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    1: # The LearningOnline Network with CAPA
    2: # random labelling tool
    3: # 7/20/2001 Isaac Tsai, initial syntax
    4: # 8/10/2001 Isaac Tsai, 
    5: # 8/30/2001 Isaac Tsai, 
    6: # SYNTAX:
    7: # <randomlabel bgimg=URL code=JAVACLASS codebase=URL width=12 height=45>
    8: #    <labelgroup name=GroupOne type=image>
    9: #      <location x=123 y=456 />
   10: #      <location x=321 y=654 />
   11: #      <location x=213 y=546 />
   12: #      <label>IMG-URL</label>
   13: #      <label>IMG-URL</label>
   14: #      <label>IMG-URL</label>
   15: #    </labelgroup>
   16: #    <labelgroup name=GroupTwo type=text>
   17: #      <location x=12 y=45 />
   18: #      <location x=32 y=65 />
   19: #      <location x=21 y=54 />
   20: #      <label>TEXT-1</label>
   21: #      <label>TEXT-2</label>
   22: #      <label>TEXT-3</label>
   23: #    </labelgroup>
   24: #   </randomlabel>
   25: #  ===========================================
   26: #  side effect:
   27: #    location (123,456): $GroupOne[0] = 2  # images give out indexes
   28: #             (321,654): $GroupOne[1] = 1
   29: #             (213,546): $GroupOne[2] = 0
   30: #    location (12,45)  : $GroupTwo[0] = "TEXT-3"
   31: #             (32,65)  : $GroupTwo[1] = "TEXT-1"
   32: #             (21,54)  : $GroupTwo[2] = "TEXT-2"
   33: #  ===========================================
   34: package Apache::randomlabel;
   35: use strict;
   36: 
   37: sub BEGIN {
   38:   &Apache::lonxml::register('Apache::randomlabel',('randomlabel','labelgroup','location','label'));
   39: }
   40: 
   41: sub start_randomlabel {
   42:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   43:   my $result='';
   44:   my $bgimg= &Apache::lonxml::get_param('bgimg',$parstack,$safeeval);
   45:   my $code = &Apache::lonxml::get_param('code',$parstack,$safeeval);
   46:   my $codebase = &Apache::lonxml::get_param('codebase',$parstack,$safeeval);
   47:   my $w= &Apache::lonxml::get_param('width',$parstack,$safeeval);
   48:   my $h= &Apache::lonxml::get_param('height',$parstack,$safeeval);
   49:   
   50:   $Apache::randomlabel::tlabel_cnt=0;
   51:   $Apache::randomlabel::ilabel_cnt=0;
   52:   if ($target eq 'web') {
   53:     $result.="<applet code=$code codebase=$codebase width=\"$w\" height=\"$h\">";
   54:     $result.="<param name=\"bgimg\" value=\"$bgimg\">";
   55:   } elsif ($target eq 'edit') {
   56:   } elsif ($target eq 'modified') {
   57:   } else {
   58:   }
   59:   return $result;
   60: }
   61: 
   62: sub end_randomlabel {
   63:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   64:   my $result='';
   65:   my $count;
   66: 
   67:   $count = $Apache::randomlabel::tlabel_cnt;
   68:   if( $count != 0) {
   69:     $result.= "<param name=\"count\" value=\"$count\">";
   70:   }
   71:   $count = $Apache::randomlabel::ilabel_cnt;
   72:   if( $count != 0) {
   73:     $result.= "<param name=\"icount\" value=\"$count\">";
   74:   }
   75:   if ($target eq 'web') {
   76:     $result .= "</applet><BR />";
   77:   }
   78:   return $result;
   79: }
   80: 
   81: sub start_labelgroup {
   82:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   83:   my $result='';
   84:   my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
   85:   my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
   86:   $type =~tr/A-Z/a-z/;
   87:   $Apache::randomlabel::groupname=$name;
   88:   $Apache::randomlabel::type=$type;
   89:   @Apache::randomlabel::xcoord = ();
   90:   @Apache::randomlabel::ycoord = ();
   91:   @Apache::randomlabel::label_arr  = ();
   92:   return $result;
   93: }
   94: 
   95: # begin to assign labels to locations
   96: sub end_labelgroup {
   97:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   98:   my $gname = $Apache::randomlabel::groupname;
   99:   my $count;
  100:   my $type  = $Apache::randomlabel::type;
  101:   my $code;
  102:   my $out;
  103:   my $label;
  104:   my $x;
  105:   my $y;
  106:   my $text='';
  107:   my $str;
  108:   my $xstr;
  109:   my $ystr;
  110: 
  111:   my @idx_arr = (0 .. $#Apache::randomlabel::label_arr);
  112:   &Apache::structuretags::shuffle(\@idx_arr);
  113:   for(0 .. $#Apache::randomlabel::label_arr) {
  114:     $label = "$Apache::randomlabel::label_arr[ $idx_arr[$_] ]";
  115:     if( $type eq 'text') {
  116:       $code = "push(\@$gname, $label);" ;
  117:       $str = 'LB'.$Apache::randomlabel::tlabel_cnt;
  118:       $xstr = 'X'.$Apache::randomlabel::tlabel_cnt;
  119:       $ystr = 'Y'.$Apache::randomlabel::tlabel_cnt;
  120:       $Apache::randomlabel::tlabel_cnt += 1;
  121:     } elsif ( $type eq 'image') {
  122:       $code = "push(\@$gname, $idx_arr[$_]);" ;
  123:       $str = 'LB'.$Apache::randomlabel::ilabel_cnt;
  124:       $xstr = 'X'.$Apache::randomlabel::ilabel_cnt;
  125:       $ystr = 'Y'.$Apache::randomlabel::ilabel_cnt;
  126:       $Apache::randomlabel::ilabel_cnt += 1;
  127:     } else {
  128:     }
  129:     # $x = pop @Apache::randomlabel::xcoord;
  130:     # $y = pop @Apache::randomlabel::ycoord;
  131:     $x = $Apache::randomlabel::xcoord[$_];
  132:     $y = $Apache::randomlabel::ycoord[$_];
  133:     $text .= "<param name=\"" . $str  . "\" value=\"$label\">";
  134:     $text .= "<param name=\"" . $xstr . "\" value=\"$x\"> ";
  135:     $text .= "<param name=\"" . $ystr . "\" value=\"$y\">";
  136:     $out=Apache::run::run($code,$safeeval);
  137:   }
  138:   return $text;
  139: }
  140: 
  141: # <location x=123 y=456 />
  142: sub start_location {
  143:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  144:   my $x= &Apache::lonxml::get_param('x',$parstack,$safeeval);
  145:   my $y= &Apache::lonxml::get_param('y',$parstack,$safeeval);
  146:   my $result='';
  147:   
  148:   push(@Apache::randomlabel::xcoord,$x);
  149:   push(@Apache::randomlabel::ycoord,$y); 
  150:   return $result;
  151: }
  152: 
  153: sub end_location {
  154:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  155:   my $result='';
  156:   return $result;
  157: }
  158: 
  159: # <label>$var_abc</label>
  160: sub start_label {
  161:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  162:   my $ltext=&Apache::lonxml::get_all_text("/label",$$parser[$#$parser]);
  163:   my $result='';
  164: 
  165:   push(@Apache::randomlabel::label_arr,$ltext);
  166:   return $result;
  167: }
  168: 
  169: sub end_label {
  170:   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
  171:   my $result='';
  172: 
  173:   return $result;
  174: }
  175: 
  176: 
  177: 
  178: 1;
  179: __END__
  180: