Annotation of loncom/homework/randomlabel.pm, revision 1.37
1.1 tsai 1: # The LearningOnline Network with CAPA
2: # random labelling tool
1.8 albertel 3: #
1.37 ! albertel 4: # $Id: randomlabel.pm,v 1.36 2002/08/27 18:21:27 sakharuk Exp $
1.8 albertel 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: #
1.3 tsai 28: # 7/20/2001 Isaac Tsai, initial syntax
29: # 8/10/2001 Isaac Tsai,
30: # 8/30/2001 Isaac Tsai,
1.1 tsai 31: # SYNTAX:
1.4 albertel 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>
1.1 tsai 40: # </labelgroup>
1.4 albertel 41: # <labelgroup name="GroupTwo" type="text">
42: # <location x="12" y="45" />
43: # <location x="32" y="65" />
44: # <location x="21" y="54" />
1.3 tsai 45: # <label>TEXT-1</label>
46: # <label>TEXT-2</label>
47: # <label>TEXT-3</label>
1.1 tsai 48: # </labelgroup>
49: # </randomlabel>
50: # ===========================================
1.3 tsai 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) : $GroupTwo[2] = "TEXT-2"
1.1 tsai 58: # ===========================================
59: package Apache::randomlabel;
1.24 sakharuk 60: use Apache::lonnet;
1.1 tsai 61: use strict;
1.13 sakharuk 62: use Apache::edit;
1.36 sakharuk 63: use Apache::File();
1.1 tsai 64:
1.13 sakharuk 65: BEGIN {
1.1 tsai 66: &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
67: }
68:
1.23 matthew 69: sub check_int {
70: # utility function to do error checking on a integer.
71: my ($num,$default) = @_;
72: $default = 100 if (! defined($default));
73: $num =~ s/\s+//g; # We dont need no stinkin white space!
74: # If it is a real, just grab the integer part.
75: ($num,undef) = split (/\./,$num) if ($num =~ /\./);
76: # set to default if what we have left doesn't match anything...
77: $num = $default unless ($num =~/^\d+$/);
78: return $num;
79: }
80:
1.1 tsai 81: sub start_randomlabel {
82: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
83: my $result='';
1.23 matthew 84: push (@Apache::lonxml::extlinks, '/res/adm/includes/GLabel.class');
1.20 albertel 85: push (@Apache::lonxml::namespace,'randomlabel');
1.1 tsai 86: my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
1.6 albertel 87: if ( $bgimg !~ /^http:/ ) {
1.23 matthew 88: push (@Apache::lonxml::extlinks,$bgimg);
1.6 albertel 89: $bgimg=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$bgimg);
1.7 albertel 90: if ($bgimg =~ /$Apache::lonnet::perlvar{'lonDocRoot'}/) {
91: $bgimg=~s/$Apache::lonnet::perlvar{'lonDocRoot'}//;
92: } elsif ($bgimg =~ m:^/home/.*/public_html:) {
93: $bgimg =~ s:^/home/(.*)/public_html:/~$1:;
94: }
1.31 sakharuk 95: $bgimg='http://'.$ENV{'SERVER_NAME'}.$bgimg;
1.6 albertel 96: }
1.1 tsai 97: my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
98: my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
1.23 matthew 99: my $w= &check_int(&Apache::lonxml::get_param('width',$parstack,$safeeval));
100: my $h= &check_int(&Apache::lonxml::get_param('height',$parstack,$safeeval));
