1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.353 2007/01/22 11:28:08 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: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1231: $currentstring .= '\strut \\\\ \strut ';
1232: } else { # Honor break in simple <sup></sup>
1233: $currentstring .= '}} \strut \\\\ \strut \ensuremath{^{';
1234: }
1235: }
1236: return $currentstring;
1237: }
1238:
1239: sub end_br {
1240: my ($target,$token) = @_;
1241: my $currentstring = '';
1242: if ($target eq 'web' || $target eq 'webgrade') {
1243: $currentstring .= $token->[2];
1244: }
1245: return $currentstring;
1246: }
1247:
1248: #-- <big> tag (end tag required)
1249: sub start_big {
1250: my ($target,$token) = @_;
1251: my $currentstring = '';
1252: if ($target eq 'web' || $target eq 'webgrade') {
1253: $currentstring .= $token->[4];
1254: } elsif ($target eq 'tex') {
1255: $currentstring .= '{\large ';
1256: }
1257: return $currentstring;
1258: }
1259:
1260: sub end_big {
1261: my ($target,$token) = @_;
1262: my $currentstring = '';
1263: if ($target eq 'web' || $target eq 'webgrade') {
1264: $currentstring .= $token->[2];
1265: } elsif ($target eq 'tex') {
1266: $currentstring .= '}';
1267: }
1268: return $currentstring;
1269: }
1270:
1271: #-- <small> tag (end tag required)
1272: sub start_small {
1273: my ($target,$token) = @_;
1274: my $currentstring = '';
1275: if ($target eq 'web' || $target eq 'webgrade') {
1276: $currentstring .= $token->[4];
1277: } elsif ($target eq 'tex') {
1278: $currentstring .= '{\footnotesize ';
1279: }
1280: return $currentstring;
1281: }
1282:
1283: sub end_small {
1284: my ($target,$token) = @_;
1285: my $currentstring = '';
1286: if ($target eq 'web' || $target eq 'webgrade') {
1287: $currentstring .= $token->[2];
1288: } elsif ($target eq 'tex') {
1289: $currentstring .= '}';
1290: }
1291: return $currentstring;
1292: }
1293:
1294: #-- <basefont> tag (end tag forbidden)
1295: sub start_basefont {
1296: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1297: my $currentstring = '';
1298: if ($target eq 'web' || $target eq 'webgrade') {
1299: $currentstring = $token->[4];
1300: } elsif ($target eq 'tex') {
1301: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1302: if (defined $basesize) {
1303: $currentstring = '{\\'.$basesize.' ';
1304: }
1305: }
1306: return $currentstring;
1307: }
1308:
1309: sub end_basefont {
1310: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1311: my $currentstring = '';
1312: if ($target eq 'web' || $target eq 'webgrade') {
1313: $currentstring = $token->[4];
1314: } elsif ($target eq 'tex') {
1315: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1316: if (defined $basesize) {
1317: $currentstring = '}';
1318: }
1319: }
1320: return $currentstring;
1321: }
1322:
1323: #-- <font> tag (end tag required)
1324: sub start_font {
1325: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1326: my $currentstring = '';
1327: if ($target eq 'web' || $target eq 'webgrade') {
1328: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1329: if ($face!~/symbol/i) {
1330: if (($env{'browser.fontenhance'} eq 'on') ||
1331: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1332: }
1333: $currentstring = $token->[4];
1334: } elsif ($target eq 'tex') {
1335: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1336: if (defined $fontsize) {
1337: $currentstring = '{\\'.$fontsize.' ';
1338: }
1339: }
1340: return $currentstring;
1341: }
1342:
1343: sub end_font {
1344: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1345: my $currentstring = '';
1346: if ($target eq 'web' || $target eq 'webgrade') {
1347: $currentstring = $token->[2];
1348: } elsif ($target eq 'tex') {
1349: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1350: if (defined $fontsize) {
1351: $currentstring = '}';
1352: }
1353: }
1354: return $currentstring;
1355: }
1356:
1357: #-- <strike> tag (end tag required)
1358: sub start_strike {
1359: my ($target,$token) = @_;
1360: my $currentstring = '';
1361: if ($target eq 'web' || $target eq 'webgrade') {
1362: $currentstring .= $token->[4];
1363: } elsif ($target eq 'tex') {
1364: &Apache::lonxml::startredirection();
1365: }
1366: return $currentstring;
1367: }
1368:
1369: sub end_strike {
1370: my ($target,$token) = @_;
1371: my $currentstring = '';
1372: if ($target eq 'web' || $target eq 'webgrade') {
1373: $currentstring .= $token->[2];
1374: } elsif ($target eq 'tex') {
1375: $currentstring=&Apache::lonxml::endredirection();
1376: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1377: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1378: $currentstring=~s/(\S)\s*$/$1\}/;
1379: }
1380: return $currentstring;
1381: }
1382:
1383: #-- <s> tag (end tag required)
1384: sub start_s {
1385: my ($target,$token) = @_;
1386: my $currentstring = '';
1387: if ($target eq 'web' || $target eq 'webgrade') {
1388: $currentstring .= $token->[4];
1389: } elsif ($target eq 'tex') {
1390: &Apache::lonxml::startredirection();
1391: }
1392: return $currentstring;
1393: }
1394:
1395: sub end_s {
1396: my ($target,$token) = @_;
1397: my $currentstring = '';
1398: if ($target eq 'web' || $target eq 'webgrade') {
1399: $currentstring .= $token->[2];
1400: } elsif ($target eq 'tex') {
1401: $currentstring=&Apache::lonxml::endredirection();
1402: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1403: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1404: $currentstring=~s/(\S)\s*$/$1\}/;
1405: }
1406: return $currentstring;
1407: }
1408:
1409: #-- <sub> tag (end tag required)
1410: sub start_sub {
1411: my ($target,$token) = @_;
1412: my $currentstring = '';
1413: if ($target eq 'web' || $target eq 'webgrade') {
1414: $currentstring .= $token->[4];
1415: } elsif ($target eq 'tex') {
1416: $currentstring .= '\ensuremath{_{';
1417: }
1418: return $currentstring;
1419: }
1420:
1421: sub end_sub {
1422: my ($target,$token) = @_;
1423: my $currentstring = '';
1424: if ($target eq 'web' || $target eq 'webgrade') {
1425: $currentstring .= $token->[2];
1426: } elsif ($target eq 'tex') {
1427: $currentstring .= '}}';
1428: }
1429: return $currentstring;
1430: }
1431:
1432: #-- <sup> tag (end tag required)
1433: sub start_sup {
1434: my ($target,$token) = @_;
1435: my $currentstring = '';
1436: if ($target eq 'web' || $target eq 'webgrade') {
1437: $currentstring .= $token->[4];
1438: } elsif ($target eq 'tex') {
1439: $currentstring .= '\ensuremath{^{';
1440: }
1441: return $currentstring;
1442: }
1443:
1444: sub end_sup {
1445: my ($target,$token) = @_;
1446: my $currentstring = '';
1447: if ($target eq 'web' || $target eq 'webgrade') {
1448: $currentstring .= $token->[2];
1449: } elsif ($target eq 'tex') {
1450: $currentstring .= '}}';
1451: }
1452: return $currentstring;
1453: }
1454:
1455: #-- <hr> tag (end tag forbidden)
1456: sub start_hr {
1457: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1458: my $currentstring = &end_p(); # End enclosing para.
1459: if ($target eq 'web' || $target eq 'webgrade') {
1460: $currentstring .= $token->[4];
1461: } elsif ($target eq 'tex') {
1462: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1463: if (defined $LaTeXwidth) {
1464: if ($LaTeXwidth=~/^%/) {
1465: substr($LaTeXwidth,0,1)='';
1466: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1467: }
1468: } else {
1469: $LaTeXwidth ='0.9\textwidth';
1470: }
1471: my ($pre,$post);
1472: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1473: if (($align eq 'center') || (not defined $align)) {
1474: $pre=''; $post='';
1475: } elsif ($align eq 'left') {
1476: $pre='\rlap{'; $post='} \hfill';
1477: } elsif ($align eq 'right') {
1478: $pre=' \hfill \llap{'; $post='}';
1479: }
1480: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1481: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1482: }
1483: return $currentstring;
1484: }
1485:
1486: sub end_hr {
1487: my ($target,$token) = @_;
1488: my $currentstring = '';
1489: if ($target eq 'web' || $target eq 'webgrade') {
1490: $currentstring .= $token->[2];
1491: }
1492: return $currentstring;
1493: }
1494:
1495: #-- <div> tag (end tag required)
1496: {
1497:
1498: # Since div can be nested, the stack below is used
1499: # in 'tex' mode to store the ending strings
1500: # for the div stack.
1501:
1502: my @div_end_stack;
1503:
1504: sub start_div {
1505: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1506: my $currentstring = &end_p(); # Close enclosing para.
1507: if ($target eq 'web' || $target eq 'webgrade') {
1508: $currentstring .= $token->[4];
1509: }
1510: if ($target eq 'tex') {
1511: # 4 possible alignments: left, right, center, and -missing-.
1512:
1513: my $endstring = '';
1514:
1515: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1516: $safeeval, undef, 1));
1517: if ($align eq 'center') {
1518: $currentstring .= '\begin{center}';
1519: $endstring = '\end{center}';
1520: if (&is_inside_of($tagstack, "table")) {
1521: $currentstring = ¢er_correction().$currentstring;
1522: }
1523: }
1524: elsif ($align eq 'right') {
1525: $currentstring .= '\begin{flushright}';
1526: $endstring .= '\end{flushright}';
1527: } elsif ($align eq 'left') {
1528: $currentstring .= '\begin{flushleft}';
1529: $endstring = '\end{flushleft}';
1530: } else {
1531:
1532: }
1533: $currentstring .= "\n"; # For human readability.
1534: $endstring = "\n$endstring\n"; # For human readability
1535: push(@div_end_stack, $endstring);
1536: }
1537: return $currentstring;
1538: }
1539:
1540: sub end_div {
1541: my ($target,$token) = @_;
1542: my $currentstring = '';
1543: if ($target eq 'web' || $target eq 'webgrade') {
1544: $currentstring .= $token->[2];
1545: }
1546: if ($target eq 'tex') {
1547: my $endstring = pop @div_end_stack;
1548: $currentstring .= $endstring;
1549: }
1550: return $currentstring;
1551: }
1552: }
1553:
1554: #-- <a> tag (end tag required)
1555: sub start_a {
1556: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1557: my $currentstring = '';
1558: if ($target eq 'web' || $target eq 'webgrade') {
1559: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1560: undef,1);
1561: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1562: }
1563: return $currentstring;
1564: }
1565:
1566: sub end_a {
1567: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1568: my $currentstring = '';
1569: if ($target eq 'web' || $target eq 'webgrade') {
1570: $currentstring .= $token->[2];
1571: }
1572: if ($target eq 'tex') {
1573: my $href =
1574: &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1575: my $name =
1576: &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1577: if ($href =~ /\S/) {
1578: $href =~ s/([^\\])%/$1\\\%/g;
1579: $currentstring .= ' ({\tt URI:'.&Apache::lonxml::latex_special_symbols($href).'})';
1580: } elsif ($name =~ /\S/) {
1581: $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
1582: } else {
1583: $currentstring.='';
1584: }
1585: }
1586: return $currentstring;
1587: }
1588:
1589: #-- <li> tag (end tag optional)
1590: sub start_li {
1591: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1592: my $currentstring = '';
1593: if ($target eq 'web' || $target eq 'webgrade') {
1594: $currentstring = $token->[4];
1595: } elsif ($target eq 'tex') {
1596: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1597: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1598: #FIXME need to support types i and I
1599: if ($type=~/disc/) {
1600: $currentstring .= ' \item[$\bullet$] ';
1601: } elsif ($type=~/circle/) {
1602: $currentstring .= ' \item[$\circ$] ';
1603: } elsif ($type=~/square/) {
1604: $currentstring .= ' \item[$\diamond$] ';
1605: } elsif ($type eq '1') {
1606: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1607: } elsif ($type eq 'A') {
1608: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1609: } elsif ($type eq 'a') {
1610: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1611: } elsif ($value ne '') {
1612: $currentstring .= ' \item['.$value.'] ';
1613: } else {
1614: $currentstring .= ' \item ';
1615: }
1616: $Apache::londefdef::list_index++;
1617: }
1618: return $currentstring;
1619: }
1620:
1621: sub end_li {
1622: my ($target,$token) = @_;
1623: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1624: if ($target eq 'web' || $target eq 'webgrade') {
1625: $currentstring .= $token->[2];
1626: }
1627: return $currentstring;
1628: }
1629:
1630: #-- <u> tag (end tag required)
1631: sub start_u {
1632: my ($target,$token) = @_;
1633: my $currentstring = '';
1634: if ($target eq 'web' || $target eq 'webgrade') {
1635: $currentstring .= $token->[4];
1636: } elsif ($target eq 'tex') {
1637: &Apache::lonxml::startredirection();
1638: }
1639: return $currentstring;
1640: }
1641:
1642: sub end_u {
1643: my ($target,$token) = @_;
1644: my $currentstring = '';
1645: if ($target eq 'web' || $target eq 'webgrade') {
1646: $currentstring .= $token->[2];
1647: } elsif ($target eq 'tex') {
1648: $currentstring=&Apache::lonxml::endredirection();
1649: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1650: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1651: $currentstring=~s/(\S)\s*$/$1\}/;
1652: }
1653: return $currentstring;
1654: }
1655:
1656: #-- <ul> tag (end tag required)
1657: sub start_ul {
1658: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1659: my $currentstring = &end_p(); # Close off enclosing list.
