1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.355 2007/02/27 23:44:53 foxr Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: use 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: } else {
1231: $currentstring .= '\strut \\\\ \strut ';
1232: }
1233:
1234: }
1235: return $currentstring;
1236: }
1237:
1238: sub end_br {
1239: my ($target,$token) = @_;
1240: my $currentstring = '';
1241: if ($target eq 'web' || $target eq 'webgrade') {
1242: $currentstring .= $token->[2];
1243: }
1244: return $currentstring;
1245: }
1246:
1247: #-- <big> tag (end tag required)
1248: sub start_big {
1249: my ($target,$token) = @_;
1250: my $currentstring = '';
1251: if ($target eq 'web' || $target eq 'webgrade') {
1252: $currentstring .= $token->[4];
1253: } elsif ($target eq 'tex') {
1254: $currentstring .= '{\large ';
1255: }
1256: return $currentstring;
1257: }
1258:
1259: sub end_big {
1260: my ($target,$token) = @_;
1261: my $currentstring = '';
1262: if ($target eq 'web' || $target eq 'webgrade') {
1263: $currentstring .= $token->[2];
1264: } elsif ($target eq 'tex') {
1265: $currentstring .= '}';
1266: }
1267: return $currentstring;
1268: }
1269:
1270: #-- <small> tag (end tag required)
1271: sub start_small {
1272: my ($target,$token) = @_;
1273: my $currentstring = '';
1274: if ($target eq 'web' || $target eq 'webgrade') {
1275: $currentstring .= $token->[4];
1276: } elsif ($target eq 'tex') {
1277: $currentstring .= '{\footnotesize ';
1278: }
1279: return $currentstring;
1280: }
1281:
1282: sub end_small {
1283: my ($target,$token) = @_;
1284: my $currentstring = '';
1285: if ($target eq 'web' || $target eq 'webgrade') {
1286: $currentstring .= $token->[2];
1287: } elsif ($target eq 'tex') {
1288: $currentstring .= '}';
1289: }
1290: return $currentstring;
1291: }
1292:
1293: #-- <basefont> tag (end tag forbidden)
1294: sub start_basefont {
1295: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1296: my $currentstring = '';
1297: if ($target eq 'web' || $target eq 'webgrade') {
1298: $currentstring = $token->[4];
1299: } elsif ($target eq 'tex') {
1300: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1301: if (defined $basesize) {
1302: $currentstring = '{\\'.$basesize.' ';
1303: }
1304: }
1305: return $currentstring;
1306: }
1307:
1308: sub end_basefont {
1309: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1310: my $currentstring = '';
1311: if ($target eq 'web' || $target eq 'webgrade') {
1312: $currentstring = $token->[4];
1313: } elsif ($target eq 'tex') {
1314: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1315: if (defined $basesize) {
1316: $currentstring = '}';
1317: }
1318: }
1319: return $currentstring;
1320: }
1321:
1322: #-- <font> tag (end tag required)
1323: sub start_font {
1324: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1325: my $currentstring = '';
1326: if ($target eq 'web' || $target eq 'webgrade') {
1327: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1328: if ($face!~/symbol/i) {
1329: if (($env{'browser.fontenhance'} eq 'on') ||
1330: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1331: }
1332: $currentstring = $token->[4];
1333: } elsif ($target eq 'tex') {
1334: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1335: if (defined $fontsize) {
1336: $currentstring = '{\\'.$fontsize.' ';
1337: }
1338: }
1339: return $currentstring;
1340: }
1341:
1342: sub end_font {
1343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1344: my $currentstring = '';
1345: if ($target eq 'web' || $target eq 'webgrade') {
1346: $currentstring = $token->[2];
1347: } elsif ($target eq 'tex') {
1348: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1349: if (defined $fontsize) {
1350: $currentstring = '}';
1351: }
1352: }
1353: return $currentstring;
1354: }
1355:
1356: #-- <strike> tag (end tag required)
1357: sub start_strike {
1358: my ($target,$token) = @_;
1359: my $currentstring = '';
1360: if ($target eq 'web' || $target eq 'webgrade') {
1361: $currentstring .= $token->[4];
1362: } elsif ($target eq 'tex') {
1363: &Apache::lonxml::startredirection();
1364: }
1365: return $currentstring;
1366: }
1367:
1368: sub end_strike {
1369: my ($target,$token) = @_;
1370: my $currentstring = '';
1371: if ($target eq 'web' || $target eq 'webgrade') {
1372: $currentstring .= $token->[2];
1373: } elsif ($target eq 'tex') {
1374: $currentstring=&Apache::lonxml::endredirection();
1375: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1376: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1377: $currentstring=~s/(\S)\s*$/$1\}/;
1378: }
1379: return $currentstring;
1380: }
1381:
1382: #-- <s> tag (end tag required)
1383: sub start_s {
1384: my ($target,$token) = @_;
1385: my $currentstring = '';
1386: if ($target eq 'web' || $target eq 'webgrade') {
1387: $currentstring .= $token->[4];
1388: } elsif ($target eq 'tex') {
1389: &Apache::lonxml::startredirection();
1390: }
1391: return $currentstring;
1392: }
1393:
1394: sub end_s {
1395: my ($target,$token) = @_;
1396: my $currentstring = '';
1397: if ($target eq 'web' || $target eq 'webgrade') {
1398: $currentstring .= $token->[2];
1399: } elsif ($target eq 'tex') {
1400: $currentstring=&Apache::lonxml::endredirection();
1401: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1402: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1403: $currentstring=~s/(\S)\s*$/$1\}/;
1404: }
1405: return $currentstring;
1406: }
1407:
1408: #-- <sub> tag (end tag required)
1409: sub start_sub {
1410: my ($target,$token) = @_;
1411: my $currentstring = '';
1412: if ($target eq 'web' || $target eq 'webgrade') {
1413: $currentstring .= $token->[4];
1414: } elsif ($target eq 'tex') {
1415: $currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
1416: }
1417: return $currentstring;
1418: }
1419:
1420: sub end_sub {
1421: my ($target,$token) = @_;
1422: my $currentstring = '';
1423: if ($target eq 'web' || $target eq 'webgrade') {
1424: $currentstring .= $token->[2];
1425: } elsif ($target eq 'tex') {
1426: $currentstring .= '}}';
1427: }
1428: return $currentstring;
1429: }
1430:
1431: #-- <sup> tag (end tag required)
1432: sub start_sup {
1433: my ($target,$token) = @_;
1434: my $currentstring = '';
1435: if ($target eq 'web' || $target eq 'webgrade') {
1436: $currentstring .= $token->[4];
1437: } elsif ($target eq 'tex') {
1438: $currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
1439: }
1440: return $currentstring;
1441: }
1442:
1443: sub end_sup {
1444: my ($target,$token) = @_;
1445: my $currentstring = '';
1446: if ($target eq 'web' || $target eq 'webgrade') {
1447: $currentstring .= $token->[2];
1448: } elsif ($target eq 'tex') {
1449: $currentstring .= '}}';
1450: }
1451: return $currentstring;
1452: }
1453:
1454: #-- <hr> tag (end tag forbidden)
1455: sub start_hr {
1456: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1457: my $currentstring = &end_p(); # End enclosing para.
1458: if ($target eq 'web' || $target eq 'webgrade') {
1459: $currentstring .= $token->[4];
1460: } elsif ($target eq 'tex') {
1461: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1462: if (defined $LaTeXwidth) {
1463: if ($LaTeXwidth=~/^%/) {
1464: substr($LaTeXwidth,0,1)='';
1465: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1466: }
1467: } else {
1468: $LaTeXwidth ='0.9\textwidth';
1469: }
1470: my ($pre,$post);
1471: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1472: if (($align eq 'center') || (not defined $align)) {
1473: $pre=''; $post='';
1474: } elsif ($align eq 'left') {
1475: $pre='\rlap{'; $post='} \hfill';
1476: } elsif ($align eq 'right') {
1477: $pre=' \hfill \llap{'; $post='}';
1478: }
1479: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1480: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1481: }
1482: return $currentstring;
1483: }
1484:
1485: sub end_hr {
1486: my ($target,$token) = @_;
1487: my $currentstring = '';
1488: if ($target eq 'web' || $target eq 'webgrade') {
1489: $currentstring .= $token->[2];
1490: }
1491: return $currentstring;
1492: }
1493:
1494: #-- <div> tag (end tag required)
1495: {
1496:
1497: # Since div can be nested, the stack below is used
1498: # in 'tex' mode to store the ending strings
1499: # for the div stack.
1500:
1501: my @div_end_stack;
1502:
1503: sub start_div {
1504: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1505: my $currentstring = &end_p(); # Close enclosing para.
1506: if ($target eq 'web' || $target eq 'webgrade') {
1507: $currentstring .= $token->[4];
1508: }
1509: if ($target eq 'tex') {
1510: # 4 possible alignments: left, right, center, and -missing-.
1511:
1512: my $endstring = '';
1513:
1514: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1515: $safeeval, undef, 1));
1516: if ($align eq 'center') {
1517: $currentstring .= '\begin{center}';
1518: $endstring = '\end{center}';
1519: if (&is_inside_of($tagstack, "table")) {
1520: $currentstring = ¢er_correction().$currentstring;
1521: }
1522: }
1523: elsif ($align eq 'right') {
1524: $currentstring .= '\begin{flushright}';
1525: $endstring .= '\end{flushright}';
1526: } elsif ($align eq 'left') {
1527: $currentstring .= '\begin{flushleft}';
1528: $endstring = '\end{flushleft}';
1529: } else {
1530:
1531: }
1532: $currentstring .= "\n"; # For human readability.
1533: $endstring = "\n$endstring\n"; # For human readability
1534: push(@div_end_stack, $endstring);
1535: }
1536: return $currentstring;
1537: }
1538:
1539: sub end_div {
1540: my ($target,$token) = @_;
1541: my $currentstring = '';
1542: if ($target eq 'web' || $target eq 'webgrade') {
1543: $currentstring .= $token->[2];
1544: }
1545: if ($target eq 'tex') {
1546: my $endstring = pop @div_end_stack;
1547: $currentstring .= $endstring;
1548: }
1549: return $currentstring;
1550: }
1551: }
1552:
1553: #-- <a> tag (end tag required)
1554: sub start_a {
1555: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1556: my $currentstring = '';
1557: if ($target eq 'web' || $target eq 'webgrade') {
1558: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1559: undef,1);
1560: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1561: }
1562: return $currentstring;
1563: }
1564:
1565: sub end_a {
1566: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1567: my $currentstring = '';
1568: if ($target eq 'web' || $target eq 'webgrade') {
1569: $currentstring .= $token->[2];
1570: }
1571: if ($target eq 'tex') {
1572: my $href =
1573: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1574: my $name =
1575: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1576: if ($href =~ /\S/) {
1577: $href =~ s/([^\\])%/$1\\\%/g;
1578: $currentstring .= ' ({\tt URI:'.&Apache::lonxml::latex_special_symbols($href).'})';
1579: } elsif ($name =~ /\S/) {
1580: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1581: } else {
1582: $currentstring.='';
1583: }
1584: }
1585: return $currentstring;
1586: }
1587:
1588: #-- <li> tag (end tag optional)
1589: sub start_li {
1590: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1591: my $currentstring = '';
1592: if ($target eq 'web' || $target eq 'webgrade') {
1593: $currentstring = $token->[4];
1594: } elsif ($target eq 'tex') {
1595: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1596: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1597: #FIXME need to support types i and I
1598: if ($type=~/disc/) {
1599: $currentstring .= ' \item[$\bullet$] ';
1600: } elsif ($type=~/circle/) {
1601: $currentstring .= ' \item[$\circ$] ';
1602: } elsif ($type=~/square/) {
1603: $currentstring .= ' \item[$\diamond$] ';
1604: } elsif ($type eq '1') {
1605: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1606: } elsif ($type eq 'A') {
1607: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1608: } elsif ($type eq 'a') {
1609: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1610: } elsif ($value ne '') {
1611: $currentstring .= ' \item['.$value.'] ';
1612: } else {
1613: $currentstring .= ' \item ';
1614: }
1615: $Apache::londefdef::list_index++;
1616: }
1617: return $currentstring;
1618: }
1619:
1620: sub end_li {
1621: my ($target,$token) = @_;
1622: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1623: if ($target eq 'web' || $target eq 'webgrade') {
1624: $currentstring .= $token->[2];
1625: }
1626: return $currentstring;
1627: }
1628:
1629: #-- <u> tag (end tag required)
1630: sub start_u {
1631: my ($target,$token) = @_;
1632: my $currentstring = '';
1633: if ($target eq 'web' || $target eq 'webgrade') {
1634: $currentstring .= $token->[4];
1635: } elsif ($target eq 'tex') {
1636: &Apache::lonxml::startredirection();
1637: }
1638: return $currentstring;
1639: }
1640:
1641: sub end_u {
1642: my ($target,$token) = @_;
1643: my $currentstring = '';
1644: if ($target eq 'web' || $target eq 'webgrade') {
1645: $currentstring .= $token->[2];
1646: } elsif ($target eq 'tex') {
1647: $currentstring=&Apache::lonxml::endredirection();
1648: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1649: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1650: $currentstring=~s/(\S)\s*$/$1\}/;
1651: }
1652: return $currentstring;
1653: }
1654:
1655: #-- <ul> tag (end tag required)
1656: sub start_ul {
1657: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1658: my $currentstring = &end_p(); # Close off enclosing list.
