1: # The LearningOnline Network with CAPA
2: # <script> definiton
3: #
4: # $Id: scripttag.pm,v 1.157 2010/08/08 03:00:56 raeburn 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: my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
106: my $start_page =
107: &Apache::loncommon::start_page('Script Vars', undef,
108: {'only_body' => 1,
109: 'bgcolor' => '#FFFFFF',
110: 'js_ready' => 1,});
111: my $end_page =
112: &Apache::loncommon::end_page({'js_ready' => 1,});
113:
114: $uname =~s/\W//g;
115: $udom =~s/\W//g;
116: my $function_name =
117: join('_','LONCAPA_scriptvars',$uname,$udom,
118: $env{'form.counter'},$Apache::lonxml::curdepth);
119: my $script_var ="<script type=\"text/javascript\">
120: // <![CDATA[
121: function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>";
122: my $listing=&Apache::run::dump($target,$safeeval);
123: $listing=~s/\\/\\\\/g;
124: $listing=~s/\'/\\\'/g;
125: $script_var.=$listing;
126: $script_var.= "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
127: // ]]>
128: </script><a href=\"javascript:$function_name();void(0);\">".&mt('Script Vars')."</a><br />";
129: &Apache::lonxml::add_script_result($script_var);
130: }
131: } elsif ($target eq "edit" ) {
132: #&Apache::run::run($bodytext,$safeeval);
133: #$result="<br /> <$token->[1]> output: <br />$bodytext<br />Source:<br />";
134: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
135: $result=&Apache::edit::tag_start($target,$token,'Script');
136: $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4);
137: } elsif ($target eq 'meta') {
138: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
139: }
140: } else {
141: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
142: if ($target ne "meta" && $target ne 'tex' && $target ne 'answer') {
143: $result = $token->[4];
144: $result.=$bodytext;
145: }
146: }
147: return $result;
148: }
149:
150: sub end_script {
151: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
152: if ( $target eq "meta" ) { return ''; }
153: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
154: my $result='';
155: #other script blocks need to survive
156: if ($type ne "loncapa/perl" && $target ne 'tex') {
157: return $token->[2];
158: } elsif ($target eq 'edit' ) {
159: return &Apache::edit::end_table();
160: } elsif ($target eq 'answer') {
161: $Apache::lonxml::evaluate++;
162: }
163: return '';
164: }
165:
166: sub start_display {
167: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
168: @Apache::scripttag::parser_env = @_;
169: my $result;
170:
171: if ( $target eq "modified" ) {
172: $result=$token->[4].&Apache::edit::modifiedfield("/display",$parser);
173: } elsif ( $target eq 'web' || $target eq 'tex' ||
174: $target eq 'grade' || $target eq 'webgrade' ||
175: $target eq 'answer' || $target eq 'analyze') {
176: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
177: if (!$Apache::lonxml::default_homework_loaded) {
178: &Apache::lonxml::default_homework_load($safeeval);
179: }
180: $result=&Apache::run::run($bodytext,$safeeval);
181: if ($target eq 'grade' || $target eq 'answer' ||
182: $target eq 'analyze') {
183: # grade/answer/analyxe should produce no output but if we
184: # are redirecting, the redirecter should know what to do
185: # with the output
186: if (!$Apache::lonxml::redirection) { $result=''; }
187: }
188: $Apache::lonxml::post_evaluate=0;
189: } elsif ($target eq "edit" ) {
190: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
191: #$result =
192: # "<br /> <$token->[1]> output: <br />$bodytext<br />Source:<br />";
193: #$result.=&Apache::edit::editfield($token->[1],$bodytext,'',40,1);
194: $result=&Apache::edit::tag_start($target,$token,'Script With Display');
195: $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,1)
196: } elsif ($target eq 'meta') {
197: my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
198: }
199: return $result;
200: }
201:
202: sub end_display {
203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
204: if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
205: return '';
206: }
207:
208: sub start_scriptlib {
209: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
210: my $bodytext;
211: my $result ='';
212: my $error='';
213:
214: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
215: $target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
216: $target eq 'analyze' || $target eq 'webgrade') {
217: $bodytext=$$parser[$#$parser]->get_text("/scriptlib");
218: $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
219: $$parstack[$#$parstack]);
220: my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
221: $bodytext);
222: my $script=&Apache::lonnet::getfile($location);
223: if ($script == -1) {
224: if ($target eq 'edit') {
225: $error='</tr><tr><td>'.&mt('Errors').'</td><td colspan="2"><b>'.&mt(' Unable to find [_1]','<span class="LC_filename">'.$location.'</span>').'</b></td>'."\n";
226: } else {
227: &Apache::lonxml::error("<b> Unable to find <i>$location</i> for scriptlib</b>");
228: return "";
229: }
230: }
231: &Apache::run::run($script,$safeeval);
232: #&Apache::lonxml::debug("ran $bodytext:<br />".&Apache::lonnet::getfile($bodytext)."<br />");
233: }
234: if ($target eq "edit" ) {
235: $result=
236: &Apache::edit::tag_start($target,$token,'New Script Functions').