1660: if ($target eq 'web' || $target eq 'webgrade') {
1661: $currentstring .= $token->[4];
1662: } elsif ($target eq 'tex') {
1663: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1664: $Apache::londefdef::list_index=0;
1665: if ($TeXtype eq 'disc') {
1666: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1667: '\renewcommand{\labelitemii}{$\bullet$}'.
1668: '\renewcommand{\labelitemiii}{$\bullet$}'.
1669: '\renewcommand{\labelitemiv}{$\bullet$}';
1670: } elsif ($TeXtype eq 'circle') {
1671: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1672: '\renewcommand{\labelitemii}{$\circ$}'.
1673: '\renewcommand{\labelitemiii}{$\circ$}'.
1674: '\renewcommand{\labelitemiv}{$\circ$}';
1675: } elsif ($TeXtype eq 'square') {
1676: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1677: '\renewcommand{\labelitemii}{$\diamond$}'.
1678: '\renewcommand{\labelitemiii}{$\diamond$}'.
1679: '\renewcommand{\labelitemiv}{$\diamond$}';
1680: }
1681: $currentstring .= '\strut \begin{itemize}';
1682: }
1683: return $currentstring;
1684: }
1685:
1686: sub end_ul {
1687: my ($target,$token) = @_;
1688: my $currentstring = '';
1689: if ($target eq 'web' || $target eq 'webgrade') {
1690: $currentstring = $token->[2];
1691: } elsif ($target eq 'tex') {
1692: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1693: '\renewcommand{\labelitemii}{$\bullet$}'.
1694: '\renewcommand{\labelitemiii}{$\bullet$}'.
1695: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1696: }
1697: return $currentstring;
1698: }
1699:
1700: #-- <menu> tag (end tag required)
1701: sub start_menu {
1702: my ($target,$token) = @_;
1703: my $currentstring = '';
1704: if ($target eq 'web' || $target eq 'webgrade') {
1705: $currentstring = $token->[4];
1706: } elsif ($target eq 'tex') {
1707: $currentstring = " \\begin{itemize} ";
1708: }
1709: return $currentstring;
1710: }
1711:
1712: sub end_menu {
1713: my ($target,$token) = @_;
1714: my $currentstring = '';
1715: if ($target eq 'web' || $target eq 'webgrade') {
1716: $currentstring = $token->[2];
1717: } elsif ($target eq 'tex') {
1718: $currentstring = " \\end{itemize}";
1719: }
1720: return $currentstring;
1721: }
1722:
1723: #-- <dir> tag (end tag required)
1724: sub start_dir {
1725: my ($target,$token) = @_;
1726: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1727: if ($target eq 'web' || $target eq 'webgrade') {
1728: $currentstring .= $token->[4];
1729: } elsif ($target eq 'tex') {
1730: $currentstring .= " \\begin{itemize} ";
1731: }
1732: return $currentstring;
1733: }
1734:
1735: sub end_dir {
1736: my ($target,$token) = @_;
1737: my $currentstring = '';
1738: if ($target eq 'web' || $target eq 'webgrade') {
1739: $currentstring = $token->[2];
1740: } elsif ($target eq 'tex') {
1741: $currentstring = " \\end{itemize}";
1742: }
1743: return $currentstring;
1744: }
1745:
1746: #-- <ol> tag (end tag required)
1747: sub start_ol {
1748: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1749: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1750: if ($target eq 'web' || $target eq 'webgrade') {
1751: $currentstring .= $token->[4];
1752: } elsif ($target eq 'tex') {
1753: $Apache::londefdef::list_index=0;
1754: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1755: if ($type eq '1') {
1756: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1757: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1758: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1759: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1760: } elsif ($type eq 'A') {
1761: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1762: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1763: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1764: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1765: } elsif ($type eq 'a') {
1766: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1767: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1768: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1769: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1770: } elsif ($type eq 'i') {
1771: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1772: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1773: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1774: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1775: } elsif ($type eq 'I') {
1776: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1777: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1778: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1779: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1780: }
1781: $currentstring .= '\strut \begin{enumerate}';
1782: }
1783: return $currentstring;
1784: }
1785:
1786: sub end_ol {
1787: my ($target,$token) = @_;
1788: my $currentstring = '';
1789: if ($target eq 'web' || $target eq 'webgrade') {
1790: $currentstring = $token->[2];
1791: } elsif ($target eq 'tex') {
1792: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1793: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1794: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1795: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1796: }
1797: return $currentstring;
1798: }
1799:
1800: #-- <dl> tag (end tag required)
1801: sub start_dl {
1802: my ($target,$token) = @_;
1803: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1804: if ($target eq 'web' || $target eq 'webgrade') {
1805: $currentstring .= $token->[4];
1806: } elsif ($target eq 'tex') {
1807: $currentstring .= '\begin{description}';
1808: $Apache::londefdef::DL++;
1809: push(@Apache::londefdef::description,[]);
1810: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1811: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1812: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1813: }
1814: return $currentstring;
1815: }
1816:
1817: sub end_dl {
1818: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1819: my $currentstring = '';
1820: if ($target eq 'web' || $target eq 'webgrade') {
1821: $currentstring = $token->[2];
1822: } elsif ($target eq 'tex') {
1823: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1824: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1825: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1826: $currentstring.=' '.$element.' ';
1827: }
1828: pop(@Apache::londefdef::description);
1829: $currentstring.='\end{description}';
1830: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1831: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1832: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1833: $Apache::londefdef::DL--;
1834: }
1835: return $currentstring;
1836: }
1837:
1838: #-- <dt> tag (end tag optional)
1839: sub start_dt {
1840: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1841: my $currentstring='';
1842: if ($target eq 'web' || $target eq 'webgrade') {
1843: $currentstring = $token->[4];
1844: } elsif ($target eq 'tex') {
1845: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1846: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1847: &Apache::lonxml::startredirection();
1848: $Apache::londefdef::DT[-1]++;
1849: $Apache::londefdef::seenDT[-1]=1;
1850: }
1851: return $currentstring;
1852: }
1853:
1854: sub end_dt {
1855: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1856: my $currentstring = '';
1857: if ($target eq 'web' || $target eq 'webgrade') {
1858: $currentstring = $token->[2];
1859: } elsif ($target eq 'tex') {
1860: if ($Apache::londefdef::DT[-1]) {
1861: my $data=&item_cleanup();
1862: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1863: $Apache::londefdef::DT[-1]--;
1864: }
1865: }
1866: return $currentstring;
1867: }
1868:
1869: sub item_cleanup {
1870: my $item=&Apache::lonxml::endredirection();
1871: $item=~s/\\begin{center}//g;
1872: $item=~s/\\end{center}//g;
1873: return $item;
1874: }
1875:
1876: #-- <dd> tag (end tag optional)
1877: sub start_dd {
1878: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1879: my $currentstring = '';
1880: if ($target eq 'web' || $target eq 'webgrade') {
1881: $currentstring = $token->[4];
1882: } elsif ($target eq 'tex') {
1883: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1884: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1885: if (!$Apache::londefdef::seenDT[-1]) {
1886: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1887: }
1888: push(@{$Apache::londefdef::description[-1]},'');
1889: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1890: $Apache::londefdef::DD[-1]++;
1891: &Apache::lonxml::startredirection();
1892: }
1893: return $currentstring;
1894: }
1895:
1896: sub end_dd {
1897: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1898: my $currentstring = '';
1899: if ($target eq 'web' || $target eq 'webgrade') {
1900: $currentstring = $token->[2];
1901: } elsif ($target eq 'tex') {
1902: $Apache::londefdef::description[-1]->[-1].=
1903: &Apache::lonxml::endredirection().' \vskip 0mm ';
1904: $Apache::londefdef::DD[-1]--;
1905: }
1906: return $currentstring;
1907: }
1908:
1909: #-- <table> tag (end tag required)
1910: # <table> also ends any prior <p> that is not closed.
1911: # but, unless I allow <p>'s to nest, that's the
1912: # only way I could think of to allow <p> in
1913: # <tr> <th> bodies
1914: #
1915: #list of supported attributes: border,width,TeXwidth
1916: sub start_table {
1917: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1918: my $textwidth = '';
1919: my $currentstring = &end_p();
1920: if ($target eq 'web' || $target eq 'webgrade') {
1921: $currentstring .= $token->[4];
1922: } elsif ($target eq 'tex') {
1923: push(@Apache::londefdef::table, {});
1924: $Apache::londefdef::table[-1]{'row_number'} = -1;
1925: #maximum table's width (default coincides with text line length)
1926: if ($#Apache::londefdef::table==0) {
1927: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1928: $textwidth=~/(\d+\.?\d*)/;
1929: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1930: } else {
1931: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1932: #the maximum width of nested table is determined by LATeX width of parent cell
1933: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1934: } else {
1935: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1936: $textwidth=$Apache::londefdef::table[-2]{'width'};
1937: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1938: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1939: }
1940: }
1941: }
1942:
1943: # width either comes forced from the TeXwidth or the width parameters.
1944: # in either case it can be a percentage or absolute width.
1945: # in the width case we ignore absolute width
1946: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1947: if (!defined($TeXwidth)) {
1948: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1949: $safeeval,undef,1);
1950: if ($htmlwidth =~ /%/) {
1951: $TeXwidth = $htmlwidth;
1952: } else {
1953: $TeXwidth = $textwidth;
1954: }
1955: } else {
1956: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1957: }
1958: if ($TeXwidth=~/%/) {
1959: $Apache::londefdef::table[-1]{'percent'}=1;
1960: $TeXwidth=~/(\d+)/;
1961: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1962: } else {
1963: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1964: }
1965: # In the end, however the table width cannot be wider than $textwidth...
1966:
1967: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1968: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1969: }
1970:
1971: #table's border
1972: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1973: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1974: unless (defined $border) { $border = 0; }
1975: if ($border) {
1976: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1977: $Apache::londefdef::table[-1]{'vinc'} = '&';
1978: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1979: } else {
1980: $Apache::londefdef::table[-1]{'hinc'} = '';
1981: $Apache::londefdef::table[-1]{'vinc'} = '&';
1982: $Apache::londefdef::table[-1]{'vvinc'} = '';
1983: }
1984: if ($#Apache::londefdef::table==0) {
1985: # Note that \newline seems to destroy the alignment envs.