1659: if ($target eq 'web' || $target eq 'webgrade') {
1660: $currentstring .= $token->[4];
1661: } elsif ($target eq 'tex') {
1662: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1663: $Apache::londefdef::list_index=0;
1664: if ($TeXtype eq 'disc') {
1665: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1666: '\renewcommand{\labelitemii}{$\bullet$}'.
1667: '\renewcommand{\labelitemiii}{$\bullet$}'.
1668: '\renewcommand{\labelitemiv}{$\bullet$}';
1669: } elsif ($TeXtype eq 'circle') {
1670: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1671: '\renewcommand{\labelitemii}{$\circ$}'.
1672: '\renewcommand{\labelitemiii}{$\circ$}'.
1673: '\renewcommand{\labelitemiv}{$\circ$}';
1674: } elsif ($TeXtype eq 'square') {
1675: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1676: '\renewcommand{\labelitemii}{$\diamond$}'.
1677: '\renewcommand{\labelitemiii}{$\diamond$}'.
1678: '\renewcommand{\labelitemiv}{$\diamond$}';
1679: }
1680: $currentstring .= '\strut \begin{itemize}';
1681: }
1682: return $currentstring;
1683: }
1684:
1685: sub end_ul {
1686: my ($target,$token) = @_;
1687: my $currentstring = '';
1688: if ($target eq 'web' || $target eq 'webgrade') {
1689: $currentstring = $token->[2];
1690: } elsif ($target eq 'tex') {
1691: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1692: '\renewcommand{\labelitemii}{$\bullet$}'.
1693: '\renewcommand{\labelitemiii}{$\bullet$}'.
1694: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1695: }
1696: return $currentstring;
1697: }
1698:
1699: #-- <menu> tag (end tag required)
1700: sub start_menu {
1701: my ($target,$token) = @_;
1702: my $currentstring = '';
1703: if ($target eq 'web' || $target eq 'webgrade') {
1704: $currentstring = $token->[4];
1705: } elsif ($target eq 'tex') {
1706: $currentstring = " \\begin{itemize} ";
1707: }
1708: return $currentstring;
1709: }
1710:
1711: sub end_menu {
1712: my ($target,$token) = @_;
1713: my $currentstring = '';
1714: if ($target eq 'web' || $target eq 'webgrade') {
1715: $currentstring = $token->[2];
1716: } elsif ($target eq 'tex') {
1717: $currentstring = " \\end{itemize}";
1718: }
1719: return $currentstring;
1720: }
1721:
1722: #-- <dir> tag (end tag required)
1723: sub start_dir {
1724: my ($target,$token) = @_;
1725: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1726: if ($target eq 'web' || $target eq 'webgrade') {
1727: $currentstring .= $token->[4];
1728: } elsif ($target eq 'tex') {
1729: $currentstring .= " \\begin{itemize} ";
1730: }
1731: return $currentstring;
1732: }
1733:
1734: sub end_dir {
1735: my ($target,$token) = @_;
1736: my $currentstring = '';
1737: if ($target eq 'web' || $target eq 'webgrade') {
1738: $currentstring = $token->[2];
1739: } elsif ($target eq 'tex') {
1740: $currentstring = " \\end{itemize}";
1741: }
1742: return $currentstring;
1743: }
1744:
1745: #-- <ol> tag (end tag required)
1746: sub start_ol {
1747: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1748: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1749: if ($target eq 'web' || $target eq 'webgrade') {
1750: $currentstring .= $token->[4];
1751: } elsif ($target eq 'tex') {
1752: $Apache::londefdef::list_index=0;
1753: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1754: if ($type eq '1') {
1755: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1756: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1757: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1758: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1759: } elsif ($type eq 'A') {
1760: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1761: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1762: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1763: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1764: } elsif ($type eq 'a') {
1765: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1766: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1767: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1768: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1769: } elsif ($type eq 'i') {
1770: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1771: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1772: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1773: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1774: } elsif ($type eq 'I') {
1775: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1776: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1777: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1778: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1779: }
1780: $currentstring .= '\strut \begin{enumerate}';
1781: }
1782: return $currentstring;
1783: }
1784:
1785: sub end_ol {
1786: my ($target,$token) = @_;
1787: my $currentstring = '';
1788: if ($target eq 'web' || $target eq 'webgrade') {
1789: $currentstring = $token->[2];
1790: } elsif ($target eq 'tex') {
1791: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1792: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1793: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1794: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1795: }
1796: return $currentstring;
1797: }
1798:
1799: #-- <dl> tag (end tag required)
1800: sub start_dl {
1801: my ($target,$token) = @_;
1802: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1803: if ($target eq 'web' || $target eq 'webgrade') {
1804: $currentstring .= $token->[4];
1805: } elsif ($target eq 'tex') {
1806: $currentstring .= '\begin{description}';
1807: $Apache::londefdef::DL++;
1808: push(@Apache::londefdef::description,[]);
1809: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1810: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1811: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1812: }
1813: return $currentstring;
1814: }
1815:
1816: sub end_dl {
1817: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1818: my $currentstring = '';
1819: if ($target eq 'web' || $target eq 'webgrade') {
1820: $currentstring = $token->[2];
1821: } elsif ($target eq 'tex') {
1822: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1823: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1824: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1825: $currentstring.=' '.$element.' ';
1826: }
1827: pop(@Apache::londefdef::description);
1828: $currentstring.='\end{description}';
1829: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1830: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1831: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1832: $Apache::londefdef::DL--;
1833: }
1834: return $currentstring;
1835: }
1836:
1837: #-- <dt> tag (end tag optional)
1838: sub start_dt {
1839: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1840: my $currentstring='';
1841: if ($target eq 'web' || $target eq 'webgrade') {
1842: $currentstring = $token->[4];
1843: } elsif ($target eq 'tex') {
1844: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1845: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1846: &Apache::lonxml::startredirection();
1847: $Apache::londefdef::DT[-1]++;
1848: $Apache::londefdef::seenDT[-1]=1;
1849: }
1850: return $currentstring;
1851: }
1852:
1853: sub end_dt {
1854: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1855: my $currentstring = '';
1856: if ($target eq 'web' || $target eq 'webgrade') {
1857: $currentstring = $token->[2];
1858: } elsif ($target eq 'tex') {
1859: if ($Apache::londefdef::DT[-1]) {
1860: my $data=&item_cleanup();
1861: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1862: $Apache::londefdef::DT[-1]--;
1863: }
1864: }
1865: return $currentstring;
1866: }
1867:
1868: sub item_cleanup {
1869: my $item=&Apache::lonxml::endredirection();
1870: $item=~s/\\begin{center}//g;
1871: $item=~s/\\end{center}//g;
1872: return $item;
1873: }
1874:
1875: #-- <dd> tag (end tag optional)
1876: sub start_dd {
1877: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1878: my $currentstring = '';
1879: if ($target eq 'web' || $target eq 'webgrade') {
1880: $currentstring = $token->[4];
1881: } elsif ($target eq 'tex') {
1882: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1883: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1884: if (!$Apache::londefdef::seenDT[-1]) {
1885: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1886: }
1887: push(@{$Apache::londefdef::description[-1]},'');
1888: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1889: $Apache::londefdef::DD[-1]++;
1890: &Apache::lonxml::startredirection();
1891: }
1892: return $currentstring;
1893: }
1894:
1895: sub end_dd {
1896: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1897: my $currentstring = '';
1898: if ($target eq 'web' || $target eq 'webgrade') {
1899: $currentstring = $token->[2];
1900: } elsif ($target eq 'tex') {
1901: $Apache::londefdef::description[-1]->[-1].=
1902: &Apache::lonxml::endredirection().' \vskip 0mm ';
1903: $Apache::londefdef::DD[-1]--;
1904: }
1905: return $currentstring;
1906: }
1907:
1908: #-- <table> tag (end tag required)
1909: # <table> also ends any prior <p> that is not closed.
1910: # but, unless I allow <p>'s to nest, that's the
1911: # only way I could think of to allow <p> in
1912: # <tr> <th> bodies
1913: #
1914: #list of supported attributes: border,width,TeXwidth
1915: sub start_table {
1916: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1917: my $textwidth = '';
1918: my $currentstring = &end_p();
1919: if ($target eq 'web' || $target eq 'webgrade') {
1920: $currentstring .= $token->[4];
1921: } elsif ($target eq 'tex') {
1922: push(@Apache::londefdef::table, {});
1923: $Apache::londefdef::table[-1]{'row_number'} = -1;
1924: #maximum table's width (default coincides with text line length)
1925: if ($#Apache::londefdef::table==0) {
1926: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1927: $textwidth=~/(\d+\.?\d*)/;
1928: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1929: } else {
1930: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1931: #the maximum width of nested table is determined by LATeX width of parent cell
1932: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1933: } else {
1934: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1935: $textwidth=$Apache::londefdef::table[-2]{'width'};
1936: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1937: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1938: }
1939: }
1940: }
1941:
1942: # width either comes forced from the TeXwidth or the width parameters.
1943: # in either case it can be a percentage or absolute width.
1944: # in the width case we ignore absolute width
1945: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1946: if (!defined($TeXwidth)) {
1947: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1948: $safeeval,undef,1);
1949: if ($htmlwidth =~ /%/) {
1950: $TeXwidth = $htmlwidth;
1951: } else {
1952: $TeXwidth = $textwidth;
1953: }
1954: } else {
1955: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1956: }
1957: if ($TeXwidth=~/%/) {
1958: $Apache::londefdef::table[-1]{'percent'}=1;
1959: $TeXwidth=~/(\d+)/;
1960: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1961: } else {
1962: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1963: }
1964: # In the end, however the table width cannot be wider than $textwidth...
1965:
1966: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1967: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1968: }
1969:
1970: #table's border
1971: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1972: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1973: unless (defined $border) { $border = 0; }
1974: if ($border) {
1975: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1976: $Apache::londefdef::table[-1]{'vinc'} = '&';
1977: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1978: } else {
1979: $Apache::londefdef::table[-1]{'hinc'} = '';
1980: $Apache::londefdef::table[-1]{'vinc'} = '&';
1981: $Apache::londefdef::table[-1]{'vvinc'} = '';
1982: }
1983: if ($#Apache::londefdef::table==0) {
1984: # Note that \newline seems to destroy the alignment envs.
