1: # The LearningOnline Network with CAPA
2: # tags that create controlled output
3: #
4: # $Id: outputtags.pm,v 1.59 2017/05/23 03:07:34 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:
30:
31: package Apache::outputtags;
32:
33: use strict;
34: use Apache::lonlocal;
35: use Apache::lonnet;
36: use LONCAPA::LWPReq;
37: use POSIX qw(strftime);
38:
39: BEGIN {
40: &Apache::lonxml::register('Apache::outputtags',('displayduedate','displaytitle','displayweight','displaystudentphoto'));
41: }
42:
43: ################################ utilities ###########################
44:
45: #
46: # Does a simple substitution of a tab when the opening tag can
47: # be replaced by a fixed string.. and same for the closing tag.
48: # Parameters:
49: # $input - String in in which to do the substitutions.
50: # $tag - name of tag without the <>'s e.g. sub for <sub></sub>
51: # $opening - What to replace <$tag> with
52: # $closing - What to replace </$tag> with.
53: # Returns:
54: # Input string appropriately substituted.
55: #
56: sub substitute_tag {
57: my ($input,
58: $tag,
59: $opening,
60: $closing) = @_;
61:
62: $input =~ s/<$tag>/$opening/gi;
63: $input =~ s/<\/$tag>/$closing/gi;
64:
65: return $input;
66: }
67:
68: #
69: # Substitutes the simple formatting tags in a string
70: # Parameters:
71: # $string - input string.
72: # Returns
73: # Result of string after simple substitutions
74: # Tags we handle are:
75: # <sub>, <sup> <em>
76: #
77: sub substitute_simple_tags_latex {
78: my ($string) = @_;
79:
80: # restore the <>'s:
81:
82: $string =~ s/\\ensuremath\{<}/</g;
83: $string =~ s/\\ensuremath\{>}/>/g;
84:
85:
86: # Substitute the tags:
87:
88: $string = &substitute_tag($string, "sub", '\ensuremath{_', '}');
89: $string = &substitute_tag($string, 'sup', '\ensuremath{^', '}');
90: $string = &substitute_tag($string, 'em', '\em{', '}');
91:
92:
93: # Escape the remaining <>'s again:
94:
95: $string =~ s/</\\ensuremath{<}/g;
96: $string =~ s/>/\\ensuremath{>}/g;
97:
98:
99:
100: return $string;
101: }
102:
103: ################################ The parser ##########################
104:
105: sub initialize_outputtags {
106: %Apache::outputtags::showonce=();
107: }
108:
109:
110:
111: sub start_displayduedate {
112: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
113: my $result;
114:
115: # Different parts can have different due dates... so we keep a list
116: # of the parts for which we've displayed the duedate:
117:
118: if (exists($Apache::outputtags::showonce{'displayduedate'})) {
119: if (grep(/^\Q$Apache::inputtags::part\E$/,
120: @{$Apache::outputtags::showonce{'displayduedate'}})) {
121: return ''; # Already shown the duedate for this part.
122: }
123: }
124: # since we will show the duedate for this part, remember it.
125:
126: push (@{$Apache::outputtags::showonce{'displayduedate'}},
127: $Apache::inputtags::part);
128:
129: # Determine the due date format:
130: #
131: my $status=$Apache::inputtags::status['-1'];
132: &Apache::lonxml::debug("got a $status in duedatebox");
133: my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
134: my $format = &Apache::lonxml::get_param('format', $parstack, $safeeval);
135: if (!$format) {
136: $format = undef;
137: }
138: if (($status =~ /CAN.*_ANSWER/)) {
139: my $id = $Apache::inputtags::part;
140: my $date = &Apache::lonhomework::due_date($id);
141: &Apache::lonxml::debug("duedatebox found $date for $id");
142:
143: # Only show the due date if the current date is
144: # different from due date of the previous part. I think
145: # this is probably the best way to avoid due date clutter.
