1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.9 2002/01/11 16:32:29 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) : $GroupTwo[2] = "TEXT-2"
58: # ===========================================
59: package Apache::randomlabel;
60: use strict;
61: use Apache::edit;
62:
63: sub BEGIN {
64: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
65: }
66:
67: sub start_randomlabel {
68: my ($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: $bgimg=~s/(.gif|.jpg)$/.ps/;
99: $result.='\vspace*{2mm} \\ \noindent \epsfxsize='.$texwidth.' \epsffile{'.
100: $bgimg.'}\setlength{\unitlength}{1mm} \\ \begin{picture}(0,0)(0,-5)';
101: } elsif ($target eq 'edit') {
102: $result.=&Apache::edit::tag_start($target,$token);
103: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).'<br />'.
104: &Apache::edit::text_arg('Width(pixel):','width',$token,4).
105: &Apache::edit::text_arg('Height(pixel):','height',$token,4).
106: &Apache::edit::text_arg('TeXWidth(mm):','texwidth',$token,4).
107: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
108: } elsif ($target eq 'modified') {
109: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
110: 'bgimg','width','height',
111: 'texwidth');
112: if ($constructtag) {
113: $result = &Apache::edit::rebuild_tag($token);
114: $result.=&Apache::edit::handle_insert();
115: }
116: }
117: return $result;
118: }
119:
120: sub end_randomlabel {
121: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
122: my $result='';
123: my $count;
124:
125:
126: if ($target eq 'web') {
127: $count = $Apache::randomlabel::tlabel_cnt;
128: if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
129: $count = $Apache::randomlabel::ilabel_cnt;
130: if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
131: $result .= "</applet><BR />";
132: } elsif ($target eq 'tex') {
133: $result='\end{picture}';
134: } elsif ($target eq 'edit') {
135: $result.=&Apache::edit::end_table;
136: }
137: return $result;
138: }
139:
140: sub start_labelgroup {
141: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
142: my $result='';
143: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
144: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
145: $type =~tr/A-Z/a-z/;
146: if ($target eq 'web' || $target eq 'tex' ||
147: $target eq 'grade' || $target eq 'answer') {
148: $Apache::randomlabel::groupname=$name;
149: $Apache::randomlabel::type=$type;
150: @Apache::randomlabel::xcoord = ();
151: @Apache::randomlabel::ycoord = ();
152: @Apache::randomlabel::value = ();
153: @Apache::randomlabel::label_arr = ();
154: } elsif ($target eq 'edit') {
155: $result.=&Apache::edit::tag_start($target,$token);
156: $result.=&Apache::edit::text_arg('Name:','name',$token).
157: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
158: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
159: } elsif ($target eq 'modified') {
160: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
161: 'name','type');
162: if ($constructtag) {
163: $result = &Apache::edit::rebuild_tag($token);
164: $result.=&Apache::edit::handle_insert();
165: }
166: }
167: return $result;
168: }
169:
170: sub add_vars {
171: my ($name,$order,$label,$labelorder,$value,$safeeval) = @_;
172: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
173: my $out=Apache::run::run($code,$safeeval);
174: if ($value) {
175: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
176: $out=Apache::run::run($code,$safeeval);
177: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
178: $out=Apache::run::run($code,$safeeval);
179: }
180: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
181: $out=Apache::run::run($code,$safeeval);
182: }
183:
184: # begin to assign labels to locations
185: sub end_labelgroup {
186: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
187: my $gname = $Apache::randomlabel::groupname;
188: my $type = $Apache::randomlabel::type;
189: my $result='';
190: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
191: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
192: &Apache::structuretags::shuffle(\@idx_arr);
193: for(0 .. $#Apache::randomlabel::label_arr) {
194: my $str;
195: my $xstr;
196: my $ystr;
197: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
198: my $x = $Apache::randomlabel::xcoord[$_];
199: my $y = $Apache::randomlabel::ycoord[$_];
200: my $value = $Apache::randomlabel::value[$_];
201: if( $type eq 'text') {
202: &add_vars($gname,$_,$label,$idx_arr[$_],$value,$safeeval);
203: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
204: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
205: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
206: $Apache::randomlabel::tlabel_cnt += 1;