1985: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1986: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1987: }
1988: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1989: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1990: $Apache::londefdef::table[-1]{'objectlen'}=[];
1991: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1992: $Apache::londefdef::table[-1]{'maxlen'}=[];
1993: $Apache::londefdef::table[-1]{'minlen'}=[];
1994: $Apache::londefdef::table[-1]{'content'}=[];
1995: $Apache::londefdef::table[-1]{'align'}=[];
1996: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
1997:
1998:
1999: }
2000: return $currentstring;
2001: }
2002:
2003: sub end_table {
2004: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2005: my $currentstring = '';
2006: if ($target eq 'web' || $target eq 'webgrade') {
2007: $currentstring = $token->[2];
2008: } elsif ($target eq 'tex') {
2009: my $inmemory = '';
2010: my $output = '';
2011: my $WARNING='';
2012: #width of columns from TeXwidth attributes
2013:
2014: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2015: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2016: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2017: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2018: }
2019: }
2020: }
2021: #free space and number of empty columns
2022: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2023: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2024: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2025: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2026: $empty_columns++;
2027: } else {
2028: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2029: }
2030: }
2031: #boundaries for contents columns
2032: my @min_len=();#columns can not be narrower
2033: my @max_len=();#maximum length of column
2034: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2035: my ($localmin,$localmax)=(0,0);
2036: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2037: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2038: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2039: }
2040: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2041: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2042: }
2043: }
2044: push @min_len, $localmin;
2045: push @max_len, $localmax;
2046: }
2047: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2048: my $localmin=0,;
2049: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2050: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2051: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2052: }
2053: }
2054: if ($max_len[$jn]<$localmin) {
2055: $max_len[$jn]=$localmin;
2056: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2057: }#object size is bigger
2058: if ($min_len[$jn]<$localmin) {
2059: $min_len[$jn]=$localmin;
2060: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2061: }#object size is bigger
2062: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2063: $min_len[$jn]=0;
2064: $max_len[$jn]=0;
2065: }
2066: }
2067: #final adjustment of column width
2068: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2069: my @adjust=();
2070: #step 1. adjustment by maximum value
2071: my $space_neeeded=0;
2072: for (my $jn=0;$jn<=$#max_len;$jn++) {
2073: $space_neeeded=$space_neeeded+$max_len[$jn];
2074: }
2075: if ($space_neeeded<=$available_space) {
2076: for (my $jn=0;$jn<=$#max_len;$jn++) {
2077: if ($fwidth[$jn]==0) {
2078: $fwidth[$jn]=$max_len[$jn];
2079: }
2080: }
2081: } else {
2082: #step 2. adjustment by minimum value (estimation)
2083: $space_neeeded=0;
2084: for (my $jn=0;$jn<=$#min_len;$jn++) {
2085: $space_neeeded+=$min_len[$jn];
2086: }
2087: if ($space_neeeded>$available_space) {
2088: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2089: for (my $jn=0;$jn<=$#max_len;$jn++) {
2090: if ($fwidth[$jn]==0) {
2091: $fwidth[$jn]=$min_len[$jn];
2092: }
2093: }
2094: #check if we have objects which can be scaled
2095: my $how_many_to_scale=0;
2096: my @to_scale=();
2097: for (my $jn=0;$jn<=$#max_len;$jn++) {
2098: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2099: $how_many_to_scale++;
2100: push @to_scale, $jn;
2101: }
2102: }
2103: if ($how_many_to_scale>0) {
2104: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2105: foreach my $jn (@to_scale) {
2106: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2107: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2108: if ($1 ne '') {
2109: my $current_length=&recalc($1);
2110: $current_length=~/(\d+\.?\d*)/;
2111: $current_length=$current_length-$space_to_adjust;
2112: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2113: }
2114: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2115: if ($1 ne '') {
2116: my $current_length=$1;
2117: $current_length=$current_length-$space_to_adjust;
2118: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2119: }
2120: }
2121: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2122: }
2123: }
2124: } else {
2125: #step 3. adjustment over minimal + corrections
2126: my $enlarge_coef=$available_space/$space_neeeded;
2127: my $acsessive=0;
2128: for (my $jn=0;$jn<=$#min_len;$jn++) {
2129: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2130: if ($adjust[$jn]>$max_len[$jn]) {
2131: $fwidth[$jn]=$max_len[$jn];
2132: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2133: $adjust[$jn]=0;
2134: }
2135: }
2136: if ($acsessive>0) {
2137: #we have an excess of space and can redistribute it
2138: my $notempty_columns=0;
2139: for (my $jn=0;$jn<=$#min_len;$jn++) {
2140: if ($adjust[$jn]!=0) {
2141: $notempty_columns++;
2142: }
2143: }
2144: my $per_column=$acsessive/$notempty_columns;
2145: for (my $jn=0;$jn<=$#min_len;$jn++) {
2146: if ($adjust[$jn]!=0) {
2147: $adjust[$jn]+=$per_column;
2148: $fwidth[$jn]=$adjust[$jn];
2149: }
2150: }
2151: } else {
2152: for (my $jn=0;$jn<=$#min_len;$jn++) {
2153: $fwidth[$jn]=$adjust[$jn];
2154: }
2155: }
2156: }
2157: }
2158: #use all available width if it is defined in % or as TeXwidth
2159: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2160: my $current=0;
2161: for (my $i=0;$i<=$#fwidth;$i++) {
2162: $current+=$fwidth[$i];
2163: }
2164: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2165: for (my $i=0;$i<=$#fwidth;$i++) {
2166: $fwidth[$i]*=$coef;
2167: }
2168: }
2169: #removing of empty columns if allowed
2170: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2171: if ($permission eq 'yes') {
2172: my @cleaned_table=();
2173: my @cleaned_header=();
2174: my $colind=0;
2175: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2176: if ($fwidth[$jn]!=0) {
2177: #we need to copy column
2178: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2179: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2180: $cleaned_header[$colind]=$fwidth[$jn];
2181: }
2182: $colind++;
2183: }
2184: }
2185: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2186: @fwidth=@cleaned_header;
2187: }
2188: #construct header of the table
2189: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2190: for (my $in=0;$in<=$#fwidth;$in++) {
2191: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2192: }
2193: $header_of_table .= '}';
2194: #fill the table
2195: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2196: my $have_rowspan = 0;
2197: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2198:
2199: #-----------------------------------------------------------
2200: # I think this order of doing things will ensure that
2201: # single rowspan, columspan and combined row/colspans will
2202: # work correctly. LaTeX is delicate here.
2203: # RF.
2204:
2205: # Start a rowspan if necessary:
2206:
2207: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2208: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2209: #
2210: # Do the appropriate magic if this has a colspan
2211: #
2212:
2213: if ($colspan > 1) {
2214: my $spanwidth = 0;
2215: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2216: $spanwidth += $fwidth[$spancol];
2217: }
2218: $output .= '\multicolumn{'.
2219: $colspan
2220: ."}";
2221: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2222: $output .= '{|c|}{';
2223: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2224: $output .= '{|r|}{';
2225: }
2226: else {
2227: $output .= "{|p{$spanwidth mm}|}{";
2228: }
2229:
2230: }
2231:
2232: # Rowspan... if colspan is 1, and there's an alignment we'll need
2233: # to kick in a multicolumn in order to get the alignment spec.
2234: # this must precede the multirow or LaTex gets quite upset.
2235: # Naturally if colspan > 1 we've already done that above ^
2236: #
2237: my $multirow_aligned = 0;
2238: if ($rowspan > 1) {
2239: if ($colspan == 1) {
2240: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2241: $output .= '\multicolumn{1}{|c|}{';
2242: $multirow_aligned = 1;
2243: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2244: $output .= '\multicolumn{1}{|r|}{';
2245: $multirow_aligned = 1;
2246: }
2247: }
2248: $have_rowspan++;
2249: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2250:
2251: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2252: s{^\s*\\par\s*}{};
2253: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2254: s{\s*\\vskip\s*0pt\s*$}{};
2255:
2256: #
2257: # If we did not throw in a multicolumn to align, then add
2258: # an extra {
2259: # so we close correctly without having to keep additional state
2260: # around
2261: #
2262: if (!$multirow_aligned) {
2263: $output .= '{';
2264: }
2265: }
2266: if (($rowspan eq '^') || ($rowspan eq '_')) {
2267: $have_rowspan++;
2268: }
2269: #--------------------------------------------------------------
2270:
2271:
2272: # For right and center alignment of single cells.
2273: # we are going to use a multicolumn with a span of 1 to specify alignment.
2274: #
2275: if ($colspan == 1 && $rowspan == 1) {
2276: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2277: $output .= '\multicolumn{1}{|c|}{';
2278: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2279: $output .= '\multicolumn{1}{|r|}{';
2280: }
2281: }
2282:
2283: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2284:
2285: if (($colspan == 1 && $rowspan == 1) &&
2286: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2287: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2288: $output .= '}';
2289: }
2290:
2291: # Close off any open multirow:
2292:
2293: if ($rowspan > 1) {
2294: $output .= '}}';
2295: }
2296: # Close off the colspan...
2297: #
2298: if ($colspan > 1) {
2299: $output .= '}';
2300: $jn += $colspan-1; # Adjust for number of rows really left.
2301: }
2302: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2303: }
2304: # If have_rowspan > 0, and borders are on, then
2305: # we need to do more than put an \hline at the bottom of row.
2306: # we need to do the appropriate \cline to ensure that
2307: # the spanned rows don't have \hlines through them.
2308:
2309: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2310: $output .= ' \\\\ ';
2311: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2312: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2313: if ($rowspan ne "^") {
2314: if (($rowspan <= 1) || ($rowspan eq '_')) {
2315: my $column = $jn+1;
2316: $output .= '\cline{'.$column.'-'.$column.'} ';
2317: }
2318: }
2319: }
2320:
2321: } else {
2322: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2323: }
2324: }
2325: # Note that \newline destroys alignment env's produced by e.g. <div>
2326: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2327: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2328: if ($#Apache::londefdef::table > 0) {
2329: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2330: # Figure out max/and min width by summing us and then
2331: # apply that to the current column of the table we nest in
2332: # if it's larger than the current width or the current width
2333: # is undefined.
2334: #
2335: my $min_nested_width = 0;
2336: my $max_nested_width = 0;
2337: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2338: $min_nested_width += $min_len[$col];
2339: $max_nested_width += $max_len[$col];
2340:
2341: }
2342: # Fudge in an extra 5 mm for borders etc:
2343:
2344: $min_nested_width += 5;
2345: $max_nested_width += 5;
2346:
2347: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2348: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2349: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2350: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2351: }
2352: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2353: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2354: }
2355:
2356: pop @Apache::londefdef::table;
2357: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2358: } else {
2359: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2360: pop @Apache::londefdef::table;
2361: undef @Apache::londefdef::table;
2362: }
2363: }
2364: return $currentstring;
2365: }
2366:
2367: #-- <tr> tag (end tag optional)
2368: sub start_tr {
2369: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2370: my $currentstring = '';
2371: if ($target eq 'web' || $target eq 'webgrade') {
2372: $currentstring = $token->[4];
2373: } elsif ($target eq 'tex') {
2374: $Apache::londefdef::table[-1]{'row_number'}++;
2375: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2376: if ($alignchar ne '') {
2377: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2378: } else {
2379: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2380: }
2381: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2382: #
2383: # Need to save the number of table columns to preserve the max # columns.
2384: #
2385: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2386: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2387: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2388: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2389: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2390: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2391: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2392: }
2393: return $currentstring;
2394: }
2395:
2396: sub end_tr {
2397: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2398: my $currentstring = &end_p(); # Close any pending <p> in the row.
2399: if ($target eq 'web' || $target eq 'webgrade') {
2400: $currentstring .= $token->[2];
2401: } elsif ($target eq 'tex') {
2402: if ($Apache::londefdef::TD_redirection) {
2403: &end_td_tex($parstack,$parser,$safeeval);
2404: }
2405: # Counter columns must be the maximum number of columns seen
2406: # in the table so far so:
2407: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2408: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2409: }
2410:
2411:
2412:
2413: }
2414: return $currentstring;
2415: }
2416:
2417: #-- <td> tag (end tag optional)
2418: sub start_td {
2419: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2420: my $currentstring = '';
2421: if ($target eq 'web' || $target eq 'webgrade') {
2422: $currentstring = $token->[4];
2423: } elsif ($target eq 'tex') {
2424: $Apache::londefdef::TD_redirection = 1;
2425: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2426: }
2427: return $currentstring;
2428: }
2429:
2430: sub tag_check {
2431: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2432: my @ar=@$parstack;
2433: for (my $i=$#ar-1;$i>=0;$i--) {
2434: if (lc($$tagstack[$i]) eq $good_tag) {
2435: &start_td_tex($parstack,$parser,$safeeval);
2436: last;
2437: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2438: splice @ar, $i+1;
2439: &end_td_tex(\@ar,$parser,$safeeval);
2440: &start_td_tex($parstack,$parser,$safeeval);
2441: last;
2442: }
2443: }
2444: return '';
2445: }
2446:
2447: sub start_td_tex {
2448: my ($parstack,$parser,$safeeval) = @_;
2449: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2450: if ($alignchar eq '') {
2451: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2452: }
2453: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2454: $Apache::londefdef::table[-1]{'counter_columns'}++;
2455: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2456: if (defined $TeXwidth) {
2457: my $current_length=&recalc($TeXwidth);
2458: $current_length=~/(\d+\.?\d*)/;
2459: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2460: }
2461: &Apache::lonxml::startredirection();
2462: return '';
2463: }
2464:
2465: sub end_td_tex {
2466: my ($parstack,$parser,$safeeval) = @_;
2467: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2468: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2469: my $data = &Apache::lonxml::endredirection();
2470:
2471: # The rowspan array of the table indicates which cells are part of a span.
2472: # n indicates the start of a span set of n rows.
2473: # ^ indicates a cell that continues a span set.
2474: # _ indicates the cell is at the bottom of a span set.
2475: # If this and subsequent cells are part of a rowspan, we must
2476: # push along the row until we find one that is not.
2477:
2478: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2479: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2480: # Part of a span.
2481: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2482: $current_column++;
2483: }
2484: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2485:
2486:
2487: # Get the column and row spans.
2488: # Colspan can be done via \multicolumn if I can figure out the data structs.
