1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.14 2002/02/14 21:37:26 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) : $GroupTwo[2] = "TEXT-2"
58: # ===========================================
59: package Apache::randomlabel;
60: use strict;
61: use Apache::edit;
62:
63: BEGIN {
64: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
65: }
66:
67: sub start_randomlabel {
68: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
69: my $result='';
70: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
71: '/res/adm/includes/GLabel.class';
72:
73: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
74:
75: if ( $bgimg !~ /^http:/ ) {
76: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$bgimg;
77: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
78: if ($bgimg =~ /$Apache::lonnet::perlvar{'lonDocRoot'}/) {
79: $bgimg=~s/$Apache::lonnet::perlvar{'lonDocRoot'}//;
80: } elsif ($bgimg =~ m:^/home/.*/public_html:) {
81: $bgimg =~ s:^/home/(.*)/public_html:/~$1:;
82: }
83: $bgimg="http://".$ENV{'SERVER_NAME'}.$bgimg;
84: }
85: my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
86: my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
87: my $w= &Apache::lonxml::get_param('width',$parstack,$safeeval);
88: my $h= &Apache::lonxml::get_param('height',$parstack,$safeeval);
89: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
90: if (!$code) { $code='GLabel.class'; }
91: if (!$codebase) { $codebase='/res/adm/includes/'; }
92: $Apache::randomlabel::tlabel_cnt=0;
93: $Apache::randomlabel::ilabel_cnt=0;
94: if ($target eq 'web') {
95: $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">";
96: $result.="<param name=\"bgimg\" value=\"$bgimg\">";
97: } elsif ($target eq 'tex') {
98: $bgimg=~s/(.gif|.jpg)$/.eps/;
99: $bgimg=~s/http:\/\/[^\/]*/\/home\/httpd\/html/;
100: $result.='\vspace*{2mm} \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
101: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')'
102: } elsif ($target eq 'edit') {
103: $result.=&Apache::edit::tag_start($target,$token);
104: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).'<br />'.
105: &Apache::edit::text_arg('Width(pixel):','width',$token,4).
106: &Apache::edit::text_arg('Height(pixel):','height',$token,4).
107: &Apache::edit::text_arg('TeXWidth(mm):','texwidth',$token,4).
108: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
109: } elsif ($target eq 'modified') {
110: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
111: 'bgimg','width','height',
112: 'texwidth');
113: if ($constructtag) {
114: $result = &Apache::edit::rebuild_tag($token);
115: $result.=&Apache::edit::handle_insert();
116: }
117: }
118: return $result;
119: }
120:
121: sub end_randomlabel {
122: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
123: my $result='';
124: my $count;
125:
126:
127: if ($target eq 'web') {
128: $count = $Apache::randomlabel::tlabel_cnt;
129: if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
130: $count = $Apache::randomlabel::ilabel_cnt;
131: if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
132: $result .= "</applet><BR />";
133: } elsif ($target eq 'tex') {
134: $result='\end{picture}';
135: } elsif ($target eq 'edit') {
136: $result.=&Apache::edit::end_table;
137: }
138: return $result;
139: }
140:
141: sub start_labelgroup {
142: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
143: my $result='';
144: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
145: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
146: $type =~tr/A-Z/a-z/;
147: if ($target eq 'web' || $target eq 'tex' ||
148: $target eq 'grade' || $target eq 'answer') {
149: $Apache::randomlabel::groupname=$name;
150: $Apache::randomlabel::type=$type;
151: @Apache::randomlabel::xcoord = ();
152: @Apache::randomlabel::ycoord = ();
153: @Apache::randomlabel::value = ();
154: @Apache::randomlabel::label_arr = ();
155: } elsif ($target eq 'edit') {
156: $result.=&Apache::edit::tag_start($target,$token);
157: $result.=&Apache::edit::text_arg('Name:','name',$token).
