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corrected version

    1: # The LearningOnline Network with CAPA
    2: # Style Parser Module (new version)
    3: #
    4: # written 01/08/01 by Alexander Sakharuk
    5: #
    6: 
    7: package Apache::style;
    8: 
    9: use strict;
   10: use HTML::TokeParser;
   11: 
   12: sub styleparser {
   13: 
   14:     my ($target,$content_style_string) = @_;
   15:     my $current_key = '';
   16:     my $current_value = '';
   17:     my @keys = ();
   18:     my @values = ();
   19:     my @style_array = ();
   20:     my $stoken;
   21: 
   22:     my $b_pos;
   23:     my $e_pos;
   24:     my $entry;
   25: 
   26:     $b_pos = index($content_style_string,'<definetag',0);
   27:     while ($b_pos != -1) {
   28: 	$e_pos = index($content_style_string,'</definetag',$b_pos);
   29: 	$entry = substr($content_style_string,$b_pos,$e_pos-$b_pos+12);       
   30: 	$_ = $entry;
   31: 	m/<definetag\s+name\s*=\s*\"([^\"]*)\"/;
   32: 	$current_key = $1;
   33: 	push @keys,$current_key;
   34: #	&Apache::lonxml::debug("$current_key\n");
   35: 	my $b_position =  index($entry,'<'.$target.'>',0);
   36: 	my $e_position =  index($entry,'</'.$target.'>',$b_position);
   37: 	my $target_length = length($target) + 2;
   38: 	if ($b_position > -1) {
   39: 	    my $entry_target = substr($entry,$b_position+$target_length,$e_position-$b_position-$target_length);
   40: 	    my $pstyle = HTML::TokeParser->new(\$entry_target);
   41: 	    while ($stoken = $pstyle->get_token) {
   42: 		if ($stoken->[0] eq 'T') {
   43: 		    $current_value .= $stoken->[1];
   44: 		} elsif ($stoken->[0] eq 'S') {
   45: 		    my $number = &testkey($stoken->[0],$stoken->[1],@keys);
   46: 		    if ($number != -1) {
   47: 			$current_value .= &testvalue($number,$stoken->[0],$stoken->[2],@values);
   48: 		    } else {
   49: 			$current_value .= $stoken->[4];
   50: 		    } 
   51: 	        } else {
   52: 		    my $number = &testkey($stoken->[0],$stoken->[1],@keys);
   53: 		    if ($number != -1) {
   54: 			$current_value .= &testvalue($number,$stoken->[0],$stoken->[2],@values);
   55: 		    } else {
   56: 			$current_value .= $stoken->[2];
   57: 		    } 
   58: 	        }
   59: 
   60: 
   61: 
   62: 	    } 
   63: 	}
   64:         $current_value =~ s/\n//g;
   65: ###########
   66: #	$current_value =~ s/^\s*//g;
   67: #	$current_value =~ s/\s*$//g;
   68: #	$current_value =~ s/\( (\w)/($1/g;
   69: ###########
   70: 	push @values,$current_value;
   71: #	&Apache::lonxml::debug("a:$current_value $#values \n");
   72: 	$current_key = '';
   73: 	$current_value ='';
   74: 	$b_pos = index($content_style_string,'<definetag',$b_pos+1);
   75:     }
   76: 
   77:     for (my $i=0; $i<=$#keys; $i++) {
   78: 	push @style_array,$keys[$i],$values[$i]; 
   79:     }
   80:     my %style_for_target =  @style_array;
   81: 
   82: # check printing
   83: #    foreach $current_key (sort keys %style_for_target) {
   84: #	&Apache::lonxml::debug("$current_key => $style_for_target{$current_key}\n");
   85: #    }
   86: # return result
   87:   return %style_for_target; 
   88: 
   89: }
   90: 
   91: sub testkey {
   92: 
   93:     my ($zeroth,$first,@keys) = @_; 
   94:     my $number = -1;
   95:     if ($zeroth eq 'S') {
   96: 	for (my $i=$#keys; $i>=0; $i=$i-1) {
   97: 	    if ($first eq lc($keys[$i]))  { 
   98: 		$number = $i;
   99: 		last;
  100: 	    }
  101: 	}
  102:     } elsif ($zeroth eq 'E') {
  103: 	for (my $i=$#keys; $i>=0; $i=$i-1) {
  104: 	    if ('/'.$first eq lc($keys[$i]))  { 
  105: 		$number = $i;
  106: 	 	last;
  107: 	    }
  108: 	}
  109:     }
  110: 	return $number;
  111: }
  112: 
  113: sub testvalue {
  114: 
  115:     my ($number,$zeroth,$second,@values) = @_;   
  116:     my $current_content = $values[$number];
  117:     if ($zeroth eq 'S') {
  118:     my %tempo_hash = %$second;
  119:     while ((my $current_k,my $current_v) = each %tempo_hash) {
  120:         $current_content =~ s/\$$current_k/$current_v/g;
  121:     }
  122:     } elsif ($zeroth eq 'E') {
  123:         $current_content = $values[$number];
  124:     }
  125:     return $current_content;
  126: }
  127: 
  128: 1;
  129: 
  130: __END__