2489:
2490: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2491: if (!$colspan) {
2492: $colspan = 1;
2493: }
2494:
2495: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2496: if (!$rowspan) {
2497: $rowspan = 1;
2498: }
2499:
2500:
2501:
2502: for (my $c = 0; $c < $colspan; $c++) {
2503: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2504: for (my $i = 1; $i < $rowspan; $i++) {
2505: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2506: if ($i == ($rowspan-1)) {
2507: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2508: }
2509: }
2510: }
2511:
2512: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2513: if (defined $TeXwidth) {
2514: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2515: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2516: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2517: } else {
2518: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2519: my $garbage_data=$data;
2520: my $fwidth=0;
2521: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2522: my $current_length=&recalc($1);
2523: $current_length=~/(\d+\.?\d*)/;
2524: if ($fwidth<$1) {$fwidth=$1;}
2525: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2526: }
2527: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2528: my $current_length=$1;
2529: if ($fwidth<$current_length) {$fwidth=$current_length;}
2530: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2531: }
2532: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2533: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2534: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2535: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2536: } elsif ($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)*/) {
2537: my $garbage_data=$data;
2538: my $fwidth=0;
2539: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2540: my $current_length=&recalc($1);
2541: $current_length=~/(\d+\.?\d*)/;
2542: if ($fwidth<$1) {$fwidth=$1;}
2543: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2544: }
2545: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2546: my $current_length=&recalc($1);
2547: $current_length=~/(\d+\.?\d*)/;
2548: if ($fwidth<$1) {$fwidth=$1;}
2549: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2550: }
2551: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2552: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2553: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2554: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2555: $data=~s/\\\\\s*$//;
2556: } else {
2557: $data=~s/^\s+(\S.*)/$1/;
2558: $data=~s/(.*\S)\s+$/$1/;
2559: $data=~s/(\s)+/$1/;
2560: my ($current_length,$min_length)=(0,0);
2561: if ($data=~/\\vskip/) {
2562: my $newdata=$data;
2563: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2564: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2565: foreach my $elementdata (@newdata) {
2566: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2567: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2568: my @words=split(/ /,$elementdata);
2569: foreach my $word (@words) {
2570: my $lengthword=2.5*&LATEX_length($word);
2571: if ($min_length<$lengthword) {$min_length=$lengthword;}
2572: }
2573: }
2574: } else {
2575: $current_length=2.5*&LATEX_length($data);
2576: my @words=split(/ /,$data);
2577: foreach my $word (@words) {
2578: my $lengthword=2*&LATEX_length($word);
2579: if ($min_length<$lengthword) {$min_length=$lengthword;}
2580: }
2581: }
2582: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2583: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2584: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2585: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2586: }
2587: }
2588: # Substitute all of the tables nested in this cell in their appropriate places.
2589:
2590:
2591: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2592: for (my $in=0; $in<=$nested_count; $in++) {
2593: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2594: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2595: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2596: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2597:
2598: }
2599: # Should be be killing off the 'include' elements as they're used up?
2600:
2601: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2602:
2603:
2604:
2605:
2606: # the colspan array will indicate how many columns will be spanned by this
2607: # cell..this requires that counter_columns also be adjusted accordingly
2608: # so that the next bunch of text goes in the right cell. Note that since
2609: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2610: #
2611:
2612: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2613: for (my $i = 0; $i < ($colspan -1); $i++) {
2614: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2615: }
2616: for (my $r = 0; $r < $rowspan; $r++) {
2617: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2618: # Put empty text in spanned cols.
2619:
2620: }
2621:
2622:
2623:
2624: return '';
2625: }
2626:
2627: sub end_td {
2628: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2629: my $currentstring = '';
2630: if ($target eq 'web' || $target eq 'webgrade') {
2631: $currentstring = $token->[2];
2632: } elsif ($target eq 'tex') {
2633: $Apache::londefdef::TD_redirection =0;
2634: &end_td_tex($parstack,$parser,$safeeval);
2635: }
2636: return $currentstring;
2637: }
2638:
2639: #-- <th> tag (end tag optional)
2640: sub start_th {
2641: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2642: my $currentstring = '';
2643: if ($target eq 'web' || $target eq 'webgrade') {
2644: $currentstring = $token->[4];
2645: } elsif ($target eq 'tex') {
2646: $Apache::londefdef::TD_redirection = 1;
2647: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2648: }
2649: return $currentstring;
2650: }
2651:
2652: sub tagg_check {
2653: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2654: my @ar=@$parstack;
2655: for (my $i=$#ar-1;$i>=0;$i--) {
2656: if (lc($$tagstack[$i]) eq $good_tag) {
2657: &start_th_tex($parstack,$parser,$safeeval);
2658: last;
2659: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2660: splice @ar, $i+1;
2661: &end_th_tex(\@ar,$parser,$safeeval);
2662: &start_th_tex($parstack,$parser,$safeeval);
2663: last;
2664: }
2665: }
2666: return '';
2667: }
2668:
2669: sub start_th_tex {
2670: my ($parstack,$parser,$safeeval) = @_;
2671: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2672: if ($alignchar eq '') {
2673: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2674: }
2675: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2676: $Apache::londefdef::table[-1]{'counter_columns'}++;
2677: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2678: if (defined $TeXwidth) {
2679: my $current_length=&recalc($TeXwidth);
2680: $current_length=~/(\d+\.?\d*)/;
2681: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2682: }
2683: &Apache::lonxml::startredirection();
2684: return '';
2685: }
2686:
2687: sub end_th_tex {
2688: my ($parstack,$parser,$safeeval) = @_;
2689: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2690: my $data=&Apache::lonxml::endredirection();
2691: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2692: if (defined $TeXwidth) {
2693: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2694: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2695: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2696: } else {
2697: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2698: my $garbage_data=$data;
2699: my $fwidth=0;
2700: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2701: my $current_length=&recalc($1);
2702: $current_length=~/(\d+\.?\d*)/;
2703: if ($fwidth<$1) {$fwidth=$1;}
2704: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2705: }
2706: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2707: my $current_length=$1;
2708: if ($fwidth<$current_length) {$fwidth=$current_length;}
2709: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2710: }
2711: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2712: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2713: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2714: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2715: } else {
2716: $data=~s/^\s+(\S.*)/$1/;
2717: $data=~s/(.*\S)\s+$/$1/;
2718: $data=~s/(\s)+/$1/;
2719: my ($current_length,$min_length)=(0,0);
2720: if ($data=~/\\vskip/) {
2721: my $newdata=$data;
2722: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2723: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2724: foreach my $elementdata (@newdata) {
2725: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2726: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2727: my @words=split(/ /,$elementdata);
2728: foreach my $word (@words) {
2729: my $lengthword=2.5*&LATEX_length($word);
2730: if ($min_length<$lengthword) {$min_length=$lengthword;}
2731: }
2732: }
2733: } else {
2734: $current_length=2.5*&LATEX_length($data);
2735: my @words=split(/ /,$data);
2736: foreach my $word (@words) {
2737: my $lengthword=2*&LATEX_length($word);
2738: if ($min_length<$lengthword) {$min_length=$lengthword;}
2739: }
2740: }
2741: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2742: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2743: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2744: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2745: }
2746: }
2747: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2748: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2749: }
2750: #make data bold
2751: $data='\textbf{'.$data.'}';
2752: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2753: return'';
2754: }
2755:
2756: sub end_th {
2757: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2758: my $currentstring = &end_p(); # Close any open <p> in the row.
2759: if ($target eq 'web' || $target eq 'webgrade') {
2760: $currentstring .= $token->[2];
2761: } elsif ($target eq 'tex') {
2762: $Apache::londefdef::TD_redirection =0;
2763: &end_th_tex($parstack,$parser,$safeeval);
2764: }
2765: return $currentstring;
2766: }
2767:
2768: #-- <img> tag (end tag forbidden)
2769: #
2770: # Render the <IMG> tag.
2771: # <IMG> has the following attributes (in addition to the
2772: # standard HTML ones:
2773: # TeXwrap - Governs how the tex target will try to wrap text around
2774: # horizontally aligned images.
2775: # TeXwidth - The width of the image when rendered for print (mm).
2776: # TeXheight - The height of the image when rendered for print (mm)
2777: # (Note there seems to also be support for this as a % of page size)
2778: #
2779: sub start_img {
2780: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2781: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2782: undef,1);
2783: if (! $src &&
2784: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2785: ) {
2786: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2787: return '';
2788: }
2789: &Apache::lonxml::extlink($src);
2790: my $currentstring = '';
2791: my $scaling = .3;
2792:
2793: # Render unto browsers that which are the browser's...
2794:
2795: if ($target eq 'web' || $target eq 'webgrade') {
2796: if ($env{'browser.imagesuppress'} ne 'on') {
2797: my $enc = ('yes' eq
2798: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2799: $safeeval)));
2800: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2801: $enc);
2802: } else {
2803: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2804: undef,1);
2805: if (!$alttag) {
2806: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2807: $src);
2808: }
2809: $currentstring.='[IMAGE: '.$alttag.']';
2810: }
2811:
2812: # and render unto TeX that which is LaTeX
2813:
2814: } elsif ($target eq 'tex') {
2815: #
2816: # The alignment will require some superstructure to be put around
2817: # the \includegraphics stuff. At present we can only partially
2818: # simulate the alignments offered by html.
2819: #
2820: #
2821: my $align = lc(&Apache::lonxml::get_param('align',
2822: $parstack,
2823: $safeeval,
2824: undef,1));
2825: if(!$align) {
2826: $align = "bottom"; # This is html's default so it's ours too.
2827: }
2828: #
2829: &Apache::lonxml::debug("Alignemnt = $align");
2830: # LaTeX's image/text wrapping is really bad since it wants to
2831: # make figures float.
2832: # The user has the optional parameter (applicable only to l/r
2833: # alignment to use the picins/parpic directive to get wrapped text
2834: # this is also imperfect.. that's why we give them a choice...
2835: # so they can't yell at us for our choice.
2836: #
2837: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2838: $parstack,
2839: $safeeval,
2840: undef,0);
2841: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2842: if(!$latex_rendering) {
2843: $latex_rendering = "texwrap";
2844: }
2845: # using texwrap inside a table does not work. So, if after all of this,
2846: # texwrap is on, we turn it off if we detect we're in a table:
2847: #
2848: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2849: $latex_rendering = 'parpic';
2850: }
2851:
2852: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2853:
2854: #if original gif/jpg/png file exist do following:
2855: my $origsrc=$src;
2856: my ($path,$file) = &get_eps_image($src);
2857: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2858: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2859: &Apache::lonxml::debug("path = $path file = $file src = $src");
2860: if (-e $src) {
2861: &Apache::lonxml::debug("$src exists");
2862: my ($height_param,$width_param)=
2863: &image_size($origsrc,0.3,$parstack,$safeeval);
2864: my $size;
2865: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2866: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2867: # Default size if not able to extract that (e.g. eps image).
2868:
2869: # &Apache::lonnet::logthis("Size = $size");
2870:
2871: $size='['.$size;
2872: $size=~s/,$/]/;
2873: $currentstring .= '\graphicspath{{'.$path.'}}'
2874: .'\includegraphics'.$size.'{'.$file.'} ';
2875: my $closure;
2876: ($currentstring, $closure) = &align_latex_image($align,
2877: $latex_rendering,
2878: $currentstring,
2879: $width_param,
2880: $height_param);
2881: $currentstring .= $closure;
2882:
2883: } else {
2884: &Apache::lonxml::debug("$src does not exist");
2885: #original image file doesn't exist so check the alt attribute
2886: my $alt =
2887: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2888: unless ($alt) {
2889: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2890: }
2891:
2892: if ($alt) { $currentstring .= ' '.$alt.' '; }
2893: }
2894:
2895: # And here's where the semi-quote breaks down: allow the user
2896: # to edit the beast as well by rendering the problem for edit:
2897: } elsif ($target eq 'edit') {
2898: $currentstring .=&Apache::edit::tag_start($target,$token);
2899: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2900: &Apache::edit::browse('src',undef,'alt').' '.
