1: # The LearningOnline Network with CAPA
2: # Tags Default Definition Module
3: #
4: # $Id: londefdef.pm,v 1.341 2006/11/06 11:39:02 foxr Exp $
5: #
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into
30: # binary executable programs or libraries distributed by the
31: # Michigan State University (the "Licensee"), but any binaries so
32: # distributed are hereby licensed only for use in the context
33: # of a program or computational system for which the Licensee is the
34: # primary author or distributor, and which performs substantial
35: # additional tasks beyond the translation of (La)TeX into HTML.
36: # The C source of the Code may not be distributed by the Licensee
37: # to any other parties under any circumstances.
38: #
39:
40: package Apache::londefdef;
41:
42: use Apache::lonnet;
43: use strict;
44: use Apache::lonxml;
45: use Apache::File();
46: use Image::Magick;
47: use Apache::lonmenu();
48: use Apache::lonmeta();
49: use Apache::Constants qw(:common);
50: use File::Basename;
51: # use Data::Dumper;
52:
53: BEGIN {
54:
55: &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
56:
57: }
58:
59: #
60: # Dumps all elements of the table structure.
61: # Need this 'cause evidently when given an array, Data::Dumper only seems
62: # to dump element 0.
63: #
64: #sub debug_dump_table {
65: # my $lastrow = $#Apache::londefdef::table;
66: # &Apache::lonnet::logthis("Dumping table: Last row index: $lastrow");
67: # my $row;
68: # for ($row =0; $row <= $lastrow; $row++ ) {
69: # my $text = Dumper($Apache::londefdef::table[$row]);
70: # &Apache::lonnet::logthis("table [ $row ]".$text);
71: # }
72: #}
73: sub initialize_londefdef {
74: $Apache::londefdef::TD_redirection=0;
75: @Apache::londefdef::table = ();
76: $Apache::londefdef::select=0;
77: undef(@Apache::londefdef::description);
78: @Apache::londefdef::DD=(0);
79: @Apache::londefdef::DT=(0);
80: @Apache::londefdef::seenDT=(0);
81: $Apache::londefdef::list_index=0;
82: undef($Apache::londefdef::head);
83: undef($Apache::londefdef::title);
84: }
85:
86: #======================= TAG SUBROUTINES =====================
87: #-- <output>
88: sub start_output {
89: my ($target) = @_;
90: if ($target eq 'meta') { $Apache::lonxml::metamode--; }
91: return '';
92: }
93: sub end_output {
94: my ($target) = @_;
95: if ($target eq 'meta') { $Apache::lonxml::metamode++; }
96: return '';
97: }
98: #-- <m> tag
99: sub start_m {
100: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
101: my $currentstring = '';
102: my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
103: if ($target eq 'web' || $target eq 'analyze') {
104: &Apache::lonxml::debug("M is starting with:$inside:");
105: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
106: if ($eval eq 'on') {
107: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
108: #&Apache::lonxml::debug("M is evaulated to:$inside:");
109: }
110: my $tex = $inside;
111: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
112: $currentstring = &Apache::lontexconvert::converted(\$inside,$display);
113: if ($Apache::lontexconvert::errorstring) {
114: my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occured while attempting to convert this TeX: <pre>';
115: $tex = &HTML::Entities::encode($tex,'<>&"');
116: my ($linenumber) =
117: ($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
118: if (defined($linenumber)) {
119: my @tex=split("\n",$tex);
120: $tex[$linenumber]='<b><font color="red">'.
121: $tex[$linenumber].'</font></b>';
122: $tex=join("\n",@tex);
123: }
124: &Apache::lonxml::warning($errormsg.$tex.'</pre>');
125: $Apache::lontexconvert::errorstring='';
126: }
127: #&Apache::lonxml::debug("M is ends with:$currentstring:");
128: $Apache::lonxml::post_evaluate=0;
129: } elsif ($target eq 'tex') {
130: $currentstring = $inside;
131: my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
132: if ($eval eq 'on') {
133: $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
134: }
135: if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
136: # detect simple math mode entry exits, and convert them
137: # to use \ensuremath
138: if ($currentstring=~/^\s*\$[^\$].*[^\$]\$\s*$/) {
139: $currentstring=~s/^(\s*)\$/$1/;
140: $currentstring=~s/\$(\s*)$/$1/;
141: $currentstring='\ensuremath{'.$currentstring.'}';
142: }
143: $Apache::lonxml::post_evaluate=0;
144: }
145: return $currentstring;
146: }
147:
148: sub end_m {
149: my ($target,$token) = @_;
150: my $currentstring = '';
151: if ($target eq 'tex') {
152: $currentstring = "";
153: }
154: return $currentstring;
155: }
156:
157: sub start_tthoption {
158: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
159: my $result;
160: if ($target eq 'web' || $target eq 'webgrade') {
161: my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
162: $style);
163: $inside=~s/^\s*//;
164: if ($env{'browser.mathml'}) {
165: &tth::ttmoptions($inside);
166: } else {
167: &tth::tthoptions($inside);
168: }
169: }
170: return $result;
171: }
172:
173: sub end_tthoption {
174: my ($target,$token) = @_;
175: my $result;
176: return $result;
177: }
178:
179: #-- <html> tag (end tag optional)
180: sub start_html {
181: my ($target,$token) = @_;
182: my $currentstring = '';
183: if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
184: # start_body() takes care of emitting the <html>
185: } elsif ($target eq 'tex') {
186: $currentstring .=
187: '\documentclass[letterpaper,twoside]{article}\raggedbottom';
188: if (($env{'form.latex_type'}=~'batchmode') ||
189: (!$env{'request.role.adv'})) {$currentstring .='\batchmode';}
190: $currentstring .= '\newcommand{\keephidden}[1]{}'.
191: '\renewcommand{\deg}{$^{\circ}$}'.
192: '\usepackage{multirow}'.
193: '\usepackage{longtable}'.
194: '\usepackage{textcomp}'.
195: '\usepackage{makeidx}'.
196: '\usepackage[dvips]{graphicx}'.
197: '\usepackage{wrapfig}'.
198: '\usepackage{picins}'.
199: '\usepackage{epsfig}'.
200: '\usepackage{calc}'.
201: '\usepackage{amsmath}'.
202: '\usepackage{amssymb}'.
203: '\usepackage{amsfonts}'.
204: '\usepackage{amsthm}'.
205: '\usepackage{amscd}'.
206: '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'.
207: '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}';
208: }
209: return $currentstring;
210: }
211:
212: sub end_html {
213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
214: my $currentstring = '';
215: if ($target eq 'web' || $target eq 'webgrade') {
216: # end_body takes care of the </html>
217: }
218: return $currentstring;
219: }
220:
221: #-- <head> tag (end tag optional)
222: sub start_head {
223: my ($target,$token) = @_;
224: my $currentstring = '';
225: if ($target eq 'web' || $target eq 'webgrade') {
226: &Apache::lonxml::startredirection();
227: }
228: return $currentstring;
229: }
230:
231: sub end_head {
232: my ($target,$token) = @_;
233: my $currentstring = '';
234: if (($target eq 'web' && $env{'request.state'} eq 'published') ||
235: ($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
236: # in case there is a </head> but no <head>
237: if ($Apache::lonxml::redirection) {
238: $Apache::londefdef::head = &Apache::lonxml::endredirection();
239: }
240: }
241: return $currentstring;
242: }
243:
244: #-- <map> tag (end tag required)
245: sub start_map {
246: my ($target,$token) = @_;
247: my $currentstring = '';
248: if ($target eq 'web' || $target eq 'webgrade') {
249: $currentstring = $token->[4];
250: }
251: return $currentstring;
252: }
253:
254: sub end_map {
255: my ($target,$token) = @_;
256: my $currentstring = '';
257: if ($target eq 'web' || $target eq 'webgrade') {
258: $currentstring = $token->[2];
259: }
260: return $currentstring;
261: }
262:
263: #-- <select> tag (end tag required)
264: sub start_select {
265: my ($target,$token) = @_;
266: my $currentstring = '';
267: if ($target eq 'web' || $target eq 'webgrade') {
268: $currentstring = $token->[4];
269: } elsif ($target eq 'tex') {
270: $Apache::londefdef::select=0;
271: }
272: return $currentstring;
273: }
274:
275: sub end_select {
276: my ($target,$token) = @_;
277: my $currentstring = '';
278: if ($target eq 'web' || $target eq 'webgrade') {
279: $currentstring = $token->[2];
280: }
281: return $currentstring;
282: }
283:
284: #-- <option> tag (end tag optional)
285: sub start_option {
286: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
287: my $currentstring = '';
288: if ($target eq 'web' || $target eq 'webgrade') {
289: $currentstring = $token->[4];
290: } elsif ($target eq 'tex') {
291: $Apache::londefdef::select++;
292: if ($Apache::londefdef::select == 1) {
293: $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
294: } else {
295: $currentstring='\keephidden{';
296: }
297: }
298: return $currentstring;
299: }
300:
301: sub end_option {
302: my ($target,$token) = @_;
303: my $currentstring = '';
304: if ($target eq 'web' || $target eq 'webgrade') {
305: $currentstring = $token->[2];
306: } elsif ($target eq 'tex') {
307: $currentstring='}';
308: }
309: return $currentstring;
310: }
311:
312: #-- <input> tag (end tag forbidden)
313: sub start_input {
314: my ($target,$token) = @_;
315: my $currentstring = '';
316: if ($target eq 'web' || $target eq 'webgrade') {
317: $currentstring = $token->[4];
318: }
319: return $currentstring;
320: }
321:
322: sub end_input {
323: my ($target,$token) = @_;
324: my $currentstring = '';
325: if ($target eq 'web' || $target eq 'webgrade') {
326: $currentstring = $token->[2];
327: }
328: return $currentstring;
329: }
330:
331: #-- <textarea> tag (end tag required)
332: sub start_textarea {
333: my ($target,$token) = @_;
334: my $currentstring = '';
335: if ($target eq 'web' || $target eq 'webgrade') {
336: $currentstring = $token->[4];
337: }
338: return $currentstring;
339: }
340:
341: sub end_textarea {
342: my ($target,$token) = @_;
343: my $currentstring = '';
344: if ($target eq 'web' || $target eq 'webgrade') {
345: $currentstring = $token->[2];
346: }
347: return $currentstring;
348: }
349:
350: #-- <form> tag (end tag required)
351: sub start_form {
352: my ($target,$token) = @_;
353: my $currentstring = '';
354: if ($target eq 'web' || $target eq 'webgrade') {
355: $currentstring = $token->[4];
356: }
357: return $currentstring;
358: }
359:
360: sub end_form {
361: my ($target,$token) = @_;
362: my $currentstring = '';
363: if ($target eq 'web' || $target eq 'webgrade') {
364: $currentstring = $token->[2];
365: }
366: return $currentstring;
367: }
368:
369: #-- <title> tag (end tag required)
370: sub start_title {
371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
372: my $currentstring = '';
373: if ($target eq 'web' || $target eq 'webgrade') {
374: $Apache::londefdef::title =
375: &Apache::lonxml::get_all_text('/title',$parser,$style);
376: } elsif ($target eq 'tex') {
377: $currentstring .= '\keephidden{Title of the document: '
378: }
379: if ($target eq 'meta') {
380: $currentstring='<title>';
381: &start_output($target);
382: }
383: return $currentstring;
384: }
385:
386: sub end_title {
387: my ($target,$token) = @_;
388: my $currentstring = '';
389: if ($target eq 'web' || $target eq 'webgrade') {
390: # start_title takes care of swallowing the title
391: } elsif ($target eq 'tex') {
392: $currentstring .= '}';
393: }
394: if ($target eq 'meta') {
395: &end_output($target);
396: $currentstring='</title>';
397: }
398: return $currentstring;
399: }
400:
401: #-- <meta> tag (end tag forbidden)
402: sub start_meta {
403: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
404: my $currentstring = '';
405: if ($target eq 'web' || $target eq 'webgrade') {
406: my $args='';
407: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
408: if ($args eq '') {
409: &Apache::lonxml::get_all_text("/meta",$parser,$style);
410: } else {
411: $currentstring = $token->[4];
412: }
413: } elsif ($target eq 'meta') {
414: unless (&Apache::lonxml::get_param
415: ('http-equiv',$parstack,$safeeval,undef,1)) {
416: my $name=$token->[2]->{'name'};
417: $name=~tr/A-Z/a-z/;
418: $name=~s/\s/\_/gs;
419: $name=~s/\W//gs;
420: if ($name) {
421: $currentstring='<'.$name;
422: my $display=&Apache::lonxml::get_param
423: ('display',$parstack,$safeeval,undef,1);
424: if ($display) {
425: $display=~s/\"/\'/g;
426: $currentstring.=' display="'.$display.'"';
427: }
428: $currentstring.='>'.
429: &Apache::lonxml::get_param
430: ('content',$parstack,$safeeval,undef,1).
431: '</'.$name.'>';
432: }
433: my $display=&Apache::lonxml::get_param
434: ('display',$parstack,$safeeval,undef,1);
435: if ($display) {
436: $display=&HTML::Entities::encode($display,'<>&"');
437: $currentstring.='<'.$name.'.display>'.$display.
438: '</'.$name.'.display>';
439: }
440: }
441: } elsif ($target eq 'tex') {
442: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
443: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
444: if ((not defined $content) && (not defined $name)) {
445: &Apache::lonxml::startredirection();
446: }
447: }
448: return $currentstring;
449: }
450:
451: sub end_meta {
452: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
453: my $currentstring = '';
454: if ($target eq 'web' || $target eq 'webgrade') {
455: my $args='';
456: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
457: if ($args ne '') {
458: $currentstring = $token->[4];
459: }
460: } elsif ($target eq 'tex') {
461: my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
462: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
463: if ((not defined $content) && (not defined $name)) {
464: &Apache::lonxml::endredirection();
465: }
466: }
467: return $currentstring;
468: }
469:
470: # accessrule
471: sub start_accessrule {
472: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
473: my $currentstring = '';
474: my $eff=&Apache::lonxml::get_param
475: ('effect',$parstack,$safeeval,undef,1);
476: my $realm=&Apache::lonxml::get_param
477: ('realm',$parstack,$safeeval,undef,1);
478: my $role=&Apache::lonxml::get_param
479: ('role',$parstack,$safeeval,undef,1);
480: $realm=~s/\s+//g;
481: $realm=~s/\//\_/g;
482: $realm=~s/^\_//;
483: $realm=~s/\W/\;/g;
484: $role=~s/\s+//g;
485: $role=~s/\//\_/g;
486: $role=~s/\W/\;/g;
487: if ($target eq 'web') {
488: my $args='';
489: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
490: if ($args eq '') {
491: &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
492: } else {
493: $currentstring = $token->[4];
494: }
495: }
496: if ($target eq 'meta') {
497: $currentstring='<rule>'.$eff.':'.$realm.':'.$role.'</rule>';
498: }
499: return $currentstring;
500: }
501:
502: sub end_accessrule {
503: my ($target,$token,$tagstack,$parstack,$parser) = @_;
504: my $currentstring = '';
505: if ($target eq 'web') {
506: my $args='';
507: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
508: if ($args ne '') {
509: $currentstring = $token->[4];
510: }
511: }
512: return $currentstring;
513: }
514:
515: #-- <body> tag (end tag required)
516: sub start_body {
517: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
518: my $currentstring = '';
519:
520: if ($target eq 'web' || $target eq 'webgrade') {
521: if ($Apache::lonhomework::parsing_a_problem) {
522: &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
523: return '';
524: }
525:
526: if (&is_inside_of($tagstack, "head")) {
527: &end_head(@_);
528: }
529: $currentstring =
530: &Apache::loncommon::start_page($Apache::londefdef::title,
531: $Apache::londefdef::head,
532: {'add_entries' => $token->[2],
533: 'no_title' => 1,
534: 'force_register' => 1});
535:
536: if ($env{'request.state'} ne 'published') {
537: $currentstring.=&Apache::lonmenu::constspaceform();
538: $currentstring.=(<<EDITBUTTON);
539: <form method="post">
540: <input type="submit" name="editmode" accesskey="e" value="Edit" />
541: </form>
542: <br />
543: EDITBUTTON
544: }
545: $currentstring.=&Apache::lonxml::message_location();
546: } elsif ($target eq 'tex') {
547: $currentstring = '\begin{document}';
548: }
549: return $currentstring;
550: }
551:
552: sub end_body {
553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
554: my $currentstring = &end_p(); # Close off unclosed <p>
555: if ($target eq 'web' || $target eq 'webgrade') {
556: $currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
557: } elsif ($target eq 'tex') {
558: $currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
559: }
560: return $currentstring;
561: }
562:
563: # \begin{center} causes a new paragprah spacing that looks odd inside
564: # of a table cell. Same at the end of a \center but with a slightly
565: # larger space .. hence center_correction and center_end_correction.
566: #
567: sub center_correction { return '\vspace*{-6 mm}'; }
568: sub center_end_correction { return '\vspace*{-7 mm}'; }
569:
570: #-- <center> tag (end tag required)
571: sub start_center {
572: my ($target,$token,$tagstack) = @_;
573: my $currentstring = &end_p(); # Close off any prior para.
