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Annotation of loncom/xml/style.pm, revision 1.8

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 .= $stoken->[2];
                     57: 		    } 
                     58: 	        }
                     59: 
                     60: 
                     61: 
                     62: 	    } 
1.4       sakharuk   63: 	}
1.7       sakharuk   64: 	push @values,$current_value;
1.8     ! albertel   65: #	&Apache::lonxml::debug("a:$current_value $#values \n");
1.7       sakharuk   66: 	$current_key = '';
                     67: 	$current_value ='';
                     68: 	$b_pos = index($content_style_string,'<definetag',$b_pos+1);
                     69:     }
                     70: 
                     71:     for (my $i=0; $i<=$#keys; $i++) {
                     72: 	push @style_array,$keys[$i],$values[$i]; 
                     73:     }
                     74:     my %style_for_target = @style_array;
1.1       sakharuk   75: 
1.4       sakharuk   76: # check printing
1.7       sakharuk   77:   while (($current_key,$current_value) = each %style_for_target) {
1.8     ! albertel   78:       &Apache::lonxml::debug("$current_key => $current_value\n");
1.7       sakharuk   79:   }
1.4       sakharuk   80: # return result
1.1       sakharuk   81:   return %style_for_target; 
1.7       sakharuk   82: 
1.4       sakharuk   83: }
                     84: 
1.7       sakharuk   85: sub testkey {
1.4       sakharuk   86: 
1.7       sakharuk   87:     my ($zeroth,$first,@keys) = @_; 
                     88:     my $number = -1;
                     89:     if ($zeroth eq 'S') {
                     90: 	for (my $i=$#keys; $i>=0; $i=$i-1) {
                     91: 	    if ($first eq lc($keys[$i]))  { 
                     92: 		$number = $i;
                     93: 		last;
1.4       sakharuk   94: 	    }
1.7       sakharuk   95: 	}
                     96:     } elsif ($zeroth eq 'E') {
                     97: 	for (my $i=$#keys; $i>=0; $i=$i-1) {
                     98: 	    if ('/'.$first eq lc($keys[$i]))  { 
                     99: 		$number = $i;
                    100: 	 	last;
1.4       sakharuk  101: 	    }
1.7       sakharuk  102: 	}
                    103:     }
                    104: 	return $number;
                    105: }
                    106: 
                    107: sub testvalue {
                    108: 
                    109:     my ($number,$zeroth,$second,@values) = @_;   
                    110:     my $current_content = $values[$number];
                    111:     if ($zeroth eq 'S') {
                    112:     my %tempo_hash = %$second;
                    113:     while ((my $current_k,my $current_v) = each %tempo_hash) {
                    114:         $current_content =~ s/\$$current_k/$current_v/g;
                    115:     }
                    116:     } elsif ($zeroth eq 'E') {
                    117:         $current_content = $values[$number];
                    118:     }
                    119:     return $current_content;
1.1       sakharuk  120: }
                    121: 
                    122: 1;
1.7       sakharuk  123: 
1.1       sakharuk  124: __END__