1: # The LearningOnline Network with CAPA
2: # random labelling tool
3: #
4: # $Id: randomlabel.pm,v 1.24 2002/04/25 21:36:36 sakharuk 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) : $GroupTwo[2] = "TEXT-2"
58: # ===========================================
59: package Apache::randomlabel;
60: use Apache::lonnet;
61: use strict;
62: use Apache::edit;
63:
64: BEGIN {
65: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
66: }
67:
68: sub check_int {
69: # utility function to do error checking on a integer.
70: my ($num,$default) = @_;
71: $default = 100 if (! defined($default));
72: $num =~ s/\s+//g; # We dont need no stinkin white space!
73: # If it is a real, just grab the integer part.
74: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
75: # set to default if what we have left doesn't match anything...
76: $num = $default unless ($num =~/^\d+$/);
77: return $num;
78: }
79:
80: sub start_randomlabel {
81: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
82: my $result='';
83: push (@Apache::lonxml::extlinks, '/res/adm/includes/GLabel.class');
84: push (@Apache::lonxml::namespace,'randomlabel');
85: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
86: if ( $bgimg !~ /^http:/ ) {
87: push (@Apache::lonxml::extlinks,$bgimg);
88: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
89: if ($bgimg =~ /$Apache::lonnet::perlvar{'lonDocRoot'}/) {
90: $bgimg=~s/$Apache::lonnet::perlvar{'lonDocRoot'}//;
91: } elsif ($bgimg =~ m:^/home/.*/public_html:) {
92: $bgimg =~ s:^/home/(.*)/public_html:/~$1:;
93: }
94: $bgimg="http://".$ENV{'SERVER_NAME'}.$bgimg;
95: }
96: my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
97: my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
98: my $w= &check_int(&Apache::lonxml::get_param('width',$parstack,$safeeval));
99: my $h= &check_int(&Apache::lonxml::get_param('height',$parstack,$safeeval));
100: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
101: if (!$code) { $code='GLabel.class'; }
102: if (!$codebase) { $codebase='/res/adm/includes/'; }
103: $Apache::randomlabel::tlabel_cnt=0;
104: $Apache::randomlabel::ilabel_cnt=0;
105: if ($target eq 'web') {
106: $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">";
107: $result.="<param name=\"bgimg\" value=\"$bgimg\">";
108: } elsif ($target eq 'tex') {
109: $bgimg=~s/(.gif|.jpg)$/.eps/;
110: $bgimg= &Apache::lonnet::filelocation($bgimg);
111: $bgimg=~s/http:\/[^\/]*/\/home\/httpd\/html/;
112: $bgimg=~s/\/$//;
113: $result.='\vspace*{2mm} \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
114: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}(0,0)('.$texwidth.','.$texwidth*$h/$w.')'
115: } elsif ($target eq 'edit') {
116: $result.=&Apache::edit::tag_start($target,$token);
117: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
118: $result.=&Apache::edit::browse('bgimg').' ';
119: $result.=&Apache::edit::search('bgimg').'<br />'.
120: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
121: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
122: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
123: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
124: } elsif ($target eq 'modified') {
125: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
126: 'bgimg','width','height',
127: 'texwidth');
128: if ($constructtag) {
129: $result = &Apache::edit::rebuild_tag($token);
130: $result.=&Apache::edit::handle_insert();
131: }
132: }
133: return $result;
134: }
135:
136: sub end_randomlabel {
137: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
138: my $result='';
139: my $count;
140: pop @Apache::lonxml::namespace;
141: if ($target eq 'web') {
142: $count = $Apache::randomlabel::tlabel_cnt;
143: if( $count != 0) { $result.= "<param name=\"count\" value=\"$count\">"; }
144: $count = $Apache::randomlabel::ilabel_cnt;
145: if( $count != 0) { $result.= "<param name=\"icount\" value=\"$count\">"; }
146: $result .= "</applet><BR />";
147: } elsif ($target eq 'tex') {
148: $result='\end{picture}\\\\';
149: } elsif ($target eq 'edit') {
150: $result.=&Apache::edit::end_table;
151: }
152: return $result;
153: }
154:
155: sub start_labelgroup {
156: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
157: my $result='';
158: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
159: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
160: $type =~tr/A-Z/a-z/;
161: if ($target eq 'web' || $target eq 'tex' ||
162: $target eq 'grade' || $target eq 'answer') {
163: $Apache::randomlabel::groupname=$name;
164: $Apache::randomlabel::type=$type;
165: @Apache::randomlabel::xcoord = ();
166: @Apache::randomlabel::ycoord = ();
167: @Apache::randomlabel::value = ();
168: @Apache::randomlabel::label_arr = ();
169: } elsif ($target eq 'edit') {
170: $result.=&Apache::edit::tag_start($target,$token);
171: $result.=&Apache::edit::text_arg('Name:','name',$token).
