1: # The LearningOnline Network with CAPA
2: # tags that create controlled output
3: #
4: # $Id: outputtags.pm,v 1.53 2008/11/18 19:14:28 jms 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: =head1 NAME
30:
31: Apache::outputtags;
32:
33: =head1 SYNOPSIS
34:
35: Handles tags associated with output. Seems to
36: relate to due dates of the assignment.
37:
38: This is part of the LearningOnline Network with CAPA project
39: described at http://www.lon-capa.org.
40:
41: =head1 SUBROUTINES
42:
43: =over
44:
45: =item start_displayduedate()
46:
47: =item initialize_outputtags()
48:
49: Empties the hash of tags that have already been displayed that should only be displayed once.
50:
51: =item end_displayduedate()
52:
53: =item start_displaytitle()
54:
55: =item end_displaytitle()
56:
57: =item multipart()
58:
59: =item start_displayweight()
60:
61: =item end_displayweight()
62:
63: =item start_displaystudentphoto()
64:
65: =item end_displaystudentphoto()
66:
67:
68: =back
69:
70: =cut
71:
72: package Apache::outputtags;
73:
74: use strict;
75: use Apache::lonlocal;
76: use Apache::lonnet;
77: use POSIX qw(strftime);
78:
79: BEGIN {
80: &Apache::lonxml::register('Apache::outputtags',('displayduedate','displaytitle','displayweight','displaystudentphoto'));
81: }
82:
83: sub initialize_outputtags {
84: %Apache::outputtags::showonce=();
85: }
86:
87:
88: sub start_displayduedate {
89: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
90: my $result;
91:
92: # Different parts can have different due dates... so we keep a list
93: # of the parts for which we've displayed the duedate:
94:
95: if (exists($Apache::outputtags::showonce{'displayduedate'})) {
96: if (grep(/^\Q$Apache::inputtags::part\E$/,
97: @{$Apache::outputtags::showonce{'displayduedate'}})) {
98: return ''; # Already shown the duedate for this part.
99: }
100: }
101: # since we will show the duedate for this part, remember it.
102:
103: push (@{$Apache::outputtags::showonce{'displayduedate'}},
104: $Apache::inputtags::part);
105:
106: # Determine the due date format:
107: #
108: my $status=$Apache::inputtags::status['-1'];
109: &Apache::lonxml::debug("got a $status in duedatebox");
110: my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
111: my $format = &Apache::lonxml::get_param('format', $parstack, $safeeval);
112: if (!$format) {
113: $format = undef;
114: }
115: if (($status =~ /CAN.*_ANSWER/)) {
116: my $id = $Apache::inputtags::part;
117: my $date = &Apache::lonhomework::due_date($id);
118: &Apache::lonxml::debug("duedatebox found $date for $id");
119:
120: # Only show the due date if the current date is
121: # different from due date of the previous part. I think
122: # this is probably the best way to avoid due date clutter.
123:
124: my $showduedate = 1;
125: my $part_count = scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
126: if ($part_count > 1) {
127: my $prev_part_id = $Apache::outputtags::showonce{'displayduedate'}->[$part_count-2];
128: my $prev_due_date = &Apache::lonnet::EXT("resource.$prev_part_id.duedate");
129: if ($prev_due_date == $date) {
130: $showduedate = 0;
131: }
132: }
133:
134: if ($showduedate) {
135: my $duetext = &Apache::lonnavmaps::timeToHumanString($date, '', $format);
136: if ($target eq 'web') {
137: if (lc($style) !~ 'plain') {
138: $result ='<table border="on"><tr><td>Due '.$duetext.'</td></tr></table>';
139: } else {
140: $result=&mt('Due').' '.$duetext;
141: }
142: } elsif ($target eq 'tex') {
143: # For TeX we'll make the duedate tag work exactly like the
144: # duedate tag for web.
145:
146: my $duetext = &Apache::lonnavmaps::timeToHumanString($date, '', $format);
147: if (lc($style) !~ 'plain') {
148: # The due date will be put in a box.
