1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.23 2002/04/08 21:28:53 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) : $GroupTwo[2] = "TEXT-2"
58: # ===========================================
59: package Apache::randomlabel;
60: use strict;
61: use Apache::edit;
62:
63: BEGIN {
64: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
65: }
66:
67: sub check_int {
68: # utility function to do error checking on a integer.
69: my ($num,$default) = @_;
70: $default = 100 if (! defined($default));
71: $num =~ s/\s+//g; # We dont need no stinkin white space!
72: # If it is a real, just grab the integer part.
73: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
74: # set to default if what we have left doesn't match anything...
75: $num = $default unless ($num =~/^\d+$/);
76: return $num;
77: }
78:
79: sub start_randomlabel {
80: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
81: my $result='';
82: push (@Apache::lonxml::extlinks, '/res/adm/includes/GLabel.class');
83: push (@Apache::lonxml::namespace,'randomlabel');
84: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
85: if ( $bgimg !~ /^http:/ ) {
86: push (@Apache::lonxml::extlinks,$bgimg);
87: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
88: if ($bgimg =~ /$Apache::lonnet::perlvar{'lonDocRoot'}/) {
89: $bgimg=~s/$Apache::lonnet::perlvar{'lonDocRoot'}//;
90: } elsif ($bgimg =~ m:^/home/.*/public_html:) {
91: $bgimg =~ s:^/home/(.*)/public_html:/~$1:;
92: }
93: $bgimg="http://".$ENV{'SERVER_NAME'}.$bgimg;
94: }
95: my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
96: my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
97: my $w= &check_int(&Apache::lonxml::get_param('width',$parstack,$safeeval));
98: my $h= &check_int(&Apache::lonxml::get_param('height',$parstack,$safeeval));
99: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
100: if (!$code) { $code='GLabel.class'; }
101: if (!$codebase) { $codebase='/res/adm/includes/'; }
102: $Apache::randomlabel::tlabel_cnt=0;
103: $Apache::randomlabel::ilabel_cnt=0;
104: if ($target eq 'web') {
105: $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">";
106: $result.="<param name=\"bgimg\" value=\"$bgimg\">";
107: } elsif ($target eq 'tex') {
108: $bgimg=~s/(.gif|.jpg)$/.eps/;
109: $bgimg=~s/http:\/\/[^\/]*/\/home\/httpd\/html/;
110: $result.='\vspace*{2mm} \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
111: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')'
112: } elsif ($target eq 'edit') {
113: $result.=&Apache::edit::tag_start($target,$token);
114: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
115: $result.=&Apache::edit::browse('bgimg').' ';
116: $result.=&Apache::edit::search('bgimg').'<br />'.
117: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
118: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
119: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
120: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
121: } elsif ($target eq 'modified') {
122: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
123: 'bgimg','width','height',
124: 'texwidth');
125: if ($constructtag) {
126: $result = &Apache::edit::rebuild_tag($token);
127: $result.=&Apache::edit::handle_insert();
128: }
129: }
130: return $result;
131: }
132:
133: sub end_randomlabel {
134: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
135: my $result='';
136: my $count;
137: pop @Apache::lonxml::namespace;
138: if ($target eq 'web') {
139: $count = $Apache::randomlabel::tlabel_cnt;
140: if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
141: $count = $Apache::randomlabel::ilabel_cnt;
142: if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
143: $result .= "</applet><BR />";
144: } elsif ($target eq 'tex') {
145: $result='\end{picture}';
146: } elsif ($target eq 'edit') {
147: $result.=&Apache::edit::end_table;
148: }
149: return $result;
150: }
151:
152: sub start_labelgroup {
153: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
154: my $result='';
155: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
156: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
157: $type =~tr/A-Z/a-z/;
158: if ($target eq 'web' || $target eq 'tex' ||
159: $target eq 'grade' || $target eq 'answer') {
160: $Apache::randomlabel::groupname=$name;
161: $Apache::randomlabel::type=$type;
162: @Apache::randomlabel::xcoord = ();
163: @Apache::randomlabel::ycoord = ();
164: @Apache::randomlabel::value = ();
165: @Apache::randomlabel::label_arr = ();
166: } elsif ($target eq 'edit') {
167: $result.=&Apache::edit::tag_start($target,$token);
168: $result.=&Apache::edit::text_arg('Name:','name',$token).
