1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.8 2001/12/04 15:17:56 albertel 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: # 7/20/2001 Isaac Tsai, initial syntax
29: # 8/10/2001 Isaac Tsai,
30: # 8/30/2001 Isaac Tsai,
31: # SYNTAX:
32: # <randomlabel bgimg="URL" width="12" height="45" texwidth="50">
33: # <labelgroup name="GroupOne" type="image">
34: # <location x="123" y="456" />
35: # <location x="321" y="654" />
36: # <location x="213" y="546" />
37: # <label description="TEXT-1">IMG-URL</label>
38: # <label description="TEXT-2">IMG-URL</label>
39: # <label description="TEXT-3">IMG-URL</label>
40: # </labelgroup>
41: # <labelgroup name="GroupTwo" type="text">
42: # <location x="12" y="45" />
43: # <location x="32" y="65" />
44: # <location x="21" y="54" />
45: # <label>TEXT-1</label>
46: # <label>TEXT-2</label>
47: # <label>TEXT-3</label>
48: # </labelgroup>
49: # </randomlabel>
50: # ===========================================
51: # side effect:
52: # location (123,456): $GroupOne[0] = 2 # images give out indexes
53: # (321,654): $GroupOne[1] = 1
54: # (213,546): $GroupOne[2] = 0
55: # location (12,45) : $GroupTwo[0] = "TEXT-3"
56: # (32,65) : $GroupTwo[1] = "TEXT-1"
57: # (21,54) : $GroupTwo[2] = "TEXT-2"
58: # ===========================================
59: package Apache::randomlabel;
60: use strict;
61:
62: sub BEGIN {
63: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
64: }
65:
66: sub start_randomlabel {
67: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
68: my $result='';
69: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
70: '/res/adm/includes/GLabel.class';
71:
72: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
73:
74: if ( $bgimg !~ /^http:/ ) {
75: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$bgimg;
76: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
77: if ($bgimg =~ /$Apache::lonnet::perlvar{'lonDocRoot'}/) {
78: $bgimg=~s/$Apache::lonnet::perlvar{'lonDocRoot'}//;
79: } elsif ($bgimg =~ m:^/home/.*/public_html:) {
80: $bgimg =~ s:^/home/(.*)/public_html:/~$1:;
81: }
82: $bgimg="http://".$ENV{'SERVER_NAME'}.$bgimg;
83: }
84: my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
85: my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
86: my $w= &Apache::lonxml::get_param('width',$parstack,$safeeval);
87: my $h= &Apache::lonxml::get_param('height',$parstack,$safeeval);
88: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
89: if (!$code) { $code='GLabel.class'; }
90: if (!$codebase) { $codebase='/res/adm/includes/'; }
91: $Apache::randomlabel::tlabel_cnt=0;
92: $Apache::randomlabel::ilabel_cnt=0;
93: if ($target eq 'web') {
94: $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">";
95: $result.="<param name=\"bgimg\" value=\"$bgimg\">";
96: } elsif ($target eq 'tex') {
97: $bgimg=~s/(.gif|.jpg)$/.ps/;
98: $result.='\vspace*{2mm} \\ \noindent \epsfxsize='.$texwidth.' \epsffile{'.
99: $bgimg.'}\setlength{\unitlength}{1mm} \\ \begin{picture}(0,0)(0,-5)';
100: } elsif ($target eq 'edit') {
101: $result.=&Apache::edit::tag_start($target,$token);
102: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).'<br />'.
103: &Apache::edit::text_arg('Width(pixel):','width',$token,4).
104: &Apache::edit::text_arg('Height(pixel):','height',$token,4).
105: &Apache::edit::text_arg('TeXWidth(mm):','texwidth',$token,4).
106: '</td></tr><tr><td colspan="3">';
107: } elsif ($target eq 'modified') {
108: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
109: 'bgimg','width','height',
110: 'texwidth');
111: if ($constructtag) {
112: $result = &Apache::edit::rebuild_tag($token);
113: $result.=&Apache::edit::handle_insert();
114: }
115: }
116: return $result;
117: }
118:
119: sub end_randomlabel {
120: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
121: my $result='';
122: my $count;
123:
124:
125: if ($target eq 'web') {
126: $count = $Apache::randomlabel::tlabel_cnt;
127: if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
128: $count = $Apache::randomlabel::ilabel_cnt;
129: if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
130: $result .= "</applet><BR />";
131: } elsif ($target eq 'tex') {
132: $result='\end{picture}';
133: } elsif ($target eq 'edit') {
134: $result.=&Apache::edit::end_table;
135: }
136: return $result;
137: }
138:
139: sub start_labelgroup {
140: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
141: my $result='';
142: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
143: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
144: $type =~tr/A-Z/a-z/;
145: if ($target eq 'web' || $target eq 'tex' ||
146: $target eq 'grade' || $target eq 'answer') {
147: $Apache::randomlabel::groupname=$name;
148: $Apache::randomlabel::type=$type;
149: @Apache::randomlabel::xcoord = ();
150: @Apache::randomlabel::ycoord = ();
151: @Apache::randomlabel::value = ();
152: @Apache::randomlabel::label_arr = ();
153: } elsif ($target eq 'edit') {
154: $result.=&Apache::edit::tag_start($target,$token);
155: $result.=&Apache::edit::text_arg('Name:','name',$token).