574: if ($target eq 'web' || $target eq 'webgrade') {
575: $currentstring .= $token->[4];
576: } elsif ($target eq 'tex') {
577: if (&is_inside_of($tagstack, "table")) {
578: $currentstring .= ¢er_correction();
579: }
580: $currentstring .= '\begin{center}';
581: }
582: return $currentstring;
583: }
584:
585: sub end_center {
586: my ($target,$token,$tagstack) = @_;
587: my $currentstring = '';
588: if ($target eq 'web' || $target eq 'webgrade') {
589: $currentstring = $token->[2];
590: } elsif ($target eq 'tex') {
591: $currentstring = '\end{center}';
592: if (&is_inside_of($tagstack, "table")) {
593: $currentstring .= ¢er_end_correction();
594: }
595: }
596: return $currentstring;
597: }
598:
599: #-- <b> tag (end tag required)
600: # NOTE: In TeX mode disables internal <p>
601: sub start_b {
602: my ($target,$token) = @_;
603: my $currentstring = '';
604: if ($target eq 'web' || $target eq 'webgrade') {
605: $currentstring = $token->[4];
606: } elsif ($target eq 'tex') {
607: &disable_para();
608: $currentstring .= '\textbf{';
609: }
610: return $currentstring;
611: }
612:
613: sub end_b {
614: my ($target,$token) = @_;
615: my $currentstring = '';
616: if ($target eq 'web' || $target eq 'webgrade') {
617: $currentstring = $token->[2];
618: } elsif ($target eq 'tex') {
619: &enable_para();
620: $currentstring = '}';
621: }
622: return $currentstring;
623: }
624:
625: #-- <strong> tag (end tag required)
626: # NOTE: in TeX mode disables internal <p>
627: sub start_strong {
628: my ($target,$token) = @_;
629: my $currentstring = '';
630: if ($target eq 'web' || $target eq 'webgrade') {
631: $currentstring = $token->[4];
632: } elsif ($target eq 'tex') {
633: &disable_para();
634: $currentstring = '\textbf{';
635: }
636: return $currentstring;
637: }
638:
639: sub end_strong {
640: my ($target,$token) = @_;
641: my $currentstring = '';
642: if ($target eq 'web' || $target eq 'webgrade') {
643: $currentstring = $token->[2];
644: } elsif ($target eq 'tex') {
645: &enable_para();
646: $currentstring = '}';
647: }
648: return $currentstring;
649: }
650:
651: #-- <h1> tag (end tag required)
652: sub start_h1 {
653: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
654: my $currentstring = &end_p(); # Close off any prior para.
655: if ($target eq 'web' || $target eq 'webgrade') {
656: $currentstring .= $token->[4];
657: } elsif ($target eq 'tex') {
658: my $pre;
659: my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
660: if ($align eq 'center') {
661: $pre='\begin{center}';
662: } elsif ($align eq 'left') {
663: $pre='\rlap{';
664: } elsif ($align eq 'right') {
665: $pre=' \hfill \llap{';
666: }
667: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
668: if (not defined $TeXsize) {$TeXsize="large";}
669: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
670: } elsif ($target eq 'meta') {
671: $currentstring.='<subject>';
672: &start_output($target);
673: }
674: return $currentstring;
675: }
676:
677: sub end_h1 {
678: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
679: my $currentstring = '';
680: if ($target eq 'web' || $target eq 'webgrade') {
681: $currentstring .= $token->[2];
682: } elsif ($target eq 'tex') {
683: my $post='\vskip 0 mm ';
684: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
685: if ($align eq 'center') {
686: $post='\end{center}';
687: } elsif ($align eq 'left') {
688: $post='} \hfill'.'\vskip 0 mm ';
689: } elsif ($align eq 'right') {
690: $post='}'.'\vskip 0 mm ';
691: }
692: $currentstring .= '}}'.$post;
693: } elsif ($target eq 'meta') {
694: &end_output($target);
695: $currentstring='</subject>';
696: }
697: return $currentstring;
698: }
699:
700: #-- <h2> tag
701: sub start_h2 {
702: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
703: my $currentstring = &end_p(); # Close off any prior para.
704: if ($target eq 'web' || $target eq 'webgrade') {
705: $currentstring .= $token->[4];
706: } elsif ($target eq 'tex') {
707: my $pre;
708: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
709: if ($align eq 'center') {
710: $pre='\begin{center}';
711: } elsif ($align eq 'left') {
712: $pre='\rlap{';
713: } elsif ($align eq 'right') {
714: $pre=' \hfill \llap{';
715: }
716: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
717: if (not defined $TeXsize) {$TeXsize="large";}
718: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
719: }
720: return $currentstring;
721: }
722:
723: sub end_h2 {
724: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
725: my $currentstring = '';
726: if ($target eq 'web' || $target eq 'webgrade') {
727: $currentstring .= $token->[2];
728: } elsif ($target eq 'tex') {
729: my $post='\vskip 0 mm ';
730: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
731: if ($align eq 'center') {
732: $post='\end{center}';
733: } elsif ($align eq 'left') {
734: $post='} \hfill'.'\vskip 0 mm ';
735: } elsif ($align eq 'right') {
736: $post='}'.'\vskip 0 mm ';
737: }
738: $currentstring .= '}}'.$post;
739: }
740: return $currentstring;
741: }
742:
743: #-- <h3> tag
744: sub start_h3 {
745: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
746: my $currentstring = &end_p(); # Close off any prior para.
747: if ($target eq 'web' || $target eq 'webgrade') {
748: $currentstring .= $token->[4];
749: } elsif ($target eq 'tex') {
750: my $pre;
751: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
752: if ($align eq 'center') {
753: $pre='\begin{center}';
754: } elsif ($align eq 'left') {
755: $pre='\rlap{';
756: } elsif ($align eq 'right') {
757: $pre=' \hfill \llap{';
758: }
759: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
760: if (not defined $TeXsize) {$TeXsize="large";}
761: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
762: }
763: return $currentstring;
764: }
765:
766: sub end_h3 {
767: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
768: my $currentstring = '';
769: if ($target eq 'web' || $target eq 'webgrade') {
770: $currentstring .= $token->[2];
771: } elsif ($target eq 'tex') {
772: my $post='\vskip 0 mm ';
773: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
774: if ($align eq 'center') {
775: $post='\end{center}';
776: } elsif ($align eq 'left') {
777: $post='} \hfill'.'\vskip 0 mm ';
778: } elsif ($align eq 'right') {
779: $post='}'.'\vskip 0 mm ';
780: }
781: $currentstring .= '}}'.$post;
782: }
783: return $currentstring;
784: }
785:
786: #-- <h4> tag
787: sub start_h4 {
788: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
789: my $currentstring = &end_p(); # Close off any prior para.
790: if ($target eq 'web' || $target eq 'webgrade') {
791: $currentstring .= $token->[4];
792: } elsif ($target eq 'tex') {
793: my $pre;
794: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
795: if ($align eq 'center') {
796: $pre='\begin{center}';
797: } elsif ($align eq 'left') {
798: $pre='\rlap{';
799: } elsif ($align eq 'right') {
800: $pre=' \hfill \llap{';
801: }
802: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
803: if (not defined $TeXsize) {$TeXsize="large";}
804: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
805: }
806: return $currentstring;
807: }
808:
809: sub end_h4 {
810: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
811: my $currentstring = '';
812: if ($target eq 'web' || $target eq 'webgrade') {
813: $currentstring .= $token->[2];
814: } elsif ($target eq 'tex') {
815: my $post='\vskip 0 mm ';
816: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
817: if ($align eq 'center') {
818: $post='\end{center}';
819: } elsif ($align eq 'left') {
820: $post='} \hfill'.'\vskip 0 mm ';
821: } elsif ($align eq 'right') {
822: $post='}'.'\vskip 0 mm ';
823: }
824: $currentstring .= '}}'.$post;
825: }
826: return $currentstring;
827: }
828:
829: #-- <h5> tag
830: sub start_h5 {
831: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
832: my $currentstring = &end_p(); # Close off any prior paras.
833: if ($target eq 'web' || $target eq 'webgrade') {
834: $currentstring .= $token->[4];
835: } elsif ($target eq 'tex') {
836: my $pre;
837: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
838: if ($align eq 'center') {
839: $pre='\begin{center}';
840: } elsif ($align eq 'left') {
841: $pre='\rlap{';
842: } elsif ($align eq 'right') {
843: $pre=' \hfill \llap{';
844: }
845: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
846: if (not defined $TeXsize) {$TeXsize="large";}
847: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
848: }
849: return $currentstring;
850: }
851:
852: sub end_h5 {
853: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
854: my $currentstring = '';
855: if ($target eq 'web' || $target eq 'webgrade') {
856: $currentstring .= $token->[2];
857: } elsif ($target eq 'tex') {
858: my $post='\vskip 0 mm ';
859: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
860: if ($align eq 'center') {
861: $post='\end{center}';
862: } elsif ($align eq 'left') {
863: $post='} \hfill'.'\vskip 0 mm ';
864: } elsif ($align eq 'right') {
865: $post='}'.'\vskip 0 mm ';
866: }
867: $currentstring .= '}}'.$post;
868: }
869: return $currentstring;
870: }
871:
872: #-- <h6> tag
873: sub start_h6 {
874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
875: my $currentstring = &end_p(); # Close off any prior paras.
876: if ($target eq 'web' || $target eq 'webgrade') {
877: $currentstring .= $token->[4];
878: } elsif ($target eq 'tex') {
879: my $pre;
880: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
881: if ($align eq 'center') {
882: $pre='\begin{center}';
883: } elsif ($align eq 'left') {
884: $pre='\rlap{';
885: } elsif ($align eq 'right') {
886: $pre=' \hfill \llap{';
887: }
888: my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
889: if (not defined $TeXsize) {$TeXsize="large";}
890: $currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
891: }
892: return $currentstring;
893: }
894:
895: sub end_h6 {
896: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
897: my $currentstring = '';
898: if ($target eq 'web' || $target eq 'webgrade') {
899: $currentstring .= $token->[2];
900: } elsif ($target eq 'tex') {
901: my $post='\vskip 0 mm ';
902: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
903: if ($align eq 'center') {
904: $post='\end{center}';
905: } elsif ($align eq 'left') {
906: $post='} \hfill'.'\vskip 0 mm ';
907: } elsif ($align eq 'right') {
908: $post='}'.'\vskip 0 mm ';
909: }
910: $currentstring .= '}}'.$post;
911: }
912: return $currentstring;
913: }
914:
915: #--- <cite> tag (end tag required)
916: sub start_cite {
917: my ($target,$token) = @_;
918: my $currentstring = '';
919: if ($target eq 'web' || $target eq 'webgrade') {
920: $currentstring .= $token->[4];
921: } elsif ($target eq 'tex') {
922: $currentstring .= '\textit{';
923: }
924: return $currentstring;
925: }
926:
927: sub end_cite {
928: my ($target,$token) = @_;
929: my $currentstring = '';
930: if ($target eq 'web' || $target eq 'webgrade') {
931: $currentstring .= $token->[2];
932: } elsif ($target eq 'tex') {
933: $currentstring .= '}';
934: }
935: return $currentstring;
936: }
937:
938: #-- <i> tag (end tag required)
939: sub start_i {
940: my ($target,$token) = @_;
941: my $currentstring = '';
942: if ($target eq 'web' || $target eq 'webgrade') {
943: $currentstring .= $token->[4];
944: } elsif ($target eq 'tex') {
945: $currentstring .= '\textit{';
946: }
947: return $currentstring;
948: }
949:
950: sub end_i {
951: my ($target,$token) = @_;
952: my $currentstring = '';
953: if ($target eq 'web' || $target eq 'webgrade') {
954: $currentstring .= $token->[2];
955: } elsif ($target eq 'tex') {
956: $currentstring .= '}';
957: }
958: return $currentstring;
959: }
960:
961: #-- <address> tag (end tag required)
962: sub start_address {
963: my ($target,$token) = @_;
964: my $currentstring = '';
965: if ($target eq 'web' || $target eq 'webgrade') {
966: $currentstring .= $token->[4];
967: } elsif ($target eq 'tex') {
968: $currentstring .= '\textit{';
969: }
970: return $currentstring;
971: }
972:
973: sub end_address {
974: my ($target,$token) = @_;
975: my $currentstring = '';
976: if ($target eq 'web' || $target eq 'webgrade') {
977: $currentstring .= $token->[2];
978: } elsif ($target eq 'tex') {
979: $currentstring .= '}';
980: }
981: return $currentstring;
982: }
983:
984: #-- <dfn> tag (end tag required)
985: sub start_dfn {
986: my ($target,$token) = @_;
987: my $currentstring = '';
988: if ($target eq 'web' || $target eq 'webgrade') {
989: $currentstring .= $token->[4];
990: } elsif ($target eq 'tex') {
991: $currentstring .= '\textit{';
992: }
993: return $currentstring;
994: }
995:
996: sub end_dfn {
997: my ($target,$token) = @_;
998: my $currentstring = '';
999: if ($target eq 'web' || $target eq 'webgrade') {
1000: $currentstring .= $token->[2];
1001: } elsif ($target eq 'tex') {
1002: $currentstring .= '}';
1003: }
1004: return $currentstring;
1005: }
1006:
1007: #-- <tt> tag (end tag required)
1008: sub start_tt {
1009: my ($target,$token) = @_;
1010: my $currentstring = '';
1011: if ($target eq 'web' || $target eq 'webgrade') {
1012: $currentstring .= $token->[4];
1013: } elsif ($target eq 'tex') {
1014: $currentstring .= '\texttt{';
1015: }
1016: return $currentstring;
1017: }
1018:
1019: sub end_tt {
1020: my ($target,$token) = @_;
1021: my $currentstring = '';
1022: if ($target eq 'web' || $target eq 'webgrade') {
1023: $currentstring .= $token->[2];
1024: } elsif ($target eq 'tex') {
1025: $currentstring .= '}';
1026: }
1027: return $currentstring;
1028: }
1029:
1030: #-- <kbd> tag (end tag required)
1031: sub start_kbd {
1032: my ($target,$token) = @_;
1033: my $currentstring = '';
1034: if ($target eq 'web' || $target eq 'webgrade') {
1035: $currentstring .= $token->[4];
1036: } elsif ($target eq 'tex') {
1037: $currentstring .= '\texttt{';
1038: }
1039: return $currentstring;
1040: }
1041:
1042: sub end_kbd {
1043: my ($target,$token) = @_;
1044: my $currentstring = '';
1045: if ($target eq 'web' || $target eq 'webgrade') {
1046: $currentstring .= $token->[2];
1047: } elsif ($target eq 'tex') {
1048: $currentstring .= '}';
1049: }
1050: return $currentstring;
1051: }
1052:
1053: #-- <code> tag (end tag required)
1054: sub start_code {
1055: my ($target,$token) = @_;
1056: my $currentstring = '';
1057: if ($target eq 'web' || $target eq 'webgrade') {
1058: $currentstring .= $token->[4];
1059: } elsif ($target eq 'tex') {
1060: $currentstring .= '\texttt{';
1061: }
1062: return $currentstring;
1063: }
1064:
1065: sub end_code {
1066: my ($target,$token) = @_;
1067: my $currentstring = '';
1068: if ($target eq 'web' || $target eq 'webgrade') {
1069: $currentstring .= $token->[2];
1070: } elsif ($target eq 'tex') {
1071: $currentstring .= '}';
1072: }
1073: return $currentstring;
1074: }
1075:
1076: #-- <em> tag (end tag required)
1077: sub start_em {
1078: my ($target,$token) = @_;
1079: my $currentstring = '';
1080: if ($target eq 'web' || $target eq 'webgrade') {
1081: $currentstring .= $token->[4];
1082: } elsif ($target eq 'tex') {
1083: $currentstring .= '\emph{';
1084: }
1085: return $currentstring;
1086: }
1087:
1088: sub end_em {
1089: my ($target,$token) = @_;
1090: my $currentstring = '';
1091: if ($target eq 'web' || $target eq 'webgrade') {
1092: $currentstring .= $token->[2];
1093: } elsif ($target eq 'tex') {
1094: $currentstring .= '}';
1095: }
1096: return $currentstring;
1097: }
1098:
1099: #-- <q> tag (end tag required)
1100: sub start_q {
1101: my ($target,$token) = @_;
1102: my $currentstring = '';
1103: if ($target eq 'web' || $target eq 'webgrade') {
1104: $currentstring .= $token->[4];
1105: } elsif ($target eq 'tex') {
1106: $currentstring .= '\emph{';
1107: }
1108: return $currentstring;
1109: }
1110:
1111: sub end_q {
1112: my ($target,$token) = @_;
1113: my $currentstring = '';
1114: if ($target eq 'web' || $target eq 'webgrade') {
1115: $currentstring .= $token->[2];
1116: } elsif ($target eq 'tex') {
1117: $currentstring .= '}';
1118: }
1119: return $currentstring;
1120: }
1121:
1122: # <p> is a bit strange since it does not require a closing </p>
1123: # However in latex, we must often output closing stuff to end
1124: # environments and {}'s etc. Therefore we do all the work
1125: # of figuring out the ending strings in the start tag processing,
1126: # and provide a mechanism to output the stop text external
1127: # to tag processing.
1128: #
1129: {
1130:
1131: my $closing_string = ''; # String required to close <p>
1132:
1133: # Some tags are <p> fragile meaning that <p> inside of them
1134: # does not work within TeX mode. This is managed via the
1135: # counter below:
1136: #
1137:
1138: my $para_disabled = 0;
1139:
1140: sub disable_para {
1141: $para_disabled++;
1142: }
1143: sub enable_para {
1144: $para_disabled--;
1145: }
1146:
1147:
1148: #-- <p> tag (end tag optional)
1149: #optional attribute - align="center|left|right"
1150: sub start_p {
1151: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1152: my $currentstring = '';
1153: if ($target eq 'web' || $target eq 'webgrade') {
1154: $currentstring .= &end_p(); # close off prior para if in progress.
1155: $currentstring .= $token->[4];
1156: if (! ($currentstring =~ /\//)) {
1157: $closing_string = '</p>'; # Deal correctly with <p /> e.g.
1158: }
1159: } elsif ($target eq 'tex' && !$para_disabled) {
1160:
1161: $currentstring .= &end_p(); # close off prior para if in progress.
