1: # The LearningOnline Network with CAPA
2: # <script> definiton
3: #
4: # $Id: scripttag.pm,v 1.160 2011/12/19 01:49:32 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::scripttag;
30:
31: use strict;
32: use Apache::lonnet;
33: use Apache::lonlocal;
34: use Apache::style();
35:
36: #Globals
37: # this used to pass around the standard callsub arguments to a tag func
38: # so xmlparse can reenter the inner_xmlparse loop.
39:
40: @Apache::scripttag::parser_env = ();
41: BEGIN {
42: &Apache::lonxml::register('Apache::scripttag',
43: ('script','scriptlib','parserlib','import',
44: 'window','display','storetc','physnet',
45: 'standalone','comment','num','parse','algebra',
46: 'LONCAPA_INTERNAL_TURN_STYLE_ON',
47: 'LONCAPA_INTERNAL_TURN_STYLE_OFF'));
48: }
49:
50: sub start_LONCAPA_INTERNAL_TURN_STYLE_ON {
51: $Apache::lonxml::usestyle=1;
52: $Apache::lonxml::style_values='';
53: return ('','no');
54: }
55:
56: sub end_LONCAPA_INTERNAL_TURN_STYLE_ON {
57: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
58: my $end=&Apache::lonxml::get_param('end',$parstack,$safeeval);
59: if (defined($end)) {
60: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
61: }
62: return ('','no');
63: }
64:
65: sub start_LONCAPA_INTERNAL_TURN_STYLE_OFF {
66: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
67: $Apache::lonxml::usestyle=0;
68: my $end=&Apache::lonxml::get_param('end',$parstack,$safeeval);
69: if (!$end) {
70: $Apache::lonxml::style_values=$$parstack[-1];
71: $Apache::lonxml::style_end_values=$$parstack[-1];
72: } else {
73: $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
74: $Apache::lonxml::style_end_values='';
75: }
76: return ('','no');
77: }
78:
79: sub end_LONCAPA_INTERNAL_TURN_STYLE_OFF {
80: return ('','no');
81: }
82:
83: sub start_script {
84: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
85: @Apache::scripttag::parser_env = @_;
86: my $result='';
87: my $type= &Apache::lonxml::get_param('type',$parstack,$safeeval);
88: &Apache::lonxml::debug("found type of $type");
89: if ($type eq "loncapa/perl") {
90: if ( $target eq "modified" ) {
91: $result=$token->[4].&Apache::edit::modifiedfield('/script',$parser);
92: } elsif ( $target eq 'web' || $target eq 'tex' ||
93: $target eq 'grade' || $target eq 'webgrade' ||
94: $target eq 'answer' || $target eq 'analyze' ) {
95: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
96: if (!$Apache::lonxml::default_homework_loaded) {
97: &Apache::lonxml::default_homework_load($safeeval);
98: }
99: &Apache::run::run($bodytext,$safeeval);
100: if (($target eq 'answer') &&
101: ($env{'form.answer_output_mode'} ne 'tex') &&
102: ($Apache::lonhomework::viewgrades == 'F')) {
103: $Apache::lonxml::evaluate--;
104: my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
105: $uname =~s/\W//g;
106: $udom =~s/\W//g;
107: my $function_name =
108: join('_','LONCAPA_scriptvars',$uname,$udom,
109: $env{'form.counter'},$Apache::lonxml::curdepth);
110: &Apache::lonxml::add_script_result(
111: &Apache::loncommon::modal_adhoc_window($function_name,500,500,
112: '<pre>'.&Apache::run::dump($target,$safeeval).'</pre>',
113: &mt('Script Vars'))."<br />");
114: }
115: } elsif ($target eq "edit" ) {
116: #&Apache::run::run($bodytext,$safeeval);
117: #$result="<br /> <$token->[1]> output: <br />$bodytext<br />Source:<br />";
118: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
119: $result=&Apache::edit::tag_start($target,$token,'Script');
120: $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4);
121: } elsif ($target eq 'meta') {
122: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
123: }
124: } else {
125: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
126: if ($target ne "meta" && $target ne 'tex' && $target ne 'answer') {
127: $result = $token->[4];
128: $result.=$bodytext;
129: }
130: }
131: return $result;
132: }
133:
134: sub end_script {
135: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
136: if ( $target eq "meta" ) { return ''; }
137: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
138: my $result='';
139: #other script blocks need to survive
140: if ($type ne "loncapa/perl" && $target ne 'tex') {
141: return $token->[2];
142: } elsif ($target eq 'edit' ) {
143: return &Apache::edit::end_table();
144: } elsif ($target eq 'answer') {
145: $Apache::lonxml::evaluate++;
146: }
147: return '';
148: }
149:
150: sub start_display {
151: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
152: @Apache::scripttag::parser_env = @_;