237: &Apache::edit::editline($token->[1],$bodytext,'scriptlib',40).
238: &Apache::edit::browse(undef,'textnode').
239: $error.'</td></tr>'.
240: &Apache::edit::end_table();
241: }
242: if ($target eq "modified" ) {
243: $result=$token->[4].&Apache::edit::modifiedfield("/scriptlib",$parser);
244: }
245: return $result;
246: }
247:
248: sub end_scriptlib {
249: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
250: my @result;
251: if ($target eq "edit" ) { $result[1]='no'; }
252: return @result;
253: }
254:
255: sub start_parserlib {
256: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
257: my $bodytext;
258: my $result ="";
259: my $error='';
260: if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
261: $target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
262: $target eq 'analyze' || $target eq 'webgrade') {
263: $bodytext=$$parser[$#$parser]->get_text("/parserlib");
264: $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
265: $$parstack[$#$parstack]);
266: my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
267: $bodytext);
268: my $styletext=&Apache::lonnet::getfile($location);
269: #&Apache::lonxml::debug("found :$bodytext: in :$location: with :$styletext:");
270: if ($styletext == -1) {
271: if ($target eq 'edit') {
272: $error='</tr><tr><td>Errors</td><td colspan="2"><b> Unable to find <i>'.$location.'</i></b></td>'."\n";
273: } else {
274: &Apache::lonxml::error("<b> Unable to find <i>$location</i> for parserlib</b>");
275: return "";
276: }
277: }
278: %$style = ( %$style , &Apache::style::styleparser($target,$styletext));
279: }
280: if ($target eq "edit" ) {
281: $result=
282: &Apache::edit::tag_start($target,$token,'New Tag Definitions').
283: &Apache::edit::editline($token->[1],$bodytext,'',40).
284: $error.'</td></tr>'.
285: &Apache::edit::end_table();
286: }
287: if ($target eq "modified" ) {
288: $result=$token->[4].&Apache::edit::modifiedfield("/parserlib",$parser);
289: }
290: return $result;
291: }
292:
293: sub end_parserlib {
294: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
295: my @result;
296: if ($target eq "edit" ) { $result[1]='no'; }
297: return @result;
298: }
299:
300: sub start_window {
301: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
302: my $result = '';
303: if ($target eq 'web' || $target eq 'webgrade') {
304: &Apache::lonxml::startredirection;
305: } elsif ($target eq 'tex') {
306: $result = '\unskip\footnote{';
307: } elsif ($target eq 'edit') {
308: $result.=&Apache::edit::tag_start($target,$token);
309: $result.=&Apache::edit::text_arg('Text of Link:','linktext',$token,70);
310: $result.=&Apache::edit::text_arg('Height:','height',$token,5);
311: $result.=&Apache::edit::text_arg('Width:','width',$token,5);
312: $result.=&Apache::edit::text_arg('Mime Type:','mimetype',$token,5);
313: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
314: } elsif ($target eq 'modified') {
315: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
316: $safeeval,'linktext',
317: 'width','height',
318: 'mimetype');
319: if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
320: }
321: return $result;
322: }
323:
324: sub end_window {
325: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
326: my $result;
327: if ($target eq 'web' || $target eq 'webgrade') {
328: my $output=&Apache::lonxml::endredirection;
329: $output =~ s/[\n\r]/ /g;
330: # $output = &HTML::Entities::encode($output,'<>&"\'');
331: $output =~ s/\'/\\\'/g;
332: my $linktext= &Apache::lonxml::get_param('linktext',$parstack,$safeeval);