2901: &Apache::edit::search('src',undef,'alt').'<br />';
2902: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2903: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2904: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2905: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2906: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2907: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2908: ['','bottom','middle','top','left','right'],$token,5);
2909: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2910: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
2911: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2912: ['no','yes'], $token, 2);
2913: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2914: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2915: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2916: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2917: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2918:
2919:
2920: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2921: if ($width) { $currentstring.=' width="'.$width.'" '; }
2922: if ($height) { $currentstring.=' height="'.$height.'" '; }
2923: $currentstring .= ' />';
2924: } elsif ($target eq 'modified') {
2925: my ($osrc,$owidth,$oheight)=
2926: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2927: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2928: $safeeval,'src','alt','align',
2929: 'TeXwidth','TeXheight', 'TeXwrap',
2930: 'width','height','encrypturl');
2931: my ($nsrc,$nwidth,$nheight)=
2932: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2933: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2934: &image_replication($loc);
2935: my ($iwidth,$iheight);
2936: if (-e $loc) {
2937: my $image = Image::Magick->new;
2938: $image->Read($loc);
2939: ($iwidth, $iheight) = ($image->Get('width'),
2940: $image->Get('height'));
2941: }
2942: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2943: # changed image or no size specified,
2944: # if they didn't explicitly change the
2945: # width or height use the ones from the image
2946: if ($iwidth && $iheight) {
2947: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2948: $token->[2]{'width'} = $iwidth;$ctag=1;
2949: }
2950: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2951: $token->[2]{'height'}=$iheight;$ctag=1;
2952: }
2953: }
2954: }
2955: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2956: # if we don't have a width or height
2957: if ($iwidth && $cwidth && !$cheight) {
2958: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2959: }
2960: if ($iheight && $cheight && !$cwidth) {
2961: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2962: }
2963: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2964: }
2965:
2966: return $currentstring;
2967: }
2968:
2969: sub end_img {
2970: my ($target,$token) = @_;
2971: my $currentstring = '';
2972: if ($target eq 'web' || $target eq 'webgrade') {
2973: $currentstring = $token->[2];
2974: } elsif ($target eq 'tex') {
2975: $currentstring = '';
2976: }
2977: return $currentstring;
2978: }
2979:
2980: #-- <applet> tag (end tag required)
2981: sub start_applet {
2982: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2983:
2984: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2985: &Apache::lonxml::extlink($code);
2986: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2987: undef,1);
2988: &Apache::lonxml::extlink($archive);
2989: my $currentstring = '';
2990: if ($target eq 'web' || $target eq 'webgrade') {
2991: if ($env{'browser.appletsuppress'} ne 'on') {
2992: $currentstring = &Apache::lonenc::encrypt_ref($token,
2993: {'code'=>$code,
2994: 'archive'=>$archive}
2995: );
2996: } else {
2997: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
2998: $safeeval,undef,1);
2999: unless ($alttag) {
3000: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3001: $code);
3002: }
3003: $currentstring='[APPLET: '.$alttag.']';
3004: }
3005: } elsif ($target eq 'tex') {
3006: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3007: $safeeval,undef,1);
3008: unless ($alttag) {
3009: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3010: undef,1);
3011: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3012: $code);
3013: }
3014: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3015: '.}\end{center}';
3016: }
3017: return $currentstring;
3018: }
3019:
3020: sub end_applet {
3021: my ($target,$token) = @_;
3022: my $currentstring = '';
3023: if ($target eq 'web' || $target eq 'webgrade') {
3024: $currentstring = $token->[2];
3025: } elsif ($target eq 'tex') {
3026: }
3027: return $currentstring;
3028: }
3029:
3030: #-- <embed> tag (end tag optional/required)
3031: sub start_embed {
3032: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3033: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3034: &Apache::lonxml::extlink($src);
3035: my $currentstring = '';
3036: if ($target eq 'web' || $target eq 'webgrade') {
3037: if ($env{'browser.embedsuppress'} ne 'on') {
3038: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3039: } else {
3040: my $alttag=&Apache::lonxml::get_param
3041: ('alt',$parstack,$safeeval,undef,1);
3042: unless ($alttag) {
3043: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3044: }
3045: $currentstring='[EMBED: '.$alttag.']';
3046: }
3047: } elsif ($target eq 'tex') {
3048: }
3049: return $currentstring;
3050: }
3051:
3052: sub end_embed {
3053: my ($target,$token) = @_;
3054: my $currentstring = '';
3055: if ($target eq 'web' || $target eq 'webgrade') {
3056: $currentstring = $token->[2];
3057: } elsif ($target eq 'tex') {
3058: }
3059: return $currentstring;
3060: }
3061:
3062: #-- <param> tag (end tag forbidden)
3063: sub start_param {
3064: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3065: if (&Apache::lonxml::get_param('name',$parstack,
3066: $safeeval,undef,1)=~/^cabbase$/i) {
3067: my $value=&Apache::lonxml::get_param('value',$parstack,
3068: $safeeval,undef,1);
3069: &Apache::lonxml::extlink($value);
3070: }
3071:
3072: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3073: &Apache::lonxml::extlink($src);
3074: my $currentstring = '';
3075: if ($target eq 'web' || $target eq 'webgrade') {
3076: my %toconvert;
3077: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3078: if ($src) { $toconvert{'src'}= $src; }
3079: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3080: undef,1);
3081: if ($name=~/^cabbase$/i) {
3082: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3083: $safeeval,undef,1);
3084: }
3085: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3086: } elsif ($target eq 'tex') {
3087: }
3088: return $currentstring;
3089: }
3090:
3091: sub end_param {
3092: my ($target,$token) = @_;
3093: my $currentstring = '';
3094: if ($target eq 'web' || $target eq 'webgrade') {
3095: $currentstring = $token->[2];
3096: } elsif ($target eq 'tex') {
3097: }
3098: return $currentstring;
3099: }
3100:
3101: #-- <allow> tag
3102: sub start_allow {
3103: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3104: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3105: &Apache::lonxml::extlink($src);
3106:
3107: if ($target eq 'tex') { &image_replication($src); }
3108: my $result;
3109: if ($target eq 'edit') {
3110: $result .=&Apache::edit::tag_start($target,$token);
3111: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3112: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3113: } elsif ($target eq 'modified') {
3114: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3115: $safeeval,'src');
3116: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3117: }
3118: return $result;
3119: }
3120:
3121: sub end_allow {
3122: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3123: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3124: return '';
3125: }
3126:
3127: #-- Frames (end tag required)
3128: #-- <frameset>
3129: sub start_frameset {
3130: my ($target,$token) = @_;
3131: my $currentstring = ''; # Close any pending para.
3132: if ($target eq 'web' || $target eq 'webgrade') {
3133: $currentstring =
3134: &Apache::loncommon::start_page($Apache::londefdef::title,
3135: $Apache::londefdef::head,
3136: {'add_entries' => $token->[2],
3137: 'no_title' => 1,
3138: 'force_register' => 1,
3139: 'frameset' => 1,});
3140:
3141: }
3142: return $currentstring;
3143: }
3144:
3145: sub end_frameset {
3146: my ($target,$token) = @_;
3147: my $currentstring = '';
3148: if ($target eq 'web' || $target eq 'webgrade') {
3149: $currentstring = $token->[2];
3150: }
3151: return $currentstring;
3152: }
3153:
3154: #-- <xmp> (end tag required)
3155: sub start_xmp {
3156: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3157: my $currentstring = '';
3158: if ($target eq 'web' || $target eq 'webgrade') {
3159: $currentstring .= $token->[4];
3160: } elsif ($target eq 'tex') {
3161: $currentstring .= '\begin{verbatim}';
3162: }
3163: return $currentstring;
3164: }
3165:
3166: sub end_xmp {
3167: my ($target,$token) = @_;
3168: my $currentstring = '';
3169: if ($target eq 'web' || $target eq 'webgrade') {
3170: $currentstring .= $token->[2];
3171: } elsif ($target eq 'tex') {
3172: $currentstring .= '\end{verbatim}';
3173: }
3174: return $currentstring;
3175: }
3176:
3177: #-- <pre> (end tag required)
3178: sub start_pre {
3179: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3180: my $currentstring = &end_p(); # close off pending <p>
3181: if ($target eq 'web' || $target eq 'webgrade') {
3182: $currentstring .= $token->[4];
3183: } elsif ($target eq 'tex') {
3184: $currentstring .= '\begin{verbatim}';
3185: &Apache::lonxml::disable_LaTeX_substitutions();
3186: }
3187: return $currentstring;
3188: }
3189:
3190: sub end_pre {
3191: my ($target,$token) = @_;
3192: my $currentstring = '';
3193: if ($target eq 'web' || $target eq 'webgrade') {
3194: $currentstring .= $token->[2];
3195: } elsif ($target eq 'tex') {
3196: $currentstring .= '\end{verbatim}';
3197: &Apache::lonxml::enable_LaTeX_substitutions();
3198: }
3199: return $currentstring;
3200: }
3201:
3202: #-- <insert>
3203: sub start_insert {
3204: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3205: my $currentstring = '';
3206: if ($target eq 'web' || $target eq 'webgrade') {
3207: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3208: $currentstring .= '<b>'.$display.'</b>';;
3209: }
3210: return $currentstring;
3211: }
3212:
3213: sub end_insert {
3214: my ($target,$token) = @_;
3215: my $currentstring = '';
3216: if ($target eq 'web' || $target eq 'webgrade') {
3217: $currentstring .= '';
3218: }
3219: return $currentstring;
3220: }
3221:
3222: #-- <externallink>
3223: sub start_externallink {
3224: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3225: my $currentstring = '';
3226: if ($target eq 'web' || $target eq 'webgrade') {
3227: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3228: $currentstring .= '<b>'.$display.'</b>';;
3229: }
3230: return $currentstring;
3231: }
3232:
3233: sub end_externallink {
3234: my ($target,$token) = @_;
3235: my $currentstring = '';
3236: if ($target eq 'web' || $target eq 'webgrade') {
3237: $currentstring .= '';
3238: }
3239: return $currentstring;
3240: }
3241:
3242: #-- <blankspace heigth="">
3243: sub start_blankspace {
3244: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3245: my $currentstring = &end_p(); # closes off any unclosed <p>
3246: if ($target eq 'tex') {
3247: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3248: $currentstring .= '\vskip '.$howmuch.' ';
3249: }
3250: return $currentstring;
3251: }
3252:
3253: sub end_blankspace {
3254: my ($target,$token) = @_;
3255: my $currentstring = '';
3256: if ($target eq 'tex') {
3257: $currentstring .= '';
3258: }
3259: return $currentstring;
3260: }
3261:
3262: #-- <abbr> tag (end tag required)
3263: sub start_abbr {
3264: my ($target,$token) = @_;
3265: my $currentstring = '';
3266: if ($target eq 'web' || $target eq 'webgrade') {
3267: $currentstring = $token->[4];
3268: }
3269: return $currentstring;
3270: }
3271:
3272: sub end_abbr {
3273: my ($target,$token) = @_;
3274: my $currentstring = '';
3275: if ($target eq 'web' || $target eq 'webgrade') {
3276: $currentstring = $token->[2];
3277: }
3278: return $currentstring;
3279: }
3280:
3281: #-- <acronym> tag (end tag required)
3282: sub start_acronym {
3283: my ($target,$token) = @_;
3284: my $currentstring = '';
3285: if ($target eq 'web' || $target eq 'webgrade') {