1.4 albertel 101: my $texwidth= &Apache::lonxml::get_param('texwidth',$parstack,$safeeval);
102: if (!$code) { $code='GLabel.class'; }
103: if (!$codebase) { $codebase='/res/adm/includes/'; }
1.3 tsai 104: $Apache::randomlabel::tlabel_cnt=0;
105: $Apache::randomlabel::ilabel_cnt=0;
106: if ($target eq 'web') {
1.26 albertel 107: $result.="<applet code=\"$code\" codebase=\"$codebase\" width=\"$w\" height=\"$h\">\n";
108: $result.="<param name=\"bgimg\" value=\"$bgimg\">\n";
1.4 albertel 109: } elsif ($target eq 'tex') {
1.36 sakharuk 110: my $newbgimg = $bgimg;
1.12 sakharuk 111: $bgimg=~s/(.gif|.jpg)$/.eps/;
1.24 sakharuk 112: $bgimg= &Apache::lonnet::filelocation($bgimg);
1.31 sakharuk 113: if (not $ENV{'request.role'}=~/^au\./) {
114: $bgimg=~s/http:\/[^\/]*/\/home\/httpd\/html/;
1.35 sakharuk 115: $bgimg=~s/\/$//;
1.36 sakharuk 116: #if no eps file try to replicate it
1.35 sakharuk 117: if (not-e $bgimg) {
118: my $response = &Apache::lonnet::repcopy($bgimg);
1.36 sakharuk 119: #if replication failed try to find ps file
120: if (not-e $bgimg) {
121: $bgimg=~s/\.eps$/\.ps/;
122: #if no ps file try to replicate it
123: if (not-e $bgimg) {
124: $response = &Apache::lonnet::repcopy($bgimg);
125: #if replication failed try to produce eps file dynamically
126: $bgimg=~s/\.ps$/\.eps/;
127: my $temp_file;
128: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
129: $temp_file = Apache::File->new('>>'.$filename);
130: $newbgimg =~ s/(.*)\/res\//\/home\/httpd\/html\/res\//;
131: print $temp_file "$newbgimg\n";
132: $bgimg =~ m/\/([^\/]+)$/;
133: $bgimg = '/home/httpd/prtspool/'.$1;
134: }
135: }
1.35 sakharuk 136: }
1.31 sakharuk 137: } else {
138: $bgimg=~s/http:\/[^\/]*\/~([^\/]+)/\/home\/$1\/public_html/;
139: }
1.24 sakharuk 140: $bgimg=~s/\/$//;
1.34 sakharuk 141: my $dirtywidth=$texwidth+5;
1.31 sakharuk 142: if ($texwidth==90) {
1.34 sakharuk 143: $result.='\vspace*{2mm}\noindent \parbox{'.$dirtywidth.' mm}{ \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
144: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')(0,-'.$texwidth*$h/$w.')';
1.31 sakharuk 145: } else {
1.34 sakharuk 146: $result.='\vspace*{2mm}\noindent \parbox{'.$dirtywidth.' mm}{ \noindent \epsfxsize='.$texwidth.' mm \epsffile{'.
147: $bgimg.'}\setlength{\unitlength}{1mm} \begin{picture}('.$texwidth.','.$texwidth*$h/$w.')(0,-'.$texwidth*$h/$w.')';
1.31 sakharuk 148: }
1.3 tsai 149: } elsif ($target eq 'edit') {
1.4 albertel 150: $result.=&Apache::edit::tag_start($target,$token);
1.18 matthew 151: $result.=&Apache::edit::text_arg('Image:','bgimg',$token,75).' ';
152: $result.=&Apache::edit::browse('bgimg').' ';
153: $result.=&Apache::edit::search('bgimg').'<br />'.
1.15 matthew 154: &Apache::edit::text_arg('Width(pixel):' ,'width' ,$token,6).
155: &Apache::edit::text_arg('Height(pixel):','height' ,$token,6).
156: &Apache::edit::text_arg('TeXWidth(mm):' ,'texwidth',$token,6).