333: if (!$linktext) { $linktext='<sup>*</sup>'; }
334: my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
335: if (!$width) { $width='500'; }
336: my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
337: if (!$height) { $height='200'; }
338: my $mimetype= &Apache::lonxml::get_param('mimetype',$parstack,$safeeval)
339: || 'text/html';
340:
341: my ($start_page,$end_page);
342: if ($mimetype eq 'text/html') {
343: $start_page =
344: &Apache::loncommon::start_page($linktext, undef,
345: {'only_body' => 1,
346: 'bgcolor' => '#FFFFFF',
347: 'js_ready' => 1,});
348: $end_page =
349: &Apache::loncommon::end_page({'js_ready' => 1,});
350: }
351: $result = "<script type=\"text/javascript\">
352: //<!--
353: function LONCAPA_newwindow_$Apache::lonxml::curdepth() {
354: newWindow=open(".&Apache::lonhtmlcommon::javascript_nothing().",'new_W');
355: newWindow.close();
356: newWindow=open(".&Apache::lonhtmlcommon::javascript_nothing().",'new_W','width=$width,height=$height,scrollbars=1');
357: newWindow.".&Apache::lonhtmlcommon::javascript_docopen($mimetype).";
358: newWindow.document.writeln('$start_page $output $end_page');
359: newWindow.document.close();}
360: //-->
361: </script><a href=\"javascript:LONCAPA_newwindow_$Apache::lonxml::curdepth();void(0);\">$linktext</a>";
362: } elsif ($target eq 'tex') {
363: $result = '}';
364: } else {
365: $result = '';
366: }
367: return $result;
368: }
369:
370: sub start_import {
371: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
372: my $bodytext=$$parser[$#$parser]->get_text("/import");
373: my $result ="";
374:
375: $bodytext=&Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
376:
377: if ($target eq 'web' || $target eq 'webgrade' || $target eq 'grade'
378: || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze' ) {
379: # FIXME this probably needs to be smart about construction vs.
380: # non construction space.
381: my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
382: my $file=&Apache::lonnet::getfile($location);
383: if ($file == -1) {
384: &Apache::lonxml::error("<b> Unable to find <i>$bodytext as $location</i> for import</b>");
385: return "";
386: }
387: my $importmode=&Apache::lonxml::get_param('importmode',$parstack,$safeeval);
388: if (($importmode eq 'problem') || ($importmode eq 'part')) {
389: # We are using import to import published problems
390: if (($importmode eq 'problem') || ($file=~/<part[^<]*>/s)) {
391: # We explicitly don't want this to be a separate part or the problem already has parts
392: $file=~s/^\s*<problem>/<library>/s;
393: $file=~s/<\/problem>\s*$/<\/library>/s;
394: } else {
395: # We want this to be a separate part, but it currently is not
396: $file=~s/^\s*<problem>/<library><part>/s;
397: $file=~s/<\/problem>\s*$/<\/part><\/library>/s;
398: }
399: }
400: my $dir=$location;
401: $dir=~s:/[^/]*$::;
402: # &Apache::lonxml::debug("directory $dir $location file $file \n<b>END</b>\n");
403: my $id= &Apache::lonxml::get_id($parstack,$safeeval);
404: if (!$id) { $id=$Apache::lonxml::curdepth; }
405: push(@Apache::inputtags::import,$id);
406: push(@Apache::inputtags::importlist,$id);
407:
408: &Apache::lonxml::newparser($parser,\$file,$dir);
409:
410: } elsif ($target eq "edit" ) {
411: $result.=&Apache::edit::tag_start($target,$token);
412: my $location=$token->[1];
413: $location=~s/^\s*//s;
414: $location=~s/\s*$//s;
415: $result.=&Apache::edit::editline($location,$bodytext,'',40);
416: $result.=&Apache::edit::browse(undef,'textnode');
417: $result.= ' <label>'.&mt('Import as:').
