#=======================================================================
# ____ ____ _____ _ ____ ___ ____
# | _ \| _ \| ___| _ _ / \ | _ \_ _| |___ \
# | |_) | | | | |_ (_) (_) / _ \ | |_) | | __) |
# | __/| |_| | _| _ _ / ___ \| __/| | / __/
# |_| |____/|_| (_) (_) /_/ \_\_| |___| |_____|
#
# A Perl Module Chain to faciliate the Creation and Modification
# of High-Quality "Portable Document Format (PDF)" Files.
#
#=======================================================================
#
# THIS IS A REUSED PERL MODULE, FOR PROPER LICENCING TERMS SEE BELOW:
#
#
# Copyright Martin Hosken <Martin_Hosken@sil.org>
#
# No warranty or expression of effectiveness, least of all regarding
# anyone's safety, is implied in this software or documentation.
#
# This specific module is licensed under the Perl Artistic License.
#
#
# $Id: Null.pm,v 2.0 2005/11/16 02:16:00 areibens Exp $
#
#=======================================================================
package PDF::API2::Basic::PDF::Null;
=head1 NAME
PDF::API2::Basic::PDF::Null - PDF Null type object. This is a subclass of
PDF::API2::Basic::PDF::Objind and cannot be subclassed.
=head1 METHODS
=cut
use strict;
use vars qw(@ISA);
@ISA = qw(PDF::API2::Basic::PDF::Objind);
no warnings qw[ deprecated recursion uninitialized ];
# There is only one null object (section 3.2.8).
my ($null_obj) = {};
bless $null_obj, "PDF::API2::Basic::PDF::Null";
=head2 PDF::API2::Basic::PDF::Null->new
Returns the null object. There is only one null object.
=cut
sub new {
return $null_obj;
}
=head2 $s->realise
Pretends to finish reading the object.
=cut
sub realise {
return $null_obj;
}
=head2 $s->outobjdeep
Output the object in PDF format.
=cut
sub outobjdeep
{
my ($self, $fh, $pdf) = @_;
$fh->print ("null");
}
sub outxmldeep
{
my ($self, $fh, $pdf, %opts) = @_;
$opts{-xmlfh}->print("<Null/>\n");
}
=head2 $s->is_obj
Returns false because null is not a full object.
=cut
sub is_obj {
return 0;
}
=head2 $s->copy
Another no-op.
=cut
sub copy {
return $null_obj;
}
=head2 $s->val
Return undef.
=cut
sub val
{
return undef;
}
1;