169: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
170: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
171: } elsif ($target eq 'modified') {
172: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
173: 'name','type');
174: if ($constructtag) {
175: $result = &Apache::edit::rebuild_tag($token);
176: $result.=&Apache::edit::handle_insert();
177: }
178: }
179: return $result;
180: }
181:
182: sub add_vars {
183: my ($name,$order,$label,$labelorder,$value,$safeeval) = @_;
184: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
185: my $out=Apache::run::run($code,$safeeval);
186: if ($value) {
187: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
188: $out=Apache::run::run($code,$safeeval);
189: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
190: $out=Apache::run::run($code,$safeeval);
191: }
192: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
193: $out=Apache::run::run($code,$safeeval);
194: }
195:
196: # begin to assign labels to locations
197: sub end_labelgroup {
198: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
199: my $gname = $Apache::randomlabel::groupname;
200: my $type = $Apache::randomlabel::type;
201: my $result='';
202: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
203: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
204: &Apache::structuretags::shuffle(\@idx_arr);
205: for(0 .. $#Apache::randomlabel::label_arr) {
206: my $str;
207: my $xstr;
208: my $ystr;
209: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
210: my $x = $Apache::randomlabel::xcoord[$_];
211: my $y = $Apache::randomlabel::ycoord[$_];
212: my $value = $Apache::randomlabel::value[$_];
213: if( $type eq 'text') {
214: &add_vars($gname,$_,$label,$idx_arr[$_],$value,$safeeval);
215: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
216: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
217: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
218: $Apache::randomlabel::tlabel_cnt += 1;
219: } elsif ( $type eq 'image') {
220: &add_vars($gname,$_,$idx_arr[$_],$idx_arr[$_],$value,$safeeval);
221: $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
222: $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
223: $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
224: $Apache::randomlabel::ilabel_cnt += 1;
225: } else {
226: &Apache::lonxml::error('Unknown type of label :'.$type.':');
227: }
228: if ($target eq 'web') {
229: $result .= '<param name="' . $str . '" value="'.$label.'">';
230: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
231: $result .= '<param name="' . $ystr . '" value="'.$y.'">';
232: }
233: }
234: } elsif ($target eq 'tex') {
235: my $WX1=0; # Web x-coord. of upper left corner (ULC)
236: my $WY1=0; # Web y-coord. of (ULC)
237: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
238: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
239: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
240: my $TX1=0;
241: my $TY1=$texwidth*($wheight/$wwidth);
242: my $TX2=$texwidth;
243: my $TY2=0;
244:
245:
246: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
247: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
248: my $cstx=$wwidth-$slopex*($TX2);
249: my $csty=$wheight-$slopey*($TY2);
250:
251: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
252: &Apache::structuretags::shuffle(\@idx_arr);
253:
254: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
255: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
256: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
257: my $x = $Apache::randomlabel::xcoord[$i];
258: my $y = $Apache::randomlabel::ycoord[$i];
259: my $value = $Apache::randomlabel::value[$i];
260: # my $tcX=$x*($texwidth/$wwidth) - $texwidth;
261: my $tcX=$x*($texwidth/$wwidth);
262: # my $tcY=$TY1-$y*($TY1/$wheight)-2;
263: my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
264: my $tcY=$TY1-$y*($TY1/$wheight)+$texwidth*$ratio;
265: $tcX=sprintf('%.2f',$tcX);
266: $tcY=sprintf('%.2f',$tcY);
267: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
268: if( $type eq 'text') {
269: &add_vars($gname,$i,$label,$idx_arr[$i],$value,$safeeval);
270: } elsif ( $type eq 'image') {
271: &add_vars($gname,$i,$idx_arr[$i],$idx_arr[$i],$value,$safeeval);
272: } else {
273: &Apache::lonxml::error('Unknown type of label :'.$type.':');
274: }
275: }
276: } elsif ($target eq 'edit') {
277: $result.=&Apache::edit::end_table;
278: }
279: return $result;
280: }
281:
282: # <location x="123" y="456" value="some value"/>
283: sub start_location {
284: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
285: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
286: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
287: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
288: my $result='';
289: push(@Apache::randomlabel::xcoord,$x);
290: push(@Apache::randomlabel::ycoord,$y);
291: push(@Apache::randomlabel::value,$value);
292: if ($target eq 'edit') {
293: $result.=&Apache::edit::tag_start($target,$token);
294: $result.=&Apache::edit::text_arg('X:','x',$token,4).
295: &Apache::edit::text_arg('Y:','y',$token,4).
296: &Apache::edit::text_arg('Value:','value',$token).
297: &Apache::edit::end_row();
298: $result.=&Apache::edit::end_table;
299: } elsif ($target eq 'modified') {
300: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
301: 'x','y','value');
302: if ($constructtag) {
303: $result = &Apache::edit::rebuild_tag($token);
304: $result.=&Apache::edit::handle_insert();
305: }
306: }
307: return $result;
308: }
309:
310: sub end_location {
311: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
312: my @result;
313: if ($target eq 'edit') { @result=('','no') }
314: return @result;
315: }
316:
317: # <label>$var_abc</label>
318: sub start_label {
319: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
320: my $result='';
321: if ($target eq 'web' || $target eq 'tex' ||
322: $target eq 'grade' || $target eq 'answer') {
323: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
324: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
325: push(@Apache::randomlabel::label_arr,$ltext);
326: } elsif ($target eq 'edit') {
327: $result.=&Apache::edit::tag_start($target,$token);
328: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
329: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row().
330: &Apache::edit::editline('',$text,'',20).
331: &Apache::edit::end_table();
332: } elsif ($target eq 'modified') {
333: my $text=$$parser[-1]->get_text("/label");
334: $result.='<label>'.&Apache::edit::modifiedfield($token);
335: }
336: return $result;
337: }
338:
339: sub end_label {
340: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
341: my @result;
342: if ($target eq 'edit') { @result=('','no') }
343: return @result;
344: }
345:
346:
347:
348: 1;
349: __END__
350:
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