153: my $result;
154:
155: if ( $target eq "modified" ) {
156: $result=$token->[4].&Apache::edit::modifiedfield("/display",$parser);
157: } elsif ( $target eq 'web' || $target eq 'tex' ||
158: $target eq 'grade' || $target eq 'webgrade' ||
159: $target eq 'answer' || $target eq 'analyze') {
160: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
161: if (!$Apache::lonxml::default_homework_loaded) {
162: &Apache::lonxml::default_homework_load($safeeval);
163: }
164: $result=&Apache::run::run($bodytext,$safeeval);
165: if ($target eq 'grade' || $target eq 'answer' ||
166: $target eq 'analyze') {
167: # grade/answer/analyxe should produce no output but if we
168: # are redirecting, the redirecter should know what to do
169: # with the output
170: if (!$Apache::lonxml::redirection) { $result=''; }
171: }
172: $Apache::lonxml::post_evaluate=0;
173: } elsif ($target eq "edit" ) {
174: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
175: #$result =
176: # "<br /> <$token->[1]> output: <br />$bodytext<br />Source:<br />";
177: #$result.=&Apache::edit::editfield($token->[1],$bodytext,'',40,1);
178: $result=&Apache::edit::tag_start($target,$token,'Script With Display');
179: $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,1)
180: } elsif ($target eq 'meta') {
181: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
182: }
183: return $result;
184: }
185:
186: sub end_display {
187: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
188: if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
189: return '';
190: }
191:
192: sub start_scriptlib {
193: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
194: my $bodytext;
195: my $result ='';
196: my $error='';
197:
198: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
199: $target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
200: $target eq 'analyze' || $target eq 'webgrade') {
201: $bodytext=$$parser[$#$parser]->get_text("/scriptlib");
202: $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
203: $$parstack[$#$parstack]);
204: my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
205: $bodytext);
206: my $script=&Apache::lonnet::getfile($location);
207: if ($script == -1) {
208: if ($target eq 'edit') {
209: $error='</tr><tr><td>'.&mt('Errors').'</td><td colspan="2"><b>'.&mt(' Unable to find [_1]','<span class="LC_filename">'.$location.'</span>').'</b></td>'."\n";
210: } else {
211: &Apache::lonxml::error("<b> Unable to find <i>$location</i> for scriptlib</b>");
212: return "";
213: }
214: }
215: &Apache::run::run($script,$safeeval);
216: #&Apache::lonxml::debug("ran $bodytext:<br />".&Apache::lonnet::getfile($bodytext)."<br />");
217: }
218: if ($target eq "edit" ) {
219: $result=
220: &Apache::edit::tag_start($target,$token,'New Script Functions').
221: &Apache::edit::editline($token->[1],$bodytext,'scriptlib',40).
222: &Apache::edit::browse(undef,'textnode').
223: $error.'</td></tr>'.
224: &Apache::edit::end_table();
225: }
226: if ($target eq "modified" ) {
227: $result=$token->[4].&Apache::edit::modifiedfield("/scriptlib",$parser);
228: }
229: return $result;
230: }
231:
232: sub end_scriptlib {
233: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
234: my @result;
235: if ($target eq "edit" ) { $result[1]='no'; }
236: return @result;
237: }
238:
239: sub start_parserlib {
240: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
241: my $bodytext;
242: my $result ="";
243: my $error='';
244: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
245: $target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
246: $target eq 'analyze' || $target eq 'webgrade') {
247: $bodytext=$$parser[$#$parser]->get_text("/parserlib");
248: $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
249: $$parstack[$#$parstack]);
250: my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
251: $bodytext);
252: my $styletext=&Apache::lonnet::getfile($location);
253: #&Apache::lonxml::debug("found :$bodytext: in :$location: with :$styletext:");
254: if ($styletext == -1) {
255: if ($target eq 'edit') {
256: $error='</tr><tr><td>Errors</td><td colspan="2"><b> Unable to find <i>'.$location.'</i></b></td>'."\n";
257: } else {
258: &Apache::lonxml::error("<b> Unable to find <i>$location</i> for parserlib</b>");
259: return "";
260: }
261: }
262: %$style = ( %$style , &Apache::style::styleparser($target,$styletext));
263: }
264: if ($target eq "edit" ) {
265: $result=
266: &Apache::edit::tag_start($target,$token,'New Tag Definitions').
