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Annotation of loncom/xml/style.pm, revision 1.9

1.1       sakharuk    1: # The LearningOnline Network with CAPA
1.7       sakharuk    2: # Style Parser Module (new version)
                      3: #
                      4: # written 01/08/01 by Alexander Sakharuk
1.1       sakharuk    5: #
                      6: 
1.7       sakharuk    7: package Apache::style;
1.1       sakharuk    8: 
                      9: use strict;
                     10: use HTML::TokeParser;
                     11: 
                     12: sub styleparser {
                     13: 
1.7       sakharuk   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;
1.8       albertel   34: #	&Apache::lonxml::debug("$current_key\n");
1.7       sakharuk   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);
1.4       sakharuk   55: 		    } else {
1.7       sakharuk   56: 			$current_value .= $stoken->[2];
                     57: 		    } 
                     58: 	        }
                     59: 
                     60: 
                     61: 
                     62: 	    } 
1.4       sakharuk   63: 	}
1.9     ! sakharuk   64:         $current_value =~ s/\n//g;
1.7       sakharuk   65: 	push @values,$current_value;
1.8       albertel   66: #	&Apache::lonxml::debug("a:$current_value $#values \n");
1.7       sakharuk   67: 	$current_key = '';
                     68: 	$current_value ='';
                     69: 	$b_pos = index($content_style_string,'<definetag',$b_pos+1);
                     70:     }
                     71: 
                     72:     for (my $i=0; $i<=$#keys; $i++) {
1.9     ! sakharuk   73: 	push @style_array,lc $keys[$i],$values[$i]; 
1.7       sakharuk   74:     }
1.9     ! sakharuk   75:     my %style_for_target =  @style_array;
1.1       sakharuk   76: 
1.4       sakharuk   77: # check printing
1.7       sakharuk   78:   while (($current_key,$current_value) = each %style_for_target) {
1.8       albertel   79:       &Apache::lonxml::debug("$current_key => $current_value\n");
1.7       sakharuk   80:   }
1.4       sakharuk   81: # return result
1.1       sakharuk   82:   return %style_for_target; 
1.7       sakharuk   83: 
1.4       sakharuk   84: }
                     85: 
1.7       sakharuk   86: sub testkey {
1.4       sakharuk   87: 
1.7       sakharuk   88:     my ($zeroth,$first,@keys) = @_; 
                     89:     my $number = -1;
                     90:     if ($zeroth eq 'S') {
                     91: 	for (my $i=$#keys; $i>=0; $i=$i-1) {
                     92: 	    if ($first eq lc($keys[$i]))  { 
                     93: 		$number = $i;
                     94: 		last;
1.4       sakharuk   95: 	    }
1.7       sakharuk   96: 	}
                     97:     } elsif ($zeroth eq 'E') {
                     98: 	for (my $i=$#keys; $i>=0; $i=$i-1) {
                     99: 	    if ('/'.$first eq lc($keys[$i]))  { 
                    100: 		$number = $i;
                    101: 	 	last;
1.4       sakharuk  102: 	    }
1.7       sakharuk  103: 	}
                    104:     }
                    105: 	return $number;
                    106: }
                    107: 
                    108: sub testvalue {
                    109: 
                    110:     my ($number,$zeroth,$second,@values) = @_;   
                    111:     my $current_content = $values[$number];
                    112:     if ($zeroth eq 'S') {
                    113:     my %tempo_hash = %$second;
                    114:     while ((my $current_k,my $current_v) = each %tempo_hash) {
                    115:         $current_content =~ s/\$$current_k/$current_v/g;
                    116:     }
                    117:     } elsif ($zeroth eq 'E') {
                    118:         $current_content = $values[$number];
                    119:     }
                    120:     return $current_content;
1.1       sakharuk  121: }
                    122: 
                    123: 1;
1.7       sakharuk  124: 
1.1       sakharuk  125: __END__