1986: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1987: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1988: }
1989: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1990: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1991: $Apache::londefdef::table[-1]{'objectlen'}=[];
1992: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1993: $Apache::londefdef::table[-1]{'maxlen'}=[];
1994: $Apache::londefdef::table[-1]{'minlen'}=[];
1995: $Apache::londefdef::table[-1]{'content'}=[];
1996: $Apache::londefdef::table[-1]{'align'}=[];
1997: if (&is_inside_of($tagstack, 'sup')) {
1998: $currentstring .= '}} \\\\ \ensuremath{^{ ';
1999: }
2000: if (&is_inside_of($tagstack, 'sub')) {
2001: $currentstring .= '}} \\\\ \ensuremath{_{ ';
2002: }
2003: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2004:
2005:
2006: }
2007: return $currentstring;
2008: }
2009:
2010: sub end_table {
2011: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2012: my $currentstring = '';
2013: if ($target eq 'web' || $target eq 'webgrade') {
2014: $currentstring = $token->[2];
2015: } elsif ($target eq 'tex') {
2016: my $inmemory = '';
2017: my $output = '';
2018: my $WARNING='';
2019: #width of columns from TeXwidth attributes
2020:
2021: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2022: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2023: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2024: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2025: }
2026: }
2027: }
2028: #free space and number of empty columns
2029: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2030: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2031: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2032: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2033: $empty_columns++;
2034: } else {
2035: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2036: }
2037: }
2038: #boundaries for contents columns
2039: my @min_len=();#columns can not be narrower
2040: my @max_len=();#maximum length of column
2041: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2042: my ($localmin,$localmax)=(0,0);
2043: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2044: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2045: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2046: }
2047: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2048: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2049: }
2050: }
2051: push @min_len, $localmin;
2052: push @max_len, $localmax;
2053: }
2054: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2055: my $localmin=0,;
2056: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2057: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2058: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2059: }
2060: }
2061: if ($max_len[$jn]<$localmin) {
2062: $max_len[$jn]=$localmin;
2063: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2064: }#object size is bigger
2065: if ($min_len[$jn]<$localmin) {
2066: $min_len[$jn]=$localmin;
2067: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2068: }#object size is bigger
2069: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2070: $min_len[$jn]=0;
2071: $max_len[$jn]=0;
2072: }
2073: }
2074: #final adjustment of column width
2075: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2076: my @adjust=();
2077: #step 1. adjustment by maximum value
2078: my $space_neeeded=0;
2079: for (my $jn=0;$jn<=$#max_len;$jn++) {
2080: $space_neeeded=$space_neeeded+$max_len[$jn];
2081: }
2082: if ($space_neeeded<=$available_space) {
2083: for (my $jn=0;$jn<=$#max_len;$jn++) {
2084: if ($fwidth[$jn]==0) {
2085: $fwidth[$jn]=$max_len[$jn];
2086: }
2087: }
2088: } else {
2089: #step 2. adjustment by minimum value (estimation)
2090: $space_neeeded=0;
2091: for (my $jn=0;$jn<=$#min_len;$jn++) {
2092: $space_neeeded+=$min_len[$jn];
2093: }
2094: if ($space_neeeded>$available_space) {
2095: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2096: for (my $jn=0;$jn<=$#max_len;$jn++) {
2097: if ($fwidth[$jn]==0) {
2098: $fwidth[$jn]=$min_len[$jn];
2099: }
2100: }
2101: #check if we have objects which can be scaled
2102: my $how_many_to_scale=0;
2103: my @to_scale=();
2104: for (my $jn=0;$jn<=$#max_len;$jn++) {
2105: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2106: $how_many_to_scale++;
2107: push @to_scale, $jn;
2108: }
2109: }
2110: if ($how_many_to_scale>0) {
2111: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2112: foreach my $jn (@to_scale) {
2113: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2114: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2115: if ($1 ne '') {
2116: my $current_length=&recalc($1);
2117: $current_length=~/(\d+\.?\d*)/;
2118: $current_length=$current_length-$space_to_adjust;
2119: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2120: }
2121: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2122: if ($1 ne '') {
2123: my $current_length=$1;
2124: $current_length=$current_length-$space_to_adjust;
2125: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2126: }
2127: }
2128: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2129: }
2130: }
2131: } else {
2132: #step 3. adjustment over minimal + corrections
2133: my $enlarge_coef=$available_space/$space_neeeded;
2134: my $acsessive=0;
2135: for (my $jn=0;$jn<=$#min_len;$jn++) {
2136: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2137: if ($adjust[$jn]>$max_len[$jn]) {
2138: $fwidth[$jn]=$max_len[$jn];
2139: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2140: $adjust[$jn]=0;
2141: }
2142: }
2143: if ($acsessive>0) {
2144: #we have an excess of space and can redistribute it
2145: my $notempty_columns=0;
2146: for (my $jn=0;$jn<=$#min_len;$jn++) {
2147: if ($adjust[$jn]!=0) {
2148: $notempty_columns++;
2149: }
2150: }
2151: my $per_column=$acsessive/$notempty_columns;
2152: for (my $jn=0;$jn<=$#min_len;$jn++) {
2153: if ($adjust[$jn]!=0) {
2154: $adjust[$jn]+=$per_column;
2155: $fwidth[$jn]=$adjust[$jn];
2156: }
2157: }
2158: } else {
2159: for (my $jn=0;$jn<=$#min_len;$jn++) {
2160: $fwidth[$jn]=$adjust[$jn];
2161: }
2162: }
2163: }
2164: }
2165: #use all available width if it is defined in % or as TeXwidth
2166: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2167: my $current=0;
2168: for (my $i=0;$i<=$#fwidth;$i++) {
2169: $current+=$fwidth[$i];
2170: }
2171: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2172: for (my $i=0;$i<=$#fwidth;$i++) {
2173: $fwidth[$i]*=$coef;
2174: }
2175: }
2176: #removing of empty columns if allowed
2177: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2178: if ($permission eq 'yes') {
2179: my @cleaned_table=();
2180: my @cleaned_header=();
2181: my $colind=0;
2182: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2183: if ($fwidth[$jn]!=0) {
2184: #we need to copy column
2185: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2186: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2187: $cleaned_header[$colind]=$fwidth[$jn];
2188: }
2189: $colind++;
2190: }
2191: }
2192: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2193: @fwidth=@cleaned_header;
2194: }
2195: #construct header of the table
2196: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2197: for (my $in=0;$in<=$#fwidth;$in++) {
2198: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2199: }
2200: $header_of_table .= '}';
2201: #fill the table
2202: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2203: my $have_rowspan = 0;
2204: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2205:
2206: #-----------------------------------------------------------
2207: # I think this order of doing things will ensure that
2208: # single rowspan, columspan and combined row/colspans will
2209: # work correctly. LaTeX is delicate here.
2210: # RF.
2211:
2212: # Start a rowspan if necessary:
2213:
2214: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2215: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2216: #
2217: # Do the appropriate magic if this has a colspan
2218: #
2219:
2220: if ($colspan > 1) {
2221: my $spanwidth = 0;
2222: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2223: $spanwidth += $fwidth[$spancol];
2224: }
2225: $output .= '\multicolumn{'.
2226: $colspan
2227: ."}";
2228: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2229: $output .= '{|c|}{';
2230: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2231: $output .= '{|r|}{';
2232: }
2233: else {
2234: $output .= "{|p{$spanwidth mm}|}{";
2235: }
2236:
2237: }
2238:
2239: # Rowspan... if colspan is 1, and there's an alignment we'll need
2240: # to kick in a multicolumn in order to get the alignment spec.
2241: # this must precede the multirow or LaTex gets quite upset.
2242: # Naturally if colspan > 1 we've already done that above ^
2243: #
2244: my $multirow_aligned = 0;
2245: if ($rowspan > 1) {
2246: if ($colspan == 1) {
2247: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2248: $output .= '\multicolumn{1}{|c|}{';
2249: $multirow_aligned = 1;
2250: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2251: $output .= '\multicolumn{1}{|r|}{';
2252: $multirow_aligned = 1;
2253: }
2254: }
2255: $have_rowspan++;
2256: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2257:
2258: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2259: s{^\s*\\par\s*}{};
2260: $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
2261: s{\s*\\vskip\s*0pt\s*$}{};
2262:
2263: #
2264: # If we did not throw in a multicolumn to align, then add
2265: # an extra {
2266: # so we close correctly without having to keep additional state
2267: # around
2268: #
2269: if (!$multirow_aligned) {
2270: $output .= '{';
2271: }
2272: }
2273: if (($rowspan eq '^') || ($rowspan eq '_')) {
2274: $have_rowspan++;
2275: }
2276: #--------------------------------------------------------------
2277:
2278:
2279: # For right and center alignment of single cells.
2280: # we are going to use a multicolumn with a span of 1 to specify alignment.
2281: #
2282: if ($colspan == 1 && $rowspan == 1) {
2283: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2284: $output .= '\multicolumn{1}{|c|}{';
2285: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2286: $output .= '\multicolumn{1}{|r|}{';
2287: }
2288: }
2289:
2290: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2291:
2292: if (($colspan == 1 && $rowspan == 1) &&
2293: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2294: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2295: $output .= '}';
2296: }
2297:
2298: # Close off any open multirow:
2299:
2300: if ($rowspan > 1) {
2301: $output .= '}}';
2302: }
2303: # Close off the colspan...
2304: #
2305: if ($colspan > 1) {
2306: $output .= '}';
2307: $jn += $colspan-1; # Adjust for number of rows really left.
2308: }
2309: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2310: }
2311: # If have_rowspan > 0, and borders are on, then
2312: # we need to do more than put an \hline at the bottom of row.
2313: # we need to do the appropriate \cline to ensure that
2314: # the spanned rows don't have \hlines through them.
2315:
2316: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2317: $output .= ' \\\\ ';
2318: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2319: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2320: if ($rowspan ne "^") {
2321: if (($rowspan <= 1) || ($rowspan eq '_')) {
2322: my $column = $jn+1;
2323: $output .= '\cline{'.$column.'-'.$column.'} ';
2324: }
2325: }
2326: }
2327:
2328: } else {
2329: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2330: }
2331: }
2332: # Note that \newline destroys alignment env's produced by e.g. <div>
2333: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2334: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2335: if ($#Apache::londefdef::table > 0) {
2336: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2337: # Figure out max/and min width by summing us and then
2338: # apply that to the current column of the table we nest in
2339: # if it's larger than the current width or the current width
2340: # is undefined.
2341: #
2342: my $min_nested_width = 0;
2343: my $max_nested_width = 0;
2344: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2345: $min_nested_width += $min_len[$col];
2346: $max_nested_width += $max_len[$col];
2347:
2348: }
2349: # Fudge in an extra 5 mm for borders etc:
2350:
2351: $min_nested_width += 5;
2352: $max_nested_width += 5;
2353:
2354: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2355: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2356: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2357: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2358: }
2359: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2360: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2361: }
2362:
2363: pop @Apache::londefdef::table;
2364: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2365: } else {
2366: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2367: pop @Apache::londefdef::table;
2368: undef @Apache::londefdef::table;
2369: }
2370: }
2371: return $currentstring;
2372: }
2373:
2374: #-- <tr> tag (end tag optional)
2375: sub start_tr {
2376: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2377: my $currentstring = '';
2378: if ($target eq 'web' || $target eq 'webgrade') {
2379: $currentstring = $token->[4];
2380: } elsif ($target eq 'tex') {
2381: $Apache::londefdef::table[-1]{'row_number'}++;
2382: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2383: if ($alignchar ne '') {
2384: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2385: } else {
2386: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2387: }
2388: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2389: #
2390: # Need to save the number of table columns to preserve the max # columns.
2391: #
2392: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2393: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2394: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2395: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2396: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2397: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2398: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2399: }
2400: return $currentstring;
2401: }
2402:
2403: sub end_tr {
2404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2405: my $currentstring = &end_p(); # Close any pending <p> in the row.