267: &Apache::edit::editline($token->[1],$bodytext,'',40).
268: $error.'</td></tr>'.
269: &Apache::edit::end_table();
270: }
271: if ($target eq "modified" ) {
272: $result=$token->[4].&Apache::edit::modifiedfield("/parserlib",$parser);
273: }
274: return $result;
275: }
276:
277: sub end_parserlib {
278: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
279: my @result;
280: if ($target eq "edit" ) { $result[1]='no'; }
281: return @result;
282: }
283:
284: sub start_window {
285: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
286: my $result = '';
287: if ($target eq 'web' || $target eq 'webgrade') {
288: &Apache::lonxml::startredirection;
289: } elsif ($target eq 'tex') {
290: $result = '\unskip\footnote{';
291: } elsif ($target eq 'edit') {
292: $result.=&Apache::edit::tag_start($target,$token);
293: $result.=&Apache::edit::text_arg('Text of Link:','linktext',$token,70);
294: $result.=&Apache::edit::text_arg('Height:','height',$token,5);
295: $result.=&Apache::edit::text_arg('Width:','width',$token,5);
296: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
297: } elsif ($target eq 'modified') {
298: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
299: $safeeval,'linktext',
300: 'width','height',
301: 'mimetype');
302: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
303: }
304: return $result;
305: }
306:
307: sub end_window {
308: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
309: my $result;
310: if ($target eq 'web' || $target eq 'webgrade') {
311: my $output=&Apache::lonxml::endredirection;
312: my $linktext= &Apache::lonxml::get_param('linktext',$parstack,$safeeval);
313: if (!$linktext) { $linktext='<sup>*</sup>'; }
314: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
315: if (!$width) { $width='500'; }
316: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
317: if (!$height) { $height='200'; }
318:
319: my ($start_page,$end_page);
320: $result=&Apache::loncommon::modal_adhoc_window
321: ("LONCAPA_newwindow_$Apache::lonxml::curdepth",$width,$height,$output,$linktext);
322: } elsif ($target eq 'tex') {
323: $result = '}';
324: } else {
325: $result = '';
326: }
327: return $result;
328: }
329:
330: sub start_import {
331: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
332: my $bodytext=$$parser[$#$parser]->get_text("/import");
333: my $result ="";
334:
335: $bodytext=&Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
336:
337: if ($target eq 'web' || $target eq 'webgrade' || $target eq 'grade'
338: || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze' ) {
339: # FIXME this probably needs to be smart about construction vs.
340: # non construction space.
341: my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
342: my $file=&Apache::lonnet::getfile($location);
343: if ($file == -1) {
344: &Apache::lonxml::error("<b> Unable to find <i>$bodytext as $location</i> for import</b>");
345: return "";
346: }
347: my $importmode=&Apache::lonxml::get_param('importmode',$parstack,$safeeval);
348: if (($importmode eq 'problem') || ($importmode eq 'part')) {
349: # We are using import to import published problems
350: if (($importmode eq 'problem') || ($file=~/<part[^<]*>/s)) {
351: # We explicitly don't want this to be a separate part or the problem already has parts
352: $file=~s/^\s*<problem>/<library>/s;
353: $file=~s/<\/problem>\s*$/<\/library>/s;
354: } else {
355: # We want this to be a separate part, but it currently is not
356: $file=~s/^\s*<problem>/<library><part>/s;
357: $file=~s/<\/problem>\s*$/<\/part><\/library>/s;
358: }
359: }
360: my $dir=$location;
361: $dir=~s:/[^/]*$::;
362: # &Apache::lonxml::debug("directory $dir $location file $file \n<b>END</b>\n");
363: my $id= &Apache::lonxml::get_id($parstack,$safeeval);
364: if (!$id) { $id=$Apache::lonxml::curdepth; }
365: push(@Apache::inputtags::import,$id);
366: push(@Apache::inputtags::importlist,$id);
367:
368: &Apache::lonxml::newparser($parser,\$file,$dir);
369:
370: } elsif ($target eq "edit" ) {
371: $result.=&Apache::edit::tag_start($target,$token);
372: my $location=$token->[1];
373: $location=~s/^\s*//s;
374: $location=~s/\s*$//s;
375: $result.=&Apache::edit::editline($location,$bodytext,'',40);
376: $result.=&Apache::edit::browse(undef,'textnode');
377: $result.= ' <label>'.&mt('Import as:').