1162: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1163: if ($align eq 'center') {
1164: $currentstring .='\begin{center}\par ';
1165: $closing_string = '\end{center}';
1166: if (&is_inside_of($tagstack, "table")) {
1167: $currentstring = ¢er_correction().$currentstring;
1168: }
1169: } elsif ($align eq 'right') {
1170: $currentstring.="\n".'{\flushright ';
1171: # $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
1172: $closing_string= "}\n";
1173: } elsif ($align eq 'left') {
1174: $currentstring.= "\n".'{\flushleft ';
1175: # $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
1176: $closing_string = "}\n";
1177: } else {
1178: $currentstring.='\par ';
1179: if (&is_inside_of($tagstack, 'table')) {
1180: $closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
1181: } else {
1182: $closing_string = '\strut\\\\\strut ';
1183: }
1184: }
1185:
1186: }
1187: return $currentstring;
1188: }
1189: #
1190: # End paragraph processing just requires that we output the
1191: # closing string that was saved and blank it.
1192: sub end_p {
1193: # Note only 'tex' mode uses disable_para and enable_para
1194: # so we don't need to know the target in the check below:
1195:
1196: if (!$para_disabled) {
1197: my $current_string = $closing_string;
1198: $closing_string = ''; # Not in a para anymore.
1199: return $current_string;
1200: } else {
1201: return '';
1202: }
1203:
1204: }
1205: }
1206: #-- <br> tag (end tag forbidden)
1207: sub start_br {
1208: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1209: my $currentstring = '';
1210: if ($target eq 'web' || $target eq 'webgrade') {
1211: $currentstring .= $token->[4];
1212: } elsif ($target eq 'tex') {
1213: my @tempo=@$tagstack;
1214: my $signal=0;
1215: # Not going to factor this to is_inside_of since that would require
1216: # multiple stack traversals.
1217: #
1218: for (my $i=$#tempo;$i>=0;$i--) {
1219: if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
1220: ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul')) {
1221: $signal=1;
1222: }
1223: if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
1224: $signal = 1;
1225: }
1226: }
1227: if ($signal eq 1) {
1228: $currentstring .= ' \vskip 0 mm ';
1229: } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
1230: $currentstring .= '\strut \\\\ \strut ';
1231: } else { # Honor break in simple <sup></sup>
1232: $currentstring .= '}} \strut \\\\ \strut \ensuremath{^{';
1233: }
1234: }
1235: return $currentstring;
1236: }
1237:
1238: sub end_br {
1239: my ($target,$token) = @_;
1240: my $currentstring = '';
1241: if ($target eq 'web' || $target eq 'webgrade') {
1242: $currentstring .= $token->[2];
1243: }
1244: return $currentstring;
1245: }
1246:
1247: #-- <big> tag (end tag required)
1248: sub start_big {
1249: my ($target,$token) = @_;
1250: my $currentstring = '';
1251: if ($target eq 'web' || $target eq 'webgrade') {
1252: $currentstring .= $token->[4];
1253: } elsif ($target eq 'tex') {
1254: $currentstring .= '{\large ';
1255: }
1256: return $currentstring;
1257: }
1258:
1259: sub end_big {
1260: my ($target,$token) = @_;
1261: my $currentstring = '';
1262: if ($target eq 'web' || $target eq 'webgrade') {
1263: $currentstring .= $token->[2];
1264: } elsif ($target eq 'tex') {
1265: $currentstring .= '}';
1266: }
1267: return $currentstring;
1268: }
1269:
1270: #-- <small> tag (end tag required)
1271: sub start_small {
1272: my ($target,$token) = @_;
1273: my $currentstring = '';
1274: if ($target eq 'web' || $target eq 'webgrade') {
1275: $currentstring .= $token->[4];
1276: } elsif ($target eq 'tex') {
1277: $currentstring .= '{\footnotesize ';
1278: }
1279: return $currentstring;
1280: }
1281:
1282: sub end_small {
1283: my ($target,$token) = @_;
1284: my $currentstring = '';
1285: if ($target eq 'web' || $target eq 'webgrade') {
1286: $currentstring .= $token->[2];
1287: } elsif ($target eq 'tex') {
1288: $currentstring .= '}';
1289: }
1290: return $currentstring;
1291: }
1292:
1293: #-- <basefont> tag (end tag forbidden)
1294: sub start_basefont {
1295: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1296: my $currentstring = '';
1297: if ($target eq 'web' || $target eq 'webgrade') {
1298: $currentstring = $token->[4];
1299: } elsif ($target eq 'tex') {
1300: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1301: if (defined $basesize) {
1302: $currentstring = '{\\'.$basesize.' ';
1303: }
1304: }
1305: return $currentstring;
1306: }
1307:
1308: sub end_basefont {
1309: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1310: my $currentstring = '';
1311: if ($target eq 'web' || $target eq 'webgrade') {
1312: $currentstring = $token->[4];
1313: } elsif ($target eq 'tex') {
1314: my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1315: if (defined $basesize) {
1316: $currentstring = '}';
1317: }
1318: }
1319: return $currentstring;
1320: }
1321:
1322: #-- <font> tag (end tag required)
1323: sub start_font {
1324: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1325: my $currentstring = '';
1326: if ($target eq 'web' || $target eq 'webgrade') {
1327: my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
1328: if ($face!~/symbol/i) {
1329: if (($env{'browser.fontenhance'} eq 'on') ||
1330: ($env{'browser.blackwhite'} eq 'on')) { return ''; }
1331: }
1332: $currentstring = $token->[4];
1333: } elsif ($target eq 'tex') {
1334: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1335: if (defined $fontsize) {
1336: $currentstring = '{\\'.$fontsize.' ';
1337: }
1338: }
1339: return $currentstring;
1340: }
1341:
1342: sub end_font {
1343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1344: my $currentstring = '';
1345: if ($target eq 'web' || $target eq 'webgrade') {
1346: $currentstring = $token->[2];
1347: } elsif ($target eq 'tex') {
1348: my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
1349: if (defined $fontsize) {
1350: $currentstring = '}';
1351: }
1352: }
1353: return $currentstring;
1354: }
1355:
1356: #-- <strike> tag (end tag required)
1357: sub start_strike {
1358: my ($target,$token) = @_;
1359: my $currentstring = '';
1360: if ($target eq 'web' || $target eq 'webgrade') {
1361: $currentstring .= $token->[4];
1362: } elsif ($target eq 'tex') {
1363: &Apache::lonxml::startredirection();
1364: }
1365: return $currentstring;
1366: }
1367:
1368: sub end_strike {
1369: my ($target,$token) = @_;
1370: my $currentstring = '';
1371: if ($target eq 'web' || $target eq 'webgrade') {
1372: $currentstring .= $token->[2];
1373: } elsif ($target eq 'tex') {
1374: $currentstring=&Apache::lonxml::endredirection();
1375: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1376: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1377: $currentstring=~s/(\S)\s*$/$1\}/;
1378: }
1379: return $currentstring;
1380: }
1381:
1382: #-- <s> tag (end tag required)
1383: sub start_s {
1384: my ($target,$token) = @_;
1385: my $currentstring = '';
1386: if ($target eq 'web' || $target eq 'webgrade') {
1387: $currentstring .= $token->[4];
1388: } elsif ($target eq 'tex') {
1389: &Apache::lonxml::startredirection();
1390: }
1391: return $currentstring;
1392: }
1393:
1394: sub end_s {
1395: my ($target,$token) = @_;
1396: my $currentstring = '';
1397: if ($target eq 'web' || $target eq 'webgrade') {
1398: $currentstring .= $token->[2];
1399: } elsif ($target eq 'tex') {
1400: $currentstring=&Apache::lonxml::endredirection();
1401: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1402: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1403: $currentstring=~s/(\S)\s*$/$1\}/;
1404: }
1405: return $currentstring;
1406: }
1407:
1408: #-- <sub> tag (end tag required)
1409: sub start_sub {
1410: my ($target,$token) = @_;
1411: my $currentstring = '';
1412: if ($target eq 'web' || $target eq 'webgrade') {
1413: $currentstring .= $token->[4];
1414: } elsif ($target eq 'tex') {
1415: $currentstring .= '\ensuremath{_{';
1416: }
1417: return $currentstring;
1418: }
1419:
1420: sub end_sub {
1421: my ($target,$token) = @_;
1422: my $currentstring = '';
1423: if ($target eq 'web' || $target eq 'webgrade') {
1424: $currentstring .= $token->[2];
1425: } elsif ($target eq 'tex') {
1426: $currentstring .= '}}';
1427: }
1428: return $currentstring;
1429: }
1430:
1431: #-- <sup> tag (end tag required)
1432: sub start_sup {
1433: my ($target,$token) = @_;
1434: my $currentstring = '';
1435: if ($target eq 'web' || $target eq 'webgrade') {
1436: $currentstring .= $token->[4];
1437: } elsif ($target eq 'tex') {
1438: $currentstring .= '\ensuremath{^{';
1439: }
1440: return $currentstring;
1441: }
1442:
1443: sub end_sup {
1444: my ($target,$token) = @_;
1445: my $currentstring = '';
1446: if ($target eq 'web' || $target eq 'webgrade') {
1447: $currentstring .= $token->[2];
1448: } elsif ($target eq 'tex') {
1449: $currentstring .= '}}';
1450: }
1451: return $currentstring;
1452: }
1453:
1454: #-- <hr> tag (end tag forbidden)
1455: sub start_hr {
1456: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1457: my $currentstring = &end_p(); # End enclosing para.
1458: if ($target eq 'web' || $target eq 'webgrade') {
1459: $currentstring .= $token->[4];
1460: } elsif ($target eq 'tex') {
1461: my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1462: if (defined $LaTeXwidth) {
1463: if ($LaTeXwidth=~/^%/) {
1464: substr($LaTeXwidth,0,1)='';
1465: $LaTeXwidth=($LaTeXwidth/100).'\textwidth';
1466: }
1467: } else {
1468: $LaTeXwidth ='0.9\textwidth';
1469: }
1470: my ($pre,$post);
1471: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
1472: if (($align eq 'center') || (not defined $align)) {
1473: $pre=''; $post='';
1474: } elsif ($align eq 'left') {
1475: $pre='\rlap{'; $post='} \hfill';
1476: } elsif ($align eq 'right') {
1477: $pre=' \hfill \llap{'; $post='}';
1478: }
1479: $currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
1480: $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
1481: }
1482: return $currentstring;
1483: }
1484:
1485: sub end_hr {
1486: my ($target,$token) = @_;
1487: my $currentstring = '';
1488: if ($target eq 'web' || $target eq 'webgrade') {
1489: $currentstring .= $token->[2];
1490: }
1491: return $currentstring;
1492: }
1493:
1494: #-- <div> tag (end tag required)
1495: {
1496:
1497: # Since div can be nested, the stack below is used
1498: # in 'tex' mode to store the ending strings
1499: # for the div stack.
1500:
1501: my @div_end_stack;
1502:
1503: sub start_div {
1504: my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
1505: my $currentstring = &end_p(); # Close enclosing para.
1506: if ($target eq 'web' || $target eq 'webgrade') {
1507: $currentstring .= $token->[4];
1508: }
1509: if ($target eq 'tex') {
1510: # 4 possible alignments: left, right, center, and -missing-.
1511:
1512: my $endstring = '';
1513:
1514: my $align = lc(&Apache::lonxml::get_param('align', $parstack,
1515: $safeeval, undef, 1));
1516: if ($align eq 'center') {
1517: $currentstring .= '\begin{center}';
1518: $endstring = '\end{center}';
1519: if (&is_inside_of($tagstack, "table")) {
1520: $currentstring = ¢er_correction().$currentstring;
1521: }
1522: }
1523: elsif ($align eq 'right') {
1524: $currentstring .= '\begin{flushright}';
1525: $endstring .= '\end{flushright}';
1526: } elsif ($align eq 'left') {
1527: $currentstring .= '\begin{flushleft}';
1528: $endstring = '\end{flushleft}';
1529: } else {
1530:
1531: }
1532: $currentstring .= "\n"; # For human readability.
1533: $endstring = "\n$endstring\n"; # For human readability
1534: push(@div_end_stack, $endstring);
1535: }
1536: return $currentstring;
1537: }
1538:
1539: sub end_div {
1540: my ($target,$token) = @_;
1541: my $currentstring = '';
1542: if ($target eq 'web' || $target eq 'webgrade') {
1543: $currentstring .= $token->[2];
1544: }
1545: if ($target eq 'tex') {
1546: my $endstring = pop @div_end_stack;
1547: $currentstring .= $endstring;
1548: }
1549: return $currentstring;
1550: }
1551: }
1552:
1553: #-- <a> tag (end tag required)
1554: sub start_a {
1555: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1556: my $currentstring = '';
1557: if ($target eq 'web' || $target eq 'webgrade') {
1558: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
1559: undef,1);
1560: $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
1561: } elsif ($target eq 'tex') {
1562: my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
1563: my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
1564: if ($a=~/\S/) {
1565: $a=~s/([^\\])%/$1\\\%/g;
1566: $currentstring .= '\ref{URI: '.$a.'}';
1567: } elsif ($b=~/\S/) {
1568: $currentstring .= '\ref{Anchor: '.$b.'}';
1569: } else {
1570: $currentstring.='';
1571: }
1572: }
1573: return $currentstring;
1574: }
1575:
1576: sub end_a {
1577: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1578: my $currentstring = '';
1579: if ($target eq 'web' || $target eq 'webgrade') {
1580: $currentstring .= $token->[2];
1581: }
1582: return $currentstring;
1583: }
1584:
1585: #-- <li> tag (end tag optional)
1586: sub start_li {
1587: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1588: my $currentstring = '';
1589: if ($target eq 'web' || $target eq 'webgrade') {
1590: $currentstring = $token->[4];
1591: } elsif ($target eq 'tex') {
1592: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1593: my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
1594: #FIXME need to support types i and I
1595: if ($type=~/disc/) {
1596: $currentstring .= ' \item[$\bullet$] ';
1597: } elsif ($type=~/circle/) {
1598: $currentstring .= ' \item[$\circ$] ';
1599: } elsif ($type=~/square/) {
1600: $currentstring .= ' \item[$\diamond$] ';
1601: } elsif ($type eq '1') {
1602: $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
1603: } elsif ($type eq 'A') {
1604: $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
1605: } elsif ($type eq 'a') {
1606: $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
1607: } elsif ($value ne '') {
1608: $currentstring .= ' \item['.$value.'] ';
1609: } else {
1610: $currentstring .= ' \item ';
1611: }
1612: $Apache::londefdef::list_index++;
1613: }
1614: return $currentstring;
1615: }
1616:
1617: sub end_li {
1618: my ($target,$token) = @_;
1619: my $currentstring = &end_p(); # In case there's a <p> in the <li>
1620: if ($target eq 'web' || $target eq 'webgrade') {
1621: $currentstring .= $token->[2];
1622: }
1623: return $currentstring;
1624: }
1625:
1626: #-- <u> tag (end tag required)
1627: sub start_u {
1628: my ($target,$token) = @_;
1629: my $currentstring = '';
1630: if ($target eq 'web' || $target eq 'webgrade') {
1631: $currentstring .= $token->[4];
1632: } elsif ($target eq 'tex') {
1633: &Apache::lonxml::startredirection();
1634: }
1635: return $currentstring;
1636: }
1637:
1638: sub end_u {
1639: my ($target,$token) = @_;
1640: my $currentstring = '';
1641: if ($target eq 'web' || $target eq 'webgrade') {
1642: $currentstring .= $token->[2];
1643: } elsif ($target eq 'tex') {
1644: $currentstring=&Apache::lonxml::endredirection();
1645: $currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
1646: $currentstring=~s/^\s*(\S)/\\underline\{$1/;
1647: $currentstring=~s/(\S)\s*$/$1\}/;
1648: }
1649: return $currentstring;
1650: }
1651:
1652: #-- <ul> tag (end tag required)
1653: sub start_ul {
1654: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1655: my $currentstring = &end_p(); # Close off enclosing list.
1656: if ($target eq 'web' || $target eq 'webgrade') {
1657: $currentstring .= $token->[4];
1658: } elsif ($target eq 'tex') {
1659: my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1660: $Apache::londefdef::list_index=0;
1661: if ($TeXtype eq 'disc') {
1662: $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
1663: '\renewcommand{\labelitemii}{$\bullet$}'.
1664: '\renewcommand{\labelitemiii}{$\bullet$}'.
1665: '\renewcommand{\labelitemiv}{$\bullet$}';
1666: } elsif ($TeXtype eq 'circle') {
1667: $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
1668: '\renewcommand{\labelitemii}{$\circ$}'.
1669: '\renewcommand{\labelitemiii}{$\circ$}'.
1670: '\renewcommand{\labelitemiv}{$\circ$}';
1671: } elsif ($TeXtype eq 'square') {
1672: $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
1673: '\renewcommand{\labelitemii}{$\diamond$}'.
1674: '\renewcommand{\labelitemiii}{$\diamond$}'.
1675: '\renewcommand{\labelitemiv}{$\diamond$}';
1676: }
1677: $currentstring .= '\strut \begin{itemize}';
1678: }
1679: return $currentstring;
1680: }
1681:
1682: sub end_ul {
1683: my ($target,$token) = @_;
1684: my $currentstring = '';
1685: if ($target eq 'web' || $target eq 'webgrade') {
1686: $currentstring = $token->[2];
1687: } elsif ($target eq 'tex') {
1688: $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
1689: '\renewcommand{\labelitemii}{$\bullet$}'.
1690: '\renewcommand{\labelitemiii}{$\bullet$}'.
