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package PPM::XML::Element; |
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use vars qw( $VERSION ); |
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$VERSION = '0.01_01'; |
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# |
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# PPM::XML::Element |
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# |
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# Base class for XML Elements. Provides the ability to output the XML document |
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# once it's been parsed using the XML::Parser module. |
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# |
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############################################################################### |
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############################################################################### |
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# Required inclusions. |
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############################################################################### |
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use HTML::Entities; # Needed for escaping char entities |
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############################################################################### |
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# Allow for creation via 'new'. |
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############################################################################### |
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sub new |
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{ |
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my ($class, %args) = @_; |
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bless \%args, $class; |
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} |
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############################################################################### |
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# Subroutine: output |
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############################################################################### |
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# Outputs the entire XML document on the currently selected filehandle. |
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############################################################################### |
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sub output |
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{ |
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my $self = shift; |
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print $self->as_text(); |
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} |
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############################################################################### |
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# Subroutine: content |
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############################################################################### |
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# Returns a string containing all of the content of this element. |
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############################################################################### |
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sub content |
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{ |
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my $self = shift; |
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my $kids = $self->{'Kids'}; |
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return unless (defined $kids and ref($kids) eq 'ARRAY'); |
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my @kids = @{ $kids }; |
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my $text; |
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if (@kids > 0) |
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{ |
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foreach (@kids) |
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{ |
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# Allow for outputting of char data |
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if ((ref $_) =~ /::Characters$/o) |
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{ $text .= encode_entities( $_->{'Text'} ); } |
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else |
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{ $text .= $_->as_text(); } |
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} |
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} |
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return $text; |
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} |
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############################################################################### |
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# Subroutine: add_child ($elemref) |
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############################################################################### |
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# Adds a new child element to ourselves. |
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############################################################################### |
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sub add_child (\$) |
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{ |
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my $self = shift; |
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my $elemref = shift; |
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push( @{$self->{'Kids'}}, $elemref ); |
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} |
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############################################################################### |
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# Subroutine: remove_child ($elemref) |
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############################################################################### |
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# Removes a child element from ourselves. Returns non-zero if it was able to |
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# remove the child element, and zero if it was unable to do so. |
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############################################################################### |
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sub remove_child |
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{ |
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my $self = shift; |
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my $elemref = shift; |
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foreach my $idx (0 .. @{$self->{'Kids'}}) |
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{ |
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if ($self->{'Kids'}[$idx] == $elemref) |
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{ |
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splice( @{$self->{'Kids'}}, $idx, 1 ); |
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return 1; |
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} |
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} |
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return 0; |
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} |
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############################################################################### |
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# Subroutine: add_text ($text) |
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############################################################################### |
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# Adds character data to the given element. Returns undef if unable to add the |
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# text to this element, and returns a reference to the character data element |
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# if successful. |
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############################################################################### |
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sub add_text |
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{ |
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my $self = shift; |
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my $text = shift; |
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return if (!defined $text); |
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my $type = ref $self; # Do package name magic |
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$type =~ s/::[^:]+?$/::Characters/o; |
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my $elem = new $type; |
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$elem->{'Text'} = $text; |
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$self->add_child( $elem ); |
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return $elem; |
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} |
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############################################################################### |
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# Subroutine: as_text |
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############################################################################### |
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# Returns a string containing the entire XML document. |
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############################################################################### |
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sub as_text |
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{ |
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my $self = shift; |
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my $text; |
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my $type = ref $self; |
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$type =~ s/.*:://; |
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$text = "\n<" . $type; |
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foreach (sort keys %{$self}) |
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{ |
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if ($_ !~ /Text|Kids/) { |
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if (defined $self->{$_} ) { |
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$text .= " $_=\"" . $self->{$_} . '"'; } |
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} |
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} |
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my $cont = $self->content(); |
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if (defined $cont) |
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{ $text .= '>' . $cont . '' . $type . '>'; } |
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else |
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{ $text .= ' />'; } |
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$text =~ s/\n\n/\n/g; |
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return $text; |
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} |
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__END__ |