2406: if ($target eq 'web' || $target eq 'webgrade') {
2407: $currentstring .= $token->[2];
2408: } elsif ($target eq 'tex') {
2409: if ($Apache::londefdef::TD_redirection) {
2410: &end_td_tex($parstack,$parser,$safeeval);
2411: }
2412: # Counter columns must be the maximum number of columns seen
2413: # in the table so far so:
2414: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2415: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2416: }
2417:
2418:
2419:
2420: }
2421: return $currentstring;
2422: }
2423:
2424: #-- <td> tag (end tag optional)
2425: sub start_td {
2426: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2427: my $currentstring = '';
2428: if ($target eq 'web' || $target eq 'webgrade') {
2429: $currentstring = $token->[4];
2430: } elsif ($target eq 'tex') {
2431: $Apache::londefdef::TD_redirection = 1;
2432: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2433: }
2434: return $currentstring;
2435: }
2436:
2437: sub tag_check {
2438: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2439: my @ar=@$parstack;
2440: for (my $i=$#ar-1;$i>=0;$i--) {
2441: if (lc($$tagstack[$i]) eq $good_tag) {
2442: &start_td_tex($parstack,$parser,$safeeval);
2443: last;
2444: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2445: splice @ar, $i+1;
2446: &end_td_tex(\@ar,$parser,$safeeval);
2447: &start_td_tex($parstack,$parser,$safeeval);
2448: last;
2449: }
2450: }
2451: return '';
2452: }
2453:
2454: sub start_td_tex {
2455: my ($parstack,$parser,$safeeval) = @_;
2456: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2457: if ($alignchar eq '') {
2458: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2459: }
2460: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2461: $Apache::londefdef::table[-1]{'counter_columns'}++;
2462: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2463: if (defined $TeXwidth) {
2464: my $current_length=&recalc($TeXwidth);
2465: $current_length=~/(\d+\.?\d*)/;
2466: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2467: }
2468: &Apache::lonxml::startredirection();
2469: return '';
2470: }
2471:
2472: sub end_td_tex {
2473: my ($parstack,$parser,$safeeval) = @_;
2474: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2475: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2476: my $data = &Apache::lonxml::endredirection();
2477:
2478: # The rowspan array of the table indicates which cells are part of a span.
2479: # n indicates the start of a span set of n rows.
2480: # ^ indicates a cell that continues a span set.
2481: # _ indicates the cell is at the bottom of a span set.
2482: # If this and subsequent cells are part of a rowspan, we must
2483: # push along the row until we find one that is not.
2484:
2485: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2486: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2487: # Part of a span.
2488: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2489: $current_column++;
2490: }
2491: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2492:
2493:
2494: # Get the column and row spans.
2495: # Colspan can be done via \multicolumn if I can figure out the data structs.
2496:
2497: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2498: if (!$colspan) {
2499: $colspan = 1;
2500: }
2501:
2502: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2503: if (!$rowspan) {
2504: $rowspan = 1;
2505: }
2506:
2507:
2508:
2509: for (my $c = 0; $c < $colspan; $c++) {
2510: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2511: for (my $i = 1; $i < $rowspan; $i++) {
2512: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2513: if ($i == ($rowspan-1)) {
2514: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2515: }
2516: }
2517: }
2518:
2519: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2520: if (defined $TeXwidth) {
2521: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2522: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2523: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2524: } else {
2525: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2526: my $garbage_data=$data;
2527: my $fwidth=0;
2528: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2529: my $current_length=&recalc($1);
2530: $current_length=~/(\d+\.?\d*)/;
2531: if ($fwidth<$1) {$fwidth=$1;}
2532: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2533: }
2534: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2535: my $current_length=$1;
2536: if ($fwidth<$current_length) {$fwidth=$current_length;}
2537: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2538: }
2539: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2540: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2541: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2542: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2543: } elsif ($data=~/\\parbox\{\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*\s*\}/ or $data=~/\\epsfxsize\s*=\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*/) {
2544: my $garbage_data=$data;
2545: my $fwidth=0;
2546: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2547: my $current_length=&recalc($1);
2548: $current_length=~/(\d+\.?\d*)/;
2549: if ($fwidth<$1) {$fwidth=$1;}
2550: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2551: }
2552: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2553: my $current_length=&recalc($1);
2554: $current_length=~/(\d+\.?\d*)/;
2555: if ($fwidth<$1) {$fwidth=$1;}
2556: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2557: }
2558: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2559: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2560: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2561: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2562: $data=~s/\\\\\s*$//;
2563: } else {
2564: $data=~s/^\s+(\S.*)/$1/;
2565: $data=~s/(.*\S)\s+$/$1/;
2566: $data=~s/(\s)+/$1/;
2567: my ($current_length,$min_length)=(0,0);
2568: if ($data=~/\\vskip/) {
2569: my $newdata=$data;
2570: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2571: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2572: foreach my $elementdata (@newdata) {
2573: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2574: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2575: my @words=split(/ /,$elementdata);
2576: foreach my $word (@words) {
2577: my $lengthword=2.5*&LATEX_length($word);
2578: if ($min_length<$lengthword) {$min_length=$lengthword;}
2579: }
2580: }
2581: } else {
2582: $current_length=2.5*&LATEX_length($data);
2583: my @words=split(/ /,$data);
2584: foreach my $word (@words) {
2585: my $lengthword=2*&LATEX_length($word);
2586: if ($min_length<$lengthword) {$min_length=$lengthword;}
2587: }
2588: }
2589: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2590: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2591: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2592: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2593: }
2594: }
2595: # Substitute all of the tables nested in this cell in their appropriate places.
2596:
2597:
2598: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2599: for (my $in=0; $in<=$nested_count; $in++) {
2600: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2601: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2602: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2603: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2604:
2605: }
2606: # Should be be killing off the 'include' elements as they're used up?
2607:
2608: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2609:
2610:
2611:
2612:
2613: # the colspan array will indicate how many columns will be spanned by this
2614: # cell..this requires that counter_columns also be adjusted accordingly
2615: # so that the next bunch of text goes in the right cell. Note that since
2616: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2617: #
2618:
2619: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2620: for (my $i = 0; $i < ($colspan -1); $i++) {
2621: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2622: }
2623: for (my $r = 0; $r < $rowspan; $r++) {
2624: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2625: # Put empty text in spanned cols.
2626:
2627: }
2628:
2629:
2630:
2631: return '';
2632: }
2633:
2634: sub end_td {
2635: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2636: my $currentstring = '';
2637: if ($target eq 'web' || $target eq 'webgrade') {
2638: $currentstring = $token->[2];
2639: } elsif ($target eq 'tex') {
2640: $Apache::londefdef::TD_redirection =0;
2641: &end_td_tex($parstack,$parser,$safeeval);
2642: }
2643: return $currentstring;
2644: }
2645:
2646: #-- <th> tag (end tag optional)
2647: sub start_th {
2648: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2649: my $currentstring = '';
2650: if ($target eq 'web' || $target eq 'webgrade') {
2651: $currentstring = $token->[4];
2652: } elsif ($target eq 'tex') {
2653: $Apache::londefdef::TD_redirection = 1;
2654: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2655: }
2656: return $currentstring;
2657: }
2658:
2659: sub tagg_check {
2660: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2661: my @ar=@$parstack;
2662: for (my $i=$#ar-1;$i>=0;$i--) {
2663: if (lc($$tagstack[$i]) eq $good_tag) {
2664: &start_th_tex($parstack,$parser,$safeeval);
2665: last;
2666: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2667: splice @ar, $i+1;
2668: &end_th_tex(\@ar,$parser,$safeeval);
2669: &start_th_tex($parstack,$parser,$safeeval);
2670: last;
2671: }
2672: }
2673: return '';
2674: }
2675:
2676: sub start_th_tex {
2677: my ($parstack,$parser,$safeeval) = @_;
2678: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2679: if ($alignchar eq '') {
2680: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2681: }
2682: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2683: $Apache::londefdef::table[-1]{'counter_columns'}++;
2684: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2685: if (defined $TeXwidth) {
2686: my $current_length=&recalc($TeXwidth);
2687: $current_length=~/(\d+\.?\d*)/;
2688: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2689: }
2690: &Apache::lonxml::startredirection();
2691: return '';
2692: }
2693:
2694: sub end_th_tex {
2695: my ($parstack,$parser,$safeeval) = @_;
2696: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2697: my $data=&Apache::lonxml::endredirection();
2698: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2699: if (defined $TeXwidth) {
2700: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2701: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2702: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2703: } else {
2704: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2705: my $garbage_data=$data;
2706: my $fwidth=0;
2707: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2708: my $current_length=&recalc($1);
2709: $current_length=~/(\d+\.?\d*)/;
2710: if ($fwidth<$1) {$fwidth=$1;}
2711: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2712: }
2713: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2714: my $current_length=$1;
2715: if ($fwidth<$current_length) {$fwidth=$current_length;}
2716: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2717: }
2718: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2719: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2720: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2721: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2722: } else {
2723: $data=~s/^\s+(\S.*)/$1/;
2724: $data=~s/(.*\S)\s+$/$1/;
2725: $data=~s/(\s)+/$1/;
2726: my ($current_length,$min_length)=(0,0);
2727: if ($data=~/\\vskip/) {
2728: my $newdata=$data;
2729: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2730: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2731: foreach my $elementdata (@newdata) {
2732: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2733: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2734: my @words=split(/ /,$elementdata);
2735: foreach my $word (@words) {
2736: my $lengthword=2.5*&LATEX_length($word);
2737: if ($min_length<$lengthword) {$min_length=$lengthword;}
2738: }
2739: }
2740: } else {
2741: $current_length=2.5*&LATEX_length($data);
2742: my @words=split(/ /,$data);
2743: foreach my $word (@words) {
2744: my $lengthword=2*&LATEX_length($word);
2745: if ($min_length<$lengthword) {$min_length=$lengthword;}
2746: }
2747: }
2748: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2749: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2750: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2751: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2752: }
2753: }
2754: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2755: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2756: }
2757: #make data bold
2758: $data='\textbf{'.$data.'}';
2759: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2760: return'';
2761: }
2762:
2763: sub end_th {
2764: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2765: my $currentstring = &end_p(); # Close any open <p> in the row.
2766: if ($target eq 'web' || $target eq 'webgrade') {
2767: $currentstring .= $token->[2];
2768: } elsif ($target eq 'tex') {
2769: $Apache::londefdef::TD_redirection =0;
2770: &end_th_tex($parstack,$parser,$safeeval);
2771: }
2772: return $currentstring;
2773: }
2774:
2775: #-- <img> tag (end tag forbidden)
2776: #
2777: # Render the <IMG> tag.
2778: # <IMG> has the following attributes (in addition to the
2779: # standard HTML ones:
2780: # TeXwrap - Governs how the tex target will try to wrap text around
2781: # horizontally aligned images.
2782: # TeXwidth - The width of the image when rendered for print (mm).
2783: # TeXheight - The height of the image when rendered for print (mm)
2784: # (Note there seems to also be support for this as a % of page size)
2785: #
2786: sub start_img {
2787: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2788: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2789: undef,1);
2790: if (! $src &&
2791: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2792: ) {
2793: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2794: return '';
2795: }
2796: &Apache::lonxml::extlink($src);
2797: my $currentstring = '';
2798: my $scaling = .3;
2799:
2800: # Render unto browsers that which are the browser's...
2801:
2802: if ($target eq 'web' || $target eq 'webgrade') {
2803: if ($env{'browser.imagesuppress'} ne 'on') {
2804: my $enc = ('yes' eq
2805: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2806: $safeeval)));
2807: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2808: $enc);
2809: } else {
2810: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2811: undef,1);
2812: if (!$alttag) {
2813: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2814: $src);
2815: }
2816: $currentstring.='[IMAGE: '.$alttag.']';
2817: }
2818:
2819: # and render unto TeX that which is LaTeX
2820:
2821: } elsif ($target eq 'tex') {
2822: #
2823: # The alignment will require some superstructure to be put around
2824: # the \includegraphics stuff. At present we can only partially
2825: # simulate the alignments offered by html.
2826: #
2827: #
2828: my $align = lc(&Apache::lonxml::get_param('align',
2829: $parstack,
2830: $safeeval,
2831: undef,1));
2832: if(!$align) {
2833: $align = "bottom"; # This is html's default so it's ours too.
2834: }
2835: #
2836: &Apache::lonxml::debug("Alignemnt = $align");
2837: # LaTeX's image/text wrapping is really bad since it wants to
2838: # make figures float.
2839: # The user has the optional parameter (applicable only to l/r
2840: # alignment to use the picins/parpic directive to get wrapped text
2841: # this is also imperfect.. that's why we give them a choice...
2842: # so they can't yell at us for our choice.
2843: #
2844: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2845: $parstack,
2846: $safeeval,
2847: undef,0);
2848: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2849: if(!$latex_rendering) {
2850: $latex_rendering = "texwrap";
2851: }
2852: # using texwrap inside a table does not work. So, if after all of this,
2853: # texwrap is on, we turn it off if we detect we're in a table:
2854: #
2855: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2856: $latex_rendering = 'parpic';
2857: }
2858:
2859: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2860:
2861: #if original gif/jpg/png file exist do following:
2862: my $origsrc=$src;
2863: my ($path,$file) = &get_eps_image($src);
2864: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2865: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2866: &Apache::lonxml::debug("path = $path file = $file src = $src");
2867: if (-e $src) {
2868: &Apache::lonxml::debug("$src exists");
2869: my ($height_param,$width_param)=
2870: &image_size($origsrc,0.3,$parstack,$safeeval);
2871: my $size;
2872: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2873: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2874: # Default size if not able to extract that (e.g. eps image).