378: '<select name="importmode_'.$Apache::lonxml::curdepth.'">';
379: my %options=&Apache::lonlocal::texthash('' => 'as standard library',
380: 'problem' => 'as problem',
381: 'part' => 'as problem part(s)');
382: foreach my $option (sort(keys(%options))) {
383: $result.='<option value="'.$option.'"';
384: if ($option eq &Apache::lonxml::get_param('importmode',$parstack,$safeeval)) {
385: $result.=' selected="selected"';
386: }
387: $result.='>'.$options{$option}.'</option>';
388: }
389: $result.='</select></label>';
390: #FIXME this need to convert $bodytext to be a contruction space reference
391: #my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
392: #$result.="Click<a href=\"$location\">here</a> to edit<br />"
393: } elsif ($target eq 'modified') {
394: &Apache::edit::get_new_args($token,$parstack,$safeeval,'importmode');
395: $result='<import id="'.$token->[2]{'id'}.'" importmode="'.$token->[2]{'importmode'}.'">';
396: $result.=&Apache::edit::modifiedfield("/import",$parser);
397: } elsif ($target eq 'meta') {
398: my $id= &Apache::lonxml::get_id($parstack,$safeeval);
399: $result.='<import part="'.$Apache::inputtags::part;
400: if ($id) {
401: $result.='" id="'.$id;
402: }
403: $result.='" importmode="'.$token->[2]{'importmode'}.'">';
404: $result.=$bodytext;
405: $result.='</import>';
406: }
407: return $result;
408: }
409:
410: sub end_import {
411: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
412: pop(@Apache::inputtags::import);
413: my $result;
414: if ($target eq 'edit' ) { $result=&Apache::edit::end_row.
415: &Apache::edit::end_table(); }
416: return $result;
417: }
418:
419: sub start_storetc {
420: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
421: my $result = '';
422: &Apache::lonxml::startredirection;
423: return $result;
424: }
425:
426: sub end_storetc {
427: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
428: my $result;
429: my $output=&Apache::lonxml::endredirection;
430: $output =~ s/\"/\"\;/g;
431: $result = '{\bf '.$output.'.}}\write\tcfile{\protect\tcpc{ '.$output.'.}{\the\value{relpage}}}';
432: return $result;
433: }
434:
435:
436: sub start_physnet {
437: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
438: my $bodytext = '/adm/includes/physnet.sty';
439: my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
440: my $cbistyletext=&Apache::lonnet::getfile($location);
441:
442: %$style = (%$style,&Apache::style::styleparser($target,$cbistyletext));
443: $$parser['-1']->unget_token($token);
444: # if ( defined($$style{'physnet'}) ) {
445: # &Apache::lonxml::newparser($parser,\$$style{'physnet'});
446: # }
447: return "";
448: }
449:
450: sub end_physnet {
451: return '';
452: }
453:
454: sub start_standalone {
455: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
456: my $result='';
457: if ($target eq 'web' || $target eq 'webgrade') {
458: if ( $env{'request.course.id'} ) {
459: my $inside = &Apache::lonxml::get_all_text("/standalone",$parser,$style);
460: } else {
461: $result='<table bgcolor="#E1E1E1" border="2"><tr><td>';
462: }
463: }
464: return $result;
465: }
466:
467: sub end_standalone {
468: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
469: my $result='';
470: if ($target eq 'web' || $target eq 'webgrade' ) {
471: if ( $env{'request.course.id'} ) {
472: } else {
473: $result='</td></tr></table>';
474: }
475: }
476: return $result;
477: }
478:
479: sub start_comment {
480: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
481: my $result='';
482: if ($target eq 'edit') {
483: $result=&Apache::edit::tag_start($target,$token);
484: my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
485: $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4)
486: } elsif ( $target eq 'modified') {
487: $result=$token->[4].&Apache::edit::modifiedfield("/comment",$parser);
488: } elsif ( $target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
489: $target eq 'answer' || $target eq 'meta' || $target eq 'analyze' ||
490: $target eq 'webgrade') {
491: #normally throw away comments
492: my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
493: }
494: return $result;
495: }
496:
497: sub end_comment {
498: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
499: if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
500: return '';
501: }
502:
503:
504: sub xmlparse {
505: my ($string) = @_;
506: &Apache::lonxml::debug("xmlparse recursion starting with $string");
507: # Apache::run::evaluate does an 'eval' on the name of the subroutine
508: # if it detects something that looks like a subroutine, this ends up calling
509: # things without any arguments and since perl is nice enough to pass
510: # along the default arguments when you don't explicitly say no arguments
511: # if you call &xmlparse, it gets &xmlparse passed as it argument.
