package Font::TTF::Kern::OrderedList;

=head1 NAME

Font::TTF::Kern::OrderedList - Ordered List Kern subtable for AAT

=head1 METHODS

=cut

use strict;

use vars qw(@ISA);

use Font::TTF::Utils;

use Font::TTF::AATutils;

@ISA = qw(Font::TTF::Kern::Subtable);

sub new

{

    my ($class, @options) = @_;

    my ($self) = {};

    $class = ref($class) || $class;

    bless $self, $class;

}

=head2 $t->read

Reads the table into memory

=cut

sub read

{

    my ($self, $fh) = @_;

    my $dat;

    $fh->read($dat, 8);

    my ($nPairs, $searchRange, $entrySelector, $rangeShift) = unpack("nnnn", $dat);

    my $pairs = [];

    foreach (1 .. $nPairs) {

        $fh->read($dat, 6);

        my ($left, $right, $kern) = TTF_Unpack("SSs", $dat);

        push @$pairs, { 'left' => $left, 'right' => $right, 'kern' => $kern } if $kern != 0;

    }

    $self->{'kernPairs'} = $pairs;

    $self;

}

=head2 $t->out_sub($fh)

Writes the table to a file

=cut

sub out_sub

{

    my ($self, $fh) = @_;

    my $pairs = $self->{'kernPairs'};

    $fh->print(pack("nnnn", TTF_bininfo(scalar @$pairs, 6)));

    foreach (sort { $a->{'left'} <=> $b->{'left'} or $a->{'right'} <=> $b->{'right'} } @$pairs) {

        $fh->print(TTF_Pack("SSs", $_->{'left'}, $_->{'right'}, $_->{'kern'}));

    }

}

=head2 $t->print($fh)

Prints a human-readable representation of the table

=cut

sub out_xml

{

    my ($self, $context, $depth, $k, $val) = @_;

    my ($fh) = $context->{'fh'};

    my $postVal = $self->post()->{'VAL'};

    $fh = 'STDOUT' unless defined $fh;

    foreach (@{$self->{'kernPairs'}}) {

        $fh->printf("$depth$context->{'indent'}<pair l=\"%s\" r=\"%s\" v=\"%s\"/>\n", $postVal->[$_->{'left'}], $postVal->[$_->{'right'}], $_->{'kern'});

    }

}

sub type

{

    return 'kernOrderedList';

}

1;

=head1 BUGS

None known

=head1 AUTHOR

Jonathan Kew L<http://scripts.sil.org/FontUtils>. 

=head1 LICENSING

Copyright (c) 1998-2016, SIL International (http://www.sil.org) 

This module is released under the terms of the Artistic License 2.0. 

For details, see the full text of the license in the file LICENSE.

=cut