/72.27);
4361: } elsif ($units eq 'pt') {
4362: $value*=(25.4/72.27);
4363: }
4364: return $value.' mm';
4365: }
4366:
4367: sub LATEX_length {
4368: my $garbage=shift;
4369: $garbage=~s/^\s+$//;
4370: $garbage=~s/^\s+(\S.*)/$1/;#space before
4371: $garbage=~s/(.*\S)\s+$/$1/;#space after
4372: $garbage=~s/(\s)+/$1/;#only one space
4373: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4374: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4375: $garbage=~s/([^\\])\$/$1/g;#$
4376: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4377: $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;
4378: $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;
4379: $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;
4380: $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;
4381: $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;
4382: $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;
4383: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4384: #remove some other LaTeX command
4385: $garbage=~s|\\(\w+)\\|\\|g;
4386: $garbage=~s|\\(\w+)(\s*)|$2|g;
4387: $garbage=~s|\+|11|g;
4388: my $value=length($garbage);
4389: return $value;
4390: }
4391:
4392:
4393: # is_inside_of $tagstack $tag
4394: # This sub returns true if the current state of Xml processing
4395: # is inside of the tag.
4396: # Parameters:
4397: # tagstack - The tagstack from the parser.
4398: # tag - The tag (without the <>'s.).
4399: # Sample usage:
4400: # if (is_inside_of($tagstack "table")) {
4401: # # I'm in a table....
4402: # }
4403: sub is_inside_of {
4404: my ($tagstack, $tag) = @_;
4405: my @stack = @$tagstack;
4406: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4407: if ($stack[$i] eq $tag) {
4408: return 1;
4409: }
4410: }
4411: return 0;
4412: }
4413:
4414:
4415: 1;
4416: __END__
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