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package Text::PDF::Name;
use strict;
use vars qw(@ISA);
# no warnings qw(uninitialized);
use Text::PDF::String;
@ISA = qw(Text::PDF::String);
=head1 NAME
Text::PDF::Name - Inherits from L<Text::PDF::String> and stores PDF names (things
beginning with /)
=head1 METHODS
=head2 Text::PDF::Name->from_pdf($string)
Creates a new string object (not a full object yet) from a given string.
The string is parsed according to input criteria with escaping working, particular
to Names.
=cut
sub from_pdf
{
my ($class, $str, $pdf) = @_;
my ($self) = $class->SUPER::from_pdf($str);
$self->{'val'} = name_to_string ($self->{'val'}, $pdf);
$self;
}
=head2 $n->convert ($str, $pdf)
Converts a name into a string by removing the / and converting any hex
munging unless $pdf is supplied and its version is less than 1.2.
=cut
sub convert
{
my ($self, $str, $pdf) = @_;
$str = name_to_string ($str, $pdf);
return $str;
}
=head2 $s->as_pdf ($pdf)
Returns a name formatted as PDF. $pdf is optional but should be the
PDF File object for which the name is intended if supplied.
=cut
sub as_pdf
{
my ($self, $pdf) = @_;
my ($str) = $self->{'val'};
$str = string_to_name ($str, $pdf);
return ("/" . $str);
}
# Prior to PDF version 1.2, `#' was a literal character. Embedded
# spaces were implicitly allowed in names as well but it would be best
# to ignore that (PDF reference 2nd edition, Appendix H, section 3.2.4.3).
=head2 Text::PDF::Name->string_to_name ($str, $pdf)
Suitably encode the string $str for output in the File object $pdf
(the exact format may depend on the version of $pdf). Prinicipally,
encode certain characters in hex if the version is greater than 1.1.
=cut
sub string_to_name ($;$)
{
my ($str, $pdf) = @_;
if (!defined($pdf) || (defined $pdf->{' version'} && $pdf->{' version'} >= 2))
{ $str =~ s|([\001-\040\177-\377%()\[\]{}<>#/])|"#".sprintf("%02X", ord($1))|oge; }
return $str;
}
=head2 Text::PDF::Name->name_to_string ($str, $pdf)
Suitably decode the string $str as read from the File object $pdf (the
exact decoding may depend on the version of $pdf). Principally, undo
the hex encoding for PDF versions > 1.1.
=cut
sub name_to_string ($;$)
{
my ($str, $pdf) = @_;
$str =~ s|^/||o;
if (!defined($pdf) || (defined $pdf->{' version'} && $pdf->{' version'} >= 2))
{ $str =~ s/#([0-9a-f]{2})/chr(hex($1))/oige; }
return $str;
}
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