3286: $currentstring = $token->[4];
3287: }
3288: return $currentstring;
3289: }
3290:
3291: sub end_acronym {
3292: my ($target,$token) = @_;
3293: my $currentstring = '';
3294: if ($target eq 'web' || $target eq 'webgrade') {
3295: $currentstring = $token->[2];
3296: }
3297: return $currentstring;
3298: }
3299:
3300: #-- <area> tag (end tag forbidden)
3301: sub start_area {
3302: my ($target,$token) = @_;
3303: my $currentstring = '';
3304: if ($target eq 'web' || $target eq 'webgrade') {
3305: $currentstring = $token->[4];
3306: }
3307: return $currentstring;
3308: }
3309:
3310: sub end_area {
3311: my ($target,$token) = @_;
3312: my $currentstring = '';
3313: if ($target eq 'web' || $target eq 'webgrade') {
3314: $currentstring = $token->[2];
3315: }
3316: return $currentstring;
3317: }
3318:
3319: #-- <base> tag (end tag forbidden)
3320: sub start_base {
3321: my ($target,$token) = @_;
3322: my $currentstring = '';
3323: if ($target eq 'web' || $target eq 'webgrade') {
3324: $currentstring = $token->[4];
3325: }
3326: return $currentstring;
3327: }
3328:
3329: sub end_base {
3330: my ($target,$token) = @_;
3331: my $currentstring = '';
3332: if ($target eq 'web' || $target eq 'webgrade') {
3333: $currentstring = $token->[2];
3334: }
3335: return $currentstring;
3336: }
3337:
3338: #-- <bdo> tag (end tag required)
3339: sub start_bdo {
3340: my ($target,$token) = @_;
3341: my $currentstring = '';
3342: if ($target eq 'web' || $target eq 'webgrade') {
3343: $currentstring = $token->[4];
3344: }
3345: return $currentstring;
3346: }
3347:
3348: sub end_bdo {
3349: my ($target,$token) = @_;
3350: my $currentstring = '';
3351: if ($target eq 'web' || $target eq 'webgrade') {
3352: $currentstring = $token->[2];
3353: }
3354: return $currentstring;
3355: }
3356:
3357: #-- <bgsound> tag (end tag optional)
3358: sub start_bgsound {
3359: my ($target,$token) = @_;
3360: my $currentstring = '';
3361: if ($target eq 'web' || $target eq 'webgrade') {
3362: $currentstring = $token->[4];
3363: }
3364: return $currentstring;
3365: }
3366:
3367: sub end_bgsound {
3368: my ($target,$token) = @_;
3369: my $currentstring = '';
3370: if ($target eq 'web' || $target eq 'webgrade') {
3371: $currentstring = $token->[2];
3372: }
3373: return $currentstring;
3374: }
3375:
3376: #-- <blink> tag (end tag required)
3377: sub start_blink {
3378: my ($target,$token) = @_;
3379: my $currentstring = '';
3380: if ($target eq 'web' || $target eq 'webgrade') {
3381: $currentstring = $token->[4];
3382: }
3383: return $currentstring;
3384: }
3385:
3386: sub end_blink {
3387: my ($target,$token) = @_;
3388: my $currentstring = '';
3389: if ($target eq 'web' || $target eq 'webgrade') {
3390: $currentstring = $token->[2];
3391: }
3392: return $currentstring;
3393: }
3394:
3395: #-- <blockquote> tag (end tag required)
3396: sub start_blockquote {
3397: my ($target,$token) = @_;
3398: my $currentstring = &end_p(); # Close any unclosed <p>
3399: if ($target eq 'web' || $target eq 'webgrade') {
3400: $currentstring .= $token->[4];
3401: }
3402: if ($target eq 'tex') {
3403: $currentstring .= '\begin{quote}';
3404: }
3405: return $currentstring;
3406: }
3407:
3408: sub end_blockquote {
3409: my ($target,$token) = @_;
3410: my $currentstring = '';
3411: if ($target eq 'web' || $target eq 'webgrade') {
3412: $currentstring = $token->[2];
3413: }
3414: if ($target eq 'tex') {
3415: $currentstring = '\end{quote}';
3416: }
3417: return $currentstring;
3418: }
3419:
3420: #-- <button> tag (end tag required)
3421: sub start_button {
3422: my ($target,$token) = @_;
3423: my $currentstring = '';
3424: if ($target eq 'web' || $target eq 'webgrade') {
3425: $currentstring = $token->[4];
3426: }
3427: return $currentstring;
3428: }
3429:
3430: sub end_button {
3431: my ($target,$token) = @_;
3432: my $currentstring = '';
3433: if ($target eq 'web' || $target eq 'webgrade') {
3434: $currentstring = $token->[2];
3435: }
3436: return $currentstring;
3437: }
3438:
3439: #-- <caption> tag (end tag required)
3440: sub start_caption {
3441: my ($target,$token) = @_;
3442: my $currentstring = '';
3443: if ($target eq 'web' || $target eq 'webgrade') {
3444: $currentstring = $token->[4];
3445: }
3446: return $currentstring;
3447: }
3448:
3449: sub end_caption {
3450: my ($target,$token) = @_;
3451: my $currentstring = '';
3452: if ($target eq 'web' || $target eq 'webgrade') {
3453: $currentstring = $token->[2];
3454: }
3455: return $currentstring;
3456: }
3457:
3458: #-- <col> tag (end tag forbdden)
3459: sub start_col {
3460: my ($target,$token) = @_;
3461: my $currentstring = '';
3462: if ($target eq 'web' || $target eq 'webgrade') {
3463: $currentstring = $token->[4];
3464: }
3465: return $currentstring;
3466: }
3467:
3468: sub end_col {
3469: my ($target,$token) = @_;
3470: my $currentstring = '';
3471: if ($target eq 'web' || $target eq 'webgrade') {
3472: $currentstring = $token->[2];
3473: }
3474: return $currentstring;
3475: }
3476:
3477: #-- <colgroup> tag (end tag optional)
3478: sub start_colgroup {
3479: my ($target,$token) = @_;
3480: my $currentstring = '';
3481: if ($target eq 'web' || $target eq 'webgrade') {
3482: $currentstring = $token->[4];
3483: }
3484: return $currentstring;
3485: }
3486:
3487: sub end_colgroup {
3488: my ($target,$token) = @_;
3489: my $currentstring = '';
3490: if ($target eq 'web' || $target eq 'webgrade') {
3491: $currentstring = $token->[2];
3492: }
3493: return $currentstring;
3494: }
3495:
3496: #-- <del> tag (end tag required)
3497: sub start_del {
3498: my ($target,$token) = @_;
3499: my $currentstring = '';
3500: if ($target eq 'web' || $target eq 'webgrade') {
3501: $currentstring = $token->[4];
3502: }
3503: return $currentstring;
3504: }
3505:
3506: sub end_del {
3507: my ($target,$token) = @_;
3508: my $currentstring = '';
3509: if ($target eq 'web' || $target eq 'webgrade') {
3510: $currentstring = $token->[2];
3511: }
3512: return $currentstring;
3513: }
3514:
3515: #-- <fieldset> tag (end tag required)
3516: sub start_fieldset {
3517: my ($target,$token) = @_;
3518: my $currentstring = '';
3519: if ($target eq 'web' || $target eq 'webgrade') {
3520: $currentstring = $token->[4];
3521: }
3522: return $currentstring;
3523: }
3524:
3525: sub end_fieldset {
3526: my ($target,$token) = @_;
3527: my $currentstring = '';
3528: if ($target eq 'web' || $target eq 'webgrade') {
3529: $currentstring = $token->[2];
3530: }
3531: return $currentstring;
3532: }
3533:
3534: #-- <frame> tag (end tag forbidden)
3535: sub start_frame {
3536: my ($target,$token) = @_;
3537: my $currentstring = '';
3538: if ($target eq 'web' || $target eq 'webgrade') {
3539: $currentstring = $token->[4];
3540: }
3541: return $currentstring;
3542: }
3543:
3544: sub end_frame {
3545: my ($target,$token) = @_;
3546: my $currentstring = '';
3547: if ($target eq 'web' || $target eq 'webgrade') {
3548: $currentstring = $token->[2];
3549: }
3550: return $currentstring;
3551: }
3552:
3553: #-- <iframe> tag (end tag required)
3554: sub start_iframe {
3555: my ($target,$token) = @_;
3556: my $currentstring = '';
3557: if ($target eq 'web' || $target eq 'webgrade') {
3558: $currentstring = $token->[4];
3559: }
3560: return $currentstring;
3561: }
3562:
3563: sub end_iframe {
3564: my ($target,$token) = @_;
3565: my $currentstring = '';
3566: if ($target eq 'web' || $target eq 'webgrade') {
3567: $currentstring = $token->[2];
3568: }
3569: return $currentstring;
3570: }
3571:
3572: #-- <ins> tag (end tag required)
3573: sub start_ins {
3574: my ($target,$token) = @_;
3575: my $currentstring = '';
3576: if ($target eq 'web' || $target eq 'webgrade') {
3577: $currentstring = $token->[4];
3578: }
3579: return $currentstring;
3580: }
3581:
3582: sub end_ins {
3583: my ($target,$token) = @_;
3584: my $currentstring = '';
3585: if ($target eq 'web' || $target eq 'webgrade') {
3586: $currentstring = $token->[2];
3587: }
3588: return $currentstring;
3589: }
3590:
3591: #-- <isindex> tag (end tag forbidden)
3592: sub start_isindex {
3593: my ($target,$token) = @_;
3594: my $currentstring = '';
3595: if ($target eq 'web' || $target eq 'webgrade') {
3596: $currentstring = $token->[4];
3597: }
3598: return $currentstring;
3599: }
3600:
3601: sub end_isindex {
3602: my ($target,$token) = @_;
3603: my $currentstring = '';
3604: if ($target eq 'web' || $target eq 'webgrade') {
3605: $currentstring = $token->[2];
3606: }
3607: return $currentstring;
3608: }
3609:
3610: #-- <keygen> tag (end tag forbidden)
3611: sub start_keygen {
3612: my ($target,$token) = @_;
3613: my $currentstring = '';
3614: if ($target eq 'web' || $target eq 'webgrade') {
3615: $currentstring = $token->[4];
3616: }
3617: return $currentstring;
3618: }
3619:
3620: sub end_keygen {
3621: my ($target,$token) = @_;
3622: my $currentstring = '';
3623: if ($target eq 'web' || $target eq 'webgrade') {
3624: $currentstring = $token->[2];
3625: }
3626: return $currentstring;
3627: }
3628:
3629: #-- <label> tag
3630: sub start_label {
3631: my ($target,$token) = @_;
3632: my $currentstring = '';
3633: if ($target eq 'web' || $target eq 'webgrade') {
3634: $currentstring = $token->[4];
3635: }
3636: return $currentstring;
3637: }
3638:
3639: sub end_label {
3640: my ($target,$token) = @_;
3641: my $currentstring = '';
3642: if ($target eq 'web' || $target eq 'webgrade') {
3643: $currentstring = $token->[2];
3644: }
3645: return $currentstring;
3646: }
3647:
3648: #-- <layer> tag (end tag required)
3649: sub start_layer {
3650: my ($target,$token) = @_;
3651: my $currentstring = '';
3652: if ($target eq 'web' || $target eq 'webgrade') {
3653: $currentstring = $token->[4];
3654: }
3655: return $currentstring;
3656: }
3657:
3658: sub end_layer {
3659: my ($target,$token) = @_;
3660: my $currentstring = '';
3661: if ($target eq 'web' || $target eq 'webgrade') {
3662: $currentstring = $token->[2];
3663: }
3664: return $currentstring;
3665: }
3666:
3667: #-- <legend> tag (end tag required)
3668: sub start_legend {
3669: my ($target,$token) = @_;
3670: my $currentstring = '';
3671: if ($target eq 'web' || $target eq 'webgrade') {
3672: $currentstring = $token->[4];
3673: }
3674: return $currentstring;
3675: }
3676:
3677: sub end_legend {
3678: my ($target,$token) = @_;
3679: my $currentstring = '';
3680: if ($target eq 'web' || $target eq 'webgrade') {
3681: $currentstring = $token->[2];
3682: }
3683: return $currentstring;
3684: }
3685:
3686: #-- <link> tag (end tag forbidden)
3687: sub start_link {
3688: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3689: my $currentstring = '';
3690: if ($target eq 'web' || $target eq 'webgrade') {
3691: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3692: undef,1);
3693: &Apache::lonxml::extlink($href);
3694: $currentstring = $token->[4];
3695: }
3696: return $currentstring;
3697: }
3698:
3699: sub end_link {
3700: my ($target,$token) = @_;
3701: my $currentstring = '';
3702: if ($target eq 'web' || $target eq 'webgrade') {
3703: $currentstring = $token->[2];
3704: }
3705: return $currentstring;
3706: }
3707:
3708: #-- <marquee> tag (end tag optional)
3709: sub start_marquee {
3710: my ($target,$token) = @_;
3711: my $currentstring = '';
3712: if ($target eq 'web' || $target eq 'webgrade') {
3713: $currentstring = $token->[4];
3714: }
3715: return $currentstring;
3716: }
3717:
3718: sub end_marquee {
3719: my ($target,$token) = @_;
3720: my $currentstring = '';
3721: if ($target eq 'web' || $target eq 'webgrade') {
3722: $currentstring = $token->[2];
3723: }
3724: return $currentstring;
3725: }
3726:
3727: #-- <multicol> tag (end tag required)
3728: sub start_multicol {
3729: my ($target,$token) = @_;
3730: my $currentstring = &end_p(); # Close any pending <p>
3731: if ($target eq 'web' || $target eq 'webgrade') {
3732: $currentstring .= $token->[4];
3733: }
3734: return $currentstring;
3735: }
3736:
3737: sub end_multicol {
3738: my ($target,$token) = @_;
3739: my $currentstring = '';
3740: if ($target eq 'web' || $target eq 'webgrade') {
3741: $currentstring = $token->[2];
3742: }
3743: return $currentstring;
3744: }
3745:
3746: #-- <nobr> tag (end tag required)
3747: sub start_nobr {
3748: my ($target,$token) = @_;
3749: my $currentstring = '';
3750: if ($target eq 'web' || $target eq 'webgrade') {
3751: $currentstring = $token->[4];
3752: } elsif ($target eq 'tex') {
3753: $currentstring='\mbox{';
3754: }
3755: return $currentstring;
