1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.18 2002/03/08 18:31:27 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: $Apache::randomlabel::ratio = ($w > 0 ? $h/$w : 1 );
90: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
91: if (!$code) { $code='GLabel.class'; }
92: if (!$codebase) { $codebase='/res/adm/includes/'; }
93: $Apache::randomlabel::tlabel_cnt=0;
94: $Apache::randomlabel::ilabel_cnt=0;
95: if ($target eq 'web') {
96: $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">";
97: $result.="<param name=\"bgimg\" value=\"$bgimg\">";
98: } elsif ($target eq 'tex') {
99: $bgimg=~s/(.gif|.jpg)$/.eps/;
100: $bgimg=~s/http:\/\/[^\/]*/\/home\/httpd\/html/;
101: $result.='\vspace*{2mm} \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
102: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')'
103: } elsif ($target eq 'edit') {
104: $result.=&Apache::edit::tag_start($target,$token);
105: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
106: $result.=&Apache::edit::browse('bgimg').' ';
107: $result.=&Apache::edit::search('bgimg').'<br />'.
108: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
109: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
110: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
111: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
112: } elsif ($target eq 'modified') {
113: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
114: 'bgimg','width','height',
115: 'texwidth');
116: if ($constructtag) {
117: $result = &Apache::edit::rebuild_tag($token);
118: $result.=&Apache::edit::handle_insert();
119: }
120: }
121: return $result;
122: }
123:
124: sub end_randomlabel {
125: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
126: my $result='';
127: my $count;
128:
129:
130: if ($target eq 'web') {
131: $count = $Apache::randomlabel::tlabel_cnt;
132: if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
133: $count = $Apache::randomlabel::ilabel_cnt;
134: if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
135: $result .= "</applet><BR />";
136: } elsif ($target eq 'tex') {
137: $result='\end{picture}';
138: } elsif ($target eq 'edit') {
139: $result.=&Apache::edit::end_table;
140: }
141: return $result;
142: }
143:
144: sub start_labelgroup {
145: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
146: my $result='';
147: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
148: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
149: $type =~tr/A-Z/a-z/;
150: if ($target eq 'web' || $target eq 'tex' ||
151: $target eq 'grade' || $target eq 'answer') {
152: $Apache::randomlabel::groupname=$name;
153: $Apache::randomlabel::type=$type;
154: @Apache::randomlabel::xcoord = ();
155: @Apache::randomlabel::ycoord = ();
156: @Apache::randomlabel::value = ();
157: @Apache::randomlabel::label_arr = ();
158: } elsif ($target eq 'edit') {
159: $result.=&Apache::edit::tag_start($target,$token);
160: $result.=&Apache::edit::text_arg('Name:','name',$token).
161: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
162: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
163: } elsif ($target eq 'modified') {
164: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
165: 'name','type');
166: if ($constructtag) {
167: $result = &Apache::edit::rebuild_tag($token);
168: $result.=&Apache::edit::handle_insert();
169: }
170: }
171: return $result;
172: }
173:
174: sub add_vars {
175: my ($name,$order,$label,$labelorder,$value,$safeeval) = @_;
176: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
177: my $out=Apache::run::run($code,$safeeval);
178: if ($value) {
179: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
180: $out=Apache::run::run($code,$safeeval);
181: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
182: $out=Apache::run::run($code,$safeeval);
183: }
184: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
185: $out=Apache::run::run($code,$safeeval);
186: }
187:
188: # begin to assign labels to locations
189: sub end_labelgroup {
190: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
191: my $gname = $Apache::randomlabel::groupname;
192: my $type = $Apache::randomlabel::type;
193: my $result='';
194: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
195: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
196: &Apache::structuretags::shuffle(\@idx_arr);
197: for(0 .. $#Apache::randomlabel::label_arr) {
198: my $str;
199: my $xstr;
200: my $ystr;
201: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
202: my $x = $Apache::randomlabel::xcoord[$_];
203: my $y = $Apache::randomlabel::ycoord[$_];
204: my $value = $Apache::randomlabel::value[$_];
205: if( $type eq 'text') {
206: &add_vars($gname,$_,$label,$idx_arr[$_],$value,$safeeval);
207: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
208: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
209: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
