File Coverage

blib/lib/Term/Table/LineBreak.pm

Criterion	Covered	Total	%
statement	56	57	98.2
branch	17	20	85.0
condition	8	9	88.8
subroutine	9	10	90.0
pod	0	4	0.0
total	90	100	90.0

package Term::Table::LineBreak;
use strict;
use warnings;

our $VERSION = '0.017';

use Carp qw/croak/;
use Scalar::Util qw/blessed/;
use Term::Table::Util qw/uni_length/;

use Term::Table::HashBase qw/string gcstring _len _parts idx/;

sub init {
    my $self = shift;

    croak "string is a required attribute"
        unless defined $self->{+STRING};
}

sub columns { uni_length($_[0]->{+STRING}) }

sub break {
    my $self = shift;
    my ($len) = @_;

    $self->{+_LEN} = $len;

    $self->{+IDX} = 0;
    my $str = $self->{+STRING} . ""; # Force stringification

    my @parts;
    my @chars = split //, $str;
    while (@chars) {
        my $size = 0;
        my $part = '';
        until ($size == $len) {
            my $char = shift @chars;
            $char = '' unless defined $char;

            my $l = uni_length("$char");
            last unless $l;

            last if $char eq "\n";

            if ($size + $l > $len) {
                unshift @chars => $char;
                last;
            }

            $size += $l;
            $part .= $char;
        }

        # If we stopped just before a newline, grab it
        shift @chars if $size == $len && @chars && $chars[0] eq "\n";

        until ($size == $len) {
            $part .= ' ';
            $size += 1;
        }
        push @parts => $part;
    }

    $self->{+_PARTS} = \@parts;
}

sub next {
    my $self = shift;

    if (@_) {
        my ($len) = @_;
        $self->break($len) if !$self->{+_LEN} || $self->{+_LEN} != $len;
    }
    else {
        croak "String has not yet been broken"
            unless $self->{+_PARTS};
    }

    my $idx   = $self->{+IDX}++;
    my $parts = $self->{+_PARTS};

    return undef if $idx >= @$parts;
    return $parts->[$idx];
}

1;

__END__