157: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.3 tsai 158: } elsif ($target eq 'modified') {
1.4 albertel 159: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
160: 'bgimg','width','height',
161: 'texwidth');
162: if ($constructtag) {
163: $result = &Apache::edit::rebuild_tag($token);
164: $result.=&Apache::edit::handle_insert();
165: }
1.1 tsai 166: }
167: return $result;
168: }
169:
170: sub end_randomlabel {
1.3 tsai 171: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
172: my $result='';
173: my $count;
1.21 albertel 174: pop @Apache::lonxml::namespace;
1.3 tsai 175: if ($target eq 'web') {
1.4 albertel 176: $count = $Apache::randomlabel::tlabel_cnt;
1.26 albertel 177: if( $count != 0) { $result.= "<param name=\"COUNT\" value=\"$count\">\n"; }
1.4 albertel 178: $count = $Apache::randomlabel::ilabel_cnt;
1.26 albertel 179: if( $count != 0) { $result.= "<param name=\"ICOUNT\" value=\"$count\">\n"; }
180: $result .= "</applet>\n<BR />";
1.4 albertel 181: } elsif ($target eq 'tex') {
1.33 sakharuk 182: $result='\end{picture}\\\\}';
1.31 sakharuk 183: @$parstack[-1]=~/\$height\s*=\s*?"(.+)?"/;
1.34 sakharuk 184: my $one=$1;
185: @$parstack[-1]=~/\$width\s*=\s*?"(.+)?"/;
186: my $two=$1;
187: @$parstack[-1]=~/\$texwidth\s*=\s*?"(.+)?"/;
188: my $three=$1;
189: my $howtoskipback = $three*$one/$two;
190: $result.=' \vskip -'.$howtoskipback.' mm ';
1.4 albertel 191: } elsif ($target eq 'edit') {
192: $result.=&Apache::edit::end_table;
1.3 tsai 193: }
194: return $result;
1.1 tsai 195: }
196:
197: sub start_labelgroup {
198: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
199: my $result='';
200: my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
201: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
1.2 tsai 202: $type =~tr/A-Z/a-z/;
1.37 ! albertel 203: if ($target eq 'web' || $target eq 'tex' ||
! 204: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
1.4 albertel 205: $Apache::randomlabel::groupname=$name;
206: $Apache::randomlabel::type=$type;
207: @Apache::randomlabel::xcoord = ();
208: @Apache::randomlabel::ycoord = ();
1.5 albertel 209: @Apache::randomlabel::value = ();
1.4 albertel 210: @Apache::randomlabel::label_arr = ();
1.26 albertel 211: @Apache::randomlabel::decription = ();
1.4 albertel 212: } elsif ($target eq 'edit') {
213: $result.=&Apache::edit::tag_start($target,$token);
214: $result.=&Apache::edit::text_arg('Name:','name',$token).
215: &Apache::edit::select_arg('Type:','type',['text','image'],$token).
1.13 sakharuk 216: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1.4 albertel 217: } elsif ($target eq 'modified') {
218: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
219: 'name','type');
220: if ($constructtag) {
221: $result = &Apache::edit::rebuild_tag($token);
222: $result.=&Apache::edit::handle_insert();
223: }
224: }
1.3 tsai 225: return $result;
1.1 tsai 226: }
227:
1.5 albertel 228: sub add_vars {
1.28 albertel 229: my ($name,$order,$label,$labelorder,$value,$image,$safeeval) = @_;
1.5 albertel 230: my $code = '${'.$name."}{'".($order+1)."'}='".$label."';";
231: my $out=Apache::run::run($code,$safeeval);
232: if ($value) {
233: $code = '${'.$name."}{'value_".($order+1)."'}='".$value."';";
234: $out=Apache::run::run($code,$safeeval);
235: $code = '${'.$name."}{'labelvalue_".($labelorder+1)."'}='".$value."';";
236: $out=Apache::run::run($code,$safeeval);
1.4 albertel 237: }
1.28 albertel 238: if ($image) {
239: my $code = '${'.$name."}{'image_".($order+1)."'}='".$image."';";
240: my $out=Apache::run::run($code,$safeeval);
241: }
1.5 albertel 242: $code = '${'.$name."}{'numlocations'}='".($order+1)."';";
243: $out=Apache::run::run($code,$safeeval);
1.4 albertel 244: }
1.5 albertel 245:
1.1 tsai 246: # begin to assign labels to locations
247: sub end_labelgroup {
248: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
249: my $gname = $Apache::randomlabel::groupname;
1.2 tsai 250: my $type = $Apache::randomlabel::type;
1.4 albertel 251: my $result='';
1.37 ! albertel 252: if ($target eq 'web' || $target eq 'answer' || $target eq 'grade' ||
! 253: $target eq 'analyze') {
1.4 albertel 254: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
255: &Apache::structuretags::shuffle(\@idx_arr);
256: for(0 .. $#Apache::randomlabel::label_arr) {