210: $Apache::randomlabel::tlabel_cnt += 1;
211: } elsif ( $type eq 'image') {
212: &add_vars($gname,$_,$idx_arr[$_],$idx_arr[$_],$value,$safeeval);
213: $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
214: $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
215: $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
216: $Apache::randomlabel::ilabel_cnt += 1;
217: } else {
218: &Apache::lonxml::error('Unknown type of label :'.$type.':');
219: }
220: if ($target eq 'web') {
221: $result .= '<param name="' . $str . '" value="'.$label.'">';
222: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
223: $result .= '<param name="' . $ystr . '" value="'.$y.'">';
224: }
225: }
226: } elsif ($target eq 'tex') {
227: my $WX1=0; # Web x-coord. of upper left corner (ULC)
228: my $WY1=0; # Web y-coord. of (ULC)
229: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
230: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
231: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
232: my $TX1=0;
233: my $TY1=$texwidth*($wheight/$wwidth);
234: my $TX2=$texwidth;
235: my $TY2=0;
236:
237:
238: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
239: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
240: my $cstx=$wwidth-$slopex*($TX2);
241: my $csty=$wheight-$slopey*($TY2);
242:
243: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
244: &Apache::structuretags::shuffle(\@idx_arr);
245:
246: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
247: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
248: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
249: my $x = $Apache::randomlabel::xcoord[$i];
250: my $y = $Apache::randomlabel::ycoord[$i];
251: my $value = $Apache::randomlabel::value[$i];
252: # my $tcX=$x*($texwidth/$wwidth) - $texwidth;
253: my $tcX=$x*($texwidth/$wwidth);
254: # my $tcY=$TY1-$y*($TY1/$wheight)-2;
255: my $tcY=$TY1-$y*($TY1/$wheight)+$texwidth*$Apache::randomlabel::ratio;
256: $tcX=sprintf('%.2f',$tcX);
257: $tcY=sprintf('%.2f',$tcY);
258: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
259: if( $type eq 'text') {
260: &add_vars($gname,$i,$label,$idx_arr[$i],$value,$safeeval);
261: } elsif ( $type eq 'image') {
262: &add_vars($gname,$i,$idx_arr[$i],$idx_arr[$i],$value,$safeeval);
263: } else {
264: &Apache::lonxml::error('Unknown type of label :'.$type.':');
265: }
266: }
267: } elsif ($target eq 'edit') {
268: $result.=&Apache::edit::end_table;
269: }
270: return $result;
271: }
272:
273: # <location x="123" y="456" value="some value"/>
274: sub start_location {
275: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
276: my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
277: my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
278: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
279: my $result='';
280: push(@Apache::randomlabel::xcoord,$x);
281: push(@Apache::randomlabel::ycoord,$y);
282: push(@Apache::randomlabel::value,$value);
283: if ($target eq 'edit') {
284: $result.=&Apache::edit::tag_start($target,$token);
285: $result.=&Apache::edit::text_arg('X:','x',$token,4).
286: &Apache::edit::text_arg('Y:','y',$token,4).
287: &Apache::edit::text_arg('Value:','value',$token).
288: &Apache::edit::end_row();
289: $result.=&Apache::edit::end_table;
290: } elsif ($target eq 'modified') {
291: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
292: 'x','y','value');
293: if ($constructtag) {
294: $result = &Apache::edit::rebuild_tag($token);
295: $result.=&Apache::edit::handle_insert();
296: }
297: }
298: return $result;
299: }
300:
301: sub end_location {
302: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
303: my @result;
304: if ($target eq 'edit') { @result=('','no') }
305: return @result;
306: }
307:
308: # <label>$var_abc</label>
309: sub start_label {
310: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
311: my $result='';
312: if ($target eq 'web' || $target eq 'tex' ||
313: $target eq 'grade' || $target eq 'answer') {
314: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
315: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
316: push(@Apache::randomlabel::label_arr,$ltext);
317: } elsif ($target eq 'edit') {
318: $result.=&Apache::edit::tag_start($target,$token);
319: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
320: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row().
321: &Apache::edit::editfield('',$text,'',20,1).
322: &Apache::edit::end_table();
323: } elsif ($target eq 'modified') {
324: my $text=$$parser[-1]->get_text("/label");
325: $result.='<label>'.&Apache::edit::modifiedfield($token);
326: }
327: return $result;
328: }
329:
330: sub end_label {
331: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
332: my @result;
333: if ($target eq 'edit') { @result=('','no') }
334: return @result;
335: }
336:
337:
338:
339: 1;
340: __END__
341:
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