207: } elsif ( $type eq 'image') {
208: &add_vars($gname,$_,$idx_arr[$_],$idx_arr[$_],$value,$safeeval);
209: $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
210: $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
211: $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
212: $Apache::randomlabel::ilabel_cnt += 1;
213: } else {
214: &Apache::lonxml::error('Unknown type of label :'.$type.':');
215: }
216: if ($target eq 'web') {
217: $result .= '<param name="' . $str . '" value="'.$label.'">';
218: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
219: $result .= '<param name="' . $ystr . '" value="'.$y.'">';
220: }
221: }
222: } elsif ($target eq 'tex') {
223: my $WX1=0; # Web x-coord. of upper left corner (ULC)
224: my $WY1=0; # Web y-coord. of (ULC)
225: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
226: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
227: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
228: my $TX1=0;
229: my $TY1=$texwidth*($wheight/$wwidth);
230: my $TX2=$texwidth;
231: my $TY2=0;
232:
233:
234: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
235: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
236: my $cstx=$wwidth-$slopex*($TX2);
237: my $csty=$wheight-$slopey*($TY2);
238:
239: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
240: &Apache::structuretags::shuffle(\@idx_arr);
241:
242: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
243: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
244: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
245: my $x = $Apache::randomlabel::xcoord[$i];
246: my $y = $Apache::randomlabel::ycoord[$i];
247: my $value = $Apache::randomlabel::value[$i];
248: my $tcX=$x*($texwidth/$wwidth);
249: my $tcY=$TY1-$y*($TY1/$wheight)-2;
250: $tcX=sprintf('%.2f',$tcX);
251: $tcY=sprintf('%.2f',$tcY);
252: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
253: if( $type eq 'text') {
254: &add_vars($gname,$i,$label,$idx_arr[$i],$value,$safeeval);
255: } elsif ( $type eq 'image') {
256: &add_vars($gname,$i,$idx_arr[$i],$idx_arr[$i],$value,$safeeval);
257: } else {
258: &Apache::lonxml::error('Unknown type of label :'.$type.':');
259: }
260: }
261: } elsif ($target eq 'edit') {
262: $result.=&Apache::edit::end_table;
263: }
264: return $result;
265: }
266:
267: # <location x="123" y="456" value="some value"/>
268: sub start_location {
269: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
270: my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
271: my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
272: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
273: my $result='';
274: push(@Apache::randomlabel::xcoord,$x);
275: push(@Apache::randomlabel::ycoord,$y);
276: push(@Apache::randomlabel::value,$value);
277: if ($target eq 'edit') {
278: $result.=&Apache::edit::tag_start($target,$token);
279: $result.=&Apache::edit::text_arg('X:','x',$token,4).
280: &Apache::edit::text_arg('Y:','y',$token,4).
281: &Apache::edit::text_arg('Value:','value',$token).
282: &Apache::edit::end_row();
283: $result.=&Apache::edit::end_table;
284: } elsif ($target eq 'modified') {
285: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
286: 'x','y','value');
287: if ($constructtag) {
288: $result = &Apache::edit::rebuild_tag($token);
289: $result.=&Apache::edit::handle_insert();
290: }
291: }
292: return $result;
293: }
294:
295: sub end_location {
296: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
297: my @result;
298: if ($target eq 'edit') { @result=('','no') }
299: return @result;
300: }
301:
302: # <label>$var_abc</label>
303: sub start_label {
304: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
305: my $result='';
306: if ($target eq 'web' || $target eq 'tex' ||
307: $target eq 'grade' || $target eq 'answer') {
308: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
309: push(@Apache::randomlabel::label_arr,$ltext);
310: } elsif ($target eq 'edit') {
311: $result.=&Apache::edit::tag_start($target,$token);
312: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
313: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row().
314: &Apache::edit::editfield('',$text,'',20,1).
315: &Apache::edit::end_table();
316: } elsif ($target eq 'modified') {
317: my $text=$$parser[-1]->get_text("/label");
318: $result.=&Apache::edit::modifiedfield($token);
319: }
320: return $result;
321: }
322:
323: sub end_label {
324: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
325: my @result;
326: if ($target eq 'edit') { @result=('','no') }
327: return @result;
328: }
329:
330:
331:
332: 1;
333: __END__
334:
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