2875:
2876: # &Apache::lonnet::logthis("Size = $size");
2877:
2878: $size='['.$size;
2879: $size=~s/,$/]/;
2880: $currentstring .= '\graphicspath{{'.$path.'}}'
2881: .'\includegraphics'.$size.'{'.$file.'} ';
2882: $currentstring = &align_latex_image($align, $latex_rendering,
2883: $currentstring,
2884: $width_param, $height_param);
2885:
2886: } else {
2887: &Apache::lonxml::debug("$src does not exist");
2888: #original image file doesn't exist so check the alt attribute
2889: my $alt =
2890: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2891: unless ($alt) {
2892: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2893: }
2894:
2895: if ($alt) { $currentstring .= ' '.$alt.' '; }
2896: }
2897:
2898: # And here's where the semi-quote breaks down: allow the user
2899: # to edit the beast as well by rendering the problem for edit:
2900: } elsif ($target eq 'edit') {
2901: $currentstring .=&Apache::edit::tag_start($target,$token);
2902: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2903: &Apache::edit::browse('src',undef,'alt').' '.
2904: &Apache::edit::search('src',undef,'alt').'<br />';
2905: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2906: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2907: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2908: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2909: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2910: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2911: ['','bottom','middle','top','left','right'],$token,5);
2912: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2913: ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
2914: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2915: ['no','yes'], $token, 2);
2916: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2917: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2918: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2919: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2920: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2921:
2922:
2923: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2924: if ($width) { $currentstring.=' width="'.$width.'" '; }
2925: if ($height) { $currentstring.=' height="'.$height.'" '; }
2926: $currentstring .= ' />';
2927: } elsif ($target eq 'modified') {
2928: my ($osrc,$owidth,$oheight)=
2929: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2930: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2931: $safeeval,'src','alt','align',
2932: 'TeXwidth','TeXheight', 'TeXwrap',
2933: 'width','height','encrypturl');
2934: my ($nsrc,$nwidth,$nheight)=
2935: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2936: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2937: &image_replication($loc);
2938: my ($iwidth,$iheight);
2939: if (-e $loc) {
2940: my $image = Image::Magick->new;
2941: $image->Read($loc);
2942: ($iwidth, $iheight) = ($image->Get('width'),
2943: $image->Get('height'));
2944: }
2945: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2946: # changed image or no size specified,
2947: # if they didn't explicitly change the
2948: # width or height use the ones from the image
2949: if ($iwidth && $iheight) {
2950: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2951: $token->[2]{'width'} = $iwidth;$ctag=1;
2952: }
2953: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2954: $token->[2]{'height'}=$iheight;$ctag=1;
2955: }
2956: }
2957: }
2958: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2959: # if we don't have a width or height
2960: if ($iwidth && $cwidth && !$cheight) {
2961: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2962: }
2963: if ($iheight && $cheight && !$cwidth) {
2964: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2965: }
2966: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2967: }
2968:
2969: return $currentstring;
2970: }
2971:
2972: sub end_img {
2973: my ($target,$token) = @_;
2974: my $currentstring = '';
2975: if ($target eq 'web' || $target eq 'webgrade') {
2976: $currentstring = $token->[2];
2977: } elsif ($target eq 'tex') {
2978: $currentstring = '';
2979: }
2980: return $currentstring;
2981: }
2982:
2983: #-- <applet> tag (end tag required)
2984: sub start_applet {
2985: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2986:
2987: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
2988: &Apache::lonxml::extlink($code);
2989: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
2990: undef,1);
2991: &Apache::lonxml::extlink($archive);
2992: my $currentstring = '';
2993: if ($target eq 'web' || $target eq 'webgrade') {
2994: if ($env{'browser.appletsuppress'} ne 'on') {
2995: $currentstring = &Apache::lonenc::encrypt_ref($token,
2996: {'code'=>$code,
2997: 'archive'=>$archive}
2998: );
2999: } else {
3000: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3001: $safeeval,undef,1);
3002: unless ($alttag) {
3003: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3004: $code);
3005: }
3006: $currentstring='[APPLET: '.$alttag.']';
3007: }
3008: } elsif ($target eq 'tex') {
3009: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3010: $safeeval,undef,1);
3011: unless ($alttag) {
3012: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3013: undef,1);
3014: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3015: $code);
3016: }
3017: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3018: '.}\end{center}';
3019: }
3020: return $currentstring;
3021: }
3022:
3023: sub end_applet {
3024: my ($target,$token) = @_;
3025: my $currentstring = '';
3026: if ($target eq 'web' || $target eq 'webgrade') {
3027: $currentstring = $token->[2];
3028: } elsif ($target eq 'tex') {
3029: }
3030: return $currentstring;
3031: }
3032:
3033: #-- <embed> tag (end tag optional/required)
3034: sub start_embed {
3035: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3036: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3037: &Apache::lonxml::extlink($src);
3038: my $currentstring = '';
3039: if ($target eq 'web' || $target eq 'webgrade') {
3040: if ($env{'browser.embedsuppress'} ne 'on') {
3041: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3042: } else {
3043: my $alttag=&Apache::lonxml::get_param
3044: ('alt',$parstack,$safeeval,undef,1);
3045: unless ($alttag) {
3046: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3047: }
3048: $currentstring='[EMBED: '.$alttag.']';
3049: }
3050: } elsif ($target eq 'tex') {
3051: }
3052: return $currentstring;
3053: }
3054:
3055: sub end_embed {
3056: my ($target,$token) = @_;
3057: my $currentstring = '';
3058: if ($target eq 'web' || $target eq 'webgrade') {
3059: $currentstring = $token->[2];
3060: } elsif ($target eq 'tex') {
3061: }
3062: return $currentstring;
3063: }
3064:
3065: #-- <param> tag (end tag forbidden)
3066: sub start_param {
3067: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3068: if (&Apache::lonxml::get_param('name',$parstack,
3069: $safeeval,undef,1)=~/^cabbase$/i) {
3070: my $value=&Apache::lonxml::get_param('value',$parstack,
3071: $safeeval,undef,1);
3072: &Apache::lonxml::extlink($value);
3073: }
3074:
3075: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3076: &Apache::lonxml::extlink($src);
3077: my $currentstring = '';
3078: if ($target eq 'web' || $target eq 'webgrade') {
3079: my %toconvert;
3080: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3081: if ($src) { $toconvert{'src'}= $src; }
3082: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3083: undef,1);
3084: if ($name=~/^cabbase$/i) {
3085: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3086: $safeeval,undef,1);
3087: }
3088: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3089: } elsif ($target eq 'tex') {
3090: }
3091: return $currentstring;
3092: }
3093:
3094: sub end_param {
3095: my ($target,$token) = @_;
3096: my $currentstring = '';
3097: if ($target eq 'web' || $target eq 'webgrade') {
3098: $currentstring = $token->[2];
3099: } elsif ($target eq 'tex') {
3100: }
3101: return $currentstring;
3102: }
3103:
3104: #-- <allow> tag
3105: sub start_allow {
3106: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3107: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3108: &Apache::lonxml::extlink($src);
3109:
3110: if ($target eq 'tex') { &image_replication($src); }
3111: my $result;
3112: if ($target eq 'edit') {
3113: $result .=&Apache::edit::tag_start($target,$token);
3114: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3115: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3116: } elsif ($target eq 'modified') {
3117: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3118: $safeeval,'src');
3119: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3120: }
3121: return $result;
3122: }
3123:
3124: sub end_allow {
3125: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3126: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3127: return '';
3128: }
3129:
3130: #-- Frames (end tag required)
3131: #-- <frameset>
3132: sub start_frameset {
3133: my ($target,$token) = @_;
3134: my $currentstring = ''; # Close any pending para.
3135: if ($target eq 'web' || $target eq 'webgrade') {
3136: $currentstring =
3137: &Apache::loncommon::start_page($Apache::londefdef::title,
3138: $Apache::londefdef::head,
3139: {'add_entries' => $token->[2],
3140: 'no_title' => 1,
3141: 'force_register' => 1,
3142: 'frameset' => 1,});
3143:
3144: }
3145: return $currentstring;
3146: }
3147:
3148: sub end_frameset {
3149: my ($target,$token) = @_;
3150: my $currentstring = '';
3151: if ($target eq 'web' || $target eq 'webgrade') {
3152: $currentstring = $token->[2];
3153: }
3154: return $currentstring;
3155: }
3156:
3157: #-- <xmp> (end tag required)
3158: sub start_xmp {
3159: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3160: my $currentstring = '';
3161: if ($target eq 'web' || $target eq 'webgrade') {
3162: $currentstring .= $token->[4];
3163: } elsif ($target eq 'tex') {
3164: $currentstring .= '\begin{verbatim}';
3165: }
3166: return $currentstring;
3167: }
3168:
3169: sub end_xmp {
3170: my ($target,$token) = @_;
3171: my $currentstring = '';
3172: if ($target eq 'web' || $target eq 'webgrade') {
3173: $currentstring .= $token->[2];
3174: } elsif ($target eq 'tex') {
3175: $currentstring .= '\end{verbatim}';
3176: }
3177: return $currentstring;
3178: }
3179:
3180: #-- <pre> (end tag required)
3181: sub start_pre {
3182: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3183: my $currentstring = &end_p(); # close off pending <p>
3184: if ($target eq 'web' || $target eq 'webgrade') {
3185: $currentstring .= $token->[4];
3186: } elsif ($target eq 'tex') {
3187: $currentstring .= '\begin{verbatim}';
3188: &Apache::lonxml::disable_LaTeX_substitutions();
3189: }
3190: return $currentstring;
3191: }
3192:
3193: sub end_pre {
3194: my ($target,$token) = @_;
3195: my $currentstring = '';
3196: if ($target eq 'web' || $target eq 'webgrade') {
3197: $currentstring .= $token->[2];
3198: } elsif ($target eq 'tex') {
3199: $currentstring .= '\end{verbatim}';
3200: &Apache::lonxml::enable_LaTeX_substitutions();
3201: }
3202: return $currentstring;
3203: }
3204:
3205: #-- <insert>
3206: sub start_insert {
3207: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3208: my $currentstring = '';
3209: if ($target eq 'web' || $target eq 'webgrade') {
3210: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3211: $currentstring .= '<b>'.$display.'</b>';;
3212: }
3213: return $currentstring;
3214: }
3215:
3216: sub end_insert {
3217: my ($target,$token) = @_;
3218: my $currentstring = '';
3219: if ($target eq 'web' || $target eq 'webgrade') {
3220: $currentstring .= '';
3221: }
3222: return $currentstring;
3223: }
3224:
3225: #-- <externallink>
3226: sub start_externallink {