1691: '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
1692: }
1693: return $currentstring;
1694: }
1695:
1696: #-- <menu> tag (end tag required)
1697: sub start_menu {
1698: my ($target,$token) = @_;
1699: my $currentstring = '';
1700: if ($target eq 'web' || $target eq 'webgrade') {
1701: $currentstring = $token->[4];
1702: } elsif ($target eq 'tex') {
1703: $currentstring = " \\begin{itemize} ";
1704: }
1705: return $currentstring;
1706: }
1707:
1708: sub end_menu {
1709: my ($target,$token) = @_;
1710: my $currentstring = '';
1711: if ($target eq 'web' || $target eq 'webgrade') {
1712: $currentstring = $token->[2];
1713: } elsif ($target eq 'tex') {
1714: $currentstring = " \\end{itemize}";
1715: }
1716: return $currentstring;
1717: }
1718:
1719: #-- <dir> tag (end tag required)
1720: sub start_dir {
1721: my ($target,$token) = @_;
1722: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1723: if ($target eq 'web' || $target eq 'webgrade') {
1724: $currentstring .= $token->[4];
1725: } elsif ($target eq 'tex') {
1726: $currentstring .= " \\begin{itemize} ";
1727: }
1728: return $currentstring;
1729: }
1730:
1731: sub end_dir {
1732: my ($target,$token) = @_;
1733: my $currentstring = '';
1734: if ($target eq 'web' || $target eq 'webgrade') {
1735: $currentstring = $token->[2];
1736: } elsif ($target eq 'tex') {
1737: $currentstring = " \\end{itemize}";
1738: }
1739: return $currentstring;
1740: }
1741:
1742: #-- <ol> tag (end tag required)
1743: sub start_ol {
1744: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1745: my $currentstring = &end_p(); # In case there's a <p> prior to the list.
1746: if ($target eq 'web' || $target eq 'webgrade') {
1747: $currentstring .= $token->[4];
1748: } elsif ($target eq 'tex') {
1749: $Apache::londefdef::list_index=0;
1750: my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
1751: if ($type eq '1') {
1752: $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1753: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1754: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1755: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
1756: } elsif ($type eq 'A') {
1757: $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
1758: '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
1759: '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
1760: '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
1761: } elsif ($type eq 'a') {
1762: $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
1763: '\renewcommand{\labelenumii}{\alph{enumii}.}'.
1764: '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
1765: '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
1766: } elsif ($type eq 'i') {
1767: $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
1768: '\renewcommand{\labelenumii}{\roman{enumii}.}'.
1769: '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
1770: '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
1771: } elsif ($type eq 'I') {
1772: $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
1773: '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
1774: '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
1775: '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
1776: }
1777: $currentstring .= '\strut \begin{enumerate}';
1778: }
1779: return $currentstring;
1780: }
1781:
1782: sub end_ol {
1783: my ($target,$token) = @_;
1784: my $currentstring = '';
1785: if ($target eq 'web' || $target eq 'webgrade') {
1786: $currentstring = $token->[2];
1787: } elsif ($target eq 'tex') {
1788: $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
1789: '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
1790: '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
1791: '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
1792: }
1793: return $currentstring;
1794: }
1795:
1796: #-- <dl> tag (end tag required)
1797: sub start_dl {
1798: my ($target,$token) = @_;
1799: my $currentstring = &end_p(); # In case there's a <p> unclosed prior to the list.
1800: if ($target eq 'web' || $target eq 'webgrade') {
1801: $currentstring .= $token->[4];
1802: } elsif ($target eq 'tex') {
1803: $currentstring .= '\begin{description}';
1804: $Apache::londefdef::DL++;
1805: push(@Apache::londefdef::description,[]);
1806: $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
1807: $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
1808: $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
1809: }
1810: return $currentstring;
1811: }
1812:
1813: sub end_dl {
1814: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1815: my $currentstring = '';
1816: if ($target eq 'web' || $target eq 'webgrade') {
1817: $currentstring = $token->[2];
1818: } elsif ($target eq 'tex') {
1819: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1820: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1821: foreach my $element (@{$Apache::londefdef::description[-1]}) {
1822: $currentstring.=' '.$element.' ';
1823: }
1824: pop(@Apache::londefdef::description);
1825: $currentstring.='\end{description}';
1826: delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
1827: delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
1828: delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
1829: $Apache::londefdef::DL--;
1830: }
1831: return $currentstring;
1832: }
1833:
1834: #-- <dt> tag (end tag optional)
1835: sub start_dt {
1836: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1837: my $currentstring='';
1838: if ($target eq 'web' || $target eq 'webgrade') {
1839: $currentstring = $token->[4];
1840: } elsif ($target eq 'tex') {
1841: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1842: if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
1843: &Apache::lonxml::startredirection();
1844: $Apache::londefdef::DT[-1]++;
1845: $Apache::londefdef::seenDT[-1]=1;
1846: }
1847: return $currentstring;
1848: }
1849:
1850: sub end_dt {
1851: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1852: my $currentstring = '';
1853: if ($target eq 'web' || $target eq 'webgrade') {
1854: $currentstring = $token->[2];
1855: } elsif ($target eq 'tex') {
1856: if ($Apache::londefdef::DT[-1]) {
1857: my $data=&item_cleanup();
1858: push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
1859: $Apache::londefdef::DT[-1]--;
1860: }
1861: }
1862: return $currentstring;
1863: }
1864:
1865: sub item_cleanup {
1866: my $item=&Apache::lonxml::endredirection();
1867: $item=~s/\\begin{center}//g;
1868: $item=~s/\\end{center}//g;
1869: return $item;
1870: }
1871:
1872: #-- <dd> tag (end tag optional)
1873: sub start_dd {
1874: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1875: my $currentstring = '';
1876: if ($target eq 'web' || $target eq 'webgrade') {
1877: $currentstring = $token->[4];
1878: } elsif ($target eq 'tex') {
1879: if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
1880: if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
1881: if (!$Apache::londefdef::seenDT[-1]) {
1882: push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
1883: }
1884: push(@{$Apache::londefdef::description[-1]},'');
1885: $Apache::londefdef::description[-1]->[-1].=' \strut ';
1886: $Apache::londefdef::DD[-1]++;
1887: &Apache::lonxml::startredirection();
1888: }
1889: return $currentstring;
1890: }
1891:
1892: sub end_dd {
1893: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1894: my $currentstring = '';
1895: if ($target eq 'web' || $target eq 'webgrade') {
1896: $currentstring = $token->[2];
1897: } elsif ($target eq 'tex') {
1898: $Apache::londefdef::description[-1]->[-1].=
1899: &Apache::lonxml::endredirection().' \vskip 0mm ';
1900: $Apache::londefdef::DD[-1]--;
1901: }
1902: return $currentstring;
1903: }
1904:
1905: #-- <table> tag (end tag required)
1906: # <table> also ends any prior <p> that is not closed.
1907: # but, unless I allow <p>'s to nest, that's the
1908: # only way I could think of to allow <p> in
1909: # <tr> <th> bodies
1910: #
1911: #list of supported attributes: border,width,TeXwidth
1912: sub start_table {
1913: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
1914: my $textwidth = '';
1915: my $currentstring = &end_p();
1916: if ($target eq 'web' || $target eq 'webgrade') {
1917: $currentstring .= $token->[4];
1918: } elsif ($target eq 'tex') {
1919: my $aa = {};
1920: push @Apache::londefdef::table, $aa;
1921: $Apache::londefdef::table[-1]{'row_number'} = -1;
1922: #maximum table's width (default coincides with text line length)
1923: if ($#Apache::londefdef::table==0) {
1924: $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
1925: $textwidth=~/(\d+\.?\d*)/;
1926: $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
1927: } else {
1928: if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
1929: #the maximum width of nested table is determined by LATeX width of parent cell
1930: $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}];
1931: } else {
1932: #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
1933: $textwidth=$Apache::londefdef::table[-2]{'width'};
1934: for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
1935: $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
1936: }
1937: }
1938: }
1939:
1940: # width either comes forced from the TeXwidth or the width parameters.
1941: # in either case it can be a percentage or absolute width.
1942: # in the width case we ignore absolute width
1943: my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
1944: if (!defined($TeXwidth)) {
1945: my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
1946: $safeeval,undef,1);
1947: if ($htmlwidth =~ /%/) {
1948: $TeXwidth = $htmlwidth;
1949: } else {
1950: $TeXwidth = $textwidth;
1951: }
1952: } else {
1953: $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
1954: }
1955: if ($TeXwidth=~/%/) {
1956: $Apache::londefdef::table[-1]{'percent'}=1;
1957: $TeXwidth=~/(\d+)/;
1958: $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
1959: } else {
1960: $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
1961: }
1962: # In the end, however the table width cannot be wider than $textwidth...
1963:
1964: if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
1965: $Apache::londefdef::table[-1]{'width'} = $textwidth;
1966: }
1967:
1968: #table's border
1969: my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
1970: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
1971: unless (defined $border) { $border = 0; }
1972: if ($border) {
1973: $Apache::londefdef::table[-1]{'hinc'} = '\hline ';
1974: $Apache::londefdef::table[-1]{'vinc'} = '&';
1975: $Apache::londefdef::table[-1]{'vvinc'} = '|';
1976: } else {
1977: $Apache::londefdef::table[-1]{'hinc'} = '';
1978: $Apache::londefdef::table[-1]{'vinc'} = '&';
1979: $Apache::londefdef::table[-1]{'vvinc'} = '';
1980: }
1981: if ($#Apache::londefdef::table==0) {
1982: # Note that \newline seems to destroy the alignment envs.
1983: # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
1984: $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
1985: }
1986: $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
1987: $Apache::londefdef::table[-1]{'TeXlen'}=[];
1988: $Apache::londefdef::table[-1]{'objectlen'}=[];
1989: $Apache::londefdef::table[-1]{'objectsignal'}=[];
1990: $Apache::londefdef::table[-1]{'maxlen'}=[];
1991: $Apache::londefdef::table[-1]{'minlen'}=[];
1992: $Apache::londefdef::table[-1]{'content'}=[];
1993: $Apache::londefdef::table[-1]{'align'}=[];
1994: if (&is_inside_of($tagstack, 'sup')) {
1995: $currentstring .= '}} \\\\ \ensuremath{^{ ';
1996: }
1997: if (&is_inside_of($tagstack, 'sub')) {
1998: $currentstring .= '}} \\\\ \ensuremath{_{ ';
1999: }
2000: $currentstring.=' \keephidden{NEW TABLE ENTRY}';
2001:
2002:
2003: }
2004: return $currentstring;
2005: }
2006:
2007: sub end_table {
2008: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2009: my $currentstring = '';
2010: if ($target eq 'web' || $target eq 'webgrade') {
2011: $currentstring = $token->[2];
2012: } elsif ($target eq 'tex') {
2013: my $inmemory = '';
2014: my $output = '';
2015: my $WARNING='';
2016: #width of columns from TeXwidth attributes
2017:
2018: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2019: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2020: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
2021: $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
2022: }
2023: }
2024: }
2025: #free space and number of empty columns
2026: my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
2027: if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;}
2028: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2029: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
2030: $empty_columns++;
2031: } else {
2032: $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
2033: }
2034: }
2035: #boundaries for contents columns
2036: my @min_len=();#columns can not be narrower
2037: my @max_len=();#maximum length of column
2038: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2039: my ($localmin,$localmax)=(0,0);
2040: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2041: if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
2042: $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
2043: }
2044: if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
2045: $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
2046: }
2047: }
2048: push @min_len, $localmin;
2049: push @max_len, $localmax;
2050: }
2051: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2052: my $localmin=0,;
2053: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2054: if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
2055: $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
2056: }
2057: }
2058: if ($max_len[$jn]<$localmin) {
2059: $max_len[$jn]=$localmin;
2060: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2061: }#object size is bigger
2062: if ($min_len[$jn]<$localmin) {
2063: $min_len[$jn]=$localmin;
2064: $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
2065: }#object size is bigger
2066: if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
2067: $min_len[$jn]=0;
2068: $max_len[$jn]=0;
2069: }
2070: }
2071: #final adjustment of column width
2072: my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
2073: my @adjust=();
2074: #step 1. adjustment by maximum value
2075: my $space_neeeded=0;
2076: for (my $jn=0;$jn<=$#max_len;$jn++) {
2077: $space_neeeded=$space_neeeded+$max_len[$jn];
2078: }
2079: if ($space_neeeded<=$available_space) {
2080: for (my $jn=0;$jn<=$#max_len;$jn++) {
2081: if ($fwidth[$jn]==0) {
2082: $fwidth[$jn]=$max_len[$jn];
2083: }
2084: }
2085: } else {
2086: #step 2. adjustment by minimum value (estimation)
2087: $space_neeeded=0;
2088: for (my $jn=0;$jn<=$#min_len;$jn++) {
2089: $space_neeeded+=$min_len[$jn];
2090: }
2091: if ($space_neeeded>$available_space) {
2092: $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
2093: for (my $jn=0;$jn<=$#max_len;$jn++) {
2094: if ($fwidth[$jn]==0) {
2095: $fwidth[$jn]=$min_len[$jn];
2096: }
2097: }
2098: #check if we have objects which can be scaled
2099: my $how_many_to_scale=0;
2100: my @to_scale=();
2101: for (my $jn=0;$jn<=$#max_len;$jn++) {
2102: if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
2103: $how_many_to_scale++;
2104: push @to_scale, $jn;
2105: }
2106: }
2107: if ($how_many_to_scale>0) {
2108: my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
2109: foreach my $jn (@to_scale) {
2110: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2111: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
2112: if ($1 ne '') {
2113: my $current_length=&recalc($1);
2114: $current_length=~/(\d+\.?\d*)/;
2115: $current_length=$current_length-$space_to_adjust;
2116: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
2117: }
2118: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
2119: if ($1 ne '') {
2120: my $current_length=$1;
2121: $current_length=$current_length-$space_to_adjust;
2122: $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
2123: }
2124: }
2125: $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
2126: }
2127: }
2128: } else {
2129: #step 3. adjustment over minimal + corrections
2130: my $enlarge_coef=$available_space/$space_neeeded;
2131: my $acsessive=0;
2132: for (my $jn=0;$jn<=$#min_len;$jn++) {
2133: $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
2134: if ($adjust[$jn]>$max_len[$jn]) {
2135: $fwidth[$jn]=$max_len[$jn];
2136: $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
2137: $adjust[$jn]=0;
2138: }
2139: }
2140: if ($acsessive>0) {
2141: #we have an excess of space and can redistribute it
2142: my $notempty_columns=0;
2143: for (my $jn=0;$jn<=$#min_len;$jn++) {
2144: if ($adjust[$jn]!=0) {
2145: $notempty_columns++;
2146: }
2147: }
2148: my $per_column=$acsessive/$notempty_columns;
2149: for (my $jn=0;$jn<=$#min_len;$jn++) {
2150: if ($adjust[$jn]!=0) {
2151: $adjust[$jn]+=$per_column;
2152: $fwidth[$jn]=$adjust[$jn];
2153: }
2154: }
2155: } else {
2156: for (my $jn=0;$jn<=$#min_len;$jn++) {
2157: $fwidth[$jn]=$adjust[$jn];
2158: }
2159: }
2160: }
2161: }
2162: #use all available width if it is defined in % or as TeXwidth
2163: if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
2164: my $current=0;
2165: for (my $i=0;$i<=$#fwidth;$i++) {
2166: $current+=$fwidth[$i];
2167: }
2168: my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
2169: for (my $i=0;$i<=$#fwidth;$i++) {
2170: $fwidth[$i]*=$coef;
2171: }
2172: }
2173: #removing of empty columns if allowed
2174: my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
2175: if ($permission eq 'yes') {
2176: my @cleaned_table=();
2177: my @cleaned_header=();
2178: my $colind=0;
2179: for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
2180: if ($fwidth[$jn]!=0) {
2181: #we need to copy column
2182: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2183: $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2184: $cleaned_header[$colind]=$fwidth[$jn];
2185: }
2186: $colind++;
2187: }
2188: }
2189: $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
2190: @fwidth=@cleaned_header;
2191: }
2192: #construct header of the table
2193: my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
2194: for (my $in=0;$in<=$#fwidth;$in++) {
2195: $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
2196: }
2197: $header_of_table .= '}';
2198: #fill the table
2199: for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
2200: my $have_rowspan = 0;
2201: for (my $jn=0;$jn<=$#fwidth;$jn++) {
2202:
2203: #-----------------------------------------------------------
2204: # I think this order of doing things will ensure that
2205: # single rowspan, columspan and combined row/colspans will
2206: # work correctly. LaTeX is delicate here.
2207: # RF.
2208:
2209: # Start a rowspan if necessary:
2210:
2211: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2212: my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
2213: #
2214: # Do the appropriate magic if this has a colspan
2215: #
2216:
2217: if ($colspan > 1) {
2218: my $spanwidth = 0;
2219: for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
2220: $spanwidth += $fwidth[$spancol];
2221: }
2222: $output .= '\multicolumn{'.
2223: $colspan
2224: ."}";
2225: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2226: $output .= '{|c|}{';
2227: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2228: $output .= '{|r|}{';
2229: }
2230: else {
2231: $output .= "{|p{$spanwidth mm}|}{";
2232: }
2233:
2234: }
2235:
2236: # Rowspan... if colspan is 1, and there's an alignment we'll need
2237: # to kick in a multicolumn in order to get the alignment spec.
2238: # this must precede the multirow or LaTex gets quite upset.
2239: # Naturally if colspan > 1 we've already done that above ^
2240: #
2241: my $multirow_aligned = 0;
2242: if ($rowspan > 1) {
2243: if ($colspan == 1) {
2244: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2245: $output .= '\multicolumn{1}{|c|}{';
2246: $multirow_aligned = 1;
2247: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2248: $output .= '\multicolumn{1}{|r|}{';
2249: $multirow_aligned = 1;
2250: }
2251: }
2252: $have_rowspan++;
2253: $output .= '\multirow{'.$rowspan.'}[0]{*}{';
2254: #
2255: # If we did not throw in a multicolumn to align, then add
2256: # an extra {
2257: # so we close correctly without having to keep additional state
2258: # around
2259: #
2260: if (!$multirow_aligned) {
2261: $output .= '{';
2262: }
2263: }
2264: if (($rowspan eq '^') || ($rowspan eq '_')) {
2265: $have_rowspan++;
2266: }
2267: #--------------------------------------------------------------
2268:
2269:
2270: # For right and center alignment of single cells.
