File Coverage

blib/lib/Indent.pm

Criterion	Covered	Total	%
statement	49	49	100.0
branch	16	16	100.0
condition			n/a
subroutine	10	10	100.0
pod	5	5	100.0
total	80	80	100.0

package Indent;

use strict;
use warnings;

use Class::Utils qw(set_params);
use Error::Pure qw(err);
use Readonly;

# Constants.
Readonly::Scalar my $EMPTY_STR => q{};

our $VERSION = 0.11;

# Constructor.
sub new {
	my ($class, @params) = @_;
	my $self = bless {}, $class;

	# Default indent.
	$self->{'indent'} = $EMPTY_STR;

	# Every next indent string.
	$self->{'next_indent'} = "\t";

	# Process params.
	set_params($self, @params);

	# Check to 'next_indent' parameter.
	if (! defined $self->{'next_indent'}) {
		err "'next_indent' parameter must be defined.";
	}
	if (ref $self->{'next_indent'}) {
		err "'next_indent' parameter must be a string.";
	}

	# Check to 'indent' parameter.
	if (! defined $self->{'indent'}) {
		err "'indent' parameter must be defined.";
	}
	if (ref $self->{'indent'}) {
		err "'indent' parameter must be a string.";
	}

	# Object.
	return $self;
}

# Add an indent to global indent.
sub add {
	my ($self, $indent) = @_;
	if (! defined $indent) {
		$indent = $self->{'next_indent'};
	}
	$self->{'indent'} .= $indent;
	return 1;
}

# Get a indent value.
sub get {
	my $self = shift;
	return $self->{'indent'};
}

# Remove an indent from global indent.
sub remove {
	my ($self, $indent) = @_;
	if (! defined $indent) {
		$indent = $self->{'next_indent'};
	}
	my $indent_length = length $indent;
	if (substr($self->{'indent'}, -$indent_length) ne $indent) {
		err "Cannot remove indent '$indent'.";
	}
	$self->{'indent'} = substr $self->{'indent'}, 0, -$indent_length;
	return 1;
}

# Reseting indent.
sub reset {
	my ($self, $reset_value) = @_;
	if (! defined $reset_value) {
		$reset_value = $EMPTY_STR;
	}
	$self->{'indent'} = $reset_value;
	return 1;
}

1;

__END__