257: my $str;
258: my $xstr;
259: my $ystr;
260: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
1.5 albertel 261: my $x = $Apache::randomlabel::xcoord[$_];
262: my $y = $Apache::randomlabel::ycoord[$_];
263: my $value = $Apache::randomlabel::value[$_];
1.4 albertel 264: if( $type eq 'text') {
1.28 albertel 265: &add_vars($gname,$_,$label,$idx_arr[$_],$value,'',$safeeval);
1.4 albertel 266: $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
267: $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
268: $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
269: $Apache::randomlabel::tlabel_cnt += 1;
270: } elsif ( $type eq 'image') {
1.28 albertel 271: &add_vars($gname,$_,
272: $Apache::randomlabel::description[$idx_arr[$_]],
273: $idx_arr[$_],$value,$label,$safeeval);
1.26 albertel 274: $str = 'IMG'.$Apache::randomlabel::ilabel_cnt;
275: $xstr = 'IX'.$Apache::randomlabel::ilabel_cnt;
276: $ystr = 'IY'.$Apache::randomlabel::ilabel_cnt;
1.4 albertel 277: $Apache::randomlabel::ilabel_cnt += 1;
278: } else {
279: &Apache::lonxml::error('Unknown type of label :'.$type.':');
280: }
1.5 albertel 281: if ($target eq 'web') {
282: $result .= '<param name="' . $str . '" value="'.$label.'">';
283: $result .= '<param name="' . $xstr . '" value="'.$x.'">';
1.26 albertel 284: $result .= '<param name="' . $ystr . '" value="'.$y.'">'."\n";
1.5 albertel 285: }
1.3 tsai 286: }
1.4 albertel 287: } elsif ($target eq 'tex') {
288: my $WX1=0; # Web x-coord. of upper left corner (ULC)
289: my $WY1=0; # Web y-coord. of (ULC)
290: my $wwidth=&Apache::lonxml::get_param('width',$parstack,$safeeval,-2);
291: my $wheight=&Apache::lonxml::get_param('height',$parstack,$safeeval,-2);
292: my $texwidth=&Apache::lonxml::get_param('texwidth',$parstack,$safeeval,-2);
293: my $TX1=0;
294: my $TY1=$texwidth*($wheight/$wwidth);
295: my $TX2=$texwidth;
296: my $TY2=0;
297:
298:
299: my $slopex=($wwidth-$WX1)/($TX2-$TX1);
300: my $slopey=($wheight-$WY1)/($TY2-($TY1-1.0));
301: my $cstx=$wwidth-$slopex*($TX2);
302: my $csty=$wheight-$slopey*($TY2);
303:
304: my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
305: &Apache::structuretags::shuffle(\@idx_arr);
306:
307: &Apache::lonxml::debug("Array is:".$#Apache::randomlabel::label_arr.":");
308: for(my $i=0;$i <= $#Apache::randomlabel::label_arr; $i++) {
309: my $label = "$Apache::randomlabel::label_arr[ $idx_arr[$i] ]";
310: my $x = $Apache::randomlabel::xcoord[$i];
311: my $y = $Apache::randomlabel::ycoord[$i];
1.5 albertel 312: my $value = $Apache::randomlabel::value[$i];
1.31 sakharuk 313: #x latex coordinate
1.34 sakharuk 314: my $tcX=($x)*($texwidth/$wwidth);
1.31 sakharuk 315: #y latex coordinate
1.34 sakharuk 316: # my $ratio=($wwidth > 0 ? $wheight/$wwidth : 1 );
317: my $tcY=$TY1-$y*($TY1/$wheight);
1.4 albertel 318: $tcX=sprintf('%.2f',$tcX);
319: $tcY=sprintf('%.2f',$tcY);
320: $result.='\put('.$tcX.','.$tcY.'){\normalsize \bf '.$label.'}'."\n";
321: if( $type eq 'text') {
1.28 albertel 322: &add_vars($gname,$i,$label,$idx_arr[$i],$value,'',$safeeval);
1.4 albertel 323: } elsif ( $type eq 'image') {
1.28 albertel 324: &add_vars($gname,$i,
325: $Apache::randomlabel::description[$idx_arr[$i]],
326: $idx_arr[$i],$value,$label,$safeeval);
1.4 albertel 327: } else {
328: &Apache::lonxml::error('Unknown type of label :'.$type.':');
329: }
330: }
331: } elsif ($target eq 'edit') {
332: $result.=&Apache::edit::end_table;
1.1 tsai 333: }
1.4 albertel 334: return $result;
1.1 tsai 335: }
336:
1.5 albertel 337: # <location x="123" y="456" value="some value"/>
1.1 tsai 338: sub start_location {
339: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.23 matthew 340: my $x= &check_int(&Apache::lonxml::get_param('x',$parstack,$safeeval),50);
341: my $y= &check_int(&Apache::lonxml::get_param('y',$parstack,$safeeval),50);
1.5 albertel 342: my $value= &Apache::lonxml::get_param('value',$parstack,$safeeval);
1.3 tsai 343: my $result='';
1.1 tsai 344: push(@Apache::randomlabel::xcoord,$x);
1.4 albertel 345: push(@Apache::randomlabel::ycoord,$y);
1.5 albertel 346: push(@Apache::randomlabel::value,$value);
1.4 albertel 347: if ($target eq 'edit') {
348: $result.=&Apache::edit::tag_start($target,$token);
349: $result.=&Apache::edit::text_arg('X:','x',$token,4).