2271: # we are going to use a multicolumn with a span of 1 to specify alignment.
2272: #
2273: if ($colspan == 1 && $rowspan == 1) {
2274: if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
2275: $output .= '\multicolumn{1}{|c|}{';
2276: } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
2277: $output .= '\multicolumn{1}{|r|}{';
2278: }
2279: }
2280:
2281: $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
2282:
2283: if (($colspan == 1 && $rowspan == 1) &&
2284: (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
2285: ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
2286: $output .= '}';
2287: }
2288:
2289: # Close off any open multirow:
2290:
2291: if ($rowspan > 1) {
2292: $output .= '}}';
2293: }
2294: # Close off the colspan...
2295: #
2296: if ($colspan > 1) {
2297: $output .= '}';
2298: $jn += $colspan-1; # Adjust for number of rows really left.
2299: }
2300: if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
2301: }
2302: # If have_rowspan > 0, and borders are on, then
2303: # we need to do more than put an \hline at the bottom of row.
2304: # we need to do the appropriate \cline to ensure that
2305: # the spanned rows don't have \hlines through them.
2306:
2307: if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
2308: $output .= ' \\\\ ';
2309: for (my $jn=0; $jn<=$#fwidth;$jn++) {
2310: my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
2311: if ($rowspan ne "^") {
2312: if (($rowspan <= 1) || ($rowspan eq '_')) {
2313: my $column = $jn+1;
2314: $output .= '\cline{'.$column.'-'.$column.'} ';
2315: }
2316: }
2317: }
2318:
2319: } else {
2320: $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
2321: }
2322: }
2323: # Note that \newline destroys alignment env's produced by e.g. <div>
2324: # $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
2325: $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
2326: if ($#Apache::londefdef::table > 0) {
2327: my $inmemory = $Apache::londefdef::table[-1]{'output'};
2328: # Figure out max/and min width by summing us and then
2329: # apply that to the current column of the table we nest in
2330: # if it's larger than the current width or the current width
2331: # is undefined.
2332: #
2333: my $min_nested_width = 0;
2334: my $max_nested_width = 0;
2335: for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
2336: $min_nested_width += $min_len[$col];
2337: $max_nested_width += $max_len[$col];
2338:
2339: }
2340: # Fudge in an extra 5 mm for borders etc:
2341:
2342: $min_nested_width += 5;
2343: $max_nested_width += 5;
2344:
2345: my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
2346: my $outer_row = $Apache::londefdef::table[-2]{'row_number'};
2347: if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
2348: $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
2349: }
2350: if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
2351: $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
2352: }
2353:
2354: pop @Apache::londefdef::table;
2355: push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
2356: } else {
2357: $currentstring .= $Apache::londefdef::table[-1]{'output'};
2358: pop @Apache::londefdef::table;
2359: undef @Apache::londefdef::table;
2360: }
2361: }
2362: return $currentstring;
2363: }
2364:
2365: #-- <tr> tag (end tag optional)
2366: sub start_tr {
2367: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2368: my $currentstring = '';
2369: if ($target eq 'web' || $target eq 'webgrade') {
2370: $currentstring = $token->[4];
2371: } elsif ($target eq 'tex') {
2372: $Apache::londefdef::table[-1]{'row_number'}++;
2373: my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
2374: if ($alignchar ne '') {
2375: push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
2376: } else {
2377: push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
2378: }
2379: push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
2380: #
2381: # Need to save the number of table columns to preserve the max # columns.
2382: #
2383: $Apache::londefdef::table[-1]{'prior_columns'} = $Apache::londefdef::table[-1]{'counter_columns'};
2384: $Apache::londefdef::table[-1]{'counter_columns'} = -1;
2385: push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
2386: push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
2387: push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
2388: push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
2389: push @ {$Apache::londefdef::table[-1]{'content'}}, [];
2390: }
2391: return $currentstring;
2392: }
2393:
2394: sub end_tr {
2395: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2396: my $currentstring = &end_p(); # Close any pending <p> in the row.
2397: if ($target eq 'web' || $target eq 'webgrade') {
2398: $currentstring .= $token->[2];
2399: } elsif ($target eq 'tex') {
2400: if ($Apache::londefdef::TD_redirection) {
2401: &end_td_tex($parstack,$parser,$safeeval);
2402: }
2403: # Counter columns must be the maximum number of columns seen
2404: # in the table so far so:
2405: if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
2406: $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
2407: }
2408:
2409:
2410:
2411: }
2412: return $currentstring;
2413: }
2414:
2415: #-- <td> tag (end tag optional)
2416: sub start_td {
2417: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2418: my $currentstring = '';
2419: if ($target eq 'web' || $target eq 'webgrade') {
2420: $currentstring = $token->[4];
2421: } elsif ($target eq 'tex') {
2422: $Apache::londefdef::TD_redirection = 1;
2423: &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
2424: }
2425: return $currentstring;
2426: }
2427:
2428: sub tag_check {
2429: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2430: my @ar=@$parstack;
2431: for (my $i=$#ar-1;$i>=0;$i--) {
2432: if (lc($$tagstack[$i]) eq $good_tag) {
2433: &start_td_tex($parstack,$parser,$safeeval);
2434: last;
2435: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2436: splice @ar, $i+1;
2437: &end_td_tex(\@ar,$parser,$safeeval);
2438: &start_td_tex($parstack,$parser,$safeeval);
2439: last;
2440: }
2441: }
2442: return '';
2443: }
2444:
2445: sub start_td_tex {
2446: my ($parstack,$parser,$safeeval) = @_;
2447: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2448: if ($alignchar eq '') {
2449: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2450: }
2451: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2452: $Apache::londefdef::table[-1]{'counter_columns'}++;
2453: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2454: if (defined $TeXwidth) {
2455: my $current_length=&recalc($TeXwidth);
2456: $current_length=~/(\d+\.?\d*)/;
2457: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2458: }
2459: &Apache::lonxml::startredirection();
2460: return '';
2461: }
2462:
2463: sub end_td_tex {
2464: my ($parstack,$parser,$safeeval) = @_;
2465: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2466: my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
2467: my $data = &Apache::lonxml::endredirection();
2468:
2469: # The rowspan array of the table indicates which cells are part of a span.
2470: # n indicates the start of a span set of n rows.
2471: # ^ indicates a cell that continues a span set.
2472: # _ indicates the cell is at the bottom of a span set.
2473: # If this and subsequent cells are part of a rowspan, we must
2474: # push along the row until we find one that is not.
2475:
2476: while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
2477: && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
2478: # Part of a span.
2479: push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
2480: $current_column++;
2481: }
2482: $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
2483:
2484:
2485: # Get the column and row spans.
2486: # Colspan can be done via \multicolumn if I can figure out the data structs.
2487:
2488: my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
2489: if (!$colspan) {
2490: $colspan = 1;
2491: }
2492:
2493: my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
2494: if (!$rowspan) {
2495: $rowspan = 1;
2496: }
2497:
2498:
2499:
2500: for (my $c = 0; $c < $colspan; $c++) {
2501: $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
2502: for (my $i = 1; $i < $rowspan; $i++) {
2503: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
2504: if ($i == ($rowspan-1)) {
2505: $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
2506: }
2507: }
2508: }
2509:
2510: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2511: if (defined $TeXwidth) {
2512: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2513: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2514: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2515: } else {
2516: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2517: my $garbage_data=$data;
2518: my $fwidth=0;
2519: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2520: my $current_length=&recalc($1);
2521: $current_length=~/(\d+\.?\d*)/;
2522: if ($fwidth<$1) {$fwidth=$1;}
2523: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2524: }
2525: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2526: my $current_length=$1;
2527: if ($fwidth<$current_length) {$fwidth=$current_length;}
2528: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2529: }
2530: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2531: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2532: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2533: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2534: } elsif ($data=~/\\parbox\{\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*\s*\}/ or $data=~/\\epsfxsize\s*=\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*/) {
2535: my $garbage_data=$data;
2536: my $fwidth=0;
2537: while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
2538: my $current_length=&recalc($1);
2539: $current_length=~/(\d+\.?\d*)/;
2540: if ($fwidth<$1) {$fwidth=$1;}
2541: $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2542: }
2543: while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2544: my $current_length=&recalc($1);
2545: $current_length=~/(\d+\.?\d*)/;
2546: if ($fwidth<$1) {$fwidth=$1;}
2547: $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2548: }
2549: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2550: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2551: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2552: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2553: $data=~s/\\\\\s*$//;
2554: } else {
2555: $data=~s/^\s+(\S.*)/$1/;
2556: $data=~s/(.*\S)\s+$/$1/;
2557: $data=~s/(\s)+/$1/;
2558: my ($current_length,$min_length)=(0,0);
2559: if ($data=~/\\vskip/) {
2560: my $newdata=$data;
2561: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2562: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2563: foreach my $elementdata (@newdata) {
2564: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2565: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2566: my @words=split(/ /,$elementdata);
2567: foreach my $word (@words) {
2568: my $lengthword=2.5*&LATEX_length($word);
2569: if ($min_length<$lengthword) {$min_length=$lengthword;}
2570: }
2571: }
2572: } else {
2573: $current_length=2.5*&LATEX_length($data);
2574: my @words=split(/ /,$data);
2575: foreach my $word (@words) {
2576: my $lengthword=2*&LATEX_length($word);
2577: if ($min_length<$lengthword) {$min_length=$lengthword;}
2578: }
2579: }
2580: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2581: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2582: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2583: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2584: }
2585: }
2586: # Substitute all of the tables nested in this cell in their appropriate places.
2587:
2588:
2589: my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
2590: for (my $in=0; $in<=$nested_count; $in++) {
2591: my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
2592: $nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
2593: # $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2594: $data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
2595:
2596: }
2597: # Should be be killing off the 'include' elements as they're used up?
2598:
2599: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2600:
2601:
2602:
2603:
2604: # the colspan array will indicate how many columns will be spanned by this
2605: # cell..this requires that counter_columns also be adjusted accordingly
2606: # so that the next bunch of text goes in the right cell. Note that since
2607: # counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
2608: #
2609:
2610: $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
2611: for (my $i = 0; $i < ($colspan -1); $i++) {
2612: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
2613: }
2614: for (my $r = 0; $r < $rowspan; $r++) {
2615: $Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
2616: # Put empty text in spanned cols.
2617:
2618: }
2619:
2620:
2621:
2622: return '';
2623: }
2624:
2625: sub end_td {
2626: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2627: my $currentstring = '';
2628: if ($target eq 'web' || $target eq 'webgrade') {
2629: $currentstring = $token->[2];
2630: } elsif ($target eq 'tex') {
2631: $Apache::londefdef::TD_redirection =0;
2632: &end_td_tex($parstack,$parser,$safeeval);
2633: }
2634: return $currentstring;
2635: }
2636:
2637: #-- <th> tag (end tag optional)
2638: sub start_th {
2639: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2640: my $currentstring = '';
2641: if ($target eq 'web' || $target eq 'webgrade') {
2642: $currentstring = $token->[4];
2643: } elsif ($target eq 'tex') {
2644: $Apache::londefdef::TD_redirection = 1;
2645: &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
2646: }
2647: return $currentstring;
2648: }
2649:
2650: sub tagg_check {
2651: my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
2652: my @ar=@$parstack;
2653: for (my $i=$#ar-1;$i>=0;$i--) {
2654: if (lc($$tagstack[$i]) eq $good_tag) {
2655: &start_th_tex($parstack,$parser,$safeeval);
2656: last;
2657: } elsif (lc($$tagstack[$i]) eq $bad_tag) {
2658: splice @ar, $i+1;
2659: &end_th_tex(\@ar,$parser,$safeeval);
2660: &start_th_tex($parstack,$parser,$safeeval);
2661: last;
2662: }
2663: }
2664: return '';
2665: }
2666:
2667: sub start_th_tex {
2668: my ($parstack,$parser,$safeeval) = @_;
2669: my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
2670: if ($alignchar eq '') {
2671: $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
2672: }
2673: push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
2674: $Apache::londefdef::table[-1]{'counter_columns'}++;
2675: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2676: if (defined $TeXwidth) {
2677: my $current_length=&recalc($TeXwidth);
2678: $current_length=~/(\d+\.?\d*)/;
2679: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
2680: }
2681: &Apache::lonxml::startredirection();
2682: return '';
2683: }
2684:
2685: sub end_th_tex {
2686: my ($parstack,$parser,$safeeval) = @_;
2687: my $current_row = $Apache::londefdef::table[-1]{'row_number'};
2688: my $data=&Apache::lonxml::endredirection();
2689: my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
2690: if (defined $TeXwidth) {
2691: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2692: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2693: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2694: } else {
2695: if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
2696: my $garbage_data=$data;
2697: my $fwidth=0;
2698: while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
2699: my $current_length=&recalc($1);
2700: $current_length=~/(\d+\.?\d*)/;
2701: if ($fwidth<$1) {$fwidth=$1;}
2702: $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
2703: }
2704: while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
2705: my $current_length=$1;
2706: if ($fwidth<$current_length) {$fwidth=$current_length;}
2707: $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
2708: }
2709: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2710: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
2711: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2712: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2713: } else {
2714: $data=~s/^\s+(\S.*)/$1/;
2715: $data=~s/(.*\S)\s+$/$1/;
2716: $data=~s/(\s)+/$1/;
2717: my ($current_length,$min_length)=(0,0);
2718: if ($data=~/\\vskip/) {
2719: my $newdata=$data;
2720: $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
2721: my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
2722: foreach my $elementdata (@newdata) {
2723: my $lengthnewdata=2.5*&LATEX_length($elementdata);
2724: if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
2725: my @words=split(/ /,$elementdata);
2726: foreach my $word (@words) {
2727: my $lengthword=2.5*&LATEX_length($word);
2728: if ($min_length<$lengthword) {$min_length=$lengthword;}
2729: }
2730: }
2731: } else {
2732: $current_length=2.5*&LATEX_length($data);
2733: my @words=split(/ /,$data);
2734: foreach my $word (@words) {
2735: my $lengthword=2*&LATEX_length($word);
2736: if ($min_length<$lengthword) {$min_length=$lengthword;}
2737: }
2738: }
2739: push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2740: push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
2741: push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
2742: push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
2743: }
2744: }
2745: for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {
2746: $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
2747: }
2748: #make data bold
2749: $data='\textbf{'.$data.'}';
2750: push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
2751: return'';
2752: }
2753:
2754: sub end_th {
2755: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
2756: my $currentstring = &end_p(); # Close any open <p> in the row.
2757: if ($target eq 'web' || $target eq 'webgrade') {
2758: $currentstring .= $token->[2];
2759: } elsif ($target eq 'tex') {
2760: $Apache::londefdef::TD_redirection =0;
2761: &end_th_tex($parstack,$parser,$safeeval);
2762: }
2763: return $currentstring;
2764: }
2765:
2766: #-- <img> tag (end tag forbidden)
2767: #
2768: # Render the <IMG> tag.
2769: # <IMG> has the following attributes (in addition to the
2770: # standard HTML ones:
2771: # TeXwrap - Governs how the tex target will try to wrap text around
2772: # horizontally aligned images.
2773: # TeXwidth - The width of the image when rendered for print (mm).
2774: # TeXheight - The height of the image when rendered for print (mm)
2775: # (Note there seems to also be support for this as a % of page size)
2776: #
2777: sub start_img {
2778: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
2779: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
2780: undef,1);
2781: if (! $src &&
2782: ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
2783: ) {
2784: my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
2785: return '';
2786: }
2787: &Apache::lonxml::extlink($src);
2788: my $currentstring = '';
2789: my $scaling = .3;
2790:
2791: # Render unto browsers that which are the browser's...
2792:
2793: if ($target eq 'web' || $target eq 'webgrade') {
2794: if ($env{'browser.imagesuppress'} ne 'on') {
2795: my $enc = ('yes' eq
2796: lc(&Apache::lonxml::get_param('encrypturl',$parstack,
2797: $safeeval)));
2798: $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
2799: $enc);
2800: } else {
2801: my $alttag = &Apache::lonxml::get_param('alt',$parstack,$safeeval,
2802: undef,1);
2803: if (!$alttag) {
2804: $alttag = &Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
2805: $src);
2806: }
2807: $currentstring.='[IMAGE: '.$alttag.']';
2808: }
2809:
2810: # and render unto TeX that which is LaTeX
2811:
2812: } elsif ($target eq 'tex') {
2813: #
2814: # The alignment will require some superstructure to be put around
2815: # the \includegraphics stuff. At present we can only partially
2816: # simulate the alignments offered by html.
2817: #
2818: #
2819: my $align = lc(&Apache::lonxml::get_param('align',
2820: $parstack,
2821: $safeeval,
2822: undef,1));
2823: if(!$align) {
2824: $align = "bottom"; # This is html's default so it's ours too.
2825: }
2826: #
2827: &Apache::lonxml::debug("Alignemnt = $align");
2828: # LaTeX's image/text wrapping is really bad since it wants to
2829: # make figures float.
2830: # The user has the optional parameter (applicable only to l/r
2831: # alignment to use the picins/parpic directive to get wrapped text
2832: # this is also imperfect.. that's why we give them a choice...
2833: # so they can't yell at us for our choice.
2834: #
2835: my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
2836: $parstack,
2837: $safeeval,
2838: undef,0);
2839: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
2840: if(!$latex_rendering) {
2841: $latex_rendering = "texwrap";
2842: }
2843: # using texwrap inside a table does not work. So, if after all of this,
2844: # texwrap is on, we turn it off if we detect we're in a table:
2845: #
2846: if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
2847: $latex_rendering = 'parpic';
2848: }
2849:
2850: # &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
2851:
2852: #if original gif/jpg/png file exist do following:
2853: my $origsrc=$src;
2854: my ($path,$file) = &get_eps_image($src);
2855: # &Apache::lonnet::logthis("Image source: $src result: $path $file");
2856: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
2857: &Apache::lonxml::debug("path = $path file = $file src = $src");
2858: if (-e $src) {
2859: &Apache::lonxml::debug("$src exists");
2860: my ($height_param,$width_param)=
2861: &image_size($origsrc,0.3,$parstack,$safeeval);
2862: my $destpath = $path;
2863: $destpath =~ s/ /\_/g; # Spaces in path cause LaTex to vomit.
2864: my $destfile = $file;
2865: $destfile =~ s/ /\_/g;
2866: my $size;
2867: if ($width_param) { $size.='width='.$width_param.' mm,'; }
2868: if ($height_param) { $size.='height='.$height_param.' mm]'; }
2869: # Default size if not able to extract that (e.g. eps image).
2870:
2871: # &Apache::lonnet::logthis("Size = $size");
2872: if ($size eq "0 mm") {
2873: $size = "50 mm]"; # Default to 1 column width for 2 column.
2874: }
2875:
2876: $size='['.$size;
2877: $size=~s/,$/]/;
2878: $currentstring .= '\graphicspath{{'.$destpath.'}}'
2879: .'\includegraphics'.$size.'{'.$destfile.'} ';
2880:
2881: # If there's an alignment specification we need to honor it here.
2882: # For the horizontal alignments, we will also honor the
2883: # value of the latex specfication. The default is parbox,
2884: # and that's used for illegal values too.
2885: #
2886: # Even though we set a default alignment value, the user
2887: # could have given us an illegal value. In that case we
2888: # just use the default alignment of bottom..
2889: if ($align eq "top") {
2890: $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
2891: } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
2892: my $offset = $height_param/2;
2893: $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
2894: } elsif ($align eq "left") {
2895: if ($latex_rendering eq "parpic") {
2896: $currentstring = '\parpic[l]{'.$currentstring.'}';
2897: } else { # wrapfig render
2898: $currentstring = '\begin{wrapfigure}{l}{'.$width_param.'mm}'
2899: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2900: }
2901: } elsif ($align eq "right") {
2902: if ($latex_rendering eq "parpic") {
2903: $currentstring = '\parpic[r]{'.$currentstring.'}';
2904: } else { # wrapfig rendering
2905: $currentstring = '\begin{wrapfigure}{r}{'.$width_param.'mm}'
2906: .'\scalebox{1.0}{'.$currentstring.'}\end{wrapfigure}';
2907:
2908: }
2909: } else { # Bottom is also default.
2910: # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
2911: }
2912: } else {
2913: &Apache::lonxml::debug("$src does not exist");
2914: #original image file doesn't exist so check the alt attribute
2915: my $alt =
2916: &Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
2917: unless ($alt) {
2918: $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
2919: }
2920:
2921: if ($alt) { $currentstring .= ' '.$alt.' '; }
2922: }
2923:
2924: # And here's where the semi-quote breaks down: allow the user
2925: # to edit the beast as well by rendering the problem for edit:
2926: } elsif ($target eq 'edit') {
2927: $currentstring .=&Apache::edit::tag_start($target,$token);
2928: $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
2929: &Apache::edit::browse('src',undef,'alt').' '.
2930: &Apache::edit::search('src',undef,'alt').'<br />';
2931: $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
2932: $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
2933: $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
2934: $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
2935: $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
2936: $currentstring .=&Apache::edit::select_arg('Alignment:','align',
2937: ['','bottom','middle','top','left','right'],$token,5);
2938: $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
2939: ['', 'parbox', 'parpic'], $token, 2);
2940: $currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
2941: ['no','yes'], $token, 2);
2942: $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
2943: my $src= &Apache::lonxml::get_param('src',$parstack,$safeeval);
2944: my $alt= &Apache::lonxml::get_param('alt',$parstack,$safeeval);
2945: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
2946: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
2947:
2948:
2949: $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
2950: if ($width) { $currentstring.=' width="'.$width.'" '; }
2951: if ($height) { $currentstring.=' height="'.$height.'" '; }
2952: $currentstring .= ' />';
2953: } elsif ($target eq 'modified') {
2954: my ($osrc,$owidth,$oheight)=
2955: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2956: my $ctag=&Apache::edit::get_new_args($token,$parstack,
2957: $safeeval,'src','alt','align',
2958: 'TeXwidth','TeXheight', 'TeXwrap',
2959: 'width','height','encrypturl');
2960: my ($nsrc,$nwidth,$nheight)=
2961: ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
2962: my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
2963: &image_replication($loc);
2964: my ($iwidth,$iheight);
2965: if (-e $loc) {
2966: my $image = Image::Magick->new;
2967: $image->Read($loc);
2968: ($iwidth, $iheight) = ($image->Get('width'),
2969: $image->Get('height'));
2970: }
2971: if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
2972: # changed image or no size specified,
2973: # if they didn't explicitly change the
2974: # width or height use the ones from the image
2975: if ($iwidth && $iheight) {
2976: if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
2977: $token->[2]{'width'} = $iwidth;$ctag=1;
2978: }
2979: if ($oheight == $nheight || (!$nwidth && !$nheight)) {
2980: $token->[2]{'height'}=$iheight;$ctag=1;
2981: }
2982: }
2983: }
2984: my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
2985: # if we don't have a width or height
2986: if ($iwidth && $cwidth && !$cheight) {
2987: $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
2988: }
2989: if ($iheight && $cheight && !$cwidth) {
2990: $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
2991: }
2992: if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
2993: }
2994:
2995: return $currentstring;
2996: }
2997:
2998: sub end_img {
2999: my ($target,$token) = @_;
3000: my $currentstring = '';
3001: if ($target eq 'web' || $target eq 'webgrade') {
3002: $currentstring = $token->[2];
3003: } elsif ($target eq 'tex') {
3004: $currentstring = '';
3005: }
3006: return $currentstring;
3007: }
3008:
3009: #-- <applet> tag (end tag required)
3010: sub start_applet {
3011: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3012:
3013: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
3014: &Apache::lonxml::extlink($code);
3015: my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
3016: undef,1);
3017: &Apache::lonxml::extlink($archive);
3018: my $currentstring = '';
3019: if ($target eq 'web' || $target eq 'webgrade') {
3020: if ($env{'browser.appletsuppress'} ne 'on') {
3021: $currentstring = &Apache::lonenc::encrypt_ref($token,
3022: {'code'=>$code,
3023: 'archive'=>$archive}
3024: );
3025: } else {
3026: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3027: $safeeval,undef,1);
3028: unless ($alttag) {
3029: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3030: $code);
3031: }
3032: $currentstring='[APPLET: '.$alttag.']';
3033: }
3034: } elsif ($target eq 'tex') {
3035: my $alttag= &Apache::lonxml::get_param('alt',$parstack,
3036: $safeeval,undef,1);
3037: unless ($alttag) {
3038: my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
3039: undef,1);
3040: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
3041: $code);
3042: }
3043: $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
3044: '.}\end{center}';
3045: }
3046: return $currentstring;
3047: }
3048:
3049: sub end_applet {
3050: my ($target,$token) = @_;
3051: my $currentstring = '';
3052: if ($target eq 'web' || $target eq 'webgrade') {
3053: $currentstring = $token->[2];
3054: } elsif ($target eq 'tex') {
3055: }
3056: return $currentstring;
3057: }
3058:
3059: #-- <embed> tag (end tag optional/required)
3060: sub start_embed {
3061: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3062: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3063: &Apache::lonxml::extlink($src);
3064: my $currentstring = '';
3065: if ($target eq 'web' || $target eq 'webgrade') {
3066: if ($env{'browser.embedsuppress'} ne 'on') {
3067: $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
3068: } else {
3069: my $alttag=&Apache::lonxml::get_param
3070: ('alt',$parstack,$safeeval,undef,1);
3071: unless ($alttag) {
3072: $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
3073: }
3074: $currentstring='[EMBED: '.$alttag.']';
3075: }
3076: } elsif ($target eq 'tex') {
3077: }
3078: return $currentstring;
3079: }
3080:
3081: sub end_embed {
3082: my ($target,$token) = @_;
3083: my $currentstring = '';
3084: if ($target eq 'web' || $target eq 'webgrade') {
3085: $currentstring = $token->[2];
3086: } elsif ($target eq 'tex') {
3087: }
3088: return $currentstring;
3089: }
3090:
3091: #-- <param> tag (end tag forbidden)
3092: sub start_param {
3093: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3094: if (&Apache::lonxml::get_param('name',$parstack,
3095: $safeeval,undef,1)=~/^cabbase$/i) {
3096: my $value=&Apache::lonxml::get_param('value',$parstack,
3097: $safeeval,undef,1);
3098: &Apache::lonxml::extlink($value);
3099: }
3100:
3101: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3102: &Apache::lonxml::extlink($src);
3103: my $currentstring = '';
3104: if ($target eq 'web' || $target eq 'webgrade') {
3105: my %toconvert;
3106: my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3107: if ($src) { $toconvert{'src'}= $src; }
3108: my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
3109: undef,1);
3110: if ($name=~/^cabbase$/i) {
3111: $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
3112: $safeeval,undef,1);
3113: }
3114: $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
3115: } elsif ($target eq 'tex') {
3116: }
3117: return $currentstring;
3118: }
3119:
3120: sub end_param {
3121: my ($target,$token) = @_;
3122: my $currentstring = '';
3123: if ($target eq 'web' || $target eq 'webgrade') {
3124: $currentstring = $token->[2];
3125: } elsif ($target eq 'tex') {
3126: }
3127: return $currentstring;
3128: }
3129:
3130: #-- <allow> tag
3131: sub start_allow {
3132: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3133: my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
3134: &Apache::lonxml::extlink($src);
3135:
3136: if ($target eq 'tex') { &image_replication($src); }
3137: my $result;
3138: if ($target eq 'edit') {
3139: $result .=&Apache::edit::tag_start($target,$token);
3140: $result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
3141: $result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
3142: } elsif ($target eq 'modified') {
3143: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
3144: $safeeval,'src');
3145: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
3146: }
3147: return $result;
3148: }
3149:
3150: sub end_allow {
3151: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3152: if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
3153: return '';
3154: }
3155:
3156: #-- Frames (end tag required)
3157: #-- <frameset>
3158: sub start_frameset {
3159: my ($target,$token) = @_;
3160: my $currentstring = ''; # Close any pending para.
3161: if ($target eq 'web' || $target eq 'webgrade') {
3162: $currentstring =
3163: &Apache::loncommon::start_page($Apache::londefdef::title,
3164: $Apache::londefdef::head,
3165: {'add_entries' => $token->[2],
3166: 'no_title' => 1,
3167: 'force_register' => 1,
3168: 'frameset' => 1,});
3169:
3170: }
3171: return $currentstring;
3172: }
3173:
3174: sub end_frameset {
3175: my ($target,$token) = @_;
3176: my $currentstring = '';
3177: if ($target eq 'web' || $target eq 'webgrade') {
3178: $currentstring = $token->[2];
3179: }
3180: return $currentstring;
3181: }
3182:
3183: #-- <xmp> (end tag required)
3184: sub start_xmp {
3185: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3186: my $currentstring = '';
3187: if ($target eq 'web' || $target eq 'webgrade') {
3188: $currentstring .= $token->[4];
3189: } elsif ($target eq 'tex') {
3190: $currentstring .= '\begin{verbatim}';
3191: }
3192: return $currentstring;
3193: }
3194:
3195: sub end_xmp {
3196: my ($target,$token) = @_;
3197: my $currentstring = '';
3198: if ($target eq 'web' || $target eq 'webgrade') {
3199: $currentstring .= $token->[2];
3200: } elsif ($target eq 'tex') {
3201: $currentstring .= '\end{verbatim}';
3202: }
3203: return $currentstring;
3204: }
3205:
3206: #-- <pre> (end tag required)
3207: sub start_pre {
3208: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3209: my $currentstring = &end_p(); # close off pending <p>
3210: if ($target eq 'web' || $target eq 'webgrade') {
3211: $currentstring .= $token->[4];
3212: } elsif ($target eq 'tex') {
3213: $currentstring .= '\begin{verbatim}';
3214: &Apache::lonxml::disable_LaTeX_substitutions();
3215: }
3216: return $currentstring;
3217: }
3218:
3219: sub end_pre {
3220: my ($target,$token) = @_;
3221: my $currentstring = '';
3222: if ($target eq 'web' || $target eq 'webgrade') {
3223: $currentstring .= $token->[2];
3224: } elsif ($target eq 'tex') {
3225: $currentstring .= '\end{verbatim}';
3226: &Apache::lonxml::enable_LaTeX_substitutions();
3227: }
3228: return $currentstring;
3229: }
3230:
3231: #-- <insert>
3232: sub start_insert {
3233: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3234: my $currentstring = '';
3235: if ($target eq 'web' || $target eq 'webgrade') {
3236: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3237: $currentstring .= '<b>'.$display.'</b>';;
3238: }
3239: return $currentstring;
3240: }
3241:
3242: sub end_insert {
3243: my ($target,$token) = @_;
3244: my $currentstring = '';
3245: if ($target eq 'web' || $target eq 'webgrade') {
3246: $currentstring .= '';
3247: }
3248: return $currentstring;
3249: }
3250:
3251: #-- <externallink>
3252: sub start_externallink {
3253: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3254: my $currentstring = '';
3255: if ($target eq 'web' || $target eq 'webgrade') {
3256: my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
3257: $currentstring .= '<b>'.$display.'</b>';;
3258: }
3259: return $currentstring;
3260: }
3261:
3262: sub end_externallink {
3263: my ($target,$token) = @_;
3264: my $currentstring = '';
3265: if ($target eq 'web' || $target eq 'webgrade') {
3266: $currentstring .= '';
3267: }
3268: return $currentstring;
3269: }
3270:
3271: #-- <blankspace heigth="">
3272: sub start_blankspace {
3273: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3274: my $currentstring = &end_p(); # closes off any unclosed <p>
3275: if ($target eq 'tex') {
3276: my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval,undef,1);
3277: $currentstring .= '\vskip '.$howmuch.' ';
3278: }
3279: return $currentstring;
3280: }
3281:
3282: sub end_blankspace {
3283: my ($target,$token) = @_;
3284: my $currentstring = '';
3285: if ($target eq 'tex') {
3286: $currentstring .= '';
3287: }
3288: return $currentstring;
3289: }
3290:
3291: #-- <abbr> tag (end tag required)
3292: sub start_abbr {
3293: my ($target,$token) = @_;
3294: my $currentstring = '';
3295: if ($target eq 'web' || $target eq 'webgrade') {
3296: $currentstring = $token->[4];
3297: }
3298: return $currentstring;
3299: }
3300:
3301: sub end_abbr {
3302: my ($target,$token) = @_;
3303: my $currentstring = '';
3304: if ($target eq 'web' || $target eq 'webgrade') {
3305: $currentstring = $token->[2];
3306: }
3307: return $currentstring;
3308: }
3309:
3310: #-- <acronym> tag (end tag required)
3311: sub start_acronym {
3312: my ($target,$token) = @_;
3313: my $currentstring = '';
3314: if ($target eq 'web' || $target eq 'webgrade') {
3315: $currentstring = $token->[4];
3316: }
3317: return $currentstring;
3318: }
3319:
3320: sub end_acronym {
3321: my ($target,$token) = @_;
3322: my $currentstring = '';
3323: if ($target eq 'web' || $target eq 'webgrade') {
3324: $currentstring = $token->[2];
3325: }
3326: return $currentstring;
3327: }
3328:
3329: #-- <area> tag (end tag forbidden)
3330: sub start_area {
3331: my ($target,$token) = @_;
3332: my $currentstring = '';
3333: if ($target eq 'web' || $target eq 'webgrade') {
3334: $currentstring = $token->[4];
3335: }
3336: return $currentstring;
3337: }
3338:
3339: sub end_area {
3340: my ($target,$token) = @_;
3341: my $currentstring = '';
3342: if ($target eq 'web' || $target eq 'webgrade') {
3343: $currentstring = $token->[2];
3344: }
3345: return $currentstring;
3346: }
3347:
3348: #-- <base> tag (end tag forbidden)
3349: sub start_base {
3350: my ($target,$token) = @_;
3351: my $currentstring = '';
3352: if ($target eq 'web' || $target eq 'webgrade') {
3353: $currentstring = $token->[4];
3354: }
3355: return $currentstring;
3356: }
3357:
3358: sub end_base {
3359: my ($target,$token) = @_;
3360: my $currentstring = '';
3361: if ($target eq 'web' || $target eq 'webgrade') {
3362: $currentstring = $token->[2];
3363: }
3364: return $currentstring;
3365: }
3366:
3367: #-- <bdo> tag (end tag required)
3368: sub start_bdo {
3369: my ($target,$token) = @_;
3370: my $currentstring = '';
3371: if ($target eq 'web' || $target eq 'webgrade') {
3372: $currentstring = $token->[4];
3373: }
3374: return $currentstring;
3375: }
3376:
3377: sub end_bdo {
3378: my ($target,$token) = @_;
3379: my $currentstring = '';
3380: if ($target eq 'web' || $target eq 'webgrade') {
3381: $currentstring = $token->[2];
3382: }
3383: return $currentstring;
3384: }
3385:
3386: #-- <bgsound> tag (end tag optional)
3387: sub start_bgsound {
3388: my ($target,$token) = @_;
3389: my $currentstring = '';
3390: if ($target eq 'web' || $target eq 'webgrade') {
3391: $currentstring = $token->[4];
3392: }
3393: return $currentstring;
3394: }
3395:
3396: sub end_bgsound {
3397: my ($target,$token) = @_;
3398: my $currentstring = '';
3399: if ($target eq 'web' || $target eq 'webgrade') {
3400: $currentstring = $token->[2];
3401: }
3402: return $currentstring;
3403: }
3404:
3405: #-- <blink> tag (end tag required)
3406: sub start_blink {
3407: my ($target,$token) = @_;
3408: my $currentstring = '';
3409: if ($target eq 'web' || $target eq 'webgrade') {
3410: $currentstring = $token->[4];
3411: }
3412: return $currentstring;
3413: }
3414:
3415: sub end_blink {
3416: my ($target,$token) = @_;
3417: my $currentstring = '';
3418: if ($target eq 'web' || $target eq 'webgrade') {
3419: $currentstring = $token->[2];
3420: }
3421: return $currentstring;
3422: }
3423:
3424: #-- <blockquote> tag (end tag required)
3425: sub start_blockquote {
3426: my ($target,$token) = @_;
3427: my $currentstring = &end_p(); # Close any unclosed <p>
3428: if ($target eq 'web' || $target eq 'webgrade') {
3429: $currentstring .= $token->[4];
3430: }
3431: if ($target eq 'tex') {
3432: $currentstring .= '\begin{quote}';
3433: }
3434: return $currentstring;
3435: }
3436:
3437: sub end_blockquote {
3438: my ($target,$token) = @_;
3439: my $currentstring = '';
3440: if ($target eq 'web' || $target eq 'webgrade') {
3441: $currentstring = $token->[2];
3442: }
3443: if ($target eq 'tex') {
3444: $currentstring = '\end{quote}';
3445: }
3446: return $currentstring;
3447: }
3448:
3449: #-- <button> tag (end tag required)
3450: sub start_button {
3451: my ($target,$token) = @_;
3452: my $currentstring = '';
3453: if ($target eq 'web' || $target eq 'webgrade') {
3454: $currentstring = $token->[4];
3455: }
3456: return $currentstring;
3457: }
3458:
3459: sub end_button {
3460: my ($target,$token) = @_;
3461: my $currentstring = '';
3462: if ($target eq 'web' || $target eq 'webgrade') {
3463: $currentstring = $token->[2];
3464: }
3465: return $currentstring;
3466: }
3467:
3468: #-- <caption> tag (end tag required)
3469: sub start_caption {
3470: my ($target,$token) = @_;
3471: my $currentstring = '';
3472: if ($target eq 'web' || $target eq 'webgrade') {
3473: $currentstring = $token->[4];
3474: }
3475: return $currentstring;
3476: }
3477:
3478: sub end_caption {
3479: my ($target,$token) = @_;
3480: my $currentstring = '';
3481: if ($target eq 'web' || $target eq 'webgrade') {
3482: $currentstring = $token->[2];
3483: }
3484: return $currentstring;
3485: }
3486:
3487: #-- <col> tag (end tag forbdden)
3488: sub start_col {
3489: my ($target,$token) = @_;
3490: my $currentstring = '';
3491: if ($target eq 'web' || $target eq 'webgrade') {
3492: $currentstring = $token->[4];
3493: }
3494: return $currentstring;
3495: }
3496:
3497: sub end_col {
3498: my ($target,$token) = @_;
3499: my $currentstring = '';
3500: if ($target eq 'web' || $target eq 'webgrade') {
3501: $currentstring = $token->[2];
3502: }
3503: return $currentstring;
3504: }
3505:
3506: #-- <colgroup> tag (end tag optional)
3507: sub start_colgroup {
3508: my ($target,$token) = @_;
3509: my $currentstring = '';
3510: if ($target eq 'web' || $target eq 'webgrade') {
3511: $currentstring = $token->[4];
3512: }
3513: return $currentstring;
3514: }
3515:
3516: sub end_colgroup {
3517: my ($target,$token) = @_;
3518: my $currentstring = '';
3519: if ($target eq 'web' || $target eq 'webgrade') {
3520: $currentstring = $token->[2];
3521: }
3522: return $currentstring;
3523: }
3524:
3525: #-- <del> tag (end tag required)
3526: sub start_del {
3527: my ($target,$token) = @_;
3528: my $currentstring = '';
3529: if ($target eq 'web' || $target eq 'webgrade') {
3530: $currentstring = $token->[4];
3531: }
3532: return $currentstring;
3533: }
3534:
3535: sub end_del {
3536: my ($target,$token) = @_;
3537: my $currentstring = '';
3538: if ($target eq 'web' || $target eq 'webgrade') {
3539: $currentstring = $token->[2];
3540: }
3541: return $currentstring;
3542: }
3543:
3544: #-- <fieldset> tag (end tag required)
3545: sub start_fieldset {
3546: my ($target,$token) = @_;
3547: my $currentstring = '';
3548: if ($target eq 'web' || $target eq 'webgrade') {
3549: $currentstring = $token->[4];
3550: }
3551: return $currentstring;
3552: }
3553:
3554: sub end_fieldset {
3555: my ($target,$token) = @_;
3556: my $currentstring = '';
3557: if ($target eq 'web' || $target eq 'webgrade') {
3558: $currentstring = $token->[2];
3559: }
3560: return $currentstring;
3561: }
3562:
3563: #-- <frame> tag (end tag forbidden)
3564: sub start_frame {
3565: my ($target,$token) = @_;
3566: my $currentstring = '';
3567: if ($target eq 'web' || $target eq 'webgrade') {
3568: $currentstring = $token->[4];
3569: }
3570: return $currentstring;
3571: }
3572:
3573: sub end_frame {
3574: my ($target,$token) = @_;
3575: my $currentstring = '';
3576: if ($target eq 'web' || $target eq 'webgrade') {
3577: $currentstring = $token->[2];
3578: }
3579: return $currentstring;
3580: }
3581:
3582: #-- <iframe> tag (end tag required)
3583: sub start_iframe {
3584: my ($target,$token) = @_;
3585: my $currentstring = '';
3586: if ($target eq 'web' || $target eq 'webgrade') {
3587: $currentstring = $token->[4];
3588: }
3589: return $currentstring;
3590: }
3591:
3592: sub end_iframe {
3593: my ($target,$token) = @_;
3594: my $currentstring = '';
3595: if ($target eq 'web' || $target eq 'webgrade') {
3596: $currentstring = $token->[2];
3597: }
3598: return $currentstring;
3599: }
3600:
3601: #-- <ins> tag (end tag required)
3602: sub start_ins {
3603: my ($target,$token) = @_;
3604: my $currentstring = '';
3605: if ($target eq 'web' || $target eq 'webgrade') {
3606: $currentstring = $token->[4];
3607: }
3608: return $currentstring;
3609: }
3610:
3611: sub end_ins {
3612: my ($target,$token) = @_;
3613: my $currentstring = '';
3614: if ($target eq 'web' || $target eq 'webgrade') {
3615: $currentstring = $token->[2];
3616: }
3617: return $currentstring;
3618: }
3619:
3620: #-- <isindex> tag (end tag forbidden)
3621: sub start_isindex {
3622: my ($target,$token) = @_;
3623: my $currentstring = '';
3624: if ($target eq 'web' || $target eq 'webgrade') {
3625: $currentstring = $token->[4];
3626: }
3627: return $currentstring;
3628: }
3629:
3630: sub end_isindex {
3631: my ($target,$token) = @_;
3632: my $currentstring = '';
3633: if ($target eq 'web' || $target eq 'webgrade') {
3634: $currentstring = $token->[2];
3635: }
3636: return $currentstring;
3637: }
3638:
3639: #-- <keygen> tag (end tag forbidden)
3640: sub start_keygen {
3641: my ($target,$token) = @_;
3642: my $currentstring = '';
3643: if ($target eq 'web' || $target eq 'webgrade') {
3644: $currentstring = $token->[4];
3645: }
3646: return $currentstring;
3647: }
3648:
3649: sub end_keygen {
3650: my ($target,$token) = @_;
3651: my $currentstring = '';
3652: if ($target eq 'web' || $target eq 'webgrade') {
3653: $currentstring = $token->[2];
3654: }
3655: return $currentstring;
3656: }
3657:
3658: #-- <label> tag
3659: sub start_label {
3660: my ($target,$token) = @_;
3661: my $currentstring = '';
3662: if ($target eq 'web' || $target eq 'webgrade') {
3663: $currentstring = $token->[4];
3664: }
3665: return $currentstring;
3666: }
3667:
3668: sub end_label {
3669: my ($target,$token) = @_;
3670: my $currentstring = '';
3671: if ($target eq 'web' || $target eq 'webgrade') {
3672: $currentstring = $token->[2];
3673: }
3674: return $currentstring;
3675: }
3676:
3677: #-- <layer> tag (end tag required)
3678: sub start_layer {
3679: my ($target,$token) = @_;
3680: my $currentstring = '';
3681: if ($target eq 'web' || $target eq 'webgrade') {
3682: $currentstring = $token->[4];
3683: }
3684: return $currentstring;
3685: }
3686:
3687: sub end_layer {
3688: my ($target,$token) = @_;
3689: my $currentstring = '';
3690: if ($target eq 'web' || $target eq 'webgrade') {
3691: $currentstring = $token->[2];
3692: }
3693: return $currentstring;
3694: }
3695:
3696: #-- <legend> tag (end tag required)
3697: sub start_legend {
3698: my ($target,$token) = @_;
3699: my $currentstring = '';
3700: if ($target eq 'web' || $target eq 'webgrade') {
3701: $currentstring = $token->[4];
3702: }
3703: return $currentstring;
3704: }
3705:
3706: sub end_legend {
3707: my ($target,$token) = @_;
3708: my $currentstring = '';
3709: if ($target eq 'web' || $target eq 'webgrade') {
3710: $currentstring = $token->[2];
3711: }
3712: return $currentstring;
3713: }
3714:
3715: #-- <link> tag (end tag forbidden)
3716: sub start_link {
3717: my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
3718: my $currentstring = '';
3719: if ($target eq 'web' || $target eq 'webgrade') {
3720: my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
3721: undef,1);
3722: &Apache::lonxml::extlink($href);
3723: $currentstring = $token->[4];
3724: }
3725: return $currentstring;
3726: }
3727:
3728: sub end_link {
3729: my ($target,$token) = @_;
3730: my $currentstring = '';
3731: if ($target eq 'web' || $target eq 'webgrade') {
3732: $currentstring = $token->[2];
3733: }
3734: return $currentstring;
3735: }
3736:
3737: #-- <marquee> tag (end tag optional)
3738: sub start_marquee {
3739: my ($target,$token) = @_;
3740: my $currentstring = '';
3741: if ($target eq 'web' || $target eq 'webgrade') {
3742: $currentstring = $token->[4];
3743: }
3744: return $currentstring;
3745: }
3746:
3747: sub end_marquee {
3748: my ($target,$token) = @_;
3749: my $currentstring = '';
3750: if ($target eq 'web' || $target eq 'webgrade') {
3751: $currentstring = $token->[2];
3752: }
3753: return $currentstring;
3754: }
3755:
3756: #-- <multicol> tag (end tag required)
3757: sub start_multicol {
3758: my ($target,$token) = @_;
3759: my $currentstring = &end_p(); # Close any pending <p>
3760: if ($target eq 'web' || $target eq 'webgrade') {
3761: $currentstring .= $token->[4];
3762: }
3763: return $currentstring;
3764: }
3765:
3766: sub end_multicol {
3767: my ($target,$token) = @_;
3768: my $currentstring = '';
3769: if ($target eq 'web' || $target eq 'webgrade') {
3770: $currentstring = $token->[2];
3771: }
3772: return $currentstring;
3773: }
3774:
3775: #-- <nobr> tag (end tag required)
3776: sub start_nobr {
3777: my ($target,$token) = @_;
3778: my $currentstring = '';
3779: if ($target eq 'web' || $target eq 'webgrade') {
3780: $currentstring = $token->[4];
3781: } elsif ($target eq 'tex') {
3782: $currentstring='\mbox{';
3783: }
3784: return $currentstring;
3785: }
3786:
3787: sub end_nobr {
3788: my ($target,$token) = @_;
3789: my $currentstring = '';
3790: if ($target eq 'web' || $target eq 'webgrade') {
3791: $currentstring = $token->[2];
3792: } elsif ($target eq 'tex') {
3793: $currentstring='}';
3794: }
3795: return $currentstring;
3796: }
3797:
3798: #-- <noembed> tag (end tag required)
3799: sub start_noembed {
3800: my ($target,$token) = @_;
3801: my $currentstring = '';
3802: if ($target eq 'web' || $target eq 'webgrade') {
3803: $currentstring = $token->[4];
3804: }
3805: return $currentstring;
3806: }
3807:
3808: sub end_noembed {
3809: my ($target,$token) = @_;
3810: my $currentstring = '';
3811: if ($target eq 'web' || $target eq 'webgrade') {
3812: $currentstring = $token->[2];
3813: }
3814: return $currentstring;
3815: }
3816:
3817: #-- <noframes> tag (end tag required)
3818: sub start_noframes {
3819: my ($target,$token) = @_;
3820: my $currentstring = '';
3821: if ($target eq 'web' || $target eq 'webgrade') {
3822: $currentstring = $token->[4];
3823: }
3824: return $currentstring;
3825: }
3826:
3827: sub end_noframes {
3828: my ($target,$token) = @_;
3829: my $currentstring = '';
3830: if ($target eq 'web' || $target eq 'webgrade') {
3831: $currentstring = $token->[2];
3832: }
3833: return $currentstring;
3834: }
3835:
3836: #-- <nolayer> tag (end tag required)
3837: sub start_nolayer {
3838: my ($target,$token) = @_;
3839: my $currentstring = '';
3840: if ($target eq 'web' || $target eq 'webgrade') {
3841: $currentstring = $token->[4];
3842: }
3843: return $currentstring;
3844: }
3845:
3846: sub end_nolayer {
3847: my ($target,$token) = @_;
3848: my $currentstring = '';
3849: if ($target eq 'web' || $target eq 'webgrade') {
3850: $currentstring = $token->[2];
3851: }
3852: return $currentstring;
3853: }
3854:
3855: #-- <noscript> tag (end tag required)
3856: sub start_noscript {
3857: my ($target,$token) = @_;
3858: my $currentstring = '';
3859: if ($target eq 'web' || $target eq 'webgrade') {
3860: $currentstring = $token->[4];
3861: }
3862: return $currentstring;
3863: }
3864:
3865: sub end_noscript {
3866: my ($target,$token) = @_;
3867: my $currentstring = '';
3868: if ($target eq 'web' || $target eq 'webgrade') {
3869: $currentstring = $token->[2];
3870: }
3871: return $currentstring;
3872: }
3873:
3874: #-- <object> tag (end tag required)
3875: sub start_object {
3876: my ($target,$token) = @_;
3877: my $currentstring = '';
3878: if ($target eq 'web' || $target eq 'webgrade') {
3879: $currentstring = $token->[4];
3880: }
3881: return $currentstring;
3882: }
3883:
3884: sub end_object {
3885: my ($target,$token) = @_;
3886: my $currentstring = '';
3887: if ($target eq 'web' || $target eq 'webgrade') {
3888: $currentstring = $token->[2];
3889: }
3890: return $currentstring;
3891: }
3892:
3893: #-- <optgroup> tag (end tag required)
3894: sub start_optgroup {
3895: my ($target,$token) = @_;
3896: my $currentstring = '';
3897: if ($target eq 'web' || $target eq 'webgrade') {
3898: $currentstring = $token->[4];
3899: }
3900: return $currentstring;
3901: }
3902:
3903: sub end_optgroup {
3904: my ($target,$token) = @_;
3905: my $currentstring = '';
3906: if ($target eq 'web' || $target eq 'webgrade') {
3907: $currentstring = $token->[2];
3908: }
3909: return $currentstring;
3910: }
3911:
3912: #-- <samp> tag (end tag required)
3913: sub start_samp {
3914: my ($target,$token) = @_;
3915: my $currentstring = '';
3916: if ($target eq 'web' || $target eq 'webgrade') {
3917: $currentstring = $token->[4];
3918: } elsif ($target eq 'tex') {
3919: $currentstring='\texttt{';
3920: }
3921: return $currentstring;
3922: }
3923:
3924: sub end_samp {
3925: my ($target,$token) = @_;
3926: my $currentstring = '';
3927: if ($target eq 'web' || $target eq 'webgrade') {
3928: $currentstring = $token->[2];
3929: } elsif ($target eq 'tex') {
3930: $currentstring='}';
3931: }
3932: return $currentstring;
3933: }
3934:
3935: #-- <server> tag
3936: sub start_server {
3937: my ($target,$token) = @_;
3938: my $currentstring = '';
3939: if ($target eq 'web' || $target eq 'webgrade') {
3940: $currentstring = $token->[4];
3941: }
3942: return $currentstring;
3943: }
3944:
3945: sub end_server {
3946: my ($target,$token) = @_;
3947: my $currentstring = '';
3948: if ($target eq 'web' || $target eq 'webgrade') {
3949: $currentstring = $token->[2];
3950: }
3951: return $currentstring;
3952: }
3953:
3954: #-- <spacer> tag (end tag forbidden)
3955: sub start_spacer {
3956: my ($target,$token) = @_;
3957: my $currentstring = &end_p(); # Close off any open <p> tag.
3958: if ($target eq 'web' || $target eq 'webgrade') {
3959: $currentstring .= $token->[4];
3960: }
3961: return $currentstring;
3962: }
3963:
3964: sub end_spacer {
3965: my ($target,$token) = @_;
3966: my $currentstring = '';
3967: if ($target eq 'web' || $target eq 'webgrade') {
3968: $currentstring = $token->[2];
3969: }
3970: return $currentstring;
3971: }
3972:
3973: #-- <span> tag (end tag required)
3974: sub start_span {
3975: my ($target,$token) = @_;
3976: my $currentstring = '';
3977: if ($target eq 'web' || $target eq 'webgrade') {
3978: $currentstring = $token->[4];
3979: }
3980: return $currentstring;
3981: }
3982:
3983: sub end_span {
3984: my ($target,$token) = @_;
3985: my $currentstring = '';
3986: if ($target eq 'web' || $target eq 'webgrade') {
3987: $currentstring = $token->[2];
3988: }
3989: return $currentstring;
3990: }
3991:
3992: #-- <tbody> tag (end tag optional)
3993: sub start_tbody {
3994: my ($target,$token) = @_;
3995: my $currentstring = '';
3996: if ($target eq 'web' || $target eq 'webgrade') {
3997: $currentstring = $token->[4];
3998: }
3999: return $currentstring;
4000: }
4001:
4002: sub end_tbody {
4003: my ($target,$token) = @_;
4004: my $currentstring = '';
4005: if ($target eq 'web' || $target eq 'webgrade') {
4006: $currentstring = $token->[2];
4007: }
4008: return $currentstring;
4009: }
4010:
4011: #-- <tfoot> tag (end tag optional)
4012: sub start_tfoot {
4013: my ($target,$token) = @_;
4014: my $currentstring = '';
4015: if ($target eq 'web' || $target eq 'webgrade') {
4016: $currentstring = $token->[4];
4017: }
4018: return $currentstring;
4019: }
4020:
4021: sub end_tfoot {
4022: my ($target,$token) = @_;
4023: my $currentstring = '';
4024: if ($target eq 'web' || $target eq 'webgrade') {
4025: $currentstring = $token->[2];
4026: }
4027: return $currentstring;
4028: }
4029:
4030: #-- <thead> tag (end tag optional)
4031: sub start_thead {
4032: my ($target,$token) = @_;
4033: my $currentstring = '';
4034: if ($target eq 'web' || $target eq 'webgrade') {
4035: $currentstring = $token->[4];
4036: }
4037: return $currentstring;
4038: }
4039:
4040: sub end_thead {
4041: my ($target,$token) = @_;
4042: my $currentstring = '';
4043: if ($target eq 'web' || $target eq 'webgrade') {
4044: $currentstring = $token->[2];
4045: }
4046: return $currentstring;
4047: }
4048:
4049: #-- <var> tag
4050: sub start_var {
4051: my ($target,$token) = @_;
4052: my $currentstring = '';
4053: if ($target eq 'web' || $target eq 'webgrade') {
4054: $currentstring = $token->[4];
4055: } elsif ($target eq 'tex') {
4056: $currentstring = '\textit{';
4057: }
4058: return $currentstring;
4059: }
4060:
4061: sub end_var {
4062: my ($target,$token) = @_;
4063: my $currentstring = '';
4064: if ($target eq 'web' || $target eq 'webgrade') {
4065: $currentstring = $token->[2];
4066: } elsif ($target eq 'tex') {
4067: $currentstring = '}';
4068: }
4069: return $currentstring;
4070: }
4071:
4072: #-- <wbr> tag (end tag forbidden)
4073: sub start_wbr {
4074: my ($target,$token) = @_;
4075: my $currentstring = '';
4076: if ($target eq 'web' || $target eq 'webgrade') {
4077: $currentstring = $token->[4];
4078: }
4079: return $currentstring;
4080: }
4081:
4082: sub end_wbr {
4083: my ($target,$token) = @_;
4084: my $currentstring = '';
4085: if ($target eq 'web' || $target eq 'webgrade') {
4086: $currentstring = $token->[2];
4087: }
4088: return $currentstring;
4089: }
4090:
4091: #-- <hideweboutput> tag
4092: sub start_hideweboutput {
4093: my ($target,$token) = @_;
4094: if ($target eq 'web' || $target eq 'webgrade') {
4095: &Apache::lonxml::startredirection();
4096: }
4097: return '';
4098: }
4099:
4100: sub end_hideweboutput {
4101: my ($target,$token) = @_;
4102: my $currentstring = '';
4103: if ($target eq 'web' || $target eq 'webgrade') {
4104: $currentstring = &Apache::lonxml::endredirection();
4105: }
4106: return '';
4107: }
4108:
4109:
4110: sub image_replication {
4111: my $src = shift;
4112: if (not -e $src) { &Apache::lonnet::repcopy($src); }
4113: #replicates eps or ps
4114: my $epssrc = my $pssrc = $src;
4115: $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
4116: $pssrc =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
4117: if (not -e $epssrc && not -e $pssrc) {
4118: my $result=&Apache::lonnet::repcopy($epssrc);
4119: if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
4120: }
4121: return '';
4122: }
4123: #
4124: # Get correct sizing parameter for an image given
4125: # it's initial ht. and wid. This allows sizing of
4126: # images that are generated on-the-fly (e.g. gnuplot)
4127: # as well as serving as a utility for image_size.
4128: #
4129: # Parameter:
4130: # height_param
4131: # width_param - Initial picture dimensions.
4132: # scaling - A scale factor.
4133: # parstack, - the current stack of tag attributes
4134: # from the xml parser
4135: # safeeval, - pointer to the safespace
4136: # depth, - from what level in the stack to look for attributes
4137: # (assumes -1 if unspecified)
4138: # cis - look for attrubutes case insensitively
4139: # (assumes false)
4140: #
4141: # Returns:
4142: # height, width - new dimensions.
4143: #
4144: sub resize_image {
4145: my ($height_param, $width_param, $scaling,
4146: $parstack, $safeeval, $depth, $cis) = @_;
4147:
4148: # First apply the scaling...
4149:
4150: $height_param = $height_param * $scaling;
4151: $width_param = $width_param * $scaling;
4152:
4153: #do we have any specified LaTeX size of the picture?
4154: my $toget='TeXwidth';
4155: if ($cis) {
4156: $toget=lc($toget);
4157: }
4158: my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
4159: $safeeval,$depth,$cis);
4160: $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
4161: my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
4162: $safeeval,$depth,$cis);
4163: #do we have any specified web size of the picture?
4164: my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
4165: $depth,1);
4166: if ($TeXwidth) {
4167: my $old_width_param=$width_param;
4168: if ($TeXwidth=~/(\d+)\s*\%/) {
4169: $width_param = $1*$env{'form.textwidth'}/100;
4170: } else {
4171: $width_param = $TeXwidth;
4172: }
4173: if ($TeXheight) {
4174: $height_param = $TeXheight;
4175: } elsif ($old_width_param) {
4176: $height_param=$TeXwidth/$old_width_param*$height_param;
4177: }
4178: } elsif ($TeXheight) {
4179: $height_param = $TeXheight;
4180: if ($height_param) {
4181: $width_param = $TeXheight/$height_param*$width_param;
4182: }
4183: } elsif ($width) {
4184: my $old_width_param=$width_param;
4185: $width_param = $width*$scaling;
4186: if ($old_width_param) {
4187: $height_param=$width_param/$old_width_param*$height_param;
4188: }
4189: }
4190: if ($width_param > $env{'form.textwidth'}) {
4191: my $old_width_param=$width_param;
4192: $width_param =0.95*$env{'form.textwidth'};
4193: if ($old_width_param) {
4194: $height_param=$width_param/$old_width_param*$height_param;
4195: }
4196: }
4197:
4198: return ($height_param, $width_param);
4199: }
4200:
4201: sub image_size {
4202: my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
4203:
4204: #size of image from gif/jpg/jpeg/png
4205: my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4206: if (-e $ressrc) {
4207: $src = $ressrc;
4208: }
4209: my $image = Image::Magick->new;
4210: my $current_figure = $image->Read($src);
4211: my $width_param = $image->Get('width');
4212: my $height_param = $image->Get('height');
4213: &Apache::lonxml::debug("Image magick says: $src : Height = $height_param width = $width_param");
4214: undef($image);
4215:
4216: ($height_param, $width_param) = &resize_image($height_param, $width_param,
4217: $scaling, $parstack, $safeeval,
4218: $depth, $cis);
4219:
4220: return ($height_param, $width_param);
4221: }
4222:
4223: sub image_width {
4224: my ($height, $width) = &image_size(@_);
4225: return $width;
4226: }
4227: # Not yet 100% sure this is correct in all circumstances..
4228: # due to my uncertainty about mods to image_size.
4229: #
4230: sub image_height {
4231: my ($height, $width) = &image_size(@_);
4232: return $height;
4233: }
4234:
4235: sub get_eps_image {
4236: my ($src)=@_;
4237: my $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
4238:
4239: # In order to prevent the substitution of the alt text, we need to
4240: # be sure the orig_src file is on system now so:
4241:
4242: if (! -e $orig_src) {
4243: &Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
4244: }
4245: &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
4246: my ($spath, $sname, $sext) = fileparse($src, qr/\.(gif|png|jpg|jpeg)/i);
4247: $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
4248: $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
4249: &Apache::lonxml::debug("Filelocation gives: $src");
4250: if (! -e $src) {
4251: # &Apache::lonnet::logthis("$src does not exist...repcopying");
4252: &Apache::lonxml::debug("$src does not exist");
4253: if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
4254: &Apache::lonxml::debug("Repcopy of $src failed (1)");
4255: #if replication failed try to find ps file
4256: $src=~s/\.eps$/\.ps/;
4257: &Apache::lonxml::debug("Now looking for $src");
4258: #if no ps file try to replicate it.
4259: my $didrepcopy = &Apache::lonnet::repcopy($src);
4260: &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
4261: if ( (not -e $src) ||
4262: ($didrepcopy ne 'ok')) {
4263: # &Apache::lonnet::logthis("queuing $orig_src for dynamic eps gen");
4264: &Apache::lonxml::debug("Failed to find or replicate $src");
4265:
4266: #if replication failed try to produce eps file dynamically
4267: $src=~s/\.ps$/\.eps/;
4268: my $temp_file;
4269: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4270: my $newsrc=$orig_src;
4271: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4272: &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
4273: print FILE "$newsrc\n";
4274: close FILE;
4275: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4276: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4277: if ($sext ne "") { # Put the ext. back in to uniquify.
4278: $src =~ s/\.eps$/$sext.eps/;
4279: }
4280:
4281: }
4282: }
4283: } else {
4284: # &Apache::lonnet::logthis("$src exists. queueing for copy.");
4285: # &Apache::lonnet::logthis("Got eps already.. queue for copy");
4286: # If the postscript file has spaces in its name,
4287: # LaTeX will gratuitiously vomit. Therefore
4288: # queue such files for copy with " " replaced by "_".
4289: # printout.pm will know them by their .ps or .eps extensions.
4290: my $newsrc = $orig_src;
4291: $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
4292: open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
4293: # &Apache::lonnet::logthis("Queueing $newsrc for copy");
4294: print FILE "$newsrc\n";
4295: close FILE;
4296: $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
4297: $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
4298: }
4299: my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
4300: &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
4301: return ($path.'/',$file);
4302: }
4303:
4304: sub eps_generation {
4305: my ($src,$file,$width_param) = @_;
4306: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
4307: my $temp_file = Apache::File->new('>>'.$filename);
4308: print $temp_file "$src\n";
4309: my $newsrc = $src;
4310: $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
4311: $newsrc=~s/\/home\/httpd\/html\/res//;
4312: $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
4313: $newsrc=~s/\/\.\//\//;
4314: $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
4315: if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
4316: $newsrc=~s/\/home\/httpd\/lonUsers//;
4317: $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
4318: }
4319: if ($newsrc=~/\/userfiles\//) {
4320: return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4321: } else {
4322: return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
4323: }
4324: }
4325:
4326: sub file_path {
4327: my $src=shift;
4328: my ($file,$path);
4329: if ($src =~ m!(.*)/([^/]*)$!) {
4330: $file = $2;
4331: $path = $1.'/';
4332: }
4333: return $file,$path;
4334: }
4335: # Converts a measurement in to mm from any of
4336: # the other valid LaTeX units of measure.
4337: # If the units of measure are missing from the
4338: # parameter, it is assumed to be in and returned
4339: # with mm units of measure
4340: sub recalc {
4341: my $argument = shift;
4342: if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
4343: $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
4344: my $value=$1;
4345: my $units=$2;
4346: if ($units eq 'cm') {
4347: $value*=10;
4348: } elsif ($units eq 'in') {
4349: $value*=25.4;
4350: } elsif ($units eq 'pc') {
4351: $value*=(25.4*12/72.27);
4352: } elsif ($units eq 'pt') {
4353: $value*=(25.4/72.27);
4354: }
4355: return $value.' mm';
4356: }
4357:
4358: sub LATEX_length {
4359: my $garbage=shift;
4360: $garbage=~s/^\s+$//;
4361: $garbage=~s/^\s+(\S.*)/$1/;#space before
4362: $garbage=~s/(.*\S)\s+$/$1/;#space after
4363: $garbage=~s/(\s)+/$1/;#only one space
4364: $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
4365: $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
4366: $garbage=~s/([^\\])\$/$1/g;#$
4367: $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
4368: $garbage=~s/(\\alpha|\\beta|\\gamma|\\delta|\\epsilon|\\verepsilon|\\zeta|\\eta|\\theta|\\vartheta|\\iota|\\kappa|\\lambda|\\mu|\\nu|\\xi|\\pi|\\varpi|\\rho|\\varrho|\\sigma|\\varsigma|\\tau|\\upsilon|\\phi|\\varphi|\\chi|\\psi|\\omega|\\Gamma|\\Delta|\\Theta|\\Lambda|\\Xi|\\Pi|\\Sigma|\\Upsilon|\\Phi|\\Psi|\\Omega)/1/g;
4369: $garbage=~s/(\\pm|\\mp|\\times|\\div|\\cdot|\\ast|\\star|\\dagger|\\ddagger|\\amalg|\\cap|\\cup|\\uplus|\\sqcap|\\sqcup|\\vee|\\wedge|\\oplus|\\ominus|\\otimes|\\circ|\\bullet|\\diamond|\\lhd|\\rhd|\\unlhd|\\unrhd|\\oslash|\\odot|\\bigcirc|\\Box|\\Diamond|\\bigtriangleup|\\bigtriangledown|\\triangleleft|\\triangleright|\\setminus|\\wr)/1/g;
4370: $garbage=~s/(\\le|\\ll|\\leq|\\ge|\\geq|\\gg|\\neq|\\doreq|\\sim|\\simeq|\\subset|\\subseteq|\\sqsubset|\\sqsubseteq|\\in|\\vdash|\\models|\\supset|\\supseteq|\\sqsupset|\\sqsupseteq|\\ni|\\dash|\\perp|\\approx|\\cong|\\equiv|\\propto|\\prec|\\preceq|\\parallel|\\asymp|\\smile|\\frown|\\bowtie|\\succ|\\succeq|\\mid)/1/g;
4371: $garbage=~s/(\\not<|\\\\not\\le|\\not\\prec|\\not\\preceq|\\not\\subset|\\not\\subseteq|\\not\\sqsubseteq|\\not\\in|\\not>|\\not\\ge|\\not\\succ|\\notsucceq|\\not\\supset|\\notsupseteq|\\not\\sqsupseteq|\\notin|\\not=|\\not\\equiv|\\not\\sim|\\not\\simeq|\\not\\approx|\\not\\cong|\\not\\asymp)/1/g;
4372: $garbage=~s/(\\leftarrow|\\gets|\\Leftarrow|\\rightarrow|\\to|\\Rightarrow|\\leftrightarrow|\\Leftrightarrow|\\mapsto|\\hookleftarrow|\\leftharpoonup|\\leftkarpoondown|\\rightleftharpoons|\\longleftarrow|\\Longleftarrow|\\longrightarrow|\\Longrightarrow|\\longleftrightarrow|\\Longleftrightarrow|\\longmapsto|\\hookrightarrow|\\rightharpoonup|\\rightharpoondown|\\uparrow|\\Uparrow|\\downarrow|\\Downarrow|\\updownarrow|\\Updownarrow|\\nearrow|\\searrow|\\swarrow|\\nwarrow)/11/g;
4373: $garbage=~s/(\\aleph|\\hbar|\\imath|\\jmath|\\ell|\\wp|\\Re|\\Im|\\mho|\\prime|\\emptyset|\\nabla|\\surd|\\partial|\\top|\\bot|\\vdash|\\dashv|\\forall|\\exists|\\neg|\\flat|\\natural|\\sharp|\\\||\\angle|\\backslash|\\Box|\\Diamond|\\triangle|\\clubsuit|\\diamondsuit|\\heartsuit|\\spadesuit|\\Join|\\infty)/11/g;
4374: $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
4375: #remove some other LaTeX command
4376: $garbage=~s|\\(\w+)\\|\\|g;
4377: $garbage=~s|\\(\w+)(\s*)|$2|g;
4378: $garbage=~s|\+|11|g;
4379: my $value=length($garbage);
4380: return $value;
4381: }
4382:
4383:
4384: # is_inside_of $tagstack $tag
4385: # This sub returns true if the current state of Xml processing
4386: # is inside of the tag.
4387: # Parameters:
4388: # tagstack - The tagstack from the parser.
4389: # tag - The tag (without the <>'s.).
4390: # Sample usage:
4391: # if (is_inside_of($tagstack "table")) {
4392: # # I'm in a table....
4393: # }
4394: sub is_inside_of {
4395: my ($tagstack, $tag) = @_;
4396: my @stack = @$tagstack;
4397: for (my $i = ($#stack - 1); $i >= 0; $i--) {
4398: if ($stack[$i] eq $tag) {
4399: return 1;
4400: }
4401: }
4402: return 0;
4403: }
4404:
4405:
4406: 1;
4407: __END__
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