146:
147: my $showduedate = 1;
148: my $part_count = scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
149: if ($part_count > 1) {
150: my $prev_part_id = $Apache::outputtags::showonce{'displayduedate'}->[$part_count-2];
151: my $prev_due_date = &Apache::lonnet::EXT("resource.$prev_part_id.duedate");
152: if ($prev_due_date == $date) {
153: $showduedate = 0;
154: }
155: }
156:
157: if ($showduedate) {
158: my $duetext = &Apache::lonnavmaps::timeToHumanString($date, '', $format);
159: if ($target eq 'web') {
160: if (lc($style) !~ 'plain') {
161: $result ='<table border="on"><tr><td>Due '.$duetext.'</td></tr></table>';
162: } else {
163: $result=&mt('Due').' '.$duetext;
164: }
165: } elsif ($target eq 'tex') {
166: # For TeX we'll make the duedate tag work exactly like the
167: # duedate tag for web.
168:
169: my $duetext = &Apache::lonnavmaps::timeToHumanString($date, '', $format);
170: if (lc($style) !~ 'plain') {
171: # The due date will be put in a box.
172: # at the start of the line to ensure it won't overlap
173: # the 1 col boundary.
174:
175: $result = '\vspace{1.0 ex} \framebox{'
176: .&mt('Due').' '.$duetext.'}';
177: } else {
178: $result = &mt('Due') . ' '.$duetext;
179: }
180: }
181: }
182:
183: }
184: if ( $target eq 'edit' ) {
185: $result=&Apache::edit::tag_start($target,$token);
186: $result.='</td></tr>';
187: $result.=&Apache::edit::end_table();
188:
189: }
190: return $result;
191: }
192:
193: sub end_displayduedate {
194: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
195: my @result;
196: if ($target eq 'edit') { $result[1]='no'; }
197: return @result;
198: }
199:
200: sub start_displaytitle {
201: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
202: my $result='';
203: if (exists($Apache::outputtags::showonce{'displayduetitle'})) {
204: return '';
205: } else {
206: $Apache::outputtags::showonce{'displayduetitle'}=1;
207: }
208: my $name=&Apache::structuretags::get_resource_name();
209: my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
210: if ($target eq 'web') {
211: $result=$name;
212: if (lc($style) !~ 'plain') { $result="<h1>$name</h1>"; }
213: } elsif ($target eq 'edit') {
214: $result=&Apache::edit::tag_start($target,$token);
215: $result.='</td></tr>';
216: $result.=&Apache::edit::end_table();
217: } elsif ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
218: $name=&Apache::lonxml::latex_special_symbols($name);
219: $name = &substitute_simple_tags_latex($name);
220: if (lc($style) !~ 'plain') {
221: $result='\vskip 0 mm\noindent\textbf{'.$name.'}\vskip 0 mm';
222: } else {
223: $result=$name;
224: }
225: }
226: return $result;
227: }
228:
229: sub end_displaytitle {
230: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
231: my @result;
232: if ($target eq 'edit') { $result[1]='no'; }
233: return @result;
234: }
235:
236: sub multipart {
237: my ($uri)=@_;
238: if (!defined($uri)) { $uri=$env{'request.uri'}; }
239: my ($symb)=&Apache::lonnet::whichuser();
240:
241: my @parts;
242: my $metadata = &Apache::lonnet::metadata($uri,'packages');
243: foreach (split(/\,/,$metadata)) {
244: if ($_ =~ /^part_(.*)$/) {
245: my $part = $1;
246: if ($part ne '0'
247: && !&Apache::loncommon::check_if_partid_hidden($part,
248: $symb)) {
249: push(@parts,$part);
250: }
251: }
252: }
253: return @parts;
254: }
255:
256: sub start_displayweight {
257: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
258: my $result;
259: if (exists($Apache::outputtags::showonce{'displayweight'})) {
260: if(grep(/^\Q$Apache::inputtags::part\E$/,
261: @{$Apache::outputtags::showonce{'displayweight'}})) {
262: return '';
263: }
264: }
265: push(@{$Apache::outputtags::showonce{'displayweight'}},
266: $Apache::inputtags::part);
267: if ($target eq 'web' || $target eq 'tex') {
268: my $id = $Apache::inputtags::part;
