1: # The LearningOnline Network with CAPA
2: # tags that create controlled output
3: #
4: # $Id: outputtags.pm,v 1.43 2005/11/08 12:00:22 foxr 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::outputtags;
30:
31: use strict;
32: use Apache::lonlocal;
33: use Apache::lonnet;
34: use POSIX qw(strftime);
35:
36: BEGIN {
37: &Apache::lonxml::register('Apache::outputtags',('displayduedate','displaytitle','displayweight','displaystudentphoto'));
38: }
39: # Empties the hash of tags that have already been displayed
40: # that should only be displayed once.
41: #
42: sub initialize_outputtags {
43: %Apache::outputtags::showonce=();
44: }
45:
46:
47: sub start_displayduedate {
48: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
49: my $result;
50:
51: # Different parts can have different due dates... so we keep a list
52: # of the parts for which we've displayed the duedate:
53:
54: if (exists($Apache::outputtags::showonce{'displayduedate'})) {
55: if (grep(/^\Q$Apache::inputtags::part\E$/,
56: @{$Apache::outputtags::showonce{'displayduedate'}})) {
57: return ''; # Already shown the duedate for this part.
58: }
59: }
60: # since we will show the duedate for this part, remember it.
61:
62: push (@{$Apache::outputtags::showonce{'displayduedate'}},
63: $Apache::inputtags::part);
64:
65: # Determine the due date format:
66: #
67: my $status=$Apache::inputtags::status['-1'];
68: &Apache::lonxml::debug("got a $status in duedatebox");
69: my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
70: my $format = &Apache::lonxml::get_param('format', $parstack, $safeeval);
71: if (!$format) {
72: $format = '%c';
73: }
74: if (($status =~ /CAN.*_ANSWER/)) {
75: my $id = $Apache::inputtags::part;
76: my $date = &Apache::lonnet::EXT("resource.$id.duedate");
77: &Apache::lonxml::debug("duedatebox found $date for $id");
78:
79: # Only show the due date if the current date is
80: # different from due date of the previous part. I think
81: # this is probably the best way to avoid due date clutter.
82:
83: my $showduedate = 1;
84: my $part_count = scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
85: if ($part_count > 1) {
86: my $prev_part_id = $Apache::outputtags::showonce{'displayduedate'}->[$part_count-2];
87: my $prev_due_date = &Apache::lonnet::EXT("resource.$prev_part_id.duedate");
88: if ($prev_due_date == $date) {
89: $showduedate = 0;
90: }
91: }
92:
93: if ($showduedate) {
94: if ($target eq 'web') {
95: if (lc($style) !~ 'plain') {
96: $result ='<table border="on"><tr><td>Due '.
97: &Apache::lonnavmaps::timeToHumanString($date,'', $format).
98: '</td></tr></table>';
99: } else {
100: $result=&mt('Due').' '.&Apache::lonnavmaps::timeToHumanString($date);
101: }
102: } elsif ($target eq 'tex') {
103: }
104: }
105:
106: }
107: if ( $target eq 'edit' ) {
108: $result=&Apache::edit::tag_start($target,$token);
109: $result.='</td></tr>';
110: $result.=&Apache::edit::end_table();
111:
112: }
113: return $result;
114: }
115:
116: sub end_displayduedate {
117: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
118: my @result;
119: if ($target eq 'edit') { $result[1]='no'; }
120: return @result;
121: }
122:
123: sub start_displaytitle {
124: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
125: my $result='';
126: if (exists($Apache::outputtags::showonce{'displayduetitle'})) {
127: return '';
128: } else {
129: $Apache::outputtags::showonce{'displayduetitle'}=1;
130: }
131: my $name=&Apache::structuretags::get_resource_name();
132: my $style = &Apache::lonxml::get_param('style',$parstack,$safeeval);
133: if ($target eq 'web') {
134: $result=$name;
135: if (lc($style) !~ 'plain') { $result="<h1>$name</h1>"; }
136: } elsif ($target eq 'edit') {
137: $result=&Apache::edit::tag_start($target,$token);
138: $result.='</td></tr>';
139: $result.=&Apache::edit::end_table();
140: } elsif ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
141: $name=&Apache::lonxml::latex_special_symbols($name);
142: if (lc($style) !~ 'plain') {
