package PDF::API2::JavaScriptSupport;
use strict;
use warnings;
use PDF::API2::Basic::PDF::Utils;

sub new{
  my ($pkg, $pdf) = @_;
  bless{pdf => $pdf->{pdf}},( ref($pkg) || $pkg );
}

sub add{
  my ($this, $script) = @_;
  my $pdf  = $this->{pdf};
  my $objs = $pdf->{' objects'};
  my $ref  = PDF::API2::Resource->new($pdf);
  my $js   = PDF::API2::Resource->new($pdf);
  my ($nref, $gref) = @{$objs->{$ref->uid}}[0,1];
  my ($njs,  $gjs ) = @{$objs->{$js->uid}}[0,1];
  delete $js->{Name};
  delete $ref->{Name};
  $js->{'S'} = PDFName('JavaScript');
  $js->{'JS'} = PDFStr($script);
  $ref->{Names} = PDFArray(PDFStr('EmbeddedJS'),
                           PDFLiteral($njs. ' '.$gjs.' R'));
  my $cat = $pdf->{Root};
  my $dict = PDFDict();
  $dict->{JavaScript} = PDFLiteral(join " ", $nref, $gref, 'R');
  $cat->{Names} = $dict;
}
1;
__END__