269: if ($id ne '0') {
270: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
271: if (!defined($weight) || ($weight eq '')) { $weight=1; }
272: $result.=$weight;
273: } else {
274: my @parts=&multipart($env{'request.uri'});
275: my $weight;
276: if (@parts) {
277: foreach my $part (@parts) {
278: my $pweight=&Apache::lonnet::EXT("resource.$part.weight");
279: if (!defined($pweight) || ($pweight eq '')) { $pweight=1; }
280: $weight+=$pweight;
281: }
282: } else {
283: $weight = &Apache::lonnet::EXT("resource.$id.weight");
284: if (!defined($weight) || ($weight eq '')) { $weight=1; }
285: }
286: $result=$weight;
287: }
288: } elsif ( $target eq 'edit' ) {
289: $result=&Apache::edit::tag_start($target,$token);
290: $result.='</td></tr>';
291: $result.=&Apache::edit::end_table();
292: }
293: return $result;
294: }
295:
296: sub end_displayweight {
297: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
298: my @result;
299: if ($target eq 'edit') { $result[1]='no'; }
300: return @result;
301: }
302:
303: sub start_displaystudentphoto {
304: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
305: my $result;
306: my (undef,undef,$domain,$user) = &Apache::lonnet::whichuser();
307: if ($target eq 'web' && $user eq $env{'user.name'}) {
308: my $url=&Apache::lonnet::studentphoto($domain,$user,"gif");
309: my $args;
310: my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval);
311: if ($width) { $args.=" width=\"$width\" "; }
312: my $height=&Apache::lonxml::get_param('heigth',$parstack,$safeeval);
313: if ($height) { $args.=" height=\"$height\" "; }
314: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval);
315: if ($align) { $args.=" align=\"$align\" "; }
316: $result.=" <img $args src=\"$url\" alt=\"$user\@$domain\" />";
317: }
318: if ($target eq 'tex' && $env{'request.role'} =~ /^cc/) {
319: my $url=&Apache::lonnet::studentphoto($domain,$user,"eps");
320: my $uhome=&Apache::lonnet::homeserver($user,$domain);
321: my $request=new HTTP::Request('GET',$url);
322: my $response=&LONCAPA::LWPReq::makerequest($uhome,$request,'','','',1);
323: my $response=$ua->request($request);
324: if ($response->is_success) {
325: my $file=$user."_".$domain."_studentphoto.eps";
326: open(FILE,">".$Apache::lonnet::perlvar{'lonPrtDir'}."/$file");
327: print FILE $response->content;
328: close(FILE);
329: my $width_param=&Apache::londefdef::image_size($Apache::lonnet::perlvar{'lonPrtDir'}."/$file",'0.3',$parstack,$safeeval);
330: $result.=' \graphicspath{{'.$Apache::lonnet::perlvar{'lonPrtDir'}.
331: '}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
332: } else {
333: $result="$user\@$domain";
334: }
335: }
336: return $result;
337: }
338:
339: sub end_displaystudentphoto {
340: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
341: my @result;
342: if ($target eq 'edit') { $result[1]='no'; }
343: return @result;
344: }
345:
346: 1;
347: __END__
348:
349:
350: =head1 NAME
351:
352: Apache::outputtags;
353:
354: =head1 SYNOPSIS
355:
356: Handles tags associated with output. Seems to
357: relate to due dates of the assignment.
358:
359: This is part of the LearningOnline Network with CAPA project
360: described at http://www.lon-capa.org.
361:
362: =head1 SUBROUTINES
363:
364: =over
365:
366: =item start_displayduedate()
367:
368: =item initialize_outputtags()
369:
370: Empties the hash of tags that have already been displayed that should only be displayed once.
371:
372: =item end_displayduedate()
373:
374: =item start_displaytitle()
375:
376: =item end_displaytitle()
377:
378: =item multipart()
379:
380: =item start_displayweight()
381:
382: =item end_displayweight()
383:
384: =item start_displaystudentphoto()
385:
386: =item end_displaystudentphoto()
387:
388:
389: =back
390:
391: =cut
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