File Coverage

blib/lib/DTL/Fast/Filter/Center.pm

Criterion	Covered	Total	%
statement	26	27	96.3
branch	3	6	50.0
condition			n/a
subroutine	7	7	100.0
pod	0	3	0.0
total	36	43	83.7

package DTL::Fast::Filter::Center;
use strict; use utf8; use warnings FATAL => 'all';
use parent 'DTL::Fast::Filter';

$DTL::Fast::FILTER_HANDLERS{'center'} = __PACKAGE__;

#@Override
sub parse_parameters
{
    my $self = shift;
    die $self->get_parse_error("no width specified for adjusting")
        if not scalar @{$self->{'parameter'}};
    $self->{'width'} = $self->{'parameter'}->[0];
    return $self;
}

#@Override
sub filter
{
    my ($self, $filter_manager, $value, $context) = @_;

    my $width = $self->{'width'}->render($context);

    if( $width =~ /^\d+$/ )
    {
        my $adjustment = ($width - length $value);
        if( $adjustment > 0 )
        {
            $value = $self->adjust($value, $adjustment);
        }
    }
    else
    {
        die $self->get_render_error("Argument must be a positive number, not '$width'");
    }
    return $value;
}

sub adjust
{
    my ($self, $value, $adjustment) = @_;
    return (' 'x int($adjustment/2)).$value;
}

1;