156: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
157: '</td></tr><tr><td colspan="3">';
158: } elsif ($target eq 'modified') {
159: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
160: 'name','type');
161: if ($constructtag) {
162: $result = &Apache::edit::rebuild_tag($token);
163: $result.=&Apache::edit::handle_insert();
164: }
165: }
166: return $result;
167: }
168:
169: sub add_vars {
170: my ($name,$order,$label,$labelorder,$value,$safeeval) = @_;
171: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
172: my $out=Apache::run::run($code,$safeeval);
173: if ($value) {
174: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
175: $out=Apache::run::run($code,$safeeval);
176: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
177: $out=Apache::run::run($code,$safeeval);
178: }
179: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
180: $out=Apache::run::run($code,$safeeval);
181: }
182:
183: # begin to assign labels to locations
184: sub end_labelgroup {
185: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
186: my $gname = $Apache::randomlabel::groupname;
187: my $type = $Apache::randomlabel::type;
188: my $result='';
189: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
190: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
191: &Apache::structuretags::shuffle(\@idx_arr);
192: for(0 .. $#Apache::randomlabel::label_arr) {
193: my $str;
194: my $xstr;
195: my $ystr;
196: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
197: my $x = $Apache::randomlabel::xcoord[$_];
198: my $y = $Apache::randomlabel::ycoord[$_];
199: my $value = $Apache::randomlabel::value[$_];
200: if( $type eq 'text') {
201: &add_vars($gname,$_,$label,$idx_arr[$_],$value,$safeeval);
202: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
203: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
204: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
205: $Apache::randomlabel::tlabel_cnt += 1;
206: } elsif ( $type eq 'image') {
207: &add_vars($gname,$_,$idx_arr[$_],$idx_arr[$_],$value,$safeeval);
208: $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
209: $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
210: $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
211: $Apache::randomlabel::ilabel_cnt += 1;
212: } else {
213: &Apache::lonxml::error('Unknown type of label :'.$type.':');
214: }
215: if ($target eq 'web') {
216: $result .= '<param name="' . $str . '" value="'.$label.'">';
217: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
218: $result .= '<param name="' . $ystr . '" value="'.$y.'">';
219: }
220: }
221: } elsif ($target eq 'tex') {
222: my $WX1=0; # Web x-coord. of upper left corner (ULC)
223: my $WY1=0; # Web y-coord. of (ULC)
224: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
225: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
226: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
227: my $TX1=0;
228: my $TY1=$texwidth*($wheight/$wwidth);
229: my $TX2=$texwidth;
230: my $TY2=0;
231:
232:
233: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
234: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
235: my $cstx=$wwidth-$slopex*($TX2);
236: my $csty=$wheight-$slopey*($TY2);
237:
238: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
239: &Apache::structuretags::shuffle(\@idx_arr);
240:
241: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
242: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
243: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
244: my $x = $Apache::randomlabel::xcoord[$i];
245: my $y = $Apache::randomlabel::ycoord[$i];
246: my $value = $Apache::randomlabel::value[$i];
247: my $tcX=$x*($texwidth/$wwidth);
248: my $tcY=$TY1-$y*($TY1/$wheight)-2;
249: $tcX=sprintf('%.2f',$tcX);
250: $tcY=sprintf('%.2f',$tcY);
251: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
252: if( $type eq 'text') {
253: &add_vars($gname,$i,$label,$idx_arr[$i],$value,$safeeval);
254: } elsif ( $type eq 'image') {
255: &add_vars($gname,$i,$idx_arr[$i],$idx_arr[$i],$value,$safeeval);
256: } else {
257: &Apache::lonxml::error('Unknown type of label :'.$type.':');
258: }
259: }
260: } elsif ($target eq 'edit') {
261: $result.=&Apache::edit::end_table;
262: }
263: return $result;
264: }
265:
266: # <location x="123" y="456" value="some value"/>
267: sub start_location {
268: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
269: my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
270: my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
271: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
272: my $result='';
273: push(@Apache::randomlabel::xcoord,$x);
274: push(@Apache::randomlabel::ycoord,$y);
275: push(@Apache::randomlabel::value,$value);
276: if ($target eq 'edit') {
277: $result.=&Apache::edit::tag_start($target,$token);
278: $result.=&Apache::edit::text_arg('X:','x',$token,4).
279: &Apache::edit::text_arg('Y:','y',$token,4).
280: &Apache::edit::text_arg('Value:','value',$token).
281: '</td></tr><tr><td colspan="3">';
282: $result.=&Apache::edit::end_table;
283: } elsif ($target eq 'modified') {
284: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
285: 'x','y','value');
286: if ($constructtag) {
287: $result = &Apache::edit::rebuild_tag($token);
288: $result.=&Apache::edit::handle_insert();
289: }
290: }
291: return $result;
292: }
293:
294: sub end_location {
295: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
296: my @result;
297: if ($target eq 'edit') { @result=('','no') }
298: return @result;
299: }
300:
301: # <label>$var_abc</label>
302: sub start_label {
303: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
304: my $result='';
305: if ($target eq 'web' || $target eq 'tex' ||
306: $target eq 'grade' || $target eq 'answer') {
307: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
308: push(@Apache::randomlabel::label_arr,$ltext);
309: } elsif ($target eq 'edit') {
310: $result.=&Apache::edit::tag_start($target,$token);
311: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
312: $result.='</td></tr><tr><td colspan="3">'.
313: &Apache::edit::editfield('',$text,'',20,1).
314: &Apache::edit::end_table();
315: } elsif ($target eq 'modified') {
316: my $text=$$parser[-1]->get_text("/label");
317: $result.=&Apache::edit::modifiedfield($token);
318: }
319: return $result;
320: }
321:
322: sub end_label {
323: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
324: my @result;
325: if ($target eq 'edit') { @result=('','no') }
326: return @result;
327: }
328:
329:
330:
331: 1;
332: __END__
333:
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