143: $result='\vskip 0 mm\noindent\textbf{'.$name.'}\vskip 0 mm';
144: } else {
145: $result=$name;
146: }
147: }
148: return $result;
149: }
150:
151: sub end_displaytitle {
152: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
153: my @result;
154: if ($target eq 'edit') { $result[1]='no'; }
155: return @result;
156: }
157:
158: sub multipart {
159: my ($uri)=@_;
160: if (!defined($uri)) { $uri=$env{'request.uri'}; }
161: my @parts;
162: my $metadata = &Apache::lonnet::metadata($uri,'packages');
163: foreach (split(/\,/,$metadata)) {
164: if ($_ =~ /^part_(.*)$/) {
165: my $part = $1;
166: if ($part ne '0') { push(@parts,$part); }
167: }
168: }
169: return @parts;
170: }
171:
172: sub start_displayweight {
173: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
174: my $result;
175: if (exists($Apache::outputtags::showonce{'displayweight'})) {
176: if(grep(/^\Q$Apache::inputtags::part\E$/,
177: @{$Apache::outputtags::showonce{'displayweight'}})) {
178: return '';
179: }
180: }
181: push(@{$Apache::outputtags::showonce{'displayweight'}},
182: $Apache::inputtags::part);
183: if ($target eq 'web' || $target eq 'tex') {
184: my $id = $Apache::inputtags::part;
185: if ($id ne '0') {
186: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
187: if (!defined($weight) || ($weight eq '')) { $weight=1; }
188: $result.=$weight;
189: } else {
190: my @parts=&multipart($env{'request.uri'});
191: my $weight;
192: if (@parts) {
193: foreach my $part (@parts) {
194: my $pweight=&Apache::lonnet::EXT("resource.$part.weight");
195: if (!defined($pweight) || ($pweight eq '')) { $pweight=1; }
196: $weight+=$pweight;
197: }
198: } else {
199: $weight = &Apache::lonnet::EXT("resource.$id.weight");
200: if (!defined($weight) || ($weight eq '')) { $weight=1; }
201: }
202: $result=$weight;
203: }
204: } elsif ( $target eq 'edit' ) {
205: $result=&Apache::edit::tag_start($target,$token);
206: $result.='</td></tr>';
207: $result.=&Apache::edit::end_table();
208: }
209: return $result;
210: }
211:
212: sub end_displayweight {
213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
214: my @result;
215: if ($target eq 'edit') { $result[1]='no'; }
216: return @result;
217: }
218:
219: sub start_displaystudentphoto {
220: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
221: my $result;
222: my (undef,undef,$domain,$user) = &Apache::lonxml::whichuser();
223: if ($target eq 'web' && $user eq $env{'user.name'}) {
224: my $url=&Apache::lonnet::studentphoto($domain,$user,"gif");
225: my $args;
226: my $width=&Apache::lonxml::get_param('width',$parstack,$safeeval);
227: if ($width) { $args.=" width=\"$width\" "; }
228: my $height=&Apache::lonxml::get_param('heigth',$parstack,$safeeval);
229: if ($height) { $args.=" height=\"$height\" "; }
230: my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval);
231: if ($align) { $args.=" align=\"$align\" "; }
232: $result.=" <img $args src=\"$url\" alt=\"$user\@$domain\" />";
233: }
234: if ($target eq 'tex' && $env{'request.role'} =~ /^cc/) {
235: my $url=&Apache::lonnet::studentphoto($domain,$user,"eps");
236: my $ua=new LWP::UserAgent;
237: my $request=new HTTP::Request('GET',$url);
238: my $response=$ua->request($request);
239: if ($response->is_success) {
240: my $file=$user."_".$domain."_studentphoto.eps";
241: open(FILE,">".$Apache::lonnet::perlvar{'lonPrtDir'}."/$file");
242: print FILE $response->content;
243: close(FILE);
244: my $width_param=&Apache::londefdef::image_size($Apache::lonnet::perlvar{'lonPrtDir'}."/$file",'0.3',$parstack,$safeeval);
245: $result.=' \graphicspath{{'.$Apache::lonnet::perlvar{'lonPrtDir'}.
246: '}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
247: } else {
248: $result="$user\@$domain";
249: }
250: }
251: return $result;
252: }
253:
254: sub end_displaystudentphoto {
255: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
256: my @result;
257: if ($target eq 'edit') { $result[1]='no'; }
258: return @result;
259: }
260:
261: 1;
262: __END__
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