418: '<select name="importmode_'.$Apache::lonxml::curdepth.'">';
419: my %options=&Apache::lonlocal::texthash('' => 'as standard library',
420: 'problem' => 'as problem',
421: 'part' => 'as problem part(s)');
422: foreach my $option (sort(keys(%options))) {
423: $result.='<option value="'.$option.'"';
424: if ($option eq &Apache::lonxml::get_param('importmode',$parstack,$safeeval)) {
425: $result.=' selected="selected"';
426: }
427: $result.='>'.$options{$option}.'</option>';
428: }
429: $result.='</select></label>';
430: #FIXME this need to convert $bodytext to be a contruction space reference
431: #my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
432: #$result.="Click<a href=\"$location\">here</a> to edit<br />"
433: } elsif ($target eq 'modified') {
434: &Apache::edit::get_new_args($token,$parstack,$safeeval,'importmode');
435: $result='<import id="'.$token->[2]{'id'}.'" importmode="'.$token->[2]{'importmode'}.'">';
436: $result.=&Apache::edit::modifiedfield("/import",$parser);
437: } elsif ($target eq 'meta') {
438: my $id= &Apache::lonxml::get_id($parstack,$safeeval);
439: $result.='<import part="'.$Apache::inputtags::part;
440: if ($id) {
441: $result.='" id="'.$id;
442: }
443: $result.='" importmode="'.$token->[2]{'importmode'}.'">';
444: $result.=$bodytext;
445: $result.='</import>';
446: }
447: return $result;
448: }
449:
450: sub end_import {
451: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
452: pop(@Apache::inputtags::import);
453: my $result;
454: if ($target eq 'edit' ) { $result=&Apache::edit::end_row.
455: &Apache::edit::end_table(); }
456: return $result;
457: }
458:
459: sub start_storetc {
460: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
461: my $result = '';
462: &Apache::lonxml::startredirection;
463: return $result;
464: }
465:
466: sub end_storetc {
467: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
468: my $result;
469: my $output=&Apache::lonxml::endredirection;
470: $output =~ s/\"/\"\;/g;
471: $result = '{\bf '.$output.'.}}\write\tcfile{\protect\tcpc{ '.$output.'.}{\the\value{relpage}}}';
472: return $result;
473: }
474:
475:
476: sub start_physnet {
477: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
478: my $bodytext = '/adm/includes/physnet.sty';
479: my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
480: my $cbistyletext=&Apache::lonnet::getfile($location);
481:
482: %$style = (%$style,&Apache::style::styleparser($target,$cbistyletext));
483: $$parser['-1']->unget_token($token);
484: # if ( defined($$style{'physnet'}) ) {
485: # &Apache::lonxml::newparser($parser,\$$style{'physnet'});
486: # }
487: return "";
488: }
489:
490: sub end_physnet {
491: return '';
492: }
493:
494: sub start_standalone {
495: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
496: my $result='';
497: if ($target eq 'web' || $target eq 'webgrade') {
498: if ( $env{'request.course.id'} ) {
499: my $inside = &Apache::lonxml::get_all_text("/standalone",$parser,$style);
500: } else {
501: $result='<table bgcolor="#E1E1E1" border="2"><tr><td>';
502: }
503: }
504: return $result;
505: }
506:
507: sub end_standalone {
508: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
509: my $result='';
510: if ($target eq 'web' || $target eq 'webgrade' ) {
511: if ( $env{'request.course.id'} ) {
512: } else {
513: $result='</td></tr></table>';
514: }
515: }
516: return $result;
517: }
518:
519: sub start_comment {
520: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
521: my $result='';
522: if ($target eq 'edit') {
523: $result=&Apache::edit::tag_start($target,$token);
524: my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
525: $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4)
526: } elsif ( $target eq 'modified') {
527: $result=$token->[4].&Apache::edit::modifiedfield("/comment",$parser);
528: } elsif ( $target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
529: $target eq 'answer' || $target eq 'meta' || $target eq 'analyze' ||
530: $target eq 'webgrade') {
531: #normally throw away comments
532: my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
533: }
534: return $result;
535: }
536:
537: sub end_comment {
538: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
539: if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
540: return '';
541: }
542:
543:
544: sub xmlparse {
545: my ($string) = @_;
546: &Apache::lonxml::debug("xmlparse recursion starting with $string");
547: # Apache::run::evaluate does an 'eval' on the name of the subroutine
548: # if it detects something that looks like a subroutine, this ends up calling
549: # things without any arguments and since perl is nice enough to pass
550: # along the default arguments when you don't explicitly say no arguments
551: # if you call &xmlparse, it gets &xmlparse passed as it argument.