3227: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3228: my $currentstring = '';
3229: if ($target eq 'web' || $target eq 'webgrade') {
3230: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3231: $currentstring .= '<b>'.$display.'</b>';;
3232: }
3233: return $currentstring;
3234: }
3235:
3236: sub end_externallink {
3237: my ($target,$token) = @_;
3238: my $currentstring = '';
3239: if ($target eq 'web' || $target eq 'webgrade') {
3240: $currentstring .= '';
3241: }
3242: return $currentstring;
3243: }
3244:
3245: #-- <blankspace heigth="">
3246: sub start_blankspace {
3247: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3248: my $currentstring = &end_p(); # closes off any unclosed <p>
3249: if ($target eq 'tex') {
3250: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3251: $currentstring .= '\vskip '.$howmuch.' ';
3252: }
3253: return $currentstring;
3254: }
3255:
3256: sub end_blankspace {
3257: my ($target,$token) = @_;
3258: my $currentstring = '';
3259: if ($target eq 'tex') {
3260: $currentstring .= '';
3261: }
3262: return $currentstring;
3263: }
3264:
3265: #-- <abbr> tag (end tag required)
3266: sub start_abbr {
3267: my ($target,$token) = @_;
3268: my $currentstring = '';
3269: if ($target eq 'web' || $target eq 'webgrade') {
3270: $currentstring = $token->[4];
3271: }
3272: return $currentstring;
3273: }
3274:
3275: sub end_abbr {
3276: my ($target,$token) = @_;
3277: my $currentstring = '';
3278: if ($target eq 'web' || $target eq 'webgrade') {
3279: $currentstring = $token->[2];
3280: }
3281: return $currentstring;
3282: }
3283:
3284: #-- <acronym> tag (end tag required)
3285: sub start_acronym {
3286: my ($target,$token) = @_;
3287: my $currentstring = '';
3288: if ($target eq 'web' || $target eq 'webgrade') {
3289: $currentstring = $token->[4];
3290: }
3291: return $currentstring;
3292: }
3293:
3294: sub end_acronym {
3295: my ($target,$token) = @_;
3296: my $currentstring = '';
3297: if ($target eq 'web' || $target eq 'webgrade') {
3298: $currentstring = $token->[2];
3299: }
3300: return $currentstring;
3301: }
3302:
3303: #-- <area> tag (end tag forbidden)
3304: sub start_area {
3305: my ($target,$token) = @_;
3306: my $currentstring = '';
3307: if ($target eq 'web' || $target eq 'webgrade') {
3308: $currentstring = $token->[4];
3309: }
3310: return $currentstring;
3311: }
3312:
3313: sub end_area {
3314: my ($target,$token) = @_;
3315: my $currentstring = '';
3316: if ($target eq 'web' || $target eq 'webgrade') {
3317: $currentstring = $token->[2];
3318: }
3319: return $currentstring;
3320: }
3321:
3322: #-- <base> tag (end tag forbidden)
3323: sub start_base {
3324: my ($target,$token) = @_;
3325: my $currentstring = '';
3326: if ($target eq 'web' || $target eq 'webgrade') {
3327: $currentstring = $token->[4];
3328: }
3329: return $currentstring;
3330: }
3331:
3332: sub end_base {
3333: my ($target,$token) = @_;
3334: my $currentstring = '';
3335: if ($target eq 'web' || $target eq 'webgrade') {
3336: $currentstring = $token->[2];
3337: }
3338: return $currentstring;
3339: }
3340:
3341: #-- <bdo> tag (end tag required)
3342: sub start_bdo {
3343: my ($target,$token) = @_;
3344: my $currentstring = '';
3345: if ($target eq 'web' || $target eq 'webgrade') {
3346: $currentstring = $token->[4];
3347: }
3348: return $currentstring;
3349: }
3350:
3351: sub end_bdo {
3352: my ($target,$token) = @_;
3353: my $currentstring = '';
3354: if ($target eq 'web' || $target eq 'webgrade') {
3355: $currentstring = $token->[2];
3356: }
3357: return $currentstring;
3358: }
3359:
3360: #-- <bgsound> tag (end tag optional)
3361: sub start_bgsound {
3362: my ($target,$token) = @_;
3363: my $currentstring = '';
3364: if ($target eq 'web' || $target eq 'webgrade') {
3365: $currentstring = $token->[4];
3366: }
3367: return $currentstring;
3368: }
3369:
3370: sub end_bgsound {
3371: my ($target,$token) = @_;
3372: my $currentstring = '';
3373: if ($target eq 'web' || $target eq 'webgrade') {
3374: $currentstring = $token->[2];
3375: }
3376: return $currentstring;
3377: }
3378:
3379: #-- <blink> tag (end tag required)
3380: sub start_blink {
3381: my ($target,$token) = @_;
3382: my $currentstring = '';
3383: if ($target eq 'web' || $target eq 'webgrade') {
3384: $currentstring = $token->[4];
3385: }
3386: return $currentstring;
3387: }
3388:
3389: sub end_blink {
3390: my ($target,$token) = @_;
3391: my $currentstring = '';
3392: if ($target eq 'web' || $target eq 'webgrade') {
3393: $currentstring = $token->[2];
3394: }
3395: return $currentstring;
3396: }
3397:
3398: #-- <blockquote> tag (end tag required)
3399: sub start_blockquote {
3400: my ($target,$token) = @_;
3401: my $currentstring = &end_p(); # Close any unclosed <p>
3402: if ($target eq 'web' || $target eq 'webgrade') {
3403: $currentstring .= $token->[4];
3404: }
3405: if ($target eq 'tex') {
3406: $currentstring .= '\begin{quote}';
3407: }
3408: return $currentstring;
3409: }
3410:
3411: sub end_blockquote {
3412: my ($target,$token) = @_;
3413: my $currentstring = '';
3414: if ($target eq 'web' || $target eq 'webgrade') {
3415: $currentstring = $token->[2];
3416: }
3417: if ($target eq 'tex') {
3418: $currentstring = '\end{quote}';
3419: }
3420: return $currentstring;
3421: }
3422:
3423: #-- <button> tag (end tag required)
3424: sub start_button {
3425: my ($target,$token) = @_;
3426: my $currentstring = '';
3427: if ($target eq 'web' || $target eq 'webgrade') {
3428: $currentstring = $token->[4];
3429: }
3430: return $currentstring;
3431: }
3432:
3433: sub end_button {
3434: my ($target,$token) = @_;
3435: my $currentstring = '';
3436: if ($target eq 'web' || $target eq 'webgrade') {
3437: $currentstring = $token->[2];
3438: }
3439: return $currentstring;
3440: }
3441:
3442: #-- <caption> tag (end tag required)
3443: sub start_caption {
3444: my ($target,$token) = @_;
3445: my $currentstring = '';
3446: if ($target eq 'web' || $target eq 'webgrade') {
3447: $currentstring = $token->[4];
3448: }
3449: return $currentstring;
3450: }
3451:
3452: sub end_caption {
3453: my ($target,$token) = @_;
3454: my $currentstring = '';
3455: if ($target eq 'web' || $target eq 'webgrade') {
3456: $currentstring = $token->[2];
3457: }
3458: return $currentstring;
3459: }
3460:
3461: #-- <col> tag (end tag forbdden)
3462: sub start_col {
3463: my ($target,$token) = @_;
3464: my $currentstring = '';
3465: if ($target eq 'web' || $target eq 'webgrade') {
3466: $currentstring = $token->[4];
3467: }
3468: return $currentstring;
3469: }
3470:
3471: sub end_col {
3472: my ($target,$token) = @_;
3473: my $currentstring = '';
3474: if ($target eq 'web' || $target eq 'webgrade') {
3475: $currentstring = $token->[2];
3476: }
3477: return $currentstring;
3478: }
3479:
3480: #-- <colgroup> tag (end tag optional)
3481: sub start_colgroup {
3482: my ($target,$token) = @_;
3483: my $currentstring = '';
3484: if ($target eq 'web' || $target eq 'webgrade') {
3485: $currentstring = $token->[4];
3486: }
3487: return $currentstring;
3488: }
3489:
3490: sub end_colgroup {
3491: my ($target,$token) = @_;
3492: my $currentstring = '';
3493: if ($target eq 'web' || $target eq 'webgrade') {
3494: $currentstring = $token->[2];
3495: }
3496: return $currentstring;
3497: }
3498:
3499: #-- <del> tag (end tag required)
3500: sub start_del {
3501: my ($target,$token) = @_;
3502: my $currentstring = '';
3503: if ($target eq 'web' || $target eq 'webgrade') {
3504: $currentstring = $token->[4];
3505: }
3506: return $currentstring;
3507: }
3508:
3509: sub end_del {
3510: my ($target,$token) = @_;
3511: my $currentstring = '';
3512: if ($target eq 'web' || $target eq 'webgrade') {
3513: $currentstring = $token->[2];
3514: }
3515: return $currentstring;
3516: }
3517:
3518: #-- <fieldset> tag (end tag required)
3519: sub start_fieldset {
3520: my ($target,$token) = @_;
3521: my $currentstring = '';
3522: if ($target eq 'web' || $target eq 'webgrade') {
3523: $currentstring = $token->[4];
3524: }
3525: return $currentstring;
3526: }
3527:
3528: sub end_fieldset {
3529: my ($target,$token) = @_;
3530: my $currentstring = '';
3531: if ($target eq 'web' || $target eq 'webgrade') {
3532: $currentstring = $token->[2];
3533: }
3534: return $currentstring;
3535: }
3536:
3537: #-- <frame> tag (end tag forbidden)
3538: sub start_frame {
3539: my ($target,$token) = @_;
3540: my $currentstring = '';
3541: if ($target eq 'web' || $target eq 'webgrade') {
3542: $currentstring = $token->[4];
3543: }
3544: return $currentstring;
3545: }
3546:
3547: sub end_frame {
3548: my ($target,$token) = @_;
3549: my $currentstring = '';
3550: if ($target eq 'web' || $target eq 'webgrade') {
3551: $currentstring = $token->[2];
3552: }
3553: return $currentstring;
3554: }
3555:
3556: #-- <iframe> tag (end tag required)
3557: sub start_iframe {
3558: my ($target,$token) = @_;
3559: my $currentstring = '';
3560: if ($target eq 'web' || $target eq 'webgrade') {
3561: $currentstring = $token->[4];
3562: }
3563: return $currentstring;
3564: }
3565:
3566: sub end_iframe {
3567: my ($target,$token) = @_;
3568: my $currentstring = '';
3569: if ($target eq 'web' || $target eq 'webgrade') {
3570: $currentstring = $token->[2];
3571: }
3572: return $currentstring;
3573: }
3574:
3575: #-- <ins> tag (end tag required)
3576: sub start_ins {
3577: my ($target,$token) = @_;
3578: my $currentstring = '';
3579: if ($target eq 'web' || $target eq 'webgrade') {
3580: $currentstring = $token->[4];
3581: }
3582: return $currentstring;
3583: }
3584:
3585: sub end_ins {
3586: my ($target,$token) = @_;
3587: my $currentstring = '';
3588: if ($target eq 'web' || $target eq 'webgrade') {
3589: $currentstring = $token->[2];
3590: }
3591: return $currentstring;
3592: }
3593:
3594: #-- <isindex> tag (end tag forbidden)
3595: sub start_isindex {
3596: my ($target,$token) = @_;
3597: my $currentstring = '';
3598: if ($target eq 'web' || $target eq 'webgrade') {
3599: $currentstring = $token->[4];
3600: }
3601: return $currentstring;
3602: }
3603:
3604: sub end_isindex {
3605: my ($target,$token) = @_;
3606: my $currentstring = '';
3607: if ($target eq 'web' || $target eq 'webgrade') {
3608: $currentstring = $token->[2];
3609: }
3610: return $currentstring;
3611: }
3612:
3613: #-- <keygen> tag (end tag forbidden)
3614: sub start_keygen {
3615: my ($target,$token) = @_;
3616: my $currentstring = '';
3617: if ($target eq 'web' || $target eq 'webgrade') {
3618: $currentstring = $token->[4];
3619: }
3620: return $currentstring;
3621: }
3622:
3623: sub end_keygen {
3624: my ($target,$token) = @_;
3625: my $currentstring = '';
3626: if ($target eq 'web' || $target eq 'webgrade') {
3627: $currentstring = $token->[2];
3628: }
3629: return $currentstring;
3630: }
3631:
3632: #-- <label> tag
3633: sub start_label {
3634: my ($target,$token) = @_;
3635: my $currentstring = '';
3636: if ($target eq 'web' || $target eq 'webgrade') {
3637: $currentstring = $token->[4];
3638: }
3639: return $currentstring;
3640: }
3641:
3642: sub end_label {
3643: my ($target,$token) = @_;
3644: my $currentstring = '';
3645: if ($target eq 'web' || $target eq 'webgrade') {
3646: $currentstring = $token->[2];
3647: }
3648: return $currentstring;
3649: }
3650:
3651: #-- <layer> tag (end tag required)
3652: sub start_layer {
3653: my ($target,$token) = @_;
3654: my $currentstring = '';
3655: if ($target eq 'web' || $target eq 'webgrade') {
3656: $currentstring = $token->[4];
3657: }
3658: return $currentstring;
3659: }
3660:
3661: sub end_layer {
3662: my ($target,$token) = @_;
3663: my $currentstring = '';
3664: if ($target eq 'web' || $target eq 'webgrade') {
3665: $currentstring = $token->[2];
3666: }
3667: return $currentstring;
3668: }
3669:
3670: #-- <legend> tag (end tag required)
3671: sub start_legend {
3672: my ($target,$token) = @_;
3673: my $currentstring = '';
3674: if ($target eq 'web' || $target eq 'webgrade') {
3675: $currentstring = $token->[4];
3676: }
3677: return $currentstring;
3678: }
3679:
3680: sub end_legend {
3681: my ($target,$token) = @_;
3682: my $currentstring = '';
3683: if ($target eq 'web' || $target eq 'webgrade') {
3684: $currentstring = $token->[2];
3685: }
3686: return $currentstring;
3687: }
3688:
3689: #-- <link> tag (end tag forbidden)
3690: sub start_link {
3691: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3692: my $currentstring = '';
3693: if ($target eq 'web' || $target eq 'webgrade') {
3694: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3695: undef,1);
3696: &Apache::lonxml::extlink($href);
3697: $currentstring = $token->[4];
3698: }
3699: return $currentstring;
3700: }
3701:
3702: sub end_link {
3703: my ($target,$token) = @_;
3704: my $currentstring = '';
3705: if ($target eq 'web' || $target eq 'webgrade') {
3706: $currentstring = $token->[2];
3707: }
3708: return $currentstring;
3709: }
3710:
3711: #-- <marquee> tag (end tag optional)
3712: sub start_marquee {
3713: my ($target,$token) = @_;
3714: my $currentstring = '';
3715: if ($target eq 'web' || $target eq 'webgrade') {
3716: $currentstring = $token->[4];
3717: }
3718: return $currentstring;
3719: }
3720:
3721: sub end_marquee {
3722: my ($target,$token) = @_;
3723: my $currentstring = '';
3724: if ($target eq 'web' || $target eq 'webgrade') {
3725: $currentstring = $token->[2];
3726: }
3727: return $currentstring;
3728: }
3729:
3730: #-- <multicol> tag (end tag required)
3731: sub start_multicol {
3732: my ($target,$token) = @_;
3733: my $currentstring = &end_p(); # Close any pending <p>
3734: if ($target eq 'web' || $target eq 'webgrade') {
3735: $currentstring .= $token->[4];
3736: }
3737: return $currentstring;
3738: }
3739:
3740: sub end_multicol {
3741: my ($target,$token) = @_;
3742: my $currentstring = '';
3743: if ($target eq 'web' || $target eq 'webgrade') {
3744: $currentstring = $token->[2];
3745: }
3746: return $currentstring;
3747: }
3748:
3749: #-- <nobr> tag (end tag required)
3750: sub start_nobr {
3751: my ($target,$token) = @_;
3752: my $currentstring = '';
3753: if ($target eq 'web' || $target eq 'webgrade') {
3754: $currentstring = $token->[4];
3755: } elsif ($target eq 'tex') {
3756: $currentstring='\mbox{';
3757: }
3758: return $currentstring;
3759: }
3760:
3761: sub end_nobr {
3762: my ($target,$token) = @_;
3763: my $currentstring = '';
3764: if ($target eq 'web' || $target eq 'webgrade') {
3765: $currentstring = $token->[2];
3766: } elsif ($target eq 'tex') {
3767: $currentstring='}';
3768: }
3769: return $currentstring;
3770: }
3771:
3772: #-- <noembed> tag (end tag required)
3773: sub start_noembed {
3774: my ($target,$token) = @_;
3775: my $currentstring = '';
3776: if ($target eq 'web' || $target eq 'webgrade') {
3777: $currentstring = $token->[4];
3778: }
3779: return $currentstring;
3780: }
3781:
3782: sub end_noembed {
3783: my ($target,$token) = @_;
3784: my $currentstring = '';
3785: if ($target eq 'web' || $target eq 'webgrade') {
3786: $currentstring = $token->[2];
3787: }
3788: return $currentstring;
3789: }
3790:
3791: #-- <noframes> tag (end tag required)
3792: sub start_noframes {
3793: my ($target,$token) = @_;
3794: my $currentstring = '';
3795: if ($target eq 'web' || $target eq 'webgrade') {
3796: $currentstring = $token->[4];
3797: }
3798: return $currentstring;
3799: }
3800:
3801: sub end_noframes {
3802: my ($target,$token) = @_;
3803: my $currentstring = '';
3804: if ($target eq 'web' || $target eq 'webgrade') {
3805: $currentstring = $token->[2];
3806: }
3807: return $currentstring;
3808: }
3809:
3810: #-- <nolayer> tag (end tag required)
3811: sub start_nolayer {
3812: my ($target,$token) = @_;
3813: my $currentstring = '';
3814: if ($target eq 'web' || $target eq 'webgrade') {
3815: $currentstring = $token->[4];
3816: }
3817: return $currentstring;
3818: }
3819:
3820: sub end_nolayer {
3821: my ($target,$token) = @_;
3822: my $currentstring = '';
3823: if ($target eq 'web' || $target eq 'webgrade') {
3824: $currentstring = $token->[2];
3825: }
3826: return $currentstring;
3827: }
3828:
3829: #-- <noscript> tag (end tag required)
3830: sub start_noscript {
3831: my ($target,$token) = @_;
3832: my $currentstring = '';
3833: if ($target eq 'web' || $target eq 'webgrade') {
3834: $currentstring = $token->[4];
3835: }
3836: return $currentstring;
3837: }
3838:
3839: sub end_noscript {
3840: my ($target,$token) = @_;
3841: my $currentstring = '';
3842: if ($target eq 'web' || $target eq 'webgrade') {
3843: $currentstring = $token->[2];
3844: }
3845: return $currentstring;
3846: }
3847:
3848: #-- <object> tag (end tag required)
3849: sub start_object {
3850: my ($target,$token) = @_;
3851: my $currentstring = '';
3852: if ($target eq 'web' || $target eq 'webgrade') {
3853: $currentstring = $token->[4];
3854: }
3855: return $currentstring;
3856: }
3857:
3858: sub end_object {
3859: my ($target,$token) = @_;
3860: my $currentstring = '';
3861: if ($target eq 'web' || $target eq 'webgrade') {
3862: $currentstring = $token->[2];
3863: }
3864: return $currentstring;
3865: }
3866:
3867: #-- <optgroup> tag (end tag required)
3868: sub start_optgroup {
3869: my ($target,$token) = @_;
3870: my $currentstring = '';
3871: if ($target eq 'web' || $target eq 'webgrade') {
3872: $currentstring = $token->[4];
3873: }
3874: return $currentstring;
3875: }
3876:
3877: sub end_optgroup {
3878: my ($target,$token) = @_;
3879: my $currentstring = '';
3880: if ($target eq 'web' || $target eq 'webgrade') {
3881: $currentstring = $token->[2];
3882: }
3883: return $currentstring;
3884: }
3885:
3886: #-- <samp> tag (end tag required)
3887: sub start_samp {
3888: my ($target,$token) = @_;
3889: my $currentstring = '';
3890: if ($target eq 'web' || $target eq 'webgrade') {
3891: $currentstring = $token->[4];
3892: } elsif ($target eq 'tex') {
3893: $currentstring='\texttt{';
3894: }
3895: return $currentstring;
3896: }
3897:
3898: sub end_samp {
3899: my ($target,$token) = @_;
3900: my $currentstring = '';
3901: if ($target eq 'web' || $target eq 'webgrade') {
3902: $currentstring = $token->[2];
3903: } elsif ($target eq 'tex') {
3904: $currentstring='}';
3905: }
3906: return $currentstring;
3907: }
3908:
3909: #-- <server> tag
3910: sub start_server {
3911: my ($target,$token) = @_;
3912: my $currentstring = '';
3913: if ($target eq 'web' || $target eq 'webgrade') {
3914: $currentstring = $token->[4];
3915: }
3916: return $currentstring;
3917: }
3918:
3919: sub end_server {
3920: my ($target,$token) = @_;
3921: my $currentstring = '';
3922: if ($target eq 'web' || $target eq 'webgrade') {
3923: $currentstring = $token->[2];
3924: }
3925: return $currentstring;
3926: }
3927:
3928: #-- <spacer> tag (end tag forbidden)
3929: sub start_spacer {
3930: my ($target,$token) = @_;
3931: my $currentstring = &end_p(); # Close off any open <p> tag.
3932: if ($target eq 'web' || $target eq 'webgrade') {
3933: $currentstring .= $token->[4];
3934: }
3935: return $currentstring;
3936: }
3937:
3938: sub end_spacer {
3939: my ($target,$token) = @_;
3940: my $currentstring = '';
3941: if ($target eq 'web' || $target eq 'webgrade') {
3942: $currentstring = $token->[2];
3943: }
3944: return $currentstring;
3945: }
3946:
3947: #-- <span> tag (end tag required)
3948: sub start_span {
3949: my ($target,$token) = @_;
3950: my $currentstring = '';
3951: if ($target eq 'web' || $target eq 'webgrade') {
3952: $currentstring = $token->[4];
3953: }
3954: return $currentstring;
3955: }
3956:
3957: sub end_span {
3958: my ($target,$token) = @_;
3959: my $currentstring = '';
3960: if ($target eq 'web' || $target eq 'webgrade') {
3961: $currentstring = $token->[2];
3962: }
3963: return $currentstring;
3964: }
3965:
3966: #-- <tbody> tag (end tag optional)
3967: sub start_tbody {
3968: my ($target,$token) = @_;
3969: my $currentstring = '';
3970: if ($target eq 'web' || $target eq 'webgrade') {
3971: $currentstring = $token->[4];
3972: }
3973: return $currentstring;
3974: }
3975:
3976: sub end_tbody {
3977: my ($target,$token) = @_;
3978: my $currentstring = '';
3979: if ($target eq 'web' || $target eq 'webgrade') {
3980: $currentstring = $token->[2];
3981: }
3982: return $currentstring;
3983: }
3984:
3985: #-- <tfoot> tag (end tag optional)
3986: sub start_tfoot {
3987: my ($target,$token) = @_;
3988: my $currentstring = '';
3989: if ($target eq 'web' || $target eq 'webgrade') {
3990: $currentstring = $token->[4];
3991: }
3992: return $currentstring;
3993: }
3994:
3995: sub end_tfoot {
3996: my ($target,$token) = @_;
3997: my $currentstring = '';
3998: if ($target eq 'web' || $target eq 'webgrade') {
3999: $currentstring = $token->[2];
4000: }
4001: return $currentstring;
4002: }
4003:
4004: #-- <thead> tag (end tag optional)
4005: sub start_thead {
4006: my ($target,$token) = @_;
4007: my $currentstring = '';
4008: if ($target eq 'web' || $target eq 'webgrade') {
4009: $currentstring = $token->[4];
4010: }
4011: return $currentstring;
4012: }
4013:
4014: sub end_thead {
4015: my ($target,$token) = @_;
4016: my $currentstring = '';
4017: if ($target eq 'web' || $target eq 'webgrade') {
4018: $currentstring = $token->[2];
4019: }
4020: return $currentstring;
4021: }
4022:
4023: #-- <var> tag
4024: sub start_var {
4025: my ($target,$token) = @_;
4026: my $currentstring = '';
4027: if ($target eq 'web' || $target eq 'webgrade') {
4028: $currentstring = $token->[4];
4029: } elsif ($target eq 'tex') {
4030: $currentstring = '\textit{';
4031: }
4032: return $currentstring;
4033: }
4034:
4035: sub end_var {
4036: my ($target,$token) = @_;
4037: my $currentstring = '';
4038: if ($target eq 'web' || $target eq 'webgrade') {
4039: $currentstring = $token->[2];
4040: } elsif ($target eq 'tex') {
4041: $currentstring = '}';
4042: }
4043: return $currentstring;
4044: }
4045:
4046: #-- <wbr> tag (end tag forbidden)
4047: sub start_wbr {
4048: my ($target,$token) = @_;
4049: my $currentstring = '';
4050: if ($target eq 'web' || $target eq 'webgrade') {
4051: $currentstring = $token->[4];
4052: }
4053: return $currentstring;
4054: }
4055:
4056: sub end_wbr {
4057: my ($target,$token) = @_;
4058: my $currentstring = '';
4059: if ($target eq 'web' || $target eq 'webgrade') {
4060: $currentstring = $token->[2];
4061: }
4062: return $currentstring;
4063: }
4064:
4065: #-- <hideweboutput> tag
4066: sub start_hideweboutput {
4067: my ($target,$token) = @_;
4068: if ($target eq 'web' || $target eq 'webgrade') {
4069: &Apache::lonxml::startredirection();
4070: }
4071: return '';
4072: }
4073:
4074: sub end_hideweboutput {
4075: my ($target,$token) = @_;
4076: my $currentstring = '';
4077: if ($target eq 'web' || $target eq 'webgrade') {
4078: $currentstring = &Apache::lonxml::endredirection();
4079: }
4080: return '';
4081: }
4082:
4083:
4084: sub image_replication {
4085: my $src = shift;
4086: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4087: #replicates eps or ps
4088: my $epssrc = my $pssrc = $src;
4089: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4090: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4091: if (not -e $epssrc && not -e $pssrc) {
4092: my $result=&Apache::lonnet::repcopy($epssrc);
4093: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4094: }
4095: return '';
4096: }
4097: #
4098: # Get correct sizing parameter for an image given
4099: # it's initial ht. and wid. This allows sizing of
4100: # images that are generated on-the-fly (e.g. gnuplot)
4101: # as well as serving as a utility for image_size.
4102: #
4103: # Parameter:
4104: # height_param
4105: # width_param - Initial picture dimensions.
4106: # scaling - A scale factor.
4107: # parstack, - the current stack of tag attributes
4108: # from the xml parser
4109: # safeeval, - pointer to the safespace
4110: # depth, - from what level in the stack to look for attributes
4111: # (assumes -1 if unspecified)
4112: # cis - look for attrubutes case insensitively
4113: # (assumes false)
4114: #
4115: # Returns:
4116: # height, width - new dimensions.
4117: #
4118: sub resize_image {
4119: my ($height_param, $width_param, $scaling,
4120: $parstack, $safeeval, $depth, $cis) = @_;
4121:
4122: # First apply the scaling...
4123:
4124: $height_param = $height_param * $scaling;
4125: $width_param = $width_param * $scaling;
4126:
4127: #do we have any specified LaTeX size of the picture?
4128: my $toget='TeXwidth';
4129: if ($cis) {
4130: $toget=lc($toget);
4131: }
4132: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4133: $safeeval,$depth,$cis);
4134: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4135: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4136: $safeeval,$depth,$cis);
4137: #do we have any specified web size of the picture?
4138: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4139: $depth,1);
4140: if ($TeXwidth) {
4141: my $old_width_param=$width_param;
4142: if ($TeXwidth=~/(\d+)\s*\%/) {
4143: $width_param = $1*$env{'form.textwidth'}/100;
4144: } else {
4145: $width_param = $TeXwidth;
4146: }
4147: if ($TeXheight) {
4148: $height_param = $TeXheight;
4149: } elsif ($old_width_param) {
4150: $height_param=$TeXwidth/$old_width_param*$height_param;
4151: }
4152: } elsif ($TeXheight) {
4153: $height_param = $TeXheight;
4154: if ($height_param) {
4155: $width_param = $TeXheight/$height_param*$width_param;
4156: }
4157: } elsif ($width) {
4158: my $old_width_param=$width_param;
4159: $width_param = $width*$scaling;
4160: if ($old_width_param) {
4161: $height_param=$width_param/$old_width_param*$height_param;
4162: }
4163: }
4164: if ($width_param > $env{'form.textwidth'}) {
4165: my $old_width_param=$width_param;
4166: $width_param =0.95*$env{'form.textwidth'};
4167: if ($old_width_param) {
4168: $height_param=$width_param/$old_width_param*$height_param;
4169: }
4170: }
4171:
4172: return ($height_param, $width_param);
4173: }
4174:
4175: sub image_size {
4176: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4177:
4178: #size of image from gif/jpg/jpeg/png
4179: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4180: if (-e $ressrc) {
4181: $src = $ressrc;
4182: }
4183: my $image = Image::Magick->new;
4184: my $current_figure = $image->Read($src);
4185: my $width_param = $image->Get('width');
4186: my $height_param = $image->Get('height');
4187: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4188: undef($image);
4189:
4190: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4191: $scaling, $parstack, $safeeval,
4192: $depth, $cis);
4193:
4194: return ($height_param, $width_param);
4195: }
4196:
4197: sub image_width {
4198: my ($height, $width) = &image_size(@_);
4199: return $width;
4200: }
4201: # Not yet 100% sure this is correct in all circumstances..
4202: # due to my uncertainty about mods to image_size.
4203: #
4204: sub image_height {
4205: my ($height, $width) = &image_size(@_);
4206: return $height;
4207: }
4208:
4209: sub get_eps_image {
4210: my ($src)=@_;
4211: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4212:
4213: # In order to prevent the substitution of the alt text, we need to
4214: # be sure the orig_src file is on system now so:
4215:
4216: if (! -e $orig_src) {
4217: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4218: }
4219: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4220: my ($spath, $sname, $sext) = &fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4221: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4222: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4223: &Apache::lonxml::debug("Filelocation gives: $src");
4224: if (! -e $src) {
4225: &Apache::lonxml::debug("$src does not exist");
4226: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4227: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4228: #if replication failed try to find ps file
4229: $src=~s/\.eps$/\.ps/;
4230: &Apache::lonxml::debug("Now looking for $src");
4231: #if no ps file try to replicate it.
4232: my $didrepcopy = &Apache::lonnet::repcopy($src);
4233: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4234: if ( (not -e $src) ||
4235: ($didrepcopy ne 'ok')) {
4236: &Apache::lonxml::debug("Failed to find or replicate $src");
4237:
4238: #if replication failed try to produce eps file dynamically
4239: $src=~s/\.ps$/\.eps/;
4240: my $temp_file;
4241: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4242: my $newsrc=$orig_src;
4243: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4244: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4245: print FILE ("$newsrc\n");
4246: close(FILE);
4247: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4248: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4249: if ($sext ne "") { # Put the ext. back in to uniquify.
4250: $src =~ s/\.eps$/$sext.eps/;
4251: }
4252:
4253: }
4254:
4255: }
4256: } else {
4257: # If the postscript file has spaces in its name,
4258: # LaTeX will gratuitiously vomit. Therefore
4259: # queue such files for copy with " " replaced by "_".
4260: # printout.pm will know them by their .ps or .eps extensions.
4261: my $newsrc = $orig_src;
4262: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4263: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4264: print FILE "$src\n";
4265: close FILE;
4266: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4267: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4268: }
4269: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4270: $path =~ s/ /\_/g;
4271: $file =~ s/ /\_/g;
4272: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4273: return ($path.'/',$file);
4274: }
4275:
4276: sub eps_generation {
4277: my ($src,$file,$width_param) = @_;
4278: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4279: my $temp_file = Apache::File->new('>>'.$filename);
4280: print $temp_file "$src\n";
4281: my $newsrc = $src;
4282: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4283: $newsrc=~s{/home/httpd/html/res}{};
4284: $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
4285: $newsrc=~s{/\./}{/};
4286: $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
4287: if ($newsrc=~m{/home/httpd/lonUsers/}) {
4288: $newsrc=~s{/home/httpd/lonUsers}{};
4289: $newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
4290: }
4291: if ($newsrc=~m{/userfiles/}) {
4292: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4293: } else {
4294: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4295: }
4296: }
4297:
4298: sub file_path {
4299: my $src=shift;
4300: my ($file,$path);
4301: if ($src =~ m!(.*)/([^/]*)$!) {
4302: $file = $2;
4303: $path = $1.'/';
4304: }
4305: return $file,$path;
4306: }
4307: # Converts a measurement in to mm from any of
4308: # the other valid LaTeX units of measure.
4309: # If the units of measure are missing from the
4310: # parameter, it is assumed to be in and returned
4311: # with mm units of measure
4312: sub recalc {
4313: my $argument = shift;
4314: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4315: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4316: my $value=$1;
4317: my $units=$2;
4318: if ($units eq 'cm') {
4319: $value*=10;
4320: } elsif ($units eq 'in') {
4321: $value*=25.4;
4322: } elsif ($units eq 'pc') {
4323: $value*=(25.4*12/72.27);
4324: } elsif ($units eq 'pt') {
4325: $value*=(25.4/72.27);
4326: }
4327: return $value.' mm';
4328: }
4329:
4330: sub LATEX_length {
4331: my $garbage=shift;
4332: $garbage=~s/^\s+$//;
4333: $garbage=~s/^\s+(\S.*)/$1/;#space before
4334: $garbage=~s/(.*\S)\s+$/$1/;#space after
4335: $garbage=~s/(\s)+/$1/;#only one space
4336: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4337: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4338: $garbage=~s/([^\\])\$/$1/g;#$
4339: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4340: $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;
4341: $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;
4342: $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;
4343: $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;
4344: $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;
4345: $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;
4346: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4347: #remove some other LaTeX command
4348: $garbage=~s|\\(\w+)\\|\\|g;
4349: $garbage=~s|\\(\w+)(\s*)|$2|g;
4350: $garbage=~s|\+|11|g;
4351: my $value=length($garbage);
4352: return $value;
4353: }
4354:
4355: # Wrap image 'stuff' inside of the LaTeX required to implement
4356: # alignment:
4357: # align_tex_image(align, latex_rendering, image)
4358: # Where:
4359: # align - The HTML alignment specification.
4360: # latex_rendering - rendering hint for latex.
4361: # image - The LaTeX needed to insert the image itsef.
4362: # width,height - dimensions of the image.
4363: #
4364: sub align_latex_image {
4365: my ($align, $latex_rendering, $image, $width, $height) = @_;
4366: my $currentstring; # The result.
4367:
4368: # If there's an alignment specification we need to honor it here.
4369: # For the horizontal alignments, we will also honor the
4370: # value of the latex specfication. The default is parbox,
4371: # and that's used for illegal values too.
4372: #
4373: # Even though we set a default alignment value, the user
4374: # could have given us an illegal value. In that case we
4375: # just use the default alignment of bottom..
4376: if ($align eq "top") {
4377: $currentstring = '\raisebox{-'.$height.'mm}{'.$image.'}';
4378: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
4379: my $offset = $height/2;
4380: $currentstring = '\raisebox{-'.$offset.'mm}{'.$image.'}';
4381: } elsif ($align eq "left") {
4382: if ($latex_rendering eq "parpic") {
4383: $currentstring = '\parpic[l]{'.$image.'}';
4384: } elsif ($latex_rendering eq "parbox") {
4385: $currentstring = '\begin{minipage}[l]{'.$width.'mm}'
4386: .$image.'\end{minipage}';
4387: } elsif ($latex_rendering eq "wrapfigure"
4388: || $latex_rendering ne 'none') { # wrapfig render
4389: $currentstring =
4390: '\begin{wrapfigure}{l}{'.$width.'mm}'
4391: .'\scalebox{1.0}{'.$image.'}\end{wrapfigure}';
4392: }
4393: } elsif ($align eq "right") {
4394: if ($latex_rendering eq "parpic") {
4395: $currentstring = '\parpic[r]{'.$image.'}';
4396: } elsif ($latex_rendering eq "parbox") {
4397: $currentstring = '\begin{minipage}[r]{'.$width.'mm}'
4398: .$image.'\end{minipage}';
4399: } elsif ($latex_rendering eq "wrapfigure"
4400: || $latex_rendering ne 'none') { # wrapfig render
4401: $currentstring =
4402: '\begin{wrapfigure}{r}{'.$width.'mm}'
4403: .'\scalebox{1.0}{'.$image.'}\end{wrapfigure}';
4404: }
4405: } else { # Bottom is also default.
4406: # $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
4407: $currentstring = $image;
4408: }
4409: return $currentstring;
4410: }
4411:
4412: # is_inside_of $tagstack $tag
4413: # This sub returns true if the current state of Xml processing
4414: # is inside of the tag.
4415: # Parameters:
4416: # tagstack - The tagstack from the parser.
4417: # tag - The tag (without the <>'s.).
4418: # Sample usage:
4419: # if (is_inside_of($tagstack "table")) {
4420: # # I'm in a table....
4421: # }
4422: sub is_inside_of {
4423: my ($tagstack, $tag) = @_;
4424: my @stack = @$tagstack;
4425: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4426: if ($stack[$i] eq $tag) {
4427: return 1;
4428: }
4429: }
4430: return 0;
4431: }
4432:
4433:
4434: 1;
4435: __END__
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