512: # Same thing soccurs with &chemparse.
513: if ($string eq '&xmlparse') { return '&xmlparse'; }
514: if ($string eq '&chemparse') { return '&chemparse'; }
515: my ($target,$token,$tagstack,$parstack,$oldparser,$safeeval,$style)=
516: @Apache::scripttag::parser_env;
517: my @parser;
518: &Apache::lonxml::newparser(\@parser,\$string);
519: &Apache::lonxml::startredirection();
520: my $result=&Apache::lonxml::inner_xmlparse($target,$tagstack,
521: $parstack,\@parser,
522: $safeeval,$style);
523: $result.=&Apache::lonxml::endredirection();
524: &Apache::lonxml::debug("target is $target xmlparse recursion ending with $result");
525: return $result;
526: }
527:
528: sub start_num {
529: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
530: my $result = '';
531: my $inside = &Apache::lonxml::get_all_text_unbalanced("/num",$parser);
532: if ($target eq 'tex' || $target eq 'web' || $target eq 'webgrade') {
533: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
534: if (!$Apache::lonxml::default_homework_loaded) {
535: &Apache::lonxml::default_homework_load($safeeval);
536: }
537: @Apache::scripttag::parser_env = @_;
538: my $format=&Apache::lonxml::get_param('format',$parstack,$safeeval);
539: $result=&Apache::run::run("return &prettyprint(q\0$inside\0,q\0$format\0);",$safeeval);
540: }
541: return $result;
542: }
543:
544: sub end_num {
545: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
546: my $result = '';
547: return $result;
548: }
549:
550: sub start_parse {
551: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
552: my $result = '';
553: if ( $target eq 'web' || $target eq 'tex' ||
554: $target eq 'grade' || $target eq 'answer' ||
555: $target eq 'analyze'|| $target eq 'webgrade') {
556: my $inside = &Apache::lonxml::get_all_text_unbalanced("/parse",$parser);
557: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
558: if (!$Apache::lonxml::default_homework_loaded) {
559: &Apache::lonxml::default_homework_load($safeeval);
560: }
561: @Apache::scripttag::parser_env = @_;
562: $result=&Apache::run::run("return &xmlparse(q\0$inside\0);",$safeeval);
563: if ($target eq 'grade' || $target eq 'answer' ||
564: $target eq 'analyze') {
565: # grade/answer/analyxe should produce no output but if we
566: # are redirecting, the redirecter should know what to do
567: # with the output
568: if (!$Apache::lonxml::redirection) { $result=''; }
569: }
570: }
571: return $result;
572: }
573:
574: sub end_parse {
575: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
576: my $result = '';
577: return $result;
578: }
579:
580: sub start_algebra {
581: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
582: my $result = '';
583: if ( $target eq 'web' || $target eq 'tex' ||
584: $target eq 'grade' || $target eq 'answer' ||
585: $target eq 'analyze' || $target eq 'webgrade') {
586: my $inside = &Apache::lonxml::get_all_text_unbalanced("/algebra",$parser);
587: $inside = &Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
588: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
589: my $style=&Apache::lonxml::get_param('style',$parstack,$safeeval);
590: $result=&Apache::lontexconvert::algebra($inside,$target,$style,$parstack,$safeeval);
591: }
592: $Apache::lonxml::post_evaluate=0;
593: }
594: return $result;
595: }
596:
597: sub end_algebra {
598: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
599: my $result = '';
600: return $result;
601: }
602:
603: 1;
604: __END__
605:
606: =pod
607:
608: =head1 NAME
609:
610: Apache::scripttag.pm
611:
612: =head1 SYNOPSIS
613:
614: implements <script>, <scriptlib>, <parserlib>,
615: and <import>
616:
617: This is part of the LearningOnline Network with CAPA project
618: described at http://www.lon-capa.org.
619:
620: =cut
621:
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