3756: }
3757:
3758: sub end_nobr {
3759: my ($target,$token) = @_;
3760: my $currentstring = '';
3761: if ($target eq 'web' || $target eq 'webgrade') {
3762: $currentstring = $token->[2];
3763: } elsif ($target eq 'tex') {
3764: $currentstring='}';
3765: }
3766: return $currentstring;
3767: }
3768:
3769: #-- <noembed> tag (end tag required)
3770: sub start_noembed {
3771: my ($target,$token) = @_;
3772: my $currentstring = '';
3773: if ($target eq 'web' || $target eq 'webgrade') {
3774: $currentstring = $token->[4];
3775: }
3776: return $currentstring;
3777: }
3778:
3779: sub end_noembed {
3780: my ($target,$token) = @_;
3781: my $currentstring = '';
3782: if ($target eq 'web' || $target eq 'webgrade') {
3783: $currentstring = $token->[2];
3784: }
3785: return $currentstring;
3786: }
3787:
3788: #-- <noframes> tag (end tag required)
3789: sub start_noframes {
3790: my ($target,$token) = @_;
3791: my $currentstring = '';
3792: if ($target eq 'web' || $target eq 'webgrade') {
3793: $currentstring = $token->[4];
3794: }
3795: return $currentstring;
3796: }
3797:
3798: sub end_noframes {
3799: my ($target,$token) = @_;
3800: my $currentstring = '';
3801: if ($target eq 'web' || $target eq 'webgrade') {
3802: $currentstring = $token->[2];
3803: }
3804: return $currentstring;
3805: }
3806:
3807: #-- <nolayer> tag (end tag required)
3808: sub start_nolayer {
3809: my ($target,$token) = @_;
3810: my $currentstring = '';
3811: if ($target eq 'web' || $target eq 'webgrade') {
3812: $currentstring = $token->[4];
3813: }
3814: return $currentstring;
3815: }
3816:
3817: sub end_nolayer {
3818: my ($target,$token) = @_;
3819: my $currentstring = '';
3820: if ($target eq 'web' || $target eq 'webgrade') {
3821: $currentstring = $token->[2];
3822: }
3823: return $currentstring;
3824: }
3825:
3826: #-- <noscript> tag (end tag required)
3827: sub start_noscript {
3828: my ($target,$token) = @_;
3829: my $currentstring = '';
3830: if ($target eq 'web' || $target eq 'webgrade') {
3831: $currentstring = $token->[4];
3832: }
3833: return $currentstring;
3834: }
3835:
3836: sub end_noscript {
3837: my ($target,$token) = @_;
3838: my $currentstring = '';
3839: if ($target eq 'web' || $target eq 'webgrade') {
3840: $currentstring = $token->[2];
3841: }
3842: return $currentstring;
3843: }
3844:
3845: #-- <object> tag (end tag required)
3846: sub start_object {
3847: my ($target,$token) = @_;
3848: my $currentstring = '';
3849: if ($target eq 'web' || $target eq 'webgrade') {
3850: $currentstring = $token->[4];
3851: }
3852: return $currentstring;
3853: }
3854:
3855: sub end_object {
3856: my ($target,$token) = @_;
3857: my $currentstring = '';
3858: if ($target eq 'web' || $target eq 'webgrade') {
3859: $currentstring = $token->[2];
3860: }
3861: return $currentstring;
3862: }
3863:
3864: #-- <optgroup> tag (end tag required)
3865: sub start_optgroup {
3866: my ($target,$token) = @_;
3867: my $currentstring = '';
3868: if ($target eq 'web' || $target eq 'webgrade') {
3869: $currentstring = $token->[4];
3870: }
3871: return $currentstring;
3872: }
3873:
3874: sub end_optgroup {
3875: my ($target,$token) = @_;
3876: my $currentstring = '';
3877: if ($target eq 'web' || $target eq 'webgrade') {
3878: $currentstring = $token->[2];
3879: }
3880: return $currentstring;
3881: }
3882:
3883: #-- <samp> tag (end tag required)
3884: sub start_samp {
3885: my ($target,$token) = @_;
3886: my $currentstring = '';
3887: if ($target eq 'web' || $target eq 'webgrade') {
3888: $currentstring = $token->[4];
3889: } elsif ($target eq 'tex') {
3890: $currentstring='\texttt{';
3891: }
3892: return $currentstring;
3893: }
3894:
3895: sub end_samp {
3896: my ($target,$token) = @_;
3897: my $currentstring = '';
3898: if ($target eq 'web' || $target eq 'webgrade') {
3899: $currentstring = $token->[2];
3900: } elsif ($target eq 'tex') {
3901: $currentstring='}';
3902: }
3903: return $currentstring;
3904: }
3905:
3906: #-- <server> tag
3907: sub start_server {
3908: my ($target,$token) = @_;
3909: my $currentstring = '';
3910: if ($target eq 'web' || $target eq 'webgrade') {
3911: $currentstring = $token->[4];
3912: }
3913: return $currentstring;
3914: }
3915:
3916: sub end_server {
3917: my ($target,$token) = @_;
3918: my $currentstring = '';
3919: if ($target eq 'web' || $target eq 'webgrade') {
3920: $currentstring = $token->[2];
3921: }
3922: return $currentstring;
3923: }
3924:
3925: #-- <spacer> tag (end tag forbidden)
3926: sub start_spacer {
3927: my ($target,$token) = @_;
3928: my $currentstring = &end_p(); # Close off any open <p> tag.
3929: if ($target eq 'web' || $target eq 'webgrade') {
3930: $currentstring .= $token->[4];
3931: }
3932: return $currentstring;
3933: }
3934:
3935: sub end_spacer {
3936: my ($target,$token) = @_;
3937: my $currentstring = '';
3938: if ($target eq 'web' || $target eq 'webgrade') {
3939: $currentstring = $token->[2];
3940: }
3941: return $currentstring;
3942: }
3943:
3944: #-- <span> tag (end tag required)
3945: sub start_span {
3946: my ($target,$token) = @_;
3947: my $currentstring = '';
3948: if ($target eq 'web' || $target eq 'webgrade') {
3949: $currentstring = $token->[4];
3950: }
3951: return $currentstring;
3952: }
3953:
3954: sub end_span {
3955: my ($target,$token) = @_;
3956: my $currentstring = '';
3957: if ($target eq 'web' || $target eq 'webgrade') {
3958: $currentstring = $token->[2];
3959: }
3960: return $currentstring;
3961: }
3962:
3963: #-- <tbody> tag (end tag optional)
3964: sub start_tbody {
3965: my ($target,$token) = @_;
3966: my $currentstring = '';
3967: if ($target eq 'web' || $target eq 'webgrade') {
3968: $currentstring = $token->[4];
3969: }
3970: return $currentstring;
3971: }
3972:
3973: sub end_tbody {
3974: my ($target,$token) = @_;
3975: my $currentstring = '';
3976: if ($target eq 'web' || $target eq 'webgrade') {
3977: $currentstring = $token->[2];
3978: }
3979: return $currentstring;
3980: }
3981:
3982: #-- <tfoot> tag (end tag optional)
3983: sub start_tfoot {
3984: my ($target,$token) = @_;
3985: my $currentstring = '';
3986: if ($target eq 'web' || $target eq 'webgrade') {
3987: $currentstring = $token->[4];
3988: }
3989: return $currentstring;
3990: }
3991:
3992: sub end_tfoot {
3993: my ($target,$token) = @_;
3994: my $currentstring = '';
3995: if ($target eq 'web' || $target eq 'webgrade') {
3996: $currentstring = $token->[2];
3997: }
3998: return $currentstring;
3999: }
4000:
4001: #-- <thead> tag (end tag optional)
4002: sub start_thead {
4003: my ($target,$token) = @_;
4004: my $currentstring = '';
4005: if ($target eq 'web' || $target eq 'webgrade') {
4006: $currentstring = $token->[4];
4007: }
4008: return $currentstring;
4009: }
4010:
4011: sub end_thead {
4012: my ($target,$token) = @_;
4013: my $currentstring = '';
4014: if ($target eq 'web' || $target eq 'webgrade') {
4015: $currentstring = $token->[2];
4016: }
4017: return $currentstring;
4018: }
4019:
4020: #-- <var> tag
4021: sub start_var {
4022: my ($target,$token) = @_;
4023: my $currentstring = '';
4024: if ($target eq 'web' || $target eq 'webgrade') {
4025: $currentstring = $token->[4];
4026: } elsif ($target eq 'tex') {
4027: $currentstring = '\textit{';
4028: }
4029: return $currentstring;
4030: }
4031:
4032: sub end_var {
4033: my ($target,$token) = @_;
4034: my $currentstring = '';
4035: if ($target eq 'web' || $target eq 'webgrade') {
4036: $currentstring = $token->[2];
4037: } elsif ($target eq 'tex') {
4038: $currentstring = '}';
4039: }
4040: return $currentstring;
4041: }
4042:
4043: #-- <wbr> tag (end tag forbidden)
4044: sub start_wbr {
4045: my ($target,$token) = @_;
4046: my $currentstring = '';
4047: if ($target eq 'web' || $target eq 'webgrade') {
4048: $currentstring = $token->[4];
4049: }
4050: return $currentstring;
4051: }
4052:
4053: sub end_wbr {
4054: my ($target,$token) = @_;
4055: my $currentstring = '';
4056: if ($target eq 'web' || $target eq 'webgrade') {
4057: $currentstring = $token->[2];
4058: }
4059: return $currentstring;
4060: }
4061:
4062: #-- <hideweboutput> tag
4063: sub start_hideweboutput {
4064: my ($target,$token) = @_;
4065: if ($target eq 'web' || $target eq 'webgrade') {
4066: &Apache::lonxml::startredirection();
4067: }
4068: return '';
4069: }
4070:
4071: sub end_hideweboutput {
4072: my ($target,$token) = @_;
4073: my $currentstring = '';
4074: if ($target eq 'web' || $target eq 'webgrade') {
4075: $currentstring = &Apache::lonxml::endredirection();
4076: }
4077: return '';
4078: }
4079:
4080:
4081: sub image_replication {
4082: my $src = shift;
4083: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4084: #replicates eps or ps
4085: my $epssrc = my $pssrc = $src;
4086: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4087: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4088: if (not -e $epssrc && not -e $pssrc) {
4089: my $result=&Apache::lonnet::repcopy($epssrc);
4090: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4091: }
4092: return '';
4093: }
4094: #
4095: # Get correct sizing parameter for an image given
4096: # it's initial ht. and wid. This allows sizing of
4097: # images that are generated on-the-fly (e.g. gnuplot)
4098: # as well as serving as a utility for image_size.
4099: #
4100: # Parameter:
4101: # height_param
4102: # width_param - Initial picture dimensions.
4103: # scaling - A scale factor.
4104: # parstack, - the current stack of tag attributes
4105: # from the xml parser
4106: # safeeval, - pointer to the safespace
4107: # depth, - from what level in the stack to look for attributes
4108: # (assumes -1 if unspecified)
4109: # cis - look for attrubutes case insensitively
4110: # (assumes false)
4111: #
4112: # Returns:
4113: # height, width - new dimensions.
4114: #
4115: sub resize_image {
4116: my ($height_param, $width_param, $scaling,
4117: $parstack, $safeeval, $depth, $cis) = @_;
4118:
4119: # First apply the scaling...
4120:
4121: $height_param = $height_param * $scaling;
4122: $width_param = $width_param * $scaling;
4123:
4124: #do we have any specified LaTeX size of the picture?
4125: my $toget='TeXwidth';
4126: if ($cis) {
4127: $toget=lc($toget);
4128: }
4129: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4130: $safeeval,$depth,$cis);
4131: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4132: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4133: $safeeval,$depth,$cis);
4134: #do we have any specified web size of the picture?
4135: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4136: $depth,1);
4137: if ($TeXwidth) {
4138: my $old_width_param=$width_param;
4139: if ($TeXwidth=~/(\d+)\s*\%/) {
4140: $width_param = $1*$env{'form.textwidth'}/100;
4141: } else {
4142: $width_param = $TeXwidth;
4143: }
4144: if ($TeXheight) {
4145: $height_param = $TeXheight;
4146: } elsif ($old_width_param) {
4147: $height_param=$TeXwidth/$old_width_param*$height_param;
4148: }
4149: } elsif ($TeXheight) {
4150: $height_param = $TeXheight;
4151: if ($height_param) {
4152: $width_param = $TeXheight/$height_param*$width_param;
4153: }
4154: } elsif ($width) {
4155: my $old_width_param=$width_param;
4156: $width_param = $width*$scaling;
4157: if ($old_width_param) {
4158: $height_param=$width_param/$old_width_param*$height_param;
4159: }
4160: }
4161: if ($width_param > $env{'form.textwidth'}) {
4162: my $old_width_param=$width_param;
4163: $width_param =0.95*$env{'form.textwidth'};
4164: if ($old_width_param) {
4165: $height_param=$width_param/$old_width_param*$height_param;
4166: }
4167: }
4168:
4169: return ($height_param, $width_param);
4170: }
4171:
4172: sub image_size {
4173: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4174:
4175: #size of image from gif/jpg/jpeg/png
4176: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4177: if (-e $ressrc) {
4178: $src = $ressrc;
4179: }
4180: my $image = Image::Magick->new;
4181: my $current_figure = $image->Read($src);
4182: my $width_param = $image->Get('width');
4183: my $height_param = $image->Get('height');
4184: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4185: undef($image);
4186:
4187: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4188: $scaling, $parstack, $safeeval,
4189: $depth, $cis);
4190:
4191: return ($height_param, $width_param);
4192: }
4193:
4194: sub image_width {
4195: my ($height, $width) = &image_size(@_);
4196: return $width;
4197: }
4198: # Not yet 100% sure this is correct in all circumstances..