172: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
173: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
174: } elsif ($target eq 'modified') {
175: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
176: 'name','type');
177: if ($constructtag) {
178: $result = &Apache::edit::rebuild_tag($token);
179: $result.=&Apache::edit::handle_insert();
180: }
181: }
182: return $result;
183: }
184:
185: sub add_vars {
186: my ($name,$order,$label,$labelorder,$value,$safeeval) = @_;
187: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
188: my $out=Apache::run::run($code,$safeeval);
189: if ($value) {
190: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
191: $out=Apache::run::run($code,$safeeval);
192: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
193: $out=Apache::run::run($code,$safeeval);
194: }
195: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
196: $out=Apache::run::run($code,$safeeval);
197: }
198:
199: # begin to assign labels to locations
200: sub end_labelgroup {
201: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
202: my $gname = $Apache::randomlabel::groupname;
203: my $type = $Apache::randomlabel::type;
204: my $result='';
205: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade') {
206: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
207: &Apache::structuretags::shuffle(\@idx_arr);
208: for(0 .. $#Apache::randomlabel::label_arr) {
209: my $str;
210: my $xstr;
211: my $ystr;
212: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
213: my $x = $Apache::randomlabel::xcoord[$_];
214: my $y = $Apache::randomlabel::ycoord[$_];
215: my $value = $Apache::randomlabel::value[$_];
216: if( $type eq 'text') {
217: &add_vars($gname,$_,$label,$idx_arr[$_],$value,$safeeval);
218: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
219: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
220: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
221: $Apache::randomlabel::tlabel_cnt += 1;
222: } elsif ( $type eq 'image') {
223: &add_vars($gname,$_,$idx_arr[$_],$idx_arr[$_],$value,$safeeval);
224: $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
225: $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
226: $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
227: $Apache::randomlabel::ilabel_cnt += 1;
228: } else {
229: &Apache::lonxml::error('Unknown type of label :'.$type.':');
230: }
231: if ($target eq 'web') {
232: $result .= '<param name="' . $str . '" value="'.$label.'">';
233: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
234: $result .= '<param name="' . $ystr . '" value="'.$y.'">';
235: }
236: }
237: } elsif ($target eq 'tex') {
238: my $WX1=0; # Web x-coord. of upper left corner (ULC)
239: my $WY1=0; # Web y-coord. of (ULC)
240: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
241: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
242: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
243: my $TX1=0;
244: my $TY1=$texwidth*($wheight/$wwidth);
245: my $TX2=$texwidth;
246: my $TY2=0;
247:
248:
249: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
250: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
251: my $cstx=$wwidth-$slopex*($TX2);
252: my $csty=$wheight-$slopey*($TY2);
253:
254: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
255: &Apache::structuretags::shuffle(\@idx_arr);
256:
257: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
258: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
259: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
260: my $x = $Apache::randomlabel::xcoord[$i];
261: my $y = $Apache::randomlabel::ycoord[$i];
262: my $value = $Apache::randomlabel::value[$i];
263: # my $tcX=$x*($texwidth/$wwidth) - $texwidth;
264: my $tcX=$x*($texwidth/$wwidth);
265: # my $tcY=$TY1-$y*($TY1/$wheight)-2;
266: my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
267: my $tcY=$TY1-$y*($TY1/$wheight)+$texwidth*$ratio;
268: $tcX=sprintf('%.2f',$tcX);
269: $tcY=sprintf('%.2f',$tcY);
270: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
271: if( $type eq 'text') {
272: &add_vars($gname,$i,$label,$idx_arr[$i],$value,$safeeval);
273: } elsif ( $type eq 'image') {
274: &add_vars($gname,$i,$idx_arr[$i],$idx_arr[$i],$value,$safeeval);
275: } else {
276: &Apache::lonxml::error('Unknown type of label :'.$type.':');
277: }
278: }
279: } elsif ($target eq 'edit') {
280: $result.=&Apache::edit::end_table;
281: }
282: return $result;
283: }
284:
285: # <location x="123" y="456" value="some value"/>
286: sub start_location {
287: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
288: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
289: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
290: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
291: my $result='';
292: push(@Apache::randomlabel::xcoord,$x);
293: push(@Apache::randomlabel::ycoord,$y);
294: push(@Apache::randomlabel::value,$value);
295: if ($target eq 'edit') {
296: $result.=&Apache::edit::tag_start($target,$token);
297: $result.=&Apache::edit::text_arg('X:','x',$token,4).
298: &Apache::edit::text_arg('Y:','y',$token,4).
299: &Apache::edit::text_arg('Value:','value',$token).
300: &Apache::edit::end_row();
301: $result.=&Apache::edit::end_table;
302: } elsif ($target eq 'modified') {
303: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
304: 'x','y','value');
305: if ($constructtag) {
306: $result = &Apache::edit::rebuild_tag($token);
307: $result.=&Apache::edit::handle_insert();
308: }
309: }
310: return $result;
311: }
312:
313: sub end_location {
314: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
315: my @result;
316: if ($target eq 'edit') { @result=('','no') }
317: return @result;
318: }
319:
320: # <label>$var_abc</label>
321: sub start_label {
322: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
323: my $result='';
324: if ($target eq 'web' || $target eq 'tex' ||
325: $target eq 'grade' || $target eq 'answer') {
326: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
327: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
328: push(@Apache::randomlabel::label_arr,$ltext);
329: } elsif ($target eq 'edit') {
330: $result.=&Apache::edit::tag_start($target,$token);
331: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
332: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row().
333: &Apache::edit::editline('',$text,'',20).
334: &Apache::edit::end_table();
335: } elsif ($target eq 'modified') {
336: my $text=$$parser[-1]->get_text("/label");
337: $result.='<label>'.&Apache::edit::modifiedfield($token);
338: }
339: return $result;
340: }
341:
342: sub end_label {
343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
344: my @result;
345: if ($target eq 'edit') { @result=('','no') }
346: return @result;
347: }
348:
349:
350:
351: 1;
352: __END__
353:
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