1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
package Text::PDF::Null;
=head1 NAME
Text::PDF::Null - PDF Null type object. This is a subclass of
Text::PDF::Objind and cannot be subclassed.
=head1 METHODS
=cut
use strict;
use vars qw(@ISA);
@ISA = qw(Text::PDF::Objind);
# There is only one null object (section 3.2.8).
my ($null_obj) = {};
bless $null_obj, "Text::PDF::Null";
=head2 Text::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");
}
=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;
|