4199: # due to my uncertainty about mods to image_size.
4200: #
4201: sub image_height {
4202: my ($height, $width) = &image_size(@_);
4203: return $height;
4204: }
4205:
4206: sub get_eps_image {
4207: my ($src)=@_;
4208: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4209:
4210: # In order to prevent the substitution of the alt text, we need to
4211: # be sure the orig_src file is on system now so:
4212:
4213: if (! -e $orig_src) {
4214: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4215: }
4216: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4217: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4218: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4219: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4220: &Apache::lonxml::debug("Filelocation gives: $src");
4221: if (! -e $src) {
4222: &Apache::lonxml::debug("$src does not exist");
4223: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4224: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4225: #if replication failed try to find ps file
4226: $src=~s/\.eps$/\.ps/;
4227: &Apache::lonxml::debug("Now looking for $src");
4228: #if no ps file try to replicate it.
4229: my $didrepcopy = &Apache::lonnet::repcopy($src);
4230: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4231: if ( (not -e $src) ||
4232: ($didrepcopy ne 'ok')) {
4233: &Apache::lonxml::debug("Failed to find or replicate $src");
4234:
4235: #if replication failed try to produce eps file dynamically
4236: $src=~s/\.ps$/\.eps/;
4237: my $temp_file;
4238: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4239: my $newsrc=$orig_src;
4240: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4241: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4242: print FILE ("$newsrc\n");
4243: close(FILE);
4244: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4245: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4246: if ($sext ne "") { # Put the ext. back in to uniquify.
4247: $src =~ s/\.eps$/$sext.eps/;
4248: }
4249:
4250: }
4251:
4252: }
4253: } else {
4254: # If the postscript file has spaces in its name,
4255: # LaTeX will gratuitiously vomit. Therefore
4256: # queue such files for copy with " " replaced by "_".
4257: # printout.pm will know them by their .ps or .eps extensions.
4258: my $newsrc = $orig_src;
4259: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4260: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4261: print FILE "$src\n";
4262: close FILE;
4263: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4264: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4265: }
4266: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4267: $path =~ s/ /\_/g;
4268: $file =~ s/ /\_/g;
4269: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4270: return ($path.'/',$file);
4271: }
4272:
4273: sub eps_generation {
4274: my ($src,$file,$width_param) = @_;
4275: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4276: my $temp_file = Apache::File->new('>>'.$filename);
4277: print $temp_file "$src\n";
4278: my $newsrc = $src;
4279: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4280: $newsrc=~s{/home/httpd/html/res}{};
4281: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4282: $newsrc=~s{/\./}{/};
4283: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4284: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4285: $newsrc=~s{/home/httpd/lonUsers}{};
4286: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4287: }
4288: if ($newsrc=~m{/userfiles/}) {
4289: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4290: } else {
4291: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4292: }
4293: }
4294:
4295: sub file_path {
4296: my $src=shift;
4297: my ($file,$path);
4298: if ($src =~ m!(.*)/([^/]*)$!) {
4299: $file = $2;
4300: $path = $1.'/';
4301: }
4302: return $file,$path;
4303: }
4304: # Converts a measurement in to mm from any of
4305: # the other valid LaTeX units of measure.
4306: # If the units of measure are missing from the
4307: # parameter, it is assumed to be in and returned
4308: # with mm units of measure
4309: sub recalc {
4310: my $argument = shift;
4311: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4312: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4313: my $value=$1;
4314: my $units=$2;
4315: if ($units eq 'cm') {
4316: $value*=10;
4317: } elsif ($units eq 'in') {
4318: $value*=25.4;
4319: } elsif ($units eq 'pc') {
4320: $value*=(25.4*12/72.27);
4321: } elsif ($units eq 'pt') {
4322: $value*=(25.4/72.27);
4323: }
4324: return $value.' mm';
4325: }
4326:
4327: sub LATEX_length {
4328: my $garbage=shift;
4329: $garbage=~s/^\s+$//;
4330: $garbage=~s/^\s+(\S.*)/$1/;#space before
4331: $garbage=~s/(.*\S)\s+$/$1/;#space after
4332: $garbage=~s/(\s)+/$1/;#only one space
4333: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4334: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4335: $garbage=~s/([^\\])\$/$1/g;#$
4336: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4337: $garbage=~s/(\\alpha|\\beta|\\gamma|\\delta|\\epsilon|\\verepsilon|\\zeta|\\eta|\\theta|\\vartheta|\\iota|\\kappa|\\lambda|\\mu|\\nu|\\xi|\\pi|\\varpi|\\rho|\\varrho|\\sigma|\\varsigma|\\tau|\\upsilon|\\phi|\\varphi|\\chi|\\psi|\\omega|\\Gamma|\\Delta|\\Theta|\\Lambda|\\Xi|\\Pi|\\Sigma|\\Upsilon|\\Phi|\\Psi|\\Omega)/1/g;
4338: $garbage=~s/(\\pm|\\mp|\\times|\\div|\\cdot|\\ast|\\star|\\dagger|\\ddagger|\\amalg|\\cap|\\cup|\\uplus|\\sqcap|\\sqcup|\\vee|\\wedge|\\oplus|\\ominus|\\otimes|\\circ|\\bullet|\\diamond|\\lhd|\\rhd|\\unlhd|\\unrhd|\\oslash|\\odot|\\bigcirc|\\Box|\\Diamond|\\bigtriangleup|\\bigtriangledown|\\triangleleft|\\triangleright|\\setminus|\\wr)/1/g;
4339: $garbage=~s/(\\le|\\ll|\\leq|\\ge|\\geq|\\gg|\\neq|\\doreq|\\sim|\\simeq|\\subset|\\subseteq|\\sqsubset|\\sqsubseteq|\\in|\\vdash|\\models|\\supset|\\supseteq|\\sqsupset|\\sqsupseteq|\\ni|\\dash|\\perp|\\approx|\\cong|\\equiv|\\propto|\\prec|\\preceq|\\parallel|\\asymp|\\smile|\\frown|\\bowtie|\\succ|\\succeq|\\mid)/1/g;
4340: $garbage=~s/(\\not<|\\\\not\\le|\\not\\prec|\\not\\preceq|\\not\\subset|\\not\\subseteq|\\not\\sqsubseteq|\\not\\in|\\not>|\\not\\ge|\\not\\succ|\\notsucceq|\\not\\supset|\\notsupseteq|\\not\\sqsupseteq|\\notin|\\not=|\\not\\equiv|\\not\\sim|\\not\\simeq|\\not\\approx|\\not\\cong|\\not\\asymp)/1/g;
4341: $garbage=~s/(\\leftarrow|\\gets|\\Leftarrow|\\rightarrow|\\to|\\Rightarrow|\\leftrightarrow|\\Leftrightarrow|\\mapsto|\\hookleftarrow|\\leftharpoonup|\\leftkarpoondown|\\rightleftharpoons|\\longleftarrow|\\Longleftarrow|\\longrightarrow|\\Longrightarrow|\\longleftrightarrow|\\Longleftrightarrow|\\longmapsto|\\hookrightarrow|\\rightharpoonup|\\rightharpoondown|\\uparrow|\\Uparrow|\\downarrow|\\Downarrow|\\updownarrow|\\Updownarrow|\\nearrow|\\searrow|\\swarrow|\\nwarrow)/11/g;
4342: $garbage=~s/(\\aleph|\\hbar|\\imath|\\jmath|\\ell|\\wp|\\Re|\\Im|\\mho|\\prime|\\emptyset|\\nabla|\\surd|\\partial|\\top|\\bot|\\vdash|\\dashv|\\forall|\\exists|\\neg|\\flat|\\natural|\\sharp|\\\||\\angle|\\backslash|\\Box|\\Diamond|\\triangle|\\clubsuit|\\diamondsuit|\\heartsuit|\\spadesuit|\\Join|\\infty)/11/g;
4343: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4344: #remove some other LaTeX command
4345: $garbage=~s|\\(\w+)\\|\\|g;
4346: $garbage=~s|\\(\w+)(\s*)|$2|g;
4347: $garbage=~s|\+|11|g;
4348: my $value=length($garbage);
4349: return $value;
4350: }
4351:
4352: # Wrap image 'stuff' inside of the LaTeX required to implement
4353: # alignment:
4354: # align_tex_image(align, latex_rendering, image)
4355: # Where:
4356: # align - The HTML alignment specification.
4357: # latex_rendering - rendering hint for latex.
4358: # image - The LaTeX needed to insert the image itsef.
4359: # width,height - dimensions of the image.
4360: # Returns:
4361: # The 1/2 wrapped image and the stuff required to close the
4362: # wrappage. This allows e.g. randomlabel to insert more stuff
4363: # into the closure.
4364: #
4365: sub align_latex_image {
4366: my ($align, $latex_rendering, $image, $width, $height) = @_;
4367: my $currentstring; # The 1/2 wrapped image.
4368: my $closure; # The closure of the wrappage.
4369: # If there's an alignment specification we need to honor it here.
4370: # For the horizontal alignments, we will also honor the
4371: # value of the latex specfication. The default is parbox,
4372: # and that's used for illegal values too.
4373: #
4374: # Even though we set a default alignment value, the user
4375: # could have given us an illegal value. In that case we
4376: # just use the default alignment of bottom..
4377: $currentstring = "\n% figurewrapping \n";
4378: if ($align eq "top") {
4379: $currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
4380: $closure = '}';
4381: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4382: my $offset = $height/2;
4383: $currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
4384: $closure = '}';
4385: } elsif ($align eq "left") {
4386: if ($latex_rendering eq "parpic") {
4387: $currentstring .= '\parpic[l]{'.$image;
4388: $closure = '}';
4389: } elsif ($latex_rendering eq "parbox") {
4390: $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
4391: .$image;
4392: $closure = '\end{minipage}';
4393: } elsif ($latex_rendering eq "wrapfigure"
4394: || $latex_rendering ne 'none') { # wrapfig render
4395: $currentstring .=
4396: '\begin{wrapfigure}{l}{'.$width.'mm}'
4397: .'\scalebox{1.0}{'.$image;
4398: $closure = '}\end{wrapfigure}';
4399: }
4400: } elsif ($align eq "right") {
4401: if ($latex_rendering eq "parpic") {
4402: $currentstring .= '\parpic[r]{'.$image;
4403: $closure = '}';
4404: } elsif ($latex_rendering eq "parbox") {
4405: $currentstring .= '\begin{minipage}[r]{'.$width.'mm}'
4406: .$image;
4407: $closure = '\end{minipage}';
4408: } elsif ($latex_rendering eq "wrapfigure"
4409: || $latex_rendering ne 'none') { # wrapfig render
4410: $currentstring .=
4411: '\begin{wrapfigure}{r}{'.$width.'mm}'
4412: .'\scalebox{1.0}{'.$image;
4413: $closure = '}\end{wrapfigure}';
4414: }
4415: } else { # Bottom is also default.
4416: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4417: $currentstring .= "{$image";
4418: $closure = '}';
4419: }
4420: $currentstring .= "\n% end wrappage\n";
4421: $closure = "\n% Begin closure\n".$closure."\n% End closure\n";
4422: return ($currentstring, $closure);
4423: }
4424:
4425: # is_inside_of $tagstack $tag
4426: # This sub returns true if the current state of Xml processing
4427: # is inside of the tag.
4428: # Parameters:
4429: # tagstack - The tagstack from the parser.
4430: # tag - The tag (without the <>'s.).
4431: # Sample usage:
4432: # if (is_inside_of($tagstack "table")) {
4433: # # I'm in a table....
4434: # }
4435: sub is_inside_of {
4436: my ($tagstack, $tag) = @_;
4437: my @stack = @$tagstack;
4438: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4439: if ($stack[$i] eq $tag) {
4440: return 1;
4441: }
4442: }
4443: return 0;
4444: }
4445:
4446:
4447: 1;
4448: __END__
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