350: &Apache::edit::text_arg('Y:','y',$token,4).
1.5 albertel 351: &Apache::edit::text_arg('Value:','value',$token).
1.13 sakharuk 352: &Apache::edit::end_row();
1.4 albertel 353: $result.=&Apache::edit::end_table;
354: } elsif ($target eq 'modified') {
355: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
1.5 albertel 356: 'x','y','value');
1.4 albertel 357: if ($constructtag) {
358: $result = &Apache::edit::rebuild_tag($token);
359: $result.=&Apache::edit::handle_insert();
360: }
361: }
1.3 tsai 362: return $result;
1.1 tsai 363: }
364:
365: sub end_location {
1.3 tsai 366: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.4 albertel 367: my @result;
368: if ($target eq 'edit') { @result=('','no') }
369: return @result;
1.1 tsai 370: }
371:
1.2 tsai 372: # <label>$var_abc</label>
1.1 tsai 373: sub start_label {
374: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.3 tsai 375: my $result='';
1.26 albertel 376: my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval,-2);
1.37 ! albertel 377: if ($target eq 'web' || $target eq 'tex' ||
! 378: $target eq 'grade' || $target eq 'answer' || $target eq 'analyze') {
1.4 albertel 379: my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
1.14 albertel 380: $ltext=&Apache::run::evaluate($ltext,$safeeval,$$parstack[-1]);
1.26 albertel 381: if ($type eq 'image') {
382: &Apache::lonxml::debug("Turning $ltext and $Apache::lonxml::pwd[-1]");
383: $ltext="http://$ENV{'SERVER_NAME'}".&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],
384: $ltext);
385: &Apache::lonxml::debug("into $ltext");
386: my $description = &Apache::lonxml::get_param('description',
387: $parstack,$safeeval);
388: push(@Apache::randomlabel::description,$description);
389: }
1.4 albertel 390: push(@Apache::randomlabel::label_arr,$ltext);
391: } elsif ($target eq 'edit') {
1.26 albertel 392: $result.=&Apache::edit::tag_start($target,$token,"$type Label");
1.4 albertel 393: my $text=&Apache::lonxml::get_all_text("/label",$$parser[-1]);
1.27 albertel 394: if ($type eq 'image') {
395: $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
396: $result.=&Apache::edit::text_arg('Description:','description',$token);
397: }
1.26 albertel 398: if ($type eq 'text') { $result.="Label Text:"; }
399: if ($type eq 'image') { $result.="Path to image:"; }
400: $result.=&Apache::edit::editline('',$text,'',20).
401: &Apache::edit::end_table();
1.4 albertel 402: } elsif ($target eq 'modified') {
403: my $text=$$parser[-1]->get_text("/label");
1.26 albertel 404: $result = '<label>';
405: if ($type eq 'image') {
406: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
407: 'description');
408: if ($constructtag) {
409: $result = &Apache::edit::rebuild_tag($token);
410: } else {
411: $result = $token->[4];
412: }
413: }
414: $result.=&Apache::edit::modifiedfield($token);
1.4 albertel 415: }
1.3 tsai 416: return $result;
1.1 tsai 417: }
418:
419: sub end_label {
1.3 tsai 420: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.4 albertel 421: my @result;
422: if ($target eq 'edit') { @result=('','no') }
423: return @result;
1.1 tsai 424: }
425:
426:
427:
428: 1;
429: __END__
430:
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