149:
150: $result = '\framebox{'
151: .&mt('Due').' '.$duetext.'}';
152: } else {
153: $result = &mt('Due') . ' '.$duetext;
154: }
155: }
156: }
157:
158: }
159: if ( $target eq 'edit' ) {
160: $result=&Apache::edit::tag_start($target,$token);
161: $result.='</td></tr>';
162: $result.=&Apache::edit::end_table();
163:
164: }
165: return $result;
166: }
167:
168: sub end_displayduedate {
169: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
170: my @result;
171: if ($target eq 'edit') { $result[1]='no'; }
172: return @result;
173: }
174:
175: sub start_displaytitle {
176: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
177: my $result='';
178: if (exists($Apache::outputtags::showonce{'displayduetitle'})) {
179: return '';
180: } else {
181: $Apache::outputtags::showonce{'displayduetitle'}=1;
182: }
183: my $name=&Apache::structuretags::get_resource_name();
184: my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
185: if ($target eq 'web') {
186: $result=$name;
187: if (lc($style) !~ 'plain') { $result="<h1>$name</h1>"; }
188: } elsif ($target eq 'edit') {
189: $result=&Apache::edit::tag_start($target,$token);
190: $result.='</td></tr>';
191: $result.=&Apache::edit::end_table();
192: } elsif ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
193: $name=&Apache::lonxml::latex_special_symbols($name);
194: if (lc($style) !~ 'plain') {
195: $result='\vskip 0 mm\noindent\textbf{'.$name.'}\vskip 0 mm';
196: } else {
197: $result=$name;
198: }
199: }
200: return $result;
201: }
202:
203: sub end_displaytitle {
204: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
205: my @result;
206: if ($target eq 'edit') { $result[1]='no'; }
207: return @result;
208: }
209:
210: sub multipart {
211: my ($uri)=@_;
212: if (!defined($uri)) { $uri=$env{'request.uri'}; }
213: my ($symb)=&Apache::lonnet::whichuser();
214:
215: my @parts;
216: my $metadata = &Apache::lonnet::metadata($uri,'packages');
217: foreach (split(/\,/,$metadata)) {
218: if ($_ =~ /^part_(.*)$/) {
219: my $part = $1;
220: if ($part ne '0'
221: && !&Apache::loncommon::check_if_partid_hidden($part,
222: $symb)) {
223: push(@parts,$part);
224: }
225: }
226: }
227: return @parts;
228: }
229:
230: sub start_displayweight {
231: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
232: my $result;
233: if (exists($Apache::outputtags::showonce{'displayweight'})) {
234: if(grep(/^\Q$Apache::inputtags::part\E$/,
235: @{$Apache::outputtags::showonce{'displayweight'}})) {
236: return '';
237: }
238: }
239: push(@{$Apache::outputtags::showonce{'displayweight'}},
240: $Apache::inputtags::part);
241: if ($target eq 'web' || $target eq 'tex') {
242: my $id = $Apache::inputtags::part;
243: if ($id ne '0') {
244: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
245: if (!defined($weight) || ($weight eq '')) { $weight=1; }
246: $result.=$weight;
247: } else {
248: my @parts=&multipart($env{'request.uri'});
249: my $weight;
250: if (@parts) {
251: foreach my $part (@parts) {
252: my $pweight=&Apache::lonnet::EXT("resource.$part.weight");
253: if (!defined($pweight) || ($pweight eq '')) { $pweight=1; }
254: $weight+=$pweight;
255: }
256: } else {
257: $weight = &Apache::lonnet::EXT("resource.$id.weight");
258: if (!defined($weight) || ($weight eq '')) { $weight=1; }
259: }
260: $result=$weight;
261: }
262: } elsif ( $target eq 'edit' ) {
263: $result=&Apache::edit::tag_start($target,$token);
264: $result.='</td></tr>';
265: $result.=&Apache::edit::end_table();
266: }
267: return $result;
268: }
269:
270: sub end_displayweight {
271: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
272: my @result;
273: if ($target eq 'edit') { $result[1]='no'; }
274: return @result;
275: }
276:
277: sub start_displaystudentphoto {
278: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
279: my $result;
280: my (undef,undef,$domain,$user) = &Apache::lonnet::whichuser();
281: if ($target eq 'web' && $user eq $env{'user.name'}) {
282: my $url=&Apache::lonnet::studentphoto($domain,$user,"gif");
283: my $args;
284: my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval);
285: if ($width) { $args.=" width=\"$width\" "; }
286: my $height=&Apache::lonxml::get_param('heigth',$parstack,$safeeval);
287: if ($height) { $args.=" height=\"$height\" "; }
288: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval);
289: if ($align) { $args.=" align=\"$align\" "; }
290: $result.=" <img $args src=\"$url\" alt=\"$user\@$domain\" />";
291: }
292: if ($target eq 'tex' && $env{'request.role'} =~ /^cc/) {
293: my $url=&Apache::lonnet::studentphoto($domain,$user,"eps");
294: my $ua=new LWP::UserAgent;
295: my $request=new HTTP::Request('GET',$url);
296: my $response=$ua->request($request);
297: if ($response->is_success) {
298: my $file=$user."_".$domain."_studentphoto.eps";
299: open(FILE,">".$Apache::lonnet::perlvar{'lonPrtDir'}."/$file");
300: print FILE $response->content;
301: close(FILE);
302: my $width_param=&Apache::londefdef::image_size($Apache::lonnet::perlvar{'lonPrtDir'}."/$file",'0.3',$parstack,$safeeval);
303: $result.=' \graphicspath{{'.$Apache::lonnet::perlvar{'lonPrtDir'}.
304: '}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
305: } else {
306: $result="$user\@$domain";
307: }
308: }
309: return $result;
310: }
311:
312: sub end_displaystudentphoto {
313: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
314: my @result;
315: if ($target eq 'edit') { $result[1]='no'; }
316: return @result;
317: }
318:
319: 1;
320: __END__
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