1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.15 2002/03/06 20:29:03 matthew 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);
105: $result.=&Apache::edit::browse('bgimg').'<br />'.
106: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
107: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
108: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
109: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
110: } elsif ($target eq 'modified') {
111: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
112: 'bgimg','width','height',
113: 'texwidth');
114: if ($constructtag) {
115: $result = &Apache::edit::rebuild_tag($token);
116: $result.=&Apache::edit::handle_insert();
117: }
118: }
119: return $result;
120: }
121:
122: sub end_randomlabel {
123: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
124: my $result='';
125: my $count;
126:
127:
128: if ($target eq 'web') {
129: $count = $Apache::randomlabel::tlabel_cnt;
130: if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
131: $count = $Apache::randomlabel::ilabel_cnt;
132: if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
133: $result .= "</applet><BR />";
134: } elsif ($target eq 'tex') {
135: $result='\end{picture}';
136: } elsif ($target eq 'edit') {
137: $result.=&Apache::edit::end_table;
138: }
139: return $result;
140: }
141:
142: sub start_labelgroup {
143: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
144: my $result='';
145: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
146: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
147: $type =~tr/A-Z/a-z/;
148: if ($target eq 'web' || $target eq 'tex' ||
149: $target eq 'grade' || $target eq 'answer') {
150: $Apache::randomlabel::groupname=$name;
151: $Apache::randomlabel::type=$type;
152: @Apache::randomlabel::xcoord = ();
153: @Apache::randomlabel::ycoord = ();
154: @Apache::randomlabel::value = ();
155: @Apache::randomlabel::label_arr = ();
156: } elsif ($target eq 'edit') {
157: $result.=&Apache::edit::tag_start($target,$token);
158: $result.=&Apache::edit::text_arg('Name:','name',$token).
159: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
160: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
161: } elsif ($target eq 'modified') {
162: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
163: 'name','type');
164: if ($constructtag) {
165: $result = &Apache::edit::rebuild_tag($token);
166: $result.=&Apache::edit::handle_insert();
167: }
168: }
169: return $result;
170: }
171:
172: sub add_vars {
173: my ($name,$order,$label,$labelorder,$value,$safeeval) = @_;
174: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
175: my $out=Apache::run::run($code,$safeeval);
176: if ($value) {
177: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
178: $out=Apache::run::run($code,$safeeval);
179: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
180: $out=Apache::run::run($code,$safeeval);
181: }
182: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
183: $out=Apache::run::run($code,$safeeval);
184: }
185:
186: # begin to assign labels to locations
187: sub end_labelgroup {
188: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
189: my $gname = $Apache::randomlabel::groupname;
190: my $type = $Apache::randomlabel::type;
191: my $result='';
192: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
193: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
194: &Apache::structuretags::shuffle(\@idx_arr);
195: for(0 .. $#Apache::randomlabel::label_arr) {
196: my $str;
197: my $xstr;
198: my $ystr;
199: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
200: my $x = $Apache::randomlabel::xcoord[$_];
201: my $y = $Apache::randomlabel::ycoord[$_];
202: my $value = $Apache::randomlabel::value[$_];
203: if( $type eq 'text') {
204: &add_vars($gname,$_,$label,$idx_arr[$_],$value,$safeeval);
205: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
206: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
207: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
208: $Apache::randomlabel::tlabel_cnt += 1;
209: } elsif ( $type eq 'image') {
210: &add_vars($gname,$_,$idx_arr[$_],$idx_arr[$_],$value,$safeeval);
211: $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
212: $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
213: $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
214: $Apache::randomlabel::ilabel_cnt += 1;
215: } else {
216: &Apache::lonxml::error('Unknown type of label :'.$type.':');
217: }
218: if ($target eq 'web') {
219: $result .= '<param name="' . $str . '" value="'.$label.'">';
220: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
221: $result .= '<param name="' . $ystr . '" value="'.$y.'">';
222: }
223: }
224: } elsif ($target eq 'tex') {
225: my $WX1=0; # Web x-coord. of upper left corner (ULC)
226: my $WY1=0; # Web y-coord. of (ULC)
227: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
228: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
229: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
230: my $TX1=0;
231: my $TY1=$texwidth*($wheight/$wwidth);
232: my $TX2=$texwidth;
233: my $TY2=0;
234:
235:
236: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
237: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
238: my $cstx=$wwidth-$slopex*($TX2);
239: my $csty=$wheight-$slopey*($TY2);
240:
241: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
242: &Apache::structuretags::shuffle(\@idx_arr);
243:
244: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
245: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
246: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
247: my $x = $Apache::randomlabel::xcoord[$i];
248: my $y = $Apache::randomlabel::ycoord[$i];
249: my $value = $Apache::randomlabel::value[$i];
250: my $tcX=$x*($texwidth/$wwidth) - $texwidth;
251: my $tcY=$TY1-$y*($TY1/$wheight)-2;
252: $tcX=sprintf('%.2f',$tcX);
253: $tcY=sprintf('%.2f',$tcY);
254: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
255: if( $type eq 'text') {
256: &add_vars($gname,$i,$label,$idx_arr[$i],$value,$safeeval);
257: } elsif ( $type eq 'image') {
258: &add_vars($gname,$i,$idx_arr[$i],$idx_arr[$i],$value,$safeeval);
259: } else {
260: &Apache::lonxml::error('Unknown type of label :'.$type.':');
261: }
262: }
263: } elsif ($target eq 'edit') {
264: $result.=&Apache::edit::end_table;
265: }
266: return $result;
267: }
268:
269: # <location x="123" y="456" value="some value"/>
270: sub start_location {
271: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
272: my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
273: my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
274: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
275: my $result='';
276: push(@Apache::randomlabel::xcoord,$x);
277: push(@Apache::randomlabel::ycoord,$y);
278: push(@Apache::randomlabel::value,$value);
279: if ($target eq 'edit') {
280: $result.=&Apache::edit::tag_start($target,$token);
281: $result.=&Apache::edit::text_arg('X:','x',$token,4).
282: &Apache::edit::text_arg('Y:','y',$token,4).
283: &Apache::edit::text_arg('Value:','value',$token).
284: &Apache::edit::end_row();
285: $result.=&Apache::edit::end_table;
286: } elsif ($target eq 'modified') {
287: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
288: 'x','y','value');
289: if ($constructtag) {
290: $result = &Apache::edit::rebuild_tag($token);
291: $result.=&Apache::edit::handle_insert();
292: }
293: }
294: return $result;
295: }
296:
297: sub end_location {
298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
299: my @result;
300: if ($target eq 'edit') { @result=('','no') }
301: return @result;
302: }
303:
304: # <label>$var_abc</label>
305: sub start_label {
306: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
307: my $result='';
308: if ($target eq 'web' || $target eq 'tex' ||
309: $target eq 'grade' || $target eq 'answer') {
310: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
311: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
312: push(@Apache::randomlabel::label_arr,$ltext);
313: } elsif ($target eq 'edit') {
314: $result.=&Apache::edit::tag_start($target,$token);
315: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
316: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row().
317: &Apache::edit::editfield('',$text,'',20,1).
318: &Apache::edit::end_table();
319: } elsif ($target eq 'modified') {
320: my $text=$$parser[-1]->get_text("/label");
321: $result.='<label>'.&Apache::edit::modifiedfield($token);
322: }
323: return $result;
324: }
325:
326: sub end_label {
327: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
328: my @result;
329: if ($target eq 'edit') { @result=('','no') }
330: return @result;
331: }
332:
333:
334:
335: 1;
336: __END__
337:
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