552: # Same thing soccurs with &chemparse.
553: if ($string eq '&xmlparse') { return '&xmlparse'; }
554: if ($string eq '&chemparse') { return '&chemparse'; }
555: my ($target,$token,$tagstack,$parstack,$oldparser,$safeeval,$style)=
556: @Apache::scripttag::parser_env;
557: my @parser;
558: &Apache::lonxml::newparser(\@parser,\$string);
559: &Apache::lonxml::startredirection();
560: my $result=&Apache::lonxml::inner_xmlparse($target,$tagstack,
561: $parstack,\@parser,
562: $safeeval,$style);
563: $result.=&Apache::lonxml::endredirection();
564: &Apache::lonxml::debug("target is $target xmlparse recursion ending with $result");
565: return $result;
566: }
567:
568: sub start_num {
569: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
570: my $result = '';
571: my $inside = &Apache::lonxml::get_all_text_unbalanced("/num",$parser);
572: if ($target eq 'tex' || $target eq 'web' || $target eq 'webgrade') {
573: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
574: if (!$Apache::lonxml::default_homework_loaded) {
575: &Apache::lonxml::default_homework_load($safeeval);
576: }
577: @Apache::scripttag::parser_env = @_;
578: my $format=&Apache::lonxml::get_param('format',$parstack,$safeeval);
579: $result=&Apache::run::run("return &prettyprint(q\0$inside\0,q\0$format\0);",$safeeval);
580: }
581: return $result;
582: }
583:
584: sub end_num {
585: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
586: my $result = '';
587: return $result;
588: }
589:
590: sub start_parse {
591: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
592: my $result = '';
593: if ( $target eq 'web' || $target eq 'tex' ||
594: $target eq 'grade' || $target eq 'answer' ||
595: $target eq 'analyze'|| $target eq 'webgrade') {
596: my $inside = &Apache::lonxml::get_all_text_unbalanced("/parse",$parser);
597: $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
598: if (!$Apache::lonxml::default_homework_loaded) {
599: &Apache::lonxml::default_homework_load($safeeval);
600: }
601: @Apache::scripttag::parser_env = @_;
602: $result=&Apache::run::run("return &xmlparse(q\0$inside\0);",$safeeval);
603: if ($target eq 'grade' || $target eq 'answer' ||
604: $target eq 'analyze') {
605: # grade/answer/analyxe should produce no output but if we
606: # are redirecting, the redirecter should know what to do
607: # with the output
608: if (!$Apache::lonxml::redirection) { $result=''; }
609: }
610: }
611: return $result;
612: }
613:
614: sub end_parse {
615: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
616: my $result = '';
617: return $result;
618: }
619:
620: sub start_algebra {
621: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
622: my $result = '';
623: if ( $target eq 'web' || $target eq 'tex' ||
624: $target eq 'grade' || $target eq 'answer' ||
625: $target eq 'analyze' || $target eq 'webgrade') {
626: my $inside = &Apache::lonxml::get_all_text_unbalanced("/algebra",$parser);
627: $inside = &Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
628: if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
629: my $style=&Apache::lonxml::get_param('style',$parstack,$safeeval);
630: $result=&Apache::lontexconvert::algebra($inside,$target,$style,$parstack,$safeeval);
631: }
632: $Apache::lonxml::post_evaluate=0;
633: }
634: return $result;
635: }
636:
637: sub end_algebra {
638: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
639: my $result = '';
640: return $result;
641: }
642:
643: 1;
644: __END__
645:
646: =pod
647:
648: =head1 NAME
649:
650: Apache::scripttag.pm
651:
652: =head1 SYNOPSIS
653:
654: implements <script>, <scriptlib>, <parserlib>,
655: and <import>
656:
657: This is part of the LearningOnline Network with CAPA project
658: described at http://www.lon-capa.org.
659:
660: =cut
661:
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