158: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
159: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
160: } elsif ($target eq 'modified') {
161: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
162: 'name','type');
163: if ($constructtag) {
164: $result = &Apache::edit::rebuild_tag($token);
165: $result.=&Apache::edit::handle_insert();
166: }
167: }
168: return $result;
169: }
170:
171: sub add_vars {
172: my ($name,$order,$label,$labelorder,$value,$safeeval) = @_;
173: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
174: my $out=Apache::run::run($code,$safeeval);
175: if ($value) {
176: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
177: $out=Apache::run::run($code,$safeeval);
178: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
179: $out=Apache::run::run($code,$safeeval);
180: }
181: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
182: $out=Apache::run::run($code,$safeeval);
183: }
184:
185: # begin to assign labels to locations
186: sub end_labelgroup {
187: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
188: my $gname = $Apache::randomlabel::groupname;
189: my $type = $Apache::randomlabel::type;
190: my $result='';
191: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
192: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
193: &Apache::structuretags::shuffle(\@idx_arr);
194: for(0 .. $#Apache::randomlabel::label_arr) {
195: my $str;
196: my $xstr;
197: my $ystr;
198: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
199: my $x = $Apache::randomlabel::xcoord[$_];
200: my $y = $Apache::randomlabel::ycoord[$_];
201: my $value = $Apache::randomlabel::value[$_];
202: if( $type eq 'text') {
203: &add_vars($gname,$_,$label,$idx_arr[$_],$value,$safeeval);
204: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
205: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
206: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
207: $Apache::randomlabel::tlabel_cnt += 1;
208: } elsif ( $type eq 'image') {
209: &add_vars($gname,$_,$idx_arr[$_],$idx_arr[$_],$value,$safeeval);
210: $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
211: $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
212: $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
213: $Apache::randomlabel::ilabel_cnt += 1;
214: } else {
215: &Apache::lonxml::error('Unknown type of label :'.$type.':');
216: }
217: if ($target eq 'web') {
218: $result .= '<param name="' . $str . '" value="'.$label.'">';
219: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
220: $result .= '<param name="' . $ystr . '" value="'.$y.'">';
221: }
222: }
223: } elsif ($target eq 'tex') {
224: my $WX1=0; # Web x-coord. of upper left corner (ULC)
225: my $WY1=0; # Web y-coord. of (ULC)
226: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
227: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
228: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
229: my $TX1=0;
230: my $TY1=$texwidth*($wheight/$wwidth);
231: my $TX2=$texwidth;
232: my $TY2=0;
233:
234:
235: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
236: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
237: my $cstx=$wwidth-$slopex*($TX2);
238: my $csty=$wheight-$slopey*($TY2);
239:
240: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
241: &Apache::structuretags::shuffle(\@idx_arr);
242:
243: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
244: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
245: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
246: my $x = $Apache::randomlabel::xcoord[$i];
247: my $y = $Apache::randomlabel::ycoord[$i];
248: my $value = $Apache::randomlabel::value[$i];
249: my $tcX=$x*($texwidth/$wwidth) - $texwidth;
250: my $tcY=$TY1-$y*($TY1/$wheight)-2;
251: $tcX=sprintf('%.2f',$tcX);
252: $tcY=sprintf('%.2f',$tcY);
253: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
254: if( $type eq 'text') {
255: &add_vars($gname,$i,$label,$idx_arr[$i],$value,$safeeval);
256: } elsif ( $type eq 'image') {
257: &add_vars($gname,$i,$idx_arr[$i],$idx_arr[$i],$value,$safeeval);
258: } else {
259: &Apache::lonxml::error('Unknown type of label :'.$type.':');
260: }
261: }
262: } elsif ($target eq 'edit') {
263: $result.=&Apache::edit::end_table;
264: }
265: return $result;
266: }
267:
268: # <location x="123" y="456" value="some value"/>
269: sub start_location {
270: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
271: my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
272: my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
273: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
274: my $result='';
275: push(@Apache::randomlabel::xcoord,$x);
276: push(@Apache::randomlabel::ycoord,$y);
277: push(@Apache::randomlabel::value,$value);
278: if ($target eq 'edit') {
279: $result.=&Apache::edit::tag_start($target,$token);
280: $result.=&Apache::edit::text_arg('X:','x',$token,4).
281: &Apache::edit::text_arg('Y:','y',$token,4).
282: &Apache::edit::text_arg('Value:','value',$token).
283: &Apache::edit::end_row();
284: $result.=&Apache::edit::end_table;
285: } elsif ($target eq 'modified') {
286: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
287: 'x','y','value');
288: if ($constructtag) {
289: $result = &Apache::edit::rebuild_tag($token);
290: $result.=&Apache::edit::handle_insert();
291: }
292: }
293: return $result;
294: }
295:
296: sub end_location {
297: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
298: my @result;
299: if ($target eq 'edit') { @result=('','no') }
300: return @result;
301: }
302:
303: # <label>$var_abc</label>
304: sub start_label {
305: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
306: my $result='';
307: if ($target eq 'web' || $target eq 'tex' ||
308: $target eq 'grade' || $target eq 'answer') {
309: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
310: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
311: push(@Apache::randomlabel::label_arr,$ltext);
312: } elsif ($target eq 'edit') {
313: $result.=&Apache::edit::tag_start($target,$token);
314: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
315: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row().
316: &Apache::edit::editfield('',$text,'',20,1).
317: &Apache::edit::end_table();
318: } elsif ($target eq 'modified') {
319: my $text=$$parser[-1]->get_text("/label");
320: $result.='<label>'.&Apache::edit::modifiedfield($token);
321: }
322: return $result;
323: }
324:
325: sub end_label {
326: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
327: my @result;
328: if ($target eq 'edit') { @result=('','no') }
329: return @result;
330: }
331:
332:
333:
334: 1;
335: __END__
336:
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